drivers/ata/pata_pdc202xx_old.c

   1 /*
   2  * pata_pdc202xx_old.c  - Promise PDC202xx PATA for new ATA layer
   3  *                        (C) 2005 Red Hat Inc
   4  *                        Alan Cox <alan@redhat.com>
   5  *
   6  * Based in part on linux/drivers/ide/pci/pdc202xx_old.c
   7  *
   8  * First cut with LBA48/ATAPI
   9  *
  10  * TODO:
  11  *      Channel interlock/reset on both required ?
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/module.h>
  16 #include <linux/pci.h>
  17 #include <linux/init.h>
  18 #include <linux/blkdev.h>
  19 #include <linux/delay.h>
  20 #include <scsi/scsi_host.h>
  21 #include <linux/libata.h>
  22
  23 #define DRV_NAME "pata_pdc202xx_old"
  24 #define DRV_VERSION "0.2.1"
  25
  26 /**
  27  *      pdc2024x_pre_reset              -       probe begin
  28  *      @ap: ATA port
  29  *
  30  *      Set up cable type and use generic probe init
  31  */
  32
  33 static int pdc2024x_pre_reset(struct ata_port *ap)
  34 {
  35         ap->cbl = ATA_CBL_PATA40;
  36         return ata_std_prereset(ap);
  37 }
  38
  39
  40 static void pdc2024x_error_handler(struct ata_port *ap)
  41 {
  42         ata_bmdma_drive_eh(ap, pdc2024x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
  43 }
  44
  45
  46 static int pdc2026x_pre_reset(struct ata_port *ap)
  47 {
  48         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  49         u16 cis;
  50
  51         pci_read_config_word(pdev, 0x50, &cis);
  52         if (cis & (1 << (10 + ap->port_no)))
  53                 ap->cbl = ATA_CBL_PATA80;
  54         else
  55                 ap->cbl = ATA_CBL_PATA40;
  56
  57         return ata_std_prereset(ap);
  58 }
  59
  60 static void pdc2026x_error_handler(struct ata_port *ap)
  61 {
  62         ata_bmdma_drive_eh(ap, pdc2026x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
  63 }
  64
  65 /**
  66  *      pdc_configure_piomode   -       set chip PIO timing
  67  *      @ap: ATA interface
  68  *      @adev: ATA device
  69  *      @pio: PIO mode
  70  *
  71  *      Called to do the PIO mode setup. Our timing registers are shared
  72  *      so a configure_dmamode call will undo any work we do here and vice
  73  *      versa
  74  */
  75
  76 static void pdc_configure_piomode(struct ata_port *ap, struct ata_device *adev, int pio)
  77 {
  78         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  79         int port = 0x60 + 4 * ap->port_no + 2 * adev->devno;
  80         static u16 pio_timing[5] = {
  81                 0x0913, 0x050C , 0x0308, 0x0206, 0x0104
  82         };
  83         u8 r_ap, r_bp;
  84
  85         pci_read_config_byte(pdev, port, &r_ap);
  86         pci_read_config_byte(pdev, port + 1, &r_bp);
  87         r_ap &= ~0x3F;  /* Preserve ERRDY_EN, SYNC_IN */
  88         r_bp &= ~0x07;
  89         r_ap |= (pio_timing[pio] >> 8);
  90         r_bp |= (pio_timing[pio] & 0xFF);
  91
  92         if (ata_pio_need_iordy(adev))
  93                 r_ap |= 0x20;   /* IORDY enable */
  94         if (adev->class == ATA_DEV_ATA)
  95                 r_ap |= 0x10;   /* FIFO enable */
  96         pci_write_config_byte(pdev, port, r_ap);
  97         pci_write_config_byte(pdev, port + 1, r_bp);
  98 }
  99
 100 /**
 101  *      pdc_set_piomode -       set initial PIO mode data
 102  *      @ap: ATA interface
 103  *      @adev: ATA device
 104  *
 105  *      Called to do the PIO mode setup. Our timing registers are shared
 106  *      but we want to set the PIO timing by default.
 107  */
 108
 109 static void pdc_set_piomode(struct ata_port *ap, struct ata_device *adev)
 110 {
 111         pdc_configure_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
 112 }
 113
 114 /**
 115  *      pdc_configure_dmamode   -       set DMA mode in chip
 116  *      @ap: ATA interface
 117  *      @adev: ATA device
 118  *
 119  *      Load DMA cycle times into the chip ready for a DMA transfer
 120  *      to occur.
 121  */
 122
 123 static void pdc_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 124 {
 125         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 126         int port = 0x60 + 4 * ap->port_no + 2 * adev->devno;
 127         static u8 udma_timing[6][2] = {
 128                 { 0x60, 0x03 }, /* 33 Mhz Clock */
 129                 { 0x40, 0x02 },
 130                 { 0x20, 0x01 },
 131                 { 0x40, 0x02 }, /* 66 Mhz Clock */
 132                 { 0x20, 0x01 },
 133                 { 0x20, 0x01 }
 134         };
 135         u8 r_bp, r_cp;
 136
 137         pci_read_config_byte(pdev, port + 1, &r_bp);
 138         pci_read_config_byte(pdev, port + 2, &r_cp);
 139
 140         r_bp &= ~0xF0;
 141         r_cp &= ~0x0F;
 142
 143         if (adev->dma_mode >= XFER_UDMA_0) {
 144                 int speed = adev->dma_mode - XFER_UDMA_0;
 145                 r_bp |= udma_timing[speed][0];
 146                 r_cp |= udma_timing[speed][1];
 147
 148         } else {
 149                 int speed = adev->dma_mode - XFER_MW_DMA_0;
 150                 r_bp |= 0x60;
 151                 r_cp |= (5 - speed);
 152         }
 153         pci_write_config_byte(pdev, port + 1, r_bp);
 154         pci_write_config_byte(pdev, port + 2, r_cp);
 155
 156 }
 157
 158 /**
 159  *      pdc2026x_bmdma_start            -       DMA engine begin
 160  *      @qc: ATA command
 161  *
 162  *      In UDMA3 or higher we have to clock switch for the duration of the
 163  *      DMA transfer sequence.
 164  */
 165
 166 static void pdc2026x_bmdma_start(struct ata_queued_cmd *qc)
 167 {
 168         struct ata_port *ap = qc->ap;
 169         struct ata_device *adev = qc->dev;
 170         struct ata_taskfile *tf = &qc->tf;
 171         int sel66 = ap->port_no ? 0x08: 0x02;
 172
 173         unsigned long master = ap->host->ports[0]->ioaddr.bmdma_addr;
 174         unsigned long clock = master + 0x11;
 175         unsigned long atapi_reg = master + 0x20 + (4 * ap->port_no);
 176
 177         u32 len;
 178
 179         /* Check we keep host level locking here */
 180         if (adev->dma_mode >= XFER_UDMA_2)
 181                 outb(inb(clock) | sel66, clock);
 182         else
 183                 outb(inb(clock) & ~sel66, clock);
 184
 185         /* The DMA clocks may have been trashed by a reset. FIXME: make conditional
 186            and move to qc_issue ? */
 187         pdc_set_dmamode(ap, qc->dev);
 188
 189         /* Cases the state machine will not complete correctly without help */
 190         if ((tf->flags & ATA_TFLAG_LBA48) ||  tf->protocol == ATA_PROT_ATAPI_DMA)
 191         {
 192                 if (tf->flags & ATA_TFLAG_LBA48)
 193                         len = qc->nsect * 512;
 194                 else
 195                         len = qc->nbytes;
 196
 197                 if (tf->flags & ATA_TFLAG_WRITE)
 198                         len |= 0x06000000;
 199                 else
 200                         len |= 0x05000000;
 201
 202                 outl(len, atapi_reg);
 203         }
 204
 205         /* Activate DMA */
 206         ata_bmdma_start(qc);
 207 }
 208
 209 /**
 210  *      pdc2026x_bmdma_end              -       DMA engine stop
 211  *      @qc: ATA command
 212  *
 213  *      After a DMA completes we need to put the clock back to 33MHz for
 214  *      PIO timings.
 215  */
 216
 217 static void pdc2026x_bmdma_stop(struct ata_queued_cmd *qc)
 218 {
 219         struct ata_port *ap = qc->ap;
 220         struct ata_device *adev = qc->dev;
 221         struct ata_taskfile *tf = &qc->tf;
 222
 223         int sel66 = ap->port_no ? 0x08: 0x02;
 224         /* The clock bits are in the same register for both channels */
 225         unsigned long master = ap->host->ports[0]->ioaddr.bmdma_addr;
 226         unsigned long clock = master + 0x11;
 227         unsigned long atapi_reg = master + 0x20 + (4 * ap->port_no);
 228
 229         /* Cases the state machine will not complete correctly */
 230         if (tf->protocol == ATA_PROT_ATAPI_DMA || ( tf->flags & ATA_TFLAG_LBA48)) {
 231                 outl(0, atapi_reg);
 232                 outb(inb(clock) & ~sel66, clock);
 233         }
 234         /* Check we keep host level locking here */
 235         /* Flip back to 33Mhz for PIO */
 236         if (adev->dma_mode >= XFER_UDMA_2)
 237                 outb(inb(clock) & ~sel66, clock);
 238
 239         ata_bmdma_stop(qc);
 240 }
 241
 242 /**
 243  *      pdc2026x_dev_config     -       device setup hook
 244  *      @ap: ATA port
 245  *      @adev: newly found device
 246  *
 247  *      Perform chip specific early setup. We need to lock the transfer
 248  *      sizes to 8bit to avoid making the state engine on the 2026x cards
 249  *      barf.
 250  */
 251
 252 static void pdc2026x_dev_config(struct ata_port *ap, struct ata_device *adev)
 253 {
 254         adev->max_sectors = 256;
 255 }
 256
 257 static struct scsi_host_template pdc_sht = {
 258         .module                 = THIS_MODULE,
 259         .name                   = DRV_NAME,
 260         .ioctl                  = ata_scsi_ioctl,
 261         .queuecommand           = ata_scsi_queuecmd,
 262         .can_queue              = ATA_DEF_QUEUE,
 263         .this_id                = ATA_SHT_THIS_ID,
 264         .sg_tablesize           = LIBATA_MAX_PRD,
 265         .max_sectors            = ATA_MAX_SECTORS,
 266         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 267         .emulated               = ATA_SHT_EMULATED,
 268         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 269         .proc_name              = DRV_NAME,
 270         .dma_boundary           = ATA_DMA_BOUNDARY,
 271         .slave_configure        = ata_scsi_slave_config,
 272         .slave_destroy          = ata_scsi_slave_destroy,
 273         .bios_param             = ata_std_bios_param,
 274 };
 275
 276 static struct ata_port_operations pdc2024x_port_ops = {
 277         .port_disable   = ata_port_disable,
 278         .set_piomode    = pdc_set_piomode,
 279         .set_dmamode    = pdc_set_dmamode,
 280         .mode_filter    = ata_pci_default_filter,
 281         .tf_load        = ata_tf_load,
 282         .tf_read        = ata_tf_read,
 283         .check_status   = ata_check_status,
 284         .exec_command   = ata_exec_command,
 285         .dev_select     = ata_std_dev_select,
 286
 287         .freeze         = ata_bmdma_freeze,
 288         .thaw           = ata_bmdma_thaw,
 289         .error_handler  = pdc2024x_error_handler,
 290         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 291
 292         .bmdma_setup    = ata_bmdma_setup,
 293         .bmdma_start    = ata_bmdma_start,
 294         .bmdma_stop     = ata_bmdma_stop,
 295         .bmdma_status   = ata_bmdma_status,
 296
 297         .qc_prep        = ata_qc_prep,
 298         .qc_issue       = ata_qc_issue_prot,
 299         .data_xfer      = ata_pio_data_xfer,
 300
 301         .irq_handler    = ata_interrupt,
 302         .irq_clear      = ata_bmdma_irq_clear,
 303
 304         .port_start     = ata_port_start,
 305         .port_stop      = ata_port_stop,
 306         .host_stop      = ata_host_stop
 307 };
 308
 309 static struct ata_port_operations pdc2026x_port_ops = {
 310         .port_disable   = ata_port_disable,
 311         .set_piomode    = pdc_set_piomode,
 312         .set_dmamode    = pdc_set_dmamode,
 313         .mode_filter    = ata_pci_default_filter,
 314         .tf_load        = ata_tf_load,
 315         .tf_read        = ata_tf_read,
 316         .check_status   = ata_check_status,
 317         .exec_command   = ata_exec_command,
 318         .dev_select     = ata_std_dev_select,
 319         .dev_config     = pdc2026x_dev_config,
 320
 321         .freeze         = ata_bmdma_freeze,
 322         .thaw           = ata_bmdma_thaw,
 323         .error_handler  = pdc2026x_error_handler,
 324         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 325
 326         .bmdma_setup    = ata_bmdma_setup,
 327         .bmdma_start    = pdc2026x_bmdma_start,
 328         .bmdma_stop     = pdc2026x_bmdma_stop,
 329         .bmdma_status   = ata_bmdma_status,
 330
 331         .qc_prep        = ata_qc_prep,
 332         .qc_issue       = ata_qc_issue_prot,
 333         .data_xfer      = ata_pio_data_xfer,
 334
 335         .irq_handler    = ata_interrupt,
 336         .irq_clear      = ata_bmdma_irq_clear,
 337
 338         .port_start     = ata_port_start,
 339         .port_stop      = ata_port_stop,
 340         .host_stop      = ata_host_stop
 341 };
 342
 343 static int pdc_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 344 {
 345         static struct ata_port_info info[3] = {
 346                 {
 347                         .sht = &pdc_sht,
 348                         .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 349                         .pio_mask = 0x1f,
 350                         .mwdma_mask = 0x07,
 351                         .udma_mask = ATA_UDMA2,
 352                         .port_ops = &pdc2024x_port_ops
 353                 },
 354                 {
 355                         .sht = &pdc_sht,
 356                         .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 357                         .pio_mask = 0x1f,
 358                         .mwdma_mask = 0x07,
 359                         .udma_mask = ATA_UDMA4,
 360                         .port_ops = &pdc2026x_port_ops
 361                 },
 362                 {
 363                         .sht = &pdc_sht,
 364                         .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 365                         .pio_mask = 0x1f,
 366                         .mwdma_mask = 0x07,
 367                         .udma_mask = ATA_UDMA5,
 368                         .port_ops = &pdc2026x_port_ops
 369                 }
 370
 371         };
 372         static struct ata_port_info *port_info[2];
 373
 374         port_info[0] = port_info[1] = &info[id->driver_data];
 375
 376         if (dev->device == PCI_DEVICE_ID_PROMISE_20265) {
 377                 struct pci_dev *bridge = dev->bus->self;
 378                 /* Don't grab anything behind a Promise I2O RAID */
 379                 if (bridge && bridge->vendor == PCI_VENDOR_ID_INTEL) {
 380                         if( bridge->device == PCI_DEVICE_ID_INTEL_I960)
 381                                 return -ENODEV;
 382                         if( bridge->device == PCI_DEVICE_ID_INTEL_I960RM)
 383                                 return -ENODEV;
 384                 }
 385         }
 386         return ata_pci_init_one(dev, port_info, 2);
 387 }
 388
 389 static const struct pci_device_id pdc[] = {
 390         { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20246), 0 },
 391         { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20262), 1 },
 392         { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20263), 1 },
 393         { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20265), 2 },
 394         { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20267), 2 },
 395
 396         { },
 397 };
 398
 399 static struct pci_driver pdc_pci_driver = {
 400         .name           = DRV_NAME,
 401         .id_table       = pdc,
 402         .probe          = pdc_init_one,
 403         .remove         = ata_pci_remove_one
 404 };
 405
 406 static int __init pdc_init(void)
 407 {
 408         return pci_register_driver(&pdc_pci_driver);
 409 }
 410
 411 static void __exit pdc_exit(void)
 412 {
 413         pci_unregister_driver(&pdc_pci_driver);
 414 }
 415
 416 MODULE_AUTHOR("Alan Cox");
 417 MODULE_DESCRIPTION("low-level driver for Promise 2024x and 20262-20267");
 418 MODULE_LICENSE("GPL");
 419 MODULE_DEVICE_TABLE(pci, pdc);
 420 MODULE_VERSION(DRV_VERSION);
 421
 422 module_init(pdc_init);
 423 module_exit(pdc_exit);