diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/rtc/rv3029.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/rtc/rv3029.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/qemu/roms/u-boot/drivers/rtc/rv3029.c b/qemu/roms/u-boot/drivers/rtc/rv3029.c deleted file mode 100644 index f08040a85..000000000 --- a/qemu/roms/u-boot/drivers/rtc/rv3029.c +++ /dev/null @@ -1,190 +0,0 @@ -/* - * (C) Copyright 2010 - * Heiko Schocher, DENX Software Engineering, hs@denx.de - * - * SPDX-License-Identifier: GPL-2.0+ - */ -#include <common.h> -#include <command.h> -#include <i2c.h> -#include <rtc.h> - -#define RTC_RV3029_CTRL1 0x00 -#define RTC_RV3029_CTRL1_EERE (1 << 3) - -#define RTC_RV3029_CTRL_STATUS 0x03 -#define RTC_RV3029_CTRLS_EEBUSY (1 << 7) - -#define RTC_RV3029_CTRL_RESET 0x04 -#define RTC_RV3029_CTRL_SYS_R (1 << 4) - -#define RTC_RV3029_CLOCK_PAGE 0x08 -#define RTC_RV3029_PAGE_LEN 7 - -#define RV3029C2_W_SECONDS 0x00 -#define RV3029C2_W_MINUTES 0x01 -#define RV3029C2_W_HOURS 0x02 -#define RV3029C2_W_DATE 0x03 -#define RV3029C2_W_DAYS 0x04 -#define RV3029C2_W_MONTHS 0x05 -#define RV3029C2_W_YEARS 0x06 - -#define RV3029C2_REG_HR_12_24 (1 << 6) /* 24h/12h mode */ -#define RV3029C2_REG_HR_PM (1 << 5) /* PM/AM bit in 12h mode */ - -#define RTC_RV3029_EEPROM_CTRL 0x30 -#define RTC_RV3029_TRICKLE_1K (1 << 4) -#define RTC_RV3029_TRICKLE_5K (1 << 5) -#define RTC_RV3029_TRICKLE_20K (1 << 6) -#define RTC_RV3029_TRICKLE_80K (1 << 7) - -int rtc_get( struct rtc_time *tmp ) -{ - int ret; - unsigned char buf[RTC_RV3029_PAGE_LEN]; - - ret = i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CLOCK_PAGE, 1, buf, \ - RTC_RV3029_PAGE_LEN); - if (ret) { - printf("%s: error reading RTC: %x\n", __func__, ret); - return -1; - } - tmp->tm_sec = bcd2bin( buf[RV3029C2_W_SECONDS] & 0x7f); - tmp->tm_min = bcd2bin( buf[RV3029C2_W_MINUTES] & 0x7f); - if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_12_24) { - /* 12h format */ - tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x1f); - if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_PM) - /* PM flag set */ - tmp->tm_hour += 12; - } else - tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x3f); - - tmp->tm_mday = bcd2bin( buf[RV3029C2_W_DATE] & 0x3F ); - tmp->tm_mon = bcd2bin( buf[RV3029C2_W_MONTHS] & 0x1F ); - tmp->tm_wday = bcd2bin( buf[RV3029C2_W_DAYS] & 0x07 ); - /* RTC supports only years > 1999 */ - tmp->tm_year = bcd2bin( buf[RV3029C2_W_YEARS]) + 2000; - tmp->tm_yday = 0; - tmp->tm_isdst = 0; - - debug( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", - tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, - tmp->tm_hour, tmp->tm_min, tmp->tm_sec ); - - return 0; -} - -int rtc_set( struct rtc_time *tmp ) -{ - int ret; - unsigned char buf[RTC_RV3029_PAGE_LEN]; - - debug( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", - tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, - tmp->tm_hour, tmp->tm_min, tmp->tm_sec); - - if (tmp->tm_year < 2000) { - printf("RTC: year %d < 2000 not possible\n", tmp->tm_year); - return -1; - } - buf[RV3029C2_W_SECONDS] = bin2bcd(tmp->tm_sec); - buf[RV3029C2_W_MINUTES] = bin2bcd(tmp->tm_min); - buf[RV3029C2_W_HOURS] = bin2bcd(tmp->tm_hour); - /* set 24h format */ - buf[RV3029C2_W_HOURS] &= ~RV3029C2_REG_HR_12_24; - buf[RV3029C2_W_DATE] = bin2bcd(tmp->tm_mday); - buf[RV3029C2_W_DAYS] = bin2bcd(tmp->tm_wday); - buf[RV3029C2_W_MONTHS] = bin2bcd(tmp->tm_mon); - tmp->tm_year -= 2000; - buf[RV3029C2_W_YEARS] = bin2bcd(tmp->tm_year); - ret = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CLOCK_PAGE, 1, - buf, RTC_RV3029_PAGE_LEN); - - /* give the RTC some time to update */ - udelay(1000); - return ret; -} - -/* sets EERE-Bit (automatic EEPROM refresh) */ -static void set_eere_bit(int state) -{ - unsigned char reg_ctrl1; - - (void)i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL1, 1, - ®_ctrl1, 1); - - if (state) - reg_ctrl1 |= RTC_RV3029_CTRL1_EERE; - else - reg_ctrl1 &= (~RTC_RV3029_CTRL1_EERE); - - (void)i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL1, 1, - ®_ctrl1, 1); -} - -/* waits until EEPROM page is no longer busy (times out after 10ms*loops) */ -static int wait_eebusy(int loops) -{ - int i; - unsigned char ctrl_status; - - for (i = 0; i < loops; i++) { - (void)i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL_STATUS, - 1, &ctrl_status, 1); - - if ((ctrl_status & RTC_RV3029_CTRLS_EEBUSY) == 0) - break; - udelay(10000); - } - return i; -} - -void rtc_reset (void) -{ - unsigned char buf[RTC_RV3029_PAGE_LEN]; - - buf[0] = RTC_RV3029_CTRL_SYS_R; - (void)i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL_RESET, 1, - buf, 1); - -#if defined(CONFIG_SYS_RV3029_TCR) - /* - * because EEPROM_CTRL register is in EEPROM page it is necessary to - * disable automatic EEPROM refresh and check if EEPROM is busy - * before EEPORM_CTRL register may be accessed - */ - set_eere_bit(0); - wait_eebusy(100); - /* read current trickle charger setting */ - (void)i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_EEPROM_CTRL, - 1, buf, 1); - /* enable automatic EEPROM refresh again */ - set_eere_bit(1); - - /* - * to minimize EEPROM access write trickle charger setting only if it - * differs from current value - */ - if ((buf[0] & 0xF0) != CONFIG_SYS_RV3029_TCR) { - buf[0] = (buf[0] & 0x0F) | CONFIG_SYS_RV3029_TCR; - /* - * write trickle charger setting (disable autom. EEPROM - * refresh and wait until EEPROM is idle) - */ - set_eere_bit(0); - wait_eebusy(100); - (void)i2c_write(CONFIG_SYS_I2C_RTC_ADDR, - RTC_RV3029_EEPROM_CTRL, 1, buf, 1); - /* - * it is necessary to wait 10ms before EEBUSY-Bit may be read - * (this is not documented in the data sheet yet, but the - * manufacturer recommends it) - */ - udelay(10000); - /* wait until EEPROM write access is finished */ - wait_eebusy(100); - set_eere_bit(1); - } -#endif -} |