diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/rtc/rx8025.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/rtc/rx8025.c | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/qemu/roms/u-boot/drivers/rtc/rx8025.c b/qemu/roms/u-boot/drivers/rtc/rx8025.c deleted file mode 100644 index b4a149b73..000000000 --- a/qemu/roms/u-boot/drivers/rtc/rx8025.c +++ /dev/null @@ -1,211 +0,0 @@ -/* - * (C) Copyright 2007 - * Matthias Fuchs, esd gmbh, matthias.fuchs@esd-electronics.com. - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -/* - * Epson RX8025 RTC driver. - */ - -#include <common.h> -#include <command.h> -#include <rtc.h> -#include <i2c.h> - -#if defined(CONFIG_CMD_DATE) - -/*---------------------------------------------------------------------*/ -#undef DEBUG_RTC - -#ifdef DEBUG_RTC -#define DEBUGR(fmt,args...) printf(fmt ,##args) -#else -#define DEBUGR(fmt,args...) -#endif -/*---------------------------------------------------------------------*/ - -#ifndef CONFIG_SYS_I2C_RTC_ADDR -# define CONFIG_SYS_I2C_RTC_ADDR 0x32 -#endif - -/* - * RTC register addresses - */ -#define RTC_SEC_REG_ADDR 0x00 -#define RTC_MIN_REG_ADDR 0x01 -#define RTC_HR_REG_ADDR 0x02 -#define RTC_DAY_REG_ADDR 0x03 -#define RTC_DATE_REG_ADDR 0x04 -#define RTC_MON_REG_ADDR 0x05 -#define RTC_YR_REG_ADDR 0x06 - -#define RTC_CTL1_REG_ADDR 0x0e -#define RTC_CTL2_REG_ADDR 0x0f - -/* - * Control register 1 bits - */ -#define RTC_CTL1_BIT_2412 0x20 - -/* - * Control register 2 bits - */ -#define RTC_CTL2_BIT_PON 0x10 -#define RTC_CTL2_BIT_VDET 0x40 -#define RTC_CTL2_BIT_XST 0x20 -#define RTC_CTL2_BIT_VDSL 0x80 - -/* - * Note: the RX8025 I2C RTC requires register - * reads and write to consist of a single bus - * cycle. It is not allowed to write the register - * address in a first cycle that is terminated by - * a STOP condition. The chips needs a 'restart' - * sequence (start sequence without a prior stop). - * This driver has been written for a 4xx board. - * U-Boot's 4xx i2c driver is currently not capable - * to generate such cycles to some work arounds - * are used. - */ - -/* static uchar rtc_read (uchar reg); */ -#define rtc_read(reg) buf[((reg) + 1) & 0xf] - -static void rtc_write (uchar reg, uchar val); - -/* - * Get the current time from the RTC - */ -int rtc_get (struct rtc_time *tmp) -{ - int rel = 0; - uchar sec, min, hour, mday, wday, mon, year, ctl2; - uchar buf[16]; - - if (i2c_read(CONFIG_SYS_I2C_RTC_ADDR, 0, 0, buf, 16)) - printf("Error reading from RTC\n"); - - sec = rtc_read(RTC_SEC_REG_ADDR); - min = rtc_read(RTC_MIN_REG_ADDR); - hour = rtc_read(RTC_HR_REG_ADDR); - wday = rtc_read(RTC_DAY_REG_ADDR); - mday = rtc_read(RTC_DATE_REG_ADDR); - mon = rtc_read(RTC_MON_REG_ADDR); - year = rtc_read(RTC_YR_REG_ADDR); - - DEBUGR ("Get RTC year: %02x mon: %02x mday: %02x wday: %02x " - "hr: %02x min: %02x sec: %02x\n", - year, mon, mday, wday, hour, min, sec); - - /* dump status */ - ctl2 = rtc_read(RTC_CTL2_REG_ADDR); - if (ctl2 & RTC_CTL2_BIT_PON) { - printf("RTC: power-on detected\n"); - rel = -1; - } - - if (ctl2 & RTC_CTL2_BIT_VDET) { - printf("RTC: voltage drop detected\n"); - rel = -1; - } - - if (!(ctl2 & RTC_CTL2_BIT_XST)) { - printf("RTC: oscillator stop detected\n"); - rel = -1; - } - - tmp->tm_sec = bcd2bin (sec & 0x7F); - tmp->tm_min = bcd2bin (min & 0x7F); - if (rtc_read(RTC_CTL1_REG_ADDR) & RTC_CTL1_BIT_2412) - tmp->tm_hour = bcd2bin (hour & 0x3F); - else - tmp->tm_hour = bcd2bin (hour & 0x1F) % 12 + - ((hour & 0x20) ? 12 : 0); - tmp->tm_mday = bcd2bin (mday & 0x3F); - tmp->tm_mon = bcd2bin (mon & 0x1F); - tmp->tm_year = bcd2bin (year) + ( bcd2bin (year) >= 70 ? 1900 : 2000); - tmp->tm_wday = bcd2bin (wday & 0x07); - tmp->tm_yday = 0; - tmp->tm_isdst= 0; - - DEBUGR ("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 rel; -} - -/* - * Set the RTC - */ -int rtc_set (struct rtc_time *tmp) -{ - DEBUGR ("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 < 1970 || tmp->tm_year > 2069) - printf("WARNING: year should be between 1970 and 2069!\n"); - - rtc_write (RTC_YR_REG_ADDR, bin2bcd (tmp->tm_year % 100)); - rtc_write (RTC_MON_REG_ADDR, bin2bcd (tmp->tm_mon)); - rtc_write (RTC_DAY_REG_ADDR, bin2bcd (tmp->tm_wday)); - rtc_write (RTC_DATE_REG_ADDR, bin2bcd (tmp->tm_mday)); - rtc_write (RTC_HR_REG_ADDR, bin2bcd (tmp->tm_hour)); - rtc_write (RTC_MIN_REG_ADDR, bin2bcd (tmp->tm_min)); - rtc_write (RTC_SEC_REG_ADDR, bin2bcd (tmp->tm_sec)); - - rtc_write (RTC_CTL1_REG_ADDR, RTC_CTL1_BIT_2412); - - return 0; -} - -/* - * Reset the RTC. We setting the date back to 1970-01-01. - */ -void rtc_reset (void) -{ - struct rtc_time tmp; - uchar buf[16]; - uchar ctl2; - - if (i2c_read(CONFIG_SYS_I2C_RTC_ADDR, 0, 0, buf, 16)) - printf("Error reading from RTC\n"); - - ctl2 = rtc_read(RTC_CTL2_REG_ADDR); - ctl2 &= ~(RTC_CTL2_BIT_PON | RTC_CTL2_BIT_VDET); - ctl2 |= RTC_CTL2_BIT_XST | RTC_CTL2_BIT_VDSL; - rtc_write (RTC_CTL2_REG_ADDR, ctl2); - - tmp.tm_year = 1970; - tmp.tm_mon = 1; - tmp.tm_mday= 1; - tmp.tm_hour = 0; - tmp.tm_min = 0; - tmp.tm_sec = 0; - - rtc_set(&tmp); - - printf ( "RTC: %4d-%02d-%02d %2d:%02d:%02d UTC\n", - tmp.tm_year, tmp.tm_mon, tmp.tm_mday, - tmp.tm_hour, tmp.tm_min, tmp.tm_sec); - - return; -} - -/* - * Helper functions - */ -static void rtc_write (uchar reg, uchar val) -{ - uchar buf[2]; - buf[0] = reg << 4; - buf[1] = val; - if (i2c_write(CONFIG_SYS_I2C_RTC_ADDR, 0, 0, buf, 2) != 0) - printf("Error writing to RTC\n"); - -} - -#endif /* CONFIG_RTC_RX8025 && CONFIG_CMD_DATE */ |