[deliverable/linux.git] / drivers / usb / chipidea / usbmisc_imx.c

/*
 * Copyright 2012 Freescale Semiconductor, Inc.
 *
 * The code contained herein is licensed under the GNU General Public
 * License. You may obtain a copy of the GNU General Public License
 * Version 2 or later at the following locations:
 *
 * http://www.opensource.org/licenses/gpl-license.html
 * http://www.gnu.org/copyleft/gpl.html
 */

#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/delay.h>

#include "ci13xxx_imx.h"

#define USB_DEV_MAX 4

#define MX25_USB_PHY_CTRL_OFFSET	0x08
#define MX25_BM_EXTERNAL_VBUS_DIVIDER	BIT(23)

#define MX53_USB_OTG_PHY_CTRL_0_OFFSET	0x08
#define MX53_USB_UH2_CTRL_OFFSET	0x14
#define MX53_USB_UH3_CTRL_OFFSET	0x18
#define MX53_BM_OVER_CUR_DIS_H1		BIT(5)
#define MX53_BM_OVER_CUR_DIS_OTG	BIT(8)
#define MX53_BM_OVER_CUR_DIS_UHx	BIT(30)

#define MX6_BM_OVER_CUR_DIS		BIT(7)

struct imx_usbmisc {
	void __iomem *base;
	spinlock_t lock;
	struct clk *clk;
	struct usbmisc_usb_device usbdev[USB_DEV_MAX];
	const struct usbmisc_ops *ops;
};

static struct imx_usbmisc *usbmisc;

static struct usbmisc_usb_device *get_usbdev(struct device *dev)
{
	int i, ret;

	for (i = 0; i < USB_DEV_MAX; i++) {
		if (usbmisc->usbdev[i].dev == dev)
			return &usbmisc->usbdev[i];
		else if (!usbmisc->usbdev[i].dev)
			break;
	}

	if (i >= USB_DEV_MAX)
		return ERR_PTR(-EBUSY);

	ret = usbmisc_get_init_data(dev, &usbmisc->usbdev[i]);
	if (ret)
		return ERR_PTR(ret);

	return &usbmisc->usbdev[i];
}

static int usbmisc_imx25_post(struct device *dev)
{
	struct usbmisc_usb_device *usbdev;
	void __iomem *reg;
	unsigned long flags;
	u32 val;

	usbdev = get_usbdev(dev);
	if (IS_ERR(usbdev))
		return PTR_ERR(usbdev);

	reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET;

	if (usbdev->evdo) {
		spin_lock_irqsave(&usbmisc->lock, flags);
		val = readl(reg);
		writel(val | MX25_BM_EXTERNAL_VBUS_DIVIDER, reg);
		spin_unlock_irqrestore(&usbmisc->lock, flags);
		usleep_range(5000, 10000); /* needed to stabilize voltage */
	}

	return 0;
}

static int usbmisc_imx53_init(struct device *dev)
{
	struct usbmisc_usb_device *usbdev;
	void __iomem *reg = NULL;
	unsigned long flags;
	u32 val = 0;

	usbdev = get_usbdev(dev);
	if (IS_ERR(usbdev))
		return PTR_ERR(usbdev);

	if (usbdev->disable_oc) {
		spin_lock_irqsave(&usbmisc->lock, flags);
		switch (usbdev->index) {
		case 0:
			reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
			val = readl(reg) | MX53_BM_OVER_CUR_DIS_OTG;
			break;
		case 1:
			reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
			val = readl(reg) | MX53_BM_OVER_CUR_DIS_H1;
			break;
		case 2:
			reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET;
			val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
			break;
		case 3:
			reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET;
			val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
			break;
		}
		if (reg && val)
			writel(val, reg);
		spin_unlock_irqrestore(&usbmisc->lock, flags);
	}

	return 0;
}

static int usbmisc_imx6q_init(struct device *dev)
{

	struct usbmisc_usb_device *usbdev;
	unsigned long flags;
	u32 reg;

	usbdev = get_usbdev(dev);
	if (IS_ERR(usbdev))
		return PTR_ERR(usbdev);

	if (usbdev->disable_oc) {
		spin_lock_irqsave(&usbmisc->lock, flags);
		reg = readl(usbmisc->base + usbdev->index * 4);
		writel(reg | MX6_BM_OVER_CUR_DIS,
			usbmisc->base + usbdev->index * 4);
		spin_unlock_irqrestore(&usbmisc->lock, flags);
	}

	return 0;
}

static const struct usbmisc_ops imx25_usbmisc_ops = {
	.post = usbmisc_imx25_post,
};

static const struct usbmisc_ops imx53_usbmisc_ops = {
	.init = usbmisc_imx53_init,
};

static const struct usbmisc_ops imx6q_usbmisc_ops = {
	.init = usbmisc_imx6q_init,
};

static const struct of_device_id usbmisc_imx_dt_ids[] = {
	{
		.compatible = "fsl,imx25-usbmisc",
		.data = &imx25_usbmisc_ops,
	},
	{
		.compatible = "fsl,imx53-usbmisc",
		.data = &imx53_usbmisc_ops,
	},
	{
		.compatible = "fsl,imx6q-usbmisc",
		.data = &imx6q_usbmisc_ops,
	},
	{ /* sentinel */ }
};

static int usbmisc_imx_probe(struct platform_device *pdev)
{
	struct resource	*res;
	struct imx_usbmisc *data;
	int ret;
	struct of_device_id *tmp_dev;

	if (usbmisc)
		return -EBUSY;

	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	spin_lock_init(&data->lock);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	data->base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(data->base))
		return PTR_ERR(data->base);

	data->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(data->clk)) {
		dev_err(&pdev->dev,
			"failed to get clock, err=%ld\n", PTR_ERR(data->clk));
		return PTR_ERR(data->clk);
	}

	ret = clk_prepare_enable(data->clk);
	if (ret) {
		dev_err(&pdev->dev,
			"clk_prepare_enable failed, err=%d\n", ret);
		return ret;
	}

	tmp_dev = (struct of_device_id *)
		of_match_device(usbmisc_imx_dt_ids, &pdev->dev);
	data->ops = (const struct usbmisc_ops *)tmp_dev->data;
	usbmisc = data;
	ret = usbmisc_set_ops(data->ops);
	if (ret) {
		usbmisc = NULL;
		clk_disable_unprepare(data->clk);
		return ret;
	}

	return 0;
}

static int usbmisc_imx_remove(struct platform_device *pdev)
{
	usbmisc_unset_ops(usbmisc->ops);
	clk_disable_unprepare(usbmisc->clk);
	usbmisc = NULL;
	return 0;
}

static struct platform_driver usbmisc_imx_driver = {
	.probe = usbmisc_imx_probe,
	.remove = usbmisc_imx_remove,
	.driver = {
		.name = "usbmisc_imx",
		.owner = THIS_MODULE,
		.of_match_table = usbmisc_imx_dt_ids,
	 },
};

static int usbmisc_imx_drv_init(void)
{
	return platform_driver_register(&usbmisc_imx_driver);
}
subsys_initcall(usbmisc_imx_drv_init);

static void usbmisc_imx_drv_exit(void)
{
	platform_driver_unregister(&usbmisc_imx_driver);
}
module_exit(usbmisc_imx_drv_exit);

MODULE_ALIAS("platform:usbmisc-imx");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("driver for imx usb non-core registers");
MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
Commit	Line	Data
d142d6be RZ	1	/*
	2	* Copyright 2012 Freescale Semiconductor, Inc.
	3	*
	4	* The code contained herein is licensed under the GNU General Public
	5	* License. You may obtain a copy of the GNU General Public License
	6	* Version 2 or later at the following locations:
	7	*
	8	* http://www.opensource.org/licenses/gpl-license.html
	9	* http://www.gnu.org/copyleft/gpl.html
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/of_platform.h>
	14	#include <linux/clk.h>
	15	#include <linux/err.h>
	16	#include <linux/io.h>
a0685330	17	#include <linux/delay.h>
d142d6be RZ	18
	19	#include "ci13xxx_imx.h"
	20
	21	#define USB_DEV_MAX 4
	22
a0685330 MG	23	#define MX25_USB_PHY_CTRL_OFFSET 0x08
	24	#define MX25_BM_EXTERNAL_VBUS_DIVIDER BIT(23)
	25
f0c910b6 MG	26	#define MX53_USB_OTG_PHY_CTRL_0_OFFSET 0x08
	27	#define MX53_USB_UH2_CTRL_OFFSET 0x14
	28	#define MX53_USB_UH3_CTRL_OFFSET 0x18
	29	#define MX53_BM_OVER_CUR_DIS_H1 BIT(5)
	30	#define MX53_BM_OVER_CUR_DIS_OTG BIT(8)
	31	#define MX53_BM_OVER_CUR_DIS_UHx BIT(30)
	32
e609108a	33	#define MX6_BM_OVER_CUR_DIS BIT(7)
d142d6be	34
a7bc2fdf	35	struct imx_usbmisc {
d142d6be RZ	36	void __iomem *base;
	37	spinlock_t lock;
	38	struct clk *clk;
	39	struct usbmisc_usb_device usbdev[USB_DEV_MAX];
e609108a	40	const struct usbmisc_ops *ops;
d142d6be RZ	41	};
d142d6be RZ	42
a7bc2fdf	43	static struct imx_usbmisc *usbmisc;
d142d6be RZ	44
	45	static struct usbmisc_usb_device get_usbdev(struct device dev)
	46	{
	47	int i, ret;
	48
	49	for (i = 0; i < USB_DEV_MAX; i++) {
	50	if (usbmisc->usbdev[i].dev == dev)
	51	return &usbmisc->usbdev[i];
	52	else if (!usbmisc->usbdev[i].dev)
	53	break;
	54	}
	55
	56	if (i >= USB_DEV_MAX)
	57	return ERR_PTR(-EBUSY);
	58
	59	ret = usbmisc_get_init_data(dev, &usbmisc->usbdev[i]);
	60	if (ret)
	61	return ERR_PTR(ret);
	62
	63	return &usbmisc->usbdev[i];
	64	}
	65
a0685330 MG	66	static int usbmisc_imx25_post(struct device *dev)
	67	{
	68	struct usbmisc_usb_device *usbdev;
	69	void __iomem *reg;
	70	unsigned long flags;
	71	u32 val;
	72
	73	usbdev = get_usbdev(dev);
	74	if (IS_ERR(usbdev))
	75	return PTR_ERR(usbdev);
	76
	77	reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET;
	78
	79	if (usbdev->evdo) {
	80	spin_lock_irqsave(&usbmisc->lock, flags);
	81	val = readl(reg);
	82	writel(val \| MX25_BM_EXTERNAL_VBUS_DIVIDER, reg);
	83	spin_unlock_irqrestore(&usbmisc->lock, flags);
	84	usleep_range(5000, 10000); /* needed to stabilize voltage */
	85	}
	86
	87	return 0;
	88	}
	89
f0c910b6 MG	90	static int usbmisc_imx53_init(struct device *dev)
	91	{
	92	struct usbmisc_usb_device *usbdev;
	93	void __iomem *reg = NULL;
	94	unsigned long flags;
	95	u32 val = 0;
	96
	97	usbdev = get_usbdev(dev);
	98	if (IS_ERR(usbdev))
	99	return PTR_ERR(usbdev);
	100
	101	if (usbdev->disable_oc) {
	102	spin_lock_irqsave(&usbmisc->lock, flags);
	103	switch (usbdev->index) {
	104	case 0:
	105	reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
	106	val = readl(reg) \| MX53_BM_OVER_CUR_DIS_OTG;
	107	break;
	108	case 1:
	109	reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
	110	val = readl(reg) \| MX53_BM_OVER_CUR_DIS_H1;
	111	break;
	112	case 2:
	113	reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET;
	114	val = readl(reg) \| MX53_BM_OVER_CUR_DIS_UHx;
	115	break;
	116	case 3:
	117	reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET;
	118	val = readl(reg) \| MX53_BM_OVER_CUR_DIS_UHx;
	119	break;
	120	}
	121	if (reg && val)
	122	writel(val, reg);
	123	spin_unlock_irqrestore(&usbmisc->lock, flags);
	124	}
	125
	126	return 0;
	127	}
	128
d142d6be RZ	129	static int usbmisc_imx6q_init(struct device *dev)
	130	{
	131
	132	struct usbmisc_usb_device *usbdev;
	133	unsigned long flags;
	134	u32 reg;
	135
	136	usbdev = get_usbdev(dev);
	137	if (IS_ERR(usbdev))
	138	return PTR_ERR(usbdev);
	139
	140	if (usbdev->disable_oc) {
	141	spin_lock_irqsave(&usbmisc->lock, flags);
	142	reg = readl(usbmisc->base + usbdev->index * 4);
e609108a	143	writel(reg \| MX6_BM_OVER_CUR_DIS,
d142d6be RZ	144	usbmisc->base + usbdev->index * 4);
	145	spin_unlock_irqrestore(&usbmisc->lock, flags);
	146	}
	147
	148	return 0;
	149	}
	150
a0685330 MG	151	static const struct usbmisc_ops imx25_usbmisc_ops = {
	152	.post = usbmisc_imx25_post,
	153	};
	154
f0c910b6 MG	155	static const struct usbmisc_ops imx53_usbmisc_ops = {
	156	.init = usbmisc_imx53_init,
	157	};
	158
d142d6be RZ	159	static const struct usbmisc_ops imx6q_usbmisc_ops = {
	160	.init = usbmisc_imx6q_init,
	161	};
	162
a7bc2fdf	163	static const struct of_device_id usbmisc_imx_dt_ids[] = {
a0685330 MG	164	{
	165	.compatible = "fsl,imx25-usbmisc",
	166	.data = &imx25_usbmisc_ops,
	167	},
f0c910b6 MG	168	{
	169	.compatible = "fsl,imx53-usbmisc",
	170	.data = &imx53_usbmisc_ops,
	171	},
e609108a MKB	172	{
	173	.compatible = "fsl,imx6q-usbmisc",
	174	.data = &imx6q_usbmisc_ops,
	175	},
d142d6be RZ	176	{ /* sentinel */ }
	177	};
	178
a7bc2fdf	179	static int usbmisc_imx_probe(struct platform_device *pdev)
d142d6be RZ	180	{
d142d6be RZ	181	struct resource *res;
a7bc2fdf	182	struct imx_usbmisc *data;
d142d6be	183	int ret;
e609108a	184	struct of_device_id *tmp_dev;
d142d6be RZ	185
	186	if (usbmisc)
	187	return -EBUSY;
	188
	189	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
	190	if (!data)
	191	return -ENOMEM;
	192
	193	spin_lock_init(&data->lock);
	194
	195	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
148e1134 TR	196	data->base = devm_ioremap_resource(&pdev->dev, res);
	197	if (IS_ERR(data->base))
	198	return PTR_ERR(data->base);
d142d6be RZ	199
	200	data->clk = devm_clk_get(&pdev->dev, NULL);
	201	if (IS_ERR(data->clk)) {
	202	dev_err(&pdev->dev,
	203	"failed to get clock, err=%ld\n", PTR_ERR(data->clk));
	204	return PTR_ERR(data->clk);
	205	}
	206
	207	ret = clk_prepare_enable(data->clk);
	208	if (ret) {
	209	dev_err(&pdev->dev,
	210	"clk_prepare_enable failed, err=%d\n", ret);
	211	return ret;
	212	}
	213
e609108a MKB	214	tmp_dev = (struct of_device_id *)
	215	of_match_device(usbmisc_imx_dt_ids, &pdev->dev);
	216	data->ops = (const struct usbmisc_ops *)tmp_dev->data;
00b9a1f9	217	usbmisc = data;
e609108a	218	ret = usbmisc_set_ops(data->ops);
d142d6be	219	if (ret) {
00b9a1f9	220	usbmisc = NULL;
d142d6be RZ	221	clk_disable_unprepare(data->clk);
	222	return ret;
	223	}
	224
d142d6be RZ	225	return 0;
	226	}
	227
a7bc2fdf	228	static int usbmisc_imx_remove(struct platform_device *pdev)
d142d6be	229	{
e609108a	230	usbmisc_unset_ops(usbmisc->ops);
d142d6be	231	clk_disable_unprepare(usbmisc->clk);
d48a24db	232	usbmisc = NULL;
d142d6be RZ	233	return 0;
	234	}
	235
a7bc2fdf MG	236	static struct platform_driver usbmisc_imx_driver = {
	237	.probe = usbmisc_imx_probe,
	238	.remove = usbmisc_imx_remove,
d142d6be	239	.driver = {
a7bc2fdf	240	.name = "usbmisc_imx",
d142d6be	241	.owner = THIS_MODULE,
a7bc2fdf	242	.of_match_table = usbmisc_imx_dt_ids,
d142d6be RZ	243	},
	244	};
	245
f6a57507	246	static int usbmisc_imx_drv_init(void)
d142d6be	247	{
a7bc2fdf	248	return platform_driver_register(&usbmisc_imx_driver);
d142d6be	249	}
a7bc2fdf	250	subsys_initcall(usbmisc_imx_drv_init);
d142d6be	251
f6a57507	252	static void usbmisc_imx_drv_exit(void)
d142d6be	253	{
a7bc2fdf	254	platform_driver_unregister(&usbmisc_imx_driver);
d142d6be	255	}
a7bc2fdf	256	module_exit(usbmisc_imx_drv_exit);
d142d6be	257
a7bc2fdf	258	MODULE_ALIAS("platform:usbmisc-imx");
d142d6be	259	MODULE_LICENSE("GPL v2");
a7bc2fdf	260	MODULE_DESCRIPTION("driver for imx usb non-core registers");
d142d6be	261	MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");