[linux-2.6-block.git] / drivers / ata / pata_qdi.c

/*
 *    pata_qdi.c - QDI VLB ATA controllers
 *	(C) 2006 Red Hat
 *
 * This driver mostly exists as a proof of concept for non PCI devices under
 * libata. While the QDI6580 was 'neat' in 1993 it is no longer terribly
 * useful.
 *
 * Tuning code written from the documentation at
 * http://www.ryston.cz/petr/vlb/qd6500.html
 * http://www.ryston.cz/petr/vlb/qd6580.html
 *
 * Probe code based on drivers/ide/legacy/qd65xx.c
 * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
 * Samuel Thibault <samuel.thibault@ens-lyon.org>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#include <linux/platform_device.h>

#define DRV_NAME "pata_qdi"
#define DRV_VERSION "0.3.1"

#define NR_HOST 4	/* Two 6580s */

struct qdi_data {
	unsigned long timing;
	u8 clock[2];
	u8 last;
	int fast;
	struct platform_device *platform_dev;

};

static struct ata_host *qdi_host[NR_HOST];
static struct qdi_data qdi_data[NR_HOST];
static int nr_qdi_host;

#ifdef MODULE
static int probe_qdi = 1;
#else
static int probe_qdi;
#endif

static void qdi6500_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
	struct ata_timing t;
	struct qdi_data *qdi = ap->host->private_data;
	int active, recovery;
	u8 timing;

	/* Get the timing data in cycles */
	ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);

	if (qdi->fast) {
		active = 8 - clamp_val(t.active, 1, 8);
		recovery = 18 - clamp_val(t.recover, 3, 18);
	} else {
		active = 9 - clamp_val(t.active, 2, 9);
		recovery = 15 - clamp_val(t.recover, 0, 15);
	}
	timing = (recovery << 4) | active | 0x08;

	qdi->clock[adev->devno] = timing;

	outb(timing, qdi->timing);
}

static void qdi6580_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
	struct ata_timing t;
	struct qdi_data *qdi = ap->host->private_data;
	int active, recovery;
	u8 timing;

	/* Get the timing data in cycles */
	ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);

	if (qdi->fast) {
		active = 8 - clamp_val(t.active, 1, 8);
		recovery = 18 - clamp_val(t.recover, 3, 18);
	} else {
		active = 9 - clamp_val(t.active, 2, 9);
		recovery = 15 - clamp_val(t.recover, 0, 15);
	}
	timing = (recovery << 4) | active | 0x08;

	qdi->clock[adev->devno] = timing;

	outb(timing, qdi->timing);

	/* Clear the FIFO */
	if (adev->class != ATA_DEV_ATA)
		outb(0x5F, (qdi->timing & 0xFFF0) + 3);
}

/**
 *	qdi_qc_issue		-	command issue
 *	@qc: command pending
 *
 *	Called when the libata layer is about to issue a command. We wrap
 *	this interface so that we can load the correct ATA timings.
 */

static unsigned int qdi_qc_issue(struct ata_queued_cmd *qc)
{
	struct ata_port *ap = qc->ap;
	struct ata_device *adev = qc->dev;
	struct qdi_data *qdi = ap->host->private_data;

	if (qdi->clock[adev->devno] != qdi->last) {
		if (adev->pio_mode) {
			qdi->last = qdi->clock[adev->devno];
			outb(qdi->clock[adev->devno], qdi->timing);
		}
	}
	return ata_sff_qc_issue(qc);
}

static unsigned int qdi_data_xfer(struct ata_device *dev, unsigned char *buf,
				  unsigned int buflen, int rw)
{
	if (ata_id_has_dword_io(dev->id)) {
		struct ata_port *ap = dev->link->ap;
		int slop = buflen & 3;

		if (rw == READ)
			ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
		else
			iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);

		if (unlikely(slop)) {
			__le32 pad;
			if (rw == READ) {
				pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
				memcpy(buf + buflen - slop, &pad, slop);
			} else {
				memcpy(&pad, buf + buflen - slop, slop);
				iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
			}
			buflen += 4 - slop;
		}
	} else
		buflen = ata_sff_data_xfer(dev, buf, buflen, rw);

	return buflen;
}

static struct scsi_host_template qdi_sht = {
	ATA_PIO_SHT(DRV_NAME),
};

static struct ata_port_operations qdi6500_port_ops = {
	.inherits	= &ata_sff_port_ops,
	.qc_issue	= qdi_qc_issue,
	.sff_data_xfer	= qdi_data_xfer,
	.cable_detect	= ata_cable_40wire,
	.set_piomode	= qdi6500_set_piomode,
};

static struct ata_port_operations qdi6580_port_ops = {
	.inherits	= &qdi6500_port_ops,
	.set_piomode	= qdi6580_set_piomode,
};

/**
 *	qdi_init_one		-	attach a qdi interface
 *	@type: Type to display
 *	@io: I/O port start
 *	@irq: interrupt line
 *	@fast: True if on a > 33Mhz VLB
 *
 *	Register an ISA bus IDE interface. Such interfaces are PIO and we
 *	assume do not support IRQ sharing.
 */

static __init int qdi_init_one(unsigned long port, int type, unsigned long io, int irq, int fast)
{
	unsigned long ctl = io + 0x206;
	struct platform_device *pdev;
	struct ata_host *host;
	struct ata_port *ap;
	void __iomem *io_addr, *ctl_addr;
	int ret;

	/*
	 *	Fill in a probe structure first of all
	 */

	pdev = platform_device_register_simple(DRV_NAME, nr_qdi_host, NULL, 0);
	if (IS_ERR(pdev))
		return PTR_ERR(pdev);

	ret = -ENOMEM;
	io_addr = devm_ioport_map(&pdev->dev, io, 8);
	ctl_addr = devm_ioport_map(&pdev->dev, ctl, 1);
	if (!io_addr || !ctl_addr)
		goto fail;

	ret = -ENOMEM;
	host = ata_host_alloc(&pdev->dev, 1);
	if (!host)
		goto fail;
	ap = host->ports[0];

	if (type == 6580) {
		ap->ops = &qdi6580_port_ops;
		ap->pio_mask = ATA_PIO4;
		ap->flags |= ATA_FLAG_SLAVE_POSS;
	} else {
		ap->ops = &qdi6500_port_ops;
		ap->pio_mask = ATA_PIO2; /* Actually PIO3 !IORDY is possible */
		ap->flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY;
	}

	ap->ioaddr.cmd_addr = io_addr;
	ap->ioaddr.altstatus_addr = ctl_addr;
	ap->ioaddr.ctl_addr = ctl_addr;
	ata_sff_std_ports(&ap->ioaddr);

	ata_port_desc(ap, "cmd %lx ctl %lx", io, ctl);

	/*
	 *	Hook in a private data structure per channel
	 */
	ap->private_data = &qdi_data[nr_qdi_host];

	qdi_data[nr_qdi_host].timing = port;
	qdi_data[nr_qdi_host].fast = fast;
	qdi_data[nr_qdi_host].platform_dev = pdev;

	printk(KERN_INFO DRV_NAME": qd%d at 0x%lx.\n", type, io);

	/* activate */
	ret = ata_host_activate(host, irq, ata_sff_interrupt, 0, &qdi_sht);
	if (ret)
		goto fail;

	qdi_host[nr_qdi_host++] = dev_get_drvdata(&pdev->dev);
	return 0;

 fail:
	platform_device_unregister(pdev);
	return ret;
}

/**
 *	qdi_init		-	attach qdi interfaces
 *
 *	Attach qdi IDE interfaces by scanning the ports it may occupy.
 */

static __init int qdi_init(void)
{
	unsigned long flags;
	static const unsigned long qd_port[2] = { 0x30, 0xB0 };
	static const unsigned long ide_port[2] = { 0x170, 0x1F0 };
	static const int ide_irq[2] = { 14, 15 };

	int ct = 0;
	int i;

	if (probe_qdi == 0)
		return -ENODEV;

	/*
 	 *	Check each possible QD65xx base address
	 */

	for (i = 0; i < 2; i++) {
		unsigned long port = qd_port[i];
		u8 r, res;


		if (request_region(port, 2, "pata_qdi")) {
			/* Check for a card */
			local_irq_save(flags);
			r = inb_p(port);
			outb_p(0x19, port);
			res = inb_p(port);
			outb_p(r, port);
			local_irq_restore(flags);

			/* Fail */
			if (res == 0x19)
			{
				release_region(port, 2);
				continue;
			}

			/* Passes the presence test */
			r = inb_p(port + 1);	/* Check port agrees with port set */
			if ((r & 2) >> 1 != i) {
				release_region(port, 2);
				continue;
			}

			/* Check card type */
			if ((r & 0xF0) == 0xC0) {
				/* QD6500: single channel */
				if (r & 8) {
					/* Disabled ? */
					release_region(port, 2);
					continue;
				}
				if (qdi_init_one(port, 6500, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04) == 0)
					ct++;
			}
			if (((r & 0xF0) == 0xA0) || (r & 0xF0) == 0x50) {
				/* QD6580: dual channel */
				if (!request_region(port + 2 , 2, "pata_qdi"))
				{
					release_region(port, 2);
					continue;
				}
				res = inb(port + 3);
				if (res & 1) {
					/* Single channel mode */
					if (qdi_init_one(port, 6580, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04) == 0)
						ct++;
				} else {
					/* Dual channel mode */
					if (qdi_init_one(port, 6580, 0x1F0, 14, r & 0x04) == 0)
						ct++;
					if (qdi_init_one(port + 2, 6580, 0x170, 15, r & 0x04) == 0)
						ct++;
				}
			}
		}
	}
	if (ct != 0)
		return 0;
	return -ENODEV;
}

static __exit void qdi_exit(void)
{
	int i;

	for (i = 0; i < nr_qdi_host; i++) {
		ata_host_detach(qdi_host[i]);
		/* Free the control resource. The 6580 dual channel has the resources
		 * claimed as a pair of 2 byte resources so we need no special cases...
		 */
		release_region(qdi_data[i].timing, 2);
		platform_device_unregister(qdi_data[i].platform_dev);
	}
}

MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for qdi ATA");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);

module_init(qdi_init);
module_exit(qdi_exit);

module_param(probe_qdi, int, 0);
Commit	Line	Data
669a5db4 JG	1	/*
669a5db4 JG	2	* pata_qdi.c - QDI VLB ATA controllers
ab771630	3	* (C) 2006 Red Hat
669a5db4 JG	4	*
	5	* This driver mostly exists as a proof of concept for non PCI devices under
	6	* libata. While the QDI6580 was 'neat' in 1993 it is no longer terribly
	7	* useful.
	8	*
	9	* Tuning code written from the documentation at
	10	* http://www.ryston.cz/petr/vlb/qd6500.html
	11	* http://www.ryston.cz/petr/vlb/qd6580.html
	12	*
	13	* Probe code based on drivers/ide/legacy/qd65xx.c
	14	* Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
51935355	15	* Samuel Thibault <samuel.thibault@ens-lyon.org>
669a5db4 JG	16	*/
	17
	18	#include <linux/kernel.h>
	19	#include <linux/module.h>
	20	#include <linux/pci.h>
	21	#include <linux/init.h>
	22	#include <linux/blkdev.h>
	23	#include <linux/delay.h>
	24	#include <scsi/scsi_host.h>
	25	#include <linux/libata.h>
	26	#include <linux/platform_device.h>
	27
	28	#define DRV_NAME "pata_qdi"
8bc3fc47	29	#define DRV_VERSION "0.3.1"
669a5db4 JG	30
	31	#define NR_HOST 4 /* Two 6580s */
	32
	33	struct qdi_data {
	34	unsigned long timing;
	35	u8 clock[2];
	36	u8 last;
	37	int fast;
	38	struct platform_device *platform_dev;
85cd7251	39
669a5db4 JG	40	};
	41
	42	static struct ata_host *qdi_host[NR_HOST];
	43	static struct qdi_data qdi_data[NR_HOST];
	44	static int nr_qdi_host;
	45
	46	#ifdef MODULE
	47	static int probe_qdi = 1;
	48	#else
	49	static int probe_qdi;
	50	#endif
	51
	52	static void qdi6500_set_piomode(struct ata_port ap, struct ata_device adev)
	53	{
	54	struct ata_timing t;
	55	struct qdi_data *qdi = ap->host->private_data;
	56	int active, recovery;
	57	u8 timing;
	58
	59	/* Get the timing data in cycles */
	60	ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
85cd7251	61
669a5db4	62	if (qdi->fast) {
07633b5d HH	63	active = 8 - clamp_val(t.active, 1, 8);
07633b5d HH	64	recovery = 18 - clamp_val(t.recover, 3, 18);
669a5db4	65	} else {
07633b5d HH	66	active = 9 - clamp_val(t.active, 2, 9);
07633b5d HH	67	recovery = 15 - clamp_val(t.recover, 0, 15);
669a5db4 JG	68	}
669a5db4 JG	69	timing = (recovery << 4) \| active \| 0x08;
85cd7251	70
669a5db4 JG	71	qdi->clock[adev->devno] = timing;
669a5db4 JG	72
85cd7251	73	outb(timing, qdi->timing);
669a5db4 JG	74	}
	75
	76	static void qdi6580_set_piomode(struct ata_port ap, struct ata_device adev)
	77	{
	78	struct ata_timing t;
	79	struct qdi_data *qdi = ap->host->private_data;
	80	int active, recovery;
	81	u8 timing;
	82
	83	/* Get the timing data in cycles */
	84	ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
85cd7251	85
669a5db4	86	if (qdi->fast) {
07633b5d HH	87	active = 8 - clamp_val(t.active, 1, 8);
07633b5d HH	88	recovery = 18 - clamp_val(t.recover, 3, 18);
669a5db4	89	} else {
07633b5d HH	90	active = 9 - clamp_val(t.active, 2, 9);
07633b5d HH	91	recovery = 15 - clamp_val(t.recover, 0, 15);
669a5db4 JG	92	}
669a5db4 JG	93	timing = (recovery << 4) \| active \| 0x08;
85cd7251	94
669a5db4 JG	95	qdi->clock[adev->devno] = timing;
	96
	97	outb(timing, qdi->timing);
85cd7251	98
669a5db4 JG	99	/* Clear the FIFO */
	100	if (adev->class != ATA_DEV_ATA)
	101	outb(0x5F, (qdi->timing & 0xFFF0) + 3);
	102	}
	103
	104	/**
9363c382	105	* qdi_qc_issue - command issue
669a5db4 JG	106	* @qc: command pending
	107	*
	108	* Called when the libata layer is about to issue a command. We wrap
	109	* this interface so that we can load the correct ATA timings.
	110	*/
	111
9363c382	112	static unsigned int qdi_qc_issue(struct ata_queued_cmd *qc)
669a5db4 JG	113	{
	114	struct ata_port *ap = qc->ap;
	115	struct ata_device *adev = qc->dev;
	116	struct qdi_data *qdi = ap->host->private_data;
	117
	118	if (qdi->clock[adev->devno] != qdi->last) {
	119	if (adev->pio_mode) {
	120	qdi->last = qdi->clock[adev->devno];
	121	outb(qdi->clock[adev->devno], qdi->timing);
	122	}
	123	}
9363c382	124	return ata_sff_qc_issue(qc);
669a5db4 JG	125	}
669a5db4 JG	126
55dba312 TH	127	static unsigned int qdi_data_xfer(struct ata_device dev, unsigned char buf,
55dba312 TH	128	unsigned int buflen, int rw)
669a5db4	129	{
55dba312 TH	130	if (ata_id_has_dword_io(dev->id)) {
	131	struct ata_port *ap = dev->link->ap;
	132	int slop = buflen & 3;
85cd7251	133
55dba312	134	if (rw == READ)
0d5ff566	135	ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
55dba312 TH	136	else
55dba312 TH	137	iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
85cd7251	138
669a5db4	139	if (unlikely(slop)) {
6ad67403	140	__le32 pad;
55dba312	141	if (rw == READ) {
b50e56d8	142	pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
669a5db4	143	memcpy(buf + buflen - slop, &pad, slop);
55dba312 TH	144	} else {
	145	memcpy(&pad, buf + buflen - slop, slop);
	146	iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
669a5db4	147	}
55dba312	148	buflen += 4 - slop;
669a5db4 JG	149	}
669a5db4 JG	150	} else
9363c382	151	buflen = ata_sff_data_xfer(dev, buf, buflen, rw);
55dba312 TH	152
55dba312 TH	153	return buflen;
669a5db4 JG	154	}
	155
	156	static struct scsi_host_template qdi_sht = {
68d1d07b	157	ATA_PIO_SHT(DRV_NAME),
669a5db4 JG	158	};
	159
	160	static struct ata_port_operations qdi6500_port_ops = {
029cfd6b	161	.inherits = &ata_sff_port_ops,
9363c382	162	.qc_issue = qdi_qc_issue,
5682ed33	163	.sff_data_xfer = qdi_data_xfer,
029cfd6b TH	164	.cable_detect = ata_cable_40wire,
029cfd6b TH	165	.set_piomode = qdi6500_set_piomode,
85cd7251	166	};
669a5db4 JG	167
669a5db4 JG	168	static struct ata_port_operations qdi6580_port_ops = {
029cfd6b	169	.inherits = &qdi6500_port_ops,
669a5db4	170	.set_piomode = qdi6580_set_piomode,
85cd7251	171	};
669a5db4 JG	172
	173	/**
	174	* qdi_init_one - attach a qdi interface
	175	* @type: Type to display
	176	* @io: I/O port start
	177	* @irq: interrupt line
	178	* @fast: True if on a > 33Mhz VLB
	179	*
	180	* Register an ISA bus IDE interface. Such interfaces are PIO and we
	181	* assume do not support IRQ sharing.
	182	*/
85cd7251	183
669a5db4 JG	184	static __init int qdi_init_one(unsigned long port, int type, unsigned long io, int irq, int fast)
669a5db4 JG	185	{
cbcdd875	186	unsigned long ctl = io + 0x206;
669a5db4	187	struct platform_device *pdev;
5d728824 TH	188	struct ata_host *host;
5d728824 TH	189	struct ata_port *ap;
0d5ff566	190	void __iomem io_addr, ctl_addr;
669a5db4 JG	191	int ret;
669a5db4 JG	192
669a5db4 JG	193	/*
	194	* Fill in a probe structure first of all
	195	*/
	196
	197	pdev = platform_device_register_simple(DRV_NAME, nr_qdi_host, NULL, 0);
9825d73c AM	198	if (IS_ERR(pdev))
9825d73c AM	199	return PTR_ERR(pdev);
85cd7251	200
0d5ff566 TH	201	ret = -ENOMEM;
0d5ff566 TH	202	io_addr = devm_ioport_map(&pdev->dev, io, 8);
cbcdd875	203	ctl_addr = devm_ioport_map(&pdev->dev, ctl, 1);
0d5ff566 TH	204	if (!io_addr \|\| !ctl_addr)
	205	goto fail;
	206
5d728824 TH	207	ret = -ENOMEM;
	208	host = ata_host_alloc(&pdev->dev, 1);
	209	if (!host)
	210	goto fail;
	211	ap = host->ports[0];
85cd7251	212
669a5db4	213	if (type == 6580) {
5d728824	214	ap->ops = &qdi6580_port_ops;
14bdef98	215	ap->pio_mask = ATA_PIO4;
5d728824	216	ap->flags \|= ATA_FLAG_SLAVE_POSS;
669a5db4	217	} else {
5d728824	218	ap->ops = &qdi6500_port_ops;
14bdef98	219	ap->pio_mask = ATA_PIO2; /* Actually PIO3 !IORDY is possible */
5d728824	220	ap->flags = ATA_FLAG_SLAVE_POSS \| ATA_FLAG_NO_IORDY;
669a5db4	221	}
85cd7251	222
5d728824 TH	223	ap->ioaddr.cmd_addr = io_addr;
	224	ap->ioaddr.altstatus_addr = ctl_addr;
	225	ap->ioaddr.ctl_addr = ctl_addr;
9363c382	226	ata_sff_std_ports(&ap->ioaddr);
669a5db4	227
cbcdd875 TH	228	ata_port_desc(ap, "cmd %lx ctl %lx", io, ctl);
cbcdd875 TH	229
669a5db4 JG	230	/*
	231	* Hook in a private data structure per channel
	232	*/
5d728824	233	ap->private_data = &qdi_data[nr_qdi_host];
669a5db4 JG	234
	235	qdi_data[nr_qdi_host].timing = port;
	236	qdi_data[nr_qdi_host].fast = fast;
	237	qdi_data[nr_qdi_host].platform_dev = pdev;
	238
	239	printk(KERN_INFO DRV_NAME": qd%d at 0x%lx.\n", type, io);
0d5ff566	240
5d728824	241	/* activate */
9363c382	242	ret = ata_host_activate(host, irq, ata_sff_interrupt, 0, &qdi_sht);
5d728824	243	if (ret)
0d5ff566	244	goto fail;
85cd7251	245
669a5db4	246	qdi_host[nr_qdi_host++] = dev_get_drvdata(&pdev->dev);
85cd7251	247	return 0;
0d5ff566 TH	248
	249	fail:
	250	platform_device_unregister(pdev);
	251	return ret;
669a5db4 JG	252	}
	253
	254	/**
	255	* qdi_init - attach qdi interfaces
	256	*
	257	* Attach qdi IDE interfaces by scanning the ports it may occupy.
	258	*/
85cd7251	259
669a5db4 JG	260	static __init int qdi_init(void)
	261	{
	262	unsigned long flags;
	263	static const unsigned long qd_port[2] = { 0x30, 0xB0 };
	264	static const unsigned long ide_port[2] = { 0x170, 0x1F0 };
	265	static const int ide_irq[2] = { 14, 15 };
85cd7251	266
669a5db4 JG	267	int ct = 0;
669a5db4 JG	268	int i;
85cd7251	269
669a5db4 JG	270	if (probe_qdi == 0)
669a5db4 JG	271	return -ENODEV;
85cd7251	272
669a5db4 JG	273	/*
	274	* Check each possible QD65xx base address
	275	*/
85cd7251	276
669a5db4 JG	277	for (i = 0; i < 2; i++) {
	278	unsigned long port = qd_port[i];
	279	u8 r, res;
85cd7251 JG	280
85cd7251 JG	281
669a5db4 JG	282	if (request_region(port, 2, "pata_qdi")) {
	283	/* Check for a card */
	284	local_irq_save(flags);
	285	r = inb_p(port);
	286	outb_p(0x19, port);
	287	res = inb_p(port);
	288	outb_p(r, port);
	289	local_irq_restore(flags);
85cd7251	290
669a5db4 JG	291	/* Fail */
	292	if (res == 0x19)
	293	{
	294	release_region(port, 2);
	295	continue;
	296	}
85cd7251	297
669a5db4 JG	298	/* Passes the presence test */
	299	r = inb_p(port + 1); /* Check port agrees with port set */
	300	if ((r & 2) >> 1 != i) {
	301	release_region(port, 2);
	302	continue;
	303	}
	304
85cd7251	305	/* Check card type */
669a5db4 JG	306	if ((r & 0xF0) == 0xC0) {
	307	/* QD6500: single channel */
	308	if (r & 8) {
	309	/* Disabled ? */
	310	release_region(port, 2);
	311	continue;
	312	}
cc7c15ec AC	313	if (qdi_init_one(port, 6500, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04) == 0)
cc7c15ec AC	314	ct++;
669a5db4 JG	315	}
	316	if (((r & 0xF0) == 0xA0) \|\| (r & 0xF0) == 0x50) {
	317	/* QD6580: dual channel */
	318	if (!request_region(port + 2 , 2, "pata_qdi"))
	319	{
	320	release_region(port, 2);
	321	continue;
	322	}
	323	res = inb(port + 3);
	324	if (res & 1) {
	325	/* Single channel mode */
6878cce5	326	if (qdi_init_one(port, 6580, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04) == 0)
cc7c15ec	327	ct++;
669a5db4 JG	328	} else {
669a5db4 JG	329	/* Dual channel mode */
cc7c15ec AC	330	if (qdi_init_one(port, 6580, 0x1F0, 14, r & 0x04) == 0)
	331	ct++;
	332	if (qdi_init_one(port + 2, 6580, 0x170, 15, r & 0x04) == 0)
	333	ct++;
669a5db4 JG	334	}
	335	}
	336	}
	337	}
	338	if (ct != 0)
	339	return 0;
	340	return -ENODEV;
	341	}
	342
	343	static __exit void qdi_exit(void)
	344	{
	345	int i;
	346
	347	for (i = 0; i < nr_qdi_host; i++) {
24dc5f33	348	ata_host_detach(qdi_host[i]);
669a5db4 JG	349	/* Free the control resource. The 6580 dual channel has the resources
	350	* claimed as a pair of 2 byte resources so we need no special cases...
	351	*/
	352	release_region(qdi_data[i].timing, 2);
	353	platform_device_unregister(qdi_data[i].platform_dev);
85cd7251	354	}
669a5db4 JG	355	}
	356
	357	MODULE_AUTHOR("Alan Cox");
	358	MODULE_DESCRIPTION("low-level driver for qdi ATA");
	359	MODULE_LICENSE("GPL");
	360	MODULE_VERSION(DRV_VERSION);
	361
	362	module_init(qdi_init);
	363	module_exit(qdi_exit);
	364
	365	module_param(probe_qdi, int, 0);
	366