diff options
| author | Michael Krufky <mkrufky@linuxtv.org> | 2008-09-03 16:46:35 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-09-03 18:36:18 -0300 |
| commit | 2e7acd75cba3b7afa4007f20f22a86dbbdb21753 (patch) | |
| tree | c86f81cceda74c7a431f74e145f9dfaf9a9b2bd9 | |
| parent | bef69ea0dcce574a425feb0a5aa4c63dd108b9a6 (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>
| -rw-r--r-- | drivers/media/dvb/frontends/au8522.c | 66 | ||||
| -rw-r--r-- | drivers/media/dvb/frontends/au8522.h | 9 |
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) || \ |