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authorAntti Palosaari <crope@iki.fi>2014-04-10 21:58:10 -0300
committerMauro Carvalho Chehab <m.chehab@samsung.com>2014-04-23 09:47:33 -0300
commit930a873081986393f6e7e0fb9275753c1485277b (patch)
treefd40f7facb9fe2448f8dfe4220cdafe6d62aae8c
parent701b57ee3387b8e3749845b02310b5625fbd8da0 (diff)
[media] si2157: Silicon Labs Si2157 silicon tuner driver
Silicon Labs Si2157 silicon tuner driver. Currently it supports only DVB-T. Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
-rw-r--r--drivers/media/tuners/Kconfig7
-rw-r--r--drivers/media/tuners/Makefile1
-rw-r--r--drivers/media/tuners/si2157.c244
-rw-r--r--drivers/media/tuners/si2157.h18
-rw-r--r--drivers/media/tuners/si2157_priv.h21
5 files changed, 291 insertions, 0 deletions
diff --git a/drivers/media/tuners/Kconfig b/drivers/media/tuners/Kconfig
index a1284889cd15..22b6b8bb1d93 100644
--- a/drivers/media/tuners/Kconfig
+++ b/drivers/media/tuners/Kconfig
@@ -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
diff --git a/drivers/media/tuners/Makefile b/drivers/media/tuners/Makefile
index efe82a904b12..a6ff0c628dfa 100644
--- a/drivers/media/tuners/Makefile
+++ b/drivers/media/tuners/Makefile
@@ -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
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c
new file mode 100644
index 000000000000..953f2e3f1489
--- /dev/null
+++ b/drivers/media/tuners/si2157.c
@@ -0,0 +1,244 @@
+#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");
diff --git a/drivers/media/tuners/si2157.h b/drivers/media/tuners/si2157.h
new file mode 100644
index 000000000000..5de47d4bef9a
--- /dev/null
+++ b/drivers/media/tuners/si2157.h
@@ -0,0 +1,18 @@
+#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
diff --git a/drivers/media/tuners/si2157_priv.h b/drivers/media/tuners/si2157_priv.h
new file mode 100644
index 000000000000..6018851bdabd
--- /dev/null
+++ b/drivers/media/tuners/si2157_priv.h
@@ -0,0 +1,21 @@
+#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

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