phy-mtk-hdmi-mt2701.c (9041B)
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 (0x3f << 0) 12#define RG_HDMITX_EN_SER 12 13#define RG_HDMITX_EN_SER_MASK (0x0f << 12) 14#define RG_HDMITX_EN_SLDO 16 15#define RG_HDMITX_EN_SLDO_MASK (0x0f << 16) 16#define RG_HDMITX_EN_PRED 20 17#define RG_HDMITX_EN_PRED_MASK (0x0f << 20) 18#define RG_HDMITX_EN_IMP 24 19#define RG_HDMITX_EN_IMP_MASK (0x0f << 24) 20#define RG_HDMITX_EN_DRV 28 21#define RG_HDMITX_EN_DRV_MASK (0x0f << 28) 22 23#define HDMI_CON1 0x04 24#define RG_HDMITX_PRED_IBIAS 18 25#define RG_HDMITX_PRED_IBIAS_MASK (0x0f << 18) 26#define RG_HDMITX_PRED_IMP (0x01 << 22) 27#define RG_HDMITX_DRV_IMP 26 28#define RG_HDMITX_DRV_IMP_MASK (0x3f << 26) 29 30#define HDMI_CON2 0x08 31#define RG_HDMITX_EN_TX_CKLDO (0x01 << 0) 32#define RG_HDMITX_EN_TX_POSDIV (0x01 << 1) 33#define RG_HDMITX_TX_POSDIV 3 34#define RG_HDMITX_TX_POSDIV_MASK (0x03 << 3) 35#define RG_HDMITX_EN_MBIAS (0x01 << 6) 36#define RG_HDMITX_MBIAS_LPF_EN (0x01 << 7) 37 38#define HDMI_CON4 0x10 39#define RG_HDMITX_RESERVE_MASK (0xffffffff << 0) 40 41#define HDMI_CON6 0x18 42#define RG_HTPLL_BR 0 43#define RG_HTPLL_BR_MASK (0x03 << 0) 44#define RG_HTPLL_BC 2 45#define RG_HTPLL_BC_MASK (0x03 << 2) 46#define RG_HTPLL_BP 4 47#define RG_HTPLL_BP_MASK (0x0f << 4) 48#define RG_HTPLL_IR 8 49#define RG_HTPLL_IR_MASK (0x0f << 8) 50#define RG_HTPLL_IC 12 51#define RG_HTPLL_IC_MASK (0x0f << 12) 52#define RG_HTPLL_POSDIV 16 53#define RG_HTPLL_POSDIV_MASK (0x03 << 16) 54#define RG_HTPLL_PREDIV 18 55#define RG_HTPLL_PREDIV_MASK (0x03 << 18) 56#define RG_HTPLL_FBKSEL 20 57#define RG_HTPLL_FBKSEL_MASK (0x03 << 20) 58#define RG_HTPLL_RLH_EN (0x01 << 22) 59#define RG_HTPLL_FBKDIV 24 60#define RG_HTPLL_FBKDIV_MASK (0x7f << 24) 61#define RG_HTPLL_EN (0x01 << 31) 62 63#define HDMI_CON7 0x1c 64#define RG_HTPLL_AUTOK_EN (0x01 << 23) 65#define RG_HTPLL_DIVEN 28 66#define RG_HTPLL_DIVEN_MASK (0x07 << 28) 67 68static 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 89static 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 109static long mtk_hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate, 110 unsigned long *parent_rate) 111{ 112 return rate; 113} 114 115static 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 162static 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 195static 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 203static 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 221static 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 239struct 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 247MODULE_AUTHOR("Chunhui Dai <chunhui.dai@mediatek.com>"); 248MODULE_DESCRIPTION("MediaTek HDMI PHY Driver"); 249MODULE_LICENSE("GPL v2");