linux/drivers/pcmcia/o2micro.h
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   1/*
   2 * o2micro.h 1.13 1999/10/25 20:03:34
   3 *
   4 * The contents of this file are subject to the Mozilla Public License
   5 * Version 1.1 (the "License"); you may not use this file except in
   6 * compliance with the License. You may obtain a copy of the License
   7 * at http://www.mozilla.org/MPL/
   8 *
   9 * Software distributed under the License is distributed on an "AS IS"
  10 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
  11 * the License for the specific language governing rights and
  12 * limitations under the License. 
  13 *
  14 * The initial developer of the original code is David A. Hinds
  15 * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  16 * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  17 *
  18 * Alternatively, the contents of this file may be used under the
  19 * terms of the GNU General Public License version 2 (the "GPL"), in which
  20 * case the provisions of the GPL are applicable instead of the
  21 * above.  If you wish to allow the use of your version of this file
  22 * only under the terms of the GPL and not to allow others to use
  23 * your version of this file under the MPL, indicate your decision by
  24 * deleting the provisions above and replace them with the notice and
  25 * other provisions required by the GPL.  If you do not delete the
  26 * provisions above, a recipient may use your version of this file
  27 * under either the MPL or the GPL.
  28 */
  29
  30#ifndef _LINUX_O2MICRO_H
  31#define _LINUX_O2MICRO_H
  32
  33/* Additional PCI configuration registers */
  34
  35#define O2_MUX_CONTROL          0x90    /* 32 bit */
  36#define  O2_MUX_RING_OUT        0x0000000f
  37#define  O2_MUX_SKTB_ACTV       0x000000f0
  38#define  O2_MUX_SCTA_ACTV_ENA   0x00000100
  39#define  O2_MUX_SCTB_ACTV_ENA   0x00000200
  40#define  O2_MUX_SER_IRQ_ROUTE   0x0000e000
  41#define  O2_MUX_SER_PCI         0x00010000
  42
  43#define  O2_MUX_SKTA_TURBO      0x000c0000      /* for 6833, 6860 */
  44#define  O2_MUX_SKTB_TURBO      0x00300000
  45#define  O2_MUX_AUX_VCC_3V      0x00400000
  46#define  O2_MUX_PCI_VCC_5V      0x00800000
  47#define  O2_MUX_PME_MUX         0x0f000000
  48
  49/* Additional ExCA registers */
  50
  51#define O2_MODE_A               0x38
  52#define O2_MODE_A_2             0x26    /* for 6833B, 6860C */
  53#define  O2_MODE_A_CD_PULSE     0x04
  54#define  O2_MODE_A_SUSP_EDGE    0x08
  55#define  O2_MODE_A_HOST_SUSP    0x10
  56#define  O2_MODE_A_PWR_MASK     0x60
  57#define  O2_MODE_A_QUIET        0x80
  58
  59#define O2_MODE_B               0x39
  60#define O2_MODE_B_2             0x2e    /* for 6833B, 6860C */
  61#define  O2_MODE_B_IDENT        0x03
  62#define  O2_MODE_B_ID_BSTEP     0x00
  63#define  O2_MODE_B_ID_CSTEP     0x01
  64#define  O2_MODE_B_ID_O2        0x02
  65#define  O2_MODE_B_VS1          0x04
  66#define  O2_MODE_B_VS2          0x08
  67#define  O2_MODE_B_IRQ15_RI     0x80
  68
  69#define O2_MODE_C               0x3a
  70#define  O2_MODE_C_DREQ_MASK    0x03
  71#define  O2_MODE_C_DREQ_INPACK  0x01
  72#define  O2_MODE_C_DREQ_WP      0x02
  73#define  O2_MODE_C_DREQ_BVD2    0x03
  74#define  O2_MODE_C_ZVIDEO       0x08
  75#define  O2_MODE_C_IREQ_SEL     0x30
  76#define  O2_MODE_C_MGMT_SEL     0xc0
  77
  78#define O2_MODE_D               0x3b
  79#define  O2_MODE_D_IRQ_MODE     0x03
  80#define  O2_MODE_D_PCI_CLKRUN   0x04
  81#define  O2_MODE_D_CB_CLKRUN    0x08
  82#define  O2_MODE_D_SKT_ACTV     0x20
  83#define  O2_MODE_D_PCI_FIFO     0x40    /* for OZ6729, OZ6730 */
  84#define  O2_MODE_D_W97_IRQ      0x40
  85#define  O2_MODE_D_ISA_IRQ      0x80
  86
  87#define O2_MHPG_DMA             0x3c
  88#define  O2_MHPG_CHANNEL        0x07
  89#define  O2_MHPG_CINT_ENA       0x08
  90#define  O2_MHPG_CSC_ENA        0x10
  91
  92#define O2_FIFO_ENA             0x3d
  93#define  O2_FIFO_ZVIDEO_3       0x08
  94#define  O2_FIFO_PCI_FIFO       0x10
  95#define  O2_FIFO_POSTWR         0x40
  96#define  O2_FIFO_BUFFER         0x80
  97
  98#define O2_MODE_E               0x3e
  99#define  O2_MODE_E_MHPG_DMA     0x01
 100#define  O2_MODE_E_SPKR_OUT     0x02
 101#define  O2_MODE_E_LED_OUT      0x08
 102#define  O2_MODE_E_SKTA_ACTV    0x10
 103
 104#define O2_RESERVED1            0x94
 105#define O2_RESERVED2            0xD4
 106#define O2_RES_READ_PREFETCH    0x02
 107#define O2_RES_WRITE_BURST      0x08
 108
 109static int o2micro_override(struct yenta_socket *socket)
 110{
 111        /*
 112         * 'reserved' register at 0x94/D4. allows setting read prefetch and write
 113         * bursting. read prefetching for example makes the RME Hammerfall DSP
 114         * working. for some bridges it is at 0x94, for others at 0xD4. it's
 115         * ok to write to both registers on all O2 bridges.
 116         * from Eric Still, 02Micro.
 117         */
 118        u8 a, b;
 119        bool use_speedup;
 120
 121        if (PCI_FUNC(socket->dev->devfn) == 0) {
 122                a = config_readb(socket, O2_RESERVED1);
 123                b = config_readb(socket, O2_RESERVED2);
 124                dev_dbg(&socket->dev->dev, "O2: 0x94/0xD4: %02x/%02x\n", a, b);
 125
 126                switch (socket->dev->device) {
 127                /*
 128                 * older bridges have problems with both read prefetch and write
 129                 * bursting depending on the combination of the chipset, bridge
 130                 * and the cardbus card. so disable them to be on the safe side.
 131                 */
 132                case PCI_DEVICE_ID_O2_6729:
 133                case PCI_DEVICE_ID_O2_6730:
 134                case PCI_DEVICE_ID_O2_6812:
 135                case PCI_DEVICE_ID_O2_6832:
 136                case PCI_DEVICE_ID_O2_6836:
 137                case PCI_DEVICE_ID_O2_6933:
 138                        use_speedup = false;
 139                        break;
 140                default:
 141                        use_speedup = true;
 142                        break;
 143                }
 144
 145                /* the user may override our decision */
 146                if (strcasecmp(o2_speedup, "on") == 0)
 147                        use_speedup = true;
 148                else if (strcasecmp(o2_speedup, "off") == 0)
 149                        use_speedup = false;
 150                else if (strcasecmp(o2_speedup, "default") != 0)
 151                        dev_warn(&socket->dev->dev,
 152                                "O2: Unknown parameter, using 'default'");
 153
 154                if (use_speedup) {
 155                        dev_info(&socket->dev->dev,
 156                                "O2: enabling read prefetch/write burst. If you experience problems or performance issues, use the yenta_socket parameter 'o2_speedup=off'\n");
 157                        config_writeb(socket, O2_RESERVED1,
 158                                      a | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST);
 159                        config_writeb(socket, O2_RESERVED2,
 160                                      b | O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST);
 161                } else {
 162                        dev_info(&socket->dev->dev,
 163                                "O2: disabling read prefetch/write burst. If you experience problems or performance issues, use the yenta_socket parameter 'o2_speedup=on'\n");
 164                        config_writeb(socket, O2_RESERVED1,
 165                                      a & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST));
 166                        config_writeb(socket, O2_RESERVED2,
 167                                      b & ~(O2_RES_READ_PREFETCH | O2_RES_WRITE_BURST));
 168                }
 169        }
 170
 171        return 0;
 172}
 173
 174static void o2micro_restore_state(struct yenta_socket *socket)
 175{
 176        /*
 177         * as long as read prefetch is the only thing in
 178         * o2micro_override, it's safe to call it from here
 179         */
 180        o2micro_override(socket);
 181}
 182
 183#endif /* _LINUX_O2MICRO_H */
 184
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