/*======================================================================

    A driver for the Adaptec APA1480 CardBus SCSI Host Adapter

    apa1480_cb.c 1.12 1999/07/30 03:49:13

    The contents of this file are subject to the Mozilla Public
    License Version 1.1 (the "License"); you may not use this file
    except in compliance with the License. You may obtain a copy of
    the License at http://www.mozilla.org/MPL/

    Software distributed under the License is distributed on an "AS
    IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
    implied. See the License for the specific language governing
    rights and limitations under the License.

    The initial developer of the original code is David A. Hinds
    <dhinds@hyper.stanford.edu>.  Portions created by David A. Hinds
    are Copyright (C) 1998 David A. Hinds.  All Rights Reserved.
    
======================================================================*/

#include <pcmcia/config.h>
#include <pcmcia/k_compat.h>

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/malloc.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/ioport.h>
#include <scsi/scsi.h>
#include <linux/major.h>
#include <linux/blk.h>

#include "drivers/scsi/scsi.h"
#include "drivers/scsi/hosts.h"
#include <scsi/scsi_ioctl.h>
#include "drivers/scsi/aic7xxx.h"

#include <pcmcia/driver_ops.h>

#ifdef PCMCIA_DEBUG
static int pc_debug = PCMCIA_DEBUG;
MODULE_PARM(pc_debug, "i");
#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
static char *version =
"apa1480_cb.c 1.12 1999/07/30 03:49:13 (David Hinds)";
#else
#define DEBUG(n, args...)
#endif

/*====================================================================*/

/* Parameters that can be set with 'insmod' */

static int reset = 1;
static int ultra = 0;

MODULE_PARM(reset, "i");
MODULE_PARM(ultra, "i");

/*====================================================================*/

static Scsi_Host_Template driver_template = AIC7XXX;

extern void aic7xxx_setup(char *, int *);

static dev_node_t *apa1480_attach(dev_locator_t *loc);
static void apa1480_detach(dev_node_t *node);

struct driver_operations apa1480_ops = {
    "apa1480_cb", apa1480_attach, NULL, NULL, apa1480_detach
};

/*====================================================================*/

static dev_node_t *apa1480_attach(dev_locator_t *loc)
{
    u_char bus, devfn;
    Scsi_Device *dev;
    dev_node_t *node;
    char s[20];
    int n = 0;
#if (LINUX_VERSION_CODE >= VERSION(2,1,75))
    struct Scsi_Host *host;
#endif
    
    if (loc->bus != LOC_PCI) return NULL;
    bus = loc->b.pci.bus; devfn = loc->b.pci.devfn;
    printk(KERN_INFO "apa1480_attach(bus %d, function %d)\n",
	   bus, devfn);

#if (LINUX_VERSION_CODE >= VERSION(2,1,23))
    driver_template.module = &__this_module;
#else
    driver_template.usage_count = &GET_USE_COUNT(__this_module);
#endif

    sprintf(s, "no_reset:%d,ultra:%d", (reset==0), (ultra!=0));
    aic7xxx_setup(s, NULL);
    scsi_register_module(MODULE_SCSI_HA, &driver_template);

    node = kmalloc(7 * sizeof(dev_node_t), GFP_KERNEL);
#if (LINUX_VERSION_CODE < VERSION(2,1,75))
    for (dev = scsi_devices; dev; dev = dev->next)
	if (dev->host->hostt == &driver_template) {
#else
    for (host = scsi_hostlist; host; host = host->next)
	if (host->hostt == &driver_template)
	    for (dev = host->host_queue; dev; dev = dev->next) {
#endif
	    u_long arg[2], id;
	    kernel_scsi_ioctl(dev, SCSI_IOCTL_GET_IDLUN, arg);
	    id = (arg[0]&0x0f) + ((arg[0]>>4)&0xf0) +
		((arg[0]>>8)&0xf00) + ((arg[0]>>12)&0xf000);
	    node[n].minor = 0;
	    switch (dev->type) {
	    case TYPE_TAPE:
		node[n].major = SCSI_TAPE_MAJOR;
		sprintf(node[n].dev_name, "st#%04lx", id);
		break;
	    case TYPE_DISK:
	    case TYPE_MOD:
		node[n].major = SCSI_DISK0_MAJOR;
		sprintf(node[n].dev_name, "sd#%04lx", id);
		break;
	    case TYPE_ROM:
	    case TYPE_WORM:
		node[n].major = SCSI_CDROM_MAJOR;
		sprintf(node[n].dev_name, "sr#%04lx", id);
		break;
	    default:
		node[n].major = SCSI_GENERIC_MAJOR;
		sprintf(node[n].dev_name, "sg#%04lx", id);
		break;
	    }
	    if (n) node[n-1].next = &node[n];
	    n++;
	}
    if (n == 0) {
	printk(KERN_INFO "apa1480_cs: no SCSI devices found\n");
	return NULL;
    } else
	node[n-1].next = NULL;
    
    MOD_INC_USE_COUNT;
    return node;
}

static void apa1480_detach(dev_node_t *node)
{
    MOD_DEC_USE_COUNT;
    scsi_unregister_module(MODULE_SCSI_HA, &driver_template);
    if (node) kfree(node);
}

/*====================================================================*/

int init_module(void) {
    DEBUG(0, "%s\n", version);
    register_driver(&apa1480_ops);
    return 0;
}

void cleanup_module(void) {
    DEBUG(0, "apa1480_cs: unloading\n");
    unregister_driver(&apa1480_ops);
}