root/drivers/pcmcia/o2micro.h

INCLUDED FROM

DEFINITIONS

1. o2micro_override
2. o2micro_restore_state

   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 
 109 static 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 
 174 static 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 */