drivers/ide/pci/atiixp.c

   1 /*
   2  *  linux/drivers/ide/pci/atiixp.c      Version 0.01-bart2      Feb. 26, 2004
   3  *
   4  *  Copyright (C) 2003 ATI Inc. <hyu@ati.com>
   5  *  Copyright (C) 2004 Bartlomiej Zolnierkiewicz
   6  *
   7  */
   8
   9 #include <linux/types.h>
  10 #include <linux/module.h>
  11 #include <linux/kernel.h>
  12 #include <linux/ioport.h>
  13 #include <linux/pci.h>
  14 #include <linux/hdreg.h>
  15 #include <linux/ide.h>
  16 #include <linux/delay.h>
  17 #include <linux/init.h>
  18
  19 #include <asm/io.h>
  20
  21 #define ATIIXP_IDE_PIO_TIMING           0x40
  22 #define ATIIXP_IDE_MDMA_TIMING          0x44
  23 #define ATIIXP_IDE_PIO_CONTROL          0x48
  24 #define ATIIXP_IDE_PIO_MODE             0x4a
  25 #define ATIIXP_IDE_UDMA_CONTROL         0x54
  26 #define ATIIXP_IDE_UDMA_MODE            0x56
  27
  28 typedef struct {
  29         u8 command_width;
  30         u8 recover_width;
  31 } atiixp_ide_timing;
  32
  33 static atiixp_ide_timing pio_timing[] = {
  34         { 0x05, 0x0d },
  35         { 0x04, 0x07 },
  36         { 0x03, 0x04 },
  37         { 0x02, 0x02 },
  38         { 0x02, 0x00 },
  39 };
  40
  41 static atiixp_ide_timing mdma_timing[] = {
  42         { 0x07, 0x07 },
  43         { 0x02, 0x01 },
  44         { 0x02, 0x00 },
  45 };
  46
  47 static int save_mdma_mode[4];
  48
  49 static DEFINE_SPINLOCK(atiixp_lock);
  50
  51 /**
  52  *      atiixp_dma_2_pio                -       return the PIO mode matching DMA
  53  *      @xfer_rate: transfer speed
  54  *
  55  *      Returns the nearest equivalent PIO timing for the PIO or DMA
  56  *      mode requested by the controller.
  57  */
  58
  59 static u8 atiixp_dma_2_pio(u8 xfer_rate) {
  60         switch(xfer_rate) {
  61                 case XFER_UDMA_6:
  62                 case XFER_UDMA_5:
  63                 case XFER_UDMA_4:
  64                 case XFER_UDMA_3:
  65                 case XFER_UDMA_2:
  66                 case XFER_UDMA_1:
  67                 case XFER_UDMA_0:
  68                 case XFER_MW_DMA_2:
  69                 case XFER_PIO_4:
  70                         return 4;
  71                 case XFER_MW_DMA_1:
  72                 case XFER_PIO_3:
  73                         return 3;
  74                 case XFER_SW_DMA_2:
  75                 case XFER_PIO_2:
  76                         return 2;
  77                 case XFER_MW_DMA_0:
  78                 case XFER_SW_DMA_1:
  79                 case XFER_SW_DMA_0:
  80                 case XFER_PIO_1:
  81                 case XFER_PIO_0:
  82                 case XFER_PIO_SLOW:
  83                 default:
  84                         return 0;
  85         }
  86 }
  87
  88 static void atiixp_dma_host_on(ide_drive_t *drive)
  89 {
  90         struct pci_dev *dev = drive->hwif->pci_dev;
  91         unsigned long flags;
  92         u16 tmp16;
  93
  94         spin_lock_irqsave(&atiixp_lock, flags);
  95
  96         pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
  97         if (save_mdma_mode[drive->dn])
  98                 tmp16 &= ~(1 << drive->dn);
  99         else
 100                 tmp16 |= (1 << drive->dn);
 101         pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 102
 103         spin_unlock_irqrestore(&atiixp_lock, flags);
 104
 105         ide_dma_host_on(drive);
 106 }
 107
 108 static void atiixp_dma_host_off(ide_drive_t *drive)
 109 {
 110         struct pci_dev *dev = drive->hwif->pci_dev;
 111         unsigned long flags;
 112         u16 tmp16;
 113
 114         spin_lock_irqsave(&atiixp_lock, flags);
 115
 116         pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 117         tmp16 &= ~(1 << drive->dn);
 118         pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 119
 120         spin_unlock_irqrestore(&atiixp_lock, flags);
 121
 122         ide_dma_host_off(drive);
 123 }
 124
 125 /**
 126  *      atiixp_tune_drive               -       tune a drive attached to a ATIIXP
 127  *      @drive: drive to tune
 128  *      @pio: desired PIO mode
 129  *
 130  *      Set the interface PIO mode.
 131  */
 132
 133 static void atiixp_tuneproc(ide_drive_t *drive, u8 pio)
 134 {
 135         struct pci_dev *dev = drive->hwif->pci_dev;
 136         unsigned long flags;
 137         int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
 138         u32 pio_timing_data;
 139         u16 pio_mode_data;
 140
 141         spin_lock_irqsave(&atiixp_lock, flags);
 142
 143         pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
 144         pio_mode_data &= ~(0x07 << (drive->dn * 4));
 145         pio_mode_data |= (pio << (drive->dn * 4));
 146         pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
 147
 148         pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
 149         pio_timing_data &= ~(0xff << timing_shift);
 150         pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) |
 151                  (pio_timing[pio].command_width << (timing_shift + 4));
 152         pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
 153
 154         spin_unlock_irqrestore(&atiixp_lock, flags);
 155 }
 156
 157 /**
 158  *      atiixp_tune_chipset     -       tune a ATIIXP interface
 159  *      @drive: IDE drive to tune
 160  *      @xferspeed: speed to configure
 161  *
 162  *      Set a ATIIXP interface channel to the desired speeds. This involves
 163  *      requires the right timing data into the ATIIXP configuration space
 164  *      then setting the drive parameters appropriately
 165  */
 166
 167 static int atiixp_speedproc(ide_drive_t *drive, u8 xferspeed)
 168 {
 169         struct pci_dev *dev = drive->hwif->pci_dev;
 170         unsigned long flags;
 171         int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
 172         u32 tmp32;
 173         u16 tmp16;
 174         u8 speed, pio;
 175
 176         speed = ide_rate_filter(drive, xferspeed);
 177
 178         spin_lock_irqsave(&atiixp_lock, flags);
 179
 180         save_mdma_mode[drive->dn] = 0;
 181         if (speed >= XFER_UDMA_0) {
 182                 pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16);
 183                 tmp16 &= ~(0x07 << (drive->dn * 4));
 184                 tmp16 |= ((speed & 0x07) << (drive->dn * 4));
 185                 pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16);
 186         } else {
 187                 if ((speed >= XFER_MW_DMA_0) && (speed <= XFER_MW_DMA_2)) {
 188                         save_mdma_mode[drive->dn] = speed;
 189                         pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32);
 190                         tmp32 &= ~(0xff << timing_shift);
 191                         tmp32 |= (mdma_timing[speed & 0x03].recover_width << timing_shift) |
 192                                 (mdma_timing[speed & 0x03].command_width << (timing_shift + 4));
 193                         pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32);
 194                 }
 195         }
 196
 197         spin_unlock_irqrestore(&atiixp_lock, flags);
 198
 199         if (speed >= XFER_SW_DMA_0)
 200                 pio = atiixp_dma_2_pio(speed);
 201         else
 202                 pio = speed - XFER_PIO_0;
 203
 204         atiixp_tuneproc(drive, pio);
 205
 206         return ide_config_drive_speed(drive, speed);
 207 }
 208
 209 /**
 210  *      atiixp_dma_check        -       set up an IDE device
 211  *      @drive: IDE drive to configure
 212  *
 213  *      Set up the ATIIXP interface for the best available speed on this
 214  *      interface, preferring DMA to PIO.
 215  */
 216
 217 static int atiixp_dma_check(ide_drive_t *drive)
 218 {
 219         u8 tspeed, speed;
 220
 221         drive->init_speed = 0;
 222
 223         if (ide_tune_dma(drive))
 224                 return 0;
 225
 226         if (ide_use_fast_pio(drive)) {
 227                 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
 228                 speed = atiixp_dma_2_pio(XFER_PIO_0 + tspeed) + XFER_PIO_0;
 229                 atiixp_speedproc(drive, speed);
 230         }
 231
 232         return -1;
 233 }
 234
 235 /**
 236  *      init_hwif_atiixp                -       fill in the hwif for the ATIIXP
 237  *      @hwif: IDE interface
 238  *
 239  *      Set up the ide_hwif_t for the ATIIXP interface according to the
 240  *      capabilities of the hardware.
 241  */
 242
 243 static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
 244 {
 245         u8 udma_mode = 0;
 246         u8 ch = hwif->channel;
 247         struct pci_dev *pdev = hwif->pci_dev;
 248
 249         if (!hwif->irq)
 250                 hwif->irq = ch ? 15 : 14;
 251
 252         hwif->autodma = 0;
 253         hwif->tuneproc = &atiixp_tuneproc;
 254         hwif->speedproc = &atiixp_speedproc;
 255         hwif->drives[0].autotune = 1;
 256         hwif->drives[1].autotune = 1;
 257
 258         if (!hwif->dma_base)
 259                 return;
 260
 261         hwif->atapi_dma = 1;
 262         hwif->ultra_mask = 0x3f;
 263         hwif->mwdma_mask = 0x06;
 264         hwif->swdma_mask = 0x04;
 265
 266         pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ch, &udma_mode);
 267         if ((udma_mode & 0x07) >= 0x04 || (udma_mode & 0x70) >= 0x40)
 268                 hwif->udma_four = 1;
 269         else
 270                 hwif->udma_four = 0;
 271
 272         hwif->dma_host_on = &atiixp_dma_host_on;
 273         hwif->dma_host_off = &atiixp_dma_host_off;
 274         hwif->ide_dma_check = &atiixp_dma_check;
 275         if (!noautodma)
 276                 hwif->autodma = 1;
 277
 278         hwif->drives[1].autodma = hwif->autodma;
 279         hwif->drives[0].autodma = hwif->autodma;
 280 }
 281
 282
 283 static ide_pci_device_t atiixp_pci_info[] __devinitdata = {
 284         {       /* 0 */
 285                 .name           = "ATIIXP",
 286                 .init_hwif      = init_hwif_atiixp,
 287                 .channels       = 2,
 288                 .autodma        = AUTODMA,
 289                 .enablebits     = {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
 290                 .bootable       = ON_BOARD,
 291         },{     /* 1 */
 292                 .name           = "SB600_PATA",
 293                 .init_hwif      = init_hwif_atiixp,
 294                 .channels       = 1,
 295                 .autodma        = AUTODMA,
 296                 .enablebits     = {{0x48,0x01,0x00}, {0x00,0x00,0x00}},
 297                 .bootable       = ON_BOARD,
 298         },
 299 };
 300
 301 /**
 302  *      atiixp_init_one -       called when a ATIIXP is found
 303  *      @dev: the atiixp device
 304  *      @id: the matching pci id
 305  *
 306  *      Called when the PCI registration layer (or the IDE initialization)
 307  *      finds a device matching our IDE device tables.
 308  */
 309
 310 static int __devinit atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 311 {
 312         return ide_setup_pci_device(dev, &atiixp_pci_info[id->driver_data]);
 313 }
 314
 315 static struct pci_device_id atiixp_pci_tbl[] = {
 316         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP200_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 317         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP300_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 318         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 319         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
 320         { 0, },
 321 };
 322 MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);
 323
 324 static struct pci_driver driver = {
 325         .name           = "ATIIXP_IDE",
 326         .id_table       = atiixp_pci_tbl,
 327         .probe          = atiixp_init_one,
 328 };
 329
 330 static int __init atiixp_ide_init(void)
 331 {
 332         return ide_pci_register_driver(&driver);
 333 }
 334
 335 module_init(atiixp_ide_init);
 336
 337 MODULE_AUTHOR("HUI YU");
 338 MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
 339 MODULE_LICENSE("GPL");