165 lines
3.9 KiB
C
165 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2015 Linaro Ltd.
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* Copyright (c) 2015 Hisilicon Limited.
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*/
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#include <linux/mfd/syscon.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/phy/phy.h>
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#include <linux/regmap.h>
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#define SC_PERIPH_CTRL4 0x00c
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#define CTRL4_PICO_SIDDQ BIT(6)
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#define CTRL4_PICO_OGDISABLE BIT(8)
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#define CTRL4_PICO_VBUSVLDEXT BIT(10)
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#define CTRL4_PICO_VBUSVLDEXTSEL BIT(11)
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#define CTRL4_OTG_PHY_SEL BIT(21)
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#define SC_PERIPH_CTRL5 0x010
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#define CTRL5_USBOTG_RES_SEL BIT(3)
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#define CTRL5_PICOPHY_ACAENB BIT(4)
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#define CTRL5_PICOPHY_BC_MODE BIT(5)
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#define CTRL5_PICOPHY_CHRGSEL BIT(6)
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#define CTRL5_PICOPHY_VDATSRCEND BIT(7)
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#define CTRL5_PICOPHY_VDATDETENB BIT(8)
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#define CTRL5_PICOPHY_DCDENB BIT(9)
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#define CTRL5_PICOPHY_IDDIG BIT(10)
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#define SC_PERIPH_CTRL8 0x018
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#define SC_PERIPH_RSTEN0 0x300
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#define SC_PERIPH_RSTDIS0 0x304
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#define RST0_USBOTG_BUS BIT(4)
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#define RST0_POR_PICOPHY BIT(5)
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#define RST0_USBOTG BIT(6)
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#define RST0_USBOTG_32K BIT(7)
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#define EYE_PATTERN_PARA 0x7053348c
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struct hi6220_priv {
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struct regmap *reg;
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struct device *dev;
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};
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static void hi6220_phy_init(struct hi6220_priv *priv)
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{
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struct regmap *reg = priv->reg;
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u32 val, mask;
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val = RST0_USBOTG_BUS | RST0_POR_PICOPHY |
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RST0_USBOTG | RST0_USBOTG_32K;
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mask = val;
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regmap_update_bits(reg, SC_PERIPH_RSTEN0, mask, val);
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regmap_update_bits(reg, SC_PERIPH_RSTDIS0, mask, val);
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}
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static int hi6220_phy_setup(struct hi6220_priv *priv, bool on)
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{
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struct regmap *reg = priv->reg;
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u32 val, mask;
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int ret;
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if (on) {
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val = CTRL5_USBOTG_RES_SEL | CTRL5_PICOPHY_ACAENB;
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mask = val | CTRL5_PICOPHY_BC_MODE;
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ret = regmap_update_bits(reg, SC_PERIPH_CTRL5, mask, val);
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if (ret)
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goto out;
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val = CTRL4_PICO_VBUSVLDEXT | CTRL4_PICO_VBUSVLDEXTSEL |
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CTRL4_OTG_PHY_SEL;
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mask = val | CTRL4_PICO_SIDDQ | CTRL4_PICO_OGDISABLE;
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ret = regmap_update_bits(reg, SC_PERIPH_CTRL4, mask, val);
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if (ret)
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goto out;
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ret = regmap_write(reg, SC_PERIPH_CTRL8, EYE_PATTERN_PARA);
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if (ret)
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goto out;
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} else {
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val = CTRL4_PICO_SIDDQ;
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mask = val;
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ret = regmap_update_bits(reg, SC_PERIPH_CTRL4, mask, val);
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if (ret)
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goto out;
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}
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return 0;
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out:
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dev_err(priv->dev, "failed to setup phy ret: %d\n", ret);
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return ret;
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}
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static int hi6220_phy_start(struct phy *phy)
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{
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struct hi6220_priv *priv = phy_get_drvdata(phy);
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return hi6220_phy_setup(priv, true);
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}
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static int hi6220_phy_exit(struct phy *phy)
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{
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struct hi6220_priv *priv = phy_get_drvdata(phy);
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return hi6220_phy_setup(priv, false);
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}
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static const struct phy_ops hi6220_phy_ops = {
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.init = hi6220_phy_start,
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.exit = hi6220_phy_exit,
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.owner = THIS_MODULE,
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};
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static int hi6220_phy_probe(struct platform_device *pdev)
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{
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struct phy_provider *phy_provider;
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struct device *dev = &pdev->dev;
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struct phy *phy;
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struct hi6220_priv *priv;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->dev = dev;
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priv->reg = syscon_regmap_lookup_by_phandle(dev->of_node,
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"hisilicon,peripheral-syscon");
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if (IS_ERR(priv->reg)) {
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dev_err(dev, "no hisilicon,peripheral-syscon\n");
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return PTR_ERR(priv->reg);
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}
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hi6220_phy_init(priv);
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phy = devm_phy_create(dev, NULL, &hi6220_phy_ops);
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if (IS_ERR(phy))
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return PTR_ERR(phy);
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phy_set_drvdata(phy, priv);
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phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
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return PTR_ERR_OR_ZERO(phy_provider);
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}
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static const struct of_device_id hi6220_phy_of_match[] = {
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{.compatible = "hisilicon,hi6220-usb-phy",},
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{ },
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};
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MODULE_DEVICE_TABLE(of, hi6220_phy_of_match);
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static struct platform_driver hi6220_phy_driver = {
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.probe = hi6220_phy_probe,
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.driver = {
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.name = "hi6220-usb-phy",
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.of_match_table = hi6220_phy_of_match,
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}
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};
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module_platform_driver(hi6220_phy_driver);
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MODULE_DESCRIPTION("HISILICON HI6220 USB PHY driver");
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MODULE_ALIAS("platform:hi6220-usb-phy");
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MODULE_LICENSE("GPL");
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