forked from luck/tmp_suning_uos_patched
[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>
This commit is contained in:
Antti Palosaari
Mauro Carvalho Chehab
parent
701b57ee33
commit
930a873081
@ -230,6 +230,13 @@ config MEDIA_TUNER_TUA9001
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help
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Infineon TUA 9001 silicon tuner driver.
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config MEDIA_TUNER_SI2157
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tristate "Silicon Labs Si2157 silicon tuner"
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depends on MEDIA_SUPPORT && I2C
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default m if !MEDIA_SUBDRV_AUTOSELECT
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help
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Silicon Labs Si2157 silicon tuner driver.
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config MEDIA_TUNER_IT913X
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tristate "ITE Tech IT913x silicon tuner"
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depends on MEDIA_SUPPORT && I2C
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@ -31,6 +31,7 @@ obj-$(CONFIG_MEDIA_TUNER_TDA18212) += tda18212.o
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obj-$(CONFIG_MEDIA_TUNER_E4000) += e4000.o
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obj-$(CONFIG_MEDIA_TUNER_FC2580) += fc2580.o
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obj-$(CONFIG_MEDIA_TUNER_TUA9001) += tua9001.o
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obj-$(CONFIG_MEDIA_TUNER_SI2157) += si2157.o
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obj-$(CONFIG_MEDIA_TUNER_M88TS2022) += m88ts2022.o
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obj-$(CONFIG_MEDIA_TUNER_FC0011) += fc0011.o
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obj-$(CONFIG_MEDIA_TUNER_FC0012) += fc0012.o
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244
drivers/media/tuners/si2157.c
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244
drivers/media/tuners/si2157.c
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@ -0,0 +1,244 @@
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#include "si2157_priv.h"
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/* execute firmware command */
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static int si2157_cmd_execute(struct si2157 *s, struct si2157_cmd *cmd)
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{
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int ret;
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u8 buf[1];
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unsigned long timeout;
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mutex_lock(&s->i2c_mutex);
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if (cmd->len) {
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/* write cmd and args for firmware */
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ret = i2c_master_send(s->client, cmd->args, cmd->len);
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if (ret < 0) {
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goto err_mutex_unlock;
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} else if (ret != cmd->len) {
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ret = -EREMOTEIO;
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goto err_mutex_unlock;
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}
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}
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/* wait cmd execution terminate */
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#define TIMEOUT 80
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timeout = jiffies + msecs_to_jiffies(TIMEOUT);
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while (!time_after(jiffies, timeout)) {
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ret = i2c_master_recv(s->client, buf, 1);
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if (ret < 0) {
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goto err_mutex_unlock;
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} else if (ret != 1) {
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ret = -EREMOTEIO;
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goto err_mutex_unlock;
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}
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/* firmware ready? */
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if ((buf[0] >> 7) & 0x01)
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break;
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}
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dev_dbg(&s->client->dev, "%s: cmd execution took %d ms\n", __func__,
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jiffies_to_msecs(jiffies) -
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(jiffies_to_msecs(timeout) - TIMEOUT));
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if (!(buf[0] >> 7) & 0x01) {
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ret = -ETIMEDOUT;
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goto err_mutex_unlock;
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} else {
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ret = 0;
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}
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err_mutex_unlock:
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mutex_unlock(&s->i2c_mutex);
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if (ret)
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goto err;
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return 0;
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err:
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dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);
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return ret;
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}
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static int si2157_init(struct dvb_frontend *fe)
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{
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struct si2157 *s = fe->tuner_priv;
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dev_dbg(&s->client->dev, "%s:\n", __func__);
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s->active = true;
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return 0;
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}
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static int si2157_sleep(struct dvb_frontend *fe)
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{
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struct si2157 *s = fe->tuner_priv;
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dev_dbg(&s->client->dev, "%s:\n", __func__);
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s->active = false;
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return 0;
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}
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static int si2157_set_params(struct dvb_frontend *fe)
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{
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struct si2157 *s = fe->tuner_priv;
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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int ret;
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struct si2157_cmd cmd;
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dev_dbg(&s->client->dev,
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"%s: delivery_system=%d frequency=%u bandwidth_hz=%u\n",
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__func__, c->delivery_system, c->frequency,
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c->bandwidth_hz);
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if (!s->active) {
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ret = -EAGAIN;
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goto err;
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}
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/* configure? */
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cmd.args[0] = 0xc0;
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cmd.args[1] = 0x00;
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cmd.args[2] = 0x0c;
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cmd.args[3] = 0x00;
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cmd.args[4] = 0x00;
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cmd.args[5] = 0x01;
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cmd.args[6] = 0x01;
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cmd.args[7] = 0x01;
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cmd.args[8] = 0x01;
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cmd.args[9] = 0x01;
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cmd.args[10] = 0x01;
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cmd.args[11] = 0x02;
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cmd.args[12] = 0x00;
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cmd.args[13] = 0x00;
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cmd.args[14] = 0x01;
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cmd.len = 15;
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ret = si2157_cmd_execute(s, &cmd);
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if (ret)
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goto err;
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cmd.args[0] = 0x02;
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cmd.len = 1;
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ret = si2157_cmd_execute(s, &cmd);
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if (ret)
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goto err;
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cmd.args[0] = 0x01;
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cmd.args[1] = 0x01;
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cmd.len = 2;
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ret = si2157_cmd_execute(s, &cmd);
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if (ret)
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goto err;
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/* set frequency */
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cmd.args[0] = 0x41;
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cmd.args[1] = 0x00;
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cmd.args[2] = 0x00;
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cmd.args[3] = 0x00;
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cmd.args[4] = (c->frequency >> 0) & 0xff;
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cmd.args[5] = (c->frequency >> 8) & 0xff;
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cmd.args[6] = (c->frequency >> 16) & 0xff;
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cmd.args[7] = (c->frequency >> 24) & 0xff;
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cmd.len = 8;
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ret = si2157_cmd_execute(s, &cmd);
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if (ret)
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goto err;
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return 0;
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err:
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dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);
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return ret;
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}
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static const struct dvb_tuner_ops si2157_tuner_ops = {
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.info = {
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.name = "Silicon Labs Si2157",
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.frequency_min = 174000000,
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.frequency_max = 862000000,
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},
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.init = si2157_init,
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.sleep = si2157_sleep,
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.set_params = si2157_set_params,
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};
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static int si2157_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct si2157_config *cfg = client->dev.platform_data;
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struct dvb_frontend *fe = cfg->fe;
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struct si2157 *s;
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struct si2157_cmd cmd;
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int ret;
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s = kzalloc(sizeof(struct si2157), GFP_KERNEL);
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if (!s) {
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ret = -ENOMEM;
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dev_err(&client->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
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goto err;
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}
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s->client = client;
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s->fe = cfg->fe;
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mutex_init(&s->i2c_mutex);
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/* check if the tuner is there */
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cmd.len = 0;
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ret = si2157_cmd_execute(s, &cmd);
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if (ret)
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goto err;
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fe->tuner_priv = s;
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memcpy(&fe->ops.tuner_ops, &si2157_tuner_ops,
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sizeof(struct dvb_tuner_ops));
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i2c_set_clientdata(client, s);
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dev_info(&s->client->dev,
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"%s: Silicon Labs Si2157 successfully attached\n",
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KBUILD_MODNAME);
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return 0;
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err:
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dev_dbg(&client->dev, "%s: failed=%d\n", __func__, ret);
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kfree(s);
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return ret;
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}
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static int si2157_remove(struct i2c_client *client)
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{
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struct si2157 *s = i2c_get_clientdata(client);
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struct dvb_frontend *fe = s->fe;
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dev_dbg(&client->dev, "%s:\n", __func__);
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memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
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fe->tuner_priv = NULL;
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kfree(s);
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return 0;
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}
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static const struct i2c_device_id si2157_id[] = {
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{"si2157", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, si2157_id);
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static struct i2c_driver si2157_driver = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "si2157",
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},
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.probe = si2157_probe,
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.remove = si2157_remove,
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.id_table = si2157_id,
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};
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module_i2c_driver(si2157_driver);
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MODULE_DESCRIPTION("Silicon Labs Si2157 silicon tuner driver");
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MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
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MODULE_LICENSE("GPL");
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18
drivers/media/tuners/si2157.h
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18
drivers/media/tuners/si2157.h
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@ -0,0 +1,18 @@
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#ifndef SI2157_H
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#define SI2157_H
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#include <linux/kconfig.h>
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#include "dvb_frontend.h"
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/*
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* I2C address
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* 0x60
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*/
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struct si2157_config {
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/*
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* frontend
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*/
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struct dvb_frontend *fe;
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};
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#endif
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21
drivers/media/tuners/si2157_priv.h
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21
drivers/media/tuners/si2157_priv.h
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@ -0,0 +1,21 @@
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#ifndef SI2157_PRIV_H
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#define SI2157_PRIV_H
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#include "si2157.h"
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/* state struct */
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struct si2157 {
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struct mutex i2c_mutex;
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struct i2c_client *client;
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struct dvb_frontend *fe;
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bool active;
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};
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/* firmare command struct */
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#define SI2157_ARGLEN 30
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struct si2157_cmd {
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u8 args[SI2157_ARGLEN];
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unsigned len;
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};
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#endif
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