1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Generic Generic NCR5380 driver 4 * 5 * Copyright 1993, Drew Eckhardt 6 * Visionary Computing 7 * (Unix and Linux consulting and custom programming) 8 * drew@colorado.edu 9 * +1 (303) 440-4894 10 * 11 * NCR53C400 extensions (c) 1994,1995,1996, Kevin Lentin 12 * K.Lentin@cs.monash.edu.au 13 * 14 * NCR53C400A extensions (c) 1996, Ingmar Baumgart 15 * ingmar@gonzo.schwaben.de 16 * 17 * DTC3181E extensions (c) 1997, Ronald van Cuijlenborg 18 * ronald.van.cuijlenborg@tip.nl or nutty@dds.nl 19 * 20 * Added ISAPNP support for DTC436 adapters, 21 * Thomas Sailer, sailer@ife.ee.ethz.ch 22 * 23 * See Documentation/scsi/g_NCR5380.txt for more info. 24 */ 25 26 #include <asm/io.h> 27 #include <linux/blkdev.h> 28 #include <linux/module.h> 29 #include <scsi/scsi_host.h> 30 #include <linux/init.h> 31 #include <linux/ioport.h> 32 #include <linux/isa.h> 33 #include <linux/pnp.h> 34 #include <linux/interrupt.h> 35 36 /* Definitions for the core NCR5380 driver. */ 37 38 #define NCR5380_read(reg) \ 39 ioread8(hostdata->io + hostdata->offset + (reg)) 40 #define NCR5380_write(reg, value) \ 41 iowrite8(value, hostdata->io + hostdata->offset + (reg)) 42 43 #define NCR5380_implementation_fields \ 44 int offset; \ 45 int c400_ctl_status; \ 46 int c400_blk_cnt; \ 47 int c400_host_buf; \ 48 int io_width; \ 49 int pdma_residual; \ 50 int board 51 52 #define NCR5380_dma_xfer_len generic_NCR5380_dma_xfer_len 53 #define NCR5380_dma_recv_setup generic_NCR5380_precv 54 #define NCR5380_dma_send_setup generic_NCR5380_psend 55 #define NCR5380_dma_residual generic_NCR5380_dma_residual 56 57 #define NCR5380_intr generic_NCR5380_intr 58 #define NCR5380_queue_command generic_NCR5380_queue_command 59 #define NCR5380_abort generic_NCR5380_abort 60 #define NCR5380_host_reset generic_NCR5380_host_reset 61 #define NCR5380_info generic_NCR5380_info 62 63 #define NCR5380_io_delay(x) udelay(x) 64 65 #include "NCR5380.h" 66 67 #define DRV_MODULE_NAME "g_NCR5380" 68 69 #define NCR53C400_mem_base 0x3880 70 #define NCR53C400_host_buffer 0x3900 71 #define NCR53C400_region_size 0x3a00 72 73 #define BOARD_NCR5380 0 74 #define BOARD_NCR53C400 1 75 #define BOARD_NCR53C400A 2 76 #define BOARD_DTC3181E 3 77 #define BOARD_HP_C2502 4 78 79 #define IRQ_AUTO 254 80 81 #define MAX_CARDS 8 82 #define DMA_MAX_SIZE 32768 83 84 /* old-style parameters for compatibility */ 85 static int ncr_irq = -1; 86 static int ncr_addr; 87 static int ncr_5380; 88 static int ncr_53c400; 89 static int ncr_53c400a; 90 static int dtc_3181e; 91 static int hp_c2502; 92 module_param_hw(ncr_irq, int, irq, 0); 93 module_param_hw(ncr_addr, int, ioport, 0); 94 module_param(ncr_5380, int, 0); 95 module_param(ncr_53c400, int, 0); 96 module_param(ncr_53c400a, int, 0); 97 module_param(dtc_3181e, int, 0); 98 module_param(hp_c2502, int, 0); 99 100 static int irq[] = { -1, -1, -1, -1, -1, -1, -1, -1 }; 101 module_param_hw_array(irq, int, irq, NULL, 0); 102 MODULE_PARM_DESC(irq, "IRQ number(s) (0=none, 254=auto [default])"); 103 104 static int base[] = { 0, 0, 0, 0, 0, 0, 0, 0 }; 105 module_param_hw_array(base, int, ioport, NULL, 0); 106 MODULE_PARM_DESC(base, "base address(es)"); 107 108 static int card[] = { -1, -1, -1, -1, -1, -1, -1, -1 }; 109 module_param_array(card, int, NULL, 0); 110 MODULE_PARM_DESC(card, "card type (0=NCR5380, 1=NCR53C400, 2=NCR53C400A, 3=DTC3181E, 4=HP C2502)"); 111 112 MODULE_ALIAS("g_NCR5380_mmio"); 113 MODULE_LICENSE("GPL"); 114 115 static void g_NCR5380_trigger_irq(struct Scsi_Host *instance) 116 { 117 struct NCR5380_hostdata *hostdata = shost_priv(instance); 118 119 /* 120 * An interrupt is triggered whenever BSY = false, SEL = true 121 * and a bit set in the SELECT_ENABLE_REG is asserted on the 122 * SCSI bus. 123 * 124 * Note that the bus is only driven when the phase control signals 125 * (I/O, C/D, and MSG) match those in the TCR. 126 */ 127 NCR5380_write(TARGET_COMMAND_REG, 128 PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG) & PHASE_MASK)); 129 NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); 130 NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask); 131 NCR5380_write(INITIATOR_COMMAND_REG, 132 ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_SEL); 133 134 msleep(1); 135 136 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); 137 NCR5380_write(SELECT_ENABLE_REG, 0); 138 NCR5380_write(TARGET_COMMAND_REG, 0); 139 } 140 141 /** 142 * g_NCR5380_probe_irq - find the IRQ of a NCR5380 or equivalent 143 * @instance: SCSI host instance 144 * 145 * Autoprobe for the IRQ line used by the card by triggering an IRQ 146 * and then looking to see what interrupt actually turned up. 147 */ 148 149 static int g_NCR5380_probe_irq(struct Scsi_Host *instance) 150 { 151 struct NCR5380_hostdata *hostdata = shost_priv(instance); 152 int irq_mask, irq; 153 154 NCR5380_read(RESET_PARITY_INTERRUPT_REG); 155 irq_mask = probe_irq_on(); 156 g_NCR5380_trigger_irq(instance); 157 irq = probe_irq_off(irq_mask); 158 NCR5380_read(RESET_PARITY_INTERRUPT_REG); 159 160 if (irq <= 0) 161 return NO_IRQ; 162 return irq; 163 } 164 165 /* 166 * Configure I/O address of 53C400A or DTC436 by writing magic numbers 167 * to ports 0x779 and 0x379. 168 */ 169 static void magic_configure(int idx, u8 irq, u8 magic[]) 170 { 171 u8 cfg = 0; 172 173 outb(magic[0], 0x779); 174 outb(magic[1], 0x379); 175 outb(magic[2], 0x379); 176 outb(magic[3], 0x379); 177 outb(magic[4], 0x379); 178 179 if (irq == 9) 180 irq = 2; 181 182 if (idx >= 0 && idx <= 7) 183 cfg = 0x80 | idx | (irq << 4); 184 outb(cfg, 0x379); 185 } 186 187 static irqreturn_t legacy_empty_irq_handler(int irq, void *dev_id) 188 { 189 return IRQ_HANDLED; 190 } 191 192 static int legacy_find_free_irq(int *irq_table) 193 { 194 while (*irq_table != -1) { 195 if (!request_irq(*irq_table, legacy_empty_irq_handler, 196 IRQF_PROBE_SHARED, "Test IRQ", 197 (void *)irq_table)) { 198 free_irq(*irq_table, (void *) irq_table); 199 return *irq_table; 200 } 201 irq_table++; 202 } 203 return -1; 204 } 205 206 static unsigned int ncr_53c400a_ports[] = { 207 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0 208 }; 209 static unsigned int dtc_3181e_ports[] = { 210 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0 211 }; 212 static u8 ncr_53c400a_magic[] = { /* 53C400A & DTC436 */ 213 0x59, 0xb9, 0xc5, 0xae, 0xa6 214 }; 215 static u8 hp_c2502_magic[] = { /* HP C2502 */ 216 0x0f, 0x22, 0xf0, 0x20, 0x80 217 }; 218 static int hp_c2502_irqs[] = { 219 9, 5, 7, 3, 4, -1 220 }; 221 222 static int generic_NCR5380_init_one(struct scsi_host_template *tpnt, 223 struct device *pdev, int base, int irq, int board) 224 { 225 bool is_pmio = base <= 0xffff; 226 int ret; 227 int flags = 0; 228 unsigned int *ports = NULL; 229 u8 *magic = NULL; 230 int i; 231 int port_idx = -1; 232 unsigned long region_size; 233 struct Scsi_Host *instance; 234 struct NCR5380_hostdata *hostdata; 235 u8 __iomem *iomem; 236 237 switch (board) { 238 case BOARD_NCR5380: 239 flags = FLAG_NO_PSEUDO_DMA | FLAG_DMA_FIXUP; 240 break; 241 case BOARD_NCR53C400A: 242 ports = ncr_53c400a_ports; 243 magic = ncr_53c400a_magic; 244 break; 245 case BOARD_HP_C2502: 246 ports = ncr_53c400a_ports; 247 magic = hp_c2502_magic; 248 break; 249 case BOARD_DTC3181E: 250 ports = dtc_3181e_ports; 251 magic = ncr_53c400a_magic; 252 break; 253 } 254 255 if (is_pmio && ports && magic) { 256 /* wakeup sequence for the NCR53C400A and DTC3181E */ 257 258 /* Disable the adapter and look for a free io port */ 259 magic_configure(-1, 0, magic); 260 261 region_size = 16; 262 if (base) 263 for (i = 0; ports[i]; i++) { 264 if (base == ports[i]) { /* index found */ 265 if (!request_region(ports[i], 266 region_size, 267 "ncr53c80")) 268 return -EBUSY; 269 break; 270 } 271 } 272 else 273 for (i = 0; ports[i]; i++) { 274 if (!request_region(ports[i], region_size, 275 "ncr53c80")) 276 continue; 277 if (inb(ports[i]) == 0xff) 278 break; 279 release_region(ports[i], region_size); 280 } 281 if (ports[i]) { 282 /* At this point we have our region reserved */ 283 magic_configure(i, 0, magic); /* no IRQ yet */ 284 base = ports[i]; 285 outb(0xc0, base + 9); 286 if (inb(base + 9) != 0x80) { 287 ret = -ENODEV; 288 goto out_release; 289 } 290 port_idx = i; 291 } else 292 return -EINVAL; 293 } else if (is_pmio) { 294 /* NCR5380 - no configuration, just grab */ 295 region_size = 8; 296 if (!base || !request_region(base, region_size, "ncr5380")) 297 return -EBUSY; 298 } else { /* MMIO */ 299 region_size = NCR53C400_region_size; 300 if (!request_mem_region(base, region_size, "ncr5380")) 301 return -EBUSY; 302 } 303 304 if (is_pmio) 305 iomem = ioport_map(base, region_size); 306 else 307 iomem = ioremap(base, region_size); 308 309 if (!iomem) { 310 ret = -ENOMEM; 311 goto out_release; 312 } 313 314 instance = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata)); 315 if (instance == NULL) { 316 ret = -ENOMEM; 317 goto out_unmap; 318 } 319 hostdata = shost_priv(instance); 320 321 hostdata->board = board; 322 hostdata->io = iomem; 323 hostdata->region_size = region_size; 324 325 if (is_pmio) { 326 hostdata->io_port = base; 327 hostdata->io_width = 1; /* 8-bit PDMA by default */ 328 hostdata->offset = 0; 329 330 /* 331 * On NCR53C400 boards, NCR5380 registers are mapped 8 past 332 * the base address. 333 */ 334 switch (board) { 335 case BOARD_NCR53C400: 336 hostdata->io_port += 8; 337 hostdata->c400_ctl_status = 0; 338 hostdata->c400_blk_cnt = 1; 339 hostdata->c400_host_buf = 4; 340 break; 341 case BOARD_DTC3181E: 342 hostdata->io_width = 2; /* 16-bit PDMA */ 343 /* fall through */ 344 case BOARD_NCR53C400A: 345 case BOARD_HP_C2502: 346 hostdata->c400_ctl_status = 9; 347 hostdata->c400_blk_cnt = 10; 348 hostdata->c400_host_buf = 8; 349 break; 350 } 351 } else { 352 hostdata->base = base; 353 hostdata->offset = NCR53C400_mem_base; 354 switch (board) { 355 case BOARD_NCR53C400: 356 hostdata->c400_ctl_status = 0x100; 357 hostdata->c400_blk_cnt = 0x101; 358 hostdata->c400_host_buf = 0x104; 359 break; 360 case BOARD_DTC3181E: 361 case BOARD_NCR53C400A: 362 case BOARD_HP_C2502: 363 pr_err(DRV_MODULE_NAME ": unknown register offsets\n"); 364 ret = -EINVAL; 365 goto out_unregister; 366 } 367 } 368 369 /* Check for vacant slot */ 370 NCR5380_write(MODE_REG, 0); 371 if (NCR5380_read(MODE_REG) != 0) { 372 ret = -ENODEV; 373 goto out_unregister; 374 } 375 376 ret = NCR5380_init(instance, flags | FLAG_LATE_DMA_SETUP); 377 if (ret) 378 goto out_unregister; 379 380 switch (board) { 381 case BOARD_NCR53C400: 382 case BOARD_DTC3181E: 383 case BOARD_NCR53C400A: 384 case BOARD_HP_C2502: 385 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE); 386 } 387 388 NCR5380_maybe_reset_bus(instance); 389 390 /* Compatibility with documented NCR5380 kernel parameters */ 391 if (irq == 255 || irq == 0) 392 irq = NO_IRQ; 393 else if (irq == -1) 394 irq = IRQ_AUTO; 395 396 if (board == BOARD_HP_C2502) { 397 int *irq_table = hp_c2502_irqs; 398 int board_irq = -1; 399 400 switch (irq) { 401 case NO_IRQ: 402 board_irq = 0; 403 break; 404 case IRQ_AUTO: 405 board_irq = legacy_find_free_irq(irq_table); 406 break; 407 default: 408 while (*irq_table != -1) 409 if (*irq_table++ == irq) 410 board_irq = irq; 411 } 412 413 if (board_irq <= 0) { 414 board_irq = 0; 415 irq = NO_IRQ; 416 } 417 418 magic_configure(port_idx, board_irq, magic); 419 } 420 421 if (irq == IRQ_AUTO) { 422 instance->irq = g_NCR5380_probe_irq(instance); 423 if (instance->irq == NO_IRQ) 424 shost_printk(KERN_INFO, instance, "no irq detected\n"); 425 } else { 426 instance->irq = irq; 427 if (instance->irq == NO_IRQ) 428 shost_printk(KERN_INFO, instance, "no irq provided\n"); 429 } 430 431 if (instance->irq != NO_IRQ) { 432 if (request_irq(instance->irq, generic_NCR5380_intr, 433 0, "NCR5380", instance)) { 434 instance->irq = NO_IRQ; 435 shost_printk(KERN_INFO, instance, 436 "irq %d denied\n", instance->irq); 437 } else { 438 shost_printk(KERN_INFO, instance, 439 "irq %d acquired\n", instance->irq); 440 } 441 } 442 443 ret = scsi_add_host(instance, pdev); 444 if (ret) 445 goto out_free_irq; 446 scsi_scan_host(instance); 447 dev_set_drvdata(pdev, instance); 448 return 0; 449 450 out_free_irq: 451 if (instance->irq != NO_IRQ) 452 free_irq(instance->irq, instance); 453 NCR5380_exit(instance); 454 out_unregister: 455 scsi_host_put(instance); 456 out_unmap: 457 iounmap(iomem); 458 out_release: 459 if (is_pmio) 460 release_region(base, region_size); 461 else 462 release_mem_region(base, region_size); 463 return ret; 464 } 465 466 static void generic_NCR5380_release_resources(struct Scsi_Host *instance) 467 { 468 struct NCR5380_hostdata *hostdata = shost_priv(instance); 469 void __iomem *iomem = hostdata->io; 470 unsigned long io_port = hostdata->io_port; 471 unsigned long base = hostdata->base; 472 unsigned long region_size = hostdata->region_size; 473 474 scsi_remove_host(instance); 475 if (instance->irq != NO_IRQ) 476 free_irq(instance->irq, instance); 477 NCR5380_exit(instance); 478 scsi_host_put(instance); 479 iounmap(iomem); 480 if (io_port) 481 release_region(io_port, region_size); 482 else 483 release_mem_region(base, region_size); 484 } 485 486 /* wait_for_53c80_access - wait for 53C80 registers to become accessible 487 * @hostdata: scsi host private data 488 * 489 * The registers within the 53C80 logic block are inaccessible until 490 * bit 7 in the 53C400 control status register gets asserted. 491 */ 492 493 static void wait_for_53c80_access(struct NCR5380_hostdata *hostdata) 494 { 495 int count = 10000; 496 497 do { 498 if (hostdata->board == BOARD_DTC3181E) 499 udelay(4); /* DTC436 chip hangs without this */ 500 if (NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG) 501 return; 502 } while (--count > 0); 503 504 scmd_printk(KERN_ERR, hostdata->connected, 505 "53c80 registers not accessible, device will be reset\n"); 506 NCR5380_write(hostdata->c400_ctl_status, CSR_RESET); 507 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE); 508 } 509 510 /** 511 * generic_NCR5380_precv - pseudo DMA receive 512 * @hostdata: scsi host private data 513 * @dst: buffer to write into 514 * @len: transfer size 515 * 516 * Perform a pseudo DMA mode receive from a 53C400 or equivalent device. 517 */ 518 519 static inline int generic_NCR5380_precv(struct NCR5380_hostdata *hostdata, 520 unsigned char *dst, int len) 521 { 522 int residual; 523 int start = 0; 524 525 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE | CSR_TRANS_DIR); 526 NCR5380_write(hostdata->c400_blk_cnt, len / 128); 527 528 do { 529 if (start == len - 128) { 530 /* Ignore End of DMA interrupt for the final buffer */ 531 if (NCR5380_poll_politely(hostdata, hostdata->c400_ctl_status, 532 CSR_HOST_BUF_NOT_RDY, 0, HZ / 64) < 0) 533 break; 534 } else { 535 if (NCR5380_poll_politely2(hostdata, hostdata->c400_ctl_status, 536 CSR_HOST_BUF_NOT_RDY, 0, 537 hostdata->c400_ctl_status, 538 CSR_GATED_53C80_IRQ, 539 CSR_GATED_53C80_IRQ, HZ / 64) < 0 || 540 NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) 541 break; 542 } 543 544 if (hostdata->io_port && hostdata->io_width == 2) 545 insw(hostdata->io_port + hostdata->c400_host_buf, 546 dst + start, 64); 547 else if (hostdata->io_port) 548 insb(hostdata->io_port + hostdata->c400_host_buf, 549 dst + start, 128); 550 else 551 memcpy_fromio(dst + start, 552 hostdata->io + NCR53C400_host_buffer, 128); 553 start += 128; 554 } while (start < len); 555 556 residual = len - start; 557 558 if (residual != 0) { 559 /* 53c80 interrupt or transfer timeout. Reset 53c400 logic. */ 560 NCR5380_write(hostdata->c400_ctl_status, CSR_RESET); 561 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE); 562 } 563 wait_for_53c80_access(hostdata); 564 565 if (residual == 0 && NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG, 566 BASR_END_DMA_TRANSFER, 567 BASR_END_DMA_TRANSFER, 568 HZ / 64) < 0) 569 scmd_printk(KERN_ERR, hostdata->connected, "%s: End of DMA timeout\n", 570 __func__); 571 572 hostdata->pdma_residual = residual; 573 574 return 0; 575 } 576 577 /** 578 * generic_NCR5380_psend - pseudo DMA send 579 * @hostdata: scsi host private data 580 * @src: buffer to read from 581 * @len: transfer size 582 * 583 * Perform a pseudo DMA mode send to a 53C400 or equivalent device. 584 */ 585 586 static inline int generic_NCR5380_psend(struct NCR5380_hostdata *hostdata, 587 unsigned char *src, int len) 588 { 589 int residual; 590 int start = 0; 591 592 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE); 593 NCR5380_write(hostdata->c400_blk_cnt, len / 128); 594 595 do { 596 if (NCR5380_poll_politely2(hostdata, hostdata->c400_ctl_status, 597 CSR_HOST_BUF_NOT_RDY, 0, 598 hostdata->c400_ctl_status, 599 CSR_GATED_53C80_IRQ, 600 CSR_GATED_53C80_IRQ, HZ / 64) < 0 || 601 NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) { 602 /* Both 128 B buffers are in use */ 603 if (start >= 128) 604 start -= 128; 605 if (start >= 128) 606 start -= 128; 607 break; 608 } 609 610 if (start >= len && NCR5380_read(hostdata->c400_blk_cnt) == 0) 611 break; 612 613 if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) { 614 /* Host buffer is empty, other one is in use */ 615 if (start >= 128) 616 start -= 128; 617 break; 618 } 619 620 if (start >= len) 621 continue; 622 623 if (hostdata->io_port && hostdata->io_width == 2) 624 outsw(hostdata->io_port + hostdata->c400_host_buf, 625 src + start, 64); 626 else if (hostdata->io_port) 627 outsb(hostdata->io_port + hostdata->c400_host_buf, 628 src + start, 128); 629 else 630 memcpy_toio(hostdata->io + NCR53C400_host_buffer, 631 src + start, 128); 632 start += 128; 633 } while (1); 634 635 residual = len - start; 636 637 if (residual != 0) { 638 /* 53c80 interrupt or transfer timeout. Reset 53c400 logic. */ 639 NCR5380_write(hostdata->c400_ctl_status, CSR_RESET); 640 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE); 641 } 642 wait_for_53c80_access(hostdata); 643 644 if (residual == 0) { 645 if (NCR5380_poll_politely(hostdata, TARGET_COMMAND_REG, 646 TCR_LAST_BYTE_SENT, TCR_LAST_BYTE_SENT, 647 HZ / 64) < 0) 648 scmd_printk(KERN_ERR, hostdata->connected, 649 "%s: Last Byte Sent timeout\n", __func__); 650 651 if (NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG, 652 BASR_END_DMA_TRANSFER, BASR_END_DMA_TRANSFER, 653 HZ / 64) < 0) 654 scmd_printk(KERN_ERR, hostdata->connected, "%s: End of DMA timeout\n", 655 __func__); 656 } 657 658 hostdata->pdma_residual = residual; 659 660 return 0; 661 } 662 663 static int generic_NCR5380_dma_xfer_len(struct NCR5380_hostdata *hostdata, 664 struct scsi_cmnd *cmd) 665 { 666 int transfersize = cmd->SCp.this_residual; 667 668 if (hostdata->flags & FLAG_NO_PSEUDO_DMA) 669 return 0; 670 671 /* 53C400 datasheet: non-modulo-128-byte transfers should use PIO */ 672 if (transfersize % 128) 673 return 0; 674 675 /* Limit PDMA send to 512 B to avoid random corruption on DTC3181E */ 676 if (hostdata->board == BOARD_DTC3181E && 677 cmd->sc_data_direction == DMA_TO_DEVICE) 678 transfersize = min(cmd->SCp.this_residual, 512); 679 680 return min(transfersize, DMA_MAX_SIZE); 681 } 682 683 static int generic_NCR5380_dma_residual(struct NCR5380_hostdata *hostdata) 684 { 685 return hostdata->pdma_residual; 686 } 687 688 /* Include the core driver code. */ 689 690 #include "NCR5380.c" 691 692 static struct scsi_host_template driver_template = { 693 .module = THIS_MODULE, 694 .proc_name = DRV_MODULE_NAME, 695 .name = "Generic NCR5380/NCR53C400 SCSI", 696 .info = generic_NCR5380_info, 697 .queuecommand = generic_NCR5380_queue_command, 698 .eh_abort_handler = generic_NCR5380_abort, 699 .eh_host_reset_handler = generic_NCR5380_host_reset, 700 .can_queue = 16, 701 .this_id = 7, 702 .sg_tablesize = SG_ALL, 703 .cmd_per_lun = 2, 704 .dma_boundary = PAGE_SIZE - 1, 705 .cmd_size = NCR5380_CMD_SIZE, 706 .max_sectors = 128, 707 }; 708 709 static int generic_NCR5380_isa_match(struct device *pdev, unsigned int ndev) 710 { 711 int ret = generic_NCR5380_init_one(&driver_template, pdev, base[ndev], 712 irq[ndev], card[ndev]); 713 if (ret) { 714 if (base[ndev]) 715 printk(KERN_WARNING "Card not found at address 0x%03x\n", 716 base[ndev]); 717 return 0; 718 } 719 720 return 1; 721 } 722 723 static int generic_NCR5380_isa_remove(struct device *pdev, 724 unsigned int ndev) 725 { 726 generic_NCR5380_release_resources(dev_get_drvdata(pdev)); 727 dev_set_drvdata(pdev, NULL); 728 return 0; 729 } 730 731 static struct isa_driver generic_NCR5380_isa_driver = { 732 .match = generic_NCR5380_isa_match, 733 .remove = generic_NCR5380_isa_remove, 734 .driver = { 735 .name = DRV_MODULE_NAME 736 }, 737 }; 738 739 #ifdef CONFIG_PNP 740 static const struct pnp_device_id generic_NCR5380_pnp_ids[] = { 741 { .id = "DTC436e", .driver_data = BOARD_DTC3181E }, 742 { .id = "" } 743 }; 744 MODULE_DEVICE_TABLE(pnp, generic_NCR5380_pnp_ids); 745 746 static int generic_NCR5380_pnp_probe(struct pnp_dev *pdev, 747 const struct pnp_device_id *id) 748 { 749 int base, irq; 750 751 if (pnp_activate_dev(pdev) < 0) 752 return -EBUSY; 753 754 base = pnp_port_start(pdev, 0); 755 irq = pnp_irq(pdev, 0); 756 757 return generic_NCR5380_init_one(&driver_template, &pdev->dev, base, irq, 758 id->driver_data); 759 } 760 761 static void generic_NCR5380_pnp_remove(struct pnp_dev *pdev) 762 { 763 generic_NCR5380_release_resources(pnp_get_drvdata(pdev)); 764 pnp_set_drvdata(pdev, NULL); 765 } 766 767 static struct pnp_driver generic_NCR5380_pnp_driver = { 768 .name = DRV_MODULE_NAME, 769 .id_table = generic_NCR5380_pnp_ids, 770 .probe = generic_NCR5380_pnp_probe, 771 .remove = generic_NCR5380_pnp_remove, 772 }; 773 #endif /* defined(CONFIG_PNP) */ 774 775 static int pnp_registered, isa_registered; 776 777 static int __init generic_NCR5380_init(void) 778 { 779 int ret = 0; 780 781 /* compatibility with old-style parameters */ 782 if (irq[0] == -1 && base[0] == 0 && card[0] == -1) { 783 irq[0] = ncr_irq; 784 base[0] = ncr_addr; 785 if (ncr_5380) 786 card[0] = BOARD_NCR5380; 787 if (ncr_53c400) 788 card[0] = BOARD_NCR53C400; 789 if (ncr_53c400a) 790 card[0] = BOARD_NCR53C400A; 791 if (dtc_3181e) 792 card[0] = BOARD_DTC3181E; 793 if (hp_c2502) 794 card[0] = BOARD_HP_C2502; 795 } 796 797 #ifdef CONFIG_PNP 798 if (!pnp_register_driver(&generic_NCR5380_pnp_driver)) 799 pnp_registered = 1; 800 #endif 801 ret = isa_register_driver(&generic_NCR5380_isa_driver, MAX_CARDS); 802 if (!ret) 803 isa_registered = 1; 804 805 return (pnp_registered || isa_registered) ? 0 : ret; 806 } 807 808 static void __exit generic_NCR5380_exit(void) 809 { 810 #ifdef CONFIG_PNP 811 if (pnp_registered) 812 pnp_unregister_driver(&generic_NCR5380_pnp_driver); 813 #endif 814 if (isa_registered) 815 isa_unregister_driver(&generic_NCR5380_isa_driver); 816 } 817 818 module_init(generic_NCR5380_init); 819 module_exit(generic_NCR5380_exit); 820