1 /* 2 * Copyright 2014 Freescale Semiconductor, Inc. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <asm/io.h> 9 #include <asm/arch/immap_ls102xa.h> 10 #include <asm/arch/clock.h> 11 #include <fsl_ifc.h> 12 13 DECLARE_GLOBAL_DATA_PTR; 14 15 #ifndef CONFIG_SYS_FSL_NUM_CC_PLLS 16 #define CONFIG_SYS_FSL_NUM_CC_PLLS 2 17 #endif 18 19 void get_sys_info(struct sys_info *sys_info) 20 { 21 struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR); 22 #ifdef CONFIG_FSL_IFC 23 struct fsl_ifc *ifc_regs = (void *)CONFIG_SYS_IFC_ADDR; 24 u32 ccr; 25 #endif 26 struct ccsr_clk *clk = (void *)(CONFIG_SYS_FSL_LS1_CLK_ADDR); 27 unsigned int cpu; 28 const u8 core_cplx_pll[6] = { 29 [0] = 0, /* CC1 PPL / 1 */ 30 [1] = 0, /* CC1 PPL / 2 */ 31 [4] = 1, /* CC2 PPL / 1 */ 32 [5] = 1, /* CC2 PPL / 2 */ 33 }; 34 35 const u8 core_cplx_pll_div[6] = { 36 [0] = 1, /* CC1 PPL / 1 */ 37 [1] = 2, /* CC1 PPL / 2 */ 38 [4] = 1, /* CC2 PPL / 1 */ 39 [5] = 2, /* CC2 PPL / 2 */ 40 }; 41 42 uint i; 43 uint freq_c_pll[CONFIG_SYS_FSL_NUM_CC_PLLS]; 44 uint ratio[CONFIG_SYS_FSL_NUM_CC_PLLS]; 45 unsigned long sysclk = CONFIG_SYS_CLK_FREQ; 46 47 sys_info->freq_systembus = sysclk; 48 #ifdef CONFIG_DDR_CLK_FREQ 49 sys_info->freq_ddrbus = CONFIG_DDR_CLK_FREQ; 50 #else 51 sys_info->freq_ddrbus = sysclk; 52 #endif 53 54 sys_info->freq_systembus *= (in_be32(&gur->rcwsr[0]) >> 55 RCWSR0_SYS_PLL_RAT_SHIFT) & RCWSR0_SYS_PLL_RAT_MASK; 56 sys_info->freq_ddrbus *= (in_be32(&gur->rcwsr[0]) >> 57 RCWSR0_MEM_PLL_RAT_SHIFT) & RCWSR0_MEM_PLL_RAT_MASK; 58 59 for (i = 0; i < CONFIG_SYS_FSL_NUM_CC_PLLS; i++) { 60 ratio[i] = (in_be32(&clk->pllcgsr[i].pllcngsr) >> 1) & 0x3f; 61 if (ratio[i] > 4) 62 freq_c_pll[i] = sysclk * ratio[i]; 63 else 64 freq_c_pll[i] = sys_info->freq_systembus * ratio[i]; 65 } 66 67 for (cpu = 0; cpu < CONFIG_MAX_CPUS; cpu++) { 68 u32 c_pll_sel = (in_be32(&clk->clkcsr[cpu].clkcncsr) >> 27) 69 & 0xf; 70 u32 cplx_pll = core_cplx_pll[c_pll_sel]; 71 72 sys_info->freq_processor[cpu] = 73 freq_c_pll[cplx_pll] / core_cplx_pll_div[c_pll_sel]; 74 } 75 76 #if defined(CONFIG_FSL_IFC) 77 ccr = in_be32(&ifc_regs->ifc_ccr); 78 ccr = ((ccr & IFC_CCR_CLK_DIV_MASK) >> IFC_CCR_CLK_DIV_SHIFT) + 1; 79 80 sys_info->freq_localbus = sys_info->freq_systembus / ccr; 81 #endif 82 } 83 84 int get_clocks(void) 85 { 86 struct sys_info sys_info; 87 88 get_sys_info(&sys_info); 89 gd->cpu_clk = sys_info.freq_processor[0]; 90 gd->bus_clk = sys_info.freq_systembus; 91 gd->mem_clk = sys_info.freq_ddrbus * 2; 92 93 #if defined(CONFIG_FSL_ESDHC) 94 gd->arch.sdhc_clk = gd->bus_clk; 95 #endif 96 97 return 0; 98 } 99 100 ulong get_bus_freq(ulong dummy) 101 { 102 return gd->bus_clk; 103 } 104 105 ulong get_ddr_freq(ulong dummy) 106 { 107 return gd->mem_clk; 108 } 109 110 int get_serial_clock(void) 111 { 112 return gd->bus_clk / 2; 113 } 114 115 unsigned int mxc_get_clock(enum mxc_clock clk) 116 { 117 switch (clk) { 118 case MXC_I2C_CLK: 119 return get_bus_freq(0) / 2; 120 case MXC_ESDHC_CLK: 121 return get_bus_freq(0); 122 case MXC_DSPI_CLK: 123 return get_bus_freq(0) / 2; 124 case MXC_UART_CLK: 125 return get_bus_freq(0) / 2; 126 default: 127 printf("Unsupported clock\n"); 128 } 129 return 0; 130 } 131