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Diffstat (limited to 'c/src/lib/libbsp/powerpc/gen5200/tod/pcf8563.c')
-rw-r--r-- | c/src/lib/libbsp/powerpc/gen5200/tod/pcf8563.c | 228 |
1 files changed, 0 insertions, 228 deletions
diff --git a/c/src/lib/libbsp/powerpc/gen5200/tod/pcf8563.c b/c/src/lib/libbsp/powerpc/gen5200/tod/pcf8563.c deleted file mode 100644 index eb3d758f80..0000000000 --- a/c/src/lib/libbsp/powerpc/gen5200/tod/pcf8563.c +++ /dev/null @@ -1,228 +0,0 @@ -/*===============================================================*\ -| Project: RTEMS generic MPC5200 BSP | -+-----------------------------------------------------------------+ -| Partially based on the code references which are named below. | -| Adaptions, modifications, enhancements and any recent parts of | -| the code are: | -| Copyright (c) 2005 | -| Embedded Brains GmbH | -| Obere Lagerstr. 30 | -| D-82178 Puchheim | -| Germany | -| rtems@embedded-brains.de | -+-----------------------------------------------------------------+ -| The license and distribution terms for this file may be | -| found in the file LICENSE in this distribution or at | -| | -| http://www.rtems.org/license/LICENSE. | -| | -+-----------------------------------------------------------------+ -| this file contains the tod driver for a Philips pcf8563 I2C RTC | -\*===============================================================*/ -/* - * This file interfaces with the real-time clock found in a - * Philips PCF8563 serial real-time clock chip. - * This RTC have I2C bus interface. BSP have to provide I2C bus primitives - * to make this driver working. getRegister and setRegister primitives is - * not used here to avoid multiple transactions over I2C bus (each transaction - * require significant time and error when date/time information red may - * occurs). ulControlPort contains I2C bus number; ulDataPort contains - * RTC I2C device address. - * - * Based on a ds1307 driver from: - * - * Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russia - * Author: Victor V. Vengerov <vvv@oktet.ru> - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * - * http://www.rtems.org/license/LICENSE. - */ - -#include <rtems.h> -#include <bsp/fatal.h> -#include <bsp/i2c.h> -#include <libchip/rtc.h> -#include <string.h> -#include "../tod/pcf8563.h" - -/* Convert from/to Binary-Coded Decimal representation */ -#define From_BCD( _x ) ((((_x) >> 4) * 10) + ((_x) & 0x0F)) -#define To_BCD( _x ) ((((_x) / 10) << 4) + ((_x) % 10)) - -/* pcf8563_initialize -- - * Initialize PCF8563 real-time clock chip. If RTC is halted, this - * function resume counting. - * - * PARAMETERS: - * minor -- minor RTC device number - */ -static void -pcf8563_initialize(int minor) -{ - i2c_message_status status; - int try; - uint8_t ctrl1; - i2c_bus_number bus; - i2c_address addr; - - bus = RTC_Table[minor].ulCtrlPort1; - addr = RTC_Table[minor].ulDataPort; - - /* Read SECONDS register */ - try = 0; - do { - status = i2c_wbrd(bus, addr, PCF8563_CONTROL1_ADR, - &ctrl1, sizeof(ctrl1)); - try++; - } while ((status != I2C_SUCCESSFUL) && (try < 15)); - - /* If clock is halted, reset and start the clock */ - if ((ctrl1 & PCF8563_CONTROL1_STOP) != 0) - { - uint8_t start[8]; - memset(start, 0, sizeof(start)); - start[0] = PCF8563_CONTROL1_ADR; - try = 0; - do { - status = i2c_write(bus, addr, start, 2); - } while ((status != I2C_SUCCESSFUL) && (try < 15)); - } -} - -/* pcf8563_get_time -- - * read current time from PCF8563 real-time clock chip and convert it - * to the rtems_time_of_day structure. - * - * PARAMETERS: - * minor -- minor RTC device number - * time -- place to put return value (date and time) - * - * RETURNS: - * 0, if time obtained successfully - * -1, if error occured - */ -static int -pcf8563_get_time(int minor, rtems_time_of_day *time) -{ - i2c_bus_number bus; - i2c_address addr; - uint8_t info[10]; - uint32_t v1, v2; - i2c_message_status status; - int try; - - if (time == NULL) - return -1; - - bus = RTC_Table[minor].ulCtrlPort1; - addr = RTC_Table[minor].ulDataPort; - - memset(time, 0, sizeof(rtems_time_of_day)); - try = 0; - do { - status = i2c_wbrd(bus, addr, PCF8563_SECOND_ADR, info, sizeof(info)); - try++; - } while ((status != I2C_SUCCESSFUL) && (try < 10)); - - if (status != I2C_SUCCESSFUL) - { - return -1; - } - - v1 = info[PCF8563_YEAR_ADR-PCF8563_SECOND_ADR]; - v2 = From_BCD(v1); - if ((info[PCF8563_MONTH_ADR-PCF8563_SECOND_ADR] - & PCF8563_MONTH_CENTURY) == 0) { - time->year = 1900 + v2; - } - else { - time->year = 2000 + v2; - } - - v1 = info[PCF8563_MONTH_ADR-PCF8563_SECOND_ADR] & PCF8563_MONTH_MASK; - time->month = From_BCD(v1); - - v1 = info[PCF8563_DAY_ADR-PCF8563_SECOND_ADR] & PCF8563_DAY_MASK; - time->day = From_BCD(v1); - - v1 = info[PCF8563_HOUR_ADR-PCF8563_SECOND_ADR] & PCF8563_HOUR_MASK; - time->hour = From_BCD(v1); - - v1 = info[PCF8563_MINUTE_ADR-PCF8563_SECOND_ADR] & PCF8563_MINUTE_MASK; - time->minute = From_BCD(v1); - - v1 = info[PCF8563_SECOND_ADR-PCF8563_SECOND_ADR] & PCF8563_SECOND_MASK; - time->second = From_BCD(v1); - - return 0; -} - -/* pcf8563_set_time -- - * set time to the PCF8563 real-time clock chip - * - * PARAMETERS: - * minor -- minor RTC device number - * time -- new date and time to be written to PCF8563 - * - * RETURNS: - * 0, if time obtained successfully - * -1, if error occured - */ -static int -pcf8563_set_time(int minor, const rtems_time_of_day *time) -{ - i2c_bus_number bus; - i2c_address addr; - uint8_t info[8]; - i2c_message_status status; - int try; - - if (time == NULL) - return -1; - - bus = RTC_Table[minor].ulCtrlPort1; - addr = RTC_Table[minor].ulDataPort; - - if ((time->year >= 2100) || (time->year < 1900)) { - bsp_fatal(MPC5200_FATAL_PCF8563_INVALID_YEAR); - } - info[0] = PCF8563_SECOND_ADR; - info[1 + PCF8563_YEAR_ADR -PCF8563_SECOND_ADR] = To_BCD(time->year % 100); - info[1 + PCF8563_MONTH_ADR -PCF8563_SECOND_ADR] = To_BCD(time->month); - info[1 + PCF8563_DAY_ADR -PCF8563_SECOND_ADR] = To_BCD(time->day); - info[1 + PCF8563_HOUR_ADR -PCF8563_SECOND_ADR] = To_BCD(time->hour); - info[1 + PCF8563_MINUTE_ADR-PCF8563_SECOND_ADR] = To_BCD(time->minute); - info[1 + PCF8563_SECOND_ADR-PCF8563_SECOND_ADR] = To_BCD(time->second); - /* Do not set day of week */ - info[1 + PCF8563_DAY_OF_WEEK_ADR-PCF8563_SECOND_ADR] = 1; - - /* - * add century info - */ - if (time->year >= 2000) { - info[1 + PCF8563_MONTH_ADR -PCF8563_SECOND_ADR] |= PCF8563_MONTH_CENTURY; - } - /* - * send to device - */ - try = 0; - do { - status = i2c_write(bus, addr, info,sizeof(info)); - try++; - } while ((status != I2C_SUCCESSFUL) && (try < 10)); - - if (status != I2C_SUCCESSFUL) - return -1; - else - return 0; -} - -/* Driver function table */ - -rtc_fns pcf8563_fns = { - pcf8563_initialize, - pcf8563_get_time, - pcf8563_set_time -}; |