drivers/clk/rockchip/clk_rk3328.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * (C) Copyright 2017 Rockchip Electronics Co., Ltd
   4  */
   5
   6 #include <common.h>
   7 #include <bitfield.h>
   8 #include <clk-uclass.h>
   9 #include <dm.h>
  10 #include <errno.h>
  11 #include <log.h>
  12 #include <malloc.h>
  13 #include <syscon.h>
  14 #include <asm/arch-rockchip/clock.h>
  15 #include <asm/arch-rockchip/cru_rk3328.h>
  16 #include <asm/arch-rockchip/hardware.h>
  17 #include <asm/arch-rockchip/grf_rk3328.h>
  18 #include <asm/io.h>
  19 #include <dm/lists.h>
  20 #include <dt-bindings/clock/rk3328-cru.h>
  21 #include <linux/bitops.h>
  22 #include <linux/delay.h>
  23
  24 struct pll_div {
  25         u32 refdiv;
  26         u32 fbdiv;
  27         u32 postdiv1;
  28         u32 postdiv2;
  29         u32 frac;
  30 };
  31
  32 #define RATE_TO_DIV(input_rate, output_rate) \
  33         ((input_rate) / (output_rate) - 1);
  34 #define DIV_TO_RATE(input_rate, div)    ((input_rate) / ((div) + 1))
  35
  36 #define PLL_DIVISORS(hz, _refdiv, _postdiv1, _postdiv2) {\
  37         .refdiv = _refdiv,\
  38         .fbdiv = (u32)((u64)hz * _refdiv * _postdiv1 * _postdiv2 / OSC_HZ),\
  39         .postdiv1 = _postdiv1, .postdiv2 = _postdiv2};
  40
  41 static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 1, 4, 1);
  42 static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 2, 2, 1);
  43
  44 static const struct pll_div apll_816_cfg = PLL_DIVISORS(816 * MHz, 1, 2, 1);
  45 static const struct pll_div apll_600_cfg = PLL_DIVISORS(600 * MHz, 1, 3, 1);
  46
  47 static const struct pll_div *apll_cfgs[] = {
  48         [APLL_816_MHZ] = &apll_816_cfg,
  49         [APLL_600_MHZ] = &apll_600_cfg,
  50 };
  51
  52 enum {
  53         /* PLL_CON0 */
  54         PLL_POSTDIV1_SHIFT              = 12,
  55         PLL_POSTDIV1_MASK               = 0x7 << PLL_POSTDIV1_SHIFT,
  56         PLL_FBDIV_SHIFT                 = 0,
  57         PLL_FBDIV_MASK                  = 0xfff,
  58
  59         /* PLL_CON1 */
  60         PLL_DSMPD_SHIFT                 = 12,
  61         PLL_DSMPD_MASK                  = 1 << PLL_DSMPD_SHIFT,
  62         PLL_INTEGER_MODE                = 1,
  63         PLL_LOCK_STATUS_SHIFT           = 10,
  64         PLL_LOCK_STATUS_MASK            = 1 << PLL_LOCK_STATUS_SHIFT,
  65         PLL_POSTDIV2_SHIFT              = 6,
  66         PLL_POSTDIV2_MASK               = 0x7 << PLL_POSTDIV2_SHIFT,
  67         PLL_REFDIV_SHIFT                = 0,
  68         PLL_REFDIV_MASK                 = 0x3f,
  69
  70         /* PLL_CON2 */
  71         PLL_FRACDIV_SHIFT               = 0,
  72         PLL_FRACDIV_MASK                = 0xffffff,
  73
  74         /* MODE_CON */
  75         APLL_MODE_SHIFT                 = 0,
  76         NPLL_MODE_SHIFT                 = 1,
  77         DPLL_MODE_SHIFT                 = 4,
  78         CPLL_MODE_SHIFT                 = 8,
  79         GPLL_MODE_SHIFT                 = 12,
  80         PLL_MODE_SLOW                   = 0,
  81         PLL_MODE_NORM,
  82
  83         /* CLKSEL_CON0 */
  84         CLK_CORE_PLL_SEL_APLL           = 0,
  85         CLK_CORE_PLL_SEL_GPLL,
  86         CLK_CORE_PLL_SEL_DPLL,
  87         CLK_CORE_PLL_SEL_NPLL,
  88         CLK_CORE_PLL_SEL_SHIFT          = 6,
  89         CLK_CORE_PLL_SEL_MASK           = 3 << CLK_CORE_PLL_SEL_SHIFT,
  90         CLK_CORE_DIV_SHIFT              = 0,
  91         CLK_CORE_DIV_MASK               = 0x1f,
  92
  93         /* CLKSEL_CON1 */
  94         ACLKM_CORE_DIV_SHIFT            = 4,
  95         ACLKM_CORE_DIV_MASK             = 0x7 << ACLKM_CORE_DIV_SHIFT,
  96         PCLK_DBG_DIV_SHIFT              = 0,
  97         PCLK_DBG_DIV_MASK               = 0xF << PCLK_DBG_DIV_SHIFT,
  98
  99         /* CLKSEL_CON27 */
 100         GMAC2IO_PLL_SEL_SHIFT           = 7,
 101         GMAC2IO_PLL_SEL_MASK            = 1 << GMAC2IO_PLL_SEL_SHIFT,
 102         GMAC2IO_PLL_SEL_CPLL            = 0,
 103         GMAC2IO_PLL_SEL_GPLL            = 1,
 104         GMAC2IO_CLK_DIV_MASK            = 0x1f,
 105         GMAC2IO_CLK_DIV_SHIFT           = 0,
 106
 107         /* CLKSEL_CON28 */
 108         ACLK_PERIHP_PLL_SEL_CPLL        = 0,
 109         ACLK_PERIHP_PLL_SEL_GPLL,
 110         ACLK_PERIHP_PLL_SEL_HDMIPHY,
 111         ACLK_PERIHP_PLL_SEL_SHIFT       = 6,
 112         ACLK_PERIHP_PLL_SEL_MASK        = 3 << ACLK_PERIHP_PLL_SEL_SHIFT,
 113         ACLK_PERIHP_DIV_CON_SHIFT       = 0,
 114         ACLK_PERIHP_DIV_CON_MASK        = 0x1f,
 115
 116         /* CLKSEL_CON29 */
 117         PCLK_PERIHP_DIV_CON_SHIFT       = 4,
 118         PCLK_PERIHP_DIV_CON_MASK        = 0x7 << PCLK_PERIHP_DIV_CON_SHIFT,
 119         HCLK_PERIHP_DIV_CON_SHIFT       = 0,
 120         HCLK_PERIHP_DIV_CON_MASK        = 3 << HCLK_PERIHP_DIV_CON_SHIFT,
 121
 122         /* CLKSEL_CON22 */
 123         CLK_TSADC_DIV_CON_SHIFT         = 0,
 124         CLK_TSADC_DIV_CON_MASK          = 0x3ff,
 125
 126         /* CLKSEL_CON23 */
 127         CLK_SARADC_DIV_CON_SHIFT        = 0,
 128         CLK_SARADC_DIV_CON_MASK         = GENMASK(9, 0),
 129         CLK_SARADC_DIV_CON_WIDTH        = 10,
 130
 131         /* CLKSEL_CON24 */
 132         CLK_PWM_PLL_SEL_CPLL            = 0,
 133         CLK_PWM_PLL_SEL_GPLL,
 134         CLK_PWM_PLL_SEL_SHIFT           = 15,
 135         CLK_PWM_PLL_SEL_MASK            = 1 << CLK_PWM_PLL_SEL_SHIFT,
 136         CLK_PWM_DIV_CON_SHIFT           = 8,
 137         CLK_PWM_DIV_CON_MASK            = 0x7f << CLK_PWM_DIV_CON_SHIFT,
 138
 139         CLK_SPI_PLL_SEL_CPLL            = 0,
 140         CLK_SPI_PLL_SEL_GPLL,
 141         CLK_SPI_PLL_SEL_SHIFT           = 7,
 142         CLK_SPI_PLL_SEL_MASK            = 1 << CLK_SPI_PLL_SEL_SHIFT,
 143         CLK_SPI_DIV_CON_SHIFT           = 0,
 144         CLK_SPI_DIV_CON_MASK            = 0x7f << CLK_SPI_DIV_CON_SHIFT,
 145
 146         /* CLKSEL_CON30 */
 147         CLK_SDMMC_PLL_SEL_CPLL          = 0,
 148         CLK_SDMMC_PLL_SEL_GPLL,
 149         CLK_SDMMC_PLL_SEL_24M,
 150         CLK_SDMMC_PLL_SEL_USBPHY,
 151         CLK_SDMMC_PLL_SHIFT             = 8,
 152         CLK_SDMMC_PLL_MASK              = 0x3 << CLK_SDMMC_PLL_SHIFT,
 153         CLK_SDMMC_DIV_CON_SHIFT          = 0,
 154         CLK_SDMMC_DIV_CON_MASK           = 0xff << CLK_SDMMC_DIV_CON_SHIFT,
 155
 156         /* CLKSEL_CON32 */
 157         CLK_EMMC_PLL_SEL_CPLL           = 0,
 158         CLK_EMMC_PLL_SEL_GPLL,
 159         CLK_EMMC_PLL_SEL_24M,
 160         CLK_EMMC_PLL_SEL_USBPHY,
 161         CLK_EMMC_PLL_SHIFT              = 8,
 162         CLK_EMMC_PLL_MASK               = 0x3 << CLK_EMMC_PLL_SHIFT,
 163         CLK_EMMC_DIV_CON_SHIFT          = 0,
 164         CLK_EMMC_DIV_CON_MASK           = 0xff << CLK_EMMC_DIV_CON_SHIFT,
 165
 166         /* CLKSEL_CON34 */
 167         CLK_I2C_PLL_SEL_CPLL            = 0,
 168         CLK_I2C_PLL_SEL_GPLL,
 169         CLK_I2C_DIV_CON_MASK            = 0x7f,
 170         CLK_I2C_PLL_SEL_MASK            = 1,
 171         CLK_I2C1_PLL_SEL_SHIFT          = 15,
 172         CLK_I2C1_DIV_CON_SHIFT          = 8,
 173         CLK_I2C0_PLL_SEL_SHIFT          = 7,
 174         CLK_I2C0_DIV_CON_SHIFT          = 0,
 175
 176         /* CLKSEL_CON35 */
 177         CLK_I2C3_PLL_SEL_SHIFT          = 15,
 178         CLK_I2C3_DIV_CON_SHIFT          = 8,
 179         CLK_I2C2_PLL_SEL_SHIFT          = 7,
 180         CLK_I2C2_DIV_CON_SHIFT          = 0,
 181 };
 182
 183 #define VCO_MAX_KHZ     (3200 * (MHz / KHz))
 184 #define VCO_MIN_KHZ     (800 * (MHz / KHz))
 185 #define OUTPUT_MAX_KHZ  (3200 * (MHz / KHz))
 186 #define OUTPUT_MIN_KHZ  (16 * (MHz / KHz))
 187
 188 /*
 189  *  the div restructions of pll in integer mode, these are defined in
 190  *  * CRU_*PLL_CON0 or PMUCRU_*PLL_CON0
 191  */
 192 #define PLL_DIV_MIN     16
 193 #define PLL_DIV_MAX     3200
 194
 195 /*
 196  * How to calculate the PLL(from TRM V0.3 Part 1 Page 63):
 197  * Formulas also embedded within the Fractional PLL Verilog model:
 198  * If DSMPD = 1 (DSM is disabled, "integer mode")
 199  * FOUTVCO = FREF / REFDIV * FBDIV
 200  * FOUTPOSTDIV = FOUTVCO / POSTDIV1 / POSTDIV2
 201  * Where:
 202  * FOUTVCO = Fractional PLL non-divided output frequency
 203  * FOUTPOSTDIV = Fractional PLL divided output frequency
 204  *               (output of second post divider)
 205  * FREF = Fractional PLL input reference frequency, (the OSC_HZ 24MHz input)
 206  * REFDIV = Fractional PLL input reference clock divider
 207  * FBDIV = Integer value programmed into feedback divide
 208  *
 209  */
 210 static void rkclk_set_pll(struct rk3328_cru *cru, enum rk_clk_id clk_id,
 211                         const struct pll_div *div)
 212 {
 213         u32 *pll_con;
 214         u32 mode_shift, mode_mask;
 215
 216         pll_con = NULL;
 217         mode_shift = 0;
 218         switch (clk_id) {
 219         case CLK_ARM:
 220                 pll_con = cru->apll_con;
 221                 mode_shift = APLL_MODE_SHIFT;
 222                 break;
 223         case CLK_DDR:
 224                 pll_con = cru->dpll_con;
 225                 mode_shift = DPLL_MODE_SHIFT;
 226                 break;
 227         case CLK_CODEC:
 228                 pll_con = cru->cpll_con;
 229                 mode_shift = CPLL_MODE_SHIFT;
 230                 break;
 231         case CLK_GENERAL:
 232                 pll_con = cru->gpll_con;
 233                 mode_shift = GPLL_MODE_SHIFT;
 234                 break;
 235         case CLK_NEW:
 236                 pll_con = cru->npll_con;
 237                 mode_shift = NPLL_MODE_SHIFT;
 238                 break;
 239         default:
 240                 break;
 241         }
 242         mode_mask = 1 << mode_shift;
 243
 244         /* All 8 PLLs have same VCO and output frequency range restrictions. */
 245         u32 vco_khz = OSC_HZ / 1000 * div->fbdiv / div->refdiv;
 246         u32 output_khz = vco_khz / div->postdiv1 / div->postdiv2;
 247
 248         debug("PLL at %p: fbdiv=%d, refdiv=%d, postdiv1=%d, \
 249               postdiv2=%d, vco=%u khz, output=%u khz\n",
 250               pll_con, div->fbdiv, div->refdiv, div->postdiv1,
 251               div->postdiv2, vco_khz, output_khz);
 252         assert(vco_khz >= VCO_MIN_KHZ && vco_khz <= VCO_MAX_KHZ &&
 253                output_khz >= OUTPUT_MIN_KHZ && output_khz <= OUTPUT_MAX_KHZ &&
 254                div->fbdiv >= PLL_DIV_MIN && div->fbdiv <= PLL_DIV_MAX);
 255
 256         /*
 257          * When power on or changing PLL setting,
 258          * we must force PLL into slow mode to ensure output stable clock.
 259          */
 260         rk_clrsetreg(&cru->mode_con, mode_mask, PLL_MODE_SLOW << mode_shift);
 261
 262         /* use integer mode */
 263         rk_clrsetreg(&pll_con[1], PLL_DSMPD_MASK,
 264                      PLL_INTEGER_MODE << PLL_DSMPD_SHIFT);
 265
 266         rk_clrsetreg(&pll_con[0],
 267                      PLL_FBDIV_MASK | PLL_POSTDIV1_MASK,
 268                      (div->fbdiv << PLL_FBDIV_SHIFT) |
 269                      (div->postdiv1 << PLL_POSTDIV1_SHIFT));
 270         rk_clrsetreg(&pll_con[1],
 271                      PLL_POSTDIV2_MASK | PLL_REFDIV_MASK,
 272                      (div->postdiv2 << PLL_POSTDIV2_SHIFT) |
 273                      (div->refdiv << PLL_REFDIV_SHIFT));
 274
 275         /* waiting for pll lock */
 276         while (!(readl(&pll_con[1]) & (1 << PLL_LOCK_STATUS_SHIFT)))
 277                 udelay(1);
 278
 279         /* pll enter normal mode */
 280         rk_clrsetreg(&cru->mode_con, mode_mask, PLL_MODE_NORM << mode_shift);
 281 }
 282
 283 static void rkclk_init(struct rk3328_cru *cru)
 284 {
 285         u32 aclk_div;
 286         u32 hclk_div;
 287         u32 pclk_div;
 288
 289         rk3328_configure_cpu(cru, APLL_600_MHZ);
 290
 291         /* configure gpll cpll */
 292         rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg);
 293         rkclk_set_pll(cru, CLK_CODEC, &cpll_init_cfg);
 294
 295         /* configure perihp aclk, hclk, pclk */
 296         aclk_div = GPLL_HZ / PERIHP_ACLK_HZ - 1;
 297         hclk_div = PERIHP_ACLK_HZ / PERIHP_HCLK_HZ - 1;
 298         pclk_div = PERIHP_ACLK_HZ / PERIHP_PCLK_HZ - 1;
 299
 300         rk_clrsetreg(&cru->clksel_con[28],
 301                      ACLK_PERIHP_PLL_SEL_MASK | ACLK_PERIHP_DIV_CON_MASK,
 302                      ACLK_PERIHP_PLL_SEL_GPLL << ACLK_PERIHP_PLL_SEL_SHIFT |
 303                      aclk_div << ACLK_PERIHP_DIV_CON_SHIFT);
 304         rk_clrsetreg(&cru->clksel_con[29],
 305                      PCLK_PERIHP_DIV_CON_MASK | HCLK_PERIHP_DIV_CON_MASK,
 306                      pclk_div << PCLK_PERIHP_DIV_CON_SHIFT |
 307                      hclk_div << HCLK_PERIHP_DIV_CON_SHIFT);
 308 }
 309
 310 void rk3328_configure_cpu(struct rk3328_cru *cru,
 311                           enum apll_frequencies apll_freq)
 312 {
 313         u32 clk_core_div;
 314         u32 aclkm_div;
 315         u32 pclk_dbg_div;
 316
 317         rkclk_set_pll(cru, CLK_ARM, apll_cfgs[apll_freq]);
 318
 319         clk_core_div = APLL_HZ / CLK_CORE_HZ - 1;
 320         aclkm_div = APLL_HZ / ACLKM_CORE_HZ / (clk_core_div + 1) - 1;
 321         pclk_dbg_div = APLL_HZ / PCLK_DBG_HZ / (clk_core_div + 1) - 1;
 322
 323         rk_clrsetreg(&cru->clksel_con[0],
 324                      CLK_CORE_PLL_SEL_MASK | CLK_CORE_DIV_MASK,
 325                      CLK_CORE_PLL_SEL_APLL << CLK_CORE_PLL_SEL_SHIFT |
 326                      clk_core_div << CLK_CORE_DIV_SHIFT);
 327
 328         rk_clrsetreg(&cru->clksel_con[1],
 329                      PCLK_DBG_DIV_MASK | ACLKM_CORE_DIV_MASK,
 330                      pclk_dbg_div << PCLK_DBG_DIV_SHIFT |
 331                      aclkm_div << ACLKM_CORE_DIV_SHIFT);
 332 }
 333
 334
 335 static ulong rk3328_i2c_get_clk(struct rk3328_cru *cru, ulong clk_id)
 336 {
 337         u32 div, con;
 338
 339         switch (clk_id) {
 340         case SCLK_I2C0:
 341                 con = readl(&cru->clksel_con[34]);
 342                 div = con >> CLK_I2C0_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK;
 343                 break;
 344         case SCLK_I2C1:
 345                 con = readl(&cru->clksel_con[34]);
 346                 div = con >> CLK_I2C1_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK;
 347                 break;
 348         case SCLK_I2C2:
 349                 con = readl(&cru->clksel_con[35]);
 350                 div = con >> CLK_I2C2_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK;
 351                 break;
 352         case SCLK_I2C3:
 353                 con = readl(&cru->clksel_con[35]);
 354                 div = con >> CLK_I2C3_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK;
 355                 break;
 356         default:
 357                 printf("do not support this i2c bus\n");
 358                 return -EINVAL;
 359         }
 360
 361         return DIV_TO_RATE(GPLL_HZ, div);
 362 }
 363
 364 static ulong rk3328_i2c_set_clk(struct rk3328_cru *cru, ulong clk_id, uint hz)
 365 {
 366         int src_clk_div;
 367
 368         src_clk_div = GPLL_HZ / hz;
 369         assert(src_clk_div - 1 < 127);
 370
 371         switch (clk_id) {
 372         case SCLK_I2C0:
 373                 rk_clrsetreg(&cru->clksel_con[34],
 374                              CLK_I2C_DIV_CON_MASK << CLK_I2C0_DIV_CON_SHIFT |
 375                              CLK_I2C_PLL_SEL_MASK << CLK_I2C0_PLL_SEL_SHIFT,
 376                              (src_clk_div - 1) << CLK_I2C0_DIV_CON_SHIFT |
 377                              CLK_I2C_PLL_SEL_GPLL << CLK_I2C0_PLL_SEL_SHIFT);
 378                 break;
 379         case SCLK_I2C1:
 380                 rk_clrsetreg(&cru->clksel_con[34],
 381                              CLK_I2C_DIV_CON_MASK << CLK_I2C1_DIV_CON_SHIFT |
 382                              CLK_I2C_PLL_SEL_MASK << CLK_I2C1_PLL_SEL_SHIFT,
 383                              (src_clk_div - 1) << CLK_I2C1_DIV_CON_SHIFT |
 384                              CLK_I2C_PLL_SEL_GPLL << CLK_I2C1_PLL_SEL_SHIFT);
 385                 break;
 386         case SCLK_I2C2:
 387                 rk_clrsetreg(&cru->clksel_con[35],
 388                              CLK_I2C_DIV_CON_MASK << CLK_I2C2_DIV_CON_SHIFT |
 389                              CLK_I2C_PLL_SEL_MASK << CLK_I2C2_PLL_SEL_SHIFT,
 390                              (src_clk_div - 1) << CLK_I2C2_DIV_CON_SHIFT |
 391                              CLK_I2C_PLL_SEL_GPLL << CLK_I2C2_PLL_SEL_SHIFT);
 392                 break;
 393         case SCLK_I2C3:
 394                 rk_clrsetreg(&cru->clksel_con[35],
 395                              CLK_I2C_DIV_CON_MASK << CLK_I2C3_DIV_CON_SHIFT |
 396                              CLK_I2C_PLL_SEL_MASK << CLK_I2C3_PLL_SEL_SHIFT,
 397                              (src_clk_div - 1) << CLK_I2C3_DIV_CON_SHIFT |
 398                              CLK_I2C_PLL_SEL_GPLL << CLK_I2C3_PLL_SEL_SHIFT);
 399                 break;
 400         default:
 401                 printf("do not support this i2c bus\n");
 402                 return -EINVAL;
 403         }
 404
 405         return DIV_TO_RATE(GPLL_HZ, src_clk_div);
 406 }
 407
 408 static ulong rk3328_gmac2io_set_clk(struct rk3328_cru *cru, ulong rate)
 409 {
 410         struct rk3328_grf_regs *grf;
 411         ulong ret;
 412
 413         grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
 414
 415         /*
 416          * The RGMII CLK can be derived either from an external "clkin"
 417          * or can be generated from internally by a divider from SCLK_MAC.
 418          */
 419         if (readl(&grf->mac_con[1]) & BIT(10) &&
 420             readl(&grf->soc_con[4]) & BIT(14)) {
 421                 /* An external clock will always generate the right rate... */
 422                 ret = rate;
 423         } else {
 424                 u32 con = readl(&cru->clksel_con[27]);
 425                 ulong pll_rate;
 426                 u8 div;
 427
 428                 if ((con >> GMAC2IO_PLL_SEL_SHIFT) & GMAC2IO_PLL_SEL_GPLL)
 429                         pll_rate = GPLL_HZ;
 430                 else
 431                         pll_rate = CPLL_HZ;
 432
 433                 div = DIV_ROUND_UP(pll_rate, rate) - 1;
 434                 if (div <= 0x1f)
 435                         rk_clrsetreg(&cru->clksel_con[27], GMAC2IO_CLK_DIV_MASK,
 436                                      div << GMAC2IO_CLK_DIV_SHIFT);
 437                 else
 438                         debug("Unsupported div for gmac:%d\n", div);
 439
 440                 return DIV_TO_RATE(pll_rate, div);
 441         }
 442
 443         return ret;
 444 }
 445
 446 static ulong rk3328_mmc_get_clk(struct rk3328_cru *cru, uint clk_id)
 447 {
 448         u32 div, con, con_id;
 449
 450         switch (clk_id) {
 451         case HCLK_SDMMC:
 452         case SCLK_SDMMC:
 453                 con_id = 30;
 454                 break;
 455         case HCLK_EMMC:
 456         case SCLK_EMMC:
 457                 con_id = 32;
 458                 break;
 459         default:
 460                 return -EINVAL;
 461         }
 462         con = readl(&cru->clksel_con[con_id]);
 463         div = (con & CLK_EMMC_DIV_CON_MASK) >> CLK_EMMC_DIV_CON_SHIFT;
 464
 465         if ((con & CLK_EMMC_PLL_MASK) >> CLK_EMMC_PLL_SHIFT
 466             == CLK_EMMC_PLL_SEL_24M)
 467                 return DIV_TO_RATE(OSC_HZ, div) / 2;
 468         else
 469                 return DIV_TO_RATE(GPLL_HZ, div) / 2;
 470 }
 471
 472 static ulong rk3328_mmc_set_clk(struct rk3328_cru *cru,
 473                                 ulong clk_id, ulong set_rate)
 474 {
 475         int src_clk_div;
 476         u32 con_id;
 477
 478         switch (clk_id) {
 479         case HCLK_SDMMC:
 480         case SCLK_SDMMC:
 481                 con_id = 30;
 482                 break;
 483         case HCLK_EMMC:
 484         case SCLK_EMMC:
 485                 con_id = 32;
 486                 break;
 487         default:
 488                 return -EINVAL;
 489         }
 490         /* Select clk_sdmmc/emmc source from GPLL by default */
 491         /* mmc clock defaulg div 2 internal, need provide double in cru */
 492         src_clk_div = DIV_ROUND_UP(GPLL_HZ / 2, set_rate);
 493
 494         if (src_clk_div > 127) {
 495                 /* use 24MHz source for 400KHz clock */
 496                 src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, set_rate);
 497                 rk_clrsetreg(&cru->clksel_con[con_id],
 498                              CLK_EMMC_PLL_MASK | CLK_EMMC_DIV_CON_MASK,
 499                              CLK_EMMC_PLL_SEL_24M << CLK_EMMC_PLL_SHIFT |
 500                              (src_clk_div - 1) << CLK_EMMC_DIV_CON_SHIFT);
 501         } else {
 502                 rk_clrsetreg(&cru->clksel_con[con_id],
 503                              CLK_EMMC_PLL_MASK | CLK_EMMC_DIV_CON_MASK,
 504                              CLK_EMMC_PLL_SEL_GPLL << CLK_EMMC_PLL_SHIFT |
 505                              (src_clk_div - 1) << CLK_EMMC_DIV_CON_SHIFT);
 506         }
 507
 508         return rk3328_mmc_get_clk(cru, clk_id);
 509 }
 510
 511 static ulong rk3328_pwm_get_clk(struct rk3328_cru *cru)
 512 {
 513         u32 div, con;
 514
 515         con = readl(&cru->clksel_con[24]);
 516         div = (con & CLK_PWM_DIV_CON_MASK) >> CLK_PWM_DIV_CON_SHIFT;
 517
 518         return DIV_TO_RATE(GPLL_HZ, div);
 519 }
 520
 521 static ulong rk3328_pwm_set_clk(struct rk3328_cru *cru, uint hz)
 522 {
 523         u32 div = GPLL_HZ / hz;
 524
 525         rk_clrsetreg(&cru->clksel_con[24],
 526                      CLK_PWM_PLL_SEL_MASK | CLK_PWM_DIV_CON_MASK,
 527                      CLK_PWM_PLL_SEL_GPLL << CLK_PWM_PLL_SEL_SHIFT |
 528                      (div - 1) << CLK_PWM_DIV_CON_SHIFT);
 529
 530         return DIV_TO_RATE(GPLL_HZ, div);
 531 }
 532
 533 static ulong rk3328_saradc_get_clk(struct rk3328_cru *cru)
 534 {
 535         u32 div, val;
 536
 537         val = readl(&cru->clksel_con[23]);
 538         div = bitfield_extract(val, CLK_SARADC_DIV_CON_SHIFT,
 539                                CLK_SARADC_DIV_CON_WIDTH);
 540
 541         return DIV_TO_RATE(OSC_HZ, div);
 542 }
 543
 544 static ulong rk3328_saradc_set_clk(struct rk3328_cru *cru, uint hz)
 545 {
 546         int src_clk_div;
 547
 548         src_clk_div = DIV_ROUND_UP(OSC_HZ, hz) - 1;
 549         assert(src_clk_div < 128);
 550
 551         rk_clrsetreg(&cru->clksel_con[23],
 552                      CLK_SARADC_DIV_CON_MASK,
 553                      src_clk_div << CLK_SARADC_DIV_CON_SHIFT);
 554
 555         return rk3328_saradc_get_clk(cru);
 556 }
 557
 558 static ulong rk3328_spi_get_clk(struct rk3328_cru *cru)
 559 {
 560         u32 div, val;
 561
 562         val = readl(&cru->clksel_con[24]);
 563         div = (val & CLK_SPI_DIV_CON_MASK) >> CLK_SPI_DIV_CON_SHIFT;
 564
 565         return DIV_TO_RATE(OSC_HZ, div);
 566 }
 567
 568 static ulong rk3328_spi_set_clk(struct rk3328_cru *cru, uint hz)
 569 {
 570         u32 src_clk_div;
 571
 572         src_clk_div = GPLL_HZ / hz;
 573         assert(src_clk_div < 128);
 574
 575         rk_clrsetreg(&cru->clksel_con[24],
 576                      CLK_PWM_PLL_SEL_MASK | CLK_PWM_DIV_CON_MASK,
 577                      CLK_PWM_PLL_SEL_GPLL << CLK_PWM_PLL_SEL_SHIFT |
 578                      (src_clk_div - 1) << CLK_PWM_DIV_CON_SHIFT);
 579
 580         return rk3328_spi_get_clk(cru);
 581 }
 582
 583 static ulong rk3328_clk_get_rate(struct clk *clk)
 584 {
 585         struct rk3328_clk_priv *priv = dev_get_priv(clk->dev);
 586         ulong rate = 0;
 587
 588         switch (clk->id) {
 589         case 0 ... 29:
 590                 return 0;
 591         case HCLK_SDMMC:
 592         case HCLK_EMMC:
 593         case SCLK_SDMMC:
 594         case SCLK_EMMC:
 595                 rate = rk3328_mmc_get_clk(priv->cru, clk->id);
 596                 break;
 597         case SCLK_I2C0:
 598         case SCLK_I2C1:
 599         case SCLK_I2C2:
 600         case SCLK_I2C3:
 601                 rate = rk3328_i2c_get_clk(priv->cru, clk->id);
 602                 break;
 603         case SCLK_PWM:
 604                 rate = rk3328_pwm_get_clk(priv->cru);
 605                 break;
 606         case SCLK_SARADC:
 607                 rate = rk3328_saradc_get_clk(priv->cru);
 608                 break;
 609         case SCLK_SPI:
 610                 rate = rk3328_spi_get_clk(priv->cru);
 611                 break;
 612         default:
 613                 return -ENOENT;
 614         }
 615
 616         return rate;
 617 }
 618
 619 static ulong rk3328_clk_set_rate(struct clk *clk, ulong rate)
 620 {
 621         struct rk3328_clk_priv *priv = dev_get_priv(clk->dev);
 622         ulong ret = 0;
 623
 624         switch (clk->id) {
 625         case 0 ... 29:
 626                 return 0;
 627         case HCLK_SDMMC:
 628         case HCLK_EMMC:
 629         case SCLK_SDMMC:
 630         case SCLK_EMMC:
 631                 ret = rk3328_mmc_set_clk(priv->cru, clk->id, rate);
 632                 break;
 633         case SCLK_I2C0:
 634         case SCLK_I2C1:
 635         case SCLK_I2C2:
 636         case SCLK_I2C3:
 637                 ret = rk3328_i2c_set_clk(priv->cru, clk->id, rate);
 638                 break;
 639         case SCLK_MAC2IO:
 640                 ret = rk3328_gmac2io_set_clk(priv->cru, rate);
 641                 break;
 642         case SCLK_PWM:
 643                 ret = rk3328_pwm_set_clk(priv->cru, rate);
 644                 break;
 645         case SCLK_SARADC:
 646                 ret = rk3328_saradc_set_clk(priv->cru, rate);
 647                 break;
 648         case SCLK_SPI:
 649                 ret = rk3328_spi_set_clk(priv->cru, rate);
 650                 break;
 651         case DCLK_LCDC:
 652         case SCLK_PDM:
 653         case SCLK_RTC32K:
 654         case SCLK_UART0:
 655         case SCLK_UART1:
 656         case SCLK_UART2:
 657         case SCLK_SDIO:
 658         case SCLK_TSP:
 659         case SCLK_WIFI:
 660         case ACLK_BUS_PRE:
 661         case HCLK_BUS_PRE:
 662         case PCLK_BUS_PRE:
 663         case ACLK_PERI_PRE:
 664         case HCLK_PERI:
 665         case PCLK_PERI:
 666         case ACLK_VIO_PRE:
 667         case HCLK_VIO_PRE:
 668         case ACLK_RGA_PRE:
 669         case SCLK_RGA:
 670         case ACLK_VOP_PRE:
 671         case ACLK_RKVDEC_PRE:
 672         case ACLK_RKVENC:
 673         case ACLK_VPU_PRE:
 674         case SCLK_VDEC_CABAC:
 675         case SCLK_VDEC_CORE:
 676         case SCLK_VENC_CORE:
 677         case SCLK_VENC_DSP:
 678         case SCLK_EFUSE:
 679         case PCLK_DDR:
 680         case ACLK_GMAC:
 681         case PCLK_GMAC:
 682         case SCLK_USB3OTG_SUSPEND:
 683                 return 0;
 684         default:
 685                 return -ENOENT;
 686         }
 687
 688         return ret;
 689 }
 690
 691 static int rk3328_gmac2io_set_parent(struct clk *clk, struct clk *parent)
 692 {
 693         struct rk3328_grf_regs *grf;
 694         const char *clock_output_name;
 695         int ret;
 696
 697         grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
 698
 699         /*
 700          * If the requested parent is in the same clock-controller and the id
 701          * is SCLK_MAC2IO_SRC ("clk_mac2io_src"), switch to the internal clock.
 702          */
 703         if ((parent->dev == clk->dev) && (parent->id == SCLK_MAC2IO_SRC)) {
 704                 debug("%s: switching RGMII to SCLK_MAC2IO_SRC\n", __func__);
 705                 rk_clrreg(&grf->mac_con[1], BIT(10));
 706                 return 0;
 707         }
 708
 709         /*
 710          * Otherwise, we need to check the clock-output-names of the
 711          * requested parent to see if the requested id is "gmac_clkin".
 712          */
 713         ret = dev_read_string_index(parent->dev, "clock-output-names",
 714                                     parent->id, &clock_output_name);
 715         if (ret < 0)
 716                 return -ENODATA;
 717
 718         /* If this is "gmac_clkin", switch to the external clock input */
 719         if (!strcmp(clock_output_name, "gmac_clkin")) {
 720                 debug("%s: switching RGMII to CLKIN\n", __func__);
 721                 rk_setreg(&grf->mac_con[1], BIT(10));
 722                 return 0;
 723         }
 724
 725         return -EINVAL;
 726 }
 727
 728 static int rk3328_gmac2io_ext_set_parent(struct clk *clk, struct clk *parent)
 729 {
 730         struct rk3328_grf_regs *grf;
 731         const char *clock_output_name;
 732         int ret;
 733
 734         grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
 735
 736         /*
 737          * If the requested parent is in the same clock-controller and the id
 738          * is SCLK_MAC2IO ("clk_mac2io"), switch to the internal clock.
 739          */
 740         if ((parent->dev == clk->dev) && (parent->id == SCLK_MAC2IO)) {
 741                 debug("%s: switching RGMII to SCLK_MAC2IO\n", __func__);
 742                 rk_clrreg(&grf->soc_con[4], BIT(14));
 743                 return 0;
 744         }
 745
 746         /*
 747          * Otherwise, we need to check the clock-output-names of the
 748          * requested parent to see if the requested id is "gmac_clkin".
 749          */
 750         ret = dev_read_string_index(parent->dev, "clock-output-names",
 751                                     parent->id, &clock_output_name);
 752         if (ret < 0)
 753                 return -ENODATA;
 754
 755         /* If this is "gmac_clkin", switch to the external clock input */
 756         if (!strcmp(clock_output_name, "gmac_clkin")) {
 757                 debug("%s: switching RGMII to CLKIN\n", __func__);
 758                 rk_setreg(&grf->soc_con[4], BIT(14));
 759                 return 0;
 760         }
 761
 762         return -EINVAL;
 763 }
 764
 765 static int rk3328_clk_set_parent(struct clk *clk, struct clk *parent)
 766 {
 767         switch (clk->id) {
 768         case SCLK_MAC2IO:
 769                 return rk3328_gmac2io_set_parent(clk, parent);
 770         case SCLK_MAC2IO_EXT:
 771                 return rk3328_gmac2io_ext_set_parent(clk, parent);
 772         case DCLK_LCDC:
 773         case SCLK_PDM:
 774         case SCLK_RTC32K:
 775         case SCLK_UART0:
 776         case SCLK_UART1:
 777         case SCLK_UART2:
 778                 return 0;
 779         }
 780
 781         debug("%s: unsupported clk %ld\n", __func__, clk->id);
 782         return -ENOENT;
 783 }
 784
 785 static struct clk_ops rk3328_clk_ops = {
 786         .get_rate = rk3328_clk_get_rate,
 787         .set_rate = rk3328_clk_set_rate,
 788         .set_parent = rk3328_clk_set_parent,
 789 };
 790
 791 static int rk3328_clk_probe(struct udevice *dev)
 792 {
 793         struct rk3328_clk_priv *priv = dev_get_priv(dev);
 794
 795         rkclk_init(priv->cru);
 796
 797         return 0;
 798 }
 799
 800 static int rk3328_clk_of_to_plat(struct udevice *dev)
 801 {
 802         struct rk3328_clk_priv *priv = dev_get_priv(dev);
 803
 804         priv->cru = dev_read_addr_ptr(dev);
 805
 806         return 0;
 807 }
 808
 809 static int rk3328_clk_bind(struct udevice *dev)
 810 {
 811         int ret;
 812         struct udevice *sys_child;
 813         struct sysreset_reg *priv;
 814
 815         /* The reset driver does not have a device node, so bind it here */
 816         ret = device_bind_driver(dev, "rockchip_sysreset", "sysreset",
 817                                  &sys_child);
 818         if (ret) {
 819                 debug("Warning: No sysreset driver: ret=%d\n", ret);
 820         } else {
 821                 priv = malloc(sizeof(struct sysreset_reg));
 822                 priv->glb_srst_fst_value = offsetof(struct rk3328_cru,
 823                                                     glb_srst_fst_value);
 824                 priv->glb_srst_snd_value = offsetof(struct rk3328_cru,
 825                                                     glb_srst_snd_value);
 826                 sys_child->priv = priv;
 827         }
 828
 829 #if CONFIG_IS_ENABLED(RESET_ROCKCHIP)
 830         ret = offsetof(struct rk3328_cru, softrst_con[0]);
 831         ret = rockchip_reset_bind(dev, ret, 12);
 832         if (ret)
 833                 debug("Warning: software reset driver bind faile\n");
 834 #endif
 835
 836         return ret;
 837 }
 838
 839 static const struct udevice_id rk3328_clk_ids[] = {
 840         { .compatible = "rockchip,rk3328-cru" },
 841         { }
 842 };
 843
 844 U_BOOT_DRIVER(rockchip_rk3328_cru) = {
 845         .name           = "rockchip_rk3328_cru",
 846         .id             = UCLASS_CLK,
 847         .of_match       = rk3328_clk_ids,
 848         .priv_auto      = sizeof(struct rk3328_clk_priv),
 849         .of_to_plat = rk3328_clk_of_to_plat,
 850         .ops            = &rk3328_clk_ops,
 851         .bind           = rk3328_clk_bind,
 852         .probe          = rk3328_clk_probe,
 853 };