diff options
Diffstat (limited to 'drivers/macintosh')
| -rw-r--r-- | drivers/macintosh/via-cuda.c | 35 | ||||
| -rw-r--r-- | drivers/macintosh/via-pmu.c | 33 |
2 files changed, 68 insertions, 0 deletions
diff --git a/drivers/macintosh/via-cuda.c b/drivers/macintosh/via-cuda.c index 98dd702eb867..bbec6ac0a966 100644 --- a/drivers/macintosh/via-cuda.c +++ b/drivers/macintosh/via-cuda.c @@ -766,3 +766,38 @@ cuda_input(unsigned char *buf, int nb) buf, nb, false); } } + +/* Offset between Unix time (1970-based) and Mac time (1904-based) */ +#define RTC_OFFSET 2082844800 + +time64_t cuda_get_time(void) +{ + struct adb_request req; + u32 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) + pr_err("%s: got %d byte reply\n", __func__, req.reply_len); + now = (req.reply[3] << 24) + (req.reply[4] << 16) + + (req.reply[5] << 8) + req.reply[6]; + return (time64_t)now - RTC_OFFSET; +} + +int cuda_set_rtc_time(struct rtc_time *tm) +{ + u32 now; + struct adb_request req; + + now = lower_32_bits(rtc_tm_to_time64(tm) + RTC_OFFSET); + if (cuda_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME, + now >> 24, now >> 16, now >> 8, now) < 0) + return -ENXIO; + while (!req.complete) + cuda_poll(); + if ((req.reply_len != 3) && (req.reply_len != 7)) + pr_err("%s: got %d byte reply\n", __func__, req.reply_len); + return 0; +} diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c index d72c450aebe5..60f57e2abf21 100644 --- a/drivers/macintosh/via-pmu.c +++ b/drivers/macintosh/via-pmu.c @@ -1737,6 +1737,39 @@ pmu_enable_irled(int on) pmu_wait_complete(&req); } +/* Offset between Unix time (1970-based) and Mac time (1904-based) */ +#define RTC_OFFSET 2082844800 + +time64_t pmu_get_time(void) +{ + struct adb_request req; + u32 now; + + if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0) + return 0; + pmu_wait_complete(&req); + if (req.reply_len != 4) + pr_err("%s: got %d byte reply\n", __func__, req.reply_len); + now = (req.reply[0] << 24) + (req.reply[1] << 16) + + (req.reply[2] << 8) + req.reply[3]; + return (time64_t)now - RTC_OFFSET; +} + +int pmu_set_rtc_time(struct rtc_time *tm) +{ + u32 now; + struct adb_request req; + + now = lower_32_bits(rtc_tm_to_time64(tm) + RTC_OFFSET); + if (pmu_request(&req, NULL, 5, PMU_SET_RTC, + now >> 24, now >> 16, now >> 8, now) < 0) + return -ENXIO; + pmu_wait_complete(&req); + if (req.reply_len != 0) + pr_err("%s: got %d byte reply\n", __func__, req.reply_len); + return 0; +} + void pmu_restart(void) { |