1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2014-2015, Freescale Semiconductor, Inc. 4 * 5 * Derived from arch/power/cpu/mpc85xx/speed.c 6 */ 7 8 #include <common.h> 9 #include <linux/compiler.h> 10 #include <fsl_ifc.h> 11 #include <asm/processor.h> 12 #include <asm/io.h> 13 #include <asm/arch-fsl-layerscape/immap_lsch3.h> 14 #include <asm/arch/clock.h> 15 #include <asm/arch/soc.h> 16 #include "cpu.h" 17 18 DECLARE_GLOBAL_DATA_PTR; 19 20 #ifndef CONFIG_SYS_FSL_NUM_CC_PLLS 21 #define CONFIG_SYS_FSL_NUM_CC_PLLS 6 22 #endif 23 24 25 void get_sys_info(struct sys_info *sys_info) 26 { 27 struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR); 28 struct ccsr_clk_cluster_group __iomem *clk_grp[2] = { 29 (void *)(CONFIG_SYS_FSL_CH3_CLK_GRPA_ADDR), 30 (void *)(CONFIG_SYS_FSL_CH3_CLK_GRPB_ADDR) 31 }; 32 struct ccsr_clk_ctrl __iomem *clk_ctrl = 33 (void *)(CONFIG_SYS_FSL_CH3_CLK_CTRL_ADDR); 34 unsigned int cpu; 35 const u8 core_cplx_pll[16] = { 36 [0] = 0, /* CC1 PPL / 1 */ 37 [1] = 0, /* CC1 PPL / 2 */ 38 [2] = 0, /* CC1 PPL / 4 */ 39 [4] = 1, /* CC2 PPL / 1 */ 40 [5] = 1, /* CC2 PPL / 2 */ 41 [6] = 1, /* CC2 PPL / 4 */ 42 [8] = 2, /* CC3 PPL / 1 */ 43 [9] = 2, /* CC3 PPL / 2 */ 44 [10] = 2, /* CC3 PPL / 4 */ 45 [12] = 3, /* CC4 PPL / 1 */ 46 [13] = 3, /* CC4 PPL / 2 */ 47 [14] = 3, /* CC4 PPL / 4 */ 48 }; 49 50 const u8 core_cplx_pll_div[16] = { 51 [0] = 1, /* CC1 PPL / 1 */ 52 [1] = 2, /* CC1 PPL / 2 */ 53 [2] = 4, /* CC1 PPL / 4 */ 54 [4] = 1, /* CC2 PPL / 1 */ 55 [5] = 2, /* CC2 PPL / 2 */ 56 [6] = 4, /* CC2 PPL / 4 */ 57 [8] = 1, /* CC3 PPL / 1 */ 58 [9] = 2, /* CC3 PPL / 2 */ 59 [10] = 4, /* CC3 PPL / 4 */ 60 [12] = 1, /* CC4 PPL / 1 */ 61 [13] = 2, /* CC4 PPL / 2 */ 62 [14] = 4, /* CC4 PPL / 4 */ 63 }; 64 65 uint i, cluster; 66 uint freq_c_pll[CONFIG_SYS_FSL_NUM_CC_PLLS]; 67 uint ratio[CONFIG_SYS_FSL_NUM_CC_PLLS]; 68 unsigned long sysclk = CONFIG_SYS_CLK_FREQ; 69 int cc_group[12] = CONFIG_SYS_FSL_CLUSTER_CLOCKS; 70 u32 c_pll_sel, cplx_pll; 71 void *offset; 72 73 sys_info->freq_systembus = sysclk; 74 #ifdef CONFIG_DDR_CLK_FREQ 75 sys_info->freq_ddrbus = CONFIG_DDR_CLK_FREQ; 76 #ifdef CONFIG_SYS_FSL_HAS_DP_DDR 77 sys_info->freq_ddrbus2 = CONFIG_DDR_CLK_FREQ; 78 #endif 79 #else 80 sys_info->freq_ddrbus = sysclk; 81 #ifdef CONFIG_SYS_FSL_HAS_DP_DDR 82 sys_info->freq_ddrbus2 = sysclk; 83 #endif 84 #endif 85 86 /* The freq_systembus is used to record frequency of platform PLL */ 87 sys_info->freq_systembus *= (gur_in32(&gur->rcwsr[0]) >> 88 FSL_CHASSIS3_RCWSR0_SYS_PLL_RAT_SHIFT) & 89 FSL_CHASSIS3_RCWSR0_SYS_PLL_RAT_MASK; 90 sys_info->freq_ddrbus *= (gur_in32(&gur->rcwsr[0]) >> 91 FSL_CHASSIS3_RCWSR0_MEM_PLL_RAT_SHIFT) & 92 FSL_CHASSIS3_RCWSR0_MEM_PLL_RAT_MASK; 93 #ifdef CONFIG_SYS_FSL_HAS_DP_DDR 94 if (soc_has_dp_ddr()) { 95 sys_info->freq_ddrbus2 *= (gur_in32(&gur->rcwsr[0]) >> 96 FSL_CHASSIS3_RCWSR0_MEM2_PLL_RAT_SHIFT) & 97 FSL_CHASSIS3_RCWSR0_MEM2_PLL_RAT_MASK; 98 } else { 99 sys_info->freq_ddrbus2 = 0; 100 } 101 #endif 102 103 for (i = 0; i < CONFIG_SYS_FSL_NUM_CC_PLLS; i++) { 104 /* 105 * fixme: prefer to combine the following into one line, but 106 * cannot pass compiling without warning about in_le32. 107 */ 108 offset = (void *)((size_t)clk_grp[i/3] + 109 offsetof(struct ccsr_clk_cluster_group, 110 pllngsr[i%3].gsr)); 111 ratio[i] = (in_le32(offset) >> 1) & 0x3f; 112 freq_c_pll[i] = sysclk * ratio[i]; 113 } 114 115 for_each_cpu(i, cpu, cpu_numcores(), cpu_mask()) { 116 cluster = fsl_qoriq_core_to_cluster(cpu); 117 c_pll_sel = (in_le32(&clk_ctrl->clkcncsr[cluster].csr) >> 27) 118 & 0xf; 119 cplx_pll = core_cplx_pll[c_pll_sel]; 120 cplx_pll += cc_group[cluster] - 1; 121 sys_info->freq_processor[cpu] = 122 freq_c_pll[cplx_pll] / core_cplx_pll_div[c_pll_sel]; 123 } 124 125 #if defined(CONFIG_FSL_IFC) 126 sys_info->freq_localbus = sys_info->freq_systembus / 127 CONFIG_SYS_FSL_IFC_CLK_DIV; 128 #endif 129 } 130 131 132 int get_clocks(void) 133 { 134 struct sys_info sys_info; 135 get_sys_info(&sys_info); 136 gd->cpu_clk = sys_info.freq_processor[0]; 137 gd->bus_clk = sys_info.freq_systembus / CONFIG_SYS_FSL_PCLK_DIV; 138 gd->mem_clk = sys_info.freq_ddrbus; 139 #ifdef CONFIG_SYS_FSL_HAS_DP_DDR 140 gd->arch.mem2_clk = sys_info.freq_ddrbus2; 141 #endif 142 #if defined(CONFIG_FSL_ESDHC) 143 gd->arch.sdhc_clk = gd->bus_clk / CONFIG_SYS_FSL_SDHC_CLK_DIV; 144 #endif /* defined(CONFIG_FSL_ESDHC) */ 145 146 if (gd->cpu_clk != 0) 147 return 0; 148 else 149 return 1; 150 } 151 152 /******************************************** 153 * get_bus_freq 154 * return platform clock in Hz 155 *********************************************/ 156 ulong get_bus_freq(ulong dummy) 157 { 158 if (!gd->bus_clk) 159 get_clocks(); 160 161 return gd->bus_clk; 162 } 163 164 /******************************************** 165 * get_ddr_freq 166 * return ddr bus freq in Hz 167 *********************************************/ 168 ulong get_ddr_freq(ulong ctrl_num) 169 { 170 if (!gd->mem_clk) 171 get_clocks(); 172 173 /* 174 * DDR controller 0 & 1 are on memory complex 0 175 * DDR controller 2 is on memory complext 1 176 */ 177 #ifdef CONFIG_SYS_FSL_HAS_DP_DDR 178 if (ctrl_num >= 2) 179 return gd->arch.mem2_clk; 180 #endif 181 182 return gd->mem_clk; 183 } 184 185 int get_i2c_freq(ulong dummy) 186 { 187 return get_bus_freq(0) / CONFIG_SYS_FSL_I2C_CLK_DIV; 188 } 189 190 int get_dspi_freq(ulong dummy) 191 { 192 return get_bus_freq(0) / CONFIG_SYS_FSL_DSPI_CLK_DIV; 193 } 194 195 #ifdef CONFIG_FSL_ESDHC 196 int get_sdhc_freq(ulong dummy) 197 { 198 if (!gd->arch.sdhc_clk) 199 get_clocks(); 200 201 return gd->arch.sdhc_clk; 202 } 203 #endif 204 205 int get_serial_clock(void) 206 { 207 return get_bus_freq(0) / CONFIG_SYS_FSL_DUART_CLK_DIV; 208 } 209 210 unsigned int mxc_get_clock(enum mxc_clock clk) 211 { 212 switch (clk) { 213 case MXC_I2C_CLK: 214 return get_i2c_freq(0); 215 #if defined(CONFIG_FSL_ESDHC) 216 case MXC_ESDHC_CLK: 217 return get_sdhc_freq(0); 218 #endif 219 case MXC_DSPI_CLK: 220 return get_dspi_freq(0); 221 default: 222 printf("Unsupported clock\n"); 223 } 224 return 0; 225 } 226