dvb-pll.c

trident tm5600的linux驱动

	.set   = opera1_bw,
	.count = 8,
	.entries = {
		{ 1064000, 500, 0xe5, 0xc6 },
		{ 1169000, 500, 0xe5, 0xe6 },
		{ 1299000, 500, 0xe5, 0x24 },
		{ 1444000, 500, 0xe5, 0x44 },
		{ 1606000, 500, 0xe5, 0x64 },
		{ 1777000, 500, 0xe5, 0x84 },
		{ 1941000, 500, 0xe5, 0xa4 },
		{ 2250000, 500, 0xe5, 0xc4 },
	}
};

static void samsung_dtos403ih102a_set(struct dvb_frontend *fe, u8 *buf,
		       const struct dvb_frontend_parameters *params)
{
	struct dvb_pll_priv *priv = fe->tuner_priv;
	struct i2c_msg msg = {
		.addr = priv->pll_i2c_address,
		.flags = 0,
		.buf = buf,
		.len = 4
	};
	int result;

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);

	result = i2c_transfer(priv->i2c, &msg, 1);
	if (result != 1)
		printk(KERN_ERR "%s: i2c_transfer failed:%d",
			__func__, result);

	buf[2] = 0x9e;
	buf[3] = 0x90;

	return;
}

/* unknown pll used in Samsung DTOS403IH102A DVB-C tuner */
static struct dvb_pll_desc dvb_pll_samsung_dtos403ih102a = {
	.name   = "Samsung DTOS403IH102A",
	.min    =  44250000,
	.max    = 858000000,
	.iffreq =  36125000,
	.count  = 8,
	.set    = samsung_dtos403ih102a_set,
	.entries = {
		{ 135000000, 62500, 0xbe, 0x01 },
		{ 177000000, 62500, 0xf6, 0x01 },
		{ 370000000, 62500, 0xbe, 0x02 },
		{ 450000000, 62500, 0xf6, 0x02 },
		{ 466000000, 62500, 0xfe, 0x02 },
		{ 538000000, 62500, 0xbe, 0x08 },
		{ 826000000, 62500, 0xf6, 0x08 },
		{ 999999999, 62500, 0xfe, 0x08 },
	}
};

/* ----------------------------------------------------------- */

static struct dvb_pll_desc *pll_list[] = {
	[DVB_PLL_UNDEFINED]              = NULL,
	[DVB_PLL_THOMSON_DTT7579]        = &dvb_pll_thomson_dtt7579,
	[DVB_PLL_THOMSON_DTT759X]        = &dvb_pll_thomson_dtt759x,
	[DVB_PLL_LG_Z201]                = &dvb_pll_lg_z201,
	[DVB_PLL_UNKNOWN_1]              = &dvb_pll_unknown_1,
	[DVB_PLL_TUA6010XS]              = &dvb_pll_tua6010xs,
	[DVB_PLL_ENV57H1XD5]             = &dvb_pll_env57h1xd5,
	[DVB_PLL_TUA6034]                = &dvb_pll_tua6034,
	[DVB_PLL_TDA665X]                = &dvb_pll_tda665x,
	[DVB_PLL_TDED4]                  = &dvb_pll_tded4,
	[DVB_PLL_TDHU2]                  = &dvb_pll_tdhu2,
	[DVB_PLL_SAMSUNG_TBMV]           = &dvb_pll_samsung_tbmv,
	[DVB_PLL_PHILIPS_SD1878_TDA8261] = &dvb_pll_philips_sd1878_tda8261,
	[DVB_PLL_OPERA1]                 = &dvb_pll_opera1,
	[DVB_PLL_SAMSUNG_DTOS403IH102A]  = &dvb_pll_samsung_dtos403ih102a,
};

/* ----------------------------------------------------------- */
/* code                                                        */

static int dvb_pll_configure(struct dvb_frontend *fe, u8 *buf,
			     const struct dvb_frontend_parameters *params)
{
	struct dvb_pll_priv *priv = fe->tuner_priv;
	struct dvb_pll_desc *desc = priv->pll_desc;
	u32 div;
	int i;

	if (params->frequency != 0 && (params->frequency < desc->min ||
				       params->frequency > desc->max))
		return -EINVAL;

	for (i = 0; i < desc->count; i++) {
		if (params->frequency > desc->entries[i].limit)
			continue;
		break;
	}

	if (debug)
		printk("pll: %s: freq=%d | i=%d/%d\n", desc->name,
		       params->frequency, i, desc->count);
	if (i == desc->count)
		return -EINVAL;

	div = (params->frequency + desc->iffreq +
	       desc->entries[i].stepsize/2) / desc->entries[i].stepsize;
	buf[0] = div >> 8;
	buf[1] = div & 0xff;
	buf[2] = desc->entries[i].config;
	buf[3] = desc->entries[i].cb;

	if (desc->set)
		desc->set(fe, buf, params);

	if (debug)
		printk("pll: %s: div=%d | buf=0x%02x,0x%02x,0x%02x,0x%02x\n",
		       desc->name, div, buf[0], buf[1], buf[2], buf[3]);

	// calculate the frequency we set it to
	return (div * desc->entries[i].stepsize) - desc->iffreq;
}

static int dvb_pll_release(struct dvb_frontend *fe)
{
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;
	return 0;
}

static int dvb_pll_sleep(struct dvb_frontend *fe)
{
	struct dvb_pll_priv *priv = fe->tuner_priv;

	if (priv->i2c == NULL)
		return -EINVAL;

	if (priv->pll_desc->sleepdata) {
		struct i2c_msg msg = { .flags = 0,
			.addr = priv->pll_i2c_address,
			.buf = priv->pll_desc->sleepdata + 1,
			.len = priv->pll_desc->sleepdata[0] };

		int result;

		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 1);
		if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
			return result;
		}
		return 0;
	}
	/* Shouldn't be called when initdata is NULL, maybe BUG()? */
	return -EINVAL;
}

static int dvb_pll_set_params(struct dvb_frontend *fe,
			      struct dvb_frontend_parameters *params)
{
	struct dvb_pll_priv *priv = fe->tuner_priv;
	u8 buf[4];
	struct i2c_msg msg =
		{ .addr = priv->pll_i2c_address, .flags = 0,
		  .buf = buf, .len = sizeof(buf) };
	int result;
	u32 frequency = 0;

	if (priv->i2c == NULL)
		return -EINVAL;

	if ((result = dvb_pll_configure(fe, buf, params)) < 0)
		return result;
	else
		frequency = result;

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
	if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
		return result;
	}

	priv->frequency = frequency;
	priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;

	return 0;
}

static int dvb_pll_calc_regs(struct dvb_frontend *fe,
			     struct dvb_frontend_parameters *params,
			     u8 *buf, int buf_len)
{
	struct dvb_pll_priv *priv = fe->tuner_priv;
	int result;
	u32 frequency = 0;

	if (buf_len < 5)
		return -EINVAL;

	if ((result = dvb_pll_configure(fe, buf+1, params)) < 0)
		return result;
	else
		frequency = result;

	buf[0] = priv->pll_i2c_address;

	priv->frequency = frequency;
	priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;

	return 5;
}

static int dvb_pll_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	struct dvb_pll_priv *priv = fe->tuner_priv;
	*frequency = priv->frequency;
	return 0;
}

static int dvb_pll_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
	struct dvb_pll_priv *priv = fe->tuner_priv;
	*bandwidth = priv->bandwidth;
	return 0;
}

static int dvb_pll_init(struct dvb_frontend *fe)
{
	struct dvb_pll_priv *priv = fe->tuner_priv;

	if (priv->i2c == NULL)
		return -EINVAL;

	if (priv->pll_desc->initdata) {
		struct i2c_msg msg = { .flags = 0,
			.addr = priv->pll_i2c_address,
			.buf = priv->pll_desc->initdata + 1,
			.len = priv->pll_desc->initdata[0] };

		int result;
		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 1);
		if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
			return result;
		}
		return 0;
	}
	/* Shouldn't be called when initdata is NULL, maybe BUG()? */
	return -EINVAL;
}

static struct dvb_tuner_ops dvb_pll_tuner_ops = {
	.release = dvb_pll_release,
	.sleep = dvb_pll_sleep,
	.init = dvb_pll_init,
	.set_params = dvb_pll_set_params,
	.calc_regs = dvb_pll_calc_regs,
	.get_frequency = dvb_pll_get_frequency,
	.get_bandwidth = dvb_pll_get_bandwidth,
};

struct dvb_frontend *dvb_pll_attach(struct dvb_frontend *fe, int pll_addr,
				    struct i2c_adapter *i2c,
				    unsigned int pll_desc_id)
{
	u8 b1 [] = { 0 };
	struct i2c_msg msg = { .addr = pll_addr, .flags = I2C_M_RD,
			       .buf = b1, .len = 1 };
	struct dvb_pll_priv *priv = NULL;
	int ret;
	struct dvb_pll_desc *desc;

	if ((id[dvb_pll_devcount] > DVB_PLL_UNDEFINED) &&
	    (id[dvb_pll_devcount] < ARRAY_SIZE(pll_list)))
		pll_desc_id = id[dvb_pll_devcount];

	BUG_ON(pll_desc_id < 1 || pll_desc_id >= ARRAY_SIZE(pll_list));

	desc = pll_list[pll_desc_id];

	if (i2c != NULL) {
		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 1);

		ret = i2c_transfer (i2c, &msg, 1);
		if (ret != 1)
			return NULL;
		if (fe->ops.i2c_gate_ctrl)
			     fe->ops.i2c_gate_ctrl(fe, 0);
	}

	priv = kzalloc(sizeof(struct dvb_pll_priv), GFP_KERNEL);
	if (priv == NULL)
		return NULL;

	priv->pll_i2c_address = pll_addr;
	priv->i2c = i2c;
	priv->pll_desc = desc;
	priv->nr = dvb_pll_devcount++;

	memcpy(&fe->ops.tuner_ops, &dvb_pll_tuner_ops,
	       sizeof(struct dvb_tuner_ops));

	strncpy(fe->ops.tuner_ops.info.name, desc->name,
		sizeof(fe->ops.tuner_ops.info.name));
	fe->ops.tuner_ops.info.frequency_min = desc->min;
	fe->ops.tuner_ops.info.frequency_max = desc->max;
	if (!desc->initdata)
		fe->ops.tuner_ops.init = NULL;
	if (!desc->sleepdata)
		fe->ops.tuner_ops.sleep = NULL;

	fe->tuner_priv = priv;

	if ((debug) || (id[priv->nr] == pll_desc_id)) {
		printk("dvb-pll[%d]", priv->nr);
		if (i2c != NULL)
			printk(" %d-%04x", i2c_adapter_id(i2c), pll_addr);
		printk(": id# %d (%s) attached, %s\n", pll_desc_id, desc->name,
		       id[priv->nr] == pll_desc_id ?
				"insmod option" : "autodetected");
	}

	return fe;
}
EXPORT_SYMBOL(dvb_pll_attach);

MODULE_DESCRIPTION("dvb pll library");
MODULE_AUTHOR("Gerd Knorr");
MODULE_LICENSE("GPL");