Author: wma
Date: Wed Feb 21 08:13:17 2018
New Revision: 329702
URL: https://svnweb.freebsd.org/changeset/base/329702
Log:
PowerNV: add missing RTC_WRITE support
Add function which can store RTC values to OPAL.
Submitted by: Wojciech Macek <w...@semihalf.org>
Obtained from: Semihalf
Sponsored by: IBM, QCM Technologies
Modified:
head/sys/powerpc/powernv/opal_dev.c
Modified: head/sys/powerpc/powernv/opal_dev.c
==============================================================================
--- head/sys/powerpc/powernv/opal_dev.c Wed Feb 21 08:05:56 2018
(r329701)
+++ head/sys/powerpc/powernv/opal_dev.c Wed Feb 21 08:13:17 2018
(r329702)
@@ -191,6 +191,26 @@ bcd2bin32(int bcd)
}
static int
+bin2bcd32(int bin)
+{
+ int out = 0;
+ int tmp;
+
+ tmp = bin % 100;
+ out += bin2bcd(tmp) * 1;
+ bin = bin / 100;
+
+ tmp = bin % 100;
+ out += bin2bcd(tmp) * 100;
+ bin = bin / 100;
+
+ tmp = bin % 100;
+ out += bin2bcd(tmp) * 10000;
+
+ return (out);
+}
+
+static int
opal_gettime(device_t dev, struct timespec *ts)
{
int rv;
@@ -220,13 +240,42 @@ opal_gettime(device_t dev, struct timespec *ts)
ct.day = bcd2bin((ymd & 0x000000ff) >> 0);
ct.mon = bcd2bin((ymd & 0x0000ff00) >> 8);
ct.year = bcd2bin32((ymd & 0xffff0000) >> 16);
-
+
return (clock_ct_to_ts(&ct, ts));
}
static int
opal_settime(device_t dev, struct timespec *ts)
{
+ int rv;
+ struct clocktime ct;
+ uint32_t ymd = 0;
+ uint64_t hmsm = 0;
+
+ clock_ts_to_ct(ts, &ct);
+
+ ymd |= (uint32_t)bin2bcd(ct.day);
+ ymd |= ((uint32_t)bin2bcd(ct.mon) << 8);
+ ymd |= ((uint32_t)bin2bcd32(ct.year) << 16);
+
+ hmsm |= ((uint64_t)bin2bcd32(ct.nsec/1000) << 16);
+ hmsm |= ((uint64_t)bin2bcd(ct.sec) << 40);
+ hmsm |= ((uint64_t)bin2bcd(ct.min) << 48);
+ hmsm |= ((uint64_t)bin2bcd(ct.hour) << 56);
+
+ hmsm = htobe64(hmsm);
+ ymd = htobe32(ymd);
+
+ do {
+ rv = opal_call(OPAL_RTC_WRITE, vtophys(&ymd), vtophys(&hmsm));
+ if (rv == OPAL_BUSY_EVENT) {
+ rv = opal_call(OPAL_POLL_EVENTS, 0);
+ pause("opalrtc", 1);
+ }
+ } while (rv == OPAL_BUSY_EVENT);
+
+ if (rv != OPAL_SUCCESS)
+ return (ENXIO);
return (0);
}
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