[deliverable/linux.git] / drivers / usb / host / ohci-pnx4008.c

/*
 * drivers/usb/host/ohci-pnx4008.c
 *
 * driver for Philips PNX4008 USB Host
 *
 * Authors: Dmitry Chigirev <source@mvista.com>
 *	    Vitaly Wool <vitalywool@gmail.com>
 *
 * register initialization is based on code examples provided by Philips
 * Copyright (c) 2005 Koninklijke Philips Electronics N.V.
 *
 * NOTE: This driver does not have suspend/resume functionality
 * This driver is intended for engineering development purposes only
 *
 * 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
 * the terms of the GNU General Public License version 2. This program
 * is licensed "as is" without any warranty of any kind, whether express
 * or implied.
 */
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>

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

#include <asm/arch/platform.h>
#include <asm/arch/irqs.h>
#include <asm/arch/gpio.h>

#define USB_CTRL	IO_ADDRESS(PNX4008_PWRMAN_BASE + 0x64)

/* USB_CTRL bit defines */
#define USB_SLAVE_HCLK_EN	(1 << 24)
#define USB_HOST_NEED_CLK_EN	(1 << 21)

#define USB_OTG_CLK_CTRL	IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0xFF4)
#define USB_OTG_CLK_STAT	IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0xFF8)

/* USB_OTG_CLK_CTRL bit defines */
#define AHB_M_CLOCK_ON		(1 << 4)
#define OTG_CLOCK_ON		(1 << 3)
#define I2C_CLOCK_ON		(1 << 2)
#define DEV_CLOCK_ON		(1 << 1)
#define HOST_CLOCK_ON		(1 << 0)

#define USB_OTG_STAT_CONTROL	IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0x110)

/* USB_OTG_STAT_CONTROL bit defines */
#define TRANSPARENT_I2C_EN	(1 << 7)
#define HOST_EN			(1 << 0)

/* ISP1301 USB transceiver I2C registers */
#define	ISP1301_MODE_CONTROL_1		0x04	/* u8 read, set, +1 clear */

#define	MC1_SPEED_REG		(1 << 0)
#define	MC1_SUSPEND_REG		(1 << 1)
#define	MC1_DAT_SE0		(1 << 2)
#define	MC1_TRANSPARENT		(1 << 3)
#define	MC1_BDIS_ACON_EN	(1 << 4)
#define	MC1_OE_INT_EN		(1 << 5)
#define	MC1_UART_EN		(1 << 6)
#define	MC1_MASK		0x7f

#define	ISP1301_MODE_CONTROL_2		0x12	/* u8 read, set, +1 clear */

#define	MC2_GLOBAL_PWR_DN	(1 << 0)
#define	MC2_SPD_SUSP_CTRL	(1 << 1)
#define	MC2_BI_DI		(1 << 2)
#define	MC2_TRANSP_BDIR0	(1 << 3)
#define	MC2_TRANSP_BDIR1	(1 << 4)
#define	MC2_AUDIO_EN		(1 << 5)
#define	MC2_PSW_EN		(1 << 6)
#define	MC2_EN2V7		(1 << 7)

#define	ISP1301_OTG_CONTROL_1		0x06	/* u8 read, set, +1 clear */
#	define	OTG1_DP_PULLUP		(1 << 0)
#	define	OTG1_DM_PULLUP		(1 << 1)
#	define	OTG1_DP_PULLDOWN	(1 << 2)
#	define	OTG1_DM_PULLDOWN	(1 << 3)
#	define	OTG1_ID_PULLDOWN	(1 << 4)
#	define	OTG1_VBUS_DRV		(1 << 5)
#	define	OTG1_VBUS_DISCHRG	(1 << 6)
#	define	OTG1_VBUS_CHRG		(1 << 7)
#define	ISP1301_OTG_STATUS		0x10	/* u8 readonly */
#	define	OTG_B_SESS_END		(1 << 6)
#	define	OTG_B_SESS_VLD		(1 << 7)

#define ISP1301_I2C_ADDR 0x2C

#define ISP1301_I2C_MODE_CONTROL_1 0x4
#define ISP1301_I2C_MODE_CONTROL_2 0x12
#define ISP1301_I2C_OTG_CONTROL_1 0x6
#define ISP1301_I2C_OTG_CONTROL_2 0x10
#define ISP1301_I2C_INTERRUPT_SOURCE 0x8
#define ISP1301_I2C_INTERRUPT_LATCH 0xA
#define ISP1301_I2C_INTERRUPT_FALLING 0xC
#define ISP1301_I2C_INTERRUPT_RISING 0xE
#define ISP1301_I2C_REG_CLEAR_ADDR 1

struct i2c_driver isp1301_driver;
struct i2c_client *isp1301_i2c_client;

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

static struct clk *usb_clk;

static int isp1301_probe(struct i2c_adapter *adap);
static int isp1301_detach(struct i2c_client *client);
static int isp1301_command(struct i2c_client *client, unsigned int cmd,
			   void *arg);

static const unsigned short normal_i2c[] =
    { ISP1301_I2C_ADDR, ISP1301_I2C_ADDR + 1, I2C_CLIENT_END };
static const unsigned short dummy_i2c_addrlist[] = { I2C_CLIENT_END };

static struct i2c_client_address_data addr_data = {
	.normal_i2c = normal_i2c,
	.probe = dummy_i2c_addrlist,
	.ignore = dummy_i2c_addrlist,
};

struct i2c_driver isp1301_driver = {
	.class = I2C_CLASS_HWMON,
	.attach_adapter = isp1301_probe,
	.detach_client = isp1301_detach,
	.command = isp1301_command
};

static int isp1301_attach(struct i2c_adapter *adap, int addr, int kind)
{
	struct i2c_client *c;

	c = kzalloc(sizeof(*c), GFP_KERNEL);

	if (!c)
		return -ENOMEM;

	strcpy(c->name, "isp1301");
	c->flags = 0;
	c->addr = addr;
	c->adapter = adap;
	c->driver = &isp1301_driver;

	isp1301_i2c_client = c;

	return i2c_attach_client(c);
}

static int isp1301_probe(struct i2c_adapter *adap)
{
	return i2c_probe(adap, &addr_data, isp1301_attach);
}

static int isp1301_detach(struct i2c_client *client)
{
	i2c_detach_client(client);
	kfree(isp1301_i2c_client);
	return 0;
}

/* No commands defined */
static int isp1301_command(struct i2c_client *client, unsigned int cmd,
			   void *arg)
{
	return 0;
}

static void i2c_write(u8 buf, u8 subaddr)
{
	char tmpbuf[2];

	tmpbuf[0] = subaddr;	/*register number */
	tmpbuf[1] = buf;	/*register data */
	i2c_master_send(isp1301_i2c_client, &tmpbuf[0], 2);
}

static void isp1301_configure(void)
{
	/* PNX4008 only supports DAT_SE0 USB mode */
	/* PNX4008 R2A requires setting the MAX603 to output 3.6V */
	/* Power up externel charge-pump */

	i2c_write(MC1_DAT_SE0 | MC1_SPEED_REG, ISP1301_I2C_MODE_CONTROL_1);
	i2c_write(~(MC1_DAT_SE0 | MC1_SPEED_REG),
		  ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR);
	i2c_write(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL,
		  ISP1301_I2C_MODE_CONTROL_2);
	i2c_write(~(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL),
		  ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR);
	i2c_write(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN,
		  ISP1301_I2C_OTG_CONTROL_1);
	i2c_write(~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN),
		  ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR);
	i2c_write(0xFF,
		  ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR);
	i2c_write(0xFF,
		  ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR);
	i2c_write(0xFF,
		  ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR);

}

static inline void isp1301_vbus_on(void)
{
	i2c_write(OTG1_VBUS_DRV, ISP1301_I2C_OTG_CONTROL_1);
}

static inline void isp1301_vbus_off(void)
{
	i2c_write(OTG1_VBUS_DRV,
		  ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR);
}

static void pnx4008_start_hc(void)
{
	unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) | HOST_EN;
	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
	isp1301_vbus_on();
}

static void pnx4008_stop_hc(void)
{
	unsigned long tmp;
	isp1301_vbus_off();
	tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN;
	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
}

static int __devinit ohci_pnx4008_start(struct usb_hcd *hcd)
{
	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	int ret;

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

	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_pnx4008_hc_driver = {
	.description = hcd_name,
	.product_desc =		"pnx4008 OHCI",

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

	.hcd_priv_size =	sizeof(struct ohci_hcd),
	/*
	 * basic lifecycle operations
	 */
	.start = ohci_pnx4008_start,
	.stop = ohci_stop,
	.shutdown = ohci_shutdown,

	/*
	 * managing i/o requests and associated device resources
	 */
	.urb_enqueue = ohci_urb_enqueue,
	.urb_dequeue = ohci_urb_dequeue,
	.endpoint_disable = ohci_endpoint_disable,

	/*
	 * scheduling support
	 */
	.get_frame_number = ohci_get_frame,

	/*
	 * root hub support
	 */
	.hub_status_data = ohci_hub_status_data,
	.hub_control = ohci_hub_control,
#ifdef	CONFIG_PM
	.bus_suspend = ohci_bus_suspend,
	.bus_resume = ohci_bus_resume,
#endif
	.start_port_reset = ohci_start_port_reset,
};

#define USB_CLOCK_MASK (AHB_M_CLOCK_ON| OTG_CLOCK_ON | HOST_CLOCK_ON | I2C_CLOCK_ON)

static void pnx4008_set_usb_bits(void)
{
	start_int_set_falling_edge(SE_USB_OTG_ATX_INT_N);
	start_int_ack(SE_USB_OTG_ATX_INT_N);
	start_int_umask(SE_USB_OTG_ATX_INT_N);

	start_int_set_rising_edge(SE_USB_OTG_TIMER_INT);
	start_int_ack(SE_USB_OTG_TIMER_INT);
	start_int_umask(SE_USB_OTG_TIMER_INT);

	start_int_set_rising_edge(SE_USB_I2C_INT);
	start_int_ack(SE_USB_I2C_INT);
	start_int_umask(SE_USB_I2C_INT);

	start_int_set_rising_edge(SE_USB_INT);
	start_int_ack(SE_USB_INT);
	start_int_umask(SE_USB_INT);

	start_int_set_rising_edge(SE_USB_NEED_CLK_INT);
	start_int_ack(SE_USB_NEED_CLK_INT);
	start_int_umask(SE_USB_NEED_CLK_INT);

	start_int_set_rising_edge(SE_USB_AHB_NEED_CLK_INT);
	start_int_ack(SE_USB_AHB_NEED_CLK_INT);
	start_int_umask(SE_USB_AHB_NEED_CLK_INT);
}

static void pnx4008_unset_usb_bits(void)
{
	start_int_mask(SE_USB_OTG_ATX_INT_N);
	start_int_mask(SE_USB_OTG_TIMER_INT);
	start_int_mask(SE_USB_I2C_INT);
	start_int_mask(SE_USB_INT);
	start_int_mask(SE_USB_NEED_CLK_INT);
	start_int_mask(SE_USB_AHB_NEED_CLK_INT);
}

static int __devinit usb_hcd_pnx4008_probe(struct platform_device *pdev)
{
	struct usb_hcd *hcd = 0;
	struct ohci_hcd *ohci;
	const struct hc_driver *driver = &ohci_pnx4008_hc_driver;

	int ret = 0, irq;

	dev_dbg(&pdev->dev, "%s: " DRIVER_INFO " (pnx4008)\n", hcd_name);
	if (usb_disabled()) {
		err("USB is disabled");
		ret = -ENODEV;
		goto out;
	}

	if (pdev->num_resources != 2
	    || pdev->resource[0].flags != IORESOURCE_MEM
	    || pdev->resource[1].flags != IORESOURCE_IRQ) {
		err("Invalid resource configuration");
		ret = -ENODEV;
		goto out;
	}

	/* Enable AHB slave USB clock, needed for further USB clock control */
	__raw_writel(USB_SLAVE_HCLK_EN | (1 << 19), USB_CTRL);

	ret = i2c_add_driver(&isp1301_driver);
	if (ret < 0) {
		err("failed to connect I2C to ISP1301 USB Transceiver");
		goto out;
	}

	isp1301_configure();

	/* Enable USB PLL */
	usb_clk = clk_get(&pdev->dev, "ck_pll5");
	if (IS_ERR(usb_clk)) {
		err("failed to acquire USB PLL");
		ret = PTR_ERR(usb_clk);
		goto out1;
	}

	ret = clk_enable(usb_clk);
	if (ret < 0) {
		err("failed to start USB PLL");
		goto out2;
	}

	ret = clk_set_rate(usb_clk, 48000);
	if (ret < 0) {
		err("failed to set USB clock rate");
		goto out3;
	}

	__raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL);

	/* Set to enable all needed USB clocks */
	__raw_writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL);

	while ((__raw_readl(USB_OTG_CLK_STAT) & USB_CLOCK_MASK) !=
	       USB_CLOCK_MASK) ;

	hcd = usb_create_hcd (driver, &pdev->dev, pdev->dev.bus_id);
	if (!hcd) {
		err("Failed to allocate HC buffer");
		ret = -ENOMEM;
		goto out3;
	}

	/* Set all USB bits in the Start Enable register */
	pnx4008_set_usb_bits();

	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");
		ret =  -ENOMEM;
		goto out4;
	}
	hcd->regs = (void __iomem *)pdev->resource[0].start;

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		ret = -ENXIO;
		goto out4;
	}

	pnx4008_start_hc();
	platform_set_drvdata(pdev, hcd);
	ohci = hcd_to_ohci(hcd);
	ohci_hcd_init(ohci);

	dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
	ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
	if (ret == 0)
		return ret;

	pnx4008_stop_hc();
out4:
	pnx4008_unset_usb_bits();
	usb_put_hcd(hcd);
out3:
	clk_disable(usb_clk);
out2:
	clk_put(usb_clk);
out1:
	i2c_del_driver(&isp1301_driver);
out:
	return ret;
}

static int usb_hcd_pnx4008_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	usb_remove_hcd(hcd);
	pnx4008_stop_hc();
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
	pnx4008_unset_usb_bits();
	clk_disable(usb_clk);
	clk_put(usb_clk);
	i2c_del_driver(&isp1301_driver);

	platform_set_drvdata(pdev, NULL);

	return 0;
}

/* work with hotplug and coldplug */
MODULE_ALIAS("platform:usb-ohci");

static struct platform_driver usb_hcd_pnx4008_driver = {
	.driver = {
		.name = "usb-ohci",
		.owner	= THIS_MODULE,
	},
	.probe = usb_hcd_pnx4008_probe,
	.remove = usb_hcd_pnx4008_remove,
};
Commit	Line	Data
60bbfc84 VW	1	/*
	2	* drivers/usb/host/ohci-pnx4008.c
	3	*
	4	* driver for Philips PNX4008 USB Host
	5	*
	6	* Authors: Dmitry Chigirev <source@mvista.com>
dd9048af	7	* Vitaly Wool <vitalywool@gmail.com>
60bbfc84 VW	8	*
	9	* register initialization is based on code examples provided by Philips
	10	* Copyright (c) 2005 Koninklijke Philips Electronics N.V.
	11	*
	12	* NOTE: This driver does not have suspend/resume functionality
	13	* This driver is intended for engineering development purposes only
	14	*
	15	* 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
	16	* the terms of the GNU General Public License version 2. This program
	17	* is licensed "as is" without any warranty of any kind, whether express
	18	* or implied.
	19	*/
	20	#include <linux/clk.h>
	21	#include <linux/platform_device.h>
	22	#include <linux/i2c.h>
	23
	24	#include <asm/hardware.h>
	25	#include <asm/io.h>
	26	#include <asm/mach-types.h>
	27
	28	#include <asm/arch/platform.h>
	29	#include <asm/arch/irqs.h>
	30	#include <asm/arch/gpio.h>
	31
dd9048af	32	#define USB_CTRL IO_ADDRESS(PNX4008_PWRMAN_BASE + 0x64)
60bbfc84 VW	33
	34	/* USB_CTRL bit defines */
	35	#define USB_SLAVE_HCLK_EN (1 << 24)
	36	#define USB_HOST_NEED_CLK_EN (1 << 21)
	37
	38	#define USB_OTG_CLK_CTRL IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0xFF4)
	39	#define USB_OTG_CLK_STAT IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0xFF8)
	40
	41	/* USB_OTG_CLK_CTRL bit defines */
	42	#define AHB_M_CLOCK_ON (1 << 4)
	43	#define OTG_CLOCK_ON (1 << 3)
	44	#define I2C_CLOCK_ON (1 << 2)
	45	#define DEV_CLOCK_ON (1 << 1)
	46	#define HOST_CLOCK_ON (1 << 0)
	47
	48	#define USB_OTG_STAT_CONTROL IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0x110)
	49
	50	/* USB_OTG_STAT_CONTROL bit defines */
	51	#define TRANSPARENT_I2C_EN (1 << 7)
	52	#define HOST_EN (1 << 0)
	53
	54	/* ISP1301 USB transceiver I2C registers */
	55	#define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */
	56
	57	#define MC1_SPEED_REG (1 << 0)
	58	#define MC1_SUSPEND_REG (1 << 1)
	59	#define MC1_DAT_SE0 (1 << 2)
	60	#define MC1_TRANSPARENT (1 << 3)
	61	#define MC1_BDIS_ACON_EN (1 << 4)
	62	#define MC1_OE_INT_EN (1 << 5)
	63	#define MC1_UART_EN (1 << 6)
	64	#define MC1_MASK 0x7f
	65
	66	#define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */
	67
	68	#define MC2_GLOBAL_PWR_DN (1 << 0)
	69	#define MC2_SPD_SUSP_CTRL (1 << 1)
	70	#define MC2_BI_DI (1 << 2)
	71	#define MC2_TRANSP_BDIR0 (1 << 3)
	72	#define MC2_TRANSP_BDIR1 (1 << 4)
	73	#define MC2_AUDIO_EN (1 << 5)
	74	#define MC2_PSW_EN (1 << 6)
	75	#define MC2_EN2V7 (1 << 7)
	76
	77	#define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */
	78	# define OTG1_DP_PULLUP (1 << 0)
	79	# define OTG1_DM_PULLUP (1 << 1)
	80	# define OTG1_DP_PULLDOWN (1 << 2)
	81	# define OTG1_DM_PULLDOWN (1 << 3)
	82	# define OTG1_ID_PULLDOWN (1 << 4)
	83	# define OTG1_VBUS_DRV (1 << 5)
	84	# define OTG1_VBUS_DISCHRG (1 << 6)
	85	# define OTG1_VBUS_CHRG (1 << 7)
	86	#define ISP1301_OTG_STATUS 0x10 /* u8 readonly */
	87	# define OTG_B_SESS_END (1 << 6)
	88	# define OTG_B_SESS_VLD (1 << 7)
	89
	90	#define ISP1301_I2C_ADDR 0x2C
	91
	92	#define ISP1301_I2C_MODE_CONTROL_1 0x4
	93	#define ISP1301_I2C_MODE_CONTROL_2 0x12
	94	#define ISP1301_I2C_OTG_CONTROL_1 0x6
	95	#define ISP1301_I2C_OTG_CONTROL_2 0x10
	96	#define ISP1301_I2C_INTERRUPT_SOURCE 0x8
97	#define ISP1301_I2C_INTERRUPT_LATCH 0xA
98	#define ISP1301_I2C_INTERRUPT_FALLING 0xC
99	#define ISP1301_I2C_INTERRUPT_RISING 0xE
100	#define ISP1301_I2C_REG_CLEAR_ADDR 1
101
102	struct i2c_driver isp1301_driver;
103	struct i2c_client *isp1301_i2c_client;
104
105	extern int usb_disabled(void);
106	extern int ocpi_enable(void);
107
108	static struct clk *usb_clk;
109
110	static int isp1301_probe(struct i2c_adapter *adap);
111	static int isp1301_detach(struct i2c_client *client);
112	static int isp1301_command(struct i2c_client *client, unsigned int cmd,
113	void *arg);
114
2cdddeb8	115	static const unsigned short normal_i2c[] =
60bbfc84	116	{ ISP1301_I2C_ADDR, ISP1301_I2C_ADDR + 1, I2C_CLIENT_END };
2cdddeb8	117	static const unsigned short dummy_i2c_addrlist[] = { I2C_CLIENT_END };
60bbfc84 VW	118
	119	static struct i2c_client_address_data addr_data = {
	120	.normal_i2c = normal_i2c,
	121	.probe = dummy_i2c_addrlist,
	122	.ignore = dummy_i2c_addrlist,
	123	};
	124
	125	struct i2c_driver isp1301_driver = {
60bbfc84 VW	126	.class = I2C_CLASS_HWMON,
	127	.attach_adapter = isp1301_probe,
	128	.detach_client = isp1301_detach,
	129	.command = isp1301_command
	130	};
	131
	132	static int isp1301_attach(struct i2c_adapter *adap, int addr, int kind)
	133	{
	134	struct i2c_client *c;
	135
13f9966b	136	c = kzalloc(sizeof(*c), GFP_KERNEL);
60bbfc84 VW	137
	138	if (!c)
	139	return -ENOMEM;
	140
	141	strcpy(c->name, "isp1301");
	142	c->flags = 0;
	143	c->addr = addr;
	144	c->adapter = adap;
	145	c->driver = &isp1301_driver;
	146
	147	isp1301_i2c_client = c;
	148
	149	return i2c_attach_client(c);
	150	}
	151
	152	static int isp1301_probe(struct i2c_adapter *adap)
	153	{
	154	return i2c_probe(adap, &addr_data, isp1301_attach);
	155	}
	156
	157	static int isp1301_detach(struct i2c_client *client)
	158	{
	159	i2c_detach_client(client);
	160	kfree(isp1301_i2c_client);
	161	return 0;
	162	}
	163
	164	/* No commands defined */
	165	static int isp1301_command(struct i2c_client *client, unsigned int cmd,
	166	void *arg)
	167	{
	168	return 0;
	169	}
	170
	171	static void i2c_write(u8 buf, u8 subaddr)
	172	{
	173	char tmpbuf[2];
	174
	175	tmpbuf[0] = subaddr; /register number /
	176	tmpbuf[1] = buf; /register data /
	177	i2c_master_send(isp1301_i2c_client, &tmpbuf[0], 2);
	178	}
	179
	180	static void isp1301_configure(void)
	181	{
	182	/* PNX4008 only supports DAT_SE0 USB mode */
	183	/* PNX4008 R2A requires setting the MAX603 to output 3.6V */
	184	/* Power up externel charge-pump */
	185
	186	i2c_write(MC1_DAT_SE0 \| MC1_SPEED_REG, ISP1301_I2C_MODE_CONTROL_1);
	187	i2c_write(~(MC1_DAT_SE0 \| MC1_SPEED_REG),
	188	ISP1301_I2C_MODE_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR);
	189	i2c_write(MC2_BI_DI \| MC2_PSW_EN \| MC2_SPD_SUSP_CTRL,
	190	ISP1301_I2C_MODE_CONTROL_2);
	191	i2c_write(~(MC2_BI_DI \| MC2_PSW_EN \| MC2_SPD_SUSP_CTRL),
	192	ISP1301_I2C_MODE_CONTROL_2 \| ISP1301_I2C_REG_CLEAR_ADDR);
	193	i2c_write(OTG1_DM_PULLDOWN \| OTG1_DP_PULLDOWN,
	194	ISP1301_I2C_OTG_CONTROL_1);
	195	i2c_write(~(OTG1_DM_PULLDOWN \| OTG1_DP_PULLDOWN),
	196	ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR);
	197	i2c_write(0xFF,
	198	ISP1301_I2C_INTERRUPT_LATCH \| ISP1301_I2C_REG_CLEAR_ADDR);
	199	i2c_write(0xFF,
	200	ISP1301_I2C_INTERRUPT_FALLING \| ISP1301_I2C_REG_CLEAR_ADDR);
201	i2c_write(0xFF,
202	ISP1301_I2C_INTERRUPT_RISING \| ISP1301_I2C_REG_CLEAR_ADDR);
203
204	}
205
206	static inline void isp1301_vbus_on(void)
207	{
208	i2c_write(OTG1_VBUS_DRV, ISP1301_I2C_OTG_CONTROL_1);
209	}
210
211	static inline void isp1301_vbus_off(void)
212	{
213	i2c_write(OTG1_VBUS_DRV,
214	ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR);
215	}
216
217	static void pnx4008_start_hc(void)
218	{
219	unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) \| HOST_EN;
220	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
221	isp1301_vbus_on();
222	}
223
224	static void pnx4008_stop_hc(void)
225	{
226	unsigned long tmp;
227	isp1301_vbus_off();
228	tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN;
229	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
230	}
231
232	static int __devinit ohci_pnx4008_start(struct usb_hcd *hcd)
233	{
234	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
235	int ret;
236
237	if ((ret = ohci_init(ohci)) < 0)
238	return ret;
239
240	if ((ret = ohci_run(ohci)) < 0) {
241	dev_err(hcd->self.controller, "can't start\n");
242	ohci_stop(hcd);
243	return ret;
244	}
245	return 0;
246	}
247
248	static const struct hc_driver ohci_pnx4008_hc_driver = {
249	.description = hcd_name,
250	.product_desc = "pnx4008 OHCI",
251
252	/*
253	* generic hardware linkage
254	*/
255	.irq = ohci_irq,
256	.flags = HCD_USB11 \| HCD_MEMORY,
257
258	.hcd_priv_size = sizeof(struct ohci_hcd),
259	/*
260	* basic lifecycle operations
261	*/
262	.start = ohci_pnx4008_start,
263	.stop = ohci_stop,
8442ae00	264	.shutdown = ohci_shutdown,
60bbfc84 VW	265
	266	/*
	267	* managing i/o requests and associated device resources
	268	*/
	269	.urb_enqueue = ohci_urb_enqueue,
	270	.urb_dequeue = ohci_urb_dequeue,
	271	.endpoint_disable = ohci_endpoint_disable,
	272
	273	/*
	274	* scheduling support
	275	*/
	276	.get_frame_number = ohci_get_frame,
	277
	278	/*
	279	* root hub support
	280	*/
	281	.hub_status_data = ohci_hub_status_data,
	282	.hub_control = ohci_hub_control,
8442ae00 DB	283	#ifdef CONFIG_PM
	284	.bus_suspend = ohci_bus_suspend,
	285	.bus_resume = ohci_bus_resume,
	286	#endif
60bbfc84 VW	287	.start_port_reset = ohci_start_port_reset,
	288	};
	289
	290	#define USB_CLOCK_MASK (AHB_M_CLOCK_ON\| OTG_CLOCK_ON \| HOST_CLOCK_ON \| I2C_CLOCK_ON)
	291
	292	static void pnx4008_set_usb_bits(void)
	293	{
	294	start_int_set_falling_edge(SE_USB_OTG_ATX_INT_N);
	295	start_int_ack(SE_USB_OTG_ATX_INT_N);
	296	start_int_umask(SE_USB_OTG_ATX_INT_N);
	297
	298	start_int_set_rising_edge(SE_USB_OTG_TIMER_INT);
	299	start_int_ack(SE_USB_OTG_TIMER_INT);
	300	start_int_umask(SE_USB_OTG_TIMER_INT);
	301
	302	start_int_set_rising_edge(SE_USB_I2C_INT);
	303	start_int_ack(SE_USB_I2C_INT);
	304	start_int_umask(SE_USB_I2C_INT);
	305
	306	start_int_set_rising_edge(SE_USB_INT);
	307	start_int_ack(SE_USB_INT);
	308	start_int_umask(SE_USB_INT);
	309
	310	start_int_set_rising_edge(SE_USB_NEED_CLK_INT);
	311	start_int_ack(SE_USB_NEED_CLK_INT);
	312	start_int_umask(SE_USB_NEED_CLK_INT);
	313
	314	start_int_set_rising_edge(SE_USB_AHB_NEED_CLK_INT);
	315	start_int_ack(SE_USB_AHB_NEED_CLK_INT);
	316	start_int_umask(SE_USB_AHB_NEED_CLK_INT);
	317	}
	318
	319	static void pnx4008_unset_usb_bits(void)
	320	{
	321	start_int_mask(SE_USB_OTG_ATX_INT_N);
	322	start_int_mask(SE_USB_OTG_TIMER_INT);
	323	start_int_mask(SE_USB_I2C_INT);
	324	start_int_mask(SE_USB_INT);
	325	start_int_mask(SE_USB_NEED_CLK_INT);
	326	start_int_mask(SE_USB_AHB_NEED_CLK_INT);
	327	}
	328
	329	static int __devinit usb_hcd_pnx4008_probe(struct platform_device *pdev)
	330	{
	331	struct usb_hcd *hcd = 0;
	332	struct ohci_hcd *ohci;
	333	const struct hc_driver *driver = &ohci_pnx4008_hc_driver;
	334
	335	int ret = 0, irq;
	336
	337	dev_dbg(&pdev->dev, "%s: " DRIVER_INFO " (pnx4008)\n", hcd_name);
	338	if (usb_disabled()) {
	339	err("USB is disabled");
	340	ret = -ENODEV;
	341	goto out;
	342	}
	343
	344	if (pdev->num_resources != 2
	345	\|\| pdev->resource[0].flags != IORESOURCE_MEM
	346	\|\| pdev->resource[1].flags != IORESOURCE_IRQ) {
	347	err("Invalid resource configuration");
	348	ret = -ENODEV;
	349	goto out;
	350	}
351
352	/* Enable AHB slave USB clock, needed for further USB clock control */
353	__raw_writel(USB_SLAVE_HCLK_EN \| (1 << 19), USB_CTRL);
354
355	ret = i2c_add_driver(&isp1301_driver);
356	if (ret < 0) {
357	err("failed to connect I2C to ISP1301 USB Transceiver");
358	goto out;
359	}
360
361	isp1301_configure();
362
363	/* Enable USB PLL */
364	usb_clk = clk_get(&pdev->dev, "ck_pll5");
365	if (IS_ERR(usb_clk)) {
366	err("failed to acquire USB PLL");
367	ret = PTR_ERR(usb_clk);
368	goto out1;
369	}
370
371	ret = clk_enable(usb_clk);
372	if (ret < 0) {
373	err("failed to start USB PLL");
374	goto out2;
375	}
376
377	ret = clk_set_rate(usb_clk, 48000);
378	if (ret < 0) {
379	err("failed to set USB clock rate");
380	goto out3;
381	}
382
383	__raw_writel(__raw_readl(USB_CTRL) \| USB_HOST_NEED_CLK_EN, USB_CTRL);
384
385	/* Set to enable all needed USB clocks */
386	__raw_writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL);
387
388	while ((__raw_readl(USB_OTG_CLK_STAT) & USB_CLOCK_MASK) !=
389	USB_CLOCK_MASK) ;
390
391	hcd = usb_create_hcd (driver, &pdev->dev, pdev->dev.bus_id);
392	if (!hcd) {
393	err("Failed to allocate HC buffer");
394	ret = -ENOMEM;
395	goto out3;
396	}
397
398	/* Set all USB bits in the Start Enable register */
399	pnx4008_set_usb_bits();
400
401	hcd->rsrc_start = pdev->resource[0].start;
402	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
403	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
404	dev_dbg(&pdev->dev, "request_mem_region failed\n");
405	ret = -ENOMEM;
406	goto out4;
407	}
408	hcd->regs = (void __iomem *)pdev->resource[0].start;
409
410	irq = platform_get_irq(pdev, 0);
411	if (irq < 0) {
412	ret = -ENXIO;
413	goto out4;
414	}
415
60bbfc84 VW	416	pnx4008_start_hc();
	417	platform_set_drvdata(pdev, hcd);
	418	ohci = hcd_to_ohci(hcd);
	419	ohci_hcd_init(ohci);
	420
	421	dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
38515e90	422	ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
60bbfc84 VW	423	if (ret == 0)
	424	return ret;
	425
	426	pnx4008_stop_hc();
	427	out4:
	428	pnx4008_unset_usb_bits();
	429	usb_put_hcd(hcd);
	430	out3:
	431	clk_disable(usb_clk);
	432	out2:
	433	clk_put(usb_clk);
	434	out1:
	435	i2c_del_driver(&isp1301_driver);
	436	out:
	437	return ret;
	438	}
	439
	440	static int usb_hcd_pnx4008_remove(struct platform_device *pdev)
	441	{
	442	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	443
	444	usb_remove_hcd(hcd);
	445	pnx4008_stop_hc();
	446	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	447	usb_put_hcd(hcd);
	448	pnx4008_unset_usb_bits();
	449	clk_disable(usb_clk);
	450	clk_put(usb_clk);
	451	i2c_del_driver(&isp1301_driver);
	452
	453	platform_set_drvdata(pdev, NULL);
	454
	455	return 0;
	456	}
	457
f4fce61d KS	458	/* work with hotplug and coldplug */
	459	MODULE_ALIAS("platform:usb-ohci");
	460
60bbfc84 VW	461	static struct platform_driver usb_hcd_pnx4008_driver = {
	462	.driver = {
	463	.name = "usb-ohci",
f4fce61d	464	.owner = THIS_MODULE,
60bbfc84 VW	465	},
	466	.probe = usb_hcd_pnx4008_probe,
	467	.remove = usb_hcd_pnx4008_remove,
	468	};
	469