text: /*
  *  sym53c500_cs.c	Bob Tracy (rct@frus.com)
  *
  *  A rewrite of the pcmcia-cs add-on driver for newer (circa 1997)
  *  New Media Bus Toaster PCMCIA SCSI cards using the Symbios Logic
  *  53c500 controller: intended for use with 2.6 and later kernels.
  *  The pcmcia-cs add-on version of this driver is not supported
  *  beyond 2.4.  It consisted of three files with history/copyright
  *  information as follows:
  *
  *  SYM53C500.h
  *	Bob Tracy (rct@frus.com)
  *	Original by Tom Corner (tcorner@via.at).
  *	Adapted from NCR53c406a.h which is Copyrighted (C) 1994
  *	Normunds Saumanis (normunds@rx.tech.swh.lv)
  *
  *  SYM53C500.c
  *	Bob Tracy (rct@frus.com)
  *	Original driver by Tom Corner (tcorner@via.at) was adapted
  *	from NCR53c406a.c which is Copyrighted (C) 1994, 1995, 1996 
  *	Normunds Saumanis (normunds@fi.ibm.com)
  *
  *  sym53c500.c
  *	Bob Tracy (rct@frus.com)
  *	Original by Tom Corner (tcorner@via.at) was adapted from a
  *	driver for the Qlogic SCSI card written by
  *	David Hinds (dhinds@allegro.stanford.edu).
  * 
  *  This program is free software; you can redistribute it and/or modify it
  *  under the terms of the GNU General Public License as published by the
  *  Free Software Foundation; either version 2, or (at your option) any
  *  later version.
  *
  *  This program is distributed in the hope that it will be useful, but
  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  *  General Public License for more details.
  */
  
  #define SYM53C500_DEBUG 0
  #define VERBOSE_SYM53C500_DEBUG 0
  
  /*
  *  Set this to 0 if you encounter kernel lockups while transferring 
  *  data in PIO mode.  Note this can be changed via "sysfs".
  */
  #define USE_FAST_PIO 1
  
  /* =============== End of user configurable parameters ============== */
  
  #include <linux/module.h>
  #include <linux/moduleparam.h>
  #include <linux/errno.h>
  #include <linux/init.h>
  #include <linux/interrupt.h>
  #include <linux/kernel.h>
  #include <linux/slab.h>
  #include <linux/string.h>
  #include <linux/ioport.h>
  #include <linux/blkdev.h>
  #include <linux/spinlock.h>
  #include <linux/bitops.h>
  
  #include <asm/io.h>
  #include <asm/dma.h>
  #include <asm/irq.h>
  
  #include <scsi/scsi_ioctl.h>
  #include <scsi/scsi_cmnd.h>
  #include <scsi/scsi_device.h>
  #include <scsi/scsi.h>
  #include <scsi/scsi_host.h>
  
  #include <pcmcia/cistpl.h>
  #include <pcmcia/ds.h>
  #include <pcmcia/ciscode.h>
  
  
  /* ================================================================== */
  
  #define SYNC_MODE 0 		/* Synchronous transfer mode */
  
  /* Default configuration */
  #define C1_IMG   0x07		/* ID=7 */
  #define C2_IMG   0x48		/* FE SCSI2 */
  #define C3_IMG   0x20		/* CDB */
  #define C4_IMG   0x04		/* ANE */
  #define C5_IMG   0xa4		/* ? changed from b6= AA PI SIE POL */
  #define C7_IMG   0x80		/* added for SYM53C500 t. corner */
  
  /* Hardware Registers: offsets from io_port (base) */
  
  /* Control Register Set 0 */
  #define TC_LSB		0x00		/* transfer counter lsb */
  #define TC_MSB		0x01		/* transfer counter msb */
  #define SCSI_FIFO	0x02		/* scsi fifo register */
  #define CMD_REG		0x03		/* command register */
  #define STAT_REG	0x04		/* status register */
  #define DEST_ID		0x04		/* selection/reselection bus id */
  #define INT_REG		0x05		/* interrupt status register */
  #define SRTIMOUT	0x05		/* select/reselect timeout reg */
  #define SEQ_REG		0x06		/* sequence step register */
  #define SYNCPRD		0x06		/* synchronous transfer period */
  #define FIFO_FLAGS	0x07		/* indicates # of bytes in fifo */
  #define SYNCOFF		0x07		/* synchronous offset register */
  #define CONFIG1		0x08		/* configuration register */
  #define CLKCONV		0x09		/* clock conversion register */
  /* #define TESTREG	0x0A */		/* test mode register */
  #define CONFIG2		0x0B		/* configuration 2 register */
  #define CONFIG3		0x0C		/* configuration 3 register */
  #define CONFIG4		0x0D		/* configuration 4 register */
  #define TC_HIGH		0x0E		/* transfer counter high */
  /* #define FIFO_BOTTOM	0x0F */		/* reserve FIFO byte register */
  
  /* Control Register Set 1 */
  /* #define JUMPER_SENSE	0x00 */		/* jumper sense port reg (r/w) */
  /* #define SRAM_PTR	0x01 */		/* SRAM address pointer reg (r/w) */
  /* #define SRAM_DATA	0x02 */		/* SRAM data register (r/w) */
  #define PIO_FIFO	0x04		/* PIO FIFO registers (r/w) */
  /* #define PIO_FIFO1	0x05 */		/*  */
  /* #define PIO_FIFO2	0x06 */		/*  */
  /* #define PIO_FIFO3	0x07 */		/*  */
  #define PIO_STATUS	0x08		/* PIO status (r/w) */
  /* #define ATA_CMD	0x09 */		/* ATA command/status reg (r/w) */
  /* #define ATA_ERR	0x0A */		/* ATA features/error reg (r/w) */
  #define PIO_FLAG	0x0B		/* PIO flag interrupt enable (r/w) */
  #define CONFIG5		0x09		/* configuration 5 register */
  /* #define SIGNATURE	0x0E */		/* signature register (r) */
  /* #define CONFIG6	0x0F */		/* configuration 6 register (r) */
  #define CONFIG7		0x0d
  
  /* select register set 0 */
  #define REG0(x)		(outb(C4_IMG, (x) + CONFIG4))
  /* select register set 1 */
  #define REG1(x)		outb(C7_IMG, (x) + CONFIG7); outb(C5_IMG, (x) + CONFIG5)
  
  #if SYM53C500_DEBUG
  #define DEB(x) x
  #else
  #define DEB(x)
  #endif
  
  #if VERBOSE_SYM53C500_DEBUG
  #define VDEB(x) x
  #else
  #define VDEB(x)
  #endif
  
  #define LOAD_DMA_COUNT(x, count) \
    outb(count & 0xff, (x) + TC_LSB); \
    outb((count >> 8) & 0xff, (x) + TC_MSB); \
    outb((count >> 16) & 0xff, (x) + TC_HIGH);
  
  /* Chip commands */
  #define DMA_OP               0x80
  
  #define SCSI_NOP             0x00
  #define FLUSH_FIFO           0x01
  #define CHIP_RESET           0x02
  #define SCSI_RESET           0x03
  #define RESELECT             0x40
  #define SELECT_NO_ATN        0x41
  #define SELECT_ATN           0x42
  #define SELECT_ATN_STOP      0x43
  #define ENABLE_SEL           0x44
  #define DISABLE_SEL          0x45
  #define SELECT_ATN3          0x46
  #define RESELECT3            0x47
  #define TRANSFER_INFO        0x10
  #define INIT_CMD_COMPLETE    0x11
  #define MSG_ACCEPT           0x12
  #define TRANSFER_PAD         0x18
  #define SET_ATN              0x1a
  #define RESET_ATN            0x1b
  #define SEND_MSG             0x20
  #define SEND_STATUS          0x21
  #define SEND_DATA            0x22
  #define DISCONN_SEQ          0x23
  #define TERMINATE_SEQ        0x24
  #define TARG_CMD_COMPLETE    0x25
  #define DISCONN              0x27
  #define RECV_MSG             0x28
  #define RECV_CMD             0x29
  #define RECV_DATA            0x2a
  #define RECV_CMD_SEQ         0x2b
  #define TARGET_ABORT_DMA     0x04
  
  /* ================================================================== */
  
  struct scsi_info_t {
  	struct pcmcia_device	*p_dev;
  	struct Scsi_Host *host;
  	unsigned short manf_id;
  };
  
  /*
  *  Repository for per-instance host data.
  */
  struct sym53c500_data {
  	struct scsi_cmnd *current_SC;
  	int fast_pio;
  };
  
  enum Phase {
      idle,
      data_out,
      data_in,
      command_ph,
      status_ph,
      message_out,
      message_in
  };
  
  /* ================================================================== */
  
  static void
  chip_init(int io_port)
  {
  	REG1(io_port);
  	outb(0x01, io_port + PIO_STATUS);
  	outb(0x00, io_port + PIO_FLAG);
  
  	outb(C4_IMG, io_port + CONFIG4);	/* REG0(io_port); */
  	outb(C3_IMG, io_port + CONFIG3);
  	outb(C2_IMG, io_port + CONFIG2);
  	outb(C1_IMG, io_port + CONFIG1);
  
  	outb(0x05, io_port + CLKCONV);	/* clock conversion factor */
  	outb(0x9C, io_port + SRTIMOUT);	/* Selection timeout */
  	outb(0x05, io_port + SYNCPRD);	/* Synchronous transfer period */
  	outb(SYNC_MODE, io_port + SYNCOFF);	/* synchronous mode */  
  }
  
  static void
  SYM53C500_int_host_reset(int io_port)
  {
  	outb(C4_IMG, io_port + CONFIG4);	/* REG0(io_port); */
  	outb(CHIP_RESET, io_port + CMD_REG);
  	outb(SCSI_NOP, io_port + CMD_REG);	/* required after reset */
  	outb(SCSI_RESET, io_port + CMD_REG);
  	chip_init(io_port);
  }
  
  static __inline__ int
  SYM53C500_pio_read(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
  {
  	int i;
  	int len;	/* current scsi fifo size */
  
  	REG1(base);
  	while (reqlen) {
  		i = inb(base + PIO_STATUS);
  		/* VDEB(printk("pio_status=%x\n", i)); */
  		if (i & 0x80) 
  			return 0;
  
  		switch (i & 0x1e) {
  		default:
  		case 0x10:	/* fifo empty */
  			len = 0;
  			break;
  		case 0x0:
  			len = 1;
  			break; 
  		case 0x8:	/* fifo 1/3 full */
  			len = 42;
  			break;
  		case 0xc:	/* fifo 2/3 full */
  			len = 84;
  			break;
  		case 0xe:	/* fifo full */
  			len = 128;
  			break;
  		}
  
  		if ((i & 0x40) && len == 0) { /* fifo empty and interrupt occurred */
  			return 0;
  		}
  
  		if (len) {
  			if (len > reqlen) 
  				len = reqlen;
  
  			if (fast_pio && len > 3) {
  				insl(base + PIO_FIFO, request, len >> 2);
  				request += len & 0xfc; 
  				reqlen -= len & 0xfc; 
  			} else {
  				while (len--) {
  					*request++ = inb(base + PIO_FIFO);
  					reqlen--;
  				}
  			} 
  		}
  	}
  	return 0;
  }
  
  static __inline__ int
  SYM53C500_pio_write(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
  {
  	int i = 0;
  	int len;	/* current scsi fifo size */
  
  	REG1(base);
  	while (reqlen && !(i & 0x40)) {
  		i = inb(base + PIO_STATUS);
  		/* VDEB(printk("pio_status=%x\n", i)); */
  		if (i & 0x80)	/* error */
  			return 0;
  
  		switch (i & 0x1e) {
  		case 0x10:
  			len = 128;
  			break;
  		case 0x0:
  			len = 84;
  			break;
  		case 0x8:
  			len = 42;
  			break;
  		case 0xc:
  			len = 1;
  			break;
  		default:
  		case 0xe:
  			len = 0;
  			break;
  		}
  
  		if (len) {
  			if (len > reqlen)
  				len = reqlen;
  
  			if (fast_pio && len > 3) {
  				outsl(base + PIO_FIFO, request, len >> 2);
  				request += len & 0xfc;
  				reqlen -= len & 0xfc;
  			} else {
  				while (len--) {
  					outb(*request++, base + PIO_FIFO);
  					reqlen--;
  				}
  			}
  		}
  	}
  	return 0;
  }
  
  static irqreturn_t
  SYM53C500_intr(int irq, void *dev_id)
  {
  	unsigned long flags;
  	struct Scsi_Host *dev = dev_id;
  	DEB(unsigned char fifo_size;)
  	DEB(unsigned char seq_reg;)
  	unsigned char status, int_reg;
  	unsigned char pio_status;
  	int port_base = dev->io_port;
  	struct sym53c500_data *data =
  	    (struct sym53c500_data *)dev->hostdata;
  	struct scsi_cmnd *curSC = data->current_SC;
  	int fast_pio = data->fast_pio;
  
  	spin_lock_irqsave(dev->host_lock, flags);
  
  	VDEB(printk("SYM53C500_intr called\n"));
  
  	REG1(port_base);
  	pio_status = inb(port_base + PIO_STATUS);
  	REG0(port_base);
  	status = inb(port_base + STAT_REG);
  	DEB(seq_reg = inb(port_base + SEQ_REG));
  	int_reg = inb(port_base + INT_REG);
  	DEB(fifo_size = inb(port_base + FIFO_FLAGS) & 0x1f);
  
  #if SYM53C500_DEBUG
  	printk("status=%02x, seq_reg=%02x, int_reg=%02x, fifo_size=%02x", 
  	    status, seq_reg, int_reg, fifo_size);
  	printk(", pio=%02x\n", pio_status);
  #endif /* SYM53C500_DEBUG */
  
  	if (int_reg & 0x80) {	/* SCSI reset intr */
  		DEB(printk("SYM53C500: reset intr received\n"));
  		curSC->result = DID_RESET << 16;
  		goto idle_out;
  	}
  
  	if (pio_status & 0x80) {
  		printk("SYM53C500: Warning: PIO error!\n");
  		curSC->result = DID_ERROR << 16;
  		goto idle_out;
  	}
  
  	if (status & 0x20) {		/* Parity error */
  		printk("SYM53C500: Warning: parity error!\n");
  		curSC->result = DID_PARITY << 16;
  		goto idle_out;
  	}
  
  	if (status & 0x40) {		/* Gross error */
  		printk("SYM53C500: Warning: gross error!\n");
  		curSC->result = DID_ERROR << 16;
  		goto idle_out;
  	}
  
  	if (int_reg & 0x20) {		/* Disconnect */
  		DEB(printk("SYM53C500: disconnect intr received\n"));
  		if (curSC->SCp.phase != message_in) {	/* Unexpected disconnect */
  			curSC->result = DID_NO_CONNECT << 16;
  		} else {	/* Command complete, return status and message */
  			curSC->result = (curSC->SCp.Status & 0xff)
  			    | ((curSC->SCp.Message & 0xff) << 8) | (DID_OK << 16);
  		}
  		goto idle_out;
  	}
  
  	switch (status & 0x07) {	/* scsi phase */
  	case 0x00:			/* DATA-OUT */
  		if (int_reg & 0x10) {	/* Target requesting info transfer */
  			struct scatterlist *sg;
  			int i;
  
  			curSC->SCp.phase = data_out;
  			VDEB(printk("SYM53C500: Data-Out phase\n"));
  			outb(FLUSH_FIFO, port_base + CMD_REG);
  			LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC));	/* Max transfer size */
  			outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
  
  			scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
  				SYM53C500_pio_write(fast_pio, port_base,
  				    sg_virt(sg), sg->length);
  			}
  			REG0(port_base);
  		}
  		break;
  
  	case 0x01:		/* DATA-IN */
  		if (int_reg & 0x10) {	/* Target requesting info transfer */
  			struct scatterlist *sg;
  			int i;
  
  			curSC->SCp.phase = data_in;
  			VDEB(printk("SYM53C500: Data-In phase\n"));
  			outb(FLUSH_FIFO, port_base + CMD_REG);
  			LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC));	/* Max transfer size */
  			outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
  
  			scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
  				SYM53C500_pio_read(fast_pio, port_base,
  					sg_virt(sg), sg->length);
  			}
  			REG0(port_base);
  		}
  		break;
  
  	case 0x02:		/* COMMAND */
  		curSC->SCp.phase = command_ph;
  		printk("SYM53C500: Warning: Unknown interrupt occurred in command phase!\n");
  		break;
  
  	case 0x03:		/* STATUS */
  		curSC->SCp.phase = status_ph;
  		VDEB(printk("SYM53C500: Status phase\n"));
  		outb(FLUSH_FIFO, port_base + CMD_REG);
  		outb(INIT_CMD_COMPLETE, port_base + CMD_REG);
  		break;
  
  	case 0x04:		/* Reserved */
  	case 0x05:		/* Reserved */
  		printk("SYM53C500: WARNING: Reserved phase!!!\n");
  		break;
  
  	case 0x06:		/* MESSAGE-OUT */
  		DEB(printk("SYM53C500: Message-Out phase\n"));
  		curSC->SCp.phase = message_out;
  		outb(SET_ATN, port_base + CMD_REG);	/* Reject the message */
  		outb(MSG_ACCEPT, port_base + CMD_REG);
  		break;
  
  	case 0x07:		/* MESSAGE-IN */
  		VDEB(printk("SYM53C500: Message-In phase\n"));
  		curSC->SCp.phase = message_in;
  
  		curSC->SCp.Status = inb(port_base + SCSI_FIFO);
  		curSC->SCp.Message = inb(port_base + SCSI_FIFO);
  
  		VDEB(printk("SCSI FIFO size=%d\n", inb(port_base + FIFO_FLAGS) & 0x1f));
  		DEB(printk("Status = %02x  Message = %02x\n", curSC->SCp.Status, curSC->SCp.Message));
  
  		if (curSC->SCp.Message == SAVE_POINTERS || curSC->SCp.Message == DISCONNECT) {
  			outb(SET_ATN, port_base + CMD_REG);	/* Reject message */
  			DEB(printk("Discarding SAVE_POINTERS message\n"));
  		}
  		outb(MSG_ACCEPT, port_base + CMD_REG);
  		break;
  	}
  out:
  	spin_unlock_irqrestore(dev->host_lock, flags);
  	return IRQ_HANDLED;
  
  idle_out:
  	curSC->SCp.phase = idle;
  	curSC->scsi_done(curSC);
  	goto out;
  }
  
  static void
  SYM53C500_release(struct pcmcia_device *link)
  {
  	struct scsi_info_t *info = link->priv;
  	struct Scsi_Host *shost = info->host;
  
  	dev_dbg(&link->dev, "SYM53C500_release\n");
  
  	/*
  	*  Do this before releasing/freeing resources.
  	*/
  	scsi_remove_host(shost);
  
  	/*
  	*  Interrupts getting hosed on card removal.  Try
  	*  the following code, mostly from qlogicfas.c.
  	*/
  	if (shost->irq)
  		free_irq(shost->irq, shost);
  	if (shost->io_port && shost->n_io_port)
  		release_region(shost->io_port, shost->n_io_port);
  
  	pcmcia_disable_device(link);
  
  	scsi_host_put(shost);
  } /* SYM53C500_release */
  
  static const char*
  SYM53C500_info(struct Scsi_Host *SChost)
  {
  	static char info_msg[256];
  	struct sym53c500_data *data =
  	    (struct sym53c500_data *)SChost->hostdata;
  
  	DEB(printk("SYM53C500_info called\n"));
  	(void)snprintf(info_msg, sizeof(info_msg),
  	    "SYM53C500 at 0x%lx, IRQ %d, %s PIO mode.", 
  	    SChost->io_port, SChost->irq, data->fast_pio ? "fast" : "slow");
  	return (info_msg);
  }
  
  static int 
  SYM53C500_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
  {
  	int i;
  	int port_base = SCpnt->device->host->io_port;
  	struct sym53c500_data *data =
  	    (struct sym53c500_data *)SCpnt->device->host->hostdata;
  
  	VDEB(printk("SYM53C500_queue called\n"));
  
  	DEB(printk("cmd=%02x, cmd_len=%02x, target=%02x, lun=%02x, bufflen=%d\n", 
  	    SCpnt->cmnd[0], SCpnt->cmd_len, SCpnt->device->id, 
  		   (u8)SCpnt->device->lun,  scsi_bufflen(SCpnt)));
  
  	VDEB(for (i = 0; i < SCpnt->cmd_len; i++)
  	    printk("cmd[%d]=%02x  ", i, SCpnt->cmnd[i]));
  	VDEB(printk("\n"));
  
  	data->current_SC = SCpnt;
  	data->current_SC->scsi_done = done;
  	data->current_SC->SCp.phase = command_ph;
  	data->current_SC->SCp.Status = 0;
  	data->current_SC->SCp.Message = 0;
  
  	/* We are locked here already by the mid layer */
  	REG0(port_base);
  	outb(scmd_id(SCpnt), port_base + DEST_ID);	/* set destination */
  	outb(FLUSH_FIFO, port_base + CMD_REG);	/* reset the fifos */
  
  	for (i = 0; i < SCpnt->cmd_len; i++) {
  		outb(SCpnt->cmnd[i], port_base + SCSI_FIFO);
  	}
  	outb(SELECT_NO_ATN, port_base + CMD_REG);
  
  	return 0;
  }
  
  static DEF_SCSI_QCMD(SYM53C500_queue)
  
  static int 
  SYM53C500_host_reset(struct scsi_cmnd *SCpnt)
  {
  	int port_base = SCpnt->device->host->io_port;
  
  	DEB(printk("SYM53C500_host_reset called\n"));
  	spin_lock_irq(SCpnt->device->host->host_lock);
  	SYM53C500_int_host_reset(port_base);
  	spin_unlock_irq(SCpnt->device->host->host_lock);
  
  	return SUCCESS;
  }
  
  static int 
  SYM53C500_biosparm(struct scsi_device *disk,
      struct block_device *dev,
      sector_t capacity, int *info_array)
  {
  	int size;
  
  	DEB(printk("SYM53C500_biosparm called\n"));
  
  	size = capacity;
  	info_array[0] = 64;		/* heads */
  	info_array[1] = 32;		/* sectors */
  	info_array[2] = size >> 11;	/* cylinders */
  	if (info_array[2] > 1024) {	/* big disk */
  		info_array[0] = 255;
  		info_array[1] = 63;
  		info_array[2] = size / (255 * 63);
  	}
  	return 0;
  }
  
  static ssize_t
  SYM53C500_show_pio(struct device *dev, struct device_attribute *attr,
  		   char *buf)
  {
  	struct Scsi_Host *SHp = class_to_shost(dev);
  	struct sym53c500_data *data =
  	    (struct sym53c500_data *)SHp->hostdata;
  
  	return snprintf(buf, 4, "%d\n", data->fast_pio);
  }
  
  static ssize_t
  SYM53C500_store_pio(struct device *dev, struct device_attribute *attr,
  		    const char *buf, size_t count)
  {
  	int pio;
  	struct Scsi_Host *SHp = class_to_shost(dev);
  	struct sym53c500_data *data =
  	    (struct sym53c500_data *)SHp->hostdata;
  
  	pio = simple_strtoul(buf, NULL, 0);
  	if (pio == 0 || pio == 1) {
  		data->fast_pio = pio;
  		return count;
  	}
  	else
  		return -EINVAL;
  }
  
  /*
  *  SCSI HBA device attributes we want to
  *  make available via sysfs.
  */
  static struct device_attribute SYM53C500_pio_attr = {
  	.attr = {
  		.name = "fast_pio",
  		.mode = (S_IRUGO | S_IWUSR),
  	},
  	.show = SYM53C500_show_pio,
  	.store = SYM53C500_store_pio,
  };
  
  static struct device_attribute *SYM53C500_shost_attrs[] = {
  	&SYM53C500_pio_attr,
  	NULL,
  };
  
  /*
  *  scsi_host_template initializer
  */
  static struct scsi_host_template sym53c500_driver_template = {
       .module			= THIS_MODULE,
       .name			= "SYM53C500",
       .info			= SYM53C500_info,
       .queuecommand		= SYM53C500_queue,
       .eh_host_reset_handler	= SYM53C500_host_reset,
       .bios_param		= SYM53C500_biosparm,
       .proc_name			= "SYM53C500",
       .can_queue			= 1,
       .this_id			= 7,
       .sg_tablesize		= 32,
       .shost_attrs		= SYM53C500_shost_attrs
  };
  
  static int SYM53C500_config_check(struct pcmcia_device *p_dev, void *priv_data)
  {
  	p_dev->io_lines = 10;
  	p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
  	p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
  
  	if (p_dev->resource[0]->start == 0)
  		return -ENODEV;
  
  	return pcmcia_request_io(p_dev);
  }
  
  static int
  SYM53C500_config(struct pcmcia_device *link)
  {
  	struct scsi_info_t *info = link->priv;
  	int ret;
  	int irq_level, port_base;
  	struct Scsi_Host *host;
  	struct scsi_host_template *tpnt = &sym53c500_driver_template;
  	struct sym53c500_data *data;
  
  	dev_dbg(&link->dev, "SYM53C500_config\n");
  
  	info->manf_id = link->manf_id;
  
  	ret = pcmcia_loop_config(link, SYM53C500_config_check, NULL);
  	if (ret)
  		goto failed;
  
  	if (!link->irq)
  		goto failed;
  
  	ret = pcmcia_enable_device(link);
  	if (ret)
  		goto failed;
  
  	/*
  	*  That's the trouble with copying liberally from another driver.
  	*  Some things probably aren't relevant, and I suspect this entire
  	*  section dealing with manufacturer IDs can be scrapped.	--rct
  	*/
  	if ((info->manf_id == MANFID_MACNICA) ||
  	    (info->manf_id == MANFID_PIONEER) ||
  	    (info->manf_id == 0x0098)) {
  		/* set ATAcmd */
  		outb(0xb4, link->resource[0]->start + 0xd);
  		outb(0x24, link->resource[0]->start + 0x9);
  		outb(0x04, link->resource[0]->start + 0xd);
  	}
  
  	/*
  	*  irq_level == 0 implies tpnt->can_queue == 0, which
  	*  is not supported in 2.6.  Thus, only irq_level > 0
  	*  will be allowed.
  	*
  	*  Possible port_base values are as follows:
  	*
  	*	0x130, 0x230, 0x280, 0x290,
  	*	0x320, 0x330, 0x340, 0x350
  	*/
  	port_base = link->resource[0]->start;
  	irq_level = link->irq;
  
  	DEB(printk("SYM53C500: port_base=0x%x, irq=%d, fast_pio=%d\n",
  	    port_base, irq_level, USE_FAST_PIO);)
  
  	chip_init(port_base);
  
  	host = scsi_host_alloc(tpnt, sizeof(struct sym53c500_data));
  	if (!host) {
  		printk("SYM53C500: Unable to register host, giving up.\n");
  		goto err_release;
  	}
  
  	data = (struct sym53c500_data *)host->hostdata;
  
  	if (irq_level > 0) {
  		if (request_irq(irq_level, SYM53C500_intr, IRQF_SHARED, "SYM53C500", host)) {
  			printk("SYM53C500: unable to allocate IRQ %d\n", irq_level);
  			goto err_free_scsi;
  		}
  		DEB(printk("SYM53C500: allocated IRQ %d\n", irq_level));
  	} else if (irq_level == 0) {
  		DEB(printk("SYM53C500: No interrupts detected\n"));
  		goto err_free_scsi;
  	} else {
  		DEB(printk("SYM53C500: Shouldn't get here!\n"));
  		goto err_free_scsi;
  	}
  
  	host->unique_id = port_base;
  	host->irq = irq_level;
  	host->io_port = port_base;
  	host->n_io_port = 0x10;
  	host->dma_channel = -1;
  
  	/*
  	*  Note fast_pio is set to USE_FAST_PIO by
  	*  default, but can be changed via "sysfs".
  	*/
  	data->fast_pio = USE_FAST_PIO;
  
  	info->host = host;
  
  	if (scsi_add_host(host, NULL))
  		goto err_free_irq;
  
  	scsi_scan_host(host);
  
  	return 0;
  
  err_free_irq:
  	free_irq(irq_level, host);
  err_free_scsi:
  	scsi_host_put(host);
  err_release:
  	release_region(port_base, 0x10);
  	printk(KERN_INFO "sym53c500_cs: no SCSI devices found\n");
  	return -ENODEV;
  
  failed:
  	SYM53C500_release(link);
  	return -ENODEV;
  } /* SYM53C500_config */
  
  static int sym53c500_resume(struct pcmcia_device *link)
  {
  	struct scsi_info_t *info = link->priv;
  
  	/* See earlier comment about manufacturer IDs. */
  	if ((info->manf_id == MANFID_MACNICA) ||
  	    (info->manf_id == MANFID_PIONEER) ||
  	    (info->manf_id == 0x0098)) {
  		outb(0x80, link->resource[0]->start + 0xd);
  		outb(0x24, link->resource[0]->start + 0x9);
  		outb(0x04, link->resource[0]->start + 0xd);
  	}
  	/*
  	 *  If things don't work after a "resume",
  	 *  this is a good place to start looking.
  	 */
  	SYM53C500_int_host_reset(link->resource[0]->start);
  
  	return 0;
  }
  
  static void
  SYM53C500_detach(struct pcmcia_device *link)
  {
  	dev_dbg(&link->dev, "SYM53C500_detach\n");
  
  	SYM53C500_release(link);
  
  	kfree(link->priv);
  	link->priv = NULL;
  } /* SYM53C500_detach */
  
  static int
  SYM53C500_probe(struct pcmcia_device *link)
  {
  	struct scsi_info_t *info;
  
  	dev_dbg(&link->dev, "SYM53C500_attach()\n");
  
  	/* Create new SCSI device */
  	info = kzalloc(sizeof(*info), GFP_KERNEL);
  	if (!info)
  		return -ENOMEM;
  	info->p_dev = link;
  	link->priv = info;
  	link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
  
  	return SYM53C500_config(link);
  } /* SYM53C500_attach */
  
  MODULE_AUTHOR("Bob Tracy <rct@frus.com>");
  MODULE_DESCRIPTION("SYM53C500 PCMCIA SCSI driver");
  MODULE_LICENSE("GPL");
  
  static const struct pcmcia_device_id sym53c500_ids[] = {
  	PCMCIA_DEVICE_PROD_ID12("BASICS by New Media Corporation", "SCSI Sym53C500", 0x23c78a9d, 0x0099e7f7),
  	PCMCIA_DEVICE_PROD_ID12("New Media Corporation", "SCSI Bus Toaster Sym53C500", 0x085a850b, 0x45432eb8),
  	PCMCIA_DEVICE_PROD_ID2("SCSI9000", 0x21648f44),
  	PCMCIA_DEVICE_NULL,
  };
  MODULE_DEVICE_TABLE(pcmcia, sym53c500_ids);
  
  static struct pcmcia_driver sym53c500_cs_driver = {
  	.owner		= THIS_MODULE,
  	.name		= "sym53c500_cs",
  	.probe		= SYM53C500_probe,
  	.remove		= SYM53C500_detach,
  	.id_table       = sym53c500_ids,
  	.resume		= sym53c500_resume,
  };
  module_pcmcia_driver(sym53c500_cs_driver);
  