mirror of
https://github.com/AsahiLinux/u-boot
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b59e031a7d
phy-supply is now handled at uclass level. Remove it from the drivers that implement it at the driver level. Acked-by: Neil Armstrong <neil.armstrong@linaro.org> Suggested-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com>
171 lines
3.9 KiB
C
171 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Meson G12A USB2 PHY driver
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*
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* Copyright (C) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
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* Copyright (C) 2019 BayLibre, SAS
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* Author: Neil Armstrong <narmstron@baylibre.com>
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*/
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#include <common.h>
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#include <log.h>
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#include <malloc.h>
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#include <asm/io.h>
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#include <bitfield.h>
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#include <dm.h>
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#include <errno.h>
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#include <generic-phy.h>
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#include <regmap.h>
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#include <linux/delay.h>
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#include <power/regulator.h>
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#include <reset.h>
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#include <clk.h>
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#include <linux/bitops.h>
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#include <linux/compat.h>
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#define PHY_CTRL_R0 0x0
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#define PHY_CTRL_R1 0x4
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#define PHY_CTRL_R2 0x8
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#define PHY_CTRL_R3 0xc
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#define PHY_CTRL_R4 0x10
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#define PHY_CTRL_R5 0x14
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#define PHY_CTRL_R6 0x18
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#define PHY_CTRL_R7 0x1c
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#define PHY_CTRL_R8 0x20
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#define PHY_CTRL_R9 0x24
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#define PHY_CTRL_R10 0x28
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#define PHY_CTRL_R11 0x2c
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#define PHY_CTRL_R12 0x30
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#define PHY_CTRL_R13 0x34
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#define PHY_CTRL_R14 0x38
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#define PHY_CTRL_R15 0x3c
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#define PHY_CTRL_R16 0x40
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#define PHY_CTRL_R17 0x44
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#define PHY_CTRL_R18 0x48
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#define PHY_CTRL_R19 0x4c
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#define PHY_CTRL_R20 0x50
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#define PHY_CTRL_R21 0x54
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#define PHY_CTRL_R22 0x58
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#define PHY_CTRL_R23 0x5c
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#define RESET_COMPLETE_TIME 1000
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#define PLL_RESET_COMPLETE_TIME 100
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struct phy_meson_g12a_usb2_priv {
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struct regmap *regmap;
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#if CONFIG_IS_ENABLED(CLK)
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struct clk clk;
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#endif
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struct reset_ctl reset;
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};
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static int phy_meson_g12a_usb2_init(struct phy *phy)
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{
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struct udevice *dev = phy->dev;
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struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
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int ret;
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ret = reset_assert(&priv->reset);
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udelay(1);
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ret |= reset_deassert(&priv->reset);
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if (ret)
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return ret;
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udelay(RESET_COMPLETE_TIME);
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/* usb2_otg_aca_en == 0 */
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regmap_update_bits(priv->regmap, PHY_CTRL_R21, BIT(2), 0);
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/* PLL Setup : 24MHz * 20 / 1 = 480MHz */
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regmap_write(priv->regmap, PHY_CTRL_R16, 0x39400414);
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regmap_write(priv->regmap, PHY_CTRL_R17, 0x927e0000);
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regmap_write(priv->regmap, PHY_CTRL_R18, 0xac5f49e5);
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udelay(PLL_RESET_COMPLETE_TIME);
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/* UnReset PLL */
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regmap_write(priv->regmap, PHY_CTRL_R16, 0x19400414);
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/* PHY Tuning */
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regmap_write(priv->regmap, PHY_CTRL_R20, 0xfe18);
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regmap_write(priv->regmap, PHY_CTRL_R4, 0x8000fff);
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/* Tuning Disconnect Threshold */
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regmap_write(priv->regmap, PHY_CTRL_R3, 0x34);
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/* Analog Settings */
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regmap_write(priv->regmap, PHY_CTRL_R14, 0);
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regmap_write(priv->regmap, PHY_CTRL_R13, 0x78000);
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return 0;
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}
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static int phy_meson_g12a_usb2_exit(struct phy *phy)
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{
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struct udevice *dev = phy->dev;
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struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
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int ret;
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ret = reset_assert(&priv->reset);
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if (ret)
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return ret;
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return 0;
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}
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struct phy_ops meson_g12a_usb2_phy_ops = {
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.init = phy_meson_g12a_usb2_init,
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.exit = phy_meson_g12a_usb2_exit,
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};
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int meson_g12a_usb2_phy_probe(struct udevice *dev)
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{
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struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
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int ret;
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ret = regmap_init_mem(dev_ofnode(dev), &priv->regmap);
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if (ret)
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return ret;
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ret = reset_get_by_index(dev, 0, &priv->reset);
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if (ret == -ENOTSUPP)
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return 0;
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else if (ret)
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return ret;
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ret = reset_deassert(&priv->reset);
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if (ret) {
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reset_release_all(&priv->reset, 1);
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return ret;
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}
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#if CONFIG_IS_ENABLED(CLK)
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ret = clk_get_by_index(dev, 0, &priv->clk);
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if (ret < 0)
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return ret;
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ret = clk_enable(&priv->clk);
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if (ret && ret != -ENOSYS && ret != -ENOTSUPP) {
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pr_err("failed to enable PHY clock\n");
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clk_free(&priv->clk);
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return ret;
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}
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#endif
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return 0;
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}
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static const struct udevice_id meson_g12a_usb2_phy_ids[] = {
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{ .compatible = "amlogic,g12a-usb2-phy" },
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{ }
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};
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U_BOOT_DRIVER(meson_g12a_usb2_phy) = {
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.name = "meson_g12a_usb2_phy",
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.id = UCLASS_PHY,
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.of_match = meson_g12a_usb2_phy_ids,
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.probe = meson_g12a_usb2_phy_probe,
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.ops = &meson_g12a_usb2_phy_ops,
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.priv_auto = sizeof(struct phy_meson_g12a_usb2_priv),
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};
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