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path: root/drivers/phy/mediatek/phy-mtk-hdmi-mt2701.c
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Diffstat (limited to 'drivers/phy/mediatek/phy-mtk-hdmi-mt2701.c')
-rw-r--r--drivers/phy/mediatek/phy-mtk-hdmi-mt2701.c227
1 files changed, 227 insertions, 0 deletions
diff --git a/drivers/phy/mediatek/phy-mtk-hdmi-mt2701.c b/drivers/phy/mediatek/phy-mtk-hdmi-mt2701.c
new file mode 100644
index 0000000000..e51b2d13ea
--- /dev/null
+++ b/drivers/phy/mediatek/phy-mtk-hdmi-mt2701.c
@@ -0,0 +1,227 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 MediaTek Inc.
+ * Author: Chunhui Dai <chunhui.dai@mediatek.com>
+ */
+
+#include "phy-mtk-hdmi.h"
+#include "phy-mtk-io.h"
+
+#define HDMI_CON0 0x00
+#define RG_HDMITX_DRV_IBIAS_MASK GENMASK(5, 0)
+#define RG_HDMITX_EN_SER_MASK GENMASK(15, 12)
+#define RG_HDMITX_EN_SLDO_MASK GENMASK(19, 16)
+#define RG_HDMITX_EN_PRED_MASK GENMASK(23, 20)
+#define RG_HDMITX_EN_IMP_MASK GENMASK(27, 24)
+#define RG_HDMITX_EN_DRV_MASK GENMASK(31, 28)
+
+#define HDMI_CON1 0x04
+#define RG_HDMITX_PRED_IBIAS_MASK GENMASK(21, 18)
+#define RG_HDMITX_PRED_IMP BIT(22)
+#define RG_HDMITX_DRV_IMP_MASK GENMASK(31, 26)
+
+#define HDMI_CON2 0x08
+#define RG_HDMITX_EN_TX_CKLDO BIT(0)
+#define RG_HDMITX_EN_TX_POSDIV BIT(1)
+#define RG_HDMITX_TX_POSDIV_MASK GENMASK(4, 3)
+#define RG_HDMITX_EN_MBIAS BIT(6)
+#define RG_HDMITX_MBIAS_LPF_EN BIT(7)
+
+#define HDMI_CON4 0x10
+#define RG_HDMITX_RESERVE_MASK GENMASK(31, 0)
+
+#define HDMI_CON6 0x18
+#define RG_HTPLL_BR_MASK GENMASK(1, 0)
+#define RG_HTPLL_BC_MASK GENMASK(3, 2)
+#define RG_HTPLL_BP_MASK GENMASK(7, 4)
+#define RG_HTPLL_IR_MASK GENMASK(11, 8)
+#define RG_HTPLL_IC_MASK GENMASK(15, 12)
+#define RG_HTPLL_POSDIV_MASK GENMASK(17, 16)
+#define RG_HTPLL_PREDIV_MASK GENMASK(19, 18)
+#define RG_HTPLL_FBKSEL_MASK GENMASK(21, 20)
+#define RG_HTPLL_RLH_EN BIT(22)
+#define RG_HTPLL_FBKDIV_MASK GENMASK(30, 24)
+#define RG_HTPLL_EN BIT(31)
+
+#define HDMI_CON7 0x1c
+#define RG_HTPLL_AUTOK_EN BIT(23)
+#define RG_HTPLL_DIVEN_MASK GENMASK(30, 28)
+
+static int mtk_hdmi_pll_prepare(struct clk_hw *hw)
+{
+ struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
+ void __iomem *base = hdmi_phy->regs;
+
+ mtk_phy_set_bits(base + HDMI_CON7, RG_HTPLL_AUTOK_EN);
+ mtk_phy_clear_bits(base + HDMI_CON6, RG_HTPLL_RLH_EN);
+ mtk_phy_set_bits(base + HDMI_CON6, RG_HTPLL_POSDIV_MASK);
+ mtk_phy_set_bits(base + HDMI_CON2, RG_HDMITX_EN_MBIAS);
+ usleep_range(80, 100);
+ mtk_phy_set_bits(base + HDMI_CON6, RG_HTPLL_EN);
+ mtk_phy_set_bits(base + HDMI_CON2, RG_HDMITX_EN_TX_CKLDO);
+ mtk_phy_set_bits(base + HDMI_CON0, RG_HDMITX_EN_SLDO_MASK);
+ usleep_range(80, 100);
+ mtk_phy_set_bits(base + HDMI_CON2, RG_HDMITX_MBIAS_LPF_EN);
+ mtk_phy_set_bits(base + HDMI_CON0, RG_HDMITX_EN_SER_MASK);
+ mtk_phy_set_bits(base + HDMI_CON0, RG_HDMITX_EN_PRED_MASK);
+ mtk_phy_set_bits(base + HDMI_CON0, RG_HDMITX_EN_DRV_MASK);
+ usleep_range(80, 100);
+ return 0;
+}
+
+static void mtk_hdmi_pll_unprepare(struct clk_hw *hw)
+{
+ struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
+ void __iomem *base = hdmi_phy->regs;
+
+ mtk_phy_clear_bits(base + HDMI_CON0, RG_HDMITX_EN_DRV_MASK);
+ mtk_phy_clear_bits(base + HDMI_CON0, RG_HDMITX_EN_PRED_MASK);
+ mtk_phy_clear_bits(base + HDMI_CON0, RG_HDMITX_EN_SER_MASK);
+ mtk_phy_clear_bits(base + HDMI_CON2, RG_HDMITX_MBIAS_LPF_EN);
+ usleep_range(80, 100);
+ mtk_phy_clear_bits(base + HDMI_CON0, RG_HDMITX_EN_SLDO_MASK);
+ mtk_phy_clear_bits(base + HDMI_CON2, RG_HDMITX_EN_TX_CKLDO);
+ mtk_phy_clear_bits(base + HDMI_CON6, RG_HTPLL_EN);
+ usleep_range(80, 100);
+ mtk_phy_clear_bits(base + HDMI_CON2, RG_HDMITX_EN_MBIAS);
+ mtk_phy_clear_bits(base + HDMI_CON6, RG_HTPLL_POSDIV_MASK);
+ mtk_phy_clear_bits(base + HDMI_CON6, RG_HTPLL_RLH_EN);
+ mtk_phy_clear_bits(base + HDMI_CON7, RG_HTPLL_AUTOK_EN);
+ usleep_range(80, 100);
+}
+
+static long mtk_hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ return rate;
+}
+
+static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
+ void __iomem *base = hdmi_phy->regs;
+ u32 pos_div;
+
+ if (rate <= 64000000)
+ pos_div = 3;
+ else if (rate <= 128000000)
+ pos_div = 2;
+ else
+ pos_div = 1;
+
+ mtk_phy_set_bits(base + HDMI_CON6, RG_HTPLL_PREDIV_MASK);
+ mtk_phy_set_bits(base + HDMI_CON6, RG_HTPLL_POSDIV_MASK);
+ mtk_phy_set_bits(base + HDMI_CON2, RG_HDMITX_EN_TX_POSDIV);
+ mtk_phy_update_field(base + HDMI_CON6, RG_HTPLL_IC_MASK, 0x1);
+ mtk_phy_update_field(base + HDMI_CON6, RG_HTPLL_IR_MASK, 0x1);
+ mtk_phy_update_field(base + HDMI_CON2, RG_HDMITX_TX_POSDIV_MASK, pos_div);
+ mtk_phy_update_field(base + HDMI_CON6, RG_HTPLL_FBKSEL_MASK, 1);
+ mtk_phy_update_field(base + HDMI_CON6, RG_HTPLL_FBKDIV_MASK, 19);
+ mtk_phy_update_field(base + HDMI_CON7, RG_HTPLL_DIVEN_MASK, 0x2);
+ mtk_phy_update_field(base + HDMI_CON6, RG_HTPLL_BP_MASK, 0xc);
+ mtk_phy_update_field(base + HDMI_CON6, RG_HTPLL_BC_MASK, 0x2);
+ mtk_phy_update_field(base + HDMI_CON6, RG_HTPLL_BR_MASK, 0x1);
+
+ mtk_phy_clear_bits(base + HDMI_CON1, RG_HDMITX_PRED_IMP);
+ mtk_phy_update_field(base + HDMI_CON1, RG_HDMITX_PRED_IBIAS_MASK, 0x3);
+ mtk_phy_clear_bits(base + HDMI_CON0, RG_HDMITX_EN_IMP_MASK);
+ mtk_phy_update_field(base + HDMI_CON1, RG_HDMITX_DRV_IMP_MASK, 0x28);
+ mtk_phy_update_field(base + HDMI_CON4, RG_HDMITX_RESERVE_MASK, 0x28);
+ mtk_phy_update_field(base + HDMI_CON0, RG_HDMITX_DRV_IBIAS_MASK, 0xa);
+ return 0;
+}
+
+static unsigned long mtk_hdmi_pll_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
+ unsigned long out_rate, val;
+ u32 tmp;
+
+ tmp = readl(hdmi_phy->regs + HDMI_CON6);
+ val = FIELD_GET(RG_HTPLL_PREDIV_MASK, tmp);
+ switch (val) {
+ case 0x00:
+ out_rate = parent_rate;
+ break;
+ case 0x01:
+ out_rate = parent_rate / 2;
+ break;
+ default:
+ out_rate = parent_rate / 4;
+ break;
+ }
+
+ val = FIELD_GET(RG_HTPLL_FBKDIV_MASK, tmp);
+ out_rate *= (val + 1) * 2;
+
+ tmp = readl(hdmi_phy->regs + HDMI_CON2);
+ val = FIELD_GET(RG_HDMITX_TX_POSDIV_MASK, tmp);
+ out_rate >>= val;
+
+ if (tmp & RG_HDMITX_EN_TX_POSDIV)
+ out_rate /= 5;
+
+ return out_rate;
+}
+
+static const struct clk_ops mtk_hdmi_phy_pll_ops = {
+ .prepare = mtk_hdmi_pll_prepare,
+ .unprepare = mtk_hdmi_pll_unprepare,
+ .set_rate = mtk_hdmi_pll_set_rate,
+ .round_rate = mtk_hdmi_pll_round_rate,
+ .recalc_rate = mtk_hdmi_pll_recalc_rate,
+};
+
+static void mtk_hdmi_phy_enable_tmds(struct mtk_hdmi_phy *hdmi_phy)
+{
+ void __iomem *base = hdmi_phy->regs;
+
+ mtk_phy_set_bits(base + HDMI_CON7, RG_HTPLL_AUTOK_EN);
+ mtk_phy_clear_bits(base + HDMI_CON6, RG_HTPLL_RLH_EN);
+ mtk_phy_set_bits(base + HDMI_CON6, RG_HTPLL_POSDIV_MASK);
+ mtk_phy_set_bits(base + HDMI_CON2, RG_HDMITX_EN_MBIAS);
+ usleep_range(80, 100);
+ mtk_phy_set_bits(base + HDMI_CON6, RG_HTPLL_EN);
+ mtk_phy_set_bits(base + HDMI_CON2, RG_HDMITX_EN_TX_CKLDO);
+ mtk_phy_set_bits(base + HDMI_CON0, RG_HDMITX_EN_SLDO_MASK);
+ usleep_range(80, 100);
+ mtk_phy_set_bits(base + HDMI_CON2, RG_HDMITX_MBIAS_LPF_EN);
+ mtk_phy_set_bits(base + HDMI_CON0, RG_HDMITX_EN_SER_MASK);
+ mtk_phy_set_bits(base + HDMI_CON0, RG_HDMITX_EN_PRED_MASK);
+ mtk_phy_set_bits(base + HDMI_CON0, RG_HDMITX_EN_DRV_MASK);
+ usleep_range(80, 100);
+}
+
+static void mtk_hdmi_phy_disable_tmds(struct mtk_hdmi_phy *hdmi_phy)
+{
+ void __iomem *base = hdmi_phy->regs;
+
+ mtk_phy_clear_bits(base + HDMI_CON0, RG_HDMITX_EN_DRV_MASK);
+ mtk_phy_clear_bits(base + HDMI_CON0, RG_HDMITX_EN_PRED_MASK);
+ mtk_phy_clear_bits(base + HDMI_CON0, RG_HDMITX_EN_SER_MASK);
+ mtk_phy_clear_bits(base + HDMI_CON2, RG_HDMITX_MBIAS_LPF_EN);
+ usleep_range(80, 100);
+ mtk_phy_clear_bits(base + HDMI_CON0, RG_HDMITX_EN_SLDO_MASK);
+ mtk_phy_clear_bits(base + HDMI_CON2, RG_HDMITX_EN_TX_CKLDO);
+ mtk_phy_clear_bits(base + HDMI_CON6, RG_HTPLL_EN);
+ usleep_range(80, 100);
+ mtk_phy_clear_bits(base + HDMI_CON2, RG_HDMITX_EN_MBIAS);
+ mtk_phy_clear_bits(base + HDMI_CON6, RG_HTPLL_POSDIV_MASK);
+ mtk_phy_clear_bits(base + HDMI_CON6, RG_HTPLL_RLH_EN);
+ mtk_phy_clear_bits(base + HDMI_CON7, RG_HTPLL_AUTOK_EN);
+ usleep_range(80, 100);
+}
+
+struct mtk_hdmi_phy_conf mtk_hdmi_phy_2701_conf = {
+ .flags = CLK_SET_RATE_GATE,
+ .pll_default_off = true,
+ .hdmi_phy_clk_ops = &mtk_hdmi_phy_pll_ops,
+ .hdmi_phy_enable_tmds = mtk_hdmi_phy_enable_tmds,
+ .hdmi_phy_disable_tmds = mtk_hdmi_phy_disable_tmds,
+};
+
+MODULE_AUTHOR("Chunhui Dai <chunhui.dai@mediatek.com>");
+MODULE_DESCRIPTION("MediaTek HDMI PHY Driver");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 07:14:35 +0000