arch/arm/mach-s3c64xx/clock.c

   1 /* linux/arch/arm/plat-s3c64xx/clock.c
   2  *
   3  * Copyright 2008 Openmoko, Inc.
   4  * Copyright 2008 Simtec Electronics
   5  *      Ben Dooks <ben@simtec.co.uk>
   6  *      http://armlinux.simtec.co.uk/
   7  *
   8  * S3C64XX Base clock support
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13 */
  14
  15 #include <linux/init.h>
  16 #include <linux/module.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/ioport.h>
  19 #include <linux/clk.h>
  20 #include <linux/err.h>
  21 #include <linux/io.h>
  22
  23 #include <mach/hardware.h>
  24 #include <mach/map.h>
  25
  26 #include <mach/regs-sys.h>
  27 #include <mach/regs-clock.h>
  28
  29 #include <plat/cpu.h>
  30 #include <plat/devs.h>
  31 #include <plat/cpu-freq.h>
  32 #include <plat/clock.h>
  33 #include <plat/clock-clksrc.h>
  34 #include <plat/pll.h>
  35
  36 /* fin_apll, fin_mpll and fin_epll are all the same clock, which we call
  37  * ext_xtal_mux for want of an actual name from the manual.
  38 */
  39
  40 static struct clk clk_ext_xtal_mux = {
  41         .name           = "ext_xtal",
  42 };
  43
  44 #define clk_fin_apll clk_ext_xtal_mux
  45 #define clk_fin_mpll clk_ext_xtal_mux
  46 #define clk_fin_epll clk_ext_xtal_mux
  47
  48 #define clk_fout_mpll   clk_mpll
  49 #define clk_fout_epll   clk_epll
  50
  51 struct clk clk_h2 = {
  52         .name           = "hclk2",
  53         .rate           = 0,
  54 };
  55
  56 struct clk clk_27m = {
  57         .name           = "clk_27m",
  58         .rate           = 27000000,
  59 };
  60
  61 static int clk_48m_ctrl(struct clk *clk, int enable)
  62 {
  63         unsigned long flags;
  64         u32 val;
  65
  66         /* can't rely on clock lock, this register has other usages */
  67         local_irq_save(flags);
  68
  69         val = __raw_readl(S3C64XX_OTHERS);
  70         if (enable)
  71                 val |= S3C64XX_OTHERS_USBMASK;
  72         else
  73                 val &= ~S3C64XX_OTHERS_USBMASK;
  74
  75         __raw_writel(val, S3C64XX_OTHERS);
  76         local_irq_restore(flags);
  77
  78         return 0;
  79 }
  80
  81 struct clk clk_48m = {
  82         .name           = "clk_48m",
  83         .rate           = 48000000,
  84         .enable         = clk_48m_ctrl,
  85 };
  86
  87 struct clk clk_xusbxti = {
  88         .name           = "xusbxti",
  89         .rate           = 48000000,
  90 };
  91
  92 static int inline s3c64xx_gate(void __iomem *reg,
  93                                 struct clk *clk,
  94                                 int enable)
  95 {
  96         unsigned int ctrlbit = clk->ctrlbit;
  97         u32 con;
  98
  99         con = __raw_readl(reg);
 100
 101         if (enable)
 102                 con |= ctrlbit;
 103         else
 104                 con &= ~ctrlbit;
 105
 106         __raw_writel(con, reg);
 107         return 0;
 108 }
 109
 110 static int s3c64xx_pclk_ctrl(struct clk *clk, int enable)
 111 {
 112         return s3c64xx_gate(S3C_PCLK_GATE, clk, enable);
 113 }
 114
 115 static int s3c64xx_hclk_ctrl(struct clk *clk, int enable)
 116 {
 117         return s3c64xx_gate(S3C_HCLK_GATE, clk, enable);
 118 }
 119
 120 int s3c64xx_sclk_ctrl(struct clk *clk, int enable)
 121 {
 122         return s3c64xx_gate(S3C_SCLK_GATE, clk, enable);
 123 }
 124
 125 static struct clk init_clocks_off[] = {
 126         {
 127                 .name           = "nand",
 128                 .parent         = &clk_h,
 129         }, {
 130                 .name           = "rtc",
 131                 .parent         = &clk_p,
 132                 .enable         = s3c64xx_pclk_ctrl,
 133                 .ctrlbit        = S3C_CLKCON_PCLK_RTC,
 134         }, {
 135                 .name           = "adc",
 136                 .parent         = &clk_p,
 137                 .enable         = s3c64xx_pclk_ctrl,
 138                 .ctrlbit        = S3C_CLKCON_PCLK_TSADC,
 139         }, {
 140                 .name           = "i2c",
 141                 .devname        = "s3c2440-i2c.0",
 142                 .parent         = &clk_p,
 143                 .enable         = s3c64xx_pclk_ctrl,
 144                 .ctrlbit        = S3C_CLKCON_PCLK_IIC,
 145         }, {
 146                 .name           = "i2c",
 147                 .devname        = "s3c2440-i2c.1",
 148                 .parent         = &clk_p,
 149                 .enable         = s3c64xx_pclk_ctrl,
 150                 .ctrlbit        = S3C6410_CLKCON_PCLK_I2C1,
 151         }, {
 152                 .name           = "iis",
 153                 .devname        = "samsung-i2s.0",
 154                 .parent         = &clk_p,
 155                 .enable         = s3c64xx_pclk_ctrl,
 156                 .ctrlbit        = S3C_CLKCON_PCLK_IIS0,
 157         }, {
 158                 .name           = "iis",
 159                 .devname        = "samsung-i2s.1",
 160                 .parent         = &clk_p,
 161                 .enable         = s3c64xx_pclk_ctrl,
 162                 .ctrlbit        = S3C_CLKCON_PCLK_IIS1,
 163         }, {
 164 #ifdef CONFIG_CPU_S3C6410
 165                 .name           = "iis",
 166                 .parent         = &clk_p,
 167                 .enable         = s3c64xx_pclk_ctrl,
 168                 .ctrlbit        = S3C6410_CLKCON_PCLK_IIS2,
 169         }, {
 170 #endif
 171                 .name           = "keypad",
 172                 .parent         = &clk_p,
 173                 .enable         = s3c64xx_pclk_ctrl,
 174                 .ctrlbit        = S3C_CLKCON_PCLK_KEYPAD,
 175         }, {
 176                 .name           = "spi",
 177                 .devname        = "s3c6410-spi.0",
 178                 .parent         = &clk_p,
 179                 .enable         = s3c64xx_pclk_ctrl,
 180                 .ctrlbit        = S3C_CLKCON_PCLK_SPI0,
 181         }, {
 182                 .name           = "spi",
 183                 .devname        = "s3c6410-spi.1",
 184                 .parent         = &clk_p,
 185                 .enable         = s3c64xx_pclk_ctrl,
 186                 .ctrlbit        = S3C_CLKCON_PCLK_SPI1,
 187         }, {
 188                 .name           = "48m",
 189                 .devname        = "s3c-sdhci.0",
 190                 .parent         = &clk_48m,
 191                 .enable         = s3c64xx_sclk_ctrl,
 192                 .ctrlbit        = S3C_CLKCON_SCLK_MMC0_48,
 193         }, {
 194                 .name           = "48m",
 195                 .devname        = "s3c-sdhci.1",
 196                 .parent         = &clk_48m,
 197                 .enable         = s3c64xx_sclk_ctrl,
 198                 .ctrlbit        = S3C_CLKCON_SCLK_MMC1_48,
 199         }, {
 200                 .name           = "48m",
 201                 .devname        = "s3c-sdhci.2",
 202                 .parent         = &clk_48m,
 203                 .enable         = s3c64xx_sclk_ctrl,
 204                 .ctrlbit        = S3C_CLKCON_SCLK_MMC2_48,
 205         }, {
 206                 .name           = "ac97",
 207                 .parent         = &clk_p,
 208                 .ctrlbit        = S3C_CLKCON_PCLK_AC97,
 209         }, {
 210                 .name           = "cfcon",
 211                 .parent         = &clk_h,
 212                 .enable         = s3c64xx_hclk_ctrl,
 213                 .ctrlbit        = S3C_CLKCON_HCLK_IHOST,
 214         }, {
 215                 .name           = "dma0",
 216                 .parent         = &clk_h,
 217                 .enable         = s3c64xx_hclk_ctrl,
 218                 .ctrlbit        = S3C_CLKCON_HCLK_DMA0,
 219         }, {
 220                 .name           = "dma1",
 221                 .parent         = &clk_h,
 222                 .enable         = s3c64xx_hclk_ctrl,
 223                 .ctrlbit        = S3C_CLKCON_HCLK_DMA1,
 224         }, {
 225                 .name           = "3dse",
 226                 .parent         = &clk_h,
 227                 .enable         = s3c64xx_hclk_ctrl,
 228                 .ctrlbit        = S3C_CLKCON_HCLK_3DSE,
 229         }, {
 230                 .name           = "hclk_secur",
 231                 .parent         = &clk_h,
 232                 .enable         = s3c64xx_hclk_ctrl,
 233                 .ctrlbit        = S3C_CLKCON_HCLK_SECUR,
 234         }, {
 235                 .name           = "sdma1",
 236                 .parent         = &clk_h,
 237                 .enable         = s3c64xx_hclk_ctrl,
 238                 .ctrlbit        = S3C_CLKCON_HCLK_SDMA1,
 239         }, {
 240                 .name           = "sdma0",
 241                 .parent         = &clk_h,
 242                 .enable         = s3c64xx_hclk_ctrl,
 243                 .ctrlbit        = S3C_CLKCON_HCLK_SDMA0,
 244         }, {
 245                 .name           = "hclk_jpeg",
 246                 .parent         = &clk_h,
 247                 .enable         = s3c64xx_hclk_ctrl,
 248                 .ctrlbit        = S3C_CLKCON_HCLK_JPEG,
 249         }, {
 250                 .name           = "camif",
 251                 .parent         = &clk_h,
 252                 .enable         = s3c64xx_hclk_ctrl,
 253                 .ctrlbit        = S3C_CLKCON_HCLK_CAMIF,
 254         }, {
 255                 .name           = "hclk_scaler",
 256                 .parent         = &clk_h,
 257                 .enable         = s3c64xx_hclk_ctrl,
 258                 .ctrlbit        = S3C_CLKCON_HCLK_SCALER,
 259         }, {
 260                 .name           = "2d",
 261                 .parent         = &clk_h,
 262                 .enable         = s3c64xx_hclk_ctrl,
 263                 .ctrlbit        = S3C_CLKCON_HCLK_2D,
 264         }, {
 265                 .name           = "tv",
 266                 .parent         = &clk_h,
 267                 .enable         = s3c64xx_hclk_ctrl,
 268                 .ctrlbit        = S3C_CLKCON_HCLK_TV,
 269         }, {
 270                 .name           = "post0",
 271                 .parent         = &clk_h,
 272                 .enable         = s3c64xx_hclk_ctrl,
 273                 .ctrlbit        = S3C_CLKCON_HCLK_POST0,
 274         }, {
 275                 .name           = "rot",
 276                 .parent         = &clk_h,
 277                 .enable         = s3c64xx_hclk_ctrl,
 278                 .ctrlbit        = S3C_CLKCON_HCLK_ROT,
 279         }, {
 280                 .name           = "hclk_mfc",
 281                 .parent         = &clk_h,
 282                 .enable         = s3c64xx_hclk_ctrl,
 283                 .ctrlbit        = S3C_CLKCON_HCLK_MFC,
 284         }, {
 285                 .name           = "pclk_mfc",
 286                 .parent         = &clk_p,
 287                 .enable         = s3c64xx_pclk_ctrl,
 288                 .ctrlbit        = S3C_CLKCON_PCLK_MFC,
 289         }, {
 290                 .name           = "dac27",
 291                 .enable         = s3c64xx_sclk_ctrl,
 292                 .ctrlbit        = S3C_CLKCON_SCLK_DAC27,
 293         }, {
 294                 .name           = "tv27",
 295                 .enable         = s3c64xx_sclk_ctrl,
 296                 .ctrlbit        = S3C_CLKCON_SCLK_TV27,
 297         }, {
 298                 .name           = "scaler27",
 299                 .enable         = s3c64xx_sclk_ctrl,
 300                 .ctrlbit        = S3C_CLKCON_SCLK_SCALER27,
 301         }, {
 302                 .name           = "sclk_scaler",
 303                 .enable         = s3c64xx_sclk_ctrl,
 304                 .ctrlbit        = S3C_CLKCON_SCLK_SCALER,
 305         }, {
 306                 .name           = "post0_27",
 307                 .enable         = s3c64xx_sclk_ctrl,
 308                 .ctrlbit        = S3C_CLKCON_SCLK_POST0_27,
 309         }, {
 310                 .name           = "secur",
 311                 .enable         = s3c64xx_sclk_ctrl,
 312                 .ctrlbit        = S3C_CLKCON_SCLK_SECUR,
 313         }, {
 314                 .name           = "sclk_mfc",
 315                 .enable         = s3c64xx_sclk_ctrl,
 316                 .ctrlbit        = S3C_CLKCON_SCLK_MFC,
 317         }, {
 318                 .name           = "sclk_jpeg",
 319                 .enable         = s3c64xx_sclk_ctrl,
 320                 .ctrlbit        = S3C_CLKCON_SCLK_JPEG,
 321         },
 322 };
 323
 324 static struct clk clk_48m_spi0 = {
 325         .name           = "spi_48m",
 326         .devname        = "s3c6410-spi.0",
 327         .parent         = &clk_48m,
 328         .enable         = s3c64xx_sclk_ctrl,
 329         .ctrlbit        = S3C_CLKCON_SCLK_SPI0_48,
 330 };
 331
 332 static struct clk clk_48m_spi1 = {
 333         .name           = "spi_48m",
 334         .devname        = "s3c6410-spi.1",
 335         .parent         = &clk_48m,
 336         .enable         = s3c64xx_sclk_ctrl,
 337         .ctrlbit        = S3C_CLKCON_SCLK_SPI1_48,
 338 };
 339
 340 static struct clk init_clocks[] = {
 341         {
 342                 .name           = "lcd",
 343                 .parent         = &clk_h,
 344                 .enable         = s3c64xx_hclk_ctrl,
 345                 .ctrlbit        = S3C_CLKCON_HCLK_LCD,
 346         }, {
 347                 .name           = "gpio",
 348                 .parent         = &clk_p,
 349                 .enable         = s3c64xx_pclk_ctrl,
 350                 .ctrlbit        = S3C_CLKCON_PCLK_GPIO,
 351         }, {
 352                 .name           = "usb-host",
 353                 .parent         = &clk_h,
 354                 .enable         = s3c64xx_hclk_ctrl,
 355                 .ctrlbit        = S3C_CLKCON_HCLK_UHOST,
 356         }, {
 357                 .name           = "otg",
 358                 .parent         = &clk_h,
 359                 .enable         = s3c64xx_hclk_ctrl,
 360                 .ctrlbit        = S3C_CLKCON_HCLK_USB,
 361         }, {
 362                 .name           = "timers",
 363                 .parent         = &clk_p,
 364                 .enable         = s3c64xx_pclk_ctrl,
 365                 .ctrlbit        = S3C_CLKCON_PCLK_PWM,
 366         }, {
 367                 .name           = "uart",
 368                 .devname        = "s3c6400-uart.0",
 369                 .parent         = &clk_p,
 370                 .enable         = s3c64xx_pclk_ctrl,
 371                 .ctrlbit        = S3C_CLKCON_PCLK_UART0,
 372         }, {
 373                 .name           = "uart",
 374                 .devname        = "s3c6400-uart.1",
 375                 .parent         = &clk_p,
 376                 .enable         = s3c64xx_pclk_ctrl,
 377                 .ctrlbit        = S3C_CLKCON_PCLK_UART1,
 378         }, {
 379                 .name           = "uart",
 380                 .devname        = "s3c6400-uart.2",
 381                 .parent         = &clk_p,
 382                 .enable         = s3c64xx_pclk_ctrl,
 383                 .ctrlbit        = S3C_CLKCON_PCLK_UART2,
 384         }, {
 385                 .name           = "uart",
 386                 .devname        = "s3c6400-uart.3",
 387                 .parent         = &clk_p,
 388                 .enable         = s3c64xx_pclk_ctrl,
 389                 .ctrlbit        = S3C_CLKCON_PCLK_UART3,
 390         }, {
 391                 .name           = "watchdog",
 392                 .parent         = &clk_p,
 393                 .ctrlbit        = S3C_CLKCON_PCLK_WDT,
 394         },
 395 };
 396
 397 static struct clk clk_hsmmc0 = {
 398         .name           = "hsmmc",
 399         .devname        = "s3c-sdhci.0",
 400         .parent         = &clk_h,
 401         .enable         = s3c64xx_hclk_ctrl,
 402         .ctrlbit        = S3C_CLKCON_HCLK_HSMMC0,
 403 };
 404
 405 static struct clk clk_hsmmc1 = {
 406         .name           = "hsmmc",
 407         .devname        = "s3c-sdhci.1",
 408         .parent         = &clk_h,
 409         .enable         = s3c64xx_hclk_ctrl,
 410         .ctrlbit        = S3C_CLKCON_HCLK_HSMMC1,
 411 };
 412
 413 static struct clk clk_hsmmc2 = {
 414         .name           = "hsmmc",
 415         .devname        = "s3c-sdhci.2",
 416         .parent         = &clk_h,
 417         .enable         = s3c64xx_hclk_ctrl,
 418         .ctrlbit        = S3C_CLKCON_HCLK_HSMMC2,
 419 };
 420
 421 static struct clk clk_fout_apll = {
 422         .name           = "fout_apll",
 423 };
 424
 425 static struct clk *clk_src_apll_list[] = {
 426         [0] = &clk_fin_apll,
 427         [1] = &clk_fout_apll,
 428 };
 429
 430 static struct clksrc_sources clk_src_apll = {
 431         .sources        = clk_src_apll_list,
 432         .nr_sources     = ARRAY_SIZE(clk_src_apll_list),
 433 };
 434
 435 static struct clksrc_clk clk_mout_apll = {
 436         .clk    = {
 437                 .name           = "mout_apll",
 438         },
 439         .reg_src        = { .reg = S3C_CLK_SRC, .shift = 0, .size = 1  },
 440         .sources        = &clk_src_apll,
 441 };
 442
 443 static struct clk *clk_src_epll_list[] = {
 444         [0] = &clk_fin_epll,
 445         [1] = &clk_fout_epll,
 446 };
 447
 448 static struct clksrc_sources clk_src_epll = {
 449         .sources        = clk_src_epll_list,
 450         .nr_sources     = ARRAY_SIZE(clk_src_epll_list),
 451 };
 452
 453 static struct clksrc_clk clk_mout_epll = {
 454         .clk    = {
 455                 .name           = "mout_epll",
 456         },
 457         .reg_src        = { .reg = S3C_CLK_SRC, .shift = 2, .size = 1  },
 458         .sources        = &clk_src_epll,
 459 };
 460
 461 static struct clk *clk_src_mpll_list[] = {
 462         [0] = &clk_fin_mpll,
 463         [1] = &clk_fout_mpll,
 464 };
 465
 466 static struct clksrc_sources clk_src_mpll = {
 467         .sources        = clk_src_mpll_list,
 468         .nr_sources     = ARRAY_SIZE(clk_src_mpll_list),
 469 };
 470
 471 static struct clksrc_clk clk_mout_mpll = {
 472         .clk = {
 473                 .name           = "mout_mpll",
 474         },
 475         .reg_src        = { .reg = S3C_CLK_SRC, .shift = 1, .size = 1  },
 476         .sources        = &clk_src_mpll,
 477 };
 478
 479 static unsigned int armclk_mask;
 480
 481 static unsigned long s3c64xx_clk_arm_get_rate(struct clk *clk)
 482 {
 483         unsigned long rate = clk_get_rate(clk->parent);
 484         u32 clkdiv;
 485
 486         /* divisor mask starts at bit0, so no need to shift */
 487         clkdiv = __raw_readl(S3C_CLK_DIV0) & armclk_mask;
 488
 489         return rate / (clkdiv + 1);
 490 }
 491
 492 static unsigned long s3c64xx_clk_arm_round_rate(struct clk *clk,
 493                                                 unsigned long rate)
 494 {
 495         unsigned long parent = clk_get_rate(clk->parent);
 496         u32 div;
 497
 498         if (parent < rate)
 499                 return parent;
 500
 501         div = (parent / rate) - 1;
 502         if (div > armclk_mask)
 503                 div = armclk_mask;
 504
 505         return parent / (div + 1);
 506 }
 507
 508 static int s3c64xx_clk_arm_set_rate(struct clk *clk, unsigned long rate)
 509 {
 510         unsigned long parent = clk_get_rate(clk->parent);
 511         u32 div;
 512         u32 val;
 513
 514         if (rate < parent / (armclk_mask + 1))
 515                 return -EINVAL;
 516
 517         rate = clk_round_rate(clk, rate);
 518         div = clk_get_rate(clk->parent) / rate;
 519
 520         val = __raw_readl(S3C_CLK_DIV0);
 521         val &= ~armclk_mask;
 522         val |= (div - 1);
 523         __raw_writel(val, S3C_CLK_DIV0);
 524
 525         return 0;
 526
 527 }
 528
 529 static struct clk clk_arm = {
 530         .name           = "armclk",
 531         .parent         = &clk_mout_apll.clk,
 532         .ops            = &(struct clk_ops) {
 533                 .get_rate       = s3c64xx_clk_arm_get_rate,
 534                 .set_rate       = s3c64xx_clk_arm_set_rate,
 535                 .round_rate     = s3c64xx_clk_arm_round_rate,
 536         },
 537 };
 538
 539 static unsigned long s3c64xx_clk_doutmpll_get_rate(struct clk *clk)
 540 {
 541         unsigned long rate = clk_get_rate(clk->parent);
 542
 543         printk(KERN_DEBUG "%s: parent is %ld\n", __func__, rate);
 544
 545         if (__raw_readl(S3C_CLK_DIV0) & S3C6400_CLKDIV0_MPLL_MASK)
 546                 rate /= 2;
 547
 548         return rate;
 549 }
 550
 551 static struct clk_ops clk_dout_ops = {
 552         .get_rate       = s3c64xx_clk_doutmpll_get_rate,
 553 };
 554
 555 static struct clk clk_dout_mpll = {
 556         .name           = "dout_mpll",
 557         .parent         = &clk_mout_mpll.clk,
 558         .ops            = &clk_dout_ops,
 559 };
 560
 561 static struct clk *clkset_spi_mmc_list[] = {
 562         &clk_mout_epll.clk,
 563         &clk_dout_mpll,
 564         &clk_fin_epll,
 565         &clk_27m,
 566 };
 567
 568 static struct clksrc_sources clkset_spi_mmc = {
 569         .sources        = clkset_spi_mmc_list,
 570         .nr_sources     = ARRAY_SIZE(clkset_spi_mmc_list),
 571 };
 572
 573 static struct clk *clkset_irda_list[] = {
 574         &clk_mout_epll.clk,
 575         &clk_dout_mpll,
 576         NULL,
 577         &clk_27m,
 578 };
 579
 580 static struct clksrc_sources clkset_irda = {
 581         .sources        = clkset_irda_list,
 582         .nr_sources     = ARRAY_SIZE(clkset_irda_list),
 583 };
 584
 585 static struct clk *clkset_uart_list[] = {
 586         &clk_mout_epll.clk,
 587         &clk_dout_mpll,
 588         NULL,
 589         NULL
 590 };
 591
 592 static struct clksrc_sources clkset_uart = {
 593         .sources        = clkset_uart_list,
 594         .nr_sources     = ARRAY_SIZE(clkset_uart_list),
 595 };
 596
 597 static struct clk *clkset_uhost_list[] = {
 598         &clk_48m,
 599         &clk_mout_epll.clk,
 600         &clk_dout_mpll,
 601         &clk_fin_epll,
 602 };
 603
 604 static struct clksrc_sources clkset_uhost = {
 605         .sources        = clkset_uhost_list,
 606         .nr_sources     = ARRAY_SIZE(clkset_uhost_list),
 607 };
 608
 609 /* The peripheral clocks are all controlled via clocksource followed
 610  * by an optional divider and gate stage. We currently roll this into
 611  * one clock which hides the intermediate clock from the mux.
 612  *
 613  * Note, the JPEG clock can only be an even divider...
 614  *
 615  * The scaler and LCD clocks depend on the S3C64XX version, and also
 616  * have a common parent divisor so are not included here.
 617  */
 618
 619 /* clocks that feed other parts of the clock source tree */
 620
 621 static struct clk clk_iis_cd0 = {
 622         .name           = "iis_cdclk0",
 623 };
 624
 625 static struct clk clk_iis_cd1 = {
 626         .name           = "iis_cdclk1",
 627 };
 628
 629 static struct clk clk_iisv4_cd = {
 630         .name           = "iis_cdclk_v4",
 631 };
 632
 633 static struct clk clk_pcm_cd = {
 634         .name           = "pcm_cdclk",
 635 };
 636
 637 static struct clk *clkset_audio0_list[] = {
 638         [0] = &clk_mout_epll.clk,
 639         [1] = &clk_dout_mpll,
 640         [2] = &clk_fin_epll,
 641         [3] = &clk_iis_cd0,
 642         [4] = &clk_pcm_cd,
 643 };
 644
 645 static struct clksrc_sources clkset_audio0 = {
 646         .sources        = clkset_audio0_list,
 647         .nr_sources     = ARRAY_SIZE(clkset_audio0_list),
 648 };
 649
 650 static struct clk *clkset_audio1_list[] = {
 651         [0] = &clk_mout_epll.clk,
 652         [1] = &clk_dout_mpll,
 653         [2] = &clk_fin_epll,
 654         [3] = &clk_iis_cd1,
 655         [4] = &clk_pcm_cd,
 656 };
 657
 658 static struct clksrc_sources clkset_audio1 = {
 659         .sources        = clkset_audio1_list,
 660         .nr_sources     = ARRAY_SIZE(clkset_audio1_list),
 661 };
 662
 663 static struct clk *clkset_audio2_list[] = {
 664         [0] = &clk_mout_epll.clk,
 665         [1] = &clk_dout_mpll,
 666         [2] = &clk_fin_epll,
 667         [3] = &clk_iisv4_cd,
 668         [4] = &clk_pcm_cd,
 669 };
 670
 671 static struct clksrc_sources clkset_audio2 = {
 672         .sources        = clkset_audio2_list,
 673         .nr_sources     = ARRAY_SIZE(clkset_audio2_list),
 674 };
 675
 676 static struct clksrc_clk clksrcs[] = {
 677         {
 678                 .clk    = {
 679                         .name           = "usb-bus-host",
 680                         .ctrlbit        = S3C_CLKCON_SCLK_UHOST,
 681                         .enable         = s3c64xx_sclk_ctrl,
 682                 },
 683                 .reg_src        = { .reg = S3C_CLK_SRC, .shift = 5, .size = 2  },
 684                 .reg_div        = { .reg = S3C_CLK_DIV1, .shift = 20, .size = 4  },
 685                 .sources        = &clkset_uhost,
 686         }, {
 687                 .clk    = {
 688                         .name           = "audio-bus",
 689                         .devname        = "samsung-i2s.0",
 690                         .ctrlbit        = S3C_CLKCON_SCLK_AUDIO0,
 691                         .enable         = s3c64xx_sclk_ctrl,
 692                 },
 693                 .reg_src        = { .reg = S3C_CLK_SRC, .shift = 7, .size = 3  },
 694                 .reg_div        = { .reg = S3C_CLK_DIV2, .shift = 8, .size = 4  },
 695                 .sources        = &clkset_audio0,
 696         }, {
 697                 .clk    = {
 698                         .name           = "audio-bus",
 699                         .devname        = "samsung-i2s.1",
 700                         .ctrlbit        = S3C_CLKCON_SCLK_AUDIO1,
 701                         .enable         = s3c64xx_sclk_ctrl,
 702                 },
 703                 .reg_src        = { .reg = S3C_CLK_SRC, .shift = 10, .size = 3  },
 704                 .reg_div        = { .reg = S3C_CLK_DIV2, .shift = 12, .size = 4  },
 705                 .sources        = &clkset_audio1,
 706         }, {
 707                 .clk    = {
 708                         .name           = "audio-bus",
 709                         .devname        = "samsung-i2s.2",
 710                         .ctrlbit        = S3C6410_CLKCON_SCLK_AUDIO2,
 711                         .enable         = s3c64xx_sclk_ctrl,
 712                 },
 713                 .reg_src        = { .reg = S3C6410_CLK_SRC2, .shift = 0, .size = 3  },
 714                 .reg_div        = { .reg = S3C_CLK_DIV2, .shift = 24, .size = 4  },
 715                 .sources        = &clkset_audio2,
 716         }, {
 717                 .clk    = {
 718                         .name           = "irda-bus",
 719                         .ctrlbit        = S3C_CLKCON_SCLK_IRDA,
 720                         .enable         = s3c64xx_sclk_ctrl,
 721                 },
 722                 .reg_src        = { .reg = S3C_CLK_SRC, .shift = 24, .size = 2  },
 723                 .reg_div        = { .reg = S3C_CLK_DIV2, .shift = 20, .size = 4  },
 724                 .sources        = &clkset_irda,
 725         }, {
 726                 .clk    = {
 727                         .name           = "camera",
 728                         .ctrlbit        = S3C_CLKCON_SCLK_CAM,
 729                         .enable         = s3c64xx_sclk_ctrl,
 730                         .parent         = &clk_h2,
 731                 },
 732                 .reg_div        = { .reg = S3C_CLK_DIV0, .shift = 20, .size = 4  },
 733         },
 734 };
 735
 736 /* Where does UCLK0 come from? */
 737 static struct clksrc_clk clk_sclk_uclk = {
 738         .clk    = {
 739                 .name           = "uclk1",
 740                 .ctrlbit        = S3C_CLKCON_SCLK_UART,
 741                 .enable         = s3c64xx_sclk_ctrl,
 742         },
 743         .reg_src        = { .reg = S3C_CLK_SRC, .shift = 13, .size = 1  },
 744         .reg_div        = { .reg = S3C_CLK_DIV2, .shift = 16, .size = 4  },
 745         .sources        = &clkset_uart,
 746 };
 747
 748 static struct clksrc_clk clk_sclk_mmc0 = {
 749         .clk    = {
 750                 .name           = "mmc_bus",
 751                 .devname        = "s3c-sdhci.0",
 752                 .ctrlbit        = S3C_CLKCON_SCLK_MMC0,
 753                 .enable         = s3c64xx_sclk_ctrl,
 754         },
 755         .reg_src        = { .reg = S3C_CLK_SRC, .shift = 18, .size = 2  },
 756         .reg_div        = { .reg = S3C_CLK_DIV1, .shift = 0, .size = 4  },
 757         .sources        = &clkset_spi_mmc,
 758 };
 759
 760 static struct clksrc_clk clk_sclk_mmc1 = {
 761         .clk    = {
 762                 .name           = "mmc_bus",
 763                 .devname        = "s3c-sdhci.1",
 764                 .ctrlbit        = S3C_CLKCON_SCLK_MMC1,
 765                 .enable         = s3c64xx_sclk_ctrl,
 766         },
 767         .reg_src        = { .reg = S3C_CLK_SRC, .shift = 20, .size = 2  },
 768         .reg_div        = { .reg = S3C_CLK_DIV1, .shift = 4, .size = 4  },
 769         .sources        = &clkset_spi_mmc,
 770 };
 771
 772 static struct clksrc_clk clk_sclk_mmc2 = {
 773         .clk    = {
 774                 .name           = "mmc_bus",
 775                 .devname        = "s3c-sdhci.2",
 776                 .ctrlbit        = S3C_CLKCON_SCLK_MMC2,
 777                 .enable         = s3c64xx_sclk_ctrl,
 778         },
 779         .reg_src        = { .reg = S3C_CLK_SRC, .shift = 22, .size = 2  },
 780         .reg_div        = { .reg = S3C_CLK_DIV1, .shift = 8, .size = 4  },
 781         .sources        = &clkset_spi_mmc,
 782 };
 783
 784 static struct clksrc_clk clk_sclk_spi0 = {
 785         .clk    = {
 786                 .name           = "spi-bus",
 787                 .devname        = "s3c6410-spi.0",
 788                 .ctrlbit        = S3C_CLKCON_SCLK_SPI0,
 789                 .enable         = s3c64xx_sclk_ctrl,
 790         },
 791         .reg_src = { .reg = S3C_CLK_SRC, .shift = 14, .size = 2 },
 792         .reg_div = { .reg = S3C_CLK_DIV2, .shift = 0, .size = 4 },
 793         .sources = &clkset_spi_mmc,
 794 };
 795
 796 static struct clksrc_clk clk_sclk_spi1 = {
 797         .clk    = {
 798                 .name           = "spi-bus",
 799                 .devname        = "s3c6410-spi.1",
 800                 .ctrlbit        = S3C_CLKCON_SCLK_SPI1,
 801                 .enable         = s3c64xx_sclk_ctrl,
 802         },
 803         .reg_src = { .reg = S3C_CLK_SRC, .shift = 16, .size = 2 },
 804         .reg_div = { .reg = S3C_CLK_DIV2, .shift = 4, .size = 4 },
 805         .sources = &clkset_spi_mmc,
 806 };
 807
 808 /* Clock initialisation code */
 809
 810 static struct clksrc_clk *init_parents[] = {
 811         &clk_mout_apll,
 812         &clk_mout_epll,
 813         &clk_mout_mpll,
 814 };
 815
 816 static struct clksrc_clk *clksrc_cdev[] = {
 817         &clk_sclk_uclk,
 818         &clk_sclk_mmc0,
 819         &clk_sclk_mmc1,
 820         &clk_sclk_mmc2,
 821         &clk_sclk_spi0,
 822         &clk_sclk_spi1,
 823 };
 824
 825 static struct clk *clk_cdev[] = {
 826         &clk_hsmmc0,
 827         &clk_hsmmc1,
 828         &clk_hsmmc2,
 829         &clk_48m_spi0,
 830         &clk_48m_spi1,
 831 };
 832
 833 static struct clk_lookup s3c64xx_clk_lookup[] = {
 834         CLKDEV_INIT(NULL, "clk_uart_baud2", &clk_p),
 835         CLKDEV_INIT(NULL, "clk_uart_baud3", &clk_sclk_uclk.clk),
 836         CLKDEV_INIT("s3c-sdhci.0", "mmc_busclk.0", &clk_hsmmc0),
 837         CLKDEV_INIT("s3c-sdhci.1", "mmc_busclk.0", &clk_hsmmc1),
 838         CLKDEV_INIT("s3c-sdhci.2", "mmc_busclk.0", &clk_hsmmc2),
 839         CLKDEV_INIT("s3c-sdhci.0", "mmc_busclk.2", &clk_sclk_mmc0.clk),
 840         CLKDEV_INIT("s3c-sdhci.1", "mmc_busclk.2", &clk_sclk_mmc1.clk),
 841         CLKDEV_INIT("s3c-sdhci.2", "mmc_busclk.2", &clk_sclk_mmc2.clk),
 842         CLKDEV_INIT(NULL, "spi_busclk0", &clk_p),
 843         CLKDEV_INIT("s3c6410-spi.0", "spi_busclk1", &clk_sclk_spi0.clk),
 844         CLKDEV_INIT("s3c6410-spi.0", "spi_busclk2", &clk_48m_spi0),
 845         CLKDEV_INIT("s3c6410-spi.1", "spi_busclk1", &clk_sclk_spi1.clk),
 846         CLKDEV_INIT("s3c6410-spi.1", "spi_busclk2", &clk_48m_spi1),
 847 };
 848
 849 #define GET_DIV(clk, field) ((((clk) & field##_MASK) >> field##_SHIFT) + 1)
 850
 851 void __init_or_cpufreq s3c64xx_setup_clocks(void)
 852 {
 853         struct clk *xtal_clk;
 854         unsigned long xtal;
 855         unsigned long fclk;
 856         unsigned long hclk;
 857         unsigned long hclk2;
 858         unsigned long pclk;
 859         unsigned long epll;
 860         unsigned long apll;
 861         unsigned long mpll;
 862         unsigned int ptr;
 863         u32 clkdiv0;
 864
 865         printk(KERN_DEBUG "%s: registering clocks\n", __func__);
 866
 867         clkdiv0 = __raw_readl(S3C_CLK_DIV0);
 868         printk(KERN_DEBUG "%s: clkdiv0 = %08x\n", __func__, clkdiv0);
 869
 870         xtal_clk = clk_get(NULL, "xtal");
 871         BUG_ON(IS_ERR(xtal_clk));
 872
 873         xtal = clk_get_rate(xtal_clk);
 874         clk_put(xtal_clk);
 875
 876         printk(KERN_DEBUG "%s: xtal is %ld\n", __func__, xtal);
 877
 878         /* For now assume the mux always selects the crystal */
 879         clk_ext_xtal_mux.parent = xtal_clk;
 880
 881         epll = s3c_get_pll6553x(xtal, __raw_readl(S3C_EPLL_CON0),
 882                                 __raw_readl(S3C_EPLL_CON1));
 883         mpll = s3c6400_get_pll(xtal, __raw_readl(S3C_MPLL_CON));
 884         apll = s3c6400_get_pll(xtal, __raw_readl(S3C_APLL_CON));
 885
 886         fclk = mpll;
 887
 888         printk(KERN_INFO "S3C64XX: PLL settings, A=%ld, M=%ld, E=%ld\n",
 889                apll, mpll, epll);
 890
 891         if(__raw_readl(S3C64XX_OTHERS) & S3C64XX_OTHERS_SYNCMUXSEL)
 892                 /* Synchronous mode */
 893                 hclk2 = apll / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK2);
 894         else
 895                 /* Asynchronous mode */
 896                 hclk2 = mpll / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK2);
 897
 898         hclk = hclk2 / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK);
 899         pclk = hclk2 / GET_DIV(clkdiv0, S3C6400_CLKDIV0_PCLK);
 900
 901         printk(KERN_INFO "S3C64XX: HCLK2=%ld, HCLK=%ld, PCLK=%ld\n",
 902                hclk2, hclk, pclk);
 903
 904         clk_fout_mpll.rate = mpll;
 905         clk_fout_epll.rate = epll;
 906         clk_fout_apll.rate = apll;
 907
 908         clk_h2.rate = hclk2;
 909         clk_h.rate = hclk;
 910         clk_p.rate = pclk;
 911         clk_f.rate = fclk;
 912
 913         for (ptr = 0; ptr < ARRAY_SIZE(init_parents); ptr++)
 914                 s3c_set_clksrc(init_parents[ptr], true);
 915
 916         for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
 917                 s3c_set_clksrc(&clksrcs[ptr], true);
 918 }
 919
 920 static struct clk *clks1[] __initdata = {
 921         &clk_ext_xtal_mux,
 922         &clk_iis_cd0,
 923         &clk_iis_cd1,
 924         &clk_iisv4_cd,
 925         &clk_pcm_cd,
 926         &clk_mout_epll.clk,
 927         &clk_mout_mpll.clk,
 928         &clk_dout_mpll,
 929         &clk_arm,
 930 };
 931
 932 static struct clk *clks[] __initdata = {
 933         &clk_ext,
 934         &clk_epll,
 935         &clk_27m,
 936         &clk_48m,
 937         &clk_h2,
 938         &clk_xusbxti,
 939 };
 940
 941 /**
 942  * s3c64xx_register_clocks - register clocks for s3c6400 and s3c6410
 943  * @xtal: The rate for the clock crystal feeding the PLLs.
 944  * @armclk_divlimit: Divisor mask for ARMCLK.
 945  *
 946  * Register the clocks for the S3C6400 and S3C6410 SoC range, such
 947  * as ARMCLK as well as the necessary parent clocks.
 948  *
 949  * This call does not setup the clocks, which is left to the
 950  * s3c64xx_setup_clocks() call which may be needed by the cpufreq
 951  * or resume code to re-set the clocks if the bootloader has changed
 952  * them.
 953  */
 954 void __init s3c64xx_register_clocks(unsigned long xtal,
 955                                     unsigned armclk_divlimit)
 956 {
 957         unsigned int cnt;
 958
 959         armclk_mask = armclk_divlimit;
 960
 961         s3c24xx_register_baseclocks(xtal);
 962         s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));
 963
 964         s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks));
 965
 966         s3c_register_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
 967         s3c_disable_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
 968
 969         s3c24xx_register_clocks(clk_cdev, ARRAY_SIZE(clk_cdev));
 970         for (cnt = 0; cnt < ARRAY_SIZE(clk_cdev); cnt++)
 971                 s3c_disable_clocks(clk_cdev[cnt], 1);
 972
 973         s3c24xx_register_clocks(clks1, ARRAY_SIZE(clks1));
 974         s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs));
 975         for (cnt = 0; cnt < ARRAY_SIZE(clksrc_cdev); cnt++)
 976                 s3c_register_clksrc(clksrc_cdev[cnt], 1);
 977         clkdev_add_table(s3c64xx_clk_lookup, ARRAY_SIZE(s3c64xx_clk_lookup));
 978
 979         s3c_pwmclk_init();
 980 }