diff options
Diffstat (limited to 'drivers/phy/socionext/phy-uniphier-ahci.c')
| -rw-r--r-- | drivers/phy/socionext/phy-uniphier-ahci.c | 201 |
1 files changed, 197 insertions, 4 deletions
diff --git a/drivers/phy/socionext/phy-uniphier-ahci.c b/drivers/phy/socionext/phy-uniphier-ahci.c index 7427c40bf4ae..28cf3efe0695 100644 --- a/drivers/phy/socionext/phy-uniphier-ahci.c +++ b/drivers/phy/socionext/phy-uniphier-ahci.c @@ -19,8 +19,9 @@ struct uniphier_ahciphy_priv { struct device *dev; void __iomem *base; - struct clk *clk, *clk_parent; - struct reset_control *rst, *rst_parent; + struct clk *clk, *clk_parent, *clk_parent_gio; + struct reset_control *rst, *rst_parent, *rst_parent_gio; + struct reset_control *rst_pm, *rst_tx, *rst_rx; const struct uniphier_ahciphy_soc_data *data; }; @@ -28,10 +29,30 @@ struct uniphier_ahciphy_soc_data { int (*init)(struct uniphier_ahciphy_priv *priv); int (*power_on)(struct uniphier_ahciphy_priv *priv); int (*power_off)(struct uniphier_ahciphy_priv *priv); + bool is_legacy; bool is_ready_high; bool is_phy_clk; }; +/* for Pro4 */ +#define CKCTRL0 0x0 +#define CKCTRL0_CK_OFF BIT(9) +#define CKCTRL0_NCY_MASK GENMASK(8, 4) +#define CKCTRL0_NCY5_MASK GENMASK(3, 2) +#define CKCTRL0_PRESCALE_MASK GENMASK(1, 0) +#define CKCTRL1 0x4 +#define CKCTRL1_LOS_LVL_MASK GENMASK(20, 16) +#define CKCTRL1_TX_LVL_MASK GENMASK(12, 8) +#define RXTXCTRL 0x8 +#define RXTXCTRL_RX_EQ_VALL_MASK GENMASK(31, 29) +#define RXTXCTRL_RX_DPLL_MODE_MASK GENMASK(28, 26) +#define RXTXCTRL_TX_ATTEN_MASK GENMASK(14, 12) +#define RXTXCTRL_TX_BOOST_MASK GENMASK(11, 8) +#define RXTXCTRL_TX_EDGERATE_MASK GENMASK(3, 2) +#define RXTXCTRL_TX_CKO_EN BIT(0) +#define RSTPWR 0x30 +#define RSTPWR_RX_EN_VAL BIT(18) + /* for PXs2/PXs3 */ #define CKCTRL 0x0 #define CKCTRL_P0_READY BIT(15) @@ -50,6 +71,128 @@ struct uniphier_ahciphy_soc_data { #define RXCTRL_LOS_BIAS_MASK GENMASK(10, 8) #define RXCTRL_RX_EQ_MASK GENMASK(2, 0) +static int uniphier_ahciphy_pro4_init(struct uniphier_ahciphy_priv *priv) +{ + u32 val; + + /* set phy MPLL parameters */ + val = readl(priv->base + CKCTRL0); + val &= ~CKCTRL0_NCY_MASK; + val |= FIELD_PREP(CKCTRL0_NCY_MASK, 0x6); + val &= ~CKCTRL0_NCY5_MASK; + val |= FIELD_PREP(CKCTRL0_NCY5_MASK, 0x2); + val &= ~CKCTRL0_PRESCALE_MASK; + val |= FIELD_PREP(CKCTRL0_PRESCALE_MASK, 0x1); + writel(val, priv->base + CKCTRL0); + + /* setup phy control parameters */ + val = readl(priv->base + CKCTRL1); + val &= ~CKCTRL1_LOS_LVL_MASK; + val |= FIELD_PREP(CKCTRL1_LOS_LVL_MASK, 0x10); + val &= ~CKCTRL1_TX_LVL_MASK; + val |= FIELD_PREP(CKCTRL1_TX_LVL_MASK, 0x06); + writel(val, priv->base + CKCTRL1); + + val = readl(priv->base + RXTXCTRL); + val &= ~RXTXCTRL_RX_EQ_VALL_MASK; + val |= FIELD_PREP(RXTXCTRL_RX_EQ_VALL_MASK, 0x6); + val &= ~RXTXCTRL_RX_DPLL_MODE_MASK; + val |= FIELD_PREP(RXTXCTRL_RX_DPLL_MODE_MASK, 0x3); + val &= ~RXTXCTRL_TX_ATTEN_MASK; + val |= FIELD_PREP(RXTXCTRL_TX_ATTEN_MASK, 0x3); + val &= ~RXTXCTRL_TX_BOOST_MASK; + val |= FIELD_PREP(RXTXCTRL_TX_BOOST_MASK, 0x5); + val &= ~RXTXCTRL_TX_EDGERATE_MASK; + val |= FIELD_PREP(RXTXCTRL_TX_EDGERATE_MASK, 0x0); + writel(val, priv->base + RXTXCTRL); + + return 0; +} + +static int uniphier_ahciphy_pro4_power_on(struct uniphier_ahciphy_priv *priv) +{ + u32 val; + int ret; + + /* enable reference clock for phy */ + val = readl(priv->base + CKCTRL0); + val &= ~CKCTRL0_CK_OFF; + writel(val, priv->base + CKCTRL0); + + /* enable TX clock */ + val = readl(priv->base + RXTXCTRL); + val |= RXTXCTRL_TX_CKO_EN; + writel(val, priv->base + RXTXCTRL); + + /* wait until RX is ready */ + ret = readl_poll_timeout(priv->base + RSTPWR, val, + !(val & RSTPWR_RX_EN_VAL), 200, 2000); + if (ret) { + dev_err(priv->dev, "Failed to check whether Rx is ready\n"); + goto out_disable_clock; + } + + /* release all reset */ + ret = reset_control_deassert(priv->rst_pm); + if (ret) { + dev_err(priv->dev, "Failed to release PM reset\n"); + goto out_disable_clock; + } + + ret = reset_control_deassert(priv->rst_tx); + if (ret) { + dev_err(priv->dev, "Failed to release Tx reset\n"); + goto out_reset_pm_assert; + } + + ret = reset_control_deassert(priv->rst_rx); + if (ret) { + dev_err(priv->dev, "Failed to release Rx reset\n"); + goto out_reset_tx_assert; + } + + return 0; + +out_reset_tx_assert: + reset_control_assert(priv->rst_tx); +out_reset_pm_assert: + reset_control_assert(priv->rst_pm); + +out_disable_clock: + /* disable TX clock */ + val = readl(priv->base + RXTXCTRL); + val &= ~RXTXCTRL_TX_CKO_EN; + writel(val, priv->base + RXTXCTRL); + + /* disable reference clock for phy */ + val = readl(priv->base + CKCTRL0); + val |= CKCTRL0_CK_OFF; + writel(val, priv->base + CKCTRL0); + + return ret; +} + +static int uniphier_ahciphy_pro4_power_off(struct uniphier_ahciphy_priv *priv) +{ + u32 val; + + reset_control_assert(priv->rst_rx); + reset_control_assert(priv->rst_tx); + reset_control_assert(priv->rst_pm); + + /* disable TX clock */ + val = readl(priv->base + RXTXCTRL); + val &= ~RXTXCTRL_TX_CKO_EN; + writel(val, priv->base + RXTXCTRL); + + /* disable reference clock for phy */ + val = readl(priv->base + CKCTRL0); + val |= CKCTRL0_CK_OFF; + writel(val, priv->base + CKCTRL0); + + return 0; +} + static void uniphier_ahciphy_pxs2_enable(struct uniphier_ahciphy_priv *priv, bool enable) { @@ -142,14 +285,22 @@ static int uniphier_ahciphy_init(struct phy *phy) struct uniphier_ahciphy_priv *priv = phy_get_drvdata(phy); int ret; - ret = clk_prepare_enable(priv->clk_parent); + ret = clk_prepare_enable(priv->clk_parent_gio); if (ret) return ret; - ret = reset_control_deassert(priv->rst_parent); + ret = clk_prepare_enable(priv->clk_parent); + if (ret) + goto out_clk_gio_disable; + + ret = reset_control_deassert(priv->rst_parent_gio); if (ret) goto out_clk_disable; + ret = reset_control_deassert(priv->rst_parent); + if (ret) + goto out_rst_gio_assert; + if (priv->data->init) { ret = priv->data->init(priv); if (ret) @@ -160,8 +311,12 @@ static int uniphier_ahciphy_init(struct phy *phy) out_rst_assert: reset_control_assert(priv->rst_parent); +out_rst_gio_assert: + reset_control_assert(priv->rst_parent_gio); out_clk_disable: clk_disable_unprepare(priv->clk_parent); +out_clk_gio_disable: + clk_disable_unprepare(priv->clk_parent_gio); return ret; } @@ -171,7 +326,9 @@ static int uniphier_ahciphy_exit(struct phy *phy) struct uniphier_ahciphy_priv *priv = phy_get_drvdata(phy); reset_control_assert(priv->rst_parent); + reset_control_assert(priv->rst_parent_gio); clk_disable_unprepare(priv->clk_parent); + clk_disable_unprepare(priv->clk_parent_gio); return 0; } @@ -265,6 +422,28 @@ static int uniphier_ahciphy_probe(struct platform_device *pdev) if (IS_ERR(priv->rst)) return PTR_ERR(priv->rst); + if (priv->data->is_legacy) { + priv->clk_parent_gio = devm_clk_get(dev, "gio"); + if (IS_ERR(priv->clk_parent_gio)) + return PTR_ERR(priv->clk_parent_gio); + priv->rst_parent_gio = + devm_reset_control_get_shared(dev, "gio"); + if (IS_ERR(priv->rst_parent_gio)) + return PTR_ERR(priv->rst_parent_gio); + + priv->rst_pm = devm_reset_control_get_shared(dev, "pm"); + if (IS_ERR(priv->rst_pm)) + return PTR_ERR(priv->rst_pm); + + priv->rst_tx = devm_reset_control_get_shared(dev, "tx"); + if (IS_ERR(priv->rst_tx)) + return PTR_ERR(priv->rst_tx); + + priv->rst_rx = devm_reset_control_get_shared(dev, "rx"); + if (IS_ERR(priv->rst_rx)) + return PTR_ERR(priv->rst_rx); + } + phy = devm_phy_create(dev, dev->of_node, &uniphier_ahciphy_ops); if (IS_ERR(phy)) { dev_err(dev, "failed to create phy\n"); @@ -279,9 +458,18 @@ static int uniphier_ahciphy_probe(struct platform_device *pdev) return 0; } +static const struct uniphier_ahciphy_soc_data uniphier_pro4_data = { + .init = uniphier_ahciphy_pro4_init, + .power_on = uniphier_ahciphy_pro4_power_on, + .power_off = uniphier_ahciphy_pro4_power_off, + .is_legacy = true, + .is_phy_clk = false, +}; + static const struct uniphier_ahciphy_soc_data uniphier_pxs2_data = { .power_on = uniphier_ahciphy_pxs2_power_on, .power_off = uniphier_ahciphy_pxs2_power_off, + .is_legacy = false, .is_ready_high = false, .is_phy_clk = false, }; @@ -290,12 +478,17 @@ static const struct uniphier_ahciphy_soc_data uniphier_pxs3_data = { .init = uniphier_ahciphy_pxs3_init, .power_on = uniphier_ahciphy_pxs2_power_on, .power_off = uniphier_ahciphy_pxs2_power_off, + .is_legacy = false, .is_ready_high = true, .is_phy_clk = true, }; static const struct of_device_id uniphier_ahciphy_match[] = { { + .compatible = "socionext,uniphier-pro4-ahci-phy", + .data = &uniphier_pro4_data, + }, + { .compatible = "socionext,uniphier-pxs2-ahci-phy", .data = &uniphier_pxs2_data, }, |