[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 usb_w90x900_probe(const struct hc_driver *driver,
		      struct platform_device *pdev)
{
	struct usb_hcd *hcd;
	struct ehci_hcd *ehci;
	struct resource *res;
	int retval = 0, irq;
	unsigned long val;


	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		retval = -ENXIO;
		goto err1;
	}

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

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

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
		retval = -EBUSY;
		goto err2;
	}

	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	if (hcd->regs == NULL) {
		retval = -EFAULT;
		goto err3;
	}

	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)
		goto err4;

	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (retval != 0)
		goto err4;

	return retval;
err4:
	iounmap(hcd->regs);
err3:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err2:
	usb_put_hcd(hcd);
err1:
	return retval;
}

static void usb_w90x900_remove(struct usb_hcd *hcd,
			struct platform_device *pdev)
{
	usb_remove_hcd(hcd);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
}

static int ehci_w90x900_probe(struct platform_device *pdev)
{
	if (usb_disabled())
		return -ENODEV;

	return usb_w90x900_probe(&ehci_w90x900_hc_driver, pdev);
}

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

	usb_w90x900_remove(hcd, pdev);

	return 0;
}

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

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
41ac7b3a	36	static int usb_w90x900_probe(const struct hc_driver *driver,
586dfc8c WZ	37	struct platform_device *pdev)
	38	{
	39	struct usb_hcd *hcd;
	40	struct ehci_hcd *ehci;
	41	struct resource *res;
	42	int retval = 0, irq;
	43	unsigned long val;
	44
	45
	46	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	47	if (!res) {
	48	retval = -ENXIO;
	49	goto err1;
	50	}
	51
	52	hcd = usb_create_hcd(driver, &pdev->dev, "w90x900 EHCI");
	53	if (!hcd) {
	54	retval = -ENOMEM;
	55	goto err1;
	56	}
	57
	58	hcd->rsrc_start = res->start;
28f65c11	59	hcd->rsrc_len = resource_size(res);
586dfc8c WZ	60
	61	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
	62	retval = -EBUSY;
	63	goto err2;
	64	}
	65
	66	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	67	if (hcd->regs == NULL) {
	68	retval = -EFAULT;
	69	goto err3;
	70	}
	71
	72	ehci = hcd_to_ehci(hcd);
	73	ehci->caps = hcd->regs;
	74	ehci->regs = hcd->regs +
c430131a	75	HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
586dfc8c WZ	76
	77	/* enable PHY 0,1,the regs only apply to w90p910
	78	* 0xA4,0xA8 were offsets of PHY0 and PHY1 controller of
	79	* w90p910 IC relative to ehci->regs.
	80	*/
	81	val = __raw_readl(ehci->regs+PHY0_CTR);
	82	val \|= ENPHY;
	83	__raw_writel(val, ehci->regs+PHY0_CTR);
	84
	85	val = __raw_readl(ehci->regs+PHY1_CTR);
	86	val \|= ENPHY;
	87	__raw_writel(val, ehci->regs+PHY1_CTR);
	88
586dfc8c WZ	89	irq = platform_get_irq(pdev, 0);
	90	if (irq < 0)
	91	goto err4;
	92
	93	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
	94	if (retval != 0)
	95	goto err4;
	96
586dfc8c WZ	97	return retval;
	98	err4:
	99	iounmap(hcd->regs);
	100	err3:
	101	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	102	err2:
	103	usb_put_hcd(hcd);
	104	err1:
	105	return retval;
	106	}
	107
a60f4f81 MG	108	static void usb_w90x900_remove(struct usb_hcd *hcd,
a60f4f81 MG	109	struct platform_device *pdev)
586dfc8c WZ	110	{
	111	usb_remove_hcd(hcd);
	112	iounmap(hcd->regs);
	113	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	114	usb_put_hcd(hcd);
	115	}
	116
41ac7b3a	117	static int ehci_w90x900_probe(struct platform_device *pdev)
586dfc8c WZ	118	{
	119	if (usb_disabled())
	120	return -ENODEV;
	121
	122	return usb_w90x900_probe(&ehci_w90x900_hc_driver, pdev);
	123	}
	124
fb4e98ab	125	static int ehci_w90x900_remove(struct platform_device *pdev)
586dfc8c WZ	126	{
	127	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	128
	129	usb_w90x900_remove(hcd, pdev);
	130
	131	return 0;
	132	}
	133
	134	static struct platform_driver ehci_hcd_w90x900_driver = {
	135	.probe = ehci_w90x900_probe,
7690417d	136	.remove = ehci_w90x900_remove,
586dfc8c WZ	137	.driver = {
	138	.name = "w90x900-ehci",
	139	.owner = THIS_MODULE,
	140	},
	141	};
	142
a60f4f81 MG	143	static int __init ehci_w90X900_init(void)
	144	{
	145	if (usb_disabled())
	146	return -ENODEV;
	147
	148	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	149
	150	ehci_init_driver(&ehci_w90x900_hc_driver, NULL);
	151	return platform_driver_register(&ehci_hcd_w90x900_driver);
	152	}
	153	module_init(ehci_w90X900_init);
	154
	155	static void __exit ehci_w90X900_cleanup(void)
	156	{
	157	platform_driver_unregister(&ehci_hcd_w90x900_driver);
	158	}
	159	module_exit(ehci_w90X900_cleanup);
	160
	161	MODULE_DESCRIPTION(DRIVER_DESC);
586dfc8c	162	MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
586dfc8c	163	MODULE_ALIAS("platform:w90p910-ehci");
a60f4f81	164	MODULE_LICENSE("GPL v2");