[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/platform_device.h>
#include <linux/i2c.h>
#include <linux/of.h>
#include <linux/usb/isp1301.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

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 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 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_nxp_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_nxp_hc_driver = {
	.description = hcd_name,
	.product_desc =		"nxp OHCI",

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

	.hcd_priv_size =	sizeof(struct ohci_hcd),
	/*
	 * basic lifecycle operations
	 */
	.start = ohci_nxp_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,
};

static int usb_hcd_nxp_probe(struct platform_device *pdev)
{
	struct usb_hcd *hcd = 0;
	struct ohci_hcd *ohci;
	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) {
		ret = -EPROBE_DEFER;
		goto out;
	}

	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
	pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;

	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 out;
	}

	/* 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 = 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 out1;
	}

	ret = clk_enable(usb_pll_clk);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to start USB PLL\n");
		goto out2;
	}

	ret = clk_set_rate(usb_pll_clk, 48000);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to set USB clock rate\n");
		goto out3;
	}

	/* Enable USB device clock */
	usb_dev_clk = 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 out4;
	}

	ret = clk_enable(usb_dev_clk);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to start USB DEV Clock\n");
		goto out5;
	}

	/* Enable USB otg clocks */
	usb_otg_clk = 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 out6;
	}

	__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 out7;
	}

	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 out8;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(&pdev->dev, "Failed to get MEM resource\n");
		ret =  -ENOMEM;
		goto out8;
	}

	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(hcd->regs)) {
		ret = PTR_ERR(hcd->regs);
		goto out8;
	}
	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		ret = -ENXIO;
		goto out8;
	}

	nxp_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, 0);
	if (ret == 0)
		return ret;

	nxp_stop_hc();
out8:
	usb_put_hcd(hcd);
out7:
	clk_disable(usb_otg_clk);
out6:
	clk_put(usb_otg_clk);
out5:
	clk_disable(usb_dev_clk);
out4:
	clk_put(usb_dev_clk);
out3:
	clk_disable(usb_pll_clk);
out2:
	clk_put(usb_pll_clk);
out1:
	isp1301_i2c_client = NULL;
out:
	return ret;
}

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

	usb_remove_hcd(hcd);
	nxp_stop_hc();
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
	clk_disable(usb_pll_clk);
	clk_put(usb_pll_clk);
	clk_disable(usb_dev_clk);
	clk_put(usb_dev_clk);
	i2c_unregister_device(isp1301_i2c_client);
	isp1301_i2c_client = NULL;

	platform_set_drvdata(pdev, NULL);

	return 0;
}

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

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

static struct platform_driver usb_hcd_nxp_driver = {
	.driver = {
		.name = "usb-ohci",
		.owner	= THIS_MODULE,
		.of_match_table = of_match_ptr(usb_hcd_nxp_match),
	},
	.probe = usb_hcd_nxp_probe,
	.remove = usb_hcd_nxp_remove,
};
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>
	22	#include <linux/platform_device.h>
	23	#include <linux/i2c.h>
2265efea	24	#include <linux/of.h>
73108aa9	25	#include <linux/usb/isp1301.h>
60bbfc84	26
a09e64fb	27	#include <mach/hardware.h>
53dc25ad	28	#include <asm/mach-types.h>
60bbfc84	29	#include <asm/io.h>
60bbfc84	30
a09e64fb RK	31	#include <mach/platform.h>
a09e64fb RK	32	#include <mach/irqs.h>
60bbfc84	33
53dc25ad RS	34	#define USB_CONFIG_BASE 0x31020000
	35	#define PWRMAN_BASE 0x40004000
	36
	37	#define USB_CTRL IO_ADDRESS(PWRMAN_BASE + 0x64)
60bbfc84 VW	38
	39	/* USB_CTRL bit defines */
	40	#define USB_SLAVE_HCLK_EN (1 << 24)
a6a99cf0	41	#define USB_DEV_NEED_CLK_EN (1 << 22)
60bbfc84	42	#define USB_HOST_NEED_CLK_EN (1 << 21)
a6a99cf0	43	#define PAD_CONTROL_LAST_DRIVEN (1 << 19)
60bbfc84	44
53dc25ad	45	#define USB_OTG_STAT_CONTROL IO_ADDRESS(USB_CONFIG_BASE + 0x110)
60bbfc84 VW	46
	47	/* USB_OTG_STAT_CONTROL bit defines */
	48	#define TRANSPARENT_I2C_EN (1 << 7)
	49	#define HOST_EN (1 << 0)
	50
53dc25ad RS	51	/* On LPC32xx, those are undefined */
	52	#ifndef start_int_set_falling_edge
	53	#define start_int_set_falling_edge(irq)
	54	#define start_int_set_rising_edge(irq)
	55	#define start_int_ack(irq)
	56	#define start_int_mask(irq)
	57	#define start_int_umask(irq)
	58	#endif
	59
09ce497e	60	static struct i2c_client *isp1301_i2c_client;
60bbfc84 VW	61
60bbfc84 VW	62	extern int usb_disabled(void);
60bbfc84	63
78091dc2 APS	64	static struct clk *usb_pll_clk;
	65	static struct clk *usb_dev_clk;
	66	static struct clk *usb_otg_clk;
60bbfc84	67
53dc25ad RS	68	static void isp1301_configure_lpc32xx(void)
	69	{
	70	/* LPC32XX only supports DAT_SE0 USB mode */
	71	/* This sequence is important */
	72
	73	/* Disable transparent UART mode first */
	74	i2c_smbus_write_byte_data(isp1301_i2c_client,
	75	(ISP1301_I2C_MODE_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR),
	76	MC1_UART_EN);
	77	i2c_smbus_write_byte_data(isp1301_i2c_client,
	78	(ISP1301_I2C_MODE_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR),
	79	~MC1_SPEED_REG);
	80	i2c_smbus_write_byte_data(isp1301_i2c_client,
	81	ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG);
	82	i2c_smbus_write_byte_data(isp1301_i2c_client,
	83	(ISP1301_I2C_MODE_CONTROL_2 \| ISP1301_I2C_REG_CLEAR_ADDR),
	84	~0);
	85	i2c_smbus_write_byte_data(isp1301_i2c_client,
	86	ISP1301_I2C_MODE_CONTROL_2,
	87	(MC2_BI_DI \| MC2_PSW_EN \| MC2_SPD_SUSP_CTRL));
	88	i2c_smbus_write_byte_data(isp1301_i2c_client,
	89	(ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR), ~0);
	90	i2c_smbus_write_byte_data(isp1301_i2c_client,
	91	ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0);
	92	i2c_smbus_write_byte_data(isp1301_i2c_client,
	93	ISP1301_I2C_OTG_CONTROL_1,
	94	(OTG1_DM_PULLDOWN \| OTG1_DP_PULLDOWN));
	95	i2c_smbus_write_byte_data(isp1301_i2c_client,
	96	(ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR),
	97	(OTG1_DM_PULLUP \| OTG1_DP_PULLUP));
	98	i2c_smbus_write_byte_data(isp1301_i2c_client,
	99	ISP1301_I2C_INTERRUPT_LATCH \| ISP1301_I2C_REG_CLEAR_ADDR, ~0);
	100	i2c_smbus_write_byte_data(isp1301_i2c_client,
	101	ISP1301_I2C_INTERRUPT_FALLING \| ISP1301_I2C_REG_CLEAR_ADDR,
	102	~0);
	103	i2c_smbus_write_byte_data(isp1301_i2c_client,
	104	ISP1301_I2C_INTERRUPT_RISING \| ISP1301_I2C_REG_CLEAR_ADDR, ~0);
	105
	106	/* Enable usb_need_clk clock after transceiver is initialized */
a6a99cf0	107	__raw_writel(__raw_readl(USB_CTRL) \| USB_HOST_NEED_CLK_EN, USB_CTRL);
53dc25ad RS	108
	109	printk(KERN_INFO "ISP1301 Vendor ID : 0x%04x\n",
	110	i2c_smbus_read_word_data(isp1301_i2c_client, 0x00));
	111	printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n",
	112	i2c_smbus_read_word_data(isp1301_i2c_client, 0x02));
	113	printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n",
	114	i2c_smbus_read_word_data(isp1301_i2c_client, 0x14));
	115	}
	116
	117	static void isp1301_configure(void)
	118	{
d684f05f	119	isp1301_configure_lpc32xx();
60bbfc84 VW	120	}
	121
	122	static inline void isp1301_vbus_on(void)
	123	{
a6a36008 RS	124	i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1,
a6a36008 RS	125	OTG1_VBUS_DRV);
60bbfc84 VW	126	}
	127
	128	static inline void isp1301_vbus_off(void)
	129	{
a6a36008 RS	130	i2c_smbus_write_byte_data(isp1301_i2c_client,
	131	ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR,
	132	OTG1_VBUS_DRV);
60bbfc84 VW	133	}
60bbfc84 VW	134
28643104	135	static void nxp_start_hc(void)
60bbfc84 VW	136	{
	137	unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) \| HOST_EN;
	138	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
	139	isp1301_vbus_on();
	140	}
	141
28643104	142	static void nxp_stop_hc(void)
60bbfc84 VW	143	{
	144	unsigned long tmp;
	145	isp1301_vbus_off();
	146	tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN;
	147	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
	148	}
	149
41ac7b3a	150	static int ohci_nxp_start(struct usb_hcd *hcd)
60bbfc84 VW	151	{
	152	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	153	int ret;
	154
	155	if ((ret = ohci_init(ohci)) < 0)
	156	return ret;
	157
	158	if ((ret = ohci_run(ohci)) < 0) {
	159	dev_err(hcd->self.controller, "can't start\n");
	160	ohci_stop(hcd);
	161	return ret;
	162	}
	163	return 0;
	164	}
	165
28643104	166	static const struct hc_driver ohci_nxp_hc_driver = {
60bbfc84	167	.description = hcd_name,
28643104	168	.product_desc = "nxp OHCI",
60bbfc84 VW	169
	170	/*
	171	* generic hardware linkage
	172	*/
	173	.irq = ohci_irq,
	174	.flags = HCD_USB11 \| HCD_MEMORY,
	175
	176	.hcd_priv_size = sizeof(struct ohci_hcd),
	177	/*
	178	* basic lifecycle operations
	179	*/
28643104	180	.start = ohci_nxp_start,
60bbfc84	181	.stop = ohci_stop,
8442ae00	182	.shutdown = ohci_shutdown,
60bbfc84 VW	183
	184	/*
	185	* managing i/o requests and associated device resources
	186	*/
	187	.urb_enqueue = ohci_urb_enqueue,
	188	.urb_dequeue = ohci_urb_dequeue,
	189	.endpoint_disable = ohci_endpoint_disable,
	190
	191	/*
	192	* scheduling support
	193	*/
	194	.get_frame_number = ohci_get_frame,
	195
	196	/*
	197	* root hub support
	198	*/
	199	.hub_status_data = ohci_hub_status_data,
	200	.hub_control = ohci_hub_control,
8442ae00 DB	201	#ifdef CONFIG_PM
	202	.bus_suspend = ohci_bus_suspend,
	203	.bus_resume = ohci_bus_resume,
	204	#endif
60bbfc84 VW	205	.start_port_reset = ohci_start_port_reset,
	206	};
	207
41ac7b3a	208	static int usb_hcd_nxp_probe(struct platform_device *pdev)
60bbfc84 VW	209	{
	210	struct usb_hcd *hcd = 0;
	211	struct ohci_hcd *ohci;
28643104	212	const struct hc_driver *driver = &ohci_nxp_hc_driver;
a6a99cf0	213	struct resource *res;
60bbfc84	214	int ret = 0, irq;
73108aa9 RS	215	struct device_node *isp1301_node;
	216
	217	if (pdev->dev.of_node) {
	218	isp1301_node = of_parse_phandle(pdev->dev.of_node,
	219	"transceiver", 0);
	220	} else {
	221	isp1301_node = NULL;
	222	}
	223
	224	isp1301_i2c_client = isp1301_get_client(isp1301_node);
	225	if (!isp1301_i2c_client) {
	226	ret = -EPROBE_DEFER;
	227	goto out;
	228	}
60bbfc84	229
a6a99cf0 RS	230	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
	231	pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
	232
28643104	233	dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
60bbfc84	234	if (usb_disabled()) {
b6c227ed	235	dev_err(&pdev->dev, "USB is disabled\n");
60bbfc84 VW	236	ret = -ENODEV;
	237	goto out;
	238	}
	239
60bbfc84	240	/* Enable AHB slave USB clock, needed for further USB clock control */
a6a99cf0	241	__raw_writel(USB_SLAVE_HCLK_EN \| PAD_CONTROL_LAST_DRIVEN, USB_CTRL);
60bbfc84	242
60bbfc84	243	/* Enable USB PLL */
78091dc2 APS	244	usb_pll_clk = clk_get(&pdev->dev, "ck_pll5");
78091dc2 APS	245	if (IS_ERR(usb_pll_clk)) {
b6c227ed	246	dev_err(&pdev->dev, "failed to acquire USB PLL\n");
78091dc2	247	ret = PTR_ERR(usb_pll_clk);
60bbfc84 VW	248	goto out1;
	249	}
	250
78091dc2	251	ret = clk_enable(usb_pll_clk);
60bbfc84	252	if (ret < 0) {
b6c227ed	253	dev_err(&pdev->dev, "failed to start USB PLL\n");
60bbfc84 VW	254	goto out2;
	255	}
	256
78091dc2	257	ret = clk_set_rate(usb_pll_clk, 48000);
60bbfc84	258	if (ret < 0) {
b6c227ed	259	dev_err(&pdev->dev, "failed to set USB clock rate\n");
60bbfc84 VW	260	goto out3;
	261	}
	262
78091dc2 APS	263	/* Enable USB device clock */
	264	usb_dev_clk = clk_get(&pdev->dev, "ck_usbd");
	265	if (IS_ERR(usb_dev_clk)) {
	266	dev_err(&pdev->dev, "failed to acquire USB DEV Clock\n");
	267	ret = PTR_ERR(usb_dev_clk);
	268	goto out4;
	269	}
	270
	271	ret = clk_enable(usb_dev_clk);
	272	if (ret < 0) {
	273	dev_err(&pdev->dev, "failed to start USB DEV Clock\n");
	274	goto out5;
	275	}
	276
	277	/* Enable USB otg clocks */
	278	usb_otg_clk = clk_get(&pdev->dev, "ck_usb_otg");
	279	if (IS_ERR(usb_otg_clk)) {
	280	dev_err(&pdev->dev, "failed to acquire USB DEV Clock\n");
2ec15a6f	281	ret = PTR_ERR(usb_otg_clk);
78091dc2 APS	282	goto out6;
	283	}
	284
60bbfc84 VW	285	__raw_writel(__raw_readl(USB_CTRL) \| USB_HOST_NEED_CLK_EN, USB_CTRL);
60bbfc84 VW	286
78091dc2 APS	287	ret = clk_enable(usb_otg_clk);
	288	if (ret < 0) {
	289	dev_err(&pdev->dev, "failed to start USB DEV Clock\n");
	290	goto out7;
	291	}
60bbfc84	292
78091dc2	293	isp1301_configure();
60bbfc84	294
a6a99cf0	295	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
60bbfc84	296	if (!hcd) {
b6c227ed	297	dev_err(&pdev->dev, "Failed to allocate HC buffer\n");
60bbfc84	298	ret = -ENOMEM;
78091dc2	299	goto out8;
60bbfc84 VW	300	}
60bbfc84 VW	301
a6a99cf0 RS	302	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	303	if (!res) {
	304	dev_err(&pdev->dev, "Failed to get MEM resource\n");
	305	ret = -ENOMEM;
78091dc2	306	goto out8;
a6a99cf0 RS	307	}
a6a99cf0 RS	308
148e1134 TR	309	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	310	if (IS_ERR(hcd->regs)) {
	311	ret = PTR_ERR(hcd->regs);
78091dc2	312	goto out8;
60bbfc84	313	}
a6a99cf0 RS	314	hcd->rsrc_start = res->start;
a6a99cf0 RS	315	hcd->rsrc_len = resource_size(res);
60bbfc84 VW	316
	317	irq = platform_get_irq(pdev, 0);
	318	if (irq < 0) {
	319	ret = -ENXIO;
78091dc2	320	goto out8;
60bbfc84 VW	321	}
60bbfc84 VW	322
28643104	323	nxp_start_hc();
60bbfc84 VW	324	platform_set_drvdata(pdev, hcd);
	325	ohci = hcd_to_ohci(hcd);
	326	ohci_hcd_init(ohci);
	327
	328	dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
b5dd18d8	329	ret = usb_add_hcd(hcd, irq, 0);
60bbfc84 VW	330	if (ret == 0)
	331	return ret;
	332
28643104	333	nxp_stop_hc();
78091dc2	334	out8:
60bbfc84	335	usb_put_hcd(hcd);
78091dc2 APS	336	out7:
	337	clk_disable(usb_otg_clk);
	338	out6:
	339	clk_put(usb_otg_clk);
	340	out5:
	341	clk_disable(usb_dev_clk);
	342	out4:
	343	clk_put(usb_dev_clk);
60bbfc84	344	out3:
78091dc2	345	clk_disable(usb_pll_clk);
60bbfc84	346	out2:
78091dc2	347	clk_put(usb_pll_clk);
60bbfc84	348	out1:
3a407e73	349	isp1301_i2c_client = NULL;
60bbfc84 VW	350	out:
	351	return ret;
	352	}
	353
28643104	354	static int usb_hcd_nxp_remove(struct platform_device *pdev)
60bbfc84 VW	355	{
	356	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	357
	358	usb_remove_hcd(hcd);
28643104	359	nxp_stop_hc();
60bbfc84 VW	360	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
60bbfc84 VW	361	usb_put_hcd(hcd);
78091dc2 APS	362	clk_disable(usb_pll_clk);
	363	clk_put(usb_pll_clk);
	364	clk_disable(usb_dev_clk);
	365	clk_put(usb_dev_clk);
8740cc7d	366	i2c_unregister_device(isp1301_i2c_client);
3a407e73	367	isp1301_i2c_client = NULL;
60bbfc84 VW	368
	369	platform_set_drvdata(pdev, NULL);
	370
	371	return 0;
	372	}
	373
f4fce61d KS	374	/* work with hotplug and coldplug */
	375	MODULE_ALIAS("platform:usb-ohci");
	376
2265efea RS	377	#ifdef CONFIG_OF
	378	static const struct of_device_id usb_hcd_nxp_match[] = {
	379	{ .compatible = "nxp,ohci-nxp" },
	380	{},
	381	};
	382	MODULE_DEVICE_TABLE(of, usb_hcd_nxp_match);
	383	#endif
	384
28643104	385	static struct platform_driver usb_hcd_nxp_driver = {
60bbfc84 VW	386	.driver = {
60bbfc84 VW	387	.name = "usb-ohci",
f4fce61d	388	.owner = THIS_MODULE,
2265efea	389	.of_match_table = of_match_ptr(usb_hcd_nxp_match),
60bbfc84	390	},
28643104 RS	391	.probe = usb_hcd_nxp_probe,
28643104 RS	392	.remove = usb_hcd_nxp_remove,
60bbfc84 VW	393	};
60bbfc84 VW	394