1 /* 2 * pata_via.c - VIA PATA for new ATA layer 3 * (C) 2005-2006 Red Hat Inc 4 * 5 * Documentation 6 * Most chipset documentation available under NDA only 7 * 8 * VIA version guide 9 * VIA VT82C561 - early design, uses ata_generic currently 10 * VIA VT82C576 - MWDMA, 33Mhz 11 * VIA VT82C586 - MWDMA, 33Mhz 12 * VIA VT82C586a - Added UDMA to 33Mhz 13 * VIA VT82C586b - UDMA33 14 * VIA VT82C596a - Nonfunctional UDMA66 15 * VIA VT82C596b - Working UDMA66 16 * VIA VT82C686 - Nonfunctional UDMA66 17 * VIA VT82C686a - Working UDMA66 18 * VIA VT82C686b - Updated to UDMA100 19 * VIA VT8231 - UDMA100 20 * VIA VT8233 - UDMA100 21 * VIA VT8233a - UDMA133 22 * VIA VT8233c - UDMA100 23 * VIA VT8235 - UDMA133 24 * VIA VT8237 - UDMA133 25 * VIA VT8237A - UDMA133 26 * VIA VT8237S - UDMA133 27 * VIA VT8251 - UDMA133 28 * 29 * Most registers remain compatible across chips. Others start reserved 30 * and acquire sensible semantics if set to 1 (eg cable detect). A few 31 * exceptions exist, notably around the FIFO settings. 32 * 33 * One additional quirk of the VIA design is that like ALi they use few 34 * PCI IDs for a lot of chips. 35 * 36 * Based heavily on: 37 * 38 * Version 3.38 39 * 40 * VIA IDE driver for Linux. Supported southbridges: 41 * 42 * vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b, 43 * vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a, 44 * vt8235, vt8237 45 * 46 * Copyright (c) 2000-2002 Vojtech Pavlik 47 * 48 * Based on the work of: 49 * Michel Aubry 50 * Jeff Garzik 51 * Andre Hedrick 52 53 */ 54 55 #include <linux/kernel.h> 56 #include <linux/module.h> 57 #include <linux/pci.h> 58 #include <linux/blkdev.h> 59 #include <linux/delay.h> 60 #include <linux/gfp.h> 61 #include <scsi/scsi_host.h> 62 #include <linux/libata.h> 63 #include <linux/dmi.h> 64 65 #define DRV_NAME "pata_via" 66 #define DRV_VERSION "0.3.4" 67 68 enum { 69 VIA_BAD_PREQ = 0x01, /* Crashes if PREQ# till DDACK# set */ 70 VIA_BAD_CLK66 = 0x02, /* 66 MHz clock doesn't work correctly */ 71 VIA_SET_FIFO = 0x04, /* Needs to have FIFO split set */ 72 VIA_NO_UNMASK = 0x08, /* Doesn't work with IRQ unmasking on */ 73 VIA_BAD_ID = 0x10, /* Has wrong vendor ID (0x1107) */ 74 VIA_BAD_AST = 0x20, /* Don't touch Address Setup Timing */ 75 VIA_NO_ENABLES = 0x40, /* Has no enablebits */ 76 VIA_SATA_PATA = 0x80, /* SATA/PATA combined configuration */ 77 }; 78 79 enum { 80 VIA_IDFLAG_SINGLE = (1 << 0), /* single channel controller) */ 81 }; 82 83 /* 84 * VIA SouthBridge chips. 85 */ 86 87 static const struct via_isa_bridge { 88 const char *name; 89 u16 id; 90 u8 rev_min; 91 u8 rev_max; 92 u8 udma_mask; 93 u8 flags; 94 } via_isa_bridges[] = { 95 { "vx855", PCI_DEVICE_ID_VIA_VX855, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA }, 96 { "vx800", PCI_DEVICE_ID_VIA_VX800, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA }, 97 { "vt8261", PCI_DEVICE_ID_VIA_8261, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 98 { "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 99 { "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 100 { "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA }, 101 { "vt6410", PCI_DEVICE_ID_VIA_6410, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_NO_ENABLES }, 102 { "vt6415", PCI_DEVICE_ID_VIA_6415, 0x00, 0xff, ATA_UDMA6, VIA_BAD_AST | VIA_NO_ENABLES }, 103 { "vt8237a", PCI_DEVICE_ID_VIA_8237A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 104 { "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 105 { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 106 { "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 107 { "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, ATA_UDMA5, }, 108 { "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, ATA_UDMA5, }, 109 { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, ATA_UDMA5, }, 110 { "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, ATA_UDMA5, }, 111 { "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, ATA_UDMA4, }, 112 { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 }, 113 { "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, ATA_UDMA4, }, 114 { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 }, 115 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO }, 116 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ }, 117 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO }, 118 { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO }, 119 { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, 0x00, VIA_SET_FIFO }, 120 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK }, 121 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID }, 122 { "vtxxxx", PCI_DEVICE_ID_VIA_ANON, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 123 { NULL } 124 }; 125 126 static const struct dmi_system_id no_atapi_dma_dmi_table[] = { 127 { 128 .ident = "AVERATEC 3200", 129 .matches = { 130 DMI_MATCH(DMI_BOARD_VENDOR, "AVERATEC"), 131 DMI_MATCH(DMI_BOARD_NAME, "3200"), 132 }, 133 }, 134 { } 135 }; 136 137 struct via_port { 138 u8 cached_device; 139 }; 140 141 /* 142 * Cable special cases 143 */ 144 145 static const struct dmi_system_id cable_dmi_table[] = { 146 { 147 .ident = "Acer Ferrari 3400", 148 .matches = { 149 DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."), 150 DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"), 151 }, 152 }, 153 { } 154 }; 155 156 static int via_cable_override(struct pci_dev *pdev) 157 { 158 /* Systems by DMI */ 159 if (dmi_check_system(cable_dmi_table)) 160 return 1; 161 /* Arima W730-K8/Targa Visionary 811/... */ 162 if (pdev->subsystem_vendor == 0x161F && pdev->subsystem_device == 0x2032) 163 return 1; 164 return 0; 165 } 166 167 168 /** 169 * via_cable_detect - cable detection 170 * @ap: ATA port 171 * 172 * Perform cable detection. Actually for the VIA case the BIOS 173 * already did this for us. We read the values provided by the 174 * BIOS. If you are using an 8235 in a non-PC configuration you 175 * may need to update this code. 176 * 177 * Hotplug also impacts on this. 178 */ 179 180 static int via_cable_detect(struct ata_port *ap) { 181 const struct via_isa_bridge *config = ap->host->private_data; 182 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 183 u32 ata66; 184 185 if (via_cable_override(pdev)) 186 return ATA_CBL_PATA40_SHORT; 187 188 if ((config->flags & VIA_SATA_PATA) && ap->port_no == 0) 189 return ATA_CBL_SATA; 190 191 /* Early chips are 40 wire */ 192 if (config->udma_mask < ATA_UDMA4) 193 return ATA_CBL_PATA40; 194 /* UDMA 66 chips have only drive side logic */ 195 else if (config->udma_mask < ATA_UDMA5) 196 return ATA_CBL_PATA_UNK; 197 /* UDMA 100 or later */ 198 pci_read_config_dword(pdev, 0x50, &ata66); 199 /* Check both the drive cable reporting bits, we might not have 200 two drives */ 201 if (ata66 & (0x10100000 >> (16 * ap->port_no))) 202 return ATA_CBL_PATA80; 203 /* Check with ACPI so we can spot BIOS reported SATA bridges */ 204 if (ata_acpi_init_gtm(ap) && 205 ata_acpi_cbl_80wire(ap, ata_acpi_init_gtm(ap))) 206 return ATA_CBL_PATA80; 207 return ATA_CBL_PATA40; 208 } 209 210 static int via_pre_reset(struct ata_link *link, unsigned long deadline) 211 { 212 struct ata_port *ap = link->ap; 213 const struct via_isa_bridge *config = ap->host->private_data; 214 215 if (!(config->flags & VIA_NO_ENABLES)) { 216 static const struct pci_bits via_enable_bits[] = { 217 { 0x40, 1, 0x02, 0x02 }, 218 { 0x40, 1, 0x01, 0x01 } 219 }; 220 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 221 if (!pci_test_config_bits(pdev, &via_enable_bits[ap->port_no])) 222 return -ENOENT; 223 } 224 225 return ata_sff_prereset(link, deadline); 226 } 227 228 229 /** 230 * via_do_set_mode - set transfer mode data 231 * @ap: ATA interface 232 * @adev: ATA device 233 * @mode: ATA mode being programmed 234 * @set_ast: Set to program address setup 235 * @udma_type: UDMA mode/format of registers 236 * 237 * Program the VIA registers for DMA and PIO modes. Uses the ata timing 238 * support in order to compute modes. 239 * 240 * FIXME: Hotplug will require we serialize multiple mode changes 241 * on the two channels. 242 */ 243 244 static void via_do_set_mode(struct ata_port *ap, struct ata_device *adev, 245 int mode, int set_ast, int udma_type) 246 { 247 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 248 struct ata_device *peer = ata_dev_pair(adev); 249 struct ata_timing t, p; 250 static int via_clock = 33333; /* Bus clock in kHZ */ 251 unsigned long T = 1000000000 / via_clock; 252 unsigned long UT = T; 253 int ut; 254 int offset = 3 - (2*ap->port_no) - adev->devno; 255 256 switch (udma_type) { 257 case ATA_UDMA4: 258 UT = T / 2; break; 259 case ATA_UDMA5: 260 UT = T / 3; break; 261 case ATA_UDMA6: 262 UT = T / 4; break; 263 } 264 265 /* Calculate the timing values we require */ 266 ata_timing_compute(adev, mode, &t, T, UT); 267 268 /* We share 8bit timing so we must merge the constraints */ 269 if (peer) { 270 if (peer->pio_mode) { 271 ata_timing_compute(peer, peer->pio_mode, &p, T, UT); 272 ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT); 273 } 274 } 275 276 /* Address setup is programmable but breaks on UDMA133 setups */ 277 if (set_ast) { 278 u8 setup; /* 2 bits per drive */ 279 int shift = 2 * offset; 280 281 pci_read_config_byte(pdev, 0x4C, &setup); 282 setup &= ~(3 << shift); 283 setup |= (clamp_val(t.setup, 1, 4) - 1) << shift; 284 pci_write_config_byte(pdev, 0x4C, setup); 285 } 286 287 /* Load the PIO mode bits */ 288 pci_write_config_byte(pdev, 0x4F - ap->port_no, 289 ((clamp_val(t.act8b, 1, 16) - 1) << 4) | (clamp_val(t.rec8b, 1, 16) - 1)); 290 pci_write_config_byte(pdev, 0x48 + offset, 291 ((clamp_val(t.active, 1, 16) - 1) << 4) | (clamp_val(t.recover, 1, 16) - 1)); 292 293 /* Load the UDMA bits according to type */ 294 switch (udma_type) { 295 case ATA_UDMA2: 296 default: 297 ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 5) - 2)) : 0x03; 298 break; 299 case ATA_UDMA4: 300 ut = t.udma ? (0xe8 | (clamp_val(t.udma, 2, 9) - 2)) : 0x0f; 301 break; 302 case ATA_UDMA5: 303 ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07; 304 break; 305 case ATA_UDMA6: 306 ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07; 307 break; 308 } 309 310 /* Set UDMA unless device is not UDMA capable */ 311 if (udma_type) { 312 u8 udma_etc; 313 314 pci_read_config_byte(pdev, 0x50 + offset, &udma_etc); 315 316 /* clear transfer mode bit */ 317 udma_etc &= ~0x20; 318 319 if (t.udma) { 320 /* preserve 80-wire cable detection bit */ 321 udma_etc &= 0x10; 322 udma_etc |= ut; 323 } 324 325 pci_write_config_byte(pdev, 0x50 + offset, udma_etc); 326 } 327 } 328 329 static void via_set_piomode(struct ata_port *ap, struct ata_device *adev) 330 { 331 const struct via_isa_bridge *config = ap->host->private_data; 332 int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1; 333 334 via_do_set_mode(ap, adev, adev->pio_mode, set_ast, config->udma_mask); 335 } 336 337 static void via_set_dmamode(struct ata_port *ap, struct ata_device *adev) 338 { 339 const struct via_isa_bridge *config = ap->host->private_data; 340 int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1; 341 342 via_do_set_mode(ap, adev, adev->dma_mode, set_ast, config->udma_mask); 343 } 344 345 /** 346 * via_mode_filter - filter buggy device/mode pairs 347 * @dev: ATA device 348 * @mask: Mode bitmask 349 * 350 * We need to apply some minimal filtering for old controllers and at least 351 * one breed of Transcend SSD. Return the updated mask. 352 */ 353 354 static unsigned long via_mode_filter(struct ata_device *dev, unsigned long mask) 355 { 356 struct ata_host *host = dev->link->ap->host; 357 const struct via_isa_bridge *config = host->private_data; 358 unsigned char model_num[ATA_ID_PROD_LEN + 1]; 359 360 if (config->id == PCI_DEVICE_ID_VIA_82C586_0) { 361 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 362 if (strcmp(model_num, "TS64GSSD25-M") == 0) { 363 ata_dev_warn(dev, 364 "disabling UDMA mode due to reported lockups with this device\n"); 365 mask &= ~ ATA_MASK_UDMA; 366 } 367 } 368 369 if (dev->class == ATA_DEV_ATAPI && 370 dmi_check_system(no_atapi_dma_dmi_table)) { 371 ata_dev_warn(dev, "controller locks up on ATAPI DMA, forcing PIO\n"); 372 mask &= ATA_MASK_PIO; 373 } 374 375 return mask; 376 } 377 378 /** 379 * via_tf_load - send taskfile registers to host controller 380 * @ap: Port to which output is sent 381 * @tf: ATA taskfile register set 382 * 383 * Outputs ATA taskfile to standard ATA host controller. 384 * 385 * Note: This is to fix the internal bug of via chipsets, which 386 * will reset the device register after changing the IEN bit on 387 * ctl register 388 */ 389 static void via_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) 390 { 391 struct ata_ioports *ioaddr = &ap->ioaddr; 392 struct via_port *vp = ap->private_data; 393 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; 394 int newctl = 0; 395 396 if (tf->ctl != ap->last_ctl) { 397 iowrite8(tf->ctl, ioaddr->ctl_addr); 398 ap->last_ctl = tf->ctl; 399 ata_wait_idle(ap); 400 newctl = 1; 401 } 402 403 if (tf->flags & ATA_TFLAG_DEVICE) { 404 iowrite8(tf->device, ioaddr->device_addr); 405 vp->cached_device = tf->device; 406 } else if (newctl) 407 iowrite8(vp->cached_device, ioaddr->device_addr); 408 409 if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { 410 WARN_ON_ONCE(!ioaddr->ctl_addr); 411 iowrite8(tf->hob_feature, ioaddr->feature_addr); 412 iowrite8(tf->hob_nsect, ioaddr->nsect_addr); 413 iowrite8(tf->hob_lbal, ioaddr->lbal_addr); 414 iowrite8(tf->hob_lbam, ioaddr->lbam_addr); 415 iowrite8(tf->hob_lbah, ioaddr->lbah_addr); 416 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n", 417 tf->hob_feature, 418 tf->hob_nsect, 419 tf->hob_lbal, 420 tf->hob_lbam, 421 tf->hob_lbah); 422 } 423 424 if (is_addr) { 425 iowrite8(tf->feature, ioaddr->feature_addr); 426 iowrite8(tf->nsect, ioaddr->nsect_addr); 427 iowrite8(tf->lbal, ioaddr->lbal_addr); 428 iowrite8(tf->lbam, ioaddr->lbam_addr); 429 iowrite8(tf->lbah, ioaddr->lbah_addr); 430 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n", 431 tf->feature, 432 tf->nsect, 433 tf->lbal, 434 tf->lbam, 435 tf->lbah); 436 } 437 438 ata_wait_idle(ap); 439 } 440 441 static int via_port_start(struct ata_port *ap) 442 { 443 struct via_port *vp; 444 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 445 446 int ret = ata_bmdma_port_start(ap); 447 if (ret < 0) 448 return ret; 449 450 vp = devm_kzalloc(&pdev->dev, sizeof(struct via_port), GFP_KERNEL); 451 if (vp == NULL) 452 return -ENOMEM; 453 ap->private_data = vp; 454 return 0; 455 } 456 457 static struct scsi_host_template via_sht = { 458 ATA_BMDMA_SHT(DRV_NAME), 459 }; 460 461 static struct ata_port_operations via_port_ops = { 462 .inherits = &ata_bmdma_port_ops, 463 .cable_detect = via_cable_detect, 464 .set_piomode = via_set_piomode, 465 .set_dmamode = via_set_dmamode, 466 .prereset = via_pre_reset, 467 .sff_tf_load = via_tf_load, 468 .port_start = via_port_start, 469 .mode_filter = via_mode_filter, 470 }; 471 472 static struct ata_port_operations via_port_ops_noirq = { 473 .inherits = &via_port_ops, 474 .sff_data_xfer = ata_sff_data_xfer_noirq, 475 }; 476 477 /** 478 * via_config_fifo - set up the FIFO 479 * @pdev: PCI device 480 * @flags: configuration flags 481 * 482 * Set the FIFO properties for this device if necessary. Used both on 483 * set up and on and the resume path 484 */ 485 486 static void via_config_fifo(struct pci_dev *pdev, unsigned int flags) 487 { 488 u8 enable; 489 490 /* 0x40 low bits indicate enabled channels */ 491 pci_read_config_byte(pdev, 0x40 , &enable); 492 enable &= 3; 493 494 if (flags & VIA_SET_FIFO) { 495 static const u8 fifo_setting[4] = {0x00, 0x60, 0x00, 0x20}; 496 u8 fifo; 497 498 pci_read_config_byte(pdev, 0x43, &fifo); 499 500 /* Clear PREQ# until DDACK# for errata */ 501 if (flags & VIA_BAD_PREQ) 502 fifo &= 0x7F; 503 else 504 fifo &= 0x9f; 505 /* Turn on FIFO for enabled channels */ 506 fifo |= fifo_setting[enable]; 507 pci_write_config_byte(pdev, 0x43, fifo); 508 } 509 } 510 511 static void via_fixup(struct pci_dev *pdev, const struct via_isa_bridge *config) 512 { 513 u32 timing; 514 515 /* Initialise the FIFO for the enabled channels. */ 516 via_config_fifo(pdev, config->flags); 517 518 if (config->udma_mask == ATA_UDMA4) { 519 /* The 66 MHz devices require we enable the clock */ 520 pci_read_config_dword(pdev, 0x50, &timing); 521 timing |= 0x80008; 522 pci_write_config_dword(pdev, 0x50, timing); 523 } 524 if (config->flags & VIA_BAD_CLK66) { 525 /* Disable the 66MHz clock on problem devices */ 526 pci_read_config_dword(pdev, 0x50, &timing); 527 timing &= ~0x80008; 528 pci_write_config_dword(pdev, 0x50, timing); 529 } 530 } 531 532 /** 533 * via_init_one - discovery callback 534 * @pdev: PCI device 535 * @id: PCI table info 536 * 537 * A VIA IDE interface has been discovered. Figure out what revision 538 * and perform configuration work before handing it to the ATA layer 539 */ 540 541 static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id) 542 { 543 /* Early VIA without UDMA support */ 544 static const struct ata_port_info via_mwdma_info = { 545 .flags = ATA_FLAG_SLAVE_POSS, 546 .pio_mask = ATA_PIO4, 547 .mwdma_mask = ATA_MWDMA2, 548 .port_ops = &via_port_ops 549 }; 550 /* Ditto with IRQ masking required */ 551 static const struct ata_port_info via_mwdma_info_borked = { 552 .flags = ATA_FLAG_SLAVE_POSS, 553 .pio_mask = ATA_PIO4, 554 .mwdma_mask = ATA_MWDMA2, 555 .port_ops = &via_port_ops_noirq, 556 }; 557 /* VIA UDMA 33 devices (and borked 66) */ 558 static const struct ata_port_info via_udma33_info = { 559 .flags = ATA_FLAG_SLAVE_POSS, 560 .pio_mask = ATA_PIO4, 561 .mwdma_mask = ATA_MWDMA2, 562 .udma_mask = ATA_UDMA2, 563 .port_ops = &via_port_ops 564 }; 565 /* VIA UDMA 66 devices */ 566 static const struct ata_port_info via_udma66_info = { 567 .flags = ATA_FLAG_SLAVE_POSS, 568 .pio_mask = ATA_PIO4, 569 .mwdma_mask = ATA_MWDMA2, 570 .udma_mask = ATA_UDMA4, 571 .port_ops = &via_port_ops 572 }; 573 /* VIA UDMA 100 devices */ 574 static const struct ata_port_info via_udma100_info = { 575 .flags = ATA_FLAG_SLAVE_POSS, 576 .pio_mask = ATA_PIO4, 577 .mwdma_mask = ATA_MWDMA2, 578 .udma_mask = ATA_UDMA5, 579 .port_ops = &via_port_ops 580 }; 581 /* UDMA133 with bad AST (All current 133) */ 582 static const struct ata_port_info via_udma133_info = { 583 .flags = ATA_FLAG_SLAVE_POSS, 584 .pio_mask = ATA_PIO4, 585 .mwdma_mask = ATA_MWDMA2, 586 .udma_mask = ATA_UDMA6, /* FIXME: should check north bridge */ 587 .port_ops = &via_port_ops 588 }; 589 const struct ata_port_info *ppi[] = { NULL, NULL }; 590 struct pci_dev *isa; 591 const struct via_isa_bridge *config; 592 u8 enable; 593 unsigned long flags = id->driver_data; 594 int rc; 595 596 ata_print_version_once(&pdev->dev, DRV_VERSION); 597 598 rc = pcim_enable_device(pdev); 599 if (rc) 600 return rc; 601 602 if (flags & VIA_IDFLAG_SINGLE) 603 ppi[1] = &ata_dummy_port_info; 604 605 /* To find out how the IDE will behave and what features we 606 actually have to look at the bridge not the IDE controller */ 607 for (config = via_isa_bridges; config->id != PCI_DEVICE_ID_VIA_ANON; 608 config++) 609 if ((isa = pci_get_device(PCI_VENDOR_ID_VIA + 610 !!(config->flags & VIA_BAD_ID), 611 config->id, NULL))) { 612 u8 rev = isa->revision; 613 pci_dev_put(isa); 614 615 if ((id->device == 0x0415 || id->device == 0x3164) && 616 (config->id != id->device)) 617 continue; 618 619 if (rev >= config->rev_min && rev <= config->rev_max) 620 break; 621 } 622 623 if (!(config->flags & VIA_NO_ENABLES)) { 624 /* 0x40 low bits indicate enabled channels */ 625 pci_read_config_byte(pdev, 0x40 , &enable); 626 enable &= 3; 627 if (enable == 0) 628 return -ENODEV; 629 } 630 631 /* Clock set up */ 632 switch (config->udma_mask) { 633 case 0x00: 634 if (config->flags & VIA_NO_UNMASK) 635 ppi[0] = &via_mwdma_info_borked; 636 else 637 ppi[0] = &via_mwdma_info; 638 break; 639 case ATA_UDMA2: 640 ppi[0] = &via_udma33_info; 641 break; 642 case ATA_UDMA4: 643 ppi[0] = &via_udma66_info; 644 break; 645 case ATA_UDMA5: 646 ppi[0] = &via_udma100_info; 647 break; 648 case ATA_UDMA6: 649 ppi[0] = &via_udma133_info; 650 break; 651 default: 652 WARN_ON(1); 653 return -ENODEV; 654 } 655 656 via_fixup(pdev, config); 657 658 /* We have established the device type, now fire it up */ 659 return ata_pci_bmdma_init_one(pdev, ppi, &via_sht, (void *)config, 0); 660 } 661 662 #ifdef CONFIG_PM_SLEEP 663 /** 664 * via_reinit_one - reinit after resume 665 * @pdev; PCI device 666 * 667 * Called when the VIA PATA device is resumed. We must then 668 * reconfigure the fifo and other setup we may have altered. In 669 * addition the kernel needs to have the resume methods on PCI 670 * quirk supported. 671 */ 672 673 static int via_reinit_one(struct pci_dev *pdev) 674 { 675 struct ata_host *host = pci_get_drvdata(pdev); 676 int rc; 677 678 rc = ata_pci_device_do_resume(pdev); 679 if (rc) 680 return rc; 681 682 via_fixup(pdev, host->private_data); 683 684 ata_host_resume(host); 685 return 0; 686 } 687 #endif 688 689 static const struct pci_device_id via[] = { 690 { PCI_VDEVICE(VIA, 0x0415), }, 691 { PCI_VDEVICE(VIA, 0x0571), }, 692 { PCI_VDEVICE(VIA, 0x0581), }, 693 { PCI_VDEVICE(VIA, 0x1571), }, 694 { PCI_VDEVICE(VIA, 0x3164), }, 695 { PCI_VDEVICE(VIA, 0x5324), }, 696 { PCI_VDEVICE(VIA, 0xC409), VIA_IDFLAG_SINGLE }, 697 { PCI_VDEVICE(VIA, 0x9001), VIA_IDFLAG_SINGLE }, 698 699 { }, 700 }; 701 702 static struct pci_driver via_pci_driver = { 703 .name = DRV_NAME, 704 .id_table = via, 705 .probe = via_init_one, 706 .remove = ata_pci_remove_one, 707 #ifdef CONFIG_PM_SLEEP 708 .suspend = ata_pci_device_suspend, 709 .resume = via_reinit_one, 710 #endif 711 }; 712 713 module_pci_driver(via_pci_driver); 714 715 MODULE_AUTHOR("Alan Cox"); 716 MODULE_DESCRIPTION("low-level driver for VIA PATA"); 717 MODULE_LICENSE("GPL"); 718 MODULE_DEVICE_TABLE(pci, via); 719 MODULE_VERSION(DRV_VERSION); 720