[mirror_ubuntu-artful-kernel.git] / drivers / usb / host / ohci-omap.c

/*
 * OHCI HCD (Host Controller Driver) for USB.
 *
 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
 * (C) Copyright 2000-2005 David Brownell
 * (C) Copyright 2002 Hewlett-Packard Company
 *
 * OMAP Bus Glue
 *
 * Modified for OMAP by Tony Lindgren <tony@atomide.com>
 * Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc.
 * and on ohci-sa1111.c by Christopher Hoover <ch@hpl.hp.com>
 *
 * This file is licenced under the GPL.
 */

#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/usb/otg.h>
#include <linux/platform_device.h>
#include <linux/signal.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>

#include "ohci.h"

#include <asm/io.h>
#include <asm/mach-types.h>

#include <mach/mux.h>

#include <mach/hardware.h>
#include <mach/usb.h>


/* OMAP-1510 OHCI has its own MMU for DMA */
#define OMAP1510_LB_MEMSIZE	32	/* Should be same as SDRAM size */
#define OMAP1510_LB_CLOCK_DIV	0xfffec10c
#define OMAP1510_LB_MMU_CTL	0xfffec208
#define OMAP1510_LB_MMU_LCK	0xfffec224
#define OMAP1510_LB_MMU_LD_TLB	0xfffec228
#define OMAP1510_LB_MMU_CAM_H	0xfffec22c
#define OMAP1510_LB_MMU_CAM_L	0xfffec230
#define OMAP1510_LB_MMU_RAM_H	0xfffec234
#define OMAP1510_LB_MMU_RAM_L	0xfffec238

#define DRIVER_DESC "OHCI OMAP driver"

#ifdef CONFIG_TPS65010
#include <linux/i2c/tps65010.h>
#else

#define LOW	0
#define HIGH	1

#define GPIO1	1

static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
{
	return 0;
}

#endif

static struct clk *usb_host_ck;
static struct clk *usb_dc_ck;

static const char hcd_name[] = "ohci-omap";
static struct hc_driver __read_mostly ohci_omap_hc_driver;

static void omap_ohci_clock_power(int on)
{
	if (on) {
		clk_enable(usb_dc_ck);
		clk_enable(usb_host_ck);
		/* guesstimate for T5 == 1x 32K clock + APLL lock time */
		udelay(100);
	} else {
		clk_disable(usb_host_ck);
		clk_disable(usb_dc_ck);
	}
}

/*
 * Board specific gang-switched transceiver power on/off.
 * NOTE:  OSK supplies power from DC, not battery.
 */
static int omap_ohci_transceiver_power(int on)
{
	if (on) {
		if (machine_is_omap_innovator() && cpu_is_omap1510())
			__raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
				| ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
			       INNOVATOR_FPGA_CAM_USB_CONTROL);
		else if (machine_is_omap_osk())
			tps65010_set_gpio_out_value(GPIO1, LOW);
	} else {
		if (machine_is_omap_innovator() && cpu_is_omap1510())
			__raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
				& ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
			       INNOVATOR_FPGA_CAM_USB_CONTROL);
		else if (machine_is_omap_osk())
			tps65010_set_gpio_out_value(GPIO1, HIGH);
	}

	return 0;
}

#ifdef CONFIG_ARCH_OMAP15XX
/*
 * OMAP-1510 specific Local Bus clock on/off
 */
static int omap_1510_local_bus_power(int on)
{
	if (on) {
		omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
		udelay(200);
	} else {
		omap_writel(0, OMAP1510_LB_MMU_CTL);
	}

	return 0;
}

/*
 * OMAP-1510 specific Local Bus initialization
 * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
 *       See also arch/mach-omap/memory.h for __virt_to_dma() and
 *       __dma_to_virt() which need to match with the physical
 *       Local Bus address below.
 */
static int omap_1510_local_bus_init(void)
{
	unsigned int tlb;
	unsigned long lbaddr, physaddr;

	omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
	       OMAP1510_LB_CLOCK_DIV);

	/* Configure the Local Bus MMU table */
	for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
		lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
		physaddr = tlb * 0x00100000 + PHYS_OFFSET;
		omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
		omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
		       OMAP1510_LB_MMU_CAM_L);
		omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
		omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
		omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
		omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
	}

	/* Enable the walking table */
	omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
	udelay(200);

	return 0;
}
#else
#define omap_1510_local_bus_power(x)	{}
#define omap_1510_local_bus_init()	{}
#endif

#ifdef	CONFIG_USB_OTG

static void start_hnp(struct ohci_hcd *ohci)
{
	struct usb_hcd *hcd = ohci_to_hcd(ohci);
	const unsigned	port = hcd->self.otg_port - 1;
	unsigned long	flags;
	u32 l;

	otg_start_hnp(hcd->usb_phy->otg);

	local_irq_save(flags);
	hcd->usb_phy->otg->state = OTG_STATE_A_SUSPEND;
	writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
	l = omap_readl(OTG_CTRL);
	l &= ~OTG_A_BUSREQ;
	omap_writel(l, OTG_CTRL);
	local_irq_restore(flags);
}

#endif

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

static int ohci_omap_reset(struct usb_hcd *hcd)
{
	struct ohci_hcd		*ohci = hcd_to_ohci(hcd);
	struct omap_usb_config	*config = dev_get_platdata(hcd->self.controller);
	int			need_transceiver = (config->otg != 0);
	int			ret;

	dev_dbg(hcd->self.controller, "starting USB Controller\n");

	if (config->otg) {
		hcd->self.otg_port = config->otg;
		/* default/minimum OTG power budget:  8 mA */
		hcd->power_budget = 8;
	}

	/* boards can use OTG transceivers in non-OTG modes */
	need_transceiver = need_transceiver
			|| machine_is_omap_h2() || machine_is_omap_h3();

	/* XXX OMAP16xx only */
	if (config->ocpi_enable)
		config->ocpi_enable();

#ifdef	CONFIG_USB_OTG
	if (need_transceiver) {
		hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
		if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
			int	status = otg_set_host(hcd->usb_phy->otg,
						&ohci_to_hcd(ohci)->self);
			dev_dbg(hcd->self.controller, "init %s phy, status %d\n",
					hcd->usb_phy->label, status);
			if (status) {
				usb_put_phy(hcd->usb_phy);
				return status;
			}
		} else {
			dev_err(hcd->self.controller, "can't find phy\n");
			return -ENODEV;
		}
		ohci->start_hnp = start_hnp;
	}
#endif

	omap_ohci_clock_power(1);

	if (cpu_is_omap15xx()) {
		omap_1510_local_bus_power(1);
		omap_1510_local_bus_init();
	}

	ret = ohci_setup(hcd);
	if (ret < 0)
		return ret;

	if (config->otg || config->rwc) {
		ohci->hc_control = OHCI_CTRL_RWC;
		writel(OHCI_CTRL_RWC, &ohci->regs->control);
	}

	/* board-specific power switching and overcurrent support */
	if (machine_is_omap_osk() || machine_is_omap_innovator()) {
		u32	rh = roothub_a (ohci);

		/* power switching (ganged by default) */
		rh &= ~RH_A_NPS;

		/* TPS2045 switch for internal transceiver (port 1) */
		if (machine_is_omap_osk()) {
			ohci_to_hcd(ohci)->power_budget = 250;

			rh &= ~RH_A_NOCP;

			/* gpio9 for overcurrent detction */
			omap_cfg_reg(W8_1610_GPIO9);
			gpio_request(9, "OHCI overcurrent");
			gpio_direction_input(9);

			/* for paranoia's sake:  disable USB.PUEN */
			omap_cfg_reg(W4_USB_HIGHZ);
		}
		ohci_writel(ohci, rh, &ohci->regs->roothub.a);
		ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
	} else if (machine_is_nokia770()) {
		/* We require a self-powered hub, which should have
		 * plenty of power. */
		ohci_to_hcd(ohci)->power_budget = 0;
	}

	/* FIXME hub_wq hub requests should manage power switching */
	omap_ohci_transceiver_power(1);

	/* board init will have already handled HMC and mux setup.
	 * any external transceiver should already be initialized
	 * too, so all configured ports use the right signaling now.
	 */

	return 0;
}

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

/**
 * ohci_hcd_omap_probe - initialize OMAP-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 ohci_hcd_omap_probe(struct platform_device *pdev)
{
	int retval, irq;
	struct usb_hcd *hcd = 0;

	if (pdev->num_resources != 2) {
		dev_err(&pdev->dev, "invalid num_resources: %i\n",
		       pdev->num_resources);
		return -ENODEV;
	}

	if (pdev->resource[0].flags != IORESOURCE_MEM
			|| pdev->resource[1].flags != IORESOURCE_IRQ) {
		dev_err(&pdev->dev, "invalid resource type\n");
		return -ENODEV;
	}

	usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
	if (IS_ERR(usb_host_ck))
		return PTR_ERR(usb_host_ck);

	if (!cpu_is_omap15xx())
		usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
	else
		usb_dc_ck = clk_get(&pdev->dev, "lb_ck");

	if (IS_ERR(usb_dc_ck)) {
		clk_put(usb_host_ck);
		return PTR_ERR(usb_dc_ck);
	}


	hcd = usb_create_hcd(&ohci_omap_hc_driver, &pdev->dev,
			dev_name(&pdev->dev));
	if (!hcd) {
		retval = -ENOMEM;
		goto err0;
	}
	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)) {
		dev_dbg(&pdev->dev, "request_mem_region failed\n");
		retval = -EBUSY;
		goto err1;
	}

	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs) {
		dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
		retval = -ENOMEM;
		goto err2;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		retval = -ENXIO;
		goto err3;
	}
	retval = usb_add_hcd(hcd, irq, 0);
	if (retval)
		goto err3;

	device_wakeup_enable(hcd->self.controller);
	return 0;
err3:
	iounmap(hcd->regs);
err2:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err1:
	usb_put_hcd(hcd);
err0:
	clk_put(usb_dc_ck);
	clk_put(usb_host_ck);
	return retval;
}


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

/**
 * ohci_hcd_omap_remove - shutdown processing for OMAP-based HCDs
 * @dev: USB Host Controller being removed
 * Context: !in_interrupt()
 *
 * Reverses the effect of ohci_hcd_omap_probe(), first invoking
 * the HCD's stop() method.  It is always called from a thread
 * context, normally "rmmod", "apmd", or something similar.
 */
static int ohci_hcd_omap_remove(struct platform_device *pdev)
{
	struct usb_hcd	*hcd = platform_get_drvdata(pdev);

	dev_dbg(hcd->self.controller, "stopping USB Controller\n");
	usb_remove_hcd(hcd);
	omap_ohci_clock_power(0);
	if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
		(void) otg_set_host(hcd->usb_phy->otg, 0);
		usb_put_phy(hcd->usb_phy);
	}
	if (machine_is_omap_osk())
		gpio_free(9);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
	clk_put(usb_dc_ck);
	clk_put(usb_host_ck);
	return 0;
}

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

#ifdef	CONFIG_PM

static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	bool do_wakeup = device_may_wakeup(&pdev->dev);
	int ret;

	if (time_before(jiffies, ohci->next_statechange))
		msleep(5);
	ohci->next_statechange = jiffies;

	ret = ohci_suspend(hcd, do_wakeup);
	if (ret)
		return ret;

	omap_ohci_clock_power(0);
	return ret;
}

static int ohci_omap_resume(struct platform_device *dev)
{
	struct usb_hcd	*hcd = platform_get_drvdata(dev);
	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);

	if (time_before(jiffies, ohci->next_statechange))
		msleep(5);
	ohci->next_statechange = jiffies;

	omap_ohci_clock_power(1);
	ohci_resume(hcd, false);
	return 0;
}

#endif

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

/*
 * Driver definition to register with the OMAP bus
 */
static struct platform_driver ohci_hcd_omap_driver = {
	.probe		= ohci_hcd_omap_probe,
	.remove		= ohci_hcd_omap_remove,
	.shutdown	= usb_hcd_platform_shutdown,
#ifdef	CONFIG_PM
	.suspend	= ohci_omap_suspend,
	.resume		= ohci_omap_resume,
#endif
	.driver		= {
		.name	= "ohci",
	},
};

static const struct ohci_driver_overrides omap_overrides __initconst = {
	.product_desc	= "OMAP OHCI",
	.reset		= ohci_omap_reset
};

static int __init ohci_omap_init(void)
{
	if (usb_disabled())
		return -ENODEV;

	pr_info("%s: " DRIVER_DESC "\n", hcd_name);

	ohci_init_driver(&ohci_omap_hc_driver, &omap_overrides);
	return platform_driver_register(&ohci_hcd_omap_driver);
}
module_init(ohci_omap_init);

static void __exit ohci_omap_cleanup(void)
{
	platform_driver_unregister(&ohci_hcd_omap_driver);
}
module_exit(ohci_omap_cleanup);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_ALIAS("platform:ohci");
MODULE_LICENSE("GPL");
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 2000-2005 David Brownell
	6	* (C) Copyright 2002 Hewlett-Packard Company
bd35078f	7	*
1da177e4 LT	8	* OMAP Bus Glue
	9	*
	10	* Modified for OMAP by Tony Lindgren <tony@atomide.com>
	11	* Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc.
	12	* and on ohci-sa1111.c by Christopher Hoover <ch@hpl.hp.com>
	13	*
	14	* This file is licenced under the GPL.
	15	*/
	16
f8ce2547	17	#include <linux/clk.h>
de57a154	18	#include <linux/dma-mapping.h>
ded017ee	19	#include <linux/err.h>
944e1bff	20	#include <linux/gpio.h>
de57a154 MG	21	#include <linux/io.h>
	22	#include <linux/jiffies.h>
	23	#include <linux/kernel.h>
	24	#include <linux/module.h>
	25	#include <linux/usb/otg.h>
	26	#include <linux/platform_device.h>
	27	#include <linux/signal.h>
	28	#include <linux/usb.h>
	29	#include <linux/usb/hcd.h>
	30
	31	#include "ohci.h"
4e57b681	32
1da177e4 LT	33	#include <asm/io.h>
	34	#include <asm/mach-types.h>
	35
70c494c3	36	#include <mach/mux.h>
b924b204 TL	37
b924b204 TL	38	#include <mach/hardware.h>
b924b204	39	#include <mach/usb.h>
1da177e4 LT	40
	41
	42	/* OMAP-1510 OHCI has its own MMU for DMA */
	43	#define OMAP1510_LB_MEMSIZE 32 /* Should be same as SDRAM size */
	44	#define OMAP1510_LB_CLOCK_DIV 0xfffec10c
	45	#define OMAP1510_LB_MMU_CTL 0xfffec208
	46	#define OMAP1510_LB_MMU_LCK 0xfffec224
	47	#define OMAP1510_LB_MMU_LD_TLB 0xfffec228
	48	#define OMAP1510_LB_MMU_CAM_H 0xfffec22c
	49	#define OMAP1510_LB_MMU_CAM_L 0xfffec230
	50	#define OMAP1510_LB_MMU_RAM_H 0xfffec234
	51	#define OMAP1510_LB_MMU_RAM_L 0xfffec238
	52
de57a154	53	#define DRIVER_DESC "OHCI OMAP driver"
1da177e4 LT	54
1da177e4 LT	55	#ifdef CONFIG_TPS65010
6d16bfb5	56	#include <linux/i2c/tps65010.h>
1da177e4 LT	57	#else
	58
	59	#define LOW 0
	60	#define HIGH 1
	61
	62	#define GPIO1 1
	63
	64	static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
	65	{
	66	return 0;
	67	}
	68
	69	#endif
	70
1da177e4	71	static struct clk *usb_host_ck;
bd35078f	72	static struct clk *usb_dc_ck;
de57a154 MG	73
	74	static const char hcd_name[] = "ohci-omap";
	75	static struct hc_driver __read_mostly ohci_omap_hc_driver;
1da177e4 LT	76
	77	static void omap_ohci_clock_power(int on)
	78	{
	79	if (on) {
bd35078f	80	clk_enable(usb_dc_ck);
1da177e4 LT	81	clk_enable(usb_host_ck);
	82	/* guesstimate for T5 == 1x 32K clock + APLL lock time */
	83	udelay(100);
	84	} else {
	85	clk_disable(usb_host_ck);
bd35078f	86	clk_disable(usb_dc_ck);
1da177e4 LT	87	}
	88	}
	89
	90	/*
	91	* Board specific gang-switched transceiver power on/off.
	92	* NOTE: OSK supplies power from DC, not battery.
	93	*/
	94	static int omap_ohci_transceiver_power(int on)
	95	{
	96	if (on) {
	97	if (machine_is_omap_innovator() && cpu_is_omap1510())
4c98dc6b	98	__raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
bd35078f	99	\| ((1 << 5/usb1/) \| (1 << 3/usb2/)),
1da177e4 LT	100	INNOVATOR_FPGA_CAM_USB_CONTROL);
	101	else if (machine_is_omap_osk())
	102	tps65010_set_gpio_out_value(GPIO1, LOW);
	103	} else {
	104	if (machine_is_omap_innovator() && cpu_is_omap1510())
4c98dc6b	105	__raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
bd35078f	106	& ~((1 << 5/usb1/) \| (1 << 3/usb2/)),
1da177e4 LT	107	INNOVATOR_FPGA_CAM_USB_CONTROL);
	108	else if (machine_is_omap_osk())
	109	tps65010_set_gpio_out_value(GPIO1, HIGH);
	110	}
	111
	112	return 0;
	113	}
	114
bd35078f	115	#ifdef CONFIG_ARCH_OMAP15XX
1da177e4 LT	116	/*
	117	* OMAP-1510 specific Local Bus clock on/off
	118	*/
	119	static int omap_1510_local_bus_power(int on)
	120	{
	121	if (on) {
	122	omap_writel((1 << 1) \| (1 << 0), OMAP1510_LB_MMU_CTL);
	123	udelay(200);
	124	} else {
	125	omap_writel(0, OMAP1510_LB_MMU_CTL);
	126	}
	127
	128	return 0;
	129	}
	130
	131	/*
	132	* OMAP-1510 specific Local Bus initialization
	133	* NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
bd35078f DB	134	* See also arch/mach-omap/memory.h for __virt_to_dma() and
bd35078f DB	135	* __dma_to_virt() which need to match with the physical
1da177e4 LT	136	* Local Bus address below.
	137	*/
	138	static int omap_1510_local_bus_init(void)
	139	{
	140	unsigned int tlb;
	141	unsigned long lbaddr, physaddr;
	142
bd35078f	143	omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) \| 0x4,
1da177e4 LT	144	OMAP1510_LB_CLOCK_DIV);
	145
	146	/* Configure the Local Bus MMU table */
	147	for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
	148	lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
	149	physaddr = tlb * 0x00100000 + PHYS_OFFSET;
	150	omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
bd35078f	151	omap_writel(((lbaddr & 0x003ffc00) >> 6) \| 0xc,
1da177e4 LT	152	OMAP1510_LB_MMU_CAM_L);
	153	omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
	154	omap_writel((physaddr & 0x0000fc00) \| 0x300, OMAP1510_LB_MMU_RAM_L);
	155	omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
	156	omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
	157	}
	158
	159	/* Enable the walking table */
	160	omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) \| (1 << 3), OMAP1510_LB_MMU_CTL);
	161	udelay(200);
	162
	163	return 0;
	164	}
bd35078f DB	165	#else
	166	#define omap_1510_local_bus_power(x) {}
	167	#define omap_1510_local_bus_init() {}
	168	#endif
1da177e4 LT	169
	170	#ifdef CONFIG_USB_OTG
	171
	172	static void start_hnp(struct ohci_hcd *ohci)
	173	{
c2e935a7 RZ	174	struct usb_hcd *hcd = ohci_to_hcd(ohci);
c2e935a7 RZ	175	const unsigned port = hcd->self.otg_port - 1;
1da177e4	176	unsigned long flags;
f35ae634	177	u32 l;
1da177e4	178
3d46e73d	179	otg_start_hnp(hcd->usb_phy->otg);
1da177e4 LT	180
1da177e4 LT	181	local_irq_save(flags);
7e1bbeb4	182	hcd->usb_phy->otg->state = OTG_STATE_A_SUSPEND;
1da177e4	183	writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
f35ae634 TL	184	l = omap_readl(OTG_CTRL);
	185	l &= ~OTG_A_BUSREQ;
	186	omap_writel(l, OTG_CTRL);
1da177e4 LT	187	local_irq_restore(flags);
	188	}
	189
	190	#endif
	191
	192	/-------------------------------------------------------------------------/
	193
de57a154	194	static int ohci_omap_reset(struct usb_hcd *hcd)
1da177e4	195	{
bd35078f	196	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
d4f09e28	197	struct omap_usb_config *config = dev_get_platdata(hcd->self.controller);
1da177e4 LT	198	int need_transceiver = (config->otg != 0);
	199	int ret;
	200
bd35078f	201	dev_dbg(hcd->self.controller, "starting USB Controller\n");
1da177e4 LT	202
1da177e4 LT	203	if (config->otg) {
de57a154	204	hcd->self.otg_port = config->otg;
1da177e4	205	/* default/minimum OTG power budget: 8 mA */
de57a154	206	hcd->power_budget = 8;
1da177e4 LT	207	}
	208
	209	/* boards can use OTG transceivers in non-OTG modes */
	210	need_transceiver = need_transceiver
	211	\|\| machine_is_omap_h2() \|\| machine_is_omap_h3();
	212
d3645d39 PW	213	/* XXX OMAP16xx only */
	214	if (config->ocpi_enable)
	215	config->ocpi_enable();
1da177e4	216
c3df1a26	217	#ifdef CONFIG_USB_OTG
1da177e4	218	if (need_transceiver) {
3d46e73d AT	219	hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
	220	if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
	221	int status = otg_set_host(hcd->usb_phy->otg,
1da177e4	222	&ohci_to_hcd(ohci)->self);
c2e935a7	223	dev_dbg(hcd->self.controller, "init %s phy, status %d\n",
3d46e73d	224	hcd->usb_phy->label, status);
1da177e4	225	if (status) {
3d46e73d	226	usb_put_phy(hcd->usb_phy);
1da177e4 LT	227	return status;
	228	}
	229	} else {
c2e935a7	230	dev_err(hcd->self.controller, "can't find phy\n");
1da177e4 LT	231	return -ENODEV;
1da177e4 LT	232	}
e8b24450	233	ohci->start_hnp = start_hnp;
1da177e4 LT	234	}
	235	#endif
	236
	237	omap_ohci_clock_power(1);
	238
9b466c3b	239	if (cpu_is_omap15xx()) {
1da177e4 LT	240	omap_1510_local_bus_power(1);
	241	omap_1510_local_bus_init();
	242	}
	243
de57a154 MG	244	ret = ohci_setup(hcd);
de57a154 MG	245	if (ret < 0)
1da177e4 LT	246	return ret;
1da177e4 LT	247
de57a154 MG	248	if (config->otg \|\| config->rwc) {
	249	ohci->hc_control = OHCI_CTRL_RWC;
	250	writel(OHCI_CTRL_RWC, &ohci->regs->control);
	251	}
	252
1da177e4 LT	253	/* board-specific power switching and overcurrent support */
	254	if (machine_is_omap_osk() \|\| machine_is_omap_innovator()) {
	255	u32 rh = roothub_a (ohci);
	256
	257	/* power switching (ganged by default) */
	258	rh &= ~RH_A_NPS;
	259
	260	/* TPS2045 switch for internal transceiver (port 1) */
	261	if (machine_is_omap_osk()) {
bc96c0ad	262	ohci_to_hcd(ohci)->power_budget = 250;
1da177e4 LT	263
	264	rh &= ~RH_A_NOCP;
	265
	266	/* gpio9 for overcurrent detction */
	267	omap_cfg_reg(W8_1610_GPIO9);
944e1bff	268	gpio_request(9, "OHCI overcurrent");
40e3925b	269	gpio_direction_input(9);
1da177e4 LT	270
	271	/* for paranoia's sake: disable USB.PUEN */
	272	omap_cfg_reg(W4_USB_HIGHZ);
	273	}
	274	ohci_writel(ohci, rh, &ohci->regs->roothub.a);
1133cd8a	275	ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
bd35078f DB	276	} else if (machine_is_nokia770()) {
	277	/* We require a self-powered hub, which should have
	278	* plenty of power. */
	279	ohci_to_hcd(ohci)->power_budget = 0;
1da177e4 LT	280	}
1da177e4 LT	281
37ebb549	282	/* FIXME hub_wq hub requests should manage power switching */
1da177e4 LT	283	omap_ohci_transceiver_power(1);
	284
	285	/* board init will have already handled HMC and mux setup.
	286	* any external transceiver should already be initialized
	287	* too, so all configured ports use the right signaling now.
	288	*/
	289
	290	return 0;
	291	}
	292
1da177e4 LT	293	/-------------------------------------------------------------------------/
1da177e4 LT	294
1da177e4	295	/**
1b43a852	296	* ohci_hcd_omap_probe - initialize OMAP-based HCDs
1da177e4 LT	297	* Context: !in_interrupt()
	298	*
	299	* Allocates basic resources for this USB host controller, and
	300	* then invokes the start() method for the HCD associated with it
	301	* through the hotplug entry's driver_data.
	302	*/
1b43a852	303	static int ohci_hcd_omap_probe(struct platform_device *pdev)
1da177e4	304	{
48944738	305	int retval, irq;
1da177e4	306	struct usb_hcd *hcd = 0;
1da177e4 LT	307
1da177e4 LT	308	if (pdev->num_resources != 2) {
0a3aa0d3	309	dev_err(&pdev->dev, "invalid num_resources: %i\n",
1da177e4 LT	310	pdev->num_resources);
	311	return -ENODEV;
	312	}
	313
bd35078f	314	if (pdev->resource[0].flags != IORESOURCE_MEM
1da177e4	315	\|\| pdev->resource[1].flags != IORESOURCE_IRQ) {
0a3aa0d3	316	dev_err(&pdev->dev, "invalid resource type\n");
1da177e4 LT	317	return -ENODEV;
	318	}
	319
953a7e84	320	usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
1da177e4 LT	321	if (IS_ERR(usb_host_ck))
	322	return PTR_ERR(usb_host_ck);
	323
9b466c3b	324	if (!cpu_is_omap15xx())
953a7e84	325	usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
bd35078f	326	else
953a7e84	327	usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
bd35078f DB	328
	329	if (IS_ERR(usb_dc_ck)) {
	330	clk_put(usb_host_ck);
	331	return PTR_ERR(usb_dc_ck);
	332	}
	333
	334
1b43a852 MG	335	hcd = usb_create_hcd(&ohci_omap_hc_driver, &pdev->dev,
1b43a852 MG	336	dev_name(&pdev->dev));
1da177e4 LT	337	if (!hcd) {
	338	retval = -ENOMEM;
	339	goto err0;
	340	}
	341	hcd->rsrc_start = pdev->resource[0].start;
	342	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
	343
	344	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
	345	dev_dbg(&pdev->dev, "request_mem_region failed\n");
	346	retval = -EBUSY;
	347	goto err1;
	348	}
	349
55c381e4 RK	350	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	351	if (!hcd->regs) {
	352	dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
	353	retval = -ENOMEM;
	354	goto err2;
	355	}
1da177e4	356
48944738 DV	357	irq = platform_get_irq(pdev, 0);
	358	if (irq < 0) {
	359	retval = -ENXIO;
55c381e4	360	goto err3;
48944738	361	}
b5dd18d8	362	retval = usb_add_hcd(hcd, irq, 0);
bd35078f	363	if (retval)
55c381e4	364	goto err3;
bd35078f	365
3c9740a1	366	device_wakeup_enable(hcd->self.controller);
bd35078f	367	return 0;
55c381e4 RK	368	err3:
55c381e4 RK	369	iounmap(hcd->regs);
1da177e4 LT	370	err2:
	371	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	372	err1:
	373	usb_put_hcd(hcd);
	374	err0:
bd35078f	375	clk_put(usb_dc_ck);
1da177e4 LT	376	clk_put(usb_host_ck);
	377	return retval;
	378	}
	379
	380
	381	/* may be called with controller, bus, and devices active */
	382
	383	/**
1b43a852	384	* ohci_hcd_omap_remove - shutdown processing for OMAP-based HCDs
1da177e4 LT	385	* @dev: USB Host Controller being removed
	386	* Context: !in_interrupt()
	387	*
1b43a852	388	* Reverses the effect of ohci_hcd_omap_probe(), first invoking
1da177e4 LT	389	* the HCD's stop() method. It is always called from a thread
1da177e4 LT	390	* context, normally "rmmod", "apmd", or something similar.
1da177e4	391	*/
1b43a852	392	static int ohci_hcd_omap_remove(struct platform_device *pdev)
1da177e4	393	{
1b43a852 MG	394	struct usb_hcd *hcd = platform_get_drvdata(pdev);
1b43a852 MG	395
de57a154	396	dev_dbg(hcd->self.controller, "stopping USB Controller\n");
1da177e4	397	usb_remove_hcd(hcd);
de57a154	398	omap_ohci_clock_power(0);
3d46e73d AT	399	if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
	400	(void) otg_set_host(hcd->usb_phy->otg, 0);
	401	usb_put_phy(hcd->usb_phy);
bd35078f	402	}
1da177e4	403	if (machine_is_omap_osk())
944e1bff	404	gpio_free(9);
55c381e4	405	iounmap(hcd->regs);
1da177e4 LT	406	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
1da177e4 LT	407	usb_put_hcd(hcd);
bd35078f	408	clk_put(usb_dc_ck);
1da177e4	409	clk_put(usb_host_ck);
1da177e4 LT	410	return 0;
	411	}
	412
	413	/-------------------------------------------------------------------------/
	414
	415	#ifdef CONFIG_PM
	416
10abfa13	417	static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message)
1da177e4	418	{
10abfa13 MG	419	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	420	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	421	bool do_wakeup = device_may_wakeup(&pdev->dev);
	422	int ret;
f197b2c5 DB	423
	424	if (time_before(jiffies, ohci->next_statechange))
	425	msleep(5);
	426	ohci->next_statechange = jiffies;
	427
10abfa13 MG	428	ret = ohci_suspend(hcd, do_wakeup);
	429	if (ret)
	430	return ret;
	431
f197b2c5	432	omap_ohci_clock_power(0);
10abfa13	433	return ret;
1da177e4 LT	434	}
1da177e4 LT	435
3ae5eaec	436	static int ohci_omap_resume(struct platform_device *dev)
1da177e4	437	{
43bbb7e0 AS	438	struct usb_hcd *hcd = platform_get_drvdata(dev);
43bbb7e0 AS	439	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
1da177e4	440
b404a5b0 DB	441	if (time_before(jiffies, ohci->next_statechange))
	442	msleep(5);
	443	ohci->next_statechange = jiffies;
f197b2c5	444
b404a5b0	445	omap_ohci_clock_power(1);
cfa49b4b	446	ohci_resume(hcd, false);
f197b2c5	447	return 0;
1da177e4 LT	448	}
	449
	450	#endif
	451
	452	/-------------------------------------------------------------------------/
	453
	454	/*
	455	* Driver definition to register with the OMAP bus
	456	*/
3ae5eaec	457	static struct platform_driver ohci_hcd_omap_driver = {
1b43a852 MG	458	.probe = ohci_hcd_omap_probe,
1b43a852 MG	459	.remove = ohci_hcd_omap_remove,
dd9048af	460	.shutdown = usb_hcd_platform_shutdown,
1da177e4 LT	461	#ifdef CONFIG_PM
	462	.suspend = ohci_omap_suspend,
	463	.resume = ohci_omap_resume,
	464	#endif
3ae5eaec	465	.driver = {
3ae5eaec RK	466	.name = "ohci",
3ae5eaec RK	467	},
1da177e4 LT	468	};
1da177e4 LT	469
de57a154 MG	470	static const struct ohci_driver_overrides omap_overrides __initconst = {
	471	.product_desc = "OMAP OHCI",
	472	.reset = ohci_omap_reset
	473	};
	474
	475	static int __init ohci_omap_init(void)
	476	{
	477	if (usb_disabled())
	478	return -ENODEV;
	479
	480	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	481
	482	ohci_init_driver(&ohci_omap_hc_driver, &omap_overrides);
	483	return platform_driver_register(&ohci_hcd_omap_driver);
	484	}
	485	module_init(ohci_omap_init);
	486
	487	static void __exit ohci_omap_cleanup(void)
	488	{
	489	platform_driver_unregister(&ohci_hcd_omap_driver);
	490	}
	491	module_exit(ohci_omap_cleanup);
	492
	493	MODULE_DESCRIPTION(DRIVER_DESC);
f4fce61d	494	MODULE_ALIAS("platform:ohci");
de57a154	495	MODULE_LICENSE("GPL");