[net-next-2.6.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/kernel.h>
#include <linux/gfp.h>
#include <linux/module.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"

static int __init ahci_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct ahci_platform_data *pdata = dev->platform_data;
	struct ata_port_info pi = {
		.flags		= AHCI_FLAG_COMMON,
		.pio_mask	= ATA_PIO4,
		.udma_mask	= ATA_UDMA6,
		.port_ops	= &ahci_ops,
	};
	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->init) {
		rc = pdata->init(dev);
		if (rc)
			return rc;
	}

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

	hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
	if (!hpriv) {
		rc = -ENOMEM;
		goto err0;
	}

	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);
		rc = -ENOMEM;
		goto err0;
	}

	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 err0;
	}

	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 initial link pm policy */
		ap->pm_policy = NOT_AVAILABLE;

		/* 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 err0;

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

	rc = ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
			       &ahci_sht);
	if (rc)
		goto err0;

	return 0;
err0:
	if (pdata && pdata->exit)
		pdata->exit(dev);
	return rc;
}

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

	ata_host_detach(host);

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

	return 0;
}

static struct platform_driver ahci_driver = {
	.probe = ahci_probe,
	.remove = __devexit_p(ahci_remove),
	.driver = {
		.name = "ahci",
		.owner = THIS_MODULE,
	},
};

static int __init ahci_init(void)
{
	return platform_driver_probe(&ahci_driver, ahci_probe);
}
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
	15	#include <linux/kernel.h>
fbaf666b	16	#include <linux/gfp.h>
1c2a49f6 AV	17	#include <linux/module.h>
	18	#include <linux/init.h>
	19	#include <linux/interrupt.h>
	20	#include <linux/device.h>
	21	#include <linux/platform_device.h>
	22	#include <linux/libata.h>
	23	#include <linux/ahci_platform.h>
	24	#include "ahci.h"
	25
	26	static int __init ahci_probe(struct platform_device *pdev)
	27	{
	28	struct device *dev = &pdev->dev;
	29	struct ahci_platform_data *pdata = dev->platform_data;
	30	struct ata_port_info pi = {
	31	.flags = AHCI_FLAG_COMMON,
	32	.pio_mask = ATA_PIO4,
	33	.udma_mask = ATA_UDMA6,
	34	.port_ops = &ahci_ops,
	35	};
	36	const struct ata_port_info *ppi[] = { &pi, NULL };
	37	struct ahci_host_priv *hpriv;
	38	struct ata_host *host;
	39	struct resource *mem;
	40	int irq;
	41	int n_ports;
	42	int i;
	43	int rc;
	44
	45	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	46	if (!mem) {
	47	dev_err(dev, "no mmio space\n");
	48	return -EINVAL;
	49	}
	50
	51	irq = platform_get_irq(pdev, 0);
	52	if (irq <= 0) {
	53	dev_err(dev, "no irq\n");
	54	return -EINVAL;
	55	}
	56
	57	if (pdata && pdata->init) {
	58	rc = pdata->init(dev);
	59	if (rc)
	60	return rc;
	61	}
	62
	63	if (pdata && pdata->ata_port_info)
	64	pi = *pdata->ata_port_info;
	65
	66	hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
	67	if (!hpriv) {
	68	rc = -ENOMEM;
	69	goto err0;
	70	}
	71
	72	hpriv->flags \|= (unsigned long)pi.private_data;
	73
	74	hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem));
	75	if (!hpriv->mmio) {
	76	dev_err(dev, "can't map %pR\n", mem);
	77	rc = -ENOMEM;
	78	goto err0;
	79	}
	80
81	ahci_save_initial_config(dev, hpriv,
82	pdata ? pdata->force_port_map : 0,
83	pdata ? pdata->mask_port_map : 0);
84
85	/* prepare host */
86	if (hpriv->cap & HOST_CAP_NCQ)
87	pi.flags \|= ATA_FLAG_NCQ;
88
89	if (hpriv->cap & HOST_CAP_PMP)
90	pi.flags \|= ATA_FLAG_PMP;
91
92	ahci_set_em_messages(hpriv, &pi);
93
94	/* CAP.NP sometimes indicate the index of the last enabled
95	* port, at other times, that of the last possible port, so
96	* determining the maximum port number requires looking at
97	* both CAP.NP and port_map.
98	*/
99	n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
100
101	host = ata_host_alloc_pinfo(dev, ppi, n_ports);
102	if (!host) {
103	rc = -ENOMEM;
104	goto err0;
105	}
106
107	host->private_data = hpriv;
108
109	if (!(hpriv->cap & HOST_CAP_SSS) \|\| ahci_ignore_sss)
110	host->flags \|= ATA_HOST_PARALLEL_SCAN;
111	else
112	printk(KERN_INFO "ahci: SSS flag set, parallel bus scan disabled\n");
113
114	if (pi.flags & ATA_FLAG_EM)
115	ahci_reset_em(host);
116
117	for (i = 0; i < host->n_ports; i++) {
118	struct ata_port *ap = host->ports[i];
119
120	ata_port_desc(ap, "mmio %pR", mem);
121	ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);
122
123	/* set initial link pm policy */
124	ap->pm_policy = NOT_AVAILABLE;
125
126	/* set enclosure management message type */
127	if (ap->flags & ATA_FLAG_EM)
55787183	128	ap->em_message_type = hpriv->em_msg_type;
1c2a49f6 AV	129
	130	/* disabled/not-implemented port */
	131	if (!(hpriv->port_map & (1 << i)))
	132	ap->ops = &ata_dummy_port_ops;
	133	}
	134
	135	rc = ahci_reset_controller(host);
	136	if (rc)
	137	goto err0;
	138
	139	ahci_init_controller(host);
	140	ahci_print_info(host, "platform");
	141
	142	rc = ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
	143	&ahci_sht);
	144	if (rc)
	145	goto err0;
	146
	147	return 0;
	148	err0:
	149	if (pdata && pdata->exit)
	150	pdata->exit(dev);
	151	return rc;
	152	}
	153
	154	static int __devexit ahci_remove(struct platform_device *pdev)
	155	{
	156	struct device *dev = &pdev->dev;
	157	struct ahci_platform_data *pdata = dev->platform_data;
	158	struct ata_host *host = dev_get_drvdata(dev);
	159
	160	ata_host_detach(host);
	161
	162	if (pdata && pdata->exit)
	163	pdata->exit(dev);
	164
	165	return 0;
	166	}
	167
	168	static struct platform_driver ahci_driver = {
	169	.probe = ahci_probe,
	170	.remove = __devexit_p(ahci_remove),
	171	.driver = {
	172	.name = "ahci",
	173	.owner = THIS_MODULE,
	174	},
	175	};
	176
	177	static int __init ahci_init(void)
	178	{
	179	return platform_driver_probe(&ahci_driver, ahci_probe);
	180	}
	181	module_init(ahci_init);
	182
	183	static void __exit ahci_exit(void)
	184	{
	185	platform_driver_unregister(&ahci_driver);
	186	}
	187	module_exit(ahci_exit);
	188
	189	MODULE_DESCRIPTION("AHCI SATA platform driver");
	190	MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
	191	MODULE_LICENSE("GPL");
	192	MODULE_ALIAS("platform:ahci");