This SoC has a single USB 3.1 DRD combo phy and three USB2.0
DRD HS phy controllers those only support the UTMI+ interface.
Support only UTMI+ for this SoC which is very similar to what
the existing Exynos850 supports.
The combo phy supports both UTMI+ (HS) and PIPE3 (SS) and is
out of scope of this commit.
Add required change in phy driver to support HS phy for this SoC.
Signed-off-by: Pritam Manohar Sutar <pritam.sutar@xxxxxxxxxxx>
---
drivers/phy/samsung/phy-exynos5-usbdrd.c | 85 ++++++++++++++++++++++++
1 file changed, 85 insertions(+)
diff --git a/drivers/phy/samsung/phy-exynos5-usbdrd.c b/drivers/phy/samsung/phy-exynos5-usbdrd.c
index 634c4310c660..b440b56c6595 100644
--- a/drivers/phy/samsung/phy-exynos5-usbdrd.c
+++ b/drivers/phy/samsung/phy-exynos5-usbdrd.c
@@ -177,6 +177,9 @@
#define HSPHYPLLTUNE_PLL_P_TUNE GENMASK(3, 0)
/* Exynos850: USB DRD PHY registers */
+#define EXYNOSAUTOv920_DRD_CTRL_VER 0x00
+#define CTRL_VER_MAJOR_VERSION GENMASK(31, 24)
+
#define EXYNOS850_DRD_LINKCTRL 0x04
#define LINKCTRL_FORCE_RXELECIDLE BIT(18)
#define LINKCTRL_FORCE_PHYSTATUS BIT(17)
@@ -1772,6 +1775,10 @@ static const char * const exynos5_regulator_names[] = {
"vbus", "vbus-boost",
};
+static const char * const exynosautov920_clk_names[] = {
+ "ext_xtal",
+};
+
static const struct exynos5_usbdrd_phy_drvdata exynos5420_usbdrd_phy = {
.phy_cfg = phy_cfg_exynos5,
.phy_ops = &exynos5_usbdrd_phy_ops,
@@ -1847,6 +1854,81 @@ static const struct exynos5_usbdrd_phy_drvdata exynos850_usbdrd_phy = {
.n_regulators = ARRAY_SIZE(exynos5_regulator_names),
};
+static void exynosautov920_usbdrd_utmi_init(struct exynos5_usbdrd_phy *phy_drd)
+{
+ u32 version;
+
+ version = readl(phy_drd->reg_phy + EXYNOSAUTOv920_DRD_CTRL_VER);
+ dev_info(phy_drd->dev, "usbphy: version:0x%x\n", version);
+
+ if (FIELD_GET(CTRL_VER_MAJOR_VERSION, version) == 0x3)
+ /* utmi init for exynosautov920 HS phy */
+ exynos850_usbdrd_utmi_init(phy_drd);
+}
+
+static int exynosautov920_usbdrd_phy_init(struct phy *phy)
+{
+ struct phy_usb_instance *inst = phy_get_drvdata(phy);
+ struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
+ int ret = 0;
+
+ ret = clk_bulk_prepare_enable(phy_drd->drv_data->n_clks, phy_drd->clks);
+ if (ret)
+ return ret;
+
+ /* UTMI or PIPE3 specific init */
+ inst->phy_cfg->phy_init(phy_drd);
+
+ clk_bulk_disable_unprepare(phy_drd->drv_data->n_clks, phy_drd->clks);
+
+ return 0;
+}
+
+static void exynosautov920_v3p1_phy_dis(struct phy *phy)
+{
+ struct phy_usb_instance *inst = phy_get_drvdata(phy);
+ struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
+ void __iomem *reg_phy = phy_drd->reg_phy;
+ u32 version;
+
+ version = readl(reg_phy + EXYNOSAUTOv920_DRD_CTRL_VER);
+
+ if (FIELD_GET(CTRL_VER_MAJOR_VERSION, version) == 0x3)
+ exynos850_usbdrd_phy_exit(phy);
+}
+
+static int exynosautov920_usbdrd_phy_exit(struct phy *phy)
+{
+ struct phy_usb_instance *inst = phy_get_drvdata(phy);
+
+ if (inst->phy_cfg->id == EXYNOS5_DRDPHY_UTMI)
+ exynosautov920_v3p1_phy_dis(phy);
+
+ return 0;
+}
+
+static const struct phy_ops exynosautov920_usbdrd_phy_ops = {
+ .init = exynosautov920_usbdrd_phy_init,
+ .exit = exynosautov920_usbdrd_phy_exit,
+ .owner = THIS_MODULE,
+};
+
+static const struct exynos5_usbdrd_phy_config phy_cfg_exynosautov920[] = {
+ {
+ .id = EXYNOS5_DRDPHY_UTMI,
+ .phy_init = exynosautov920_usbdrd_utmi_init,
+ },
+};
+
+static const struct exynos5_usbdrd_phy_drvdata exynosautov920_usb31drd_phy = {
+ .phy_cfg = phy_cfg_exynosautov920,
+ .phy_ops = &exynosautov920_usbdrd_phy_ops,
+ .clk_names = exynosautov920_clk_names,
+ .n_clks = ARRAY_SIZE(exynosautov920_clk_names),
+ .core_clk_names = exynos5_core_clk_names,
+ .n_core_clks = ARRAY_SIZE(exynos5_core_clk_names),
+};
+
static const struct exynos5_usbdrd_phy_config phy_cfg_gs101[] = {
{
.id = EXYNOS5_DRDPHY_UTMI,
@@ -2047,6 +2129,9 @@ static const struct of_device_id exynos5_usbdrd_phy_of_match[] = {
}, {
.compatible = "samsung,exynos850-usbdrd-phy",
.data = &exynos850_usbdrd_phy
+ }, {
+ .compatible = "samsung,exynosautov920-usb31drd-phy",
+ .data = &exynosautov920_usb31drd_phy
},
{ },
};
--
2.34.1
