/* * 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 1struct 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 unsigned short normal_i2c[] =    { ISP1301_I2C_ADDR, ISP1301_I2C_ADDR + 1, I2C_CLIENT_END };static 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 = {	.id = I2C_DRIVERID_I2CDEV,	/* Fake Id */	.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 = (struct i2c_client *)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,	.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, 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;}static struct platform_driver usb_hcd_pnx4008_driver = {	.driver = {		.name = "usb-ohci",	},	.probe = usb_hcd_pnx4008_probe,	.remove = usb_hcd_pnx4008_remove,};