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

    A driver for the Qlogic SCSI card

    qlogic_cs.c 1.79 2000/06/12 21:27:26

    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
    <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
    are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.

    Alternatively, the contents of this file may be used under the
    terms of the GNU General Public License version 2 (the "GPL"), in which
    case the provisions of the GPL are applicable instead of the
    above.  If you wish to allow the use of your version of this file
    only under the terms of the GPL and not to allow others to use
    your version of this file under the MPL, indicate your decision
    by deleting the provisions above and replace them with the notice
    and other provisions required by the GPL.  If you do not delete
    the provisions above, a recipient may use your version of this
    file under either the MPL or the GPL.
    
======================================================================*/

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <asm/io.h>
#include <scsi/scsi.h>
#include <linux/major.h>
#include <linux/blkdev.h>
#include <scsi/scsi_ioctl.h>
#include <linux/interrupt.h>

#include "scsi.h"
#include <scsi/scsi_host.h>
#include "../qlogicfas408.h"

#include <pcmcia/version.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
#include <pcmcia/ciscode.h>

/* Set the following to 2 to use normal interrupt (active high/totempole-
 * tristate), otherwise use 0 (REQUIRED FOR PCMCIA) for active low, open
 * drain
 */
#define INT_TYPE	0

static char qlogic_name[] = "qlogic_cs";

#ifdef PCMCIA_DEBUG
static int pc_debug = PCMCIA_DEBUG;
module_param(pc_debug, int, 0644);
#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
static char *version = "qlogic_cs.c 1.79-ac 2002/10/26 (David Hinds)";
#else
#define DEBUG(n, args...)
#endif

static Scsi_Host_Template qlogicfas_driver_template = {
	.module			= THIS_MODULE,
	.name			= qlogic_name,
	.proc_name		= qlogic_name,
	.info			= qlogicfas408_info,
	.queuecommand		= qlogicfas408_queuecommand,
	.eh_abort_handler	= qlogicfas408_abort,
	.eh_bus_reset_handler	= qlogicfas408_bus_reset,
	.bios_param		= qlogicfas408_biosparam,
	.can_queue		= 1,
	.this_id		= -1,
	.sg_tablesize		= SG_ALL,
	.cmd_per_lun		= 1,
	.use_clustering		= DISABLE_CLUSTERING,
};

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

typedef struct scsi_info_t {
	dev_link_t link;
	dev_node_t node;
	struct Scsi_Host *host;
	unsigned short manf_id;
} scsi_info_t;

static void qlogic_release(dev_link_t *link);
static int qlogic_event(event_t event, int priority, event_callback_args_t * args);

static dev_link_t *qlogic_attach(void);
static void qlogic_detach(dev_link_t *);


static dev_link_t *dev_list = NULL;

static dev_info_t dev_info = "qlogic_cs";

static struct Scsi_Host *qlogic_detect(Scsi_Host_Template *host,
				dev_link_t *link, int qbase, int qlirq)
{
	int qltyp;		/* type of chip */
	int qinitid;
	struct Scsi_Host *shost;	/* registered host structure */
	struct qlogicfas408_priv *priv;

	qltyp = qlogicfas408_get_chip_type(qbase, INT_TYPE);
	qinitid = host->this_id;
	if (qinitid < 0)
		qinitid = 7;	/* if no ID, use 7 */

	qlogicfas408_setup(qbase, qinitid, INT_TYPE);

	host->name = qlogic_name;
	shost = scsi_host_alloc(host, sizeof(struct qlogicfas408_priv));
	if (!shost)
		goto err;
	shost->io_port = qbase;
	shost->n_io_port = 16;
	shost->dma_channel = -1;
	if (qlirq != -1)
		shost->irq = qlirq;

	priv = get_priv_by_host(shost);
	priv->qlirq = qlirq;
	priv->qbase = qbase;
	priv->qinitid = qinitid;
	priv->shost = shost;
	priv->int_type = INT_TYPE;					

	if (request_irq(qlirq, qlogicfas408_ihandl, 0, qlogic_name, shost))
		goto free_scsi_host;

	sprintf(priv->qinfo,
		"Qlogicfas Driver version 0.46, chip %02X at %03X, IRQ %d, TPdma:%d",
		qltyp, qbase, qlirq, QL_TURBO_PDMA);

	if (scsi_add_host(shost, NULL))
		goto free_interrupt;

	scsi_scan_host(shost);

	return shost;

free_interrupt:
	free_irq(qlirq, shost);

free_scsi_host:
	scsi_host_put(shost);
	
err:
	return NULL;
}
static dev_link_t *qlogic_attach(void)
{
	scsi_info_t *info;
	client_reg_t client_reg;
	dev_link_t *link;
	int ret;

	DEBUG(0, "qlogic_attach()\n");

	/* Create new SCSI device */
	info = kmalloc(sizeof(*info), GFP_KERNEL);
	if (!info)
		return NULL;
	memset(info, 0, sizeof(*info));
	link = &info->link;
	link->priv = info;
	link->io.NumPorts1 = 16;
	link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
	link->io.IOAddrLines = 10;
	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
	link->irq.IRQInfo1 = IRQ_LEVEL_ID;
	link->conf.Attributes = CONF_ENABLE_IRQ;
	link->conf.Vcc = 50;
	link->conf.IntType = INT_MEMORY_AND_IO;
	link->conf.Present = PRESENT_OPTION;

	/* Register with Card Services */
	link->next = dev_list;
	dev_list = link;
	client_reg.dev_info = &dev_info;
	client_reg.event_handler = &qlogic_event;
	client_reg.EventMask = CS_EVENT_RESET_REQUEST | CS_EVENT_CARD_RESET | CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL | CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
	client_reg.Version = 0x0210;
	client_reg.event_callback_args.client_data = link;
	ret = pcmcia_register_client(&link->handle, &client_reg);
	if (ret != 0) {
		cs_error(link->handle, RegisterClient, ret);
		qlogic_detach(link);
		return NULL;
	}

	return link;
}				/* qlogic_attach */

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

static void qlogic_detach(dev_link_t * link)
{
	dev_link_t **linkp;

	DEBUG(0, "qlogic_detach(0x%p)\n", link);

	/* Locate device structure */
	for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
		if (*linkp == link)
			break;
	if (*linkp == NULL)
		return;

	if (link->state & DEV_CONFIG)
		qlogic_release(link);

	if (link->handle)
		pcmcia_deregister_client(link->handle);

	/* Unlink device structure, free bits */
	*linkp = link->next;
	kfree(link->priv);

}				/* qlogic_detach */

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

#define CS_CHECK(fn, ret) \
do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)

static void qlogic_config(dev_link_t * link)
{
	client_handle_t handle = link->handle;
	scsi_info_t *info = link->priv;
	tuple_t tuple;
	cisparse_t parse;
	int i, last_ret, last_fn;
	unsigned short tuple_data[32];
	struct Scsi_Host *host;

	DEBUG(0, "qlogic_config(0x%p)\n", link);

	tuple.TupleData = (cisdata_t *) tuple_data;
	tuple.TupleDataMax = 64;
	tuple.TupleOffset = 0;
	tuple.DesiredTuple = CISTPL_CONFIG;
	CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
	CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
	CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
	link->conf.ConfigBase = parse.config.base;

	tuple.DesiredTuple = CISTPL_MANFID;
	if ((pcmcia_get_first_tuple(handle, &tuple) == CS_SUCCESS) && (pcmcia_get_tuple_data(handle, &tuple) == CS_SUCCESS))
		info->manf_id = le16_to_cpu(tuple.TupleData[0]);

	/* Configure card */
	link->state |= DEV_CONFIG;

	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
	CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
	while (1) {
		if (pcmcia_get_tuple_data(handle, &tuple) != 0 ||
				pcmcia_parse_tuple(handle, &tuple, &parse) != 0)
			goto next_entry;
		link->conf.ConfigIndex = parse.cftable_entry.index;
		link->io.BasePort1 = parse.cftable_entry.io.win[0].base;
		link->io.NumPorts1 = parse.cftable_entry.io.win[0].len;
		if (link->io.BasePort1 != 0) {
			i = pcmcia_request_io(handle, &link->io);
			if (i == CS_SUCCESS)
				break;
		}
	      next_entry:
		CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
	}

	CS_CHECK(RequestIRQ, pcmcia_request_irq(handle, &link->irq));
	CS_CHECK(RequestConfiguration, pcmcia_request_configuration(handle, &link->conf));

	if ((info->manf_id == MANFID_MACNICA) || (info->manf_id == MANFID_PIONEER) || (info->manf_id == 0x0098)) {
		/* set ATAcmd */
		outb(0xb4, link->io.BasePort1 + 0xd);
		outb(0x24, link->io.BasePort1 + 0x9);
		outb(0x04, link->io.BasePort1 + 0xd);
	}

	/* The KXL-810AN has a bigger IO port window */
	if (link->io.NumPorts1 == 32)
		host = qlogic_detect(&qlogicfas_driver_template, link,
			link->io.BasePort1 + 16, link->irq.AssignedIRQ);
	else
		host = qlogic_detect(&qlogicfas_driver_template, link,
			link->io.BasePort1, link->irq.AssignedIRQ);
	
	if (!host) {
		printk(KERN_INFO "%s: no SCSI devices found\n", qlogic_name);
		goto out;
	}

	sprintf(info->node.dev_name, "scsi%d", host->host_no);
	link->dev = &info->node;
	info->host = host;

out:
	link->state &= ~DEV_CONFIG_PENDING;
	return;

cs_failed:
	cs_error(link->handle, last_fn, last_ret);
	link->dev = NULL;
	pcmcia_release_configuration(link->handle);
	pcmcia_release_io(link->handle, &link->io);
	pcmcia_release_irq(link->handle, &link->irq);
	link->state &= ~DEV_CONFIG;
	return;

}				/* qlogic_config */

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

static void qlogic_release(dev_link_t *link)
{
	scsi_info_t *info = link->priv;

	DEBUG(0, "qlogic_release(0x%p)\n", link);

	scsi_remove_host(info->host);
	link->dev = NULL;

	free_irq(link->irq.AssignedIRQ, info->host);

	pcmcia_release_configuration(link->handle);
	pcmcia_release_io(link->handle, &link->io);
	pcmcia_release_irq(link->handle, &link->irq);

	scsi_host_put(info->host);

	link->state &= ~DEV_CONFIG;
}

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

static int qlogic_event(event_t event, int priority, event_callback_args_t * args)
{
	dev_link_t *link = args->client_data;

	DEBUG(1, "qlogic_event(0x%06x)\n", event);

	switch (event) {
	case CS_EVENT_CARD_REMOVAL:
		link->state &= ~DEV_PRESENT;
		if (link->state & DEV_CONFIG)
			qlogic_release(link);
		break;
	case CS_EVENT_CARD_INSERTION:
		link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
		qlogic_config(link);
		break;
	case CS_EVENT_PM_SUSPEND:
		link->state |= DEV_SUSPEND;
		/* Fall through... */
	case CS_EVENT_RESET_PHYSICAL:
		if (link->state & DEV_CONFIG)
			pcmcia_release_configuration(link->handle);
		break;
	case CS_EVENT_PM_RESUME:
		link->state &= ~DEV_SUSPEND;
		/* Fall through... */
	case CS_EVENT_CARD_RESET:
		if (link->state & DEV_CONFIG) {
			scsi_info_t *info = link->priv;
			pcmcia_request_configuration(link->handle, &link->conf);
			if ((info->manf_id == MANFID_MACNICA) || (info->manf_id == MANFID_PIONEER) || (info->manf_id == 0x0098)) {
				outb(0x80, link->io.BasePort1 + 0xd);
				outb(0x24, link->io.BasePort1 + 0x9);
				outb(0x04, link->io.BasePort1 + 0xd);
			}
			/* Ugggglllyyyy!!! */
			qlogicfas408_bus_reset(NULL);
		}
		break;
	}
	return 0;
}				/* qlogic_event */


static struct pcmcia_driver qlogic_cs_driver = {
	.owner		= THIS_MODULE,
	.drv		= {
	.name		= "qlogic_cs",
	},
	.attach		= qlogic_attach,
	.detach		= qlogic_detach,
};

static int __init init_qlogic_cs(void)
{
	return pcmcia_register_driver(&qlogic_cs_driver);
}

static void __exit exit_qlogic_cs(void)
{
	pcmcia_unregister_driver(&qlogic_cs_driver);
	BUG_ON(dev_list != NULL);
}

MODULE_AUTHOR("Tom Zerucha, Michael Griffith");
MODULE_DESCRIPTION("Driver for the PCMCIA Qlogic FAS SCSI controllers");
MODULE_LICENSE("GPL");
module_init(init_qlogic_cs);
module_exit(exit_qlogic_cs);