1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * sata_inic162x.c - Driver for Initio 162x SATA controllers 4 * 5 * Copyright 2006 SUSE Linux Products GmbH 6 * Copyright 2006 Tejun Heo <teheo@novell.com> 7 * 8 * **** WARNING **** 9 * 10 * This driver never worked properly and unfortunately data corruption is 11 * relatively common. There isn't anyone working on the driver and there's 12 * no support from the vendor. Do not use this driver in any production 13 * environment. 14 * 15 * http://thread.gmane.org/gmane.linux.debian.devel.bugs.rc/378525/focus=54491 16 * https://bugzilla.kernel.org/show_bug.cgi?id=60565 17 * 18 * ***************** 19 * 20 * This controller is eccentric and easily locks up if something isn't 21 * right. Documentation is available at initio's website but it only 22 * documents registers (not programming model). 23 * 24 * This driver has interesting history. The first version was written 25 * from the documentation and a 2.4 IDE driver posted on a Taiwan 26 * company, which didn't use any IDMA features and couldn't handle 27 * LBA48. The resulting driver couldn't handle LBA48 devices either 28 * making it pretty useless. 29 * 30 * After a while, initio picked the driver up, renamed it to 31 * sata_initio162x, updated it to use IDMA for ATA DMA commands and 32 * posted it on their website. It only used ATA_PROT_DMA for IDMA and 33 * attaching both devices and issuing IDMA and !IDMA commands 34 * simultaneously broke it due to PIRQ masking interaction but it did 35 * show how to use the IDMA (ADMA + some initio specific twists) 36 * engine. 37 * 38 * Then, I picked up their changes again and here's the usable driver 39 * which uses IDMA for everything. Everything works now including 40 * LBA48, CD/DVD burning, suspend/resume and hotplug. There are some 41 * issues tho. Result Tf is not resported properly, NCQ isn't 42 * supported yet and CD/DVD writing works with DMA assisted PIO 43 * protocol (which, for native SATA devices, shouldn't cause any 44 * noticeable difference). 45 * 46 * Anyways, so, here's finally a working driver for inic162x. Enjoy! 47 * 48 * initio: If you guys wanna improve the driver regarding result TF 49 * access and other stuff, please feel free to contact me. I'll be 50 * happy to assist. 51 */ 52 53 #include <linux/gfp.h> 54 #include <linux/kernel.h> 55 #include <linux/module.h> 56 #include <linux/pci.h> 57 #include <scsi/scsi_host.h> 58 #include <linux/libata.h> 59 #include <linux/blkdev.h> 60 #include <scsi/scsi_device.h> 61 62 #define DRV_NAME "sata_inic162x" 63 #define DRV_VERSION "0.4" 64 65 enum { 66 MMIO_BAR_PCI = 5, 67 MMIO_BAR_CARDBUS = 1, 68 69 NR_PORTS = 2, 70 71 IDMA_CPB_TBL_SIZE = 4 * 32, 72 73 INIC_DMA_BOUNDARY = 0xffffff, 74 75 HOST_ACTRL = 0x08, 76 HOST_CTL = 0x7c, 77 HOST_STAT = 0x7e, 78 HOST_IRQ_STAT = 0xbc, 79 HOST_IRQ_MASK = 0xbe, 80 81 PORT_SIZE = 0x40, 82 83 /* registers for ATA TF operation */ 84 PORT_TF_DATA = 0x00, 85 PORT_TF_FEATURE = 0x01, 86 PORT_TF_NSECT = 0x02, 87 PORT_TF_LBAL = 0x03, 88 PORT_TF_LBAM = 0x04, 89 PORT_TF_LBAH = 0x05, 90 PORT_TF_DEVICE = 0x06, 91 PORT_TF_COMMAND = 0x07, 92 PORT_TF_ALT_STAT = 0x08, 93 PORT_IRQ_STAT = 0x09, 94 PORT_IRQ_MASK = 0x0a, 95 PORT_PRD_CTL = 0x0b, 96 PORT_PRD_ADDR = 0x0c, 97 PORT_PRD_XFERLEN = 0x10, 98 PORT_CPB_CPBLAR = 0x18, 99 PORT_CPB_PTQFIFO = 0x1c, 100 101 /* IDMA register */ 102 PORT_IDMA_CTL = 0x14, 103 PORT_IDMA_STAT = 0x16, 104 105 PORT_RPQ_FIFO = 0x1e, 106 PORT_RPQ_CNT = 0x1f, 107 108 PORT_SCR = 0x20, 109 110 /* HOST_CTL bits */ 111 HCTL_LEDEN = (1 << 3), /* enable LED operation */ 112 HCTL_IRQOFF = (1 << 8), /* global IRQ off */ 113 HCTL_FTHD0 = (1 << 10), /* fifo threshold 0 */ 114 HCTL_FTHD1 = (1 << 11), /* fifo threshold 1*/ 115 HCTL_PWRDWN = (1 << 12), /* power down PHYs */ 116 HCTL_SOFTRST = (1 << 13), /* global reset (no phy reset) */ 117 HCTL_RPGSEL = (1 << 15), /* register page select */ 118 119 HCTL_KNOWN_BITS = HCTL_IRQOFF | HCTL_PWRDWN | HCTL_SOFTRST | 120 HCTL_RPGSEL, 121 122 /* HOST_IRQ_(STAT|MASK) bits */ 123 HIRQ_PORT0 = (1 << 0), 124 HIRQ_PORT1 = (1 << 1), 125 HIRQ_SOFT = (1 << 14), 126 HIRQ_GLOBAL = (1 << 15), /* STAT only */ 127 128 /* PORT_IRQ_(STAT|MASK) bits */ 129 PIRQ_OFFLINE = (1 << 0), /* device unplugged */ 130 PIRQ_ONLINE = (1 << 1), /* device plugged */ 131 PIRQ_COMPLETE = (1 << 2), /* completion interrupt */ 132 PIRQ_FATAL = (1 << 3), /* fatal error */ 133 PIRQ_ATA = (1 << 4), /* ATA interrupt */ 134 PIRQ_REPLY = (1 << 5), /* reply FIFO not empty */ 135 PIRQ_PENDING = (1 << 7), /* port IRQ pending (STAT only) */ 136 137 PIRQ_ERR = PIRQ_OFFLINE | PIRQ_ONLINE | PIRQ_FATAL, 138 PIRQ_MASK_DEFAULT = PIRQ_REPLY | PIRQ_ATA, 139 PIRQ_MASK_FREEZE = 0xff, 140 141 /* PORT_PRD_CTL bits */ 142 PRD_CTL_START = (1 << 0), 143 PRD_CTL_WR = (1 << 3), 144 PRD_CTL_DMAEN = (1 << 7), /* DMA enable */ 145 146 /* PORT_IDMA_CTL bits */ 147 IDMA_CTL_RST_ATA = (1 << 2), /* hardreset ATA bus */ 148 IDMA_CTL_RST_IDMA = (1 << 5), /* reset IDMA machinery */ 149 IDMA_CTL_GO = (1 << 7), /* IDMA mode go */ 150 IDMA_CTL_ATA_NIEN = (1 << 8), /* ATA IRQ disable */ 151 152 /* PORT_IDMA_STAT bits */ 153 IDMA_STAT_PERR = (1 << 0), /* PCI ERROR MODE */ 154 IDMA_STAT_CPBERR = (1 << 1), /* ADMA CPB error */ 155 IDMA_STAT_LGCY = (1 << 3), /* ADMA legacy */ 156 IDMA_STAT_UIRQ = (1 << 4), /* ADMA unsolicited irq */ 157 IDMA_STAT_STPD = (1 << 5), /* ADMA stopped */ 158 IDMA_STAT_PSD = (1 << 6), /* ADMA pause */ 159 IDMA_STAT_DONE = (1 << 7), /* ADMA done */ 160 161 IDMA_STAT_ERR = IDMA_STAT_PERR | IDMA_STAT_CPBERR, 162 163 /* CPB Control Flags*/ 164 CPB_CTL_VALID = (1 << 0), /* CPB valid */ 165 CPB_CTL_QUEUED = (1 << 1), /* queued command */ 166 CPB_CTL_DATA = (1 << 2), /* data, rsvd in datasheet */ 167 CPB_CTL_IEN = (1 << 3), /* PCI interrupt enable */ 168 CPB_CTL_DEVDIR = (1 << 4), /* device direction control */ 169 170 /* CPB Response Flags */ 171 CPB_RESP_DONE = (1 << 0), /* ATA command complete */ 172 CPB_RESP_REL = (1 << 1), /* ATA release */ 173 CPB_RESP_IGNORED = (1 << 2), /* CPB ignored */ 174 CPB_RESP_ATA_ERR = (1 << 3), /* ATA command error */ 175 CPB_RESP_SPURIOUS = (1 << 4), /* ATA spurious interrupt error */ 176 CPB_RESP_UNDERFLOW = (1 << 5), /* APRD deficiency length error */ 177 CPB_RESP_OVERFLOW = (1 << 6), /* APRD exccess length error */ 178 CPB_RESP_CPB_ERR = (1 << 7), /* CPB error flag */ 179 180 /* PRD Control Flags */ 181 PRD_DRAIN = (1 << 1), /* ignore data excess */ 182 PRD_CDB = (1 << 2), /* atapi packet command pointer */ 183 PRD_DIRECT_INTR = (1 << 3), /* direct interrupt */ 184 PRD_DMA = (1 << 4), /* data transfer method */ 185 PRD_WRITE = (1 << 5), /* data dir, rsvd in datasheet */ 186 PRD_IOM = (1 << 6), /* io/memory transfer */ 187 PRD_END = (1 << 7), /* APRD chain end */ 188 }; 189 190 /* Comman Parameter Block */ 191 struct inic_cpb { 192 u8 resp_flags; /* Response Flags */ 193 u8 error; /* ATA Error */ 194 u8 status; /* ATA Status */ 195 u8 ctl_flags; /* Control Flags */ 196 __le32 len; /* Total Transfer Length */ 197 __le32 prd; /* First PRD pointer */ 198 u8 rsvd[4]; 199 /* 16 bytes */ 200 u8 feature; /* ATA Feature */ 201 u8 hob_feature; /* ATA Ex. Feature */ 202 u8 device; /* ATA Device/Head */ 203 u8 mirctl; /* Mirror Control */ 204 u8 nsect; /* ATA Sector Count */ 205 u8 hob_nsect; /* ATA Ex. Sector Count */ 206 u8 lbal; /* ATA Sector Number */ 207 u8 hob_lbal; /* ATA Ex. Sector Number */ 208 u8 lbam; /* ATA Cylinder Low */ 209 u8 hob_lbam; /* ATA Ex. Cylinder Low */ 210 u8 lbah; /* ATA Cylinder High */ 211 u8 hob_lbah; /* ATA Ex. Cylinder High */ 212 u8 command; /* ATA Command */ 213 u8 ctl; /* ATA Control */ 214 u8 slave_error; /* Slave ATA Error */ 215 u8 slave_status; /* Slave ATA Status */ 216 /* 32 bytes */ 217 } __packed; 218 219 /* Physical Region Descriptor */ 220 struct inic_prd { 221 __le32 mad; /* Physical Memory Address */ 222 __le16 len; /* Transfer Length */ 223 u8 rsvd; 224 u8 flags; /* Control Flags */ 225 } __packed; 226 227 struct inic_pkt { 228 struct inic_cpb cpb; 229 struct inic_prd prd[LIBATA_MAX_PRD + 1]; /* + 1 for cdb */ 230 u8 cdb[ATAPI_CDB_LEN]; 231 } __packed; 232 233 struct inic_host_priv { 234 void __iomem *mmio_base; 235 u16 cached_hctl; 236 }; 237 238 struct inic_port_priv { 239 struct inic_pkt *pkt; 240 dma_addr_t pkt_dma; 241 u32 *cpb_tbl; 242 dma_addr_t cpb_tbl_dma; 243 }; 244 245 static struct scsi_host_template inic_sht = { 246 ATA_BASE_SHT(DRV_NAME), 247 .sg_tablesize = LIBATA_MAX_PRD, /* maybe it can be larger? */ 248 249 /* 250 * This controller is braindamaged. dma_boundary is 0xffff like others 251 * but it will lock up the whole machine HARD if 65536 byte PRD entry 252 * is fed. Reduce maximum segment size. 253 */ 254 .dma_boundary = INIC_DMA_BOUNDARY, 255 .max_segment_size = 65536 - 512, 256 }; 257 258 static const int scr_map[] = { 259 [SCR_STATUS] = 0, 260 [SCR_ERROR] = 1, 261 [SCR_CONTROL] = 2, 262 }; 263 264 static void __iomem *inic_port_base(struct ata_port *ap) 265 { 266 struct inic_host_priv *hpriv = ap->host->private_data; 267 268 return hpriv->mmio_base + ap->port_no * PORT_SIZE; 269 } 270 271 static void inic_reset_port(void __iomem *port_base) 272 { 273 void __iomem *idma_ctl = port_base + PORT_IDMA_CTL; 274 275 /* stop IDMA engine */ 276 readw(idma_ctl); /* flush */ 277 msleep(1); 278 279 /* mask IRQ and assert reset */ 280 writew(IDMA_CTL_RST_IDMA, idma_ctl); 281 readw(idma_ctl); /* flush */ 282 msleep(1); 283 284 /* release reset */ 285 writew(0, idma_ctl); 286 287 /* clear irq */ 288 writeb(0xff, port_base + PORT_IRQ_STAT); 289 } 290 291 static int inic_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val) 292 { 293 void __iomem *scr_addr = inic_port_base(link->ap) + PORT_SCR; 294 295 if (unlikely(sc_reg >= ARRAY_SIZE(scr_map))) 296 return -EINVAL; 297 298 *val = readl(scr_addr + scr_map[sc_reg] * 4); 299 300 /* this controller has stuck DIAG.N, ignore it */ 301 if (sc_reg == SCR_ERROR) 302 *val &= ~SERR_PHYRDY_CHG; 303 return 0; 304 } 305 306 static int inic_scr_write(struct ata_link *link, unsigned sc_reg, u32 val) 307 { 308 void __iomem *scr_addr = inic_port_base(link->ap) + PORT_SCR; 309 310 if (unlikely(sc_reg >= ARRAY_SIZE(scr_map))) 311 return -EINVAL; 312 313 writel(val, scr_addr + scr_map[sc_reg] * 4); 314 return 0; 315 } 316 317 static void inic_stop_idma(struct ata_port *ap) 318 { 319 void __iomem *port_base = inic_port_base(ap); 320 321 readb(port_base + PORT_RPQ_FIFO); 322 readb(port_base + PORT_RPQ_CNT); 323 writew(0, port_base + PORT_IDMA_CTL); 324 } 325 326 static void inic_host_err_intr(struct ata_port *ap, u8 irq_stat, u16 idma_stat) 327 { 328 struct ata_eh_info *ehi = &ap->link.eh_info; 329 struct inic_port_priv *pp = ap->private_data; 330 struct inic_cpb *cpb = &pp->pkt->cpb; 331 bool freeze = false; 332 333 ata_ehi_clear_desc(ehi); 334 ata_ehi_push_desc(ehi, "irq_stat=0x%x idma_stat=0x%x", 335 irq_stat, idma_stat); 336 337 inic_stop_idma(ap); 338 339 if (irq_stat & (PIRQ_OFFLINE | PIRQ_ONLINE)) { 340 ata_ehi_push_desc(ehi, "hotplug"); 341 ata_ehi_hotplugged(ehi); 342 freeze = true; 343 } 344 345 if (idma_stat & IDMA_STAT_PERR) { 346 ata_ehi_push_desc(ehi, "PCI error"); 347 freeze = true; 348 } 349 350 if (idma_stat & IDMA_STAT_CPBERR) { 351 ata_ehi_push_desc(ehi, "CPB error"); 352 353 if (cpb->resp_flags & CPB_RESP_IGNORED) { 354 __ata_ehi_push_desc(ehi, " ignored"); 355 ehi->err_mask |= AC_ERR_INVALID; 356 freeze = true; 357 } 358 359 if (cpb->resp_flags & CPB_RESP_ATA_ERR) 360 ehi->err_mask |= AC_ERR_DEV; 361 362 if (cpb->resp_flags & CPB_RESP_SPURIOUS) { 363 __ata_ehi_push_desc(ehi, " spurious-intr"); 364 ehi->err_mask |= AC_ERR_HSM; 365 freeze = true; 366 } 367 368 if (cpb->resp_flags & 369 (CPB_RESP_UNDERFLOW | CPB_RESP_OVERFLOW)) { 370 __ata_ehi_push_desc(ehi, " data-over/underflow"); 371 ehi->err_mask |= AC_ERR_HSM; 372 freeze = true; 373 } 374 } 375 376 if (freeze) 377 ata_port_freeze(ap); 378 else 379 ata_port_abort(ap); 380 } 381 382 static void inic_host_intr(struct ata_port *ap) 383 { 384 void __iomem *port_base = inic_port_base(ap); 385 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag); 386 u8 irq_stat; 387 u16 idma_stat; 388 389 /* read and clear IRQ status */ 390 irq_stat = readb(port_base + PORT_IRQ_STAT); 391 writeb(irq_stat, port_base + PORT_IRQ_STAT); 392 idma_stat = readw(port_base + PORT_IDMA_STAT); 393 394 if (unlikely((irq_stat & PIRQ_ERR) || (idma_stat & IDMA_STAT_ERR))) 395 inic_host_err_intr(ap, irq_stat, idma_stat); 396 397 if (unlikely(!qc)) 398 goto spurious; 399 400 if (likely(idma_stat & IDMA_STAT_DONE)) { 401 inic_stop_idma(ap); 402 403 /* Depending on circumstances, device error 404 * isn't reported by IDMA, check it explicitly. 405 */ 406 if (unlikely(readb(port_base + PORT_TF_COMMAND) & 407 (ATA_DF | ATA_ERR))) 408 qc->err_mask |= AC_ERR_DEV; 409 410 ata_qc_complete(qc); 411 return; 412 } 413 414 spurious: 415 ata_port_warn(ap, "unhandled interrupt: cmd=0x%x irq_stat=0x%x idma_stat=0x%x\n", 416 qc ? qc->tf.command : 0xff, irq_stat, idma_stat); 417 } 418 419 static irqreturn_t inic_interrupt(int irq, void *dev_instance) 420 { 421 struct ata_host *host = dev_instance; 422 struct inic_host_priv *hpriv = host->private_data; 423 u16 host_irq_stat; 424 int i, handled = 0; 425 426 host_irq_stat = readw(hpriv->mmio_base + HOST_IRQ_STAT); 427 428 if (unlikely(!(host_irq_stat & HIRQ_GLOBAL))) 429 goto out; 430 431 spin_lock(&host->lock); 432 433 for (i = 0; i < NR_PORTS; i++) 434 if (host_irq_stat & (HIRQ_PORT0 << i)) { 435 inic_host_intr(host->ports[i]); 436 handled++; 437 } 438 439 spin_unlock(&host->lock); 440 441 out: 442 return IRQ_RETVAL(handled); 443 } 444 445 static int inic_check_atapi_dma(struct ata_queued_cmd *qc) 446 { 447 /* For some reason ATAPI_PROT_DMA doesn't work for some 448 * commands including writes and other misc ops. Use PIO 449 * protocol instead, which BTW is driven by the DMA engine 450 * anyway, so it shouldn't make much difference for native 451 * SATA devices. 452 */ 453 if (atapi_cmd_type(qc->cdb[0]) == READ) 454 return 0; 455 return 1; 456 } 457 458 static void inic_fill_sg(struct inic_prd *prd, struct ata_queued_cmd *qc) 459 { 460 struct scatterlist *sg; 461 unsigned int si; 462 u8 flags = 0; 463 464 if (qc->tf.flags & ATA_TFLAG_WRITE) 465 flags |= PRD_WRITE; 466 467 if (ata_is_dma(qc->tf.protocol)) 468 flags |= PRD_DMA; 469 470 for_each_sg(qc->sg, sg, qc->n_elem, si) { 471 prd->mad = cpu_to_le32(sg_dma_address(sg)); 472 prd->len = cpu_to_le16(sg_dma_len(sg)); 473 prd->flags = flags; 474 prd++; 475 } 476 477 WARN_ON(!si); 478 prd[-1].flags |= PRD_END; 479 } 480 481 static enum ata_completion_errors inic_qc_prep(struct ata_queued_cmd *qc) 482 { 483 struct inic_port_priv *pp = qc->ap->private_data; 484 struct inic_pkt *pkt = pp->pkt; 485 struct inic_cpb *cpb = &pkt->cpb; 486 struct inic_prd *prd = pkt->prd; 487 bool is_atapi = ata_is_atapi(qc->tf.protocol); 488 bool is_data = ata_is_data(qc->tf.protocol); 489 unsigned int cdb_len = 0; 490 491 VPRINTK("ENTER\n"); 492 493 if (is_atapi) 494 cdb_len = qc->dev->cdb_len; 495 496 /* prepare packet, based on initio driver */ 497 memset(pkt, 0, sizeof(struct inic_pkt)); 498 499 cpb->ctl_flags = CPB_CTL_VALID | CPB_CTL_IEN; 500 if (is_atapi || is_data) 501 cpb->ctl_flags |= CPB_CTL_DATA; 502 503 cpb->len = cpu_to_le32(qc->nbytes + cdb_len); 504 cpb->prd = cpu_to_le32(pp->pkt_dma + offsetof(struct inic_pkt, prd)); 505 506 cpb->device = qc->tf.device; 507 cpb->feature = qc->tf.feature; 508 cpb->nsect = qc->tf.nsect; 509 cpb->lbal = qc->tf.lbal; 510 cpb->lbam = qc->tf.lbam; 511 cpb->lbah = qc->tf.lbah; 512 513 if (qc->tf.flags & ATA_TFLAG_LBA48) { 514 cpb->hob_feature = qc->tf.hob_feature; 515 cpb->hob_nsect = qc->tf.hob_nsect; 516 cpb->hob_lbal = qc->tf.hob_lbal; 517 cpb->hob_lbam = qc->tf.hob_lbam; 518 cpb->hob_lbah = qc->tf.hob_lbah; 519 } 520 521 cpb->command = qc->tf.command; 522 /* don't load ctl - dunno why. it's like that in the initio driver */ 523 524 /* setup PRD for CDB */ 525 if (is_atapi) { 526 memcpy(pkt->cdb, qc->cdb, ATAPI_CDB_LEN); 527 prd->mad = cpu_to_le32(pp->pkt_dma + 528 offsetof(struct inic_pkt, cdb)); 529 prd->len = cpu_to_le16(cdb_len); 530 prd->flags = PRD_CDB | PRD_WRITE; 531 if (!is_data) 532 prd->flags |= PRD_END; 533 prd++; 534 } 535 536 /* setup sg table */ 537 if (is_data) 538 inic_fill_sg(prd, qc); 539 540 pp->cpb_tbl[0] = pp->pkt_dma; 541 542 return AC_ERR_OK; 543 } 544 545 static unsigned int inic_qc_issue(struct ata_queued_cmd *qc) 546 { 547 struct ata_port *ap = qc->ap; 548 void __iomem *port_base = inic_port_base(ap); 549 550 /* fire up the ADMA engine */ 551 writew(HCTL_FTHD0 | HCTL_LEDEN, port_base + HOST_CTL); 552 writew(IDMA_CTL_GO, port_base + PORT_IDMA_CTL); 553 writeb(0, port_base + PORT_CPB_PTQFIFO); 554 555 return 0; 556 } 557 558 static void inic_tf_read(struct ata_port *ap, struct ata_taskfile *tf) 559 { 560 void __iomem *port_base = inic_port_base(ap); 561 562 tf->feature = readb(port_base + PORT_TF_FEATURE); 563 tf->nsect = readb(port_base + PORT_TF_NSECT); 564 tf->lbal = readb(port_base + PORT_TF_LBAL); 565 tf->lbam = readb(port_base + PORT_TF_LBAM); 566 tf->lbah = readb(port_base + PORT_TF_LBAH); 567 tf->device = readb(port_base + PORT_TF_DEVICE); 568 tf->command = readb(port_base + PORT_TF_COMMAND); 569 } 570 571 static bool inic_qc_fill_rtf(struct ata_queued_cmd *qc) 572 { 573 struct ata_taskfile *rtf = &qc->result_tf; 574 struct ata_taskfile tf; 575 576 /* FIXME: Except for status and error, result TF access 577 * doesn't work. I tried reading from BAR0/2, CPB and BAR5. 578 * None works regardless of which command interface is used. 579 * For now return true iff status indicates device error. 580 * This means that we're reporting bogus sector for RW 581 * failures. Eeekk.... 582 */ 583 inic_tf_read(qc->ap, &tf); 584 585 if (!(tf.command & ATA_ERR)) 586 return false; 587 588 rtf->command = tf.command; 589 rtf->feature = tf.feature; 590 return true; 591 } 592 593 static void inic_freeze(struct ata_port *ap) 594 { 595 void __iomem *port_base = inic_port_base(ap); 596 597 writeb(PIRQ_MASK_FREEZE, port_base + PORT_IRQ_MASK); 598 writeb(0xff, port_base + PORT_IRQ_STAT); 599 } 600 601 static void inic_thaw(struct ata_port *ap) 602 { 603 void __iomem *port_base = inic_port_base(ap); 604 605 writeb(0xff, port_base + PORT_IRQ_STAT); 606 writeb(PIRQ_MASK_DEFAULT, port_base + PORT_IRQ_MASK); 607 } 608 609 static int inic_check_ready(struct ata_link *link) 610 { 611 void __iomem *port_base = inic_port_base(link->ap); 612 613 return ata_check_ready(readb(port_base + PORT_TF_COMMAND)); 614 } 615 616 /* 617 * SRST and SControl hardreset don't give valid signature on this 618 * controller. Only controller specific hardreset mechanism works. 619 */ 620 static int inic_hardreset(struct ata_link *link, unsigned int *class, 621 unsigned long deadline) 622 { 623 struct ata_port *ap = link->ap; 624 void __iomem *port_base = inic_port_base(ap); 625 void __iomem *idma_ctl = port_base + PORT_IDMA_CTL; 626 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); 627 int rc; 628 629 /* hammer it into sane state */ 630 inic_reset_port(port_base); 631 632 writew(IDMA_CTL_RST_ATA, idma_ctl); 633 readw(idma_ctl); /* flush */ 634 ata_msleep(ap, 1); 635 writew(0, idma_ctl); 636 637 rc = sata_link_resume(link, timing, deadline); 638 if (rc) { 639 ata_link_warn(link, 640 "failed to resume link after reset (errno=%d)\n", 641 rc); 642 return rc; 643 } 644 645 *class = ATA_DEV_NONE; 646 if (ata_link_online(link)) { 647 struct ata_taskfile tf; 648 649 /* wait for link to become ready */ 650 rc = ata_wait_after_reset(link, deadline, inic_check_ready); 651 /* link occupied, -ENODEV too is an error */ 652 if (rc) { 653 ata_link_warn(link, 654 "device not ready after hardreset (errno=%d)\n", 655 rc); 656 return rc; 657 } 658 659 inic_tf_read(ap, &tf); 660 *class = ata_dev_classify(&tf); 661 } 662 663 return 0; 664 } 665 666 static void inic_error_handler(struct ata_port *ap) 667 { 668 void __iomem *port_base = inic_port_base(ap); 669 670 inic_reset_port(port_base); 671 ata_std_error_handler(ap); 672 } 673 674 static void inic_post_internal_cmd(struct ata_queued_cmd *qc) 675 { 676 /* make DMA engine forget about the failed command */ 677 if (qc->flags & ATA_QCFLAG_FAILED) 678 inic_reset_port(inic_port_base(qc->ap)); 679 } 680 681 static void init_port(struct ata_port *ap) 682 { 683 void __iomem *port_base = inic_port_base(ap); 684 struct inic_port_priv *pp = ap->private_data; 685 686 /* clear packet and CPB table */ 687 memset(pp->pkt, 0, sizeof(struct inic_pkt)); 688 memset(pp->cpb_tbl, 0, IDMA_CPB_TBL_SIZE); 689 690 /* setup CPB lookup table addresses */ 691 writel(pp->cpb_tbl_dma, port_base + PORT_CPB_CPBLAR); 692 } 693 694 static int inic_port_resume(struct ata_port *ap) 695 { 696 init_port(ap); 697 return 0; 698 } 699 700 static int inic_port_start(struct ata_port *ap) 701 { 702 struct device *dev = ap->host->dev; 703 struct inic_port_priv *pp; 704 705 /* alloc and initialize private data */ 706 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); 707 if (!pp) 708 return -ENOMEM; 709 ap->private_data = pp; 710 711 /* Alloc resources */ 712 pp->pkt = dmam_alloc_coherent(dev, sizeof(struct inic_pkt), 713 &pp->pkt_dma, GFP_KERNEL); 714 if (!pp->pkt) 715 return -ENOMEM; 716 717 pp->cpb_tbl = dmam_alloc_coherent(dev, IDMA_CPB_TBL_SIZE, 718 &pp->cpb_tbl_dma, GFP_KERNEL); 719 if (!pp->cpb_tbl) 720 return -ENOMEM; 721 722 init_port(ap); 723 724 return 0; 725 } 726 727 static struct ata_port_operations inic_port_ops = { 728 .inherits = &sata_port_ops, 729 730 .check_atapi_dma = inic_check_atapi_dma, 731 .qc_prep = inic_qc_prep, 732 .qc_issue = inic_qc_issue, 733 .qc_fill_rtf = inic_qc_fill_rtf, 734 735 .freeze = inic_freeze, 736 .thaw = inic_thaw, 737 .hardreset = inic_hardreset, 738 .error_handler = inic_error_handler, 739 .post_internal_cmd = inic_post_internal_cmd, 740 741 .scr_read = inic_scr_read, 742 .scr_write = inic_scr_write, 743 744 .port_resume = inic_port_resume, 745 .port_start = inic_port_start, 746 }; 747 748 static const struct ata_port_info inic_port_info = { 749 .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA, 750 .pio_mask = ATA_PIO4, 751 .mwdma_mask = ATA_MWDMA2, 752 .udma_mask = ATA_UDMA6, 753 .port_ops = &inic_port_ops 754 }; 755 756 static int init_controller(void __iomem *mmio_base, u16 hctl) 757 { 758 int i; 759 u16 val; 760 761 hctl &= ~HCTL_KNOWN_BITS; 762 763 /* Soft reset whole controller. Spec says reset duration is 3 764 * PCI clocks, be generous and give it 10ms. 765 */ 766 writew(hctl | HCTL_SOFTRST, mmio_base + HOST_CTL); 767 readw(mmio_base + HOST_CTL); /* flush */ 768 769 for (i = 0; i < 10; i++) { 770 msleep(1); 771 val = readw(mmio_base + HOST_CTL); 772 if (!(val & HCTL_SOFTRST)) 773 break; 774 } 775 776 if (val & HCTL_SOFTRST) 777 return -EIO; 778 779 /* mask all interrupts and reset ports */ 780 for (i = 0; i < NR_PORTS; i++) { 781 void __iomem *port_base = mmio_base + i * PORT_SIZE; 782 783 writeb(0xff, port_base + PORT_IRQ_MASK); 784 inic_reset_port(port_base); 785 } 786 787 /* port IRQ is masked now, unmask global IRQ */ 788 writew(hctl & ~HCTL_IRQOFF, mmio_base + HOST_CTL); 789 val = readw(mmio_base + HOST_IRQ_MASK); 790 val &= ~(HIRQ_PORT0 | HIRQ_PORT1); 791 writew(val, mmio_base + HOST_IRQ_MASK); 792 793 return 0; 794 } 795 796 #ifdef CONFIG_PM_SLEEP 797 static int inic_pci_device_resume(struct pci_dev *pdev) 798 { 799 struct ata_host *host = pci_get_drvdata(pdev); 800 struct inic_host_priv *hpriv = host->private_data; 801 int rc; 802 803 rc = ata_pci_device_do_resume(pdev); 804 if (rc) 805 return rc; 806 807 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) { 808 rc = init_controller(hpriv->mmio_base, hpriv->cached_hctl); 809 if (rc) 810 return rc; 811 } 812 813 ata_host_resume(host); 814 815 return 0; 816 } 817 #endif 818 819 static int inic_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 820 { 821 const struct ata_port_info *ppi[] = { &inic_port_info, NULL }; 822 struct ata_host *host; 823 struct inic_host_priv *hpriv; 824 void __iomem * const *iomap; 825 int mmio_bar; 826 int i, rc; 827 828 ata_print_version_once(&pdev->dev, DRV_VERSION); 829 830 dev_alert(&pdev->dev, "inic162x support is broken with common data corruption issues and will be disabled by default, contact linux-ide@vger.kernel.org if in production use\n"); 831 832 /* alloc host */ 833 host = ata_host_alloc_pinfo(&pdev->dev, ppi, NR_PORTS); 834 hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL); 835 if (!host || !hpriv) 836 return -ENOMEM; 837 838 host->private_data = hpriv; 839 840 /* Acquire resources and fill host. Note that PCI and cardbus 841 * use different BARs. 842 */ 843 rc = pcim_enable_device(pdev); 844 if (rc) 845 return rc; 846 847 if (pci_resource_flags(pdev, MMIO_BAR_PCI) & IORESOURCE_MEM) 848 mmio_bar = MMIO_BAR_PCI; 849 else 850 mmio_bar = MMIO_BAR_CARDBUS; 851 852 rc = pcim_iomap_regions(pdev, 1 << mmio_bar, DRV_NAME); 853 if (rc) 854 return rc; 855 host->iomap = iomap = pcim_iomap_table(pdev); 856 hpriv->mmio_base = iomap[mmio_bar]; 857 hpriv->cached_hctl = readw(hpriv->mmio_base + HOST_CTL); 858 859 for (i = 0; i < NR_PORTS; i++) { 860 struct ata_port *ap = host->ports[i]; 861 862 ata_port_pbar_desc(ap, mmio_bar, -1, "mmio"); 863 ata_port_pbar_desc(ap, mmio_bar, i * PORT_SIZE, "port"); 864 } 865 866 /* Set dma_mask. This devices doesn't support 64bit addressing. */ 867 rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 868 if (rc) { 869 dev_err(&pdev->dev, "32-bit DMA enable failed\n"); 870 return rc; 871 } 872 873 rc = init_controller(hpriv->mmio_base, hpriv->cached_hctl); 874 if (rc) { 875 dev_err(&pdev->dev, "failed to initialize controller\n"); 876 return rc; 877 } 878 879 pci_set_master(pdev); 880 return ata_host_activate(host, pdev->irq, inic_interrupt, IRQF_SHARED, 881 &inic_sht); 882 } 883 884 static const struct pci_device_id inic_pci_tbl[] = { 885 { PCI_VDEVICE(INIT, 0x1622), }, 886 { }, 887 }; 888 889 static struct pci_driver inic_pci_driver = { 890 .name = DRV_NAME, 891 .id_table = inic_pci_tbl, 892 #ifdef CONFIG_PM_SLEEP 893 .suspend = ata_pci_device_suspend, 894 .resume = inic_pci_device_resume, 895 #endif 896 .probe = inic_init_one, 897 .remove = ata_pci_remove_one, 898 }; 899 900 module_pci_driver(inic_pci_driver); 901 902 MODULE_AUTHOR("Tejun Heo"); 903 MODULE_DESCRIPTION("low-level driver for Initio 162x SATA"); 904 MODULE_LICENSE("GPL v2"); 905 MODULE_DEVICE_TABLE(pci, inic_pci_tbl); 906 MODULE_VERSION(DRV_VERSION); 907