tda80xx.c

linux-2.6.15.6

		state->code_rate = fec_tab[val & 0x07];
		if (state->status & (FE_HAS_SYNC | FE_HAS_LOCK))
			state->spectral_inversion = inv_tab[(val >> 7) & 0x01];
		else
			state->spectral_inversion = INVERSION_AUTO;
	}
	else {
		state->code_rate = FEC_AUTO;
	}
}

static void tda80xx_worklet(void *priv)
{
	struct tda80xx_state *state = priv;

	tda80xx_writereg(state, 0x00, 0x04);
	enable_irq(state->config->irq);

	tda80xx_read_status_int(state);
}

static void tda80xx_wait_diseqc_fifo(struct tda80xx_state* state)
{
	size_t i;

	for (i = 0; i < 100; i++) {
		if (tda80xx_readreg(state, 0x02) & 0x80)
			break;
		msleep(10);
	}
}

static int tda8044_init(struct dvb_frontend* fe)
{
	struct tda80xx_state* state = fe->demodulator_priv;
	int ret;

	/*
	 * this function is a mess...
	 */

	if ((ret = tda80xx_write(state, 0x00, tda8044_inittab_pre, sizeof(tda8044_inittab_pre))))
		return ret;

	tda80xx_writereg(state, 0x0f, 0x50);
#if 1
	tda80xx_writereg(state, 0x20, 0x8F);		/* FIXME */
	tda80xx_writereg(state, 0x20, state->config->volt18setting);	/* FIXME */
	//tda80xx_writereg(state, 0x00, 0x04);
	tda80xx_writereg(state, 0x00, 0x0C);
#endif
	//tda80xx_writereg(state, 0x00, 0x08); /* Reset AFC1 loop filter */

	tda80xx_write(state, 0x00, tda8044_inittab_post, sizeof(tda8044_inittab_post));

	if (state->config->pll_init) {
		tda80xx_writereg(state, 0x1c, 0x80);
		state->config->pll_init(fe);
		tda80xx_writereg(state, 0x1c, 0x00);
	}

	return 0;
}

static int tda8083_init(struct dvb_frontend* fe)
{
	struct tda80xx_state* state = fe->demodulator_priv;

	tda80xx_write(state, 0x00, tda8083_inittab, sizeof(tda8083_inittab));

	if (state->config->pll_init) {
		tda80xx_writereg(state, 0x1c, 0x80);
		state->config->pll_init(fe);
		tda80xx_writereg(state, 0x1c, 0x00);
	}

	return 0;
}

static int tda80xx_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
{
	struct tda80xx_state* state = fe->demodulator_priv;

	switch (voltage) {
	case SEC_VOLTAGE_13:
		return tda80xx_writereg(state, 0x20, state->config->volt13setting);
	case SEC_VOLTAGE_18:
		return tda80xx_writereg(state, 0x20, state->config->volt18setting);
	case SEC_VOLTAGE_OFF:
		return tda80xx_writereg(state, 0x20, 0);
	default:
		return -EINVAL;
	}
}

static int tda80xx_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
{
	struct tda80xx_state* state = fe->demodulator_priv;

	switch (tone) {
	case SEC_TONE_OFF:
		return tda80xx_writereg(state, 0x29, 0x00);
	case SEC_TONE_ON:
		return tda80xx_writereg(state, 0x29, 0x80);
	default:
		return -EINVAL;
	}
}

static int tda80xx_send_diseqc_msg(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd *cmd)
{
	struct tda80xx_state* state = fe->demodulator_priv;

	if (cmd->msg_len > 6)
		return -EINVAL;

	tda80xx_writereg(state, 0x29, 0x08 | (cmd->msg_len - 3));
	tda80xx_write(state, 0x23, cmd->msg, cmd->msg_len);
	tda80xx_writereg(state, 0x29, 0x0c | (cmd->msg_len - 3));
	tda80xx_wait_diseqc_fifo(state);

	return 0;
}

static int tda80xx_send_diseqc_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t cmd)
{
	struct tda80xx_state* state = fe->demodulator_priv;

	switch (cmd) {
	case SEC_MINI_A:
		tda80xx_writereg(state, 0x29, 0x14);
		break;
	case SEC_MINI_B:
		tda80xx_writereg(state, 0x29, 0x1c);
		break;
	default:
		return -EINVAL;
	}

	tda80xx_wait_diseqc_fifo(state);

	return 0;
}

static int tda80xx_sleep(struct dvb_frontend* fe)
{
	struct tda80xx_state* state = fe->demodulator_priv;

	tda80xx_writereg(state, 0x00, 0x02);	/* enter standby */

	return 0;
}

static int tda80xx_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
	struct tda80xx_state* state = fe->demodulator_priv;

	tda80xx_writereg(state, 0x1c, 0x80);
	state->config->pll_set(fe, p);
	tda80xx_writereg(state, 0x1c, 0x00);

	tda80xx_set_parameters(state, p->inversion, p->u.qpsk.symbol_rate, p->u.qpsk.fec_inner);
	tda80xx_set_clk(state);
	//tda80xx_set_scpc_freq_offset(state);
	state->afc_loop = 1;

	return 0;
}

static int tda80xx_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
	struct tda80xx_state* state = fe->demodulator_priv;

	if (!state->config->irq)
		tda80xx_read_status_int(state);

	p->inversion = state->spectral_inversion;
	p->u.qpsk.fec_inner = state->code_rate;

	return 0;
}

static int tda80xx_read_status(struct dvb_frontend* fe, fe_status_t* status)
{
	struct tda80xx_state* state = fe->demodulator_priv;

	if (!state->config->irq)
		tda80xx_read_status_int(state);
	*status = state->status;

	return 0;
}

static int tda80xx_read_ber(struct dvb_frontend* fe, u32* ber)
{
	struct tda80xx_state* state = fe->demodulator_priv;
	int ret;
	u8 buf[3];

	if ((ret = tda80xx_read(state, 0x0b, buf, sizeof(buf))))
		return ret;

	*ber = ((buf[0] & 0x1f) << 16) | (buf[1] << 8) | buf[2];

	return 0;
}

static int tda80xx_read_signal_strength(struct dvb_frontend* fe, u16* strength)
{
	struct tda80xx_state* state = fe->demodulator_priv;

	u8 gain = ~tda80xx_readreg(state, 0x01);
	*strength = (gain << 8) | gain;

	return 0;
}

static int tda80xx_read_snr(struct dvb_frontend* fe, u16* snr)
{
	struct tda80xx_state* state = fe->demodulator_priv;

	u8 quality = tda80xx_readreg(state, 0x08);
	*snr = (quality << 8) | quality;

	return 0;
}

static int tda80xx_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
	struct tda80xx_state* state = fe->demodulator_priv;

	*ucblocks = tda80xx_readreg(state, 0x0f);
	if (*ucblocks == 0xff)
		*ucblocks = 0xffffffff;

	return 0;
}

static int tda80xx_init(struct dvb_frontend* fe)
{
	struct tda80xx_state* state = fe->demodulator_priv;

	switch(state->id) {
	case ID_TDA8044:
		return tda8044_init(fe);

	case ID_TDA8083:
		return tda8083_init(fe);
	}
	return 0;
}

static void tda80xx_release(struct dvb_frontend* fe)
{
	struct tda80xx_state* state = fe->demodulator_priv;

	if (state->config->irq)
		free_irq(state->config->irq, &state->worklet);

	kfree(state);
}

static struct dvb_frontend_ops tda80xx_ops;

struct dvb_frontend* tda80xx_attach(const struct tda80xx_config* config,
				    struct i2c_adapter* i2c)
{
	struct tda80xx_state* state = NULL;
	int ret;

	/* allocate memory for the internal state */
	state = kmalloc(sizeof(struct tda80xx_state), GFP_KERNEL);
	if (state == NULL) goto error;

	/* setup the state */
	state->config = config;
	state->i2c = i2c;
	memcpy(&state->ops, &tda80xx_ops, sizeof(struct dvb_frontend_ops));
	state->spectral_inversion = INVERSION_AUTO;
	state->code_rate = FEC_AUTO;
	state->status = 0;
	state->afc_loop = 0;

	/* check if the demod is there */
	if (tda80xx_writereg(state, 0x89, 0x00) < 0) goto error;
	state->id = tda80xx_readreg(state, 0x00);

	switch (state->id) {
	case ID_TDA8044:
		state->clk = 96000000;
		printk("tda80xx: Detected tda8044\n");
		break;

	case ID_TDA8083:
		state->clk = 64000000;
		printk("tda80xx: Detected tda8083\n");
		break;

	default:
		goto error;
	}

	/* setup IRQ */
	if (state->config->irq) {
		INIT_WORK(&state->worklet, tda80xx_worklet, state);
		if ((ret = request_irq(state->config->irq, tda80xx_irq, SA_ONESHOT, "tda80xx", &state->worklet)) < 0) {
			printk(KERN_ERR "tda80xx: request_irq failed (%d)\n", ret);
			goto error;
		}
	}

	/* create dvb_frontend */
	state->frontend.ops = &state->ops;
	state->frontend.demodulator_priv = state;
	return &state->frontend;

error:
	kfree(state);
	return NULL;
}

static struct dvb_frontend_ops tda80xx_ops = {

	.info = {
		.name = "Philips TDA80xx DVB-S",
		.type = FE_QPSK,
		.frequency_min = 500000,
		.frequency_max = 2700000,
		.frequency_stepsize = 125,
		.symbol_rate_min = 4500000,
		.symbol_rate_max = 45000000,
		.caps =	FE_CAN_INVERSION_AUTO |
			FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
			FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
			FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
			FE_CAN_QPSK |
			FE_CAN_MUTE_TS
	},

	.release = tda80xx_release,

	.init = tda80xx_init,
	.sleep = tda80xx_sleep,

	.set_frontend = tda80xx_set_frontend,
	.get_frontend = tda80xx_get_frontend,

	.read_status = tda80xx_read_status,
	.read_ber = tda80xx_read_ber,
	.read_signal_strength = tda80xx_read_signal_strength,
	.read_snr = tda80xx_read_snr,
	.read_ucblocks = tda80xx_read_ucblocks,

	.diseqc_send_master_cmd = tda80xx_send_diseqc_msg,
	.diseqc_send_burst = tda80xx_send_diseqc_burst,
	.set_tone = tda80xx_set_tone,
	.set_voltage = tda80xx_set_voltage,
};

module_param(debug, int, 0644);

MODULE_DESCRIPTION("Philips TDA8044 / TDA8083 DVB-S Demodulator driver");
MODULE_AUTHOR("Felix Domke, Andreas Oberritter");
MODULE_LICENSE("GPL");

EXPORT_SYMBOL(tda80xx_attach);