1 /* 2 * pata_it821x.c - IT821x PATA for new ATA layer 3 * (C) 2005 Red Hat Inc 4 * Alan Cox <alan@lxorguk.ukuu.org.uk> 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 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 IT8212F_V04.pdf 19 * http://www.ite.com.tw/EN/products_more.aspx?CategoryID=3&ID=5,91 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/blkdev.h> 76 #include <linux/delay.h> 77 #include <linux/slab.h> 78 #include <scsi/scsi_host.h> 79 #include <linux/libata.h> 80 81 82 #define DRV_NAME "pata_it821x" 83 #define DRV_VERSION "0.4.2" 84 85 struct 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 necessary right now 109 * for embedded platforms that cannot run a PC BIOS but are using this 110 * device. 111 */ 112 113 static 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 */ 125 126 static 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 */ 153 154 static 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 */ 184 185 static 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 */ 254 255 static 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 */ 284 285 static 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_bmdma_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 */ 344 345 static 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_bmdma_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 */ 367 368 static 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 necessary perform clock switching 387 */ 388 389 static 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->link.device[device]; 395 it821x_program(ap, adev, itdev->pio[adev->devno]); 396 itdev->last_device = device; 397 } 398 ata_sff_dev_select(ap, device); 399 } 400 401 /** 402 * it821x_smart_qc_issue - 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 */ 409 410 static unsigned int it821x_smart_qc_issue(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 case ATA_CMD_INIT_DEV_PARAMS: 429 case 0xFC: /* Internal 'report rebuild state' */ 430 /* Arguably should just no-op this one */ 431 case ATA_CMD_SET_FEATURES: 432 return ata_bmdma_qc_issue(qc); 433 } 434 ata_dev_dbg(qc->dev, "it821x: can't process command 0x%02X\n", 435 qc->tf.command); 436 return AC_ERR_DEV; 437 } 438 439 /** 440 * it821x_passthru_qc_issue - wrap qc issue prot 441 * @qc: command 442 * 443 * Wrap the command issue sequence for the IT821x. We need to 444 * perform out own device selection timing loads before the 445 * usual happenings kick off 446 */ 447 448 static unsigned int it821x_passthru_qc_issue(struct ata_queued_cmd *qc) 449 { 450 it821x_passthru_dev_select(qc->ap, qc->dev->devno); 451 return ata_bmdma_qc_issue(qc); 452 } 453 454 /** 455 * it821x_smart_set_mode - mode setting 456 * @link: interface to set up 457 * @unused: device that failed (error only) 458 * 459 * Use a non standard set_mode function. We don't want to be tuned. 460 * The BIOS configured everything. Our job is not to fiddle. We 461 * read the dma enabled bits from the PCI configuration of the device 462 * and respect them. 463 */ 464 465 static int it821x_smart_set_mode(struct ata_link *link, struct ata_device **unused) 466 { 467 struct ata_device *dev; 468 469 ata_for_each_dev(dev, link, ENABLED) { 470 /* We don't really care */ 471 dev->pio_mode = XFER_PIO_0; 472 dev->dma_mode = XFER_MW_DMA_0; 473 /* We do need the right mode information for DMA or PIO 474 and this comes from the current configuration flags */ 475 if (ata_id_has_dma(dev->id)) { 476 ata_dev_info(dev, "configured for DMA\n"); 477 dev->xfer_mode = XFER_MW_DMA_0; 478 dev->xfer_shift = ATA_SHIFT_MWDMA; 479 dev->flags &= ~ATA_DFLAG_PIO; 480 } else { 481 ata_dev_info(dev, "configured for PIO\n"); 482 dev->xfer_mode = XFER_PIO_0; 483 dev->xfer_shift = ATA_SHIFT_PIO; 484 dev->flags |= ATA_DFLAG_PIO; 485 } 486 } 487 return 0; 488 } 489 490 /** 491 * it821x_dev_config - Called each device identify 492 * @adev: Device that has just been identified 493 * 494 * Perform the initial setup needed for each device that is chip 495 * special. In our case we need to lock the sector count to avoid 496 * blowing the brains out of the firmware with large LBA48 requests 497 * 498 */ 499 500 static void it821x_dev_config(struct ata_device *adev) 501 { 502 unsigned char model_num[ATA_ID_PROD_LEN + 1]; 503 504 ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 505 506 if (adev->max_sectors > 255) 507 adev->max_sectors = 255; 508 509 if (strstr(model_num, "Integrated Technology Express")) { 510 /* RAID mode */ 511 if (adev->id[129] == 1) 512 ata_dev_info(adev, "%sRAID%d volume\n", 513 adev->id[147] ? "Bootable " : "", 514 adev->id[129]); 515 else 516 ata_dev_info(adev, "%sRAID%d volume (%dK stripe)\n", 517 adev->id[147] ? "Bootable " : "", 518 adev->id[129], adev->id[146]); 519 } 520 /* This is a controller firmware triggered funny, don't 521 report the drive faulty! */ 522 adev->horkage &= ~ATA_HORKAGE_DIAGNOSTIC; 523 /* No HPA in 'smart' mode */ 524 adev->horkage |= ATA_HORKAGE_BROKEN_HPA; 525 } 526 527 /** 528 * it821x_read_id - Hack identify data up 529 * @adev: device to read 530 * @tf: proposed taskfile 531 * @id: buffer for returned ident data 532 * 533 * Query the devices on this firmware driven port and slightly 534 * mash the identify data to stop us and common tools trying to 535 * use features not firmware supported. The firmware itself does 536 * some masking (eg SMART) but not enough. 537 */ 538 539 static unsigned int it821x_read_id(struct ata_device *adev, 540 struct ata_taskfile *tf, __le16 *id) 541 { 542 unsigned int err_mask; 543 unsigned char model_num[ATA_ID_PROD_LEN + 1]; 544 545 err_mask = ata_do_dev_read_id(adev, tf, id); 546 if (err_mask) 547 return err_mask; 548 ata_id_c_string((u16 *)id, model_num, ATA_ID_PROD, sizeof(model_num)); 549 550 id[83] &= cpu_to_le16(~(1 << 12)); /* Cache flush is firmware handled */ 551 id[84] &= cpu_to_le16(~(1 << 6)); /* No FUA */ 552 id[85] &= cpu_to_le16(~(1 << 10)); /* No HPA */ 553 id[76] = 0; /* No NCQ/AN etc */ 554 555 if (strstr(model_num, "Integrated Technology Express")) { 556 /* Set feature bits the firmware neglects */ 557 id[49] |= cpu_to_le16(0x0300); /* LBA, DMA */ 558 id[83] &= cpu_to_le16(0x7FFF); 559 id[83] |= cpu_to_le16(0x4400); /* Word 83 is valid and LBA48 */ 560 id[86] |= cpu_to_le16(0x0400); /* LBA48 on */ 561 id[ATA_ID_MAJOR_VER] |= cpu_to_le16(0x1F); 562 /* Clear the serial number because it's different each boot 563 which breaks validation on resume */ 564 memset(&id[ATA_ID_SERNO], 0x20, ATA_ID_SERNO_LEN); 565 } 566 return err_mask; 567 } 568 569 /** 570 * it821x_check_atapi_dma - ATAPI DMA handler 571 * @qc: Command we are about to issue 572 * 573 * Decide if this ATAPI command can be issued by DMA on this 574 * controller. Return 0 if it can be. 575 */ 576 577 static int it821x_check_atapi_dma(struct ata_queued_cmd *qc) 578 { 579 struct ata_port *ap = qc->ap; 580 struct it821x_dev *itdev = ap->private_data; 581 582 /* Only use dma for transfers to/from the media. */ 583 if (ata_qc_raw_nbytes(qc) < 2048) 584 return -EOPNOTSUPP; 585 586 /* No ATAPI DMA in smart mode */ 587 if (itdev->smart) 588 return -EOPNOTSUPP; 589 /* No ATAPI DMA on rev 10 */ 590 if (itdev->timing10) 591 return -EOPNOTSUPP; 592 /* Cool */ 593 return 0; 594 } 595 596 /** 597 * it821x_display_disk - display disk setup 598 * @ap: ATA port 599 * @n: Device number 600 * @buf: Buffer block from firmware 601 * 602 * Produce a nice informative display of the device setup as provided 603 * by the firmware. 604 */ 605 606 static void it821x_display_disk(struct ata_port *ap, int n, u8 *buf) 607 { 608 unsigned char id[41]; 609 int mode = 0; 610 const char *mtype = ""; 611 char mbuf[8]; 612 const char *cbl = "(40 wire cable)"; 613 614 static const char *types[5] = { 615 "RAID0", "RAID1", "RAID 0+1", "JBOD", "DISK" 616 }; 617 618 if (buf[52] > 4) /* No Disk */ 619 return; 620 621 ata_id_c_string((u16 *)buf, id, 0, 41); 622 623 if (buf[51]) { 624 mode = ffs(buf[51]); 625 mtype = "UDMA"; 626 } else if (buf[49]) { 627 mode = ffs(buf[49]); 628 mtype = "MWDMA"; 629 } 630 631 if (buf[76]) 632 cbl = ""; 633 634 if (mode) 635 snprintf(mbuf, 8, "%5s%d", mtype, mode - 1); 636 else 637 strcpy(mbuf, "PIO"); 638 if (buf[52] == 4) 639 ata_port_info(ap, "%d: %-6s %-8s %s %s\n", 640 n, mbuf, types[buf[52]], id, cbl); 641 else 642 ata_port_info(ap, "%d: %-6s %-8s Volume: %1d %s %s\n", 643 n, mbuf, types[buf[52]], buf[53], id, cbl); 644 if (buf[125] < 100) 645 ata_port_info(ap, "%d: Rebuilding: %d%%\n", n, buf[125]); 646 } 647 648 /** 649 * it821x_firmware_command - issue firmware command 650 * @ap: IT821x port to interrogate 651 * @cmd: command 652 * @len: length 653 * 654 * Issue firmware commands expecting data back from the controller. We 655 * use this to issue commands that do not go via the normal paths. Other 656 * commands such as 0xFC can be issued normally. 657 */ 658 659 static u8 *it821x_firmware_command(struct ata_port *ap, u8 cmd, int len) 660 { 661 u8 status; 662 int n = 0; 663 u16 *buf = kmalloc(len, GFP_KERNEL); 664 665 if (!buf) 666 return NULL; 667 668 /* This isn't quite a normal ATA command as we are talking to the 669 firmware not the drives */ 670 ap->ctl |= ATA_NIEN; 671 iowrite8(ap->ctl, ap->ioaddr.ctl_addr); 672 ata_wait_idle(ap); 673 iowrite8(ATA_DEVICE_OBS, ap->ioaddr.device_addr); 674 iowrite8(cmd, ap->ioaddr.command_addr); 675 udelay(1); 676 /* This should be almost immediate but a little paranoia goes a long 677 way. */ 678 while(n++ < 10) { 679 status = ioread8(ap->ioaddr.status_addr); 680 if (status & ATA_ERR) { 681 kfree(buf); 682 ata_port_err(ap, "%s: rejected\n", __func__); 683 return NULL; 684 } 685 if (status & ATA_DRQ) { 686 ioread16_rep(ap->ioaddr.data_addr, buf, len/2); 687 return (u8 *)buf; 688 } 689 usleep_range(500, 1000); 690 } 691 kfree(buf); 692 ata_port_err(ap, "%s: timeout\n", __func__); 693 return NULL; 694 } 695 696 /** 697 * it821x_probe_firmware - firmware reporting/setup 698 * @ap: IT821x port being probed 699 * 700 * Probe the firmware of the controller by issuing firmware command 701 * 0xFA and analysing the returned data. 702 */ 703 704 static void it821x_probe_firmware(struct ata_port *ap) 705 { 706 u8 *buf; 707 int i; 708 709 /* This is a bit ugly as we can't just issue a task file to a device 710 as this is controller magic */ 711 712 buf = it821x_firmware_command(ap, 0xFA, 512); 713 714 if (buf != NULL) { 715 ata_port_info(ap, "pata_it821x: Firmware %02X/%02X/%02X%02X\n", 716 buf[505], 717 buf[506], 718 buf[507], 719 buf[508]); 720 for (i = 0; i < 4; i++) 721 it821x_display_disk(ap, i, buf + 128 * i); 722 kfree(buf); 723 } 724 } 725 726 727 728 /** 729 * it821x_port_start - port setup 730 * @ap: ATA port being set up 731 * 732 * The it821x needs to maintain private data structures and also to 733 * use the standard PCI interface which lacks support for this 734 * functionality. We instead set up the private data on the port 735 * start hook, and tear it down on port stop 736 */ 737 738 static int it821x_port_start(struct ata_port *ap) 739 { 740 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 741 struct it821x_dev *itdev; 742 u8 conf; 743 744 int ret = ata_bmdma_port_start(ap); 745 if (ret < 0) 746 return ret; 747 748 itdev = devm_kzalloc(&pdev->dev, sizeof(struct it821x_dev), GFP_KERNEL); 749 if (itdev == NULL) 750 return -ENOMEM; 751 ap->private_data = itdev; 752 753 pci_read_config_byte(pdev, 0x50, &conf); 754 755 if (conf & 1) { 756 itdev->smart = 1; 757 /* Long I/O's although allowed in LBA48 space cause the 758 onboard firmware to enter the twighlight zone */ 759 /* No ATAPI DMA in this mode either */ 760 if (ap->port_no == 0) 761 it821x_probe_firmware(ap); 762 } 763 /* Pull the current clocks from 0x50 */ 764 if (conf & (1 << (1 + ap->port_no))) 765 itdev->clock_mode = ATA_50; 766 else 767 itdev->clock_mode = ATA_66; 768 769 itdev->want[0][1] = ATA_ANY; 770 itdev->want[1][1] = ATA_ANY; 771 itdev->last_device = -1; 772 773 if (pdev->revision == 0x10) { 774 itdev->timing10 = 1; 775 /* Need to disable ATAPI DMA for this case */ 776 if (!itdev->smart) 777 dev_warn(&pdev->dev, 778 "Revision 0x10, workarounds activated.\n"); 779 } 780 781 return 0; 782 } 783 784 /** 785 * it821x_rdc_cable - Cable detect for RDC1010 786 * @ap: port we are checking 787 * 788 * Return the RDC1010 cable type. Unlike the IT821x we know how to do 789 * this and can do host side cable detect 790 */ 791 792 static int it821x_rdc_cable(struct ata_port *ap) 793 { 794 u16 r40; 795 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 796 797 pci_read_config_word(pdev, 0x40, &r40); 798 if (r40 & (1 << (2 + ap->port_no))) 799 return ATA_CBL_PATA40; 800 return ATA_CBL_PATA80; 801 } 802 803 static const struct scsi_host_template it821x_sht = { 804 ATA_BMDMA_SHT(DRV_NAME), 805 }; 806 807 static struct ata_port_operations it821x_smart_port_ops = { 808 .inherits = &ata_bmdma_port_ops, 809 810 .check_atapi_dma= it821x_check_atapi_dma, 811 .qc_issue = it821x_smart_qc_issue, 812 813 .cable_detect = ata_cable_80wire, 814 .set_mode = it821x_smart_set_mode, 815 .dev_config = it821x_dev_config, 816 .read_id = it821x_read_id, 817 818 .port_start = it821x_port_start, 819 }; 820 821 static struct ata_port_operations it821x_passthru_port_ops = { 822 .inherits = &ata_bmdma_port_ops, 823 824 .check_atapi_dma= it821x_check_atapi_dma, 825 .sff_dev_select = it821x_passthru_dev_select, 826 .bmdma_start = it821x_passthru_bmdma_start, 827 .bmdma_stop = it821x_passthru_bmdma_stop, 828 .qc_issue = it821x_passthru_qc_issue, 829 830 .cable_detect = ata_cable_unknown, 831 .set_piomode = it821x_passthru_set_piomode, 832 .set_dmamode = it821x_passthru_set_dmamode, 833 834 .port_start = it821x_port_start, 835 }; 836 837 static struct ata_port_operations it821x_rdc_port_ops = { 838 .inherits = &ata_bmdma_port_ops, 839 840 .check_atapi_dma= it821x_check_atapi_dma, 841 .sff_dev_select = it821x_passthru_dev_select, 842 .bmdma_start = it821x_passthru_bmdma_start, 843 .bmdma_stop = it821x_passthru_bmdma_stop, 844 .qc_issue = it821x_passthru_qc_issue, 845 846 .cable_detect = it821x_rdc_cable, 847 .set_piomode = it821x_passthru_set_piomode, 848 .set_dmamode = it821x_passthru_set_dmamode, 849 850 .port_start = it821x_port_start, 851 }; 852 853 static void it821x_disable_raid(struct pci_dev *pdev) 854 { 855 /* Neither the RDC nor the IT8211 */ 856 if (pdev->vendor != PCI_VENDOR_ID_ITE || 857 pdev->device != PCI_DEVICE_ID_ITE_8212) 858 return; 859 860 /* Reset local CPU, and set BIOS not ready */ 861 pci_write_config_byte(pdev, 0x5E, 0x01); 862 863 /* Set to bypass mode, and reset PCI bus */ 864 pci_write_config_byte(pdev, 0x50, 0x00); 865 pci_write_config_word(pdev, PCI_COMMAND, 866 PCI_COMMAND_PARITY | PCI_COMMAND_IO | 867 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 868 pci_write_config_word(pdev, 0x40, 0xA0F3); 869 870 pci_write_config_dword(pdev,0x4C, 0x02040204); 871 pci_write_config_byte(pdev, 0x42, 0x36); 872 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x20); 873 } 874 875 876 static int it821x_init_one(struct pci_dev *pdev, const struct pci_device_id *id) 877 { 878 u8 conf; 879 880 static const struct ata_port_info info_smart = { 881 .flags = ATA_FLAG_SLAVE_POSS, 882 .pio_mask = ATA_PIO4, 883 .mwdma_mask = ATA_MWDMA2, 884 .udma_mask = ATA_UDMA6, 885 .port_ops = &it821x_smart_port_ops 886 }; 887 static const struct ata_port_info info_passthru = { 888 .flags = ATA_FLAG_SLAVE_POSS, 889 .pio_mask = ATA_PIO4, 890 .mwdma_mask = ATA_MWDMA2, 891 .udma_mask = ATA_UDMA6, 892 .port_ops = &it821x_passthru_port_ops 893 }; 894 static const struct ata_port_info info_rdc = { 895 .flags = ATA_FLAG_SLAVE_POSS, 896 .pio_mask = ATA_PIO4, 897 .mwdma_mask = ATA_MWDMA2, 898 .udma_mask = ATA_UDMA6, 899 .port_ops = &it821x_rdc_port_ops 900 }; 901 static const struct ata_port_info info_rdc_11 = { 902 .flags = ATA_FLAG_SLAVE_POSS, 903 .pio_mask = ATA_PIO4, 904 .mwdma_mask = ATA_MWDMA2, 905 /* No UDMA */ 906 .port_ops = &it821x_rdc_port_ops 907 }; 908 909 const struct ata_port_info *ppi[] = { NULL, NULL }; 910 static const char *mode[2] = { "pass through", "smart" }; 911 int rc; 912 913 rc = pcim_enable_device(pdev); 914 if (rc) 915 return rc; 916 917 if (pdev->vendor == PCI_VENDOR_ID_RDC) { 918 /* Deal with Vortex86SX */ 919 if (pdev->revision == 0x11) 920 ppi[0] = &info_rdc_11; 921 else 922 ppi[0] = &info_rdc; 923 } else { 924 /* Force the card into bypass mode if so requested */ 925 if (it8212_noraid) { 926 dev_info(&pdev->dev, "forcing bypass mode.\n"); 927 it821x_disable_raid(pdev); 928 } 929 pci_read_config_byte(pdev, 0x50, &conf); 930 conf &= 1; 931 932 dev_info(&pdev->dev, "controller in %s mode.\n", mode[conf]); 933 934 if (conf == 0) 935 ppi[0] = &info_passthru; 936 else 937 ppi[0] = &info_smart; 938 } 939 return ata_pci_bmdma_init_one(pdev, ppi, &it821x_sht, NULL, 0); 940 } 941 942 #ifdef CONFIG_PM_SLEEP 943 static int it821x_reinit_one(struct pci_dev *pdev) 944 { 945 struct ata_host *host = pci_get_drvdata(pdev); 946 int rc; 947 948 rc = ata_pci_device_do_resume(pdev); 949 if (rc) 950 return rc; 951 /* Resume - turn raid back off if need be */ 952 if (it8212_noraid) 953 it821x_disable_raid(pdev); 954 ata_host_resume(host); 955 return rc; 956 } 957 #endif 958 959 static const struct pci_device_id it821x[] = { 960 { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8211), }, 961 { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8212), }, 962 { PCI_VDEVICE(RDC, PCI_DEVICE_ID_RDC_D1010), }, 963 964 { }, 965 }; 966 967 static struct pci_driver it821x_pci_driver = { 968 .name = DRV_NAME, 969 .id_table = it821x, 970 .probe = it821x_init_one, 971 .remove = ata_pci_remove_one, 972 #ifdef CONFIG_PM_SLEEP 973 .suspend = ata_pci_device_suspend, 974 .resume = it821x_reinit_one, 975 #endif 976 }; 977 978 module_pci_driver(it821x_pci_driver); 979 980 MODULE_AUTHOR("Alan Cox"); 981 MODULE_DESCRIPTION("low-level driver for the IT8211/IT8212 IDE RAID controller"); 982 MODULE_LICENSE("GPL"); 983 MODULE_DEVICE_TABLE(pci, it821x); 984 MODULE_VERSION(DRV_VERSION); 985 986 module_param_named(noraid, it8212_noraid, int, S_IRUGO); 987 MODULE_PARM_DESC(noraid, "Force card into bypass mode"); 988