1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * NXP TDA18212HN silicon tuner driver 4 * 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 0 27 #define DVBT_7 1 28 #define DVBT_8 2 29 #define DVBT2_6 3 30 #define DVBT2_7 4 31 #define DVBT2_8 5 32 #define DVBC_6 6 33 #define DVBC_8 7 34 #define ATSC_VSB 8 35 #define ATSC_QAM 9 36 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", 0}, 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