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![Uwe Kleine-König](/assets/img/avatar_default.png)
If disabling the hardware fails the driver propagates the error code to the i2c core. However this only results in a generic error message; the device still disappears. So instead emit a message that better describes the actual problem than the i2c core's "remove failed (ESOMETHING), will be ignored" and return 0 to suppress the generic message. Link: https://lore.kernel.org/linux-media/20211026194010.109029-1-u.kleine-koenig@pengutronix.de Cc: linux-media@vger.kernel.org, kernel@pengutronix.de Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
269 lines
5.5 KiB
C
269 lines
5.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Infineon TUA9001 silicon tuner driver
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*
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* Copyright (C) 2009 Antti Palosaari <crope@iki.fi>
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*/
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#include "tua9001_priv.h"
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static int tua9001_init(struct dvb_frontend *fe)
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{
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struct tua9001_dev *dev = fe->tuner_priv;
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struct i2c_client *client = dev->client;
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int ret, i;
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static const struct tua9001_reg_val data[] = {
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{0x1e, 0x6512},
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{0x25, 0xb888},
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{0x39, 0x5460},
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{0x3b, 0x00c0},
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{0x3a, 0xf000},
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{0x08, 0x0000},
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{0x32, 0x0030},
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{0x41, 0x703a},
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{0x40, 0x1c78},
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{0x2c, 0x1c00},
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{0x36, 0xc013},
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{0x37, 0x6f18},
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{0x27, 0x0008},
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{0x2a, 0x0001},
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{0x34, 0x0a40},
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};
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dev_dbg(&client->dev, "\n");
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if (fe->callback) {
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ret = fe->callback(client->adapter,
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DVB_FRONTEND_COMPONENT_TUNER,
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TUA9001_CMD_RESETN, 0);
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if (ret)
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goto err;
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}
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for (i = 0; i < ARRAY_SIZE(data); i++) {
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ret = regmap_write(dev->regmap, data[i].reg, data[i].val);
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if (ret)
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goto err;
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}
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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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return ret;
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}
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static int tua9001_sleep(struct dvb_frontend *fe)
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{
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struct tua9001_dev *dev = fe->tuner_priv;
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struct i2c_client *client = dev->client;
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int ret;
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dev_dbg(&client->dev, "\n");
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if (fe->callback) {
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ret = fe->callback(client->adapter,
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DVB_FRONTEND_COMPONENT_TUNER,
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TUA9001_CMD_RESETN, 1);
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if (ret)
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goto err;
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}
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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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return ret;
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}
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static int tua9001_set_params(struct dvb_frontend *fe)
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{
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struct tua9001_dev *dev = fe->tuner_priv;
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struct i2c_client *client = dev->client;
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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int ret, i;
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u16 val;
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struct tua9001_reg_val data[2];
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dev_dbg(&client->dev,
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"delivery_system=%u frequency=%u bandwidth_hz=%u\n",
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c->delivery_system, c->frequency, c->bandwidth_hz);
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switch (c->delivery_system) {
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case SYS_DVBT:
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switch (c->bandwidth_hz) {
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case 8000000:
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val = 0x0000;
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break;
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case 7000000:
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val = 0x1000;
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break;
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case 6000000:
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val = 0x2000;
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break;
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case 5000000:
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val = 0x3000;
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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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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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data[0].reg = 0x04;
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data[0].val = val;
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data[1].reg = 0x1f;
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data[1].val = div_u64((u64) (c->frequency - 150000000) * 48, 1000000);
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if (fe->callback) {
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ret = fe->callback(client->adapter,
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DVB_FRONTEND_COMPONENT_TUNER,
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TUA9001_CMD_RXEN, 0);
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if (ret)
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goto err;
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}
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for (i = 0; i < ARRAY_SIZE(data); i++) {
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ret = regmap_write(dev->regmap, data[i].reg, data[i].val);
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if (ret)
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goto err;
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}
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if (fe->callback) {
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ret = fe->callback(client->adapter,
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DVB_FRONTEND_COMPONENT_TUNER,
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TUA9001_CMD_RXEN, 1);
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if (ret)
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goto err;
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}
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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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return ret;
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}
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static int tua9001_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
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{
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struct tua9001_dev *dev = fe->tuner_priv;
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struct i2c_client *client = dev->client;
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dev_dbg(&client->dev, "\n");
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*frequency = 0; /* Zero-IF */
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return 0;
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}
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static const struct dvb_tuner_ops tua9001_tuner_ops = {
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.info = {
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.name = "Infineon TUA9001",
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.frequency_min_hz = 170 * MHz,
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.frequency_max_hz = 862 * MHz,
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},
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.init = tua9001_init,
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.sleep = tua9001_sleep,
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.set_params = tua9001_set_params,
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.get_if_frequency = tua9001_get_if_frequency,
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};
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static int tua9001_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct tua9001_dev *dev;
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struct tua9001_platform_data *pdata = client->dev.platform_data;
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struct dvb_frontend *fe = pdata->dvb_frontend;
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int ret;
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static const struct regmap_config regmap_config = {
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.reg_bits = 8,
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.val_bits = 16,
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};
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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->fe = pdata->dvb_frontend;
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dev->client = client;
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dev->regmap = devm_regmap_init_i2c(client, ®map_config);
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if (IS_ERR(dev->regmap)) {
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ret = PTR_ERR(dev->regmap);
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goto err_kfree;
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}
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if (fe->callback) {
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ret = fe->callback(client->adapter,
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DVB_FRONTEND_COMPONENT_TUNER,
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TUA9001_CMD_CEN, 1);
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if (ret)
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goto err_kfree;
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ret = fe->callback(client->adapter,
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DVB_FRONTEND_COMPONENT_TUNER,
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TUA9001_CMD_RXEN, 0);
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if (ret)
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goto err_kfree;
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ret = fe->callback(client->adapter,
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DVB_FRONTEND_COMPONENT_TUNER,
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TUA9001_CMD_RESETN, 1);
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if (ret)
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goto err_kfree;
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}
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fe->tuner_priv = dev;
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memcpy(&fe->ops.tuner_ops, &tua9001_tuner_ops,
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sizeof(struct dvb_tuner_ops));
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i2c_set_clientdata(client, dev);
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dev_info(&client->dev, "Infineon TUA9001 successfully attached\n");
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return 0;
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err_kfree:
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kfree(dev);
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err:
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dev_dbg(&client->dev, "failed=%d\n", ret);
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return ret;
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}
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static int tua9001_remove(struct i2c_client *client)
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{
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struct tua9001_dev *dev = i2c_get_clientdata(client);
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struct dvb_frontend *fe = dev->fe;
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int ret;
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dev_dbg(&client->dev, "\n");
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if (fe->callback) {
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ret = fe->callback(client->adapter,
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DVB_FRONTEND_COMPONENT_TUNER,
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TUA9001_CMD_CEN, 0);
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if (ret)
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dev_err(&client->dev, "Tuner disable failed (%pe)\n", ERR_PTR(ret));
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}
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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 tua9001_id_table[] = {
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{"tua9001", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, tua9001_id_table);
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static struct i2c_driver tua9001_driver = {
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.driver = {
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.name = "tua9001",
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.suppress_bind_attrs = true,
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},
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.probe = tua9001_probe,
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.remove = tua9001_remove,
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.id_table = tua9001_id_table,
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};
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module_i2c_driver(tua9001_driver);
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MODULE_DESCRIPTION("Infineon TUA9001 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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