[media] ts2020: implement I2C client bindings
Implement I2C binding model. Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Antti Palosaari
Mauro Carvalho Chehab
parent
abd9025b95
commit
dc245a5f9b
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@ -26,6 +26,7 @@
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#define FREQ_OFFSET_LOW_SYM_RATE 3000
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struct ts2020_priv {
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struct dvb_frontend *fe;
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/* i2c details */
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int i2c_address;
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struct i2c_adapter *i2c;
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@ -428,6 +429,7 @@ struct dvb_frontend *ts2020_attach(struct dvb_frontend *fe,
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priv->clk_out = config->clk_out;
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priv->clk_out_div = config->clk_out_div;
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priv->frequency_div = config->frequency_div;
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priv->fe = fe;
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fe->tuner_priv = priv;
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if (!priv->frequency_div)
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@ -463,6 +465,165 @@ struct dvb_frontend *ts2020_attach(struct dvb_frontend *fe,
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}
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EXPORT_SYMBOL(ts2020_attach);
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static int ts2020_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct ts2020_config *pdata = client->dev.platform_data;
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struct dvb_frontend *fe = pdata->fe;
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struct ts2020_priv *dev;
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int ret;
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u8 u8tmp;
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unsigned int utmp;
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char *chip_str;
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dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (!dev) {
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ret = -ENOMEM;
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goto err;
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}
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dev->i2c = client->adapter;
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dev->i2c_address = client->addr;
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dev->clk_out = pdata->clk_out;
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dev->clk_out_div = pdata->clk_out_div;
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dev->frequency_div = pdata->frequency_div;
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dev->fe = fe;
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fe->tuner_priv = dev;
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/* check if the tuner is there */
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ret = ts2020_readreg(fe, 0x00);
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if (ret < 0)
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goto err;
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utmp = ret;
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if ((utmp & 0x03) == 0x00) {
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ret = ts2020_writereg(fe, 0x00, 0x01);
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if (ret)
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goto err;
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usleep_range(2000, 50000);
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}
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ret = ts2020_writereg(fe, 0x00, 0x03);
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if (ret)
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goto err;
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usleep_range(2000, 50000);
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ret = ts2020_readreg(fe, 0x00);
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if (ret < 0)
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goto err;
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utmp = ret;
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dev_dbg(&client->dev, "chip_id=%02x\n", utmp);
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switch (utmp) {
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case 0x01:
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case 0x41:
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case 0x81:
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dev->tuner = TS2020_M88TS2020;
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chip_str = "TS2020";
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if (!dev->frequency_div)
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dev->frequency_div = 1060000;
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break;
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case 0xc3:
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case 0x83:
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dev->tuner = TS2020_M88TS2022;
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chip_str = "TS2022";
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if (!dev->frequency_div)
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dev->frequency_div = 1103000;
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break;
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default:
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ret = -ENODEV;
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goto err;
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}
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if (dev->tuner == TS2020_M88TS2022) {
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switch (dev->clk_out) {
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case TS2020_CLK_OUT_DISABLED:
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u8tmp = 0x60;
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break;
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case TS2020_CLK_OUT_ENABLED:
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u8tmp = 0x70;
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ret = ts2020_writereg(fe, 0x05, dev->clk_out_div);
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if (ret)
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goto err;
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break;
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case TS2020_CLK_OUT_ENABLED_XTALOUT:
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u8tmp = 0x6c;
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break;
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default:
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ret = -EINVAL;
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goto err;
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}
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ret = ts2020_writereg(fe, 0x42, u8tmp);
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if (ret)
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goto err;
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if (dev->loop_through)
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u8tmp = 0xec;
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else
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u8tmp = 0x6c;
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ret = ts2020_writereg(fe, 0x62, u8tmp);
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if (ret)
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goto err;
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}
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/* sleep */
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ret = ts2020_writereg(fe, 0x00, 0x00);
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if (ret)
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goto err;
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dev_info(&client->dev,
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"Montage Technology %s successfully identified\n", chip_str);
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memcpy(&fe->ops.tuner_ops, &ts2020_tuner_ops,
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sizeof(struct dvb_tuner_ops));
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fe->ops.tuner_ops.release = NULL;
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i2c_set_clientdata(client, dev);
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return 0;
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err:
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dev_dbg(&client->dev, "failed=%d\n", ret);
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kfree(dev);
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return ret;
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}
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static int ts2020_remove(struct i2c_client *client)
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{
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struct ts2020_priv *dev = i2c_get_clientdata(client);
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struct dvb_frontend *fe = dev->fe;
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dev_dbg(&client->dev, "\n");
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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(dev);
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return 0;
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}
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static const struct i2c_device_id ts2020_id_table[] = {
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{"ts2020", 0},
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{"ts2022", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, ts2020_id_table);
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static struct i2c_driver ts2020_driver = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "ts2020",
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},
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.probe = ts2020_probe,
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.remove = ts2020_remove,
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.id_table = ts2020_id_table,
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};
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module_i2c_driver(ts2020_driver);
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MODULE_AUTHOR("Konstantin Dimitrov <kosio.dimitrov@gmail.com>");
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MODULE_DESCRIPTION("Montage Technology TS2020 - Silicon tuner driver module");
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MODULE_LICENSE("GPL");
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