drivers/ata/pata_atp867x.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * pata_atp867x.c - ARTOP 867X 64bit 4-channel UDMA133 ATA controller driver
   4  *
   5  *      (C) 2009 Google Inc. John(Jung-Ik) Lee <jilee@google.com>
   6  *
   7  * Per Atp867 data sheet rev 1.2, Acard.
   8  * Based in part on early ide code from
   9  *      2003-2004 by Eric Uhrhane, Google, Inc.
  10  *
  11  * TODO:
  12  *   1. RAID features [comparison, XOR, striping, mirroring, etc.]
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/module.h>
  17 #include <linux/pci.h>
  18 #include <linux/blkdev.h>
  19 #include <linux/delay.h>
  20 #include <linux/device.h>
  21 #include <linux/gfp.h>
  22 #include <scsi/scsi_host.h>
  23 #include <linux/libata.h>
  24
  25 #define DRV_NAME        "pata_atp867x"
  26 #define DRV_VERSION     "0.7.5"
  27
  28 /*
  29  * IO Registers
  30  * Note that all runtime hot priv ports are cached in ap private_data
  31  */
  32
  33 enum {
  34         ATP867X_IO_CHANNEL_OFFSET       = 0x10,
  35
  36         /*
  37          * IO Register Bitfields
  38          */
  39
  40         ATP867X_IO_PIOSPD_ACTIVE_SHIFT  = 4,
  41         ATP867X_IO_PIOSPD_RECOVER_SHIFT = 0,
  42
  43         ATP867X_IO_DMAMODE_MSTR_SHIFT   = 0,
  44         ATP867X_IO_DMAMODE_MSTR_MASK    = 0x07,
  45         ATP867X_IO_DMAMODE_SLAVE_SHIFT  = 4,
  46         ATP867X_IO_DMAMODE_SLAVE_MASK   = 0x70,
  47
  48         ATP867X_IO_DMAMODE_UDMA_6       = 0x07,
  49         ATP867X_IO_DMAMODE_UDMA_5       = 0x06,
  50         ATP867X_IO_DMAMODE_UDMA_4       = 0x05,
  51         ATP867X_IO_DMAMODE_UDMA_3       = 0x04,
  52         ATP867X_IO_DMAMODE_UDMA_2       = 0x03,
  53         ATP867X_IO_DMAMODE_UDMA_1       = 0x02,
  54         ATP867X_IO_DMAMODE_UDMA_0       = 0x01,
  55         ATP867X_IO_DMAMODE_DISABLE      = 0x00,
  56
  57         ATP867X_IO_SYS_INFO_66MHZ       = 0x04,
  58         ATP867X_IO_SYS_INFO_SLOW_UDMA5  = 0x02,
  59         ATP867X_IO_SYS_MASK_RESERVED    = (~0xf1),
  60
  61         ATP867X_IO_PORTSPD_VAL          = 0x1143,
  62         ATP867X_PREREAD_VAL             = 0x0200,
  63
  64         ATP867X_NUM_PORTS               = 4,
  65         ATP867X_BAR_IOBASE              = 0,
  66         ATP867X_BAR_ROMBASE             = 6,
  67 };
  68
  69 #define ATP867X_IOBASE(ap)              ((ap)->host->iomap[0])
  70 #define ATP867X_SYS_INFO(ap)            (0x3F + ATP867X_IOBASE(ap))
  71
  72 #define ATP867X_IO_PORTBASE(ap, port)   (0x00 + ATP867X_IOBASE(ap) + \
  73                                         (port) * ATP867X_IO_CHANNEL_OFFSET)
  74 #define ATP867X_IO_DMABASE(ap, port)    (0x40 + \
  75                                         ATP867X_IO_PORTBASE((ap), (port)))
  76
  77 #define ATP867X_IO_STATUS(ap, port)     (0x07 + \
  78                                         ATP867X_IO_PORTBASE((ap), (port)))
  79 #define ATP867X_IO_ALTSTATUS(ap, port)  (0x0E + \
  80                                         ATP867X_IO_PORTBASE((ap), (port)))
  81
  82 /*
  83  * hot priv ports
  84  */
  85 #define ATP867X_IO_MSTRPIOSPD(ap, port) (0x08 + \
  86                                         ATP867X_IO_DMABASE((ap), (port)))
  87 #define ATP867X_IO_SLAVPIOSPD(ap, port) (0x09 + \
  88                                         ATP867X_IO_DMABASE((ap), (port)))
  89 #define ATP867X_IO_8BPIOSPD(ap, port)   (0x0A + \
  90                                         ATP867X_IO_DMABASE((ap), (port)))
  91 #define ATP867X_IO_DMAMODE(ap, port)    (0x0B + \
  92                                         ATP867X_IO_DMABASE((ap), (port)))
  93
  94 #define ATP867X_IO_PORTSPD(ap, port)    (0x4A + \
  95                                         ATP867X_IO_PORTBASE((ap), (port)))
  96 #define ATP867X_IO_PREREAD(ap, port)    (0x4C + \
  97                                         ATP867X_IO_PORTBASE((ap), (port)))
  98
  99 struct atp867x_priv {
 100         void __iomem *dma_mode;
 101         void __iomem *mstr_piospd;
 102         void __iomem *slave_piospd;
 103         void __iomem *eightb_piospd;
 104         int             pci66mhz;
 105 };
 106
 107 static void atp867x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 108 {
 109         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 110         struct atp867x_priv *dp = ap->private_data;
 111         u8 speed = adev->dma_mode;
 112         u8 b;
 113         u8 mode = speed - XFER_UDMA_0 + 1;
 114
 115         /*
 116          * Doc 6.6.9: decrease the udma mode value by 1 for safer UDMA speed
 117          * on 66MHz bus
 118          *   rev-A: UDMA_1~4 (5, 6 no change)
 119          *   rev-B: all UDMA modes
 120          *   UDMA_0 stays not to disable UDMA
 121          */
 122         if (dp->pci66mhz && mode > ATP867X_IO_DMAMODE_UDMA_0  &&
 123            (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B ||
 124             mode < ATP867X_IO_DMAMODE_UDMA_5))
 125                 mode--;
 126
 127         b = ioread8(dp->dma_mode);
 128         if (adev->devno & 1) {
 129                 b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK) |
 130                         (mode << ATP867X_IO_DMAMODE_SLAVE_SHIFT);
 131         } else {
 132                 b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK) |
 133                         (mode << ATP867X_IO_DMAMODE_MSTR_SHIFT);
 134         }
 135         iowrite8(b, dp->dma_mode);
 136 }
 137
 138 static int atp867x_get_active_clocks_shifted(struct ata_port *ap,
 139         unsigned int clk)
 140 {
 141         struct atp867x_priv *dp = ap->private_data;
 142         unsigned char clocks = clk;
 143
 144         /*
 145          * Doc 6.6.9: increase the clock value by 1 for safer PIO speed
 146          * on 66MHz bus
 147          */
 148         if (dp->pci66mhz)
 149                 clocks++;
 150
 151         switch (clocks) {
 152         case 0:
 153                 clocks = 1;
 154                 break;
 155         case 1 ... 6:
 156                 break;
 157         default:
 158                 printk(KERN_WARNING "ATP867X: active %dclk is invalid. "
 159                         "Using 12clk.\n", clk);
 160                 fallthrough;
 161         case 9 ... 12:
 162                 clocks = 7;     /* 12 clk */
 163                 break;
 164         case 7:
 165         case 8: /* default 8 clk */
 166                 clocks = 0;
 167                 goto active_clock_shift_done;
 168         }
 169
 170 active_clock_shift_done:
 171         return clocks << ATP867X_IO_PIOSPD_ACTIVE_SHIFT;
 172 }
 173
 174 static int atp867x_get_recover_clocks_shifted(unsigned int clk)
 175 {
 176         unsigned char clocks = clk;
 177
 178         switch (clocks) {
 179         case 0:
 180                 clocks = 1;
 181                 break;
 182         case 1 ... 11:
 183                 break;
 184         case 13:
 185         case 14:
 186                 --clocks;       /* by the spec */
 187                 break;
 188         case 15:
 189                 break;
 190         default:
 191                 printk(KERN_WARNING "ATP867X: recover %dclk is invalid. "
 192                         "Using default 12clk.\n", clk);
 193                 fallthrough;
 194         case 12:        /* default 12 clk */
 195                 clocks = 0;
 196                 break;
 197         }
 198
 199         return clocks << ATP867X_IO_PIOSPD_RECOVER_SHIFT;
 200 }
 201
 202 static void atp867x_set_piomode(struct ata_port *ap, struct ata_device *adev)
 203 {
 204         struct ata_device *peer = ata_dev_pair(adev);
 205         struct atp867x_priv *dp = ap->private_data;
 206         u8 speed = adev->pio_mode;
 207         struct ata_timing t, p;
 208         int T, UT;
 209         u8 b;
 210
 211         T = 1000000000 / 33333;
 212         UT = T / 4;
 213
 214         ata_timing_compute(adev, speed, &t, T, UT);
 215         if (peer && peer->pio_mode) {
 216                 ata_timing_compute(peer, peer->pio_mode, &p, T, UT);
 217                 ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT);
 218         }
 219
 220         b = ioread8(dp->dma_mode);
 221         if (adev->devno & 1)
 222                 b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK);
 223         else
 224                 b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK);
 225         iowrite8(b, dp->dma_mode);
 226
 227         b = atp867x_get_active_clocks_shifted(ap, t.active) |
 228             atp867x_get_recover_clocks_shifted(t.recover);
 229
 230         if (adev->devno & 1)
 231                 iowrite8(b, dp->slave_piospd);
 232         else
 233                 iowrite8(b, dp->mstr_piospd);
 234
 235         b = atp867x_get_active_clocks_shifted(ap, t.act8b) |
 236             atp867x_get_recover_clocks_shifted(t.rec8b);
 237
 238         iowrite8(b, dp->eightb_piospd);
 239 }
 240
 241 static int atp867x_cable_override(struct pci_dev *pdev)
 242 {
 243         if (pdev->subsystem_vendor == PCI_VENDOR_ID_ARTOP &&
 244                 (pdev->subsystem_device == PCI_DEVICE_ID_ARTOP_ATP867A ||
 245                  pdev->subsystem_device == PCI_DEVICE_ID_ARTOP_ATP867B)) {
 246                 return 1;
 247         }
 248         return 0;
 249 }
 250
 251 static int atp867x_cable_detect(struct ata_port *ap)
 252 {
 253         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 254
 255         if (atp867x_cable_override(pdev))
 256                 return ATA_CBL_PATA40_SHORT;
 257
 258         return ATA_CBL_PATA_UNK;
 259 }
 260
 261 static struct scsi_host_template atp867x_sht = {
 262         ATA_BMDMA_SHT(DRV_NAME),
 263 };
 264
 265 static struct ata_port_operations atp867x_ops = {
 266         .inherits               = &ata_bmdma_port_ops,
 267         .cable_detect           = atp867x_cable_detect,
 268         .set_piomode            = atp867x_set_piomode,
 269         .set_dmamode            = atp867x_set_dmamode,
 270 };
 271
 272
 273 #ifdef  ATP867X_DEBUG
 274 static void atp867x_check_res(struct pci_dev *pdev)
 275 {
 276         int i;
 277         unsigned long start, len;
 278
 279         /* Check the PCI resources for this channel are enabled */
 280         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
 281                 start = pci_resource_start(pdev, i);
 282                 len   = pci_resource_len(pdev, i);
 283                 printk(KERN_DEBUG "ATP867X: resource start:len=%lx:%lx\n",
 284                         start, len);
 285         }
 286 }
 287
 288 static void atp867x_check_ports(struct ata_port *ap, int port)
 289 {
 290         struct ata_ioports *ioaddr = &ap->ioaddr;
 291         struct atp867x_priv *dp = ap->private_data;
 292
 293         printk(KERN_DEBUG "ATP867X: port[%d] addresses\n"
 294                 "  cmd_addr     =0x%llx, 0x%llx\n"
 295                 "  ctl_addr     =0x%llx, 0x%llx\n"
 296                 "  bmdma_addr   =0x%llx, 0x%llx\n"
 297                 "  data_addr    =0x%llx\n"
 298                 "  error_addr   =0x%llx\n"
 299                 "  feature_addr =0x%llx\n"
 300                 "  nsect_addr   =0x%llx\n"
 301                 "  lbal_addr    =0x%llx\n"
 302                 "  lbam_addr    =0x%llx\n"
 303                 "  lbah_addr    =0x%llx\n"
 304                 "  device_addr  =0x%llx\n"
 305                 "  status_addr  =0x%llx\n"
 306                 "  command_addr =0x%llx\n"
 307                 "  dp->dma_mode =0x%llx\n"
 308                 "  dp->mstr_piospd      =0x%llx\n"
 309                 "  dp->slave_piospd     =0x%llx\n"
 310                 "  dp->eightb_piospd    =0x%llx\n"
 311                 "  dp->pci66mhz         =0x%lx\n",
 312                 port,
 313                 (unsigned long long)ioaddr->cmd_addr,
 314                 (unsigned long long)ATP867X_IO_PORTBASE(ap, port),
 315                 (unsigned long long)ioaddr->ctl_addr,
 316                 (unsigned long long)ATP867X_IO_ALTSTATUS(ap, port),
 317                 (unsigned long long)ioaddr->bmdma_addr,
 318                 (unsigned long long)ATP867X_IO_DMABASE(ap, port),
 319                 (unsigned long long)ioaddr->data_addr,
 320                 (unsigned long long)ioaddr->error_addr,
 321                 (unsigned long long)ioaddr->feature_addr,
 322                 (unsigned long long)ioaddr->nsect_addr,
 323                 (unsigned long long)ioaddr->lbal_addr,
 324                 (unsigned long long)ioaddr->lbam_addr,
 325                 (unsigned long long)ioaddr->lbah_addr,
 326                 (unsigned long long)ioaddr->device_addr,
 327                 (unsigned long long)ioaddr->status_addr,
 328                 (unsigned long long)ioaddr->command_addr,
 329                 (unsigned long long)dp->dma_mode,
 330                 (unsigned long long)dp->mstr_piospd,
 331                 (unsigned long long)dp->slave_piospd,
 332                 (unsigned long long)dp->eightb_piospd,
 333                 (unsigned long)dp->pci66mhz);
 334 }
 335 #endif
 336
 337 static int atp867x_set_priv(struct ata_port *ap)
 338 {
 339         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 340         struct atp867x_priv *dp;
 341         int port = ap->port_no;
 342
 343         dp = ap->private_data =
 344                 devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
 345         if (dp == NULL)
 346                 return -ENOMEM;
 347
 348         dp->dma_mode     = ATP867X_IO_DMAMODE(ap, port);
 349         dp->mstr_piospd  = ATP867X_IO_MSTRPIOSPD(ap, port);
 350         dp->slave_piospd = ATP867X_IO_SLAVPIOSPD(ap, port);
 351         dp->eightb_piospd = ATP867X_IO_8BPIOSPD(ap, port);
 352
 353         dp->pci66mhz =
 354                 ioread8(ATP867X_SYS_INFO(ap)) & ATP867X_IO_SYS_INFO_66MHZ;
 355
 356         return 0;
 357 }
 358
 359 static void atp867x_fixup(struct ata_host *host)
 360 {
 361         struct pci_dev *pdev = to_pci_dev(host->dev);
 362         struct ata_port *ap = host->ports[0];
 363         int i;
 364         u8 v;
 365
 366         /*
 367          * Broken BIOS might not set latency high enough
 368          */
 369         pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &v);
 370         if (v < 0x80) {
 371                 v = 0x80;
 372                 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, v);
 373                 printk(KERN_DEBUG "ATP867X: set latency timer of device %s"
 374                         " to %d\n", pci_name(pdev), v);
 375         }
 376
 377         /*
 378          * init 8bit io ports speed(0aaarrrr) to 43h and
 379          * init udma modes of master/slave to 0/0(11h)
 380          */
 381         for (i = 0; i < ATP867X_NUM_PORTS; i++)
 382                 iowrite16(ATP867X_IO_PORTSPD_VAL, ATP867X_IO_PORTSPD(ap, i));
 383
 384         /*
 385          * init PreREAD counts
 386          */
 387         for (i = 0; i < ATP867X_NUM_PORTS; i++)
 388                 iowrite16(ATP867X_PREREAD_VAL, ATP867X_IO_PREREAD(ap, i));
 389
 390         v = ioread8(ATP867X_IOBASE(ap) + 0x28);
 391         v &= 0xcf;      /* Enable INTA#: bit4=0 means enable */
 392         v |= 0xc0;      /* Enable PCI burst, MRM & not immediate interrupts */
 393         iowrite8(v, ATP867X_IOBASE(ap) + 0x28);
 394
 395         /*
 396          * Turn off the over clocked udma5 mode, only for Rev-B
 397          */
 398         v = ioread8(ATP867X_SYS_INFO(ap));
 399         v &= ATP867X_IO_SYS_MASK_RESERVED;
 400         if (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B)
 401                 v |= ATP867X_IO_SYS_INFO_SLOW_UDMA5;
 402         iowrite8(v, ATP867X_SYS_INFO(ap));
 403 }
 404
 405 static int atp867x_ata_pci_sff_init_host(struct ata_host *host)
 406 {
 407         struct device *gdev = host->dev;
 408         struct pci_dev *pdev = to_pci_dev(gdev);
 409         unsigned int mask = 0;
 410         int i, rc;
 411
 412         /*
 413          * do not map rombase
 414          */
 415         rc = pcim_iomap_regions(pdev, 1 << ATP867X_BAR_IOBASE, DRV_NAME);
 416         if (rc == -EBUSY)
 417                 pcim_pin_device(pdev);
 418         if (rc)
 419                 return rc;
 420         host->iomap = pcim_iomap_table(pdev);
 421
 422 #ifdef  ATP867X_DEBUG
 423         atp867x_check_res(pdev);
 424
 425         for (i = 0; i < PCI_STD_NUM_BARS; i++)
 426                 printk(KERN_DEBUG "ATP867X: iomap[%d]=0x%llx\n", i,
 427                         (unsigned long long)(host->iomap[i]));
 428 #endif
 429
 430         /*
 431          * request, iomap BARs and init port addresses accordingly
 432          */
 433         for (i = 0; i < host->n_ports; i++) {
 434                 struct ata_port *ap = host->ports[i];
 435                 struct ata_ioports *ioaddr = &ap->ioaddr;
 436
 437                 ioaddr->cmd_addr = ATP867X_IO_PORTBASE(ap, i);
 438                 ioaddr->ctl_addr = ioaddr->altstatus_addr
 439                                  = ATP867X_IO_ALTSTATUS(ap, i);
 440                 ioaddr->bmdma_addr = ATP867X_IO_DMABASE(ap, i);
 441
 442                 ata_sff_std_ports(ioaddr);
 443                 rc = atp867x_set_priv(ap);
 444                 if (rc)
 445                         return rc;
 446
 447 #ifdef  ATP867X_DEBUG
 448                 atp867x_check_ports(ap, i);
 449 #endif
 450                 ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx",
 451                         (unsigned long)ioaddr->cmd_addr,
 452                         (unsigned long)ioaddr->ctl_addr);
 453                 ata_port_desc(ap, "bmdma 0x%lx",
 454                         (unsigned long)ioaddr->bmdma_addr);
 455
 456                 mask |= 1 << i;
 457         }
 458
 459         if (!mask) {
 460                 dev_err(gdev, "no available native port\n");
 461                 return -ENODEV;
 462         }
 463
 464         atp867x_fixup(host);
 465
 466         return dma_set_mask_and_coherent(&pdev->dev, ATA_DMA_MASK);
 467 }
 468
 469 static int atp867x_init_one(struct pci_dev *pdev,
 470         const struct pci_device_id *id)
 471 {
 472         static const struct ata_port_info info_867x = {
 473                 .flags          = ATA_FLAG_SLAVE_POSS,
 474                 .pio_mask       = ATA_PIO4,
 475                 .udma_mask      = ATA_UDMA6,
 476                 .port_ops       = &atp867x_ops,
 477         };
 478
 479         struct ata_host *host;
 480         const struct ata_port_info *ppi[] = { &info_867x, NULL };
 481         int rc;
 482
 483         ata_print_version_once(&pdev->dev, DRV_VERSION);
 484
 485         rc = pcim_enable_device(pdev);
 486         if (rc)
 487                 return rc;
 488
 489         printk(KERN_INFO "ATP867X: ATP867 ATA UDMA133 controller (rev %02X)",
 490                 pdev->device);
 491
 492         host = ata_host_alloc_pinfo(&pdev->dev, ppi, ATP867X_NUM_PORTS);
 493         if (!host) {
 494                 dev_err(&pdev->dev, "failed to allocate ATA host\n");
 495                 rc = -ENOMEM;
 496                 goto err_out;
 497         }
 498
 499         rc = atp867x_ata_pci_sff_init_host(host);
 500         if (rc) {
 501                 dev_err(&pdev->dev, "failed to init host\n");
 502                 goto err_out;
 503         }
 504
 505         pci_set_master(pdev);
 506
 507         rc = ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
 508                                 IRQF_SHARED, &atp867x_sht);
 509         if (rc)
 510                 dev_err(&pdev->dev, "failed to activate host\n");
 511
 512 err_out:
 513         return rc;
 514 }
 515
 516 #ifdef CONFIG_PM_SLEEP
 517 static int atp867x_reinit_one(struct pci_dev *pdev)
 518 {
 519         struct ata_host *host = pci_get_drvdata(pdev);
 520         int rc;
 521
 522         rc = ata_pci_device_do_resume(pdev);
 523         if (rc)
 524                 return rc;
 525
 526         atp867x_fixup(host);
 527
 528         ata_host_resume(host);
 529         return 0;
 530 }
 531 #endif
 532
 533 static struct pci_device_id atp867x_pci_tbl[] = {
 534         { PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867A),      0 },
 535         { PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867B),      0 },
 536         { },
 537 };
 538
 539 static struct pci_driver atp867x_driver = {
 540         .name           = DRV_NAME,
 541         .id_table       = atp867x_pci_tbl,
 542         .probe          = atp867x_init_one,
 543         .remove         = ata_pci_remove_one,
 544 #ifdef CONFIG_PM_SLEEP
 545         .suspend        = ata_pci_device_suspend,
 546         .resume         = atp867x_reinit_one,
 547 #endif
 548 };
 549
 550 module_pci_driver(atp867x_driver);
 551
 552 MODULE_AUTHOR("John(Jung-Ik) Lee, Google Inc.");
 553 MODULE_DESCRIPTION("low level driver for Artop/Acard 867x ATA controller");
 554 MODULE_LICENSE("GPL");
 555 MODULE_DEVICE_TABLE(pci, atp867x_pci_tbl);
 556 MODULE_VERSION(DRV_VERSION);