[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>

1 files changed, 133 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/af9033.c b/drivers/media/dvb/frontends/af9033.c
index 5fadee79b325..da91155b8a26 100644
--- 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,