// SPDX-License-Identifier: GPL-2.0+
/*
* Meson G12A USB2 PHY driver
*
* Copyright (C) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
* Copyright (C) 2019 BayLibre, SAS
* Author: Neil Armstrong <narmstron@baylibre.com>
*/
#include <log.h>
#include <malloc.h>
#include <asm/io.h>
#include <bitfield.h>
#include <dm.h>
#include <errno.h>
#include <generic-phy.h>
#include <regmap.h>
#include <linux/delay.h>
#include <linux/printk.h>
#include <power/regulator.h>
#include <power-domain.h>
#include <reset.h>
#include <clk.h>
#include <linux/bitops.h>
#include <linux/compat.h>
#include <linux/bitfield.h>
#define PHY_CTRL_R0 0x0
#define PHY_CTRL_R1 0x4
#define PHY_CTRL_R2 0x8
#define PHY_CTRL_R3 0xc
#define PHY_CTRL_R3_SQUELCH_REF GENMASK(1, 0)
#define PHY_CTRL_R3_HSDIC_REF GENMASK(3, 2)
#define PHY_CTRL_R3_DISC_THRESH GENMASK(7, 4)
#define PHY_CTRL_R4 0x10
#define PHY_CTRL_R4_CALIB_CODE_7_0 GENMASK(7, 0)
#define PHY_CTRL_R4_CALIB_CODE_15_8 GENMASK(15, 8)
#define PHY_CTRL_R4_CALIB_CODE_23_16 GENMASK(23, 16)
#define PHY_CTRL_R4_I_C2L_CAL_EN BIT(24)
#define PHY_CTRL_R4_I_C2L_CAL_RESET_N BIT(25)
#define PHY_CTRL_R4_I_C2L_CAL_DONE BIT(26)
#define PHY_CTRL_R4_TEST_BYPASS_MODE_EN BIT(27)
#define PHY_CTRL_R4_I_C2L_BIAS_TRIM_1_0 GENMASK(29, 28)
#define PHY_CTRL_R4_I_C2L_BIAS_TRIM_3_2 GENMASK(31, 30)
#define PHY_CTRL_R5 0x14
#define PHY_CTRL_R6 0x18
#define PHY_CTRL_R7 0x1c
#define PHY_CTRL_R8 0x20
#define PHY_CTRL_R9 0x24
#define PHY_CTRL_R10 0x28
#define PHY_CTRL_R11 0x2c
#define PHY_CTRL_R12 0x30
#define PHY_CTRL_R13 0x34
#define PHY_CTRL_R13_CUSTOM_PATTERN_19 GENMASK(7, 0)
#define PHY_CTRL_R13_LOAD_STAT BIT(14)
#define PHY_CTRL_R13_UPDATE_PMA_SIGNALS BIT(15)
#define PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET GENMASK(20, 16)
#define PHY_CTRL_R13_CLEAR_HOLD_HS_DISCONNECT BIT(21)
#define PHY_CTRL_R13_BYPASS_HOST_DISCONNECT_VAL BIT(22)
#define PHY_CTRL_R13_BYPASS_HOST_DISCONNECT_EN BIT(23)
#define PHY_CTRL_R13_I_C2L_HS_EN BIT(24)
#define PHY_CTRL_R13_I_C2L_FS_EN BIT(25)
#define PHY_CTRL_R13_I_C2L_LS_EN BIT(26)
#define PHY_CTRL_R13_I_C2L_HS_OE BIT(27)
#define PHY_CTRL_R13_I_C2L_FS_OE BIT(28)
#define PHY_CTRL_R13_I_C2L_HS_RX_EN BIT(29)
#define PHY_CTRL_R13_I_C2L_FSLS_RX_EN BIT(30)
#define PHY_CTRL_R14 0x38
#define PHY_CTRL_R15 0x3c
#define PHY_CTRL_R16 0x40
#define PHY_CTRL_R16_MPLL_M GENMASK(8, 0)
#define PHY_CTRL_R16_MPLL_N GENMASK(14, 10)
#define PHY_CTRL_R16_MPLL_TDC_MODE BIT(20)
#define PHY_CTRL_R16_MPLL_SDM_EN BIT(21)
#define PHY_CTRL_R16_MPLL_LOAD BIT(22)
#define PHY_CTRL_R16_MPLL_DCO_SDM_EN BIT(23)
#define PHY_CTRL_R16_MPLL_LOCK_LONG GENMASK(25, 24)
#define PHY_CTRL_R16_MPLL_LOCK_F BIT(26)
#define PHY_CTRL_R16_MPLL_FAST_LOCK BIT(27)
#define PHY_CTRL_R16_MPLL_EN BIT(28)
#define PHY_CTRL_R16_MPLL_RESET BIT(29)
#define PHY_CTRL_R16_MPLL_LOCK BIT(30)
#define PHY_CTRL_R16_MPLL_LOCK_DIG BIT(31)
#define PHY_CTRL_R17 0x44
#define PHY_CTRL_R17_MPLL_FRAC_IN GENMASK(13, 0)
#define PHY_CTRL_R17_MPLL_FIX_EN BIT(16)
#define PHY_CTRL_R17_MPLL_LAMBDA1 GENMASK(19, 17)
#define PHY_CTRL_R17_MPLL_LAMBDA0 GENMASK(22, 20)
#define PHY_CTRL_R17_MPLL_FILTER_MODE BIT(23)
#define PHY_CTRL_R17_MPLL_FILTER_PVT2 GENMASK(27, 24)
#define PHY_CTRL_R17_MPLL_FILTER_PVT1 GENMASK(31, 28)
#define PHY_CTRL_R18 0x48
#define PHY_CTRL_R18_MPLL_LKW_SEL GENMASK(1, 0)
#define PHY_CTRL_R18_MPLL_LK_W GENMASK(5, 2)
#define PHY_CTRL_R18_MPLL_LK_S GENMASK(11, 6)
#define PHY_CTRL_R18_MPLL_DCO_M_EN BIT(12)
#define PHY_CTRL_R18_MPLL_DCO_CLK_SEL BIT(13)
#define PHY_CTRL_R18_MPLL_PFD_GAIN GENMASK(15, 14)
#define PHY_CTRL_R18_MPLL_ROU GENMASK(18, 16)
#define PHY_CTRL_R18_MPLL_DATA_SEL GENMASK(21, 19)
#define PHY_CTRL_R18_MPLL_BIAS_ADJ GENMASK(23, 22)
#define PHY_CTRL_R18_MPLL_BB_MODE GENMASK(25, 24)
#define PHY_CTRL_R18_MPLL_ALPHA GENMASK(28, 26)
#define PHY_CTRL_R18_MPLL_ADJ_LDO GENMASK(30, 29)
#define PHY_CTRL_R18_MPLL_ACG_RANGE BIT(31)
#define PHY_CTRL_R19 0x4c
#define PHY_CTRL_R20 0x50
#define PHY_CTRL_R20_USB2_IDDET_EN BIT(0)
#define PHY_CTRL_R20_USB2_OTG_VBUS_TRIM_2_0 GENMASK(3, 1)
#define PHY_CTRL_R20_USB2_OTG_VBUSDET_EN BIT(4)
#define PHY_CTRL_R20_USB2_AMON_EN BIT(5)
#define PHY_CTRL_R20_USB2_CAL_CODE_R5 BIT(6)
#define PHY_CTRL_R20_BYPASS_OTG_DET BIT(7)
#define PHY_CTRL_R20_USB2_DMON_EN BIT(8)
#define PHY_CTRL_R20_USB2_DMON_SEL_3_0 GENMASK(12, 9)
#define PHY_CTRL_R20_USB2_EDGE_DRV_EN BIT(13)
#define PHY_CTRL_R20_USB2_EDGE_DRV_TRIM_1_0 GENMASK(15, 14)
#define PHY_CTRL_R20_USB2_BGR_ADJ_4_0 GENMASK(20, 16)
#define PHY_CTRL_R20_USB2_BGR_START BIT(21)
#define PHY_CTRL_R20_USB2_BGR_VREF_4_0 GENMASK(28, 24)
#define PHY_CTRL_R20_USB2_BGR_DBG_1_0 GENMASK(30, 29)
#define PHY_CTRL_R20_BYPASS_CAL_DONE_R5 BIT(31)
#define PHY_CTRL_R21 0x54
#define PHY_CTRL_R21_USB2_BGR_FORCE BIT(0)
#define PHY_CTRL_R21_USB2_CAL_ACK_EN BIT(1)
#define PHY_CTRL_R21_USB2_OTG_ACA_EN BIT(2)
#define PHY_CTRL_R21_USB2_TX_STRG_PD BIT(3)
#define PHY_CTRL_R21_USB2_OTG_ACA_TRIM_1_0 GENMASK(5, 4)
#define PHY_CTRL_R21_BYPASS_UTMI_CNTR GENMASK(15, 6)
#define PHY_CTRL_R21_BYPASS_UTMI_REG GENMASK(25, 20)
#define PHY_CTRL_R22 0x58
#define PHY_CTRL_R23 0x5c
#define RESET_COMPLETE_TIME 1000
#define PLL_RESET_COMPLETE_TIME 100
enum meson_soc_id {
MESON_SOC_A1,
MESON_SOC_G12A,
};
struct phy_meson_g12a_usb2_priv {
struct regmap *regmap;
#if CONFIG_IS_ENABLED(CLK)
struct clk clk;
#endif
struct reset_ctl reset;
#if CONFIG_IS_ENABLED(POWER_DOMAIN)
struct power_domain pwrdm;
#endif
int soc_id;
};
static int phy_meson_g12a_usb2_init(struct phy *phy)
{
struct udevice *dev = phy->dev;
struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
u32 value;
int ret;
#if CONFIG_IS_ENABLED(CLK)
ret = clk_enable(&priv->clk);
if (ret && ret != -ENOSYS && ret != -ENOTSUPP) {
pr_err("failed to enable PHY clock\n");
return ret;
}
#endif
ret = reset_assert(&priv->reset);
udelay(1);
ret |= reset_deassert(&priv->reset);
if (ret)
return ret;
udelay(RESET_COMPLETE_TIME);
/* usb2_otg_aca_en == 0 */
regmap_update_bits(priv->regmap, PHY_CTRL_R21, BIT(2), 0);
/* PLL Setup : 24MHz * 20 / 1 = 480MHz */
regmap_write(priv->regmap, PHY_CTRL_R16,
FIELD_PREP(PHY_CTRL_R16_MPLL_M, 20) |
FIELD_PREP(PHY_CTRL_R16_MPLL_N, 1) |
PHY_CTRL_R16_MPLL_LOAD |
FIELD_PREP(PHY_CTRL_R16_MPLL_LOCK_LONG, 1) |
PHY_CTRL_R16_MPLL_FAST_LOCK |
PHY_CTRL_R16_MPLL_EN |
PHY_CTRL_R16_MPLL_RESET);
regmap_write(priv->regmap, PHY_CTRL_R17,
FIELD_PREP(PHY_CTRL_R17_MPLL_FRAC_IN, 0) |
FIELD_PREP(PHY_CTRL_R17_MPLL_LAMBDA1, 7) |
FIELD_PREP(PHY_CTRL_R17_MPLL_LAMBDA0, 7) |
FIELD_PREP(PHY_CTRL_R17_MPLL_FILTER_PVT2, 2) |
FIELD_PREP(PHY_CTRL_R17_MPLL_FILTER_PVT1, 9));
value = FIELD_PREP(PHY_CTRL_R18_MPLL_LKW_SEL, 1) |
FIELD_PREP(PHY_CTRL_R18_MPLL_LK_W, 9) |
FIELD_PREP(PHY_CTRL_R18_MPLL_LK_S, 0x27) |
FIELD_PREP(PHY_CTRL_R18_MPLL_PFD_GAIN, 1) |
FIELD_PREP(PHY_CTRL_R18_MPLL_ROU, 7) |
FIELD_PREP(PHY_CTRL_R18_MPLL_DATA_SEL, 3) |
FIELD_PREP(PHY_CTRL_R18_MPLL_BIAS_ADJ, 1) |
FIELD_PREP(PHY_CTRL_R18_MPLL_BB_MODE, 0) |
FIELD_PREP(PHY_CTRL_R18_MPLL_ALPHA, 3) |
FIELD_PREP(PHY_CTRL_R18_MPLL_ADJ_LDO, 1) |
PHY_CTRL_R18_MPLL_ACG_RANGE;
if (priv->soc_id == MESON_SOC_A1)
value |= PHY_CTRL_R18_MPLL_DCO_CLK_SEL;
regmap_write(priv->regmap, PHY_CTRL_R18, value);
udelay(PLL_RESET_COMPLETE_TIME);
/* UnReset PLL */
regmap_write(priv->regmap, PHY_CTRL_R16,
FIELD_PREP(PHY_CTRL_R16_MPLL_M, 20) |
FIELD_PREP(PHY_CTRL_R16_MPLL_N, 1) |
PHY_CTRL_R16_MPLL_LOAD |
FIELD_PREP(PHY_CTRL_R16_MPLL_LOCK_LONG, 1) |
PHY_CTRL_R16_MPLL_FAST_LOCK |
PHY_CTRL_R16_MPLL_EN);
/* PHY Tuning */
regmap_write(priv->regmap, PHY_CTRL_R20,
FIELD_PREP(PHY_CTRL_R20_USB2_OTG_VBUS_TRIM_2_0, 4) |
PHY_CTRL_R20_USB2_OTG_VBUSDET_EN |
FIELD_PREP(PHY_CTRL_R20_USB2_DMON_SEL_3_0, 15) |
PHY_CTRL_R20_USB2_EDGE_DRV_EN |
FIELD_PREP(PHY_CTRL_R20_USB2_EDGE_DRV_TRIM_1_0, 3) |
FIELD_PREP(PHY_CTRL_R20_USB2_BGR_ADJ_4_0, 0) |
FIELD_PREP(PHY_CTRL_R20_USB2_BGR_VREF_4_0, 0) |
FIELD_PREP(PHY_CTRL_R20_USB2_BGR_DBG_1_0, 0));
if (priv->soc_id == MESON_SOC_G12A)
regmap_write(priv->regmap, PHY_CTRL_R4,
FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_7_0, 0xf) |
FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_15_8, 0xf) |
FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_23_16, 0xf) |
PHY_CTRL_R4_TEST_BYPASS_MODE_EN |
FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_1_0, 0) |
FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_3_2, 0));
else if (priv->soc_id == MESON_SOC_A1)
regmap_write(priv->regmap, PHY_CTRL_R21,
PHY_CTRL_R21_USB2_CAL_ACK_EN |
PHY_CTRL_R21_USB2_TX_STRG_PD |
FIELD_PREP(PHY_CTRL_R21_USB2_OTG_ACA_TRIM_1_0, 2));
/* Tuning Disconnect Threshold */
regmap_write(priv->regmap, PHY_CTRL_R3,
FIELD_PREP(PHY_CTRL_R3_SQUELCH_REF, 0) |
FIELD_PREP(PHY_CTRL_R3_HSDIC_REF, 1) |
FIELD_PREP(PHY_CTRL_R3_DISC_THRESH, 3));
/* Analog Settings */
if (priv->soc_id == MESON_SOC_G12A) {
regmap_write(priv->regmap, PHY_CTRL_R14, 0);
regmap_write(priv->regmap, PHY_CTRL_R13,
PHY_CTRL_R13_UPDATE_PMA_SIGNALS |
FIELD_PREP(PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET, 7));
} else if (priv->soc_id == MESON_SOC_A1) {
regmap_write(priv->regmap, PHY_CTRL_R13,
FIELD_PREP(PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET, 7));
}
return 0;
}
static int phy_meson_g12a_usb2_exit(struct phy *phy)
{
struct udevice *dev = phy->dev;
struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
int ret;
#if CONFIG_IS_ENABLED(CLK)
clk_disable(&priv->clk);
#endif
ret = reset_assert(&priv->reset);
if (ret)
return ret;
return 0;
}
struct phy_ops meson_g12a_usb2_phy_ops = {
.init = phy_meson_g12a_usb2_init,
.exit = phy_meson_g12a_usb2_exit,
};
int meson_g12a_usb2_phy_probe(struct udevice *dev)
{
struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
int ret;
priv->soc_id = (enum meson_soc_id)dev_get_driver_data(dev);
ret = regmap_init_mem(dev_ofnode(dev), &priv->regmap);
if (ret)
return ret;
ret = reset_get_by_index(dev, 0, &priv->reset);
if (ret == -ENOTSUPP)
return 0;
else if (ret)
return ret;
ret = reset_deassert(&priv->reset);
if (ret) {
reset_release_all(&priv->reset, 1);
return ret;
}
#if CONFIG_IS_ENABLED(POWER_DOMAIN)
ret = power_domain_get(dev, &priv->pwrdm);
if (ret < 0 && ret != -ENODEV && ret != -ENOENT) {
pr_err("failed to get power domain : %d\n", ret);
return ret;
}
if (ret != -ENODEV && ret != -ENOENT) {
ret = power_domain_on(&priv->pwrdm);
if (ret < 0) {
pr_err("failed to enable power domain\n");
return ret;
}
}
#endif
#if CONFIG_IS_ENABLED(CLK)
ret = clk_get_by_index(dev, 0, &priv->clk);
if (ret < 0)
return ret;
#endif
return 0;
}
static const struct udevice_id meson_g12a_usb2_phy_ids[] = {
{
.compatible = "amlogic,g12a-usb2-phy",
.data = (ulong)MESON_SOC_G12A,
},
{
.compatible = "amlogic,a1-usb2-phy",
.data = (ulong)MESON_SOC_A1,
},
{ }
};
U_BOOT_DRIVER(meson_g12a_usb2_phy) = {
.name = "meson_g12a_usb2_phy",
.id = UCLASS_PHY,
.of_match = meson_g12a_usb2_phy_ids,
.probe = meson_g12a_usb2_phy_probe,
.ops = &meson_g12a_usb2_phy_ops,
.priv_auto = sizeof(struct phy_meson_g12a_usb2_priv),
};