1
2
3#include <linux/slab.h>
4#include <linux/module.h>
5#include <linux/dma-mapping.h>
6#include <linux/dmaengine.h>
7#include <linux/dma/pxa-dma.h>
8
9#include <sound/core.h>
10#include <sound/pcm.h>
11#include <sound/pcm_params.h>
12#include <sound/pxa2xx-lib.h>
13#include <sound/dmaengine_pcm.h>
14
15static const struct snd_pcm_hardware pxa2xx_pcm_hardware = {
16 .info = SNDRV_PCM_INFO_MMAP |
17 SNDRV_PCM_INFO_MMAP_VALID |
18 SNDRV_PCM_INFO_INTERLEAVED |
19 SNDRV_PCM_INFO_PAUSE |
20 SNDRV_PCM_INFO_RESUME,
21 .formats = SNDRV_PCM_FMTBIT_S16_LE |
22 SNDRV_PCM_FMTBIT_S24_LE |
23 SNDRV_PCM_FMTBIT_S32_LE,
24 .period_bytes_min = 32,
25 .period_bytes_max = 8192 - 32,
26 .periods_min = 1,
27 .periods_max = 256,
28 .buffer_bytes_max = 128 * 1024,
29 .fifo_size = 32,
30};
31
32int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
33 struct snd_pcm_hw_params *params)
34{
35 struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
36 struct snd_soc_pcm_runtime *rtd = substream->private_data;
37 struct snd_dmaengine_dai_dma_data *dma_params;
38 struct dma_slave_config config;
39 int ret;
40
41 dma_params = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
42 if (!dma_params)
43 return 0;
44
45 ret = snd_hwparams_to_dma_slave_config(substream, params, &config);
46 if (ret)
47 return ret;
48
49 snd_dmaengine_pcm_set_config_from_dai_data(substream,
50 snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream),
51 &config);
52
53 ret = dmaengine_slave_config(chan, &config);
54 if (ret)
55 return ret;
56
57 snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
58
59 return 0;
60}
61EXPORT_SYMBOL(pxa2xx_pcm_hw_params);
62
63int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
64{
65 snd_pcm_set_runtime_buffer(substream, NULL);
66 return 0;
67}
68EXPORT_SYMBOL(pxa2xx_pcm_hw_free);
69
70int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
71{
72 return snd_dmaengine_pcm_trigger(substream, cmd);
73}
74EXPORT_SYMBOL(pxa2xx_pcm_trigger);
75
76snd_pcm_uframes_t
77pxa2xx_pcm_pointer(struct snd_pcm_substream *substream)
78{
79 return snd_dmaengine_pcm_pointer(substream);
80}
81EXPORT_SYMBOL(pxa2xx_pcm_pointer);
82
83int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
84{
85 return 0;
86}
87EXPORT_SYMBOL(pxa2xx_pcm_prepare);
88
89int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
90{
91 struct snd_soc_pcm_runtime *rtd = substream->private_data;
92 struct snd_pcm_runtime *runtime = substream->runtime;
93 struct snd_dmaengine_dai_dma_data *dma_params;
94 int ret;
95
96 runtime->hw = pxa2xx_pcm_hardware;
97
98 dma_params = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
99 if (!dma_params)
100 return 0;
101
102
103
104
105
106
107 ret = snd_pcm_hw_constraint_step(runtime, 0,
108 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
109 if (ret)
110 return ret;
111
112 ret = snd_pcm_hw_constraint_step(runtime, 0,
113 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
114 if (ret)
115 return ret;
116
117 ret = snd_pcm_hw_constraint_integer(runtime,
118 SNDRV_PCM_HW_PARAM_PERIODS);
119 if (ret < 0)
120 return ret;
121
122 return snd_dmaengine_pcm_open(
123 substream, dma_request_slave_channel(asoc_rtd_to_cpu(rtd, 0)->dev,
124 dma_params->chan_name));
125}
126EXPORT_SYMBOL(pxa2xx_pcm_open);
127
128int pxa2xx_pcm_close(struct snd_pcm_substream *substream)
129{
130 return snd_dmaengine_pcm_close_release_chan(substream);
131}
132EXPORT_SYMBOL(pxa2xx_pcm_close);
133
134int pxa2xx_pcm_mmap(struct snd_pcm_substream *substream,
135 struct vm_area_struct *vma)
136{
137 struct snd_pcm_runtime *runtime = substream->runtime;
138 return dma_mmap_wc(substream->pcm->card->dev, vma, runtime->dma_area,
139 runtime->dma_addr, runtime->dma_bytes);
140}
141EXPORT_SYMBOL(pxa2xx_pcm_mmap);
142
143int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
144{
145 struct snd_pcm_substream *substream = pcm->streams[stream].substream;
146 struct snd_dma_buffer *buf = &substream->dma_buffer;
147 size_t size = pxa2xx_pcm_hardware.buffer_bytes_max;
148 buf->dev.type = SNDRV_DMA_TYPE_DEV;
149 buf->dev.dev = pcm->card->dev;
150 buf->private_data = NULL;
151 buf->area = dma_alloc_wc(pcm->card->dev, size, &buf->addr, GFP_KERNEL);
152 if (!buf->area)
153 return -ENOMEM;
154 buf->bytes = size;
155 return 0;
156}
157EXPORT_SYMBOL(pxa2xx_pcm_preallocate_dma_buffer);
158
159void pxa2xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
160{
161 struct snd_pcm_substream *substream;
162 struct snd_dma_buffer *buf;
163 int stream;
164
165 for (stream = 0; stream < 2; stream++) {
166 substream = pcm->streams[stream].substream;
167 if (!substream)
168 continue;
169 buf = &substream->dma_buffer;
170 if (!buf->area)
171 continue;
172 dma_free_wc(pcm->card->dev, buf->bytes, buf->area, buf->addr);
173 buf->area = NULL;
174 }
175}
176EXPORT_SYMBOL(pxa2xx_pcm_free_dma_buffers);
177
178void pxa2xx_soc_pcm_free(struct snd_soc_component *component,
179 struct snd_pcm *pcm)
180{
181 pxa2xx_pcm_free_dma_buffers(pcm);
182}
183EXPORT_SYMBOL(pxa2xx_soc_pcm_free);
184
185int pxa2xx_soc_pcm_new(struct snd_soc_component *component,
186 struct snd_soc_pcm_runtime *rtd)
187{
188 struct snd_card *card = rtd->card->snd_card;
189 struct snd_pcm *pcm = rtd->pcm;
190 int ret;
191
192 ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
193 if (ret)
194 return ret;
195
196 if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
197 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
198 SNDRV_PCM_STREAM_PLAYBACK);
199 if (ret)
200 goto out;
201 }
202
203 if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
204 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
205 SNDRV_PCM_STREAM_CAPTURE);
206 if (ret)
207 goto out;
208 }
209 out:
210 return ret;
211}
212EXPORT_SYMBOL(pxa2xx_soc_pcm_new);
213
214int pxa2xx_soc_pcm_open(struct snd_soc_component *component,
215 struct snd_pcm_substream *substream)
216{
217 return pxa2xx_pcm_open(substream);
218}
219EXPORT_SYMBOL(pxa2xx_soc_pcm_open);
220
221int pxa2xx_soc_pcm_close(struct snd_soc_component *component,
222 struct snd_pcm_substream *substream)
223{
224 return pxa2xx_pcm_close(substream);
225}
226EXPORT_SYMBOL(pxa2xx_soc_pcm_close);
227
228int pxa2xx_soc_pcm_hw_params(struct snd_soc_component *component,
229 struct snd_pcm_substream *substream,
230 struct snd_pcm_hw_params *params)
231{
232 return pxa2xx_pcm_hw_params(substream, params);
233}
234EXPORT_SYMBOL(pxa2xx_soc_pcm_hw_params);
235
236int pxa2xx_soc_pcm_hw_free(struct snd_soc_component *component,
237 struct snd_pcm_substream *substream)
238{
239 return pxa2xx_pcm_hw_free(substream);
240}
241EXPORT_SYMBOL(pxa2xx_soc_pcm_hw_free);
242
243int pxa2xx_soc_pcm_prepare(struct snd_soc_component *component,
244 struct snd_pcm_substream *substream)
245{
246 return pxa2xx_pcm_prepare(substream);
247}
248EXPORT_SYMBOL(pxa2xx_soc_pcm_prepare);
249
250int pxa2xx_soc_pcm_trigger(struct snd_soc_component *component,
251 struct snd_pcm_substream *substream, int cmd)
252{
253 return pxa2xx_pcm_trigger(substream, cmd);
254}
255EXPORT_SYMBOL(pxa2xx_soc_pcm_trigger);
256
257snd_pcm_uframes_t
258pxa2xx_soc_pcm_pointer(struct snd_soc_component *component,
259 struct snd_pcm_substream *substream)
260{
261 return pxa2xx_pcm_pointer(substream);
262}
263EXPORT_SYMBOL(pxa2xx_soc_pcm_pointer);
264
265int pxa2xx_soc_pcm_mmap(struct snd_soc_component *component,
266 struct snd_pcm_substream *substream,
267 struct vm_area_struct *vma)
268{
269 return pxa2xx_pcm_mmap(substream, vma);
270}
271EXPORT_SYMBOL(pxa2xx_soc_pcm_mmap);
272
273MODULE_AUTHOR("Nicolas Pitre");
274MODULE_DESCRIPTION("Intel PXA2xx sound library");
275MODULE_LICENSE("GPL");
276
