292 lines
6.6 KiB
C
292 lines
6.6 KiB
C
/*
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* NXP TDA18212HN silicon tuner driver
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*
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* Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "tda18212.h"
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#include <linux/regmap.h>
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struct tda18212_dev {
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struct tda18212_config cfg;
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struct i2c_client *client;
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struct regmap *regmap;
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u32 if_frequency;
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};
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static int tda18212_set_params(struct dvb_frontend *fe)
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{
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struct tda18212_dev *dev = fe->tuner_priv;
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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int ret, i;
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u32 if_khz;
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u8 buf[9];
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#define DVBT_6 0
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#define DVBT_7 1
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#define DVBT_8 2
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#define DVBT2_6 3
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#define DVBT2_7 4
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#define DVBT2_8 5
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#define DVBC_6 6
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#define DVBC_8 7
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#define ATSC_VSB 8
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#define ATSC_QAM 9
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static const u8 bw_params[][3] = {
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/* reg: 0f 13 23 */
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[DVBT_6] = { 0xb3, 0x20, 0x03 },
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[DVBT_7] = { 0xb3, 0x31, 0x01 },
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[DVBT_8] = { 0xb3, 0x22, 0x01 },
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[DVBT2_6] = { 0xbc, 0x20, 0x03 },
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[DVBT2_7] = { 0xbc, 0x72, 0x03 },
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[DVBT2_8] = { 0xbc, 0x22, 0x01 },
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[DVBC_6] = { 0x92, 0x50, 0x03 },
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[DVBC_8] = { 0x92, 0x53, 0x03 },
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[ATSC_VSB] = { 0x7d, 0x20, 0x63 },
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[ATSC_QAM] = { 0x7d, 0x20, 0x63 },
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};
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dev_dbg(&dev->client->dev,
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"delivery_system=%d frequency=%d bandwidth_hz=%d\n",
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c->delivery_system, c->frequency,
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c->bandwidth_hz);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
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switch (c->delivery_system) {
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case SYS_ATSC:
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if_khz = dev->cfg.if_atsc_vsb;
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i = ATSC_VSB;
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break;
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case SYS_DVBC_ANNEX_B:
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if_khz = dev->cfg.if_atsc_qam;
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i = ATSC_QAM;
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break;
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case SYS_DVBT:
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switch (c->bandwidth_hz) {
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case 6000000:
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if_khz = dev->cfg.if_dvbt_6;
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i = DVBT_6;
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break;
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case 7000000:
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if_khz = dev->cfg.if_dvbt_7;
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i = DVBT_7;
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break;
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case 8000000:
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if_khz = dev->cfg.if_dvbt_8;
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i = DVBT_8;
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break;
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default:
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ret = -EINVAL;
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goto error;
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}
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break;
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case SYS_DVBT2:
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switch (c->bandwidth_hz) {
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case 6000000:
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if_khz = dev->cfg.if_dvbt2_6;
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i = DVBT2_6;
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break;
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case 7000000:
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if_khz = dev->cfg.if_dvbt2_7;
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i = DVBT2_7;
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break;
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case 8000000:
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if_khz = dev->cfg.if_dvbt2_8;
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i = DVBT2_8;
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break;
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default:
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ret = -EINVAL;
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goto error;
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}
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break;
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case SYS_DVBC_ANNEX_A:
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case SYS_DVBC_ANNEX_C:
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if_khz = dev->cfg.if_dvbc;
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i = DVBC_8;
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break;
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default:
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ret = -EINVAL;
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goto error;
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}
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ret = regmap_write(dev->regmap, 0x23, bw_params[i][2]);
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if (ret)
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goto error;
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ret = regmap_write(dev->regmap, 0x06, 0x00);
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if (ret)
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goto error;
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ret = regmap_write(dev->regmap, 0x0f, bw_params[i][0]);
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if (ret)
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goto error;
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buf[0] = 0x02;
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buf[1] = bw_params[i][1];
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buf[2] = 0x03; /* default value */
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buf[3] = DIV_ROUND_CLOSEST(if_khz, 50);
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buf[4] = ((c->frequency / 1000) >> 16) & 0xff;
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buf[5] = ((c->frequency / 1000) >> 8) & 0xff;
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buf[6] = ((c->frequency / 1000) >> 0) & 0xff;
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buf[7] = 0xc1;
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buf[8] = 0x01;
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ret = regmap_bulk_write(dev->regmap, 0x12, buf, sizeof(buf));
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if (ret)
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goto error;
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/* actual IF rounded as it is on register */
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dev->if_frequency = buf[3] * 50 * 1000;
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exit:
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
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return ret;
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error:
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dev_dbg(&dev->client->dev, "failed=%d\n", ret);
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goto exit;
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}
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static int tda18212_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
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{
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struct tda18212_dev *dev = fe->tuner_priv;
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*frequency = dev->if_frequency;
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return 0;
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}
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static const struct dvb_tuner_ops tda18212_tuner_ops = {
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.info = {
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.name = "NXP TDA18212",
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.frequency_min_hz = 48 * MHz,
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.frequency_max_hz = 864 * MHz,
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.frequency_step_hz = 1 * kHz,
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},
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.set_params = tda18212_set_params,
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.get_if_frequency = tda18212_get_if_frequency,
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};
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static int tda18212_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct tda18212_config *cfg = client->dev.platform_data;
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struct dvb_frontend *fe = cfg->fe;
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struct tda18212_dev *dev;
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int ret;
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unsigned int chip_id;
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char *version;
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static const struct regmap_config regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (dev == NULL) {
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ret = -ENOMEM;
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dev_err(&client->dev, "kzalloc() failed\n");
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goto err;
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}
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memcpy(&dev->cfg, cfg, sizeof(struct tda18212_config));
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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;
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}
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/* check if the tuner is there */
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
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ret = regmap_read(dev->regmap, 0x00, &chip_id);
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dev_dbg(&dev->client->dev, "chip_id=%02x\n", chip_id);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
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if (ret)
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goto err;
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switch (chip_id) {
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case 0xc7:
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version = "M"; /* master */
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break;
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case 0x47:
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version = "S"; /* slave */
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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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dev_info(&dev->client->dev,
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"NXP TDA18212HN/%s successfully identified\n", version);
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fe->tuner_priv = dev;
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memcpy(&fe->ops.tuner_ops, &tda18212_tuner_ops,
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sizeof(struct dvb_tuner_ops));
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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 tda18212_remove(struct i2c_client *client)
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{
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struct tda18212_dev *dev = i2c_get_clientdata(client);
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struct dvb_frontend *fe = dev->cfg.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 tda18212_id[] = {
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{"tda18212", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, tda18212_id);
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static struct i2c_driver tda18212_driver = {
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.driver = {
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.name = "tda18212",
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},
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.probe = tda18212_probe,
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.remove = tda18212_remove,
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.id_table = tda18212_id,
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};
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module_i2c_driver(tda18212_driver);
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MODULE_DESCRIPTION("NXP TDA18212HN 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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