u-boot/board/freescale/s32v234evb/clock.c

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/*
* (C) Copyright 2015, Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/mc_cgm_regs.h>
#include <asm/arch/mc_me_regs.h>
#include <asm/arch/clock.h>
/*
* Select the clock reference for required pll.
* pll - ARM_PLL, PERIPH_PLL, ENET_PLL, DDR_PLL, VIDEO_PLL.
* refclk_freq - input referece clock frequency (FXOSC - 40 MHZ, FIRC - 48 MHZ)
*/
static int select_pll_source_clk(enum pll_type pll, u32 refclk_freq)
{
u32 clk_src;
u32 pll_idx;
volatile struct src *src = (struct src *)SRC_SOC_BASE_ADDR;
/* select the pll clock source */
switch (refclk_freq) {
case FIRC_CLK_FREQ:
clk_src = SRC_GPR1_FIRC_CLK_SOURCE;
break;
case XOSC_CLK_FREQ:
clk_src = SRC_GPR1_XOSC_CLK_SOURCE;
break;
default:
/* The clock frequency for the source clock is unknown */
return -1;
}
/*
* The hardware definition is not uniform, it has to calculate again
* the recurrence formula.
*/
switch (pll) {
case PERIPH_PLL:
pll_idx = 3;
break;
case ENET_PLL:
pll_idx = 1;
break;
case DDR_PLL:
pll_idx = 2;;
break;
default:
pll_idx = pll;
}
writel(readl(&src->gpr1) | SRC_GPR1_PLL_SOURCE(pll_idx, clk_src),
&src->gpr1);
return 0;
}
static void entry_to_target_mode(u32 mode)
{
writel(mode | MC_ME_MCTL_KEY, MC_ME_MCTL);
writel(mode | MC_ME_MCTL_INVERTEDKEY, MC_ME_MCTL);
while ((readl(MC_ME_GS) & MC_ME_GS_S_MTRANS) != 0x00000000) ;
}
/*
* Program the pll according to the input parameters.
* pll - ARM_PLL, PERIPH_PLL, ENET_PLL, DDR_PLL, VIDEO_PLL.
* refclk_freq - input reference clock frequency (FXOSC - 40 MHZ, FIRC - 48 MHZ)
* freq - expected output frequency for PHY0
* freq1 - expected output frequency for PHY1
* dfs_nr - number of DFS modules for current PLL
* dfs - array with the activation dfs field, mfn and mfi
* plldv_prediv - divider of clkfreq_ref
* plldv_mfd - loop multiplication factor divider
* pllfd_mfn - numerator loop multiplication factor divider
* Please consult the PLLDIG chapter of platform manual
* before to use this function.
*)
*/
static int program_pll(enum pll_type pll, u32 refclk_freq, u32 freq0, u32 freq1,
u32 dfs_nr, u32 dfs[][DFS_PARAMS_Nr], u32 plldv_prediv,
u32 plldv_mfd, u32 pllfd_mfn)
{
u32 i, rfdphi1, rfdphi, dfs_on = 0, fvco;
/*
* This formula is from platform reference manual (Rev. 1, 6/2015), PLLDIG chapter.
*/
fvco =
(refclk_freq / plldv_prediv) * (plldv_mfd +
pllfd_mfn / (float)20480);
/*
* VCO should have value in [ PLL_MIN_FREQ, PLL_MAX_FREQ ]. Please consult
* the platform DataSheet in order to determine the allowed values.
*/
if (fvco < PLL_MIN_FREQ || fvco > PLL_MAX_FREQ) {
return -1;
}
if (select_pll_source_clk(pll, refclk_freq) < 0) {
return -1;
}
rfdphi = fvco / freq0;
rfdphi1 = (freq1 == 0) ? 0 : fvco / freq1;
writel(PLLDIG_PLLDV_RFDPHI1_SET(rfdphi1) |
PLLDIG_PLLDV_RFDPHI_SET(rfdphi) |
PLLDIG_PLLDV_PREDIV_SET(plldv_prediv) |
PLLDIG_PLLDV_MFD(plldv_mfd), PLLDIG_PLLDV(pll));
writel(readl(PLLDIG_PLLFD(pll)) | PLLDIG_PLLFD_MFN_SET(pllfd_mfn) |
PLLDIG_PLLFD_SMDEN, PLLDIG_PLLFD(pll));
/* switch on the pll in current mode */
writel(readl(MC_ME_RUNn_MC(0)) | MC_ME_RUNMODE_MC_PLL(pll),
MC_ME_RUNn_MC(0));
entry_to_target_mode(MC_ME_MCTL_RUN0);
/* Only ARM_PLL, ENET_PLL and DDR_PLL */
if ((pll == ARM_PLL) || (pll == ENET_PLL) || (pll == DDR_PLL)) {
/* DFS clk enable programming */
writel(DFS_CTRL_DLL_RESET, DFS_CTRL(pll));
writel(DFS_DLLPRG1_CPICTRL_SET(0x5) |
DFS_DLLPRG1_VSETTLCTRL_SET(0x1) |
DFS_DLLPRG1_CALBYPEN_SET(0x0) |
DFS_DLLPRG1_DACIN_SET(0x1) | DFS_DLLPRG1_LCKWT_SET(0x0) |
DFS_DLLPRG1_V2IGC_SET(0x5), DFS_DLLPRG1(pll));
for (i = 0; i < dfs_nr; i++) {
if (dfs[i][0]) {
writel(DFS_DVPORTn_MFI_SET(dfs[i][2]) |
DFS_DVPORTn_MFN_SET(dfs[i][1]),
DFS_DVPORTn(pll, i));
dfs_on |= (dfs[i][0] << i);
}
}
writel(readl(DFS_CTRL(pll)) & ~DFS_CTRL_DLL_RESET,
DFS_CTRL(pll));
writel(readl(DFS_PORTRESET(pll)) &
~DFS_PORTRESET_PORTRESET_SET(dfs_on),
DFS_PORTRESET(pll));
while ((readl(DFS_PORTSR(pll)) & dfs_on) != dfs_on) ;
}
entry_to_target_mode(MC_ME_MCTL_RUN0);
return 0;
}
static void aux_source_clk_config(uintptr_t cgm_addr, u8 ac, u32 source)
{
/* select the clock source */
writel(MC_CGM_ACn_SEL_SET(source), CGM_ACn_SC(cgm_addr, ac));
}
static void aux_div_clk_config(uintptr_t cgm_addr, u8 ac, u8 dc, u32 divider)
{
/* set the divider */
writel(MC_CGM_ACn_DCm_DE | MC_CGM_ACn_DCm_PREDIV(divider),
CGM_ACn_DCm(cgm_addr, ac, dc));
}
static void setup_sys_clocks(void)
{
/* set ARM PLL DFS 1 as SYSCLK */
writel((readl(MC_ME_RUNn_MC(0)) & ~MC_ME_RUNMODE_MC_SYSCLK_MASK) |
MC_ME_RUNMODE_MC_SYSCLK(0x2), MC_ME_RUNn_MC(0));
entry_to_target_mode(MC_ME_MCTL_RUN0);
/* select sysclks ARMPLL, ARMPLLDFS2, ARMPLLDFS3 */
writel(MC_ME_RUNMODE_SEC_CC_I_SYSCLK
(0x2,
MC_ME_RUNMODE_SEC_CC_I_SYSCLK1_OFFSET) |
MC_ME_RUNMODE_SEC_CC_I_SYSCLK(0x2,
MC_ME_RUNMODE_SEC_CC_I_SYSCLK2_OFFSET)
| MC_ME_RUNMODE_SEC_CC_I_SYSCLK(0x2,
MC_ME_RUNMODE_SEC_CC_I_SYSCLK3_OFFSET),
MC_ME_RUNn_SEC_CC_I(0));
/* setup the sys clock divider for CORE_CLK (1000MHz) */
writel(MC_CGM_SC_DCn_DE | MC_CGM_SC_DCn_PREDIV(0x0),
CGM_SC_DCn(MC_CGM1_BASE_ADDR, 0));
/* setup the sys clock divider for CORE2_CLK (500MHz) */
writel(MC_CGM_SC_DCn_DE | MC_CGM_SC_DCn_PREDIV(0x1),
CGM_SC_DCn(MC_CGM1_BASE_ADDR, 1));
/* setup the sys clock divider for SYS3_CLK (266 MHz) */
writel(MC_CGM_SC_DCn_DE | MC_CGM_SC_DCn_PREDIV(0x0),
CGM_SC_DCn(MC_CGM0_BASE_ADDR, 0));
/* setup the sys clock divider for SYS6_CLK (133 Mhz) */
writel(MC_CGM_SC_DCn_DE | MC_CGM_SC_DCn_PREDIV(0x1),
CGM_SC_DCn(MC_CGM0_BASE_ADDR, 1));
entry_to_target_mode(MC_ME_MCTL_RUN0);
}
static void setup_aux_clocks(void)
{
/*
* setup the aux clock divider for PERI_CLK
* (source: PERIPH_PLL_PHI_0/5, PERI_CLK - 80 MHz)
*/
aux_source_clk_config(MC_CGM0_BASE_ADDR, 5, MC_CGM_ACn_SEL_PERPLLDIVX);
aux_div_clk_config(MC_CGM0_BASE_ADDR, 5, 0, 4);
/* setup the aux clock divider for LIN_CLK (40MHz) */
aux_source_clk_config(MC_CGM0_BASE_ADDR, 3, MC_CGM_ACn_SEL_PERPLLDIVX);
aux_div_clk_config(MC_CGM0_BASE_ADDR, 3, 0, 1);
/* setup the aux clock divider for ENET_TIME_CLK (50MHz) */
aux_source_clk_config(MC_CGM0_BASE_ADDR, 7, MC_CGM_ACn_SEL_ENETPLL);
aux_div_clk_config(MC_CGM0_BASE_ADDR, 7, 1, 9);
/* setup the aux clock divider for ENET_CLK (50MHz) */
aux_source_clk_config(MC_CGM2_BASE_ADDR, 2, MC_CGM_ACn_SEL_ENETPLL);
aux_div_clk_config(MC_CGM2_BASE_ADDR, 2, 0, 9);
/* setup the aux clock divider for SDHC_CLK (50 MHz). */
aux_source_clk_config(MC_CGM0_BASE_ADDR, 15, MC_CGM_ACn_SEL_ENETPLL);
aux_div_clk_config(MC_CGM0_BASE_ADDR, 15, 0, 9);
/* setup the aux clock divider for DDR_CLK (533MHz) and APEX_SYS_CLK (266MHz) */
aux_source_clk_config(MC_CGM0_BASE_ADDR, 8, MC_CGM_ACn_SEL_DDRPLL);
aux_div_clk_config(MC_CGM0_BASE_ADDR, 8, 0, 0);
/* setup the aux clock divider for DDR4_CLK (133,25MHz) */
aux_div_clk_config(MC_CGM0_BASE_ADDR, 8, 1, 3);
entry_to_target_mode(MC_ME_MCTL_RUN0);
}
static void enable_modules_clock(void)
{
/* PIT0 */
writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL58);
/* PIT1 */
writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL170);
/* LINFLEX0 */
writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL83);
/* LINFLEX1 */
writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL188);
/* ENET */
writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL50);
/* SDHC */
writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL93);
/* IIC0 */
writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL81);
/* IIC1 */
writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL184);
/* IIC2 */
writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL186);
/* MMDC0 */
writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL54);
/* MMDC1 */
writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL162);
entry_to_target_mode(MC_ME_MCTL_RUN0);
}
void clock_init(void)
{
unsigned int arm_dfs[ARM_PLL_PHI1_DFS_Nr][DFS_PARAMS_Nr] = {
{ARM_PLL_PHI1_DFS1_EN, ARM_PLL_PHI1_DFS1_MFN,
ARM_PLL_PHI1_DFS1_MFI},
{ARM_PLL_PHI1_DFS2_EN, ARM_PLL_PHI1_DFS2_MFN,
ARM_PLL_PHI1_DFS2_MFI},
{ARM_PLL_PHI1_DFS3_EN, ARM_PLL_PHI1_DFS3_MFN,
ARM_PLL_PHI1_DFS3_MFI}
};
unsigned int enet_dfs[ENET_PLL_PHI1_DFS_Nr][DFS_PARAMS_Nr] = {
{ENET_PLL_PHI1_DFS1_EN, ENET_PLL_PHI1_DFS1_MFN,
ENET_PLL_PHI1_DFS1_MFI},
{ENET_PLL_PHI1_DFS2_EN, ENET_PLL_PHI1_DFS2_MFN,
ENET_PLL_PHI1_DFS2_MFI},
{ENET_PLL_PHI1_DFS3_EN, ENET_PLL_PHI1_DFS3_MFN,
ENET_PLL_PHI1_DFS3_MFI},
{ENET_PLL_PHI1_DFS4_EN, ENET_PLL_PHI1_DFS4_MFN,
ENET_PLL_PHI1_DFS4_MFI}
};
unsigned int ddr_dfs[DDR_PLL_PHI1_DFS_Nr][DFS_PARAMS_Nr] = {
{DDR_PLL_PHI1_DFS1_EN, DDR_PLL_PHI1_DFS1_MFN,
DDR_PLL_PHI1_DFS1_MFI},
{DDR_PLL_PHI1_DFS2_EN, DDR_PLL_PHI1_DFS2_MFN,
DDR_PLL_PHI1_DFS2_MFI},
{DDR_PLL_PHI1_DFS3_EN, DDR_PLL_PHI1_DFS3_MFN,
DDR_PLL_PHI1_DFS3_MFI}
};
writel(MC_ME_RUN_PCn_DRUN | MC_ME_RUN_PCn_RUN0 | MC_ME_RUN_PCn_RUN1 |
MC_ME_RUN_PCn_RUN2 | MC_ME_RUN_PCn_RUN3, MC_ME_RUN_PCn(0));
/* turn on FXOSC */
writel(MC_ME_RUNMODE_MC_MVRON | MC_ME_RUNMODE_MC_XOSCON |
MC_ME_RUNMODE_MC_FIRCON | MC_ME_RUNMODE_MC_SYSCLK(0x1),
MC_ME_RUNn_MC(0));
entry_to_target_mode(MC_ME_MCTL_RUN0);
program_pll(ARM_PLL, XOSC_CLK_FREQ, ARM_PLL_PHI0_FREQ,
ARM_PLL_PHI1_FREQ, ARM_PLL_PHI1_DFS_Nr, arm_dfs,
ARM_PLL_PLLDV_PREDIV, ARM_PLL_PLLDV_MFD, ARM_PLL_PLLDV_MFN);
setup_sys_clocks();
program_pll(PERIPH_PLL, XOSC_CLK_FREQ, PERIPH_PLL_PHI0_FREQ,
PERIPH_PLL_PHI1_FREQ, PERIPH_PLL_PHI1_DFS_Nr, NULL,
PERIPH_PLL_PLLDV_PREDIV, PERIPH_PLL_PLLDV_MFD,
PERIPH_PLL_PLLDV_MFN);
program_pll(ENET_PLL, XOSC_CLK_FREQ, ENET_PLL_PHI0_FREQ,
ENET_PLL_PHI1_FREQ, ENET_PLL_PHI1_DFS_Nr, enet_dfs,
ENET_PLL_PLLDV_PREDIV, ENET_PLL_PLLDV_MFD,
ENET_PLL_PLLDV_MFN);
program_pll(DDR_PLL, XOSC_CLK_FREQ, DDR_PLL_PHI0_FREQ,
DDR_PLL_PHI1_FREQ, DDR_PLL_PHI1_DFS_Nr, ddr_dfs,
DDR_PLL_PLLDV_PREDIV, DDR_PLL_PLLDV_MFD, DDR_PLL_PLLDV_MFN);
program_pll(VIDEO_PLL, XOSC_CLK_FREQ, VIDEO_PLL_PHI0_FREQ,
VIDEO_PLL_PHI1_FREQ, VIDEO_PLL_PHI1_DFS_Nr, NULL,
VIDEO_PLL_PLLDV_PREDIV, VIDEO_PLL_PLLDV_MFD,
VIDEO_PLL_PLLDV_MFN);
setup_aux_clocks();
enable_modules_clock();
}