123 lines
2.7 KiB
C
123 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright 2014 Freescale Semiconductor, Inc.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <clock_legacy.h>
|
|
#include <asm/global_data.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/immap_ls102xa.h>
|
|
#include <asm/arch/clock.h>
|
|
#include <fsl_ifc.h>
|
|
|
|
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);
|
|
struct ccsr_clk *clk = (void *)(CONFIG_SYS_FSL_LS1_CLK_ADDR);
|
|
unsigned int cpu;
|
|
const u8 core_cplx_pll[6] = {
|
|
[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[6] = {
|
|
[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 *= (in_be32(&gur->rcwsr[0]) >>
|
|
RCWSR0_SYS_PLL_RAT_SHIFT) & RCWSR0_SYS_PLL_RAT_MASK;
|
|
sys_info->freq_ddrbus *= (in_be32(&gur->rcwsr[0]) >>
|
|
RCWSR0_MEM_PLL_RAT_SHIFT) & 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) & 0x3f;
|
|
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];
|
|
}
|
|
|
|
#if defined(CONFIG_FSL_IFC)
|
|
sys_info->freq_localbus = sys_info->freq_systembus;
|
|
#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 * 2;
|
|
|
|
#if defined(CONFIG_FSL_ESDHC)
|
|
gd->arch.sdhc_clk = gd->bus_clk;
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
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 / 2;
|
|
}
|
|
|
|
unsigned int mxc_get_clock(enum mxc_clock clk)
|
|
{
|
|
switch (clk) {
|
|
case MXC_I2C_CLK:
|
|
return get_bus_freq(0) / 2;
|
|
case MXC_DSPI_CLK:
|
|
return get_bus_freq(0) / 2;
|
|
case MXC_UART_CLK:
|
|
return get_bus_freq(0) / 2;
|
|
default:
|
|
printf("Unsupported clock\n");
|
|
}
|
|
return 0;
|
|
}
|