1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * pata_via.c - VIA PATA for new ATA layer 4 * (C) 2005-2006 Red Hat Inc 5 * 6 * Documentation 7 * Most chipset documentation available under NDA only 8 * 9 * VIA version guide 10 * VIA VT82C561 - early design, uses ata_generic currently 11 * VIA VT82C576 - MWDMA, 33Mhz 12 * VIA VT82C586 - MWDMA, 33Mhz 13 * VIA VT82C586a - Added UDMA to 33Mhz 14 * VIA VT82C586b - UDMA33 15 * VIA VT82C596a - Nonfunctional UDMA66 16 * VIA VT82C596b - Working UDMA66 17 * VIA VT82C686 - Nonfunctional UDMA66 18 * VIA VT82C686a - Working UDMA66 19 * VIA VT82C686b - Updated to UDMA100 20 * VIA VT8231 - UDMA100 21 * VIA VT8233 - UDMA100 22 * VIA VT8233a - UDMA133 23 * VIA VT8233c - UDMA100 24 * VIA VT8235 - UDMA133 25 * VIA VT8237 - UDMA133 26 * VIA VT8237A - UDMA133 27 * VIA VT8237S - UDMA133 28 * VIA VT8251 - UDMA133 29 * 30 * Most registers remain compatible across chips. Others start reserved 31 * and acquire sensible semantics if set to 1 (eg cable detect). A few 32 * exceptions exist, notably around the FIFO settings. 33 * 34 * One additional quirk of the VIA design is that like ALi they use few 35 * PCI IDs for a lot of chips. 36 * 37 * Based heavily on: 38 * 39 * Version 3.38 40 * 41 * VIA IDE driver for Linux. Supported southbridges: 42 * 43 * vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b, 44 * vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a, 45 * vt8235, vt8237 46 * 47 * Copyright (c) 2000-2002 Vojtech Pavlik 48 * 49 * Based on the work of: 50 * Michel Aubry 51 * Jeff Garzik 52 * Andre Hedrick 53 54 */ 55 56 #include <linux/kernel.h> 57 #include <linux/module.h> 58 #include <linux/pci.h> 59 #include <linux/blkdev.h> 60 #include <linux/delay.h> 61 #include <linux/gfp.h> 62 #include <scsi/scsi_host.h> 63 #include <linux/libata.h> 64 #include <linux/dmi.h> 65 66 #define DRV_NAME "pata_via" 67 #define DRV_VERSION "0.3.4" 68 69 enum { 70 VIA_BAD_PREQ = 0x01, /* Crashes if PREQ# till DDACK# set */ 71 VIA_BAD_CLK66 = 0x02, /* 66 MHz clock doesn't work correctly */ 72 VIA_SET_FIFO = 0x04, /* Needs to have FIFO split set */ 73 VIA_NO_UNMASK = 0x08, /* Doesn't work with IRQ unmasking on */ 74 VIA_BAD_ID = 0x10, /* Has wrong vendor ID (0x1107) */ 75 VIA_BAD_AST = 0x20, /* Don't touch Address Setup Timing */ 76 VIA_NO_ENABLES = 0x40, /* Has no enablebits */ 77 VIA_SATA_PATA = 0x80, /* SATA/PATA combined configuration */ 78 }; 79 80 enum { 81 VIA_IDFLAG_SINGLE = (1 << 0), /* single channel controller) */ 82 }; 83 84 /* 85 * VIA SouthBridge chips. 86 */ 87 88 static const struct via_isa_bridge { 89 const char *name; 90 u16 id; 91 u8 rev_min; 92 u8 rev_max; 93 u8 udma_mask; 94 u8 flags; 95 } via_isa_bridges[] = { 96 { "vx855", PCI_DEVICE_ID_VIA_VX855, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA }, 97 { "vx800", PCI_DEVICE_ID_VIA_VX800, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA }, 98 { "vt8261", PCI_DEVICE_ID_VIA_8261, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 99 { "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 100 { "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 101 { "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA }, 102 { "vt6410", PCI_DEVICE_ID_VIA_6410, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_NO_ENABLES }, 103 { "vt6415", PCI_DEVICE_ID_VIA_6415, 0x00, 0xff, ATA_UDMA6, VIA_BAD_AST | VIA_NO_ENABLES }, 104 { "vt8237a", PCI_DEVICE_ID_VIA_8237A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 105 { "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 106 { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 107 { "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 108 { "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, ATA_UDMA5, }, 109 { "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, ATA_UDMA5, }, 110 { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, ATA_UDMA5, }, 111 { "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, ATA_UDMA5, }, 112 { "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, ATA_UDMA4, }, 113 { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 }, 114 { "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, ATA_UDMA4, }, 115 { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 }, 116 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO }, 117 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ }, 118 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO }, 119 { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO }, 120 { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, 0x00, VIA_SET_FIFO }, 121 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK }, 122 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID }, 123 { "vtxxxx", PCI_DEVICE_ID_VIA_ANON, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST }, 124 { NULL } 125 }; 126 127 static const struct dmi_system_id no_atapi_dma_dmi_table[] = { 128 { 129 .ident = "AVERATEC 3200", 130 .matches = { 131 DMI_MATCH(DMI_BOARD_VENDOR, "AVERATEC"), 132 DMI_MATCH(DMI_BOARD_NAME, "3200"), 133 }, 134 }, 135 { } 136 }; 137 138 struct via_port { 139 u8 cached_device; 140 }; 141 142 /* 143 * Cable special cases 144 */ 145 146 static const struct dmi_system_id cable_dmi_table[] = { 147 { 148 .ident = "Acer Ferrari 3400", 149 .matches = { 150 DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."), 151 DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"), 152 }, 153 }, 154 { } 155 }; 156 157 static int via_cable_override(struct pci_dev *pdev) 158 { 159 /* Systems by DMI */ 160 if (dmi_check_system(cable_dmi_table)) 161 return 1; 162 /* Arima W730-K8/Targa Visionary 811/... */ 163 if (pdev->subsystem_vendor == 0x161F && pdev->subsystem_device == 0x2032) 164 return 1; 165 return 0; 166 } 167 168 169 /** 170 * via_cable_detect - cable detection 171 * @ap: ATA port 172 * 173 * Perform cable detection. Actually for the VIA case the BIOS 174 * already did this for us. We read the values provided by the 175 * BIOS. If you are using an 8235 in a non-PC configuration you 176 * may need to update this code. 177 * 178 * Hotplug also impacts on this. 179 */ 180 181 static int via_cable_detect(struct ata_port *ap) { 182 const struct via_isa_bridge *config = ap->host->private_data; 183 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 184 u32 ata66; 185 186 if (via_cable_override(pdev)) 187 return ATA_CBL_PATA40_SHORT; 188 189 if ((config->flags & VIA_SATA_PATA) && ap->port_no == 0) 190 return ATA_CBL_SATA; 191 192 /* Early chips are 40 wire */ 193 if (config->udma_mask < ATA_UDMA4) 194 return ATA_CBL_PATA40; 195 /* UDMA 66 chips have only drive side logic */ 196 else if (config->udma_mask < ATA_UDMA5) 197 return ATA_CBL_PATA_UNK; 198 /* UDMA 100 or later */ 199 pci_read_config_dword(pdev, 0x50, &ata66); 200 /* Check both the drive cable reporting bits, we might not have 201 two drives */ 202 if (ata66 & (0x10100000 >> (16 * ap->port_no))) 203 return ATA_CBL_PATA80; 204 /* Check with ACPI so we can spot BIOS reported SATA bridges */ 205 if (ata_acpi_init_gtm(ap) && 206 ata_acpi_cbl_80wire(ap, ata_acpi_init_gtm(ap))) 207 return ATA_CBL_PATA80; 208 return ATA_CBL_PATA40; 209 } 210 211 static int via_pre_reset(struct ata_link *link, unsigned long deadline) 212 { 213 struct ata_port *ap = link->ap; 214 const struct via_isa_bridge *config = ap->host->private_data; 215 216 if (!(config->flags & VIA_NO_ENABLES)) { 217 static const struct pci_bits via_enable_bits[] = { 218 { 0x40, 1, 0x02, 0x02 }, 219 { 0x40, 1, 0x01, 0x01 } 220 }; 221 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 222 if (!pci_test_config_bits(pdev, &via_enable_bits[ap->port_no])) 223 return -ENOENT; 224 } 225 226 return ata_sff_prereset(link, deadline); 227 } 228 229 230 /** 231 * via_do_set_mode - set transfer mode data 232 * @ap: ATA interface 233 * @adev: ATA device 234 * @mode: ATA mode being programmed 235 * @set_ast: Set to program address setup 236 * @udma_type: UDMA mode/format of registers 237 * 238 * Program the VIA registers for DMA and PIO modes. Uses the ata timing 239 * support in order to compute modes. 240 * 241 * FIXME: Hotplug will require we serialize multiple mode changes 242 * on the two channels. 243 */ 244 245 static void via_do_set_mode(struct ata_port *ap, struct ata_device *adev, 246 int mode, int set_ast, int udma_type) 247 { 248 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 249 struct ata_device *peer = ata_dev_pair(adev); 250 struct ata_timing t, p; 251 const int via_clock = 33333; /* Bus clock in kHz */ 252 const int T = 1000000000 / via_clock; 253 int UT = T; 254 int ut; 255 int offset = 3 - (2*ap->port_no) - adev->devno; 256 257 switch (udma_type) { 258 case ATA_UDMA4: 259 UT = T / 2; break; 260 case ATA_UDMA5: 261 UT = T / 3; break; 262 case ATA_UDMA6: 263 UT = T / 4; break; 264 } 265 266 /* Calculate the timing values we require */ 267 ata_timing_compute(adev, mode, &t, T, UT); 268 269 /* We share 8bit timing so we must merge the constraints */ 270 if (peer) { 271 if (peer->pio_mode) { 272 ata_timing_compute(peer, peer->pio_mode, &p, T, UT); 273 ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT); 274 } 275 } 276 277 /* Address setup is programmable but breaks on UDMA133 setups */ 278 if (set_ast) { 279 u8 setup; /* 2 bits per drive */ 280 int shift = 2 * offset; 281 282 pci_read_config_byte(pdev, 0x4C, &setup); 283 setup &= ~(3 << shift); 284 setup |= (clamp_val(t.setup, 1, 4) - 1) << shift; 285 pci_write_config_byte(pdev, 0x4C, setup); 286 } 287 288 /* Load the PIO mode bits */ 289 pci_write_config_byte(pdev, 0x4F - ap->port_no, 290 ((clamp_val(t.act8b, 1, 16) - 1) << 4) | (clamp_val(t.rec8b, 1, 16) - 1)); 291 pci_write_config_byte(pdev, 0x48 + offset, 292 ((clamp_val(t.active, 1, 16) - 1) << 4) | (clamp_val(t.recover, 1, 16) - 1)); 293 294 /* Load the UDMA bits according to type */ 295 switch (udma_type) { 296 case ATA_UDMA2: 297 default: 298 ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 5) - 2)) : 0x03; 299 break; 300 case ATA_UDMA4: 301 ut = t.udma ? (0xe8 | (clamp_val(t.udma, 2, 9) - 2)) : 0x0f; 302 break; 303 case ATA_UDMA5: 304 ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07; 305 break; 306 case ATA_UDMA6: 307 ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07; 308 break; 309 } 310 311 /* Set UDMA unless device is not UDMA capable */ 312 if (udma_type) { 313 u8 udma_etc; 314 315 pci_read_config_byte(pdev, 0x50 + offset, &udma_etc); 316 317 /* clear transfer mode bit */ 318 udma_etc &= ~0x20; 319 320 if (t.udma) { 321 /* preserve 80-wire cable detection bit */ 322 udma_etc &= 0x10; 323 udma_etc |= ut; 324 } 325 326 pci_write_config_byte(pdev, 0x50 + offset, udma_etc); 327 } 328 } 329 330 static void via_set_piomode(struct ata_port *ap, struct ata_device *adev) 331 { 332 const struct via_isa_bridge *config = ap->host->private_data; 333 int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1; 334 335 via_do_set_mode(ap, adev, adev->pio_mode, set_ast, config->udma_mask); 336 } 337 338 static void via_set_dmamode(struct ata_port *ap, struct ata_device *adev) 339 { 340 const struct via_isa_bridge *config = ap->host->private_data; 341 int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1; 342 343 via_do_set_mode(ap, adev, adev->dma_mode, set_ast, config->udma_mask); 344 } 345 346 /** 347 * via_mode_filter - filter buggy device/mode pairs 348 * @dev: ATA device 349 * @mask: Mode bitmask 350 * 351 * We need to apply some minimal filtering for old controllers and at least 352 * one breed of Transcend SSD. Return the updated mask. 353 */ 354 355 static unsigned int via_mode_filter(struct ata_device *dev, unsigned int mask) 356 { 357 struct ata_host *host = dev->link->ap->host; 358 const struct via_isa_bridge *config = host->private_data; 359 unsigned char model_num[ATA_ID_PROD_LEN + 1]; 360 361 if (config->id == PCI_DEVICE_ID_VIA_82C586_0) { 362 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 363 if (strcmp(model_num, "TS64GSSD25-M") == 0) { 364 ata_dev_warn(dev, 365 "disabling UDMA mode due to reported lockups with this device\n"); 366 mask &= ~ ATA_MASK_UDMA; 367 } 368 } 369 370 if (dev->class == ATA_DEV_ATAPI && 371 dmi_check_system(no_atapi_dma_dmi_table)) { 372 ata_dev_warn(dev, "controller locks up on ATAPI DMA, forcing PIO\n"); 373 mask &= ATA_MASK_PIO; 374 } 375 376 return mask; 377 } 378 379 /** 380 * via_tf_load - send taskfile registers to host controller 381 * @ap: Port to which output is sent 382 * @tf: ATA taskfile register set 383 * 384 * Outputs ATA taskfile to standard ATA host controller. 385 * 386 * Note: This is to fix the internal bug of via chipsets, which 387 * will reset the device register after changing the IEN bit on 388 * ctl register 389 */ 390 static void via_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) 391 { 392 struct ata_ioports *ioaddr = &ap->ioaddr; 393 struct via_port *vp = ap->private_data; 394 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; 395 int newctl = 0; 396 397 if (tf->ctl != ap->last_ctl) { 398 iowrite8(tf->ctl, ioaddr->ctl_addr); 399 ap->last_ctl = tf->ctl; 400 ata_wait_idle(ap); 401 newctl = 1; 402 } 403 404 if (tf->flags & ATA_TFLAG_DEVICE) { 405 iowrite8(tf->device, ioaddr->device_addr); 406 vp->cached_device = tf->device; 407 } else if (newctl) 408 iowrite8(vp->cached_device, ioaddr->device_addr); 409 410 if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { 411 WARN_ON_ONCE(!ioaddr->ctl_addr); 412 iowrite8(tf->hob_feature, ioaddr->feature_addr); 413 iowrite8(tf->hob_nsect, ioaddr->nsect_addr); 414 iowrite8(tf->hob_lbal, ioaddr->lbal_addr); 415 iowrite8(tf->hob_lbam, ioaddr->lbam_addr); 416 iowrite8(tf->hob_lbah, ioaddr->lbah_addr); 417 } 418 419 if (is_addr) { 420 iowrite8(tf->feature, ioaddr->feature_addr); 421 iowrite8(tf->nsect, ioaddr->nsect_addr); 422 iowrite8(tf->lbal, ioaddr->lbal_addr); 423 iowrite8(tf->lbam, ioaddr->lbam_addr); 424 iowrite8(tf->lbah, ioaddr->lbah_addr); 425 } 426 427 ata_wait_idle(ap); 428 } 429 430 static int via_port_start(struct ata_port *ap) 431 { 432 struct via_port *vp; 433 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 434 435 int ret = ata_bmdma_port_start(ap); 436 if (ret < 0) 437 return ret; 438 439 vp = devm_kzalloc(&pdev->dev, sizeof(struct via_port), GFP_KERNEL); 440 if (vp == NULL) 441 return -ENOMEM; 442 ap->private_data = vp; 443 return 0; 444 } 445 446 static const struct scsi_host_template via_sht = { 447 ATA_BMDMA_SHT(DRV_NAME), 448 }; 449 450 static struct ata_port_operations via_port_ops = { 451 .inherits = &ata_bmdma_port_ops, 452 .cable_detect = via_cable_detect, 453 .set_piomode = via_set_piomode, 454 .set_dmamode = via_set_dmamode, 455 .prereset = via_pre_reset, 456 .sff_tf_load = via_tf_load, 457 .port_start = via_port_start, 458 .mode_filter = via_mode_filter, 459 }; 460 461 static struct ata_port_operations via_port_ops_noirq = { 462 .inherits = &via_port_ops, 463 .sff_data_xfer = ata_sff_data_xfer32, 464 }; 465 466 /** 467 * via_config_fifo - set up the FIFO 468 * @pdev: PCI device 469 * @flags: configuration flags 470 * 471 * Set the FIFO properties for this device if necessary. Used both on 472 * set up and on and the resume path 473 */ 474 475 static void via_config_fifo(struct pci_dev *pdev, unsigned int flags) 476 { 477 u8 enable; 478 479 /* 0x40 low bits indicate enabled channels */ 480 pci_read_config_byte(pdev, 0x40 , &enable); 481 enable &= 3; 482 483 if (flags & VIA_SET_FIFO) { 484 static const u8 fifo_setting[4] = {0x00, 0x60, 0x00, 0x20}; 485 u8 fifo; 486 487 pci_read_config_byte(pdev, 0x43, &fifo); 488 489 /* Clear PREQ# until DDACK# for errata */ 490 if (flags & VIA_BAD_PREQ) 491 fifo &= 0x7F; 492 else 493 fifo &= 0x9f; 494 /* Turn on FIFO for enabled channels */ 495 fifo |= fifo_setting[enable]; 496 pci_write_config_byte(pdev, 0x43, fifo); 497 } 498 } 499 500 static void via_fixup(struct pci_dev *pdev, const struct via_isa_bridge *config) 501 { 502 u32 timing; 503 504 /* Initialise the FIFO for the enabled channels. */ 505 via_config_fifo(pdev, config->flags); 506 507 if (config->udma_mask == ATA_UDMA4) { 508 /* The 66 MHz devices require we enable the clock */ 509 pci_read_config_dword(pdev, 0x50, &timing); 510 timing |= 0x80008; 511 pci_write_config_dword(pdev, 0x50, timing); 512 } 513 if (config->flags & VIA_BAD_CLK66) { 514 /* Disable the 66MHz clock on problem devices */ 515 pci_read_config_dword(pdev, 0x50, &timing); 516 timing &= ~0x80008; 517 pci_write_config_dword(pdev, 0x50, timing); 518 } 519 } 520 521 /** 522 * via_init_one - discovery callback 523 * @pdev: PCI device 524 * @id: PCI table info 525 * 526 * A VIA IDE interface has been discovered. Figure out what revision 527 * and perform configuration work before handing it to the ATA layer 528 */ 529 530 static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id) 531 { 532 /* Early VIA without UDMA support */ 533 static const struct ata_port_info via_mwdma_info = { 534 .flags = ATA_FLAG_SLAVE_POSS, 535 .pio_mask = ATA_PIO4, 536 .mwdma_mask = ATA_MWDMA2, 537 .port_ops = &via_port_ops 538 }; 539 /* Ditto with IRQ masking required */ 540 static const struct ata_port_info via_mwdma_info_borked = { 541 .flags = ATA_FLAG_SLAVE_POSS, 542 .pio_mask = ATA_PIO4, 543 .mwdma_mask = ATA_MWDMA2, 544 .port_ops = &via_port_ops_noirq, 545 }; 546 /* VIA UDMA 33 devices (and borked 66) */ 547 static const struct ata_port_info via_udma33_info = { 548 .flags = ATA_FLAG_SLAVE_POSS, 549 .pio_mask = ATA_PIO4, 550 .mwdma_mask = ATA_MWDMA2, 551 .udma_mask = ATA_UDMA2, 552 .port_ops = &via_port_ops 553 }; 554 /* VIA UDMA 66 devices */ 555 static const struct ata_port_info via_udma66_info = { 556 .flags = ATA_FLAG_SLAVE_POSS, 557 .pio_mask = ATA_PIO4, 558 .mwdma_mask = ATA_MWDMA2, 559 .udma_mask = ATA_UDMA4, 560 .port_ops = &via_port_ops 561 }; 562 /* VIA UDMA 100 devices */ 563 static const struct ata_port_info via_udma100_info = { 564 .flags = ATA_FLAG_SLAVE_POSS, 565 .pio_mask = ATA_PIO4, 566 .mwdma_mask = ATA_MWDMA2, 567 .udma_mask = ATA_UDMA5, 568 .port_ops = &via_port_ops 569 }; 570 /* UDMA133 with bad AST (All current 133) */ 571 static const struct ata_port_info via_udma133_info = { 572 .flags = ATA_FLAG_SLAVE_POSS, 573 .pio_mask = ATA_PIO4, 574 .mwdma_mask = ATA_MWDMA2, 575 .udma_mask = ATA_UDMA6, /* FIXME: should check north bridge */ 576 .port_ops = &via_port_ops 577 }; 578 const struct ata_port_info *ppi[] = { NULL, NULL }; 579 struct pci_dev *isa; 580 const struct via_isa_bridge *config; 581 u8 enable; 582 unsigned long flags = id->driver_data; 583 int rc; 584 585 ata_print_version_once(&pdev->dev, DRV_VERSION); 586 587 rc = pcim_enable_device(pdev); 588 if (rc) 589 return rc; 590 591 if (flags & VIA_IDFLAG_SINGLE) 592 ppi[1] = &ata_dummy_port_info; 593 594 /* To find out how the IDE will behave and what features we 595 actually have to look at the bridge not the IDE controller */ 596 for (config = via_isa_bridges; config->id != PCI_DEVICE_ID_VIA_ANON; 597 config++) 598 if ((isa = pci_get_device(PCI_VENDOR_ID_VIA + 599 !!(config->flags & VIA_BAD_ID), 600 config->id, NULL))) { 601 u8 rev = isa->revision; 602 pci_dev_put(isa); 603 604 if ((id->device == 0x0415 || id->device == 0x3164) && 605 (config->id != id->device)) 606 continue; 607 608 if (rev >= config->rev_min && rev <= config->rev_max) 609 break; 610 } 611 612 if (!(config->flags & VIA_NO_ENABLES)) { 613 /* 0x40 low bits indicate enabled channels */ 614 pci_read_config_byte(pdev, 0x40 , &enable); 615 enable &= 3; 616 if (enable == 0) 617 return -ENODEV; 618 } 619 620 /* Clock set up */ 621 switch (config->udma_mask) { 622 case 0x00: 623 if (config->flags & VIA_NO_UNMASK) 624 ppi[0] = &via_mwdma_info_borked; 625 else 626 ppi[0] = &via_mwdma_info; 627 break; 628 case ATA_UDMA2: 629 ppi[0] = &via_udma33_info; 630 break; 631 case ATA_UDMA4: 632 ppi[0] = &via_udma66_info; 633 break; 634 case ATA_UDMA5: 635 ppi[0] = &via_udma100_info; 636 break; 637 case ATA_UDMA6: 638 ppi[0] = &via_udma133_info; 639 break; 640 default: 641 WARN_ON(1); 642 return -ENODEV; 643 } 644 645 via_fixup(pdev, config); 646 647 /* We have established the device type, now fire it up */ 648 return ata_pci_bmdma_init_one(pdev, ppi, &via_sht, (void *)config, 0); 649 } 650 651 #ifdef CONFIG_PM_SLEEP 652 /** 653 * via_reinit_one - reinit after resume 654 * @pdev: PCI device 655 * 656 * Called when the VIA PATA device is resumed. We must then 657 * reconfigure the fifo and other setup we may have altered. In 658 * addition the kernel needs to have the resume methods on PCI 659 * quirk supported. 660 */ 661 662 static int via_reinit_one(struct pci_dev *pdev) 663 { 664 struct ata_host *host = pci_get_drvdata(pdev); 665 int rc; 666 667 rc = ata_pci_device_do_resume(pdev); 668 if (rc) 669 return rc; 670 671 via_fixup(pdev, host->private_data); 672 673 ata_host_resume(host); 674 return 0; 675 } 676 #endif 677 678 static const struct pci_device_id via[] = { 679 { PCI_VDEVICE(VIA, 0x0415), }, 680 { PCI_VDEVICE(VIA, 0x0571), }, 681 { PCI_VDEVICE(VIA, 0x0581), }, 682 { PCI_VDEVICE(VIA, 0x1571), }, 683 { PCI_VDEVICE(VIA, 0x3164), }, 684 { PCI_VDEVICE(VIA, 0x5324), }, 685 { PCI_VDEVICE(VIA, 0xC409), VIA_IDFLAG_SINGLE }, 686 { PCI_VDEVICE(VIA, 0x9001), VIA_IDFLAG_SINGLE }, 687 688 { }, 689 }; 690 691 static struct pci_driver via_pci_driver = { 692 .name = DRV_NAME, 693 .id_table = via, 694 .probe = via_init_one, 695 .remove = ata_pci_remove_one, 696 #ifdef CONFIG_PM_SLEEP 697 .suspend = ata_pci_device_suspend, 698 .resume = via_reinit_one, 699 #endif 700 }; 701 702 module_pci_driver(via_pci_driver); 703 704 MODULE_AUTHOR("Alan Cox"); 705 MODULE_DESCRIPTION("low-level driver for VIA PATA"); 706 MODULE_LICENSE("GPL"); 707 MODULE_DEVICE_TABLE(pci, via); 708 MODULE_VERSION(DRV_VERSION); 709