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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
7a824e21 ZG |
2 | /* |
3 | * linux/sound/soc/pxa/mmp-pcm.c | |
4 | * | |
5 | * Copyright (C) 2011 Marvell International Ltd. | |
7a824e21 ZG |
6 | */ |
7 | #include <linux/module.h> | |
8 | #include <linux/init.h> | |
9 | #include <linux/platform_device.h> | |
10 | #include <linux/slab.h> | |
11 | #include <linux/dma-mapping.h> | |
12 | #include <linux/dmaengine.h> | |
ca057410 | 13 | #include <linux/platform_data/dma-mmp_tdma.h> |
7a824e21 | 14 | #include <linux/platform_data/mmp_audio.h> |
d65a1458 | 15 | |
7a824e21 ZG |
16 | #include <sound/pxa2xx-lib.h> |
17 | #include <sound/core.h> | |
18 | #include <sound/pcm.h> | |
19 | #include <sound/pcm_params.h> | |
20 | #include <sound/soc.h> | |
7a824e21 ZG |
21 | #include <sound/dmaengine_pcm.h> |
22 | ||
797d1697 KM |
23 | #define DRV_NAME "mmp-pcm" |
24 | ||
7a824e21 ZG |
25 | struct mmp_dma_data { |
26 | int ssp_id; | |
27 | struct resource *dma_res; | |
28 | }; | |
29 | ||
30 | #define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP | \ | |
31 | SNDRV_PCM_INFO_MMAP_VALID | \ | |
32 | SNDRV_PCM_INFO_INTERLEAVED | \ | |
33 | SNDRV_PCM_INFO_PAUSE | \ | |
a22e2922 QZ |
34 | SNDRV_PCM_INFO_RESUME | \ |
35 | SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) | |
7a824e21 | 36 | |
7a824e21 ZG |
37 | static struct snd_pcm_hardware mmp_pcm_hardware[] = { |
38 | { | |
39 | .info = MMP_PCM_INFO, | |
7a824e21 ZG |
40 | .period_bytes_min = 1024, |
41 | .period_bytes_max = 2048, | |
42 | .periods_min = 2, | |
43 | .periods_max = 32, | |
44 | .buffer_bytes_max = 4096, | |
45 | .fifo_size = 32, | |
46 | }, | |
47 | { | |
48 | .info = MMP_PCM_INFO, | |
7a824e21 ZG |
49 | .period_bytes_min = 1024, |
50 | .period_bytes_max = 2048, | |
51 | .periods_min = 2, | |
52 | .periods_max = 32, | |
53 | .buffer_bytes_max = 4096, | |
54 | .fifo_size = 32, | |
55 | }, | |
56 | }; | |
57 | ||
58 | static int mmp_pcm_hw_params(struct snd_pcm_substream *substream, | |
59 | struct snd_pcm_hw_params *params) | |
60 | { | |
61 | struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream); | |
7a824e21 ZG |
62 | struct dma_slave_config slave_config; |
63 | int ret; | |
64 | ||
48b752ac QZ |
65 | ret = |
66 | snd_dmaengine_pcm_prepare_slave_config(substream, params, | |
67 | &slave_config); | |
7a824e21 ZG |
68 | if (ret) |
69 | return ret; | |
70 | ||
7a824e21 ZG |
71 | ret = dmaengine_slave_config(chan, &slave_config); |
72 | if (ret) | |
73 | return ret; | |
74 | ||
75 | snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
80 | static bool filter(struct dma_chan *chan, void *param) | |
81 | { | |
82 | struct mmp_dma_data *dma_data = param; | |
83 | bool found = false; | |
84 | char *devname; | |
85 | ||
86 | devname = kasprintf(GFP_KERNEL, "%s.%d", dma_data->dma_res->name, | |
87 | dma_data->ssp_id); | |
88 | if ((strcmp(dev_name(chan->device->dev), devname) == 0) && | |
89 | (chan->chan_id == dma_data->dma_res->start)) { | |
90 | found = true; | |
91 | } | |
92 | ||
93 | kfree(devname); | |
94 | return found; | |
95 | } | |
96 | ||
97 | static int mmp_pcm_open(struct snd_pcm_substream *substream) | |
98 | { | |
99 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
797d1697 KM |
100 | struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME); |
101 | struct platform_device *pdev = to_platform_device(component->dev); | |
7a824e21 | 102 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
ac581e60 | 103 | struct mmp_dma_data dma_data; |
7a824e21 | 104 | struct resource *r; |
7a824e21 ZG |
105 | |
106 | r = platform_get_resource(pdev, IORESOURCE_DMA, substream->stream); | |
107 | if (!r) | |
108 | return -EBUSY; | |
109 | ||
110 | snd_soc_set_runtime_hwparams(substream, | |
111 | &mmp_pcm_hardware[substream->stream]); | |
7a824e21 | 112 | |
ac581e60 LPC |
113 | dma_data.dma_res = r; |
114 | dma_data.ssp_id = cpu_dai->id; | |
7a824e21 | 115 | |
7c1c1d4a LPC |
116 | return snd_dmaengine_pcm_open_request_chan(substream, filter, |
117 | &dma_data); | |
7a824e21 ZG |
118 | } |
119 | ||
120 | static int mmp_pcm_mmap(struct snd_pcm_substream *substream, | |
121 | struct vm_area_struct *vma) | |
122 | { | |
123 | struct snd_pcm_runtime *runtime = substream->runtime; | |
124 | unsigned long off = vma->vm_pgoff; | |
125 | ||
126 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
127 | return remap_pfn_range(vma, vma->vm_start, | |
128 | __phys_to_pfn(runtime->dma_addr) + off, | |
129 | vma->vm_end - vma->vm_start, vma->vm_page_prot); | |
130 | } | |
131 | ||
d7622fa7 | 132 | static const struct snd_pcm_ops mmp_pcm_ops = { |
7a824e21 | 133 | .open = mmp_pcm_open, |
7c1c1d4a | 134 | .close = snd_dmaengine_pcm_close_release_chan, |
7a824e21 ZG |
135 | .ioctl = snd_pcm_lib_ioctl, |
136 | .hw_params = mmp_pcm_hw_params, | |
137 | .trigger = snd_dmaengine_pcm_trigger, | |
138 | .pointer = snd_dmaengine_pcm_pointer, | |
139 | .mmap = mmp_pcm_mmap, | |
140 | }; | |
141 | ||
142 | static void mmp_pcm_free_dma_buffers(struct snd_pcm *pcm) | |
143 | { | |
144 | struct snd_pcm_substream *substream; | |
145 | struct snd_dma_buffer *buf; | |
146 | int stream; | |
147 | struct gen_pool *gpool; | |
148 | ||
149 | gpool = sram_get_gpool("asram"); | |
150 | if (!gpool) | |
151 | return; | |
152 | ||
153 | for (stream = 0; stream < 2; stream++) { | |
154 | size_t size = mmp_pcm_hardware[stream].buffer_bytes_max; | |
155 | ||
156 | substream = pcm->streams[stream].substream; | |
157 | if (!substream) | |
158 | continue; | |
159 | ||
160 | buf = &substream->dma_buffer; | |
161 | if (!buf->area) | |
162 | continue; | |
163 | gen_pool_free(gpool, (unsigned long)buf->area, size); | |
164 | buf->area = NULL; | |
165 | } | |
166 | ||
7a824e21 ZG |
167 | } |
168 | ||
169 | static int mmp_pcm_preallocate_dma_buffer(struct snd_pcm_substream *substream, | |
170 | int stream) | |
171 | { | |
172 | struct snd_dma_buffer *buf = &substream->dma_buffer; | |
173 | size_t size = mmp_pcm_hardware[stream].buffer_bytes_max; | |
174 | struct gen_pool *gpool; | |
175 | ||
176 | buf->dev.type = SNDRV_DMA_TYPE_DEV; | |
177 | buf->dev.dev = substream->pcm->card->dev; | |
178 | buf->private_data = NULL; | |
179 | ||
180 | gpool = sram_get_gpool("asram"); | |
181 | if (!gpool) | |
182 | return -ENOMEM; | |
183 | ||
92a2e1cb | 184 | buf->area = gen_pool_dma_alloc(gpool, size, &buf->addr); |
7a824e21 ZG |
185 | if (!buf->area) |
186 | return -ENOMEM; | |
7a824e21 ZG |
187 | buf->bytes = size; |
188 | return 0; | |
189 | } | |
190 | ||
60e10d2f | 191 | static int mmp_pcm_new(struct snd_soc_pcm_runtime *rtd) |
7a824e21 ZG |
192 | { |
193 | struct snd_pcm_substream *substream; | |
194 | struct snd_pcm *pcm = rtd->pcm; | |
195 | int ret = 0, stream; | |
196 | ||
197 | for (stream = 0; stream < 2; stream++) { | |
198 | substream = pcm->streams[stream].substream; | |
199 | ||
200 | ret = mmp_pcm_preallocate_dma_buffer(substream, stream); | |
201 | if (ret) | |
202 | goto err; | |
203 | } | |
204 | ||
205 | return 0; | |
206 | ||
207 | err: | |
208 | mmp_pcm_free_dma_buffers(pcm); | |
209 | return ret; | |
210 | } | |
211 | ||
797d1697 KM |
212 | static const struct snd_soc_component_driver mmp_soc_component = { |
213 | .name = DRV_NAME, | |
7a824e21 ZG |
214 | .ops = &mmp_pcm_ops, |
215 | .pcm_new = mmp_pcm_new, | |
216 | .pcm_free = mmp_pcm_free_dma_buffers, | |
217 | }; | |
218 | ||
570f6fe1 | 219 | static int mmp_pcm_probe(struct platform_device *pdev) |
7a824e21 ZG |
220 | { |
221 | struct mmp_audio_platdata *pdata = pdev->dev.platform_data; | |
222 | ||
223 | if (pdata) { | |
224 | mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].buffer_bytes_max = | |
225 | pdata->buffer_max_playback; | |
226 | mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].period_bytes_max = | |
227 | pdata->period_max_playback; | |
228 | mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].buffer_bytes_max = | |
229 | pdata->buffer_max_capture; | |
230 | mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].period_bytes_max = | |
231 | pdata->period_max_capture; | |
232 | } | |
797d1697 KM |
233 | return devm_snd_soc_register_component(&pdev->dev, &mmp_soc_component, |
234 | NULL, 0); | |
7a824e21 ZG |
235 | } |
236 | ||
237 | static struct platform_driver mmp_pcm_driver = { | |
238 | .driver = { | |
239 | .name = "mmp-pcm-audio", | |
7a824e21 ZG |
240 | }, |
241 | ||
242 | .probe = mmp_pcm_probe, | |
7a824e21 ZG |
243 | }; |
244 | ||
245 | module_platform_driver(mmp_pcm_driver); | |
246 | ||
247 | MODULE_AUTHOR("Leo Yan <leoy@marvell.com>"); | |
248 | MODULE_DESCRIPTION("MMP Soc Audio DMA module"); | |
249 | MODULE_LICENSE("GPL"); | |
e5b7d71a | 250 | MODULE_ALIAS("platform:mmp-pcm-audio"); |