drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c

   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 "mtk_hdmi_phy.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
  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_CON2, RG_HDMITX_EN_TX_POSDIV);
  83         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_SER_MASK);
  84         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_PRED_MASK);
  85         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_DRV_MASK);
  86         usleep_range(80, 100);
  87         return 0;
  88 }
  89
  90 static void mtk_hdmi_pll_unprepare(struct clk_hw *hw)
  91 {
  92         struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
  93
  94         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_DRV_MASK);
  95         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_PRED_MASK);
  96         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_SER_MASK);
  97         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_TX_POSDIV);
  98         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_MBIAS_LPF_EN);
  99         usleep_range(80, 100);
 100         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_SLDO_MASK);
 101         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_TX_CKLDO);
 102         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_EN);
 103         usleep_range(80, 100);
 104         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_MBIAS);
 105         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_POSDIV_MASK);
 106         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_RLH_EN);
 107         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON7, RG_HTPLL_AUTOK_EN);
 108         usleep_range(80, 100);
 109 }
 110
 111 static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate,
 112                                  unsigned long parent_rate)
 113 {
 114         struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
 115         u32 pos_div;
 116
 117         if (rate <= 64000000)
 118                 pos_div = 3;
 119         else if (rate <= 12800000)
 120                 pos_div = 1;
 121         else
 122                 pos_div = 1;
 123
 124         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_PREDIV_MASK);
 125         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_POSDIV_MASK);
 126         mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6, (0x1 << RG_HTPLL_IC),
 127                           RG_HTPLL_IC_MASK);
 128         mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6, (0x1 << RG_HTPLL_IR),
 129                           RG_HTPLL_IR_MASK);
 130         mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON2, (pos_div << RG_HDMITX_TX_POSDIV),
 131                           RG_HDMITX_TX_POSDIV_MASK);
 132         mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6, (1 << RG_HTPLL_FBKSEL),
 133                           RG_HTPLL_FBKSEL_MASK);
 134         mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6, (19 << RG_HTPLL_FBKDIV),
 135                           RG_HTPLL_FBKDIV_MASK);
 136         mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON7, (0x2 << RG_HTPLL_DIVEN),
 137                           RG_HTPLL_DIVEN_MASK);
 138         mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6, (0xc << RG_HTPLL_BP),
 139                           RG_HTPLL_BP_MASK);
 140         mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6, (0x2 << RG_HTPLL_BC),
 141                           RG_HTPLL_BC_MASK);
 142         mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6, (0x1 << RG_HTPLL_BR),
 143                           RG_HTPLL_BR_MASK);
 144
 145         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON1, RG_HDMITX_PRED_IMP);
 146         mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON1, (0x3 << RG_HDMITX_PRED_IBIAS),
 147                           RG_HDMITX_PRED_IBIAS_MASK);
 148         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_IMP_MASK);
 149         mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON1, (0x28 << RG_HDMITX_DRV_IMP),
 150                           RG_HDMITX_DRV_IMP_MASK);
 151         mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON4, 0x28, RG_HDMITX_RESERVE_MASK);
 152         mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON0, (0xa << RG_HDMITX_DRV_IBIAS),
 153                           RG_HDMITX_DRV_IBIAS_MASK);
 154         return 0;
 155 }
 156
 157 static const struct clk_ops mtk_hdmi_phy_pll_ops = {
 158         .prepare = mtk_hdmi_pll_prepare,
 159         .unprepare = mtk_hdmi_pll_unprepare,
 160         .set_rate = mtk_hdmi_pll_set_rate,
 161         .round_rate = mtk_hdmi_pll_round_rate,
 162         .recalc_rate = mtk_hdmi_pll_recalc_rate,
 163 };
 164
 165 static void mtk_hdmi_phy_enable_tmds(struct mtk_hdmi_phy *hdmi_phy)
 166 {
 167         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON7, RG_HTPLL_AUTOK_EN);
 168         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_RLH_EN);
 169         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_POSDIV_MASK);
 170         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_MBIAS);
 171         usleep_range(80, 100);
 172         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_EN);
 173         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_TX_CKLDO);
 174         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_SLDO_MASK);
 175         usleep_range(80, 100);
 176         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_MBIAS_LPF_EN);
 177         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_TX_POSDIV);
 178         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_SER_MASK);
 179         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_PRED_MASK);
 180         mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_DRV_MASK);
 181         usleep_range(80, 100);
 182 }
 183
 184 static void mtk_hdmi_phy_disable_tmds(struct mtk_hdmi_phy *hdmi_phy)
 185 {
 186         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_DRV_MASK);
 187         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_PRED_MASK);
 188         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_SER_MASK);
 189         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_TX_POSDIV);
 190         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_MBIAS_LPF_EN);
 191         usleep_range(80, 100);
 192         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON0, RG_HDMITX_EN_SLDO_MASK);
 193         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_TX_CKLDO);
 194         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_EN);
 195         usleep_range(80, 100);
 196         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON2, RG_HDMITX_EN_MBIAS);
 197         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_POSDIV_MASK);
 198         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON6, RG_HTPLL_RLH_EN);
 199         mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON7, RG_HTPLL_AUTOK_EN);
 200         usleep_range(80, 100);
 201 }
 202
 203 struct mtk_hdmi_phy_conf mtk_hdmi_phy_2701_conf = {
 204         .tz_disabled = true,
 205         .hdmi_phy_clk_ops = &mtk_hdmi_phy_pll_ops,
 206         .hdmi_phy_enable_tmds = mtk_hdmi_phy_enable_tmds,
 207         .hdmi_phy_disable_tmds = mtk_hdmi_phy_disable_tmds,
 208 };
 209
 210 MODULE_AUTHOR("Chunhui Dai <chunhui.dai@mediatek.com>");
 211 MODULE_DESCRIPTION("MediaTek HDMI PHY Driver");
 212 MODULE_LICENSE("GPL v2");