drivers/phy/rockchip/phy-rockchip-inno-dsidphy.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2018 Rockchip Electronics Co. Ltd.
   4  *
   5  * Author: Wyon Bi <bivvy.bi@rock-chips.com>
   6  */
   7
   8 #include <linux/kernel.h>
   9 #include <linux/clk.h>
  10 #include <linux/iopoll.h>
  11 #include <linux/clk-provider.h>
  12 #include <linux/delay.h>
  13 #include <linux/init.h>
  14 #include <linux/module.h>
  15 #include <linux/of_device.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/reset.h>
  18 #include <linux/phy/phy.h>
  19 #include <linux/phy/phy-mipi-dphy.h>
  20 #include <linux/pm_runtime.h>
  21 #include <linux/mfd/syscon.h>
  22
  23 #define PSEC_PER_SEC    1000000000000LL
  24
  25 #define UPDATE(x, h, l) (((x) << (l)) & GENMASK((h), (l)))
  26
  27 /*
  28  * The offset address[7:0] is distributed two parts, one from the bit7 to bit5
  29  * is the first address, the other from the bit4 to bit0 is the second address.
  30  * when you configure the registers, you must set both of them. The Clock Lane
  31  * and Data Lane use the same registers with the same second address, but the
  32  * first address is different.
  33  */
  34 #define FIRST_ADDRESS(x)                (((x) & 0x7) << 5)
  35 #define SECOND_ADDRESS(x)               (((x) & 0x1f) << 0)
  36 #define PHY_REG(first, second)          (FIRST_ADDRESS(first) | \
  37                                          SECOND_ADDRESS(second))
  38
  39 /* Analog Register Part: reg00 */
  40 #define BANDGAP_POWER_MASK                      BIT(7)
  41 #define BANDGAP_POWER_DOWN                      BIT(7)
  42 #define BANDGAP_POWER_ON                        0
  43 #define LANE_EN_MASK                            GENMASK(6, 2)
  44 #define LANE_EN_CK                              BIT(6)
  45 #define LANE_EN_3                               BIT(5)
  46 #define LANE_EN_2                               BIT(4)
  47 #define LANE_EN_1                               BIT(3)
  48 #define LANE_EN_0                               BIT(2)
  49 #define POWER_WORK_MASK                         GENMASK(1, 0)
  50 #define POWER_WORK_ENABLE                       UPDATE(1, 1, 0)
  51 #define POWER_WORK_DISABLE                      UPDATE(2, 1, 0)
  52 /* Analog Register Part: reg01 */
  53 #define REG_SYNCRST_MASK                        BIT(2)
  54 #define REG_SYNCRST_RESET                       BIT(2)
  55 #define REG_SYNCRST_NORMAL                      0
  56 #define REG_LDOPD_MASK                          BIT(1)
  57 #define REG_LDOPD_POWER_DOWN                    BIT(1)
  58 #define REG_LDOPD_POWER_ON                      0
  59 #define REG_PLLPD_MASK                          BIT(0)
  60 #define REG_PLLPD_POWER_DOWN                    BIT(0)
  61 #define REG_PLLPD_POWER_ON                      0
  62 /* Analog Register Part: reg03 */
  63 #define REG_FBDIV_HI_MASK                       BIT(5)
  64 #define REG_FBDIV_HI(x)                         UPDATE((x >> 8), 5, 5)
  65 #define REG_PREDIV_MASK                         GENMASK(4, 0)
  66 #define REG_PREDIV(x)                           UPDATE(x, 4, 0)
  67 /* Analog Register Part: reg04 */
  68 #define REG_FBDIV_LO_MASK                       GENMASK(7, 0)
  69 #define REG_FBDIV_LO(x)                         UPDATE(x, 7, 0)
  70 /* Analog Register Part: reg05 */
  71 #define SAMPLE_CLOCK_PHASE_MASK                 GENMASK(6, 4)
  72 #define SAMPLE_CLOCK_PHASE(x)                   UPDATE(x, 6, 4)
  73 #define CLOCK_LANE_SKEW_PHASE_MASK              GENMASK(2, 0)
  74 #define CLOCK_LANE_SKEW_PHASE(x)                UPDATE(x, 2, 0)
  75 /* Analog Register Part: reg06 */
  76 #define DATA_LANE_3_SKEW_PHASE_MASK             GENMASK(6, 4)
  77 #define DATA_LANE_3_SKEW_PHASE(x)               UPDATE(x, 6, 4)
  78 #define DATA_LANE_2_SKEW_PHASE_MASK             GENMASK(2, 0)
  79 #define DATA_LANE_2_SKEW_PHASE(x)               UPDATE(x, 2, 0)
  80 /* Analog Register Part: reg07 */
  81 #define DATA_LANE_1_SKEW_PHASE_MASK             GENMASK(6, 4)
  82 #define DATA_LANE_1_SKEW_PHASE(x)               UPDATE(x, 6, 4)
  83 #define DATA_LANE_0_SKEW_PHASE_MASK             GENMASK(2, 0)
  84 #define DATA_LANE_0_SKEW_PHASE(x)               UPDATE(x, 2, 0)
  85 /* Analog Register Part: reg08 */
  86 #define SAMPLE_CLOCK_DIRECTION_MASK             BIT(4)
  87 #define SAMPLE_CLOCK_DIRECTION_REVERSE          BIT(4)
  88 #define SAMPLE_CLOCK_DIRECTION_FORWARD          0
  89 /* Digital Register Part: reg00 */
  90 #define REG_DIG_RSTN_MASK                       BIT(0)
  91 #define REG_DIG_RSTN_NORMAL                     BIT(0)
  92 #define REG_DIG_RSTN_RESET                      0
  93 /* Digital Register Part: reg01 */
  94 #define INVERT_TXCLKESC_MASK                    BIT(1)
  95 #define INVERT_TXCLKESC_ENABLE                  BIT(1)
  96 #define INVERT_TXCLKESC_DISABLE                 0
  97 #define INVERT_TXBYTECLKHS_MASK                 BIT(0)
  98 #define INVERT_TXBYTECLKHS_ENABLE               BIT(0)
  99 #define INVERT_TXBYTECLKHS_DISABLE              0
 100 /* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg05 */
 101 #define T_LPX_CNT_MASK                          GENMASK(5, 0)
 102 #define T_LPX_CNT(x)                            UPDATE(x, 5, 0)
 103 /* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg06 */
 104 #define T_HS_PREPARE_CNT_MASK                   GENMASK(6, 0)
 105 #define T_HS_PREPARE_CNT(x)                     UPDATE(x, 6, 0)
 106 /* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg07 */
 107 #define T_HS_ZERO_CNT_MASK                      GENMASK(5, 0)
 108 #define T_HS_ZERO_CNT(x)                        UPDATE(x, 5, 0)
 109 /* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg08 */
 110 #define T_HS_TRAIL_CNT_MASK                     GENMASK(6, 0)
 111 #define T_HS_TRAIL_CNT(x)                       UPDATE(x, 6, 0)
 112 /* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg09 */
 113 #define T_HS_EXIT_CNT_MASK                      GENMASK(4, 0)
 114 #define T_HS_EXIT_CNT(x)                        UPDATE(x, 4, 0)
 115 /* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg0a */
 116 #define T_CLK_POST_CNT_MASK                     GENMASK(3, 0)
 117 #define T_CLK_POST_CNT(x)                       UPDATE(x, 3, 0)
 118 /* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg0c */
 119 #define LPDT_TX_PPI_SYNC_MASK                   BIT(2)
 120 #define LPDT_TX_PPI_SYNC_ENABLE                 BIT(2)
 121 #define LPDT_TX_PPI_SYNC_DISABLE                0
 122 #define T_WAKEUP_CNT_HI_MASK                    GENMASK(1, 0)
 123 #define T_WAKEUP_CNT_HI(x)                      UPDATE(x, 1, 0)
 124 /* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg0d */
 125 #define T_WAKEUP_CNT_LO_MASK                    GENMASK(7, 0)
 126 #define T_WAKEUP_CNT_LO(x)                      UPDATE(x, 7, 0)
 127 /* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg0e */
 128 #define T_CLK_PRE_CNT_MASK                      GENMASK(3, 0)
 129 #define T_CLK_PRE_CNT(x)                        UPDATE(x, 3, 0)
 130 /* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg10 */
 131 #define T_TA_GO_CNT_MASK                        GENMASK(5, 0)
 132 #define T_TA_GO_CNT(x)                          UPDATE(x, 5, 0)
 133 /* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg11 */
 134 #define T_TA_SURE_CNT_MASK                      GENMASK(5, 0)
 135 #define T_TA_SURE_CNT(x)                        UPDATE(x, 5, 0)
 136 /* Clock/Data0/Data1/Data2/Data3 Lane Register Part: reg12 */
 137 #define T_TA_WAIT_CNT_MASK                      GENMASK(5, 0)
 138 #define T_TA_WAIT_CNT(x)                        UPDATE(x, 5, 0)
 139 /* LVDS Register Part: reg00 */
 140 #define LVDS_DIGITAL_INTERNAL_RESET_MASK        BIT(2)
 141 #define LVDS_DIGITAL_INTERNAL_RESET_DISABLE     BIT(2)
 142 #define LVDS_DIGITAL_INTERNAL_RESET_ENABLE      0
 143 /* LVDS Register Part: reg01 */
 144 #define LVDS_DIGITAL_INTERNAL_ENABLE_MASK       BIT(7)
 145 #define LVDS_DIGITAL_INTERNAL_ENABLE            BIT(7)
 146 #define LVDS_DIGITAL_INTERNAL_DISABLE           0
 147 /* LVDS Register Part: reg03 */
 148 #define MODE_ENABLE_MASK                        GENMASK(2, 0)
 149 #define TTL_MODE_ENABLE                         BIT(2)
 150 #define LVDS_MODE_ENABLE                        BIT(1)
 151 #define MIPI_MODE_ENABLE                        BIT(0)
 152 /* LVDS Register Part: reg0b */
 153 #define LVDS_LANE_EN_MASK                       GENMASK(7, 3)
 154 #define LVDS_DATA_LANE0_EN                      BIT(7)
 155 #define LVDS_DATA_LANE1_EN                      BIT(6)
 156 #define LVDS_DATA_LANE2_EN                      BIT(5)
 157 #define LVDS_DATA_LANE3_EN                      BIT(4)
 158 #define LVDS_CLK_LANE_EN                        BIT(3)
 159 #define LVDS_PLL_POWER_MASK                     BIT(2)
 160 #define LVDS_PLL_POWER_OFF                      BIT(2)
 161 #define LVDS_PLL_POWER_ON                       0
 162 #define LVDS_BANDGAP_POWER_MASK                 BIT(0)
 163 #define LVDS_BANDGAP_POWER_DOWN                 BIT(0)
 164 #define LVDS_BANDGAP_POWER_ON                   0
 165
 166 #define DSI_PHY_RSTZ            0xa0
 167 #define PHY_ENABLECLK           BIT(2)
 168 #define DSI_PHY_STATUS          0xb0
 169 #define PHY_LOCK                BIT(0)
 170
 171 struct inno_dsidphy {
 172         struct device *dev;
 173         struct clk *ref_clk;
 174         struct clk *pclk_phy;
 175         struct clk *pclk_host;
 176         void __iomem *phy_base;
 177         void __iomem *host_base;
 178         struct reset_control *rst;
 179         enum phy_mode mode;
 180         struct phy_configure_opts_mipi_dphy dphy_cfg;
 181
 182         struct clk *pll_clk;
 183         struct {
 184                 struct clk_hw hw;
 185                 u8 prediv;
 186                 u16 fbdiv;
 187                 unsigned long rate;
 188         } pll;
 189 };
 190
 191 enum {
 192         REGISTER_PART_ANALOG,
 193         REGISTER_PART_DIGITAL,
 194         REGISTER_PART_CLOCK_LANE,
 195         REGISTER_PART_DATA0_LANE,
 196         REGISTER_PART_DATA1_LANE,
 197         REGISTER_PART_DATA2_LANE,
 198         REGISTER_PART_DATA3_LANE,
 199         REGISTER_PART_LVDS,
 200 };
 201
 202 static inline struct inno_dsidphy *hw_to_inno(struct clk_hw *hw)
 203 {
 204         return container_of(hw, struct inno_dsidphy, pll.hw);
 205 }
 206
 207 static void phy_update_bits(struct inno_dsidphy *inno,
 208                             u8 first, u8 second, u8 mask, u8 val)
 209 {
 210         u32 reg = PHY_REG(first, second) << 2;
 211         unsigned int tmp, orig;
 212
 213         orig = readl(inno->phy_base + reg);
 214         tmp = orig & ~mask;
 215         tmp |= val & mask;
 216         writel(tmp, inno->phy_base + reg);
 217 }
 218
 219 static unsigned long inno_dsidphy_pll_calc_rate(struct inno_dsidphy *inno,
 220                                                 unsigned long rate)
 221 {
 222         unsigned long prate = clk_get_rate(inno->ref_clk);
 223         unsigned long best_freq = 0;
 224         unsigned long fref, fout;
 225         u8 min_prediv, max_prediv;
 226         u8 _prediv, best_prediv = 1;
 227         u16 _fbdiv, best_fbdiv = 1;
 228         u32 min_delta = UINT_MAX;
 229
 230         /*
 231          * The PLL output frequency can be calculated using a simple formula:
 232          * PLL_Output_Frequency = (FREF / PREDIV * FBDIV) / 2
 233          * PLL_Output_Frequency: it is equal to DDR-Clock-Frequency * 2
 234          */
 235         fref = prate / 2;
 236         if (rate > 1000000000UL)
 237                 fout = 1000000000UL;
 238         else
 239                 fout = rate;
 240
 241         /* 5Mhz < Fref / prediv < 40MHz */
 242         min_prediv = DIV_ROUND_UP(fref, 40000000);
 243         max_prediv = fref / 5000000;
 244
 245         for (_prediv = min_prediv; _prediv <= max_prediv; _prediv++) {
 246                 u64 tmp;
 247                 u32 delta;
 248
 249                 tmp = (u64)fout * _prediv;
 250                 do_div(tmp, fref);
 251                 _fbdiv = tmp;
 252
 253                 /*
 254                  * The possible settings of feedback divider are
 255                  * 12, 13, 14, 16, ~ 511
 256                  */
 257                 if (_fbdiv == 15)
 258                         continue;
 259
 260                 if (_fbdiv < 12 || _fbdiv > 511)
 261                         continue;
 262
 263                 tmp = (u64)_fbdiv * fref;
 264                 do_div(tmp, _prediv);
 265
 266                 delta = abs(fout - tmp);
 267                 if (!delta) {
 268                         best_prediv = _prediv;
 269                         best_fbdiv = _fbdiv;
 270                         best_freq = tmp;
 271                         break;
 272                 } else if (delta < min_delta) {
 273                         best_prediv = _prediv;
 274                         best_fbdiv = _fbdiv;
 275                         best_freq = tmp;
 276                         min_delta = delta;
 277                 }
 278         }
 279
 280         if (best_freq) {
 281                 inno->pll.prediv = best_prediv;
 282                 inno->pll.fbdiv = best_fbdiv;
 283                 inno->pll.rate = best_freq;
 284         }
 285
 286         return best_freq;
 287 }
 288
 289 static void inno_dsidphy_mipi_mode_enable(struct inno_dsidphy *inno)
 290 {
 291         struct phy_configure_opts_mipi_dphy *cfg = &inno->dphy_cfg;
 292         const struct {
 293                 unsigned long rate;
 294                 u8 hs_prepare;
 295                 u8 clk_lane_hs_zero;
 296                 u8 data_lane_hs_zero;
 297                 u8 hs_trail;
 298         } timings[] = {
 299                 { 110000000, 0x20, 0x16, 0x02, 0x22},
 300                 { 150000000, 0x06, 0x16, 0x03, 0x45},
 301                 { 200000000, 0x18, 0x17, 0x04, 0x0b},
 302                 { 250000000, 0x05, 0x17, 0x05, 0x16},
 303                 { 300000000, 0x51, 0x18, 0x06, 0x2c},
 304                 { 400000000, 0x64, 0x19, 0x07, 0x33},
 305                 { 500000000, 0x20, 0x1b, 0x07, 0x4e},
 306                 { 600000000, 0x6a, 0x1d, 0x08, 0x3a},
 307                 { 700000000, 0x3e, 0x1e, 0x08, 0x6a},
 308                 { 800000000, 0x21, 0x1f, 0x09, 0x29},
 309                 {1000000000, 0x09, 0x20, 0x09, 0x27},
 310         };
 311         u32 t_txbyteclkhs, t_txclkesc;
 312         u32 txbyteclkhs, txclkesc, esc_clk_div;
 313         u32 hs_exit, clk_post, clk_pre, wakeup, lpx, ta_go, ta_sure, ta_wait;
 314         u32 hs_prepare, hs_trail, hs_zero, clk_lane_hs_zero, data_lane_hs_zero;
 315         unsigned int i;
 316
 317         inno_dsidphy_pll_calc_rate(inno, cfg->hs_clk_rate);
 318
 319         /* Select MIPI mode */
 320         phy_update_bits(inno, REGISTER_PART_LVDS, 0x03,
 321                         MODE_ENABLE_MASK, MIPI_MODE_ENABLE);
 322         /* Configure PLL */
 323         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x03,
 324                         REG_PREDIV_MASK, REG_PREDIV(inno->pll.prediv));
 325         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x03,
 326                         REG_FBDIV_HI_MASK, REG_FBDIV_HI(inno->pll.fbdiv));
 327         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x04,
 328                         REG_FBDIV_LO_MASK, REG_FBDIV_LO(inno->pll.fbdiv));
 329         /* Enable PLL and LDO */
 330         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x01,
 331                         REG_LDOPD_MASK | REG_PLLPD_MASK,
 332                         REG_LDOPD_POWER_ON | REG_PLLPD_POWER_ON);
 333         /* Reset analog */
 334         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x01,
 335                         REG_SYNCRST_MASK, REG_SYNCRST_RESET);
 336         udelay(1);
 337         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x01,
 338                         REG_SYNCRST_MASK, REG_SYNCRST_NORMAL);
 339         /* Reset digital */
 340         phy_update_bits(inno, REGISTER_PART_DIGITAL, 0x00,
 341                         REG_DIG_RSTN_MASK, REG_DIG_RSTN_RESET);
 342         udelay(1);
 343         phy_update_bits(inno, REGISTER_PART_DIGITAL, 0x00,
 344                         REG_DIG_RSTN_MASK, REG_DIG_RSTN_NORMAL);
 345
 346         txbyteclkhs = inno->pll.rate / 8;
 347         t_txbyteclkhs = div_u64(PSEC_PER_SEC, txbyteclkhs);
 348
 349         esc_clk_div = DIV_ROUND_UP(txbyteclkhs, 20000000);
 350         txclkesc = txbyteclkhs / esc_clk_div;
 351         t_txclkesc = div_u64(PSEC_PER_SEC, txclkesc);
 352
 353         /*
 354          * The value of counter for HS Ths-exit
 355          * Ths-exit = Tpin_txbyteclkhs * value
 356          */
 357         hs_exit = DIV_ROUND_UP(cfg->hs_exit, t_txbyteclkhs);
 358         /*
 359          * The value of counter for HS Tclk-post
 360          * Tclk-post = Tpin_txbyteclkhs * value
 361          */
 362         clk_post = DIV_ROUND_UP(cfg->clk_post, t_txbyteclkhs);
 363         /*
 364          * The value of counter for HS Tclk-pre
 365          * Tclk-pre = Tpin_txbyteclkhs * value
 366          */
 367         clk_pre = DIV_ROUND_UP(cfg->clk_pre, t_txbyteclkhs);
 368
 369         /*
 370          * The value of counter for HS Tlpx Time
 371          * Tlpx = Tpin_txbyteclkhs * (2 + value)
 372          */
 373         lpx = DIV_ROUND_UP(cfg->lpx, t_txbyteclkhs);
 374         if (lpx >= 2)
 375                 lpx -= 2;
 376
 377         /*
 378          * The value of counter for HS Tta-go
 379          * Tta-go for turnaround
 380          * Tta-go = Ttxclkesc * value
 381          */
 382         ta_go = DIV_ROUND_UP(cfg->ta_go, t_txclkesc);
 383         /*
 384          * The value of counter for HS Tta-sure
 385          * Tta-sure for turnaround
 386          * Tta-sure = Ttxclkesc * value
 387          */
 388         ta_sure = DIV_ROUND_UP(cfg->ta_sure, t_txclkesc);
 389         /*
 390          * The value of counter for HS Tta-wait
 391          * Tta-wait for turnaround
 392          * Tta-wait = Ttxclkesc * value
 393          */
 394         ta_wait = DIV_ROUND_UP(cfg->ta_get, t_txclkesc);
 395
 396         for (i = 0; i < ARRAY_SIZE(timings); i++)
 397                 if (inno->pll.rate <= timings[i].rate)
 398                         break;
 399
 400         if (i == ARRAY_SIZE(timings))
 401                 --i;
 402
 403         hs_prepare = timings[i].hs_prepare;
 404         hs_trail = timings[i].hs_trail;
 405         clk_lane_hs_zero = timings[i].clk_lane_hs_zero;
 406         data_lane_hs_zero = timings[i].data_lane_hs_zero;
 407         wakeup = 0x3ff;
 408
 409         for (i = REGISTER_PART_CLOCK_LANE; i <= REGISTER_PART_DATA3_LANE; i++) {
 410                 if (i == REGISTER_PART_CLOCK_LANE)
 411                         hs_zero = clk_lane_hs_zero;
 412                 else
 413                         hs_zero = data_lane_hs_zero;
 414
 415                 phy_update_bits(inno, i, 0x05, T_LPX_CNT_MASK,
 416                                 T_LPX_CNT(lpx));
 417                 phy_update_bits(inno, i, 0x06, T_HS_PREPARE_CNT_MASK,
 418                                 T_HS_PREPARE_CNT(hs_prepare));
 419                 phy_update_bits(inno, i, 0x07, T_HS_ZERO_CNT_MASK,
 420                                 T_HS_ZERO_CNT(hs_zero));
 421                 phy_update_bits(inno, i, 0x08, T_HS_TRAIL_CNT_MASK,
 422                                 T_HS_TRAIL_CNT(hs_trail));
 423                 phy_update_bits(inno, i, 0x09, T_HS_EXIT_CNT_MASK,
 424                                 T_HS_EXIT_CNT(hs_exit));
 425                 phy_update_bits(inno, i, 0x0a, T_CLK_POST_CNT_MASK,
 426                                 T_CLK_POST_CNT(clk_post));
 427                 phy_update_bits(inno, i, 0x0e, T_CLK_PRE_CNT_MASK,
 428                                 T_CLK_PRE_CNT(clk_pre));
 429                 phy_update_bits(inno, i, 0x0c, T_WAKEUP_CNT_HI_MASK,
 430                                 T_WAKEUP_CNT_HI(wakeup >> 8));
 431                 phy_update_bits(inno, i, 0x0d, T_WAKEUP_CNT_LO_MASK,
 432                                 T_WAKEUP_CNT_LO(wakeup));
 433                 phy_update_bits(inno, i, 0x10, T_TA_GO_CNT_MASK,
 434                                 T_TA_GO_CNT(ta_go));
 435                 phy_update_bits(inno, i, 0x11, T_TA_SURE_CNT_MASK,
 436                                 T_TA_SURE_CNT(ta_sure));
 437                 phy_update_bits(inno, i, 0x12, T_TA_WAIT_CNT_MASK,
 438                                 T_TA_WAIT_CNT(ta_wait));
 439         }
 440
 441         /* Enable all lanes on analog part */
 442         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00,
 443                         LANE_EN_MASK, LANE_EN_CK | LANE_EN_3 | LANE_EN_2 |
 444                         LANE_EN_1 | LANE_EN_0);
 445 }
 446
 447 static void inno_dsidphy_lvds_mode_enable(struct inno_dsidphy *inno)
 448 {
 449         u8 prediv = 2;
 450         u16 fbdiv = 28;
 451
 452         /* Sample clock reverse direction */
 453         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x08,
 454                         SAMPLE_CLOCK_DIRECTION_MASK,
 455                         SAMPLE_CLOCK_DIRECTION_REVERSE);
 456
 457         /* Select LVDS mode */
 458         phy_update_bits(inno, REGISTER_PART_LVDS, 0x03,
 459                         MODE_ENABLE_MASK, LVDS_MODE_ENABLE);
 460         /* Configure PLL */
 461         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x03,
 462                         REG_PREDIV_MASK, REG_PREDIV(prediv));
 463         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x03,
 464                         REG_FBDIV_HI_MASK, REG_FBDIV_HI(fbdiv));
 465         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x04,
 466                         REG_FBDIV_LO_MASK, REG_FBDIV_LO(fbdiv));
 467         phy_update_bits(inno, REGISTER_PART_LVDS, 0x08, 0xff, 0xfc);
 468         /* Enable PLL and Bandgap */
 469         phy_update_bits(inno, REGISTER_PART_LVDS, 0x0b,
 470                         LVDS_PLL_POWER_MASK | LVDS_BANDGAP_POWER_MASK,
 471                         LVDS_PLL_POWER_ON | LVDS_BANDGAP_POWER_ON);
 472
 473         msleep(20);
 474
 475         /* Reset LVDS digital logic */
 476         phy_update_bits(inno, REGISTER_PART_LVDS, 0x00,
 477                         LVDS_DIGITAL_INTERNAL_RESET_MASK,
 478                         LVDS_DIGITAL_INTERNAL_RESET_ENABLE);
 479         udelay(1);
 480         phy_update_bits(inno, REGISTER_PART_LVDS, 0x00,
 481                         LVDS_DIGITAL_INTERNAL_RESET_MASK,
 482                         LVDS_DIGITAL_INTERNAL_RESET_DISABLE);
 483         /* Enable LVDS digital logic */
 484         phy_update_bits(inno, REGISTER_PART_LVDS, 0x01,
 485                         LVDS_DIGITAL_INTERNAL_ENABLE_MASK,
 486                         LVDS_DIGITAL_INTERNAL_ENABLE);
 487         /* Enable LVDS analog driver */
 488         phy_update_bits(inno, REGISTER_PART_LVDS, 0x0b,
 489                         LVDS_LANE_EN_MASK, LVDS_CLK_LANE_EN |
 490                         LVDS_DATA_LANE0_EN | LVDS_DATA_LANE1_EN |
 491                         LVDS_DATA_LANE2_EN | LVDS_DATA_LANE3_EN);
 492 }
 493
 494 static int inno_dsidphy_power_on(struct phy *phy)
 495 {
 496         struct inno_dsidphy *inno = phy_get_drvdata(phy);
 497
 498         clk_prepare_enable(inno->pclk_phy);
 499         clk_prepare_enable(inno->ref_clk);
 500         pm_runtime_get_sync(inno->dev);
 501
 502         /* Bandgap power on */
 503         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00,
 504                         BANDGAP_POWER_MASK, BANDGAP_POWER_ON);
 505         /* Enable power work */
 506         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00,
 507                         POWER_WORK_MASK, POWER_WORK_ENABLE);
 508
 509         switch (inno->mode) {
 510         case PHY_MODE_MIPI_DPHY:
 511                 inno_dsidphy_mipi_mode_enable(inno);
 512                 break;
 513         case PHY_MODE_LVDS:
 514                 inno_dsidphy_lvds_mode_enable(inno);
 515                 break;
 516         default:
 517                 return -EINVAL;
 518         }
 519
 520         return 0;
 521 }
 522
 523 static int inno_dsidphy_power_off(struct phy *phy)
 524 {
 525         struct inno_dsidphy *inno = phy_get_drvdata(phy);
 526
 527         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00, LANE_EN_MASK, 0);
 528         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x01,
 529                         REG_LDOPD_MASK | REG_PLLPD_MASK,
 530                         REG_LDOPD_POWER_DOWN | REG_PLLPD_POWER_DOWN);
 531         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00,
 532                         POWER_WORK_MASK, POWER_WORK_DISABLE);
 533         phy_update_bits(inno, REGISTER_PART_ANALOG, 0x00,
 534                         BANDGAP_POWER_MASK, BANDGAP_POWER_DOWN);
 535
 536         phy_update_bits(inno, REGISTER_PART_LVDS, 0x0b, LVDS_LANE_EN_MASK, 0);
 537         phy_update_bits(inno, REGISTER_PART_LVDS, 0x01,
 538                         LVDS_DIGITAL_INTERNAL_ENABLE_MASK,
 539                         LVDS_DIGITAL_INTERNAL_DISABLE);
 540         phy_update_bits(inno, REGISTER_PART_LVDS, 0x0b,
 541                         LVDS_PLL_POWER_MASK | LVDS_BANDGAP_POWER_MASK,
 542                         LVDS_PLL_POWER_OFF | LVDS_BANDGAP_POWER_DOWN);
 543
 544         pm_runtime_put(inno->dev);
 545         clk_disable_unprepare(inno->ref_clk);
 546         clk_disable_unprepare(inno->pclk_phy);
 547
 548         return 0;
 549 }
 550
 551 static int inno_dsidphy_set_mode(struct phy *phy, enum phy_mode mode,
 552                                    int submode)
 553 {
 554         struct inno_dsidphy *inno = phy_get_drvdata(phy);
 555
 556         switch (mode) {
 557         case PHY_MODE_MIPI_DPHY:
 558         case PHY_MODE_LVDS:
 559                 inno->mode = mode;
 560                 break;
 561         default:
 562                 return -EINVAL;
 563         }
 564
 565         return 0;
 566 }
 567
 568 static int inno_dsidphy_configure(struct phy *phy,
 569                                   union phy_configure_opts *opts)
 570 {
 571         struct inno_dsidphy *inno = phy_get_drvdata(phy);
 572         int ret;
 573
 574         if (inno->mode != PHY_MODE_MIPI_DPHY)
 575                 return -EINVAL;
 576
 577         ret = phy_mipi_dphy_config_validate(&opts->mipi_dphy);
 578         if (ret)
 579                 return ret;
 580
 581         memcpy(&inno->dphy_cfg, &opts->mipi_dphy, sizeof(inno->dphy_cfg));
 582
 583         return 0;
 584 }
 585
 586 static const struct phy_ops inno_dsidphy_ops = {
 587         .configure = inno_dsidphy_configure,
 588         .set_mode = inno_dsidphy_set_mode,
 589         .power_on = inno_dsidphy_power_on,
 590         .power_off = inno_dsidphy_power_off,
 591         .owner = THIS_MODULE,
 592 };
 593
 594 static int inno_dsidphy_probe(struct platform_device *pdev)
 595 {
 596         struct device *dev = &pdev->dev;
 597         struct inno_dsidphy *inno;
 598         struct phy_provider *phy_provider;
 599         struct phy *phy;
 600         int ret;
 601
 602         inno = devm_kzalloc(dev, sizeof(*inno), GFP_KERNEL);
 603         if (!inno)
 604                 return -ENOMEM;
 605
 606         inno->dev = dev;
 607         platform_set_drvdata(pdev, inno);
 608
 609         inno->phy_base = devm_platform_ioremap_resource(pdev, 0);
 610         if (!inno->phy_base)
 611                 return -ENOMEM;
 612
 613         inno->ref_clk = devm_clk_get(dev, "ref");
 614         if (IS_ERR(inno->ref_clk)) {
 615                 ret = PTR_ERR(inno->ref_clk);
 616                 dev_err(dev, "failed to get ref clock: %d\n", ret);
 617                 return ret;
 618         }
 619
 620         inno->pclk_phy = devm_clk_get(dev, "pclk");
 621         if (IS_ERR(inno->pclk_phy)) {
 622                 ret = PTR_ERR(inno->pclk_phy);
 623                 dev_err(dev, "failed to get phy pclk: %d\n", ret);
 624                 return ret;
 625         }
 626
 627         inno->rst = devm_reset_control_get(dev, "apb");
 628         if (IS_ERR(inno->rst)) {
 629                 ret = PTR_ERR(inno->rst);
 630                 dev_err(dev, "failed to get system reset control: %d\n", ret);
 631                 return ret;
 632         }
 633
 634         phy = devm_phy_create(dev, NULL, &inno_dsidphy_ops);
 635         if (IS_ERR(phy)) {
 636                 ret = PTR_ERR(phy);
 637                 dev_err(dev, "failed to create phy: %d\n", ret);
 638                 return ret;
 639         }
 640
 641         phy_set_drvdata(phy, inno);
 642
 643         phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
 644         if (IS_ERR(phy_provider)) {
 645                 ret = PTR_ERR(phy_provider);
 646                 dev_err(dev, "failed to register phy provider: %d\n", ret);
 647                 return ret;
 648         }
 649
 650         pm_runtime_enable(dev);
 651
 652         return 0;
 653 }
 654
 655 static int inno_dsidphy_remove(struct platform_device *pdev)
 656 {
 657         struct inno_dsidphy *inno = platform_get_drvdata(pdev);
 658
 659         pm_runtime_disable(inno->dev);
 660
 661         return 0;
 662 }
 663
 664 static const struct of_device_id inno_dsidphy_of_match[] = {
 665         { .compatible = "rockchip,px30-dsi-dphy", },
 666         { .compatible = "rockchip,rk3128-dsi-dphy", },
 667         { .compatible = "rockchip,rk3368-dsi-dphy", },
 668         {}
 669 };
 670 MODULE_DEVICE_TABLE(of, inno_dsidphy_of_match);
 671
 672 static struct platform_driver inno_dsidphy_driver = {
 673         .driver = {
 674                 .name = "inno-dsidphy",
 675                 .of_match_table = of_match_ptr(inno_dsidphy_of_match),
 676         },
 677         .probe = inno_dsidphy_probe,
 678         .remove = inno_dsidphy_remove,
 679 };
 680 module_platform_driver(inno_dsidphy_driver);
 681
 682 MODULE_AUTHOR("Wyon Bi <bivvy.bi@rock-chips.com>");
 683 MODULE_DESCRIPTION("Innosilicon MIPI/LVDS/TTL Video Combo PHY driver");
 684 MODULE_LICENSE("GPL v2");