Andrey Smirnov | b879a9c | 2013-04-18 20:46:08 -0300 | [diff] [blame^] | 1 | /* |
| 2 | * drivers/media/radio/radio-si476x.c -- V4L2 driver for SI476X chips |
| 3 | * |
| 4 | * Copyright (C) 2012 Innovative Converged Devices(ICD) |
| 5 | * Copyright (C) 2013 Andrey Smirnov |
| 6 | * |
| 7 | * Author: Andrey Smirnov <andrew.smirnov@gmail.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; version 2 of the License. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | */ |
| 19 | |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/delay.h> |
| 22 | #include <linux/interrupt.h> |
| 23 | #include <linux/slab.h> |
| 24 | #include <linux/atomic.h> |
| 25 | #include <linux/videodev2.h> |
| 26 | #include <linux/mutex.h> |
| 27 | #include <linux/debugfs.h> |
| 28 | #include <media/v4l2-common.h> |
| 29 | #include <media/v4l2-ioctl.h> |
| 30 | #include <media/v4l2-ctrls.h> |
| 31 | #include <media/v4l2-event.h> |
| 32 | #include <media/v4l2-device.h> |
| 33 | |
| 34 | #include <media/si476x.h> |
| 35 | #include <linux/mfd/si476x-core.h> |
| 36 | |
| 37 | #define FM_FREQ_RANGE_LOW 64000000 |
| 38 | #define FM_FREQ_RANGE_HIGH 108000000 |
| 39 | |
| 40 | #define AM_FREQ_RANGE_LOW 520000 |
| 41 | #define AM_FREQ_RANGE_HIGH 30000000 |
| 42 | |
| 43 | #define PWRLINEFLTR (1 << 8) |
| 44 | |
| 45 | #define FREQ_MUL (10000000 / 625) |
| 46 | |
| 47 | #define SI476X_PHDIV_STATUS_LINK_LOCKED(status) (0b10000000 & (status)) |
| 48 | |
| 49 | #define DRIVER_NAME "si476x-radio" |
| 50 | #define DRIVER_CARD "SI476x AM/FM Receiver" |
| 51 | |
| 52 | enum si476x_freq_bands { |
| 53 | SI476X_BAND_FM, |
| 54 | SI476X_BAND_AM, |
| 55 | }; |
| 56 | |
| 57 | static const struct v4l2_frequency_band si476x_bands[] = { |
| 58 | [SI476X_BAND_FM] = { |
| 59 | .type = V4L2_TUNER_RADIO, |
| 60 | .index = SI476X_BAND_FM, |
| 61 | .capability = V4L2_TUNER_CAP_LOW |
| 62 | | V4L2_TUNER_CAP_STEREO |
| 63 | | V4L2_TUNER_CAP_RDS |
| 64 | | V4L2_TUNER_CAP_RDS_BLOCK_IO |
| 65 | | V4L2_TUNER_CAP_FREQ_BANDS, |
| 66 | .rangelow = 64 * FREQ_MUL, |
| 67 | .rangehigh = 108 * FREQ_MUL, |
| 68 | .modulation = V4L2_BAND_MODULATION_FM, |
| 69 | }, |
| 70 | [SI476X_BAND_AM] = { |
| 71 | .type = V4L2_TUNER_RADIO, |
| 72 | .index = SI476X_BAND_AM, |
| 73 | .capability = V4L2_TUNER_CAP_LOW |
| 74 | | V4L2_TUNER_CAP_FREQ_BANDS, |
| 75 | .rangelow = 0.52 * FREQ_MUL, |
| 76 | .rangehigh = 30 * FREQ_MUL, |
| 77 | .modulation = V4L2_BAND_MODULATION_AM, |
| 78 | }, |
| 79 | }; |
| 80 | |
| 81 | static inline bool si476x_radio_freq_is_inside_of_the_band(u32 freq, int band) |
| 82 | { |
| 83 | return freq >= si476x_bands[band].rangelow && |
| 84 | freq <= si476x_bands[band].rangehigh; |
| 85 | } |
| 86 | |
| 87 | static inline bool si476x_radio_range_is_inside_of_the_band(u32 low, u32 high, |
| 88 | int band) |
| 89 | { |
| 90 | return low >= si476x_bands[band].rangelow && |
| 91 | high <= si476x_bands[band].rangehigh; |
| 92 | } |
| 93 | |
| 94 | static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl); |
| 95 | static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl); |
| 96 | |
| 97 | enum phase_diversity_modes_idx { |
| 98 | SI476X_IDX_PHDIV_DISABLED, |
| 99 | SI476X_IDX_PHDIV_PRIMARY_COMBINING, |
| 100 | SI476X_IDX_PHDIV_PRIMARY_ANTENNA, |
| 101 | SI476X_IDX_PHDIV_SECONDARY_ANTENNA, |
| 102 | SI476X_IDX_PHDIV_SECONDARY_COMBINING, |
| 103 | }; |
| 104 | |
| 105 | static const char * const phase_diversity_modes[] = { |
| 106 | [SI476X_IDX_PHDIV_DISABLED] = "Disabled", |
| 107 | [SI476X_IDX_PHDIV_PRIMARY_COMBINING] = "Primary with Secondary", |
| 108 | [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = "Primary Antenna", |
| 109 | [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = "Secondary Antenna", |
| 110 | [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = "Secondary with Primary", |
| 111 | }; |
| 112 | |
| 113 | static inline enum phase_diversity_modes_idx |
| 114 | si476x_phase_diversity_mode_to_idx(enum si476x_phase_diversity_mode mode) |
| 115 | { |
| 116 | switch (mode) { |
| 117 | default: /* FALLTHROUGH */ |
| 118 | case SI476X_PHDIV_DISABLED: |
| 119 | return SI476X_IDX_PHDIV_DISABLED; |
| 120 | case SI476X_PHDIV_PRIMARY_COMBINING: |
| 121 | return SI476X_IDX_PHDIV_PRIMARY_COMBINING; |
| 122 | case SI476X_PHDIV_PRIMARY_ANTENNA: |
| 123 | return SI476X_IDX_PHDIV_PRIMARY_ANTENNA; |
| 124 | case SI476X_PHDIV_SECONDARY_ANTENNA: |
| 125 | return SI476X_IDX_PHDIV_SECONDARY_ANTENNA; |
| 126 | case SI476X_PHDIV_SECONDARY_COMBINING: |
| 127 | return SI476X_IDX_PHDIV_SECONDARY_COMBINING; |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | static inline enum si476x_phase_diversity_mode |
| 132 | si476x_phase_diversity_idx_to_mode(enum phase_diversity_modes_idx idx) |
| 133 | { |
| 134 | static const int idx_to_value[] = { |
| 135 | [SI476X_IDX_PHDIV_DISABLED] = SI476X_PHDIV_DISABLED, |
| 136 | [SI476X_IDX_PHDIV_PRIMARY_COMBINING] = SI476X_PHDIV_PRIMARY_COMBINING, |
| 137 | [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = SI476X_PHDIV_PRIMARY_ANTENNA, |
| 138 | [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = SI476X_PHDIV_SECONDARY_ANTENNA, |
| 139 | [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = SI476X_PHDIV_SECONDARY_COMBINING, |
| 140 | }; |
| 141 | |
| 142 | return idx_to_value[idx]; |
| 143 | } |
| 144 | |
| 145 | static const struct v4l2_ctrl_ops si476x_ctrl_ops = { |
| 146 | .g_volatile_ctrl = si476x_radio_g_volatile_ctrl, |
| 147 | .s_ctrl = si476x_radio_s_ctrl, |
| 148 | }; |
| 149 | |
| 150 | |
| 151 | enum si476x_ctrl_idx { |
| 152 | SI476X_IDX_RSSI_THRESHOLD, |
| 153 | SI476X_IDX_SNR_THRESHOLD, |
| 154 | SI476X_IDX_MAX_TUNE_ERROR, |
| 155 | SI476X_IDX_HARMONICS_COUNT, |
| 156 | SI476X_IDX_DIVERSITY_MODE, |
| 157 | SI476X_IDX_INTERCHIP_LINK, |
| 158 | }; |
| 159 | static struct v4l2_ctrl_config si476x_ctrls[] = { |
| 160 | |
| 161 | /** |
| 162 | * SI476X during its station seeking(or tuning) process uses several |
| 163 | * parameters to detrmine if "the station" is valid: |
| 164 | * |
| 165 | * - Signal's SNR(in dBuV) must be lower than |
| 166 | * #V4L2_CID_SI476X_SNR_THRESHOLD |
| 167 | * - Signal's RSSI(in dBuV) must be greater than |
| 168 | * #V4L2_CID_SI476X_RSSI_THRESHOLD |
| 169 | * - Signal's frequency deviation(in units of 2ppm) must not be |
| 170 | * more than #V4L2_CID_SI476X_MAX_TUNE_ERROR |
| 171 | */ |
| 172 | [SI476X_IDX_RSSI_THRESHOLD] = { |
| 173 | .ops = &si476x_ctrl_ops, |
| 174 | .id = V4L2_CID_SI476X_RSSI_THRESHOLD, |
| 175 | .name = "Valid RSSI Threshold", |
| 176 | .type = V4L2_CTRL_TYPE_INTEGER, |
| 177 | .min = -128, |
| 178 | .max = 127, |
| 179 | .step = 1, |
| 180 | }, |
| 181 | [SI476X_IDX_SNR_THRESHOLD] = { |
| 182 | .ops = &si476x_ctrl_ops, |
| 183 | .id = V4L2_CID_SI476X_SNR_THRESHOLD, |
| 184 | .type = V4L2_CTRL_TYPE_INTEGER, |
| 185 | .name = "Valid SNR Threshold", |
| 186 | .min = -128, |
| 187 | .max = 127, |
| 188 | .step = 1, |
| 189 | }, |
| 190 | [SI476X_IDX_MAX_TUNE_ERROR] = { |
| 191 | .ops = &si476x_ctrl_ops, |
| 192 | .id = V4L2_CID_SI476X_MAX_TUNE_ERROR, |
| 193 | .type = V4L2_CTRL_TYPE_INTEGER, |
| 194 | .name = "Max Tune Errors", |
| 195 | .min = 0, |
| 196 | .max = 126 * 2, |
| 197 | .step = 2, |
| 198 | }, |
| 199 | |
| 200 | /** |
| 201 | * #V4L2_CID_SI476X_HARMONICS_COUNT -- number of harmonics |
| 202 | * built-in power-line noise supression filter is to reject |
| 203 | * during AM-mode operation. |
| 204 | */ |
| 205 | [SI476X_IDX_HARMONICS_COUNT] = { |
| 206 | .ops = &si476x_ctrl_ops, |
| 207 | .id = V4L2_CID_SI476X_HARMONICS_COUNT, |
| 208 | .type = V4L2_CTRL_TYPE_INTEGER, |
| 209 | |
| 210 | .name = "Count of Harmonics to Reject", |
| 211 | .min = 0, |
| 212 | .max = 20, |
| 213 | .step = 1, |
| 214 | }, |
| 215 | |
| 216 | /** |
| 217 | * #V4L2_CID_SI476X_DIVERSITY_MODE -- configuration which |
| 218 | * two tuners working in diversity mode are to work in. |
| 219 | * |
| 220 | * - #SI476X_IDX_PHDIV_DISABLED diversity mode disabled |
| 221 | * - #SI476X_IDX_PHDIV_PRIMARY_COMBINING diversity mode is |
| 222 | * on, primary tuner's antenna is the main one. |
| 223 | * - #SI476X_IDX_PHDIV_PRIMARY_ANTENNA diversity mode is |
| 224 | * off, primary tuner's antenna is the main one. |
| 225 | * - #SI476X_IDX_PHDIV_SECONDARY_ANTENNA diversity mode is |
| 226 | * off, secondary tuner's antenna is the main one. |
| 227 | * - #SI476X_IDX_PHDIV_SECONDARY_COMBINING diversity mode is |
| 228 | * on, secondary tuner's antenna is the main one. |
| 229 | */ |
| 230 | [SI476X_IDX_DIVERSITY_MODE] = { |
| 231 | .ops = &si476x_ctrl_ops, |
| 232 | .id = V4L2_CID_SI476X_DIVERSITY_MODE, |
| 233 | .type = V4L2_CTRL_TYPE_MENU, |
| 234 | .name = "Phase Diversity Mode", |
| 235 | .qmenu = phase_diversity_modes, |
| 236 | .min = 0, |
| 237 | .max = ARRAY_SIZE(phase_diversity_modes) - 1, |
| 238 | }, |
| 239 | |
| 240 | /** |
| 241 | * #V4L2_CID_SI476X_INTERCHIP_LINK -- inter-chip link in |
| 242 | * diversity mode indicator. Allows user to determine if two |
| 243 | * chips working in diversity mode have established a link |
| 244 | * between each other and if the system as a whole uses |
| 245 | * signals from both antennas to receive FM radio. |
| 246 | */ |
| 247 | [SI476X_IDX_INTERCHIP_LINK] = { |
| 248 | .ops = &si476x_ctrl_ops, |
| 249 | .id = V4L2_CID_SI476X_INTERCHIP_LINK, |
| 250 | .type = V4L2_CTRL_TYPE_BOOLEAN, |
| 251 | .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_VOLATILE, |
| 252 | .name = "Inter-Chip Link", |
| 253 | .min = 0, |
| 254 | .max = 1, |
| 255 | .step = 1, |
| 256 | }, |
| 257 | }; |
| 258 | |
| 259 | struct si476x_radio; |
| 260 | |
| 261 | /** |
| 262 | * struct si476x_radio_ops - vtable of tuner functions |
| 263 | * |
| 264 | * This table holds pointers to functions implementing particular |
| 265 | * operations depending on the mode in which the tuner chip was |
| 266 | * configured to start in. If the function is not supported |
| 267 | * corresponding element is set to #NULL. |
| 268 | * |
| 269 | * @tune_freq: Tune chip to a specific frequency |
| 270 | * @seek_start: Star station seeking |
| 271 | * @rsq_status: Get Recieved Signal Quality(RSQ) status |
| 272 | * @rds_blckcnt: Get recived RDS blocks count |
| 273 | * @phase_diversity: Change phase diversity mode of the tuner |
| 274 | * @phase_div_status: Get phase diversity mode status |
| 275 | * @acf_status: Get the status of Automatically Controlled |
| 276 | * Features(ACF) |
| 277 | * @agc_status: Get Automatic Gain Control(AGC) status |
| 278 | */ |
| 279 | struct si476x_radio_ops { |
| 280 | int (*tune_freq)(struct si476x_core *, struct si476x_tune_freq_args *); |
| 281 | int (*seek_start)(struct si476x_core *, bool, bool); |
| 282 | int (*rsq_status)(struct si476x_core *, struct si476x_rsq_status_args *, |
| 283 | struct si476x_rsq_status_report *); |
| 284 | int (*rds_blckcnt)(struct si476x_core *, bool, |
| 285 | struct si476x_rds_blockcount_report *); |
| 286 | |
| 287 | int (*phase_diversity)(struct si476x_core *, |
| 288 | enum si476x_phase_diversity_mode); |
| 289 | int (*phase_div_status)(struct si476x_core *); |
| 290 | int (*acf_status)(struct si476x_core *, |
| 291 | struct si476x_acf_status_report *); |
| 292 | int (*agc_status)(struct si476x_core *, |
| 293 | struct si476x_agc_status_report *); |
| 294 | }; |
| 295 | |
| 296 | /** |
| 297 | * struct si476x_radio - radio device |
| 298 | * |
| 299 | * @core: Pointer to underlying core device |
| 300 | * @videodev: Pointer to video device created by V4L2 subsystem |
| 301 | * @ops: Vtable of functions. See struct si476x_radio_ops for details |
| 302 | * @kref: Reference counter |
| 303 | * @core_lock: An r/w semaphore to brebvent the deletion of underlying |
| 304 | * core structure is the radio device is being used |
| 305 | */ |
| 306 | struct si476x_radio { |
| 307 | struct v4l2_device v4l2dev; |
| 308 | struct video_device videodev; |
| 309 | struct v4l2_ctrl_handler ctrl_handler; |
| 310 | |
| 311 | struct si476x_core *core; |
| 312 | /* This field should not be accesses unless core lock is held */ |
| 313 | const struct si476x_radio_ops *ops; |
| 314 | |
| 315 | struct dentry *debugfs; |
| 316 | u32 audmode; |
| 317 | }; |
| 318 | |
| 319 | static inline struct si476x_radio * |
| 320 | v4l2_dev_to_radio(struct v4l2_device *d) |
| 321 | { |
| 322 | return container_of(d, struct si476x_radio, v4l2dev); |
| 323 | } |
| 324 | |
| 325 | static inline struct si476x_radio * |
| 326 | v4l2_ctrl_handler_to_radio(struct v4l2_ctrl_handler *d) |
| 327 | { |
| 328 | return container_of(d, struct si476x_radio, ctrl_handler); |
| 329 | } |
| 330 | |
| 331 | /* |
| 332 | * si476x_vidioc_querycap - query device capabilities |
| 333 | */ |
| 334 | static int si476x_radio_querycap(struct file *file, void *priv, |
| 335 | struct v4l2_capability *capability) |
| 336 | { |
| 337 | struct si476x_radio *radio = video_drvdata(file); |
| 338 | |
| 339 | strlcpy(capability->driver, radio->v4l2dev.name, |
| 340 | sizeof(capability->driver)); |
| 341 | strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card)); |
| 342 | snprintf(capability->bus_info, sizeof(capability->bus_info), |
| 343 | "platform:%s", radio->v4l2dev.name); |
| 344 | |
| 345 | capability->device_caps = V4L2_CAP_TUNER |
| 346 | | V4L2_CAP_RADIO |
| 347 | | V4L2_CAP_HW_FREQ_SEEK; |
| 348 | |
| 349 | si476x_core_lock(radio->core); |
| 350 | if (!si476x_core_is_a_secondary_tuner(radio->core)) |
| 351 | capability->device_caps |= V4L2_CAP_RDS_CAPTURE |
| 352 | | V4L2_CAP_READWRITE; |
| 353 | si476x_core_unlock(radio->core); |
| 354 | |
| 355 | capability->capabilities = capability->device_caps |
| 356 | | V4L2_CAP_DEVICE_CAPS; |
| 357 | return 0; |
| 358 | } |
| 359 | |
| 360 | static int si476x_radio_enum_freq_bands(struct file *file, void *priv, |
| 361 | struct v4l2_frequency_band *band) |
| 362 | { |
| 363 | int err; |
| 364 | struct si476x_radio *radio = video_drvdata(file); |
| 365 | |
| 366 | if (band->tuner != 0) |
| 367 | return -EINVAL; |
| 368 | |
| 369 | switch (radio->core->chip_id) { |
| 370 | /* AM/FM tuners -- all bands are supported */ |
| 371 | case SI476X_CHIP_SI4761: |
| 372 | case SI476X_CHIP_SI4764: |
| 373 | if (band->index < ARRAY_SIZE(si476x_bands)) { |
| 374 | *band = si476x_bands[band->index]; |
| 375 | err = 0; |
| 376 | } else { |
| 377 | err = -EINVAL; |
| 378 | } |
| 379 | break; |
| 380 | /* FM companion tuner chips -- only FM bands are |
| 381 | * supported */ |
| 382 | case SI476X_CHIP_SI4768: |
| 383 | if (band->index == SI476X_BAND_FM) { |
| 384 | *band = si476x_bands[band->index]; |
| 385 | err = 0; |
| 386 | } else { |
| 387 | err = -EINVAL; |
| 388 | } |
| 389 | break; |
| 390 | default: |
| 391 | err = -EINVAL; |
| 392 | } |
| 393 | |
| 394 | return err; |
| 395 | } |
| 396 | |
| 397 | static int si476x_radio_g_tuner(struct file *file, void *priv, |
| 398 | struct v4l2_tuner *tuner) |
| 399 | { |
| 400 | int err; |
| 401 | struct si476x_rsq_status_report report; |
| 402 | struct si476x_radio *radio = video_drvdata(file); |
| 403 | |
| 404 | struct si476x_rsq_status_args args = { |
| 405 | .primary = false, |
| 406 | .rsqack = false, |
| 407 | .attune = false, |
| 408 | .cancel = false, |
| 409 | .stcack = false, |
| 410 | }; |
| 411 | |
| 412 | if (tuner->index != 0) |
| 413 | return -EINVAL; |
| 414 | |
| 415 | tuner->type = V4L2_TUNER_RADIO; |
| 416 | tuner->capability = V4L2_TUNER_CAP_LOW /* Measure frequencies |
| 417 | * in multiples of |
| 418 | * 62.5 Hz */ |
| 419 | | V4L2_TUNER_CAP_STEREO |
| 420 | | V4L2_TUNER_CAP_HWSEEK_BOUNDED |
| 421 | | V4L2_TUNER_CAP_HWSEEK_WRAP |
| 422 | | V4L2_TUNER_CAP_HWSEEK_PROG_LIM; |
| 423 | |
| 424 | si476x_core_lock(radio->core); |
| 425 | |
| 426 | if (si476x_core_is_a_secondary_tuner(radio->core)) { |
| 427 | strlcpy(tuner->name, "FM (secondary)", sizeof(tuner->name)); |
| 428 | tuner->rxsubchans = 0; |
| 429 | tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow; |
| 430 | } else if (si476x_core_has_am(radio->core)) { |
| 431 | if (si476x_core_is_a_primary_tuner(radio->core)) |
| 432 | strlcpy(tuner->name, "AM/FM (primary)", |
| 433 | sizeof(tuner->name)); |
| 434 | else |
| 435 | strlcpy(tuner->name, "AM/FM", sizeof(tuner->name)); |
| 436 | |
| 437 | tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO |
| 438 | | V4L2_TUNER_SUB_RDS; |
| 439 | tuner->capability |= V4L2_TUNER_CAP_RDS |
| 440 | | V4L2_TUNER_CAP_RDS_BLOCK_IO |
| 441 | | V4L2_TUNER_CAP_FREQ_BANDS; |
| 442 | |
| 443 | tuner->rangelow = si476x_bands[SI476X_BAND_AM].rangelow; |
| 444 | } else { |
| 445 | strlcpy(tuner->name, "FM", sizeof(tuner->name)); |
| 446 | tuner->rxsubchans = V4L2_TUNER_SUB_RDS; |
| 447 | tuner->capability |= V4L2_TUNER_CAP_RDS |
| 448 | | V4L2_TUNER_CAP_RDS_BLOCK_IO |
| 449 | | V4L2_TUNER_CAP_FREQ_BANDS; |
| 450 | tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow; |
| 451 | } |
| 452 | |
| 453 | tuner->audmode = radio->audmode; |
| 454 | |
| 455 | tuner->afc = 1; |
| 456 | tuner->rangehigh = si476x_bands[SI476X_BAND_FM].rangehigh; |
| 457 | |
| 458 | err = radio->ops->rsq_status(radio->core, |
| 459 | &args, &report); |
| 460 | if (err < 0) { |
| 461 | tuner->signal = 0; |
| 462 | } else { |
| 463 | /* |
| 464 | * tuner->signal value range: 0x0000 .. 0xFFFF, |
| 465 | * report.rssi: -128 .. 127 |
| 466 | */ |
| 467 | tuner->signal = (report.rssi + 128) * 257; |
| 468 | } |
| 469 | si476x_core_unlock(radio->core); |
| 470 | |
| 471 | return err; |
| 472 | } |
| 473 | |
| 474 | static int si476x_radio_s_tuner(struct file *file, void *priv, |
| 475 | const struct v4l2_tuner *tuner) |
| 476 | { |
| 477 | struct si476x_radio *radio = video_drvdata(file); |
| 478 | |
| 479 | if (tuner->index != 0) |
| 480 | return -EINVAL; |
| 481 | |
| 482 | if (tuner->audmode == V4L2_TUNER_MODE_MONO || |
| 483 | tuner->audmode == V4L2_TUNER_MODE_STEREO) |
| 484 | radio->audmode = tuner->audmode; |
| 485 | else |
| 486 | radio->audmode = V4L2_TUNER_MODE_STEREO; |
| 487 | |
| 488 | return 0; |
| 489 | } |
| 490 | |
| 491 | static int si476x_radio_init_vtable(struct si476x_radio *radio, |
| 492 | enum si476x_func func) |
| 493 | { |
| 494 | static const struct si476x_radio_ops fm_ops = { |
| 495 | .tune_freq = si476x_core_cmd_fm_tune_freq, |
| 496 | .seek_start = si476x_core_cmd_fm_seek_start, |
| 497 | .rsq_status = si476x_core_cmd_fm_rsq_status, |
| 498 | .rds_blckcnt = si476x_core_cmd_fm_rds_blockcount, |
| 499 | .phase_diversity = si476x_core_cmd_fm_phase_diversity, |
| 500 | .phase_div_status = si476x_core_cmd_fm_phase_div_status, |
| 501 | .acf_status = si476x_core_cmd_fm_acf_status, |
| 502 | .agc_status = si476x_core_cmd_agc_status, |
| 503 | }; |
| 504 | |
| 505 | static const struct si476x_radio_ops am_ops = { |
| 506 | .tune_freq = si476x_core_cmd_am_tune_freq, |
| 507 | .seek_start = si476x_core_cmd_am_seek_start, |
| 508 | .rsq_status = si476x_core_cmd_am_rsq_status, |
| 509 | .rds_blckcnt = NULL, |
| 510 | .phase_diversity = NULL, |
| 511 | .phase_div_status = NULL, |
| 512 | .acf_status = si476x_core_cmd_am_acf_status, |
| 513 | .agc_status = NULL, |
| 514 | }; |
| 515 | |
| 516 | switch (func) { |
| 517 | case SI476X_FUNC_FM_RECEIVER: |
| 518 | radio->ops = &fm_ops; |
| 519 | return 0; |
| 520 | |
| 521 | case SI476X_FUNC_AM_RECEIVER: |
| 522 | radio->ops = &am_ops; |
| 523 | return 0; |
| 524 | default: |
| 525 | WARN(1, "Unexpected tuner function value\n"); |
| 526 | return -EINVAL; |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | static int si476x_radio_pretune(struct si476x_radio *radio, |
| 531 | enum si476x_func func) |
| 532 | { |
| 533 | int retval; |
| 534 | |
| 535 | struct si476x_tune_freq_args args = { |
| 536 | .zifsr = false, |
| 537 | .hd = false, |
| 538 | .injside = SI476X_INJSIDE_AUTO, |
| 539 | .tunemode = SI476X_TM_VALIDATED_NORMAL_TUNE, |
| 540 | .smoothmetrics = SI476X_SM_INITIALIZE_AUDIO, |
| 541 | .antcap = 0, |
| 542 | }; |
| 543 | |
| 544 | switch (func) { |
| 545 | case SI476X_FUNC_FM_RECEIVER: |
| 546 | args.freq = v4l2_to_si476x(radio->core, |
| 547 | 92 * FREQ_MUL); |
| 548 | retval = radio->ops->tune_freq(radio->core, &args); |
| 549 | break; |
| 550 | case SI476X_FUNC_AM_RECEIVER: |
| 551 | args.freq = v4l2_to_si476x(radio->core, |
| 552 | 0.6 * FREQ_MUL); |
| 553 | retval = radio->ops->tune_freq(radio->core, &args); |
| 554 | break; |
| 555 | default: |
| 556 | WARN(1, "Unexpected tuner function value\n"); |
| 557 | retval = -EINVAL; |
| 558 | } |
| 559 | |
| 560 | return retval; |
| 561 | } |
| 562 | static int si476x_radio_do_post_powerup_init(struct si476x_radio *radio, |
| 563 | enum si476x_func func) |
| 564 | { |
| 565 | int err; |
| 566 | |
| 567 | /* regcache_mark_dirty(radio->core->regmap); */ |
| 568 | err = regcache_sync_region(radio->core->regmap, |
| 569 | SI476X_PROP_DIGITAL_IO_INPUT_SAMPLE_RATE, |
| 570 | SI476X_PROP_DIGITAL_IO_OUTPUT_FORMAT); |
| 571 | if (err < 0) |
| 572 | return err; |
| 573 | |
| 574 | err = regcache_sync_region(radio->core->regmap, |
| 575 | SI476X_PROP_AUDIO_DEEMPHASIS, |
| 576 | SI476X_PROP_AUDIO_PWR_LINE_FILTER); |
| 577 | if (err < 0) |
| 578 | return err; |
| 579 | |
| 580 | err = regcache_sync_region(radio->core->regmap, |
| 581 | SI476X_PROP_INT_CTL_ENABLE, |
| 582 | SI476X_PROP_INT_CTL_ENABLE); |
| 583 | if (err < 0) |
| 584 | return err; |
| 585 | |
| 586 | /* |
| 587 | * Is there any point in restoring SNR and the like |
| 588 | * when switching between AM/FM? |
| 589 | */ |
| 590 | err = regcache_sync_region(radio->core->regmap, |
| 591 | SI476X_PROP_VALID_MAX_TUNE_ERROR, |
| 592 | SI476X_PROP_VALID_MAX_TUNE_ERROR); |
| 593 | if (err < 0) |
| 594 | return err; |
| 595 | |
| 596 | err = regcache_sync_region(radio->core->regmap, |
| 597 | SI476X_PROP_VALID_SNR_THRESHOLD, |
| 598 | SI476X_PROP_VALID_RSSI_THRESHOLD); |
| 599 | if (err < 0) |
| 600 | return err; |
| 601 | |
| 602 | if (func == SI476X_FUNC_FM_RECEIVER) { |
| 603 | if (si476x_core_has_diversity(radio->core)) { |
| 604 | err = si476x_core_cmd_fm_phase_diversity(radio->core, |
| 605 | radio->core->diversity_mode); |
| 606 | if (err < 0) |
| 607 | return err; |
| 608 | } |
| 609 | |
| 610 | err = regcache_sync_region(radio->core->regmap, |
| 611 | SI476X_PROP_FM_RDS_INTERRUPT_SOURCE, |
| 612 | SI476X_PROP_FM_RDS_CONFIG); |
| 613 | if (err < 0) |
| 614 | return err; |
| 615 | } |
| 616 | |
| 617 | return si476x_radio_init_vtable(radio, func); |
| 618 | |
| 619 | } |
| 620 | |
| 621 | static int si476x_radio_change_func(struct si476x_radio *radio, |
| 622 | enum si476x_func func) |
| 623 | { |
| 624 | int err; |
| 625 | bool soft; |
| 626 | /* |
| 627 | * Since power/up down is a very time consuming operation, |
| 628 | * try to avoid doing it if the requested mode matches the one |
| 629 | * the tuner is in |
| 630 | */ |
| 631 | if (func == radio->core->power_up_parameters.func) |
| 632 | return 0; |
| 633 | |
| 634 | soft = true; |
| 635 | err = si476x_core_stop(radio->core, soft); |
| 636 | if (err < 0) { |
| 637 | /* |
| 638 | * OK, if the chip does not want to play nice let's |
| 639 | * try to reset it in more brutal way |
| 640 | */ |
| 641 | soft = false; |
| 642 | err = si476x_core_stop(radio->core, soft); |
| 643 | if (err < 0) |
| 644 | return err; |
| 645 | } |
| 646 | /* |
| 647 | Set the desired radio tuner function |
| 648 | */ |
| 649 | radio->core->power_up_parameters.func = func; |
| 650 | |
| 651 | err = si476x_core_start(radio->core, soft); |
| 652 | if (err < 0) |
| 653 | return err; |
| 654 | |
| 655 | /* |
| 656 | * No need to do the rest of manipulations for the bootlader |
| 657 | * mode |
| 658 | */ |
| 659 | if (func != SI476X_FUNC_FM_RECEIVER && |
| 660 | func != SI476X_FUNC_AM_RECEIVER) |
| 661 | return err; |
| 662 | |
| 663 | return si476x_radio_do_post_powerup_init(radio, func); |
| 664 | } |
| 665 | |
| 666 | static int si476x_radio_g_frequency(struct file *file, void *priv, |
| 667 | struct v4l2_frequency *f) |
| 668 | { |
| 669 | int err; |
| 670 | struct si476x_radio *radio = video_drvdata(file); |
| 671 | |
| 672 | if (f->tuner != 0 || |
| 673 | f->type != V4L2_TUNER_RADIO) |
| 674 | return -EINVAL; |
| 675 | |
| 676 | si476x_core_lock(radio->core); |
| 677 | |
| 678 | if (radio->ops->rsq_status) { |
| 679 | struct si476x_rsq_status_report report; |
| 680 | struct si476x_rsq_status_args args = { |
| 681 | .primary = false, |
| 682 | .rsqack = false, |
| 683 | .attune = true, |
| 684 | .cancel = false, |
| 685 | .stcack = false, |
| 686 | }; |
| 687 | |
| 688 | err = radio->ops->rsq_status(radio->core, &args, &report); |
| 689 | if (!err) |
| 690 | f->frequency = si476x_to_v4l2(radio->core, |
| 691 | report.readfreq); |
| 692 | } else { |
| 693 | err = -EINVAL; |
| 694 | } |
| 695 | |
| 696 | si476x_core_unlock(radio->core); |
| 697 | |
| 698 | return err; |
| 699 | } |
| 700 | |
| 701 | static int si476x_radio_s_frequency(struct file *file, void *priv, |
| 702 | const struct v4l2_frequency *f) |
| 703 | { |
| 704 | int err; |
| 705 | u32 freq = f->frequency; |
| 706 | struct si476x_tune_freq_args args; |
| 707 | struct si476x_radio *radio = video_drvdata(file); |
| 708 | |
| 709 | const u32 midrange = (si476x_bands[SI476X_BAND_AM].rangehigh + |
| 710 | si476x_bands[SI476X_BAND_FM].rangelow) / 2; |
| 711 | const int band = (freq > midrange) ? |
| 712 | SI476X_BAND_FM : SI476X_BAND_AM; |
| 713 | const enum si476x_func func = (band == SI476X_BAND_AM) ? |
| 714 | SI476X_FUNC_AM_RECEIVER : SI476X_FUNC_FM_RECEIVER; |
| 715 | |
| 716 | if (f->tuner != 0 || |
| 717 | f->type != V4L2_TUNER_RADIO) |
| 718 | return -EINVAL; |
| 719 | |
| 720 | si476x_core_lock(radio->core); |
| 721 | |
| 722 | freq = clamp(freq, |
| 723 | si476x_bands[band].rangelow, |
| 724 | si476x_bands[band].rangehigh); |
| 725 | |
| 726 | if (si476x_radio_freq_is_inside_of_the_band(freq, |
| 727 | SI476X_BAND_AM) && |
| 728 | (!si476x_core_has_am(radio->core) || |
| 729 | si476x_core_is_a_secondary_tuner(radio->core))) { |
| 730 | err = -EINVAL; |
| 731 | goto unlock; |
| 732 | } |
| 733 | |
| 734 | err = si476x_radio_change_func(radio, func); |
| 735 | if (err < 0) |
| 736 | goto unlock; |
| 737 | |
| 738 | args.zifsr = false; |
| 739 | args.hd = false; |
| 740 | args.injside = SI476X_INJSIDE_AUTO; |
| 741 | args.freq = v4l2_to_si476x(radio->core, freq); |
| 742 | args.tunemode = SI476X_TM_VALIDATED_NORMAL_TUNE; |
| 743 | args.smoothmetrics = SI476X_SM_INITIALIZE_AUDIO; |
| 744 | args.antcap = 0; |
| 745 | |
| 746 | err = radio->ops->tune_freq(radio->core, &args); |
| 747 | |
| 748 | unlock: |
| 749 | si476x_core_unlock(radio->core); |
| 750 | return err; |
| 751 | } |
| 752 | |
| 753 | static int si476x_radio_s_hw_freq_seek(struct file *file, void *priv, |
| 754 | const struct v4l2_hw_freq_seek *seek) |
| 755 | { |
| 756 | int err; |
| 757 | enum si476x_func func; |
| 758 | u32 rangelow, rangehigh; |
| 759 | struct si476x_radio *radio = video_drvdata(file); |
| 760 | |
| 761 | if (file->f_flags & O_NONBLOCK) |
| 762 | return -EAGAIN; |
| 763 | |
| 764 | if (seek->tuner != 0 || |
| 765 | seek->type != V4L2_TUNER_RADIO) |
| 766 | return -EINVAL; |
| 767 | |
| 768 | si476x_core_lock(radio->core); |
| 769 | |
| 770 | if (!seek->rangelow) { |
| 771 | err = regmap_read(radio->core->regmap, |
| 772 | SI476X_PROP_SEEK_BAND_BOTTOM, |
| 773 | &rangelow); |
| 774 | if (!err) |
| 775 | rangelow = si476x_to_v4l2(radio->core, rangelow); |
| 776 | else |
| 777 | goto unlock; |
| 778 | } |
| 779 | if (!seek->rangehigh) { |
| 780 | err = regmap_read(radio->core->regmap, |
| 781 | SI476X_PROP_SEEK_BAND_TOP, |
| 782 | &rangehigh); |
| 783 | if (!err) |
| 784 | rangehigh = si476x_to_v4l2(radio->core, rangehigh); |
| 785 | else |
| 786 | goto unlock; |
| 787 | } |
| 788 | |
| 789 | if (rangelow > rangehigh) { |
| 790 | err = -EINVAL; |
| 791 | goto unlock; |
| 792 | } |
| 793 | |
| 794 | if (si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh, |
| 795 | SI476X_BAND_FM)) { |
| 796 | func = SI476X_FUNC_FM_RECEIVER; |
| 797 | |
| 798 | } else if (si476x_core_has_am(radio->core) && |
| 799 | si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh, |
| 800 | SI476X_BAND_AM)) { |
| 801 | func = SI476X_FUNC_AM_RECEIVER; |
| 802 | } else { |
| 803 | err = -EINVAL; |
| 804 | goto unlock; |
| 805 | } |
| 806 | |
| 807 | err = si476x_radio_change_func(radio, func); |
| 808 | if (err < 0) |
| 809 | goto unlock; |
| 810 | |
| 811 | if (seek->rangehigh) { |
| 812 | err = regmap_write(radio->core->regmap, |
| 813 | SI476X_PROP_SEEK_BAND_TOP, |
| 814 | v4l2_to_si476x(radio->core, |
| 815 | seek->rangehigh)); |
| 816 | if (err) |
| 817 | goto unlock; |
| 818 | } |
| 819 | if (seek->rangelow) { |
| 820 | err = regmap_write(radio->core->regmap, |
| 821 | SI476X_PROP_SEEK_BAND_BOTTOM, |
| 822 | v4l2_to_si476x(radio->core, |
| 823 | seek->rangelow)); |
| 824 | if (err) |
| 825 | goto unlock; |
| 826 | } |
| 827 | if (seek->spacing) { |
| 828 | err = regmap_write(radio->core->regmap, |
| 829 | SI476X_PROP_SEEK_FREQUENCY_SPACING, |
| 830 | v4l2_to_si476x(radio->core, |
| 831 | seek->spacing)); |
| 832 | if (err) |
| 833 | goto unlock; |
| 834 | } |
| 835 | |
| 836 | err = radio->ops->seek_start(radio->core, |
| 837 | seek->seek_upward, |
| 838 | seek->wrap_around); |
| 839 | unlock: |
| 840 | si476x_core_unlock(radio->core); |
| 841 | |
| 842 | |
| 843 | |
| 844 | return err; |
| 845 | } |
| 846 | |
| 847 | static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl) |
| 848 | { |
| 849 | int retval; |
| 850 | struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler); |
| 851 | |
| 852 | si476x_core_lock(radio->core); |
| 853 | |
| 854 | switch (ctrl->id) { |
| 855 | case V4L2_CID_SI476X_INTERCHIP_LINK: |
| 856 | if (si476x_core_has_diversity(radio->core)) { |
| 857 | if (radio->ops->phase_diversity) { |
| 858 | retval = radio->ops->phase_div_status(radio->core); |
| 859 | if (retval < 0) |
| 860 | break; |
| 861 | |
| 862 | ctrl->val = !!SI476X_PHDIV_STATUS_LINK_LOCKED(retval); |
| 863 | retval = 0; |
| 864 | break; |
| 865 | } else { |
| 866 | retval = -ENOTTY; |
| 867 | break; |
| 868 | } |
| 869 | } |
| 870 | retval = -EINVAL; |
| 871 | break; |
| 872 | default: |
| 873 | retval = -EINVAL; |
| 874 | break; |
| 875 | } |
| 876 | si476x_core_unlock(radio->core); |
| 877 | return retval; |
| 878 | |
| 879 | } |
| 880 | |
| 881 | static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl) |
| 882 | { |
| 883 | int retval; |
| 884 | enum si476x_phase_diversity_mode mode; |
| 885 | struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler); |
| 886 | |
| 887 | si476x_core_lock(radio->core); |
| 888 | |
| 889 | switch (ctrl->id) { |
| 890 | case V4L2_CID_SI476X_HARMONICS_COUNT: |
| 891 | retval = regmap_update_bits(radio->core->regmap, |
| 892 | SI476X_PROP_AUDIO_PWR_LINE_FILTER, |
| 893 | SI476X_PROP_PWR_HARMONICS_MASK, |
| 894 | ctrl->val); |
| 895 | break; |
| 896 | case V4L2_CID_POWER_LINE_FREQUENCY: |
| 897 | switch (ctrl->val) { |
| 898 | case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED: |
| 899 | retval = regmap_update_bits(radio->core->regmap, |
| 900 | SI476X_PROP_AUDIO_PWR_LINE_FILTER, |
| 901 | SI476X_PROP_PWR_ENABLE_MASK, |
| 902 | 0); |
| 903 | break; |
| 904 | case V4L2_CID_POWER_LINE_FREQUENCY_50HZ: |
| 905 | retval = regmap_update_bits(radio->core->regmap, |
| 906 | SI476X_PROP_AUDIO_PWR_LINE_FILTER, |
| 907 | SI476X_PROP_PWR_GRID_MASK, |
| 908 | SI476X_PROP_PWR_GRID_50HZ); |
| 909 | break; |
| 910 | case V4L2_CID_POWER_LINE_FREQUENCY_60HZ: |
| 911 | retval = regmap_update_bits(radio->core->regmap, |
| 912 | SI476X_PROP_AUDIO_PWR_LINE_FILTER, |
| 913 | SI476X_PROP_PWR_GRID_MASK, |
| 914 | SI476X_PROP_PWR_GRID_60HZ); |
| 915 | break; |
| 916 | default: |
| 917 | retval = -EINVAL; |
| 918 | break; |
| 919 | } |
| 920 | break; |
| 921 | case V4L2_CID_SI476X_RSSI_THRESHOLD: |
| 922 | retval = regmap_write(radio->core->regmap, |
| 923 | SI476X_PROP_VALID_RSSI_THRESHOLD, |
| 924 | ctrl->val); |
| 925 | break; |
| 926 | case V4L2_CID_SI476X_SNR_THRESHOLD: |
| 927 | retval = regmap_write(radio->core->regmap, |
| 928 | SI476X_PROP_VALID_SNR_THRESHOLD, |
| 929 | ctrl->val); |
| 930 | break; |
| 931 | case V4L2_CID_SI476X_MAX_TUNE_ERROR: |
| 932 | retval = regmap_write(radio->core->regmap, |
| 933 | SI476X_PROP_VALID_MAX_TUNE_ERROR, |
| 934 | ctrl->val); |
| 935 | break; |
| 936 | case V4L2_CID_RDS_RECEPTION: |
| 937 | /* |
| 938 | * It looks like RDS related properties are |
| 939 | * inaccesable when tuner is in AM mode, so cache the |
| 940 | * changes |
| 941 | */ |
| 942 | if (si476x_core_is_in_am_receiver_mode(radio->core)) |
| 943 | regcache_cache_only(radio->core->regmap, true); |
| 944 | |
| 945 | if (ctrl->val) { |
| 946 | retval = regmap_write(radio->core->regmap, |
| 947 | SI476X_PROP_FM_RDS_INTERRUPT_FIFO_COUNT, |
| 948 | radio->core->rds_fifo_depth); |
| 949 | if (retval < 0) |
| 950 | break; |
| 951 | |
| 952 | if (radio->core->client->irq) { |
| 953 | retval = regmap_write(radio->core->regmap, |
| 954 | SI476X_PROP_FM_RDS_INTERRUPT_SOURCE, |
| 955 | SI476X_RDSRECV); |
| 956 | if (retval < 0) |
| 957 | break; |
| 958 | } |
| 959 | |
| 960 | /* Drain RDS FIFO before enabling RDS processing */ |
| 961 | retval = si476x_core_cmd_fm_rds_status(radio->core, |
| 962 | false, |
| 963 | true, |
| 964 | true, |
| 965 | NULL); |
| 966 | if (retval < 0) |
| 967 | break; |
| 968 | |
| 969 | retval = regmap_update_bits(radio->core->regmap, |
| 970 | SI476X_PROP_FM_RDS_CONFIG, |
| 971 | SI476X_PROP_RDSEN_MASK, |
| 972 | SI476X_PROP_RDSEN); |
| 973 | } else { |
| 974 | retval = regmap_update_bits(radio->core->regmap, |
| 975 | SI476X_PROP_FM_RDS_CONFIG, |
| 976 | SI476X_PROP_RDSEN_MASK, |
| 977 | !SI476X_PROP_RDSEN); |
| 978 | } |
| 979 | |
| 980 | if (si476x_core_is_in_am_receiver_mode(radio->core)) |
| 981 | regcache_cache_only(radio->core->regmap, false); |
| 982 | break; |
| 983 | case V4L2_CID_TUNE_DEEMPHASIS: |
| 984 | retval = regmap_write(radio->core->regmap, |
| 985 | SI476X_PROP_AUDIO_DEEMPHASIS, |
| 986 | ctrl->val); |
| 987 | break; |
| 988 | |
| 989 | case V4L2_CID_SI476X_DIVERSITY_MODE: |
| 990 | mode = si476x_phase_diversity_idx_to_mode(ctrl->val); |
| 991 | |
| 992 | if (mode == radio->core->diversity_mode) { |
| 993 | retval = 0; |
| 994 | break; |
| 995 | } |
| 996 | |
| 997 | if (si476x_core_is_in_am_receiver_mode(radio->core)) { |
| 998 | /* |
| 999 | * Diversity cannot be configured while tuner |
| 1000 | * is in AM mode so save the changes and carry on. |
| 1001 | */ |
| 1002 | radio->core->diversity_mode = mode; |
| 1003 | retval = 0; |
| 1004 | } else { |
| 1005 | retval = radio->ops->phase_diversity(radio->core, mode); |
| 1006 | if (!retval) |
| 1007 | radio->core->diversity_mode = mode; |
| 1008 | } |
| 1009 | break; |
| 1010 | |
| 1011 | default: |
| 1012 | retval = -EINVAL; |
| 1013 | break; |
| 1014 | } |
| 1015 | |
| 1016 | si476x_core_unlock(radio->core); |
| 1017 | |
| 1018 | return retval; |
| 1019 | } |
| 1020 | |
| 1021 | static int si476x_radio_g_chip_ident(struct file *file, void *fh, |
| 1022 | struct v4l2_dbg_chip_ident *chip) |
| 1023 | { |
| 1024 | if (chip->match.type == V4L2_CHIP_MATCH_HOST && |
| 1025 | v4l2_chip_match_host(&chip->match)) |
| 1026 | return 0; |
| 1027 | return -EINVAL; |
| 1028 | } |
| 1029 | |
| 1030 | |
| 1031 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
| 1032 | static int si476x_radio_g_register(struct file *file, void *fh, |
| 1033 | struct v4l2_dbg_register *reg) |
| 1034 | { |
| 1035 | int err; |
| 1036 | unsigned int value; |
| 1037 | struct si476x_radio *radio = video_drvdata(file); |
| 1038 | |
| 1039 | si476x_core_lock(radio->core); |
| 1040 | reg->size = 2; |
| 1041 | err = regmap_read(radio->core->regmap, |
| 1042 | (unsigned int)reg->reg, &value); |
| 1043 | reg->val = value; |
| 1044 | si476x_core_unlock(radio->core); |
| 1045 | |
| 1046 | return err; |
| 1047 | } |
| 1048 | static int si476x_radio_s_register(struct file *file, void *fh, |
| 1049 | const struct v4l2_dbg_register *reg) |
| 1050 | { |
| 1051 | |
| 1052 | int err; |
| 1053 | struct si476x_radio *radio = video_drvdata(file); |
| 1054 | |
| 1055 | si476x_core_lock(radio->core); |
| 1056 | err = regmap_write(radio->core->regmap, |
| 1057 | (unsigned int)reg->reg, |
| 1058 | (unsigned int)reg->val); |
| 1059 | si476x_core_unlock(radio->core); |
| 1060 | |
| 1061 | return err; |
| 1062 | } |
| 1063 | #endif |
| 1064 | |
| 1065 | static int si476x_radio_fops_open(struct file *file) |
| 1066 | { |
| 1067 | struct si476x_radio *radio = video_drvdata(file); |
| 1068 | int err; |
| 1069 | |
| 1070 | err = v4l2_fh_open(file); |
| 1071 | if (err) |
| 1072 | return err; |
| 1073 | |
| 1074 | if (v4l2_fh_is_singular_file(file)) { |
| 1075 | si476x_core_lock(radio->core); |
| 1076 | err = si476x_core_set_power_state(radio->core, |
| 1077 | SI476X_POWER_UP_FULL); |
| 1078 | if (err < 0) |
| 1079 | goto done; |
| 1080 | |
| 1081 | err = si476x_radio_do_post_powerup_init(radio, |
| 1082 | radio->core->power_up_parameters.func); |
| 1083 | if (err < 0) |
| 1084 | goto power_down; |
| 1085 | |
| 1086 | err = si476x_radio_pretune(radio, |
| 1087 | radio->core->power_up_parameters.func); |
| 1088 | if (err < 0) |
| 1089 | goto power_down; |
| 1090 | |
| 1091 | si476x_core_unlock(radio->core); |
| 1092 | /*Must be done after si476x_core_unlock to prevent a deadlock*/ |
| 1093 | v4l2_ctrl_handler_setup(&radio->ctrl_handler); |
| 1094 | } |
| 1095 | |
| 1096 | return err; |
| 1097 | |
| 1098 | power_down: |
| 1099 | si476x_core_set_power_state(radio->core, |
| 1100 | SI476X_POWER_DOWN); |
| 1101 | done: |
| 1102 | si476x_core_unlock(radio->core); |
| 1103 | v4l2_fh_release(file); |
| 1104 | |
| 1105 | return err; |
| 1106 | } |
| 1107 | |
| 1108 | static int si476x_radio_fops_release(struct file *file) |
| 1109 | { |
| 1110 | int err; |
| 1111 | struct si476x_radio *radio = video_drvdata(file); |
| 1112 | |
| 1113 | if (v4l2_fh_is_singular_file(file) && |
| 1114 | atomic_read(&radio->core->is_alive)) |
| 1115 | si476x_core_set_power_state(radio->core, |
| 1116 | SI476X_POWER_DOWN); |
| 1117 | |
| 1118 | err = v4l2_fh_release(file); |
| 1119 | |
| 1120 | return err; |
| 1121 | } |
| 1122 | |
| 1123 | static ssize_t si476x_radio_fops_read(struct file *file, char __user *buf, |
| 1124 | size_t count, loff_t *ppos) |
| 1125 | { |
| 1126 | ssize_t rval; |
| 1127 | size_t fifo_len; |
| 1128 | unsigned int copied; |
| 1129 | |
| 1130 | struct si476x_radio *radio = video_drvdata(file); |
| 1131 | |
| 1132 | /* block if no new data available */ |
| 1133 | if (kfifo_is_empty(&radio->core->rds_fifo)) { |
| 1134 | if (file->f_flags & O_NONBLOCK) |
| 1135 | return -EWOULDBLOCK; |
| 1136 | |
| 1137 | rval = wait_event_interruptible(radio->core->rds_read_queue, |
| 1138 | (!kfifo_is_empty(&radio->core->rds_fifo) || |
| 1139 | !atomic_read(&radio->core->is_alive))); |
| 1140 | if (rval < 0) |
| 1141 | return -EINTR; |
| 1142 | |
| 1143 | if (!atomic_read(&radio->core->is_alive)) |
| 1144 | return -ENODEV; |
| 1145 | } |
| 1146 | |
| 1147 | fifo_len = kfifo_len(&radio->core->rds_fifo); |
| 1148 | |
| 1149 | if (kfifo_to_user(&radio->core->rds_fifo, buf, |
| 1150 | min(fifo_len, count), |
| 1151 | &copied) != 0) { |
| 1152 | dev_warn(&radio->videodev.dev, |
| 1153 | "Error during FIFO to userspace copy\n"); |
| 1154 | rval = -EIO; |
| 1155 | } else { |
| 1156 | rval = (ssize_t)copied; |
| 1157 | } |
| 1158 | |
| 1159 | return rval; |
| 1160 | } |
| 1161 | |
| 1162 | static unsigned int si476x_radio_fops_poll(struct file *file, |
| 1163 | struct poll_table_struct *pts) |
| 1164 | { |
| 1165 | struct si476x_radio *radio = video_drvdata(file); |
| 1166 | unsigned long req_events = poll_requested_events(pts); |
| 1167 | unsigned int err = v4l2_ctrl_poll(file, pts); |
| 1168 | |
| 1169 | if (req_events & (POLLIN | POLLRDNORM)) { |
| 1170 | if (atomic_read(&radio->core->is_alive)) |
| 1171 | poll_wait(file, &radio->core->rds_read_queue, pts); |
| 1172 | |
| 1173 | if (!atomic_read(&radio->core->is_alive)) |
| 1174 | err = POLLHUP; |
| 1175 | |
| 1176 | if (!kfifo_is_empty(&radio->core->rds_fifo)) |
| 1177 | err = POLLIN | POLLRDNORM; |
| 1178 | } |
| 1179 | |
| 1180 | return err; |
| 1181 | } |
| 1182 | |
| 1183 | static const struct v4l2_file_operations si476x_fops = { |
| 1184 | .owner = THIS_MODULE, |
| 1185 | .read = si476x_radio_fops_read, |
| 1186 | .poll = si476x_radio_fops_poll, |
| 1187 | .unlocked_ioctl = video_ioctl2, |
| 1188 | .open = si476x_radio_fops_open, |
| 1189 | .release = si476x_radio_fops_release, |
| 1190 | }; |
| 1191 | |
| 1192 | |
| 1193 | static const struct v4l2_ioctl_ops si4761_ioctl_ops = { |
| 1194 | .vidioc_querycap = si476x_radio_querycap, |
| 1195 | .vidioc_g_tuner = si476x_radio_g_tuner, |
| 1196 | .vidioc_s_tuner = si476x_radio_s_tuner, |
| 1197 | |
| 1198 | .vidioc_g_frequency = si476x_radio_g_frequency, |
| 1199 | .vidioc_s_frequency = si476x_radio_s_frequency, |
| 1200 | .vidioc_s_hw_freq_seek = si476x_radio_s_hw_freq_seek, |
| 1201 | .vidioc_enum_freq_bands = si476x_radio_enum_freq_bands, |
| 1202 | |
| 1203 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
| 1204 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
| 1205 | |
| 1206 | .vidioc_g_chip_ident = si476x_radio_g_chip_ident, |
| 1207 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
| 1208 | .vidioc_g_register = si476x_radio_g_register, |
| 1209 | .vidioc_s_register = si476x_radio_s_register, |
| 1210 | #endif |
| 1211 | }; |
| 1212 | |
| 1213 | |
| 1214 | static const struct video_device si476x_viddev_template = { |
| 1215 | .fops = &si476x_fops, |
| 1216 | .name = DRIVER_NAME, |
| 1217 | .release = video_device_release_empty, |
| 1218 | }; |
| 1219 | |
| 1220 | |
| 1221 | |
| 1222 | static ssize_t si476x_radio_read_acf_blob(struct file *file, |
| 1223 | char __user *user_buf, |
| 1224 | size_t count, loff_t *ppos) |
| 1225 | { |
| 1226 | int err; |
| 1227 | struct si476x_radio *radio = file->private_data; |
| 1228 | struct si476x_acf_status_report report; |
| 1229 | |
| 1230 | si476x_core_lock(radio->core); |
| 1231 | if (radio->ops->acf_status) |
| 1232 | err = radio->ops->acf_status(radio->core, &report); |
| 1233 | else |
| 1234 | err = -ENOENT; |
| 1235 | si476x_core_unlock(radio->core); |
| 1236 | |
| 1237 | if (err < 0) |
| 1238 | return err; |
| 1239 | |
| 1240 | return simple_read_from_buffer(user_buf, count, ppos, &report, |
| 1241 | sizeof(report)); |
| 1242 | } |
| 1243 | |
| 1244 | static const struct file_operations radio_acf_fops = { |
| 1245 | .open = simple_open, |
| 1246 | .llseek = default_llseek, |
| 1247 | .read = si476x_radio_read_acf_blob, |
| 1248 | }; |
| 1249 | |
| 1250 | static ssize_t si476x_radio_read_rds_blckcnt_blob(struct file *file, |
| 1251 | char __user *user_buf, |
| 1252 | size_t count, loff_t *ppos) |
| 1253 | { |
| 1254 | int err; |
| 1255 | struct si476x_radio *radio = file->private_data; |
| 1256 | struct si476x_rds_blockcount_report report; |
| 1257 | |
| 1258 | si476x_core_lock(radio->core); |
| 1259 | if (radio->ops->rds_blckcnt) |
| 1260 | err = radio->ops->rds_blckcnt(radio->core, true, |
| 1261 | &report); |
| 1262 | else |
| 1263 | err = -ENOENT; |
| 1264 | si476x_core_unlock(radio->core); |
| 1265 | |
| 1266 | if (err < 0) |
| 1267 | return err; |
| 1268 | |
| 1269 | return simple_read_from_buffer(user_buf, count, ppos, &report, |
| 1270 | sizeof(report)); |
| 1271 | } |
| 1272 | |
| 1273 | static const struct file_operations radio_rds_blckcnt_fops = { |
| 1274 | .open = simple_open, |
| 1275 | .llseek = default_llseek, |
| 1276 | .read = si476x_radio_read_rds_blckcnt_blob, |
| 1277 | }; |
| 1278 | |
| 1279 | static ssize_t si476x_radio_read_agc_blob(struct file *file, |
| 1280 | char __user *user_buf, |
| 1281 | size_t count, loff_t *ppos) |
| 1282 | { |
| 1283 | int err; |
| 1284 | struct si476x_radio *radio = file->private_data; |
| 1285 | struct si476x_agc_status_report report; |
| 1286 | |
| 1287 | si476x_core_lock(radio->core); |
| 1288 | if (radio->ops->rds_blckcnt) |
| 1289 | err = radio->ops->agc_status(radio->core, &report); |
| 1290 | else |
| 1291 | err = -ENOENT; |
| 1292 | si476x_core_unlock(radio->core); |
| 1293 | |
| 1294 | if (err < 0) |
| 1295 | return err; |
| 1296 | |
| 1297 | return simple_read_from_buffer(user_buf, count, ppos, &report, |
| 1298 | sizeof(report)); |
| 1299 | } |
| 1300 | |
| 1301 | static const struct file_operations radio_agc_fops = { |
| 1302 | .open = simple_open, |
| 1303 | .llseek = default_llseek, |
| 1304 | .read = si476x_radio_read_agc_blob, |
| 1305 | }; |
| 1306 | |
| 1307 | static ssize_t si476x_radio_read_rsq_blob(struct file *file, |
| 1308 | char __user *user_buf, |
| 1309 | size_t count, loff_t *ppos) |
| 1310 | { |
| 1311 | int err; |
| 1312 | struct si476x_radio *radio = file->private_data; |
| 1313 | struct si476x_rsq_status_report report; |
| 1314 | struct si476x_rsq_status_args args = { |
| 1315 | .primary = false, |
| 1316 | .rsqack = false, |
| 1317 | .attune = false, |
| 1318 | .cancel = false, |
| 1319 | .stcack = false, |
| 1320 | }; |
| 1321 | |
| 1322 | si476x_core_lock(radio->core); |
| 1323 | if (radio->ops->rds_blckcnt) |
| 1324 | err = radio->ops->rsq_status(radio->core, &args, &report); |
| 1325 | else |
| 1326 | err = -ENOENT; |
| 1327 | si476x_core_unlock(radio->core); |
| 1328 | |
| 1329 | if (err < 0) |
| 1330 | return err; |
| 1331 | |
| 1332 | return simple_read_from_buffer(user_buf, count, ppos, &report, |
| 1333 | sizeof(report)); |
| 1334 | } |
| 1335 | |
| 1336 | static const struct file_operations radio_rsq_fops = { |
| 1337 | .open = simple_open, |
| 1338 | .llseek = default_llseek, |
| 1339 | .read = si476x_radio_read_rsq_blob, |
| 1340 | }; |
| 1341 | |
| 1342 | static ssize_t si476x_radio_read_rsq_primary_blob(struct file *file, |
| 1343 | char __user *user_buf, |
| 1344 | size_t count, loff_t *ppos) |
| 1345 | { |
| 1346 | int err; |
| 1347 | struct si476x_radio *radio = file->private_data; |
| 1348 | struct si476x_rsq_status_report report; |
| 1349 | struct si476x_rsq_status_args args = { |
| 1350 | .primary = true, |
| 1351 | .rsqack = false, |
| 1352 | .attune = false, |
| 1353 | .cancel = false, |
| 1354 | .stcack = false, |
| 1355 | }; |
| 1356 | |
| 1357 | si476x_core_lock(radio->core); |
| 1358 | if (radio->ops->rds_blckcnt) |
| 1359 | err = radio->ops->rsq_status(radio->core, &args, &report); |
| 1360 | else |
| 1361 | err = -ENOENT; |
| 1362 | si476x_core_unlock(radio->core); |
| 1363 | |
| 1364 | if (err < 0) |
| 1365 | return err; |
| 1366 | |
| 1367 | return simple_read_from_buffer(user_buf, count, ppos, &report, |
| 1368 | sizeof(report)); |
| 1369 | } |
| 1370 | |
| 1371 | static const struct file_operations radio_rsq_primary_fops = { |
| 1372 | .open = simple_open, |
| 1373 | .llseek = default_llseek, |
| 1374 | .read = si476x_radio_read_rsq_primary_blob, |
| 1375 | }; |
| 1376 | |
| 1377 | |
| 1378 | static int si476x_radio_init_debugfs(struct si476x_radio *radio) |
| 1379 | { |
| 1380 | struct dentry *dentry; |
| 1381 | int ret; |
| 1382 | |
| 1383 | dentry = debugfs_create_dir(dev_name(radio->v4l2dev.dev), NULL); |
| 1384 | if (IS_ERR(dentry)) { |
| 1385 | ret = PTR_ERR(dentry); |
| 1386 | goto exit; |
| 1387 | } |
| 1388 | radio->debugfs = dentry; |
| 1389 | |
| 1390 | dentry = debugfs_create_file("acf", S_IRUGO, |
| 1391 | radio->debugfs, radio, &radio_acf_fops); |
| 1392 | if (IS_ERR(dentry)) { |
| 1393 | ret = PTR_ERR(dentry); |
| 1394 | goto cleanup; |
| 1395 | } |
| 1396 | |
| 1397 | dentry = debugfs_create_file("rds_blckcnt", S_IRUGO, |
| 1398 | radio->debugfs, radio, |
| 1399 | &radio_rds_blckcnt_fops); |
| 1400 | if (IS_ERR(dentry)) { |
| 1401 | ret = PTR_ERR(dentry); |
| 1402 | goto cleanup; |
| 1403 | } |
| 1404 | |
| 1405 | dentry = debugfs_create_file("agc", S_IRUGO, |
| 1406 | radio->debugfs, radio, &radio_agc_fops); |
| 1407 | if (IS_ERR(dentry)) { |
| 1408 | ret = PTR_ERR(dentry); |
| 1409 | goto cleanup; |
| 1410 | } |
| 1411 | |
| 1412 | dentry = debugfs_create_file("rsq", S_IRUGO, |
| 1413 | radio->debugfs, radio, &radio_rsq_fops); |
| 1414 | if (IS_ERR(dentry)) { |
| 1415 | ret = PTR_ERR(dentry); |
| 1416 | goto cleanup; |
| 1417 | } |
| 1418 | |
| 1419 | dentry = debugfs_create_file("rsq_primary", S_IRUGO, |
| 1420 | radio->debugfs, radio, |
| 1421 | &radio_rsq_primary_fops); |
| 1422 | if (IS_ERR(dentry)) { |
| 1423 | ret = PTR_ERR(dentry); |
| 1424 | goto cleanup; |
| 1425 | } |
| 1426 | |
| 1427 | return 0; |
| 1428 | cleanup: |
| 1429 | debugfs_remove_recursive(radio->debugfs); |
| 1430 | exit: |
| 1431 | return ret; |
| 1432 | } |
| 1433 | |
| 1434 | |
| 1435 | static int si476x_radio_add_new_custom(struct si476x_radio *radio, |
| 1436 | enum si476x_ctrl_idx idx) |
| 1437 | { |
| 1438 | int rval; |
| 1439 | struct v4l2_ctrl *ctrl; |
| 1440 | |
| 1441 | ctrl = v4l2_ctrl_new_custom(&radio->ctrl_handler, |
| 1442 | &si476x_ctrls[idx], |
| 1443 | NULL); |
| 1444 | rval = radio->ctrl_handler.error; |
| 1445 | if (ctrl == NULL && rval) |
| 1446 | dev_err(radio->v4l2dev.dev, |
| 1447 | "Could not initialize '%s' control %d\n", |
| 1448 | si476x_ctrls[idx].name, rval); |
| 1449 | |
| 1450 | return rval; |
| 1451 | } |
| 1452 | |
| 1453 | static int si476x_radio_probe(struct platform_device *pdev) |
| 1454 | { |
| 1455 | int rval; |
| 1456 | struct si476x_radio *radio; |
| 1457 | struct v4l2_ctrl *ctrl; |
| 1458 | |
| 1459 | static atomic_t instance = ATOMIC_INIT(0); |
| 1460 | |
| 1461 | radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL); |
| 1462 | if (!radio) |
| 1463 | return -ENOMEM; |
| 1464 | |
| 1465 | radio->core = i2c_mfd_cell_to_core(&pdev->dev); |
| 1466 | |
| 1467 | v4l2_device_set_name(&radio->v4l2dev, DRIVER_NAME, &instance); |
| 1468 | |
| 1469 | rval = v4l2_device_register(&pdev->dev, &radio->v4l2dev); |
| 1470 | if (rval) { |
| 1471 | dev_err(&pdev->dev, "Cannot register v4l2_device.\n"); |
| 1472 | return rval; |
| 1473 | } |
| 1474 | |
| 1475 | memcpy(&radio->videodev, &si476x_viddev_template, |
| 1476 | sizeof(struct video_device)); |
| 1477 | |
| 1478 | radio->videodev.v4l2_dev = &radio->v4l2dev; |
| 1479 | radio->videodev.ioctl_ops = &si4761_ioctl_ops; |
| 1480 | |
| 1481 | video_set_drvdata(&radio->videodev, radio); |
| 1482 | platform_set_drvdata(pdev, radio); |
| 1483 | |
| 1484 | set_bit(V4L2_FL_USE_FH_PRIO, &radio->videodev.flags); |
| 1485 | |
| 1486 | radio->v4l2dev.ctrl_handler = &radio->ctrl_handler; |
| 1487 | v4l2_ctrl_handler_init(&radio->ctrl_handler, |
| 1488 | 1 + ARRAY_SIZE(si476x_ctrls)); |
| 1489 | |
| 1490 | if (si476x_core_has_am(radio->core)) { |
| 1491 | ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler, |
| 1492 | &si476x_ctrl_ops, |
| 1493 | V4L2_CID_POWER_LINE_FREQUENCY, |
| 1494 | V4L2_CID_POWER_LINE_FREQUENCY_60HZ, |
| 1495 | 0, 0); |
| 1496 | rval = radio->ctrl_handler.error; |
| 1497 | if (ctrl == NULL && rval) { |
| 1498 | dev_err(&pdev->dev, "Could not initialize V4L2_CID_POWER_LINE_FREQUENCY control %d\n", |
| 1499 | rval); |
| 1500 | goto exit; |
| 1501 | } |
| 1502 | |
| 1503 | rval = si476x_radio_add_new_custom(radio, |
| 1504 | SI476X_IDX_HARMONICS_COUNT); |
| 1505 | if (rval < 0) |
| 1506 | goto exit; |
| 1507 | } |
| 1508 | |
| 1509 | rval = si476x_radio_add_new_custom(radio, SI476X_IDX_RSSI_THRESHOLD); |
| 1510 | if (rval < 0) |
| 1511 | goto exit; |
| 1512 | |
| 1513 | rval = si476x_radio_add_new_custom(radio, SI476X_IDX_SNR_THRESHOLD); |
| 1514 | if (rval < 0) |
| 1515 | goto exit; |
| 1516 | |
| 1517 | rval = si476x_radio_add_new_custom(radio, SI476X_IDX_MAX_TUNE_ERROR); |
| 1518 | if (rval < 0) |
| 1519 | goto exit; |
| 1520 | |
| 1521 | ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler, |
| 1522 | &si476x_ctrl_ops, |
| 1523 | V4L2_CID_TUNE_DEEMPHASIS, |
| 1524 | V4L2_DEEMPHASIS_75_uS, 0, 0); |
| 1525 | rval = radio->ctrl_handler.error; |
| 1526 | if (ctrl == NULL && rval) { |
| 1527 | dev_err(&pdev->dev, "Could not initialize V4L2_CID_TUNE_DEEMPHASIS control %d\n", |
| 1528 | rval); |
| 1529 | goto exit; |
| 1530 | } |
| 1531 | |
| 1532 | ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &si476x_ctrl_ops, |
| 1533 | V4L2_CID_RDS_RECEPTION, |
| 1534 | 0, 1, 1, 1); |
| 1535 | rval = radio->ctrl_handler.error; |
| 1536 | if (ctrl == NULL && rval) { |
| 1537 | dev_err(&pdev->dev, "Could not initialize V4L2_CID_RDS_RECEPTION control %d\n", |
| 1538 | rval); |
| 1539 | goto exit; |
| 1540 | } |
| 1541 | |
| 1542 | if (si476x_core_has_diversity(radio->core)) { |
| 1543 | si476x_ctrls[SI476X_IDX_DIVERSITY_MODE].def = |
| 1544 | si476x_phase_diversity_mode_to_idx(radio->core->diversity_mode); |
| 1545 | si476x_radio_add_new_custom(radio, SI476X_IDX_DIVERSITY_MODE); |
| 1546 | if (rval < 0) |
| 1547 | goto exit; |
| 1548 | |
| 1549 | si476x_radio_add_new_custom(radio, SI476X_IDX_INTERCHIP_LINK); |
| 1550 | if (rval < 0) |
| 1551 | goto exit; |
| 1552 | } |
| 1553 | |
| 1554 | /* register video device */ |
| 1555 | rval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, -1); |
| 1556 | if (rval < 0) { |
| 1557 | dev_err(&pdev->dev, "Could not register video device\n"); |
| 1558 | goto exit; |
| 1559 | } |
| 1560 | |
| 1561 | rval = si476x_radio_init_debugfs(radio); |
| 1562 | if (rval < 0) { |
| 1563 | dev_err(&pdev->dev, "Could not creat debugfs interface\n"); |
| 1564 | goto exit; |
| 1565 | } |
| 1566 | |
| 1567 | return 0; |
| 1568 | exit: |
| 1569 | v4l2_ctrl_handler_free(radio->videodev.ctrl_handler); |
| 1570 | return rval; |
| 1571 | } |
| 1572 | |
| 1573 | static int si476x_radio_remove(struct platform_device *pdev) |
| 1574 | { |
| 1575 | struct si476x_radio *radio = platform_get_drvdata(pdev); |
| 1576 | |
| 1577 | v4l2_ctrl_handler_free(radio->videodev.ctrl_handler); |
| 1578 | video_unregister_device(&radio->videodev); |
| 1579 | v4l2_device_unregister(&radio->v4l2dev); |
| 1580 | debugfs_remove_recursive(radio->debugfs); |
| 1581 | |
| 1582 | return 0; |
| 1583 | } |
| 1584 | |
| 1585 | MODULE_ALIAS("platform:si476x-radio"); |
| 1586 | |
| 1587 | static struct platform_driver si476x_radio_driver = { |
| 1588 | .driver = { |
| 1589 | .name = DRIVER_NAME, |
| 1590 | .owner = THIS_MODULE, |
| 1591 | }, |
| 1592 | .probe = si476x_radio_probe, |
| 1593 | .remove = si476x_radio_remove, |
| 1594 | }; |
| 1595 | module_platform_driver(si476x_radio_driver); |
| 1596 | |
| 1597 | MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>"); |
| 1598 | MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell"); |
| 1599 | MODULE_LICENSE("GPL"); |