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Diffstat (limited to 'drivers/media/dvb/frontends/zl10353.c')
-rw-r--r--drivers/media/dvb/frontends/zl10353.c327
1 files changed, 288 insertions, 39 deletions
diff --git a/drivers/media/dvb/frontends/zl10353.c b/drivers/media/dvb/frontends/zl10353.c
index 0106df4c55e8..276e3b631dc2 100644
--- a/drivers/media/dvb/frontends/zl10353.c
+++ b/drivers/media/dvb/frontends/zl10353.c
@@ -1,7 +1,7 @@
/*
* Driver for Zarlink DVB-T ZL10353 demodulator
*
- * Copyright (C) 2006 Christopher Pascoe <c.pascoe@itee.uq.edu.au>
+ * Copyright (C) 2006, 2007 Christopher Pascoe <c.pascoe@itee.uq.edu.au>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -16,7 +16,7 @@
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.=
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/kernel.h>
@@ -25,6 +25,7 @@
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/slab.h>
+#include <asm/div64.h>
#include "dvb_frontend.h"
#include "zl10353_priv.h"
@@ -35,6 +36,8 @@ struct zl10353_state {
struct dvb_frontend frontend;
struct zl10353_config config;
+
+ enum fe_bandwidth bandwidth;
};
static int debug;
@@ -122,9 +125,10 @@ static void zl10353_calc_nominal_rate(struct dvb_frontend *fe,
enum fe_bandwidth bandwidth,
u16 *nominal_rate)
{
- u32 adc_clock = 45056; /* 45.056 MHz */
- u8 bw;
struct zl10353_state *state = fe->demodulator_priv;
+ u32 adc_clock = 450560; /* 45.056 MHz */
+ u64 value;
+ u8 bw;
if (state->config.adc_clock)
adc_clock = state->config.adc_clock;
@@ -142,12 +146,44 @@ static void zl10353_calc_nominal_rate(struct dvb_frontend *fe,
break;
}
- *nominal_rate = (bw * (1 << 23) / 7 * 125 + adc_clock / 2) / adc_clock;
+ value = (u64)10 * (1 << 23) / 7 * 125;
+ value = (bw * value) + adc_clock / 2;
+ do_div(value, adc_clock);
+ *nominal_rate = value;
dprintk("%s: bw %d, adc_clock %d => 0x%x\n",
__FUNCTION__, bw, adc_clock, *nominal_rate);
}
+static void zl10353_calc_input_freq(struct dvb_frontend *fe,
+ u16 *input_freq)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+ u32 adc_clock = 450560; /* 45.056 MHz */
+ int if2 = 361667; /* 36.1667 MHz */
+ int ife;
+ u64 value;
+
+ if (state->config.adc_clock)
+ adc_clock = state->config.adc_clock;
+ if (state->config.if2)
+ if2 = state->config.if2;
+
+ if (adc_clock >= if2 * 2)
+ ife = if2;
+ else {
+ ife = adc_clock - (if2 % adc_clock);
+ if (ife > adc_clock / 2)
+ ife = adc_clock - ife;
+ }
+ value = (u64)65536 * ife + adc_clock / 2;
+ do_div(value, adc_clock);
+ *input_freq = -value;
+
+ dprintk("%s: if2 %d, ife %d, adc_clock %d => %d / 0x%x\n",
+ __FUNCTION__, if2, ife, adc_clock, -(int)value, *input_freq);
+}
+
static int zl10353_sleep(struct dvb_frontend *fe)
{
static u8 zl10353_softdown[] = { 0x50, 0x0C, 0x44 };
@@ -160,64 +196,276 @@ 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 };
+ u16 nominal_rate, input_freq;
+ u8 pllbuf[6] = { 0x67 }, acq_ctl = 0;
+ u16 tps = 0;
+ struct dvb_ofdm_parameters *op = &param->u.ofdm;
- /* These settings set "auto-everything" and start the FSM. */
- zl10353_single_write(fe, 0x55, 0x80);
+ zl10353_single_write(fe, RESET, 0x80);
udelay(200);
zl10353_single_write(fe, 0xEA, 0x01);
udelay(200);
zl10353_single_write(fe, 0xEA, 0x00);
- zl10353_single_write(fe, 0x56, 0x28);
- zl10353_single_write(fe, 0x89, 0x20);
- zl10353_single_write(fe, 0x5E, 0x00);
+ zl10353_single_write(fe, AGC_TARGET, 0x28);
+
+ if (op->transmission_mode != TRANSMISSION_MODE_AUTO)
+ acq_ctl |= (1 << 0);
+ if (op->guard_interval != GUARD_INTERVAL_AUTO)
+ acq_ctl |= (1 << 1);
+ zl10353_single_write(fe, ACQ_CTL, acq_ctl);
- zl10353_calc_nominal_rate(fe, param->u.ofdm.bandwidth, &nominal_rate);
+ switch (op->bandwidth) {
+ case BANDWIDTH_6_MHZ:
+ /* These are extrapolated from the 7 and 8MHz values */
+ zl10353_single_write(fe, MCLK_RATIO, 0x97);
+ zl10353_single_write(fe, 0x64, 0x34);
+ break;
+ case BANDWIDTH_7_MHZ:
+ zl10353_single_write(fe, MCLK_RATIO, 0x86);
+ zl10353_single_write(fe, 0x64, 0x35);
+ break;
+ case BANDWIDTH_8_MHZ:
+ default:
+ zl10353_single_write(fe, MCLK_RATIO, 0x75);
+ zl10353_single_write(fe, 0x64, 0x36);
+ }
+
+ zl10353_calc_nominal_rate(fe, op->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));
+ state->bandwidth = op->bandwidth;
+
+ zl10353_calc_input_freq(fe, &input_freq);
+ zl10353_single_write(fe, INPUT_FREQ_1, msb(input_freq));
+ zl10353_single_write(fe, INPUT_FREQ_0, lsb(input_freq));
+
+ /* Hint at TPS settings */
+ switch (op->code_rate_HP) {
+ case FEC_2_3:
+ tps |= (1 << 7);
+ break;
+ case FEC_3_4:
+ tps |= (2 << 7);
+ break;
+ case FEC_5_6:
+ tps |= (3 << 7);
+ break;
+ case FEC_7_8:
+ tps |= (4 << 7);
+ break;
+ case FEC_1_2:
+ case FEC_AUTO:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (op->code_rate_LP) {
+ case FEC_2_3:
+ tps |= (1 << 4);
+ break;
+ case FEC_3_4:
+ tps |= (2 << 4);
+ break;
+ case FEC_5_6:
+ tps |= (3 << 4);
+ break;
+ case FEC_7_8:
+ tps |= (4 << 4);
+ break;
+ case FEC_1_2:
+ case FEC_AUTO:
+ break;
+ case FEC_NONE:
+ if (op->hierarchy_information == HIERARCHY_AUTO ||
+ op->hierarchy_information == HIERARCHY_NONE)
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (op->constellation) {
+ case QPSK:
+ break;
+ case QAM_AUTO:
+ case QAM_16:
+ tps |= (1 << 13);
+ break;
+ case QAM_64:
+ tps |= (2 << 13);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (op->transmission_mode) {
+ case TRANSMISSION_MODE_2K:
+ case TRANSMISSION_MODE_AUTO:
+ break;
+ case TRANSMISSION_MODE_8K:
+ tps |= (1 << 0);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (op->guard_interval) {
+ case GUARD_INTERVAL_1_32:
+ case GUARD_INTERVAL_AUTO:
+ break;
+ case GUARD_INTERVAL_1_16:
+ tps |= (1 << 2);
+ break;
+ case GUARD_INTERVAL_1_8:
+ tps |= (2 << 2);
+ break;
+ case GUARD_INTERVAL_1_4:
+ tps |= (3 << 2);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (op->hierarchy_information) {
+ case HIERARCHY_AUTO:
+ case HIERARCHY_NONE:
+ break;
+ case HIERARCHY_1:
+ tps |= (1 << 10);
+ break;
+ case HIERARCHY_2:
+ tps |= (2 << 10);
+ break;
+ case HIERARCHY_4:
+ tps |= (3 << 10);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ zl10353_single_write(fe, TPS_GIVEN_1, msb(tps));
+ zl10353_single_write(fe, TPS_GIVEN_0, lsb(tps));
- zl10353_single_write(fe, 0x6C, 0xCD);
- zl10353_single_write(fe, 0x6D, 0x7E);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
- // if there is no attached secondary tuner, we call set_params to program
- // a potential tuner attached somewhere else
+ /*
+ * If there is no tuner attached to the secondary I2C bus, we call
+ * set_params to program a potential tuner attached somewhere else.
+ * Otherwise, we update the PLL registers via calc_regs.
+ */
if (state->config.no_tuner) {
if (fe->ops.tuner_ops.set_params) {
fe->ops.tuner_ops.set_params(fe, param);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
}
+ } else if (fe->ops.tuner_ops.calc_regs) {
+ fe->ops.tuner_ops.calc_regs(fe, param, pllbuf + 1, 5);
+ pllbuf[1] <<= 1;
+ zl10353_write(fe, pllbuf, sizeof(pllbuf));
}
- // if pllbuf is defined, retrieve the settings
- if (fe->ops.tuner_ops.calc_regs) {
- fe->ops.tuner_ops.calc_regs(fe, param, pllbuf+1, 5);
- pllbuf[1] <<= 1;
- } else {
- // fake pllbuf settings
- pllbuf[1] = 0x61 << 1;
- pllbuf[2] = 0;
- pllbuf[3] = 0;
- pllbuf[3] = 0;
- pllbuf[4] = 0;
+ zl10353_single_write(fe, 0x5F, 0x13);
+
+ /* If no attached tuner or invalid PLL registers, just start the FSM. */
+ if (state->config.no_tuner || fe->ops.tuner_ops.calc_regs == NULL)
+ zl10353_single_write(fe, FSM_GO, 0x01);
+ else
+ zl10353_single_write(fe, TUNER_GO, 0x01);
+
+ return 0;
+}
+
+static int zl10353_get_parameters(struct dvb_frontend *fe,
+ struct dvb_frontend_parameters *param)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+ struct dvb_ofdm_parameters *op = &param->u.ofdm;
+ int s6, s9;
+ u16 tps;
+ static const u8 tps_fec_to_api[8] = {
+ FEC_1_2,
+ FEC_2_3,
+ FEC_3_4,
+ FEC_5_6,
+ FEC_7_8,
+ FEC_AUTO,
+ FEC_AUTO,
+ FEC_AUTO
+ };
+
+ s6 = zl10353_read_register(state, STATUS_6);
+ s9 = zl10353_read_register(state, STATUS_9);
+ if (s6 < 0 || s9 < 0)
+ return -EREMOTEIO;
+ if ((s6 & (1 << 5)) == 0 || (s9 & (1 << 4)) == 0)
+ return -EINVAL; /* no FE or TPS lock */
+
+ tps = zl10353_read_register(state, TPS_RECEIVED_1) << 8 |
+ zl10353_read_register(state, TPS_RECEIVED_0);
+
+ op->code_rate_HP = tps_fec_to_api[(tps >> 7) & 7];
+ op->code_rate_LP = tps_fec_to_api[(tps >> 4) & 7];
+
+ switch ((tps >> 13) & 3) {
+ case 0:
+ op->constellation = QPSK;
+ break;
+ case 1:
+ op->constellation = QAM_16;
+ break;
+ case 2:
+ op->constellation = QAM_64;
+ break;
+ default:
+ op->constellation = QAM_AUTO;
+ break;
}
- // there is no call to _just_ start decoding, so we send the pllbuf anyway
- // even if there isn't a PLL attached to the secondary bus
- zl10353_write(fe, pllbuf, sizeof(pllbuf));
+ op->transmission_mode = (tps & 0x01) ? TRANSMISSION_MODE_8K :
+ TRANSMISSION_MODE_2K;
- zl10353_single_write(fe, 0x5F, 0x13);
- zl10353_single_write(fe, 0x70, 0x01);
- udelay(250);
- zl10353_single_write(fe, 0xE4, 0x00);
- zl10353_single_write(fe, 0xE5, 0x2A);
- zl10353_single_write(fe, 0xE9, 0x02);
- zl10353_single_write(fe, 0xE7, 0x40);
- zl10353_single_write(fe, 0xE8, 0x10);
+ switch ((tps >> 2) & 3) {
+ case 0:
+ op->guard_interval = GUARD_INTERVAL_1_32;
+ break;
+ case 1:
+ op->guard_interval = GUARD_INTERVAL_1_16;
+ break;
+ case 2:
+ op->guard_interval = GUARD_INTERVAL_1_8;
+ break;
+ case 3:
+ op->guard_interval = GUARD_INTERVAL_1_4;
+ break;
+ default:
+ op->guard_interval = GUARD_INTERVAL_AUTO;
+ break;
+ }
+
+ switch ((tps >> 10) & 7) {
+ case 0:
+ op->hierarchy_information = HIERARCHY_NONE;
+ break;
+ case 1:
+ op->hierarchy_information = HIERARCHY_1;
+ break;
+ case 2:
+ op->hierarchy_information = HIERARCHY_2;
+ break;
+ case 3:
+ op->hierarchy_information = HIERARCHY_4;
+ break;
+ default:
+ op->hierarchy_information = HIERARCHY_AUTO;
+ break;
+ }
+
+ param->frequency = 0;
+ op->bandwidth = state->bandwidth;
+ param->inversion = INVERSION_AUTO;
return 0;
}
@@ -406,6 +654,7 @@ static struct dvb_frontend_ops zl10353_ops = {
.write = zl10353_write,
.set_frontend = zl10353_set_parameters,
+ .get_frontend = zl10353_get_parameters,
.get_tune_settings = zl10353_get_tune_settings,
.read_status = zl10353_read_status,
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