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

/*
 * driver for NXP USB Host devices
 *
 * Currently supported OHCI host devices:
 * - NXP LPC32xx
 *
 * 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/dma-mapping.h>
#include <linux/io.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/usb/isp1301.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>

#include "ohci.h"


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

#include <mach/platform.h>
#include <mach/irqs.h>

#define USB_CONFIG_BASE		0x31020000
#define PWRMAN_BASE		0x40004000

#define USB_CTRL		IO_ADDRESS(PWRMAN_BASE + 0x64)

/* USB_CTRL bit defines */
#define USB_SLAVE_HCLK_EN	(1 << 24)
#define USB_DEV_NEED_CLK_EN	(1 << 22)
#define USB_HOST_NEED_CLK_EN	(1 << 21)
#define PAD_CONTROL_LAST_DRIVEN	(1 << 19)

#define USB_OTG_STAT_CONTROL	IO_ADDRESS(USB_CONFIG_BASE + 0x110)

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

/* On LPC32xx, those are undefined */
#ifndef start_int_set_falling_edge
#define start_int_set_falling_edge(irq)
#define start_int_set_rising_edge(irq)
#define start_int_ack(irq)
#define start_int_mask(irq)
#define start_int_umask(irq)
#endif

#define DRIVER_DESC "OHCI NXP driver"

static const char hcd_name[] = "ohci-nxp";
static struct hc_driver __read_mostly ohci_nxp_hc_driver;

static struct i2c_client *isp1301_i2c_client;

extern int usb_disabled(void);

static struct clk *usb_pll_clk;
static struct clk *usb_dev_clk;
static struct clk *usb_otg_clk;

static void isp1301_configure_lpc32xx(void)
{
	/* LPC32XX only supports DAT_SE0 USB mode */
	/* This sequence is important */

	/* Disable transparent UART mode first */
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		(ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
		MC1_UART_EN);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		(ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
		~MC1_SPEED_REG);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
				  ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		  (ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR),
		  ~0);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_MODE_CONTROL_2,
		(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL));
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		(ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_OTG_CONTROL_1,
		(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		(ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
		(OTG1_DM_PULLUP | OTG1_DP_PULLUP));
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR,
		~0);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);

	/* Enable usb_need_clk clock after transceiver is initialized */
	__raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL);

	printk(KERN_INFO "ISP1301 Vendor ID  : 0x%04x\n",
	      i2c_smbus_read_word_data(isp1301_i2c_client, 0x00));
	printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n",
	      i2c_smbus_read_word_data(isp1301_i2c_client, 0x02));
	printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n",
	      i2c_smbus_read_word_data(isp1301_i2c_client, 0x14));
}

static void isp1301_configure(void)
{
	isp1301_configure_lpc32xx();
}

static inline void isp1301_vbus_on(void)
{
	i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1,
				  OTG1_VBUS_DRV);
}

static inline void isp1301_vbus_off(void)
{
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR,
		OTG1_VBUS_DRV);
}

static void ohci_nxp_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 ohci_nxp_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 ohci_hcd_nxp_probe(struct platform_device *pdev)
{
	struct usb_hcd *hcd = 0;
	const struct hc_driver *driver = &ohci_nxp_hc_driver;
	struct resource *res;
	int ret = 0, irq;
	struct device_node *isp1301_node;

	if (pdev->dev.of_node) {
		isp1301_node = of_parse_phandle(pdev->dev.of_node,
						"transceiver", 0);
	} else {
		isp1301_node = NULL;
	}

	isp1301_i2c_client = isp1301_get_client(isp1301_node);
	if (!isp1301_i2c_client) {
		return -EPROBE_DEFER;
	}

	ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
	if (ret)
		goto fail_disable;

	dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
	if (usb_disabled()) {
		dev_err(&pdev->dev, "USB is disabled\n");
		ret = -ENODEV;
		goto fail_disable;
	}

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

	/* Enable USB PLL */
	usb_pll_clk = devm_clk_get(&pdev->dev, "ck_pll5");
	if (IS_ERR(usb_pll_clk)) {
		dev_err(&pdev->dev, "failed to acquire USB PLL\n");
		ret = PTR_ERR(usb_pll_clk);
		goto fail_disable;
	}

	ret = clk_enable(usb_pll_clk);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to start USB PLL\n");
		goto fail_disable;
	}

	ret = clk_set_rate(usb_pll_clk, 48000);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to set USB clock rate\n");
		goto fail_rate;
	}

	/* Enable USB device clock */
	usb_dev_clk = devm_clk_get(&pdev->dev, "ck_usbd");
	if (IS_ERR(usb_dev_clk)) {
		dev_err(&pdev->dev, "failed to acquire USB DEV Clock\n");
		ret = PTR_ERR(usb_dev_clk);
		goto fail_rate;
	}

	ret = clk_enable(usb_dev_clk);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to start USB DEV Clock\n");
		goto fail_rate;
	}

	/* Enable USB otg clocks */
	usb_otg_clk = devm_clk_get(&pdev->dev, "ck_usb_otg");
	if (IS_ERR(usb_otg_clk)) {
		dev_err(&pdev->dev, "failed to acquire USB DEV Clock\n");
		ret = PTR_ERR(usb_otg_clk);
		goto fail_otg;
	}

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

	ret = clk_enable(usb_otg_clk);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to start USB DEV Clock\n");
		goto fail_otg;
	}

	isp1301_configure();

	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
	if (!hcd) {
		dev_err(&pdev->dev, "Failed to allocate HC buffer\n");
		ret = -ENOMEM;
		goto fail_hcd;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(hcd->regs)) {
		ret = PTR_ERR(hcd->regs);
		goto fail_resource;
	}
	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);

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

	ohci_nxp_start_hc();
	platform_set_drvdata(pdev, hcd);

	dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
	ret = usb_add_hcd(hcd, irq, 0);
	if (ret == 0) {
		device_wakeup_enable(hcd->self.controller);
		return ret;
	}

	ohci_nxp_stop_hc();
fail_resource:
	usb_put_hcd(hcd);
fail_hcd:
	clk_disable(usb_otg_clk);
fail_otg:
	clk_disable(usb_dev_clk);
fail_rate:
	clk_disable(usb_pll_clk);
fail_disable:
	isp1301_i2c_client = NULL;
	return ret;
}

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

	usb_remove_hcd(hcd);
	ohci_nxp_stop_hc();
	usb_put_hcd(hcd);
	clk_disable(usb_pll_clk);
	clk_disable(usb_dev_clk);
	i2c_unregister_device(isp1301_i2c_client);
	isp1301_i2c_client = NULL;

	return 0;
}

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

#ifdef CONFIG_OF
static const struct of_device_id ohci_hcd_nxp_match[] = {
	{ .compatible = "nxp,ohci-nxp" },
	{},
};
MODULE_DEVICE_TABLE(of, ohci_hcd_nxp_match);
#endif

static struct platform_driver ohci_hcd_nxp_driver = {
	.driver = {
		.name = "usb-ohci",
		.of_match_table = of_match_ptr(ohci_hcd_nxp_match),
	},
	.probe = ohci_hcd_nxp_probe,
	.remove = ohci_hcd_nxp_remove,
};

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

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

	ohci_init_driver(&ohci_nxp_hc_driver, NULL);
	return platform_driver_register(&ohci_hcd_nxp_driver);
}
module_init(ohci_nxp_init);

static void __exit ohci_nxp_cleanup(void)
{
	platform_driver_unregister(&ohci_hcd_nxp_driver);
}
module_exit(ohci_nxp_cleanup);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL v2");
Commit	Line	Data
60bbfc84	1	/*
28643104	2	* driver for NXP USB Host devices
60bbfc84	3	*
28643104	4	* Currently supported OHCI host devices:
53dc25ad	5	* - NXP LPC32xx
60bbfc84 VW	6	*
60bbfc84 VW	7	* Authors: Dmitry Chigirev <source@mvista.com>
dd9048af	8	* Vitaly Wool <vitalywool@gmail.com>
60bbfc84 VW	9	*
	10	* register initialization is based on code examples provided by Philips
	11	* Copyright (c) 2005 Koninklijke Philips Electronics N.V.
	12	*
	13	* NOTE: This driver does not have suspend/resume functionality
	14	* This driver is intended for engineering development purposes only
	15	*
	16	* 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
	17	* the terms of the GNU General Public License version 2. This program
	18	* is licensed "as is" without any warranty of any kind, whether express
	19	* or implied.
	20	*/
	21	#include <linux/clk.h>
30330b8f MG	22	#include <linux/dma-mapping.h>
30330b8f MG	23	#include <linux/io.h>
60bbfc84	24	#include <linux/i2c.h>
30330b8f MG	25	#include <linux/kernel.h>
30330b8f MG	26	#include <linux/module.h>
2265efea	27	#include <linux/of.h>
30330b8f	28	#include <linux/platform_device.h>
73108aa9	29	#include <linux/usb/isp1301.h>
30330b8f MG	30	#include <linux/usb.h>
	31	#include <linux/usb/hcd.h>
	32
	33	#include "ohci.h"
	34
60bbfc84	35
a09e64fb	36	#include <mach/hardware.h>
53dc25ad	37	#include <asm/mach-types.h>
60bbfc84	38	#include <asm/io.h>
60bbfc84	39
a09e64fb RK	40	#include <mach/platform.h>
a09e64fb RK	41	#include <mach/irqs.h>
60bbfc84	42
53dc25ad RS	43	#define USB_CONFIG_BASE 0x31020000
	44	#define PWRMAN_BASE 0x40004000
	45
	46	#define USB_CTRL IO_ADDRESS(PWRMAN_BASE + 0x64)
60bbfc84 VW	47
	48	/* USB_CTRL bit defines */
	49	#define USB_SLAVE_HCLK_EN (1 << 24)
a6a99cf0	50	#define USB_DEV_NEED_CLK_EN (1 << 22)
60bbfc84	51	#define USB_HOST_NEED_CLK_EN (1 << 21)
a6a99cf0	52	#define PAD_CONTROL_LAST_DRIVEN (1 << 19)
60bbfc84	53
53dc25ad	54	#define USB_OTG_STAT_CONTROL IO_ADDRESS(USB_CONFIG_BASE + 0x110)
60bbfc84 VW	55
	56	/* USB_OTG_STAT_CONTROL bit defines */
	57	#define TRANSPARENT_I2C_EN (1 << 7)
	58	#define HOST_EN (1 << 0)
	59
53dc25ad RS	60	/* On LPC32xx, those are undefined */
	61	#ifndef start_int_set_falling_edge
	62	#define start_int_set_falling_edge(irq)
	63	#define start_int_set_rising_edge(irq)
	64	#define start_int_ack(irq)
	65	#define start_int_mask(irq)
	66	#define start_int_umask(irq)
	67	#endif
	68
30330b8f MG	69	#define DRIVER_DESC "OHCI NXP driver"
	70
	71	static const char hcd_name[] = "ohci-nxp";
	72	static struct hc_driver __read_mostly ohci_nxp_hc_driver;
	73
09ce497e	74	static struct i2c_client *isp1301_i2c_client;
60bbfc84 VW	75
60bbfc84 VW	76	extern int usb_disabled(void);
60bbfc84	77
78091dc2 APS	78	static struct clk *usb_pll_clk;
	79	static struct clk *usb_dev_clk;
	80	static struct clk *usb_otg_clk;
60bbfc84	81
53dc25ad RS	82	static void isp1301_configure_lpc32xx(void)
	83	{
	84	/* LPC32XX only supports DAT_SE0 USB mode */
	85	/* This sequence is important */
	86
	87	/* Disable transparent UART mode first */
	88	i2c_smbus_write_byte_data(isp1301_i2c_client,
	89	(ISP1301_I2C_MODE_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR),
	90	MC1_UART_EN);
	91	i2c_smbus_write_byte_data(isp1301_i2c_client,
	92	(ISP1301_I2C_MODE_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR),
	93	~MC1_SPEED_REG);
	94	i2c_smbus_write_byte_data(isp1301_i2c_client,
	95	ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG);
	96	i2c_smbus_write_byte_data(isp1301_i2c_client,
	97	(ISP1301_I2C_MODE_CONTROL_2 \| ISP1301_I2C_REG_CLEAR_ADDR),
	98	~0);
	99	i2c_smbus_write_byte_data(isp1301_i2c_client,
	100	ISP1301_I2C_MODE_CONTROL_2,
	101	(MC2_BI_DI \| MC2_PSW_EN \| MC2_SPD_SUSP_CTRL));
	102	i2c_smbus_write_byte_data(isp1301_i2c_client,
	103	(ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR), ~0);
	104	i2c_smbus_write_byte_data(isp1301_i2c_client,
	105	ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0);
	106	i2c_smbus_write_byte_data(isp1301_i2c_client,
	107	ISP1301_I2C_OTG_CONTROL_1,
	108	(OTG1_DM_PULLDOWN \| OTG1_DP_PULLDOWN));
	109	i2c_smbus_write_byte_data(isp1301_i2c_client,
	110	(ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR),
	111	(OTG1_DM_PULLUP \| OTG1_DP_PULLUP));
	112	i2c_smbus_write_byte_data(isp1301_i2c_client,
	113	ISP1301_I2C_INTERRUPT_LATCH \| ISP1301_I2C_REG_CLEAR_ADDR, ~0);
	114	i2c_smbus_write_byte_data(isp1301_i2c_client,
	115	ISP1301_I2C_INTERRUPT_FALLING \| ISP1301_I2C_REG_CLEAR_ADDR,
	116	~0);
	117	i2c_smbus_write_byte_data(isp1301_i2c_client,
	118	ISP1301_I2C_INTERRUPT_RISING \| ISP1301_I2C_REG_CLEAR_ADDR, ~0);
	119
	120	/* Enable usb_need_clk clock after transceiver is initialized */
a6a99cf0	121	__raw_writel(__raw_readl(USB_CTRL) \| USB_HOST_NEED_CLK_EN, USB_CTRL);
53dc25ad RS	122
	123	printk(KERN_INFO "ISP1301 Vendor ID : 0x%04x\n",
	124	i2c_smbus_read_word_data(isp1301_i2c_client, 0x00));
	125	printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n",
	126	i2c_smbus_read_word_data(isp1301_i2c_client, 0x02));
	127	printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n",
	128	i2c_smbus_read_word_data(isp1301_i2c_client, 0x14));
	129	}
	130
	131	static void isp1301_configure(void)
	132	{
d684f05f	133	isp1301_configure_lpc32xx();
60bbfc84 VW	134	}
	135
	136	static inline void isp1301_vbus_on(void)
	137	{
a6a36008 RS	138	i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1,
a6a36008 RS	139	OTG1_VBUS_DRV);
60bbfc84 VW	140	}
	141
	142	static inline void isp1301_vbus_off(void)
	143	{
a6a36008 RS	144	i2c_smbus_write_byte_data(isp1301_i2c_client,
	145	ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR,
	146	OTG1_VBUS_DRV);
60bbfc84 VW	147	}
60bbfc84 VW	148
30330b8f	149	static void ohci_nxp_start_hc(void)
60bbfc84 VW	150	{
	151	unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) \| HOST_EN;
	152	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
	153	isp1301_vbus_on();
	154	}
	155
30330b8f	156	static void ohci_nxp_stop_hc(void)
60bbfc84 VW	157	{
	158	unsigned long tmp;
	159	isp1301_vbus_off();
	160	tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN;
	161	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
	162	}
	163
30330b8f	164	static int ohci_hcd_nxp_probe(struct platform_device *pdev)
60bbfc84 VW	165	{
60bbfc84 VW	166	struct usb_hcd *hcd = 0;
28643104	167	const struct hc_driver *driver = &ohci_nxp_hc_driver;
a6a99cf0	168	struct resource *res;
60bbfc84	169	int ret = 0, irq;
73108aa9 RS	170	struct device_node *isp1301_node;
	171
	172	if (pdev->dev.of_node) {
	173	isp1301_node = of_parse_phandle(pdev->dev.of_node,
	174	"transceiver", 0);
	175	} else {
	176	isp1301_node = NULL;
	177	}
	178
	179	isp1301_i2c_client = isp1301_get_client(isp1301_node);
	180	if (!isp1301_i2c_client) {
b3517d5d	181	return -EPROBE_DEFER;
73108aa9	182	}
60bbfc84	183
e1fd7341	184	ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
22d9d8e8 RK	185	if (ret)
22d9d8e8 RK	186	goto fail_disable;
a6a99cf0	187
28643104	188	dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
60bbfc84	189	if (usb_disabled()) {
b6c227ed	190	dev_err(&pdev->dev, "USB is disabled\n");
60bbfc84	191	ret = -ENODEV;
b3517d5d	192	goto fail_disable;
60bbfc84 VW	193	}
60bbfc84 VW	194
60bbfc84	195	/* Enable AHB slave USB clock, needed for further USB clock control */
a6a99cf0	196	__raw_writel(USB_SLAVE_HCLK_EN \| PAD_CONTROL_LAST_DRIVEN, USB_CTRL);
60bbfc84	197
60bbfc84	198	/* Enable USB PLL */
ac8d81f3	199	usb_pll_clk = devm_clk_get(&pdev->dev, "ck_pll5");
78091dc2	200	if (IS_ERR(usb_pll_clk)) {
b6c227ed	201	dev_err(&pdev->dev, "failed to acquire USB PLL\n");
78091dc2	202	ret = PTR_ERR(usb_pll_clk);
ac8d81f3	203	goto fail_disable;
60bbfc84 VW	204	}
60bbfc84 VW	205
78091dc2	206	ret = clk_enable(usb_pll_clk);
60bbfc84	207	if (ret < 0) {
b6c227ed	208	dev_err(&pdev->dev, "failed to start USB PLL\n");
ac8d81f3	209	goto fail_disable;
60bbfc84 VW	210	}
60bbfc84 VW	211
78091dc2	212	ret = clk_set_rate(usb_pll_clk, 48000);
60bbfc84	213	if (ret < 0) {
b6c227ed	214	dev_err(&pdev->dev, "failed to set USB clock rate\n");
b3517d5d	215	goto fail_rate;
60bbfc84 VW	216	}
60bbfc84 VW	217
78091dc2	218	/* Enable USB device clock */
ac8d81f3	219	usb_dev_clk = devm_clk_get(&pdev->dev, "ck_usbd");
78091dc2 APS	220	if (IS_ERR(usb_dev_clk)) {
	221	dev_err(&pdev->dev, "failed to acquire USB DEV Clock\n");
	222	ret = PTR_ERR(usb_dev_clk);
ac8d81f3	223	goto fail_rate;
78091dc2 APS	224	}
	225
	226	ret = clk_enable(usb_dev_clk);
	227	if (ret < 0) {
	228	dev_err(&pdev->dev, "failed to start USB DEV Clock\n");
ac8d81f3	229	goto fail_rate;
78091dc2 APS	230	}
	231
	232	/* Enable USB otg clocks */
ac8d81f3	233	usb_otg_clk = devm_clk_get(&pdev->dev, "ck_usb_otg");
78091dc2 APS	234	if (IS_ERR(usb_otg_clk)) {
78091dc2 APS	235	dev_err(&pdev->dev, "failed to acquire USB DEV Clock\n");
2ec15a6f	236	ret = PTR_ERR(usb_otg_clk);
b3517d5d	237	goto fail_otg;
78091dc2 APS	238	}
78091dc2 APS	239
60bbfc84 VW	240	__raw_writel(__raw_readl(USB_CTRL) \| USB_HOST_NEED_CLK_EN, USB_CTRL);
60bbfc84 VW	241
78091dc2 APS	242	ret = clk_enable(usb_otg_clk);
	243	if (ret < 0) {
	244	dev_err(&pdev->dev, "failed to start USB DEV Clock\n");
ac8d81f3	245	goto fail_otg;
78091dc2	246	}
60bbfc84	247
78091dc2	248	isp1301_configure();
60bbfc84	249
a6a99cf0	250	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
60bbfc84	251	if (!hcd) {
b6c227ed	252	dev_err(&pdev->dev, "Failed to allocate HC buffer\n");
60bbfc84	253	ret = -ENOMEM;
b3517d5d	254	goto fail_hcd;
60bbfc84 VW	255	}
60bbfc84 VW	256
a6a99cf0	257	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
148e1134 TR	258	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	259	if (IS_ERR(hcd->regs)) {
	260	ret = PTR_ERR(hcd->regs);
b3517d5d	261	goto fail_resource;
60bbfc84	262	}
a6a99cf0 RS	263	hcd->rsrc_start = res->start;
a6a99cf0 RS	264	hcd->rsrc_len = resource_size(res);
60bbfc84 VW	265
	266	irq = platform_get_irq(pdev, 0);
	267	if (irq < 0) {
	268	ret = -ENXIO;
b3517d5d	269	goto fail_resource;
60bbfc84 VW	270	}
60bbfc84 VW	271
30330b8f	272	ohci_nxp_start_hc();
60bbfc84	273	platform_set_drvdata(pdev, hcd);
60bbfc84 VW	274
60bbfc84 VW	275	dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
b5dd18d8	276	ret = usb_add_hcd(hcd, irq, 0);
3c9740a1 PC	277	if (ret == 0) {
3c9740a1 PC	278	device_wakeup_enable(hcd->self.controller);
60bbfc84	279	return ret;
3c9740a1	280	}
60bbfc84	281
30330b8f	282	ohci_nxp_stop_hc();
b3517d5d	283	fail_resource:
60bbfc84	284	usb_put_hcd(hcd);
b3517d5d	285	fail_hcd:
78091dc2	286	clk_disable(usb_otg_clk);
b3517d5d	287	fail_otg:
78091dc2	288	clk_disable(usb_dev_clk);
b3517d5d	289	fail_rate:
78091dc2	290	clk_disable(usb_pll_clk);
b3517d5d	291	fail_disable:
3a407e73	292	isp1301_i2c_client = NULL;
60bbfc84 VW	293	return ret;
	294	}
	295
30330b8f	296	static int ohci_hcd_nxp_remove(struct platform_device *pdev)
60bbfc84 VW	297	{
	298	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	299
	300	usb_remove_hcd(hcd);
30330b8f	301	ohci_nxp_stop_hc();
60bbfc84	302	usb_put_hcd(hcd);
78091dc2	303	clk_disable(usb_pll_clk);
78091dc2	304	clk_disable(usb_dev_clk);
8740cc7d	305	i2c_unregister_device(isp1301_i2c_client);
3a407e73	306	isp1301_i2c_client = NULL;
60bbfc84	307
60bbfc84 VW	308	return 0;
	309	}
	310
f4fce61d KS	311	/* work with hotplug and coldplug */
	312	MODULE_ALIAS("platform:usb-ohci");
	313
2265efea	314	#ifdef CONFIG_OF
30330b8f	315	static const struct of_device_id ohci_hcd_nxp_match[] = {
2265efea RS	316	{ .compatible = "nxp,ohci-nxp" },
	317	{},
	318	};
30330b8f	319	MODULE_DEVICE_TABLE(of, ohci_hcd_nxp_match);
2265efea RS	320	#endif
2265efea RS	321
30330b8f	322	static struct platform_driver ohci_hcd_nxp_driver = {
60bbfc84 VW	323	.driver = {
60bbfc84 VW	324	.name = "usb-ohci",
30330b8f	325	.of_match_table = of_match_ptr(ohci_hcd_nxp_match),
60bbfc84	326	},
30330b8f MG	327	.probe = ohci_hcd_nxp_probe,
30330b8f MG	328	.remove = ohci_hcd_nxp_remove,
60bbfc84 VW	329	};
60bbfc84 VW	330
30330b8f MG	331	static int __init ohci_nxp_init(void)
	332	{
	333	if (usb_disabled())
	334	return -ENODEV;
	335
	336	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	337
	338	ohci_init_driver(&ohci_nxp_hc_driver, NULL);
	339	return platform_driver_register(&ohci_hcd_nxp_driver);
	340	}
	341	module_init(ohci_nxp_init);
	342
	343	static void __exit ohci_nxp_cleanup(void)
	344	{
	345	platform_driver_unregister(&ohci_hcd_nxp_driver);
	346	}
	347	module_exit(ohci_nxp_cleanup);
	348
	349	MODULE_DESCRIPTION(DRIVER_DESC);
	350	MODULE_LICENSE("GPL v2");