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7a824e21 ZG |
1 | /* |
2 | * linux/sound/soc/pxa/mmp-pcm.c | |
3 | * | |
4 | * Copyright (C) 2011 Marvell International Ltd. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | */ | |
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/dma-mapping.h> | |
17 | #include <linux/dmaengine.h> | |
ca057410 | 18 | #include <linux/platform_data/dma-mmp_tdma.h> |
7a824e21 | 19 | #include <linux/platform_data/mmp_audio.h> |
d65a1458 | 20 | |
7a824e21 ZG |
21 | #include <sound/pxa2xx-lib.h> |
22 | #include <sound/core.h> | |
23 | #include <sound/pcm.h> | |
24 | #include <sound/pcm_params.h> | |
25 | #include <sound/soc.h> | |
7a824e21 ZG |
26 | #include <sound/dmaengine_pcm.h> |
27 | ||
28 | struct mmp_dma_data { | |
29 | int ssp_id; | |
30 | struct resource *dma_res; | |
31 | }; | |
32 | ||
33 | #define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP | \ | |
34 | SNDRV_PCM_INFO_MMAP_VALID | \ | |
35 | SNDRV_PCM_INFO_INTERLEAVED | \ | |
36 | SNDRV_PCM_INFO_PAUSE | \ | |
37 | SNDRV_PCM_INFO_RESUME) | |
38 | ||
7a824e21 ZG |
39 | static struct snd_pcm_hardware mmp_pcm_hardware[] = { |
40 | { | |
41 | .info = MMP_PCM_INFO, | |
7a824e21 ZG |
42 | .period_bytes_min = 1024, |
43 | .period_bytes_max = 2048, | |
44 | .periods_min = 2, | |
45 | .periods_max = 32, | |
46 | .buffer_bytes_max = 4096, | |
47 | .fifo_size = 32, | |
48 | }, | |
49 | { | |
50 | .info = MMP_PCM_INFO, | |
7a824e21 ZG |
51 | .period_bytes_min = 1024, |
52 | .period_bytes_max = 2048, | |
53 | .periods_min = 2, | |
54 | .periods_max = 32, | |
55 | .buffer_bytes_max = 4096, | |
56 | .fifo_size = 32, | |
57 | }, | |
58 | }; | |
59 | ||
60 | static int mmp_pcm_hw_params(struct snd_pcm_substream *substream, | |
61 | struct snd_pcm_hw_params *params) | |
62 | { | |
63 | struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream); | |
7a824e21 ZG |
64 | struct dma_slave_config slave_config; |
65 | int ret; | |
66 | ||
48b752ac QZ |
67 | ret = |
68 | snd_dmaengine_pcm_prepare_slave_config(substream, params, | |
69 | &slave_config); | |
7a824e21 ZG |
70 | if (ret) |
71 | return ret; | |
72 | ||
7a824e21 ZG |
73 | ret = dmaengine_slave_config(chan, &slave_config); |
74 | if (ret) | |
75 | return ret; | |
76 | ||
77 | snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); | |
78 | ||
79 | return 0; | |
80 | } | |
81 | ||
82 | static bool filter(struct dma_chan *chan, void *param) | |
83 | { | |
84 | struct mmp_dma_data *dma_data = param; | |
85 | bool found = false; | |
86 | char *devname; | |
87 | ||
88 | devname = kasprintf(GFP_KERNEL, "%s.%d", dma_data->dma_res->name, | |
89 | dma_data->ssp_id); | |
90 | if ((strcmp(dev_name(chan->device->dev), devname) == 0) && | |
91 | (chan->chan_id == dma_data->dma_res->start)) { | |
92 | found = true; | |
93 | } | |
94 | ||
95 | kfree(devname); | |
96 | return found; | |
97 | } | |
98 | ||
99 | static int mmp_pcm_open(struct snd_pcm_substream *substream) | |
100 | { | |
101 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
102 | struct platform_device *pdev = to_platform_device(rtd->platform->dev); | |
103 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
ac581e60 | 104 | struct mmp_dma_data dma_data; |
7a824e21 | 105 | struct resource *r; |
7a824e21 ZG |
106 | |
107 | r = platform_get_resource(pdev, IORESOURCE_DMA, substream->stream); | |
108 | if (!r) | |
109 | return -EBUSY; | |
110 | ||
111 | snd_soc_set_runtime_hwparams(substream, | |
112 | &mmp_pcm_hardware[substream->stream]); | |
7a824e21 | 113 | |
ac581e60 LPC |
114 | dma_data.dma_res = r; |
115 | dma_data.ssp_id = cpu_dai->id; | |
7a824e21 | 116 | |
7c1c1d4a LPC |
117 | return snd_dmaengine_pcm_open_request_chan(substream, filter, |
118 | &dma_data); | |
7a824e21 ZG |
119 | } |
120 | ||
121 | static int mmp_pcm_mmap(struct snd_pcm_substream *substream, | |
122 | struct vm_area_struct *vma) | |
123 | { | |
124 | struct snd_pcm_runtime *runtime = substream->runtime; | |
125 | unsigned long off = vma->vm_pgoff; | |
126 | ||
127 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
128 | return remap_pfn_range(vma, vma->vm_start, | |
129 | __phys_to_pfn(runtime->dma_addr) + off, | |
130 | vma->vm_end - vma->vm_start, vma->vm_page_prot); | |
131 | } | |
132 | ||
60e10d2f | 133 | static struct snd_pcm_ops mmp_pcm_ops = { |
7a824e21 | 134 | .open = mmp_pcm_open, |
7c1c1d4a | 135 | .close = snd_dmaengine_pcm_close_release_chan, |
7a824e21 ZG |
136 | .ioctl = snd_pcm_lib_ioctl, |
137 | .hw_params = mmp_pcm_hw_params, | |
138 | .trigger = snd_dmaengine_pcm_trigger, | |
139 | .pointer = snd_dmaengine_pcm_pointer, | |
140 | .mmap = mmp_pcm_mmap, | |
141 | }; | |
142 | ||
143 | static void mmp_pcm_free_dma_buffers(struct snd_pcm *pcm) | |
144 | { | |
145 | struct snd_pcm_substream *substream; | |
146 | struct snd_dma_buffer *buf; | |
147 | int stream; | |
148 | struct gen_pool *gpool; | |
149 | ||
150 | gpool = sram_get_gpool("asram"); | |
151 | if (!gpool) | |
152 | return; | |
153 | ||
154 | for (stream = 0; stream < 2; stream++) { | |
155 | size_t size = mmp_pcm_hardware[stream].buffer_bytes_max; | |
156 | ||
157 | substream = pcm->streams[stream].substream; | |
158 | if (!substream) | |
159 | continue; | |
160 | ||
161 | buf = &substream->dma_buffer; | |
162 | if (!buf->area) | |
163 | continue; | |
164 | gen_pool_free(gpool, (unsigned long)buf->area, size); | |
165 | buf->area = NULL; | |
166 | } | |
167 | ||
168 | return; | |
169 | } | |
170 | ||
171 | static int mmp_pcm_preallocate_dma_buffer(struct snd_pcm_substream *substream, | |
172 | int stream) | |
173 | { | |
174 | struct snd_dma_buffer *buf = &substream->dma_buffer; | |
175 | size_t size = mmp_pcm_hardware[stream].buffer_bytes_max; | |
176 | struct gen_pool *gpool; | |
177 | ||
178 | buf->dev.type = SNDRV_DMA_TYPE_DEV; | |
179 | buf->dev.dev = substream->pcm->card->dev; | |
180 | buf->private_data = NULL; | |
181 | ||
182 | gpool = sram_get_gpool("asram"); | |
183 | if (!gpool) | |
184 | return -ENOMEM; | |
185 | ||
92a2e1cb | 186 | buf->area = gen_pool_dma_alloc(gpool, size, &buf->addr); |
7a824e21 ZG |
187 | if (!buf->area) |
188 | return -ENOMEM; | |
7a824e21 ZG |
189 | buf->bytes = size; |
190 | return 0; | |
191 | } | |
192 | ||
60e10d2f | 193 | static int mmp_pcm_new(struct snd_soc_pcm_runtime *rtd) |
7a824e21 ZG |
194 | { |
195 | struct snd_pcm_substream *substream; | |
196 | struct snd_pcm *pcm = rtd->pcm; | |
197 | int ret = 0, stream; | |
198 | ||
199 | for (stream = 0; stream < 2; stream++) { | |
200 | substream = pcm->streams[stream].substream; | |
201 | ||
202 | ret = mmp_pcm_preallocate_dma_buffer(substream, stream); | |
203 | if (ret) | |
204 | goto err; | |
205 | } | |
206 | ||
207 | return 0; | |
208 | ||
209 | err: | |
210 | mmp_pcm_free_dma_buffers(pcm); | |
211 | return ret; | |
212 | } | |
213 | ||
60e10d2f | 214 | static struct snd_soc_platform_driver mmp_soc_platform = { |
7a824e21 ZG |
215 | .ops = &mmp_pcm_ops, |
216 | .pcm_new = mmp_pcm_new, | |
217 | .pcm_free = mmp_pcm_free_dma_buffers, | |
218 | }; | |
219 | ||
570f6fe1 | 220 | static int mmp_pcm_probe(struct platform_device *pdev) |
7a824e21 ZG |
221 | { |
222 | struct mmp_audio_platdata *pdata = pdev->dev.platform_data; | |
223 | ||
224 | if (pdata) { | |
225 | mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].buffer_bytes_max = | |
226 | pdata->buffer_max_playback; | |
227 | mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].period_bytes_max = | |
228 | pdata->period_max_playback; | |
229 | mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].buffer_bytes_max = | |
230 | pdata->buffer_max_capture; | |
231 | mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].period_bytes_max = | |
232 | pdata->period_max_capture; | |
233 | } | |
234 | return snd_soc_register_platform(&pdev->dev, &mmp_soc_platform); | |
235 | } | |
236 | ||
570f6fe1 | 237 | static int mmp_pcm_remove(struct platform_device *pdev) |
7a824e21 ZG |
238 | { |
239 | snd_soc_unregister_platform(&pdev->dev); | |
240 | return 0; | |
241 | } | |
242 | ||
243 | static struct platform_driver mmp_pcm_driver = { | |
244 | .driver = { | |
245 | .name = "mmp-pcm-audio", | |
246 | .owner = THIS_MODULE, | |
247 | }, | |
248 | ||
249 | .probe = mmp_pcm_probe, | |
570f6fe1 | 250 | .remove = mmp_pcm_remove, |
7a824e21 ZG |
251 | }; |
252 | ||
253 | module_platform_driver(mmp_pcm_driver); | |
254 | ||
255 | MODULE_AUTHOR("Leo Yan <leoy@marvell.com>"); | |
256 | MODULE_DESCRIPTION("MMP Soc Audio DMA module"); | |
257 | MODULE_LICENSE("GPL"); |