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

/*
 * Generic platform device PATA driver
 *
 * Copyright (C) 2006  Paul Mundt
 *
 * Based on pata_pcmcia:
 *
 *   Copyright 2005-2006 Red Hat Inc <alan@redhat.com>, 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/pata_platform.h>

#define DRV_NAME "pata_platform"
#define DRV_VERSION "1.1"

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_link_for_each_dev(dev, link) {
		if (ata_dev_enabled(dev)) {
			/* 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 int ata_dummy_ret0(struct ata_port *ap)	{ return 0; }

static struct scsi_host_template pata_platform_sht = {
	.module			= THIS_MODULE,
	.name			= DRV_NAME,
	.ioctl			= ata_scsi_ioctl,
	.queuecommand		= ata_scsi_queuecmd,
	.can_queue		= ATA_DEF_QUEUE,
	.this_id		= ATA_SHT_THIS_ID,
	.sg_tablesize		= LIBATA_MAX_PRD,
	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
	.emulated		= ATA_SHT_EMULATED,
	.use_clustering		= ATA_SHT_USE_CLUSTERING,
	.proc_name		= DRV_NAME,
	.dma_boundary		= ATA_DMA_BOUNDARY,
	.slave_configure	= ata_scsi_slave_config,
	.slave_destroy		= ata_scsi_slave_destroy,
	.bios_param		= ata_std_bios_param,
};

static struct ata_port_operations pata_platform_port_ops = {
	.set_mode		= pata_platform_set_mode,

	.port_disable		= ata_port_disable,
	.tf_load		= ata_tf_load,
	.tf_read		= ata_tf_read,
	.check_status		= ata_check_status,
	.exec_command		= ata_exec_command,
	.dev_select		= ata_std_dev_select,

	.freeze			= ata_bmdma_freeze,
	.thaw			= ata_bmdma_thaw,
	.error_handler		= ata_bmdma_error_handler,
	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
	.cable_detect		= ata_cable_unknown,

	.qc_prep		= ata_qc_prep,
	.qc_issue		= ata_qc_issue_prot,

	.data_xfer		= ata_data_xfer_noirq,

	.irq_clear		= ata_bmdma_irq_clear,
	.irq_on			= ata_irq_on,
	.irq_ack		= ata_irq_ack,

	.port_start		= ata_dummy_ret0,
};

static void pata_platform_setup_port(struct ata_ioports *ioaddr,
				     struct pata_platform_info *info)
{
	unsigned int shift = 0;

	/* Fixup the port shift for platforms that need it */
	if (info && info->ioport_shift)
		shift = info->ioport_shift;

	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
 *	@pdev: platform device
 *
 *	Register a platform bus IDE interface. Such interfaces are PIO and we
 *	assume do not support IRQ sharing.
 *
 *	Platform devices are expected to contain 3 resources per port:
 *
 *		- I/O Base (IORESOURCE_IO or IORESOURCE_MEM)
 *		- CTL Base (IORESOURCE_IO or IORESOURCE_MEM)
 *		- 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.
 */
static int __devinit pata_platform_probe(struct platform_device *pdev)
{
	struct resource *io_res, *ctl_res;
	struct ata_host *host;
	struct ata_port *ap;
	struct pata_platform_info *pp_info;
	unsigned int mmio;

	/*
	 * Simple resource validation ..
	 */
	if (unlikely(pdev->num_resources != 3)) {
		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;
	}

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

	/*
	 * Now that that's out of the way, wire up the port..
	 */
	host = ata_host_alloc(&pdev->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;

	/*
	 * Handle the MMIO case
	 */
	if (mmio) {
		ap->ioaddr.cmd_addr = devm_ioremap(&pdev->dev, io_res->start,
				io_res->end - io_res->start + 1);
		ap->ioaddr.ctl_addr = devm_ioremap(&pdev->dev, ctl_res->start,
				ctl_res->end - ctl_res->start + 1);
	} else {
		ap->ioaddr.cmd_addr = devm_ioport_map(&pdev->dev, io_res->start,
				io_res->end - io_res->start + 1);
		ap->ioaddr.ctl_addr = devm_ioport_map(&pdev->dev, ctl_res->start,
				ctl_res->end - ctl_res->start + 1);
	}
	if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr) {
		dev_err(&pdev->dev, "failed to map IO/CTL base\n");
		return -ENOMEM;
	}

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

	pp_info = (struct pata_platform_info *)(pdev->dev.platform_data);
	pata_platform_setup_port(&ap->ioaddr, pp_info);

	/* activate */
	return ata_host_activate(host, platform_get_irq(pdev, 0),
				 ata_interrupt, pp_info ? pp_info->irq_flags
				 : 0, &pata_platform_sht);
}

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

	ata_host_detach(host);

	return 0;
}

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);
Commit	Line	Data
a20c9e82 PM	1	/*
	2	* Generic platform device PATA driver
	3	*
	4	* Copyright (C) 2006 Paul Mundt
	5	*
	6	* Based on pata_pcmcia:
	7	*
	8	* Copyright 2005-2006 Red Hat Inc <alan@redhat.com>, all rights reserved.
	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>
	22	#include <linux/pata_platform.h>
	23
	24	#define DRV_NAME "pata_platform"
2a3103ce	25	#define DRV_VERSION "1.1"
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
0260731f	37	ata_link_for_each_dev(dev, link) {
a20c9e82 PM	38	if (ata_dev_enabled(dev)) {
	39	/* We don't really care */
	40	dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
	41	dev->xfer_shift = ATA_SHIFT_PIO;
	42	dev->flags \|= ATA_DFLAG_PIO;
e852f705	43	ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
a20c9e82 PM	44	}
a20c9e82 PM	45	}
161c888b	46	return 0;
a20c9e82 PM	47	}
a20c9e82 PM	48
b9a3b4d1 OJ	49	static int ata_dummy_ret0(struct ata_port *ap) { return 0; }
b9a3b4d1 OJ	50
a20c9e82 PM	51	static struct scsi_host_template pata_platform_sht = {
	52	.module = THIS_MODULE,
	53	.name = DRV_NAME,
	54	.ioctl = ata_scsi_ioctl,
	55	.queuecommand = ata_scsi_queuecmd,
	56	.can_queue = ATA_DEF_QUEUE,
	57	.this_id = ATA_SHT_THIS_ID,
	58	.sg_tablesize = LIBATA_MAX_PRD,
a20c9e82 PM	59	.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
	60	.emulated = ATA_SHT_EMULATED,
	61	.use_clustering = ATA_SHT_USE_CLUSTERING,
	62	.proc_name = DRV_NAME,
	63	.dma_boundary = ATA_DMA_BOUNDARY,
	64	.slave_configure = ata_scsi_slave_config,
c972b60b	65	.slave_destroy = ata_scsi_slave_destroy,
a20c9e82 PM	66	.bios_param = ata_std_bios_param,
	67	};
	68
	69	static struct ata_port_operations pata_platform_port_ops = {
	70	.set_mode = pata_platform_set_mode,
	71
	72	.port_disable = ata_port_disable,
	73	.tf_load = ata_tf_load,
	74	.tf_read = ata_tf_read,
	75	.check_status = ata_check_status,
	76	.exec_command = ata_exec_command,
	77	.dev_select = ata_std_dev_select,
	78
	79	.freeze = ata_bmdma_freeze,
	80	.thaw = ata_bmdma_thaw,
	81	.error_handler = ata_bmdma_error_handler,
	82	.post_internal_cmd = ata_bmdma_post_internal_cmd,
570cb62d	83	.cable_detect = ata_cable_unknown,
a20c9e82 PM	84
	85	.qc_prep = ata_qc_prep,
	86	.qc_issue = ata_qc_issue_prot,
	87
0d5ff566	88	.data_xfer = ata_data_xfer_noirq,
a20c9e82	89
a20c9e82	90	.irq_clear = ata_bmdma_irq_clear,
246ce3b6 AI	91	.irq_on = ata_irq_on,
246ce3b6 AI	92	.irq_ack = ata_irq_ack,
a20c9e82	93
b9a3b4d1	94	.port_start = ata_dummy_ret0,
a20c9e82 PM	95	};
	96
	97	static void pata_platform_setup_port(struct ata_ioports *ioaddr,
	98	struct pata_platform_info *info)
	99	{
	100	unsigned int shift = 0;
	101
	102	/* Fixup the port shift for platforms that need it */
	103	if (info && info->ioport_shift)
	104	shift = info->ioport_shift;
	105
	106	ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << shift);
	107	ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << shift);
	108	ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift);
	109	ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << shift);
	110	ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << shift);
	111	ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << shift);
	112	ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << shift);
	113	ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << shift);
	114	ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << shift);
	115	ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << shift);
	116	}
	117
	118	/**
	119	* pata_platform_probe - attach a platform interface
	120	* @pdev: platform device
	121	*
	122	* Register a platform bus IDE interface. Such interfaces are PIO and we
	123	* assume do not support IRQ sharing.
	124	*
	125	* Platform devices are expected to contain 3 resources per port:
	126	*
	127	* - I/O Base (IORESOURCE_IO or IORESOURCE_MEM)
	128	* - CTL Base (IORESOURCE_IO or IORESOURCE_MEM)
	129	* - IRQ (IORESOURCE_IRQ)
	130	*
	131	* If the base resources are both mem types, the ioremap() is handled
	132	* here. For IORESOURCE_IO, it's assumed that there's no remapping
	133	* necessary.
	134	*/
	135	static int __devinit pata_platform_probe(struct platform_device *pdev)
	136	{
	137	struct resource io_res, ctl_res;
5d728824 TH	138	struct ata_host *host;
5d728824 TH	139	struct ata_port *ap;
5f45bc50	140	struct pata_platform_info *pp_info;
a20c9e82	141	unsigned int mmio;
a20c9e82 PM	142
	143	/*
	144	* Simple resource validation ..
	145	*/
	146	if (unlikely(pdev->num_resources != 3)) {
	147	dev_err(&pdev->dev, "invalid number of resources\n");
	148	return -EINVAL;
	149	}
	150
	151	/*
	152	* Get the I/O base first
	153	*/
	154	io_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	155	if (io_res == NULL) {
	156	io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	157	if (unlikely(io_res == NULL))
	158	return -EINVAL;
	159	}
	160
	161	/*
	162	* Then the CTL base
	163	*/
	164	ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1);
	165	if (ctl_res == NULL) {
	166	ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	167	if (unlikely(ctl_res == NULL))
	168	return -EINVAL;
	169	}
	170
	171	/*
	172	* Check for MMIO
	173	*/
	174	mmio = (( io_res->flags == IORESOURCE_MEM) &&
	175	(ctl_res->flags == IORESOURCE_MEM));
	176
	177	/*
	178	* Now that that's out of the way, wire up the port..
	179	*/
5d728824 TH	180	host = ata_host_alloc(&pdev->dev, 1);
	181	if (!host)
	182	return -ENOMEM;
	183	ap = host->ports[0];
	184
	185	ap->ops = &pata_platform_port_ops;
	186	ap->pio_mask = pio_mask;
	187	ap->flags \|= ATA_FLAG_SLAVE_POSS;
a20c9e82 PM	188
	189	/*
	190	* Handle the MMIO case
	191	*/
	192	if (mmio) {
5d728824	193	ap->ioaddr.cmd_addr = devm_ioremap(&pdev->dev, io_res->start,
0d5ff566	194	io_res->end - io_res->start + 1);
5d728824	195	ap->ioaddr.ctl_addr = devm_ioremap(&pdev->dev, ctl_res->start,
0d5ff566	196	ctl_res->end - ctl_res->start + 1);
a20c9e82	197	} else {
5d728824	198	ap->ioaddr.cmd_addr = devm_ioport_map(&pdev->dev, io_res->start,
0d5ff566	199	io_res->end - io_res->start + 1);
5d728824	200	ap->ioaddr.ctl_addr = devm_ioport_map(&pdev->dev, ctl_res->start,
0d5ff566 TH	201	ctl_res->end - ctl_res->start + 1);
0d5ff566 TH	202	}
5d728824	203	if (!ap->ioaddr.cmd_addr \|\| !ap->ioaddr.ctl_addr) {
0d5ff566 TH	204	dev_err(&pdev->dev, "failed to map IO/CTL base\n");
0d5ff566 TH	205	return -ENOMEM;
a20c9e82 PM	206	}
a20c9e82 PM	207
5d728824	208	ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;
a20c9e82	209
5f45bc50 SZ	210	pp_info = (struct pata_platform_info *)(pdev->dev.platform_data);
5f45bc50 SZ	211	pata_platform_setup_port(&ap->ioaddr, pp_info);
a20c9e82	212
5d728824	213	/* activate */
83b6839e MD	214	return ata_host_activate(host, platform_get_irq(pdev, 0),
	215	ata_interrupt, pp_info ? pp_info->irq_flags
	216	: 0, &pata_platform_sht);
a20c9e82 PM	217	}
	218
	219	/**
	220	* pata_platform_remove - unplug a platform interface
	221	* @pdev: platform device
	222	*
	223	* A platform bus ATA device has been unplugged. Perform the needed
	224	* cleanup. Also called on module unload for any active devices.
	225	*/
	226	static int __devexit pata_platform_remove(struct platform_device *pdev)
	227	{
	228	struct device *dev = &pdev->dev;
	229	struct ata_host *host = dev_get_drvdata(dev);
	230
1a68ff13	231	ata_host_detach(host);
a20c9e82 PM	232
	233	return 0;
	234	}
	235
	236	static struct platform_driver pata_platform_driver = {
	237	.probe = pata_platform_probe,
	238	.remove = __devexit_p(pata_platform_remove),
	239	.driver = {
	240	.name = DRV_NAME,
	241	.owner = THIS_MODULE,
	242	},
	243	};
	244
	245	static int __init pata_platform_init(void)
	246	{
	247	return platform_driver_register(&pata_platform_driver);
	248	}
	249
	250	static void __exit pata_platform_exit(void)
	251	{
	252	platform_driver_unregister(&pata_platform_driver);
	253	}
	254	module_init(pata_platform_init);
	255	module_exit(pata_platform_exit);
	256
	257	module_param(pio_mask, int, 0);
	258
	259	MODULE_AUTHOR("Paul Mundt");
	260	MODULE_DESCRIPTION("low-level driver for platform device ATA");
	261	MODULE_LICENSE("GPL");
	262	MODULE_VERSION(DRV_VERSION);