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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-25 18:30:06 +00:00
[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
parent
95d71e663e
commit
d037e0532e
1 changed files with 211 additions and 21 deletions
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@ -55,6 +55,7 @@ DEFINE_SPINLOCK(rtc_lock);
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void __iomem *mstk48t02_regs = NULL;
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#ifdef CONFIG_PCI
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unsigned long ds1287_regs = 0UL;
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static void __iomem *bq4802_regs;
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#endif
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static void __iomem *mstk48t08_regs;
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@ -565,12 +566,14 @@ static void __init set_system_time(void)
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void __iomem *mregs = mstk48t02_regs;
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#ifdef CONFIG_PCI
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unsigned long dregs = ds1287_regs;
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void __iomem *bregs = bq4802_regs;
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#else
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unsigned long dregs = 0UL;
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void __iomem *bregs = 0UL;
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#endif
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u8 tmp;
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if (!mregs && !dregs) {
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if (!mregs && !dregs && !bregs) {
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prom_printf("Something wrong, clock regs not mapped yet.\n");
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prom_halt();
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}
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@ -589,6 +592,33 @@ static void __init set_system_time(void)
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day = MSTK_REG_DOM(mregs);
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mon = MSTK_REG_MONTH(mregs);
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year = MSTK_CVT_YEAR( MSTK_REG_YEAR(mregs) );
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} else if (bregs) {
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unsigned char val = readb(bregs + 0x0e);
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unsigned int century;
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/* BQ4802 RTC chip. */
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writeb(val | 0x08, bregs + 0x0e);
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sec = readb(bregs + 0x00);
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min = readb(bregs + 0x02);
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hour = readb(bregs + 0x04);
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day = readb(bregs + 0x06);
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mon = readb(bregs + 0x09);
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year = readb(bregs + 0x0a);
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century = readb(bregs + 0x0f);
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writeb(val, bregs + 0x0e);
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BCD_TO_BIN(sec);
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BCD_TO_BIN(min);
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BCD_TO_BIN(hour);
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BCD_TO_BIN(day);
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BCD_TO_BIN(mon);
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BCD_TO_BIN(year);
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BCD_TO_BIN(century);
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year += (century * 100);
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} else {
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/* Dallas 12887 RTC chip. */
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@ -712,7 +742,8 @@ static int __init clock_model_matches(const char *model)
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strcmp(model, "m5819") &&
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strcmp(model, "m5819p") &&
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strcmp(model, "m5823") &&
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strcmp(model, "ds1287"))
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strcmp(model, "ds1287") &&
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strcmp(model, "bq4802"))
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return 0;
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return 1;
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@ -722,9 +753,13 @@ static int __devinit clock_probe(struct of_device *op, const struct of_device_id
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{
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struct device_node *dp = op->node;
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const char *model = of_get_property(dp, "model", NULL);
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const char *compat = of_get_property(dp, "compatible", NULL);
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unsigned long size, flags;
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void __iomem *regs;
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if (!model)
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model = compat;
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if (!model || !clock_model_matches(model))
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return -ENODEV;
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@ -746,6 +781,8 @@ static int __devinit clock_probe(struct of_device *op, const struct of_device_id
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!strcmp(model, "m5819p") ||
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!strcmp(model, "m5823")) {
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ds1287_regs = (unsigned long) regs;
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} else if (!strcmp(model, "bq4802")) {
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bq4802_regs = regs;
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} else
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#endif
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if (model[5] == '0' && model[6] == '2') {
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@ -1070,8 +1107,10 @@ static int set_rtc_mmss(unsigned long nowtime)
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void __iomem *mregs = mstk48t02_regs;
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#ifdef CONFIG_PCI
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unsigned long dregs = ds1287_regs;
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void __iomem *bregs = bq4802_regs;
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#else
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unsigned long dregs = 0UL;
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void __iomem *bregs = 0UL;
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#endif
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unsigned long flags;
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u8 tmp;
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@ -1080,7 +1119,7 @@ static int set_rtc_mmss(unsigned long nowtime)
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* Not having a register set can lead to trouble.
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* Also starfire doesn't have a tod clock.
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*/
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if (!mregs && !dregs)
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if (!mregs && !dregs & !bregs)
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return -1;
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if (mregs) {
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@ -1129,6 +1168,37 @@ static int set_rtc_mmss(unsigned long nowtime)
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return -1;
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}
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} else if (bregs) {
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int retval = 0;
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unsigned char val = readb(bregs + 0x0e);
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/* BQ4802 RTC chip. */
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writeb(val | 0x08, bregs + 0x0e);
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chip_minutes = readb(bregs + 0x02);
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BCD_TO_BIN(chip_minutes);
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real_seconds = nowtime % 60;
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real_minutes = nowtime / 60;
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if (((abs(real_minutes - chip_minutes) + 15)/30) & 1)
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real_minutes += 30;
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real_minutes %= 60;
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if (abs(real_minutes - chip_minutes) < 30) {
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BIN_TO_BCD(real_seconds);
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BIN_TO_BCD(real_minutes);
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writeb(real_seconds, bregs + 0x00);
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writeb(real_minutes, bregs + 0x02);
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} else {
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printk(KERN_WARNING
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"set_rtc_mmss: can't update from %d to %d\n",
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chip_minutes, real_minutes);
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retval = -1;
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}
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writeb(val, bregs + 0x0e);
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return retval;
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} else {
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int retval = 0;
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unsigned char save_control, save_freq_select;
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@ -1259,38 +1329,152 @@ static void to_tm(int tim, struct rtc_time *tm)
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/* Both Starfire and SUN4V give us seconds since Jan 1st, 1970,
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* aka Unix time. So we have to convert to/from rtc_time.
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*/
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static inline void mini_get_rtc_time(struct rtc_time *time)
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static void starfire_get_rtc_time(struct rtc_time *time)
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{
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unsigned long flags;
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u32 seconds;
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spin_lock_irqsave(&rtc_lock, flags);
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seconds = 0;
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if (this_is_starfire)
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seconds = starfire_get_time();
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else if (tlb_type == hypervisor)
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seconds = hypervisor_get_time();
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spin_unlock_irqrestore(&rtc_lock, flags);
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u32 seconds = starfire_get_time();
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to_tm(seconds, time);
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time->tm_year -= 1900;
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time->tm_mon -= 1;
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}
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static inline int mini_set_rtc_time(struct rtc_time *time)
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static int starfire_set_rtc_time(struct rtc_time *time)
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{
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u32 seconds = mktime(time->tm_year + 1900, time->tm_mon + 1,
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time->tm_mday, time->tm_hour,
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time->tm_min, time->tm_sec);
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return starfire_set_time(seconds);
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}
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static void hypervisor_get_rtc_time(struct rtc_time *time)
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{
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u32 seconds = hypervisor_get_time();
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to_tm(seconds, time);
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time->tm_year -= 1900;
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time->tm_mon -= 1;
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}
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static int hypervisor_set_rtc_time(struct rtc_time *time)
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{
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u32 seconds = mktime(time->tm_year + 1900, time->tm_mon + 1,
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time->tm_mday, time->tm_hour,
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time->tm_min, time->tm_sec);
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return hypervisor_set_time(seconds);
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}
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static void bq4802_get_rtc_time(struct rtc_time *time)
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{
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unsigned char val = readb(bq4802_regs + 0x0e);
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unsigned int century;
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writeb(val | 0x08, bq4802_regs + 0x0e);
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time->tm_sec = readb(bq4802_regs + 0x00);
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time->tm_min = readb(bq4802_regs + 0x02);
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time->tm_hour = readb(bq4802_regs + 0x04);
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time->tm_mday = readb(bq4802_regs + 0x06);
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time->tm_mon = readb(bq4802_regs + 0x09);
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time->tm_year = readb(bq4802_regs + 0x0a);
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time->tm_wday = readb(bq4802_regs + 0x08);
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century = readb(bq4802_regs + 0x0f);
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writeb(val, bq4802_regs + 0x0e);
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BCD_TO_BIN(time->tm_sec);
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BCD_TO_BIN(time->tm_min);
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BCD_TO_BIN(time->tm_hour);
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BCD_TO_BIN(time->tm_mday);
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BCD_TO_BIN(time->tm_mon);
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BCD_TO_BIN(time->tm_year);
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BCD_TO_BIN(time->tm_wday);
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BCD_TO_BIN(century);
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time->tm_year += (century * 100);
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time->tm_year -= 1900;
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time->tm_mon--;
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}
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static int bq4802_set_rtc_time(struct rtc_time *time)
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{
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unsigned char val = readb(bq4802_regs + 0x0e);
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unsigned char sec, min, hrs, day, mon, yrs, century;
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unsigned int year;
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year = time->tm_year + 1900;
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century = year / 100;
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yrs = year % 100;
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mon = time->tm_mon + 1; /* tm_mon starts at zero */
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day = time->tm_mday;
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hrs = time->tm_hour;
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min = time->tm_min;
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sec = time->tm_sec;
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BIN_TO_BCD(sec);
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BIN_TO_BCD(min);
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BIN_TO_BCD(hrs);
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BIN_TO_BCD(day);
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BIN_TO_BCD(mon);
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BIN_TO_BCD(yrs);
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BIN_TO_BCD(century);
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writeb(val | 0x08, bq4802_regs + 0x0e);
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writeb(sec, bq4802_regs + 0x00);
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writeb(min, bq4802_regs + 0x02);
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writeb(hrs, bq4802_regs + 0x04);
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writeb(day, bq4802_regs + 0x06);
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writeb(mon, bq4802_regs + 0x09);
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writeb(yrs, bq4802_regs + 0x0a);
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writeb(century, bq4802_regs + 0x0f);
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writeb(val, bq4802_regs + 0x0e);
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return 0;
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}
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struct mini_rtc_ops {
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void (*get_rtc_time)(struct rtc_time *);
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int (*set_rtc_time)(struct rtc_time *);
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};
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static struct mini_rtc_ops starfire_rtc_ops = {
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.get_rtc_time = starfire_get_rtc_time,
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.set_rtc_time = starfire_set_rtc_time,
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};
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static struct mini_rtc_ops hypervisor_rtc_ops = {
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.get_rtc_time = hypervisor_get_rtc_time,
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.set_rtc_time = hypervisor_set_rtc_time,
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};
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static struct mini_rtc_ops bq4802_rtc_ops = {
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.get_rtc_time = bq4802_get_rtc_time,
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.set_rtc_time = bq4802_set_rtc_time,
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};
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static struct mini_rtc_ops *mini_rtc_ops;
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static inline void mini_get_rtc_time(struct rtc_time *time)
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{
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unsigned long flags;
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spin_lock_irqsave(&rtc_lock, flags);
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mini_rtc_ops->get_rtc_time(time);
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spin_unlock_irqrestore(&rtc_lock, flags);
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}
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static inline int mini_set_rtc_time(struct rtc_time *time)
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{
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unsigned long flags;
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int err;
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spin_lock_irqsave(&rtc_lock, flags);
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err = -ENODEV;
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if (this_is_starfire)
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err = starfire_set_time(seconds);
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else if (tlb_type == hypervisor)
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err = hypervisor_set_time(seconds);
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err = mini_rtc_ops->set_rtc_time(time);
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spin_unlock_irqrestore(&rtc_lock, flags);
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return err;
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@ -1391,7 +1575,13 @@ static int __init rtc_mini_init(void)
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{
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int retval;
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if (tlb_type != hypervisor && !this_is_starfire)
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if (tlb_type == hypervisor)
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mini_rtc_ops = &hypervisor_rtc_ops;
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else if (this_is_starfire)
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mini_rtc_ops = &starfire_rtc_ops;
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else if (bq4802_regs)
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mini_rtc_ops = &bq4802_rtc_ops;
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else
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return -ENODEV;
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printk(KERN_INFO "Mini RTC Driver\n");
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