drivers/ata/sata_via.c

   1 /*
   2  *  sata_via.c - VIA Serial ATA controllers
   3  *
   4  *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
   5  *                 Please ALWAYS copy linux-ide@vger.kernel.org
   6                    on emails.
   7  *
   8  *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
   9  *  Copyright 2003-2004 Jeff Garzik
  10  *
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2, or (at your option)
  15  *  any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; see the file COPYING.  If not, write to
  24  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  25  *
  26  *
  27  *  libata documentation is available via 'make {ps|pdf}docs',
  28  *  as Documentation/DocBook/libata.*
  29  *
  30  *  Hardware documentation available under NDA.
  31  *
  32  *
  33  *  To-do list:
  34  *  - VT6421 PATA support
  35  *
  36  */
  37
  38 #include <linux/kernel.h>
  39 #include <linux/module.h>
  40 #include <linux/pci.h>
  41 #include <linux/init.h>
  42 #include <linux/blkdev.h>
  43 #include <linux/delay.h>
  44 #include <linux/device.h>
  45 #include <scsi/scsi_host.h>
  46 #include <linux/libata.h>
  47
  48 #define DRV_NAME        "sata_via"
  49 #define DRV_VERSION     "2.3"
  50
  51 enum board_ids_enum {
  52         vt6420,
  53         vt6421,
  54 };
  55
  56 enum {
  57         SATA_CHAN_ENAB          = 0x40, /* SATA channel enable */
  58         SATA_INT_GATE           = 0x41, /* SATA interrupt gating */
  59         SATA_NATIVE_MODE        = 0x42, /* Native mode enable */
  60         SATA_PATA_SHARING       = 0x49, /* PATA/SATA sharing func ctrl */
  61         PATA_UDMA_TIMING        = 0xB3, /* PATA timing for DMA/ cable detect */
  62         PATA_PIO_TIMING         = 0xAB, /* PATA timing register */
  63
  64         PORT0                   = (1 << 1),
  65         PORT1                   = (1 << 0),
  66         ALL_PORTS               = PORT0 | PORT1,
  67
  68         NATIVE_MODE_ALL         = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),
  69
  70         SATA_EXT_PHY            = (1 << 6), /* 0==use PATA, 1==ext phy */
  71         SATA_2DEV               = (1 << 5), /* SATA is master/slave */
  72 };
  73
  74 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
  75 static int svia_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
  76 static int svia_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
  77 static void svia_noop_freeze(struct ata_port *ap);
  78 static void vt6420_error_handler(struct ata_port *ap);
  79 static int vt6421_pata_cable_detect(struct ata_port *ap);
  80 static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev);
  81 static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev);
  82
  83 static const struct pci_device_id svia_pci_tbl[] = {
  84         { PCI_VDEVICE(VIA, 0x5337), vt6420 },
  85         { PCI_VDEVICE(VIA, 0x0591), vt6420 },
  86         { PCI_VDEVICE(VIA, 0x3149), vt6420 },
  87         { PCI_VDEVICE(VIA, 0x3249), vt6421 },
  88         { PCI_VDEVICE(VIA, 0x5287), vt6420 },
  89         { PCI_VDEVICE(VIA, 0x5372), vt6420 },
  90         { PCI_VDEVICE(VIA, 0x7372), vt6420 },
  91
  92         { }     /* terminate list */
  93 };
  94
  95 static struct pci_driver svia_pci_driver = {
  96         .name                   = DRV_NAME,
  97         .id_table               = svia_pci_tbl,
  98         .probe                  = svia_init_one,
  99 #ifdef CONFIG_PM
 100         .suspend                = ata_pci_device_suspend,
 101         .resume                 = ata_pci_device_resume,
 102 #endif
 103         .remove                 = ata_pci_remove_one,
 104 };
 105
 106 static struct scsi_host_template svia_sht = {
 107         .module                 = THIS_MODULE,
 108         .name                   = DRV_NAME,
 109         .ioctl                  = ata_scsi_ioctl,
 110         .queuecommand           = ata_scsi_queuecmd,
 111         .can_queue              = ATA_DEF_QUEUE,
 112         .this_id                = ATA_SHT_THIS_ID,
 113         .sg_tablesize           = LIBATA_MAX_PRD,
 114         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 115         .emulated               = ATA_SHT_EMULATED,
 116         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 117         .proc_name              = DRV_NAME,
 118         .dma_boundary           = ATA_DMA_BOUNDARY,
 119         .slave_configure        = ata_scsi_slave_config,
 120         .slave_destroy          = ata_scsi_slave_destroy,
 121         .bios_param             = ata_std_bios_param,
 122 };
 123
 124 static const struct ata_port_operations vt6420_sata_ops = {
 125         .port_disable           = ata_port_disable,
 126
 127         .tf_load                = ata_tf_load,
 128         .tf_read                = ata_tf_read,
 129         .check_status           = ata_check_status,
 130         .exec_command           = ata_exec_command,
 131         .dev_select             = ata_std_dev_select,
 132
 133         .bmdma_setup            = ata_bmdma_setup,
 134         .bmdma_start            = ata_bmdma_start,
 135         .bmdma_stop             = ata_bmdma_stop,
 136         .bmdma_status           = ata_bmdma_status,
 137
 138         .qc_prep                = ata_qc_prep,
 139         .qc_issue               = ata_qc_issue_prot,
 140         .data_xfer              = ata_data_xfer,
 141
 142         .freeze                 = svia_noop_freeze,
 143         .thaw                   = ata_bmdma_thaw,
 144         .error_handler          = vt6420_error_handler,
 145         .post_internal_cmd      = ata_bmdma_post_internal_cmd,
 146
 147         .irq_clear              = ata_bmdma_irq_clear,
 148         .irq_on                 = ata_irq_on,
 149
 150         .port_start             = ata_port_start,
 151 };
 152
 153 static const struct ata_port_operations vt6421_pata_ops = {
 154         .port_disable           = ata_port_disable,
 155
 156         .set_piomode            = vt6421_set_pio_mode,
 157         .set_dmamode            = vt6421_set_dma_mode,
 158
 159         .tf_load                = ata_tf_load,
 160         .tf_read                = ata_tf_read,
 161         .check_status           = ata_check_status,
 162         .exec_command           = ata_exec_command,
 163         .dev_select             = ata_std_dev_select,
 164
 165         .bmdma_setup            = ata_bmdma_setup,
 166         .bmdma_start            = ata_bmdma_start,
 167         .bmdma_stop             = ata_bmdma_stop,
 168         .bmdma_status           = ata_bmdma_status,
 169
 170         .qc_prep                = ata_qc_prep,
 171         .qc_issue               = ata_qc_issue_prot,
 172         .data_xfer              = ata_data_xfer,
 173
 174         .freeze                 = ata_bmdma_freeze,
 175         .thaw                   = ata_bmdma_thaw,
 176         .error_handler          = ata_bmdma_error_handler,
 177         .post_internal_cmd      = ata_bmdma_post_internal_cmd,
 178         .cable_detect           = vt6421_pata_cable_detect,
 179
 180         .irq_clear              = ata_bmdma_irq_clear,
 181         .irq_on                 = ata_irq_on,
 182
 183         .port_start             = ata_port_start,
 184 };
 185
 186 static const struct ata_port_operations vt6421_sata_ops = {
 187         .port_disable           = ata_port_disable,
 188
 189         .tf_load                = ata_tf_load,
 190         .tf_read                = ata_tf_read,
 191         .check_status           = ata_check_status,
 192         .exec_command           = ata_exec_command,
 193         .dev_select             = ata_std_dev_select,
 194
 195         .bmdma_setup            = ata_bmdma_setup,
 196         .bmdma_start            = ata_bmdma_start,
 197         .bmdma_stop             = ata_bmdma_stop,
 198         .bmdma_status           = ata_bmdma_status,
 199
 200         .qc_prep                = ata_qc_prep,
 201         .qc_issue               = ata_qc_issue_prot,
 202         .data_xfer              = ata_data_xfer,
 203
 204         .freeze                 = ata_bmdma_freeze,
 205         .thaw                   = ata_bmdma_thaw,
 206         .error_handler          = ata_bmdma_error_handler,
 207         .post_internal_cmd      = ata_bmdma_post_internal_cmd,
 208         .cable_detect           = ata_cable_sata,
 209
 210         .irq_clear              = ata_bmdma_irq_clear,
 211         .irq_on                 = ata_irq_on,
 212
 213         .scr_read               = svia_scr_read,
 214         .scr_write              = svia_scr_write,
 215
 216         .port_start             = ata_port_start,
 217 };
 218
 219 static const struct ata_port_info vt6420_port_info = {
 220         .flags          = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
 221         .pio_mask       = 0x1f,
 222         .mwdma_mask     = 0x07,
 223         .udma_mask      = ATA_UDMA6,
 224         .port_ops       = &vt6420_sata_ops,
 225 };
 226
 227 static struct ata_port_info vt6421_sport_info = {
 228         .flags          = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
 229         .pio_mask       = 0x1f,
 230         .mwdma_mask     = 0x07,
 231         .udma_mask      = ATA_UDMA6,
 232         .port_ops       = &vt6421_sata_ops,
 233 };
 234
 235 static struct ata_port_info vt6421_pport_info = {
 236         .flags          = ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_LEGACY,
 237         .pio_mask       = 0x1f,
 238         .mwdma_mask     = 0,
 239         .udma_mask      = ATA_UDMA6,
 240         .port_ops       = &vt6421_pata_ops,
 241 };
 242
 243 MODULE_AUTHOR("Jeff Garzik");
 244 MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
 245 MODULE_LICENSE("GPL");
 246 MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
 247 MODULE_VERSION(DRV_VERSION);
 248
 249 static int svia_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
 250 {
 251         if (sc_reg > SCR_CONTROL)
 252                 return -EINVAL;
 253         *val = ioread32(ap->ioaddr.scr_addr + (4 * sc_reg));
 254         return 0;
 255 }
 256
 257 static int svia_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
 258 {
 259         if (sc_reg > SCR_CONTROL)
 260                 return -EINVAL;
 261         iowrite32(val, ap->ioaddr.scr_addr + (4 * sc_reg));
 262         return 0;
 263 }
 264
 265 static void svia_noop_freeze(struct ata_port *ap)
 266 {
 267         /* Some VIA controllers choke if ATA_NIEN is manipulated in
 268          * certain way.  Leave it alone and just clear pending IRQ.
 269          */
 270         ata_chk_status(ap);
 271         ata_bmdma_irq_clear(ap);
 272 }
 273
 274 /**
 275  *      vt6420_prereset - prereset for vt6420
 276  *      @link: target ATA link
 277  *      @deadline: deadline jiffies for the operation
 278  *
 279  *      SCR registers on vt6420 are pieces of shit and may hang the
 280  *      whole machine completely if accessed with the wrong timing.
 281  *      To avoid such catastrophe, vt6420 doesn't provide generic SCR
 282  *      access operations, but uses SStatus and SControl only during
 283  *      boot probing in controlled way.
 284  *
 285  *      As the old (pre EH update) probing code is proven to work, we
 286  *      strictly follow the access pattern.
 287  *
 288  *      LOCKING:
 289  *      Kernel thread context (may sleep)
 290  *
 291  *      RETURNS:
 292  *      0 on success, -errno otherwise.
 293  */
 294 static int vt6420_prereset(struct ata_link *link, unsigned long deadline)
 295 {
 296         struct ata_port *ap = link->ap;
 297         struct ata_eh_context *ehc = &ap->link.eh_context;
 298         unsigned long timeout = jiffies + (HZ * 5);
 299         u32 sstatus, scontrol;
 300         int online;
 301
 302         /* don't do any SCR stuff if we're not loading */
 303         if (!(ap->pflags & ATA_PFLAG_LOADING))
 304                 goto skip_scr;
 305
 306         /* Resume phy.  This is the old SATA resume sequence */
 307         svia_scr_write(ap, SCR_CONTROL, 0x300);
 308         svia_scr_read(ap, SCR_CONTROL, &scontrol); /* flush */
 309
 310         /* wait for phy to become ready, if necessary */
 311         do {
 312                 msleep(200);
 313                 svia_scr_read(ap, SCR_STATUS, &sstatus);
 314                 if ((sstatus & 0xf) != 1)
 315                         break;
 316         } while (time_before(jiffies, timeout));
 317
 318         /* open code sata_print_link_status() */
 319         svia_scr_read(ap, SCR_STATUS, &sstatus);
 320         svia_scr_read(ap, SCR_CONTROL, &scontrol);
 321
 322         online = (sstatus & 0xf) == 0x3;
 323
 324         ata_port_printk(ap, KERN_INFO,
 325                         "SATA link %s 1.5 Gbps (SStatus %X SControl %X)\n",
 326                         online ? "up" : "down", sstatus, scontrol);
 327
 328         /* SStatus is read one more time */
 329         svia_scr_read(ap, SCR_STATUS, &sstatus);
 330
 331         if (!online) {
 332                 /* tell EH to bail */
 333                 ehc->i.action &= ~ATA_EH_RESET_MASK;
 334                 return 0;
 335         }
 336
 337  skip_scr:
 338         /* wait for !BSY */
 339         ata_wait_ready(ap, deadline);
 340
 341         return 0;
 342 }
 343
 344 static void vt6420_error_handler(struct ata_port *ap)
 345 {
 346         return ata_bmdma_drive_eh(ap, vt6420_prereset, ata_std_softreset,
 347                                   NULL, ata_std_postreset);
 348 }
 349
 350 static int vt6421_pata_cable_detect(struct ata_port *ap)
 351 {
 352         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 353         u8 tmp;
 354
 355         pci_read_config_byte(pdev, PATA_UDMA_TIMING, &tmp);
 356         if (tmp & 0x10)
 357                 return ATA_CBL_PATA40;
 358         return ATA_CBL_PATA80;
 359 }
 360
 361 static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev)
 362 {
 363         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 364         static const u8 pio_bits[] = { 0xA8, 0x65, 0x65, 0x31, 0x20 };
 365         pci_write_config_byte(pdev, PATA_PIO_TIMING, pio_bits[adev->pio_mode - XFER_PIO_0]);
 366 }
 367
 368 static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev)
 369 {
 370         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 371         static const u8 udma_bits[] = { 0xEE, 0xE8, 0xE6, 0xE4, 0xE2, 0xE1, 0xE0, 0xE0 };
 372         pci_write_config_byte(pdev, PATA_UDMA_TIMING, udma_bits[adev->dma_mode - XFER_UDMA_0]);
 373 }
 374
 375 static const unsigned int svia_bar_sizes[] = {
 376         8, 4, 8, 4, 16, 256
 377 };
 378
 379 static const unsigned int vt6421_bar_sizes[] = {
 380         16, 16, 16, 16, 32, 128
 381 };
 382
 383 static void __iomem * svia_scr_addr(void __iomem *addr, unsigned int port)
 384 {
 385         return addr + (port * 128);
 386 }
 387
 388 static void __iomem * vt6421_scr_addr(void __iomem *addr, unsigned int port)
 389 {
 390         return addr + (port * 64);
 391 }
 392
 393 static void vt6421_init_addrs(struct ata_port *ap)
 394 {
 395         void __iomem * const * iomap = ap->host->iomap;
 396         void __iomem *reg_addr = iomap[ap->port_no];
 397         void __iomem *bmdma_addr = iomap[4] + (ap->port_no * 8);
 398         struct ata_ioports *ioaddr = &ap->ioaddr;
 399
 400         ioaddr->cmd_addr = reg_addr;
 401         ioaddr->altstatus_addr =
 402         ioaddr->ctl_addr = (void __iomem *)
 403                 ((unsigned long)(reg_addr + 8) | ATA_PCI_CTL_OFS);
 404         ioaddr->bmdma_addr = bmdma_addr;
 405         ioaddr->scr_addr = vt6421_scr_addr(iomap[5], ap->port_no);
 406
 407         ata_std_ports(ioaddr);
 408 }
 409
 410 static int vt6420_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
 411 {
 412         const struct ata_port_info *ppi[] = { &vt6420_port_info, NULL };
 413         struct ata_host *host;
 414         int rc;
 415
 416         rc = ata_pci_prepare_sff_host(pdev, ppi, &host);
 417         if (rc)
 418                 return rc;
 419         *r_host = host;
 420
 421         rc = pcim_iomap_regions(pdev, 1 << 5, DRV_NAME);
 422         if (rc) {
 423                 dev_printk(KERN_ERR, &pdev->dev, "failed to iomap PCI BAR 5\n");
 424                 return rc;
 425         }
 426
 427         host->ports[0]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 0);
 428         host->ports[1]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 1);
 429
 430         return 0;
 431 }
 432
 433 static int vt6421_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
 434 {
 435         const struct ata_port_info *ppi[] =
 436                 { &vt6421_sport_info, &vt6421_sport_info, &vt6421_pport_info };
 437         struct ata_host *host;
 438         int i, rc;
 439
 440         *r_host = host = ata_host_alloc_pinfo(&pdev->dev, ppi, ARRAY_SIZE(ppi));
 441         if (!host) {
 442                 dev_printk(KERN_ERR, &pdev->dev, "failed to allocate host\n");
 443                 return -ENOMEM;
 444         }
 445
 446         rc = pcim_iomap_regions(pdev, 0x3f, DRV_NAME);
 447         if (rc) {
 448                 dev_printk(KERN_ERR, &pdev->dev, "failed to request/iomap "
 449                            "PCI BARs (errno=%d)\n", rc);
 450                 return rc;
 451         }
 452         host->iomap = pcim_iomap_table(pdev);
 453
 454         for (i = 0; i < host->n_ports; i++)
 455                 vt6421_init_addrs(host->ports[i]);
 456
 457         rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
 458         if (rc)
 459                 return rc;
 460         rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
 461         if (rc)
 462                 return rc;
 463
 464         return 0;
 465 }
 466
 467 static void svia_configure(struct pci_dev *pdev)
 468 {
 469         u8 tmp8;
 470
 471         pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
 472         dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n",
 473                (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
 474
 475         /* make sure SATA channels are enabled */
 476         pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
 477         if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
 478                 dev_printk(KERN_DEBUG, &pdev->dev,
 479                            "enabling SATA channels (0x%x)\n",
 480                            (int) tmp8);
 481                 tmp8 |= ALL_PORTS;
 482                 pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
 483         }
 484
 485         /* make sure interrupts for each channel sent to us */
 486         pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
 487         if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
 488                 dev_printk(KERN_DEBUG, &pdev->dev,
 489                            "enabling SATA channel interrupts (0x%x)\n",
 490                            (int) tmp8);
 491                 tmp8 |= ALL_PORTS;
 492                 pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
 493         }
 494
 495         /* make sure native mode is enabled */
 496         pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
 497         if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
 498                 dev_printk(KERN_DEBUG, &pdev->dev,
 499                            "enabling SATA channel native mode (0x%x)\n",
 500                            (int) tmp8);
 501                 tmp8 |= NATIVE_MODE_ALL;
 502                 pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
 503         }
 504 }
 505
 506 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 507 {
 508         static int printed_version;
 509         unsigned int i;
 510         int rc;
 511         struct ata_host *host;
 512         int board_id = (int) ent->driver_data;
 513         const int *bar_sizes;
 514         u8 tmp8;
 515
 516         if (!printed_version++)
 517                 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
 518
 519         rc = pcim_enable_device(pdev);
 520         if (rc)
 521                 return rc;
 522
 523         if (board_id == vt6420) {
 524                 pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
 525                 if (tmp8 & SATA_2DEV) {
 526                         dev_printk(KERN_ERR, &pdev->dev,
 527                                    "SATA master/slave not supported (0x%x)\n",
 528                                    (int) tmp8);
 529                         return -EIO;
 530                 }
 531
 532                 bar_sizes = &svia_bar_sizes[0];
 533         } else {
 534                 bar_sizes = &vt6421_bar_sizes[0];
 535         }
 536
 537         for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
 538                 if ((pci_resource_start(pdev, i) == 0) ||
 539                     (pci_resource_len(pdev, i) < bar_sizes[i])) {
 540                         dev_printk(KERN_ERR, &pdev->dev,
 541                                 "invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n",
 542                                 i,
 543                                 (unsigned long long)pci_resource_start(pdev, i),
 544                                 (unsigned long long)pci_resource_len(pdev, i));
 545                         return -ENODEV;
 546                 }
 547
 548         if (board_id == vt6420)
 549                 rc = vt6420_prepare_host(pdev, &host);
 550         else
 551                 rc = vt6421_prepare_host(pdev, &host);
 552         if (rc)
 553                 return rc;
 554
 555         svia_configure(pdev);
 556
 557         pci_set_master(pdev);
 558         return ata_host_activate(host, pdev->irq, ata_interrupt, IRQF_SHARED,
 559                                  &svia_sht);
 560 }
 561
 562 static int __init svia_init(void)
 563 {
 564         return pci_register_driver(&svia_pci_driver);
 565 }
 566
 567 static void __exit svia_exit(void)
 568 {
 569         pci_unregister_driver(&svia_pci_driver);
 570 }
 571
 572 module_init(svia_init);
 573 module_exit(svia_exit);