drivers/ata/pata_artop.c

   1 /*
   2  *    pata_artop.c - ARTOP ATA controller driver
   3  *
   4  *      (C) 2006 Red Hat
   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  *      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     "0.4.5"
  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 /**
  43  *      artop62x0_pre_reset     -       probe begin
  44  *      @link: link
  45  *      @deadline: deadline jiffies for the operation
  46  *
  47  *      Nothing complicated needed here.
  48  */
  49
  50 static int artop62x0_pre_reset(struct ata_link *link, unsigned long deadline)
  51 {
  52         static const struct pci_bits artop_enable_bits[] = {
  53                 { 0x4AU, 1U, 0x02UL, 0x02UL },  /* port 0 */
  54                 { 0x4AU, 1U, 0x04UL, 0x04UL },  /* port 1 */
  55         };
  56
  57         struct ata_port *ap = link->ap;
  58         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  59
  60         /* Odd numbered device ids are the units with enable bits. */
  61         if ((pdev->device & 1) &&
  62             !pci_test_config_bits(pdev, &artop_enable_bits[ap->port_no]))
  63                 return -ENOENT;
  64
  65         return ata_sff_prereset(link, deadline);
  66 }
  67
  68 /**
  69  *      artop6260_cable_detect  -       identify cable type
  70  *      @ap: Port
  71  *
  72  *      Identify the cable type for the ARTOP interface in question
  73  */
  74
  75 static int artop6260_cable_detect(struct ata_port *ap)
  76 {
  77         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  78         u8 tmp;
  79         pci_read_config_byte(pdev, 0x49, &tmp);
  80         if (tmp & (1 << ap->port_no))
  81                 return ATA_CBL_PATA40;
  82         return ATA_CBL_PATA80;
  83 }
  84
  85 /**
  86  *      artop6210_load_piomode - Load a set of PATA PIO timings
  87  *      @ap: Port whose timings we are configuring
  88  *      @adev: Device
  89  *      @pio: PIO mode
  90  *
  91  *      Set PIO mode for device, in host controller PCI config space. This
  92  *      is used both to set PIO timings in PIO mode and also to set the
  93  *      matching PIO clocking for UDMA, as well as the MWDMA timings.
  94  *
  95  *      LOCKING:
  96  *      None (inherited from caller).
  97  */
  98
  99 static void artop6210_load_piomode(struct ata_port *ap, struct ata_device *adev, unsigned int pio)
 100 {
 101         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 102         int dn = adev->devno + 2 * ap->port_no;
 103         const u16 timing[2][5] = {
 104                 { 0x0000, 0x000A, 0x0008, 0x0303, 0x0301 },
 105                 { 0x0700, 0x070A, 0x0708, 0x0403, 0x0401 }
 106
 107         };
 108         /* Load the PIO timing active/recovery bits */
 109         pci_write_config_word(pdev, 0x40 + 2 * dn, timing[clock][pio]);
 110 }
 111
 112 /**
 113  *      artop6210_set_piomode - Initialize host controller PATA PIO timings
 114  *      @ap: Port whose timings we are configuring
 115  *      @adev: Device we are configuring
 116  *
 117  *      Set PIO mode for device, in host controller PCI config space. For
 118  *      ARTOP we must also clear the UDMA bits if we are not doing UDMA. In
 119  *      the event UDMA is used the later call to set_dmamode will set the
 120  *      bits as required.
 121  *
 122  *      LOCKING:
 123  *      None (inherited from caller).
 124  */
 125
 126 static void artop6210_set_piomode(struct ata_port *ap, struct ata_device *adev)
 127 {
 128         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 129         int dn = adev->devno + 2 * ap->port_no;
 130         u8 ultra;
 131
 132         artop6210_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
 133
 134         /* Clear the UDMA mode bits (set_dmamode will redo this if needed) */
 135         pci_read_config_byte(pdev, 0x54, &ultra);
 136         ultra &= ~(3 << (2 * dn));
 137         pci_write_config_byte(pdev, 0x54, ultra);
 138 }
 139
 140 /**
 141  *      artop6260_load_piomode - Initialize host controller PATA PIO timings
 142  *      @ap: Port whose timings we are configuring
 143  *      @adev: Device we are configuring
 144  *      @pio: PIO mode
 145  *
 146  *      Set PIO mode for device, in host controller PCI config space. The
 147  *      ARTOP6260 and relatives store the timing data differently.
 148  *
 149  *      LOCKING:
 150  *      None (inherited from caller).
 151  */
 152
 153 static void artop6260_load_piomode (struct ata_port *ap, struct ata_device *adev, unsigned int pio)
 154 {
 155         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 156         int dn = adev->devno + 2 * ap->port_no;
 157         const u8 timing[2][5] = {
 158                 { 0x00, 0x0A, 0x08, 0x33, 0x31 },
 159                 { 0x70, 0x7A, 0x78, 0x43, 0x41 }
 160
 161         };
 162         /* Load the PIO timing active/recovery bits */
 163         pci_write_config_byte(pdev, 0x40 + dn, timing[clock][pio]);
 164 }
 165
 166 /**
 167  *      artop6260_set_piomode - Initialize host controller PATA PIO timings
 168  *      @ap: Port whose timings we are configuring
 169  *      @adev: Device we are configuring
 170  *
 171  *      Set PIO mode for device, in host controller PCI config space. For
 172  *      ARTOP we must also clear the UDMA bits if we are not doing UDMA. In
 173  *      the event UDMA is used the later call to set_dmamode will set the
 174  *      bits as required.
 175  *
 176  *      LOCKING:
 177  *      None (inherited from caller).
 178  */
 179
 180 static void artop6260_set_piomode(struct ata_port *ap, struct ata_device *adev)
 181 {
 182         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 183         u8 ultra;
 184
 185         artop6260_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
 186
 187         /* Clear the UDMA mode bits (set_dmamode will redo this if needed) */
 188         pci_read_config_byte(pdev, 0x44 + ap->port_no, &ultra);
 189         ultra &= ~(7 << (4  * adev->devno));    /* One nibble per drive */
 190         pci_write_config_byte(pdev, 0x44 + ap->port_no, ultra);
 191 }
 192
 193 /**
 194  *      artop6210_set_dmamode - Initialize host controller PATA PIO timings
 195  *      @ap: Port whose timings we are configuring
 196  *      @adev: Device whose timings we are configuring
 197  *
 198  *      Set DMA mode for device, in host controller PCI config space.
 199  *
 200  *      LOCKING:
 201  *      None (inherited from caller).
 202  */
 203
 204 static void artop6210_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 205 {
 206         unsigned int pio;
 207         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 208         int dn = adev->devno + 2 * ap->port_no;
 209         u8 ultra;
 210
 211         if (adev->dma_mode == XFER_MW_DMA_0)
 212                 pio = 1;
 213         else
 214                 pio = 4;
 215
 216         /* Load the PIO timing active/recovery bits */
 217         artop6210_load_piomode(ap, adev, pio);
 218
 219         pci_read_config_byte(pdev, 0x54, &ultra);
 220         ultra &= ~(3 << (2 * dn));
 221
 222         /* Add ultra DMA bits if in UDMA mode */
 223         if (adev->dma_mode >= XFER_UDMA_0) {
 224                 u8 mode = (adev->dma_mode - XFER_UDMA_0) + 1 - clock;
 225                 if (mode == 0)
 226                         mode = 1;
 227                 ultra |= (mode << (2 * dn));
 228         }
 229         pci_write_config_byte(pdev, 0x54, ultra);
 230 }
 231
 232 /**
 233  *      artop6260_set_dmamode - Initialize host controller PATA PIO timings
 234  *      @ap: Port whose timings we are configuring
 235  *      @adev: Device we are configuring
 236  *
 237  *      Set DMA mode for device, in host controller PCI config space. The
 238  *      ARTOP6260 and relatives store the timing data differently.
 239  *
 240  *      LOCKING:
 241  *      None (inherited from caller).
 242  */
 243
 244 static void artop6260_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 245 {
 246         unsigned int pio        = adev->pio_mode - XFER_PIO_0;
 247         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 248         u8 ultra;
 249
 250         if (adev->dma_mode == XFER_MW_DMA_0)
 251                 pio = 1;
 252         else
 253                 pio = 4;
 254
 255         /* Load the PIO timing active/recovery bits */
 256         artop6260_load_piomode(ap, adev, pio);
 257
 258         /* Add ultra DMA bits if in UDMA mode */
 259         pci_read_config_byte(pdev, 0x44 + ap->port_no, &ultra);
 260         ultra &= ~(7 << (4  * adev->devno));    /* One nibble per drive */
 261         if (adev->dma_mode >= XFER_UDMA_0) {
 262                 u8 mode = adev->dma_mode - XFER_UDMA_0 + 1 - clock;
 263                 if (mode == 0)
 264                         mode = 1;
 265                 ultra |= (mode << (4 * adev->devno));
 266         }
 267         pci_write_config_byte(pdev, 0x44 + ap->port_no, ultra);
 268 }
 269
 270 /**
 271  *      artop_6210_qc_defer     -       implement serialization
 272  *      @qc: command
 273  *
 274  *      Issue commands per host on this chip.
 275  */
 276
 277 static int artop6210_qc_defer(struct ata_queued_cmd *qc)
 278 {
 279         struct ata_host *host = qc->ap->host;
 280         struct ata_port *alt = host->ports[1 ^ qc->ap->port_no];
 281         int rc;
 282
 283         /* First apply the usual rules */
 284         rc = ata_std_qc_defer(qc);
 285         if (rc != 0)
 286                 return rc;
 287
 288         /* Now apply serialization rules. Only allow a command if the
 289            other channel state machine is idle */
 290         if (alt && alt->qc_active)
 291                 return  ATA_DEFER_PORT;
 292         return 0;
 293 }
 294
 295 static struct scsi_host_template artop_sht = {
 296         ATA_BMDMA_SHT(DRV_NAME),
 297 };
 298
 299 static struct ata_port_operations artop6210_ops = {
 300         .inherits               = &ata_bmdma_port_ops,
 301         .cable_detect           = ata_cable_40wire,
 302         .set_piomode            = artop6210_set_piomode,
 303         .set_dmamode            = artop6210_set_dmamode,
 304         .prereset               = artop62x0_pre_reset,
 305         .qc_defer               = artop6210_qc_defer,
 306 };
 307
 308 static struct ata_port_operations artop6260_ops = {
 309         .inherits               = &ata_bmdma_port_ops,
 310         .cable_detect           = artop6260_cable_detect,
 311         .set_piomode            = artop6260_set_piomode,
 312         .set_dmamode            = artop6260_set_dmamode,
 313         .prereset               = artop62x0_pre_reset,
 314 };
 315
 316
 317 /**
 318  *      artop_init_one - Register ARTOP ATA PCI device with kernel services
 319  *      @pdev: PCI device to register
 320  *      @ent: Entry in artop_pci_tbl matching with @pdev
 321  *
 322  *      Called from kernel PCI layer.
 323  *
 324  *      LOCKING:
 325  *      Inherited from PCI layer (may sleep).
 326  *
 327  *      RETURNS:
 328  *      Zero on success, or -ERRNO value.
 329  */
 330
 331 static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 332 {
 333         static const struct ata_port_info info_6210 = {
 334                 .flags          = ATA_FLAG_SLAVE_POSS,
 335                 .pio_mask       = ATA_PIO4,
 336                 .mwdma_mask     = ATA_MWDMA2,
 337                 .udma_mask      = ATA_UDMA2,
 338                 .port_ops       = &artop6210_ops,
 339         };
 340         static const struct ata_port_info info_626x = {
 341                 .flags          = ATA_FLAG_SLAVE_POSS,
 342                 .pio_mask       = ATA_PIO4,
 343                 .mwdma_mask     = ATA_MWDMA2,
 344                 .udma_mask      = ATA_UDMA4,
 345                 .port_ops       = &artop6260_ops,
 346         };
 347         static const struct ata_port_info info_628x = {
 348                 .flags          = ATA_FLAG_SLAVE_POSS,
 349                 .pio_mask       = ATA_PIO4,
 350                 .mwdma_mask     = ATA_MWDMA2,
 351                 .udma_mask      = ATA_UDMA5,
 352                 .port_ops       = &artop6260_ops,
 353         };
 354         static const struct ata_port_info info_628x_fast = {
 355                 .flags          = ATA_FLAG_SLAVE_POSS,
 356                 .pio_mask       = ATA_PIO4,
 357                 .mwdma_mask     = ATA_MWDMA2,
 358                 .udma_mask      = ATA_UDMA6,
 359                 .port_ops       = &artop6260_ops,
 360         };
 361         const struct ata_port_info *ppi[] = { NULL, NULL };
 362         int rc;
 363
 364         ata_print_version_once(&pdev->dev, DRV_VERSION);
 365
 366         rc = pcim_enable_device(pdev);
 367         if (rc)
 368                 return rc;
 369
 370         if (id->driver_data == 0) {     /* 6210 variant */
 371                 ppi[0] = &info_6210;
 372                 /* BIOS may have left us in UDMA, clear it before libata probe */
 373                 pci_write_config_byte(pdev, 0x54, 0);
 374         }
 375         else if (id->driver_data == 1)  /* 6260 */
 376                 ppi[0] = &info_626x;
 377         else if (id->driver_data == 2)  { /* 6280 or 6280 + fast */
 378                 unsigned long io = pci_resource_start(pdev, 4);
 379                 u8 reg;
 380
 381                 ppi[0] = &info_628x;
 382                 if (inb(io) & 0x10)
 383                         ppi[0] = &info_628x_fast;
 384                 /* Mac systems come up with some registers not set as we
 385                    will need them */
 386
 387                 /* Clear reset & test bits */
 388                 pci_read_config_byte(pdev, 0x49, &reg);
 389                 pci_write_config_byte(pdev, 0x49, reg & ~ 0x30);
 390
 391                 /* PCI latency must be > 0x80 for burst mode, tweak it
 392                  * if required.
 393                  */
 394                 pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &reg);
 395                 if (reg <= 0x80)
 396                         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x90);
 397
 398                 /* Enable IRQ output and burst mode */
 399                 pci_read_config_byte(pdev, 0x4a, &reg);
 400                 pci_write_config_byte(pdev, 0x4a, (reg & ~0x01) | 0x80);
 401
 402         }
 403
 404         BUG_ON(ppi[0] == NULL);
 405
 406         return ata_pci_bmdma_init_one(pdev, ppi, &artop_sht, NULL, 0);
 407 }
 408
 409 static const struct pci_device_id artop_pci_tbl[] = {
 410         { PCI_VDEVICE(ARTOP, 0x0005), 0 },
 411         { PCI_VDEVICE(ARTOP, 0x0006), 1 },
 412         { PCI_VDEVICE(ARTOP, 0x0007), 1 },
 413         { PCI_VDEVICE(ARTOP, 0x0008), 2 },
 414         { PCI_VDEVICE(ARTOP, 0x0009), 2 },
 415
 416         { }     /* terminate list */
 417 };
 418
 419 static struct pci_driver artop_pci_driver = {
 420         .name                   = DRV_NAME,
 421         .id_table               = artop_pci_tbl,
 422         .probe                  = artop_init_one,
 423         .remove                 = ata_pci_remove_one,
 424 };
 425
 426 static int __init artop_init(void)
 427 {
 428         return pci_register_driver(&artop_pci_driver);
 429 }
 430
 431 static void __exit artop_exit(void)
 432 {
 433         pci_unregister_driver(&artop_pci_driver);
 434 }
 435
 436 module_init(artop_init);
 437 module_exit(artop_exit);
 438
 439 MODULE_AUTHOR("Alan Cox");
 440 MODULE_DESCRIPTION("SCSI low-level driver for ARTOP PATA");
 441 MODULE_LICENSE("GPL");
 442 MODULE_DEVICE_TABLE(pci, artop_pci_tbl);
 443 MODULE_VERSION(DRV_VERSION);
 444