drivers/media/video/tlg2300/pd-radio.c

   1 #include <linux/init.h>
   2 #include <linux/list.h>
   3 #include <linux/module.h>
   4 #include <linux/kernel.h>
   5 #include <linux/bitmap.h>
   6 #include <linux/usb.h>
   7 #include <linux/i2c.h>
   8 #include <media/v4l2-dev.h>
   9 #include <linux/mm.h>
  10 #include <linux/mutex.h>
  11 #include <media/v4l2-ioctl.h>
  12 #include <linux/sched.h>
  13
  14 #include "pd-common.h"
  15 #include "vendorcmds.h"
  16
  17 static int set_frequency(struct poseidon *p, __u32 frequency);
  18 static int poseidon_fm_close(struct file *filp);
  19 static int poseidon_fm_open(struct file *filp);
  20
  21 #define TUNER_FREQ_MIN_FM 76000000
  22 #define TUNER_FREQ_MAX_FM 108000000
  23
  24 #define MAX_PREEMPHASIS (V4L2_PREEMPHASIS_75_uS + 1)
  25 static int preemphasis[MAX_PREEMPHASIS] = {
  26         TLG_TUNE_ASTD_NONE,   /* V4L2_PREEMPHASIS_DISABLED */
  27         TLG_TUNE_ASTD_FM_EUR, /* V4L2_PREEMPHASIS_50_uS    */
  28         TLG_TUNE_ASTD_FM_US,  /* V4L2_PREEMPHASIS_75_uS    */
  29 };
  30
  31 static int poseidon_check_mode_radio(struct poseidon *p)
  32 {
  33         int ret;
  34         u32 status;
  35
  36         set_current_state(TASK_INTERRUPTIBLE);
  37         schedule_timeout(HZ/2);
  38         ret = usb_set_interface(p->udev, 0, BULK_ALTERNATE_IFACE);
  39         if (ret < 0)
  40                 goto out;
  41
  42         ret = set_tuner_mode(p, TLG_MODE_FM_RADIO);
  43         if (ret != 0)
  44                 goto out;
  45
  46         ret = send_set_req(p, SGNL_SRC_SEL, TLG_SIG_SRC_ANTENNA, &status);
  47         ret = send_set_req(p, TUNER_AUD_ANA_STD,
  48                                 p->radio_data.pre_emphasis, &status);
  49         ret |= send_set_req(p, TUNER_AUD_MODE,
  50                                 TLG_TUNE_TVAUDIO_MODE_STEREO, &status);
  51         ret |= send_set_req(p, AUDIO_SAMPLE_RATE_SEL,
  52                                 ATV_AUDIO_RATE_48K, &status);
  53         ret |= send_set_req(p, TUNE_FREQ_SELECT, TUNER_FREQ_MIN_FM, &status);
  54 out:
  55         return ret;
  56 }
  57
  58 #ifdef CONFIG_PM
  59 static int pm_fm_suspend(struct poseidon *p)
  60 {
  61         logpm(p);
  62         pm_alsa_suspend(p);
  63         usb_set_interface(p->udev, 0, 0);
  64         msleep(300);
  65         return 0;
  66 }
  67
  68 static int pm_fm_resume(struct poseidon *p)
  69 {
  70         logpm(p);
  71         poseidon_check_mode_radio(p);
  72         set_frequency(p, p->radio_data.fm_freq);
  73         pm_alsa_resume(p);
  74         return 0;
  75 }
  76 #endif
  77
  78 static int poseidon_fm_open(struct file *filp)
  79 {
  80         struct video_device *vfd = video_devdata(filp);
  81         struct poseidon *p = video_get_drvdata(vfd);
  82         int ret = 0;
  83
  84         if (!p)
  85                 return -1;
  86
  87         mutex_lock(&p->lock);
  88         if (p->state & POSEIDON_STATE_DISCONNECT) {
  89                 ret = -ENODEV;
  90                 goto out;
  91         }
  92
  93         if (p->state && !(p->state & POSEIDON_STATE_FM)) {
  94                 ret = -EBUSY;
  95                 goto out;
  96         }
  97
  98         usb_autopm_get_interface(p->interface);
  99         if (0 == p->state) {
 100                 /* default pre-emphasis */
 101                 if (p->radio_data.pre_emphasis == 0)
 102                         p->radio_data.pre_emphasis = TLG_TUNE_ASTD_FM_EUR;
 103                 set_debug_mode(vfd, debug_mode);
 104
 105                 ret = poseidon_check_mode_radio(p);
 106                 if (ret < 0) {
 107                         usb_autopm_put_interface(p->interface);
 108                         goto out;
 109                 }
 110                 p->state |= POSEIDON_STATE_FM;
 111         }
 112         p->radio_data.users++;
 113         kref_get(&p->kref);
 114         filp->private_data = p;
 115 out:
 116         mutex_unlock(&p->lock);
 117         return ret;
 118 }
 119
 120 static int poseidon_fm_close(struct file *filp)
 121 {
 122         struct poseidon *p = filp->private_data;
 123         struct radio_data *fm = &p->radio_data;
 124         uint32_t status;
 125
 126         mutex_lock(&p->lock);
 127         fm->users--;
 128         if (0 == fm->users)
 129                 p->state &= ~POSEIDON_STATE_FM;
 130
 131         if (fm->is_radio_streaming && filp == p->file_for_stream) {
 132                 fm->is_radio_streaming = 0;
 133                 send_set_req(p, PLAY_SERVICE, TLG_TUNE_PLAY_SVC_STOP, &status);
 134         }
 135         usb_autopm_put_interface(p->interface);
 136         mutex_unlock(&p->lock);
 137
 138         kref_put(&p->kref, poseidon_delete);
 139         filp->private_data = NULL;
 140         return 0;
 141 }
 142
 143 static int vidioc_querycap(struct file *file, void *priv,
 144                         struct v4l2_capability *v)
 145 {
 146         struct poseidon *p = file->private_data;
 147
 148         strlcpy(v->driver, "tele-radio", sizeof(v->driver));
 149         strlcpy(v->card, "Telegent Poseidon", sizeof(v->card));
 150         usb_make_path(p->udev, v->bus_info, sizeof(v->bus_info));
 151         v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
 152         return 0;
 153 }
 154
 155 static const struct v4l2_file_operations poseidon_fm_fops = {
 156         .owner         = THIS_MODULE,
 157         .open          = poseidon_fm_open,
 158         .release       = poseidon_fm_close,
 159         .ioctl         = video_ioctl2,
 160 };
 161
 162 static int tlg_fm_vidioc_g_tuner(struct file *file, void *priv,
 163                                  struct v4l2_tuner *vt)
 164 {
 165         struct tuner_fm_sig_stat_s fm_stat = {};
 166         int ret, status, count = 5;
 167         struct poseidon *p = file->private_data;
 168
 169         if (vt->index != 0)
 170                 return -EINVAL;
 171
 172         vt->type        = V4L2_TUNER_RADIO;
 173         vt->capability  = V4L2_TUNER_CAP_STEREO;
 174         vt->rangelow    = TUNER_FREQ_MIN_FM / 62500;
 175         vt->rangehigh   = TUNER_FREQ_MAX_FM / 62500;
 176         vt->rxsubchans  = V4L2_TUNER_SUB_STEREO;
 177         vt->audmode     = V4L2_TUNER_MODE_STEREO;
 178         vt->signal      = 0;
 179         vt->afc         = 0;
 180
 181         mutex_lock(&p->lock);
 182         ret = send_get_req(p, TUNER_STATUS, TLG_MODE_FM_RADIO,
 183                               &fm_stat, &status, sizeof(fm_stat));
 184
 185         while (fm_stat.sig_lock_busy && count-- && !ret) {
 186                 set_current_state(TASK_INTERRUPTIBLE);
 187                 schedule_timeout(HZ);
 188
 189                 ret = send_get_req(p, TUNER_STATUS, TLG_MODE_FM_RADIO,
 190                                   &fm_stat, &status, sizeof(fm_stat));
 191         }
 192         mutex_unlock(&p->lock);
 193
 194         if (ret || status) {
 195                 vt->signal = 0;
 196         } else if ((fm_stat.sig_present || fm_stat.sig_locked)
 197                         && fm_stat.sig_strength == 0) {
 198                 vt->signal = 0xffff;
 199         } else
 200                 vt->signal = (fm_stat.sig_strength * 255 / 10) << 8;
 201
 202         return 0;
 203 }
 204
 205 static int fm_get_freq(struct file *file, void *priv,
 206                        struct v4l2_frequency *argp)
 207 {
 208         struct poseidon *p = file->private_data;
 209
 210         argp->frequency = p->radio_data.fm_freq;
 211         return 0;
 212 }
 213
 214 static int set_frequency(struct poseidon *p, __u32 frequency)
 215 {
 216         __u32 freq ;
 217         int ret, status;
 218
 219         mutex_lock(&p->lock);
 220
 221         ret = send_set_req(p, TUNER_AUD_ANA_STD,
 222                                 p->radio_data.pre_emphasis, &status);
 223
 224         freq =  (frequency * 125) * 500 / 1000;/* kHZ */
 225         if (freq < TUNER_FREQ_MIN_FM/1000 || freq > TUNER_FREQ_MAX_FM/1000) {
 226                 ret = -EINVAL;
 227                 goto error;
 228         }
 229
 230         ret = send_set_req(p, TUNE_FREQ_SELECT, freq, &status);
 231         if (ret < 0)
 232                 goto error ;
 233         ret = send_set_req(p, TAKE_REQUEST, 0, &status);
 234
 235         set_current_state(TASK_INTERRUPTIBLE);
 236         schedule_timeout(HZ/4);
 237         if (!p->radio_data.is_radio_streaming) {
 238                 ret = send_set_req(p, TAKE_REQUEST, 0, &status);
 239                 ret = send_set_req(p, PLAY_SERVICE,
 240                                 TLG_TUNE_PLAY_SVC_START, &status);
 241                 p->radio_data.is_radio_streaming = 1;
 242         }
 243         p->radio_data.fm_freq = frequency;
 244 error:
 245         mutex_unlock(&p->lock);
 246         return ret;
 247 }
 248
 249 static int fm_set_freq(struct file *file, void *priv,
 250                        struct v4l2_frequency *argp)
 251 {
 252         struct poseidon *p = file->private_data;
 253
 254         p->file_for_stream  = file;
 255 #ifdef CONFIG_PM
 256         p->pm_suspend = pm_fm_suspend;
 257         p->pm_resume  = pm_fm_resume;
 258 #endif
 259         return set_frequency(p, argp->frequency);
 260 }
 261
 262 static int tlg_fm_vidioc_g_ctrl(struct file *file, void *priv,
 263                 struct v4l2_control *arg)
 264 {
 265         return 0;
 266 }
 267
 268 static int tlg_fm_vidioc_g_exts_ctrl(struct file *file, void *fh,
 269                                 struct v4l2_ext_controls *ctrls)
 270 {
 271         struct poseidon *p = file->private_data;
 272         int i;
 273
 274         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_FM_TX)
 275                 return -EINVAL;
 276
 277         for (i = 0; i < ctrls->count; i++) {
 278                 struct v4l2_ext_control *ctrl = ctrls->controls + i;
 279
 280                 if (ctrl->id != V4L2_CID_TUNE_PREEMPHASIS)
 281                         continue;
 282
 283                 if (i < MAX_PREEMPHASIS)
 284                         ctrl->value = p->radio_data.pre_emphasis;
 285         }
 286         return 0;
 287 }
 288
 289 static int tlg_fm_vidioc_s_exts_ctrl(struct file *file, void *fh,
 290                         struct v4l2_ext_controls *ctrls)
 291 {
 292         int i;
 293
 294         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_FM_TX)
 295                 return -EINVAL;
 296
 297         for (i = 0; i < ctrls->count; i++) {
 298                 struct v4l2_ext_control *ctrl = ctrls->controls + i;
 299
 300                 if (ctrl->id != V4L2_CID_TUNE_PREEMPHASIS)
 301                         continue;
 302
 303                 if (ctrl->value >= 0 && ctrl->value < MAX_PREEMPHASIS) {
 304                         struct poseidon *p = file->private_data;
 305                         int pre_emphasis = preemphasis[ctrl->value];
 306                         u32 status;
 307
 308                         send_set_req(p, TUNER_AUD_ANA_STD,
 309                                                 pre_emphasis, &status);
 310                         p->radio_data.pre_emphasis = pre_emphasis;
 311                 }
 312         }
 313         return 0;
 314 }
 315
 316 static int tlg_fm_vidioc_s_ctrl(struct file *file, void *priv,
 317                 struct v4l2_control *ctrl)
 318 {
 319         return 0;
 320 }
 321
 322 static int tlg_fm_vidioc_queryctrl(struct file *file, void *priv,
 323                 struct v4l2_queryctrl *ctrl)
 324 {
 325         if (!(ctrl->id & V4L2_CTRL_FLAG_NEXT_CTRL))
 326                 return -EINVAL;
 327
 328         ctrl->id &= ~V4L2_CTRL_FLAG_NEXT_CTRL;
 329         if (ctrl->id != V4L2_CID_TUNE_PREEMPHASIS) {
 330                 /* return the next supported control */
 331                 ctrl->id = V4L2_CID_TUNE_PREEMPHASIS;
 332                 v4l2_ctrl_query_fill(ctrl, V4L2_PREEMPHASIS_DISABLED,
 333                                         V4L2_PREEMPHASIS_75_uS, 1,
 334                                         V4L2_PREEMPHASIS_50_uS);
 335                 ctrl->flags = V4L2_CTRL_FLAG_UPDATE;
 336                 return 0;
 337         }
 338         return -EINVAL;
 339 }
 340
 341 static int tlg_fm_vidioc_querymenu(struct file *file, void *fh,
 342                                 struct v4l2_querymenu *qmenu)
 343 {
 344         return v4l2_ctrl_query_menu(qmenu, NULL, NULL);
 345 }
 346
 347 static int vidioc_s_tuner(struct file *file, void *priv, struct v4l2_tuner *vt)
 348 {
 349         return vt->index > 0 ? -EINVAL : 0;
 350 }
 351 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *va)
 352 {
 353         return (va->index != 0) ? -EINVAL : 0;
 354 }
 355
 356 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
 357 {
 358         a->index    = 0;
 359         a->mode    = 0;
 360         a->capability = V4L2_AUDCAP_STEREO;
 361         strcpy(a->name, "Radio");
 362         return 0;
 363 }
 364
 365 static int vidioc_s_input(struct file *filp, void *priv, u32 i)
 366 {
 367         return (i != 0) ? -EINVAL : 0;
 368 }
 369
 370 static int vidioc_g_input(struct file *filp, void *priv, u32 *i)
 371 {
 372         return (*i != 0) ? -EINVAL : 0;
 373 }
 374
 375 static const struct v4l2_ioctl_ops poseidon_fm_ioctl_ops = {
 376         .vidioc_querycap    = vidioc_querycap,
 377         .vidioc_g_audio     = vidioc_g_audio,
 378         .vidioc_s_audio     = vidioc_s_audio,
 379         .vidioc_g_input     = vidioc_g_input,
 380         .vidioc_s_input     = vidioc_s_input,
 381         .vidioc_queryctrl   = tlg_fm_vidioc_queryctrl,
 382         .vidioc_querymenu   = tlg_fm_vidioc_querymenu,
 383         .vidioc_g_ctrl      = tlg_fm_vidioc_g_ctrl,
 384         .vidioc_s_ctrl      = tlg_fm_vidioc_s_ctrl,
 385         .vidioc_s_ext_ctrls = tlg_fm_vidioc_s_exts_ctrl,
 386         .vidioc_g_ext_ctrls = tlg_fm_vidioc_g_exts_ctrl,
 387         .vidioc_s_tuner     = vidioc_s_tuner,
 388         .vidioc_g_tuner     = tlg_fm_vidioc_g_tuner,
 389         .vidioc_g_frequency = fm_get_freq,
 390         .vidioc_s_frequency = fm_set_freq,
 391 };
 392
 393 static struct video_device poseidon_fm_template = {
 394         .name       = "Telegent-Radio",
 395         .fops       = &poseidon_fm_fops,
 396         .minor      = -1,
 397         .release    = video_device_release,
 398         .ioctl_ops  = &poseidon_fm_ioctl_ops,
 399 };
 400
 401 int poseidon_fm_init(struct poseidon *p)
 402 {
 403         struct video_device *fm_dev;
 404
 405         fm_dev = vdev_init(p, &poseidon_fm_template);
 406         if (fm_dev == NULL)
 407                 return -1;
 408
 409         if (video_register_device(fm_dev, VFL_TYPE_RADIO, -1) < 0) {
 410                 video_device_release(fm_dev);
 411                 return -1;
 412         }
 413         p->radio_data.fm_dev = fm_dev;
 414         return 0;
 415 }
 416
 417 int poseidon_fm_exit(struct poseidon *p)
 418 {
 419         destroy_video_device(&p->radio_data.fm_dev);
 420         return 0;
 421 }