1 /* 2 * Panasonic MN88472 DVB-T/T2/C demodulator driver 3 * 4 * Copyright (C) 2013 Antti Palosaari <crope@iki.fi> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 */ 16 17 #include "mn88472_priv.h" 18 19 static int mn88472_get_tune_settings(struct dvb_frontend *fe, 20 struct dvb_frontend_tune_settings *s) 21 { 22 s->min_delay_ms = 400; 23 return 0; 24 } 25 26 static int mn88472_set_frontend(struct dvb_frontend *fe) 27 { 28 struct i2c_client *client = fe->demodulator_priv; 29 struct mn88472_dev *dev = i2c_get_clientdata(client); 30 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 31 int ret; 32 u32 if_frequency = 0; 33 34 dev_dbg(&client->dev, 35 "delivery_system=%d modulation=%d frequency=%d symbol_rate=%d inversion=%d\n", 36 c->delivery_system, c->modulation, 37 c->frequency, c->symbol_rate, c->inversion); 38 39 if (!dev->warm) { 40 ret = -EAGAIN; 41 goto err; 42 } 43 44 /* program tuner */ 45 if (fe->ops.tuner_ops.set_params) { 46 ret = fe->ops.tuner_ops.set_params(fe); 47 if (ret) 48 goto err; 49 } 50 51 if (fe->ops.tuner_ops.get_if_frequency) { 52 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency); 53 if (ret) 54 goto err; 55 56 dev_dbg(&client->dev, "get_if_frequency=%d\n", if_frequency); 57 } 58 59 if (if_frequency != 5070000) { 60 dev_err(&client->dev, "IF frequency %d not supported\n", 61 if_frequency); 62 ret = -EINVAL; 63 goto err; 64 } 65 66 ret = regmap_write(dev->regmap[2], 0x08, 0x1d); 67 if (ret) 68 goto err; 69 70 ret = regmap_write(dev->regmap[0], 0xd9, 0xe3); 71 if (ret) 72 goto err; 73 74 ret = regmap_write(dev->regmap[2], 0x83, 0x01); 75 if (ret) 76 goto err; 77 78 ret = regmap_bulk_write(dev->regmap[2], 0x00, 79 "\x66\x00\x01\x04\x00", 5); 80 if (ret) 81 goto err; 82 83 ret = regmap_bulk_write(dev->regmap[2], 0x10, 84 "\x3f\x50\x2c\x8f\x80\x00\x08\xee\x08\xee", 10); 85 if (ret) 86 goto err; 87 88 ret = regmap_write(dev->regmap[0], 0x46, 0x00); 89 if (ret) 90 goto err; 91 92 ret = regmap_write(dev->regmap[0], 0xae, 0x00); 93 if (ret) 94 goto err; 95 96 ret = regmap_write(dev->regmap[0], 0xb0, 0x0b); 97 if (ret) 98 goto err; 99 100 ret = regmap_write(dev->regmap[0], 0xb4, 0x00); 101 if (ret) 102 goto err; 103 104 ret = regmap_write(dev->regmap[0], 0xcd, 0x17); 105 if (ret) 106 goto err; 107 108 ret = regmap_write(dev->regmap[0], 0xd4, 0x09); 109 if (ret) 110 goto err; 111 112 ret = regmap_write(dev->regmap[0], 0xd6, 0x48); 113 if (ret) 114 goto err; 115 116 ret = regmap_write(dev->regmap[1], 0x00, 0xb0); 117 if (ret) 118 goto err; 119 120 ret = regmap_write(dev->regmap[2], 0xf8, 0x9f); 121 if (ret) 122 goto err; 123 124 dev->delivery_system = c->delivery_system; 125 126 return 0; 127 err: 128 dev_dbg(&client->dev, "failed=%d\n", ret); 129 return ret; 130 } 131 132 static int mn88472_read_status(struct dvb_frontend *fe, fe_status_t *status) 133 { 134 struct i2c_client *client = fe->demodulator_priv; 135 struct mn88472_dev *dev = i2c_get_clientdata(client); 136 int ret; 137 unsigned int utmp; 138 139 *status = 0; 140 141 if (!dev->warm) { 142 ret = -EAGAIN; 143 goto err; 144 } 145 146 ret = regmap_read(dev->regmap[1], 0x84, &utmp); 147 if (ret) 148 goto err; 149 150 if (utmp == 0x08) 151 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | 152 FE_HAS_SYNC | FE_HAS_LOCK; 153 154 return 0; 155 err: 156 dev_dbg(&client->dev, "failed=%d\n", ret); 157 return ret; 158 } 159 160 static int mn88472_init(struct dvb_frontend *fe) 161 { 162 struct i2c_client *client = fe->demodulator_priv; 163 struct mn88472_dev *dev = i2c_get_clientdata(client); 164 int ret, len, remaining; 165 const struct firmware *fw = NULL; 166 u8 *fw_file = MN88472_FIRMWARE; 167 168 dev_dbg(&client->dev, "\n"); 169 170 /* set cold state by default */ 171 dev->warm = false; 172 173 /* power on */ 174 ret = regmap_write(dev->regmap[2], 0x05, 0x00); 175 if (ret) 176 goto err; 177 178 ret = regmap_bulk_write(dev->regmap[2], 0x0b, "\x00\x00", 2); 179 if (ret) 180 goto err; 181 182 /* request the firmware, this will block and timeout */ 183 ret = request_firmware(&fw, fw_file, &client->dev); 184 if (ret) { 185 dev_err(&client->dev, "firmare file '%s' not found\n", 186 fw_file); 187 goto err; 188 } 189 190 dev_info(&client->dev, "downloading firmware from file '%s'\n", 191 fw_file); 192 193 ret = regmap_write(dev->regmap[0], 0xf5, 0x03); 194 if (ret) 195 goto err; 196 197 for (remaining = fw->size; remaining > 0; 198 remaining -= (dev->i2c_wr_max - 1)) { 199 len = remaining; 200 if (len > (dev->i2c_wr_max - 1)) 201 len = (dev->i2c_wr_max - 1); 202 203 ret = regmap_bulk_write(dev->regmap[0], 0xf6, 204 &fw->data[fw->size - remaining], len); 205 if (ret) { 206 dev_err(&client->dev, 207 "firmware download failed=%d\n", ret); 208 goto err; 209 } 210 } 211 212 ret = regmap_write(dev->regmap[0], 0xf5, 0x00); 213 if (ret) 214 goto err; 215 216 release_firmware(fw); 217 fw = NULL; 218 219 /* warm state */ 220 dev->warm = true; 221 222 return 0; 223 err: 224 if (fw) 225 release_firmware(fw); 226 227 dev_dbg(&client->dev, "failed=%d\n", ret); 228 return ret; 229 } 230 231 static int mn88472_sleep(struct dvb_frontend *fe) 232 { 233 struct i2c_client *client = fe->demodulator_priv; 234 struct mn88472_dev *dev = i2c_get_clientdata(client); 235 int ret; 236 237 dev_dbg(&client->dev, "\n"); 238 239 /* power off */ 240 ret = regmap_write(dev->regmap[2], 0x0b, 0x30); 241 242 if (ret) 243 goto err; 244 245 ret = regmap_write(dev->regmap[2], 0x05, 0x3e); 246 if (ret) 247 goto err; 248 249 dev->delivery_system = SYS_UNDEFINED; 250 251 return 0; 252 err: 253 dev_dbg(&client->dev, "failed=%d\n", ret); 254 return ret; 255 } 256 257 static struct dvb_frontend_ops mn88472_ops = { 258 .delsys = {SYS_DVBC_ANNEX_A}, 259 .info = { 260 .name = "Panasonic MN88472", 261 .caps = FE_CAN_FEC_1_2 | 262 FE_CAN_FEC_2_3 | 263 FE_CAN_FEC_3_4 | 264 FE_CAN_FEC_5_6 | 265 FE_CAN_FEC_7_8 | 266 FE_CAN_FEC_AUTO | 267 FE_CAN_QPSK | 268 FE_CAN_QAM_16 | 269 FE_CAN_QAM_32 | 270 FE_CAN_QAM_64 | 271 FE_CAN_QAM_128 | 272 FE_CAN_QAM_256 | 273 FE_CAN_QAM_AUTO | 274 FE_CAN_TRANSMISSION_MODE_AUTO | 275 FE_CAN_GUARD_INTERVAL_AUTO | 276 FE_CAN_HIERARCHY_AUTO | 277 FE_CAN_MUTE_TS | 278 FE_CAN_2G_MODULATION | 279 FE_CAN_MULTISTREAM 280 }, 281 282 .get_tune_settings = mn88472_get_tune_settings, 283 284 .init = mn88472_init, 285 .sleep = mn88472_sleep, 286 287 .set_frontend = mn88472_set_frontend, 288 289 .read_status = mn88472_read_status, 290 }; 291 292 static int mn88472_probe(struct i2c_client *client, 293 const struct i2c_device_id *id) 294 { 295 struct mn88472_config *config = client->dev.platform_data; 296 struct mn88472_dev *dev; 297 int ret; 298 unsigned int utmp; 299 static const struct regmap_config regmap_config = { 300 .reg_bits = 8, 301 .val_bits = 8, 302 }; 303 304 dev_dbg(&client->dev, "\n"); 305 306 /* Caller really need to provide pointer for frontend we create. */ 307 if (config->fe == NULL) { 308 dev_err(&client->dev, "frontend pointer not defined\n"); 309 ret = -EINVAL; 310 goto err; 311 } 312 313 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 314 if (dev == NULL) { 315 ret = -ENOMEM; 316 goto err; 317 } 318 319 dev->i2c_wr_max = config->i2c_wr_max; 320 dev->client[0] = client; 321 dev->regmap[0] = regmap_init_i2c(dev->client[0], ®map_config); 322 if (IS_ERR(dev->regmap[0])) { 323 ret = PTR_ERR(dev->regmap[0]); 324 goto err_kfree; 325 } 326 327 /* check demod answers to I2C */ 328 ret = regmap_read(dev->regmap[0], 0x00, &utmp); 329 if (ret) 330 goto err_regmap_0_regmap_exit; 331 332 /* 333 * Chip has three I2C addresses for different register pages. Used 334 * addresses are 0x18, 0x1a and 0x1c. We register two dummy clients, 335 * 0x1a and 0x1c, in order to get own I2C client for each register page. 336 */ 337 dev->client[1] = i2c_new_dummy(client->adapter, 0x1a); 338 if (dev->client[1] == NULL) { 339 ret = -ENODEV; 340 dev_err(&client->dev, "I2C registration failed\n"); 341 if (ret) 342 goto err_regmap_0_regmap_exit; 343 } 344 dev->regmap[1] = regmap_init_i2c(dev->client[1], ®map_config); 345 if (IS_ERR(dev->regmap[1])) { 346 ret = PTR_ERR(dev->regmap[1]); 347 goto err_client_1_i2c_unregister_device; 348 } 349 i2c_set_clientdata(dev->client[1], dev); 350 351 dev->client[2] = i2c_new_dummy(client->adapter, 0x1c); 352 if (dev->client[2] == NULL) { 353 ret = -ENODEV; 354 dev_err(&client->dev, "2nd I2C registration failed\n"); 355 if (ret) 356 goto err_regmap_1_regmap_exit; 357 } 358 dev->regmap[2] = regmap_init_i2c(dev->client[2], ®map_config); 359 if (IS_ERR(dev->regmap[2])) { 360 ret = PTR_ERR(dev->regmap[2]); 361 goto err_client_2_i2c_unregister_device; 362 } 363 i2c_set_clientdata(dev->client[2], dev); 364 365 /* create dvb_frontend */ 366 memcpy(&dev->fe.ops, &mn88472_ops, sizeof(struct dvb_frontend_ops)); 367 dev->fe.demodulator_priv = client; 368 *config->fe = &dev->fe; 369 i2c_set_clientdata(client, dev); 370 371 dev_info(&client->dev, "Panasonic MN88472 successfully attached\n"); 372 return 0; 373 374 err_client_2_i2c_unregister_device: 375 i2c_unregister_device(dev->client[2]); 376 err_regmap_1_regmap_exit: 377 regmap_exit(dev->regmap[1]); 378 err_client_1_i2c_unregister_device: 379 i2c_unregister_device(dev->client[1]); 380 err_regmap_0_regmap_exit: 381 regmap_exit(dev->regmap[0]); 382 err_kfree: 383 kfree(dev); 384 err: 385 dev_dbg(&client->dev, "failed=%d\n", ret); 386 return ret; 387 } 388 389 static int mn88472_remove(struct i2c_client *client) 390 { 391 struct mn88472_dev *dev = i2c_get_clientdata(client); 392 393 dev_dbg(&client->dev, "\n"); 394 395 regmap_exit(dev->regmap[2]); 396 i2c_unregister_device(dev->client[2]); 397 398 regmap_exit(dev->regmap[1]); 399 i2c_unregister_device(dev->client[1]); 400 401 regmap_exit(dev->regmap[0]); 402 403 kfree(dev); 404 405 return 0; 406 } 407 408 static const struct i2c_device_id mn88472_id_table[] = { 409 {"mn88472", 0}, 410 {} 411 }; 412 MODULE_DEVICE_TABLE(i2c, mn88472_id_table); 413 414 static struct i2c_driver mn88472_driver = { 415 .driver = { 416 .owner = THIS_MODULE, 417 .name = "mn88472", 418 }, 419 .probe = mn88472_probe, 420 .remove = mn88472_remove, 421 .id_table = mn88472_id_table, 422 }; 423 424 module_i2c_driver(mn88472_driver); 425 426 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); 427 MODULE_DESCRIPTION("Panasonic MN88472 DVB-T/T2/C demodulator driver"); 428 MODULE_LICENSE("GPL"); 429 MODULE_FIRMWARE(MN88472_FIRMWARE); 430