linux-old/drivers/hotplug/cpqphp.h
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   1/*
   2 * Compaq Hot Plug Controller Driver
   3 *
   4 * Copyright (C) 1995,2001 Compaq Computer Corporation
   5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
   6 * Copyright (C) 2001 IBM
   7 *
   8 * All rights reserved.
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License as published by
  12 * the Free Software Foundation; either version 2 of the License, or (at
  13 * your option) any later version.
  14 *
  15 * This program is distributed in the hope that it will be useful, but
  16 * WITHOUT ANY WARRANTY; without even the implied warranty of
  17 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  18 * NON INFRINGEMENT.  See the GNU General Public License for more
  19 * details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24 *
  25 * Send feedback to <greg@kroah.com>
  26 *
  27 */
  28#ifndef _CPQPHP_H
  29#define _CPQPHP_H
  30
  31#include "pci_hotplug.h"
  32#include <asm/io.h>             /* for read? and write? functions */
  33#include <linux/delay.h>        /* for delays */
  34
  35#if !defined(CONFIG_HOTPLUG_PCI_COMPAQ_MODULE)
  36        #define MY_NAME "cpqphp.o"
  37#else
  38        #define MY_NAME THIS_MODULE->name
  39#endif
  40
  41#define dbg(fmt, arg...) do { if (cpqhp_debug) printk(KERN_DEBUG "%s: " fmt , MY_NAME , ## arg); } while (0)
  42#define err(format, arg...) printk(KERN_ERR "%s: " format , MY_NAME , ## arg)
  43#define info(format, arg...) printk(KERN_INFO "%s: " format , MY_NAME , ## arg)
  44#define warn(format, arg...) printk(KERN_WARNING "%s: " format , MY_NAME , ## arg)
  45
  46
  47
  48struct smbios_system_slot {
  49        u8 type;
  50        u8 length;
  51        u16 handle;
  52        u8 name_string_num;
  53        u8 slot_type;
  54        u8 slot_width;
  55        u8 slot_current_usage;
  56        u8 slot_length;
  57        u16 slot_number;
  58        u8 properties1;
  59        u8 properties2;
  60} __attribute__ ((packed));
  61
  62/* offsets to the smbios generic type based on the above structure layout */
  63enum smbios_system_slot_offsets {
  64        SMBIOS_SLOT_GENERIC_TYPE =      offsetof(struct smbios_system_slot, type),
  65        SMBIOS_SLOT_GENERIC_LENGTH =    offsetof(struct smbios_system_slot, length),
  66        SMBIOS_SLOT_GENERIC_HANDLE =    offsetof(struct smbios_system_slot, handle),
  67        SMBIOS_SLOT_NAME_STRING_NUM =   offsetof(struct smbios_system_slot, name_string_num),
  68        SMBIOS_SLOT_TYPE =              offsetof(struct smbios_system_slot, slot_type),
  69        SMBIOS_SLOT_WIDTH =             offsetof(struct smbios_system_slot, slot_width),
  70        SMBIOS_SLOT_CURRENT_USAGE =     offsetof(struct smbios_system_slot, slot_current_usage),
  71        SMBIOS_SLOT_LENGTH =            offsetof(struct smbios_system_slot, slot_length),
  72        SMBIOS_SLOT_NUMBER =            offsetof(struct smbios_system_slot, slot_number),
  73        SMBIOS_SLOT_PROPERTIES1 =       offsetof(struct smbios_system_slot, properties1),
  74        SMBIOS_SLOT_PROPERTIES2 =       offsetof(struct smbios_system_slot, properties2),
  75};
  76
  77struct smbios_generic {
  78        u8 type;
  79        u8 length;
  80        u16 handle;
  81} __attribute__ ((packed));
  82
  83/* offsets to the smbios generic type based on the above structure layout */
  84enum smbios_generic_offsets {
  85        SMBIOS_GENERIC_TYPE =   offsetof(struct smbios_generic, type),
  86        SMBIOS_GENERIC_LENGTH = offsetof(struct smbios_generic, length),
  87        SMBIOS_GENERIC_HANDLE = offsetof(struct smbios_generic, handle),
  88};
  89
  90struct smbios_entry_point {
  91        char anchor[4];
  92        u8 ep_checksum;
  93        u8 ep_length;
  94        u8 major_version;
  95        u8 minor_version;
  96        u16 max_size_entry;
  97        u8 ep_rev;
  98        u8 reserved[5];
  99        char int_anchor[5];
 100        u8 int_checksum;
 101        u16 st_length;
 102        u32 st_address;
 103        u16 number_of_entrys;
 104        u8 bcd_rev;
 105} __attribute__ ((packed));
 106
 107/* offsets to the smbios entry point based on the above structure layout */
 108enum smbios_entry_point_offsets {
 109        ANCHOR =                offsetof(struct smbios_entry_point, anchor[0]),
 110        EP_CHECKSUM =           offsetof(struct smbios_entry_point, ep_checksum),
 111        EP_LENGTH =             offsetof(struct smbios_entry_point, ep_length),
 112        MAJOR_VERSION =         offsetof(struct smbios_entry_point, major_version),
 113        MINOR_VERSION =         offsetof(struct smbios_entry_point, minor_version),
 114        MAX_SIZE_ENTRY =        offsetof(struct smbios_entry_point, max_size_entry),
 115        EP_REV =                offsetof(struct smbios_entry_point, ep_rev),
 116        INT_ANCHOR =            offsetof(struct smbios_entry_point, int_anchor[0]),
 117        INT_CHECKSUM =          offsetof(struct smbios_entry_point, int_checksum),
 118        ST_LENGTH =             offsetof(struct smbios_entry_point, st_length),
 119        ST_ADDRESS =            offsetof(struct smbios_entry_point, st_address),
 120        NUMBER_OF_ENTRYS =      offsetof(struct smbios_entry_point, number_of_entrys),
 121        BCD_REV =               offsetof(struct smbios_entry_point, bcd_rev),
 122};
 123
 124struct ctrl_reg {                       /* offset */
 125        u8      slot_RST;               /* 0x00 */
 126        u8      slot_enable;            /* 0x01 */
 127        u16     misc;                   /* 0x02 */
 128        u32     led_control;            /* 0x04 */
 129        u32     int_input_clear;        /* 0x08 */
 130        u32     int_mask;               /* 0x0a */
 131        u8      reserved0;              /* 0x10 */
 132        u8      reserved1;              /* 0x11 */
 133        u8      reserved2;              /* 0x12 */
 134        u8      gen_output_AB;          /* 0x13 */
 135        u32     non_int_input;          /* 0x14 */
 136        u32     reserved3;              /* 0x18 */
 137        u32     reserved4;              /* 0x1a */
 138        u32     reserved5;              /* 0x20 */
 139        u8      reserved6;              /* 0x24 */
 140        u8      reserved7;              /* 0x25 */
 141        u16     reserved8;              /* 0x26 */
 142        u8      slot_mask;              /* 0x28 */
 143        u8      reserved9;              /* 0x29 */
 144        u8      reserved10;             /* 0x2a */
 145        u8      reserved11;             /* 0x2b */
 146        u8      slot_SERR;              /* 0x2c */
 147        u8      slot_power;             /* 0x2d */
 148        u8      reserved12;             /* 0x2e */
 149        u8      reserved13;             /* 0x2f */
 150        u8      next_curr_freq;         /* 0x30 */
 151        u8      reset_freq_mode;        /* 0x31 */
 152} __attribute__ ((packed));
 153
 154/* offsets to the controller registers based on the above structure layout */
 155enum ctrl_offsets {
 156        SLOT_RST =              offsetof(struct ctrl_reg, slot_RST),
 157        SLOT_ENABLE =           offsetof(struct ctrl_reg, slot_enable),
 158        MISC =                  offsetof(struct ctrl_reg, misc),
 159        LED_CONTROL =           offsetof(struct ctrl_reg, led_control),
 160        INT_INPUT_CLEAR =       offsetof(struct ctrl_reg, int_input_clear),
 161        INT_MASK =              offsetof(struct ctrl_reg, int_mask),
 162        CTRL_RESERVED0 =        offsetof(struct ctrl_reg, reserved0),
 163        CTRL_RESERVED1 =        offsetof(struct ctrl_reg, reserved1),
 164        CTRL_RESERVED2 =        offsetof(struct ctrl_reg, reserved1),
 165        GEN_OUTPUT_AB =         offsetof(struct ctrl_reg, gen_output_AB),
 166        NON_INT_INPUT =         offsetof(struct ctrl_reg, non_int_input),
 167        CTRL_RESERVED3 =        offsetof(struct ctrl_reg, reserved3),
 168        CTRL_RESERVED4 =        offsetof(struct ctrl_reg, reserved4),
 169        CTRL_RESERVED5 =        offsetof(struct ctrl_reg, reserved5),
 170        CTRL_RESERVED6 =        offsetof(struct ctrl_reg, reserved6),
 171        CTRL_RESERVED7 =        offsetof(struct ctrl_reg, reserved7),
 172        CTRL_RESERVED8 =        offsetof(struct ctrl_reg, reserved8),
 173        SLOT_MASK =             offsetof(struct ctrl_reg, slot_mask),
 174        CTRL_RESERVED9 =        offsetof(struct ctrl_reg, reserved9),
 175        CTRL_RESERVED10 =       offsetof(struct ctrl_reg, reserved10),
 176        CTRL_RESERVED11 =       offsetof(struct ctrl_reg, reserved11),
 177        SLOT_SERR =             offsetof(struct ctrl_reg, slot_SERR),
 178        SLOT_POWER =            offsetof(struct ctrl_reg, slot_power),
 179        NEXT_CURR_FREQ =        offsetof(struct ctrl_reg, next_curr_freq),
 180        RESET_FREQ_MODE =       offsetof(struct ctrl_reg, reset_freq_mode),
 181};
 182
 183struct hrt {
 184        char sig0;
 185        char sig1;
 186        char sig2;
 187        char sig3;
 188        u16 unused_IRQ;
 189        u16 PCIIRQ;
 190        u8 number_of_entries;
 191        u8 revision;
 192        u16 reserved1;
 193        u32 reserved2;
 194} __attribute__ ((packed));
 195
 196/* offsets to the hotplug resource table registers based on the above structure layout */
 197enum hrt_offsets {
 198        SIG0 =                  offsetof(struct hrt, sig0),
 199        SIG1 =                  offsetof(struct hrt, sig1),
 200        SIG2 =                  offsetof(struct hrt, sig2),
 201        SIG3 =                  offsetof(struct hrt, sig3),
 202        UNUSED_IRQ =            offsetof(struct hrt, unused_IRQ),
 203        PCIIRQ =                offsetof(struct hrt, PCIIRQ),
 204        NUMBER_OF_ENTRIES =     offsetof(struct hrt, number_of_entries),
 205        REVISION =              offsetof(struct hrt, revision),
 206        HRT_RESERVED1 =         offsetof(struct hrt, reserved1),
 207        HRT_RESERVED2 =         offsetof(struct hrt, reserved2),
 208};
 209
 210struct slot_rt {
 211        u8 dev_func;
 212        u8 primary_bus;
 213        u8 secondary_bus;
 214        u8 max_bus;
 215        u16 io_base;
 216        u16 io_length;
 217        u16 mem_base;
 218        u16 mem_length;
 219        u16 pre_mem_base;
 220        u16 pre_mem_length;
 221} __attribute__ ((packed));
 222
 223/* offsets to the hotplug slot resource table registers based on the above structure layout */
 224enum slot_rt_offsets {
 225        DEV_FUNC =              offsetof(struct slot_rt, dev_func),
 226        PRIMARY_BUS =           offsetof(struct slot_rt, primary_bus),
 227        SECONDARY_BUS =         offsetof(struct slot_rt, secondary_bus),
 228        MAX_BUS =               offsetof(struct slot_rt, max_bus),
 229        IO_BASE =               offsetof(struct slot_rt, io_base),
 230        IO_LENGTH =             offsetof(struct slot_rt, io_length),
 231        MEM_BASE =              offsetof(struct slot_rt, mem_base),
 232        MEM_LENGTH =            offsetof(struct slot_rt, mem_length),
 233        PRE_MEM_BASE =          offsetof(struct slot_rt, pre_mem_base),
 234        PRE_MEM_LENGTH =        offsetof(struct slot_rt, pre_mem_length),
 235};
 236
 237struct pci_func {
 238        struct pci_func *next;
 239        u8 bus;
 240        u8 device;
 241        u8 function;
 242        u8 is_a_board;
 243        u16 status;
 244        u8 configured;
 245        u8 switch_save;
 246        u8 presence_save;
 247        u32 base_length[0x06];
 248        u8 base_type[0x06];
 249        u16 reserved2;
 250        u32 config_space[0x20];
 251        struct pci_resource *mem_head;
 252        struct pci_resource *p_mem_head;
 253        struct pci_resource *io_head;
 254        struct pci_resource *bus_head;
 255        struct timer_list *p_task_event;
 256        struct pci_dev* pci_dev;
 257};
 258
 259#define SLOT_MAGIC      0x67267321
 260struct slot {
 261        u32 magic;
 262        struct slot *next;
 263        u8 bus;
 264        u8 device;
 265        u8 number;
 266        u8 is_a_board;
 267        u8 configured;
 268        u8 state;
 269        u8 switch_save;
 270        u8 presence_save;
 271        u32 capabilities;
 272        u16 reserved2;
 273        struct timer_list task_event;
 274        u8 hp_slot;
 275        struct controller *ctrl;
 276        void *p_sm_slot;
 277        struct hotplug_slot *hotplug_slot;
 278};
 279
 280struct pci_resource {
 281        struct pci_resource * next;
 282        u32 base;
 283        u32 length;
 284};
 285
 286struct event_info {
 287        u32 event_type;
 288        u8 hp_slot;
 289};
 290
 291struct controller {
 292        struct controller *next;
 293        u32 ctrl_int_comp;
 294        struct semaphore crit_sect;     /* critical section semaphore */
 295        void *hpc_reg;                  /* cookie for our pci controller location */
 296        struct pci_resource *mem_head;
 297        struct pci_resource *p_mem_head;
 298        struct pci_resource *io_head;
 299        struct pci_resource *bus_head;
 300        struct pci_dev *pci_dev;
 301        struct pci_ops *pci_ops;
 302        struct proc_dir_entry* proc_entry;
 303        struct proc_dir_entry* proc_entry2;
 304        struct event_info event_queue[10];
 305        struct slot *slot;
 306        u8 next_event;
 307        u8 interrupt;
 308        u8 bus;
 309        u8 device;
 310        u8 function;
 311        u8 rev;
 312        u8 slot_device_offset;
 313        u8 first_slot;
 314        u8 add_support;
 315        u8 push_flag;
 316        enum pci_bus_speed speed;
 317        enum pci_bus_speed speed_capability;
 318        u8 push_button;                 /* 0 = no pushbutton, 1 = pushbutton present */
 319        u8 slot_switch_type;            /* 0 = no switch, 1 = switch present */
 320        u8 defeature_PHP;               /* 0 = PHP not supported, 1 = PHP supported */
 321        u8 alternate_base_address;      /* 0 = not supported, 1 = supported */
 322        u8 pci_config_space;            /* Index/data access to working registers 0 = not supported, 1 = supported */
 323        u8 pcix_speed_capability;       /* PCI-X */
 324        u8 pcix_support;                /* PCI-X */
 325        u16 vendor_id;
 326        char proc_name[20];
 327        char proc_name2[20];
 328        struct tq_struct int_task_event;
 329        wait_queue_head_t queue;        /* sleep & wake process */
 330};
 331
 332struct irq_mapping {
 333        u8 barber_pole;
 334        u8 valid_INT;
 335        u8 interrupt[4];
 336};
 337
 338struct resource_lists {
 339        struct pci_resource *mem_head;
 340        struct pci_resource *p_mem_head;
 341        struct pci_resource *io_head;
 342        struct pci_resource *bus_head;
 343        struct irq_mapping *irqs;
 344};
 345
 346#define ROM_PHY_ADDR                    0x0F0000
 347#define ROM_PHY_LEN                     0x00ffff
 348
 349#define PCI_HPC_ID                      0xA0F7
 350#define PCI_SUB_HPC_ID                  0xA2F7
 351#define PCI_SUB_HPC_ID2                 0xA2F8
 352#define PCI_SUB_HPC_ID3                 0xA2F9
 353#define PCI_SUB_HPC_ID_INTC             0xA2FA
 354#define PCI_SUB_HPC_ID4                 0xA2FD
 355
 356#define INT_BUTTON_IGNORE               0
 357#define INT_PRESENCE_ON                 1
 358#define INT_PRESENCE_OFF                2
 359#define INT_SWITCH_CLOSE                3
 360#define INT_SWITCH_OPEN                 4
 361#define INT_POWER_FAULT                 5
 362#define INT_POWER_FAULT_CLEAR           6
 363#define INT_BUTTON_PRESS                7
 364#define INT_BUTTON_RELEASE              8
 365#define INT_BUTTON_CANCEL               9
 366
 367#define STATIC_STATE                    0
 368#define BLINKINGON_STATE                1
 369#define BLINKINGOFF_STATE               2
 370#define POWERON_STATE                   3
 371#define POWEROFF_STATE                  4
 372
 373#define PCISLOT_INTERLOCK_CLOSED        0x00000001
 374#define PCISLOT_ADAPTER_PRESENT         0x00000002
 375#define PCISLOT_POWERED                 0x00000004
 376#define PCISLOT_66_MHZ_OPERATION        0x00000008
 377#define PCISLOT_64_BIT_OPERATION        0x00000010
 378#define PCISLOT_REPLACE_SUPPORTED       0x00000020
 379#define PCISLOT_ADD_SUPPORTED           0x00000040
 380#define PCISLOT_INTERLOCK_SUPPORTED     0x00000080
 381#define PCISLOT_66_MHZ_SUPPORTED        0x00000100
 382#define PCISLOT_64_BIT_SUPPORTED        0x00000200
 383
 384
 385
 386#define PCI_TO_PCI_BRIDGE_CLASS         0x00060400
 387
 388
 389#define INTERLOCK_OPEN                  0x00000002
 390#define ADD_NOT_SUPPORTED               0x00000003
 391#define CARD_FUNCTIONING                0x00000005
 392#define ADAPTER_NOT_SAME                0x00000006
 393#define NO_ADAPTER_PRESENT              0x00000009
 394#define NOT_ENOUGH_RESOURCES            0x0000000B
 395#define DEVICE_TYPE_NOT_SUPPORTED       0x0000000C
 396#define POWER_FAILURE                   0x0000000E
 397
 398#define REMOVE_NOT_SUPPORTED            0x00000003
 399
 400
 401/*
 402 * error Messages
 403 */
 404#define msg_initialization_err  "Initialization failure, error=%d\n"
 405#define msg_HPC_rev_error       "Unsupported revision of the PCI hot plug controller found.\n"
 406#define msg_HPC_non_compaq_or_intel     "The PCI hot plug controller is not supported by this driver.\n"
 407#define msg_HPC_not_supported   "this system is not supported by this version of cpqphpd. Upgrade to a newer version of cpqphpd\n"
 408#define msg_unable_to_save      "unable to store PCI hot plug add resource information. This system must be rebooted before adding any PCI devices.\n"
 409#define msg_button_on           "PCI slot #%d - powering on due to button press.\n"
 410#define msg_button_off          "PCI slot #%d - powering off due to button press.\n"
 411#define msg_button_cancel       "PCI slot #%d - action canceled due to button press.\n"
 412#define msg_button_ignore       "PCI slot #%d - button press ignored.  (action in progress...)\n"
 413
 414
 415/* Proc functions for the hotplug controller info */
 416#ifdef CONFIG_PROC_FS
 417extern int cpqhp_proc_init_ctrl         (void);
 418extern int cpqhp_proc_destroy_ctrl      (void);
 419extern int cpqhp_proc_create_ctrl       (struct controller *ctrl);
 420extern int cpqhp_proc_remove_ctrl       (struct controller *ctrl);
 421#else
 422static inline int cpqhp_proc_init_ctrl (void)
 423{
 424        return 0;
 425}
 426static inline int cpqhp_proc_destroy_ctrl (void)
 427{
 428        return 0;
 429}
 430static inline int cpqhp_proc_create_ctrl (struct controller *ctrl)
 431{
 432        return 0;
 433}
 434static inline int cpqhp_proc_remove_ctrl (struct controller *ctrl)
 435{
 436        return 0;
 437}
 438#endif
 439
 440
 441/* controller functions */
 442extern void     cpqhp_pushbutton_thread         (unsigned long event_pointer);
 443extern void     cpqhp_ctrl_intr                 (int IRQ, struct controller *ctrl_input, struct pt_regs *regs);
 444extern int      cpqhp_find_available_resources  (struct controller *ctrl, void *rom_start);
 445extern int      cpqhp_event_start_thread        (void);
 446extern void     cpqhp_event_stop_thread         (void);
 447extern struct pci_func *cpqhp_slot_create       (unsigned char busnumber);
 448extern struct pci_func *cpqhp_slot_find         (unsigned char bus, unsigned char device, unsigned char index);
 449extern int      cpqhp_process_SI                (struct controller *ctrl, struct pci_func *func);
 450extern int      cpqhp_process_SS                (struct controller *ctrl, struct pci_func *func);
 451extern int      cpqhp_hardware_test             (struct controller *ctrl, int test_num);
 452
 453/* resource functions */
 454extern int      cpqhp_resource_sort_and_combine (struct pci_resource **head);
 455
 456/* pci functions */
 457extern int      cpqhp_set_irq                   (u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num);
 458extern int      cpqhp_get_bus_dev               (struct controller *ctrl, u8 *bus_num, u8 *dev_num, u8 slot);
 459extern int      cpqhp_save_config               (struct controller *ctrl, int busnumber, int is_hot_plug);
 460extern int      cpqhp_save_base_addr_length     (struct controller *ctrl, struct pci_func * func);
 461extern int      cpqhp_save_used_resources       (struct controller *ctrl, struct pci_func * func);
 462extern int      cpqhp_configure_board           (struct controller *ctrl, struct pci_func * func);
 463extern int      cpqhp_save_slot_config          (struct controller *ctrl, struct pci_func * new_slot);
 464extern int      cpqhp_valid_replace             (struct controller *ctrl, struct pci_func * func);
 465extern void     cpqhp_destroy_board_resources   (struct pci_func * func);
 466extern int      cpqhp_return_board_resources    (struct pci_func * func, struct resource_lists * resources);
 467extern void     cpqhp_destroy_resource_list     (struct resource_lists * resources);
 468extern int      cpqhp_configure_device          (struct controller* ctrl, struct pci_func* func);
 469extern int      cpqhp_unconfigure_device        (struct pci_func* func);
 470extern struct slot *cpqhp_find_slot             (struct controller *ctrl, u8 device);
 471
 472
 473/* Global variables */
 474extern int cpqhp_debug;
 475extern struct controller *cpqhp_ctrl_list;
 476extern struct pci_func *cpqhp_slot_list[256];
 477
 478/* these can be gotten rid of, but for debugging they are purty */
 479extern u8 cpqhp_nic_irq;
 480extern u8 cpqhp_disk_irq;
 481
 482
 483
 484
 485/* Inline functions to check the sanity of a pointer that is passed to us */
 486static inline int slot_paranoia_check (struct slot *slot, const char *function)
 487{
 488        if (!slot) {
 489                dbg("%s - slot == NULL", function);
 490                return -1;
 491        }
 492        if (slot->magic != SLOT_MAGIC) {
 493                dbg("%s - bad magic number for slot", function);
 494                return -1;
 495        }
 496        if (!slot->hotplug_slot) {
 497                dbg("%s - slot->hotplug_slot == NULL!", function);
 498                return -1;
 499        }
 500        return 0;
 501}
 502
 503static inline struct slot *get_slot (struct hotplug_slot *hotplug_slot, const char *function)
 504{ 
 505        struct slot *slot;
 506
 507        if (!hotplug_slot) {
 508                dbg("%s - hotplug_slot == NULL\n", function);
 509                return NULL;
 510        }
 511
 512        slot = (struct slot *)hotplug_slot->private;
 513        if (slot_paranoia_check (slot, function))
 514                return NULL;
 515        return slot;
 516}               
 517
 518/*
 519 * return_resource
 520 *
 521 * Puts node back in the resource list pointed to by head
 522 *
 523 */
 524static inline void return_resource (struct pci_resource **head, struct pci_resource *node)
 525{
 526        if (!node || !head)
 527                return;
 528        node->next = *head;
 529        *head = node;
 530}
 531
 532static inline void set_SOGO (struct controller *ctrl)
 533{
 534        u16 misc;
 535        
 536        misc = readw(ctrl->hpc_reg + MISC);
 537        misc = (misc | 0x0001) & 0xFFFB;
 538        writew(misc, ctrl->hpc_reg + MISC);
 539}
 540
 541
 542static inline void amber_LED_on (struct controller *ctrl, u8 slot)
 543{
 544        u32 led_control;
 545        
 546        led_control = readl(ctrl->hpc_reg + LED_CONTROL);
 547        led_control |= (0x01010000L << slot);
 548        writel(led_control, ctrl->hpc_reg + LED_CONTROL);
 549}
 550
 551
 552static inline void amber_LED_off (struct controller *ctrl, u8 slot)
 553{
 554        u32 led_control;
 555        
 556        led_control = readl(ctrl->hpc_reg + LED_CONTROL);
 557        led_control &= ~(0x01010000L << slot);
 558        writel(led_control, ctrl->hpc_reg + LED_CONTROL);
 559}
 560
 561
 562static inline int read_amber_LED (struct controller *ctrl, u8 slot)
 563{
 564        u32 led_control;
 565
 566        led_control = readl(ctrl->hpc_reg + LED_CONTROL);
 567        led_control &= (0x01010000L << slot);
 568        
 569        return led_control ? 1 : 0;
 570}
 571
 572
 573static inline void green_LED_on (struct controller *ctrl, u8 slot)
 574{
 575        u32 led_control;
 576        
 577        led_control = readl(ctrl->hpc_reg + LED_CONTROL);
 578        led_control |= 0x0101L << slot;
 579        writel(led_control, ctrl->hpc_reg + LED_CONTROL);
 580}
 581
 582static inline void green_LED_off (struct controller *ctrl, u8 slot)
 583{
 584        u32 led_control;
 585        
 586        led_control = readl(ctrl->hpc_reg + LED_CONTROL);
 587        led_control &= ~(0x0101L << slot);
 588        writel(led_control, ctrl->hpc_reg + LED_CONTROL);
 589}
 590
 591
 592static inline void green_LED_blink (struct controller *ctrl, u8 slot)
 593{
 594        u32 led_control;
 595        
 596        led_control = readl(ctrl->hpc_reg + LED_CONTROL);
 597        led_control &= ~(0x0101L << slot);
 598        led_control |= (0x0001L << slot);
 599        writel(led_control, ctrl->hpc_reg + LED_CONTROL);
 600}
 601
 602
 603static inline void slot_disable (struct controller *ctrl, u8 slot)
 604{
 605        u8 slot_enable;
 606
 607        slot_enable = readb(ctrl->hpc_reg + SLOT_ENABLE);
 608        slot_enable &= ~(0x01 << slot);
 609        writeb(slot_enable, ctrl->hpc_reg + SLOT_ENABLE);
 610}
 611
 612
 613static inline void slot_enable (struct controller *ctrl, u8 slot)
 614{
 615        u8 slot_enable;
 616
 617        slot_enable = readb(ctrl->hpc_reg + SLOT_ENABLE);
 618        slot_enable |= (0x01 << slot);
 619        writeb(slot_enable, ctrl->hpc_reg + SLOT_ENABLE);
 620}
 621
 622
 623static inline u8 is_slot_enabled (struct controller *ctrl, u8 slot)
 624{
 625        u8 slot_enable;
 626
 627        slot_enable = readb(ctrl->hpc_reg + SLOT_ENABLE);
 628        slot_enable &= (0x01 << slot);
 629        return slot_enable ? 1 : 0;
 630}
 631
 632
 633static inline u8 read_slot_enable (struct controller *ctrl)
 634{
 635        return readb(ctrl->hpc_reg + SLOT_ENABLE);
 636}
 637
 638
 639/*
 640 * get_controller_speed - find the current frequency/mode of controller.
 641 *
 642 * @ctrl: controller to get frequency/mode for.
 643 *
 644 * Returns controller speed.
 645 *
 646 */
 647static inline u8 get_controller_speed (struct controller *ctrl)
 648{
 649        u8 curr_freq;
 650        u16 misc;
 651        
 652        if (ctrl->pcix_support) {
 653                curr_freq = readb(ctrl->hpc_reg + NEXT_CURR_FREQ);
 654                if ((curr_freq & 0xB0) == 0xB0) 
 655                        return PCI_SPEED_133MHz_PCIX;
 656                if ((curr_freq & 0xA0) == 0xA0)
 657                        return PCI_SPEED_100MHz_PCIX;
 658                if ((curr_freq & 0x90) == 0x90)
 659                        return PCI_SPEED_66MHz_PCIX;
 660                if (curr_freq & 0x10)
 661                        return PCI_SPEED_66MHz;
 662
 663                return PCI_SPEED_33MHz;
 664        }
 665
 666        misc = readw(ctrl->hpc_reg + MISC);
 667        return (misc & 0x0800) ? PCI_SPEED_66MHz : PCI_SPEED_33MHz;
 668}
 669
 670/*
 671 * get_adapter_speed - find the max supported frequency/mode of adapter.
 672 *
 673 * @ctrl: hotplug controller.
 674 * @hp_slot: hotplug slot where adapter is installed.
 675 *
 676 * Returns adapter speed.
 677 *
 678 */
 679static inline u8 get_adapter_speed (struct controller *ctrl, u8 hp_slot)
 680{
 681        u32 temp_dword = readl(ctrl->hpc_reg + NON_INT_INPUT);
 682        dbg("slot: %d, PCIXCAP: %8x\n", hp_slot, temp_dword);
 683        if (ctrl->pcix_support) {
 684                if (temp_dword & (0x10000 << hp_slot))
 685                        return PCI_SPEED_133MHz_PCIX;
 686                if (temp_dword & (0x100 << hp_slot))
 687                        return PCI_SPEED_66MHz_PCIX;
 688        }
 689
 690        if (temp_dword & (0x01 << hp_slot))
 691                return PCI_SPEED_66MHz;
 692
 693        return PCI_SPEED_33MHz;
 694}
 695
 696static inline void enable_slot_power (struct controller *ctrl, u8 slot)
 697{
 698        u8 slot_power;
 699
 700        slot_power = readb(ctrl->hpc_reg + SLOT_POWER);
 701        slot_power |= (0x01 << slot);
 702        writeb(slot_power, ctrl->hpc_reg + SLOT_POWER);
 703}
 704
 705static inline void disable_slot_power (struct controller *ctrl, u8 slot)
 706{
 707        u8 slot_power;
 708
 709        slot_power = readb(ctrl->hpc_reg + SLOT_POWER);
 710        slot_power &= ~(0x01 << slot);
 711        writeb(slot_power, ctrl->hpc_reg + SLOT_POWER);
 712}
 713
 714
 715static inline int cpq_get_attention_status (struct controller *ctrl, struct slot *slot)
 716{
 717        u8 hp_slot;
 718
 719        if (slot == NULL)
 720                return 1;
 721
 722        hp_slot = slot->device - ctrl->slot_device_offset;
 723
 724        return read_amber_LED (ctrl, hp_slot);
 725}
 726
 727
 728static inline int get_slot_enabled (struct controller *ctrl, struct slot *slot)
 729{
 730        u8 hp_slot;
 731
 732        if (slot == NULL)
 733                return 1;
 734
 735        hp_slot = slot->device - ctrl->slot_device_offset;
 736
 737        return is_slot_enabled (ctrl, hp_slot);
 738}
 739
 740
 741static inline int cpq_get_latch_status (struct controller *ctrl, struct slot *slot)
 742{
 743        u32 status;
 744        u8 hp_slot;
 745
 746        if (slot == NULL)
 747                return 1;
 748
 749        hp_slot = slot->device - ctrl->slot_device_offset;
 750        dbg("%s: slot->device = %d, ctrl->slot_device_offset = %d \n", __FUNCTION__, slot->device, ctrl->slot_device_offset);
 751
 752        status = (readl(ctrl->hpc_reg + INT_INPUT_CLEAR) & (0x01L << hp_slot));
 753
 754        return(status == 0) ? 1 : 0;
 755}
 756
 757
 758static inline int get_presence_status (struct controller *ctrl, struct slot *slot)
 759{
 760        int presence_save = 0;
 761        u8 hp_slot;
 762        u32 tempdword;
 763
 764        if (slot == NULL)
 765                return 0;
 766
 767        hp_slot = slot->device - ctrl->slot_device_offset;
 768
 769        tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
 770        presence_save = (int) ((((~tempdword) >> 23) | ((~tempdword) >> 15)) >> hp_slot) & 0x02;
 771
 772        return presence_save;
 773}
 774
 775#define SLOT_NAME_SIZE 10
 776
 777static inline void make_slot_name (char *buffer, int buffer_size, struct slot *slot)
 778{
 779        snprintf (buffer, buffer_size, "%d", slot->number);
 780}
 781
 782
 783static inline int wait_for_ctrl_irq (struct controller *ctrl)
 784{
 785        DECLARE_WAITQUEUE(wait, current);
 786        int retval = 0;
 787
 788        dbg("%s - start\n", __FUNCTION__);
 789        add_wait_queue(&ctrl->queue, &wait);
 790        set_current_state(TASK_INTERRUPTIBLE);
 791        /* Sleep for up to 1 second to wait for the LED to change. */
 792        schedule_timeout(1*HZ);
 793        set_current_state(TASK_RUNNING);
 794        remove_wait_queue(&ctrl->queue, &wait);
 795        if (signal_pending(current))
 796                retval =  -EINTR;
 797
 798        dbg("%s - end\n", __FUNCTION__);
 799        return retval;
 800}
 801
 802/**
 803 * set_controller_speed - set the frequency and/or mode of a specific
 804 * controller segment.
 805 *
 806 * @ctrl: controller to change frequency/mode for.
 807 * @adapter_speed: the speed of the adapter we want to match.
 808 * @hp_slot: the slot number where the adapter is installed.
 809 *
 810 * Returns 0 if we successfully change frequency and/or mode to match the
 811 * adapter speed.
 812 * 
 813 */
 814static inline u8 set_controller_speed(struct controller *ctrl, u8 adapter_speed, u8 hp_slot)
 815{
 816        struct slot *slot;
 817        u8 reg;
 818        u8 slot_power = readb(ctrl->hpc_reg + SLOT_POWER);
 819        u16 reg16;
 820        u32 leds = readl(ctrl->hpc_reg + LED_CONTROL);
 821        
 822        if (ctrl->speed == adapter_speed)
 823                return 0;
 824        
 825        /* We don't allow freq/mode changes if we find another adapter running
 826         * in another slot on this controller */
 827        for(slot = ctrl->slot; slot; slot = slot->next) {
 828                if (slot->device == (hp_slot + ctrl->slot_device_offset)) 
 829                        continue;
 830                if (!slot->hotplug_slot && !slot->hotplug_slot->info) 
 831                        continue;
 832                if (slot->hotplug_slot->info->adapter_status == 0) 
 833                        continue;
 834                /* If another adapter is running on the same segment but at a
 835                 * lower speed/mode, we allow the new adapter to function at
 836                 * this rate if supported */
 837                if (ctrl->speed < adapter_speed) 
 838                        return 0;
 839
 840                return 1;
 841        }
 842        
 843        /* If the controller doesn't support freq/mode changes and the
 844         * controller is running at a higher mode, we bail */
 845        if ((ctrl->speed > adapter_speed) && (!ctrl->pcix_speed_capability))
 846                return 1;
 847        
 848        /* But we allow the adapter to run at a lower rate if possible */
 849        if ((ctrl->speed < adapter_speed) && (!ctrl->pcix_speed_capability))
 850                return 0;
 851
 852        /* We try to set the max speed supported by both the adapter and
 853         * controller */
 854        if (ctrl->speed_capability < adapter_speed) {
 855                if (ctrl->speed == ctrl->speed_capability)
 856                        return 0;
 857                adapter_speed = ctrl->speed_capability;
 858        }
 859
 860        writel(0x0L, ctrl->hpc_reg + LED_CONTROL);
 861        writeb(0x00, ctrl->hpc_reg + SLOT_ENABLE);
 862        
 863        set_SOGO(ctrl); 
 864        wait_for_ctrl_irq(ctrl);
 865        
 866        if (adapter_speed != PCI_SPEED_133MHz_PCIX)
 867                reg = 0xF5;
 868        else
 869                reg = 0xF4;     
 870        pci_write_config_byte(ctrl->pci_dev, 0x41, reg);
 871        
 872        reg16 = readw(ctrl->hpc_reg + NEXT_CURR_FREQ);
 873        reg16 &= ~0x000F;
 874        switch(adapter_speed) {
 875                case(PCI_SPEED_133MHz_PCIX): 
 876                        reg = 0x75;
 877                        reg16 |= 0xB; 
 878                        break;
 879                case(PCI_SPEED_100MHz_PCIX):
 880                        reg = 0x74;
 881                        reg16 |= 0xA;
 882                        break;
 883                case(PCI_SPEED_66MHz_PCIX):
 884                        reg = 0x73;
 885                        reg16 |= 0x9;
 886                        break;
 887                case(PCI_SPEED_66MHz):
 888                        reg = 0x73;
 889                        reg16 |= 0x1;
 890                        break;
 891                default: /* 33MHz PCI 2.2 */
 892                        reg = 0x71;
 893                        break;
 894                        
 895        }
 896        reg16 |= 0xB << 12;
 897        writew(reg16, ctrl->hpc_reg + NEXT_CURR_FREQ);
 898        
 899        mdelay(5); 
 900        
 901        /* Reenable interrupts */
 902        writel(0, ctrl->hpc_reg + INT_MASK);
 903
 904        pci_write_config_byte(ctrl->pci_dev, 0x41, reg); 
 905        
 906        /* Restart state machine */
 907        reg = ~0xF;
 908        pci_read_config_byte(ctrl->pci_dev, 0x43, &reg);
 909        pci_write_config_byte(ctrl->pci_dev, 0x43, reg);
 910        
 911        /* Only if mode change...*/
 912        if (((ctrl->speed == PCI_SPEED_66MHz) && (adapter_speed == PCI_SPEED_66MHz_PCIX)) ||
 913                ((ctrl->speed == PCI_SPEED_66MHz_PCIX) && (adapter_speed == PCI_SPEED_66MHz))) 
 914                        set_SOGO(ctrl);
 915        
 916        wait_for_ctrl_irq(ctrl);
 917        mdelay(1100);
 918        
 919        /* Restore LED/Slot state */
 920        writel(leds, ctrl->hpc_reg + LED_CONTROL);
 921        writeb(slot_power, ctrl->hpc_reg + SLOT_ENABLE);
 922        
 923        set_SOGO(ctrl);
 924        wait_for_ctrl_irq(ctrl);
 925        
 926        ctrl->speed = adapter_speed;
 927        slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 928
 929        info("Successfully changed frequency/mode for adapter in slot %d\n", 
 930                        slot->number);
 931        return 0;
 932}
 933
 934#endif
 935
The original LXR software by the LXR community, this experimental version by lxr@linux.no.