[linux-2.6-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 struct ci_hdrc_platform_data ci_zynq_pdata = {
	.capoffset	= DEF_CAPOFFSET,
};

static const struct of_device_id ci_hdrc_usb2_of_match[] = {
	{ .compatible = "chipidea,usb2"},
	{ .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_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(dev, NULL);
	if (!IS_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:
	if (!IS_ERR(priv->clk))
		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
84bc70f9 NS	31	static struct ci_hdrc_platform_data ci_zynq_pdata = {
	32	.capoffset = DEF_CAPOFFSET,
	33	};
	34
	35	static const struct of_device_id ci_hdrc_usb2_of_match[] = {
	36	{ .compatible = "chipidea,usb2"},
	37	{ .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata},
	38	{ }
	39	};
	40	MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
	41
10a062ce AT	42	static int ci_hdrc_usb2_probe(struct platform_device *pdev)
	43	{
	44	struct device *dev = &pdev->dev;
	45	struct ci_hdrc_usb2_priv *priv;
	46	struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
	47	int ret;
84bc70f9	48	const struct of_device_id *match;
10a062ce	49
d95699be RH	50	if (!ci_pdata) {
d95699be RH	51	ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
49ca2eff CJ	52	if (!ci_pdata)
49ca2eff CJ	53	return -ENOMEM;
d95699be RH	54	ci_pdata = ci_default_pdata; / struct copy */
d95699be RH	55	}
10a062ce	56
84bc70f9 NS	57	match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
	58	if (match && match->data) {
	59	/* struct copy */
	60	ci_pdata = (struct ci_hdrc_platform_data *)match->data;
	61	}
	62
10a062ce AT	63	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	64	if (!priv)
	65	return -ENOMEM;
	66
	67	priv->clk = devm_clk_get(dev, NULL);
	68	if (!IS_ERR(priv->clk)) {
	69	ret = clk_prepare_enable(priv->clk);
	70	if (ret) {
	71	dev_err(dev, "failed to enable the clock: %d\n", ret);
	72	return ret;
	73	}
	74	}
	75
10a062ce AT	76	ci_pdata->name = dev_name(dev);
	77
	78	priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
	79	pdev->num_resources, ci_pdata);
	80	if (IS_ERR(priv->ci_pdev)) {
	81	ret = PTR_ERR(priv->ci_pdev);
	82	if (ret != -EPROBE_DEFER)
	83	dev_err(dev,
	84	"failed to register ci_hdrc platform device: %d\n",
	85	ret);
	86	goto clk_err;
	87	}
	88
	89	platform_set_drvdata(pdev, priv);
	90
	91	pm_runtime_no_callbacks(dev);
	92	pm_runtime_enable(dev);
	93
	94	return 0;
	95
	96	clk_err:
	97	if (!IS_ERR(priv->clk))
	98	clk_disable_unprepare(priv->clk);
	99	return ret;
	100	}
	101
	102	static int ci_hdrc_usb2_remove(struct platform_device *pdev)
	103	{
	104	struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
	105
	106	pm_runtime_disable(&pdev->dev);
	107	ci_hdrc_remove_device(priv->ci_pdev);
	108	clk_disable_unprepare(priv->clk);
	109
	110	return 0;
	111	}
	112
10a062ce AT	113	static struct platform_driver ci_hdrc_usb2_driver = {
	114	.probe = ci_hdrc_usb2_probe,
	115	.remove = ci_hdrc_usb2_remove,
	116	.driver = {
	117	.name = "chipidea-usb2",
10a062ce AT	118	.of_match_table = of_match_ptr(ci_hdrc_usb2_of_match),
	119	},
	120	};
	121	module_platform_driver(ci_hdrc_usb2_driver);
	122
	123	MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
	124	MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
	125	MODULE_LICENSE("GPL");