[linux-2.6-block.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);
	int ret;

	ehci->caps = hcd->regs;

	ret = ehci_setup(hcd);
	if (unlikely(ret))
		return ret;

	ehci_port_power(ehci, 0);

	return ret;
}

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);

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
				driver->description)) {
		dev_dbg(&pdev->dev, "controller already in use\n");
		ret = -EBUSY;
		goto fail_request_resource;
	}

	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
	if (hcd->regs == NULL) {
		dev_dbg(&pdev->dev, "error mapping memory\n");
		ret = -ENXIO;
		goto fail_ioremap;
	}

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

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

	priv->iclk = 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);

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

	kfree(priv);
fail_alloc:
	iounmap(hcd->regs);
fail_ioremap:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
	platform_set_drvdata(pdev, NULL);

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

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

	kfree(priv);

	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);
	24	int ret;
	25
	26	ehci->caps = hcd->regs;
63c84552	27
1a49e2ac	28	ret = ehci_setup(hcd);
63c84552 PM	29	if (unlikely(ret))
	30	return ret;
	31
63c84552 PM	32	ehci_port_power(ehci, 0);
	33
	34	return ret;
	35	}
	36
	37	static const struct hc_driver ehci_sh_hc_driver = {
	38	.description = hcd_name,
	39	.product_desc = "SuperH EHCI",
	40	.hcd_priv_size = sizeof(struct ehci_hcd),
	41
	42	/*
	43	* generic hardware linkage
	44	*/
	45	.irq = ehci_irq,
	46	.flags = HCD_USB2 \| HCD_MEMORY,
	47
	48	/*
	49	* basic lifecycle operations
	50	*/
	51	.reset = ehci_sh_reset,
	52	.start = ehci_run,
	53	.stop = ehci_stop,
	54	.shutdown = ehci_shutdown,
	55
	56	/*
	57	* managing i/o requests and associated device resources
	58	*/
	59	.urb_enqueue = ehci_urb_enqueue,
	60	.urb_dequeue = ehci_urb_dequeue,
	61	.endpoint_disable = ehci_endpoint_disable,
6e9d4476	62	.endpoint_reset = ehci_endpoint_reset,
63c84552 PM	63
	64	/*
	65	* scheduling support
	66	*/
	67	.get_frame_number = ehci_get_frame,
	68
	69	/*
	70	* root hub support
	71	*/
	72	.hub_status_data = ehci_hub_status_data,
	73	.hub_control = ehci_hub_control,
	74
	75	#ifdef CONFIG_PM
	76	.bus_suspend = ehci_bus_suspend,
	77	.bus_resume = ehci_bus_resume,
	78	#endif
	79
	80	.relinquish_port = ehci_relinquish_port,
	81	.port_handed_over = ehci_port_handed_over,
6e9d4476	82	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
63c84552 PM	83	};
	84
	85	static int ehci_hcd_sh_probe(struct platform_device *pdev)
	86	{
	87	const struct hc_driver *driver = &ehci_sh_hc_driver;
	88	struct resource *res;
	89	struct ehci_sh_priv *priv;
3e0c70d0	90	struct ehci_sh_platdata *pdata;
63c84552 PM	91	struct usb_hcd *hcd;
	92	int irq, ret;
	93
	94	if (usb_disabled())
	95	return -ENODEV;
	96
	97	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	98	if (!res) {
	99	dev_err(&pdev->dev,
	100	"Found HC with no register addr. Check %s setup!\n",
	101	dev_name(&pdev->dev));
	102	ret = -ENODEV;
	103	goto fail_create_hcd;
	104	}
	105
	106	irq = platform_get_irq(pdev, 0);
	107	if (irq <= 0) {
	108	dev_err(&pdev->dev,
	109	"Found HC with no IRQ. Check %s setup!\n",
	110	dev_name(&pdev->dev));
	111	ret = -ENODEV;
	112	goto fail_create_hcd;
	113	}
	114
5897b038	115	pdata = pdev->dev.platform_data;
3e0c70d0	116
63c84552 PM	117	/* initialize hcd */
	118	hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
	119	dev_name(&pdev->dev));
	120	if (!hcd) {
	121	ret = -ENOMEM;
	122	goto fail_create_hcd;
	123	}
	124
	125	hcd->rsrc_start = res->start;
	126	hcd->rsrc_len = resource_size(res);
	127
	128	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
	129	driver->description)) {
	130	dev_dbg(&pdev->dev, "controller already in use\n");
	131	ret = -EBUSY;
	132	goto fail_request_resource;
	133	}
	134
	135	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
	136	if (hcd->regs == NULL) {
	137	dev_dbg(&pdev->dev, "error mapping memory\n");
	138	ret = -ENXIO;
	139	goto fail_ioremap;
	140	}
	141
	142	priv = kmalloc(sizeof(struct ehci_sh_priv), GFP_KERNEL);
	143	if (!priv) {
	144	dev_dbg(&pdev->dev, "error allocating priv data\n");
	145	ret = -ENOMEM;
	146	goto fail_alloc;
	147	}
	148
	149	/* These are optional, we don't care if they fail */
	150	priv->fclk = clk_get(&pdev->dev, "usb_fck");
	151	if (IS_ERR(priv->fclk))
	152	priv->fclk = NULL;
	153
	154	priv->iclk = clk_get(&pdev->dev, "usb_ick");
	155	if (IS_ERR(priv->iclk))
	156	priv->iclk = NULL;
	157
	158	clk_enable(priv->fclk);
	159	clk_enable(priv->iclk);
	160
3e0c70d0 NI	161	if (pdata && pdata->phy_init)
	162	pdata->phy_init();
	163
b5dd18d8	164	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
63c84552 PM	165	if (ret != 0) {
	166	dev_err(&pdev->dev, "Failed to add hcd");
	167	goto fail_add_hcd;
	168	}
	169
	170	priv->hcd = hcd;
	171	platform_set_drvdata(pdev, priv);
	172
	173	return ret;
	174
	175	fail_add_hcd:
	176	clk_disable(priv->iclk);
	177	clk_disable(priv->fclk);
	178
	179	clk_put(priv->iclk);
	180	clk_put(priv->fclk);
	181
	182	kfree(priv);
	183	fail_alloc:
	184	iounmap(hcd->regs);
	185	fail_ioremap:
	186	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	187	fail_request_resource:
	188	usb_put_hcd(hcd);
	189	fail_create_hcd:
	190	dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
	191
	192	return ret;
	193	}
	194
	195	static int __exit ehci_hcd_sh_remove(struct platform_device *pdev)
	196	{
	197	struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
	198	struct usb_hcd *hcd = priv->hcd;
	199
	200	usb_remove_hcd(hcd);
	201	iounmap(hcd->regs);
	202	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	203	usb_put_hcd(hcd);
	204	platform_set_drvdata(pdev, NULL);
	205
	206	clk_disable(priv->fclk);
	207	clk_disable(priv->iclk);
	208
	209	clk_put(priv->fclk);
	210	clk_put(priv->iclk);
	211
	212	kfree(priv);
	213
	214	return 0;
	215	}
	216
c1e0774d PM	217	static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
	218	{
	219	struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
	220	struct usb_hcd *hcd = priv->hcd;
	221
	222	if (hcd->driver->shutdown)
	223	hcd->driver->shutdown(hcd);
	224	}
	225
63c84552 PM	226	static struct platform_driver ehci_hcd_sh_driver = {
	227	.probe = ehci_hcd_sh_probe,
	228	.remove = __exit_p(ehci_hcd_sh_remove),
c1e0774d	229	.shutdown = ehci_hcd_sh_shutdown,
63c84552 PM	230	.driver = {
	231	.name = "sh_ehci",
	232	.owner = THIS_MODULE,
	233	},
	234	};
	235
	236	MODULE_ALIAS("platform:sh_ehci");