From 47d46d0a18af3ec140c07b8e3a88dd3fb53c331e Mon Sep 17 00:00:00 2001 From: Ran Bi Date: Fri, 26 Oct 2018 15:18:09 +0800 Subject: mediatek/mt8183: Add RTC support This patch implements RTC initialization. 1. initialization dcxo 2. rtc clock using dcxo 32k 3. export RTC_32K1V8_0 to SOC, export RTC_32K1V8_1 to WLAN 4. rtc register initialization 5. refactor the driver common part BUG=b:80501386 BRANCH=none TEST=Boots correctly on Kukui Change-Id: Icccb9360a507fcbfd865b107cd3630e71c810d55 Signed-off-by: Ran Bi Reviewed-on: https://review.coreboot.org/c/31046 Tested-by: build bot (Jenkins) Reviewed-by: Julius Werner --- src/soc/mediatek/common/include/soc/rtc_common.h | 105 ++++++++++ src/soc/mediatek/common/rtc.c | 194 ++++++++++++++++++ src/soc/mediatek/mt8173/Makefile.inc | 4 +- src/soc/mediatek/mt8173/include/soc/rtc.h | 74 +------ src/soc/mediatek/mt8173/rtc.c | 197 ++---------------- src/soc/mediatek/mt8183/Makefile.inc | 1 + src/soc/mediatek/mt8183/include/soc/rtc.h | 149 ++++++++++++++ src/soc/mediatek/mt8183/rtc.c | 250 +++++++++++++++++++++++ 8 files changed, 718 insertions(+), 256 deletions(-) create mode 100644 src/soc/mediatek/common/include/soc/rtc_common.h create mode 100644 src/soc/mediatek/common/rtc.c create mode 100644 src/soc/mediatek/mt8183/include/soc/rtc.h create mode 100644 src/soc/mediatek/mt8183/rtc.c (limited to 'src') diff --git a/src/soc/mediatek/common/include/soc/rtc_common.h b/src/soc/mediatek/common/include/soc/rtc_common.h new file mode 100644 index 0000000000..41e772e9ed --- /dev/null +++ b/src/soc/mediatek/common/include/soc/rtc_common.h @@ -0,0 +1,105 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2018 MediaTek Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef SOC_MEDIATEK_RTC_COMMON_H +#define SOC_MEDIATEK_RTC_COMMON_H + +#include +#include +#include +#include +#include +#include + +/* + * Default values for RTC initialization + * Year (YEA) : 1970 ~ 2037 + * Month (MTH) : 1 ~ 12 + * Day of Month (DOM): 1 ~ 31 + */ + +enum { + RTC_DEFAULT_YEA = 2010, + RTC_DEFAULT_MTH = 1, + RTC_DEFAULT_DOM = 1, + RTC_DEFAULT_DOW = 5 +}; + +enum { + RTC_2SEC_REBOOT_ENABLE = 1, + RTC_2SEC_MODE = 2 +}; + +enum { + RTC_OSC32CON_UNLOCK1 = 0x1A57, + RTC_OSC32CON_UNLOCK2 = 0x2B68 +}; + +enum { + RTC_PROT_UNLOCK1 = 0x586A, + RTC_PROT_UNLOCK2 = 0x9136 +}; + +enum { + RTC_BBPU_KEY = 0x43 << 8 +}; + +enum { + RTC_IRQ_STA_AL = 1U << 0, + RTC_IRQ_STA_TC = 1U << 1, + RTC_IRQ_STA_LP = 1U << 3 +}; + +enum { + RTC_IRQ_EN_AL = 1U << 0, + RTC_IRQ_EN_TC = 1U << 1, + RTC_IRQ_EN_ONESHOT = 1U << 2, + RTC_IRQ_EN_LP = 1U << 3, + RTC_IRQ_EN_ONESHOT_AL = RTC_IRQ_EN_ONESHOT | RTC_IRQ_EN_AL +}; + +enum { + RTC_POWERKEY1_KEY = 0xA357, + RTC_POWERKEY2_KEY = 0x67D2 +}; + +enum { + RTC_SPAR0_32K_LESS = 1U << 6 +}; + +enum { + RTC_MIN_YEAR = 1968, + RTC_BASE_YEAR = 1900, + RTC_MIN_YEAR_OFFSET = RTC_MIN_YEAR - RTC_BASE_YEAR, + + RTC_NUM_YEARS = 128 +}; + +enum { + RTC_STATE_REBOOT = 0, + RTC_STATE_RECOVER = 1, + RTC_STATE_INIT = 2 +}; + +/* external API */ +int rtc_busy_wait(void); +int rtc_write_trigger(void); +int rtc_writeif_unlock(void); +void rtc_xosc_write(u16 val); +int rtc_reg_init(void); +u8 rtc_check_state(void); +void rtc_boot_common(void); + +#endif /* SOC_MEDIATEK_RTC_COMMON_H */ diff --git a/src/soc/mediatek/common/rtc.c b/src/soc/mediatek/common/rtc.c new file mode 100644 index 0000000000..fd40cb5d1a --- /dev/null +++ b/src/soc/mediatek/common/rtc.c @@ -0,0 +1,194 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2018 MediaTek Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include + +/* ensure rtc write success */ +int rtc_busy_wait(void) +{ + struct stopwatch sw; + u16 bbpu; + + stopwatch_init_usecs_expire(&sw, RTC_CBUSY_TIMEOUT_US); + + do { + pwrap_read(RTC_BBPU, &bbpu); + /* Time > 1sec, time out and set recovery mode enable.*/ + if (stopwatch_expired(&sw)) { + printk(BIOS_INFO, "[RTC] BBPU CBUSY time out !!\n"); + return 0; + } + } while (bbpu & RTC_BBPU_CBUSY); + + return 1; +} + +int rtc_write_trigger(void) +{ + pwrap_write(RTC_WRTGR, 1); + return rtc_busy_wait(); +} + +/* unlock rtc write interface */ +int rtc_writeif_unlock(void) +{ + pwrap_write(RTC_PROT, RTC_PROT_UNLOCK1); + if (!rtc_write_trigger()) + return 0; + pwrap_write(RTC_PROT, RTC_PROT_UNLOCK2); + if (!rtc_write_trigger()) + return 0; + + return 1; +} + +/* set rtc time */ +int rtc_set(const struct rtc_time *time) +{ + return -1; +} + +/* get rtc time */ +int rtc_get(struct rtc_time *time) +{ + u16 value; + + pwrap_read(RTC_TC_SEC, &value); + time->sec = value; + pwrap_read(RTC_TC_MIN, &value); + time->min = value; + pwrap_read(RTC_TC_HOU, &value); + time->hour = value; + pwrap_read(RTC_TC_DOM, &value); + time->mday = value; + pwrap_read(RTC_TC_MTH, &value); + time->mon = value; + pwrap_read(RTC_TC_YEA, &value); + time->year = (value + RTC_MIN_YEAR_OFFSET) % 100; + + return 0; +} + +/* set rtc xosc setting */ +void rtc_xosc_write(u16 val) +{ + u16 bbpu; + + pwrap_write(RTC_OSC32CON, RTC_OSC32CON_UNLOCK1); + udelay(200); + pwrap_write(RTC_OSC32CON, RTC_OSC32CON_UNLOCK2); + udelay(200); + + pwrap_write(RTC_OSC32CON, val); + udelay(200); + + pwrap_read(RTC_BBPU, &bbpu); + bbpu |= RTC_BBPU_KEY | RTC_BBPU_RELOAD; + pwrap_write(RTC_BBPU, bbpu); + rtc_write_trigger(); +} + +/* initialize rtc related registers */ +int rtc_reg_init(void) +{ + u16 irqsta; + + pwrap_write(RTC_IRQ_EN, 0); + pwrap_write(RTC_CII_EN, 0); + pwrap_write(RTC_AL_MASK, 0); + pwrap_write(RTC_AL_YEA, 1970 - RTC_MIN_YEAR); + pwrap_write(RTC_AL_MTH, 1); + pwrap_write(RTC_AL_DOM, 1); + pwrap_write(RTC_AL_DOW, 4); + pwrap_write(RTC_AL_HOU, 0); + pwrap_write(RTC_AL_MIN, 0); + pwrap_write(RTC_AL_SEC, 0); + + pwrap_write(RTC_DIFF, 0); + pwrap_write(RTC_CALI, 0); + if (!rtc_write_trigger()) + return 0; + + pwrap_read(RTC_IRQ_STA, &irqsta); /* read clear */ + + /* init time counters after resetting RTC_DIFF and RTC_CALI */ + pwrap_write(RTC_TC_YEA, RTC_DEFAULT_YEA - RTC_MIN_YEAR); + pwrap_write(RTC_TC_MTH, RTC_DEFAULT_MTH); + pwrap_write(RTC_TC_DOM, RTC_DEFAULT_DOM); + pwrap_write(RTC_TC_DOW, RTC_DEFAULT_DOW); + pwrap_write(RTC_TC_HOU, 0); + pwrap_write(RTC_TC_MIN, 0); + pwrap_write(RTC_TC_SEC, 0); + + return rtc_write_trigger(); +} + +u8 rtc_check_state(void) +{ + u16 con; + u16 pwrky1; + u16 pwrky2; + + pwrap_read(RTC_CON, &con); + pwrap_read(RTC_POWERKEY1, &pwrky1); + pwrap_read(RTC_POWERKEY2, &pwrky2); + + if (con & RTC_CON_LPSTA_RAW) + return RTC_STATE_INIT; + + if (!rtc_busy_wait()) + return RTC_STATE_RECOVER; + + if (!rtc_writeif_unlock()) + return RTC_STATE_RECOVER; + + if (pwrky1 != RTC_POWERKEY1_KEY || pwrky2 != RTC_POWERKEY2_KEY) + return RTC_STATE_INIT; + else + return RTC_STATE_REBOOT; +} + +void rtc_boot_common(void) +{ + u16 bbpu; + u16 con; + u16 irqsta; + + switch (rtc_check_state()) { + case RTC_STATE_REBOOT: + pwrap_write_field(RTC_BBPU, RTC_BBPU_KEY | RTC_BBPU_RELOAD, + 0xFFFF, 0); + rtc_write_trigger(); + rtc_osc_init(); + break; + case RTC_STATE_RECOVER: + rtc_init(1); + break; + case RTC_STATE_INIT: + default: + if (!rtc_init(0)) + rtc_init(1); + break; + } + + pwrap_read(RTC_IRQ_STA, &irqsta); /* Read clear */ + pwrap_read(RTC_BBPU, &bbpu); + pwrap_read(RTC_CON, &con); + + printk(BIOS_INFO, "[RTC] irqsta = %x", irqsta); + printk(BIOS_INFO, " bbpu = %#x, con = %#x\n", bbpu, con); +} diff --git a/src/soc/mediatek/mt8173/Makefile.inc b/src/soc/mediatek/mt8173/Makefile.inc index 4ccc218e4d..0ffa1965a9 100644 --- a/src/soc/mediatek/mt8173/Makefile.inc +++ b/src/soc/mediatek/mt8173/Makefile.inc @@ -60,7 +60,7 @@ romstage-y += memory.c romstage-y += emi.c dramc_pi_basic_api.c dramc_pi_calibration_api.c romstage-$(CONFIG_MEMORY_TEST) += ../common/memory_test.c romstage-y += ../common/mmu_operations.c mmu_operations.c -romstage-y += rtc.c +romstage-y += ../common/rtc.c rtc.c ################################################################################ @@ -77,7 +77,7 @@ ramstage-y += da9212.c ramstage-y += ../common/gpio.c gpio.c ramstage-y += ../common/wdt.c ../common/reset.c ramstage-y += ../common/pll.c pll.c -ramstage-y += rtc.c +ramstage-y += ../common/rtc.c rtc.c ramstage-y += ../common/usb.c usb.c diff --git a/src/soc/mediatek/mt8173/include/soc/rtc.h b/src/soc/mediatek/mt8173/include/soc/rtc.h index dd3546a13c..fe5cbac277 100644 --- a/src/soc/mediatek/mt8173/include/soc/rtc.h +++ b/src/soc/mediatek/mt8173/include/soc/rtc.h @@ -16,28 +16,10 @@ #ifndef SOC_MEDIATEK_MT8173_RTC_H #define SOC_MEDIATEK_MT8173_RTC_H +#include #include #include "mt6391.h" -/* - * Default values for RTC initialization - * Year (YEA) : 1970 ~ 2037 - * Month (MTH) : 1 ~ 12 - * Day of Month (DOM): 1 ~ 31 - */ - -enum { - RTC_DEFAULT_YEA = 2010, - RTC_DEFAULT_MTH = 1, - RTC_DEFAULT_DOM = 1, - RTC_DEFAULT_DOW = 5 -}; - -enum { - RTC_2SEC_REBOOT_ENABLE = 1, - RTC_2SEC_MODE = 2 -}; - /* RTC registers */ enum { RTC_BBPU = 0xE000, @@ -88,16 +70,6 @@ enum { RTC_CALI = 0xE03A }; -enum { - RTC_OSC32CON_UNLOCK1 = 0x1A57, - RTC_OSC32CON_UNLOCK2 = 0x2B68 -}; - -enum { - RTC_PROT_UNLOCK1 = 0x586A, - RTC_PROT_UNLOCK2 = 0x9136 -}; - enum { RTC_BBPU_PWREN = 1U << 0, RTC_BBPU_BBPU = 1U << 2, @@ -109,34 +81,11 @@ enum { RTC_CBUSY_TIMEOUT_US = 800 }; -enum { - RTC_BBPU_KEY = 0x43 << 8 -}; - -enum { - RTC_IRQ_STA_AL = 1U << 0, - RTC_IRQ_STA_TC = 1U << 1, - RTC_IRQ_STA_LP = 1U << 3 -}; - -enum { - RTC_IRQ_EN_AL = 1U << 0, - RTC_IRQ_EN_TC = 1U << 1, - RTC_IRQ_EN_ONESHOT = 1U << 2, - RTC_IRQ_EN_LP = 1U << 3, - RTC_IRQ_EN_ONESHOT_AL = RTC_IRQ_EN_ONESHOT | RTC_IRQ_EN_AL -}; - enum { RTC_OSC32CON_AMPEN = 1U << 8, RTC_OSC32CON_LNBUFEN = 1U << 11 }; -enum { - RTC_POWERKEY1_KEY = 0xa357, - RTC_POWERKEY2_KEY = 0x67d2 -}; - enum { RTC_CON_LPEN = 1U << 2, RTC_CON_LPRST = 1U << 3, @@ -161,24 +110,9 @@ enum { RTC_CALI_BBPU_2SEC_STAT = 1U << 11 }; -enum { - RTC_SPAR0_32K_LESS = 1U << 6 -}; - -enum { - RTC_MIN_YEAR = 1968, - RTC_BASE_YEAR = 1900, - RTC_MIN_YEAR_OFFSET = RTC_MIN_YEAR - RTC_BASE_YEAR, - - RTC_NUM_YEARS = 128 -}; - -enum { - RTC_STATE_REBOOT = 0, - RTC_STATE_RECOVER = 1, - RTC_STATE_INIT = 2 -}; - +/* external API */ +void rtc_osc_init(void); +int rtc_init(u8 recover); void rtc_boot(void); #endif /* SOC_MEDIATEK_MT8173_RTC_H */ diff --git a/src/soc/mediatek/mt8173/rtc.c b/src/soc/mediatek/mt8173/rtc.c index 153e9b4249..5b7d486d87 100644 --- a/src/soc/mediatek/mt8173/rtc.c +++ b/src/soc/mediatek/mt8173/rtc.c @@ -13,133 +13,13 @@ * GNU General Public License for more details. */ -#include -#include -#include -#include -#include -#include - +#include +#include #include #include -#include #define RTC_GPIO_USER_MASK ((1 << 13) - (1 << 8)) -/* ensure rtc write success */ -static inline int rtc_busy_wait(void) -{ - struct stopwatch sw; - u16 bbpu; - - stopwatch_init_usecs_expire(&sw, RTC_CBUSY_TIMEOUT_US); - - do { - pwrap_read(RTC_BBPU, &bbpu); - /* Time > 1sec, time out and set recovery mode enable.*/ - if (stopwatch_expired(&sw)) { - printk(BIOS_INFO, "[RTC] BBPU CBUSY time out !!\n"); - return 0; - } - } while (bbpu & RTC_BBPU_CBUSY); - - return 1; -} - -static int write_trigger(void) -{ - pwrap_write(RTC_WRTGR, 1); - return rtc_busy_wait(); -} - -/* unlock rtc write interface */ -static int writeif_unlock(void) -{ - pwrap_write(RTC_PROT, RTC_PROT_UNLOCK1); - if (!write_trigger()) - return 0; - pwrap_write(RTC_PROT, RTC_PROT_UNLOCK2); - if (!write_trigger()) - return 0; - - return 1; -} - -/* set rtc time */ -int rtc_set(const struct rtc_time *time) -{ - return -1; -} - -/* get rtc time */ -int rtc_get(struct rtc_time *time) -{ - u16 value; - - pwrap_read(RTC_TC_SEC, &value); - time->sec = value; - pwrap_read(RTC_TC_MIN, &value); - time->min = value; - pwrap_read(RTC_TC_HOU, &value); - time->hour = value; - pwrap_read(RTC_TC_DOM, &value); - time->mday = value; - pwrap_read(RTC_TC_MTH, &value); - time->mon = value; - pwrap_read(RTC_TC_YEA, &value); - time->year = (value + RTC_MIN_YEAR_OFFSET) % 100; - - return 0; -} - -/* set rtc xosc setting */ -static void rtc_xosc_write(u16 val) -{ - pwrap_write(RTC_OSC32CON, RTC_OSC32CON_UNLOCK1); - udelay(200); - pwrap_write(RTC_OSC32CON, RTC_OSC32CON_UNLOCK2); - udelay(200); - - pwrap_write(RTC_OSC32CON, val); - udelay(200); - pwrap_write_field(RTC_BBPU, RTC_BBPU_KEY | RTC_BBPU_RELOAD, 0, 0); - write_trigger(); -} - -/* initialize rtc related registers */ -static int rtc_reg_init(void) -{ - u16 irqsta; - - pwrap_write(RTC_IRQ_EN, 0); - pwrap_write(RTC_CII_EN, 0); - pwrap_write(RTC_AL_MASK, 0); - pwrap_write(RTC_AL_YEA, 1970 - RTC_MIN_YEAR); - pwrap_write(RTC_AL_MTH, 1); - pwrap_write(RTC_AL_DOM, 1); - pwrap_write(RTC_AL_DOW, 4); - pwrap_write(RTC_AL_HOU, 0); - pwrap_write(RTC_AL_MIN, 0); - pwrap_write(RTC_AL_SEC, 0); - - pwrap_write(RTC_DIFF, 0); - pwrap_write(RTC_CALI, 0); - if (!write_trigger()) - return 0; - - pwrap_read(RTC_IRQ_STA, &irqsta); /* read clear */ - - /* init time counters after resetting RTC_DIFF and RTC_CALI */ - pwrap_write(RTC_TC_YEA, RTC_DEFAULT_YEA - RTC_MIN_YEAR); - pwrap_write(RTC_TC_MTH, RTC_DEFAULT_MTH); - pwrap_write(RTC_TC_DOM, RTC_DEFAULT_DOM); - pwrap_write(RTC_TC_DOW, RTC_DEFAULT_DOW); - pwrap_write(RTC_TC_HOU, 0); - pwrap_write(RTC_TC_MIN, 0); - pwrap_write(RTC_TC_SEC, 0); - - return write_trigger(); -} /* initialize rtc related gpio */ static int rtc_gpio_init(void) @@ -155,11 +35,11 @@ static int rtc_gpio_init(void) con |= (RTC_CON_GPEN | RTC_CON_GOE); con &= ~(RTC_CON_F32KOB); pwrap_write(RTC_CON, con); - return write_trigger(); + return rtc_write_trigger(); } /* set xosc mode */ -static void rtc_osc_init(void) +void rtc_osc_init(void) { u16 con; @@ -176,26 +56,26 @@ static void rtc_osc_init(void) static int rtc_lpd_init(void) { pwrap_write_field(RTC_CON, RTC_CON_LPEN, RTC_CON_LPRST, 0); - if (!write_trigger()) + if (!rtc_write_trigger()) return 0; pwrap_write_field(RTC_CON, RTC_CON_LPRST, 0, 0); - if (!write_trigger()) + if (!rtc_write_trigger()) return 0; pwrap_write_field(RTC_CON, 0, RTC_CON_LPRST, 0); - if (!write_trigger()) + if (!rtc_write_trigger()) return 0; return 1; } /* rtc init check */ -static int rtc_init(u8 recover) +int rtc_init(u8 recover) { printk(BIOS_INFO, "[RTC] %s recovery: %d\n", __func__, recover); - if (!writeif_unlock()) + if (!rtc_writeif_unlock()) return 0; if (!rtc_gpio_init()) @@ -213,7 +93,7 @@ static int rtc_init(u8 recover) /* write powerkeys */ pwrap_write(RTC_POWERKEY1, RTC_POWERKEY1_KEY); pwrap_write(RTC_POWERKEY2, RTC_POWERKEY2_KEY); - if (!write_trigger()) + if (!rtc_write_trigger()) return 0; if (recover) @@ -238,8 +118,8 @@ static void rtc_bbpu_power_on(void) /* pull PWRBB high */ bbpu = RTC_BBPU_KEY | RTC_BBPU_AUTO | RTC_BBPU_BBPU | RTC_BBPU_PWREN; pwrap_write(RTC_BBPU, bbpu); - ret = write_trigger(); - printk(BIOS_INFO, "[RTC] %s write_trigger=%d\n", __func__, ret); + ret = rtc_write_trigger(); + printk(BIOS_INFO, "[RTC] %s rtc_write_trigger=%d\n", __func__, ret); /* enable DCXO to transform external 32KHz clock to 26MHz clock directly sent to SoC */ @@ -256,63 +136,12 @@ static void rtc_bbpu_power_on(void) pwrap_write_field(PMIC_RG_TOP_CKPDN2, 0x1, 0, 14); } -static u8 rtc_check_state(void) -{ - u16 con; - u16 pwrky1; - u16 pwrky2; - - pwrap_read(RTC_CON, &con); - pwrap_read(RTC_POWERKEY1, &pwrky1); - pwrap_read(RTC_POWERKEY2, &pwrky2); - - if (con & RTC_CON_LPSTA_RAW) - return RTC_STATE_INIT; - - if (!rtc_busy_wait()) - return RTC_STATE_RECOVER; - - if (!writeif_unlock()) - return RTC_STATE_RECOVER; - - if (pwrky1 != RTC_POWERKEY1_KEY || pwrky2 != RTC_POWERKEY2_KEY) - return RTC_STATE_INIT; - else - return RTC_STATE_REBOOT; -} - /* the rtc boot flow entry */ void rtc_boot(void) { - u16 bbpu; - u16 con; - u16 irqsta; - pwrap_write(PMIC_RG_TOP_CKPDN, 0); pwrap_write(PMIC_RG_TOP_CKPDN2, 0); - switch (rtc_check_state()) { - case RTC_STATE_REBOOT: - pwrap_write_field(RTC_BBPU, RTC_BBPU_KEY | RTC_BBPU_RELOAD, 0, - 0); - write_trigger(); - rtc_osc_init(); - break; - case RTC_STATE_RECOVER: - rtc_init(1); - break; - case RTC_STATE_INIT: - default: - if (!rtc_init(0)) - rtc_init(1); - break; - } - - pwrap_read(RTC_IRQ_STA, &irqsta); /* Read clear */ - pwrap_read(RTC_BBPU, &bbpu); - pwrap_read(RTC_CON, &con); - - printk(BIOS_INFO, "[RTC] irqsta = %x", irqsta); - printk(BIOS_INFO, " bbpu = %#x, con = %#x\n", bbpu, con); + rtc_boot_common(); rtc_bbpu_power_on(); } diff --git a/src/soc/mediatek/mt8183/Makefile.inc b/src/soc/mediatek/mt8183/Makefile.inc index 5770a83d06..3fce0a81fd 100644 --- a/src/soc/mediatek/mt8183/Makefile.inc +++ b/src/soc/mediatek/mt8183/Makefile.inc @@ -33,6 +33,7 @@ romstage-y += mt8183.c romstage-y += ../common/gpio.c gpio.c romstage-y += ../common/mmu_operations.c mmu_operations.c romstage-y += ../common/pmic_wrap.c pmic_wrap.c mt6358.c +romstage-y += ../common/rtc.c rtc.c romstage-$(CONFIG_SPI_FLASH) += ../common/spi.c spi.c romstage-y += ../common/timer.c romstage-y += ../common/uart.c diff --git a/src/soc/mediatek/mt8183/include/soc/rtc.h b/src/soc/mediatek/mt8183/include/soc/rtc.h new file mode 100644 index 0000000000..65604a13c2 --- /dev/null +++ b/src/soc/mediatek/mt8183/include/soc/rtc.h @@ -0,0 +1,149 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2018 MediaTek Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef SOC_MEDIATEK_MT8183_RTC_H +#define SOC_MEDIATEK_MT8183_RTC_H + +#include +#include + +/* RTC registers */ +enum { + RTC_BBPU = 0x0588, + RTC_IRQ_STA = 0x058A, + RTC_IRQ_EN = 0x058C, + RTC_CII_EN = 0x058E +}; + +enum { + RTC_TC_SEC = 0x0592, + RTC_TC_MIN = 0x0594, + RTC_TC_HOU = 0x0596, + RTC_TC_DOM = 0x0598, + RTC_TC_DOW = 0x059A, + RTC_TC_MTH = 0x059C, + RTC_TC_YEA = 0x059E +}; + +enum { + RTC_AL_SEC = 0x05A0, + RTC_AL_MIN = 0x05A2, + RTC_AL_HOU = 0x05A4, + RTC_AL_DOM = 0x05A6, + RTC_AL_DOW = 0x05A8, + RTC_AL_MTH = 0x05AA, + RTC_AL_YEA = 0x05AC, + RTC_AL_MASK = 0x0590 +}; + +enum { + RTC_OSC32CON = 0x05AE, + RTC_CON = 0x05C4, + RTC_WRTGR = 0x05C2 +}; + +enum { + RTC_POWERKEY1 = 0x05B0, + RTC_POWERKEY2 = 0x05B2 +}; + +enum { + RTC_PDN1 = 0x05B4, + RTC_PDN2 = 0x05B6, + RTC_SPAR0 = 0x05B8, + RTC_SPAR1 = 0x05BA, + RTC_PROT = 0x05BC, + RTC_DIFF = 0x05BE, + RTC_CALI = 0x05C0 +}; + +enum { + RTC_BBPU_PWREN = 1U << 0, + RTC_BBPU_CLR = 1U << 1, + RTC_BBPU_INIT = 1U << 2, + RTC_BBPU_AUTO = 1U << 3, + RTC_BBPU_CLRPKY = 1U << 4, + RTC_BBPU_RELOAD = 1U << 5, + RTC_BBPU_CBUSY = 1U << 6, + + RTC_CBUSY_TIMEOUT_US = 800 +}; + +enum { + RTC_CON_VBAT_LPSTA_RAW = 1U << 0, + RTC_CON_EOSC32_LPEN = 1U << 1, + RTC_CON_XOSC32_LPEN = 1U << 2, + RTC_CON_LPRST = 1U << 3, + RTC_CON_CDBO = 1U << 4, + RTC_CON_F32KOB = 1U << 5, + RTC_CON_GPO = 1U << 6, + RTC_CON_GOE = 1U << 7, + RTC_CON_GSR = 1U << 8, + RTC_CON_GSMT = 1U << 9, + RTC_CON_GPEN = 1U << 10, + RTC_CON_GPU = 1U << 11, + RTC_CON_GE4 = 1U << 12, + RTC_CON_GE8 = 1U << 13, + RTC_CON_GPI = 1U << 14, + RTC_CON_LPSTA_RAW = 1U << 15 +}; + +enum { + RTC_EMBCK_SRC_SEL = 1 << 8, + RTC_EMBCK_SEL_MODE = 3 << 6, + RTC_XOSC32_ENB = 1 << 5, + RTC_REG_XOSC32_ENB = 1 << 15 +}; + +/* PMIC TOP Register Definition */ +enum { + PMIC_RG_SCK_TOP_CON0 = 0x050C +}; + +/* PMIC TOP Register Definition */ +enum { + PMIC_RG_TOP_CKPDN_CON1 = 0x0112, + PMIC_RG_TOP_CKPDN_CON1_SET = 0x0114, + PMIC_RG_TOP_CKPDN_CON1_CLR = 0x0116, + PMIC_RG_TOP_CKSEL_CON0 = 0x0118, + PMIC_RG_TOP_CKSEL_CON0_SET = 0x011A, + PMIC_RG_TOP_CKSEL_CON0_CLR = 0x011C +}; + +/* PMIC DCXO Register Definition */ +enum { + PMIC_RG_DCXO_CW00 = 0x0788, + PMIC_RG_DCXO_CW02 = 0x0790, + PMIC_RG_DCXO_CW07 = 0x079A, + PMIC_RG_DCXO_CW09 = 0x079E, + PMIC_RG_DCXO_CW11 = 0x07A2, + PMIC_RG_DCXO_CW13 = 0x07AA, + PMIC_RG_DCXO_CW15 = 0x07AE, + PMIC_RG_DCXO_CW16 = 0x07B0, + PMIC_RG_DCXO_CW21 = 0x07BA, + PMIC_RG_DCXO_ELR0 = 0x07C4 +}; + +enum { + PMIC_RG_TOP_TMA_KEY = 0x03A8 +}; + +/* external API */ +void rtc_bbpu_power_on(void); +void rtc_osc_init(void); +int rtc_init(u8 recover); +void rtc_boot(void); + +#endif /* SOC_MEDIATEK_MT8183_RTC_H */ diff --git a/src/soc/mediatek/mt8183/rtc.c b/src/soc/mediatek/mt8183/rtc.c new file mode 100644 index 0000000000..64eedfb552 --- /dev/null +++ b/src/soc/mediatek/mt8183/rtc.c @@ -0,0 +1,250 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2018 MediaTek Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include + +#define RTC_GPIO_USER_MASK ((1 << 13) - (1 << 8)) + +/* initialize rtc setting of using dcxo clock */ +static void rtc_enable_dcxo(void) +{ + u16 bbpu, con, osc32con, sec; + + pwrap_read(RTC_BBPU, &bbpu); + pwrap_write(RTC_BBPU, bbpu | RTC_BBPU_KEY | RTC_BBPU_RELOAD); + rtc_write_trigger(); + + mdelay(1); + if (!rtc_writeif_unlock()) /* Unlock for reload */ + printk(BIOS_INFO, + "[RTC] %s rtc_writeif_unlock() fail\n", __func__); + + pwrap_read(RTC_OSC32CON, &osc32con); + rtc_xosc_write((osc32con & ~RTC_EMBCK_SRC_SEL) + | RTC_XOSC32_ENB | RTC_REG_XOSC32_ENB); + pwrap_read(RTC_BBPU, &bbpu); + pwrap_write(RTC_BBPU, bbpu | RTC_BBPU_KEY | RTC_BBPU_RELOAD); + rtc_write_trigger(); + + pwrap_read(RTC_CON, &con); + pwrap_read(RTC_OSC32CON, &osc32con); + pwrap_read(RTC_AL_SEC, &sec); + printk(BIOS_INFO, "[RTC] %s con = 0x%x, osc32con = 0x%x, sec = 0x%x\n", + __func__, con, osc32con, sec); +} + +/* initialize rtc related gpio */ +static int rtc_gpio_init(void) +{ + u16 con; + + /* RTC_32K1V8 clock change from 128k div 4 source + * to RTC 32k source + */ + pwrap_write_field(PMIC_RG_TOP_CKSEL_CON0_SET, 0x1, 0x1, 3); + + /* Export 32K clock RTC_32K1V8_1 */ + pwrap_write_field(PMIC_RG_TOP_CKPDN_CON1_CLR, 0x1, 0x1, 1); + + /* Export 32K clock RTC_32K2V8 */ + pwrap_read(RTC_CON, &con); + con &= (RTC_CON_LPSTA_RAW | RTC_CON_LPRST | RTC_CON_EOSC32_LPEN); + con |= (RTC_CON_GPEN | RTC_CON_GOE); + con &= ~(RTC_CON_F32KOB); + pwrap_write(RTC_CON, con); + return rtc_write_trigger(); +} + +/* set xosc mode */ +void rtc_osc_init(void) +{ + /* enable 32K export */ + rtc_gpio_init(); +} + +/* low power detect setting */ +static int rtc_lpd_init(void) +{ + u16 con; + + con = pwrap_read(RTC_CON, &con) | RTC_CON_XOSC32_LPEN; + con &= ~RTC_CON_LPRST; + pwrap_write(RTC_CON, con); + if (!rtc_write_trigger()) + return 0; + + con |= RTC_CON_LPRST; + pwrap_write(RTC_CON, con); + if (!rtc_write_trigger()) + return 0; + + con &= ~RTC_CON_LPRST; + pwrap_write(RTC_CON, con); + if (!rtc_write_trigger()) + return 0; + + con = pwrap_read(RTC_CON, &con) | RTC_CON_EOSC32_LPEN; + con &= ~RTC_CON_LPRST; + pwrap_write(RTC_CON, con); + if (!rtc_write_trigger()) + return 0; + + con |= RTC_CON_LPRST; + pwrap_write(RTC_CON, con); + if (!rtc_write_trigger()) + return 0; + + con &= ~RTC_CON_LPRST; + pwrap_write(RTC_CON, con); + if (!rtc_write_trigger()) + return 0; + + return 1; +} + +static bool rtc_hw_init(void) +{ + u16 bbpu; + + pwrap_read(RTC_BBPU, &bbpu); + pwrap_write(RTC_BBPU, bbpu | RTC_BBPU_KEY | RTC_BBPU_INIT); + rtc_write_trigger(); + + udelay(500); + + pwrap_read(RTC_BBPU, &bbpu); + pwrap_write(RTC_BBPU, bbpu | RTC_BBPU_KEY | RTC_BBPU_RELOAD); + rtc_write_trigger(); + + pwrap_read(RTC_BBPU, &bbpu); + if (bbpu & RTC_BBPU_INIT) { + printk(BIOS_INFO, "[RTC] %s:%d timeout\n", __func__, __LINE__); + return false; + } + + return true; +} + +/* rtc init check */ +int rtc_init(u8 recover) +{ + printk(BIOS_INFO, "[RTC] %s recovery: %d\n", __func__, recover); + + if (!rtc_writeif_unlock()) + return 0; + + if (!rtc_gpio_init()) + return 0; + + /* using dcxo 32K clock */ + rtc_enable_dcxo(); + + if (recover) + mdelay(20); + + /* write powerkeys */ + pwrap_write(RTC_POWERKEY1, RTC_POWERKEY1_KEY); + pwrap_write(RTC_POWERKEY2, RTC_POWERKEY2_KEY); + if (!rtc_write_trigger()) + return 0; + + if (!rtc_reg_init()) + return 0; + if (!rtc_lpd_init()) + return 0; + if (!rtc_hw_init()) + return 0; + + return 1; +} + +/* enable rtc bbpu */ +void rtc_bbpu_power_on(void) +{ + u16 bbpu; + int ret; + + /* pull powerhold high, control by pmic */ + pmic_set_power_hold(true); + + /* pull PWRBB high */ + bbpu = RTC_BBPU_KEY | RTC_BBPU_AUTO | RTC_BBPU_RELOAD | RTC_BBPU_PWREN; + pwrap_write(RTC_BBPU, bbpu); + ret = rtc_write_trigger(); + printk(BIOS_INFO, "[RTC] %s rtc_write_trigger=%d\n", __func__, ret); + + pwrap_read(RTC_BBPU, &bbpu); + printk(BIOS_INFO, "[RTC] %s done BBPU=%#x\n", __func__, bbpu); +} + +void poweroff(void) +{ + u16 bbpu; + + if (!rtc_writeif_unlock()) + printk(BIOS_INFO, + "[RTC] %s rtc_writeif_unlock() fail\n", __func__); + /* pull PWRBB low */ + bbpu = RTC_BBPU_KEY | RTC_BBPU_RELOAD | RTC_BBPU_PWREN; + pwrap_write(RTC_BBPU, bbpu); + + pmic_set_power_hold(false); + halt(); +} + +static void dcxo_init(void) +{ + /* Buffer setting */ + pwrap_write(PMIC_RG_DCXO_CW15, 0xA2AA); + pwrap_write(PMIC_RG_DCXO_CW13, 0x98E9); + pwrap_write(PMIC_RG_DCXO_CW16, 0x9855); + + /* 26M enable control */ + /* Enable clock buffer XO_SOC, XO_CEL */ + pwrap_write(PMIC_RG_DCXO_CW00, 0x4805); + pwrap_write(PMIC_RG_DCXO_CW11, 0x8000); + + /* Load thermal coefficient */ + pwrap_write(PMIC_RG_TOP_TMA_KEY, 0x9CA7); + pwrap_write(PMIC_RG_DCXO_CW21, 0x12A7); + pwrap_write(PMIC_RG_DCXO_ELR0, 0xD004); + pwrap_write(PMIC_RG_TOP_TMA_KEY, 0x0000); + + /* Adjust OSC FPM setting */ + pwrap_write(PMIC_RG_DCXO_CW07, 0x8FFE); + + /* Re-Calibrate OSC current */ + pwrap_write(PMIC_RG_DCXO_CW09, 0x008F); + udelay(100); + pwrap_write(PMIC_RG_DCXO_CW09, 0x408F); + mdelay(5); +} + +/* the rtc boot flow entry */ +void rtc_boot(void) +{ + /* dcxo clock init settings */ + dcxo_init(); + + /* dcxo 32k init settings */ + pwrap_write_field(PMIC_RG_DCXO_CW02, 0xF, 0xF, 0); + pwrap_write_field(PMIC_RG_SCK_TOP_CON0, 0x1, 0x1, 0); + + rtc_boot_common(); + rtc_bbpu_power_on(); +} -- cgit v1.2.3