drivers/scsi/pcmcia/sym53c500_cs.c

   1 /*
   2 *  sym53c500_cs.c       Bob Tracy (rct@frus.com)
   3 *
   4 *  A rewrite of the pcmcia-cs add-on driver for newer (circa 1997)
   5 *  New Media Bus Toaster PCMCIA SCSI cards using the Symbios Logic
   6 *  53c500 controller: intended for use with 2.6 and later kernels.
   7 *  The pcmcia-cs add-on version of this driver is not supported
   8 *  beyond 2.4.  It consisted of three files with history/copyright
   9 *  information as follows:
  10 *
  11 *  SYM53C500.h
  12 *       Bob Tracy (rct@frus.com)
  13 *       Original by Tom Corner (tcorner@via.at).
  14 *       Adapted from NCR53c406a.h which is Copyrighted (C) 1994
  15 *       Normunds Saumanis (normunds@rx.tech.swh.lv)
  16 *
  17 *  SYM53C500.c
  18 *       Bob Tracy (rct@frus.com)
  19 *       Original driver by Tom Corner (tcorner@via.at) was adapted
  20 *       from NCR53c406a.c which is Copyrighted (C) 1994, 1995, 1996
  21 *       Normunds Saumanis (normunds@fi.ibm.com)
  22 *
  23 *  sym53c500.c
  24 *       Bob Tracy (rct@frus.com)
  25 *       Original by Tom Corner (tcorner@via.at) was adapted from a
  26 *       driver for the Qlogic SCSI card written by
  27 *       David Hinds (dhinds@allegro.stanford.edu).
  28 *
  29 *  This program is free software; you can redistribute it and/or modify it
  30 *  under the terms of the GNU General Public License as published by the
  31 *  Free Software Foundation; either version 2, or (at your option) any
  32 *  later version.
  33 *
  34 *  This program is distributed in the hope that it will be useful, but
  35 *  WITHOUT ANY WARRANTY; without even the implied warranty of
  36 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  37 *  General Public License for more details.
  38 */
  39
  40 #define SYM53C500_DEBUG 0
  41 #define VERBOSE_SYM53C500_DEBUG 0
  42
  43 /*
  44 *  Set this to 0 if you encounter kernel lockups while transferring
  45 *  data in PIO mode.  Note this can be changed via "sysfs".
  46 */
  47 #define USE_FAST_PIO 1
  48
  49 /* =============== End of user configurable parameters ============== */
  50
  51 #include <linux/module.h>
  52 #include <linux/moduleparam.h>
  53 #include <linux/errno.h>
  54 #include <linux/init.h>
  55 #include <linux/interrupt.h>
  56 #include <linux/kernel.h>
  57 #include <linux/sched.h>
  58 #include <linux/slab.h>
  59 #include <linux/string.h>
  60 #include <linux/ioport.h>
  61 #include <linux/blkdev.h>
  62 #include <linux/spinlock.h>
  63 #include <linux/bitops.h>
  64
  65 #include <asm/io.h>
  66 #include <asm/dma.h>
  67 #include <asm/irq.h>
  68
  69 #include <scsi/scsi_ioctl.h>
  70 #include <scsi/scsi_cmnd.h>
  71 #include <scsi/scsi_device.h>
  72 #include <scsi/scsi.h>
  73 #include <scsi/scsi_host.h>
  74
  75 #include <pcmcia/cs_types.h>
  76 #include <pcmcia/cs.h>
  77 #include <pcmcia/cistpl.h>
  78 #include <pcmcia/ds.h>
  79 #include <pcmcia/ciscode.h>
  80
  81 /* ================================================================== */
  82
  83 #ifdef PCMCIA_DEBUG
  84 static int pc_debug = PCMCIA_DEBUG;
  85 module_param(pc_debug, int, 0);
  86 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
  87 static char *version =
  88 "sym53c500_cs.c 0.9c 2004/10/27 (Bob Tracy)";
  89 #else
  90 #define DEBUG(n, args...)
  91 #endif
  92
  93 /* ================================================================== */
  94
  95 #define SYNC_MODE 0             /* Synchronous transfer mode */
  96
  97 /* Default configuration */
  98 #define C1_IMG   0x07           /* ID=7 */
  99 #define C2_IMG   0x48           /* FE SCSI2 */
 100 #define C3_IMG   0x20           /* CDB */
 101 #define C4_IMG   0x04           /* ANE */
 102 #define C5_IMG   0xa4           /* ? changed from b6= AA PI SIE POL */
 103 #define C7_IMG   0x80           /* added for SYM53C500 t. corner */
 104
 105 /* Hardware Registers: offsets from io_port (base) */
 106
 107 /* Control Register Set 0 */
 108 #define TC_LSB          0x00            /* transfer counter lsb */
 109 #define TC_MSB          0x01            /* transfer counter msb */
 110 #define SCSI_FIFO       0x02            /* scsi fifo register */
 111 #define CMD_REG         0x03            /* command register */
 112 #define STAT_REG        0x04            /* status register */
 113 #define DEST_ID         0x04            /* selection/reselection bus id */
 114 #define INT_REG         0x05            /* interrupt status register */
 115 #define SRTIMOUT        0x05            /* select/reselect timeout reg */
 116 #define SEQ_REG         0x06            /* sequence step register */
 117 #define SYNCPRD         0x06            /* synchronous transfer period */
 118 #define FIFO_FLAGS      0x07            /* indicates # of bytes in fifo */
 119 #define SYNCOFF         0x07            /* synchronous offset register */
 120 #define CONFIG1         0x08            /* configuration register */
 121 #define CLKCONV         0x09            /* clock conversion register */
 122 /* #define TESTREG      0x0A */         /* test mode register */
 123 #define CONFIG2         0x0B            /* configuration 2 register */
 124 #define CONFIG3         0x0C            /* configuration 3 register */
 125 #define CONFIG4         0x0D            /* configuration 4 register */
 126 #define TC_HIGH         0x0E            /* transfer counter high */
 127 /* #define FIFO_BOTTOM  0x0F */         /* reserve FIFO byte register */
 128
 129 /* Control Register Set 1 */
 130 /* #define JUMPER_SENSE 0x00 */         /* jumper sense port reg (r/w) */
 131 /* #define SRAM_PTR     0x01 */         /* SRAM address pointer reg (r/w) */
 132 /* #define SRAM_DATA    0x02 */         /* SRAM data register (r/w) */
 133 #define PIO_FIFO        0x04            /* PIO FIFO registers (r/w) */
 134 /* #define PIO_FIFO1    0x05 */         /*  */
 135 /* #define PIO_FIFO2    0x06 */         /*  */
 136 /* #define PIO_FIFO3    0x07 */         /*  */
 137 #define PIO_STATUS      0x08            /* PIO status (r/w) */
 138 /* #define ATA_CMD      0x09 */         /* ATA command/status reg (r/w) */
 139 /* #define ATA_ERR      0x0A */         /* ATA features/error reg (r/w) */
 140 #define PIO_FLAG        0x0B            /* PIO flag interrupt enable (r/w) */
 141 #define CONFIG5         0x09            /* configuration 5 register */
 142 /* #define SIGNATURE    0x0E */         /* signature register (r) */
 143 /* #define CONFIG6      0x0F */         /* configuration 6 register (r) */
 144 #define CONFIG7         0x0d
 145
 146 /* select register set 0 */
 147 #define REG0(x)         (outb(C4_IMG, (x) + CONFIG4))
 148 /* select register set 1 */
 149 #define REG1(x)         outb(C7_IMG, (x) + CONFIG7); outb(C5_IMG, (x) + CONFIG5)
 150
 151 #if SYM53C500_DEBUG
 152 #define DEB(x) x
 153 #else
 154 #define DEB(x)
 155 #endif
 156
 157 #if VERBOSE_SYM53C500_DEBUG
 158 #define VDEB(x) x
 159 #else
 160 #define VDEB(x)
 161 #endif
 162
 163 #define LOAD_DMA_COUNT(x, count) \
 164   outb(count & 0xff, (x) + TC_LSB); \
 165   outb((count >> 8) & 0xff, (x) + TC_MSB); \
 166   outb((count >> 16) & 0xff, (x) + TC_HIGH);
 167
 168 /* Chip commands */
 169 #define DMA_OP               0x80
 170
 171 #define SCSI_NOP             0x00
 172 #define FLUSH_FIFO           0x01
 173 #define CHIP_RESET           0x02
 174 #define SCSI_RESET           0x03
 175 #define RESELECT             0x40
 176 #define SELECT_NO_ATN        0x41
 177 #define SELECT_ATN           0x42
 178 #define SELECT_ATN_STOP      0x43
 179 #define ENABLE_SEL           0x44
 180 #define DISABLE_SEL          0x45
 181 #define SELECT_ATN3          0x46
 182 #define RESELECT3            0x47
 183 #define TRANSFER_INFO        0x10
 184 #define INIT_CMD_COMPLETE    0x11
 185 #define MSG_ACCEPT           0x12
 186 #define TRANSFER_PAD         0x18
 187 #define SET_ATN              0x1a
 188 #define RESET_ATN            0x1b
 189 #define SEND_MSG             0x20
 190 #define SEND_STATUS          0x21
 191 #define SEND_DATA            0x22
 192 #define DISCONN_SEQ          0x23
 193 #define TERMINATE_SEQ        0x24
 194 #define TARG_CMD_COMPLETE    0x25
 195 #define DISCONN              0x27
 196 #define RECV_MSG             0x28
 197 #define RECV_CMD             0x29
 198 #define RECV_DATA            0x2a
 199 #define RECV_CMD_SEQ         0x2b
 200 #define TARGET_ABORT_DMA     0x04
 201
 202 /* ================================================================== */
 203
 204 struct scsi_info_t {
 205         struct pcmcia_device    *p_dev;
 206         dev_node_t node;
 207         struct Scsi_Host *host;
 208         unsigned short manf_id;
 209 };
 210
 211 /*
 212 *  Repository for per-instance host data.
 213 */
 214 struct sym53c500_data {
 215         struct scsi_cmnd *current_SC;
 216         int fast_pio;
 217 };
 218
 219 enum Phase {
 220     idle,
 221     data_out,
 222     data_in,
 223     command_ph,
 224     status_ph,
 225     message_out,
 226     message_in
 227 };
 228
 229 /* ================================================================== */
 230
 231 static void
 232 chip_init(int io_port)
 233 {
 234         REG1(io_port);
 235         outb(0x01, io_port + PIO_STATUS);
 236         outb(0x00, io_port + PIO_FLAG);
 237
 238         outb(C4_IMG, io_port + CONFIG4);        /* REG0(io_port); */
 239         outb(C3_IMG, io_port + CONFIG3);
 240         outb(C2_IMG, io_port + CONFIG2);
 241         outb(C1_IMG, io_port + CONFIG1);
 242
 243         outb(0x05, io_port + CLKCONV);  /* clock conversion factor */
 244         outb(0x9C, io_port + SRTIMOUT); /* Selection timeout */
 245         outb(0x05, io_port + SYNCPRD);  /* Synchronous transfer period */
 246         outb(SYNC_MODE, io_port + SYNCOFF);     /* synchronous mode */
 247 }
 248
 249 static void
 250 SYM53C500_int_host_reset(int io_port)
 251 {
 252         outb(C4_IMG, io_port + CONFIG4);        /* REG0(io_port); */
 253         outb(CHIP_RESET, io_port + CMD_REG);
 254         outb(SCSI_NOP, io_port + CMD_REG);      /* required after reset */
 255         outb(SCSI_RESET, io_port + CMD_REG);
 256         chip_init(io_port);
 257 }
 258
 259 static __inline__ int
 260 SYM53C500_pio_read(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
 261 {
 262         int i;
 263         int len;        /* current scsi fifo size */
 264
 265         REG1(base);
 266         while (reqlen) {
 267                 i = inb(base + PIO_STATUS);
 268                 /* VDEB(printk("pio_status=%x\n", i)); */
 269                 if (i & 0x80)
 270                         return 0;
 271
 272                 switch (i & 0x1e) {
 273                 default:
 274                 case 0x10:      /* fifo empty */
 275                         len = 0;
 276                         break;
 277                 case 0x0:
 278                         len = 1;
 279                         break;
 280                 case 0x8:       /* fifo 1/3 full */
 281                         len = 42;
 282                         break;
 283                 case 0xc:       /* fifo 2/3 full */
 284                         len = 84;
 285                         break;
 286                 case 0xe:       /* fifo full */
 287                         len = 128;
 288                         break;
 289                 }
 290
 291                 if ((i & 0x40) && len == 0) { /* fifo empty and interrupt occurred */
 292                         return 0;
 293                 }
 294
 295                 if (len) {
 296                         if (len > reqlen)
 297                                 len = reqlen;
 298
 299                         if (fast_pio && len > 3) {
 300                                 insl(base + PIO_FIFO, request, len >> 2);
 301                                 request += len & 0xfc;
 302                                 reqlen -= len & 0xfc;
 303                         } else {
 304                                 while (len--) {
 305                                         *request++ = inb(base + PIO_FIFO);
 306                                         reqlen--;
 307                                 }
 308                         }
 309                 }
 310         }
 311         return 0;
 312 }
 313
 314 static __inline__ int
 315 SYM53C500_pio_write(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
 316 {
 317         int i = 0;
 318         int len;        /* current scsi fifo size */
 319
 320         REG1(base);
 321         while (reqlen && !(i & 0x40)) {
 322                 i = inb(base + PIO_STATUS);
 323                 /* VDEB(printk("pio_status=%x\n", i)); */
 324                 if (i & 0x80)   /* error */
 325                         return 0;
 326
 327                 switch (i & 0x1e) {
 328                 case 0x10:
 329                         len = 128;
 330                         break;
 331                 case 0x0:
 332                         len = 84;
 333                         break;
 334                 case 0x8:
 335                         len = 42;
 336                         break;
 337                 case 0xc:
 338                         len = 1;
 339                         break;
 340                 default:
 341                 case 0xe:
 342                         len = 0;
 343                         break;
 344                 }
 345
 346                 if (len) {
 347                         if (len > reqlen)
 348                                 len = reqlen;
 349
 350                         if (fast_pio && len > 3) {
 351                                 outsl(base + PIO_FIFO, request, len >> 2);
 352                                 request += len & 0xfc;
 353                                 reqlen -= len & 0xfc;
 354                         } else {
 355                                 while (len--) {
 356                                         outb(*request++, base + PIO_FIFO);
 357                                         reqlen--;
 358                                 }
 359                         }
 360                 }
 361         }
 362         return 0;
 363 }
 364
 365 static irqreturn_t
 366 SYM53C500_intr(int irq, void *dev_id)
 367 {
 368         unsigned long flags;
 369         struct Scsi_Host *dev = dev_id;
 370         DEB(unsigned char fifo_size;)
 371         DEB(unsigned char seq_reg;)
 372         unsigned char status, int_reg;
 373         unsigned char pio_status;
 374         struct scatterlist *sglist;
 375         unsigned int sgcount;
 376         int port_base = dev->io_port;
 377         struct sym53c500_data *data =
 378             (struct sym53c500_data *)dev->hostdata;
 379         struct scsi_cmnd *curSC = data->current_SC;
 380         int fast_pio = data->fast_pio;
 381
 382         spin_lock_irqsave(dev->host_lock, flags);
 383
 384         VDEB(printk("SYM53C500_intr called\n"));
 385
 386         REG1(port_base);
 387         pio_status = inb(port_base + PIO_STATUS);
 388         REG0(port_base);
 389         status = inb(port_base + STAT_REG);
 390         DEB(seq_reg = inb(port_base + SEQ_REG));
 391         int_reg = inb(port_base + INT_REG);
 392         DEB(fifo_size = inb(port_base + FIFO_FLAGS) & 0x1f);
 393
 394 #if SYM53C500_DEBUG
 395         printk("status=%02x, seq_reg=%02x, int_reg=%02x, fifo_size=%02x",
 396             status, seq_reg, int_reg, fifo_size);
 397         printk(", pio=%02x\n", pio_status);
 398 #endif /* SYM53C500_DEBUG */
 399
 400         if (int_reg & 0x80) {   /* SCSI reset intr */
 401                 DEB(printk("SYM53C500: reset intr received\n"));
 402                 curSC->result = DID_RESET << 16;
 403                 goto idle_out;
 404         }
 405
 406         if (pio_status & 0x80) {
 407                 printk("SYM53C500: Warning: PIO error!\n");
 408                 curSC->result = DID_ERROR << 16;
 409                 goto idle_out;
 410         }
 411
 412         if (status & 0x20) {            /* Parity error */
 413                 printk("SYM53C500: Warning: parity error!\n");
 414                 curSC->result = DID_PARITY << 16;
 415                 goto idle_out;
 416         }
 417
 418         if (status & 0x40) {            /* Gross error */
 419                 printk("SYM53C500: Warning: gross error!\n");
 420                 curSC->result = DID_ERROR << 16;
 421                 goto idle_out;
 422         }
 423
 424         if (int_reg & 0x20) {           /* Disconnect */
 425                 DEB(printk("SYM53C500: disconnect intr received\n"));
 426                 if (curSC->SCp.phase != message_in) {   /* Unexpected disconnect */
 427                         curSC->result = DID_NO_CONNECT << 16;
 428                 } else {        /* Command complete, return status and message */
 429                         curSC->result = (curSC->SCp.Status & 0xff)
 430                             | ((curSC->SCp.Message & 0xff) << 8) | (DID_OK << 16);
 431                 }
 432                 goto idle_out;
 433         }
 434
 435         switch (status & 0x07) {        /* scsi phase */
 436         case 0x00:                      /* DATA-OUT */
 437                 if (int_reg & 0x10) {   /* Target requesting info transfer */
 438                         curSC->SCp.phase = data_out;
 439                         VDEB(printk("SYM53C500: Data-Out phase\n"));
 440                         outb(FLUSH_FIFO, port_base + CMD_REG);
 441                         LOAD_DMA_COUNT(port_base, curSC->request_bufflen);      /* Max transfer size */
 442                         outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
 443                         if (!curSC->use_sg)     /* Don't use scatter-gather */
 444                                 SYM53C500_pio_write(fast_pio, port_base, curSC->request_buffer, curSC->request_bufflen);
 445                         else {  /* use scatter-gather */
 446                                 sgcount = curSC->use_sg;
 447                                 sglist = curSC->request_buffer;
 448                                 while (sgcount--) {
 449                                         SYM53C500_pio_write(fast_pio, port_base, page_address(sglist->page) + sglist->offset, sglist->length);
 450                                         sglist++;
 451                                 }
 452                         }
 453                         REG0(port_base);
 454                 }
 455                 break;
 456
 457         case 0x01:              /* DATA-IN */
 458                 if (int_reg & 0x10) {   /* Target requesting info transfer */
 459                         curSC->SCp.phase = data_in;
 460                         VDEB(printk("SYM53C500: Data-In phase\n"));
 461                         outb(FLUSH_FIFO, port_base + CMD_REG);
 462                         LOAD_DMA_COUNT(port_base, curSC->request_bufflen);      /* Max transfer size */
 463                         outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
 464                         if (!curSC->use_sg)     /* Don't use scatter-gather */
 465                                 SYM53C500_pio_read(fast_pio, port_base, curSC->request_buffer, curSC->request_bufflen);
 466                         else {  /* Use scatter-gather */
 467                                 sgcount = curSC->use_sg;
 468                                 sglist = curSC->request_buffer;
 469                                 while (sgcount--) {
 470                                         SYM53C500_pio_read(fast_pio, port_base, page_address(sglist->page) + sglist->offset, sglist->length);
 471                                         sglist++;
 472                                 }
 473                         }
 474                         REG0(port_base);
 475                 }
 476                 break;
 477
 478         case 0x02:              /* COMMAND */
 479                 curSC->SCp.phase = command_ph;
 480                 printk("SYM53C500: Warning: Unknown interrupt occurred in command phase!\n");
 481                 break;
 482
 483         case 0x03:              /* STATUS */
 484                 curSC->SCp.phase = status_ph;
 485                 VDEB(printk("SYM53C500: Status phase\n"));
 486                 outb(FLUSH_FIFO, port_base + CMD_REG);
 487                 outb(INIT_CMD_COMPLETE, port_base + CMD_REG);
 488                 break;
 489
 490         case 0x04:              /* Reserved */
 491         case 0x05:              /* Reserved */
 492                 printk("SYM53C500: WARNING: Reserved phase!!!\n");
 493                 break;
 494
 495         case 0x06:              /* MESSAGE-OUT */
 496                 DEB(printk("SYM53C500: Message-Out phase\n"));
 497                 curSC->SCp.phase = message_out;
 498                 outb(SET_ATN, port_base + CMD_REG);     /* Reject the message */
 499                 outb(MSG_ACCEPT, port_base + CMD_REG);
 500                 break;
 501
 502         case 0x07:              /* MESSAGE-IN */
 503                 VDEB(printk("SYM53C500: Message-In phase\n"));
 504                 curSC->SCp.phase = message_in;
 505
 506                 curSC->SCp.Status = inb(port_base + SCSI_FIFO);
 507                 curSC->SCp.Message = inb(port_base + SCSI_FIFO);
 508
 509                 VDEB(printk("SCSI FIFO size=%d\n", inb(port_base + FIFO_FLAGS) & 0x1f));
 510                 DEB(printk("Status = %02x  Message = %02x\n", curSC->SCp.Status, curSC->SCp.Message));
 511
 512                 if (curSC->SCp.Message == SAVE_POINTERS || curSC->SCp.Message == DISCONNECT) {
 513                         outb(SET_ATN, port_base + CMD_REG);     /* Reject message */
 514                         DEB(printk("Discarding SAVE_POINTERS message\n"));
 515                 }
 516                 outb(MSG_ACCEPT, port_base + CMD_REG);
 517                 break;
 518         }
 519 out:
 520         spin_unlock_irqrestore(dev->host_lock, flags);
 521         return IRQ_HANDLED;
 522
 523 idle_out:
 524         curSC->SCp.phase = idle;
 525         curSC->scsi_done(curSC);
 526         goto out;
 527 }
 528
 529 static void
 530 SYM53C500_release(struct pcmcia_device *link)
 531 {
 532         struct scsi_info_t *info = link->priv;
 533         struct Scsi_Host *shost = info->host;
 534
 535         DEBUG(0, "SYM53C500_release(0x%p)\n", link);
 536
 537         /*
 538         *  Do this before releasing/freeing resources.
 539         */
 540         scsi_remove_host(shost);
 541
 542         /*
 543         *  Interrupts getting hosed on card removal.  Try
 544         *  the following code, mostly from qlogicfas.c.
 545         */
 546         if (shost->irq)
 547                 free_irq(shost->irq, shost);
 548         if (shost->io_port && shost->n_io_port)
 549                 release_region(shost->io_port, shost->n_io_port);
 550
 551         pcmcia_disable_device(link);
 552
 553         scsi_host_put(shost);
 554 } /* SYM53C500_release */
 555
 556 static const char*
 557 SYM53C500_info(struct Scsi_Host *SChost)
 558 {
 559         static char info_msg[256];
 560         struct sym53c500_data *data =
 561             (struct sym53c500_data *)SChost->hostdata;
 562
 563         DEB(printk("SYM53C500_info called\n"));
 564         (void)snprintf(info_msg, sizeof(info_msg),
 565             "SYM53C500 at 0x%lx, IRQ %d, %s PIO mode.",
 566             SChost->io_port, SChost->irq, data->fast_pio ? "fast" : "slow");
 567         return (info_msg);
 568 }
 569
 570 static int
 571 SYM53C500_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
 572 {
 573         int i;
 574         int port_base = SCpnt->device->host->io_port;
 575         struct sym53c500_data *data =
 576             (struct sym53c500_data *)SCpnt->device->host->hostdata;
 577
 578         VDEB(printk("SYM53C500_queue called\n"));
 579
 580         DEB(printk("cmd=%02x, cmd_len=%02x, target=%02x, lun=%02x, bufflen=%d\n",
 581             SCpnt->cmnd[0], SCpnt->cmd_len, SCpnt->device->id,
 582             SCpnt->device->lun,  SCpnt->request_bufflen));
 583
 584         VDEB(for (i = 0; i < SCpnt->cmd_len; i++)
 585             printk("cmd[%d]=%02x  ", i, SCpnt->cmnd[i]));
 586         VDEB(printk("\n"));
 587
 588         data->current_SC = SCpnt;
 589         data->current_SC->scsi_done = done;
 590         data->current_SC->SCp.phase = command_ph;
 591         data->current_SC->SCp.Status = 0;
 592         data->current_SC->SCp.Message = 0;
 593
 594         /* We are locked here already by the mid layer */
 595         REG0(port_base);
 596         outb(scmd_id(SCpnt), port_base + DEST_ID);      /* set destination */
 597         outb(FLUSH_FIFO, port_base + CMD_REG);  /* reset the fifos */
 598
 599         for (i = 0; i < SCpnt->cmd_len; i++) {
 600                 outb(SCpnt->cmnd[i], port_base + SCSI_FIFO);
 601         }
 602         outb(SELECT_NO_ATN, port_base + CMD_REG);
 603
 604         return 0;
 605 }
 606
 607 static int
 608 SYM53C500_host_reset(struct scsi_cmnd *SCpnt)
 609 {
 610         int port_base = SCpnt->device->host->io_port;
 611
 612         DEB(printk("SYM53C500_host_reset called\n"));
 613         spin_lock_irq(SCpnt->device->host->host_lock);
 614         SYM53C500_int_host_reset(port_base);
 615         spin_unlock_irq(SCpnt->device->host->host_lock);
 616
 617         return SUCCESS;
 618 }
 619
 620 static int
 621 SYM53C500_biosparm(struct scsi_device *disk,
 622     struct block_device *dev,
 623     sector_t capacity, int *info_array)
 624 {
 625         int size;
 626
 627         DEB(printk("SYM53C500_biosparm called\n"));
 628
 629         size = capacity;
 630         info_array[0] = 64;             /* heads */
 631         info_array[1] = 32;             /* sectors */
 632         info_array[2] = size >> 11;     /* cylinders */
 633         if (info_array[2] > 1024) {     /* big disk */
 634                 info_array[0] = 255;
 635                 info_array[1] = 63;
 636                 info_array[2] = size / (255 * 63);
 637         }
 638         return 0;
 639 }
 640
 641 static ssize_t
 642 SYM53C500_show_pio(struct class_device *cdev, char *buf)
 643 {
 644         struct Scsi_Host *SHp = class_to_shost(cdev);
 645         struct sym53c500_data *data =
 646             (struct sym53c500_data *)SHp->hostdata;
 647
 648         return snprintf(buf, 4, "%d\n", data->fast_pio);
 649 }
 650
 651 static ssize_t
 652 SYM53C500_store_pio(struct class_device *cdev, const char *buf, size_t count)
 653 {
 654         int pio;
 655         struct Scsi_Host *SHp = class_to_shost(cdev);
 656         struct sym53c500_data *data =
 657             (struct sym53c500_data *)SHp->hostdata;
 658
 659         pio = simple_strtoul(buf, NULL, 0);
 660         if (pio == 0 || pio == 1) {
 661                 data->fast_pio = pio;
 662                 return count;
 663         }
 664         else
 665                 return -EINVAL;
 666 }
 667
 668 /*
 669 *  SCSI HBA device attributes we want to
 670 *  make available via sysfs.
 671 */
 672 static struct class_device_attribute SYM53C500_pio_attr = {
 673         .attr = {
 674                 .name = "fast_pio",
 675                 .mode = (S_IRUGO | S_IWUSR),
 676         },
 677         .show = SYM53C500_show_pio,
 678         .store = SYM53C500_store_pio,
 679 };
 680
 681 static struct class_device_attribute *SYM53C500_shost_attrs[] = {
 682         &SYM53C500_pio_attr,
 683         NULL,
 684 };
 685
 686 /*
 687 *  scsi_host_template initializer
 688 */
 689 static struct scsi_host_template sym53c500_driver_template = {
 690      .module                    = THIS_MODULE,
 691      .name                      = "SYM53C500",
 692      .info                      = SYM53C500_info,
 693      .queuecommand              = SYM53C500_queue,
 694      .eh_host_reset_handler     = SYM53C500_host_reset,
 695      .bios_param                = SYM53C500_biosparm,
 696      .proc_name                 = "SYM53C500",
 697      .can_queue                 = 1,
 698      .this_id                   = 7,
 699      .sg_tablesize              = 32,
 700      .cmd_per_lun               = 1,
 701      .use_clustering            = ENABLE_CLUSTERING,
 702      .shost_attrs               = SYM53C500_shost_attrs
 703 };
 704
 705 #define CS_CHECK(fn, ret) \
 706 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 707
 708 static int
 709 SYM53C500_config(struct pcmcia_device *link)
 710 {
 711         struct scsi_info_t *info = link->priv;
 712         tuple_t tuple;
 713         cisparse_t parse;
 714         int i, last_ret, last_fn;
 715         int irq_level, port_base;
 716         unsigned short tuple_data[32];
 717         struct Scsi_Host *host;
 718         struct scsi_host_template *tpnt = &sym53c500_driver_template;
 719         struct sym53c500_data *data;
 720
 721         DEBUG(0, "SYM53C500_config(0x%p)\n", link);
 722
 723         info->manf_id = link->manf_id;
 724
 725         tuple.TupleData = (cisdata_t *)tuple_data;
 726         tuple.TupleDataMax = 64;
 727         tuple.TupleOffset = 0;
 728
 729         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 730         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
 731         while (1) {
 732                 if (pcmcia_get_tuple_data(link, &tuple) != 0 ||
 733                     pcmcia_parse_tuple(link, &tuple, &parse) != 0)
 734                         goto next_entry;
 735                 link->conf.ConfigIndex = parse.cftable_entry.index;
 736                 link->io.BasePort1 = parse.cftable_entry.io.win[0].base;
 737                 link->io.NumPorts1 = parse.cftable_entry.io.win[0].len;
 738
 739                 if (link->io.BasePort1 != 0) {
 740                         i = pcmcia_request_io(link, &link->io);
 741                         if (i == CS_SUCCESS)
 742                                 break;
 743                 }
 744 next_entry:
 745                 CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(link, &tuple));
 746         }
 747
 748         CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
 749         CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
 750
 751         /*
 752         *  That's the trouble with copying liberally from another driver.
 753         *  Some things probably aren't relevant, and I suspect this entire
 754         *  section dealing with manufacturer IDs can be scrapped.       --rct
 755         */
 756         if ((info->manf_id == MANFID_MACNICA) ||
 757             (info->manf_id == MANFID_PIONEER) ||
 758             (info->manf_id == 0x0098)) {
 759                 /* set ATAcmd */
 760                 outb(0xb4, link->io.BasePort1 + 0xd);
 761                 outb(0x24, link->io.BasePort1 + 0x9);
 762                 outb(0x04, link->io.BasePort1 + 0xd);
 763         }
 764
 765         /*
 766         *  irq_level == 0 implies tpnt->can_queue == 0, which
 767         *  is not supported in 2.6.  Thus, only irq_level > 0
 768         *  will be allowed.
 769         *
 770         *  Possible port_base values are as follows:
 771         *
 772         *       0x130, 0x230, 0x280, 0x290,
 773         *       0x320, 0x330, 0x340, 0x350
 774         */
 775         port_base = link->io.BasePort1;
 776         irq_level = link->irq.AssignedIRQ;
 777
 778         DEB(printk("SYM53C500: port_base=0x%x, irq=%d, fast_pio=%d\n",
 779             port_base, irq_level, USE_FAST_PIO);)
 780
 781         chip_init(port_base);
 782
 783         host = scsi_host_alloc(tpnt, sizeof(struct sym53c500_data));
 784         if (!host) {
 785                 printk("SYM53C500: Unable to register host, giving up.\n");
 786                 goto err_release;
 787         }
 788
 789         data = (struct sym53c500_data *)host->hostdata;
 790
 791         if (irq_level > 0) {
 792                 if (request_irq(irq_level, SYM53C500_intr, IRQF_SHARED, "SYM53C500", host)) {
 793                         printk("SYM53C500: unable to allocate IRQ %d\n", irq_level);
 794                         goto err_free_scsi;
 795                 }
 796                 DEB(printk("SYM53C500: allocated IRQ %d\n", irq_level));
 797         } else if (irq_level == 0) {
 798                 DEB(printk("SYM53C500: No interrupts detected\n"));
 799                 goto err_free_scsi;
 800         } else {
 801                 DEB(printk("SYM53C500: Shouldn't get here!\n"));
 802                 goto err_free_scsi;
 803         }
 804
 805         host->unique_id = port_base;
 806         host->irq = irq_level;
 807         host->io_port = port_base;
 808         host->n_io_port = 0x10;
 809         host->dma_channel = -1;
 810
 811         /*
 812         *  Note fast_pio is set to USE_FAST_PIO by
 813         *  default, but can be changed via "sysfs".
 814         */
 815         data->fast_pio = USE_FAST_PIO;
 816
 817         sprintf(info->node.dev_name, "scsi%d", host->host_no);
 818         link->dev_node = &info->node;
 819         info->host = host;
 820
 821         if (scsi_add_host(host, NULL))
 822                 goto err_free_irq;
 823
 824         scsi_scan_host(host);
 825
 826         return 0;
 827
 828 err_free_irq:
 829         free_irq(irq_level, host);
 830 err_free_scsi:
 831         scsi_host_put(host);
 832 err_release:
 833         release_region(port_base, 0x10);
 834         printk(KERN_INFO "sym53c500_cs: no SCSI devices found\n");
 835         return -ENODEV;
 836
 837 cs_failed:
 838         cs_error(link, last_fn, last_ret);
 839         SYM53C500_release(link);
 840         return -ENODEV;
 841 } /* SYM53C500_config */
 842
 843 static int sym53c500_resume(struct pcmcia_device *link)
 844 {
 845         struct scsi_info_t *info = link->priv;
 846
 847         /* See earlier comment about manufacturer IDs. */
 848         if ((info->manf_id == MANFID_MACNICA) ||
 849             (info->manf_id == MANFID_PIONEER) ||
 850             (info->manf_id == 0x0098)) {
 851                 outb(0x80, link->io.BasePort1 + 0xd);
 852                 outb(0x24, link->io.BasePort1 + 0x9);
 853                 outb(0x04, link->io.BasePort1 + 0xd);
 854         }
 855         /*
 856          *  If things don't work after a "resume",
 857          *  this is a good place to start looking.
 858          */
 859         SYM53C500_int_host_reset(link->io.BasePort1);
 860
 861         return 0;
 862 }
 863
 864 static void
 865 SYM53C500_detach(struct pcmcia_device *link)
 866 {
 867         DEBUG(0, "SYM53C500_detach(0x%p)\n", link);
 868
 869         SYM53C500_release(link);
 870
 871         kfree(link->priv);
 872         link->priv = NULL;
 873 } /* SYM53C500_detach */
 874
 875 static int
 876 SYM53C500_probe(struct pcmcia_device *link)
 877 {
 878         struct scsi_info_t *info;
 879
 880         DEBUG(0, "SYM53C500_attach()\n");
 881
 882         /* Create new SCSI device */
 883         info = kmalloc(sizeof(*info), GFP_KERNEL);
 884         if (!info)
 885                 return -ENOMEM;
 886         memset(info, 0, sizeof(*info));
 887         info->p_dev = link;
 888         link->priv = info;
 889         link->io.NumPorts1 = 16;
 890         link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 891         link->io.IOAddrLines = 10;
 892         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 893         link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 894         link->conf.Attributes = CONF_ENABLE_IRQ;
 895         link->conf.IntType = INT_MEMORY_AND_IO;
 896
 897         return SYM53C500_config(link);
 898 } /* SYM53C500_attach */
 899
 900 MODULE_AUTHOR("Bob Tracy <rct@frus.com>");
 901 MODULE_DESCRIPTION("SYM53C500 PCMCIA SCSI driver");
 902 MODULE_LICENSE("GPL");
 903
 904 static struct pcmcia_device_id sym53c500_ids[] = {
 905         PCMCIA_DEVICE_PROD_ID12("BASICS by New Media Corporation", "SCSI Sym53C500", 0x23c78a9d, 0x0099e7f7),
 906         PCMCIA_DEVICE_PROD_ID12("New Media Corporation", "SCSI Bus Toaster Sym53C500", 0x085a850b, 0x45432eb8),
 907         PCMCIA_DEVICE_PROD_ID2("SCSI9000", 0x21648f44),
 908         PCMCIA_DEVICE_NULL,
 909 };
 910 MODULE_DEVICE_TABLE(pcmcia, sym53c500_ids);
 911
 912 static struct pcmcia_driver sym53c500_cs_driver = {
 913         .owner          = THIS_MODULE,
 914         .drv            = {
 915                 .name   = "sym53c500_cs",
 916         },
 917         .probe          = SYM53C500_probe,
 918         .remove         = SYM53C500_detach,
 919         .id_table       = sym53c500_ids,
 920         .resume         = sym53c500_resume,
 921 };
 922
 923 static int __init
 924 init_sym53c500_cs(void)
 925 {
 926         return pcmcia_register_driver(&sym53c500_cs_driver);
 927 }
 928
 929 static void __exit
 930 exit_sym53c500_cs(void)
 931 {
 932         pcmcia_unregister_driver(&sym53c500_cs_driver);
 933 }
 934
 935 module_init(init_sym53c500_cs);
 936 module_exit(exit_sym53c500_cs);