[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 Rusell 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 <asm/hardware.h>


extern int usb_disabled(void);

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

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

	/*
	 * 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 __FILE__
		   ": Clock to USB host has been enabled \n");
}

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

	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,
	.hub_irq_enable =	ohci_rhsc_enable,
#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>
	11	* Based on fragments of previous driver by Rusell King et al.
	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
1da177e4	22	#include <asm/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	{
	31	printk(KERN_DEBUG __FILE__
	32	": starting LH7A404 OHCI USB Controller\n");
	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
1da177e4 LT	42	printk(KERN_DEBUG __FILE__
	43	": Clock to USB host has been enabled \n");
	44	}
	45
	46	static void lh7a404_stop_hc(struct platform_device *dev)
	47	{
	48	printk(KERN_DEBUG __FILE__
	49	": stopping LH7A404 OHCI USB Controller\n");
	50
	51	CSC_PWRCNT &= ~CSC_PWRCNT_USBH_EN; /* Disable clock */
	52	}
	53
	54
	55	/-------------------------------------------------------------------------/
	56
	57	/* configure so an HC device and id are always provided */
	58	/* always called with process context; sleeping is OK */
	59
	60
	61	/**
	62	* usb_hcd_lh7a404_probe - initialize LH7A404-based HCDs
	63	* Context: !in_interrupt()
	64	*
	65	* Allocates basic resources for this USB host controller, and
	66	* then invokes the start() method for the HCD associated with it
	67	* through the hotplug entry's driver_data.
	68	*
	69	*/
	70	int usb_hcd_lh7a404_probe (const struct hc_driver *driver,
	71	struct platform_device *dev)
	72	{
	73	int retval;
	74	struct usb_hcd *hcd;
	75
	76	if (dev->resource[1].flags != IORESOURCE_IRQ) {
	77	pr_debug("resource[1] is not IORESOURCE_IRQ");
	78	return -ENOMEM;
	79	}
	80
	81	hcd = usb_create_hcd(driver, &dev->dev, "lh7a404");
	82	if (!hcd)
	83	return -ENOMEM;
	84	hcd->rsrc_start = dev->resource[0].start;
	85	hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
	86
	87	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
	88	pr_debug("request_mem_region failed");
	89	retval = -EBUSY;
	90	goto err1;
	91	}
dd9048af	92
1da177e4 LT	93	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	94	if (!hcd->regs) {
	95	pr_debug("ioremap failed");
	96	retval = -ENOMEM;
	97	goto err2;
	98	}
	99
	100	lh7a404_start_hc(dev);
	101	ohci_hcd_init(hcd_to_ohci(hcd));
	102
d54b5caa	103	retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED);
1da177e4 LT	104	if (retval == 0)
	105	return retval;
	106
	107	lh7a404_stop_hc(dev);
	108	iounmap(hcd->regs);
	109	err2:
	110	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	111	err1:
	112	usb_put_hcd(hcd);
	113	return retval;
	114	}
	115
	116
	117	/* may be called without controller electrically present */
	118	/* may be called with controller, bus, and devices active */
	119
	120	/**
	121	* usb_hcd_lh7a404_remove - shutdown processing for LH7A404-based HCDs
	122	* @dev: USB Host Controller being removed
	123	* Context: !in_interrupt()
	124	*
	125	* Reverses the effect of usb_hcd_lh7a404_probe(), first invoking
	126	* the HCD's stop() method. It is always called from a thread
	127	* context, normally "rmmod", "apmd", or something similar.
	128	*
	129	*/
	130	void usb_hcd_lh7a404_remove (struct usb_hcd hcd, struct platform_device dev)
	131	{
	132	usb_remove_hcd(hcd);
	133	lh7a404_stop_hc(dev);
	134	iounmap(hcd->regs);
	135	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	136	usb_put_hcd(hcd);
	137	}
	138
	139	/-------------------------------------------------------------------------/
	140
	141	static int __devinit
	142	ohci_lh7a404_start (struct usb_hcd *hcd)
	143	{
	144	struct ohci_hcd *ohci = hcd_to_ohci (hcd);
	145	int ret;
	146
	147	ohci_dbg (ohci, "ohci_lh7a404_start, ohci:%p", ohci);
	148	if ((ret = ohci_init(ohci)) < 0)
	149	return ret;
	150
	151	if ((ret = ohci_run (ohci)) < 0) {
	152	err ("can't start %s", hcd->self.bus_name);
	153	ohci_stop (hcd);
	154	return ret;
	155	}
	156	return 0;
	157	}
	158
	159	/-------------------------------------------------------------------------/
	160
	161	static const struct hc_driver ohci_lh7a404_hc_driver = {
	162	.description = hcd_name,
	163	.product_desc = "LH7A404 OHCI",
	164	.hcd_priv_size = sizeof(struct ohci_hcd),
	165
	166	/*
	167	* generic hardware linkage
168	*/
169	.irq = ohci_irq,
170	.flags = HCD_USB11 \| HCD_MEMORY,
171
172	/*
173	* basic lifecycle operations
174	*/
175	.start = ohci_lh7a404_start,
1da177e4	176	.stop = ohci_stop,
dd9048af	177	.shutdown = ohci_shutdown,
1da177e4 LT	178
	179	/*
	180	* managing i/o requests and associated device resources
	181	*/
	182	.urb_enqueue = ohci_urb_enqueue,
	183	.urb_dequeue = ohci_urb_dequeue,
	184	.endpoint_disable = ohci_endpoint_disable,
	185
	186	/*
	187	* scheduling support
	188	*/
	189	.get_frame_number = ohci_get_frame,
	190
	191	/*
	192	* root hub support
	193	*/
	194	.hub_status_data = ohci_hub_status_data,
	195	.hub_control = ohci_hub_control,
09ca8adb	196	.hub_irq_enable = ohci_rhsc_enable,
9293677a	197	#ifdef CONFIG_PM
0c0382e3 AS	198	.bus_suspend = ohci_bus_suspend,
0c0382e3 AS	199	.bus_resume = ohci_bus_resume,
9293677a DB	200	#endif
9293677a DB	201	.start_port_reset = ohci_start_port_reset,
1da177e4 LT	202	};
	203
	204	/-------------------------------------------------------------------------/
	205
3ae5eaec	206	static int ohci_hcd_lh7a404_drv_probe(struct platform_device *pdev)
1da177e4	207	{
1da177e4 LT	208	int ret;
	209
	210	pr_debug ("In ohci_hcd_lh7a404_drv_probe");
	211
	212	if (usb_disabled())
	213	return -ENODEV;
	214
	215	ret = usb_hcd_lh7a404_probe(&ohci_lh7a404_hc_driver, pdev);
	216	return ret;
	217	}
	218
3ae5eaec	219	static int ohci_hcd_lh7a404_drv_remove(struct platform_device *pdev)
1da177e4	220	{
87cf2039	221	struct usb_hcd *hcd = platform_get_drvdata(pdev);
1da177e4 LT	222
	223	usb_hcd_lh7a404_remove(hcd, pdev);
	224	return 0;
	225	}
	226	/TBD/
3ae5eaec	227	/static int ohci_hcd_lh7a404_drv_suspend(struct platform_device dev)
1da177e4	228	{
3ae5eaec	229	struct usb_hcd *hcd = platform_get_drvdata(dev);
1da177e4 LT	230
	231	return 0;
	232	}
3ae5eaec	233	static int ohci_hcd_lh7a404_drv_resume(struct platform_device *dev)
1da177e4	234	{
3ae5eaec	235	struct usb_hcd *hcd = platform_get_drvdata(dev);
1da177e4 LT	236
	237
	238	return 0;
	239	}
	240	*/
	241
3ae5eaec	242	static struct platform_driver ohci_hcd_lh7a404_driver = {
1da177e4 LT	243	.probe = ohci_hcd_lh7a404_drv_probe,
1da177e4 LT	244	.remove = ohci_hcd_lh7a404_drv_remove,
dd9048af	245	.shutdown = usb_hcd_platform_shutdown,
1da177e4 LT	246	/.suspend = ohci_hcd_lh7a404_drv_suspend, /
1da177e4 LT	247	/.resume = ohci_hcd_lh7a404_drv_resume, /
3ae5eaec RK	248	.driver = {
	249	.name = "lh7a404-ohci",
	250	.owner = THIS_MODULE,
	251	},
1da177e4 LT	252	};
1da177e4 LT	253
f4fce61d	254	MODULE_ALIAS("platform:lh7a404-ohci");