arch/powerpc/cpu/mpc85xx/speed.c

   1 /*
   2  * Copyright 2004, 2007-2011 Freescale Semiconductor, Inc.
   3  *
   4  * (C) Copyright 2003 Motorola Inc.
   5  * Xianghua Xiao, (X.Xiao@motorola.com)
   6  *
   7  * (C) Copyright 2000
   8  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   9  *
  10  * See file CREDITS for list of people who contributed to this
  11  * project.
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License as
  15  * published by the Free Software Foundation; either version 2 of
  16  * the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  26  * MA 02111-1307 USA
  27  */
  28
  29 #include <common.h>
  30 #include <ppc_asm.tmpl>
  31 #include <linux/compiler.h>
  32 #include <asm/processor.h>
  33 #include <asm/io.h>
  34
  35 DECLARE_GLOBAL_DATA_PTR;
  36
  37 /* --------------------------------------------------------------- */
  38
  39 void get_sys_info (sys_info_t * sysInfo)
  40 {
  41         volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
  42 #ifdef CONFIG_FSL_IFC
  43         struct fsl_ifc *ifc_regs = (void *)CONFIG_SYS_IFC_ADDR;
  44         u32 ccr;
  45 #endif
  46 #ifdef CONFIG_FSL_CORENET
  47         volatile ccsr_clk_t *clk = (void *)(CONFIG_SYS_FSL_CORENET_CLK_ADDR);
  48         unsigned int cpu;
  49
  50         const u8 core_cplx_PLL[16] = {
  51                 [ 0] = 0,       /* CC1 PPL / 1 */
  52                 [ 1] = 0,       /* CC1 PPL / 2 */
  53                 [ 2] = 0,       /* CC1 PPL / 4 */
  54                 [ 4] = 1,       /* CC2 PPL / 1 */
  55                 [ 5] = 1,       /* CC2 PPL / 2 */
  56                 [ 6] = 1,       /* CC2 PPL / 4 */
  57                 [ 8] = 2,       /* CC3 PPL / 1 */
  58                 [ 9] = 2,       /* CC3 PPL / 2 */
  59                 [10] = 2,       /* CC3 PPL / 4 */
  60                 [12] = 3,       /* CC4 PPL / 1 */
  61                 [13] = 3,       /* CC4 PPL / 2 */
  62                 [14] = 3,       /* CC4 PPL / 4 */
  63         };
  64
  65         const u8 core_cplx_PLL_div[16] = {
  66                 [ 0] = 1,       /* CC1 PPL / 1 */
  67                 [ 1] = 2,       /* CC1 PPL / 2 */
  68                 [ 2] = 4,       /* CC1 PPL / 4 */
  69                 [ 4] = 1,       /* CC2 PPL / 1 */
  70                 [ 5] = 2,       /* CC2 PPL / 2 */
  71                 [ 6] = 4,       /* CC2 PPL / 4 */
  72                 [ 8] = 1,       /* CC3 PPL / 1 */
  73                 [ 9] = 2,       /* CC3 PPL / 2 */
  74                 [10] = 4,       /* CC3 PPL / 4 */
  75                 [12] = 1,       /* CC4 PPL / 1 */
  76                 [13] = 2,       /* CC4 PPL / 2 */
  77                 [14] = 4,       /* CC4 PPL / 4 */
  78         };
  79         uint i, freqCC_PLL[6], rcw_tmp;
  80         uint ratio[6];
  81         unsigned long sysclk = CONFIG_SYS_CLK_FREQ;
  82         uint mem_pll_rat;
  83
  84         sysInfo->freqSystemBus = sysclk;
  85 #ifdef CONFIG_DDR_CLK_FREQ
  86         sysInfo->freqDDRBus = CONFIG_DDR_CLK_FREQ;
  87 #else
  88         sysInfo->freqDDRBus = sysclk;
  89 #endif
  90
  91         sysInfo->freqSystemBus *= (in_be32(&gur->rcwsr[0]) >> 25) & 0x1f;
  92         mem_pll_rat = (in_be32(&gur->rcwsr[0]) >>
  93                         FSL_CORENET_RCWSR0_MEM_PLL_RAT_SHIFT)
  94                         & FSL_CORENET_RCWSR0_MEM_PLL_RAT_MASK;
  95         if (mem_pll_rat > 2)
  96                 sysInfo->freqDDRBus *= mem_pll_rat;
  97         else
  98                 sysInfo->freqDDRBus = sysInfo->freqSystemBus * mem_pll_rat;
  99
 100         ratio[0] = (in_be32(&clk->pllc1gsr) >> 1) & 0x3f;
 101         ratio[1] = (in_be32(&clk->pllc2gsr) >> 1) & 0x3f;
 102         ratio[2] = (in_be32(&clk->pllc3gsr) >> 1) & 0x3f;
 103         ratio[3] = (in_be32(&clk->pllc4gsr) >> 1) & 0x3f;
 104         ratio[4] = (in_be32(&clk->pllc5gsr) >> 1) & 0x3f;
 105         ratio[5] = (in_be32(&clk->pllc6gsr) >> 1) & 0x3f;
 106         for (i = 0; i < 6; i++) {
 107                 if (ratio[i] > 4)
 108                         freqCC_PLL[i] = sysclk * ratio[i];
 109                 else
 110                         freqCC_PLL[i] = sysInfo->freqSystemBus * ratio[i];
 111         }
 112 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
 113         /*
 114          * Each cluster has up to 4 cores, sharing the same PLL selection.
 115          * The cluster assignment is fixed per SoC. There is no way identify the
 116          * assignment so far, presuming the "first configuration" which is to
 117          * fill the lower cluster group first before moving up to next group.
 118          * PLL1, PLL2, PLL3 are cluster group A, feeding core 0~3 on cluster 1
 119          * and core 4~7 on cluster 2
 120          * PLL4, PLL5, PLL6 are cluster group B, feeding core 8~11 on cluster 3
 121          * and core 12~15 on cluster 4 if existing
 122          */
 123         for_each_cpu(i, cpu, cpu_numcores(), cpu_mask()) {
 124                 u32 c_pll_sel = (in_be32(&clk->clkc0csr + (cpu / 4) * 8) >> 27)
 125                                 & 0xf;
 126                 u32 cplx_pll = core_cplx_PLL[c_pll_sel];
 127                 if (cplx_pll > 3)
 128                         printf("Unsupported architecture configuration"
 129                                 " in function %s\n", __func__);
 130                 cplx_pll += (cpu / 8) * 3;
 131
 132                 sysInfo->freqProcessor[cpu] =
 133                          freqCC_PLL[cplx_pll] / core_cplx_PLL_div[c_pll_sel];
 134         }
 135 #ifdef CONFIG_PPC_B4860
 136 #define FM1_CLK_SEL     0xe0000000
 137 #define FM1_CLK_SHIFT   29
 138 #else
 139 #define PME_CLK_SEL     0xe0000000
 140 #define PME_CLK_SHIFT   29
 141 #define FM1_CLK_SEL     0x1c000000
 142 #define FM1_CLK_SHIFT   26
 143 #endif
 144         rcw_tmp = in_be32(&gur->rcwsr[7]);
 145
 146 #ifdef CONFIG_SYS_DPAA_PME
 147         switch ((rcw_tmp & PME_CLK_SEL) >> PME_CLK_SHIFT) {
 148         case 1:
 149                 sysInfo->freqPME = freqCC_PLL[0];
 150                 break;
 151         case 2:
 152                 sysInfo->freqPME = freqCC_PLL[0] / 2;
 153                 break;
 154         case 3:
 155                 sysInfo->freqPME = freqCC_PLL[0] / 3;
 156                 break;
 157         case 4:
 158                 sysInfo->freqPME = freqCC_PLL[0] / 4;
 159                 break;
 160         case 6:
 161                 sysInfo->freqPME = freqCC_PLL[1] / 2;
 162                 break;
 163         case 7:
 164                 sysInfo->freqPME = freqCC_PLL[1] / 3;
 165                 break;
 166         default:
 167                 printf("Error: Unknown PME clock select!\n");
 168         case 0:
 169                 sysInfo->freqPME = sysInfo->freqSystemBus / 2;
 170                 break;
 171
 172         }
 173 #endif
 174
 175 #ifdef CONFIG_SYS_DPAA_QBMAN
 176         sysInfo->freqQMAN = sysInfo->freqSystemBus / 2;
 177 #endif
 178
 179 #ifdef CONFIG_SYS_DPAA_FMAN
 180         switch ((rcw_tmp & FM1_CLK_SEL) >> FM1_CLK_SHIFT) {
 181         case 1:
 182                 sysInfo->freqFMan[0] = freqCC_PLL[3];
 183                 break;
 184         case 2:
 185                 sysInfo->freqFMan[0] = freqCC_PLL[3] / 2;
 186                 break;
 187         case 3:
 188                 sysInfo->freqFMan[0] = freqCC_PLL[3] / 3;
 189                 break;
 190         case 4:
 191                 sysInfo->freqFMan[0] = freqCC_PLL[3] / 4;
 192                 break;
 193         case 5:
 194                 sysInfo->freqFMan[0] = sysInfo->freqSystemBus;
 195                 break;
 196         case 6:
 197                 sysInfo->freqFMan[0] = freqCC_PLL[4] / 2;
 198                 break;
 199         case 7:
 200                 sysInfo->freqFMan[0] = freqCC_PLL[4] / 3;
 201                 break;
 202         default:
 203                 printf("Error: Unknown FMan1 clock select!\n");
 204         case 0:
 205                 sysInfo->freqFMan[0] = sysInfo->freqSystemBus / 2;
 206                 break;
 207         }
 208 #if (CONFIG_SYS_NUM_FMAN) == 2
 209 #define FM2_CLK_SEL     0x00000038
 210 #define FM2_CLK_SHIFT   3
 211         rcw_tmp = in_be32(&gur->rcwsr[15]);
 212         switch ((rcw_tmp & FM2_CLK_SEL) >> FM2_CLK_SHIFT) {
 213         case 1:
 214                 sysInfo->freqFMan[1] = freqCC_PLL[4];
 215                 break;
 216         case 2:
 217                 sysInfo->freqFMan[1] = freqCC_PLL[4] / 2;
 218                 break;
 219         case 3:
 220                 sysInfo->freqFMan[1] = freqCC_PLL[4] / 3;
 221                 break;
 222         case 4:
 223                 sysInfo->freqFMan[1] = freqCC_PLL[4] / 4;
 224                 break;
 225         case 6:
 226                 sysInfo->freqFMan[1] = freqCC_PLL[3] / 2;
 227                 break;
 228         case 7:
 229                 sysInfo->freqFMan[1] = freqCC_PLL[3] / 3;
 230                 break;
 231         default:
 232                 printf("Error: Unknown FMan2 clock select!\n");
 233         case 0:
 234                 sysInfo->freqFMan[1] = sysInfo->freqSystemBus / 2;
 235                 break;
 236         }
 237 #endif  /* CONFIG_SYS_NUM_FMAN == 2 */
 238 #endif  /* CONFIG_SYS_DPAA_FMAN */
 239
 240 #else /* CONFIG_SYS_FSL_QORIQ_CHASSIS2 */
 241
 242         for_each_cpu(i, cpu, cpu_numcores(), cpu_mask()) {
 243                 u32 c_pll_sel = (in_be32(&clk->clkc0csr + cpu*8) >> 27) & 0xf;
 244                 u32 cplx_pll = core_cplx_PLL[c_pll_sel];
 245
 246                 sysInfo->freqProcessor[cpu] =
 247                          freqCC_PLL[cplx_pll] / core_cplx_PLL_div[c_pll_sel];
 248         }
 249 #define PME_CLK_SEL     0x80000000
 250 #define FM1_CLK_SEL     0x40000000
 251 #define FM2_CLK_SEL     0x20000000
 252 #define HWA_ASYNC_DIV   0x04000000
 253 #if (CONFIG_SYS_FSL_NUM_CC_PLLS == 2)
 254 #define HWA_CC_PLL      1
 255 #elif (CONFIG_SYS_FSL_NUM_CC_PLLS == 3)
 256 #define HWA_CC_PLL      2
 257 #elif (CONFIG_SYS_FSL_NUM_CC_PLLS == 4)
 258 #define HWA_CC_PLL      2
 259 #else
 260 #error CONFIG_SYS_FSL_NUM_CC_PLLS not set or unknown case
 261 #endif
 262         rcw_tmp = in_be32(&gur->rcwsr[7]);
 263
 264 #ifdef CONFIG_SYS_DPAA_PME
 265         if (rcw_tmp & PME_CLK_SEL) {
 266                 if (rcw_tmp & HWA_ASYNC_DIV)
 267                         sysInfo->freqPME = freqCC_PLL[HWA_CC_PLL] / 4;
 268                 else
 269                         sysInfo->freqPME = freqCC_PLL[HWA_CC_PLL] / 2;
 270         } else {
 271                 sysInfo->freqPME = sysInfo->freqSystemBus / 2;
 272         }
 273 #endif
 274
 275 #ifdef CONFIG_SYS_DPAA_FMAN
 276         if (rcw_tmp & FM1_CLK_SEL) {
 277                 if (rcw_tmp & HWA_ASYNC_DIV)
 278                         sysInfo->freqFMan[0] = freqCC_PLL[HWA_CC_PLL] / 4;
 279                 else
 280                         sysInfo->freqFMan[0] = freqCC_PLL[HWA_CC_PLL] / 2;
 281         } else {
 282                 sysInfo->freqFMan[0] = sysInfo->freqSystemBus / 2;
 283         }
 284 #if (CONFIG_SYS_NUM_FMAN) == 2
 285         if (rcw_tmp & FM2_CLK_SEL) {
 286                 if (rcw_tmp & HWA_ASYNC_DIV)
 287                         sysInfo->freqFMan[1] = freqCC_PLL[HWA_CC_PLL] / 4;
 288                 else
 289                         sysInfo->freqFMan[1] = freqCC_PLL[HWA_CC_PLL] / 2;
 290         } else {
 291                 sysInfo->freqFMan[1] = sysInfo->freqSystemBus / 2;
 292         }
 293 #endif
 294 #endif
 295
 296 #endif /* CONFIG_SYS_FSL_QORIQ_CHASSIS2 */
 297
 298 #else /* CONFIG_FSL_CORENET */
 299         uint plat_ratio, e500_ratio, half_freqSystemBus;
 300         int i;
 301 #ifdef CONFIG_QE
 302         __maybe_unused u32 qe_ratio;
 303 #endif
 304
 305         plat_ratio = (gur->porpllsr) & 0x0000003e;
 306         plat_ratio >>= 1;
 307         sysInfo->freqSystemBus = plat_ratio * CONFIG_SYS_CLK_FREQ;
 308
 309         /* Divide before multiply to avoid integer
 310          * overflow for processor speeds above 2GHz */
 311         half_freqSystemBus = sysInfo->freqSystemBus/2;
 312         for (i = 0; i < cpu_numcores(); i++) {
 313                 e500_ratio = ((gur->porpllsr) >> (i * 8 + 16)) & 0x3f;
 314                 sysInfo->freqProcessor[i] = e500_ratio * half_freqSystemBus;
 315         }
 316
 317         /* Note: freqDDRBus is the MCLK frequency, not the data rate. */
 318         sysInfo->freqDDRBus = sysInfo->freqSystemBus;
 319
 320 #ifdef CONFIG_DDR_CLK_FREQ
 321         {
 322                 u32 ddr_ratio = ((gur->porpllsr) & MPC85xx_PORPLLSR_DDR_RATIO)
 323                         >> MPC85xx_PORPLLSR_DDR_RATIO_SHIFT;
 324                 if (ddr_ratio != 0x7)
 325                         sysInfo->freqDDRBus = ddr_ratio * CONFIG_DDR_CLK_FREQ;
 326         }
 327 #endif
 328
 329 #ifdef CONFIG_QE
 330 #if defined(CONFIG_P1012) || defined(CONFIG_P1021) || defined(CONFIG_P1025)
 331         sysInfo->freqQE =  sysInfo->freqSystemBus;
 332 #else
 333         qe_ratio = ((gur->porpllsr) & MPC85xx_PORPLLSR_QE_RATIO)
 334                         >> MPC85xx_PORPLLSR_QE_RATIO_SHIFT;
 335         sysInfo->freqQE = qe_ratio * CONFIG_SYS_CLK_FREQ;
 336 #endif
 337 #endif
 338
 339 #ifdef CONFIG_SYS_DPAA_FMAN
 340                 sysInfo->freqFMan[0] = sysInfo->freqSystemBus;
 341 #endif
 342
 343 #endif /* CONFIG_FSL_CORENET */
 344
 345 #if defined(CONFIG_FSL_LBC)
 346         uint lcrr_div;
 347 #if defined(CONFIG_SYS_LBC_LCRR)
 348         /* We will program LCRR to this value later */
 349         lcrr_div = CONFIG_SYS_LBC_LCRR & LCRR_CLKDIV;
 350 #else
 351         lcrr_div = in_be32(&(LBC_BASE_ADDR)->lcrr) & LCRR_CLKDIV;
 352 #endif
 353         if (lcrr_div == 2 || lcrr_div == 4 || lcrr_div == 8) {
 354 #if defined(CONFIG_FSL_CORENET)
 355                 /* If this is corenet based SoC, bit-representation
 356                  * for four times the clock divider values.
 357                  */
 358                 lcrr_div *= 4;
 359 #elif !defined(CONFIG_MPC8540) && !defined(CONFIG_MPC8541) && \
 360     !defined(CONFIG_MPC8555) && !defined(CONFIG_MPC8560)
 361                 /*
 362                  * Yes, the entire PQ38 family use the same
 363                  * bit-representation for twice the clock divider values.
 364                  */
 365                 lcrr_div *= 2;
 366 #endif
 367                 sysInfo->freqLocalBus = sysInfo->freqSystemBus / lcrr_div;
 368         } else {
 369                 /* In case anyone cares what the unknown value is */
 370                 sysInfo->freqLocalBus = lcrr_div;
 371         }
 372 #endif
 373
 374 #if defined(CONFIG_FSL_IFC)
 375         ccr = in_be32(&ifc_regs->ifc_ccr);
 376         ccr = ((ccr & IFC_CCR_CLK_DIV_MASK) >> IFC_CCR_CLK_DIV_SHIFT) + 1;
 377
 378         sysInfo->freqLocalBus = sysInfo->freqSystemBus / ccr;
 379 #endif
 380 }
 381
 382
 383 int get_clocks (void)
 384 {
 385         sys_info_t sys_info;
 386 #ifdef CONFIG_MPC8544
 387         volatile ccsr_gur_t *gur = (void *) CONFIG_SYS_MPC85xx_GUTS_ADDR;
 388 #endif
 389 #if defined(CONFIG_CPM2)
 390         volatile ccsr_cpm_t *cpm = (ccsr_cpm_t *)CONFIG_SYS_MPC85xx_CPM_ADDR;
 391         uint sccr, dfbrg;
 392
 393         /* set VCO = 4 * BRG */
 394         cpm->im_cpm_intctl.sccr &= 0xfffffffc;
 395         sccr = cpm->im_cpm_intctl.sccr;
 396         dfbrg = (sccr & SCCR_DFBRG_MSK) >> SCCR_DFBRG_SHIFT;
 397 #endif
 398         get_sys_info (&sys_info);
 399         gd->cpu_clk = sys_info.freqProcessor[0];
 400         gd->bus_clk = sys_info.freqSystemBus;
 401         gd->mem_clk = sys_info.freqDDRBus;
 402         gd->arch.lbc_clk = sys_info.freqLocalBus;
 403
 404 #ifdef CONFIG_QE
 405         gd->arch.qe_clk = sys_info.freqQE;
 406         gd->arch.brg_clk = gd->arch.qe_clk / 2;
 407 #endif
 408         /*
 409          * The base clock for I2C depends on the actual SOC.  Unfortunately,
 410          * there is no pattern that can be used to determine the frequency, so
 411          * the only choice is to look up the actual SOC number and use the value
 412          * for that SOC. This information is taken from application note
 413          * AN2919.
 414          */
 415 #if defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
 416         defined(CONFIG_MPC8560) || defined(CONFIG_MPC8555)
 417         gd->arch.i2c1_clk = sys_info.freqSystemBus;
 418 #elif defined(CONFIG_MPC8544)
 419         /*
 420          * On the 8544, the I2C clock is the same as the SEC clock.  This can be
 421          * either CCB/2 or CCB/3, depending on the value of cfg_sec_freq. See
 422          * 4.4.3.3 of the 8544 RM.  Note that this might actually work for all
 423          * 85xx, but only the 8544 has cfg_sec_freq, so it's unknown if the
 424          * PORDEVSR2_SEC_CFG bit is 0 on all 85xx boards that are not an 8544.
 425          */
 426         if (gur->pordevsr2 & MPC85xx_PORDEVSR2_SEC_CFG)
 427                 gd->arch.i2c1_clk = sys_info.freqSystemBus / 3;
 428         else
 429                 gd->arch.i2c1_clk = sys_info.freqSystemBus / 2;
 430 #else
 431         /* Most 85xx SOCs use CCB/2, so this is the default behavior. */
 432         gd->arch.i2c1_clk = sys_info.freqSystemBus / 2;
 433 #endif
 434         gd->arch.i2c2_clk = gd->arch.i2c1_clk;
 435
 436 #if defined(CONFIG_FSL_ESDHC)
 437 #if defined(CONFIG_MPC8569) || defined(CONFIG_P1010) ||\
 438        defined(CONFIG_P1014)
 439         gd->arch.sdhc_clk = gd->bus_clk;
 440 #else
 441         gd->arch.sdhc_clk = gd->bus_clk / 2;
 442 #endif
 443 #endif /* defined(CONFIG_FSL_ESDHC) */
 444
 445 #if defined(CONFIG_CPM2)
 446         gd->arch.vco_out = 2*sys_info.freqSystemBus;
 447         gd->arch.cpm_clk = gd->arch.vco_out / 2;
 448         gd->arch.scc_clk = gd->arch.vco_out / 4;
 449         gd->arch.brg_clk = gd->arch.vco_out / (1 << (2 * (dfbrg + 1)));
 450 #endif
 451
 452         if(gd->cpu_clk != 0) return (0);
 453         else return (1);
 454 }
 455
 456
 457 /********************************************
 458  * get_bus_freq
 459  * return system bus freq in Hz
 460  *********************************************/
 461 ulong get_bus_freq (ulong dummy)
 462 {
 463         return gd->bus_clk;
 464 }
 465
 466 /********************************************
 467  * get_ddr_freq
 468  * return ddr bus freq in Hz
 469  *********************************************/
 470 ulong get_ddr_freq (ulong dummy)
 471 {
 472         return gd->mem_clk;
 473 }