[media] si2157: Silicon Labs Si2157 silicon tuner driver (930a8730) · Commits · e / devices / android_kernel_teracube_emerald

drivers/media/tuners/Kconfig

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Original line number	Diff line number	Diff line
		@@ -230,6 +230,13 @@ config MEDIA_TUNER_TUA9001
		help
		Infineon TUA 9001 silicon tuner driver.

		config MEDIA_TUNER_SI2157
		tristate "Silicon Labs Si2157 silicon tuner"
		depends on MEDIA_SUPPORT && I2C
		default m if !MEDIA_SUBDRV_AUTOSELECT
		help
		Silicon Labs Si2157 silicon tuner driver.

		config MEDIA_TUNER_IT913X
		tristate "ITE Tech IT913x silicon tuner"
		depends on MEDIA_SUPPORT && I2C

drivers/media/tuners/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -31,6 +31,7 @@ obj-$(CONFIG_MEDIA_TUNER_TDA18212) += tda18212.o
		obj-$(CONFIG_MEDIA_TUNER_E4000) += e4000.o
		obj-$(CONFIG_MEDIA_TUNER_FC2580) += fc2580.o
		obj-$(CONFIG_MEDIA_TUNER_TUA9001) += tua9001.o
		obj-$(CONFIG_MEDIA_TUNER_SI2157) += si2157.o
		obj-$(CONFIG_MEDIA_TUNER_M88TS2022) += m88ts2022.o
		obj-$(CONFIG_MEDIA_TUNER_FC0011) += fc0011.o
		obj-$(CONFIG_MEDIA_TUNER_FC0012) += fc0012.o

drivers/media/tuners/si2157.c

0 → 100644

+244 −0

Original line number	Diff line number	Diff line
		#include "si2157_priv.h"

		/* execute firmware command */
		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) {
		/* write cmd and args for firmware */
		ret = i2c_master_send(s->client, cmd->args, cmd->len);
		if (ret < 0) {
		goto err_mutex_unlock;
		} else if (ret != cmd->len) {
		ret = -EREMOTEIO;
		goto err_mutex_unlock;
		}
		}

		/* 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);
		if (ret < 0) {
		goto err_mutex_unlock;
		} else if (ret != 1) {
		ret = -EREMOTEIO;
		goto err_mutex_unlock;
		}

		/* firmware ready? */
		if ((buf[0] >> 7) & 0x01)
		break;
		}

		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) {
		ret = -ETIMEDOUT;
		goto err_mutex_unlock;
		} else {
		ret = 0;
		}

		err_mutex_unlock:
		mutex_unlock(&s->i2c_mutex);
		if (ret)
		goto err;

		return 0;
		err:
		dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);
		return ret;
		}

		static int si2157_init(struct dvb_frontend *fe)
		{
		struct si2157 *s = fe->tuner_priv;

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

		s->active = true;

		return 0;
		}

		static int si2157_sleep(struct dvb_frontend *fe)
		{
		struct si2157 *s = fe->tuner_priv;

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

		s->active = false;

		return 0;
		}

		static int si2157_set_params(struct dvb_frontend *fe)
		{
		struct si2157 *s = fe->tuner_priv;
		struct dtv_frontend_properties *c = &fe->dtv_property_cache;
		int ret;
		struct si2157_cmd cmd;

		dev_dbg(&s->client->dev,
		"%s: delivery_system=%d frequency=%u bandwidth_hz=%u\n",
		__func__, c->delivery_system, c->frequency,
		c->bandwidth_hz);

		if (!s->active) {
		ret = -EAGAIN;
		goto err;
		}

		/* configure? */
		cmd.args[0] = 0xc0;
		cmd.args[1] = 0x00;
		cmd.args[2] = 0x0c;
		cmd.args[3] = 0x00;
		cmd.args[4] = 0x00;
		cmd.args[5] = 0x01;
		cmd.args[6] = 0x01;
		cmd.args[7] = 0x01;
		cmd.args[8] = 0x01;
		cmd.args[9] = 0x01;
		cmd.args[10] = 0x01;
		cmd.args[11] = 0x02;
		cmd.args[12] = 0x00;
		cmd.args[13] = 0x00;
		cmd.args[14] = 0x01;
		cmd.len = 15;
		ret = si2157_cmd_execute(s, &cmd);
		if (ret)
		goto err;

		cmd.args[0] = 0x02;
		cmd.len = 1;
		ret = si2157_cmd_execute(s, &cmd);
		if (ret)
		goto err;

		cmd.args[0] = 0x01;
		cmd.args[1] = 0x01;
		cmd.len = 2;
		ret = si2157_cmd_execute(s, &cmd);
		if (ret)
		goto err;

		/* set frequency */
		cmd.args[0] = 0x41;
		cmd.args[1] = 0x00;
		cmd.args[2] = 0x00;
		cmd.args[3] = 0x00;
		cmd.args[4] = (c->frequency >> 0) & 0xff;
		cmd.args[5] = (c->frequency >> 8) & 0xff;
		cmd.args[6] = (c->frequency >> 16) & 0xff;
		cmd.args[7] = (c->frequency >> 24) & 0xff;
		cmd.len = 8;
		ret = si2157_cmd_execute(s, &cmd);
		if (ret)
		goto err;

		return 0;
		err:
		dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);
		return ret;
		}

		static const struct dvb_tuner_ops si2157_tuner_ops = {
		.info = {
		.name = "Silicon Labs Si2157",
		.frequency_min = 174000000,
		.frequency_max = 862000000,
		},

		.init = si2157_init,
		.sleep = si2157_sleep,
		.set_params = si2157_set_params,
		};

		static int si2157_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
		{
		struct si2157_config *cfg = client->dev.platform_data;
		struct dvb_frontend *fe = cfg->fe;
		struct si2157 *s;
		struct si2157_cmd cmd;
		int ret;

		s = kzalloc(sizeof(struct si2157), GFP_KERNEL);
		if (!s) {
		ret = -ENOMEM;
		dev_err(&client->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
		goto err;
		}

		s->client = client;
		s->fe = cfg->fe;
		mutex_init(&s->i2c_mutex);

		/* check if the tuner is there */
		cmd.len = 0;
		ret = si2157_cmd_execute(s, &cmd);
		if (ret)
		goto err;

		fe->tuner_priv = s;
		memcpy(&fe->ops.tuner_ops, &si2157_tuner_ops,
		sizeof(struct dvb_tuner_ops));

		i2c_set_clientdata(client, s);

		dev_info(&s->client->dev,
		"%s: Silicon Labs Si2157 successfully attached\n",
		KBUILD_MODNAME);
		return 0;
		err:
		dev_dbg(&client->dev, "%s: failed=%d\n", __func__, ret);
		kfree(s);

		return ret;
		}

		static int si2157_remove(struct i2c_client *client)
		{
		struct si2157 *s = i2c_get_clientdata(client);
		struct dvb_frontend *fe = s->fe;

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

		memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
		fe->tuner_priv = NULL;
		kfree(s);

		return 0;
		}

		static const struct i2c_device_id si2157_id[] = {
		{"si2157", 0},
		{}
		};
		MODULE_DEVICE_TABLE(i2c, si2157_id);

		static struct i2c_driver si2157_driver = {
		.driver = {
		.owner = THIS_MODULE,
		.name = "si2157",
		},
		.probe = si2157_probe,
		.remove = si2157_remove,
		.id_table = si2157_id,
		};

		module_i2c_driver(si2157_driver);

		MODULE_DESCRIPTION("Silicon Labs Si2157 silicon tuner driver");
		MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
		MODULE_LICENSE("GPL");

drivers/media/tuners/si2157.h

0 → 100644

+18 −0

Original line number	Diff line number	Diff line
		#ifndef SI2157_H
		#define SI2157_H

		#include <linux/kconfig.h>
		#include "dvb_frontend.h"

		/*
		* I2C address
		* 0x60
		*/
		struct si2157_config {
		/*
		* frontend
		*/
		struct dvb_frontend *fe;
		};

		#endif

drivers/media/tuners/si2157_priv.h

0 → 100644

+21 −0

Original line number	Diff line number	Diff line
		#ifndef SI2157_PRIV_H
		#define SI2157_PRIV_H

		#include "si2157.h"

		/* state struct */
		struct si2157 {
		struct mutex i2c_mutex;
		struct i2c_client *client;
		struct dvb_frontend *fe;
		bool active;
		};

		/* firmare command struct */
		#define SI2157_ARGLEN 30
		struct si2157_cmd {
		u8 args[SI2157_ARGLEN];
		unsigned len;
		};

		#endif