git.sur5r.net Git - u-boot/blob - arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_speed.c

   1 /*
   2  * Copyright 2015 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <linux/compiler.h>
   9 #include <asm/io.h>
  10 #include <asm/processor.h>
  11 #include <asm/arch/clock.h>
  12 #include <asm/arch/soc.h>
  13 #include <fsl_ifc.h>
  14 #include "cpu.h"
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 #ifndef CONFIG_SYS_FSL_NUM_CC_PLLS
  19 #define CONFIG_SYS_FSL_NUM_CC_PLLS      2
  20 #endif
  21
  22 void get_sys_info(struct sys_info *sys_info)
  23 {
  24         struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
  25 #if (defined(CONFIG_FSL_ESDHC) &&\
  26         defined(CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK)) ||\
  27         defined(CONFIG_SYS_DPAA_FMAN)
  28
  29         u32 rcw_tmp;
  30 #endif
  31         struct ccsr_clk *clk = (void *)(CONFIG_SYS_FSL_CLK_ADDR);
  32         unsigned int cpu;
  33         const u8 core_cplx_pll[8] = {
  34                 [0] = 0,        /* CC1 PPL / 1 */
  35                 [1] = 0,        /* CC1 PPL / 2 */
  36                 [4] = 1,        /* CC2 PPL / 1 */
  37                 [5] = 1,        /* CC2 PPL / 2 */
  38         };
  39
  40         const u8 core_cplx_pll_div[8] = {
  41                 [0] = 1,        /* CC1 PPL / 1 */
  42                 [1] = 2,        /* CC1 PPL / 2 */
  43                 [4] = 1,        /* CC2 PPL / 1 */
  44                 [5] = 2,        /* CC2 PPL / 2 */
  45         };
  46
  47         uint i, cluster;
  48         uint freq_c_pll[CONFIG_SYS_FSL_NUM_CC_PLLS];
  49         uint ratio[CONFIG_SYS_FSL_NUM_CC_PLLS];
  50         unsigned long sysclk = CONFIG_SYS_CLK_FREQ;
  51         unsigned long cluster_clk;
  52
  53         sys_info->freq_systembus = sysclk;
  54 #ifndef CONFIG_CLUSTER_CLK_FREQ
  55 #define CONFIG_CLUSTER_CLK_FREQ CONFIG_SYS_CLK_FREQ
  56 #endif
  57         cluster_clk = CONFIG_CLUSTER_CLK_FREQ;
  58
  59 #ifdef CONFIG_DDR_CLK_FREQ
  60         sys_info->freq_ddrbus = CONFIG_DDR_CLK_FREQ;
  61 #else
  62         sys_info->freq_ddrbus = sysclk;
  63 #endif
  64
  65         /* The freq_systembus is used to record frequency of platform PLL */
  66         sys_info->freq_systembus *= (gur_in32(&gur->rcwsr[0]) >>
  67                         FSL_CHASSIS2_RCWSR0_SYS_PLL_RAT_SHIFT) &
  68                         FSL_CHASSIS2_RCWSR0_SYS_PLL_RAT_MASK;
  69
  70 #ifdef CONFIG_ARCH_LS1012A
  71         sys_info->freq_ddrbus = 2 * sys_info->freq_systembus;
  72 #else
  73         sys_info->freq_ddrbus *= (gur_in32(&gur->rcwsr[0]) >>
  74                         FSL_CHASSIS2_RCWSR0_MEM_PLL_RAT_SHIFT) &
  75                         FSL_CHASSIS2_RCWSR0_MEM_PLL_RAT_MASK;
  76 #endif
  77
  78         for (i = 0; i < CONFIG_SYS_FSL_NUM_CC_PLLS; i++) {
  79                 ratio[i] = (in_be32(&clk->pllcgsr[i].pllcngsr) >> 1) & 0xff;
  80                 if (ratio[i] > 4)
  81                         freq_c_pll[i] = cluster_clk * ratio[i];
  82                 else
  83                         freq_c_pll[i] = sys_info->freq_systembus * ratio[i];
  84         }
  85
  86         for_each_cpu(i, cpu, cpu_numcores(), cpu_mask()) {
  87                 cluster = fsl_qoriq_core_to_cluster(cpu);
  88                 u32 c_pll_sel = (in_be32(&clk->clkcsr[cluster].clkcncsr) >> 27)
  89                                 & 0xf;
  90                 u32 cplx_pll = core_cplx_pll[c_pll_sel];
  91
  92                 sys_info->freq_processor[cpu] =
  93                         freq_c_pll[cplx_pll] / core_cplx_pll_div[c_pll_sel];
  94         }
  95
  96 #define HWA_CGA_M1_CLK_SEL      0xe0000000
  97 #define HWA_CGA_M1_CLK_SHIFT    29
  98 #ifdef CONFIG_SYS_DPAA_FMAN
  99         rcw_tmp = in_be32(&gur->rcwsr[7]);
 100         switch ((rcw_tmp & HWA_CGA_M1_CLK_SEL) >> HWA_CGA_M1_CLK_SHIFT) {
 101         case 2:
 102                 sys_info->freq_fman[0] = freq_c_pll[0] / 2;
 103                 break;
 104         case 3:
 105                 sys_info->freq_fman[0] = freq_c_pll[0] / 3;
 106                 break;
 107         case 4:
 108                 sys_info->freq_fman[0] = freq_c_pll[0] / 4;
 109                 break;
 110         case 5:
 111                 sys_info->freq_fman[0] = sys_info->freq_systembus;
 112                 break;
 113         case 6:
 114                 sys_info->freq_fman[0] = freq_c_pll[1] / 2;
 115                 break;
 116         case 7:
 117                 sys_info->freq_fman[0] = freq_c_pll[1] / 3;
 118                 break;
 119         default:
 120                 printf("Error: Unknown FMan1 clock select!\n");
 121                 break;
 122         }
 123 #endif
 124
 125 #define HWA_CGA_M2_CLK_SEL      0x00000007
 126 #define HWA_CGA_M2_CLK_SHIFT    0
 127 #ifdef CONFIG_FSL_ESDHC
 128 #ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
 129         rcw_tmp = in_be32(&gur->rcwsr[15]);
 130         switch ((rcw_tmp & HWA_CGA_M2_CLK_SEL) >> HWA_CGA_M2_CLK_SHIFT) {
 131         case 1:
 132                 sys_info->freq_sdhc = freq_c_pll[1];
 133                 break;
 134         case 2:
 135                 sys_info->freq_sdhc = freq_c_pll[1] / 2;
 136                 break;
 137         case 3:
 138                 sys_info->freq_sdhc = freq_c_pll[1] / 3;
 139                 break;
 140         case 6:
 141                 sys_info->freq_sdhc = freq_c_pll[0] / 2;
 142                 break;
 143         default:
 144                 printf("Error: Unknown ESDHC clock select!\n");
 145                 break;
 146         }
 147 #else
 148         sys_info->freq_sdhc = (sys_info->freq_systembus /
 149                                 CONFIG_SYS_FSL_PCLK_DIV) /
 150                                 CONFIG_SYS_FSL_SDHC_CLK_DIV;
 151 #endif
 152 #endif
 153
 154 #if defined(CONFIG_FSL_IFC)
 155         sys_info->freq_localbus = sys_info->freq_systembus /
 156                                                 CONFIG_SYS_FSL_IFC_CLK_DIV;
 157 #endif
 158 }
 159
 160 int get_clocks(void)
 161 {
 162         struct sys_info sys_info;
 163
 164         get_sys_info(&sys_info);
 165         gd->cpu_clk = sys_info.freq_processor[0];
 166         gd->bus_clk = sys_info.freq_systembus / CONFIG_SYS_FSL_PCLK_DIV;
 167         gd->mem_clk = sys_info.freq_ddrbus;
 168
 169 #ifdef CONFIG_FSL_ESDHC
 170         gd->arch.sdhc_clk = sys_info.freq_sdhc;
 171 #endif
 172
 173         if (gd->cpu_clk != 0)
 174                 return 0;
 175         else
 176                 return 1;
 177 }
 178
 179 /********************************************
 180  * get_bus_freq
 181  * return platform clock in Hz
 182  *********************************************/
 183 ulong get_bus_freq(ulong dummy)
 184 {
 185         if (!gd->bus_clk)
 186                 get_clocks();
 187
 188         return gd->bus_clk;
 189 }
 190
 191 ulong get_ddr_freq(ulong dummy)
 192 {
 193         if (!gd->mem_clk)
 194                 get_clocks();
 195
 196         return gd->mem_clk;
 197 }
 198
 199 #ifdef CONFIG_FSL_ESDHC
 200 int get_sdhc_freq(ulong dummy)
 201 {
 202         if (!gd->arch.sdhc_clk)
 203                 get_clocks();
 204
 205         return gd->arch.sdhc_clk;
 206 }
 207 #endif
 208
 209 int get_serial_clock(void)
 210 {
 211         return get_bus_freq(0) / CONFIG_SYS_FSL_DUART_CLK_DIV;
 212 }
 213
 214 int get_i2c_freq(ulong dummy)
 215 {
 216         return get_bus_freq(0) / CONFIG_SYS_FSL_I2C_CLK_DIV;
 217 }
 218
 219 int get_dspi_freq(ulong dummy)
 220 {
 221         return get_bus_freq(0) / CONFIG_SYS_FSL_DSPI_CLK_DIV;
 222 }
 223
 224 #ifdef CONFIG_FSL_LPUART
 225 int get_uart_freq(ulong dummy)
 226 {
 227         return get_bus_freq(0) / CONFIG_SYS_FSL_LPUART_CLK_DIV;
 228 }
 229 #endif
 230
 231 unsigned int mxc_get_clock(enum mxc_clock clk)
 232 {
 233         switch (clk) {
 234         case MXC_I2C_CLK:
 235                 return get_i2c_freq(0);
 236 #if defined(CONFIG_FSL_ESDHC)
 237         case MXC_ESDHC_CLK:
 238                 return get_sdhc_freq(0);
 239 #endif
 240         case MXC_DSPI_CLK:
 241                 return get_dspi_freq(0);
 242 #ifdef CONFIG_FSL_LPUART
 243         case MXC_UART_CLK:
 244                 return get_uart_freq(0);
 245 #endif
 246         default:
 247                 printf("Unsupported clock\n");
 248         }
 249         return 0;
 250 }