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Diffstat (limited to 'c/src/lib/libbsp/powerpc/gen5200/tod/todcfg.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/gen5200/tod/todcfg.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/gen5200/tod/todcfg.c b/c/src/lib/libbsp/powerpc/gen5200/tod/todcfg.c new file mode 100644 index 0000000000..381c91b70b --- /dev/null +++ b/c/src/lib/libbsp/powerpc/gen5200/tod/todcfg.c @@ -0,0 +1,123 @@ +/*===============================================================*\ +| Project: RTEMS generic MPC5200 BSP | ++-----------------------------------------------------------------+ +| File: $File$ ++-----------------------------------------------------------------+ +| 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.com/license/LICENSE. | +| | ++-----------------------------------------------------------------+ +| this file configures the pcf8563 RTC for a PM520 board | ++-----------------------------------------------------------------+ +| date history ID | +| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | +| 01.12.05 creation doe | +|*****************************************************************| +|*CVS information: | +|*(the following information is created automatically, | +|*do not edit here) | +|*****************************************************************| +|* $Log$ +|* Revision 1.4 2005/12/06 14:11:12 thomas +|* added EB file headers +|* + * +|*****************************************************************| +\*===============================================================*/ +/* + * This file contains the RTC driver table for Motorola MCF5206eLITE + * ColdFire evaluation board. + * + * 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.com/license/LICENSE. + * + * @(#) todcfg.c,v 1.4 2005/01/22 04:12:39 ralf Exp + */ + +#include "../include/bsp.h" +#include "../include/i2c.h" +#include <libchip/rtc.h> +#include "../tod/pcf8563.h" + +/* Forward function declaration */ +boolean mpc5200_pcf8563_probe(int minor); + +extern rtc_fns pcf8563_fns; + +/* The following table configures the RTC drivers used in this BSP */ +rtc_tbl RTC_Table[] = { + { + "/dev/rtc", /* sDeviceName */ + RTC_CUSTOM, /* deviceType */ + &pcf8563_fns, /* pDeviceFns */ + mpc5200_pcf8563_probe, /* deviceProbe */ + NULL, /* pDeviceParams */ + 0x01, /* ulCtrlPort1, for PCF8563-I2C bus number */ + PCF8563_I2C_ADDRESS, /* ulDataPort, for PCF8563-I2C device addr */ + NULL, /* getRegister - not applicable to PCF8563 */ + NULL /* setRegister - not applicable to PCF8563 */ + } +}; + +/* Some information used by the RTC driver */ + +#define NUM_RTCS (sizeof(RTC_Table)/sizeof(rtc_tbl)) + +size_t RTC_Count = NUM_RTCS; + +rtems_device_minor_number RTC_Minor; + +/* mpc5200_pcf8563_probe -- + * RTC presence probe function. Return TRUE, if device is present. + * Device presence checked by probe access to RTC device over I2C bus. + * + * PARAMETERS: + * minor - minor RTC device number + * + * RETURNS: + * TRUE, if RTC device is present + */ +boolean +mpc5200_pcf8563_probe(int minor) +{ + int try = 0; + i2c_message_status status; + rtc_tbl *rtc; + i2c_bus_number bus; + i2c_address addr; + + if (minor >= NUM_RTCS) + return FALSE; + + rtc = RTC_Table + minor; + + bus = rtc->ulCtrlPort1; + addr = rtc->ulDataPort; + do { + status = i2c_wrbyte(bus, addr, 0); + if (status == I2C_NO_DEVICE) + return FALSE; + try++; + } while ((try < 15) && (status != I2C_SUCCESSFUL)); + if (status == I2C_SUCCESSFUL) + return TRUE; + else + return FALSE; +} |