1 /* 2 * Libata driver for the highpoint 37x and 30x UDMA66 ATA controllers. 3 * 4 * This driver is heavily based upon: 5 * 6 * linux/drivers/ide/pci/hpt366.c Version 0.36 April 25, 2003 7 * 8 * Copyright (C) 1999-2003 Andre Hedrick <andre@linux-ide.org> 9 * Portions Copyright (C) 2001 Sun Microsystems, Inc. 10 * Portions Copyright (C) 2003 Red Hat Inc 11 * Portions Copyright (C) 2005-2010 MontaVista Software, Inc. 12 * 13 * TODO 14 * Look into engine reset on timeout errors. Should not be required. 15 */ 16 17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 18 19 #include <linux/kernel.h> 20 #include <linux/module.h> 21 #include <linux/pci.h> 22 #include <linux/init.h> 23 #include <linux/blkdev.h> 24 #include <linux/delay.h> 25 #include <scsi/scsi_host.h> 26 #include <linux/libata.h> 27 28 #define DRV_NAME "pata_hpt37x" 29 #define DRV_VERSION "0.6.23" 30 31 struct hpt_clock { 32 u8 xfer_speed; 33 u32 timing; 34 }; 35 36 struct hpt_chip { 37 const char *name; 38 unsigned int base; 39 struct hpt_clock const *clocks[4]; 40 }; 41 42 /* key for bus clock timings 43 * bit 44 * 0:3 data_high_time. Inactive time of DIOW_/DIOR_ for PIO and MW DMA. 45 * cycles = value + 1 46 * 4:8 data_low_time. Active time of DIOW_/DIOR_ for PIO and MW DMA. 47 * cycles = value + 1 48 * 9:12 cmd_high_time. Inactive time of DIOW_/DIOR_ during task file 49 * register access. 50 * 13:17 cmd_low_time. Active time of DIOW_/DIOR_ during task file 51 * register access. 52 * 18:20 udma_cycle_time. Clock cycles for UDMA xfer. 53 * 21 CLK frequency for UDMA: 0=ATA clock, 1=dual ATA clock. 54 * 22:24 pre_high_time. Time to initialize 1st cycle for PIO and MW DMA xfer. 55 * 25:27 cmd_pre_high_time. Time to initialize 1st PIO cycle for task file 56 * register access. 57 * 28 UDMA enable. 58 * 29 DMA enable. 59 * 30 PIO_MST enable. If set, the chip is in bus master mode during 60 * PIO xfer. 61 * 31 FIFO enable. Only for PIO. 62 */ 63 64 static struct hpt_clock hpt37x_timings_33[] = { 65 { XFER_UDMA_6, 0x12446231 }, /* 0x12646231 ?? */ 66 { XFER_UDMA_5, 0x12446231 }, 67 { XFER_UDMA_4, 0x12446231 }, 68 { XFER_UDMA_3, 0x126c6231 }, 69 { XFER_UDMA_2, 0x12486231 }, 70 { XFER_UDMA_1, 0x124c6233 }, 71 { XFER_UDMA_0, 0x12506297 }, 72 73 { XFER_MW_DMA_2, 0x22406c31 }, 74 { XFER_MW_DMA_1, 0x22406c33 }, 75 { XFER_MW_DMA_0, 0x22406c97 }, 76 77 { XFER_PIO_4, 0x06414e31 }, 78 { XFER_PIO_3, 0x06414e42 }, 79 { XFER_PIO_2, 0x06414e53 }, 80 { XFER_PIO_1, 0x06814e93 }, 81 { XFER_PIO_0, 0x06814ea7 } 82 }; 83 84 static struct hpt_clock hpt37x_timings_50[] = { 85 { XFER_UDMA_6, 0x12848242 }, 86 { XFER_UDMA_5, 0x12848242 }, 87 { XFER_UDMA_4, 0x12ac8242 }, 88 { XFER_UDMA_3, 0x128c8242 }, 89 { XFER_UDMA_2, 0x120c8242 }, 90 { XFER_UDMA_1, 0x12148254 }, 91 { XFER_UDMA_0, 0x121882ea }, 92 93 { XFER_MW_DMA_2, 0x22808242 }, 94 { XFER_MW_DMA_1, 0x22808254 }, 95 { XFER_MW_DMA_0, 0x228082ea }, 96 97 { XFER_PIO_4, 0x0a81f442 }, 98 { XFER_PIO_3, 0x0a81f443 }, 99 { XFER_PIO_2, 0x0a81f454 }, 100 { XFER_PIO_1, 0x0ac1f465 }, 101 { XFER_PIO_0, 0x0ac1f48a } 102 }; 103 104 static struct hpt_clock hpt37x_timings_66[] = { 105 { XFER_UDMA_6, 0x1c869c62 }, 106 { XFER_UDMA_5, 0x1cae9c62 }, /* 0x1c8a9c62 */ 107 { XFER_UDMA_4, 0x1c8a9c62 }, 108 { XFER_UDMA_3, 0x1c8e9c62 }, 109 { XFER_UDMA_2, 0x1c929c62 }, 110 { XFER_UDMA_1, 0x1c9a9c62 }, 111 { XFER_UDMA_0, 0x1c829c62 }, 112 113 { XFER_MW_DMA_2, 0x2c829c62 }, 114 { XFER_MW_DMA_1, 0x2c829c66 }, 115 { XFER_MW_DMA_0, 0x2c829d2e }, 116 117 { XFER_PIO_4, 0x0c829c62 }, 118 { XFER_PIO_3, 0x0c829c84 }, 119 { XFER_PIO_2, 0x0c829ca6 }, 120 { XFER_PIO_1, 0x0d029d26 }, 121 { XFER_PIO_0, 0x0d029d5e } 122 }; 123 124 125 static const struct hpt_chip hpt370 = { 126 "HPT370", 127 48, 128 { 129 hpt37x_timings_33, 130 NULL, 131 NULL, 132 NULL 133 } 134 }; 135 136 static const struct hpt_chip hpt370a = { 137 "HPT370A", 138 48, 139 { 140 hpt37x_timings_33, 141 NULL, 142 hpt37x_timings_50, 143 NULL 144 } 145 }; 146 147 static const struct hpt_chip hpt372 = { 148 "HPT372", 149 55, 150 { 151 hpt37x_timings_33, 152 NULL, 153 hpt37x_timings_50, 154 hpt37x_timings_66 155 } 156 }; 157 158 static const struct hpt_chip hpt302 = { 159 "HPT302", 160 66, 161 { 162 hpt37x_timings_33, 163 NULL, 164 hpt37x_timings_50, 165 hpt37x_timings_66 166 } 167 }; 168 169 static const struct hpt_chip hpt371 = { 170 "HPT371", 171 66, 172 { 173 hpt37x_timings_33, 174 NULL, 175 hpt37x_timings_50, 176 hpt37x_timings_66 177 } 178 }; 179 180 static const struct hpt_chip hpt372a = { 181 "HPT372A", 182 66, 183 { 184 hpt37x_timings_33, 185 NULL, 186 hpt37x_timings_50, 187 hpt37x_timings_66 188 } 189 }; 190 191 static const struct hpt_chip hpt374 = { 192 "HPT374", 193 48, 194 { 195 hpt37x_timings_33, 196 NULL, 197 NULL, 198 NULL 199 } 200 }; 201 202 /** 203 * hpt37x_find_mode - reset the hpt37x bus 204 * @ap: ATA port 205 * @speed: transfer mode 206 * 207 * Return the 32bit register programming information for this channel 208 * that matches the speed provided. 209 */ 210 211 static u32 hpt37x_find_mode(struct ata_port *ap, int speed) 212 { 213 struct hpt_clock *clocks = ap->host->private_data; 214 215 while (clocks->xfer_speed) { 216 if (clocks->xfer_speed == speed) 217 return clocks->timing; 218 clocks++; 219 } 220 BUG(); 221 return 0xffffffffU; /* silence compiler warning */ 222 } 223 224 static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr, 225 const char * const list[]) 226 { 227 unsigned char model_num[ATA_ID_PROD_LEN + 1]; 228 int i = 0; 229 230 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 231 232 while (list[i] != NULL) { 233 if (!strcmp(list[i], model_num)) { 234 pr_warn("%s is not supported for %s\n", 235 modestr, list[i]); 236 return 1; 237 } 238 i++; 239 } 240 return 0; 241 } 242 243 static const char * const bad_ata33[] = { 244 "Maxtor 92720U8", "Maxtor 92040U6", "Maxtor 91360U4", "Maxtor 91020U3", 245 "Maxtor 90845U3", "Maxtor 90650U2", 246 "Maxtor 91360D8", "Maxtor 91190D7", "Maxtor 91020D6", "Maxtor 90845D5", 247 "Maxtor 90680D4", "Maxtor 90510D3", "Maxtor 90340D2", 248 "Maxtor 91152D8", "Maxtor 91008D7", "Maxtor 90845D6", "Maxtor 90840D6", 249 "Maxtor 90720D5", "Maxtor 90648D5", "Maxtor 90576D4", 250 "Maxtor 90510D4", 251 "Maxtor 90432D3", "Maxtor 90288D2", "Maxtor 90256D2", 252 "Maxtor 91000D8", "Maxtor 90910D8", "Maxtor 90875D7", "Maxtor 90840D7", 253 "Maxtor 90750D6", "Maxtor 90625D5", "Maxtor 90500D4", 254 "Maxtor 91728D8", "Maxtor 91512D7", "Maxtor 91303D6", "Maxtor 91080D5", 255 "Maxtor 90845D4", "Maxtor 90680D4", "Maxtor 90648D3", "Maxtor 90432D2", 256 NULL 257 }; 258 259 static const char * const bad_ata100_5[] = { 260 "IBM-DTLA-307075", 261 "IBM-DTLA-307060", 262 "IBM-DTLA-307045", 263 "IBM-DTLA-307030", 264 "IBM-DTLA-307020", 265 "IBM-DTLA-307015", 266 "IBM-DTLA-305040", 267 "IBM-DTLA-305030", 268 "IBM-DTLA-305020", 269 "IC35L010AVER07-0", 270 "IC35L020AVER07-0", 271 "IC35L030AVER07-0", 272 "IC35L040AVER07-0", 273 "IC35L060AVER07-0", 274 "WDC AC310200R", 275 NULL 276 }; 277 278 /** 279 * hpt370_filter - mode selection filter 280 * @adev: ATA device 281 * 282 * Block UDMA on devices that cause trouble with this controller. 283 */ 284 285 static unsigned long hpt370_filter(struct ata_device *adev, unsigned long mask) 286 { 287 if (adev->class == ATA_DEV_ATA) { 288 if (hpt_dma_blacklisted(adev, "UDMA", bad_ata33)) 289 mask &= ~ATA_MASK_UDMA; 290 if (hpt_dma_blacklisted(adev, "UDMA100", bad_ata100_5)) 291 mask &= ~(0xE0 << ATA_SHIFT_UDMA); 292 } 293 return mask; 294 } 295 296 /** 297 * hpt370a_filter - mode selection filter 298 * @adev: ATA device 299 * 300 * Block UDMA on devices that cause trouble with this controller. 301 */ 302 303 static unsigned long hpt370a_filter(struct ata_device *adev, unsigned long mask) 304 { 305 if (adev->class == ATA_DEV_ATA) { 306 if (hpt_dma_blacklisted(adev, "UDMA100", bad_ata100_5)) 307 mask &= ~(0xE0 << ATA_SHIFT_UDMA); 308 } 309 return mask; 310 } 311 312 /** 313 * hpt372_filter - mode selection filter 314 * @adev: ATA device 315 * @mask: mode mask 316 * 317 * The Marvell bridge chips used on the HighPoint SATA cards do not seem 318 * to support the UltraDMA modes 1, 2, and 3 as well as any MWDMA modes... 319 */ 320 static unsigned long hpt372_filter(struct ata_device *adev, unsigned long mask) 321 { 322 if (ata_id_is_sata(adev->id)) 323 mask &= ~((0xE << ATA_SHIFT_UDMA) | ATA_MASK_MWDMA); 324 325 return mask; 326 } 327 328 /** 329 * hpt37x_cable_detect - Detect the cable type 330 * @ap: ATA port to detect on 331 * 332 * Return the cable type attached to this port 333 */ 334 335 static int hpt37x_cable_detect(struct ata_port *ap) 336 { 337 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 338 u8 scr2, ata66; 339 340 pci_read_config_byte(pdev, 0x5B, &scr2); 341 pci_write_config_byte(pdev, 0x5B, scr2 & ~0x01); 342 343 udelay(10); /* debounce */ 344 345 /* Cable register now active */ 346 pci_read_config_byte(pdev, 0x5A, &ata66); 347 /* Restore state */ 348 pci_write_config_byte(pdev, 0x5B, scr2); 349 350 if (ata66 & (2 >> ap->port_no)) 351 return ATA_CBL_PATA40; 352 else 353 return ATA_CBL_PATA80; 354 } 355 356 /** 357 * hpt374_fn1_cable_detect - Detect the cable type 358 * @ap: ATA port to detect on 359 * 360 * Return the cable type attached to this port 361 */ 362 363 static int hpt374_fn1_cable_detect(struct ata_port *ap) 364 { 365 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 366 unsigned int mcrbase = 0x50 + 4 * ap->port_no; 367 u16 mcr3; 368 u8 ata66; 369 370 /* Do the extra channel work */ 371 pci_read_config_word(pdev, mcrbase + 2, &mcr3); 372 /* Set bit 15 of 0x52 to enable TCBLID as input */ 373 pci_write_config_word(pdev, mcrbase + 2, mcr3 | 0x8000); 374 pci_read_config_byte(pdev, 0x5A, &ata66); 375 /* Reset TCBLID/FCBLID to output */ 376 pci_write_config_word(pdev, mcrbase + 2, mcr3); 377 378 if (ata66 & (2 >> ap->port_no)) 379 return ATA_CBL_PATA40; 380 else 381 return ATA_CBL_PATA80; 382 } 383 384 /** 385 * hpt37x_pre_reset - reset the hpt37x bus 386 * @link: ATA link to reset 387 * @deadline: deadline jiffies for the operation 388 * 389 * Perform the initial reset handling for the HPT37x. 390 */ 391 392 static int hpt37x_pre_reset(struct ata_link *link, unsigned long deadline) 393 { 394 struct ata_port *ap = link->ap; 395 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 396 static const struct pci_bits hpt37x_enable_bits[] = { 397 { 0x50, 1, 0x04, 0x04 }, 398 { 0x54, 1, 0x04, 0x04 } 399 }; 400 401 if (!pci_test_config_bits(pdev, &hpt37x_enable_bits[ap->port_no])) 402 return -ENOENT; 403 404 /* Reset the state machine */ 405 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37); 406 udelay(100); 407 408 return ata_sff_prereset(link, deadline); 409 } 410 411 static void hpt370_set_mode(struct ata_port *ap, struct ata_device *adev, 412 u8 mode) 413 { 414 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 415 u32 addr1, addr2; 416 u32 reg, timing, mask; 417 u8 fast; 418 419 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no); 420 addr2 = 0x51 + 4 * ap->port_no; 421 422 /* Fast interrupt prediction disable, hold off interrupt disable */ 423 pci_read_config_byte(pdev, addr2, &fast); 424 fast &= ~0x02; 425 fast |= 0x01; 426 pci_write_config_byte(pdev, addr2, fast); 427 428 /* Determine timing mask and find matching mode entry */ 429 if (mode < XFER_MW_DMA_0) 430 mask = 0xcfc3ffff; 431 else if (mode < XFER_UDMA_0) 432 mask = 0x31c001ff; 433 else 434 mask = 0x303c0000; 435 436 timing = hpt37x_find_mode(ap, mode); 437 438 pci_read_config_dword(pdev, addr1, ®); 439 reg = (reg & ~mask) | (timing & mask); 440 pci_write_config_dword(pdev, addr1, reg); 441 } 442 /** 443 * hpt370_set_piomode - PIO setup 444 * @ap: ATA interface 445 * @adev: device on the interface 446 * 447 * Perform PIO mode setup. 448 */ 449 450 static void hpt370_set_piomode(struct ata_port *ap, struct ata_device *adev) 451 { 452 hpt370_set_mode(ap, adev, adev->pio_mode); 453 } 454 455 /** 456 * hpt370_set_dmamode - DMA timing setup 457 * @ap: ATA interface 458 * @adev: Device being configured 459 * 460 * Set up the channel for MWDMA or UDMA modes. 461 */ 462 463 static void hpt370_set_dmamode(struct ata_port *ap, struct ata_device *adev) 464 { 465 hpt370_set_mode(ap, adev, adev->dma_mode); 466 } 467 468 /** 469 * hpt370_bmdma_end - DMA engine stop 470 * @qc: ATA command 471 * 472 * Work around the HPT370 DMA engine. 473 */ 474 475 static void hpt370_bmdma_stop(struct ata_queued_cmd *qc) 476 { 477 struct ata_port *ap = qc->ap; 478 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 479 void __iomem *bmdma = ap->ioaddr.bmdma_addr; 480 u8 dma_stat = ioread8(bmdma + ATA_DMA_STATUS); 481 u8 dma_cmd; 482 483 if (dma_stat & ATA_DMA_ACTIVE) { 484 udelay(20); 485 dma_stat = ioread8(bmdma + ATA_DMA_STATUS); 486 } 487 if (dma_stat & ATA_DMA_ACTIVE) { 488 /* Clear the engine */ 489 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37); 490 udelay(10); 491 /* Stop DMA */ 492 dma_cmd = ioread8(bmdma + ATA_DMA_CMD); 493 iowrite8(dma_cmd & ~ATA_DMA_START, bmdma + ATA_DMA_CMD); 494 /* Clear Error */ 495 dma_stat = ioread8(bmdma + ATA_DMA_STATUS); 496 iowrite8(dma_stat | ATA_DMA_INTR | ATA_DMA_ERR, 497 bmdma + ATA_DMA_STATUS); 498 /* Clear the engine */ 499 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37); 500 udelay(10); 501 } 502 ata_bmdma_stop(qc); 503 } 504 505 static void hpt372_set_mode(struct ata_port *ap, struct ata_device *adev, 506 u8 mode) 507 { 508 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 509 u32 addr1, addr2; 510 u32 reg, timing, mask; 511 u8 fast; 512 513 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no); 514 addr2 = 0x51 + 4 * ap->port_no; 515 516 /* Fast interrupt prediction disable, hold off interrupt disable */ 517 pci_read_config_byte(pdev, addr2, &fast); 518 fast &= ~0x07; 519 pci_write_config_byte(pdev, addr2, fast); 520 521 /* Determine timing mask and find matching mode entry */ 522 if (mode < XFER_MW_DMA_0) 523 mask = 0xcfc3ffff; 524 else if (mode < XFER_UDMA_0) 525 mask = 0x31c001ff; 526 else 527 mask = 0x303c0000; 528 529 timing = hpt37x_find_mode(ap, mode); 530 531 pci_read_config_dword(pdev, addr1, ®); 532 reg = (reg & ~mask) | (timing & mask); 533 pci_write_config_dword(pdev, addr1, reg); 534 } 535 536 /** 537 * hpt372_set_piomode - PIO setup 538 * @ap: ATA interface 539 * @adev: device on the interface 540 * 541 * Perform PIO mode setup. 542 */ 543 544 static void hpt372_set_piomode(struct ata_port *ap, struct ata_device *adev) 545 { 546 hpt372_set_mode(ap, adev, adev->pio_mode); 547 } 548 549 /** 550 * hpt372_set_dmamode - DMA timing setup 551 * @ap: ATA interface 552 * @adev: Device being configured 553 * 554 * Set up the channel for MWDMA or UDMA modes. 555 */ 556 557 static void hpt372_set_dmamode(struct ata_port *ap, struct ata_device *adev) 558 { 559 hpt372_set_mode(ap, adev, adev->dma_mode); 560 } 561 562 /** 563 * hpt37x_bmdma_end - DMA engine stop 564 * @qc: ATA command 565 * 566 * Clean up after the HPT372 and later DMA engine 567 */ 568 569 static void hpt37x_bmdma_stop(struct ata_queued_cmd *qc) 570 { 571 struct ata_port *ap = qc->ap; 572 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 573 int mscreg = 0x50 + 4 * ap->port_no; 574 u8 bwsr_stat, msc_stat; 575 576 pci_read_config_byte(pdev, 0x6A, &bwsr_stat); 577 pci_read_config_byte(pdev, mscreg, &msc_stat); 578 if (bwsr_stat & (1 << ap->port_no)) 579 pci_write_config_byte(pdev, mscreg, msc_stat | 0x30); 580 ata_bmdma_stop(qc); 581 } 582 583 584 static struct scsi_host_template hpt37x_sht = { 585 ATA_BMDMA_SHT(DRV_NAME), 586 }; 587 588 /* 589 * Configuration for HPT370 590 */ 591 592 static struct ata_port_operations hpt370_port_ops = { 593 .inherits = &ata_bmdma_port_ops, 594 595 .bmdma_stop = hpt370_bmdma_stop, 596 597 .mode_filter = hpt370_filter, 598 .cable_detect = hpt37x_cable_detect, 599 .set_piomode = hpt370_set_piomode, 600 .set_dmamode = hpt370_set_dmamode, 601 .prereset = hpt37x_pre_reset, 602 }; 603 604 /* 605 * Configuration for HPT370A. Close to 370 but less filters 606 */ 607 608 static struct ata_port_operations hpt370a_port_ops = { 609 .inherits = &hpt370_port_ops, 610 .mode_filter = hpt370a_filter, 611 }; 612 613 /* 614 * Configuration for HPT371 and HPT302. Slightly different PIO and DMA 615 * mode setting functionality. 616 */ 617 618 static struct ata_port_operations hpt302_port_ops = { 619 .inherits = &ata_bmdma_port_ops, 620 621 .bmdma_stop = hpt37x_bmdma_stop, 622 623 .cable_detect = hpt37x_cable_detect, 624 .set_piomode = hpt372_set_piomode, 625 .set_dmamode = hpt372_set_dmamode, 626 .prereset = hpt37x_pre_reset, 627 }; 628 629 /* 630 * Configuration for HPT372. Mode setting works like 371 and 302 631 * but we have a mode filter. 632 */ 633 634 static struct ata_port_operations hpt372_port_ops = { 635 .inherits = &hpt302_port_ops, 636 .mode_filter = hpt372_filter, 637 }; 638 639 /* 640 * Configuration for HPT374. Mode setting and filtering works like 372 641 * but we have a different cable detection procedure for function 1. 642 */ 643 644 static struct ata_port_operations hpt374_fn1_port_ops = { 645 .inherits = &hpt372_port_ops, 646 .cable_detect = hpt374_fn1_cable_detect, 647 }; 648 649 /** 650 * hpt37x_clock_slot - Turn timing to PC clock entry 651 * @freq: Reported frequency timing 652 * @base: Base timing 653 * 654 * Turn the timing data intoa clock slot (0 for 33, 1 for 40, 2 for 50 655 * and 3 for 66Mhz) 656 */ 657 658 static int hpt37x_clock_slot(unsigned int freq, unsigned int base) 659 { 660 unsigned int f = (base * freq) / 192; /* Mhz */ 661 if (f < 40) 662 return 0; /* 33Mhz slot */ 663 if (f < 45) 664 return 1; /* 40Mhz slot */ 665 if (f < 55) 666 return 2; /* 50Mhz slot */ 667 return 3; /* 60Mhz slot */ 668 } 669 670 /** 671 * hpt37x_calibrate_dpll - Calibrate the DPLL loop 672 * @dev: PCI device 673 * 674 * Perform a calibration cycle on the HPT37x DPLL. Returns 1 if this 675 * succeeds 676 */ 677 678 static int hpt37x_calibrate_dpll(struct pci_dev *dev) 679 { 680 u8 reg5b; 681 u32 reg5c; 682 int tries; 683 684 for (tries = 0; tries < 0x5000; tries++) { 685 udelay(50); 686 pci_read_config_byte(dev, 0x5b, ®5b); 687 if (reg5b & 0x80) { 688 /* See if it stays set */ 689 for (tries = 0; tries < 0x1000; tries++) { 690 pci_read_config_byte(dev, 0x5b, ®5b); 691 /* Failed ? */ 692 if ((reg5b & 0x80) == 0) 693 return 0; 694 } 695 /* Turn off tuning, we have the DPLL set */ 696 pci_read_config_dword(dev, 0x5c, ®5c); 697 pci_write_config_dword(dev, 0x5c, reg5c & ~0x100); 698 return 1; 699 } 700 } 701 /* Never went stable */ 702 return 0; 703 } 704 705 static u32 hpt374_read_freq(struct pci_dev *pdev) 706 { 707 u32 freq; 708 unsigned long io_base = pci_resource_start(pdev, 4); 709 710 if (PCI_FUNC(pdev->devfn) & 1) { 711 struct pci_dev *pdev_0; 712 713 pdev_0 = pci_get_slot(pdev->bus, pdev->devfn - 1); 714 /* Someone hot plugged the controller on us ? */ 715 if (pdev_0 == NULL) 716 return 0; 717 io_base = pci_resource_start(pdev_0, 4); 718 freq = inl(io_base + 0x90); 719 pci_dev_put(pdev_0); 720 } else 721 freq = inl(io_base + 0x90); 722 return freq; 723 } 724 725 /** 726 * hpt37x_init_one - Initialise an HPT37X/302 727 * @dev: PCI device 728 * @id: Entry in match table 729 * 730 * Initialise an HPT37x device. There are some interesting complications 731 * here. Firstly the chip may report 366 and be one of several variants. 732 * Secondly all the timings depend on the clock for the chip which we must 733 * detect and look up 734 * 735 * This is the known chip mappings. It may be missing a couple of later 736 * releases. 737 * 738 * Chip version PCI Rev Notes 739 * HPT366 4 (HPT366) 0 Other driver 740 * HPT366 4 (HPT366) 1 Other driver 741 * HPT368 4 (HPT366) 2 Other driver 742 * HPT370 4 (HPT366) 3 UDMA100 743 * HPT370A 4 (HPT366) 4 UDMA100 744 * HPT372 4 (HPT366) 5 UDMA133 (1) 745 * HPT372N 4 (HPT366) 6 Other driver 746 * HPT372A 5 (HPT372) 1 UDMA133 (1) 747 * HPT372N 5 (HPT372) 2 Other driver 748 * HPT302 6 (HPT302) 1 UDMA133 749 * HPT302N 6 (HPT302) 2 Other driver 750 * HPT371 7 (HPT371) * UDMA133 751 * HPT374 8 (HPT374) * UDMA133 4 channel 752 * HPT372N 9 (HPT372N) * Other driver 753 * 754 * (1) UDMA133 support depends on the bus clock 755 */ 756 757 static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id) 758 { 759 /* HPT370 - UDMA100 */ 760 static const struct ata_port_info info_hpt370 = { 761 .flags = ATA_FLAG_SLAVE_POSS, 762 .pio_mask = ATA_PIO4, 763 .mwdma_mask = ATA_MWDMA2, 764 .udma_mask = ATA_UDMA5, 765 .port_ops = &hpt370_port_ops 766 }; 767 /* HPT370A - UDMA100 */ 768 static const struct ata_port_info info_hpt370a = { 769 .flags = ATA_FLAG_SLAVE_POSS, 770 .pio_mask = ATA_PIO4, 771 .mwdma_mask = ATA_MWDMA2, 772 .udma_mask = ATA_UDMA5, 773 .port_ops = &hpt370a_port_ops 774 }; 775 /* HPT370 - UDMA66 */ 776 static const struct ata_port_info info_hpt370_33 = { 777 .flags = ATA_FLAG_SLAVE_POSS, 778 .pio_mask = ATA_PIO4, 779 .mwdma_mask = ATA_MWDMA2, 780 .udma_mask = ATA_UDMA4, 781 .port_ops = &hpt370_port_ops 782 }; 783 /* HPT370A - UDMA66 */ 784 static const struct ata_port_info info_hpt370a_33 = { 785 .flags = ATA_FLAG_SLAVE_POSS, 786 .pio_mask = ATA_PIO4, 787 .mwdma_mask = ATA_MWDMA2, 788 .udma_mask = ATA_UDMA4, 789 .port_ops = &hpt370a_port_ops 790 }; 791 /* HPT372 - UDMA133 */ 792 static const struct ata_port_info info_hpt372 = { 793 .flags = ATA_FLAG_SLAVE_POSS, 794 .pio_mask = ATA_PIO4, 795 .mwdma_mask = ATA_MWDMA2, 796 .udma_mask = ATA_UDMA6, 797 .port_ops = &hpt372_port_ops 798 }; 799 /* HPT371, 302 - UDMA133 */ 800 static const struct ata_port_info info_hpt302 = { 801 .flags = ATA_FLAG_SLAVE_POSS, 802 .pio_mask = ATA_PIO4, 803 .mwdma_mask = ATA_MWDMA2, 804 .udma_mask = ATA_UDMA6, 805 .port_ops = &hpt302_port_ops 806 }; 807 /* HPT374 - UDMA100, function 1 uses different cable_detect method */ 808 static const struct ata_port_info info_hpt374_fn0 = { 809 .flags = ATA_FLAG_SLAVE_POSS, 810 .pio_mask = ATA_PIO4, 811 .mwdma_mask = ATA_MWDMA2, 812 .udma_mask = ATA_UDMA5, 813 .port_ops = &hpt372_port_ops 814 }; 815 static const struct ata_port_info info_hpt374_fn1 = { 816 .flags = ATA_FLAG_SLAVE_POSS, 817 .pio_mask = ATA_PIO4, 818 .mwdma_mask = ATA_MWDMA2, 819 .udma_mask = ATA_UDMA5, 820 .port_ops = &hpt374_fn1_port_ops 821 }; 822 823 static const int MHz[4] = { 33, 40, 50, 66 }; 824 void *private_data = NULL; 825 const struct ata_port_info *ppi[] = { NULL, NULL }; 826 u8 rev = dev->revision; 827 u8 irqmask; 828 u8 mcr1; 829 u32 freq; 830 int prefer_dpll = 1; 831 832 unsigned long iobase = pci_resource_start(dev, 4); 833 834 const struct hpt_chip *chip_table; 835 int clock_slot; 836 int rc; 837 838 rc = pcim_enable_device(dev); 839 if (rc) 840 return rc; 841 842 switch (dev->device) { 843 case PCI_DEVICE_ID_TTI_HPT366: 844 /* May be a later chip in disguise. Check */ 845 /* Older chips are in the HPT366 driver. Ignore them */ 846 if (rev < 3) 847 return -ENODEV; 848 /* N series chips have their own driver. Ignore */ 849 if (rev == 6) 850 return -ENODEV; 851 852 switch (rev) { 853 case 3: 854 ppi[0] = &info_hpt370; 855 chip_table = &hpt370; 856 prefer_dpll = 0; 857 break; 858 case 4: 859 ppi[0] = &info_hpt370a; 860 chip_table = &hpt370a; 861 prefer_dpll = 0; 862 break; 863 case 5: 864 ppi[0] = &info_hpt372; 865 chip_table = &hpt372; 866 break; 867 default: 868 pr_err("Unknown HPT366 subtype, please report (%d)\n", 869 rev); 870 return -ENODEV; 871 } 872 break; 873 case PCI_DEVICE_ID_TTI_HPT372: 874 /* 372N if rev >= 2 */ 875 if (rev >= 2) 876 return -ENODEV; 877 ppi[0] = &info_hpt372; 878 chip_table = &hpt372a; 879 break; 880 case PCI_DEVICE_ID_TTI_HPT302: 881 /* 302N if rev > 1 */ 882 if (rev > 1) 883 return -ENODEV; 884 ppi[0] = &info_hpt302; 885 /* Check this */ 886 chip_table = &hpt302; 887 break; 888 case PCI_DEVICE_ID_TTI_HPT371: 889 if (rev > 1) 890 return -ENODEV; 891 ppi[0] = &info_hpt302; 892 chip_table = &hpt371; 893 /* 894 * Single channel device, master is not present but the BIOS 895 * (or us for non x86) must mark it absent 896 */ 897 pci_read_config_byte(dev, 0x50, &mcr1); 898 mcr1 &= ~0x04; 899 pci_write_config_byte(dev, 0x50, mcr1); 900 break; 901 case PCI_DEVICE_ID_TTI_HPT374: 902 chip_table = &hpt374; 903 if (!(PCI_FUNC(dev->devfn) & 1)) 904 *ppi = &info_hpt374_fn0; 905 else 906 *ppi = &info_hpt374_fn1; 907 break; 908 default: 909 pr_err("PCI table is bogus, please report (%d)\n", dev->device); 910 return -ENODEV; 911 } 912 /* Ok so this is a chip we support */ 913 914 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4)); 915 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78); 916 pci_write_config_byte(dev, PCI_MIN_GNT, 0x08); 917 pci_write_config_byte(dev, PCI_MAX_LAT, 0x08); 918 919 pci_read_config_byte(dev, 0x5A, &irqmask); 920 irqmask &= ~0x10; 921 pci_write_config_byte(dev, 0x5a, irqmask); 922 923 /* 924 * default to pci clock. make sure MA15/16 are set to output 925 * to prevent drives having problems with 40-pin cables. Needed 926 * for some drives such as IBM-DTLA which will not enter ready 927 * state on reset when PDIAG is a input. 928 */ 929 930 pci_write_config_byte(dev, 0x5b, 0x23); 931 932 /* 933 * HighPoint does this for HPT372A. 934 * NOTE: This register is only writeable via I/O space. 935 */ 936 if (chip_table == &hpt372a) 937 outb(0x0e, iobase + 0x9c); 938 939 /* 940 * Some devices do not let this value be accessed via PCI space 941 * according to the old driver. In addition we must use the value 942 * from FN 0 on the HPT374. 943 */ 944 945 if (chip_table == &hpt374) { 946 freq = hpt374_read_freq(dev); 947 if (freq == 0) 948 return -ENODEV; 949 } else 950 freq = inl(iobase + 0x90); 951 952 if ((freq >> 12) != 0xABCDE) { 953 int i; 954 u8 sr; 955 u32 total = 0; 956 957 pr_warn("BIOS has not set timing clocks\n"); 958 959 /* This is the process the HPT371 BIOS is reported to use */ 960 for (i = 0; i < 128; i++) { 961 pci_read_config_byte(dev, 0x78, &sr); 962 total += sr & 0x1FF; 963 udelay(15); 964 } 965 freq = total / 128; 966 } 967 freq &= 0x1FF; 968 969 /* 970 * Turn the frequency check into a band and then find a timing 971 * table to match it. 972 */ 973 974 clock_slot = hpt37x_clock_slot(freq, chip_table->base); 975 if (chip_table->clocks[clock_slot] == NULL || prefer_dpll) { 976 /* 977 * We need to try PLL mode instead 978 * 979 * For non UDMA133 capable devices we should 980 * use a 50MHz DPLL by choice 981 */ 982 unsigned int f_low, f_high; 983 int dpll, adjust; 984 985 /* Compute DPLL */ 986 dpll = (ppi[0]->udma_mask & 0xC0) ? 3 : 2; 987 988 f_low = (MHz[clock_slot] * 48) / MHz[dpll]; 989 f_high = f_low + 2; 990 if (clock_slot > 1) 991 f_high += 2; 992 993 /* Select the DPLL clock. */ 994 pci_write_config_byte(dev, 0x5b, 0x21); 995 pci_write_config_dword(dev, 0x5C, 996 (f_high << 16) | f_low | 0x100); 997 998 for (adjust = 0; adjust < 8; adjust++) { 999 if (hpt37x_calibrate_dpll(dev)) 1000 break; 1001 /* 1002 * See if it'll settle at a fractionally 1003 * different clock 1004 */ 1005 if (adjust & 1) 1006 f_low -= adjust >> 1; 1007 else 1008 f_high += adjust >> 1; 1009 pci_write_config_dword(dev, 0x5C, 1010 (f_high << 16) | f_low | 0x100); 1011 } 1012 if (adjust == 8) { 1013 pr_err("DPLL did not stabilize!\n"); 1014 return -ENODEV; 1015 } 1016 if (dpll == 3) 1017 private_data = (void *)hpt37x_timings_66; 1018 else 1019 private_data = (void *)hpt37x_timings_50; 1020 1021 pr_info("bus clock %dMHz, using %dMHz DPLL\n", 1022 MHz[clock_slot], MHz[dpll]); 1023 } else { 1024 private_data = (void *)chip_table->clocks[clock_slot]; 1025 /* 1026 * Perform a final fixup. Note that we will have used the 1027 * DPLL on the HPT372 which means we don't have to worry 1028 * about lack of UDMA133 support on lower clocks 1029 */ 1030 1031 if (clock_slot < 2 && ppi[0] == &info_hpt370) 1032 ppi[0] = &info_hpt370_33; 1033 if (clock_slot < 2 && ppi[0] == &info_hpt370a) 1034 ppi[0] = &info_hpt370a_33; 1035 1036 pr_info("%s using %dMHz bus clock\n", 1037 chip_table->name, MHz[clock_slot]); 1038 } 1039 1040 /* Now kick off ATA set up */ 1041 return ata_pci_bmdma_init_one(dev, ppi, &hpt37x_sht, private_data, 0); 1042 } 1043 1044 static const struct pci_device_id hpt37x[] = { 1045 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), }, 1046 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT371), }, 1047 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372), }, 1048 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT374), }, 1049 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT302), }, 1050 1051 { }, 1052 }; 1053 1054 static struct pci_driver hpt37x_pci_driver = { 1055 .name = DRV_NAME, 1056 .id_table = hpt37x, 1057 .probe = hpt37x_init_one, 1058 .remove = ata_pci_remove_one 1059 }; 1060 1061 static int __init hpt37x_init(void) 1062 { 1063 return pci_register_driver(&hpt37x_pci_driver); 1064 } 1065 1066 static void __exit hpt37x_exit(void) 1067 { 1068 pci_unregister_driver(&hpt37x_pci_driver); 1069 } 1070 1071 MODULE_AUTHOR("Alan Cox"); 1072 MODULE_DESCRIPTION("low-level driver for the Highpoint HPT37x/30x"); 1073 MODULE_LICENSE("GPL"); 1074 MODULE_DEVICE_TABLE(pci, hpt37x); 1075 MODULE_VERSION(DRV_VERSION); 1076 1077 module_init(hpt37x_init); 1078 module_exit(hpt37x_exit); 1079