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Diffstat (limited to 'sound/arm/pxa2xx-pcm.c')
-rw-r--r--sound/arm/pxa2xx-pcm.c252
1 files changed, 8 insertions, 244 deletions
diff --git a/sound/arm/pxa2xx-pcm.c b/sound/arm/pxa2xx-pcm.c
index 381094aab235..535704f77496 100644
--- a/sound/arm/pxa2xx-pcm.c
+++ b/sound/arm/pxa2xx-pcm.c
@@ -10,183 +10,20 @@
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/device.h>
16#include <linux/slab.h>
17#include <linux/dma-mapping.h>
18
19#include <sound/core.h> 13#include <sound/core.h>
20#include <sound/pcm.h> 14#include <sound/pxa2xx-lib.h>
21#include <sound/pcm_params.h>
22
23#include <asm/dma.h>
24#include <mach/hardware.h>
25#include <mach/pxa-regs.h>
26 15
27#include "pxa2xx-pcm.h" 16#include "pxa2xx-pcm.h"
28 17
29
30static const struct snd_pcm_hardware pxa2xx_pcm_hardware = {
31 .info = SNDRV_PCM_INFO_MMAP |
32 SNDRV_PCM_INFO_MMAP_VALID |
33 SNDRV_PCM_INFO_INTERLEAVED |
34 SNDRV_PCM_INFO_PAUSE,
35 .formats = SNDRV_PCM_FMTBIT_S16_LE,
36 .period_bytes_min = 32,
37 .period_bytes_max = 8192 - 32,
38 .periods_min = 1,
39 .periods_max = PAGE_SIZE/sizeof(pxa_dma_desc),
40 .buffer_bytes_max = 128 * 1024,
41 .fifo_size = 32,
42};
43
44struct pxa2xx_runtime_data {
45 int dma_ch;
46 struct pxa2xx_pcm_dma_params *params;
47 pxa_dma_desc *dma_desc_array;
48 dma_addr_t dma_desc_array_phys;
49};
50
51static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
52 struct snd_pcm_hw_params *params)
53{
54 struct snd_pcm_runtime *runtime = substream->runtime;
55 struct pxa2xx_runtime_data *rtd = runtime->private_data;
56 size_t totsize = params_buffer_bytes(params);
57 size_t period = params_period_bytes(params);
58 pxa_dma_desc *dma_desc;
59 dma_addr_t dma_buff_phys, next_desc_phys;
60
61 snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
62 runtime->dma_bytes = totsize;
63
64 dma_desc = rtd->dma_desc_array;
65 next_desc_phys = rtd->dma_desc_array_phys;
66 dma_buff_phys = runtime->dma_addr;
67 do {
68 next_desc_phys += sizeof(pxa_dma_desc);
69 dma_desc->ddadr = next_desc_phys;
70 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
71 dma_desc->dsadr = dma_buff_phys;
72 dma_desc->dtadr = rtd->params->dev_addr;
73 } else {
74 dma_desc->dsadr = rtd->params->dev_addr;
75 dma_desc->dtadr = dma_buff_phys;
76 }
77 if (period > totsize)
78 period = totsize;
79 dma_desc->dcmd = rtd->params->dcmd | period | DCMD_ENDIRQEN;
80 dma_desc++;
81 dma_buff_phys += period;
82 } while (totsize -= period);
83 dma_desc[-1].ddadr = rtd->dma_desc_array_phys;
84
85 return 0;
86}
87
88static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
89{
90 struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
91
92 *rtd->params->drcmr = 0;
93 snd_pcm_set_runtime_buffer(substream, NULL);
94 return 0;
95}
96
97static int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream) 18static int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
98{ 19{
99 struct pxa2xx_pcm_client *client = substream->private_data; 20 struct pxa2xx_pcm_client *client = substream->private_data;
100 struct snd_pcm_runtime *runtime = substream->runtime;
101 struct pxa2xx_runtime_data *rtd = runtime->private_data;
102 21
103 DCSR(rtd->dma_ch) &= ~DCSR_RUN; 22 __pxa2xx_pcm_prepare(substream);
104 DCSR(rtd->dma_ch) = 0;
105 DCMD(rtd->dma_ch) = 0;
106 *rtd->params->drcmr = rtd->dma_ch | DRCMR_MAPVLD;
107 23
108 return client->prepare(substream); 24 return client->prepare(substream);
109} 25}
110 26
111static int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
112{
113 struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
114 int ret = 0;
115
116 switch (cmd) {
117 case SNDRV_PCM_TRIGGER_START:
118 DDADR(rtd->dma_ch) = rtd->dma_desc_array_phys;
119 DCSR(rtd->dma_ch) = DCSR_RUN;
120 break;
121
122 case SNDRV_PCM_TRIGGER_STOP:
123 case SNDRV_PCM_TRIGGER_SUSPEND:
124 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
125 DCSR(rtd->dma_ch) &= ~DCSR_RUN;
126 break;
127
128 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
129 DCSR(rtd->dma_ch) |= DCSR_RUN;
130 break;
131
132 default:
133 ret = -EINVAL;
134 }
135
136 return ret;
137}
138
139static void pxa2xx_pcm_dma_irq(int dma_ch, void *dev_id)
140{
141 struct snd_pcm_substream *substream = dev_id;
142 struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
143 int dcsr;
144
145 dcsr = DCSR(dma_ch);
146 DCSR(dma_ch) = dcsr & ~DCSR_STOPIRQEN;
147
148 if (dcsr & DCSR_ENDINTR) {
149 snd_pcm_period_elapsed(substream);
150 } else {
151 printk( KERN_ERR "%s: DMA error on channel %d (DCSR=%#x)\n",
152 rtd->params->name, dma_ch, dcsr );
153 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
154 }
155}
156
157static snd_pcm_uframes_t pxa2xx_pcm_pointer(struct snd_pcm_substream *substream)
158{
159 struct snd_pcm_runtime *runtime = substream->runtime;
160 struct pxa2xx_runtime_data *rtd = runtime->private_data;
161 dma_addr_t ptr = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
162 DSADR(rtd->dma_ch) : DTADR(rtd->dma_ch);
163 snd_pcm_uframes_t x = bytes_to_frames(runtime, ptr - runtime->dma_addr);
164 if (x == runtime->buffer_size)
165 x = 0;
166 return x;
167}
168
169static int
170pxa2xx_pcm_hw_rule_mult32(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)
171{
172 struct snd_interval *i = hw_param_interval(params, rule->var);
173 int changed = 0;
174
175 if (i->min & 31) {
176 i->min = (i->min & ~31) + 32;
177 i->openmin = 0;
178 changed = 1;
179 }
180
181 if (i->max & 31) {
182 i->max &= ~31;
183 i->openmax = 0;
184 changed = 1;
185 }
186
187 return changed;
188}
189
190static int pxa2xx_pcm_open(struct snd_pcm_substream *substream) 27static int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
191{ 28{
192 struct pxa2xx_pcm_client *client = substream->private_data; 29 struct pxa2xx_pcm_client *client = substream->private_data;
@@ -194,33 +31,11 @@ static int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
194 struct pxa2xx_runtime_data *rtd; 31 struct pxa2xx_runtime_data *rtd;
195 int ret; 32 int ret;
196 33
197 runtime->hw = pxa2xx_pcm_hardware; 34 ret = __pxa2xx_pcm_open(substream);
198
199 /*
200 * For mysterious reasons (and despite what the manual says)
201 * playback samples are lost if the DMA count is not a multiple
202 * of the DMA burst size. Let's add a rule to enforce that.
203 */
204 ret = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
205 pxa2xx_pcm_hw_rule_mult32, NULL,
206 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, -1);
207 if (ret)
208 goto out;
209 ret = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
210 pxa2xx_pcm_hw_rule_mult32, NULL,
211 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
212 if (ret) 35 if (ret)
213 goto out; 36 goto out;
214 37
215 ret = -ENOMEM; 38 rtd = runtime->private_data;
216 rtd = kmalloc(sizeof(*rtd), GFP_KERNEL);
217 if (!rtd)
218 goto out;
219 rtd->dma_desc_array =
220 dma_alloc_writecombine(substream->pcm->card->dev, PAGE_SIZE,
221 &rtd->dma_desc_array_phys, GFP_KERNEL);
222 if (!rtd->dma_desc_array)
223 goto err1;
224 39
225 rtd->params = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 40 rtd->params = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
226 client->playback_params : client->capture_params; 41 client->playback_params : client->capture_params;
@@ -230,17 +45,13 @@ static int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
230 goto err2; 45 goto err2;
231 rtd->dma_ch = ret; 46 rtd->dma_ch = ret;
232 47
233 runtime->private_data = rtd;
234 ret = client->startup(substream); 48 ret = client->startup(substream);
235 if (!ret) 49 if (!ret)
236 goto out; 50 goto out;
237 51
238 pxa_free_dma(rtd->dma_ch); 52 pxa_free_dma(rtd->dma_ch);
239 err2: 53 err2:
240 dma_free_writecombine(substream->pcm->card->dev, PAGE_SIZE, 54 __pxa2xx_pcm_close(substream);
241 rtd->dma_desc_array, rtd->dma_desc_array_phys);
242 err1:
243 kfree(rtd);
244 out: 55 out:
245 return ret; 56 return ret;
246} 57}
@@ -252,69 +63,22 @@ static int pxa2xx_pcm_close(struct snd_pcm_substream *substream)
252 63
253 pxa_free_dma(rtd->dma_ch); 64 pxa_free_dma(rtd->dma_ch);
254 client->shutdown(substream); 65 client->shutdown(substream);
255 dma_free_writecombine(substream->pcm->card->dev, PAGE_SIZE,
256 rtd->dma_desc_array, rtd->dma_desc_array_phys);
257 kfree(rtd);
258 return 0;
259}
260 66
261static int 67 return __pxa2xx_pcm_close(substream);
262pxa2xx_pcm_mmap(struct snd_pcm_substream *substream, struct vm_area_struct *vma)
263{
264 struct snd_pcm_runtime *runtime = substream->runtime;
265 return dma_mmap_writecombine(substream->pcm->card->dev, vma,
266 runtime->dma_area,
267 runtime->dma_addr,
268 runtime->dma_bytes);
269} 68}
270 69
271static struct snd_pcm_ops pxa2xx_pcm_ops = { 70static struct snd_pcm_ops pxa2xx_pcm_ops = {
272 .open = pxa2xx_pcm_open, 71 .open = pxa2xx_pcm_open,
273 .close = pxa2xx_pcm_close, 72 .close = pxa2xx_pcm_close,
274 .ioctl = snd_pcm_lib_ioctl, 73 .ioctl = snd_pcm_lib_ioctl,
275 .hw_params = pxa2xx_pcm_hw_params, 74 .hw_params = __pxa2xx_pcm_hw_params,
276 .hw_free = pxa2xx_pcm_hw_free, 75 .hw_free = __pxa2xx_pcm_hw_free,
277 .prepare = pxa2xx_pcm_prepare, 76 .prepare = pxa2xx_pcm_prepare,
278 .trigger = pxa2xx_pcm_trigger, 77 .trigger = pxa2xx_pcm_trigger,
279 .pointer = pxa2xx_pcm_pointer, 78 .pointer = pxa2xx_pcm_pointer,
280 .mmap = pxa2xx_pcm_mmap, 79 .mmap = pxa2xx_pcm_mmap,
281}; 80};
282 81
283static int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
284{
285 struct snd_pcm_substream *substream = pcm->streams[stream].substream;
286 struct snd_dma_buffer *buf = &substream->dma_buffer;
287 size_t size = pxa2xx_pcm_hardware.buffer_bytes_max;
288 buf->dev.type = SNDRV_DMA_TYPE_DEV;
289 buf->dev.dev = pcm->card->dev;
290 buf->private_data = NULL;
291 buf->area = dma_alloc_writecombine(pcm->card->dev, size,
292 &buf->addr, GFP_KERNEL);
293 if (!buf->area)
294 return -ENOMEM;
295 buf->bytes = size;
296 return 0;
297}
298
299static void pxa2xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
300{
301 struct snd_pcm_substream *substream;
302 struct snd_dma_buffer *buf;
303 int stream;
304
305 for (stream = 0; stream < 2; stream++) {
306 substream = pcm->streams[stream].substream;
307 if (!substream)
308 continue;
309 buf = &substream->dma_buffer;
310 if (!buf->area)
311 continue;
312 dma_free_writecombine(pcm->card->dev, buf->bytes,
313 buf->area, buf->addr);
314 buf->area = NULL;
315 }
316}
317
318static u64 pxa2xx_pcm_dmamask = 0xffffffff; 82static u64 pxa2xx_pcm_dmamask = 0xffffffff;
319 83
320int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client, 84int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client,
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-29 12:26:24 -0400