[deliverable/linux.git] / drivers / usb / host / ehci-sh.c

/*
 * SuperH EHCI host controller driver
 *
 * Copyright (C) 2010  Paul Mundt
 *
 * Based on ohci-sh.c and ehci-atmel.c.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/platform_data/ehci-sh.h>

struct ehci_sh_priv {
	struct clk *iclk, *fclk;
	struct usb_hcd *hcd;
};

static int ehci_sh_reset(struct usb_hcd *hcd)
{
	struct ehci_hcd	*ehci = hcd_to_ehci(hcd);

	ehci->caps = hcd->regs;

	return ehci_setup(hcd);
}

static const struct hc_driver ehci_sh_hc_driver = {
	.description			= hcd_name,
	.product_desc			= "SuperH EHCI",
	.hcd_priv_size			= sizeof(struct ehci_hcd),

	/*
	 * generic hardware linkage
	 */
	.irq				= ehci_irq,
	.flags				= HCD_USB2 | HCD_MEMORY,

	/*
	 * basic lifecycle operations
	 */
	.reset				= ehci_sh_reset,
	.start				= ehci_run,
	.stop				= ehci_stop,
	.shutdown			= ehci_shutdown,

	/*
	 * managing i/o requests and associated device resources
	 */
	.urb_enqueue			= ehci_urb_enqueue,
	.urb_dequeue			= ehci_urb_dequeue,
	.endpoint_disable		= ehci_endpoint_disable,
	.endpoint_reset			= ehci_endpoint_reset,

	/*
	 * scheduling support
	 */
	.get_frame_number		= ehci_get_frame,

	/*
	 * root hub support
	 */
	.hub_status_data		= ehci_hub_status_data,
	.hub_control			= ehci_hub_control,

#ifdef CONFIG_PM
	.bus_suspend			= ehci_bus_suspend,
	.bus_resume			= ehci_bus_resume,
#endif

	.relinquish_port		= ehci_relinquish_port,
	.port_handed_over		= ehci_port_handed_over,
	.clear_tt_buffer_complete	= ehci_clear_tt_buffer_complete,
};

static int ehci_hcd_sh_probe(struct platform_device *pdev)
{
	const struct hc_driver *driver = &ehci_sh_hc_driver;
	struct resource *res;
	struct ehci_sh_priv *priv;
	struct ehci_sh_platdata *pdata;
	struct usb_hcd *hcd;
	int irq, ret;

	if (usb_disabled())
		return -ENODEV;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(&pdev->dev,
			"Found HC with no register addr. Check %s setup!\n",
			dev_name(&pdev->dev));
		ret = -ENODEV;
		goto fail_create_hcd;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq <= 0) {
		dev_err(&pdev->dev,
			"Found HC with no IRQ. Check %s setup!\n",
			dev_name(&pdev->dev));
		ret = -ENODEV;
		goto fail_create_hcd;
	}

	pdata = pdev->dev.platform_data;

	/* initialize hcd */
	hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
			     dev_name(&pdev->dev));
	if (!hcd) {
		ret = -ENOMEM;
		goto fail_create_hcd;
	}

	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);

	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(hcd->regs)) {
		ret = PTR_ERR(hcd->regs);
		goto fail_request_resource;
	}

	priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
			    GFP_KERNEL);
	if (!priv) {
		dev_dbg(&pdev->dev, "error allocating priv data\n");
		ret = -ENOMEM;
		goto fail_request_resource;
	}

	/* These are optional, we don't care if they fail */
	priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
	if (IS_ERR(priv->fclk))
		priv->fclk = NULL;

	priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
	if (IS_ERR(priv->iclk))
		priv->iclk = NULL;

	clk_enable(priv->fclk);
	clk_enable(priv->iclk);

	if (pdata && pdata->phy_init)
		pdata->phy_init();

	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to add hcd");
		goto fail_add_hcd;
	}

	priv->hcd = hcd;
	platform_set_drvdata(pdev, priv);

	return ret;

fail_add_hcd:
	clk_disable(priv->iclk);
	clk_disable(priv->fclk);

fail_request_resource:
	usb_put_hcd(hcd);
fail_create_hcd:
	dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);

	return ret;
}

static int __exit ehci_hcd_sh_remove(struct platform_device *pdev)
{
	struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
	struct usb_hcd *hcd = priv->hcd;

	usb_remove_hcd(hcd);
	usb_put_hcd(hcd);
	platform_set_drvdata(pdev, NULL);

	clk_disable(priv->fclk);
	clk_disable(priv->iclk);

	return 0;
}

static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
{
	struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
	struct usb_hcd *hcd = priv->hcd;

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

static struct platform_driver ehci_hcd_sh_driver = {
	.probe		= ehci_hcd_sh_probe,
	.remove		= __exit_p(ehci_hcd_sh_remove),
	.shutdown	= ehci_hcd_sh_shutdown,
	.driver		= {
		.name	= "sh_ehci",
		.owner	= THIS_MODULE,
	},
};

MODULE_ALIAS("platform:sh_ehci");
Commit	Line	Data
63c84552 PM	1	/*
	2	* SuperH EHCI host controller driver
	3	*
	4	* Copyright (C) 2010 Paul Mundt
	5	*
	6	* Based on ohci-sh.c and ehci-atmel.c.
	7	*
	8	* This file is subject to the terms and conditions of the GNU General Public
	9	* License. See the file "COPYING" in the main directory of this archive
	10	* for more details.
	11	*/
	12	#include <linux/platform_device.h>
	13	#include <linux/clk.h>
3e0c70d0	14	#include <linux/platform_data/ehci-sh.h>
63c84552 PM	15
	16	struct ehci_sh_priv {
	17	struct clk iclk, fclk;
	18	struct usb_hcd *hcd;
	19	};
	20
	21	static int ehci_sh_reset(struct usb_hcd *hcd)
	22	{
	23	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
63c84552 PM	24
63c84552 PM	25	ehci->caps = hcd->regs;
63c84552	26
c73cee71	27	return ehci_setup(hcd);
63c84552 PM	28	}
	29
	30	static const struct hc_driver ehci_sh_hc_driver = {
	31	.description = hcd_name,
	32	.product_desc = "SuperH EHCI",
	33	.hcd_priv_size = sizeof(struct ehci_hcd),
	34
	35	/*
	36	* generic hardware linkage
	37	*/
	38	.irq = ehci_irq,
	39	.flags = HCD_USB2 \| HCD_MEMORY,
	40
	41	/*
	42	* basic lifecycle operations
	43	*/
	44	.reset = ehci_sh_reset,
	45	.start = ehci_run,
	46	.stop = ehci_stop,
	47	.shutdown = ehci_shutdown,
	48
	49	/*
	50	* managing i/o requests and associated device resources
	51	*/
	52	.urb_enqueue = ehci_urb_enqueue,
	53	.urb_dequeue = ehci_urb_dequeue,
	54	.endpoint_disable = ehci_endpoint_disable,
6e9d4476	55	.endpoint_reset = ehci_endpoint_reset,
63c84552 PM	56
	57	/*
	58	* scheduling support
	59	*/
	60	.get_frame_number = ehci_get_frame,
	61
	62	/*
	63	* root hub support
	64	*/
	65	.hub_status_data = ehci_hub_status_data,
	66	.hub_control = ehci_hub_control,
	67
	68	#ifdef CONFIG_PM
	69	.bus_suspend = ehci_bus_suspend,
	70	.bus_resume = ehci_bus_resume,
	71	#endif
	72
	73	.relinquish_port = ehci_relinquish_port,
	74	.port_handed_over = ehci_port_handed_over,
6e9d4476	75	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
63c84552 PM	76	};
	77
	78	static int ehci_hcd_sh_probe(struct platform_device *pdev)
	79	{
	80	const struct hc_driver *driver = &ehci_sh_hc_driver;
	81	struct resource *res;
	82	struct ehci_sh_priv *priv;
3e0c70d0	83	struct ehci_sh_platdata *pdata;
63c84552 PM	84	struct usb_hcd *hcd;
	85	int irq, ret;
	86
	87	if (usb_disabled())
	88	return -ENODEV;
	89
	90	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	91	if (!res) {
	92	dev_err(&pdev->dev,
	93	"Found HC with no register addr. Check %s setup!\n",
	94	dev_name(&pdev->dev));
	95	ret = -ENODEV;
	96	goto fail_create_hcd;
	97	}
	98
	99	irq = platform_get_irq(pdev, 0);
	100	if (irq <= 0) {
	101	dev_err(&pdev->dev,
	102	"Found HC with no IRQ. Check %s setup!\n",
	103	dev_name(&pdev->dev));
	104	ret = -ENODEV;
	105	goto fail_create_hcd;
	106	}
	107
5897b038	108	pdata = pdev->dev.platform_data;
3e0c70d0	109
63c84552 PM	110	/* initialize hcd */
	111	hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
	112	dev_name(&pdev->dev));
	113	if (!hcd) {
	114	ret = -ENOMEM;
	115	goto fail_create_hcd;
	116	}
	117
	118	hcd->rsrc_start = res->start;
	119	hcd->rsrc_len = resource_size(res);
	120
148e1134 TR	121	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	122	if (IS_ERR(hcd->regs)) {
	123	ret = PTR_ERR(hcd->regs);
a926e298	124	goto fail_request_resource;
63c84552 PM	125	}
63c84552 PM	126
a926e298 JL	127	priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
a926e298 JL	128	GFP_KERNEL);
63c84552 PM	129	if (!priv) {
	130	dev_dbg(&pdev->dev, "error allocating priv data\n");
	131	ret = -ENOMEM;
a926e298	132	goto fail_request_resource;
63c84552 PM	133	}
	134
	135	/* These are optional, we don't care if they fail */
a926e298	136	priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
63c84552 PM	137	if (IS_ERR(priv->fclk))
	138	priv->fclk = NULL;
	139
a926e298	140	priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
63c84552 PM	141	if (IS_ERR(priv->iclk))
	142	priv->iclk = NULL;
	143
	144	clk_enable(priv->fclk);
	145	clk_enable(priv->iclk);
	146
3e0c70d0 NI	147	if (pdata && pdata->phy_init)
	148	pdata->phy_init();
	149
b5dd18d8	150	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
63c84552 PM	151	if (ret != 0) {
	152	dev_err(&pdev->dev, "Failed to add hcd");
	153	goto fail_add_hcd;
	154	}
	155
	156	priv->hcd = hcd;
	157	platform_set_drvdata(pdev, priv);
	158
	159	return ret;
	160
	161	fail_add_hcd:
	162	clk_disable(priv->iclk);
	163	clk_disable(priv->fclk);
	164
63c84552 PM	165	fail_request_resource:
	166	usb_put_hcd(hcd);
	167	fail_create_hcd:
	168	dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
	169
	170	return ret;
	171	}
	172
	173	static int __exit ehci_hcd_sh_remove(struct platform_device *pdev)
	174	{
	175	struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
	176	struct usb_hcd *hcd = priv->hcd;
	177
	178	usb_remove_hcd(hcd);
63c84552 PM	179	usb_put_hcd(hcd);
	180	platform_set_drvdata(pdev, NULL);
	181
	182	clk_disable(priv->fclk);
	183	clk_disable(priv->iclk);
	184
63c84552 PM	185	return 0;
	186	}
	187
c1e0774d PM	188	static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
	189	{
	190	struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
	191	struct usb_hcd *hcd = priv->hcd;
	192
	193	if (hcd->driver->shutdown)
	194	hcd->driver->shutdown(hcd);
	195	}
	196
63c84552 PM	197	static struct platform_driver ehci_hcd_sh_driver = {
	198	.probe = ehci_hcd_sh_probe,
	199	.remove = __exit_p(ehci_hcd_sh_remove),
c1e0774d	200	.shutdown = ehci_hcd_sh_shutdown,
63c84552 PM	201	.driver = {
	202	.name = "sh_ehci",
	203	.owner = THIS_MODULE,
	204	},
	205	};
	206
	207	MODULE_ALIAS("platform:sh_ehci");