1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2019 MediaTek Inc. 4 * Author: jitao.shi <jitao.shi@mediatek.com> 5 */ 6 7 #include "phy-mtk-mipi-dsi.h" 8 9 #define MIPITX_DSI_CON 0x00 10 #define RG_DSI_LDOCORE_EN BIT(0) 11 #define RG_DSI_CKG_LDOOUT_EN BIT(1) 12 #define RG_DSI_BCLK_SEL (3 << 2) 13 #define RG_DSI_LD_IDX_SEL (7 << 4) 14 #define RG_DSI_PHYCLK_SEL (2 << 8) 15 #define RG_DSI_DSICLK_FREQ_SEL BIT(10) 16 #define RG_DSI_LPTX_CLMP_EN BIT(11) 17 18 #define MIPITX_DSI_CLOCK_LANE 0x04 19 #define MIPITX_DSI_DATA_LANE0 0x08 20 #define MIPITX_DSI_DATA_LANE1 0x0c 21 #define MIPITX_DSI_DATA_LANE2 0x10 22 #define MIPITX_DSI_DATA_LANE3 0x14 23 #define RG_DSI_LNTx_LDOOUT_EN BIT(0) 24 #define RG_DSI_LNTx_CKLANE_EN BIT(1) 25 #define RG_DSI_LNTx_LPTX_IPLUS1 BIT(2) 26 #define RG_DSI_LNTx_LPTX_IPLUS2 BIT(3) 27 #define RG_DSI_LNTx_LPTX_IMINUS BIT(4) 28 #define RG_DSI_LNTx_LPCD_IPLUS BIT(5) 29 #define RG_DSI_LNTx_LPCD_IMINUS BIT(6) 30 #define RG_DSI_LNTx_RT_CODE (0xf << 8) 31 32 #define MIPITX_DSI_TOP_CON 0x40 33 #define RG_DSI_LNT_INTR_EN BIT(0) 34 #define RG_DSI_LNT_HS_BIAS_EN BIT(1) 35 #define RG_DSI_LNT_IMP_CAL_EN BIT(2) 36 #define RG_DSI_LNT_TESTMODE_EN BIT(3) 37 #define RG_DSI_LNT_IMP_CAL_CODE (0xf << 4) 38 #define RG_DSI_LNT_AIO_SEL (7 << 8) 39 #define RG_DSI_PAD_TIE_LOW_EN BIT(11) 40 #define RG_DSI_DEBUG_INPUT_EN BIT(12) 41 #define RG_DSI_PRESERVE (7 << 13) 42 43 #define MIPITX_DSI_BG_CON 0x44 44 #define RG_DSI_BG_CORE_EN BIT(0) 45 #define RG_DSI_BG_CKEN BIT(1) 46 #define RG_DSI_BG_DIV (0x3 << 2) 47 #define RG_DSI_BG_FAST_CHARGE BIT(4) 48 #define RG_DSI_VOUT_MSK (0x3ffff << 5) 49 #define RG_DSI_V12_SEL (7 << 5) 50 #define RG_DSI_V10_SEL (7 << 8) 51 #define RG_DSI_V072_SEL (7 << 11) 52 #define RG_DSI_V04_SEL (7 << 14) 53 #define RG_DSI_V032_SEL (7 << 17) 54 #define RG_DSI_V02_SEL (7 << 20) 55 #define RG_DSI_BG_R1_TRIM (0xf << 24) 56 #define RG_DSI_BG_R2_TRIM (0xf << 28) 57 58 #define MIPITX_DSI_PLL_CON0 0x50 59 #define RG_DSI_MPPLL_PLL_EN BIT(0) 60 #define RG_DSI_MPPLL_DIV_MSK (0x1ff << 1) 61 #define RG_DSI_MPPLL_PREDIV (3 << 1) 62 #define RG_DSI_MPPLL_TXDIV0 (3 << 3) 63 #define RG_DSI_MPPLL_TXDIV1 (3 << 5) 64 #define RG_DSI_MPPLL_POSDIV (7 << 7) 65 #define RG_DSI_MPPLL_MONVC_EN BIT(10) 66 #define RG_DSI_MPPLL_MONREF_EN BIT(11) 67 #define RG_DSI_MPPLL_VOD_EN BIT(12) 68 69 #define MIPITX_DSI_PLL_CON1 0x54 70 #define RG_DSI_MPPLL_SDM_FRA_EN BIT(0) 71 #define RG_DSI_MPPLL_SDM_SSC_PH_INIT BIT(1) 72 #define RG_DSI_MPPLL_SDM_SSC_EN BIT(2) 73 #define RG_DSI_MPPLL_SDM_SSC_PRD (0xffff << 16) 74 75 #define MIPITX_DSI_PLL_CON2 0x58 76 77 #define MIPITX_DSI_PLL_TOP 0x64 78 #define RG_DSI_MPPLL_PRESERVE (0xff << 8) 79 80 #define MIPITX_DSI_PLL_PWR 0x68 81 #define RG_DSI_MPPLL_SDM_PWR_ON BIT(0) 82 #define RG_DSI_MPPLL_SDM_ISO_EN BIT(1) 83 #define RG_DSI_MPPLL_SDM_PWR_ACK BIT(8) 84 85 #define MIPITX_DSI_SW_CTRL 0x80 86 #define SW_CTRL_EN BIT(0) 87 88 #define MIPITX_DSI_SW_CTRL_CON0 0x84 89 #define SW_LNTC_LPTX_PRE_OE BIT(0) 90 #define SW_LNTC_LPTX_OE BIT(1) 91 #define SW_LNTC_LPTX_P BIT(2) 92 #define SW_LNTC_LPTX_N BIT(3) 93 #define SW_LNTC_HSTX_PRE_OE BIT(4) 94 #define SW_LNTC_HSTX_OE BIT(5) 95 #define SW_LNTC_HSTX_ZEROCLK BIT(6) 96 #define SW_LNT0_LPTX_PRE_OE BIT(7) 97 #define SW_LNT0_LPTX_OE BIT(8) 98 #define SW_LNT0_LPTX_P BIT(9) 99 #define SW_LNT0_LPTX_N BIT(10) 100 #define SW_LNT0_HSTX_PRE_OE BIT(11) 101 #define SW_LNT0_HSTX_OE BIT(12) 102 #define SW_LNT0_LPRX_EN BIT(13) 103 #define SW_LNT1_LPTX_PRE_OE BIT(14) 104 #define SW_LNT1_LPTX_OE BIT(15) 105 #define SW_LNT1_LPTX_P BIT(16) 106 #define SW_LNT1_LPTX_N BIT(17) 107 #define SW_LNT1_HSTX_PRE_OE BIT(18) 108 #define SW_LNT1_HSTX_OE BIT(19) 109 #define SW_LNT2_LPTX_PRE_OE BIT(20) 110 #define SW_LNT2_LPTX_OE BIT(21) 111 #define SW_LNT2_LPTX_P BIT(22) 112 #define SW_LNT2_LPTX_N BIT(23) 113 #define SW_LNT2_HSTX_PRE_OE BIT(24) 114 #define SW_LNT2_HSTX_OE BIT(25) 115 116 static int mtk_mipi_tx_pll_prepare(struct clk_hw *hw) 117 { 118 struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw); 119 u8 txdiv, txdiv0, txdiv1; 120 u64 pcw; 121 122 dev_dbg(mipi_tx->dev, "prepare: %u Hz\n", mipi_tx->data_rate); 123 124 if (mipi_tx->data_rate >= 500000000) { 125 txdiv = 1; 126 txdiv0 = 0; 127 txdiv1 = 0; 128 } else if (mipi_tx->data_rate >= 250000000) { 129 txdiv = 2; 130 txdiv0 = 1; 131 txdiv1 = 0; 132 } else if (mipi_tx->data_rate >= 125000000) { 133 txdiv = 4; 134 txdiv0 = 2; 135 txdiv1 = 0; 136 } else if (mipi_tx->data_rate > 62000000) { 137 txdiv = 8; 138 txdiv0 = 2; 139 txdiv1 = 1; 140 } else if (mipi_tx->data_rate >= 50000000) { 141 txdiv = 16; 142 txdiv0 = 2; 143 txdiv1 = 2; 144 } else { 145 return -EINVAL; 146 } 147 148 mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_BG_CON, 149 RG_DSI_VOUT_MSK | 150 RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN, 151 (4 << 20) | (4 << 17) | (4 << 14) | 152 (4 << 11) | (4 << 8) | (4 << 5) | 153 RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN); 154 155 usleep_range(30, 100); 156 157 mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_TOP_CON, 158 RG_DSI_LNT_IMP_CAL_CODE | RG_DSI_LNT_HS_BIAS_EN, 159 (8 << 4) | RG_DSI_LNT_HS_BIAS_EN); 160 161 mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_CON, 162 RG_DSI_CKG_LDOOUT_EN | RG_DSI_LDOCORE_EN); 163 164 mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR, 165 RG_DSI_MPPLL_SDM_PWR_ON | 166 RG_DSI_MPPLL_SDM_ISO_EN, 167 RG_DSI_MPPLL_SDM_PWR_ON); 168 169 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0, 170 RG_DSI_MPPLL_PLL_EN); 171 172 mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_CON0, 173 RG_DSI_MPPLL_TXDIV0 | RG_DSI_MPPLL_TXDIV1 | 174 RG_DSI_MPPLL_PREDIV, 175 (txdiv0 << 3) | (txdiv1 << 5)); 176 177 /* 178 * PLL PCW config 179 * PCW bit 24~30 = integer part of pcw 180 * PCW bit 0~23 = fractional part of pcw 181 * pcw = data_Rate*4*txdiv/(Ref_clk*2); 182 * Post DIV =4, so need data_Rate*4 183 * Ref_clk is 26MHz 184 */ 185 pcw = div_u64(((u64)mipi_tx->data_rate * 2 * txdiv) << 24, 186 26000000); 187 writel(pcw, mipi_tx->regs + MIPITX_DSI_PLL_CON2); 188 189 mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON1, 190 RG_DSI_MPPLL_SDM_FRA_EN); 191 192 mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON0, RG_DSI_MPPLL_PLL_EN); 193 194 usleep_range(20, 100); 195 196 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON1, 197 RG_DSI_MPPLL_SDM_SSC_EN); 198 199 mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_TOP, 200 RG_DSI_MPPLL_PRESERVE, 201 mipi_tx->driver_data->mppll_preserve); 202 203 return 0; 204 } 205 206 static void mtk_mipi_tx_pll_unprepare(struct clk_hw *hw) 207 { 208 struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw); 209 210 dev_dbg(mipi_tx->dev, "unprepare\n"); 211 212 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0, 213 RG_DSI_MPPLL_PLL_EN); 214 215 mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_TOP, 216 RG_DSI_MPPLL_PRESERVE, 0); 217 218 mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR, 219 RG_DSI_MPPLL_SDM_ISO_EN | 220 RG_DSI_MPPLL_SDM_PWR_ON, 221 RG_DSI_MPPLL_SDM_ISO_EN); 222 223 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON, 224 RG_DSI_LNT_HS_BIAS_EN); 225 226 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_CON, 227 RG_DSI_CKG_LDOOUT_EN | RG_DSI_LDOCORE_EN); 228 229 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_BG_CON, 230 RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN); 231 232 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0, 233 RG_DSI_MPPLL_DIV_MSK); 234 } 235 236 static long mtk_mipi_tx_pll_round_rate(struct clk_hw *hw, unsigned long rate, 237 unsigned long *prate) 238 { 239 return clamp_val(rate, 50000000, 1250000000); 240 } 241 242 static const struct clk_ops mtk_mipi_tx_pll_ops = { 243 .prepare = mtk_mipi_tx_pll_prepare, 244 .unprepare = mtk_mipi_tx_pll_unprepare, 245 .round_rate = mtk_mipi_tx_pll_round_rate, 246 .set_rate = mtk_mipi_tx_pll_set_rate, 247 .recalc_rate = mtk_mipi_tx_pll_recalc_rate, 248 }; 249 250 static void mtk_mipi_tx_power_on_signal(struct phy *phy) 251 { 252 struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy); 253 u32 reg; 254 255 for (reg = MIPITX_DSI_CLOCK_LANE; 256 reg <= MIPITX_DSI_DATA_LANE3; reg += 4) 257 mtk_mipi_tx_set_bits(mipi_tx, reg, RG_DSI_LNTx_LDOOUT_EN); 258 259 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON, 260 RG_DSI_PAD_TIE_LOW_EN); 261 } 262 263 static void mtk_mipi_tx_power_off_signal(struct phy *phy) 264 { 265 struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy); 266 u32 reg; 267 268 mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_TOP_CON, 269 RG_DSI_PAD_TIE_LOW_EN); 270 271 for (reg = MIPITX_DSI_CLOCK_LANE; 272 reg <= MIPITX_DSI_DATA_LANE3; reg += 4) 273 mtk_mipi_tx_clear_bits(mipi_tx, reg, RG_DSI_LNTx_LDOOUT_EN); 274 } 275 276 const struct mtk_mipitx_data mt2701_mipitx_data = { 277 .mppll_preserve = (3 << 8), 278 .mipi_tx_clk_ops = &mtk_mipi_tx_pll_ops, 279 .mipi_tx_enable_signal = mtk_mipi_tx_power_on_signal, 280 .mipi_tx_disable_signal = mtk_mipi_tx_power_off_signal, 281 }; 282 283 const struct mtk_mipitx_data mt8173_mipitx_data = { 284 .mppll_preserve = (0 << 8), 285 .mipi_tx_clk_ops = &mtk_mipi_tx_pll_ops, 286 .mipi_tx_enable_signal = mtk_mipi_tx_power_on_signal, 287 .mipi_tx_disable_signal = mtk_mipi_tx_power_off_signal, 288 }; 289