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1.1 ! root 1: /* ppa.c -- low level driver for the IOMEGA PPA3 ! 2: * parallel port SCSI host adapter. ! 3: * ! 4: * (The PPA3 is the embedded controller in the ZIP drive.) ! 5: * ! 6: * (c) 1995,1996 Grant R. Guenther, [email protected], ! 7: * under the terms of the GNU Public License. ! 8: * ! 9: * Current Maintainer: David Campbell (Perth, Western Australia) ! 10: * [email protected] ! 11: * [email protected] ! 12: * ! 13: * My unoffical company acronym list is 21 pages long: ! 14: * FLA: Four letter acronym with built in facility for ! 15: * future expansion to five letters. ! 16: */ ! 17: ! 18: #include <linux/config.h> ! 19: ! 20: /* The following #define is to avoid a clash with hosts.c */ ! 21: #define PPA_CODE 1 ! 22: #ifndef HAVE_PC87332 ! 23: #define HAVE_PC87332 0 ! 24: #endif ! 25: #define PPA_PROBE_SPP 0x0001 ! 26: #define PPA_PROBE_PS2 0x0002 ! 27: #define PPA_PROBE_ECR 0x0010 ! 28: #define PPA_PROBE_EPP17 0x0100 ! 29: #define PPA_PROBE_EPP19 0x0200 ! 30: int port_probe(unsigned short); ! 31: ! 32: #include <linux/blk.h> ! 33: #include "sd.h" ! 34: #include "hosts.h" ! 35: typedef struct { ! 36: int base; /* Actual port address */ ! 37: int mode; /* Transfer mode */ ! 38: int host; /* Host number (for proc) */ ! 39: Scsi_Cmnd *cur_cmd; /* Current queued command */ ! 40: struct tq_struct ppa_tq; /* Polling interupt stuff */ ! 41: unsigned long jstart; /* Jiffies at start */ ! 42: unsigned failed:1; /* Failure flag */ ! 43: } ppa_struct; ! 44: ! 45: #define PPA_EMPTY \ ! 46: {-1, /* base */ \ ! 47: PPA_AUTODETECT, /* mode */ \ ! 48: -1, /* host */ \ ! 49: NULL, /* cur_cmd */ \ ! 50: {0, 0, ppa_interrupt, NULL}, \ ! 51: 0, /* jstart */ \ ! 52: 0 /* failed */ \ ! 53: } ! 54: ! 55: #include "ppa.h" ! 56: #undef CONFIG_PARPORT ! 57: #define NO_HOSTS 4 ! 58: static ppa_struct ppa_hosts[NO_HOSTS] = ! 59: {PPA_EMPTY, PPA_EMPTY, PPA_EMPTY, PPA_EMPTY}; ! 60: ! 61: #define PPA_BASE(x) ppa_hosts[(x)].base ! 62: ! 63: int base[NO_HOSTS] = ! 64: {0x03bc, 0x0378, 0x0278, 0x0000}; ! 65: #define parbus_base base ! 66: #define parbus_no NO_HOSTS ! 67: ! 68: static inline int ppa_pb_claim(int host_no) ! 69: { ! 70: if (ppa_hosts[host_no].cur_cmd) ! 71: ppa_hosts[host_no].cur_cmd->SCp.phase++; ! 72: return 0; ! 73: } ! 74: ! 75: /*************************************************************************** ! 76: * Parallel port probing routines * ! 77: ***************************************************************************/ ! 78: ! 79: #ifndef MODULE ! 80: /* ! 81: * Command line parameters (for built-in driver): ! 82: * ! 83: * Syntax: ppa=base[,mode[,use_sg]] ! 84: * ! 85: * For example: ppa=0x378 or ppa=0x378,0,3 ! 86: * ! 87: */ ! 88: ! 89: void ppa_setup(char *str, int *ints) ! 90: { ! 91: static int x = 0; ! 92: ! 93: if (x == 0) { /* Disable ALL known ports */ ! 94: int i; ! 95: ! 96: for (i = 0; i < NO_HOSTS; i++) ! 97: parbus_base[i] = 0x0000; ! 98: } ! 99: switch (ints[0]) { ! 100: case 3: ! 101: ppa_sg = ints[3]; ! 102: case 2: ! 103: ppa_hosts[x].mode = ints[2]; ! 104: parbus_base[x] = ints[1]; ! 105: break; ! 106: default: ! 107: printk("PPA: I only use between 2 to 3 parameters.\n"); ! 108: break; ! 109: } ! 110: x++; ! 111: } ! 112: #else ! 113: Scsi_Host_Template driver_template = PPA; ! 114: #include "scsi_module.c" ! 115: #endif ! 116: ! 117: /* ! 118: * Start of Chipset kludges ! 119: */ ! 120: ! 121: #if HAVE_PC87332 > 0 ! 122: #warning PC87332 Kludge code included ! 123: static inline int pc87332_port(int host_no) ! 124: { ! 125: /* A routine to detect and kludge pc87332 chipsets into the ! 126: * "optimum" mode for parallel port data transfer. ! 127: * This assumes EPP is better than ECP... ! 128: * (Which it is for disk drives but not printers and scanners) ! 129: */ ! 130: int base = ppa_hosts[host_no].base; ! 131: ! 132: /* This is where an pc87332 can hide */ ! 133: unsigned short index_addr[4] = ! 134: { ! 135: 0x0398, 0x026e, 0x015c, 0x002e ! 136: }; ! 137: ! 138: /* Bits 0&1 of FAR (Function Address Register) which specify where ! 139: * the LPT port will show up at. ! 140: */ ! 141: unsigned short port_ref[4] = ! 142: { ! 143: 0x378, 0x3bc, 0x278, 0xffff ! 144: }; ! 145: ! 146: unsigned char a; ! 147: int loop; ! 148: ! 149: for (loop = 0; loop < 4; loop++) { ! 150: /* Clear the "wax" out of the pc87332, only needed after hard ! 151: * reset. ! 152: */ ! 153: inb(index_addr[loop]); ! 154: inb(index_addr[loop]); ! 155: inb(index_addr[loop]); ! 156: inb(index_addr[loop]); ! 157: ! 158: /* Anyone home ?? */ ! 159: outb(0xff, index_addr[loop]); ! 160: a = inb(index_addr[loop]); ! 161: switch (a) { ! 162: case (0x0f): /* PC87732 */ ! 163: break; ! 164: case (0x1f): /* PC87306 */ ! 165: break; ! 166: case (0x7f): /* PC87??? */ ! 167: break; ! 168: default: ! 169: continue; ! 170: } /* Is this pc87332 on the desired port */ ! 171: outb(0x01, index_addr[loop]); ! 172: a = inb(index_addr[loop] + 1); ! 173: if (port_ref[a & 0x03] != base) ! 174: continue; ! 175: ! 176: /* Found a pc87332 */ ! 177: printk("NatSemi PC87332 (or variant) at 0x%04x\n", base); ! 178: ! 179: /* Try to enable EPP modes ! 180: * with hardware data direction ! 181: */ ! 182: if (base != 0x3bc) { ! 183: /* EPP 1.9 */ ! 184: outb(0x04, index_addr[loop]); ! 185: a = inb(index_addr[loop] + 1); ! 186: printk("Old reg1 = %02x\n", a); ! 187: /* 0x01 for EPP 1.7, 0x03 for EPP 1.9, 0x0c for ECP */ ! 188: a = (a & 0xf0) | 0x03; ! 189: outb(a, index_addr[loop] + 1); ! 190: outb(a, index_addr[loop] + 1); ! 191: ! 192: /* Software data direction selection */ ! 193: outb(0x02, index_addr[loop]); ! 194: a = inb(index_addr[loop] + 1); ! 195: printk("Old reg2 = %02x\n", a); ! 196: /* 0x80 for software, 0x00 for hardware */ ! 197: a = (a & 0x7f) | 0x80; ! 198: outb(a, index_addr[loop] + 1); ! 199: outb(a, index_addr[loop] + 1); ! 200: ppa_hosts[host_no].mode = PPA_EPP_32; ! 201: } else { ! 202: /* There is not enough address space for the 0x3bc port ! 203: * to have EPP registers so we will kludge it into an ! 204: * ECP ! 205: * port to allow bi-directional byte mode... ! 206: */ ! 207: /* ECP */ ! 208: outb(0x04, index_addr[loop]); ! 209: a = inb(index_addr[loop] + 1); ! 210: a = (a & 0xfb) | 0x06; ! 211: outb(a, index_addr[loop] + 1); ! 212: outb(a, index_addr[loop] + 1); ! 213: ppa_hosts[host_no].mode = PPA_PS2; ! 214: } ! 215: ! 216: outb(0x04, index_addr[loop]); ! 217: a = inb(index_addr[loop] + 1); ! 218: return ppa_hosts[host_no].mode; ! 219: } ! 220: return 0; ! 221: } ! 222: #else ! 223: #define pc87332_port(x) ! 224: #endif /* HAVE_PC87332 */ ! 225: ! 226: static inline int generic_port(int host_no) ! 227: { ! 228: /* Generic parallel port detection ! 229: * This will try to discover if the port is ! 230: * EPP, ECP, PS/2 or NIBBLE (In that order, approx....) ! 231: */ ! 232: unsigned int save_ctr, save_ecr, r; ! 233: int ppb = PPA_BASE(host_no); ! 234: ! 235: save_ctr = r_ctr(ppb); ! 236: save_ecr = r_ecr(ppb); ! 237: r = port_probe(ppb); ! 238: w_ecr(ppb, save_ecr); ! 239: w_ctr(ppb, save_ctr); ! 240: ! 241: if (r & PPA_PROBE_SPP) ! 242: ppa_hosts[host_no].mode = PPA_NIBBLE; ! 243: ! 244: if (r & PPA_PROBE_PS2) { ! 245: ppa_hosts[host_no].mode = PPA_PS2; ! 246: if (r & PPA_PROBE_ECR) ! 247: w_ecr(ppb, 0x20); ! 248: } ! 249: if ((r & PPA_PROBE_EPP17) || (r & PPA_PROBE_EPP19)) { ! 250: /* ppa_hosts[host_no].mode = PPA_EPP_32; */ ! 251: if (r & PPA_PROBE_ECR) ! 252: w_ecr(ppb, 0x80); ! 253: } ! 254: return ppa_hosts[host_no].mode; ! 255: } ! 256: ! 257: int ppa_detect(Scsi_Host_Template * host) ! 258: { ! 259: struct Scsi_Host *hreg; ! 260: int ports; ! 261: int i, nhosts; ! 262: unsigned short ppb; ! 263: ! 264: printk("ppa: Version %s\n", PPA_VERSION); ! 265: nhosts = 0; ! 266: ! 267: for (i = 0; i < parbus_no; i++) { ! 268: if (parbus_base[i] == 0x0000) ! 269: continue; ! 270: ppb = ppa_hosts[i].base = parbus_base[i]; ! 271: ! 272: /* sanity checks */ ! 273: if (check_region(parbus_base[i], ! 274: (parbus_base[i] == 0x03bc) ? 3 : 8)) ! 275: continue; ! 276: ! 277: pc87332_port(i); ! 278: if (!generic_port(i)) ! 279: continue; ! 280: ! 281: if (ppa_init(i)) ! 282: continue; ! 283: ! 284: /* now the glue ... */ ! 285: switch (ppa_hosts[i].mode) { ! 286: case PPA_NIBBLE: ! 287: case PPA_PS2: ! 288: ports = 3; ! 289: break; ! 290: case PPA_EPP_8: ! 291: case PPA_EPP_16: ! 292: case PPA_EPP_32: ! 293: ports = 8; ! 294: break; ! 295: default: /* Never gets here */ ! 296: continue; ! 297: } ! 298: request_region(ppa_hosts[i].base, ports, "ppa"); ! 299: host->can_queue = PPA_CAN_QUEUE; ! 300: host->sg_tablesize = ppa_sg; ! 301: hreg = scsi_register(host, 0); ! 302: hreg->io_port = ppa_hosts[i].base; ! 303: hreg->n_io_port = ports; ! 304: hreg->dma_channel = -1; ! 305: hreg->unique_id = i; ! 306: ppa_hosts[i].host = hreg->host_no; ! 307: nhosts++; ! 308: } ! 309: if (nhosts == 0) ! 310: return 0; ! 311: else ! 312: return 1; /* return number of hosts detected */ ! 313: } ! 314: ! 315: /* This is to give the ppa driver a way to modify the timings (and other ! 316: * parameters) by writing to the /proc/scsi/ppa/0 file. ! 317: * Very simple method really... (To simple, no error checking :( ) ! 318: * Reason: Kernel hackers HATE having to unload and reload modules for ! 319: * testing... ! 320: * Also gives a method to use a script to obtain optimum timings (TODO) ! 321: */ ! 322: ! 323: static inline int ppa_strncmp(const char *a, const char *b, int len) ! 324: { ! 325: int loop; ! 326: for (loop = 0; loop < len; loop++) ! 327: if (a[loop] != b[loop]) ! 328: return 1; ! 329: ! 330: return 0; ! 331: } ! 332: static inline int ppa_proc_write(int hostno, char *buffer, int length) ! 333: { ! 334: unsigned long x; ! 335: ! 336: if ((length > 5) && (ppa_strncmp(buffer, "mode=", 5) == 0)) { ! 337: x = simple_strtoul(buffer + 5, NULL, 0); ! 338: ppa_hosts[hostno].mode = x; ! 339: return length; ! 340: } ! 341: printk("ppa /proc: invalid variable\n"); ! 342: return (-EINVAL); ! 343: } ! 344: ! 345: int ppa_proc_info(char *buffer, char **start, off_t offset, ! 346: int length, int hostno, int inout) ! 347: { ! 348: int i; ! 349: int len = 0; ! 350: ! 351: for (i = 0; i < 4; i++) ! 352: if (ppa_hosts[i].host == hostno) ! 353: break; ! 354: ! 355: if (inout) ! 356: return ppa_proc_write(i, buffer, length); ! 357: ! 358: len += sprintf(buffer + len, "Version : %s\n", PPA_VERSION); ! 359: len += sprintf(buffer + len, "Port : 0x%04x\n", ppa_hosts[i].base); ! 360: len += sprintf(buffer + len, "Mode : %s\n", PPA_MODE_STRING[ppa_hosts[i].mode]); ! 361: ! 362: /* Request for beyond end of buffer */ ! 363: if (offset > len) ! 364: return 0; ! 365: ! 366: *start = buffer + offset; ! 367: len -= offset; ! 368: if (len > length) ! 369: len = length; ! 370: return len; ! 371: } /* end of ppa.c */ ! 372: static int device_check(int host_no); ! 373: ! 374: #if PPA_DEBUG > 0 ! 375: #define ppa_fail(x,y) printk("ppa: ppa_fail(%i) from %s at line %d\n",\ ! 376: y, __FUNCTION__, __LINE__); ppa_fail_func(x,y); ! 377: static inline void ppa_fail_func(int host_no, int error_code) ! 378: #else ! 379: static inline void ppa_fail(int host_no, int error_code) ! 380: #endif ! 381: { ! 382: /* If we fail a device then we trash status / message bytes */ ! 383: if (ppa_hosts[host_no].cur_cmd) { ! 384: ppa_hosts[host_no].cur_cmd->result = error_code << 16; ! 385: ppa_hosts[host_no].failed = 1; ! 386: } ! 387: } ! 388: ! 389: /* ! 390: * Wait for the high bit to be set. ! 391: * ! 392: * In principle, this could be tied to an interrupt, but the adapter ! 393: * doesn't appear to be designed to support interrupts. We spin on ! 394: * the 0x80 ready bit. ! 395: */ ! 396: static unsigned char ppa_wait(int host_no) ! 397: { ! 398: int k; ! 399: unsigned short ppb = PPA_BASE(host_no); ! 400: unsigned char r; ! 401: ! 402: k = PPA_SPIN_TMO; ! 403: do { ! 404: r = r_str(ppb); ! 405: k--; ! 406: udelay(1); ! 407: } ! 408: while (!(r & 0x80) && (k)); ! 409: ! 410: /* ! 411: * return some status information. ! 412: * Semantics: 0xc0 = ZIP wants more data ! 413: * 0xd0 = ZIP wants to send more data ! 414: * 0xe0 = ZIP is expecting SCSI command data ! 415: * 0xf0 = end of transfer, ZIP is sending status ! 416: */ ! 417: if (k) ! 418: return (r & 0xf0); ! 419: ! 420: /* Counter expired - Time out occurred */ ! 421: ppa_fail(host_no, DID_TIME_OUT); ! 422: printk("ppa timeout in ppa_wait\n"); ! 423: return 0; /* command timed out */ ! 424: } ! 425: ! 426: /* ! 427: * output a string, in whatever mode is available, according to the ! 428: * PPA protocol. ! 429: */ ! 430: static inline void epp_reset(unsigned short ppb) ! 431: { ! 432: int i; ! 433: ! 434: i = r_str(ppb); ! 435: w_str(ppb, i); ! 436: w_str(ppb, i & 0xfe); ! 437: } ! 438: ! 439: static inline void ecp_sync(unsigned short ppb) ! 440: { ! 441: int i; ! 442: ! 443: if ((r_ecr(ppb) & 0xe0) != 0x80) ! 444: return; ! 445: ! 446: for (i = 0; i < 100; i++) { ! 447: if (r_ecr(ppb) & 0x01) ! 448: return; ! 449: udelay(5); ! 450: } ! 451: printk("ppa: ECP sync failed as data still present in FIFO.\n"); ! 452: } ! 453: ! 454: /* ! 455: * Here is the asm code for the SPP/PS2 protocols for the i386. ! 456: * This has been optimised for speed on 386/486 machines. There will ! 457: * be very little improvement on the current 586+ machines as it is the ! 458: * IO statements which will limit throughput. ! 459: */ ! 460: #ifdef __i386__ ! 461: #define BYTE_OUT(reg) \ ! 462: " movb " #reg ",%%al\n" \ ! 463: " outb %%al,(%%dx)\n" \ ! 464: " addl $2,%%edx\n" \ ! 465: " movb $0x0e,%%al\n" \ ! 466: " outb %%al,(%%dx)\n" \ ! 467: " movb $0x0c,%%al\n" \ ! 468: " outb %%al,(%%dx)\n" \ ! 469: " subl $2,%%edx\n" ! 470: ! 471: static inline int ppa_byte_out(unsigned short base, char *buffer, unsigned int len) ! 472: { ! 473: /* ! 474: * %eax scratch ! 475: * %ebx Data to transfer ! 476: * %ecx Counter (Don't touch!!) ! 477: * %edx Port ! 478: * %esi Source buffer (mem pointer) ! 479: * ! 480: * In case you are wondering what the last line of the asm does... ! 481: * <output allocation> : <input allocation> : <trashed registers> ! 482: */ ! 483: asm("shr $2,%%ecx\n" \ ! 484: " jz .no_more_bulk_bo\n" \ ! 485: " .align 4\n" \ ! 486: ".loop_bulk_bo:\n" \ ! 487: " movl (%%esi),%%ebx\n" \ ! 488: BYTE_OUT(%%bl) \ ! 489: BYTE_OUT(%%bh) \ ! 490: " rorl $16,%%ebx\n" \ ! 491: BYTE_OUT(%%bl) \ ! 492: BYTE_OUT(%%bh) \ ! 493: " addl $4,%%esi\n" \ ! 494: " loop .loop_bulk_bo\n" \ ! 495: " .align 4\n" \ ! 496: ".no_more_bulk_bo:" \ ! 497: : "=S"(buffer): "c"(len), "d"(base), "S"(buffer):"eax", "ebx", "ecx"); ! 498: ! 499: asm("andl $3,%%ecx\n" \ ! 500: " jz .no_more_loose_bo\n" \ ! 501: " .align 4\n" \ ! 502: ".loop_loose_bo:\n" \ ! 503: BYTE_OUT((%%esi)) \ ! 504: " incl %%esi\n" \ ! 505: " loop .loop_loose_bo\n" \ ! 506: ".no_more_loose_bo:\n" \ ! 507: : /* no output */ : "c"(len), "d"(base), "S"(buffer):"eax", "ebx", "ecx"); ! 508: return 1; /* All went well - we hope! */ ! 509: } ! 510: ! 511: #define BYTE_IN(reg) \ ! 512: " inb (%%dx),%%al\n" \ ! 513: " movb %%al," #reg "\n" \ ! 514: " addl $2,%%edx\n" \ ! 515: " movb $0x27,%%al\n" \ ! 516: " outb %%al,(%%dx)\n" \ ! 517: " movb $0x25,%%al\n" \ ! 518: " outb %%al,(%%dx)\n" \ ! 519: " subl $2,%%edx\n" ! 520: ! 521: static inline int ppa_byte_in(unsigned short base, char *buffer, int len) ! 522: { ! 523: /* ! 524: * %eax scratch ! 525: * %ebx Data to transfer ! 526: * %ecx Counter (Don't touch!!) ! 527: * %edx Port ! 528: * %esi Source buffer (mem pointer) ! 529: * ! 530: * In case you are wondering what the last line of the asm does... ! 531: * <output allocation> : <input allocation> : <trashed registers> ! 532: */ ! 533: asm("shr $2,%%ecx\n" \ ! 534: " jz .no_more_bulk_bi\n" \ ! 535: " .align 4\n" \ ! 536: ".loop_bulk_bi:\n" \ ! 537: BYTE_IN(%%bl) \ ! 538: BYTE_IN(%%bh) \ ! 539: " rorl $16,%%ebx\n" \ ! 540: BYTE_IN(%%bl) \ ! 541: BYTE_IN(%%bh) \ ! 542: " rorl $16,%%ebx\n" \ ! 543: " movl %%ebx,(%%esi)\n" \ ! 544: " addl $4,%%esi\n" \ ! 545: " loop .loop_bulk_bi\n" \ ! 546: " .align 4\n" \ ! 547: ".no_more_bulk_bi:" \ ! 548: : "=S"(buffer): "c"(len), "d"(base), "S"(buffer):"eax", "ebx", "ecx"); ! 549: ! 550: asm("andl $3,%%ecx\n" \ ! 551: " jz .no_more_loose_bi\n" \ ! 552: " .align 4\n" \ ! 553: ".loop_loose_bi:\n" \ ! 554: BYTE_IN((%%esi)) \ ! 555: " incl %%esi\n" \ ! 556: " loop .loop_loose_bi\n" \ ! 557: ".no_more_loose_bi:\n" \ ! 558: : /* no output */ : "c"(len), "d"(base), "S"(buffer):"eax", "ebx", "ecx"); ! 559: return 1; /* All went well - we hope! */ ! 560: } ! 561: ! 562: #define NIBBLE_IN(reg) \ ! 563: " incl %%edx\n" \ ! 564: " movb $0x04,%%al\n" \ ! 565: " outb %%al,(%%dx)\n" \ ! 566: " decl %%edx\n" \ ! 567: " inb (%%dx),%%al\n" \ ! 568: " andb $0xf0,%%al\n" \ ! 569: " movb %%al," #reg "\n" \ ! 570: " incl %%edx\n" \ ! 571: " movb $0x06,%%al\n" \ ! 572: " outb %%al,(%%dx)\n" \ ! 573: " decl %%edx\n" \ ! 574: " inb (%%dx),%%al\n" \ ! 575: " shrb $4,%%al\n" \ ! 576: " orb %%al," #reg "\n" ! 577: ! 578: static inline int ppa_nibble_in(unsigned short str_p, char *buffer, int len) ! 579: { ! 580: /* ! 581: * %eax scratch ! 582: * %ebx Data to transfer ! 583: * %ecx Counter (Don't touch!!) ! 584: * %edx Port ! 585: * %esi Source buffer (mem pointer) ! 586: * ! 587: * In case you are wondering what the last line of the asm does... ! 588: * <output allocation> : <input allocation> : <trashed registers> ! 589: */ ! 590: asm("shr $2,%%ecx\n" \ ! 591: " jz .no_more_bulk_ni\n" \ ! 592: " .align 4\n" \ ! 593: ".loop_bulk_ni:\n" \ ! 594: NIBBLE_IN(%%bl) \ ! 595: NIBBLE_IN(%%bh) \ ! 596: " rorl $16,%%ebx\n" \ ! 597: NIBBLE_IN(%%bl) \ ! 598: NIBBLE_IN(%%bh) \ ! 599: " rorl $16,%%ebx\n" \ ! 600: " movl %%ebx,(%%esi)\n" \ ! 601: " addl $4,%%esi\n" \ ! 602: " loop .loop_bulk_ni\n" \ ! 603: " .align 4\n" \ ! 604: ".no_more_bulk_ni:" \ ! 605: : "=S"(buffer): "c"(len), "d"(str_p), "S"(buffer):"eax", "ebx", "ecx"); ! 606: ! 607: asm("andl $3,%%ecx\n" \ ! 608: " jz .no_more_loose_ni\n" \ ! 609: " .align 4\n" \ ! 610: ".loop_loose_ni:\n" \ ! 611: NIBBLE_IN((%%esi)) \ ! 612: " incl %%esi\n" \ ! 613: " loop .loop_loose_ni\n" \ ! 614: ".no_more_loose_ni:\n" \ ! 615: : /* no output */ : "c"(len), "d"(str_p), "S"(buffer):"eax", "ebx", "ecx"); ! 616: return 1; /* All went well - we hope! */ ! 617: } ! 618: #else /* Old style C routines */ ! 619: ! 620: static inline int ppa_byte_out(unsigned short base, const char *buffer, int len) ! 621: { ! 622: unsigned short ctr_p = base + 2; ! 623: int i; ! 624: ! 625: for (i = len; i; i--) { ! 626: outb(*buffer++, base); ! 627: outb(0xe, ctr_p); ! 628: outb(0xc, ctr_p); ! 629: } ! 630: return 1; /* All went well - we hope! */ ! 631: } ! 632: ! 633: static inline int ppa_byte_in(unsigned short base, char *buffer, int len) ! 634: { ! 635: unsigned short ctr_p = base + 2; ! 636: int i; ! 637: ! 638: for (i = len; i; i--) { ! 639: *buffer++ = inb(base); ! 640: outb(0x27, ctr_p); ! 641: outb(0x25, ctr_p); ! 642: } ! 643: return 1; /* All went well - we hope! */ ! 644: } ! 645: ! 646: static inline int ppa_nibble_in(unsigned short str_p, char *buffer, int len) ! 647: { ! 648: unsigned short ctr_p = str_p + 1; ! 649: unsigned char h, l; ! 650: int i; ! 651: ! 652: for (i = len; i; i--) { ! 653: outb(0x4, ctr_p); ! 654: h = inb(str_p); ! 655: outb(0x6, ctr_p); ! 656: l = inb(str_p); ! 657: *buffer++ = (h & 0xf0) | ((l & 0xf0) >> 4); ! 658: } ! 659: return 1; /* All went well - we hope! */ ! 660: } ! 661: #endif ! 662: ! 663: static inline int ppa_epp_out(unsigned short epp_p, unsigned short str_p, const char *buffer, int len) ! 664: { ! 665: int i; ! 666: for (i = len; i; i--) { ! 667: outb(*buffer++, epp_p); ! 668: #ifdef CONFIG_SCSI_PPA_HAVE_PEDANTIC ! 669: if (inb(str_p) & 0x01) ! 670: return 0; ! 671: #endif ! 672: } ! 673: return 1; ! 674: } ! 675: ! 676: static int ppa_out(int host_no, char *buffer, int len) ! 677: { ! 678: int r; ! 679: unsigned short ppb = PPA_BASE(host_no); ! 680: ! 681: r = ppa_wait(host_no); ! 682: ! 683: if ((r & 0x50) != 0x40) { ! 684: ppa_fail(host_no, DID_ERROR); ! 685: return 0; ! 686: } ! 687: switch (ppa_hosts[host_no].mode) { ! 688: case PPA_NIBBLE: ! 689: case PPA_PS2: ! 690: /* 8 bit output, with a loop */ ! 691: r = ppa_byte_out(ppb, buffer, len); ! 692: break; ! 693: ! 694: case PPA_EPP_32: ! 695: case PPA_EPP_16: ! 696: case PPA_EPP_8: ! 697: epp_reset(ppb); ! 698: w_ctr(ppb, 0x4); ! 699: #ifdef CONFIG_SCSI_PPA_HAVE_PEDANTIC ! 700: r = ppa_epp_out(ppb + 4, ppb + 1, buffer, len); ! 701: #else ! 702: if (!(((long) buffer | len) & 0x03)) ! 703: outsl(ppb + 4, buffer, len >> 2); ! 704: else ! 705: outsb(ppb + 4, buffer, len); ! 706: w_ctr(ppb, 0xc); ! 707: r = !(r_str(ppb) & 0x01); ! 708: #endif ! 709: w_ctr(ppb, 0xc); ! 710: ecp_sync(ppb); ! 711: break; ! 712: ! 713: default: ! 714: printk("PPA: bug in ppa_out()\n"); ! 715: r = 0; ! 716: } ! 717: return r; ! 718: } ! 719: ! 720: static inline int ppa_epp_in(int epp_p, int str_p, char *buffer, int len) ! 721: { ! 722: int i; ! 723: for (i = len; i; i--) { ! 724: *buffer++ = inb(epp_p); ! 725: #ifdef CONFIG_SCSI_PPA_HAVE_PEDANTIC ! 726: if (inb(str_p) & 0x01) ! 727: return 0; ! 728: #endif ! 729: } ! 730: return 1; ! 731: } ! 732: ! 733: static int ppa_in(int host_no, char *buffer, int len) ! 734: { ! 735: int r; ! 736: unsigned short ppb = PPA_BASE(host_no); ! 737: ! 738: r = ppa_wait(host_no); ! 739: ! 740: if ((r & 0x50) != 0x50) { ! 741: ppa_fail(host_no, DID_ERROR); ! 742: return 0; ! 743: } ! 744: switch (ppa_hosts[host_no].mode) { ! 745: case PPA_NIBBLE: ! 746: /* 4 bit input, with a loop */ ! 747: r = ppa_nibble_in(ppb + 1, buffer, len); ! 748: w_ctr(ppb, 0xc); ! 749: break; ! 750: ! 751: case PPA_PS2: ! 752: /* 8 bit input, with a loop */ ! 753: w_ctr(ppb, 0x25); ! 754: r = ppa_byte_in(ppb, buffer, len); ! 755: w_ctr(ppb, 0x4); ! 756: w_ctr(ppb, 0xc); ! 757: break; ! 758: ! 759: case PPA_EPP_32: ! 760: case PPA_EPP_16: ! 761: case PPA_EPP_8: ! 762: epp_reset(ppb); ! 763: w_ctr(ppb, 0x24); ! 764: #ifdef CONFIG_SCSI_PPA_HAVE_PEDANTIC ! 765: r = ppa_epp_in(ppb + 4, ppb + 1, buffer, len); ! 766: #else ! 767: if (!(((long) buffer | len) & 0x03)) ! 768: insl(ppb + 4, buffer, len >> 2); ! 769: else ! 770: insb(ppb + 4, buffer, len); ! 771: w_ctr(ppb, 0x2c); ! 772: r = !(r_str(ppb) & 0x01); ! 773: #endif ! 774: w_ctr(ppb, 0x2c); ! 775: ecp_sync(ppb); ! 776: break; ! 777: ! 778: default: ! 779: printk("PPA: bug in ppa_ins()\n"); ! 780: r = 0; ! 781: break; ! 782: } ! 783: return r; ! 784: } ! 785: ! 786: /* end of ppa_io.h */ ! 787: static inline void ppa_d_pulse(unsigned short ppb, unsigned char b) ! 788: { ! 789: w_dtr(ppb, b); ! 790: w_ctr(ppb, 0xc); ! 791: w_ctr(ppb, 0xe); ! 792: w_ctr(ppb, 0xc); ! 793: w_ctr(ppb, 0x4); ! 794: w_ctr(ppb, 0xc); ! 795: } ! 796: ! 797: static void ppa_disconnect(int host_no) ! 798: { ! 799: unsigned short ppb = PPA_BASE(host_no); ! 800: ! 801: ppa_d_pulse(ppb, 0); ! 802: ppa_d_pulse(ppb, 0x3c); ! 803: ppa_d_pulse(ppb, 0x20); ! 804: ppa_d_pulse(ppb, 0xf); ! 805: } ! 806: ! 807: static inline void ppa_c_pulse(unsigned short ppb, unsigned char b) ! 808: { ! 809: w_dtr(ppb, b); ! 810: w_ctr(ppb, 0x4); ! 811: w_ctr(ppb, 0x6); ! 812: w_ctr(ppb, 0x4); ! 813: w_ctr(ppb, 0xc); ! 814: } ! 815: ! 816: static inline void ppa_connect(int host_no, int flag) ! 817: { ! 818: unsigned short ppb = PPA_BASE(host_no); ! 819: ! 820: ppa_c_pulse(ppb, 0); ! 821: ppa_c_pulse(ppb, 0x3c); ! 822: ppa_c_pulse(ppb, 0x20); ! 823: if ((flag == CONNECT_EPP_MAYBE) && ! 824: IN_EPP_MODE(ppa_hosts[host_no].mode)) ! 825: ppa_c_pulse(ppb, 0xcf); ! 826: else ! 827: ppa_c_pulse(ppb, 0x8f); ! 828: } ! 829: ! 830: static int ppa_select(int host_no, int target) ! 831: { ! 832: int k; ! 833: unsigned short ppb = PPA_BASE(host_no); ! 834: ! 835: /* ! 836: * Bit 6 (0x40) is the device selected bit. ! 837: * First we must wait till the current device goes off line... ! 838: */ ! 839: k = PPA_SELECT_TMO; ! 840: do { ! 841: k--; ! 842: } while ((r_str(ppb) & 0x40) && (k)); ! 843: if (!k) ! 844: return 0; ! 845: ! 846: w_dtr(ppb, (1 << target)); ! 847: w_ctr(ppb, 0xe); ! 848: w_ctr(ppb, 0xc); ! 849: w_dtr(ppb, 0x80); /* This is NOT the initator */ ! 850: w_ctr(ppb, 0x8); ! 851: ! 852: k = PPA_SELECT_TMO; ! 853: do { ! 854: k--; ! 855: } ! 856: while (!(r_str(ppb) & 0x40) && (k)); ! 857: if (!k) ! 858: return 0; ! 859: ! 860: return 1; ! 861: } ! 862: ! 863: /* ! 864: * This is based on a trace of what the Iomega DOS 'guest' driver does. ! 865: * I've tried several different kinds of parallel ports with guest and ! 866: * coded this to react in the same ways that it does. ! 867: * ! 868: * The return value from this function is just a hint about where the ! 869: * handshaking failed. ! 870: * ! 871: */ ! 872: static int ppa_init(int host_no) ! 873: { ! 874: int retv; ! 875: unsigned short ppb = PPA_BASE(host_no); ! 876: ! 877: ppa_disconnect(host_no); ! 878: ppa_connect(host_no, CONNECT_NORMAL); ! 879: ! 880: retv = 2; /* Failed */ ! 881: ! 882: w_ctr(ppb, 0xe); ! 883: if ((r_str(ppb) & 0x08) == 0x08) ! 884: retv--; ! 885: ! 886: w_ctr(ppb, 0xc); ! 887: if ((r_str(ppb) & 0x08) == 0x00) ! 888: retv--; ! 889: ! 890: /* This is a SCSI BUS reset signal */ ! 891: if (!retv) { ! 892: w_dtr(ppb, 0x40); ! 893: w_ctr(ppb, 0x08); ! 894: udelay(30); ! 895: w_ctr(ppb, 0x0c); ! 896: udelay(1000); /* Allow devices to settle down */ ! 897: } ! 898: ppa_disconnect(host_no); ! 899: udelay(1000); /* Another delay to allow devices to settle */ ! 900: ! 901: if (!retv) ! 902: retv = device_check(host_no); ! 903: ! 904: return retv; ! 905: } ! 906: ! 907: static inline int ppa_send_command(Scsi_Cmnd * cmd) ! 908: { ! 909: int host_no = cmd->host->unique_id; ! 910: int k; ! 911: ! 912: w_ctr(PPA_BASE(host_no), 0x0c); ! 913: ! 914: for (k = 0; k < cmd->cmd_len; k++) ! 915: if (!ppa_out(host_no, &cmd->cmnd[k], 1)) ! 916: return 0; ! 917: return 1; ! 918: } ! 919: ! 920: /* ! 921: * The bulk flag enables some optimisations in the data transfer loops, ! 922: * it should be true for any command that transfers data in integral ! 923: * numbers of sectors. ! 924: * ! 925: * The driver appears to remain stable if we speed up the parallel port ! 926: * i/o in this function, but not elsewhere. ! 927: */ ! 928: static int ppa_completion(Scsi_Cmnd * cmd) ! 929: { ! 930: /* Return codes: ! 931: * -1 Error ! 932: * 0 Told to schedule ! 933: * 1 Finished data transfer ! 934: */ ! 935: int host_no = cmd->host->unique_id; ! 936: unsigned short ppb = PPA_BASE(host_no); ! 937: unsigned long start_jiffies = jiffies; ! 938: ! 939: unsigned char r, v; ! 940: int fast, bulk, status; ! 941: ! 942: v = cmd->cmnd[0]; ! 943: bulk = ((v == READ_6) || ! 944: (v == READ_10) || ! 945: (v == WRITE_6) || ! 946: (v == WRITE_10)); ! 947: ! 948: /* ! 949: * We only get here if the drive is ready to comunicate, ! 950: * hence no need for a full ppa_wait. ! 951: */ ! 952: r = (r_str(ppb) & 0xf0); ! 953: ! 954: while (r != (unsigned char) 0xf0) { ! 955: /* ! 956: * If we have been running for more than a full timer tick ! 957: * then take a rest. ! 958: */ ! 959: if (jiffies > start_jiffies + 1) ! 960: return 0; ! 961: ! 962: if (((r & 0xc0) != 0xc0) || (cmd->SCp.this_residual <= 0)) { ! 963: ppa_fail(host_no, DID_ERROR); ! 964: return -1; /* ERROR_RETURN */ ! 965: } ! 966: /* determine if we should use burst I/O */ fast = (bulk && (cmd->SCp.this_residual >= PPA_BURST_SIZE)) ! 967: ? PPA_BURST_SIZE : 1; ! 968: ! 969: if (r == (unsigned char) 0xc0) ! 970: status = ppa_out(host_no, cmd->SCp.ptr, fast); ! 971: else ! 972: status = ppa_in(host_no, cmd->SCp.ptr, fast); ! 973: ! 974: cmd->SCp.ptr += fast; ! 975: cmd->SCp.this_residual -= fast; ! 976: ! 977: if (!status) { ! 978: ppa_fail(host_no, DID_BUS_BUSY); ! 979: return -1; /* ERROR_RETURN */ ! 980: } ! 981: if (cmd->SCp.buffer && !cmd->SCp.this_residual) { ! 982: /* if scatter/gather, advance to the next segment */ ! 983: if (cmd->SCp.buffers_residual--) { ! 984: cmd->SCp.buffer++; ! 985: cmd->SCp.this_residual = cmd->SCp.buffer->length; ! 986: cmd->SCp.ptr = cmd->SCp.buffer->address; ! 987: } ! 988: } ! 989: /* Now check to see if the drive is ready to comunicate */ ! 990: r = (r_str(ppb) & 0xf0); ! 991: /* If not, drop back down to the scheduler and wait a timer tick */ ! 992: if (!(r & 0x80)) ! 993: return 0; ! 994: } ! 995: return 1; /* FINISH_RETURN */ ! 996: } ! 997: ! 998: /* ! 999: * Since the PPA itself doesn't generate interrupts, we use ! 1000: * the scheduler's task queue to generate a stream of call-backs and ! 1001: * complete the request when the drive is ready. ! 1002: */ ! 1003: static void ppa_interrupt(void *data) ! 1004: { ! 1005: ppa_struct *tmp = (ppa_struct *) data; ! 1006: Scsi_Cmnd *cmd = tmp->cur_cmd; ! 1007: ! 1008: if (!cmd) { ! 1009: printk("PPA: bug in ppa_interrupt\n"); ! 1010: return; ! 1011: } ! 1012: if (ppa_engine(tmp, cmd)) { ! 1013: tmp->ppa_tq.data = (void *) tmp; ! 1014: tmp->ppa_tq.sync = 0; ! 1015: queue_task(&tmp->ppa_tq, &tq_timer); ! 1016: return; ! 1017: } ! 1018: /* Command must of completed hence it is safe to let go... */ ! 1019: #if PPA_DEBUG > 0 ! 1020: switch ((cmd->result >> 16) & 0xff) { ! 1021: case DID_OK: ! 1022: break; ! 1023: case DID_NO_CONNECT: ! 1024: printk("ppa: no device at SCSI ID %i\n", cmd->target); ! 1025: break; ! 1026: case DID_BUS_BUSY: ! 1027: printk("ppa: BUS BUSY - EPP timeout detected\n"); ! 1028: break; ! 1029: case DID_TIME_OUT: ! 1030: printk("ppa: unknown timeout\n"); ! 1031: break; ! 1032: case DID_ABORT: ! 1033: printk("ppa: told to abort\n"); ! 1034: break; ! 1035: case DID_PARITY: ! 1036: printk("ppa: parity error (???)\n"); ! 1037: break; ! 1038: case DID_ERROR: ! 1039: printk("ppa: internal driver error\n"); ! 1040: break; ! 1041: case DID_RESET: ! 1042: printk("ppa: told to reset device\n"); ! 1043: break; ! 1044: case DID_BAD_INTR: ! 1045: printk("ppa: bad interrupt (???)\n"); ! 1046: break; ! 1047: default: ! 1048: printk("ppa: bad return code (%02x)\n", (cmd->result >> 16) & 0xff); ! 1049: } ! 1050: #endif ! 1051: ! 1052: if (cmd->SCp.phase > 1) ! 1053: ppa_disconnect(cmd->host->unique_id); ! 1054: ! 1055: tmp->cur_cmd = 0; ! 1056: cmd->scsi_done(cmd); ! 1057: return; ! 1058: } ! 1059: ! 1060: static int ppa_engine(ppa_struct * tmp, Scsi_Cmnd * cmd) ! 1061: { ! 1062: int host_no = cmd->host->unique_id; ! 1063: unsigned short ppb = PPA_BASE(host_no); ! 1064: unsigned char l = 0, h = 0; ! 1065: int retv; ! 1066: ! 1067: /* First check for any errors that may have occurred ! 1068: * Here we check for internal errors ! 1069: */ ! 1070: if (tmp->failed) ! 1071: return 0; ! 1072: ! 1073: switch (cmd->SCp.phase) { ! 1074: case 0: /* Phase 0 - Waiting for parport */ ! 1075: if ((jiffies - tmp->jstart) > HZ) { ! 1076: /* ! 1077: * We waited more than a second ! 1078: * for parport to call us ! 1079: */ ! 1080: ppa_fail(host_no, DID_BUS_BUSY); ! 1081: return 0; ! 1082: } ! 1083: return 1; /* wait until ppa_wakeup claims parport */ ! 1084: case 1: /* Phase 1 - Connected */ ! 1085: { /* Perform a sanity check for cable unplugged */ ! 1086: int retv = 2; /* Failed */ ! 1087: ! 1088: ppa_connect(host_no, CONNECT_EPP_MAYBE); ! 1089: ! 1090: w_ctr(ppb, 0xe); ! 1091: if ((r_str(ppb) & 0x08) == 0x08) ! 1092: retv--; ! 1093: ! 1094: w_ctr(ppb, 0xc); ! 1095: if ((r_str(ppb) & 0x08) == 0x00) ! 1096: retv--; ! 1097: ! 1098: if (retv) ! 1099: if ((jiffies - tmp->jstart) > (1 * HZ)) { ! 1100: printk("ppa: Parallel port cable is unplugged!!\n"); ! 1101: ppa_fail(host_no, DID_BUS_BUSY); ! 1102: return 0; ! 1103: } else { ! 1104: ppa_disconnect(host_no); ! 1105: return 1; /* Try again in a jiffy */ ! 1106: } ! 1107: cmd->SCp.phase++; ! 1108: } ! 1109: ! 1110: case 2: /* Phase 2 - We are now talking to the scsi bus */ ! 1111: if (!ppa_select(host_no, cmd->target)) { ! 1112: ppa_fail(host_no, DID_NO_CONNECT); ! 1113: return 0; ! 1114: } ! 1115: cmd->SCp.phase++; ! 1116: ! 1117: case 3: /* Phase 3 - Ready to accept a command */ ! 1118: w_ctr(ppb, 0x0c); ! 1119: if (!(r_str(ppb) & 0x80)) ! 1120: return 1; ! 1121: ! 1122: if (!ppa_send_command(cmd)) ! 1123: return 0; ! 1124: cmd->SCp.phase++; ! 1125: ! 1126: case 4: /* Phase 4 - Setup scatter/gather buffers */ ! 1127: if (cmd->use_sg) { ! 1128: /* if many buffers are available, start filling the first */ ! 1129: cmd->SCp.buffer = (struct scatterlist *) cmd->request_buffer; ! 1130: cmd->SCp.this_residual = cmd->SCp.buffer->length; ! 1131: cmd->SCp.ptr = cmd->SCp.buffer->address; ! 1132: } else { ! 1133: /* else fill the only available buffer */ ! 1134: cmd->SCp.buffer = NULL; ! 1135: cmd->SCp.this_residual = cmd->request_bufflen; ! 1136: cmd->SCp.ptr = cmd->request_buffer; ! 1137: } ! 1138: cmd->SCp.buffers_residual = cmd->use_sg; ! 1139: cmd->SCp.phase++; ! 1140: ! 1141: case 5: /* Phase 5 - Data transfer stage */ ! 1142: w_ctr(ppb, 0x0c); ! 1143: if (!(r_str(ppb) & 0x80)) ! 1144: return 1; ! 1145: ! 1146: retv = ppa_completion(cmd); ! 1147: if (retv == -1) ! 1148: return 0; ! 1149: if (retv == 0) ! 1150: return 1; ! 1151: cmd->SCp.phase++; ! 1152: ! 1153: case 6: /* Phase 6 - Read status/message */ ! 1154: cmd->result = DID_OK << 16; ! 1155: /* Check for data overrun */ ! 1156: if (ppa_wait(host_no) != (unsigned char) 0xf0) { ! 1157: ppa_fail(host_no, DID_ERROR); ! 1158: return 0; ! 1159: } ! 1160: if (ppa_in(host_no, &l, 1)) { /* read status byte */ ! 1161: /* Check for optional message byte */ ! 1162: if (ppa_wait(host_no) == (unsigned char) 0xf0) ! 1163: ppa_in(host_no, &h, 1); ! 1164: cmd->result = (DID_OK << 16) + (h << 8) + (l & STATUS_MASK); ! 1165: } ! 1166: return 0; /* Finished */ ! 1167: break; ! 1168: ! 1169: default: ! 1170: printk("ppa: Invalid scsi phase\n"); ! 1171: } ! 1172: return 0; ! 1173: } ! 1174: ! 1175: int ppa_queuecommand(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *)) ! 1176: { ! 1177: int host_no = cmd->host->unique_id; ! 1178: ! 1179: if (ppa_hosts[host_no].cur_cmd) { ! 1180: printk("PPA: bug in ppa_queuecommand\n"); ! 1181: return 0; ! 1182: } ! 1183: ppa_hosts[host_no].failed = 0; ! 1184: ppa_hosts[host_no].jstart = jiffies; ! 1185: ppa_hosts[host_no].cur_cmd = cmd; ! 1186: cmd->scsi_done = done; ! 1187: cmd->result = DID_ERROR << 16; /* default return code */ ! 1188: cmd->SCp.phase = 0; /* bus free */ ! 1189: ! 1190: ppa_pb_claim(host_no); ! 1191: ! 1192: ppa_hosts[host_no].ppa_tq.data = ppa_hosts + host_no; ! 1193: ppa_hosts[host_no].ppa_tq.sync = 0; ! 1194: queue_task(&ppa_hosts[host_no].ppa_tq, &tq_immediate); ! 1195: mark_bh(IMMEDIATE_BH); ! 1196: ! 1197: return 0; ! 1198: } ! 1199: ! 1200: /* ! 1201: * Apparently the disk->capacity attribute is off by 1 sector ! 1202: * for all disk drives. We add the one here, but it should really ! 1203: * be done in sd.c. Even if it gets fixed there, this will still ! 1204: * work. ! 1205: */ ! 1206: int ppa_biosparam(Disk * disk, kdev_t dev, int ip[]) ! 1207: { ! 1208: ip[0] = 0x40; ! 1209: ip[1] = 0x20; ! 1210: ip[2] = (disk->capacity + 1) / (ip[0] * ip[1]); ! 1211: if (ip[2] > 1024) { ! 1212: ip[0] = 0xff; ! 1213: ip[1] = 0x3f; ! 1214: ip[2] = (disk->capacity + 1) / (ip[0] * ip[1]); ! 1215: if (ip[2] > 1023) ! 1216: ip[2] = 1023; ! 1217: } ! 1218: return 0; ! 1219: } ! 1220: ! 1221: int ppa_abort(Scsi_Cmnd * cmd) ! 1222: { ! 1223: /* ! 1224: * There is no method for aborting commands since Iomega ! 1225: * have tied the SCSI_MESSAGE line high in the interface ! 1226: */ ! 1227: ! 1228: switch (cmd->SCp.phase) { ! 1229: case 0: /* Do not have access to parport */ ! 1230: case 1: /* Have not connected to interface */ ! 1231: cmd->result = DID_ABORT; ! 1232: cmd->done(cmd); ! 1233: return SCSI_ABORT_SUCCESS; ! 1234: break; ! 1235: default: /* SCSI command sent, can not abort */ ! 1236: return SCSI_ABORT_BUSY; ! 1237: break; ! 1238: } ! 1239: } ! 1240: ! 1241: int ppa_reset(Scsi_Cmnd * cmd, unsigned int x) ! 1242: { ! 1243: int host_no = cmd->host->unique_id; ! 1244: int ppb = PPA_BASE(host_no); ! 1245: ! 1246: /* ! 1247: * PHASE1: ! 1248: * Bring the interface crashing down on whatever is running ! 1249: * hopefully this will kill the request. ! 1250: * Bring back up the interface, reset the drive (and anything ! 1251: * attached for that manner) ! 1252: */ ! 1253: if (cmd) ! 1254: if (cmd->SCp.phase) ! 1255: ppa_disconnect(cmd->host->unique_id); ! 1256: ! 1257: ppa_connect(host_no, CONNECT_NORMAL); ! 1258: w_dtr(ppb, 0x40); ! 1259: w_ctr(ppb, 0x8); ! 1260: udelay(30); ! 1261: w_ctr(ppb, 0xc); ! 1262: udelay(1000); /* delay for devices to settle down */ ! 1263: ppa_disconnect(host_no); ! 1264: udelay(1000); /* Additional delay to allow devices to settle down */ ! 1265: ! 1266: /* ! 1267: * PHASE2: ! 1268: * Sanity check for the sake of mid-level driver ! 1269: */ ! 1270: if (!cmd) { ! 1271: printk("ppa bus reset called for invalid command.\n"); ! 1272: return SCSI_RESET_NOT_RUNNING; ! 1273: } ! 1274: /* ! 1275: * PHASE3: ! 1276: * Flag the current command as having died due to reset ! 1277: */ ! 1278: ppa_connect(host_no, CONNECT_NORMAL); ! 1279: ppa_fail(host_no, DID_RESET); ! 1280: ! 1281: /* Since the command was already on the timer queue ppa_interrupt ! 1282: * will be called shortly. ! 1283: */ ! 1284: return SCSI_RESET_PENDING; ! 1285: } ! 1286: ! 1287: static int device_check(int host_no) ! 1288: { ! 1289: /* This routine looks for a device and then attempts to use EPP ! 1290: to send a command. If all goes as planned then EPP is available. */ ! 1291: ! 1292: static char cmd[6] = ! 1293: {0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; ! 1294: int loop, old_mode, status, k, ppb = PPA_BASE(host_no); ! 1295: unsigned char l; ! 1296: ! 1297: old_mode = ppa_hosts[host_no].mode; ! 1298: for (loop = 0; loop < 8; loop++) { ! 1299: /* Attempt to use EPP for Test Unit Ready */ ! 1300: if ((ppb & 0x0007) == 0x0000) ! 1301: ppa_hosts[host_no].mode = PPA_EPP_32; ! 1302: ! 1303: second_pass: ! 1304: ppa_connect(host_no, CONNECT_EPP_MAYBE); ! 1305: /* Select SCSI device */ ! 1306: if (!ppa_select(host_no, loop)) { ! 1307: ppa_disconnect(host_no); ! 1308: continue; ! 1309: } ! 1310: printk("ppa: Found device at ID %i, Attempting to use %s\n", loop, ! 1311: PPA_MODE_STRING[ppa_hosts[host_no].mode]); ! 1312: ! 1313: /* Send SCSI command */ ! 1314: status = 1; ! 1315: w_ctr(ppb, 0x0c); ! 1316: for (l = 0; (l < 6) && (status); l++) ! 1317: status = ppa_out(host_no, cmd, 1); ! 1318: ! 1319: if (!status) { ! 1320: ppa_disconnect(host_no); ! 1321: ppa_connect(host_no, CONNECT_EPP_MAYBE); ! 1322: w_dtr(ppb, 0x40); ! 1323: w_ctr(ppb, 0x08); ! 1324: udelay(30); ! 1325: w_ctr(ppb, 0x0c); ! 1326: udelay(1000); ! 1327: ppa_disconnect(host_no); ! 1328: udelay(1000); ! 1329: if (ppa_hosts[host_no].mode == PPA_EPP_32) { ! 1330: ppa_hosts[host_no].mode = old_mode; ! 1331: goto second_pass; ! 1332: } ! 1333: printk("ppa: Unable to establish communication, aborting driver load.\n"); ! 1334: return 1; ! 1335: } ! 1336: w_ctr(ppb, 0x0c); ! 1337: k = 1000000; /* 1 Second */ ! 1338: do { ! 1339: l = r_str(ppb); ! 1340: k--; ! 1341: udelay(1); ! 1342: } while (!(l & 0x80) && (k)); ! 1343: ! 1344: l &= 0xf0; ! 1345: ! 1346: if (l != 0xf0) { ! 1347: ppa_disconnect(host_no); ! 1348: ppa_connect(host_no, CONNECT_EPP_MAYBE); ! 1349: w_dtr(ppb, 0x40); ! 1350: w_ctr(ppb, 0x08); ! 1351: udelay(30); ! 1352: w_ctr(ppb, 0x0c); ! 1353: udelay(1000); ! 1354: ppa_disconnect(host_no); ! 1355: udelay(1000); ! 1356: if (ppa_hosts[host_no].mode == PPA_EPP_32) { ! 1357: ppa_hosts[host_no].mode = old_mode; ! 1358: goto second_pass; ! 1359: } ! 1360: printk("ppa: Unable to establish communication, aborting driver load.\n"); ! 1361: return 1; ! 1362: } ! 1363: ppa_disconnect(host_no); ! 1364: printk("ppa: Communication established with ID %i using %s\n", loop, ! 1365: PPA_MODE_STRING[ppa_hosts[host_no].mode]); ! 1366: return 0; ! 1367: } ! 1368: printk("ppa: No devices found, aborting driver load.\n"); ! 1369: return 1; ! 1370: } ! 1371: ! 1372: #define PPA_ID "ppa: " ! 1373: ! 1374: int port_probe(unsigned short port) ! 1375: { ! 1376: int retv = 0; ! 1377: unsigned char a, b, c; ! 1378: unsigned int i, j; ! 1379: ! 1380: ! 1381: printk(PPA_ID "Probing port %04x\n", port); ! 1382: ! 1383: /* ##### ###### ###### ! 1384: * # # # # # # ! 1385: * # # # # # ! 1386: * ##### ###### ###### ! 1387: * # # # ! 1388: * # # # # ! 1389: * ##### # # ! 1390: */ ! 1391: ! 1392: outb(0x0c, port + 0x402); ! 1393: outb(0x0c, port + 0x002); ! 1394: outb(0x55, port); ! 1395: a = inb(port); ! 1396: if (a != 0x55) ! 1397: return retv; ! 1398: printk(PPA_ID " SPP port present\n"); ! 1399: ! 1400: retv += PPA_PROBE_SPP; ! 1401: ! 1402: /* ####### ##### ###### ! 1403: * # # # # # ! 1404: * # # # # ! 1405: * ##### # ###### ! 1406: * # # # ! 1407: * # # # # ! 1408: * ####### ##### # ! 1409: */ ! 1410: ! 1411: for (i = 1024; i > 0; i--) { /* clear at most 1k of data from FIFO */ ! 1412: a = inb(port + 0x402); ! 1413: if ((a & 0x03) == 0x03) ! 1414: goto no_ecp; ! 1415: if (a & 0x01) ! 1416: break; ! 1417: inb(port + 0x400); /* Remove byte from FIFO */ ! 1418: } ! 1419: ! 1420: if (i <= 0) ! 1421: goto no_ecp; ! 1422: ! 1423: b = a ^ 3; ! 1424: outb(b, port + 0x402); ! 1425: c = inb(port + 0x402); ! 1426: ! 1427: if (a == c) { ! 1428: outb(0xc0, port + 0x402); /* FIFO test */ ! 1429: j = 0; ! 1430: while (!(inb(port + 0x402) & 0x01) && (j < 1024)) { ! 1431: inb(port + 0x400); ! 1432: j++; ! 1433: } ! 1434: if (j >= 1024) ! 1435: goto no_ecp; ! 1436: i = 0; ! 1437: j = 0; ! 1438: while (!(inb(port + 0x402) & 0x02) && (j < 1024)) { ! 1439: outb(0x00, port + 0x400); ! 1440: i++; ! 1441: j++; ! 1442: } ! 1443: if (j >= 1024) ! 1444: goto no_ecp; ! 1445: j = 0; ! 1446: while (!(inb(port + 0x402) & 0x01) && (j < 1024)) { ! 1447: inb(port + 0x400); ! 1448: j++; ! 1449: } ! 1450: if (j >= 1024) ! 1451: goto no_ecp; ! 1452: printk(PPA_ID " ECP with a %i byte FIFO present\n", i); ! 1453: ! 1454: retv += PPA_PROBE_ECR; ! 1455: } ! 1456: /* ###### ##### ##### ! 1457: * # # # # # # ! 1458: * # # # # ! 1459: * ###### ##### ##### ! 1460: * # # # ! 1461: * # # # # ! 1462: * # ##### ####### ! 1463: */ ! 1464: ! 1465: no_ecp: ! 1466: if (retv & PPA_PROBE_ECR) ! 1467: outb(0x20, port + 0x402); ! 1468: ! 1469: outb(0x55, port); ! 1470: outb(0x0c, port + 2); ! 1471: a = inb(port); ! 1472: outb(0x55, port); ! 1473: outb(0x2c, port + 2); ! 1474: b = inb(port); ! 1475: if (a != b) { ! 1476: printk(PPA_ID " PS/2 bidirectional port present\n"); ! 1477: retv += PPA_PROBE_PS2; ! 1478: } ! 1479: /* ####### ###### ###### ! 1480: * # # # # # ! 1481: * # # # # # ! 1482: * ##### ###### ###### ! 1483: * # # # ! 1484: * # # # ! 1485: * ####### # # ! 1486: */ ! 1487: ! 1488: if (port & 0x007) { ! 1489: printk(PPA_ID " EPP not supported at this address\n"); ! 1490: return retv; ! 1491: } ! 1492: if (retv & PPA_PROBE_ECR) { ! 1493: for (i = 0x00; i < 0x80; i += 0x20) { ! 1494: outb(i, port + 0x402); ! 1495: ! 1496: a = inb(port + 1); ! 1497: outb(a, port + 1); ! 1498: outb(a & 0xfe, port + 1); ! 1499: a = inb(port + 1); ! 1500: if (!(a & 0x01)) { ! 1501: printk(PPA_ID " Failed Intel bug check. (Phony EPP in ECP)\n"); ! 1502: return retv; ! 1503: } ! 1504: } ! 1505: printk(PPA_ID " Passed Intel bug check.\n"); ! 1506: outb(0x80, port + 0x402); ! 1507: } ! 1508: a = inb(port + 1); ! 1509: outb(a, port + 1); ! 1510: outb(a & 0xfe, port + 1); ! 1511: a = inb(port + 1); ! 1512: ! 1513: if (a & 0x01) { ! 1514: outb(0x0c, port + 0x402); ! 1515: outb(0x0c, port + 0x002); ! 1516: return retv; ! 1517: } ! 1518: ! 1519: outb(0x04, port + 2); ! 1520: inb(port + 4); ! 1521: a = inb(port + 1); ! 1522: outb(a, port + 1); ! 1523: outb(a & 0xfe, port + 1); ! 1524: ! 1525: if (a & 0x01) { ! 1526: printk(PPA_ID " EPP 1.9 with hardware direction protocol\n"); ! 1527: retv += PPA_PROBE_EPP19; ! 1528: } else { ! 1529: /* The EPP timeout bit was not set, this could either be: ! 1530: * EPP 1.7 ! 1531: * EPP 1.9 with software direction ! 1532: */ ! 1533: outb(0x24, port + 2); ! 1534: inb(port + 4); ! 1535: a = inb(port + 1); ! 1536: outb(a, port + 1); ! 1537: outb(a & 0xfe, port + 1); ! 1538: if (a & 0x01) { ! 1539: printk(PPA_ID " EPP 1.9 with software direction protocol\n"); ! 1540: retv += PPA_PROBE_EPP19; ! 1541: } else { ! 1542: printk(PPA_ID " EPP 1.7\n"); ! 1543: retv += PPA_PROBE_EPP17; ! 1544: } ! 1545: } ! 1546: ! 1547: outb(0x0c, port + 0x402); ! 1548: outb(0x0c, port + 0x002); ! 1549: return retv; ! 1550: }
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