diff options
| author | Steven Toth <stoth@linuxtv.org> | 2008-10-07 04:20:21 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-10-13 18:27:31 +0400 |
| commit | 8953db793d5bdeea5ac92c9e97f57d3ff8a7dccf (patch) | |
| tree | 02749412a9e8556886a8194c8e772dd85c24a8b5 /drivers/media/dvb | |
| parent | 0a6393ae21d58e85882185ce1e6b0fe28ff2dfa6 (diff) | |
| download | linux-8953db793d5bdeea5ac92c9e97f57d3ff8a7dccf.tar.xz | |
V4L/DVB (9178): cx24116: Add module parameter to return SNR as ESNO.
I've retained the older percentage code after discussing this with
Darron Broad, but made the ESNO option default.
Signed-off-by: Steven Toth <stoth@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/dvb')
| -rw-r--r-- | drivers/media/dvb/frontends/cx24116.c | 39 |
1 files changed, 36 insertions, 3 deletions
diff --git a/drivers/media/dvb/frontends/cx24116.c b/drivers/media/dvb/frontends/cx24116.c index 30f82cb0928b..b8acc7b74c33 100644 --- a/drivers/media/dvb/frontends/cx24116.c +++ b/drivers/media/dvb/frontends/cx24116.c @@ -57,8 +57,9 @@ static int debug = 0; #define CX24116_REG_RESET (0x20) /* reset status > 0 */ #define CX24116_REG_SIGNAL (0x9e) /* signal low */ #define CX24116_REG_SSTATUS (0x9d) /* signal high / status */ +#define CX24116_REG_QUALITY8 (0xa3) #define CX24116_REG_QSTATUS (0xbc) -#define CX24116_REG_QUALITY (0xd5) +#define CX24116_REG_QUALITY0 (0xd5) #define CX24116_REG_BER0 (0xc9) #define CX24116_REG_BER8 (0xc8) #define CX24116_REG_BER16 (0xc7) @@ -116,6 +117,9 @@ static int debug = 0; /* DiSEqC tone burst */ static int toneburst = 1; +/* SNR measurements */ +static int esno_snr = 1; + enum cmds { CMD_SET_VCO = 0x10, @@ -703,7 +707,7 @@ static int cx24116_read_signal_strength(struct dvb_frontend* fe, u16* signal_str } /* SNR (0..100)% = (sig & 0xf0) * 10 + (sig & 0x0f) * 10 / 16 */ -static int cx24116_read_snr(struct dvb_frontend* fe, u16* snr) +static int cx24116_read_snr_pct(struct dvb_frontend* fe, u16* snr) { struct cx24116_state *state = fe->demodulator_priv; u8 snr_reading; @@ -714,7 +718,7 @@ static int cx24116_read_snr(struct dvb_frontend* fe, u16* snr) dprintk("%s()\n", __func__); - snr_reading = cx24116_readreg(state, CX24116_REG_QUALITY); + snr_reading = cx24116_readreg(state, CX24116_REG_QUALITY0); if(snr_reading >= 0xa0 /* 100% */) *snr = 0xffff; @@ -728,6 +732,32 @@ static int cx24116_read_snr(struct dvb_frontend* fe, u16* snr) return 0; } +/* The reelbox patches show the value in the registers represents + * ESNO, from 0->30db (values 0->300). We provide this value by + * default. + */ +static int cx24116_read_snr_esno(struct dvb_frontend* fe, u16* snr) +{ + struct cx24116_state *state = fe->demodulator_priv; + + dprintk("%s()\n", __func__); + + *snr = cx24116_readreg(state, CX24116_REG_QUALITY8) << 8 | + cx24116_readreg(state, CX24116_REG_QUALITY0); + + dprintk("%s: raw 0x%04x\n", __func__, *snr); + + return 0; +} + +static int cx24116_read_snr(struct dvb_frontend* fe, u16* snr) +{ + if (esno_snr == 1) + return cx24116_read_snr_esno(fe, snr); + else + return cx24116_read_snr_pct(fe, snr); +} + static int cx24116_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) { struct cx24116_state *state = fe->demodulator_priv; @@ -1383,6 +1413,9 @@ MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)"); module_param(toneburst, int, 0644); MODULE_PARM_DESC(toneburst, "DiSEqC toneburst 0=OFF, 1=TONE CACHE, 2=MESSAGE CACHE (default:1)"); +module_param(esno_snr, int, 0644); +MODULE_PARM_DESC(debug, "SNR return units, 0=PERCENTAGE 0-100, 1=ESNO(db * 10) (default:1)"); + MODULE_DESCRIPTION("DVB Frontend module for Conexant cx24116/cx24118 hardware"); MODULE_AUTHOR("Steven Toth"); MODULE_LICENSE("GPL"); |