drivers/ata/pata_hpt366.c

   1 /*
   2  * Libata driver for the highpoint 366 and 368 UDMA66 ATA controllers.
   3  *
   4  * This driver is heavily based upon:
   5  *
   6  * linux/drivers/ide/pci/hpt366.c               Version 0.36    April 25, 2003
   7  *
   8  * Copyright (C) 1999-2003              Andre Hedrick <andre@linux-ide.org>
   9  * Portions Copyright (C) 2001          Sun Microsystems, Inc.
  10  * Portions Copyright (C) 2003          Red Hat Inc
  11  *
  12  *
  13  * TODO
  14  *      Maybe PLL mode
  15  *      Look into engine reset on timeout errors. Should not be
  16  *              required.
  17  */
  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 <scsi/scsi_host.h>
  27 #include <linux/libata.h>
  28
  29 #define DRV_NAME        "pata_hpt366"
  30 #define DRV_VERSION     "0.5.3"
  31
  32 struct hpt_clock {
  33         u8      xfer_speed;
  34         u32     timing;
  35 };
  36
  37 /* key for bus clock timings
  38  * bit
  39  * 0:3    data_high_time. inactive time of DIOW_/DIOR_ for PIO and MW
  40  *        DMA. cycles = value + 1
  41  * 4:8    data_low_time. active time of DIOW_/DIOR_ for PIO and MW
  42  *        DMA. cycles = value + 1
  43  * 9:12   cmd_high_time. inactive time of DIOW_/DIOR_ during task file
  44  *        register access.
  45  * 13:17  cmd_low_time. active time of DIOW_/DIOR_ during task file
  46  *        register access.
  47  * 18:21  udma_cycle_time. clock freq and clock cycles for UDMA xfer.
  48  *        during task file register access.
  49  * 22:24  pre_high_time. time to initialize 1st cycle for PIO and MW DMA
  50  *        xfer.
  51  * 25:27  cmd_pre_high_time. time to initialize 1st PIO cycle for task
  52  *        register access.
  53  * 28     UDMA enable
  54  * 29     DMA enable
  55  * 30     PIO_MST enable. if set, the chip is in bus master mode during
  56  *        PIO.
  57  * 31     FIFO enable.
  58  */
  59
  60 static const struct hpt_clock hpt366_40[] = {
  61         {       XFER_UDMA_4,    0x900fd943      },
  62         {       XFER_UDMA_3,    0x900ad943      },
  63         {       XFER_UDMA_2,    0x900bd943      },
  64         {       XFER_UDMA_1,    0x9008d943      },
  65         {       XFER_UDMA_0,    0x9008d943      },
  66
  67         {       XFER_MW_DMA_2,  0xa008d943      },
  68         {       XFER_MW_DMA_1,  0xa010d955      },
  69         {       XFER_MW_DMA_0,  0xa010d9fc      },
  70
  71         {       XFER_PIO_4,     0xc008d963      },
  72         {       XFER_PIO_3,     0xc010d974      },
  73         {       XFER_PIO_2,     0xc010d997      },
  74         {       XFER_PIO_1,     0xc010d9c7      },
  75         {       XFER_PIO_0,     0xc018d9d9      },
  76         {       0,              0x0120d9d9      }
  77 };
  78
  79 static const struct hpt_clock hpt366_33[] = {
  80         {       XFER_UDMA_4,    0x90c9a731      },
  81         {       XFER_UDMA_3,    0x90cfa731      },
  82         {       XFER_UDMA_2,    0x90caa731      },
  83         {       XFER_UDMA_1,    0x90cba731      },
  84         {       XFER_UDMA_0,    0x90c8a731      },
  85
  86         {       XFER_MW_DMA_2,  0xa0c8a731      },
  87         {       XFER_MW_DMA_1,  0xa0c8a732      },      /* 0xa0c8a733 */
  88         {       XFER_MW_DMA_0,  0xa0c8a797      },
  89
  90         {       XFER_PIO_4,     0xc0c8a731      },
  91         {       XFER_PIO_3,     0xc0c8a742      },
  92         {       XFER_PIO_2,     0xc0d0a753      },
  93         {       XFER_PIO_1,     0xc0d0a7a3      },      /* 0xc0d0a793 */
  94         {       XFER_PIO_0,     0xc0d0a7aa      },      /* 0xc0d0a7a7 */
  95         {       0,              0x0120a7a7      }
  96 };
  97
  98 static const struct hpt_clock hpt366_25[] = {
  99         {       XFER_UDMA_4,    0x90c98521      },
 100         {       XFER_UDMA_3,    0x90cf8521      },
 101         {       XFER_UDMA_2,    0x90cf8521      },
 102         {       XFER_UDMA_1,    0x90cb8521      },
 103         {       XFER_UDMA_0,    0x90cb8521      },
 104
 105         {       XFER_MW_DMA_2,  0xa0ca8521      },
 106         {       XFER_MW_DMA_1,  0xa0ca8532      },
 107         {       XFER_MW_DMA_0,  0xa0ca8575      },
 108
 109         {       XFER_PIO_4,     0xc0ca8521      },
 110         {       XFER_PIO_3,     0xc0ca8532      },
 111         {       XFER_PIO_2,     0xc0ca8542      },
 112         {       XFER_PIO_1,     0xc0d08572      },
 113         {       XFER_PIO_0,     0xc0d08585      },
 114         {       0,              0x01208585      }
 115 };
 116
 117 static const char *bad_ata33[] = {
 118         "Maxtor 92720U8", "Maxtor 92040U6", "Maxtor 91360U4", "Maxtor 91020U3", "Maxtor 90845U3", "Maxtor 90650U2",
 119         "Maxtor 91360D8", "Maxtor 91190D7", "Maxtor 91020D6", "Maxtor 90845D5", "Maxtor 90680D4", "Maxtor 90510D3", "Maxtor 90340D2",
 120         "Maxtor 91152D8", "Maxtor 91008D7", "Maxtor 90845D6", "Maxtor 90840D6", "Maxtor 90720D5", "Maxtor 90648D5", "Maxtor 90576D4",
 121         "Maxtor 90510D4",
 122         "Maxtor 90432D3", "Maxtor 90288D2", "Maxtor 90256D2",
 123         "Maxtor 91000D8", "Maxtor 90910D8", "Maxtor 90875D7", "Maxtor 90840D7", "Maxtor 90750D6", "Maxtor 90625D5", "Maxtor 90500D4",
 124         "Maxtor 91728D8", "Maxtor 91512D7", "Maxtor 91303D6", "Maxtor 91080D5", "Maxtor 90845D4", "Maxtor 90680D4", "Maxtor 90648D3", "Maxtor 90432D2",
 125         NULL
 126 };
 127
 128 static const char *bad_ata66_4[] = {
 129         "IBM-DTLA-307075",
 130         "IBM-DTLA-307060",
 131         "IBM-DTLA-307045",
 132         "IBM-DTLA-307030",
 133         "IBM-DTLA-307020",
 134         "IBM-DTLA-307015",
 135         "IBM-DTLA-305040",
 136         "IBM-DTLA-305030",
 137         "IBM-DTLA-305020",
 138         "IC35L010AVER07-0",
 139         "IC35L020AVER07-0",
 140         "IC35L030AVER07-0",
 141         "IC35L040AVER07-0",
 142         "IC35L060AVER07-0",
 143         "WDC AC310200R",
 144         NULL
 145 };
 146
 147 static const char *bad_ata66_3[] = {
 148         "WDC AC310200R",
 149         NULL
 150 };
 151
 152 static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr, const char *list[])
 153 {
 154         unsigned char model_num[40];
 155         char *s;
 156         unsigned int len;
 157         int i = 0;
 158
 159         ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS, sizeof(model_num));
 160         s = &model_num[0];
 161         len = strnlen(s, sizeof(model_num));
 162
 163         /* ATAPI specifies that empty space is blank-filled; remove blanks */
 164         while ((len > 0) && (s[len - 1] == ' ')) {
 165                 len--;
 166                 s[len] = 0;
 167         }
 168
 169         while(list[i] != NULL) {
 170                 if (!strncmp(list[i], s, len)) {
 171                         printk(KERN_WARNING DRV_NAME ": %s is not supported for %s.\n",
 172                                 modestr, list[i]);
 173                         return 1;
 174                 }
 175                 i++;
 176         }
 177         return 0;
 178 }
 179
 180 /**
 181  *      hpt366_filter   -       mode selection filter
 182  *      @ap: ATA interface
 183  *      @adev: ATA device
 184  *
 185  *      Block UDMA on devices that cause trouble with this controller.
 186  */
 187
 188 static unsigned long hpt366_filter(const struct ata_port *ap, struct ata_device *adev, unsigned long mask)
 189 {
 190         if (adev->class == ATA_DEV_ATA) {
 191                 if (hpt_dma_blacklisted(adev, "UDMA",  bad_ata33))
 192                         mask &= ~ATA_MASK_UDMA;
 193                 if (hpt_dma_blacklisted(adev, "UDMA3", bad_ata66_3))
 194                         mask &= ~(0x07 << ATA_SHIFT_UDMA);
 195                 if (hpt_dma_blacklisted(adev, "UDMA4", bad_ata66_4))
 196                         mask &= ~(0x0F << ATA_SHIFT_UDMA);
 197         }
 198         return ata_pci_default_filter(ap, adev, mask);
 199 }
 200
 201 /**
 202  *      hpt36x_find_mode        -       reset the hpt36x bus
 203  *      @ap: ATA port
 204  *      @speed: transfer mode
 205  *
 206  *      Return the 32bit register programming information for this channel
 207  *      that matches the speed provided.
 208  */
 209
 210 static u32 hpt36x_find_mode(struct ata_port *ap, int speed)
 211 {
 212         struct hpt_clock *clocks = ap->host->private_data;
 213
 214         while(clocks->xfer_speed) {
 215                 if (clocks->xfer_speed == speed)
 216                         return clocks->timing;
 217                 clocks++;
 218         }
 219         BUG();
 220         return 0xffffffffU;     /* silence compiler warning */
 221 }
 222
 223 static int hpt36x_pre_reset(struct ata_port *ap)
 224 {
 225         static const struct pci_bits hpt36x_enable_bits[] = {
 226                 { 0x50, 1, 0x04, 0x04 },
 227                 { 0x54, 1, 0x04, 0x04 }
 228         };
 229
 230         u8 ata66;
 231         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 232
 233         if (!pci_test_config_bits(pdev, &hpt36x_enable_bits[ap->port_no]))
 234                 return -ENOENT;
 235
 236         pci_read_config_byte(pdev, 0x5A, &ata66);
 237         if (ata66 & (1 << ap->port_no))
 238                 ap->cbl = ATA_CBL_PATA40;
 239         else
 240                 ap->cbl = ATA_CBL_PATA80;
 241         return ata_std_prereset(ap);
 242 }
 243
 244 /**
 245  *      hpt36x_error_handler    -       reset the hpt36x bus
 246  *      @ap: ATA port to reset
 247  *
 248  *      Perform the reset handling for the 366/368
 249  */
 250
 251 static void hpt36x_error_handler(struct ata_port *ap)
 252 {
 253         ata_bmdma_drive_eh(ap, hpt36x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
 254 }
 255
 256 /**
 257  *      hpt366_set_piomode              -       PIO setup
 258  *      @ap: ATA interface
 259  *      @adev: device on the interface
 260  *
 261  *      Perform PIO mode setup.
 262  */
 263
 264 static void hpt366_set_piomode(struct ata_port *ap, struct ata_device *adev)
 265 {
 266         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 267         u32 addr1, addr2;
 268         u32 reg;
 269         u32 mode;
 270         u8 fast;
 271
 272         addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
 273         addr2 = 0x51 + 4 * ap->port_no;
 274
 275         /* Fast interrupt prediction disable, hold off interrupt disable */
 276         pci_read_config_byte(pdev, addr2, &fast);
 277         if (fast & 0x80) {
 278                 fast &= ~0x80;
 279                 pci_write_config_byte(pdev, addr2, fast);
 280         }
 281
 282         pci_read_config_dword(pdev, addr1, &reg);
 283         mode = hpt36x_find_mode(ap, adev->pio_mode);
 284         mode &= ~0x8000000;     /* No FIFO in PIO */
 285         mode &= ~0x30070000;    /* Leave config bits alone */
 286         reg &= 0x30070000;      /* Strip timing bits */
 287         pci_write_config_dword(pdev, addr1, reg | mode);
 288 }
 289
 290 /**
 291  *      hpt366_set_dmamode              -       DMA timing setup
 292  *      @ap: ATA interface
 293  *      @adev: Device being configured
 294  *
 295  *      Set up the channel for MWDMA or UDMA modes. Much the same as with
 296  *      PIO, load the mode number and then set MWDMA or UDMA flag.
 297  */
 298
 299 static void hpt366_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 300 {
 301         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 302         u32 addr1, addr2;
 303         u32 reg;
 304         u32 mode;
 305         u8 fast;
 306
 307         addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
 308         addr2 = 0x51 + 4 * ap->port_no;
 309
 310         /* Fast interrupt prediction disable, hold off interrupt disable */
 311         pci_read_config_byte(pdev, addr2, &fast);
 312         if (fast & 0x80) {
 313                 fast &= ~0x80;
 314                 pci_write_config_byte(pdev, addr2, fast);
 315         }
 316
 317         pci_read_config_dword(pdev, addr1, &reg);
 318         mode = hpt36x_find_mode(ap, adev->dma_mode);
 319         mode |= 0x8000000;      /* FIFO in MWDMA or UDMA */
 320         mode &= ~0xC0000000;    /* Leave config bits alone */
 321         reg &= 0xC0000000;      /* Strip timing bits */
 322         pci_write_config_dword(pdev, addr1, reg | mode);
 323 }
 324
 325 static struct scsi_host_template hpt36x_sht = {
 326         .module                 = THIS_MODULE,
 327         .name                   = DRV_NAME,
 328         .ioctl                  = ata_scsi_ioctl,
 329         .queuecommand           = ata_scsi_queuecmd,
 330         .can_queue              = ATA_DEF_QUEUE,
 331         .this_id                = ATA_SHT_THIS_ID,
 332         .sg_tablesize           = LIBATA_MAX_PRD,
 333         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 334         .emulated               = ATA_SHT_EMULATED,
 335         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 336         .proc_name              = DRV_NAME,
 337         .dma_boundary           = ATA_DMA_BOUNDARY,
 338         .slave_configure        = ata_scsi_slave_config,
 339         .slave_destroy          = ata_scsi_slave_destroy,
 340         .bios_param             = ata_std_bios_param,
 341         .resume                 = ata_scsi_device_resume,
 342         .suspend                = ata_scsi_device_suspend,
 343 };
 344
 345 /*
 346  *      Configuration for HPT366/68
 347  */
 348
 349 static struct ata_port_operations hpt366_port_ops = {
 350         .port_disable   = ata_port_disable,
 351         .set_piomode    = hpt366_set_piomode,
 352         .set_dmamode    = hpt366_set_dmamode,
 353         .mode_filter    = hpt366_filter,
 354
 355         .tf_load        = ata_tf_load,
 356         .tf_read        = ata_tf_read,
 357         .check_status   = ata_check_status,
 358         .exec_command   = ata_exec_command,
 359         .dev_select     = ata_std_dev_select,
 360
 361         .freeze         = ata_bmdma_freeze,
 362         .thaw           = ata_bmdma_thaw,
 363         .error_handler  = hpt36x_error_handler,
 364         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 365
 366         .bmdma_setup    = ata_bmdma_setup,
 367         .bmdma_start    = ata_bmdma_start,
 368         .bmdma_stop     = ata_bmdma_stop,
 369         .bmdma_status   = ata_bmdma_status,
 370
 371         .qc_prep        = ata_qc_prep,
 372         .qc_issue       = ata_qc_issue_prot,
 373
 374         .data_xfer      = ata_pio_data_xfer,
 375
 376         .irq_handler    = ata_interrupt,
 377         .irq_clear      = ata_bmdma_irq_clear,
 378
 379         .port_start     = ata_port_start,
 380         .port_stop      = ata_port_stop,
 381         .host_stop      = ata_host_stop
 382 };
 383
 384 /**
 385  *      hpt36x_init_chipset     -       common chip setup
 386  *      @dev: PCI device
 387  *
 388  *      Perform the chip setup work that must be done at both init and
 389  *      resume time
 390  */
 391
 392 static void hpt36x_init_chipset(struct pci_dev *dev)
 393 {
 394         u8 drive_fast;
 395         pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
 396         pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
 397         pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
 398         pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
 399
 400         pci_read_config_byte(dev, 0x51, &drive_fast);
 401         if (drive_fast & 0x80)
 402                 pci_write_config_byte(dev, 0x51, drive_fast & ~0x80);
 403 }
 404
 405 /**
 406  *      hpt36x_init_one         -       Initialise an HPT366/368
 407  *      @dev: PCI device
 408  *      @id: Entry in match table
 409  *
 410  *      Initialise an HPT36x device. There are some interesting complications
 411  *      here. Firstly the chip may report 366 and be one of several variants.
 412  *      Secondly all the timings depend on the clock for the chip which we must
 413  *      detect and look up
 414  *
 415  *      This is the known chip mappings. It may be missing a couple of later
 416  *      releases.
 417  *
 418  *      Chip version            PCI             Rev     Notes
 419  *      HPT366                  4 (HPT366)      0       UDMA66
 420  *      HPT366                  4 (HPT366)      1       UDMA66
 421  *      HPT368                  4 (HPT366)      2       UDMA66
 422  *      HPT37x/30x              4 (HPT366)      3+      Other driver
 423  *
 424  */
 425
 426 static int hpt36x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 427 {
 428         static struct ata_port_info info_hpt366 = {
 429                 .sht = &hpt36x_sht,
 430                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 431                 .pio_mask = 0x1f,
 432                 .mwdma_mask = 0x07,
 433                 .udma_mask = 0x1f,
 434                 .port_ops = &hpt366_port_ops
 435         };
 436         struct ata_port_info *port_info[2] = {&info_hpt366, &info_hpt366};
 437
 438         u32 class_rev;
 439         u32 reg1;
 440
 441         pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
 442         class_rev &= 0xFF;
 443
 444         /* May be a later chip in disguise. Check */
 445         /* Newer chips are not in the HPT36x driver. Ignore them */
 446         if (class_rev > 2)
 447                         return -ENODEV;
 448
 449         hpt36x_init_chipset(dev);
 450
 451         pci_read_config_dword(dev, 0x40,  &reg1);
 452
 453         /* PCI clocking determines the ATA timing values to use */
 454         /* info_hpt366 is safe against re-entry so we can scribble on it */
 455         switch((reg1 & 0x700) >> 8) {
 456                 case 5:
 457                         info_hpt366.private_data = &hpt366_40;
 458                         break;
 459                 case 9:
 460                         info_hpt366.private_data = &hpt366_25;
 461                         break;
 462                 default:
 463                         info_hpt366.private_data = &hpt366_33;
 464                         break;
 465         }
 466         /* Now kick off ATA set up */
 467         return ata_pci_init_one(dev, port_info, 2);
 468 }
 469
 470 static int hpt36x_reinit_one(struct pci_dev *dev)
 471 {
 472         hpt36x_init_chipset(dev);
 473         return ata_pci_device_resume(dev);
 474 }
 475
 476
 477 static const struct pci_device_id hpt36x[] = {
 478         { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
 479         { },
 480 };
 481
 482 static struct pci_driver hpt36x_pci_driver = {
 483         .name           = DRV_NAME,
 484         .id_table       = hpt36x,
 485         .probe          = hpt36x_init_one,
 486         .remove         = ata_pci_remove_one,
 487         .suspend        = ata_pci_device_suspend,
 488         .resume         = hpt36x_reinit_one,
 489 };
 490
 491 static int __init hpt36x_init(void)
 492 {
 493         return pci_register_driver(&hpt36x_pci_driver);
 494 }
 495
 496 static void __exit hpt36x_exit(void)
 497 {
 498         pci_unregister_driver(&hpt36x_pci_driver);
 499 }
 500
 501 MODULE_AUTHOR("Alan Cox");
 502 MODULE_DESCRIPTION("low-level driver for the Highpoint HPT366/368");
 503 MODULE_LICENSE("GPL");
 504 MODULE_DEVICE_TABLE(pci, hpt36x);
 505 MODULE_VERSION(DRV_VERSION);
 506
 507 module_init(hpt36x_init);
 508 module_exit(hpt36x_exit);