[deliverable/linux.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/platform_device.h>
#include <mach/regs-pmu.h>
#include <plat/cpu.h>
#include <plat/ehci.h>
#include <plat/usb-phy.h>

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_init,
	.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 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;
	}

	s5p_ehci = kzalloc(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");
		err = -ENOMEM;
		goto fail_hcd;
	}

	s5p_ehci->clk = 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_clken;

	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 = ioremap(res->start, resource_size(res));
	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;
	}

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

	ehci = hcd_to_ehci(hcd);
	ehci->caps = hcd->regs;
	ehci->regs = hcd->regs +
		HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase));

	dbg_hcs_params(ehci, "reset");
	dbg_hcc_params(ehci, "reset");

	/* cache this readonly data; minimize chip reads */
	ehci->hcs_params = readl(&ehci->caps->hcs_params);

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

	platform_set_drvdata(pdev, s5p_ehci);

	return 0;

fail:
	iounmap(hcd->regs);
fail_io:
	clk_disable(s5p_ehci->clk);
fail_clken:
	clk_put(s5p_ehci->clk);
fail_clk:
	usb_put_hcd(hcd);
fail_hcd:
	kfree(s5p_ehci);
	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);

	iounmap(hcd->regs);

	clk_disable(s5p_ehci->clk);
	clk_put(s5p_ehci->clk);

	usb_put_hcd(hcd);
	kfree(s5p_ehci);

	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);
}

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,
	}
};

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>
	16	#include <linux/platform_device.h>
	17	#include <mach/regs-pmu.h>
	18	#include <plat/cpu.h>
	19	#include <plat/ehci.h>
	20	#include <plat/usb-phy.h>
	21
	22	struct s5p_ehci_hcd {
	23	struct device *dev;
	24	struct usb_hcd *hcd;
	25	struct clk *clk;
	26	};
	27
	28	static const struct hc_driver s5p_ehci_hc_driver = {
	29	.description = hcd_name,
	30	.product_desc = "S5P EHCI Host Controller",
	31	.hcd_priv_size = sizeof(struct ehci_hcd),
	32
	33	.irq = ehci_irq,
	34	.flags = HCD_MEMORY \| HCD_USB2,
	35
	36	.reset = ehci_init,
	37	.start = ehci_run,
	38	.stop = ehci_stop,
	39	.shutdown = ehci_shutdown,
	40
	41	.get_frame_number = ehci_get_frame,
	42
	43	.urb_enqueue = ehci_urb_enqueue,
	44	.urb_dequeue = ehci_urb_dequeue,
	45	.endpoint_disable = ehci_endpoint_disable,
	46	.endpoint_reset = ehci_endpoint_reset,
	47
	48	.hub_status_data = ehci_hub_status_data,
	49	.hub_control = ehci_hub_control,
	50	.bus_suspend = ehci_bus_suspend,
	51	.bus_resume = ehci_bus_resume,
	52
	53	.relinquish_port = ehci_relinquish_port,
	54	.port_handed_over = ehci_port_handed_over,
	55
	56	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
	57	};
	58
27362d46	59	static int __devinit s5p_ehci_probe(struct platform_device *pdev)
1bcc5aa8 JS	60	{
	61	struct s5p_ehci_platdata *pdata;
	62	struct s5p_ehci_hcd *s5p_ehci;
	63	struct usb_hcd *hcd;
	64	struct ehci_hcd *ehci;
	65	struct resource *res;
	66	int irq;
	67	int err;
	68
	69	pdata = pdev->dev.platform_data;
	70	if (!pdata) {
	71	dev_err(&pdev->dev, "No platform data defined\n");
	72	return -EINVAL;
	73	}
	74
	75	s5p_ehci = kzalloc(sizeof(struct s5p_ehci_hcd), GFP_KERNEL);
	76	if (!s5p_ehci)
	77	return -ENOMEM;
	78
	79	s5p_ehci->dev = &pdev->dev;
	80
	81	hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
	82	dev_name(&pdev->dev));
	83	if (!hcd) {
	84	dev_err(&pdev->dev, "Unable to create HCD\n");
	85	err = -ENOMEM;
	86	goto fail_hcd;
	87	}
	88
	89	s5p_ehci->clk = clk_get(&pdev->dev, "usbhost");
	90
	91	if (IS_ERR(s5p_ehci->clk)) {
	92	dev_err(&pdev->dev, "Failed to get usbhost clock\n");
	93	err = PTR_ERR(s5p_ehci->clk);
	94	goto fail_clk;
	95	}
	96
	97	err = clk_enable(s5p_ehci->clk);
	98	if (err)
	99	goto fail_clken;
	100
	101	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	102	if (!res) {
	103	dev_err(&pdev->dev, "Failed to get I/O memory\n");
	104	err = -ENXIO;
	105	goto fail_io;
	106	}
	107
	108	hcd->rsrc_start = res->start;
	109	hcd->rsrc_len = resource_size(res);
	110	hcd->regs = ioremap(res->start, resource_size(res));
	111	if (!hcd->regs) {
	112	dev_err(&pdev->dev, "Failed to remap I/O memory\n");
	113	err = -ENOMEM;
	114	goto fail_io;
	115	}
	116
	117	irq = platform_get_irq(pdev, 0);
	118	if (!irq) {
	119	dev_err(&pdev->dev, "Failed to get IRQ\n");
	120	err = -ENODEV;
	121	goto fail;
	122	}
	123
124	if (pdata->phy_init)
125	pdata->phy_init(pdev, S5P_USB_PHY_HOST);
126
127	ehci = hcd_to_ehci(hcd);
128	ehci->caps = hcd->regs;
c430131a JA	129	ehci->regs = hcd->regs +
c430131a JA	130	HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase));
1bcc5aa8 JS	131
	132	dbg_hcs_params(ehci, "reset");
	133	dbg_hcc_params(ehci, "reset");
	134
	135	/* cache this readonly data; minimize chip reads */
	136	ehci->hcs_params = readl(&ehci->caps->hcs_params);
	137
	138	err = usb_add_hcd(hcd, irq, IRQF_DISABLED \| IRQF_SHARED);
	139	if (err) {
	140	dev_err(&pdev->dev, "Failed to add USB HCD\n");
	141	goto fail;
	142	}
	143
	144	platform_set_drvdata(pdev, s5p_ehci);
	145
	146	return 0;
	147
	148	fail:
	149	iounmap(hcd->regs);
	150	fail_io:
	151	clk_disable(s5p_ehci->clk);
	152	fail_clken:
	153	clk_put(s5p_ehci->clk);
	154	fail_clk:
	155	usb_put_hcd(hcd);
	156	fail_hcd:
	157	kfree(s5p_ehci);
	158	return err;
	159	}
	160
27362d46	161	static int __devexit s5p_ehci_remove(struct platform_device *pdev)
1bcc5aa8 JS	162	{
	163	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
	164	struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
	165	struct usb_hcd *hcd = s5p_ehci->hcd;
	166
	167	usb_remove_hcd(hcd);
	168
	169	if (pdata && pdata->phy_exit)
	170	pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
	171
	172	iounmap(hcd->regs);
	173
	174	clk_disable(s5p_ehci->clk);
	175	clk_put(s5p_ehci->clk);
	176
	177	usb_put_hcd(hcd);
	178	kfree(s5p_ehci);
	179
	180	return 0;
	181	}
	182
	183	static void s5p_ehci_shutdown(struct platform_device *pdev)
	184	{
	185	struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
	186	struct usb_hcd *hcd = s5p_ehci->hcd;
	187
	188	if (hcd->driver->shutdown)
	189	hcd->driver->shutdown(hcd);
	190	}
	191
	192	static struct platform_driver s5p_ehci_driver = {
	193	.probe = s5p_ehci_probe,
27362d46	194	.remove = __devexit_p(s5p_ehci_remove),
1bcc5aa8 JS	195	.shutdown = s5p_ehci_shutdown,
	196	.driver = {
	197	.name = "s5p-ehci",
	198	.owner = THIS_MODULE,
	199	}
	200	};
	201
	202	MODULE_ALIAS("platform:s5p-ehci");