[mirror_ubuntu-jammy-kernel.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 <mach/hardware.h>
#include <asm/io.h>

#include <mach/platform.h>
#include <mach/irqs.h>
#include <mach/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 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 = {
	.driver = {
		.name = "isp1301_pnx",
	},
	.attach_adapter = isp1301_probe,
	.detach_client = isp1301_detach,
};

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

	c = kzalloc(sizeof(*c), GFP_KERNEL);
	if (!c)
		return -ENOMEM;

	strlcpy(c->name, "isp1301_pnx", I2C_NAME_SIZE);
	c->flags = 0;
	c->addr = addr;
	c->adapter = adap;
	c->driver = &isp1301_driver;

	err = i2c_attach_client(c);
	if (err) {
		kfree(c);
		return err;
	}

	isp1301_i2c_client = c;

	return 0;
}

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;
}

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,
	.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,
};

#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, dev_name(&pdev->dev));
	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
a09e64fb	24	#include <mach/hardware.h>
60bbfc84	25	#include <asm/io.h>
60bbfc84	26
a09e64fb RK	27	#include <mach/platform.h>
	28	#include <mach/irqs.h>
	29	#include <mach/gpio.h>
60bbfc84	30
dd9048af	31	#define USB_CTRL IO_ADDRESS(PNX4008_PWRMAN_BASE + 0x64)
60bbfc84 VW	32
	33	/* USB_CTRL bit defines */
	34	#define USB_SLAVE_HCLK_EN (1 << 24)
	35	#define USB_HOST_NEED_CLK_EN (1 << 21)
	36
	37	#define USB_OTG_CLK_CTRL IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0xFF4)
	38	#define USB_OTG_CLK_STAT IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0xFF8)
	39
	40	/* USB_OTG_CLK_CTRL bit defines */
	41	#define AHB_M_CLOCK_ON (1 << 4)
	42	#define OTG_CLOCK_ON (1 << 3)
	43	#define I2C_CLOCK_ON (1 << 2)
	44	#define DEV_CLOCK_ON (1 << 1)
	45	#define HOST_CLOCK_ON (1 << 0)
	46
	47	#define USB_OTG_STAT_CONTROL IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0x110)
	48
	49	/* USB_OTG_STAT_CONTROL bit defines */
	50	#define TRANSPARENT_I2C_EN (1 << 7)
	51	#define HOST_EN (1 << 0)
	52
	53	/* ISP1301 USB transceiver I2C registers */
	54	#define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */
	55
	56	#define MC1_SPEED_REG (1 << 0)
	57	#define MC1_SUSPEND_REG (1 << 1)
	58	#define MC1_DAT_SE0 (1 << 2)
	59	#define MC1_TRANSPARENT (1 << 3)
	60	#define MC1_BDIS_ACON_EN (1 << 4)
	61	#define MC1_OE_INT_EN (1 << 5)
	62	#define MC1_UART_EN (1 << 6)
	63	#define MC1_MASK 0x7f
	64
	65	#define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */
	66
	67	#define MC2_GLOBAL_PWR_DN (1 << 0)
	68	#define MC2_SPD_SUSP_CTRL (1 << 1)
	69	#define MC2_BI_DI (1 << 2)
	70	#define MC2_TRANSP_BDIR0 (1 << 3)
	71	#define MC2_TRANSP_BDIR1 (1 << 4)
	72	#define MC2_AUDIO_EN (1 << 5)
	73	#define MC2_PSW_EN (1 << 6)
	74	#define MC2_EN2V7 (1 << 7)
	75
	76	#define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */
	77	# define OTG1_DP_PULLUP (1 << 0)
	78	# define OTG1_DM_PULLUP (1 << 1)
	79	# define OTG1_DP_PULLDOWN (1 << 2)
	80	# define OTG1_DM_PULLDOWN (1 << 3)
	81	# define OTG1_ID_PULLDOWN (1 << 4)
	82	# define OTG1_VBUS_DRV (1 << 5)
	83	# define OTG1_VBUS_DISCHRG (1 << 6)
	84	# define OTG1_VBUS_CHRG (1 << 7)
	85	#define ISP1301_OTG_STATUS 0x10 /* u8 readonly */
	86	# define OTG_B_SESS_END (1 << 6)
	87	# define OTG_B_SESS_VLD (1 << 7)
	88
	89	#define ISP1301_I2C_ADDR 0x2C
	90
	91	#define ISP1301_I2C_MODE_CONTROL_1 0x4
	92	#define ISP1301_I2C_MODE_CONTROL_2 0x12
	93	#define ISP1301_I2C_OTG_CONTROL_1 0x6
	94	#define ISP1301_I2C_OTG_CONTROL_2 0x10
	95	#define ISP1301_I2C_INTERRUPT_SOURCE 0x8
96	#define ISP1301_I2C_INTERRUPT_LATCH 0xA
97	#define ISP1301_I2C_INTERRUPT_FALLING 0xC
98	#define ISP1301_I2C_INTERRUPT_RISING 0xE
99	#define ISP1301_I2C_REG_CLEAR_ADDR 1
100
101	struct i2c_driver isp1301_driver;
102	struct i2c_client *isp1301_i2c_client;
103
104	extern int usb_disabled(void);
105	extern int ocpi_enable(void);
106
107	static struct clk *usb_clk;
108
109	static int isp1301_probe(struct i2c_adapter *adap);
110	static int isp1301_detach(struct i2c_client *client);
60bbfc84	111
2cdddeb8	112	static const unsigned short normal_i2c[] =
60bbfc84	113	{ ISP1301_I2C_ADDR, ISP1301_I2C_ADDR + 1, I2C_CLIENT_END };
2cdddeb8	114	static const unsigned short dummy_i2c_addrlist[] = { I2C_CLIENT_END };
60bbfc84 VW	115
	116	static struct i2c_client_address_data addr_data = {
	117	.normal_i2c = normal_i2c,
	118	.probe = dummy_i2c_addrlist,
	119	.ignore = dummy_i2c_addrlist,
	120	};
	121
	122	struct i2c_driver isp1301_driver = {
64b3d6d1 JD	123	.driver = {
	124	.name = "isp1301_pnx",
	125	},
60bbfc84 VW	126	.attach_adapter = isp1301_probe,
60bbfc84 VW	127	.detach_client = isp1301_detach,
60bbfc84 VW	128	};
	129
	130	static int isp1301_attach(struct i2c_adapter *adap, int addr, int kind)
	131	{
	132	struct i2c_client *c;
64b3d6d1	133	int err;
60bbfc84	134
13f9966b	135	c = kzalloc(sizeof(*c), GFP_KERNEL);
60bbfc84 VW	136	if (!c)
	137	return -ENOMEM;
	138
64b3d6d1	139	strlcpy(c->name, "isp1301_pnx", I2C_NAME_SIZE);
60bbfc84 VW	140	c->flags = 0;
	141	c->addr = addr;
	142	c->adapter = adap;
	143	c->driver = &isp1301_driver;
	144
64b3d6d1 JD	145	err = i2c_attach_client(c);
	146	if (err) {
	147	kfree(c);
	148	return err;
	149	}
	150
60bbfc84 VW	151	isp1301_i2c_client = c;
60bbfc84 VW	152
64b3d6d1	153	return 0;
60bbfc84 VW	154	}
	155
	156	static int isp1301_probe(struct i2c_adapter *adap)
	157	{
	158	return i2c_probe(adap, &addr_data, isp1301_attach);
	159	}
	160
	161	static int isp1301_detach(struct i2c_client *client)
	162	{
	163	i2c_detach_client(client);
	164	kfree(isp1301_i2c_client);
	165	return 0;
	166	}
	167
60bbfc84 VW	168	static void i2c_write(u8 buf, u8 subaddr)
	169	{
	170	char tmpbuf[2];
	171
	172	tmpbuf[0] = subaddr; /register number /
	173	tmpbuf[1] = buf; /register data /
	174	i2c_master_send(isp1301_i2c_client, &tmpbuf[0], 2);
	175	}
	176
	177	static void isp1301_configure(void)
	178	{
	179	/* PNX4008 only supports DAT_SE0 USB mode */
	180	/* PNX4008 R2A requires setting the MAX603 to output 3.6V */
	181	/* Power up externel charge-pump */
	182
	183	i2c_write(MC1_DAT_SE0 \| MC1_SPEED_REG, ISP1301_I2C_MODE_CONTROL_1);
	184	i2c_write(~(MC1_DAT_SE0 \| MC1_SPEED_REG),
	185	ISP1301_I2C_MODE_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR);
	186	i2c_write(MC2_BI_DI \| MC2_PSW_EN \| MC2_SPD_SUSP_CTRL,
	187	ISP1301_I2C_MODE_CONTROL_2);
	188	i2c_write(~(MC2_BI_DI \| MC2_PSW_EN \| MC2_SPD_SUSP_CTRL),
	189	ISP1301_I2C_MODE_CONTROL_2 \| ISP1301_I2C_REG_CLEAR_ADDR);
	190	i2c_write(OTG1_DM_PULLDOWN \| OTG1_DP_PULLDOWN,
	191	ISP1301_I2C_OTG_CONTROL_1);
	192	i2c_write(~(OTG1_DM_PULLDOWN \| OTG1_DP_PULLDOWN),
	193	ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR);
	194	i2c_write(0xFF,
	195	ISP1301_I2C_INTERRUPT_LATCH \| ISP1301_I2C_REG_CLEAR_ADDR);
	196	i2c_write(0xFF,
	197	ISP1301_I2C_INTERRUPT_FALLING \| ISP1301_I2C_REG_CLEAR_ADDR);
	198	i2c_write(0xFF,
	199	ISP1301_I2C_INTERRUPT_RISING \| ISP1301_I2C_REG_CLEAR_ADDR);
	200
	201	}
	202
	203	static inline void isp1301_vbus_on(void)
	204	{
	205	i2c_write(OTG1_VBUS_DRV, ISP1301_I2C_OTG_CONTROL_1);
	206	}
	207
	208	static inline void isp1301_vbus_off(void)
	209	{
	210	i2c_write(OTG1_VBUS_DRV,
	211	ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR);
	212	}
	213
	214	static void pnx4008_start_hc(void)
	215	{
	216	unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) \| HOST_EN;
	217	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
	218	isp1301_vbus_on();
	219	}
	220
	221	static void pnx4008_stop_hc(void)
	222	{
	223	unsigned long tmp;
	224	isp1301_vbus_off();
	225	tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN;
	226	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
	227	}
	228
	229	static int __devinit ohci_pnx4008_start(struct usb_hcd *hcd)
	230	{
	231	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
232	int ret;
233
234	if ((ret = ohci_init(ohci)) < 0)
235	return ret;
236
237	if ((ret = ohci_run(ohci)) < 0) {
238	dev_err(hcd->self.controller, "can't start\n");
239	ohci_stop(hcd);
240	return ret;
241	}
242	return 0;
243	}
244
245	static const struct hc_driver ohci_pnx4008_hc_driver = {
246	.description = hcd_name,
247	.product_desc = "pnx4008 OHCI",
248
249	/*
250	* generic hardware linkage
251	*/
252	.irq = ohci_irq,
253	.flags = HCD_USB11 \| HCD_MEMORY,
254
255	.hcd_priv_size = sizeof(struct ohci_hcd),
256	/*
257	* basic lifecycle operations
258	*/
259	.start = ohci_pnx4008_start,
260	.stop = ohci_stop,
8442ae00	261	.shutdown = ohci_shutdown,
60bbfc84 VW	262
	263	/*
	264	* managing i/o requests and associated device resources
	265	*/
	266	.urb_enqueue = ohci_urb_enqueue,
	267	.urb_dequeue = ohci_urb_dequeue,
	268	.endpoint_disable = ohci_endpoint_disable,
	269
	270	/*
	271	* scheduling support
	272	*/
	273	.get_frame_number = ohci_get_frame,
	274
	275	/*
	276	* root hub support
	277	*/
	278	.hub_status_data = ohci_hub_status_data,
	279	.hub_control = ohci_hub_control,
09ca8adb	280	.hub_irq_enable = ohci_rhsc_enable,
8442ae00 DB	281	#ifdef CONFIG_PM
	282	.bus_suspend = ohci_bus_suspend,
	283	.bus_resume = ohci_bus_resume,
	284	#endif
60bbfc84 VW	285	.start_port_reset = ohci_start_port_reset,
	286	};
	287
	288	#define USB_CLOCK_MASK (AHB_M_CLOCK_ON\| OTG_CLOCK_ON \| HOST_CLOCK_ON \| I2C_CLOCK_ON)
	289
	290	static void pnx4008_set_usb_bits(void)
	291	{
	292	start_int_set_falling_edge(SE_USB_OTG_ATX_INT_N);
	293	start_int_ack(SE_USB_OTG_ATX_INT_N);
	294	start_int_umask(SE_USB_OTG_ATX_INT_N);
	295
	296	start_int_set_rising_edge(SE_USB_OTG_TIMER_INT);
	297	start_int_ack(SE_USB_OTG_TIMER_INT);
	298	start_int_umask(SE_USB_OTG_TIMER_INT);
	299
	300	start_int_set_rising_edge(SE_USB_I2C_INT);
	301	start_int_ack(SE_USB_I2C_INT);
	302	start_int_umask(SE_USB_I2C_INT);
	303
	304	start_int_set_rising_edge(SE_USB_INT);
	305	start_int_ack(SE_USB_INT);
	306	start_int_umask(SE_USB_INT);
	307
	308	start_int_set_rising_edge(SE_USB_NEED_CLK_INT);
	309	start_int_ack(SE_USB_NEED_CLK_INT);
	310	start_int_umask(SE_USB_NEED_CLK_INT);
	311
	312	start_int_set_rising_edge(SE_USB_AHB_NEED_CLK_INT);
	313	start_int_ack(SE_USB_AHB_NEED_CLK_INT);
	314	start_int_umask(SE_USB_AHB_NEED_CLK_INT);
	315	}
	316
	317	static void pnx4008_unset_usb_bits(void)
	318	{
	319	start_int_mask(SE_USB_OTG_ATX_INT_N);
	320	start_int_mask(SE_USB_OTG_TIMER_INT);
	321	start_int_mask(SE_USB_I2C_INT);
	322	start_int_mask(SE_USB_INT);
	323	start_int_mask(SE_USB_NEED_CLK_INT);
	324	start_int_mask(SE_USB_AHB_NEED_CLK_INT);
	325	}
	326
	327	static int __devinit usb_hcd_pnx4008_probe(struct platform_device *pdev)
	328	{
	329	struct usb_hcd *hcd = 0;
	330	struct ohci_hcd *ohci;
	331	const struct hc_driver *driver = &ohci_pnx4008_hc_driver;
	332
	333	int ret = 0, irq;
	334
	335	dev_dbg(&pdev->dev, "%s: " DRIVER_INFO " (pnx4008)\n", hcd_name);
	336	if (usb_disabled()) {
	337	err("USB is disabled");
	338	ret = -ENODEV;
	339	goto out;
	340	}
	341
	342	if (pdev->num_resources != 2
	343	\|\| pdev->resource[0].flags != IORESOURCE_MEM
	344	\|\| pdev->resource[1].flags != IORESOURCE_IRQ) {
	345	err("Invalid resource configuration");
	346	ret = -ENODEV;
	347	goto out;
	348	}
349
350	/* Enable AHB slave USB clock, needed for further USB clock control */
351	__raw_writel(USB_SLAVE_HCLK_EN \| (1 << 19), USB_CTRL);
352
353	ret = i2c_add_driver(&isp1301_driver);
354	if (ret < 0) {
355	err("failed to connect I2C to ISP1301 USB Transceiver");
356	goto out;
357	}
358
359	isp1301_configure();
360
361	/* Enable USB PLL */
362	usb_clk = clk_get(&pdev->dev, "ck_pll5");
363	if (IS_ERR(usb_clk)) {
364	err("failed to acquire USB PLL");
365	ret = PTR_ERR(usb_clk);
366	goto out1;
367	}
368
369	ret = clk_enable(usb_clk);
370	if (ret < 0) {
371	err("failed to start USB PLL");
372	goto out2;
373	}
374
375	ret = clk_set_rate(usb_clk, 48000);
376	if (ret < 0) {
377	err("failed to set USB clock rate");
378	goto out3;
379	}
380
381	__raw_writel(__raw_readl(USB_CTRL) \| USB_HOST_NEED_CLK_EN, USB_CTRL);
382
383	/* Set to enable all needed USB clocks */
384	__raw_writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL);
385
386	while ((__raw_readl(USB_OTG_CLK_STAT) & USB_CLOCK_MASK) !=
387	USB_CLOCK_MASK) ;
388
7071a3ce	389	hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
60bbfc84 VW	390	if (!hcd) {
	391	err("Failed to allocate HC buffer");
	392	ret = -ENOMEM;
	393	goto out3;
	394	}
	395
	396	/* Set all USB bits in the Start Enable register */
	397	pnx4008_set_usb_bits();
	398
	399	hcd->rsrc_start = pdev->resource[0].start;
	400	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
	401	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
	402	dev_dbg(&pdev->dev, "request_mem_region failed\n");
	403	ret = -ENOMEM;
	404	goto out4;
	405	}
	406	hcd->regs = (void __iomem *)pdev->resource[0].start;
	407
	408	irq = platform_get_irq(pdev, 0);
	409	if (irq < 0) {
	410	ret = -ENXIO;
	411	goto out4;
	412	}
	413
60bbfc84 VW	414	pnx4008_start_hc();
	415	platform_set_drvdata(pdev, hcd);
	416	ohci = hcd_to_ohci(hcd);
	417	ohci_hcd_init(ohci);
	418
	419	dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
38515e90	420	ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
60bbfc84 VW	421	if (ret == 0)
	422	return ret;
	423
	424	pnx4008_stop_hc();
	425	out4:
	426	pnx4008_unset_usb_bits();
	427	usb_put_hcd(hcd);
	428	out3:
	429	clk_disable(usb_clk);
	430	out2:
	431	clk_put(usb_clk);
	432	out1:
	433	i2c_del_driver(&isp1301_driver);
	434	out:
	435	return ret;
	436	}
	437
	438	static int usb_hcd_pnx4008_remove(struct platform_device *pdev)
	439	{
	440	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	441
	442	usb_remove_hcd(hcd);
	443	pnx4008_stop_hc();
	444	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	445	usb_put_hcd(hcd);
	446	pnx4008_unset_usb_bits();
	447	clk_disable(usb_clk);
	448	clk_put(usb_clk);
	449	i2c_del_driver(&isp1301_driver);
	450
	451	platform_set_drvdata(pdev, NULL);
	452
	453	return 0;
	454	}
	455
f4fce61d KS	456	/* work with hotplug and coldplug */
	457	MODULE_ALIAS("platform:usb-ohci");
	458
60bbfc84 VW	459	static struct platform_driver usb_hcd_pnx4008_driver = {
	460	.driver = {
	461	.name = "usb-ohci",
f4fce61d	462	.owner = THIS_MODULE,
60bbfc84 VW	463	},
	464	.probe = usb_hcd_pnx4008_probe,
	465	.remove = usb_hcd_pnx4008_remove,
	466	};
	467