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path: root/drivers/media/dvb/frontends/rtl2830.c
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Diffstat (limited to 'drivers/media/dvb/frontends/rtl2830.c')
-rw-r--r--drivers/media/dvb/frontends/rtl2830.c201
1 files changed, 198 insertions, 3 deletions
diff --git a/drivers/media/dvb/frontends/rtl2830.c b/drivers/media/dvb/frontends/rtl2830.c
index 45196c5b073..93612ebac51 100644
--- a/drivers/media/dvb/frontends/rtl2830.c
+++ b/drivers/media/dvb/frontends/rtl2830.c
@@ -374,6 +374,118 @@ err:
return ret;
}
+static int rtl2830_get_frontend(struct dvb_frontend *fe)
+{
+ struct rtl2830_priv *priv = fe->demodulator_priv;
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ int ret;
+ u8 buf[3];
+
+ if (priv->sleeping)
+ return 0;
+
+ ret = rtl2830_rd_regs(priv, 0x33c, buf, 2);
+ if (ret)
+ goto err;
+
+ ret = rtl2830_rd_reg(priv, 0x351, &buf[2]);
+ if (ret)
+ goto err;
+
+ dbg("%s: TPS=%02x %02x %02x", __func__, buf[0], buf[1], buf[2]);
+
+ switch ((buf[0] >> 2) & 3) {
+ case 0:
+ c->modulation = QPSK;
+ break;
+ case 1:
+ c->modulation = QAM_16;
+ break;
+ case 2:
+ c->modulation = QAM_64;
+ break;
+ }
+
+ switch ((buf[2] >> 2) & 1) {
+ case 0:
+ c->transmission_mode = TRANSMISSION_MODE_2K;
+ break;
+ case 1:
+ c->transmission_mode = TRANSMISSION_MODE_8K;
+ }
+
+ switch ((buf[2] >> 0) & 3) {
+ case 0:
+ c->guard_interval = GUARD_INTERVAL_1_32;
+ break;
+ case 1:
+ c->guard_interval = GUARD_INTERVAL_1_16;
+ break;
+ case 2:
+ c->guard_interval = GUARD_INTERVAL_1_8;
+ break;
+ case 3:
+ c->guard_interval = GUARD_INTERVAL_1_4;
+ break;
+ }
+
+ switch ((buf[0] >> 4) & 7) {
+ case 0:
+ c->hierarchy = HIERARCHY_NONE;
+ break;
+ case 1:
+ c->hierarchy = HIERARCHY_1;
+ break;
+ case 2:
+ c->hierarchy = HIERARCHY_2;
+ break;
+ case 3:
+ c->hierarchy = HIERARCHY_4;
+ break;
+ }
+
+ switch ((buf[1] >> 3) & 7) {
+ case 0:
+ c->code_rate_HP = FEC_1_2;
+ break;
+ case 1:
+ c->code_rate_HP = FEC_2_3;
+ break;
+ case 2:
+ c->code_rate_HP = FEC_3_4;
+ break;
+ case 3:
+ c->code_rate_HP = FEC_5_6;
+ break;
+ case 4:
+ c->code_rate_HP = FEC_7_8;
+ break;
+ }
+
+ switch ((buf[1] >> 0) & 7) {
+ case 0:
+ c->code_rate_LP = FEC_1_2;
+ break;
+ case 1:
+ c->code_rate_LP = FEC_2_3;
+ break;
+ case 2:
+ c->code_rate_LP = FEC_3_4;
+ break;
+ case 3:
+ c->code_rate_LP = FEC_5_6;
+ break;
+ case 4:
+ c->code_rate_LP = FEC_7_8;
+ break;
+ }
+
+ return 0;
+err:
+ dbg("%s: failed=%d", __func__, ret);
+ return ret;
+}
+
static int rtl2830_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct rtl2830_priv *priv = fe->demodulator_priv;
@@ -404,14 +516,72 @@ err:
static int rtl2830_read_snr(struct dvb_frontend *fe, u16 *snr)
{
- *snr = 0;
+ struct rtl2830_priv *priv = fe->demodulator_priv;
+ int ret, hierarchy, constellation;
+ u8 buf[2], tmp;
+ u16 tmp16;
+#define CONSTELLATION_NUM 3
+#define HIERARCHY_NUM 4
+ static const u32 snr_constant[CONSTELLATION_NUM][HIERARCHY_NUM] = {
+ { 70705899, 70705899, 70705899, 70705899 },
+ { 82433173, 82433173, 87483115, 94445660 },
+ { 92888734, 92888734, 95487525, 99770748 },
+ };
+
+ if (priv->sleeping)
+ return 0;
+
+ /* reports SNR in resolution of 0.1 dB */
+
+ ret = rtl2830_rd_reg(priv, 0x33c, &tmp);
+ if (ret)
+ goto err;
+
+ constellation = (tmp >> 2) & 0x03; /* [3:2] */
+ if (constellation > CONSTELLATION_NUM - 1)
+ goto err;
+
+ hierarchy = (tmp >> 4) & 0x07; /* [6:4] */
+ if (hierarchy > HIERARCHY_NUM - 1)
+ goto err;
+
+ ret = rtl2830_rd_regs(priv, 0x40c, buf, 2);
+ if (ret)
+ goto err;
+
+ tmp16 = buf[0] << 8 | buf[1];
+
+ if (tmp16)
+ *snr = (snr_constant[constellation][hierarchy] -
+ intlog10(tmp16)) / ((1 << 24) / 100);
+ else
+ *snr = 0;
+
return 0;
+err:
+ dbg("%s: failed=%d", __func__, ret);
+ return ret;
}
static int rtl2830_read_ber(struct dvb_frontend *fe, u32 *ber)
{
- *ber = 0;
+ struct rtl2830_priv *priv = fe->demodulator_priv;
+ int ret;
+ u8 buf[2];
+
+ if (priv->sleeping)
+ return 0;
+
+ ret = rtl2830_rd_regs(priv, 0x34e, buf, 2);
+ if (ret)
+ goto err;
+
+ *ber = buf[0] << 8 | buf[1];
+
return 0;
+err:
+ dbg("%s: failed=%d", __func__, ret);
+ return ret;
}
static int rtl2830_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
@@ -422,8 +592,32 @@ static int rtl2830_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
static int rtl2830_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
{
- *strength = 0;
+ struct rtl2830_priv *priv = fe->demodulator_priv;
+ int ret;
+ u8 buf[2];
+ u16 if_agc_raw, if_agc;
+
+ if (priv->sleeping)
+ return 0;
+
+ ret = rtl2830_rd_regs(priv, 0x359, buf, 2);
+ if (ret)
+ goto err;
+
+ if_agc_raw = (buf[0] << 8 | buf[1]) & 0x3fff;
+
+ if (if_agc_raw & (1 << 9))
+ if_agc = -(~(if_agc_raw - 1) & 0x1ff);
+ else
+ if_agc = if_agc_raw;
+
+ *strength = (u8) (55 - if_agc / 182);
+ *strength |= *strength << 8;
+
return 0;
+err:
+ dbg("%s: failed=%d", __func__, ret);
+ return ret;
}
static struct dvb_frontend_ops rtl2830_ops;
@@ -549,6 +743,7 @@ static struct dvb_frontend_ops rtl2830_ops = {
.get_tune_settings = rtl2830_get_tune_settings,
.set_frontend = rtl2830_set_frontend,
+ .get_frontend = rtl2830_get_frontend,
.read_status = rtl2830_read_status,
.read_snr = rtl2830_read_snr,