drivers/phy/mediatek/phy-mtk-mipi-dsi-mt8183.c

   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-io.h"
   8 #include "phy-mtk-mipi-dsi.h"
   9
  10 #define MIPITX_LANE_CON         0x000c
  11 #define RG_DSI_CPHY_T1DRV_EN            BIT(0)
  12 #define RG_DSI_ANA_CK_SEL               BIT(1)
  13 #define RG_DSI_PHY_CK_SEL               BIT(2)
  14 #define RG_DSI_CPHY_EN                  BIT(3)
  15 #define RG_DSI_PHYCK_INV_EN             BIT(4)
  16 #define RG_DSI_PWR04_EN                 BIT(5)
  17 #define RG_DSI_BG_LPF_EN                BIT(6)
  18 #define RG_DSI_BG_CORE_EN               BIT(7)
  19 #define RG_DSI_PAD_TIEL_SEL             BIT(8)
  20
  21 #define MIPITX_VOLTAGE_SEL      0x0010
  22 #define RG_DSI_HSTX_LDO_REF_SEL         GENMASK(9, 6)
  23
  24 #define MIPITX_PLL_PWR          0x0028
  25 #define MIPITX_PLL_CON0         0x002c
  26 #define MIPITX_PLL_CON1         0x0030
  27 #define MIPITX_PLL_CON2         0x0034
  28 #define MIPITX_PLL_CON3         0x0038
  29 #define MIPITX_PLL_CON4         0x003c
  30 #define RG_DSI_PLL_IBIAS                GENMASK(11, 10)
  31
  32 #define MIPITX_D2P_RTCODE       0x0100
  33 #define MIPITX_D2_SW_CTL_EN     0x0144
  34 #define MIPITX_D0_SW_CTL_EN     0x0244
  35 #define MIPITX_CK_CKMODE_EN     0x0328
  36 #define DSI_CK_CKMODE_EN                BIT(0)
  37 #define MIPITX_CK_SW_CTL_EN     0x0344
  38 #define MIPITX_D1_SW_CTL_EN     0x0444
  39 #define MIPITX_D3_SW_CTL_EN     0x0544
  40 #define DSI_SW_CTL_EN                   BIT(0)
  41 #define AD_DSI_PLL_SDM_PWR_ON           BIT(0)
  42 #define AD_DSI_PLL_SDM_ISO_EN           BIT(1)
  43
  44 #define RG_DSI_PLL_EN                   BIT(4)
  45 #define RG_DSI_PLL_POSDIV               GENMASK(10, 8)
  46
  47 static int mtk_mipi_tx_pll_enable(struct clk_hw *hw)
  48 {
  49         struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
  50         void __iomem *base = mipi_tx->regs;
  51         unsigned int txdiv, txdiv0;
  52         u64 pcw;
  53
  54         dev_dbg(mipi_tx->dev, "enable: %u bps\n", mipi_tx->data_rate);
  55
  56         if (mipi_tx->data_rate >= 2000000000) {
  57                 txdiv = 1;
  58                 txdiv0 = 0;
  59         } else if (mipi_tx->data_rate >= 1000000000) {
  60                 txdiv = 2;
  61                 txdiv0 = 1;
  62         } else if (mipi_tx->data_rate >= 500000000) {
  63                 txdiv = 4;
  64                 txdiv0 = 2;
  65         } else if (mipi_tx->data_rate > 250000000) {
  66                 txdiv = 8;
  67                 txdiv0 = 3;
  68         } else if (mipi_tx->data_rate >= 125000000) {
  69                 txdiv = 16;
  70                 txdiv0 = 4;
  71         } else {
  72                 return -EINVAL;
  73         }
  74
  75         mtk_phy_clear_bits(base + MIPITX_PLL_CON4, RG_DSI_PLL_IBIAS);
  76
  77         mtk_phy_set_bits(base + MIPITX_PLL_PWR, AD_DSI_PLL_SDM_PWR_ON);
  78         mtk_phy_clear_bits(base + MIPITX_PLL_CON1, RG_DSI_PLL_EN);
  79         udelay(1);
  80         mtk_phy_clear_bits(base + MIPITX_PLL_PWR, AD_DSI_PLL_SDM_ISO_EN);
  81         pcw = div_u64(((u64)mipi_tx->data_rate * txdiv) << 24, 26000000);
  82         writel(pcw, base + MIPITX_PLL_CON0);
  83         mtk_phy_update_field(base + MIPITX_PLL_CON1, RG_DSI_PLL_POSDIV, txdiv0);
  84         mtk_phy_set_bits(base + MIPITX_PLL_CON1, RG_DSI_PLL_EN);
  85
  86         return 0;
  87 }
  88
  89 static void mtk_mipi_tx_pll_disable(struct clk_hw *hw)
  90 {
  91         struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
  92         void __iomem *base = mipi_tx->regs;
  93
  94         mtk_phy_clear_bits(base + MIPITX_PLL_CON1, RG_DSI_PLL_EN);
  95
  96         mtk_phy_set_bits(base + MIPITX_PLL_PWR, AD_DSI_PLL_SDM_ISO_EN);
  97         mtk_phy_clear_bits(base + MIPITX_PLL_PWR, AD_DSI_PLL_SDM_PWR_ON);
  98 }
  99
 100 static long mtk_mipi_tx_pll_round_rate(struct clk_hw *hw, unsigned long rate,
 101                                        unsigned long *prate)
 102 {
 103         return clamp_val(rate, 50000000, 1600000000);
 104 }
 105
 106 static const struct clk_ops mtk_mipi_tx_pll_ops = {
 107         .enable = mtk_mipi_tx_pll_enable,
 108         .disable = mtk_mipi_tx_pll_disable,
 109         .round_rate = mtk_mipi_tx_pll_round_rate,
 110         .set_rate = mtk_mipi_tx_pll_set_rate,
 111         .recalc_rate = mtk_mipi_tx_pll_recalc_rate,
 112 };
 113
 114 static void mtk_mipi_tx_config_calibration_data(struct mtk_mipi_tx *mipi_tx)
 115 {
 116         int i, j;
 117
 118         for (i = 0; i < 5; i++) {
 119                 if ((mipi_tx->rt_code[i] & 0x1f) == 0)
 120                         mipi_tx->rt_code[i] |= 0x10;
 121
 122                 if ((mipi_tx->rt_code[i] >> 5 & 0x1f) == 0)
 123                         mipi_tx->rt_code[i] |= 0x10 << 5;
 124
 125                 for (j = 0; j < 10; j++)
 126                         mtk_phy_update_bits(mipi_tx->regs +
 127                                 MIPITX_D2P_RTCODE * (i + 1) + j * 4,
 128                                 1, mipi_tx->rt_code[i] >> j & 1);
 129         }
 130 }
 131
 132 static void mtk_mipi_tx_power_on_signal(struct phy *phy)
 133 {
 134         struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
 135         void __iomem *base = mipi_tx->regs;
 136
 137         /* BG_LPF_EN / BG_CORE_EN */
 138         writel(RG_DSI_PAD_TIEL_SEL | RG_DSI_BG_CORE_EN, base + MIPITX_LANE_CON);
 139         usleep_range(30, 100);
 140         writel(RG_DSI_BG_CORE_EN | RG_DSI_BG_LPF_EN, base + MIPITX_LANE_CON);
 141
 142         /* Switch OFF each Lane */
 143         mtk_phy_clear_bits(base + MIPITX_D0_SW_CTL_EN, DSI_SW_CTL_EN);
 144         mtk_phy_clear_bits(base + MIPITX_D1_SW_CTL_EN, DSI_SW_CTL_EN);
 145         mtk_phy_clear_bits(base + MIPITX_D2_SW_CTL_EN, DSI_SW_CTL_EN);
 146         mtk_phy_clear_bits(base + MIPITX_D3_SW_CTL_EN, DSI_SW_CTL_EN);
 147         mtk_phy_clear_bits(base + MIPITX_CK_SW_CTL_EN, DSI_SW_CTL_EN);
 148
 149         mtk_phy_update_field(base + MIPITX_VOLTAGE_SEL, RG_DSI_HSTX_LDO_REF_SEL,
 150                              (mipi_tx->mipitx_drive - 3000) / 200);
 151
 152         mtk_mipi_tx_config_calibration_data(mipi_tx);
 153
 154         mtk_phy_set_bits(base + MIPITX_CK_CKMODE_EN, DSI_CK_CKMODE_EN);
 155 }
 156
 157 static void mtk_mipi_tx_power_off_signal(struct phy *phy)
 158 {
 159         struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
 160         void __iomem *base = mipi_tx->regs;
 161
 162         /* Switch ON each Lane */
 163         mtk_phy_set_bits(base + MIPITX_D0_SW_CTL_EN, DSI_SW_CTL_EN);
 164         mtk_phy_set_bits(base + MIPITX_D1_SW_CTL_EN, DSI_SW_CTL_EN);
 165         mtk_phy_set_bits(base + MIPITX_D2_SW_CTL_EN, DSI_SW_CTL_EN);
 166         mtk_phy_set_bits(base + MIPITX_D3_SW_CTL_EN, DSI_SW_CTL_EN);
 167         mtk_phy_set_bits(base + MIPITX_CK_SW_CTL_EN, DSI_SW_CTL_EN);
 168
 169         writel(RG_DSI_PAD_TIEL_SEL | RG_DSI_BG_CORE_EN, base + MIPITX_LANE_CON);
 170         writel(RG_DSI_PAD_TIEL_SEL, base + MIPITX_LANE_CON);
 171 }
 172
 173 const struct mtk_mipitx_data mt8183_mipitx_data = {
 174         .mipi_tx_clk_ops = &mtk_mipi_tx_pll_ops,
 175         .mipi_tx_enable_signal = mtk_mipi_tx_power_on_signal,
 176         .mipi_tx_disable_signal = mtk_mipi_tx_power_off_signal,
 177 };