V4L/DVB (5217): Zl10353: Implement TRL nominal rate calculation
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>
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@ -38,6 +38,12 @@ struct zl10353_state {
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struct zl10353_config config;
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struct zl10353_config config;
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};
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};
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static int debug;
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#define dprintk(args...) \
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do { \
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if (debug) printk(KERN_DEBUG "zl10353: " args); \
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} while (0)
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static int debug_regs = 0;
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static int debug_regs = 0;
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static int zl10353_single_write(struct dvb_frontend *fe, u8 reg, u8 val)
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static int zl10353_single_write(struct dvb_frontend *fe, u8 reg, u8 val)
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@ -113,6 +119,36 @@ static void zl10353_dump_regs(struct dvb_frontend *fe)
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printk(KERN_DEBUG "%s\n", buf);
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printk(KERN_DEBUG "%s\n", buf);
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}
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}
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static void zl10353_calc_nominal_rate(struct dvb_frontend *fe,
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enum fe_bandwidth bandwidth,
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u16 *nominal_rate)
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{
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u32 adc_clock = 22528; /* 20.480 MHz on the board(!?) */
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u8 bw;
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struct zl10353_state *state = fe->demodulator_priv;
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if (state->config.adc_clock)
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adc_clock = state->config.adc_clock;
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switch (bandwidth) {
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case BANDWIDTH_6_MHZ:
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bw = 6;
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break;
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case BANDWIDTH_7_MHZ:
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bw = 7;
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break;
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case BANDWIDTH_8_MHZ:
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default:
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bw = 8;
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break;
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}
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*nominal_rate = (64 * bw * (1<<16) / (7 * 8) * 4000 / adc_clock + 2) / 4;
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dprintk("%s: bw %d, adc_clock %d => 0x%x\n",
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__FUNCTION__, bw, adc_clock, *nominal_rate);
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}
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static int zl10353_sleep(struct dvb_frontend *fe)
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static int zl10353_sleep(struct dvb_frontend *fe)
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{
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{
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static u8 zl10353_softdown[] = { 0x50, 0x0C, 0x44 };
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static u8 zl10353_softdown[] = { 0x50, 0x0C, 0x44 };
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@ -125,7 +161,7 @@ static int zl10353_set_parameters(struct dvb_frontend *fe,
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struct dvb_frontend_parameters *param)
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struct dvb_frontend_parameters *param)
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{
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{
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struct zl10353_state *state = fe->demodulator_priv;
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struct zl10353_state *state = fe->demodulator_priv;
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u16 nominal_rate;
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u8 pllbuf[6] = { 0x67 };
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u8 pllbuf[6] = { 0x67 };
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/* These settings set "auto-everything" and start the FSM. */
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/* These settings set "auto-everything" and start the FSM. */
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@ -138,8 +174,11 @@ static int zl10353_set_parameters(struct dvb_frontend *fe,
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zl10353_single_write(fe, 0x56, 0x28);
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zl10353_single_write(fe, 0x56, 0x28);
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zl10353_single_write(fe, 0x89, 0x20);
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zl10353_single_write(fe, 0x89, 0x20);
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zl10353_single_write(fe, 0x5E, 0x00);
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zl10353_single_write(fe, 0x5E, 0x00);
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zl10353_single_write(fe, 0x65, 0x5A);
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zl10353_single_write(fe, 0x66, 0xE9);
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zl10353_calc_nominal_rate(fe, param->u.ofdm.bandwidth, &nominal_rate);
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zl10353_single_write(fe, TRL_NOMINAL_RATE_1, msb(nominal_rate));
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zl10353_single_write(fe, TRL_NOMINAL_RATE_0, lsb(nominal_rate));
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zl10353_single_write(fe, 0x6C, 0xCD);
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zl10353_single_write(fe, 0x6C, 0xCD);
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zl10353_single_write(fe, 0x6D, 0x7E);
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zl10353_single_write(fe, 0x6D, 0x7E);
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if (fe->ops.i2c_gate_ctrl)
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if (fe->ops.i2c_gate_ctrl)
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@ -377,6 +416,9 @@ static struct dvb_frontend_ops zl10353_ops = {
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.read_ucblocks = zl10353_read_ucblocks,
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.read_ucblocks = zl10353_read_ucblocks,
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};
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};
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
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module_param(debug_regs, int, 0644);
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module_param(debug_regs, int, 0644);
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MODULE_PARM_DESC(debug_regs, "Turn on/off frontend register dumps (default:off).");
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MODULE_PARM_DESC(debug_regs, "Turn on/off frontend register dumps (default:off).");
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@ -29,6 +29,9 @@ struct zl10353_config
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/* demodulator's I2C address */
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/* demodulator's I2C address */
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u8 demod_address;
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u8 demod_address;
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/* frequencies in kHz */
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int adc_clock; // default: 22528
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/* set if no pll is connected to the secondary i2c bus */
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/* set if no pll is connected to the secondary i2c bus */
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int no_tuner;
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int no_tuner;
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@ -24,6 +24,9 @@
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#define ID_ZL10353 0x14
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#define ID_ZL10353 0x14
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#define msb(x) (((x) >> 8) & 0xff)
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#define lsb(x) ((x) & 0xff)
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enum zl10353_reg_addr {
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enum zl10353_reg_addr {
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INTERRUPT_0 = 0x00,
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INTERRUPT_0 = 0x00,
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INTERRUPT_1 = 0x01,
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INTERRUPT_1 = 0x01,
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@ -36,6 +39,8 @@ enum zl10353_reg_addr {
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STATUS_8 = 0x08,
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STATUS_8 = 0x08,
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STATUS_9 = 0x09,
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STATUS_9 = 0x09,
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SNR = 0x10,
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SNR = 0x10,
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TRL_NOMINAL_RATE_1 = 0x65,
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TRL_NOMINAL_RATE_0 = 0x66,
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CHIP_ID = 0x7F,
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CHIP_ID = 0x7F,
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};
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};
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