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authorChris Pascoe <c.pascoe@itee.uq.edu.au>2007-02-10 16:17:57 +0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2007-02-21 18:35:21 +0300
commit67b60aad168cfdd40ffec12f14b93e2e68f7d486 (patch)
tree83f6ce2c66742eb0c8d4190e8e62ddac57e7c26a /drivers/media/dvb/frontends/zl10353.c
parent90060d32ca0a941b158994f78e60d0381871c84b (diff)
downloadlinux-67b60aad168cfdd40ffec12f14b93e2e68f7d486.tar.xz
V4L/DVB (5215): Experimental support for signal strength/BER/uncorrectable count
After studying many hours worth of register dumps of MT352 and ZL10353 fed with identically damaged RF signals I have made an educated guess at which registers contain the AGC level, bit error rate and uncorrectable error count values. Implement the IOCTLs that return these values to userspace. Signed-off-by: Chris Pascoe <c.pascoe@itee.uq.edu.au> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/dvb/frontends/zl10353.c')
-rw-r--r--drivers/media/dvb/frontends/zl10353.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/zl10353.c b/drivers/media/dvb/frontends/zl10353.c
index a1b0afbd47ba..0d8241de89ee 100644
--- a/drivers/media/dvb/frontends/zl10353.c
+++ b/drivers/media/dvb/frontends/zl10353.c
@@ -213,6 +213,29 @@ static int zl10353_read_status(struct dvb_frontend *fe, fe_status_t *status)
return 0;
}
+static int zl10353_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+
+ *ber = zl10353_read_register(state, 0x11) << 16 |
+ zl10353_read_register(state, 0x12) << 8 |
+ zl10353_read_register(state, 0x13);
+
+ return 0;
+}
+
+static int zl10353_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+
+ u16 signal = zl10353_read_register(state, 0x0a) << 10 |
+ zl10353_read_register(state, 0x0b) << 2 | 3;
+
+ *strength = ~signal;
+
+ return 0;
+}
+
static int zl10353_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct zl10353_state *state = fe->demodulator_priv;
@@ -227,6 +250,16 @@ static int zl10353_read_snr(struct dvb_frontend *fe, u16 *snr)
return 0;
}
+static int zl10353_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+
+ *ucblocks = zl10353_read_register(state, 0x14) << 8 |
+ zl10353_read_register(state, 0x15);
+
+ return 0;
+}
+
static int zl10353_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings
*fe_tune_settings)
@@ -325,7 +358,10 @@ static struct dvb_frontend_ops zl10353_ops = {
.get_tune_settings = zl10353_get_tune_settings,
.read_status = zl10353_read_status,
+ .read_ber = zl10353_read_ber,
+ .read_signal_strength = zl10353_read_signal_strength,
.read_snr = zl10353_read_snr,
+ .read_ucblocks = zl10353_read_ucblocks,
};
module_param(debug_regs, int, 0644);