diff options
Diffstat (limited to 'arch/arm/cpu/armv8/fsl-lsch3/speed.c')
| -rw-r--r-- | arch/arm/cpu/armv8/fsl-lsch3/speed.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/fsl-lsch3/speed.c b/arch/arm/cpu/armv8/fsl-lsch3/speed.c new file mode 100644 index 0000000000..dc4a34bce5 --- /dev/null +++ b/arch/arm/cpu/armv8/fsl-lsch3/speed.c @@ -0,0 +1,176 @@ +/* + * Copyright 2014, Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + * + * Derived from arch/power/cpu/mpc85xx/speed.c + */ + +#include <common.h> +#include <linux/compiler.h> +#include <fsl_ifc.h> +#include <asm/processor.h> +#include <asm/io.h> +#include <asm/arch-fsl-lsch3/immap_lsch3.h> +#include <asm/arch/clock.h> +#include "cpu.h" + +DECLARE_GLOBAL_DATA_PTR; + +#ifndef CONFIG_SYS_FSL_NUM_CC_PLLS +#define CONFIG_SYS_FSL_NUM_CC_PLLS 6 +#endif + + +void get_sys_info(struct sys_info *sys_info) +{ + struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR); +#ifdef CONFIG_FSL_IFC + struct fsl_ifc *ifc_regs = (void *)CONFIG_SYS_IFC_ADDR; + u32 ccr; +#endif + struct ccsr_clk_cluster_group __iomem *clk_grp[2] = { + (void *)(CONFIG_SYS_FSL_CH3_CLK_GRPA_ADDR), + (void *)(CONFIG_SYS_FSL_CH3_CLK_GRPB_ADDR) + }; + struct ccsr_clk_ctrl __iomem *clk_ctrl = + (void *)(CONFIG_SYS_FSL_CH3_CLK_CTRL_ADDR); + unsigned int cpu; + const u8 core_cplx_pll[16] = { + [0] = 0, /* CC1 PPL / 1 */ + [1] = 0, /* CC1 PPL / 2 */ + [2] = 0, /* CC1 PPL / 4 */ + [4] = 1, /* CC2 PPL / 1 */ + [5] = 1, /* CC2 PPL / 2 */ + [6] = 1, /* CC2 PPL / 4 */ + [8] = 2, /* CC3 PPL / 1 */ + [9] = 2, /* CC3 PPL / 2 */ + [10] = 2, /* CC3 PPL / 4 */ + [12] = 3, /* CC4 PPL / 1 */ + [13] = 3, /* CC4 PPL / 2 */ + [14] = 3, /* CC4 PPL / 4 */ + }; + + const u8 core_cplx_pll_div[16] = { + [0] = 1, /* CC1 PPL / 1 */ + [1] = 2, /* CC1 PPL / 2 */ + [2] = 4, /* CC1 PPL / 4 */ + [4] = 1, /* CC2 PPL / 1 */ + [5] = 2, /* CC2 PPL / 2 */ + [6] = 4, /* CC2 PPL / 4 */ + [8] = 1, /* CC3 PPL / 1 */ + [9] = 2, /* CC3 PPL / 2 */ + [10] = 4, /* CC3 PPL / 4 */ + [12] = 1, /* CC4 PPL / 1 */ + [13] = 2, /* CC4 PPL / 2 */ + [14] = 4, /* CC4 PPL / 4 */ + }; + + uint i, cluster; + uint freq_c_pll[CONFIG_SYS_FSL_NUM_CC_PLLS]; + uint ratio[CONFIG_SYS_FSL_NUM_CC_PLLS]; + unsigned long sysclk = CONFIG_SYS_CLK_FREQ; + int cc_group[12] = CONFIG_SYS_FSL_CLUSTER_CLOCKS; + u32 c_pll_sel, cplx_pll; + void *offset; + + sys_info->freq_systembus = sysclk; +#ifdef CONFIG_DDR_CLK_FREQ + sys_info->freq_ddrbus = CONFIG_DDR_CLK_FREQ; +#else + sys_info->freq_ddrbus = sysclk; +#endif + + sys_info->freq_systembus *= (in_le32(&gur->rcwsr[0]) >> + FSL_CHASSIS3_RCWSR0_SYS_PLL_RAT_SHIFT) & + FSL_CHASSIS3_RCWSR0_SYS_PLL_RAT_MASK; + sys_info->freq_ddrbus *= (in_le32(&gur->rcwsr[0]) >> + FSL_CHASSIS3_RCWSR0_MEM_PLL_RAT_SHIFT) & + FSL_CHASSIS3_RCWSR0_MEM_PLL_RAT_MASK; + + for (i = 0; i < CONFIG_SYS_FSL_NUM_CC_PLLS; i++) { + /* + * fixme: prefer to combine the following into one line, but + * cannot pass compiling without warning about in_le32. + */ + offset = (void *)((size_t)clk_grp[i/3] + + offsetof(struct ccsr_clk_cluster_group, + pllngsr[i%3].gsr)); + ratio[i] = (in_le32(offset) >> 1) & 0x3f; + if (ratio[i] > 4) + freq_c_pll[i] = sysclk * ratio[i]; + else + freq_c_pll[i] = sys_info->freq_systembus * ratio[i]; + } + + for_each_cpu(i, cpu, cpu_numcores(), cpu_mask()) { + cluster = fsl_qoriq_core_to_cluster(cpu); + c_pll_sel = (in_le32(&clk_ctrl->clkcncsr[cluster].csr) >> 27) + & 0xf; + cplx_pll = core_cplx_pll[c_pll_sel]; + cplx_pll += cc_group[cluster] - 1; + sys_info->freq_processor[cpu] = + freq_c_pll[cplx_pll] / core_cplx_pll_div[c_pll_sel]; + } + +#if defined(CONFIG_FSL_IFC) + ccr = in_le32(&ifc_regs->ifc_ccr); + ccr = ((ccr & IFC_CCR_CLK_DIV_MASK) >> IFC_CCR_CLK_DIV_SHIFT) + 1; + + sys_info->freq_localbus = sys_info->freq_systembus / ccr; +#endif +} + + +int get_clocks(void) +{ + struct sys_info sys_info; + get_sys_info(&sys_info); + gd->cpu_clk = sys_info.freq_processor[0]; + gd->bus_clk = sys_info.freq_systembus; + gd->mem_clk = sys_info.freq_ddrbus; + +#if defined(CONFIG_FSL_ESDHC) + gd->arch.sdhc_clk = gd->bus_clk / 2; +#endif /* defined(CONFIG_FSL_ESDHC) */ + + if (gd->cpu_clk != 0) + return 0; + else + return 1; +} + +/******************************************** + * get_bus_freq + * return system bus freq in Hz + *********************************************/ +ulong get_bus_freq(ulong dummy) +{ + if (!gd->bus_clk) + get_clocks(); + + return gd->bus_clk; +} + +/******************************************** + * get_ddr_freq + * return ddr bus freq in Hz + *********************************************/ +ulong get_ddr_freq(ulong dummy) +{ + if (!gd->mem_clk) + get_clocks(); + + return gd->mem_clk; +} + +unsigned int mxc_get_clock(enum mxc_clock clk) +{ + switch (clk) { + case MXC_I2C_CLK: + return get_bus_freq(0) / 2; + default: + printf("Unsupported clock\n"); + } + return 0; +} |
