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