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sparc64: Use generic CMOS driver.

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Based largely upon a patch by Krzysztof Helt <krzysztof.h1@poczta.fm>

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2008-08-28 22:16:15 -07:00
parent e8b75c4fd6
commit da86783dda
3 changed files with 125 additions and 262 deletions
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10
arch/sparc/include/asm/mc146818rtc_64.h
View File

@ -7,12 +7,8 @@
#include <asm/io.h>
#ifndef RTC_PORT
#ifdef CONFIG_PCI
extern unsigned long ds1287_regs;
#else
#define ds1287_regs (0UL)
#endif
#define RTC_PORT(x) (ds1287_regs + (x))
extern unsigned long cmos_regs;
#define RTC_PORT(x) (cmos_regs + (x))
#define RTC_ALWAYS_BCD 0
#endif
@ -29,6 +25,4 @@ outb_p((addr),RTC_PORT(0)); \
outb_p((val),RTC_PORT(1)); \
})
#define RTC_IRQ 8
#endif /* __ASM_SPARC64_MC146818RTC_H */

1
arch/sparc64/Kconfig
View File

@ -21,6 +21,7 @@ config SPARC64
select ARCH_WANT_OPTIONAL_GPIOLIB
select RTC_CLASS
select RTC_DRV_M48T59
select RTC_DRV_CMOS
config GENERIC_TIME
bool

376
arch/sparc64/kernel/time.c
View File

@ -52,10 +52,7 @@
#include "entry.h"
DEFINE_SPINLOCK(rtc_lock);
#ifdef CONFIG_PCI
unsigned long ds1287_regs = 0UL;
static void __iomem *bq4802_regs;
#endif
static int set_rtc_mmss(unsigned long);
@ -413,69 +410,38 @@ int update_persistent_clock(struct timespec now)
static void __init set_system_time(void)
{
unsigned int year, mon, day, hour, min, sec;
#ifdef CONFIG_PCI
unsigned long dregs = ds1287_regs;
void __iomem *bregs = bq4802_regs;
#else
unsigned long dregs = 0UL;
void __iomem *bregs = 0UL;
#endif
unsigned char val = readb(bregs + 0x0e);
unsigned int century;
if (!dregs && !bregs) {
if (!bregs) {
prom_printf("Something wrong, clock regs not mapped yet.\n");
prom_halt();
}
if (bregs) {
unsigned char val = readb(bregs + 0x0e);
unsigned int century;
/* BQ4802 RTC chip. */
/* BQ4802 RTC chip. */
writeb(val | 0x08, bregs + 0x0e);
writeb(val | 0x08, bregs + 0x0e);
sec = readb(bregs + 0x00);
min = readb(bregs + 0x02);
hour = readb(bregs + 0x04);
day = readb(bregs + 0x06);
mon = readb(bregs + 0x09);
year = readb(bregs + 0x0a);
century = readb(bregs + 0x0f);
sec = readb(bregs + 0x00);
min = readb(bregs + 0x02);
hour = readb(bregs + 0x04);
day = readb(bregs + 0x06);
mon = readb(bregs + 0x09);
year = readb(bregs + 0x0a);
century = readb(bregs + 0x0f);
writeb(val, bregs + 0x0e);
writeb(val, bregs + 0x0e);
BCD_TO_BIN(sec);
BCD_TO_BIN(min);
BCD_TO_BIN(hour);
BCD_TO_BIN(day);
BCD_TO_BIN(mon);
BCD_TO_BIN(year);
BCD_TO_BIN(century);
BCD_TO_BIN(sec);
BCD_TO_BIN(min);
BCD_TO_BIN(hour);
BCD_TO_BIN(day);
BCD_TO_BIN(mon);
BCD_TO_BIN(year);
BCD_TO_BIN(century);
year += (century * 100);
} else {
/* Dallas 12887 RTC chip. */
do {
sec = CMOS_READ(RTC_SECONDS);
min = CMOS_READ(RTC_MINUTES);
hour = CMOS_READ(RTC_HOURS);
day = CMOS_READ(RTC_DAY_OF_MONTH);
mon = CMOS_READ(RTC_MONTH);
year = CMOS_READ(RTC_YEAR);
} while (sec != CMOS_READ(RTC_SECONDS));
if (!(CMOS_READ(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
BCD_TO_BIN(sec);
BCD_TO_BIN(min);
BCD_TO_BIN(hour);
BCD_TO_BIN(day);
BCD_TO_BIN(mon);
BCD_TO_BIN(year);
}
if ((year += 1900) < 1970)
year += 100;
}
year += (century * 100);
xtime.tv_sec = mktime(year, mon, day, hour, min, sec);
xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
@ -546,48 +512,79 @@ retry:
return -EOPNOTSUPP;
}
static int __init rtc_model_matches(const char *model)
{
if (strcmp(model, "m5819") &&
strcmp(model, "m5819p") &&
strcmp(model, "m5823") &&
strcmp(model, "ds1287") &&
strcmp(model, "bq4802"))
return 0;
unsigned long cmos_regs;
EXPORT_SYMBOL(cmos_regs);
return 1;
}
struct resource rtc_cmos_resource;
static struct platform_device rtc_cmos_device = {
.name = "rtc_cmos",
.id = -1,
.resource = &rtc_cmos_resource,
.num_resources = 1,
};
static int __devinit rtc_probe(struct of_device *op, const struct of_device_id *match)
{
struct resource *r;
printk(KERN_INFO "%s: RTC regs at 0x%lx\n",
op->node->full_name, op->resource[0].start);
/* The CMOS RTC driver only accepts IORESOURCE_IO, so cons
* up a fake resource so that the probe works for all cases.
* When the RTC is behind an ISA bus it will have IORESOURCE_IO
* already, whereas when it's behind EBUS is will be IORESOURCE_MEM.
*/
r = &rtc_cmos_resource;
r->flags = IORESOURCE_IO;
r->name = op->resource[0].name;
r->start = op->resource[0].start;
r->end = op->resource[0].end;
cmos_regs = op->resource[0].start;
return platform_device_register(&rtc_cmos_device);
}
static struct of_device_id rtc_match[] = {
{
.name = "rtc",
.compatible = "m5819",
},
{
.name = "rtc",
.compatible = "isa-m5819p",
},
{
.name = "rtc",
.compatible = "isa-m5823p",
},
{
.name = "rtc",
.compatible = "ds1287",
},
{},
};
static struct of_platform_driver rtc_driver = {
.match_table = rtc_match,
.probe = rtc_probe,
.driver = {
.name = "rtc",
},
};
static int __devinit bq4802_probe(struct of_device *op, const struct of_device_id *match)
{
struct device_node *dp = op->node;
const char *model = of_get_property(dp, "model", NULL);
const char *compat = of_get_property(dp, "compatible", NULL);
unsigned long size, flags;
void __iomem *regs;
unsigned long flags;
if (!model)
model = compat;
if (!model || !rtc_model_matches(model))
return -ENODEV;
size = (op->resource[0].end - op->resource[0].start) + 1;
regs = of_ioremap(&op->resource[0], 0, size, "clock");
if (!regs)
bq4802_regs = of_ioremap(&op->resource[0], 0, resource_size(&op->resource[0]), "bq4802");
if (!bq4802_regs)
return -ENOMEM;
#ifdef CONFIG_PCI
if (!strcmp(model, "ds1287") ||
!strcmp(model, "m5819") ||
!strcmp(model, "m5819p") ||
!strcmp(model, "m5823")) {
ds1287_regs = (unsigned long) regs;
} else if (!strcmp(model, "bq4802")) {
bq4802_regs = regs;
}
#endif
printk(KERN_INFO "%s: Clock regs at %p\n", dp->full_name, regs);
printk(KERN_INFO "%s: Clock regs at %p\n", dp->full_name, bq4802_regs);
local_irq_save(flags);
@ -598,18 +595,18 @@ static int __devinit rtc_probe(struct of_device *op, const struct of_device_id *
return 0;
}
static struct of_device_id rtc_match[] = {
static struct of_device_id bq4802_match[] = {
{
.name = "rtc",
.compatible = "bq4802",
},
{},
};
static struct of_platform_driver rtc_driver = {
.match_table = rtc_match,
.probe = rtc_probe,
static struct of_platform_driver bq4802_driver = {
.match_table = bq4802_match,
.probe = bq4802_probe,
.driver = {
.name = "rtc",
.name = "bq4802",
},
};
@ -716,6 +713,7 @@ static int __init clock_init(void)
(void) of_register_driver(&rtc_driver, &of_platform_bus_type);
(void) of_register_driver(&mostek_driver, &of_platform_bus_type);
(void) of_register_driver(&bq4802_driver, &of_platform_bus_type);
return 0;
}
@ -989,96 +987,51 @@ unsigned long long sched_clock(void)
static int set_rtc_mmss(unsigned long nowtime)
{
int real_seconds, real_minutes, chip_minutes;
#ifdef CONFIG_PCI
unsigned long dregs = ds1287_regs;
void __iomem *bregs = bq4802_regs;
#else
unsigned long dregs = 0UL;
void __iomem *bregs = 0UL;
#endif
unsigned long flags;
unsigned char val;
int retval = 0;
/*
* Not having a register set can lead to trouble.
* Also starfire doesn't have a tod clock.
*/
if (!dregs && !bregs)
if (!bregs)
return -1;
if (bregs) {
int retval = 0;
unsigned char val = readb(bregs + 0x0e);
spin_lock_irqsave(&rtc_lock, flags);
/* BQ4802 RTC chip. */
val = readb(bregs + 0x0e);
writeb(val | 0x08, bregs + 0x0e);
/* BQ4802 RTC chip. */
chip_minutes = readb(bregs + 0x02);
BCD_TO_BIN(chip_minutes);
real_seconds = nowtime % 60;
real_minutes = nowtime / 60;
if (((abs(real_minutes - chip_minutes) + 15)/30) & 1)
real_minutes += 30;
real_minutes %= 60;
writeb(val | 0x08, bregs + 0x0e);
if (abs(real_minutes - chip_minutes) < 30) {
BIN_TO_BCD(real_seconds);
BIN_TO_BCD(real_minutes);
writeb(real_seconds, bregs + 0x00);
writeb(real_minutes, bregs + 0x02);
} else {
printk(KERN_WARNING
"set_rtc_mmss: can't update from %d to %d\n",
chip_minutes, real_minutes);
retval = -1;
}
chip_minutes = readb(bregs + 0x02);
BCD_TO_BIN(chip_minutes);
real_seconds = nowtime % 60;
real_minutes = nowtime / 60;
if (((abs(real_minutes - chip_minutes) + 15)/30) & 1)
real_minutes += 30;
real_minutes %= 60;
writeb(val, bregs + 0x0e);
return retval;
if (abs(real_minutes - chip_minutes) < 30) {
BIN_TO_BCD(real_seconds);
BIN_TO_BCD(real_minutes);
writeb(real_seconds, bregs + 0x00);
writeb(real_minutes, bregs + 0x02);
} else {
int retval = 0;
unsigned char save_control, save_freq_select;
/* Stolen from arch/i386/kernel/time.c, see there for
* credits and descriptive comments.
*/
spin_lock_irqsave(&rtc_lock, flags);
save_control = CMOS_READ(RTC_CONTROL); /* tell the clock it's being set */
CMOS_WRITE((save_control|RTC_SET), RTC_CONTROL);
save_freq_select = CMOS_READ(RTC_FREQ_SELECT); /* stop and reset prescaler */
CMOS_WRITE((save_freq_select|RTC_DIV_RESET2), RTC_FREQ_SELECT);
chip_minutes = CMOS_READ(RTC_MINUTES);
if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD)
BCD_TO_BIN(chip_minutes);
real_seconds = nowtime % 60;
real_minutes = nowtime / 60;
if (((abs(real_minutes - chip_minutes) + 15)/30) & 1)
real_minutes += 30;
real_minutes %= 60;
if (abs(real_minutes - chip_minutes) < 30) {
if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
BIN_TO_BCD(real_seconds);
BIN_TO_BCD(real_minutes);
}
CMOS_WRITE(real_seconds,RTC_SECONDS);
CMOS_WRITE(real_minutes,RTC_MINUTES);
} else {
printk(KERN_WARNING
"set_rtc_mmss: can't update from %d to %d\n",
chip_minutes, real_minutes);
retval = -1;
}
CMOS_WRITE(save_control, RTC_CONTROL);
CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT);
spin_unlock_irqrestore(&rtc_lock, flags);
return retval;
printk(KERN_WARNING
"set_rtc_mmss: can't update from %d to %d\n",
chip_minutes, real_minutes);
retval = -1;
}
writeb(val, bregs + 0x0e);
spin_unlock_irqrestore(&rtc_lock, flags);
return retval;
}
#define RTC_IS_OPEN 0x01 /* means /dev/rtc is in use */
@ -1202,7 +1155,6 @@ static int hypervisor_set_rtc_time(struct rtc_time *time)
return hypervisor_set_time(seconds);
}
#ifdef CONFIG_PCI
static void bq4802_get_rtc_time(struct rtc_time *time)
{
unsigned char val = readb(bq4802_regs + 0x0e);
@ -1275,79 +1227,6 @@ static int bq4802_set_rtc_time(struct rtc_time *time)
return 0;
}
static void cmos_get_rtc_time(struct rtc_time *rtc_tm)
{
unsigned char ctrl;
rtc_tm->tm_sec = CMOS_READ(RTC_SECONDS);
rtc_tm->tm_min = CMOS_READ(RTC_MINUTES);
rtc_tm->tm_hour = CMOS_READ(RTC_HOURS);
rtc_tm->tm_mday = CMOS_READ(RTC_DAY_OF_MONTH);
rtc_tm->tm_mon = CMOS_READ(RTC_MONTH);
rtc_tm->tm_year = CMOS_READ(RTC_YEAR);
rtc_tm->tm_wday = CMOS_READ(RTC_DAY_OF_WEEK);
ctrl = CMOS_READ(RTC_CONTROL);
if (!(ctrl & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
BCD_TO_BIN(rtc_tm->tm_sec);
BCD_TO_BIN(rtc_tm->tm_min);
BCD_TO_BIN(rtc_tm->tm_hour);
BCD_TO_BIN(rtc_tm->tm_mday);
BCD_TO_BIN(rtc_tm->tm_mon);
BCD_TO_BIN(rtc_tm->tm_year);
BCD_TO_BIN(rtc_tm->tm_wday);
}
if (rtc_tm->tm_year <= 69)
rtc_tm->tm_year += 100;
rtc_tm->tm_mon--;
}
static int cmos_set_rtc_time(struct rtc_time *rtc_tm)
{
unsigned char mon, day, hrs, min, sec;
unsigned char save_control, save_freq_select;
unsigned int yrs;
yrs = rtc_tm->tm_year;
mon = rtc_tm->tm_mon + 1;
day = rtc_tm->tm_mday;
hrs = rtc_tm->tm_hour;
min = rtc_tm->tm_min;
sec = rtc_tm->tm_sec;
if (yrs >= 100)
yrs -= 100;
if (!(CMOS_READ(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
BIN_TO_BCD(sec);
BIN_TO_BCD(min);
BIN_TO_BCD(hrs);
BIN_TO_BCD(day);
BIN_TO_BCD(mon);
BIN_TO_BCD(yrs);
}
save_control = CMOS_READ(RTC_CONTROL);
CMOS_WRITE((save_control|RTC_SET), RTC_CONTROL);
save_freq_select = CMOS_READ(RTC_FREQ_SELECT);
CMOS_WRITE((save_freq_select|RTC_DIV_RESET2), RTC_FREQ_SELECT);
CMOS_WRITE(yrs, RTC_YEAR);
CMOS_WRITE(mon, RTC_MONTH);
CMOS_WRITE(day, RTC_DAY_OF_MONTH);
CMOS_WRITE(hrs, RTC_HOURS);
CMOS_WRITE(min, RTC_MINUTES);
CMOS_WRITE(sec, RTC_SECONDS);
CMOS_WRITE(save_control, RTC_CONTROL);
CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT);
return 0;
}
#endif /* CONFIG_PCI */
struct mini_rtc_ops {
void (*get_rtc_time)(struct rtc_time *);
int (*set_rtc_time)(struct rtc_time *);
@ -1363,18 +1242,11 @@ static struct mini_rtc_ops hypervisor_rtc_ops = {
.set_rtc_time = hypervisor_set_rtc_time,
};
#ifdef CONFIG_PCI
static struct mini_rtc_ops bq4802_rtc_ops = {
.get_rtc_time = bq4802_get_rtc_time,
.set_rtc_time = bq4802_set_rtc_time,
};
static struct mini_rtc_ops cmos_rtc_ops = {
.get_rtc_time = cmos_get_rtc_time,
.set_rtc_time = cmos_set_rtc_time,
};
#endif /* CONFIG_PCI */
static struct mini_rtc_ops *mini_rtc_ops;
static inline void mini_get_rtc_time(struct rtc_time *time)
@ -1501,12 +1373,8 @@ static int __init rtc_mini_init(void)
mini_rtc_ops = &hypervisor_rtc_ops;
else if (this_is_starfire)
mini_rtc_ops = &starfire_rtc_ops;
#ifdef CONFIG_PCI
else if (bq4802_regs)
mini_rtc_ops = &bq4802_rtc_ops;
else if (ds1287_regs)
mini_rtc_ops = &cmos_rtc_ops;
#endif /* CONFIG_PCI */
else
return -ENODEV;