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>
diff --git a/drivers/media/dvb/frontends/zl10353.c b/drivers/media/dvb/frontends/zl10353.c
index 50dac20..dbb53ba 100644
--- a/drivers/media/dvb/frontends/zl10353.c
+++ b/drivers/media/dvb/frontends/zl10353.c
@@ -38,6 +38,12 @@
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 @@
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 @@
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 @@
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 @@
.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 0bc0109..cb274dc 100644
--- a/drivers/media/dvb/frontends/zl10353.h
+++ b/drivers/media/dvb/frontends/zl10353.h
@@ -29,6 +29,9 @@
/* 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 b72224b..d218692 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_ */