drivers/ide/pci/cs5535.c

   1 /*
   2  * linux/drivers/ide/pci/cs5535.c
   3  *
   4  * Copyright (C) 2004-2005 Advanced Micro Devices, Inc.
   5  * Copyright (C)      2007 Bartlomiej Zolnierkiewicz
   6  *
   7  * History:
   8  * 09/20/2005 - Jaya Kumar <jayakumar.ide@gmail.com>
   9  * - Reworked tuneproc, set_drive, misc mods to prep for mainline
  10  * - Work was sponsored by CIS (M) Sdn Bhd.
  11  * Ported to Kernel 2.6.11 on June 26, 2005 by
  12  *   Wolfgang Zuleger <wolfgang.zuleger@gmx.de>
  13  *   Alexander Kiausch <alex.kiausch@t-online.de>
  14  * Originally developed by AMD for 2.4/2.6
  15  *
  16  * Development of this chipset driver was funded
  17  * by the nice folks at National Semiconductor/AMD.
  18  *
  19  * This program is free software; you can redistribute it and/or modify it
  20  * under the terms of the GNU General Public License version 2 as published by
  21  * the Free Software Foundation.
  22  *
  23  * Documentation:
  24  *  CS5535 documentation available from AMD
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/pci.h>
  29 #include <linux/ide.h>
  30
  31 #include "ide-timing.h"
  32
  33 #define MSR_ATAC_BASE           0x51300000
  34 #define ATAC_GLD_MSR_CAP        (MSR_ATAC_BASE+0)
  35 #define ATAC_GLD_MSR_CONFIG     (MSR_ATAC_BASE+0x01)
  36 #define ATAC_GLD_MSR_SMI        (MSR_ATAC_BASE+0x02)
  37 #define ATAC_GLD_MSR_ERROR      (MSR_ATAC_BASE+0x03)
  38 #define ATAC_GLD_MSR_PM         (MSR_ATAC_BASE+0x04)
  39 #define ATAC_GLD_MSR_DIAG       (MSR_ATAC_BASE+0x05)
  40 #define ATAC_IO_BAR             (MSR_ATAC_BASE+0x08)
  41 #define ATAC_RESET              (MSR_ATAC_BASE+0x10)
  42 #define ATAC_CH0D0_PIO          (MSR_ATAC_BASE+0x20)
  43 #define ATAC_CH0D0_DMA          (MSR_ATAC_BASE+0x21)
  44 #define ATAC_CH0D1_PIO          (MSR_ATAC_BASE+0x22)
  45 #define ATAC_CH0D1_DMA          (MSR_ATAC_BASE+0x23)
  46 #define ATAC_PCI_ABRTERR        (MSR_ATAC_BASE+0x24)
  47 #define ATAC_BM0_CMD_PRIM       0x00
  48 #define ATAC_BM0_STS_PRIM       0x02
  49 #define ATAC_BM0_PRD            0x04
  50 #define CS5535_CABLE_DETECT     0x48
  51
  52 /* Format I PIO settings. We separate out cmd and data for safer timings */
  53
  54 static unsigned int cs5535_pio_cmd_timings[5] =
  55 { 0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131 };
  56 static unsigned int cs5535_pio_dta_timings[5] =
  57 { 0xF7F4, 0xF173, 0x8141, 0x5131, 0x1131 };
  58
  59 static unsigned int cs5535_mwdma_timings[3] =
  60 { 0x7F0FFFF3, 0x7F035352, 0x7f024241 };
  61
  62 static unsigned int cs5535_udma_timings[5] =
  63 { 0x7F7436A1, 0x7F733481, 0x7F723261, 0x7F713161, 0x7F703061 };
  64
  65 /* Macros to check if the register is the reset value -  reset value is an
  66    invalid timing and indicates the register has not been set previously */
  67
  68 #define CS5535_BAD_PIO(timings) ( (timings&~0x80000000UL) == 0x00009172 )
  69 #define CS5535_BAD_DMA(timings) ( (timings & 0x000FFFFF) == 0x00077771 )
  70
  71 /****
  72  *      cs5535_set_speed         -     Configure the chipset to the new speed
  73  *      @drive: Drive to set up
  74  *      @speed: desired speed
  75  *
  76  *      cs5535_set_speed() configures the chipset to a new speed.
  77  */
  78 static void cs5535_set_speed(ide_drive_t *drive, const u8 speed)
  79 {
  80
  81         u32 reg = 0, dummy;
  82         int unit = drive->select.b.unit;
  83
  84
  85         /* Set the PIO timings */
  86         if ((speed & XFER_MODE) == XFER_PIO) {
  87                 ide_drive_t *pair = ide_get_paired_drive(drive);
  88                 u8 cmd, pioa;
  89
  90                 cmd = pioa = speed - XFER_PIO_0;
  91
  92                 if (pair->present) {
  93                         u8 piob = ide_get_best_pio_mode(pair, 255, 4);
  94
  95                         if (piob < cmd)
  96                                 cmd = piob;
  97                 }
  98
  99                 /* Write the speed of the current drive */
 100                 reg = (cs5535_pio_cmd_timings[cmd] << 16) |
 101                         cs5535_pio_dta_timings[pioa];
 102                 wrmsr(unit ? ATAC_CH0D1_PIO : ATAC_CH0D0_PIO, reg, 0);
 103
 104                 /* And if nessesary - change the speed of the other drive */
 105                 rdmsr(unit ?  ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, dummy);
 106
 107                 if (((reg >> 16) & cs5535_pio_cmd_timings[cmd]) !=
 108                         cs5535_pio_cmd_timings[cmd]) {
 109                         reg &= 0x0000FFFF;
 110                         reg |= cs5535_pio_cmd_timings[cmd] << 16;
 111                         wrmsr(unit ? ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, 0);
 112                 }
 113
 114                 /* Set bit 31 of the DMA register for PIO format 1 timings */
 115                 rdmsr(unit ?  ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy);
 116                 wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA,
 117                                         reg | 0x80000000UL, 0);
 118         } else {
 119                 rdmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy);
 120
 121                 reg &= 0x80000000UL;  /* Preserve the PIO format bit */
 122
 123                 if (speed >= XFER_UDMA_0 && speed <= XFER_UDMA_4)
 124                         reg |= cs5535_udma_timings[speed - XFER_UDMA_0];
 125                 else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
 126                         reg |= cs5535_mwdma_timings[speed - XFER_MW_DMA_0];
 127                 else
 128                         return;
 129
 130                 wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, 0);
 131         }
 132 }
 133
 134 /**
 135  *      cs5535_set_dma_mode     -       set host controller for DMA mode
 136  *      @drive: drive
 137  *      @speed: DMA mode
 138  *
 139  *      Programs the chipset for DMA mode.
 140  */
 141
 142 static void cs5535_set_dma_mode(ide_drive_t *drive, const u8 speed)
 143 {
 144         cs5535_set_speed(drive, speed);
 145 }
 146
 147 /**
 148  *      cs5535_set_pio_mode     -       set host controller for PIO mode
 149  *      @drive: drive
 150  *      @pio: PIO mode number
 151  *
 152  *      A callback from the upper layers for PIO-only tuning.
 153  */
 154
 155 static void cs5535_set_pio_mode(ide_drive_t *drive, const u8 pio)
 156 {
 157         cs5535_set_speed(drive, XFER_PIO_0 + pio);
 158 }
 159
 160 static u8 __devinit cs5535_cable_detect(struct pci_dev *dev)
 161 {
 162         u8 bit;
 163
 164         /* if a 80 wire cable was detected */
 165         pci_read_config_byte(dev, CS5535_CABLE_DETECT, &bit);
 166
 167         return (bit & 1) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
 168 }
 169
 170 /****
 171  *      init_hwif_cs5535        -       Initialize one ide cannel
 172  *      @hwif: Channel descriptor
 173  *
 174  *      This gets invoked by the IDE driver once for each channel. It
 175  *      performs channel-specific pre-initialization before drive probing.
 176  *
 177  */
 178 static void __devinit init_hwif_cs5535(ide_hwif_t *hwif)
 179 {
 180         hwif->set_pio_mode = &cs5535_set_pio_mode;
 181         hwif->set_dma_mode = &cs5535_set_dma_mode;
 182
 183         if (hwif->dma_base == 0)
 184                 return;
 185
 186         hwif->cbl = cs5535_cable_detect(hwif->pci_dev);
 187 }
 188
 189 static const struct ide_port_info cs5535_chipset __devinitdata = {
 190         .name           = "CS5535",
 191         .init_hwif      = init_hwif_cs5535,
 192         .host_flags     = IDE_HFLAG_SINGLE | IDE_HFLAG_POST_SET_MODE |
 193                           IDE_HFLAG_ABUSE_SET_DMA_MODE | IDE_HFLAG_BOOTABLE,
 194         .pio_mask       = ATA_PIO4,
 195         .mwdma_mask     = ATA_MWDMA2,
 196         .udma_mask      = ATA_UDMA4,
 197 };
 198
 199 static int __devinit cs5535_init_one(struct pci_dev *dev,
 200                                         const struct pci_device_id *id)
 201 {
 202         return ide_setup_pci_device(dev, &cs5535_chipset);
 203 }
 204
 205 static const struct pci_device_id cs5535_pci_tbl[] = {
 206         { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_CS5535_IDE), 0 },
 207         { 0, },
 208 };
 209
 210 MODULE_DEVICE_TABLE(pci, cs5535_pci_tbl);
 211
 212 static struct pci_driver driver = {
 213         .name       = "CS5535_IDE",
 214         .id_table   = cs5535_pci_tbl,
 215         .probe      = cs5535_init_one,
 216 };
 217
 218 static int __init cs5535_ide_init(void)
 219 {
 220         return ide_pci_register_driver(&driver);
 221 }
 222
 223 module_init(cs5535_ide_init);
 224
 225 MODULE_AUTHOR("AMD");
 226 MODULE_DESCRIPTION("PCI driver module for AMD/NS CS5535 IDE");
 227 MODULE_LICENSE("GPL");