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Commit e6b4380f authored by Antti Palosaari's avatar Antti Palosaari Committed by Mauro Carvalho Chehab
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[media] si2157: add read data support for fw cmd func 



We want also read data from firmware. Add support for it. Copied from
si2168 driver.

Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent 88ac8f86

drivers/media/tuners/si2157.c

+41 −33
Original line number Diff line number Diff line
@@ -20,49 +20,51 @@ 
static int si2157_cmd_execute(struct si2157 *s, struct si2157_cmd *cmd)

{

	int ret;

	u8 buf[1];

	unsigned long timeout;



	mutex_lock(&s->i2c_mutex);



	if (cmd->len) {

	if (cmd->wlen) {

		/* write cmd and args for firmware */

		ret = i2c_master_send(s->client, cmd->args, cmd->len);

		ret = i2c_master_send(s->client, cmd->args, cmd->wlen);

		if (ret < 0) {

			goto err_mutex_unlock;

		} else if (ret != cmd->len) {

		} else if (ret != cmd->wlen) {

			ret = -EREMOTEIO;

			goto err_mutex_unlock;

		}

	}



	if (cmd->rlen) {

		/* wait cmd execution terminate */

		#define TIMEOUT 80

		timeout = jiffies + msecs_to_jiffies(TIMEOUT);

		while (!time_after(jiffies, timeout)) {

		ret = i2c_master_recv(s->client, buf, 1);

			ret = i2c_master_recv(s->client, cmd->args, cmd->rlen);

			if (ret < 0) {

				goto err_mutex_unlock;

		} else if (ret != 1) {

			} else if (ret != cmd->rlen) {

				ret = -EREMOTEIO;

				goto err_mutex_unlock;

			}



			/* firmware ready? */

		if ((buf[0] >> 7) & 0x01)

			if ((cmd->args[0] >> 7) & 0x01)

				break;

		}



	dev_dbg(&s->client->dev, "%s: cmd execution took %d ms\n", __func__,

		dev_dbg(&s->client->dev, "%s: cmd execution took %d ms\n",

				__func__,

				jiffies_to_msecs(jiffies) -

				(jiffies_to_msecs(timeout) - TIMEOUT));



	if (!(buf[0] >> 7) & 0x01) {

		if (!((cmd->args[0] >> 7) & 0x01)) {

			ret = -ETIMEDOUT;

			goto err_mutex_unlock;

	} else {

		ret = 0;

		}

	}



	ret = 0;



err_mutex_unlock:

	mutex_unlock(&s->i2c_mutex);
@@ -97,7 +99,8 @@ static int si2157_sleep(struct dvb_frontend *fe) 
	s->active = false;



	memcpy(cmd.args, "\x13", 1);

	cmd.len = 1;

	cmd.wlen = 1;

	cmd.rlen = 0;

	ret = si2157_cmd_execute(s, &cmd);

	if (ret)

		goto err;
@@ -141,20 +144,23 @@ static int si2157_set_params(struct dvb_frontend *fe) 
	cmd.args[12] = 0x00;

	cmd.args[13] = 0x00;

	cmd.args[14] = 0x01;

	cmd.len = 15;

	cmd.wlen = 15;

	cmd.rlen = 1;

	ret = si2157_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	cmd.args[0] = 0x02;

	cmd.len = 1;

	cmd.wlen = 1;

	cmd.rlen = 13;

	ret = si2157_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	cmd.args[0] = 0x01;

	cmd.args[1] = 0x01;

	cmd.len = 2;

	cmd.wlen = 2;

	cmd.rlen = 1;

	ret = si2157_cmd_execute(s, &cmd);

	if (ret)

		goto err;
@@ -168,7 +174,8 @@ static int si2157_set_params(struct dvb_frontend *fe) 
	cmd.args[5] = (c->frequency >>  8) & 0xff;

	cmd.args[6] = (c->frequency >> 16) & 0xff;

	cmd.args[7] = (c->frequency >> 24) & 0xff;

	cmd.len = 8;

	cmd.wlen = 8;

	cmd.rlen = 1;

	ret = si2157_cmd_execute(s, &cmd);

	if (ret)

		goto err;
@@ -212,7 +219,8 @@ static int si2157_probe(struct i2c_client *client, 
	mutex_init(&s->i2c_mutex);



	/* check if the tuner is there */

	cmd.len = 0;

	cmd.wlen = 0;

	cmd.rlen = 1;

	ret = si2157_cmd_execute(s, &cmd);

	if (ret)

		goto err;

drivers/media/tuners/si2157_priv.h

+2 −1
Original line number Diff line number Diff line
@@ -31,7 +31,8 @@ struct si2157 { 
#define SI2157_ARGLEN      30

struct si2157_cmd {

	u8 args[SI2157_ARGLEN];

	unsigned len;

	unsigned wlen;

	unsigned rlen;

};



#endif