arch/arm/mach-exynos/clock.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2010 Samsung Electronics
   4  * Minkyu Kang <mk7.kang@samsung.com>
   5  */
   6
   7 #include <common.h>
   8 #include <asm/io.h>
   9 #include <asm/arch/clock.h>
  10 #include <asm/arch/clk.h>
  11 #include <asm/arch/periph.h>
  12
  13 #define PLL_DIV_1024    1024
  14 #define PLL_DIV_65535   65535
  15 #define PLL_DIV_65536   65536
  16 /* *
  17  * This structure is to store the src bit, div bit and prediv bit
  18  * positions of the peripheral clocks of the src and div registers
  19  */
  20 struct clk_bit_info {
  21         enum periph_id id;
  22         int32_t src_mask;
  23         int32_t div_mask;
  24         int32_t prediv_mask;
  25         int8_t src_bit;
  26         int8_t div_bit;
  27         int8_t prediv_bit;
  28 };
  29
  30 static struct clk_bit_info exynos5_bit_info[] = {
  31         /* periph id            s_mask  d_mask  p_mask  s_bit   d_bit   p_bit */
  32         {PERIPH_ID_UART0,       0xf,    0xf,    -1,     0,      0,      -1},
  33         {PERIPH_ID_UART1,       0xf,    0xf,    -1,     4,      4,      -1},
  34         {PERIPH_ID_UART2,       0xf,    0xf,    -1,     8,      8,      -1},
  35         {PERIPH_ID_UART3,       0xf,    0xf,    -1,     12,     12,     -1},
  36         {PERIPH_ID_I2C0,        -1,     0x7,    0x7,    -1,     24,     0},
  37         {PERIPH_ID_I2C1,        -1,     0x7,    0x7,    -1,     24,     0},
  38         {PERIPH_ID_I2C2,        -1,     0x7,    0x7,    -1,     24,     0},
  39         {PERIPH_ID_I2C3,        -1,     0x7,    0x7,    -1,     24,     0},
  40         {PERIPH_ID_I2C4,        -1,     0x7,    0x7,    -1,     24,     0},
  41         {PERIPH_ID_I2C5,        -1,     0x7,    0x7,    -1,     24,     0},
  42         {PERIPH_ID_I2C6,        -1,     0x7,    0x7,    -1,     24,     0},
  43         {PERIPH_ID_I2C7,        -1,     0x7,    0x7,    -1,     24,     0},
  44         {PERIPH_ID_SPI0,        0xf,    0xf,    0xff,   16,     0,      8},
  45         {PERIPH_ID_SPI1,        0xf,    0xf,    0xff,   20,     16,     24},
  46         {PERIPH_ID_SPI2,        0xf,    0xf,    0xff,   24,     0,      8},
  47         {PERIPH_ID_SDMMC0,      0xf,    0xf,    0xff,   0,      0,      8},
  48         {PERIPH_ID_SDMMC1,      0xf,    0xf,    0xff,   4,      16,     24},
  49         {PERIPH_ID_SDMMC2,      0xf,    0xf,    0xff,   8,      0,      8},
  50         {PERIPH_ID_SDMMC3,      0xf,    0xf,    0xff,   12,     16,     24},
  51         {PERIPH_ID_I2S0,        0xf,    0xf,    0xff,   0,      0,      4},
  52         {PERIPH_ID_I2S1,        0xf,    0xf,    0xff,   4,      12,     16},
  53         {PERIPH_ID_SPI3,        0xf,    0xf,    0xff,   0,      0,      4},
  54         {PERIPH_ID_SPI4,        0xf,    0xf,    0xff,   4,      12,     16},
  55         {PERIPH_ID_SDMMC4,      0xf,    0xf,    0xff,   16,     0,      8},
  56         {PERIPH_ID_PWM0,        0xf,    0xf,    -1,     24,     0,      -1},
  57         {PERIPH_ID_PWM1,        0xf,    0xf,    -1,     24,     0,      -1},
  58         {PERIPH_ID_PWM2,        0xf,    0xf,    -1,     24,     0,      -1},
  59         {PERIPH_ID_PWM3,        0xf,    0xf,    -1,     24,     0,      -1},
  60         {PERIPH_ID_PWM4,        0xf,    0xf,    -1,     24,     0,      -1},
  61
  62         {PERIPH_ID_NONE,        -1,     -1,     -1,     -1,     -1,     -1},
  63 };
  64
  65 static struct clk_bit_info exynos542x_bit_info[] = {
  66         /* periph id            s_mask  d_mask  p_mask  s_bit   d_bit   p_bit */
  67         {PERIPH_ID_UART0,       0xf,    0xf,    -1,     4,      8,      -1},
  68         {PERIPH_ID_UART1,       0xf,    0xf,    -1,     8,      12,     -1},
  69         {PERIPH_ID_UART2,       0xf,    0xf,    -1,     12,     16,     -1},
  70         {PERIPH_ID_UART3,       0xf,    0xf,    -1,     16,     20,     -1},
  71         {PERIPH_ID_I2C0,        -1,     0x3f,   -1,     -1,     8,      -1},
  72         {PERIPH_ID_I2C1,        -1,     0x3f,   -1,     -1,     8,      -1},
  73         {PERIPH_ID_I2C2,        -1,     0x3f,   -1,     -1,     8,      -1},
  74         {PERIPH_ID_I2C3,        -1,     0x3f,   -1,     -1,     8,      -1},
  75         {PERIPH_ID_I2C4,        -1,     0x3f,   -1,     -1,     8,      -1},
  76         {PERIPH_ID_I2C5,        -1,     0x3f,   -1,     -1,     8,      -1},
  77         {PERIPH_ID_I2C6,        -1,     0x3f,   -1,     -1,     8,      -1},
  78         {PERIPH_ID_I2C7,        -1,     0x3f,   -1,     -1,     8,      -1},
  79         {PERIPH_ID_SPI0,        0xf,    0xf,    0xff,   20,     20,     8},
  80         {PERIPH_ID_SPI1,        0xf,    0xf,    0xff,   24,     24,     16},
  81         {PERIPH_ID_SPI2,        0xf,    0xf,    0xff,   28,     28,     24},
  82         {PERIPH_ID_SDMMC0,      0x7,    0x3ff,  -1,     8,      0,      -1},
  83         {PERIPH_ID_SDMMC1,      0x7,    0x3ff,  -1,     12,     10,     -1},
  84         {PERIPH_ID_SDMMC2,      0x7,    0x3ff,  -1,     16,     20,     -1},
  85         {PERIPH_ID_I2C8,        -1,     0x3f,   -1,     -1,     8,      -1},
  86         {PERIPH_ID_I2C9,        -1,     0x3f,   -1,     -1,     8,      -1},
  87         {PERIPH_ID_I2S0,        0xf,    0xf,    0xff,   0,      0,      4},
  88         {PERIPH_ID_I2S1,        0xf,    0xf,    0xff,   4,      12,     16},
  89         {PERIPH_ID_SPI3,        0xf,    0xf,    0xff,   12,     16,     0},
  90         {PERIPH_ID_SPI4,        0xf,    0xf,    0xff,   16,     20,     8},
  91         {PERIPH_ID_PWM0,        0xf,    0xf,    -1,     24,     28,     -1},
  92         {PERIPH_ID_PWM1,        0xf,    0xf,    -1,     24,     28,     -1},
  93         {PERIPH_ID_PWM2,        0xf,    0xf,    -1,     24,     28,     -1},
  94         {PERIPH_ID_PWM3,        0xf,    0xf,    -1,     24,     28,     -1},
  95         {PERIPH_ID_PWM4,        0xf,    0xf,    -1,     24,     28,     -1},
  96         {PERIPH_ID_I2C10,       -1,     0x3f,   -1,     -1,     8,      -1},
  97
  98         {PERIPH_ID_NONE,        -1,     -1,     -1,     -1,     -1,     -1},
  99 };
 100
 101 /* Epll Clock division values to achive different frequency output */
 102 static struct set_epll_con_val exynos5_epll_div[] = {
 103         { 192000000, 0, 48, 3, 1, 0 },
 104         { 180000000, 0, 45, 3, 1, 0 },
 105         {  73728000, 1, 73, 3, 3, 47710 },
 106         {  67737600, 1, 90, 4, 3, 20762 },
 107         {  49152000, 0, 49, 3, 3, 9961 },
 108         {  45158400, 0, 45, 3, 3, 10381 },
 109         { 180633600, 0, 45, 3, 1, 10381 }
 110 };
 111
 112 /* exynos: return pll clock frequency */
 113 static int exynos_get_pll_clk(int pllreg, unsigned int r, unsigned int k)
 114 {
 115         unsigned long m, p, s = 0, mask, fout;
 116         unsigned int div;
 117         unsigned int freq;
 118         /*
 119          * APLL_CON: MIDV [25:16]
 120          * MPLL_CON: MIDV [25:16]
 121          * EPLL_CON: MIDV [24:16]
 122          * VPLL_CON: MIDV [24:16]
 123          * BPLL_CON: MIDV [25:16]: Exynos5
 124          */
 125         if (pllreg == APLL || pllreg == MPLL || pllreg == BPLL ||
 126             pllreg == SPLL)
 127                 mask = 0x3ff;
 128         else
 129                 mask = 0x1ff;
 130
 131         m = (r >> 16) & mask;
 132
 133         /* PDIV [13:8] */
 134         p = (r >> 8) & 0x3f;
 135         /* SDIV [2:0] */
 136         s = r & 0x7;
 137
 138         freq = CONFIG_SYS_CLK_FREQ;
 139
 140         if (pllreg == EPLL || pllreg == RPLL) {
 141                 k = k & 0xffff;
 142                 /* FOUT = (MDIV + K / 65536) * FIN / (PDIV * 2^SDIV) */
 143                 fout = (m + k / PLL_DIV_65536) * (freq / (p * (1 << s)));
 144         } else if (pllreg == VPLL) {
 145                 k = k & 0xfff;
 146
 147                 /*
 148                  * Exynos4210
 149                  * FOUT = (MDIV + K / 1024) * FIN / (PDIV * 2^SDIV)
 150                  *
 151                  * Exynos4412
 152                  * FOUT = (MDIV + K / 65535) * FIN / (PDIV * 2^SDIV)
 153                  *
 154                  * Exynos5250
 155                  * FOUT = (MDIV + K / 65536) * FIN / (PDIV * 2^SDIV)
 156                  */
 157                 if (proid_is_exynos4210())
 158                         div = PLL_DIV_1024;
 159                 else if (proid_is_exynos4412())
 160                         div = PLL_DIV_65535;
 161                 else if (proid_is_exynos5250() || proid_is_exynos5420() ||
 162                          proid_is_exynos5422())
 163                         div = PLL_DIV_65536;
 164                 else
 165                         return 0;
 166
 167                 fout = (m + k / div) * (freq / (p * (1 << s)));
 168         } else {
 169                 /*
 170                  * Exynos4412 / Exynos5250
 171                  * FOUT = MDIV * FIN / (PDIV * 2^SDIV)
 172                  *
 173                  * Exynos4210
 174                  * FOUT = MDIV * FIN / (PDIV * 2^(SDIV-1))
 175                  */
 176                 if (proid_is_exynos4210())
 177                         fout = m * (freq / (p * (1 << (s - 1))));
 178                 else
 179                         fout = m * (freq / (p * (1 << s)));
 180         }
 181         return fout;
 182 }
 183
 184 /* exynos4: return pll clock frequency */
 185 static unsigned long exynos4_get_pll_clk(int pllreg)
 186 {
 187         struct exynos4_clock *clk =
 188                 (struct exynos4_clock *)samsung_get_base_clock();
 189         unsigned long r, k = 0;
 190
 191         switch (pllreg) {
 192         case APLL:
 193                 r = readl(&clk->apll_con0);
 194                 break;
 195         case MPLL:
 196                 r = readl(&clk->mpll_con0);
 197                 break;
 198         case EPLL:
 199                 r = readl(&clk->epll_con0);
 200                 k = readl(&clk->epll_con1);
 201                 break;
 202         case VPLL:
 203                 r = readl(&clk->vpll_con0);
 204                 k = readl(&clk->vpll_con1);
 205                 break;
 206         default:
 207                 printf("Unsupported PLL (%d)\n", pllreg);
 208                 return 0;
 209         }
 210
 211         return exynos_get_pll_clk(pllreg, r, k);
 212 }
 213
 214 /* exynos4x12: return pll clock frequency */
 215 static unsigned long exynos4x12_get_pll_clk(int pllreg)
 216 {
 217         struct exynos4x12_clock *clk =
 218                 (struct exynos4x12_clock *)samsung_get_base_clock();
 219         unsigned long r, k = 0;
 220
 221         switch (pllreg) {
 222         case APLL:
 223                 r = readl(&clk->apll_con0);
 224                 break;
 225         case MPLL:
 226                 r = readl(&clk->mpll_con0);
 227                 break;
 228         case EPLL:
 229                 r = readl(&clk->epll_con0);
 230                 k = readl(&clk->epll_con1);
 231                 break;
 232         case VPLL:
 233                 r = readl(&clk->vpll_con0);
 234                 k = readl(&clk->vpll_con1);
 235                 break;
 236         default:
 237                 printf("Unsupported PLL (%d)\n", pllreg);
 238                 return 0;
 239         }
 240
 241         return exynos_get_pll_clk(pllreg, r, k);
 242 }
 243
 244 /* exynos5: return pll clock frequency */
 245 static unsigned long exynos5_get_pll_clk(int pllreg)
 246 {
 247         struct exynos5_clock *clk =
 248                 (struct exynos5_clock *)samsung_get_base_clock();
 249         unsigned long r, k = 0, fout;
 250         unsigned int pll_div2_sel, fout_sel;
 251
 252         switch (pllreg) {
 253         case APLL:
 254                 r = readl(&clk->apll_con0);
 255                 break;
 256         case MPLL:
 257                 r = readl(&clk->mpll_con0);
 258                 break;
 259         case EPLL:
 260                 r = readl(&clk->epll_con0);
 261                 k = readl(&clk->epll_con1);
 262                 break;
 263         case VPLL:
 264                 r = readl(&clk->vpll_con0);
 265                 k = readl(&clk->vpll_con1);
 266                 break;
 267         case BPLL:
 268                 r = readl(&clk->bpll_con0);
 269                 break;
 270         default:
 271                 printf("Unsupported PLL (%d)\n", pllreg);
 272                 return 0;
 273         }
 274
 275         fout = exynos_get_pll_clk(pllreg, r, k);
 276
 277         /* According to the user manual, in EVT1 MPLL and BPLL always gives
 278          * 1.6GHz clock, so divide by 2 to get 800MHz MPLL clock.*/
 279         if (pllreg == MPLL || pllreg == BPLL) {
 280                 pll_div2_sel = readl(&clk->pll_div2_sel);
 281
 282                 switch (pllreg) {
 283                 case MPLL:
 284                         fout_sel = (pll_div2_sel >> MPLL_FOUT_SEL_SHIFT)
 285                                         & MPLL_FOUT_SEL_MASK;
 286                         break;
 287                 case BPLL:
 288                         fout_sel = (pll_div2_sel >> BPLL_FOUT_SEL_SHIFT)
 289                                         & BPLL_FOUT_SEL_MASK;
 290                         break;
 291                 default:
 292                         fout_sel = -1;
 293                         break;
 294                 }
 295
 296                 if (fout_sel == 0)
 297                         fout /= 2;
 298         }
 299
 300         return fout;
 301 }
 302
 303 /* exynos542x: return pll clock frequency */
 304 static unsigned long exynos542x_get_pll_clk(int pllreg)
 305 {
 306         struct exynos5420_clock *clk =
 307                 (struct exynos5420_clock *)samsung_get_base_clock();
 308         unsigned long r, k = 0;
 309
 310         switch (pllreg) {
 311         case APLL:
 312                 r = readl(&clk->apll_con0);
 313                 break;
 314         case MPLL:
 315                 r = readl(&clk->mpll_con0);
 316                 break;
 317         case EPLL:
 318                 r = readl(&clk->epll_con0);
 319                 k = readl(&clk->epll_con1);
 320                 break;
 321         case VPLL:
 322                 r = readl(&clk->vpll_con0);
 323                 k = readl(&clk->vpll_con1);
 324                 break;
 325         case BPLL:
 326                 r = readl(&clk->bpll_con0);
 327                 break;
 328         case RPLL:
 329                 r = readl(&clk->rpll_con0);
 330                 k = readl(&clk->rpll_con1);
 331                 break;
 332         case SPLL:
 333                 r = readl(&clk->spll_con0);
 334                 break;
 335         default:
 336                 printf("Unsupported PLL (%d)\n", pllreg);
 337                 return 0;
 338         }
 339
 340         return exynos_get_pll_clk(pllreg, r, k);
 341 }
 342
 343 static struct clk_bit_info *get_clk_bit_info(int peripheral)
 344 {
 345         int i;
 346         struct clk_bit_info *info;
 347
 348         if (proid_is_exynos5420() || proid_is_exynos5422())
 349                 info = exynos542x_bit_info;
 350         else
 351                 info = exynos5_bit_info;
 352
 353         for (i = 0; info[i].id != PERIPH_ID_NONE; i++) {
 354                 if (info[i].id == peripheral)
 355                         break;
 356         }
 357
 358         if (info[i].id == PERIPH_ID_NONE)
 359                 debug("ERROR: Peripheral ID %d not found\n", peripheral);
 360
 361         return &info[i];
 362 }
 363
 364 static unsigned long exynos5_get_periph_rate(int peripheral)
 365 {
 366         struct clk_bit_info *bit_info = get_clk_bit_info(peripheral);
 367         unsigned long sclk = 0;
 368         unsigned int src = 0, div = 0, sub_div = 0;
 369         struct exynos5_clock *clk =
 370                         (struct exynos5_clock *)samsung_get_base_clock();
 371
 372         switch (peripheral) {
 373         case PERIPH_ID_UART0:
 374         case PERIPH_ID_UART1:
 375         case PERIPH_ID_UART2:
 376         case PERIPH_ID_UART3:
 377                 src = readl(&clk->src_peric0);
 378                 div = readl(&clk->div_peric0);
 379                 break;
 380         case PERIPH_ID_PWM0:
 381         case PERIPH_ID_PWM1:
 382         case PERIPH_ID_PWM2:
 383         case PERIPH_ID_PWM3:
 384         case PERIPH_ID_PWM4:
 385                 src = readl(&clk->src_peric0);
 386                 div = readl(&clk->div_peric3);
 387                 break;
 388         case PERIPH_ID_I2S0:
 389                 src = readl(&clk->src_mau);
 390                 div = sub_div = readl(&clk->div_mau);
 391         case PERIPH_ID_SPI0:
 392         case PERIPH_ID_SPI1:
 393                 src = readl(&clk->src_peric1);
 394                 div = sub_div = readl(&clk->div_peric1);
 395                 break;
 396         case PERIPH_ID_SPI2:
 397                 src = readl(&clk->src_peric1);
 398                 div = sub_div = readl(&clk->div_peric2);
 399                 break;
 400         case PERIPH_ID_SPI3:
 401         case PERIPH_ID_SPI4:
 402                 src = readl(&clk->sclk_src_isp);
 403                 div = sub_div = readl(&clk->sclk_div_isp);
 404                 break;
 405         case PERIPH_ID_SDMMC0:
 406         case PERIPH_ID_SDMMC1:
 407                 src = readl(&clk->src_fsys);
 408                 div = sub_div = readl(&clk->div_fsys1);
 409                 break;
 410         case PERIPH_ID_SDMMC2:
 411         case PERIPH_ID_SDMMC3:
 412                 src = readl(&clk->src_fsys);
 413                 div = sub_div = readl(&clk->div_fsys2);
 414                 break;
 415         case PERIPH_ID_I2C0:
 416         case PERIPH_ID_I2C1:
 417         case PERIPH_ID_I2C2:
 418         case PERIPH_ID_I2C3:
 419         case PERIPH_ID_I2C4:
 420         case PERIPH_ID_I2C5:
 421         case PERIPH_ID_I2C6:
 422         case PERIPH_ID_I2C7:
 423                 src = EXYNOS_SRC_MPLL;
 424                 div = readl(&clk->div_top1);
 425                 sub_div = readl(&clk->div_top0);
 426                 break;
 427         default:
 428                 debug("%s: invalid peripheral %d", __func__, peripheral);
 429                 return -1;
 430         };
 431
 432         if (bit_info->src_bit >= 0)
 433                 src = (src >> bit_info->src_bit) & bit_info->src_mask;
 434
 435         switch (src) {
 436         case EXYNOS_SRC_MPLL:
 437                 sclk = exynos5_get_pll_clk(MPLL);
 438                 break;
 439         case EXYNOS_SRC_EPLL:
 440                 sclk = exynos5_get_pll_clk(EPLL);
 441                 break;
 442         case EXYNOS_SRC_VPLL:
 443                 sclk = exynos5_get_pll_clk(VPLL);
 444                 break;
 445         default:
 446                 debug("%s: EXYNOS_SRC %d not supported\n", __func__, src);
 447                 return 0;
 448         }
 449
 450         /* Clock divider ratio for this peripheral */
 451         if (bit_info->div_bit >= 0)
 452                 div = (div >> bit_info->div_bit) & bit_info->div_mask;
 453
 454         /* Clock pre-divider ratio for this peripheral */
 455         if (bit_info->prediv_bit >= 0)
 456                 sub_div = (sub_div >> bit_info->prediv_bit)
 457                           & bit_info->prediv_mask;
 458
 459         /* Calculate and return required clock rate */
 460         return (sclk / (div + 1)) / (sub_div + 1);
 461 }
 462
 463 static unsigned long exynos542x_get_periph_rate(int peripheral)
 464 {
 465         struct clk_bit_info *bit_info = get_clk_bit_info(peripheral);
 466         unsigned long sclk = 0;
 467         unsigned int src = 0, div = 0, sub_div = 0;
 468         struct exynos5420_clock *clk =
 469                         (struct exynos5420_clock *)samsung_get_base_clock();
 470
 471         switch (peripheral) {
 472         case PERIPH_ID_UART0:
 473         case PERIPH_ID_UART1:
 474         case PERIPH_ID_UART2:
 475         case PERIPH_ID_UART3:
 476         case PERIPH_ID_PWM0:
 477         case PERIPH_ID_PWM1:
 478         case PERIPH_ID_PWM2:
 479         case PERIPH_ID_PWM3:
 480         case PERIPH_ID_PWM4:
 481                 src = readl(&clk->src_peric0);
 482                 div = readl(&clk->div_peric0);
 483                 break;
 484         case PERIPH_ID_SPI0:
 485         case PERIPH_ID_SPI1:
 486         case PERIPH_ID_SPI2:
 487                 src = readl(&clk->src_peric1);
 488                 div = readl(&clk->div_peric1);
 489                 sub_div = readl(&clk->div_peric4);
 490                 break;
 491         case PERIPH_ID_SPI3:
 492         case PERIPH_ID_SPI4:
 493                 src = readl(&clk->src_isp);
 494                 div = readl(&clk->div_isp1);
 495                 sub_div = readl(&clk->div_isp1);
 496                 break;
 497         case PERIPH_ID_SDMMC0:
 498         case PERIPH_ID_SDMMC1:
 499         case PERIPH_ID_SDMMC2:
 500         case PERIPH_ID_SDMMC3:
 501                 src = readl(&clk->src_fsys);
 502                 div = readl(&clk->div_fsys1);
 503                 break;
 504         case PERIPH_ID_I2C0:
 505         case PERIPH_ID_I2C1:
 506         case PERIPH_ID_I2C2:
 507         case PERIPH_ID_I2C3:
 508         case PERIPH_ID_I2C4:
 509         case PERIPH_ID_I2C5:
 510         case PERIPH_ID_I2C6:
 511         case PERIPH_ID_I2C7:
 512         case PERIPH_ID_I2C8:
 513         case PERIPH_ID_I2C9:
 514         case PERIPH_ID_I2C10:
 515                 src = EXYNOS542X_SRC_MPLL;
 516                 div = readl(&clk->div_top1);
 517                 break;
 518         default:
 519                 debug("%s: invalid peripheral %d", __func__, peripheral);
 520                 return -1;
 521         };
 522
 523         if (bit_info->src_bit >= 0)
 524                 src = (src >> bit_info->src_bit) & bit_info->src_mask;
 525
 526         switch (src) {
 527         case EXYNOS542X_SRC_MPLL:
 528                 sclk = exynos542x_get_pll_clk(MPLL);
 529                 break;
 530         case EXYNOS542X_SRC_SPLL:
 531                 sclk = exynos542x_get_pll_clk(SPLL);
 532                 break;
 533         case EXYNOS542X_SRC_EPLL:
 534                 sclk = exynos542x_get_pll_clk(EPLL);
 535                 break;
 536         case EXYNOS542X_SRC_RPLL:
 537                 sclk = exynos542x_get_pll_clk(RPLL);
 538                 break;
 539         default:
 540                 debug("%s: EXYNOS542X_SRC %d not supported", __func__, src);
 541                 return 0;
 542         }
 543
 544         /* Clock divider ratio for this peripheral */
 545         if (bit_info->div_bit >= 0)
 546                 div = (div >> bit_info->div_bit) & bit_info->div_mask;
 547
 548         /* Clock pre-divider ratio for this peripheral */
 549         if (bit_info->prediv_bit >= 0)
 550                 sub_div = (sub_div >> bit_info->prediv_bit)
 551                           & bit_info->prediv_mask;
 552
 553         /* Calculate and return required clock rate */
 554         return (sclk / (div + 1)) / (sub_div + 1);
 555 }
 556
 557 unsigned long clock_get_periph_rate(int peripheral)
 558 {
 559         if (cpu_is_exynos5()) {
 560                 if (proid_is_exynos5420() || proid_is_exynos5422())
 561                         return exynos542x_get_periph_rate(peripheral);
 562                 return exynos5_get_periph_rate(peripheral);
 563         } else {
 564                 return 0;
 565         }
 566 }
 567
 568 /* exynos4: return ARM clock frequency */
 569 static unsigned long exynos4_get_arm_clk(void)
 570 {
 571         struct exynos4_clock *clk =
 572                 (struct exynos4_clock *)samsung_get_base_clock();
 573         unsigned long div;
 574         unsigned long armclk;
 575         unsigned int core_ratio;
 576         unsigned int core2_ratio;
 577
 578         div = readl(&clk->div_cpu0);
 579
 580         /* CORE_RATIO: [2:0], CORE2_RATIO: [30:28] */
 581         core_ratio = (div >> 0) & 0x7;
 582         core2_ratio = (div >> 28) & 0x7;
 583
 584         armclk = get_pll_clk(APLL) / (core_ratio + 1);
 585         armclk /= (core2_ratio + 1);
 586
 587         return armclk;
 588 }
 589
 590 /* exynos4x12: return ARM clock frequency */
 591 static unsigned long exynos4x12_get_arm_clk(void)
 592 {
 593         struct exynos4x12_clock *clk =
 594                 (struct exynos4x12_clock *)samsung_get_base_clock();
 595         unsigned long div;
 596         unsigned long armclk;
 597         unsigned int core_ratio;
 598         unsigned int core2_ratio;
 599
 600         div = readl(&clk->div_cpu0);
 601
 602         /* CORE_RATIO: [2:0], CORE2_RATIO: [30:28] */
 603         core_ratio = (div >> 0) & 0x7;
 604         core2_ratio = (div >> 28) & 0x7;
 605
 606         armclk = get_pll_clk(APLL) / (core_ratio + 1);
 607         armclk /= (core2_ratio + 1);
 608
 609         return armclk;
 610 }
 611
 612 /* exynos5: return ARM clock frequency */
 613 static unsigned long exynos5_get_arm_clk(void)
 614 {
 615         struct exynos5_clock *clk =
 616                 (struct exynos5_clock *)samsung_get_base_clock();
 617         unsigned long div;
 618         unsigned long armclk;
 619         unsigned int arm_ratio;
 620         unsigned int arm2_ratio;
 621
 622         div = readl(&clk->div_cpu0);
 623
 624         /* ARM_RATIO: [2:0], ARM2_RATIO: [30:28] */
 625         arm_ratio = (div >> 0) & 0x7;
 626         arm2_ratio = (div >> 28) & 0x7;
 627
 628         armclk = get_pll_clk(APLL) / (arm_ratio + 1);
 629         armclk /= (arm2_ratio + 1);
 630
 631         return armclk;
 632 }
 633
 634 /* exynos4: return pwm clock frequency */
 635 static unsigned long exynos4_get_pwm_clk(void)
 636 {
 637         struct exynos4_clock *clk =
 638                 (struct exynos4_clock *)samsung_get_base_clock();
 639         unsigned long pclk, sclk;
 640         unsigned int sel;
 641         unsigned int ratio;
 642
 643         if (s5p_get_cpu_rev() == 0) {
 644                 /*
 645                  * CLK_SRC_PERIL0
 646                  * PWM_SEL [27:24]
 647                  */
 648                 sel = readl(&clk->src_peril0);
 649                 sel = (sel >> 24) & 0xf;
 650
 651                 if (sel == 0x6)
 652                         sclk = get_pll_clk(MPLL);
 653                 else if (sel == 0x7)
 654                         sclk = get_pll_clk(EPLL);
 655                 else if (sel == 0x8)
 656                         sclk = get_pll_clk(VPLL);
 657                 else
 658                         return 0;
 659
 660                 /*
 661                  * CLK_DIV_PERIL3
 662                  * PWM_RATIO [3:0]
 663                  */
 664                 ratio = readl(&clk->div_peril3);
 665                 ratio = ratio & 0xf;
 666         } else if (s5p_get_cpu_rev() == 1) {
 667                 sclk = get_pll_clk(MPLL);
 668                 ratio = 8;
 669         } else
 670                 return 0;
 671
 672         pclk = sclk / (ratio + 1);
 673
 674         return pclk;
 675 }
 676
 677 /* exynos4x12: return pwm clock frequency */
 678 static unsigned long exynos4x12_get_pwm_clk(void)
 679 {
 680         unsigned long pclk, sclk;
 681         unsigned int ratio;
 682
 683         sclk = get_pll_clk(MPLL);
 684         ratio = 8;
 685
 686         pclk = sclk / (ratio + 1);
 687
 688         return pclk;
 689 }
 690
 691 /* exynos4: return uart clock frequency */
 692 static unsigned long exynos4_get_uart_clk(int dev_index)
 693 {
 694         struct exynos4_clock *clk =
 695                 (struct exynos4_clock *)samsung_get_base_clock();
 696         unsigned long uclk, sclk;
 697         unsigned int sel;
 698         unsigned int ratio;
 699
 700         /*
 701          * CLK_SRC_PERIL0
 702          * UART0_SEL [3:0]
 703          * UART1_SEL [7:4]
 704          * UART2_SEL [8:11]
 705          * UART3_SEL [12:15]
 706          * UART4_SEL [16:19]
 707          * UART5_SEL [23:20]
 708          */
 709         sel = readl(&clk->src_peril0);
 710         sel = (sel >> (dev_index << 2)) & 0xf;
 711
 712         if (sel == 0x6)
 713                 sclk = get_pll_clk(MPLL);
 714         else if (sel == 0x7)
 715                 sclk = get_pll_clk(EPLL);
 716         else if (sel == 0x8)
 717                 sclk = get_pll_clk(VPLL);
 718         else
 719                 return 0;
 720
 721         /*
 722          * CLK_DIV_PERIL0
 723          * UART0_RATIO [3:0]
 724          * UART1_RATIO [7:4]
 725          * UART2_RATIO [8:11]
 726          * UART3_RATIO [12:15]
 727          * UART4_RATIO [16:19]
 728          * UART5_RATIO [23:20]
 729          */
 730         ratio = readl(&clk->div_peril0);
 731         ratio = (ratio >> (dev_index << 2)) & 0xf;
 732
 733         uclk = sclk / (ratio + 1);
 734
 735         return uclk;
 736 }
 737
 738 /* exynos4x12: return uart clock frequency */
 739 static unsigned long exynos4x12_get_uart_clk(int dev_index)
 740 {
 741         struct exynos4x12_clock *clk =
 742                 (struct exynos4x12_clock *)samsung_get_base_clock();
 743         unsigned long uclk, sclk;
 744         unsigned int sel;
 745         unsigned int ratio;
 746
 747         /*
 748          * CLK_SRC_PERIL0
 749          * UART0_SEL [3:0]
 750          * UART1_SEL [7:4]
 751          * UART2_SEL [8:11]
 752          * UART3_SEL [12:15]
 753          * UART4_SEL [16:19]
 754          */
 755         sel = readl(&clk->src_peril0);
 756         sel = (sel >> (dev_index << 2)) & 0xf;
 757
 758         if (sel == 0x6)
 759                 sclk = get_pll_clk(MPLL);
 760         else if (sel == 0x7)
 761                 sclk = get_pll_clk(EPLL);
 762         else if (sel == 0x8)
 763                 sclk = get_pll_clk(VPLL);
 764         else
 765                 return 0;
 766
 767         /*
 768          * CLK_DIV_PERIL0
 769          * UART0_RATIO [3:0]
 770          * UART1_RATIO [7:4]
 771          * UART2_RATIO [8:11]
 772          * UART3_RATIO [12:15]
 773          * UART4_RATIO [16:19]
 774          */
 775         ratio = readl(&clk->div_peril0);
 776         ratio = (ratio >> (dev_index << 2)) & 0xf;
 777
 778         uclk = sclk / (ratio + 1);
 779
 780         return uclk;
 781 }
 782
 783 static unsigned long exynos4_get_mmc_clk(int dev_index)
 784 {
 785         struct exynos4_clock *clk =
 786                 (struct exynos4_clock *)samsung_get_base_clock();
 787         unsigned long uclk, sclk;
 788         unsigned int sel, ratio, pre_ratio;
 789         int shift = 0;
 790
 791         sel = readl(&clk->src_fsys);
 792         sel = (sel >> (dev_index << 2)) & 0xf;
 793
 794         if (sel == 0x6)
 795                 sclk = get_pll_clk(MPLL);
 796         else if (sel == 0x7)
 797                 sclk = get_pll_clk(EPLL);
 798         else if (sel == 0x8)
 799                 sclk = get_pll_clk(VPLL);
 800         else
 801                 return 0;
 802
 803         switch (dev_index) {
 804         case 0:
 805         case 1:
 806                 ratio = readl(&clk->div_fsys1);
 807                 pre_ratio = readl(&clk->div_fsys1);
 808                 break;
 809         case 2:
 810         case 3:
 811                 ratio = readl(&clk->div_fsys2);
 812                 pre_ratio = readl(&clk->div_fsys2);
 813                 break;
 814         case 4:
 815                 ratio = readl(&clk->div_fsys3);
 816                 pre_ratio = readl(&clk->div_fsys3);
 817                 break;
 818         default:
 819                 return 0;
 820         }
 821
 822         if (dev_index == 1 || dev_index == 3)
 823                 shift = 16;
 824
 825         ratio = (ratio >> shift) & 0xf;
 826         pre_ratio = (pre_ratio >> (shift + 8)) & 0xff;
 827         uclk = (sclk / (ratio + 1)) / (pre_ratio + 1);
 828
 829         return uclk;
 830 }
 831
 832 /* exynos4: set the mmc clock */
 833 static void exynos4_set_mmc_clk(int dev_index, unsigned int div)
 834 {
 835         struct exynos4_clock *clk =
 836                 (struct exynos4_clock *)samsung_get_base_clock();
 837         unsigned int addr, clear_bit, set_bit;
 838
 839         /*
 840          * CLK_DIV_FSYS1
 841          * MMC0_PRE_RATIO [15:8], MMC1_PRE_RATIO [31:24]
 842          * CLK_DIV_FSYS2
 843          * MMC2_PRE_RATIO [15:8], MMC3_PRE_RATIO [31:24]
 844          * CLK_DIV_FSYS3
 845          * MMC4_RATIO [3:0]
 846          */
 847         if (dev_index < 2) {
 848                 addr = (unsigned int)&clk->div_fsys1;
 849                 clear_bit = MASK_PRE_RATIO(dev_index);
 850                 set_bit = SET_PRE_RATIO(dev_index, div);
 851         } else if (dev_index == 4) {
 852                 addr = (unsigned int)&clk->div_fsys3;
 853                 dev_index -= 4;
 854                 /* MMC4 is controlled with the MMC4_RATIO value */
 855                 clear_bit = MASK_RATIO(dev_index);
 856                 set_bit = SET_RATIO(dev_index, div);
 857         } else {
 858                 addr = (unsigned int)&clk->div_fsys2;
 859                 dev_index -= 2;
 860                 clear_bit = MASK_PRE_RATIO(dev_index);
 861                 set_bit = SET_PRE_RATIO(dev_index, div);
 862         }
 863
 864         clrsetbits_le32(addr, clear_bit, set_bit);
 865 }
 866
 867 /* exynos5: set the mmc clock */
 868 static void exynos5_set_mmc_clk(int dev_index, unsigned int div)
 869 {
 870         struct exynos5_clock *clk =
 871                 (struct exynos5_clock *)samsung_get_base_clock();
 872         unsigned int addr;
 873
 874         /*
 875          * CLK_DIV_FSYS1
 876          * MMC0_PRE_RATIO [15:8], MMC1_PRE_RATIO [31:24]
 877          * CLK_DIV_FSYS2
 878          * MMC2_PRE_RATIO [15:8], MMC3_PRE_RATIO [31:24]
 879          */
 880         if (dev_index < 2) {
 881                 addr = (unsigned int)&clk->div_fsys1;
 882         } else {
 883                 addr = (unsigned int)&clk->div_fsys2;
 884                 dev_index -= 2;
 885         }
 886
 887         clrsetbits_le32(addr, 0xff << ((dev_index << 4) + 8),
 888                         (div & 0xff) << ((dev_index << 4) + 8));
 889 }
 890
 891 /* exynos5: set the mmc clock */
 892 static void exynos5420_set_mmc_clk(int dev_index, unsigned int div)
 893 {
 894         struct exynos5420_clock *clk =
 895                 (struct exynos5420_clock *)samsung_get_base_clock();
 896         unsigned int addr;
 897         unsigned int shift;
 898
 899         /*
 900          * CLK_DIV_FSYS1
 901          * MMC0_RATIO [9:0]
 902          * MMC1_RATIO [19:10]
 903          * MMC2_RATIO [29:20]
 904          */
 905         addr = (unsigned int)&clk->div_fsys1;
 906         shift = dev_index * 10;
 907
 908         clrsetbits_le32(addr, 0x3ff << shift, (div & 0x3ff) << shift);
 909 }
 910
 911 /* get_lcd_clk: return lcd clock frequency */
 912 static unsigned long exynos4_get_lcd_clk(void)
 913 {
 914         struct exynos4_clock *clk =
 915                 (struct exynos4_clock *)samsung_get_base_clock();
 916         unsigned long pclk, sclk;
 917         unsigned int sel;
 918         unsigned int ratio;
 919
 920         /*
 921          * CLK_SRC_LCD0
 922          * FIMD0_SEL [3:0]
 923          */
 924         sel = readl(&clk->src_lcd0);
 925         sel = sel & 0xf;
 926
 927         /*
 928          * 0x6: SCLK_MPLL
 929          * 0x7: SCLK_EPLL
 930          * 0x8: SCLK_VPLL
 931          */
 932         if (sel == 0x6)
 933                 sclk = get_pll_clk(MPLL);
 934         else if (sel == 0x7)
 935                 sclk = get_pll_clk(EPLL);
 936         else if (sel == 0x8)
 937                 sclk = get_pll_clk(VPLL);
 938         else
 939                 return 0;
 940
 941         /*
 942          * CLK_DIV_LCD0
 943          * FIMD0_RATIO [3:0]
 944          */
 945         ratio = readl(&clk->div_lcd0);
 946         ratio = ratio & 0xf;
 947
 948         pclk = sclk / (ratio + 1);
 949
 950         return pclk;
 951 }
 952
 953 /* get_lcd_clk: return lcd clock frequency */
 954 static unsigned long exynos5_get_lcd_clk(void)
 955 {
 956         struct exynos5_clock *clk =
 957                 (struct exynos5_clock *)samsung_get_base_clock();
 958         unsigned long pclk, sclk;
 959         unsigned int sel;
 960         unsigned int ratio;
 961
 962         /*
 963          * CLK_SRC_LCD0
 964          * FIMD0_SEL [3:0]
 965          */
 966         sel = readl(&clk->src_disp1_0);
 967         sel = sel & 0xf;
 968
 969         /*
 970          * 0x6: SCLK_MPLL
 971          * 0x7: SCLK_EPLL
 972          * 0x8: SCLK_VPLL
 973          */
 974         if (sel == 0x6)
 975                 sclk = get_pll_clk(MPLL);
 976         else if (sel == 0x7)
 977                 sclk = get_pll_clk(EPLL);
 978         else if (sel == 0x8)
 979                 sclk = get_pll_clk(VPLL);
 980         else
 981                 return 0;
 982
 983         /*
 984          * CLK_DIV_LCD0
 985          * FIMD0_RATIO [3:0]
 986          */
 987         ratio = readl(&clk->div_disp1_0);
 988         ratio = ratio & 0xf;
 989
 990         pclk = sclk / (ratio + 1);
 991
 992         return pclk;
 993 }
 994
 995 static unsigned long exynos5420_get_lcd_clk(void)
 996 {
 997         struct exynos5420_clock *clk =
 998                 (struct exynos5420_clock *)samsung_get_base_clock();
 999         unsigned long pclk, sclk;
1000         unsigned int sel;
1001         unsigned int ratio;
1002
1003         /*
1004          * CLK_SRC_DISP10
1005          * FIMD1_SEL [4]
1006          * 0: SCLK_RPLL
1007          * 1: SCLK_SPLL
1008          */
1009         sel = readl(&clk->src_disp10);
1010         sel &= (1 << 4);
1011
1012         if (sel)
1013                 sclk = get_pll_clk(SPLL);
1014         else
1015                 sclk = get_pll_clk(RPLL);
1016
1017         /*
1018          * CLK_DIV_DISP10
1019          * FIMD1_RATIO [3:0]
1020          */
1021         ratio = readl(&clk->div_disp10);
1022         ratio = ratio & 0xf;
1023
1024         pclk = sclk / (ratio + 1);
1025
1026         return pclk;
1027 }
1028
1029 static unsigned long exynos5800_get_lcd_clk(void)
1030 {
1031         struct exynos5420_clock *clk =
1032                 (struct exynos5420_clock *)samsung_get_base_clock();
1033         unsigned long sclk;
1034         unsigned int sel;
1035         unsigned int ratio;
1036
1037         /*
1038          * CLK_SRC_DISP10
1039          * CLKMUX_FIMD1 [6:4]
1040          */
1041         sel = (readl(&clk->src_disp10) >> 4) & 0x7;
1042
1043         if (sel) {
1044                 /*
1045                  * Mapping of CLK_SRC_DISP10 CLKMUX_FIMD1 [6:4] values into
1046                  * PLLs. The first element is a placeholder to bypass the
1047                  * default settig.
1048                  */
1049                 const int reg_map[] = {0, CPLL, DPLL, MPLL, SPLL, IPLL, EPLL,
1050                                                                         RPLL};
1051                 sclk = get_pll_clk(reg_map[sel]);
1052         } else
1053                 sclk = CONFIG_SYS_CLK_FREQ;
1054         /*
1055          * CLK_DIV_DISP10
1056          * FIMD1_RATIO [3:0]
1057          */
1058         ratio = readl(&clk->div_disp10) & 0xf;
1059
1060         return sclk / (ratio + 1);
1061 }
1062
1063 void exynos4_set_lcd_clk(void)
1064 {
1065         struct exynos4_clock *clk =
1066             (struct exynos4_clock *)samsung_get_base_clock();
1067
1068         /*
1069          * CLK_GATE_BLOCK
1070          * CLK_CAM      [0]
1071          * CLK_TV       [1]
1072          * CLK_MFC      [2]
1073          * CLK_G3D      [3]
1074          * CLK_LCD0     [4]
1075          * CLK_LCD1     [5]
1076          * CLK_GPS      [7]
1077          */
1078         setbits_le32(&clk->gate_block, 1 << 4);
1079
1080         /*
1081          * CLK_SRC_LCD0
1082          * FIMD0_SEL            [3:0]
1083          * MDNIE0_SEL           [7:4]
1084          * MDNIE_PWM0_SEL       [8:11]
1085          * MIPI0_SEL            [12:15]
1086          * set lcd0 src clock 0x6: SCLK_MPLL
1087          */
1088         clrsetbits_le32(&clk->src_lcd0, 0xf, 0x6);
1089
1090         /*
1091          * CLK_GATE_IP_LCD0
1092          * CLK_FIMD0            [0]
1093          * CLK_MIE0             [1]
1094          * CLK_MDNIE0           [2]
1095          * CLK_DSIM0            [3]
1096          * CLK_SMMUFIMD0        [4]
1097          * CLK_PPMULCD0         [5]
1098          * Gating all clocks for FIMD0
1099          */
1100         setbits_le32(&clk->gate_ip_lcd0, 1 << 0);
1101
1102         /*
1103          * CLK_DIV_LCD0
1104          * FIMD0_RATIO          [3:0]
1105          * MDNIE0_RATIO         [7:4]
1106          * MDNIE_PWM0_RATIO     [11:8]
1107          * MDNIE_PWM_PRE_RATIO  [15:12]
1108          * MIPI0_RATIO          [19:16]
1109          * MIPI0_PRE_RATIO      [23:20]
1110          * set fimd ratio
1111          */
1112         clrsetbits_le32(&clk->div_lcd0, 0xf, 0x1);
1113 }
1114
1115 void exynos5_set_lcd_clk(void)
1116 {
1117         struct exynos5_clock *clk =
1118             (struct exynos5_clock *)samsung_get_base_clock();
1119
1120         /*
1121          * CLK_GATE_BLOCK
1122          * CLK_CAM      [0]
1123          * CLK_TV       [1]
1124          * CLK_MFC      [2]
1125          * CLK_G3D      [3]
1126          * CLK_LCD0     [4]
1127          * CLK_LCD1     [5]
1128          * CLK_GPS      [7]
1129          */
1130         setbits_le32(&clk->gate_block, 1 << 4);
1131
1132         /*
1133          * CLK_SRC_LCD0
1134          * FIMD0_SEL            [3:0]
1135          * MDNIE0_SEL           [7:4]
1136          * MDNIE_PWM0_SEL       [8:11]
1137          * MIPI0_SEL            [12:15]
1138          * set lcd0 src clock 0x6: SCLK_MPLL
1139          */
1140         clrsetbits_le32(&clk->src_disp1_0, 0xf, 0x6);
1141
1142         /*
1143          * CLK_GATE_IP_LCD0
1144          * CLK_FIMD0            [0]
1145          * CLK_MIE0             [1]
1146          * CLK_MDNIE0           [2]
1147          * CLK_DSIM0            [3]
1148          * CLK_SMMUFIMD0        [4]
1149          * CLK_PPMULCD0         [5]
1150          * Gating all clocks for FIMD0
1151          */
1152         setbits_le32(&clk->gate_ip_disp1, 1 << 0);
1153
1154         /*
1155          * CLK_DIV_LCD0
1156          * FIMD0_RATIO          [3:0]
1157          * MDNIE0_RATIO         [7:4]
1158          * MDNIE_PWM0_RATIO     [11:8]
1159          * MDNIE_PWM_PRE_RATIO  [15:12]
1160          * MIPI0_RATIO          [19:16]
1161          * MIPI0_PRE_RATIO      [23:20]
1162          * set fimd ratio
1163          */
1164         clrsetbits_le32(&clk->div_disp1_0, 0xf, 0x0);
1165 }
1166
1167 void exynos5420_set_lcd_clk(void)
1168 {
1169         struct exynos5420_clock *clk =
1170                 (struct exynos5420_clock *)samsung_get_base_clock();
1171         unsigned int cfg;
1172
1173         /*
1174          * CLK_SRC_DISP10
1175          * FIMD1_SEL [4]
1176          * 0: SCLK_RPLL
1177          * 1: SCLK_SPLL
1178          */
1179         cfg = readl(&clk->src_disp10);
1180         cfg &= ~(0x1 << 4);
1181         cfg |= (0 << 4);
1182         writel(cfg, &clk->src_disp10);
1183
1184         /*
1185          * CLK_DIV_DISP10
1186          * FIMD1_RATIO          [3:0]
1187          */
1188         cfg = readl(&clk->div_disp10);
1189         cfg &= ~(0xf << 0);
1190         cfg |= (0 << 0);
1191         writel(cfg, &clk->div_disp10);
1192 }
1193
1194 void exynos5800_set_lcd_clk(void)
1195 {
1196         struct exynos5420_clock *clk =
1197                 (struct exynos5420_clock *)samsung_get_base_clock();
1198         unsigned int cfg;
1199
1200         /*
1201          * Use RPLL for pixel clock
1202          * CLK_SRC_DISP10 CLKMUX_FIMD1 [6:4]
1203          * ==================
1204          * 111: SCLK_RPLL
1205          */
1206         cfg = readl(&clk->src_disp10) | (0x7 << 4);
1207         writel(cfg, &clk->src_disp10);
1208
1209         /*
1210          * CLK_DIV_DISP10
1211          * FIMD1_RATIO          [3:0]
1212          */
1213         clrsetbits_le32(&clk->div_disp10, 0xf << 0, 0x0 << 0);
1214 }
1215
1216 void exynos4_set_mipi_clk(void)
1217 {
1218         struct exynos4_clock *clk =
1219             (struct exynos4_clock *)samsung_get_base_clock();
1220
1221         /*
1222          * CLK_SRC_LCD0
1223          * FIMD0_SEL            [3:0]
1224          * MDNIE0_SEL           [7:4]
1225          * MDNIE_PWM0_SEL       [8:11]
1226          * MIPI0_SEL            [12:15]
1227          * set mipi0 src clock 0x6: SCLK_MPLL
1228          */
1229         clrsetbits_le32(&clk->src_lcd0, 0xf << 12, 0x6 << 12);
1230
1231         /*
1232          * CLK_SRC_MASK_LCD0
1233          * FIMD0_MASK           [0]
1234          * MDNIE0_MASK          [4]
1235          * MDNIE_PWM0_MASK      [8]
1236          * MIPI0_MASK           [12]
1237          * set src mask mipi0 0x1: Unmask
1238          */
1239         setbits_le32(&clk->src_mask_lcd0, 0x1 << 12);
1240
1241         /*
1242          * CLK_GATE_IP_LCD0
1243          * CLK_FIMD0            [0]
1244          * CLK_MIE0             [1]
1245          * CLK_MDNIE0           [2]
1246          * CLK_DSIM0            [3]
1247          * CLK_SMMUFIMD0        [4]
1248          * CLK_PPMULCD0         [5]
1249          * Gating all clocks for MIPI0
1250          */
1251         setbits_le32(&clk->gate_ip_lcd0, 1 << 3);
1252
1253         /*
1254          * CLK_DIV_LCD0
1255          * FIMD0_RATIO          [3:0]
1256          * MDNIE0_RATIO         [7:4]
1257          * MDNIE_PWM0_RATIO     [11:8]
1258          * MDNIE_PWM_PRE_RATIO  [15:12]
1259          * MIPI0_RATIO          [19:16]
1260          * MIPI0_PRE_RATIO      [23:20]
1261          * set mipi ratio
1262          */
1263         clrsetbits_le32(&clk->div_lcd0, 0xf << 16, 0x1 << 16);
1264 }
1265
1266 int exynos5_set_epll_clk(unsigned long rate)
1267 {
1268         unsigned int epll_con, epll_con_k;
1269         unsigned int i;
1270         unsigned int lockcnt;
1271         unsigned int start;
1272         struct exynos5_clock *clk =
1273                 (struct exynos5_clock *)samsung_get_base_clock();
1274
1275         epll_con = readl(&clk->epll_con0);
1276         epll_con &= ~((EPLL_CON0_LOCK_DET_EN_MASK <<
1277                         EPLL_CON0_LOCK_DET_EN_SHIFT) |
1278                 EPLL_CON0_MDIV_MASK << EPLL_CON0_MDIV_SHIFT |
1279                 EPLL_CON0_PDIV_MASK << EPLL_CON0_PDIV_SHIFT |
1280                 EPLL_CON0_SDIV_MASK << EPLL_CON0_SDIV_SHIFT);
1281
1282         for (i = 0; i < ARRAY_SIZE(exynos5_epll_div); i++) {
1283                 if (exynos5_epll_div[i].freq_out == rate)
1284                         break;
1285         }
1286
1287         if (i == ARRAY_SIZE(exynos5_epll_div))
1288                 return -1;
1289
1290         epll_con_k = exynos5_epll_div[i].k_dsm << 0;
1291         epll_con |= exynos5_epll_div[i].en_lock_det <<
1292                                 EPLL_CON0_LOCK_DET_EN_SHIFT;
1293         epll_con |= exynos5_epll_div[i].m_div << EPLL_CON0_MDIV_SHIFT;
1294         epll_con |= exynos5_epll_div[i].p_div << EPLL_CON0_PDIV_SHIFT;
1295         epll_con |= exynos5_epll_div[i].s_div << EPLL_CON0_SDIV_SHIFT;
1296
1297         /*
1298          * Required period ( in cycles) to genarate a stable clock output.
1299          * The maximum clock time can be up to 3000 * PDIV cycles of PLLs
1300          * frequency input (as per spec)
1301          */
1302         lockcnt = 3000 * exynos5_epll_div[i].p_div;
1303
1304         writel(lockcnt, &clk->epll_lock);
1305         writel(epll_con, &clk->epll_con0);
1306         writel(epll_con_k, &clk->epll_con1);
1307
1308         start = get_timer(0);
1309
1310          while (!(readl(&clk->epll_con0) &
1311                         (0x1 << EXYNOS5_EPLLCON0_LOCKED_SHIFT))) {
1312                 if (get_timer(start) > TIMEOUT_EPLL_LOCK) {
1313                         debug("%s: Timeout waiting for EPLL lock\n", __func__);
1314                         return -1;
1315                 }
1316         }
1317         return 0;
1318 }
1319
1320 int exynos5_set_i2s_clk_source(unsigned int i2s_id)
1321 {
1322         struct exynos5_clock *clk =
1323                 (struct exynos5_clock *)samsung_get_base_clock();
1324         unsigned int *audio_ass = (unsigned int *)samsung_get_base_audio_ass();
1325
1326         if (i2s_id == 0) {
1327                 setbits_le32(&clk->src_top2, CLK_SRC_MOUT_EPLL);
1328                 clrsetbits_le32(&clk->src_mau, AUDIO0_SEL_MASK,
1329                                 (CLK_SRC_SCLK_EPLL));
1330                 setbits_le32(audio_ass, AUDIO_CLKMUX_ASS);
1331         } else if (i2s_id == 1) {
1332                 clrsetbits_le32(&clk->src_peric1, AUDIO1_SEL_MASK,
1333                                 (CLK_SRC_SCLK_EPLL));
1334         } else {
1335                 return -1;
1336         }
1337         return 0;
1338 }
1339
1340 int exynos5_set_i2s_clk_prescaler(unsigned int src_frq,
1341                                   unsigned int dst_frq,
1342                                   unsigned int i2s_id)
1343 {
1344         struct exynos5_clock *clk =
1345                 (struct exynos5_clock *)samsung_get_base_clock();
1346         unsigned int div;
1347
1348         if ((dst_frq == 0) || (src_frq == 0)) {
1349                 debug("%s: Invalid requency input for prescaler\n", __func__);
1350                 debug("src frq = %d des frq = %d ", src_frq, dst_frq);
1351                 return -1;
1352         }
1353
1354         div = (src_frq / dst_frq);
1355         if (i2s_id == 0) {
1356                 if (div > AUDIO_0_RATIO_MASK) {
1357                         debug("%s: Frequency ratio is out of range\n",
1358                               __func__);
1359                         debug("src frq = %d des frq = %d ", src_frq, dst_frq);
1360                         return -1;
1361                 }
1362                 clrsetbits_le32(&clk->div_mau, AUDIO_0_RATIO_MASK,
1363                                 (div & AUDIO_0_RATIO_MASK));
1364         } else if (i2s_id == 1) {
1365                 if (div > AUDIO_1_RATIO_MASK) {
1366                         debug("%s: Frequency ratio is out of range\n",
1367                               __func__);
1368                         debug("src frq = %d des frq = %d ", src_frq, dst_frq);
1369                         return -1;
1370                 }
1371                 clrsetbits_le32(&clk->div_peric4, AUDIO_1_RATIO_MASK,
1372                                 (div & AUDIO_1_RATIO_MASK));
1373         } else {
1374                 return -1;
1375         }
1376         return 0;
1377 }
1378
1379 /**
1380  * Linearly searches for the most accurate main and fine stage clock scalars
1381  * (divisors) for a specified target frequency and scalar bit sizes by checking
1382  * all multiples of main_scalar_bits values. Will always return scalars up to or
1383  * slower than target.
1384  *
1385  * @param main_scalar_bits      Number of main scalar bits, must be > 0 and < 32
1386  * @param fine_scalar_bits      Number of fine scalar bits, must be > 0 and < 32
1387  * @param input_freq            Clock frequency to be scaled in Hz
1388  * @param target_freq           Desired clock frequency in Hz
1389  * @param best_fine_scalar      Pointer to store the fine stage divisor
1390  *
1391  * @return best_main_scalar     Main scalar for desired frequency or -1 if none
1392  * found
1393  */
1394 static int clock_calc_best_scalar(unsigned int main_scaler_bits,
1395         unsigned int fine_scalar_bits, unsigned int input_rate,
1396         unsigned int target_rate, unsigned int *best_fine_scalar)
1397 {
1398         int i;
1399         int best_main_scalar = -1;
1400         unsigned int best_error = target_rate;
1401         const unsigned int cap = (1 << fine_scalar_bits) - 1;
1402         const unsigned int loops = 1 << main_scaler_bits;
1403
1404         debug("Input Rate is %u, Target is %u, Cap is %u\n", input_rate,
1405                         target_rate, cap);
1406
1407         assert(best_fine_scalar != NULL);
1408         assert(main_scaler_bits <= fine_scalar_bits);
1409
1410         *best_fine_scalar = 1;
1411
1412         if (input_rate == 0 || target_rate == 0)
1413                 return -1;
1414
1415         if (target_rate >= input_rate)
1416                 return 1;
1417
1418         for (i = 1; i <= loops; i++) {
1419                 const unsigned int effective_div =
1420                         max(min(input_rate / i / target_rate, cap), 1U);
1421                 const unsigned int effective_rate = input_rate / i /
1422                                                         effective_div;
1423                 const int error = target_rate - effective_rate;
1424
1425                 debug("%d|effdiv:%u, effrate:%u, error:%d\n", i, effective_div,
1426                                 effective_rate, error);
1427
1428                 if (error >= 0 && error <= best_error) {
1429                         best_error = error;
1430                         best_main_scalar = i;
1431                         *best_fine_scalar = effective_div;
1432                 }
1433         }
1434
1435         return best_main_scalar;
1436 }
1437
1438 static int exynos5_set_spi_clk(enum periph_id periph_id,
1439                                         unsigned int rate)
1440 {
1441         struct exynos5_clock *clk =
1442                 (struct exynos5_clock *)samsung_get_base_clock();
1443         int main;
1444         unsigned int fine;
1445         unsigned shift, pre_shift;
1446         unsigned mask = 0xff;
1447         u32 *reg;
1448
1449         main = clock_calc_best_scalar(4, 8, 400000000, rate, &fine);
1450         if (main < 0) {
1451                 debug("%s: Cannot set clock rate for periph %d",
1452                                 __func__, periph_id);
1453                 return -1;
1454         }
1455         main = main - 1;
1456         fine = fine - 1;
1457
1458         switch (periph_id) {
1459         case PERIPH_ID_SPI0:
1460                 reg = &clk->div_peric1;
1461                 shift = 0;
1462                 pre_shift = 8;
1463                 break;
1464         case PERIPH_ID_SPI1:
1465                 reg = &clk->div_peric1;
1466                 shift = 16;
1467                 pre_shift = 24;
1468                 break;
1469         case PERIPH_ID_SPI2:
1470                 reg = &clk->div_peric2;
1471                 shift = 0;
1472                 pre_shift = 8;
1473                 break;
1474         case PERIPH_ID_SPI3:
1475                 reg = &clk->sclk_div_isp;
1476                 shift = 0;
1477                 pre_shift = 4;
1478                 break;
1479         case PERIPH_ID_SPI4:
1480                 reg = &clk->sclk_div_isp;
1481                 shift = 12;
1482                 pre_shift = 16;
1483                 break;
1484         default:
1485                 debug("%s: Unsupported peripheral ID %d\n", __func__,
1486                       periph_id);
1487                 return -1;
1488         }
1489         clrsetbits_le32(reg, mask << shift, (main & mask) << shift);
1490         clrsetbits_le32(reg, mask << pre_shift, (fine & mask) << pre_shift);
1491
1492         return 0;
1493 }
1494
1495 static int exynos5420_set_spi_clk(enum periph_id periph_id,
1496                                         unsigned int rate)
1497 {
1498         struct exynos5420_clock *clk =
1499                 (struct exynos5420_clock *)samsung_get_base_clock();
1500         int main;
1501         unsigned int fine;
1502         unsigned shift, pre_shift;
1503         unsigned div_mask = 0xf, pre_div_mask = 0xff;
1504         u32 *reg;
1505         u32 *pre_reg;
1506
1507         main = clock_calc_best_scalar(4, 8, 400000000, rate, &fine);
1508         if (main < 0) {
1509                 debug("%s: Cannot set clock rate for periph %d",
1510                       __func__, periph_id);
1511                 return -1;
1512         }
1513         main = main - 1;
1514         fine = fine - 1;
1515
1516         switch (periph_id) {
1517         case PERIPH_ID_SPI0:
1518                 reg = &clk->div_peric1;
1519                 shift = 20;
1520                 pre_reg = &clk->div_peric4;
1521                 pre_shift = 8;
1522                 break;
1523         case PERIPH_ID_SPI1:
1524                 reg = &clk->div_peric1;
1525                 shift = 24;
1526                 pre_reg = &clk->div_peric4;
1527                 pre_shift = 16;
1528                 break;
1529         case PERIPH_ID_SPI2:
1530                 reg = &clk->div_peric1;
1531                 shift = 28;
1532                 pre_reg = &clk->div_peric4;
1533                 pre_shift = 24;
1534                 break;
1535         case PERIPH_ID_SPI3:
1536                 reg = &clk->div_isp1;
1537                 shift = 16;
1538                 pre_reg = &clk->div_isp1;
1539                 pre_shift = 0;
1540                 break;
1541         case PERIPH_ID_SPI4:
1542                 reg = &clk->div_isp1;
1543                 shift = 20;
1544                 pre_reg = &clk->div_isp1;
1545                 pre_shift = 8;
1546                 break;
1547         default:
1548                 debug("%s: Unsupported peripheral ID %d\n", __func__,
1549                       periph_id);
1550                 return -1;
1551         }
1552
1553         clrsetbits_le32(reg, div_mask << shift, (main & div_mask) << shift);
1554         clrsetbits_le32(pre_reg, pre_div_mask << pre_shift,
1555                         (fine & pre_div_mask) << pre_shift);
1556
1557         return 0;
1558 }
1559
1560 static unsigned long exynos4_get_i2c_clk(void)
1561 {
1562         struct exynos4_clock *clk =
1563                 (struct exynos4_clock *)samsung_get_base_clock();
1564         unsigned long sclk, aclk_100;
1565         unsigned int ratio;
1566
1567         sclk = get_pll_clk(APLL);
1568
1569         ratio = (readl(&clk->div_top)) >> 4;
1570         ratio &= 0xf;
1571         aclk_100 = sclk / (ratio + 1);
1572         return aclk_100;
1573 }
1574
1575 unsigned long get_pll_clk(int pllreg)
1576 {
1577         if (cpu_is_exynos5()) {
1578                 if (proid_is_exynos5420() || proid_is_exynos5422())
1579                         return exynos542x_get_pll_clk(pllreg);
1580                 return exynos5_get_pll_clk(pllreg);
1581         } else if (cpu_is_exynos4()) {
1582                 if (proid_is_exynos4412())
1583                         return exynos4x12_get_pll_clk(pllreg);
1584                 return exynos4_get_pll_clk(pllreg);
1585         }
1586
1587         return 0;
1588 }
1589
1590 unsigned long get_arm_clk(void)
1591 {
1592         if (cpu_is_exynos5()) {
1593                 return exynos5_get_arm_clk();
1594         } else if (cpu_is_exynos4()) {
1595                 if (proid_is_exynos4412())
1596                         return exynos4x12_get_arm_clk();
1597                 return exynos4_get_arm_clk();
1598         }
1599
1600         return 0;
1601 }
1602
1603 unsigned long get_i2c_clk(void)
1604 {
1605         if (cpu_is_exynos5())
1606                 return clock_get_periph_rate(PERIPH_ID_I2C0);
1607         else if (cpu_is_exynos4())
1608                 return exynos4_get_i2c_clk();
1609
1610         return 0;
1611 }
1612
1613 unsigned long get_pwm_clk(void)
1614 {
1615         if (cpu_is_exynos5()) {
1616                 return clock_get_periph_rate(PERIPH_ID_PWM0);
1617         } else if (cpu_is_exynos4()) {
1618                 if (proid_is_exynos4412())
1619                         return exynos4x12_get_pwm_clk();
1620                 return exynos4_get_pwm_clk();
1621         }
1622
1623         return 0;
1624 }
1625
1626 unsigned long get_uart_clk(int dev_index)
1627 {
1628         enum periph_id id;
1629
1630         switch (dev_index) {
1631         case 0:
1632                 id = PERIPH_ID_UART0;
1633                 break;
1634         case 1:
1635                 id = PERIPH_ID_UART1;
1636                 break;
1637         case 2:
1638                 id = PERIPH_ID_UART2;
1639                 break;
1640         case 3:
1641                 id = PERIPH_ID_UART3;
1642                 break;
1643         default:
1644                 debug("%s: invalid UART index %d", __func__, dev_index);
1645                 return -1;
1646         }
1647
1648         if (cpu_is_exynos5()) {
1649                 return clock_get_periph_rate(id);
1650         } else if (cpu_is_exynos4()) {
1651                 if (proid_is_exynos4412())
1652                         return exynos4x12_get_uart_clk(dev_index);
1653                 return exynos4_get_uart_clk(dev_index);
1654         }
1655
1656         return 0;
1657 }
1658
1659 unsigned long get_mmc_clk(int dev_index)
1660 {
1661         enum periph_id id;
1662
1663         if (cpu_is_exynos4())
1664                 return exynos4_get_mmc_clk(dev_index);
1665
1666         switch (dev_index) {
1667         case 0:
1668                 id = PERIPH_ID_SDMMC0;
1669                 break;
1670         case 1:
1671                 id = PERIPH_ID_SDMMC1;
1672                 break;
1673         case 2:
1674                 id = PERIPH_ID_SDMMC2;
1675                 break;
1676         case 3:
1677                 id = PERIPH_ID_SDMMC3;
1678                 break;
1679         default:
1680                 debug("%s: invalid MMC index %d", __func__, dev_index);
1681                 return -1;
1682         }
1683
1684         return clock_get_periph_rate(id);
1685 }
1686
1687 void set_mmc_clk(int dev_index, unsigned int div)
1688 {
1689         /* If want to set correct value, it needs to substract one from div.*/
1690         if (div > 0)
1691                 div -= 1;
1692
1693         if (cpu_is_exynos5()) {
1694                 if (proid_is_exynos5420() || proid_is_exynos5422())
1695                         exynos5420_set_mmc_clk(dev_index, div);
1696                 else
1697                         exynos5_set_mmc_clk(dev_index, div);
1698         } else if (cpu_is_exynos4()) {
1699                 exynos4_set_mmc_clk(dev_index, div);
1700         }
1701 }
1702
1703 unsigned long get_lcd_clk(void)
1704 {
1705         if (cpu_is_exynos4()) {
1706                 return exynos4_get_lcd_clk();
1707         } else if (cpu_is_exynos5()) {
1708                 if (proid_is_exynos5420())
1709                         return exynos5420_get_lcd_clk();
1710                 else if (proid_is_exynos5422())
1711                         return exynos5800_get_lcd_clk();
1712                 else
1713                         return exynos5_get_lcd_clk();
1714         }
1715
1716         return 0;
1717 }
1718
1719 void set_lcd_clk(void)
1720 {
1721         if (cpu_is_exynos4()) {
1722                 exynos4_set_lcd_clk();
1723         } else if (cpu_is_exynos5()) {
1724                 if (proid_is_exynos5250())
1725                         exynos5_set_lcd_clk();
1726                 else if (proid_is_exynos5420())
1727                         exynos5420_set_lcd_clk();
1728                 else
1729                         exynos5800_set_lcd_clk();
1730         }
1731 }
1732
1733 void set_mipi_clk(void)
1734 {
1735         if (cpu_is_exynos4())
1736                 exynos4_set_mipi_clk();
1737 }
1738
1739 int set_spi_clk(int periph_id, unsigned int rate)
1740 {
1741         if (cpu_is_exynos5()) {
1742                 if (proid_is_exynos5420() || proid_is_exynos5422())
1743                         return exynos5420_set_spi_clk(periph_id, rate);
1744                 return exynos5_set_spi_clk(periph_id, rate);
1745         }
1746
1747         return 0;
1748 }
1749
1750 int set_i2s_clk_prescaler(unsigned int src_frq, unsigned int dst_frq,
1751                           unsigned int i2s_id)
1752 {
1753         if (cpu_is_exynos5())
1754                 return exynos5_set_i2s_clk_prescaler(src_frq, dst_frq, i2s_id);
1755
1756         return 0;
1757 }
1758
1759 int set_i2s_clk_source(unsigned int i2s_id)
1760 {
1761         if (cpu_is_exynos5())
1762                 return exynos5_set_i2s_clk_source(i2s_id);
1763
1764         return 0;
1765 }
1766
1767 int set_epll_clk(unsigned long rate)
1768 {
1769         if (cpu_is_exynos5())
1770                 return exynos5_set_epll_clk(rate);
1771
1772         return 0;
1773 }