diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-04 10:58:25 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-04 10:58:25 -0400 |
commit | 1046a2c428bedd64c960dcfd0c57cc69a82fea2f (patch) | |
tree | d34b83e0ac61b51305cece031f7ff49579e3fe76 /drivers/staging/media/go7007/snd-go7007.c | |
parent | 46e85f5f1c2a1d106c1ec0fa2a06280276b8e052 (diff) | |
parent | b3f4e1eba45eda5d1213810ef3bc53e5247df2df (diff) |
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (144 commits)
[media] saa7134.h: Suppress compiler warnings when CONFIG_VIDEO_SAA7134_RC is not set
[media] it913x [VER 1.07] Support for single ITE 9135 devices
[media] Support for Terratec G1
[media] cx25821: off by one in cx25821_vidioc_s_input()
[media] media: tea5764: reconcile Kconfig symbol and macro
[media] omap_vout: Add poll() support
[media] omap3isp: preview: Add crop support on the sink pad
[media] omap3isp: preview: Rename min/max input/output sizes defines
[media] omap3isp: preview: Remove horizontal averager support
[media] omap3isp: Report the ISP revision through the media controller API
[media] omap3isp: ccdc: remove redundant operation
[media] omap3isp: Fix memory leaks in initialization error paths
[media] omap3isp: Add missing mutex_destroy() calls
[media] omap3isp: Move *_init_entities() functions to the init/cleanup section
[media] omap3isp: Move media_entity_cleanup() from unregister() to cleanup()
[media] MFC: Change MFC firmware binary name
[media] vb2: add vb2_get_unmapped_area in vb2 core
[media] v4l: Add v4l2 subdev driver for S5K6AAFX sensor
[media] v4l: Add AUTO option for the V4L2_CID_POWER_LINE_FREQUENCY control
[media] media: ov6650: stylistic improvements
...
Diffstat (limited to 'drivers/staging/media/go7007/snd-go7007.c')
-rw-r--r-- | drivers/staging/media/go7007/snd-go7007.c | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/drivers/staging/media/go7007/snd-go7007.c b/drivers/staging/media/go7007/snd-go7007.c new file mode 100644 index 00000000000..deac938d850 --- /dev/null +++ b/drivers/staging/media/go7007/snd-go7007.c | |||
@@ -0,0 +1,306 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2005-2006 Micronas USA Inc. | ||
3 | * | ||
4 | * This program is free software; you can redistribute it and/or modify | ||
5 | * it under the terms of the GNU General Public License (Version 2) as | ||
6 | * published by the Free Software Foundation. | ||
7 | * | ||
8 | * This program is distributed in the hope that it will be useful, | ||
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
11 | * GNU General Public License for more details. | ||
12 | * | ||
13 | * You should have received a copy of the GNU General Public License | ||
14 | * along with this program; if not, write to the Free Software Foundation, | ||
15 | * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. | ||
16 | */ | ||
17 | |||
18 | #include <linux/kernel.h> | ||
19 | #include <linux/module.h> | ||
20 | #include <linux/moduleparam.h> | ||
21 | #include <linux/init.h> | ||
22 | #include <linux/spinlock.h> | ||
23 | #include <linux/delay.h> | ||
24 | #include <linux/sched.h> | ||
25 | #include <linux/vmalloc.h> | ||
26 | #include <linux/time.h> | ||
27 | #include <linux/mm.h> | ||
28 | #include <linux/i2c.h> | ||
29 | #include <linux/mutex.h> | ||
30 | #include <linux/uaccess.h> | ||
31 | #include <linux/slab.h> | ||
32 | #include <asm/system.h> | ||
33 | #include <sound/core.h> | ||
34 | #include <sound/pcm.h> | ||
35 | #include <sound/initval.h> | ||
36 | |||
37 | #include "go7007-priv.h" | ||
38 | |||
39 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; | ||
40 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; | ||
41 | static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; | ||
42 | |||
43 | module_param_array(index, int, NULL, 0444); | ||
44 | module_param_array(id, charp, NULL, 0444); | ||
45 | module_param_array(enable, bool, NULL, 0444); | ||
46 | MODULE_PARM_DESC(index, "Index value for the go7007 audio driver"); | ||
47 | MODULE_PARM_DESC(id, "ID string for the go7007 audio driver"); | ||
48 | MODULE_PARM_DESC(enable, "Enable for the go7007 audio driver"); | ||
49 | |||
50 | struct go7007_snd { | ||
51 | struct snd_card *card; | ||
52 | struct snd_pcm *pcm; | ||
53 | struct snd_pcm_substream *substream; | ||
54 | spinlock_t lock; | ||
55 | int w_idx; | ||
56 | int hw_ptr; | ||
57 | int avail; | ||
58 | int capturing; | ||
59 | }; | ||
60 | |||
61 | static struct snd_pcm_hardware go7007_snd_capture_hw = { | ||
62 | .info = (SNDRV_PCM_INFO_MMAP | | ||
63 | SNDRV_PCM_INFO_INTERLEAVED | | ||
64 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | ||
65 | SNDRV_PCM_INFO_MMAP_VALID), | ||
66 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | ||
67 | .rates = SNDRV_PCM_RATE_48000, | ||
68 | .rate_min = 48000, | ||
69 | .rate_max = 48000, | ||
70 | .channels_min = 2, | ||
71 | .channels_max = 2, | ||
72 | .buffer_bytes_max = (128*1024), | ||
73 | .period_bytes_min = 4096, | ||
74 | .period_bytes_max = (128*1024), | ||
75 | .periods_min = 1, | ||
76 | .periods_max = 32, | ||
77 | }; | ||
78 | |||
79 | static void parse_audio_stream_data(struct go7007 *go, u8 *buf, int length) | ||
80 | { | ||
81 | struct go7007_snd *gosnd = go->snd_context; | ||
82 | struct snd_pcm_runtime *runtime = gosnd->substream->runtime; | ||
83 | int frames = bytes_to_frames(runtime, length); | ||
84 | |||
85 | spin_lock(&gosnd->lock); | ||
86 | gosnd->hw_ptr += frames; | ||
87 | if (gosnd->hw_ptr >= runtime->buffer_size) | ||
88 | gosnd->hw_ptr -= runtime->buffer_size; | ||
89 | gosnd->avail += frames; | ||
90 | spin_unlock(&gosnd->lock); | ||
91 | if (gosnd->w_idx + length > runtime->dma_bytes) { | ||
92 | int cpy = runtime->dma_bytes - gosnd->w_idx; | ||
93 | |||
94 | memcpy(runtime->dma_area + gosnd->w_idx, buf, cpy); | ||
95 | length -= cpy; | ||
96 | buf += cpy; | ||
97 | gosnd->w_idx = 0; | ||
98 | } | ||
99 | memcpy(runtime->dma_area + gosnd->w_idx, buf, length); | ||
100 | gosnd->w_idx += length; | ||
101 | spin_lock(&gosnd->lock); | ||
102 | if (gosnd->avail < runtime->period_size) { | ||
103 | spin_unlock(&gosnd->lock); | ||
104 | return; | ||
105 | } | ||
106 | gosnd->avail -= runtime->period_size; | ||
107 | spin_unlock(&gosnd->lock); | ||
108 | if (gosnd->capturing) | ||
109 | snd_pcm_period_elapsed(gosnd->substream); | ||
110 | } | ||
111 | |||
112 | static int go7007_snd_hw_params(struct snd_pcm_substream *substream, | ||
113 | struct snd_pcm_hw_params *hw_params) | ||
114 | { | ||
115 | struct go7007 *go = snd_pcm_substream_chip(substream); | ||
116 | unsigned int bytes; | ||
117 | |||
118 | bytes = params_buffer_bytes(hw_params); | ||
119 | if (substream->runtime->dma_bytes > 0) | ||
120 | vfree(substream->runtime->dma_area); | ||
121 | substream->runtime->dma_bytes = 0; | ||
122 | substream->runtime->dma_area = vmalloc(bytes); | ||
123 | if (substream->runtime->dma_area == NULL) | ||
124 | return -ENOMEM; | ||
125 | substream->runtime->dma_bytes = bytes; | ||
126 | go->audio_deliver = parse_audio_stream_data; | ||
127 | return 0; | ||
128 | } | ||
129 | |||
130 | static int go7007_snd_hw_free(struct snd_pcm_substream *substream) | ||
131 | { | ||
132 | struct go7007 *go = snd_pcm_substream_chip(substream); | ||
133 | |||
134 | go->audio_deliver = NULL; | ||
135 | if (substream->runtime->dma_bytes > 0) | ||
136 | vfree(substream->runtime->dma_area); | ||
137 | substream->runtime->dma_bytes = 0; | ||
138 | return 0; | ||
139 | } | ||
140 | |||
141 | static int go7007_snd_capture_open(struct snd_pcm_substream *substream) | ||
142 | { | ||
143 | struct go7007 *go = snd_pcm_substream_chip(substream); | ||
144 | struct go7007_snd *gosnd = go->snd_context; | ||
145 | unsigned long flags; | ||
146 | int r; | ||
147 | |||
148 | spin_lock_irqsave(&gosnd->lock, flags); | ||
149 | if (gosnd->substream == NULL) { | ||
150 | gosnd->substream = substream; | ||
151 | substream->runtime->hw = go7007_snd_capture_hw; | ||
152 | r = 0; | ||
153 | } else | ||
154 | r = -EBUSY; | ||
155 | spin_unlock_irqrestore(&gosnd->lock, flags); | ||
156 | return r; | ||
157 | } | ||
158 | |||
159 | static int go7007_snd_capture_close(struct snd_pcm_substream *substream) | ||
160 | { | ||
161 | struct go7007 *go = snd_pcm_substream_chip(substream); | ||
162 | struct go7007_snd *gosnd = go->snd_context; | ||
163 | |||
164 | gosnd->substream = NULL; | ||
165 | return 0; | ||
166 | } | ||
167 | |||
168 | static int go7007_snd_pcm_prepare(struct snd_pcm_substream *substream) | ||
169 | { | ||
170 | return 0; | ||
171 | } | ||
172 | |||
173 | static int go7007_snd_pcm_trigger(struct snd_pcm_substream *substream, int cmd) | ||
174 | { | ||
175 | struct go7007 *go = snd_pcm_substream_chip(substream); | ||
176 | struct go7007_snd *gosnd = go->snd_context; | ||
177 | |||
178 | switch (cmd) { | ||
179 | case SNDRV_PCM_TRIGGER_START: | ||
180 | /* Just set a flag to indicate we should signal ALSA when | ||
181 | * sound comes in */ | ||
182 | gosnd->capturing = 1; | ||
183 | return 0; | ||
184 | case SNDRV_PCM_TRIGGER_STOP: | ||
185 | gosnd->hw_ptr = gosnd->w_idx = gosnd->avail = 0; | ||
186 | gosnd->capturing = 0; | ||
187 | return 0; | ||
188 | default: | ||
189 | return -EINVAL; | ||
190 | } | ||
191 | } | ||
192 | |||
193 | static snd_pcm_uframes_t go7007_snd_pcm_pointer(struct snd_pcm_substream *substream) | ||
194 | { | ||
195 | struct go7007 *go = snd_pcm_substream_chip(substream); | ||
196 | struct go7007_snd *gosnd = go->snd_context; | ||
197 | |||
198 | return gosnd->hw_ptr; | ||
199 | } | ||
200 | |||
201 | static struct page *go7007_snd_pcm_page(struct snd_pcm_substream *substream, | ||
202 | unsigned long offset) | ||
203 | { | ||
204 | return vmalloc_to_page(substream->runtime->dma_area + offset); | ||
205 | } | ||
206 | |||
207 | static struct snd_pcm_ops go7007_snd_capture_ops = { | ||
208 | .open = go7007_snd_capture_open, | ||
209 | .close = go7007_snd_capture_close, | ||
210 | .ioctl = snd_pcm_lib_ioctl, | ||
211 | .hw_params = go7007_snd_hw_params, | ||
212 | .hw_free = go7007_snd_hw_free, | ||
213 | .prepare = go7007_snd_pcm_prepare, | ||
214 | .trigger = go7007_snd_pcm_trigger, | ||
215 | .pointer = go7007_snd_pcm_pointer, | ||
216 | .page = go7007_snd_pcm_page, | ||
217 | }; | ||
218 | |||
219 | static int go7007_snd_free(struct snd_device *device) | ||
220 | { | ||
221 | struct go7007 *go = device->device_data; | ||
222 | |||
223 | kfree(go->snd_context); | ||
224 | go->snd_context = NULL; | ||
225 | if (--go->ref_count == 0) | ||
226 | kfree(go); | ||
227 | return 0; | ||
228 | } | ||
229 | |||
230 | static struct snd_device_ops go7007_snd_device_ops = { | ||
231 | .dev_free = go7007_snd_free, | ||
232 | }; | ||
233 | |||
234 | int go7007_snd_init(struct go7007 *go) | ||
235 | { | ||
236 | static int dev; | ||
237 | struct go7007_snd *gosnd; | ||
238 | int ret = 0; | ||
239 | |||
240 | if (dev >= SNDRV_CARDS) | ||
241 | return -ENODEV; | ||
242 | if (!enable[dev]) { | ||
243 | dev++; | ||
244 | return -ENOENT; | ||
245 | } | ||
246 | gosnd = kmalloc(sizeof(struct go7007_snd), GFP_KERNEL); | ||
247 | if (gosnd == NULL) | ||
248 | return -ENOMEM; | ||
249 | spin_lock_init(&gosnd->lock); | ||
250 | gosnd->hw_ptr = gosnd->w_idx = gosnd->avail = 0; | ||
251 | gosnd->capturing = 0; | ||
252 | ret = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, | ||
253 | &gosnd->card); | ||
254 | if (ret < 0) { | ||
255 | kfree(gosnd); | ||
256 | return ret; | ||
257 | } | ||
258 | ret = snd_device_new(gosnd->card, SNDRV_DEV_LOWLEVEL, go, | ||
259 | &go7007_snd_device_ops); | ||
260 | if (ret < 0) { | ||
261 | kfree(gosnd); | ||
262 | return ret; | ||
263 | } | ||
264 | snd_card_set_dev(gosnd->card, go->dev); | ||
265 | ret = snd_pcm_new(gosnd->card, "go7007", 0, 0, 1, &gosnd->pcm); | ||
266 | if (ret < 0) { | ||
267 | snd_card_free(gosnd->card); | ||
268 | kfree(gosnd); | ||
269 | return ret; | ||
270 | } | ||
271 | strncpy(gosnd->card->driver, "go7007", sizeof(gosnd->card->driver)); | ||
272 | strncpy(gosnd->card->shortname, go->name, sizeof(gosnd->card->driver)); | ||
273 | strncpy(gosnd->card->longname, gosnd->card->shortname, | ||
274 | sizeof(gosnd->card->longname)); | ||
275 | |||
276 | gosnd->pcm->private_data = go; | ||
277 | snd_pcm_set_ops(gosnd->pcm, SNDRV_PCM_STREAM_CAPTURE, | ||
278 | &go7007_snd_capture_ops); | ||
279 | |||
280 | ret = snd_card_register(gosnd->card); | ||
281 | if (ret < 0) { | ||
282 | snd_card_free(gosnd->card); | ||
283 | kfree(gosnd); | ||
284 | return ret; | ||
285 | } | ||
286 | |||
287 | gosnd->substream = NULL; | ||
288 | go->snd_context = gosnd; | ||
289 | ++dev; | ||
290 | ++go->ref_count; | ||
291 | |||
292 | return 0; | ||
293 | } | ||
294 | EXPORT_SYMBOL(go7007_snd_init); | ||
295 | |||
296 | int go7007_snd_remove(struct go7007 *go) | ||
297 | { | ||
298 | struct go7007_snd *gosnd = go->snd_context; | ||
299 | |||
300 | snd_card_disconnect(gosnd->card); | ||
301 | snd_card_free_when_closed(gosnd->card); | ||
302 | return 0; | ||
303 | } | ||
304 | EXPORT_SYMBOL(go7007_snd_remove); | ||
305 | |||
306 | MODULE_LICENSE("GPL v2"); | ||