[u-boot.git] / drivers / phy / bcm6348-usbh-phy.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2018 Álvaro Fernández Rojas <[email protected]>
 *
 * Derived from linux/arch/mips/bcm63xx/usb-common.c:
 *	Copyright 2008 Maxime Bizon <[email protected]>
 *	Copyright 2013 Florian Fainelli <[email protected]>
 */

#include <common.h>
#include <clk.h>
#include <dm.h>
#include <generic-phy.h>
#include <log.h>
#include <malloc.h>
#include <reset.h>
#include <asm/io.h>
#include <dm/device.h>
#include <linux/bitops.h>

#define USBH_SETUP_PORT1_EN	BIT(0)

struct bcm6348_usbh_priv {
	void __iomem *regs;
};

static int bcm6348_usbh_init(struct phy *phy)
{
	struct bcm6348_usbh_priv *priv = dev_get_priv(phy->dev);

	writel_be(USBH_SETUP_PORT1_EN, priv->regs);

	return 0;
}

static struct phy_ops bcm6348_usbh_ops = {
	.init = bcm6348_usbh_init,
};

static const struct udevice_id bcm6348_usbh_ids[] = {
	{ .compatible = "brcm,bcm6348-usbh" },
	{ /* sentinel */ }
};

static int bcm6348_usbh_probe(struct udevice *dev)
{
	struct bcm6348_usbh_priv *priv = dev_get_priv(dev);
	struct reset_ctl rst_ctl;
	struct clk clk;
	int ret;

	priv->regs = dev_remap_addr(dev);
	if (!priv->regs)
		return -EINVAL;

	/* enable usbh clock */
	ret = clk_get_by_name(dev, "usbh", &clk);
	if (ret < 0)
		return ret;

	ret = clk_enable(&clk);
	if (ret < 0)
		return ret;

	clk_free(&clk);

	/* perform reset */
	ret = reset_get_by_index(dev, 0, &rst_ctl);
	if (ret < 0)
		return ret;

	ret = reset_deassert(&rst_ctl);
	if (ret < 0)
		return ret;

	ret = reset_free(&rst_ctl);
	if (ret < 0)
		return ret;

	return 0;
}

U_BOOT_DRIVER(bcm6348_usbh) = {
	.name = "bcm6348-usbh",
	.id = UCLASS_PHY,
	.of_match = bcm6348_usbh_ids,
	.ops = &bcm6348_usbh_ops,
	.priv_auto	= sizeof(struct bcm6348_usbh_priv),
	.probe = bcm6348_usbh_probe,
};
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
bcb9b502	2	/*
50d16bcf	3	* Copyright (C) 2018 Álvaro Fernández Rojas <[email protected]>
bcb9b502 ÁFR	4	*
	5	* Derived from linux/arch/mips/bcm63xx/usb-common.c:
	6	* Copyright 2008 Maxime Bizon <[email protected]>
	7	* Copyright 2013 Florian Fainelli <[email protected]>
bcb9b502 ÁFR	8	*/
	9
	10	#include <common.h>
	11	#include <clk.h>
	12	#include <dm.h>
	13	#include <generic-phy.h>
f7ae49fc	14	#include <log.h>
336d4615	15	#include <malloc.h>
bcb9b502 ÁFR	16	#include <reset.h>
	17	#include <asm/io.h>
	18	#include <dm/device.h>
cd93d625	19	#include <linux/bitops.h>
bcb9b502 ÁFR	20
	21	#define USBH_SETUP_PORT1_EN BIT(0)
	22
	23	struct bcm6348_usbh_priv {
	24	void __iomem *regs;
	25	};
	26
	27	static int bcm6348_usbh_init(struct phy *phy)
	28	{
	29	struct bcm6348_usbh_priv *priv = dev_get_priv(phy->dev);
	30
	31	writel_be(USBH_SETUP_PORT1_EN, priv->regs);
	32
	33	return 0;
	34	}
	35
	36	static struct phy_ops bcm6348_usbh_ops = {
	37	.init = bcm6348_usbh_init,
	38	};
	39
	40	static const struct udevice_id bcm6348_usbh_ids[] = {
	41	{ .compatible = "brcm,bcm6348-usbh" },
	42	{ /* sentinel */ }
	43	};
	44
	45	static int bcm6348_usbh_probe(struct udevice *dev)
	46	{
	47	struct bcm6348_usbh_priv *priv = dev_get_priv(dev);
	48	struct reset_ctl rst_ctl;
	49	struct clk clk;
bcb9b502 ÁFR	50	int ret;
bcb9b502 ÁFR	51
50d16bcf ÁFR	52	priv->regs = dev_remap_addr(dev);
50d16bcf ÁFR	53	if (!priv->regs)
bcb9b502 ÁFR	54	return -EINVAL;
bcb9b502 ÁFR	55
bcb9b502 ÁFR	56	/* enable usbh clock */
	57	ret = clk_get_by_name(dev, "usbh", &clk);
	58	if (ret < 0)
	59	return ret;
	60
	61	ret = clk_enable(&clk);
	62	if (ret < 0)
	63	return ret;
	64
ad20358c	65	clk_free(&clk);
bcb9b502 ÁFR	66
	67	/* perform reset */
	68	ret = reset_get_by_index(dev, 0, &rst_ctl);
	69	if (ret < 0)
	70	return ret;
	71
	72	ret = reset_deassert(&rst_ctl);
	73	if (ret < 0)
	74	return ret;
	75
	76	ret = reset_free(&rst_ctl);
	77	if (ret < 0)
	78	return ret;
	79
	80	return 0;
	81	}
	82
	83	U_BOOT_DRIVER(bcm6348_usbh) = {
	84	.name = "bcm6348-usbh",
	85	.id = UCLASS_PHY,
	86	.of_match = bcm6348_usbh_ids,
	87	.ops = &bcm6348_usbh_ops,
41575d8e	88	.priv_auto = sizeof(struct bcm6348_usbh_priv),
bcb9b502 ÁFR	89	.probe = bcm6348_usbh_probe,
bcb9b502 ÁFR	90	};