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authorMichael Krufky <mkrufky@linuxtv.org>2008-01-13 17:01:01 -0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2008-01-25 19:04:58 -0200
commit518d87399baee908b0353bc0ef7d41c3c46295ec (patch)
tree9d0c2cd42c6b533854616921fbbb18e108ec924c /drivers/media
parent6bfa6657246013bf999fecda0874105441f6ecb5 (diff)
V4L/DVB (7027): tda18271: put the device in standby mode during sleep()
Add function, tda18271_set_standby_mode. During sleep, enter standby mode with slave tuner output enabled, loop through on and xtal oscillator on. Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/dvb/frontends/tda18271-common.c36
-rw-r--r--drivers/media/dvb/frontends/tda18271-fe.c26
-rw-r--r--drivers/media/dvb/frontends/tda18271-priv.h3
3 files changed, 60 insertions, 5 deletions
diff --git a/drivers/media/dvb/frontends/tda18271-common.c b/drivers/media/dvb/frontends/tda18271-common.c
index d7a33565947..cebb6b90b7e 100644
--- a/drivers/media/dvb/frontends/tda18271-common.c
+++ b/drivers/media/dvb/frontends/tda18271-common.c
@@ -452,6 +452,42 @@ int tda18271_init_regs(struct dvb_frontend *fe)
/*---------------------------------------------------------------------*/
+/*
+ * Standby modes, EP3 [7:5]
+ *
+ * | SM || SM_LT || SM_XT || mode description
+ * |=====\\=======\\=======\\===================================
+ * | 0 || 0 || 0 || normal mode
+ * |-----||-------||-------||-----------------------------------
+ * | || || || standby mode w/ slave tuner output
+ * | 1 || 0 || 0 || & loop thru & xtal oscillator on
+ * |-----||-------||-------||-----------------------------------
+ * | 1 || 1 || 0 || standby mode w/ xtal oscillator on
+ * |-----||-------||-------||-----------------------------------
+ * | 1 || 1 || 1 || power off
+ *
+ */
+
+int tda18271_set_standby_mode(struct dvb_frontend *fe,
+ int sm, int sm_lt, int sm_xt)
+{
+ struct tda18271_priv *priv = fe->tuner_priv;
+ unsigned char *regs = priv->tda18271_regs;
+
+ tda_dbg("sm = %d, sm_lt = %d, sm_xt = %d\n", sm, sm_lt, sm_xt);
+
+ regs[R_EP3] &= ~0xe0; /* clear sm, sm_lt, sm_xt */
+ regs[R_EP3] |= sm ? (1 << 7) : 0 |
+ sm_lt ? (1 << 6) : 0 |
+ sm_xt ? (1 << 5) : 0;
+
+ tda18271_write_regs(fe, R_EP3, 1);
+
+ return 0;
+}
+
+/*---------------------------------------------------------------------*/
+
int tda18271_calc_main_pll(struct dvb_frontend *fe, u32 freq)
{
/* sets main post divider & divider bytes, but does not write them */
diff --git a/drivers/media/dvb/frontends/tda18271-fe.c b/drivers/media/dvb/frontends/tda18271-fe.c
index c254ac367e7..c8ab1fda1de 100644
--- a/drivers/media/dvb/frontends/tda18271-fe.c
+++ b/drivers/media/dvb/frontends/tda18271-fe.c
@@ -201,8 +201,7 @@ static int tda18271_rf_tracking_filters_correction(struct dvb_frontend *fe,
u8 dc_over_dt, rf_tab;
/* power up */
- regs[R_EP3] &= ~0xe0; /* sm = 0, sm_lt = 0, sm_xt = 0 */
- tda18271_write_regs(fe, R_EP3, 1);
+ tda18271_set_standby_mode(fe, 0, 0, 0);
/* read die current temperature */
tm_current = tda18271_read_thermometer(fe);
@@ -256,9 +255,7 @@ static int tda18271_por(struct dvb_frontend *fe)
regs[R_EB21] |= 0x03; /* set agc2_gain to -6 dB */
/* POR mode */
- regs[R_EP3] &= ~0xe0; /* clear sm, sm_lt, sm_xt */
- regs[R_EP3] |= 0x80; /* sm = 1, sm_lt = 0, sm_xt = 0 */
- tda18271_write_regs(fe, R_EP3, 1);
+ tda18271_set_standby_mode(fe, 1, 0, 0);
/* disable 1.5 MHz low pass filter */
regs[R_EB23] &= ~0x04; /* forcelp_fc2_en = 0 */
@@ -610,6 +607,9 @@ static int tda18271_init(struct dvb_frontend *fe)
mutex_lock(&priv->lock);
+ /* power up */
+ tda18271_set_standby_mode(fe, 0, 0, 0);
+
/* initialization */
tda18271_ir_cal_init(fe);
@@ -953,6 +953,21 @@ fail:
return ret;
}
+static int tda18271_sleep(struct dvb_frontend *fe)
+{
+ struct tda18271_priv *priv = fe->tuner_priv;
+
+ mutex_lock(&priv->lock);
+
+ /* standby mode w/ slave tuner output
+ * & loop thru & xtal oscillator on */
+ tda18271_set_standby_mode(fe, 1, 0, 0);
+
+ mutex_unlock(&priv->lock);
+
+ return 0;
+}
+
static int tda18271_release(struct dvb_frontend *fe)
{
struct tda18271_priv *priv = fe->tuner_priv;
@@ -1096,6 +1111,7 @@ static struct dvb_tuner_ops tda18271_tuner_ops = {
.frequency_step = 62500
},
.init = tda18271_init,
+ .sleep = tda18271_sleep,
.set_params = tda18271_set_params,
.set_analog_params = tda18271_set_analog_params,
.release = tda18271_release,
diff --git a/drivers/media/dvb/frontends/tda18271-priv.h b/drivers/media/dvb/frontends/tda18271-priv.h
index 080efb3991e..7b939a5325f 100644
--- a/drivers/media/dvb/frontends/tda18271-priv.h
+++ b/drivers/media/dvb/frontends/tda18271-priv.h
@@ -188,6 +188,9 @@ extern int tda18271_read_extended(struct dvb_frontend *fe);
extern int tda18271_write_regs(struct dvb_frontend *fe, int idx, int len);
extern int tda18271_init_regs(struct dvb_frontend *fe);
+extern int tda18271_set_standby_mode(struct dvb_frontend *fe,
+ int sm, int sm_lt, int sm_xt);
+
extern int tda18271_calc_main_pll(struct dvb_frontend *fe, u32 freq);
extern int tda18271_calc_cal_pll(struct dvb_frontend *fe, u32 freq);