drivers/ata/pata_artop.c

   1 /*
   2  *    pata_artop.c - ARTOP ATA controller driver
   3  *
   4  *      (C) 2006 Red Hat <alan@redhat.com>
   5  *      (C) 2007 Bartlomiej Zolnierkiewicz
   6  *
   7  *    Based in part on drivers/ide/pci/aec62xx.c
   8  *      Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org>
   9  *      865/865R fixes for Macintosh card version from a patch to the old
  10  *              driver by Thibaut VARENE <varenet@parisc-linux.org>
  11  *      When setting the PCI latency we must set 0x80 or higher for burst
  12  *              performance Alessandro Zummo <alessandro.zummo@towertech.it>
  13  *
  14  *      TODO
  15  *      850 serialization once the core supports it
  16  *      Investigate no_dsc on 850R
  17  *      Clock detect
  18  */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/module.h>
  22 #include <linux/pci.h>
  23 #include <linux/init.h>
  24 #include <linux/blkdev.h>
  25 #include <linux/delay.h>
  26 #include <linux/device.h>
  27 #include <scsi/scsi_host.h>
  28 #include <linux/libata.h>
  29 #include <linux/ata.h>
  30
  31 #define DRV_NAME        "pata_artop"
  32 #define DRV_VERSION     "0.4.4"
  33
  34 /*
  35  *      The ARTOP has 33 Mhz and "over clocked" timing tables. Until we
  36  *      get PCI bus speed functionality we leave this as 0. Its a variable
  37  *      for when we get the functionality and also for folks wanting to
  38  *      test stuff.
  39  */
  40
  41 static int clock = 0;
  42
  43 static int artop6210_pre_reset(struct ata_port *ap, unsigned long deadline)
  44 {
  45         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  46         const struct pci_bits artop_enable_bits[] = {
  47                 { 0x4AU, 1U, 0x02UL, 0x02UL },  /* port 0 */
  48                 { 0x4AU, 1U, 0x04UL, 0x04UL },  /* port 1 */
  49         };
  50
  51         if (!pci_test_config_bits(pdev, &artop_enable_bits[ap->port_no]))
  52                 return -ENOENT;
  53
  54         return ata_std_prereset(ap, deadline);
  55 }
  56
  57 /**
  58  *      artop6210_error_handler - Probe specified port on PATA host controller
  59  *      @ap: Port to probe
  60  *
  61  *      LOCKING:
  62  *      None (inherited from caller).
  63  */
  64
  65 static void artop6210_error_handler(struct ata_port *ap)
  66 {
  67         ata_bmdma_drive_eh(ap, artop6210_pre_reset,
  68                                     ata_std_softreset, NULL,
  69                                     ata_std_postreset);
  70 }
  71
  72 /**
  73  *      artop6260_pre_reset     -       check for 40/80 pin
  74  *      @ap: Port
  75  *      @deadline: deadline jiffies for the operation
  76  *
  77  *      The ARTOP hardware reports the cable detect bits in register 0x49.
  78  *      Nothing complicated needed here.
  79  */
  80
  81 static int artop6260_pre_reset(struct ata_port *ap, unsigned long deadline)
  82 {
  83         static const struct pci_bits artop_enable_bits[] = {
  84                 { 0x4AU, 1U, 0x02UL, 0x02UL },  /* port 0 */
  85                 { 0x4AU, 1U, 0x04UL, 0x04UL },  /* port 1 */
  86         };
  87
  88         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  89
  90         /* Odd numbered device ids are the units with enable bits (the -R cards) */
  91         if (pdev->device % 1 && !pci_test_config_bits(pdev, &artop_enable_bits[ap->port_no]))
  92                 return -ENOENT;
  93
  94         return ata_std_prereset(ap, deadline);
  95 }
  96
  97 /**
  98  *      artop6260_cable_detect  -       identify cable type
  99  *      @ap: Port
 100  *
 101  *      Identify the cable type for the ARTOP interface in question
 102  */
 103
 104 static int artop6260_cable_detect(struct ata_port *ap)
 105 {
 106         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 107         u8 tmp;
 108         pci_read_config_byte(pdev, 0x49, &tmp);
 109         if (tmp & (1 << ap->port_no))
 110                 return ATA_CBL_PATA40;
 111         return ATA_CBL_PATA80;
 112 }
 113
 114 /**
 115  *      artop6260_error_handler - Probe specified port on PATA host controller
 116  *      @ap: Port to probe
 117  *
 118  *      LOCKING:
 119  *      None (inherited from caller).
 120  */
 121
 122 static void artop6260_error_handler(struct ata_port *ap)
 123 {
 124         ata_bmdma_drive_eh(ap, artop6260_pre_reset,
 125                                     ata_std_softreset, NULL,
 126                                     ata_std_postreset);
 127 }
 128
 129 /**
 130  *      artop6210_load_piomode - Load a set of PATA PIO timings
 131  *      @ap: Port whose timings we are configuring
 132  *      @adev: Device
 133  *      @pio: PIO mode
 134  *
 135  *      Set PIO mode for device, in host controller PCI config space. This
 136  *      is used both to set PIO timings in PIO mode and also to set the
 137  *      matching PIO clocking for UDMA, as well as the MWDMA timings.
 138  *
 139  *      LOCKING:
 140  *      None (inherited from caller).
 141  */
 142
 143 static void artop6210_load_piomode(struct ata_port *ap, struct ata_device *adev, unsigned int pio)
 144 {
 145         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 146         int dn = adev->devno + 2 * ap->port_no;
 147         const u16 timing[2][5] = {
 148                 { 0x0000, 0x000A, 0x0008, 0x0303, 0x0301 },
 149                 { 0x0700, 0x070A, 0x0708, 0x0403, 0x0401 }
 150
 151         };
 152         /* Load the PIO timing active/recovery bits */
 153         pci_write_config_word(pdev, 0x40 + 2 * dn, timing[clock][pio]);
 154 }
 155
 156 /**
 157  *      artop6210_set_piomode - Initialize host controller PATA PIO timings
 158  *      @ap: Port whose timings we are configuring
 159  *      @adev: Device we are configuring
 160  *
 161  *      Set PIO mode for device, in host controller PCI config space. For
 162  *      ARTOP we must also clear the UDMA bits if we are not doing UDMA. In
 163  *      the event UDMA is used the later call to set_dmamode will set the
 164  *      bits as required.
 165  *
 166  *      LOCKING:
 167  *      None (inherited from caller).
 168  */
 169
 170 static void artop6210_set_piomode(struct ata_port *ap, struct ata_device *adev)
 171 {
 172         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 173         int dn = adev->devno + 2 * ap->port_no;
 174         u8 ultra;
 175
 176         artop6210_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
 177
 178         /* Clear the UDMA mode bits (set_dmamode will redo this if needed) */
 179         pci_read_config_byte(pdev, 0x54, &ultra);
 180         ultra &= ~(3 << (2 * dn));
 181         pci_write_config_byte(pdev, 0x54, ultra);
 182 }
 183
 184 /**
 185  *      artop6260_load_piomode - Initialize host controller PATA PIO timings
 186  *      @ap: Port whose timings we are configuring
 187  *      @adev: Device we are configuring
 188  *      @pio: PIO mode
 189  *
 190  *      Set PIO mode for device, in host controller PCI config space. The
 191  *      ARTOP6260 and relatives store the timing data differently.
 192  *
 193  *      LOCKING:
 194  *      None (inherited from caller).
 195  */
 196
 197 static void artop6260_load_piomode (struct ata_port *ap, struct ata_device *adev, unsigned int pio)
 198 {
 199         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 200         int dn = adev->devno + 2 * ap->port_no;
 201         const u8 timing[2][5] = {
 202                 { 0x00, 0x0A, 0x08, 0x33, 0x31 },
 203                 { 0x70, 0x7A, 0x78, 0x43, 0x41 }
 204
 205         };
 206         /* Load the PIO timing active/recovery bits */
 207         pci_write_config_byte(pdev, 0x40 + dn, timing[clock][pio]);
 208 }
 209
 210 /**
 211  *      artop6260_set_piomode - Initialize host controller PATA PIO timings
 212  *      @ap: Port whose timings we are configuring
 213  *      @adev: Device we are configuring
 214  *
 215  *      Set PIO mode for device, in host controller PCI config space. For
 216  *      ARTOP we must also clear the UDMA bits if we are not doing UDMA. In
 217  *      the event UDMA is used the later call to set_dmamode will set the
 218  *      bits as required.
 219  *
 220  *      LOCKING:
 221  *      None (inherited from caller).
 222  */
 223
 224 static void artop6260_set_piomode(struct ata_port *ap, struct ata_device *adev)
 225 {
 226         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 227         u8 ultra;
 228
 229         artop6260_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
 230
 231         /* Clear the UDMA mode bits (set_dmamode will redo this if needed) */
 232         pci_read_config_byte(pdev, 0x44 + ap->port_no, &ultra);
 233         ultra &= ~(7 << (4  * adev->devno));    /* One nibble per drive */
 234         pci_write_config_byte(pdev, 0x44 + ap->port_no, ultra);
 235 }
 236
 237 /**
 238  *      artop6210_set_dmamode - Initialize host controller PATA PIO timings
 239  *      @ap: Port whose timings we are configuring
 240  *      @adev: Device whose timings we are configuring
 241  *
 242  *      Set DMA mode for device, in host controller PCI config space.
 243  *
 244  *      LOCKING:
 245  *      None (inherited from caller).
 246  */
 247
 248 static void artop6210_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 249 {
 250         unsigned int pio;
 251         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 252         int dn = adev->devno + 2 * ap->port_no;
 253         u8 ultra;
 254
 255         if (adev->dma_mode == XFER_MW_DMA_0)
 256                 pio = 1;
 257         else
 258                 pio = 4;
 259
 260         /* Load the PIO timing active/recovery bits */
 261         artop6210_load_piomode(ap, adev, pio);
 262
 263         pci_read_config_byte(pdev, 0x54, &ultra);
 264         ultra &= ~(3 << (2 * dn));
 265
 266         /* Add ultra DMA bits if in UDMA mode */
 267         if (adev->dma_mode >= XFER_UDMA_0) {
 268                 u8 mode = (adev->dma_mode - XFER_UDMA_0) + 1 - clock;
 269                 if (mode == 0)
 270                         mode = 1;
 271                 ultra |= (mode << (2 * dn));
 272         }
 273         pci_write_config_byte(pdev, 0x54, ultra);
 274 }
 275
 276 /**
 277  *      artop6260_set_dmamode - Initialize host controller PATA PIO timings
 278  *      @ap: Port whose timings we are configuring
 279  *      @adev: Device we are configuring
 280  *
 281  *      Set DMA mode for device, in host controller PCI config space. The
 282  *      ARTOP6260 and relatives store the timing data differently.
 283  *
 284  *      LOCKING:
 285  *      None (inherited from caller).
 286  */
 287
 288 static void artop6260_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 289 {
 290         unsigned int pio        = adev->pio_mode - XFER_PIO_0;
 291         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 292         u8 ultra;
 293
 294         if (adev->dma_mode == XFER_MW_DMA_0)
 295                 pio = 1;
 296         else
 297                 pio = 4;
 298
 299         /* Load the PIO timing active/recovery bits */
 300         artop6260_load_piomode(ap, adev, pio);
 301
 302         /* Add ultra DMA bits if in UDMA mode */
 303         pci_read_config_byte(pdev, 0x44 + ap->port_no, &ultra);
 304         ultra &= ~(7 << (4  * adev->devno));    /* One nibble per drive */
 305         if (adev->dma_mode >= XFER_UDMA_0) {
 306                 u8 mode = adev->dma_mode - XFER_UDMA_0 + 1 - clock;
 307                 if (mode == 0)
 308                         mode = 1;
 309                 ultra |= (mode << (4 * adev->devno));
 310         }
 311         pci_write_config_byte(pdev, 0x44 + ap->port_no, ultra);
 312 }
 313
 314 static struct scsi_host_template artop_sht = {
 315         .module                 = THIS_MODULE,
 316         .name                   = DRV_NAME,
 317         .ioctl                  = ata_scsi_ioctl,
 318         .queuecommand           = ata_scsi_queuecmd,
 319         .can_queue              = ATA_DEF_QUEUE,
 320         .this_id                = ATA_SHT_THIS_ID,
 321         .sg_tablesize           = LIBATA_MAX_PRD,
 322         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 323         .emulated               = ATA_SHT_EMULATED,
 324         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 325         .proc_name              = DRV_NAME,
 326         .dma_boundary           = ATA_DMA_BOUNDARY,
 327         .slave_configure        = ata_scsi_slave_config,
 328         .slave_destroy          = ata_scsi_slave_destroy,
 329         .bios_param             = ata_std_bios_param,
 330 };
 331
 332 static const struct ata_port_operations artop6210_ops = {
 333         .port_disable           = ata_port_disable,
 334         .set_piomode            = artop6210_set_piomode,
 335         .set_dmamode            = artop6210_set_dmamode,
 336         .mode_filter            = ata_pci_default_filter,
 337
 338         .tf_load                = ata_tf_load,
 339         .tf_read                = ata_tf_read,
 340         .check_status           = ata_check_status,
 341         .exec_command           = ata_exec_command,
 342         .dev_select             = ata_std_dev_select,
 343
 344         .freeze                 = ata_bmdma_freeze,
 345         .thaw                   = ata_bmdma_thaw,
 346         .error_handler          = artop6210_error_handler,
 347         .post_internal_cmd      = ata_bmdma_post_internal_cmd,
 348         .cable_detect           = ata_cable_40wire,
 349
 350         .bmdma_setup            = ata_bmdma_setup,
 351         .bmdma_start            = ata_bmdma_start,
 352         .bmdma_stop             = ata_bmdma_stop,
 353         .bmdma_status           = ata_bmdma_status,
 354         .qc_prep                = ata_qc_prep,
 355         .qc_issue               = ata_qc_issue_prot,
 356
 357         .data_xfer              = ata_data_xfer,
 358
 359         .irq_handler            = ata_interrupt,
 360         .irq_clear              = ata_bmdma_irq_clear,
 361         .irq_on                 = ata_irq_on,
 362         .irq_ack                = ata_irq_ack,
 363
 364         .port_start             = ata_port_start,
 365 };
 366
 367 static const struct ata_port_operations artop6260_ops = {
 368         .port_disable           = ata_port_disable,
 369         .set_piomode            = artop6260_set_piomode,
 370         .set_dmamode            = artop6260_set_dmamode,
 371
 372         .tf_load                = ata_tf_load,
 373         .tf_read                = ata_tf_read,
 374         .check_status           = ata_check_status,
 375         .exec_command           = ata_exec_command,
 376         .dev_select             = ata_std_dev_select,
 377
 378         .freeze                 = ata_bmdma_freeze,
 379         .thaw                   = ata_bmdma_thaw,
 380         .error_handler          = artop6260_error_handler,
 381         .post_internal_cmd      = ata_bmdma_post_internal_cmd,
 382         .cable_detect           = artop6260_cable_detect,
 383
 384         .bmdma_setup            = ata_bmdma_setup,
 385         .bmdma_start            = ata_bmdma_start,
 386         .bmdma_stop             = ata_bmdma_stop,
 387         .bmdma_status           = ata_bmdma_status,
 388         .qc_prep                = ata_qc_prep,
 389         .qc_issue               = ata_qc_issue_prot,
 390         .data_xfer              = ata_data_xfer,
 391
 392         .irq_handler            = ata_interrupt,
 393         .irq_clear              = ata_bmdma_irq_clear,
 394         .irq_on                 = ata_irq_on,
 395         .irq_ack                = ata_irq_ack,
 396
 397         .port_start             = ata_port_start,
 398 };
 399
 400
 401 /**
 402  *      artop_init_one - Register ARTOP ATA PCI device with kernel services
 403  *      @pdev: PCI device to register
 404  *      @ent: Entry in artop_pci_tbl matching with @pdev
 405  *
 406  *      Called from kernel PCI layer.
 407  *
 408  *      LOCKING:
 409  *      Inherited from PCI layer (may sleep).
 410  *
 411  *      RETURNS:
 412  *      Zero on success, or -ERRNO value.
 413  */
 414
 415 static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 416 {
 417         static int printed_version;
 418         static const struct ata_port_info info_6210 = {
 419                 .sht            = &artop_sht,
 420                 .flags          = ATA_FLAG_SLAVE_POSS,
 421                 .pio_mask       = 0x1f, /* pio0-4 */
 422                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 423                 .udma_mask      = ATA_UDMA2,
 424                 .port_ops       = &artop6210_ops,
 425         };
 426         static const struct ata_port_info info_626x = {
 427                 .sht            = &artop_sht,
 428                 .flags          = ATA_FLAG_SLAVE_POSS,
 429                 .pio_mask       = 0x1f, /* pio0-4 */
 430                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 431                 .udma_mask      = ATA_UDMA4,
 432                 .port_ops       = &artop6260_ops,
 433         };
 434         static const struct ata_port_info info_628x = {
 435                 .sht            = &artop_sht,
 436                 .flags          = ATA_FLAG_SLAVE_POSS,
 437                 .pio_mask       = 0x1f, /* pio0-4 */
 438                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 439                 .udma_mask      = ATA_UDMA5,
 440                 .port_ops       = &artop6260_ops,
 441         };
 442         static const struct ata_port_info info_628x_fast = {
 443                 .sht            = &artop_sht,
 444                 .flags          = ATA_FLAG_SLAVE_POSS,
 445                 .pio_mask       = 0x1f, /* pio0-4 */
 446                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 447                 .udma_mask      = ATA_UDMA6,
 448                 .port_ops       = &artop6260_ops,
 449         };
 450         const struct ata_port_info *ppi[] = { NULL, NULL };
 451
 452         if (!printed_version++)
 453                 dev_printk(KERN_DEBUG, &pdev->dev,
 454                            "version " DRV_VERSION "\n");
 455
 456         if (id->driver_data == 0) {     /* 6210 variant */
 457                 ppi[0] = &info_6210;
 458                 ppi[1] = &ata_dummy_port_info;
 459                 /* BIOS may have left us in UDMA, clear it before libata probe */
 460                 pci_write_config_byte(pdev, 0x54, 0);
 461                 /* For the moment (also lacks dsc) */
 462                 printk(KERN_WARNING "ARTOP 6210 requires serialize functionality not yet supported by libata.\n");
 463                 printk(KERN_WARNING "Secondary ATA ports will not be activated.\n");
 464         }
 465         else if (id->driver_data == 1)  /* 6260 */
 466                 ppi[0] = &info_626x;
 467         else if (id->driver_data == 2)  { /* 6280 or 6280 + fast */
 468                 unsigned long io = pci_resource_start(pdev, 4);
 469                 u8 reg;
 470
 471                 ppi[0] = &info_628x;
 472                 if (inb(io) & 0x10)
 473                         ppi[0] = &info_628x_fast;
 474                 /* Mac systems come up with some registers not set as we
 475                    will need them */
 476
 477                 /* Clear reset & test bits */
 478                 pci_read_config_byte(pdev, 0x49, &reg);
 479                 pci_write_config_byte(pdev, 0x49, reg & ~ 0x30);
 480
 481                 /* PCI latency must be > 0x80 for burst mode, tweak it
 482                  * if required.
 483                  */
 484                 pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &reg);
 485                 if (reg <= 0x80)
 486                         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x90);
 487
 488                 /* Enable IRQ output and burst mode */
 489                 pci_read_config_byte(pdev, 0x4a, &reg);
 490                 pci_write_config_byte(pdev, 0x4a, (reg & ~0x01) | 0x80);
 491
 492         }
 493
 494         BUG_ON(ppi[0] == NULL);
 495
 496         return ata_pci_init_one(pdev, ppi);
 497 }
 498
 499 static const struct pci_device_id artop_pci_tbl[] = {
 500         { PCI_VDEVICE(ARTOP, 0x0005), 0 },
 501         { PCI_VDEVICE(ARTOP, 0x0006), 1 },
 502         { PCI_VDEVICE(ARTOP, 0x0007), 1 },
 503         { PCI_VDEVICE(ARTOP, 0x0008), 2 },
 504         { PCI_VDEVICE(ARTOP, 0x0009), 2 },
 505
 506         { }     /* terminate list */
 507 };
 508
 509 static struct pci_driver artop_pci_driver = {
 510         .name                   = DRV_NAME,
 511         .id_table               = artop_pci_tbl,
 512         .probe                  = artop_init_one,
 513         .remove                 = ata_pci_remove_one,
 514 };
 515
 516 static int __init artop_init(void)
 517 {
 518         return pci_register_driver(&artop_pci_driver);
 519 }
 520
 521 static void __exit artop_exit(void)
 522 {
 523         pci_unregister_driver(&artop_pci_driver);
 524 }
 525
 526 module_init(artop_init);
 527 module_exit(artop_exit);
 528
 529 MODULE_AUTHOR("Alan Cox");
 530 MODULE_DESCRIPTION("SCSI low-level driver for ARTOP PATA");
 531 MODULE_LICENSE("GPL");
 532 MODULE_DEVICE_TABLE(pci, artop_pci_tbl);
 533 MODULE_VERSION(DRV_VERSION);
 534