LXR linux/drivers/net/wireless/atmel.c

   1/*** -*- linux-c -*- **********************************************************
   2
   3     Driver for Atmel at76c502 at76c504 and at76c506 wireless cards.
   4
   5        Copyright 2000-2001 ATMEL Corporation.
   6        Copyright 2003-2004 Simon Kelley.
   7
   8    This code was developed from version 2.1.1 of the Atmel drivers,
   9    released by Atmel corp. under the GPL in December 2002. It also
  10    includes code from the Linux aironet drivers (C) Benjamin Reed,
  11    and the Linux PCMCIA package, (C) David Hinds and the Linux wireless
  12    extensions, (C) Jean Tourrilhes.
  13
  14    The firmware module for reading the MAC address of the card comes from
  15    net.russotto.AtmelMACFW, written by Matthew T. Russotto and copyright
  16    by him. net.russotto.AtmelMACFW is used under the GPL license version 2.
  17    This file contains the module in binary form and, under the terms
  18    of the GPL, in source form. The source is located at the end of the file.
  19
  20    This program is free software; you can redistribute it and/or modify
  21    it under the terms of the GNU General Public License as published by
  22    the Free Software Foundation; either version 2 of the License, or
  23    (at your option) any later version.
  24
  25    This software is distributed in the hope that it will be useful,
  26    but WITHOUT ANY WARRANTY; without even the implied warranty of
  27    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  28    GNU General Public License for more details.
  29
  30    You should have received a copy of the GNU General Public License
  31    along with Atmel wireless lan drivers; if not, write to the Free Software
  32    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  33
  34    For all queries about this code, please contact the current author,
  35    Simon Kelley <simon@thekelleys.org.uk> and not Atmel Corporation.
  36
  37    Credit is due to HP UK and Cambridge Online Systems Ltd for supplying
  38    hardware used during development of this driver.
  39
  40******************************************************************************/
  41
  42#include <linux/init.h>
  43
  44#include <linux/kernel.h>
  45#include <linux/ptrace.h>
  46#include <linux/slab.h>
  47#include <linux/string.h>
  48#include <linux/ctype.h>
  49#include <linux/timer.h>
  50#include <asm/byteorder.h>
  51#include <asm/io.h>
  52#include <asm/system.h>
  53#include <asm/uaccess.h>
  54#include <linux/module.h>
  55#include <linux/netdevice.h>
  56#include <linux/etherdevice.h>
  57#include <linux/skbuff.h>
  58#include <linux/if_arp.h>
  59#include <linux/ioport.h>
  60#include <linux/fcntl.h>
  61#include <linux/delay.h>
  62#include <linux/wireless.h>
  63#include <net/iw_handler.h>
  64#include <linux/crc32.h>
  65#include <linux/proc_fs.h>
  66#include <linux/device.h>
  67#include <linux/moduleparam.h>
  68#include <linux/firmware.h>
  69#include <linux/jiffies.h>
  70#include <net/ieee80211.h>
  71#include "atmel.h"
  72
  73#define DRIVER_MAJOR 0
  74#define DRIVER_MINOR 98
  75
  76MODULE_AUTHOR("Simon Kelley");
  77MODULE_DESCRIPTION("Support for Atmel at76c50x 802.11 wireless ethernet cards.");
  78MODULE_LICENSE("GPL");
  79MODULE_SUPPORTED_DEVICE("Atmel at76c50x wireless cards");
  80
  81/* The name of the firmware file to be loaded
  82   over-rides any automatic selection */
  83static char *firmware = NULL;
  84module_param(firmware, charp, 0);
  85
  86/* table of firmware file names */
  87static struct {
  88        AtmelFWType fw_type;
  89        const char *fw_file;
  90        const char *fw_file_ext;
  91} fw_table[] = {
  92        { ATMEL_FW_TYPE_502,      "atmel_at76c502",      "bin" },
  93        { ATMEL_FW_TYPE_502D,     "atmel_at76c502d",     "bin" },
  94        { ATMEL_FW_TYPE_502E,     "atmel_at76c502e",     "bin" },
  95        { ATMEL_FW_TYPE_502_3COM, "atmel_at76c502_3com", "bin" },
  96        { ATMEL_FW_TYPE_504,      "atmel_at76c504",      "bin" },
  97        { ATMEL_FW_TYPE_504_2958, "atmel_at76c504_2958", "bin" },
  98        { ATMEL_FW_TYPE_504A_2958,"atmel_at76c504a_2958","bin" },
  99        { ATMEL_FW_TYPE_506,      "atmel_at76c506",      "bin" },
 100        { ATMEL_FW_TYPE_NONE,      NULL,                  NULL }
 101};
 102
 103#define MAX_SSID_LENGTH 32
 104#define MGMT_JIFFIES (256 * HZ / 100)
 105
 106#define MAX_BSS_ENTRIES 64
 107
 108/* registers */
 109#define GCR  0x00    //      (SIR0)  General Configuration Register
 110#define BSR  0x02    //      (SIR1)  Bank Switching Select Register
 111#define AR   0x04
 112#define DR   0x08
 113#define MR1  0x12    //      Mirror Register 1
 114#define MR2  0x14    //      Mirror Register 2
 115#define MR3  0x16    //      Mirror Register 3
 116#define MR4  0x18    //      Mirror Register 4
 117
 118#define GPR1                            0x0c
 119#define GPR2                            0x0e
 120#define GPR3                            0x10
 121//
 122// Constants for the GCR register.
 123//
 124#define GCR_REMAP     0x0400          // Remap internal SRAM to 0
 125#define GCR_SWRES     0x0080          // BIU reset (ARM and PAI are NOT reset)
 126#define GCR_CORES     0x0060          // Core Reset (ARM and PAI are reset)
 127#define GCR_ENINT     0x0002          // Enable Interrupts
 128#define GCR_ACKINT    0x0008          // Acknowledge Interrupts
 129
 130#define BSS_SRAM      0x0200          // AMBA module selection --> SRAM
 131#define BSS_IRAM      0x0100          // AMBA module selection --> IRAM
 132//
 133// Constants for the MR registers.
 134//
 135#define MAC_INIT_COMPLETE       0x0001        // MAC init has been completed
 136#define MAC_BOOT_COMPLETE       0x0010        // MAC boot has been completed
 137#define MAC_INIT_OK             0x0002        // MAC boot has been completed
 138
 139#define MIB_MAX_DATA_BYTES    212
 140#define MIB_HEADER_SIZE       4    /* first four fields */
 141
 142struct get_set_mib {
 143        u8 type;
 144        u8 size;
 145        u8 index;
 146        u8 reserved;
 147        u8 data[MIB_MAX_DATA_BYTES];
 148};
 149
 150struct rx_desc {
 151        u32          Next;
 152        u16          MsduPos;
 153        u16          MsduSize;
 154
 155        u8           State;
 156        u8           Status;
 157        u8           Rate;
 158        u8           Rssi;
 159        u8           LinkQuality;
 160        u8           PreambleType;
 161        u16          Duration;
 162        u32          RxTime;
 163};
 164
 165#define RX_DESC_FLAG_VALID       0x80
 166#define RX_DESC_FLAG_CONSUMED    0x40
 167#define RX_DESC_FLAG_IDLE        0x00
 168
 169#define RX_STATUS_SUCCESS        0x00
 170
 171#define RX_DESC_MSDU_POS_OFFSET      4
 172#define RX_DESC_MSDU_SIZE_OFFSET     6
 173#define RX_DESC_FLAGS_OFFSET         8
 174#define RX_DESC_STATUS_OFFSET        9
 175#define RX_DESC_RSSI_OFFSET          11
 176#define RX_DESC_LINK_QUALITY_OFFSET  12
 177#define RX_DESC_PREAMBLE_TYPE_OFFSET 13
 178#define RX_DESC_DURATION_OFFSET      14
 179#define RX_DESC_RX_TIME_OFFSET       16
 180
 181struct tx_desc {
 182        u32       NextDescriptor;
 183        u16       TxStartOfFrame;
 184        u16       TxLength;
 185
 186        u8        TxState;
 187        u8        TxStatus;
 188        u8        RetryCount;
 189
 190        u8        TxRate;
 191
 192        u8        KeyIndex;
 193        u8        ChiperType;
 194        u8        ChipreLength;
 195        u8        Reserved1;
 196
 197        u8        Reserved;
 198        u8        PacketType;
 199        u16       HostTxLength;
 200};
 201
 202#define TX_DESC_NEXT_OFFSET          0
 203#define TX_DESC_POS_OFFSET           4
 204#define TX_DESC_SIZE_OFFSET          6
 205#define TX_DESC_FLAGS_OFFSET         8
 206#define TX_DESC_STATUS_OFFSET        9
 207#define TX_DESC_RETRY_OFFSET         10
 208#define TX_DESC_RATE_OFFSET          11
 209#define TX_DESC_KEY_INDEX_OFFSET     12
 210#define TX_DESC_CIPHER_TYPE_OFFSET   13
 211#define TX_DESC_CIPHER_LENGTH_OFFSET 14
 212#define TX_DESC_PACKET_TYPE_OFFSET   17
 213#define TX_DESC_HOST_LENGTH_OFFSET   18
 214
 215///////////////////////////////////////////////////////
 216// Host-MAC interface
 217///////////////////////////////////////////////////////
 218
 219#define TX_STATUS_SUCCESS       0x00
 220
 221#define TX_FIRM_OWN             0x80
 222#define TX_DONE                 0x40
 223
 224#define TX_ERROR                0x01
 225
 226#define TX_PACKET_TYPE_DATA     0x01
 227#define TX_PACKET_TYPE_MGMT     0x02
 228
 229#define ISR_EMPTY               0x00        // no bits set in ISR
 230#define ISR_TxCOMPLETE          0x01        // packet transmitted
 231#define ISR_RxCOMPLETE          0x02        // packet received
 232#define ISR_RxFRAMELOST         0x04        // Rx Frame lost
 233#define ISR_FATAL_ERROR         0x08        // Fatal error
 234#define ISR_COMMAND_COMPLETE    0x10        // command completed
 235#define ISR_OUT_OF_RANGE        0x20        // command completed
 236#define ISR_IBSS_MERGE          0x40        // (4.1.2.30): IBSS merge
 237#define ISR_GENERIC_IRQ         0x80
 238
 239#define Local_Mib_Type          0x01
 240#define Mac_Address_Mib_Type    0x02
 241#define Mac_Mib_Type            0x03
 242#define Statistics_Mib_Type     0x04
 243#define Mac_Mgmt_Mib_Type       0x05
 244#define Mac_Wep_Mib_Type        0x06
 245#define Phy_Mib_Type            0x07
 246#define Multi_Domain_MIB        0x08
 247
 248#define MAC_MGMT_MIB_CUR_BSSID_POS            14
 249#define MAC_MIB_FRAG_THRESHOLD_POS            8
 250#define MAC_MIB_RTS_THRESHOLD_POS             10
 251#define MAC_MIB_SHORT_RETRY_POS               16
 252#define MAC_MIB_LONG_RETRY_POS                17
 253#define MAC_MIB_SHORT_RETRY_LIMIT_POS         16
 254#define MAC_MGMT_MIB_BEACON_PER_POS           0
 255#define MAC_MGMT_MIB_STATION_ID_POS           6
 256#define MAC_MGMT_MIB_CUR_PRIVACY_POS          11
 257#define MAC_MGMT_MIB_CUR_BSSID_POS            14
 258#define MAC_MGMT_MIB_PS_MODE_POS              53
 259#define MAC_MGMT_MIB_LISTEN_INTERVAL_POS      54
 260#define MAC_MGMT_MIB_MULTI_DOMAIN_IMPLEMENTED 56
 261#define MAC_MGMT_MIB_MULTI_DOMAIN_ENABLED     57
 262#define PHY_MIB_CHANNEL_POS                   14
 263#define PHY_MIB_RATE_SET_POS                  20
 264#define PHY_MIB_REG_DOMAIN_POS                26
 265#define LOCAL_MIB_AUTO_TX_RATE_POS            3
 266#define LOCAL_MIB_SSID_SIZE                   5
 267#define LOCAL_MIB_TX_PROMISCUOUS_POS          6
 268#define LOCAL_MIB_TX_MGMT_RATE_POS            7
 269#define LOCAL_MIB_TX_CONTROL_RATE_POS         8
 270#define LOCAL_MIB_PREAMBLE_TYPE               9
 271#define MAC_ADDR_MIB_MAC_ADDR_POS             0
 272
 273#define         CMD_Set_MIB_Vars              0x01
 274#define         CMD_Get_MIB_Vars              0x02
 275#define         CMD_Scan                      0x03
 276#define         CMD_Join                      0x04
 277#define         CMD_Start                     0x05
 278#define         CMD_EnableRadio               0x06
 279#define         CMD_DisableRadio              0x07
 280#define         CMD_SiteSurvey                0x0B
 281
 282#define         CMD_STATUS_IDLE                   0x00
 283#define         CMD_STATUS_COMPLETE               0x01
 284#define         CMD_STATUS_UNKNOWN                0x02
 285#define         CMD_STATUS_INVALID_PARAMETER      0x03
 286#define         CMD_STATUS_FUNCTION_NOT_SUPPORTED 0x04
 287#define         CMD_STATUS_TIME_OUT               0x07
 288#define         CMD_STATUS_IN_PROGRESS            0x08
 289#define         CMD_STATUS_REJECTED_RADIO_OFF     0x09
 290#define         CMD_STATUS_HOST_ERROR             0xFF
 291#define         CMD_STATUS_BUSY                   0xFE
 292
 293#define CMD_BLOCK_COMMAND_OFFSET        0
 294#define CMD_BLOCK_STATUS_OFFSET         1
 295#define CMD_BLOCK_PARAMETERS_OFFSET     4
 296
 297#define SCAN_OPTIONS_SITE_SURVEY        0x80
 298
 299#define MGMT_FRAME_BODY_OFFSET          24
 300#define MAX_AUTHENTICATION_RETRIES      3
 301#define MAX_ASSOCIATION_RETRIES         3
 302
 303#define AUTHENTICATION_RESPONSE_TIME_OUT  1000
 304
 305#define MAX_WIRELESS_BODY  2316 /* mtu is 2312, CRC is 4 */
 306#define LOOP_RETRY_LIMIT   500000
 307
 308#define ACTIVE_MODE     1
 309#define PS_MODE         2
 310
 311#define MAX_ENCRYPTION_KEYS 4
 312#define MAX_ENCRYPTION_KEY_SIZE 40
 313
 314///////////////////////////////////////////////////////////////////////////
 315// 802.11 related definitions
 316///////////////////////////////////////////////////////////////////////////
 317
 318//
 319// Regulatory Domains
 320//
 321
 322#define REG_DOMAIN_FCC          0x10    //Channels      1-11    USA
 323#define REG_DOMAIN_DOC          0x20    //Channel       1-11    Canada
 324#define REG_DOMAIN_ETSI         0x30    //Channel       1-13    Europe (ex Spain/France)
 325#define REG_DOMAIN_SPAIN        0x31    //Channel       10-11   Spain
 326#define REG_DOMAIN_FRANCE       0x32    //Channel       10-13   France
 327#define REG_DOMAIN_MKK          0x40    //Channel       14      Japan
 328#define REG_DOMAIN_MKK1         0x41    //Channel       1-14    Japan(MKK1)
 329#define REG_DOMAIN_ISRAEL       0x50    //Channel       3-9     ISRAEL
 330
 331#define BSS_TYPE_AD_HOC         1
 332#define BSS_TYPE_INFRASTRUCTURE 2
 333
 334#define SCAN_TYPE_ACTIVE        0
 335#define SCAN_TYPE_PASSIVE       1
 336
 337#define LONG_PREAMBLE           0
 338#define SHORT_PREAMBLE          1
 339#define AUTO_PREAMBLE           2
 340
 341#define DATA_FRAME_WS_HEADER_SIZE   30
 342
 343/* promiscuous mode control */
 344#define PROM_MODE_OFF                   0x0
 345#define PROM_MODE_UNKNOWN               0x1
 346#define PROM_MODE_CRC_FAILED            0x2
 347#define PROM_MODE_DUPLICATED            0x4
 348#define PROM_MODE_MGMT                  0x8
 349#define PROM_MODE_CTRL                  0x10
 350#define PROM_MODE_BAD_PROTOCOL          0x20
 351
 352#define IFACE_INT_STATUS_OFFSET         0
 353#define IFACE_INT_MASK_OFFSET           1
 354#define IFACE_LOCKOUT_HOST_OFFSET       2
 355#define IFACE_LOCKOUT_MAC_OFFSET        3
 356#define IFACE_FUNC_CTRL_OFFSET          28
 357#define IFACE_MAC_STAT_OFFSET           30
 358#define IFACE_GENERIC_INT_TYPE_OFFSET   32
 359
 360#define CIPHER_SUITE_NONE     0
 361#define CIPHER_SUITE_WEP_64   1
 362#define CIPHER_SUITE_TKIP     2
 363#define CIPHER_SUITE_AES      3
 364#define CIPHER_SUITE_CCX      4
 365#define CIPHER_SUITE_WEP_128  5
 366
 367//
 368// IFACE MACROS & definitions
 369//
 370//
 371
 372// FuncCtrl field:
 373//
 374#define FUNC_CTRL_TxENABLE              0x10
 375#define FUNC_CTRL_RxENABLE              0x20
 376#define FUNC_CTRL_INIT_COMPLETE         0x01
 377
 378/* A stub firmware image which reads the MAC address from NVRAM on the card.
 379   For copyright information and source see the end of this file. */
 380static u8 mac_reader[] = {
 381        0x06,0x00,0x00,0xea,0x04,0x00,0x00,0xea,0x03,0x00,0x00,0xea,0x02,0x00,0x00,0xea,
 382        0x01,0x00,0x00,0xea,0x00,0x00,0x00,0xea,0xff,0xff,0xff,0xea,0xfe,0xff,0xff,0xea,
 383        0xd3,0x00,0xa0,0xe3,0x00,0xf0,0x21,0xe1,0x0e,0x04,0xa0,0xe3,0x00,0x10,0xa0,0xe3,
 384        0x81,0x11,0xa0,0xe1,0x00,0x10,0x81,0xe3,0x00,0x10,0x80,0xe5,0x1c,0x10,0x90,0xe5,
 385        0x10,0x10,0xc1,0xe3,0x1c,0x10,0x80,0xe5,0x01,0x10,0xa0,0xe3,0x08,0x10,0x80,0xe5,
 386        0x02,0x03,0xa0,0xe3,0x00,0x10,0xa0,0xe3,0xb0,0x10,0xc0,0xe1,0xb4,0x10,0xc0,0xe1,
 387        0xb8,0x10,0xc0,0xe1,0xbc,0x10,0xc0,0xe1,0x56,0xdc,0xa0,0xe3,0x21,0x00,0x00,0xeb,
 388        0x0a,0x00,0xa0,0xe3,0x1a,0x00,0x00,0xeb,0x10,0x00,0x00,0xeb,0x07,0x00,0x00,0xeb,
 389        0x02,0x03,0xa0,0xe3,0x02,0x14,0xa0,0xe3,0xb4,0x10,0xc0,0xe1,0x4c,0x10,0x9f,0xe5,
 390        0xbc,0x10,0xc0,0xe1,0x10,0x10,0xa0,0xe3,0xb8,0x10,0xc0,0xe1,0xfe,0xff,0xff,0xea,
 391        0x00,0x40,0x2d,0xe9,0x00,0x20,0xa0,0xe3,0x02,0x3c,0xa0,0xe3,0x00,0x10,0xa0,0xe3,
 392        0x28,0x00,0x9f,0xe5,0x37,0x00,0x00,0xeb,0x00,0x40,0xbd,0xe8,0x1e,0xff,0x2f,0xe1,
 393        0x00,0x40,0x2d,0xe9,0x12,0x2e,0xa0,0xe3,0x06,0x30,0xa0,0xe3,0x00,0x10,0xa0,0xe3,
 394        0x02,0x04,0xa0,0xe3,0x2f,0x00,0x00,0xeb,0x00,0x40,0xbd,0xe8,0x1e,0xff,0x2f,0xe1,
 395        0x00,0x02,0x00,0x02,0x80,0x01,0x90,0xe0,0x01,0x00,0x00,0x0a,0x01,0x00,0x50,0xe2,
 396        0xfc,0xff,0xff,0xea,0x1e,0xff,0x2f,0xe1,0x80,0x10,0xa0,0xe3,0xf3,0x06,0xa0,0xe3,
 397        0x00,0x10,0x80,0xe5,0x00,0x10,0xa0,0xe3,0x00,0x10,0x80,0xe5,0x01,0x10,0xa0,0xe3,
 398        0x04,0x10,0x80,0xe5,0x00,0x10,0x80,0xe5,0x0e,0x34,0xa0,0xe3,0x1c,0x10,0x93,0xe5,
 399        0x02,0x1a,0x81,0xe3,0x1c,0x10,0x83,0xe5,0x58,0x11,0x9f,0xe5,0x30,0x10,0x80,0xe5,
 400        0x54,0x11,0x9f,0xe5,0x34,0x10,0x80,0xe5,0x38,0x10,0x80,0xe5,0x3c,0x10,0x80,0xe5,
 401        0x10,0x10,0x90,0xe5,0x08,0x00,0x90,0xe5,0x1e,0xff,0x2f,0xe1,0xf3,0x16,0xa0,0xe3,
 402        0x08,0x00,0x91,0xe5,0x05,0x00,0xa0,0xe3,0x0c,0x00,0x81,0xe5,0x10,0x00,0x91,0xe5,
 403        0x02,0x00,0x10,0xe3,0xfc,0xff,0xff,0x0a,0xff,0x00,0xa0,0xe3,0x0c,0x00,0x81,0xe5,
 404        0x10,0x00,0x91,0xe5,0x02,0x00,0x10,0xe3,0xfc,0xff,0xff,0x0a,0x08,0x00,0x91,0xe5,
 405        0x10,0x00,0x91,0xe5,0x01,0x00,0x10,0xe3,0xfc,0xff,0xff,0x0a,0x08,0x00,0x91,0xe5,
 406        0xff,0x00,0x00,0xe2,0x1e,0xff,0x2f,0xe1,0x30,0x40,0x2d,0xe9,0x00,0x50,0xa0,0xe1,
 407        0x03,0x40,0xa0,0xe1,0xa2,0x02,0xa0,0xe1,0x08,0x00,0x00,0xe2,0x03,0x00,0x80,0xe2,
 408        0xd8,0x10,0x9f,0xe5,0x00,0x00,0xc1,0xe5,0x01,0x20,0xc1,0xe5,0xe2,0xff,0xff,0xeb,
 409        0x01,0x00,0x10,0xe3,0xfc,0xff,0xff,0x1a,0x14,0x00,0xa0,0xe3,0xc4,0xff,0xff,0xeb,
 410        0x04,0x20,0xa0,0xe1,0x05,0x10,0xa0,0xe1,0x02,0x00,0xa0,0xe3,0x01,0x00,0x00,0xeb,
 411        0x30,0x40,0xbd,0xe8,0x1e,0xff,0x2f,0xe1,0x70,0x40,0x2d,0xe9,0xf3,0x46,0xa0,0xe3,
 412        0x00,0x30,0xa0,0xe3,0x00,0x00,0x50,0xe3,0x08,0x00,0x00,0x9a,0x8c,0x50,0x9f,0xe5,
 413        0x03,0x60,0xd5,0xe7,0x0c,0x60,0x84,0xe5,0x10,0x60,0x94,0xe5,0x02,0x00,0x16,0xe3,
 414        0xfc,0xff,0xff,0x0a,0x01,0x30,0x83,0xe2,0x00,0x00,0x53,0xe1,0xf7,0xff,0xff,0x3a,
 415        0xff,0x30,0xa0,0xe3,0x0c,0x30,0x84,0xe5,0x08,0x00,0x94,0xe5,0x10,0x00,0x94,0xe5,
 416        0x01,0x00,0x10,0xe3,0xfc,0xff,0xff,0x0a,0x08,0x00,0x94,0xe5,0x00,0x00,0xa0,0xe3,
 417        0x00,0x00,0x52,0xe3,0x0b,0x00,0x00,0x9a,0x10,0x50,0x94,0xe5,0x02,0x00,0x15,0xe3,
 418        0xfc,0xff,0xff,0x0a,0x0c,0x30,0x84,0xe5,0x10,0x50,0x94,0xe5,0x01,0x00,0x15,0xe3,
 419        0xfc,0xff,0xff,0x0a,0x08,0x50,0x94,0xe5,0x01,0x50,0xc1,0xe4,0x01,0x00,0x80,0xe2,
 420        0x02,0x00,0x50,0xe1,0xf3,0xff,0xff,0x3a,0xc8,0x00,0xa0,0xe3,0x98,0xff,0xff,0xeb,
 421        0x70,0x40,0xbd,0xe8,0x1e,0xff,0x2f,0xe1,0x01,0x0c,0x00,0x02,0x01,0x02,0x00,0x02,
 422        0x00,0x01,0x00,0x02
 423};
 424
 425struct atmel_private {
 426        void *card; /* Bus dependent stucture varies for PCcard */
 427        int (*present_callback)(void *); /* And callback which uses it */
 428        char firmware_id[32];
 429        AtmelFWType firmware_type;
 430        u8 *firmware;
 431        int firmware_length;
 432        struct timer_list management_timer;
 433        struct net_device *dev;
 434        struct device *sys_dev;
 435        struct iw_statistics wstats;
 436        spinlock_t irqlock, timerlock;  // spinlocks
 437        enum { BUS_TYPE_PCCARD, BUS_TYPE_PCI } bus_type;
 438        enum {
 439                CARD_TYPE_PARALLEL_FLASH,
 440                CARD_TYPE_SPI_FLASH,
 441                CARD_TYPE_EEPROM
 442        } card_type;
 443        int do_rx_crc; /* If we need to CRC incoming packets */
 444        int probe_crc; /* set if we don't yet know */
 445        int crc_ok_cnt, crc_ko_cnt; /* counters for probing */
 446        u16 rx_desc_head;
 447        u16 tx_desc_free, tx_desc_head, tx_desc_tail, tx_desc_previous;
 448        u16 tx_free_mem, tx_buff_head, tx_buff_tail;
 449
 450        u16 frag_seq, frag_len, frag_no;
 451        u8 frag_source[6];
 452
 453        u8 wep_is_on, default_key, exclude_unencrypted, encryption_level;
 454        u8 group_cipher_suite, pairwise_cipher_suite;
 455        u8 wep_keys[MAX_ENCRYPTION_KEYS][MAX_ENCRYPTION_KEY_SIZE];
 456        int wep_key_len[MAX_ENCRYPTION_KEYS];
 457        int use_wpa, radio_on_broken; /* firmware dependent stuff. */
 458
 459        u16 host_info_base;
 460        struct host_info_struct {
 461                /* NB this is matched to the hardware, don't change. */
 462                u8 volatile int_status;
 463                u8 volatile int_mask;
 464                u8 volatile lockout_host;
 465                u8 volatile lockout_mac;
 466
 467                u16 tx_buff_pos;
 468                u16 tx_buff_size;
 469                u16 tx_desc_pos;
 470                u16 tx_desc_count;
 471
 472                u16 rx_buff_pos;
 473                u16 rx_buff_size;
 474                u16 rx_desc_pos;
 475                u16 rx_desc_count;
 476
 477                u16 build_version;
 478                u16 command_pos;
 479
 480                u16 major_version;
 481                u16 minor_version;
 482
 483                u16 func_ctrl;
 484                u16 mac_status;
 485                u16 generic_IRQ_type;
 486                u8  reserved[2];
 487        } host_info;
 488
 489        enum {
 490                STATION_STATE_SCANNING,
 491                STATION_STATE_JOINNING,
 492                STATION_STATE_AUTHENTICATING,
 493                STATION_STATE_ASSOCIATING,
 494                STATION_STATE_READY,
 495                STATION_STATE_REASSOCIATING,
 496                STATION_STATE_DOWN,
 497                STATION_STATE_MGMT_ERROR
 498        } station_state;
 499
 500        int operating_mode, power_mode;
 501        time_t last_qual;
 502        int beacons_this_sec;
 503        int channel;
 504        int reg_domain, config_reg_domain;
 505        int tx_rate;
 506        int auto_tx_rate;
 507        int rts_threshold;
 508        int frag_threshold;
 509        int long_retry, short_retry;
 510        int preamble;
 511        int default_beacon_period, beacon_period, listen_interval;
 512        int CurrentAuthentTransactionSeqNum, ExpectedAuthentTransactionSeqNum;
 513        int AuthenticationRequestRetryCnt, AssociationRequestRetryCnt, ReAssociationRequestRetryCnt;
 514        enum {
 515                SITE_SURVEY_IDLE,
 516                SITE_SURVEY_IN_PROGRESS,
 517                SITE_SURVEY_COMPLETED
 518        } site_survey_state;
 519        unsigned long last_survey;
 520
 521        int station_was_associated, station_is_associated;
 522        int fast_scan;
 523
 524        struct bss_info {
 525                int channel;
 526                int SSIDsize;
 527                int RSSI;
 528                int UsingWEP;
 529                int preamble;
 530                int beacon_period;
 531                int BSStype;
 532                u8 BSSID[6];
 533                u8 SSID[MAX_SSID_LENGTH];
 534        } BSSinfo[MAX_BSS_ENTRIES];
 535        int BSS_list_entries, current_BSS;
 536        int connect_to_any_BSS;
 537        int SSID_size, new_SSID_size;
 538        u8 CurrentBSSID[6], BSSID[6];
 539        u8 SSID[MAX_SSID_LENGTH], new_SSID[MAX_SSID_LENGTH];
 540        u64 last_beacon_timestamp;
 541        u8 rx_buf[MAX_WIRELESS_BODY];
 542};
 543
 544static u8 atmel_basic_rates[4] = {0x82,0x84,0x0b,0x16};
 545
 546static const struct {
 547        int reg_domain;
 548        int min, max;
 549        char *name;
 550} channel_table[] = { { REG_DOMAIN_FCC, 1, 11, "USA" },
 551                      { REG_DOMAIN_DOC, 1, 11, "Canada" },
 552                      { REG_DOMAIN_ETSI, 1, 13, "Europe" },
 553                      { REG_DOMAIN_SPAIN, 10, 11, "Spain" },
 554                      { REG_DOMAIN_FRANCE, 10, 13, "France" },
 555                      { REG_DOMAIN_MKK, 14, 14, "MKK" },
 556                      { REG_DOMAIN_MKK1, 1, 14, "MKK1" },
 557                      { REG_DOMAIN_ISRAEL, 3, 9, "Israel"} };
 558
 559static void build_wpa_mib(struct atmel_private *priv);
 560static int atmel_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 561static void atmel_copy_to_card(struct net_device *dev, u16 dest,
 562                               const unsigned char *src, u16 len);
 563static void atmel_copy_to_host(struct net_device *dev, unsigned char *dest,
 564                               u16 src, u16 len);
 565static void atmel_set_gcr(struct net_device *dev, u16 mask);
 566static void atmel_clear_gcr(struct net_device *dev, u16 mask);
 567static int atmel_lock_mac(struct atmel_private *priv);
 568static void atmel_wmem32(struct atmel_private *priv, u16 pos, u32 data);
 569static void atmel_command_irq(struct atmel_private *priv);
 570static int atmel_validate_channel(struct atmel_private *priv, int channel);
 571static void atmel_management_frame(struct atmel_private *priv,
 572                                   struct ieee80211_hdr_4addr *header,
 573                                   u16 frame_len, u8 rssi);
 574static void atmel_management_timer(u_long a);
 575static void atmel_send_command(struct atmel_private *priv, int command,
 576                               void *cmd, int cmd_size);
 577static int atmel_send_command_wait(struct atmel_private *priv, int command,
 578                                   void *cmd, int cmd_size);
 579static void atmel_transmit_management_frame(struct atmel_private *priv,
 580                                            struct ieee80211_hdr_4addr *header,
 581                                            u8 *body, int body_len);
 582
 583static u8 atmel_get_mib8(struct atmel_private *priv, u8 type, u8 index);
 584static void atmel_set_mib8(struct atmel_private *priv, u8 type, u8 index,
 585                           u8 data);
 586static void atmel_set_mib16(struct atmel_private *priv, u8 type, u8 index,
 587                            u16 data);
 588static void atmel_set_mib(struct atmel_private *priv, u8 type, u8 index,
 589                          u8 *data, int data_len);
 590static void atmel_get_mib(struct atmel_private *priv, u8 type, u8 index,
 591                          u8 *data, int data_len);
 592static void atmel_scan(struct atmel_private *priv, int specific_ssid);
 593static void atmel_join_bss(struct atmel_private *priv, int bss_index);
 594static void atmel_smooth_qual(struct atmel_private *priv);
 595static void atmel_writeAR(struct net_device *dev, u16 data);
 596static int probe_atmel_card(struct net_device *dev);
 597static int reset_atmel_card(struct net_device *dev);
 598static void atmel_enter_state(struct atmel_private *priv, int new_state);
 599int atmel_open (struct net_device *dev);
 600
 601static inline u16 atmel_hi(struct atmel_private *priv, u16 offset)
 602{
 603        return priv->host_info_base + offset;
 604}
 605
 606static inline u16 atmel_co(struct atmel_private *priv, u16 offset)
 607{
 608        return priv->host_info.command_pos + offset;
 609}
 610
 611static inline u16 atmel_rx(struct atmel_private *priv, u16 offset, u16 desc)
 612{
 613        return priv->host_info.rx_desc_pos + (sizeof(struct rx_desc) * desc) + offset;
 614}
 615
 616static inline u16 atmel_tx(struct atmel_private *priv, u16 offset, u16 desc)
 617{
 618        return priv->host_info.tx_desc_pos + (sizeof(struct tx_desc) * desc) + offset;
 619}
 620
 621static inline u8 atmel_read8(struct net_device *dev, u16 offset)
 622{
 623        return inb(dev->base_addr + offset);
 624}
 625
 626static inline void atmel_write8(struct net_device *dev, u16 offset, u8 data)
 627{
 628        outb(data, dev->base_addr + offset);
 629}
 630
 631static inline u16 atmel_read16(struct net_device *dev, u16 offset)
 632{
 633        return inw(dev->base_addr + offset);
 634}
 635
 636static inline void atmel_write16(struct net_device *dev, u16 offset, u16 data)
 637{
 638        outw(data, dev->base_addr + offset);
 639}
 640
 641static inline u8 atmel_rmem8(struct atmel_private *priv, u16 pos)
 642{
 643        atmel_writeAR(priv->dev, pos);
 644        return atmel_read8(priv->dev, DR);
 645}
 646
 647static inline void atmel_wmem8(struct atmel_private *priv, u16 pos, u16 data)
 648{
 649        atmel_writeAR(priv->dev, pos);
 650        atmel_write8(priv->dev, DR, data);
 651}
 652
 653static inline u16 atmel_rmem16(struct atmel_private *priv, u16 pos)
 654{
 655        atmel_writeAR(priv->dev, pos);
 656        return atmel_read16(priv->dev, DR);
 657}
 658
 659static inline void atmel_wmem16(struct atmel_private *priv, u16 pos, u16 data)
 660{
 661        atmel_writeAR(priv->dev, pos);
 662        atmel_write16(priv->dev, DR, data);
 663}
 664
 665static const struct iw_handler_def atmel_handler_def;
 666
 667static void tx_done_irq(struct atmel_private *priv)
 668{
 669        int i;
 670
 671        for (i = 0;
 672             atmel_rmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, priv->tx_desc_head)) == TX_DONE &&
 673                     i < priv->host_info.tx_desc_count;
 674             i++) {
 675                u8 status = atmel_rmem8(priv, atmel_tx(priv, TX_DESC_STATUS_OFFSET, priv->tx_desc_head));
 676                u16 msdu_size = atmel_rmem16(priv, atmel_tx(priv, TX_DESC_SIZE_OFFSET, priv->tx_desc_head));
 677                u8 type = atmel_rmem8(priv, atmel_tx(priv, TX_DESC_PACKET_TYPE_OFFSET, priv->tx_desc_head));
 678
 679                atmel_wmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, priv->tx_desc_head), 0);
 680
 681                priv->tx_free_mem += msdu_size;
 682                priv->tx_desc_free++;
 683
 684                if (priv->tx_buff_head + msdu_size > (priv->host_info.tx_buff_pos + priv->host_info.tx_buff_size))
 685                        priv->tx_buff_head = 0;
 686                else
 687                        priv->tx_buff_head += msdu_size;
 688
 689                if (priv->tx_desc_head < (priv->host_info.tx_desc_count - 1))
 690                        priv->tx_desc_head++ ;
 691                else
 692                        priv->tx_desc_head = 0;
 693
 694                if (type == TX_PACKET_TYPE_DATA) {
 695                        if (status == TX_STATUS_SUCCESS)
 696                                priv->dev->stats.tx_packets++;
 697                        else
 698                                priv->dev->stats.tx_errors++;
 699                        netif_wake_queue(priv->dev);
 700                }
 701        }
 702}
 703
 704static u16 find_tx_buff(struct atmel_private *priv, u16 len)
 705{
 706        u16 bottom_free = priv->host_info.tx_buff_size - priv->tx_buff_tail;
 707
 708        if (priv->tx_desc_free == 3 || priv->tx_free_mem < len)
 709                return 0;
 710
 711        if (bottom_free >= len)
 712                return priv->host_info.tx_buff_pos + priv->tx_buff_tail;
 713
 714        if (priv->tx_free_mem - bottom_free >= len) {
 715                priv->tx_buff_tail = 0;
 716                return priv->host_info.tx_buff_pos;
 717        }
 718
 719        return 0;
 720}
 721
 722static void tx_update_descriptor(struct atmel_private *priv, int is_bcast,
 723                                 u16 len, u16 buff, u8 type)
 724{
 725        atmel_wmem16(priv, atmel_tx(priv, TX_DESC_POS_OFFSET, priv->tx_desc_tail), buff);
 726        atmel_wmem16(priv, atmel_tx(priv, TX_DESC_SIZE_OFFSET, priv->tx_desc_tail), len);
 727        if (!priv->use_wpa)
 728                atmel_wmem16(priv, atmel_tx(priv, TX_DESC_HOST_LENGTH_OFFSET, priv->tx_desc_tail), len);
 729        atmel_wmem8(priv, atmel_tx(priv, TX_DESC_PACKET_TYPE_OFFSET, priv->tx_desc_tail), type);
 730        atmel_wmem8(priv, atmel_tx(priv, TX_DESC_RATE_OFFSET, priv->tx_desc_tail), priv->tx_rate);
 731        atmel_wmem8(priv, atmel_tx(priv, TX_DESC_RETRY_OFFSET, priv->tx_desc_tail), 0);
 732        if (priv->use_wpa) {
 733                int cipher_type, cipher_length;
 734                if (is_bcast) {
 735                        cipher_type = priv->group_cipher_suite;
 736                        if (cipher_type == CIPHER_SUITE_WEP_64 ||
 737                            cipher_type == CIPHER_SUITE_WEP_128)
 738                                cipher_length = 8;
 739                        else if (cipher_type == CIPHER_SUITE_TKIP)
 740                                cipher_length = 12;
 741                        else if (priv->pairwise_cipher_suite == CIPHER_SUITE_WEP_64 ||
 742                                 priv->pairwise_cipher_suite == CIPHER_SUITE_WEP_128) {
 743                                cipher_type = priv->pairwise_cipher_suite;
 744                                cipher_length = 8;
 745                        } else {
 746                                cipher_type = CIPHER_SUITE_NONE;
 747                                cipher_length = 0;
 748                        }
 749                } else {
 750                        cipher_type = priv->pairwise_cipher_suite;
 751                        if (cipher_type == CIPHER_SUITE_WEP_64 ||
 752                            cipher_type == CIPHER_SUITE_WEP_128)
 753                                cipher_length = 8;
 754                        else if (cipher_type == CIPHER_SUITE_TKIP)
 755                                cipher_length = 12;
 756                        else if (priv->group_cipher_suite == CIPHER_SUITE_WEP_64 ||
 757                                 priv->group_cipher_suite == CIPHER_SUITE_WEP_128) {
 758                                cipher_type = priv->group_cipher_suite;
 759                                cipher_length = 8;
 760                        } else {
 761                                cipher_type = CIPHER_SUITE_NONE;
 762                                cipher_length = 0;
 763                        }
 764                }
 765
 766                atmel_wmem8(priv, atmel_tx(priv, TX_DESC_CIPHER_TYPE_OFFSET, priv->tx_desc_tail),
 767                            cipher_type);
 768                atmel_wmem8(priv, atmel_tx(priv, TX_DESC_CIPHER_LENGTH_OFFSET, priv->tx_desc_tail),
 769                            cipher_length);
 770        }
 771        atmel_wmem32(priv, atmel_tx(priv, TX_DESC_NEXT_OFFSET, priv->tx_desc_tail), 0x80000000L);
 772        atmel_wmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, priv->tx_desc_tail), TX_FIRM_OWN);
 773        if (priv->tx_desc_previous != priv->tx_desc_tail)
 774                atmel_wmem32(priv, atmel_tx(priv, TX_DESC_NEXT_OFFSET, priv->tx_desc_previous), 0);
 775        priv->tx_desc_previous = priv->tx_desc_tail;
 776        if (priv->tx_desc_tail < (priv->host_info.tx_desc_count - 1))
 777                priv->tx_desc_tail++;
 778        else
 779                priv->tx_desc_tail = 0;
 780        priv->tx_desc_free--;
 781        priv->tx_free_mem -= len;
 782}
 783
 784static int start_tx(struct sk_buff *skb, struct net_device *dev)
 785{
 786        static const u8 SNAP_RFC1024[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 787        struct atmel_private *priv = netdev_priv(dev);
 788        struct ieee80211_hdr_4addr header;
 789        unsigned long flags;
 790        u16 buff, frame_ctl, len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
 791
 792        if (priv->card && priv->present_callback &&
 793            !(*priv->present_callback)(priv->card)) {
 794                dev->stats.tx_errors++;
 795                dev_kfree_skb(skb);
 796                return 0;
 797        }
 798
 799        if (priv->station_state != STATION_STATE_READY) {
 800                dev->stats.tx_errors++;
 801                dev_kfree_skb(skb);
 802                return 0;
 803        }
 804
 805        /* first ensure the timer func cannot run */
 806        spin_lock_bh(&priv->timerlock);
 807        /* then stop the hardware ISR */
 808        spin_lock_irqsave(&priv->irqlock, flags);
 809        /* nb doing the above in the opposite order will deadlock */
 810
 811        /* The Wireless Header is 30 bytes. In the Ethernet packet we "cut" the
 812           12 first bytes (containing DA/SA) and put them in the appropriate
 813           fields of the Wireless Header. Thus the packet length is then the
 814           initial + 18 (+30-12) */
 815
 816        if (!(buff = find_tx_buff(priv, len + 18))) {
 817                dev->stats.tx_dropped++;
 818                spin_unlock_irqrestore(&priv->irqlock, flags);
 819                spin_unlock_bh(&priv->timerlock);
 820                netif_stop_queue(dev);
 821                return 1;
 822        }
 823
 824        frame_ctl = IEEE80211_FTYPE_DATA;
 825        header.duration_id = 0;
 826        header.seq_ctl = 0;
 827        if (priv->wep_is_on)
 828                frame_ctl |= IEEE80211_FCTL_PROTECTED;
 829        if (priv->operating_mode == IW_MODE_ADHOC) {
 830                skb_copy_from_linear_data(skb, &header.addr1, 6);
 831                memcpy(&header.addr2, dev->dev_addr, 6);
 832                memcpy(&header.addr3, priv->BSSID, 6);
 833        } else {
 834                frame_ctl |= IEEE80211_FCTL_TODS;
 835                memcpy(&header.addr1, priv->CurrentBSSID, 6);
 836                memcpy(&header.addr2, dev->dev_addr, 6);
 837                skb_copy_from_linear_data(skb, &header.addr3, 6);
 838        }
 839
 840        if (priv->use_wpa)
 841                memcpy(&header.addr4, SNAP_RFC1024, 6);
 842
 843        header.frame_ctl = cpu_to_le16(frame_ctl);
 844        /* Copy the wireless header into the card */
 845        atmel_copy_to_card(dev, buff, (unsigned char *)&header, DATA_FRAME_WS_HEADER_SIZE);
 846        /* Copy the packet sans its 802.3 header addresses which have been replaced */
 847        atmel_copy_to_card(dev, buff + DATA_FRAME_WS_HEADER_SIZE, skb->data + 12, len - 12);
 848        priv->tx_buff_tail += len - 12 + DATA_FRAME_WS_HEADER_SIZE;
 849
 850        /* low bit of first byte of destination tells us if broadcast */
 851        tx_update_descriptor(priv, *(skb->data) & 0x01, len + 18, buff, TX_PACKET_TYPE_DATA);
 852        dev->trans_start = jiffies;
 853        dev->stats.tx_bytes += len;
 854
 855        spin_unlock_irqrestore(&priv->irqlock, flags);
 856        spin_unlock_bh(&priv->timerlock);
 857        dev_kfree_skb(skb);
 858
 859        return 0;
 860}
 861
 862static void atmel_transmit_management_frame(struct atmel_private *priv,
 863                                            struct ieee80211_hdr_4addr *header,
 864                                            u8 *body, int body_len)
 865{
 866        u16 buff;
 867        int len = MGMT_FRAME_BODY_OFFSET + body_len;
 868
 869        if (!(buff = find_tx_buff(priv, len)))
 870                return;
 871
 872        atmel_copy_to_card(priv->dev, buff, (u8 *)header, MGMT_FRAME_BODY_OFFSET);
 873        atmel_copy_to_card(priv->dev, buff + MGMT_FRAME_BODY_OFFSET, body, body_len);
 874        priv->tx_buff_tail += len;
 875        tx_update_descriptor(priv, header->addr1[0] & 0x01, len, buff, TX_PACKET_TYPE_MGMT);
 876}
 877
 878static void fast_rx_path(struct atmel_private *priv,
 879                         struct ieee80211_hdr_4addr *header,
 880                         u16 msdu_size, u16 rx_packet_loc, u32 crc)
 881{
 882        /* fast path: unfragmented packet copy directly into skbuf */
 883        u8 mac4[6];
 884        struct sk_buff  *skb;
 885        unsigned char *skbp;
 886
 887        /* get the final, mac 4 header field, this tells us encapsulation */
 888        atmel_copy_to_host(priv->dev, mac4, rx_packet_loc + 24, 6);
 889        msdu_size -= 6;
 890
 891        if (priv->do_rx_crc) {
 892                crc = crc32_le(crc, mac4, 6);
 893                msdu_size -= 4;
 894        }
 895
 896        if (!(skb = dev_alloc_skb(msdu_size + 14))) {
 897                priv->dev->stats.rx_dropped++;
 898                return;
 899        }
 900
 901        skb_reserve(skb, 2);
 902        skbp = skb_put(skb, msdu_size + 12);
 903        atmel_copy_to_host(priv->dev, skbp + 12, rx_packet_loc + 30, msdu_size);
 904
 905        if (priv->do_rx_crc) {
 906                u32 netcrc;
 907                crc = crc32_le(crc, skbp + 12, msdu_size);
 908                atmel_copy_to_host(priv->dev, (void *)&netcrc, rx_packet_loc + 30 + msdu_size, 4);
 909                if ((crc ^ 0xffffffff) != netcrc) {
 910                        priv->dev->stats.rx_crc_errors++;
 911                        dev_kfree_skb(skb);
 912                        return;
 913                }
 914        }
 915
 916        memcpy(skbp, header->addr1, 6); /* destination address */
 917        if (le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_FROMDS)
 918                memcpy(&skbp[6], header->addr3, 6);
 919        else
 920                memcpy(&skbp[6], header->addr2, 6); /* source address */
 921
 922        priv->dev->last_rx = jiffies;
 923        skb->protocol = eth_type_trans(skb, priv->dev);
 924        skb->ip_summed = CHECKSUM_NONE;
 925        netif_rx(skb);
 926        priv->dev->stats.rx_bytes += 12 + msdu_size;
 927        priv->dev->stats.rx_packets++;
 928}
 929
 930/* Test to see if the packet in card memory at packet_loc has a valid CRC
 931   It doesn't matter that this is slow: it is only used to proble the first few
 932   packets. */
 933static int probe_crc(struct atmel_private *priv, u16 packet_loc, u16 msdu_size)
 934{
 935        int i = msdu_size - 4;
 936        u32 netcrc, crc = 0xffffffff;
 937
 938        if (msdu_size < 4)
 939                return 0;
 940
 941        atmel_copy_to_host(priv->dev, (void *)&netcrc, packet_loc + i, 4);
 942
 943        atmel_writeAR(priv->dev, packet_loc);
 944        while (i--) {
 945                u8 octet = atmel_read8(priv->dev, DR);
 946                crc = crc32_le(crc, &octet, 1);
 947        }
 948
 949        return (crc ^ 0xffffffff) == netcrc;
 950}
 951
 952static void frag_rx_path(struct atmel_private *priv,
 953                         struct ieee80211_hdr_4addr *header,
 954                         u16 msdu_size, u16 rx_packet_loc, u32 crc, u16 seq_no,
 955                         u8 frag_no, int more_frags)
 956{
 957        u8 mac4[6];
 958        u8 source[6];
 959        struct sk_buff *skb;
 960
 961        if (le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_FROMDS)
 962                memcpy(source, header->addr3, 6);
 963        else
 964                memcpy(source, header->addr2, 6);
 965
 966        rx_packet_loc += 24; /* skip header */
 967
 968        if (priv->do_rx_crc)
 969                msdu_size -= 4;
 970
 971        if (frag_no == 0) { /* first fragment */
 972                atmel_copy_to_host(priv->dev, mac4, rx_packet_loc, 6);
 973                msdu_size -= 6;
 974                rx_packet_loc += 6;
 975
 976                if (priv->do_rx_crc)
 977                        crc = crc32_le(crc, mac4, 6);
 978
 979                priv->frag_seq = seq_no;
 980                priv->frag_no = 1;
 981                priv->frag_len = msdu_size;
 982                memcpy(priv->frag_source, source, 6);
 983                memcpy(&priv->rx_buf[6], source, 6);
 984                memcpy(priv->rx_buf, header->addr1, 6);
 985
 986                atmel_copy_to_host(priv->dev, &priv->rx_buf[12], rx_packet_loc, msdu_size);
 987
 988                if (priv->do_rx_crc) {
 989                        u32 netcrc;
 990                        crc = crc32_le(crc, &priv->rx_buf[12], msdu_size);
 991                        atmel_copy_to_host(priv->dev, (void *)&netcrc, rx_packet_loc + msdu_size, 4);
 992                        if ((crc ^ 0xffffffff) != netcrc) {
 993                                priv->dev->stats.rx_crc_errors++;
 994                                memset(priv->frag_source, 0xff, 6);
 995                        }
 996                }
 997
 998        } else if (priv->frag_no == frag_no &&
 999                   priv->frag_seq == seq_no &&
1000                   memcmp(priv->frag_source, source, 6) == 0) {

1001
1002                atmel_copy_to_host(priv->dev, &priv->rx_buf[12 + priv->frag_len],
1003                                   rx_packet_loc, msdu_size);
1004                if (priv->do_rx_crc) {
1005                        u32 netcrc;
1006                        crc = crc32_le(crc,
1007                                       &priv->rx_buf[12 + priv->frag_len],
1008                                       msdu_size);
1009                        atmel_copy_to_host(priv->dev, (void *)&netcrc, rx_packet_loc + msdu_size, 4);
1010                        if ((crc ^ 0xffffffff) != netcrc) {
1011                                priv->dev->stats.rx_crc_errors++;
1012                                memset(priv->frag_source, 0xff, 6);
1013                                more_frags = 1; /* don't send broken assembly */
1014                        }
1015                }
1016
1017                priv->frag_len += msdu_size;
1018                priv->frag_no++;
1019
1020                if (!more_frags) { /* last one */
1021                        memset(priv->frag_source, 0xff, 6);
1022                        if (!(skb = dev_alloc_skb(priv->frag_len + 14))) {
1023                                priv->dev->stats.rx_dropped++;
1024                        } else {
1025                                skb_reserve(skb, 2);
1026                                memcpy(skb_put(skb, priv->frag_len + 12),
1027                                       priv->rx_buf,
1028                                       priv->frag_len + 12);
1029                                priv->dev->last_rx = jiffies;
1030                                skb->protocol = eth_type_trans(skb, priv->dev);
1031                                skb->ip_summed = CHECKSUM_NONE;
1032                                netif_rx(skb);
1033                                priv->dev->stats.rx_bytes += priv->frag_len + 12;
1034                                priv->dev->stats.rx_packets++;
1035                        }
1036                }
1037        } else
1038                priv->wstats.discard.fragment++;
1039}
1040
1041static void rx_done_irq(struct atmel_private *priv)
1042{
1043        int i;
1044        struct ieee80211_hdr_4addr header;
1045
1046        for (i = 0;
1047             atmel_rmem8(priv, atmel_rx(priv, RX_DESC_FLAGS_OFFSET, priv->rx_desc_head)) == RX_DESC_FLAG_VALID &&
1048                     i < priv->host_info.rx_desc_count;
1049             i++) {
1050
1051                u16 msdu_size, rx_packet_loc, frame_ctl, seq_control;
1052                u8 status = atmel_rmem8(priv, atmel_rx(priv, RX_DESC_STATUS_OFFSET, priv->rx_desc_head));
1053                u32 crc = 0xffffffff;
1054
1055                if (status != RX_STATUS_SUCCESS) {
1056                        if (status == 0xc1) /* determined by experiment */
1057                                priv->wstats.discard.nwid++;
1058                        else
1059                                priv->dev->stats.rx_errors++;
1060                        goto next;
1061                }
1062
1063                msdu_size = atmel_rmem16(priv, atmel_rx(priv, RX_DESC_MSDU_SIZE_OFFSET, priv->rx_desc_head));
1064                rx_packet_loc = atmel_rmem16(priv, atmel_rx(priv, RX_DESC_MSDU_POS_OFFSET, priv->rx_desc_head));
1065
1066                if (msdu_size < 30) {
1067                        priv->dev->stats.rx_errors++;
1068                        goto next;
1069                }
1070
1071                /* Get header as far as end of seq_ctl */
1072                atmel_copy_to_host(priv->dev, (char *)&header, rx_packet_loc, 24);
1073                frame_ctl = le16_to_cpu(header.frame_ctl);
1074                seq_control = le16_to_cpu(header.seq_ctl);
1075
1076                /* probe for CRC use here if needed  once five packets have
1077                   arrived with the same crc status, we assume we know what's
1078                   happening and stop probing */
1079                if (priv->probe_crc) {
1080                        if (!priv->wep_is_on || !(frame_ctl & IEEE80211_FCTL_PROTECTED)) {
1081                                priv->do_rx_crc = probe_crc(priv, rx_packet_loc, msdu_size);
1082                        } else {
1083                                priv->do_rx_crc = probe_crc(priv, rx_packet_loc + 24, msdu_size - 24);
1084                        }
1085                        if (priv->do_rx_crc) {
1086                                if (priv->crc_ok_cnt++ > 5)
1087                                        priv->probe_crc = 0;
1088                        } else {
1089                                if (priv->crc_ko_cnt++ > 5)
1090                                        priv->probe_crc = 0;
1091                        }
1092                }
1093
1094                /* don't CRC header when WEP in use */
1095                if (priv->do_rx_crc && (!priv->wep_is_on || !(frame_ctl & IEEE80211_FCTL_PROTECTED))) {
1096                        crc = crc32_le(0xffffffff, (unsigned char *)&header, 24);
1097                }
1098                msdu_size -= 24; /* header */
1099
1100                if ((frame_ctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) {
1101                        int more_fragments = frame_ctl & IEEE80211_FCTL_MOREFRAGS;
1102                        u8 packet_fragment_no = seq_control & IEEE80211_SCTL_FRAG;
1103                        u16 packet_sequence_no = (seq_control & IEEE80211_SCTL_SEQ) >> 4;
1104
1105                        if (!more_fragments && packet_fragment_no == 0) {
1106                                fast_rx_path(priv, &header, msdu_size, rx_packet_loc, crc);
1107                        } else {
1108                                frag_rx_path(priv, &header, msdu_size, rx_packet_loc, crc,
1109                                             packet_sequence_no, packet_fragment_no, more_fragments);
1110                        }
1111                }
1112
1113                if ((frame_ctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1114                        /* copy rest of packet into buffer */
1115                        atmel_copy_to_host(priv->dev, (unsigned char *)&priv->rx_buf, rx_packet_loc + 24, msdu_size);
1116
1117                        /* we use the same buffer for frag reassembly and control packets */
1118                        memset(priv->frag_source, 0xff, 6);
1119
1120                        if (priv->do_rx_crc) {
1121                                /* last 4 octets is crc */
1122                                msdu_size -= 4;
1123                                crc = crc32_le(crc, (unsigned char *)&priv->rx_buf, msdu_size);
1124                                if ((crc ^ 0xffffffff) != (*((u32 *)&priv->rx_buf[msdu_size]))) {
1125                                        priv->dev->stats.rx_crc_errors++;
1126                                        goto next;
1127                                }
1128                        }
1129
1130                        atmel_management_frame(priv, &header, msdu_size,
1131                                               atmel_rmem8(priv, atmel_rx(priv, RX_DESC_RSSI_OFFSET, priv->rx_desc_head)));
1132                }
1133
1134next:
1135                /* release descriptor */
1136                atmel_wmem8(priv, atmel_rx(priv, RX_DESC_FLAGS_OFFSET, priv->rx_desc_head), RX_DESC_FLAG_CONSUMED);
1137
1138                if (priv->rx_desc_head < (priv->host_info.rx_desc_count - 1))
1139                        priv->rx_desc_head++;
1140                else
1141                        priv->rx_desc_head = 0;
1142        }
1143}
1144
1145static irqreturn_t service_interrupt(int irq, void *dev_id)
1146{
1147        struct net_device *dev = (struct net_device *) dev_id;
1148        struct atmel_private *priv = netdev_priv(dev);
1149        u8 isr;
1150        int i = -1;
1151        static u8 irq_order[] = {
1152                ISR_OUT_OF_RANGE,
1153                ISR_RxCOMPLETE,
1154                ISR_TxCOMPLETE,
1155                ISR_RxFRAMELOST,
1156                ISR_FATAL_ERROR,
1157                ISR_COMMAND_COMPLETE,
1158                ISR_IBSS_MERGE,
1159                ISR_GENERIC_IRQ
1160        };
1161
1162        if (priv->card && priv->present_callback &&
1163            !(*priv->present_callback)(priv->card))
1164                return IRQ_HANDLED;
1165
1166        /* In this state upper-level code assumes it can mess with
1167           the card unhampered by interrupts which may change register state.
1168           Note that even though the card shouldn't generate interrupts
1169           the inturrupt line may be shared. This allows card setup
1170           to go on without disabling interrupts for a long time. */
1171        if (priv->station_state == STATION_STATE_DOWN)
1172                return IRQ_NONE;
1173
1174        atmel_clear_gcr(dev, GCR_ENINT); /* disable interrupts */
1175
1176        while (1) {
1177                if (!atmel_lock_mac(priv)) {
1178                        /* failed to contact card */
1179                        printk(KERN_ALERT "%s: failed to contact MAC.\n", dev->name);
1180                        return IRQ_HANDLED;
1181                }
1182
1183                isr = atmel_rmem8(priv, atmel_hi(priv, IFACE_INT_STATUS_OFFSET));
1184                atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 0);
1185
1186                if (!isr) {
1187                        atmel_set_gcr(dev, GCR_ENINT); /* enable interrupts */
1188                        return i == -1 ? IRQ_NONE : IRQ_HANDLED;
1189                }
1190
1191                atmel_set_gcr(dev, GCR_ACKINT); /* acknowledge interrupt */
1192
1193                for (i = 0; i < ARRAY_SIZE(irq_order); i++)
1194                        if (isr & irq_order[i])
1195                                break;
1196
1197                if (!atmel_lock_mac(priv)) {
1198                        /* failed to contact card */
1199                        printk(KERN_ALERT "%s: failed to contact MAC.\n", dev->name);
1200                        return IRQ_HANDLED;
1201                }
1202
1203                isr = atmel_rmem8(priv, atmel_hi(priv, IFACE_INT_STATUS_OFFSET));
1204                isr ^= irq_order[i];
1205                atmel_wmem8(priv, atmel_hi(priv, IFACE_INT_STATUS_OFFSET), isr);
1206                atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 0);
1207
1208                switch (irq_order[i]) {
1209
1210                case ISR_OUT_OF_RANGE:
1211                        if (priv->operating_mode == IW_MODE_INFRA &&
1212                            priv->station_state == STATION_STATE_READY) {
1213                                priv->station_is_associated = 0;
1214                                atmel_scan(priv, 1);
1215                        }
1216                        break;
1217
1218                case ISR_RxFRAMELOST:
1219                        priv->wstats.discard.misc++;
1220                        /* fall through */
1221                case ISR_RxCOMPLETE:
1222                        rx_done_irq(priv);
1223                        break;
1224
1225                case ISR_TxCOMPLETE:
1226                        tx_done_irq(priv);
1227                        break;
1228
1229                case ISR_FATAL_ERROR:
1230                        printk(KERN_ALERT "%s: *** FATAL error interrupt ***\n", dev->name);
1231                        atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
1232                        break;
1233
1234                case ISR_COMMAND_COMPLETE:
1235                        atmel_command_irq(priv);
1236                        break;
1237
1238                case ISR_IBSS_MERGE:
1239                        atmel_get_mib(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_CUR_BSSID_POS,
1240                                      priv->CurrentBSSID, 6);
1241                        /* The WPA stuff cares about the current AP address */
1242                        if (priv->use_wpa)
1243                                build_wpa_mib(priv);
1244                        break;
1245                case ISR_GENERIC_IRQ:
1246                        printk(KERN_INFO "%s: Generic_irq received.\n", dev->name);
1247                        break;
1248                }
1249        }
1250}
1251
1252static struct iw_statistics *atmel_get_wireless_stats(struct net_device *dev)
1253{
1254        struct atmel_private *priv = netdev_priv(dev);
1255
1256        /* update the link quality here in case we are seeing no beacons
1257           at all to drive the process */
1258        atmel_smooth_qual(priv);
1259
1260        priv->wstats.status = priv->station_state;
1261
1262        if (priv->operating_mode == IW_MODE_INFRA) {
1263                if (priv->station_state != STATION_STATE_READY) {
1264                        priv->wstats.qual.qual = 0;
1265                        priv->wstats.qual.level = 0;
1266                        priv->wstats.qual.updated = (IW_QUAL_QUAL_INVALID
1267                                        | IW_QUAL_LEVEL_INVALID);
1268                }
1269                priv->wstats.qual.noise = 0;
1270                priv->wstats.qual.updated |= IW_QUAL_NOISE_INVALID;
1271        } else {
1272                /* Quality levels cannot be determined in ad-hoc mode,
1273                   because we can 'hear' more that one remote station. */
1274                priv->wstats.qual.qual = 0;
1275                priv->wstats.qual.level = 0;
1276                priv->wstats.qual.noise = 0;
1277                priv->wstats.qual.updated = IW_QUAL_QUAL_INVALID
1278                                        | IW_QUAL_LEVEL_INVALID
1279                                        | IW_QUAL_NOISE_INVALID;
1280                priv->wstats.miss.beacon = 0;
1281        }
1282
1283        return &priv->wstats;
1284}
1285
1286static int atmel_change_mtu(struct net_device *dev, int new_mtu)
1287{
1288        if ((new_mtu < 68) || (new_mtu > 2312))
1289                return -EINVAL;
1290        dev->mtu = new_mtu;
1291        return 0;
1292}
1293
1294static int atmel_set_mac_address(struct net_device *dev, void *p)
1295{
1296        struct sockaddr *addr = p;
1297
1298        memcpy (dev->dev_addr, addr->sa_data, dev->addr_len);
1299        return atmel_open(dev);
1300}
1301
1302EXPORT_SYMBOL(atmel_open);
1303
1304int atmel_open(struct net_device *dev)
1305{
1306        struct atmel_private *priv = netdev_priv(dev);
1307        int i, channel, err;
1308
1309        /* any scheduled timer is no longer needed and might screw things up.. */
1310        del_timer_sync(&priv->management_timer);
1311
1312        /* Interrupts will not touch the card once in this state... */
1313        priv->station_state = STATION_STATE_DOWN;
1314
1315        if (priv->new_SSID_size) {
1316                memcpy(priv->SSID, priv->new_SSID, priv->new_SSID_size);
1317                priv->SSID_size = priv->new_SSID_size;
1318                priv->new_SSID_size = 0;
1319        }
1320        priv->BSS_list_entries = 0;
1321
1322        priv->AuthenticationRequestRetryCnt = 0;
1323        priv->AssociationRequestRetryCnt = 0;
1324        priv->ReAssociationRequestRetryCnt = 0;
1325        priv->CurrentAuthentTransactionSeqNum = 0x0001;
1326        priv->ExpectedAuthentTransactionSeqNum = 0x0002;
1327
1328        priv->site_survey_state = SITE_SURVEY_IDLE;
1329        priv->station_is_associated = 0;
1330
1331        err = reset_atmel_card(dev);
1332        if (err)
1333                return err;
1334
1335        if (priv->config_reg_domain) {
1336                priv->reg_domain = priv->config_reg_domain;
1337                atmel_set_mib8(priv, Phy_Mib_Type, PHY_MIB_REG_DOMAIN_POS, priv->reg_domain);
1338        } else {
1339                priv->reg_domain = atmel_get_mib8(priv, Phy_Mib_Type, PHY_MIB_REG_DOMAIN_POS);
1340                for (i = 0; i < ARRAY_SIZE(channel_table); i++)
1341                        if (priv->reg_domain == channel_table[i].reg_domain)
1342                                break;
1343                if (i == ARRAY_SIZE(channel_table)) {
1344                        priv->reg_domain = REG_DOMAIN_MKK1;
1345                        printk(KERN_ALERT "%s: failed to get regulatory domain: assuming MKK1.\n", dev->name);
1346                }
1347        }
1348
1349        if ((channel = atmel_validate_channel(priv, priv->channel)))
1350                priv->channel = channel;
1351
1352        /* this moves station_state on.... */
1353        atmel_scan(priv, 1);
1354
1355        atmel_set_gcr(priv->dev, GCR_ENINT); /* enable interrupts */
1356        return 0;
1357}
1358
1359static int atmel_close(struct net_device *dev)
1360{
1361        struct atmel_private *priv = netdev_priv(dev);
1362
1363        /* Send event to userspace that we are disassociating */
1364        if (priv->station_state == STATION_STATE_READY) {
1365                union iwreq_data wrqu;
1366
1367                wrqu.data.length = 0;
1368                wrqu.data.flags = 0;
1369                wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1370                memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
1371                wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
1372        }
1373
1374        atmel_enter_state(priv, STATION_STATE_DOWN);
1375
1376        if (priv->bus_type == BUS_TYPE_PCCARD)
1377                atmel_write16(dev, GCR, 0x0060);
1378        atmel_write16(dev, GCR, 0x0040);
1379        return 0;
1380}
1381
1382static int atmel_validate_channel(struct atmel_private *priv, int channel)
1383{
1384        /* check that channel is OK, if so return zero,
1385           else return suitable default channel */
1386        int i;
1387
1388        for (i = 0; i < ARRAY_SIZE(channel_table); i++)
1389                if (priv->reg_domain == channel_table[i].reg_domain) {
1390                        if (channel >= channel_table[i].min &&
1391                            channel <= channel_table[i].max)
1392                                return 0;
1393                        else
1394                                return channel_table[i].min;
1395                }
1396        return 0;
1397}
1398
1399static int atmel_proc_output (char *buf, struct atmel_private *priv)
1400{
1401        int i;
1402        char *p = buf;
1403        char *s, *r, *c;
1404
1405        p += sprintf(p, "Driver version:\t\t%d.%d\n",
1406                     DRIVER_MAJOR, DRIVER_MINOR);
1407
1408        if (priv->station_state != STATION_STATE_DOWN) {
1409                p += sprintf(p, "Firmware version:\t%d.%d build %d\n"
1410                                "Firmware location:\t",
1411                             priv->host_info.major_version,
1412                             priv->host_info.minor_version,
1413                             priv->host_info.build_version);
1414
1415                if (priv->card_type != CARD_TYPE_EEPROM)
1416                        p += sprintf(p, "on card\n");
1417                else if (priv->firmware)
1418                        p += sprintf(p, "%s loaded by host\n",
1419                                     priv->firmware_id);
1420                else
1421                        p += sprintf(p, "%s loaded by hotplug\n",
1422                                     priv->firmware_id);
1423
1424                switch (priv->card_type) {
1425                case CARD_TYPE_PARALLEL_FLASH: c = "Parallel flash"; break;
1426                case CARD_TYPE_SPI_FLASH: c = "SPI flash\n"; break;
1427                case CARD_TYPE_EEPROM: c = "EEPROM"; break;
1428                default: c = "<unknown>";
1429                }
1430
1431                r = "<unknown>";
1432                for (i = 0; i < ARRAY_SIZE(channel_table); i++)
1433                        if (priv->reg_domain == channel_table[i].reg_domain)
1434                                r = channel_table[i].name;
1435
1436                p += sprintf(p, "MAC memory type:\t%s\n", c);
1437                p += sprintf(p, "Regulatory domain:\t%s\n", r);
1438                p += sprintf(p, "Host CRC checking:\t%s\n",
1439                             priv->do_rx_crc ? "On" : "Off");
1440                p += sprintf(p, "WPA-capable firmware:\t%s\n",
1441                             priv->use_wpa ? "Yes" : "No");
1442        }
1443
1444        switch(priv->station_state) {
1445        case STATION_STATE_SCANNING: s = "Scanning"; break;
1446        case STATION_STATE_JOINNING: s = "Joining"; break;
1447        case STATION_STATE_AUTHENTICATING: s = "Authenticating"; break;
1448        case STATION_STATE_ASSOCIATING: s = "Associating"; break;
1449        case STATION_STATE_READY: s = "Ready"; break;
1450        case STATION_STATE_REASSOCIATING: s = "Reassociating"; break;
1451        case STATION_STATE_MGMT_ERROR: s = "Management error"; break;
1452        case STATION_STATE_DOWN: s = "Down"; break;
1453        default: s = "<unknown>";
1454        }
1455
1456        p += sprintf(p, "Current state:\t\t%s\n", s);
1457        return p - buf;
1458}
1459
1460static int atmel_read_proc(char *page, char **start, off_t off,
1461                           int count, int *eof, void *data)
1462{
1463        struct atmel_private *priv = data;
1464        int len = atmel_proc_output (page, priv);
1465        if (len <= off+count) *eof = 1;
1466        *start = page + off;
1467        len -= off;
1468        if (len>count) len = count;
1469        if (len<0) len = 0;
1470        return len;
1471}
1472
1473struct net_device *init_atmel_card(unsigned short irq, unsigned long port,
1474                                   const AtmelFWType fw_type,
1475                                   struct device *sys_dev,
1476                                   int (*card_present)(void *), void *card)
1477{
1478        struct proc_dir_entry *ent;
1479        struct net_device *dev;
1480        struct atmel_private *priv;
1481        int rc;
1482        DECLARE_MAC_BUF(mac);
1483
1484        /* Create the network device object. */
1485        dev = alloc_etherdev(sizeof(*priv));
1486        if (!dev) {
1487                printk(KERN_ERR "atmel: Couldn't alloc_etherdev\n");
1488                return NULL;
1489        }
1490        if (dev_alloc_name(dev, dev->name) < 0) {
1491                printk(KERN_ERR "atmel: Couldn't get name!\n");
1492                goto err_out_free;
1493        }
1494
1495        priv = netdev_priv(dev);
1496        priv->dev = dev;
1497        priv->sys_dev = sys_dev;
1498        priv->present_callback = card_present;
1499        priv->card = card;
1500        priv->firmware = NULL;
1501        priv->firmware_id[0] = '\0';
1502        priv->firmware_type = fw_type;
1503        if (firmware) /* module parameter */
1504                strcpy(priv->firmware_id, firmware);
1505        priv->bus_type = card_present ? BUS_TYPE_PCCARD : BUS_TYPE_PCI;
1506        priv->station_state = STATION_STATE_DOWN;
1507        priv->do_rx_crc = 0;
1508        /* For PCMCIA cards, some chips need CRC, some don't
1509           so we have to probe. */
1510        if (priv->bus_type == BUS_TYPE_PCCARD) {
1511                priv->probe_crc = 1;
1512                priv->crc_ok_cnt = priv->crc_ko_cnt = 0;
1513        } else
1514                priv->probe_crc = 0;
1515        priv->last_qual = jiffies;
1516        priv->last_beacon_timestamp = 0;
1517        memset(priv->frag_source, 0xff, sizeof(priv->frag_source));
1518        memset(priv->BSSID, 0, 6);
1519        priv->CurrentBSSID[0] = 0xFF; /* Initialize to something invalid.... */
1520        priv->station_was_associated = 0;
1521
1522        priv->last_survey = jiffies;
1523        priv->preamble = LONG_PREAMBLE;
1524        priv->operating_mode = IW_MODE_INFRA;
1525        priv->connect_to_any_BSS = 0;
1526        priv->config_reg_domain = 0;
1527        priv->reg_domain = 0;
1528        priv->tx_rate = 3;
1529        priv->auto_tx_rate = 1;
1530        priv->channel = 4;
1531        priv->power_mode = 0;
1532        priv->SSID[0] = '\0';
1533        priv->SSID_size = 0;
1534        priv->new_SSID_size = 0;
1535        priv->frag_threshold = 2346;
1536        priv->rts_threshold = 2347;
1537        priv->short_retry = 7;
1538        priv->long_retry = 4;
1539
1540        priv->wep_is_on = 0;
1541        priv->default_key = 0;
1542        priv->encryption_level = 0;
1543        priv->exclude_unencrypted = 0;
1544        priv->group_cipher_suite = priv->pairwise_cipher_suite = CIPHER_SUITE_NONE;
1545        priv->use_wpa = 0;
1546        memset(priv->wep_keys, 0, sizeof(priv->wep_keys));
1547        memset(priv->wep_key_len, 0, sizeof(priv->wep_key_len));
1548
1549        priv->default_beacon_period = priv->beacon_period = 100;
1550        priv->listen_interval = 1;
1551
1552        init_timer(&priv->management_timer);
1553        spin_lock_init(&priv->irqlock);
1554        spin_lock_init(&priv->timerlock);
1555        priv->management_timer.function = atmel_management_timer;
1556        priv->management_timer.data = (unsigned long) dev;
1557
1558        dev->open = atmel_open;
1559        dev->stop = atmel_close;
1560        dev->change_mtu = atmel_change_mtu;
1561        dev->set_mac_address = atmel_set_mac_address;
1562        dev->hard_start_xmit = start_tx;
1563        dev->wireless_handlers = (struct iw_handler_def *)&atmel_handler_def;
1564        dev->do_ioctl = atmel_ioctl;
1565        dev->irq = irq;
1566        dev->base_addr = port;
1567
1568        SET_NETDEV_DEV(dev, sys_dev);
1569
1570        if ((rc = request_irq(dev->irq, service_interrupt, IRQF_SHARED, dev->name, dev))) {
1571                printk(KERN_ERR "%s: register interrupt %d failed, rc %d\n", dev->name, irq, rc);
1572                goto err_out_free;
1573        }
1574
1575        if (!request_region(dev->base_addr, 32,
1576                            priv->bus_type == BUS_TYPE_PCCARD ?  "atmel_cs" : "atmel_pci")) {
1577                goto err_out_irq;
1578        }
1579
1580        if (register_netdev(dev))
1581                goto err_out_res;
1582
1583        if (!probe_atmel_card(dev)){
1584                unregister_netdev(dev);
1585                goto err_out_res;
1586        }
1587
1588        netif_carrier_off(dev);
1589
1590        ent = create_proc_read_entry ("driver/atmel", 0, NULL, atmel_read_proc, priv);
1591        if (!ent)
1592                printk(KERN_WARNING "atmel: unable to create /proc entry.\n");
1593
1594        printk(KERN_INFO "%s: Atmel at76c50x. Version %d.%d. MAC %s\n",
1595               dev->name, DRIVER_MAJOR, DRIVER_MINOR, print_mac(mac, dev->dev_addr));
1596
1597        return dev;
1598
1599err_out_res:
1600        release_region( dev->base_addr, 32);
1601err_out_irq:
1602        free_irq(dev->irq, dev);
1603err_out_free:
1604        free_netdev(dev);
1605        return NULL;
1606}
1607
1608EXPORT_SYMBOL(init_atmel_card);
1609
1610void stop_atmel_card(struct net_device *dev)
1611{
1612        struct atmel_private *priv = netdev_priv(dev);
1613
1614        /* put a brick on it... */
1615        if (priv->bus_type == BUS_TYPE_PCCARD)
1616                atmel_write16(dev, GCR, 0x0060);
1617        atmel_write16(dev, GCR, 0x0040);
1618
1619        del_timer_sync(&priv->management_timer);
1620        unregister_netdev(dev);
1621        remove_proc_entry("driver/atmel", NULL);
1622        free_irq(dev->irq, dev);
1623        kfree(priv->firmware);
1624        release_region(dev->base_addr, 32);
1625        free_netdev(dev);
1626}
1627
1628EXPORT_SYMBOL(stop_atmel_card);
1629
1630static int atmel_set_essid(struct net_device *dev,
1631                           struct iw_request_info *info,
1632                           struct iw_point *dwrq,
1633                           char *extra)
1634{
1635        struct atmel_private *priv = netdev_priv(dev);
1636
1637        /* Check if we asked for `any' */
1638        if(dwrq->flags == 0) {
1639                priv->connect_to_any_BSS = 1;
1640        } else {
1641                int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
1642
1643                priv->connect_to_any_BSS = 0;
1644
1645                /* Check the size of the string */
1646                if (dwrq->length > MAX_SSID_LENGTH)
1647                         return -E2BIG;
1648                if (index != 0)
1649                        return -EINVAL;
1650
1651                memcpy(priv->new_SSID, extra, dwrq->length);
1652                priv->new_SSID_size = dwrq->length;
1653        }
1654
1655        return -EINPROGRESS;
1656}
1657
1658static int atmel_get_essid(struct net_device *dev,
1659                           struct iw_request_info *info,
1660                           struct iw_point *dwrq,
1661                           char *extra)
1662{
1663        struct atmel_private *priv = netdev_priv(dev);
1664
1665        /* Get the current SSID */
1666        if (priv->new_SSID_size != 0) {
1667                memcpy(extra, priv->new_SSID, priv->new_SSID_size);
1668                dwrq->length = priv->new_SSID_size;
1669        } else {
1670                memcpy(extra, priv->SSID, priv->SSID_size);
1671                dwrq->length = priv->SSID_size;
1672        }
1673
1674        dwrq->flags = !priv->connect_to_any_BSS; /* active */
1675
1676        return 0;
1677}
1678
1679static int atmel_get_wap(struct net_device *dev,
1680                         struct iw_request_info *info,
1681                         struct sockaddr *awrq,
1682                         char *extra)
1683{
1684        struct atmel_private *priv = netdev_priv(dev);
1685        memcpy(awrq->sa_data, priv->CurrentBSSID, 6);
1686        awrq->sa_family = ARPHRD_ETHER;
1687
1688        return 0;
1689}
1690
1691static int atmel_set_encode(struct net_device *dev,
1692                            struct iw_request_info *info,
1693                            struct iw_point *dwrq,
1694                            char *extra)
1695{
1696        struct atmel_private *priv = netdev_priv(dev);
1697
1698        /* Basic checking: do we have a key to set ?
1699         * Note : with the new API, it's impossible to get a NULL pointer.
1700         * Therefore, we need to check a key size == 0 instead.
1701         * New version of iwconfig properly set the IW_ENCODE_NOKEY flag
1702         * when no key is present (only change flags), but older versions
1703         * don't do it. - Jean II */
1704        if (dwrq->length > 0) {
1705                int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
1706                int current_index = priv->default_key;
1707                /* Check the size of the key */
1708                if (dwrq->length > 13) {
1709                        return -EINVAL;
1710                }
1711                /* Check the index (none -> use current) */
1712                if (index < 0 || index >= 4)
1713                        index = current_index;
1714                else
1715                        priv->default_key = index;
1716                /* Set the length */
1717                if (dwrq->length > 5)
1718                        priv->wep_key_len[index] = 13;
1719                else
1720                        if (dwrq->length > 0)
1721                                priv->wep_key_len[index] = 5;
1722                        else
1723                                /* Disable the key */
1724                                priv->wep_key_len[index] = 0;
1725                /* Check if the key is not marked as invalid */
1726                if (!(dwrq->flags & IW_ENCODE_NOKEY)) {
1727                        /* Cleanup */
1728                        memset(priv->wep_keys[index], 0, 13);
1729                        /* Copy the key in the driver */
1730                        memcpy(priv->wep_keys[index], extra, dwrq->length);
1731                }
1732                /* WE specify that if a valid key is set, encryption
1733                 * should be enabled (user may turn it off later)
1734                 * This is also how "iwconfig ethX key on" works */
1735                if (index == current_index &&
1736                    priv->wep_key_len[index] > 0) {
1737                        priv->wep_is_on = 1;
1738                        priv->exclude_unencrypted = 1;
1739                        if (priv->wep_key_len[index] > 5) {
1740                                priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
1741                                priv->encryption_level = 2;
1742                        } else {
1743                                priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
1744                                priv->encryption_level = 1;
1745                        }
1746                }
1747        } else {
1748                /* Do we want to just set the transmit key index ? */
1749                int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
1750                if (index >= 0 && index < 4) {
1751                        priv->default_key = index;
1752                } else
1753                        /* Don't complain if only change the mode */
1754                        if (!(dwrq->flags & IW_ENCODE_MODE))
1755                                return -EINVAL;
1756        }
1757        /* Read the flags */
1758        if (dwrq->flags & IW_ENCODE_DISABLED) {
1759                priv->wep_is_on = 0;
1760                priv->encryption_level = 0;
1761                priv->pairwise_cipher_suite = CIPHER_SUITE_NONE;
1762        } else {
1763                priv->wep_is_on = 1;
1764                if (priv->wep_key_len[priv->default_key] > 5) {
1765                        priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
1766                        priv->encryption_level = 2;
1767                } else {
1768                        priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
1769                        priv->encryption_level = 1;
1770                }
1771        }
1772        if (dwrq->flags & IW_ENCODE_RESTRICTED)
1773                priv->exclude_unencrypted = 1;
1774        if(dwrq->flags & IW_ENCODE_OPEN)
1775                priv->exclude_unencrypted = 0;
1776
1777        return -EINPROGRESS;            /* Call commit handler */
1778}
1779
1780static int atmel_get_encode(struct net_device *dev,
1781                            struct iw_request_info *info,
1782                            struct iw_point *dwrq,
1783                            char *extra)
1784{
1785        struct atmel_private *priv = netdev_priv(dev);
1786        int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
1787
1788        if (!priv->wep_is_on)
1789                dwrq->flags = IW_ENCODE_DISABLED;
1790        else {
1791                if (priv->exclude_unencrypted)
1792                        dwrq->flags = IW_ENCODE_RESTRICTED;
1793                else
1794                        dwrq->flags = IW_ENCODE_OPEN;
1795        }
1796                /* Which key do we want ? -1 -> tx index */
1797        if (index < 0 || index >= 4)
1798                index = priv->default_key;
1799        dwrq->flags |= index + 1;
1800        /* Copy the key to the user buffer */
1801        dwrq->length = priv->wep_key_len[index];
1802        if (dwrq->length > 16) {
1803                dwrq->length=0;
1804        } else {
1805                memset(extra, 0, 16);
1806                memcpy(extra, priv->wep_keys[index], dwrq->length);
1807        }
1808
1809        return 0;
1810}
1811
1812static int atmel_set_encodeext(struct net_device *dev,
1813                            struct iw_request_info *info,
1814                            union iwreq_data *wrqu,
1815                            char *extra)
1816{
1817        struct atmel_private *priv = netdev_priv(dev);
1818        struct iw_point *encoding = &wrqu->encoding;
1819        struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
1820        int idx, key_len, alg = ext->alg, set_key = 1;
1821
1822        /* Determine and validate the key index */
1823        idx = encoding->flags & IW_ENCODE_INDEX;
1824        if (idx) {
1825                if (idx < 1 || idx > WEP_KEYS)
1826                        return -EINVAL;
1827                idx--;
1828        } else
1829                idx = priv->default_key;
1830
1831        if (encoding->flags & IW_ENCODE_DISABLED)
1832            alg = IW_ENCODE_ALG_NONE;
1833
1834        if (ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY) {
1835                priv->default_key = idx;
1836                set_key = ext->key_len > 0 ? 1 : 0;
1837        }
1838
1839        if (set_key) {
1840                /* Set the requested key first */
1841                switch (alg) {
1842                case IW_ENCODE_ALG_NONE:
1843                        priv->wep_is_on = 0;
1844                        priv->encryption_level = 0;
1845                        priv->pairwise_cipher_suite = CIPHER_SUITE_NONE;
1846                        break;
1847                case IW_ENCODE_ALG_WEP:
1848                        if (ext->key_len > 5) {
1849                                priv->wep_key_len[idx] = 13;
1850                                priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
1851                                priv->encryption_level = 2;
1852                        } else if (ext->key_len > 0) {
1853                                priv->wep_key_len[idx] = 5;
1854                                priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
1855                                priv->encryption_level = 1;
1856                        } else {
1857                                return -EINVAL;
1858                        }
1859                        priv->wep_is_on = 1;
1860                        memset(priv->wep_keys[idx], 0, 13);
1861                        key_len = min ((int)ext->key_len, priv->wep_key_len[idx]);
1862                        memcpy(priv->wep_keys[idx], ext->key, key_len);
1863                        break;
1864                default:
1865                        return -EINVAL;
1866                }
1867        }
1868
1869        return -EINPROGRESS;
1870}
1871
1872static int atmel_get_encodeext(struct net_device *dev,
1873                            struct iw_request_info *info,
1874                            union iwreq_data *wrqu,
1875                            char *extra)
1876{
1877        struct atmel_private *priv = netdev_priv(dev);
1878        struct iw_point *encoding = &wrqu->encoding;
1879        struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
1880        int idx, max_key_len;
1881
1882        max_key_len = encoding->length - sizeof(*ext);
1883        if (max_key_len < 0)
1884                return -EINVAL;
1885
1886        idx = encoding->flags & IW_ENCODE_INDEX;
1887        if (idx) {
1888                if (idx < 1 || idx > WEP_KEYS)
1889                        return -EINVAL;
1890                idx--;
1891        } else
1892                idx = priv->default_key;
1893
1894        encoding->flags = idx + 1;
1895        memset(ext, 0, sizeof(*ext));
1896
1897        if (!priv->wep_is_on) {
1898                ext->alg = IW_ENCODE_ALG_NONE;
1899                ext->key_len = 0;
1900                encoding->flags |= IW_ENCODE_DISABLED;
1901        } else {
1902                if (priv->encryption_level > 0)
1903                        ext->alg = IW_ENCODE_ALG_WEP;
1904                else
1905                        return -EINVAL;
1906
1907                ext->key_len = priv->wep_key_len[idx];
1908                memcpy(ext->key, priv->wep_keys[idx], ext->key_len);
1909                encoding->flags |= IW_ENCODE_ENABLED;
1910        }
1911
1912        return 0;
1913}
1914
1915static int atmel_set_auth(struct net_device *dev,
1916                               struct iw_request_info *info,
1917                               union iwreq_data *wrqu, char *extra)
1918{
1919        struct atmel_private *priv = netdev_priv(dev);
1920        struct iw_param *param = &wrqu->param;
1921
1922        switch (param->flags & IW_AUTH_INDEX) {
1923        case IW_AUTH_WPA_VERSION:
1924        case IW_AUTH_CIPHER_PAIRWISE:
1925        case IW_AUTH_CIPHER_GROUP:
1926        case IW_AUTH_KEY_MGMT:
1927        case IW_AUTH_RX_UNENCRYPTED_EAPOL:
1928        case IW_AUTH_PRIVACY_INVOKED:
1929                /*
1930                 * atmel does not use these parameters
1931                 */
1932                break;
1933
1934        case IW_AUTH_DROP_UNENCRYPTED:
1935                priv->exclude_unencrypted = param->value ? 1 : 0;
1936                break;
1937
1938        case IW_AUTH_80211_AUTH_ALG: {
1939                        if (param->value & IW_AUTH_ALG_SHARED_KEY) {
1940                                priv->exclude_unencrypted = 1;
1941                        } else if (param->value & IW_AUTH_ALG_OPEN_SYSTEM) {
1942                                priv->exclude_unencrypted = 0;
1943                        } else
1944                                return -EINVAL;
1945                        break;
1946                }
1947
1948        case IW_AUTH_WPA_ENABLED:
1949                /* Silently accept disable of WPA */
1950                if (param->value > 0)
1951                        return -EOPNOTSUPP;
1952                break;
1953
1954        default:
1955                return -EOPNOTSUPP;
1956        }
1957        return -EINPROGRESS;
1958}
1959
1960static int atmel_get_auth(struct net_device *dev,
1961                               struct iw_request_info *info,
1962                               union iwreq_data *wrqu, char *extra)
1963{
1964        struct atmel_private *priv = netdev_priv(dev);
1965        struct iw_param *param = &wrqu->param;
1966
1967        switch (param->flags & IW_AUTH_INDEX) {
1968        case IW_AUTH_DROP_UNENCRYPTED:
1969                param->value = priv->exclude_unencrypted;
1970                break;
1971
1972        case IW_AUTH_80211_AUTH_ALG:
1973                if (priv->exclude_unencrypted == 1)
1974                        param->value = IW_AUTH_ALG_SHARED_KEY;
1975                else
1976                        param->value = IW_AUTH_ALG_OPEN_SYSTEM;
1977                break;
1978
1979        case IW_AUTH_WPA_ENABLED:
1980                param->value = 0;
1981                break;
1982
1983        default:
1984                return -EOPNOTSUPP;
1985        }
1986        return 0;
1987}
1988
1989
1990static int atmel_get_name(struct net_device *dev,
1991                          struct iw_request_info *info,
1992                          char *cwrq,
1993                          char *extra)
1994{
1995        strcpy(cwrq, "IEEE 802.11-DS");
1996        return 0;
1997}
1998
1999static int atmel_set_rate(struct net_device *dev,
2000                          struct iw_request_info *info,

2001                          struct iw_param *vwrq,
2002                          char *extra)
2003{
2004        struct atmel_private *priv = netdev_priv(dev);
2005
2006        if (vwrq->fixed == 0) {
2007                priv->tx_rate = 3;
2008                priv->auto_tx_rate = 1;
2009        } else {
2010                priv->auto_tx_rate = 0;
2011
2012                /* Which type of value ? */
2013                if ((vwrq->value < 4) && (vwrq->value >= 0)) {
2014                        /* Setting by rate index */
2015                        priv->tx_rate = vwrq->value;
2016                } else {
2017                /* Setting by frequency value */
2018                        switch (vwrq->value) {
2019                        case  1000000: priv->tx_rate = 0; break;
2020                        case  2000000: priv->tx_rate = 1; break;
2021                        case  5500000: priv->tx_rate = 2; break;
2022                        case 11000000: priv->tx_rate = 3; break;
2023                        default: return -EINVAL;
2024                        }
2025                }
2026        }
2027
2028        return -EINPROGRESS;
2029}
2030
2031static int atmel_set_mode(struct net_device *dev,
2032                          struct iw_request_info *info,
2033                          __u32 *uwrq,
2034                          char *extra)
2035{
2036        struct atmel_private *priv = netdev_priv(dev);
2037
2038        if (*uwrq != IW_MODE_ADHOC && *uwrq != IW_MODE_INFRA)
2039                return -EINVAL;
2040
2041        priv->operating_mode = *uwrq;
2042        return -EINPROGRESS;
2043}
2044
2045static int atmel_get_mode(struct net_device *dev,
2046                          struct iw_request_info *info,
2047                          __u32 *uwrq,
2048                          char *extra)
2049{
2050        struct atmel_private *priv = netdev_priv(dev);
2051
2052        *uwrq = priv->operating_mode;
2053        return 0;
2054}
2055
2056static int atmel_get_rate(struct net_device *dev,
2057                         struct iw_request_info *info,
2058                         struct iw_param *vwrq,
2059                         char *extra)
2060{
2061        struct atmel_private *priv = netdev_priv(dev);
2062
2063        if (priv->auto_tx_rate) {
2064                vwrq->fixed = 0;
2065                vwrq->value = 11000000;
2066        } else {
2067                vwrq->fixed = 1;
2068                switch(priv->tx_rate) {
2069                case 0: vwrq->value =  1000000; break;
2070                case 1: vwrq->value =  2000000; break;
2071                case 2: vwrq->value =  5500000; break;
2072                case 3: vwrq->value = 11000000; break;
2073                }
2074        }
2075        return 0;
2076}
2077
2078static int atmel_set_power(struct net_device *dev,
2079                           struct iw_request_info *info,
2080                           struct iw_param *vwrq,
2081                           char *extra)
2082{
2083        struct atmel_private *priv = netdev_priv(dev);
2084        priv->power_mode = vwrq->disabled ? 0 : 1;
2085        return -EINPROGRESS;
2086}
2087
2088static int atmel_get_power(struct net_device *dev,
2089                           struct iw_request_info *info,
2090                           struct iw_param *vwrq,
2091                           char *extra)
2092{
2093        struct atmel_private *priv = netdev_priv(dev);
2094        vwrq->disabled = priv->power_mode ? 0 : 1;
2095        vwrq->flags = IW_POWER_ON;
2096        return 0;
2097}
2098
2099static int atmel_set_retry(struct net_device *dev,
2100                           struct iw_request_info *info,
2101                           struct iw_param *vwrq,
2102                           char *extra)
2103{
2104        struct atmel_private *priv = netdev_priv(dev);
2105
2106        if (!vwrq->disabled && (vwrq->flags & IW_RETRY_LIMIT)) {
2107                if (vwrq->flags & IW_RETRY_LONG)
2108                        priv->long_retry = vwrq->value;
2109                else if (vwrq->flags & IW_RETRY_SHORT)
2110                        priv->short_retry = vwrq->value;
2111                else {
2112                        /* No modifier : set both */
2113                        priv->long_retry = vwrq->value;
2114                        priv->short_retry = vwrq->value;
2115                }
2116                return -EINPROGRESS;
2117        }
2118
2119        return -EINVAL;
2120}
2121
2122static int atmel_get_retry(struct net_device *dev,
2123                           struct iw_request_info *info,
2124                           struct iw_param *vwrq,
2125                           char *extra)
2126{
2127        struct atmel_private *priv = netdev_priv(dev);
2128
2129        vwrq->disabled = 0;      /* Can't be disabled */
2130
2131        /* Note : by default, display the short retry number */
2132        if (vwrq->flags & IW_RETRY_LONG) {
2133                vwrq->flags = IW_RETRY_LIMIT | IW_RETRY_LONG;
2134                vwrq->value = priv->long_retry;
2135        } else {
2136                vwrq->flags = IW_RETRY_LIMIT;
2137                vwrq->value = priv->short_retry;
2138                if (priv->long_retry != priv->short_retry)
2139                        vwrq->flags |= IW_RETRY_SHORT;
2140        }
2141
2142        return 0;
2143}
2144
2145static int atmel_set_rts(struct net_device *dev,
2146                         struct iw_request_info *info,
2147                         struct iw_param *vwrq,
2148                         char *extra)
2149{
2150        struct atmel_private *priv = netdev_priv(dev);
2151        int rthr = vwrq->value;
2152
2153        if (vwrq->disabled)
2154                rthr = 2347;
2155        if ((rthr < 0) || (rthr > 2347)) {
2156                return -EINVAL;
2157        }
2158        priv->rts_threshold = rthr;
2159
2160        return -EINPROGRESS;            /* Call commit handler */
2161}
2162
2163static int atmel_get_rts(struct net_device *dev,
2164                         struct iw_request_info *info,
2165                         struct iw_param *vwrq,
2166                         char *extra)
2167{
2168        struct atmel_private *priv = netdev_priv(dev);
2169
2170        vwrq->value = priv->rts_threshold;
2171        vwrq->disabled = (vwrq->value >= 2347);
2172        vwrq->fixed = 1;
2173
2174        return 0;
2175}
2176
2177static int atmel_set_frag(struct net_device *dev,
2178                          struct iw_request_info *info,
2179                          struct iw_param *vwrq,
2180                          char *extra)
2181{
2182        struct atmel_private *priv = netdev_priv(dev);
2183        int fthr = vwrq->value;
2184
2185        if (vwrq->disabled)
2186                fthr = 2346;
2187        if ((fthr < 256) || (fthr > 2346)) {
2188                return -EINVAL;
2189        }
2190        fthr &= ~0x1;   /* Get an even value - is it really needed ??? */
2191        priv->frag_threshold = fthr;
2192
2193        return -EINPROGRESS;            /* Call commit handler */
2194}
2195
2196static int atmel_get_frag(struct net_device *dev,
2197                          struct iw_request_info *info,
2198                          struct iw_param *vwrq,
2199                          char *extra)
2200{
2201        struct atmel_private *priv = netdev_priv(dev);
2202
2203        vwrq->value = priv->frag_threshold;
2204        vwrq->disabled = (vwrq->value >= 2346);
2205        vwrq->fixed = 1;
2206
2207        return 0;
2208}
2209
2210static const long frequency_list[] = { 2412, 2417, 2422, 2427, 2432, 2437, 2442,
2211                                2447, 2452, 2457, 2462, 2467, 2472, 2484 };
2212
2213static int atmel_set_freq(struct net_device *dev,
2214                          struct iw_request_info *info,
2215                          struct iw_freq *fwrq,
2216                          char *extra)
2217{
2218        struct atmel_private *priv = netdev_priv(dev);
2219        int rc = -EINPROGRESS;          /* Call commit handler */
2220
2221        /* If setting by frequency, convert to a channel */
2222        if ((fwrq->e == 1) &&
2223            (fwrq->m >= (int) 241200000) &&
2224            (fwrq->m <= (int) 248700000)) {
2225                int f = fwrq->m / 100000;
2226                int c = 0;
2227                while ((c < 14) && (f != frequency_list[c]))
2228                        c++;
2229                /* Hack to fall through... */
2230                fwrq->e = 0;
2231                fwrq->m = c + 1;
2232        }
2233        /* Setting by channel number */
2234        if ((fwrq->m > 1000) || (fwrq->e > 0))
2235                rc = -EOPNOTSUPP;
2236        else {
2237                int channel = fwrq->m;
2238                if (atmel_validate_channel(priv, channel) == 0) {
2239                        priv->channel = channel;
2240                } else {
2241                        rc = -EINVAL;
2242                }
2243        }
2244        return rc;
2245}
2246
2247static int atmel_get_freq(struct net_device *dev,
2248                          struct iw_request_info *info,
2249                          struct iw_freq *fwrq,
2250                          char *extra)
2251{
2252        struct atmel_private *priv = netdev_priv(dev);
2253
2254        fwrq->m = priv->channel;
2255        fwrq->e = 0;
2256        return 0;
2257}
2258
2259static int atmel_set_scan(struct net_device *dev,
2260                          struct iw_request_info *info,
2261                          struct iw_point *dwrq,
2262                          char *extra)
2263{
2264        struct atmel_private *priv = netdev_priv(dev);
2265        unsigned long flags;
2266
2267        /* Note : you may have realised that, as this is a SET operation,
2268         * this is privileged and therefore a normal user can't
2269         * perform scanning.
2270         * This is not an error, while the device perform scanning,
2271         * traffic doesn't flow, so it's a perfect DoS...
2272         * Jean II */
2273
2274        if (priv->station_state == STATION_STATE_DOWN)
2275                return -EAGAIN;
2276
2277        /* Timeout old surveys. */
2278        if (time_after(jiffies, priv->last_survey + 20 * HZ))
2279                priv->site_survey_state = SITE_SURVEY_IDLE;
2280        priv->last_survey = jiffies;
2281
2282        /* Initiate a scan command */
2283        if (priv->site_survey_state == SITE_SURVEY_IN_PROGRESS)
2284                return -EBUSY;
2285
2286        del_timer_sync(&priv->management_timer);
2287        spin_lock_irqsave(&priv->irqlock, flags);
2288
2289        priv->site_survey_state = SITE_SURVEY_IN_PROGRESS;
2290        priv->fast_scan = 0;
2291        atmel_scan(priv, 0);
2292        spin_unlock_irqrestore(&priv->irqlock, flags);
2293
2294        return 0;
2295}
2296
2297static int atmel_get_scan(struct net_device *dev,
2298                          struct iw_request_info *info,
2299                          struct iw_point *dwrq,
2300                          char *extra)
2301{
2302        struct atmel_private *priv = netdev_priv(dev);
2303        int i;
2304        char *current_ev = extra;
2305        struct iw_event iwe;
2306
2307        if (priv->site_survey_state != SITE_SURVEY_COMPLETED)
2308                return -EAGAIN;
2309
2310        for (i = 0; i < priv->BSS_list_entries; i++) {
2311                iwe.cmd = SIOCGIWAP;
2312                iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2313                memcpy(iwe.u.ap_addr.sa_data, priv->BSSinfo[i].BSSID, 6);
2314                current_ev = iwe_stream_add_event(info, current_ev,
2315                                                  extra + IW_SCAN_MAX_DATA,
2316                                                  &iwe, IW_EV_ADDR_LEN);
2317
2318                iwe.u.data.length =  priv->BSSinfo[i].SSIDsize;
2319                if (iwe.u.data.length > 32)
2320                        iwe.u.data.length = 32;
2321                iwe.cmd = SIOCGIWESSID;
2322                iwe.u.data.flags = 1;
2323                current_ev = iwe_stream_add_point(info, current_ev,
2324                                                  extra + IW_SCAN_MAX_DATA,
2325                                                  &iwe, priv->BSSinfo[i].SSID);
2326
2327                iwe.cmd = SIOCGIWMODE;
2328                iwe.u.mode = priv->BSSinfo[i].BSStype;
2329                current_ev = iwe_stream_add_event(info, current_ev,
2330                                                  extra + IW_SCAN_MAX_DATA,
2331                                                  &iwe, IW_EV_UINT_LEN);
2332
2333                iwe.cmd = SIOCGIWFREQ;
2334                iwe.u.freq.m = priv->BSSinfo[i].channel;
2335                iwe.u.freq.e = 0;
2336                current_ev = iwe_stream_add_event(info, current_ev,
2337                                                  extra + IW_SCAN_MAX_DATA,
2338                                                  &iwe, IW_EV_FREQ_LEN);
2339
2340                /* Add quality statistics */
2341                iwe.cmd = IWEVQUAL;
2342                iwe.u.qual.level = priv->BSSinfo[i].RSSI;
2343                iwe.u.qual.qual  = iwe.u.qual.level;
2344                /* iwe.u.qual.noise  = SOMETHING */
2345                current_ev = iwe_stream_add_event(info, current_ev,
2346                                                  extra + IW_SCAN_MAX_DATA,
2347                                                  &iwe, IW_EV_QUAL_LEN);
2348
2349
2350                iwe.cmd = SIOCGIWENCODE;
2351                if (priv->BSSinfo[i].UsingWEP)
2352                        iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2353                else
2354                        iwe.u.data.flags = IW_ENCODE_DISABLED;
2355                iwe.u.data.length = 0;
2356                current_ev = iwe_stream_add_point(info, current_ev,
2357                                                  extra + IW_SCAN_MAX_DATA,
2358                                                  &iwe, NULL);
2359        }
2360
2361        /* Length of data */
2362        dwrq->length = (current_ev - extra);
2363        dwrq->flags = 0;
2364
2365        return 0;
2366}
2367
2368static int atmel_get_range(struct net_device *dev,
2369                           struct iw_request_info *info,
2370                           struct iw_point *dwrq,
2371                           char *extra)
2372{
2373        struct atmel_private *priv = netdev_priv(dev);
2374        struct iw_range *range = (struct iw_range *) extra;
2375        int k, i, j;
2376
2377        dwrq->length = sizeof(struct iw_range);
2378        memset(range, 0, sizeof(struct iw_range));
2379        range->min_nwid = 0x0000;
2380        range->max_nwid = 0x0000;
2381        range->num_channels = 0;
2382        for (j = 0; j < ARRAY_SIZE(channel_table); j++)
2383                if (priv->reg_domain == channel_table[j].reg_domain) {
2384                        range->num_channels = channel_table[j].max - channel_table[j].min + 1;
2385                        break;
2386                }
2387        if (range->num_channels != 0) {
2388                for (k = 0, i = channel_table[j].min; i <= channel_table[j].max; i++) {
2389                        range->freq[k].i = i; /* List index */
2390                        range->freq[k].m = frequency_list[i - 1] * 100000;
2391                        range->freq[k++].e = 1; /* Values in table in MHz -> * 10^5 * 10 */
2392                }
2393                range->num_frequency = k;
2394        }
2395
2396        range->max_qual.qual = 100;
2397        range->max_qual.level = 100;
2398        range->max_qual.noise = 0;
2399        range->max_qual.updated = IW_QUAL_NOISE_INVALID;
2400
2401        range->avg_qual.qual = 50;
2402        range->avg_qual.level = 50;
2403        range->avg_qual.noise = 0;
2404        range->avg_qual.updated = IW_QUAL_NOISE_INVALID;
2405
2406        range->sensitivity = 0;
2407
2408        range->bitrate[0] =  1000000;
2409        range->bitrate[1] =  2000000;
2410        range->bitrate[2] =  5500000;
2411        range->bitrate[3] = 11000000;
2412        range->num_bitrates = 4;
2413
2414        range->min_rts = 0;
2415        range->max_rts = 2347;
2416        range->min_frag = 256;
2417        range->max_frag = 2346;
2418
2419        range->encoding_size[0] = 5;
2420        range->encoding_size[1] = 13;
2421        range->num_encoding_sizes = 2;
2422        range->max_encoding_tokens = 4;
2423
2424        range->pmp_flags = IW_POWER_ON;
2425        range->pmt_flags = IW_POWER_ON;
2426        range->pm_capa = 0;
2427
2428        range->we_version_source = WIRELESS_EXT;
2429        range->we_version_compiled = WIRELESS_EXT;
2430        range->retry_capa = IW_RETRY_LIMIT ;
2431        range->retry_flags = IW_RETRY_LIMIT;
2432        range->r_time_flags = 0;
2433        range->min_retry = 1;
2434        range->max_retry = 65535;
2435
2436        return 0;
2437}
2438
2439static int atmel_set_wap(struct net_device *dev,
2440                         struct iw_request_info *info,
2441                         struct sockaddr *awrq,
2442                         char *extra)
2443{
2444        struct atmel_private *priv = netdev_priv(dev);
2445        int i;
2446        static const u8 any[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
2447        static const u8 off[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
2448        unsigned long flags;
2449
2450        if (awrq->sa_family != ARPHRD_ETHER)
2451                return -EINVAL;
2452
2453        if (!memcmp(any, awrq->sa_data, 6) ||
2454            !memcmp(off, awrq->sa_data, 6)) {
2455                del_timer_sync(&priv->management_timer);
2456                spin_lock_irqsave(&priv->irqlock, flags);
2457                atmel_scan(priv, 1);
2458                spin_unlock_irqrestore(&priv->irqlock, flags);
2459                return 0;
2460        }
2461
2462        for (i = 0; i < priv->BSS_list_entries; i++) {
2463                if (memcmp(priv->BSSinfo[i].BSSID, awrq->sa_data, 6) == 0) {
2464                        if (!priv->wep_is_on && priv->BSSinfo[i].UsingWEP) {
2465                                return -EINVAL;
2466                        } else if  (priv->wep_is_on && !priv->BSSinfo[i].UsingWEP) {
2467                                return -EINVAL;
2468                        } else {
2469                                del_timer_sync(&priv->management_timer);
2470                                spin_lock_irqsave(&priv->irqlock, flags);
2471                                atmel_join_bss(priv, i);
2472                                spin_unlock_irqrestore(&priv->irqlock, flags);
2473                                return 0;
2474                        }
2475                }
2476        }
2477
2478        return -EINVAL;
2479}
2480
2481static int atmel_config_commit(struct net_device *dev,
2482                               struct iw_request_info *info,    /* NULL */
2483                               void *zwrq,                      /* NULL */
2484                               char *extra)                     /* NULL */
2485{
2486        return atmel_open(dev);
2487}
2488
2489static const iw_handler atmel_handler[] =
2490{
2491        (iw_handler) atmel_config_commit,       /* SIOCSIWCOMMIT */
2492        (iw_handler) atmel_get_name,            /* SIOCGIWNAME */
2493        (iw_handler) NULL,                      /* SIOCSIWNWID */
2494        (iw_handler) NULL,                      /* SIOCGIWNWID */
2495        (iw_handler) atmel_set_freq,            /* SIOCSIWFREQ */
2496        (iw_handler) atmel_get_freq,            /* SIOCGIWFREQ */
2497        (iw_handler) atmel_set_mode,            /* SIOCSIWMODE */
2498        (iw_handler) atmel_get_mode,            /* SIOCGIWMODE */
2499        (iw_handler) NULL,                      /* SIOCSIWSENS */
2500        (iw_handler) NULL,                      /* SIOCGIWSENS */
2501        (iw_handler) NULL,                      /* SIOCSIWRANGE */
2502        (iw_handler) atmel_get_range,           /* SIOCGIWRANGE */
2503        (iw_handler) NULL,                      /* SIOCSIWPRIV */
2504        (iw_handler) NULL,                      /* SIOCGIWPRIV */
2505        (iw_handler) NULL,                      /* SIOCSIWSTATS */
2506        (iw_handler) NULL,                      /* SIOCGIWSTATS */
2507        (iw_handler) NULL,                      /* SIOCSIWSPY */
2508        (iw_handler) NULL,                      /* SIOCGIWSPY */
2509        (iw_handler) NULL,                      /* -- hole -- */
2510        (iw_handler) NULL,                      /* -- hole -- */
2511        (iw_handler) atmel_set_wap,             /* SIOCSIWAP */
2512        (iw_handler) atmel_get_wap,             /* SIOCGIWAP */
2513        (iw_handler) NULL,                      /* -- hole -- */
2514        (iw_handler) NULL,                      /* SIOCGIWAPLIST */
2515        (iw_handler) atmel_set_scan,            /* SIOCSIWSCAN */
2516        (iw_handler) atmel_get_scan,            /* SIOCGIWSCAN */
2517        (iw_handler) atmel_set_essid,           /* SIOCSIWESSID */
2518        (iw_handler) atmel_get_essid,           /* SIOCGIWESSID */
2519        (iw_handler) NULL,                      /* SIOCSIWNICKN */
2520        (iw_handler) NULL,                      /* SIOCGIWNICKN */
2521        (iw_handler) NULL,                      /* -- hole -- */
2522        (iw_handler) NULL,                      /* -- hole -- */
2523        (iw_handler) atmel_set_rate,            /* SIOCSIWRATE */
2524        (iw_handler) atmel_get_rate,            /* SIOCGIWRATE */
2525        (iw_handler) atmel_set_rts,             /* SIOCSIWRTS */
2526        (iw_handler) atmel_get_rts,             /* SIOCGIWRTS */
2527        (iw_handler) atmel_set_frag,            /* SIOCSIWFRAG */
2528        (iw_handler) atmel_get_frag,            /* SIOCGIWFRAG */
2529        (iw_handler) NULL,                      /* SIOCSIWTXPOW */
2530        (iw_handler) NULL,                      /* SIOCGIWTXPOW */
2531        (iw_handler) atmel_set_retry,           /* SIOCSIWRETRY */
2532        (iw_handler) atmel_get_retry,           /* SIOCGIWRETRY */
2533        (iw_handler) atmel_set_encode,          /* SIOCSIWENCODE */
2534        (iw_handler) atmel_get_encode,          /* SIOCGIWENCODE */
2535        (iw_handler) atmel_set_power,           /* SIOCSIWPOWER */
2536        (iw_handler) atmel_get_power,           /* SIOCGIWPOWER */
2537        (iw_handler) NULL,                      /* -- hole -- */
2538        (iw_handler) NULL,                      /* -- hole -- */
2539        (iw_handler) NULL,                      /* SIOCSIWGENIE */
2540        (iw_handler) NULL,                      /* SIOCGIWGENIE */
2541        (iw_handler) atmel_set_auth,            /* SIOCSIWAUTH */
2542        (iw_handler) atmel_get_auth,            /* SIOCGIWAUTH */
2543        (iw_handler) atmel_set_encodeext,       /* SIOCSIWENCODEEXT */
2544        (iw_handler) atmel_get_encodeext,       /* SIOCGIWENCODEEXT */
2545        (iw_handler) NULL,                      /* SIOCSIWPMKSA */
2546};
2547
2548static const iw_handler atmel_private_handler[] =
2549{
2550        NULL,                           /* SIOCIWFIRSTPRIV */
2551};
2552
2553typedef struct atmel_priv_ioctl {
2554        char id[32];
2555        unsigned char __user *data;
2556        unsigned short len;
2557} atmel_priv_ioctl;
2558
2559#define ATMELFWL        SIOCIWFIRSTPRIV
2560#define ATMELIDIFC      ATMELFWL + 1
2561#define ATMELRD         ATMELFWL + 2
2562#define ATMELMAGIC 0x51807
2563#define REGDOMAINSZ 20
2564
2565static const struct iw_priv_args atmel_private_args[] = {
2566        {
2567                .cmd = ATMELFWL,
2568                .set_args = IW_PRIV_TYPE_BYTE
2569                                | IW_PRIV_SIZE_FIXED
2570                                | sizeof (atmel_priv_ioctl),
2571                .get_args = IW_PRIV_TYPE_NONE,
2572                .name = "atmelfwl"
2573        }, {
2574                .cmd = ATMELIDIFC,
2575                .set_args = IW_PRIV_TYPE_NONE,
2576                .get_args = IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1,
2577                .name = "atmelidifc"
2578        }, {
2579                .cmd = ATMELRD,
2580                .set_args = IW_PRIV_TYPE_CHAR | REGDOMAINSZ,
2581                .get_args = IW_PRIV_TYPE_NONE,
2582                .name = "regdomain"
2583        },
2584};
2585
2586static const struct iw_handler_def atmel_handler_def =
2587{
2588        .num_standard   = ARRAY_SIZE(atmel_handler),
2589        .num_private    = ARRAY_SIZE(atmel_private_handler),
2590        .num_private_args = ARRAY_SIZE(atmel_private_args),
2591        .standard       = (iw_handler *) atmel_handler,
2592        .private        = (iw_handler *) atmel_private_handler,
2593        .private_args   = (struct iw_priv_args *) atmel_private_args,
2594        .get_wireless_stats = atmel_get_wireless_stats
2595};
2596
2597static int atmel_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2598{
2599        int i, rc = 0;
2600        struct atmel_private *priv = netdev_priv(dev);
2601        atmel_priv_ioctl com;
2602        struct iwreq *wrq = (struct iwreq *) rq;
2603        unsigned char *new_firmware;
2604        char domain[REGDOMAINSZ + 1];
2605
2606        switch (cmd) {
2607        case ATMELIDIFC:
2608                wrq->u.param.value = ATMELMAGIC;
2609                break;
2610
2611        case ATMELFWL:
2612                if (copy_from_user(&com, rq->ifr_data, sizeof(com))) {
2613                        rc = -EFAULT;
2614                        break;
2615                }
2616
2617                if (!capable(CAP_NET_ADMIN)) {
2618                        rc = -EPERM;
2619                        break;
2620                }
2621
2622                if (!(new_firmware = kmalloc(com.len, GFP_KERNEL))) {
2623                        rc = -ENOMEM;
2624                        break;
2625                }
2626
2627                if (copy_from_user(new_firmware, com.data, com.len)) {
2628                        kfree(new_firmware);
2629                        rc = -EFAULT;
2630                        break;
2631                }
2632
2633                kfree(priv->firmware);
2634
2635                priv->firmware = new_firmware;
2636                priv->firmware_length = com.len;
2637                strncpy(priv->firmware_id, com.id, 31);
2638                priv->firmware_id[31] = '\0';
2639                break;
2640
2641        case ATMELRD:
2642                if (copy_from_user(domain, rq->ifr_data, REGDOMAINSZ)) {
2643                        rc = -EFAULT;
2644                        break;
2645                }
2646
2647                if (!capable(CAP_NET_ADMIN)) {
2648                        rc = -EPERM;
2649                        break;
2650                }
2651
2652                domain[REGDOMAINSZ] = 0;
2653                rc = -EINVAL;
2654                for (i = 0; i < ARRAY_SIZE(channel_table); i++) {
2655                        /* strcasecmp doesn't exist in the library */
2656                        char *a = channel_table[i].name;
2657                        char *b = domain;
2658                        while (*a) {
2659                                char c1 = *a++;
2660                                char c2 = *b++;
2661                                if (tolower(c1) != tolower(c2))
2662                                        break;
2663                        }
2664                        if (!*a && !*b) {
2665                                priv->config_reg_domain = channel_table[i].reg_domain;
2666                                rc = 0;
2667                        }
2668                }
2669
2670                if (rc == 0 &&  priv->station_state != STATION_STATE_DOWN)
2671                        rc = atmel_open(dev);
2672                break;
2673
2674        default:
2675                rc = -EOPNOTSUPP;
2676        }
2677
2678        return rc;
2679}
2680
2681struct auth_body {
2682        __le16 alg;
2683        __le16 trans_seq;
2684        __le16 status;
2685        u8 el_id;
2686        u8 chall_text_len;
2687        u8 chall_text[253];
2688};
2689
2690static void atmel_enter_state(struct atmel_private *priv, int new_state)
2691{
2692        int old_state = priv->station_state;
2693
2694        if (new_state == old_state)
2695                return;
2696
2697        priv->station_state = new_state;
2698
2699        if (new_state == STATION_STATE_READY) {
2700                netif_start_queue(priv->dev);
2701                netif_carrier_on(priv->dev);
2702        }
2703
2704        if (old_state == STATION_STATE_READY) {
2705                netif_carrier_off(priv->dev);
2706                if (netif_running(priv->dev))
2707                        netif_stop_queue(priv->dev);
2708                priv->last_beacon_timestamp = 0;
2709        }
2710}
2711
2712static void atmel_scan(struct atmel_private *priv, int specific_ssid)
2713{
2714        struct {
2715                u8 BSSID[6];
2716                u8 SSID[MAX_SSID_LENGTH];
2717                u8 scan_type;
2718                u8 channel;
2719                __le16 BSS_type;
2720                __le16 min_channel_time;
2721                __le16 max_channel_time;
2722                u8 options;
2723                u8 SSID_size;
2724        } cmd;
2725
2726        memset(cmd.BSSID, 0xff, 6);
2727
2728        if (priv->fast_scan) {
2729                cmd.SSID_size = priv->SSID_size;
2730                memcpy(cmd.SSID, priv->SSID, priv->SSID_size);
2731                cmd.min_channel_time = cpu_to_le16(10);
2732                cmd.max_channel_time = cpu_to_le16(50);
2733        } else {
2734                priv->BSS_list_entries = 0;
2735                cmd.SSID_size = 0;
2736                cmd.min_channel_time = cpu_to_le16(10);
2737                cmd.max_channel_time = cpu_to_le16(120);
2738        }
2739
2740        cmd.options = 0;
2741
2742        if (!specific_ssid)
2743                cmd.options |= SCAN_OPTIONS_SITE_SURVEY;
2744
2745        cmd.channel = (priv->channel & 0x7f);
2746        cmd.scan_type = SCAN_TYPE_ACTIVE;
2747        cmd.BSS_type = cpu_to_le16(priv->operating_mode == IW_MODE_ADHOC ?
2748                BSS_TYPE_AD_HOC : BSS_TYPE_INFRASTRUCTURE);
2749
2750        atmel_send_command(priv, CMD_Scan, &cmd, sizeof(cmd));
2751
2752        /* This must come after all hardware access to avoid being messed up
2753           by stuff happening in interrupt context after we leave STATE_DOWN */
2754        atmel_enter_state(priv, STATION_STATE_SCANNING);
2755}
2756
2757static void join(struct atmel_private *priv, int type)
2758{
2759        struct {
2760                u8 BSSID[6];
2761                u8 SSID[MAX_SSID_LENGTH];
2762                u8 BSS_type; /* this is a short in a scan command - weird */
2763                u8 channel;
2764                __le16 timeout;
2765                u8 SSID_size;
2766                u8 reserved;
2767        } cmd;
2768
2769        cmd.SSID_size = priv->SSID_size;
2770        memcpy(cmd.SSID, priv->SSID, priv->SSID_size);
2771        memcpy(cmd.BSSID, priv->CurrentBSSID, 6);
2772        cmd.channel = (priv->channel & 0x7f);
2773        cmd.BSS_type = type;
2774        cmd.timeout = cpu_to_le16(2000);
2775
2776        atmel_send_command(priv, CMD_Join, &cmd, sizeof(cmd));
2777}
2778
2779static void start(struct atmel_private *priv, int type)
2780{
2781        struct {
2782                u8 BSSID[6];
2783                u8 SSID[MAX_SSID_LENGTH];
2784                u8 BSS_type;
2785                u8 channel;
2786                u8 SSID_size;
2787                u8 reserved[3];
2788        } cmd;
2789
2790        cmd.SSID_size = priv->SSID_size;
2791        memcpy(cmd.SSID, priv->SSID, priv->SSID_size);
2792        memcpy(cmd.BSSID, priv->BSSID, 6);
2793        cmd.BSS_type = type;
2794        cmd.channel = (priv->channel & 0x7f);
2795
2796        atmel_send_command(priv, CMD_Start, &cmd, sizeof(cmd));
2797}
2798
2799static void handle_beacon_probe(struct atmel_private *priv, u16 capability,
2800                                u8 channel)
2801{
2802        int rejoin = 0;
2803        int new = capability & MFIE_TYPE_POWER_CONSTRAINT ?
2804                SHORT_PREAMBLE : LONG_PREAMBLE;
2805
2806        if (priv->preamble != new) {
2807                priv->preamble = new;
2808                rejoin = 1;
2809                atmel_set_mib8(priv, Local_Mib_Type, LOCAL_MIB_PREAMBLE_TYPE, new);
2810        }
2811
2812        if (priv->channel != channel) {
2813                priv->channel = channel;
2814                rejoin = 1;
2815                atmel_set_mib8(priv, Phy_Mib_Type, PHY_MIB_CHANNEL_POS, channel);
2816        }
2817
2818        if (rejoin) {
2819                priv->station_is_associated = 0;
2820                atmel_enter_state(priv, STATION_STATE_JOINNING);
2821
2822                if (priv->operating_mode == IW_MODE_INFRA)
2823                        join(priv, BSS_TYPE_INFRASTRUCTURE);
2824                else
2825                        join(priv, BSS_TYPE_AD_HOC);
2826        }
2827}
2828
2829static void send_authentication_request(struct atmel_private *priv, u16 system,
2830                                        u8 *challenge, int challenge_len)
2831{
2832        struct ieee80211_hdr_4addr header;
2833        struct auth_body auth;
2834
2835        header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH);
2836        header.duration_id = cpu_to_le16(0x8000);
2837        header.seq_ctl = 0;
2838        memcpy(header.addr1, priv->CurrentBSSID, 6);
2839        memcpy(header.addr2, priv->dev->dev_addr, 6);
2840        memcpy(header.addr3, priv->CurrentBSSID, 6);
2841
2842        if (priv->wep_is_on && priv->CurrentAuthentTransactionSeqNum != 1)
2843                /* no WEP for authentication frames with TrSeqNo 1 */
2844                header.frame_ctl |=  cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2845
2846        auth.alg = cpu_to_le16(system);
2847
2848        auth.status = 0;
2849        auth.trans_seq = cpu_to_le16(priv->CurrentAuthentTransactionSeqNum);
2850        priv->ExpectedAuthentTransactionSeqNum = priv->CurrentAuthentTransactionSeqNum+1;
2851        priv->CurrentAuthentTransactionSeqNum += 2;
2852
2853        if (challenge_len != 0) {
2854                auth.el_id = 16; /* challenge_text */
2855                auth.chall_text_len = challenge_len;
2856                memcpy(auth.chall_text, challenge, challenge_len);
2857                atmel_transmit_management_frame(priv, &header, (u8 *)&auth, 8 + challenge_len);
2858        } else {
2859                atmel_transmit_management_frame(priv, &header, (u8 *)&auth, 6);
2860        }
2861}
2862
2863static void send_association_request(struct atmel_private *priv, int is_reassoc)
2864{
2865        u8 *ssid_el_p;
2866        int bodysize;
2867        struct ieee80211_hdr_4addr header;
2868        struct ass_req_format {
2869                __le16 capability;
2870                __le16 listen_interval;
2871                u8 ap[6]; /* nothing after here directly accessible */
2872                u8 ssid_el_id;
2873                u8 ssid_len;
2874                u8 ssid[MAX_SSID_LENGTH];
2875                u8 sup_rates_el_id;
2876                u8 sup_rates_len;
2877                u8 rates[4];
2878        } body;
2879
2880        header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2881                (is_reassoc ? IEEE80211_STYPE_REASSOC_REQ : IEEE80211_STYPE_ASSOC_REQ));
2882        header.duration_id = cpu_to_le16(0x8000);
2883        header.seq_ctl = 0;
2884
2885        memcpy(header.addr1, priv->CurrentBSSID, 6);
2886        memcpy(header.addr2, priv->dev->dev_addr, 6);
2887        memcpy(header.addr3, priv->CurrentBSSID, 6);
2888
2889        body.capability = cpu_to_le16(WLAN_CAPABILITY_ESS);
2890        if (priv->wep_is_on)
2891                body.capability |= cpu_to_le16(WLAN_CAPABILITY_PRIVACY);
2892        if (priv->preamble == SHORT_PREAMBLE)
2893                body.capability |= cpu_to_le16(MFIE_TYPE_POWER_CONSTRAINT);
2894
2895        body.listen_interval = cpu_to_le16(priv->listen_interval * priv->beacon_period);
2896
2897        /* current AP address - only in reassoc frame */
2898        if (is_reassoc) {
2899                memcpy(body.ap, priv->CurrentBSSID, 6);
2900                ssid_el_p = (u8 *)&body.ssid_el_id;
2901                bodysize = 18 + priv->SSID_size;
2902        } else {
2903                ssid_el_p = (u8 *)&body.ap[0];
2904                bodysize = 12 + priv->SSID_size;
2905        }
2906
2907        ssid_el_p[0] = MFIE_TYPE_SSID;
2908        ssid_el_p[1] = priv->SSID_size;
2909        memcpy(ssid_el_p + 2, priv->SSID, priv->SSID_size);
2910        ssid_el_p[2 + priv->SSID_size] = MFIE_TYPE_RATES;
2911        ssid_el_p[3 + priv->SSID_size] = 4; /* len of suported rates */
2912        memcpy(ssid_el_p + 4 + priv->SSID_size, atmel_basic_rates, 4);
2913
2914        atmel_transmit_management_frame(priv, &header, (void *)&body, bodysize);
2915}
2916
2917static int is_frame_from_current_bss(struct atmel_private *priv,
2918                                     struct ieee80211_hdr_4addr *header)
2919{
2920        if (le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_FROMDS)
2921                return memcmp(header->addr3, priv->CurrentBSSID, 6) == 0;
2922        else
2923                return memcmp(header->addr2, priv->CurrentBSSID, 6) == 0;
2924}
2925
2926static int retrieve_bss(struct atmel_private *priv)
2927{
2928        int i;
2929        int max_rssi = -128;
2930        int max_index = -1;
2931
2932        if (priv->BSS_list_entries == 0)
2933                return -1;
2934
2935        if (priv->connect_to_any_BSS) {
2936                /* Select a BSS with the max-RSSI but of the same type and of
2937                   the same WEP mode and that it is not marked as 'bad' (i.e.
2938                   we had previously failed to connect to this BSS with the
2939                   settings that we currently use) */
2940                priv->current_BSS = 0;
2941                for (i = 0; i < priv->BSS_list_entries; i++) {
2942                        if (priv->operating_mode == priv->BSSinfo[i].BSStype &&
2943                            ((!priv->wep_is_on && !priv->BSSinfo[i].UsingWEP) ||
2944                             (priv->wep_is_on && priv->BSSinfo[i].UsingWEP)) &&
2945                            !(priv->BSSinfo[i].channel & 0x80)) {
2946                                max_rssi = priv->BSSinfo[i].RSSI;
2947                                priv->current_BSS = max_index = i;
2948                        }
2949                }
2950                return max_index;
2951        }
2952
2953        for (i = 0; i < priv->BSS_list_entries; i++) {
2954                if (priv->SSID_size == priv->BSSinfo[i].SSIDsize &&
2955                    memcmp(priv->SSID, priv->BSSinfo[i].SSID, priv->SSID_size) == 0 &&
2956                    priv->operating_mode == priv->BSSinfo[i].BSStype &&
2957                    atmel_validate_channel(priv, priv->BSSinfo[i].channel) == 0) {
2958                        if (priv->BSSinfo[i].RSSI >= max_rssi) {
2959                                max_rssi = priv->BSSinfo[i].RSSI;
2960                                max_index = i;
2961                        }
2962                }
2963        }
2964        return max_index;
2965}
2966
2967static void store_bss_info(struct atmel_private *priv,
2968                           struct ieee80211_hdr_4addr *header, u16 capability,
2969                           u16 beacon_period, u8 channel, u8 rssi, u8 ssid_len,
2970                           u8 *ssid, int is_beacon)
2971{
2972        u8 *bss = capability & WLAN_CAPABILITY_ESS ? header->addr2 : header->addr3;
2973        int i, index;
2974
2975        for (index = -1, i = 0; i < priv->BSS_list_entries; i++)
2976                if (memcmp(bss, priv->BSSinfo[i].BSSID, 6) == 0)
2977                        index = i;
2978
2979        /* If we process a probe and an entry from this BSS exists
2980           we will update the BSS entry with the info from this BSS.
2981           If we process a beacon we will only update RSSI */
2982
2983        if (index == -1) {
2984                if (priv->BSS_list_entries == MAX_BSS_ENTRIES)
2985                        return;
2986                index = priv->BSS_list_entries++;
2987                memcpy(priv->BSSinfo[index].BSSID, bss, 6);
2988                priv->BSSinfo[index].RSSI = rssi;
2989        } else {
2990                if (rssi > priv->BSSinfo[index].RSSI)
2991                        priv->BSSinfo[index].RSSI = rssi;
2992                if (is_beacon)
2993                        return;
2994        }
2995
2996        priv->BSSinfo[index].channel = channel;
2997        priv->BSSinfo[index].beacon_period = beacon_period;
2998        priv->BSSinfo[index].UsingWEP = capability & WLAN_CAPABILITY_PRIVACY;
2999        memcpy(priv->BSSinfo[index].SSID, ssid, ssid_len);
3000        priv->BSSinfo[index].SSIDsize = ssid_len;

3001
3002        if (capability & WLAN_CAPABILITY_IBSS)
3003                priv->BSSinfo[index].BSStype = IW_MODE_ADHOC;
3004        else if (capability & WLAN_CAPABILITY_ESS)
3005                priv->BSSinfo[index].BSStype =IW_MODE_INFRA;
3006
3007        priv->BSSinfo[index].preamble = capability & MFIE_TYPE_POWER_CONSTRAINT ?
3008                SHORT_PREAMBLE : LONG_PREAMBLE;
3009}
3010
3011static void authenticate(struct atmel_private *priv, u16 frame_len)
3012{
3013        struct auth_body *auth = (struct auth_body *)priv->rx_buf;
3014        u16 status = le16_to_cpu(auth->status);
3015        u16 trans_seq_no = le16_to_cpu(auth->trans_seq);
3016        u16 system = le16_to_cpu(auth->alg);
3017
3018        if (status == WLAN_STATUS_SUCCESS && !priv->wep_is_on) {
3019                /* no WEP */
3020                if (priv->station_was_associated) {
3021                        atmel_enter_state(priv, STATION_STATE_REASSOCIATING);
3022                        send_association_request(priv, 1);
3023                        return;
3024                } else {
3025                        atmel_enter_state(priv, STATION_STATE_ASSOCIATING);
3026                        send_association_request(priv, 0);
3027                        return;
3028                }
3029        }
3030
3031        if (status == WLAN_STATUS_SUCCESS && priv->wep_is_on) {
3032                int should_associate = 0;
3033                /* WEP */
3034                if (trans_seq_no != priv->ExpectedAuthentTransactionSeqNum)
3035                        return;
3036
3037                if (system == WLAN_AUTH_OPEN) {
3038                        if (trans_seq_no == 0x0002) {
3039                                should_associate = 1;
3040                        }
3041                } else if (system == WLAN_AUTH_SHARED_KEY) {
3042                        if (trans_seq_no == 0x0002 &&
3043                            auth->el_id == MFIE_TYPE_CHALLENGE) {
3044                                send_authentication_request(priv, system, auth->chall_text, auth->chall_text_len);
3045                                return;
3046                        } else if (trans_seq_no == 0x0004) {
3047                                should_associate = 1;
3048                        }
3049                }
3050
3051                if (should_associate) {
3052                        if(priv->station_was_associated) {
3053                                atmel_enter_state(priv, STATION_STATE_REASSOCIATING);
3054                                send_association_request(priv, 1);
3055                                return;
3056                        } else {
3057                                atmel_enter_state(priv, STATION_STATE_ASSOCIATING);
3058                                send_association_request(priv, 0);
3059                                return;
3060                        }
3061                }
3062        }
3063
3064        if (status == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
3065                /* Flip back and forth between WEP auth modes until the max
3066                 * authentication tries has been exceeded.
3067                 */
3068                if (system == WLAN_AUTH_OPEN) {
3069                        priv->CurrentAuthentTransactionSeqNum = 0x001;
3070                        priv->exclude_unencrypted = 1;
3071                        send_authentication_request(priv, WLAN_AUTH_SHARED_KEY, NULL, 0);
3072                        return;
3073                } else if (   system == WLAN_AUTH_SHARED_KEY
3074                           && priv->wep_is_on) {
3075                        priv->CurrentAuthentTransactionSeqNum = 0x001;
3076                        priv->exclude_unencrypted = 0;
3077                        send_authentication_request(priv, WLAN_AUTH_OPEN, NULL, 0);
3078                        return;
3079                } else if (priv->connect_to_any_BSS) {
3080                        int bss_index;
3081
3082                        priv->BSSinfo[(int)(priv->current_BSS)].channel |= 0x80;
3083
3084                        if ((bss_index  = retrieve_bss(priv)) != -1) {
3085                                atmel_join_bss(priv, bss_index);
3086                                return;
3087                        }
3088                }
3089        }
3090
3091        priv->AuthenticationRequestRetryCnt = 0;
3092        atmel_enter_state(priv,  STATION_STATE_MGMT_ERROR);
3093        priv->station_is_associated = 0;
3094}
3095
3096static void associate(struct atmel_private *priv, u16 frame_len, u16 subtype)
3097{
3098        struct ass_resp_format {
3099                __le16 capability;
3100                __le16 status;
3101                __le16 ass_id;
3102                u8 el_id;
3103                u8 length;
3104                u8 rates[4];
3105        } *ass_resp = (struct ass_resp_format *)priv->rx_buf;
3106
3107        u16 status = le16_to_cpu(ass_resp->status);
3108        u16 ass_id = le16_to_cpu(ass_resp->ass_id);
3109        u16 rates_len = ass_resp->length > 4 ? 4 : ass_resp->length;
3110
3111        union iwreq_data wrqu;
3112
3113        if (frame_len < 8 + rates_len)
3114                return;
3115
3116        if (status == WLAN_STATUS_SUCCESS) {
3117                if (subtype == IEEE80211_STYPE_ASSOC_RESP)
3118                        priv->AssociationRequestRetryCnt = 0;
3119                else
3120                        priv->ReAssociationRequestRetryCnt = 0;
3121
3122                atmel_set_mib16(priv, Mac_Mgmt_Mib_Type,
3123                                MAC_MGMT_MIB_STATION_ID_POS, ass_id & 0x3fff);
3124                atmel_set_mib(priv, Phy_Mib_Type,
3125                              PHY_MIB_RATE_SET_POS, ass_resp->rates, rates_len);
3126                if (priv->power_mode == 0) {
3127                        priv->listen_interval = 1;
3128                        atmel_set_mib8(priv, Mac_Mgmt_Mib_Type,
3129                                       MAC_MGMT_MIB_PS_MODE_POS, ACTIVE_MODE);
3130                        atmel_set_mib16(priv, Mac_Mgmt_Mib_Type,
3131                                        MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 1);
3132                } else {
3133                        priv->listen_interval = 2;
3134                        atmel_set_mib8(priv, Mac_Mgmt_Mib_Type,
3135                                       MAC_MGMT_MIB_PS_MODE_POS,  PS_MODE);
3136                        atmel_set_mib16(priv, Mac_Mgmt_Mib_Type,
3137                                        MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 2);
3138                }
3139
3140                priv->station_is_associated = 1;
3141                priv->station_was_associated = 1;
3142                atmel_enter_state(priv, STATION_STATE_READY);
3143
3144                /* Send association event to userspace */
3145                wrqu.data.length = 0;
3146                wrqu.data.flags = 0;
3147                memcpy(wrqu.ap_addr.sa_data, priv->CurrentBSSID, ETH_ALEN);
3148                wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3149                wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
3150
3151                return;
3152        }
3153
3154        if (subtype == IEEE80211_STYPE_ASSOC_RESP &&
3155            status != WLAN_STATUS_ASSOC_DENIED_RATES &&
3156            status != WLAN_STATUS_CAPS_UNSUPPORTED &&
3157            priv->AssociationRequestRetryCnt < MAX_ASSOCIATION_RETRIES) {
3158                mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
3159                priv->AssociationRequestRetryCnt++;
3160                send_association_request(priv, 0);
3161                return;
3162        }
3163
3164        if (subtype == IEEE80211_STYPE_REASSOC_RESP &&
3165            status != WLAN_STATUS_ASSOC_DENIED_RATES &&
3166            status != WLAN_STATUS_CAPS_UNSUPPORTED &&
3167            priv->AssociationRequestRetryCnt < MAX_ASSOCIATION_RETRIES) {
3168                mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
3169                priv->ReAssociationRequestRetryCnt++;
3170                send_association_request(priv, 1);
3171                return;
3172        }
3173
3174        atmel_enter_state(priv,  STATION_STATE_MGMT_ERROR);
3175        priv->station_is_associated = 0;
3176
3177        if (priv->connect_to_any_BSS) {
3178                int bss_index;
3179                priv->BSSinfo[(int)(priv->current_BSS)].channel |= 0x80;
3180
3181                if ((bss_index = retrieve_bss(priv)) != -1)
3182                        atmel_join_bss(priv, bss_index);
3183        }
3184}
3185
3186void atmel_join_bss(struct atmel_private *priv, int bss_index)
3187{
3188        struct bss_info *bss =  &priv->BSSinfo[bss_index];
3189
3190        memcpy(priv->CurrentBSSID, bss->BSSID, 6);
3191        memcpy(priv->SSID, bss->SSID, priv->SSID_size = bss->SSIDsize);
3192
3193        /* The WPA stuff cares about the current AP address */
3194        if (priv->use_wpa)
3195                build_wpa_mib(priv);
3196
3197        /* When switching to AdHoc turn OFF Power Save if needed */
3198
3199        if (bss->BSStype == IW_MODE_ADHOC &&
3200            priv->operating_mode != IW_MODE_ADHOC &&
3201            priv->power_mode) {
3202                priv->power_mode = 0;
3203                priv->listen_interval = 1;
3204                atmel_set_mib8(priv, Mac_Mgmt_Mib_Type,
3205                               MAC_MGMT_MIB_PS_MODE_POS,  ACTIVE_MODE);
3206                atmel_set_mib16(priv, Mac_Mgmt_Mib_Type,
3207                                MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 1);
3208        }
3209
3210        priv->operating_mode = bss->BSStype;
3211        priv->channel = bss->channel & 0x7f;
3212        priv->beacon_period = bss->beacon_period;
3213
3214        if (priv->preamble != bss->preamble) {
3215                priv->preamble = bss->preamble;
3216                atmel_set_mib8(priv, Local_Mib_Type,
3217                               LOCAL_MIB_PREAMBLE_TYPE, bss->preamble);
3218        }
3219
3220        if (!priv->wep_is_on && bss->UsingWEP) {
3221                atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
3222                priv->station_is_associated = 0;
3223                return;
3224        }
3225
3226        if (priv->wep_is_on && !bss->UsingWEP) {
3227                atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
3228                priv->station_is_associated = 0;
3229                return;
3230        }
3231
3232        atmel_enter_state(priv, STATION_STATE_JOINNING);
3233
3234        if (priv->operating_mode == IW_MODE_INFRA)
3235                join(priv, BSS_TYPE_INFRASTRUCTURE);
3236        else
3237                join(priv, BSS_TYPE_AD_HOC);
3238}
3239
3240static void restart_search(struct atmel_private *priv)
3241{
3242        int bss_index;
3243
3244        if (!priv->connect_to_any_BSS) {
3245                atmel_scan(priv, 1);
3246        } else {
3247                priv->BSSinfo[(int)(priv->current_BSS)].channel |= 0x80;
3248
3249                if ((bss_index = retrieve_bss(priv)) != -1)
3250                        atmel_join_bss(priv, bss_index);
3251                else
3252                        atmel_scan(priv, 0);
3253        }
3254}
3255
3256static void smooth_rssi(struct atmel_private *priv, u8 rssi)
3257{
3258        u8 old = priv->wstats.qual.level;
3259        u8 max_rssi = 42; /* 502-rmfd-revd max by experiment, default for now */
3260
3261        switch (priv->firmware_type) {
3262                case ATMEL_FW_TYPE_502E:
3263                        max_rssi = 63; /* 502-rmfd-reve max by experiment */
3264                        break;
3265                default:
3266                        break;
3267        }
3268
3269        rssi = rssi * 100 / max_rssi;
3270        if ((rssi + old) % 2)
3271                priv->wstats.qual.level = (rssi + old) / 2 + 1;
3272        else
3273                priv->wstats.qual.level = (rssi + old) / 2;
3274        priv->wstats.qual.updated |= IW_QUAL_LEVEL_UPDATED;
3275        priv->wstats.qual.updated &= ~IW_QUAL_LEVEL_INVALID;
3276}
3277
3278static void atmel_smooth_qual(struct atmel_private *priv)
3279{
3280        unsigned long time_diff = (jiffies - priv->last_qual) / HZ;
3281        while (time_diff--) {
3282                priv->last_qual += HZ;
3283                priv->wstats.qual.qual = priv->wstats.qual.qual / 2;
3284                priv->wstats.qual.qual +=
3285                        priv->beacons_this_sec * priv->beacon_period * (priv->wstats.qual.level + 100) / 4000;
3286                priv->beacons_this_sec = 0;
3287        }
3288        priv->wstats.qual.updated |= IW_QUAL_QUAL_UPDATED;
3289        priv->wstats.qual.updated &= ~IW_QUAL_QUAL_INVALID;
3290}
3291
3292/* deals with incoming managment frames. */
3293static void atmel_management_frame(struct atmel_private *priv,
3294                                   struct ieee80211_hdr_4addr *header,
3295                                   u16 frame_len, u8 rssi)
3296{
3297        u16 subtype;
3298
3299        subtype = le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_STYPE;
3300        switch (subtype) {
3301        case IEEE80211_STYPE_BEACON:
3302        case IEEE80211_STYPE_PROBE_RESP:
3303
3304                /* beacon frame has multiple variable-length fields -
3305                   never let an engineer loose with a data structure design. */
3306                {
3307                        struct beacon_format {
3308                                __le64 timestamp;
3309                                __le16 interval;
3310                                __le16 capability;
3311                                u8 ssid_el_id;
3312                                u8 ssid_length;
3313                                /* ssid here */
3314                                u8 rates_el_id;
3315                                u8 rates_length;
3316                                /* rates here */
3317                                u8 ds_el_id;
3318                                u8 ds_length;
3319                                /* ds here */
3320                        } *beacon = (struct beacon_format *)priv->rx_buf;
3321
3322                        u8 channel, rates_length, ssid_length;
3323                        u64 timestamp = le64_to_cpu(beacon->timestamp);
3324                        u16 beacon_interval = le16_to_cpu(beacon->interval);
3325                        u16 capability = le16_to_cpu(beacon->capability);
3326                        u8 *beaconp = priv->rx_buf;
3327                        ssid_length = beacon->ssid_length;
3328                        /* this blows chunks. */
3329                        if (frame_len < 14 || frame_len < ssid_length + 15)
3330                                return;
3331                        rates_length = beaconp[beacon->ssid_length + 15];
3332                        if (frame_len < ssid_length + rates_length + 18)
3333                                return;
3334                        if (ssid_length >  MAX_SSID_LENGTH)
3335                                return;
3336                        channel = beaconp[ssid_length + rates_length + 18];
3337
3338                        if (priv->station_state == STATION_STATE_READY) {
3339                                smooth_rssi(priv, rssi);
3340                                if (is_frame_from_current_bss(priv, header)) {
3341                                        priv->beacons_this_sec++;
3342                                        atmel_smooth_qual(priv);
3343                                        if (priv->last_beacon_timestamp) {
3344                                                /* Note truncate this to 32 bits - kernel can't divide a long long */
3345                                                u32 beacon_delay = timestamp - priv->last_beacon_timestamp;
3346                                                int beacons = beacon_delay / (beacon_interval * 1000);
3347                                                if (beacons > 1)
3348                                                        priv->wstats.miss.beacon += beacons - 1;
3349                                        }
3350                                        priv->last_beacon_timestamp = timestamp;
3351                                        handle_beacon_probe(priv, capability, channel);
3352                                }
3353                        }
3354
3355                        if (priv->station_state == STATION_STATE_SCANNING)
3356                                store_bss_info(priv, header, capability,
3357                                               beacon_interval, channel, rssi,
3358                                               ssid_length,
3359                                               &beacon->rates_el_id,
3360                                               subtype == IEEE80211_STYPE_BEACON);
3361                }
3362                break;
3363
3364        case IEEE80211_STYPE_AUTH:
3365
3366                if (priv->station_state == STATION_STATE_AUTHENTICATING)
3367                        authenticate(priv, frame_len);
3368
3369                break;
3370
3371        case IEEE80211_STYPE_ASSOC_RESP:
3372        case IEEE80211_STYPE_REASSOC_RESP:
3373
3374                if (priv->station_state == STATION_STATE_ASSOCIATING ||
3375                    priv->station_state == STATION_STATE_REASSOCIATING)
3376                        associate(priv, frame_len, subtype);
3377
3378                break;
3379
3380        case IEEE80211_STYPE_DISASSOC:
3381                if (priv->station_is_associated &&
3382                    priv->operating_mode == IW_MODE_INFRA &&
3383                    is_frame_from_current_bss(priv, header)) {
3384                        priv->station_was_associated = 0;
3385                        priv->station_is_associated = 0;
3386
3387                        atmel_enter_state(priv, STATION_STATE_JOINNING);
3388                        join(priv, BSS_TYPE_INFRASTRUCTURE);
3389                }
3390
3391                break;
3392
3393        case IEEE80211_STYPE_DEAUTH:
3394                if (priv->operating_mode == IW_MODE_INFRA &&
3395                    is_frame_from_current_bss(priv, header)) {
3396                        priv->station_was_associated = 0;
3397
3398                        atmel_enter_state(priv, STATION_STATE_JOINNING);
3399                        join(priv, BSS_TYPE_INFRASTRUCTURE);
3400                }
3401
3402                break;
3403        }
3404}
3405
3406/* run when timer expires */
3407static void atmel_management_timer(u_long a)
3408{
3409        struct net_device *dev = (struct net_device *) a;
3410        struct atmel_private *priv = netdev_priv(dev);
3411        unsigned long flags;
3412
3413        /* Check if the card has been yanked. */
3414        if (priv->card && priv->present_callback &&
3415                !(*priv->present_callback)(priv->card))
3416                return;
3417
3418        spin_lock_irqsave(&priv->irqlock, flags);
3419
3420        switch (priv->station_state) {
3421
3422        case STATION_STATE_AUTHENTICATING:
3423                if (priv->AuthenticationRequestRetryCnt >= MAX_AUTHENTICATION_RETRIES) {
3424                        atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
3425                        priv->station_is_associated = 0;
3426                        priv->AuthenticationRequestRetryCnt = 0;
3427                        restart_search(priv);
3428                } else {
3429                        int auth = WLAN_AUTH_OPEN;
3430                        priv->AuthenticationRequestRetryCnt++;
3431                        priv->CurrentAuthentTransactionSeqNum = 0x0001;
3432                        mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
3433                        if (priv->wep_is_on && priv->exclude_unencrypted)
3434                                auth = WLAN_AUTH_SHARED_KEY;
3435                        send_authentication_request(priv, auth, NULL, 0);
3436          }
3437          break;
3438
3439        case STATION_STATE_ASSOCIATING:
3440                if (priv->AssociationRequestRetryCnt == MAX_ASSOCIATION_RETRIES) {
3441                        atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
3442                        priv->station_is_associated = 0;
3443                        priv->AssociationRequestRetryCnt = 0;
3444                        restart_search(priv);
3445                } else {
3446                        priv->AssociationRequestRetryCnt++;
3447                        mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
3448                        send_association_request(priv, 0);
3449                }
3450          break;
3451
3452        case STATION_STATE_REASSOCIATING:
3453                if (priv->ReAssociationRequestRetryCnt == MAX_ASSOCIATION_RETRIES) {
3454                        atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
3455                        priv->station_is_associated = 0;
3456                        priv->ReAssociationRequestRetryCnt = 0;
3457                        restart_search(priv);
3458                } else {
3459                        priv->ReAssociationRequestRetryCnt++;
3460                        mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
3461                        send_association_request(priv, 1);
3462                }
3463                break;
3464
3465        default:
3466                break;
3467        }
3468
3469        spin_unlock_irqrestore(&priv->irqlock, flags);
3470}
3471
3472static void atmel_command_irq(struct atmel_private *priv)
3473{
3474        u8 status = atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_STATUS_OFFSET));
3475        u8 command = atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_COMMAND_OFFSET));
3476        int fast_scan;
3477        union iwreq_data wrqu;
3478
3479        if (status == CMD_STATUS_IDLE ||
3480            status == CMD_STATUS_IN_PROGRESS)
3481                return;
3482
3483        switch (command){
3484
3485        case CMD_Start:
3486                if (status == CMD_STATUS_COMPLETE) {
3487                        priv->station_was_associated = priv->station_is_associated;
3488                        atmel_get_mib(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_CUR_BSSID_POS,
3489                                      (u8 *)priv->CurrentBSSID, 6);
3490                        atmel_enter_state(priv, STATION_STATE_READY);
3491                }
3492                break;
3493
3494        case CMD_Scan:
3495                fast_scan = priv->fast_scan;
3496                priv->fast_scan = 0;
3497
3498                if (status != CMD_STATUS_COMPLETE) {
3499                        atmel_scan(priv, 1);
3500                } else {
3501                        int bss_index = retrieve_bss(priv);
3502                        int notify_scan_complete = 1;
3503                        if (bss_index != -1) {
3504                                atmel_join_bss(priv, bss_index);
3505                        } else if (priv->operating_mode == IW_MODE_ADHOC &&
3506                                   priv->SSID_size != 0) {
3507                                start(priv, BSS_TYPE_AD_HOC);
3508                        } else {
3509                                priv->fast_scan = !fast_scan;
3510                                atmel_scan(priv, 1);
3511                                notify_scan_complete = 0;
3512                        }
3513                        priv->site_survey_state = SITE_SURVEY_COMPLETED;
3514                        if (notify_scan_complete) {
3515                                wrqu.data.length = 0;
3516                                wrqu.data.flags = 0;
3517                                wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL);
3518                        }
3519                }
3520                break;
3521
3522        case CMD_SiteSurvey:
3523                priv->fast_scan = 0;
3524
3525                if (status != CMD_STATUS_COMPLETE)
3526                        return;
3527
3528                priv->site_survey_state = SITE_SURVEY_COMPLETED;
3529                if (priv->station_is_associated) {
3530                        atmel_enter_state(priv, STATION_STATE_READY);
3531                        wrqu.data.length = 0;
3532                        wrqu.data.flags = 0;
3533                        wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL);
3534                } else {
3535                        atmel_scan(priv, 1);
3536                }
3537                break;
3538
3539        case CMD_Join:
3540                if (status == CMD_STATUS_COMPLETE) {
3541                        if (priv->operating_mode == IW_MODE_ADHOC) {
3542                                priv->station_was_associated = priv->station_is_associated;
3543                                atmel_enter_state(priv, STATION_STATE_READY);
3544                        } else {
3545                                int auth = WLAN_AUTH_OPEN;
3546                                priv->AuthenticationRequestRetryCnt = 0;
3547                                atmel_enter_state(priv, STATION_STATE_AUTHENTICATING);
3548
3549                                mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
3550                                priv->CurrentAuthentTransactionSeqNum = 0x0001;
3551                                if (priv->wep_is_on && priv->exclude_unencrypted)
3552                                        auth = WLAN_AUTH_SHARED_KEY;
3553                                send_authentication_request(priv, auth, NULL, 0);
3554                        }
3555                        return;
3556                }
3557
3558                atmel_scan(priv, 1);
3559        }
3560}
3561
3562static int atmel_wakeup_firmware(struct atmel_private *priv)
3563{
3564        struct host_info_struct *iface = &priv->host_info;
3565        u16 mr1, mr3;
3566        int i;
3567
3568        if (priv->card_type == CARD_TYPE_SPI_FLASH)
3569                atmel_set_gcr(priv->dev, GCR_REMAP);
3570
3571        /* wake up on-board processor */
3572        atmel_clear_gcr(priv->dev, 0x0040);
3573        atmel_write16(priv->dev, BSR, BSS_SRAM);
3574
3575        if (priv->card_type == CARD_TYPE_SPI_FLASH)
3576                mdelay(100);
3577
3578        /* and wait for it */
3579        for (i = LOOP_RETRY_LIMIT; i; i--) {
3580                mr1 = atmel_read16(priv->dev, MR1);
3581                mr3 = atmel_read16(priv->dev, MR3);
3582
3583                if (mr3 & MAC_BOOT_COMPLETE)
3584                        break;
3585                if (mr1 & MAC_BOOT_COMPLETE &&
3586                    priv->bus_type == BUS_TYPE_PCCARD)
3587                        break;
3588        }
3589
3590        if (i == 0) {
3591                printk(KERN_ALERT "%s: MAC failed to boot.\n", priv->dev->name);
3592                return -EIO;
3593        }
3594
3595        if ((priv->host_info_base = atmel_read16(priv->dev, MR2)) == 0xffff) {
3596                printk(KERN_ALERT "%s: card missing.\n", priv->dev->name);
3597                return -ENODEV;
3598        }
3599
3600        /* now check for completion of MAC initialization through
3601           the FunCtrl field of the IFACE, poll MR1 to detect completion of
3602           MAC initialization, check completion status, set interrupt mask,
3603           enables interrupts and calls Tx and Rx initialization functions */
3604
3605        atmel_wmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET), FUNC_CTRL_INIT_COMPLETE);
3606
3607        for (i = LOOP_RETRY_LIMIT; i; i--) {
3608                mr1 = atmel_read16(priv->dev, MR1);
3609                mr3 = atmel_read16(priv->dev, MR3);
3610
3611                if (mr3 & MAC_INIT_COMPLETE)
3612                        break;
3613                if (mr1 & MAC_INIT_COMPLETE &&
3614                    priv->bus_type == BUS_TYPE_PCCARD)
3615                        break;
3616        }
3617
3618        if (i == 0) {
3619                printk(KERN_ALERT "%s: MAC failed to initialise.\n",
3620                                priv->dev->name);
3621                return -EIO;
3622        }
3623
3624        /* Check for MAC_INIT_OK only on the register that the MAC_INIT_OK was set */
3625        if ((mr3 & MAC_INIT_COMPLETE) &&
3626            !(atmel_read16(priv->dev, MR3) & MAC_INIT_OK)) {
3627                printk(KERN_ALERT "%s: MAC failed MR3 self-test.\n", priv->dev->name);
3628                return -EIO;
3629        }
3630        if ((mr1 & MAC_INIT_COMPLETE) &&
3631            !(atmel_read16(priv->dev, MR1) & MAC_INIT_OK)) {
3632                printk(KERN_ALERT "%s: MAC failed MR1 self-test.\n", priv->dev->name);
3633                return -EIO;
3634        }
3635
3636        atmel_copy_to_host(priv->dev, (unsigned char *)iface,
3637                           priv->host_info_base, sizeof(*iface));
3638
3639        iface->tx_buff_pos = le16_to_cpu(iface->tx_buff_pos);
3640        iface->tx_buff_size = le16_to_cpu(iface->tx_buff_size);
3641        iface->tx_desc_pos = le16_to_cpu(iface->tx_desc_pos);
3642        iface->tx_desc_count = le16_to_cpu(iface->tx_desc_count);
3643        iface->rx_buff_pos = le16_to_cpu(iface->rx_buff_pos);
3644        iface->rx_buff_size = le16_to_cpu(iface->rx_buff_size);
3645        iface->rx_desc_pos = le16_to_cpu(iface->rx_desc_pos);
3646        iface->rx_desc_count = le16_to_cpu(iface->rx_desc_count);
3647        iface->build_version = le16_to_cpu(iface->build_version);
3648        iface->command_pos = le16_to_cpu(iface->command_pos);
3649        iface->major_version = le16_to_cpu(iface->major_version);
3650        iface->minor_version = le16_to_cpu(iface->minor_version);
3651        iface->func_ctrl = le16_to_cpu(iface->func_ctrl);
3652        iface->mac_status = le16_to_cpu(iface->mac_status);
3653
3654        return 0;
3655}
3656
3657/* determine type of memory and MAC address */
3658static int probe_atmel_card(struct net_device *dev)
3659{
3660        int rc = 0;
3661        struct atmel_private *priv = netdev_priv(dev);
3662
3663        /* reset pccard */
3664        if (priv->bus_type == BUS_TYPE_PCCARD)
3665                atmel_write16(dev, GCR, 0x0060);
3666
3667        atmel_write16(dev, GCR, 0x0040);
3668        mdelay(500);
3669
3670        if (atmel_read16(dev, MR2) == 0) {
3671                /* No stored firmware so load a small stub which just
3672                   tells us the MAC address */
3673                int i;
3674                priv->card_type = CARD_TYPE_EEPROM;
3675                atmel_write16(dev, BSR, BSS_IRAM);
3676                atmel_copy_to_card(dev, 0, mac_reader, sizeof(mac_reader));
3677                atmel_set_gcr(dev, GCR_REMAP);
3678                atmel_clear_gcr(priv->dev, 0x0040);
3679                atmel_write16(dev, BSR, BSS_SRAM);
3680                for (i = LOOP_RETRY_LIMIT; i; i--)
3681                        if (atmel_read16(dev, MR3) & MAC_BOOT_COMPLETE)
3682                                break;
3683                if (i == 0) {
3684                        printk(KERN_ALERT "%s: MAC failed to boot MAC address reader.\n", dev->name);
3685                } else {
3686                        atmel_copy_to_host(dev, dev->dev_addr, atmel_read16(dev, MR2), 6);
3687                        /* got address, now squash it again until the network
3688                           interface is opened */
3689                        if (priv->bus_type == BUS_TYPE_PCCARD)
3690                                atmel_write16(dev, GCR, 0x0060);
3691                        atmel_write16(dev, GCR, 0x0040);
3692                        rc = 1;
3693                }
3694        } else if (atmel_read16(dev, MR4) == 0) {
3695                /* Mac address easy in this case. */
3696                priv->card_type = CARD_TYPE_PARALLEL_FLASH;
3697                atmel_write16(dev,  BSR, 1);
3698                atmel_copy_to_host(dev, dev->dev_addr, 0xc000, 6);
3699                atmel_write16(dev,  BSR, 0x200);
3700                rc = 1;
3701        } else {
3702                /* Standard firmware in flash, boot it up and ask
3703                   for the Mac Address */
3704                priv->card_type = CARD_TYPE_SPI_FLASH;
3705                if (atmel_wakeup_firmware(priv) == 0) {
3706                        atmel_get_mib(priv, Mac_Address_Mib_Type, 0, dev->dev_addr, 6);
3707
3708                        /* got address, now squash it again until the network
3709                           interface is opened */
3710                        if (priv->bus_type == BUS_TYPE_PCCARD)
3711                                atmel_write16(dev, GCR, 0x0060);
3712                        atmel_write16(dev, GCR, 0x0040);
3713                        rc = 1;
3714                }
3715        }
3716
3717        if (rc) {
3718                if (dev->dev_addr[0] == 0xFF) {
3719                        u8 default_mac[] = {0x00,0x04, 0x25, 0x00, 0x00, 0x00};
3720                        printk(KERN_ALERT "%s: *** Invalid MAC address. UPGRADE Firmware ****\n", dev->name);
3721                        memcpy(dev->dev_addr, default_mac, 6);
3722                }
3723        }
3724
3725        return rc;
3726}
3727
3728/* Move the encyption information on the MIB structure.
3729   This routine is for the pre-WPA firmware: later firmware has
3730   a different format MIB and a different routine. */
3731static void build_wep_mib(struct atmel_private *priv)
3732{
3733        struct { /* NB this is matched to the hardware, don't change. */
3734                u8 wep_is_on;
3735                u8 default_key; /* 0..3 */
3736                u8 reserved;
3737                u8 exclude_unencrypted;
3738
3739                u32 WEPICV_error_count;
3740                u32 WEP_excluded_count;
3741
3742                u8 wep_keys[MAX_ENCRYPTION_KEYS][13];
3743                u8 encryption_level; /* 0, 1, 2 */
3744                u8 reserved2[3];
3745        } mib;
3746        int i;
3747
3748        mib.wep_is_on = priv->wep_is_on;
3749        if (priv->wep_is_on) {
3750                if (priv->wep_key_len[priv->default_key] > 5)
3751                        mib.encryption_level = 2;
3752                else
3753                        mib.encryption_level = 1;
3754        } else {
3755                mib.encryption_level = 0;
3756        }
3757
3758        mib.default_key = priv->default_key;
3759        mib.exclude_unencrypted = priv->exclude_unencrypted;
3760
3761        for (i = 0; i < MAX_ENCRYPTION_KEYS; i++)
3762                memcpy(mib.wep_keys[i], priv->wep_keys[i], 13);
3763
3764        atmel_set_mib(priv, Mac_Wep_Mib_Type, 0, (u8 *)&mib, sizeof(mib));
3765}
3766
3767static void build_wpa_mib(struct atmel_private *priv)
3768{
3769        /* This is for the later (WPA enabled) firmware. */
3770
3771        struct { /* NB this is matched to the hardware, don't change. */
3772                u8 cipher_default_key_value[MAX_ENCRYPTION_KEYS][MAX_ENCRYPTION_KEY_SIZE];
3773                u8 receiver_address[6];
3774                u8 wep_is_on;
3775                u8 default_key; /* 0..3 */
3776                u8 group_key;
3777                u8 exclude_unencrypted;
3778                u8 encryption_type;
3779                u8 reserved;
3780
3781                u32 WEPICV_error_count;
3782                u32 WEP_excluded_count;
3783
3784                u8 key_RSC[4][8];
3785        } mib;
3786
3787        int i;
3788
3789        mib.wep_is_on = priv->wep_is_on;
3790        mib.exclude_unencrypted = priv->exclude_unencrypted;
3791        memcpy(mib.receiver_address, priv->CurrentBSSID, 6);
3792
3793        /* zero all the keys before adding in valid ones. */
3794        memset(mib.cipher_default_key_value, 0, sizeof(mib.cipher_default_key_value));
3795
3796        if (priv->wep_is_on) {
3797                /* There's a comment in the Atmel code to the effect that this
3798                   is only valid when still using WEP, it may need to be set to
3799                   something to use WPA */
3800                memset(mib.key_RSC, 0, sizeof(mib.key_RSC));
3801
3802                mib.default_key = mib.group_key = 255;
3803                for (i = 0; i < MAX_ENCRYPTION_KEYS; i++) {
3804                        if (priv->wep_key_len[i] > 0) {
3805                                memcpy(mib.cipher_default_key_value[i], priv->wep_keys[i], MAX_ENCRYPTION_KEY_SIZE);
3806                                if (i == priv->default_key) {
3807                                        mib.default_key = i;
3808                                        mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-1] = 7;
3809                                        mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-2] = priv->pairwise_cipher_suite;
3810                                } else {
3811                                        mib.group_key = i;
3812                                        priv->group_cipher_suite = priv->pairwise_cipher_suite;
3813                                        mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-1] = 1;
3814                                        mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-2] = priv->group_cipher_suite;
3815                                }
3816                        }
3817                }
3818                if (mib.default_key == 255)
3819                        mib.default_key = mib.group_key != 255 ? mib.group_key : 0;
3820                if (mib.group_key == 255)
3821                        mib.group_key = mib.default_key;
3822
3823        }
3824
3825        atmel_set_mib(priv, Mac_Wep_Mib_Type, 0, (u8 *)&mib, sizeof(mib));
3826}
3827
3828static int reset_atmel_card(struct net_device *dev)
3829{
3830        /* do everything necessary to wake up the hardware, including
3831           waiting for the lightning strike and throwing the knife switch....
3832
3833           set all the Mib values which matter in the card to match
3834           their settings in the atmel_private structure. Some of these
3835           can be altered on the fly, but many (WEP, infrastucture or ad-hoc)
3836           can only be changed by tearing down the world and coming back through
3837           here.
3838
3839           This routine is also responsible for initialising some
3840           hardware-specific fields in the atmel_private structure,
3841           including a copy of the firmware's hostinfo stucture
3842           which is the route into the rest of the firmare datastructures. */
3843
3844        struct atmel_private *priv = netdev_priv(dev);
3845        u8 configuration;
3846        int old_state = priv->station_state;
3847        int err = 0;
3848
3849        /* data to add to the firmware names, in priority order
3850           this implemenents firmware versioning */
3851
3852        static char *firmware_modifier[] = {
3853                "-wpa",
3854                "",
3855                NULL
3856        };
3857
3858        /* reset pccard */
3859        if (priv->bus_type == BUS_TYPE_PCCARD)
3860                atmel_write16(priv->dev, GCR, 0x0060);
3861
3862        /* stop card , disable interrupts */
3863        atmel_write16(priv->dev, GCR, 0x0040);
3864
3865        if (priv->card_type == CARD_TYPE_EEPROM) {
3866                /* copy in firmware if needed */
3867                const struct firmware *fw_entry = NULL;
3868                const unsigned char *fw;
3869                int len = priv->firmware_length;
3870                if (!(fw = priv->firmware)) {
3871                        if (priv->firmware_type == ATMEL_FW_TYPE_NONE) {
3872                                if (strlen(priv->firmware_id) == 0) {
3873                                        printk(KERN_INFO
3874                                               "%s: card type is unknown: assuming at76c502 firmware is OK.\n",
3875                                               dev->name);
3876                                        printk(KERN_INFO
3877                                               "%s: if not, use the firmware= module parameter.\n",
3878                                               dev->name);
3879                                        strcpy(priv->firmware_id, "atmel_at76c502.bin");
3880                                }
3881                                err = request_firmware(&fw_entry, priv->firmware_id, priv->sys_dev);
3882                                if (err != 0) {
3883                                        printk(KERN_ALERT
3884                                               "%s: firmware %s is missing, cannot continue.\n",
3885                                               dev->name, priv->firmware_id);
3886                                        return err;
3887                                }
3888                        } else {
3889                                int fw_index = 0;
3890                                int success = 0;
3891
3892                                /* get firmware filename entry based on firmware type ID */
3893                                while (fw_table[fw_index].fw_type != priv->firmware_type
3894                                                && fw_table[fw_index].fw_type != ATMEL_FW_TYPE_NONE)
3895                                        fw_index++;
3896
3897                                /* construct the actual firmware file name */
3898                                if (fw_table[fw_index].fw_type != ATMEL_FW_TYPE_NONE) {
3899                                        int i;
3900                                        for (i = 0; firmware_modifier[i]; i++) {
3901                                                snprintf(priv->firmware_id, 32, "%s%s.%s", fw_table[fw_index].fw_file,
3902                                                        firmware_modifier[i], fw_table[fw_index].fw_file_ext);
3903                                                priv->firmware_id[31] = '\0';
3904                                                if (request_firmware(&fw_entry, priv->firmware_id, priv->sys_dev) == 0) {
3905                                                        success = 1;
3906                                                        break;
3907                                                }
3908                                        }
3909                                }
3910                                if (!success) {
3911                                        printk(KERN_ALERT
3912                                               "%s: firmware %s is missing, cannot start.\n",
3913                                               dev->name, priv->firmware_id);
3914                                        priv->firmware_id[0] = '\0';
3915                                        return -ENOENT;
3916                                }
3917                        }
3918
3919                        fw = fw_entry->data;
3920                        len = fw_entry->size;
3921                }
3922
3923                if (len <= 0x6000) {
3924                        atmel_write16(priv->dev, BSR, BSS_IRAM);
3925                        atmel_copy_to_card(priv->dev, 0, fw, len);
3926                        atmel_set_gcr(priv->dev, GCR_REMAP);
3927                } else {
3928                        /* Remap */
3929                        atmel_set_gcr(priv->dev, GCR_REMAP);
3930                        atmel_write16(priv->dev, BSR, BSS_IRAM);
3931                        atmel_copy_to_card(priv->dev, 0, fw, 0x6000);
3932                        atmel_write16(priv->dev, BSR, 0x2ff);
3933                        atmel_copy_to_card(priv->dev, 0x8000, &fw[0x6000], len - 0x6000);
3934                }
3935
3936                if (fw_entry)
3937                        release_firmware(fw_entry);
3938        }
3939
3940        err = atmel_wakeup_firmware(priv);
3941        if (err != 0)
3942                return err;
3943
3944        /* Check the version and set the correct flag for wpa stuff,
3945           old and new firmware is incompatible.
3946           The pre-wpa 3com firmware reports major version 5,
3947           the wpa 3com firmware is major version 4 and doesn't need
3948           the 3com broken-ness filter. */
3949        priv->use_wpa = (priv->host_info.major_version == 4);
3950        priv->radio_on_broken = (priv->host_info.major_version == 5);
3951
3952        /* unmask all irq sources */
3953        atmel_wmem8(priv, atmel_hi(priv, IFACE_INT_MASK_OFFSET), 0xff);
3954
3955        /* int Tx system and enable Tx */
3956        atmel_wmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, 0), 0);
3957        atmel_wmem32(priv, atmel_tx(priv, TX_DESC_NEXT_OFFSET, 0), 0x80000000L);
3958        atmel_wmem16(priv, atmel_tx(priv, TX_DESC_POS_OFFSET, 0), 0);
3959        atmel_wmem16(priv, atmel_tx(priv, TX_DESC_SIZE_OFFSET, 0), 0);
3960
3961        priv->tx_desc_free = priv->host_info.tx_desc_count;
3962        priv->tx_desc_head = 0;
3963        priv->tx_desc_tail = 0;
3964        priv->tx_desc_previous = 0;
3965        priv->tx_free_mem = priv->host_info.tx_buff_size;
3966        priv->tx_buff_head = 0;
3967        priv->tx_buff_tail = 0;
3968
3969        configuration = atmel_rmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET));
3970        atmel_wmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET),
3971                                   configuration | FUNC_CTRL_TxENABLE);
3972
3973        /* init Rx system and enable */
3974        priv->rx_desc_head = 0;
3975
3976        configuration = atmel_rmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET));
3977        atmel_wmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET),
3978                                   configuration | FUNC_CTRL_RxENABLE);
3979
3980        if (!priv->radio_on_broken) {
3981                if (atmel_send_command_wait(priv, CMD_EnableRadio, NULL, 0) ==
3982                    CMD_STATUS_REJECTED_RADIO_OFF) {
3983                        printk(KERN_INFO "%s: cannot turn the radio on.\n",
3984                               dev->name);
3985                        return -EIO;
3986                }
3987        }
3988
3989        /* set up enough MIB values to run. */
3990        atmel_set_mib8(priv, Local_Mib_Type, LOCAL_MIB_AUTO_TX_RATE_POS, priv->auto_tx_rate);
3991        atmel_set_mib8(priv, Local_Mib_Type,  LOCAL_MIB_TX_PROMISCUOUS_POS,  PROM_MODE_OFF);
3992        atmel_set_mib16(priv, Mac_Mib_Type, MAC_MIB_RTS_THRESHOLD_POS, priv->rts_threshold);
3993        atmel_set_mib16(priv, Mac_Mib_Type, MAC_MIB_FRAG_THRESHOLD_POS, priv->frag_threshold);
3994        atmel_set_mib8(priv, Mac_Mib_Type, MAC_MIB_SHORT_RETRY_POS, priv->short_retry);
3995        atmel_set_mib8(priv, Mac_Mib_Type, MAC_MIB_LONG_RETRY_POS, priv->long_retry);
3996        atmel_set_mib8(priv, Local_Mib_Type, LOCAL_MIB_PREAMBLE_TYPE, priv->preamble);
3997        atmel_set_mib(priv, Mac_Address_Mib_Type, MAC_ADDR_MIB_MAC_ADDR_POS,
3998                      priv->dev->dev_addr, 6);
3999        atmel_set_mib8(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_PS_MODE_POS, ACTIVE_MODE);
4000        atmel_set_mib16(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 1);

4001        atmel_set_mib16(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_BEACON_PER_POS, priv->default_beacon_period);
4002        atmel_set_mib(priv, Phy_Mib_Type, PHY_MIB_RATE_SET_POS, atmel_basic_rates, 4);
4003        atmel_set_mib8(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_CUR_PRIVACY_POS, priv->wep_is_on);
4004        if (priv->use_wpa)
4005                build_wpa_mib(priv);
4006        else
4007                build_wep_mib(priv);
4008
4009        if (old_state == STATION_STATE_READY)
4010        {
4011                union iwreq_data wrqu;
4012
4013                wrqu.data.length = 0;
4014                wrqu.data.flags = 0;
4015                wrqu.ap_addr.sa_family = ARPHRD_ETHER;
4016                memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
4017                wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
4018        }
4019
4020        return 0;
4021}
4022
4023static void atmel_send_command(struct atmel_private *priv, int command,
4024                               void *cmd, int cmd_size)
4025{
4026        if (cmd)
4027                atmel_copy_to_card(priv->dev, atmel_co(priv, CMD_BLOCK_PARAMETERS_OFFSET),
4028                                   cmd, cmd_size);
4029
4030        atmel_wmem8(priv, atmel_co(priv, CMD_BLOCK_COMMAND_OFFSET), command);
4031        atmel_wmem8(priv, atmel_co(priv, CMD_BLOCK_STATUS_OFFSET), 0);
4032}
4033
4034static int atmel_send_command_wait(struct atmel_private *priv, int command,
4035                                   void *cmd, int cmd_size)
4036{
4037        int i, status;
4038
4039        atmel_send_command(priv, command, cmd, cmd_size);
4040
4041        for (i = 5000; i; i--) {
4042                status = atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_STATUS_OFFSET));
4043                if (status != CMD_STATUS_IDLE &&
4044                    status != CMD_STATUS_IN_PROGRESS)
4045                        break;
4046                udelay(20);
4047        }
4048
4049        if (i == 0) {
4050                printk(KERN_ALERT "%s: failed to contact MAC.\n", priv->dev->name);
4051                status =  CMD_STATUS_HOST_ERROR;
4052        } else {
4053                if (command != CMD_EnableRadio)
4054                        status = CMD_STATUS_COMPLETE;
4055        }
4056
4057        return status;
4058}
4059
4060static u8 atmel_get_mib8(struct atmel_private *priv, u8 type, u8 index)
4061{
4062        struct get_set_mib m;
4063        m.type = type;
4064        m.size = 1;
4065        m.index = index;
4066
4067        atmel_send_command_wait(priv, CMD_Get_MIB_Vars, &m, MIB_HEADER_SIZE + 1);
4068        return atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_PARAMETERS_OFFSET + MIB_HEADER_SIZE));
4069}
4070
4071static void atmel_set_mib8(struct atmel_private *priv, u8 type, u8 index, u8 data)
4072{
4073        struct get_set_mib m;
4074        m.type = type;
4075        m.size = 1;
4076        m.index = index;
4077        m.data[0] = data;
4078
4079        atmel_send_command_wait(priv, CMD_Set_MIB_Vars, &m, MIB_HEADER_SIZE + 1);
4080}
4081
4082static void atmel_set_mib16(struct atmel_private *priv, u8 type, u8 index,
4083                            u16 data)
4084{
4085        struct get_set_mib m;
4086        m.type = type;
4087        m.size = 2;
4088        m.index = index;
4089        m.data[0] = data;
4090        m.data[1] = data >> 8;
4091
4092        atmel_send_command_wait(priv, CMD_Set_MIB_Vars, &m, MIB_HEADER_SIZE + 2);
4093}
4094
4095static void atmel_set_mib(struct atmel_private *priv, u8 type, u8 index,
4096                          u8 *data, int data_len)
4097{
4098        struct get_set_mib m;
4099        m.type = type;
4100        m.size = data_len;
4101        m.index = index;
4102
4103        if (data_len > MIB_MAX_DATA_BYTES)
4104                printk(KERN_ALERT "%s: MIB buffer too small.\n", priv->dev->name);
4105
4106        memcpy(m.data, data, data_len);
4107        atmel_send_command_wait(priv, CMD_Set_MIB_Vars, &m, MIB_HEADER_SIZE + data_len);
4108}
4109
4110static void atmel_get_mib(struct atmel_private *priv, u8 type, u8 index,
4111                          u8 *data, int data_len)
4112{
4113        struct get_set_mib m;
4114        m.type = type;
4115        m.size = data_len;
4116        m.index = index;
4117
4118        if (data_len > MIB_MAX_DATA_BYTES)
4119                printk(KERN_ALERT "%s: MIB buffer too small.\n", priv->dev->name);
4120
4121        atmel_send_command_wait(priv, CMD_Get_MIB_Vars, &m, MIB_HEADER_SIZE + data_len);
4122        atmel_copy_to_host(priv->dev, data,
4123                           atmel_co(priv, CMD_BLOCK_PARAMETERS_OFFSET + MIB_HEADER_SIZE), data_len);
4124}
4125
4126static void atmel_writeAR(struct net_device *dev, u16 data)
4127{
4128        int i;
4129        outw(data, dev->base_addr + AR);
4130        /* Address register appears to need some convincing..... */
4131        for (i = 0; data != inw(dev->base_addr + AR) && i < 10; i++)
4132                outw(data, dev->base_addr + AR);
4133}
4134
4135static void atmel_copy_to_card(struct net_device *dev, u16 dest,
4136                               const unsigned char *src, u16 len)
4137{
4138        int i;
4139        atmel_writeAR(dev, dest);
4140        if (dest % 2) {
4141                atmel_write8(dev, DR, *src);
4142                src++; len--;
4143        }
4144        for (i = len; i > 1 ; i -= 2) {
4145                u8 lb = *src++;
4146                u8 hb = *src++;
4147                atmel_write16(dev, DR, lb | (hb << 8));
4148        }
4149        if (i)
4150                atmel_write8(dev, DR, *src);
4151}
4152
4153static void atmel_copy_to_host(struct net_device *dev, unsigned char *dest,
4154                               u16 src, u16 len)
4155{
4156        int i;
4157        atmel_writeAR(dev, src);
4158        if (src % 2) {
4159                *dest = atmel_read8(dev, DR);
4160                dest++; len--;
4161        }
4162        for (i = len; i > 1 ; i -= 2) {
4163                u16 hw = atmel_read16(dev, DR);
4164                *dest++ = hw;
4165                *dest++ = hw >> 8;
4166        }
4167        if (i)
4168                *dest = atmel_read8(dev, DR);
4169}
4170
4171static void atmel_set_gcr(struct net_device *dev, u16 mask)
4172{
4173        outw(inw(dev->base_addr + GCR) | mask, dev->base_addr + GCR);
4174}
4175
4176static void atmel_clear_gcr(struct net_device *dev, u16 mask)
4177{
4178        outw(inw(dev->base_addr + GCR) & ~mask, dev->base_addr + GCR);
4179}
4180
4181static int atmel_lock_mac(struct atmel_private *priv)
4182{
4183        int i, j = 20;
4184 retry:
4185        for (i = 5000; i; i--) {
4186                if (!atmel_rmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_HOST_OFFSET)))
4187                        break;
4188                udelay(20);
4189        }
4190
4191        if (!i)
4192                return 0; /* timed out */
4193
4194        atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 1);
4195        if (atmel_rmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_HOST_OFFSET))) {
4196                atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 0);
4197                if (!j--)
4198                        return 0; /* timed out */
4199                goto retry;
4200        }
4201
4202        return 1;
4203}
4204
4205static void atmel_wmem32(struct atmel_private *priv, u16 pos, u32 data)
4206{
4207        atmel_writeAR(priv->dev, pos);
4208        atmel_write16(priv->dev, DR, data); /* card is little-endian */
4209        atmel_write16(priv->dev, DR, data >> 16);
4210}
4211
4212/***************************************************************************/
4213/* There follows the source form of the MAC address reading firmware       */
4214/***************************************************************************/
4215#if 0
4216
4217/* Copyright 2003 Matthew T. Russotto                                      */
4218/* But derived from the Atmel 76C502 firmware written by Atmel and         */
4219/* included in "atmel wireless lan drivers" package                        */
4220/**
4221    This file is part of net.russotto.AtmelMACFW, hereto referred to
4222    as AtmelMACFW
4223
4224    AtmelMACFW is free software; you can redistribute it and/or modify
4225    it under the terms of the GNU General Public License version 2
4226    as published by the Free Software Foundation.
4227
4228    AtmelMACFW is distributed in the hope that it will be useful,
4229    but WITHOUT ANY WARRANTY; without even the implied warranty of
4230    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
4231    GNU General Public License for more details.
4232
4233    You should have received a copy of the GNU General Public License
4234    along with AtmelMACFW; if not, write to the Free Software
4235    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
4236
4237****************************************************************************/
4238/* This firmware should work on the 76C502 RFMD, RFMD_D, and RFMD_E        */
4239/* It will probably work on the 76C504 and 76C502 RFMD_3COM                */
4240/* It only works on SPI EEPROM versions of the card.                       */
4241
4242/* This firmware initializes the SPI controller and clock, reads the MAC   */
4243/* address from the EEPROM into SRAM, and puts the SRAM offset of the MAC  */
4244/* address in MR2, and sets MR3 to 0x10 to indicate it is done             */
4245/* It also puts a complete copy of the EEPROM in SRAM with the offset in   */
4246/* MR4, for investigational purposes (maybe we can determine chip type     */
4247/* from that?)                                                             */
4248
4249        .org 0
4250    .set MRBASE, 0x8000000
4251        .set CPSR_INITIAL, 0xD3 /* IRQ/FIQ disabled, ARM mode, Supervisor state */
4252        .set CPSR_USER, 0xD1 /* IRQ/FIQ disabled, ARM mode, USER state */
4253        .set SRAM_BASE,  0x02000000
4254        .set SP_BASE,    0x0F300000
4255        .set UNK_BASE,   0x0F000000 /* Some internal device, but which one? */
4256        .set SPI_CGEN_BASE,  0x0E000000 /* Some internal device, but which one? */
4257        .set UNK3_BASE,  0x02014000 /* Some internal device, but which one? */
4258        .set STACK_BASE, 0x5600
4259        .set SP_SR, 0x10
4260        .set SP_TDRE, 2 /* status register bit -- TDR empty */
4261        .set SP_RDRF, 1 /* status register bit -- RDR full */
4262        .set SP_SWRST, 0x80
4263        .set SP_SPIEN, 0x1
4264        .set SP_CR, 0   /* control register */
4265        .set SP_MR, 4   /* mode register */
4266        .set SP_RDR, 0x08 /* Read Data Register */
4267        .set SP_TDR, 0x0C /* Transmit Data Register */
4268        .set SP_CSR0, 0x30 /* chip select registers */
4269        .set SP_CSR1, 0x34
4270        .set SP_CSR2, 0x38
4271        .set SP_CSR3, 0x3C
4272        .set NVRAM_CMD_RDSR, 5 /* read status register */
4273        .set NVRAM_CMD_READ, 3 /* read data */
4274        .set NVRAM_SR_RDY, 1 /* RDY bit.  This bit is inverted */
4275        .set SPI_8CLOCKS, 0xFF /* Writing this to the TDR doesn't do anything to the
4276                                  serial output, since SO is normally high.  But it
4277                                  does cause 8 clock cycles and thus 8 bits to be
4278                                  clocked in to the chip.  See Atmel's SPI
4279                                  controller (e.g. AT91M55800) timing and 4K
4280                                  SPI EEPROM manuals */
4281
4282        .set NVRAM_SCRATCH, 0x02000100  /* arbitrary area for scratchpad memory */
4283        .set NVRAM_IMAGE, 0x02000200
4284        .set NVRAM_LENGTH, 0x0200
4285        .set MAC_ADDRESS_MIB, SRAM_BASE
4286        .set MAC_ADDRESS_LENGTH, 6
4287        .set MAC_BOOT_FLAG, 0x10
4288        .set MR1, 0
4289        .set MR2, 4
4290        .set MR3, 8
4291        .set MR4, 0xC
4292RESET_VECTOR:
4293        b RESET_HANDLER
4294UNDEF_VECTOR:
4295        b HALT1
4296SWI_VECTOR:
4297        b HALT1
4298IABORT_VECTOR:
4299        b HALT1
4300DABORT_VECTOR:
4301RESERVED_VECTOR:
4302        b HALT1
4303IRQ_VECTOR:
4304        b HALT1
4305FIQ_VECTOR:
4306        b HALT1
4307HALT1:  b HALT1
4308RESET_HANDLER:
4309        mov     r0, #CPSR_INITIAL
4310        msr     CPSR_c, r0      /* This is probably unnecessary */
4311
4312/* I'm guessing this is initializing clock generator electronics for SPI */
4313        ldr     r0, =SPI_CGEN_BASE
4314        mov     r1, #0
4315        mov     r1, r1, lsl #3
4316        orr     r1,r1, #0
4317        str     r1, [r0]
4318        ldr     r1, [r0, #28]
4319        bic     r1, r1, #16
4320        str     r1, [r0, #28]
4321        mov     r1, #1
4322        str     r1, [r0, #8]
4323
4324        ldr     r0, =MRBASE
4325        mov     r1, #0
4326        strh    r1, [r0, #MR1]
4327        strh    r1, [r0, #MR2]
4328        strh    r1, [r0, #MR3]
4329        strh    r1, [r0, #MR4]
4330
4331        mov     sp, #STACK_BASE
4332        bl      SP_INIT
4333        mov     r0, #10
4334        bl      DELAY9
4335        bl      GET_MAC_ADDR
4336        bl      GET_WHOLE_NVRAM
4337        ldr     r0, =MRBASE
4338        ldr     r1, =MAC_ADDRESS_MIB
4339        strh    r1, [r0, #MR2]
4340        ldr     r1, =NVRAM_IMAGE
4341        strh    r1, [r0, #MR4]
4342        mov     r1, #MAC_BOOT_FLAG
4343        strh    r1, [r0, #MR3]
4344HALT2:  b HALT2
4345.func Get_Whole_NVRAM, GET_WHOLE_NVRAM
4346GET_WHOLE_NVRAM:
4347        stmdb   sp!, {lr}
4348        mov     r2, #0 /* 0th bytes of NVRAM */
4349        mov     r3, #NVRAM_LENGTH
4350        mov     r1, #0          /* not used in routine */
4351        ldr     r0, =NVRAM_IMAGE
4352        bl      NVRAM_XFER
4353        ldmia   sp!, {lr}
4354        bx      lr
4355.endfunc
4356
4357.func Get_MAC_Addr, GET_MAC_ADDR
4358GET_MAC_ADDR:
4359        stmdb   sp!, {lr}
4360        mov     r2, #0x120      /* address of MAC Address within NVRAM */
4361        mov     r3, #MAC_ADDRESS_LENGTH
4362        mov     r1, #0          /* not used in routine */
4363        ldr     r0, =MAC_ADDRESS_MIB
4364        bl      NVRAM_XFER
4365        ldmia   sp!, {lr}
4366        bx      lr
4367.endfunc
4368.ltorg
4369.func Delay9, DELAY9
4370DELAY9:
4371        adds    r0, r0, r0, LSL #3   /* r0 = r0 * 9 */
4372DELAYLOOP:
4373        beq     DELAY9_done
4374        subs    r0, r0, #1
4375        b       DELAYLOOP
4376DELAY9_done:
4377        bx      lr
4378.endfunc
4379
4380.func SP_Init, SP_INIT
4381SP_INIT:
4382        mov     r1, #SP_SWRST
4383        ldr     r0, =SP_BASE
4384        str     r1, [r0, #SP_CR] /* reset the SPI */
4385        mov     r1, #0
4386        str     r1, [r0, #SP_CR] /* release SPI from reset state */
4387        mov     r1, #SP_SPIEN
4388        str     r1, [r0, #SP_MR] /* set the SPI to MASTER mode*/
4389        str     r1, [r0, #SP_CR] /* enable the SPI */
4390
4391/*  My guess would be this turns on the SPI clock */
4392        ldr     r3, =SPI_CGEN_BASE
4393        ldr     r1, [r3, #28]
4394        orr     r1, r1, #0x2000
4395        str     r1, [r3, #28]
4396
4397        ldr     r1, =0x2000c01
4398        str     r1, [r0, #SP_CSR0]
4399        ldr     r1, =0x2000201
4400        str     r1, [r0, #SP_CSR1]
4401        str     r1, [r0, #SP_CSR2]
4402        str     r1, [r0, #SP_CSR3]
4403        ldr     r1, [r0, #SP_SR]
4404        ldr     r0, [r0, #SP_RDR]
4405        bx      lr
4406.endfunc
4407.func NVRAM_Init, NVRAM_INIT
4408NVRAM_INIT:
4409        ldr     r1, =SP_BASE
4410        ldr     r0, [r1, #SP_RDR]
4411        mov     r0, #NVRAM_CMD_RDSR
4412        str     r0, [r1, #SP_TDR]
4413SP_loop1:
4414        ldr     r0, [r1, #SP_SR]
4415        tst     r0, #SP_TDRE
4416        beq     SP_loop1
4417
4418        mov     r0, #SPI_8CLOCKS
4419        str     r0, [r1, #SP_TDR]
4420SP_loop2:
4421        ldr     r0, [r1, #SP_SR]
4422        tst     r0, #SP_TDRE
4423        beq     SP_loop2
4424
4425        ldr     r0, [r1, #SP_RDR]
4426SP_loop3:
4427        ldr     r0, [r1, #SP_SR]
4428        tst     r0, #SP_RDRF
4429        beq     SP_loop3
4430
4431        ldr     r0, [r1, #SP_RDR]
4432        and     r0, r0, #255
4433        bx      lr
4434.endfunc
4435
4436.func NVRAM_Xfer, NVRAM_XFER
4437        /* r0 = dest address */
4438        /* r1 = not used */
4439        /* r2 = src address within NVRAM */
4440        /* r3 = length */
4441NVRAM_XFER:
4442        stmdb   sp!, {r4, r5, lr}
4443        mov     r5, r0          /* save r0 (dest address) */
4444        mov     r4, r3          /* save r3 (length) */
4445        mov     r0, r2, LSR #5 /*  SPI memories put A8 in the command field */
4446        and     r0, r0, #8
4447        add     r0, r0, #NVRAM_CMD_READ
4448        ldr     r1, =NVRAM_SCRATCH
4449        strb    r0, [r1, #0]    /* save command in NVRAM_SCRATCH[0] */
4450        strb    r2, [r1, #1]    /* save low byte of source address in NVRAM_SCRATCH[1] */
4451_local1:
4452        bl      NVRAM_INIT
4453        tst     r0, #NVRAM_SR_RDY
4454        bne     _local1
4455        mov     r0, #20
4456        bl      DELAY9
4457        mov     r2, r4          /* length */
4458        mov     r1, r5          /* dest address */
4459        mov     r0, #2          /* bytes to transfer in command */
4460        bl      NVRAM_XFER2
4461        ldmia   sp!, {r4, r5, lr}
4462        bx      lr
4463.endfunc
4464
4465.func NVRAM_Xfer2, NVRAM_XFER2
4466NVRAM_XFER2:
4467        stmdb   sp!, {r4, r5, r6, lr}
4468        ldr     r4, =SP_BASE
4469        mov     r3, #0
4470        cmp     r0, #0
4471        bls     _local2
4472        ldr     r5, =NVRAM_SCRATCH
4473_local4:
4474        ldrb    r6, [r5, r3]
4475        str     r6, [r4, #SP_TDR]
4476_local3:
4477        ldr     r6, [r4, #SP_SR]
4478        tst     r6, #SP_TDRE
4479        beq     _local3
4480        add     r3, r3, #1
4481        cmp     r3, r0 /* r0 is # of bytes to send out (command+addr) */
4482        blo     _local4
4483_local2:
4484        mov     r3, #SPI_8CLOCKS
4485        str     r3, [r4, #SP_TDR]
4486        ldr     r0, [r4, #SP_RDR]
4487_local5:
4488        ldr     r0, [r4, #SP_SR]
4489        tst     r0, #SP_RDRF
4490        beq     _local5
4491        ldr     r0, [r4, #SP_RDR] /* what's this byte?  It's the byte read while writing the TDR -- nonsense, because the NVRAM doesn't read and write at the same time */
4492        mov     r0, #0
4493        cmp     r2, #0  /* r2 is # of bytes to copy in */
4494        bls     _local6
4495_local7:
4496        ldr     r5, [r4, #SP_SR]
4497        tst     r5, #SP_TDRE
4498        beq     _local7
4499        str     r3, [r4, #SP_TDR]  /* r3 has SPI_8CLOCKS */
4500_local8:
4501        ldr     r5, [r4, #SP_SR]
4502        tst     r5, #SP_RDRF
4503        beq     _local8
4504        ldr     r5, [r4, #SP_RDR] /* but didn't we read this byte above? */
4505        strb    r5, [r1], #1 /* postindexed */
4506        add     r0, r0, #1
4507        cmp     r0, r2
4508        blo     _local7 /* since we don't send another address, the NVRAM must be capable of sequential reads */
4509_local6:
4510        mov     r0, #200
4511        bl      DELAY9
4512        ldmia   sp!, {r4, r5, r6, lr}
4513        bx      lr
4514#endif
4515