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_ratemask         -       compute rate mask for ATIIXP IDE
  53  *      @drive: IDE drive to compute for
  54  *
  55  *      Returns the available modes for the ATIIXP IDE controller.
  56  */
  57
  58 static u8 atiixp_ratemask(ide_drive_t *drive)
  59 {
  60         u8 mode = 3;
  61
  62         if (!eighty_ninty_three(drive))
  63                 mode = min(mode, (u8)1);
  64         return mode;
  65 }
  66
  67 /**
  68  *      atiixp_dma_2_pio                -       return the PIO mode matching DMA
  69  *      @xfer_rate: transfer speed
  70  *
  71  *      Returns the nearest equivalent PIO timing for the PIO or DMA
  72  *      mode requested by the controller.
  73  */
  74
  75 static u8 atiixp_dma_2_pio(u8 xfer_rate) {
  76         switch(xfer_rate) {
  77                 case XFER_UDMA_6:
  78                 case XFER_UDMA_5:
  79                 case XFER_UDMA_4:
  80                 case XFER_UDMA_3:
  81                 case XFER_UDMA_2:
  82                 case XFER_UDMA_1:
  83                 case XFER_UDMA_0:
  84                 case XFER_MW_DMA_2:
  85                 case XFER_PIO_4:
  86                         return 4;
  87                 case XFER_MW_DMA_1:
  88                 case XFER_PIO_3:
  89                         return 3;
  90                 case XFER_SW_DMA_2:
  91                 case XFER_PIO_2:
  92                         return 2;
  93                 case XFER_MW_DMA_0:
  94                 case XFER_SW_DMA_1:
  95                 case XFER_SW_DMA_0:
  96                 case XFER_PIO_1:
  97                 case XFER_PIO_0:
  98                 case XFER_PIO_SLOW:
  99                 default:
 100                         return 0;
 101         }
 102 }
 103
 104 static void atiixp_dma_host_on(ide_drive_t *drive)
 105 {
 106         struct pci_dev *dev = drive->hwif->pci_dev;
 107         unsigned long flags;
 108         u16 tmp16;
 109
 110         spin_lock_irqsave(&atiixp_lock, flags);
 111
 112         pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 113         if (save_mdma_mode[drive->dn])
 114                 tmp16 &= ~(1 << drive->dn);
 115         else
 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_on(drive);
 122 }
 123
 124 static void atiixp_dma_host_off(ide_drive_t *drive)
 125 {
 126         struct pci_dev *dev = drive->hwif->pci_dev;
 127         unsigned long flags;
 128         u16 tmp16;
 129
 130         spin_lock_irqsave(&atiixp_lock, flags);
 131
 132         pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 133         tmp16 &= ~(1 << drive->dn);
 134         pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 135
 136         spin_unlock_irqrestore(&atiixp_lock, flags);
 137
 138         ide_dma_host_off(drive);
 139 }
 140
 141 /**
 142  *      atiixp_tune_drive               -       tune a drive attached to a ATIIXP
 143  *      @drive: drive to tune
 144  *      @pio: desired PIO mode
 145  *
 146  *      Set the interface PIO mode.
 147  */
 148
 149 static void atiixp_tuneproc(ide_drive_t *drive, u8 pio)
 150 {
 151         struct pci_dev *dev = drive->hwif->pci_dev;
 152         unsigned long flags;
 153         int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
 154         u32 pio_timing_data;
 155         u16 pio_mode_data;
 156
 157         spin_lock_irqsave(&atiixp_lock, flags);
 158
 159         pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
 160         pio_mode_data &= ~(0x07 << (drive->dn * 4));
 161         pio_mode_data |= (pio << (drive->dn * 4));
 162         pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
 163
 164         pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
 165         pio_timing_data &= ~(0xff << timing_shift);
 166         pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) |
 167                  (pio_timing[pio].command_width << (timing_shift + 4));
 168         pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
 169
 170         spin_unlock_irqrestore(&atiixp_lock, flags);
 171 }
 172
 173 /**
 174  *      atiixp_tune_chipset     -       tune a ATIIXP interface
 175  *      @drive: IDE drive to tune
 176  *      @xferspeed: speed to configure
 177  *
 178  *      Set a ATIIXP interface channel to the desired speeds. This involves
 179  *      requires the right timing data into the ATIIXP configuration space
 180  *      then setting the drive parameters appropriately
 181  */
 182
 183 static int atiixp_speedproc(ide_drive_t *drive, u8 xferspeed)
 184 {
 185         struct pci_dev *dev = drive->hwif->pci_dev;
 186         unsigned long flags;
 187         int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
 188         u32 tmp32;
 189         u16 tmp16;
 190         u8 speed, pio;
 191
 192         speed = ide_rate_filter(atiixp_ratemask(drive), xferspeed);
 193
 194         spin_lock_irqsave(&atiixp_lock, flags);
 195
 196         save_mdma_mode[drive->dn] = 0;
 197         if (speed >= XFER_UDMA_0) {
 198                 pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16);
 199                 tmp16 &= ~(0x07 << (drive->dn * 4));
 200                 tmp16 |= ((speed & 0x07) << (drive->dn * 4));
 201                 pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16);
 202         } else {
 203                 if ((speed >= XFER_MW_DMA_0) && (speed <= XFER_MW_DMA_2)) {
 204                         save_mdma_mode[drive->dn] = speed;
 205                         pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32);
 206                         tmp32 &= ~(0xff << timing_shift);
 207                         tmp32 |= (mdma_timing[speed & 0x03].recover_width << timing_shift) |
 208                                 (mdma_timing[speed & 0x03].command_width << (timing_shift + 4));
 209                         pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32);
 210                 }
 211         }
 212
 213         spin_unlock_irqrestore(&atiixp_lock, flags);
 214
 215         if (speed >= XFER_SW_DMA_0)
 216                 pio = atiixp_dma_2_pio(speed);
 217         else
 218                 pio = speed - XFER_PIO_0;
 219
 220         atiixp_tuneproc(drive, pio);
 221
 222         return ide_config_drive_speed(drive, speed);
 223 }
 224
 225 /**
 226  *      atiixp_config_drive_for_dma     -       configure drive for DMA
 227  *      @drive: IDE drive to configure
 228  *
 229  *      Set up a ATIIXP interface channel for the best available speed.
 230  *      We prefer UDMA if it is available and then MWDMA. If DMA is
 231  *      not available we switch to PIO and return 0.
 232  */
 233
 234 static int atiixp_config_drive_for_dma(ide_drive_t *drive)
 235 {
 236         u8 speed = ide_dma_speed(drive, atiixp_ratemask(drive));
 237
 238         if (!speed)
 239                 return 0;
 240
 241         (void) atiixp_speedproc(drive, speed);
 242         return ide_dma_enable(drive);
 243 }
 244
 245 /**
 246  *      atiixp_dma_check        -       set up an IDE device
 247  *      @drive: IDE drive to configure
 248  *
 249  *      Set up the ATIIXP interface for the best available speed on this
 250  *      interface, preferring DMA to PIO.
 251  */
 252
 253 static int atiixp_dma_check(ide_drive_t *drive)
 254 {
 255         u8 tspeed, speed;
 256
 257         drive->init_speed = 0;
 258
 259         if (ide_use_dma(drive) && atiixp_config_drive_for_dma(drive))
 260                 return 0;
 261
 262         if (ide_use_fast_pio(drive)) {
 263                 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
 264                 speed = atiixp_dma_2_pio(XFER_PIO_0 + tspeed) + XFER_PIO_0;
 265                 atiixp_speedproc(drive, speed);
 266         }
 267
 268         return -1;
 269 }
 270
 271 /**
 272  *      init_hwif_atiixp                -       fill in the hwif for the ATIIXP
 273  *      @hwif: IDE interface
 274  *
 275  *      Set up the ide_hwif_t for the ATIIXP interface according to the
 276  *      capabilities of the hardware.
 277  */
 278
 279 static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
 280 {
 281         u8 udma_mode = 0;
 282         u8 ch = hwif->channel;
 283         struct pci_dev *pdev = hwif->pci_dev;
 284
 285         if (!hwif->irq)
 286                 hwif->irq = ch ? 15 : 14;
 287
 288         hwif->autodma = 0;
 289         hwif->tuneproc = &atiixp_tuneproc;
 290         hwif->speedproc = &atiixp_speedproc;
 291         hwif->drives[0].autotune = 1;
 292         hwif->drives[1].autotune = 1;
 293
 294         if (!hwif->dma_base)
 295                 return;
 296
 297         hwif->atapi_dma = 1;
 298         hwif->ultra_mask = 0x3f;
 299         hwif->mwdma_mask = 0x06;
 300         hwif->swdma_mask = 0x04;
 301
 302         pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ch, &udma_mode);
 303         if ((udma_mode & 0x07) >= 0x04 || (udma_mode & 0x70) >= 0x40)
 304                 hwif->udma_four = 1;
 305         else
 306                 hwif->udma_four = 0;
 307
 308         hwif->dma_host_on = &atiixp_dma_host_on;
 309         hwif->dma_host_off = &atiixp_dma_host_off;
 310         hwif->ide_dma_check = &atiixp_dma_check;
 311         if (!noautodma)
 312                 hwif->autodma = 1;
 313
 314         hwif->drives[1].autodma = hwif->autodma;
 315         hwif->drives[0].autodma = hwif->autodma;
 316 }
 317
 318
 319 static ide_pci_device_t atiixp_pci_info[] __devinitdata = {
 320         {       /* 0 */
 321                 .name           = "ATIIXP",
 322                 .init_hwif      = init_hwif_atiixp,
 323                 .channels       = 2,
 324                 .autodma        = AUTODMA,
 325                 .enablebits     = {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
 326                 .bootable       = ON_BOARD,
 327         },{     /* 1 */
 328                 .name           = "SB600_PATA",
 329                 .init_hwif      = init_hwif_atiixp,
 330                 .channels       = 1,
 331                 .autodma        = AUTODMA,
 332                 .enablebits     = {{0x48,0x01,0x00}, {0x00,0x00,0x00}},
 333                 .bootable       = ON_BOARD,
 334         },
 335 };
 336
 337 /**
 338  *      atiixp_init_one -       called when a ATIIXP is found
 339  *      @dev: the atiixp device
 340  *      @id: the matching pci id
 341  *
 342  *      Called when the PCI registration layer (or the IDE initialization)
 343  *      finds a device matching our IDE device tables.
 344  */
 345
 346 static int __devinit atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 347 {
 348         return ide_setup_pci_device(dev, &atiixp_pci_info[id->driver_data]);
 349 }
 350
 351 static struct pci_device_id atiixp_pci_tbl[] = {
 352         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP200_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 353         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP300_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 354         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 355         { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
 356         { 0, },
 357 };
 358 MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);
 359
 360 static struct pci_driver driver = {
 361         .name           = "ATIIXP_IDE",
 362         .id_table       = atiixp_pci_tbl,
 363         .probe          = atiixp_init_one,
 364 };
 365
 366 static int __init atiixp_ide_init(void)
 367 {
 368         return ide_pci_register_driver(&driver);
 369 }
 370
 371 module_init(atiixp_ide_init);
 372
 373 MODULE_AUTHOR("HUI YU");
 374 MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
 375 MODULE_LICENSE("GPL");