diff options
| -rw-r--r-- | drivers/media/dvb-frontends/rtl2832.c | 108 | ||||
| -rw-r--r-- | drivers/media/dvb-frontends/rtl2832.h | 10 | ||||
| -rw-r--r-- | drivers/media/dvb-frontends/rtl2832_priv.h | 1 |
3 files changed, 119 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/rtl2832.c b/drivers/media/dvb-frontends/rtl2832.c index 9026e1aee163..53b446afe030 100644 --- a/drivers/media/dvb-frontends/rtl2832.c +++ b/drivers/media/dvb-frontends/rtl2832.c @@ -1183,6 +1183,114 @@ static struct dvb_frontend_ops rtl2832_ops = { .i2c_gate_ctrl = rtl2832_i2c_gate_ctrl, }; +static int rtl2832_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct rtl2832_platform_data *pdata = client->dev.platform_data; + const struct rtl2832_config *config = pdata->config; + struct i2c_adapter *i2c = client->adapter; + struct rtl2832_priv *priv; + int ret; + u8 tmp; + + dev_dbg(&client->dev, "\n"); + + /* Caller really need to provide pointer for frontend we create. */ + if (pdata->dvb_frontend == NULL) { + dev_err(&client->dev, "frontend pointer not defined\n"); + ret = -EINVAL; + goto err; + } + + /* allocate memory for the internal state */ + priv = kzalloc(sizeof(struct rtl2832_priv), GFP_KERNEL); + if (priv == NULL) { + ret = -ENOMEM; + goto err; + } + + /* setup the priv */ + priv->client = client; + priv->i2c = i2c; + priv->tuner = config->tuner; + priv->sleeping = true; + memcpy(&priv->cfg, config, sizeof(struct rtl2832_config)); + INIT_DELAYED_WORK(&priv->i2c_gate_work, rtl2832_i2c_gate_work); + + /* create muxed i2c adapter for demod itself */ + priv->i2c_adapter = i2c_add_mux_adapter(i2c, &i2c->dev, priv, 0, 0, 0, + rtl2832_select, NULL); + if (priv->i2c_adapter == NULL) { + ret = -ENODEV; + goto err_kfree; + } + + /* check if the demod is there */ + ret = rtl2832_rd_reg(priv, 0x00, 0x0, &tmp); + if (ret) + goto err_i2c_del_mux_adapter; + + /* create muxed i2c adapter for demod tuner bus */ + priv->i2c_adapter_tuner = i2c_add_mux_adapter(i2c, &i2c->dev, priv, + 0, 1, 0, rtl2832_select, rtl2832_deselect); + if (priv->i2c_adapter_tuner == NULL) { + ret = -ENODEV; + goto err_i2c_del_mux_adapter; + } + + /* create dvb_frontend */ + memcpy(&priv->fe.ops, &rtl2832_ops, sizeof(struct dvb_frontend_ops)); + priv->fe.ops.release = NULL; + priv->fe.demodulator_priv = priv; + i2c_set_clientdata(client, priv); + *pdata->dvb_frontend = &priv->fe; + + dev_info(&client->dev, "Realtek RTL2832 successfully attached\n"); + return 0; +err_i2c_del_mux_adapter: + i2c_del_mux_adapter(priv->i2c_adapter); +err_kfree: + kfree(priv); +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int rtl2832_remove(struct i2c_client *client) +{ + struct rtl2832_priv *priv = i2c_get_clientdata(client); + + dev_dbg(&client->dev, "\n"); + + cancel_delayed_work_sync(&priv->i2c_gate_work); + + i2c_del_mux_adapter(priv->i2c_adapter_tuner); + + i2c_del_mux_adapter(priv->i2c_adapter); + + kfree(priv); + + return 0; +} + +static const struct i2c_device_id rtl2832_id_table[] = { + {"rtl2832", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, rtl2832_id_table); + +static struct i2c_driver rtl2832_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "rtl2832", + }, + .probe = rtl2832_probe, + .remove = rtl2832_remove, + .id_table = rtl2832_id_table, +}; + +module_i2c_driver(rtl2832_driver); + MODULE_AUTHOR("Thomas Mair <mair.thomas86@gmail.com>"); MODULE_DESCRIPTION("Realtek RTL2832 DVB-T demodulator driver"); MODULE_LICENSE("GPL"); diff --git a/drivers/media/dvb-frontends/rtl2832.h b/drivers/media/dvb-frontends/rtl2832.h index 5254c1dfc8de..cfd69d8a9a81 100644 --- a/drivers/media/dvb-frontends/rtl2832.h +++ b/drivers/media/dvb-frontends/rtl2832.h @@ -50,6 +50,16 @@ struct rtl2832_config { u8 tuner; }; +struct rtl2832_platform_data { + const struct rtl2832_config *config; + + /* + * frontend + * returned by driver + */ + struct dvb_frontend **dvb_frontend; +}; + #if IS_ENABLED(CONFIG_DVB_RTL2832) struct dvb_frontend *rtl2832_attach( const struct rtl2832_config *cfg, diff --git a/drivers/media/dvb-frontends/rtl2832_priv.h b/drivers/media/dvb-frontends/rtl2832_priv.h index ae469f032fe6..05b2b62634c1 100644 --- a/drivers/media/dvb-frontends/rtl2832_priv.h +++ b/drivers/media/dvb-frontends/rtl2832_priv.h @@ -26,6 +26,7 @@ #include <linux/i2c-mux.h> struct rtl2832_priv { + struct i2c_client *client; struct i2c_adapter *i2c; struct i2c_adapter *i2c_adapter; struct i2c_adapter *i2c_adapter_tuner; |