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xpp: FXS: better power-down to lower noise

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* Now every linefeed control command which is not RING'ing
  powers-down the SLIC. This reduce audible noise when
  several channels are ringing.

* Simplify code by removing redundant calls to do_chan_power()
  before linefeed_control()

* Manage vbat_h state so we skip do_chan_power() calls when
  there isn't a state change

* Export vbat_h state to /proc/.../fxs_info

Signed-off-by: Oron Peled <oron.peled@xorcom.com>
Acked-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>

Origin: http://svnview.digium.com/svn/dahdi?view=rev&rev=10478

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/branches/2.6@10490 a0bf4364-ded3-4de4-8d8a-66a801d63aff
This commit is contained in:
Oron Peled 2012-03-15 17:36:48 +00:00 committed by Tzafrir Cohen
parent b4989839bc
commit 54b9983407
1 changed files with 25 additions and 12 deletions
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37
drivers/dahdi/xpp/card_fxs.c
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@ -135,6 +135,7 @@ struct FXS_priv_data {
xpp_line_t want_dtmf_mute; /* what dahdi want */
xpp_line_t prev_key_down; /* DTMF down sets the bit */
xpp_line_t neon_blinking;
xpp_line_t vbat_h; /* High voltage */
struct timeval prev_key_time[CHANNELS_PERXPD];
int led_counter[NUM_LEDS][CHANNELS_PERXPD];
int ohttimer[CHANNELS_PERXPD];
@ -157,26 +158,35 @@ struct FXS_priv_data {
#define LED_BLINK_RING (1000/8) /* in ticks */
/*---------------- FXS: Static functions ----------------------------------*/
static int do_chan_power(xbus_t *xbus, xpd_t *xpd, lineno_t chan, bool on)
{
struct FXS_priv_data *priv;
BUG_ON(!xbus);
BUG_ON(!xpd);
priv = xpd->priv;
LINE_DBG(SIGNAL, xpd, chan, "%s\n", (on) ? "up" : "down");
if (on)
BIT_SET(priv->vbat_h, chan);
else
BIT_CLR(priv->vbat_h, chan);
return SLIC_DIRECT_REQUEST(xbus, xpd, chan, SLIC_WRITE, REG_BATTERY,
(on) ? REG_BATTERY_BATSL : 0x00);
}
static int linefeed_control(xbus_t *xbus, xpd_t *xpd, lineno_t chan, enum fxs_state value)
{
struct FXS_priv_data *priv;
bool want_vbat_h = (value == FXS_LINE_RING) ? 1 : 0;
priv = xpd->priv;
LINE_DBG(SIGNAL, xpd, chan, "value=0x%02X\n", value);
priv->lasttxhook[chan] = value;
if (IS_SET(priv->vbat_h, chan) != want_vbat_h)
do_chan_power(xbus, xpd, chan, want_vbat_h);
return SLIC_DIRECT_REQUEST(xbus, xpd, chan, SLIC_WRITE, 0x40, value);
}
static int do_chan_power(xbus_t *xbus, xpd_t *xpd, lineno_t chan, bool on)
{
int value = (on) ? REG_BATTERY_BATSL : 0x00;
BUG_ON(!xbus);
BUG_ON(!xpd);
LINE_DBG(SIGNAL, xpd, chan, "%s\n", (on) ? "up" : "down");
return SLIC_DIRECT_REQUEST(xbus, xpd, chan, SLIC_WRITE, REG_BATTERY, value);
}
static void vmwi_search(xpd_t *xpd, lineno_t pos, bool on)
{
struct FXS_priv_data *priv;
@ -654,7 +664,6 @@ static void start_stop_vm_led(xbus_t *xbus, xpd_t *xpd, lineno_t pos)
msgs = PHONEDEV(xpd).msg_waiting[pos];
LINE_DBG(SIGNAL, xpd, pos, "%s\n", (msgs) ? "ON" : "OFF");
set_vm_led_mode(xbus, xpd, pos, msgs);
do_chan_power(xbus, xpd, pos, msgs > 0);
linefeed_control(xbus, xpd, pos, (msgs > 0) ?
FXS_LINE_RING : priv->idletxhookstate[pos]);
}
@ -691,7 +700,6 @@ static int send_ring(xpd_t *xpd, lineno_t chan, bool on)
LINE_DBG(SIGNAL, xpd, chan, "%s\n", (on)?"on":"off");
priv = xpd->priv;
set_vm_led_mode(xbus, xpd, chan, 0);
do_chan_power(xbus, xpd, chan, on); // Power up (for ring)
ret = linefeed_control(xbus, xpd, chan, value);
if(on) {
MARK_BLINK(priv, chan, LED_GREEN, LED_BLINK_RING);
@ -1550,6 +1558,11 @@ static int proc_fxs_info_read(char *page, char **start, off_t off, int count, in
IS_SET(priv->search_fsk_pattern, i)
);
}
len += sprintf(page + len, "\n%-12s", "vbat_h:");
for_each_line(xpd, i) {
len += sprintf(page + len, "%4d",
IS_SET(priv->vbat_h, i));
}
len += sprintf(page + len, "\n");
for(led = 0; led < NUM_LEDS; led++) {
len += sprintf(page + len, "LED #%d", led);