1/* 2 * pata_it821x.c - IT821x PATA for new ATA layer 3 * (C) 2005 Red Hat Inc 4 * Alan Cox <alan@redhat.com> 5 * (C) 2007 Bartlomiej Zolnierkiewicz 6 * 7 * based upon 8 * 9 * it821x.c 10 * 11 * linux/drivers/ide/pci/it821x.c Version 0.09 December 2004 12 * 13 * Copyright (C) 2004 Red Hat <alan@redhat.com> 14 * 15 * May be copied or modified under the terms of the GNU General Public License 16 * Based in part on the ITE vendor provided SCSI driver. 17 * 18 * Documentation available from 19 * http://www.ite.com.tw/pc/IT8212F_V04.pdf 20 * Some other documents are NDA. 21 * 22 * The ITE8212 isn't exactly a standard IDE controller. It has two 23 * modes. In pass through mode then it is an IDE controller. In its smart 24 * mode its actually quite a capable hardware raid controller disguised 25 * as an IDE controller. Smart mode only understands DMA read/write and 26 * identify, none of the fancier commands apply. The IT8211 is identical 27 * in other respects but lacks the raid mode. 28 * 29 * Errata: 30 * o Rev 0x10 also requires master/slave hold the same DMA timings and 31 * cannot do ATAPI MWDMA. 32 * o The identify data for raid volumes lacks CHS info (technically ok) 33 * but also fails to set the LBA28 and other bits. We fix these in 34 * the IDE probe quirk code. 35 * o If you write LBA48 sized I/O's (ie > 256 sector) in smart mode 36 * raid then the controller firmware dies 37 * o Smart mode without RAID doesn't clear all the necessary identify 38 * bits to reduce the command set to the one used 39 * 40 * This has a few impacts on the driver 41 * - In pass through mode we do all the work you would expect 42 * - In smart mode the clocking set up is done by the controller generally 43 * but we must watch the other limits and filter. 44 * - There are a few extra vendor commands that actually talk to the 45 * controller but only work PIO with no IRQ. 46 * 47 * Vendor areas of the identify block in smart mode are used for the 48 * timing and policy set up. Each HDD in raid mode also has a serial 49 * block on the disk. The hardware extra commands are get/set chip status, 50 * rebuild, get rebuild status. 51 * 52 * In Linux the driver supports pass through mode as if the device was 53 * just another IDE controller. If the smart mode is running then 54 * volumes are managed by the controller firmware and each IDE "disk" 55 * is a raid volume. Even more cute - the controller can do automated 56 * hotplug and rebuild. 57 * 58 * The pass through controller itself is a little demented. It has a 59 * flaw that it has a single set of PIO/MWDMA timings per channel so 60 * non UDMA devices restrict each others performance. It also has a 61 * single clock source per channel so mixed UDMA100/133 performance 62 * isn't perfect and we have to pick a clock. Thankfully none of this 63 * matters in smart mode. ATAPI DMA is not currently supported. 64 * 65 * It seems the smart mode is a win for RAID1/RAID10 but otherwise not. 66 * 67 * TODO 68 * - ATAPI and other speed filtering 69 * - RAID configuration ioctls 70 */ 71 72#include <linux/kernel.h> 73#include <linux/module.h> 74#include <linux/pci.h> 75#include <linux/init.h> 76#include <linux/blkdev.h> 77#include <linux/delay.h> 78#include <scsi/scsi_host.h> 79#include <linux/libata.h> 80 81 82#define DRV_NAME "pata_it821x" 83#define DRV_VERSION "0.3.7" 84 85struct it821x_dev 86{ 87 unsigned int smart:1, /* Are we in smart raid mode */ 88 timing10:1; /* Rev 0x10 */ 89 u8 clock_mode; /* 0, ATA_50 or ATA_66 */ 90 u8 want[2][2]; /* Mode/Pri log for master slave */ 91 /* We need these for switching the clock when DMA goes on/off 92 The high byte is the 66Mhz timing */ 93 u16 pio[2]; /* Cached PIO values */ 94 u16 mwdma[2]; /* Cached MWDMA values */ 95 u16 udma[2]; /* Cached UDMA values (per drive) */ 96 u16 last_device; /* Master or slave loaded ? */ 97}; 98 99#define ATA_66 0 100#define ATA_50 1 101#define ATA_ANY 2 102 103#define UDMA_OFF 0 104#define MWDMA_OFF 0 105 106/* 107 * We allow users to force the card into non raid mode without 108 * flashing the alternative BIOS. This is also neccessary right now 109 * for embedded platforms that cannot run a PC BIOS but are using this 110 * device. 111 */ 112 113static int it8212_noraid; 114 115/** 116 * it821x_program - program the PIO/MWDMA registers 117 * @ap: ATA port 118 * @adev: Device to program 119 * @timing: Timing value (66Mhz in top 8bits, 50 in the low 8) 120 * 121 * Program the PIO/MWDMA timing for this channel according to the 122 * current clock. These share the same register so are managed by 123 * the DMA start/stop sequence as with the old driver. 124 */ 125 126static void it821x_program(struct ata_port *ap, struct ata_device *adev, u16 timing) 127{ 128 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 129 struct it821x_dev *itdev = ap->private_data; 130 int channel = ap->port_no; 131 u8 conf; 132 133 /* Program PIO/MWDMA timing bits */ 134 if (itdev->clock_mode == ATA_66) 135 conf = timing >> 8; 136 else 137 conf = timing & 0xFF; 138 pci_write_config_byte(pdev, 0x54 + 4 * channel, conf); 139} 140 141 142/** 143 * it821x_program_udma - program the UDMA registers 144 * @ap: ATA port 145 * @adev: ATA device to update 146 * @timing: Timing bits. Top 8 are for 66Mhz bottom for 50Mhz 147 * 148 * Program the UDMA timing for this drive according to the 149 * current clock. Handles the dual clocks and also knows about 150 * the errata on the 0x10 revision. The UDMA errata is partly handled 151 * here and partly in start_dma. 152 */ 153 154static void it821x_program_udma(struct ata_port *ap, struct ata_device *adev, u16 timing) 155{ 156 struct it821x_dev *itdev = ap->private_data; 157 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 158 int channel = ap->port_no; 159 int unit = adev->devno; 160 u8 conf; 161 162 /* Program UDMA timing bits */ 163 if (itdev->clock_mode == ATA_66) 164 conf = timing >> 8; 165 else 166 conf = timing & 0xFF; 167 if (itdev->timing10 == 0) 168 pci_write_config_byte(pdev, 0x56 + 4 * channel + unit, conf); 169 else { 170 /* Early revision must be programmed for both together */ 171 pci_write_config_byte(pdev, 0x56 + 4 * channel, conf); 172 pci_write_config_byte(pdev, 0x56 + 4 * channel + 1, conf); 173 } 174} 175 176/** 177 * it821x_clock_strategy 178 * @ap: ATA interface 179 * @adev: ATA device being updated 180 * 181 * Select between the 50 and 66Mhz base clocks to get the best 182 * results for this interface. 183 */ 184 185static void it821x_clock_strategy(struct ata_port *ap, struct ata_device *adev) 186{ 187 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 188 struct it821x_dev *itdev = ap->private_data; 189 u8 unit = adev->devno; 190 struct ata_device *pair = ata_dev_pair(adev); 191 192 int clock, altclock; 193 u8 v; 194 int sel = 0; 195 196 /* Look for the most wanted clocking */ 197 if (itdev->want[0][0] > itdev->want[1][0]) { 198 clock = itdev->want[0][1]; 199 altclock = itdev->want[1][1]; 200 } else { 201 clock = itdev->want[1][1]; 202 altclock = itdev->want[0][1]; 203 } 204 205 /* Master doesn't care does the slave ? */ 206 if (clock == ATA_ANY) 207 clock = altclock; 208 209 /* Nobody cares - keep the same clock */ 210 if (clock == ATA_ANY) 211 return; 212 /* No change */ 213 if (clock == itdev->clock_mode) 214 return; 215 216 /* Load this into the controller */ 217 if (clock == ATA_66) 218 itdev->clock_mode = ATA_66; 219 else { 220 itdev->clock_mode = ATA_50; 221 sel = 1; 222 } 223 pci_read_config_byte(pdev, 0x50, &v); 224 v &= ~(1 << (1 + ap->port_no)); 225 v |= sel << (1 + ap->port_no); 226 pci_write_config_byte(pdev, 0x50, v); 227 228 /* 229 * Reprogram the UDMA/PIO of the pair drive for the switch 230 * MWDMA will be dealt with by the dma switcher 231 */ 232 if (pair && itdev->udma[1-unit] != UDMA_OFF) { 233 it821x_program_udma(ap, pair, itdev->udma[1-unit]); 234 it821x_program(ap, pair, itdev->pio[1-unit]); 235 } 236 /* 237 * Reprogram the UDMA/PIO of our drive for the switch. 238 * MWDMA will be dealt with by the dma switcher 239 */ 240 if (itdev->udma[unit] != UDMA_OFF) { 241 it821x_program_udma(ap, adev, itdev->udma[unit]); 242 it821x_program(ap, adev, itdev->pio[unit]); 243 } 244} 245 246/** 247 * it821x_passthru_set_piomode - set PIO mode data 248 * @ap: ATA interface 249 * @adev: ATA device 250 * 251 * Configure for PIO mode. This is complicated as the register is 252 * shared by PIO and MWDMA and for both channels. 253 */ 254 255static void it821x_passthru_set_piomode(struct ata_port *ap, struct ata_device *adev) 256{ 257 /* Spec says 89 ref driver uses 88 */ 258 static const u16 pio[] = { 0xAA88, 0xA382, 0xA181, 0x3332, 0x3121 }; 259 static const u8 pio_want[] = { ATA_66, ATA_66, ATA_66, ATA_66, ATA_ANY }; 260 261 struct it821x_dev *itdev = ap->private_data; 262 int unit = adev->devno; 263 int mode_wanted = adev->pio_mode - XFER_PIO_0; 264 265 /* We prefer 66Mhz clock for PIO 0-3, don't care for PIO4 */ 266 itdev->want[unit][1] = pio_want[mode_wanted]; 267 itdev->want[unit][0] = 1; /* PIO is lowest priority */ 268 itdev->pio[unit] = pio[mode_wanted]; 269 it821x_clock_strategy(ap, adev); 270 it821x_program(ap, adev, itdev->pio[unit]); 271} 272 273/** 274 * it821x_passthru_set_dmamode - set initial DMA mode data 275 * @ap: ATA interface 276 * @adev: ATA device 277 * 278 * Set up the DMA modes. The actions taken depend heavily on the mode 279 * to use. If UDMA is used as is hopefully the usual case then the 280 * timing register is private and we need only consider the clock. If 281 * we are using MWDMA then we have to manage the setting ourself as 282 * we switch devices and mode. 283 */ 284 285static void it821x_passthru_set_dmamode(struct ata_port *ap, struct ata_device *adev) 286{ 287 static const u16 dma[] = { 0x8866, 0x3222, 0x3121 }; 288 static const u8 mwdma_want[] = { ATA_ANY, ATA_66, ATA_ANY }; 289 static const u16 udma[] = { 0x4433, 0x4231, 0x3121, 0x2121, 0x1111, 0x2211, 0x1111 }; 290 static const u8 udma_want[] = { ATA_ANY, ATA_50, ATA_ANY, ATA_66, ATA_66, ATA_50, ATA_66 }; 291 292 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 293 struct it821x_dev *itdev = ap->private_data; 294 int channel = ap->port_no; 295 int unit = adev->devno; 296 u8 conf; 297 298 if (adev->dma_mode >= XFER_UDMA_0) { 299 int mode_wanted = adev->dma_mode - XFER_UDMA_0; 300 301 itdev->want[unit][1] = udma_want[mode_wanted]; 302 itdev->want[unit][0] = 3; /* UDMA is high priority */ 303 itdev->mwdma[unit] = MWDMA_OFF; 304 itdev->udma[unit] = udma[mode_wanted]; 305 if (mode_wanted >= 5) 306 itdev->udma[unit] |= 0x8080; /* UDMA 5/6 select on */ 307 308 /* UDMA on. Again revision 0x10 must do the pair */ 309 pci_read_config_byte(pdev, 0x50, &conf); 310 if (itdev->timing10) 311 conf &= channel ? 0x9F: 0xE7; 312 else 313 conf &= ~ (1 << (3 + 2 * channel + unit)); 314 pci_write_config_byte(pdev, 0x50, conf); 315 it821x_clock_strategy(ap, adev); 316 it821x_program_udma(ap, adev, itdev->udma[unit]); 317 } else { 318 int mode_wanted = adev->dma_mode - XFER_MW_DMA_0; 319 320 itdev->want[unit][1] = mwdma_want[mode_wanted]; 321 itdev->want[unit][0] = 2; /* MWDMA is low priority */ 322 itdev->mwdma[unit] = dma[mode_wanted]; 323 itdev->udma[unit] = UDMA_OFF; 324 325 /* UDMA bits off - Revision 0x10 do them in pairs */ 326 pci_read_config_byte(pdev, 0x50, &conf); 327 if (itdev->timing10) 328 conf |= channel ? 0x60: 0x18; 329 else 330 conf |= 1 << (3 + 2 * channel + unit); 331 pci_write_config_byte(pdev, 0x50, conf); 332 it821x_clock_strategy(ap, adev); 333 } 334} 335 336/** 337 * it821x_passthru_dma_start - DMA start callback 338 * @qc: Command in progress 339 * 340 * Usually drivers set the DMA timing at the point the set_dmamode call 341 * is made. IT821x however requires we load new timings on the 342 * transitions in some cases. 343 */ 344 345static void it821x_passthru_bmdma_start(struct ata_queued_cmd *qc) 346{ 347 struct ata_port *ap = qc->ap; 348 struct ata_device *adev = qc->dev; 349 struct it821x_dev *itdev = ap->private_data; 350 int unit = adev->devno; 351 352 if (itdev->mwdma[unit] != MWDMA_OFF) 353 it821x_program(ap, adev, itdev->mwdma[unit]); 354 else if (itdev->udma[unit] != UDMA_OFF && itdev->timing10) 355 it821x_program_udma(ap, adev, itdev->udma[unit]); 356 ata_bmdma_start(qc); 357} 358 359/** 360 * it821x_passthru_dma_stop - DMA stop callback 361 * @qc: ATA command 362 * 363 * We loaded new timings in dma_start, as a result we need to restore 364 * the PIO timings in dma_stop so that the next command issue gets the 365 * right clock values. 366 */ 367 368static void it821x_passthru_bmdma_stop(struct ata_queued_cmd *qc) 369{ 370 struct ata_port *ap = qc->ap; 371 struct ata_device *adev = qc->dev; 372 struct it821x_dev *itdev = ap->private_data; 373 int unit = adev->devno; 374 375 ata_bmdma_stop(qc); 376 if (itdev->mwdma[unit] != MWDMA_OFF) 377 it821x_program(ap, adev, itdev->pio[unit]); 378} 379 380 381/** 382 * it821x_passthru_dev_select - Select master/slave 383 * @ap: ATA port 384 * @device: Device number (not pointer) 385 * 386 * Device selection hook. If neccessary perform clock switching 387 */ 388 389static void it821x_passthru_dev_select(struct ata_port *ap, 390 unsigned int device) 391{ 392 struct it821x_dev *itdev = ap->private_data; 393 if (itdev && device != itdev->last_device) { 394 struct ata_device *adev = &ap->device[device]; 395 it821x_program(ap, adev, itdev->pio[adev->devno]); 396 itdev->last_device = device; 397 } 398 ata_std_dev_select(ap, device); 399} 400 401/** 402 * it821x_smart_qc_issue_prot - wrap qc issue prot 403 * @qc: command 404 * 405 * Wrap the command issue sequence for the IT821x. We need to 406 * perform out own device selection timing loads before the 407 * usual happenings kick off 408 */ 409 410static unsigned int it821x_smart_qc_issue_prot(struct ata_queued_cmd *qc) 411{ 412 switch(qc->tf.command) 413 { 414 /* Commands the firmware supports */ 415 case ATA_CMD_READ: 416 case ATA_CMD_READ_EXT: 417 case ATA_CMD_WRITE: 418 case ATA_CMD_WRITE_EXT: 419 case ATA_CMD_PIO_READ: 420 case ATA_CMD_PIO_READ_EXT: 421 case ATA_CMD_PIO_WRITE: 422 case ATA_CMD_PIO_WRITE_EXT: 423 case ATA_CMD_READ_MULTI: 424 case ATA_CMD_READ_MULTI_EXT: 425 case ATA_CMD_WRITE_MULTI: 426 case ATA_CMD_WRITE_MULTI_EXT: 427 case ATA_CMD_ID_ATA: 428 /* Arguably should just no-op this one */ 429 case ATA_CMD_SET_FEATURES: 430 return ata_qc_issue_prot(qc); 431 } 432 printk(KERN_DEBUG "it821x: can't process command 0x%02X\n", qc->tf.command); 433 return AC_ERR_INVALID; 434} 435 436/** 437 * it821x_passthru_qc_issue_prot - wrap qc issue prot 438 * @qc: command 439 * 440 * Wrap the command issue sequence for the IT821x. We need to 441 * perform out own device selection timing loads before the 442 * usual happenings kick off 443 */ 444 445static unsigned int it821x_passthru_qc_issue_prot(struct ata_queued_cmd *qc) 446{ 447 it821x_passthru_dev_select(qc->ap, qc->dev->devno); 448 return ata_qc_issue_prot(qc); 449} 450 451/** 452 * it821x_smart_set_mode - mode setting 453 * @ap: interface to set up 454 * @unused: device that failed (error only) 455 * 456 * Use a non standard set_mode function. We don't want to be tuned. 457 * The BIOS configured everything. Our job is not to fiddle. We 458 * read the dma enabled bits from the PCI configuration of the device 459 * and respect them. 460 */ 461 462static int it821x_smart_set_mode(struct ata_port *ap, struct ata_device **unused) 463{ 464 int i; 465 466 for (i = 0; i < ATA_MAX_DEVICES; i++) { 467 struct ata_device *dev = &ap->device[i]; 468 if (ata_dev_enabled(dev)) { 469 /* We don't really care */ 470 dev->pio_mode = XFER_PIO_0; 471 dev->dma_mode = XFER_MW_DMA_0; 472 /* We do need the right mode information for DMA or PIO 473 and this comes from the current configuration flags */ 474 if (ata_id_has_dma(dev->id)) { 475 ata_dev_printk(dev, KERN_INFO, "configured for DMA\n"); 476 dev->xfer_mode = XFER_MW_DMA_0; 477 dev->xfer_shift = ATA_SHIFT_MWDMA; 478 dev->flags &= ~ATA_DFLAG_PIO; 479 } else { 480 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n"); 481 dev->xfer_mode = XFER_PIO_0; 482 dev->xfer_shift = ATA_SHIFT_PIO; 483 dev->flags |= ATA_DFLAG_PIO; 484 } 485 } 486 } 487 return 0; 488} 489 490 491static void it821x_dev_config(struct ata_device *adev) 492{ 493 unsigned char model_num[ATA_ID_PROD_LEN + 1]; 494 495 ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 496 497 if (adev->max_sectors > 255) 498 adev->max_sectors = 255; 499 500 if (strstr(model_num, "Integrated Technology Express")) { 501 /* RAID mode */ 502 printk(KERN_INFO "IT821x %sRAID%d volume", 503 adev->id[147]?"Bootable ":"", 504 adev->id[129]); 505 if (adev->id[129] != 1) 506 printk("(%dK stripe)", adev->id[146]); 507 printk(".\n"); 508 } 509} 510 511 512/** 513 * it821x_check_atapi_dma - ATAPI DMA handler 514 * @qc: Command we are about to issue 515 * 516 * Decide if this ATAPI command can be issued by DMA on this 517 * controller. Return 0 if it can be. 518 */ 519 520static int it821x_check_atapi_dma(struct ata_queued_cmd *qc) 521{ 522 struct ata_port *ap = qc->ap; 523 struct it821x_dev *itdev = ap->private_data; 524 525 /* No ATAPI DMA in smart mode */ 526 if (itdev->smart) 527 return -EOPNOTSUPP; 528 /* No ATAPI DMA on rev 10 */ 529 if (itdev->timing10) 530 return -EOPNOTSUPP; 531 /* Cool */ 532 return 0; 533} 534 535 536/** 537 * it821x_port_start - port setup 538 * @ap: ATA port being set up 539 * 540 * The it821x needs to maintain private data structures and also to 541 * use the standard PCI interface which lacks support for this 542 * functionality. We instead set up the private data on the port 543 * start hook, and tear it down on port stop 544 */ 545 546static int it821x_port_start(struct ata_port *ap) 547{ 548 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 549 struct it821x_dev *itdev; 550 u8 conf; 551 552 int ret = ata_port_start(ap); 553 if (ret < 0) 554 return ret; 555 556 itdev = devm_kzalloc(&pdev->dev, sizeof(struct it821x_dev), GFP_KERNEL); 557 if (itdev == NULL) 558 return -ENOMEM; 559 ap->private_data = itdev; 560 561 pci_read_config_byte(pdev, 0x50, &conf); 562 563 if (conf & 1) { 564 itdev->smart = 1; 565 /* Long I/O's although allowed in LBA48 space cause the 566 onboard firmware to enter the twighlight zone */ 567 /* No ATAPI DMA in this mode either */ 568 } 569 /* Pull the current clocks from 0x50 */ 570 if (conf & (1 << (1 + ap->port_no))) 571 itdev->clock_mode = ATA_50; 572 else 573 itdev->clock_mode = ATA_66; 574 575 itdev->want[0][1] = ATA_ANY; 576 itdev->want[1][1] = ATA_ANY; 577 itdev->last_device = -1; 578 579 pci_read_config_byte(pdev, PCI_REVISION_ID, &conf); 580 if (conf == 0x10) { 581 itdev->timing10 = 1; 582 /* Need to disable ATAPI DMA for this case */ 583 if (!itdev->smart) 584 printk(KERN_WARNING DRV_NAME": Revision 0x10, workarounds activated.\n"); 585 } 586 587 return 0; 588} 589 590static struct scsi_host_template it821x_sht = { 591 .module = THIS_MODULE, 592 .name = DRV_NAME, 593 .ioctl = ata_scsi_ioctl, 594 .queuecommand = ata_scsi_queuecmd, 595 .can_queue = ATA_DEF_QUEUE, 596 .this_id = ATA_SHT_THIS_ID, 597 .sg_tablesize = LIBATA_MAX_PRD, 598 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 599 .emulated = ATA_SHT_EMULATED, 600 .use_clustering = ATA_SHT_USE_CLUSTERING, 601 .proc_name = DRV_NAME, 602 .dma_boundary = ATA_DMA_BOUNDARY, 603 .slave_configure = ata_scsi_slave_config, 604 .slave_destroy = ata_scsi_slave_destroy, 605 .bios_param = ata_std_bios_param, 606}; 607 608static struct ata_port_operations it821x_smart_port_ops = { 609 .set_mode = it821x_smart_set_mode, 610 .port_disable = ata_port_disable, 611 .tf_load = ata_tf_load, 612 .tf_read = ata_tf_read, 613 .mode_filter = ata_pci_default_filter, 614 615 .check_status = ata_check_status, 616 .check_atapi_dma= it821x_check_atapi_dma, 617 .exec_command = ata_exec_command, 618 .dev_select = ata_std_dev_select, 619 .dev_config = it821x_dev_config, 620 621 .freeze = ata_bmdma_freeze, 622 .thaw = ata_bmdma_thaw, 623 .error_handler = ata_bmdma_error_handler, 624 .post_internal_cmd = ata_bmdma_post_internal_cmd, 625 .cable_detect = ata_cable_unknown, 626 627 .bmdma_setup = ata_bmdma_setup, 628 .bmdma_start = ata_bmdma_start, 629 .bmdma_stop = ata_bmdma_stop, 630 .bmdma_status = ata_bmdma_status, 631 632 .qc_prep = ata_qc_prep, 633 .qc_issue = it821x_smart_qc_issue_prot, 634 635 .data_xfer = ata_data_xfer, 636 637 .irq_handler = ata_interrupt, 638 .irq_clear = ata_bmdma_irq_clear, 639 .irq_on = ata_irq_on, 640 .irq_ack = ata_irq_ack, 641 642 .port_start = it821x_port_start, 643}; 644 645static struct ata_port_operations it821x_passthru_port_ops = { 646 .port_disable = ata_port_disable, 647 .set_piomode = it821x_passthru_set_piomode, 648 .set_dmamode = it821x_passthru_set_dmamode, 649 .mode_filter = ata_pci_default_filter, 650 651 .tf_load = ata_tf_load, 652 .tf_read = ata_tf_read, 653 .check_status = ata_check_status, 654 .exec_command = ata_exec_command, 655 .check_atapi_dma= it821x_check_atapi_dma, 656 .dev_select = it821x_passthru_dev_select, 657 658 .freeze = ata_bmdma_freeze, 659 .thaw = ata_bmdma_thaw, 660 .error_handler = ata_bmdma_error_handler, 661 .post_internal_cmd = ata_bmdma_post_internal_cmd, 662 .cable_detect = ata_cable_unknown, 663 664 .bmdma_setup = ata_bmdma_setup, 665 .bmdma_start = it821x_passthru_bmdma_start, 666 .bmdma_stop = it821x_passthru_bmdma_stop, 667 .bmdma_status = ata_bmdma_status, 668 669 .qc_prep = ata_qc_prep, 670 .qc_issue = it821x_passthru_qc_issue_prot, 671 672 .data_xfer = ata_data_xfer, 673 674 .irq_clear = ata_bmdma_irq_clear, 675 .irq_handler = ata_interrupt, 676 .irq_on = ata_irq_on, 677 .irq_ack = ata_irq_ack, 678 679 .port_start = it821x_port_start, 680}; 681 682static void it821x_disable_raid(struct pci_dev *pdev) 683{ 684 /* Reset local CPU, and set BIOS not ready */ 685 pci_write_config_byte(pdev, 0x5E, 0x01); 686 687 /* Set to bypass mode, and reset PCI bus */ 688 pci_write_config_byte(pdev, 0x50, 0x00); 689 pci_write_config_word(pdev, PCI_COMMAND, 690 PCI_COMMAND_PARITY | PCI_COMMAND_IO | 691 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 692 pci_write_config_word(pdev, 0x40, 0xA0F3); 693 694 pci_write_config_dword(pdev,0x4C, 0x02040204); 695 pci_write_config_byte(pdev, 0x42, 0x36); 696 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x20); 697} 698 699 700static int it821x_init_one(struct pci_dev *pdev, const struct pci_device_id *id) 701{ 702 u8 conf; 703 704 static const struct ata_port_info info_smart = { 705 .sht = &it821x_sht, 706 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, 707 .pio_mask = 0x1f, 708 .mwdma_mask = 0x07, 709 .port_ops = &it821x_smart_port_ops 710 }; 711 static const struct ata_port_info info_passthru = { 712 .sht = &it821x_sht, 713 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, 714 .pio_mask = 0x1f, 715 .mwdma_mask = 0x07, 716 .udma_mask = 0x7f, 717 .port_ops = &it821x_passthru_port_ops 718 }; 719 720 const struct ata_port_info *ppi[] = { NULL, NULL }; 721 static char *mode[2] = { "pass through", "smart" }; 722 723 /* Force the card into bypass mode if so requested */ 724 if (it8212_noraid) { 725 printk(KERN_INFO DRV_NAME ": forcing bypass mode.\n"); 726 it821x_disable_raid(pdev); 727 } 728 pci_read_config_byte(pdev, 0x50, &conf); 729 conf &= 1; 730 731 printk(KERN_INFO DRV_NAME ": controller in %s mode.\n", mode[conf]); 732 if (conf == 0) 733 ppi[0] = &info_passthru; 734 else 735 ppi[0] = &info_smart; 736 737 return ata_pci_init_one(pdev, ppi); 738} 739 740#ifdef CONFIG_PM 741static int it821x_reinit_one(struct pci_dev *pdev) 742{ 743 /* Resume - turn raid back off if need be */ 744 if (it8212_noraid) 745 it821x_disable_raid(pdev); 746 return ata_pci_device_resume(pdev); 747} 748#endif 749 750static const struct pci_device_id it821x[] = { 751 { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8211), }, 752 { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8212), }, 753 754 { }, 755}; 756 757static struct pci_driver it821x_pci_driver = { 758 .name = DRV_NAME, 759 .id_table = it821x, 760 .probe = it821x_init_one, 761 .remove = ata_pci_remove_one, 762#ifdef CONFIG_PM 763 .suspend = ata_pci_device_suspend, 764 .resume = it821x_reinit_one, 765#endif 766}; 767 768static int __init it821x_init(void) 769{ 770 return pci_register_driver(&it821x_pci_driver); 771} 772 773static void __exit it821x_exit(void) 774{ 775 pci_unregister_driver(&it821x_pci_driver); 776} 777 778MODULE_AUTHOR("Alan Cox"); 779MODULE_DESCRIPTION("low-level driver for the IT8211/IT8212 IDE RAID controller"); 780MODULE_LICENSE("GPL"); 781MODULE_DEVICE_TABLE(pci, it821x); 782MODULE_VERSION(DRV_VERSION); 783 784 785module_param_named(noraid, it8212_noraid, int, S_IRUGO); 786MODULE_PARM_DESC(noraid, "Force card into bypass mode"); 787 788module_init(it821x_init); 789module_exit(it821x_exit); 790