Commit | Line | Data |
---|---|---|
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 | ||
2961d670 | 61 | for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) { |
6742e15c JS |
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 | ||
989ff775 JL |
85 | memset(&config, 0x00, sizeof(config)); |
86 | ||
f0fba2ad | 87 | dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); |
5f712b2b | 88 | |
1b4246a1 JS |
89 | /* return if this is a bufferless transfer e.g. |
90 | * codec <--> BT codec or GSM modem -- lg FIXME */ | |
2e74796a | 91 | if (!dma_data) |
1b4246a1 | 92 | return 0; |
2e74796a JN |
93 | |
94 | snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); | |
95 | runtime->dma_bytes = params_buffer_bytes(params); | |
96 | ||
946cc36a PU |
97 | chan = snd_dmaengine_pcm_get_chan(substream); |
98 | if (!chan) | |
99 | return -EINVAL; | |
2e74796a | 100 | |
946cc36a PU |
101 | /* fills in addr_width and direction */ |
102 | err = snd_hwparams_to_dma_slave_config(substream, params, &config); | |
103 | if (err) | |
104 | return err; | |
2e74796a | 105 | |
09ae3aaf LPC |
106 | snd_dmaengine_pcm_set_config_from_dai_data(substream, |
107 | snd_soc_dai_get_dma_data(rtd->cpu_dai, substream), | |
108 | &config); | |
2e74796a | 109 | |
946cc36a | 110 | return dmaengine_slave_config(chan, &config); |
2e74796a JN |
111 | } |
112 | ||
946cc36a | 113 | static int omap_pcm_hw_free(struct snd_pcm_substream *substream) |
2e74796a | 114 | { |
946cc36a | 115 | snd_pcm_set_runtime_buffer(substream, NULL); |
2e74796a JN |
116 | return 0; |
117 | } | |
118 | ||
2e74796a JN |
119 | static snd_pcm_uframes_t omap_pcm_pointer(struct snd_pcm_substream *substream) |
120 | { | |
2e74796a JN |
121 | snd_pcm_uframes_t offset; |
122 | ||
27615a97 | 123 | if (pcm_omap1510()) |
946cc36a PU |
124 | offset = snd_dmaengine_pcm_pointer_no_residue(substream); |
125 | else | |
126 | offset = snd_dmaengine_pcm_pointer(substream); | |
2e74796a JN |
127 | |
128 | return offset; | |
129 | } | |
130 | ||
131 | static int omap_pcm_open(struct snd_pcm_substream *substream) | |
132 | { | |
946cc36a | 133 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
09ae3aaf | 134 | struct snd_dmaengine_dai_dma_data *dma_data; |
f6becf0b | 135 | int ret; |
2e74796a JN |
136 | |
137 | snd_soc_set_runtime_hwparams(substream, &omap_pcm_hardware); | |
138 | ||
946cc36a | 139 | dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); |
a92b5317 | 140 | |
f6becf0b PU |
141 | /* DT boot: filter_data is the DMA name */ |
142 | if (rtd->cpu_dai->dev->of_node) { | |
143 | struct dma_chan *chan; | |
144 | ||
145 | chan = dma_request_slave_channel(rtd->cpu_dai->dev, | |
146 | dma_data->filter_data); | |
147 | ret = snd_dmaengine_pcm_open(substream, chan); | |
148 | } else { | |
149 | ret = snd_dmaengine_pcm_open_request_chan(substream, | |
150 | omap_dma_filter_fn, | |
151 | dma_data->filter_data); | |
152 | } | |
153 | return ret; | |
2e74796a JN |
154 | } |
155 | ||
2e74796a JN |
156 | static int omap_pcm_mmap(struct snd_pcm_substream *substream, |
157 | struct vm_area_struct *vma) | |
158 | { | |
159 | struct snd_pcm_runtime *runtime = substream->runtime; | |
160 | ||
f6e45661 LR |
161 | return dma_mmap_wc(substream->pcm->card->dev, vma, runtime->dma_area, |
162 | runtime->dma_addr, runtime->dma_bytes); | |
2e74796a JN |
163 | } |
164 | ||
b2a19d02 | 165 | static struct snd_pcm_ops omap_pcm_ops = { |
2e74796a | 166 | .open = omap_pcm_open, |
7c1c1d4a | 167 | .close = snd_dmaengine_pcm_close_release_chan, |
2e74796a JN |
168 | .ioctl = snd_pcm_lib_ioctl, |
169 | .hw_params = omap_pcm_hw_params, | |
170 | .hw_free = omap_pcm_hw_free, | |
abe99370 | 171 | .trigger = snd_dmaengine_pcm_trigger, |
2e74796a JN |
172 | .pointer = omap_pcm_pointer, |
173 | .mmap = omap_pcm_mmap, | |
174 | }; | |
175 | ||
2e74796a JN |
176 | static int omap_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, |
177 | int stream) | |
178 | { | |
179 | struct snd_pcm_substream *substream = pcm->streams[stream].substream; | |
180 | struct snd_dma_buffer *buf = &substream->dma_buffer; | |
181 | size_t size = omap_pcm_hardware.buffer_bytes_max; | |
182 | ||
183 | buf->dev.type = SNDRV_DMA_TYPE_DEV; | |
184 | buf->dev.dev = pcm->card->dev; | |
185 | buf->private_data = NULL; | |
f6e45661 | 186 | buf->area = dma_alloc_wc(pcm->card->dev, size, &buf->addr, GFP_KERNEL); |
2e74796a JN |
187 | if (!buf->area) |
188 | return -ENOMEM; | |
189 | ||
190 | buf->bytes = size; | |
191 | return 0; | |
192 | } | |
193 | ||
194 | static void omap_pcm_free_dma_buffers(struct snd_pcm *pcm) | |
195 | { | |
196 | struct snd_pcm_substream *substream; | |
197 | struct snd_dma_buffer *buf; | |
198 | int stream; | |
199 | ||
200 | for (stream = 0; stream < 2; stream++) { | |
201 | substream = pcm->streams[stream].substream; | |
202 | if (!substream) | |
203 | continue; | |
204 | ||
205 | buf = &substream->dma_buffer; | |
206 | if (!buf->area) | |
207 | continue; | |
208 | ||
f6e45661 | 209 | dma_free_wc(pcm->card->dev, buf->bytes, buf->area, buf->addr); |
2e74796a JN |
210 | buf->area = NULL; |
211 | } | |
212 | } | |
213 | ||
552d1ef6 | 214 | static int omap_pcm_new(struct snd_soc_pcm_runtime *rtd) |
2e74796a | 215 | { |
552d1ef6 | 216 | struct snd_card *card = rtd->card->snd_card; |
552d1ef6 | 217 | struct snd_pcm *pcm = rtd->pcm; |
c9bd5e69 | 218 | int ret; |
2e74796a | 219 | |
d51199a8 | 220 | ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); |
c9bd5e69 RK |
221 | if (ret) |
222 | return ret; | |
2e74796a | 223 | |
25e9e756 | 224 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) { |
2e74796a JN |
225 | ret = omap_pcm_preallocate_dma_buffer(pcm, |
226 | SNDRV_PCM_STREAM_PLAYBACK); | |
227 | if (ret) | |
228 | goto out; | |
229 | } | |
230 | ||
25e9e756 | 231 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { |
2e74796a JN |
232 | ret = omap_pcm_preallocate_dma_buffer(pcm, |
233 | SNDRV_PCM_STREAM_CAPTURE); | |
234 | if (ret) | |
235 | goto out; | |
236 | } | |
237 | ||
238 | out: | |
fad9365b OM |
239 | /* free preallocated buffers in case of error */ |
240 | if (ret) | |
241 | omap_pcm_free_dma_buffers(pcm); | |
242 | ||
2e74796a JN |
243 | return ret; |
244 | } | |
245 | ||
f0fba2ad LG |
246 | static struct snd_soc_platform_driver omap_soc_platform = { |
247 | .ops = &omap_pcm_ops, | |
2e74796a JN |
248 | .pcm_new = omap_pcm_new, |
249 | .pcm_free = omap_pcm_free_dma_buffers, | |
250 | }; | |
2e74796a | 251 | |
fe7b5868 PU |
252 | int omap_pcm_platform_register(struct device *dev) |
253 | { | |
6742e15c | 254 | omap_pcm_limit_supported_formats(); |
fe7b5868 PU |
255 | return devm_snd_soc_register_platform(dev, &omap_soc_platform); |
256 | } | |
257 | EXPORT_SYMBOL_GPL(omap_pcm_platform_register); | |
258 | ||
7ec41ee5 | 259 | MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>"); |
2e74796a JN |
260 | MODULE_DESCRIPTION("OMAP PCM DMA module"); |
261 | MODULE_LICENSE("GPL"); |