drivers/ata/pata_atp867x.c

   1 /*
   2  * pata_atp867x.c - ARTOP 867X 64bit 4-channel UDMA133 ATA controller driver
   3  *
   4  *      (C) 2009 Google Inc. John(Jung-Ik) Lee <jilee@google.com>
   5  *
   6  * Per Atp867 data sheet rev 1.2, Acard.
   7  * Based in part on early ide code from
   8  *      2003-2004 by Eric Uhrhane, Google, Inc.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  *
  24  *
  25  * TODO:
  26  *   1. RAID features [comparison, XOR, striping, mirroring, etc.]
  27  */
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/pci.h>
  32 #include <linux/init.h>
  33 #include <linux/blkdev.h>
  34 #include <linux/delay.h>
  35 #include <linux/device.h>
  36 #include <scsi/scsi_host.h>
  37 #include <linux/libata.h>
  38
  39 #define DRV_NAME        "pata_atp867x"
  40 #define DRV_VERSION     "0.7.5"
  41
  42 /*
  43  * IO Registers
  44  * Note that all runtime hot priv ports are cached in ap private_data
  45  */
  46
  47 enum {
  48         ATP867X_IO_CHANNEL_OFFSET       = 0x10,
  49
  50         /*
  51          * IO Register Bitfields
  52          */
  53
  54         ATP867X_IO_PIOSPD_ACTIVE_SHIFT  = 4,
  55         ATP867X_IO_PIOSPD_RECOVER_SHIFT = 0,
  56
  57         ATP867X_IO_DMAMODE_MSTR_SHIFT   = 0,
  58         ATP867X_IO_DMAMODE_MSTR_MASK    = 0x07,
  59         ATP867X_IO_DMAMODE_SLAVE_SHIFT  = 4,
  60         ATP867X_IO_DMAMODE_SLAVE_MASK   = 0x70,
  61
  62         ATP867X_IO_DMAMODE_UDMA_6       = 0x07,
  63         ATP867X_IO_DMAMODE_UDMA_5       = 0x06,
  64         ATP867X_IO_DMAMODE_UDMA_4       = 0x05,
  65         ATP867X_IO_DMAMODE_UDMA_3       = 0x04,
  66         ATP867X_IO_DMAMODE_UDMA_2       = 0x03,
  67         ATP867X_IO_DMAMODE_UDMA_1       = 0x02,
  68         ATP867X_IO_DMAMODE_UDMA_0       = 0x01,
  69         ATP867X_IO_DMAMODE_DISABLE      = 0x00,
  70
  71         ATP867X_IO_SYS_INFO_66MHZ       = 0x04,
  72         ATP867X_IO_SYS_INFO_SLOW_UDMA5  = 0x02,
  73         ATP867X_IO_SYS_MASK_RESERVED    = (~0xf1),
  74
  75         ATP867X_IO_PORTSPD_VAL          = 0x1143,
  76         ATP867X_PREREAD_VAL             = 0x0200,
  77
  78         ATP867X_NUM_PORTS               = 4,
  79         ATP867X_BAR_IOBASE              = 0,
  80         ATP867X_BAR_ROMBASE             = 6,
  81 };
  82
  83 #define ATP867X_IOBASE(ap)              ((ap)->host->iomap[0])
  84 #define ATP867X_SYS_INFO(ap)            (0x3F + ATP867X_IOBASE(ap))
  85
  86 #define ATP867X_IO_PORTBASE(ap, port)   (0x00 + ATP867X_IOBASE(ap) + \
  87                                         (port) * ATP867X_IO_CHANNEL_OFFSET)
  88 #define ATP867X_IO_DMABASE(ap, port)    (0x40 + \
  89                                         ATP867X_IO_PORTBASE((ap), (port)))
  90
  91 #define ATP867X_IO_STATUS(ap, port)     (0x07 + \
  92                                         ATP867X_IO_PORTBASE((ap), (port)))
  93 #define ATP867X_IO_ALTSTATUS(ap, port)  (0x0E + \
  94                                         ATP867X_IO_PORTBASE((ap), (port)))
  95
  96 /*
  97  * hot priv ports
  98  */
  99 #define ATP867X_IO_MSTRPIOSPD(ap, port) (0x08 + \
 100                                         ATP867X_IO_DMABASE((ap), (port)))
 101 #define ATP867X_IO_SLAVPIOSPD(ap, port) (0x09 + \
 102                                         ATP867X_IO_DMABASE((ap), (port)))
 103 #define ATP867X_IO_8BPIOSPD(ap, port)   (0x0A + \
 104                                         ATP867X_IO_DMABASE((ap), (port)))
 105 #define ATP867X_IO_DMAMODE(ap, port)    (0x0B + \
 106                                         ATP867X_IO_DMABASE((ap), (port)))
 107
 108 #define ATP867X_IO_PORTSPD(ap, port)    (0x4A + \
 109                                         ATP867X_IO_PORTBASE((ap), (port)))
 110 #define ATP867X_IO_PREREAD(ap, port)    (0x4C + \
 111                                         ATP867X_IO_PORTBASE((ap), (port)))
 112
 113 struct atp867x_priv {
 114         void __iomem *dma_mode;
 115         void __iomem *mstr_piospd;
 116         void __iomem *slave_piospd;
 117         void __iomem *eightb_piospd;
 118         int             pci66mhz;
 119 };
 120
 121 static void atp867x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 122 {
 123         struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
 124         struct atp867x_priv *dp = ap->private_data;
 125         u8 speed = adev->dma_mode;
 126         u8 b;
 127         u8 mode = speed - XFER_UDMA_0 + 1;
 128
 129         /*
 130          * Doc 6.6.9: decrease the udma mode value by 1 for safer UDMA speed
 131          * on 66MHz bus
 132          *   rev-A: UDMA_1~4 (5, 6 no change)
 133          *   rev-B: all UDMA modes
 134          *   UDMA_0 stays not to disable UDMA
 135          */
 136         if (dp->pci66mhz && mode > ATP867X_IO_DMAMODE_UDMA_0  &&
 137            (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B ||
 138             mode < ATP867X_IO_DMAMODE_UDMA_5))
 139                 mode--;
 140
 141         b = ioread8(dp->dma_mode);
 142         if (adev->devno & 1) {
 143                 b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK) |
 144                         (mode << ATP867X_IO_DMAMODE_SLAVE_SHIFT);
 145         } else {
 146                 b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK) |
 147                         (mode << ATP867X_IO_DMAMODE_MSTR_SHIFT);
 148         }
 149         iowrite8(b, dp->dma_mode);
 150 }
 151
 152 static int atp867x_get_active_clocks_shifted(struct ata_port *ap,
 153         unsigned int clk)
 154 {
 155         struct atp867x_priv *dp = ap->private_data;
 156         unsigned char clocks = clk;
 157
 158         /*
 159          * Doc 6.6.9: increase the clock value by 1 for safer PIO speed
 160          * on 66MHz bus
 161          */
 162         if (dp->pci66mhz)
 163                 clocks++;
 164
 165         switch (clocks) {
 166         case 0:
 167                 clocks = 1;
 168                 break;
 169         case 1 ... 6:
 170                 break;
 171         default:
 172                 printk(KERN_WARNING "ATP867X: active %dclk is invalid. "
 173                         "Using 12clk.\n", clk);
 174         case 9 ... 12:
 175                 clocks = 7;     /* 12 clk */
 176                 break;
 177         case 7:
 178         case 8: /* default 8 clk */
 179                 clocks = 0;
 180                 goto active_clock_shift_done;
 181         }
 182
 183 active_clock_shift_done:
 184         return clocks << ATP867X_IO_PIOSPD_ACTIVE_SHIFT;
 185 }
 186
 187 static int atp867x_get_recover_clocks_shifted(unsigned int clk)
 188 {
 189         unsigned char clocks = clk;
 190
 191         switch (clocks) {
 192         case 0:
 193                 clocks = 1;
 194                 break;
 195         case 1 ... 11:
 196                 break;
 197         case 13:
 198         case 14:
 199                 --clocks;       /* by the spec */
 200                 break;
 201         case 15:
 202                 break;
 203         default:
 204                 printk(KERN_WARNING "ATP867X: recover %dclk is invalid. "
 205                         "Using default 12clk.\n", clk);
 206         case 12:        /* default 12 clk */
 207                 clocks = 0;
 208                 break;
 209         }
 210
 211         return clocks << ATP867X_IO_PIOSPD_RECOVER_SHIFT;
 212 }
 213
 214 static void atp867x_set_piomode(struct ata_port *ap, struct ata_device *adev)
 215 {
 216         struct ata_device *peer = ata_dev_pair(adev);
 217         struct atp867x_priv *dp = ap->private_data;
 218         u8 speed = adev->pio_mode;
 219         struct ata_timing t, p;
 220         int T, UT;
 221         u8 b;
 222
 223         T = 1000000000 / 33333;
 224         UT = T / 4;
 225
 226         ata_timing_compute(adev, speed, &t, T, UT);
 227         if (peer && peer->pio_mode) {
 228                 ata_timing_compute(peer, peer->pio_mode, &p, T, UT);
 229                 ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT);
 230         }
 231
 232         b = ioread8(dp->dma_mode);
 233         if (adev->devno & 1)
 234                 b = (b & ~ATP867X_IO_DMAMODE_SLAVE_MASK);
 235         else
 236                 b = (b & ~ATP867X_IO_DMAMODE_MSTR_MASK);
 237         iowrite8(b, dp->dma_mode);
 238
 239         b = atp867x_get_active_clocks_shifted(ap, t.active) |
 240             atp867x_get_recover_clocks_shifted(t.recover);
 241
 242         if (adev->devno & 1)
 243                 iowrite8(b, dp->slave_piospd);
 244         else
 245                 iowrite8(b, dp->mstr_piospd);
 246
 247         b = atp867x_get_active_clocks_shifted(ap, t.act8b) |
 248             atp867x_get_recover_clocks_shifted(t.rec8b);
 249
 250         iowrite8(b, dp->eightb_piospd);
 251 }
 252
 253 static int atp867x_cable_override(struct pci_dev *pdev)
 254 {
 255         if (pdev->subsystem_vendor == PCI_VENDOR_ID_ARTOP &&
 256                 (pdev->subsystem_device == PCI_DEVICE_ID_ARTOP_ATP867A ||
 257                  pdev->subsystem_device == PCI_DEVICE_ID_ARTOP_ATP867B)) {
 258                 return 1;
 259         }
 260         return 0;
 261 }
 262
 263 static int atp867x_cable_detect(struct ata_port *ap)
 264 {
 265         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 266
 267         if (atp867x_cable_override(pdev))
 268                 return ATA_CBL_PATA40_SHORT;
 269
 270         return ATA_CBL_PATA_UNK;
 271 }
 272
 273 static struct scsi_host_template atp867x_sht = {
 274         ATA_BMDMA_SHT(DRV_NAME),
 275 };
 276
 277 static struct ata_port_operations atp867x_ops = {
 278         .inherits               = &ata_bmdma_port_ops,
 279         .cable_detect           = atp867x_cable_detect,
 280         .set_piomode            = atp867x_set_piomode,
 281         .set_dmamode            = atp867x_set_dmamode,
 282 };
 283
 284
 285 #ifdef  ATP867X_DEBUG
 286 static void atp867x_check_res(struct pci_dev *pdev)
 287 {
 288         int i;
 289         unsigned long start, len;
 290
 291         /* Check the PCI resources for this channel are enabled */
 292         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
 293                 start = pci_resource_start(pdev, i);
 294                 len   = pci_resource_len(pdev, i);
 295                 printk(KERN_DEBUG "ATP867X: resource start:len=%lx:%lx\n",
 296                         start, len);
 297         }
 298 }
 299
 300 static void atp867x_check_ports(struct ata_port *ap, int port)
 301 {
 302         struct ata_ioports *ioaddr = &ap->ioaddr;
 303         struct atp867x_priv *dp = ap->private_data;
 304
 305         printk(KERN_DEBUG "ATP867X: port[%d] addresses\n"
 306                 "  cmd_addr     =0x%llx, 0x%llx\n"
 307                 "  ctl_addr     =0x%llx, 0x%llx\n"
 308                 "  bmdma_addr   =0x%llx, 0x%llx\n"
 309                 "  data_addr    =0x%llx\n"
 310                 "  error_addr   =0x%llx\n"
 311                 "  feature_addr =0x%llx\n"
 312                 "  nsect_addr   =0x%llx\n"
 313                 "  lbal_addr    =0x%llx\n"
 314                 "  lbam_addr    =0x%llx\n"
 315                 "  lbah_addr    =0x%llx\n"
 316                 "  device_addr  =0x%llx\n"
 317                 "  status_addr  =0x%llx\n"
 318                 "  command_addr =0x%llx\n"
 319                 "  dp->dma_mode =0x%llx\n"
 320                 "  dp->mstr_piospd      =0x%llx\n"
 321                 "  dp->slave_piospd     =0x%llx\n"
 322                 "  dp->eightb_piospd    =0x%llx\n"
 323                 "  dp->pci66mhz         =0x%lx\n",
 324                 port,
 325                 (unsigned long long)ioaddr->cmd_addr,
 326                 (unsigned long long)ATP867X_IO_PORTBASE(ap, port),
 327                 (unsigned long long)ioaddr->ctl_addr,
 328                 (unsigned long long)ATP867X_IO_ALTSTATUS(ap, port),
 329                 (unsigned long long)ioaddr->bmdma_addr,
 330                 (unsigned long long)ATP867X_IO_DMABASE(ap, port),
 331                 (unsigned long long)ioaddr->data_addr,
 332                 (unsigned long long)ioaddr->error_addr,
 333                 (unsigned long long)ioaddr->feature_addr,
 334                 (unsigned long long)ioaddr->nsect_addr,
 335                 (unsigned long long)ioaddr->lbal_addr,
 336                 (unsigned long long)ioaddr->lbam_addr,
 337                 (unsigned long long)ioaddr->lbah_addr,
 338                 (unsigned long long)ioaddr->device_addr,
 339                 (unsigned long long)ioaddr->status_addr,
 340                 (unsigned long long)ioaddr->command_addr,
 341                 (unsigned long long)dp->dma_mode,
 342                 (unsigned long long)dp->mstr_piospd,
 343                 (unsigned long long)dp->slave_piospd,
 344                 (unsigned long long)dp->eightb_piospd,
 345                 (unsigned long)dp->pci66mhz);
 346 }
 347 #endif
 348
 349 static int atp867x_set_priv(struct ata_port *ap)
 350 {
 351         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 352         struct atp867x_priv *dp;
 353         int port = ap->port_no;
 354
 355         dp = ap->private_data =
 356                 devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
 357         if (dp == NULL)
 358                 return -ENOMEM;
 359
 360         dp->dma_mode     = ATP867X_IO_DMAMODE(ap, port);
 361         dp->mstr_piospd  = ATP867X_IO_MSTRPIOSPD(ap, port);
 362         dp->slave_piospd = ATP867X_IO_SLAVPIOSPD(ap, port);
 363         dp->eightb_piospd = ATP867X_IO_8BPIOSPD(ap, port);
 364
 365         dp->pci66mhz =
 366                 ioread8(ATP867X_SYS_INFO(ap)) & ATP867X_IO_SYS_INFO_66MHZ;
 367
 368         return 0;
 369 }
 370
 371 static void atp867x_fixup(struct ata_host *host)
 372 {
 373         struct pci_dev *pdev = to_pci_dev(host->dev);
 374         struct ata_port *ap = host->ports[0];
 375         int i;
 376         u8 v;
 377
 378         /*
 379          * Broken BIOS might not set latency high enough
 380          */
 381         pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &v);
 382         if (v < 0x80) {
 383                 v = 0x80;
 384                 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, v);
 385                 printk(KERN_DEBUG "ATP867X: set latency timer of device %s"
 386                         " to %d\n", pci_name(pdev), v);
 387         }
 388
 389         /*
 390          * init 8bit io ports speed(0aaarrrr) to 43h and
 391          * init udma modes of master/slave to 0/0(11h)
 392          */
 393         for (i = 0; i < ATP867X_NUM_PORTS; i++)
 394                 iowrite16(ATP867X_IO_PORTSPD_VAL, ATP867X_IO_PORTSPD(ap, i));
 395
 396         /*
 397          * init PreREAD counts
 398          */
 399         for (i = 0; i < ATP867X_NUM_PORTS; i++)
 400                 iowrite16(ATP867X_PREREAD_VAL, ATP867X_IO_PREREAD(ap, i));
 401
 402         v = ioread8(ATP867X_IOBASE(ap) + 0x28);
 403         v &= 0xcf;      /* Enable INTA#: bit4=0 means enable */
 404         v |= 0xc0;      /* Enable PCI burst, MRM & not immediate interrupts */
 405         iowrite8(v, ATP867X_IOBASE(ap) + 0x28);
 406
 407         /*
 408          * Turn off the over clocked udma5 mode, only for Rev-B
 409          */
 410         v = ioread8(ATP867X_SYS_INFO(ap));
 411         v &= ATP867X_IO_SYS_MASK_RESERVED;
 412         if (pdev->device == PCI_DEVICE_ID_ARTOP_ATP867B)
 413                 v |= ATP867X_IO_SYS_INFO_SLOW_UDMA5;
 414         iowrite8(v, ATP867X_SYS_INFO(ap));
 415 }
 416
 417 static int atp867x_ata_pci_sff_init_host(struct ata_host *host)
 418 {
 419         struct device *gdev = host->dev;
 420         struct pci_dev *pdev = to_pci_dev(gdev);
 421         unsigned int mask = 0;
 422         int i, rc;
 423
 424         /*
 425          * do not map rombase
 426          */
 427         rc = pcim_iomap_regions(pdev, 1 << ATP867X_BAR_IOBASE, DRV_NAME);
 428         if (rc == -EBUSY)
 429                 pcim_pin_device(pdev);
 430         if (rc)
 431                 return rc;
 432         host->iomap = pcim_iomap_table(pdev);
 433
 434 #ifdef  ATP867X_DEBUG
 435         atp867x_check_res(pdev);
 436
 437         for (i = 0; i < PCI_ROM_RESOURCE; i++)
 438                 printk(KERN_DEBUG "ATP867X: iomap[%d]=0x%llx\n", i,
 439                         (unsigned long long)(host->iomap[i]));
 440 #endif
 441
 442         /*
 443          * request, iomap BARs and init port addresses accordingly
 444          */
 445         for (i = 0; i < host->n_ports; i++) {
 446                 struct ata_port *ap = host->ports[i];
 447                 struct ata_ioports *ioaddr = &ap->ioaddr;
 448
 449                 ioaddr->cmd_addr = ATP867X_IO_PORTBASE(ap, i);
 450                 ioaddr->ctl_addr = ioaddr->altstatus_addr
 451                                  = ATP867X_IO_ALTSTATUS(ap, i);
 452                 ioaddr->bmdma_addr = ATP867X_IO_DMABASE(ap, i);
 453
 454                 ata_sff_std_ports(ioaddr);
 455                 rc = atp867x_set_priv(ap);
 456                 if (rc)
 457                         return rc;
 458
 459 #ifdef  ATP867X_DEBUG
 460                 atp867x_check_ports(ap, i);
 461 #endif
 462                 ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx",
 463                         (unsigned long)ioaddr->cmd_addr,
 464                         (unsigned long)ioaddr->ctl_addr);
 465                 ata_port_desc(ap, "bmdma 0x%lx",
 466                         (unsigned long)ioaddr->bmdma_addr);
 467
 468                 mask |= 1 << i;
 469         }
 470
 471         if (!mask) {
 472                 dev_printk(KERN_ERR, gdev, "no available native port\n");
 473                 return -ENODEV;
 474         }
 475
 476         atp867x_fixup(host);
 477
 478         rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
 479         if (rc)
 480                 return rc;
 481
 482         rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
 483         return rc;
 484 }
 485
 486 static int atp867x_init_one(struct pci_dev *pdev,
 487         const struct pci_device_id *id)
 488 {
 489         static int printed_version;
 490         static const struct ata_port_info info_867x = {
 491                 .flags          = ATA_FLAG_SLAVE_POSS,
 492                 .pio_mask       = ATA_PIO4,
 493                 .udma_mask      = ATA_UDMA6,
 494                 .port_ops       = &atp867x_ops,
 495         };
 496
 497         struct ata_host *host;
 498         const struct ata_port_info *ppi[] = { &info_867x, NULL };
 499         int rc;
 500
 501         if (!printed_version++)
 502                 dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
 503
 504         rc = pcim_enable_device(pdev);
 505         if (rc)
 506                 return rc;
 507
 508         printk(KERN_INFO "ATP867X: ATP867 ATA UDMA133 controller (rev %02X)",
 509                 pdev->device);
 510
 511         host = ata_host_alloc_pinfo(&pdev->dev, ppi, ATP867X_NUM_PORTS);
 512         if (!host) {
 513                 dev_printk(KERN_ERR, &pdev->dev,
 514                         "failed to allocate ATA host\n");
 515                 rc = -ENOMEM;
 516                 goto err_out;
 517         }
 518
 519         rc = atp867x_ata_pci_sff_init_host(host);
 520         if (rc) {
 521                 dev_printk(KERN_ERR, &pdev->dev, "failed to init host\n");
 522                 goto err_out;
 523         }
 524
 525         pci_set_master(pdev);
 526
 527         rc = ata_host_activate(host, pdev->irq, ata_sff_interrupt,
 528                                 IRQF_SHARED, &atp867x_sht);
 529         if (rc)
 530                 dev_printk(KERN_ERR, &pdev->dev, "failed to activate host\n");
 531
 532 err_out:
 533         return rc;
 534 }
 535
 536 #ifdef CONFIG_PM
 537 static int atp867x_reinit_one(struct pci_dev *pdev)
 538 {
 539         struct ata_host *host = dev_get_drvdata(&pdev->dev);
 540         int rc;
 541
 542         rc = ata_pci_device_do_resume(pdev);
 543         if (rc)
 544                 return rc;
 545
 546         atp867x_fixup(host);
 547
 548         ata_host_resume(host);
 549         return 0;
 550 }
 551 #endif
 552
 553 static struct pci_device_id atp867x_pci_tbl[] = {
 554         { PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867A),      0 },
 555         { PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP867B),      0 },
 556         { },
 557 };
 558
 559 static struct pci_driver atp867x_driver = {
 560         .name           = DRV_NAME,
 561         .id_table       = atp867x_pci_tbl,
 562         .probe          = atp867x_init_one,
 563         .remove         = ata_pci_remove_one,
 564 #ifdef CONFIG_PM
 565         .suspend        = ata_pci_device_suspend,
 566         .resume         = atp867x_reinit_one,
 567 #endif
 568 };
 569
 570 static int __init atp867x_init(void)
 571 {
 572         return pci_register_driver(&atp867x_driver);
 573 }
 574
 575 static void __exit atp867x_exit(void)
 576 {
 577         pci_unregister_driver(&atp867x_driver);
 578 }
 579
 580 MODULE_AUTHOR("John(Jung-Ik) Lee, Google Inc.");
 581 MODULE_DESCRIPTION("low level driver for Artop/Acard 867x ATA controller");
 582 MODULE_LICENSE("GPL");
 583 MODULE_DEVICE_TABLE(pci, atp867x_pci_tbl);
 584 MODULE_VERSION(DRV_VERSION);
 585
 586 module_init(atp867x_init);
 587 module_exit(atp867x_exit);