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wctdm24xxp: Use interval for debouncing FXO battery.

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Allows the driver the option of not calling the misc function for every
frame.  This is part of preparation for moving misc processing out of
the interrupt handler.  Also use a state machine for the various battery
states to unify the technique for debouncing the various signals in the
driver.

Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Russ Meyerriecks <rmeyerriecks@digium.com>

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10169 a0bf4364-ded3-4de4-8d8a-66a801d63aff
This commit is contained in:
Shaun Ruffell 2011-08-30 16:38:36 +00:00
parent cea4b8bda3
commit 874b76bd22
2 changed files with 148 additions and 113 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

253
drivers/dahdi/wctdm24xxp/base.c
View File

@ -1940,13 +1940,141 @@ static void wctdm_fxo_ring_detect(struct wctdm *wc, struct wctdm_module *mod)
}
}
#define MS_PER_CHECK_HOOK 1
static void
wctdm_check_battery_lost(struct wctdm *wc, struct wctdm_module *const mod)
{
struct fxo *const fxo = &mod->mod.fxo;
/* possible existing states:
battery lost, no debounce timer
battery lost, debounce timer (going to battery present)
battery present or unknown, no debounce timer
battery present or unknown, debounce timer (going to battery lost)
*/
switch (fxo->battery_state) {
case BATTERY_DEBOUNCING_PRESENT:
/* we were going to BATTERY_PRESENT, but
* battery was lost again. */
fxo->battery_state = BATTERY_LOST;
break;
case BATTERY_UNKNOWN:
mod_hooksig(wc, mod, DAHDI_RXSIG_ONHOOK);
case BATTERY_DEBOUNCING_PRESENT_ALARM: /* intentional drop through */
case BATTERY_PRESENT:
fxo->battery_state = BATTERY_DEBOUNCING_LOST;
fxo->battdebounce_timer = wc->framecount + battdebounce;
break;
case BATTERY_DEBOUNCING_LOST:
if (time_after(wc->framecount, fxo->battdebounce_timer)) {
if (debug) {
dev_info(&wc->vb.pdev->dev,
"NO BATTERY on %d/%d!\n",
wc->aspan->span.spanno,
mod->card + 1);
}
#ifdef JAPAN
if (!wc->ohdebounce && wc->offhook) {
dahdi_hooksig(wc->aspan->chans[card],
DAHDI_RXSIG_ONHOOK);
if (debug) {
dev_info(&wc->vb.pdev->dev,
"Signalled On Hook\n");
}
#ifdef ZERO_BATT_RING
wc->onhook++;
#endif
}
#else
mod_hooksig(wc, mod, DAHDI_RXSIG_ONHOOK);
#endif
/* set the alarm timer, taking into account that part
* of its time period has already passed while
* debouncing occurred */
fxo->battery_state = BATTERY_DEBOUNCING_LOST_ALARM;
fxo->battdebounce_timer = wc->framecount +
battalarm - battdebounce;
}
break;
case BATTERY_DEBOUNCING_LOST_ALARM:
if (time_after(wc->framecount, fxo->battdebounce_timer)) {
fxo->battery_state = BATTERY_LOST;
dahdi_alarm_channel(get_dahdi_chan(wc, mod),
DAHDI_ALARM_RED);
}
break;
case BATTERY_LOST:
break;
}
}
static void
wctdm_check_battery_present(struct wctdm *wc, struct wctdm_module *const mod)
{
struct fxo *const fxo = &mod->mod.fxo;
switch (fxo->battery_state) {
case BATTERY_DEBOUNCING_PRESENT:
if (time_after(jiffies, fxo->battdebounce_timer)) {
if (debug) {
dev_info(&wc->vb.pdev->dev,
"BATTERY on %d/%d (%s)!\n",
wc->aspan->span.spanno, mod->card + 1,
(fxo->line_voltage_status < 0) ?
"-" : "+");
}
#ifdef ZERO_BATT_RING
if (wc->onhook) {
wc->onhook = 0;
dahdi_hooksig(wc->aspan->chans[card],
DAHDI_RXSIG_OFFHOOK);
if (debug) {
dev_info(&wc->vb.pdev->dev,
"Signalled Off Hook\n");
}
}
#else
mod_hooksig(wc, mod, DAHDI_RXSIG_OFFHOOK);
#endif
/* set the alarm timer, taking into account that part
* of its time period has already passed while
* debouncing occurred */
fxo->battery_state = BATTERY_DEBOUNCING_PRESENT_ALARM;
fxo->battdebounce_timer = jiffies +
msecs_to_jiffies(battalarm - battdebounce);
}
break;
case BATTERY_DEBOUNCING_PRESENT_ALARM:
if (time_after(jiffies, fxo->battdebounce_timer)) {
fxo->battery_state = BATTERY_PRESENT;
dahdi_alarm_channel(get_dahdi_chan(wc, mod),
DAHDI_ALARM_NONE);
}
break;
case BATTERY_PRESENT:
break;
case BATTERY_DEBOUNCING_LOST:
/* we were going to BATTERY_LOST, but battery appeared again,
* so clear the debounce timer */
fxo->battery_state = BATTERY_PRESENT;
break;
case BATTERY_UNKNOWN:
mod_hooksig(wc, mod, DAHDI_RXSIG_OFFHOOK);
case BATTERY_LOST: /* intentional drop through */
case BATTERY_DEBOUNCING_LOST_ALARM:
fxo->battery_state = BATTERY_DEBOUNCING_PRESENT;
fxo->battdebounce_timer = jiffies +
msecs_to_jiffies(battdebounce);
break;
}
}
static void
wctdm_voicedaa_check_hook(struct wctdm *wc, struct wctdm_module *const mod)
{
#define MS_PER_CHECK_HOOK 1
signed char b;
unsigned int abs_voltage;
u8 abs_voltage;
struct fxo *const fxo = &mod->mod.fxo;
/* Try to track issues that plague slot one FXO's */
@ -1962,15 +2090,14 @@ wctdm_voicedaa_check_hook(struct wctdm *wc, struct wctdm_module *const mod)
wctdm_fxo_ring_detect(wc, mod);
}
b = fxo->line_voltage_status;
abs_voltage = abs(b);
abs_voltage = abs(fxo->line_voltage_status);
if (fxovoltage && time_after(wc->framecount, fxo->display_fxovoltage)) {
/* Every 100 ms */
fxo->display_fxovoltage = wc->framecount + 100;
dev_info(&wc->vb.pdev->dev,
"Port %d: Voltage: %d Debounce %d\n",
mod->card + 1, b, fxo->battdebounce);
"Port %d: Voltage: %d\n",
mod->card + 1, fxo->line_voltage_status);
}
if (unlikely(DAHDI_RXSIG_INITIAL == get_dahdi_chan(wc, mod)->rxhooksig)) {
@ -1985,125 +2112,31 @@ wctdm_voicedaa_check_hook(struct wctdm *wc, struct wctdm_module *const mod)
* to force us to report it again via dahdi_hooksig.
*
*/
fxo->battery = BATTERY_UNKNOWN;
fxo->battery_state = BATTERY_UNKNOWN;
}
if (abs_voltage < battthresh) {
/* possible existing states:
battery lost, no debounce timer
battery lost, debounce timer (going to battery present)
battery present or unknown, no debounce timer
battery present or unknown, debounce timer (going to battery lost)
*/
fxo->lastpol = fxo->polarity;
fxo->polaritydebounce = 0;
if (fxo->battery == BATTERY_LOST) {
if (fxo->battdebounce) {
/* we were going to BATTERY_PRESENT, but battery was lost again,
so clear the debounce timer */
fxo->battdebounce = 0;
}
wctdm_check_battery_lost(wc, mod);
} else {
if (fxo->battdebounce) {
/* going to BATTERY_LOST, see if we are there yet */
if (--fxo->battdebounce == 0) {
fxo->battery = BATTERY_LOST;
if (debug)
dev_info(&wc->vb.pdev->dev, "NO BATTERY on %d/%d!\n", wc->aspan->span.spanno, mod->card + 1);
#ifdef JAPAN
if (!wc->ohdebounce && wc->offhook) {
dahdi_hooksig(wc->aspan->chans[card], DAHDI_RXSIG_ONHOOK);
if (debug)
dev_info(&wc->vb.pdev->dev, "Signalled On Hook\n");
#ifdef ZERO_BATT_RING
wc->onhook++;
#endif
}
#else
mod_hooksig(wc, mod, DAHDI_RXSIG_ONHOOK);
/* set the alarm timer, taking into account that part of its time
period has already passed while debouncing occurred */
fxo->battalarm = (battalarm - battdebounce) / MS_PER_CHECK_HOOK;
#endif
}
} else {
/* start the debounce timer to verify that battery has been lost */
fxo->battdebounce = battdebounce / MS_PER_CHECK_HOOK;
}
}
} else {
/* possible existing states:
battery lost or unknown, no debounce timer
battery lost or unknown, debounce timer (going to battery present)
battery present, no debounce timer
battery present, debounce timer (going to battery lost)
*/
if (fxo->battery == BATTERY_PRESENT) {
if (fxo->battdebounce) {
/* we were going to BATTERY_LOST, but battery appeared again,
so clear the debounce timer */
fxo->battdebounce = 0;
}
} else {
if (fxo->battdebounce) {
/* going to BATTERY_PRESENT, see if we are there yet */
if (--fxo->battdebounce == 0) {
fxo->battery = BATTERY_PRESENT;
if (debug) {
dev_info(&wc->vb.pdev->dev,
"BATTERY on %d/%d (%s)!\n",
wc->aspan->span.spanno,
mod->card + 1,
(b < 0) ? "-" : "+");
}
#ifdef ZERO_BATT_RING
if (wc->onhook) {
wc->onhook = 0;
mod_hooksig(wc, mod, DAHDI_RXSIG_OFFHOOK);
if (debug)
dev_info(&wc->vb.pdev->dev, "Signalled Off Hook\n");
}
#else
mod_hooksig(wc, mod, DAHDI_RXSIG_OFFHOOK);
#endif
/* set the alarm timer, taking into account that part of its time
period has already passed while debouncing occurred */
fxo->battalarm = (battalarm - battdebounce) / MS_PER_CHECK_HOOK;
}
} else {
/* start the debounce timer to verify that battery has appeared */
fxo->battdebounce = battdebounce / MS_PER_CHECK_HOOK;
}
}
wctdm_check_battery_present(wc, mod);
if (fxo->lastpol >= 0) {
if (b < 0) {
if (fxo->line_voltage_status < 0) {
fxo->lastpol = -1;
fxo->polaritydebounce = POLARITY_DEBOUNCE / MS_PER_CHECK_HOOK;
}
}
if (fxo->lastpol <= 0) {
if (b > 0) {
if (fxo->line_voltage_status > 0) {
fxo->lastpol = 1;
fxo->polaritydebounce = POLARITY_DEBOUNCE / MS_PER_CHECK_HOOK;
}
}
}
if (fxo->battalarm) {
if (--fxo->battalarm == 0) {
/* the alarm timer has expired, so update the battery alarm state
for this channel */
dahdi_alarm_channel(get_dahdi_chan(wc, mod),
(fxo->battery == BATTERY_LOST) ?
DAHDI_ALARM_RED :
DAHDI_ALARM_NONE);
}
}
if (fxo->polaritydebounce) {
fxo->polaritydebounce--;
if (fxo->polaritydebounce < 1) {
@ -2124,12 +2157,12 @@ wctdm_voicedaa_check_hook(struct wctdm *wc, struct wctdm_module *const mod)
* where the voltage is over the neon limit but
* does not vary greatly from the last reading
*/
if (fxo->battery == 1 &&
if (fxo->battery_state == BATTERY_PRESENT &&
abs_voltage > neonmwi_level &&
(0 == fxo->neonmwi_last_voltage ||
(b >= fxo->neonmwi_last_voltage - neonmwi_envelope &&
b <= fxo->neonmwi_last_voltage + neonmwi_envelope ))) {
fxo->neonmwi_last_voltage = b;
(fxo->line_voltage_status >= fxo->neonmwi_last_voltage - neonmwi_envelope &&
fxo->line_voltage_status <= fxo->neonmwi_last_voltage + neonmwi_envelope))) {
fxo->neonmwi_last_voltage = fxo->line_voltage_status;
if (NEONMWI_ON_DEBOUNCE == fxo->neonmwi_debounce) {
fxo->neonmwi_offcounter = neonmwi_offlimit_cycles;
if (0 == fxo->neonmwi_state) {

8
drivers/dahdi/wctdm24xxp/wctdm24xxp.h
View File

@ -105,7 +105,11 @@ struct calregs {
enum battery_state {
BATTERY_UNKNOWN = 0,
BATTERY_DEBOUNCING_PRESENT,
BATTERY_DEBOUNCING_PRESENT_ALARM,
BATTERY_PRESENT,
BATTERY_DEBOUNCING_LOST,
BATTERY_DEBOUNCING_LOST_ALARM,
BATTERY_LOST,
};
@ -159,9 +163,6 @@ struct fxo {
u8 hook_ring_shadow;
s8 line_voltage_status;
int offhook;
int battdebounce;
int battalarm;
enum battery_state battery;
int lastpol;
int polarity;
int polaritydebounce;
@ -171,6 +172,7 @@ struct fxo {
unsigned int neonmwi_offcounter;
unsigned long display_fxovoltage;
unsigned long ringdebounce_timer;
unsigned long battdebounce_timer;
};
struct fxs {