[media] af9033: implement get_frontend

Implement the get_frontend function.
The code is derived from the old af9033 driver by Antti Palosaari.

Signed-off-by: Gianluca Gennari <gennarone@gmail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/dvb/frontends/af9033.c b/drivers/media/dvb/frontends/af9033.c
index 5fadee79b325680b7d78692c1ee34d833beed3d6..da91155b8a2610ae41f0af8fb978b715dc9d6ba0 100644 (file)
--- a/drivers/media/dvb/frontends/af9033.c
+++ b/drivers/media/dvb/frontends/af9033.c
@@ -26,6 +26,7 @@ struct af9033_state {
        struct dvb_frontend fe;
        struct af9033_config cfg;
 
+       u32 frequency;
        u32 bandwidth_hz;
        bool ts_mode_parallel;
        bool ts_mode_serial;
@@ -406,6 +407,8 @@ static int af9033_set_frontend(struct dvb_frontend *fe)
        pr_debug("%s: frequency=%d bandwidth_hz=%d\n", __func__, c->frequency,
                        c->bandwidth_hz);
 
+       state->frequency = c->frequency;
+
        /* check bandwidth */
        switch (c->bandwidth_hz) {
        case 6000000:
@@ -523,6 +526,135 @@ err:
        return ret;
 }
 
+static int af9033_get_frontend(struct dvb_frontend *fe)
+{
+       struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+       struct af9033_state *state = fe->demodulator_priv;
+       int ret;
+       u8 buf[8];
+
+       pr_debug("%s\n", __func__);
+
+       /* read all needed registers */
+       ret = af9033_rd_regs(state, 0x80f900, buf, sizeof(buf));
+       if (ret)
+               goto error;
+
+       switch ((buf[0] >> 0) & 3) {
+       case 0:
+               p->transmission_mode = TRANSMISSION_MODE_2K;
+               break;
+       case 1:
+               p->transmission_mode = TRANSMISSION_MODE_8K;
+               break;
+       }
+
+       switch ((buf[1] >> 0) & 3) {
+       case 0:
+               p->guard_interval = GUARD_INTERVAL_1_32;
+               break;
+       case 1:
+               p->guard_interval = GUARD_INTERVAL_1_16;
+               break;
+       case 2:
+               p->guard_interval = GUARD_INTERVAL_1_8;
+               break;
+       case 3:
+               p->guard_interval = GUARD_INTERVAL_1_4;
+               break;
+       }
+
+       switch ((buf[2] >> 0) & 7) {
+       case 0:
+               p->hierarchy = HIERARCHY_NONE;
+               break;
+       case 1:
+               p->hierarchy = HIERARCHY_1;
+               break;
+       case 2:
+               p->hierarchy = HIERARCHY_2;
+               break;
+       case 3:
+               p->hierarchy = HIERARCHY_4;
+               break;
+       }
+
+       switch ((buf[3] >> 0) & 3) {
+       case 0:
+               p->modulation = QPSK;
+               break;
+       case 1:
+               p->modulation = QAM_16;
+               break;
+       case 2:
+               p->modulation = QAM_64;
+               break;
+       }
+
+       switch ((buf[4] >> 0) & 3) {
+       case 0:
+               p->bandwidth_hz = 6000000;
+               break;
+       case 1:
+               p->bandwidth_hz = 7000000;
+               break;
+       case 2:
+               p->bandwidth_hz = 8000000;
+               break;
+       }
+
+       switch ((buf[6] >> 0) & 7) {
+       case 0:
+               p->code_rate_HP = FEC_1_2;
+               break;
+       case 1:
+               p->code_rate_HP = FEC_2_3;
+               break;
+       case 2:
+               p->code_rate_HP = FEC_3_4;
+               break;
+       case 3:
+               p->code_rate_HP = FEC_5_6;
+               break;
+       case 4:
+               p->code_rate_HP = FEC_7_8;
+               break;
+       case 5:
+               p->code_rate_HP = FEC_NONE;
+               break;
+       }
+
+       switch ((buf[7] >> 0) & 7) {
+       case 0:
+               p->code_rate_LP = FEC_1_2;
+               break;
+       case 1:
+               p->code_rate_LP = FEC_2_3;
+               break;
+       case 2:
+               p->code_rate_LP = FEC_3_4;
+               break;
+       case 3:
+               p->code_rate_LP = FEC_5_6;
+               break;
+       case 4:
+               p->code_rate_LP = FEC_7_8;
+               break;
+       case 5:
+               p->code_rate_LP = FEC_NONE;
+               break;
+       }
+
+       p->inversion = INVERSION_AUTO;
+       p->frequency = state->frequency;
+
+error:
+       if (ret)
+               pr_debug("%s: failed:%d\n", __func__, ret);
+
+       return ret;
+}
+
 static int af9033_read_status(struct dvb_frontend *fe, fe_status_t *status)
 {
        struct af9033_state *state = fe->demodulator_priv;
@@ -776,6 +908,7 @@ static struct dvb_frontend_ops af9033_ops = {
 
        .get_tune_settings = af9033_get_tune_settings,
        .set_frontend = af9033_set_frontend,
+       .get_frontend = af9033_get_frontend,
 
        .read_status = af9033_read_status,
        .read_snr = af9033_read_snr,