diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/dvb/frontends/zl10353.c | 48 | ||||
| -rw-r--r-- | drivers/media/dvb/frontends/zl10353.h | 3 | ||||
| -rw-r--r-- | drivers/media/dvb/frontends/zl10353_priv.h | 29 |
3 files changed, 65 insertions, 15 deletions
diff --git a/drivers/media/dvb/frontends/zl10353.c b/drivers/media/dvb/frontends/zl10353.c index 50dac2054353..dbb53ba6f414 100644 --- a/drivers/media/dvb/frontends/zl10353.c +++ b/drivers/media/dvb/frontends/zl10353.c @@ -38,6 +38,12 @@ struct zl10353_state { struct zl10353_config config; }; +static int debug; +#define dprintk(args...) \ + do { \ + if (debug) printk(KERN_DEBUG "zl10353: " args); \ + } while (0) + static int debug_regs = 0; static int zl10353_single_write(struct dvb_frontend *fe, u8 reg, u8 val) @@ -113,6 +119,36 @@ static void zl10353_dump_regs(struct dvb_frontend *fe) printk(KERN_DEBUG "%s\n", buf); } +static void zl10353_calc_nominal_rate(struct dvb_frontend *fe, + enum fe_bandwidth bandwidth, + u16 *nominal_rate) +{ + u32 adc_clock = 22528; /* 20.480 MHz on the board(!?) */ + u8 bw; + struct zl10353_state *state = fe->demodulator_priv; + + if (state->config.adc_clock) + adc_clock = state->config.adc_clock; + + switch (bandwidth) { + case BANDWIDTH_6_MHZ: + bw = 6; + break; + case BANDWIDTH_7_MHZ: + bw = 7; + break; + case BANDWIDTH_8_MHZ: + default: + bw = 8; + break; + } + + *nominal_rate = (64 * bw * (1<<16) / (7 * 8) * 4000 / adc_clock + 2) / 4; + + dprintk("%s: bw %d, adc_clock %d => 0x%x\n", + __FUNCTION__, bw, adc_clock, *nominal_rate); +} + static int zl10353_sleep(struct dvb_frontend *fe) { static u8 zl10353_softdown[] = { 0x50, 0x0C, 0x44 }; @@ -125,7 +161,7 @@ static int zl10353_set_parameters(struct dvb_frontend *fe, struct dvb_frontend_parameters *param) { struct zl10353_state *state = fe->demodulator_priv; - + u16 nominal_rate; u8 pllbuf[6] = { 0x67 }; /* These settings set "auto-everything" and start the FSM. */ @@ -138,8 +174,11 @@ static int zl10353_set_parameters(struct dvb_frontend *fe, zl10353_single_write(fe, 0x56, 0x28); zl10353_single_write(fe, 0x89, 0x20); zl10353_single_write(fe, 0x5E, 0x00); - zl10353_single_write(fe, 0x65, 0x5A); - zl10353_single_write(fe, 0x66, 0xE9); + + zl10353_calc_nominal_rate(fe, param->u.ofdm.bandwidth, &nominal_rate); + zl10353_single_write(fe, TRL_NOMINAL_RATE_1, msb(nominal_rate)); + zl10353_single_write(fe, TRL_NOMINAL_RATE_0, lsb(nominal_rate)); + zl10353_single_write(fe, 0x6C, 0xCD); zl10353_single_write(fe, 0x6D, 0x7E); if (fe->ops.i2c_gate_ctrl) @@ -377,6 +416,9 @@ static struct dvb_frontend_ops zl10353_ops = { .read_ucblocks = zl10353_read_ucblocks, }; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); + module_param(debug_regs, int, 0644); MODULE_PARM_DESC(debug_regs, "Turn on/off frontend register dumps (default:off)."); diff --git a/drivers/media/dvb/frontends/zl10353.h b/drivers/media/dvb/frontends/zl10353.h index 0bc0109737f1..cb274dc12b82 100644 --- a/drivers/media/dvb/frontends/zl10353.h +++ b/drivers/media/dvb/frontends/zl10353.h @@ -29,6 +29,9 @@ struct zl10353_config /* demodulator's I2C address */ u8 demod_address; + /* frequencies in kHz */ + int adc_clock; // default: 22528 + /* set if no pll is connected to the secondary i2c bus */ int no_tuner; diff --git a/drivers/media/dvb/frontends/zl10353_priv.h b/drivers/media/dvb/frontends/zl10353_priv.h index b72224bd7dde..d2186927f8f1 100644 --- a/drivers/media/dvb/frontends/zl10353_priv.h +++ b/drivers/media/dvb/frontends/zl10353_priv.h @@ -24,19 +24,24 @@ #define ID_ZL10353 0x14 +#define msb(x) (((x) >> 8) & 0xff) +#define lsb(x) ((x) & 0xff) + enum zl10353_reg_addr { - INTERRUPT_0 = 0x00, - INTERRUPT_1 = 0x01, - INTERRUPT_2 = 0x02, - INTERRUPT_3 = 0x03, - INTERRUPT_4 = 0x04, - INTERRUPT_5 = 0x05, - STATUS_6 = 0x06, - STATUS_7 = 0x07, - STATUS_8 = 0x08, - STATUS_9 = 0x09, - SNR = 0x10, - CHIP_ID = 0x7F, + INTERRUPT_0 = 0x00, + INTERRUPT_1 = 0x01, + INTERRUPT_2 = 0x02, + INTERRUPT_3 = 0x03, + INTERRUPT_4 = 0x04, + INTERRUPT_5 = 0x05, + STATUS_6 = 0x06, + STATUS_7 = 0x07, + STATUS_8 = 0x08, + STATUS_9 = 0x09, + SNR = 0x10, + TRL_NOMINAL_RATE_1 = 0x65, + TRL_NOMINAL_RATE_0 = 0x66, + CHIP_ID = 0x7F, }; #endif /* _ZL10353_PRIV_ */ |