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authorDmitry Baryshkov <dbaryshkov@gmail.com>2008-09-09 21:01:20 -0400
committerJaroslav Kysela <perex@perex.cz>2008-09-23 02:18:10 -0400
commita6d77317678148c973bb0131cc5a3a772f756d23 (patch)
tree09cf4c825ce49eccef121d4ad133cfec20246248 /sound/arm
parent9d1cf39be6709761be3ce0a00e5c9ee5dc805ac5 (diff)
ALSA: Separate common pxa2xx-pcm code
ASoC and non-ASoC drivers for PCM DMA on PXA share lots of common code. Move it to pxa2xx-lib. [Fixed some checkpatch warnings -- broonie] Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Diffstat (limited to 'sound/arm')
-rw-r--r--sound/arm/Kconfig6
-rw-r--r--sound/arm/Makefile3
-rw-r--r--sound/arm/pxa2xx-pcm-lib.c278
-rw-r--r--sound/arm/pxa2xx-pcm.c252
-rw-r--r--sound/arm/pxa2xx-pcm.h13
5 files changed, 300 insertions, 252 deletions
diff --git a/sound/arm/Kconfig b/sound/arm/Kconfig
index 2e554815e27c..f8e6de48d816 100644
--- a/sound/arm/Kconfig
+++ b/sound/arm/Kconfig
@@ -34,7 +34,10 @@ config SND_PXA2XX_PCM
34 34
35config SND_PXA2XX_LIB 35config SND_PXA2XX_LIB
36 tristate 36 tristate
37 select SND_AC97_CODEC 37 select SND_AC97_CODEC if SND_PXA2XX_LIB_AC97
38
39config SND_PXA2XX_LIB_AC97
40 bool
38 41
39config SND_PXA2XX_AC97 42config SND_PXA2XX_AC97
40 tristate "AC97 driver for the Intel PXA2xx chip" 43 tristate "AC97 driver for the Intel PXA2xx chip"
@@ -42,6 +45,7 @@ config SND_PXA2XX_AC97
42 select SND_PXA2XX_PCM 45 select SND_PXA2XX_PCM
43 select SND_AC97_CODEC 46 select SND_AC97_CODEC
44 select SND_PXA2XX_LIB 47 select SND_PXA2XX_LIB
48 select SND_PXA2XX_LIB_AC97
45 help 49 help
46 Say Y or M if you want to support any AC97 codec attached to 50 Say Y or M if you want to support any AC97 codec attached to
47 the PXA2xx AC97 interface. 51 the PXA2xx AC97 interface.
diff --git a/sound/arm/Makefile b/sound/arm/Makefile
index bb2ed884acdd..2054de11de8a 100644
--- a/sound/arm/Makefile
+++ b/sound/arm/Makefile
@@ -12,7 +12,8 @@ obj-$(CONFIG_SND_PXA2XX_PCM) += snd-pxa2xx-pcm.o
12snd-pxa2xx-pcm-objs := pxa2xx-pcm.o 12snd-pxa2xx-pcm-objs := pxa2xx-pcm.o
13 13
14obj-$(CONFIG_SND_PXA2XX_LIB) += snd-pxa2xx-lib.o 14obj-$(CONFIG_SND_PXA2XX_LIB) += snd-pxa2xx-lib.o
15snd-pxa2xx-lib-objs := pxa2xx-ac97-lib.o 15snd-pxa2xx-lib-y := pxa2xx-pcm-lib.o
16snd-pxa2xx-lib-$(CONFIG_SND_PXA2XX_LIB_AC97) += pxa2xx-ac97-lib.o
16 17
17obj-$(CONFIG_SND_PXA2XX_AC97) += snd-pxa2xx-ac97.o 18obj-$(CONFIG_SND_PXA2XX_AC97) += snd-pxa2xx-ac97.o
18snd-pxa2xx-ac97-objs := pxa2xx-ac97.o 19snd-pxa2xx-ac97-objs := pxa2xx-ac97.o
diff --git a/sound/arm/pxa2xx-pcm-lib.c b/sound/arm/pxa2xx-pcm-lib.c
new file mode 100644
index 000000000000..1c93eb77cb99
--- /dev/null
+++ b/sound/arm/pxa2xx-pcm-lib.c
@@ -0,0 +1,278 @@
1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License version 2 as
4 * published by the Free Software Foundation.
5 */
6
7#include <linux/module.h>
8#include <linux/dma-mapping.h>
9
10#include <sound/core.h>
11#include <sound/pcm.h>
12#include <sound/pcm_params.h>
13#include <sound/pxa2xx-lib.h>
14
15#include <asm/dma.h>
16#include <mach/pxa-regs.h>
17
18#include "pxa2xx-pcm.h"
19
20static const struct snd_pcm_hardware pxa2xx_pcm_hardware = {
21 .info = SNDRV_PCM_INFO_MMAP |
22 SNDRV_PCM_INFO_MMAP_VALID |
23 SNDRV_PCM_INFO_INTERLEAVED |
24 SNDRV_PCM_INFO_PAUSE |
25 SNDRV_PCM_INFO_RESUME,
26 .formats = SNDRV_PCM_FMTBIT_S16_LE |
27 SNDRV_PCM_FMTBIT_S24_LE |
28 SNDRV_PCM_FMTBIT_S32_LE,
29 .period_bytes_min = 32,
30 .period_bytes_max = 8192 - 32,
31 .periods_min = 1,
32 .periods_max = PAGE_SIZE/sizeof(pxa_dma_desc),
33 .buffer_bytes_max = 128 * 1024,
34 .fifo_size = 32,
35};
36
37int __pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
38 struct snd_pcm_hw_params *params)
39{
40 struct snd_pcm_runtime *runtime = substream->runtime;
41 struct pxa2xx_runtime_data *rtd = runtime->private_data;
42 size_t totsize = params_buffer_bytes(params);
43 size_t period = params_period_bytes(params);
44 pxa_dma_desc *dma_desc;
45 dma_addr_t dma_buff_phys, next_desc_phys;
46
47 snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
48 runtime->dma_bytes = totsize;
49
50 dma_desc = rtd->dma_desc_array;
51 next_desc_phys = rtd->dma_desc_array_phys;
52 dma_buff_phys = runtime->dma_addr;
53 do {
54 next_desc_phys += sizeof(pxa_dma_desc);
55 dma_desc->ddadr = next_desc_phys;
56 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
57 dma_desc->dsadr = dma_buff_phys;
58 dma_desc->dtadr = rtd->params->dev_addr;
59 } else {
60 dma_desc->dsadr = rtd->params->dev_addr;
61 dma_desc->dtadr = dma_buff_phys;
62 }
63 if (period > totsize)
64 period = totsize;
65 dma_desc->dcmd = rtd->params->dcmd | period | DCMD_ENDIRQEN;
66 dma_desc++;
67 dma_buff_phys += period;
68 } while (totsize -= period);
69 dma_desc[-1].ddadr = rtd->dma_desc_array_phys;
70
71 return 0;
72}
73EXPORT_SYMBOL(__pxa2xx_pcm_hw_params);
74
75int __pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
76{
77 struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
78
79 if (rtd && rtd->params)
80 *rtd->params->drcmr = 0;
81
82 snd_pcm_set_runtime_buffer(substream, NULL);
83 return 0;
84}
85EXPORT_SYMBOL(__pxa2xx_pcm_hw_free);
86
87int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
88{
89 struct pxa2xx_runtime_data *prtd = substream->runtime->private_data;
90 int ret = 0;
91
92 switch (cmd) {
93 case SNDRV_PCM_TRIGGER_START:
94 DDADR(prtd->dma_ch) = prtd->dma_desc_array_phys;
95 DCSR(prtd->dma_ch) = DCSR_RUN;
96 break;
97
98 case SNDRV_PCM_TRIGGER_STOP:
99 case SNDRV_PCM_TRIGGER_SUSPEND:
100 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
101 DCSR(prtd->dma_ch) &= ~DCSR_RUN;
102 break;
103
104 case SNDRV_PCM_TRIGGER_RESUME:
105 DCSR(prtd->dma_ch) |= DCSR_RUN;
106 break;
107 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
108 DDADR(prtd->dma_ch) = prtd->dma_desc_array_phys;
109 DCSR(prtd->dma_ch) |= DCSR_RUN;
110 break;
111
112 default:
113 ret = -EINVAL;
114 }
115
116 return ret;
117}
118EXPORT_SYMBOL(pxa2xx_pcm_trigger);
119
120snd_pcm_uframes_t
121pxa2xx_pcm_pointer(struct snd_pcm_substream *substream)
122{
123 struct snd_pcm_runtime *runtime = substream->runtime;
124 struct pxa2xx_runtime_data *prtd = runtime->private_data;
125
126 dma_addr_t ptr = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
127 DSADR(prtd->dma_ch) : DTADR(prtd->dma_ch);
128 snd_pcm_uframes_t x = bytes_to_frames(runtime, ptr - runtime->dma_addr);
129
130 if (x == runtime->buffer_size)
131 x = 0;
132 return x;
133}
134EXPORT_SYMBOL(pxa2xx_pcm_pointer);
135
136int __pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
137{
138 struct pxa2xx_runtime_data *prtd = substream->runtime->private_data;
139
140 DCSR(prtd->dma_ch) &= ~DCSR_RUN;
141 DCSR(prtd->dma_ch) = 0;
142 DCMD(prtd->dma_ch) = 0;
143 *prtd->params->drcmr = prtd->dma_ch | DRCMR_MAPVLD;
144
145 return 0;
146}
147EXPORT_SYMBOL(__pxa2xx_pcm_prepare);
148
149void pxa2xx_pcm_dma_irq(int dma_ch, void *dev_id)
150{
151 struct snd_pcm_substream *substream = dev_id;
152 struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
153 int dcsr;
154
155 dcsr = DCSR(dma_ch);
156 DCSR(dma_ch) = dcsr & ~DCSR_STOPIRQEN;
157
158 if (dcsr & DCSR_ENDINTR) {
159 snd_pcm_period_elapsed(substream);
160 } else {
161 printk(KERN_ERR "%s: DMA error on channel %d (DCSR=%#x)\n",
162 rtd->params->name, dma_ch, dcsr);
163 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
164 }
165}
166EXPORT_SYMBOL(pxa2xx_pcm_dma_irq);
167
168int __pxa2xx_pcm_open(struct snd_pcm_substream *substream)
169{
170 struct snd_pcm_runtime *runtime = substream->runtime;
171 struct pxa2xx_runtime_data *rtd;
172 int ret;
173
174 runtime->hw = pxa2xx_pcm_hardware;
175
176 /*
177 * For mysterious reasons (and despite what the manual says)
178 * playback samples are lost if the DMA count is not a multiple
179 * of the DMA burst size. Let's add a rule to enforce that.
180 */
181 ret = snd_pcm_hw_constraint_step(runtime, 0,
182 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
183 if (ret)
184 goto out;
185
186 ret = snd_pcm_hw_constraint_step(runtime, 0,
187 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
188 if (ret)
189 goto out;
190
191 ret = snd_pcm_hw_constraint_integer(runtime,
192 SNDRV_PCM_HW_PARAM_PERIODS);
193 if (ret < 0)
194 goto out;
195
196 ret = -ENOMEM;
197 rtd = kmalloc(sizeof(*rtd), GFP_KERNEL);
198 if (!rtd)
199 goto out;
200 rtd->dma_desc_array =
201 dma_alloc_writecombine(substream->pcm->card->dev, PAGE_SIZE,
202 &rtd->dma_desc_array_phys, GFP_KERNEL);
203 if (!rtd->dma_desc_array)
204 goto err1;
205
206 runtime->private_data = rtd;
207 return 0;
208
209 err1:
210 kfree(rtd);
211 out:
212 return ret;
213}
214EXPORT_SYMBOL(__pxa2xx_pcm_open);
215
216int __pxa2xx_pcm_close(struct snd_pcm_substream *substream)
217{
218 struct snd_pcm_runtime *runtime = substream->runtime;
219 struct pxa2xx_runtime_data *rtd = runtime->private_data;
220
221 dma_free_writecombine(substream->pcm->card->dev, PAGE_SIZE,
222 rtd->dma_desc_array, rtd->dma_desc_array_phys);
223 kfree(rtd);
224 return 0;
225}
226EXPORT_SYMBOL(__pxa2xx_pcm_close);
227
228int pxa2xx_pcm_mmap(struct snd_pcm_substream *substream,
229 struct vm_area_struct *vma)
230{
231 struct snd_pcm_runtime *runtime = substream->runtime;
232 return dma_mmap_writecombine(substream->pcm->card->dev, vma,
233 runtime->dma_area,
234 runtime->dma_addr,
235 runtime->dma_bytes);
236}
237EXPORT_SYMBOL(pxa2xx_pcm_mmap);
238
239int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
240{
241 struct snd_pcm_substream *substream = pcm->streams[stream].substream;
242 struct snd_dma_buffer *buf = &substream->dma_buffer;
243 size_t size = pxa2xx_pcm_hardware.buffer_bytes_max;
244 buf->dev.type = SNDRV_DMA_TYPE_DEV;
245 buf->dev.dev = pcm->card->dev;
246 buf->private_data = NULL;
247 buf->area = dma_alloc_writecombine(pcm->card->dev, size,
248 &buf->addr, GFP_KERNEL);
249 if (!buf->area)
250 return -ENOMEM;
251 buf->bytes = size;
252 return 0;
253}
254EXPORT_SYMBOL(pxa2xx_pcm_preallocate_dma_buffer);
255
256void pxa2xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
257{
258 struct snd_pcm_substream *substream;
259 struct snd_dma_buffer *buf;
260 int stream;
261
262 for (stream = 0; stream < 2; stream++) {
263 substream = pcm->streams[stream].substream;
264 if (!substream)
265 continue;
266 buf = &substream->dma_buffer;
267 if (!buf->area)
268 continue;
269 dma_free_writecombine(pcm->card->dev, buf->bytes,
270 buf->area, buf->addr);
271 buf->area = NULL;
272 }
273}
274EXPORT_SYMBOL(pxa2xx_pcm_free_dma_buffers);
275
276MODULE_AUTHOR("Nicolas Pitre");
277MODULE_DESCRIPTION("Intel PXA2xx sound library");
278MODULE_LICENSE("GPL");
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,
diff --git a/sound/arm/pxa2xx-pcm.h b/sound/arm/pxa2xx-pcm.h
index b79f1e803780..5c4a4d38a083 100644
--- a/sound/arm/pxa2xx-pcm.h
+++ b/sound/arm/pxa2xx-pcm.h
@@ -9,14 +9,15 @@
9 * it under the terms of the GNU General Public License version 2 as 9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation. 10 * published by the Free Software Foundation.
11 */ 11 */
12#include <asm/dma.h>
12 13
13struct pxa2xx_pcm_dma_params { 14struct pxa2xx_runtime_data {
14 char *name; /* stream identifier */ 15 int dma_ch;
15 u32 dcmd; /* DMA descriptor dcmd field */ 16 struct pxa2xx_pcm_dma_params *params;
16 volatile u32 *drcmr; /* the DMA request channel to use */ 17 pxa_dma_desc *dma_desc_array;
17 u32 dev_addr; /* device physical address for DMA */ 18 dma_addr_t dma_desc_array_phys;
18}; 19};
19 20
20struct pxa2xx_pcm_client { 21struct pxa2xx_pcm_client {
21 struct pxa2xx_pcm_dma_params *playback_params; 22 struct pxa2xx_pcm_dma_params *playback_params;
22 struct pxa2xx_pcm_dma_params *capture_params; 23 struct pxa2xx_pcm_dma_params *capture_params;
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-10 11:16:51 -0500