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-rw-r--r--arch/sh64/kernel/time.c196
1 files changed, 67 insertions, 129 deletions
diff --git a/arch/sh64/kernel/time.c b/arch/sh64/kernel/time.c
index 06f3c179e345..d1a9b5b078bd 100644
--- a/arch/sh64/kernel/time.c
+++ b/arch/sh64/kernel/time.c
@@ -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);
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-18 17:37:39 +0000