aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/brcm2708/patches-3.10/0061-Merge-pull-request-286-from-martinezjavier-rpi-3.6.y.patch
blob: 9d8786a6eedfaa040c21bef0d2eb27bfb95dc433 (plain)
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
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
From 5d42dfcf42ba987a03d8b5f2dfa30e9cb2dc4721 Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Fri, 26 Apr 2013 10:08:31 -0700
Subject: [PATCH 061/174] Merge pull request #286 from
 martinezjavier/rpi-3.6.y-dev

add mmap support and some cleanups to bcm2835 ALSA driver
---
 sound/arm/bcm2835-pcm.c   | 69 ++++++++++++++++++++++--------------
 sound/arm/bcm2835-vchiq.c | 89 +++++++++++++++++++++++++++++++++--------------
 sound/arm/bcm2835.c       | 34 +++++++++---------
 sound/arm/bcm2835.h       |  2 ++
 4 files changed, 124 insertions(+), 70 deletions(-)

--- a/sound/arm/bcm2835-pcm.c
+++ b/sound/arm/bcm2835-pcm.c
@@ -19,7 +19,8 @@
 
 /* hardware definition */
 static struct snd_pcm_hardware snd_bcm2835_playback_hw = {
-	.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER),
+	.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
+		 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID),
 	.formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 	.rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 	.rate_min = 8000,
@@ -251,6 +252,12 @@ static int snd_bcm2835_pcm_prepare(struc
 
 	audio_info(" .. IN\n");
 
+	memset(&alsa_stream->pcm_indirect, 0, sizeof(alsa_stream->pcm_indirect));
+
+	alsa_stream->pcm_indirect.hw_buffer_size =
+	alsa_stream->pcm_indirect.sw_buffer_size =
+		snd_pcm_lib_buffer_bytes(substream);
+
 	alsa_stream->buffer_size = snd_pcm_lib_buffer_bytes(substream);
 	alsa_stream->period_size = snd_pcm_lib_period_bytes(substream);
 	alsa_stream->pos = 0;
@@ -263,6 +270,32 @@ static int snd_bcm2835_pcm_prepare(struc
 	return 0;
 }
 
+static void snd_bcm2835_pcm_transfer(struct snd_pcm_substream *substream,
+				    struct snd_pcm_indirect *rec, size_t bytes)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	bcm2835_alsa_stream_t *alsa_stream = runtime->private_data;
+	void *src = (void *)(substream->runtime->dma_area + rec->sw_data);
+	int err;
+
+	err = bcm2835_audio_write(alsa_stream, bytes, src);
+	if (err)
+		audio_error(" Failed to transfer to alsa device (%d)\n", err);
+
+}
+
+static int snd_bcm2835_pcm_ack(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	bcm2835_alsa_stream_t *alsa_stream = runtime->private_data;
+	struct snd_pcm_indirect *pcm_indirect = &alsa_stream->pcm_indirect;
+
+	pcm_indirect->hw_queue_size = runtime->hw.buffer_bytes_max;
+	snd_pcm_indirect_playback_transfer(substream, pcm_indirect,
+					   snd_bcm2835_pcm_transfer);
+	return 0;
+}
+
 /* trigger callback */
 static int snd_bcm2835_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 {
@@ -279,6 +312,11 @@ static int snd_bcm2835_pcm_trigger(struc
 		if (!alsa_stream->running) {
 			err = bcm2835_audio_start(alsa_stream);
 			if (err == 0) {
+				alsa_stream->pcm_indirect.hw_io =
+				alsa_stream->pcm_indirect.hw_data =
+					bytes_to_frames(runtime,
+							alsa_stream->pos);
+				substream->ops->ack(substream);
 				alsa_stream->running = 1;
 				alsa_stream->draining = 1;
 			} else {
@@ -327,30 +365,9 @@ snd_bcm2835_pcm_pointer(struct snd_pcm_s
 		      alsa_stream->pos);
 
 	audio_info(" .. OUT\n");
-	return bytes_to_frames(runtime, alsa_stream->pos);
-}
-
-static int snd_bcm2835_pcm_copy(struct snd_pcm_substream *substream,
-				int channel, snd_pcm_uframes_t pos, void *src,
-				snd_pcm_uframes_t count)
-{
-	int ret;
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	bcm2835_alsa_stream_t *alsa_stream = runtime->private_data;
-
-	audio_info(" .. IN\n");
-	audio_debug("copy.......... (%d) hwptr=%d appl=%d pos=%d\n",
-		      frames_to_bytes(runtime, count), frames_to_bytes(runtime,
-								       runtime->
-								       status->
-								       hw_ptr),
-		      frames_to_bytes(runtime, runtime->control->appl_ptr),
-		      alsa_stream->pos);
-	ret =
-	    bcm2835_audio_write(alsa_stream, frames_to_bytes(runtime, count),
-				src);
-	audio_info(" .. OUT\n");
-	return ret;
+	return snd_pcm_indirect_playback_pointer(substream,
+						 &alsa_stream->pcm_indirect,
+						 alsa_stream->pos);
 }
 
 static int snd_bcm2835_pcm_lib_ioctl(struct snd_pcm_substream *substream,
@@ -372,7 +389,7 @@ static struct snd_pcm_ops snd_bcm2835_pl
 	.prepare = snd_bcm2835_pcm_prepare,
 	.trigger = snd_bcm2835_pcm_trigger,
 	.pointer = snd_bcm2835_pcm_pointer,
-	.copy = snd_bcm2835_pcm_copy,
+	.ack = snd_bcm2835_pcm_ack,
 };
 
 /* create a pcm device */
--- a/sound/arm/bcm2835-vchiq.c
+++ b/sound/arm/bcm2835-vchiq.c
@@ -27,6 +27,7 @@
 #include <linux/delay.h>
 #include <linux/atomic.h>
 #include <linux/module.h>
+#include <linux/completion.h>
 
 #include "bcm2835.h"
 
@@ -37,6 +38,10 @@
 
 /* ---- Private Constants and Types ------------------------------------------ */
 
+#define BCM2835_AUDIO_STOP           0
+#define BCM2835_AUDIO_START          1
+#define BCM2835_AUDIO_WRITE          2
+
 /* Logging macros (for remapping to other logging mechanisms, i.e., printf) */
 #ifdef AUDIO_DEBUG_ENABLE
 	#define LOG_ERR( fmt, arg... )   pr_err( "%s:%d " fmt, __func__, __LINE__, ##arg)
@@ -53,7 +58,7 @@
 typedef struct opaque_AUDIO_INSTANCE_T {
 	uint32_t num_connections;
 	VCHI_SERVICE_HANDLE_T vchi_handle[VCHI_MAX_NUM_CONNECTIONS];
-	struct semaphore msg_avail_event;
+	struct completion msg_avail_comp;
 	struct mutex vchi_mutex;
 	bcm2835_alsa_stream_t *alsa_stream;
 	int32_t result;
@@ -70,27 +75,35 @@ bool force_bulk = false;
 
 static int bcm2835_audio_stop_worker(bcm2835_alsa_stream_t * alsa_stream);
 static int bcm2835_audio_start_worker(bcm2835_alsa_stream_t * alsa_stream);
+static int bcm2835_audio_write_worker(bcm2835_alsa_stream_t *alsa_stream,
+				      uint32_t count, void *src);
 
 typedef struct {
 	struct work_struct my_work;
 	bcm2835_alsa_stream_t *alsa_stream;
-	int x;
+	int cmd;
+	void *src;
+	uint32_t count;
 } my_work_t;
 
 static void my_wq_function(struct work_struct *work)
 {
 	my_work_t *w = (my_work_t *) work;
 	int ret = -9;
-	LOG_DBG(" .. IN %p:%d\n", w->alsa_stream, w->x);
-	switch (w->x) {
-	case 1:
+	LOG_DBG(" .. IN %p:%d\n", w->alsa_stream, w->cmd);
+	switch (w->cmd) {
+	case BCM2835_AUDIO_START:
 		ret = bcm2835_audio_start_worker(w->alsa_stream);
 		break;
-	case 2:
+	case BCM2835_AUDIO_STOP:
 		ret = bcm2835_audio_stop_worker(w->alsa_stream);
 		break;
+	case BCM2835_AUDIO_WRITE:
+		ret = bcm2835_audio_write_worker(w->alsa_stream, w->count,
+						 w->src);
+		break;
 	default:
-		LOG_ERR(" Unexpected work: %p:%d\n", w->alsa_stream, w->x);
+		LOG_ERR(" Unexpected work: %p:%d\n", w->alsa_stream, w->cmd);
 		break;
 	}
 	kfree((void *)work);
@@ -107,7 +120,7 @@ int bcm2835_audio_start(bcm2835_alsa_str
 		if (work) {
 			INIT_WORK((struct work_struct *)work, my_wq_function);
 			work->alsa_stream = alsa_stream;
-			work->x = 1;
+			work->cmd = BCM2835_AUDIO_START;
 			if (queue_work
 			    (alsa_stream->my_wq, (struct work_struct *)work))
 				ret = 0;
@@ -128,7 +141,31 @@ int bcm2835_audio_stop(bcm2835_alsa_stre
 		if (work) {
 			INIT_WORK((struct work_struct *)work, my_wq_function);
 			work->alsa_stream = alsa_stream;
-			work->x = 2;
+			work->cmd = BCM2835_AUDIO_STOP;
+			if (queue_work
+			    (alsa_stream->my_wq, (struct work_struct *)work))
+				ret = 0;
+		} else
+			LOG_ERR(" .. Error: NULL work kmalloc\n");
+	}
+	LOG_DBG(" .. OUT %d\n", ret);
+	return ret;
+}
+
+int bcm2835_audio_write(bcm2835_alsa_stream_t *alsa_stream,
+			uint32_t count, void *src)
+{
+	int ret = -1;
+	LOG_DBG(" .. IN\n");
+	if (alsa_stream->my_wq) {
+		my_work_t *work = kmalloc(sizeof(my_work_t), GFP_ATOMIC);
+		 /*--- Queue some work (item 1) ---*/
+		if (work) {
+			INIT_WORK((struct work_struct *)work, my_wq_function);
+			work->alsa_stream = alsa_stream;
+			work->cmd = BCM2835_AUDIO_WRITE;
+			work->src = src;
+			work->count = count;
 			if (queue_work
 			    (alsa_stream->my_wq, (struct work_struct *)work))
 				ret = 0;
@@ -178,7 +215,7 @@ static void audio_vchi_callback(void *pa
 		    (" .. instance=%p, m.type=VC_AUDIO_MSG_TYPE_RESULT, success=%d\n",
 		     instance, m.u.result.success);
 		instance->result = m.u.result.success;
-		up(&instance->msg_avail_event);
+		complete(&instance->msg_avail_comp);
 	} else if (m.type == VC_AUDIO_MSG_TYPE_COMPLETE) {
 		irq_handler_t callback = (irq_handler_t) m.u.complete.callback;
 		LOG_DBG
@@ -435,8 +472,8 @@ static int bcm2835_audio_set_ctls_chan(b
 	m.u.control.dest = chip->dest;
 	m.u.control.volume = chip->volume;
 
-	/* Create the message available event */
-	sema_init(&instance->msg_avail_event, 0);
+	/* Create the message available completion */
+	init_completion(&instance->msg_avail_comp);
 
 	/* Send the message to the videocore */
 	success = vchi_msg_queue(instance->vchi_handle[0],
@@ -452,11 +489,10 @@ static int bcm2835_audio_set_ctls_chan(b
 	}
 
 	/* We are expecting a reply from the videocore */
-	if (down_interruptible(&instance->msg_avail_event)) {
+	ret = wait_for_completion_interruptible(&instance->msg_avail_comp);
+	if (ret) {
 		LOG_ERR("%s: failed on waiting for event (status=%d)\n",
 			__func__, success);
-
-		ret = -1;
 		goto unlock;
 	}
 
@@ -539,8 +575,8 @@ int bcm2835_audio_set_params(bcm2835_als
 	m.u.config.samplerate = samplerate;
 	m.u.config.bps = bps;
 
-	/* Create the message available event */
-	sema_init(&instance->msg_avail_event, 0);
+	/* Create the message available completion */
+	init_completion(&instance->msg_avail_comp);
 
 	/* Send the message to the videocore */
 	success = vchi_msg_queue(instance->vchi_handle[0],
@@ -556,11 +592,10 @@ int bcm2835_audio_set_params(bcm2835_als
 	}
 
 	/* We are expecting a reply from the videocore */
-	if (down_interruptible(&instance->msg_avail_event)) {
+	ret = wait_for_completion_interruptible(&instance->msg_avail_comp);
+	if (ret) {
 		LOG_ERR("%s: failed on waiting for event (status=%d)\n",
 			__func__, success);
-
-		ret = -1;
 		goto unlock;
 	}
 
@@ -688,8 +723,8 @@ int bcm2835_audio_close(bcm2835_alsa_str
 
 	m.type = VC_AUDIO_MSG_TYPE_CLOSE;
 
-	/* Create the message available event */
-	sema_init(&instance->msg_avail_event, 0);
+	/* Create the message available completion */
+	init_completion(&instance->msg_avail_comp);
 
 	/* Send the message to the videocore */
 	success = vchi_msg_queue(instance->vchi_handle[0],
@@ -702,11 +737,11 @@ int bcm2835_audio_close(bcm2835_alsa_str
 		ret = -1;
 		goto unlock;
 	}
-	if (down_interruptible(&instance->msg_avail_event)) {
+
+	ret = wait_for_completion_interruptible(&instance->msg_avail_comp);
+	if (ret) {
 		LOG_ERR("%s: failed on waiting for event (status=%d)",
 			__func__, success);
-
-		ret = -1;
 		goto unlock;
 	}
 	if (instance->result != 0) {
@@ -732,8 +767,8 @@ unlock:
 	return ret;
 }
 
-int bcm2835_audio_write(bcm2835_alsa_stream_t * alsa_stream, uint32_t count,
-			void *src)
+int bcm2835_audio_write_worker(bcm2835_alsa_stream_t *alsa_stream,
+			       uint32_t count, void *src)
 {
 	VC_AUDIO_MSG_T m;
 	AUDIO_INSTANCE_T *instance = alsa_stream->instance;
--- a/sound/arm/bcm2835.c
+++ b/sound/arm/bcm2835.c
@@ -110,20 +110,20 @@ static int snd_bcm2835_alsa_probe(struct
 
 	err = snd_bcm2835_create(g_card, pdev, &chip);
 	if (err < 0) {
-		printk(KERN_ERR "Failed to create bcm2835 chip\n");
+		dev_err(&pdev->dev, "Failed to create bcm2835 chip\n");
 		goto out_bcm2835_create;
 	}
 
 	g_chip = chip;
 	err = snd_bcm2835_new_pcm(chip);
 	if (err < 0) {
-		printk(KERN_ERR "Failed to create new BCM2835 pcm device\n");
+		dev_err(&pdev->dev, "Failed to create new BCM2835 pcm device\n");
 		goto out_bcm2835_new_pcm;
 	}
 
 	err = snd_bcm2835_new_ctl(chip);
 	if (err < 0) {
-		printk(KERN_ERR "Failed to create new BCM2835 ctl\n");
+		dev_err(&pdev->dev, "Failed to create new BCM2835 ctl\n");
 		goto out_bcm2835_new_ctl;
 	}
 
@@ -139,14 +139,14 @@ add_register_map:
 	if (dev == 0) {
 		err = snd_card_register(card);
 		if (err < 0) {
-			printk(KERN_ERR
-			       "Failed to register bcm2835 ALSA card \n");
+			dev_err(&pdev->dev,
+				"Failed to register bcm2835 ALSA card \n");
 			goto out_card_register;
 		}
 		platform_set_drvdata(pdev, card);
-		printk(KERN_INFO "bcm2835 ALSA card created!\n");
+		audio_info("bcm2835 ALSA card created!\n");
 	} else {
-		printk(KERN_INFO "bcm2835 ALSA chip created!\n");
+		audio_info("bcm2835 ALSA chip created!\n");
 		platform_set_drvdata(pdev, (void *)dev);
 	}
 
@@ -160,11 +160,11 @@ out_bcm2835_new_pcm:
 out_bcm2835_create:
 	BUG_ON(!g_card);
 	if (snd_card_free(g_card))
-		printk(KERN_ERR "Failed to free Registered alsa card\n");
+		dev_err(&pdev->dev, "Failed to free Registered alsa card\n");
 	g_card = NULL;
 out:
 	dev = SNDRV_CARDS;	/* stop more avail_substreams from being probed */
-	printk(KERN_ERR "BCM2835 ALSA Probe failed !!\n");
+	dev_err(&pdev->dev, "BCM2835 ALSA Probe failed !!\n");
 	return err;
 }
 
@@ -326,49 +326,49 @@ static int bcm2835_alsa_device_init(void
 	int err;
 	err = platform_driver_register(&bcm2835_alsa0_driver);
 	if (err) {
-		printk("Error registering bcm2835_alsa0_driver %d .\n", err);
+		pr_err("Error registering bcm2835_alsa0_driver %d .\n", err);
 		goto out;
 	}
 
 	err = platform_driver_register(&bcm2835_alsa1_driver);
 	if (err) {
-		printk("Error registering bcm2835_alsa1_driver %d .\n", err);
+		pr_err("Error registering bcm2835_alsa0_driver %d .\n", err);
 		goto unregister_0;
 	}
 
 	err = platform_driver_register(&bcm2835_alsa2_driver);
 	if (err) {
-		printk("Error registering bcm2835_alsa2_driver %d .\n", err);
+		pr_err("Error registering bcm2835_alsa0_driver %d .\n", err);
 		goto unregister_1;
 	}
 
 	err = platform_driver_register(&bcm2835_alsa3_driver);
 	if (err) {
-		printk("Error registering bcm2835_alsa3_driver %d .\n", err);
+		pr_err("Error registering bcm2835_alsa0_driver %d .\n", err);
 		goto unregister_2;
 	}
 
 	err = platform_driver_register(&bcm2835_alsa4_driver);
 	if (err) {
-		printk("Error registering bcm2835_alsa4_driver %d .\n", err);
+		pr_err("Error registering bcm2835_alsa0_driver %d .\n", err);
 		goto unregister_3;
 	}
 
 	err = platform_driver_register(&bcm2835_alsa5_driver);
 	if (err) {
-		printk("Error registering bcm2835_alsa5_driver %d .\n", err);
+		pr_err("Error registering bcm2835_alsa0_driver %d .\n", err);
 		goto unregister_4;
 	}
 
 	err = platform_driver_register(&bcm2835_alsa6_driver);
 	if (err) {
-		printk("Error registering bcm2835_alsa6_driver %d .\n", err);
+		pr_err("Error registering bcm2835_alsa0_driver %d .\n", err);
 		goto unregister_5;
 	}
 
 	err = platform_driver_register(&bcm2835_alsa7_driver);
 	if (err) {
-		printk("Error registering bcm2835_alsa7_driver %d .\n", err);
+		pr_err("Error registering bcm2835_alsa0_driver %d .\n", err);
 		goto unregister_6;
 	}
 
--- a/sound/arm/bcm2835.h
+++ b/sound/arm/bcm2835.h
@@ -23,6 +23,7 @@
 #include <sound/initval.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
+#include <sound/pcm-indirect.h>
 #include <linux/workqueue.h>
 
 /*
@@ -110,6 +111,7 @@ typedef struct bcm2835_chip {
 typedef struct bcm2835_alsa_stream {
 	bcm2835_chip_t *chip;
 	struct snd_pcm_substream *substream;
+	struct snd_pcm_indirect pcm_indirect;
 
 	struct semaphore buffers_update_sem;
 	struct semaphore control_sem;