On Tue, Nov 29, 2011 at 8:01 PM, Mariusz Bialonczyk <manio@xxxxxxxxxx> wrote:
> This patch add support for reading UNC blocks for stv090x frontend.
> Partially based on stv0900 code by Abylay Ospan <aospan@xxxxxxxx>
>
> Signed-off-by: Mariusz Bialonczyk <manio@xxxxxxxxxx>
> ---
> drivers/media/dvb/frontends/stv090x.c | 32 +++++++++++++++++++++++++++++++-
> 1 files changed, 31 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/media/dvb/frontends/stv090x.c b/drivers/media/dvb/frontends/stv090x.c
> index 52d8712..ad6141f 100644
> --- a/drivers/media/dvb/frontends/stv090x.c
> +++ b/drivers/media/dvb/frontends/stv090x.c
> @@ -3687,6 +3687,35 @@ static int stv090x_read_cnr(struct dvb_frontend *fe, u16 *cnr)
> return 0;
> }
>
> +static int stv090x_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
> +{
> + struct stv090x_state *state = fe->demodulator_priv;
> + u32 reg_0, reg_1;
> + u32 val_header_err, val_packet_err;
> +
> + switch (state->delsys) {
> + case STV090x_DVBS2:
> + /* DVB-S2 delineator error count */
> +
> + /* retrieving number for erronous headers */
> + reg_1 = stv090x_read_reg(state, STV090x_P1_BBFCRCKO1);
> + reg_0 = stv090x_read_reg(state, STV090x_P1_BBFCRCKO0);
> + val_header_err = MAKEWORD16(reg_1, reg_0);
> +
> + /* retrieving number for erronous packets */
> + reg_1 = stv090x_read_reg(state, STV090x_P1_UPCRCKO1);
> + reg_0 = stv090x_read_reg(state, STV090x_P1_UPCRCKO0);
> + val_packet_err = MAKEWORD16(reg_1, reg_0);
> +
> + *ucblocks = val_packet_err + val_header_err;
With UCB, what we imply is the uncorrectable blocks in the Outer
coding. The CRC encoder/decoder is at the Physical layer, much prior
and is completely different from what is expected of UCB.
With the stv0900/3, you don't really have a Uncorrectable 's register
field, one would need to really calculate that out, rather than
reading out CRC errors.
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