410 lines
10 KiB
C
410 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* clock_ti814x.c
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*
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* Clocks for TI814X based boards
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*
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* Copyright (C) 2013, Texas Instruments, Incorporated
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*/
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#include <common.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/hardware.h>
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#include <asm/io.h>
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/* PRCM */
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#define PRCM_MOD_EN 0x2
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/* CLK_SRC */
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#define OSC_SRC0 0
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#define OSC_SRC1 1
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#define L3_OSC_SRC OSC_SRC0
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#define OSC_0_FREQ 20
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#define DCO_HS2_MIN 500
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#define DCO_HS2_MAX 1000
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#define DCO_HS1_MIN 1000
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#define DCO_HS1_MAX 2000
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#define SELFREQDCO_HS2 0x00000801
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#define SELFREQDCO_HS1 0x00001001
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#define MPU_N 0x1
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#define MPU_M 0x3C
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#define MPU_M2 1
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#define MPU_CLKCTRL 0x1
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#define L3_N 19
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#define L3_M 880
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#define L3_M2 4
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#define L3_CLKCTRL 0x801
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#define DDR_N 19
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#define DDR_M 666
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#define DDR_M2 2
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#define DDR_CLKCTRL 0x801
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/* ADPLLJ register values */
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#define ADPLLJ_CLKCTRL_HS2 0x00000801 /* HS2 mode, TINT2 = 1 */
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#define ADPLLJ_CLKCTRL_HS1 0x00001001 /* HS1 mode, TINT2 = 1 */
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#define ADPLLJ_CLKCTRL_CLKDCOLDOEN (1 << 29)
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#define ADPLLJ_CLKCTRL_IDLE (1 << 23)
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#define ADPLLJ_CLKCTRL_CLKOUTEN (1 << 20)
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#define ADPLLJ_CLKCTRL_CLKOUTLDOEN (1 << 19)
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#define ADPLLJ_CLKCTRL_CLKDCOLDOPWDNZ (1 << 17)
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#define ADPLLJ_CLKCTRL_LPMODE (1 << 12)
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#define ADPLLJ_CLKCTRL_DRIFTGUARDIAN (1 << 11)
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#define ADPLLJ_CLKCTRL_REGM4XEN (1 << 10)
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#define ADPLLJ_CLKCTRL_TINITZ (1 << 0)
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#define ADPLLJ_CLKCTRL_CLKDCO (ADPLLJ_CLKCTRL_CLKDCOLDOEN | \
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ADPLLJ_CLKCTRL_CLKOUTEN | \
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ADPLLJ_CLKCTRL_CLKOUTLDOEN | \
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ADPLLJ_CLKCTRL_CLKDCOLDOPWDNZ)
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#define ADPLLJ_STATUS_PHASELOCK (1 << 10)
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#define ADPLLJ_STATUS_FREQLOCK (1 << 9)
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#define ADPLLJ_STATUS_PHSFRQLOCK (ADPLLJ_STATUS_PHASELOCK | \
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ADPLLJ_STATUS_FREQLOCK)
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#define ADPLLJ_STATUS_BYPASSACK (1 << 8)
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#define ADPLLJ_STATUS_BYPASS (1 << 0)
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#define ADPLLJ_STATUS_BYPASSANDACK (ADPLLJ_STATUS_BYPASSACK | \
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ADPLLJ_STATUS_BYPASS)
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#define ADPLLJ_TENABLE_ENB (1 << 0)
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#define ADPLLJ_TENABLEDIV_ENB (1 << 0)
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#define ADPLLJ_M2NDIV_M2SHIFT 16
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#define MPU_PLL_BASE (PLL_SUBSYS_BASE + 0x048)
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#define L3_PLL_BASE (PLL_SUBSYS_BASE + 0x110)
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#define DDR_PLL_BASE (PLL_SUBSYS_BASE + 0x290)
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struct ad_pll {
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unsigned int pwrctrl;
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unsigned int clkctrl;
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unsigned int tenable;
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unsigned int tenablediv;
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unsigned int m2ndiv;
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unsigned int mn2div;
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unsigned int fracdiv;
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unsigned int bwctrl;
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unsigned int fracctrl;
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unsigned int status;
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unsigned int m3div;
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unsigned int rampctrl;
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};
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#define OSC_SRC_CTRL (PLL_SUBSYS_BASE + 0x2C0)
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#define ENET_CLKCTRL_CMPL 0x30000
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#define SATA_PLL_BASE (CTRL_BASE + 0x0720)
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struct sata_pll {
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unsigned int pllcfg0;
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unsigned int pllcfg1;
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unsigned int pllcfg2;
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unsigned int pllcfg3;
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unsigned int pllcfg4;
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unsigned int pllstatus;
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unsigned int rxstatus;
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unsigned int txstatus;
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unsigned int testcfg;
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};
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#define SEL_IN_FREQ (0x1 << 31)
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#define DIGCLRZ (0x1 << 30)
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#define ENDIGLDO (0x1 << 4)
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#define APLL_CP_CURR (0x1 << 3)
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#define ENBGSC_REF (0x1 << 2)
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#define ENPLLLDO (0x1 << 1)
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#define ENPLL (0x1 << 0)
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#define SATA_PLLCFG0_1 (SEL_IN_FREQ | ENBGSC_REF)
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#define SATA_PLLCFG0_2 (SEL_IN_FREQ | ENDIGLDO | ENBGSC_REF)
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#define SATA_PLLCFG0_3 (SEL_IN_FREQ | ENDIGLDO | ENBGSC_REF | ENPLLLDO)
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#define SATA_PLLCFG0_4 (SEL_IN_FREQ | DIGCLRZ | ENDIGLDO | ENBGSC_REF | \
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ENPLLLDO | ENPLL)
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#define PLL_LOCK (0x1 << 0)
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#define ENSATAMODE (0x1 << 31)
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#define PLLREFSEL (0x1 << 30)
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#define MDIVINT (0x4b << 18)
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#define EN_CLKAUX (0x1 << 5)
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#define EN_CLK125M (0x1 << 4)
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#define EN_CLK100M (0x1 << 3)
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#define EN_CLK50M (0x1 << 2)
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#define SATA_PLLCFG1 (ENSATAMODE | \
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PLLREFSEL | \
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MDIVINT | \
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EN_CLKAUX | \
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EN_CLK125M | \
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EN_CLK100M | \
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EN_CLK50M)
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#define DIGLDO_EN_CAPLESSMODE (0x1 << 22)
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#define PLLDO_EN_LDO_STABLE (0x1 << 11)
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#define PLLDO_EN_BUF_CUR (0x1 << 7)
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#define PLLDO_EN_LP (0x1 << 6)
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#define PLLDO_CTRL_TRIM_1_4V (0x10 << 1)
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#define SATA_PLLCFG3 (DIGLDO_EN_CAPLESSMODE | \
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PLLDO_EN_LDO_STABLE | \
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PLLDO_EN_BUF_CUR | \
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PLLDO_EN_LP | \
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PLLDO_CTRL_TRIM_1_4V)
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const struct cm_alwon *cmalwon = (struct cm_alwon *)CM_ALWON_BASE;
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const struct cm_def *cmdef = (struct cm_def *)CM_DEFAULT_BASE;
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const struct sata_pll *spll = (struct sata_pll *)SATA_PLL_BASE;
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/*
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* Enable the peripheral clock for required peripherals
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*/
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static void enable_per_clocks(void)
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{
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/* HSMMC1 */
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writel(PRCM_MOD_EN, &cmalwon->mmchs1clkctrl);
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while (readl(&cmalwon->mmchs1clkctrl) != PRCM_MOD_EN)
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;
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/* Ethernet */
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writel(PRCM_MOD_EN, &cmalwon->ethclkstctrl);
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writel(PRCM_MOD_EN, &cmalwon->ethernet0clkctrl);
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while ((readl(&cmalwon->ethernet0clkctrl) & ENET_CLKCTRL_CMPL) != 0)
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;
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writel(PRCM_MOD_EN, &cmalwon->ethernet1clkctrl);
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while ((readl(&cmalwon->ethernet1clkctrl) & ENET_CLKCTRL_CMPL) != 0)
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;
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/* RTC clocks */
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writel(PRCM_MOD_EN, &cmalwon->rtcclkstctrl);
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writel(PRCM_MOD_EN, &cmalwon->rtcclkctrl);
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while (readl(&cmalwon->rtcclkctrl) != PRCM_MOD_EN)
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;
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}
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/*
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* select the HS1 or HS2 for DCO Freq
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* return : CLKCTRL
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*/
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static u32 pll_dco_freq_sel(u32 clkout_dco)
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{
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if (clkout_dco >= DCO_HS2_MIN && clkout_dco < DCO_HS2_MAX)
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return SELFREQDCO_HS2;
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else if (clkout_dco >= DCO_HS1_MIN && clkout_dco < DCO_HS1_MAX)
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return SELFREQDCO_HS1;
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else
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return -1;
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}
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/*
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* select the sigma delta config
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* return: sigma delta val
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*/
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static u32 pll_sigma_delta_val(u32 clkout_dco)
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{
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u32 sig_val = 0;
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sig_val = (clkout_dco + 225) / 250;
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sig_val = sig_val << 24;
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return sig_val;
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}
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/*
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* configure individual ADPLLJ
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*/
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static void pll_config(u32 base, u32 n, u32 m, u32 m2,
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u32 clkctrl_val, int adpllj)
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{
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const struct ad_pll *adpll = (struct ad_pll *)base;
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u32 m2nval, mn2val, read_clkctrl = 0, clkout_dco = 0;
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u32 sig_val = 0, hs_mod = 0;
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m2nval = (m2 << ADPLLJ_M2NDIV_M2SHIFT) | n;
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mn2val = m;
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/* calculate clkout_dco */
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clkout_dco = ((OSC_0_FREQ / (n+1)) * m);
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/* sigma delta & Hs mode selection skip for ADPLLS*/
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if (adpllj) {
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sig_val = pll_sigma_delta_val(clkout_dco);
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hs_mod = pll_dco_freq_sel(clkout_dco);
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}
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/* by-pass pll */
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read_clkctrl = readl(&adpll->clkctrl);
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writel((read_clkctrl | ADPLLJ_CLKCTRL_IDLE), &adpll->clkctrl);
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while ((readl(&adpll->status) & ADPLLJ_STATUS_BYPASSANDACK)
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!= ADPLLJ_STATUS_BYPASSANDACK)
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;
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/* clear TINITZ */
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read_clkctrl = readl(&adpll->clkctrl);
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writel((read_clkctrl & ~ADPLLJ_CLKCTRL_TINITZ), &adpll->clkctrl);
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/*
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* ref_clk = 20/(n + 1);
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* clkout_dco = ref_clk * m;
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* clk_out = clkout_dco/m2;
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*/
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read_clkctrl = readl(&adpll->clkctrl) &
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~(ADPLLJ_CLKCTRL_LPMODE |
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ADPLLJ_CLKCTRL_DRIFTGUARDIAN |
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ADPLLJ_CLKCTRL_REGM4XEN);
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writel(m2nval, &adpll->m2ndiv);
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writel(mn2val, &adpll->mn2div);
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/* Skip for modena(ADPLLS) */
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if (adpllj) {
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writel(sig_val, &adpll->fracdiv);
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writel((read_clkctrl | hs_mod), &adpll->clkctrl);
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}
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/* Load M2, N2 dividers of ADPLL */
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writel(ADPLLJ_TENABLEDIV_ENB, &adpll->tenablediv);
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writel(~ADPLLJ_TENABLEDIV_ENB, &adpll->tenablediv);
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/* Load M, N dividers of ADPLL */
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writel(ADPLLJ_TENABLE_ENB, &adpll->tenable);
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writel(~ADPLLJ_TENABLE_ENB, &adpll->tenable);
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/* Configure CLKDCOLDOEN,CLKOUTLDOEN,CLKOUT Enable BITS */
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read_clkctrl = readl(&adpll->clkctrl) & ~ADPLLJ_CLKCTRL_CLKDCO;
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if (adpllj)
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writel((read_clkctrl | ADPLLJ_CLKCTRL_CLKDCO),
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&adpll->clkctrl);
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/* Enable TINTZ and disable IDLE(PLL in Active & Locked Mode */
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read_clkctrl = readl(&adpll->clkctrl) & ~ADPLLJ_CLKCTRL_IDLE;
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writel((read_clkctrl | ADPLLJ_CLKCTRL_TINITZ), &adpll->clkctrl);
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/* Wait for phase and freq lock */
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while ((readl(&adpll->status) & ADPLLJ_STATUS_PHSFRQLOCK) !=
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ADPLLJ_STATUS_PHSFRQLOCK)
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;
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}
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static void unlock_pll_control_mmr(void)
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{
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/* TRM 2.10.1.4 and 3.2.7-3.2.11 */
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writel(0x1EDA4C3D, 0x481C5040);
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writel(0x2FF1AC2B, 0x48140060);
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writel(0xF757FDC0, 0x48140064);
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writel(0xE2BC3A6D, 0x48140068);
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writel(0x1EBF131D, 0x4814006c);
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writel(0x6F361E05, 0x48140070);
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}
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static void mpu_pll_config(void)
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{
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pll_config(MPU_PLL_BASE, MPU_N, MPU_M, MPU_M2, MPU_CLKCTRL, 0);
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}
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static void l3_pll_config(void)
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{
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u32 l3_osc_src, rd_osc_src = 0;
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l3_osc_src = L3_OSC_SRC;
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rd_osc_src = readl(OSC_SRC_CTRL);
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if (OSC_SRC0 == l3_osc_src)
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writel((rd_osc_src & 0xfffffffe)|0x0, OSC_SRC_CTRL);
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else
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writel((rd_osc_src & 0xfffffffe)|0x1, OSC_SRC_CTRL);
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pll_config(L3_PLL_BASE, L3_N, L3_M, L3_M2, L3_CLKCTRL, 1);
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}
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void ddr_pll_config(unsigned int ddrpll_m)
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{
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pll_config(DDR_PLL_BASE, DDR_N, DDR_M, DDR_M2, DDR_CLKCTRL, 1);
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}
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void sata_pll_config(void)
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{
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/*
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* This sequence for configuring the SATA PLL
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* resident in the control module is documented
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* in TI8148 TRM section 21.3.1
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*/
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writel(SATA_PLLCFG1, &spll->pllcfg1);
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udelay(50);
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writel(SATA_PLLCFG3, &spll->pllcfg3);
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udelay(50);
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writel(SATA_PLLCFG0_1, &spll->pllcfg0);
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udelay(50);
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writel(SATA_PLLCFG0_2, &spll->pllcfg0);
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udelay(50);
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writel(SATA_PLLCFG0_3, &spll->pllcfg0);
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udelay(50);
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writel(SATA_PLLCFG0_4, &spll->pllcfg0);
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udelay(50);
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while (((readl(&spll->pllstatus) & PLL_LOCK) == 0))
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;
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}
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void enable_dmm_clocks(void)
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{
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writel(PRCM_MOD_EN, &cmdef->fwclkctrl);
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writel(PRCM_MOD_EN, &cmdef->l3fastclkstctrl);
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writel(PRCM_MOD_EN, &cmdef->emif0clkctrl);
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while ((readl(&cmdef->emif0clkctrl)) != PRCM_MOD_EN)
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;
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writel(PRCM_MOD_EN, &cmdef->emif1clkctrl);
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while ((readl(&cmdef->emif1clkctrl)) != PRCM_MOD_EN)
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;
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while ((readl(&cmdef->l3fastclkstctrl) & 0x300) != 0x300)
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;
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writel(PRCM_MOD_EN, &cmdef->dmmclkctrl);
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while ((readl(&cmdef->dmmclkctrl)) != PRCM_MOD_EN)
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;
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writel(PRCM_MOD_EN, &cmalwon->l3slowclkstctrl);
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while ((readl(&cmalwon->l3slowclkstctrl) & 0x2100) != 0x2100)
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;
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}
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void setup_clocks_for_console(void)
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{
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unlock_pll_control_mmr();
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/* UART0 */
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writel(PRCM_MOD_EN, &cmalwon->uart0clkctrl);
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while (readl(&cmalwon->uart0clkctrl) != PRCM_MOD_EN)
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;
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}
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void setup_early_clocks(void)
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{
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setup_clocks_for_console();
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}
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/*
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* Configure the PLL/PRCM for necessary peripherals
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*/
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void prcm_init(void)
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{
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/* Enable the control module */
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writel(PRCM_MOD_EN, &cmalwon->controlclkctrl);
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/* Configure PLLs */
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mpu_pll_config();
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l3_pll_config();
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sata_pll_config();
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/* Enable the required peripherals */
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enable_per_clocks();
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}
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