linux/drivers/ide/pci/atiixp.c
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   1/*
   2 *  linux/drivers/ide/pci/atiixp.c      Version 0.03    Aug 3 2007
   3 *
   4 *  Copyright (C) 2003 ATI Inc. <hyu@ati.com>
   5 *  Copyright (C) 2004,2007 Bartlomiej Zolnierkiewicz
   6 */
   7
   8#include <linux/types.h>
   9#include <linux/module.h>
  10#include <linux/kernel.h>
  11#include <linux/ioport.h>
  12#include <linux/pci.h>
  13#include <linux/hdreg.h>
  14#include <linux/ide.h>
  15#include <linux/delay.h>
  16#include <linux/init.h>
  17
  18#include <asm/io.h>
  19
  20#define ATIIXP_IDE_PIO_TIMING           0x40
  21#define ATIIXP_IDE_MDMA_TIMING          0x44
  22#define ATIIXP_IDE_PIO_CONTROL          0x48
  23#define ATIIXP_IDE_PIO_MODE             0x4a
  24#define ATIIXP_IDE_UDMA_CONTROL         0x54
  25#define ATIIXP_IDE_UDMA_MODE            0x56
  26
  27typedef struct {
  28        u8 command_width;
  29        u8 recover_width;
  30} atiixp_ide_timing;
  31
  32static atiixp_ide_timing pio_timing[] = {
  33        { 0x05, 0x0d },
  34        { 0x04, 0x07 },
  35        { 0x03, 0x04 },
  36        { 0x02, 0x02 },
  37        { 0x02, 0x00 },
  38};
  39
  40static atiixp_ide_timing mdma_timing[] = {
  41        { 0x07, 0x07 },
  42        { 0x02, 0x01 },
  43        { 0x02, 0x00 },
  44};
  45
  46static int save_mdma_mode[4];
  47
  48static DEFINE_SPINLOCK(atiixp_lock);
  49
  50static void atiixp_dma_host_on(ide_drive_t *drive)
  51{
  52        struct pci_dev *dev = drive->hwif->pci_dev;
  53        unsigned long flags;
  54        u16 tmp16;
  55
  56        spin_lock_irqsave(&atiixp_lock, flags);
  57
  58        pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
  59        if (save_mdma_mode[drive->dn])
  60                tmp16 &= ~(1 << drive->dn);
  61        else
  62                tmp16 |= (1 << drive->dn);
  63        pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
  64
  65        spin_unlock_irqrestore(&atiixp_lock, flags);
  66
  67        ide_dma_host_on(drive);
  68}
  69
  70static void atiixp_dma_host_off(ide_drive_t *drive)
  71{
  72        struct pci_dev *dev = drive->hwif->pci_dev;
  73        unsigned long flags;
  74        u16 tmp16;
  75
  76        spin_lock_irqsave(&atiixp_lock, flags);
  77
  78        pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
  79        tmp16 &= ~(1 << drive->dn);
  80        pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
  81
  82        spin_unlock_irqrestore(&atiixp_lock, flags);
  83
  84        ide_dma_host_off(drive);
  85}
  86
  87/**
  88 *      atiixp_set_pio_mode     -       set host controller for PIO mode
  89 *      @drive: drive
  90 *      @pio: PIO mode number
  91 *
  92 *      Set the interface PIO mode.
  93 */
  94
  95static void atiixp_set_pio_mode(ide_drive_t *drive, const u8 pio)
  96{
  97        struct pci_dev *dev = drive->hwif->pci_dev;
  98        unsigned long flags;
  99        int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
 100        u32 pio_timing_data;
 101        u16 pio_mode_data;
 102
 103        spin_lock_irqsave(&atiixp_lock, flags);
 104
 105        pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
 106        pio_mode_data &= ~(0x07 << (drive->dn * 4));
 107        pio_mode_data |= (pio << (drive->dn * 4));
 108        pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
 109
 110        pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
 111        pio_timing_data &= ~(0xff << timing_shift);
 112        pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) |
 113                 (pio_timing[pio].command_width << (timing_shift + 4));
 114        pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
 115
 116        spin_unlock_irqrestore(&atiixp_lock, flags);
 117}
 118
 119/**
 120 *      atiixp_set_dma_mode     -       set host controller for DMA mode
 121 *      @drive: drive
 122 *      @speed: DMA mode
 123 *
 124 *      Set a ATIIXP host controller to the desired DMA mode.  This involves
 125 *      programming the right timing data into the PCI configuration space.
 126 */
 127
 128static void atiixp_set_dma_mode(ide_drive_t *drive, const u8 speed)
 129{
 130        struct pci_dev *dev = drive->hwif->pci_dev;
 131        unsigned long flags;
 132        int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
 133        u32 tmp32;
 134        u16 tmp16;
 135
 136        if (speed < XFER_MW_DMA_0)
 137                return;
 138
 139        spin_lock_irqsave(&atiixp_lock, flags);
 140
 141        save_mdma_mode[drive->dn] = 0;
 142        if (speed >= XFER_UDMA_0) {
 143                pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16);
 144                tmp16 &= ~(0x07 << (drive->dn * 4));
 145                tmp16 |= ((speed & 0x07) << (drive->dn * 4));
 146                pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16);
 147        } else {
 148                if ((speed >= XFER_MW_DMA_0) && (speed <= XFER_MW_DMA_2)) {
 149                        save_mdma_mode[drive->dn] = speed;
 150                        pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32);
 151                        tmp32 &= ~(0xff << timing_shift);
 152                        tmp32 |= (mdma_timing[speed & 0x03].recover_width << timing_shift) |
 153                                (mdma_timing[speed & 0x03].command_width << (timing_shift + 4));
 154                        pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32);
 155                }
 156        }
 157
 158        spin_unlock_irqrestore(&atiixp_lock, flags);
 159}
 160
 161/**
 162 *      init_hwif_atiixp                -       fill in the hwif for the ATIIXP
 163 *      @hwif: IDE interface
 164 *
 165 *      Set up the ide_hwif_t for the ATIIXP interface according to the
 166 *      capabilities of the hardware.
 167 */
 168
 169static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
 170{
 171        u8 udma_mode = 0;
 172        u8 ch = hwif->channel;
 173        struct pci_dev *pdev = hwif->pci_dev;
 174
 175        hwif->set_pio_mode = &atiixp_set_pio_mode;
 176        hwif->set_dma_mode = &atiixp_set_dma_mode;
 177
 178        if (!hwif->dma_base)
 179                return;
 180
 181        pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ch, &udma_mode);
 182
 183        if ((udma_mode & 0x07) >= 0x04 || (udma_mode & 0x70) >= 0x40)
 184                hwif->cbl = ATA_CBL_PATA80;
 185        else
 186                hwif->cbl = ATA_CBL_PATA40;
 187
 188        hwif->dma_host_on = &atiixp_dma_host_on;
 189        hwif->dma_host_off = &atiixp_dma_host_off;
 190}
 191
 192static const struct ide_port_info atiixp_pci_info[] __devinitdata = {
 193        {       /* 0 */
 194                .name           = "ATIIXP",
 195                .init_hwif      = init_hwif_atiixp,
 196                .enablebits     = {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
 197                .host_flags     = IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_BOOTABLE,
 198                .pio_mask       = ATA_PIO4,
 199                .mwdma_mask     = ATA_MWDMA2,
 200                .udma_mask      = ATA_UDMA5,
 201        },{     /* 1 */
 202                .name           = "SB600_PATA",
 203                .init_hwif      = init_hwif_atiixp,
 204                .enablebits     = {{0x48,0x01,0x00}, {0x00,0x00,0x00}},
 205                .host_flags     = IDE_HFLAG_SINGLE | IDE_HFLAG_LEGACY_IRQS |
 206                                  IDE_HFLAG_BOOTABLE,
 207                .pio_mask       = ATA_PIO4,
 208                .mwdma_mask     = ATA_MWDMA2,
 209                .udma_mask      = ATA_UDMA5,
 210        },
 211};
 212
 213/**
 214 *      atiixp_init_one -       called when a ATIIXP is found
 215 *      @dev: the atiixp device
 216 *      @id: the matching pci id
 217 *
 218 *      Called when the PCI registration layer (or the IDE initialization)
 219 *      finds a device matching our IDE device tables.
 220 */
 221
 222static int __devinit atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 223{
 224        return ide_setup_pci_device(dev, &atiixp_pci_info[id->driver_data]);
 225}
 226
 227static const struct pci_device_id atiixp_pci_tbl[] = {
 228        { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), 0 },
 229        { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), 0 },
 230        { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), 0 },
 231        { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), 1 },
 232        { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), 0 },
 233        { 0, },
 234};
 235MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);
 236
 237static struct pci_driver driver = {
 238        .name           = "ATIIXP_IDE",
 239        .id_table       = atiixp_pci_tbl,
 240        .probe          = atiixp_init_one,
 241};
 242
 243static int __init atiixp_ide_init(void)
 244{
 245        return ide_pci_register_driver(&driver);
 246}
 247
 248module_init(atiixp_ide_init);
 249
 250MODULE_AUTHOR("HUI YU");
 251MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
 252MODULE_LICENSE("GPL");
 253
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