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Commit 22e59e72 authored by Antti Palosaari's avatar Antti Palosaari Committed by Mauro Carvalho Chehab
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media: af9013: add i2c mux adapter for tuner bus 



Add muxed i2c adapter for demod tuner i2c bus gate control.

Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent 3b536127

drivers/media/dvb-frontends/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -462,7 +462,7 @@ config DVB_TDA10048 


config DVB_AF9013

	tristate "Afatech AF9013 demodulator"

	depends on DVB_CORE && I2C

	depends on DVB_CORE && I2C && I2C_MUX

	select REGMAP

	default m if !MEDIA_SUBDRV_AUTOSELECT

	help

drivers/media/dvb-frontends/af9013.c

+108 −18
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
struct af9013_state {

	struct i2c_client *client;

	struct regmap *regmap;

	struct i2c_mux_core *muxc;

	struct dvb_frontend fe;

	u32 clk;

	u8 tuner;
@@ -1257,9 +1258,65 @@ static struct dvb_frontend *af9013_get_dvb_frontend(struct i2c_client *client) 
	return &state->fe;

}



static struct i2c_adapter *af9013_get_i2c_adapter(struct i2c_client *client)

{

	struct af9013_state *state = i2c_get_clientdata(client);



	dev_dbg(&client->dev, "\n");



	return state->muxc->adapter[0];

}



/*

 * XXX: Hackish solution. We use virtual register, reg bit 16, to carry info

 * about i2c adapter locking. Own locking is needed because i2c mux call has

 * already locked i2c adapter.

 */

static int af9013_select(struct i2c_mux_core *muxc, u32 chan)

{

	struct af9013_state *state = i2c_mux_priv(muxc);

	struct i2c_client *client = state->client;

	int ret;



	dev_dbg(&client->dev, "\n");



	if (state->ts_mode == AF9013_TS_MODE_USB)

		ret = regmap_update_bits(state->regmap, 0x1d417, 0x08, 0x08);

	else

		ret = regmap_update_bits(state->regmap, 0x1d607, 0x04, 0x04);

	if (ret)

		goto err;



	return 0;

err:

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

	return ret;

}



static int af9013_deselect(struct i2c_mux_core *muxc, u32 chan)

{

	struct af9013_state *state = i2c_mux_priv(muxc);

	struct i2c_client *client = state->client;

	int ret;



	dev_dbg(&client->dev, "\n");



	if (state->ts_mode == AF9013_TS_MODE_USB)

		ret = regmap_update_bits(state->regmap, 0x1d417, 0x08, 0x00);

	else

		ret = regmap_update_bits(state->regmap, 0x1d607, 0x04, 0x00);

	if (ret)

		goto err;



	return 0;

err:

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

	return ret;

}



/* Own I2C access routines needed for regmap as chip uses extra command byte */

static int af9013_wregs(struct i2c_client *client, u8 cmd, u16 reg,

			const u8 *val, int len)

			const u8 *val, int len, u8 lock)

{

	int ret;

	u8 buf[21];
@@ -1281,7 +1338,12 @@ static int af9013_wregs(struct i2c_client *client, u8 cmd, u16 reg, 
	buf[1] = (reg >> 0) & 0xff;

	buf[2] = cmd;

	memcpy(&buf[3], val, len);

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



	if (lock)

		i2c_lock_adapter(client->adapter);

	ret = __i2c_transfer(client->adapter, msg, 1);

	if (lock)

		i2c_unlock_adapter(client->adapter);

	if (ret < 0) {

		goto err;

	} else if (ret != 1) {
@@ -1296,7 +1358,7 @@ static int af9013_wregs(struct i2c_client *client, u8 cmd, u16 reg, 
}



static int af9013_rregs(struct i2c_client *client, u8 cmd, u16 reg,

			u8 *val, int len)

			u8 *val, int len, u8 lock)

{

	int ret;

	u8 buf[3];
@@ -1317,7 +1379,12 @@ static int af9013_rregs(struct i2c_client *client, u8 cmd, u16 reg, 
	buf[0] = (reg >> 8) & 0xff;

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

	buf[2] = cmd;

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



	if (lock)

		i2c_lock_adapter(client->adapter);

	ret = __i2c_transfer(client->adapter, msg, 2);

	if (lock)

		i2c_unlock_adapter(client->adapter);

	if (ret < 0) {

		goto err;

	} else if (ret != 2) {
@@ -1337,25 +1404,27 @@ static int af9013_regmap_write(void *context, const void *data, size_t count) 
	struct af9013_state *state = i2c_get_clientdata(client);

	int ret, i;

	u8 cmd;

	u16 reg = ((u8 *)data)[0] << 8|((u8 *)data)[1] << 0;

	u8 *val = &((u8 *)data)[2];

	const unsigned int len = count - 2;

	u8 lock = !((u8 *)data)[0];

	u16 reg = ((u8 *)data)[1] << 8 | ((u8 *)data)[2] << 0;

	u8 *val = &((u8 *)data)[3];

	const unsigned int len = count - 3;



	if (state->ts_mode == AF9013_TS_MODE_USB && (reg & 0xff00) != 0xae00) {

		cmd = 0 << 7|0 << 6|(len - 1) << 2|1 << 1|1 << 0;

		ret = af9013_wregs(client, cmd, reg, val, len);

		ret = af9013_wregs(client, cmd, reg, val, len, lock);

		if (ret)

			goto err;

	} else if (reg >= 0x5100 && reg < 0x8fff) {

		/* Firmware download */

		cmd = 1 << 7|1 << 6|(len - 1) << 2|1 << 1|1 << 0;

		ret = af9013_wregs(client, cmd, reg, val, len);

		ret = af9013_wregs(client, cmd, reg, val, len, lock);

		if (ret)

			goto err;

	} else {

		cmd = 0 << 7|0 << 6|(1 - 1) << 2|1 << 1|1 << 0;

		for (i = 0; i < len; i++) {

			ret = af9013_wregs(client, cmd, reg + i, val + i, 1);

			ret = af9013_wregs(client, cmd, reg + i, val + i, 1,

					   lock);

			if (ret)

				goto err;

		}
@@ -1374,19 +1443,21 @@ static int af9013_regmap_read(void *context, const void *reg_buf, 
	struct af9013_state *state = i2c_get_clientdata(client);

	int ret, i;

	u8 cmd;

	u16 reg = ((u8 *)reg_buf)[0] << 8|((u8 *)reg_buf)[1] << 0;

	u8 lock = !((u8 *)reg_buf)[0];

	u16 reg = ((u8 *)reg_buf)[1] << 8 | ((u8 *)reg_buf)[2] << 0;

	u8 *val = &((u8 *)val_buf)[0];

	const unsigned int len = val_size;



	if (state->ts_mode == AF9013_TS_MODE_USB && (reg & 0xff00) != 0xae00) {

		cmd = 0 << 7|0 << 6|(len - 1) << 2|1 << 1|0 << 0;

		ret = af9013_rregs(client, cmd, reg, val_buf, len);

		ret = af9013_rregs(client, cmd, reg, val_buf, len, lock);

		if (ret)

			goto err;

	} else {

		cmd = 0 << 7|0 << 6|(1 - 1) << 2|1 << 1|0 << 0;

		for (i = 0; i < len; i++) {

			ret = af9013_rregs(client, cmd, reg + i, val + i, 1);

			ret = af9013_rregs(client, cmd, reg + i, val + i, 1,

					   lock);

			if (ret)

				goto err;

		}
@@ -1411,7 +1482,8 @@ static int af9013_probe(struct i2c_client *client, 
		.write = af9013_regmap_write,

	};

	static const struct regmap_config regmap_config = {

		.reg_bits    =  16,

		/* Actual reg is 16 bits, see i2c adapter lock */

		.reg_bits = 24,

		.val_bits = 8,

	};
@@ -1421,6 +1493,8 @@ static int af9013_probe(struct i2c_client *client, 
		goto err;

	}



	dev_dbg(&client->dev, "\n");



	/* Setup the state */

	state->client = client;

	i2c_set_clientdata(client, state);
@@ -1438,25 +1512,36 @@ static int af9013_probe(struct i2c_client *client, 
		ret = PTR_ERR(state->regmap);

		goto err_kfree;

	}

	/* Create mux i2c adapter */

	state->muxc = i2c_mux_alloc(client->adapter, &client->dev, 1, 0, 0,

				    af9013_select, af9013_deselect);

	if (!state->muxc) {

		ret = -ENOMEM;

		goto err_regmap_exit;

	}

	state->muxc->priv = state;

	ret = i2c_mux_add_adapter(state->muxc, 0, 0, 0);

	if (ret)

		goto err_regmap_exit;



	/* Download firmware */

	if (state->ts_mode != AF9013_TS_MODE_USB) {

		ret = af9013_download_firmware(state);

		if (ret)

			goto err_regmap_exit;

			goto err_i2c_mux_del_adapters;

	}



	/* Firmware version */

	ret = regmap_bulk_read(state->regmap, 0x5103, firmware_version,

			       sizeof(firmware_version));

	if (ret)

		goto err_regmap_exit;

		goto err_i2c_mux_del_adapters;



	/* Set GPIOs */

	for (i = 0; i < sizeof(state->gpio); i++) {

		ret = af9013_set_gpio(state, i, state->gpio[i]);

		if (ret)

			goto err_regmap_exit;

			goto err_i2c_mux_del_adapters;

	}



	/* Create dvb frontend */
@@ -1467,6 +1552,7 @@ static int af9013_probe(struct i2c_client *client, 


	/* Setup callbacks */

	pdata->get_dvb_frontend = af9013_get_dvb_frontend;

	pdata->get_i2c_adapter = af9013_get_i2c_adapter;



	/* Init stats to indicate which stats are supported */

	c = &state->fe.dtv_property_cache;
@@ -1482,6 +1568,8 @@ static int af9013_probe(struct i2c_client *client, 
		 firmware_version[0], firmware_version[1],

		 firmware_version[2], firmware_version[3]);

	return 0;

err_i2c_mux_del_adapters:

	i2c_mux_del_adapters(state->muxc);

err_regmap_exit:

	regmap_exit(state->regmap);

err_kfree:
@@ -1497,6 +1585,8 @@ static int af9013_remove(struct i2c_client *client) 


	dev_dbg(&client->dev, "\n");



	i2c_mux_del_adapters(state->muxc);



	regmap_exit(state->regmap);



	kfree(state);

drivers/media/dvb-frontends/af9013.h

+1 −0
Original line number Diff line number Diff line
@@ -84,6 +84,7 @@ struct af9013_platform_data { 
	u8 gpio[4];



	struct dvb_frontend* (*get_dvb_frontend)(struct i2c_client *);

	struct i2c_adapter* (*get_i2c_adapter)(struct i2c_client *);



/* private: For legacy media attach wrapper. Do not set value. */

	bool attach_in_use;

drivers/media/dvb-frontends/af9013_priv.h

+1 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ 
#include <media/dvb_math.h>

#include "af9013.h"

#include <linux/firmware.h>

#include <linux/i2c-mux.h>

#include <linux/math64.h>

#include <linux/regmap.h>