LXR linux/drivers/scsi/pcmcia/sym53c500

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3*  sym53c500_cs.c       Bob Tracy (rct@frus.com)
   4*
   5*  A rewrite of the pcmcia-cs add-on driver for newer (circa 1997)
   6*  New Media Bus Toaster PCMCIA SCSI cards using the Symbios Logic
   7*  53c500 controller: intended for use with 2.6 and later kernels.
   8*  The pcmcia-cs add-on version of this driver is not supported
   9*  beyond 2.4.  It consisted of three files with history/copyright
  10*  information as follows:
  11*
  12*  SYM53C500.h
  13*       Bob Tracy (rct@frus.com)
  14*       Original by Tom Corner (tcorner@via.at).
  15*       Adapted from NCR53c406a.h which is Copyrighted (C) 1994
  16*       Normunds Saumanis (normunds@rx.tech.swh.lv)
  17*
  18*  SYM53C500.c
  19*       Bob Tracy (rct@frus.com)
  20*       Original driver by Tom Corner (tcorner@via.at) was adapted
  21*       from NCR53c406a.c which is Copyrighted (C) 1994, 1995, 1996 
  22*       Normunds Saumanis (normunds@fi.ibm.com)
  23*
  24*  sym53c500.c
  25*       Bob Tracy (rct@frus.com)
  26*       Original by Tom Corner (tcorner@via.at) was adapted from a
  27*       driver for the Qlogic SCSI card written by
  28*       David Hinds (dhinds@allegro.stanford.edu).
  29*/
  30
  31#define SYM53C500_DEBUG 0
  32#define VERBOSE_SYM53C500_DEBUG 0
  33
  34/*
  35*  Set this to 0 if you encounter kernel lockups while transferring 
  36*  data in PIO mode.  Note this can be changed via "sysfs".
  37*/
  38#define USE_FAST_PIO 1
  39
  40/* =============== End of user configurable parameters ============== */
  41
  42#include <linux/module.h>
  43#include <linux/moduleparam.h>
  44#include <linux/errno.h>
  45#include <linux/init.h>
  46#include <linux/interrupt.h>
  47#include <linux/kernel.h>
  48#include <linux/slab.h>
  49#include <linux/string.h>
  50#include <linux/ioport.h>
  51#include <linux/blkdev.h>
  52#include <linux/spinlock.h>
  53#include <linux/bitops.h>
  54
  55#include <asm/io.h>
  56#include <asm/dma.h>
  57#include <asm/irq.h>
  58
  59#include <scsi/scsi_ioctl.h>
  60#include <scsi/scsi_cmnd.h>
  61#include <scsi/scsi_device.h>
  62#include <scsi/scsi.h>
  63#include <scsi/scsi_host.h>
  64
  65#include <pcmcia/cistpl.h>
  66#include <pcmcia/ds.h>
  67#include <pcmcia/ciscode.h>
  68
  69
  70/* ================================================================== */
  71
  72#define SYNC_MODE 0             /* Synchronous transfer mode */
  73
  74/* Default configuration */
  75#define C1_IMG   0x07           /* ID=7 */
  76#define C2_IMG   0x48           /* FE SCSI2 */
  77#define C3_IMG   0x20           /* CDB */
  78#define C4_IMG   0x04           /* ANE */
  79#define C5_IMG   0xa4           /* ? changed from b6= AA PI SIE POL */
  80#define C7_IMG   0x80           /* added for SYM53C500 t. corner */
  81
  82/* Hardware Registers: offsets from io_port (base) */
  83
  84/* Control Register Set 0 */
  85#define TC_LSB          0x00            /* transfer counter lsb */
  86#define TC_MSB          0x01            /* transfer counter msb */
  87#define SCSI_FIFO       0x02            /* scsi fifo register */
  88#define CMD_REG         0x03            /* command register */
  89#define STAT_REG        0x04            /* status register */
  90#define DEST_ID         0x04            /* selection/reselection bus id */
  91#define INT_REG         0x05            /* interrupt status register */
  92#define SRTIMOUT        0x05            /* select/reselect timeout reg */
  93#define SEQ_REG         0x06            /* sequence step register */
  94#define SYNCPRD         0x06            /* synchronous transfer period */
  95#define FIFO_FLAGS      0x07            /* indicates # of bytes in fifo */
  96#define SYNCOFF         0x07            /* synchronous offset register */
  97#define CONFIG1         0x08            /* configuration register */
  98#define CLKCONV         0x09            /* clock conversion register */
  99/* #define TESTREG      0x0A */         /* test mode register */
 100#define CONFIG2         0x0B            /* configuration 2 register */
 101#define CONFIG3         0x0C            /* configuration 3 register */
 102#define CONFIG4         0x0D            /* configuration 4 register */
 103#define TC_HIGH         0x0E            /* transfer counter high */
 104/* #define FIFO_BOTTOM  0x0F */         /* reserve FIFO byte register */
 105
 106/* Control Register Set 1 */
 107/* #define JUMPER_SENSE 0x00 */         /* jumper sense port reg (r/w) */
 108/* #define SRAM_PTR     0x01 */         /* SRAM address pointer reg (r/w) */
 109/* #define SRAM_DATA    0x02 */         /* SRAM data register (r/w) */
 110#define PIO_FIFO        0x04            /* PIO FIFO registers (r/w) */
 111/* #define PIO_FIFO1    0x05 */         /*  */
 112/* #define PIO_FIFO2    0x06 */         /*  */
 113/* #define PIO_FIFO3    0x07 */         /*  */
 114#define PIO_STATUS      0x08            /* PIO status (r/w) */
 115/* #define ATA_CMD      0x09 */         /* ATA command/status reg (r/w) */
 116/* #define ATA_ERR      0x0A */         /* ATA features/error reg (r/w) */
 117#define PIO_FLAG        0x0B            /* PIO flag interrupt enable (r/w) */
 118#define CONFIG5         0x09            /* configuration 5 register */
 119/* #define SIGNATURE    0x0E */         /* signature register (r) */
 120/* #define CONFIG6      0x0F */         /* configuration 6 register (r) */
 121#define CONFIG7         0x0d
 122
 123/* select register set 0 */
 124#define REG0(x)         (outb(C4_IMG, (x) + CONFIG4))
 125/* select register set 1 */
 126#define REG1(x)         outb(C7_IMG, (x) + CONFIG7); outb(C5_IMG, (x) + CONFIG5)
 127
 128#if SYM53C500_DEBUG
 129#define DEB(x) x
 130#else
 131#define DEB(x)
 132#endif
 133
 134#if VERBOSE_SYM53C500_DEBUG
 135#define VDEB(x) x
 136#else
 137#define VDEB(x)
 138#endif
 139
 140#define LOAD_DMA_COUNT(x, count) \
 141  outb(count & 0xff, (x) + TC_LSB); \
 142  outb((count >> 8) & 0xff, (x) + TC_MSB); \
 143  outb((count >> 16) & 0xff, (x) + TC_HIGH);
 144
 145/* Chip commands */
 146#define DMA_OP               0x80
 147
 148#define SCSI_NOP             0x00
 149#define FLUSH_FIFO           0x01
 150#define CHIP_RESET           0x02
 151#define SCSI_RESET           0x03
 152#define RESELECT             0x40
 153#define SELECT_NO_ATN        0x41
 154#define SELECT_ATN           0x42
 155#define SELECT_ATN_STOP      0x43
 156#define ENABLE_SEL           0x44
 157#define DISABLE_SEL          0x45
 158#define SELECT_ATN3          0x46
 159#define RESELECT3            0x47
 160#define TRANSFER_INFO        0x10
 161#define INIT_CMD_COMPLETE    0x11
 162#define MSG_ACCEPT           0x12
 163#define TRANSFER_PAD         0x18
 164#define SET_ATN              0x1a
 165#define RESET_ATN            0x1b
 166#define SEND_MSG             0x20
 167#define SEND_STATUS          0x21
 168#define SEND_DATA            0x22
 169#define DISCONN_SEQ          0x23
 170#define TERMINATE_SEQ        0x24
 171#define TARG_CMD_COMPLETE    0x25
 172#define DISCONN              0x27
 173#define RECV_MSG             0x28
 174#define RECV_CMD             0x29
 175#define RECV_DATA            0x2a
 176#define RECV_CMD_SEQ         0x2b
 177#define TARGET_ABORT_DMA     0x04
 178
 179/* ================================================================== */
 180
 181struct scsi_info_t {
 182        struct pcmcia_device    *p_dev;
 183        struct Scsi_Host *host;
 184        unsigned short manf_id;
 185};
 186
 187/*
 188*  Repository for per-instance host data.
 189*/
 190struct sym53c500_data {
 191        struct scsi_cmnd *current_SC;
 192        int fast_pio;
 193};
 194
 195enum Phase {
 196    idle,
 197    data_out,
 198    data_in,
 199    command_ph,
 200    status_ph,
 201    message_out,
 202    message_in
 203};
 204
 205/* ================================================================== */
 206
 207static void
 208chip_init(int io_port)
 209{
 210        REG1(io_port);
 211        outb(0x01, io_port + PIO_STATUS);
 212        outb(0x00, io_port + PIO_FLAG);
 213
 214        outb(C4_IMG, io_port + CONFIG4);        /* REG0(io_port); */
 215        outb(C3_IMG, io_port + CONFIG3);
 216        outb(C2_IMG, io_port + CONFIG2);
 217        outb(C1_IMG, io_port + CONFIG1);
 218
 219        outb(0x05, io_port + CLKCONV);  /* clock conversion factor */
 220        outb(0x9C, io_port + SRTIMOUT); /* Selection timeout */
 221        outb(0x05, io_port + SYNCPRD);  /* Synchronous transfer period */
 222        outb(SYNC_MODE, io_port + SYNCOFF);     /* synchronous mode */  
 223}
 224
 225static void
 226SYM53C500_int_host_reset(int io_port)
 227{
 228        outb(C4_IMG, io_port + CONFIG4);        /* REG0(io_port); */
 229        outb(CHIP_RESET, io_port + CMD_REG);
 230        outb(SCSI_NOP, io_port + CMD_REG);      /* required after reset */
 231        outb(SCSI_RESET, io_port + CMD_REG);
 232        chip_init(io_port);
 233}
 234
 235static __inline__ int
 236SYM53C500_pio_read(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
 237{
 238        int i;
 239        int len;        /* current scsi fifo size */
 240
 241        REG1(base);
 242        while (reqlen) {
 243                i = inb(base + PIO_STATUS);
 244                /* VDEB(printk("pio_status=%x\n", i)); */
 245                if (i & 0x80) 
 246                        return 0;
 247
 248                switch (i & 0x1e) {
 249                default:
 250                case 0x10:      /* fifo empty */
 251                        len = 0;
 252                        break;
 253                case 0x0:
 254                        len = 1;
 255                        break; 
 256                case 0x8:       /* fifo 1/3 full */
 257                        len = 42;
 258                        break;
 259                case 0xc:       /* fifo 2/3 full */
 260                        len = 84;
 261                        break;
 262                case 0xe:       /* fifo full */
 263                        len = 128;
 264                        break;
 265                }
 266
 267                if ((i & 0x40) && len == 0) { /* fifo empty and interrupt occurred */
 268                        return 0;
 269                }
 270
 271                if (len) {
 272                        if (len > reqlen) 
 273                                len = reqlen;
 274
 275                        if (fast_pio && len > 3) {
 276                                insl(base + PIO_FIFO, request, len >> 2);
 277                                request += len & 0xfc; 
 278                                reqlen -= len & 0xfc; 
 279                        } else {
 280                                while (len--) {
 281                                        *request++ = inb(base + PIO_FIFO);
 282                                        reqlen--;
 283                                }
 284                        } 
 285                }
 286        }
 287        return 0;
 288}
 289
 290static __inline__ int
 291SYM53C500_pio_write(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
 292{
 293        int i = 0;
 294        int len;        /* current scsi fifo size */
 295
 296        REG1(base);
 297        while (reqlen && !(i & 0x40)) {
 298                i = inb(base + PIO_STATUS);
 299                /* VDEB(printk("pio_status=%x\n", i)); */
 300                if (i & 0x80)   /* error */
 301                        return 0;
 302
 303                switch (i & 0x1e) {
 304                case 0x10:
 305                        len = 128;
 306                        break;
 307                case 0x0:
 308                        len = 84;
 309                        break;
 310                case 0x8:
 311                        len = 42;
 312                        break;
 313                case 0xc:
 314                        len = 1;
 315                        break;
 316                default:
 317                case 0xe:
 318                        len = 0;
 319                        break;
 320                }
 321
 322                if (len) {
 323                        if (len > reqlen)
 324                                len = reqlen;
 325
 326                        if (fast_pio && len > 3) {
 327                                outsl(base + PIO_FIFO, request, len >> 2);
 328                                request += len & 0xfc;
 329                                reqlen -= len & 0xfc;
 330                        } else {
 331                                while (len--) {
 332                                        outb(*request++, base + PIO_FIFO);
 333                                        reqlen--;
 334                                }
 335                        }
 336                }
 337        }
 338        return 0;
 339}
 340
 341static irqreturn_t
 342SYM53C500_intr(int irq, void *dev_id)
 343{
 344        unsigned long flags;
 345        struct Scsi_Host *dev = dev_id;
 346        DEB(unsigned char fifo_size;)
 347        DEB(unsigned char seq_reg;)
 348        unsigned char status, int_reg;
 349        unsigned char pio_status;
 350        int port_base = dev->io_port;
 351        struct sym53c500_data *data =
 352            (struct sym53c500_data *)dev->hostdata;
 353        struct scsi_cmnd *curSC = data->current_SC;
 354        int fast_pio = data->fast_pio;
 355
 356        spin_lock_irqsave(dev->host_lock, flags);
 357
 358        VDEB(printk("SYM53C500_intr called\n"));
 359
 360        REG1(port_base);
 361        pio_status = inb(port_base + PIO_STATUS);
 362        REG0(port_base);
 363        status = inb(port_base + STAT_REG);
 364        DEB(seq_reg = inb(port_base + SEQ_REG));
 365        int_reg = inb(port_base + INT_REG);
 366        DEB(fifo_size = inb(port_base + FIFO_FLAGS) & 0x1f);
 367
 368#if SYM53C500_DEBUG
 369        printk("status=%02x, seq_reg=%02x, int_reg=%02x, fifo_size=%02x", 
 370            status, seq_reg, int_reg, fifo_size);
 371        printk(", pio=%02x\n", pio_status);
 372#endif /* SYM53C500_DEBUG */
 373
 374        if (int_reg & 0x80) {   /* SCSI reset intr */
 375                DEB(printk("SYM53C500: reset intr received\n"));
 376                curSC->result = DID_RESET << 16;
 377                goto idle_out;
 378        }
 379
 380        if (pio_status & 0x80) {
 381                printk("SYM53C500: Warning: PIO error!\n");
 382                curSC->result = DID_ERROR << 16;
 383                goto idle_out;
 384        }
 385
 386        if (status & 0x20) {            /* Parity error */
 387                printk("SYM53C500: Warning: parity error!\n");
 388                curSC->result = DID_PARITY << 16;
 389                goto idle_out;
 390        }
 391
 392        if (status & 0x40) {            /* Gross error */
 393                printk("SYM53C500: Warning: gross error!\n");
 394                curSC->result = DID_ERROR << 16;
 395                goto idle_out;
 396        }
 397
 398        if (int_reg & 0x20) {           /* Disconnect */
 399                DEB(printk("SYM53C500: disconnect intr received\n"));
 400                if (curSC->SCp.phase != message_in) {   /* Unexpected disconnect */
 401                        curSC->result = DID_NO_CONNECT << 16;
 402                } else {        /* Command complete, return status and message */
 403                        curSC->result = (curSC->SCp.Status & 0xff)
 404                            | ((curSC->SCp.Message & 0xff) << 8) | (DID_OK << 16);
 405                }
 406                goto idle_out;
 407        }
 408
 409        switch (status & 0x07) {        /* scsi phase */
 410        case 0x00:                      /* DATA-OUT */
 411                if (int_reg & 0x10) {   /* Target requesting info transfer */
 412                        struct scatterlist *sg;
 413                        int i;
 414
 415                        curSC->SCp.phase = data_out;
 416                        VDEB(printk("SYM53C500: Data-Out phase\n"));
 417                        outb(FLUSH_FIFO, port_base + CMD_REG);
 418                        LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
 419                        outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
 420
 421                        scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
 422                                SYM53C500_pio_write(fast_pio, port_base,
 423                                    sg_virt(sg), sg->length);
 424                        }
 425                        REG0(port_base);
 426                }
 427                break;
 428
 429        case 0x01:              /* DATA-IN */
 430                if (int_reg & 0x10) {   /* Target requesting info transfer */
 431                        struct scatterlist *sg;
 432                        int i;
 433
 434                        curSC->SCp.phase = data_in;
 435                        VDEB(printk("SYM53C500: Data-In phase\n"));
 436                        outb(FLUSH_FIFO, port_base + CMD_REG);
 437                        LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
 438                        outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
 439
 440                        scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
 441                                SYM53C500_pio_read(fast_pio, port_base,
 442                                        sg_virt(sg), sg->length);
 443                        }
 444                        REG0(port_base);
 445                }
 446                break;
 447
 448        case 0x02:              /* COMMAND */
 449                curSC->SCp.phase = command_ph;
 450                printk("SYM53C500: Warning: Unknown interrupt occurred in command phase!\n");
 451                break;
 452
 453        case 0x03:              /* STATUS */
 454                curSC->SCp.phase = status_ph;
 455                VDEB(printk("SYM53C500: Status phase\n"));
 456                outb(FLUSH_FIFO, port_base + CMD_REG);
 457                outb(INIT_CMD_COMPLETE, port_base + CMD_REG);
 458                break;
 459
 460        case 0x04:              /* Reserved */
 461        case 0x05:              /* Reserved */
 462                printk("SYM53C500: WARNING: Reserved phase!!!\n");
 463                break;
 464
 465        case 0x06:              /* MESSAGE-OUT */
 466                DEB(printk("SYM53C500: Message-Out phase\n"));
 467                curSC->SCp.phase = message_out;
 468                outb(SET_ATN, port_base + CMD_REG);     /* Reject the message */
 469                outb(MSG_ACCEPT, port_base + CMD_REG);
 470                break;
 471
 472        case 0x07:              /* MESSAGE-IN */
 473                VDEB(printk("SYM53C500: Message-In phase\n"));
 474                curSC->SCp.phase = message_in;
 475
 476                curSC->SCp.Status = inb(port_base + SCSI_FIFO);
 477                curSC->SCp.Message = inb(port_base + SCSI_FIFO);
 478
 479                VDEB(printk("SCSI FIFO size=%d\n", inb(port_base + FIFO_FLAGS) & 0x1f));
 480                DEB(printk("Status = %02x  Message = %02x\n", curSC->SCp.Status, curSC->SCp.Message));
 481
 482                if (curSC->SCp.Message == SAVE_POINTERS || curSC->SCp.Message == DISCONNECT) {
 483                        outb(SET_ATN, port_base + CMD_REG);     /* Reject message */
 484                        DEB(printk("Discarding SAVE_POINTERS message\n"));
 485                }
 486                outb(MSG_ACCEPT, port_base + CMD_REG);
 487                break;
 488        }
 489out:
 490        spin_unlock_irqrestore(dev->host_lock, flags);
 491        return IRQ_HANDLED;
 492
 493idle_out:
 494        curSC->SCp.phase = idle;
 495        curSC->scsi_done(curSC);
 496        goto out;
 497}
 498
 499static void
 500SYM53C500_release(struct pcmcia_device *link)
 501{
 502        struct scsi_info_t *info = link->priv;
 503        struct Scsi_Host *shost = info->host;
 504
 505        dev_dbg(&link->dev, "SYM53C500_release\n");
 506
 507        /*
 508        *  Do this before releasing/freeing resources.
 509        */
 510        scsi_remove_host(shost);
 511
 512        /*
 513        *  Interrupts getting hosed on card removal.  Try
 514        *  the following code, mostly from qlogicfas.c.
 515        */
 516        if (shost->irq)
 517                free_irq(shost->irq, shost);
 518        if (shost->io_port && shost->n_io_port)
 519                release_region(shost->io_port, shost->n_io_port);
 520
 521        pcmcia_disable_device(link);
 522
 523        scsi_host_put(shost);
 524} /* SYM53C500_release */
 525
 526static const char*
 527SYM53C500_info(struct Scsi_Host *SChost)
 528{
 529        static char info_msg[256];
 530        struct sym53c500_data *data =
 531            (struct sym53c500_data *)SChost->hostdata;
 532
 533        DEB(printk("SYM53C500_info called\n"));
 534        (void)snprintf(info_msg, sizeof(info_msg),
 535            "SYM53C500 at 0x%lx, IRQ %d, %s PIO mode.", 
 536            SChost->io_port, SChost->irq, data->fast_pio ? "fast" : "slow");
 537        return (info_msg);
 538}
 539
 540static int 
 541SYM53C500_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
 542{
 543        int i;
 544        int port_base = SCpnt->device->host->io_port;
 545        struct sym53c500_data *data =
 546            (struct sym53c500_data *)SCpnt->device->host->hostdata;
 547
 548        VDEB(printk("SYM53C500_queue called\n"));
 549
 550        DEB(printk("cmd=%02x, cmd_len=%02x, target=%02x, lun=%02x, bufflen=%d\n", 
 551            SCpnt->cmnd[0], SCpnt->cmd_len, SCpnt->device->id, 
 552                   (u8)SCpnt->device->lun,  scsi_bufflen(SCpnt)));
 553
 554        VDEB(for (i = 0; i < SCpnt->cmd_len; i++)
 555            printk("cmd[%d]=%02x  ", i, SCpnt->cmnd[i]));
 556        VDEB(printk("\n"));
 557
 558        data->current_SC = SCpnt;
 559        data->current_SC->scsi_done = done;
 560        data->current_SC->SCp.phase = command_ph;
 561        data->current_SC->SCp.Status = 0;
 562        data->current_SC->SCp.Message = 0;
 563
 564        /* We are locked here already by the mid layer */
 565        REG0(port_base);
 566        outb(scmd_id(SCpnt), port_base + DEST_ID);      /* set destination */
 567        outb(FLUSH_FIFO, port_base + CMD_REG);  /* reset the fifos */
 568
 569        for (i = 0; i < SCpnt->cmd_len; i++) {
 570                outb(SCpnt->cmnd[i], port_base + SCSI_FIFO);
 571        }
 572        outb(SELECT_NO_ATN, port_base + CMD_REG);
 573
 574        return 0;
 575}
 576
 577static DEF_SCSI_QCMD(SYM53C500_queue)
 578
 579static int 
 580SYM53C500_host_reset(struct scsi_cmnd *SCpnt)
 581{
 582        int port_base = SCpnt->device->host->io_port;
 583
 584        DEB(printk("SYM53C500_host_reset called\n"));
 585        spin_lock_irq(SCpnt->device->host->host_lock);
 586        SYM53C500_int_host_reset(port_base);
 587        spin_unlock_irq(SCpnt->device->host->host_lock);
 588
 589        return SUCCESS;
 590}
 591
 592static int 
 593SYM53C500_biosparm(struct scsi_device *disk,
 594    struct block_device *dev,
 595    sector_t capacity, int *info_array)
 596{
 597        int size;
 598
 599        DEB(printk("SYM53C500_biosparm called\n"));
 600
 601        size = capacity;
 602        info_array[0] = 64;             /* heads */
 603        info_array[1] = 32;             /* sectors */
 604        info_array[2] = size >> 11;     /* cylinders */
 605        if (info_array[2] > 1024) {     /* big disk */
 606                info_array[0] = 255;
 607                info_array[1] = 63;
 608                info_array[2] = size / (255 * 63);
 609        }
 610        return 0;
 611}
 612
 613static ssize_t
 614SYM53C500_show_pio(struct device *dev, struct device_attribute *attr,
 615                   char *buf)
 616{
 617        struct Scsi_Host *SHp = class_to_shost(dev);
 618        struct sym53c500_data *data =
 619            (struct sym53c500_data *)SHp->hostdata;
 620
 621        return snprintf(buf, 4, "%d\n", data->fast_pio);
 622}
 623
 624static ssize_t
 625SYM53C500_store_pio(struct device *dev, struct device_attribute *attr,
 626                    const char *buf, size_t count)
 627{
 628        int pio;
 629        struct Scsi_Host *SHp = class_to_shost(dev);
 630        struct sym53c500_data *data =
 631            (struct sym53c500_data *)SHp->hostdata;
 632
 633        pio = simple_strtoul(buf, NULL, 0);
 634        if (pio == 0 || pio == 1) {
 635                data->fast_pio = pio;
 636                return count;
 637        }
 638        else
 639                return -EINVAL;
 640}
 641
 642/*
 643*  SCSI HBA device attributes we want to
 644*  make available via sysfs.
 645*/
 646static struct device_attribute SYM53C500_pio_attr = {
 647        .attr = {
 648                .name = "fast_pio",
 649                .mode = (S_IRUGO | S_IWUSR),
 650        },
 651        .show = SYM53C500_show_pio,
 652        .store = SYM53C500_store_pio,
 653};
 654
 655static struct device_attribute *SYM53C500_shost_attrs[] = {
 656        &SYM53C500_pio_attr,
 657        NULL,
 658};
 659
 660/*
 661*  scsi_host_template initializer
 662*/
 663static struct scsi_host_template sym53c500_driver_template = {
 664     .module                    = THIS_MODULE,
 665     .name                      = "SYM53C500",
 666     .info                      = SYM53C500_info,
 667     .queuecommand              = SYM53C500_queue,
 668     .eh_host_reset_handler     = SYM53C500_host_reset,
 669     .bios_param                = SYM53C500_biosparm,
 670     .proc_name                 = "SYM53C500",
 671     .can_queue                 = 1,
 672     .this_id                   = 7,
 673     .sg_tablesize              = 32,
 674     .shost_attrs               = SYM53C500_shost_attrs
 675};
 676
 677static int SYM53C500_config_check(struct pcmcia_device *p_dev, void *priv_data)
 678{
 679        p_dev->io_lines = 10;
 680        p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
 681        p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
 682
 683        if (p_dev->resource[0]->start == 0)
 684                return -ENODEV;
 685
 686        return pcmcia_request_io(p_dev);
 687}
 688
 689static int
 690SYM53C500_config(struct pcmcia_device *link)
 691{
 692        struct scsi_info_t *info = link->priv;
 693        int ret;
 694        int irq_level, port_base;
 695        struct Scsi_Host *host;
 696        struct scsi_host_template *tpnt = &sym53c500_driver_template;
 697        struct sym53c500_data *data;
 698
 699        dev_dbg(&link->dev, "SYM53C500_config\n");
 700
 701        info->manf_id = link->manf_id;
 702
 703        ret = pcmcia_loop_config(link, SYM53C500_config_check, NULL);
 704        if (ret)
 705                goto failed;
 706
 707        if (!link->irq)
 708                goto failed;
 709
 710        ret = pcmcia_enable_device(link);
 711        if (ret)
 712                goto failed;
 713
 714        /*
 715        *  That's the trouble with copying liberally from another driver.
 716        *  Some things probably aren't relevant, and I suspect this entire
 717        *  section dealing with manufacturer IDs can be scrapped.       --rct
 718        */
 719        if ((info->manf_id == MANFID_MACNICA) ||
 720            (info->manf_id == MANFID_PIONEER) ||
 721            (info->manf_id == 0x0098)) {
 722                /* set ATAcmd */
 723                outb(0xb4, link->resource[0]->start + 0xd);
 724                outb(0x24, link->resource[0]->start + 0x9);
 725                outb(0x04, link->resource[0]->start + 0xd);
 726        }
 727
 728        /*
 729        *  irq_level == 0 implies tpnt->can_queue == 0, which
 730        *  is not supported in 2.6.  Thus, only irq_level > 0
 731        *  will be allowed.
 732        *
 733        *  Possible port_base values are as follows:
 734        *
 735        *       0x130, 0x230, 0x280, 0x290,
 736        *       0x320, 0x330, 0x340, 0x350
 737        */
 738        port_base = link->resource[0]->start;
 739        irq_level = link->irq;
 740
 741        DEB(printk("SYM53C500: port_base=0x%x, irq=%d, fast_pio=%d\n",
 742            port_base, irq_level, USE_FAST_PIO);)
 743
 744        chip_init(port_base);
 745
 746        host = scsi_host_alloc(tpnt, sizeof(struct sym53c500_data));
 747        if (!host) {
 748                printk("SYM53C500: Unable to register host, giving up.\n");
 749                goto err_release;
 750        }
 751
 752        data = (struct sym53c500_data *)host->hostdata;
 753
 754        if (irq_level > 0) {
 755                if (request_irq(irq_level, SYM53C500_intr, IRQF_SHARED, "SYM53C500", host)) {
 756                        printk("SYM53C500: unable to allocate IRQ %d\n", irq_level);
 757                        goto err_free_scsi;
 758                }
 759                DEB(printk("SYM53C500: allocated IRQ %d\n", irq_level));
 760        } else if (irq_level == 0) {
 761                DEB(printk("SYM53C500: No interrupts detected\n"));
 762                goto err_free_scsi;
 763        } else {
 764                DEB(printk("SYM53C500: Shouldn't get here!\n"));
 765                goto err_free_scsi;
 766        }
 767
 768        host->unique_id = port_base;
 769        host->irq = irq_level;
 770        host->io_port = port_base;
 771        host->n_io_port = 0x10;
 772        host->dma_channel = -1;
 773
 774        /*
 775        *  Note fast_pio is set to USE_FAST_PIO by
 776        *  default, but can be changed via "sysfs".
 777        */
 778        data->fast_pio = USE_FAST_PIO;
 779
 780        info->host = host;
 781
 782        if (scsi_add_host(host, NULL))
 783                goto err_free_irq;
 784
 785        scsi_scan_host(host);
 786
 787        return 0;
 788
 789err_free_irq:
 790        free_irq(irq_level, host);
 791err_free_scsi:
 792        scsi_host_put(host);
 793err_release:
 794        release_region(port_base, 0x10);
 795        printk(KERN_INFO "sym53c500_cs: no SCSI devices found\n");
 796        return -ENODEV;
 797
 798failed:
 799        SYM53C500_release(link);
 800        return -ENODEV;
 801} /* SYM53C500_config */
 802
 803static int sym53c500_resume(struct pcmcia_device *link)
 804{
 805        struct scsi_info_t *info = link->priv;
 806
 807        /* See earlier comment about manufacturer IDs. */
 808        if ((info->manf_id == MANFID_MACNICA) ||
 809            (info->manf_id == MANFID_PIONEER) ||
 810            (info->manf_id == 0x0098)) {
 811                outb(0x80, link->resource[0]->start + 0xd);
 812                outb(0x24, link->resource[0]->start + 0x9);
 813                outb(0x04, link->resource[0]->start + 0xd);
 814        }
 815        /*
 816         *  If things don't work after a "resume",
 817         *  this is a good place to start looking.
 818         */
 819        SYM53C500_int_host_reset(link->resource[0]->start);
 820
 821        return 0;
 822}
 823
 824static void
 825SYM53C500_detach(struct pcmcia_device *link)
 826{
 827        dev_dbg(&link->dev, "SYM53C500_detach\n");
 828
 829        SYM53C500_release(link);
 830
 831        kfree(link->priv);
 832        link->priv = NULL;
 833} /* SYM53C500_detach */
 834
 835static int
 836SYM53C500_probe(struct pcmcia_device *link)
 837{
 838        struct scsi_info_t *info;
 839
 840        dev_dbg(&link->dev, "SYM53C500_attach()\n");
 841
 842        /* Create new SCSI device */
 843        info = kzalloc(sizeof(*info), GFP_KERNEL);
 844        if (!info)
 845                return -ENOMEM;
 846        info->p_dev = link;
 847        link->priv = info;
 848        link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
 849
 850        return SYM53C500_config(link);
 851} /* SYM53C500_attach */
 852
 853MODULE_AUTHOR("Bob Tracy <rct@frus.com>");
 854MODULE_DESCRIPTION("SYM53C500 PCMCIA SCSI driver");
 855MODULE_LICENSE("GPL");
 856
 857static const struct pcmcia_device_id sym53c500_ids[] = {
 858        PCMCIA_DEVICE_PROD_ID12("BASICS by New Media Corporation", "SCSI Sym53C500", 0x23c78a9d, 0x0099e7f7),
 859        PCMCIA_DEVICE_PROD_ID12("New Media Corporation", "SCSI Bus Toaster Sym53C500", 0x085a850b, 0x45432eb8),
 860        PCMCIA_DEVICE_PROD_ID2("SCSI9000", 0x21648f44),
 861        PCMCIA_DEVICE_NULL,
 862};
 863MODULE_DEVICE_TABLE(pcmcia, sym53c500_ids);
 864
 865static struct pcmcia_driver sym53c500_cs_driver = {
 866        .owner          = THIS_MODULE,
 867        .name           = "sym53c500_cs",
 868        .probe          = SYM53C500_probe,
 869        .remove         = SYM53C500_detach,
 870        .id_table       = sym53c500_ids,
 871        .resume         = sym53c500_resume,
 872};
 873module_pcmcia_driver(sym53c500_cs_driver);
 874