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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2013-2016, Freescale Semiconductor, Inc.
*/
#include <common.h>
#include <clock_legacy.h>
#include <cpu_func.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/clock.h>
#include <asm/arch/mc_cgm_regs.h>
#include <asm/arch/mc_me_regs.h>
#include <asm/arch/mc_rgm_regs.h>
#include <netdev.h>
#include <div64.h>
#include <errno.h>
u32 get_cpu_rev(void)
{
struct mscm_ir *mscmir = (struct mscm_ir *)MSCM_BASE_ADDR;
u32 cpu = readl(&mscmir->cpxtype);
return cpu;
}
DECLARE_GLOBAL_DATA_PTR;
static uintptr_t get_pllfreq(u32 pll, u32 refclk_freq, u32 plldv,
u32 pllfd, u32 selected_output)
{
u32 vco = 0, plldv_prediv = 0, plldv_mfd = 0, pllfd_mfn = 0;
u32 plldv_rfdphi_div = 0, fout = 0;
u32 dfs_portn = 0, dfs_mfn = 0, dfs_mfi = 0;
if (selected_output > DFS_MAXNUMBER) {
return -1;
}
plldv_prediv =
(plldv & PLLDIG_PLLDV_PREDIV_MASK) >> PLLDIG_PLLDV_PREDIV_OFFSET;
plldv_mfd = (plldv & PLLDIG_PLLDV_MFD_MASK);
pllfd_mfn = (pllfd & PLLDIG_PLLFD_MFN_MASK);
plldv_prediv = plldv_prediv == 0 ? 1 : plldv_prediv;
/* The formula for VCO is from TR manual, rev. D */
vco = refclk_freq / plldv_prediv * (plldv_mfd + pllfd_mfn / 20481);
if (selected_output != 0) {
/* Determine the RFDPHI for PHI1 */
plldv_rfdphi_div =
(plldv & PLLDIG_PLLDV_RFDPHI1_MASK) >>
PLLDIG_PLLDV_RFDPHI1_OFFSET;
plldv_rfdphi_div = plldv_rfdphi_div == 0 ? 1 : plldv_rfdphi_div;
if (pll == ARM_PLL || pll == ENET_PLL || pll == DDR_PLL) {
dfs_portn =
readl(DFS_DVPORTn(pll, selected_output - 1));
dfs_mfi =
(dfs_portn & DFS_DVPORTn_MFI_MASK) >>
DFS_DVPORTn_MFI_OFFSET;
dfs_mfn =
(dfs_portn & DFS_DVPORTn_MFI_MASK) >>
DFS_DVPORTn_MFI_OFFSET;
fout = vco / (dfs_mfi + (dfs_mfn / 256));
} else {
fout = vco / plldv_rfdphi_div;
}
} else {
/* Determine the RFDPHI for PHI0 */
plldv_rfdphi_div =
(plldv & PLLDIG_PLLDV_RFDPHI_MASK) >>
PLLDIG_PLLDV_RFDPHI_OFFSET;
fout = vco / plldv_rfdphi_div;
}
return fout;
}
/* Implemented for ARMPLL, PERIPH_PLL, ENET_PLL, DDR_PLL, VIDEO_LL */
static uintptr_t decode_pll(enum pll_type pll, u32 refclk_freq,
u32 selected_output)
{
u32 plldv, pllfd;
plldv = readl(PLLDIG_PLLDV(pll));
pllfd = readl(PLLDIG_PLLFD(pll));
return get_pllfreq(pll, refclk_freq, plldv, pllfd, selected_output);
}
static u32 get_mcu_main_clk(void)
{
u32 coreclk_div;
u32 sysclk_sel;
u32 freq = 0;
sysclk_sel = readl(CGM_SC_SS(MC_CGM1_BASE_ADDR)) & MC_CGM_SC_SEL_MASK;
sysclk_sel >>= MC_CGM_SC_SEL_OFFSET;
coreclk_div =
readl(CGM_SC_DCn(MC_CGM1_BASE_ADDR, 0)) & MC_CGM_SC_DCn_PREDIV_MASK;
coreclk_div >>= MC_CGM_SC_DCn_PREDIV_OFFSET;
coreclk_div += 1;
switch (sysclk_sel) {
case MC_CGM_SC_SEL_FIRC:
freq = FIRC_CLK_FREQ;
break;
case MC_CGM_SC_SEL_XOSC:
freq = XOSC_CLK_FREQ;
break;
case MC_CGM_SC_SEL_ARMPLL:
/* ARMPLL has as source XOSC and CORE_CLK has as input PHI0 */
freq = decode_pll(ARM_PLL, XOSC_CLK_FREQ, 0);
break;
case MC_CGM_SC_SEL_CLKDISABLE:
printf("Sysclk is disabled\n");
break;
default:
printf("unsupported system clock select\n");
}
return freq / coreclk_div;
}
static u32 get_sys_clk(u32 number)
{
u32 sysclk_div, sysclk_div_number;
u32 sysclk_sel;
u32 freq = 0;
switch (number) {
case 3:
sysclk_div_number = 0;
break;
case 6:
sysclk_div_number = 1;
break;
default:
printf("unsupported system clock \n");
return -1;
}
sysclk_sel = readl(CGM_SC_SS(MC_CGM0_BASE_ADDR)) & MC_CGM_SC_SEL_MASK;
sysclk_sel >>= MC_CGM_SC_SEL_OFFSET;
sysclk_div =
readl(CGM_SC_DCn(MC_CGM1_BASE_ADDR, sysclk_div_number)) &
MC_CGM_SC_DCn_PREDIV_MASK;
sysclk_div >>= MC_CGM_SC_DCn_PREDIV_OFFSET;
sysclk_div += 1;
switch (sysclk_sel) {
case MC_CGM_SC_SEL_FIRC:
freq = FIRC_CLK_FREQ;
break;
case MC_CGM_SC_SEL_XOSC:
freq = XOSC_CLK_FREQ;
break;
case MC_CGM_SC_SEL_ARMPLL:
/* ARMPLL has as source XOSC and SYSn_CLK has as input DFS1 */
freq = decode_pll(ARM_PLL, XOSC_CLK_FREQ, 1);
break;
case MC_CGM_SC_SEL_CLKDISABLE:
printf("Sysclk is disabled\n");
break;
default:
printf("unsupported system clock select\n");
}
return freq / sysclk_div;
}
static u32 get_peripherals_clk(void)
{
u32 aux5clk_div;
u32 freq = 0;
aux5clk_div =
readl(CGM_ACn_DCm(MC_CGM0_BASE_ADDR, 5, 0)) &
MC_CGM_ACn_DCm_PREDIV_MASK;
aux5clk_div >>= MC_CGM_ACn_DCm_PREDIV_OFFSET;
aux5clk_div += 1;
freq = decode_pll(PERIPH_PLL, XOSC_CLK_FREQ, 0);
return freq / aux5clk_div;
}
static u32 get_uart_clk(void)
{
u32 auxclk3_div, auxclk3_sel, freq = 0;
auxclk3_sel =
readl(CGM_ACn_SS(MC_CGM0_BASE_ADDR, 3)) & MC_CGM_ACn_SEL_MASK;
auxclk3_sel >>= MC_CGM_ACn_SEL_OFFSET;
auxclk3_div =
readl(CGM_ACn_DCm(MC_CGM0_BASE_ADDR, 3, 0)) &
MC_CGM_ACn_DCm_PREDIV_MASK;
auxclk3_div >>= MC_CGM_ACn_DCm_PREDIV_OFFSET;
auxclk3_div += 1;
switch (auxclk3_sel) {
case MC_CGM_ACn_SEL_FIRC:
freq = FIRC_CLK_FREQ;
break;
case MC_CGM_ACn_SEL_XOSC:
freq = XOSC_CLK_FREQ;
break;
case MC_CGM_ACn_SEL_PERPLLDIVX:
freq = get_peripherals_clk() / 3;
break;
case MC_CGM_ACn_SEL_SYSCLK:
freq = get_sys_clk(6);
break;
default:
printf("unsupported system clock select\n");
}
return freq / auxclk3_div;
}
static u32 get_fec_clk(void)
{
u32 aux2clk_div;
u32 freq = 0;
aux2clk_div =
readl(CGM_ACn_DCm(MC_CGM0_BASE_ADDR, 2, 0)) &
MC_CGM_ACn_DCm_PREDIV_MASK;
aux2clk_div >>= MC_CGM_ACn_DCm_PREDIV_OFFSET;
aux2clk_div += 1;
freq = decode_pll(ENET_PLL, XOSC_CLK_FREQ, 0);
return freq / aux2clk_div;
}
static u32 get_usdhc_clk(void)
{
u32 aux15clk_div;
u32 freq = 0;
aux15clk_div =
readl(CGM_ACn_DCm(MC_CGM0_BASE_ADDR, 15, 0)) &
MC_CGM_ACn_DCm_PREDIV_MASK;
aux15clk_div >>= MC_CGM_ACn_DCm_PREDIV_OFFSET;
aux15clk_div += 1;
freq = decode_pll(ENET_PLL, XOSC_CLK_FREQ, 4);
return freq / aux15clk_div;
}
static u32 get_i2c_clk(void)
{
return get_peripherals_clk();
}
/* return clocks in Hz */
unsigned int mxc_get_clock(enum mxc_clock clk)
{
switch (clk) {
case MXC_ARM_CLK:
return get_mcu_main_clk();
case MXC_PERIPHERALS_CLK:
return get_peripherals_clk();
case MXC_UART_CLK:
return get_uart_clk();
case MXC_FEC_CLK:
return get_fec_clk();
case MXC_I2C_CLK:
return get_i2c_clk();
case MXC_USDHC_CLK:
return get_usdhc_clk();
default:
break;
}
printf("Error: Unsupported function to read the frequency! \
Please define it correctly!");
return -1;
}
/* Not yet implemented - int soc_clk_dump(); */
#if defined(CONFIG_DISPLAY_CPUINFO)
static char *get_reset_cause(void)
{
u32 cause = readl(MC_RGM_BASE_ADDR + 0x300);
switch (cause) {
case F_SWT4:
return "WDOG";
case F_JTAG:
return "JTAG";
case F_FCCU_SOFT:
return "FCCU soft reaction";
case F_FCCU_HARD:
return "FCCU hard reaction";
case F_SOFT_FUNC:
return "Software Functional reset";
case F_ST_DONE:
return "Self Test done reset";
case F_EXT_RST:
return "External reset";
default:
return "unknown reset";
}
}
#define SRC_SCR_SW_RST (1<<12)
void reset_cpu(ulong addr)
{
printf("Feature not supported.\n");
};
int print_cpuinfo(void)
{
printf("CPU: Freescale Treerunner S32V234 at %d MHz\n",
mxc_get_clock(MXC_ARM_CLK) / 1000000);
printf("Reset cause: %s\n", get_reset_cause());
return 0;
}
#endif
int cpu_eth_init(bd_t * bis)
{
int rc = -ENODEV;
#if defined(CONFIG_FEC_MXC)
rc = fecmxc_initialize(bis);
#endif
return rc;
}
int get_clocks(void)
{
#ifdef CONFIG_FSL_ESDHC_IMX
gd->arch.sdhc_clk = mxc_get_clock(MXC_USDHC_CLK);
#endif
return 0;
}