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Commit 28fd31f8 authored by Antti Palosaari's avatar Antti Palosaari Committed by Mauro Carvalho Chehab
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[media] e4000: convert DVB tuner to I2C driver model 



Driver conversion from proprietary DVB tuner model to more
general I2C driver model.

Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent 8ea5488a

drivers/media/tuners/e4000.c

+71 −44
Original line number Diff line number Diff line
@@ -31,7 +31,7 @@ static int e4000_wr_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len) 
	u8 buf[MAX_XFER_SIZE];

	struct i2c_msg msg[1] = {

		{

			.addr = priv->cfg->i2c_addr,

			.addr = priv->client->addr,

			.flags = 0,

			.len = 1 + len,

			.buf = buf,
@@ -39,7 +39,7 @@ static int e4000_wr_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len) 
	};



	if (1 + len > sizeof(buf)) {

		dev_warn(&priv->i2c->dev,

		dev_warn(&priv->client->dev,

			 "%s: i2c wr reg=%04x: len=%d is too big!\n",

			 KBUILD_MODNAME, reg, len);

		return -EINVAL;
@@ -48,11 +48,11 @@ static int e4000_wr_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len) 
	buf[0] = reg;

	memcpy(&buf[1], val, len);



	ret = i2c_transfer(priv->i2c, msg, 1);

	ret = i2c_transfer(priv->client->adapter, msg, 1);

	if (ret == 1) {

		ret = 0;

	} else {

		dev_warn(&priv->i2c->dev,

		dev_warn(&priv->client->dev,

				"%s: i2c wr failed=%d reg=%02x len=%d\n",

				KBUILD_MODNAME, ret, reg, len);

		ret = -EREMOTEIO;
@@ -67,12 +67,12 @@ static int e4000_rd_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len) 
	u8 buf[MAX_XFER_SIZE];

	struct i2c_msg msg[2] = {

		{

			.addr = priv->cfg->i2c_addr,

			.addr = priv->client->addr,

			.flags = 0,

			.len = 1,

			.buf = &reg,

		}, {

			.addr = priv->cfg->i2c_addr,

			.addr = priv->client->addr,

			.flags = I2C_M_RD,

			.len = len,

			.buf = buf,
@@ -80,18 +80,18 @@ static int e4000_rd_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len) 
	};



	if (len > sizeof(buf)) {

		dev_warn(&priv->i2c->dev,

		dev_warn(&priv->client->dev,

			 "%s: i2c rd reg=%04x: len=%d is too big!\n",

			 KBUILD_MODNAME, reg, len);

		return -EINVAL;

	}



	ret = i2c_transfer(priv->i2c, msg, 2);

	ret = i2c_transfer(priv->client->adapter, msg, 2);

	if (ret == 2) {

		memcpy(val, buf, len);

		ret = 0;

	} else {

		dev_warn(&priv->i2c->dev,

		dev_warn(&priv->client->dev,

				"%s: i2c rd failed=%d reg=%02x len=%d\n",

				KBUILD_MODNAME, ret, reg, len);

		ret = -EREMOTEIO;
@@ -117,7 +117,7 @@ static int e4000_init(struct dvb_frontend *fe) 
	struct e4000_priv *priv = fe->tuner_priv;

	int ret;



	dev_dbg(&priv->i2c->dev, "%s:\n", __func__);

	dev_dbg(&priv->client->dev, "%s:\n", __func__);



	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 1);
@@ -186,7 +186,7 @@ static int e4000_init(struct dvb_frontend *fe) 
	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 0);



	dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);

	dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);

	return ret;

}
@@ -195,7 +195,7 @@ static int e4000_sleep(struct dvb_frontend *fe) 
	struct e4000_priv *priv = fe->tuner_priv;

	int ret;



	dev_dbg(&priv->i2c->dev, "%s:\n", __func__);

	dev_dbg(&priv->client->dev, "%s:\n", __func__);



	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 1);
@@ -212,7 +212,7 @@ static int e4000_sleep(struct dvb_frontend *fe) 
	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 0);



	dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);

	dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);

	return ret;

}
@@ -224,7 +224,7 @@ static int e4000_set_params(struct dvb_frontend *fe) 
	unsigned int f_vco;

	u8 buf[5], i_data[4], q_data[4];



	dev_dbg(&priv->i2c->dev,

	dev_dbg(&priv->client->dev,

			"%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n",

			__func__, c->delivery_system, c->frequency,

			c->bandwidth_hz);
@@ -253,14 +253,15 @@ static int e4000_set_params(struct dvb_frontend *fe) 
	 * or more.

	 */

	f_vco = c->frequency * e4000_pll_lut[i].mul;

	sigma_delta = div_u64(0x10000ULL * (f_vco % priv->cfg->clock), priv->cfg->clock);

	buf[0] = f_vco / priv->cfg->clock;

	sigma_delta = div_u64(0x10000ULL * (f_vco % priv->clock), priv->clock);

	buf[0] = f_vco / priv->clock;

	buf[1] = (sigma_delta >> 0) & 0xff;

	buf[2] = (sigma_delta >> 8) & 0xff;

	buf[3] = 0x00;

	buf[4] = e4000_pll_lut[i].div;



	dev_dbg(&priv->i2c->dev, "%s: f_vco=%u pll div=%d sigma_delta=%04x\n",

	dev_dbg(&priv->client->dev,

			"%s: f_vco=%u pll div=%d sigma_delta=%04x\n",

			__func__, f_vco, buf[0], sigma_delta);



	ret = e4000_wr_regs(priv, 0x09, buf, 5);
@@ -369,7 +370,7 @@ static int e4000_set_params(struct dvb_frontend *fe) 
	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 0);



	dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);

	dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);

	return ret;

}
@@ -377,24 +378,13 @@ static int e4000_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) 
{

	struct e4000_priv *priv = fe->tuner_priv;



	dev_dbg(&priv->i2c->dev, "%s:\n", __func__);

	dev_dbg(&priv->client->dev, "%s:\n", __func__);



	*frequency = 0; /* Zero-IF */



	return 0;

}



static int e4000_release(struct dvb_frontend *fe)

{

	struct e4000_priv *priv = fe->tuner_priv;



	dev_dbg(&priv->i2c->dev, "%s:\n", __func__);



	kfree(fe->tuner_priv);



	return 0;

}



static const struct dvb_tuner_ops e4000_tuner_ops = {

	.info = {

		.name           = "Elonics E4000",
@@ -402,8 +392,6 @@ static const struct dvb_tuner_ops e4000_tuner_ops = { 
		.frequency_max  = 862000000,

	},



	.release = e4000_release,



	.init = e4000_init,

	.sleep = e4000_sleep,

	.set_params = e4000_set_params,
@@ -411,9 +399,11 @@ static const struct dvb_tuner_ops e4000_tuner_ops = { 
	.get_if_frequency = e4000_get_if_frequency,

};



struct dvb_frontend *e4000_attach(struct dvb_frontend *fe,

		struct i2c_adapter *i2c, const struct e4000_config *cfg)

static int e4000_probe(struct i2c_client *client,

		const struct i2c_device_id *id)

{

	struct e4000_config *cfg = client->dev.platform_data;

	struct dvb_frontend *fe = cfg->fe;

	struct e4000_priv *priv;

	int ret;

	u8 chip_id;
@@ -424,29 +414,33 @@ struct dvb_frontend *e4000_attach(struct dvb_frontend *fe, 
	priv = kzalloc(sizeof(struct e4000_priv), GFP_KERNEL);

	if (!priv) {

		ret = -ENOMEM;

		dev_err(&i2c->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);

		dev_err(&client->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);

		goto err;

	}



	priv->cfg = cfg;

	priv->i2c = i2c;

	priv->clock = cfg->clock;

	priv->client = client;

	priv->fe = cfg->fe;



	/* check if the tuner is there */

	ret = e4000_rd_reg(priv, 0x02, &chip_id);

	if (ret < 0)

		goto err;



	dev_dbg(&priv->i2c->dev, "%s: chip_id=%02x\n", __func__, chip_id);

	dev_dbg(&priv->client->dev,

			"%s: chip_id=%02x\n", __func__, chip_id);



	if (chip_id != 0x40)

	if (chip_id != 0x40) {

		ret = -ENODEV;

		goto err;

	}



	/* put sleep as chip seems to be in normal mode by default */

	ret = e4000_wr_reg(priv, 0x00, 0x00);

	if (ret < 0)

		goto err;



	dev_info(&priv->i2c->dev,

	dev_info(&priv->client->dev,

			"%s: Elonics E4000 successfully identified\n",

			KBUILD_MODNAME);
@@ -457,16 +451,49 @@ struct dvb_frontend *e4000_attach(struct dvb_frontend *fe, 
	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 0);



	return fe;

	i2c_set_clientdata(client, priv);



	return 0;

err:

	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 0);



	dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);

	dev_dbg(&client->dev, "%s: failed=%d\n", __func__, ret);

	kfree(priv);

	return NULL;

	return ret;

}

EXPORT_SYMBOL(e4000_attach);



static int e4000_remove(struct i2c_client *client)

{

	struct e4000_priv *priv = i2c_get_clientdata(client);

	struct dvb_frontend *fe = priv->fe;



	dev_dbg(&client->dev, "%s:\n", __func__);



	memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));

	fe->tuner_priv = NULL;

	kfree(priv);



	return 0;

}



static const struct i2c_device_id e4000_id[] = {

	{"e4000", 0},

	{}

};

MODULE_DEVICE_TABLE(i2c, e4000_id);



static struct i2c_driver e4000_driver = {

	.driver = {

		.owner	= THIS_MODULE,

		.name	= "e4000",

	},

	.probe		= e4000_probe,

	.remove		= e4000_remove,

	.id_table	= e4000_id,

};



module_i2c_driver(e4000_driver);



MODULE_DESCRIPTION("Elonics E4000 silicon tuner driver");

MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");

drivers/media/tuners/e4000.h

+6 −15
Original line number Diff line number Diff line
@@ -24,12 +24,15 @@ 
#include <linux/kconfig.h>

#include "dvb_frontend.h"



struct e4000_config {

/*

 * I2C address

 * 0x64, 0x65, 0x66, 0x67

 */

	u8 i2c_addr;

struct e4000_config {

	/*

	 * frontend

	 */

	struct dvb_frontend *fe;



	/*

	 * clock
@@ -37,16 +40,4 @@ struct e4000_config { 
	u32 clock;

};



#if IS_ENABLED(CONFIG_MEDIA_TUNER_E4000)

extern struct dvb_frontend *e4000_attach(struct dvb_frontend *fe,

		struct i2c_adapter *i2c, const struct e4000_config *cfg);

#else

static inline struct dvb_frontend *e4000_attach(struct dvb_frontend *fe,

		struct i2c_adapter *i2c, const struct e4000_config *cfg)

{

	dev_warn(&i2c->dev, "%s: driver disabled by Kconfig\n", __func__);

	return NULL;

}

#endif



#endif

drivers/media/tuners/e4000_priv.h

+3 −2
Original line number Diff line number Diff line
@@ -24,8 +24,9 @@ 
#include "e4000.h"



struct e4000_priv {

	const struct e4000_config *cfg;

	struct i2c_adapter *i2c;

	struct i2c_client *client;

	u32 clock;

	struct dvb_frontend *fe;

};



struct e4000_pll {

drivers/media/usb/dvb-usb-v2/rtl28xxu.c

+45 −11
Original line number Diff line number Diff line
@@ -852,11 +852,6 @@ static int rtl2831u_tuner_attach(struct dvb_usb_adapter *adap) 
	return ret;

}



static const struct e4000_config rtl2832u_e4000_config = {

	.i2c_addr = 0x64,

	.clock = 28800000,

};



static const struct fc2580_config rtl2832u_fc2580_config = {

	.i2c_addr = 0x56,

	.clock = 16384000,
@@ -890,10 +885,14 @@ static int rtl2832u_tuner_attach(struct dvb_usb_adapter *adap) 
	int ret;

	struct dvb_usb_device *d = adap_to_d(adap);

	struct rtl28xxu_priv *priv = d_to_priv(d);

	struct dvb_frontend *fe;

	struct dvb_frontend *fe = NULL;

	struct i2c_board_info info;

	struct i2c_client *client;



	dev_dbg(&d->udev->dev, "%s:\n", __func__);



	memset(&info, 0, sizeof(struct i2c_board_info));



	switch (priv->tuner) {

	case TUNER_RTL2832_FC0012:

		fe = dvb_attach(fc0012_attach, adap->fe[0],
@@ -913,9 +912,28 @@ static int rtl2832u_tuner_attach(struct dvb_usb_adapter *adap) 
		adap->fe[0]->ops.read_signal_strength =

				adap->fe[0]->ops.tuner_ops.get_rf_strength;

		return 0;

	case TUNER_RTL2832_E4000:

		fe = dvb_attach(e4000_attach, adap->fe[0], &d->i2c_adap,

				&rtl2832u_e4000_config);

	case TUNER_RTL2832_E4000: {

			struct e4000_config e4000_config = {

				.fe = adap->fe[0],

				.clock = 28800000,

			};



			strlcpy(info.type, "e4000", I2C_NAME_SIZE);

			info.addr = 0x64;

			info.platform_data = &e4000_config;



			request_module(info.type);

			client = i2c_new_device(&d->i2c_adap, &info);

			if (client == NULL || client->dev.driver == NULL)

				break;



			if (!try_module_get(client->dev.driver->owner)) {

				i2c_unregister_device(client);

				break;

			}



			priv->client = client;

		}

		break;

	case TUNER_RTL2832_FC2580:

		fe = dvb_attach(fc2580_attach, adap->fe[0], &d->i2c_adap,
@@ -964,12 +982,11 @@ static int rtl2832u_tuner_attach(struct dvb_usb_adapter *adap) 
				adap->fe[0]->ops.tuner_ops.get_rf_strength;

		break;

	default:

		fe = NULL;

		dev_err(&d->udev->dev, "%s: unknown tuner=%d\n", KBUILD_MODNAME,

				priv->tuner);

	}



	if (fe == NULL) {

	if (fe == NULL && priv->client == NULL) {

		ret = -ENODEV;

		goto err;

	}
@@ -1014,6 +1031,22 @@ static int rtl28xxu_init(struct dvb_usb_device *d) 
	return ret;

}



static void rtl28xxu_exit(struct dvb_usb_device *d)

{

	struct rtl28xxu_priv *priv = d->priv;

	struct i2c_client *client = priv->client;



	dev_dbg(&d->udev->dev, "%s:\n", __func__);



	/* remove I2C tuner */

	if (client) {

		module_put(client->dev.driver->owner);

		i2c_unregister_device(client);

	}



	return;

}



static int rtl2831u_power_ctrl(struct dvb_usb_device *d, int onoff)

{

	int ret;
@@ -1376,6 +1409,7 @@ static const struct dvb_usb_device_properties rtl2832u_props = { 
	.frontend_attach = rtl2832u_frontend_attach,

	.tuner_attach = rtl2832u_tuner_attach,

	.init = rtl28xxu_init,

	.exit = rtl28xxu_exit,

	.get_rc_config = rtl2832u_get_rc_config,



	.num_adapters = 1,

drivers/media/usb/dvb-usb-v2/rtl28xxu.h

+1 −0
Original line number Diff line number Diff line
@@ -56,6 +56,7 @@ struct rtl28xxu_priv { 
	char *tuner_name;

	u8 page; /* integrated demod active register page */

	bool rc_active;

	struct i2c_client *client;

};



enum rtl28xxu_chip_id {