arch/arm/cpu/armv7/exynos/clock.c

   1 /*
   2  * Copyright (C) 2010 Samsung Electronics
   3  * Minkyu Kang <mk7.kang@samsung.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <asm/io.h>
  10 #include <asm/arch/clock.h>
  11 #include <asm/arch/clk.h>
  12 #include <asm/arch/periph.h>
  13
  14 #define PLL_DIV_1024    1024
  15 #define PLL_DIV_65535   65535
  16 #define PLL_DIV_65536   65536
  17
  18 /* *
  19  * This structure is to store the src bit, div bit and prediv bit
  20  * positions of the peripheral clocks of the src and div registers
  21  */
  22 struct clk_bit_info {
  23         int8_t src_bit;
  24         int8_t div_bit;
  25         int8_t prediv_bit;
  26 };
  27
  28 /* src_bit div_bit prediv_bit */
  29 static struct clk_bit_info clk_bit_info[] = {
  30         {0,     0,      -1},
  31         {4,     4,      -1},
  32         {8,     8,      -1},
  33         {12,    12,     -1},
  34         {0,     0,      8},
  35         {4,     16,     24},
  36         {8,     0,      8},
  37         {12,    16,     24},
  38         {-1,    -1,     -1},
  39         {16,    0,      8},
  40         {20,    16,     24},
  41         {24,    0,      8},
  42         {0,     0,      4},
  43         {4,     12,     16},
  44         {-1,    -1,     -1},
  45         {-1,    -1,     -1},
  46         {-1,    24,     0},
  47         {-1,    24,     0},
  48         {-1,    24,     0},
  49         {-1,    24,     0},
  50         {-1,    24,     0},
  51         {-1,    24,     0},
  52         {-1,    24,     0},
  53         {-1,    24,     0},
  54         {24,    0,      -1},
  55         {24,    0,      -1},
  56         {24,    0,      -1},
  57         {24,    0,      -1},
  58         {24,    0,      -1},
  59 };
  60
  61 /* Epll Clock division values to achive different frequency output */
  62 static struct set_epll_con_val exynos5_epll_div[] = {
  63         { 192000000, 0, 48, 3, 1, 0 },
  64         { 180000000, 0, 45, 3, 1, 0 },
  65         {  73728000, 1, 73, 3, 3, 47710 },
  66         {  67737600, 1, 90, 4, 3, 20762 },
  67         {  49152000, 0, 49, 3, 3, 9961 },
  68         {  45158400, 0, 45, 3, 3, 10381 },
  69         { 180633600, 0, 45, 3, 1, 10381 }
  70 };
  71
  72 /* exynos: return pll clock frequency */
  73 static int exynos_get_pll_clk(int pllreg, unsigned int r, unsigned int k)
  74 {
  75         unsigned long m, p, s = 0, mask, fout;
  76         unsigned int div;
  77         unsigned int freq;
  78         /*
  79          * APLL_CON: MIDV [25:16]
  80          * MPLL_CON: MIDV [25:16]
  81          * EPLL_CON: MIDV [24:16]
  82          * VPLL_CON: MIDV [24:16]
  83          * BPLL_CON: MIDV [25:16]: Exynos5
  84          */
  85         if (pllreg == APLL || pllreg == MPLL || pllreg == BPLL ||
  86             pllreg == SPLL)
  87                 mask = 0x3ff;
  88         else
  89                 mask = 0x1ff;
  90
  91         m = (r >> 16) & mask;
  92
  93         /* PDIV [13:8] */
  94         p = (r >> 8) & 0x3f;
  95         /* SDIV [2:0] */
  96         s = r & 0x7;
  97
  98         freq = CONFIG_SYS_CLK_FREQ;
  99
 100         if (pllreg == EPLL || pllreg == RPLL) {
 101                 k = k & 0xffff;
 102                 /* FOUT = (MDIV + K / 65536) * FIN / (PDIV * 2^SDIV) */
 103                 fout = (m + k / PLL_DIV_65536) * (freq / (p * (1 << s)));
 104         } else if (pllreg == VPLL) {
 105                 k = k & 0xfff;
 106
 107                 /*
 108                  * Exynos4210
 109                  * FOUT = (MDIV + K / 1024) * FIN / (PDIV * 2^SDIV)
 110                  *
 111                  * Exynos4412
 112                  * FOUT = (MDIV + K / 65535) * FIN / (PDIV * 2^SDIV)
 113                  *
 114                  * Exynos5250
 115                  * FOUT = (MDIV + K / 65536) * FIN / (PDIV * 2^SDIV)
 116                  */
 117                 if (proid_is_exynos4210())
 118                         div = PLL_DIV_1024;
 119                 else if (proid_is_exynos4412())
 120                         div = PLL_DIV_65535;
 121                 else if (proid_is_exynos5250() || proid_is_exynos5420())
 122                         div = PLL_DIV_65536;
 123                 else
 124                         return 0;
 125
 126                 fout = (m + k / div) * (freq / (p * (1 << s)));
 127         } else {
 128                 /*
 129                  * Exynos4412 / Exynos5250
 130                  * FOUT = MDIV * FIN / (PDIV * 2^SDIV)
 131                  *
 132                  * Exynos4210
 133                  * FOUT = MDIV * FIN / (PDIV * 2^(SDIV-1))
 134                  */
 135                 if (proid_is_exynos4210())
 136                         fout = m * (freq / (p * (1 << (s - 1))));
 137                 else
 138                         fout = m * (freq / (p * (1 << s)));
 139         }
 140         return fout;
 141 }
 142
 143 /* exynos4: return pll clock frequency */
 144 static unsigned long exynos4_get_pll_clk(int pllreg)
 145 {
 146         struct exynos4_clock *clk =
 147                 (struct exynos4_clock *)samsung_get_base_clock();
 148         unsigned long r, k = 0;
 149
 150         switch (pllreg) {
 151         case APLL:
 152                 r = readl(&clk->apll_con0);
 153                 break;
 154         case MPLL:
 155                 r = readl(&clk->mpll_con0);
 156                 break;
 157         case EPLL:
 158                 r = readl(&clk->epll_con0);
 159                 k = readl(&clk->epll_con1);
 160                 break;
 161         case VPLL:
 162                 r = readl(&clk->vpll_con0);
 163                 k = readl(&clk->vpll_con1);
 164                 break;
 165         default:
 166                 printf("Unsupported PLL (%d)\n", pllreg);
 167                 return 0;
 168         }
 169
 170         return exynos_get_pll_clk(pllreg, r, k);
 171 }
 172
 173 /* exynos4x12: return pll clock frequency */
 174 static unsigned long exynos4x12_get_pll_clk(int pllreg)
 175 {
 176         struct exynos4x12_clock *clk =
 177                 (struct exynos4x12_clock *)samsung_get_base_clock();
 178         unsigned long r, k = 0;
 179
 180         switch (pllreg) {
 181         case APLL:
 182                 r = readl(&clk->apll_con0);
 183                 break;
 184         case MPLL:
 185                 r = readl(&clk->mpll_con0);
 186                 break;
 187         case EPLL:
 188                 r = readl(&clk->epll_con0);
 189                 k = readl(&clk->epll_con1);
 190                 break;
 191         case VPLL:
 192                 r = readl(&clk->vpll_con0);
 193                 k = readl(&clk->vpll_con1);
 194                 break;
 195         default:
 196                 printf("Unsupported PLL (%d)\n", pllreg);
 197                 return 0;
 198         }
 199
 200         return exynos_get_pll_clk(pllreg, r, k);
 201 }
 202
 203 /* exynos5: return pll clock frequency */
 204 static unsigned long exynos5_get_pll_clk(int pllreg)
 205 {
 206         struct exynos5_clock *clk =
 207                 (struct exynos5_clock *)samsung_get_base_clock();
 208         unsigned long r, k = 0, fout;
 209         unsigned int pll_div2_sel, fout_sel;
 210
 211         switch (pllreg) {
 212         case APLL:
 213                 r = readl(&clk->apll_con0);
 214                 break;
 215         case MPLL:
 216                 r = readl(&clk->mpll_con0);
 217                 break;
 218         case EPLL:
 219                 r = readl(&clk->epll_con0);
 220                 k = readl(&clk->epll_con1);
 221                 break;
 222         case VPLL:
 223                 r = readl(&clk->vpll_con0);
 224                 k = readl(&clk->vpll_con1);
 225                 break;
 226         case BPLL:
 227                 r = readl(&clk->bpll_con0);
 228                 break;
 229         default:
 230                 printf("Unsupported PLL (%d)\n", pllreg);
 231                 return 0;
 232         }
 233
 234         fout = exynos_get_pll_clk(pllreg, r, k);
 235
 236         /* According to the user manual, in EVT1 MPLL and BPLL always gives
 237          * 1.6GHz clock, so divide by 2 to get 800MHz MPLL clock.*/
 238         if (pllreg == MPLL || pllreg == BPLL) {
 239                 pll_div2_sel = readl(&clk->pll_div2_sel);
 240
 241                 switch (pllreg) {
 242                 case MPLL:
 243                         fout_sel = (pll_div2_sel >> MPLL_FOUT_SEL_SHIFT)
 244                                         & MPLL_FOUT_SEL_MASK;
 245                         break;
 246                 case BPLL:
 247                         fout_sel = (pll_div2_sel >> BPLL_FOUT_SEL_SHIFT)
 248                                         & BPLL_FOUT_SEL_MASK;
 249                         break;
 250                 default:
 251                         fout_sel = -1;
 252                         break;
 253                 }
 254
 255                 if (fout_sel == 0)
 256                         fout /= 2;
 257         }
 258
 259         return fout;
 260 }
 261
 262 static unsigned long exynos5_get_periph_rate(int peripheral)
 263 {
 264         struct clk_bit_info *bit_info = &clk_bit_info[peripheral];
 265         unsigned long sclk, sub_clk;
 266         unsigned int src, div, sub_div;
 267         struct exynos5_clock *clk =
 268                         (struct exynos5_clock *)samsung_get_base_clock();
 269
 270         switch (peripheral) {
 271         case PERIPH_ID_UART0:
 272         case PERIPH_ID_UART1:
 273         case PERIPH_ID_UART2:
 274         case PERIPH_ID_UART3:
 275                 src = readl(&clk->src_peric0);
 276                 div = readl(&clk->div_peric0);
 277                 break;
 278         case PERIPH_ID_PWM0:
 279         case PERIPH_ID_PWM1:
 280         case PERIPH_ID_PWM2:
 281         case PERIPH_ID_PWM3:
 282         case PERIPH_ID_PWM4:
 283                 src = readl(&clk->src_peric0);
 284                 div = readl(&clk->div_peric3);
 285                 break;
 286         case PERIPH_ID_I2S0:
 287                 src = readl(&clk->src_mau);
 288                 div = readl(&clk->div_mau);
 289         case PERIPH_ID_SPI0:
 290         case PERIPH_ID_SPI1:
 291                 src = readl(&clk->src_peric1);
 292                 div = readl(&clk->div_peric1);
 293                 break;
 294         case PERIPH_ID_SPI2:
 295                 src = readl(&clk->src_peric1);
 296                 div = readl(&clk->div_peric2);
 297                 break;
 298         case PERIPH_ID_SPI3:
 299         case PERIPH_ID_SPI4:
 300                 src = readl(&clk->sclk_src_isp);
 301                 div = readl(&clk->sclk_div_isp);
 302                 break;
 303         case PERIPH_ID_SDMMC0:
 304         case PERIPH_ID_SDMMC1:
 305         case PERIPH_ID_SDMMC2:
 306         case PERIPH_ID_SDMMC3:
 307                 src = readl(&clk->src_fsys);
 308                 div = readl(&clk->div_fsys1);
 309                 break;
 310         case PERIPH_ID_I2C0:
 311         case PERIPH_ID_I2C1:
 312         case PERIPH_ID_I2C2:
 313         case PERIPH_ID_I2C3:
 314         case PERIPH_ID_I2C4:
 315         case PERIPH_ID_I2C5:
 316         case PERIPH_ID_I2C6:
 317         case PERIPH_ID_I2C7:
 318                 sclk = exynos5_get_pll_clk(MPLL);
 319                 sub_div = ((readl(&clk->div_top1) >> bit_info->div_bit)
 320                                                                 & 0x7) + 1;
 321                 div = ((readl(&clk->div_top0) >> bit_info->prediv_bit)
 322                                                                 & 0x7) + 1;
 323                 return (sclk / sub_div) / div;
 324         default:
 325                 debug("%s: invalid peripheral %d", __func__, peripheral);
 326                 return -1;
 327         };
 328
 329         src = (src >> bit_info->src_bit) & 0xf;
 330
 331         switch (src) {
 332         case EXYNOS_SRC_MPLL:
 333                 sclk = exynos5_get_pll_clk(MPLL);
 334                 break;
 335         case EXYNOS_SRC_EPLL:
 336                 sclk = exynos5_get_pll_clk(EPLL);
 337                 break;
 338         case EXYNOS_SRC_VPLL:
 339                 sclk = exynos5_get_pll_clk(VPLL);
 340                 break;
 341         default:
 342                 return 0;
 343         }
 344
 345         /* Ratio clock division for this peripheral */
 346         sub_div = (div >> bit_info->div_bit) & 0xf;
 347         sub_clk = sclk / (sub_div + 1);
 348
 349         /* Pre-ratio clock division for SDMMC0 and 2 */
 350         if (peripheral == PERIPH_ID_SDMMC0 || peripheral == PERIPH_ID_SDMMC2) {
 351                 div = (div >> bit_info->prediv_bit) & 0xff;
 352                 return sub_clk / (div + 1);
 353         }
 354
 355         return sub_clk;
 356 }
 357
 358 unsigned long clock_get_periph_rate(int peripheral)
 359 {
 360         if (cpu_is_exynos5())
 361                 return exynos5_get_periph_rate(peripheral);
 362         else
 363                 return 0;
 364 }
 365
 366 /* exynos5420: return pll clock frequency */
 367 static unsigned long exynos5420_get_pll_clk(int pllreg)
 368 {
 369         struct exynos5420_clock *clk =
 370                 (struct exynos5420_clock *)samsung_get_base_clock();
 371         unsigned long r, k = 0;
 372
 373         switch (pllreg) {
 374         case APLL:
 375                 r = readl(&clk->apll_con0);
 376                 break;
 377         case MPLL:
 378                 r = readl(&clk->mpll_con0);
 379                 break;
 380         case EPLL:
 381                 r = readl(&clk->epll_con0);
 382                 k = readl(&clk->epll_con1);
 383                 break;
 384         case VPLL:
 385                 r = readl(&clk->vpll_con0);
 386                 k = readl(&clk->vpll_con1);
 387                 break;
 388         case BPLL:
 389                 r = readl(&clk->bpll_con0);
 390                 break;
 391         case RPLL:
 392                 r = readl(&clk->rpll_con0);
 393                 k = readl(&clk->rpll_con1);
 394                 break;
 395         case SPLL:
 396                 r = readl(&clk->spll_con0);
 397                 break;
 398         default:
 399                 printf("Unsupported PLL (%d)\n", pllreg);
 400                 return 0;
 401         }
 402
 403         return exynos_get_pll_clk(pllreg, r, k);
 404 }
 405
 406 /* exynos4: return ARM clock frequency */
 407 static unsigned long exynos4_get_arm_clk(void)
 408 {
 409         struct exynos4_clock *clk =
 410                 (struct exynos4_clock *)samsung_get_base_clock();
 411         unsigned long div;
 412         unsigned long armclk;
 413         unsigned int core_ratio;
 414         unsigned int core2_ratio;
 415
 416         div = readl(&clk->div_cpu0);
 417
 418         /* CORE_RATIO: [2:0], CORE2_RATIO: [30:28] */
 419         core_ratio = (div >> 0) & 0x7;
 420         core2_ratio = (div >> 28) & 0x7;
 421
 422         armclk = get_pll_clk(APLL) / (core_ratio + 1);
 423         armclk /= (core2_ratio + 1);
 424
 425         return armclk;
 426 }
 427
 428 /* exynos4x12: return ARM clock frequency */
 429 static unsigned long exynos4x12_get_arm_clk(void)
 430 {
 431         struct exynos4x12_clock *clk =
 432                 (struct exynos4x12_clock *)samsung_get_base_clock();
 433         unsigned long div;
 434         unsigned long armclk;
 435         unsigned int core_ratio;
 436         unsigned int core2_ratio;
 437
 438         div = readl(&clk->div_cpu0);
 439
 440         /* CORE_RATIO: [2:0], CORE2_RATIO: [30:28] */
 441         core_ratio = (div >> 0) & 0x7;
 442         core2_ratio = (div >> 28) & 0x7;
 443
 444         armclk = get_pll_clk(APLL) / (core_ratio + 1);
 445         armclk /= (core2_ratio + 1);
 446
 447         return armclk;
 448 }
 449
 450 /* exynos5: return ARM clock frequency */
 451 static unsigned long exynos5_get_arm_clk(void)
 452 {
 453         struct exynos5_clock *clk =
 454                 (struct exynos5_clock *)samsung_get_base_clock();
 455         unsigned long div;
 456         unsigned long armclk;
 457         unsigned int arm_ratio;
 458         unsigned int arm2_ratio;
 459
 460         div = readl(&clk->div_cpu0);
 461
 462         /* ARM_RATIO: [2:0], ARM2_RATIO: [30:28] */
 463         arm_ratio = (div >> 0) & 0x7;
 464         arm2_ratio = (div >> 28) & 0x7;
 465
 466         armclk = get_pll_clk(APLL) / (arm_ratio + 1);
 467         armclk /= (arm2_ratio + 1);
 468
 469         return armclk;
 470 }
 471
 472 /* exynos4: return pwm clock frequency */
 473 static unsigned long exynos4_get_pwm_clk(void)
 474 {
 475         struct exynos4_clock *clk =
 476                 (struct exynos4_clock *)samsung_get_base_clock();
 477         unsigned long pclk, sclk;
 478         unsigned int sel;
 479         unsigned int ratio;
 480
 481         if (s5p_get_cpu_rev() == 0) {
 482                 /*
 483                  * CLK_SRC_PERIL0
 484                  * PWM_SEL [27:24]
 485                  */
 486                 sel = readl(&clk->src_peril0);
 487                 sel = (sel >> 24) & 0xf;
 488
 489                 if (sel == 0x6)
 490                         sclk = get_pll_clk(MPLL);
 491                 else if (sel == 0x7)
 492                         sclk = get_pll_clk(EPLL);
 493                 else if (sel == 0x8)
 494                         sclk = get_pll_clk(VPLL);
 495                 else
 496                         return 0;
 497
 498                 /*
 499                  * CLK_DIV_PERIL3
 500                  * PWM_RATIO [3:0]
 501                  */
 502                 ratio = readl(&clk->div_peril3);
 503                 ratio = ratio & 0xf;
 504         } else if (s5p_get_cpu_rev() == 1) {
 505                 sclk = get_pll_clk(MPLL);
 506                 ratio = 8;
 507         } else
 508                 return 0;
 509
 510         pclk = sclk / (ratio + 1);
 511
 512         return pclk;
 513 }
 514
 515 /* exynos4x12: return pwm clock frequency */
 516 static unsigned long exynos4x12_get_pwm_clk(void)
 517 {
 518         unsigned long pclk, sclk;
 519         unsigned int ratio;
 520
 521         sclk = get_pll_clk(MPLL);
 522         ratio = 8;
 523
 524         pclk = sclk / (ratio + 1);
 525
 526         return pclk;
 527 }
 528
 529 /* exynos5420: return pwm clock frequency */
 530 static unsigned long exynos5420_get_pwm_clk(void)
 531 {
 532         struct exynos5420_clock *clk =
 533                 (struct exynos5420_clock *)samsung_get_base_clock();
 534         unsigned long pclk, sclk;
 535         unsigned int ratio;
 536
 537         /*
 538          * CLK_DIV_PERIC0
 539          * PWM_RATIO [31:28]
 540          */
 541         ratio = readl(&clk->div_peric0);
 542         ratio = (ratio >> 28) & 0xf;
 543         sclk = get_pll_clk(MPLL);
 544
 545         pclk = sclk / (ratio + 1);
 546
 547         return pclk;
 548 }
 549
 550 /* exynos4: return uart clock frequency */
 551 static unsigned long exynos4_get_uart_clk(int dev_index)
 552 {
 553         struct exynos4_clock *clk =
 554                 (struct exynos4_clock *)samsung_get_base_clock();
 555         unsigned long uclk, sclk;
 556         unsigned int sel;
 557         unsigned int ratio;
 558
 559         /*
 560          * CLK_SRC_PERIL0
 561          * UART0_SEL [3:0]
 562          * UART1_SEL [7:4]
 563          * UART2_SEL [8:11]
 564          * UART3_SEL [12:15]
 565          * UART4_SEL [16:19]
 566          * UART5_SEL [23:20]
 567          */
 568         sel = readl(&clk->src_peril0);
 569         sel = (sel >> (dev_index << 2)) & 0xf;
 570
 571         if (sel == 0x6)
 572                 sclk = get_pll_clk(MPLL);
 573         else if (sel == 0x7)
 574                 sclk = get_pll_clk(EPLL);
 575         else if (sel == 0x8)
 576                 sclk = get_pll_clk(VPLL);
 577         else
 578                 return 0;
 579
 580         /*
 581          * CLK_DIV_PERIL0
 582          * UART0_RATIO [3:0]
 583          * UART1_RATIO [7:4]
 584          * UART2_RATIO [8:11]
 585          * UART3_RATIO [12:15]
 586          * UART4_RATIO [16:19]
 587          * UART5_RATIO [23:20]
 588          */
 589         ratio = readl(&clk->div_peril0);
 590         ratio = (ratio >> (dev_index << 2)) & 0xf;
 591
 592         uclk = sclk / (ratio + 1);
 593
 594         return uclk;
 595 }
 596
 597 /* exynos4x12: return uart clock frequency */
 598 static unsigned long exynos4x12_get_uart_clk(int dev_index)
 599 {
 600         struct exynos4x12_clock *clk =
 601                 (struct exynos4x12_clock *)samsung_get_base_clock();
 602         unsigned long uclk, sclk;
 603         unsigned int sel;
 604         unsigned int ratio;
 605
 606         /*
 607          * CLK_SRC_PERIL0
 608          * UART0_SEL [3:0]
 609          * UART1_SEL [7:4]
 610          * UART2_SEL [8:11]
 611          * UART3_SEL [12:15]
 612          * UART4_SEL [16:19]
 613          */
 614         sel = readl(&clk->src_peril0);
 615         sel = (sel >> (dev_index << 2)) & 0xf;
 616
 617         if (sel == 0x6)
 618                 sclk = get_pll_clk(MPLL);
 619         else if (sel == 0x7)
 620                 sclk = get_pll_clk(EPLL);
 621         else if (sel == 0x8)
 622                 sclk = get_pll_clk(VPLL);
 623         else
 624                 return 0;
 625
 626         /*
 627          * CLK_DIV_PERIL0
 628          * UART0_RATIO [3:0]
 629          * UART1_RATIO [7:4]
 630          * UART2_RATIO [8:11]
 631          * UART3_RATIO [12:15]
 632          * UART4_RATIO [16:19]
 633          */
 634         ratio = readl(&clk->div_peril0);
 635         ratio = (ratio >> (dev_index << 2)) & 0xf;
 636
 637         uclk = sclk / (ratio + 1);
 638
 639         return uclk;
 640 }
 641
 642 /* exynos5: return uart clock frequency */
 643 static unsigned long exynos5_get_uart_clk(int dev_index)
 644 {
 645         struct exynos5_clock *clk =
 646                 (struct exynos5_clock *)samsung_get_base_clock();
 647         unsigned long uclk, sclk;
 648         unsigned int sel;
 649         unsigned int ratio;
 650
 651         /*
 652          * CLK_SRC_PERIC0
 653          * UART0_SEL [3:0]
 654          * UART1_SEL [7:4]
 655          * UART2_SEL [8:11]
 656          * UART3_SEL [12:15]
 657          * UART4_SEL [16:19]
 658          * UART5_SEL [23:20]
 659          */
 660         sel = readl(&clk->src_peric0);
 661         sel = (sel >> (dev_index << 2)) & 0xf;
 662
 663         if (sel == 0x6)
 664                 sclk = get_pll_clk(MPLL);
 665         else if (sel == 0x7)
 666                 sclk = get_pll_clk(EPLL);
 667         else if (sel == 0x8)
 668                 sclk = get_pll_clk(VPLL);
 669         else
 670                 return 0;
 671
 672         /*
 673          * CLK_DIV_PERIC0
 674          * UART0_RATIO [3:0]
 675          * UART1_RATIO [7:4]
 676          * UART2_RATIO [8:11]
 677          * UART3_RATIO [12:15]
 678          * UART4_RATIO [16:19]
 679          * UART5_RATIO [23:20]
 680          */
 681         ratio = readl(&clk->div_peric0);
 682         ratio = (ratio >> (dev_index << 2)) & 0xf;
 683
 684         uclk = sclk / (ratio + 1);
 685
 686         return uclk;
 687 }
 688
 689 /* exynos5420: return uart clock frequency */
 690 static unsigned long exynos5420_get_uart_clk(int dev_index)
 691 {
 692         struct exynos5420_clock *clk =
 693                 (struct exynos5420_clock *)samsung_get_base_clock();
 694         unsigned long uclk, sclk;
 695         unsigned int sel;
 696         unsigned int ratio;
 697
 698         /*
 699          * CLK_SRC_PERIC0
 700          * UART0_SEL [6:4]
 701          * UART1_SEL [10:8]
 702          * UART2_SEL [14:12]
 703          * UART3_SEL [18:16]
 704          * generalised calculation as follows
 705          * sel = (sel >> ((dev_index * 4) + 4)) & mask;
 706          */
 707         sel = readl(&clk->src_peric0);
 708         sel = (sel >> ((dev_index * 4) + 4)) & 0x7;
 709
 710         if (sel == 0x3)
 711                 sclk = get_pll_clk(MPLL);
 712         else if (sel == 0x6)
 713                 sclk = get_pll_clk(EPLL);
 714         else if (sel == 0x7)
 715                 sclk = get_pll_clk(RPLL);
 716         else
 717                 return 0;
 718
 719         /*
 720          * CLK_DIV_PERIC0
 721          * UART0_RATIO [11:8]
 722          * UART1_RATIO [15:12]
 723          * UART2_RATIO [19:16]
 724          * UART3_RATIO [23:20]
 725          * generalised calculation as follows
 726          * ratio = (ratio >> ((dev_index * 4) + 8)) & mask;
 727          */
 728         ratio = readl(&clk->div_peric0);
 729         ratio = (ratio >> ((dev_index * 4) + 8)) & 0xf;
 730
 731         uclk = sclk / (ratio + 1);
 732
 733         return uclk;
 734 }
 735
 736 static unsigned long exynos4_get_mmc_clk(int dev_index)
 737 {
 738         struct exynos4_clock *clk =
 739                 (struct exynos4_clock *)samsung_get_base_clock();
 740         unsigned long uclk, sclk;
 741         unsigned int sel, ratio, pre_ratio;
 742         int shift = 0;
 743
 744         sel = readl(&clk->src_fsys);
 745         sel = (sel >> (dev_index << 2)) & 0xf;
 746
 747         if (sel == 0x6)
 748                 sclk = get_pll_clk(MPLL);
 749         else if (sel == 0x7)
 750                 sclk = get_pll_clk(EPLL);
 751         else if (sel == 0x8)
 752                 sclk = get_pll_clk(VPLL);
 753         else
 754                 return 0;
 755
 756         switch (dev_index) {
 757         case 0:
 758         case 1:
 759                 ratio = readl(&clk->div_fsys1);
 760                 pre_ratio = readl(&clk->div_fsys1);
 761                 break;
 762         case 2:
 763         case 3:
 764                 ratio = readl(&clk->div_fsys2);
 765                 pre_ratio = readl(&clk->div_fsys2);
 766                 break;
 767         case 4:
 768                 ratio = readl(&clk->div_fsys3);
 769                 pre_ratio = readl(&clk->div_fsys3);
 770                 break;
 771         default:
 772                 return 0;
 773         }
 774
 775         if (dev_index == 1 || dev_index == 3)
 776                 shift = 16;
 777
 778         ratio = (ratio >> shift) & 0xf;
 779         pre_ratio = (pre_ratio >> (shift + 8)) & 0xff;
 780         uclk = (sclk / (ratio + 1)) / (pre_ratio + 1);
 781
 782         return uclk;
 783 }
 784
 785 static unsigned long exynos5_get_mmc_clk(int dev_index)
 786 {
 787         struct exynos5_clock *clk =
 788                 (struct exynos5_clock *)samsung_get_base_clock();
 789         unsigned long uclk, sclk;
 790         unsigned int sel, ratio, pre_ratio;
 791         int shift = 0;
 792
 793         sel = readl(&clk->src_fsys);
 794         sel = (sel >> (dev_index << 2)) & 0xf;
 795
 796         if (sel == 0x6)
 797                 sclk = get_pll_clk(MPLL);
 798         else if (sel == 0x7)
 799                 sclk = get_pll_clk(EPLL);
 800         else if (sel == 0x8)
 801                 sclk = get_pll_clk(VPLL);
 802         else
 803                 return 0;
 804
 805         switch (dev_index) {
 806         case 0:
 807         case 1:
 808                 ratio = readl(&clk->div_fsys1);
 809                 pre_ratio = readl(&clk->div_fsys1);
 810                 break;
 811         case 2:
 812         case 3:
 813                 ratio = readl(&clk->div_fsys2);
 814                 pre_ratio = readl(&clk->div_fsys2);
 815                 break;
 816         default:
 817                 return 0;
 818         }
 819
 820         if (dev_index == 1 || dev_index == 3)
 821                 shift = 16;
 822
 823         ratio = (ratio >> shift) & 0xf;
 824         pre_ratio = (pre_ratio >> (shift + 8)) & 0xff;
 825         uclk = (sclk / (ratio + 1)) / (pre_ratio + 1);
 826
 827         return uclk;
 828 }
 829
 830 static unsigned long exynos5420_get_mmc_clk(int dev_index)
 831 {
 832         struct exynos5420_clock *clk =
 833                 (struct exynos5420_clock *)samsung_get_base_clock();
 834         unsigned long uclk, sclk;
 835         unsigned int sel, ratio;
 836
 837         /*
 838          * CLK_SRC_FSYS
 839          * MMC0_SEL [10:8]
 840          * MMC1_SEL [14:12]
 841          * MMC2_SEL [18:16]
 842          * generalised calculation as follows
 843          * sel = (sel >> ((dev_index * 4) + 8)) & mask
 844          */
 845         sel = readl(&clk->src_fsys);
 846         sel = (sel >> ((dev_index * 4) + 8)) & 0x7;
 847
 848         if (sel == 0x3)
 849                 sclk = get_pll_clk(MPLL);
 850         else if (sel == 0x6)
 851                 sclk = get_pll_clk(EPLL);
 852         else
 853                 return 0;
 854
 855         /*
 856          * CLK_DIV_FSYS1
 857          * MMC0_RATIO [9:0]
 858          * MMC1_RATIO [19:10]
 859          * MMC2_RATIO [29:20]
 860          * generalised calculation as follows
 861          * ratio = (ratio >> (dev_index * 10)) & mask
 862          */
 863         ratio = readl(&clk->div_fsys1);
 864         ratio = (ratio >> (dev_index * 10)) & 0x3ff;
 865
 866         uclk = (sclk / (ratio + 1));
 867
 868         return uclk;
 869 }
 870
 871 /* exynos4: set the mmc clock */
 872 static void exynos4_set_mmc_clk(int dev_index, unsigned int div)
 873 {
 874         struct exynos4_clock *clk =
 875                 (struct exynos4_clock *)samsung_get_base_clock();
 876         unsigned int addr, clear_bit, set_bit;
 877
 878         /*
 879          * CLK_DIV_FSYS1
 880          * MMC0_PRE_RATIO [15:8], MMC1_PRE_RATIO [31:24]
 881          * CLK_DIV_FSYS2
 882          * MMC2_PRE_RATIO [15:8], MMC3_PRE_RATIO [31:24]
 883          * CLK_DIV_FSYS3
 884          * MMC4_RATIO [3:0]
 885          */
 886         if (dev_index < 2) {
 887                 addr = (unsigned int)&clk->div_fsys1;
 888                 clear_bit = MASK_PRE_RATIO(dev_index);
 889                 set_bit = SET_PRE_RATIO(dev_index, div);
 890         } else if (dev_index == 4) {
 891                 addr = (unsigned int)&clk->div_fsys3;
 892                 dev_index -= 4;
 893                 /* MMC4 is controlled with the MMC4_RATIO value */
 894                 clear_bit = MASK_RATIO(dev_index);
 895                 set_bit = SET_RATIO(dev_index, div);
 896         } else {
 897                 addr = (unsigned int)&clk->div_fsys2;
 898                 dev_index -= 2;
 899                 clear_bit = MASK_PRE_RATIO(dev_index);
 900                 set_bit = SET_PRE_RATIO(dev_index, div);
 901         }
 902
 903         clrsetbits_le32(addr, clear_bit, set_bit);
 904 }
 905
 906 /* exynos5: set the mmc clock */
 907 static void exynos5_set_mmc_clk(int dev_index, unsigned int div)
 908 {
 909         struct exynos5_clock *clk =
 910                 (struct exynos5_clock *)samsung_get_base_clock();
 911         unsigned int addr;
 912
 913         /*
 914          * CLK_DIV_FSYS1
 915          * MMC0_PRE_RATIO [15:8], MMC1_PRE_RATIO [31:24]
 916          * CLK_DIV_FSYS2
 917          * MMC2_PRE_RATIO [15:8], MMC3_PRE_RATIO [31:24]
 918          */
 919         if (dev_index < 2) {
 920                 addr = (unsigned int)&clk->div_fsys1;
 921         } else {
 922                 addr = (unsigned int)&clk->div_fsys2;
 923                 dev_index -= 2;
 924         }
 925
 926         clrsetbits_le32(addr, 0xff << ((dev_index << 4) + 8),
 927                         (div & 0xff) << ((dev_index << 4) + 8));
 928 }
 929
 930 /* exynos5: set the mmc clock */
 931 static void exynos5420_set_mmc_clk(int dev_index, unsigned int div)
 932 {
 933         struct exynos5420_clock *clk =
 934                 (struct exynos5420_clock *)samsung_get_base_clock();
 935         unsigned int addr;
 936         unsigned int shift;
 937
 938         /*
 939          * CLK_DIV_FSYS1
 940          * MMC0_RATIO [9:0]
 941          * MMC1_RATIO [19:10]
 942          * MMC2_RATIO [29:20]
 943          */
 944         addr = (unsigned int)&clk->div_fsys1;
 945         shift = dev_index * 10;
 946
 947         clrsetbits_le32(addr, 0x3ff << shift, (div & 0x3ff) << shift);
 948 }
 949
 950 /* get_lcd_clk: return lcd clock frequency */
 951 static unsigned long exynos4_get_lcd_clk(void)
 952 {
 953         struct exynos4_clock *clk =
 954                 (struct exynos4_clock *)samsung_get_base_clock();
 955         unsigned long pclk, sclk;
 956         unsigned int sel;
 957         unsigned int ratio;
 958
 959         /*
 960          * CLK_SRC_LCD0
 961          * FIMD0_SEL [3:0]
 962          */
 963         sel = readl(&clk->src_lcd0);
 964         sel = sel & 0xf;
 965
 966         /*
 967          * 0x6: SCLK_MPLL
 968          * 0x7: SCLK_EPLL
 969          * 0x8: SCLK_VPLL
 970          */
 971         if (sel == 0x6)
 972                 sclk = get_pll_clk(MPLL);
 973         else if (sel == 0x7)
 974                 sclk = get_pll_clk(EPLL);
 975         else if (sel == 0x8)
 976                 sclk = get_pll_clk(VPLL);
 977         else
 978                 return 0;
 979
 980         /*
 981          * CLK_DIV_LCD0
 982          * FIMD0_RATIO [3:0]
 983          */
 984         ratio = readl(&clk->div_lcd0);
 985         ratio = ratio & 0xf;
 986
 987         pclk = sclk / (ratio + 1);
 988
 989         return pclk;
 990 }
 991
 992 /* get_lcd_clk: return lcd clock frequency */
 993 static unsigned long exynos5_get_lcd_clk(void)
 994 {
 995         struct exynos5_clock *clk =
 996                 (struct exynos5_clock *)samsung_get_base_clock();
 997         unsigned long pclk, sclk;
 998         unsigned int sel;
 999         unsigned int ratio;
1000
1001         /*
1002          * CLK_SRC_LCD0
1003          * FIMD0_SEL [3:0]
1004          */
1005         sel = readl(&clk->src_disp1_0);
1006         sel = sel & 0xf;
1007
1008         /*
1009          * 0x6: SCLK_MPLL
1010          * 0x7: SCLK_EPLL
1011          * 0x8: SCLK_VPLL
1012          */
1013         if (sel == 0x6)
1014                 sclk = get_pll_clk(MPLL);
1015         else if (sel == 0x7)
1016                 sclk = get_pll_clk(EPLL);
1017         else if (sel == 0x8)
1018                 sclk = get_pll_clk(VPLL);
1019         else
1020                 return 0;
1021
1022         /*
1023          * CLK_DIV_LCD0
1024          * FIMD0_RATIO [3:0]
1025          */
1026         ratio = readl(&clk->div_disp1_0);
1027         ratio = ratio & 0xf;
1028
1029         pclk = sclk / (ratio + 1);
1030
1031         return pclk;
1032 }
1033
1034 static unsigned long exynos5420_get_lcd_clk(void)
1035 {
1036         struct exynos5420_clock *clk =
1037                 (struct exynos5420_clock *)samsung_get_base_clock();
1038         unsigned long pclk, sclk;
1039         unsigned int sel;
1040         unsigned int ratio;
1041
1042         /*
1043          * CLK_SRC_DISP10
1044          * FIMD1_SEL [4]
1045          * 0: SCLK_RPLL
1046          * 1: SCLK_SPLL
1047          */
1048         sel = readl(&clk->src_disp10);
1049         sel &= (1 << 4);
1050
1051         if (sel)
1052                 sclk = get_pll_clk(SPLL);
1053         else
1054                 sclk = get_pll_clk(RPLL);
1055
1056         /*
1057          * CLK_DIV_DISP10
1058          * FIMD1_RATIO [3:0]
1059          */
1060         ratio = readl(&clk->div_disp10);
1061         ratio = ratio & 0xf;
1062
1063         pclk = sclk / (ratio + 1);
1064
1065         return pclk;
1066 }
1067
1068 void exynos4_set_lcd_clk(void)
1069 {
1070         struct exynos4_clock *clk =
1071             (struct exynos4_clock *)samsung_get_base_clock();
1072
1073         /*
1074          * CLK_GATE_BLOCK
1075          * CLK_CAM      [0]
1076          * CLK_TV       [1]
1077          * CLK_MFC      [2]
1078          * CLK_G3D      [3]
1079          * CLK_LCD0     [4]
1080          * CLK_LCD1     [5]
1081          * CLK_GPS      [7]
1082          */
1083         setbits_le32(&clk->gate_block, 1 << 4);
1084
1085         /*
1086          * CLK_SRC_LCD0
1087          * FIMD0_SEL            [3:0]
1088          * MDNIE0_SEL           [7:4]
1089          * MDNIE_PWM0_SEL       [8:11]
1090          * MIPI0_SEL            [12:15]
1091          * set lcd0 src clock 0x6: SCLK_MPLL
1092          */
1093         clrsetbits_le32(&clk->src_lcd0, 0xf, 0x6);
1094
1095         /*
1096          * CLK_GATE_IP_LCD0
1097          * CLK_FIMD0            [0]
1098          * CLK_MIE0             [1]
1099          * CLK_MDNIE0           [2]
1100          * CLK_DSIM0            [3]
1101          * CLK_SMMUFIMD0        [4]
1102          * CLK_PPMULCD0         [5]
1103          * Gating all clocks for FIMD0
1104          */
1105         setbits_le32(&clk->gate_ip_lcd0, 1 << 0);
1106
1107         /*
1108          * CLK_DIV_LCD0
1109          * FIMD0_RATIO          [3:0]
1110          * MDNIE0_RATIO         [7:4]
1111          * MDNIE_PWM0_RATIO     [11:8]
1112          * MDNIE_PWM_PRE_RATIO  [15:12]
1113          * MIPI0_RATIO          [19:16]
1114          * MIPI0_PRE_RATIO      [23:20]
1115          * set fimd ratio
1116          */
1117         clrsetbits_le32(&clk->div_lcd0, 0xf, 0x1);
1118 }
1119
1120 void exynos5_set_lcd_clk(void)
1121 {
1122         struct exynos5_clock *clk =
1123             (struct exynos5_clock *)samsung_get_base_clock();
1124
1125         /*
1126          * CLK_GATE_BLOCK
1127          * CLK_CAM      [0]
1128          * CLK_TV       [1]
1129          * CLK_MFC      [2]
1130          * CLK_G3D      [3]
1131          * CLK_LCD0     [4]
1132          * CLK_LCD1     [5]
1133          * CLK_GPS      [7]
1134          */
1135         setbits_le32(&clk->gate_block, 1 << 4);
1136
1137         /*
1138          * CLK_SRC_LCD0
1139          * FIMD0_SEL            [3:0]
1140          * MDNIE0_SEL           [7:4]
1141          * MDNIE_PWM0_SEL       [8:11]
1142          * MIPI0_SEL            [12:15]
1143          * set lcd0 src clock 0x6: SCLK_MPLL
1144          */
1145         clrsetbits_le32(&clk->src_disp1_0, 0xf, 0x6);
1146
1147         /*
1148          * CLK_GATE_IP_LCD0
1149          * CLK_FIMD0            [0]
1150          * CLK_MIE0             [1]
1151          * CLK_MDNIE0           [2]
1152          * CLK_DSIM0            [3]
1153          * CLK_SMMUFIMD0        [4]
1154          * CLK_PPMULCD0         [5]
1155          * Gating all clocks for FIMD0
1156          */
1157         setbits_le32(&clk->gate_ip_disp1, 1 << 0);
1158
1159         /*
1160          * CLK_DIV_LCD0
1161          * FIMD0_RATIO          [3:0]
1162          * MDNIE0_RATIO         [7:4]
1163          * MDNIE_PWM0_RATIO     [11:8]
1164          * MDNIE_PWM_PRE_RATIO  [15:12]
1165          * MIPI0_RATIO          [19:16]
1166          * MIPI0_PRE_RATIO      [23:20]
1167          * set fimd ratio
1168          */
1169         clrsetbits_le32(&clk->div_disp1_0, 0xf, 0x0);
1170 }
1171
1172 void exynos5420_set_lcd_clk(void)
1173 {
1174         struct exynos5420_clock *clk =
1175                 (struct exynos5420_clock *)samsung_get_base_clock();
1176         unsigned int cfg;
1177
1178         /*
1179          * CLK_SRC_DISP10
1180          * FIMD1_SEL [4]
1181          * 0: SCLK_RPLL
1182          * 1: SCLK_SPLL
1183          */
1184         cfg = readl(&clk->src_disp10);
1185         cfg &= ~(0x1 << 4);
1186         cfg |= (0 << 4);
1187         writel(cfg, &clk->src_disp10);
1188
1189         /*
1190          * CLK_DIV_DISP10
1191          * FIMD1_RATIO          [3:0]
1192          */
1193         cfg = readl(&clk->div_disp10);
1194         cfg &= ~(0xf << 0);
1195         cfg |= (0 << 0);
1196         writel(cfg, &clk->div_disp10);
1197 }
1198
1199 void exynos4_set_mipi_clk(void)
1200 {
1201         struct exynos4_clock *clk =
1202             (struct exynos4_clock *)samsung_get_base_clock();
1203
1204         /*
1205          * CLK_SRC_LCD0
1206          * FIMD0_SEL            [3:0]
1207          * MDNIE0_SEL           [7:4]
1208          * MDNIE_PWM0_SEL       [8:11]
1209          * MIPI0_SEL            [12:15]
1210          * set mipi0 src clock 0x6: SCLK_MPLL
1211          */
1212         clrsetbits_le32(&clk->src_lcd0, 0xf << 12, 0x6 << 12);
1213
1214         /*
1215          * CLK_SRC_MASK_LCD0
1216          * FIMD0_MASK           [0]
1217          * MDNIE0_MASK          [4]
1218          * MDNIE_PWM0_MASK      [8]
1219          * MIPI0_MASK           [12]
1220          * set src mask mipi0 0x1: Unmask
1221          */
1222         setbits_le32(&clk->src_mask_lcd0, 0x1 << 12);
1223
1224         /*
1225          * CLK_GATE_IP_LCD0
1226          * CLK_FIMD0            [0]
1227          * CLK_MIE0             [1]
1228          * CLK_MDNIE0           [2]
1229          * CLK_DSIM0            [3]
1230          * CLK_SMMUFIMD0        [4]
1231          * CLK_PPMULCD0         [5]
1232          * Gating all clocks for MIPI0
1233          */
1234         setbits_le32(&clk->gate_ip_lcd0, 1 << 3);
1235
1236         /*
1237          * CLK_DIV_LCD0
1238          * FIMD0_RATIO          [3:0]
1239          * MDNIE0_RATIO         [7:4]
1240          * MDNIE_PWM0_RATIO     [11:8]
1241          * MDNIE_PWM_PRE_RATIO  [15:12]
1242          * MIPI0_RATIO          [19:16]
1243          * MIPI0_PRE_RATIO      [23:20]
1244          * set mipi ratio
1245          */
1246         clrsetbits_le32(&clk->div_lcd0, 0xf << 16, 0x1 << 16);
1247 }
1248
1249 /*
1250  * I2C
1251  *
1252  * exynos5: obtaining the I2C clock
1253  */
1254 static unsigned long exynos5_get_i2c_clk(void)
1255 {
1256         struct exynos5_clock *clk =
1257                 (struct exynos5_clock *)samsung_get_base_clock();
1258         unsigned long aclk_66, aclk_66_pre, sclk;
1259         unsigned int ratio;
1260
1261         sclk = get_pll_clk(MPLL);
1262
1263         ratio = (readl(&clk->div_top1)) >> 24;
1264         ratio &= 0x7;
1265         aclk_66_pre = sclk / (ratio + 1);
1266         ratio = readl(&clk->div_top0);
1267         ratio &= 0x7;
1268         aclk_66 = aclk_66_pre / (ratio + 1);
1269         return aclk_66;
1270 }
1271
1272 int exynos5_set_epll_clk(unsigned long rate)
1273 {
1274         unsigned int epll_con, epll_con_k;
1275         unsigned int i;
1276         unsigned int lockcnt;
1277         unsigned int start;
1278         struct exynos5_clock *clk =
1279                 (struct exynos5_clock *)samsung_get_base_clock();
1280
1281         epll_con = readl(&clk->epll_con0);
1282         epll_con &= ~((EPLL_CON0_LOCK_DET_EN_MASK <<
1283                         EPLL_CON0_LOCK_DET_EN_SHIFT) |
1284                 EPLL_CON0_MDIV_MASK << EPLL_CON0_MDIV_SHIFT |
1285                 EPLL_CON0_PDIV_MASK << EPLL_CON0_PDIV_SHIFT |
1286                 EPLL_CON0_SDIV_MASK << EPLL_CON0_SDIV_SHIFT);
1287
1288         for (i = 0; i < ARRAY_SIZE(exynos5_epll_div); i++) {
1289                 if (exynos5_epll_div[i].freq_out == rate)
1290                         break;
1291         }
1292
1293         if (i == ARRAY_SIZE(exynos5_epll_div))
1294                 return -1;
1295
1296         epll_con_k = exynos5_epll_div[i].k_dsm << 0;
1297         epll_con |= exynos5_epll_div[i].en_lock_det <<
1298                                 EPLL_CON0_LOCK_DET_EN_SHIFT;
1299         epll_con |= exynos5_epll_div[i].m_div << EPLL_CON0_MDIV_SHIFT;
1300         epll_con |= exynos5_epll_div[i].p_div << EPLL_CON0_PDIV_SHIFT;
1301         epll_con |= exynos5_epll_div[i].s_div << EPLL_CON0_SDIV_SHIFT;
1302
1303         /*
1304          * Required period ( in cycles) to genarate a stable clock output.
1305          * The maximum clock time can be up to 3000 * PDIV cycles of PLLs
1306          * frequency input (as per spec)
1307          */
1308         lockcnt = 3000 * exynos5_epll_div[i].p_div;
1309
1310         writel(lockcnt, &clk->epll_lock);
1311         writel(epll_con, &clk->epll_con0);
1312         writel(epll_con_k, &clk->epll_con1);
1313
1314         start = get_timer(0);
1315
1316          while (!(readl(&clk->epll_con0) &
1317                         (0x1 << EXYNOS5_EPLLCON0_LOCKED_SHIFT))) {
1318                 if (get_timer(start) > TIMEOUT_EPLL_LOCK) {
1319                         debug("%s: Timeout waiting for EPLL lock\n", __func__);
1320                         return -1;
1321                 }
1322         }
1323         return 0;
1324 }
1325
1326 int exynos5_set_i2s_clk_source(unsigned int i2s_id)
1327 {
1328         struct exynos5_clock *clk =
1329                 (struct exynos5_clock *)samsung_get_base_clock();
1330         unsigned int *audio_ass = (unsigned int *)samsung_get_base_audio_ass();
1331
1332         if (i2s_id == 0) {
1333                 setbits_le32(&clk->src_top2, CLK_SRC_MOUT_EPLL);
1334                 clrsetbits_le32(&clk->src_mau, AUDIO0_SEL_MASK,
1335                                 (CLK_SRC_SCLK_EPLL));
1336                 setbits_le32(audio_ass, AUDIO_CLKMUX_ASS);
1337         } else if (i2s_id == 1) {
1338                 clrsetbits_le32(&clk->src_peric1, AUDIO1_SEL_MASK,
1339                                 (CLK_SRC_SCLK_EPLL));
1340         } else {
1341                 return -1;
1342         }
1343         return 0;
1344 }
1345
1346 int exynos5_set_i2s_clk_prescaler(unsigned int src_frq,
1347                                   unsigned int dst_frq,
1348                                   unsigned int i2s_id)
1349 {
1350         struct exynos5_clock *clk =
1351                 (struct exynos5_clock *)samsung_get_base_clock();
1352         unsigned int div;
1353
1354         if ((dst_frq == 0) || (src_frq == 0)) {
1355                 debug("%s: Invalid requency input for prescaler\n", __func__);
1356                 debug("src frq = %d des frq = %d ", src_frq, dst_frq);
1357                 return -1;
1358         }
1359
1360         div = (src_frq / dst_frq);
1361         if (i2s_id == 0) {
1362                 if (div > AUDIO_0_RATIO_MASK) {
1363                         debug("%s: Frequency ratio is out of range\n",
1364                               __func__);
1365                         debug("src frq = %d des frq = %d ", src_frq, dst_frq);
1366                         return -1;
1367                 }
1368                 clrsetbits_le32(&clk->div_mau, AUDIO_0_RATIO_MASK,
1369                                 (div & AUDIO_0_RATIO_MASK));
1370         } else if(i2s_id == 1) {
1371                 if (div > AUDIO_1_RATIO_MASK) {
1372                         debug("%s: Frequency ratio is out of range\n",
1373                               __func__);
1374                         debug("src frq = %d des frq = %d ", src_frq, dst_frq);
1375                         return -1;
1376                 }
1377                 clrsetbits_le32(&clk->div_peric4, AUDIO_1_RATIO_MASK,
1378                                 (div & AUDIO_1_RATIO_MASK));
1379         } else {
1380                 return -1;
1381         }
1382         return 0;
1383 }
1384
1385 /**
1386  * Linearly searches for the most accurate main and fine stage clock scalars
1387  * (divisors) for a specified target frequency and scalar bit sizes by checking
1388  * all multiples of main_scalar_bits values. Will always return scalars up to or
1389  * slower than target.
1390  *
1391  * @param main_scalar_bits      Number of main scalar bits, must be > 0 and < 32
1392  * @param fine_scalar_bits      Number of fine scalar bits, must be > 0 and < 32
1393  * @param input_freq            Clock frequency to be scaled in Hz
1394  * @param target_freq           Desired clock frequency in Hz
1395  * @param best_fine_scalar      Pointer to store the fine stage divisor
1396  *
1397  * @return best_main_scalar     Main scalar for desired frequency or -1 if none
1398  * found
1399  */
1400 static int clock_calc_best_scalar(unsigned int main_scaler_bits,
1401         unsigned int fine_scalar_bits, unsigned int input_rate,
1402         unsigned int target_rate, unsigned int *best_fine_scalar)
1403 {
1404         int i;
1405         int best_main_scalar = -1;
1406         unsigned int best_error = target_rate;
1407         const unsigned int cap = (1 << fine_scalar_bits) - 1;
1408         const unsigned int loops = 1 << main_scaler_bits;
1409
1410         debug("Input Rate is %u, Target is %u, Cap is %u\n", input_rate,
1411                         target_rate, cap);
1412
1413         assert(best_fine_scalar != NULL);
1414         assert(main_scaler_bits <= fine_scalar_bits);
1415
1416         *best_fine_scalar = 1;
1417
1418         if (input_rate == 0 || target_rate == 0)
1419                 return -1;
1420
1421         if (target_rate >= input_rate)
1422                 return 1;
1423
1424         for (i = 1; i <= loops; i++) {
1425                 const unsigned int effective_div =
1426                         max(min(input_rate / i / target_rate, cap), 1U);
1427                 const unsigned int effective_rate = input_rate / i /
1428                                                         effective_div;
1429                 const int error = target_rate - effective_rate;
1430
1431                 debug("%d|effdiv:%u, effrate:%u, error:%d\n", i, effective_div,
1432                                 effective_rate, error);
1433
1434                 if (error >= 0 && error <= best_error) {
1435                         best_error = error;
1436                         best_main_scalar = i;
1437                         *best_fine_scalar = effective_div;
1438                 }
1439         }
1440
1441         return best_main_scalar;
1442 }
1443
1444 static int exynos5_set_spi_clk(enum periph_id periph_id,
1445                                         unsigned int rate)
1446 {
1447         struct exynos5_clock *clk =
1448                 (struct exynos5_clock *)samsung_get_base_clock();
1449         int main;
1450         unsigned int fine;
1451         unsigned shift, pre_shift;
1452         unsigned mask = 0xff;
1453         u32 *reg;
1454
1455         main = clock_calc_best_scalar(4, 8, 400000000, rate, &fine);
1456         if (main < 0) {
1457                 debug("%s: Cannot set clock rate for periph %d",
1458                                 __func__, periph_id);
1459                 return -1;
1460         }
1461         main = main - 1;
1462         fine = fine - 1;
1463
1464         switch (periph_id) {
1465         case PERIPH_ID_SPI0:
1466                 reg = &clk->div_peric1;
1467                 shift = 0;
1468                 pre_shift = 8;
1469                 break;
1470         case PERIPH_ID_SPI1:
1471                 reg = &clk->div_peric1;
1472                 shift = 16;
1473                 pre_shift = 24;
1474                 break;
1475         case PERIPH_ID_SPI2:
1476                 reg = &clk->div_peric2;
1477                 shift = 0;
1478                 pre_shift = 8;
1479                 break;
1480         case PERIPH_ID_SPI3:
1481                 reg = &clk->sclk_div_isp;
1482                 shift = 0;
1483                 pre_shift = 4;
1484                 break;
1485         case PERIPH_ID_SPI4:
1486                 reg = &clk->sclk_div_isp;
1487                 shift = 12;
1488                 pre_shift = 16;
1489                 break;
1490         default:
1491                 debug("%s: Unsupported peripheral ID %d\n", __func__,
1492                       periph_id);
1493                 return -1;
1494         }
1495         clrsetbits_le32(reg, mask << shift, (main & mask) << shift);
1496         clrsetbits_le32(reg, mask << pre_shift, (fine & mask) << pre_shift);
1497
1498         return 0;
1499 }
1500
1501 static int exynos5420_set_spi_clk(enum periph_id periph_id,
1502                                         unsigned int rate)
1503 {
1504         struct exynos5420_clock *clk =
1505                 (struct exynos5420_clock *)samsung_get_base_clock();
1506         int main;
1507         unsigned int fine;
1508         unsigned shift, pre_shift;
1509         unsigned div_mask = 0xf, pre_div_mask = 0xff;
1510         u32 *reg;
1511         u32 *pre_reg;
1512
1513         main = clock_calc_best_scalar(4, 8, 400000000, rate, &fine);
1514         if (main < 0) {
1515                 debug("%s: Cannot set clock rate for periph %d",
1516                       __func__, periph_id);
1517                 return -1;
1518         }
1519         main = main - 1;
1520         fine = fine - 1;
1521
1522         switch (periph_id) {
1523         case PERIPH_ID_SPI0:
1524                 reg = &clk->div_peric1;
1525                 shift = 20;
1526                 pre_reg = &clk->div_peric4;
1527                 pre_shift = 8;
1528                 break;
1529         case PERIPH_ID_SPI1:
1530                 reg = &clk->div_peric1;
1531                 shift = 24;
1532                 pre_reg = &clk->div_peric4;
1533                 pre_shift = 16;
1534                 break;
1535         case PERIPH_ID_SPI2:
1536                 reg = &clk->div_peric1;
1537                 shift = 28;
1538                 pre_reg = &clk->div_peric4;
1539                 pre_shift = 24;
1540                 break;
1541         case PERIPH_ID_SPI3:
1542                 reg = &clk->div_isp1;
1543                 shift = 16;
1544                 pre_reg = &clk->div_isp1;
1545                 pre_shift = 0;
1546                 break;
1547         case PERIPH_ID_SPI4:
1548                 reg = &clk->div_isp1;
1549                 shift = 20;
1550                 pre_reg = &clk->div_isp1;
1551                 pre_shift = 8;
1552                 break;
1553         default:
1554                 debug("%s: Unsupported peripheral ID %d\n", __func__,
1555                       periph_id);
1556                 return -1;
1557         }
1558
1559         clrsetbits_le32(reg, div_mask << shift, (main & div_mask) << shift);
1560         clrsetbits_le32(pre_reg, pre_div_mask << pre_shift,
1561                         (fine & pre_div_mask) << pre_shift);
1562
1563         return 0;
1564 }
1565
1566 static unsigned long exynos4_get_i2c_clk(void)
1567 {
1568         struct exynos4_clock *clk =
1569                 (struct exynos4_clock *)samsung_get_base_clock();
1570         unsigned long sclk, aclk_100;
1571         unsigned int ratio;
1572
1573         sclk = get_pll_clk(APLL);
1574
1575         ratio = (readl(&clk->div_top)) >> 4;
1576         ratio &= 0xf;
1577         aclk_100 = sclk / (ratio + 1);
1578         return aclk_100;
1579 }
1580
1581 unsigned long get_pll_clk(int pllreg)
1582 {
1583         if (cpu_is_exynos5()) {
1584                 if (proid_is_exynos5420())
1585                         return exynos5420_get_pll_clk(pllreg);
1586                 return exynos5_get_pll_clk(pllreg);
1587         } else {
1588                 if (proid_is_exynos4412())
1589                         return exynos4x12_get_pll_clk(pllreg);
1590                 return exynos4_get_pll_clk(pllreg);
1591         }
1592 }
1593
1594 unsigned long get_arm_clk(void)
1595 {
1596         if (cpu_is_exynos5())
1597                 return exynos5_get_arm_clk();
1598         else {
1599                 if (proid_is_exynos4412())
1600                         return exynos4x12_get_arm_clk();
1601                 return exynos4_get_arm_clk();
1602         }
1603 }
1604
1605 unsigned long get_i2c_clk(void)
1606 {
1607         if (cpu_is_exynos5()) {
1608                 return exynos5_get_i2c_clk();
1609         } else if (cpu_is_exynos4()) {
1610                 return exynos4_get_i2c_clk();
1611         } else {
1612                 debug("I2C clock is not set for this CPU\n");
1613                 return 0;
1614         }
1615 }
1616
1617 unsigned long get_pwm_clk(void)
1618 {
1619         if (cpu_is_exynos5()) {
1620                 if (proid_is_exynos5420())
1621                         return exynos5420_get_pwm_clk();
1622                 return clock_get_periph_rate(PERIPH_ID_PWM0);
1623         } else {
1624                 if (proid_is_exynos4412())
1625                         return exynos4x12_get_pwm_clk();
1626                 return exynos4_get_pwm_clk();
1627         }
1628 }
1629
1630 unsigned long get_uart_clk(int dev_index)
1631 {
1632         if (cpu_is_exynos5()) {
1633                 if (proid_is_exynos5420())
1634                         return exynos5420_get_uart_clk(dev_index);
1635                 return exynos5_get_uart_clk(dev_index);
1636         } else {
1637                 if (proid_is_exynos4412())
1638                         return exynos4x12_get_uart_clk(dev_index);
1639                 return exynos4_get_uart_clk(dev_index);
1640         }
1641 }
1642
1643 unsigned long get_mmc_clk(int dev_index)
1644 {
1645         if (cpu_is_exynos5()) {
1646                 if (proid_is_exynos5420())
1647                         return exynos5420_get_mmc_clk(dev_index);
1648                 return exynos5_get_mmc_clk(dev_index);
1649         } else {
1650                 return exynos4_get_mmc_clk(dev_index);
1651         }
1652 }
1653
1654 void set_mmc_clk(int dev_index, unsigned int div)
1655 {
1656         if (cpu_is_exynos5()) {
1657                 if (proid_is_exynos5420())
1658                         exynos5420_set_mmc_clk(dev_index, div);
1659                 else
1660                         exynos5_set_mmc_clk(dev_index, div);
1661         } else {
1662                 exynos4_set_mmc_clk(dev_index, div);
1663         }
1664 }
1665
1666 unsigned long get_lcd_clk(void)
1667 {
1668         if (cpu_is_exynos4())
1669                 return exynos4_get_lcd_clk();
1670         else {
1671                 if (proid_is_exynos5420())
1672                         return exynos5420_get_lcd_clk();
1673                 else
1674                         return exynos5_get_lcd_clk();
1675         }
1676 }
1677
1678 void set_lcd_clk(void)
1679 {
1680         if (cpu_is_exynos4())
1681                 exynos4_set_lcd_clk();
1682         else {
1683                 if (proid_is_exynos5250())
1684                         exynos5_set_lcd_clk();
1685                 else if (proid_is_exynos5420())
1686                         exynos5420_set_lcd_clk();
1687         }
1688 }
1689
1690 void set_mipi_clk(void)
1691 {
1692         if (cpu_is_exynos4())
1693                 exynos4_set_mipi_clk();
1694 }
1695
1696 int set_spi_clk(int periph_id, unsigned int rate)
1697 {
1698         if (cpu_is_exynos5()) {
1699                 if (proid_is_exynos5420())
1700                         return exynos5420_set_spi_clk(periph_id, rate);
1701                 return exynos5_set_spi_clk(periph_id, rate);
1702         } else {
1703                 return 0;
1704         }
1705 }
1706
1707 int set_i2s_clk_prescaler(unsigned int src_frq, unsigned int dst_frq,
1708                           unsigned int i2s_id)
1709 {
1710         if (cpu_is_exynos5())
1711                 return exynos5_set_i2s_clk_prescaler(src_frq, dst_frq, i2s_id);
1712         else
1713                 return 0;
1714 }
1715
1716 int set_i2s_clk_source(unsigned int i2s_id)
1717 {
1718         if (cpu_is_exynos5())
1719                 return exynos5_set_i2s_clk_source(i2s_id);
1720         else
1721                 return 0;
1722 }
1723
1724 int set_epll_clk(unsigned long rate)
1725 {
1726         if (cpu_is_exynos5())
1727                 return exynos5_set_epll_clk(rate);
1728         else
1729                 return 0;
1730 }