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