diff options
Diffstat (limited to '')
| -rw-r--r-- | plat/mediatek/mt8186/drivers/rtc/rtc.c | 133 | ||||
| -rw-r--r-- | plat/mediatek/mt8186/drivers/rtc/rtc.h | 145 |
2 files changed, 278 insertions, 0 deletions
diff --git a/plat/mediatek/mt8186/drivers/rtc/rtc.c b/plat/mediatek/mt8186/drivers/rtc/rtc.c new file mode 100644 index 0000000..4fcf58e --- /dev/null +++ b/plat/mediatek/mt8186/drivers/rtc/rtc.c @@ -0,0 +1,133 @@ +/* + * Copyright (c) 2021, MediaTek Inc. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <common/debug.h> +#include <drivers/delay_timer.h> +#include <rtc.h> + +static void RTC_Config_Interface(uint32_t addr, uint16_t data, + uint16_t MASK, uint16_t SHIFT) +{ + uint16_t pmic_reg = 0; + + pmic_reg = RTC_Read(addr); + + pmic_reg &= ~(MASK << SHIFT); + pmic_reg |= (data << SHIFT); + + RTC_Write(addr, pmic_reg); +} + +static void rtc_disable_2sec_reboot(void) +{ + uint16_t reboot; + + reboot = (RTC_Read(RTC_AL_SEC) & ~RTC_BBPU_2SEC_EN) & + ~RTC_BBPU_AUTO_PDN_SEL; + RTC_Write(RTC_AL_SEC, reboot); + RTC_Write_Trigger(); +} + +static void rtc_xosc_write(uint16_t val, bool reload) +{ + uint16_t bbpu; + + RTC_Write(RTC_OSC32CON, RTC_OSC32CON_UNLOCK1); + rtc_busy_wait(); + RTC_Write(RTC_OSC32CON, RTC_OSC32CON_UNLOCK2); + rtc_busy_wait(); + + RTC_Write(RTC_OSC32CON, val); + rtc_busy_wait(); + + if (reload) { + bbpu = RTC_Read(RTC_BBPU) | RTC_BBPU_KEY | RTC_BBPU_RELOAD; + RTC_Write(RTC_BBPU, bbpu); + RTC_Write_Trigger(); + } +} + +static void rtc_enable_k_eosc(void) +{ + uint16_t osc32; + uint16_t rtc_eosc_cali_td = 8; /* eosc cali period time */ + + /* Truning on eosc cali mode clock */ + RTC_Config_Interface(PMIC_RG_TOP_CON, 1, + PMIC_RG_SRCLKEN_IN0_HW_MODE_MASK, + PMIC_RG_SRCLKEN_IN0_HW_MODE_SHIFT); + RTC_Config_Interface(PMIC_RG_TOP_CON, 1, + PMIC_RG_SRCLKEN_IN1_HW_MODE_MASK, + PMIC_RG_SRCLKEN_IN1_HW_MODE_SHIFT); + RTC_Config_Interface(PMIC_RG_SCK_TOP_CKPDN_CON0, 0, + PMIC_RG_RTC_EOSC32_CK_PDN_MASK, + PMIC_RG_RTC_EOSC32_CK_PDN_SHIFT); + + switch (rtc_eosc_cali_td) { + case 1: + RTC_Config_Interface(PMIC_RG_EOSC_CALI_CON0, 0x3, + PMIC_RG_EOSC_CALI_TD_MASK, PMIC_RG_EOSC_CALI_TD_SHIFT); + break; + case 2: + RTC_Config_Interface(PMIC_RG_EOSC_CALI_CON0, 0x4, + PMIC_RG_EOSC_CALI_TD_MASK, PMIC_RG_EOSC_CALI_TD_SHIFT); + break; + case 4: + RTC_Config_Interface(PMIC_RG_EOSC_CALI_CON0, 0x5, + PMIC_RG_EOSC_CALI_TD_MASK, PMIC_RG_EOSC_CALI_TD_SHIFT); + break; + case 16: + RTC_Config_Interface(PMIC_RG_EOSC_CALI_CON0, 0x7, + PMIC_RG_EOSC_CALI_TD_MASK, PMIC_RG_EOSC_CALI_TD_SHIFT); + break; + default: + RTC_Config_Interface(PMIC_RG_EOSC_CALI_CON0, 0x6, + PMIC_RG_EOSC_CALI_TD_MASK, PMIC_RG_EOSC_CALI_TD_SHIFT); + break; + } + /* Switch the DCXO from 32k-less mode to RTC mode, + * otherwise, EOSC cali will fail + */ + /* RTC mode will have only OFF mode and FPM */ + RTC_Config_Interface(PMIC_RG_DCXO_CW02, 0, PMIC_RG_XO_EN32K_MAN_MASK, + PMIC_RG_XO_EN32K_MAN_SHIFT); + RTC_Write(RTC_BBPU, + RTC_Read(RTC_BBPU) | RTC_BBPU_KEY | RTC_BBPU_RELOAD); + RTC_Write_Trigger(); + /* Enable K EOSC mode for normal power off and then plug out battery */ + RTC_Write(RTC_AL_YEA, ((RTC_Read(RTC_AL_YEA) | RTC_K_EOSC_RSV_0) + & (~RTC_K_EOSC_RSV_1)) | RTC_K_EOSC_RSV_2); + RTC_Write_Trigger(); + + osc32 = RTC_Read(RTC_OSC32CON); + rtc_xosc_write(osc32 | RTC_EMBCK_SRC_SEL, true); + INFO("[RTC] RTC_enable_k_eosc\n"); +} + +void rtc_power_off_sequence(void) +{ + uint16_t bbpu; + + rtc_disable_2sec_reboot(); + rtc_enable_k_eosc(); + + /* clear alarm */ + bbpu = RTC_BBPU_KEY | RTC_BBPU_CLR | RTC_BBPU_PWREN; + if (Writeif_unlock()) { + RTC_Write(RTC_BBPU, bbpu); + + RTC_Write(RTC_AL_MASK, RTC_AL_MASK_DOW); + RTC_Write_Trigger(); + mdelay(1); + + bbpu = RTC_Read(RTC_BBPU) | RTC_BBPU_KEY | RTC_BBPU_RELOAD; + RTC_Write(RTC_BBPU, bbpu); + RTC_Write_Trigger(); + INFO("[RTC] BBPU=0x%x, IRQ_EN=0x%x, AL_MSK=0x%x, AL_SEC=0x%x\n", + RTC_Read(RTC_BBPU), RTC_Read(RTC_IRQ_EN), + RTC_Read(RTC_AL_MASK), RTC_Read(RTC_AL_SEC)); + } +} diff --git a/plat/mediatek/mt8186/drivers/rtc/rtc.h b/plat/mediatek/mt8186/drivers/rtc/rtc.h new file mode 100644 index 0000000..b48dbb9 --- /dev/null +++ b/plat/mediatek/mt8186/drivers/rtc/rtc.h @@ -0,0 +1,145 @@ +/* + * Copyright (c) 2021, MediaTek Inc. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef RTC_H +#define RTC_H + +#define PMIC_RG_SRCLKEN_IN0_HW_MODE_MASK (1U) +#define PMIC_RG_SRCLKEN_IN0_HW_MODE_SHIFT (1U) +#define PMIC_RG_SRCLKEN_IN1_HW_MODE_MASK (1U) +#define PMIC_RG_SRCLKEN_IN1_HW_MODE_SHIFT (3U) +#define PMIC_RG_RTC_EOSC32_CK_PDN_MASK (1U) +#define PMIC_RG_RTC_EOSC32_CK_PDN_SHIFT (2U) +#define PMIC_RG_EOSC_CALI_TD_MASK (7U) +#define PMIC_RG_EOSC_CALI_TD_SHIFT (5U) +#define PMIC_RG_XO_EN32K_MAN_MASK (1U) +#define PMIC_RG_XO_EN32K_MAN_SHIFT (0U) + +/* RTC registers */ +enum { + RTC_BBPU = 0x0588, + RTC_IRQ_STA = 0x058A, + RTC_IRQ_EN = 0x058C, + RTC_CII_EN = 0x058E +}; + +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_PDN1 = 0x05B4, + RTC_PDN2 = 0x05B6, + RTC_SPAR0 = 0x05B8, + RTC_SPAR1 = 0x05BA, + RTC_PROT = 0x05BC, + RTC_DIFF = 0x05BE, + RTC_CALI = 0x05C0 +}; + +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_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 +}; + +enum { + RTC_AL_MASK_SEC = 1U << 0, + RTC_AL_MASK_MIN = 1U << 1, + RTC_AL_MASK_HOU = 1U << 2, + RTC_AL_MASK_DOM = 1U << 3, + RTC_AL_MASK_DOW = 1U << 4, + RTC_AL_MASK_MTH = 1U << 5, + RTC_AL_MASK_YEA = 1U << 6 +}; + +enum { + RTC_BBPU_AUTO_PDN_SEL = 1U << 6, + RTC_BBPU_2SEC_CK_SEL = 1U << 7, + RTC_BBPU_2SEC_EN = 1U << 8, + RTC_BBPU_2SEC_MODE = 0x3 << 9, + RTC_BBPU_2SEC_STAT_CLEAR = 1U << 11, + RTC_BBPU_2SEC_STAT_STA = 1U << 12 +}; + +enum { + RTC_BBPU_KEY = 0x43 << 8 +}; + +enum { + RTC_EMBCK_SRC_SEL = 1 << 8, + RTC_EMBCK_SEL_MODE = 3 << 6, + RTC_XOSC32_ENB = 1 << 5, + RTC_REG_XOSC32_ENB = 1 << 15 +}; + +enum { + RTC_K_EOSC_RSV_0 = 1 << 8, + RTC_K_EOSC_RSV_1 = 1 << 9, + RTC_K_EOSC_RSV_2 = 1 << 10 +}; + +/* PMIC TOP Register Definition */ +enum { + PMIC_RG_TOP_CON = 0x001E, + 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 SCK Register Definition */ +enum { + PMIC_RG_SCK_TOP_CKPDN_CON0 = 0x051A, + PMIC_RG_SCK_TOP_CKPDN_CON0_SET = 0x051C, + PMIC_RG_SCK_TOP_CKPDN_CON0_CLR = 0x051E, + PMIC_RG_EOSC_CALI_CON0 = 0x540 +}; + +/* PMIC DCXO Register Definition */ +enum { + PMIC_RG_DCXO_CW00 = 0x0788, + PMIC_RG_DCXO_CW02 = 0x0790 +}; + +/* external API */ +uint16_t RTC_Read(uint32_t addr); +void RTC_Write(uint32_t addr, uint16_t data); +int32_t rtc_busy_wait(void); +int32_t RTC_Write_Trigger(void); +int32_t Writeif_unlock(void); +void rtc_power_off_sequence(void); + +#endif /* RTC_H */ |