[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);
	int ret;

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

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

	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);

	ret = ehci_halt(ehci);
	if (unlikely(ret))
		return ret;

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

	ehci->sbrn = 0x20;

	ehci_reset(ehci);
	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;
c430131a	27	ehci->regs = hcd->regs + HC_LENGTH(ehci, ehci_readl(ehci,
63c84552 PM	28	&ehci->caps->hc_capbase));
	29
	30	dbg_hcs_params(ehci, "reset");
	31	dbg_hcc_params(ehci, "reset");
	32
	33	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
	34
	35	ret = ehci_halt(ehci);
	36	if (unlikely(ret))
	37	return ret;
	38
	39	ret = ehci_init(hcd);
	40	if (unlikely(ret))
	41	return ret;
	42
	43	ehci->sbrn = 0x20;
	44
	45	ehci_reset(ehci);
	46	ehci_port_power(ehci, 0);
	47
	48	return ret;
	49	}
	50
	51	static const struct hc_driver ehci_sh_hc_driver = {
	52	.description = hcd_name,
	53	.product_desc = "SuperH EHCI",
	54	.hcd_priv_size = sizeof(struct ehci_hcd),
	55
	56	/*
	57	* generic hardware linkage
	58	*/
	59	.irq = ehci_irq,
	60	.flags = HCD_USB2 \| HCD_MEMORY,
	61
	62	/*
	63	* basic lifecycle operations
	64	*/
	65	.reset = ehci_sh_reset,
	66	.start = ehci_run,
	67	.stop = ehci_stop,
	68	.shutdown = ehci_shutdown,
	69
	70	/*
	71	* managing i/o requests and associated device resources
	72	*/
	73	.urb_enqueue = ehci_urb_enqueue,
	74	.urb_dequeue = ehci_urb_dequeue,
	75	.endpoint_disable = ehci_endpoint_disable,
6e9d4476	76	.endpoint_reset = ehci_endpoint_reset,
63c84552 PM	77
	78	/*
	79	* scheduling support
	80	*/
	81	.get_frame_number = ehci_get_frame,
	82
	83	/*
	84	* root hub support
	85	*/
	86	.hub_status_data = ehci_hub_status_data,
	87	.hub_control = ehci_hub_control,
	88
	89	#ifdef CONFIG_PM
	90	.bus_suspend = ehci_bus_suspend,
	91	.bus_resume = ehci_bus_resume,
	92	#endif
	93
	94	.relinquish_port = ehci_relinquish_port,
	95	.port_handed_over = ehci_port_handed_over,
6e9d4476	96	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
63c84552 PM	97	};
	98
	99	static int ehci_hcd_sh_probe(struct platform_device *pdev)
	100	{
	101	const struct hc_driver *driver = &ehci_sh_hc_driver;
	102	struct resource *res;
	103	struct ehci_sh_priv *priv;
3e0c70d0	104	struct ehci_sh_platdata *pdata;
63c84552 PM	105	struct usb_hcd *hcd;
	106	int irq, ret;
	107
	108	if (usb_disabled())
	109	return -ENODEV;
	110
	111	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	112	if (!res) {
	113	dev_err(&pdev->dev,
	114	"Found HC with no register addr. Check %s setup!\n",
	115	dev_name(&pdev->dev));
	116	ret = -ENODEV;
	117	goto fail_create_hcd;
	118	}
	119
	120	irq = platform_get_irq(pdev, 0);
	121	if (irq <= 0) {
	122	dev_err(&pdev->dev,
	123	"Found HC with no IRQ. Check %s setup!\n",
	124	dev_name(&pdev->dev));
	125	ret = -ENODEV;
	126	goto fail_create_hcd;
	127	}
	128
5897b038	129	pdata = pdev->dev.platform_data;
3e0c70d0	130
63c84552 PM	131	/* initialize hcd */
	132	hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
	133	dev_name(&pdev->dev));
	134	if (!hcd) {
	135	ret = -ENOMEM;
	136	goto fail_create_hcd;
	137	}
	138
	139	hcd->rsrc_start = res->start;
	140	hcd->rsrc_len = resource_size(res);
	141
	142	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
	143	driver->description)) {
	144	dev_dbg(&pdev->dev, "controller already in use\n");
	145	ret = -EBUSY;
	146	goto fail_request_resource;
	147	}
	148
	149	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
	150	if (hcd->regs == NULL) {
	151	dev_dbg(&pdev->dev, "error mapping memory\n");
	152	ret = -ENXIO;
	153	goto fail_ioremap;
	154	}
	155
	156	priv = kmalloc(sizeof(struct ehci_sh_priv), GFP_KERNEL);
	157	if (!priv) {
	158	dev_dbg(&pdev->dev, "error allocating priv data\n");
	159	ret = -ENOMEM;
	160	goto fail_alloc;
	161	}
	162
	163	/* These are optional, we don't care if they fail */
	164	priv->fclk = clk_get(&pdev->dev, "usb_fck");
	165	if (IS_ERR(priv->fclk))
	166	priv->fclk = NULL;
	167
	168	priv->iclk = clk_get(&pdev->dev, "usb_ick");
	169	if (IS_ERR(priv->iclk))
	170	priv->iclk = NULL;
	171
	172	clk_enable(priv->fclk);
	173	clk_enable(priv->iclk);
	174
3e0c70d0 NI	175	if (pdata && pdata->phy_init)
	176	pdata->phy_init();
	177
b5dd18d8	178	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
63c84552 PM	179	if (ret != 0) {
	180	dev_err(&pdev->dev, "Failed to add hcd");
	181	goto fail_add_hcd;
	182	}
	183
	184	priv->hcd = hcd;
	185	platform_set_drvdata(pdev, priv);
	186
	187	return ret;
	188
	189	fail_add_hcd:
	190	clk_disable(priv->iclk);
	191	clk_disable(priv->fclk);
	192
	193	clk_put(priv->iclk);
	194	clk_put(priv->fclk);
	195
	196	kfree(priv);
	197	fail_alloc:
	198	iounmap(hcd->regs);
	199	fail_ioremap:
	200	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	201	fail_request_resource:
	202	usb_put_hcd(hcd);
	203	fail_create_hcd:
	204	dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
	205
	206	return ret;
	207	}
	208
	209	static int __exit ehci_hcd_sh_remove(struct platform_device *pdev)
	210	{
	211	struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
	212	struct usb_hcd *hcd = priv->hcd;
	213
	214	usb_remove_hcd(hcd);
	215	iounmap(hcd->regs);
	216	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	217	usb_put_hcd(hcd);
	218	platform_set_drvdata(pdev, NULL);
	219
	220	clk_disable(priv->fclk);
	221	clk_disable(priv->iclk);
	222
	223	clk_put(priv->fclk);
	224	clk_put(priv->iclk);
	225
	226	kfree(priv);
	227
	228	return 0;
	229	}
	230
c1e0774d PM	231	static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
	232	{
	233	struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
	234	struct usb_hcd *hcd = priv->hcd;
	235
	236	if (hcd->driver->shutdown)
	237	hcd->driver->shutdown(hcd);
	238	}
	239
63c84552 PM	240	static struct platform_driver ehci_hcd_sh_driver = {
	241	.probe = ehci_hcd_sh_probe,
	242	.remove = __exit_p(ehci_hcd_sh_remove),
c1e0774d	243	.shutdown = ehci_hcd_sh_shutdown,
63c84552 PM	244	.driver = {
	245	.name = "sh_ehci",
	246	.owner = THIS_MODULE,
	247	},
	248	};
	249
	250	MODULE_ALIAS("platform:sh_ehci");