[u-boot.git] / drivers / phy / bcm6368-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 <power-domain.h>
#include <reset.h>
#include <asm/io.h>
#include <dm/device.h>
#include <linux/bitops.h>
#include <linux/delay.h>

/* USBH PLL Control register */
#define USBH_PLL_REG		0x18
#define USBH_PLL_IDDQ_PWRDN	BIT(9)
#define USBH_PLL_PWRDN_DELAY	BIT(10)

/* USBH Swap Control register */
#define USBH_SWAP_REG		0x1c
#define USBH_SWAP_OHCI_DATA	BIT(0)
#define USBH_SWAP_OHCI_ENDIAN	BIT(1)
#define USBH_SWAP_EHCI_DATA	BIT(3)
#define USBH_SWAP_EHCI_ENDIAN	BIT(4)

/* USBH Setup register */
#define USBH_SETUP_REG		0x28
#define USBH_SETUP_IOC		BIT(4)
#define USBH_SETUP_IPP		BIT(5)

struct bcm6368_usbh_hw {
	uint32_t setup_clr;
	uint32_t pll_clr;
};

struct bcm6368_usbh_priv {
	const struct bcm6368_usbh_hw *hw;
	void __iomem *regs;
};

static int bcm6368_usbh_init(struct phy *phy)
{
	struct bcm6368_usbh_priv *priv = dev_get_priv(phy->dev);
	const struct bcm6368_usbh_hw *hw = priv->hw;

	/* configure to work in native cpu endian */
	clrsetbits_be32(priv->regs + USBH_SWAP_REG,
			USBH_SWAP_EHCI_ENDIAN | USBH_SWAP_OHCI_ENDIAN,
			USBH_SWAP_EHCI_DATA | USBH_SWAP_OHCI_DATA);

	/* setup config */
	if (hw->setup_clr)
		clrbits_be32(priv->regs + USBH_SETUP_REG, hw->setup_clr);

	setbits_be32(priv->regs + USBH_SETUP_REG, USBH_SETUP_IOC);

	/* enable pll control */
	if (hw->pll_clr)
		clrbits_be32(priv->regs + USBH_PLL_REG, hw->pll_clr);

	return 0;
}

static struct phy_ops bcm6368_usbh_ops = {
	.init = bcm6368_usbh_init,
};

static const struct bcm6368_usbh_hw bcm6328_hw = {
	.pll_clr = USBH_PLL_IDDQ_PWRDN | USBH_PLL_PWRDN_DELAY,
	.setup_clr = 0,
};

static const struct bcm6368_usbh_hw bcm6362_hw = {
	.pll_clr = 0,
	.setup_clr = 0,
};

static const struct bcm6368_usbh_hw bcm6368_hw = {
	.pll_clr = 0,
	.setup_clr = 0,
};

static const struct bcm6368_usbh_hw bcm63268_hw = {
	.pll_clr = USBH_PLL_IDDQ_PWRDN | USBH_PLL_PWRDN_DELAY,
	.setup_clr = USBH_SETUP_IPP,
};

static const struct udevice_id bcm6368_usbh_ids[] = {
	{
		.compatible = "brcm,bcm6328-usbh",
		.data = (ulong)&bcm6328_hw,
	}, {
		.compatible = "brcm,bcm6362-usbh",
		.data = (ulong)&bcm6362_hw,
	}, {
		.compatible = "brcm,bcm6368-usbh",
		.data = (ulong)&bcm6368_hw,
	}, {
		.compatible = "brcm,bcm63268-usbh",
		.data = (ulong)&bcm63268_hw,
	}, { /* sentinel */ }
};

static int bcm6368_usbh_probe(struct udevice *dev)
{
	struct bcm6368_usbh_priv *priv = dev_get_priv(dev);
	const struct bcm6368_usbh_hw *hw =
		(const struct bcm6368_usbh_hw *)dev_get_driver_data(dev);
#if defined(CONFIG_POWER_DOMAIN)
	struct power_domain pwr_dom;
#endif
	struct reset_ctl rst_ctl;
	struct clk clk;
	int ret;

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

	priv->hw = hw;

	/* 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);

#if defined(CONFIG_POWER_DOMAIN)
	/* enable power domain */
	ret = power_domain_get(dev, &pwr_dom);
	if (ret < 0)
		return ret;

	ret = power_domain_on(&pwr_dom);
	if (ret < 0)
		return ret;

	ret = power_domain_free(&pwr_dom);
	if (ret < 0)
		return ret;
#endif

	/* 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;

	/* enable usb_ref clock */
	ret = clk_get_by_name(dev, "usb_ref", &clk);
	if (!ret) {
		ret = clk_enable(&clk);
		if (ret < 0)
			return ret;

		clk_free(&clk);
	}

	mdelay(100);

	return 0;
}

U_BOOT_DRIVER(bcm6368_usbh) = {
	.name = "bcm6368-usbh",
	.id = UCLASS_PHY,
	.of_match = bcm6368_usbh_ids,
	.ops = &bcm6368_usbh_ops,
	.priv_auto	= sizeof(struct bcm6368_usbh_priv),
	.probe = bcm6368_usbh_probe,
};
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
f55c1538	2	/*
25d8380f	3	* Copyright (C) 2018 Álvaro Fernández Rojas <[email protected]>
f55c1538 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]>
f55c1538 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>
f55c1538 ÁFR	16	#include <power-domain.h>
	17	#include <reset.h>
	18	#include <asm/io.h>
	19	#include <dm/device.h>
cd93d625	20	#include <linux/bitops.h>
c05ed00a	21	#include <linux/delay.h>
f55c1538 ÁFR	22
	23	/* USBH PLL Control register */
	24	#define USBH_PLL_REG 0x18
	25	#define USBH_PLL_IDDQ_PWRDN BIT(9)
	26	#define USBH_PLL_PWRDN_DELAY BIT(10)
	27
	28	/* USBH Swap Control register */
	29	#define USBH_SWAP_REG 0x1c
	30	#define USBH_SWAP_OHCI_DATA BIT(0)
	31	#define USBH_SWAP_OHCI_ENDIAN BIT(1)
	32	#define USBH_SWAP_EHCI_DATA BIT(3)
	33	#define USBH_SWAP_EHCI_ENDIAN BIT(4)
	34
	35	/* USBH Setup register */
	36	#define USBH_SETUP_REG 0x28
	37	#define USBH_SETUP_IOC BIT(4)
	38	#define USBH_SETUP_IPP BIT(5)
	39
	40	struct bcm6368_usbh_hw {
	41	uint32_t setup_clr;
	42	uint32_t pll_clr;
	43	};
	44
	45	struct bcm6368_usbh_priv {
	46	const struct bcm6368_usbh_hw *hw;
	47	void __iomem *regs;
	48	};
	49
	50	static int bcm6368_usbh_init(struct phy *phy)
	51	{
	52	struct bcm6368_usbh_priv *priv = dev_get_priv(phy->dev);
	53	const struct bcm6368_usbh_hw *hw = priv->hw;
	54
	55	/* configure to work in native cpu endian */
	56	clrsetbits_be32(priv->regs + USBH_SWAP_REG,
	57	USBH_SWAP_EHCI_ENDIAN \| USBH_SWAP_OHCI_ENDIAN,
	58	USBH_SWAP_EHCI_DATA \| USBH_SWAP_OHCI_DATA);
	59
	60	/* setup config */
	61	if (hw->setup_clr)
	62	clrbits_be32(priv->regs + USBH_SETUP_REG, hw->setup_clr);
	63
	64	setbits_be32(priv->regs + USBH_SETUP_REG, USBH_SETUP_IOC);
	65
	66	/* enable pll control */
	67	if (hw->pll_clr)
	68	clrbits_be32(priv->regs + USBH_PLL_REG, hw->pll_clr);
	69
	70	return 0;
	71	}
	72
	73	static struct phy_ops bcm6368_usbh_ops = {
	74	.init = bcm6368_usbh_init,
	75	};
	76
	77	static const struct bcm6368_usbh_hw bcm6328_hw = {
	78	.pll_clr = USBH_PLL_IDDQ_PWRDN \| USBH_PLL_PWRDN_DELAY,
	79	.setup_clr = 0,
	80	};
	81
	82	static const struct bcm6368_usbh_hw bcm6362_hw = {
	83	.pll_clr = 0,
	84	.setup_clr = 0,
	85	};
86
87	static const struct bcm6368_usbh_hw bcm6368_hw = {
88	.pll_clr = 0,
89	.setup_clr = 0,
90	};
91
92	static const struct bcm6368_usbh_hw bcm63268_hw = {
93	.pll_clr = USBH_PLL_IDDQ_PWRDN \| USBH_PLL_PWRDN_DELAY,
94	.setup_clr = USBH_SETUP_IPP,
95	};
96
97	static const struct udevice_id bcm6368_usbh_ids[] = {
98	{
99	.compatible = "brcm,bcm6328-usbh",
100	.data = (ulong)&bcm6328_hw,
101	}, {
102	.compatible = "brcm,bcm6362-usbh",
103	.data = (ulong)&bcm6362_hw,
104	}, {
105	.compatible = "brcm,bcm6368-usbh",
106	.data = (ulong)&bcm6368_hw,
107	}, {
108	.compatible = "brcm,bcm63268-usbh",
109	.data = (ulong)&bcm63268_hw,
110	}, { /* sentinel */ }
111	};
112
113	static int bcm6368_usbh_probe(struct udevice *dev)
114	{
115	struct bcm6368_usbh_priv *priv = dev_get_priv(dev);
116	const struct bcm6368_usbh_hw *hw =
117	(const struct bcm6368_usbh_hw *)dev_get_driver_data(dev);
118	#if defined(CONFIG_POWER_DOMAIN)
119	struct power_domain pwr_dom;
120	#endif
121	struct reset_ctl rst_ctl;
122	struct clk clk;
f55c1538 ÁFR	123	int ret;
f55c1538 ÁFR	124
25d8380f ÁFR	125	priv->regs = dev_remap_addr(dev);
25d8380f ÁFR	126	if (!priv->regs)
f55c1538 ÁFR	127	return -EINVAL;
f55c1538 ÁFR	128
f55c1538 ÁFR	129	priv->hw = hw;
	130
	131	/* enable usbh clock */
	132	ret = clk_get_by_name(dev, "usbh", &clk);
	133	if (ret < 0)
	134	return ret;
	135
	136	ret = clk_enable(&clk);
	137	if (ret < 0)
	138	return ret;
	139
ad20358c	140	clk_free(&clk);
f55c1538 ÁFR	141
	142	#if defined(CONFIG_POWER_DOMAIN)
	143	/* enable power domain */
	144	ret = power_domain_get(dev, &pwr_dom);
	145	if (ret < 0)
	146	return ret;
	147
	148	ret = power_domain_on(&pwr_dom);
	149	if (ret < 0)
	150	return ret;
	151
	152	ret = power_domain_free(&pwr_dom);
	153	if (ret < 0)
	154	return ret;
	155	#endif
	156
	157	/* perform reset */
	158	ret = reset_get_by_index(dev, 0, &rst_ctl);
	159	if (ret < 0)
	160	return ret;
	161
	162	ret = reset_deassert(&rst_ctl);
	163	if (ret < 0)
	164	return ret;
	165
	166	ret = reset_free(&rst_ctl);
	167	if (ret < 0)
	168	return ret;
	169
	170	/* enable usb_ref clock */
	171	ret = clk_get_by_name(dev, "usb_ref", &clk);
	172	if (!ret) {
	173	ret = clk_enable(&clk);
	174	if (ret < 0)
	175	return ret;
	176
ad20358c	177	clk_free(&clk);
f55c1538 ÁFR	178	}
	179
	180	mdelay(100);
	181
	182	return 0;
	183	}
	184
	185	U_BOOT_DRIVER(bcm6368_usbh) = {
	186	.name = "bcm6368-usbh",
	187	.id = UCLASS_PHY,
	188	.of_match = bcm6368_usbh_ids,
	189	.ops = &bcm6368_usbh_ops,
41575d8e	190	.priv_auto = sizeof(struct bcm6368_usbh_priv),
f55c1538 ÁFR	191	.probe = bcm6368_usbh_probe,
f55c1538 ÁFR	192	};