Commit | Line | Data |
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2e74796a JN |
1 | /* |
2 | * omap-pcm.c -- ALSA PCM interface for the OMAP SoC | |
3 | * | |
4 | * Copyright (C) 2008 Nokia Corporation | |
5 | * | |
7ec41ee5 | 6 | * Contact: Jarkko Nikula <jarkko.nikula@bitmer.com> |
1c7687b9 | 7 | * Peter Ujfalusi <peter.ujfalusi@ti.com> |
2e74796a JN |
8 | * |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * version 2 as published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
21 | * 02110-1301 USA | |
22 | * | |
23 | */ | |
24 | ||
25 | #include <linux/dma-mapping.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
da155d5b | 27 | #include <linux/module.h> |
946cc36a | 28 | #include <linux/omap-dma.h> |
2e74796a JN |
29 | #include <sound/core.h> |
30 | #include <sound/pcm.h> | |
31 | #include <sound/pcm_params.h> | |
946cc36a | 32 | #include <sound/dmaengine_pcm.h> |
2e74796a | 33 | #include <sound/soc.h> |
76a77f47 | 34 | #include <sound/omap-pcm.h> |
2e74796a | 35 | |
27615a97 TL |
36 | #ifdef CONFIG_ARCH_OMAP1 |
37 | #define pcm_omap1510() cpu_is_omap1510() | |
38 | #else | |
39 | #define pcm_omap1510() 0 | |
40 | #endif | |
41 | ||
6742e15c | 42 | static struct snd_pcm_hardware omap_pcm_hardware = { |
2e74796a JN |
43 | .info = SNDRV_PCM_INFO_MMAP | |
44 | SNDRV_PCM_INFO_MMAP_VALID | | |
45 | SNDRV_PCM_INFO_INTERLEAVED | | |
46 | SNDRV_PCM_INFO_PAUSE | | |
b4173824 PU |
47 | SNDRV_PCM_INFO_RESUME | |
48 | SNDRV_PCM_INFO_NO_PERIOD_WAKEUP, | |
2e74796a JN |
49 | .period_bytes_min = 32, |
50 | .period_bytes_max = 64 * 1024, | |
51 | .periods_min = 2, | |
52 | .periods_max = 255, | |
53 | .buffer_bytes_max = 128 * 1024, | |
54 | }; | |
55 | ||
6742e15c JS |
56 | /* sDMA supports only 1, 2, and 4 byte transfer elements. */ |
57 | static void omap_pcm_limit_supported_formats(void) | |
58 | { | |
59 | int i; | |
60 | ||
61 | for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) { | |
62 | switch (snd_pcm_format_physical_width(i)) { | |
63 | case 8: | |
64 | case 16: | |
65 | case 32: | |
66 | omap_pcm_hardware.formats |= (1LL << i); | |
67 | break; | |
68 | default: | |
69 | break; | |
70 | } | |
71 | } | |
72 | } | |
73 | ||
2e74796a JN |
74 | /* this may get called several times by oss emulation */ |
75 | static int omap_pcm_hw_params(struct snd_pcm_substream *substream, | |
76 | struct snd_pcm_hw_params *params) | |
77 | { | |
78 | struct snd_pcm_runtime *runtime = substream->runtime; | |
79 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
5f712b2b | 80 | struct omap_pcm_dma_data *dma_data; |
946cc36a PU |
81 | struct dma_slave_config config; |
82 | struct dma_chan *chan; | |
2e74796a JN |
83 | int err = 0; |
84 | ||
f0fba2ad | 85 | dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); |
5f712b2b | 86 | |
1b4246a1 JS |
87 | /* return if this is a bufferless transfer e.g. |
88 | * codec <--> BT codec or GSM modem -- lg FIXME */ | |
2e74796a | 89 | if (!dma_data) |
1b4246a1 | 90 | return 0; |
2e74796a JN |
91 | |
92 | snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); | |
93 | runtime->dma_bytes = params_buffer_bytes(params); | |
94 | ||
946cc36a PU |
95 | chan = snd_dmaengine_pcm_get_chan(substream); |
96 | if (!chan) | |
97 | return -EINVAL; | |
2e74796a | 98 | |
946cc36a PU |
99 | /* fills in addr_width and direction */ |
100 | err = snd_hwparams_to_dma_slave_config(substream, params, &config); | |
101 | if (err) | |
102 | return err; | |
2e74796a | 103 | |
09ae3aaf LPC |
104 | snd_dmaengine_pcm_set_config_from_dai_data(substream, |
105 | snd_soc_dai_get_dma_data(rtd->cpu_dai, substream), | |
106 | &config); | |
2e74796a | 107 | |
946cc36a | 108 | return dmaengine_slave_config(chan, &config); |
2e74796a JN |
109 | } |
110 | ||
946cc36a | 111 | static int omap_pcm_hw_free(struct snd_pcm_substream *substream) |
2e74796a | 112 | { |
946cc36a | 113 | snd_pcm_set_runtime_buffer(substream, NULL); |
2e74796a JN |
114 | return 0; |
115 | } | |
116 | ||
2e74796a JN |
117 | static snd_pcm_uframes_t omap_pcm_pointer(struct snd_pcm_substream *substream) |
118 | { | |
2e74796a JN |
119 | snd_pcm_uframes_t offset; |
120 | ||
27615a97 | 121 | if (pcm_omap1510()) |
946cc36a PU |
122 | offset = snd_dmaengine_pcm_pointer_no_residue(substream); |
123 | else | |
124 | offset = snd_dmaengine_pcm_pointer(substream); | |
2e74796a JN |
125 | |
126 | return offset; | |
127 | } | |
128 | ||
129 | static int omap_pcm_open(struct snd_pcm_substream *substream) | |
130 | { | |
946cc36a | 131 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
09ae3aaf | 132 | struct snd_dmaengine_dai_dma_data *dma_data; |
f6becf0b | 133 | int ret; |
2e74796a JN |
134 | |
135 | snd_soc_set_runtime_hwparams(substream, &omap_pcm_hardware); | |
136 | ||
946cc36a | 137 | dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); |
a92b5317 | 138 | |
f6becf0b PU |
139 | /* DT boot: filter_data is the DMA name */ |
140 | if (rtd->cpu_dai->dev->of_node) { | |
141 | struct dma_chan *chan; | |
142 | ||
143 | chan = dma_request_slave_channel(rtd->cpu_dai->dev, | |
144 | dma_data->filter_data); | |
145 | ret = snd_dmaengine_pcm_open(substream, chan); | |
146 | } else { | |
147 | ret = snd_dmaengine_pcm_open_request_chan(substream, | |
148 | omap_dma_filter_fn, | |
149 | dma_data->filter_data); | |
150 | } | |
151 | return ret; | |
2e74796a JN |
152 | } |
153 | ||
2e74796a JN |
154 | static int omap_pcm_mmap(struct snd_pcm_substream *substream, |
155 | struct vm_area_struct *vma) | |
156 | { | |
157 | struct snd_pcm_runtime *runtime = substream->runtime; | |
158 | ||
f6e45661 LR |
159 | return dma_mmap_wc(substream->pcm->card->dev, vma, runtime->dma_area, |
160 | runtime->dma_addr, runtime->dma_bytes); | |
2e74796a JN |
161 | } |
162 | ||
b2a19d02 | 163 | static struct snd_pcm_ops omap_pcm_ops = { |
2e74796a | 164 | .open = omap_pcm_open, |
7c1c1d4a | 165 | .close = snd_dmaengine_pcm_close_release_chan, |
2e74796a JN |
166 | .ioctl = snd_pcm_lib_ioctl, |
167 | .hw_params = omap_pcm_hw_params, | |
168 | .hw_free = omap_pcm_hw_free, | |
abe99370 | 169 | .trigger = snd_dmaengine_pcm_trigger, |
2e74796a JN |
170 | .pointer = omap_pcm_pointer, |
171 | .mmap = omap_pcm_mmap, | |
172 | }; | |
173 | ||
2e74796a JN |
174 | static int omap_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, |
175 | int stream) | |
176 | { | |
177 | struct snd_pcm_substream *substream = pcm->streams[stream].substream; | |
178 | struct snd_dma_buffer *buf = &substream->dma_buffer; | |
179 | size_t size = omap_pcm_hardware.buffer_bytes_max; | |
180 | ||
181 | buf->dev.type = SNDRV_DMA_TYPE_DEV; | |
182 | buf->dev.dev = pcm->card->dev; | |
183 | buf->private_data = NULL; | |
f6e45661 | 184 | buf->area = dma_alloc_wc(pcm->card->dev, size, &buf->addr, GFP_KERNEL); |
2e74796a JN |
185 | if (!buf->area) |
186 | return -ENOMEM; | |
187 | ||
188 | buf->bytes = size; | |
189 | return 0; | |
190 | } | |
191 | ||
192 | static void omap_pcm_free_dma_buffers(struct snd_pcm *pcm) | |
193 | { | |
194 | struct snd_pcm_substream *substream; | |
195 | struct snd_dma_buffer *buf; | |
196 | int stream; | |
197 | ||
198 | for (stream = 0; stream < 2; stream++) { | |
199 | substream = pcm->streams[stream].substream; | |
200 | if (!substream) | |
201 | continue; | |
202 | ||
203 | buf = &substream->dma_buffer; | |
204 | if (!buf->area) | |
205 | continue; | |
206 | ||
f6e45661 | 207 | dma_free_wc(pcm->card->dev, buf->bytes, buf->area, buf->addr); |
2e74796a JN |
208 | buf->area = NULL; |
209 | } | |
210 | } | |
211 | ||
552d1ef6 | 212 | static int omap_pcm_new(struct snd_soc_pcm_runtime *rtd) |
2e74796a | 213 | { |
552d1ef6 | 214 | struct snd_card *card = rtd->card->snd_card; |
552d1ef6 | 215 | struct snd_pcm *pcm = rtd->pcm; |
c9bd5e69 | 216 | int ret; |
2e74796a | 217 | |
d51199a8 | 218 | ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); |
c9bd5e69 RK |
219 | if (ret) |
220 | return ret; | |
2e74796a | 221 | |
25e9e756 | 222 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) { |
2e74796a JN |
223 | ret = omap_pcm_preallocate_dma_buffer(pcm, |
224 | SNDRV_PCM_STREAM_PLAYBACK); | |
225 | if (ret) | |
226 | goto out; | |
227 | } | |
228 | ||
25e9e756 | 229 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { |
2e74796a JN |
230 | ret = omap_pcm_preallocate_dma_buffer(pcm, |
231 | SNDRV_PCM_STREAM_CAPTURE); | |
232 | if (ret) | |
233 | goto out; | |
234 | } | |
235 | ||
236 | out: | |
fad9365b OM |
237 | /* free preallocated buffers in case of error */ |
238 | if (ret) | |
239 | omap_pcm_free_dma_buffers(pcm); | |
240 | ||
2e74796a JN |
241 | return ret; |
242 | } | |
243 | ||
f0fba2ad LG |
244 | static struct snd_soc_platform_driver omap_soc_platform = { |
245 | .ops = &omap_pcm_ops, | |
2e74796a JN |
246 | .pcm_new = omap_pcm_new, |
247 | .pcm_free = omap_pcm_free_dma_buffers, | |
248 | }; | |
2e74796a | 249 | |
fe7b5868 PU |
250 | int omap_pcm_platform_register(struct device *dev) |
251 | { | |
6742e15c | 252 | omap_pcm_limit_supported_formats(); |
fe7b5868 PU |
253 | return devm_snd_soc_register_platform(dev, &omap_soc_platform); |
254 | } | |
255 | EXPORT_SYMBOL_GPL(omap_pcm_platform_register); | |
256 | ||
7ec41ee5 | 257 | MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>"); |
2e74796a JN |
258 | MODULE_DESCRIPTION("OMAP PCM DMA module"); |
259 | MODULE_LICENSE("GPL"); |