[PATCH] dvb: nxt6000: support frontend status reads
add support for read_ber, read_signal_strength and read_status (Greg Wickham)
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/media/dvb/frontends/nxt6000.c b/drivers/media/dvb/frontends/nxt6000.c
index a41f7da..f79a69d 100644
--- a/drivers/media/dvb/frontends/nxt6000.c
+++ b/drivers/media/dvb/frontends/nxt6000.c
@@ -180,7 +180,12 @@
nxt6000_writereg(state, RS_COR_SYNC_PARAM, SYNC_PARAM);
nxt6000_writereg(state, BER_CTRL, /*(1 << 2) | */ (0x01 << 1) | 0x01);
- nxt6000_writereg(state, VIT_COR_CTL, VIT_COR_RESYNC);
+ nxt6000_writereg(state, VIT_BERTIME_2, 0x00); // BER Timer = 0x000200 * 256 = 131072 bits
+ nxt6000_writereg(state, VIT_BERTIME_1, 0x02); //
+ nxt6000_writereg(state, VIT_BERTIME_0, 0x00); //
+ nxt6000_writereg(state, VIT_COR_INTEN, 0x98); // Enable BER interrupts
+ nxt6000_writereg(state, VIT_COR_CTL, 0x82); // Enable BER measurement
+ nxt6000_writereg(state, VIT_COR_CTL, VIT_COR_RESYNC | 0x02 );
nxt6000_writereg(state, OFDM_COR_CTL, (0x01 << 5) | (nxt6000_readreg(state, OFDM_COR_CTL) & 0x0F));
nxt6000_writereg(state, OFDM_COR_MODEGUARD, FORCEMODE8K | 0x02);
nxt6000_writereg(state, OFDM_AGC_CTL, AGCLAST | INITIAL_AGC_BW);
@@ -486,6 +491,40 @@
kfree(state);
}
+static int nxt6000_read_snr(struct dvb_frontend* fe, u16* snr)
+{
+ struct nxt6000_state* state = (struct nxt6000_state*) fe->demodulator_priv;
+
+ *snr = nxt6000_readreg( state, OFDM_CHC_SNR) / 8;
+
+ return 0;
+}
+
+static int nxt6000_read_ber(struct dvb_frontend* fe, u32* ber)
+{
+ struct nxt6000_state* state = (struct nxt6000_state*) fe->demodulator_priv;
+
+ nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18 );
+
+ *ber = (nxt6000_readreg( state, VIT_BER_1 ) << 8 ) |
+ nxt6000_readreg( state, VIT_BER_0 );
+
+ nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18); // Clear BER Done interrupts
+
+ return 0;
+}
+
+static int nxt6000_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
+{
+ struct nxt6000_state* state = (struct nxt6000_state*) fe->demodulator_priv;
+
+ *signal_strength = (short) (511 -
+ (nxt6000_readreg(state, AGC_GAIN_1) +
+ ((nxt6000_readreg(state, AGC_GAIN_2) & 0x03) << 8)));
+
+ return 0;
+}
+
static struct dvb_frontend_ops nxt6000_ops;
struct dvb_frontend* nxt6000_attach(const struct nxt6000_config* config,
@@ -542,6 +581,9 @@
.set_frontend = nxt6000_set_frontend,
.read_status = nxt6000_read_status,
+ .read_ber = nxt6000_read_ber,
+ .read_signal_strength = nxt6000_read_signal_strength,
+ .read_snr = nxt6000_read_snr,
};
module_param(debug, int, 0644);
diff --git a/drivers/media/dvb/frontends/nxt6000_priv.h b/drivers/media/dvb/frontends/nxt6000_priv.h
index 64b1a89..0422e58 100644
--- a/drivers/media/dvb/frontends/nxt6000_priv.h
+++ b/drivers/media/dvb/frontends/nxt6000_priv.h
@@ -65,12 +65,27 @@
#define BER_DONE (0x08)
#define BER_OVERFLOW (0x10)
+/* 0x38 VIT_BERTIME_2 */
+#define VIT_BERTIME_2 (0x38)
+
+/* 0x39 VIT_BERTIME_1 */
+#define VIT_BERTIME_1 (0x39)
+
+/* 0x3A VIT_BERTIME_0 */
+#define VIT_BERTIME_0 (0x3a)
+
/* 0x38 OFDM_BERTimer *//* Use the alias registers */
#define A_VIT_BER_TIMER_0 (0x1D)
/* 0x3A VIT_BER_TIMER_0 *//* Use the alias registers */
#define A_VIT_BER_0 (0x1B)
+/* 0x3B VIT_BER_1 */
+#define VIT_BER_1 (0x3b)
+
+/* 0x3C VIT_BER_0 */
+#define VIT_BER_0 (0x3c)
+
/* 0x40 OFDM_COR_CTL */
#define OFDM_COR_CTL (0x40)
#define COREACT (0x20)
@@ -117,6 +132,12 @@
#define OFDM_ITB_CTL (0x4B)
#define ITBINV (0x01)
+/* 0x49 AGC_GAIN_1 */
+#define AGC_GAIN_1 (0x49)
+
+/* 0x4A AGC_GAIN_2 */
+#define AGC_GAIN_2 (0x4A)
+
/* 0x4C OFDM_ITB_FREQ_1 */
#define OFDM_ITB_FREQ_1 (0x4C)