drivers/ata/pata_artop.c

   1 /*
   2  *    pata_artop.c - ARTOP ATA controller driver
   3  *
   4  *      (C) 2006 Red Hat <alan@redhat.com>
   5  *
   6  *    Based in part on drivers/ide/pci/aec62xx.c
   7  *      Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org>
   8  *      865/865R fixes for Macintosh card version from a patch to the old
   9  *              driver by Thibaut VARENE <varenet@parisc-linux.org>
  10  *      When setting the PCI latency we must set 0x80 or higher for burst
  11  *              performance Alessandro Zummo <alessandro.zummo@towertech.it>
  12  *
  13  *      TODO
  14  *      850 serialization once the core supports it
  15  *      Investigate no_dsc on 850R
  16  *      Clock detect
  17  */
  18
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/pci.h>
  22 #include <linux/init.h>
  23 #include <linux/blkdev.h>
  24 #include <linux/delay.h>
  25 #include <linux/device.h>
  26 #include <scsi/scsi_host.h>
  27 #include <linux/libata.h>
  28 #include <linux/ata.h>
  29
  30 #define DRV_NAME        "pata_artop"
  31 #define DRV_VERSION     "0.4.3"
  32
  33 /*
  34  *      The ARTOP has 33 Mhz and "over clocked" timing tables. Until we
  35  *      get PCI bus speed functionality we leave this as 0. Its a variable
  36  *      for when we get the functionality and also for folks wanting to
  37  *      test stuff.
  38  */
  39
  40 static int clock = 0;
  41
  42 static int artop6210_pre_reset(struct ata_port *ap, unsigned long deadline)
  43 {
  44         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  45         const struct pci_bits artop_enable_bits[] = {
  46                 { 0x4AU, 1U, 0x02UL, 0x02UL },  /* port 0 */
  47                 { 0x4AU, 1U, 0x04UL, 0x04UL },  /* port 1 */
  48         };
  49
  50         if (!pci_test_config_bits(pdev, &artop_enable_bits[ap->port_no]))
  51                 return -ENOENT;
  52
  53         return ata_std_prereset(ap, deadline);
  54 }
  55
  56 /**
  57  *      artop6210_error_handler - Probe specified port on PATA host controller
  58  *      @ap: Port to probe
  59  *
  60  *      LOCKING:
  61  *      None (inherited from caller).
  62  */
  63
  64 static void artop6210_error_handler(struct ata_port *ap)
  65 {
  66         ata_bmdma_drive_eh(ap, artop6210_pre_reset,
  67                                     ata_std_softreset, NULL,
  68                                     ata_std_postreset);
  69 }
  70
  71 /**
  72  *      artop6260_pre_reset     -       check for 40/80 pin
  73  *      @ap: Port
  74  *      @deadline: deadline jiffies for the operation
  75  *
  76  *      The ARTOP hardware reports the cable detect bits in register 0x49.
  77  *      Nothing complicated needed here.
  78  */
  79
  80 static int artop6260_pre_reset(struct ata_port *ap, unsigned long deadline)
  81 {
  82         static const struct pci_bits artop_enable_bits[] = {
  83                 { 0x4AU, 1U, 0x02UL, 0x02UL },  /* port 0 */
  84                 { 0x4AU, 1U, 0x04UL, 0x04UL },  /* port 1 */
  85         };
  86
  87         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  88
  89         /* Odd numbered device ids are the units with enable bits (the -R cards) */
  90         if (pdev->device % 1 && !pci_test_config_bits(pdev, &artop_enable_bits[ap->port_no]))
  91                 return -ENOENT;
  92
  93         return ata_std_prereset(ap, deadline);
  94 }
  95
  96 /**
  97  *      artop6260_cable_detect  -       identify cable type
  98  *      @ap: Port
  99  *
 100  *      Identify the cable type for the ARTOP interface in question
 101  */
 102
 103 static int artop6260_cable_detect(struct ata_port *ap)
 104 {
 105         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 106         u8 tmp;
 107         pci_read_config_byte(pdev, 0x49, &tmp);
 108         if (tmp & (1 << ap->port_no))
 109                 return ATA_CBL_PATA40;
 110         return ATA_CBL_PATA80;
 111 }
 112
 113 /**
 114  *      artop6260_error_handler - Probe specified port on PATA host controller
 115  *      @ap: Port to probe
 116  *
 117  *      LOCKING:
 118  *      None (inherited from caller).
 119  */
 120
 121 static void artop6260_error_handler(struct ata_port *ap)
 122 {
 123         ata_bmdma_drive_eh(ap, artop6260_pre_reset,
 124                                     ata_std_softreset, NULL,
 125                                     ata_std_postreset);
 126 }
 127
 128 /**
 129  *      artop6210_load_piomode - Load a set of PATA PIO timings
 130  *      @ap: Port whose timings we are configuring
 131  *      @adev: Device
 132  *      @pio: PIO mode
 133  *
 134  *      Set PIO mode for device, in host controller PCI config space. This
 135  *      is used both to set PIO timings in PIO mode and also to set the
 136  *      matching PIO clocking for UDMA, as well as the MWDMA timings.
 137  *
 138  *      LOCKING:
 139  *      None (inherited from caller).
 140  */
 141
 142 static void artop6210_load_piomode(struct ata_port *ap, struct ata_device *adev, unsigned int pio)
 143 {
 144         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 145         int dn = adev->devno + 2 * ap->port_no;
 146         const u16 timing[2][5] = {
 147                 { 0x0000, 0x000A, 0x0008, 0x0303, 0x0301 },
 148                 { 0x0700, 0x070A, 0x0708, 0x0403, 0x0401 }
 149
 150         };
 151         /* Load the PIO timing active/recovery bits */
 152         pci_write_config_word(pdev, 0x40 + 2 * dn, timing[clock][pio]);
 153 }
 154
 155 /**
 156  *      artop6210_set_piomode - Initialize host controller PATA PIO timings
 157  *      @ap: Port whose timings we are configuring
 158  *      @adev: Device we are configuring
 159  *
 160  *      Set PIO mode for device, in host controller PCI config space. For
 161  *      ARTOP we must also clear the UDMA bits if we are not doing UDMA. In
 162  *      the event UDMA is used the later call to set_dmamode will set the
 163  *      bits as required.
 164  *
 165  *      LOCKING:
 166  *      None (inherited from caller).
 167  */
 168
 169 static void artop6210_set_piomode(struct ata_port *ap, struct ata_device *adev)
 170 {
 171         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 172         int dn = adev->devno + 2 * ap->port_no;
 173         u8 ultra;
 174
 175         artop6210_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
 176
 177         /* Clear the UDMA mode bits (set_dmamode will redo this if needed) */
 178         pci_read_config_byte(pdev, 0x54, &ultra);
 179         ultra &= ~(3 << (2 * dn));
 180         pci_write_config_byte(pdev, 0x54, ultra);
 181 }
 182
 183 /**
 184  *      artop6260_load_piomode - Initialize host controller PATA PIO timings
 185  *      @ap: Port whose timings we are configuring
 186  *      @adev: Device we are configuring
 187  *      @pio: PIO mode
 188  *
 189  *      Set PIO mode for device, in host controller PCI config space. The
 190  *      ARTOP6260 and relatives store the timing data differently.
 191  *
 192  *      LOCKING:
 193  *      None (inherited from caller).
 194  */
 195
 196 static void artop6260_load_piomode (struct ata_port *ap, struct ata_device *adev, unsigned int pio)
 197 {
 198         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 199         int dn = adev->devno + 2 * ap->port_no;
 200         const u8 timing[2][5] = {
 201                 { 0x00, 0x0A, 0x08, 0x33, 0x31 },
 202                 { 0x70, 0x7A, 0x78, 0x43, 0x41 }
 203
 204         };
 205         /* Load the PIO timing active/recovery bits */
 206         pci_write_config_byte(pdev, 0x40 + dn, timing[clock][pio]);
 207 }
 208
 209 /**
 210  *      artop6260_set_piomode - Initialize host controller PATA PIO timings
 211  *      @ap: Port whose timings we are configuring
 212  *      @adev: Device we are configuring
 213  *
 214  *      Set PIO mode for device, in host controller PCI config space. For
 215  *      ARTOP we must also clear the UDMA bits if we are not doing UDMA. In
 216  *      the event UDMA is used the later call to set_dmamode will set the
 217  *      bits as required.
 218  *
 219  *      LOCKING:
 220  *      None (inherited from caller).
 221  */
 222
 223 static void artop6260_set_piomode(struct ata_port *ap, struct ata_device *adev)
 224 {
 225         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 226         u8 ultra;
 227
 228         artop6260_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
 229
 230         /* Clear the UDMA mode bits (set_dmamode will redo this if needed) */
 231         pci_read_config_byte(pdev, 0x44 + ap->port_no, &ultra);
 232         ultra &= ~(7 << (4  * adev->devno));    /* One nibble per drive */
 233         pci_write_config_byte(pdev, 0x44 + ap->port_no, ultra);
 234 }
 235
 236 /**
 237  *      artop6210_set_dmamode - Initialize host controller PATA PIO timings
 238  *      @ap: Port whose timings we are configuring
 239  *      @adev: Device whose timings we are configuring
 240  *
 241  *      Set DMA mode for device, in host controller PCI config space.
 242  *
 243  *      LOCKING:
 244  *      None (inherited from caller).
 245  */
 246
 247 static void artop6210_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 248 {
 249         unsigned int pio;
 250         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 251         int dn = adev->devno + 2 * ap->port_no;
 252         u8 ultra;
 253
 254         if (adev->dma_mode == XFER_MW_DMA_0)
 255                 pio = 1;
 256         else
 257                 pio = 4;
 258
 259         /* Load the PIO timing active/recovery bits */
 260         artop6210_load_piomode(ap, adev, pio);
 261
 262         pci_read_config_byte(pdev, 0x54, &ultra);
 263         ultra &= ~(3 << (2 * dn));
 264
 265         /* Add ultra DMA bits if in UDMA mode */
 266         if (adev->dma_mode >= XFER_UDMA_0) {
 267                 u8 mode = (adev->dma_mode - XFER_UDMA_0) + 1 - clock;
 268                 if (mode == 0)
 269                         mode = 1;
 270                 ultra |= (mode << (2 * dn));
 271         }
 272         pci_write_config_byte(pdev, 0x54, ultra);
 273 }
 274
 275 /**
 276  *      artop6260_set_dmamode - Initialize host controller PATA PIO timings
 277  *      @ap: Port whose timings we are configuring
 278  *      @adev: Device we are configuring
 279  *
 280  *      Set DMA mode for device, in host controller PCI config space. The
 281  *      ARTOP6260 and relatives store the timing data differently.
 282  *
 283  *      LOCKING:
 284  *      None (inherited from caller).
 285  */
 286
 287 static void artop6260_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 288 {
 289         unsigned int pio        = adev->pio_mode - XFER_PIO_0;
 290         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 291         u8 ultra;
 292
 293         if (adev->dma_mode == XFER_MW_DMA_0)
 294                 pio = 1;
 295         else
 296                 pio = 4;
 297
 298         /* Load the PIO timing active/recovery bits */
 299         artop6260_load_piomode(ap, adev, pio);
 300
 301         /* Add ultra DMA bits if in UDMA mode */
 302         pci_read_config_byte(pdev, 0x44 + ap->port_no, &ultra);
 303         ultra &= ~(7 << (4  * adev->devno));    /* One nibble per drive */
 304         if (adev->dma_mode >= XFER_UDMA_0) {
 305                 u8 mode = adev->dma_mode - XFER_UDMA_0 + 1 - clock;
 306                 if (mode == 0)
 307                         mode = 1;
 308                 ultra |= (mode << (4 * adev->devno));
 309         }
 310         pci_write_config_byte(pdev, 0x44 + ap->port_no, ultra);
 311 }
 312
 313 static struct scsi_host_template artop_sht = {
 314         .module                 = THIS_MODULE,
 315         .name                   = DRV_NAME,
 316         .ioctl                  = ata_scsi_ioctl,
 317         .queuecommand           = ata_scsi_queuecmd,
 318         .can_queue              = ATA_DEF_QUEUE,
 319         .this_id                = ATA_SHT_THIS_ID,
 320         .sg_tablesize           = LIBATA_MAX_PRD,
 321         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 322         .emulated               = ATA_SHT_EMULATED,
 323         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 324         .proc_name              = DRV_NAME,
 325         .dma_boundary           = ATA_DMA_BOUNDARY,
 326         .slave_configure        = ata_scsi_slave_config,
 327         .slave_destroy          = ata_scsi_slave_destroy,
 328         .bios_param             = ata_std_bios_param,
 329 };
 330
 331 static const struct ata_port_operations artop6210_ops = {
 332         .port_disable           = ata_port_disable,
 333         .set_piomode            = artop6210_set_piomode,
 334         .set_dmamode            = artop6210_set_dmamode,
 335         .mode_filter            = ata_pci_default_filter,
 336
 337         .tf_load                = ata_tf_load,
 338         .tf_read                = ata_tf_read,
 339         .check_status           = ata_check_status,
 340         .exec_command           = ata_exec_command,
 341         .dev_select             = ata_std_dev_select,
 342
 343         .freeze                 = ata_bmdma_freeze,
 344         .thaw                   = ata_bmdma_thaw,
 345         .error_handler          = artop6210_error_handler,
 346         .post_internal_cmd      = ata_bmdma_post_internal_cmd,
 347         .cable_detect           = ata_cable_40wire,
 348
 349         .bmdma_setup            = ata_bmdma_setup,
 350         .bmdma_start            = ata_bmdma_start,
 351         .bmdma_stop             = ata_bmdma_stop,
 352         .bmdma_status           = ata_bmdma_status,
 353         .qc_prep                = ata_qc_prep,
 354         .qc_issue               = ata_qc_issue_prot,
 355
 356         .data_xfer              = ata_data_xfer,
 357
 358         .irq_handler            = ata_interrupt,
 359         .irq_clear              = ata_bmdma_irq_clear,
 360         .irq_on                 = ata_irq_on,
 361         .irq_ack                = ata_irq_ack,
 362
 363         .port_start             = ata_port_start,
 364 };
 365
 366 static const struct ata_port_operations artop6260_ops = {
 367         .port_disable           = ata_port_disable,
 368         .set_piomode            = artop6260_set_piomode,
 369         .set_dmamode            = artop6260_set_dmamode,
 370
 371         .tf_load                = ata_tf_load,
 372         .tf_read                = ata_tf_read,
 373         .check_status           = ata_check_status,
 374         .exec_command           = ata_exec_command,
 375         .dev_select             = ata_std_dev_select,
 376
 377         .freeze                 = ata_bmdma_freeze,
 378         .thaw                   = ata_bmdma_thaw,
 379         .error_handler          = artop6260_error_handler,
 380         .post_internal_cmd      = ata_bmdma_post_internal_cmd,
 381         .cable_detect           = artop6260_cable_detect,
 382
 383         .bmdma_setup            = ata_bmdma_setup,
 384         .bmdma_start            = ata_bmdma_start,
 385         .bmdma_stop             = ata_bmdma_stop,
 386         .bmdma_status           = ata_bmdma_status,
 387         .qc_prep                = ata_qc_prep,
 388         .qc_issue               = ata_qc_issue_prot,
 389         .data_xfer              = ata_data_xfer,
 390
 391         .irq_handler            = ata_interrupt,
 392         .irq_clear              = ata_bmdma_irq_clear,
 393         .irq_on                 = ata_irq_on,
 394         .irq_ack                = ata_irq_ack,
 395
 396         .port_start             = ata_port_start,
 397 };
 398
 399
 400 /**
 401  *      artop_init_one - Register ARTOP ATA PCI device with kernel services
 402  *      @pdev: PCI device to register
 403  *      @ent: Entry in artop_pci_tbl matching with @pdev
 404  *
 405  *      Called from kernel PCI layer.
 406  *
 407  *      LOCKING:
 408  *      Inherited from PCI layer (may sleep).
 409  *
 410  *      RETURNS:
 411  *      Zero on success, or -ERRNO value.
 412  */
 413
 414 static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 415 {
 416         static int printed_version;
 417         static const struct ata_port_info info_6210 = {
 418                 .sht            = &artop_sht,
 419                 .flags          = ATA_FLAG_SLAVE_POSS,
 420                 .pio_mask       = 0x1f, /* pio0-4 */
 421                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 422                 .udma_mask      = ATA_UDMA2,
 423                 .port_ops       = &artop6210_ops,
 424         };
 425         static const struct ata_port_info info_626x = {
 426                 .sht            = &artop_sht,
 427                 .flags          = ATA_FLAG_SLAVE_POSS,
 428                 .pio_mask       = 0x1f, /* pio0-4 */
 429                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 430                 .udma_mask      = ATA_UDMA4,
 431                 .port_ops       = &artop6260_ops,
 432         };
 433         static const struct ata_port_info info_626x_fast = {
 434                 .sht            = &artop_sht,
 435                 .flags          = ATA_FLAG_SLAVE_POSS,
 436                 .pio_mask       = 0x1f, /* pio0-4 */
 437                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 438                 .udma_mask      = ATA_UDMA5,
 439                 .port_ops       = &artop6260_ops,
 440         };
 441         const struct ata_port_info *ppi[] = { NULL, NULL };
 442
 443         if (!printed_version++)
 444                 dev_printk(KERN_DEBUG, &pdev->dev,
 445                            "version " DRV_VERSION "\n");
 446
 447         if (id->driver_data == 0) {     /* 6210 variant */
 448                 ppi[0] = &info_6210;
 449                 ppi[1] = &ata_dummy_port_info;
 450                 /* BIOS may have left us in UDMA, clear it before libata probe */
 451                 pci_write_config_byte(pdev, 0x54, 0);
 452                 /* For the moment (also lacks dsc) */
 453                 printk(KERN_WARNING "ARTOP 6210 requires serialize functionality not yet supported by libata.\n");
 454                 printk(KERN_WARNING "Secondary ATA ports will not be activated.\n");
 455         }
 456         else if (id->driver_data == 1)  /* 6260 */
 457                 ppi[0] = &info_626x;
 458         else if (id->driver_data == 2)  { /* 6260 or 6260 + fast */
 459                 unsigned long io = pci_resource_start(pdev, 4);
 460                 u8 reg;
 461
 462                 ppi[0] = &info_626x;
 463                 if (inb(io) & 0x10)
 464                         ppi[0] = &info_626x_fast;
 465                 /* Mac systems come up with some registers not set as we
 466                    will need them */
 467
 468                 /* Clear reset & test bits */
 469                 pci_read_config_byte(pdev, 0x49, &reg);
 470                 pci_write_config_byte(pdev, 0x49, reg & ~ 0x30);
 471
 472                 /* PCI latency must be > 0x80 for burst mode, tweak it
 473                  * if required.
 474                  */
 475                 pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &reg);
 476                 if (reg <= 0x80)
 477                         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x90);
 478
 479                 /* Enable IRQ output and burst mode */
 480                 pci_read_config_byte(pdev, 0x4a, &reg);
 481                 pci_write_config_byte(pdev, 0x4a, (reg & ~0x01) | 0x80);
 482
 483         }
 484
 485         BUG_ON(ppi[0] == NULL);
 486
 487         return ata_pci_init_one(pdev, ppi);
 488 }
 489
 490 static const struct pci_device_id artop_pci_tbl[] = {
 491         { PCI_VDEVICE(ARTOP, 0x0005), 0 },
 492         { PCI_VDEVICE(ARTOP, 0x0006), 1 },
 493         { PCI_VDEVICE(ARTOP, 0x0007), 1 },
 494         { PCI_VDEVICE(ARTOP, 0x0008), 2 },
 495         { PCI_VDEVICE(ARTOP, 0x0009), 2 },
 496
 497         { }     /* terminate list */
 498 };
 499
 500 static struct pci_driver artop_pci_driver = {
 501         .name                   = DRV_NAME,
 502         .id_table               = artop_pci_tbl,
 503         .probe                  = artop_init_one,
 504         .remove                 = ata_pci_remove_one,
 505 };
 506
 507 static int __init artop_init(void)
 508 {
 509         return pci_register_driver(&artop_pci_driver);
 510 }
 511
 512 static void __exit artop_exit(void)
 513 {
 514         pci_unregister_driver(&artop_pci_driver);
 515 }
 516
 517 module_init(artop_init);
 518 module_exit(artop_exit);
 519
 520 MODULE_AUTHOR("Alan Cox");
 521 MODULE_DESCRIPTION("SCSI low-level driver for ARTOP PATA");
 522 MODULE_LICENSE("GPL");
 523 MODULE_DEVICE_TABLE(pci, artop_pci_tbl);
 524 MODULE_VERSION(DRV_VERSION);
 525