diff options
Diffstat (limited to 'drivers/phy/phy-exynos4x12-usb2.c')
| -rw-r--r-- | drivers/phy/phy-exynos4x12-usb2.c | 125 |
1 files changed, 88 insertions, 37 deletions
diff --git a/drivers/phy/phy-exynos4x12-usb2.c b/drivers/phy/phy-exynos4x12-usb2.c index d92a7cc5698..0b9de88579b 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, |