[SPARC64]: Add support for bq4802 TOD chip, as found on ultra45.
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
Родитель
95d71e663e
Коммит
d037e0532e
|
|
@ -55,6 +55,7 @@ DEFINE_SPINLOCK(rtc_lock);
|
|||
void __iomem *mstk48t02_regs = NULL;
|
||||
#ifdef CONFIG_PCI
|
||||
unsigned long ds1287_regs = 0UL;
|
||||
static void __iomem *bq4802_regs;
|
||||
#endif
|
||||
|
||||
static void __iomem *mstk48t08_regs;
|
||||
|
|
@ -565,12 +566,14 @@ static void __init set_system_time(void)
|
|||
void __iomem *mregs = mstk48t02_regs;
|
||||
#ifdef CONFIG_PCI
|
||||
unsigned long dregs = ds1287_regs;
|
||||
void __iomem *bregs = bq4802_regs;
|
||||
#else
|
||||
unsigned long dregs = 0UL;
|
||||
void __iomem *bregs = 0UL;
|
||||
#endif
|
||||
u8 tmp;
|
||||
|
||||
if (!mregs && !dregs) {
|
||||
if (!mregs && !dregs && !bregs) {
|
||||
prom_printf("Something wrong, clock regs not mapped yet.\n");
|
||||
prom_halt();
|
||||
}
|
||||
|
|
@ -589,6 +592,33 @@ static void __init set_system_time(void)
|
|||
day = MSTK_REG_DOM(mregs);
|
||||
mon = MSTK_REG_MONTH(mregs);
|
||||
year = MSTK_CVT_YEAR( MSTK_REG_YEAR(mregs) );
|
||||
} else if (bregs) {
|
||||
unsigned char val = readb(bregs + 0x0e);
|
||||
unsigned int century;
|
||||
|
||||
/* BQ4802 RTC chip. */
|
||||
|
||||
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);
|
||||
|
||||
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);
|
||||
|
||||
year += (century * 100);
|
||||
} else {
|
||||
/* Dallas 12887 RTC chip. */
|
||||
|
||||
|
|
@ -712,7 +742,8 @@ static int __init clock_model_matches(const char *model)
|
|||
strcmp(model, "m5819") &&
|
||||
strcmp(model, "m5819p") &&
|
||||
strcmp(model, "m5823") &&
|
||||
strcmp(model, "ds1287"))
|
||||
strcmp(model, "ds1287") &&
|
||||
strcmp(model, "bq4802"))
|
||||
return 0;
|
||||
|
||||
return 1;
|
||||
|
|
@ -722,9 +753,13 @@ static int __devinit clock_probe(struct of_device *op, const struct of_device_id
|
|||
{
|
||||
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;
|
||||
|
||||
if (!model)
|
||||
model = compat;
|
||||
|
||||
if (!model || !clock_model_matches(model))
|
||||
return -ENODEV;
|
||||
|
||||
|
|
@ -746,6 +781,8 @@ static int __devinit clock_probe(struct of_device *op, const struct of_device_id
|
|||
!strcmp(model, "m5819p") ||
|
||||
!strcmp(model, "m5823")) {
|
||||
ds1287_regs = (unsigned long) regs;
|
||||
} else if (!strcmp(model, "bq4802")) {
|
||||
bq4802_regs = regs;
|
||||
} else
|
||||
#endif
|
||||
if (model[5] == '0' && model[6] == '2') {
|
||||
|
|
@ -1070,8 +1107,10 @@ static int set_rtc_mmss(unsigned long nowtime)
|
|||
void __iomem *mregs = mstk48t02_regs;
|
||||
#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;
|
||||
u8 tmp;
|
||||
|
|
@ -1080,7 +1119,7 @@ static int set_rtc_mmss(unsigned long nowtime)
|
|||
* Not having a register set can lead to trouble.
|
||||
* Also starfire doesn't have a tod clock.
|
||||
*/
|
||||
if (!mregs && !dregs)
|
||||
if (!mregs && !dregs & !bregs)
|
||||
return -1;
|
||||
|
||||
if (mregs) {
|
||||
|
|
@ -1129,6 +1168,37 @@ static int set_rtc_mmss(unsigned long nowtime)
|
|||
|
||||
return -1;
|
||||
}
|
||||
} else if (bregs) {
|
||||
int retval = 0;
|
||||
unsigned char val = readb(bregs + 0x0e);
|
||||
|
||||
/* BQ4802 RTC chip. */
|
||||
|
||||
writeb(val | 0x08, bregs + 0x0e);
|
||||
|
||||
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;
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
writeb(val, bregs + 0x0e);
|
||||
|
||||
return retval;
|
||||
} else {
|
||||
int retval = 0;
|
||||
unsigned char save_control, save_freq_select;
|
||||
|
|
@ -1259,38 +1329,152 @@ static void to_tm(int tim, struct rtc_time *tm)
|
|||
/* Both Starfire and SUN4V give us seconds since Jan 1st, 1970,
|
||||
* aka Unix time. So we have to convert to/from rtc_time.
|
||||
*/
|
||||
static inline void mini_get_rtc_time(struct rtc_time *time)
|
||||
static void starfire_get_rtc_time(struct rtc_time *time)
|
||||
{
|
||||
unsigned long flags;
|
||||
u32 seconds;
|
||||
|
||||
spin_lock_irqsave(&rtc_lock, flags);
|
||||
seconds = 0;
|
||||
if (this_is_starfire)
|
||||
seconds = starfire_get_time();
|
||||
else if (tlb_type == hypervisor)
|
||||
seconds = hypervisor_get_time();
|
||||
spin_unlock_irqrestore(&rtc_lock, flags);
|
||||
u32 seconds = starfire_get_time();
|
||||
|
||||
to_tm(seconds, time);
|
||||
time->tm_year -= 1900;
|
||||
time->tm_mon -= 1;
|
||||
}
|
||||
|
||||
static inline int mini_set_rtc_time(struct rtc_time *time)
|
||||
static int starfire_set_rtc_time(struct rtc_time *time)
|
||||
{
|
||||
u32 seconds = mktime(time->tm_year + 1900, time->tm_mon + 1,
|
||||
time->tm_mday, time->tm_hour,
|
||||
time->tm_min, time->tm_sec);
|
||||
|
||||
return starfire_set_time(seconds);
|
||||
}
|
||||
|
||||
static void hypervisor_get_rtc_time(struct rtc_time *time)
|
||||
{
|
||||
u32 seconds = hypervisor_get_time();
|
||||
|
||||
to_tm(seconds, time);
|
||||
time->tm_year -= 1900;
|
||||
time->tm_mon -= 1;
|
||||
}
|
||||
|
||||
static int hypervisor_set_rtc_time(struct rtc_time *time)
|
||||
{
|
||||
u32 seconds = mktime(time->tm_year + 1900, time->tm_mon + 1,
|
||||
time->tm_mday, time->tm_hour,
|
||||
time->tm_min, time->tm_sec);
|
||||
|
||||
return hypervisor_set_time(seconds);
|
||||
}
|
||||
|
||||
static void bq4802_get_rtc_time(struct rtc_time *time)
|
||||
{
|
||||
unsigned char val = readb(bq4802_regs + 0x0e);
|
||||
unsigned int century;
|
||||
|
||||
writeb(val | 0x08, bq4802_regs + 0x0e);
|
||||
|
||||
time->tm_sec = readb(bq4802_regs + 0x00);
|
||||
time->tm_min = readb(bq4802_regs + 0x02);
|
||||
time->tm_hour = readb(bq4802_regs + 0x04);
|
||||
time->tm_mday = readb(bq4802_regs + 0x06);
|
||||
time->tm_mon = readb(bq4802_regs + 0x09);
|
||||
time->tm_year = readb(bq4802_regs + 0x0a);
|
||||
time->tm_wday = readb(bq4802_regs + 0x08);
|
||||
century = readb(bq4802_regs + 0x0f);
|
||||
|
||||
writeb(val, bq4802_regs + 0x0e);
|
||||
|
||||
BCD_TO_BIN(time->tm_sec);
|
||||
BCD_TO_BIN(time->tm_min);
|
||||
BCD_TO_BIN(time->tm_hour);
|
||||
BCD_TO_BIN(time->tm_mday);
|
||||
BCD_TO_BIN(time->tm_mon);
|
||||
BCD_TO_BIN(time->tm_year);
|
||||
BCD_TO_BIN(time->tm_wday);
|
||||
BCD_TO_BIN(century);
|
||||
|
||||
time->tm_year += (century * 100);
|
||||
time->tm_year -= 1900;
|
||||
|
||||
time->tm_mon--;
|
||||
}
|
||||
|
||||
static int bq4802_set_rtc_time(struct rtc_time *time)
|
||||
{
|
||||
unsigned char val = readb(bq4802_regs + 0x0e);
|
||||
unsigned char sec, min, hrs, day, mon, yrs, century;
|
||||
unsigned int year;
|
||||
|
||||
year = time->tm_year + 1900;
|
||||
century = year / 100;
|
||||
yrs = year % 100;
|
||||
|
||||
mon = time->tm_mon + 1; /* tm_mon starts at zero */
|
||||
day = time->tm_mday;
|
||||
hrs = time->tm_hour;
|
||||
min = time->tm_min;
|
||||
sec = time->tm_sec;
|
||||
|
||||
BIN_TO_BCD(sec);
|
||||
BIN_TO_BCD(min);
|
||||
BIN_TO_BCD(hrs);
|
||||
BIN_TO_BCD(day);
|
||||
BIN_TO_BCD(mon);
|
||||
BIN_TO_BCD(yrs);
|
||||
BIN_TO_BCD(century);
|
||||
|
||||
writeb(val | 0x08, bq4802_regs + 0x0e);
|
||||
|
||||
writeb(sec, bq4802_regs + 0x00);
|
||||
writeb(min, bq4802_regs + 0x02);
|
||||
writeb(hrs, bq4802_regs + 0x04);
|
||||
writeb(day, bq4802_regs + 0x06);
|
||||
writeb(mon, bq4802_regs + 0x09);
|
||||
writeb(yrs, bq4802_regs + 0x0a);
|
||||
writeb(century, bq4802_regs + 0x0f);
|
||||
|
||||
writeb(val, bq4802_regs + 0x0e);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct mini_rtc_ops {
|
||||
void (*get_rtc_time)(struct rtc_time *);
|
||||
int (*set_rtc_time)(struct rtc_time *);
|
||||
};
|
||||
|
||||
static struct mini_rtc_ops starfire_rtc_ops = {
|
||||
.get_rtc_time = starfire_get_rtc_time,
|
||||
.set_rtc_time = starfire_set_rtc_time,
|
||||
};
|
||||
|
||||
static struct mini_rtc_ops hypervisor_rtc_ops = {
|
||||
.get_rtc_time = hypervisor_get_rtc_time,
|
||||
.set_rtc_time = hypervisor_set_rtc_time,
|
||||
};
|
||||
|
||||
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 *mini_rtc_ops;
|
||||
|
||||
static inline void mini_get_rtc_time(struct rtc_time *time)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&rtc_lock, flags);
|
||||
mini_rtc_ops->get_rtc_time(time);
|
||||
spin_unlock_irqrestore(&rtc_lock, flags);
|
||||
}
|
||||
|
||||
static inline int mini_set_rtc_time(struct rtc_time *time)
|
||||
{
|
||||
unsigned long flags;
|
||||
int err;
|
||||
|
||||
spin_lock_irqsave(&rtc_lock, flags);
|
||||
err = -ENODEV;
|
||||
if (this_is_starfire)
|
||||
err = starfire_set_time(seconds);
|
||||
else if (tlb_type == hypervisor)
|
||||
err = hypervisor_set_time(seconds);
|
||||
err = mini_rtc_ops->set_rtc_time(time);
|
||||
spin_unlock_irqrestore(&rtc_lock, flags);
|
||||
|
||||
return err;
|
||||
|
|
@ -1391,7 +1575,13 @@ static int __init rtc_mini_init(void)
|
|||
{
|
||||
int retval;
|
||||
|
||||
if (tlb_type != hypervisor && !this_is_starfire)
|
||||
if (tlb_type == hypervisor)
|
||||
mini_rtc_ops = &hypervisor_rtc_ops;
|
||||
else if (this_is_starfire)
|
||||
mini_rtc_ops = &starfire_rtc_ops;
|
||||
else if (bq4802_regs)
|
||||
mini_rtc_ops = &bq4802_rtc_ops;
|
||||
else
|
||||
return -ENODEV;
|
||||
|
||||
printk(KERN_INFO "Mini RTC Driver\n");
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче