[deliverable/linux.git] / drivers / usb / host / ohci-lh7a404.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 Sharp LH7A404
 *
 * 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>
 *
 * This file is licenced under the GPL.
 */

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

#include <mach/hardware.h>


extern int usb_disabled(void);

/*-------------------------------------------------------------------------*/

static void lh7a404_start_hc(struct platform_device *dev)
{
	printk(KERN_DEBUG "%s: starting LH7A404 OHCI USB Controller\n",
	       __FILE__);

	/*
	 * Now, carefully enable the USB clock, and take
	 * the USB host controller out of reset.
	 */
	CSC_PWRCNT |= CSC_PWRCNT_USBH_EN; /* Enable clock */
	udelay(1000);
	USBH_CMDSTATUS = OHCI_HCR;

	printk(KERN_DEBUG "%s: Clock to USB host has been enabled \n", __FILE__);
}

static void lh7a404_stop_hc(struct platform_device *dev)
{
	printk(KERN_DEBUG "%s: stopping LH7A404 OHCI USB Controller\n",
	       __FILE__);

	CSC_PWRCNT &= ~CSC_PWRCNT_USBH_EN; /* Disable clock */
}


/*-------------------------------------------------------------------------*/

/* configure so an HC device and id are always provided */
/* always called with process context; sleeping is OK */


/**
 * usb_hcd_lh7a404_probe - initialize LH7A404-based HCDs
 * Context: !in_interrupt()
 *
 * Allocates basic resources for this USB host controller, and
 * then invokes the start() method for the HCD associated with it
 * through the hotplug entry's driver_data.
 *
 */
int usb_hcd_lh7a404_probe (const struct hc_driver *driver,
			  struct platform_device *dev)
{
	int retval;
	struct usb_hcd *hcd;

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

	hcd = usb_create_hcd(driver, &dev->dev, "lh7a404");
	if (!hcd)
		return -ENOMEM;
	hcd->rsrc_start = dev->resource[0].start;
	hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;

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

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

	lh7a404_start_hc(dev);
	ohci_hcd_init(hcd_to_ohci(hcd));

	retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED);
	if (retval == 0)
		return retval;

	lh7a404_stop_hc(dev);
	iounmap(hcd->regs);
 err2:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 err1:
	usb_put_hcd(hcd);
	return retval;
}


/* may be called without controller electrically present */
/* may be called with controller, bus, and devices active */

/**
 * usb_hcd_lh7a404_remove - shutdown processing for LH7A404-based HCDs
 * @dev: USB Host Controller being removed
 * Context: !in_interrupt()
 *
 * Reverses the effect of usb_hcd_lh7a404_probe(), first invoking
 * the HCD's stop() method.  It is always called from a thread
 * context, normally "rmmod", "apmd", or something similar.
 *
 */
void usb_hcd_lh7a404_remove (struct usb_hcd *hcd, struct platform_device *dev)
{
	usb_remove_hcd(hcd);
	lh7a404_stop_hc(dev);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
}

/*-------------------------------------------------------------------------*/

static int __devinit
ohci_lh7a404_start (struct usb_hcd *hcd)
{
	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);
	int		ret;

	ohci_dbg (ohci, "ohci_lh7a404_start, ohci:%p", ohci);
	if ((ret = ohci_init(ohci)) < 0)
		return ret;

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

/*-------------------------------------------------------------------------*/

static const struct hc_driver ohci_lh7a404_hc_driver = {
	.description =		hcd_name,
	.product_desc =		"LH7A404 OHCI",
	.hcd_priv_size =	sizeof(struct ohci_hcd),

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

	/*
	 * basic lifecycle operations
	 */
	.start =		ohci_lh7a404_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_lh7a404_drv_probe(struct platform_device *pdev)
{
	int ret;

	pr_debug ("In ohci_hcd_lh7a404_drv_probe");

	if (usb_disabled())
		return -ENODEV;

	ret = usb_hcd_lh7a404_probe(&ohci_lh7a404_hc_driver, pdev);
	return ret;
}

static int ohci_hcd_lh7a404_drv_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	usb_hcd_lh7a404_remove(hcd, pdev);
	return 0;
}
	/*TBD*/
/*static int ohci_hcd_lh7a404_drv_suspend(struct platform_device *dev)
{
	struct usb_hcd *hcd = platform_get_drvdata(dev);

	return 0;
}
static int ohci_hcd_lh7a404_drv_resume(struct platform_device *dev)
{
	struct usb_hcd *hcd = platform_get_drvdata(dev);


	return 0;
}
*/

static struct platform_driver ohci_hcd_lh7a404_driver = {
	.probe		= ohci_hcd_lh7a404_drv_probe,
	.remove		= ohci_hcd_lh7a404_drv_remove,
	.shutdown	= usb_hcd_platform_shutdown,
	/*.suspend	= ohci_hcd_lh7a404_drv_suspend, */
	/*.resume	= ohci_hcd_lh7a404_drv_resume, */
	.driver		= {
		.name	= "lh7a404-ohci",
		.owner	= THIS_MODULE,
	},
};

MODULE_ALIAS("platform:lh7a404-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 Sharp LH7A404
	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	*
	16	* This file is licenced under the GPL.
	17	*/
	18
d052d1be	19	#include <linux/platform_device.h>
de25968c	20	#include <linux/signal.h>
d052d1be	21
a09e64fb	22	#include <mach/hardware.h>
1da177e4 LT	23
	24
	25	extern int usb_disabled(void);
	26
	27	/-------------------------------------------------------------------------/
	28
	29	static void lh7a404_start_hc(struct platform_device *dev)
	30	{
f45ba776 JP	31	printk(KERN_DEBUG "%s: starting LH7A404 OHCI USB Controller\n",
f45ba776 JP	32	__FILE__);
1da177e4 LT	33
	34	/*
	35	* Now, carefully enable the USB clock, and take
	36	* the USB host controller out of reset.
	37	*/
	38	CSC_PWRCNT \|= CSC_PWRCNT_USBH_EN; /* Enable clock */
	39	udelay(1000);
	40	USBH_CMDSTATUS = OHCI_HCR;
dd9048af	41
f45ba776	42	printk(KERN_DEBUG "%s: Clock to USB host has been enabled \n", __FILE__);
1da177e4 LT	43	}
	44
	45	static void lh7a404_stop_hc(struct platform_device *dev)
	46	{
f45ba776 JP	47	printk(KERN_DEBUG "%s: stopping LH7A404 OHCI USB Controller\n",
f45ba776 JP	48	__FILE__);
1da177e4 LT	49
	50	CSC_PWRCNT &= ~CSC_PWRCNT_USBH_EN; /* Disable clock */
	51	}
	52
	53
	54	/-------------------------------------------------------------------------/
	55
	56	/* configure so an HC device and id are always provided */
	57	/* always called with process context; sleeping is OK */
	58
	59
	60	/**
	61	* usb_hcd_lh7a404_probe - initialize LH7A404-based HCDs
	62	* Context: !in_interrupt()
	63	*
	64	* Allocates basic resources for this USB host controller, and
	65	* then invokes the start() method for the HCD associated with it
	66	* through the hotplug entry's driver_data.
	67	*
	68	*/
	69	int usb_hcd_lh7a404_probe (const struct hc_driver *driver,
	70	struct platform_device *dev)
	71	{
	72	int retval;
	73	struct usb_hcd *hcd;
	74
	75	if (dev->resource[1].flags != IORESOURCE_IRQ) {
	76	pr_debug("resource[1] is not IORESOURCE_IRQ");
	77	return -ENOMEM;
	78	}
	79
	80	hcd = usb_create_hcd(driver, &dev->dev, "lh7a404");
	81	if (!hcd)
	82	return -ENOMEM;
	83	hcd->rsrc_start = dev->resource[0].start;
	84	hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
	85
	86	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
	87	pr_debug("request_mem_region failed");
	88	retval = -EBUSY;
	89	goto err1;
	90	}
dd9048af	91
1da177e4 LT	92	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	93	if (!hcd->regs) {
	94	pr_debug("ioremap failed");
	95	retval = -ENOMEM;
	96	goto err2;
	97	}
	98
	99	lh7a404_start_hc(dev);
	100	ohci_hcd_init(hcd_to_ohci(hcd));
	101
d54b5caa	102	retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED);
1da177e4 LT	103	if (retval == 0)
	104	return retval;
	105
	106	lh7a404_stop_hc(dev);
	107	iounmap(hcd->regs);
	108	err2:
	109	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	110	err1:
	111	usb_put_hcd(hcd);
	112	return retval;
	113	}
	114
	115
	116	/* may be called without controller electrically present */
	117	/* may be called with controller, bus, and devices active */
	118
	119	/**
	120	* usb_hcd_lh7a404_remove - shutdown processing for LH7A404-based HCDs
	121	* @dev: USB Host Controller being removed
	122	* Context: !in_interrupt()
	123	*
	124	* Reverses the effect of usb_hcd_lh7a404_probe(), first invoking
	125	* the HCD's stop() method. It is always called from a thread
	126	* context, normally "rmmod", "apmd", or something similar.
	127	*
	128	*/
	129	void usb_hcd_lh7a404_remove (struct usb_hcd hcd, struct platform_device dev)
	130	{
	131	usb_remove_hcd(hcd);
	132	lh7a404_stop_hc(dev);
	133	iounmap(hcd->regs);
	134	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	135	usb_put_hcd(hcd);
	136	}
	137
	138	/-------------------------------------------------------------------------/
	139
	140	static int __devinit
	141	ohci_lh7a404_start (struct usb_hcd *hcd)
	142	{
	143	struct ohci_hcd *ohci = hcd_to_ohci (hcd);
	144	int ret;
	145
	146	ohci_dbg (ohci, "ohci_lh7a404_start, ohci:%p", ohci);
	147	if ((ret = ohci_init(ohci)) < 0)
	148	return ret;
	149
	150	if ((ret = ohci_run (ohci)) < 0) {
	151	err ("can't start %s", hcd->self.bus_name);
	152	ohci_stop (hcd);
	153	return ret;
	154	}
	155	return 0;
	156	}
	157
	158	/-------------------------------------------------------------------------/
	159
	160	static const struct hc_driver ohci_lh7a404_hc_driver = {
	161	.description = hcd_name,
	162	.product_desc = "LH7A404 OHCI",
	163	.hcd_priv_size = sizeof(struct ohci_hcd),
	164
	165	/*
	166	* generic hardware linkage
167	*/
168	.irq = ohci_irq,
169	.flags = HCD_USB11 \| HCD_MEMORY,
170
171	/*
172	* basic lifecycle operations
173	*/
174	.start = ohci_lh7a404_start,
1da177e4	175	.stop = ohci_stop,
dd9048af	176	.shutdown = ohci_shutdown,
1da177e4 LT	177
	178	/*
	179	* managing i/o requests and associated device resources
	180	*/
	181	.urb_enqueue = ohci_urb_enqueue,
	182	.urb_dequeue = ohci_urb_dequeue,
	183	.endpoint_disable = ohci_endpoint_disable,
	184
	185	/*
	186	* scheduling support
	187	*/
	188	.get_frame_number = ohci_get_frame,
	189
	190	/*
	191	* root hub support
	192	*/
	193	.hub_status_data = ohci_hub_status_data,
	194	.hub_control = ohci_hub_control,
9293677a	195	#ifdef CONFIG_PM
0c0382e3 AS	196	.bus_suspend = ohci_bus_suspend,
0c0382e3 AS	197	.bus_resume = ohci_bus_resume,
9293677a DB	198	#endif
9293677a DB	199	.start_port_reset = ohci_start_port_reset,
1da177e4 LT	200	};
	201
	202	/-------------------------------------------------------------------------/
	203
3ae5eaec	204	static int ohci_hcd_lh7a404_drv_probe(struct platform_device *pdev)
1da177e4	205	{
1da177e4 LT	206	int ret;
	207
	208	pr_debug ("In ohci_hcd_lh7a404_drv_probe");
	209
	210	if (usb_disabled())
	211	return -ENODEV;
	212
	213	ret = usb_hcd_lh7a404_probe(&ohci_lh7a404_hc_driver, pdev);
	214	return ret;
	215	}
	216
3ae5eaec	217	static int ohci_hcd_lh7a404_drv_remove(struct platform_device *pdev)
1da177e4	218	{
87cf2039	219	struct usb_hcd *hcd = platform_get_drvdata(pdev);
1da177e4 LT	220
	221	usb_hcd_lh7a404_remove(hcd, pdev);
	222	return 0;
	223	}
	224	/TBD/
3ae5eaec	225	/static int ohci_hcd_lh7a404_drv_suspend(struct platform_device dev)
1da177e4	226	{
3ae5eaec	227	struct usb_hcd *hcd = platform_get_drvdata(dev);
1da177e4 LT	228
	229	return 0;
	230	}
3ae5eaec	231	static int ohci_hcd_lh7a404_drv_resume(struct platform_device *dev)
1da177e4	232	{
3ae5eaec	233	struct usb_hcd *hcd = platform_get_drvdata(dev);
1da177e4 LT	234
	235
	236	return 0;
	237	}
	238	*/
	239
3ae5eaec	240	static struct platform_driver ohci_hcd_lh7a404_driver = {
1da177e4 LT	241	.probe = ohci_hcd_lh7a404_drv_probe,
1da177e4 LT	242	.remove = ohci_hcd_lh7a404_drv_remove,
dd9048af	243	.shutdown = usb_hcd_platform_shutdown,
1da177e4 LT	244	/.suspend = ohci_hcd_lh7a404_drv_suspend, /
1da177e4 LT	245	/.resume = ohci_hcd_lh7a404_drv_resume, /
3ae5eaec RK	246	.driver = {
	247	.name = "lh7a404-ohci",
	248	.owner = THIS_MODULE,
	249	},
1da177e4 LT	250	};
1da177e4 LT	251
f4fce61d	252	MODULE_ALIAS("platform:lh7a404-ohci");