1/************************************************************ 2 * * 3 * Linux EATA SCSI PIO driver * 4 * * 5 * based on the CAM document CAM/89-004 rev. 2.0c, * 6 * DPT's driver kit, some internal documents and source, * 7 * and several other Linux scsi drivers and kernel docs. * 8 * * 9 * The driver currently: * 10 * -supports all EATA-PIO boards * 11 * -only supports DASD devices * 12 * * 13 * (c)1993-96 Michael Neuffer, Alfred Arnold * 14 * neuffer@goofy.zdv.uni-mainz.de * 15 * a.arnold@kfa-juelich.de * 16 * * 17 * Updated 2002 by Alan Cox <alan@redhat.com> for Linux * 18 * 2.5.x and the newer locking and error handling * 19 * * 20 * This program is free software; you can redistribute it * 21 * and/or modify it under the terms of the GNU General * 22 * Public License as published by the Free Software * 23 * Foundation; either version 2 of the License, or * 24 * (at your option) any later version. * 25 * * 26 * This program is distributed in the hope that it will be * 27 * useful, but WITHOUT ANY WARRANTY; without even the * 28 * implied warranty of MERCHANTABILITY or FITNESS FOR A * 29 * PARTICULAR PURPOSE. See the GNU General Public License * 30 * for more details. * 31 * * 32 * You should have received a copy of the GNU General * 33 * Public License along with this kernel; if not, write to * 34 * the Free Software Foundation, Inc., 675 Mass Ave, * 35 * Cambridge, MA 02139, USA. * 36 * * 37 * For the avoidance of doubt the "preferred form" of this * 38 * code is one which is in an open non patent encumbered * 39 * format. Where cryptographic key signing forms part of * 40 * the process of creating an executable the information * 41 * including keys needed to generate an equivalently * 42 * functional executable are deemed to be part of the * 43 * source code are deemed to be part of the source code. * 44 * * 45 ************************************************************ 46 * last change: 2002/11/02 OS: Linux 2.5.45 * 47 ************************************************************/ 48 49#include <linux/module.h> 50#include <linux/kernel.h> 51#include <linux/string.h> 52#include <linux/ioport.h> 53#include <linux/slab.h> 54#include <linux/in.h> 55#include <linux/pci.h> 56#include <linux/proc_fs.h> 57#include <linux/interrupt.h> 58#include <linux/blkdev.h> 59#include <linux/spinlock.h> 60#include <linux/delay.h> 61 62#include <asm/io.h> 63 64#include <scsi/scsi.h> 65#include <scsi/scsi_cmnd.h> 66#include <scsi/scsi_device.h> 67#include <scsi/scsi_host.h> 68 69#include "eata_generic.h" 70#include "eata_pio.h" 71 72 73static unsigned int ISAbases[MAXISA] = { 74 0x1F0, 0x170, 0x330, 0x230 75}; 76 77static unsigned int ISAirqs[MAXISA] = { 78 14, 12, 15, 11 79}; 80 81static unsigned char EISAbases[] = { 82 1, 1, 1, 1, 1, 1, 1, 1, 83 1, 1, 1, 1, 1, 1, 1, 1 84}; 85 86static unsigned int registered_HBAs; 87static struct Scsi_Host *last_HBA; 88static struct Scsi_Host *first_HBA; 89static unsigned char reg_IRQ[16]; 90static unsigned char reg_IRQL[16]; 91static unsigned long int_counter; 92static unsigned long queue_counter; 93 94static struct scsi_host_template driver_template; 95 96/* 97 * eata_proc_info 98 * inout : decides on the direction of the dataflow and the meaning of the 99 * variables 100 * buffer: If inout==FALSE data is being written to it else read from it 101 * *start: If inout==FALSE start of the valid data in the buffer 102 * offset: If inout==FALSE offset from the beginning of the imaginary file 103 * from which we start writing into the buffer 104 * length: If inout==FALSE max number of bytes to be written into the buffer 105 * else number of bytes in the buffer 106 */ 107static int eata_pio_proc_info(struct Scsi_Host *shost, char *buffer, char **start, off_t offset, 108 int length, int rw) 109{ 110 static u8 buff[512]; 111 int size, len = 0; 112 off_t begin = 0, pos = 0; 113 114 if (rw) 115 return -ENOSYS; 116 if (offset == 0) 117 memset(buff, 0, sizeof(buff)); 118 119 size = sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: " 120 "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB); 121 len += size; pos = begin + len; 122 size = sprintf(buffer + len, "queued commands: %10ld\n" 123 "processed interrupts:%10ld\n", queue_counter, int_counter); 124 len += size; pos = begin + len; 125 126 size = sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n", 127 shost->host_no, SD(shost)->name); 128 len += size; 129 pos = begin + len; 130 size = sprintf(buffer + len, "Firmware revision: v%s\n", 131 SD(shost)->revision); 132 len += size; 133 pos = begin + len; 134 size = sprintf(buffer + len, "IO: PIO\n"); 135 len += size; 136 pos = begin + len; 137 size = sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base); 138 len += size; 139 pos = begin + len; 140 size = sprintf(buffer + len, "Host Bus: %s\n", 141 (SD(shost)->bustype == 'P')?"PCI ": 142 (SD(shost)->bustype == 'E')?"EISA":"ISA "); 143 144 len += size; 145 pos = begin + len; 146 147 if (pos < offset) { 148 len = 0; 149 begin = pos; 150 } 151 if (pos > offset + length) 152 goto stop_output; 153 154 stop_output: 155 DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len)); 156 *start=buffer+(offset-begin); /* Start of wanted data */ 157 len-=(offset-begin); /* Start slop */ 158 if(len>length) 159 len = length; /* Ending slop */ 160 DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len)); 161 162 return (len); 163} 164 165static int eata_pio_release(struct Scsi_Host *sh) 166{ 167 hostdata *hd = SD(sh); 168 if (sh->irq && reg_IRQ[sh->irq] == 1) 169 free_irq(sh->irq, NULL); 170 else 171 reg_IRQ[sh->irq]--; 172 if (SD(sh)->channel == 0) { 173 if (sh->io_port && sh->n_io_port) 174 release_region(sh->io_port, sh->n_io_port); 175 } 176 /* At this point the PCI reference can go */ 177 if (hd->pdev) 178 pci_dev_put(hd->pdev); 179 return 1; 180} 181 182static void IncStat(struct scsi_pointer *SCp, unsigned int Increment) 183{ 184 SCp->ptr += Increment; 185 if ((SCp->this_residual -= Increment) == 0) { 186 if ((--SCp->buffers_residual) == 0) 187 SCp->Status = 0; 188 else { 189 SCp->buffer++; 190 SCp->ptr = page_address(SCp->buffer->page) + SCp->buffer->offset; 191 SCp->this_residual = SCp->buffer->length; 192 } 193 } 194} 195 196static irqreturn_t eata_pio_int_handler(int irq, void *dev_id); 197 198static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id) 199{ 200 unsigned long flags; 201 struct Scsi_Host *dev = dev_id; 202 irqreturn_t ret; 203 204 spin_lock_irqsave(dev->host_lock, flags); 205 ret = eata_pio_int_handler(irq, dev_id); 206 spin_unlock_irqrestore(dev->host_lock, flags); 207 return ret; 208} 209 210static irqreturn_t eata_pio_int_handler(int irq, void *dev_id) 211{ 212 unsigned int eata_stat = 0xfffff; 213 struct scsi_cmnd *cmd; 214 hostdata *hd; 215 struct eata_ccb *cp; 216 unsigned long base; 217 unsigned int x, z; 218 struct Scsi_Host *sh; 219 unsigned short zwickel = 0; 220 unsigned char stat, odd; 221 irqreturn_t ret = IRQ_NONE; 222 223 for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev) 224 { 225 if (sh->irq != irq) 226 continue; 227 if (inb(sh->base + HA_RSTATUS) & HA_SBUSY) 228 continue; 229 230 int_counter++; 231 ret = IRQ_HANDLED; 232 233 hd = SD(sh); 234 235 cp = &hd->ccb[0]; 236 cmd = cp->cmd; 237 base = cmd->device->host->base; 238 239 do { 240 stat = inb(base + HA_RSTATUS); 241 if (stat & HA_SDRQ) { 242 if (cp->DataIn) { 243 z = 256; 244 odd = 0; 245 while ((cmd->SCp.Status) && ((z > 0) || (odd))) { 246 if (odd) { 247 *(cmd->SCp.ptr) = zwickel >> 8; 248 IncStat(&cmd->SCp, 1); 249 odd = 0; 250 } 251 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2); 252 insw(base + HA_RDATA, cmd->SCp.ptr, x); 253 z -= x; 254 IncStat(&cmd->SCp, 2 * x); 255 if ((z > 0) && (cmd->SCp.this_residual == 1)) { 256 zwickel = inw(base + HA_RDATA); 257 *(cmd->SCp.ptr) = zwickel & 0xff; 258 IncStat(&cmd->SCp, 1); 259 z--; 260 odd = 1; 261 } 262 } 263 while (z > 0) { 264 zwickel = inw(base + HA_RDATA); 265 z--; 266 } 267 } else { /* cp->DataOut */ 268 269 odd = 0; 270 z = 256; 271 while ((cmd->SCp.Status) && ((z > 0) || (odd))) { 272 if (odd) { 273 zwickel += *(cmd->SCp.ptr) << 8; 274 IncStat(&cmd->SCp, 1); 275 outw(zwickel, base + HA_RDATA); 276 z--; 277 odd = 0; 278 } 279 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2); 280 outsw(base + HA_RDATA, cmd->SCp.ptr, x); 281 z -= x; 282 IncStat(&cmd->SCp, 2 * x); 283 if ((z > 0) && (cmd->SCp.this_residual == 1)) { 284 zwickel = *(cmd->SCp.ptr); 285 zwickel &= 0xff; 286 IncStat(&cmd->SCp, 1); 287 odd = 1; 288 } 289 } 290 while (z > 0 || odd) { 291 outw(zwickel, base + HA_RDATA); 292 z--; 293 odd = 0; 294 } 295 } 296 } 297 } 298 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport)); 299 300 /* terminate handler if HBA goes busy again, i.e. transfers 301 * more data */ 302 303 if (stat & HA_SBUSY) 304 break; 305 306 /* OK, this is quite stupid, but I haven't found any correct 307 * way to get HBA&SCSI status so far */ 308 309 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) { 310 cmd->result = (DID_OK << 16); 311 hd->devflags |= (1 << cp->cp_id); 312 } else if (hd->devflags & (1 << cp->cp_id)) 313 cmd->result = (DID_OK << 16) + 0x02; 314 else 315 cmd->result = (DID_NO_CONNECT << 16); 316 317 if (cp->status == LOCKED) { 318 cp->status = FREE; 319 eata_stat = inb(base + HA_RSTATUS); 320 printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n"); 321 return ret; 322 } 323#if DBG_INTR2 324 if (stat != 0x50) 325 printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result); 326#endif 327 328 cp->status = FREE; /* now we can release the slot */ 329 330 cmd->scsi_done(cmd); 331 } 332 333 return ret; 334} 335 336static inline unsigned int eata_pio_send_command(unsigned long base, unsigned char command) 337{ 338 unsigned int loop = 50; 339 340 while (inb(base + HA_RSTATUS) & HA_SBUSY) 341 if (--loop == 0) 342 return 1; 343 344 /* Enable interrupts for HBA. It is not the best way to do it at this 345 * place, but I hope that it doesn't interfere with the IDE driver 346 * initialization this way */ 347 348 outb(HA_CTRL_8HEADS, base + HA_CTRLREG); 349 350 outb(command, base + HA_WCOMMAND); 351 return 0; 352} 353 354static int eata_pio_queue(struct scsi_cmnd *cmd, 355 void (*done)(struct scsi_cmnd *)) 356{ 357 unsigned int x, y; 358 unsigned long base; 359 360 hostdata *hd; 361 struct Scsi_Host *sh; 362 struct eata_ccb *cp; 363 364 queue_counter++; 365 366 hd = HD(cmd); 367 sh = cmd->device->host; 368 base = sh->base; 369 370 /* use only slot 0, as 2001 can handle only one cmd at a time */ 371 372 y = x = 0; 373 374 if (hd->ccb[y].status != FREE) { 375 376 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y)); 377#if DEBUG_EATA 378 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter); 379#else 380 panic(KERN_EMERG "eata_pio: run out of queue slots....\n"); 381#endif 382 } 383 384 cp = &hd->ccb[y]; 385 386 memset(cp, 0, sizeof(struct eata_ccb)); 387 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); 388 389 cp->status = USED; /* claim free slot */ 390 391 DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd, 392 "eata_pio_queue pid %ld, y %d\n", 393 cmd->pid, y)); 394 395 cmd->scsi_done = (void *) done; 396 397 if (cmd->sc_data_direction == DMA_TO_DEVICE) 398 cp->DataOut = 1; /* Output mode */ 399 else 400 cp->DataIn = 0; /* Input mode */ 401 402 cp->Interpret = (cmd->device->id == hd->hostid); 403 cp->cp_datalen = cpu_to_be32(cmd->request_bufflen); 404 cp->Auto_Req_Sen = 0; 405 cp->cp_reqDMA = 0; 406 cp->reqlen = 0; 407 408 cp->cp_id = cmd->device->id; 409 cp->cp_lun = cmd->device->lun; 410 cp->cp_dispri = 0; 411 cp->cp_identify = 1; 412 memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd)); 413 414 cp->cp_statDMA = 0; 415 416 cp->cp_viraddr = cp; 417 cp->cmd = cmd; 418 cmd->host_scribble = (char *) &hd->ccb[y]; 419 420 if (cmd->use_sg == 0) { 421 cmd->SCp.buffers_residual = 1; 422 cmd->SCp.ptr = cmd->request_buffer; 423 cmd->SCp.this_residual = cmd->request_bufflen; 424 cmd->SCp.buffer = NULL; 425 } else { 426 cmd->SCp.buffer = cmd->request_buffer; 427 cmd->SCp.buffers_residual = cmd->use_sg; 428 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset; 429 cmd->SCp.this_residual = cmd->SCp.buffer->length; 430 } 431 cmd->SCp.Status = (cmd->SCp.this_residual != 0); /* TRUE as long as bytes 432 * are to transfer */ 433 434 if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) { 435 cmd->result = DID_BUS_BUSY << 16; 436 scmd_printk(KERN_NOTICE, cmd, 437 "eata_pio_queue pid %ld, HBA busy, " 438 "returning DID_BUS_BUSY, done.\n", cmd->pid); 439 done(cmd); 440 cp->status = FREE; 441 return (0); 442 } 443 while (!(inb(base + HA_RSTATUS) & HA_SDRQ)) 444 cpu_relax(); 445 outsw(base + HA_RDATA, cp, hd->cplen); 446 outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND); 447 for (x = 0; x < hd->cppadlen; x++) 448 outw(0, base + HA_RDATA); 449 450 DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd, 451 "Queued base %#.4lx pid: %ld " 452 "slot %d irq %d\n", sh->base, cmd->pid, y, sh->irq)); 453 454 return (0); 455} 456 457static int eata_pio_abort(struct scsi_cmnd *cmd) 458{ 459 unsigned int loop = 100; 460 461 DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd, 462 "eata_pio_abort called pid: %ld\n", 463 cmd->pid)); 464 465 while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY) 466 if (--loop == 0) { 467 printk(KERN_WARNING "eata_pio: abort, timeout error.\n"); 468 return FAILED; 469 } 470 if (CD(cmd)->status == FREE) { 471 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n")); 472 return FAILED; 473 } 474 if (CD(cmd)->status == USED) { 475 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n")); 476 /* We want to sleep a bit more here */ 477 return FAILED; /* SNOOZE */ 478 } 479 if (CD(cmd)->status == RESET) { 480 printk(KERN_WARNING "eata_pio: abort, command reset error.\n"); 481 return FAILED; 482 } 483 if (CD(cmd)->status == LOCKED) { 484 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n")); 485 return FAILED; 486 } 487 panic("eata_pio: abort: invalid slot status\n"); 488} 489 490static int eata_pio_host_reset(struct scsi_cmnd *cmd) 491{ 492 unsigned int x, limit = 0; 493 unsigned char success = 0; 494 struct scsi_cmnd *sp; 495 struct Scsi_Host *host = cmd->device->host; 496 497 DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd, 498 "eata_pio_reset called pid:%ld\n", 499 cmd->pid)); 500 501 spin_lock_irq(host->host_lock); 502 503 if (HD(cmd)->state == RESET) { 504 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n"); 505 spin_unlock_irq(host->host_lock); 506 return FAILED; 507 } 508 509 /* force all slots to be free */ 510 511 for (x = 0; x < cmd->device->host->can_queue; x++) { 512 513 if (HD(cmd)->ccb[x].status == FREE) 514 continue; 515 516 sp = HD(cmd)->ccb[x].cmd; 517 HD(cmd)->ccb[x].status = RESET; 518 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid); 519 520 if (sp == NULL) 521 panic("eata_pio_reset: slot %d, sp==NULL.\n", x); 522 } 523 524 /* hard reset the HBA */ 525 outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND); 526 527 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n")); 528 HD(cmd)->state = RESET; 529 530 spin_unlock_irq(host->host_lock); 531 msleep(3000); 532 spin_lock_irq(host->host_lock); 533 534 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit)); 535 536 for (x = 0; x < cmd->device->host->can_queue; x++) { 537 538 /* Skip slots already set free by interrupt */ 539 if (HD(cmd)->ccb[x].status != RESET) 540 continue; 541 542 sp = HD(cmd)->ccb[x].cmd; 543 sp->result = DID_RESET << 16; 544 545 /* This mailbox is terminated */ 546 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x); 547 HD(cmd)->ccb[x].status = FREE; 548 549 sp->scsi_done(sp); 550 } 551 552 HD(cmd)->state = 0; 553 554 spin_unlock_irq(host->host_lock); 555 556 if (success) { /* hmmm... */ 557 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n")); 558 return SUCCESS; 559 } else { 560 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n")); 561 return FAILED; 562 } 563} 564 565static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen) 566{ 567 struct eata_ccb cp; 568 static char buff[256]; 569 int z; 570 571 memset(&cp, 0, sizeof(struct eata_ccb)); 572 memset(buff, 0, sizeof(buff)); 573 574 cp.DataIn = 1; 575 cp.Interpret = 1; /* Interpret command */ 576 577 cp.cp_datalen = cpu_to_be32(254); 578 cp.cp_dataDMA = cpu_to_be32(0); 579 580 cp.cp_id = id; 581 cp.cp_lun = 0; 582 583 cp.cp_cdb[0] = INQUIRY; 584 cp.cp_cdb[1] = 0; 585 cp.cp_cdb[2] = 0; 586 cp.cp_cdb[3] = 0; 587 cp.cp_cdb[4] = 254; 588 cp.cp_cdb[5] = 0; 589 590 if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) 591 return (NULL); 592 while (!(inb(base + HA_RSTATUS) & HA_SDRQ)); 593 outsw(base + HA_RDATA, &cp, cplen); 594 outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND); 595 for (z = 0; z < cppadlen; z++) 596 outw(0, base + HA_RDATA); 597 598 while (inb(base + HA_RSTATUS) & HA_SBUSY); 599 if (inb(base + HA_RSTATUS) & HA_SERROR) 600 return (NULL); 601 else if (!(inb(base + HA_RSTATUS) & HA_SDRQ)) 602 return (NULL); 603 else { 604 insw(base + HA_RDATA, &buff, 127); 605 while (inb(base + HA_RSTATUS) & HA_SDRQ) 606 inw(base + HA_RDATA); 607 return (buff); 608 } 609} 610 611static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf) 612{ 613 unsigned long loop = HZ / 2; 614 int z; 615 unsigned short *p; 616 617 if (!request_region(base, 9, "eata_pio")) 618 return 0; 619 620 memset(buf, 0, sizeof(struct get_conf)); 621 622 while (inb(base + HA_RSTATUS) & HA_SBUSY) 623 if (--loop == 0) 624 goto fail; 625 626 DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base)); 627 eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG); 628 629 loop = 50; 630 for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) { 631 while (!(inb(base + HA_RSTATUS) & HA_SDRQ)) 632 if (--loop == 0) 633 goto fail; 634 635 loop = 50; 636 *p = inw(base + HA_RDATA); 637 } 638 if (inb(base + HA_RSTATUS) & HA_SERROR) { 639 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during " 640 "transfer for HBA at %lx\n", base)); 641 goto fail; 642 } 643 644 if (cpu_to_be32(EATA_SIGNATURE) != buf->signature) 645 goto fail; 646 647 DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found " 648 "at %#4lx EATA Level: %x\n", 649 base, (unsigned int) (buf->version))); 650 651 while (inb(base + HA_RSTATUS) & HA_SDRQ) 652 inw(base + HA_RDATA); 653 654 if (!ALLOW_DMA_BOARDS) { 655 for (z = 0; z < MAXISA; z++) 656 if (base == ISAbases[z]) { 657 buf->IRQ = ISAirqs[z]; 658 break; 659 } 660 } 661 662 return 1; 663 664 fail: 665 release_region(base, 9); 666 return 0; 667} 668 669static void print_pio_config(struct get_conf *gc) 670{ 671 printk("Please check values: (read config data)\n"); 672 printk("LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d\n", be32_to_cpu(gc->len), gc->version, gc->OCS_enabled, gc->TAR_support, gc->TRNXFR, gc->MORE_support); 673 printk("HAAV:%d SCSIID0:%d ID1:%d ID2:%d QUEUE:%d SG:%d SEC:%d\n", gc->HAA_valid, gc->scsi_id[3], gc->scsi_id[2], gc->scsi_id[1], be16_to_cpu(gc->queuesiz), be16_to_cpu(gc->SGsiz), gc->SECOND); 674 printk("IRQ:%d IRQT:%d FORCADR:%d MCH:%d RIDQ:%d\n", gc->IRQ, gc->IRQ_TR, gc->FORCADR, gc->MAX_CHAN, gc->ID_qest); 675} 676 677static unsigned int print_selftest(unsigned int base) 678{ 679 unsigned char buffer[512]; 680#ifdef VERBOSE_SETUP 681 int z; 682#endif 683 684 printk("eata_pio: executing controller self test & setup...\n"); 685 while (inb(base + HA_RSTATUS) & HA_SBUSY); 686 outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND); 687 do { 688 while (inb(base + HA_RSTATUS) & HA_SBUSY) 689 /* nothing */ ; 690 if (inb(base + HA_RSTATUS) & HA_SDRQ) { 691 insw(base + HA_RDATA, &buffer, 256); 692#ifdef VERBOSE_SETUP 693 /* no beeps please... */ 694 for (z = 0; z < 511 && buffer[z]; z++) 695 if (buffer[z] != 7) 696 printk("%c", buffer[z]); 697#endif 698 } 699 } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ)); 700 701 return (!(inb(base + HA_RSTATUS) & HA_SERROR)); 702} 703 704static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev) 705{ 706 unsigned long size = 0; 707 char *buff; 708 unsigned long cplen; 709 unsigned short cppadlen; 710 struct Scsi_Host *sh; 711 hostdata *hd; 712 713 DBG(DBG_REGISTER, print_pio_config(gc)); 714 715 if (gc->DMA_support) { 716 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base); 717 if (!ALLOW_DMA_BOARDS) 718 return 0; 719 } 720 721 if ((buff = get_pio_board_data(base, gc->IRQ, gc->scsi_id[3], cplen = (cpu_to_be32(gc->cplen) + 1) / 2, cppadlen = (cpu_to_be16(gc->cppadlen) + 1) / 2)) == NULL) { 722 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base); 723 return 0; 724 } 725 726 if (!print_selftest(base) && !ALLOW_DMA_BOARDS) { 727 printk("HBA at %#lx failed while performing self test & setup.\n", base); 728 return 0; 729 } 730 731 size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)); 732 733 sh = scsi_register(&driver_template, size); 734 if (sh == NULL) 735 return 0; 736 737 if (!reg_IRQ[gc->IRQ]) { /* Interrupt already registered ? */ 738 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", sh)) { 739 reg_IRQ[gc->IRQ]++; 740 if (!gc->IRQ_TR) 741 reg_IRQL[gc->IRQ] = 1; /* IRQ is edge triggered */ 742 } else { 743 printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ); 744 return 0; 745 } 746 } else { /* More than one HBA on this IRQ */ 747 if (reg_IRQL[gc->IRQ]) { 748 printk("Can't support more than one HBA on this IRQ,\n" " if the IRQ is edge triggered. Sorry.\n"); 749 return 0; 750 } else 751 reg_IRQ[gc->IRQ]++; 752 } 753 754 hd = SD(sh); 755 756 memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz))); 757 memset(hd->reads, 0, sizeof(hd->reads)); 758 759 strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor)); 760 strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name)); 761 SD(sh)->revision[0] = buff[32]; 762 SD(sh)->revision[1] = buff[33]; 763 SD(sh)->revision[2] = buff[34]; 764 SD(sh)->revision[3] = '.'; 765 SD(sh)->revision[4] = buff[35]; 766 SD(sh)->revision[5] = 0; 767 768 switch (be32_to_cpu(gc->len)) { 769 case 0x1c: 770 SD(sh)->EATA_revision = 'a'; 771 break; 772 case 0x1e: 773 SD(sh)->EATA_revision = 'b'; 774 break; 775 case 0x22: 776 SD(sh)->EATA_revision = 'c'; 777 break; 778 case 0x24: 779 SD(sh)->EATA_revision = 'z'; 780 default: 781 SD(sh)->EATA_revision = '?'; 782 } 783 784 if (be32_to_cpu(gc->len) >= 0x22) { 785 if (gc->is_PCI) 786 hd->bustype = IS_PCI; 787 else if (gc->is_EISA) 788 hd->bustype = IS_EISA; 789 else 790 hd->bustype = IS_ISA; 791 } else { 792 if (buff[21] == '4') 793 hd->bustype = IS_PCI; 794 else if (buff[21] == '2') 795 hd->bustype = IS_EISA; 796 else 797 hd->bustype = IS_ISA; 798 } 799 800 SD(sh)->cplen = cplen; 801 SD(sh)->cppadlen = cppadlen; 802 SD(sh)->hostid = gc->scsi_id[3]; 803 SD(sh)->devflags = 1 << gc->scsi_id[3]; 804 SD(sh)->moresupport = gc->MORE_support; 805 sh->unique_id = base; 806 sh->base = base; 807 sh->io_port = base; 808 sh->n_io_port = 9; 809 sh->irq = gc->IRQ; 810 sh->dma_channel = PIO; 811 sh->this_id = gc->scsi_id[3]; 812 sh->can_queue = 1; 813 sh->cmd_per_lun = 1; 814 sh->sg_tablesize = SG_ALL; 815 816 hd->channel = 0; 817 818 hd->pdev = pci_dev_get(pdev); /* Keep a PCI reference */ 819 820 sh->max_id = 8; 821 sh->max_lun = 8; 822 823 if (gc->SECOND) 824 hd->primary = 0; 825 else 826 hd->primary = 1; 827 828 sh->unchecked_isa_dma = 0; /* We can only do PIO */ 829 830 hd->next = NULL; /* build a linked list of all HBAs */ 831 hd->prev = last_HBA; 832 if (hd->prev != NULL) 833 SD(hd->prev)->next = sh; 834 last_HBA = sh; 835 if (first_HBA == NULL) 836 first_HBA = sh; 837 registered_HBAs++; 838 return (1); 839} 840 841static void find_pio_ISA(struct get_conf *buf) 842{ 843 int i; 844 845 for (i = 0; i < MAXISA; i++) { 846 if (!ISAbases[i]) 847 continue; 848 if (!get_pio_conf_PIO(ISAbases[i], buf)) 849 continue; 850 if (!register_pio_HBA(ISAbases[i], buf, NULL)) 851 release_region(ISAbases[i], 9); 852 else 853 ISAbases[i] = 0; 854 } 855 return; 856} 857 858static void find_pio_EISA(struct get_conf *buf) 859{ 860 u32 base; 861 int i; 862 863#ifdef CHECKPAL 864 u8 pal1, pal2, pal3; 865#endif 866 867 for (i = 0; i < MAXEISA; i++) { 868 if (EISAbases[i]) { /* Still a possibility ? */ 869 870 base = 0x1c88 + (i * 0x1000); 871#ifdef CHECKPAL 872 pal1 = inb((u16) base - 8); 873 pal2 = inb((u16) base - 7); 874 pal3 = inb((u16) base - 6); 875 876 if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) { 877 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3)); 878#endif 879 if (get_pio_conf_PIO(base, buf)) { 880 DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf)); 881 if (buf->IRQ) { 882 if (!register_pio_HBA(base, buf, NULL)) 883 release_region(base, 9); 884 } else { 885 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n"); 886 release_region(base, 9); 887 } 888 } 889 /* Nothing found here so we take it from the list */ 890 EISAbases[i] = 0; 891#ifdef CHECKPAL 892 } 893#endif 894 } 895 } 896 return; 897} 898 899static void find_pio_PCI(struct get_conf *buf) 900{ 901#ifndef CONFIG_PCI 902 printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n"); 903#else 904 struct pci_dev *dev = NULL; 905 unsigned long base, x; 906 907 while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) { 908 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev))); 909 if (pci_enable_device(dev)) 910 continue; 911 pci_set_master(dev); 912 base = pci_resource_flags(dev, 0); 913 if (base & IORESOURCE_MEM) { 914 printk("eata_pio: invalid base address of device %s\n", pci_name(dev)); 915 continue; 916 } 917 base = pci_resource_start(dev, 0); 918 /* EISA tag there ? */ 919 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14)) 920 continue; /* Jep, it's forced, so move on */ 921 base += 0x10; /* Now, THIS is the real address */ 922 if (base != 0x1f8) { 923 /* We didn't find it in the primary search */ 924 if (get_pio_conf_PIO(base, buf)) { 925 if (buf->FORCADR) { /* If the address is forced */ 926 release_region(base, 9); 927 continue; /* we'll find it later */ 928 } 929 930 /* OK. We made it till here, so we can go now 931 * and register it. We only have to check and 932 * eventually remove it from the EISA and ISA list 933 */ 934 935 if (!register_pio_HBA(base, buf, dev)) { 936 release_region(base, 9); 937 continue; 938 } 939 940 if (base < 0x1000) { 941 for (x = 0; x < MAXISA; ++x) { 942 if (ISAbases[x] == base) { 943 ISAbases[x] = 0; 944 break; 945 } 946 } 947 } else if ((base & 0x0fff) == 0x0c88) { 948 x = (base >> 12) & 0x0f; 949 EISAbases[x] = 0; 950 } 951 } 952#ifdef CHECK_BLINK 953 else if (check_blink_state(base)) { 954 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n"); 955 } 956#endif 957 } 958 } 959#endif /* #ifndef CONFIG_PCI */ 960} 961 962static int eata_pio_detect(struct scsi_host_template *tpnt) 963{ 964 struct Scsi_Host *HBA_ptr; 965 struct get_conf gc; 966 int i; 967 968 find_pio_PCI(&gc); 969 find_pio_EISA(&gc); 970 find_pio_ISA(&gc); 971 972 for (i = 0; i <= MAXIRQ; i++) 973 if (reg_IRQ[i]) 974 request_irq(i, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", NULL); 975 976 HBA_ptr = first_HBA; 977 978 if (registered_HBAs != 0) { 979 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n" 980 "(c) 1993-95 Michael Neuffer, neuffer@goofy.zdv.uni-mainz.de\n" " Alfred Arnold, a.arnold@kfa-juelich.de\n" "This release only supports DASD devices (harddisks)\n", VER_MAJOR, VER_MINOR, VER_SUB); 981 982 printk("Registered HBAs:\n"); 983 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n"); 984 for (i = 1; i <= registered_HBAs; i++) { 985 printk("scsi%-2d: %.10s v%s 2.0%c %s %#.4lx %2d %d %d %c" 986 " %2d %2d %2d\n", 987 HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision, 988 SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ? 989 "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ", 990 HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id, 991 SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue, 992 HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun); 993 HBA_ptr = SD(HBA_ptr)->next; 994 } 995 } 996 return (registered_HBAs); 997} 998 999static struct scsi_host_template driver_template = { 1000 .proc_name = "eata_pio", 1001 .name = "EATA (Extended Attachment) PIO driver", 1002 .proc_info = eata_pio_proc_info, 1003 .detect = eata_pio_detect, 1004 .release = eata_pio_release, 1005 .queuecommand = eata_pio_queue, 1006 .eh_abort_handler = eata_pio_abort, 1007 .eh_host_reset_handler = eata_pio_host_reset, 1008 .use_clustering = ENABLE_CLUSTERING, 1009}; 1010 1011MODULE_AUTHOR("Michael Neuffer, Alfred Arnold"); 1012MODULE_DESCRIPTION("EATA SCSI PIO driver"); 1013MODULE_LICENSE("GPL"); 1014 1015#include "scsi_module.c" 1016