1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2018 MediaTek Inc. 4 * Author: Chunhui Dai <chunhui.dai@mediatek.com> 5 */ 6 7 #include "phy-mtk-hdmi.h" 8 9 #define HDMI_CON0 0x00 10 #define RG_HDMITX_DRV_IBIAS 0 11 #define RG_HDMITX_DRV_IBIAS_MASK GENMASK(5, 0) 12 #define RG_HDMITX_EN_SER 12 13 #define RG_HDMITX_EN_SER_MASK GENMASK(15, 12) 14 #define RG_HDMITX_EN_SLDO 16 15 #define RG_HDMITX_EN_SLDO_MASK GENMASK(19, 16) 16 #define RG_HDMITX_EN_PRED 20 17 #define RG_HDMITX_EN_PRED_MASK GENMASK(23, 20) 18 #define RG_HDMITX_EN_IMP 24 19 #define RG_HDMITX_EN_IMP_MASK GENMASK(27, 24) 20 #define RG_HDMITX_EN_DRV 28 21 #define RG_HDMITX_EN_DRV_MASK GENMASK(31, 28) 22 23 #define HDMI_CON1 0x04 24 #define RG_HDMITX_PRED_IBIAS 18 25 #define RG_HDMITX_PRED_IBIAS_MASK GENMASK(21, 18) 26 #define RG_HDMITX_PRED_IMP BIT(22) 27 #define RG_HDMITX_DRV_IMP 26 28 #define RG_HDMITX_DRV_IMP_MASK GENMASK(31, 26) 29 30 #define HDMI_CON2 0x08 31 #define RG_HDMITX_EN_TX_CKLDO BIT(0) 32 #define RG_HDMITX_EN_TX_POSDIV BIT(1) 33 #define RG_HDMITX_TX_POSDIV 3 34 #define RG_HDMITX_TX_POSDIV_MASK GENMASK(4, 3) 35 #define RG_HDMITX_EN_MBIAS BIT(6) 36 #define RG_HDMITX_MBIAS_LPF_EN BIT(7) 37 38 #define HDMI_CON4 0x10 39 #define RG_HDMITX_RESERVE_MASK GENMASK(31, 0) 40 41 #define HDMI_CON6 0x18 42 #define RG_HTPLL_BR 0 43 #define RG_HTPLL_BR_MASK GENMASK(1, 0) 44 #define RG_HTPLL_BC 2 45 #define RG_HTPLL_BC_MASK GENMASK(3, 2) 46 #define RG_HTPLL_BP 4 47 #define RG_HTPLL_BP_MASK GENMASK(7, 4) 48 #define RG_HTPLL_IR 8 49 #define RG_HTPLL_IR_MASK GENMASK(11, 8) 50 #define RG_HTPLL_IC 12 51 #define RG_HTPLL_IC_MASK GENMASK(15, 12) 52 #define RG_HTPLL_POSDIV 16 53 #define RG_HTPLL_POSDIV_MASK GENMASK(17, 16) 54 #define RG_HTPLL_PREDIV 18 55 #define RG_HTPLL_PREDIV_MASK GENMASK(19, 18) 56 #define RG_HTPLL_FBKSEL 20 57 #define RG_HTPLL_FBKSEL_MASK GENMASK(21, 20) 58 #define RG_HTPLL_RLH_EN BIT(22) 59 #define RG_HTPLL_FBKDIV 24 60 #define RG_HTPLL_FBKDIV_MASK GENMASK(30, 24) 61 #define RG_HTPLL_EN BIT(31) 62 63 #define HDMI_CON7 0x1c 64 #define RG_HTPLL_AUTOK_EN BIT(23) 65 #define RG_HTPLL_DIVEN 28 66 #define RG_HTPLL_DIVEN_MASK GENMASK(30, 28) 67 68 static int mtk_hdmi_pll_prepare(struct clk_hw *hw) 69 { 70 struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw); 71 72 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON7, RG_HTPLL_AUTOK_EN); 73 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_RLH_EN); 74 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_POSDIV_MASK); 75 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_MBIAS); 76 usleep_range(80, 100); 77 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_EN); 78 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_TX_CKLDO); 79 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_SLDO_MASK); 80 usleep_range(80, 100); 81 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_MBIAS_LPF_EN); 82 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_SER_MASK); 83 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_PRED_MASK); 84 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_DRV_MASK); 85 usleep_range(80, 100); 86 return 0; 87 } 88 89 static void mtk_hdmi_pll_unprepare(struct clk_hw *hw) 90 { 91 struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw); 92 93 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_DRV_MASK); 94 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_PRED_MASK); 95 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_SER_MASK); 96 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_MBIAS_LPF_EN); 97 usleep_range(80, 100); 98 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_SLDO_MASK); 99 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_TX_CKLDO); 100 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_EN); 101 usleep_range(80, 100); 102 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_MBIAS); 103 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_POSDIV_MASK); 104 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_RLH_EN); 105 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON7, RG_HTPLL_AUTOK_EN); 106 usleep_range(80, 100); 107 } 108 109 static long mtk_hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate, 110 unsigned long *parent_rate) 111 { 112 return rate; 113 } 114 115 static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate, 116 unsigned long parent_rate) 117 { 118 struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw); 119 u32 pos_div; 120 121 if (rate <= 64000000) 122 pos_div = 3; 123 else if (rate <= 128000000) 124 pos_div = 2; 125 else 126 pos_div = 1; 127 128 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_PREDIV_MASK); 129 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_POSDIV_MASK); 130 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_TX_POSDIV); 131 mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6, (0x1 << RG_HTPLL_IC), 132 RG_HTPLL_IC_MASK); 133 mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6, (0x1 << RG_HTPLL_IR), 134 RG_HTPLL_IR_MASK); 135 mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON2, (pos_div << RG_HDMITX_TX_POSDIV), 136 RG_HDMITX_TX_POSDIV_MASK); 137 mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6, (1 << RG_HTPLL_FBKSEL), 138 RG_HTPLL_FBKSEL_MASK); 139 mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6, (19 << RG_HTPLL_FBKDIV), 140 RG_HTPLL_FBKDIV_MASK); 141 mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON7, (0x2 << RG_HTPLL_DIVEN), 142 RG_HTPLL_DIVEN_MASK); 143 mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6, (0xc << RG_HTPLL_BP), 144 RG_HTPLL_BP_MASK); 145 mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6, (0x2 << RG_HTPLL_BC), 146 RG_HTPLL_BC_MASK); 147 mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6, (0x1 << RG_HTPLL_BR), 148 RG_HTPLL_BR_MASK); 149 150 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON1, RG_HDMITX_PRED_IMP); 151 mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON1, (0x3 << RG_HDMITX_PRED_IBIAS), 152 RG_HDMITX_PRED_IBIAS_MASK); 153 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_IMP_MASK); 154 mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON1, (0x28 << RG_HDMITX_DRV_IMP), 155 RG_HDMITX_DRV_IMP_MASK); 156 mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON4, 0x28, RG_HDMITX_RESERVE_MASK); 157 mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON0, (0xa << RG_HDMITX_DRV_IBIAS), 158 RG_HDMITX_DRV_IBIAS_MASK); 159 return 0; 160 } 161 162 static unsigned long mtk_hdmi_pll_recalc_rate(struct clk_hw *hw, 163 unsigned long parent_rate) 164 { 165 struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw); 166 unsigned long out_rate, val; 167 168 val = (readl(hdmi_phy->regs + HDMI_CON6) 169 & RG_HTPLL_PREDIV_MASK) >> RG_HTPLL_PREDIV; 170 switch (val) { 171 case 0x00: 172 out_rate = parent_rate; 173 break; 174 case 0x01: 175 out_rate = parent_rate / 2; 176 break; 177 default: 178 out_rate = parent_rate / 4; 179 break; 180 } 181 182 val = (readl(hdmi_phy->regs + HDMI_CON6) 183 & RG_HTPLL_FBKDIV_MASK) >> RG_HTPLL_FBKDIV; 184 out_rate *= (val + 1) * 2; 185 val = (readl(hdmi_phy->regs + HDMI_CON2) 186 & RG_HDMITX_TX_POSDIV_MASK); 187 out_rate >>= (val >> RG_HDMITX_TX_POSDIV); 188 189 if (readl(hdmi_phy->regs + HDMI_CON2) & RG_HDMITX_EN_TX_POSDIV) 190 out_rate /= 5; 191 192 return out_rate; 193 } 194 195 static const struct clk_ops mtk_hdmi_phy_pll_ops = { 196 .prepare = mtk_hdmi_pll_prepare, 197 .unprepare = mtk_hdmi_pll_unprepare, 198 .set_rate = mtk_hdmi_pll_set_rate, 199 .round_rate = mtk_hdmi_pll_round_rate, 200 .recalc_rate = mtk_hdmi_pll_recalc_rate, 201 }; 202 203 static void mtk_hdmi_phy_enable_tmds(struct mtk_hdmi_phy *hdmi_phy) 204 { 205 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON7, RG_HTPLL_AUTOK_EN); 206 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_RLH_EN); 207 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_POSDIV_MASK); 208 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_MBIAS); 209 usleep_range(80, 100); 210 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_EN); 211 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_TX_CKLDO); 212 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_SLDO_MASK); 213 usleep_range(80, 100); 214 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_MBIAS_LPF_EN); 215 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_SER_MASK); 216 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_PRED_MASK); 217 mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_DRV_MASK); 218 usleep_range(80, 100); 219 } 220 221 static void mtk_hdmi_phy_disable_tmds(struct mtk_hdmi_phy *hdmi_phy) 222 { 223 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_DRV_MASK); 224 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_PRED_MASK); 225 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_SER_MASK); 226 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_MBIAS_LPF_EN); 227 usleep_range(80, 100); 228 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_SLDO_MASK); 229 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_TX_CKLDO); 230 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_EN); 231 usleep_range(80, 100); 232 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_MBIAS); 233 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_POSDIV_MASK); 234 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_RLH_EN); 235 mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON7, RG_HTPLL_AUTOK_EN); 236 usleep_range(80, 100); 237 } 238 239 struct mtk_hdmi_phy_conf mtk_hdmi_phy_2701_conf = { 240 .flags = CLK_SET_RATE_GATE, 241 .pll_default_off = true, 242 .hdmi_phy_clk_ops = &mtk_hdmi_phy_pll_ops, 243 .hdmi_phy_enable_tmds = mtk_hdmi_phy_enable_tmds, 244 .hdmi_phy_disable_tmds = mtk_hdmi_phy_disable_tmds, 245 }; 246 247 MODULE_AUTHOR("Chunhui Dai <chunhui.dai@mediatek.com>"); 248 MODULE_DESCRIPTION("MediaTek HDMI PHY Driver"); 249 MODULE_LICENSE("GPL v2"); 250