summaryrefslogtreecommitdiffstats
path: root/drivers/media/dvb/frontends/stv090x.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/dvb/frontends/stv090x.c')
-rw-r--r--drivers/media/dvb/frontends/stv090x.c94
1 files changed, 64 insertions, 30 deletions
diff --git a/drivers/media/dvb/frontends/stv090x.c b/drivers/media/dvb/frontends/stv090x.c
index 96972804f4a..425e7a43ae1 100644
--- a/drivers/media/dvb/frontends/stv090x.c
+++ b/drivers/media/dvb/frontends/stv090x.c
@@ -754,11 +754,19 @@ static int stv090x_write_reg(struct stv090x_state *state, unsigned int reg, u8 d
return stv090x_write_regs(state, reg, &data, 1);
}
-static int stv090x_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
+static int stv090x_i2c_gate_ctrl(struct stv090x_state *state, int enable)
{
- struct stv090x_state *state = fe->demodulator_priv;
u32 reg;
+ /*
+ * NOTE! A lock is used as a FSM to control the state in which
+ * access is serialized between two tuners on the same demod.
+ * This has nothing to do with a lock to protect a critical section
+ * which may in some other cases be confused with protecting I/O
+ * access to the demodulator gate.
+ * In case of any error, the lock is unlocked and exit within the
+ * relevant operations themselves.
+ */
if (enable)
mutex_lock(&state->internal->tuner_lock);
@@ -1778,7 +1786,7 @@ static u32 stv090x_srate_srch_coarse(struct stv090x_state *state)
freq -= cur_step * car_step;
/* Setup tuner */
- if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 1) < 0)
goto err;
if (state->config->tuner_set_frequency) {
@@ -1791,12 +1799,12 @@ static u32 stv090x_srate_srch_coarse(struct stv090x_state *state)
goto err_gateoff;
}
- if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 0) < 0)
goto err;
msleep(50);
- if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 1) < 0)
goto err;
if (state->config->tuner_get_status) {
@@ -1809,7 +1817,7 @@ static u32 stv090x_srate_srch_coarse(struct stv090x_state *state)
else
dprintk(FE_DEBUG, 1, "Tuner unlocked");
- if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 0) < 0)
goto err;
}
@@ -1822,7 +1830,7 @@ static u32 stv090x_srate_srch_coarse(struct stv090x_state *state)
return srate_coarse;
err_gateoff:
- stv090x_i2c_gate_ctrl(fe, 0);
+ stv090x_i2c_gate_ctrl(state, 0);
err:
dprintk(FE_ERROR, 1, "I/O error");
return -1;
@@ -2167,7 +2175,7 @@ static int stv090x_get_coldlock(struct stv090x_state *state, s32 timeout_dmd)
freq -= cur_step * car_step;
/* Setup tuner */
- if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 1) < 0)
goto err;
if (state->config->tuner_set_frequency) {
@@ -2180,12 +2188,12 @@ static int stv090x_get_coldlock(struct stv090x_state *state, s32 timeout_dmd)
goto err_gateoff;
}
- if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 0) < 0)
goto err;
msleep(50);
- if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 1) < 0)
goto err;
if (state->config->tuner_get_status) {
@@ -2198,7 +2206,7 @@ static int stv090x_get_coldlock(struct stv090x_state *state, s32 timeout_dmd)
else
dprintk(FE_DEBUG, 1, "Tuner unlocked");
- if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 0) < 0)
goto err;
STV090x_WRITE_DEMOD(state, DMDISTATE, 0x1c);
@@ -2222,7 +2230,7 @@ static int stv090x_get_coldlock(struct stv090x_state *state, s32 timeout_dmd)
return lock;
err_gateoff:
- stv090x_i2c_gate_ctrl(fe, 0);
+ stv090x_i2c_gate_ctrl(state, 0);
err:
dprintk(FE_ERROR, 1, "I/O error");
return -1;
@@ -2591,7 +2599,7 @@ static enum stv090x_signal_state stv090x_get_sig_params(struct stv090x_state *st
}
state->delsys = stv090x_get_std(state);
- if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 1) < 0)
goto err;
if (state->config->tuner_get_frequency) {
@@ -2599,7 +2607,7 @@ static enum stv090x_signal_state stv090x_get_sig_params(struct stv090x_state *st
goto err_gateoff;
}
- if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 0) < 0)
goto err;
offst_freq = stv090x_get_car_freq(state, state->internal->mclk) / 1000;
@@ -2619,7 +2627,7 @@ static enum stv090x_signal_state stv090x_get_sig_params(struct stv090x_state *st
if ((state->algo == STV090x_BLIND_SEARCH) || (state->srate < 10000000)) {
- if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 1) < 0)
goto err;
if (state->config->tuner_get_frequency) {
@@ -2627,7 +2635,7 @@ static enum stv090x_signal_state stv090x_get_sig_params(struct stv090x_state *st
goto err_gateoff;
}
- if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 0) < 0)
goto err;
if (abs(offst_freq) <= ((state->search_range / 2000) + 500))
@@ -2646,7 +2654,7 @@ static enum stv090x_signal_state stv090x_get_sig_params(struct stv090x_state *st
return STV090x_OUTOFRANGE;
err_gateoff:
- stv090x_i2c_gate_ctrl(fe, 0);
+ stv090x_i2c_gate_ctrl(state, 0);
err:
dprintk(FE_ERROR, 1, "I/O error");
return -1;
@@ -3000,7 +3008,7 @@ static int stv090x_optimize_track(struct stv090x_state *state)
if (state->algo != STV090x_WARM_SEARCH) {
- if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 1) < 0)
goto err;
if (state->config->tuner_set_bandwidth) {
@@ -3008,7 +3016,7 @@ static int stv090x_optimize_track(struct stv090x_state *state)
goto err_gateoff;
}
- if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 0) < 0)
goto err;
}
@@ -3059,7 +3067,7 @@ static int stv090x_optimize_track(struct stv090x_state *state)
return 0;
err_gateoff:
- stv090x_i2c_gate_ctrl(fe, 0);
+ stv090x_i2c_gate_ctrl(state, 0);
err:
dprintk(FE_ERROR, 1, "I/O error");
return -1;
@@ -3235,7 +3243,7 @@ static enum stv090x_signal_state stv090x_algo(struct stv090x_state *state)
}
/* Setup tuner */
- if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 1) < 0)
goto err;
if (state->config->tuner_set_bbgain) {
@@ -3256,17 +3264,17 @@ static enum stv090x_signal_state stv090x_algo(struct stv090x_state *state)
goto err_gateoff;
}
- if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 0) < 0)
goto err;
msleep(50);
if (state->config->tuner_get_status) {
- if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 1) < 0)
goto err;
if (state->config->tuner_get_status(fe, &reg) < 0)
goto err_gateoff;
- if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 0) < 0)
goto err;
if (reg)
@@ -3400,7 +3408,7 @@ static enum stv090x_signal_state stv090x_algo(struct stv090x_state *state)
return signal_state;
err_gateoff:
- stv090x_i2c_gate_ctrl(fe, 0);
+ stv090x_i2c_gate_ctrl(state, 0);
err:
dprintk(FE_ERROR, 1, "I/O error");
return -1;
@@ -3839,6 +3847,17 @@ static int stv090x_sleep(struct dvb_frontend *fe)
struct stv090x_state *state = fe->demodulator_priv;
u32 reg;
+ if (stv090x_i2c_gate_ctrl(state, 1) < 0)
+ goto err;
+
+ if (state->config->tuner_sleep) {
+ if (state->config->tuner_sleep(fe) < 0)
+ goto err_gateoff;
+ }
+
+ if (stv090x_i2c_gate_ctrl(state, 0) < 0)
+ goto err;
+
dprintk(FE_DEBUG, 1, "Set %s to sleep",
state->device == STV0900 ? "STV0900" : "STV0903");
@@ -3853,6 +3872,9 @@ static int stv090x_sleep(struct dvb_frontend *fe)
goto err;
return 0;
+
+err_gateoff:
+ stv090x_i2c_gate_ctrl(state, 0);
err:
dprintk(FE_ERROR, 1, "I/O error");
return -1;
@@ -4311,6 +4333,20 @@ static int stv090x_init(struct dvb_frontend *fe)
u32 reg;
if (state->internal->mclk == 0) {
+ /* call tuner init to configure the tuner's clock output
+ divider directly before setting up the master clock of
+ the stv090x. */
+ if (stv090x_i2c_gate_ctrl(state, 1) < 0)
+ goto err;
+
+ if (config->tuner_init) {
+ if (config->tuner_init(fe) < 0)
+ goto err_gateoff;
+ }
+
+ if (stv090x_i2c_gate_ctrl(state, 0) < 0)
+ goto err;
+
stv090x_set_mclk(state, 135000000, config->xtal); /* 135 Mhz */
msleep(5);
if (stv090x_write_reg(state, STV090x_SYNTCTRL,
@@ -4336,7 +4372,7 @@ static int stv090x_init(struct dvb_frontend *fe)
if (STV090x_WRITE_DEMOD(state, DEMOD, reg) < 0)
goto err;
- if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 1) < 0)
goto err;
if (config->tuner_set_mode) {
@@ -4349,7 +4385,7 @@ static int stv090x_init(struct dvb_frontend *fe)
goto err_gateoff;
}
- if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
+ if (stv090x_i2c_gate_ctrl(state, 0) < 0)
goto err;
if (stv090x_set_tspath(state) < 0)
@@ -4358,7 +4394,7 @@ static int stv090x_init(struct dvb_frontend *fe)
return 0;
err_gateoff:
- stv090x_i2c_gate_ctrl(fe, 0);
+ stv090x_i2c_gate_ctrl(state, 0);
err:
dprintk(FE_ERROR, 1, "I/O error");
return -1;
@@ -4503,8 +4539,6 @@ static struct dvb_frontend_ops stv090x_ops = {
.sleep = stv090x_sleep,
.get_frontend_algo = stv090x_frontend_algo,
- .i2c_gate_ctrl = stv090x_i2c_gate_ctrl,
-
.diseqc_send_master_cmd = stv090x_send_diseqc_msg,
.diseqc_send_burst = stv090x_send_diseqc_burst,
.diseqc_recv_slave_reply = stv090x_recv_slave_reply,
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-23 18:32:37 +0000