diff options
Diffstat (limited to 'zephyr/drivers/cros_rtc/renesas_rtc_idt1337ag.c')
| -rw-r--r-- | zephyr/drivers/cros_rtc/renesas_rtc_idt1337ag.c | 480 |
1 files changed, 0 insertions, 480 deletions
diff --git a/zephyr/drivers/cros_rtc/renesas_rtc_idt1337ag.c b/zephyr/drivers/cros_rtc/renesas_rtc_idt1337ag.c deleted file mode 100644 index bbe76f5286..0000000000 --- a/zephyr/drivers/cros_rtc/renesas_rtc_idt1337ag.c +++ /dev/null @@ -1,480 +0,0 @@ -/* Copyright 2021 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#define DT_DRV_COMPAT renesas_rtc_idt1337ag - -#include <assert.h> -#include <device.h> -#include <drivers/cros_rtc.h> -#include <drivers/gpio.h> -#include <drivers/i2c.h> -#include <kernel.h> -#include <rtc.h> -#include <soc.h> - -#include "renesas_rtc_idt1337ag.h" - -#include <logging/log.h> -LOG_MODULE_REGISTER(cros_rtc, LOG_LEVEL_ERR); - -/* Driver config */ -struct renesas_rtc_idt1337ag_config { - const struct device *bus; - const uint16_t i2c_addr_flags; - const struct gpio_dt_spec gpio_alert; -}; - -/* Driver data */ -struct renesas_rtc_idt1337ag_data { - const struct device *dev; - struct gpio_callback gpio_cb; - cros_rtc_alarm_callback_t alarm_callback; -}; - -enum timer_type { - RTC_TIMER, - ALARM_TIMER, -}; - -/* - * type == ALARM_TIMER: Reads alarm registers SECONDS, MINUTES, HOURS, and DAYS - * type == RTC_TIMER: Reads time registers SECONDS, MINUTES, HOURS, DAYS, and - * MONTHS, YEARS - */ -static int idt1337ag_read_time_regs(const struct device *dev, - uint8_t *time_reg, enum timer_type type) -{ - const struct renesas_rtc_idt1337ag_config *const config = dev->config; - uint8_t start_reg; - uint8_t num_reg; - - if (type == ALARM_TIMER) { - start_reg = REG_SECOND_ALARM1; - num_reg = NUM_ALARM_REGS; - } else { - start_reg = REG_SECONDS; - num_reg = NUM_TIMER_REGS; - } - - return i2c_burst_read(config->bus, - config->i2c_addr_flags, start_reg, time_reg, num_reg); -} - -static int idt1337ag_read_reg(const struct device *dev, - uint8_t reg, uint8_t *val) -{ - const struct renesas_rtc_idt1337ag_config *const config = dev->config; - - return i2c_reg_read_byte(config->bus, config->i2c_addr_flags, reg, val); -} - -/* - * type == ALARM_TIMER: Writes alarm registers SECONDS, MINUTES, HOURS, and DAYS - * type == RTC_TIMER: Writes time registers SECONDS, MINUTES, HOURS, DAYS, and - * MONTHS, YEARS - */ -static int idt1337ag_write_time_regs(const struct device *dev, - uint8_t *time_reg, enum timer_type type) -{ - const struct renesas_rtc_idt1337ag_config *const config = dev->config; - uint8_t start_reg; - uint8_t num_reg; - - if (type == ALARM_TIMER) { - /* - * Register 0x0A bit 6 determines if the DAY(1b) or DATE(0b) - * alarm is selected. - * Select the DAY alarm - */ - time_reg[DAYS] |= SELECT_DAYS_ALARM; - - start_reg = REG_SECOND_ALARM1; - num_reg = NUM_ALARM_REGS; - } else { - start_reg = REG_SECONDS; - num_reg = NUM_TIMER_REGS; - } - - return i2c_burst_write(config->bus, - config->i2c_addr_flags, start_reg, time_reg, num_reg); -} - -static int idt1337ag_write_reg(const struct device *dev, - uint8_t reg, uint8_t val) -{ - const struct renesas_rtc_idt1337ag_config *const config = dev->config; - uint8_t tx_buf[2]; - - tx_buf[0] = reg; - tx_buf[1] = val; - - return i2c_write(config->bus, - tx_buf, sizeof(tx_buf), config->i2c_addr_flags); -} - -/* - * val bits 7 to 4 - tens place - * val bits 3 to 0 - ones place - */ -static int bcd_to_dec(uint8_t val, enum bcd_mask mask) -{ - int tens = ((val & mask) >> 4) * 10; - int ones = (val & 0xf); - - return tens + ones; -} - -/* - * val bits 7 to 4 - tens place - * val bits 3 to 0 - ones place - */ -static uint8_t dec_to_bcd(uint32_t val, enum bcd_mask mask) -{ - int tens = val / 10; - int ones = val - (tens * 10); - - return ((tens << 4) & mask) | ones; -} - -static int renesas_rtc_idt1337ag_read_seconds(const struct device *dev, - uint32_t *value, enum timer_type type) -{ - uint8_t time_reg[NUM_TIMER_REGS]; - struct calendar_date time; - int ret; - - ret = idt1337ag_read_time_regs(dev, time_reg, type); - - if (ret < 0) { - return ret; - } - - if (type == ALARM_TIMER) { - *value = (bcd_to_dec(time_reg[DAYS], DAYS_MASK) * - SECS_PER_DAY) + - (bcd_to_dec(time_reg[HOURS], HOURS24_MASK) * - SECS_PER_HOUR) + - (bcd_to_dec(time_reg[MINUTES], MINUTES_MASK) * - SECS_PER_MINUTE) + - bcd_to_dec(time_reg[SECONDS], SECONDS_MASK); - } else { - time.year = bcd_to_dec(time_reg[YEARS], YEARS_MASK); - time.month = bcd_to_dec(time_reg[MONTHS], MONTHS_MASK); - time.day = bcd_to_dec(time_reg[DAYS], DAYS_MASK); - - *value = date_to_sec(time) - SECS_TILL_YEAR_2K + - (bcd_to_dec(time_reg[HOURS], HOURS24_MASK) * - SECS_PER_HOUR) + - (bcd_to_dec(time_reg[MINUTES], MINUTES_MASK) * - SECS_PER_MINUTE) + - bcd_to_dec(time_reg[SECONDS], SECONDS_MASK); - } - - return ret; -} - -static int renesas_rtc_idt1337ag_write_seconds(const struct device *dev, - uint32_t value, enum timer_type type) -{ - uint8_t time_reg[NUM_TIMER_REGS]; - struct calendar_date time; - uint32_t tmp_sec; - - time = sec_to_date(value + SECS_TILL_YEAR_2K); - - if (type == RTC_TIMER) { - time_reg[YEARS] = dec_to_bcd(time.year, YEARS_MASK); - time_reg[MONTHS] = dec_to_bcd(time.month, MONTHS_MASK); - } - - time_reg[DAYS] = dec_to_bcd(time.day, DAYS_MASK); - - value %= SECS_PER_DAY; - tmp_sec = value / SECS_PER_HOUR; - time_reg[HOURS] = dec_to_bcd(tmp_sec, HOURS24_MASK); - - value -= (tmp_sec * SECS_PER_HOUR); - tmp_sec = value / SECS_PER_MINUTE; - time_reg[MINUTES] = dec_to_bcd(tmp_sec, MINUTES_MASK); - - value -= (tmp_sec * SECS_PER_MINUTE); - time_reg[SECONDS] = dec_to_bcd(value, SECONDS_MASK); - - return idt1337ag_write_time_regs(dev, time_reg, type); -} - -static int renesas_rtc_idt1337ag_configure(const struct device *dev, - cros_rtc_alarm_callback_t callback) -{ - struct renesas_rtc_idt1337ag_data *data = dev->data; - - if (callback == NULL) { - return -EINVAL; - } - - data->alarm_callback = callback; - - return 0; -} - -static int renesas_rtc_idt1337ag_get_value(const struct device *dev, - uint32_t *value) -{ - return renesas_rtc_idt1337ag_read_seconds(dev, value, RTC_TIMER); -} - -static int renesas_rtc_idt1337ag_set_value(const struct device *dev, - uint32_t value) -{ - return renesas_rtc_idt1337ag_write_seconds(dev, value, RTC_TIMER); -} - -static int renesas_rtc_idt1337ag_get_alarm(const struct device *dev, - uint32_t *seconds, uint32_t *microseconds) -{ - *microseconds = 0; - return renesas_rtc_idt1337ag_read_seconds(dev, seconds, ALARM_TIMER); -} - -static int renesas_rtc_idt1337ag_reset_alarm(const struct device *dev) -{ - uint8_t time_reg[NUM_ALARM_REGS]; - int ret; - uint8_t val; - - ret = idt1337ag_read_reg(dev, REG_CONTROL, &val); - - if (ret < 0) { - return ret; - } - - /* Disable alarm interrupt and clear pending alarm flag */ - val &= ~CONTROL_A1IE; - ret = idt1337ag_write_reg(dev, REG_CONTROL, val); - - if (ret < 0) { - return ret; - } - - /* Clear alarm1 flag if set */ - ret = idt1337ag_read_reg(dev, REG_STATUS, &val); - - if (ret < 0) { - return ret; - } - - /* Clear the alarm1 and alarm2 flag */ - val &= ~(STATUS_A1F | STATUS_A2F); - ret = idt1337ag_write_reg(dev, REG_STATUS, val); - - if (ret < 0) { - return ret; - } - - /* Clear and disable the alarm registers */ - time_reg[SECONDS] = DISABLE_ALARM; - time_reg[MINUTES] = DISABLE_ALARM; - time_reg[HOURS] = DISABLE_ALARM; - time_reg[DAYS] = DISABLE_ALARM; - - return idt1337ag_write_time_regs(dev, time_reg, ALARM_TIMER); -} - -static int renesas_rtc_idt1337ag_set_alarm(const struct device *dev, - uint32_t seconds, uint32_t microseconds) -{ - int ret; - uint8_t val; - - ARG_UNUSED(microseconds); - - ret = renesas_rtc_idt1337ag_reset_alarm(dev); - if (ret < 0) { - return ret; - } - - ret = renesas_rtc_idt1337ag_write_seconds(dev, seconds, ALARM_TIMER); - if (ret < 0) { - return ret; - } - - ret = idt1337ag_read_reg(dev, REG_CONTROL, &val); - if (ret < 0) { - return ret; - } - - val |= CONTROL_A1IE; - idt1337ag_write_reg(dev, REG_CONTROL, val); - - return 0; -} - -static void renesas_rtc_idt1337ag_isr(const struct device *port, - struct gpio_callback *cb, uint32_t pin) -{ - struct renesas_rtc_idt1337ag_data *data = - CONTAINER_OF(cb, struct renesas_rtc_idt1337ag_data, gpio_cb); - const struct device *dev = data->dev; - - ARG_UNUSED(port); - ARG_UNUSED(pin); - ARG_UNUSED(cb); - - LOG_DBG("%s", __func__); - - /* Call callback function */ - if (data->alarm_callback) { - data->alarm_callback(dev); - } -} - -static const struct cros_rtc_driver_api renesas_rtc_idt1337ag_driver_api = { - .configure = renesas_rtc_idt1337ag_configure, - .get_value = renesas_rtc_idt1337ag_get_value, - .set_value = renesas_rtc_idt1337ag_set_value, - .get_alarm = renesas_rtc_idt1337ag_get_alarm, - .set_alarm = renesas_rtc_idt1337ag_set_alarm, - .reset_alarm = renesas_rtc_idt1337ag_reset_alarm, -}; - -static int renesas_rtc_idt1337ag_init(const struct device *dev) -{ - const struct renesas_rtc_idt1337ag_config *const config = dev->config; - struct renesas_rtc_idt1337ag_data *data = dev->data; - uint8_t val; - int ret; - - if (!device_is_ready(config->bus)) { - LOG_ERR("Device %s is not ready", config->bus->name); - return -ENODEV; - } - - /* - * Read Control register. For normal operation, - * the values should be as follows: - * Bit 7 (enable oscillator) : (0) normal mode - * Bit 6 (unused) : (0) - * Bit 5 (unused) : (0) - * BIT 4 (RS2) : (0) Not used when INTCN == 1 - * BIT 3 (RS1) : (0) Not used when INTCN == 1 - * BIT 2 (INTCN) : (1) a match between the timekeeping - * registers and the alarm 1 - * registers activate the INTA pin - * BIT 1 (A2IE) : (0) Alarm 2 is not used - * BIT 0 (A1IE) : (1) Enables Alarm 1 - */ - ret = idt1337ag_read_reg(dev, REG_CONTROL, &val); - - if (ret < 0) { - return ret; - } - - /* Enable IDT1337AG oscillator */ - val &= ~CONTROL_EOSC; - - /* Disable Alarm 2 */ - val &= ~CONTROL_A2IE; - - /* Alarm 1 assert INTA pin */ - val |= CONTROL_INTCN; - - ret = idt1337ag_write_reg(dev, REG_CONTROL, val); - - if (ret < 0) { - return ret; - } - - /* Date register isn't used. Set it to zero */ - ret = idt1337ag_write_reg(dev, REG_DATE, 0); - - /* Make sure the oscillator is running */ - ret = idt1337ag_read_reg(dev, REG_STATUS, &val); - - if (ret < 0) { - return ret; - } - - /* Clear IDT1337AG oscillator not running flag */ - val &= ~STATUS_OSF; - - /* Clear Alarm 2 flag */ - val &= ~STATUS_A2F; - - ret = idt1337ag_write_reg(dev, REG_STATUS, val); - - if (ret < 0) { - return ret; - } - - renesas_rtc_idt1337ag_reset_alarm(dev); - - /* Disable Alarm2 */ - idt1337ag_write_reg(dev, REG_MINUTE_ALARM2, DISABLE_ALARM); - idt1337ag_write_reg(dev, REG_HOUR_ALARM2, DISABLE_ALARM); - idt1337ag_write_reg(dev, REG_DAY_ALARM2, DISABLE_ALARM); - - /* Configure GPIO interrupt pin for IDT1337AG alarm pin */ - - if (!device_is_ready(config->gpio_alert.port)) { - LOG_ERR("Alert GPIO device not ready"); - return -ENODEV; - } - - ret = gpio_pin_configure_dt(&config->gpio_alert, GPIO_INPUT); - - if (ret < 0) { - LOG_ERR("Could not configure RTC alert pin"); - return ret; - } - - gpio_init_callback(&data->gpio_cb, - renesas_rtc_idt1337ag_isr, BIT(config->gpio_alert.pin)); - - ret = gpio_add_callback(config->gpio_alert.port, &data->gpio_cb); - - if (ret < 0) { - LOG_ERR("Could not set RTC alert pin callback"); - return ret; - } - - data->dev = dev; - - return gpio_pin_interrupt_configure_dt(&config->gpio_alert, - GPIO_INT_EDGE_FALLING); -} - -#define IDT1337AG_INT_GPIOS \ - DT_PHANDLE_BY_IDX(DT_NODELABEL(idt1337ag), int_gpios, 0) - -/* - * dt_flags is a uint8_t type. However, for platform/ec - * the GPIO flags in the devicetree are expanded past 8 bits - * to support the INPUT/OUTPUT and PULLUP/PULLDOWN properties. - * Cast back to a gpio_dt_flags to compile, discarding the bits - * that are not supported by the Zephyr GPIO API. - */ -#define CROS_EC_GPIO_DT_SPEC_GET_BY_IDX(node_id, prop, idx) \ - { \ - .port = \ - DEVICE_DT_GET(DT_GPIO_CTLR_BY_IDX(node_id, prop, idx)), \ - .pin = DT_GPIO_PIN_BY_IDX(node_id, prop, idx), \ - .dt_flags = \ - (gpio_dt_flags_t)DT_GPIO_FLAGS_BY_IDX(node_id, prop, idx), \ - } - -static const struct renesas_rtc_idt1337ag_config renesas_rtc_idt1337ag_cfg_0 = { - .bus = DEVICE_DT_GET(DT_INST_BUS(0)), - .i2c_addr_flags = DT_INST_REG_ADDR(0), - .gpio_alert = - CROS_EC_GPIO_DT_SPEC_GET_BY_IDX(IDT1337AG_INT_GPIOS, gpios, 0) -}; - -static struct renesas_rtc_idt1337ag_data renesas_rtc_idt1337ag_data_0; - -DEVICE_DT_INST_DEFINE(0, renesas_rtc_idt1337ag_init, /* pm_control_fn= */ NULL, - &renesas_rtc_idt1337ag_data_0, - &renesas_rtc_idt1337ag_cfg_0, - POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE, - &renesas_rtc_idt1337ag_driver_api); |