[mirror_ubuntu-artful-kernel.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 <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, SA_INTERRUPT);
	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,
#ifdef	CONFIG_PM
	/* suspend:		ohci_lh7a404_suspend,  -- tbd */
	/* resume:		ohci_lh7a404_resume,   -- tbd */
#endif /*CONFIG_PM*/
	.stop =			ohci_stop,

	/*
	 * 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 device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	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 device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct usb_hcd *hcd = dev_get_drvdata(dev);

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

	return 0;
}
static int ohci_hcd_lh7a404_drv_resume(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct usb_hcd *hcd = dev_get_drvdata(dev);


	return 0;
}
*/

static struct device_driver ohci_hcd_lh7a404_driver = {
	.name		= "lh7a404-ohci",
	.owner		= THIS_MODULE,
	.bus		= &platform_bus_type,
	.probe		= ohci_hcd_lh7a404_drv_probe,
	.remove		= ohci_hcd_lh7a404_drv_remove,
	/*.suspend	= ohci_hcd_lh7a404_drv_suspend, */
	/*.resume	= ohci_hcd_lh7a404_drv_resume, */
};

static int __init ohci_hcd_lh7a404_init (void)
{
	pr_debug (DRIVER_INFO " (LH7A404)");
	pr_debug ("block sizes: ed %d td %d\n",
		sizeof (struct ed), sizeof (struct td));

	return driver_register(&ohci_hcd_lh7a404_driver);
}

static void __exit ohci_hcd_lh7a404_cleanup (void)
{
	driver_unregister(&ohci_hcd_lh7a404_driver);
}

module_init (ohci_hcd_lh7a404_init);
module_exit (ohci_hcd_lh7a404_cleanup);
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
	19	#include <asm/hardware.h>
1da177e4 LT	20
	21
	22	extern int usb_disabled(void);
	23
	24	/-------------------------------------------------------------------------/
	25
	26	static void lh7a404_start_hc(struct platform_device *dev)
	27	{
	28	printk(KERN_DEBUG __FILE__
	29	": starting LH7A404 OHCI USB Controller\n");
	30
	31	/*
	32	* Now, carefully enable the USB clock, and take
	33	* the USB host controller out of reset.
	34	*/
	35	CSC_PWRCNT \|= CSC_PWRCNT_USBH_EN; /* Enable clock */
	36	udelay(1000);
	37	USBH_CMDSTATUS = OHCI_HCR;
	38
	39	printk(KERN_DEBUG __FILE__
	40	": Clock to USB host has been enabled \n");
	41	}
	42
	43	static void lh7a404_stop_hc(struct platform_device *dev)
	44	{
	45	printk(KERN_DEBUG __FILE__
	46	": stopping LH7A404 OHCI USB Controller\n");
	47
	48	CSC_PWRCNT &= ~CSC_PWRCNT_USBH_EN; /* Disable clock */
	49	}
	50
	51
	52	/-------------------------------------------------------------------------/
	53
	54	/* configure so an HC device and id are always provided */
	55	/* always called with process context; sleeping is OK */
	56
	57
	58	/**
	59	* usb_hcd_lh7a404_probe - initialize LH7A404-based HCDs
	60	* Context: !in_interrupt()
	61	*
	62	* Allocates basic resources for this USB host controller, and
	63	* then invokes the start() method for the HCD associated with it
	64	* through the hotplug entry's driver_data.
	65	*
	66	*/
	67	int usb_hcd_lh7a404_probe (const struct hc_driver *driver,
	68	struct platform_device *dev)
	69	{
	70	int retval;
	71	struct usb_hcd *hcd;
	72
	73	if (dev->resource[1].flags != IORESOURCE_IRQ) {
	74	pr_debug("resource[1] is not IORESOURCE_IRQ");
	75	return -ENOMEM;
	76	}
	77
	78	hcd = usb_create_hcd(driver, &dev->dev, "lh7a404");
	79	if (!hcd)
	80	return -ENOMEM;
	81	hcd->rsrc_start = dev->resource[0].start;
	82	hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
	83
84	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
85	pr_debug("request_mem_region failed");
86	retval = -EBUSY;
87	goto err1;
88	}
89
90	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
91	if (!hcd->regs) {
92	pr_debug("ioremap failed");
93	retval = -ENOMEM;
94	goto err2;
95	}
96
97	lh7a404_start_hc(dev);
98	ohci_hcd_init(hcd_to_ohci(hcd));
99
100	retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT);
101	if (retval == 0)
102	return retval;
103
104	lh7a404_stop_hc(dev);
105	iounmap(hcd->regs);
106	err2:
107	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
108	err1:
109	usb_put_hcd(hcd);
110	return retval;
111	}
112
113
114	/* may be called without controller electrically present */
115	/* may be called with controller, bus, and devices active */
116
117	/**
118	* usb_hcd_lh7a404_remove - shutdown processing for LH7A404-based HCDs
119	* @dev: USB Host Controller being removed
120	* Context: !in_interrupt()
121	*
122	* Reverses the effect of usb_hcd_lh7a404_probe(), first invoking
123	* the HCD's stop() method. It is always called from a thread
124	* context, normally "rmmod", "apmd", or something similar.
125	*
126	*/
127	void usb_hcd_lh7a404_remove (struct usb_hcd hcd, struct platform_device dev)
128	{
129	usb_remove_hcd(hcd);
130	lh7a404_stop_hc(dev);
131	iounmap(hcd->regs);
132	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
133	usb_put_hcd(hcd);
134	}
135
136	/-------------------------------------------------------------------------/
137
138	static int __devinit
139	ohci_lh7a404_start (struct usb_hcd *hcd)
140	{
141	struct ohci_hcd *ohci = hcd_to_ohci (hcd);
142	int ret;
143
144	ohci_dbg (ohci, "ohci_lh7a404_start, ohci:%p", ohci);
145	if ((ret = ohci_init(ohci)) < 0)
146	return ret;
147
148	if ((ret = ohci_run (ohci)) < 0) {
149	err ("can't start %s", hcd->self.bus_name);
150	ohci_stop (hcd);
151	return ret;
152	}
153	return 0;
154	}
155
156	/-------------------------------------------------------------------------/
157
158	static const struct hc_driver ohci_lh7a404_hc_driver = {
159	.description = hcd_name,
160	.product_desc = "LH7A404 OHCI",
161	.hcd_priv_size = sizeof(struct ohci_hcd),
162
163	/*
164	* generic hardware linkage
165	*/
166	.irq = ohci_irq,
167	.flags = HCD_USB11 \| HCD_MEMORY,
168
169	/*
170	* basic lifecycle operations
171	*/
172	.start = ohci_lh7a404_start,
173	#ifdef CONFIG_PM
174	/* suspend: ohci_lh7a404_suspend, -- tbd */
175	/* resume: ohci_lh7a404_resume, -- tbd */
176	#endif /CONFIG_PM/
177	.stop = ohci_stop,
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,
9293677a	196	#ifdef CONFIG_PM
0c0382e3 AS	197	.bus_suspend = ohci_bus_suspend,
0c0382e3 AS	198	.bus_resume = ohci_bus_resume,
9293677a DB	199	#endif
9293677a DB	200	.start_port_reset = ohci_start_port_reset,
1da177e4 LT	201	};
	202
	203	/-------------------------------------------------------------------------/
	204
	205	static int ohci_hcd_lh7a404_drv_probe(struct device *dev)
	206	{
	207	struct platform_device *pdev = to_platform_device(dev);
	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
	219	static int ohci_hcd_lh7a404_drv_remove(struct device *dev)
	220	{
	221	struct platform_device *pdev = to_platform_device(dev);
	222	struct usb_hcd *hcd = dev_get_drvdata(dev);
	223
	224	usb_hcd_lh7a404_remove(hcd, pdev);
	225	return 0;
	226	}
	227	/TBD/
	228	/static int ohci_hcd_lh7a404_drv_suspend(struct device dev)
	229	{
	230	struct platform_device *pdev = to_platform_device(dev);
	231	struct usb_hcd *hcd = dev_get_drvdata(dev);
	232
	233	return 0;
	234	}
	235	static int ohci_hcd_lh7a404_drv_resume(struct device *dev)
	236	{
	237	struct platform_device *pdev = to_platform_device(dev);
	238	struct usb_hcd *hcd = dev_get_drvdata(dev);
	239
	240
	241	return 0;
	242	}
	243	*/
	244
	245	static struct device_driver ohci_hcd_lh7a404_driver = {
	246	.name = "lh7a404-ohci",
efa400db	247	.owner = THIS_MODULE,
1da177e4 LT	248	.bus = &platform_bus_type,
	249	.probe = ohci_hcd_lh7a404_drv_probe,
	250	.remove = ohci_hcd_lh7a404_drv_remove,
	251	/.suspend = ohci_hcd_lh7a404_drv_suspend, /
	252	/.resume = ohci_hcd_lh7a404_drv_resume, /
	253	};
	254
	255	static int __init ohci_hcd_lh7a404_init (void)
	256	{
	257	pr_debug (DRIVER_INFO " (LH7A404)");
	258	pr_debug ("block sizes: ed %d td %d\n",
	259	sizeof (struct ed), sizeof (struct td));
	260
	261	return driver_register(&ohci_hcd_lh7a404_driver);
	262	}
	263
	264	static void __exit ohci_hcd_lh7a404_cleanup (void)
	265	{
	266	driver_unregister(&ohci_hcd_lh7a404_driver);
	267	}
	268
	269	module_init (ohci_hcd_lh7a404_init);
	270	module_exit (ohci_hcd_lh7a404_cleanup);