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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 | // SPDX-License-Identifier: GPL-2.0-only /* * linux/drivers/acorn/scsi/eesox.c * * Copyright (C) 1997-2005 Russell King * * This driver is based on experimentation. Hence, it may have made * assumptions about the particular card that I have available, and * may not be reliable! * * Changelog: * 01-10-1997 RMK Created, READONLY version * 15-02-1998 RMK READ/WRITE version * added DMA support and hardware definitions * 14-03-1998 RMK Updated DMA support * Added terminator control * 15-04-1998 RMK Only do PIO if FAS216 will allow it. * 27-06-1998 RMK Changed asm/delay.h to linux/delay.h * 02-04-2000 RMK 0.0.3 Fixed NO_IRQ/NO_DMA problem, updated for new * error handling code. */ #include <linux/module.h> #include <linux/blkdev.h> #include <linux/kernel.h> #include <linux/string.h> #include <linux/ioport.h> #include <linux/proc_fs.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/init.h> #include <linux/dma-mapping.h> #include <linux/pgtable.h> #include <asm/io.h> #include <asm/dma.h> #include <asm/ecard.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi_device.h> #include <scsi/scsi_eh.h> #include <scsi/scsi_host.h> #include <scsi/scsi_tcq.h> #include "fas216.h" #include "arm_scsi.h" #include <scsi/scsicam.h> #define EESOX_FAS216_OFFSET 0x3000 #define EESOX_FAS216_SHIFT 5 #define EESOX_DMASTAT 0x2800 #define EESOX_STAT_INTR 0x01 #define EESOX_STAT_DMA 0x02 #define EESOX_CONTROL 0x2800 #define EESOX_INTR_ENABLE 0x04 #define EESOX_TERM_ENABLE 0x02 #define EESOX_RESET 0x01 #define EESOX_DMADATA 0x3800 #define VERSION "1.10 (17/01/2003 2.5.59)" /* * Use term=0,1,0,0,0 to turn terminators on/off */ static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 }; #define NR_SG 256 struct eesoxscsi_info { FAS216_Info info; struct expansion_card *ec; void __iomem *base; void __iomem *ctl_port; unsigned int control; struct scatterlist sg[NR_SG]; /* Scatter DMA list */ }; /* Prototype: void eesoxscsi_irqenable(ec, irqnr) * Purpose : Enable interrupts on EESOX SCSI card * Params : ec - expansion card structure * : irqnr - interrupt number */ static void eesoxscsi_irqenable(struct expansion_card *ec, int irqnr) { struct eesoxscsi_info *info = (struct eesoxscsi_info *)ec->irq_data; info->control |= EESOX_INTR_ENABLE; writeb(info->control, info->ctl_port); } /* Prototype: void eesoxscsi_irqdisable(ec, irqnr) * Purpose : Disable interrupts on EESOX SCSI card * Params : ec - expansion card structure * : irqnr - interrupt number */ static void eesoxscsi_irqdisable(struct expansion_card *ec, int irqnr) { struct eesoxscsi_info *info = (struct eesoxscsi_info *)ec->irq_data; info->control &= ~EESOX_INTR_ENABLE; writeb(info->control, info->ctl_port); } static const expansioncard_ops_t eesoxscsi_ops = { .irqenable = eesoxscsi_irqenable, .irqdisable = eesoxscsi_irqdisable, }; /* Prototype: void eesoxscsi_terminator_ctl(*host, on_off) * Purpose : Turn the EESOX SCSI terminators on or off * Params : host - card to turn on/off * : on_off - !0 to turn on, 0 to turn off */ static void eesoxscsi_terminator_ctl(struct Scsi_Host *host, int on_off) { struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; unsigned long flags; spin_lock_irqsave(host->host_lock, flags); if (on_off) info->control |= EESOX_TERM_ENABLE; else info->control &= ~EESOX_TERM_ENABLE; writeb(info->control, info->ctl_port); spin_unlock_irqrestore(host->host_lock, flags); } /* Prototype: void eesoxscsi_intr(irq, *dev_id, *regs) * Purpose : handle interrupts from EESOX SCSI card * Params : irq - interrupt number * dev_id - user-defined (Scsi_Host structure) */ static irqreturn_t eesoxscsi_intr(int irq, void *dev_id) { struct eesoxscsi_info *info = dev_id; return fas216_intr(&info->info); } /* Prototype: fasdmatype_t eesoxscsi_dma_setup(host, SCpnt, direction, min_type) * Purpose : initialises DMA/PIO * Params : host - host * SCpnt - command * direction - DMA on to/off of card * min_type - minimum DMA support that we must have for this transfer * Returns : type of transfer to be performed */ static fasdmatype_t eesoxscsi_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp, fasdmadir_t direction, fasdmatype_t min_type) { struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; struct device *dev = scsi_get_device(host); int dmach = info->info.scsi.dma; if (dmach != NO_DMA && (min_type == fasdma_real_all || SCp->this_residual >= 512)) { int bufs, map_dir, dma_dir; bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG); if (direction == DMA_OUT) { map_dir = DMA_TO_DEVICE; dma_dir = DMA_MODE_WRITE; } else { map_dir = DMA_FROM_DEVICE; dma_dir = DMA_MODE_READ; } dma_map_sg(dev, info->sg, bufs, map_dir); disable_dma(dmach); set_dma_sg(dmach, info->sg, bufs); set_dma_mode(dmach, dma_dir); enable_dma(dmach); return fasdma_real_all; } /* * We don't do DMA, we only do slow PIO * * Some day, we will do Pseudo DMA */ return fasdma_pseudo; } static void eesoxscsi_buffer_in(void *buf, int length, void __iomem *base) { const void __iomem *reg_fas = base + EESOX_FAS216_OFFSET; const void __iomem *reg_dmastat = base + EESOX_DMASTAT; const void __iomem *reg_dmadata = base + EESOX_DMADATA; register const unsigned long mask = 0xffff; do { unsigned int status; /* * Interrupt request? */ status = readb(reg_fas + (REG_STAT << EESOX_FAS216_SHIFT)); if (status & STAT_INT) break; /* * DMA request active? */ status = readb(reg_dmastat); if (!(status & EESOX_STAT_DMA)) continue; /* * Get number of bytes in FIFO */ status = readb(reg_fas + (REG_CFIS << EESOX_FAS216_SHIFT)) & CFIS_CF; if (status > 16) status = 16; if (status > length) status = length; /* * Align buffer. */ if (((u32)buf) & 2 && status >= 2) { *(u16 *)buf = readl(reg_dmadata); buf += 2; status -= 2; length -= 2; } if (status >= 8) { unsigned long l1, l2; l1 = readl(reg_dmadata) & mask; l1 |= readl(reg_dmadata) << 16; l2 = readl(reg_dmadata) & mask; l2 |= readl(reg_dmadata) << 16; *(u32 *)buf = l1; buf += 4; *(u32 *)buf = l2; buf += 4; length -= 8; continue; } if (status >= 4) { unsigned long l1; l1 = readl(reg_dmadata) & mask; l1 |= readl(reg_dmadata) << 16; *(u32 *)buf = l1; buf += 4; length -= 4; continue; } if (status >= 2) { *(u16 *)buf = readl(reg_dmadata); buf += 2; length -= 2; } } while (length); } static void eesoxscsi_buffer_out(void *buf, int length, void __iomem *base) { const void __iomem *reg_fas = base + EESOX_FAS216_OFFSET; const void __iomem *reg_dmastat = base + EESOX_DMASTAT; void __iomem *reg_dmadata = base + EESOX_DMADATA; do { unsigned int status; /* * Interrupt request? */ status = readb(reg_fas + (REG_STAT << EESOX_FAS216_SHIFT)); if (status & STAT_INT) break; /* * DMA request active? */ status = readb(reg_dmastat); if (!(status & EESOX_STAT_DMA)) continue; /* * Get number of bytes in FIFO */ status = readb(reg_fas + (REG_CFIS << EESOX_FAS216_SHIFT)) & CFIS_CF; if (status > 16) status = 16; status = 16 - status; if (status > length) status = length; status &= ~1; /* * Align buffer. */ if (((u32)buf) & 2 && status >= 2) { writel(*(u16 *)buf << 16, reg_dmadata); buf += 2; status -= 2; length -= 2; } if (status >= 8) { unsigned long l1, l2; l1 = *(u32 *)buf; buf += 4; l2 = *(u32 *)buf; buf += 4; writel(l1 << 16, reg_dmadata); writel(l1, reg_dmadata); writel(l2 << 16, reg_dmadata); writel(l2, reg_dmadata); length -= 8; continue; } if (status >= 4) { unsigned long l1; l1 = *(u32 *)buf; buf += 4; writel(l1 << 16, reg_dmadata); writel(l1, reg_dmadata); length -= 4; continue; } if (status >= 2) { writel(*(u16 *)buf << 16, reg_dmadata); buf += 2; length -= 2; } } while (length); } static void eesoxscsi_dma_pseudo(struct Scsi_Host *host, struct scsi_pointer *SCp, fasdmadir_t dir, int transfer_size) { struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; if (dir == DMA_IN) { eesoxscsi_buffer_in(SCp->ptr, SCp->this_residual, info->base); } else { eesoxscsi_buffer_out(SCp->ptr, SCp->this_residual, info->base); } } /* Prototype: int eesoxscsi_dma_stop(host, SCpnt) * Purpose : stops DMA/PIO * Params : host - host * SCpnt - command */ static void eesoxscsi_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp) { struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; if (info->info.scsi.dma != NO_DMA) disable_dma(info->info.scsi.dma); } /* Prototype: const char *eesoxscsi_info(struct Scsi_Host * host) * Purpose : returns a descriptive string about this interface, * Params : host - driver host structure to return info for. * Returns : pointer to a static buffer containing null terminated string. */ const char *eesoxscsi_info(struct Scsi_Host *host) { struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; static char string[150]; sprintf(string, "%s (%s) in slot %d v%s terminators o%s", host->hostt->name, info->info.scsi.type, info->ec->slot_no, VERSION, info->control & EESOX_TERM_ENABLE ? "n" : "ff"); return string; } /* Prototype: int eesoxscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length) * Purpose : Set a driver specific function * Params : host - host to setup * : buffer - buffer containing string describing operation * : length - length of string * Returns : -EINVAL, or 0 */ static int eesoxscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length) { int ret = length; if (length >= 9 && strncmp(buffer, "EESOXSCSI", 9) == 0) { buffer += 9; length -= 9; if (length >= 5 && strncmp(buffer, "term=", 5) == 0) { if (buffer[5] == '1') eesoxscsi_terminator_ctl(host, 1); else if (buffer[5] == '0') eesoxscsi_terminator_ctl(host, 0); else ret = -EINVAL; } else ret = -EINVAL; } else ret = -EINVAL; return ret; } static int eesoxscsi_show_info(struct seq_file *m, struct Scsi_Host *host) { struct eesoxscsi_info *info; info = (struct eesoxscsi_info *)host->hostdata; seq_printf(m, "EESOX SCSI driver v%s\n", VERSION); fas216_print_host(&info->info, m); seq_printf(m, "Term : o%s\n", info->control & EESOX_TERM_ENABLE ? "n" : "ff"); fas216_print_stats(&info->info, m); fas216_print_devices(&info->info, m); return 0; } static ssize_t eesoxscsi_show_term(struct device *dev, struct device_attribute *attr, char *buf) { struct expansion_card *ec = ECARD_DEV(dev); struct Scsi_Host *host = ecard_get_drvdata(ec); struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; return sprintf(buf, "%d\n", info->control & EESOX_TERM_ENABLE ? 1 : 0); } static ssize_t eesoxscsi_store_term(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct expansion_card *ec = ECARD_DEV(dev); struct Scsi_Host *host = ecard_get_drvdata(ec); struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; unsigned long flags; if (len > 1) { spin_lock_irqsave(host->host_lock, flags); if (buf[0] != '0') { info->control |= EESOX_TERM_ENABLE; } else { info->control &= ~EESOX_TERM_ENABLE; } writeb(info->control, info->ctl_port); spin_unlock_irqrestore(host->host_lock, flags); } return len; } static DEVICE_ATTR(bus_term, S_IRUGO | S_IWUSR, eesoxscsi_show_term, eesoxscsi_store_term); static const struct scsi_host_template eesox_template = { .module = THIS_MODULE, .show_info = eesoxscsi_show_info, .write_info = eesoxscsi_set_proc_info, .name = "EESOX SCSI", .info = eesoxscsi_info, .queuecommand = fas216_queue_command, .eh_host_reset_handler = fas216_eh_host_reset, .eh_bus_reset_handler = fas216_eh_bus_reset, .eh_device_reset_handler = fas216_eh_device_reset, .eh_abort_handler = fas216_eh_abort, .cmd_size = sizeof(struct fas216_cmd_priv), .can_queue = 1, .this_id = 7, .sg_tablesize = SG_MAX_SEGMENTS, .dma_boundary = IOMD_DMA_BOUNDARY, .proc_name = "eesox", }; static int eesoxscsi_probe(struct expansion_card *ec, const struct ecard_id *id) { struct Scsi_Host *host; struct eesoxscsi_info *info; void __iomem *base; int ret; ret = ecard_request_resources(ec); if (ret) goto out; base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); if (!base) { ret = -ENOMEM; goto out_region; } host = scsi_host_alloc(&eesox_template, sizeof(struct eesoxscsi_info)); if (!host) { ret = -ENOMEM; goto out_region; } ecard_set_drvdata(ec, host); info = (struct eesoxscsi_info *)host->hostdata; info->ec = ec; info->base = base; info->ctl_port = base + EESOX_CONTROL; info->control = term[ec->slot_no] ? EESOX_TERM_ENABLE : 0; writeb(info->control, info->ctl_port); info->info.scsi.io_base = base + EESOX_FAS216_OFFSET; info->info.scsi.io_shift = EESOX_FAS216_SHIFT; info->info.scsi.irq = ec->irq; info->info.scsi.dma = ec->dma; info->info.ifcfg.clockrate = 40; /* MHz */ info->info.ifcfg.select_timeout = 255; info->info.ifcfg.asyncperiod = 200; /* ns */ info->info.ifcfg.sync_max_depth = 7; info->info.ifcfg.cntl3 = CNTL3_FASTSCSI | CNTL3_FASTCLK; info->info.ifcfg.disconnect_ok = 1; info->info.ifcfg.wide_max_size = 0; info->info.ifcfg.capabilities = FASCAP_PSEUDODMA; info->info.dma.setup = eesoxscsi_dma_setup; info->info.dma.pseudo = eesoxscsi_dma_pseudo; info->info.dma.stop = eesoxscsi_dma_stop; ec->irqaddr = base + EESOX_DMASTAT; ec->irqmask = EESOX_STAT_INTR; ecard_setirq(ec, &eesoxscsi_ops, info); device_create_file(&ec->dev, &dev_attr_bus_term); ret = fas216_init(host); if (ret) goto out_free; ret = request_irq(ec->irq, eesoxscsi_intr, 0, "eesoxscsi", info); if (ret) { printk("scsi%d: IRQ%d not free: %d\n", host->host_no, ec->irq, ret); goto out_remove; } if (info->info.scsi.dma != NO_DMA) { if (request_dma(info->info.scsi.dma, "eesox")) { printk("scsi%d: DMA%d not free, DMA disabled\n", host->host_no, info->info.scsi.dma); info->info.scsi.dma = NO_DMA; } else { set_dma_speed(info->info.scsi.dma, 180); info->info.ifcfg.capabilities |= FASCAP_DMA; info->info.ifcfg.cntl3 |= CNTL3_BS8; } } ret = fas216_add(host, &ec->dev); if (ret == 0) goto out; if (info->info.scsi.dma != NO_DMA) free_dma(info->info.scsi.dma); free_irq(ec->irq, info); out_remove: fas216_remove(host); out_free: device_remove_file(&ec->dev, &dev_attr_bus_term); scsi_host_put(host); out_region: ecard_release_resources(ec); out: return ret; } static void eesoxscsi_remove(struct expansion_card *ec) { struct Scsi_Host *host = ecard_get_drvdata(ec); struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata; ecard_set_drvdata(ec, NULL); fas216_remove(host); if (info->info.scsi.dma != NO_DMA) free_dma(info->info.scsi.dma); free_irq(ec->irq, info); device_remove_file(&ec->dev, &dev_attr_bus_term); fas216_release(host); scsi_host_put(host); ecard_release_resources(ec); } static const struct ecard_id eesoxscsi_cids[] = { { MANU_EESOX, PROD_EESOX_SCSI2 }, { 0xffff, 0xffff }, }; static struct ecard_driver eesoxscsi_driver = { .probe = eesoxscsi_probe, .remove = eesoxscsi_remove, .id_table = eesoxscsi_cids, .drv = { .name = "eesoxscsi", }, }; static int __init eesox_init(void) { return ecard_register_driver(&eesoxscsi_driver); } static void __exit eesox_exit(void) { ecard_remove_driver(&eesoxscsi_driver); } module_init(eesox_init); module_exit(eesox_exit); MODULE_AUTHOR("Russell King"); MODULE_DESCRIPTION("EESOX 'Fast' SCSI driver for Acorn machines"); module_param_array(term, int, NULL, 0); MODULE_PARM_DESC(term, "SCSI bus termination"); MODULE_LICENSE("GPL"); |