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>

diff --git a/drivers/media/dvb/frontends/tda18271-common.c b/drivers/media/dvb/frontends/tda18271-common.c
index d7a3356594743297a42028e698468ea39dee8a0c..cebb6b90b7e0dc267c198abc1274300db1e2ab56 100644 (file)
--- 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 c254ac367e7205d32a234c0b299815b03ef1d139..c8ab1fda1dea3e244c202dc0a76d42766fe66b42 100644 (file)
--- 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 080efb3991ed9f44d6b339594f4a9496178f935c..7b939a5325fb970189feeb998913f37e49d11e19 100644 (file)
--- 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);