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

    A driver for PCMCIA IDE/ATA disk cards

    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/kernel.h>
#include <linux/init.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/ioport.h>
#include <linux/ide.h>
#include <linux/major.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/system.h>

#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ciscode.h>

#define DRV_NAME "ide-cs"

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

/* Module parameters */

MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
MODULE_DESCRIPTION("PCMCIA ATA/IDE card driver");
MODULE_LICENSE("Dual MPL/GPL");

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

typedef struct ide_info_t {
	struct pcmcia_device	*p_dev;
	struct ide_host		*host;
	int			ndev;
} ide_info_t;

static void ide_release(struct pcmcia_device *);
static int ide_config(struct pcmcia_device *);

static void ide_detach(struct pcmcia_device *p_dev);


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

    ide_attach() creates an "instance" of the driver, allocating
    local data structures for one device.  The device is registered
    with Card Services.

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

static int ide_probe(struct pcmcia_device *link)
{
    ide_info_t *info;

    dev_dbg(&link->dev, "ide_attach()\n");

    /* Create new ide device */
    info = kzalloc(sizeof(*info), GFP_KERNEL);
    if (!info)
	return -ENOMEM;

    info->p_dev = link;
    link->priv = info;

    link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
    link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
    link->config_flags |= CONF_ENABLE_IRQ;

    return ide_config(link);
} /* ide_attach */

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

    This deletes a driver "instance".  The device is de-registered
    with Card Services.  If it has been released, all local data
    structures are freed.  Otherwise, the structures will be freed
    when the device is released.

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

static void ide_detach(struct pcmcia_device *link)
{
    ide_info_t *info = link->priv;

    dev_dbg(&link->dev, "ide_detach(0x%p)\n", link);

    ide_release(link);

    kfree(info);
} /* ide_detach */

static const struct ide_port_ops idecs_port_ops = {
	.quirkproc		= ide_undecoded_slave,
};

static const struct ide_port_info idecs_port_info = {
	.port_ops		= &idecs_port_ops,
	.host_flags		= IDE_HFLAG_NO_DMA,
	.irq_flags		= IRQF_SHARED,
	.chipset		= ide_pci,
};

static struct ide_host *idecs_register(unsigned long io, unsigned long ctl,
				unsigned long irq, struct pcmcia_device *handle)
{
    struct ide_host *host;
    ide_hwif_t *hwif;
    int i, rc;
    struct ide_hw hw, *hws[] = { &hw };

    if (!request_region(io, 8, DRV_NAME)) {
	printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
			DRV_NAME, io, io + 7);
	return NULL;
    }

    if (!request_region(ctl, 1, DRV_NAME)) {
	printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
			DRV_NAME, ctl);
	release_region(io, 8);
	return NULL;
    }

    memset(&hw, 0, sizeof(hw));
    ide_std_init_ports(&hw, io, ctl);
    hw.irq = irq;
    hw.dev = &handle->dev;

    rc = ide_host_add(&idecs_port_info, hws, 1, &host);
    if (rc)
	goto out_release;

    hwif = host->ports[0];

    if (hwif->present)
	return host;

    /* retry registration in case device is still spinning up */
    for (i = 0; i < 10; i++) {
	msleep(100);
	ide_port_scan(hwif);
	if (hwif->present)
	    return host;
    }

    return host;

out_release:
    release_region(ctl, 1);
    release_region(io, 8);
    return NULL;
}

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

    ide_config() is scheduled to run after a CARD_INSERTION event
    is received, to configure the PCMCIA socket, and to make the
    ide device available to the system.

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

struct pcmcia_config_check {
	unsigned long ctl_base;
	int skip_vcc;
	int is_kme;
};

static int pcmcia_check_one_config(struct pcmcia_device *pdev,
				   cistpl_cftable_entry_t *cfg,
				   cistpl_cftable_entry_t *dflt,
				   unsigned int vcc,
				   void *priv_data)
{
	struct pcmcia_config_check *stk = priv_data;

	/* Check for matching Vcc, unless we're desperate */
	if (!stk->skip_vcc) {
		if (cfg->vcc.present & (1 << CISTPL_POWER_VNOM)) {
			if (vcc != cfg->vcc.param[CISTPL_POWER_VNOM] / 10000)
				return -ENODEV;
		} else if (dflt->vcc.present & (1 << CISTPL_POWER_VNOM)) {
			if (vcc != dflt->vcc.param[CISTPL_POWER_VNOM] / 10000)
				return -ENODEV;
		}
	}

	if (cfg->vpp1.present & (1 << CISTPL_POWER_VNOM))
		pdev->vpp = cfg->vpp1.param[CISTPL_POWER_VNOM] / 10000;
	else if (dflt->vpp1.present & (1 << CISTPL_POWER_VNOM))
		pdev->vpp = dflt->vpp1.param[CISTPL_POWER_VNOM] / 10000;

	if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
		cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
		pdev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
		pdev->config_index = cfg->index;
		pdev->resource[0]->start = io->win[0].base;
		if (!(io->flags & CISTPL_IO_16BIT)) {
			pdev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
			pdev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
		}
		if (io->nwin == 2) {
			pdev->resource[0]->end = 8;
			pdev->resource[1]->start = io->win[1].base;
			pdev->resource[1]->end = (stk->is_kme) ? 2 : 1;
			if (pcmcia_request_io(pdev) != 0)
				return -ENODEV;
			stk->ctl_base = pdev->resource[1]->start;
		} else if ((io->nwin == 1) && (io->win[0].len >= 16)) {
			pdev->resource[0]->end = io->win[0].len;
			pdev->resource[1]->end = 0;
			if (pcmcia_request_io(pdev) != 0)
				return -ENODEV;
			stk->ctl_base = pdev->resource[0]->start + 0x0e;
		} else
			return -ENODEV;
		/* If we've got this far, we're done */
		return 0;
	}
	return -ENODEV;
}

static int ide_config(struct pcmcia_device *link)
{
    ide_info_t *info = link->priv;
    struct pcmcia_config_check *stk = NULL;
    int ret = 0, is_kme = 0;
    unsigned long io_base, ctl_base;
    struct ide_host *host;

    dev_dbg(&link->dev, "ide_config(0x%p)\n", link);

    is_kme = ((link->manf_id == MANFID_KME) &&
	      ((link->card_id == PRODID_KME_KXLC005_A) ||
	       (link->card_id == PRODID_KME_KXLC005_B)));

    stk = kzalloc(sizeof(*stk), GFP_KERNEL);
    if (!stk)
	    goto err_mem;
    stk->is_kme = is_kme;
    stk->skip_vcc = io_base = ctl_base = 0;

    if (pcmcia_loop_config(link, pcmcia_check_one_config, stk)) {
	    stk->skip_vcc = 1;
	    if (pcmcia_loop_config(link, pcmcia_check_one_config, stk))
		    goto failed; /* No suitable config found */
    }
    io_base = link->resource[0]->start;
    ctl_base = stk->ctl_base;

    if (!link->irq)
	    goto failed;

    ret = pcmcia_enable_device(link);
    if (ret)
	    goto failed;

    /* disable drive interrupts during IDE probe */
    outb(0x02, ctl_base);

    /* special setup for KXLC005 card */
    if (is_kme)
	outb(0x81, ctl_base+1);

     host = idecs_register(io_base, ctl_base, link->irq, link);
     if (host == NULL && resource_size(link->resource[0]) == 0x20) {
	    outb(0x02, ctl_base + 0x10);
	    host = idecs_register(io_base + 0x10, ctl_base + 0x10,
				  link->irq, link);
    }

    if (host == NULL)
	goto failed;

    info->ndev = 1;
    info->host = host;
    dev_info(&link->dev, "ide-cs: hd%c: Vpp = %d.%d\n",
	    'a' + host->ports[0]->index * 2,
	    link->vpp / 10, link->vpp % 10);

    kfree(stk);
    return 0;

err_mem:
    printk(KERN_NOTICE "ide-cs: ide_config failed memory allocation\n");
    goto failed;

failed:
    kfree(stk);
    ide_release(link);
    return -ENODEV;
} /* ide_config */

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

    After a card is removed, ide_release() will unregister the net
    device, and release the PCMCIA configuration.  If the device is
    still open, this will be postponed until it is closed.

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

static void ide_release(struct pcmcia_device *link)
{
    ide_info_t *info = link->priv;
    struct ide_host *host = info->host;

    dev_dbg(&link->dev, "ide_release(0x%p)\n", link);

    if (info->ndev) {
	ide_hwif_t *hwif = host->ports[0];
	unsigned long data_addr, ctl_addr;

	data_addr = hwif->io_ports.data_addr;
	ctl_addr = hwif->io_ports.ctl_addr;

	ide_host_remove(host);
	info->ndev = 0;

	release_region(ctl_addr, 1);
	release_region(data_addr, 8);
    }

    pcmcia_disable_device(link);
} /* ide_release */


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

    The card status event handler.  Mostly, this schedules other
    stuff to run after an event is received.  A CARD_REMOVAL event
    also sets some flags to discourage the ide drivers from
    talking to the ports.

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

static struct pcmcia_device_id ide_ids[] = {
	PCMCIA_DEVICE_FUNC_ID(4),
	PCMCIA_DEVICE_MANF_CARD(0x0000, 0x0000),	/* Corsair */
	PCMCIA_DEVICE_MANF_CARD(0x0007, 0x0000),	/* Hitachi */
	PCMCIA_DEVICE_MANF_CARD(0x000a, 0x0000),	/* I-O Data CFA */
	PCMCIA_DEVICE_MANF_CARD(0x001c, 0x0001),	/* Mitsubishi CFA */
	PCMCIA_DEVICE_MANF_CARD(0x0032, 0x0704),
	PCMCIA_DEVICE_MANF_CARD(0x0032, 0x2904),
	PCMCIA_DEVICE_MANF_CARD(0x0045, 0x0401),	/* SanDisk CFA */
	PCMCIA_DEVICE_MANF_CARD(0x004f, 0x0000),	/* Kingston */
	PCMCIA_DEVICE_MANF_CARD(0x0097, 0x1620), 	/* TI emulated */
	PCMCIA_DEVICE_MANF_CARD(0x0098, 0x0000),	/* Toshiba */
	PCMCIA_DEVICE_MANF_CARD(0x00a4, 0x002d),
	PCMCIA_DEVICE_MANF_CARD(0x00ce, 0x0000),	/* Samsung */
	PCMCIA_DEVICE_MANF_CARD(0x0319, 0x0000),	/* Hitachi */
	PCMCIA_DEVICE_MANF_CARD(0x2080, 0x0001),
	PCMCIA_DEVICE_MANF_CARD(0x4e01, 0x0100),	/* Viking CFA */
	PCMCIA_DEVICE_MANF_CARD(0x4e01, 0x0200),	/* Lexar, Viking CFA */
	PCMCIA_DEVICE_PROD_ID123("Caravelle", "PSC-IDE ", "PSC000", 0x8c36137c, 0xd0693ab8, 0x2768a9f0),
	PCMCIA_DEVICE_PROD_ID123("CDROM", "IDE", "MCD-601p", 0x1b9179ca, 0xede88951, 0x0d902f74),
	PCMCIA_DEVICE_PROD_ID123("PCMCIA", "IDE CARD", "F1", 0x281f1c5d, 0x1907960c, 0xf7fde8b9),
	PCMCIA_DEVICE_PROD_ID12("ARGOSY", "CD-ROM", 0x78f308dc, 0x66536591),
	PCMCIA_DEVICE_PROD_ID12("ARGOSY", "PnPIDE", 0x78f308dc, 0x0c694728),
	PCMCIA_DEVICE_PROD_ID12("CNF   ", "CD-ROM", 0x46d7db81, 0x66536591),
	PCMCIA_DEVICE_PROD_ID12("CNF CD-M", "CD-ROM", 0x7d93b852, 0x66536591),
	PCMCIA_DEVICE_PROD_ID12("Creative Technology Ltd.", "PCMCIA CD-ROM Interface Card", 0xff8c8a45, 0xfe8020c4),
	PCMCIA_DEVICE_PROD_ID12("Digital Equipment Corporation.", "Digital Mobile Media CD-ROM", 0x17692a66, 0xef1dcbde),
	PCMCIA_DEVICE_PROD_ID12("EXP", "CD+GAME", 0x6f58c983, 0x63c13aaf),
	PCMCIA_DEVICE_PROD_ID12("EXP   ", "CD-ROM", 0x0a5c52fd, 0x66536591),
	PCMCIA_DEVICE_PROD_ID12("EXP   ", "PnPIDE", 0x0a5c52fd, 0x0c694728),
	PCMCIA_DEVICE_PROD_ID12("FREECOM", "PCCARD-IDE", 0x5714cbf7, 0x48e0ab8e),
	PCMCIA_DEVICE_PROD_ID12("HITACHI", "FLASH", 0xf4f43949, 0x9eb86aae),
	PCMCIA_DEVICE_PROD_ID12("HITACHI", "microdrive", 0xf4f43949, 0xa6d76178),
	PCMCIA_DEVICE_PROD_ID12("Hyperstone", "Model1", 0x3d5b9ef5, 0xca6ab420),
	PCMCIA_DEVICE_PROD_ID12("IBM", "microdrive", 0xb569a6e5, 0xa6d76178),
	PCMCIA_DEVICE_PROD_ID12("IBM", "IBM17JSSFP20", 0xb569a6e5, 0xf2508753),
	PCMCIA_DEVICE_PROD_ID12("KINGSTON", "CF CARD 1GB", 0x2e6d1829, 0x55d5bffb),
	PCMCIA_DEVICE_PROD_ID12("KINGSTON", "CF CARD 4GB", 0x2e6d1829, 0x531e7d10),
	PCMCIA_DEVICE_PROD_ID12("KINGSTON", "CF8GB", 0x2e6d1829, 0xacbe682e),
	PCMCIA_DEVICE_PROD_ID12("IO DATA", "CBIDE2      ", 0x547e66dc, 0x8671043b),
	PCMCIA_DEVICE_PROD_ID12("IO DATA", "PCIDE", 0x547e66dc, 0x5c5ab149),
	PCMCIA_DEVICE_PROD_ID12("IO DATA", "PCIDEII", 0x547e66dc, 0xb3662674),
	PCMCIA_DEVICE_PROD_ID12("LOOKMEET", "CBIDE2      ", 0xe37be2b5, 0x8671043b),
	PCMCIA_DEVICE_PROD_ID12("M-Systems", "CF300", 0x7ed2ad87, 0x7e9e78ee),
	PCMCIA_DEVICE_PROD_ID12("M-Systems", "CF500", 0x7ed2ad87, 0x7a13045c),
	PCMCIA_DEVICE_PROD_ID2("NinjaATA-", 0xebe0bd79),
	PCMCIA_DEVICE_PROD_ID12("PCMCIA", "CD-ROM", 0x281f1c5d, 0x66536591),
	PCMCIA_DEVICE_PROD_ID12("PCMCIA", "PnPIDE", 0x281f1c5d, 0x0c694728),
	PCMCIA_DEVICE_PROD_ID12("SHUTTLE TECHNOLOGY LTD.", "PCCARD-IDE/ATAPI Adapter", 0x4a3f0ba0, 0x322560e1),
	PCMCIA_DEVICE_PROD_ID12("SEAGATE", "ST1", 0x87c1b330, 0xe1f30883),
	PCMCIA_DEVICE_PROD_ID12("SAMSUNG", "04/05/06", 0x43d74cb4, 0x6a22777d),
	PCMCIA_DEVICE_PROD_ID12("SMI VENDOR", "SMI PRODUCT", 0x30896c92, 0x703cc5f6),
	PCMCIA_DEVICE_PROD_ID12("TOSHIBA", "MK2001MPL", 0xb4585a1a, 0x3489e003),
	PCMCIA_DEVICE_PROD_ID1("TRANSCEND    512M   ", 0xd0909443),
	PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS1GCF45", 0x709b1bf1, 0xf68b6f32),
	PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS1GCF80", 0x709b1bf1, 0x2a54d4b1),
	PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS2GCF120", 0x709b1bf1, 0x969aa4f2),
	PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS4GCF120", 0x709b1bf1, 0xf54a91c8),
	PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS4GCF133", 0x709b1bf1, 0x7558f133),
	PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS8GCF133", 0x709b1bf1, 0xb2f89b47),
	PCMCIA_DEVICE_PROD_ID12("WIT", "IDE16", 0x244e5994, 0x3e232852),
	PCMCIA_DEVICE_PROD_ID12("WEIDA", "TWTTI", 0xcc7cf69c, 0x212bb918),
	PCMCIA_DEVICE_PROD_ID1("STI Flash", 0xe4a13209),
	PCMCIA_DEVICE_PROD_ID12("STI", "Flash 5.0", 0xbf2df18d, 0x8cb57a0e),
	PCMCIA_MFC_DEVICE_PROD_ID12(1, "SanDisk", "ConnectPlus", 0x7a954bd9, 0x74be00c6),
	PCMCIA_DEVICE_PROD_ID2("Flash Card", 0x5a362506),
	PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, ide_ids);

static struct pcmcia_driver ide_cs_driver = {
	.owner		= THIS_MODULE,
	.drv		= {
		.name	= "ide-cs",
	},
	.probe		= ide_probe,
	.remove		= ide_detach,
	.id_table       = ide_ids,
};

static int __init init_ide_cs(void)
{
	return pcmcia_register_driver(&ide_cs_driver);
}

static void __exit exit_ide_cs(void)
{
	pcmcia_unregister_driver(&ide_cs_driver);
}

late_initcall(init_ide_cs);
module_exit(exit_ide_cs);