[deliverable/linux.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/signal.h>	/* IRQF_DISABLED */
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/clk.h>

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

#include <asm/arch/mux.h>
#include <asm/arch/irqs.h>
#include <asm/arch/gpio.h>
#include <asm/arch/fpga.h>
#include <asm/arch/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


#ifndef CONFIG_ARCH_OMAP
#error "This file is OMAP bus glue.  CONFIG_OMAP must be defined."
#endif

#ifdef CONFIG_TPS65010
#include <asm/arch/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

extern int usb_disabled(void);
extern int ocpi_enable(void);

static struct clk *usb_host_ck;

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

/*
 * 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;
}

#ifdef	CONFIG_USB_OTG

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

	otg_start_hnp(ohci->transceiver);

	local_irq_save(flags);
	ohci->transceiver->state = OTG_STATE_A_SUSPEND;
	writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
	OTG_CTRL_REG &= ~OTG_A_BUSREQ;
	local_irq_restore(flags);
}

#endif

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

static int omap_start_hc(struct ohci_hcd *ohci, struct platform_device *pdev)
{
	struct omap_usb_config	*config = pdev->dev.platform_data;
	int			need_transceiver = (config->otg != 0);
	int			ret;

	dev_dbg(&pdev->dev, "starting USB Controller\n");

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

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

	if (cpu_is_omap16xx())
		ocpi_enable();

#ifdef	CONFIG_ARCH_OMAP_OTG
	if (need_transceiver) {
		ohci->transceiver = otg_get_transceiver();
		if (ohci->transceiver) {
			int	status = otg_set_host(ohci->transceiver,
						&ohci_to_hcd(ohci)->self);
			dev_dbg(&pdev->dev, "init %s transceiver, status %d\n",
					ohci->transceiver->label, status);
			if (status) {
				if (ohci->transceiver)
					put_device(ohci->transceiver->dev);
				return status;
			}
		} else {
			dev_err(&pdev->dev, "can't find transceiver\n");
			return -ENODEV;
		}
	}
#endif

	omap_ohci_clock_power(1);

	if (cpu_is_omap1510()) {
		omap_1510_local_bus_power(1);
		omap_1510_local_bus_init();
	}

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

	/* 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);
			omap_request_gpio(9);
			omap_set_gpio_direction(9, 1 /* IN */);

			/* for paranoia's sake:  disable USB.PUEN */
			omap_cfg_reg(W4_USB_HIGHZ);
		}
		ohci_writel(ohci, rh, &ohci->regs->roothub.a);
		distrust_firmware = 0;
	}

	/* FIXME khubd 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;
}

static void omap_stop_hc(struct platform_device *pdev)
{
	dev_dbg(&pdev->dev, "stopping USB Controller\n");
	omap_ohci_clock_power(0);
}


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

void usb_hcd_omap_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_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.
 */
int usb_hcd_omap_probe (const struct hc_driver *driver,
			  struct platform_device *pdev)
{
	int retval, irq;
	struct usb_hcd *hcd = 0;
	struct ohci_hcd *ohci;

	if (pdev->num_resources != 2) {
		printk(KERN_ERR "hcd probe: invalid num_resources: %i\n", 
		       pdev->num_resources);
		return -ENODEV;
	}

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

	usb_host_ck = clk_get(0, "usb_hhc_ck");
	if (IS_ERR(usb_host_ck))
		return PTR_ERR(usb_host_ck);

	hcd = usb_create_hcd (driver, &pdev->dev, pdev->dev.bus_id);
	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 = (void __iomem *) (int) IO_ADDRESS(hcd->rsrc_start);

	ohci = hcd_to_ohci(hcd);
	ohci_hcd_init(ohci);

	retval = omap_start_hc(ohci, pdev);
	if (retval < 0)
		goto err2;

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		retval = -ENXIO;
		goto err2;
	}
	retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
	if (retval == 0)
		return retval;

	omap_stop_hc(pdev);
err2:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err1:
	usb_put_hcd(hcd);
err0:
	clk_put(usb_host_ck);
	return retval;
}


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

/**
 * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
 * @dev: USB Host Controller being removed
 * Context: !in_interrupt()
 *
 * Reverses the effect of usb_hcd_omap_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_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
{
	usb_remove_hcd(hcd);
	if (machine_is_omap_osk())
		omap_free_gpio(9);
	omap_stop_hc(pdev);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
	clk_put(usb_host_ck);
}

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

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

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

	if ((ret = ohci_run (ohci)) < 0) {
		dev_err(hcd->self.controller, "can't start\n");
		ohci_stop (hcd);
		return ret;
	}
	return 0;
}

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

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

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

	/*
	 * basic lifecycle operations
	 */
	.start =		ohci_omap_start,
	.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,
	.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_omap_drv_probe(struct platform_device *dev)
{
	return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
}

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

	usb_hcd_omap_remove(hcd, dev);
	if (ohci->transceiver) {
		(void) otg_set_host(ohci->transceiver, 0);
		put_device(ohci->transceiver->dev);
	}
	platform_set_drvdata(dev, NULL);

	return 0;
}

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

#ifdef	CONFIG_PM

static int ohci_omap_suspend(struct platform_device *dev, pm_message_t message)
{
	struct ohci_hcd	*ohci = hcd_to_ohci(platform_get_drvdata(dev));

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

	omap_ohci_clock_power(0);
	ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
	dev->power.power_state = PMSG_SUSPEND;
	return 0;
}

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

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

	omap_ohci_clock_power(1);
	dev->power.power_state = PMSG_ON;
	usb_hcd_resume_root_hub(dev_get_drvdata(dev));
	return 0;
}

#endif

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

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

static int __init ohci_hcd_omap_init (void)
{
	printk (KERN_DEBUG "%s: " DRIVER_INFO " (OMAP)\n", hcd_name);
	if (usb_disabled())
		return -ENODEV;

	pr_debug("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
		sizeof (struct ed), sizeof (struct td));

	return platform_driver_register(&ohci_hcd_omap_driver);
}

static void __exit ohci_hcd_omap_cleanup (void)
{
	platform_driver_unregister(&ohci_hcd_omap_driver);
}

module_init (ohci_hcd_omap_init);
module_exit (ohci_hcd_omap_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 2000-2005 David Brownell
	6	* (C) Copyright 2002 Hewlett-Packard Company
	7	*
	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
d54b5caa	17	#include <linux/signal.h> /* IRQF_DISABLED */
4e57b681	18	#include <linux/jiffies.h>
d052d1be	19	#include <linux/platform_device.h>
f8ce2547	20	#include <linux/clk.h>
4e57b681	21
1da177e4 LT	22	#include <asm/hardware.h>
	23	#include <asm/io.h>
	24	#include <asm/mach-types.h>
	25
1da177e4 LT	26	#include <asm/arch/mux.h>
	27	#include <asm/arch/irqs.h>
	28	#include <asm/arch/gpio.h>
	29	#include <asm/arch/fpga.h>
	30	#include <asm/arch/usb.h>
1da177e4 LT	31
	32
	33	/* OMAP-1510 OHCI has its own MMU for DMA */
	34	#define OMAP1510_LB_MEMSIZE 32 /* Should be same as SDRAM size */
	35	#define OMAP1510_LB_CLOCK_DIV 0xfffec10c
	36	#define OMAP1510_LB_MMU_CTL 0xfffec208
	37	#define OMAP1510_LB_MMU_LCK 0xfffec224
	38	#define OMAP1510_LB_MMU_LD_TLB 0xfffec228
	39	#define OMAP1510_LB_MMU_CAM_H 0xfffec22c
	40	#define OMAP1510_LB_MMU_CAM_L 0xfffec230
	41	#define OMAP1510_LB_MMU_RAM_H 0xfffec234
	42	#define OMAP1510_LB_MMU_RAM_L 0xfffec238
	43
	44
	45	#ifndef CONFIG_ARCH_OMAP
	46	#error "This file is OMAP bus glue. CONFIG_OMAP must be defined."
	47	#endif
	48
	49	#ifdef CONFIG_TPS65010
	50	#include <asm/arch/tps65010.h>
	51	#else
	52
	53	#define LOW 0
	54	#define HIGH 1
	55
	56	#define GPIO1 1
	57
	58	static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
	59	{
	60	return 0;
	61	}
	62
	63	#endif
	64
	65	extern int usb_disabled(void);
	66	extern int ocpi_enable(void);
	67
	68	static struct clk *usb_host_ck;
	69
	70	static void omap_ohci_clock_power(int on)
	71	{
	72	if (on) {
	73	clk_enable(usb_host_ck);
	74	/* guesstimate for T5 == 1x 32K clock + APLL lock time */
	75	udelay(100);
	76	} else {
	77	clk_disable(usb_host_ck);
	78	}
	79	}
	80
	81	/*
	82	* Board specific gang-switched transceiver power on/off.
	83	* NOTE: OSK supplies power from DC, not battery.
	84	*/
	85	static int omap_ohci_transceiver_power(int on)
	86	{
	87	if (on) {
	88	if (machine_is_omap_innovator() && cpu_is_omap1510())
	89	fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
	90	\| ((1 << 5/usb1/) \| (1 << 3/usb2/)),
	91	INNOVATOR_FPGA_CAM_USB_CONTROL);
	92	else if (machine_is_omap_osk())
	93	tps65010_set_gpio_out_value(GPIO1, LOW);
	94	} else {
95	if (machine_is_omap_innovator() && cpu_is_omap1510())
96	fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
97	& ~((1 << 5/usb1/) \| (1 << 3/usb2/)),
98	INNOVATOR_FPGA_CAM_USB_CONTROL);
99	else if (machine_is_omap_osk())
100	tps65010_set_gpio_out_value(GPIO1, HIGH);
101	}
102
103	return 0;
104	}
105
106	/*
107	* OMAP-1510 specific Local Bus clock on/off
108	*/
109	static int omap_1510_local_bus_power(int on)
110	{
111	if (on) {
112	omap_writel((1 << 1) \| (1 << 0), OMAP1510_LB_MMU_CTL);
113	udelay(200);
114	} else {
115	omap_writel(0, OMAP1510_LB_MMU_CTL);
116	}
117
118	return 0;
119	}
120
121	/*
122	* OMAP-1510 specific Local Bus initialization
123	* NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
124	* See also arch/mach-omap/memory.h for __virt_to_dma() and
125	* __dma_to_virt() which need to match with the physical
126	* Local Bus address below.
127	*/
128	static int omap_1510_local_bus_init(void)
129	{
130	unsigned int tlb;
131	unsigned long lbaddr, physaddr;
132
133	omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) \| 0x4,
134	OMAP1510_LB_CLOCK_DIV);
135
136	/* Configure the Local Bus MMU table */
137	for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
138	lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
139	physaddr = tlb * 0x00100000 + PHYS_OFFSET;
140	omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
141	omap_writel(((lbaddr & 0x003ffc00) >> 6) \| 0xc,
142	OMAP1510_LB_MMU_CAM_L);
143	omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
144	omap_writel((physaddr & 0x0000fc00) \| 0x300, OMAP1510_LB_MMU_RAM_L);
145	omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
146	omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
147	}
148
149	/* Enable the walking table */
150	omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) \| (1 << 3), OMAP1510_LB_MMU_CTL);
151	udelay(200);
152
153	return 0;
154	}
155
156	#ifdef CONFIG_USB_OTG
157
158	static void start_hnp(struct ohci_hcd *ohci)
159	{
160	const unsigned port = ohci_to_hcd(ohci)->self.otg_port - 1;
161	unsigned long flags;
162
163	otg_start_hnp(ohci->transceiver);
164
165	local_irq_save(flags);
166	ohci->transceiver->state = OTG_STATE_A_SUSPEND;
167	writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
168	OTG_CTRL_REG &= ~OTG_A_BUSREQ;
169	local_irq_restore(flags);
170	}
171
172	#endif
173
174	/-------------------------------------------------------------------------/
175
176	static int omap_start_hc(struct ohci_hcd ohci, struct platform_device pdev)
177	{
178	struct omap_usb_config *config = pdev->dev.platform_data;
179	int need_transceiver = (config->otg != 0);
180	int ret;
181
182	dev_dbg(&pdev->dev, "starting USB Controller\n");
183
184	if (config->otg) {
185	ohci_to_hcd(ohci)->self.otg_port = config->otg;
186	/* default/minimum OTG power budget: 8 mA */
bc96c0ad	187	ohci_to_hcd(ohci)->power_budget = 8;
1da177e4 LT	188	}
	189
	190	/* boards can use OTG transceivers in non-OTG modes */
	191	need_transceiver = need_transceiver
	192	\|\| machine_is_omap_h2() \|\| machine_is_omap_h3();
	193
	194	if (cpu_is_omap16xx())
	195	ocpi_enable();
	196
	197	#ifdef CONFIG_ARCH_OMAP_OTG
	198	if (need_transceiver) {
	199	ohci->transceiver = otg_get_transceiver();
	200	if (ohci->transceiver) {
	201	int status = otg_set_host(ohci->transceiver,
	202	&ohci_to_hcd(ohci)->self);
	203	dev_dbg(&pdev->dev, "init %s transceiver, status %d\n",
	204	ohci->transceiver->label, status);
	205	if (status) {
	206	if (ohci->transceiver)
	207	put_device(ohci->transceiver->dev);
	208	return status;
	209	}
	210	} else {
	211	dev_err(&pdev->dev, "can't find transceiver\n");
	212	return -ENODEV;
	213	}
	214	}
	215	#endif
	216
	217	omap_ohci_clock_power(1);
	218
	219	if (cpu_is_omap1510()) {
	220	omap_1510_local_bus_power(1);
	221	omap_1510_local_bus_init();
	222	}
	223
	224	if ((ret = ohci_init(ohci)) < 0)
	225	return ret;
	226
	227	/* board-specific power switching and overcurrent support */
	228	if (machine_is_omap_osk() \|\| machine_is_omap_innovator()) {
	229	u32 rh = roothub_a (ohci);
	230
	231	/* power switching (ganged by default) */
	232	rh &= ~RH_A_NPS;
	233
	234	/* TPS2045 switch for internal transceiver (port 1) */
	235	if (machine_is_omap_osk()) {
bc96c0ad	236	ohci_to_hcd(ohci)->power_budget = 250;
1da177e4 LT	237
	238	rh &= ~RH_A_NOCP;
	239
	240	/* gpio9 for overcurrent detction */
	241	omap_cfg_reg(W8_1610_GPIO9);
	242	omap_request_gpio(9);
	243	omap_set_gpio_direction(9, 1 /* IN */);
	244
	245	/* for paranoia's sake: disable USB.PUEN */
	246	omap_cfg_reg(W4_USB_HIGHZ);
	247	}
	248	ohci_writel(ohci, rh, &ohci->regs->roothub.a);
	249	distrust_firmware = 0;
	250	}
	251
	252	/* FIXME khubd hub requests should manage power switching */
	253	omap_ohci_transceiver_power(1);
	254
	255	/* board init will have already handled HMC and mux setup.
	256	* any external transceiver should already be initialized
	257	* too, so all configured ports use the right signaling now.
	258	*/
	259
	260	return 0;
	261	}
	262
	263	static void omap_stop_hc(struct platform_device *pdev)
	264	{
	265	dev_dbg(&pdev->dev, "stopping USB Controller\n");
	266	omap_ohci_clock_power(0);
	267	}
	268
	269
	270	/-------------------------------------------------------------------------/
	271
	272	void usb_hcd_omap_remove (struct usb_hcd , struct platform_device );
	273
	274	/* configure so an HC device and id are always provided */
	275	/* always called with process context; sleeping is OK */
	276
	277
	278	/**
	279	* usb_hcd_omap_probe - initialize OMAP-based HCDs
	280	* Context: !in_interrupt()
	281	*
	282	* Allocates basic resources for this USB host controller, and
	283	* then invokes the start() method for the HCD associated with it
	284	* through the hotplug entry's driver_data.
	285	*/
	286	int usb_hcd_omap_probe (const struct hc_driver *driver,
	287	struct platform_device *pdev)
	288	{
48944738	289	int retval, irq;
1da177e4 LT	290	struct usb_hcd *hcd = 0;
	291	struct ohci_hcd *ohci;
	292
	293	if (pdev->num_resources != 2) {
	294	printk(KERN_ERR "hcd probe: invalid num_resources: %i\n",
	295	pdev->num_resources);
	296	return -ENODEV;
	297	}
	298
	299	if (pdev->resource[0].flags != IORESOURCE_MEM
	300	\|\| pdev->resource[1].flags != IORESOURCE_IRQ) {
	301	printk(KERN_ERR "hcd probe: invalid resource type\n");
	302	return -ENODEV;
	303	}
	304
	305	usb_host_ck = clk_get(0, "usb_hhc_ck");
	306	if (IS_ERR(usb_host_ck))
	307	return PTR_ERR(usb_host_ck);
	308
	309	hcd = usb_create_hcd (driver, &pdev->dev, pdev->dev.bus_id);
	310	if (!hcd) {
	311	retval = -ENOMEM;
	312	goto err0;
	313	}
	314	hcd->rsrc_start = pdev->resource[0].start;
	315	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
	316
	317	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
	318	dev_dbg(&pdev->dev, "request_mem_region failed\n");
	319	retval = -EBUSY;
	320	goto err1;
	321	}
	322
	323	hcd->regs = (void __iomem *) (int) IO_ADDRESS(hcd->rsrc_start);
	324
	325	ohci = hcd_to_ohci(hcd);
	326	ohci_hcd_init(ohci);
	327
	328	retval = omap_start_hc(ohci, pdev);
	329	if (retval < 0)
	330	goto err2;
	331
48944738 DV	332	irq = platform_get_irq(pdev, 0);
	333	if (irq < 0) {
	334	retval = -ENXIO;
	335	goto err2;
	336	}
d54b5caa	337	retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
1da177e4 LT	338	if (retval == 0)
	339	return retval;
	340
	341	omap_stop_hc(pdev);
	342	err2:
	343	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	344	err1:
	345	usb_put_hcd(hcd);
	346	err0:
	347	clk_put(usb_host_ck);
	348	return retval;
	349	}
	350
	351
	352	/* may be called with controller, bus, and devices active */
	353
	354	/**
	355	* usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
	356	* @dev: USB Host Controller being removed
	357	* Context: !in_interrupt()
	358	*
	359	* Reverses the effect of usb_hcd_omap_probe(), first invoking
	360	* the HCD's stop() method. It is always called from a thread
	361	* context, normally "rmmod", "apmd", or something similar.
	362	*
	363	*/
	364	void usb_hcd_omap_remove (struct usb_hcd hcd, struct platform_device pdev)
	365	{
	366	usb_remove_hcd(hcd);
	367	if (machine_is_omap_osk())
	368	omap_free_gpio(9);
	369	omap_stop_hc(pdev);
	370	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	371	usb_put_hcd(hcd);
	372	clk_put(usb_host_ck);
	373	}
	374
	375	/-------------------------------------------------------------------------/
	376
	377	static int __devinit
	378	ohci_omap_start (struct usb_hcd *hcd)
	379	{
	380	struct omap_usb_config *config;
	381	struct ohci_hcd *ohci = hcd_to_ohci (hcd);
	382	int ret;
	383
	384	config = hcd->self.controller->platform_data;
d413984a DB	385	if (config->otg \|\| config->rwc) {
d413984a DB	386	ohci->hc_control = OHCI_CTRL_RWC;
1da177e4	387	writel(OHCI_CTRL_RWC, &ohci->regs->control);
d413984a	388	}
1da177e4 LT	389
	390	if ((ret = ohci_run (ohci)) < 0) {
	391	dev_err(hcd->self.controller, "can't start\n");
	392	ohci_stop (hcd);
	393	return ret;
	394	}
	395	return 0;
	396	}
	397
	398	/-------------------------------------------------------------------------/
	399
	400	static const struct hc_driver ohci_omap_hc_driver = {
	401	.description = hcd_name,
	402	.product_desc = "OMAP OHCI",
	403	.hcd_priv_size = sizeof(struct ohci_hcd),
	404
	405	/*
	406	* generic hardware linkage
	407	*/
	408	.irq = ohci_irq,
	409	.flags = HCD_USB11 \| HCD_MEMORY,
	410
	411	/*
	412	* basic lifecycle operations
	413	*/
	414	.start = ohci_omap_start,
	415	.stop = ohci_stop,
	416
	417	/*
	418	* managing i/o requests and associated device resources
	419	*/
	420	.urb_enqueue = ohci_urb_enqueue,
	421	.urb_dequeue = ohci_urb_dequeue,
	422	.endpoint_disable = ohci_endpoint_disable,
	423
	424	/*
	425	* scheduling support
	426	*/
	427	.get_frame_number = ohci_get_frame,
	428
	429	/*
	430	* root hub support
	431	*/
	432	.hub_status_data = ohci_hub_status_data,
	433	.hub_control = ohci_hub_control,
d413984a	434	.hub_irq_enable = ohci_rhsc_enable,
8ad7fe16	435	#ifdef CONFIG_PM
0c0382e3 AS	436	.bus_suspend = ohci_bus_suspend,
0c0382e3 AS	437	.bus_resume = ohci_bus_resume,
1da177e4 LT	438	#endif
	439	.start_port_reset = ohci_start_port_reset,
	440	};
	441
	442	/-------------------------------------------------------------------------/
	443
3ae5eaec	444	static int ohci_hcd_omap_drv_probe(struct platform_device *dev)
1da177e4	445	{
3ae5eaec	446	return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
1da177e4 LT	447	}
1da177e4 LT	448
3ae5eaec	449	static int ohci_hcd_omap_drv_remove(struct platform_device *dev)
1da177e4	450	{
3ae5eaec	451	struct usb_hcd *hcd = platform_get_drvdata(dev);
1da177e4 LT	452	struct ohci_hcd *ohci = hcd_to_ohci (hcd);
1da177e4 LT	453
3ae5eaec	454	usb_hcd_omap_remove(hcd, dev);
1da177e4 LT	455	if (ohci->transceiver) {
	456	(void) otg_set_host(ohci->transceiver, 0);
	457	put_device(ohci->transceiver->dev);
	458	}
3ae5eaec	459	platform_set_drvdata(dev, NULL);
1da177e4 LT	460
	461	return 0;
	462	}
	463
	464	/-------------------------------------------------------------------------/
	465
	466	#ifdef CONFIG_PM
	467
3ae5eaec	468	static int ohci_omap_suspend(struct platform_device *dev, pm_message_t message)
1da177e4	469	{
3ae5eaec	470	struct ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(dev));
f197b2c5 DB	471
	472	if (time_before(jiffies, ohci->next_statechange))
	473	msleep(5);
	474	ohci->next_statechange = jiffies;
	475
	476	omap_ohci_clock_power(0);
	477	ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
	478	dev->power.power_state = PMSG_SUSPEND;
	479	return 0;
1da177e4 LT	480	}
1da177e4 LT	481
3ae5eaec	482	static int ohci_omap_resume(struct platform_device *dev)
1da177e4	483	{
3ae5eaec	484	struct ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(dev));
1da177e4	485
b404a5b0	486	if (time_before(jiffies, ohci->next_statechange))
	487	msleep(5);
	488	ohci->next_statechange = jiffies;
f197b2c5	489
b404a5b0	490	omap_ohci_clock_power(1);
f197b2c5 DB	491	dev->power.power_state = PMSG_ON;
	492	usb_hcd_resume_root_hub(dev_get_drvdata(dev));
	493	return 0;
1da177e4 LT	494	}
	495
	496	#endif
	497
	498	/-------------------------------------------------------------------------/
	499
	500	/*
	501	* Driver definition to register with the OMAP bus
	502	*/
3ae5eaec	503	static struct platform_driver ohci_hcd_omap_driver = {
1da177e4 LT	504	.probe = ohci_hcd_omap_drv_probe,
	505	.remove = ohci_hcd_omap_drv_remove,
	506	#ifdef CONFIG_PM
	507	.suspend = ohci_omap_suspend,
	508	.resume = ohci_omap_resume,
	509	#endif
3ae5eaec RK	510	.driver = {
	511	.owner = THIS_MODULE,
	512	.name = "ohci",
	513	},
1da177e4 LT	514	};
	515
	516	static int __init ohci_hcd_omap_init (void)
	517	{
	518	printk (KERN_DEBUG "%s: " DRIVER_INFO " (OMAP)\n", hcd_name);
	519	if (usb_disabled())
	520	return -ENODEV;
	521
	522	pr_debug("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
	523	sizeof (struct ed), sizeof (struct td));
	524
3ae5eaec	525	return platform_driver_register(&ohci_hcd_omap_driver);
1da177e4 LT	526	}
	527
	528	static void __exit ohci_hcd_omap_cleanup (void)
	529	{
3ae5eaec	530	platform_driver_unregister(&ohci_hcd_omap_driver);
1da177e4 LT	531	}
	532
	533	module_init (ohci_hcd_omap_init);
	534	module_exit (ohci_hcd_omap_cleanup);