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path: root/drivers/media/tuners/tda18212.c
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Diffstat (limited to 'drivers/media/tuners/tda18212.c')
-rw-r--r--drivers/media/tuners/tda18212.c276
1 files changed, 276 insertions, 0 deletions
diff --git a/drivers/media/tuners/tda18212.c b/drivers/media/tuners/tda18212.c
new file mode 100644
index 000000000..eb97711c9
--- /dev/null
+++ b/drivers/media/tuners/tda18212.c
@@ -0,0 +1,276 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * NXP TDA18212HN silicon tuner driver
+ *
+ * Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
+ */
+
+#include "tda18212.h"
+#include <linux/regmap.h>
+
+struct tda18212_dev {
+ struct tda18212_config cfg;
+ struct i2c_client *client;
+ struct regmap *regmap;
+
+ u32 if_frequency;
+};
+
+static int tda18212_set_params(struct dvb_frontend *fe)
+{
+ struct tda18212_dev *dev = fe->tuner_priv;
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ int ret, i;
+ u32 if_khz;
+ u8 buf[9];
+ #define DVBT_6 0
+ #define DVBT_7 1
+ #define DVBT_8 2
+ #define DVBT2_6 3
+ #define DVBT2_7 4
+ #define DVBT2_8 5
+ #define DVBC_6 6
+ #define DVBC_8 7
+ #define ATSC_VSB 8
+ #define ATSC_QAM 9
+ static const u8 bw_params[][3] = {
+ /* reg: 0f 13 23 */
+ [DVBT_6] = { 0xb3, 0x20, 0x03 },
+ [DVBT_7] = { 0xb3, 0x31, 0x01 },
+ [DVBT_8] = { 0xb3, 0x22, 0x01 },
+ [DVBT2_6] = { 0xbc, 0x20, 0x03 },
+ [DVBT2_7] = { 0xbc, 0x72, 0x03 },
+ [DVBT2_8] = { 0xbc, 0x22, 0x01 },
+ [DVBC_6] = { 0x92, 0x50, 0x03 },
+ [DVBC_8] = { 0x92, 0x53, 0x03 },
+ [ATSC_VSB] = { 0x7d, 0x20, 0x63 },
+ [ATSC_QAM] = { 0x7d, 0x20, 0x63 },
+ };
+
+ dev_dbg(&dev->client->dev,
+ "delivery_system=%d frequency=%d bandwidth_hz=%d\n",
+ c->delivery_system, c->frequency,
+ c->bandwidth_hz);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
+
+ switch (c->delivery_system) {
+ case SYS_ATSC:
+ if_khz = dev->cfg.if_atsc_vsb;
+ i = ATSC_VSB;
+ break;
+ case SYS_DVBC_ANNEX_B:
+ if_khz = dev->cfg.if_atsc_qam;
+ i = ATSC_QAM;
+ break;
+ case SYS_DVBT:
+ switch (c->bandwidth_hz) {
+ case 6000000:
+ if_khz = dev->cfg.if_dvbt_6;
+ i = DVBT_6;
+ break;
+ case 7000000:
+ if_khz = dev->cfg.if_dvbt_7;
+ i = DVBT_7;
+ break;
+ case 8000000:
+ if_khz = dev->cfg.if_dvbt_8;
+ i = DVBT_8;
+ break;
+ default:
+ ret = -EINVAL;
+ goto error;
+ }
+ break;
+ case SYS_DVBT2:
+ switch (c->bandwidth_hz) {
+ case 6000000:
+ if_khz = dev->cfg.if_dvbt2_6;
+ i = DVBT2_6;
+ break;
+ case 7000000:
+ if_khz = dev->cfg.if_dvbt2_7;
+ i = DVBT2_7;
+ break;
+ case 8000000:
+ if_khz = dev->cfg.if_dvbt2_8;
+ i = DVBT2_8;
+ break;
+ default:
+ ret = -EINVAL;
+ goto error;
+ }
+ break;
+ case SYS_DVBC_ANNEX_A:
+ case SYS_DVBC_ANNEX_C:
+ if_khz = dev->cfg.if_dvbc;
+ i = DVBC_8;
+ break;
+ default:
+ ret = -EINVAL;
+ goto error;
+ }
+
+ ret = regmap_write(dev->regmap, 0x23, bw_params[i][2]);
+ if (ret)
+ goto error;
+
+ ret = regmap_write(dev->regmap, 0x06, 0x00);
+ if (ret)
+ goto error;
+
+ ret = regmap_write(dev->regmap, 0x0f, bw_params[i][0]);
+ if (ret)
+ goto error;
+
+ buf[0] = 0x02;
+ buf[1] = bw_params[i][1];
+ buf[2] = 0x03; /* default value */
+ buf[3] = DIV_ROUND_CLOSEST(if_khz, 50);
+ buf[4] = ((c->frequency / 1000) >> 16) & 0xff;
+ buf[5] = ((c->frequency / 1000) >> 8) & 0xff;
+ buf[6] = ((c->frequency / 1000) >> 0) & 0xff;
+ buf[7] = 0xc1;
+ buf[8] = 0x01;
+ ret = regmap_bulk_write(dev->regmap, 0x12, buf, sizeof(buf));
+ if (ret)
+ goto error;
+
+ /* actual IF rounded as it is on register */
+ dev->if_frequency = buf[3] * 50 * 1000;
+
+exit:
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+
+ return ret;
+
+error:
+ dev_dbg(&dev->client->dev, "failed=%d\n", ret);
+ goto exit;
+}
+
+static int tda18212_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+ struct tda18212_dev *dev = fe->tuner_priv;
+
+ *frequency = dev->if_frequency;
+
+ return 0;
+}
+
+static const struct dvb_tuner_ops tda18212_tuner_ops = {
+ .info = {
+ .name = "NXP TDA18212",
+
+ .frequency_min_hz = 48 * MHz,
+ .frequency_max_hz = 864 * MHz,
+ .frequency_step_hz = 1 * kHz,
+ },
+
+ .set_params = tda18212_set_params,
+ .get_if_frequency = tda18212_get_if_frequency,
+};
+
+static int tda18212_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct tda18212_config *cfg = client->dev.platform_data;
+ struct dvb_frontend *fe = cfg->fe;
+ struct tda18212_dev *dev;
+ int ret;
+ unsigned int chip_id;
+ char *version;
+ static const struct regmap_config regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ };
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (dev == NULL) {
+ ret = -ENOMEM;
+ dev_err(&client->dev, "kzalloc() failed\n");
+ goto err;
+ }
+
+ memcpy(&dev->cfg, cfg, sizeof(struct tda18212_config));
+ dev->client = client;
+ dev->regmap = devm_regmap_init_i2c(client, &regmap_config);
+ if (IS_ERR(dev->regmap)) {
+ ret = PTR_ERR(dev->regmap);
+ goto err;
+ }
+
+ /* check if the tuner is there */
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
+
+ ret = regmap_read(dev->regmap, 0x00, &chip_id);
+ dev_dbg(&dev->client->dev, "chip_id=%02x\n", chip_id);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+
+ if (ret)
+ goto err;
+
+ switch (chip_id) {
+ case 0xc7:
+ version = "M"; /* master */
+ break;
+ case 0x47:
+ version = "S"; /* slave */
+ break;
+ default:
+ ret = -ENODEV;
+ goto err;
+ }
+
+ dev_info(&dev->client->dev,
+ "NXP TDA18212HN/%s successfully identified\n", version);
+
+ fe->tuner_priv = dev;
+ memcpy(&fe->ops.tuner_ops, &tda18212_tuner_ops,
+ sizeof(struct dvb_tuner_ops));
+ i2c_set_clientdata(client, dev);
+
+ return 0;
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ kfree(dev);
+ return ret;
+}
+
+static void tda18212_remove(struct i2c_client *client)
+{
+ struct tda18212_dev *dev = i2c_get_clientdata(client);
+ struct dvb_frontend *fe = dev->cfg.fe;
+
+ dev_dbg(&client->dev, "\n");
+
+ memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
+ fe->tuner_priv = NULL;
+ kfree(dev);
+}
+
+static const struct i2c_device_id tda18212_id[] = {
+ {"tda18212", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, tda18212_id);
+
+static struct i2c_driver tda18212_driver = {
+ .driver = {
+ .name = "tda18212",
+ },
+ .probe = tda18212_probe,
+ .remove = tda18212_remove,
+ .id_table = tda18212_id,
+};
+
+module_i2c_driver(tda18212_driver);
+
+MODULE_DESCRIPTION("NXP TDA18212HN silicon tuner driver");
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 08:04:50 +0000