[linux-block.git] / drivers / usb / chipidea / ci_hdrc_usb2.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2014 Marvell Technology Group Ltd.
 *
 * Antoine Tenart <antoine.tenart@free-electrons.com>
 */

#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/usb/chipidea.h>
#include <linux/usb/hcd.h>
#include <linux/usb/ulpi.h>

#include "ci.h"

struct ci_hdrc_usb2_priv {
	struct platform_device	*ci_pdev;
	struct clk		*clk;
};

static const struct ci_hdrc_platform_data ci_default_pdata = {
	.capoffset	= DEF_CAPOFFSET,
	.flags		= CI_HDRC_DISABLE_STREAMING,
};

static const struct ci_hdrc_platform_data ci_zynq_pdata = {
	.capoffset	= DEF_CAPOFFSET,
	.flags          = CI_HDRC_PHY_VBUS_CONTROL,
};

static const struct ci_hdrc_platform_data ci_zevio_pdata = {
	.capoffset	= DEF_CAPOFFSET,
	.flags		= CI_HDRC_REGS_SHARED | CI_HDRC_FORCE_FULLSPEED,
};

static const struct of_device_id ci_hdrc_usb2_of_match[] = {
	{ .compatible = "chipidea,usb2" },
	{ .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata },
	{ .compatible = "lsi,zevio-usb", .data = &ci_zevio_pdata },
	{ }
};
MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);

static int ci_hdrc_usb2_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct ci_hdrc_usb2_priv *priv;
	struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
	int ret;
	const struct of_device_id *match;

	if (!ci_pdata) {
		ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
		if (!ci_pdata)
			return -ENOMEM;
		*ci_pdata = ci_default_pdata;	/* struct copy */
	}

	match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
	if (match && match->data) {
		/* struct copy */
		*ci_pdata = *(struct ci_hdrc_platform_data *)match->data;
	}

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->clk = devm_clk_get_optional(dev, NULL);
	if (IS_ERR(priv->clk))
		return PTR_ERR(priv->clk);

	ret = clk_prepare_enable(priv->clk);
	if (ret) {
		dev_err(dev, "failed to enable the clock: %d\n", ret);
		return ret;
	}

	ci_pdata->name = dev_name(dev);

	priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
					   pdev->num_resources, ci_pdata);
	if (IS_ERR(priv->ci_pdev)) {
		ret = PTR_ERR(priv->ci_pdev);
		if (ret != -EPROBE_DEFER)
			dev_err(dev,
				"failed to register ci_hdrc platform device: %d\n",
				ret);
		goto clk_err;
	}

	platform_set_drvdata(pdev, priv);

	pm_runtime_no_callbacks(dev);
	pm_runtime_enable(dev);

	return 0;

clk_err:
	clk_disable_unprepare(priv->clk);
	return ret;
}

static int ci_hdrc_usb2_remove(struct platform_device *pdev)
{
	struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);

	pm_runtime_disable(&pdev->dev);
	ci_hdrc_remove_device(priv->ci_pdev);
	clk_disable_unprepare(priv->clk);

	return 0;
}

static struct platform_driver ci_hdrc_usb2_driver = {
	.probe	= ci_hdrc_usb2_probe,
	.remove	= ci_hdrc_usb2_remove,
	.driver	= {
		.name		= "chipidea-usb2",
		.of_match_table	= of_match_ptr(ci_hdrc_usb2_of_match),
	},
};
module_platform_driver(ci_hdrc_usb2_driver);

MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
5fd54ace	1	// SPDX-License-Identifier: GPL-2.0
10a062ce AT	2	/*
	3	* Copyright (C) 2014 Marvell Technology Group Ltd.
	4	*
	5	* Antoine Tenart <antoine.tenart@free-electrons.com>
10a062ce AT	6	*/
	7
	8	#include <linux/clk.h>
	9	#include <linux/dma-mapping.h>
	10	#include <linux/module.h>
	11	#include <linux/of.h>
84bc70f9	12	#include <linux/of_platform.h>
10a062ce AT	13	#include <linux/phy/phy.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/usb/chipidea.h>
	16	#include <linux/usb/hcd.h>
	17	#include <linux/usb/ulpi.h>
	18
	19	#include "ci.h"
	20
	21	struct ci_hdrc_usb2_priv {
	22	struct platform_device *ci_pdev;
	23	struct clk *clk;
	24	};
	25
d95699be	26	static const struct ci_hdrc_platform_data ci_default_pdata = {
10a062ce AT	27	.capoffset = DEF_CAPOFFSET,
	28	.flags = CI_HDRC_DISABLE_STREAMING,
	29	};
	30
fc228ef6	31	static const struct ci_hdrc_platform_data ci_zynq_pdata = {
84bc70f9	32	.capoffset = DEF_CAPOFFSET,
66d1c802	33	.flags = CI_HDRC_PHY_VBUS_CONTROL,
84bc70f9 NS	34	};
84bc70f9 NS	35
1c16f63d MM	36	static const struct ci_hdrc_platform_data ci_zevio_pdata = {
	37	.capoffset = DEF_CAPOFFSET,
	38	.flags = CI_HDRC_REGS_SHARED \| CI_HDRC_FORCE_FULLSPEED,
	39	};
	40
84bc70f9	41	static const struct of_device_id ci_hdrc_usb2_of_match[] = {
8b935270 MM	42	{ .compatible = "chipidea,usb2" },
8b935270 MM	43	{ .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata },
1c16f63d	44	{ .compatible = "lsi,zevio-usb", .data = &ci_zevio_pdata },
84bc70f9 NS	45	{ }
	46	};
	47	MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
	48
10a062ce AT	49	static int ci_hdrc_usb2_probe(struct platform_device *pdev)
	50	{
	51	struct device *dev = &pdev->dev;
	52	struct ci_hdrc_usb2_priv *priv;
	53	struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
	54	int ret;
84bc70f9	55	const struct of_device_id *match;
10a062ce	56
d95699be RH	57	if (!ci_pdata) {
d95699be RH	58	ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
49ca2eff CJ	59	if (!ci_pdata)
49ca2eff CJ	60	return -ENOMEM;
d95699be RH	61	ci_pdata = ci_default_pdata; / struct copy */
d95699be RH	62	}
10a062ce	63
84bc70f9 NS	64	match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
	65	if (match && match->data) {
	66	/* struct copy */
	67	ci_pdata = (struct ci_hdrc_platform_data *)match->data;
	68	}
	69
10a062ce AT	70	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	71	if (!priv)
	72	return -ENOMEM;
	73
c2de37b3 MM	74	priv->clk = devm_clk_get_optional(dev, NULL);
c2de37b3 MM	75	if (IS_ERR(priv->clk))
4ee2fc81	76	return PTR_ERR(priv->clk);
c2de37b3 MM	77
	78	ret = clk_prepare_enable(priv->clk);
	79	if (ret) {
	80	dev_err(dev, "failed to enable the clock: %d\n", ret);
	81	return ret;
10a062ce AT	82	}
10a062ce AT	83
10a062ce AT	84	ci_pdata->name = dev_name(dev);
	85
	86	priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
	87	pdev->num_resources, ci_pdata);
	88	if (IS_ERR(priv->ci_pdev)) {
	89	ret = PTR_ERR(priv->ci_pdev);
	90	if (ret != -EPROBE_DEFER)
	91	dev_err(dev,
	92	"failed to register ci_hdrc platform device: %d\n",
	93	ret);
	94	goto clk_err;
	95	}
	96
	97	platform_set_drvdata(pdev, priv);
	98
	99	pm_runtime_no_callbacks(dev);
	100	pm_runtime_enable(dev);
	101
	102	return 0;
	103
	104	clk_err:
c2de37b3	105	clk_disable_unprepare(priv->clk);
10a062ce AT	106	return ret;
	107	}
	108
	109	static int ci_hdrc_usb2_remove(struct platform_device *pdev)
	110	{
	111	struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
	112
	113	pm_runtime_disable(&pdev->dev);
	114	ci_hdrc_remove_device(priv->ci_pdev);
	115	clk_disable_unprepare(priv->clk);
	116
	117	return 0;
	118	}
	119
10a062ce AT	120	static struct platform_driver ci_hdrc_usb2_driver = {
	121	.probe = ci_hdrc_usb2_probe,
	122	.remove = ci_hdrc_usb2_remove,
	123	.driver = {
	124	.name = "chipidea-usb2",
10a062ce AT	125	.of_match_table = of_match_ptr(ci_hdrc_usb2_of_match),
	126	},
	127	};
	128	module_platform_driver(ci_hdrc_usb2_driver);
	129
	130	MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
	131	MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
	132	MODULE_LICENSE("GPL");