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path: root/sys/arm/allwinner/aw_rtc.c
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Diffstat (limited to 'sys/arm/allwinner/aw_rtc.c')
-rw-r--r--sys/arm/allwinner/aw_rtc.c139
1 files changed, 104 insertions, 35 deletions
diff --git a/sys/arm/allwinner/aw_rtc.c b/sys/arm/allwinner/aw_rtc.c
index 5ac993085847..266d21b13993 100644
--- a/sys/arm/allwinner/aw_rtc.c
+++ b/sys/arm/allwinner/aw_rtc.c
@@ -1,4 +1,5 @@
/*-
+ * Copyright (c) 2019 Emmanuel Vadot <manu@FreeBSD.Org>
* Copyright (c) 2016 Vladimir Belian <fate10@gmail.com>
* All rights reserved.
*
@@ -43,6 +44,8 @@ __FBSDID("$FreeBSD$");
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
+#include <dev/extres/clk/clk_fixed.h>
+
#include <arm/allwinner/aw_machdep.h>
#include "clock_if.h"
@@ -62,7 +65,7 @@ __FBSDID("$FreeBSD$");
#define LOSC_MAGIC 0x16aa0000
#define LOSC_BUSY_MASK 0x00000380
-#define IS_SUN7I (sc->type == A20_RTC)
+#define IS_SUN7I (sc->conf->is_a20 == true)
#define YEAR_MIN (IS_SUN7I ? 1970 : 2010)
#define YEAR_MAX (IS_SUN7I ? 2100 : 2073)
@@ -92,27 +95,69 @@ __FBSDID("$FreeBSD$");
#define RTC_READ(sc, reg) bus_read_4((sc)->res, (reg))
#define RTC_WRITE(sc, reg, val) bus_write_4((sc)->res, (reg), (val))
-#define IS_LEAP_YEAR(y) \
- (((y) % 400) == 0 || (((y) % 100) != 0 && ((y) % 4) == 0))
+#define IS_LEAP_YEAR(y) (((y) % 400) == 0 || (((y) % 100) != 0 && ((y) % 4) == 0))
+
+struct aw_rtc_conf {
+ uint64_t iosc_freq;
+ bus_size_t rtc_date;
+ bus_size_t rtc_time;
+ bus_size_t rtc_losc_sta;
+ bool is_a20;
+};
+
+struct aw_rtc_conf a10_conf = {
+ .rtc_date = A10_RTC_DATE_REG,
+ .rtc_time = A10_RTC_TIME_REG,
+ .rtc_losc_sta = LOSC_CTRL_REG,
+};
+
+struct aw_rtc_conf a20_conf = {
+ .rtc_date = A10_RTC_DATE_REG,
+ .rtc_time = A10_RTC_TIME_REG,
+ .rtc_losc_sta = LOSC_CTRL_REG,
+ .is_a20 = true,
+};
+
+struct aw_rtc_conf a31_conf = {
+ .iosc_freq = 650000, /* between 600 and 700 Khz */
+ .rtc_date = A31_RTC_DATE_REG,
+ .rtc_time = A31_RTC_TIME_REG,
+ .rtc_losc_sta = A31_LOSC_AUTO_SWT_STA,
+};
-#define A10_RTC 1
-#define A20_RTC 2
-#define A31_RTC 3
+struct aw_rtc_conf h3_conf = {
+ .iosc_freq = 16000000,
+ .rtc_date = A31_RTC_DATE_REG,
+ .rtc_time = A31_RTC_TIME_REG,
+ .rtc_losc_sta = A31_LOSC_AUTO_SWT_STA,
+};
static struct ofw_compat_data compat_data[] = {
- { "allwinner,sun4i-a10-rtc", A10_RTC },
- { "allwinner,sun7i-a20-rtc", A20_RTC },
- { "allwinner,sun6i-a31-rtc", A31_RTC },
+ { "allwinner,sun4i-a10-rtc", (uintptr_t) &a10_conf },
+ { "allwinner,sun7i-a20-rtc", (uintptr_t) &a20_conf },
+ { "allwinner,sun6i-a31-rtc", (uintptr_t) &a31_conf },
+ { "allwinner,sun8i-h3-rtc", (uintptr_t) &h3_conf },
+ { "allwinner,sun50i-h5-rtc", (uintptr_t) &h3_conf },
{ NULL, 0 }
};
struct aw_rtc_softc {
struct resource *res;
+ struct aw_rtc_conf *conf;
int type;
- bus_size_t rtc_date;
- bus_size_t rtc_time;
};
+static struct clk_fixed_def aw_rtc_osc32k = {
+ .clkdef.id = 0,
+ .freq = 32768,
+};
+
+static struct clk_fixed_def aw_rtc_iosc = {
+ .clkdef.id = 2,
+};
+
+static void aw_rtc_install_clocks(struct aw_rtc_softc *sc, device_t dev);
+
static int aw_rtc_probe(device_t dev);
static int aw_rtc_attach(device_t dev);
static int aw_rtc_detach(device_t dev);
@@ -140,8 +185,9 @@ static driver_t aw_rtc_driver = {
static devclass_t aw_rtc_devclass;
EARLY_DRIVER_MODULE(aw_rtc, simplebus, aw_rtc_driver, aw_rtc_devclass, 0, 0,
- BUS_PASS_TIMER + BUS_PASS_ORDER_MIDDLE);
-
+ BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
+MODULE_VERSION(aw_rtc, 1);
+SIMPLEBUS_PNP_INFO(compat_data);
static int
aw_rtc_probe(device_t dev)
@@ -161,7 +207,6 @@ static int
aw_rtc_attach(device_t dev)
{
struct aw_rtc_softc *sc = device_get_softc(dev);
- bus_size_t rtc_losc_sta;
uint32_t val;
int rid = 0;
@@ -171,20 +216,7 @@ aw_rtc_attach(device_t dev)
return (ENXIO);
}
- sc->type = ofw_bus_search_compatible(dev, compat_data)->ocd_data;
- switch (sc->type) {
- case A10_RTC:
- case A20_RTC:
- sc->rtc_date = A10_RTC_DATE_REG;
- sc->rtc_time = A10_RTC_TIME_REG;
- rtc_losc_sta = LOSC_CTRL_REG;
- break;
- case A31_RTC:
- sc->rtc_date = A31_RTC_DATE_REG;
- sc->rtc_time = A31_RTC_TIME_REG;
- rtc_losc_sta = A31_LOSC_AUTO_SWT_STA;
- break;
- }
+ sc->conf = (struct aw_rtc_conf *)ofw_bus_search_compatible(dev, compat_data)->ocd_data;
val = RTC_READ(sc, LOSC_CTRL_REG);
val |= LOSC_AUTO_SW_EN;
val |= LOSC_MAGIC | LOSC_GSM | LOSC_OSC_SRC;
@@ -193,13 +225,15 @@ aw_rtc_attach(device_t dev)
DELAY(100);
if (bootverbose) {
- val = RTC_READ(sc, rtc_losc_sta);
+ val = RTC_READ(sc, sc->conf->rtc_losc_sta);
if ((val & LOSC_OSC_SRC) == 0)
device_printf(dev, "Using internal oscillator\n");
else
device_printf(dev, "Using external oscillator\n");
}
+ aw_rtc_install_clocks(sc, dev);
+
clock_register(dev, RTC_RES_US);
return (0);
@@ -212,6 +246,41 @@ aw_rtc_detach(device_t dev)
return (EBUSY);
}
+static void
+aw_rtc_install_clocks(struct aw_rtc_softc *sc, device_t dev) {
+ struct clkdom *clkdom;
+ const char **clknames;
+ phandle_t node;
+ int nclocks;
+
+ node = ofw_bus_get_node(dev);
+ nclocks = ofw_bus_string_list_to_array(node, "clock-output-names", &clknames);
+ /* No clocks to export */
+ if (nclocks <= 0)
+ return;
+
+ if (nclocks != 3) {
+ device_printf(dev, "Having only %d clocks instead of 3, aborting\n", nclocks);
+ return;
+ }
+
+ clkdom = clkdom_create(dev);
+
+ aw_rtc_osc32k.clkdef.name = clknames[0];
+ if (clknode_fixed_register(clkdom, &aw_rtc_osc32k) != 0)
+ device_printf(dev, "Cannot register osc32k clock\n");
+
+ aw_rtc_iosc.clkdef.name = clknames[2];
+ aw_rtc_iosc.freq = sc->conf->iosc_freq;
+ if (clknode_fixed_register(clkdom, &aw_rtc_iosc) != 0)
+ device_printf(dev, "Cannot register iosc clock\n");
+
+ clkdom_finit(clkdom);
+
+ if (bootverbose)
+ clkdom_dump(clkdom);
+}
+
static int
aw_rtc_gettime(device_t dev, struct timespec *ts)
{
@@ -219,11 +288,11 @@ aw_rtc_gettime(device_t dev, struct timespec *ts)
struct clocktime ct;
uint32_t rdate, rtime;
- rdate = RTC_READ(sc, sc->rtc_date);
- rtime = RTC_READ(sc, sc->rtc_time);
+ rdate = RTC_READ(sc, sc->conf->rtc_date);
+ rtime = RTC_READ(sc, sc->conf->rtc_time);
if ((rtime & TIME_MASK) == 0)
- rdate = RTC_READ(sc, sc->rtc_date);
+ rdate = RTC_READ(sc, sc->conf->rtc_date);
ct.sec = GET_SEC_VALUE(rtime);
ct.min = GET_MIN_VALUE(rtime);
@@ -265,7 +334,7 @@ aw_rtc_settime(device_t dev, struct timespec *ts)
DELAY(1);
}
/* reset time register to avoid unexpected date increment */
- RTC_WRITE(sc, sc->rtc_time, 0);
+ RTC_WRITE(sc, sc->conf->rtc_time, 0);
rdate = SET_DAY_VALUE(ct.day) | SET_MON_VALUE(ct.mon) |
SET_YEAR_VALUE(ct.year - YEAR_OFFSET) |
@@ -281,7 +350,7 @@ aw_rtc_settime(device_t dev, struct timespec *ts)
}
DELAY(1);
}
- RTC_WRITE(sc, sc->rtc_date, rdate);
+ RTC_WRITE(sc, sc->conf->rtc_date, rdate);
for (clk = 0; RTC_READ(sc, LOSC_CTRL_REG) & LOSC_BUSY_MASK; clk++) {
if (clk > RTC_TIMEOUT) {
@@ -290,7 +359,7 @@ aw_rtc_settime(device_t dev, struct timespec *ts)
}
DELAY(1);
}
- RTC_WRITE(sc, sc->rtc_time, rtime);
+ RTC_WRITE(sc, sc->conf->rtc_time, rtime);
DELAY(RTC_TIMEOUT);
generated by cgit v1.3 (git 2.53.0) at 2026-09-07 07:59:15 +0000