[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / host / ehci-s5p.c

/*
 * SAMSUNG S5P USB HOST EHCI Controller
 *
 * Copyright (C) 2011 Samsung Electronics Co.Ltd
 * Author: Jingoo Han <jg1.han@samsung.com>
 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 */

#include <linux/clk.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/of_gpio.h>
#include <plat/ehci.h>
#include <plat/usb-phy.h>

#define EHCI_INSNREG00(base)			(base + 0x90)
#define EHCI_INSNREG00_ENA_INCR16		(0x1 << 25)
#define EHCI_INSNREG00_ENA_INCR8		(0x1 << 24)
#define EHCI_INSNREG00_ENA_INCR4		(0x1 << 23)
#define EHCI_INSNREG00_ENA_INCRX_ALIGN		(0x1 << 22)
#define EHCI_INSNREG00_ENABLE_DMA_BURST	\
	(EHCI_INSNREG00_ENA_INCR16 | EHCI_INSNREG00_ENA_INCR8 |	\
	 EHCI_INSNREG00_ENA_INCR4 | EHCI_INSNREG00_ENA_INCRX_ALIGN)

struct s5p_ehci_hcd {
	struct device *dev;
	struct usb_hcd *hcd;
	struct clk *clk;
};

static const struct hc_driver s5p_ehci_hc_driver = {
	.description		= hcd_name,
	.product_desc		= "S5P EHCI Host Controller",
	.hcd_priv_size		= sizeof(struct ehci_hcd),

	.irq			= ehci_irq,
	.flags			= HCD_MEMORY | HCD_USB2,

	.reset			= ehci_setup,
	.start			= ehci_run,
	.stop			= ehci_stop,
	.shutdown		= ehci_shutdown,

	.get_frame_number	= ehci_get_frame,

	.urb_enqueue		= ehci_urb_enqueue,
	.urb_dequeue		= ehci_urb_dequeue,
	.endpoint_disable	= ehci_endpoint_disable,
	.endpoint_reset		= ehci_endpoint_reset,

	.hub_status_data	= ehci_hub_status_data,
	.hub_control		= ehci_hub_control,
	.bus_suspend		= ehci_bus_suspend,
	.bus_resume		= ehci_bus_resume,

	.relinquish_port	= ehci_relinquish_port,
	.port_handed_over	= ehci_port_handed_over,

	.clear_tt_buffer_complete	= ehci_clear_tt_buffer_complete,
};

static void s5p_setup_vbus_gpio(struct platform_device *pdev)
{
	int err;
	int gpio;

	if (!pdev->dev.of_node)
		return;

	gpio = of_get_named_gpio(pdev->dev.of_node,
			"samsung,vbus-gpio", 0);
	if (!gpio_is_valid(gpio))
		return;

	err = gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH, "ehci_vbus_gpio");
	if (err)
		dev_err(&pdev->dev, "can't request ehci vbus gpio %d", gpio);
}

static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32);

static int __devinit s5p_ehci_probe(struct platform_device *pdev)
{
	struct s5p_ehci_platdata *pdata;
	struct s5p_ehci_hcd *s5p_ehci;
	struct usb_hcd *hcd;
	struct ehci_hcd *ehci;
	struct resource *res;
	int irq;
	int err;

	pdata = pdev->dev.platform_data;
	if (!pdata) {
		dev_err(&pdev->dev, "No platform data defined\n");
		return -EINVAL;
	}

	/*
	 * Right now device-tree probed devices don't get dma_mask set.
	 * Since shared usb code relies on it, set it here for now.
	 * Once we move to full device tree support this will vanish off.
	 */
	if (!pdev->dev.dma_mask)
		pdev->dev.dma_mask = &ehci_s5p_dma_mask;
	if (!pdev->dev.coherent_dma_mask)
		pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);

	s5p_setup_vbus_gpio(pdev);

	s5p_ehci = devm_kzalloc(&pdev->dev, sizeof(struct s5p_ehci_hcd),
				GFP_KERNEL);
	if (!s5p_ehci)
		return -ENOMEM;

	s5p_ehci->dev = &pdev->dev;

	hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
					dev_name(&pdev->dev));
	if (!hcd) {
		dev_err(&pdev->dev, "Unable to create HCD\n");
		return -ENOMEM;
	}

	s5p_ehci->hcd = hcd;
	s5p_ehci->clk = devm_clk_get(&pdev->dev, "usbhost");

	if (IS_ERR(s5p_ehci->clk)) {
		dev_err(&pdev->dev, "Failed to get usbhost clock\n");
		err = PTR_ERR(s5p_ehci->clk);
		goto fail_clk;
	}

	err = clk_enable(s5p_ehci->clk);
	if (err)
		goto fail_clk;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(&pdev->dev, "Failed to get I/O memory\n");
		err = -ENXIO;
		goto fail_io;
	}

	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);
	hcd->regs = devm_ioremap(&pdev->dev, res->start, hcd->rsrc_len);
	if (!hcd->regs) {
		dev_err(&pdev->dev, "Failed to remap I/O memory\n");
		err = -ENOMEM;
		goto fail_io;
	}

	irq = platform_get_irq(pdev, 0);
	if (!irq) {
		dev_err(&pdev->dev, "Failed to get IRQ\n");
		err = -ENODEV;
		goto fail_io;
	}

	if (pdata->phy_init)
		pdata->phy_init(pdev, S5P_USB_PHY_HOST);

	ehci = hcd_to_ehci(hcd);
	ehci->caps = hcd->regs;

	/* DMA burst Enable */
	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));

	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (err) {
		dev_err(&pdev->dev, "Failed to add USB HCD\n");
		goto fail_io;
	}

	platform_set_drvdata(pdev, s5p_ehci);

	return 0;

fail_io:
	clk_disable(s5p_ehci->clk);
fail_clk:
	usb_put_hcd(hcd);
	return err;
}

static int __devexit s5p_ehci_remove(struct platform_device *pdev)
{
	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
	struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
	struct usb_hcd *hcd = s5p_ehci->hcd;

	usb_remove_hcd(hcd);

	if (pdata && pdata->phy_exit)
		pdata->phy_exit(pdev, S5P_USB_PHY_HOST);

	clk_disable(s5p_ehci->clk);

	usb_put_hcd(hcd);

	return 0;
}

static void s5p_ehci_shutdown(struct platform_device *pdev)
{
	struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
	struct usb_hcd *hcd = s5p_ehci->hcd;

	if (hcd->driver->shutdown)
		hcd->driver->shutdown(hcd);
}

#ifdef CONFIG_PM
static int s5p_ehci_suspend(struct device *dev)
{
	struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
	struct usb_hcd *hcd = s5p_ehci->hcd;
	bool do_wakeup = device_may_wakeup(dev);
	struct platform_device *pdev = to_platform_device(dev);
	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
	int rc;

	rc = ehci_suspend(hcd, do_wakeup);

	if (pdata && pdata->phy_exit)
		pdata->phy_exit(pdev, S5P_USB_PHY_HOST);

	clk_disable(s5p_ehci->clk);

	return rc;
}

static int s5p_ehci_resume(struct device *dev)
{
	struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
	struct usb_hcd *hcd = s5p_ehci->hcd;
	struct platform_device *pdev = to_platform_device(dev);
	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;

	clk_enable(s5p_ehci->clk);

	if (pdata && pdata->phy_init)
		pdata->phy_init(pdev, S5P_USB_PHY_HOST);

	/* DMA burst Enable */
	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));

	ehci_resume(hcd, false);
	return 0;
}
#else
#define s5p_ehci_suspend	NULL
#define s5p_ehci_resume		NULL
#endif

static const struct dev_pm_ops s5p_ehci_pm_ops = {
	.suspend	= s5p_ehci_suspend,
	.resume		= s5p_ehci_resume,
};

#ifdef CONFIG_OF
static const struct of_device_id exynos_ehci_match[] = {
	{ .compatible = "samsung,exynos-ehci" },
	{},
};
MODULE_DEVICE_TABLE(of, exynos_ehci_match);
#endif

static struct platform_driver s5p_ehci_driver = {
	.probe		= s5p_ehci_probe,
	.remove		= __devexit_p(s5p_ehci_remove),
	.shutdown	= s5p_ehci_shutdown,
	.driver = {
		.name	= "s5p-ehci",
		.owner	= THIS_MODULE,
		.pm	= &s5p_ehci_pm_ops,
		.of_match_table = of_match_ptr(exynos_ehci_match),
	}
};

MODULE_ALIAS("platform:s5p-ehci");
Commit	Line	Data
1bcc5aa8 JS	1	/*
	2	* SAMSUNG S5P USB HOST EHCI Controller
	3	*
	4	* Copyright (C) 2011 Samsung Electronics Co.Ltd
	5	* Author: Jingoo Han <jg1.han@samsung.com>
	6	* Author: Joonyoung Shim <jy0922.shim@samsung.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*
	13	*/
	14
	15	#include <linux/clk.h>
2c026e2b	16	#include <linux/of.h>
1bcc5aa8	17	#include <linux/platform_device.h>
fd81d59c	18	#include <linux/of_gpio.h>
1bcc5aa8 JS	19	#include <plat/ehci.h>
	20	#include <plat/usb-phy.h>
	21
88555a63 JH	22	#define EHCI_INSNREG00(base) (base + 0x90)
	23	#define EHCI_INSNREG00_ENA_INCR16 (0x1 << 25)
	24	#define EHCI_INSNREG00_ENA_INCR8 (0x1 << 24)
	25	#define EHCI_INSNREG00_ENA_INCR4 (0x1 << 23)
	26	#define EHCI_INSNREG00_ENA_INCRX_ALIGN (0x1 << 22)
	27	#define EHCI_INSNREG00_ENABLE_DMA_BURST \
	28	(EHCI_INSNREG00_ENA_INCR16 \| EHCI_INSNREG00_ENA_INCR8 \| \
	29	EHCI_INSNREG00_ENA_INCR4 \| EHCI_INSNREG00_ENA_INCRX_ALIGN)
	30
1bcc5aa8 JS	31	struct s5p_ehci_hcd {
	32	struct device *dev;
	33	struct usb_hcd *hcd;
	34	struct clk *clk;
	35	};
	36
	37	static const struct hc_driver s5p_ehci_hc_driver = {
	38	.description = hcd_name,
	39	.product_desc = "S5P EHCI Host Controller",
	40	.hcd_priv_size = sizeof(struct ehci_hcd),
	41
	42	.irq = ehci_irq,
	43	.flags = HCD_MEMORY \| HCD_USB2,
	44
1a49e2ac	45	.reset = ehci_setup,
1bcc5aa8 JS	46	.start = ehci_run,
	47	.stop = ehci_stop,
	48	.shutdown = ehci_shutdown,
	49
	50	.get_frame_number = ehci_get_frame,
	51
	52	.urb_enqueue = ehci_urb_enqueue,
	53	.urb_dequeue = ehci_urb_dequeue,
	54	.endpoint_disable = ehci_endpoint_disable,
	55	.endpoint_reset = ehci_endpoint_reset,
	56
	57	.hub_status_data = ehci_hub_status_data,
	58	.hub_control = ehci_hub_control,
	59	.bus_suspend = ehci_bus_suspend,
	60	.bus_resume = ehci_bus_resume,
	61
	62	.relinquish_port = ehci_relinquish_port,
	63	.port_handed_over = ehci_port_handed_over,
	64
	65	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
	66	};
	67
fd81d59c VG	68	static void s5p_setup_vbus_gpio(struct platform_device *pdev)
	69	{
	70	int err;
	71	int gpio;
	72
	73	if (!pdev->dev.of_node)
	74	return;
	75
	76	gpio = of_get_named_gpio(pdev->dev.of_node,
	77	"samsung,vbus-gpio", 0);
	78	if (!gpio_is_valid(gpio))
	79	return;
	80
	81	err = gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH, "ehci_vbus_gpio");
	82	if (err)
	83	dev_err(&pdev->dev, "can't request ehci vbus gpio %d", gpio);
	84	}
	85
2c026e2b VG	86	static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32);
2c026e2b VG	87
27362d46	88	static int __devinit s5p_ehci_probe(struct platform_device *pdev)
1bcc5aa8 JS	89	{
	90	struct s5p_ehci_platdata *pdata;
	91	struct s5p_ehci_hcd *s5p_ehci;
	92	struct usb_hcd *hcd;
	93	struct ehci_hcd *ehci;
	94	struct resource *res;
	95	int irq;
	96	int err;
	97
	98	pdata = pdev->dev.platform_data;
	99	if (!pdata) {
	100	dev_err(&pdev->dev, "No platform data defined\n");
	101	return -EINVAL;
	102	}
	103
2c026e2b VG	104	/*
	105	* Right now device-tree probed devices don't get dma_mask set.
	106	* Since shared usb code relies on it, set it here for now.
	107	* Once we move to full device tree support this will vanish off.
	108	*/
	109	if (!pdev->dev.dma_mask)
	110	pdev->dev.dma_mask = &ehci_s5p_dma_mask;
	111	if (!pdev->dev.coherent_dma_mask)
	112	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
	113
fd81d59c VG	114	s5p_setup_vbus_gpio(pdev);
fd81d59c VG	115
9cb07563 JH	116	s5p_ehci = devm_kzalloc(&pdev->dev, sizeof(struct s5p_ehci_hcd),
9cb07563 JH	117	GFP_KERNEL);
1bcc5aa8 JS	118	if (!s5p_ehci)
	119	return -ENOMEM;
	120
	121	s5p_ehci->dev = &pdev->dev;
	122
	123	hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
	124	dev_name(&pdev->dev));
	125	if (!hcd) {
	126	dev_err(&pdev->dev, "Unable to create HCD\n");
9cb07563	127	return -ENOMEM;
1bcc5aa8 JS	128	}
1bcc5aa8 JS	129
e5d3d446	130	s5p_ehci->hcd = hcd;
63fd0ae4	131	s5p_ehci->clk = devm_clk_get(&pdev->dev, "usbhost");
1bcc5aa8 JS	132
	133	if (IS_ERR(s5p_ehci->clk)) {
	134	dev_err(&pdev->dev, "Failed to get usbhost clock\n");
	135	err = PTR_ERR(s5p_ehci->clk);
	136	goto fail_clk;
	137	}
	138
	139	err = clk_enable(s5p_ehci->clk);
	140	if (err)
63fd0ae4	141	goto fail_clk;
1bcc5aa8 JS	142
	143	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	144	if (!res) {
	145	dev_err(&pdev->dev, "Failed to get I/O memory\n");
	146	err = -ENXIO;
	147	goto fail_io;
	148	}
	149
	150	hcd->rsrc_start = res->start;
	151	hcd->rsrc_len = resource_size(res);
9cb07563	152	hcd->regs = devm_ioremap(&pdev->dev, res->start, hcd->rsrc_len);
1bcc5aa8 JS	153	if (!hcd->regs) {
	154	dev_err(&pdev->dev, "Failed to remap I/O memory\n");
	155	err = -ENOMEM;
	156	goto fail_io;
	157	}
	158
	159	irq = platform_get_irq(pdev, 0);
	160	if (!irq) {
	161	dev_err(&pdev->dev, "Failed to get IRQ\n");
	162	err = -ENODEV;
9cb07563	163	goto fail_io;
1bcc5aa8 JS	164	}
	165
	166	if (pdata->phy_init)
	167	pdata->phy_init(pdev, S5P_USB_PHY_HOST);
	168
	169	ehci = hcd_to_ehci(hcd);
	170	ehci->caps = hcd->regs;
1bcc5aa8	171
88555a63 JH	172	/* DMA burst Enable */
	173	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));
	174
b5dd18d8	175	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
1bcc5aa8 JS	176	if (err) {
1bcc5aa8 JS	177	dev_err(&pdev->dev, "Failed to add USB HCD\n");
9cb07563	178	goto fail_io;
1bcc5aa8 JS	179	}
	180
	181	platform_set_drvdata(pdev, s5p_ehci);
	182
	183	return 0;
	184
1bcc5aa8 JS	185	fail_io:
1bcc5aa8 JS	186	clk_disable(s5p_ehci->clk);
1bcc5aa8 JS	187	fail_clk:
1bcc5aa8 JS	188	usb_put_hcd(hcd);
1bcc5aa8 JS	189	return err;
	190	}
	191
27362d46	192	static int __devexit s5p_ehci_remove(struct platform_device *pdev)
1bcc5aa8 JS	193	{
	194	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
	195	struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
	196	struct usb_hcd *hcd = s5p_ehci->hcd;
	197
	198	usb_remove_hcd(hcd);
	199
	200	if (pdata && pdata->phy_exit)
	201	pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
	202
1bcc5aa8	203	clk_disable(s5p_ehci->clk);
1bcc5aa8 JS	204
1bcc5aa8 JS	205	usb_put_hcd(hcd);
1bcc5aa8 JS	206
	207	return 0;
	208	}
	209
	210	static void s5p_ehci_shutdown(struct platform_device *pdev)
	211	{
	212	struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
	213	struct usb_hcd *hcd = s5p_ehci->hcd;
	214
	215	if (hcd->driver->shutdown)
	216	hcd->driver->shutdown(hcd);
	217	}
	218
1acb30ef JH	219	#ifdef CONFIG_PM
	220	static int s5p_ehci_suspend(struct device *dev)
	221	{
	222	struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
	223	struct usb_hcd *hcd = s5p_ehci->hcd;
c5cf9212	224	bool do_wakeup = device_may_wakeup(dev);
1acb30ef JH	225	struct platform_device *pdev = to_platform_device(dev);
1acb30ef JH	226	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
c5cf9212	227	int rc;
1acb30ef	228
c5cf9212	229	rc = ehci_suspend(hcd, do_wakeup);
1acb30ef JH	230
	231	if (pdata && pdata->phy_exit)
	232	pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
	233
8b4fc8c7 JH	234	clk_disable(s5p_ehci->clk);
8b4fc8c7 JH	235
1acb30ef JH	236	return rc;
	237	}
	238
	239	static int s5p_ehci_resume(struct device *dev)
	240	{
	241	struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
	242	struct usb_hcd *hcd = s5p_ehci->hcd;
1acb30ef JH	243	struct platform_device *pdev = to_platform_device(dev);
	244	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
	245
8b4fc8c7 JH	246	clk_enable(s5p_ehci->clk);
8b4fc8c7 JH	247
1acb30ef JH	248	if (pdata && pdata->phy_init)
	249	pdata->phy_init(pdev, S5P_USB_PHY_HOST);
	250
88555a63 JH	251	/* DMA burst Enable */
	252	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));
	253
c5cf9212	254	ehci_resume(hcd, false);
1acb30ef JH	255	return 0;
	256	}
	257	#else
	258	#define s5p_ehci_suspend NULL
	259	#define s5p_ehci_resume NULL
	260	#endif
	261
	262	static const struct dev_pm_ops s5p_ehci_pm_ops = {
	263	.suspend = s5p_ehci_suspend,
	264	.resume = s5p_ehci_resume,
	265	};
	266
2c026e2b VG	267	#ifdef CONFIG_OF
	268	static const struct of_device_id exynos_ehci_match[] = {
	269	{ .compatible = "samsung,exynos-ehci" },
	270	{},
	271	};
	272	MODULE_DEVICE_TABLE(of, exynos_ehci_match);
	273	#endif
	274
1bcc5aa8 JS	275	static struct platform_driver s5p_ehci_driver = {
1bcc5aa8 JS	276	.probe = s5p_ehci_probe,
27362d46	277	.remove = __devexit_p(s5p_ehci_remove),
1bcc5aa8 JS	278	.shutdown = s5p_ehci_shutdown,
	279	.driver = {
	280	.name = "s5p-ehci",
	281	.owner = THIS_MODULE,
1acb30ef	282	.pm = &s5p_ehci_pm_ops,
2c026e2b	283	.of_match_table = of_match_ptr(exynos_ehci_match),
1bcc5aa8 JS	284	}
	285	};
	286
	287	MODULE_ALIAS("platform:s5p-ehci");