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/config.h>
  10 #include <linux/types.h>
  11 #include <linux/module.h>
  12 #include <linux/kernel.h>
  13 #include <linux/ioport.h>
  14 #include <linux/pci.h>
  15 #include <linux/hdreg.h>
  16 #include <linux/ide.h>
  17 #include <linux/delay.h>
  18 #include <linux/init.h>
  19
  20 #include <asm/io.h>
  21
  22 #define ATIIXP_IDE_PIO_TIMING           0x40
  23 #define ATIIXP_IDE_MDMA_TIMING          0x44
  24 #define ATIIXP_IDE_PIO_CONTROL          0x48
  25 #define ATIIXP_IDE_PIO_MODE             0x4a
  26 #define ATIIXP_IDE_UDMA_CONTROL         0x54
  27 #define ATIIXP_IDE_UDMA_MODE            0x56
  28
  29 typedef struct {
  30         u8 command_width;
  31         u8 recover_width;
  32 } atiixp_ide_timing;
  33
  34 static atiixp_ide_timing pio_timing[] = {
  35         { 0x05, 0x0d },
  36         { 0x04, 0x07 },
  37         { 0x03, 0x04 },
  38         { 0x02, 0x02 },
  39         { 0x02, 0x00 },
  40 };
  41
  42 static atiixp_ide_timing mdma_timing[] = {
  43         { 0x07, 0x07 },
  44         { 0x02, 0x01 },
  45         { 0x02, 0x00 },
  46 };
  47
  48 static int save_mdma_mode[4];
  49
  50 /**
  51  *      atiixp_ratemask         -       compute rate mask for ATIIXP IDE
  52  *      @drive: IDE drive to compute for
  53  *
  54  *      Returns the available modes for the ATIIXP IDE controller.
  55  */
  56
  57 static u8 atiixp_ratemask(ide_drive_t *drive)
  58 {
  59         u8 mode = 3;
  60
  61         if (!eighty_ninty_three(drive))
  62                 mode = min(mode, (u8)1);
  63         return mode;
  64 }
  65
  66 /**
  67  *      atiixp_dma_2_pio                -       return the PIO mode matching DMA
  68  *      @xfer_rate: transfer speed
  69  *
  70  *      Returns the nearest equivalent PIO timing for the PIO or DMA
  71  *      mode requested by the controller.
  72  */
  73
  74 static u8 atiixp_dma_2_pio(u8 xfer_rate) {
  75         switch(xfer_rate) {
  76                 case XFER_UDMA_6:
  77                 case XFER_UDMA_5:
  78                 case XFER_UDMA_4:
  79                 case XFER_UDMA_3:
  80                 case XFER_UDMA_2:
  81                 case XFER_UDMA_1:
  82                 case XFER_UDMA_0:
  83                 case XFER_MW_DMA_2:
  84                 case XFER_PIO_4:
  85                         return 4;
  86                 case XFER_MW_DMA_1:
  87                 case XFER_PIO_3:
  88                         return 3;
  89                 case XFER_SW_DMA_2:
  90                 case XFER_PIO_2:
  91                         return 2;
  92                 case XFER_MW_DMA_0:
  93                 case XFER_SW_DMA_1:
  94                 case XFER_SW_DMA_0:
  95                 case XFER_PIO_1:
  96                 case XFER_PIO_0:
  97                 case XFER_PIO_SLOW:
  98                 default:
  99                         return 0;
 100         }
 101 }
 102
 103 static int atiixp_ide_dma_host_on(ide_drive_t *drive)
 104 {
 105         struct pci_dev *dev = drive->hwif->pci_dev;
 106         unsigned long flags;
 107         u16 tmp16;
 108
 109         spin_lock_irqsave(&ide_lock, flags);
 110
 111         pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 112         if (save_mdma_mode[drive->dn])
 113                 tmp16 &= ~(1 << drive->dn);
 114         else
 115                 tmp16 |= (1 << drive->dn);
 116         pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 117
 118         spin_unlock_irqrestore(&ide_lock, flags);
 119
 120         return __ide_dma_host_on(drive);
 121 }
 122
 123 static int atiixp_ide_dma_host_off(ide_drive_t *drive)
 124 {
 125         struct pci_dev *dev = drive->hwif->pci_dev;
 126         unsigned long flags;
 127         u16 tmp16;
 128
 129         spin_lock_irqsave(&ide_lock, flags);
 130
 131         pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 132         tmp16 &= ~(1 << drive->dn);
 133         pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 134
 135         spin_unlock_irqrestore(&ide_lock, flags);
 136
 137         return __ide_dma_host_off(drive);
 138 }
 139
 140 /**
 141  *      atiixp_tune_drive               -       tune a drive attached to a ATIIXP
 142  *      @drive: drive to tune
 143  *      @pio: desired PIO mode
 144  *
 145  *      Set the interface PIO mode.
 146  */
 147
 148 static void atiixp_tuneproc(ide_drive_t *drive, u8 pio)
 149 {
 150         struct pci_dev *dev = drive->hwif->pci_dev;
 151         unsigned long flags;
 152         int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
 153         u32 pio_timing_data;
 154         u16 pio_mode_data;
 155
 156         spin_lock_irqsave(&ide_lock, flags);
 157
 158         pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
 159         pio_mode_data &= ~(0x07 << (drive->dn * 4));
 160         pio_mode_data |= (pio << (drive->dn * 4));
 161         pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
 162
 163         pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
 164         pio_timing_data &= ~(0xff << timing_shift);
 165         pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) |
 166                  (pio_timing[pio].command_width << (timing_shift + 4));
 167         pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
 168
 169         spin_unlock_irqrestore(&ide_lock, flags);
 170 }
 171
 172 /**
 173  *      atiixp_tune_chipset     -       tune a ATIIXP interface
 174  *      @drive: IDE drive to tune
 175  *      @xferspeed: speed to configure
 176  *
 177  *      Set a ATIIXP interface channel to the desired speeds. This involves
 178  *      requires the right timing data into the ATIIXP configuration space
 179  *      then setting the drive parameters appropriately
 180  */
 181
 182 static int atiixp_speedproc(ide_drive_t *drive, u8 xferspeed)
 183 {
 184         struct pci_dev *dev = drive->hwif->pci_dev;
 185         unsigned long flags;
 186         int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
 187         u32 tmp32;
 188         u16 tmp16;
 189         u8 speed, pio;
 190
 191         speed = ide_rate_filter(atiixp_ratemask(drive), xferspeed);
 192
 193         spin_lock_irqsave(&ide_lock, flags);
 194
 195         save_mdma_mode[drive->dn] = 0;
 196         if (speed >= XFER_UDMA_0) {
 197                 pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16);
 198                 tmp16 &= ~(0x07 << (drive->dn * 4));
 199                 tmp16 |= ((speed & 0x07) << (drive->dn * 4));
 200                 pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16);
 201         } else {
 202                 if ((speed >= XFER_MW_DMA_0) && (speed <= XFER_MW_DMA_2)) {
 203                         save_mdma_mode[drive->dn] = speed;
 204                         pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32);
 205                         tmp32 &= ~(0xff << timing_shift);
 206                         tmp32 |= (mdma_timing[speed & 0x03].recover_width << timing_shift) |
 207                                 (mdma_timing[speed & 0x03].command_width << (timing_shift + 4));
 208                         pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32);
 209                 }
 210         }
 211
 212         spin_unlock_irqrestore(&ide_lock, flags);
 213
 214         if (speed >= XFER_SW_DMA_0)
 215                 pio = atiixp_dma_2_pio(speed);
 216         else
 217                 pio = speed - XFER_PIO_0;
 218
 219         atiixp_tuneproc(drive, pio);
 220
 221         return ide_config_drive_speed(drive, speed);
 222 }
 223
 224 /**
 225  *      atiixp_config_drive_for_dma     -       configure drive for DMA
 226  *      @drive: IDE drive to configure
 227  *
 228  *      Set up a ATIIXP interface channel for the best available speed.
 229  *      We prefer UDMA if it is available and then MWDMA. If DMA is
 230  *      not available we switch to PIO and return 0.
 231  */
 232
 233 static int atiixp_config_drive_for_dma(ide_drive_t *drive)
 234 {
 235         u8 speed = ide_dma_speed(drive, atiixp_ratemask(drive));
 236
 237         /* If no DMA speed was available then disable DMA and use PIO. */
 238         if (!speed) {
 239                 u8 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
 240                 speed = atiixp_dma_2_pio(XFER_PIO_0 + tspeed) + XFER_PIO_0;
 241         }
 242
 243         (void) atiixp_speedproc(drive, speed);
 244         return ide_dma_enable(drive);
 245 }
 246
 247 /**
 248  *      atiixp_dma_check        -       set up an IDE device
 249  *      @drive: IDE drive to configure
 250  *
 251  *      Set up the ATIIXP interface for the best available speed on this
 252  *      interface, preferring DMA to PIO.
 253  */
 254
 255 static int atiixp_dma_check(ide_drive_t *drive)
 256 {
 257         ide_hwif_t *hwif        = HWIF(drive);
 258         struct hd_driveid *id   = drive->id;
 259         u8 tspeed, speed;
 260
 261         drive->init_speed = 0;
 262
 263         if ((id->capability & 1) && drive->autodma) {
 264
 265                 if (ide_use_dma(drive)) {
 266                         if (atiixp_config_drive_for_dma(drive))
 267                                 return hwif->ide_dma_on(drive);
 268                 }
 269
 270                 goto fast_ata_pio;
 271
 272         } else if ((id->capability & 8) || (id->field_valid & 2)) {
 273 fast_ata_pio:
 274                 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
 275                 speed = atiixp_dma_2_pio(XFER_PIO_0 + tspeed) + XFER_PIO_0;
 276                 hwif->speedproc(drive, speed);
 277                 return hwif->ide_dma_off_quietly(drive);
 278         }
 279         /* IORDY not supported */
 280         return 0;
 281 }
 282
 283 /**
 284  *      init_hwif_atiixp                -       fill in the hwif for the ATIIXP
 285  *      @hwif: IDE interface
 286  *
 287  *      Set up the ide_hwif_t for the ATIIXP interface according to the
 288  *      capabilities of the hardware.
 289  */
 290
 291 static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
 292 {
 293         if (!hwif->irq)
 294                 hwif->irq = hwif->channel ? 15 : 14;
 295
 296         hwif->autodma = 0;
 297         hwif->tuneproc = &atiixp_tuneproc;
 298         hwif->speedproc = &atiixp_speedproc;
 299         hwif->drives[0].autotune = 1;
 300         hwif->drives[1].autotune = 1;
 301
 302         if (!hwif->dma_base)
 303                 return;
 304
 305         hwif->atapi_dma = 1;
 306         hwif->ultra_mask = 0x3f;
 307         hwif->mwdma_mask = 0x06;
 308         hwif->swdma_mask = 0x04;
 309
 310         /* FIXME: proper cable detection needed */
 311         hwif->udma_four = 1;
 312         hwif->ide_dma_host_on = &atiixp_ide_dma_host_on;
 313         hwif->ide_dma_host_off = &atiixp_ide_dma_host_off;
 314         hwif->ide_dma_check = &atiixp_dma_check;
 315         if (!noautodma)
 316                 hwif->autodma = 1;
 317
 318         hwif->drives[1].autodma = hwif->autodma;
 319         hwif->drives[0].autodma = hwif->autodma;
 320 }
 321
 322 static ide_pci_device_t atiixp_pci_info[] __devinitdata = {
 323         {       /* 0 */
 324                 .name           = "ATIIXP",
 325                 .init_hwif      = init_hwif_atiixp,
 326                 .channels       = 2,
 327                 .autodma        = AUTODMA,
 328                 .enablebits     = {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
 329                 .bootable       = ON_BOARD,
 330         }
 331 };
 332
 333 /**
 334  *      atiixp_init_one -       called when a ATIIXP is found
 335  *      @dev: the atiixp device
 336  *      @id: the matching pci id
 337  *
 338  *      Called when the PCI registration layer (or the IDE initialization)
 339  *      finds a device matching our IDE device tables.
 340  */
 341
 342 static int __devinit atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 343 {
 344         return ide_setup_pci_device(dev, &atiixp_pci_info[id->driver_data]);
 345 }
 346
 347 static struct pci_device_id atiixp_pci_tbl[] = {
 348         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP200_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 349         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP300_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 350         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 351         { 0, },
 352 };
 353 MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);
 354
 355 static struct pci_driver driver = {
 356         .name           = "ATIIXP_IDE",
 357         .id_table       = atiixp_pci_tbl,
 358         .probe          = atiixp_init_one,
 359 };
 360
 361 static int atiixp_ide_init(void)
 362 {
 363         return ide_pci_register_driver(&driver);
 364 }
 365
 366 module_init(atiixp_ide_init);
 367
 368 MODULE_AUTHOR("HUI YU");
 369 MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
 370 MODULE_LICENSE("GPL");