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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 | ||
540e59c6 KM |
58 | static int mmp_pcm_hw_params(struct snd_soc_component *component, |
59 | struct snd_pcm_substream *substream, | |
60 | struct snd_pcm_hw_params *params) | |
7a824e21 ZG |
61 | { |
62 | struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream); | |
7a824e21 ZG |
63 | struct dma_slave_config slave_config; |
64 | int ret; | |
65 | ||
48b752ac QZ |
66 | ret = |
67 | snd_dmaengine_pcm_prepare_slave_config(substream, params, | |
68 | &slave_config); | |
7a824e21 ZG |
69 | if (ret) |
70 | return ret; | |
71 | ||
7a824e21 ZG |
72 | ret = dmaengine_slave_config(chan, &slave_config); |
73 | if (ret) | |
74 | return ret; | |
75 | ||
76 | snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); | |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
540e59c6 KM |
81 | static int mmp_pcm_trigger(struct snd_soc_component *component, |
82 | struct snd_pcm_substream *substream, int cmd) | |
83 | { | |
84 | return snd_dmaengine_pcm_trigger(substream, cmd); | |
85 | } | |
86 | ||
87 | static snd_pcm_uframes_t mmp_pcm_pointer(struct snd_soc_component *component, | |
88 | struct snd_pcm_substream *substream) | |
89 | { | |
90 | return snd_dmaengine_pcm_pointer(substream); | |
91 | } | |
92 | ||
7a824e21 ZG |
93 | static bool filter(struct dma_chan *chan, void *param) |
94 | { | |
95 | struct mmp_dma_data *dma_data = param; | |
96 | bool found = false; | |
97 | char *devname; | |
98 | ||
99 | devname = kasprintf(GFP_KERNEL, "%s.%d", dma_data->dma_res->name, | |
100 | dma_data->ssp_id); | |
101 | if ((strcmp(dev_name(chan->device->dev), devname) == 0) && | |
102 | (chan->chan_id == dma_data->dma_res->start)) { | |
103 | found = true; | |
104 | } | |
105 | ||
106 | kfree(devname); | |
107 | return found; | |
108 | } | |
109 | ||
540e59c6 KM |
110 | static int mmp_pcm_open(struct snd_soc_component *component, |
111 | struct snd_pcm_substream *substream) | |
7a824e21 ZG |
112 | { |
113 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
797d1697 | 114 | struct platform_device *pdev = to_platform_device(component->dev); |
8d8fef28 | 115 | struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); |
ac581e60 | 116 | struct mmp_dma_data dma_data; |
7a824e21 | 117 | struct resource *r; |
7a824e21 ZG |
118 | |
119 | r = platform_get_resource(pdev, IORESOURCE_DMA, substream->stream); | |
120 | if (!r) | |
121 | return -EBUSY; | |
122 | ||
123 | snd_soc_set_runtime_hwparams(substream, | |
124 | &mmp_pcm_hardware[substream->stream]); | |
7a824e21 | 125 | |
ac581e60 LPC |
126 | dma_data.dma_res = r; |
127 | dma_data.ssp_id = cpu_dai->id; | |
7a824e21 | 128 | |
7c1c1d4a LPC |
129 | return snd_dmaengine_pcm_open_request_chan(substream, filter, |
130 | &dma_data); | |
7a824e21 ZG |
131 | } |
132 | ||
540e59c6 KM |
133 | static int mmp_pcm_close(struct snd_soc_component *component, |
134 | struct snd_pcm_substream *substream) | |
135 | { | |
136 | return snd_dmaengine_pcm_close_release_chan(substream); | |
137 | } | |
138 | ||
139 | static int mmp_pcm_mmap(struct snd_soc_component *component, | |
140 | struct snd_pcm_substream *substream, | |
141 | struct vm_area_struct *vma) | |
7a824e21 ZG |
142 | { |
143 | struct snd_pcm_runtime *runtime = substream->runtime; | |
144 | unsigned long off = vma->vm_pgoff; | |
145 | ||
146 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
147 | return remap_pfn_range(vma, vma->vm_start, | |
148 | __phys_to_pfn(runtime->dma_addr) + off, | |
149 | vma->vm_end - vma->vm_start, vma->vm_page_prot); | |
150 | } | |
151 | ||
540e59c6 KM |
152 | static void mmp_pcm_free_dma_buffers(struct snd_soc_component *component, |
153 | struct snd_pcm *pcm) | |
7a824e21 ZG |
154 | { |
155 | struct snd_pcm_substream *substream; | |
156 | struct snd_dma_buffer *buf; | |
157 | int stream; | |
158 | struct gen_pool *gpool; | |
159 | ||
160 | gpool = sram_get_gpool("asram"); | |
161 | if (!gpool) | |
162 | return; | |
163 | ||
164 | for (stream = 0; stream < 2; stream++) { | |
165 | size_t size = mmp_pcm_hardware[stream].buffer_bytes_max; | |
166 | ||
167 | substream = pcm->streams[stream].substream; | |
168 | if (!substream) | |
169 | continue; | |
170 | ||
171 | buf = &substream->dma_buffer; | |
172 | if (!buf->area) | |
173 | continue; | |
174 | gen_pool_free(gpool, (unsigned long)buf->area, size); | |
175 | buf->area = NULL; | |
176 | } | |
177 | ||
7a824e21 ZG |
178 | } |
179 | ||
180 | static int mmp_pcm_preallocate_dma_buffer(struct snd_pcm_substream *substream, | |
181 | int stream) | |
182 | { | |
183 | struct snd_dma_buffer *buf = &substream->dma_buffer; | |
184 | size_t size = mmp_pcm_hardware[stream].buffer_bytes_max; | |
185 | struct gen_pool *gpool; | |
186 | ||
187 | buf->dev.type = SNDRV_DMA_TYPE_DEV; | |
188 | buf->dev.dev = substream->pcm->card->dev; | |
189 | buf->private_data = NULL; | |
190 | ||
191 | gpool = sram_get_gpool("asram"); | |
192 | if (!gpool) | |
193 | return -ENOMEM; | |
194 | ||
92a2e1cb | 195 | buf->area = gen_pool_dma_alloc(gpool, size, &buf->addr); |
7a824e21 ZG |
196 | if (!buf->area) |
197 | return -ENOMEM; | |
7a824e21 ZG |
198 | buf->bytes = size; |
199 | return 0; | |
200 | } | |
201 | ||
540e59c6 KM |
202 | static int mmp_pcm_new(struct snd_soc_component *component, |
203 | struct snd_soc_pcm_runtime *rtd) | |
7a824e21 ZG |
204 | { |
205 | struct snd_pcm_substream *substream; | |
206 | struct snd_pcm *pcm = rtd->pcm; | |
207 | int ret = 0, stream; | |
208 | ||
209 | for (stream = 0; stream < 2; stream++) { | |
210 | substream = pcm->streams[stream].substream; | |
211 | ||
212 | ret = mmp_pcm_preallocate_dma_buffer(substream, stream); | |
213 | if (ret) | |
214 | goto err; | |
215 | } | |
216 | ||
217 | return 0; | |
218 | ||
219 | err: | |
540e59c6 | 220 | mmp_pcm_free_dma_buffers(component, pcm); |
7a824e21 ZG |
221 | return ret; |
222 | } | |
223 | ||
797d1697 KM |
224 | static const struct snd_soc_component_driver mmp_soc_component = { |
225 | .name = DRV_NAME, | |
540e59c6 KM |
226 | .open = mmp_pcm_open, |
227 | .close = mmp_pcm_close, | |
540e59c6 KM |
228 | .hw_params = mmp_pcm_hw_params, |
229 | .trigger = mmp_pcm_trigger, | |
230 | .pointer = mmp_pcm_pointer, | |
231 | .mmap = mmp_pcm_mmap, | |
232 | .pcm_construct = mmp_pcm_new, | |
233 | .pcm_destruct = mmp_pcm_free_dma_buffers, | |
7a824e21 ZG |
234 | }; |
235 | ||
570f6fe1 | 236 | static int mmp_pcm_probe(struct platform_device *pdev) |
7a824e21 ZG |
237 | { |
238 | struct mmp_audio_platdata *pdata = pdev->dev.platform_data; | |
239 | ||
240 | if (pdata) { | |
241 | mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].buffer_bytes_max = | |
242 | pdata->buffer_max_playback; | |
243 | mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].period_bytes_max = | |
244 | pdata->period_max_playback; | |
245 | mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].buffer_bytes_max = | |
246 | pdata->buffer_max_capture; | |
247 | mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].period_bytes_max = | |
248 | pdata->period_max_capture; | |
249 | } | |
797d1697 KM |
250 | return devm_snd_soc_register_component(&pdev->dev, &mmp_soc_component, |
251 | NULL, 0); | |
7a824e21 ZG |
252 | } |
253 | ||
254 | static struct platform_driver mmp_pcm_driver = { | |
255 | .driver = { | |
256 | .name = "mmp-pcm-audio", | |
7a824e21 ZG |
257 | }, |
258 | ||
259 | .probe = mmp_pcm_probe, | |
7a824e21 ZG |
260 | }; |
261 | ||
262 | module_platform_driver(mmp_pcm_driver); | |
263 | ||
264 | MODULE_AUTHOR("Leo Yan <leoy@marvell.com>"); | |
265 | MODULE_DESCRIPTION("MMP Soc Audio DMA module"); | |
266 | MODULE_LICENSE("GPL"); | |
e5b7d71a | 267 | MODULE_ALIAS("platform:mmp-pcm-audio"); |