[mirror_ubuntu-artful-kernel.git] / drivers / usb / host / ehci-w90x900.c

/*
 * linux/driver/usb/host/ehci-w90x900.c
 *
 * Copyright (c) 2008 Nuvoton technology corporation.
 *
 * Wan ZongShun <mcuos.com@gmail.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;version 2 of the License.
 *
 */

#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>

#include "ehci.h"

/* enable phy0 and phy1 for w90p910 */
#define	ENPHY		(0x01<<8)
#define PHY0_CTR	(0xA4)
#define PHY1_CTR	(0xA8)

#define DRIVER_DESC "EHCI w90x900 driver"

static const char hcd_name[] = "ehci-w90x900 ";

static struct hc_driver __read_mostly ehci_w90x900_hc_driver;

static int ehci_w90x900_probe(struct platform_device *pdev)
{
	struct usb_hcd *hcd;
	struct ehci_hcd *ehci;
	struct resource *res;
	int retval = 0, irq;
	unsigned long val;

	hcd = usb_create_hcd(&ehci_w90x900_hc_driver,
			&pdev->dev, "w90x900 EHCI");
	if (!hcd) {
		retval = -ENOMEM;
		goto err1;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(hcd->regs)) {
		retval = PTR_ERR(hcd->regs);
		goto err2;
	}
	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);

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

	/* enable PHY 0,1,the regs only apply to w90p910
	 *  0xA4,0xA8 were offsets of PHY0 and PHY1 controller of
	 *  w90p910 IC relative to ehci->regs.
	 */
	val = __raw_readl(ehci->regs+PHY0_CTR);
	val |= ENPHY;
	__raw_writel(val, ehci->regs+PHY0_CTR);

	val = __raw_readl(ehci->regs+PHY1_CTR);
	val |= ENPHY;
	__raw_writel(val, ehci->regs+PHY1_CTR);

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		retval = irq;
		goto err2;
	}

	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (retval != 0)
		goto err2;

	device_wakeup_enable(hcd->self.controller);
	return retval;
err2:
	usb_put_hcd(hcd);
err1:
	return retval;
}

static int ehci_w90x900_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	usb_remove_hcd(hcd);
	usb_put_hcd(hcd);

	return 0;
}

static struct platform_driver ehci_hcd_w90x900_driver = {
	.probe  = ehci_w90x900_probe,
	.remove = ehci_w90x900_remove,
	.driver = {
		.name = "w90x900-ehci",
	},
};

static int __init ehci_w90X900_init(void)
{
	if (usb_disabled())
		return -ENODEV;

	pr_info("%s: " DRIVER_DESC "\n", hcd_name);

	ehci_init_driver(&ehci_w90x900_hc_driver, NULL);
	return platform_driver_register(&ehci_hcd_w90x900_driver);
}
module_init(ehci_w90X900_init);

static void __exit ehci_w90X900_cleanup(void)
{
	platform_driver_unregister(&ehci_hcd_w90x900_driver);
}
module_exit(ehci_w90X900_cleanup);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
MODULE_ALIAS("platform:w90p910-ehci");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
586dfc8c WZ	1	/*
	2	* linux/driver/usb/host/ehci-w90x900.c
	3	*
	4	* Copyright (c) 2008 Nuvoton technology corporation.
	5	*
	6	* Wan ZongShun <mcuos.com@gmail.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation;version 2 of the License.
	11	*
	12	*/
	13
a60f4f81 MG	14	#include <linux/dma-mapping.h>
	15	#include <linux/io.h>
	16	#include <linux/kernel.h>
	17	#include <linux/module.h>
	18	#include <linux/of.h>
586dfc8c	19	#include <linux/platform_device.h>
a60f4f81 MG	20	#include <linux/usb.h>
	21	#include <linux/usb/hcd.h>
	22
	23	#include "ehci.h"
586dfc8c	24
bd066eef	25	/* enable phy0 and phy1 for w90p910 */
586dfc8c WZ	26	#define ENPHY (0x01<<8)
	27	#define PHY0_CTR (0xA4)
	28	#define PHY1_CTR (0xA8)
	29
a60f4f81 MG	30	#define DRIVER_DESC "EHCI w90x900 driver"
	31
	32	static const char hcd_name[] = "ehci-w90x900 ";
	33
	34	static struct hc_driver __read_mostly ehci_w90x900_hc_driver;
	35
fd3ed14e	36	static int ehci_w90x900_probe(struct platform_device *pdev)
586dfc8c WZ	37	{
	38	struct usb_hcd *hcd;
	39	struct ehci_hcd *ehci;
	40	struct resource *res;
	41	int retval = 0, irq;
	42	unsigned long val;
	43
fd3ed14e MG	44	hcd = usb_create_hcd(&ehci_w90x900_hc_driver,
fd3ed14e MG	45	&pdev->dev, "w90x900 EHCI");
586dfc8c WZ	46	if (!hcd) {
	47	retval = -ENOMEM;
	48	goto err1;
	49	}
	50
0af6b070	51	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
849da2dc JH	52	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	53	if (IS_ERR(hcd->regs)) {
	54	retval = PTR_ERR(hcd->regs);
586dfc8c WZ	55	goto err2;
586dfc8c WZ	56	}
0af6b070 VB	57	hcd->rsrc_start = res->start;
0af6b070 VB	58	hcd->rsrc_len = resource_size(res);
586dfc8c	59
586dfc8c WZ	60	ehci = hcd_to_ehci(hcd);
	61	ehci->caps = hcd->regs;
	62	ehci->regs = hcd->regs +
c430131a	63	HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
586dfc8c WZ	64
586dfc8c WZ	65	/* enable PHY 0,1,the regs only apply to w90p910
fd3ed14e MG	66	* 0xA4,0xA8 were offsets of PHY0 and PHY1 controller of
	67	* w90p910 IC relative to ehci->regs.
	68	*/
586dfc8c WZ	69	val = __raw_readl(ehci->regs+PHY0_CTR);
	70	val \|= ENPHY;
	71	__raw_writel(val, ehci->regs+PHY0_CTR);
	72
	73	val = __raw_readl(ehci->regs+PHY1_CTR);
	74	val \|= ENPHY;
	75	__raw_writel(val, ehci->regs+PHY1_CTR);
	76
586dfc8c	77	irq = platform_get_irq(pdev, 0);
0bfed505 JL	78	if (irq < 0) {
0bfed505 JL	79	retval = irq;
849da2dc	80	goto err2;
0bfed505	81	}
586dfc8c WZ	82
	83	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
	84	if (retval != 0)
849da2dc	85	goto err2;
586dfc8c	86
3c9740a1	87	device_wakeup_enable(hcd->self.controller);
586dfc8c	88	return retval;
586dfc8c WZ	89	err2:
	90	usb_put_hcd(hcd);
	91	err1:
	92	return retval;
	93	}
	94
fb4e98ab	95	static int ehci_w90x900_remove(struct platform_device *pdev)
586dfc8c WZ	96	{
	97	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	98
fd3ed14e MG	99	usb_remove_hcd(hcd);
fd3ed14e MG	100	usb_put_hcd(hcd);
586dfc8c WZ	101
	102	return 0;
	103	}
	104
	105	static struct platform_driver ehci_hcd_w90x900_driver = {
	106	.probe = ehci_w90x900_probe,
7690417d	107	.remove = ehci_w90x900_remove,
586dfc8c WZ	108	.driver = {
586dfc8c WZ	109	.name = "w90x900-ehci",
586dfc8c WZ	110	},
	111	};
	112
a60f4f81 MG	113	static int __init ehci_w90X900_init(void)
	114	{
	115	if (usb_disabled())
	116	return -ENODEV;
	117
	118	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	119
	120	ehci_init_driver(&ehci_w90x900_hc_driver, NULL);
	121	return platform_driver_register(&ehci_hcd_w90x900_driver);
	122	}
	123	module_init(ehci_w90X900_init);
	124
	125	static void __exit ehci_w90X900_cleanup(void)
	126	{
	127	platform_driver_unregister(&ehci_hcd_w90x900_driver);
	128	}
	129	module_exit(ehci_w90X900_cleanup);
	130
	131	MODULE_DESCRIPTION(DRIVER_DESC);
586dfc8c	132	MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
586dfc8c	133	MODULE_ALIAS("platform:w90p910-ehci");
a60f4f81	134	MODULE_LICENSE("GPL v2");