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V4L/DVB (5217): Zl10353: Implement TRL nominal rate calculation

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Implement trl nominal rate calculation to Zarlink ZL10353 demod,
based on calculation used in Zarlink MT352.
This adds support for 6 and 8MHz bandwidth transponders.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Chris Pascoe <c.pascoe@itee.uq.edu.au>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Antti Palosaari 2007-02-10 10:19:11 -03:00 committed by Mauro Carvalho Chehab
parent 0a11bb865a
commit f7f57770dc
3 changed files with 65 additions and 15 deletions
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48
drivers/media/dvb/frontends/zl10353.c
View File

@ -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).");

3
drivers/media/dvb/frontends/zl10353.h
View File

@ -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;

29
drivers/media/dvb/frontends/zl10353_priv.h
View File

@ -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_ */