1 /* 2 * pdc_adma.c - Pacific Digital Corporation ADMA 3 * 4 * Maintained by: Mark Lord <mlord@pobox.com> 5 * 6 * Copyright 2005 Mark Lord 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2, or (at your option) 11 * any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; see the file COPYING. If not, write to 20 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 21 * 22 * 23 * libata documentation is available via 'make {ps|pdf}docs', 24 * as Documentation/DocBook/libata.* 25 * 26 * 27 * Supports ATA disks in single-packet ADMA mode. 28 * Uses PIO for everything else. 29 * 30 * TODO: Use ADMA transfers for ATAPI devices, when possible. 31 * This requires careful attention to a number of quirks of the chip. 32 * 33 */ 34 35 #include <linux/kernel.h> 36 #include <linux/module.h> 37 #include <linux/pci.h> 38 #include <linux/init.h> 39 #include <linux/blkdev.h> 40 #include <linux/delay.h> 41 #include <linux/interrupt.h> 42 #include <linux/device.h> 43 #include <scsi/scsi_host.h> 44 #include <linux/libata.h> 45 46 #define DRV_NAME "pdc_adma" 47 #define DRV_VERSION "1.0" 48 49 /* macro to calculate base address for ATA regs */ 50 #define ADMA_ATA_REGS(base,port_no) ((base) + ((port_no) * 0x40)) 51 52 /* macro to calculate base address for ADMA regs */ 53 #define ADMA_REGS(base,port_no) ((base) + 0x80 + ((port_no) * 0x20)) 54 55 /* macro to obtain addresses from ata_port */ 56 #define ADMA_PORT_REGS(ap) \ 57 ADMA_REGS((ap)->host->iomap[ADMA_MMIO_BAR], ap->port_no) 58 59 enum { 60 ADMA_MMIO_BAR = 4, 61 62 ADMA_PORTS = 2, 63 ADMA_CPB_BYTES = 40, 64 ADMA_PRD_BYTES = LIBATA_MAX_PRD * 16, 65 ADMA_PKT_BYTES = ADMA_CPB_BYTES + ADMA_PRD_BYTES, 66 67 ADMA_DMA_BOUNDARY = 0xffffffff, 68 69 /* global register offsets */ 70 ADMA_MODE_LOCK = 0x00c7, 71 72 /* per-channel register offsets */ 73 ADMA_CONTROL = 0x0000, /* ADMA control */ 74 ADMA_STATUS = 0x0002, /* ADMA status */ 75 ADMA_CPB_COUNT = 0x0004, /* CPB count */ 76 ADMA_CPB_CURRENT = 0x000c, /* current CPB address */ 77 ADMA_CPB_NEXT = 0x000c, /* next CPB address */ 78 ADMA_CPB_LOOKUP = 0x0010, /* CPB lookup table */ 79 ADMA_FIFO_IN = 0x0014, /* input FIFO threshold */ 80 ADMA_FIFO_OUT = 0x0016, /* output FIFO threshold */ 81 82 /* ADMA_CONTROL register bits */ 83 aNIEN = (1 << 8), /* irq mask: 1==masked */ 84 aGO = (1 << 7), /* packet trigger ("Go!") */ 85 aRSTADM = (1 << 5), /* ADMA logic reset */ 86 aPIOMD4 = 0x0003, /* PIO mode 4 */ 87 88 /* ADMA_STATUS register bits */ 89 aPSD = (1 << 6), 90 aUIRQ = (1 << 4), 91 aPERR = (1 << 0), 92 93 /* CPB bits */ 94 cDONE = (1 << 0), 95 cATERR = (1 << 3), 96 97 cVLD = (1 << 0), 98 cDAT = (1 << 2), 99 cIEN = (1 << 3), 100 101 /* PRD bits */ 102 pORD = (1 << 4), 103 pDIRO = (1 << 5), 104 pEND = (1 << 7), 105 106 /* ATA register flags */ 107 rIGN = (1 << 5), 108 rEND = (1 << 7), 109 110 /* ATA register addresses */ 111 ADMA_REGS_CONTROL = 0x0e, 112 ADMA_REGS_SECTOR_COUNT = 0x12, 113 ADMA_REGS_LBA_LOW = 0x13, 114 ADMA_REGS_LBA_MID = 0x14, 115 ADMA_REGS_LBA_HIGH = 0x15, 116 ADMA_REGS_DEVICE = 0x16, 117 ADMA_REGS_COMMAND = 0x17, 118 119 /* PCI device IDs */ 120 board_1841_idx = 0, /* ADMA 2-port controller */ 121 }; 122 123 typedef enum { adma_state_idle, adma_state_pkt, adma_state_mmio } adma_state_t; 124 125 struct adma_port_priv { 126 u8 *pkt; 127 dma_addr_t pkt_dma; 128 adma_state_t state; 129 }; 130 131 static int adma_ata_init_one (struct pci_dev *pdev, 132 const struct pci_device_id *ent); 133 static int adma_port_start(struct ata_port *ap); 134 static void adma_host_stop(struct ata_host *host); 135 static void adma_port_stop(struct ata_port *ap); 136 static void adma_qc_prep(struct ata_queued_cmd *qc); 137 static unsigned int adma_qc_issue(struct ata_queued_cmd *qc); 138 static int adma_check_atapi_dma(struct ata_queued_cmd *qc); 139 static void adma_bmdma_stop(struct ata_queued_cmd *qc); 140 static u8 adma_bmdma_status(struct ata_port *ap); 141 static void adma_irq_clear(struct ata_port *ap); 142 static void adma_freeze(struct ata_port *ap); 143 static void adma_thaw(struct ata_port *ap); 144 static void adma_error_handler(struct ata_port *ap); 145 146 static struct scsi_host_template adma_ata_sht = { 147 .module = THIS_MODULE, 148 .name = DRV_NAME, 149 .ioctl = ata_scsi_ioctl, 150 .queuecommand = ata_scsi_queuecmd, 151 .slave_configure = ata_scsi_slave_config, 152 .slave_destroy = ata_scsi_slave_destroy, 153 .bios_param = ata_std_bios_param, 154 .proc_name = DRV_NAME, 155 .can_queue = ATA_DEF_QUEUE, 156 .this_id = ATA_SHT_THIS_ID, 157 .sg_tablesize = LIBATA_MAX_PRD, 158 .dma_boundary = ADMA_DMA_BOUNDARY, 159 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 160 .use_clustering = ENABLE_CLUSTERING, 161 .emulated = ATA_SHT_EMULATED, 162 }; 163 164 static const struct ata_port_operations adma_ata_ops = { 165 .tf_load = ata_tf_load, 166 .tf_read = ata_tf_read, 167 .exec_command = ata_exec_command, 168 .check_status = ata_check_status, 169 .dev_select = ata_std_dev_select, 170 .check_atapi_dma = adma_check_atapi_dma, 171 .data_xfer = ata_data_xfer, 172 .qc_prep = adma_qc_prep, 173 .qc_issue = adma_qc_issue, 174 .freeze = adma_freeze, 175 .thaw = adma_thaw, 176 .error_handler = adma_error_handler, 177 .irq_clear = adma_irq_clear, 178 .irq_on = ata_irq_on, 179 .port_start = adma_port_start, 180 .port_stop = adma_port_stop, 181 .host_stop = adma_host_stop, 182 .bmdma_stop = adma_bmdma_stop, 183 .bmdma_status = adma_bmdma_status, 184 }; 185 186 static struct ata_port_info adma_port_info[] = { 187 /* board_1841_idx */ 188 { 189 .flags = ATA_FLAG_SLAVE_POSS | 190 ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | 191 ATA_FLAG_PIO_POLLING, 192 .pio_mask = 0x10, /* pio4 */ 193 .udma_mask = ATA_UDMA4, 194 .port_ops = &adma_ata_ops, 195 }, 196 }; 197 198 static const struct pci_device_id adma_ata_pci_tbl[] = { 199 { PCI_VDEVICE(PDC, 0x1841), board_1841_idx }, 200 201 { } /* terminate list */ 202 }; 203 204 static struct pci_driver adma_ata_pci_driver = { 205 .name = DRV_NAME, 206 .id_table = adma_ata_pci_tbl, 207 .probe = adma_ata_init_one, 208 .remove = ata_pci_remove_one, 209 }; 210 211 static int adma_check_atapi_dma(struct ata_queued_cmd *qc) 212 { 213 return 1; /* ATAPI DMA not yet supported */ 214 } 215 216 static void adma_bmdma_stop(struct ata_queued_cmd *qc) 217 { 218 /* nothing */ 219 } 220 221 static u8 adma_bmdma_status(struct ata_port *ap) 222 { 223 return 0; 224 } 225 226 static void adma_irq_clear(struct ata_port *ap) 227 { 228 /* nothing */ 229 } 230 231 static void adma_reset_engine(struct ata_port *ap) 232 { 233 void __iomem *chan = ADMA_PORT_REGS(ap); 234 235 /* reset ADMA to idle state */ 236 writew(aPIOMD4 | aNIEN | aRSTADM, chan + ADMA_CONTROL); 237 udelay(2); 238 writew(aPIOMD4, chan + ADMA_CONTROL); 239 udelay(2); 240 } 241 242 static void adma_reinit_engine(struct ata_port *ap) 243 { 244 struct adma_port_priv *pp = ap->private_data; 245 void __iomem *chan = ADMA_PORT_REGS(ap); 246 247 /* mask/clear ATA interrupts */ 248 writeb(ATA_NIEN, ap->ioaddr.ctl_addr); 249 ata_check_status(ap); 250 251 /* reset the ADMA engine */ 252 adma_reset_engine(ap); 253 254 /* set in-FIFO threshold to 0x100 */ 255 writew(0x100, chan + ADMA_FIFO_IN); 256 257 /* set CPB pointer */ 258 writel((u32)pp->pkt_dma, chan + ADMA_CPB_NEXT); 259 260 /* set out-FIFO threshold to 0x100 */ 261 writew(0x100, chan + ADMA_FIFO_OUT); 262 263 /* set CPB count */ 264 writew(1, chan + ADMA_CPB_COUNT); 265 266 /* read/discard ADMA status */ 267 readb(chan + ADMA_STATUS); 268 } 269 270 static inline void adma_enter_reg_mode(struct ata_port *ap) 271 { 272 void __iomem *chan = ADMA_PORT_REGS(ap); 273 274 writew(aPIOMD4, chan + ADMA_CONTROL); 275 readb(chan + ADMA_STATUS); /* flush */ 276 } 277 278 static void adma_freeze(struct ata_port *ap) 279 { 280 void __iomem *chan = ADMA_PORT_REGS(ap); 281 282 /* mask/clear ATA interrupts */ 283 writeb(ATA_NIEN, ap->ioaddr.ctl_addr); 284 ata_check_status(ap); 285 286 /* reset ADMA to idle state */ 287 writew(aPIOMD4 | aNIEN | aRSTADM, chan + ADMA_CONTROL); 288 udelay(2); 289 writew(aPIOMD4 | aNIEN, chan + ADMA_CONTROL); 290 udelay(2); 291 } 292 293 static void adma_thaw(struct ata_port *ap) 294 { 295 adma_reinit_engine(ap); 296 } 297 298 static int adma_prereset(struct ata_link *link, unsigned long deadline) 299 { 300 struct ata_port *ap = link->ap; 301 struct adma_port_priv *pp = ap->private_data; 302 303 if (pp->state != adma_state_idle) /* healthy paranoia */ 304 pp->state = adma_state_mmio; 305 adma_reinit_engine(ap); 306 307 return ata_std_prereset(link, deadline); 308 } 309 310 static void adma_error_handler(struct ata_port *ap) 311 { 312 ata_do_eh(ap, adma_prereset, ata_std_softreset, NULL, 313 ata_std_postreset); 314 } 315 316 static int adma_fill_sg(struct ata_queued_cmd *qc) 317 { 318 struct scatterlist *sg; 319 struct ata_port *ap = qc->ap; 320 struct adma_port_priv *pp = ap->private_data; 321 u8 *buf = pp->pkt; 322 int i = (2 + buf[3]) * 8; 323 u8 pFLAGS = pORD | ((qc->tf.flags & ATA_TFLAG_WRITE) ? pDIRO : 0); 324 325 ata_for_each_sg(sg, qc) { 326 u32 addr; 327 u32 len; 328 329 addr = (u32)sg_dma_address(sg); 330 *(__le32 *)(buf + i) = cpu_to_le32(addr); 331 i += 4; 332 333 len = sg_dma_len(sg) >> 3; 334 *(__le32 *)(buf + i) = cpu_to_le32(len); 335 i += 4; 336 337 if (ata_sg_is_last(sg, qc)) 338 pFLAGS |= pEND; 339 buf[i++] = pFLAGS; 340 buf[i++] = qc->dev->dma_mode & 0xf; 341 buf[i++] = 0; /* pPKLW */ 342 buf[i++] = 0; /* reserved */ 343 344 *(__le32 *)(buf + i) 345 = (pFLAGS & pEND) ? 0 : cpu_to_le32(pp->pkt_dma + i + 4); 346 i += 4; 347 348 VPRINTK("PRD[%u] = (0x%lX, 0x%X)\n", i/4, 349 (unsigned long)addr, len); 350 } 351 return i; 352 } 353 354 static void adma_qc_prep(struct ata_queued_cmd *qc) 355 { 356 struct adma_port_priv *pp = qc->ap->private_data; 357 u8 *buf = pp->pkt; 358 u32 pkt_dma = (u32)pp->pkt_dma; 359 int i = 0; 360 361 VPRINTK("ENTER\n"); 362 363 adma_enter_reg_mode(qc->ap); 364 if (qc->tf.protocol != ATA_PROT_DMA) { 365 ata_qc_prep(qc); 366 return; 367 } 368 369 buf[i++] = 0; /* Response flags */ 370 buf[i++] = 0; /* reserved */ 371 buf[i++] = cVLD | cDAT | cIEN; 372 i++; /* cLEN, gets filled in below */ 373 374 *(__le32 *)(buf+i) = cpu_to_le32(pkt_dma); /* cNCPB */ 375 i += 4; /* cNCPB */ 376 i += 4; /* cPRD, gets filled in below */ 377 378 buf[i++] = 0; /* reserved */ 379 buf[i++] = 0; /* reserved */ 380 buf[i++] = 0; /* reserved */ 381 buf[i++] = 0; /* reserved */ 382 383 /* ATA registers; must be a multiple of 4 */ 384 buf[i++] = qc->tf.device; 385 buf[i++] = ADMA_REGS_DEVICE; 386 if ((qc->tf.flags & ATA_TFLAG_LBA48)) { 387 buf[i++] = qc->tf.hob_nsect; 388 buf[i++] = ADMA_REGS_SECTOR_COUNT; 389 buf[i++] = qc->tf.hob_lbal; 390 buf[i++] = ADMA_REGS_LBA_LOW; 391 buf[i++] = qc->tf.hob_lbam; 392 buf[i++] = ADMA_REGS_LBA_MID; 393 buf[i++] = qc->tf.hob_lbah; 394 buf[i++] = ADMA_REGS_LBA_HIGH; 395 } 396 buf[i++] = qc->tf.nsect; 397 buf[i++] = ADMA_REGS_SECTOR_COUNT; 398 buf[i++] = qc->tf.lbal; 399 buf[i++] = ADMA_REGS_LBA_LOW; 400 buf[i++] = qc->tf.lbam; 401 buf[i++] = ADMA_REGS_LBA_MID; 402 buf[i++] = qc->tf.lbah; 403 buf[i++] = ADMA_REGS_LBA_HIGH; 404 buf[i++] = 0; 405 buf[i++] = ADMA_REGS_CONTROL; 406 buf[i++] = rIGN; 407 buf[i++] = 0; 408 buf[i++] = qc->tf.command; 409 buf[i++] = ADMA_REGS_COMMAND | rEND; 410 411 buf[3] = (i >> 3) - 2; /* cLEN */ 412 *(__le32 *)(buf+8) = cpu_to_le32(pkt_dma + i); /* cPRD */ 413 414 i = adma_fill_sg(qc); 415 wmb(); /* flush PRDs and pkt to memory */ 416 #if 0 417 /* dump out CPB + PRDs for debug */ 418 { 419 int j, len = 0; 420 static char obuf[2048]; 421 for (j = 0; j < i; ++j) { 422 len += sprintf(obuf+len, "%02x ", buf[j]); 423 if ((j & 7) == 7) { 424 printk("%s\n", obuf); 425 len = 0; 426 } 427 } 428 if (len) 429 printk("%s\n", obuf); 430 } 431 #endif 432 } 433 434 static inline void adma_packet_start(struct ata_queued_cmd *qc) 435 { 436 struct ata_port *ap = qc->ap; 437 void __iomem *chan = ADMA_PORT_REGS(ap); 438 439 VPRINTK("ENTER, ap %p\n", ap); 440 441 /* fire up the ADMA engine */ 442 writew(aPIOMD4 | aGO, chan + ADMA_CONTROL); 443 } 444 445 static unsigned int adma_qc_issue(struct ata_queued_cmd *qc) 446 { 447 struct adma_port_priv *pp = qc->ap->private_data; 448 449 switch (qc->tf.protocol) { 450 case ATA_PROT_DMA: 451 pp->state = adma_state_pkt; 452 adma_packet_start(qc); 453 return 0; 454 455 case ATA_PROT_ATAPI_DMA: 456 BUG(); 457 break; 458 459 default: 460 break; 461 } 462 463 pp->state = adma_state_mmio; 464 return ata_qc_issue_prot(qc); 465 } 466 467 static inline unsigned int adma_intr_pkt(struct ata_host *host) 468 { 469 unsigned int handled = 0, port_no; 470 471 for (port_no = 0; port_no < host->n_ports; ++port_no) { 472 struct ata_port *ap = host->ports[port_no]; 473 struct adma_port_priv *pp; 474 struct ata_queued_cmd *qc; 475 void __iomem *chan = ADMA_PORT_REGS(ap); 476 u8 status = readb(chan + ADMA_STATUS); 477 478 if (status == 0) 479 continue; 480 handled = 1; 481 adma_enter_reg_mode(ap); 482 if (ap->flags & ATA_FLAG_DISABLED) 483 continue; 484 pp = ap->private_data; 485 if (!pp || pp->state != adma_state_pkt) 486 continue; 487 qc = ata_qc_from_tag(ap, ap->link.active_tag); 488 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) { 489 if (status & aPERR) 490 qc->err_mask |= AC_ERR_HOST_BUS; 491 else if ((status & (aPSD | aUIRQ))) 492 qc->err_mask |= AC_ERR_OTHER; 493 494 if (pp->pkt[0] & cATERR) 495 qc->err_mask |= AC_ERR_DEV; 496 else if (pp->pkt[0] != cDONE) 497 qc->err_mask |= AC_ERR_OTHER; 498 499 if (!qc->err_mask) 500 ata_qc_complete(qc); 501 else { 502 struct ata_eh_info *ehi = &ap->link.eh_info; 503 ata_ehi_clear_desc(ehi); 504 ata_ehi_push_desc(ehi, 505 "ADMA-status 0x%02X", status); 506 ata_ehi_push_desc(ehi, 507 "pkt[0] 0x%02X", pp->pkt[0]); 508 509 if (qc->err_mask == AC_ERR_DEV) 510 ata_port_abort(ap); 511 else 512 ata_port_freeze(ap); 513 } 514 } 515 } 516 return handled; 517 } 518 519 static inline unsigned int adma_intr_mmio(struct ata_host *host) 520 { 521 unsigned int handled = 0, port_no; 522 523 for (port_no = 0; port_no < host->n_ports; ++port_no) { 524 struct ata_port *ap; 525 ap = host->ports[port_no]; 526 if (ap && (!(ap->flags & ATA_FLAG_DISABLED))) { 527 struct ata_queued_cmd *qc; 528 struct adma_port_priv *pp = ap->private_data; 529 if (!pp || pp->state != adma_state_mmio) 530 continue; 531 qc = ata_qc_from_tag(ap, ap->link.active_tag); 532 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) { 533 534 /* check main status, clearing INTRQ */ 535 u8 status = ata_check_status(ap); 536 if ((status & ATA_BUSY)) 537 continue; 538 DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n", 539 ap->print_id, qc->tf.protocol, status); 540 541 /* complete taskfile transaction */ 542 pp->state = adma_state_idle; 543 qc->err_mask |= ac_err_mask(status); 544 if (!qc->err_mask) 545 ata_qc_complete(qc); 546 else { 547 struct ata_eh_info *ehi = 548 &ap->link.eh_info; 549 ata_ehi_clear_desc(ehi); 550 ata_ehi_push_desc(ehi, 551 "status 0x%02X", status); 552 553 if (qc->err_mask == AC_ERR_DEV) 554 ata_port_abort(ap); 555 else 556 ata_port_freeze(ap); 557 } 558 handled = 1; 559 } 560 } 561 } 562 return handled; 563 } 564 565 static irqreturn_t adma_intr(int irq, void *dev_instance) 566 { 567 struct ata_host *host = dev_instance; 568 unsigned int handled = 0; 569 570 VPRINTK("ENTER\n"); 571 572 spin_lock(&host->lock); 573 handled = adma_intr_pkt(host) | adma_intr_mmio(host); 574 spin_unlock(&host->lock); 575 576 VPRINTK("EXIT\n"); 577 578 return IRQ_RETVAL(handled); 579 } 580 581 static void adma_ata_setup_port(struct ata_ioports *port, void __iomem *base) 582 { 583 port->cmd_addr = 584 port->data_addr = base + 0x000; 585 port->error_addr = 586 port->feature_addr = base + 0x004; 587 port->nsect_addr = base + 0x008; 588 port->lbal_addr = base + 0x00c; 589 port->lbam_addr = base + 0x010; 590 port->lbah_addr = base + 0x014; 591 port->device_addr = base + 0x018; 592 port->status_addr = 593 port->command_addr = base + 0x01c; 594 port->altstatus_addr = 595 port->ctl_addr = base + 0x038; 596 } 597 598 static int adma_port_start(struct ata_port *ap) 599 { 600 struct device *dev = ap->host->dev; 601 struct adma_port_priv *pp; 602 int rc; 603 604 rc = ata_port_start(ap); 605 if (rc) 606 return rc; 607 adma_enter_reg_mode(ap); 608 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); 609 if (!pp) 610 return -ENOMEM; 611 pp->pkt = dmam_alloc_coherent(dev, ADMA_PKT_BYTES, &pp->pkt_dma, 612 GFP_KERNEL); 613 if (!pp->pkt) 614 return -ENOMEM; 615 /* paranoia? */ 616 if ((pp->pkt_dma & 7) != 0) { 617 printk("bad alignment for pp->pkt_dma: %08x\n", 618 (u32)pp->pkt_dma); 619 return -ENOMEM; 620 } 621 memset(pp->pkt, 0, ADMA_PKT_BYTES); 622 ap->private_data = pp; 623 adma_reinit_engine(ap); 624 return 0; 625 } 626 627 static void adma_port_stop(struct ata_port *ap) 628 { 629 adma_reset_engine(ap); 630 } 631 632 static void adma_host_stop(struct ata_host *host) 633 { 634 unsigned int port_no; 635 636 for (port_no = 0; port_no < ADMA_PORTS; ++port_no) 637 adma_reset_engine(host->ports[port_no]); 638 } 639 640 static void adma_host_init(struct ata_host *host, unsigned int chip_id) 641 { 642 unsigned int port_no; 643 644 /* enable/lock aGO operation */ 645 writeb(7, host->iomap[ADMA_MMIO_BAR] + ADMA_MODE_LOCK); 646 647 /* reset the ADMA logic */ 648 for (port_no = 0; port_no < ADMA_PORTS; ++port_no) 649 adma_reset_engine(host->ports[port_no]); 650 } 651 652 static int adma_set_dma_masks(struct pci_dev *pdev, void __iomem *mmio_base) 653 { 654 int rc; 655 656 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK); 657 if (rc) { 658 dev_printk(KERN_ERR, &pdev->dev, 659 "32-bit DMA enable failed\n"); 660 return rc; 661 } 662 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); 663 if (rc) { 664 dev_printk(KERN_ERR, &pdev->dev, 665 "32-bit consistent DMA enable failed\n"); 666 return rc; 667 } 668 return 0; 669 } 670 671 static int adma_ata_init_one(struct pci_dev *pdev, 672 const struct pci_device_id *ent) 673 { 674 static int printed_version; 675 unsigned int board_idx = (unsigned int) ent->driver_data; 676 const struct ata_port_info *ppi[] = { &adma_port_info[board_idx], NULL }; 677 struct ata_host *host; 678 void __iomem *mmio_base; 679 int rc, port_no; 680 681 if (!printed_version++) 682 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); 683 684 /* alloc host */ 685 host = ata_host_alloc_pinfo(&pdev->dev, ppi, ADMA_PORTS); 686 if (!host) 687 return -ENOMEM; 688 689 /* acquire resources and fill host */ 690 rc = pcim_enable_device(pdev); 691 if (rc) 692 return rc; 693 694 if ((pci_resource_flags(pdev, 4) & IORESOURCE_MEM) == 0) 695 return -ENODEV; 696 697 rc = pcim_iomap_regions(pdev, 1 << ADMA_MMIO_BAR, DRV_NAME); 698 if (rc) 699 return rc; 700 host->iomap = pcim_iomap_table(pdev); 701 mmio_base = host->iomap[ADMA_MMIO_BAR]; 702 703 rc = adma_set_dma_masks(pdev, mmio_base); 704 if (rc) 705 return rc; 706 707 for (port_no = 0; port_no < ADMA_PORTS; ++port_no) { 708 struct ata_port *ap = host->ports[port_no]; 709 void __iomem *port_base = ADMA_ATA_REGS(mmio_base, port_no); 710 unsigned int offset = port_base - mmio_base; 711 712 adma_ata_setup_port(&ap->ioaddr, port_base); 713 714 ata_port_pbar_desc(ap, ADMA_MMIO_BAR, -1, "mmio"); 715 ata_port_pbar_desc(ap, ADMA_MMIO_BAR, offset, "port"); 716 } 717 718 /* initialize adapter */ 719 adma_host_init(host, board_idx); 720 721 pci_set_master(pdev); 722 return ata_host_activate(host, pdev->irq, adma_intr, IRQF_SHARED, 723 &adma_ata_sht); 724 } 725 726 static int __init adma_ata_init(void) 727 { 728 return pci_register_driver(&adma_ata_pci_driver); 729 } 730 731 static void __exit adma_ata_exit(void) 732 { 733 pci_unregister_driver(&adma_ata_pci_driver); 734 } 735 736 MODULE_AUTHOR("Mark Lord"); 737 MODULE_DESCRIPTION("Pacific Digital Corporation ADMA low-level driver"); 738 MODULE_LICENSE("GPL"); 739 MODULE_DEVICE_TABLE(pci, adma_ata_pci_tbl); 740 MODULE_VERSION(DRV_VERSION); 741 742 module_init(adma_ata_init); 743 module_exit(adma_ata_exit); 744