1 /* 2 * SPDX-License-Identifier: GPL-2.0 3 * Copyright (c) 2018, The Linux Foundation 4 */ 5 6 #include <linux/iopoll.h> 7 8 #include "dsi_phy.h" 9 #include "dsi.xml.h" 10 11 static int dsi_phy_hw_v3_0_is_pll_on(struct msm_dsi_phy *phy) 12 { 13 void __iomem *base = phy->base; 14 u32 data = 0; 15 16 data = dsi_phy_read(base + REG_DSI_10nm_PHY_CMN_PLL_CNTRL); 17 mb(); /* make sure read happened */ 18 19 return (data & BIT(0)); 20 } 21 22 static void dsi_phy_hw_v3_0_config_lpcdrx(struct msm_dsi_phy *phy, bool enable) 23 { 24 void __iomem *lane_base = phy->lane_base; 25 int phy_lane_0 = 0; /* TODO: Support all lane swap configs */ 26 27 /* 28 * LPRX and CDRX need to enabled only for physical data lane 29 * corresponding to the logical data lane 0 30 */ 31 if (enable) 32 dsi_phy_write(lane_base + 33 REG_DSI_10nm_PHY_LN_LPRX_CTRL(phy_lane_0), 0x3); 34 else 35 dsi_phy_write(lane_base + 36 REG_DSI_10nm_PHY_LN_LPRX_CTRL(phy_lane_0), 0); 37 } 38 39 static void dsi_phy_hw_v3_0_lane_settings(struct msm_dsi_phy *phy) 40 { 41 int i; 42 u8 tx_dctrl[] = { 0x00, 0x00, 0x00, 0x04, 0x01 }; 43 void __iomem *lane_base = phy->lane_base; 44 45 /* Strength ctrl settings */ 46 for (i = 0; i < 5; i++) { 47 dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_LPTX_STR_CTRL(i), 48 0x55); 49 /* 50 * Disable LPRX and CDRX for all lanes. And later on, it will 51 * be only enabled for the physical data lane corresponding 52 * to the logical data lane 0 53 */ 54 dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_LPRX_CTRL(i), 0); 55 dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_PIN_SWAP(i), 0x0); 56 dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_HSTX_STR_CTRL(i), 57 0x88); 58 } 59 60 dsi_phy_hw_v3_0_config_lpcdrx(phy, true); 61 62 /* other settings */ 63 for (i = 0; i < 5; i++) { 64 dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_CFG0(i), 0x0); 65 dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_CFG1(i), 0x0); 66 dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_CFG2(i), 0x0); 67 dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_CFG3(i), 68 i == 4 ? 0x80 : 0x0); 69 dsi_phy_write(lane_base + 70 REG_DSI_10nm_PHY_LN_OFFSET_TOP_CTRL(i), 0x0); 71 dsi_phy_write(lane_base + 72 REG_DSI_10nm_PHY_LN_OFFSET_BOT_CTRL(i), 0x0); 73 dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_TX_DCTRL(i), 74 tx_dctrl[i]); 75 } 76 77 /* Toggle BIT 0 to release freeze I/0 */ 78 dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_TX_DCTRL(3), 0x05); 79 dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_TX_DCTRL(3), 0x04); 80 } 81 82 static int dsi_10nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id, 83 struct msm_dsi_phy_clk_request *clk_req) 84 { 85 int ret; 86 u32 status; 87 u32 const delay_us = 5; 88 u32 const timeout_us = 1000; 89 struct msm_dsi_dphy_timing *timing = &phy->timing; 90 void __iomem *base = phy->base; 91 u32 data; 92 93 DBG(""); 94 95 if (msm_dsi_dphy_timing_calc_v3(timing, clk_req)) { 96 dev_err(&phy->pdev->dev, 97 "%s: D-PHY timing calculation failed\n", __func__); 98 return -EINVAL; 99 } 100 101 if (dsi_phy_hw_v3_0_is_pll_on(phy)) 102 pr_warn("PLL turned on before configuring PHY\n"); 103 104 /* wait for REFGEN READY */ 105 ret = readl_poll_timeout_atomic(base + REG_DSI_10nm_PHY_CMN_PHY_STATUS, 106 status, (status & BIT(0)), 107 delay_us, timeout_us); 108 if (ret) { 109 pr_err("Ref gen not ready. Aborting\n"); 110 return -EINVAL; 111 } 112 113 /* de-assert digital and pll power down */ 114 data = BIT(6) | BIT(5); 115 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_CTRL_0, data); 116 117 /* Assert PLL core reset */ 118 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_PLL_CNTRL, 0x00); 119 120 /* turn off resync FIFO */ 121 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_RBUF_CTRL, 0x00); 122 123 /* Select MS1 byte-clk */ 124 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_GLBL_CTRL, 0x10); 125 126 /* Enable LDO */ 127 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_VREG_CTRL, 0x59); 128 129 /* Configure PHY lane swap (TODO: we need to calculate this) */ 130 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_LANE_CFG0, 0x21); 131 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_LANE_CFG1, 0x84); 132 133 /* DSI PHY timings */ 134 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_0, 135 timing->hs_halfbyte_en); 136 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_1, 137 timing->clk_zero); 138 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_2, 139 timing->clk_prepare); 140 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_3, 141 timing->clk_trail); 142 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_4, 143 timing->hs_exit); 144 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_5, 145 timing->hs_zero); 146 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_6, 147 timing->hs_prepare); 148 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_7, 149 timing->hs_trail); 150 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_8, 151 timing->hs_rqst); 152 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_9, 153 timing->ta_go | (timing->ta_sure << 3)); 154 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_10, 155 timing->ta_get); 156 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_11, 157 0x00); 158 159 /* Remove power down from all blocks */ 160 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_CTRL_0, 0x7f); 161 162 /* power up lanes */ 163 data = dsi_phy_read(base + REG_DSI_10nm_PHY_CMN_CTRL_0); 164 165 /* TODO: only power up lanes that are used */ 166 data |= 0x1F; 167 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_CTRL_0, data); 168 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_LANE_CTRL0, 0x1F); 169 170 /* Select full-rate mode */ 171 dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_CTRL_2, 0x40); 172 173 ret = msm_dsi_pll_set_usecase(phy->pll, phy->usecase); 174 if (ret) { 175 dev_err(&phy->pdev->dev, "%s: set pll usecase failed, %d\n", 176 __func__, ret); 177 return ret; 178 } 179 180 /* DSI lane settings */ 181 dsi_phy_hw_v3_0_lane_settings(phy); 182 183 DBG("DSI%d PHY enabled", phy->id); 184 185 return 0; 186 } 187 188 static void dsi_10nm_phy_disable(struct msm_dsi_phy *phy) 189 { 190 } 191 192 static int dsi_10nm_phy_init(struct msm_dsi_phy *phy) 193 { 194 struct platform_device *pdev = phy->pdev; 195 196 phy->lane_base = msm_ioremap(pdev, "dsi_phy_lane", 197 "DSI_PHY_LANE"); 198 if (IS_ERR(phy->lane_base)) { 199 dev_err(&pdev->dev, "%s: failed to map phy lane base\n", 200 __func__); 201 return -ENOMEM; 202 } 203 204 return 0; 205 } 206 207 const struct msm_dsi_phy_cfg dsi_phy_10nm_cfgs = { 208 .type = MSM_DSI_PHY_10NM, 209 .src_pll_truthtable = { {false, false}, {true, false} }, 210 .reg_cfg = { 211 .num = 1, 212 .regs = { 213 {"vdds", 36000, 32}, 214 }, 215 }, 216 .ops = { 217 .enable = dsi_10nm_phy_enable, 218 .disable = dsi_10nm_phy_disable, 219 .init = dsi_10nm_phy_init, 220 }, 221 .io_start = { 0xae94400, 0xae96400 }, 222 .num_dsi_phy = 2, 223 }; 224