276 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * NXP TDA18212HN silicon tuner driver4 *5 * Copyright (C) 2011 Antti Palosaari <crope@iki.fi>6 */7 8#include "tda18212.h"9#include <linux/regmap.h>10 11struct tda18212_dev {12 struct tda18212_config cfg;13 struct i2c_client *client;14 struct regmap *regmap;15 16 u32 if_frequency;17};18 19static int tda18212_set_params(struct dvb_frontend *fe)20{21 struct tda18212_dev *dev = fe->tuner_priv;22 struct dtv_frontend_properties *c = &fe->dtv_property_cache;23 int ret, i;24 u32 if_khz;25 u8 buf[9];26 #define DVBT_6 027 #define DVBT_7 128 #define DVBT_8 229 #define DVBT2_6 330 #define DVBT2_7 431 #define DVBT2_8 532 #define DVBC_6 633 #define DVBC_8 734 #define ATSC_VSB 835 #define ATSC_QAM 936 static const u8 bw_params[][3] = {37 /* reg: 0f 13 23 */38 [DVBT_6] = { 0xb3, 0x20, 0x03 },39 [DVBT_7] = { 0xb3, 0x31, 0x01 },40 [DVBT_8] = { 0xb3, 0x22, 0x01 },41 [DVBT2_6] = { 0xbc, 0x20, 0x03 },42 [DVBT2_7] = { 0xbc, 0x72, 0x03 },43 [DVBT2_8] = { 0xbc, 0x22, 0x01 },44 [DVBC_6] = { 0x92, 0x50, 0x03 },45 [DVBC_8] = { 0x92, 0x53, 0x03 },46 [ATSC_VSB] = { 0x7d, 0x20, 0x63 },47 [ATSC_QAM] = { 0x7d, 0x20, 0x63 },48 };49 50 dev_dbg(&dev->client->dev,51 "delivery_system=%d frequency=%d bandwidth_hz=%d\n",52 c->delivery_system, c->frequency,53 c->bandwidth_hz);54 55 if (fe->ops.i2c_gate_ctrl)56 fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */57 58 switch (c->delivery_system) {59 case SYS_ATSC:60 if_khz = dev->cfg.if_atsc_vsb;61 i = ATSC_VSB;62 break;63 case SYS_DVBC_ANNEX_B:64 if_khz = dev->cfg.if_atsc_qam;65 i = ATSC_QAM;66 break;67 case SYS_DVBT:68 switch (c->bandwidth_hz) {69 case 6000000:70 if_khz = dev->cfg.if_dvbt_6;71 i = DVBT_6;72 break;73 case 7000000:74 if_khz = dev->cfg.if_dvbt_7;75 i = DVBT_7;76 break;77 case 8000000:78 if_khz = dev->cfg.if_dvbt_8;79 i = DVBT_8;80 break;81 default:82 ret = -EINVAL;83 goto error;84 }85 break;86 case SYS_DVBT2:87 switch (c->bandwidth_hz) {88 case 6000000:89 if_khz = dev->cfg.if_dvbt2_6;90 i = DVBT2_6;91 break;92 case 7000000:93 if_khz = dev->cfg.if_dvbt2_7;94 i = DVBT2_7;95 break;96 case 8000000:97 if_khz = dev->cfg.if_dvbt2_8;98 i = DVBT2_8;99 break;100 default:101 ret = -EINVAL;102 goto error;103 }104 break;105 case SYS_DVBC_ANNEX_A:106 case SYS_DVBC_ANNEX_C:107 if_khz = dev->cfg.if_dvbc;108 i = DVBC_8;109 break;110 default:111 ret = -EINVAL;112 goto error;113 }114 115 ret = regmap_write(dev->regmap, 0x23, bw_params[i][2]);116 if (ret)117 goto error;118 119 ret = regmap_write(dev->regmap, 0x06, 0x00);120 if (ret)121 goto error;122 123 ret = regmap_write(dev->regmap, 0x0f, bw_params[i][0]);124 if (ret)125 goto error;126 127 buf[0] = 0x02;128 buf[1] = bw_params[i][1];129 buf[2] = 0x03; /* default value */130 buf[3] = DIV_ROUND_CLOSEST(if_khz, 50);131 buf[4] = ((c->frequency / 1000) >> 16) & 0xff;132 buf[5] = ((c->frequency / 1000) >> 8) & 0xff;133 buf[6] = ((c->frequency / 1000) >> 0) & 0xff;134 buf[7] = 0xc1;135 buf[8] = 0x01;136 ret = regmap_bulk_write(dev->regmap, 0x12, buf, sizeof(buf));137 if (ret)138 goto error;139 140 /* actual IF rounded as it is on register */141 dev->if_frequency = buf[3] * 50 * 1000;142 143exit:144 if (fe->ops.i2c_gate_ctrl)145 fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */146 147 return ret;148 149error:150 dev_dbg(&dev->client->dev, "failed=%d\n", ret);151 goto exit;152}153 154static int tda18212_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)155{156 struct tda18212_dev *dev = fe->tuner_priv;157 158 *frequency = dev->if_frequency;159 160 return 0;161}162 163static const struct dvb_tuner_ops tda18212_tuner_ops = {164 .info = {165 .name = "NXP TDA18212",166 167 .frequency_min_hz = 48 * MHz,168 .frequency_max_hz = 864 * MHz,169 .frequency_step_hz = 1 * kHz,170 },171 172 .set_params = tda18212_set_params,173 .get_if_frequency = tda18212_get_if_frequency,174};175 176static int tda18212_probe(struct i2c_client *client)177{178 struct tda18212_config *cfg = client->dev.platform_data;179 struct dvb_frontend *fe = cfg->fe;180 struct tda18212_dev *dev;181 int ret;182 unsigned int chip_id;183 char *version;184 static const struct regmap_config regmap_config = {185 .reg_bits = 8,186 .val_bits = 8,187 };188 189 dev = kzalloc(sizeof(*dev), GFP_KERNEL);190 if (dev == NULL) {191 ret = -ENOMEM;192 dev_err(&client->dev, "kzalloc() failed\n");193 goto err;194 }195 196 memcpy(&dev->cfg, cfg, sizeof(struct tda18212_config));197 dev->client = client;198 dev->regmap = devm_regmap_init_i2c(client, ®map_config);199 if (IS_ERR(dev->regmap)) {200 ret = PTR_ERR(dev->regmap);201 goto err;202 }203 204 /* check if the tuner is there */205 if (fe->ops.i2c_gate_ctrl)206 fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */207 208 ret = regmap_read(dev->regmap, 0x00, &chip_id);209 dev_dbg(&dev->client->dev, "chip_id=%02x\n", chip_id);210 211 if (fe->ops.i2c_gate_ctrl)212 fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */213 214 if (ret)215 goto err;216 217 switch (chip_id) {218 case 0xc7:219 version = "M"; /* master */220 break;221 case 0x47:222 version = "S"; /* slave */223 break;224 default:225 ret = -ENODEV;226 goto err;227 }228 229 dev_info(&dev->client->dev,230 "NXP TDA18212HN/%s successfully identified\n", version);231 232 fe->tuner_priv = dev;233 memcpy(&fe->ops.tuner_ops, &tda18212_tuner_ops,234 sizeof(struct dvb_tuner_ops));235 i2c_set_clientdata(client, dev);236 237 return 0;238err:239 dev_dbg(&client->dev, "failed=%d\n", ret);240 kfree(dev);241 return ret;242}243 244static void tda18212_remove(struct i2c_client *client)245{246 struct tda18212_dev *dev = i2c_get_clientdata(client);247 struct dvb_frontend *fe = dev->cfg.fe;248 249 dev_dbg(&client->dev, "\n");250 251 memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));252 fe->tuner_priv = NULL;253 kfree(dev);254}255 256static const struct i2c_device_id tda18212_id[] = {257 { "tda18212" },258 {}259};260MODULE_DEVICE_TABLE(i2c, tda18212_id);261 262static struct i2c_driver tda18212_driver = {263 .driver = {264 .name = "tda18212",265 },266 .probe = tda18212_probe,267 .remove = tda18212_remove,268 .id_table = tda18212_id,269};270 271module_i2c_driver(tda18212_driver);272 273MODULE_DESCRIPTION("NXP TDA18212HN silicon tuner driver");274MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");275MODULE_LICENSE("GPL");276