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Diffstat (limited to 'arch/powerpc/platforms/powermac/time.c')
-rw-r--r--arch/powerpc/platforms/powermac/time.c158
1 files changed, 34 insertions, 124 deletions
diff --git a/arch/powerpc/platforms/powermac/time.c b/arch/powerpc/platforms/powermac/time.c
index 8680bb69795d..b4426a35aca3 100644
--- a/arch/powerpc/platforms/powermac/time.c
+++ b/arch/powerpc/platforms/powermac/time.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Support for periodic interrupts (100 per second) and for getting
* the current time from the RTC on Power Macintoshes.
@@ -14,6 +15,7 @@
#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/string.h>
+#include <linux/string_choices.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/time.h>
@@ -23,16 +25,17 @@
#include <linux/interrupt.h>
#include <linux/hardirq.h>
#include <linux/rtc.h>
+#include <linux/of_address.h>
+#include <asm/early_ioremap.h>
#include <asm/sections.h>
-#include <asm/prom.h>
-#include <asm/io.h>
-#include <asm/pgtable.h>
#include <asm/machdep.h>
#include <asm/time.h>
#include <asm/nvram.h>
#include <asm/smu.h>
+#include "pmac.h"
+
#undef DEBUG
#ifdef DEBUG
@@ -41,9 +44,6 @@
#define DBG(x...)
#endif
-/* Apparently the RTC stores seconds since 1 Jan 1904 */
-#define RTC_OFFSET 2082844800
-
/*
* Calibrate the decrementer frequency with the VIA timer 1.
*/
@@ -68,7 +68,7 @@
long __init pmac_time_init(void)
{
s32 delta = 0;
-#ifdef CONFIG_NVRAM
+#if defined(CONFIG_NVRAM) && defined(CONFIG_PPC32)
int dst;
delta = ((s32)pmac_xpram_read(PMAC_XPRAM_MACHINE_LOC + 0x9)) << 16;
@@ -78,141 +78,39 @@ long __init pmac_time_init(void)
delta |= 0xFF000000UL;
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");
+ str_on_off(dst));
#endif
return delta;
}
-#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;
-}
-
-#define pmu_get_rtc_time(tm) to_rtc_time(pmu_get_time(), (tm))
-
-static int pmu_set_rtc_time(struct rtc_time *tm)
-{
- unsigned int nowtime;
- struct adb_request req;
-
- 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
-
#ifdef CONFIG_PMAC_SMU
-static unsigned long smu_get_time(void)
+static time64_t smu_get_time(void)
{
struct rtc_time tm;
if (smu_get_rtc_time(&tm, 1))
return 0;
- return from_rtc_time(&tm);
+ return rtc_tm_to_time64(&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)
+time64_t 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:
return cuda_get_time();
+#endif
+#ifdef CONFIG_ADB_PMU
case SYS_CTRLER_PMU:
return pmu_get_time();
+#endif
+#ifdef CONFIG_PMAC_SMU
case SYS_CTRLER_SMU:
return smu_get_time();
+#endif
default:
return 0;
}
@@ -222,15 +120,21 @@ void pmac_get_rtc_time(struct rtc_time *tm)
{
/* Get the time from the RTC, used only at boot time */
switch (sys_ctrler) {
+#ifdef CONFIG_ADB_CUDA
case SYS_CTRLER_CUDA:
- cuda_get_rtc_time(tm);
+ rtc_time64_to_tm(cuda_get_time(), tm);
break;
+#endif
+#ifdef CONFIG_ADB_PMU
case SYS_CTRLER_PMU:
- pmu_get_rtc_time(tm);
+ rtc_time64_to_tm(pmu_get_time(), tm);
break;
+#endif
+#ifdef CONFIG_PMAC_SMU
case SYS_CTRLER_SMU:
smu_get_rtc_time(tm, 1);
break;
+#endif
default:
;
}
@@ -239,12 +143,18 @@ void pmac_get_rtc_time(struct rtc_time *tm)
int pmac_set_rtc_time(struct rtc_time *tm)
{
switch (sys_ctrler) {
+#ifdef CONFIG_ADB_CUDA
case SYS_CTRLER_CUDA:
return cuda_set_rtc_time(tm);
+#endif
+#ifdef CONFIG_ADB_PMU
case SYS_CTRLER_PMU:
return pmu_set_rtc_time(tm);
+#endif
+#ifdef CONFIG_PMAC_SMU
case SYS_CTRLER_SMU:
return smu_set_rtc_time(tm, 1);
+#endif
default:
return -ENODEV;
}
@@ -255,7 +165,7 @@ int pmac_set_rtc_time(struct rtc_time *tm)
* Calibrate the decrementer register using VIA timer 1.
* This is used both on powermacs and CHRP machines.
*/
-int __init via_calibrate_decr(void)
+static int __init via_calibrate_decr(void)
{
struct device_node *vias;
volatile unsigned char __iomem *via;
@@ -273,7 +183,7 @@ int __init via_calibrate_decr(void)
return 0;
}
of_node_put(vias);
- via = ioremap(rsrc.start, resource_size(&rsrc));
+ via = early_ioremap(rsrc.start, resource_size(&rsrc));
if (via == NULL) {
printk(KERN_ERR "Failed to map VIA for timer calibration !\n");
return 0;
@@ -298,7 +208,7 @@ int __init via_calibrate_decr(void)
ppc_tb_freq = (dstart - dend) * 100 / 6;
- iounmap(via);
+ early_iounmap((void *)via, resource_size(&rsrc));
return 1;
}
generated by cgit (git 2.34.1) at 2025-12-25 09:43:54 +0000