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path: root/drivers/phy/phy-exynos4x12-usb2.c
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Diffstat (limited to 'drivers/phy/phy-exynos4x12-usb2.c')
-rw-r--r--drivers/phy/phy-exynos4x12-usb2.c125
1 files changed, 88 insertions, 37 deletions
diff --git a/drivers/phy/phy-exynos4x12-usb2.c b/drivers/phy/phy-exynos4x12-usb2.c
index d92a7cc5698a..0b9de88579b1 100644
--- a/drivers/phy/phy-exynos4x12-usb2.c
+++ b/drivers/phy/phy-exynos4x12-usb2.c
@@ -67,6 +67,8 @@
#define EXYNOS_4x12_UPHYCLK_PHYFSEL_24MHZ (0x5 << 0)
#define EXYNOS_4x12_UPHYCLK_PHYFSEL_50MHZ (0x7 << 0)
+#define EXYNOS_3250_UPHYCLK_REFCLKSEL (0x2 << 8)
+
#define EXYNOS_4x12_UPHYCLK_PHY0_ID_PULLUP BIT(3)
#define EXYNOS_4x12_UPHYCLK_PHY0_COMMON_ON BIT(4)
#define EXYNOS_4x12_UPHYCLK_PHY1_COMMON_ON BIT(7)
@@ -86,13 +88,23 @@
#define EXYNOS_4x12_URSTCON_OTG_HLINK BIT(1)
#define EXYNOS_4x12_URSTCON_OTG_PHYLINK BIT(2)
#define EXYNOS_4x12_URSTCON_HOST_PHY BIT(3)
+/* The following bit defines are presented in the
+ * order taken from the Exynos4412 reference manual.
+ *
+ * During experiments with the hardware and debugging
+ * it was determined that the hardware behaves contrary
+ * to the manual.
+ *
+ * The following bit values were chaned accordingly to the
+ * results of real hardware experiments.
+ */
#define EXYNOS_4x12_URSTCON_PHY1 BIT(4)
-#define EXYNOS_4x12_URSTCON_HSIC0 BIT(5)
-#define EXYNOS_4x12_URSTCON_HSIC1 BIT(6)
+#define EXYNOS_4x12_URSTCON_HSIC0 BIT(6)
+#define EXYNOS_4x12_URSTCON_HSIC1 BIT(5)
#define EXYNOS_4x12_URSTCON_HOST_LINK_ALL BIT(7)
-#define EXYNOS_4x12_URSTCON_HOST_LINK_P0 BIT(8)
+#define EXYNOS_4x12_URSTCON_HOST_LINK_P0 BIT(10)
#define EXYNOS_4x12_URSTCON_HOST_LINK_P1 BIT(9)
-#define EXYNOS_4x12_URSTCON_HOST_LINK_P2 BIT(10)
+#define EXYNOS_4x12_URSTCON_HOST_LINK_P2 BIT(8)
/* Isolation, configured in the power management unit */
#define EXYNOS_4x12_USB_ISOL_OFFSET 0x704
@@ -187,7 +199,12 @@ static void exynos4x12_setup_clk(struct samsung_usb2_phy_instance *inst)
clk = readl(drv->reg_phy + EXYNOS_4x12_UPHYCLK);
clk &= ~EXYNOS_4x12_UPHYCLK_PHYFSEL_MASK;
+
+ if (drv->cfg->has_refclk_sel)
+ clk = EXYNOS_3250_UPHYCLK_REFCLKSEL;
+
clk |= drv->ref_reg_val << EXYNOS_4x12_UPHYCLK_PHYFSEL_OFFSET;
+ clk |= EXYNOS_4x12_UPHYCLK_PHY1_COMMON_ON;
writel(clk, drv->reg_phy + EXYNOS_4x12_UPHYCLK);
}
@@ -198,27 +215,22 @@ static void exynos4x12_phy_pwr(struct samsung_usb2_phy_instance *inst, bool on)
u32 phypwr = 0;
u32 rst;
u32 pwr;
- u32 mode = 0;
- u32 switch_mode = 0;
switch (inst->cfg->id) {
case EXYNOS4x12_DEVICE:
phypwr = EXYNOS_4x12_UPHYPWR_PHY0;
rstbits = EXYNOS_4x12_URSTCON_PHY0;
- mode = EXYNOS_4x12_MODE_SWITCH_DEVICE;
- switch_mode = 1;
break;
case EXYNOS4x12_HOST:
phypwr = EXYNOS_4x12_UPHYPWR_PHY1;
- rstbits = EXYNOS_4x12_URSTCON_HOST_PHY;
- mode = EXYNOS_4x12_MODE_SWITCH_HOST;
- switch_mode = 1;
+ rstbits = EXYNOS_4x12_URSTCON_HOST_PHY |
+ EXYNOS_4x12_URSTCON_PHY1 |
+ EXYNOS_4x12_URSTCON_HOST_LINK_P0;
break;
case EXYNOS4x12_HSIC0:
phypwr = EXYNOS_4x12_UPHYPWR_HSIC0;
- rstbits = EXYNOS_4x12_URSTCON_HSIC1 |
- EXYNOS_4x12_URSTCON_HOST_LINK_P0 |
- EXYNOS_4x12_URSTCON_HOST_PHY;
+ rstbits = EXYNOS_4x12_URSTCON_HSIC0 |
+ EXYNOS_4x12_URSTCON_HOST_LINK_P1;
break;
case EXYNOS4x12_HSIC1:
phypwr = EXYNOS_4x12_UPHYPWR_HSIC1;
@@ -228,11 +240,6 @@ static void exynos4x12_phy_pwr(struct samsung_usb2_phy_instance *inst, bool on)
};
if (on) {
- if (switch_mode)
- regmap_update_bits(drv->reg_sys,
- EXYNOS_4x12_MODE_SWITCH_OFFSET,
- EXYNOS_4x12_MODE_SWITCH_MASK, mode);
-
pwr = readl(drv->reg_phy + EXYNOS_4x12_UPHYPWR);
pwr &= ~phypwr;
writel(pwr, drv->reg_phy + EXYNOS_4x12_UPHYPWR);
@@ -253,41 +260,78 @@ static void exynos4x12_phy_pwr(struct samsung_usb2_phy_instance *inst, bool on)
}
}
-static int exynos4x12_power_on(struct samsung_usb2_phy_instance *inst)
+static void exynos4x12_power_on_int(struct samsung_usb2_phy_instance *inst)
{
- struct samsung_usb2_phy_driver *drv = inst->drv;
+ if (inst->int_cnt++ > 0)
+ return;
- inst->enabled = 1;
exynos4x12_setup_clk(inst);
- exynos4x12_phy_pwr(inst, 1);
exynos4x12_isol(inst, 0);
+ exynos4x12_phy_pwr(inst, 1);
+}
+
+static int exynos4x12_power_on(struct samsung_usb2_phy_instance *inst)
+{
+ struct samsung_usb2_phy_driver *drv = inst->drv;
+
+ if (inst->ext_cnt++ > 0)
+ return 0;
- /* Power on the device, as it is necessary for HSIC to work */
- if (inst->cfg->id == EXYNOS4x12_HSIC0) {
- struct samsung_usb2_phy_instance *device =
- &drv->instances[EXYNOS4x12_DEVICE];
- exynos4x12_phy_pwr(device, 1);
- exynos4x12_isol(device, 0);
+ if (inst->cfg->id == EXYNOS4x12_HOST) {
+ regmap_update_bits(drv->reg_sys, EXYNOS_4x12_MODE_SWITCH_OFFSET,
+ EXYNOS_4x12_MODE_SWITCH_MASK,
+ EXYNOS_4x12_MODE_SWITCH_HOST);
+ exynos4x12_power_on_int(&drv->instances[EXYNOS4x12_DEVICE]);
}
+ if (inst->cfg->id == EXYNOS4x12_DEVICE && drv->cfg->has_mode_switch)
+ regmap_update_bits(drv->reg_sys, EXYNOS_4x12_MODE_SWITCH_OFFSET,
+ EXYNOS_4x12_MODE_SWITCH_MASK,
+ EXYNOS_4x12_MODE_SWITCH_DEVICE);
+
+ if (inst->cfg->id == EXYNOS4x12_HSIC0 ||
+ inst->cfg->id == EXYNOS4x12_HSIC1) {
+ exynos4x12_power_on_int(&drv->instances[EXYNOS4x12_DEVICE]);
+ exynos4x12_power_on_int(&drv->instances[EXYNOS4x12_HOST]);
+ }
+
+ exynos4x12_power_on_int(inst);
+
return 0;
}
-static int exynos4x12_power_off(struct samsung_usb2_phy_instance *inst)
+static void exynos4x12_power_off_int(struct samsung_usb2_phy_instance *inst)
{
- struct samsung_usb2_phy_driver *drv = inst->drv;
- struct samsung_usb2_phy_instance *device =
- &drv->instances[EXYNOS4x12_DEVICE];
+ if (inst->int_cnt-- > 1)
+ return;
- inst->enabled = 0;
exynos4x12_isol(inst, 1);
exynos4x12_phy_pwr(inst, 0);
+}
+
+static int exynos4x12_power_off(struct samsung_usb2_phy_instance *inst)
+{
+ struct samsung_usb2_phy_driver *drv = inst->drv;
+
+ if (inst->ext_cnt-- > 1)
+ return 0;
+
+ if (inst->cfg->id == EXYNOS4x12_DEVICE && drv->cfg->has_mode_switch)
+ regmap_update_bits(drv->reg_sys, EXYNOS_4x12_MODE_SWITCH_OFFSET,
+ EXYNOS_4x12_MODE_SWITCH_MASK,
+ EXYNOS_4x12_MODE_SWITCH_HOST);
+
+ if (inst->cfg->id == EXYNOS4x12_HOST)
+ exynos4x12_power_off_int(&drv->instances[EXYNOS4x12_DEVICE]);
- if (inst->cfg->id == EXYNOS4x12_HSIC0 && !device->enabled) {
- exynos4x12_isol(device, 1);
- exynos4x12_phy_pwr(device, 0);
+ if (inst->cfg->id == EXYNOS4x12_HSIC0 ||
+ inst->cfg->id == EXYNOS4x12_HSIC1) {
+ exynos4x12_power_off_int(&drv->instances[EXYNOS4x12_DEVICE]);
+ exynos4x12_power_off_int(&drv->instances[EXYNOS4x12_HOST]);
}
+ exynos4x12_power_off_int(inst);
+
return 0;
}
@@ -320,6 +364,13 @@ static const struct samsung_usb2_common_phy exynos4x12_phys[] = {
{},
};
+const struct samsung_usb2_phy_config exynos3250_usb2_phy_config = {
+ .has_refclk_sel = 1,
+ .num_phys = 1,
+ .phys = exynos4x12_phys,
+ .rate_to_clk = exynos4x12_rate_to_clk,
+};
+
const struct samsung_usb2_phy_config exynos4x12_usb2_phy_config = {
.has_mode_switch = 1,
.num_phys = EXYNOS4x12_NUM_PHYS,