[linux.git] / drivers / ata / pata_platform.c

/*
 * Generic platform device PATA driver
 *
 * Copyright (C) 2006 - 2007  Paul Mundt
 *
 * Based on pata_pcmcia:
 *
 *   Copyright 2005-2006 Red Hat Inc, all rights reserved.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <scsi/scsi_host.h>
#include <linux/ata.h>
#include <linux/libata.h>
#include <linux/platform_device.h>
#include <linux/ata_platform.h>

#define DRV_NAME "pata_platform"
#define DRV_VERSION "1.2"

static int pio_mask = 1;

/*
 * Provide our own set_mode() as we don't want to change anything that has
 * already been configured..
 */
static int pata_platform_set_mode(struct ata_link *link, struct ata_device **unused)
{
	struct ata_device *dev;

	ata_for_each_dev(dev, link, ENABLED) {
		/* We don't really care */
		dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
		dev->xfer_shift = ATA_SHIFT_PIO;
		dev->flags |= ATA_DFLAG_PIO;
		ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
	}
	return 0;
}

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

static struct ata_port_operations pata_platform_port_ops = {
	.inherits		= &ata_sff_port_ops,
	.sff_data_xfer		= ata_sff_data_xfer_noirq,
	.cable_detect		= ata_cable_unknown,
	.set_mode		= pata_platform_set_mode,
	.port_start		= ATA_OP_NULL,
};

static void pata_platform_setup_port(struct ata_ioports *ioaddr,
				     unsigned int shift)
{
	/* Fixup the port shift for platforms that need it */
	ioaddr->data_addr	= ioaddr->cmd_addr + (ATA_REG_DATA    << shift);
	ioaddr->error_addr	= ioaddr->cmd_addr + (ATA_REG_ERR     << shift);
	ioaddr->feature_addr	= ioaddr->cmd_addr + (ATA_REG_FEATURE << shift);
	ioaddr->nsect_addr	= ioaddr->cmd_addr + (ATA_REG_NSECT   << shift);
	ioaddr->lbal_addr	= ioaddr->cmd_addr + (ATA_REG_LBAL    << shift);
	ioaddr->lbam_addr	= ioaddr->cmd_addr + (ATA_REG_LBAM    << shift);
	ioaddr->lbah_addr	= ioaddr->cmd_addr + (ATA_REG_LBAH    << shift);
	ioaddr->device_addr	= ioaddr->cmd_addr + (ATA_REG_DEVICE  << shift);
	ioaddr->status_addr	= ioaddr->cmd_addr + (ATA_REG_STATUS  << shift);
	ioaddr->command_addr	= ioaddr->cmd_addr + (ATA_REG_CMD     << shift);
}

/**
 *	__pata_platform_probe		-	attach a platform interface
 *	@dev: device
 *	@io_res: Resource representing I/O base
 *	@ctl_res: Resource representing CTL base
 *	@irq_res: Resource representing IRQ and its flags
 *	@ioport_shift: I/O port shift
 *	@__pio_mask: PIO mask
 *
 *	Register a platform bus IDE interface. Such interfaces are PIO and we
 *	assume do not support IRQ sharing.
 *
 *	Platform devices are expected to contain at least 2 resources per port:
 *
 *		- I/O Base (IORESOURCE_IO or IORESOURCE_MEM)
 *		- CTL Base (IORESOURCE_IO or IORESOURCE_MEM)
 *
 *	and optionally:
 *
 *		- IRQ	   (IORESOURCE_IRQ)
 *
 *	If the base resources are both mem types, the ioremap() is handled
 *	here. For IORESOURCE_IO, it's assumed that there's no remapping
 *	necessary.
 *
 *	If no IRQ resource is present, PIO polling mode is used instead.
 */
int __devinit __pata_platform_probe(struct device *dev,
				    struct resource *io_res,
				    struct resource *ctl_res,
				    struct resource *irq_res,
				    unsigned int ioport_shift,
				    int __pio_mask)
{
	struct ata_host *host;
	struct ata_port *ap;
	unsigned int mmio;
	int irq = 0;
	int irq_flags = 0;

	/*
	 * Check for MMIO
	 */
	mmio = (( io_res->flags == IORESOURCE_MEM) &&
		(ctl_res->flags == IORESOURCE_MEM));

	/*
	 * And the IRQ
	 */
	if (irq_res && irq_res->start > 0) {
		irq = irq_res->start;
		irq_flags = irq_res->flags;
	}

	/*
	 * Now that that's out of the way, wire up the port..
	 */
	host = ata_host_alloc(dev, 1);
	if (!host)
		return -ENOMEM;
	ap = host->ports[0];

	ap->ops = &pata_platform_port_ops;
	ap->pio_mask = __pio_mask;
	ap->flags |= ATA_FLAG_SLAVE_POSS;

	/*
	 * Use polling mode if there's no IRQ
	 */
	if (!irq) {
		ap->flags |= ATA_FLAG_PIO_POLLING;
		ata_port_desc(ap, "no IRQ, using PIO polling");
	}

	/*
	 * Handle the MMIO case
	 */
	if (mmio) {
		ap->ioaddr.cmd_addr = devm_ioremap(dev, io_res->start,
				resource_size(io_res));
		ap->ioaddr.ctl_addr = devm_ioremap(dev, ctl_res->start,
				resource_size(ctl_res));
	} else {
		ap->ioaddr.cmd_addr = devm_ioport_map(dev, io_res->start,
				resource_size(io_res));
		ap->ioaddr.ctl_addr = devm_ioport_map(dev, ctl_res->start,
				resource_size(ctl_res));
	}
	if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr) {
		dev_err(dev, "failed to map IO/CTL base\n");
		return -ENOMEM;
	}

	ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;

	pata_platform_setup_port(&ap->ioaddr, ioport_shift);

	ata_port_desc(ap, "%s cmd 0x%llx ctl 0x%llx", mmio ? "mmio" : "ioport",
		      (unsigned long long)io_res->start,
		      (unsigned long long)ctl_res->start);

	/* activate */
	return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL,
				 irq_flags, &pata_platform_sht);
}
EXPORT_SYMBOL_GPL(__pata_platform_probe);

/**
 *	__pata_platform_remove		-	unplug a platform interface
 *	@dev: device
 *
 *	A platform bus ATA device has been unplugged. Perform the needed
 *	cleanup. Also called on module unload for any active devices.
 */
int __pata_platform_remove(struct device *dev)
{
	struct ata_host *host = dev_get_drvdata(dev);

	ata_host_detach(host);

	return 0;
}
EXPORT_SYMBOL_GPL(__pata_platform_remove);

static int __devinit pata_platform_probe(struct platform_device *pdev)
{
	struct resource *io_res;
	struct resource *ctl_res;
	struct resource *irq_res;
	struct pata_platform_info *pp_info = pdev->dev.platform_data;

	/*
	 * Simple resource validation ..
	 */
	if ((pdev->num_resources != 3) && (pdev->num_resources != 2)) {
		dev_err(&pdev->dev, "invalid number of resources\n");
		return -EINVAL;
	}

	/*
	 * Get the I/O base first
	 */
	io_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	if (io_res == NULL) {
		io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		if (unlikely(io_res == NULL))
			return -EINVAL;
	}

	/*
	 * Then the CTL base
	 */
	ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1);
	if (ctl_res == NULL) {
		ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
		if (unlikely(ctl_res == NULL))
			return -EINVAL;
	}

	/*
	 * And the IRQ
	 */
	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (irq_res)
		irq_res->flags = pp_info ? pp_info->irq_flags : 0;

	return __pata_platform_probe(&pdev->dev, io_res, ctl_res, irq_res,
				     pp_info ? pp_info->ioport_shift : 0,
				     pio_mask);
}

static int __devexit pata_platform_remove(struct platform_device *pdev)
{
	return __pata_platform_remove(&pdev->dev);
}

static struct platform_driver pata_platform_driver = {
	.probe		= pata_platform_probe,
	.remove		= __devexit_p(pata_platform_remove),
	.driver = {
		.name		= DRV_NAME,
		.owner		= THIS_MODULE,
	},
};

static int __init pata_platform_init(void)
{
	return platform_driver_register(&pata_platform_driver);
}

static void __exit pata_platform_exit(void)
{
	platform_driver_unregister(&pata_platform_driver);
}
module_init(pata_platform_init);
module_exit(pata_platform_exit);

module_param(pio_mask, int, 0);

MODULE_AUTHOR("Paul Mundt");
MODULE_DESCRIPTION("low-level driver for platform device ATA");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
MODULE_ALIAS("platform:" DRV_NAME);
Commit	Line	Data
a20c9e82 PM	1	/*
	2	* Generic platform device PATA driver
	3	*
f7fc0ceb	4	* Copyright (C) 2006 - 2007 Paul Mundt
a20c9e82 PM	5	*
	6	* Based on pata_pcmcia:
	7	*
ab771630	8	* Copyright 2005-2006 Red Hat Inc, all rights reserved.
a20c9e82 PM	9	*
	10	* This file is subject to the terms and conditions of the GNU General Public
	11	* License. See the file "COPYING" in the main directory of this archive
	12	* for more details.
	13	*/
	14	#include <linux/kernel.h>
	15	#include <linux/module.h>
	16	#include <linux/init.h>
	17	#include <linux/blkdev.h>
	18	#include <scsi/scsi_host.h>
	19	#include <linux/ata.h>
	20	#include <linux/libata.h>
	21	#include <linux/platform_device.h>
0a87e3e9	22	#include <linux/ata_platform.h>
a20c9e82 PM	23
a20c9e82 PM	24	#define DRV_NAME "pata_platform"
f7fc0ceb	25	#define DRV_VERSION "1.2"
a20c9e82 PM	26
	27	static int pio_mask = 1;
	28
	29	/*
	30	* Provide our own set_mode() as we don't want to change anything that has
	31	* already been configured..
	32	*/
0260731f	33	static int pata_platform_set_mode(struct ata_link link, struct ata_device *unused)
a20c9e82	34	{
f58229f8	35	struct ata_device *dev;
a20c9e82	36
1eca4365 TH	37	ata_for_each_dev(dev, link, ENABLED) {
	38	/* We don't really care */
	39	dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
	40	dev->xfer_shift = ATA_SHIFT_PIO;
	41	dev->flags \|= ATA_DFLAG_PIO;
	42	ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
a20c9e82	43	}
161c888b	44	return 0;
a20c9e82 PM	45	}
a20c9e82 PM	46
a20c9e82	47	static struct scsi_host_template pata_platform_sht = {
68d1d07b	48	ATA_PIO_SHT(DRV_NAME),
a20c9e82 PM	49	};
	50
	51	static struct ata_port_operations pata_platform_port_ops = {
029cfd6b	52	.inherits = &ata_sff_port_ops,
5682ed33	53	.sff_data_xfer = ata_sff_data_xfer_noirq,
029cfd6b TH	54	.cable_detect = ata_cable_unknown,
	55	.set_mode = pata_platform_set_mode,
	56	.port_start = ATA_OP_NULL,
a20c9e82 PM	57	};
	58
	59	static void pata_platform_setup_port(struct ata_ioports *ioaddr,
cf03613e	60	unsigned int shift)
a20c9e82	61	{
a20c9e82	62	/* Fixup the port shift for platforms that need it */
a20c9e82 PM	63	ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << shift);
	64	ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << shift);
	65	ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift);
	66	ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << shift);
	67	ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << shift);
	68	ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << shift);
	69	ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << shift);
	70	ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << shift);
	71	ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << shift);
	72	ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << shift);
	73	}
	74
	75	/**
cf03613e AV	76	* __pata_platform_probe - attach a platform interface
	77	* @dev: device
	78	* @io_res: Resource representing I/O base
	79	* @ctl_res: Resource representing CTL base
	80	* @irq_res: Resource representing IRQ and its flags
	81	* @ioport_shift: I/O port shift
	82	* @__pio_mask: PIO mask
a20c9e82 PM	83	*
	84	* Register a platform bus IDE interface. Such interfaces are PIO and we
	85	* assume do not support IRQ sharing.
	86	*
f7fc0ceb	87	* Platform devices are expected to contain at least 2 resources per port:
a20c9e82 PM	88	*
	89	* - I/O Base (IORESOURCE_IO or IORESOURCE_MEM)
	90	* - CTL Base (IORESOURCE_IO or IORESOURCE_MEM)
f7fc0ceb PM	91	*
	92	* and optionally:
	93	*
a20c9e82 PM	94	* - IRQ (IORESOURCE_IRQ)
	95	*
	96	* If the base resources are both mem types, the ioremap() is handled
	97	* here. For IORESOURCE_IO, it's assumed that there's no remapping
	98	* necessary.
f7fc0ceb PM	99	*
f7fc0ceb PM	100	* If no IRQ resource is present, PIO polling mode is used instead.
a20c9e82	101	*/
cf03613e AV	102	int __devinit __pata_platform_probe(struct device *dev,
	103	struct resource *io_res,
	104	struct resource *ctl_res,
	105	struct resource *irq_res,
	106	unsigned int ioport_shift,
	107	int __pio_mask)
a20c9e82	108	{
5d728824 TH	109	struct ata_host *host;
5d728824 TH	110	struct ata_port *ap;
a20c9e82	111	unsigned int mmio;
cf03613e AV	112	int irq = 0;
cf03613e AV	113	int irq_flags = 0;
a20c9e82 PM	114
	115	/*
	116	* Check for MMIO
	117	*/
	118	mmio = (( io_res->flags == IORESOURCE_MEM) &&
	119	(ctl_res->flags == IORESOURCE_MEM));
	120
f7fc0ceb PM	121	/*
	122	* And the IRQ
	123	*/
cf03613e AV	124	if (irq_res && irq_res->start > 0) {
	125	irq = irq_res->start;
	126	irq_flags = irq_res->flags;
	127	}
f7fc0ceb	128
a20c9e82 PM	129	/*
	130	* Now that that's out of the way, wire up the port..
	131	*/
cf03613e	132	host = ata_host_alloc(dev, 1);
5d728824 TH	133	if (!host)
	134	return -ENOMEM;
	135	ap = host->ports[0];
	136
	137	ap->ops = &pata_platform_port_ops;
cf03613e	138	ap->pio_mask = __pio_mask;
5d728824	139	ap->flags \|= ATA_FLAG_SLAVE_POSS;
a20c9e82	140
f7fc0ceb PM	141	/*
	142	* Use polling mode if there's no IRQ
	143	*/
	144	if (!irq) {
	145	ap->flags \|= ATA_FLAG_PIO_POLLING;
	146	ata_port_desc(ap, "no IRQ, using PIO polling");
	147	}
	148
a20c9e82 PM	149	/*
	150	* Handle the MMIO case
	151	*/
	152	if (mmio) {
cf03613e	153	ap->ioaddr.cmd_addr = devm_ioremap(dev, io_res->start,
041b5eac	154	resource_size(io_res));
cf03613e	155	ap->ioaddr.ctl_addr = devm_ioremap(dev, ctl_res->start,
041b5eac	156	resource_size(ctl_res));
a20c9e82	157	} else {
cf03613e	158	ap->ioaddr.cmd_addr = devm_ioport_map(dev, io_res->start,
041b5eac	159	resource_size(io_res));
cf03613e	160	ap->ioaddr.ctl_addr = devm_ioport_map(dev, ctl_res->start,
041b5eac	161	resource_size(ctl_res));
0d5ff566	162	}
5d728824	163	if (!ap->ioaddr.cmd_addr \|\| !ap->ioaddr.ctl_addr) {
cf03613e	164	dev_err(dev, "failed to map IO/CTL base\n");
0d5ff566	165	return -ENOMEM;
a20c9e82 PM	166	}
a20c9e82 PM	167
5d728824	168	ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;
a20c9e82	169
cf03613e	170	pata_platform_setup_port(&ap->ioaddr, ioport_shift);
a20c9e82	171
cbcdd875 TH	172	ata_port_desc(ap, "%s cmd 0x%llx ctl 0x%llx", mmio ? "mmio" : "ioport",
	173	(unsigned long long)io_res->start,
	174	(unsigned long long)ctl_res->start);
	175
5d728824	176	/* activate */
9363c382	177	return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL,
cf03613e	178	irq_flags, &pata_platform_sht);
a20c9e82	179	}
cf03613e	180	EXPORT_SYMBOL_GPL(__pata_platform_probe);
a20c9e82 PM	181
a20c9e82 PM	182	/**
cf03613e AV	183	* __pata_platform_remove - unplug a platform interface
cf03613e AV	184	* @dev: device
a20c9e82 PM	185	*
	186	* A platform bus ATA device has been unplugged. Perform the needed
	187	* cleanup. Also called on module unload for any active devices.
	188	*/
78a7ba47	189	int __pata_platform_remove(struct device *dev)
a20c9e82	190	{
a20c9e82 PM	191	struct ata_host *host = dev_get_drvdata(dev);
a20c9e82 PM	192
1a68ff13	193	ata_host_detach(host);
a20c9e82 PM	194
	195	return 0;
	196	}
cf03613e AV	197	EXPORT_SYMBOL_GPL(__pata_platform_remove);
	198
	199	static int __devinit pata_platform_probe(struct platform_device *pdev)
	200	{
	201	struct resource *io_res;
	202	struct resource *ctl_res;
	203	struct resource *irq_res;
	204	struct pata_platform_info *pp_info = pdev->dev.platform_data;
	205
	206	/*
	207	* Simple resource validation ..
	208	*/
	209	if ((pdev->num_resources != 3) && (pdev->num_resources != 2)) {
	210	dev_err(&pdev->dev, "invalid number of resources\n");
	211	return -EINVAL;
	212	}
	213
	214	/*
	215	* Get the I/O base first
	216	*/
	217	io_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	218	if (io_res == NULL) {
	219	io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	220	if (unlikely(io_res == NULL))
	221	return -EINVAL;
	222	}
	223
	224	/*
	225	* Then the CTL base
	226	*/
	227	ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1);
	228	if (ctl_res == NULL) {
	229	ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	230	if (unlikely(ctl_res == NULL))
	231	return -EINVAL;
	232	}
	233
	234	/*
	235	* And the IRQ
	236	*/
	237	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	238	if (irq_res)
	239	irq_res->flags = pp_info ? pp_info->irq_flags : 0;
	240
	241	return __pata_platform_probe(&pdev->dev, io_res, ctl_res, irq_res,
	242	pp_info ? pp_info->ioport_shift : 0,
	243	pio_mask);
	244	}
	245
	246	static int __devexit pata_platform_remove(struct platform_device *pdev)
	247	{
	248	return __pata_platform_remove(&pdev->dev);
	249	}
a20c9e82 PM	250
	251	static struct platform_driver pata_platform_driver = {
	252	.probe = pata_platform_probe,
	253	.remove = __devexit_p(pata_platform_remove),
	254	.driver = {
	255	.name = DRV_NAME,
	256	.owner = THIS_MODULE,
	257	},
	258	};
	259
	260	static int __init pata_platform_init(void)
	261	{
	262	return platform_driver_register(&pata_platform_driver);
	263	}
	264
	265	static void __exit pata_platform_exit(void)
	266	{
	267	platform_driver_unregister(&pata_platform_driver);
	268	}
	269	module_init(pata_platform_init);
	270	module_exit(pata_platform_exit);
	271
	272	module_param(pio_mask, int, 0);
	273
	274	MODULE_AUTHOR("Paul Mundt");
	275	MODULE_DESCRIPTION("low-level driver for platform device ATA");
	276	MODULE_LICENSE("GPL");
	277	MODULE_VERSION(DRV_VERSION);
458622fc	278	MODULE_ALIAS("platform:" DRV_NAME);