X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=arch%2Fpowerpc%2Fplatforms%2Fpowermac%2Ftime.c;h=48211ca134c3b3845c80af2a8ab58d9549ffa776;hb=HEAD;hp=3ee6d8aa14c4a6a606508a492193221f46c69283;hpb=143a1dec7e04e0a9712ff93e779aabfb21dfd97c;p=safe%2Fjmp%2Flinux-2.6 diff --git a/arch/powerpc/platforms/powermac/time.c b/arch/powerpc/platforms/powermac/time.c index 3ee6d8a..48211ca 100644 --- a/arch/powerpc/platforms/powermac/time.c +++ b/arch/powerpc/platforms/powermac/time.c @@ -6,8 +6,9 @@ * * Paul Mackerras August 1996. * Copyright (C) 1996 Paul Mackerras. + * Copyright (C) 2003-2005 Benjamin Herrenschmidt. + * */ -#include #include #include #include @@ -19,7 +20,9 @@ #include #include #include +#include #include +#include #include #include @@ -29,6 +32,15 @@ #include #include #include +#include + +#undef DEBUG + +#ifdef DEBUG +#define DBG(x...) printk(x) +#else +#define DBG(x...) +#endif /* Apparently the RTC stores seconds since 1 Jan 1904 */ #define RTC_OFFSET 2082844800 @@ -54,13 +66,10 @@ /* Bits in IFR and IER */ #define T1_INT 0x40 /* Timer 1 interrupt */ -extern struct timezone sys_tz; - -long __init -pmac_time_init(void) +long __init pmac_time_init(void) { -#ifdef CONFIG_NVRAM s32 delta = 0; +#ifdef CONFIG_NVRAM int dst; delta = ((s32)pmac_xpram_read(PMAC_XPRAM_MACHINE_LOC + 0x9)) << 16; @@ -71,124 +80,205 @@ pmac_time_init(void) dst = ((pmac_xpram_read(PMAC_XPRAM_MACHINE_LOC + 0x8) & 0x80) != 0); printk("GMT Delta read from XPRAM: %d minutes, DST: %s\n", delta/60, dst ? "on" : "off"); +#endif return delta; -#else +} + +#if defined(CONFIG_ADB_CUDA) || defined(CONFIG_ADB_PMU) +static void to_rtc_time(unsigned long now, struct rtc_time *tm) +{ + to_tm(now, tm); + tm->tm_year -= 1900; + tm->tm_mon -= 1; +} +#endif + +#if defined(CONFIG_ADB_CUDA) || defined(CONFIG_ADB_PMU) || \ + defined(CONFIG_PMAC_SMU) +static unsigned long from_rtc_time(struct rtc_time *tm) +{ + return mktime(tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday, + tm->tm_hour, tm->tm_min, tm->tm_sec); +} +#endif + +#ifdef CONFIG_ADB_CUDA +static unsigned long cuda_get_time(void) +{ + struct adb_request req; + unsigned int now; + + if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0) + return 0; + while (!req.complete) + cuda_poll(); + if (req.reply_len != 7) + printk(KERN_ERR "cuda_get_time: got %d byte reply\n", + req.reply_len); + now = (req.reply[3] << 24) + (req.reply[4] << 16) + + (req.reply[5] << 8) + req.reply[6]; + return ((unsigned long)now) - RTC_OFFSET; +} + +#define cuda_get_rtc_time(tm) to_rtc_time(cuda_get_time(), (tm)) + +static int cuda_set_rtc_time(struct rtc_time *tm) +{ + unsigned int nowtime; + struct adb_request req; + + nowtime = from_rtc_time(tm) + RTC_OFFSET; + if (cuda_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME, + nowtime >> 24, nowtime >> 16, nowtime >> 8, + nowtime) < 0) + return -ENXIO; + while (!req.complete) + cuda_poll(); + if ((req.reply_len != 3) && (req.reply_len != 7)) + printk(KERN_ERR "cuda_set_rtc_time: got %d byte reply\n", + req.reply_len); return 0; +} + +#else +#define cuda_get_time() 0 +#define cuda_get_rtc_time(tm) +#define cuda_set_rtc_time(tm) 0 #endif + +#ifdef CONFIG_ADB_PMU +static unsigned long pmu_get_time(void) +{ + struct adb_request req; + unsigned int now; + + if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0) + return 0; + pmu_wait_complete(&req); + if (req.reply_len != 4) + printk(KERN_ERR "pmu_get_time: got %d byte reply from PMU\n", + req.reply_len); + now = (req.reply[0] << 24) + (req.reply[1] << 16) + + (req.reply[2] << 8) + req.reply[3]; + return ((unsigned long)now) - RTC_OFFSET; } -unsigned long pmac_get_boot_time(void) +#define pmu_get_rtc_time(tm) to_rtc_time(pmu_get_time(), (tm)) + +static int pmu_set_rtc_time(struct rtc_time *tm) { -#if defined(CONFIG_ADB_CUDA) || defined(CONFIG_ADB_PMU) + unsigned int nowtime; struct adb_request req; - unsigned long now; + + nowtime = from_rtc_time(tm) + RTC_OFFSET; + if (pmu_request(&req, NULL, 5, PMU_SET_RTC, nowtime >> 24, + nowtime >> 16, nowtime >> 8, nowtime) < 0) + return -ENXIO; + pmu_wait_complete(&req); + if (req.reply_len != 0) + printk(KERN_ERR "pmu_set_rtc_time: %d byte reply from PMU\n", + req.reply_len); + return 0; +} + +#else +#define pmu_get_time() 0 +#define pmu_get_rtc_time(tm) +#define pmu_set_rtc_time(tm) 0 #endif - /* Get the time from the RTC */ +#ifdef CONFIG_PMAC_SMU +static unsigned long smu_get_time(void) +{ + struct rtc_time tm; + + if (smu_get_rtc_time(&tm, 1)) + return 0; + return from_rtc_time(&tm); +} + +#else +#define smu_get_time() 0 +#define smu_get_rtc_time(tm, spin) +#define smu_set_rtc_time(tm, spin) 0 +#endif + +/* Can't be __init, it's called when suspending and resuming */ +unsigned long pmac_get_boot_time(void) +{ + /* Get the time from the RTC, used only at boot time */ switch (sys_ctrler) { -#ifdef CONFIG_ADB_CUDA case SYS_CTRLER_CUDA: - if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0) - return 0; - while (!req.complete) - cuda_poll(); - if (req.reply_len != 7) - printk(KERN_ERR "pmac_get_rtc_time: got %d byte reply\n", - req.reply_len); - now = (req.reply[3] << 24) + (req.reply[4] << 16) - + (req.reply[5] << 8) + req.reply[6]; - return now - RTC_OFFSET; -#endif /* CONFIG_ADB_CUDA */ -#ifdef CONFIG_ADB_PMU + return cuda_get_time(); case SYS_CTRLER_PMU: - if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0) - return 0; - while (!req.complete) - pmu_poll(); - if (req.reply_len != 4) - printk(KERN_ERR "pmac_get_rtc_time: got %d byte reply\n", - req.reply_len); - now = (req.reply[0] << 24) + (req.reply[1] << 16) - + (req.reply[2] << 8) + req.reply[3]; - return now - RTC_OFFSET; -#endif /* CONFIG_ADB_PMU */ - default: ; + return pmu_get_time(); + case SYS_CTRLER_SMU: + return smu_get_time(); + default: + return 0; } - return 0; } void pmac_get_rtc_time(struct rtc_time *tm) { - unsigned long now; - - now = pmac_get_boot_time(); - to_tm(now, tm); - tm->tm_year -= 1900; - tm->tm_mon -= 1; /* month is 0-based */ + /* Get the time from the RTC, used only at boot time */ + switch (sys_ctrler) { + case SYS_CTRLER_CUDA: + cuda_get_rtc_time(tm); + break; + case SYS_CTRLER_PMU: + pmu_get_rtc_time(tm); + break; + case SYS_CTRLER_SMU: + smu_get_rtc_time(tm, 1); + break; + default: + ; + } } int pmac_set_rtc_time(struct rtc_time *tm) { - unsigned long nowtime; -#if defined(CONFIG_ADB_CUDA) || defined(CONFIG_ADB_PMU) - struct adb_request req; -#endif - - nowtime = mktime(tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday, - tm->tm_hour, tm->tm_min, tm->tm_sec); - nowtime += RTC_OFFSET; - switch (sys_ctrler) { -#ifdef CONFIG_ADB_CUDA case SYS_CTRLER_CUDA: - if (cuda_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME, - nowtime >> 24, nowtime >> 16, nowtime >> 8, - nowtime) < 0) - return 0; - while (!req.complete) - cuda_poll(); - if ((req.reply_len != 3) && (req.reply_len != 7)) - printk(KERN_ERR "pmac_set_rtc_time: got %d byte reply\n", - req.reply_len); - return 1; -#endif /* CONFIG_ADB_CUDA */ -#ifdef CONFIG_ADB_PMU + return cuda_set_rtc_time(tm); case SYS_CTRLER_PMU: - if (pmu_request(&req, NULL, 5, PMU_SET_RTC, - nowtime >> 24, nowtime >> 16, nowtime >> 8, nowtime) < 0) - return 0; - while (!req.complete) - pmu_poll(); - if (req.reply_len != 0) - printk(KERN_ERR "pmac_set_rtc_time: got %d byte reply\n", - req.reply_len); - return 1; -#endif /* CONFIG_ADB_PMU */ + return pmu_set_rtc_time(tm); + case SYS_CTRLER_SMU: + return smu_set_rtc_time(tm, 1); default: - return 0; + return -ENODEV; } } +#ifdef CONFIG_PPC32 /* * Calibrate the decrementer register using VIA timer 1. * This is used both on powermacs and CHRP machines. */ -int __init -via_calibrate_decr(void) +int __init via_calibrate_decr(void) { struct device_node *vias; volatile unsigned char __iomem *via; int count = VIA_TIMER_FREQ_6 / 100; unsigned int dstart, dend; + struct resource rsrc; - vias = find_devices("via-cuda"); - if (vias == 0) - vias = find_devices("via-pmu"); - if (vias == 0) - vias = find_devices("via"); - if (vias == 0 || vias->n_addrs == 0) + vias = of_find_node_by_name(NULL, "via-cuda"); + if (vias == NULL) + vias = of_find_node_by_name(NULL, "via-pmu"); + if (vias == NULL) + vias = of_find_node_by_name(NULL, "via"); + if (vias == NULL || of_address_to_resource(vias, 0, &rsrc)) { + of_node_put(vias); return 0; - via = ioremap(vias->addrs[0].address, vias->addrs[0].size); + } + of_node_put(vias); + via = ioremap(rsrc.start, rsrc.end - rsrc.start + 1); + if (via == NULL) { + printk(KERN_ERR "Failed to map VIA for timer calibration !\n"); + return 0; + } /* set timer 1 for continuous interrupts */ out_8(&via[ACR], (via[ACR] & ~T1MODE) | T1MODE_CONT); @@ -207,73 +297,29 @@ via_calibrate_decr(void) ; dend = get_dec(); - tb_ticks_per_jiffy = (dstart - dend) / ((6 * HZ)/100); - tb_to_us = mulhwu_scale_factor(dstart - dend, 60000); - - printk(KERN_INFO "via_calibrate_decr: ticks per jiffy = %u (%u ticks)\n", - tb_ticks_per_jiffy, dstart - dend); + ppc_tb_freq = (dstart - dend) * 100 / 6; iounmap(via); - - return 1; -} -#ifdef CONFIG_PM -/* - * Reset the time after a sleep. - */ -static int -time_sleep_notify(struct pmu_sleep_notifier *self, int when) -{ - static unsigned long time_diff; - unsigned long flags; - unsigned long seq; - - switch (when) { - case PBOOK_SLEEP_NOW: - do { - seq = read_seqbegin_irqsave(&xtime_lock, flags); - time_diff = xtime.tv_sec - pmac_get_boot_time(); - } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); - break; - case PBOOK_WAKE: - write_seqlock_irqsave(&xtime_lock, flags); - xtime.tv_sec = pmac_get_rtc_time() + time_diff; - xtime.tv_nsec = 0; - last_rtc_update = xtime.tv_sec; - write_sequnlock_irqrestore(&xtime_lock, flags); - break; - } - return PBOOK_SLEEP_OK; + return 1; } - -static struct pmu_sleep_notifier time_sleep_notifier = { - time_sleep_notify, SLEEP_LEVEL_MISC, -}; -#endif /* CONFIG_PM */ +#endif /* * Query the OF and get the decr frequency. - * This was taken from the pmac time_init() when merging the prep/pmac - * time functions. */ -void __init -pmac_calibrate_decr(void) +void __init pmac_calibrate_decr(void) { - struct device_node *cpu; - unsigned int freq, *fp; - -#ifdef CONFIG_PM - pmu_register_sleep_notifier(&time_sleep_notifier); -#endif /* CONFIG_PM */ + generic_calibrate_decr(); +#ifdef CONFIG_PPC32 /* We assume MacRISC2 machines have correct device-tree * calibration. That's better since the VIA itself seems * to be slightly off. --BenH */ - if (!machine_is_compatible("MacRISC2") && - !machine_is_compatible("MacRISC3") && - !machine_is_compatible("MacRISC4")) + if (!of_machine_is_compatible("MacRISC2") && + !of_machine_is_compatible("MacRISC3") && + !of_machine_is_compatible("MacRISC4")) if (via_calibrate_decr()) return; @@ -282,22 +328,8 @@ pmac_calibrate_decr(void) * probably implement calibration based on the KL timer on these * machines anyway... -BenH */ - if (machine_is_compatible("PowerMac3,5")) + if (of_machine_is_compatible("PowerMac3,5")) if (via_calibrate_decr()) return; - /* - * The cpu node should have a timebase-frequency property - * to tell us the rate at which the decrementer counts. - */ - cpu = find_type_devices("cpu"); - if (cpu == 0) - panic("can't find cpu node in time_init"); - fp = (unsigned int *) get_property(cpu, "timebase-frequency", NULL); - if (fp == 0) - panic("can't get cpu timebase frequency"); - freq = *fp; - printk("time_init: decrementer frequency = %u.%.6u MHz\n", - freq/1000000, freq%1000000); - tb_ticks_per_jiffy = freq / HZ; - tb_to_us = mulhwu_scale_factor(freq, 1000000); +#endif }