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Differential D12961 Diff 34909 head/sys/dev/iicbus/ds1307.c

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head/sys/dev/iicbus/ds1307.c

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ds1307_start(void *xdev) ds1307_start(void *xdev)
{ {
device_t dev; device_t dev;
struct ds1307_softc *sc; struct ds1307_softc *sc;
struct sysctl_ctx_list *ctx; struct sysctl_ctx_list *ctx;
struct sysctl_oid *tree_node; struct sysctl_oid *tree_node;
struct sysctl_oid_list *tree; struct sysctl_oid_list *tree;
uint8_t secs; uint8_t secs;
uint8_t osc_en;
dev = (device_t)xdev; dev = (device_t)xdev;
sc = device_get_softc(dev); sc = device_get_softc(dev);
ctx = device_get_sysctl_ctx(dev); ctx = device_get_sysctl_ctx(dev);
tree_node = device_get_sysctl_tree(dev); tree_node = device_get_sysctl_tree(dev);
tree = SYSCTL_CHILDREN(tree_node); tree = SYSCTL_CHILDREN(tree_node);
config_intrhook_disestablish(&sc->enum_hook); config_intrhook_disestablish(&sc->enum_hook);
/* Check if the oscillator is disabled. */ /* Check if the oscillator is disabled. */
if (ds1307_read1(sc->sc_dev, DS1307_SECS, &secs) != 0) { if (ds1307_read1(sc->sc_dev, DS1307_SECS, &secs) != 0) {
device_printf(sc->sc_dev, "cannot read from RTC.\n"); device_printf(sc->sc_dev, "cannot read from RTC.\n");
return; return;
} }
if ((secs & DS1307_SECS_CH) != 0) { if (sc->sc_mcp7941x)
osc_en = 0x80;
else
osc_en = 0x00;
if (((secs & DS1307_SECS_CH) ^ osc_en) != 0) {
device_printf(sc->sc_dev, device_printf(sc->sc_dev,
"WARNING: RTC clock stopped, check the battery.\n"); "WARNING: RTC clock stopped, check the battery.\n");
} }
/* Configuration parameters. */ /* Configuration parameters. */
SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "sqwe", SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "sqwe",
CTLFLAG_RW | CTLTYPE_UINT | CTLFLAG_MPSAFE, sc, 0, CTLFLAG_RW | CTLTYPE_UINT | CTLFLAG_MPSAFE, sc, 0,
ds1307_sqwe_sysctl, "IU", "DS1307 square-wave enable"); ds1307_sqwe_sysctl, "IU", "DS1307 square-wave enable");
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} }
static int static int
ds1307_gettime(device_t dev, struct timespec *ts) ds1307_gettime(device_t dev, struct timespec *ts)
{ {
int error; int error;
struct clocktime ct; struct clocktime ct;
struct ds1307_softc *sc; struct ds1307_softc *sc;
uint8_t data[7], hourmask; uint8_t data[7], hourmask, st_mask;
sc = device_get_softc(dev); sc = device_get_softc(dev);
error = iicdev_readfrom(sc->sc_dev, DS1307_SECS, data, sizeof(data), error = iicdev_readfrom(sc->sc_dev, DS1307_SECS, data, sizeof(data),
IIC_INTRWAIT); IIC_INTRWAIT);
if (error != 0) { if (error != 0) {
device_printf(dev, "cannot read from RTC.\n"); device_printf(dev, "cannot read from RTC.\n");
return (error); return (error);
} }
/* If the clock halted, we don't have good data. */ /* If the clock halted, we don't have good data. */
if (data[DS1307_SECS] & DS1307_SECS_CH) if (sc->sc_mcp7941x)
st_mask = 0x80;
else
st_mask = 0x00;
if (((data[DS1307_SECS] & DS1307_SECS_CH) ^ st_mask) != 0)
return (EINVAL); return (EINVAL);
/* If chip is in AM/PM mode remember that. */ /* If chip is in AM/PM mode remember that. */
if (data[DS1307_HOUR] & DS1307_HOUR_USE_AMPM) { if (data[DS1307_HOUR] & DS1307_HOUR_USE_AMPM) {
sc->sc_use_ampm = true; sc->sc_use_ampm = true;
hourmask = DS1307_HOUR_MASK_12HR; hourmask = DS1307_HOUR_MASK_12HR;
} else } else
hourmask = DS1307_HOUR_MASK_24HR; hourmask = DS1307_HOUR_MASK_24HR;
▲ Show 20 Lines • Show All 48 Lines • ▼ Show 20 Linesds1307_settime(device_t dev, struct timespec *ts)
data[DS1307_SECS] = TOBCD(ct.sec); data[DS1307_SECS] = TOBCD(ct.sec);
data[DS1307_MINS] = TOBCD(ct.min); data[DS1307_MINS] = TOBCD(ct.min);
data[DS1307_HOUR] = TOBCD(ct.hour) | pmflags; data[DS1307_HOUR] = TOBCD(ct.hour) | pmflags;
data[DS1307_DATE] = TOBCD(ct.day); data[DS1307_DATE] = TOBCD(ct.day);
data[DS1307_WEEKDAY] = ct.dow; data[DS1307_WEEKDAY] = ct.dow;
data[DS1307_MONTH] = TOBCD(ct.mon); data[DS1307_MONTH] = TOBCD(ct.mon);
data[DS1307_YEAR] = TOBCD(ct.year % 100); data[DS1307_YEAR] = TOBCD(ct.year % 100);
if (sc->sc_mcp7941x) {
data[DS1307_SECS] |= MCP7941X_SECS_ST;
data[DS1307_WEEKDAY] |= MCP7941X_WEEKDAY_VBATEN;
if ((ct.year % 4 == 0 && ct.year % 100 != 0) ||
ct.year % 400 == 0)
data[DS1307_MONTH] |= MCP7941X_MONTH_LPYR;
}
/* Write the time back to RTC. */ /* Write the time back to RTC. */
error = iicdev_writeto(sc->sc_dev, DS1307_SECS, data, sizeof(data), error = iicdev_writeto(sc->sc_dev, DS1307_SECS, data, sizeof(data),
IIC_INTRWAIT); IIC_INTRWAIT);
if (error != 0) if (error != 0)
device_printf(dev, "cannot write to RTC.\n"); device_printf(dev, "cannot write to RTC.\n");
return (error); return (error);
} }
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