[mirror_ubuntu-eoan-kernel.git] / drivers / usb / host / ohci-at91.c

/*
 * OHCI HCD (Host Controller Driver) for USB.
 *
 *  Copyright (C) 2004 SAN People (Pty) Ltd.
 *  Copyright (C) 2005 Thibaut VARENE <varenet@parisc-linux.org>
 *
 * AT91 Bus Glue
 *
 * Based on fragments of 2.4 driver by Rick Bronson.
 * Based on ohci-omap.c
 *
 * This file is licenced under the GPL.
 */

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

#include <mach/hardware.h>
#include <asm/gpio.h>

#include <mach/board.h>
#include <mach/cpu.h>

#ifndef CONFIG_ARCH_AT91
#error "CONFIG_ARCH_AT91 must be defined."
#endif

/* interface and function clocks; sometimes also an AHB clock */
static struct clk *iclk, *fclk, *hclk;
static int clocked;

extern int usb_disabled(void);

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

static void at91_start_clock(void)
{
	clk_enable(hclk);
	clk_enable(iclk);
	clk_enable(fclk);
	clocked = 1;
}

static void at91_stop_clock(void)
{
	clk_disable(fclk);
	clk_disable(iclk);
	clk_disable(hclk);
	clocked = 0;
}

static void at91_start_hc(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	struct ohci_regs __iomem *regs = hcd->regs;

	dev_dbg(&pdev->dev, "start\n");

	/*
	 * Start the USB clocks.
	 */
	at91_start_clock();

	/*
	 * The USB host controller must remain in reset.
	 */
	writel(0, &regs->control);
}

static void at91_stop_hc(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	struct ohci_regs __iomem *regs = hcd->regs;

	dev_dbg(&pdev->dev, "stop\n");

	/*
	 * Put the USB host controller into reset.
	 */
	writel(0, &regs->control);

	/*
	 * Stop the USB clocks.
	 */
	at91_stop_clock();
}


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

static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *);

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


/**
 * usb_hcd_at91_probe - initialize AT91-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.
 */
static int usb_hcd_at91_probe(const struct hc_driver *driver,
			struct platform_device *pdev)
{
	int retval;
	struct usb_hcd *hcd = NULL;

	if (pdev->num_resources != 2) {
		pr_debug("hcd probe: invalid num_resources");
		return -ENODEV;
	}

	if ((pdev->resource[0].flags != IORESOURCE_MEM)
			|| (pdev->resource[1].flags != IORESOURCE_IRQ)) {
		pr_debug("hcd probe: invalid resource type\n");
		return -ENODEV;
	}

	hcd = usb_create_hcd(driver, &pdev->dev, "at91");
	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");
		retval = -EBUSY;
		goto err1;
	}

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

	iclk = clk_get(&pdev->dev, "ohci_clk");
	fclk = clk_get(&pdev->dev, "uhpck");
	hclk = clk_get(&pdev->dev, "hclk");

	at91_start_hc(pdev);
	ohci_hcd_init(hcd_to_ohci(hcd));

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

	/* Error handling */
	at91_stop_hc(pdev);

	clk_put(hclk);
	clk_put(fclk);
	clk_put(iclk);

	iounmap(hcd->regs);

 err2:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);

 err1:
	usb_put_hcd(hcd);
	return retval;
}


/* may be called with controller, bus, and devices active */

/**
 * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs
 * @dev: USB Host Controller being removed
 * Context: !in_interrupt()
 *
 * Reverses the effect of usb_hcd_at91_probe(), first invoking
 * the HCD's stop() method.  It is always called from a thread
 * context, "rmmod" or something similar.
 *
 */
static void usb_hcd_at91_remove(struct usb_hcd *hcd,
				struct platform_device *pdev)
{
	usb_remove_hcd(hcd);
	at91_stop_hc(pdev);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);

	clk_put(hclk);
	clk_put(fclk);
	clk_put(iclk);
	fclk = iclk = hclk = NULL;

	dev_set_drvdata(&pdev->dev, NULL);
}

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

static int __devinit
ohci_at91_start (struct usb_hcd *hcd)
{
	struct at91_usbh_data	*board = hcd->self.controller->platform_data;
	struct ohci_hcd		*ohci = hcd_to_ohci (hcd);
	int			ret;

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

	ohci->num_ports = board->ports;

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

static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable)
{
	if (port < 0 || port >= 2)
		return;

	if (!gpio_is_valid(pdata->vbus_pin[port]))
		return;

	gpio_set_value(pdata->vbus_pin[port], !pdata->vbus_pin_inverted ^ enable);
}

static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port)
{
	if (port < 0 || port >= 2)
		return -EINVAL;

	if (!gpio_is_valid(pdata->vbus_pin[port]))
		return -EINVAL;

	return gpio_get_value(pdata->vbus_pin[port]) ^ !pdata->vbus_pin_inverted;
}

/*
 * Update the status data from the hub with the over-current indicator change.
 */
static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf)
{
	struct at91_usbh_data *pdata = hcd->self.controller->platform_data;
	int length = ohci_hub_status_data(hcd, buf);
	int port;

	for (port = 0; port < ARRAY_SIZE(pdata->overcurrent_pin); port++) {
		if (pdata->overcurrent_changed[port]) {
			if (! length)
				length = 1;
			buf[0] |= 1 << (port + 1);
		}
	}

	return length;
}

/*
 * Look at the control requests to the root hub and see if we need to override.
 */
static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
				 u16 wIndex, char *buf, u16 wLength)
{
	struct at91_usbh_data *pdata = hcd->self.controller->platform_data;
	struct usb_hub_descriptor *desc;
	int ret = -EINVAL;
	u32 *data = (u32 *)buf;

	dev_dbg(hcd->self.controller,
		"ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n",
		hcd, typeReq, wValue, wIndex, buf, wLength);

	switch (typeReq) {
	case SetPortFeature:
		if (wValue == USB_PORT_FEAT_POWER) {
			dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n");
			ohci_at91_usb_set_power(pdata, wIndex - 1, 1);
			goto out;
		}
		break;

	case ClearPortFeature:
		switch (wValue) {
		case USB_PORT_FEAT_C_OVER_CURRENT:
			dev_dbg(hcd->self.controller,
				"ClearPortFeature: C_OVER_CURRENT\n");

			if (wIndex == 1 || wIndex == 2) {
				pdata->overcurrent_changed[wIndex-1] = 0;
				pdata->overcurrent_status[wIndex-1] = 0;
			}

			goto out;

		case USB_PORT_FEAT_OVER_CURRENT:
			dev_dbg(hcd->self.controller,
				"ClearPortFeature: OVER_CURRENT\n");

			if (wIndex == 1 || wIndex == 2) {
				pdata->overcurrent_status[wIndex-1] = 0;
			}

			goto out;

		case USB_PORT_FEAT_POWER:
			dev_dbg(hcd->self.controller,
				"ClearPortFeature: POWER\n");

			if (wIndex == 1 || wIndex == 2) {
				ohci_at91_usb_set_power(pdata, wIndex - 1, 0);
				return 0;
			}
		}
		break;
	}

	ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
	if (ret)
		goto out;

	switch (typeReq) {
	case GetHubDescriptor:

		/* update the hub's descriptor */

		desc = (struct usb_hub_descriptor *)buf;

		dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n",
			desc->wHubCharacteristics);

		/* remove the old configurations for power-switching, and
		 * over-current protection, and insert our new configuration
		 */

		desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM);
		desc->wHubCharacteristics |= cpu_to_le16(0x0001);

		if (pdata->overcurrent_supported) {
			desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM);
			desc->wHubCharacteristics |=  cpu_to_le16(0x0008|0x0001);
		}

		dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n",
			desc->wHubCharacteristics);

		return ret;

	case GetPortStatus:
		/* check port status */

		dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex);

		if (wIndex == 1 || wIndex == 2) {
			if (! ohci_at91_usb_get_power(pdata, wIndex-1)) {
				*data &= ~cpu_to_le32(RH_PS_PPS);
			}

			if (pdata->overcurrent_changed[wIndex-1]) {
				*data |= cpu_to_le32(RH_PS_OCIC);
			}

			if (pdata->overcurrent_status[wIndex-1]) {
				*data |= cpu_to_le32(RH_PS_POCI);
			}
		}
	}

 out:
	return ret;
}

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

static const struct hc_driver ohci_at91_hc_driver = {
	.description =		hcd_name,
	.product_desc =		"AT91 OHCI",
	.hcd_priv_size =	sizeof(struct ohci_hcd),

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

	/*
	 * basic lifecycle operations
	 */
	.start =		ohci_at91_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_at91_hub_status_data,
	.hub_control =		ohci_at91_hub_control,
#ifdef CONFIG_PM
	.bus_suspend =		ohci_bus_suspend,
	.bus_resume =		ohci_bus_resume,
#endif
	.start_port_reset =	ohci_start_port_reset,
};

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

static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data)
{
	struct platform_device *pdev = data;
	struct at91_usbh_data *pdata = pdev->dev.platform_data;
	int val, gpio, port;

	/* From the GPIO notifying the over-current situation, find
	 * out the corresponding port */
	gpio = irq_to_gpio(irq);
	for (port = 0; port < ARRAY_SIZE(pdata->overcurrent_pin); port++) {
		if (pdata->overcurrent_pin[port] == gpio)
			break;
	}

	if (port == ARRAY_SIZE(pdata->overcurrent_pin)) {
		dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n");
		return IRQ_HANDLED;
	}

	val = gpio_get_value(gpio);

	/* When notified of an over-current situation, disable power
	   on the corresponding port, and mark this port in
	   over-current. */
	if (! val) {
		ohci_at91_usb_set_power(pdata, port, 0);
		pdata->overcurrent_status[port]  = 1;
		pdata->overcurrent_changed[port] = 1;
	}

	dev_dbg(& pdev->dev, "overcurrent situation %s\n",
		val ? "exited" : "notified");

	return IRQ_HANDLED;
}

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

static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)
{
	struct at91_usbh_data	*pdata = pdev->dev.platform_data;
	int			i;

	if (pdata) {
		for (i = 0; i < ARRAY_SIZE(pdata->vbus_pin); i++) {
			if (!gpio_is_valid(pdata->vbus_pin[i]))
				continue;
			gpio_request(pdata->vbus_pin[i], "ohci_vbus");
			ohci_at91_usb_set_power(pdata, i, 1);
		}

		for (i = 0; i < ARRAY_SIZE(pdata->overcurrent_pin); i++) {
			int ret;

			if (!gpio_is_valid(pdata->overcurrent_pin[i]))
				continue;
			gpio_request(pdata->overcurrent_pin[i], "ohci_overcurrent");

			ret = request_irq(gpio_to_irq(pdata->overcurrent_pin[i]),
					  ohci_hcd_at91_overcurrent_irq,
					  IRQF_SHARED, "ohci_overcurrent", pdev);
			if (ret) {
				gpio_free(pdata->overcurrent_pin[i]);
				dev_warn(& pdev->dev, "cannot get GPIO IRQ for overcurrent\n");
			}
		}
	}

	device_init_wakeup(&pdev->dev, 1);
	return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev);
}

static int ohci_hcd_at91_drv_remove(struct platform_device *pdev)
{
	struct at91_usbh_data	*pdata = pdev->dev.platform_data;
	int			i;

	if (pdata) {
		for (i = 0; i < ARRAY_SIZE(pdata->vbus_pin); i++) {
			if (!gpio_is_valid(pdata->vbus_pin[i]))
				continue;
			ohci_at91_usb_set_power(pdata, i, 0);
			gpio_free(pdata->vbus_pin[i]);
		}

		for (i = 0; i < ARRAY_SIZE(pdata->overcurrent_pin); i++) {
			if (!gpio_is_valid(pdata->overcurrent_pin[i]))
				continue;
			free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev);
			gpio_free(pdata->overcurrent_pin[i]);
		}
	}

	device_init_wakeup(&pdev->dev, 0);
	usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev);
	return 0;
}

#ifdef CONFIG_PM

static int
ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg)
{
	struct usb_hcd	*hcd = platform_get_drvdata(pdev);
	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);

	if (device_may_wakeup(&pdev->dev))
		enable_irq_wake(hcd->irq);

	/*
	 * The integrated transceivers seem unable to notice disconnect,
	 * reconnect, or wakeup without the 48 MHz clock active.  so for
	 * correctness, always discard connection state (using reset).
	 *
	 * REVISIT: some boards will be able to turn VBUS off...
	 */
	if (at91_suspend_entering_slow_clock()) {
		ohci_usb_reset (ohci);
		/* flush the writes */
		(void) ohci_readl (ohci, &ohci->regs->control);
		at91_stop_clock();
	}

	return 0;
}

static int ohci_hcd_at91_drv_resume(struct platform_device *pdev)
{
	struct usb_hcd	*hcd = platform_get_drvdata(pdev);

	if (device_may_wakeup(&pdev->dev))
		disable_irq_wake(hcd->irq);

	if (!clocked)
		at91_start_clock();

	ohci_finish_controller_resume(hcd);
	return 0;
}
#else
#define ohci_hcd_at91_drv_suspend NULL
#define ohci_hcd_at91_drv_resume  NULL
#endif

MODULE_ALIAS("platform:at91_ohci");

static struct platform_driver ohci_hcd_at91_driver = {
	.probe		= ohci_hcd_at91_drv_probe,
	.remove		= ohci_hcd_at91_drv_remove,
	.shutdown	= usb_hcd_platform_shutdown,
	.suspend	= ohci_hcd_at91_drv_suspend,
	.resume		= ohci_hcd_at91_drv_resume,
	.driver		= {
		.name	= "at91_ohci",
		.owner	= THIS_MODULE,
	},
};
Commit	Line	Data
39a269c0 AV	1	/*
	2	* OHCI HCD (Host Controller Driver) for USB.
	3	*
	4	* Copyright (C) 2004 SAN People (Pty) Ltd.
	5	* Copyright (C) 2005 Thibaut VARENE <varenet@parisc-linux.org>
	6	*
0365ee0a	7	* AT91 Bus Glue
39a269c0 AV	8	*
	9	* Based on fragments of 2.4 driver by Rick Bronson.
	10	* Based on ohci-omap.c
	11	*
	12	* This file is licenced under the GPL.
	13	*/
	14
	15	#include <linux/clk.h>
	16	#include <linux/platform_device.h>
	17
a09e64fb	18	#include <mach/hardware.h>
4bde4a4c DB	19	#include <asm/gpio.h>
4bde4a4c DB	20
a09e64fb RK	21	#include <mach/board.h>
a09e64fb RK	22	#include <mach/cpu.h>
39a269c0	23
0365ee0a DB	24	#ifndef CONFIG_ARCH_AT91
0365ee0a DB	25	#error "CONFIG_ARCH_AT91 must be defined."
39a269c0 AV	26	#endif
39a269c0 AV	27
ed077bb7 AV	28	/* interface and function clocks; sometimes also an AHB clock */
ed077bb7 AV	29	static struct clk iclk, fclk, *hclk;
0365ee0a	30	static int clocked;
39a269c0 AV	31
	32	extern int usb_disabled(void);
	33
	34	/-------------------------------------------------------------------------/
	35
ed077bb7 AV	36	static void at91_start_clock(void)
ed077bb7 AV	37	{
0af4316b	38	clk_enable(hclk);
ed077bb7 AV	39	clk_enable(iclk);
	40	clk_enable(fclk);
	41	clocked = 1;
	42	}
	43
	44	static void at91_stop_clock(void)
	45	{
	46	clk_disable(fclk);
	47	clk_disable(iclk);
0af4316b	48	clk_disable(hclk);
ed077bb7 AV	49	clocked = 0;
	50	}
	51
39a269c0 AV	52	static void at91_start_hc(struct platform_device *pdev)
	53	{
	54	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	55	struct ohci_regs __iomem *regs = hcd->regs;
	56
0365ee0a	57	dev_dbg(&pdev->dev, "start\n");
39a269c0 AV	58
	59	/*
	60	* Start the USB clocks.
	61	*/
ed077bb7	62	at91_start_clock();
39a269c0 AV	63
	64	/*
	65	* The USB host controller must remain in reset.
	66	*/
	67	writel(0, &regs->control);
	68	}
	69
	70	static void at91_stop_hc(struct platform_device *pdev)
	71	{
	72	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	73	struct ohci_regs __iomem *regs = hcd->regs;
	74
0365ee0a	75	dev_dbg(&pdev->dev, "stop\n");
39a269c0 AV	76
	77	/*
	78	* Put the USB host controller into reset.
	79	*/
	80	writel(0, &regs->control);
	81
	82	/*
	83	* Stop the USB clocks.
	84	*/
ed077bb7	85	at91_stop_clock();
39a269c0 AV	86	}
	87
	88
	89	/-------------------------------------------------------------------------/
	90
421b4bf5	91	static void usb_hcd_at91_remove (struct usb_hcd , struct platform_device );
39a269c0 AV	92
	93	/* configure so an HC device and id are always provided */
	94	/* always called with process context; sleeping is OK */
	95
	96
	97	/**
0365ee0a	98	* usb_hcd_at91_probe - initialize AT91-based HCDs
39a269c0 AV	99	* Context: !in_interrupt()
	100	*
	101	* Allocates basic resources for this USB host controller, and
	102	* then invokes the start() method for the HCD associated with it
	103	* through the hotplug entry's driver_data.
39a269c0	104	*/
0365ee0a DB	105	static int usb_hcd_at91_probe(const struct hc_driver *driver,
0365ee0a DB	106	struct platform_device *pdev)
39a269c0 AV	107	{
	108	int retval;
	109	struct usb_hcd *hcd = NULL;
	110
	111	if (pdev->num_resources != 2) {
	112	pr_debug("hcd probe: invalid num_resources");
	113	return -ENODEV;
	114	}
	115
0365ee0a DB	116	if ((pdev->resource[0].flags != IORESOURCE_MEM)
0365ee0a DB	117	\|\| (pdev->resource[1].flags != IORESOURCE_IRQ)) {
39a269c0 AV	118	pr_debug("hcd probe: invalid resource type\n");
	119	return -ENODEV;
	120	}
	121
0365ee0a	122	hcd = usb_create_hcd(driver, &pdev->dev, "at91");
39a269c0 AV	123	if (!hcd)
	124	return -ENOMEM;
	125	hcd->rsrc_start = pdev->resource[0].start;
	126	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
	127
	128	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
	129	pr_debug("request_mem_region failed\n");
	130	retval = -EBUSY;
	131	goto err1;
	132	}
	133
	134	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	135	if (!hcd->regs) {
	136	pr_debug("ioremap failed\n");
	137	retval = -EIO;
	138	goto err2;
	139	}
	140
	141	iclk = clk_get(&pdev->dev, "ohci_clk");
	142	fclk = clk_get(&pdev->dev, "uhpck");
0af4316b	143	hclk = clk_get(&pdev->dev, "hclk");
39a269c0 AV	144
	145	at91_start_hc(pdev);
	146	ohci_hcd_init(hcd_to_ohci(hcd));
	147
2f2cac3c	148	retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED);
39a269c0 AV	149	if (retval == 0)
	150	return retval;
	151
	152	/* Error handling */
	153	at91_stop_hc(pdev);
	154
0af4316b	155	clk_put(hclk);
39a269c0 AV	156	clk_put(fclk);
	157	clk_put(iclk);
	158
	159	iounmap(hcd->regs);
	160
	161	err2:
	162	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	163
	164	err1:
	165	usb_put_hcd(hcd);
	166	return retval;
	167	}
	168
	169
39a269c0 AV	170	/* may be called with controller, bus, and devices active */
	171
	172	/**
0365ee0a	173	* usb_hcd_at91_remove - shutdown processing for AT91-based HCDs
39a269c0 AV	174	* @dev: USB Host Controller being removed
	175	* Context: !in_interrupt()
	176	*
	177	* Reverses the effect of usb_hcd_at91_probe(), first invoking
	178	* the HCD's stop() method. It is always called from a thread
0365ee0a	179	* context, "rmmod" or something similar.
39a269c0 AV	180	*
39a269c0 AV	181	*/
421b4bf5	182	static void usb_hcd_at91_remove(struct usb_hcd *hcd,
0365ee0a	183	struct platform_device *pdev)
39a269c0 AV	184	{
	185	usb_remove_hcd(hcd);
	186	at91_stop_hc(pdev);
	187	iounmap(hcd->regs);
68ba61b8	188	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
421b4bf5	189	usb_put_hcd(hcd);
39a269c0	190
0af4316b	191	clk_put(hclk);
68ba61b8 DB	192	clk_put(fclk);
68ba61b8 DB	193	clk_put(iclk);
ed077bb7	194	fclk = iclk = hclk = NULL;
39a269c0 AV	195
39a269c0 AV	196	dev_set_drvdata(&pdev->dev, NULL);
39a269c0 AV	197	}
	198
	199	/-------------------------------------------------------------------------/
	200
	201	static int __devinit
	202	ohci_at91_start (struct usb_hcd *hcd)
	203	{
0365ee0a	204	struct at91_usbh_data *board = hcd->self.controller->platform_data;
39a269c0 AV	205	struct ohci_hcd *ohci = hcd_to_ohci (hcd);
	206	int ret;
	207
	208	if ((ret = ohci_init(ohci)) < 0)
	209	return ret;
	210
cd22afda	211	ohci->num_ports = board->ports;
0365ee0a	212
39a269c0 AV	213	if ((ret = ohci_run(ohci)) < 0) {
	214	err("can't start %s", hcd->self.bus_name);
	215	ohci_stop(hcd);
	216	return ret;
	217	}
39a269c0 AV	218	return 0;
	219	}
	220
aa6e52a3 TP	221	static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable)
	222	{
	223	if (port < 0 \|\| port >= 2)
	224	return;
	225
8a7a49d1	226	if (!gpio_is_valid(pdata->vbus_pin[port]))
770f0baa JCPV	227	return;
770f0baa JCPV	228
aa6e52a3 TP	229	gpio_set_value(pdata->vbus_pin[port], !pdata->vbus_pin_inverted ^ enable);
	230	}
	231
	232	static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port)
	233	{
	234	if (port < 0 \|\| port >= 2)
	235	return -EINVAL;
	236
8a7a49d1	237	if (!gpio_is_valid(pdata->vbus_pin[port]))
770f0baa JCPV	238	return -EINVAL;
770f0baa JCPV	239
aa6e52a3 TP	240	return gpio_get_value(pdata->vbus_pin[port]) ^ !pdata->vbus_pin_inverted;
	241	}
	242
	243	/*
	244	* Update the status data from the hub with the over-current indicator change.
	245	*/
	246	static int ohci_at91_hub_status_data(struct usb_hcd hcd, char buf)
	247	{
	248	struct at91_usbh_data *pdata = hcd->self.controller->platform_data;
	249	int length = ohci_hub_status_data(hcd, buf);
	250	int port;
	251
	252	for (port = 0; port < ARRAY_SIZE(pdata->overcurrent_pin); port++) {
	253	if (pdata->overcurrent_changed[port]) {
	254	if (! length)
	255	length = 1;
	256	buf[0] \|= 1 << (port + 1);
	257	}
	258	}
	259
	260	return length;
	261	}
	262
	263	/*
	264	* Look at the control requests to the root hub and see if we need to override.
	265	*/
	266	static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
	267	u16 wIndex, char *buf, u16 wLength)
	268	{
	269	struct at91_usbh_data *pdata = hcd->self.controller->platform_data;
	270	struct usb_hub_descriptor *desc;
	271	int ret = -EINVAL;
	272	u32 data = (u32 )buf;
	273
	274	dev_dbg(hcd->self.controller,
	275	"ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n",
	276	hcd, typeReq, wValue, wIndex, buf, wLength);
	277
	278	switch (typeReq) {
	279	case SetPortFeature:
	280	if (wValue == USB_PORT_FEAT_POWER) {
	281	dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n");
	282	ohci_at91_usb_set_power(pdata, wIndex - 1, 1);
	283	goto out;
	284	}
	285	break;
	286
	287	case ClearPortFeature:
	288	switch (wValue) {
	289	case USB_PORT_FEAT_C_OVER_CURRENT:
	290	dev_dbg(hcd->self.controller,
	291	"ClearPortFeature: C_OVER_CURRENT\n");
	292
	293	if (wIndex == 1 \|\| wIndex == 2) {
	294	pdata->overcurrent_changed[wIndex-1] = 0;
	295	pdata->overcurrent_status[wIndex-1] = 0;
	296	}
	297
	298	goto out;
	299
	300	case USB_PORT_FEAT_OVER_CURRENT:
	301	dev_dbg(hcd->self.controller,
	302	"ClearPortFeature: OVER_CURRENT\n");
	303
304	if (wIndex == 1 \|\| wIndex == 2) {
305	pdata->overcurrent_status[wIndex-1] = 0;
306	}
307
308	goto out;
309
310	case USB_PORT_FEAT_POWER:
311	dev_dbg(hcd->self.controller,
312	"ClearPortFeature: POWER\n");
313
314	if (wIndex == 1 \|\| wIndex == 2) {
315	ohci_at91_usb_set_power(pdata, wIndex - 1, 0);
316	return 0;
317	}
318	}
319	break;
320	}
321
322	ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
323	if (ret)
324	goto out;
325
326	switch (typeReq) {
327	case GetHubDescriptor:
328
329	/* update the hub's descriptor */
330
331	desc = (struct usb_hub_descriptor *)buf;
332
333	dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n",
334	desc->wHubCharacteristics);
335
336	/* remove the old configurations for power-switching, and
337	* over-current protection, and insert our new configuration
338	*/
339
340	desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM);
341	desc->wHubCharacteristics \|= cpu_to_le16(0x0001);
342
343	if (pdata->overcurrent_supported) {
344	desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM);
345	desc->wHubCharacteristics \|= cpu_to_le16(0x0008\|0x0001);
346	}
347
348	dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n",
349	desc->wHubCharacteristics);
350
351	return ret;
352
353	case GetPortStatus:
354	/* check port status */
355
356	dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex);
357
358	if (wIndex == 1 \|\| wIndex == 2) {
359	if (! ohci_at91_usb_get_power(pdata, wIndex-1)) {
360	*data &= ~cpu_to_le32(RH_PS_PPS);
361	}
362
363	if (pdata->overcurrent_changed[wIndex-1]) {
364	*data \|= cpu_to_le32(RH_PS_OCIC);
365	}
366
367	if (pdata->overcurrent_status[wIndex-1]) {
368	*data \|= cpu_to_le32(RH_PS_POCI);
369	}
370	}
371	}
372
373	out:
374	return ret;
375	}
376
39a269c0 AV	377	/-------------------------------------------------------------------------/
	378
	379	static const struct hc_driver ohci_at91_hc_driver = {
	380	.description = hcd_name,
0365ee0a	381	.product_desc = "AT91 OHCI",
39a269c0 AV	382	.hcd_priv_size = sizeof(struct ohci_hcd),
	383
	384	/*
	385	* generic hardware linkage
	386	*/
	387	.irq = ohci_irq,
	388	.flags = HCD_USB11 \| HCD_MEMORY,
	389
	390	/*
	391	* basic lifecycle operations
	392	*/
	393	.start = ohci_at91_start,
	394	.stop = ohci_stop,
dd9048af	395	.shutdown = ohci_shutdown,
39a269c0 AV	396
	397	/*
	398	* managing i/o requests and associated device resources
	399	*/
	400	.urb_enqueue = ohci_urb_enqueue,
	401	.urb_dequeue = ohci_urb_dequeue,
	402	.endpoint_disable = ohci_endpoint_disable,
	403
	404	/*
	405	* scheduling support
	406	*/
	407	.get_frame_number = ohci_get_frame,
	408
	409	/*
	410	* root hub support
	411	*/
aa6e52a3 TP	412	.hub_status_data = ohci_at91_hub_status_data,
aa6e52a3 TP	413	.hub_control = ohci_at91_hub_control,
39a269c0	414	#ifdef CONFIG_PM
68ba61b8 DB	415	.bus_suspend = ohci_bus_suspend,
68ba61b8 DB	416	.bus_resume = ohci_bus_resume,
39a269c0 AV	417	#endif
	418	.start_port_reset = ohci_start_port_reset,
	419	};
	420
	421	/-------------------------------------------------------------------------/
	422
aa6e52a3 TP	423	static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data)
	424	{
	425	struct platform_device *pdev = data;
	426	struct at91_usbh_data *pdata = pdev->dev.platform_data;
	427	int val, gpio, port;
	428
	429	/* From the GPIO notifying the over-current situation, find
	430	* out the corresponding port */
	431	gpio = irq_to_gpio(irq);
	432	for (port = 0; port < ARRAY_SIZE(pdata->overcurrent_pin); port++) {
	433	if (pdata->overcurrent_pin[port] == gpio)
	434	break;
	435	}
	436
	437	if (port == ARRAY_SIZE(pdata->overcurrent_pin)) {
	438	dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n");
	439	return IRQ_HANDLED;
	440	}
	441
	442	val = gpio_get_value(gpio);
	443
	444	/* When notified of an over-current situation, disable power
	445	on the corresponding port, and mark this port in
	446	over-current. */
	447	if (! val) {
	448	ohci_at91_usb_set_power(pdata, port, 0);
	449	pdata->overcurrent_status[port] = 1;
	450	pdata->overcurrent_changed[port] = 1;
	451	}
	452
	453	dev_dbg(& pdev->dev, "overcurrent situation %s\n",
	454	val ? "exited" : "notified");
	455
	456	return IRQ_HANDLED;
	457	}
	458
	459	/-------------------------------------------------------------------------/
	460
0365ee0a	461	static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)
39a269c0	462	{
4bde4a4c DB	463	struct at91_usbh_data *pdata = pdev->dev.platform_data;
	464	int i;
	465
	466	if (pdata) {
3d6fdf75	467	for (i = 0; i < ARRAY_SIZE(pdata->vbus_pin); i++) {
8a7a49d1	468	if (!gpio_is_valid(pdata->vbus_pin[i]))
4bde4a4c DB	469	continue;
4bde4a4c DB	470	gpio_request(pdata->vbus_pin[i], "ohci_vbus");
aa6e52a3 TP	471	ohci_at91_usb_set_power(pdata, i, 1);
	472	}
	473
	474	for (i = 0; i < ARRAY_SIZE(pdata->overcurrent_pin); i++) {
	475	int ret;
	476
8a7a49d1	477	if (!gpio_is_valid(pdata->overcurrent_pin[i]))
aa6e52a3 TP	478	continue;
	479	gpio_request(pdata->overcurrent_pin[i], "ohci_overcurrent");
	480
	481	ret = request_irq(gpio_to_irq(pdata->overcurrent_pin[i]),
	482	ohci_hcd_at91_overcurrent_irq,
	483	IRQF_SHARED, "ohci_overcurrent", pdev);
	484	if (ret) {
	485	gpio_free(pdata->overcurrent_pin[i]);
	486	dev_warn(& pdev->dev, "cannot get GPIO IRQ for overcurrent\n");
	487	}
4bde4a4c DB	488	}
	489	}
	490
0365ee0a DB	491	device_init_wakeup(&pdev->dev, 1);
0365ee0a DB	492	return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev);
39a269c0 AV	493	}
39a269c0 AV	494
0365ee0a	495	static int ohci_hcd_at91_drv_remove(struct platform_device *pdev)
39a269c0	496	{
4bde4a4c DB	497	struct at91_usbh_data *pdata = pdev->dev.platform_data;
	498	int i;
	499
	500	if (pdata) {
3d6fdf75	501	for (i = 0; i < ARRAY_SIZE(pdata->vbus_pin); i++) {
8a7a49d1	502	if (!gpio_is_valid(pdata->vbus_pin[i]))
4bde4a4c	503	continue;
aa6e52a3	504	ohci_at91_usb_set_power(pdata, i, 0);
4bde4a4c DB	505	gpio_free(pdata->vbus_pin[i]);
4bde4a4c DB	506	}
aa6e52a3 TP	507
aa6e52a3 TP	508	for (i = 0; i < ARRAY_SIZE(pdata->overcurrent_pin); i++) {
8a7a49d1	509	if (!gpio_is_valid(pdata->overcurrent_pin[i]))
aa6e52a3 TP	510	continue;
	511	free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev);
	512	gpio_free(pdata->overcurrent_pin[i]);
	513	}
4bde4a4c DB	514	}
4bde4a4c DB	515
0365ee0a	516	device_init_wakeup(&pdev->dev, 0);
421b4bf5 PZ	517	usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev);
421b4bf5 PZ	518	return 0;
39a269c0 AV	519	}
	520
	521	#ifdef CONFIG_PM
39a269c0	522
68ba61b8	523	static int
0365ee0a	524	ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg)
68ba61b8	525	{
0365ee0a DB	526	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	527	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	528
	529	if (device_may_wakeup(&pdev->dev))
	530	enable_irq_wake(hcd->irq);
0365ee0a DB	531
	532	/*
	533	* The integrated transceivers seem unable to notice disconnect,
	534	* reconnect, or wakeup without the 48 MHz clock active. so for
	535	* correctness, always discard connection state (using reset).
	536	*
	537	* REVISIT: some boards will be able to turn VBUS off...
	538	*/
	539	if (at91_suspend_entering_slow_clock()) {
	540	ohci_usb_reset (ohci);
869aa98c PV	541	/* flush the writes */
869aa98c PV	542	(void) ohci_readl (ohci, &ohci->regs->control);
ed077bb7	543	at91_stop_clock();
0365ee0a	544	}
39a269c0 AV	545
	546	return 0;
	547	}
	548
0365ee0a	549	static int ohci_hcd_at91_drv_resume(struct platform_device *pdev)
39a269c0	550	{
6dde896e MP	551	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	552
	553	if (device_may_wakeup(&pdev->dev))
	554	disable_irq_wake(hcd->irq);
	555
ed077bb7 AV	556	if (!clocked)
ed077bb7 AV	557	at91_start_clock();
39a269c0	558
43bbb7e0	559	ohci_finish_controller_resume(hcd);
39a269c0 AV	560	return 0;
	561	}
	562	#else
	563	#define ohci_hcd_at91_drv_suspend NULL
	564	#define ohci_hcd_at91_drv_resume NULL
	565	#endif
	566
f4fce61d	567	MODULE_ALIAS("platform:at91_ohci");
68ba61b8	568
39a269c0 AV	569	static struct platform_driver ohci_hcd_at91_driver = {
	570	.probe = ohci_hcd_at91_drv_probe,
	571	.remove = ohci_hcd_at91_drv_remove,
64a21d02	572	.shutdown = usb_hcd_platform_shutdown,
39a269c0 AV	573	.suspend = ohci_hcd_at91_drv_suspend,
	574	.resume = ohci_hcd_at91_drv_resume,
	575	.driver = {
0365ee0a	576	.name = "at91_ohci",
39a269c0 AV	577	.owner = THIS_MODULE,
	578	},
	579	};