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Diffstat (limited to 'sound/soc/pxa/pxa2xx-pcm.c')
-rw-r--r--sound/soc/pxa/pxa2xx-pcm.c261
1 files changed, 7 insertions, 254 deletions
diff --git a/sound/soc/pxa/pxa2xx-pcm.c b/sound/soc/pxa/pxa2xx-pcm.c
index 771c592b0429..afcd892cd2fa 100644
--- a/sound/soc/pxa/pxa2xx-pcm.c
+++ b/sound/soc/pxa/pxa2xx-pcm.c
@@ -10,64 +10,14 @@
10 * published by the Free Software Foundation. 10 * published by the Free Software Foundation.
11 */ 11 */
12 12
13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/platform_device.h>
16#include <linux/slab.h>
17#include <linux/dma-mapping.h> 13#include <linux/dma-mapping.h>
18 14
19#include <sound/core.h> 15#include <sound/core.h>
20#include <sound/pcm.h>
21#include <sound/pcm_params.h>
22#include <sound/soc.h> 16#include <sound/soc.h>
23 17#include <sound/pxa2xx-lib.h>
24#include <asm/dma.h>
25#include <mach/hardware.h>
26#include <mach/pxa-regs.h>
27#include <mach/audio.h>
28 18
29#include "pxa2xx-pcm.h" 19#include "pxa2xx-pcm.h"
30 20#include "../../arm/pxa2xx-pcm.h"
31static const struct snd_pcm_hardware pxa2xx_pcm_hardware = {
32 .info = SNDRV_PCM_INFO_MMAP |
33 SNDRV_PCM_INFO_MMAP_VALID |
34 SNDRV_PCM_INFO_INTERLEAVED |
35 SNDRV_PCM_INFO_PAUSE |
36 SNDRV_PCM_INFO_RESUME,
37 .formats = SNDRV_PCM_FMTBIT_S16_LE |
38 SNDRV_PCM_FMTBIT_S24_LE |
39 SNDRV_PCM_FMTBIT_S32_LE,
40 .period_bytes_min = 32,
41 .period_bytes_max = 8192 - 32,
42 .periods_min = 1,
43 .periods_max = PAGE_SIZE/sizeof(pxa_dma_desc),
44 .buffer_bytes_max = 128 * 1024,
45 .fifo_size = 32,
46};
47
48struct pxa2xx_runtime_data {
49 int dma_ch;
50 struct pxa2xx_pcm_dma_params *params;
51 pxa_dma_desc *dma_desc_array;
52 dma_addr_t dma_desc_array_phys;
53};
54
55static void pxa2xx_pcm_dma_irq(int dma_ch, void *dev_id)
56{
57 struct snd_pcm_substream *substream = dev_id;
58 struct pxa2xx_runtime_data *prtd = substream->runtime->private_data;
59 int dcsr;
60
61 dcsr = DCSR(dma_ch);
62 DCSR(dma_ch) = dcsr & ~DCSR_STOPIRQEN;
63
64 if (dcsr & DCSR_ENDINTR) {
65 snd_pcm_period_elapsed(substream);
66 } else {
67 printk(KERN_ERR "%s: DMA error on channel %d (DCSR=%#x)\n",
68 prtd->params->name, dma_ch, dcsr);
69 }
70}
71 21
72static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream, 22static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
73 struct snd_pcm_hw_params *params) 23 struct snd_pcm_hw_params *params)
@@ -76,10 +26,6 @@ static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
76 struct pxa2xx_runtime_data *prtd = runtime->private_data; 26 struct pxa2xx_runtime_data *prtd = runtime->private_data;
77 struct snd_soc_pcm_runtime *rtd = substream->private_data; 27 struct snd_soc_pcm_runtime *rtd = substream->private_data;
78 struct pxa2xx_pcm_dma_params *dma = rtd->dai->cpu_dai->dma_data; 28 struct pxa2xx_pcm_dma_params *dma = rtd->dai->cpu_dai->dma_data;
79 size_t totsize = params_buffer_bytes(params);
80 size_t period = params_period_bytes(params);
81 pxa_dma_desc *dma_desc;
82 dma_addr_t dma_buff_phys, next_desc_phys;
83 int ret; 29 int ret;
84 30
85 /* return if this is a bufferless transfer e.g. 31 /* return if this is a bufferless transfer e.g.
@@ -106,42 +52,16 @@ static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
106 prtd->dma_ch = ret; 52 prtd->dma_ch = ret;
107 } 53 }
108 54
109 snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); 55 return __pxa2xx_pcm_hw_params(substream, params);
110 runtime->dma_bytes = totsize;
111
112 dma_desc = prtd->dma_desc_array;
113 next_desc_phys = prtd->dma_desc_array_phys;
114 dma_buff_phys = runtime->dma_addr;
115 do {
116 next_desc_phys += sizeof(pxa_dma_desc);
117 dma_desc->ddadr = next_desc_phys;
118 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
119 dma_desc->dsadr = dma_buff_phys;
120 dma_desc->dtadr = prtd->params->dev_addr;
121 } else {
122 dma_desc->dsadr = prtd->params->dev_addr;
123 dma_desc->dtadr = dma_buff_phys;
124 }
125 if (period > totsize)
126 period = totsize;
127 dma_desc->dcmd = prtd->params->dcmd | period | DCMD_ENDIRQEN;
128 dma_desc++;
129 dma_buff_phys += period;
130 } while (totsize -= period);
131 dma_desc[-1].ddadr = prtd->dma_desc_array_phys;
132
133 return 0;
134} 56}
135 57
136static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream) 58static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
137{ 59{
138 struct pxa2xx_runtime_data *prtd = substream->runtime->private_data; 60 struct pxa2xx_runtime_data *prtd = substream->runtime->private_data;
139 61
140 if (prtd && prtd->params) 62 __pxa2xx_pcm_hw_free(substream);
141 *prtd->params->drcmr = 0;
142 63
143 if (prtd->dma_ch) { 64 if (prtd->dma_ch) {
144 snd_pcm_set_runtime_buffer(substream, NULL);
145 pxa_free_dma(prtd->dma_ch); 65 pxa_free_dma(prtd->dma_ch);
146 prtd->dma_ch = 0; 66 prtd->dma_ch = 0;
147 } 67 }
@@ -149,185 +69,18 @@ static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
149 return 0; 69 return 0;
150} 70}
151 71
152static int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
153{
154 struct pxa2xx_runtime_data *prtd = substream->runtime->private_data;
155
156 DCSR(prtd->dma_ch) &= ~DCSR_RUN;
157 DCSR(prtd->dma_ch) = 0;
158 DCMD(prtd->dma_ch) = 0;
159 *prtd->params->drcmr = prtd->dma_ch | DRCMR_MAPVLD;
160
161 return 0;
162}
163
164static int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
165{
166 struct pxa2xx_runtime_data *prtd = substream->runtime->private_data;
167 int ret = 0;
168
169 switch (cmd) {
170 case SNDRV_PCM_TRIGGER_START:
171 DDADR(prtd->dma_ch) = prtd->dma_desc_array_phys;
172 DCSR(prtd->dma_ch) = DCSR_RUN;
173 break;
174
175 case SNDRV_PCM_TRIGGER_STOP:
176 case SNDRV_PCM_TRIGGER_SUSPEND:
177 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
178 DCSR(prtd->dma_ch) &= ~DCSR_RUN;
179 break;
180
181 case SNDRV_PCM_TRIGGER_RESUME:
182 DCSR(prtd->dma_ch) |= DCSR_RUN;
183 break;
184 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
185 DDADR(prtd->dma_ch) = prtd->dma_desc_array_phys;
186 DCSR(prtd->dma_ch) |= DCSR_RUN;
187 break;
188
189 default:
190 ret = -EINVAL;
191 }
192
193 return ret;
194}
195
196static snd_pcm_uframes_t
197pxa2xx_pcm_pointer(struct snd_pcm_substream *substream)
198{
199 struct snd_pcm_runtime *runtime = substream->runtime;
200 struct pxa2xx_runtime_data *prtd = runtime->private_data;
201
202 dma_addr_t ptr = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
203 DSADR(prtd->dma_ch) : DTADR(prtd->dma_ch);
204 snd_pcm_uframes_t x = bytes_to_frames(runtime, ptr - runtime->dma_addr);
205
206 if (x == runtime->buffer_size)
207 x = 0;
208 return x;
209}
210
211static int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
212{
213 struct snd_pcm_runtime *runtime = substream->runtime;
214 struct pxa2xx_runtime_data *prtd;
215 int ret;
216
217 snd_soc_set_runtime_hwparams(substream, &pxa2xx_pcm_hardware);
218
219 /*
220 * For mysterious reasons (and despite what the manual says)
221 * playback samples are lost if the DMA count is not a multiple
222 * of the DMA burst size. Let's add a rule to enforce that.
223 */
224 ret = snd_pcm_hw_constraint_step(runtime, 0,
225 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
226 if (ret)
227 goto out;
228
229 ret = snd_pcm_hw_constraint_step(runtime, 0,
230 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
231 if (ret)
232 goto out;
233
234 ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
235 if (ret < 0)
236 goto out;
237
238 prtd = kzalloc(sizeof(struct pxa2xx_runtime_data), GFP_KERNEL);
239 if (prtd == NULL) {
240 ret = -ENOMEM;
241 goto out;
242 }
243
244 prtd->dma_desc_array =
245 dma_alloc_writecombine(substream->pcm->card->dev, PAGE_SIZE,
246 &prtd->dma_desc_array_phys, GFP_KERNEL);
247 if (!prtd->dma_desc_array) {
248 ret = -ENOMEM;
249 goto err1;
250 }
251
252 runtime->private_data = prtd;
253 return 0;
254
255 err1:
256 kfree(prtd);
257 out:
258 return ret;
259}
260
261static int pxa2xx_pcm_close(struct snd_pcm_substream *substream)
262{
263 struct snd_pcm_runtime *runtime = substream->runtime;
264 struct pxa2xx_runtime_data *prtd = runtime->private_data;
265
266 dma_free_writecombine(substream->pcm->card->dev, PAGE_SIZE,
267 prtd->dma_desc_array, prtd->dma_desc_array_phys);
268 kfree(prtd);
269 return 0;
270}
271
272static int pxa2xx_pcm_mmap(struct snd_pcm_substream *substream,
273 struct vm_area_struct *vma)
274{
275 struct snd_pcm_runtime *runtime = substream->runtime;
276 return dma_mmap_writecombine(substream->pcm->card->dev, vma,
277 runtime->dma_area,
278 runtime->dma_addr,
279 runtime->dma_bytes);
280}
281
282struct snd_pcm_ops pxa2xx_pcm_ops = { 72struct snd_pcm_ops pxa2xx_pcm_ops = {
283 .open = pxa2xx_pcm_open, 73 .open = __pxa2xx_pcm_open,
284 .close = pxa2xx_pcm_close, 74 .close = __pxa2xx_pcm_close,
285 .ioctl = snd_pcm_lib_ioctl, 75 .ioctl = snd_pcm_lib_ioctl,
286 .hw_params = pxa2xx_pcm_hw_params, 76 .hw_params = pxa2xx_pcm_hw_params,
287 .hw_free = pxa2xx_pcm_hw_free, 77 .hw_free = pxa2xx_pcm_hw_free,
288 .prepare = pxa2xx_pcm_prepare, 78 .prepare = __pxa2xx_pcm_prepare,
289 .trigger = pxa2xx_pcm_trigger, 79 .trigger = pxa2xx_pcm_trigger,
290 .pointer = pxa2xx_pcm_pointer, 80 .pointer = pxa2xx_pcm_pointer,
291 .mmap = pxa2xx_pcm_mmap, 81 .mmap = pxa2xx_pcm_mmap,
292}; 82};
293 83
294static int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
295{
296 struct snd_pcm_substream *substream = pcm->streams[stream].substream;
297 struct snd_dma_buffer *buf = &substream->dma_buffer;
298 size_t size = pxa2xx_pcm_hardware.buffer_bytes_max;
299 buf->dev.type = SNDRV_DMA_TYPE_DEV;
300 buf->dev.dev = pcm->card->dev;
301 buf->private_data = NULL;
302 buf->area = dma_alloc_writecombine(pcm->card->dev, size,
303 &buf->addr, GFP_KERNEL);
304 if (!buf->area)
305 return -ENOMEM;
306 buf->bytes = size;
307 return 0;
308}
309
310static void pxa2xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
311{
312 struct snd_pcm_substream *substream;
313 struct snd_dma_buffer *buf;
314 int stream;
315
316 for (stream = 0; stream < 2; stream++) {
317 substream = pcm->streams[stream].substream;
318 if (!substream)
319 continue;
320
321 buf = &substream->dma_buffer;
322 if (!buf->area)
323 continue;
324
325 dma_free_writecombine(pcm->card->dev, buf->bytes,
326 buf->area, buf->addr);
327 buf->area = NULL;
328 }
329}
330
331static u64 pxa2xx_pcm_dmamask = DMA_32BIT_MASK; 84static u64 pxa2xx_pcm_dmamask = DMA_32BIT_MASK;
332 85
333static int pxa2xx_soc_pcm_new(struct snd_card *card, struct snd_soc_dai *dai, 86static int pxa2xx_soc_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-17 05:08:56 -0500