drivers/ide/pci/atiixp.c

   1 /*
   2  *  linux/drivers/ide/pci/atiixp.c      Version 0.02    Jun 16 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
  27 typedef struct {
  28         u8 command_width;
  29         u8 recover_width;
  30 } atiixp_ide_timing;
  31
  32 static atiixp_ide_timing pio_timing[] = {
  33         { 0x05, 0x0d },
  34         { 0x04, 0x07 },
  35         { 0x03, 0x04 },
  36         { 0x02, 0x02 },
  37         { 0x02, 0x00 },
  38 };
  39
  40 static atiixp_ide_timing mdma_timing[] = {
  41         { 0x07, 0x07 },
  42         { 0x02, 0x01 },
  43         { 0x02, 0x00 },
  44 };
  45
  46 static int save_mdma_mode[4];
  47
  48 static DEFINE_SPINLOCK(atiixp_lock);
  49
  50 /**
  51  *      atiixp_dma_2_pio                -       return the PIO mode matching DMA
  52  *      @xfer_rate: transfer speed
  53  *
  54  *      Returns the nearest equivalent PIO timing for the PIO or DMA
  55  *      mode requested by the controller.
  56  */
  57
  58 static u8 atiixp_dma_2_pio(u8 xfer_rate) {
  59         switch(xfer_rate) {
  60                 case XFER_UDMA_6:
  61                 case XFER_UDMA_5:
  62                 case XFER_UDMA_4:
  63                 case XFER_UDMA_3:
  64                 case XFER_UDMA_2:
  65                 case XFER_UDMA_1:
  66                 case XFER_UDMA_0:
  67                 case XFER_MW_DMA_2:
  68                 case XFER_PIO_4:
  69                         return 4;
  70                 case XFER_MW_DMA_1:
  71                 case XFER_PIO_3:
  72                         return 3;
  73                 case XFER_SW_DMA_2:
  74                 case XFER_PIO_2:
  75                         return 2;
  76                 case XFER_MW_DMA_0:
  77                 case XFER_SW_DMA_1:
  78                 case XFER_SW_DMA_0:
  79                 case XFER_PIO_1:
  80                 case XFER_PIO_0:
  81                 case XFER_PIO_SLOW:
  82                 default:
  83                         return 0;
  84         }
  85 }
  86
  87 static void atiixp_dma_host_on(ide_drive_t *drive)
  88 {
  89         struct pci_dev *dev = drive->hwif->pci_dev;
  90         unsigned long flags;
  91         u16 tmp16;
  92
  93         spin_lock_irqsave(&atiixp_lock, flags);
  94
  95         pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
  96         if (save_mdma_mode[drive->dn])
  97                 tmp16 &= ~(1 << drive->dn);
  98         else
  99                 tmp16 |= (1 << drive->dn);
 100         pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 101
 102         spin_unlock_irqrestore(&atiixp_lock, flags);
 103
 104         ide_dma_host_on(drive);
 105 }
 106
 107 static void atiixp_dma_host_off(ide_drive_t *drive)
 108 {
 109         struct pci_dev *dev = drive->hwif->pci_dev;
 110         unsigned long flags;
 111         u16 tmp16;
 112
 113         spin_lock_irqsave(&atiixp_lock, flags);
 114
 115         pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 116         tmp16 &= ~(1 << drive->dn);
 117         pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 118
 119         spin_unlock_irqrestore(&atiixp_lock, flags);
 120
 121         ide_dma_host_off(drive);
 122 }
 123
 124 /**
 125  *      atiixp_tune_pio -       tune a drive attached to a ATIIXP
 126  *      @drive: drive to tune
 127  *      @pio: desired PIO mode
 128  *
 129  *      Set the interface PIO mode.
 130  */
 131
 132 static void atiixp_tune_pio(ide_drive_t *drive, u8 pio)
 133 {
 134         struct pci_dev *dev = drive->hwif->pci_dev;
 135         unsigned long flags;
 136         int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
 137         u32 pio_timing_data;
 138         u16 pio_mode_data;
 139
 140         spin_lock_irqsave(&atiixp_lock, flags);
 141
 142         pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
 143         pio_mode_data &= ~(0x07 << (drive->dn * 4));
 144         pio_mode_data |= (pio << (drive->dn * 4));
 145         pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
 146
 147         pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
 148         pio_timing_data &= ~(0xff << timing_shift);
 149         pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) |
 150                  (pio_timing[pio].command_width << (timing_shift + 4));
 151         pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
 152
 153         spin_unlock_irqrestore(&atiixp_lock, flags);
 154 }
 155
 156 static void atiixp_tuneproc(ide_drive_t *drive, u8 pio)
 157 {
 158         pio = ide_get_best_pio_mode(drive, pio, 4);
 159         atiixp_tune_pio(drive, pio);
 160         (void)ide_config_drive_speed(drive, XFER_PIO_0 + pio);
 161 }
 162
 163 /**
 164  *      atiixp_tune_chipset     -       tune a ATIIXP interface
 165  *      @drive: IDE drive to tune
 166  *      @xferspeed: speed to configure
 167  *
 168  *      Set a ATIIXP interface channel to the desired speeds. This involves
 169  *      requires the right timing data into the ATIIXP configuration space
 170  *      then setting the drive parameters appropriately
 171  */
 172
 173 static int atiixp_speedproc(ide_drive_t *drive, u8 xferspeed)
 174 {
 175         struct pci_dev *dev = drive->hwif->pci_dev;
 176         unsigned long flags;
 177         int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
 178         u32 tmp32;
 179         u16 tmp16;
 180         u8 speed, pio;
 181
 182         speed = ide_rate_filter(drive, xferspeed);
 183
 184         if (speed >= XFER_PIO_0 && speed <= XFER_PIO_4) {
 185                 atiixp_tune_pio(drive, speed - XFER_PIO_0);
 186                 return ide_config_drive_speed(drive, speed);
 187         }
 188
 189         spin_lock_irqsave(&atiixp_lock, flags);
 190
 191         save_mdma_mode[drive->dn] = 0;
 192         if (speed >= XFER_UDMA_0) {
 193                 pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16);
 194                 tmp16 &= ~(0x07 << (drive->dn * 4));
 195                 tmp16 |= ((speed & 0x07) << (drive->dn * 4));
 196                 pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16);
 197         } else {
 198                 if ((speed >= XFER_MW_DMA_0) && (speed <= XFER_MW_DMA_2)) {
 199                         save_mdma_mode[drive->dn] = speed;
 200                         pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32);
 201                         tmp32 &= ~(0xff << timing_shift);
 202                         tmp32 |= (mdma_timing[speed & 0x03].recover_width << timing_shift) |
 203                                 (mdma_timing[speed & 0x03].command_width << (timing_shift + 4));
 204                         pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32);
 205                 }
 206         }
 207
 208         spin_unlock_irqrestore(&atiixp_lock, flags);
 209
 210         if (speed >= XFER_SW_DMA_0)
 211                 pio = atiixp_dma_2_pio(speed);
 212         else
 213                 pio = speed - XFER_PIO_0;
 214
 215         atiixp_tune_pio(drive, pio);
 216
 217         return ide_config_drive_speed(drive, speed);
 218 }
 219
 220 /**
 221  *      atiixp_dma_check        -       set up an IDE device
 222  *      @drive: IDE drive to configure
 223  *
 224  *      Set up the ATIIXP interface for the best available speed on this
 225  *      interface, preferring DMA to PIO.
 226  */
 227
 228 static int atiixp_dma_check(ide_drive_t *drive)
 229 {
 230         drive->init_speed = 0;
 231
 232         if (ide_tune_dma(drive))
 233                 return 0;
 234
 235         if (ide_use_fast_pio(drive))
 236                 atiixp_tuneproc(drive, 255);
 237
 238         return -1;
 239 }
 240
 241 /**
 242  *      init_hwif_atiixp                -       fill in the hwif for the ATIIXP
 243  *      @hwif: IDE interface
 244  *
 245  *      Set up the ide_hwif_t for the ATIIXP interface according to the
 246  *      capabilities of the hardware.
 247  */
 248
 249 static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
 250 {
 251         u8 udma_mode = 0;
 252         u8 ch = hwif->channel;
 253         struct pci_dev *pdev = hwif->pci_dev;
 254
 255         if (!hwif->irq)
 256                 hwif->irq = ch ? 15 : 14;
 257
 258         hwif->autodma = 0;
 259         hwif->tuneproc = &atiixp_tuneproc;
 260         hwif->speedproc = &atiixp_speedproc;
 261         hwif->drives[0].autotune = 1;
 262         hwif->drives[1].autotune = 1;
 263
 264         if (!hwif->dma_base)
 265                 return;
 266
 267         hwif->atapi_dma = 1;
 268         hwif->ultra_mask = 0x3f;
 269         hwif->mwdma_mask = 0x06;
 270         hwif->swdma_mask = 0x04;
 271
 272         pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ch, &udma_mode);
 273
 274         if ((udma_mode & 0x07) >= 0x04 || (udma_mode & 0x70) >= 0x40)
 275                 hwif->cbl = ATA_CBL_PATA80;
 276         else
 277                 hwif->cbl = ATA_CBL_PATA40;
 278
 279         hwif->dma_host_on = &atiixp_dma_host_on;
 280         hwif->dma_host_off = &atiixp_dma_host_off;
 281         hwif->ide_dma_check = &atiixp_dma_check;
 282         if (!noautodma)
 283                 hwif->autodma = 1;
 284
 285         hwif->drives[1].autodma = hwif->autodma;
 286         hwif->drives[0].autodma = hwif->autodma;
 287 }
 288
 289
 290 static ide_pci_device_t atiixp_pci_info[] __devinitdata = {
 291         {       /* 0 */
 292                 .name           = "ATIIXP",
 293                 .init_hwif      = init_hwif_atiixp,
 294                 .autodma        = AUTODMA,
 295                 .enablebits     = {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
 296                 .bootable       = ON_BOARD,
 297                 .pio_mask       = ATA_PIO4,
 298         },{     /* 1 */
 299                 .name           = "SB600_PATA",
 300                 .init_hwif      = init_hwif_atiixp,
 301                 .autodma        = AUTODMA,
 302                 .enablebits     = {{0x48,0x01,0x00}, {0x00,0x00,0x00}},
 303                 .bootable       = ON_BOARD,
 304                 .host_flags     = IDE_HFLAG_SINGLE,
 305                 .pio_mask       = ATA_PIO4,
 306         },
 307 };
 308
 309 /**
 310  *      atiixp_init_one -       called when a ATIIXP is found
 311  *      @dev: the atiixp device
 312  *      @id: the matching pci id
 313  *
 314  *      Called when the PCI registration layer (or the IDE initialization)
 315  *      finds a device matching our IDE device tables.
 316  */
 317
 318 static int __devinit atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 319 {
 320         return ide_setup_pci_device(dev, &atiixp_pci_info[id->driver_data]);
 321 }
 322
 323 static struct pci_device_id atiixp_pci_tbl[] = {
 324         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP200_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 325         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP300_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 326         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 327         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
 328         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP700_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 329         { 0, },
 330 };
 331 MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);
 332
 333 static struct pci_driver driver = {
 334         .name           = "ATIIXP_IDE",
 335         .id_table       = atiixp_pci_tbl,
 336         .probe          = atiixp_init_one,
 337 };
 338
 339 static int __init atiixp_ide_init(void)
 340 {
 341         return ide_pci_register_driver(&driver);
 342 }
 343
 344 module_init(atiixp_ide_init);
 345
 346 MODULE_AUTHOR("HUI YU");
 347 MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
 348 MODULE_LICENSE("GPL");