[linux-2.6-block.git] / drivers / usb / host / ohci-au1xxx.c

/*
 * OHCI HCD (Host Controller Driver) for USB.
 *
 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
 * (C) Copyright 2002 Hewlett-Packard Company
 *
 * Bus Glue for AMD Alchemy Au1xxx
 *
 * Written by Christopher Hoover <ch@hpl.hp.com>
 * Based on fragments of previous driver by Russell King et al.
 *
 * Modified for LH7A404 from ohci-sa1111.c
 *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
 * Modified for AMD Alchemy Au1xxx
 *  by Matt Porter <mporter@kernel.crashing.org>
 *
 * This file is licenced under the GPL.
 */

#include <linux/platform_device.h>
#include <linux/signal.h>

#include <asm/mach-au1x00/au1000.h>


extern int usb_disabled(void);

static int __devinit ohci_au1xxx_start(struct usb_hcd *hcd)
{
	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);
	int ret;

	ohci_dbg(ohci, "ohci_au1xxx_start, ohci:%p", ohci);

	if ((ret = ohci_init(ohci)) < 0)
		return ret;

	if ((ret = ohci_run(ohci)) < 0) {
		dev_err(hcd->self.controller, "can't start %s",
			hcd->self.bus_name);
		ohci_stop(hcd);
		return ret;
	}

	return 0;
}

static const struct hc_driver ohci_au1xxx_hc_driver = {
	.description =		hcd_name,
	.product_desc =		"Au1xxx OHCI",
	.hcd_priv_size =	sizeof(struct ohci_hcd),

	/*
	 * generic hardware linkage
	 */
	.irq =			ohci_irq,
	.flags =		HCD_USB11 | HCD_MEMORY,

	/*
	 * basic lifecycle operations
	 */
	.start =		ohci_au1xxx_start,
	.stop =			ohci_stop,
	.shutdown =		ohci_shutdown,

	/*
	 * managing i/o requests and associated device resources
	 */
	.urb_enqueue =		ohci_urb_enqueue,
	.urb_dequeue =		ohci_urb_dequeue,
	.endpoint_disable =	ohci_endpoint_disable,

	/*
	 * scheduling support
	 */
	.get_frame_number =	ohci_get_frame,

	/*
	 * root hub support
	 */
	.hub_status_data =	ohci_hub_status_data,
	.hub_control =		ohci_hub_control,
#ifdef	CONFIG_PM
	.bus_suspend =		ohci_bus_suspend,
	.bus_resume =		ohci_bus_resume,
#endif
	.start_port_reset =	ohci_start_port_reset,
};

static int ohci_hcd_au1xxx_drv_probe(struct platform_device *pdev)
{
	int ret, unit;
	struct usb_hcd *hcd;

	if (usb_disabled())
		return -ENODEV;

	if (pdev->resource[1].flags != IORESOURCE_IRQ) {
		pr_debug("resource[1] is not IORESOURCE_IRQ\n");
		return -ENOMEM;
	}

	hcd = usb_create_hcd(&ohci_au1xxx_hc_driver, &pdev->dev, "au1xxx");
	if (!hcd)
		return -ENOMEM;

	hcd->rsrc_start = pdev->resource[0].start;
	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
		pr_debug("request_mem_region failed\n");
		ret = -EBUSY;
		goto err1;
	}

	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs) {
		pr_debug("ioremap failed\n");
		ret = -ENOMEM;
		goto err2;
	}

	unit = (hcd->rsrc_start == AU1300_USB_OHCI1_PHYS_ADDR) ?
			ALCHEMY_USB_OHCI1 : ALCHEMY_USB_OHCI0;
	if (alchemy_usb_control(unit, 1)) {
		printk(KERN_INFO "%s: controller init failed!\n", pdev->name);
		ret = -ENODEV;
		goto err3;
	}

	ohci_hcd_init(hcd_to_ohci(hcd));

	ret = usb_add_hcd(hcd, pdev->resource[1].start,
			  IRQF_SHARED);
	if (ret == 0) {
		platform_set_drvdata(pdev, hcd);
		return ret;
	}

	alchemy_usb_control(unit, 0);
err3:
	iounmap(hcd->regs);
err2:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err1:
	usb_put_hcd(hcd);
	return ret;
}

static int ohci_hcd_au1xxx_drv_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	int unit;

	unit = (hcd->rsrc_start == AU1300_USB_OHCI1_PHYS_ADDR) ?
			ALCHEMY_USB_OHCI1 : ALCHEMY_USB_OHCI0;
	usb_remove_hcd(hcd);
	alchemy_usb_control(unit, 0);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
	platform_set_drvdata(pdev, NULL);

	return 0;
}

#ifdef CONFIG_PM
static int ohci_hcd_au1xxx_drv_suspend(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);
	unsigned long flags;
	int rc;

	rc = 0;

	/* Root hub was already suspended. Disable irq emission and
	 * mark HW unaccessible, bail out if RH has been resumed. Use
	 * the spinlock to properly synchronize with possible pending
	 * RH suspend or resume activity.
	 */
	spin_lock_irqsave(&ohci->lock, flags);
	if (ohci->rh_state != OHCI_RH_SUSPENDED) {
		rc = -EINVAL;
		goto bail;
	}
	ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
	(void)ohci_readl(ohci, &ohci->regs->intrdisable);

	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);

	alchemy_usb_control(ALCHEMY_USB_OHCI0, 0);
bail:
	spin_unlock_irqrestore(&ohci->lock, flags);

	return rc;
}

static int ohci_hcd_au1xxx_drv_resume(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);

	alchemy_usb_control(ALCHEMY_USB_OHCI0, 1);

	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
	ohci_finish_controller_resume(hcd);

	return 0;
}

static const struct dev_pm_ops au1xxx_ohci_pmops = {
	.suspend	= ohci_hcd_au1xxx_drv_suspend,
	.resume		= ohci_hcd_au1xxx_drv_resume,
};

#define AU1XXX_OHCI_PMOPS &au1xxx_ohci_pmops

#else
#define AU1XXX_OHCI_PMOPS NULL
#endif

static struct platform_driver ohci_hcd_au1xxx_driver = {
	.probe		= ohci_hcd_au1xxx_drv_probe,
	.remove		= ohci_hcd_au1xxx_drv_remove,
	.shutdown	= usb_hcd_platform_shutdown,
	.driver		= {
		.name	= "au1xxx-ohci",
		.owner	= THIS_MODULE,
		.pm	= AU1XXX_OHCI_PMOPS,
	},
};

MODULE_ALIAS("platform:au1xxx-ohci");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* OHCI HCD (Host Controller Driver) for USB.
	3	*
	4	* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
	5	* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
	6	* (C) Copyright 2002 Hewlett-Packard Company
	7	*
	8	* Bus Glue for AMD Alchemy Au1xxx
	9	*
	10	* Written by Christopher Hoover <ch@hpl.hp.com>
ac310bb5	11	* Based on fragments of previous driver by Russell King et al.
1da177e4 LT	12	*
	13	* Modified for LH7A404 from ohci-sa1111.c
	14	* by Durgesh Pattamatta <pattamattad@sharpsec.com>
	15	* Modified for AMD Alchemy Au1xxx
	16	* by Matt Porter <mporter@kernel.crashing.org>
	17	*
	18	* This file is licenced under the GPL.
	19	*/
	20
d052d1be	21	#include <linux/platform_device.h>
de25968c	22	#include <linux/signal.h>
d052d1be	23
1da177e4 LT	24	#include <asm/mach-au1x00/au1000.h>
1da177e4 LT	25
d5fb7f1b	26
1da177e4 LT	27	extern int usb_disabled(void);
1da177e4 LT	28
53c81a34	29	static int __devinit ohci_au1xxx_start(struct usb_hcd *hcd)
1da177e4	30	{
53c81a34 ML	31	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
53c81a34 ML	32	int ret;
1da177e4	33
53c81a34	34	ohci_dbg(ohci, "ohci_au1xxx_start, ohci:%p", ohci);
1da177e4	35
53c81a34	36	if ((ret = ohci_init(ohci)) < 0)
1da177e4 LT	37	return ret;
1da177e4 LT	38
53c81a34	39	if ((ret = ohci_run(ohci)) < 0) {
3b1f1ad6 PG	40	dev_err(hcd->self.controller, "can't start %s",
3b1f1ad6 PG	41	hcd->self.bus_name);
53c81a34	42	ohci_stop(hcd);
1da177e4 LT	43	return ret;
	44	}
	45
	46	return 0;
	47	}
	48
1da177e4 LT	49	static const struct hc_driver ohci_au1xxx_hc_driver = {
	50	.description = hcd_name,
	51	.product_desc = "Au1xxx OHCI",
	52	.hcd_priv_size = sizeof(struct ohci_hcd),
	53
	54	/*
	55	* generic hardware linkage
	56	*/
	57	.irq = ohci_irq,
	58	.flags = HCD_USB11 \| HCD_MEMORY,
	59
	60	/*
	61	* basic lifecycle operations
	62	*/
	63	.start = ohci_au1xxx_start,
1da177e4	64	.stop = ohci_stop,
dd9048af	65	.shutdown = ohci_shutdown,
1da177e4 LT	66
	67	/*
	68	* managing i/o requests and associated device resources
	69	*/
	70	.urb_enqueue = ohci_urb_enqueue,
	71	.urb_dequeue = ohci_urb_dequeue,
	72	.endpoint_disable = ohci_endpoint_disable,
	73
	74	/*
	75	* scheduling support
	76	*/
	77	.get_frame_number = ohci_get_frame,
	78
	79	/*
	80	* root hub support
	81	*/
	82	.hub_status_data = ohci_hub_status_data,
	83	.hub_control = ohci_hub_control,
9293677a	84	#ifdef CONFIG_PM
0c0382e3 AS	85	.bus_suspend = ohci_bus_suspend,
0c0382e3 AS	86	.bus_resume = ohci_bus_resume,
9293677a DB	87	#endif
9293677a DB	88	.start_port_reset = ohci_start_port_reset,
1da177e4 LT	89	};
1da177e4 LT	90
3ae5eaec	91	static int ohci_hcd_au1xxx_drv_probe(struct platform_device *pdev)
1da177e4	92	{
809f36c6	93	int ret, unit;
53c81a34	94	struct usb_hcd *hcd;
1da177e4 LT	95
	96	if (usb_disabled())
	97	return -ENODEV;
	98
53c81a34 ML	99	if (pdev->resource[1].flags != IORESOURCE_IRQ) {
	100	pr_debug("resource[1] is not IORESOURCE_IRQ\n");
	101	return -ENOMEM;
	102	}
	103
	104	hcd = usb_create_hcd(&ohci_au1xxx_hc_driver, &pdev->dev, "au1xxx");
	105	if (!hcd)
	106	return -ENOMEM;
	107
	108	hcd->rsrc_start = pdev->resource[0].start;
	109	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
	110
	111	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
	112	pr_debug("request_mem_region failed\n");
	113	ret = -EBUSY;
	114	goto err1;
	115	}
	116
	117	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	118	if (!hcd->regs) {
	119	pr_debug("ioremap failed\n");
	120	ret = -ENOMEM;
	121	goto err2;
	122	}
	123
809f36c6 ML	124	unit = (hcd->rsrc_start == AU1300_USB_OHCI1_PHYS_ADDR) ?
	125	ALCHEMY_USB_OHCI1 : ALCHEMY_USB_OHCI0;
	126	if (alchemy_usb_control(unit, 1)) {
ce6bc922 ML	127	printk(KERN_INFO "%s: controller init failed!\n", pdev->name);
	128	ret = -ENODEV;
	129	goto err3;
	130	}
	131
53c81a34 ML	132	ohci_hcd_init(hcd_to_ohci(hcd));
	133
	134	ret = usb_add_hcd(hcd, pdev->resource[1].start,
b5dd18d8	135	IRQF_SHARED);
53c81a34 ML	136	if (ret == 0) {
	137	platform_set_drvdata(pdev, hcd);
	138	return ret;
	139	}
	140
809f36c6	141	alchemy_usb_control(unit, 0);
ce6bc922	142	err3:
53c81a34 ML	143	iounmap(hcd->regs);
	144	err2:
	145	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	146	err1:
	147	usb_put_hcd(hcd);
1da177e4 LT	148	return ret;
	149	}
	150
3ae5eaec	151	static int ohci_hcd_au1xxx_drv_remove(struct platform_device *pdev)
1da177e4	152	{
3ae5eaec	153	struct usb_hcd *hcd = platform_get_drvdata(pdev);
809f36c6	154	int unit;
1da177e4	155
809f36c6 ML	156	unit = (hcd->rsrc_start == AU1300_USB_OHCI1_PHYS_ADDR) ?
809f36c6 ML	157	ALCHEMY_USB_OHCI1 : ALCHEMY_USB_OHCI0;
53c81a34	158	usb_remove_hcd(hcd);
809f36c6	159	alchemy_usb_control(unit, 0);
53c81a34 ML	160	iounmap(hcd->regs);
	161	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	162	usb_put_hcd(hcd);
	163	platform_set_drvdata(pdev, NULL);
	164
1da177e4 LT	165	return 0;
1da177e4 LT	166	}
53c81a34	167
42bfc7b4	168	#ifdef CONFIG_PM
807fcb5e	169	static int ohci_hcd_au1xxx_drv_suspend(struct device *dev)
1da177e4	170	{
807fcb5e	171	struct usb_hcd *hcd = dev_get_drvdata(dev);
42bfc7b4 ML	172	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	173	unsigned long flags;
	174	int rc;
	175
	176	rc = 0;
	177
	178	/* Root hub was already suspended. Disable irq emission and
	179	* mark HW unaccessible, bail out if RH has been resumed. Use
	180	* the spinlock to properly synchronize with possible pending
	181	* RH suspend or resume activity.
42bfc7b4 ML	182	*/
42bfc7b4 ML	183	spin_lock_irqsave(&ohci->lock, flags);
b7463c71	184	if (ohci->rh_state != OHCI_RH_SUSPENDED) {
42bfc7b4 ML	185	rc = -EINVAL;
	186	goto bail;
	187	}
	188	ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
	189	(void)ohci_readl(ohci, &ohci->regs->intrdisable);
1da177e4	190
42bfc7b4 ML	191	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
42bfc7b4 ML	192
ce6bc922	193	alchemy_usb_control(ALCHEMY_USB_OHCI0, 0);
42bfc7b4 ML	194	bail:
	195	spin_unlock_irqrestore(&ohci->lock, flags);
	196
	197	return rc;
1da177e4	198	}
42bfc7b4	199
807fcb5e	200	static int ohci_hcd_au1xxx_drv_resume(struct device *dev)
1da177e4	201	{
807fcb5e	202	struct usb_hcd *hcd = dev_get_drvdata(dev);
42bfc7b4	203
ce6bc922	204	alchemy_usb_control(ALCHEMY_USB_OHCI0, 1);
42bfc7b4 ML	205
	206	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
	207	ohci_finish_controller_resume(hcd);
1da177e4 LT	208
	209	return 0;
	210	}
807fcb5e	211
47145210	212	static const struct dev_pm_ops au1xxx_ohci_pmops = {
807fcb5e ML	213	.suspend = ohci_hcd_au1xxx_drv_suspend,
	214	.resume = ohci_hcd_au1xxx_drv_resume,
	215	};
	216
	217	#define AU1XXX_OHCI_PMOPS &au1xxx_ohci_pmops
	218
42bfc7b4	219	#else
807fcb5e	220	#define AU1XXX_OHCI_PMOPS NULL
42bfc7b4	221	#endif
1da177e4	222
3ae5eaec	223	static struct platform_driver ohci_hcd_au1xxx_driver = {
1da177e4 LT	224	.probe = ohci_hcd_au1xxx_drv_probe,
1da177e4 LT	225	.remove = ohci_hcd_au1xxx_drv_remove,
dd9048af	226	.shutdown = usb_hcd_platform_shutdown,
3ae5eaec RK	227	.driver = {
	228	.name = "au1xxx-ohci",
	229	.owner = THIS_MODULE,
807fcb5e	230	.pm = AU1XXX_OHCI_PMOPS,
3ae5eaec	231	},
1da177e4 LT	232	};
1da177e4 LT	233
f4fce61d	234	MODULE_ALIAS("platform:au1xxx-ohci");