1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * pata-legacy.c - Legacy port PATA/SATA controller driver. 4 * Copyright 2005/2006 Red Hat, all rights reserved. 5 * 6 * An ATA driver for the legacy ATA ports. 7 * 8 * Data Sources: 9 * Opti 82C465/82C611 support: Data sheets at opti-inc.com 10 * HT6560 series: 11 * Promise 20230/20620: 12 * http://www.ryston.cz/petr/vlb/pdc20230b.html 13 * http://www.ryston.cz/petr/vlb/pdc20230c.html 14 * http://www.ryston.cz/petr/vlb/pdc20630.html 15 * QDI65x0: 16 * http://www.ryston.cz/petr/vlb/qd6500.html 17 * http://www.ryston.cz/petr/vlb/qd6580.html 18 * 19 * QDI65x0 probe code based on drivers/ide/legacy/qd65xx.c 20 * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by 21 * Samuel Thibault <samuel.thibault@ens-lyon.org> 22 * 23 * Unsupported but docs exist: 24 * Appian/Adaptec AIC25VL01/Cirrus Logic PD7220 25 * 26 * This driver handles legacy (that is "ISA/VLB side") IDE ports found 27 * on PC class systems. There are three hybrid devices that are exceptions 28 * The Cyrix 5510/5520 where a pre SFF ATA device is on the bridge and 29 * the MPIIX where the tuning is PCI side but the IDE is "ISA side". 30 * 31 * Specific support is included for the ht6560a/ht6560b/opti82c611a/ 32 * opti82c465mv/promise 20230c/20630/qdi65x0/winbond83759A 33 * 34 * Support for the Winbond 83759A when operating in advanced mode. 35 * Multichip mode is not currently supported. 36 * 37 * Use the autospeed and pio_mask options with: 38 * Appian ADI/2 aka CLPD7220 or AIC25VL01. 39 * Use the jumpers, autospeed and set pio_mask to the mode on the jumpers with 40 * Goldstar GM82C711, PIC-1288A-125, UMC 82C871F, Winbond W83759, 41 * Winbond W83759A, Promise PDC20230-B 42 * 43 * For now use autospeed and pio_mask as above with the W83759A. This may 44 * change. 45 */ 46 47#include <linux/async.h> 48#include <linux/kernel.h> 49#include <linux/module.h> 50#include <linux/pci.h> 51#include <linux/init.h> 52#include <linux/blkdev.h> 53#include <linux/delay.h> 54#include <scsi/scsi_host.h> 55#include <linux/ata.h> 56#include <linux/libata.h> 57#include <linux/platform_device.h> 58 59#define DRV_NAME "pata_legacy" 60#define DRV_VERSION "0.6.5" 61 62#define NR_HOST 6 63 64static int all; 65module_param(all, int, 0444); 66MODULE_PARM_DESC(all, 67 "Set to probe unclaimed pri/sec ISA port ranges even if PCI"); 68 69static int probe_all; 70module_param(probe_all, int, 0); 71MODULE_PARM_DESC(probe_all, 72 "Set to probe tertiary+ ISA port ranges even if PCI"); 73 74static int probe_mask = ~0; 75module_param(probe_mask, int, 0); 76MODULE_PARM_DESC(probe_mask, "Probe mask for legacy ISA PATA ports"); 77 78static int autospeed; 79module_param(autospeed, int, 0); 80MODULE_PARM_DESC(autospeed, "Chip present that snoops speed changes"); 81 82static int pio_mask = ATA_PIO4; 83module_param(pio_mask, int, 0); 84MODULE_PARM_DESC(pio_mask, "PIO range for autospeed devices"); 85 86static int iordy_mask = 0xFFFFFFFF; 87module_param(iordy_mask, int, 0); 88MODULE_PARM_DESC(iordy_mask, "Use IORDY if available"); 89 90static int ht6560a; 91module_param(ht6560a, int, 0); 92MODULE_PARM_DESC(ht6560a, "HT 6560A on primary 1, second 2, both 3"); 93 94static int ht6560b; 95module_param(ht6560b, int, 0); 96MODULE_PARM_DESC(ht6560b, "HT 6560B on primary 1, secondary 2, both 3"); 97 98static int opti82c611a; 99module_param(opti82c611a, int, 0); 100MODULE_PARM_DESC(opti82c611a, 101 "Opti 82c611A on primary 1, secondary 2, both 3"); 102 103static int opti82c46x; 104module_param(opti82c46x, int, 0); 105MODULE_PARM_DESC(opti82c46x, 106 "Opti 82c465MV on primary 1, secondary 2, both 3"); 107 108#ifdef CONFIG_PATA_QDI_MODULE 109static int qdi = 1; 110#else 111static int qdi; 112#endif 113module_param(qdi, int, 0); 114MODULE_PARM_DESC(qdi, "Set to probe QDI controllers"); 115 116#ifdef CONFIG_PATA_WINBOND_VLB_MODULE 117static int winbond = 1; 118#else 119static int winbond; 120#endif 121module_param(winbond, int, 0); 122MODULE_PARM_DESC(winbond, 123 "Set to probe Winbond controllers, " 124 "give I/O port if non standard"); 125 126 127enum controller { 128 BIOS = 0, 129 SNOOP = 1, 130 PDC20230 = 2, 131 HT6560A = 3, 132 HT6560B = 4, 133 OPTI611A = 5, 134 OPTI46X = 6, 135 QDI6500 = 7, 136 QDI6580 = 8, 137 QDI6580DP = 9, /* Dual channel mode is different */ 138 W83759A = 10, 139 140 UNKNOWN = -1 141}; 142 143struct legacy_data { 144 unsigned long timing; 145 u8 clock[2]; 146 u8 last; 147 int fast; 148 enum controller type; 149 struct platform_device *platform_dev; 150}; 151 152struct legacy_probe { 153 unsigned char *name; 154 unsigned long port; 155 unsigned int irq; 156 unsigned int slot; 157 enum controller type; 158 unsigned long private; 159}; 160 161struct legacy_controller { 162 const char *name; 163 struct ata_port_operations *ops; 164 unsigned int pio_mask; 165 unsigned int flags; 166 unsigned int pflags; 167 int (*setup)(struct platform_device *, struct legacy_probe *probe, 168 struct legacy_data *data); 169}; 170 171static int legacy_port[NR_HOST] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 }; 172 173static struct legacy_probe probe_list[NR_HOST]; 174static struct legacy_data legacy_data[NR_HOST]; 175static struct ata_host *legacy_host[NR_HOST]; 176static int nr_legacy_host; 177 178 179/** 180 * legacy_probe_add - Add interface to probe list 181 * @port: Controller port 182 * @irq: IRQ number 183 * @type: Controller type 184 * @private: Controller specific info 185 * 186 * Add an entry into the probe list for ATA controllers. This is used 187 * to add the default ISA slots and then to build up the table 188 * further according to other ISA/VLB/Weird device scans 189 * 190 * An I/O port list is used to keep ordering stable and sane, as we 191 * don't have any good way to talk about ordering otherwise 192 */ 193 194static int legacy_probe_add(unsigned long port, unsigned int irq, 195 enum controller type, unsigned long private) 196{ 197 struct legacy_probe *lp = &probe_list[0]; 198 int i; 199 struct legacy_probe *free = NULL; 200 201 for (i = 0; i < NR_HOST; i++) { 202 if (lp->port == 0 && free == NULL) 203 free = lp; 204 /* Matching port, or the correct slot for ordering */ 205 if (lp->port == port || legacy_port[i] == port) { 206 if (!(probe_mask & 1 << i)) 207 return -1; 208 free = lp; 209 break; 210 } 211 lp++; 212 } 213 if (free == NULL) { 214 printk(KERN_ERR "pata_legacy: Too many interfaces.\n"); 215 return -1; 216 } 217 /* Fill in the entry for later probing */ 218 free->port = port; 219 free->irq = irq; 220 free->type = type; 221 free->private = private; 222 return 0; 223} 224 225 226/** 227 * legacy_set_mode - mode setting 228 * @link: IDE link 229 * @unused: Device that failed when error is returned 230 * 231 * Use a non standard set_mode function. We don't want to be tuned. 232 * 233 * The BIOS configured everything. Our job is not to fiddle. Just use 234 * whatever PIO the hardware is using and leave it at that. When we 235 * get some kind of nice user driven API for control then we can 236 * expand on this as per hdparm in the base kernel. 237 */ 238 239static int legacy_set_mode(struct ata_link *link, struct ata_device **unused) 240{ 241 struct ata_device *dev; 242 243 ata_for_each_dev(dev, link, ENABLED) { 244 ata_dev_info(dev, "configured for PIO\n"); 245 dev->pio_mode = XFER_PIO_0; 246 dev->xfer_mode = XFER_PIO_0; 247 dev->xfer_shift = ATA_SHIFT_PIO; 248 dev->flags |= ATA_DFLAG_PIO; 249 } 250 return 0; 251} 252 253static const struct scsi_host_template legacy_sht = { 254 ATA_PIO_SHT(DRV_NAME), 255}; 256 257static const struct ata_port_operations legacy_base_port_ops = { 258 .inherits = &ata_sff_port_ops, 259 .cable_detect = ata_cable_40wire, 260}; 261 262/* 263 * These ops are used if the user indicates the hardware 264 * snoops the commands to decide on the mode and handles the 265 * mode selection "magically" itself. Several legacy controllers 266 * do this. The mode range can be set if it is not 0x1F by setting 267 * pio_mask as well. 268 */ 269 270static struct ata_port_operations simple_port_ops = { 271 .inherits = &legacy_base_port_ops, 272 .sff_data_xfer = ata_sff_data_xfer32, 273}; 274 275static struct ata_port_operations legacy_port_ops = { 276 .inherits = &legacy_base_port_ops, 277 .sff_data_xfer = ata_sff_data_xfer32, 278 .set_mode = legacy_set_mode, 279}; 280 281/* 282 * Promise 20230C and 20620 support 283 * 284 * This controller supports PIO0 to PIO2. We set PIO timings 285 * conservatively to allow for 50MHz Vesa Local Bus. The 20620 DMA 286 * support is weird being DMA to controller and PIO'd to the host 287 * and not supported. 288 */ 289 290static void pdc20230_set_piomode(struct ata_port *ap, struct ata_device *adev) 291{ 292 int tries = 5; 293 int pio = adev->pio_mode - XFER_PIO_0; 294 u8 rt; 295 unsigned long flags; 296 297 /* Safe as UP only. Force I/Os to occur together */ 298 299 local_irq_save(flags); 300 301 /* Unlock the control interface */ 302 do { 303 inb(0x1F5); 304 outb(inb(0x1F2) | 0x80, 0x1F2); 305 inb(0x1F2); 306 inb(0x3F6); 307 inb(0x3F6); 308 inb(0x1F2); 309 inb(0x1F2); 310 } 311 while ((inb(0x1F2) & 0x80) && --tries); 312 313 local_irq_restore(flags); 314 315 outb(inb(0x1F4) & 0x07, 0x1F4); 316 317 rt = inb(0x1F3); 318 rt &= ~(0x07 << (3 * !adev->devno)); 319 if (pio) 320 rt |= (1 + 3 * pio) << (3 * !adev->devno); 321 outb(rt, 0x1F3); 322 323 udelay(100); 324 outb(inb(0x1F2) | 0x01, 0x1F2); 325 udelay(100); 326 inb(0x1F5); 327 328} 329 330static unsigned int pdc_data_xfer_vlb(struct ata_queued_cmd *qc, 331 unsigned char *buf, unsigned int buflen, int rw) 332{ 333 struct ata_device *dev = qc->dev; 334 struct ata_port *ap = dev->link->ap; 335 int slop = buflen & 3; 336 337 /* 32bit I/O capable *and* we need to write a whole number of dwords */ 338 if (ata_id_has_dword_io(dev->id) && (slop == 0 || slop == 3) 339 && (ap->pflags & ATA_PFLAG_PIO32)) { 340 unsigned long flags; 341 342 local_irq_save(flags); 343 344 /* Perform the 32bit I/O synchronization sequence */ 345 ioread8(ap->ioaddr.nsect_addr); 346 ioread8(ap->ioaddr.nsect_addr); 347 ioread8(ap->ioaddr.nsect_addr); 348 349 /* Now the data */ 350 if (rw == READ) 351 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2); 352 else 353 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2); 354 355 if (unlikely(slop)) { 356 __le32 pad = 0; 357 358 if (rw == READ) { 359 pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr)); 360 memcpy(buf + buflen - slop, &pad, slop); 361 } else { 362 memcpy(&pad, buf + buflen - slop, slop); 363 iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr); 364 } 365 buflen += 4 - slop; 366 } 367 local_irq_restore(flags); 368 } else 369 buflen = ata_sff_data_xfer32(qc, buf, buflen, rw); 370 371 return buflen; 372} 373 374static struct ata_port_operations pdc20230_port_ops = { 375 .inherits = &legacy_base_port_ops, 376 .set_piomode = pdc20230_set_piomode, 377 .sff_data_xfer = pdc_data_xfer_vlb, 378}; 379 380/* 381 * Holtek 6560A support 382 * 383 * This controller supports PIO0 to PIO2 (no IORDY even though higher 384 * timings can be loaded). 385 */ 386 387static void ht6560a_set_piomode(struct ata_port *ap, struct ata_device *adev) 388{ 389 u8 active, recover; 390 struct ata_timing t; 391 392 /* Get the timing data in cycles. For now play safe at 50Mhz */ 393 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000); 394 395 active = clamp_val(t.active, 2, 15); 396 recover = clamp_val(t.recover, 4, 15); 397 398 inb(0x3E6); 399 inb(0x3E6); 400 inb(0x3E6); 401 inb(0x3E6); 402 403 iowrite8(recover << 4 | active, ap->ioaddr.device_addr); 404 ioread8(ap->ioaddr.status_addr); 405} 406 407static struct ata_port_operations ht6560a_port_ops = { 408 .inherits = &legacy_base_port_ops, 409 .set_piomode = ht6560a_set_piomode, 410}; 411 412/* 413 * Holtek 6560B support 414 * 415 * This controller supports PIO0 to PIO4. We honour the BIOS/jumper FIFO 416 * setting unless we see an ATAPI device in which case we force it off. 417 * 418 * FIXME: need to implement 2nd channel support. 419 */ 420 421static void ht6560b_set_piomode(struct ata_port *ap, struct ata_device *adev) 422{ 423 u8 active, recover; 424 struct ata_timing t; 425 426 /* Get the timing data in cycles. For now play safe at 50Mhz */ 427 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000); 428 429 active = clamp_val(t.active, 2, 15); 430 recover = clamp_val(t.recover, 2, 16) & 0x0F; 431 432 inb(0x3E6); 433 inb(0x3E6); 434 inb(0x3E6); 435 inb(0x3E6); 436 437 iowrite8(recover << 4 | active, ap->ioaddr.device_addr); 438 439 if (adev->class != ATA_DEV_ATA) { 440 u8 rconf = inb(0x3E6); 441 if (rconf & 0x24) { 442 rconf &= ~0x24; 443 outb(rconf, 0x3E6); 444 } 445 } 446 ioread8(ap->ioaddr.status_addr); 447} 448 449static struct ata_port_operations ht6560b_port_ops = { 450 .inherits = &legacy_base_port_ops, 451 .set_piomode = ht6560b_set_piomode, 452}; 453 454/* 455 * Opti core chipset helpers 456 */ 457 458/** 459 * opti_syscfg - read OPTI chipset configuration 460 * @reg: Configuration register to read 461 * 462 * Returns the value of an OPTI system board configuration register. 463 */ 464 465static u8 opti_syscfg(u8 reg) 466{ 467 unsigned long flags; 468 u8 r; 469 470 /* Uniprocessor chipset and must force cycles adjancent */ 471 local_irq_save(flags); 472 outb(reg, 0x22); 473 r = inb(0x24); 474 local_irq_restore(flags); 475 return r; 476} 477 478/* 479 * Opti 82C611A 480 * 481 * This controller supports PIO0 to PIO3. 482 */ 483 484static void opti82c611a_set_piomode(struct ata_port *ap, 485 struct ata_device *adev) 486{ 487 u8 active, recover, setup; 488 struct ata_timing t; 489 struct ata_device *pair = ata_dev_pair(adev); 490 int clock; 491 int khz[4] = { 50000, 40000, 33000, 25000 }; 492 u8 rc; 493 494 /* Enter configuration mode */ 495 ioread16(ap->ioaddr.error_addr); 496 ioread16(ap->ioaddr.error_addr); 497 iowrite8(3, ap->ioaddr.nsect_addr); 498 499 /* Read VLB clock strapping */ 500 clock = 1000000000 / khz[ioread8(ap->ioaddr.lbah_addr) & 0x03]; 501 502 /* Get the timing data in cycles */ 503 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000); 504 505 /* Setup timing is shared */ 506 if (pair) { 507 struct ata_timing tp; 508 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000); 509 510 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP); 511 } 512 513 active = clamp_val(t.active, 2, 17) - 2; 514 recover = clamp_val(t.recover, 1, 16) - 1; 515 setup = clamp_val(t.setup, 1, 4) - 1; 516 517 /* Select the right timing bank for write timing */ 518 rc = ioread8(ap->ioaddr.lbal_addr); 519 rc &= 0x7F; 520 rc |= (adev->devno << 7); 521 iowrite8(rc, ap->ioaddr.lbal_addr); 522 523 /* Write the timings */ 524 iowrite8(active << 4 | recover, ap->ioaddr.error_addr); 525 526 /* Select the right bank for read timings, also 527 load the shared timings for address */ 528 rc = ioread8(ap->ioaddr.device_addr); 529 rc &= 0xC0; 530 rc |= adev->devno; /* Index select */ 531 rc |= (setup << 4) | 0x04; 532 iowrite8(rc, ap->ioaddr.device_addr); 533 534 /* Load the read timings */ 535 iowrite8(active << 4 | recover, ap->ioaddr.data_addr); 536 537 /* Ensure the timing register mode is right */ 538 rc = ioread8(ap->ioaddr.lbal_addr); 539 rc &= 0x73; 540 rc |= 0x84; 541 iowrite8(rc, ap->ioaddr.lbal_addr); 542 543 /* Exit command mode */ 544 iowrite8(0x83, ap->ioaddr.nsect_addr); 545} 546 547 548static struct ata_port_operations opti82c611a_port_ops = { 549 .inherits = &legacy_base_port_ops, 550 .set_piomode = opti82c611a_set_piomode, 551}; 552 553/* 554 * Opti 82C465MV 555 * 556 * This controller supports PIO0 to PIO3. Unlike the 611A the MVB 557 * version is dual channel but doesn't have a lot of unique registers. 558 */ 559 560static void opti82c46x_set_piomode(struct ata_port *ap, struct ata_device *adev) 561{ 562 u8 active, recover, setup; 563 struct ata_timing t; 564 struct ata_device *pair = ata_dev_pair(adev); 565 int clock; 566 int khz[4] = { 50000, 40000, 33000, 25000 }; 567 u8 rc; 568 u8 sysclk; 569 570 /* Get the clock */ 571 sysclk = (opti_syscfg(0xAC) & 0xC0) >> 6; /* BIOS set */ 572 573 /* Enter configuration mode */ 574 ioread16(ap->ioaddr.error_addr); 575 ioread16(ap->ioaddr.error_addr); 576 iowrite8(3, ap->ioaddr.nsect_addr); 577 578 /* Read VLB clock strapping */ 579 clock = 1000000000 / khz[sysclk]; 580 581 /* Get the timing data in cycles */ 582 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000); 583 584 /* Setup timing is shared */ 585 if (pair) { 586 struct ata_timing tp; 587 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000); 588 589 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP); 590 } 591 592 active = clamp_val(t.active, 2, 17) - 2; 593 recover = clamp_val(t.recover, 1, 16) - 1; 594 setup = clamp_val(t.setup, 1, 4) - 1; 595 596 /* Select the right timing bank for write timing */ 597 rc = ioread8(ap->ioaddr.lbal_addr); 598 rc &= 0x7F; 599 rc |= (adev->devno << 7); 600 iowrite8(rc, ap->ioaddr.lbal_addr); 601 602 /* Write the timings */ 603 iowrite8(active << 4 | recover, ap->ioaddr.error_addr); 604 605 /* Select the right bank for read timings, also 606 load the shared timings for address */ 607 rc = ioread8(ap->ioaddr.device_addr); 608 rc &= 0xC0; 609 rc |= adev->devno; /* Index select */ 610 rc |= (setup << 4) | 0x04; 611 iowrite8(rc, ap->ioaddr.device_addr); 612 613 /* Load the read timings */ 614 iowrite8(active << 4 | recover, ap->ioaddr.data_addr); 615 616 /* Ensure the timing register mode is right */ 617 rc = ioread8(ap->ioaddr.lbal_addr); 618 rc &= 0x73; 619 rc |= 0x84; 620 iowrite8(rc, ap->ioaddr.lbal_addr); 621 622 /* Exit command mode */ 623 iowrite8(0x83, ap->ioaddr.nsect_addr); 624 625 /* We need to know this for quad device on the MVB */ 626 ap->host->private_data = ap; 627} 628 629/** 630 * opti82c46x_qc_issue - command issue 631 * @qc: command pending 632 * 633 * Called when the libata layer is about to issue a command. We wrap 634 * this interface so that we can load the correct ATA timings. The 635 * MVB has a single set of timing registers and these are shared 636 * across channels. As there are two registers we really ought to 637 * track the last two used values as a sort of register window. For 638 * now we just reload on a channel switch. On the single channel 639 * setup this condition never fires so we do nothing extra. 640 * 641 * FIXME: dual channel needs ->serialize support 642 */ 643 644static unsigned int opti82c46x_qc_issue(struct ata_queued_cmd *qc) 645{ 646 struct ata_port *ap = qc->ap; 647 struct ata_device *adev = qc->dev; 648 649 /* If timings are set and for the wrong channel (2nd test is 650 due to a libata shortcoming and will eventually go I hope) */ 651 if (ap->host->private_data != ap->host 652 && ap->host->private_data != NULL) 653 opti82c46x_set_piomode(ap, adev); 654 655 return ata_sff_qc_issue(qc); 656} 657 658static struct ata_port_operations opti82c46x_port_ops = { 659 .inherits = &legacy_base_port_ops, 660 .set_piomode = opti82c46x_set_piomode, 661 .qc_issue = opti82c46x_qc_issue, 662}; 663 664/** 665 * qdi65x0_set_piomode - PIO setup for QDI65x0 666 * @ap: Port 667 * @adev: Device 668 * 669 * In single channel mode the 6580 has one clock per device and we can 670 * avoid the requirement to clock switch. We also have to load the timing 671 * into the right clock according to whether we are master or slave. 672 * 673 * In dual channel mode the 6580 has one clock per channel and we have 674 * to software clockswitch in qc_issue. 675 */ 676 677static void qdi65x0_set_piomode(struct ata_port *ap, struct ata_device *adev) 678{ 679 struct ata_timing t; 680 struct legacy_data *ld_qdi = ap->host->private_data; 681 int active, recovery; 682 u8 timing; 683 684 /* Get the timing data in cycles */ 685 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000); 686 687 if (ld_qdi->fast) { 688 active = 8 - clamp_val(t.active, 1, 8); 689 recovery = 18 - clamp_val(t.recover, 3, 18); 690 } else { 691 active = 9 - clamp_val(t.active, 2, 9); 692 recovery = 15 - clamp_val(t.recover, 0, 15); 693 } 694 timing = (recovery << 4) | active | 0x08; 695 ld_qdi->clock[adev->devno] = timing; 696 697 if (ld_qdi->type == QDI6580) 698 outb(timing, ld_qdi->timing + 2 * adev->devno); 699 else 700 outb(timing, ld_qdi->timing + 2 * ap->port_no); 701 702 /* Clear the FIFO */ 703 if (ld_qdi->type != QDI6500 && adev->class != ATA_DEV_ATA) 704 outb(0x5F, (ld_qdi->timing & 0xFFF0) + 3); 705} 706 707/** 708 * qdi_qc_issue - command issue 709 * @qc: command pending 710 * 711 * Called when the libata layer is about to issue a command. We wrap 712 * this interface so that we can load the correct ATA timings. 713 */ 714 715static unsigned int qdi_qc_issue(struct ata_queued_cmd *qc) 716{ 717 struct ata_port *ap = qc->ap; 718 struct ata_device *adev = qc->dev; 719 struct legacy_data *ld_qdi = ap->host->private_data; 720 721 if (ld_qdi->clock[adev->devno] != ld_qdi->last) { 722 if (adev->pio_mode) { 723 ld_qdi->last = ld_qdi->clock[adev->devno]; 724 outb(ld_qdi->clock[adev->devno], ld_qdi->timing + 725 2 * ap->port_no); 726 } 727 } 728 return ata_sff_qc_issue(qc); 729} 730 731static unsigned int vlb32_data_xfer(struct ata_queued_cmd *qc, 732 unsigned char *buf, 733 unsigned int buflen, int rw) 734{ 735 struct ata_device *adev = qc->dev; 736 struct ata_port *ap = adev->link->ap; 737 int slop = buflen & 3; 738 739 if (ata_id_has_dword_io(adev->id) && (slop == 0 || slop == 3) 740 && (ap->pflags & ATA_PFLAG_PIO32)) { 741 if (rw == WRITE) 742 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2); 743 else 744 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2); 745 746 if (unlikely(slop)) { 747 __le32 pad = 0; 748 749 if (rw == WRITE) { 750 memcpy(&pad, buf + buflen - slop, slop); 751 iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr); 752 } else { 753 pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr)); 754 memcpy(buf + buflen - slop, &pad, slop); 755 } 756 } 757 return (buflen + 3) & ~3; 758 } else 759 return ata_sff_data_xfer(qc, buf, buflen, rw); 760} 761 762static int qdi_port(struct platform_device *dev, 763 struct legacy_probe *lp, struct legacy_data *ld) 764{ 765 if (devm_request_region(&dev->dev, lp->private, 4, "qdi") == NULL) 766 return -EBUSY; 767 ld->timing = lp->private; 768 return 0; 769} 770 771static struct ata_port_operations qdi6500_port_ops = { 772 .inherits = &legacy_base_port_ops, 773 .set_piomode = qdi65x0_set_piomode, 774 .qc_issue = qdi_qc_issue, 775 .sff_data_xfer = vlb32_data_xfer, 776}; 777 778static struct ata_port_operations qdi6580_port_ops = { 779 .inherits = &legacy_base_port_ops, 780 .set_piomode = qdi65x0_set_piomode, 781 .sff_data_xfer = vlb32_data_xfer, 782}; 783 784static struct ata_port_operations qdi6580dp_port_ops = { 785 .inherits = &legacy_base_port_ops, 786 .set_piomode = qdi65x0_set_piomode, 787 .qc_issue = qdi_qc_issue, 788 .sff_data_xfer = vlb32_data_xfer, 789}; 790 791static DEFINE_SPINLOCK(winbond_lock); 792 793static void winbond_writecfg(unsigned long port, u8 reg, u8 val) 794{ 795 unsigned long flags; 796 spin_lock_irqsave(&winbond_lock, flags); 797 outb(reg, port + 0x01); 798 outb(val, port + 0x02); 799 spin_unlock_irqrestore(&winbond_lock, flags); 800} 801 802static u8 winbond_readcfg(unsigned long port, u8 reg) 803{ 804 u8 val; 805 806 unsigned long flags; 807 spin_lock_irqsave(&winbond_lock, flags); 808 outb(reg, port + 0x01); 809 val = inb(port + 0x02); 810 spin_unlock_irqrestore(&winbond_lock, flags); 811 812 return val; 813} 814 815static void winbond_set_piomode(struct ata_port *ap, struct ata_device *adev) 816{ 817 struct ata_timing t; 818 struct legacy_data *ld_winbond = ap->host->private_data; 819 int active, recovery; 820 u8 reg; 821 int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2); 822 823 reg = winbond_readcfg(ld_winbond->timing, 0x81); 824 825 /* Get the timing data in cycles */ 826 if (reg & 0x40) /* Fast VLB bus, assume 50MHz */ 827 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000); 828 else 829 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000); 830 831 active = (clamp_val(t.active, 3, 17) - 1) & 0x0F; 832 recovery = (clamp_val(t.recover, 1, 15) + 1) & 0x0F; 833 timing = (active << 4) | recovery; 834 winbond_writecfg(ld_winbond->timing, timing, reg); 835 836 /* Load the setup timing */ 837 838 reg = 0x35; 839 if (adev->class != ATA_DEV_ATA) 840 reg |= 0x08; /* FIFO off */ 841 if (!ata_pio_need_iordy(adev)) 842 reg |= 0x02; /* IORDY off */ 843 reg |= (clamp_val(t.setup, 0, 3) << 6); 844 winbond_writecfg(ld_winbond->timing, timing + 1, reg); 845} 846 847static int winbond_port(struct platform_device *dev, 848 struct legacy_probe *lp, struct legacy_data *ld) 849{ 850 if (devm_request_region(&dev->dev, lp->private, 4, "winbond") == NULL) 851 return -EBUSY; 852 ld->timing = lp->private; 853 return 0; 854} 855 856static struct ata_port_operations winbond_port_ops = { 857 .inherits = &legacy_base_port_ops, 858 .set_piomode = winbond_set_piomode, 859 .sff_data_xfer = vlb32_data_xfer, 860}; 861 862static struct legacy_controller controllers[] = { 863 {"BIOS", &legacy_port_ops, ATA_PIO4, 864 ATA_FLAG_NO_IORDY, 0, NULL }, 865 {"Snooping", &simple_port_ops, ATA_PIO4, 866 0, 0, NULL }, 867 {"PDC20230", &pdc20230_port_ops, ATA_PIO2, 868 ATA_FLAG_NO_IORDY, 869 ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE, NULL }, 870 {"HT6560A", &ht6560a_port_ops, ATA_PIO2, 871 ATA_FLAG_NO_IORDY, 0, NULL }, 872 {"HT6560B", &ht6560b_port_ops, ATA_PIO4, 873 ATA_FLAG_NO_IORDY, 0, NULL }, 874 {"OPTI82C611A", &opti82c611a_port_ops, ATA_PIO3, 875 0, 0, NULL }, 876 {"OPTI82C46X", &opti82c46x_port_ops, ATA_PIO3, 877 0, 0, NULL }, 878 {"QDI6500", &qdi6500_port_ops, ATA_PIO2, 879 ATA_FLAG_NO_IORDY, 880 ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE, qdi_port }, 881 {"QDI6580", &qdi6580_port_ops, ATA_PIO4, 882 0, ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE, qdi_port }, 883 {"QDI6580DP", &qdi6580dp_port_ops, ATA_PIO4, 884 0, ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE, qdi_port }, 885 {"W83759A", &winbond_port_ops, ATA_PIO4, 886 0, ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE, 887 winbond_port } 888}; 889 890/** 891 * probe_chip_type - Discover controller 892 * @probe: Probe entry to check 893 * 894 * Probe an ATA port and identify the type of controller. We don't 895 * check if the controller appears to be driveless at this point. 896 */ 897 898static __init int probe_chip_type(struct legacy_probe *probe) 899{ 900 int mask = 1 << probe->slot; 901 902 if (winbond && (probe->port == 0x1F0 || probe->port == 0x170)) { 903 u8 reg = winbond_readcfg(winbond, 0x81); 904 reg |= 0x80; /* jumpered mode off */ 905 winbond_writecfg(winbond, 0x81, reg); 906 reg = winbond_readcfg(winbond, 0x83); 907 reg |= 0xF0; /* local control */ 908 winbond_writecfg(winbond, 0x83, reg); 909 reg = winbond_readcfg(winbond, 0x85); 910 reg |= 0xF0; /* programmable timing */ 911 winbond_writecfg(winbond, 0x85, reg); 912 913 reg = winbond_readcfg(winbond, 0x81); 914 915 if (reg & mask) 916 return W83759A; 917 } 918 if (probe->port == 0x1F0) { 919 unsigned long flags; 920 local_irq_save(flags); 921 /* Probes */ 922 outb(inb(0x1F2) | 0x80, 0x1F2); 923 inb(0x1F5); 924 inb(0x1F2); 925 inb(0x3F6); 926 inb(0x3F6); 927 inb(0x1F2); 928 inb(0x1F2); 929 930 if ((inb(0x1F2) & 0x80) == 0) { 931 /* PDC20230c or 20630 ? */ 932 printk(KERN_INFO "PDC20230-C/20630 VLB ATA controller" 933 " detected.\n"); 934 udelay(100); 935 inb(0x1F5); 936 local_irq_restore(flags); 937 return PDC20230; 938 } else { 939 outb(0x55, 0x1F2); 940 inb(0x1F2); 941 inb(0x1F2); 942 if (inb(0x1F2) == 0x00) 943 printk(KERN_INFO "PDC20230-B VLB ATA " 944 "controller detected.\n"); 945 local_irq_restore(flags); 946 return BIOS; 947 } 948 } 949 950 if (ht6560a & mask) 951 return HT6560A; 952 if (ht6560b & mask) 953 return HT6560B; 954 if (opti82c611a & mask) 955 return OPTI611A; 956 if (opti82c46x & mask) 957 return OPTI46X; 958 if (autospeed & mask) 959 return SNOOP; 960 return BIOS; 961} 962 963 964/** 965 * legacy_init_one - attach a legacy interface 966 * @probe: probe record 967 * 968 * Register an ISA bus IDE interface. Such interfaces are PIO and we 969 * assume do not support IRQ sharing. 970 */ 971 972static __init int legacy_init_one(struct legacy_probe *probe) 973{ 974 struct legacy_controller *controller = &controllers[probe->type]; 975 int pio_modes = controller->pio_mask; 976 unsigned long io = probe->port; 977 u32 mask = (1 << probe->slot); 978 struct ata_port_operations *ops = controller->ops; 979 struct legacy_data *ld = &legacy_data[probe->slot]; 980 struct ata_host *host = NULL; 981 struct ata_port *ap; 982 struct platform_device *pdev; 983 struct ata_device *dev; 984 void __iomem *io_addr, *ctrl_addr; 985 u32 iordy = (iordy_mask & mask) ? 0: ATA_FLAG_NO_IORDY; 986 int ret; 987 988 iordy |= controller->flags; 989 990 pdev = platform_device_register_simple(DRV_NAME, probe->slot, NULL, 0); 991 if (IS_ERR(pdev)) 992 return PTR_ERR(pdev); 993 994 ret = -EBUSY; 995 if (devm_request_region(&pdev->dev, io, 8, "pata_legacy") == NULL || 996 devm_request_region(&pdev->dev, io + 0x0206, 1, 997 "pata_legacy") == NULL) 998 goto fail; 999 1000 ret = -ENOMEM; 1001 io_addr = devm_ioport_map(&pdev->dev, io, 8); 1002 ctrl_addr = devm_ioport_map(&pdev->dev, io + 0x0206, 1); 1003 if (!io_addr || !ctrl_addr) 1004 goto fail; 1005 ld->type = probe->type; 1006 if (controller->setup) 1007 if (controller->setup(pdev, probe, ld) < 0) 1008 goto fail; 1009 host = ata_host_alloc(&pdev->dev, 1); 1010 if (!host) 1011 goto fail; 1012 ap = host->ports[0]; 1013 1014 ap->ops = ops; 1015 ap->pio_mask = pio_modes; 1016 ap->flags |= ATA_FLAG_SLAVE_POSS | iordy; 1017 ap->pflags |= controller->pflags; 1018 ap->ioaddr.cmd_addr = io_addr; 1019 ap->ioaddr.altstatus_addr = ctrl_addr; 1020 ap->ioaddr.ctl_addr = ctrl_addr; 1021 ata_sff_std_ports(&ap->ioaddr); 1022 ap->host->private_data = ld; 1023 1024 ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", io, io + 0x0206); 1025 1026 ret = ata_host_activate(host, probe->irq, ata_sff_interrupt, 0, 1027 &legacy_sht); 1028 if (ret) 1029 goto fail; 1030 async_synchronize_full(); 1031 ld->platform_dev = pdev; 1032 1033 /* Nothing found means we drop the port as its probably not there */ 1034 1035 ret = -ENODEV; 1036 ata_for_each_dev(dev, &ap->link, ALL) { 1037 if (!ata_dev_absent(dev)) { 1038 legacy_host[probe->slot] = host; 1039 ld->platform_dev = pdev; 1040 return 0; 1041 } 1042 } 1043 ata_host_detach(host); 1044fail: 1045 platform_device_unregister(pdev); 1046 return ret; 1047} 1048 1049/** 1050 * legacy_check_special_cases - ATA special cases 1051 * @p: PCI device to check 1052 * @primary: set this if we find an ATA master 1053 * @secondary: set this if we find an ATA secondary 1054 * 1055 * A small number of vendors implemented early PCI ATA interfaces 1056 * on bridge logic without the ATA interface being PCI visible. 1057 * Where we have a matching PCI driver we must skip the relevant 1058 * device here. If we don't know about it then the legacy driver 1059 * is the right driver anyway. 1060 */ 1061 1062static void __init legacy_check_special_cases(struct pci_dev *p, int *primary, 1063 int *secondary) 1064{ 1065 /* Cyrix CS5510 pre SFF MWDMA ATA on the bridge */ 1066 if (p->vendor == 0x1078 && p->device == 0x0000) { 1067 *primary = *secondary = 1; 1068 return; 1069 } 1070 /* Cyrix CS5520 pre SFF MWDMA ATA on the bridge */ 1071 if (p->vendor == 0x1078 && p->device == 0x0002) { 1072 *primary = *secondary = 1; 1073 return; 1074 } 1075 /* Intel MPIIX - PIO ATA on non PCI side of bridge */ 1076 if (p->vendor == 0x8086 && p->device == 0x1234) { 1077 u16 r; 1078 pci_read_config_word(p, 0x6C, &r); 1079 if (r & 0x8000) { 1080 /* ATA port enabled */ 1081 if (r & 0x4000) 1082 *secondary = 1; 1083 else 1084 *primary = 1; 1085 } 1086 return; 1087 } 1088} 1089 1090static __init void probe_opti_vlb(void) 1091{ 1092 /* If an OPTI 82C46X is present find out where the channels are */ 1093 static const char *optis[4] = { 1094 "3/463MV", "5MV", 1095 "5MVA", "5MVB" 1096 }; 1097 u8 chans = 1; 1098 u8 ctrl = (opti_syscfg(0x30) & 0xC0) >> 6; 1099 1100 opti82c46x = 3; /* Assume master and slave first */ 1101 printk(KERN_INFO DRV_NAME ": Opti 82C46%s chipset support.\n", 1102 optis[ctrl]); 1103 if (ctrl == 3) 1104 chans = (opti_syscfg(0x3F) & 0x20) ? 2 : 1; 1105 ctrl = opti_syscfg(0xAC); 1106 /* Check enabled and this port is the 465MV port. On the 1107 MVB we may have two channels */ 1108 if (ctrl & 8) { 1109 if (chans == 2) { 1110 legacy_probe_add(0x1F0, 14, OPTI46X, 0); 1111 legacy_probe_add(0x170, 15, OPTI46X, 0); 1112 } 1113 if (ctrl & 4) 1114 legacy_probe_add(0x170, 15, OPTI46X, 0); 1115 else 1116 legacy_probe_add(0x1F0, 14, OPTI46X, 0); 1117 } else 1118 legacy_probe_add(0x1F0, 14, OPTI46X, 0); 1119} 1120 1121static __init void qdi65_identify_port(u8 r, u8 res, unsigned long port) 1122{ 1123 static const unsigned long ide_port[2] = { 0x170, 0x1F0 }; 1124 /* Check card type */ 1125 if ((r & 0xF0) == 0xC0) { 1126 /* QD6500: single channel */ 1127 if (r & 8) 1128 /* Disabled ? */ 1129 return; 1130 legacy_probe_add(ide_port[r & 0x01], 14 + (r & 0x01), 1131 QDI6500, port); 1132 } 1133 if (((r & 0xF0) == 0xA0) || (r & 0xF0) == 0x50) { 1134 /* QD6580: dual channel */ 1135 if (!request_region(port + 2 , 2, "pata_qdi")) { 1136 release_region(port, 2); 1137 return; 1138 } 1139 res = inb(port + 3); 1140 /* Single channel mode ? */ 1141 if (res & 1) 1142 legacy_probe_add(ide_port[r & 0x01], 14 + (r & 0x01), 1143 QDI6580, port); 1144 else { /* Dual channel mode */ 1145 legacy_probe_add(0x1F0, 14, QDI6580DP, port); 1146 /* port + 0x02, r & 0x04 */ 1147 legacy_probe_add(0x170, 15, QDI6580DP, port + 2); 1148 } 1149 release_region(port + 2, 2); 1150 } 1151} 1152 1153static __init void probe_qdi_vlb(void) 1154{ 1155 unsigned long flags; 1156 static const unsigned long qd_port[2] = { 0x30, 0xB0 }; 1157 int i; 1158 1159 /* 1160 * Check each possible QD65xx base address 1161 */ 1162 1163 for (i = 0; i < 2; i++) { 1164 unsigned long port = qd_port[i]; 1165 u8 r, res; 1166 1167 1168 if (request_region(port, 2, "pata_qdi")) { 1169 /* Check for a card */ 1170 local_irq_save(flags); 1171 /* I have no h/w that needs this delay but it 1172 is present in the historic code */ 1173 r = inb(port); 1174 udelay(1); 1175 outb(0x19, port); 1176 udelay(1); 1177 res = inb(port); 1178 udelay(1); 1179 outb(r, port); 1180 udelay(1); 1181 local_irq_restore(flags); 1182 1183 /* Fail */ 1184 if (res == 0x19) { 1185 release_region(port, 2); 1186 continue; 1187 } 1188 /* Passes the presence test */ 1189 r = inb(port + 1); 1190 udelay(1); 1191 /* Check port agrees with port set */ 1192 if ((r & 2) >> 1 == i) 1193 qdi65_identify_port(r, res, port); 1194 release_region(port, 2); 1195 } 1196 } 1197} 1198 1199/** 1200 * legacy_init - attach legacy interfaces 1201 * 1202 * Attach legacy IDE interfaces by scanning the usual IRQ/port suspects. 1203 * Right now we do not scan the ide0 and ide1 address but should do so 1204 * for non PCI systems or systems with no PCI IDE legacy mode devices. 1205 * If you fix that note there are special cases to consider like VLB 1206 * drivers and CS5510/20. 1207 */ 1208 1209static __init int legacy_init(void) 1210{ 1211 int i; 1212 int ct = 0; 1213 int primary = 0; 1214 int secondary = 0; 1215 int pci_present = 0; 1216 struct legacy_probe *pl = &probe_list[0]; 1217 int slot = 0; 1218 1219 struct pci_dev *p = NULL; 1220 1221 for_each_pci_dev(p) { 1222 int r; 1223 /* Check for any overlap of the system ATA mappings. Native 1224 mode controllers stuck on these addresses or some devices 1225 in 'raid' mode won't be found by the storage class test */ 1226 for (r = 0; r < 6; r++) { 1227 if (pci_resource_start(p, r) == 0x1f0) 1228 primary = 1; 1229 if (pci_resource_start(p, r) == 0x170) 1230 secondary = 1; 1231 } 1232 /* Check for special cases */ 1233 legacy_check_special_cases(p, &primary, &secondary); 1234 1235 /* If PCI bus is present then don't probe for tertiary 1236 legacy ports */ 1237 pci_present = 1; 1238 } 1239 1240 if (winbond == 1) 1241 winbond = 0x130; /* Default port, alt is 1B0 */ 1242 1243 if (primary == 0 || all) 1244 legacy_probe_add(0x1F0, 14, UNKNOWN, 0); 1245 if (secondary == 0 || all) 1246 legacy_probe_add(0x170, 15, UNKNOWN, 0); 1247 1248 if (probe_all || !pci_present) { 1249 /* ISA/VLB extra ports */ 1250 legacy_probe_add(0x1E8, 11, UNKNOWN, 0); 1251 legacy_probe_add(0x168, 10, UNKNOWN, 0); 1252 legacy_probe_add(0x1E0, 8, UNKNOWN, 0); 1253 legacy_probe_add(0x160, 12, UNKNOWN, 0); 1254 } 1255 1256 if (opti82c46x) 1257 probe_opti_vlb(); 1258 if (qdi) 1259 probe_qdi_vlb(); 1260 1261 for (i = 0; i < NR_HOST; i++, pl++) { 1262 if (pl->port == 0) 1263 continue; 1264 if (pl->type == UNKNOWN) 1265 pl->type = probe_chip_type(pl); 1266 pl->slot = slot++; 1267 if (legacy_init_one(pl) == 0) 1268 ct++; 1269 } 1270 if (ct != 0) 1271 return 0; 1272 return -ENODEV; 1273} 1274 1275static __exit void legacy_exit(void) 1276{ 1277 int i; 1278 1279 for (i = 0; i < nr_legacy_host; i++) { 1280 struct legacy_data *ld = &legacy_data[i]; 1281 ata_host_detach(legacy_host[i]); 1282 platform_device_unregister(ld->platform_dev); 1283 } 1284} 1285 1286MODULE_AUTHOR("Alan Cox"); 1287MODULE_DESCRIPTION("low-level driver for legacy ATA"); 1288MODULE_LICENSE("GPL"); 1289MODULE_VERSION(DRV_VERSION); 1290MODULE_ALIAS("pata_qdi"); 1291MODULE_ALIAS("pata_winbond"); 1292 1293module_init(legacy_init); 1294module_exit(legacy_exit); 1295