1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2014 MediaTek Inc. 4 * Author: Jie Qiu <jie.qiu@mediatek.com> 5 */ 6 7 #include "phy-mtk-hdmi.h" 8 #include "phy-mtk-io.h" 9 10 #define HDMI_CON0 0x00 11 #define RG_HDMITX_PLL_EN BIT(31) 12 #define RG_HDMITX_PLL_FBKDIV GENMASK(30, 24) 13 #define RG_HDMITX_PLL_FBKSEL GENMASK(23, 22) 14 #define RG_HDMITX_PLL_PREDIV GENMASK(21, 20) 15 #define RG_HDMITX_PLL_POSDIV GENMASK(19, 18) 16 #define RG_HDMITX_PLL_RST_DLY GENMASK(17, 16) 17 #define RG_HDMITX_PLL_IR GENMASK(15, 12) 18 #define RG_HDMITX_PLL_IC GENMASK(11, 8) 19 #define RG_HDMITX_PLL_BP GENMASK(7, 4) 20 #define RG_HDMITX_PLL_BR GENMASK(3, 2) 21 #define RG_HDMITX_PLL_BC GENMASK(1, 0) 22 #define HDMI_CON1 0x04 23 #define RG_HDMITX_PLL_DIVEN GENMASK(31, 29) 24 #define RG_HDMITX_PLL_AUTOK_EN BIT(28) 25 #define RG_HDMITX_PLL_AUTOK_KF GENMASK(27, 26) 26 #define RG_HDMITX_PLL_AUTOK_KS GENMASK(25, 24) 27 #define RG_HDMITX_PLL_AUTOK_LOAD BIT(23) 28 #define RG_HDMITX_PLL_BAND GENMASK(21, 16) 29 #define RG_HDMITX_PLL_REF_SEL BIT(15) 30 #define RG_HDMITX_PLL_BIAS_EN BIT(14) 31 #define RG_HDMITX_PLL_BIAS_LPF_EN BIT(13) 32 #define RG_HDMITX_PLL_TXDIV_EN BIT(12) 33 #define RG_HDMITX_PLL_TXDIV GENMASK(11, 10) 34 #define RG_HDMITX_PLL_LVROD_EN BIT(9) 35 #define RG_HDMITX_PLL_MONVC_EN BIT(8) 36 #define RG_HDMITX_PLL_MONCK_EN BIT(7) 37 #define RG_HDMITX_PLL_MONREF_EN BIT(6) 38 #define RG_HDMITX_PLL_TST_EN BIT(5) 39 #define RG_HDMITX_PLL_TST_CK_EN BIT(4) 40 #define RG_HDMITX_PLL_TST_SEL GENMASK(3, 0) 41 #define HDMI_CON2 0x08 42 #define RGS_HDMITX_PLL_AUTOK_BAND GENMASK(14, 8) 43 #define RGS_HDMITX_PLL_AUTOK_FAIL BIT(1) 44 #define RG_HDMITX_EN_TX_CKLDO BIT(0) 45 #define HDMI_CON3 0x0c 46 #define RG_HDMITX_SER_EN GENMASK(31, 28) 47 #define RG_HDMITX_PRD_EN GENMASK(27, 24) 48 #define RG_HDMITX_PRD_IMP_EN GENMASK(23, 20) 49 #define RG_HDMITX_DRV_EN GENMASK(19, 16) 50 #define RG_HDMITX_DRV_IMP_EN GENMASK(15, 12) 51 #define RG_HDMITX_MHLCK_FORCE BIT(10) 52 #define RG_HDMITX_MHLCK_PPIX_EN BIT(9) 53 #define RG_HDMITX_MHLCK_EN BIT(8) 54 #define RG_HDMITX_SER_DIN_SEL GENMASK(7, 4) 55 #define RG_HDMITX_SER_5T1_BIST_EN BIT(3) 56 #define RG_HDMITX_SER_BIST_TOG BIT(2) 57 #define RG_HDMITX_SER_DIN_TOG BIT(1) 58 #define RG_HDMITX_SER_CLKDIG_INV BIT(0) 59 #define HDMI_CON4 0x10 60 #define RG_HDMITX_PRD_IBIAS_CLK GENMASK(27, 24) 61 #define RG_HDMITX_PRD_IBIAS_D2 GENMASK(19, 16) 62 #define RG_HDMITX_PRD_IBIAS_D1 GENMASK(11, 8) 63 #define RG_HDMITX_PRD_IBIAS_D0 GENMASK(3, 0) 64 #define HDMI_CON5 0x14 65 #define RG_HDMITX_DRV_IBIAS_CLK GENMASK(29, 24) 66 #define RG_HDMITX_DRV_IBIAS_D2 GENMASK(21, 16) 67 #define RG_HDMITX_DRV_IBIAS_D1 GENMASK(13, 8) 68 #define RG_HDMITX_DRV_IBIAS_D0 GENMASK(5, 0) 69 #define HDMI_CON6 0x18 70 #define RG_HDMITX_DRV_IMP_CLK GENMASK(29, 24) 71 #define RG_HDMITX_DRV_IMP_D2 GENMASK(21, 16) 72 #define RG_HDMITX_DRV_IMP_D1 GENMASK(13, 8) 73 #define RG_HDMITX_DRV_IMP_D0 GENMASK(5, 0) 74 #define HDMI_CON7 0x1c 75 #define RG_HDMITX_MHLCK_DRV_IBIAS GENMASK(31, 27) 76 #define RG_HDMITX_SER_DIN GENMASK(25, 16) 77 #define RG_HDMITX_CHLDC_TST GENMASK(15, 12) 78 #define RG_HDMITX_CHLCK_TST GENMASK(11, 8) 79 #define RG_HDMITX_RESERVE GENMASK(7, 0) 80 #define HDMI_CON8 0x20 81 #define RGS_HDMITX_2T1_LEV GENMASK(19, 16) 82 #define RGS_HDMITX_2T1_EDG GENMASK(15, 12) 83 #define RGS_HDMITX_5T1_LEV GENMASK(11, 8) 84 #define RGS_HDMITX_5T1_EDG GENMASK(7, 4) 85 #define RGS_HDMITX_PLUG_TST BIT(0) 86 87 static int mtk_hdmi_pll_prepare(struct clk_hw *hw) 88 { 89 struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw); 90 void __iomem *base = hdmi_phy->regs; 91 92 mtk_phy_set_bits(base + HDMI_CON1, RG_HDMITX_PLL_AUTOK_EN); 93 mtk_phy_set_bits(base + HDMI_CON0, RG_HDMITX_PLL_POSDIV); 94 mtk_phy_clear_bits(base + HDMI_CON3, RG_HDMITX_MHLCK_EN); 95 mtk_phy_set_bits(base + HDMI_CON1, RG_HDMITX_PLL_BIAS_EN); 96 usleep_range(100, 150); 97 mtk_phy_set_bits(base + HDMI_CON0, RG_HDMITX_PLL_EN); 98 usleep_range(100, 150); 99 mtk_phy_set_bits(base + HDMI_CON1, RG_HDMITX_PLL_BIAS_LPF_EN); 100 mtk_phy_set_bits(base + HDMI_CON1, RG_HDMITX_PLL_TXDIV_EN); 101 102 return 0; 103 } 104 105 static void mtk_hdmi_pll_unprepare(struct clk_hw *hw) 106 { 107 struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw); 108 void __iomem *base = hdmi_phy->regs; 109 110 mtk_phy_clear_bits(base + HDMI_CON1, RG_HDMITX_PLL_TXDIV_EN); 111 mtk_phy_clear_bits(base + HDMI_CON1, RG_HDMITX_PLL_BIAS_LPF_EN); 112 usleep_range(100, 150); 113 mtk_phy_clear_bits(base + HDMI_CON0, RG_HDMITX_PLL_EN); 114 usleep_range(100, 150); 115 mtk_phy_clear_bits(base + HDMI_CON1, RG_HDMITX_PLL_BIAS_EN); 116 mtk_phy_clear_bits(base + HDMI_CON0, RG_HDMITX_PLL_POSDIV); 117 mtk_phy_clear_bits(base + HDMI_CON1, RG_HDMITX_PLL_AUTOK_EN); 118 usleep_range(100, 150); 119 } 120 121 static long mtk_hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate, 122 unsigned long *parent_rate) 123 { 124 struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw); 125 126 hdmi_phy->pll_rate = rate; 127 if (rate <= 74250000) 128 *parent_rate = rate; 129 else 130 *parent_rate = rate / 2; 131 132 return rate; 133 } 134 135 static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate, 136 unsigned long parent_rate) 137 { 138 struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw); 139 void __iomem *base = hdmi_phy->regs; 140 unsigned int pre_div; 141 unsigned int div; 142 unsigned int pre_ibias; 143 unsigned int hdmi_ibias; 144 unsigned int imp_en; 145 146 dev_dbg(hdmi_phy->dev, "%s: %lu Hz, parent: %lu Hz\n", __func__, 147 rate, parent_rate); 148 149 if (rate <= 27000000) { 150 pre_div = 0; 151 div = 3; 152 } else if (rate <= 74250000) { 153 pre_div = 1; 154 div = 2; 155 } else { 156 pre_div = 1; 157 div = 1; 158 } 159 160 mtk_phy_update_field(base + HDMI_CON0, RG_HDMITX_PLL_PREDIV, pre_div); 161 mtk_phy_set_bits(base + HDMI_CON0, RG_HDMITX_PLL_POSDIV); 162 mtk_phy_update_bits(base + HDMI_CON0, 163 RG_HDMITX_PLL_IC | RG_HDMITX_PLL_IR, 164 FIELD_PREP(RG_HDMITX_PLL_IC, 0x1) | 165 FIELD_PREP(RG_HDMITX_PLL_IR, 0x1)); 166 mtk_phy_update_field(base + HDMI_CON1, RG_HDMITX_PLL_TXDIV, div); 167 mtk_phy_update_bits(base + HDMI_CON0, 168 RG_HDMITX_PLL_FBKSEL | RG_HDMITX_PLL_FBKDIV, 169 FIELD_PREP(RG_HDMITX_PLL_FBKSEL, 0x1) | 170 FIELD_PREP(RG_HDMITX_PLL_FBKDIV, 19)); 171 mtk_phy_update_field(base + HDMI_CON1, RG_HDMITX_PLL_DIVEN, 0x2); 172 mtk_phy_update_bits(base + HDMI_CON0, 173 RG_HDMITX_PLL_BP | RG_HDMITX_PLL_BC | 174 RG_HDMITX_PLL_BR, 175 FIELD_PREP(RG_HDMITX_PLL_BP, 0xc) | 176 FIELD_PREP(RG_HDMITX_PLL_BC, 0x2) | 177 FIELD_PREP(RG_HDMITX_PLL_BR, 0x1)); 178 if (rate < 165000000) { 179 mtk_phy_clear_bits(base + HDMI_CON3, RG_HDMITX_PRD_IMP_EN); 180 pre_ibias = 0x3; 181 imp_en = 0x0; 182 hdmi_ibias = hdmi_phy->ibias; 183 } else { 184 mtk_phy_set_bits(base + HDMI_CON3, RG_HDMITX_PRD_IMP_EN); 185 pre_ibias = 0x6; 186 imp_en = 0xf; 187 hdmi_ibias = hdmi_phy->ibias_up; 188 } 189 mtk_phy_update_bits(base + HDMI_CON4, 190 RG_HDMITX_PRD_IBIAS_CLK | RG_HDMITX_PRD_IBIAS_D2 | 191 RG_HDMITX_PRD_IBIAS_D1 | RG_HDMITX_PRD_IBIAS_D0, 192 FIELD_PREP(RG_HDMITX_PRD_IBIAS_CLK, pre_ibias) | 193 FIELD_PREP(RG_HDMITX_PRD_IBIAS_D2, pre_ibias) | 194 FIELD_PREP(RG_HDMITX_PRD_IBIAS_D1, pre_ibias) | 195 FIELD_PREP(RG_HDMITX_PRD_IBIAS_D0, pre_ibias)); 196 mtk_phy_update_field(base + HDMI_CON3, RG_HDMITX_DRV_IMP_EN, imp_en); 197 mtk_phy_update_bits(base + HDMI_CON6, 198 RG_HDMITX_DRV_IMP_CLK | RG_HDMITX_DRV_IMP_D2 | 199 RG_HDMITX_DRV_IMP_D1 | RG_HDMITX_DRV_IMP_D0, 200 FIELD_PREP(RG_HDMITX_DRV_IMP_CLK, hdmi_phy->drv_imp_clk) | 201 FIELD_PREP(RG_HDMITX_DRV_IMP_D2, hdmi_phy->drv_imp_d2) | 202 FIELD_PREP(RG_HDMITX_DRV_IMP_D1, hdmi_phy->drv_imp_d1) | 203 FIELD_PREP(RG_HDMITX_DRV_IMP_D0, hdmi_phy->drv_imp_d0)); 204 mtk_phy_update_bits(base + HDMI_CON5, 205 RG_HDMITX_DRV_IBIAS_CLK | RG_HDMITX_DRV_IBIAS_D2 | 206 RG_HDMITX_DRV_IBIAS_D1 | RG_HDMITX_DRV_IBIAS_D0, 207 FIELD_PREP(RG_HDMITX_DRV_IBIAS_CLK, hdmi_ibias) | 208 FIELD_PREP(RG_HDMITX_DRV_IBIAS_D2, hdmi_ibias) | 209 FIELD_PREP(RG_HDMITX_DRV_IBIAS_D1, hdmi_ibias) | 210 FIELD_PREP(RG_HDMITX_DRV_IBIAS_D0, hdmi_ibias)); 211 return 0; 212 } 213 214 static unsigned long mtk_hdmi_pll_recalc_rate(struct clk_hw *hw, 215 unsigned long parent_rate) 216 { 217 struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw); 218 219 return hdmi_phy->pll_rate; 220 } 221 222 static const struct clk_ops mtk_hdmi_phy_pll_ops = { 223 .prepare = mtk_hdmi_pll_prepare, 224 .unprepare = mtk_hdmi_pll_unprepare, 225 .set_rate = mtk_hdmi_pll_set_rate, 226 .round_rate = mtk_hdmi_pll_round_rate, 227 .recalc_rate = mtk_hdmi_pll_recalc_rate, 228 }; 229 230 static void mtk_hdmi_phy_enable_tmds(struct mtk_hdmi_phy *hdmi_phy) 231 { 232 mtk_phy_set_bits(hdmi_phy->regs + HDMI_CON3, 233 RG_HDMITX_SER_EN | RG_HDMITX_PRD_EN | 234 RG_HDMITX_DRV_EN); 235 usleep_range(100, 150); 236 } 237 238 static void mtk_hdmi_phy_disable_tmds(struct mtk_hdmi_phy *hdmi_phy) 239 { 240 mtk_phy_clear_bits(hdmi_phy->regs + HDMI_CON3, 241 RG_HDMITX_DRV_EN | RG_HDMITX_PRD_EN | 242 RG_HDMITX_SER_EN); 243 } 244 245 struct mtk_hdmi_phy_conf mtk_hdmi_phy_8173_conf = { 246 .flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_GATE, 247 .hdmi_phy_clk_ops = &mtk_hdmi_phy_pll_ops, 248 .hdmi_phy_enable_tmds = mtk_hdmi_phy_enable_tmds, 249 .hdmi_phy_disable_tmds = mtk_hdmi_phy_disable_tmds, 250 }; 251 252 MODULE_AUTHOR("Jie Qiu <jie.qiu@mediatek.com>"); 253 MODULE_DESCRIPTION("MediaTek MT8173 HDMI PHY Driver"); 254 MODULE_LICENSE("GPL v2"); 255