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kernel_linux
提交 6c7e2a55 编写于 作者: P Paul Mundt
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sh64: Use the generic rtc-sh driver. 

Rip out the sh64-specific RTC bits, use rtc-sh instead.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
上级 9a519f62
隐藏空白更改
内联 并排
Showing with 67 addition and 129 deletion
arch/sh64/kernel/time.c
浏览文件 @ 6c7e2a55
......@@ -6,7 +6,7 @@
* arch/sh64/kernel/time.c
*
* Copyright (C) 2000, 2001 Paolo Alberelli
* Copyright (C) 2003, 2004 Paul Mundt
* Copyright (C) 2003 - 2007 Paul Mundt
* Copyright (C) 2003 Richard Curnow
*
* Original TMU/RTC code taken from sh version.
......@@ -14,7 +14,6 @@
* Some code taken from i386 version.
* Copyright (C) 1991, 1992, 1995 Linus Torvalds
*/
#include <linux/errno.h>
#include <linux/rwsem.h>
#include <linux/sched.h>
......@@ -30,17 +29,15 @@
#include <linux/smp.h>
#include <linux/module.h>
#include <linux/bcd.h>
#include <linux/timex.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <asm/registers.h> /* required by inline __asm__ stmt. */
#include <asm/processor.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/delay.h>
#include <linux/timex.h>
#include <linux/irq.h>
#include <asm/hardware.h>
#define TMU_TOCR_INIT 0x00
......@@ -48,19 +45,11 @@
#define TMU_TSTR_INIT 1
#define TMU_TSTR_OFF 0
/* RCR1 Bits */
#define RCR1_CF 0x80 /* Carry Flag */
#define RCR1_CIE 0x10 /* Carry Interrupt Enable */
#define RCR1_AIE 0x08 /* Alarm Interrupt Enable */
#define RCR1_AF 0x01 /* Alarm Flag */
/* RCR2 Bits */
#define RCR2_PEF 0x80 /* PEriodic interrupt Flag */
#define RCR2_PESMASK 0x70 /* Periodic interrupt Set */
#define RCR2_RTCEN 0x08 /* ENable RTC */
#define RCR2_ADJ 0x04 /* ADJustment (30-second) */
#define RCR2_RESET 0x02 /* Reset bit */
#define RCR2_START 0x01 /* Start bit */
/* Real Time Clock */
#define RTC_BLOCK_OFF 0x01040000
#define RTC_BASE PHYS_PERIPHERAL_BLOCK + RTC_BLOCK_OFF
#define RTC_RCR1_CIE 0x10 /* Carry Interrupt Enable */
#define RTC_RCR1 (rtc_base + 0x38)
/* Clock, Power and Reset Controller */
#define CPRC_BLOCK_OFF 0x01010000
......@@ -84,27 +73,6 @@
#define TMU0_TCNT TMU0_BASE+0x4 /* Long access */
#define TMU0_TCR TMU0_BASE+0x8 /* Word access */
/* Real Time Clock */
#define RTC_BLOCK_OFF 0x01040000
#define RTC_BASE PHYS_PERIPHERAL_BLOCK + RTC_BLOCK_OFF
#define R64CNT rtc_base+0x00
#define RSECCNT rtc_base+0x04
#define RMINCNT rtc_base+0x08
#define RHRCNT rtc_base+0x0c
#define RWKCNT rtc_base+0x10
#define RDAYCNT rtc_base+0x14
#define RMONCNT rtc_base+0x18
#define RYRCNT rtc_base+0x1c /* 16bit */
#define RSECAR rtc_base+0x20
#define RMINAR rtc_base+0x24
#define RHRAR rtc_base+0x28
#define RWKAR rtc_base+0x2c
#define RDAYAR rtc_base+0x30
#define RMONAR rtc_base+0x34
#define RCR1 rtc_base+0x38
#define RCR2 rtc_base+0x3c
#define TICK_SIZE (tick_nsec / 1000)
static unsigned long tmu_base, rtc_base;
......@@ -236,47 +204,23 @@ int do_settimeofday(struct timespec *tv)
}
EXPORT_SYMBOL(do_settimeofday);
static int set_rtc_time(unsigned long nowtime)
/* Dummy RTC ops */
static void null_rtc_get_time(struct timespec *tv)
{
int retval = 0;
int real_seconds, real_minutes, cmos_minutes;
ctrl_outb(RCR2_RESET, RCR2); /* Reset pre-scaler & stop RTC */
cmos_minutes = ctrl_inb(RMINCNT);
BCD_TO_BIN(cmos_minutes);
/*
* since we're only adjusting minutes and seconds,
* don't interfere with hour overflow. This avoids
* messing with unknown time zones but requires your
* RTC not to be off by more than 15 minutes
*/
real_seconds = nowtime % 60;
real_minutes = nowtime / 60;
if (((abs(real_minutes - cmos_minutes) + 15)/30) & 1)
real_minutes += 30; /* correct for half hour time zone */
real_minutes %= 60;
if (abs(real_minutes - cmos_minutes) < 30) {
BIN_TO_BCD(real_seconds);
BIN_TO_BCD(real_minutes);
ctrl_outb(real_seconds, RSECCNT);
ctrl_outb(real_minutes, RMINCNT);
} else {
printk(KERN_WARNING
"set_rtc_time: can't update from %d to %d\n",
cmos_minutes, real_minutes);
retval = -1;
}
ctrl_outb(RCR2_RTCEN|RCR2_START, RCR2); /* Start RTC */
tv->tv_sec = mktime(2000, 1, 1, 0, 0, 0);
tv->tv_nsec = 0;
}
return retval;
static int null_rtc_set_time(const time_t secs)
{
return 0;
}
void (*rtc_sh_get_time)(struct timespec *) = null_rtc_get_time;
int (*rtc_sh_set_time)(const time_t) = null_rtc_set_time;
/* last time the RTC clock got updated */
static long last_rtc_update = 0;
static long last_rtc_update;
/*
* timer_interrupt() needs to keep up the real-time clock,
......@@ -312,10 +256,11 @@ static inline void do_timer_interrupt(void)
xtime.tv_sec > last_rtc_update + 660 &&
(xtime.tv_nsec / 1000) >= 500000 - ((unsigned) TICK_SIZE) / 2 &&
(xtime.tv_nsec / 1000) <= 500000 + ((unsigned) TICK_SIZE) / 2) {
if (set_rtc_time(xtime.tv_sec) == 0)
if (rtc_sh_set_time(xtime.tv_sec) == 0)
last_rtc_update = xtime.tv_sec;
else
last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */
/* do it again in 60 s */
last_rtc_update = xtime.tv_sec - 600;
}
}
......@@ -347,50 +292,6 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
static unsigned long get_rtc_time(void)
{
unsigned int sec, min, hr, wk, day, mon, yr, yr100;
again:
do {
ctrl_outb(0, RCR1); /* Clear CF-bit */
sec = ctrl_inb(RSECCNT);
min = ctrl_inb(RMINCNT);
hr = ctrl_inb(RHRCNT);
wk = ctrl_inb(RWKCNT);
day = ctrl_inb(RDAYCNT);
mon = ctrl_inb(RMONCNT);
yr = ctrl_inw(RYRCNT);
yr100 = (yr >> 8);
yr &= 0xff;
} while ((ctrl_inb(RCR1) & RCR1_CF) != 0);
BCD_TO_BIN(yr100);
BCD_TO_BIN(yr);
BCD_TO_BIN(mon);
BCD_TO_BIN(day);
BCD_TO_BIN(hr);
BCD_TO_BIN(min);
BCD_TO_BIN(sec);
if (yr > 99 || mon < 1 || mon > 12 || day > 31 || day < 1 ||
hr > 23 || min > 59 || sec > 59) {
printk(KERN_ERR
"SH RTC: invalid value, resetting to 1 Jan 2000\n");
ctrl_outb(RCR2_RESET, RCR2); /* Reset & Stop */
ctrl_outb(0, RSECCNT);
ctrl_outb(0, RMINCNT);
ctrl_outb(0, RHRCNT);
ctrl_outb(6, RWKCNT);
ctrl_outb(1, RDAYCNT);
ctrl_outb(1, RMONCNT);
ctrl_outw(0x2000, RYRCNT);
ctrl_outb(RCR2_RTCEN|RCR2_START, RCR2); /* Start */
goto again;
}
return mktime(yr100 * 100 + yr, mon, day, hr, min, sec);
}
static __init unsigned int get_cpu_hz(void)
{
......@@ -406,8 +307,8 @@ static __init unsigned int get_cpu_hz(void)
register unsigned long long __rtc_irq_flag __asm__ ("r3");
local_irq_enable();
do {} while (ctrl_inb(R64CNT) != 0);
ctrl_outb(RCR1_CIE, RCR1); /* Enable carry interrupt */
do {} while (ctrl_inb(rtc_base) != 0);
ctrl_outb(RTC_RCR1_CIE, RTC_RCR1); /* Enable carry interrupt */
/*
* r3 is arbitrary. CDC does not support "=z".
......@@ -470,7 +371,7 @@ static irqreturn_t sh64_rtc_interrupt(int irq, void *dev_id)
{
struct pt_regs *regs = get_irq_regs();
ctrl_outb(0, RCR1); /* Disable Carry Interrupts */
ctrl_outb(0, RTC_RCR1); /* Disable Carry Interrupts */
regs->regs[3] = 1; /* Using r3 */
return IRQ_HANDLED;
......@@ -513,8 +414,7 @@ void __init time_init(void)
panic("Unable to remap CPRC\n");
}
xtime.tv_sec = get_rtc_time();
xtime.tv_nsec = 0;
rtc_sh_get_time(&xtime);
setup_irq(TIMER_IRQ, &irq0);
setup_irq(RTC_IRQ, &irq1);
......@@ -525,7 +425,7 @@ void __init time_init(void)
/* Note careful order of operations to maintain reasonable precision and avoid overflow. */
scaled_recip_ctc_ticks_per_jiffy = ((1ULL << CTC_JIFFY_SCALE_SHIFT) / (unsigned long long)(cpu_clock / HZ));
disable_irq(RTC_IRQ);
free_irq(RTC_IRQ, NULL);
printk("CPU clock: %d.%02dMHz\n",
(cpu_clock / 1000000), (cpu_clock % 1000000)/10000);
......@@ -591,3 +491,41 @@ void enter_deep_standby(void)
asm __volatile__ ("nop");
panic("Unexpected wakeup!\n");
}
static struct resource rtc_resources[] = {
[0] = {
/* RTC base, filled in by rtc_init */
.flags = IORESOURCE_IO,
},
[1] = {
/* Period IRQ */
.start = IRQ_PRI,
.flags = IORESOURCE_IRQ,
},
[2] = {
/* Carry IRQ */
.start = IRQ_CUI,
.flags = IORESOURCE_IRQ,
},
[3] = {
/* Alarm IRQ */
.start = IRQ_ATI,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device rtc_device = {
.name = "sh-rtc",
.id = -1,
.num_resources = ARRAY_SIZE(rtc_resources),
.resource = rtc_resources,
};
static int __init rtc_init(void)
{
rtc_resources[0].start = rtc_base;
rtc_resources[0].end = rtc_resources[0].start + 0x58 - 1;
return platform_device_register(&rtc_device);
}
device_initcall(rtc_init);
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