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path: root/drivers/phy/amlogic/phy-meson8b-usb2.c
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Diffstat (limited to 'drivers/phy/amlogic/phy-meson8b-usb2.c')
-rw-r--r--drivers/phy/amlogic/phy-meson8b-usb2.c149
1 files changed, 98 insertions, 51 deletions
diff --git a/drivers/phy/amlogic/phy-meson8b-usb2.c b/drivers/phy/amlogic/phy-meson8b-usb2.c
index bd66bd723e4a..03c061dd5f0d 100644
--- a/drivers/phy/amlogic/phy-meson8b-usb2.c
+++ b/drivers/phy/amlogic/phy-meson8b-usb2.c
@@ -10,6 +10,8 @@
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_device.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
@@ -76,6 +78,17 @@
#define REG_ADP_BC_ACA_PIN_FLOAT BIT(26)
#define REG_DBG_UART 0x10
+ #define REG_DBG_UART_BYPASS_SEL BIT(0)
+ #define REG_DBG_UART_BYPASS_DM_EN BIT(1)
+ #define REG_DBG_UART_BYPASS_DP_EN BIT(2)
+ #define REG_DBG_UART_BYPASS_DM_DATA BIT(3)
+ #define REG_DBG_UART_BYPASS_DP_DATA BIT(4)
+ #define REG_DBG_UART_FSV_MINUS BIT(5)
+ #define REG_DBG_UART_FSV_PLUS BIT(6)
+ #define REG_DBG_UART_FSV_BURN_IN_TEST BIT(7)
+ #define REG_DBG_UART_LOOPBACK_EN_B BIT(8)
+ #define REG_DBG_UART_SET_IDDQ BIT(9)
+ #define REG_DBG_UART_ATE_RESET BIT(10)
#define REG_TEST 0x14
#define REG_TEST_DATA_IN_MASK GENMASK(3, 0)
@@ -104,35 +117,30 @@
#define RESET_COMPLETE_TIME 500
#define ACA_ENABLE_COMPLETE_TIME 50
-struct phy_meson8b_usb2_priv {
- void __iomem *regs;
- enum usb_dr_mode dr_mode;
- struct clk *clk_usb_general;
- struct clk *clk_usb;
- struct reset_control *reset;
+struct phy_meson8b_usb2_match_data {
+ bool host_enable_aca;
};
-static u32 phy_meson8b_usb2_read(struct phy_meson8b_usb2_priv *phy_priv,
- u32 reg)
-{
- return readl(phy_priv->regs + reg);
-}
-
-static void phy_meson8b_usb2_mask_bits(struct phy_meson8b_usb2_priv *phy_priv,
- u32 reg, u32 mask, u32 value)
-{
- u32 data;
-
- data = phy_meson8b_usb2_read(phy_priv, reg);
- data &= ~mask;
- data |= (value & mask);
+struct phy_meson8b_usb2_priv {
+ struct regmap *regmap;
+ enum usb_dr_mode dr_mode;
+ struct clk *clk_usb_general;
+ struct clk *clk_usb;
+ struct reset_control *reset;
+ const struct phy_meson8b_usb2_match_data *match;
+};
- writel(data, phy_priv->regs + reg);
-}
+static const struct regmap_config phy_meson8b_usb2_regmap_conf = {
+ .reg_bits = 8,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .max_register = REG_TUNE,
+};
static int phy_meson8b_usb2_power_on(struct phy *phy)
{
struct phy_meson8b_usb2_priv *priv = phy_get_drvdata(phy);
+ u32 reg;
int ret;
if (!IS_ERR_OR_NULL(priv->reset)) {
@@ -156,38 +164,43 @@ static int phy_meson8b_usb2_power_on(struct phy *phy)
return ret;
}
- phy_meson8b_usb2_mask_bits(priv, REG_CONFIG, REG_CONFIG_CLK_32k_ALTSEL,
- REG_CONFIG_CLK_32k_ALTSEL);
+ regmap_update_bits(priv->regmap, REG_CONFIG, REG_CONFIG_CLK_32k_ALTSEL,
+ REG_CONFIG_CLK_32k_ALTSEL);
- phy_meson8b_usb2_mask_bits(priv, REG_CTRL, REG_CTRL_REF_CLK_SEL_MASK,
- 0x2 << REG_CTRL_REF_CLK_SEL_SHIFT);
+ regmap_update_bits(priv->regmap, REG_CTRL, REG_CTRL_REF_CLK_SEL_MASK,
+ 0x2 << REG_CTRL_REF_CLK_SEL_SHIFT);
- phy_meson8b_usb2_mask_bits(priv, REG_CTRL, REG_CTRL_FSEL_MASK,
- 0x5 << REG_CTRL_FSEL_SHIFT);
+ regmap_update_bits(priv->regmap, REG_CTRL, REG_CTRL_FSEL_MASK,
+ 0x5 << REG_CTRL_FSEL_SHIFT);
/* reset the PHY */
- phy_meson8b_usb2_mask_bits(priv, REG_CTRL, REG_CTRL_POWER_ON_RESET,
- REG_CTRL_POWER_ON_RESET);
+ regmap_update_bits(priv->regmap, REG_CTRL, REG_CTRL_POWER_ON_RESET,
+ REG_CTRL_POWER_ON_RESET);
udelay(RESET_COMPLETE_TIME);
- phy_meson8b_usb2_mask_bits(priv, REG_CTRL, REG_CTRL_POWER_ON_RESET, 0);
+ regmap_update_bits(priv->regmap, REG_CTRL, REG_CTRL_POWER_ON_RESET, 0);
udelay(RESET_COMPLETE_TIME);
- phy_meson8b_usb2_mask_bits(priv, REG_CTRL, REG_CTRL_SOF_TOGGLE_OUT,
- REG_CTRL_SOF_TOGGLE_OUT);
+ regmap_update_bits(priv->regmap, REG_CTRL, REG_CTRL_SOF_TOGGLE_OUT,
+ REG_CTRL_SOF_TOGGLE_OUT);
if (priv->dr_mode == USB_DR_MODE_HOST) {
- phy_meson8b_usb2_mask_bits(priv, REG_ADP_BC,
+ regmap_update_bits(priv->regmap, REG_DBG_UART,
+ REG_DBG_UART_SET_IDDQ, 0);
+
+ if (priv->match->host_enable_aca) {
+ regmap_update_bits(priv->regmap, REG_ADP_BC,
REG_ADP_BC_ACA_ENABLE,
REG_ADP_BC_ACA_ENABLE);
- udelay(ACA_ENABLE_COMPLETE_TIME);
+ udelay(ACA_ENABLE_COMPLETE_TIME);
- if (phy_meson8b_usb2_read(priv, REG_ADP_BC) &
- REG_ADP_BC_ACA_PIN_FLOAT) {
- dev_warn(&phy->dev, "USB ID detect failed!\n");
- clk_disable_unprepare(priv->clk_usb);
- clk_disable_unprepare(priv->clk_usb_general);
- return -EINVAL;
+ regmap_read(priv->regmap, REG_ADP_BC, &reg);
+ if (reg & REG_ADP_BC_ACA_PIN_FLOAT) {
+ dev_warn(&phy->dev, "USB ID detect failed!\n");
+ clk_disable_unprepare(priv->clk_usb);
+ clk_disable_unprepare(priv->clk_usb_general);
+ return -EINVAL;
+ }
}
}
@@ -198,6 +211,11 @@ static int phy_meson8b_usb2_power_off(struct phy *phy)
{
struct phy_meson8b_usb2_priv *priv = phy_get_drvdata(phy);
+ if (priv->dr_mode == USB_DR_MODE_HOST)
+ regmap_update_bits(priv->regmap, REG_DBG_UART,
+ REG_DBG_UART_SET_IDDQ,
+ REG_DBG_UART_SET_IDDQ);
+
clk_disable_unprepare(priv->clk_usb);
clk_disable_unprepare(priv->clk_usb_general);
@@ -213,18 +231,26 @@ static const struct phy_ops phy_meson8b_usb2_ops = {
static int phy_meson8b_usb2_probe(struct platform_device *pdev)
{
struct phy_meson8b_usb2_priv *priv;
- struct resource *res;
struct phy *phy;
struct phy_provider *phy_provider;
+ void __iomem *base;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- priv->regs = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(priv->regs))
- return PTR_ERR(priv->regs);
+ base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ priv->match = device_get_match_data(&pdev->dev);
+ if (!priv->match)
+ return -ENODEV;
+
+ priv->regmap = devm_regmap_init_mmio(&pdev->dev, base,
+ &phy_meson8b_usb2_regmap_conf);
+ if (IS_ERR(priv->regmap))
+ return PTR_ERR(priv->regmap);
priv->clk_usb_general = devm_clk_get(&pdev->dev, "usb_general");
if (IS_ERR(priv->clk_usb_general))
@@ -259,11 +285,32 @@ static int phy_meson8b_usb2_probe(struct platform_device *pdev)
return PTR_ERR_OR_ZERO(phy_provider);
}
+static const struct phy_meson8b_usb2_match_data phy_meson8_usb2_match_data = {
+ .host_enable_aca = false,
+};
+
+static const struct phy_meson8b_usb2_match_data phy_meson8b_usb2_match_data = {
+ .host_enable_aca = true,
+};
+
static const struct of_device_id phy_meson8b_usb2_of_match[] = {
- { .compatible = "amlogic,meson8-usb2-phy", },
- { .compatible = "amlogic,meson8b-usb2-phy", },
- { .compatible = "amlogic,meson-gxbb-usb2-phy", },
- { },
+ {
+ .compatible = "amlogic,meson8-usb2-phy",
+ .data = &phy_meson8_usb2_match_data
+ },
+ {
+ .compatible = "amlogic,meson8b-usb2-phy",
+ .data = &phy_meson8b_usb2_match_data
+ },
+ {
+ .compatible = "amlogic,meson8m2-usb2-phy",
+ .data = &phy_meson8b_usb2_match_data
+ },
+ {
+ .compatible = "amlogic,meson-gxbb-usb2-phy",
+ .data = &phy_meson8b_usb2_match_data
+ },
+ { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, phy_meson8b_usb2_of_match);
@@ -277,5 +324,5 @@ static struct platform_driver phy_meson8b_usb2_driver = {
module_platform_driver(phy_meson8b_usb2_driver);
MODULE_AUTHOR("Martin Blumenstingl <martin.blumenstingl@googlemail.com>");
-MODULE_DESCRIPTION("Meson8, Meson8b and GXBB USB2 PHY driver");
+MODULE_DESCRIPTION("Meson8, Meson8b, Meson8m2 and GXBB USB2 PHY driver");
MODULE_LICENSE("GPL");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.