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[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>
This commit is contained in:
Johannes Stezenbach 2005-05-16 21:54:29 -07:00 committed by Linus Torvalds
parent 3165dcb300
commit 3a4a571124
2 changed files with 64 additions and 1 deletions
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44
drivers/media/dvb/frontends/nxt6000.c
View File

@ -180,7 +180,12 @@ static void nxt6000_setup(struct dvb_frontend* fe)
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 @@ static void nxt6000_release(struct dvb_frontend* fe)
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 @@ static struct dvb_frontend_ops nxt6000_ops = {
.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);

21
drivers/media/dvb/frontends/nxt6000_priv.h
View File

@ -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)