1 /* 2 * Copyright 2004, 2007-2010 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 <asm/processor.h> 32 #include <asm/io.h> 33 34 DECLARE_GLOBAL_DATA_PTR; 35 36 /* --------------------------------------------------------------- */ 37 38 void get_sys_info (sys_info_t * sysInfo) 39 { 40 volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); 41 #ifdef CONFIG_FSL_CORENET 42 volatile ccsr_clk_t *clk = (void *)(CONFIG_SYS_FSL_CORENET_CLK_ADDR); 43 44 const u8 core_cplx_PLL[16] = { 45 [ 0] = 0, /* CC1 PPL / 1 */ 46 [ 1] = 0, /* CC1 PPL / 2 */ 47 [ 2] = 0, /* CC1 PPL / 4 */ 48 [ 4] = 1, /* CC2 PPL / 1 */ 49 [ 5] = 1, /* CC2 PPL / 2 */ 50 [ 6] = 1, /* CC2 PPL / 4 */ 51 [ 8] = 2, /* CC3 PPL / 1 */ 52 [ 9] = 2, /* CC3 PPL / 2 */ 53 [10] = 2, /* CC3 PPL / 4 */ 54 [12] = 3, /* CC4 PPL / 1 */ 55 [13] = 3, /* CC4 PPL / 2 */ 56 [14] = 3, /* CC4 PPL / 4 */ 57 }; 58 59 const u8 core_cplx_PLL_div[16] = { 60 [ 0] = 1, /* CC1 PPL / 1 */ 61 [ 1] = 2, /* CC1 PPL / 2 */ 62 [ 2] = 4, /* CC1 PPL / 4 */ 63 [ 4] = 1, /* CC2 PPL / 1 */ 64 [ 5] = 2, /* CC2 PPL / 2 */ 65 [ 6] = 4, /* CC2 PPL / 4 */ 66 [ 8] = 1, /* CC3 PPL / 1 */ 67 [ 9] = 2, /* CC3 PPL / 2 */ 68 [10] = 4, /* CC3 PPL / 4 */ 69 [12] = 1, /* CC4 PPL / 1 */ 70 [13] = 2, /* CC4 PPL / 2 */ 71 [14] = 4, /* CC4 PPL / 4 */ 72 }; 73 uint lcrr_div, i, freqCC_PLL[4], rcw_tmp; 74 uint ratio[4]; 75 unsigned long sysclk = CONFIG_SYS_CLK_FREQ; 76 uint mem_pll_rat; 77 78 sysInfo->freqSystemBus = sysclk; 79 sysInfo->freqDDRBus = sysclk; 80 81 sysInfo->freqSystemBus *= (in_be32(&gur->rcwsr[0]) >> 25) & 0x1f; 82 mem_pll_rat = (in_be32(&gur->rcwsr[0]) >> 17) & 0x1f; 83 if (mem_pll_rat > 2) 84 sysInfo->freqDDRBus *= mem_pll_rat; 85 else 86 sysInfo->freqDDRBus = sysInfo->freqSystemBus * mem_pll_rat; 87 88 ratio[0] = (in_be32(&clk->pllc1gsr) >> 1) & 0x3f; 89 ratio[1] = (in_be32(&clk->pllc2gsr) >> 1) & 0x3f; 90 ratio[2] = (in_be32(&clk->pllc3gsr) >> 1) & 0x3f; 91 ratio[3] = (in_be32(&clk->pllc4gsr) >> 1) & 0x3f; 92 for (i = 0; i < 4; i++) { 93 if (ratio[i] > 4) 94 freqCC_PLL[i] = sysclk * ratio[i]; 95 else 96 freqCC_PLL[i] = sysInfo->freqSystemBus * ratio[i]; 97 } 98 rcw_tmp = in_be32(&gur->rcwsr[3]); 99 for (i = 0; i < cpu_numcores(); i++) { 100 u32 c_pll_sel = (in_be32(&clk->clkc0csr + i*8) >> 27) & 0xf; 101 u32 cplx_pll = core_cplx_PLL[c_pll_sel]; 102 103 sysInfo->freqProcessor[i] = 104 freqCC_PLL[cplx_pll] / core_cplx_PLL_div[c_pll_sel]; 105 } 106 107 #define PME_CLK_SEL 0x80000000 108 #define FM1_CLK_SEL 0x40000000 109 #define FM2_CLK_SEL 0x20000000 110 rcw_tmp = in_be32(&gur->rcwsr[7]); 111 112 #ifdef CONFIG_SYS_DPAA_PME 113 if (rcw_tmp & PME_CLK_SEL) 114 sysInfo->freqPME = freqCC_PLL[2] / 2; 115 else 116 sysInfo->freqPME = sysInfo->freqSystemBus / 2; 117 #endif 118 119 #ifdef CONFIG_SYS_DPAA_FMAN 120 if (rcw_tmp & FM1_CLK_SEL) 121 sysInfo->freqFMan[0] = freqCC_PLL[2] / 2; 122 else 123 sysInfo->freqFMan[0] = sysInfo->freqSystemBus / 2; 124 #if (CONFIG_SYS_NUM_FMAN) == 2 125 if (rcw_tmp & FM2_CLK_SEL) 126 sysInfo->freqFMan[1] = freqCC_PLL[2] / 2; 127 else 128 sysInfo->freqFMan[1] = sysInfo->freqSystemBus / 2; 129 #endif 130 #endif 131 132 #else 133 uint plat_ratio,e500_ratio,half_freqSystemBus; 134 uint lcrr_div; 135 int i; 136 #ifdef CONFIG_QE 137 u32 qe_ratio; 138 #endif 139 140 plat_ratio = (gur->porpllsr) & 0x0000003e; 141 plat_ratio >>= 1; 142 sysInfo->freqSystemBus = plat_ratio * CONFIG_SYS_CLK_FREQ; 143 144 /* Divide before multiply to avoid integer 145 * overflow for processor speeds above 2GHz */ 146 half_freqSystemBus = sysInfo->freqSystemBus/2; 147 for (i = 0; i < cpu_numcores(); i++) { 148 e500_ratio = ((gur->porpllsr) >> (i * 8 + 16)) & 0x3f; 149 sysInfo->freqProcessor[i] = e500_ratio * half_freqSystemBus; 150 } 151 152 /* Note: freqDDRBus is the MCLK frequency, not the data rate. */ 153 sysInfo->freqDDRBus = sysInfo->freqSystemBus; 154 155 #ifdef CONFIG_DDR_CLK_FREQ 156 { 157 u32 ddr_ratio = ((gur->porpllsr) & MPC85xx_PORPLLSR_DDR_RATIO) 158 >> MPC85xx_PORPLLSR_DDR_RATIO_SHIFT; 159 if (ddr_ratio != 0x7) 160 sysInfo->freqDDRBus = ddr_ratio * CONFIG_DDR_CLK_FREQ; 161 } 162 #endif 163 #endif 164 165 #ifdef CONFIG_QE 166 qe_ratio = ((gur->porpllsr) & MPC85xx_PORPLLSR_QE_RATIO) 167 >> MPC85xx_PORPLLSR_QE_RATIO_SHIFT; 168 sysInfo->freqQE = qe_ratio * CONFIG_SYS_CLK_FREQ; 169 #endif 170 171 #if defined(CONFIG_SYS_LBC_LCRR) 172 /* We will program LCRR to this value later */ 173 lcrr_div = CONFIG_SYS_LBC_LCRR & LCRR_CLKDIV; 174 #else 175 { 176 volatile ccsr_lbc_t *lbc = (void *)(CONFIG_SYS_MPC85xx_LBC_ADDR); 177 lcrr_div = in_be32(&lbc->lcrr) & LCRR_CLKDIV; 178 } 179 #endif 180 if (lcrr_div == 2 || lcrr_div == 4 || lcrr_div == 8) { 181 #if defined(CONFIG_FSL_CORENET) 182 /* If this is corenet based SoC, bit-representation 183 * for four times the clock divider values. 184 */ 185 lcrr_div *= 4; 186 #elif !defined(CONFIG_MPC8540) && !defined(CONFIG_MPC8541) && \ 187 !defined(CONFIG_MPC8555) && !defined(CONFIG_MPC8560) 188 /* 189 * Yes, the entire PQ38 family use the same 190 * bit-representation for twice the clock divider values. 191 */ 192 lcrr_div *= 2; 193 #endif 194 sysInfo->freqLocalBus = sysInfo->freqSystemBus / lcrr_div; 195 } else { 196 /* In case anyone cares what the unknown value is */ 197 sysInfo->freqLocalBus = lcrr_div; 198 } 199 } 200 201 202 int get_clocks (void) 203 { 204 sys_info_t sys_info; 205 #ifdef CONFIG_MPC8544 206 volatile ccsr_gur_t *gur = (void *) CONFIG_SYS_MPC85xx_GUTS_ADDR; 207 #endif 208 #if defined(CONFIG_CPM2) 209 volatile ccsr_cpm_t *cpm = (ccsr_cpm_t *)CONFIG_SYS_MPC85xx_CPM_ADDR; 210 uint sccr, dfbrg; 211 212 /* set VCO = 4 * BRG */ 213 cpm->im_cpm_intctl.sccr &= 0xfffffffc; 214 sccr = cpm->im_cpm_intctl.sccr; 215 dfbrg = (sccr & SCCR_DFBRG_MSK) >> SCCR_DFBRG_SHIFT; 216 #endif 217 get_sys_info (&sys_info); 218 gd->cpu_clk = sys_info.freqProcessor[0]; 219 gd->bus_clk = sys_info.freqSystemBus; 220 gd->mem_clk = sys_info.freqDDRBus; 221 gd->lbc_clk = sys_info.freqLocalBus; 222 223 #ifdef CONFIG_QE 224 gd->qe_clk = sys_info.freqQE; 225 gd->brg_clk = gd->qe_clk / 2; 226 #endif 227 /* 228 * The base clock for I2C depends on the actual SOC. Unfortunately, 229 * there is no pattern that can be used to determine the frequency, so 230 * the only choice is to look up the actual SOC number and use the value 231 * for that SOC. This information is taken from application note 232 * AN2919. 233 */ 234 #if defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \ 235 defined(CONFIG_MPC8560) || defined(CONFIG_MPC8555) 236 gd->i2c1_clk = sys_info.freqSystemBus; 237 #elif defined(CONFIG_MPC8544) 238 /* 239 * On the 8544, the I2C clock is the same as the SEC clock. This can be 240 * either CCB/2 or CCB/3, depending on the value of cfg_sec_freq. See 241 * 4.4.3.3 of the 8544 RM. Note that this might actually work for all 242 * 85xx, but only the 8544 has cfg_sec_freq, so it's unknown if the 243 * PORDEVSR2_SEC_CFG bit is 0 on all 85xx boards that are not an 8544. 244 */ 245 if (gur->pordevsr2 & MPC85xx_PORDEVSR2_SEC_CFG) 246 gd->i2c1_clk = sys_info.freqSystemBus / 3; 247 else 248 gd->i2c1_clk = sys_info.freqSystemBus / 2; 249 #else 250 /* Most 85xx SOCs use CCB/2, so this is the default behavior. */ 251 gd->i2c1_clk = sys_info.freqSystemBus / 2; 252 #endif 253 gd->i2c2_clk = gd->i2c1_clk; 254 255 #if defined(CONFIG_FSL_ESDHC) 256 #ifdef CONFIG_MPC8569 257 gd->sdhc_clk = gd->bus_clk; 258 #else 259 gd->sdhc_clk = gd->bus_clk / 2; 260 #endif 261 #endif /* defined(CONFIG_FSL_ESDHC) */ 262 263 #if defined(CONFIG_CPM2) 264 gd->vco_out = 2*sys_info.freqSystemBus; 265 gd->cpm_clk = gd->vco_out / 2; 266 gd->scc_clk = gd->vco_out / 4; 267 gd->brg_clk = gd->vco_out / (1 << (2 * (dfbrg + 1))); 268 #endif 269 270 if(gd->cpu_clk != 0) return (0); 271 else return (1); 272 } 273 274 275 /******************************************** 276 * get_bus_freq 277 * return system bus freq in Hz 278 *********************************************/ 279 ulong get_bus_freq (ulong dummy) 280 { 281 return gd->bus_clk; 282 } 283 284 /******************************************** 285 * get_ddr_freq 286 * return ddr bus freq in Hz 287 *********************************************/ 288 ulong get_ddr_freq (ulong dummy) 289 { 290 return gd->mem_clk; 291 } 292