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     "0.6.2"
  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[ATA_ID_PROD_LEN + 1];
 155         int i = 0;
 156
 157         ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
 158
 159         while (list[i] != NULL) {
 160                 if (!strcmp(list[i], model_num)) {
 161                         printk(KERN_WARNING DRV_NAME ": %s is not supported for %s.\n",
 162                                 modestr, list[i]);
 163                         return 1;
 164                 }
 165                 i++;
 166         }
 167         return 0;
 168 }
 169
 170 /**
 171  *      hpt366_filter   -       mode selection filter
 172  *      @adev: ATA device
 173  *
 174  *      Block UDMA on devices that cause trouble with this controller.
 175  */
 176
 177 static unsigned long hpt366_filter(struct ata_device *adev, unsigned long mask)
 178 {
 179         if (adev->class == ATA_DEV_ATA) {
 180                 if (hpt_dma_blacklisted(adev, "UDMA",  bad_ata33))
 181                         mask &= ~ATA_MASK_UDMA;
 182                 if (hpt_dma_blacklisted(adev, "UDMA3", bad_ata66_3))
 183                         mask &= ~(0xF8 << ATA_SHIFT_UDMA);
 184                 if (hpt_dma_blacklisted(adev, "UDMA4", bad_ata66_4))
 185                         mask &= ~(0xF0 << ATA_SHIFT_UDMA);
 186         }
 187         return ata_bmdma_mode_filter(adev, mask);
 188 }
 189
 190 /**
 191  *      hpt36x_find_mode        -       reset the hpt36x bus
 192  *      @ap: ATA port
 193  *      @speed: transfer mode
 194  *
 195  *      Return the 32bit register programming information for this channel
 196  *      that matches the speed provided.
 197  */
 198
 199 static u32 hpt36x_find_mode(struct ata_port *ap, int speed)
 200 {
 201         struct hpt_clock *clocks = ap->host->private_data;
 202
 203         while(clocks->xfer_speed) {
 204                 if (clocks->xfer_speed == speed)
 205                         return clocks->timing;
 206                 clocks++;
 207         }
 208         BUG();
 209         return 0xffffffffU;     /* silence compiler warning */
 210 }
 211
 212 static int hpt36x_cable_detect(struct ata_port *ap)
 213 {
 214         u8 ata66;
 215         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 216
 217         pci_read_config_byte(pdev, 0x5A, &ata66);
 218         if (ata66 & (1 << ap->port_no))
 219                 return ATA_CBL_PATA40;
 220         return ATA_CBL_PATA80;
 221 }
 222
 223 /**
 224  *      hpt366_set_piomode              -       PIO setup
 225  *      @ap: ATA interface
 226  *      @adev: device on the interface
 227  *
 228  *      Perform PIO mode setup.
 229  */
 230
 231 static void hpt366_set_piomode(struct ata_port *ap, struct ata_device *adev)
 232 {
 233         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 234         u32 addr1, addr2;
 235         u32 reg;
 236         u32 mode;
 237         u8 fast;
 238
 239         addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
 240         addr2 = 0x51 + 4 * ap->port_no;
 241
 242         /* Fast interrupt prediction disable, hold off interrupt disable */
 243         pci_read_config_byte(pdev, addr2, &fast);
 244         if (fast & 0x80) {
 245                 fast &= ~0x80;
 246                 pci_write_config_byte(pdev, addr2, fast);
 247         }
 248
 249         pci_read_config_dword(pdev, addr1, &reg);
 250         mode = hpt36x_find_mode(ap, adev->pio_mode);
 251         mode &= ~0x8000000;     /* No FIFO in PIO */
 252         mode &= ~0x30070000;    /* Leave config bits alone */
 253         reg &= 0x30070000;      /* Strip timing bits */
 254         pci_write_config_dword(pdev, addr1, reg | mode);
 255 }
 256
 257 /**
 258  *      hpt366_set_dmamode              -       DMA timing setup
 259  *      @ap: ATA interface
 260  *      @adev: Device being configured
 261  *
 262  *      Set up the channel for MWDMA or UDMA modes. Much the same as with
 263  *      PIO, load the mode number and then set MWDMA or UDMA flag.
 264  */
 265
 266 static void hpt366_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 267 {
 268         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 269         u32 addr1, addr2;
 270         u32 reg;
 271         u32 mode;
 272         u8 fast;
 273
 274         addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
 275         addr2 = 0x51 + 4 * ap->port_no;
 276
 277         /* Fast interrupt prediction disable, hold off interrupt disable */
 278         pci_read_config_byte(pdev, addr2, &fast);
 279         if (fast & 0x80) {
 280                 fast &= ~0x80;
 281                 pci_write_config_byte(pdev, addr2, fast);
 282         }
 283
 284         pci_read_config_dword(pdev, addr1, &reg);
 285         mode = hpt36x_find_mode(ap, adev->dma_mode);
 286         mode |= 0x8000000;      /* FIFO in MWDMA or UDMA */
 287         mode &= ~0xC0000000;    /* Leave config bits alone */
 288         reg &= 0xC0000000;      /* Strip timing bits */
 289         pci_write_config_dword(pdev, addr1, reg | mode);
 290 }
 291
 292 static struct scsi_host_template hpt36x_sht = {
 293         ATA_BMDMA_SHT(DRV_NAME),
 294 };
 295
 296 /*
 297  *      Configuration for HPT366/68
 298  */
 299
 300 static struct ata_port_operations hpt366_port_ops = {
 301         .inherits       = &ata_bmdma_port_ops,
 302         .cable_detect   = hpt36x_cable_detect,
 303         .mode_filter    = hpt366_filter,
 304         .set_piomode    = hpt366_set_piomode,
 305         .set_dmamode    = hpt366_set_dmamode,
 306 };
 307
 308 /**
 309  *      hpt36x_init_chipset     -       common chip setup
 310  *      @dev: PCI device
 311  *
 312  *      Perform the chip setup work that must be done at both init and
 313  *      resume time
 314  */
 315
 316 static void hpt36x_init_chipset(struct pci_dev *dev)
 317 {
 318         u8 drive_fast;
 319         pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
 320         pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
 321         pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
 322         pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
 323
 324         pci_read_config_byte(dev, 0x51, &drive_fast);
 325         if (drive_fast & 0x80)
 326                 pci_write_config_byte(dev, 0x51, drive_fast & ~0x80);
 327 }
 328
 329 /**
 330  *      hpt36x_init_one         -       Initialise an HPT366/368
 331  *      @dev: PCI device
 332  *      @id: Entry in match table
 333  *
 334  *      Initialise an HPT36x device. There are some interesting complications
 335  *      here. Firstly the chip may report 366 and be one of several variants.
 336  *      Secondly all the timings depend on the clock for the chip which we must
 337  *      detect and look up
 338  *
 339  *      This is the known chip mappings. It may be missing a couple of later
 340  *      releases.
 341  *
 342  *      Chip version            PCI             Rev     Notes
 343  *      HPT366                  4 (HPT366)      0       UDMA66
 344  *      HPT366                  4 (HPT366)      1       UDMA66
 345  *      HPT368                  4 (HPT366)      2       UDMA66
 346  *      HPT37x/30x              4 (HPT366)      3+      Other driver
 347  *
 348  */
 349
 350 static int hpt36x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 351 {
 352         static const struct ata_port_info info_hpt366 = {
 353                 .flags = ATA_FLAG_SLAVE_POSS,
 354                 .pio_mask = 0x1f,
 355                 .mwdma_mask = 0x07,
 356                 .udma_mask = ATA_UDMA4,
 357                 .port_ops = &hpt366_port_ops
 358         };
 359         const struct ata_port_info *ppi[] = { &info_hpt366, NULL };
 360
 361         void *hpriv = NULL;
 362         u32 class_rev;
 363         u32 reg1;
 364         int rc;
 365
 366         rc = pcim_enable_device(dev);
 367         if (rc)
 368                 return rc;
 369
 370         pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
 371         class_rev &= 0xFF;
 372
 373         /* May be a later chip in disguise. Check */
 374         /* Newer chips are not in the HPT36x driver. Ignore them */
 375         if (class_rev > 2)
 376                         return -ENODEV;
 377
 378         hpt36x_init_chipset(dev);
 379
 380         pci_read_config_dword(dev, 0x40,  &reg1);
 381
 382         /* PCI clocking determines the ATA timing values to use */
 383         /* info_hpt366 is safe against re-entry so we can scribble on it */
 384         switch((reg1 & 0x700) >> 8) {
 385                 case 5:
 386                         hpriv = &hpt366_40;
 387                         break;
 388                 case 9:
 389                         hpriv = &hpt366_25;
 390                         break;
 391                 default:
 392                         hpriv = &hpt366_33;
 393                         break;
 394         }
 395         /* Now kick off ATA set up */
 396         return ata_pci_sff_init_one(dev, ppi, &hpt36x_sht, hpriv);
 397 }
 398
 399 #ifdef CONFIG_PM
 400 static int hpt36x_reinit_one(struct pci_dev *dev)
 401 {
 402         struct ata_host *host = dev_get_drvdata(&dev->dev);
 403         int rc;
 404
 405         rc = ata_pci_device_do_resume(dev);
 406         if (rc)
 407                 return rc;
 408         hpt36x_init_chipset(dev);
 409         ata_host_resume(host);
 410         return 0;
 411 }
 412 #endif
 413
 414 static const struct pci_device_id hpt36x[] = {
 415         { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
 416         { },
 417 };
 418
 419 static struct pci_driver hpt36x_pci_driver = {
 420         .name           = DRV_NAME,
 421         .id_table       = hpt36x,
 422         .probe          = hpt36x_init_one,
 423         .remove         = ata_pci_remove_one,
 424 #ifdef CONFIG_PM
 425         .suspend        = ata_pci_device_suspend,
 426         .resume         = hpt36x_reinit_one,
 427 #endif
 428 };
 429
 430 static int __init hpt36x_init(void)
 431 {
 432         return pci_register_driver(&hpt36x_pci_driver);
 433 }
 434
 435 static void __exit hpt36x_exit(void)
 436 {
 437         pci_unregister_driver(&hpt36x_pci_driver);
 438 }
 439
 440 MODULE_AUTHOR("Alan Cox");
 441 MODULE_DESCRIPTION("low-level driver for the Highpoint HPT366/368");
 442 MODULE_LICENSE("GPL");
 443 MODULE_DEVICE_TABLE(pci, hpt36x);
 444 MODULE_VERSION(DRV_VERSION);
 445
 446 module_init(hpt36x_init);
 447 module_exit(hpt36x_exit);