diff options
Diffstat (limited to 'arch/mips/tx4938/common/rtc_rx5c348.c')
| -rw-r--r-- | arch/mips/tx4938/common/rtc_rx5c348.c | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/arch/mips/tx4938/common/rtc_rx5c348.c b/arch/mips/tx4938/common/rtc_rx5c348.c deleted file mode 100644 index 07f782fc0725..000000000000 --- a/arch/mips/tx4938/common/rtc_rx5c348.c +++ /dev/null @@ -1,192 +0,0 @@ -/* - * RTC routines for RICOH Rx5C348 SPI chip. - * Copyright (C) 2000-2001 Toshiba Corporation - * - * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the - * terms of the GNU General Public License version 2. This program is - * licensed "as is" without any warranty of any kind, whether express - * or implied. - * - * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com) - */ -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/string.h> -#include <linux/rtc.h> -#include <linux/time.h> -#include <linux/bcd.h> -#include <asm/time.h> -#include <asm/tx4938/spi.h> - -#define EPOCH 2000 - -/* registers */ -#define Rx5C348_REG_SECOND 0 -#define Rx5C348_REG_MINUTE 1 -#define Rx5C348_REG_HOUR 2 -#define Rx5C348_REG_WEEK 3 -#define Rx5C348_REG_DAY 4 -#define Rx5C348_REG_MONTH 5 -#define Rx5C348_REG_YEAR 6 -#define Rx5C348_REG_ADJUST 7 -#define Rx5C348_REG_ALARM_W_MIN 8 -#define Rx5C348_REG_ALARM_W_HOUR 9 -#define Rx5C348_REG_ALARM_W_WEEK 10 -#define Rx5C348_REG_ALARM_D_MIN 11 -#define Rx5C348_REG_ALARM_D_HOUR 12 -#define Rx5C348_REG_CTL1 14 -#define Rx5C348_REG_CTL2 15 - -/* register bits */ -#define Rx5C348_BIT_PM 0x20 /* REG_HOUR */ -#define Rx5C348_BIT_Y2K 0x80 /* REG_MONTH */ -#define Rx5C348_BIT_24H 0x20 /* REG_CTL1 */ -#define Rx5C348_BIT_XSTP 0x10 /* REG_CTL2 */ - -/* commands */ -#define Rx5C348_CMD_W(addr) (((addr) << 4) | 0x08) /* single write */ -#define Rx5C348_CMD_R(addr) (((addr) << 4) | 0x0c) /* single read */ -#define Rx5C348_CMD_MW(addr) (((addr) << 4) | 0x00) /* burst write */ -#define Rx5C348_CMD_MR(addr) (((addr) << 4) | 0x04) /* burst read */ - -static struct spi_dev_desc srtc_dev_desc = { - .baud = 1000000, /* 1.0Mbps @ Vdd 2.0V */ - .tcss = 31, - .tcsh = 1, - .tcsr = 62, - /* 31us for Tcss (62us for Tcsr) is required for carry operation) */ - .byteorder = 1, /* MSB-First */ - .polarity = 0, /* High-Active */ - .phase = 1, /* Shift-Then-Sample */ - -}; -static int srtc_chipid; -static int srtc_24h; - -static inline int -spi_rtc_io(unsigned char *inbuf, unsigned char *outbuf, unsigned int count) -{ - unsigned char *inbufs[1], *outbufs[1]; - unsigned int incounts[2], outcounts[2]; - inbufs[0] = inbuf; - incounts[0] = count; - incounts[1] = 0; - outbufs[0] = outbuf; - outcounts[0] = count; - outcounts[1] = 0; - return txx9_spi_io(srtc_chipid, &srtc_dev_desc, - inbufs, incounts, outbufs, outcounts, 0); -} - -/* RTC-dependent code for time.c */ - -static int -rtc_rx5c348_set_time(unsigned long t) -{ - unsigned char inbuf[8]; - struct rtc_time tm; - u8 year, month, day, hour, minute, second, century; - - /* convert */ - to_tm(t, &tm); - - year = tm.tm_year % 100; - month = tm.tm_mon+1; /* tm_mon starts from 0 to 11 */ - day = tm.tm_mday; - hour = tm.tm_hour; - minute = tm.tm_min; - second = tm.tm_sec; - century = tm.tm_year / 100; - - inbuf[0] = Rx5C348_CMD_MW(Rx5C348_REG_SECOND); - BIN_TO_BCD(second); - inbuf[1] = second; - BIN_TO_BCD(minute); - inbuf[2] = minute; - - if (srtc_24h) { - BIN_TO_BCD(hour); - inbuf[3] = hour; - } else { - /* hour 0 is AM12, noon is PM12 */ - inbuf[3] = 0; - if (hour >= 12) - inbuf[3] = Rx5C348_BIT_PM; - hour = (hour + 11) % 12 + 1; - BIN_TO_BCD(hour); - inbuf[3] |= hour; - } - inbuf[4] = 0; /* ignore week */ - BIN_TO_BCD(day); - inbuf[5] = day; - BIN_TO_BCD(month); - inbuf[6] = month; - if (century >= 20) - inbuf[6] |= Rx5C348_BIT_Y2K; - BIN_TO_BCD(year); - inbuf[7] = year; - /* write in one transfer to avoid data inconsistency */ - return spi_rtc_io(inbuf, NULL, 8); -} - -static unsigned long -rtc_rx5c348_get_time(void) -{ - unsigned char inbuf[8], outbuf[8]; - unsigned int year, month, day, hour, minute, second; - - inbuf[0] = Rx5C348_CMD_MR(Rx5C348_REG_SECOND); - memset(inbuf + 1, 0, 7); - /* read in one transfer to avoid data inconsistency */ - if (spi_rtc_io(inbuf, outbuf, 8)) - return 0; - second = outbuf[1]; - BCD_TO_BIN(second); - minute = outbuf[2]; - BCD_TO_BIN(minute); - if (srtc_24h) { - hour = outbuf[3]; - BCD_TO_BIN(hour); - } else { - hour = outbuf[3] & ~Rx5C348_BIT_PM; - BCD_TO_BIN(hour); - hour %= 12; - if (outbuf[3] & Rx5C348_BIT_PM) - hour += 12; - } - day = outbuf[5]; - BCD_TO_BIN(day); - month = outbuf[6] & ~Rx5C348_BIT_Y2K; - BCD_TO_BIN(month); - year = outbuf[7]; - BCD_TO_BIN(year); - year += EPOCH; - - return mktime(year, month, day, hour, minute, second); -} - -void __init -rtc_rx5c348_init(int chipid) -{ - unsigned char inbuf[2], outbuf[2]; - srtc_chipid = chipid; - /* turn on RTC if it is not on */ - inbuf[0] = Rx5C348_CMD_R(Rx5C348_REG_CTL2); - inbuf[1] = 0; - spi_rtc_io(inbuf, outbuf, 2); - if (outbuf[1] & Rx5C348_BIT_XSTP) { - inbuf[0] = Rx5C348_CMD_W(Rx5C348_REG_CTL2); - inbuf[1] = 0; - spi_rtc_io(inbuf, NULL, 2); - } - - inbuf[0] = Rx5C348_CMD_R(Rx5C348_REG_CTL1); - inbuf[1] = 0; - spi_rtc_io(inbuf, outbuf, 2); - if (outbuf[1] & Rx5C348_BIT_24H) - srtc_24h = 1; - - /* set the function pointers */ - rtc_mips_get_time = rtc_rx5c348_get_time; - rtc_mips_set_time = rtc_rx5c348_set_time; -} |