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

/*
 * AHCI SATA platform driver
 *
 * Copyright 2004-2005  Red Hat, Inc.
 *   Jeff Garzik <jgarzik@pobox.com>
 * Copyright 2010  MontaVista Software, LLC.
 *   Anton Vorontsov <avorontsov@ru.mvista.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 */

#include <linux/clk.h>
#include <linux/kernel.h>
#include <linux/gfp.h>
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/libata.h>
#include <linux/ahci_platform.h>
#include "ahci.h"

enum ahci_type {
	AHCI,		/* standard platform ahci */
	IMX53_AHCI,	/* ahci on i.mx53 */
	STRICT_AHCI,	/* delayed DMA engine start */
};

static struct platform_device_id ahci_devtype[] = {
	{
		.name = "ahci",
		.driver_data = AHCI,
	}, {
		.name = "imx53-ahci",
		.driver_data = IMX53_AHCI,
	}, {
		.name = "strict-ahci",
		.driver_data = STRICT_AHCI,
	}, {
		/* sentinel */
	}
};
MODULE_DEVICE_TABLE(platform, ahci_devtype);


static const struct ata_port_info ahci_port_info[] = {
	/* by features */
	[AHCI] = {
		.flags		= AHCI_FLAG_COMMON,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_ops,
	},
	[IMX53_AHCI] = {
		.flags		= AHCI_FLAG_COMMON,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_pmp_retry_srst_ops,
	},
	[STRICT_AHCI] = {
		AHCI_HFLAGS	(AHCI_HFLAG_DELAY_ENGINE),
		.flags		= AHCI_FLAG_COMMON,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_ops,
	},
};

static struct scsi_host_template ahci_platform_sht = {
	AHCI_SHT("ahci_platform"),
};

static int __devinit ahci_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct ahci_platform_data *pdata = dev_get_platdata(dev);
	const struct platform_device_id *id = platform_get_device_id(pdev);
	struct ata_port_info pi = ahci_port_info[id ? id->driver_data : 0];
	const struct ata_port_info *ppi[] = { &pi, NULL };
	struct ahci_host_priv *hpriv;
	struct ata_host *host;
	struct resource *mem;
	int irq;
	int n_ports;
	int i;
	int rc;

	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!mem) {
		dev_err(dev, "no mmio space\n");
		return -EINVAL;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq <= 0) {
		dev_err(dev, "no irq\n");
		return -EINVAL;
	}

	if (pdata && pdata->ata_port_info)
		pi = *pdata->ata_port_info;

	hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
	if (!hpriv) {
		dev_err(dev, "can't alloc ahci_host_priv\n");
		return -ENOMEM;
	}

	hpriv->flags |= (unsigned long)pi.private_data;

	hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem));
	if (!hpriv->mmio) {
		dev_err(dev, "can't map %pR\n", mem);
		return -ENOMEM;
	}

	hpriv->clk = clk_get(dev, NULL);
	if (IS_ERR(hpriv->clk)) {
		dev_err(dev, "can't get clock\n");
	} else {
		rc = clk_prepare_enable(hpriv->clk);
		if (rc) {
			dev_err(dev, "clock prepare enable failed");
			goto free_clk;
		}
	}

	/*
	 * Some platforms might need to prepare for mmio region access,
	 * which could be done in the following init call. So, the mmio
	 * region shouldn't be accessed before init (if provided) has
	 * returned successfully.
	 */
	if (pdata && pdata->init) {
		rc = pdata->init(dev, hpriv->mmio);
		if (rc)
			goto disable_unprepare_clk;
	}

	ahci_save_initial_config(dev, hpriv,
		pdata ? pdata->force_port_map : 0,
		pdata ? pdata->mask_port_map  : 0);

	/* prepare host */
	if (hpriv->cap & HOST_CAP_NCQ)
		pi.flags |= ATA_FLAG_NCQ;

	if (hpriv->cap & HOST_CAP_PMP)
		pi.flags |= ATA_FLAG_PMP;

	ahci_set_em_messages(hpriv, &pi);

	/* CAP.NP sometimes indicate the index of the last enabled
	 * port, at other times, that of the last possible port, so
	 * determining the maximum port number requires looking at
	 * both CAP.NP and port_map.
	 */
	n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));

	host = ata_host_alloc_pinfo(dev, ppi, n_ports);
	if (!host) {
		rc = -ENOMEM;
		goto pdata_exit;
	}

	host->private_data = hpriv;

	if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)
		host->flags |= ATA_HOST_PARALLEL_SCAN;
	else
		printk(KERN_INFO "ahci: SSS flag set, parallel bus scan disabled\n");

	if (pi.flags & ATA_FLAG_EM)
		ahci_reset_em(host);

	for (i = 0; i < host->n_ports; i++) {
		struct ata_port *ap = host->ports[i];

		ata_port_desc(ap, "mmio %pR", mem);
		ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);

		/* set enclosure management message type */
		if (ap->flags & ATA_FLAG_EM)
			ap->em_message_type = hpriv->em_msg_type;

		/* disabled/not-implemented port */
		if (!(hpriv->port_map & (1 << i)))
			ap->ops = &ata_dummy_port_ops;
	}

	rc = ahci_reset_controller(host);
	if (rc)
		goto pdata_exit;

	ahci_init_controller(host);
	ahci_print_info(host, "platform");

	rc = ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
			       &ahci_platform_sht);
	if (rc)
		goto pdata_exit;

	return 0;
pdata_exit:
	if (pdata && pdata->exit)
		pdata->exit(dev);
disable_unprepare_clk:
	if (!IS_ERR(hpriv->clk))
		clk_disable_unprepare(hpriv->clk);
free_clk:
	if (!IS_ERR(hpriv->clk))
		clk_put(hpriv->clk);
	return rc;
}

static int __devexit ahci_remove(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct ahci_platform_data *pdata = dev_get_platdata(dev);
	struct ata_host *host = dev_get_drvdata(dev);
	struct ahci_host_priv *hpriv = host->private_data;

	ata_host_detach(host);

	if (pdata && pdata->exit)
		pdata->exit(dev);

	if (!IS_ERR(hpriv->clk)) {
		clk_disable_unprepare(hpriv->clk);
		clk_put(hpriv->clk);
	}

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int ahci_suspend(struct device *dev)
{
	struct ahci_platform_data *pdata = dev_get_platdata(dev);
	struct ata_host *host = dev_get_drvdata(dev);
	struct ahci_host_priv *hpriv = host->private_data;
	void __iomem *mmio = hpriv->mmio;
	u32 ctl;
	int rc;

	if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
		dev_err(dev, "firmware update required for suspend/resume\n");
		return -EIO;
	}

	/*
	 * AHCI spec rev1.1 section 8.3.3:
	 * Software must disable interrupts prior to requesting a
	 * transition of the HBA to D3 state.
	 */
	ctl = readl(mmio + HOST_CTL);
	ctl &= ~HOST_IRQ_EN;
	writel(ctl, mmio + HOST_CTL);
	readl(mmio + HOST_CTL); /* flush */

	rc = ata_host_suspend(host, PMSG_SUSPEND);
	if (rc)
		return rc;

	if (pdata && pdata->suspend)
		return pdata->suspend(dev);

	if (!IS_ERR(hpriv->clk))
		clk_disable_unprepare(hpriv->clk);

	return 0;
}

static int ahci_resume(struct device *dev)
{
	struct ahci_platform_data *pdata = dev_get_platdata(dev);
	struct ata_host *host = dev_get_drvdata(dev);
	struct ahci_host_priv *hpriv = host->private_data;
	int rc;

	if (!IS_ERR(hpriv->clk)) {
		rc = clk_prepare_enable(hpriv->clk);
		if (rc) {
			dev_err(dev, "clock prepare enable failed");
			return rc;
		}
	}

	if (pdata && pdata->resume) {
		rc = pdata->resume(dev);
		if (rc)
			goto disable_unprepare_clk;
	}

	if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
		rc = ahci_reset_controller(host);
		if (rc)
			goto disable_unprepare_clk;

		ahci_init_controller(host);
	}

	ata_host_resume(host);

	return 0;

disable_unprepare_clk:
	if (!IS_ERR(hpriv->clk))
		clk_disable_unprepare(hpriv->clk);

	return rc;
}
#endif

SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_suspend, ahci_resume);

static const struct of_device_id ahci_of_match[] = {
	{ .compatible = "snps,spear-ahci", },
	{},
};
MODULE_DEVICE_TABLE(of, ahci_of_match);

static struct platform_driver ahci_driver = {
	.probe = ahci_probe,
	.remove = __devexit_p(ahci_remove),
	.driver = {
		.name = "ahci",
		.owner = THIS_MODULE,
		.of_match_table = ahci_of_match,
		.pm = &ahci_pm_ops,
	},
	.id_table	= ahci_devtype,
};

static int __init ahci_init(void)
{
	return platform_driver_register(&ahci_driver);
}
module_init(ahci_init);

static void __exit ahci_exit(void)
{
	platform_driver_unregister(&ahci_driver);
}
module_exit(ahci_exit);

MODULE_DESCRIPTION("AHCI SATA platform driver");
MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:ahci");
Commit	Line	Data
1c2a49f6 AV	1	/*
	2	* AHCI SATA platform driver
	3	*
	4	* Copyright 2004-2005 Red Hat, Inc.
	5	* Jeff Garzik <jgarzik@pobox.com>
	6	* Copyright 2010 MontaVista Software, LLC.
	7	* Anton Vorontsov <avorontsov@ru.mvista.com>
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2, or (at your option)
	12	* any later version.
	13	*/
	14
f1e70c2c	15	#include <linux/clk.h>
1c2a49f6	16	#include <linux/kernel.h>
fbaf666b	17	#include <linux/gfp.h>
1c2a49f6	18	#include <linux/module.h>
18c25ff4	19	#include <linux/pm.h>
1c2a49f6 AV	20	#include <linux/init.h>
	21	#include <linux/interrupt.h>
	22	#include <linux/device.h>
	23	#include <linux/platform_device.h>
	24	#include <linux/libata.h>
	25	#include <linux/ahci_platform.h>
	26	#include "ahci.h"
	27
904c04fe RZ	28	enum ahci_type {
	29	AHCI, /* standard platform ahci */
	30	IMX53_AHCI, /* ahci on i.mx53 */
d408e2b1	31	STRICT_AHCI, /* delayed DMA engine start */
904c04fe RZ	32	};
	33
	34	static struct platform_device_id ahci_devtype[] = {
	35	{
	36	.name = "ahci",
	37	.driver_data = AHCI,
	38	}, {
	39	.name = "imx53-ahci",
	40	.driver_data = IMX53_AHCI,
d408e2b1 BN	41	}, {
	42	.name = "strict-ahci",
	43	.driver_data = STRICT_AHCI,
904c04fe RZ	44	}, {
	45	/* sentinel */
	46	}
	47	};
	48	MODULE_DEVICE_TABLE(platform, ahci_devtype);
	49
	50
	51	static const struct ata_port_info ahci_port_info[] = {
	52	/* by features */
	53	[AHCI] = {
	54	.flags = AHCI_FLAG_COMMON,
	55	.pio_mask = ATA_PIO4,
	56	.udma_mask = ATA_UDMA6,
	57	.port_ops = &ahci_ops,
	58	},
	59	[IMX53_AHCI] = {
	60	.flags = AHCI_FLAG_COMMON,
	61	.pio_mask = ATA_PIO4,
	62	.udma_mask = ATA_UDMA6,
	63	.port_ops = &ahci_pmp_retry_srst_ops,
	64	},
d408e2b1 BN	65	[STRICT_AHCI] = {
	66	AHCI_HFLAGS (AHCI_HFLAG_DELAY_ENGINE),
	67	.flags = AHCI_FLAG_COMMON,
	68	.pio_mask = ATA_PIO4,
	69	.udma_mask = ATA_UDMA6,
	70	.port_ops = &ahci_ops,
	71	},
904c04fe RZ	72	};
904c04fe RZ	73
fad16e7a TH	74	static struct scsi_host_template ahci_platform_sht = {
	75	AHCI_SHT("ahci_platform"),
	76	};
	77
941c77fd	78	static int __devinit ahci_probe(struct platform_device *pdev)
1c2a49f6 AV	79	{
1c2a49f6 AV	80	struct device *dev = &pdev->dev;
00345614	81	struct ahci_platform_data *pdata = dev_get_platdata(dev);
904c04fe	82	const struct platform_device_id *id = platform_get_device_id(pdev);
ff956135	83	struct ata_port_info pi = ahci_port_info[id ? id->driver_data : 0];
1c2a49f6 AV	84	const struct ata_port_info *ppi[] = { &pi, NULL };
	85	struct ahci_host_priv *hpriv;
	86	struct ata_host *host;
	87	struct resource *mem;
	88	int irq;
	89	int n_ports;
	90	int i;
	91	int rc;
	92
	93	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	94	if (!mem) {
	95	dev_err(dev, "no mmio space\n");
	96	return -EINVAL;
	97	}
	98
	99	irq = platform_get_irq(pdev, 0);
	100	if (irq <= 0) {
	101	dev_err(dev, "no irq\n");
	102	return -EINVAL;
	103	}
	104
1c2a49f6 AV	105	if (pdata && pdata->ata_port_info)
	106	pi = *pdata->ata_port_info;
	107
	108	hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
	109	if (!hpriv) {
08354809 JB	110	dev_err(dev, "can't alloc ahci_host_priv\n");
08354809 JB	111	return -ENOMEM;
1c2a49f6 AV	112	}
	113
	114	hpriv->flags \|= (unsigned long)pi.private_data;
	115
	116	hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem));
	117	if (!hpriv->mmio) {
	118	dev_err(dev, "can't map %pR\n", mem);
08354809 JB	119	return -ENOMEM;
	120	}
	121
f1e70c2c VK	122	hpriv->clk = clk_get(dev, NULL);
	123	if (IS_ERR(hpriv->clk)) {
	124	dev_err(dev, "can't get clock\n");
	125	} else {
	126	rc = clk_prepare_enable(hpriv->clk);
	127	if (rc) {
	128	dev_err(dev, "clock prepare enable failed");
	129	goto free_clk;
	130	}
	131	}
	132
08354809 JB	133	/*
	134	* Some platforms might need to prepare for mmio region access,
	135	* which could be done in the following init call. So, the mmio
	136	* region shouldn't be accessed before init (if provided) has
	137	* returned successfully.
	138	*/
	139	if (pdata && pdata->init) {
	140	rc = pdata->init(dev, hpriv->mmio);
	141	if (rc)
f1e70c2c	142	goto disable_unprepare_clk;
1c2a49f6 AV	143	}
	144
	145	ahci_save_initial_config(dev, hpriv,
	146	pdata ? pdata->force_port_map : 0,
	147	pdata ? pdata->mask_port_map : 0);
	148
	149	/* prepare host */
	150	if (hpriv->cap & HOST_CAP_NCQ)
	151	pi.flags \|= ATA_FLAG_NCQ;
	152
	153	if (hpriv->cap & HOST_CAP_PMP)
	154	pi.flags \|= ATA_FLAG_PMP;
	155
	156	ahci_set_em_messages(hpriv, &pi);
	157
	158	/* CAP.NP sometimes indicate the index of the last enabled
	159	* port, at other times, that of the last possible port, so
	160	* determining the maximum port number requires looking at
	161	* both CAP.NP and port_map.
	162	*/
	163	n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
	164
	165	host = ata_host_alloc_pinfo(dev, ppi, n_ports);
	166	if (!host) {
	167	rc = -ENOMEM;
f1e70c2c	168	goto pdata_exit;
1c2a49f6 AV	169	}
	170
	171	host->private_data = hpriv;
	172
	173	if (!(hpriv->cap & HOST_CAP_SSS) \|\| ahci_ignore_sss)
	174	host->flags \|= ATA_HOST_PARALLEL_SCAN;
	175	else
	176	printk(KERN_INFO "ahci: SSS flag set, parallel bus scan disabled\n");
	177
	178	if (pi.flags & ATA_FLAG_EM)
	179	ahci_reset_em(host);
	180
	181	for (i = 0; i < host->n_ports; i++) {
	182	struct ata_port *ap = host->ports[i];
	183
	184	ata_port_desc(ap, "mmio %pR", mem);
	185	ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);
	186
1c2a49f6 AV	187	/* set enclosure management message type */
1c2a49f6 AV	188	if (ap->flags & ATA_FLAG_EM)
55787183	189	ap->em_message_type = hpriv->em_msg_type;
1c2a49f6 AV	190
	191	/* disabled/not-implemented port */
	192	if (!(hpriv->port_map & (1 << i)))
	193	ap->ops = &ata_dummy_port_ops;
	194	}
	195
	196	rc = ahci_reset_controller(host);
	197	if (rc)
f1e70c2c	198	goto pdata_exit;
1c2a49f6 AV	199
	200	ahci_init_controller(host);
	201	ahci_print_info(host, "platform");
	202
	203	rc = ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
fad16e7a	204	&ahci_platform_sht);
1c2a49f6	205	if (rc)
f1e70c2c	206	goto pdata_exit;
1c2a49f6 AV	207
1c2a49f6 AV	208	return 0;
f1e70c2c	209	pdata_exit:
1c2a49f6 AV	210	if (pdata && pdata->exit)
1c2a49f6 AV	211	pdata->exit(dev);
f1e70c2c VK	212	disable_unprepare_clk:
	213	if (!IS_ERR(hpriv->clk))
	214	clk_disable_unprepare(hpriv->clk);
	215	free_clk:
	216	if (!IS_ERR(hpriv->clk))
	217	clk_put(hpriv->clk);
1c2a49f6 AV	218	return rc;
	219	}
	220
	221	static int __devexit ahci_remove(struct platform_device *pdev)
	222	{
	223	struct device *dev = &pdev->dev;
00345614	224	struct ahci_platform_data *pdata = dev_get_platdata(dev);
1c2a49f6	225	struct ata_host *host = dev_get_drvdata(dev);
f1e70c2c	226	struct ahci_host_priv *hpriv = host->private_data;
1c2a49f6 AV	227
	228	ata_host_detach(host);
	229
	230	if (pdata && pdata->exit)
	231	pdata->exit(dev);
	232
f1e70c2c VK	233	if (!IS_ERR(hpriv->clk)) {
	234	clk_disable_unprepare(hpriv->clk);
	235	clk_put(hpriv->clk);
	236	}
	237
1c2a49f6 AV	238	return 0;
	239	}
	240
29448ec1	241	#ifdef CONFIG_PM_SLEEP
17ab594f BN	242	static int ahci_suspend(struct device *dev)
	243	{
	244	struct ahci_platform_data *pdata = dev_get_platdata(dev);
	245	struct ata_host *host = dev_get_drvdata(dev);
	246	struct ahci_host_priv *hpriv = host->private_data;
	247	void __iomem *mmio = hpriv->mmio;
	248	u32 ctl;
	249	int rc;
	250
	251	if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
	252	dev_err(dev, "firmware update required for suspend/resume\n");
	253	return -EIO;
	254	}
	255
	256	/*
	257	* AHCI spec rev1.1 section 8.3.3:
	258	* Software must disable interrupts prior to requesting a
	259	* transition of the HBA to D3 state.
	260	*/
	261	ctl = readl(mmio + HOST_CTL);
	262	ctl &= ~HOST_IRQ_EN;
	263	writel(ctl, mmio + HOST_CTL);
	264	readl(mmio + HOST_CTL); /* flush */
	265
	266	rc = ata_host_suspend(host, PMSG_SUSPEND);
	267	if (rc)
	268	return rc;
	269
	270	if (pdata && pdata->suspend)
	271	return pdata->suspend(dev);
f1e70c2c VK	272
	273	if (!IS_ERR(hpriv->clk))
	274	clk_disable_unprepare(hpriv->clk);
	275
17ab594f BN	276	return 0;
	277	}
	278
	279	static int ahci_resume(struct device *dev)
	280	{
	281	struct ahci_platform_data *pdata = dev_get_platdata(dev);
	282	struct ata_host *host = dev_get_drvdata(dev);
f1e70c2c	283	struct ahci_host_priv *hpriv = host->private_data;
17ab594f BN	284	int rc;
17ab594f BN	285
f1e70c2c VK	286	if (!IS_ERR(hpriv->clk)) {
	287	rc = clk_prepare_enable(hpriv->clk);
	288	if (rc) {
	289	dev_err(dev, "clock prepare enable failed");
	290	return rc;
	291	}
	292	}
	293
17ab594f BN	294	if (pdata && pdata->resume) {
	295	rc = pdata->resume(dev);
	296	if (rc)
f1e70c2c	297	goto disable_unprepare_clk;
17ab594f BN	298	}
	299
	300	if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
	301	rc = ahci_reset_controller(host);
	302	if (rc)
f1e70c2c	303	goto disable_unprepare_clk;
17ab594f BN	304
	305	ahci_init_controller(host);
	306	}
	307
	308	ata_host_resume(host);
	309
	310	return 0;
f1e70c2c VK	311
	312	disable_unprepare_clk:
	313	if (!IS_ERR(hpriv->clk))
	314	clk_disable_unprepare(hpriv->clk);
	315
	316	return rc;
17ab594f	317	}
17ab594f BN	318	#endif
17ab594f BN	319
18c25ff4 SH	320	SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_suspend, ahci_resume);
18c25ff4 SH	321
02aac316	322	static const struct of_device_id ahci_of_match[] = {
5f098a3e	323	{ .compatible = "snps,spear-ahci", },
02aac316 RH	324	{},
	325	};
	326	MODULE_DEVICE_TABLE(of, ahci_of_match);
	327
1c2a49f6	328	static struct platform_driver ahci_driver = {
941c77fd	329	.probe = ahci_probe,
1c2a49f6 AV	330	.remove = __devexit_p(ahci_remove),
	331	.driver = {
	332	.name = "ahci",
	333	.owner = THIS_MODULE,
02aac316	334	.of_match_table = ahci_of_match,
17ab594f	335	.pm = &ahci_pm_ops,
1c2a49f6	336	},
904c04fe	337	.id_table = ahci_devtype,
1c2a49f6 AV	338	};
	339
	340	static int __init ahci_init(void)
	341	{
941c77fd	342	return platform_driver_register(&ahci_driver);
1c2a49f6 AV	343	}
	344	module_init(ahci_init);
	345
	346	static void __exit ahci_exit(void)
	347	{
	348	platform_driver_unregister(&ahci_driver);
	349	}
	350	module_exit(ahci_exit);
	351
	352	MODULE_DESCRIPTION("AHCI SATA platform driver");
	353	MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
	354	MODULE_LICENSE("GPL");
	355	MODULE_ALIAS("platform:ahci");