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openwrt/target/linux/sibyte/patches/004-sibyte_rtc_cleanup.patch
Imre Kaloz 504cde6229 fixup sibyte rtc support 
SVN-Revision: 16094
2009-05-26 16:03:56 +00:00

532 lines
14 KiB
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--- a/arch/mips/sibyte/swarm/Makefile
+++ b/arch/mips/sibyte/swarm/Makefile
@@ -1,4 +1,3 @@
-obj-y := platform.o setup.o rtc_xicor1241.o \
- rtc_m41t81.o
+obj-y := platform.o setup.o
obj-$(CONFIG_I2C_BOARDINFO) += swarm-i2c.o
--- a/arch/mips/sibyte/swarm/rtc_m41t81.c
+++ /dev/null
@@ -1,233 +0,0 @@
-/*
- * Copyright (C) 2000, 2001 Broadcom Corporation
- *
- * Copyright (C) 2002 MontaVista Software Inc.
- * Author: jsun@mvista.com or jsun@junsun.net
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- */
-#include <linux/bcd.h>
-#include <linux/types.h>
-#include <linux/time.h>
-
-#include <asm/time.h>
-#include <asm/addrspace.h>
-#include <asm/io.h>
-
-#include <asm/sibyte/sb1250.h>
-#include <asm/sibyte/sb1250_regs.h>
-#include <asm/sibyte/sb1250_smbus.h>
-
-
-/* M41T81 definitions */
-
-/*
- * Register bits
- */
-
-#define M41T81REG_SC_ST 0x80 /* stop bit */
-#define M41T81REG_HR_CB 0x40 /* century bit */
-#define M41T81REG_HR_CEB 0x80 /* century enable bit */
-#define M41T81REG_CTL_S 0x20 /* sign bit */
-#define M41T81REG_CTL_FT 0x40 /* frequency test bit */
-#define M41T81REG_CTL_OUT 0x80 /* output level */
-#define M41T81REG_WD_RB0 0x01 /* watchdog resolution bit 0 */
-#define M41T81REG_WD_RB1 0x02 /* watchdog resolution bit 1 */
-#define M41T81REG_WD_BMB0 0x04 /* watchdog multiplier bit 0 */
-#define M41T81REG_WD_BMB1 0x08 /* watchdog multiplier bit 1 */
-#define M41T81REG_WD_BMB2 0x10 /* watchdog multiplier bit 2 */
-#define M41T81REG_WD_BMB3 0x20 /* watchdog multiplier bit 3 */
-#define M41T81REG_WD_BMB4 0x40 /* watchdog multiplier bit 4 */
-#define M41T81REG_AMO_ABE 0x20 /* alarm in "battery back-up mode" enable bit */
-#define M41T81REG_AMO_SQWE 0x40 /* square wave enable */
-#define M41T81REG_AMO_AFE 0x80 /* alarm flag enable flag */
-#define M41T81REG_ADT_RPT5 0x40 /* alarm repeat mode bit 5 */
-#define M41T81REG_ADT_RPT4 0x80 /* alarm repeat mode bit 4 */
-#define M41T81REG_AHR_RPT3 0x80 /* alarm repeat mode bit 3 */
-#define M41T81REG_AHR_HT 0x40 /* halt update bit */
-#define M41T81REG_AMN_RPT2 0x80 /* alarm repeat mode bit 2 */
-#define M41T81REG_ASC_RPT1 0x80 /* alarm repeat mode bit 1 */
-#define M41T81REG_FLG_AF 0x40 /* alarm flag (read only) */
-#define M41T81REG_FLG_WDF 0x80 /* watchdog flag (read only) */
-#define M41T81REG_SQW_RS0 0x10 /* sqw frequency bit 0 */
-#define M41T81REG_SQW_RS1 0x20 /* sqw frequency bit 1 */
-#define M41T81REG_SQW_RS2 0x40 /* sqw frequency bit 2 */
-#define M41T81REG_SQW_RS3 0x80 /* sqw frequency bit 3 */
-
-
-/*
- * Register numbers
- */
-
-#define M41T81REG_TSC 0x00 /* tenths/hundredths of second */
-#define M41T81REG_SC 0x01 /* seconds */
-#define M41T81REG_MN 0x02 /* minute */
-#define M41T81REG_HR 0x03 /* hour/century */
-#define M41T81REG_DY 0x04 /* day of week */
-#define M41T81REG_DT 0x05 /* date of month */
-#define M41T81REG_MO 0x06 /* month */
-#define M41T81REG_YR 0x07 /* year */
-#define M41T81REG_CTL 0x08 /* control */
-#define M41T81REG_WD 0x09 /* watchdog */
-#define M41T81REG_AMO 0x0A /* alarm: month */
-#define M41T81REG_ADT 0x0B /* alarm: date */
-#define M41T81REG_AHR 0x0C /* alarm: hour */
-#define M41T81REG_AMN 0x0D /* alarm: minute */
-#define M41T81REG_ASC 0x0E /* alarm: second */
-#define M41T81REG_FLG 0x0F /* flags */
-#define M41T81REG_SQW 0x13 /* square wave register */
-
-#define M41T81_CCR_ADDRESS 0x68
-
-#define SMB_CSR(reg) IOADDR(A_SMB_REGISTER(1, reg))
-
-static int m41t81_read(uint8_t addr)
-{
- while (__raw_readq(SMB_CSR(R_SMB_STATUS)) & M_SMB_BUSY)
- ;
-
- __raw_writeq(addr & 0xff, SMB_CSR(R_SMB_CMD));
- __raw_writeq(V_SMB_ADDR(M41T81_CCR_ADDRESS) | V_SMB_TT_WR1BYTE,
- SMB_CSR(R_SMB_START));
-
- while (__raw_readq(SMB_CSR(R_SMB_STATUS)) & M_SMB_BUSY)
- ;
-
- __raw_writeq(V_SMB_ADDR(M41T81_CCR_ADDRESS) | V_SMB_TT_RD1BYTE,
- SMB_CSR(R_SMB_START));
-
- while (__raw_readq(SMB_CSR(R_SMB_STATUS)) & M_SMB_BUSY)
- ;
-
- if (__raw_readq(SMB_CSR(R_SMB_STATUS)) & M_SMB_ERROR) {
- /* Clear error bit by writing a 1 */
- __raw_writeq(M_SMB_ERROR, SMB_CSR(R_SMB_STATUS));
- return -1;
- }
-
- return (__raw_readq(SMB_CSR(R_SMB_DATA)) & 0xff);
-}
-
-static int m41t81_write(uint8_t addr, int b)
-{
- while (__raw_readq(SMB_CSR(R_SMB_STATUS)) & M_SMB_BUSY)
- ;
-
- __raw_writeq(addr & 0xff, SMB_CSR(R_SMB_CMD));
- __raw_writeq(b & 0xff, SMB_CSR(R_SMB_DATA));
- __raw_writeq(V_SMB_ADDR(M41T81_CCR_ADDRESS) | V_SMB_TT_WR2BYTE,
- SMB_CSR(R_SMB_START));
-
- while (__raw_readq(SMB_CSR(R_SMB_STATUS)) & M_SMB_BUSY)
- ;
-
- if (__raw_readq(SMB_CSR(R_SMB_STATUS)) & M_SMB_ERROR) {
- /* Clear error bit by writing a 1 */
- __raw_writeq(M_SMB_ERROR, SMB_CSR(R_SMB_STATUS));
- return -1;
- }
-
- /* read the same byte again to make sure it is written */
- __raw_writeq(V_SMB_ADDR(M41T81_CCR_ADDRESS) | V_SMB_TT_RD1BYTE,
- SMB_CSR(R_SMB_START));
-
- while (__raw_readq(SMB_CSR(R_SMB_STATUS)) & M_SMB_BUSY)
- ;
-
- return 0;
-}
-
-int m41t81_set_time(unsigned long t)
-{
- struct rtc_time tm;
- unsigned long flags;
-
- /* Note we don't care about the century */
- rtc_time_to_tm(t, &tm);
-
- /*
- * Note the write order matters as it ensures the correctness.
- * When we write sec, 10th sec is clear. It is reasonable to
- * believe we should finish writing min within a second.
- */
-
- spin_lock_irqsave(&rtc_lock, flags);
- tm.tm_sec = bin2bcd(tm.tm_sec);
- m41t81_write(M41T81REG_SC, tm.tm_sec);
-
- tm.tm_min = bin2bcd(tm.tm_min);
- m41t81_write(M41T81REG_MN, tm.tm_min);
-
- tm.tm_hour = bin2bcd(tm.tm_hour);
- tm.tm_hour = (tm.tm_hour & 0x3f) | (m41t81_read(M41T81REG_HR) & 0xc0);
- m41t81_write(M41T81REG_HR, tm.tm_hour);
-
- /* tm_wday starts from 0 to 6 */
- if (tm.tm_wday == 0) tm.tm_wday = 7;
- tm.tm_wday = bin2bcd(tm.tm_wday);
- m41t81_write(M41T81REG_DY, tm.tm_wday);
-
- tm.tm_mday = bin2bcd(tm.tm_mday);
- m41t81_write(M41T81REG_DT, tm.tm_mday);
-
- /* tm_mon starts from 0, *ick* */
- tm.tm_mon ++;
- tm.tm_mon = bin2bcd(tm.tm_mon);
- m41t81_write(M41T81REG_MO, tm.tm_mon);
-
- /* we don't do century, everything is beyond 2000 */
- tm.tm_year %= 100;
- tm.tm_year = bin2bcd(tm.tm_year);
- m41t81_write(M41T81REG_YR, tm.tm_year);
- spin_unlock_irqrestore(&rtc_lock, flags);
-
- return 0;
-}
-
-unsigned long m41t81_get_time(void)
-{
- unsigned int year, mon, day, hour, min, sec;
- unsigned long flags;
-
- /*
- * min is valid if two reads of sec are the same.
- */
- for (;;) {
- spin_lock_irqsave(&rtc_lock, flags);
- sec = m41t81_read(M41T81REG_SC);
- min = m41t81_read(M41T81REG_MN);
- if (sec == m41t81_read(M41T81REG_SC)) break;
- spin_unlock_irqrestore(&rtc_lock, flags);
- }
- hour = m41t81_read(M41T81REG_HR) & 0x3f;
- day = m41t81_read(M41T81REG_DT);
- mon = m41t81_read(M41T81REG_MO);
- year = m41t81_read(M41T81REG_YR);
- spin_unlock_irqrestore(&rtc_lock, flags);
-
- sec = bcd2bin(sec);
- min = bcd2bin(min);
- hour = bcd2bin(hour);
- day = bcd2bin(day);
- mon = bcd2bin(mon);
- year = bcd2bin(year);
-
- year += 2000;
-
- return mktime(year, mon, day, hour, min, sec);
-}
-
-int m41t81_probe(void)
-{
- unsigned int tmp;
-
- /* enable chip if it is not enabled yet */
- tmp = m41t81_read(M41T81REG_SC);
- m41t81_write(M41T81REG_SC, tmp & 0x7f);
-
- return (m41t81_read(M41T81REG_SC) != -1);
-}
--- a/arch/mips/sibyte/swarm/rtc_xicor1241.c
+++ /dev/null
@@ -1,210 +0,0 @@
-/*
- * Copyright (C) 2000, 2001 Broadcom Corporation
- *
- * Copyright (C) 2002 MontaVista Software Inc.
- * Author: jsun@mvista.com or jsun@junsun.net
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-#include <linux/bcd.h>
-#include <linux/types.h>
-#include <linux/time.h>
-
-#include <asm/time.h>
-#include <asm/addrspace.h>
-#include <asm/io.h>
-
-#include <asm/sibyte/sb1250.h>
-#include <asm/sibyte/sb1250_regs.h>
-#include <asm/sibyte/sb1250_smbus.h>
-
-
-/* Xicor 1241 definitions */
-
-/*
- * Register bits
- */
-
-#define X1241REG_SR_BAT 0x80 /* currently on battery power */
-#define X1241REG_SR_RWEL 0x04 /* r/w latch is enabled, can write RTC */
-#define X1241REG_SR_WEL 0x02 /* r/w latch is unlocked, can enable r/w now */
-#define X1241REG_SR_RTCF 0x01 /* clock failed */
-#define X1241REG_BL_BP2 0x80 /* block protect 2 */
-#define X1241REG_BL_BP1 0x40 /* block protect 1 */
-#define X1241REG_BL_BP0 0x20 /* block protect 0 */
-#define X1241REG_BL_WD1 0x10
-#define X1241REG_BL_WD0 0x08
-#define X1241REG_HR_MIL 0x80 /* military time format */
-
-/*
- * Register numbers
- */
-
-#define X1241REG_BL 0x10 /* block protect bits */
-#define X1241REG_INT 0x11 /* */
-#define X1241REG_SC 0x30 /* Seconds */
-#define X1241REG_MN 0x31 /* Minutes */
-#define X1241REG_HR 0x32 /* Hours */
-#define X1241REG_DT 0x33 /* Day of month */
-#define X1241REG_MO 0x34 /* Month */
-#define X1241REG_YR 0x35 /* Year */
-#define X1241REG_DW 0x36 /* Day of Week */
-#define X1241REG_Y2K 0x37 /* Year 2K */
-#define X1241REG_SR 0x3F /* Status register */
-
-#define X1241_CCR_ADDRESS 0x6F
-
-#define SMB_CSR(reg) IOADDR(A_SMB_REGISTER(1, reg))
-
-static int xicor_read(uint8_t addr)
-{
- while (__raw_readq(SMB_CSR(R_SMB_STATUS)) & M_SMB_BUSY)
- ;
-
- __raw_writeq((addr >> 8) & 0x7, SMB_CSR(R_SMB_CMD));
- __raw_writeq(addr & 0xff, SMB_CSR(R_SMB_DATA));
- __raw_writeq(V_SMB_ADDR(X1241_CCR_ADDRESS) | V_SMB_TT_WR2BYTE,
- SMB_CSR(R_SMB_START));
-
- while (__raw_readq(SMB_CSR(R_SMB_STATUS)) & M_SMB_BUSY)
- ;
-
- __raw_writeq(V_SMB_ADDR(X1241_CCR_ADDRESS) | V_SMB_TT_RD1BYTE,
- SMB_CSR(R_SMB_START));
-
- while (__raw_readq(SMB_CSR(R_SMB_STATUS)) & M_SMB_BUSY)
- ;
-
- if (__raw_readq(SMB_CSR(R_SMB_STATUS)) & M_SMB_ERROR) {
- /* Clear error bit by writing a 1 */
- __raw_writeq(M_SMB_ERROR, SMB_CSR(R_SMB_STATUS));
- return -1;
- }
-
- return (__raw_readq(SMB_CSR(R_SMB_DATA)) & 0xff);
-}
-
-static int xicor_write(uint8_t addr, int b)
-{
- while (__raw_readq(SMB_CSR(R_SMB_STATUS)) & M_SMB_BUSY)
- ;
-
- __raw_writeq(addr, SMB_CSR(R_SMB_CMD));
- __raw_writeq((addr & 0xff) | ((b & 0xff) << 8), SMB_CSR(R_SMB_DATA));
- __raw_writeq(V_SMB_ADDR(X1241_CCR_ADDRESS) | V_SMB_TT_WR3BYTE,
- SMB_CSR(R_SMB_START));
-
- while (__raw_readq(SMB_CSR(R_SMB_STATUS)) & M_SMB_BUSY)
- ;
-
- if (__raw_readq(SMB_CSR(R_SMB_STATUS)) & M_SMB_ERROR) {
- /* Clear error bit by writing a 1 */
- __raw_writeq(M_SMB_ERROR, SMB_CSR(R_SMB_STATUS));
- return -1;
- } else {
- return 0;
- }
-}
-
-int xicor_set_time(unsigned long t)
-{
- struct rtc_time tm;
- int tmp;
- unsigned long flags;
-
- rtc_time_to_tm(t, &tm);
- tm.tm_year += 1900;
-
- spin_lock_irqsave(&rtc_lock, flags);
- /* unlock writes to the CCR */
- xicor_write(X1241REG_SR, X1241REG_SR_WEL);
- xicor_write(X1241REG_SR, X1241REG_SR_WEL | X1241REG_SR_RWEL);
-
- /* trivial ones */
- tm.tm_sec = bin2bcd(tm.tm_sec);
- xicor_write(X1241REG_SC, tm.tm_sec);
-
- tm.tm_min = bin2bcd(tm.tm_min);
- xicor_write(X1241REG_MN, tm.tm_min);
-
- tm.tm_mday = bin2bcd(tm.tm_mday);
- xicor_write(X1241REG_DT, tm.tm_mday);
-
- /* tm_mon starts from 0, *ick* */
- tm.tm_mon ++;
- tm.tm_mon = bin2bcd(tm.tm_mon);
- xicor_write(X1241REG_MO, tm.tm_mon);
-
- /* year is split */
- tmp = tm.tm_year / 100;
- tm.tm_year %= 100;
- xicor_write(X1241REG_YR, tm.tm_year);
- xicor_write(X1241REG_Y2K, tmp);
-
- /* hour is the most tricky one */
- tmp = xicor_read(X1241REG_HR);
- if (tmp & X1241REG_HR_MIL) {
- /* 24 hour format */
- tm.tm_hour = bin2bcd(tm.tm_hour);
- tmp = (tmp & ~0x3f) | (tm.tm_hour & 0x3f);
- } else {
- /* 12 hour format, with 0x2 for pm */
- tmp = tmp & ~0x3f;
- if (tm.tm_hour >= 12) {
- tmp |= 0x20;
- tm.tm_hour -= 12;
- }
- tm.tm_hour = bin2bcd(tm.tm_hour);
- tmp |= tm.tm_hour;
- }
- xicor_write(X1241REG_HR, tmp);
-
- xicor_write(X1241REG_SR, 0);
- spin_unlock_irqrestore(&rtc_lock, flags);
-
- return 0;
-}
-
-unsigned long xicor_get_time(void)
-{
- unsigned int year, mon, day, hour, min, sec, y2k;
- unsigned long flags;
-
- spin_lock_irqsave(&rtc_lock, flags);
- sec = xicor_read(X1241REG_SC);
- min = xicor_read(X1241REG_MN);
- hour = xicor_read(X1241REG_HR);
-
- if (hour & X1241REG_HR_MIL) {
- hour &= 0x3f;
- } else {
- if (hour & 0x20)
- hour = (hour & 0xf) + 0x12;
- }
-
- day = xicor_read(X1241REG_DT);
- mon = xicor_read(X1241REG_MO);
- year = xicor_read(X1241REG_YR);
- y2k = xicor_read(X1241REG_Y2K);
- spin_unlock_irqrestore(&rtc_lock, flags);
-
- sec = bcd2bin(sec);
- min = bcd2bin(min);
- hour = bcd2bin(hour);
- day = bcd2bin(day);
- mon = bcd2bin(mon);
- year = bcd2bin(year);
- y2k = bcd2bin(y2k);
-
- year += (y2k * 100);
-
- return mktime(year, mon, day, hour, min, sec);
-}
-
-int xicor_probe(void)
-{
- return (xicor_read(X1241REG_SC) != -1);
-}
--- a/arch/mips/sibyte/swarm/setup.c
+++ b/arch/mips/sibyte/swarm/setup.c
@@ -56,14 +56,6 @@ extern void sb1250_setup(void);
#error invalid SiByte board configuration
#endif
-extern int xicor_probe(void);
-extern int xicor_set_time(unsigned long);
-extern unsigned long xicor_get_time(void);
-
-extern int m41t81_probe(void);
-extern int m41t81_set_time(unsigned long);
-extern unsigned long m41t81_get_time(void);
-
const char *get_system_type(void)
{
return "SiByte " SIBYTE_BOARD_NAME;
@@ -79,42 +71,14 @@ int swarm_be_handler(struct pt_regs *reg
return (is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL);
}
-enum swarm_rtc_type {
- RTC_NONE,
- RTC_XICOR,
- RTC_M4LT81
-};
-
-enum swarm_rtc_type swarm_rtc_type;
-
unsigned long read_persistent_clock(void)
{
- switch (swarm_rtc_type) {
- case RTC_XICOR:
- return xicor_get_time();
-
- case RTC_M4LT81:
- return m41t81_get_time();
-
- case RTC_NONE:
- default:
- return mktime(2000, 1, 1, 0, 0, 0);
- }
+ return mktime(2000, 1, 1, 0, 0, 0);
}
int rtc_mips_set_time(unsigned long sec)
{
- switch (swarm_rtc_type) {
- case RTC_XICOR:
- return xicor_set_time(sec);
-
- case RTC_M4LT81:
- return m41t81_set_time(sec);
-
- case RTC_NONE:
- default:
- return -1;
- }
+ return -1;
}
void __init plat_mem_setup(void)
@@ -131,11 +95,6 @@ void __init plat_mem_setup(void)
board_be_handler = swarm_be_handler;
- if (xicor_probe())
- swarm_rtc_type = RTC_XICOR;
- if (m41t81_probe())
- swarm_rtc_type = RTC_M4LT81;
-
printk("This kernel optimized for "
#ifdef CONFIG_SIMULATION
"simulation"
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