@@ -40,6 +40,8 @@
*/
struct si2165_state {
+ struct i2c_client *client;
+
struct i2c_adapter *i2c;
struct dvb_frontend fe;
@@ -1157,6 +1159,153 @@ error:
}
EXPORT_SYMBOL(si2165_attach);
+static int si2165_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct si2165_state *state = NULL;
+ struct si2165_platform_data *pdata = client->dev.platform_data;
+ int n;
+ int ret = 0;
+ u8 val;
+ char rev_char;
+ const char *chip_name;
+
+ /* allocate memory for the internal state */
+ state = kzalloc(sizeof(struct si2165_state), GFP_KERNEL);
+ if (state == NULL) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ /* setup the state */
+ state->client = client;
+ state->i2c = client->adapter;
+ state->config.i2c_addr = client->addr;
+ state->config.chip_mode = pdata->chip_mode;
+ state->config.ref_freq_Hz = pdata->ref_freq_Hz;
+ state->config.inversion = pdata->inversion;
+
+ if (state->config.ref_freq_Hz < 4000000
+ || state->config.ref_freq_Hz > 27000000) {
+ dev_err(&state->i2c->dev, "%s: ref_freq of %d Hz not supported by this driver\n",
+ KBUILD_MODNAME, state->config.ref_freq_Hz);
+ ret = -EINVAL;
+ goto error;
+ }
+
+ /* create dvb_frontend */
+ memcpy(&state->fe.ops, &si2165_ops,
+ sizeof(struct dvb_frontend_ops));
+ state->fe.ops.release = NULL;
+ state->fe.demodulator_priv = state;
+ i2c_set_clientdata(client, state);
+
+ /* powerup */
+ ret = si2165_writereg8(state, 0x0000, state->config.chip_mode);
+ if (ret < 0)
+ goto nodev_error;
+
+ ret = si2165_readreg8(state, 0x0000, &val);
+ if (ret < 0)
+ goto nodev_error;
+ if (val != state->config.chip_mode)
+ goto nodev_error;
+
+ ret = si2165_readreg8(state, 0x0023, &state->chip_revcode);
+ if (ret < 0)
+ goto nodev_error;
+
+ ret = si2165_readreg8(state, 0x0118, &state->chip_type);
+ if (ret < 0)
+ goto nodev_error;
+
+ /* powerdown */
+ ret = si2165_writereg8(state, 0x0000, SI2165_MODE_OFF);
+ if (ret < 0)
+ goto nodev_error;
+
+ if (state->chip_revcode < 26)
+ rev_char = 'A' + state->chip_revcode;
+ else
+ rev_char = '?';
+
+ switch (state->chip_type) {
+ case 0x06:
+ chip_name = "Si2161";
+ state->has_dvbt = true;
+ break;
+ case 0x07:
+ chip_name = "Si2165";
+ state->has_dvbt = true;
+ state->has_dvbc = true;
+ break;
+ default:
+ dev_err(&state->i2c->dev, "%s: Unsupported Silicon Labs chip (type %d, rev %d)\n",
+ KBUILD_MODNAME, state->chip_type, state->chip_revcode);
+ goto nodev_error;
+ }
+
+ dev_info(&state->i2c->dev,
+ "%s: Detected Silicon Labs %s-%c (type %d, rev %d)\n",
+ KBUILD_MODNAME, chip_name, rev_char, state->chip_type,
+ state->chip_revcode);
+
+ strlcat(state->fe.ops.info.name, chip_name,
+ sizeof(state->fe.ops.info.name));
+
+ n = 0;
+ if (state->has_dvbt) {
+ state->fe.ops.delsys[n++] = SYS_DVBT;
+ strlcat(state->fe.ops.info.name, " DVB-T",
+ sizeof(state->fe.ops.info.name));
+ }
+ if (state->has_dvbc) {
+ state->fe.ops.delsys[n++] = SYS_DVBC_ANNEX_A;
+ strlcat(state->fe.ops.info.name, " DVB-C",
+ sizeof(state->fe.ops.info.name));
+ }
+
+ /* return fe pointer */
+ *pdata->fe = &state->fe;
+
+ return 0;
+
+nodev_error:
+ ret = -ENODEV;
+error:
+ kfree(state);
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static int si2165_remove(struct i2c_client *client)
+{
+ struct si2165_state *state = i2c_get_clientdata(client);
+
+ dev_dbg(&client->dev, "\n");
+
+ kfree(state);
+ return 0;
+}
+
+static const struct i2c_device_id si2165_id_table[] = {
+ {"si2165", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, si2165_id_table);
+
+static struct i2c_driver si2165_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "si2165",
+ },
+ .probe = si2165_probe,
+ .remove = si2165_remove,
+ .id_table = si2165_id_table,
+};
+
+module_i2c_driver(si2165_driver);
+
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
@@ -28,6 +28,28 @@ enum {
SI2165_MODE_PLL_XTAL = 0x21
};
+/* I2C addresses
+ * possible values: 0x64,0x65,0x66,0x67
+ */
+struct si2165_platform_data {
+ /*
+ * frontend
+ * returned by driver
+ */
+ struct dvb_frontend **fe;
+
+ /* external clock or XTAL */
+ u8 chip_mode;
+
+ /* frequency of external clock or xtal in Hz
+ * possible values: 4000000, 16000000, 20000000, 240000000, 27000000
+ */
+ u32 ref_freq_Hz;
+
+ /* invert the spectrum */
+ bool inversion;
+};
+
struct si2165_config {
/* i2c addr
* possible values: 0x64,0x65,0x66,0x67 */
Afterwards it is possible to convert attaching in card drivers. Signed-off-by: Matthias Schwarzott <zzam@gentoo.org> --- drivers/media/dvb-frontends/si2165.c | 149 +++++++++++++++++++++++++++++++++++ drivers/media/dvb-frontends/si2165.h | 22 ++++++ 2 files changed, 171 insertions(+)