LXR uboot/arch/arm/cpu/armv7/ls102xa/clock.c

   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
  13DECLARE_GLOBAL_DATA_PTR;
  14
  15#ifndef CONFIG_SYS_FSL_NUM_CC_PLLS
  16#define CONFIG_SYS_FSL_NUM_CC_PLLS      2
  17#endif
  18
  19void 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
  84int 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
 100ulong get_bus_freq(ulong dummy)
 101{
 102        return gd->bus_clk;
 103}
 104
 105ulong get_ddr_freq(ulong dummy)
 106{
 107        return gd->mem_clk;
 108}
 109
 110int get_serial_clock(void)
 111{
 112        return gd->bus_clk / 2;
 113}
 114
 115unsigned 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