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0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003 *  sym53c500_cs.c   Bob Tracy (rct@frus.com)
0004 *
0005 *  A rewrite of the pcmcia-cs add-on driver for newer (circa 1997)
0006 *  New Media Bus Toaster PCMCIA SCSI cards using the Symbios Logic
0007 *  53c500 controller: intended for use with 2.6 and later kernels.
0008 *  The pcmcia-cs add-on version of this driver is not supported
0009 *  beyond 2.4.  It consisted of three files with history/copyright
0010 *  information as follows:
0011 *
0012 *  SYM53C500.h
0013 *   Bob Tracy (rct@frus.com)
0014 *   Original by Tom Corner (tcorner@via.at).
0015 *   Adapted from NCR53c406a.h which is Copyrighted (C) 1994
0016 *   Normunds Saumanis (normunds@rx.tech.swh.lv)
0017 *
0018 *  SYM53C500.c
0019 *   Bob Tracy (rct@frus.com)
0020 *   Original driver by Tom Corner (tcorner@via.at) was adapted
0021 *   from NCR53c406a.c which is Copyrighted (C) 1994, 1995, 1996 
0022 *   Normunds Saumanis (normunds@fi.ibm.com)
0023 *
0024 *  sym53c500.c
0025 *   Bob Tracy (rct@frus.com)
0026 *   Original by Tom Corner (tcorner@via.at) was adapted from a
0027 *   driver for the Qlogic SCSI card written by
0028 *   David Hinds (dhinds@allegro.stanford.edu).
0029 */
0030 
0031 #define SYM53C500_DEBUG 0
0032 #define VERBOSE_SYM53C500_DEBUG 0
0033 
0034 /*
0035 *  Set this to 0 if you encounter kernel lockups while transferring 
0036 *  data in PIO mode.  Note this can be changed via "sysfs".
0037 */
0038 #define USE_FAST_PIO 1
0039 
0040 /* =============== End of user configurable parameters ============== */
0041 
0042 #include <linux/module.h>
0043 #include <linux/moduleparam.h>
0044 #include <linux/errno.h>
0045 #include <linux/init.h>
0046 #include <linux/interrupt.h>
0047 #include <linux/kernel.h>
0048 #include <linux/slab.h>
0049 #include <linux/string.h>
0050 #include <linux/ioport.h>
0051 #include <linux/blkdev.h>
0052 #include <linux/spinlock.h>
0053 #include <linux/bitops.h>
0054 
0055 #include <asm/io.h>
0056 #include <asm/dma.h>
0057 #include <asm/irq.h>
0058 
0059 #include <scsi/scsi_ioctl.h>
0060 #include <scsi/scsi_cmnd.h>
0061 #include <scsi/scsi_device.h>
0062 #include <scsi/scsi.h>
0063 #include <scsi/scsi_host.h>
0064 
0065 #include <pcmcia/cistpl.h>
0066 #include <pcmcia/ds.h>
0067 #include <pcmcia/ciscode.h>
0068 
0069 
0070 /* ================================================================== */
0071 
0072 #define SYNC_MODE 0         /* Synchronous transfer mode */
0073 
0074 /* Default configuration */
0075 #define C1_IMG   0x07       /* ID=7 */
0076 #define C2_IMG   0x48       /* FE SCSI2 */
0077 #define C3_IMG   0x20       /* CDB */
0078 #define C4_IMG   0x04       /* ANE */
0079 #define C5_IMG   0xa4       /* ? changed from b6= AA PI SIE POL */
0080 #define C7_IMG   0x80       /* added for SYM53C500 t. corner */
0081 
0082 /* Hardware Registers: offsets from io_port (base) */
0083 
0084 /* Control Register Set 0 */
0085 #define TC_LSB      0x00        /* transfer counter lsb */
0086 #define TC_MSB      0x01        /* transfer counter msb */
0087 #define SCSI_FIFO   0x02        /* scsi fifo register */
0088 #define CMD_REG     0x03        /* command register */
0089 #define STAT_REG    0x04        /* status register */
0090 #define DEST_ID     0x04        /* selection/reselection bus id */
0091 #define INT_REG     0x05        /* interrupt status register */
0092 #define SRTIMOUT    0x05        /* select/reselect timeout reg */
0093 #define SEQ_REG     0x06        /* sequence step register */
0094 #define SYNCPRD     0x06        /* synchronous transfer period */
0095 #define FIFO_FLAGS  0x07        /* indicates # of bytes in fifo */
0096 #define SYNCOFF     0x07        /* synchronous offset register */
0097 #define CONFIG1     0x08        /* configuration register */
0098 #define CLKCONV     0x09        /* clock conversion register */
0099 /* #define TESTREG  0x0A */     /* test mode register */
0100 #define CONFIG2     0x0B        /* configuration 2 register */
0101 #define CONFIG3     0x0C        /* configuration 3 register */
0102 #define CONFIG4     0x0D        /* configuration 4 register */
0103 #define TC_HIGH     0x0E        /* transfer counter high */
0104 /* #define FIFO_BOTTOM  0x0F */     /* reserve FIFO byte register */
0105 
0106 /* Control Register Set 1 */
0107 /* #define JUMPER_SENSE 0x00 */     /* jumper sense port reg (r/w) */
0108 /* #define SRAM_PTR 0x01 */     /* SRAM address pointer reg (r/w) */
0109 /* #define SRAM_DATA    0x02 */     /* SRAM data register (r/w) */
0110 #define PIO_FIFO    0x04        /* PIO FIFO registers (r/w) */
0111 /* #define PIO_FIFO1    0x05 */     /*  */
0112 /* #define PIO_FIFO2    0x06 */     /*  */
0113 /* #define PIO_FIFO3    0x07 */     /*  */
0114 #define PIO_STATUS  0x08        /* PIO status (r/w) */
0115 /* #define ATA_CMD  0x09 */     /* ATA command/status reg (r/w) */
0116 /* #define ATA_ERR  0x0A */     /* ATA features/error reg (r/w) */
0117 #define PIO_FLAG    0x0B        /* PIO flag interrupt enable (r/w) */
0118 #define CONFIG5     0x09        /* configuration 5 register */
0119 /* #define SIGNATURE    0x0E */     /* signature register (r) */
0120 /* #define CONFIG6  0x0F */     /* configuration 6 register (r) */
0121 #define CONFIG7     0x0d
0122 
0123 /* select register set 0 */
0124 #define REG0(x)     (outb(C4_IMG, (x) + CONFIG4))
0125 /* select register set 1 */
0126 #define REG1(x)     outb(C7_IMG, (x) + CONFIG7); outb(C5_IMG, (x) + CONFIG5)
0127 
0128 #if SYM53C500_DEBUG
0129 #define DEB(x) x
0130 #else
0131 #define DEB(x)
0132 #endif
0133 
0134 #if VERBOSE_SYM53C500_DEBUG
0135 #define VDEB(x) x
0136 #else
0137 #define VDEB(x)
0138 #endif
0139 
0140 #define LOAD_DMA_COUNT(x, count) \
0141   outb(count & 0xff, (x) + TC_LSB); \
0142   outb((count >> 8) & 0xff, (x) + TC_MSB); \
0143   outb((count >> 16) & 0xff, (x) + TC_HIGH);
0144 
0145 /* Chip commands */
0146 #define DMA_OP               0x80
0147 
0148 #define SCSI_NOP             0x00
0149 #define FLUSH_FIFO           0x01
0150 #define CHIP_RESET           0x02
0151 #define SCSI_RESET           0x03
0152 #define RESELECT             0x40
0153 #define SELECT_NO_ATN        0x41
0154 #define SELECT_ATN           0x42
0155 #define SELECT_ATN_STOP      0x43
0156 #define ENABLE_SEL           0x44
0157 #define DISABLE_SEL          0x45
0158 #define SELECT_ATN3          0x46
0159 #define RESELECT3            0x47
0160 #define TRANSFER_INFO        0x10
0161 #define INIT_CMD_COMPLETE    0x11
0162 #define MSG_ACCEPT           0x12
0163 #define TRANSFER_PAD         0x18
0164 #define SET_ATN              0x1a
0165 #define RESET_ATN            0x1b
0166 #define SEND_MSG             0x20
0167 #define SEND_STATUS          0x21
0168 #define SEND_DATA            0x22
0169 #define DISCONN_SEQ          0x23
0170 #define TERMINATE_SEQ        0x24
0171 #define TARG_CMD_COMPLETE    0x25
0172 #define DISCONN              0x27
0173 #define RECV_MSG             0x28
0174 #define RECV_CMD             0x29
0175 #define RECV_DATA            0x2a
0176 #define RECV_CMD_SEQ         0x2b
0177 #define TARGET_ABORT_DMA     0x04
0178 
0179 /* ================================================================== */
0180 
0181 struct scsi_info_t {
0182     struct pcmcia_device    *p_dev;
0183     struct Scsi_Host *host;
0184     unsigned short manf_id;
0185 };
0186 
0187 /*
0188 *  Repository for per-instance host data.
0189 */
0190 struct sym53c500_data {
0191     struct scsi_cmnd *current_SC;
0192     int fast_pio;
0193 };
0194 
0195 struct sym53c500_cmd_priv {
0196     int status;
0197     int message;
0198     int phase;
0199 };
0200 
0201 enum Phase {
0202     idle,
0203     data_out,
0204     data_in,
0205     command_ph,
0206     status_ph,
0207     message_out,
0208     message_in
0209 };
0210 
0211 /* ================================================================== */
0212 
0213 static void
0214 chip_init(int io_port)
0215 {
0216     REG1(io_port);
0217     outb(0x01, io_port + PIO_STATUS);
0218     outb(0x00, io_port + PIO_FLAG);
0219 
0220     outb(C4_IMG, io_port + CONFIG4);    /* REG0(io_port); */
0221     outb(C3_IMG, io_port + CONFIG3);
0222     outb(C2_IMG, io_port + CONFIG2);
0223     outb(C1_IMG, io_port + CONFIG1);
0224 
0225     outb(0x05, io_port + CLKCONV);  /* clock conversion factor */
0226     outb(0x9C, io_port + SRTIMOUT); /* Selection timeout */
0227     outb(0x05, io_port + SYNCPRD);  /* Synchronous transfer period */
0228     outb(SYNC_MODE, io_port + SYNCOFF); /* synchronous mode */  
0229 }
0230 
0231 static void
0232 SYM53C500_int_host_reset(int io_port)
0233 {
0234     outb(C4_IMG, io_port + CONFIG4);    /* REG0(io_port); */
0235     outb(CHIP_RESET, io_port + CMD_REG);
0236     outb(SCSI_NOP, io_port + CMD_REG);  /* required after reset */
0237     outb(SCSI_RESET, io_port + CMD_REG);
0238     chip_init(io_port);
0239 }
0240 
0241 static __inline__ int
0242 SYM53C500_pio_read(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
0243 {
0244     int i;
0245     int len;    /* current scsi fifo size */
0246 
0247     REG1(base);
0248     while (reqlen) {
0249         i = inb(base + PIO_STATUS);
0250         /* VDEB(printk("pio_status=%x\n", i)); */
0251         if (i & 0x80) 
0252             return 0;
0253 
0254         switch (i & 0x1e) {
0255         default:
0256         case 0x10:  /* fifo empty */
0257             len = 0;
0258             break;
0259         case 0x0:
0260             len = 1;
0261             break; 
0262         case 0x8:   /* fifo 1/3 full */
0263             len = 42;
0264             break;
0265         case 0xc:   /* fifo 2/3 full */
0266             len = 84;
0267             break;
0268         case 0xe:   /* fifo full */
0269             len = 128;
0270             break;
0271         }
0272 
0273         if ((i & 0x40) && len == 0) { /* fifo empty and interrupt occurred */
0274             return 0;
0275         }
0276 
0277         if (len) {
0278             if (len > reqlen) 
0279                 len = reqlen;
0280 
0281             if (fast_pio && len > 3) {
0282                 insl(base + PIO_FIFO, request, len >> 2);
0283                 request += len & 0xfc; 
0284                 reqlen -= len & 0xfc; 
0285             } else {
0286                 while (len--) {
0287                     *request++ = inb(base + PIO_FIFO);
0288                     reqlen--;
0289                 }
0290             } 
0291         }
0292     }
0293     return 0;
0294 }
0295 
0296 static __inline__ int
0297 SYM53C500_pio_write(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
0298 {
0299     int i = 0;
0300     int len;    /* current scsi fifo size */
0301 
0302     REG1(base);
0303     while (reqlen && !(i & 0x40)) {
0304         i = inb(base + PIO_STATUS);
0305         /* VDEB(printk("pio_status=%x\n", i)); */
0306         if (i & 0x80)   /* error */
0307             return 0;
0308 
0309         switch (i & 0x1e) {
0310         case 0x10:
0311             len = 128;
0312             break;
0313         case 0x0:
0314             len = 84;
0315             break;
0316         case 0x8:
0317             len = 42;
0318             break;
0319         case 0xc:
0320             len = 1;
0321             break;
0322         default:
0323         case 0xe:
0324             len = 0;
0325             break;
0326         }
0327 
0328         if (len) {
0329             if (len > reqlen)
0330                 len = reqlen;
0331 
0332             if (fast_pio && len > 3) {
0333                 outsl(base + PIO_FIFO, request, len >> 2);
0334                 request += len & 0xfc;
0335                 reqlen -= len & 0xfc;
0336             } else {
0337                 while (len--) {
0338                     outb(*request++, base + PIO_FIFO);
0339                     reqlen--;
0340                 }
0341             }
0342         }
0343     }
0344     return 0;
0345 }
0346 
0347 static irqreturn_t
0348 SYM53C500_intr(int irq, void *dev_id)
0349 {
0350     unsigned long flags;
0351     struct Scsi_Host *dev = dev_id;
0352     DEB(unsigned char fifo_size;)
0353     DEB(unsigned char seq_reg;)
0354     unsigned char status, int_reg;
0355     unsigned char pio_status;
0356     int port_base = dev->io_port;
0357     struct sym53c500_data *data =
0358         (struct sym53c500_data *)dev->hostdata;
0359     struct scsi_cmnd *curSC = data->current_SC;
0360     struct sym53c500_cmd_priv *scp = scsi_cmd_priv(curSC);
0361     int fast_pio = data->fast_pio;
0362 
0363     spin_lock_irqsave(dev->host_lock, flags);
0364 
0365     VDEB(printk("SYM53C500_intr called\n"));
0366 
0367     REG1(port_base);
0368     pio_status = inb(port_base + PIO_STATUS);
0369     REG0(port_base);
0370     status = inb(port_base + STAT_REG);
0371     DEB(seq_reg = inb(port_base + SEQ_REG));
0372     int_reg = inb(port_base + INT_REG);
0373     DEB(fifo_size = inb(port_base + FIFO_FLAGS) & 0x1f);
0374 
0375 #if SYM53C500_DEBUG
0376     printk("status=%02x, seq_reg=%02x, int_reg=%02x, fifo_size=%02x", 
0377         status, seq_reg, int_reg, fifo_size);
0378     printk(", pio=%02x\n", pio_status);
0379 #endif /* SYM53C500_DEBUG */
0380 
0381     if (int_reg & 0x80) {   /* SCSI reset intr */
0382         DEB(printk("SYM53C500: reset intr received\n"));
0383         curSC->result = DID_RESET << 16;
0384         goto idle_out;
0385     }
0386 
0387     if (pio_status & 0x80) {
0388         printk("SYM53C500: Warning: PIO error!\n");
0389         curSC->result = DID_ERROR << 16;
0390         goto idle_out;
0391     }
0392 
0393     if (status & 0x20) {        /* Parity error */
0394         printk("SYM53C500: Warning: parity error!\n");
0395         curSC->result = DID_PARITY << 16;
0396         goto idle_out;
0397     }
0398 
0399     if (status & 0x40) {        /* Gross error */
0400         printk("SYM53C500: Warning: gross error!\n");
0401         curSC->result = DID_ERROR << 16;
0402         goto idle_out;
0403     }
0404 
0405     if (int_reg & 0x20) {       /* Disconnect */
0406         DEB(printk("SYM53C500: disconnect intr received\n"));
0407         if (scp->phase != message_in) { /* Unexpected disconnect */
0408             curSC->result = DID_NO_CONNECT << 16;
0409         } else {    /* Command complete, return status and message */
0410             curSC->result = (scp->status & 0xff) |
0411                 ((scp->message & 0xff) << 8) | (DID_OK << 16);
0412         }
0413         goto idle_out;
0414     }
0415 
0416     switch (status & 0x07) {    /* scsi phase */
0417     case 0x00:          /* DATA-OUT */
0418         if (int_reg & 0x10) {   /* Target requesting info transfer */
0419             struct scatterlist *sg;
0420             int i;
0421 
0422             scp->phase = data_out;
0423             VDEB(printk("SYM53C500: Data-Out phase\n"));
0424             outb(FLUSH_FIFO, port_base + CMD_REG);
0425             LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
0426             outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
0427 
0428             scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
0429                 SYM53C500_pio_write(fast_pio, port_base,
0430                     sg_virt(sg), sg->length);
0431             }
0432             REG0(port_base);
0433         }
0434         break;
0435 
0436     case 0x01:      /* DATA-IN */
0437         if (int_reg & 0x10) {   /* Target requesting info transfer */
0438             struct scatterlist *sg;
0439             int i;
0440 
0441             scp->phase = data_in;
0442             VDEB(printk("SYM53C500: Data-In phase\n"));
0443             outb(FLUSH_FIFO, port_base + CMD_REG);
0444             LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
0445             outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
0446 
0447             scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
0448                 SYM53C500_pio_read(fast_pio, port_base,
0449                     sg_virt(sg), sg->length);
0450             }
0451             REG0(port_base);
0452         }
0453         break;
0454 
0455     case 0x02:      /* COMMAND */
0456         scp->phase = command_ph;
0457         printk("SYM53C500: Warning: Unknown interrupt occurred in command phase!\n");
0458         break;
0459 
0460     case 0x03:      /* STATUS */
0461         scp->phase = status_ph;
0462         VDEB(printk("SYM53C500: Status phase\n"));
0463         outb(FLUSH_FIFO, port_base + CMD_REG);
0464         outb(INIT_CMD_COMPLETE, port_base + CMD_REG);
0465         break;
0466 
0467     case 0x04:      /* Reserved */
0468     case 0x05:      /* Reserved */
0469         printk("SYM53C500: WARNING: Reserved phase!!!\n");
0470         break;
0471 
0472     case 0x06:      /* MESSAGE-OUT */
0473         DEB(printk("SYM53C500: Message-Out phase\n"));
0474         scp->phase = message_out;
0475         outb(SET_ATN, port_base + CMD_REG); /* Reject the message */
0476         outb(MSG_ACCEPT, port_base + CMD_REG);
0477         break;
0478 
0479     case 0x07:      /* MESSAGE-IN */
0480         VDEB(printk("SYM53C500: Message-In phase\n"));
0481         scp->phase = message_in;
0482 
0483         scp->status = inb(port_base + SCSI_FIFO);
0484         scp->message = inb(port_base + SCSI_FIFO);
0485 
0486         VDEB(printk("SCSI FIFO size=%d\n", inb(port_base + FIFO_FLAGS) & 0x1f));
0487         DEB(printk("Status = %02x  Message = %02x\n", scp->status, scp->message));
0488 
0489         if (scp->message == SAVE_POINTERS || scp->message == DISCONNECT) {
0490             outb(SET_ATN, port_base + CMD_REG); /* Reject message */
0491             DEB(printk("Discarding SAVE_POINTERS message\n"));
0492         }
0493         outb(MSG_ACCEPT, port_base + CMD_REG);
0494         break;
0495     }
0496 out:
0497     spin_unlock_irqrestore(dev->host_lock, flags);
0498     return IRQ_HANDLED;
0499 
0500 idle_out:
0501     scp->phase = idle;
0502     scsi_done(curSC);
0503     goto out;
0504 }
0505 
0506 static void
0507 SYM53C500_release(struct pcmcia_device *link)
0508 {
0509     struct scsi_info_t *info = link->priv;
0510     struct Scsi_Host *shost = info->host;
0511 
0512     dev_dbg(&link->dev, "SYM53C500_release\n");
0513 
0514     /*
0515     *  Do this before releasing/freeing resources.
0516     */
0517     scsi_remove_host(shost);
0518 
0519     /*
0520     *  Interrupts getting hosed on card removal.  Try
0521     *  the following code, mostly from qlogicfas.c.
0522     */
0523     if (shost->irq)
0524         free_irq(shost->irq, shost);
0525     if (shost->io_port && shost->n_io_port)
0526         release_region(shost->io_port, shost->n_io_port);
0527 
0528     pcmcia_disable_device(link);
0529 
0530     scsi_host_put(shost);
0531 } /* SYM53C500_release */
0532 
0533 static const char*
0534 SYM53C500_info(struct Scsi_Host *SChost)
0535 {
0536     static char info_msg[256];
0537     struct sym53c500_data *data =
0538         (struct sym53c500_data *)SChost->hostdata;
0539 
0540     DEB(printk("SYM53C500_info called\n"));
0541     (void)snprintf(info_msg, sizeof(info_msg),
0542         "SYM53C500 at 0x%lx, IRQ %d, %s PIO mode.", 
0543         SChost->io_port, SChost->irq, data->fast_pio ? "fast" : "slow");
0544     return (info_msg);
0545 }
0546 
0547 static int SYM53C500_queue_lck(struct scsi_cmnd *SCpnt)
0548 {
0549     struct sym53c500_cmd_priv *scp = scsi_cmd_priv(SCpnt);
0550     int i;
0551     int port_base = SCpnt->device->host->io_port;
0552     struct sym53c500_data *data =
0553         (struct sym53c500_data *)SCpnt->device->host->hostdata;
0554 
0555     VDEB(printk("SYM53C500_queue called\n"));
0556 
0557     DEB(printk("cmd=%02x, cmd_len=%02x, target=%02x, lun=%02x, bufflen=%d\n", 
0558         SCpnt->cmnd[0], SCpnt->cmd_len, SCpnt->device->id, 
0559            (u8)SCpnt->device->lun,  scsi_bufflen(SCpnt)));
0560 
0561     VDEB(for (i = 0; i < SCpnt->cmd_len; i++)
0562         printk("cmd[%d]=%02x  ", i, SCpnt->cmnd[i]));
0563     VDEB(printk("\n"));
0564 
0565     data->current_SC = SCpnt;
0566     scp->phase = command_ph;
0567     scp->status = 0;
0568     scp->message = 0;
0569 
0570     /* We are locked here already by the mid layer */
0571     REG0(port_base);
0572     outb(scmd_id(SCpnt), port_base + DEST_ID);  /* set destination */
0573     outb(FLUSH_FIFO, port_base + CMD_REG);  /* reset the fifos */
0574 
0575     for (i = 0; i < SCpnt->cmd_len; i++) {
0576         outb(SCpnt->cmnd[i], port_base + SCSI_FIFO);
0577     }
0578     outb(SELECT_NO_ATN, port_base + CMD_REG);
0579 
0580     return 0;
0581 }
0582 
0583 static DEF_SCSI_QCMD(SYM53C500_queue)
0584 
0585 static int 
0586 SYM53C500_host_reset(struct scsi_cmnd *SCpnt)
0587 {
0588     int port_base = SCpnt->device->host->io_port;
0589 
0590     DEB(printk("SYM53C500_host_reset called\n"));
0591     spin_lock_irq(SCpnt->device->host->host_lock);
0592     SYM53C500_int_host_reset(port_base);
0593     spin_unlock_irq(SCpnt->device->host->host_lock);
0594 
0595     return SUCCESS;
0596 }
0597 
0598 static int 
0599 SYM53C500_biosparm(struct scsi_device *disk,
0600     struct block_device *dev,
0601     sector_t capacity, int *info_array)
0602 {
0603     int size;
0604 
0605     DEB(printk("SYM53C500_biosparm called\n"));
0606 
0607     size = capacity;
0608     info_array[0] = 64;     /* heads */
0609     info_array[1] = 32;     /* sectors */
0610     info_array[2] = size >> 11; /* cylinders */
0611     if (info_array[2] > 1024) { /* big disk */
0612         info_array[0] = 255;
0613         info_array[1] = 63;
0614         info_array[2] = size / (255 * 63);
0615     }
0616     return 0;
0617 }
0618 
0619 static ssize_t
0620 SYM53C500_show_pio(struct device *dev, struct device_attribute *attr,
0621            char *buf)
0622 {
0623     struct Scsi_Host *SHp = class_to_shost(dev);
0624     struct sym53c500_data *data =
0625         (struct sym53c500_data *)SHp->hostdata;
0626 
0627     return snprintf(buf, 4, "%d\n", data->fast_pio);
0628 }
0629 
0630 static ssize_t
0631 SYM53C500_store_pio(struct device *dev, struct device_attribute *attr,
0632             const char *buf, size_t count)
0633 {
0634     int pio;
0635     struct Scsi_Host *SHp = class_to_shost(dev);
0636     struct sym53c500_data *data =
0637         (struct sym53c500_data *)SHp->hostdata;
0638 
0639     pio = simple_strtoul(buf, NULL, 0);
0640     if (pio == 0 || pio == 1) {
0641         data->fast_pio = pio;
0642         return count;
0643     }
0644     else
0645         return -EINVAL;
0646 }
0647 
0648 /*
0649 *  SCSI HBA device attributes we want to
0650 *  make available via sysfs.
0651 */
0652 static struct device_attribute SYM53C500_pio_attr = {
0653     .attr = {
0654         .name = "fast_pio",
0655         .mode = (S_IRUGO | S_IWUSR),
0656     },
0657     .show = SYM53C500_show_pio,
0658     .store = SYM53C500_store_pio,
0659 };
0660 
0661 static struct attribute *SYM53C500_shost_attrs[] = {
0662     &SYM53C500_pio_attr.attr,
0663     NULL,
0664 };
0665 
0666 ATTRIBUTE_GROUPS(SYM53C500_shost);
0667 
0668 /*
0669 *  scsi_host_template initializer
0670 */
0671 static struct scsi_host_template sym53c500_driver_template = {
0672      .module            = THIS_MODULE,
0673      .name          = "SYM53C500",
0674      .info          = SYM53C500_info,
0675      .queuecommand      = SYM53C500_queue,
0676      .eh_host_reset_handler = SYM53C500_host_reset,
0677      .bios_param        = SYM53C500_biosparm,
0678      .proc_name         = "SYM53C500",
0679      .can_queue         = 1,
0680      .this_id           = 7,
0681      .sg_tablesize      = 32,
0682      .shost_groups      = SYM53C500_shost_groups,
0683      .cmd_size          = sizeof(struct sym53c500_cmd_priv),
0684 };
0685 
0686 static int SYM53C500_config_check(struct pcmcia_device *p_dev, void *priv_data)
0687 {
0688     p_dev->io_lines = 10;
0689     p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
0690     p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
0691 
0692     if (p_dev->resource[0]->start == 0)
0693         return -ENODEV;
0694 
0695     return pcmcia_request_io(p_dev);
0696 }
0697 
0698 static int
0699 SYM53C500_config(struct pcmcia_device *link)
0700 {
0701     struct scsi_info_t *info = link->priv;
0702     int ret;
0703     int irq_level, port_base;
0704     struct Scsi_Host *host;
0705     struct scsi_host_template *tpnt = &sym53c500_driver_template;
0706     struct sym53c500_data *data;
0707 
0708     dev_dbg(&link->dev, "SYM53C500_config\n");
0709 
0710     info->manf_id = link->manf_id;
0711 
0712     ret = pcmcia_loop_config(link, SYM53C500_config_check, NULL);
0713     if (ret)
0714         goto failed;
0715 
0716     if (!link->irq)
0717         goto failed;
0718 
0719     ret = pcmcia_enable_device(link);
0720     if (ret)
0721         goto failed;
0722 
0723     /*
0724     *  That's the trouble with copying liberally from another driver.
0725     *  Some things probably aren't relevant, and I suspect this entire
0726     *  section dealing with manufacturer IDs can be scrapped.   --rct
0727     */
0728     if ((info->manf_id == MANFID_MACNICA) ||
0729         (info->manf_id == MANFID_PIONEER) ||
0730         (info->manf_id == 0x0098)) {
0731         /* set ATAcmd */
0732         outb(0xb4, link->resource[0]->start + 0xd);
0733         outb(0x24, link->resource[0]->start + 0x9);
0734         outb(0x04, link->resource[0]->start + 0xd);
0735     }
0736 
0737     /*
0738     *  irq_level == 0 implies tpnt->can_queue == 0, which
0739     *  is not supported in 2.6.  Thus, only irq_level > 0
0740     *  will be allowed.
0741     *
0742     *  Possible port_base values are as follows:
0743     *
0744     *   0x130, 0x230, 0x280, 0x290,
0745     *   0x320, 0x330, 0x340, 0x350
0746     */
0747     port_base = link->resource[0]->start;
0748     irq_level = link->irq;
0749 
0750     DEB(printk("SYM53C500: port_base=0x%x, irq=%d, fast_pio=%d\n",
0751         port_base, irq_level, USE_FAST_PIO);)
0752 
0753     chip_init(port_base);
0754 
0755     host = scsi_host_alloc(tpnt, sizeof(struct sym53c500_data));
0756     if (!host) {
0757         printk("SYM53C500: Unable to register host, giving up.\n");
0758         goto err_release;
0759     }
0760 
0761     data = (struct sym53c500_data *)host->hostdata;
0762 
0763     if (irq_level > 0) {
0764         if (request_irq(irq_level, SYM53C500_intr, IRQF_SHARED, "SYM53C500", host)) {
0765             printk("SYM53C500: unable to allocate IRQ %d\n", irq_level);
0766             goto err_free_scsi;
0767         }
0768         DEB(printk("SYM53C500: allocated IRQ %d\n", irq_level));
0769     } else if (irq_level == 0) {
0770         DEB(printk("SYM53C500: No interrupts detected\n"));
0771         goto err_free_scsi;
0772     } else {
0773         DEB(printk("SYM53C500: Shouldn't get here!\n"));
0774         goto err_free_scsi;
0775     }
0776 
0777     host->unique_id = port_base;
0778     host->irq = irq_level;
0779     host->io_port = port_base;
0780     host->n_io_port = 0x10;
0781     host->dma_channel = -1;
0782 
0783     /*
0784     *  Note fast_pio is set to USE_FAST_PIO by
0785     *  default, but can be changed via "sysfs".
0786     */
0787     data->fast_pio = USE_FAST_PIO;
0788 
0789     info->host = host;
0790 
0791     if (scsi_add_host(host, NULL))
0792         goto err_free_irq;
0793 
0794     scsi_scan_host(host);
0795 
0796     return 0;
0797 
0798 err_free_irq:
0799     free_irq(irq_level, host);
0800 err_free_scsi:
0801     scsi_host_put(host);
0802 err_release:
0803     release_region(port_base, 0x10);
0804     printk(KERN_INFO "sym53c500_cs: no SCSI devices found\n");
0805     return -ENODEV;
0806 
0807 failed:
0808     SYM53C500_release(link);
0809     return -ENODEV;
0810 } /* SYM53C500_config */
0811 
0812 static int sym53c500_resume(struct pcmcia_device *link)
0813 {
0814     struct scsi_info_t *info = link->priv;
0815 
0816     /* See earlier comment about manufacturer IDs. */
0817     if ((info->manf_id == MANFID_MACNICA) ||
0818         (info->manf_id == MANFID_PIONEER) ||
0819         (info->manf_id == 0x0098)) {
0820         outb(0x80, link->resource[0]->start + 0xd);
0821         outb(0x24, link->resource[0]->start + 0x9);
0822         outb(0x04, link->resource[0]->start + 0xd);
0823     }
0824     /*
0825      *  If things don't work after a "resume",
0826      *  this is a good place to start looking.
0827      */
0828     SYM53C500_int_host_reset(link->resource[0]->start);
0829 
0830     return 0;
0831 }
0832 
0833 static void
0834 SYM53C500_detach(struct pcmcia_device *link)
0835 {
0836     dev_dbg(&link->dev, "SYM53C500_detach\n");
0837 
0838     SYM53C500_release(link);
0839 
0840     kfree(link->priv);
0841     link->priv = NULL;
0842 } /* SYM53C500_detach */
0843 
0844 static int
0845 SYM53C500_probe(struct pcmcia_device *link)
0846 {
0847     struct scsi_info_t *info;
0848 
0849     dev_dbg(&link->dev, "SYM53C500_attach()\n");
0850 
0851     /* Create new SCSI device */
0852     info = kzalloc(sizeof(*info), GFP_KERNEL);
0853     if (!info)
0854         return -ENOMEM;
0855     info->p_dev = link;
0856     link->priv = info;
0857     link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
0858 
0859     return SYM53C500_config(link);
0860 } /* SYM53C500_attach */
0861 
0862 MODULE_AUTHOR("Bob Tracy <rct@frus.com>");
0863 MODULE_DESCRIPTION("SYM53C500 PCMCIA SCSI driver");
0864 MODULE_LICENSE("GPL");
0865 
0866 static const struct pcmcia_device_id sym53c500_ids[] = {
0867     PCMCIA_DEVICE_PROD_ID12("BASICS by New Media Corporation", "SCSI Sym53C500", 0x23c78a9d, 0x0099e7f7),
0868     PCMCIA_DEVICE_PROD_ID12("New Media Corporation", "SCSI Bus Toaster Sym53C500", 0x085a850b, 0x45432eb8),
0869     PCMCIA_DEVICE_PROD_ID2("SCSI9000", 0x21648f44),
0870     PCMCIA_DEVICE_NULL,
0871 };
0872 MODULE_DEVICE_TABLE(pcmcia, sym53c500_ids);
0873 
0874 static struct pcmcia_driver sym53c500_cs_driver = {
0875     .owner      = THIS_MODULE,
0876     .name       = "sym53c500_cs",
0877     .probe      = SYM53C500_probe,
0878     .remove     = SYM53C500_detach,
0879     .id_table       = sym53c500_ids,
0880     .resume     = sym53c500_resume,
0881 };
0882 module_pcmcia_driver(sym53c500_cs_driver);
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