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Release 4.10 drivers/phy/phy-hi6220-usb.c

Directory: drivers/phy
/*
 * Copyright (c) 2015 Linaro Ltd.
 * Copyright (c) 2015 Hisilicon Limited.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/phy/phy.h>
#include <linux/regmap.h>


#define SC_PERIPH_CTRL4			0x00c


#define CTRL4_PICO_SIDDQ		BIT(6)

#define CTRL4_PICO_OGDISABLE		BIT(8)

#define CTRL4_PICO_VBUSVLDEXT		BIT(10)

#define CTRL4_PICO_VBUSVLDEXTSEL	BIT(11)

#define CTRL4_OTG_PHY_SEL		BIT(21)


#define SC_PERIPH_CTRL5			0x010


#define CTRL5_USBOTG_RES_SEL		BIT(3)

#define CTRL5_PICOPHY_ACAENB		BIT(4)

#define CTRL5_PICOPHY_BC_MODE		BIT(5)

#define CTRL5_PICOPHY_CHRGSEL		BIT(6)

#define CTRL5_PICOPHY_VDATSRCEND	BIT(7)

#define CTRL5_PICOPHY_VDATDETENB	BIT(8)

#define CTRL5_PICOPHY_DCDENB		BIT(9)

#define CTRL5_PICOPHY_IDDIG		BIT(10)


#define SC_PERIPH_CTRL8			0x018

#define SC_PERIPH_RSTEN0		0x300

#define SC_PERIPH_RSTDIS0		0x304


#define RST0_USBOTG_BUS			BIT(4)

#define RST0_POR_PICOPHY		BIT(5)

#define RST0_USBOTG			BIT(6)

#define RST0_USBOTG_32K			BIT(7)


#define EYE_PATTERN_PARA		0x7053348c


struct hi6220_priv {
	
struct regmap *reg;
	
struct device *dev;
};


static void hi6220_phy_init(struct hi6220_priv *priv) { struct regmap *reg = priv->reg; u32 val, mask; val = RST0_USBOTG_BUS | RST0_POR_PICOPHY | RST0_USBOTG | RST0_USBOTG_32K; mask = val; regmap_update_bits(reg, SC_PERIPH_RSTEN0, mask, val); regmap_update_bits(reg, SC_PERIPH_RSTDIS0, mask, val); }

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static int hi6220_phy_setup(struct hi6220_priv *priv, bool on) { struct regmap *reg = priv->reg; u32 val, mask; int ret; if (on) { val = CTRL5_USBOTG_RES_SEL | CTRL5_PICOPHY_ACAENB; mask = val | CTRL5_PICOPHY_BC_MODE; ret = regmap_update_bits(reg, SC_PERIPH_CTRL5, mask, val); if (ret) goto out; val = CTRL4_PICO_VBUSVLDEXT | CTRL4_PICO_VBUSVLDEXTSEL | CTRL4_OTG_PHY_SEL; mask = val | CTRL4_PICO_SIDDQ | CTRL4_PICO_OGDISABLE; ret = regmap_update_bits(reg, SC_PERIPH_CTRL4, mask, val); if (ret) goto out; ret = regmap_write(reg, SC_PERIPH_CTRL8, EYE_PATTERN_PARA); if (ret) goto out; } else { val = CTRL4_PICO_SIDDQ; mask = val; ret = regmap_update_bits(reg, SC_PERIPH_CTRL4, mask, val); if (ret) goto out; } return 0; out: dev_err(priv->dev, "failed to setup phy ret: %d\n", ret); return ret; }

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static int hi6220_phy_start(struct phy *phy) { struct hi6220_priv *priv = phy_get_drvdata(phy); return hi6220_phy_setup(priv, true); }

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static int hi6220_phy_exit(struct phy *phy) { struct hi6220_priv *priv = phy_get_drvdata(phy); return hi6220_phy_setup(priv, false); }

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static struct phy_ops hi6220_phy_ops = { .init = hi6220_phy_start, .exit = hi6220_phy_exit, .owner = THIS_MODULE, };
static int hi6220_phy_probe(struct platform_device *pdev) { struct phy_provider *phy_provider; struct device *dev = &pdev->dev; struct phy *phy; struct hi6220_priv *priv; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->dev = dev; priv->reg = syscon_regmap_lookup_by_phandle(dev->of_node, "hisilicon,peripheral-syscon"); if (IS_ERR(priv->reg)) { dev_err(dev, "no hisilicon,peripheral-syscon\n"); return PTR_ERR(priv->reg); } hi6220_phy_init(priv); phy = devm_phy_create(dev, NULL, &hi6220_phy_ops); if (IS_ERR(phy)) return PTR_ERR(phy); phy_set_drvdata(phy, priv); phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); return PTR_ERR_OR_ZERO(phy_provider); }

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static const struct of_device_id hi6220_phy_of_match[] = { {.compatible = "hisilicon,hi6220-usb-phy",}, { }, }; MODULE_DEVICE_TABLE(of, hi6220_phy_of_match); static struct platform_driver hi6220_phy_driver = { .probe = hi6220_phy_probe, .driver = { .name = "hi6220-usb-phy", .of_match_table = hi6220_phy_of_match, } }; module_platform_driver(hi6220_phy_driver); MODULE_DESCRIPTION("HISILICON HI6220 USB PHY driver"); MODULE_ALIAS("platform:hi6220-usb-phy"); MODULE_LICENSE("GPL");

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Directory: drivers/phy
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