From 8281c58fd46d095e28e60b2fb0ce84b4444896f8 Mon Sep 17 00:00:00 2001 From: Mingkai Hu Date: Mon, 26 Oct 2015 19:47:51 +0800 Subject: armv8/fsl_lsch2: Add fsl_lsch2 SoC Freescale LayerScape with Chassis Generation 2 is a set of SoCs with ARMv8 cores and 2rd generation of Chassis. Signed-off-by: Li Yang Signed-off-by: Hou Zhiqiang Signed-off-by: Mingkai Hu Signed-off-by: Gong Qianyu Reviewed-by: York Sun --- .../arm/cpu/armv8/fsl-layerscape/fsl_lsch2_speed.c | 137 +++++++++++++++++++++ 1 file changed, 137 insertions(+) create mode 100644 arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_speed.c (limited to 'arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_speed.c') diff --git a/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_speed.c b/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_speed.c new file mode 100644 index 0000000..ea3723f --- /dev/null +++ b/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_speed.c @@ -0,0 +1,137 @@ +/* + * Copyright 2015 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + +#ifndef CONFIG_SYS_FSL_NUM_CC_PLLS +#define CONFIG_SYS_FSL_NUM_CC_PLLS 2 +#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, (void *)NULL}; + u32 ccr; +#endif + struct ccsr_clk *clk = (void *)(CONFIG_SYS_FSL_CLK_ADDR); + unsigned int cpu; + const u8 core_cplx_pll[8] = { + [0] = 0, /* CC1 PPL / 1 */ + [1] = 0, /* CC1 PPL / 2 */ + [4] = 1, /* CC2 PPL / 1 */ + [5] = 1, /* CC2 PPL / 2 */ + }; + + const u8 core_cplx_pll_div[8] = { + [0] = 1, /* CC1 PPL / 1 */ + [1] = 2, /* CC1 PPL / 2 */ + [4] = 1, /* CC2 PPL / 1 */ + [5] = 2, /* CC2 PPL / 2 */ + }; + + uint i; + 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; + + 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 *= (gur_in32(&gur->rcwsr[0]) >> + FSL_CHASSIS2_RCWSR0_SYS_PLL_RAT_SHIFT) & + FSL_CHASSIS2_RCWSR0_SYS_PLL_RAT_MASK; + sys_info->freq_ddrbus *= (gur_in32(&gur->rcwsr[0]) >> + FSL_CHASSIS2_RCWSR0_MEM_PLL_RAT_SHIFT) & + FSL_CHASSIS2_RCWSR0_MEM_PLL_RAT_MASK; + + for (i = 0; i < CONFIG_SYS_FSL_NUM_CC_PLLS; i++) { + ratio[i] = (in_be32(&clk->pllcgsr[i].pllcngsr) >> 1) & 0xff; + if (ratio[i] > 4) + freq_c_pll[i] = sysclk * ratio[i]; + else + freq_c_pll[i] = sys_info->freq_systembus * ratio[i]; + } + + for (cpu = 0; cpu < CONFIG_MAX_CPUS; cpu++) { + u32 c_pll_sel = (in_be32(&clk->clkcsr[cpu].clkcncsr) >> 27) + & 0xf; + u32 cplx_pll = core_cplx_pll[c_pll_sel]; + + sys_info->freq_processor[cpu] = + freq_c_pll[cplx_pll] / core_cplx_pll_div[c_pll_sel]; + } + +#define HWA_CGA_M1_CLK_SEL 0xe0000000 +#define HWA_CGA_M1_CLK_SHIFT 29 + +#define HWA_CGA_M2_CLK_SEL 0x00000007 +#define HWA_CGA_M2_CLK_SHIFT 0 + +#if defined(CONFIG_FSL_IFC) + ccr = ifc_in32(&ifc_regs.gregs->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 (gd->cpu_clk != 0) + return 0; + else + return 1; +} + +ulong get_bus_freq(ulong dummy) +{ + return gd->bus_clk; +} + +ulong get_ddr_freq(ulong dummy) +{ + return gd->mem_clk; +} + +int get_serial_clock(void) +{ + return gd->bus_clk; +} + +unsigned int mxc_get_clock(enum mxc_clock clk) +{ + switch (clk) { + case MXC_I2C_CLK: + return get_bus_freq(0); + case MXC_DSPI_CLK: + return get_bus_freq(0); + case MXC_UART_CLK: + return get_bus_freq(0); + default: + printf("Unsupported clock\n"); + } + return 0; +} -- cgit v1.1