1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2019 MediaTek Inc.
4 * Author: jitao.shi <jitao.shi@mediatek.com>
7 #include "phy-mtk-mipi-dsi.h"
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 GENMASK(3, 2)
13 #define RG_DSI_LD_IDX_SEL GENMASK(6, 4)
14 #define RG_DSI_PHYCLK_SEL GENMASK(9, 8)
15 #define RG_DSI_DSICLK_FREQ_SEL BIT(10)
16 #define RG_DSI_LPTX_CLMP_EN BIT(11)
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 GENMASK(11, 8)
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 GENMASK(7, 4)
38 #define RG_DSI_LNT_AIO_SEL GENMASK(10, 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 GENMASK(15, 13)
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 GENMASK(3, 2)
47 #define RG_DSI_BG_FAST_CHARGE BIT(4)
49 #define RG_DSI_V12_SEL GENMASK(7, 5)
50 #define RG_DSI_V10_SEL GENMASK(10, 8)
51 #define RG_DSI_V072_SEL GENMASK(13, 11)
52 #define RG_DSI_V04_SEL GENMASK(16, 14)
53 #define RG_DSI_V032_SEL GENMASK(19, 17)
54 #define RG_DSI_V02_SEL GENMASK(22, 20)
55 #define RG_DSI_VOUT_MSK \
56 (RG_DSI_V12_SEL | RG_DSI_V10_SEL | RG_DSI_V072_SEL | \
57 RG_DSI_V04_SEL | RG_DSI_V032_SEL | RG_DSI_V02_SEL)
58 #define RG_DSI_BG_R1_TRIM GENMASK(27, 24)
59 #define RG_DSI_BG_R2_TRIM GENMASK(31, 28)
61 #define MIPITX_DSI_PLL_CON0 0x50
62 #define RG_DSI_MPPLL_PLL_EN BIT(0)
63 #define RG_DSI_MPPLL_PREDIV GENMASK(2, 1)
64 #define RG_DSI_MPPLL_TXDIV0 GENMASK(4, 3)
65 #define RG_DSI_MPPLL_TXDIV1 GENMASK(6, 5)
66 #define RG_DSI_MPPLL_POSDIV GENMASK(9, 7)
67 #define RG_DSI_MPPLL_DIV_MSK \
68 (RG_DSI_MPPLL_PREDIV | RG_DSI_MPPLL_TXDIV0 | \
69 RG_DSI_MPPLL_TXDIV1 | RG_DSI_MPPLL_POSDIV)
70 #define RG_DSI_MPPLL_MONVC_EN BIT(10)
71 #define RG_DSI_MPPLL_MONREF_EN BIT(11)
72 #define RG_DSI_MPPLL_VOD_EN BIT(12)
74 #define MIPITX_DSI_PLL_CON1 0x54
75 #define RG_DSI_MPPLL_SDM_FRA_EN BIT(0)
76 #define RG_DSI_MPPLL_SDM_SSC_PH_INIT BIT(1)
77 #define RG_DSI_MPPLL_SDM_SSC_EN BIT(2)
78 #define RG_DSI_MPPLL_SDM_SSC_PRD GENMASK(31, 16)
80 #define MIPITX_DSI_PLL_CON2 0x58
82 #define MIPITX_DSI_PLL_TOP 0x64
83 #define RG_DSI_MPPLL_PRESERVE GENMASK(15, 8)
85 #define MIPITX_DSI_PLL_PWR 0x68
86 #define RG_DSI_MPPLL_SDM_PWR_ON BIT(0)
87 #define RG_DSI_MPPLL_SDM_ISO_EN BIT(1)
88 #define RG_DSI_MPPLL_SDM_PWR_ACK BIT(8)
90 #define MIPITX_DSI_SW_CTRL 0x80
91 #define SW_CTRL_EN BIT(0)
93 #define MIPITX_DSI_SW_CTRL_CON0 0x84
94 #define SW_LNTC_LPTX_PRE_OE BIT(0)
95 #define SW_LNTC_LPTX_OE BIT(1)
96 #define SW_LNTC_LPTX_P BIT(2)
97 #define SW_LNTC_LPTX_N BIT(3)
98 #define SW_LNTC_HSTX_PRE_OE BIT(4)
99 #define SW_LNTC_HSTX_OE BIT(5)
100 #define SW_LNTC_HSTX_ZEROCLK BIT(6)
101 #define SW_LNT0_LPTX_PRE_OE BIT(7)
102 #define SW_LNT0_LPTX_OE BIT(8)
103 #define SW_LNT0_LPTX_P BIT(9)
104 #define SW_LNT0_LPTX_N BIT(10)
105 #define SW_LNT0_HSTX_PRE_OE BIT(11)
106 #define SW_LNT0_HSTX_OE BIT(12)
107 #define SW_LNT0_LPRX_EN BIT(13)
108 #define SW_LNT1_LPTX_PRE_OE BIT(14)
109 #define SW_LNT1_LPTX_OE BIT(15)
110 #define SW_LNT1_LPTX_P BIT(16)
111 #define SW_LNT1_LPTX_N BIT(17)
112 #define SW_LNT1_HSTX_PRE_OE BIT(18)
113 #define SW_LNT1_HSTX_OE BIT(19)
114 #define SW_LNT2_LPTX_PRE_OE BIT(20)
115 #define SW_LNT2_LPTX_OE BIT(21)
116 #define SW_LNT2_LPTX_P BIT(22)
117 #define SW_LNT2_LPTX_N BIT(23)
118 #define SW_LNT2_HSTX_PRE_OE BIT(24)
119 #define SW_LNT2_HSTX_OE BIT(25)
121 static int mtk_mipi_tx_pll_prepare(struct clk_hw *hw)
123 struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
124 u8 txdiv, txdiv0, txdiv1;
127 dev_dbg(mipi_tx->dev, "prepare: %u Hz\n", mipi_tx->data_rate);
129 if (mipi_tx->data_rate >= 500000000) {
133 } else if (mipi_tx->data_rate >= 250000000) {
137 } else if (mipi_tx->data_rate >= 125000000) {
141 } else if (mipi_tx->data_rate > 62000000) {
145 } else if (mipi_tx->data_rate >= 50000000) {
153 mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_BG_CON,
155 RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN,
156 FIELD_PREP(RG_DSI_V02_SEL, 4) |
157 FIELD_PREP(RG_DSI_V032_SEL, 4) |
158 FIELD_PREP(RG_DSI_V04_SEL, 4) |
159 FIELD_PREP(RG_DSI_V072_SEL, 4) |
160 FIELD_PREP(RG_DSI_V10_SEL, 4) |
161 FIELD_PREP(RG_DSI_V12_SEL, 4) |
162 RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN);
164 usleep_range(30, 100);
166 mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_TOP_CON,
167 RG_DSI_LNT_IMP_CAL_CODE | RG_DSI_LNT_HS_BIAS_EN,
168 FIELD_PREP(RG_DSI_LNT_IMP_CAL_CODE, 8) |
169 RG_DSI_LNT_HS_BIAS_EN);
171 mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_CON,
172 RG_DSI_CKG_LDOOUT_EN | RG_DSI_LDOCORE_EN);
174 mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR,
175 RG_DSI_MPPLL_SDM_PWR_ON |
176 RG_DSI_MPPLL_SDM_ISO_EN,
177 RG_DSI_MPPLL_SDM_PWR_ON);
179 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
180 RG_DSI_MPPLL_PLL_EN);
182 mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
183 RG_DSI_MPPLL_TXDIV0 | RG_DSI_MPPLL_TXDIV1 |
185 FIELD_PREP(RG_DSI_MPPLL_TXDIV0, txdiv0) |
186 FIELD_PREP(RG_DSI_MPPLL_TXDIV1, txdiv1));
190 * PCW bit 24~30 = integer part of pcw
191 * PCW bit 0~23 = fractional part of pcw
192 * pcw = data_Rate*4*txdiv/(Ref_clk*2);
193 * Post DIV =4, so need data_Rate*4
196 pcw = div_u64(((u64)mipi_tx->data_rate * 2 * txdiv) << 24,
198 writel(pcw, mipi_tx->regs + MIPITX_DSI_PLL_CON2);
200 mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON1,
201 RG_DSI_MPPLL_SDM_FRA_EN);
203 mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON0, RG_DSI_MPPLL_PLL_EN);
205 usleep_range(20, 100);
207 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON1,
208 RG_DSI_MPPLL_SDM_SSC_EN);
210 mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_TOP,
211 RG_DSI_MPPLL_PRESERVE,
212 mipi_tx->driver_data->mppll_preserve);
217 static void mtk_mipi_tx_pll_unprepare(struct clk_hw *hw)
219 struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
221 dev_dbg(mipi_tx->dev, "unprepare\n");
223 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
224 RG_DSI_MPPLL_PLL_EN);
226 mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_TOP,
227 RG_DSI_MPPLL_PRESERVE, 0);
229 mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR,
230 RG_DSI_MPPLL_SDM_ISO_EN |
231 RG_DSI_MPPLL_SDM_PWR_ON,
232 RG_DSI_MPPLL_SDM_ISO_EN);
234 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON,
235 RG_DSI_LNT_HS_BIAS_EN);
237 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_CON,
238 RG_DSI_CKG_LDOOUT_EN | RG_DSI_LDOCORE_EN);
240 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_BG_CON,
241 RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN);
243 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
244 RG_DSI_MPPLL_DIV_MSK);
247 static long mtk_mipi_tx_pll_round_rate(struct clk_hw *hw, unsigned long rate,
248 unsigned long *prate)
250 return clamp_val(rate, 50000000, 1250000000);
253 static const struct clk_ops mtk_mipi_tx_pll_ops = {
254 .prepare = mtk_mipi_tx_pll_prepare,
255 .unprepare = mtk_mipi_tx_pll_unprepare,
256 .round_rate = mtk_mipi_tx_pll_round_rate,
257 .set_rate = mtk_mipi_tx_pll_set_rate,
258 .recalc_rate = mtk_mipi_tx_pll_recalc_rate,
261 static void mtk_mipi_tx_power_on_signal(struct phy *phy)
263 struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
266 for (reg = MIPITX_DSI_CLOCK_LANE;
267 reg <= MIPITX_DSI_DATA_LANE3; reg += 4)
268 mtk_mipi_tx_set_bits(mipi_tx, reg, RG_DSI_LNTx_LDOOUT_EN);
270 mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON,
271 RG_DSI_PAD_TIE_LOW_EN);
274 static void mtk_mipi_tx_power_off_signal(struct phy *phy)
276 struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
279 mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_TOP_CON,
280 RG_DSI_PAD_TIE_LOW_EN);
282 for (reg = MIPITX_DSI_CLOCK_LANE;
283 reg <= MIPITX_DSI_DATA_LANE3; reg += 4)
284 mtk_mipi_tx_clear_bits(mipi_tx, reg, RG_DSI_LNTx_LDOOUT_EN);
287 const struct mtk_mipitx_data mt2701_mipitx_data = {
288 .mppll_preserve = (3 << 8),
289 .mipi_tx_clk_ops = &mtk_mipi_tx_pll_ops,
290 .mipi_tx_enable_signal = mtk_mipi_tx_power_on_signal,
291 .mipi_tx_disable_signal = mtk_mipi_tx_power_off_signal,
294 const struct mtk_mipitx_data mt8173_mipitx_data = {
295 .mppll_preserve = (0 << 8),
296 .mipi_tx_clk_ops = &mtk_mipi_tx_pll_ops,
297 .mipi_tx_enable_signal = mtk_mipi_tx_power_on_signal,
298 .mipi_tx_disable_signal = mtk_mipi_tx_power_off_signal,