| 1 | /* |
| 2 | * ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips |
| 3 | * |
| 4 | * Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz> |
| 5 | * |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | */ |
| 18 | |
| 19 | #include <linux/delay.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/slab.h> |
| 23 | #include <linux/sched.h> |
| 24 | #include <asm/io.h> |
| 25 | #include <media/v4l2-device.h> |
| 26 | #include <media/v4l2-dev.h> |
| 27 | #include <media/v4l2-fh.h> |
| 28 | #include <media/v4l2-ioctl.h> |
| 29 | #include <media/v4l2-event.h> |
| 30 | #include <media/drv-intf/tea575x.h> |
| 31 | |
| 32 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
| 33 | MODULE_DESCRIPTION("Routines for control of TEA5757/5759 Philips AM/FM radio tuner chips"); |
| 34 | MODULE_LICENSE("GPL"); |
| 35 | |
| 36 | /* |
| 37 | * definitions |
| 38 | */ |
| 39 | |
| 40 | #define TEA575X_BIT_SEARCH (1<<24) /* 1 = search action, 0 = tuned */ |
| 41 | #define TEA575X_BIT_UPDOWN (1<<23) /* 0 = search down, 1 = search up */ |
| 42 | #define TEA575X_BIT_MONO (1<<22) /* 0 = stereo, 1 = mono */ |
| 43 | #define TEA575X_BIT_BAND_MASK (3<<20) |
| 44 | #define TEA575X_BIT_BAND_FM (0<<20) |
| 45 | #define TEA575X_BIT_BAND_MW (1<<20) |
| 46 | #define TEA575X_BIT_BAND_LW (2<<20) |
| 47 | #define TEA575X_BIT_BAND_SW (3<<20) |
| 48 | #define TEA575X_BIT_PORT_0 (1<<19) /* user bit */ |
| 49 | #define TEA575X_BIT_PORT_1 (1<<18) /* user bit */ |
| 50 | #define TEA575X_BIT_SEARCH_MASK (3<<16) /* search level */ |
| 51 | #define TEA575X_BIT_SEARCH_5_28 (0<<16) /* FM >5uV, AM >28uV */ |
| 52 | #define TEA575X_BIT_SEARCH_10_40 (1<<16) /* FM >10uV, AM > 40uV */ |
| 53 | #define TEA575X_BIT_SEARCH_30_63 (2<<16) /* FM >30uV, AM > 63uV */ |
| 54 | #define TEA575X_BIT_SEARCH_150_1000 (3<<16) /* FM > 150uV, AM > 1000uV */ |
| 55 | #define TEA575X_BIT_DUMMY (1<<15) /* buffer */ |
| 56 | #define TEA575X_BIT_FREQ_MASK 0x7fff |
| 57 | |
| 58 | enum { BAND_FM, BAND_FM_JAPAN, BAND_AM }; |
| 59 | |
| 60 | static const struct v4l2_frequency_band bands[] = { |
| 61 | { |
| 62 | .type = V4L2_TUNER_RADIO, |
| 63 | .index = 0, |
| 64 | .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | |
| 65 | V4L2_TUNER_CAP_FREQ_BANDS, |
| 66 | .rangelow = 87500 * 16, |
| 67 | .rangehigh = 108000 * 16, |
| 68 | .modulation = V4L2_BAND_MODULATION_FM, |
| 69 | }, |
| 70 | { |
| 71 | .type = V4L2_TUNER_RADIO, |
| 72 | .index = 0, |
| 73 | .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | |
| 74 | V4L2_TUNER_CAP_FREQ_BANDS, |
| 75 | .rangelow = 76000 * 16, |
| 76 | .rangehigh = 91000 * 16, |
| 77 | .modulation = V4L2_BAND_MODULATION_FM, |
| 78 | }, |
| 79 | { |
| 80 | .type = V4L2_TUNER_RADIO, |
| 81 | .index = 1, |
| 82 | .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS, |
| 83 | .rangelow = 530 * 16, |
| 84 | .rangehigh = 1710 * 16, |
| 85 | .modulation = V4L2_BAND_MODULATION_AM, |
| 86 | }, |
| 87 | }; |
| 88 | |
| 89 | /* |
| 90 | * lowlevel part |
| 91 | */ |
| 92 | |
| 93 | static void snd_tea575x_write(struct snd_tea575x *tea, unsigned int val) |
| 94 | { |
| 95 | u16 l; |
| 96 | u8 data; |
| 97 | |
| 98 | if (tea->ops->write_val) |
| 99 | return tea->ops->write_val(tea, val); |
| 100 | |
| 101 | tea->ops->set_direction(tea, 1); |
| 102 | udelay(16); |
| 103 | |
| 104 | for (l = 25; l > 0; l--) { |
| 105 | data = (val >> 24) & TEA575X_DATA; |
| 106 | val <<= 1; /* shift data */ |
| 107 | tea->ops->set_pins(tea, data | TEA575X_WREN); |
| 108 | udelay(2); |
| 109 | tea->ops->set_pins(tea, data | TEA575X_WREN | TEA575X_CLK); |
| 110 | udelay(2); |
| 111 | tea->ops->set_pins(tea, data | TEA575X_WREN); |
| 112 | udelay(2); |
| 113 | } |
| 114 | |
| 115 | if (!tea->mute) |
| 116 | tea->ops->set_pins(tea, 0); |
| 117 | } |
| 118 | |
| 119 | static u32 snd_tea575x_read(struct snd_tea575x *tea) |
| 120 | { |
| 121 | u16 l, rdata; |
| 122 | u32 data = 0; |
| 123 | |
| 124 | if (tea->ops->read_val) |
| 125 | return tea->ops->read_val(tea); |
| 126 | |
| 127 | tea->ops->set_direction(tea, 0); |
| 128 | tea->ops->set_pins(tea, 0); |
| 129 | udelay(16); |
| 130 | |
| 131 | for (l = 24; l--;) { |
| 132 | tea->ops->set_pins(tea, TEA575X_CLK); |
| 133 | udelay(2); |
| 134 | if (!l) |
| 135 | tea->tuned = tea->ops->get_pins(tea) & TEA575X_MOST ? 0 : 1; |
| 136 | tea->ops->set_pins(tea, 0); |
| 137 | udelay(2); |
| 138 | data <<= 1; /* shift data */ |
| 139 | rdata = tea->ops->get_pins(tea); |
| 140 | if (!l) |
| 141 | tea->stereo = (rdata & TEA575X_MOST) ? 0 : 1; |
| 142 | if (rdata & TEA575X_DATA) |
| 143 | data++; |
| 144 | udelay(2); |
| 145 | } |
| 146 | |
| 147 | if (tea->mute) |
| 148 | tea->ops->set_pins(tea, TEA575X_WREN); |
| 149 | |
| 150 | return data; |
| 151 | } |
| 152 | |
| 153 | static u32 snd_tea575x_val_to_freq(struct snd_tea575x *tea, u32 val) |
| 154 | { |
| 155 | u32 freq = val & TEA575X_BIT_FREQ_MASK; |
| 156 | |
| 157 | if (freq == 0) |
| 158 | return freq; |
| 159 | |
| 160 | switch (tea->band) { |
| 161 | case BAND_FM: |
| 162 | /* freq *= 12.5 */ |
| 163 | freq *= 125; |
| 164 | freq /= 10; |
| 165 | /* crystal fixup */ |
| 166 | freq -= TEA575X_FMIF; |
| 167 | break; |
| 168 | case BAND_FM_JAPAN: |
| 169 | /* freq *= 12.5 */ |
| 170 | freq *= 125; |
| 171 | freq /= 10; |
| 172 | /* crystal fixup */ |
| 173 | freq += TEA575X_FMIF; |
| 174 | break; |
| 175 | case BAND_AM: |
| 176 | /* crystal fixup */ |
| 177 | freq -= TEA575X_AMIF; |
| 178 | break; |
| 179 | } |
| 180 | |
| 181 | return clamp(freq * 16, bands[tea->band].rangelow, |
| 182 | bands[tea->band].rangehigh); /* from kHz */ |
| 183 | } |
| 184 | |
| 185 | static u32 snd_tea575x_get_freq(struct snd_tea575x *tea) |
| 186 | { |
| 187 | return snd_tea575x_val_to_freq(tea, snd_tea575x_read(tea)); |
| 188 | } |
| 189 | |
| 190 | void snd_tea575x_set_freq(struct snd_tea575x *tea) |
| 191 | { |
| 192 | u32 freq = tea->freq / 16; /* to kHz */ |
| 193 | u32 band = 0; |
| 194 | |
| 195 | switch (tea->band) { |
| 196 | case BAND_FM: |
| 197 | band = TEA575X_BIT_BAND_FM; |
| 198 | /* crystal fixup */ |
| 199 | freq += TEA575X_FMIF; |
| 200 | /* freq /= 12.5 */ |
| 201 | freq *= 10; |
| 202 | freq /= 125; |
| 203 | break; |
| 204 | case BAND_FM_JAPAN: |
| 205 | band = TEA575X_BIT_BAND_FM; |
| 206 | /* crystal fixup */ |
| 207 | freq -= TEA575X_FMIF; |
| 208 | /* freq /= 12.5 */ |
| 209 | freq *= 10; |
| 210 | freq /= 125; |
| 211 | break; |
| 212 | case BAND_AM: |
| 213 | band = TEA575X_BIT_BAND_MW; |
| 214 | /* crystal fixup */ |
| 215 | freq += TEA575X_AMIF; |
| 216 | break; |
| 217 | } |
| 218 | |
| 219 | tea->val &= ~(TEA575X_BIT_FREQ_MASK | TEA575X_BIT_BAND_MASK); |
| 220 | tea->val |= band; |
| 221 | tea->val |= freq & TEA575X_BIT_FREQ_MASK; |
| 222 | snd_tea575x_write(tea, tea->val); |
| 223 | tea->freq = snd_tea575x_val_to_freq(tea, tea->val); |
| 224 | } |
| 225 | EXPORT_SYMBOL(snd_tea575x_set_freq); |
| 226 | |
| 227 | /* |
| 228 | * Linux Video interface |
| 229 | */ |
| 230 | |
| 231 | static int vidioc_querycap(struct file *file, void *priv, |
| 232 | struct v4l2_capability *v) |
| 233 | { |
| 234 | struct snd_tea575x *tea = video_drvdata(file); |
| 235 | |
| 236 | strlcpy(v->driver, tea->v4l2_dev->name, sizeof(v->driver)); |
| 237 | strlcpy(v->card, tea->card, sizeof(v->card)); |
| 238 | strlcat(v->card, tea->tea5759 ? " TEA5759" : " TEA5757", sizeof(v->card)); |
| 239 | strlcpy(v->bus_info, tea->bus_info, sizeof(v->bus_info)); |
| 240 | v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO; |
| 241 | if (!tea->cannot_read_data) |
| 242 | v->device_caps |= V4L2_CAP_HW_FREQ_SEEK; |
| 243 | v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS; |
| 244 | return 0; |
| 245 | } |
| 246 | |
| 247 | int snd_tea575x_enum_freq_bands(struct snd_tea575x *tea, |
| 248 | struct v4l2_frequency_band *band) |
| 249 | { |
| 250 | int index; |
| 251 | |
| 252 | if (band->tuner != 0) |
| 253 | return -EINVAL; |
| 254 | |
| 255 | switch (band->index) { |
| 256 | case 0: |
| 257 | if (tea->tea5759) |
| 258 | index = BAND_FM_JAPAN; |
| 259 | else |
| 260 | index = BAND_FM; |
| 261 | break; |
| 262 | case 1: |
| 263 | if (tea->has_am) { |
| 264 | index = BAND_AM; |
| 265 | break; |
| 266 | } |
| 267 | /* Fall through */ |
| 268 | default: |
| 269 | return -EINVAL; |
| 270 | } |
| 271 | |
| 272 | *band = bands[index]; |
| 273 | if (!tea->cannot_read_data) |
| 274 | band->capability |= V4L2_TUNER_CAP_HWSEEK_BOUNDED; |
| 275 | |
| 276 | return 0; |
| 277 | } |
| 278 | EXPORT_SYMBOL(snd_tea575x_enum_freq_bands); |
| 279 | |
| 280 | static int vidioc_enum_freq_bands(struct file *file, void *priv, |
| 281 | struct v4l2_frequency_band *band) |
| 282 | { |
| 283 | struct snd_tea575x *tea = video_drvdata(file); |
| 284 | |
| 285 | return snd_tea575x_enum_freq_bands(tea, band); |
| 286 | } |
| 287 | |
| 288 | int snd_tea575x_g_tuner(struct snd_tea575x *tea, struct v4l2_tuner *v) |
| 289 | { |
| 290 | struct v4l2_frequency_band band_fm = { 0, }; |
| 291 | |
| 292 | if (v->index > 0) |
| 293 | return -EINVAL; |
| 294 | |
| 295 | snd_tea575x_read(tea); |
| 296 | snd_tea575x_enum_freq_bands(tea, &band_fm); |
| 297 | |
| 298 | memset(v, 0, sizeof(*v)); |
| 299 | strlcpy(v->name, tea->has_am ? "FM/AM" : "FM", sizeof(v->name)); |
| 300 | v->type = V4L2_TUNER_RADIO; |
| 301 | v->capability = band_fm.capability; |
| 302 | v->rangelow = tea->has_am ? bands[BAND_AM].rangelow : band_fm.rangelow; |
| 303 | v->rangehigh = band_fm.rangehigh; |
| 304 | v->rxsubchans = tea->stereo ? V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO; |
| 305 | v->audmode = (tea->val & TEA575X_BIT_MONO) ? |
| 306 | V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO; |
| 307 | v->signal = tea->tuned ? 0xffff : 0; |
| 308 | return 0; |
| 309 | } |
| 310 | EXPORT_SYMBOL(snd_tea575x_g_tuner); |
| 311 | |
| 312 | static int vidioc_g_tuner(struct file *file, void *priv, |
| 313 | struct v4l2_tuner *v) |
| 314 | { |
| 315 | struct snd_tea575x *tea = video_drvdata(file); |
| 316 | |
| 317 | return snd_tea575x_g_tuner(tea, v); |
| 318 | } |
| 319 | |
| 320 | static int vidioc_s_tuner(struct file *file, void *priv, |
| 321 | const struct v4l2_tuner *v) |
| 322 | { |
| 323 | struct snd_tea575x *tea = video_drvdata(file); |
| 324 | u32 orig_val = tea->val; |
| 325 | |
| 326 | if (v->index) |
| 327 | return -EINVAL; |
| 328 | tea->val &= ~TEA575X_BIT_MONO; |
| 329 | if (v->audmode == V4L2_TUNER_MODE_MONO) |
| 330 | tea->val |= TEA575X_BIT_MONO; |
| 331 | /* Only apply changes if currently tuning FM */ |
| 332 | if (tea->band != BAND_AM && tea->val != orig_val) |
| 333 | snd_tea575x_set_freq(tea); |
| 334 | |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | static int vidioc_g_frequency(struct file *file, void *priv, |
| 339 | struct v4l2_frequency *f) |
| 340 | { |
| 341 | struct snd_tea575x *tea = video_drvdata(file); |
| 342 | |
| 343 | if (f->tuner != 0) |
| 344 | return -EINVAL; |
| 345 | f->type = V4L2_TUNER_RADIO; |
| 346 | f->frequency = tea->freq; |
| 347 | return 0; |
| 348 | } |
| 349 | |
| 350 | static int vidioc_s_frequency(struct file *file, void *priv, |
| 351 | const struct v4l2_frequency *f) |
| 352 | { |
| 353 | struct snd_tea575x *tea = video_drvdata(file); |
| 354 | |
| 355 | if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) |
| 356 | return -EINVAL; |
| 357 | |
| 358 | if (tea->has_am && f->frequency < (20000 * 16)) |
| 359 | tea->band = BAND_AM; |
| 360 | else if (tea->tea5759) |
| 361 | tea->band = BAND_FM_JAPAN; |
| 362 | else |
| 363 | tea->band = BAND_FM; |
| 364 | |
| 365 | tea->freq = clamp_t(u32, f->frequency, bands[tea->band].rangelow, |
| 366 | bands[tea->band].rangehigh); |
| 367 | snd_tea575x_set_freq(tea); |
| 368 | return 0; |
| 369 | } |
| 370 | |
| 371 | int snd_tea575x_s_hw_freq_seek(struct file *file, struct snd_tea575x *tea, |
| 372 | const struct v4l2_hw_freq_seek *a) |
| 373 | { |
| 374 | unsigned long timeout; |
| 375 | int i, spacing; |
| 376 | |
| 377 | if (tea->cannot_read_data) |
| 378 | return -ENOTTY; |
| 379 | if (a->tuner || a->wrap_around) |
| 380 | return -EINVAL; |
| 381 | |
| 382 | if (file->f_flags & O_NONBLOCK) |
| 383 | return -EWOULDBLOCK; |
| 384 | |
| 385 | if (a->rangelow || a->rangehigh) { |
| 386 | for (i = 0; i < ARRAY_SIZE(bands); i++) { |
| 387 | if ((i == BAND_FM && tea->tea5759) || |
| 388 | (i == BAND_FM_JAPAN && !tea->tea5759) || |
| 389 | (i == BAND_AM && !tea->has_am)) |
| 390 | continue; |
| 391 | if (bands[i].rangelow == a->rangelow && |
| 392 | bands[i].rangehigh == a->rangehigh) |
| 393 | break; |
| 394 | } |
| 395 | if (i == ARRAY_SIZE(bands)) |
| 396 | return -EINVAL; /* No matching band found */ |
| 397 | if (i != tea->band) { |
| 398 | tea->band = i; |
| 399 | tea->freq = clamp(tea->freq, bands[i].rangelow, |
| 400 | bands[i].rangehigh); |
| 401 | snd_tea575x_set_freq(tea); |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | spacing = (tea->band == BAND_AM) ? 5 : 50; /* kHz */ |
| 406 | |
| 407 | /* clear the frequency, HW will fill it in */ |
| 408 | tea->val &= ~TEA575X_BIT_FREQ_MASK; |
| 409 | tea->val |= TEA575X_BIT_SEARCH; |
| 410 | if (a->seek_upward) |
| 411 | tea->val |= TEA575X_BIT_UPDOWN; |
| 412 | else |
| 413 | tea->val &= ~TEA575X_BIT_UPDOWN; |
| 414 | snd_tea575x_write(tea, tea->val); |
| 415 | timeout = jiffies + msecs_to_jiffies(10000); |
| 416 | for (;;) { |
| 417 | if (time_after(jiffies, timeout)) |
| 418 | break; |
| 419 | if (schedule_timeout_interruptible(msecs_to_jiffies(10))) { |
| 420 | /* some signal arrived, stop search */ |
| 421 | tea->val &= ~TEA575X_BIT_SEARCH; |
| 422 | snd_tea575x_set_freq(tea); |
| 423 | return -ERESTARTSYS; |
| 424 | } |
| 425 | if (!(snd_tea575x_read(tea) & TEA575X_BIT_SEARCH)) { |
| 426 | u32 freq; |
| 427 | |
| 428 | /* Found a frequency, wait until it can be read */ |
| 429 | for (i = 0; i < 100; i++) { |
| 430 | msleep(10); |
| 431 | freq = snd_tea575x_get_freq(tea); |
| 432 | if (freq) /* available */ |
| 433 | break; |
| 434 | } |
| 435 | if (freq == 0) /* shouldn't happen */ |
| 436 | break; |
| 437 | /* |
| 438 | * if we moved by less than the spacing, or in the |
| 439 | * wrong direction, continue seeking |
| 440 | */ |
| 441 | if (abs(tea->freq - freq) < 16 * spacing || |
| 442 | (a->seek_upward && freq < tea->freq) || |
| 443 | (!a->seek_upward && freq > tea->freq)) { |
| 444 | snd_tea575x_write(tea, tea->val); |
| 445 | continue; |
| 446 | } |
| 447 | tea->freq = freq; |
| 448 | tea->val &= ~TEA575X_BIT_SEARCH; |
| 449 | return 0; |
| 450 | } |
| 451 | } |
| 452 | tea->val &= ~TEA575X_BIT_SEARCH; |
| 453 | snd_tea575x_set_freq(tea); |
| 454 | return -ENODATA; |
| 455 | } |
| 456 | EXPORT_SYMBOL(snd_tea575x_s_hw_freq_seek); |
| 457 | |
| 458 | static int vidioc_s_hw_freq_seek(struct file *file, void *fh, |
| 459 | const struct v4l2_hw_freq_seek *a) |
| 460 | { |
| 461 | struct snd_tea575x *tea = video_drvdata(file); |
| 462 | |
| 463 | return snd_tea575x_s_hw_freq_seek(file, tea, a); |
| 464 | } |
| 465 | |
| 466 | static int tea575x_s_ctrl(struct v4l2_ctrl *ctrl) |
| 467 | { |
| 468 | struct snd_tea575x *tea = container_of(ctrl->handler, struct snd_tea575x, ctrl_handler); |
| 469 | |
| 470 | switch (ctrl->id) { |
| 471 | case V4L2_CID_AUDIO_MUTE: |
| 472 | tea->mute = ctrl->val; |
| 473 | snd_tea575x_set_freq(tea); |
| 474 | return 0; |
| 475 | } |
| 476 | |
| 477 | return -EINVAL; |
| 478 | } |
| 479 | |
| 480 | static const struct v4l2_file_operations tea575x_fops = { |
| 481 | .unlocked_ioctl = video_ioctl2, |
| 482 | .open = v4l2_fh_open, |
| 483 | .release = v4l2_fh_release, |
| 484 | .poll = v4l2_ctrl_poll, |
| 485 | }; |
| 486 | |
| 487 | static const struct v4l2_ioctl_ops tea575x_ioctl_ops = { |
| 488 | .vidioc_querycap = vidioc_querycap, |
| 489 | .vidioc_g_tuner = vidioc_g_tuner, |
| 490 | .vidioc_s_tuner = vidioc_s_tuner, |
| 491 | .vidioc_g_frequency = vidioc_g_frequency, |
| 492 | .vidioc_s_frequency = vidioc_s_frequency, |
| 493 | .vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek, |
| 494 | .vidioc_enum_freq_bands = vidioc_enum_freq_bands, |
| 495 | .vidioc_log_status = v4l2_ctrl_log_status, |
| 496 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
| 497 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
| 498 | }; |
| 499 | |
| 500 | static const struct video_device tea575x_radio = { |
| 501 | .ioctl_ops = &tea575x_ioctl_ops, |
| 502 | .release = video_device_release_empty, |
| 503 | }; |
| 504 | |
| 505 | static const struct v4l2_ctrl_ops tea575x_ctrl_ops = { |
| 506 | .s_ctrl = tea575x_s_ctrl, |
| 507 | }; |
| 508 | |
| 509 | |
| 510 | int snd_tea575x_hw_init(struct snd_tea575x *tea) |
| 511 | { |
| 512 | tea->mute = true; |
| 513 | |
| 514 | /* Not all devices can or know how to read the data back. |
| 515 | Such devices can set cannot_read_data to true. */ |
| 516 | if (!tea->cannot_read_data) { |
| 517 | snd_tea575x_write(tea, 0x55AA); |
| 518 | if (snd_tea575x_read(tea) != 0x55AA) |
| 519 | return -ENODEV; |
| 520 | } |
| 521 | |
| 522 | tea->val = TEA575X_BIT_BAND_FM | TEA575X_BIT_SEARCH_5_28; |
| 523 | tea->freq = 90500 * 16; /* 90.5Mhz default */ |
| 524 | snd_tea575x_set_freq(tea); |
| 525 | |
| 526 | return 0; |
| 527 | } |
| 528 | EXPORT_SYMBOL(snd_tea575x_hw_init); |
| 529 | |
| 530 | int snd_tea575x_init(struct snd_tea575x *tea, struct module *owner) |
| 531 | { |
| 532 | int retval = snd_tea575x_hw_init(tea); |
| 533 | |
| 534 | if (retval) |
| 535 | return retval; |
| 536 | |
| 537 | tea->vd = tea575x_radio; |
| 538 | video_set_drvdata(&tea->vd, tea); |
| 539 | mutex_init(&tea->mutex); |
| 540 | strlcpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name)); |
| 541 | tea->vd.lock = &tea->mutex; |
| 542 | tea->vd.v4l2_dev = tea->v4l2_dev; |
| 543 | tea->fops = tea575x_fops; |
| 544 | tea->fops.owner = owner; |
| 545 | tea->vd.fops = &tea->fops; |
| 546 | /* disable hw_freq_seek if we can't use it */ |
| 547 | if (tea->cannot_read_data) |
| 548 | v4l2_disable_ioctl(&tea->vd, VIDIOC_S_HW_FREQ_SEEK); |
| 549 | |
| 550 | if (!tea->cannot_mute) { |
| 551 | tea->vd.ctrl_handler = &tea->ctrl_handler; |
| 552 | v4l2_ctrl_handler_init(&tea->ctrl_handler, 1); |
| 553 | v4l2_ctrl_new_std(&tea->ctrl_handler, &tea575x_ctrl_ops, |
| 554 | V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); |
| 555 | retval = tea->ctrl_handler.error; |
| 556 | if (retval) { |
| 557 | v4l2_err(tea->v4l2_dev, "can't initialize controls\n"); |
| 558 | v4l2_ctrl_handler_free(&tea->ctrl_handler); |
| 559 | return retval; |
| 560 | } |
| 561 | |
| 562 | if (tea->ext_init) { |
| 563 | retval = tea->ext_init(tea); |
| 564 | if (retval) { |
| 565 | v4l2_ctrl_handler_free(&tea->ctrl_handler); |
| 566 | return retval; |
| 567 | } |
| 568 | } |
| 569 | |
| 570 | v4l2_ctrl_handler_setup(&tea->ctrl_handler); |
| 571 | } |
| 572 | |
| 573 | retval = video_register_device(&tea->vd, VFL_TYPE_RADIO, tea->radio_nr); |
| 574 | if (retval) { |
| 575 | v4l2_err(tea->v4l2_dev, "can't register video device!\n"); |
| 576 | v4l2_ctrl_handler_free(tea->vd.ctrl_handler); |
| 577 | return retval; |
| 578 | } |
| 579 | |
| 580 | return 0; |
| 581 | } |
| 582 | EXPORT_SYMBOL(snd_tea575x_init); |
| 583 | |
| 584 | void snd_tea575x_exit(struct snd_tea575x *tea) |
| 585 | { |
| 586 | video_unregister_device(&tea->vd); |
| 587 | v4l2_ctrl_handler_free(tea->vd.ctrl_handler); |
| 588 | } |
| 589 | EXPORT_SYMBOL(snd_tea575x_exit); |