#include "mt352.h"
struct mt352_state {
-
struct i2c_adapter* i2c;
-
+ struct dvb_frontend frontend;
struct dvb_frontend_ops ops;
/* configuration settings */
- const struct mt352_config* config;
-
- struct dvb_frontend frontend;
+ struct mt352_config config;
};
static int debug;
#define dprintk(args...) \
-do { \
+ do { \
if (debug) printk(KERN_DEBUG "mt352: " args); \
-} while (0)
+ } while (0)
static int mt352_single_write(struct dvb_frontend *fe, u8 reg, u8 val)
{
- struct mt352_state* state = (struct mt352_state*) fe->demodulator_priv;
+ struct mt352_state* state = fe->demodulator_priv;
u8 buf[2] = { reg, val };
- struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0,
+ struct i2c_msg msg = { .addr = state->config.demod_address, .flags = 0,
.buf = buf, .len = 2 };
int err = i2c_transfer(state->i2c, &msg, 1);
if (err != 1) {
- dprintk("mt352_write() to reg %x failed (err = %d)!\n", reg, err);
+ printk("mt352_write() to reg %x failed (err = %d)!\n", reg, err);
return err;
-}
- return 0;
+ }
+ return 0;
}
int mt352_write(struct dvb_frontend* fe, u8* ibuf, int ilen)
{
int err,i;
for (i=0; i < ilen-1; i++)
- if ((err = mt352_single_write(fe,ibuf[0]+i,ibuf[i+1])))
+ if ((err = mt352_single_write(fe,ibuf[0]+i,ibuf[i+1])))
return err;
return 0;
}
-static u8 mt352_read_register(struct mt352_state* state, u8 reg)
+static int mt352_read_register(struct mt352_state* state, u8 reg)
{
int ret;
u8 b0 [] = { reg };
u8 b1 [] = { 0 };
- struct i2c_msg msg [] = { { .addr = state->config->demod_address,
+ struct i2c_msg msg [] = { { .addr = state->config.demod_address,
.flags = 0,
.buf = b0, .len = 1 },
- { .addr = state->config->demod_address,
+ { .addr = state->config.demod_address,
.flags = I2C_M_RD,
.buf = b1, .len = 1 } };
ret = i2c_transfer(state->i2c, msg, 2);
- if (ret != 2)
- dprintk("%s: readreg error (ret == %i)\n", __FUNCTION__, ret);
+ if (ret != 2) {
+ printk("%s: readreg error (reg=%d, ret==%i)\n",
+ __FUNCTION__, reg, ret);
+ return ret;
+ }
return b1[0];
}
-u8 mt352_read(struct dvb_frontend *fe, u8 reg)
-{
- return mt352_read_register(fe->demodulator_priv,reg);
-}
-
-
-
-
-
-
-
-
static int mt352_sleep(struct dvb_frontend* fe)
{
static u8 mt352_softdown[] = { CLOCK_CTL, 0x20, 0x08 };
mt352_write(fe, mt352_softdown, sizeof(mt352_softdown));
-
return 0;
}
+static void mt352_calc_nominal_rate(struct mt352_state* state,
+ enum fe_bandwidth bandwidth,
+ unsigned char *buf)
+{
+ u32 adc_clock = 20480; /* 20.340 MHz */
+ u32 bw,value;
+
+ switch (bandwidth) {
+ case BANDWIDTH_6_MHZ:
+ bw = 6;
+ break;
+ case BANDWIDTH_7_MHZ:
+ bw = 7;
+ break;
+ case BANDWIDTH_8_MHZ:
+ default:
+ bw = 8;
+ break;
+ }
+ if (state->config.adc_clock)
+ adc_clock = state->config.adc_clock;
+
+ value = 64 * bw * (1<<16) / (7 * 8);
+ value = value * 1000 / adc_clock;
+ dprintk("%s: bw %d, adc_clock %d => 0x%x\n",
+ __FUNCTION__, bw, adc_clock, value);
+ buf[0] = msb(value);
+ buf[1] = lsb(value);
+}
+
+static void mt352_calc_input_freq(struct mt352_state* state,
+ unsigned char *buf)
+{
+ int adc_clock = 20480; /* 20.480000 MHz */
+ int if2 = 36167; /* 36.166667 MHz */
+ int ife,value;
+
+ if (state->config.adc_clock)
+ adc_clock = state->config.adc_clock;
+ if (state->config.if2)
+ if2 = state->config.if2;
+
+ ife = (2*adc_clock - if2);
+ value = -16374 * ife / adc_clock;
+ dprintk("%s: if2 %d, ife %d, adc_clock %d => %d / 0x%x\n",
+ __FUNCTION__, if2, ife, adc_clock, value, value & 0x3fff);
+ buf[0] = msb(value);
+ buf[1] = lsb(value);
+}
+
static int mt352_set_parameters(struct dvb_frontend* fe,
struct dvb_frontend_parameters *param)
{
- struct mt352_state* state = (struct mt352_state*) fe->demodulator_priv;
- unsigned char buf[14];
+ struct mt352_state* state = fe->demodulator_priv;
+ unsigned char buf[13];
+ static unsigned char tuner_go[] = { 0x5d, 0x01 };
+ static unsigned char fsm_go[] = { 0x5e, 0x01 };
unsigned int tps = 0;
struct dvb_ofdm_parameters *op = ¶m->u.ofdm;
- int i;
switch (op->code_rate_HP) {
case FEC_2_3:
buf[1] = msb(tps); /* TPS_GIVEN_(1|0) */
buf[2] = lsb(tps);
- buf[3] = 0x50;
+ buf[3] = 0x50; // old
+// buf[3] = 0xf4; // pinnacle
- /**
- * these settings assume 20.48MHz f_ADC, for other tuners you might
- * need other values. See p. 33 in the MT352 Design Manual.
- */
- if (op->bandwidth == BANDWIDTH_8_MHZ) {
- buf[4] = 0x72; /* TRL_NOMINAL_RATE_(1|0) */
- buf[5] = 0x49;
- } else if (op->bandwidth == BANDWIDTH_7_MHZ) {
- buf[4] = 0x64;
- buf[5] = 0x00;
- } else { /* 6MHz */
- buf[4] = 0x55;
- buf[5] = 0xb7;
- }
-
- buf[6] = 0x31; /* INPUT_FREQ_(1|0), 20.48MHz clock, 36.166667MHz IF */
- buf[7] = 0x05; /* see MT352 Design Manual page 32 for details */
-
- state->config->pll_set(fe, param, buf+8);
-
- buf[13] = 0x01; /* TUNER_GO!! */
-
- /* Only send the tuning request if the tuner doesn't have the requested
- * parameters already set. Enhances tuning time and prevents stream
- * breakup when retuning the same transponder. */
- for (i = 1; i < 13; i++)
- if (buf[i] != mt352_read_register(state, i + 0x50)) {
- mt352_write(fe, buf, sizeof(buf));
- break;
- }
+ mt352_calc_nominal_rate(state, op->bandwidth, buf+4);
+ mt352_calc_input_freq(state, buf+6);
+ state->config.pll_set(fe, param, buf+8);
+ mt352_write(fe, buf, sizeof(buf));
+ if (state->config.no_tuner) {
+ /* start decoding */
+ mt352_write(fe, fsm_go, 2);
+ } else {
+ /* start tuning */
+ mt352_write(fe, tuner_go, 2);
+ }
return 0;
}
static int mt352_get_parameters(struct dvb_frontend* fe,
struct dvb_frontend_parameters *param)
{
- struct mt352_state* state = (struct mt352_state*) fe->demodulator_priv;
+ struct mt352_state* state = fe->demodulator_priv;
u16 tps;
u16 div;
u8 trl;
};
if ( (mt352_read_register(state,0x00) & 0xC0) != 0xC0 )
- {
return -EINVAL;
- }
/* Use TPS_RECEIVED-registers, not the TPS_CURRENT-registers because
* the mt352 sometimes works with the wrong parameters
param->frequency = ( 500 * (div - IF_FREQUENCYx6) ) / 3 * 1000;
if (trl == 0x72)
- {
op->bandwidth = BANDWIDTH_8_MHZ;
- }
else if (trl == 0x64)
- {
op->bandwidth = BANDWIDTH_7_MHZ;
- }
else
- {
op->bandwidth = BANDWIDTH_6_MHZ;
- }
if (mt352_read_register(state, STATUS_2) & 0x02)
static int mt352_read_status(struct dvb_frontend* fe, fe_status_t* status)
{
- struct mt352_state* state = (struct mt352_state*) fe->demodulator_priv;
- u8 r;
-
- *status = 0;
- r = mt352_read_register (state, STATUS_0);
- if (r & (1 << 4))
- *status = FE_HAS_CARRIER;
- if (r & (1 << 1))
- *status |= FE_HAS_VITERBI;
- if (r & (1 << 5))
- *status |= FE_HAS_LOCK;
-
- r = mt352_read_register (state, STATUS_1);
- if (r & (1 << 1))
- *status |= FE_HAS_SYNC;
-
- r = mt352_read_register (state, STATUS_3);
- if (r & (1 << 6))
- *status |= FE_HAS_SIGNAL;
+ struct mt352_state* state = fe->demodulator_priv;
+ int s0, s1, s3;
+
+ /* FIXME:
+ *
+ * The MT352 design manual from Zarlink states (page 46-47):
+ *
+ * Notes about the TUNER_GO register:
+ *
+ * If the Read_Tuner_Byte (bit-1) is activated, then the tuner status
+ * byte is copied from the tuner to the STATUS_3 register and
+ * completion of the read operation is indicated by bit-5 of the
+ * INTERRUPT_3 register.
+ */
+
+ if ((s0 = mt352_read_register(state, STATUS_0)) < 0)
+ return -EREMOTEIO;
+ if ((s1 = mt352_read_register(state, STATUS_1)) < 0)
+ return -EREMOTEIO;
+ if ((s3 = mt352_read_register(state, STATUS_3)) < 0)
+ return -EREMOTEIO;
+
+ *status = 0;
+ if (s0 & (1 << 4))
+ *status |= FE_HAS_CARRIER;
+ if (s0 & (1 << 1))
+ *status |= FE_HAS_VITERBI;
+ if (s0 & (1 << 5))
+ *status |= FE_HAS_LOCK;
+ if (s1 & (1 << 1))
+ *status |= FE_HAS_SYNC;
+ if (s3 & (1 << 6))
+ *status |= FE_HAS_SIGNAL;
if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
(FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
static int mt352_read_ber(struct dvb_frontend* fe, u32* ber)
{
- struct mt352_state* state = (struct mt352_state*) fe->demodulator_priv;
+ struct mt352_state* state = fe->demodulator_priv;
*ber = (mt352_read_register (state, RS_ERR_CNT_2) << 16) |
(mt352_read_register (state, RS_ERR_CNT_1) << 8) |
(mt352_read_register (state, RS_ERR_CNT_0));
- return 0;
- }
+ return 0;
+}
static int mt352_read_signal_strength(struct dvb_frontend* fe, u16* strength)
{
- struct mt352_state* state = (struct mt352_state*) fe->demodulator_priv;
+ struct mt352_state* state = fe->demodulator_priv;
- u16 signal = (mt352_read_register (state, AGC_GAIN_3) << 8) |
- (mt352_read_register (state, AGC_GAIN_2));
+ u16 signal = ((mt352_read_register(state, AGC_GAIN_1) << 8) & 0x0f) |
+ (mt352_read_register(state, AGC_GAIN_0));
*strength = ~signal;
return 0;
static int mt352_read_snr(struct dvb_frontend* fe, u16* snr)
{
- struct mt352_state* state = (struct mt352_state*) fe->demodulator_priv;
+ struct mt352_state* state = fe->demodulator_priv;
u8 _snr = mt352_read_register (state, SNR);
*snr = (_snr << 8) | _snr;
static int mt352_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
- struct mt352_state* state = (struct mt352_state*) fe->demodulator_priv;
+ struct mt352_state* state = fe->demodulator_priv;
*ucblocks = (mt352_read_register (state, RS_UBC_1) << 8) |
(mt352_read_register (state, RS_UBC_0));
return 0;
- }
+}
static int mt352_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fe_tune_settings)
{
fe_tune_settings->max_drift = 0;
return 0;
- }
+}
static int mt352_init(struct dvb_frontend* fe)
{
- struct mt352_state* state = (struct mt352_state*) fe->demodulator_priv;
+ struct mt352_state* state = fe->demodulator_priv;
static u8 mt352_reset_attach [] = { RESET, 0xC0 };
+ dprintk("%s: hello\n",__FUNCTION__);
+
if ((mt352_read_register(state, CLOCK_CTL) & 0x10) == 0 ||
(mt352_read_register(state, CONFIG) & 0x20) == 0) {
- /* Do a "hard" reset */
+ /* Do a "hard" reset */
mt352_write(fe, mt352_reset_attach, sizeof(mt352_reset_attach));
- return state->config->demod_init(fe);
+ return state->config.demod_init(fe);
}
return 0;
- }
+}
static void mt352_release(struct dvb_frontend* fe)
{
- struct mt352_state* state = (struct mt352_state*) fe->demodulator_priv;
- kfree(state);
- }
+ struct mt352_state* state = fe->demodulator_priv;
+ kfree(state);
+}
static struct dvb_frontend_ops mt352_ops;
struct mt352_state* state = NULL;
/* allocate memory for the internal state */
- state = (struct mt352_state*) kmalloc(sizeof(struct mt352_state), GFP_KERNEL);
+ state = kmalloc(sizeof(struct mt352_state), GFP_KERNEL);
if (state == NULL) goto error;
+ memset(state,0,sizeof(*state));
/* setup the state */
- state->config = config;
state->i2c = i2c;
+ memcpy(&state->config,config,sizeof(struct mt352_config));
memcpy(&state->ops, &mt352_ops, sizeof(struct dvb_frontend_ops));
/* check if the demod is there */
return &state->frontend;
error:
- if (state) kfree(state);
+ kfree(state);
return NULL;
}
EXPORT_SYMBOL(mt352_attach);
EXPORT_SYMBOL(mt352_write);
-EXPORT_SYMBOL(mt352_read);
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