mirror of
https://github.com/AsahiLinux/u-boot
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39b0bbbb23
IFC has two register pages.Till IFC version 1.4 each register page is 4KB each.But IFC ver 2.0 register page size is 64KB each.IFC regiters structure is break into two viz FCM and RUNTIME.FCM(Flash control machine) registers are defined in PAGE0 and controls IFC generic functionality. RUNTIME registers are defined in PAGE1 and controls NAND and GPCM funcinality. FCM and RUNTIME structures defination is common for IFC version 1.4 and 2.0. Signed-off-by: Jaiprakash Singh <b44839@freescale.com> Signed-off-by: York Sun <yorksun@freescale.com>
130 lines
2.9 KiB
C
130 lines
2.9 KiB
C
/*
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* Copyright 2014 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/immap_ls102xa.h>
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#include <asm/arch/clock.h>
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#include <fsl_ifc.h>
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DECLARE_GLOBAL_DATA_PTR;
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#ifndef CONFIG_SYS_FSL_NUM_CC_PLLS
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#define CONFIG_SYS_FSL_NUM_CC_PLLS 2
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#endif
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void get_sys_info(struct sys_info *sys_info)
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{
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struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
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#ifdef CONFIG_FSL_IFC
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struct fsl_ifc ifc_regs = {(void *)CONFIG_SYS_IFC_ADDR, (void *)NULL};
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u32 ccr;
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#endif
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struct ccsr_clk *clk = (void *)(CONFIG_SYS_FSL_LS1_CLK_ADDR);
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unsigned int cpu;
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const u8 core_cplx_pll[6] = {
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[0] = 0, /* CC1 PPL / 1 */
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[1] = 0, /* CC1 PPL / 2 */
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[4] = 1, /* CC2 PPL / 1 */
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[5] = 1, /* CC2 PPL / 2 */
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};
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const u8 core_cplx_pll_div[6] = {
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[0] = 1, /* CC1 PPL / 1 */
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[1] = 2, /* CC1 PPL / 2 */
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[4] = 1, /* CC2 PPL / 1 */
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[5] = 2, /* CC2 PPL / 2 */
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};
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uint i;
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uint freq_c_pll[CONFIG_SYS_FSL_NUM_CC_PLLS];
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uint ratio[CONFIG_SYS_FSL_NUM_CC_PLLS];
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unsigned long sysclk = CONFIG_SYS_CLK_FREQ;
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sys_info->freq_systembus = sysclk;
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#ifdef CONFIG_DDR_CLK_FREQ
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sys_info->freq_ddrbus = CONFIG_DDR_CLK_FREQ;
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#else
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sys_info->freq_ddrbus = sysclk;
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#endif
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sys_info->freq_systembus *= (in_be32(&gur->rcwsr[0]) >>
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RCWSR0_SYS_PLL_RAT_SHIFT) & RCWSR0_SYS_PLL_RAT_MASK;
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sys_info->freq_ddrbus *= (in_be32(&gur->rcwsr[0]) >>
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RCWSR0_MEM_PLL_RAT_SHIFT) & RCWSR0_MEM_PLL_RAT_MASK;
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for (i = 0; i < CONFIG_SYS_FSL_NUM_CC_PLLS; i++) {
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ratio[i] = (in_be32(&clk->pllcgsr[i].pllcngsr) >> 1) & 0x3f;
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if (ratio[i] > 4)
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freq_c_pll[i] = sysclk * ratio[i];
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else
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freq_c_pll[i] = sys_info->freq_systembus * ratio[i];
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}
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for (cpu = 0; cpu < CONFIG_MAX_CPUS; cpu++) {
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u32 c_pll_sel = (in_be32(&clk->clkcsr[cpu].clkcncsr) >> 27)
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& 0xf;
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u32 cplx_pll = core_cplx_pll[c_pll_sel];
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sys_info->freq_processor[cpu] =
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freq_c_pll[cplx_pll] / core_cplx_pll_div[c_pll_sel];
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}
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#if defined(CONFIG_FSL_IFC)
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ccr = in_be32(&ifc_regs.gregs->ifc_ccr);
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ccr = ((ccr & IFC_CCR_CLK_DIV_MASK) >> IFC_CCR_CLK_DIV_SHIFT) + 1;
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sys_info->freq_localbus = sys_info->freq_systembus / ccr;
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#endif
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}
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int get_clocks(void)
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{
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struct sys_info sys_info;
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get_sys_info(&sys_info);
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gd->cpu_clk = sys_info.freq_processor[0];
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gd->bus_clk = sys_info.freq_systembus;
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gd->mem_clk = sys_info.freq_ddrbus * 2;
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#if defined(CONFIG_FSL_ESDHC)
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gd->arch.sdhc_clk = gd->bus_clk;
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#endif
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return 0;
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}
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ulong get_bus_freq(ulong dummy)
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{
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return gd->bus_clk;
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}
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ulong get_ddr_freq(ulong dummy)
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{
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return gd->mem_clk;
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}
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int get_serial_clock(void)
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{
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return gd->bus_clk / 2;
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}
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unsigned int mxc_get_clock(enum mxc_clock clk)
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{
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switch (clk) {
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case MXC_I2C_CLK:
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return get_bus_freq(0) / 2;
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case MXC_ESDHC_CLK:
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return get_bus_freq(0);
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case MXC_DSPI_CLK:
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return get_bus_freq(0) / 2;
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case MXC_UART_CLK:
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return get_bus_freq(0) / 2;
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default:
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printf("Unsupported clock\n");
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}
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return 0;
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}
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