Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8953db...
Commit: 8953db793d5bdeea5ac92c9e97f57d3ff8a7dccf
Parent: 0a6393ae21d58e85882185ce1e6b0fe28ff2dfa6
Author: Steven Toth <stoth@linuxtv.org>
AuthorDate: Mon Oct 6 21:20:21 2008 -0300
Committer: Mauro Carvalho Chehab <mchehab@redhat.com>
CommitDate: Mon Oct 13 12:27:31 2008 -0200
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>
---
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 30f82cb..b8acc7b 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");
--
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
