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Add an AC line monitor so power_profile can work

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Summary:
Add a polling loop (1Hz) to monitor the battery and AC status, to notify devd
like ACPI does for power monitoring.  This allows /etc/rc.d/power_profile to
work on PowerPC laptops

Test Plan:
Tested on a Titanium PowerBook, configuring economy_cpu_freq and
performance_cpu_freq, disabling powerd.

Reviewers: #powerpc, nwhitehorn

Reviewed By: nwhitehorn

Subscribers: rpaulo

Differential Revision: https://reviews.freebsd.org/D937
This commit is contained in:
Justin Hibbits 2014-10-12 19:12:48 +00:00
parent 6461dd5c77
commit d49c6f029c
2 changed files with 53 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
etc/devd/apple.conf
View File

@ -71,4 +71,10 @@ notify 0 {
action "camcontrol eject cd0";
};
# Equivalent to the ACPI/ACAD notify
notify 10 {
match "system" "PMU";
match "subsystem" "POWER";
match "type" "ACLINE";
action "/etc/rc.d/power_profile $notify";
}

46
sys/powerpc/powermac/pmu.c
View File

@ -35,6 +35,7 @@ __FBSDID("$FreeBSD$");
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/clock.h>
#include <sys/proc.h>
#include <sys/reboot.h>
@ -183,6 +184,9 @@ static int pmu_send(void *cookie, int cmd, int length, uint8_t *in_msg,
static uint8_t pmu_read_reg(struct pmu_softc *sc, u_int offset);
static void pmu_write_reg(struct pmu_softc *sc, u_int offset, uint8_t value);
static int pmu_intr_state(struct pmu_softc *);
static void pmu_battquery_proc(void);
static void pmu_battery_notify(struct pmu_battstate *batt,
struct pmu_battstate *old);
/* these values shows that number of data returned after 'send' cmd is sent */
static signed char pm_send_cmd_type[] = {
@ -256,6 +260,13 @@ static signed char pm_receive_cmd_type[] = {
-1, -1, -1, -1, -1, -1, -1, -1,
};
static struct proc *pmubattproc;
static struct kproc_desc pmu_batt_kp = {
"pmu_batt",
pmu_battquery_proc,
&pmubattproc
};
/* We only have one of each device, so globals are safe */
static device_t pmu = NULL;
static device_t pmu_extint = NULL;
@ -420,6 +431,8 @@ pmu_attach(device_t dev)
struct sysctl_oid *oid, *battroot;
char battnum[2];
/* Only start the battery monitor if we have a battery. */
kproc_start(&pmu_batt_kp);
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"acline", CTLTYPE_INT | CTLFLAG_RD, sc, 0,
pmu_acline_state, "I", "AC Line Status");
@ -914,6 +927,39 @@ pmu_query_battery(struct pmu_softc *sc, int batt, struct pmu_battstate *info)
return (0);
}
static void
pmu_battery_notify(struct pmu_battstate *batt, struct pmu_battstate *old)
{
char notify_buf[16];
int acline;
acline = (batt->state & PMU_PWR_AC_PRESENT) ? 1 : 0;
if (acline != (old->state & PMU_PWR_AC_PRESENT)) {
snprintf(notify_buf, sizeof(notify_buf),
"notify=0x%02x", acline);
devctl_notify("PMU", "POWER", "ACLINE", notify_buf);
}
}
static void
pmu_battquery_proc()
{
struct pmu_softc *sc;
struct pmu_battstate batt;
struct pmu_battstate cur_batt;
int error;
sc = device_get_softc(pmu);
error = pmu_query_battery(sc, 0, &cur_batt);
while (1) {
error = pmu_query_battery(sc, 0, &batt);
pmu_battery_notify(&batt, &cur_batt);
cur_batt = batt;
pause("pmu_batt", hz);
}
}
static int
pmu_acline_state(SYSCTL_HANDLER_ARGS)
{