aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/usb/tlg2300/pd-alsa.c
blob: dd8fe100590ff88d6d202c7ecc112bb469e2bfac (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
#include <linux/kernel.h>
#include <linux/usb.h>
#include <linux/init.h>
#include <linux/sound.h>
#include <linux/spinlock.h>
#include <linux/soundcard.h>
#include <linux/vmalloc.h>
#include <linux/proc_fs.h>
#include <linux/module.h>
#include <linux/gfp.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/info.h>
#include <sound/initval.h>
#include <sound/control.h>
#include <media/v4l2-common.h>
#include "pd-common.h"
#include "vendorcmds.h"

static void complete_handler_audio(struct urb *urb);
#define AUDIO_EP	(0x83)
#define AUDIO_BUF_SIZE	(512)
#define PERIOD_SIZE	(1024 * 8)
#define PERIOD_MIN	(4)
#define PERIOD_MAX 	PERIOD_MIN

static struct snd_pcm_hardware snd_pd_hw_capture = {
	.info = SNDRV_PCM_INFO_BLOCK_TRANSFER |
		SNDRV_PCM_INFO_MMAP           |
		SNDRV_PCM_INFO_INTERLEAVED |
		SNDRV_PCM_INFO_MMAP_VALID,

	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	.rates = SNDRV_PCM_RATE_48000,

	.rate_min = 48000,
	.rate_max = 48000,
	.channels_min = 2,
	.channels_max = 2,
	.buffer_bytes_max = PERIOD_SIZE * PERIOD_MIN,
	.period_bytes_min = PERIOD_SIZE,
	.period_bytes_max = PERIOD_SIZE,
	.periods_min = PERIOD_MIN,
	.periods_max = PERIOD_MAX,
	/*
	.buffer_bytes_max = 62720 * 8,
	.period_bytes_min = 64,
	.period_bytes_max = 12544,
	.periods_min = 2,
	.periods_max = 98
	*/
};

static int snd_pd_capture_open(struct snd_pcm_substream *substream)
{
	struct poseidon *p = snd_pcm_substream_chip(substream);
	struct poseidon_audio *pa = &p->audio;
	struct snd_pcm_runtime *runtime = substream->runtime;

	if (!p)
		return -ENODEV;
	pa->users++;
	pa->card_close 		= 0;
	pa->capture_pcm_substream	= substream;
	runtime->private_data		= p;

	runtime->hw = snd_pd_hw_capture;
	snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
	usb_autopm_get_interface(p->interface);
	kref_get(&p->kref);
	return 0;
}

static int snd_pd_pcm_close(struct snd_pcm_substream *substream)
{
	struct poseidon *p = snd_pcm_substream_chip(substream);
	struct poseidon_audio *pa = &p->audio;

	pa->users--;
	pa->card_close 		= 1;
	usb_autopm_put_interface(p->interface);
	kref_put(&p->kref, poseidon_delete);
	return 0;
}

static int snd_pd_hw_capture_params(struct snd_pcm_substream *substream,
					struct snd_pcm_hw_params *hw_params)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	unsigned int size;

	size = params_buffer_bytes(hw_params);
	if (runtime->dma_area) {
		if (runtime->dma_bytes > size)
			return 0;
		vfree(runtime->dma_area);
	}
	runtime->dma_area = vmalloc(size);
	if (!runtime->dma_area)
		return -ENOMEM;
	else
		runtime->dma_bytes = size;
	return 0;
}

static int audio_buf_free(struct poseidon *p)
{
	struct poseidon_audio *pa = &p->audio;
	int i;

	for (i = 0; i < AUDIO_BUFS; i++)
		if (pa->urb_array[i])
			usb_kill_urb(pa->urb_array[i]);
	free_all_urb_generic(pa->urb_array, AUDIO_BUFS);
	logpm();
	return 0;
}

static int snd_pd_hw_capture_free(struct snd_pcm_substream *substream)
{
	struct poseidon *p = snd_pcm_substream_chip(substream);

	logpm();
	audio_buf_free(p);
	return 0;
}

static int snd_pd_prepare(struct snd_pcm_substream *substream)
{
	return 0;
}

#define AUDIO_TRAILER_SIZE	(16)
static inline void handle_audio_data(struct urb *urb, int *period_elapsed)
{
	struct poseidon_audio *pa = urb->context;
	struct snd_pcm_runtime *runtime = pa->capture_pcm_substream->runtime;

	int stride	= runtime->frame_bits >> 3;
	int len		= urb->actual_length / stride;
	unsigned char *cp	= urb->transfer_buffer;
	unsigned int oldptr	= pa->rcv_position;

	if (urb->actual_length == AUDIO_BUF_SIZE - 4)
		len -= (AUDIO_TRAILER_SIZE / stride);

	/* do the copy */
	if (oldptr + len >= runtime->buffer_size) {
		unsigned int cnt = runtime->buffer_size - oldptr;

		memcpy(runtime->dma_area + oldptr * stride, cp, cnt * stride);
		memcpy(runtime->dma_area, (cp + cnt * stride),
					(len * stride - cnt * stride));
	} else
		memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);

	/* update the statas */
	snd_pcm_stream_lock(pa->capture_pcm_substream);
	pa->rcv_position	+= len;
	if (pa->rcv_position >= runtime->buffer_size)
		pa->rcv_position -= runtime->buffer_size;

	pa->copied_position += (len);
	if (pa->copied_position >= runtime->period_size) {
		pa->copied_position -= runtime->period_size;
		*period_elapsed = 1;
	}
	snd_pcm_stream_unlock(pa->capture_pcm_substream);
}

static void complete_handler_audio(struct urb *urb)
{
	struct poseidon_audio *pa = urb->context;
	struct snd_pcm_substream *substream = pa->capture_pcm_substream;
	int    period_elapsed = 0;
	int    ret;

	if (1 == pa->card_close || pa->capture_stream != STREAM_ON)
		return;

	if (urb->status != 0) {
		/*if (urb->status == -ESHUTDOWN)*/
			return;
	}

	if (substream) {
		if (urb->actual_length) {
			handle_audio_data(urb, &period_elapsed);
			if (period_elapsed)
				snd_pcm_period_elapsed(substream);
		}
	}

	ret = usb_submit_urb(urb, GFP_ATOMIC);
	if (ret < 0)
		log("audio urb failed (errcod = %i)", ret);
	return;
}

static int fire_audio_urb(struct poseidon *p)
{
	int i, ret = 0;
	struct poseidon_audio *pa = &p->audio;

	alloc_bulk_urbs_generic(pa->urb_array, AUDIO_BUFS,
			p->udev, AUDIO_EP,
			AUDIO_BUF_SIZE, GFP_ATOMIC,
			complete_handler_audio, pa);

	for (i = 0; i < AUDIO_BUFS; i++) {
		ret = usb_submit_urb(pa->urb_array[i], GFP_KERNEL);
		if (ret)
			log("urb err : %d", ret);
	}
	log();
	return ret;
}

static int snd_pd_capture_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct poseidon *p = snd_pcm_substream_chip(substream);
	struct poseidon_audio *pa = &p->audio;

	if (debug_mode)
		log("cmd %d, audio stat : %d\n", cmd, pa->capture_stream);

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_START:
		if (pa->capture_stream == STREAM_ON)
			return 0;

		pa->rcv_position = pa->copied_position = 0;
		pa->capture_stream = STREAM_ON;

		if (in_hibernation(p))
			return 0;
		fire_audio_urb(p);
		return 0;

	case SNDRV_PCM_TRIGGER_SUSPEND:
		pa->capture_stream = STREAM_SUSPEND;
		return 0;
	case SNDRV_PCM_TRIGGER_STOP:
		pa->capture_stream = STREAM_OFF;
		return 0;
	default:
		return -EINVAL;
	}
}

static snd_pcm_uframes_t
snd_pd_capture_pointer(struct snd_pcm_substream *substream)
{
	struct poseidon *p = snd_pcm_substream_chip(substream);
	struct poseidon_audio *pa = &p->audio;
	return pa->rcv_position;
}

static struct page *snd_pcm_pd_get_page(struct snd_pcm_substream *subs,
					     unsigned long offset)
{
	void *pageptr = subs->runtime->dma_area + offset;
	return vmalloc_to_page(pageptr);
}

static struct snd_pcm_ops pcm_capture_ops = {
	.open      = snd_pd_capture_open,
	.close     = snd_pd_pcm_close,
	.ioctl     = snd_pcm_lib_ioctl,
	.hw_params = snd_pd_hw_capture_params,
	.hw_free   = snd_pd_hw_capture_free,
	.prepare   = snd_pd_prepare,
	.trigger   = snd_pd_capture_trigger,
	.pointer   = snd_pd_capture_pointer,
	.page      = snd_pcm_pd_get_page,
};

#ifdef CONFIG_PM
int pm_alsa_suspend(struct poseidon *p)
{
	logpm(p);
	audio_buf_free(p);
	return 0;
}

int pm_alsa_resume(struct poseidon *p)
{
	logpm(p);
	fire_audio_urb(p);
	return 0;
}
#endif

int poseidon_audio_init(struct poseidon *p)
{
	struct poseidon_audio *pa = &p->audio;
	struct snd_card *card;
	struct snd_pcm *pcm;
	int ret;

	ret = snd_card_new(&p->interface->dev, -1, "Telegent",
			   THIS_MODULE, 0, &card);
	if (ret != 0)
		return ret;

	ret = snd_pcm_new(card, "poseidon audio", 0, 0, 1, &pcm);
	if (ret < 0) {
		snd_card_free(card);
		return ret;
	}
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
	pcm->info_flags   = 0;
	pcm->private_data = p;
	strcpy(pcm->name, "poseidon audio capture");

	strcpy(card->driver, "ALSA driver");
	strcpy(card->shortname, "poseidon Audio");
	strcpy(card->longname, "poseidon ALSA Audio");

	if (snd_card_register(card)) {
		snd_card_free(card);
		return -ENOMEM;
	}
	pa->card = card;
	return 0;
}

int poseidon_audio_free(struct poseidon *p)
{
	struct poseidon_audio *pa = &p->audio;

	if (pa->card)
		snd_card_free(pa->card);
	return 0;
}