Commit | Line | Data |
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f11a96d5 LG |
1 | /* |
2 | * linux/sound/arm/pxa2xx-pcm.c -- ALSA PCM interface for the Intel PXA2xx chip | |
3 | * | |
4 | * Author: Nicolas Pitre | |
5 | * Created: Nov 30, 2004 | |
6 | * Copyright: (C) 2004 MontaVista Software, Inc. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
f11a96d5 LG |
13 | #include <linux/dma-mapping.h> |
14 | ||
f11a96d5 | 15 | #include <sound/core.h> |
f11a96d5 | 16 | #include <sound/soc.h> |
a6d77317 | 17 | #include <sound/pxa2xx-lib.h> |
f11a96d5 | 18 | |
a6d77317 | 19 | #include "../../arm/pxa2xx-pcm.h" |
f11a96d5 LG |
20 | |
21 | static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream, | |
22 | struct snd_pcm_hw_params *params) | |
23 | { | |
24 | struct snd_pcm_runtime *runtime = substream->runtime; | |
25 | struct pxa2xx_runtime_data *prtd = runtime->private_data; | |
26 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
5f712b2b | 27 | struct pxa2xx_pcm_dma_params *dma; |
f11a96d5 LG |
28 | int ret; |
29 | ||
f0fba2ad | 30 | dma = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); |
5f712b2b | 31 | |
a8f5d0a5 AJ |
32 | /* return if this is a bufferless transfer e.g. |
33 | * codec <--> BT codec or GSM modem -- lg FIXME */ | |
b32432e3 MB |
34 | if (!dma) |
35 | return 0; | |
a8f5d0a5 | 36 | |
f11a96d5 LG |
37 | /* this may get called several times by oss emulation |
38 | * with different params */ | |
39 | if (prtd->params == NULL) { | |
40 | prtd->params = dma; | |
41 | ret = pxa_request_dma(prtd->params->name, DMA_PRIO_LOW, | |
42 | pxa2xx_pcm_dma_irq, substream); | |
43 | if (ret < 0) | |
44 | return ret; | |
45 | prtd->dma_ch = ret; | |
46 | } else if (prtd->params != dma) { | |
47 | pxa_free_dma(prtd->dma_ch); | |
48 | prtd->params = dma; | |
49 | ret = pxa_request_dma(prtd->params->name, DMA_PRIO_LOW, | |
50 | pxa2xx_pcm_dma_irq, substream); | |
51 | if (ret < 0) | |
52 | return ret; | |
53 | prtd->dma_ch = ret; | |
54 | } | |
55 | ||
a6d77317 | 56 | return __pxa2xx_pcm_hw_params(substream, params); |
f11a96d5 LG |
57 | } |
58 | ||
59 | static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream) | |
60 | { | |
61 | struct pxa2xx_runtime_data *prtd = substream->runtime->private_data; | |
62 | ||
a6d77317 | 63 | __pxa2xx_pcm_hw_free(substream); |
f11a96d5 | 64 | |
9bef6489 | 65 | if (prtd->dma_ch >= 0) { |
f11a96d5 | 66 | pxa_free_dma(prtd->dma_ch); |
9bef6489 | 67 | prtd->dma_ch = -1; |
f11a96d5 LG |
68 | } |
69 | ||
70 | return 0; | |
71 | } | |
72 | ||
0e734ad5 | 73 | static struct snd_pcm_ops pxa2xx_pcm_ops = { |
a6d77317 DB |
74 | .open = __pxa2xx_pcm_open, |
75 | .close = __pxa2xx_pcm_close, | |
f11a96d5 LG |
76 | .ioctl = snd_pcm_lib_ioctl, |
77 | .hw_params = pxa2xx_pcm_hw_params, | |
78 | .hw_free = pxa2xx_pcm_hw_free, | |
a6d77317 | 79 | .prepare = __pxa2xx_pcm_prepare, |
f11a96d5 LG |
80 | .trigger = pxa2xx_pcm_trigger, |
81 | .pointer = pxa2xx_pcm_pointer, | |
82 | .mmap = pxa2xx_pcm_mmap, | |
83 | }; | |
84 | ||
284901a9 | 85 | static u64 pxa2xx_pcm_dmamask = DMA_BIT_MASK(32); |
f11a96d5 | 86 | |
8a33de9e | 87 | static int pxa2xx_soc_pcm_new(struct snd_card *card, struct snd_soc_dai *dai, |
f11a96d5 LG |
88 | struct snd_pcm *pcm) |
89 | { | |
90 | int ret = 0; | |
91 | ||
92 | if (!card->dev->dma_mask) | |
93 | card->dev->dma_mask = &pxa2xx_pcm_dmamask; | |
94 | if (!card->dev->coherent_dma_mask) | |
284901a9 | 95 | card->dev->coherent_dma_mask = DMA_BIT_MASK(32); |
f11a96d5 | 96 | |
f0fba2ad | 97 | if (dai->driver->playback.channels_min) { |
f11a96d5 LG |
98 | ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, |
99 | SNDRV_PCM_STREAM_PLAYBACK); | |
100 | if (ret) | |
101 | goto out; | |
102 | } | |
103 | ||
f0fba2ad | 104 | if (dai->driver->capture.channels_min) { |
f11a96d5 LG |
105 | ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, |
106 | SNDRV_PCM_STREAM_CAPTURE); | |
107 | if (ret) | |
108 | goto out; | |
109 | } | |
110 | out: | |
111 | return ret; | |
112 | } | |
113 | ||
f0fba2ad LG |
114 | static struct snd_soc_platform_driver pxa2xx_soc_platform = { |
115 | .ops = &pxa2xx_pcm_ops, | |
8a33de9e | 116 | .pcm_new = pxa2xx_soc_pcm_new, |
f11a96d5 LG |
117 | .pcm_free = pxa2xx_pcm_free_dma_buffers, |
118 | }; | |
f11a96d5 | 119 | |
f0fba2ad | 120 | static int __devinit pxa2xx_soc_platform_probe(struct platform_device *pdev) |
958e792c | 121 | { |
f0fba2ad | 122 | return snd_soc_register_platform(&pdev->dev, &pxa2xx_soc_platform); |
958e792c | 123 | } |
958e792c | 124 | |
f0fba2ad | 125 | static int __devexit pxa2xx_soc_platform_remove(struct platform_device *pdev) |
958e792c | 126 | { |
f0fba2ad LG |
127 | snd_soc_unregister_platform(&pdev->dev); |
128 | return 0; | |
129 | } | |
130 | ||
131 | static struct platform_driver pxa_pcm_driver = { | |
132 | .driver = { | |
133 | .name = "pxa-pcm-audio", | |
134 | .owner = THIS_MODULE, | |
135 | }, | |
136 | ||
137 | .probe = pxa2xx_soc_platform_probe, | |
138 | .remove = __devexit_p(pxa2xx_soc_platform_remove), | |
139 | }; | |
140 | ||
141 | static int __init snd_pxa_pcm_init(void) | |
142 | { | |
143 | return platform_driver_register(&pxa_pcm_driver); | |
144 | } | |
145 | module_init(snd_pxa_pcm_init); | |
146 | ||
147 | static void __exit snd_pxa_pcm_exit(void) | |
148 | { | |
149 | platform_driver_unregister(&pxa_pcm_driver); | |
958e792c | 150 | } |
f0fba2ad | 151 | module_exit(snd_pxa_pcm_exit); |
958e792c | 152 | |
f11a96d5 LG |
153 | MODULE_AUTHOR("Nicolas Pitre"); |
154 | MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module"); | |
155 | MODULE_LICENSE("GPL"); |