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authorMichael Krufky <mkrufky@linuxtv.org>2008-09-03 16:46:35 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2008-09-03 18:36:18 -0300
commit2e7acd75cba3b7afa4007f20f22a86dbbdb21753 (patch)
treec86f81cceda74c7a431f74e145f9dfaf9a9b2bd9 /drivers/media/dvb/frontends
parentbef69ea0dcce574a425feb0a5aa4c63dd108b9a6 (diff)
V4L/DVB (8555): au8522: add mechanism to configure IF frequency for vsb and qam
Add a mechanism to configure IF frequency for vsb and qam. Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/dvb/frontends')
-rw-r--r--drivers/media/dvb/frontends/au8522.c66
-rw-r--r--drivers/media/dvb/frontends/au8522.h9
2 files changed, 75 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/au8522.c b/drivers/media/dvb/frontends/au8522.c
index f7b71657f0f..5741bc93079 100644
--- a/drivers/media/dvb/frontends/au8522.c
+++ b/drivers/media/dvb/frontends/au8522.c
@@ -304,6 +304,70 @@ static int au8522_mse2snr_lookup(struct mse2snr_tab *tab, int sz, int mse,
return ret;
}
+/* 3.25 MHz IF Frequency table */
+static struct {
+ u16 reg;
+ u16 data;
+} if_3_25_mhz_tab[] = {
+ { 0x80b5, 0x00 },
+ { 0x80b6, 0x3d },
+ { 0x80b7, 0xa0 },
+};
+
+/* 4.00 MHz IF Frequency table */
+static struct {
+ u16 reg;
+ u16 data;
+} if_4_mhz_tab[] = {
+ { 0x80b5, 0x00 },
+ { 0x80b6, 0x4b },
+ { 0x80b7, 0xd9 },
+};
+
+/* 6.00 MHz IF Frequency table */
+static struct {
+ u16 reg;
+ u16 data;
+} if_6_mhz_tab[] = {
+ { 0x80b5, 0xfb },
+ { 0x80b6, 0x8e },
+ { 0x80b7, 0x39 },
+};
+
+static int au8522_set_if(struct dvb_frontend *fe, enum au8522_if_freq if_freq)
+{
+ struct au8522_state *state = fe->demodulator_priv;
+ int i;
+
+ switch (if_freq) {
+ case AU8522_IF_3_25MHZ:
+ dprintk("%s() 3.25 MHz\n", __func__);
+ for (i = 0; i < ARRAY_SIZE(if_3_25_mhz_tab); i++)
+ au8522_writereg(state,
+ if_3_25_mhz_tab[i].reg,
+ if_3_25_mhz_tab[i].data);
+ break;
+ case AU8522_IF_4MHZ:
+ dprintk("%s() 4.00 MHz\n", __func__);
+ for (i = 0; i < ARRAY_SIZE(if_4_mhz_tab); i++)
+ au8522_writereg(state,
+ if_4_mhz_tab[i].reg,
+ if_4_mhz_tab[i].data);
+ break;
+ case AU8522_IF_6MHZ:
+ dprintk("%s() 6.00 MHz\n", __func__);
+ for (i = 0; i < ARRAY_SIZE(if_6_mhz_tab); i++)
+ au8522_writereg(state,
+ if_6_mhz_tab[i].reg,
+ if_6_mhz_tab[i].data);
+ break;
+ default:
+ dprintk("%s() IF Frequency not supported\n", __func__);
+ return -EINVAL;
+ }
+ return 0;
+}
+
/* VSB Modulation table */
static struct {
u16 reg;
@@ -438,6 +502,7 @@ static int au8522_enable_modulation(struct dvb_frontend *fe,
au8522_writereg(state,
VSB_mod_tab[i].reg,
VSB_mod_tab[i].data);
+ au8522_set_if(fe, state->config->vsb_if);
break;
case QAM_64:
case QAM_256:
@@ -446,6 +511,7 @@ static int au8522_enable_modulation(struct dvb_frontend *fe,
au8522_writereg(state,
QAM_mod_tab[i].reg,
QAM_mod_tab[i].data);
+ au8522_set_if(fe, state->config->qam_if);
break;
default:
dprintk("%s() Invalid modulation\n", __func__);
diff --git a/drivers/media/dvb/frontends/au8522.h b/drivers/media/dvb/frontends/au8522.h
index d7affa3cdb2..afc9af26e7a 100644
--- a/drivers/media/dvb/frontends/au8522.h
+++ b/drivers/media/dvb/frontends/au8522.h
@@ -24,6 +24,12 @@
#include <linux/dvb/frontend.h>
+enum au8522_if_freq {
+ AU8522_IF_6MHZ = 0,
+ AU8522_IF_4MHZ,
+ AU8522_IF_3_25MHZ,
+};
+
struct au8522_config {
/* the demodulator's i2c address */
u8 demod_address;
@@ -32,6 +38,9 @@ struct au8522_config {
#define AU8522_TUNERLOCKING 0
#define AU8522_DEMODLOCKING 1
u8 status_mode;
+
+ enum au8522_if_freq vsb_if;
+ enum au8522_if_freq qam_if;
};
#if defined(CONFIG_DVB_AU8522) || \