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