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[~shefty/rdma-dev.git] / sound / soc / ux500 / ux500_pcm.c
1 /*
2  * Copyright (C) ST-Ericsson SA 2012
3  *
4  * Author: Ola Lilja <ola.o.lilja@stericsson.com>,
5  *         Roger Nilsson <roger.xr.nilsson@stericsson.com>
6  *         for ST-Ericsson.
7  *
8  * License terms:
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as published
12  * by the Free Software Foundation.
13  */
14
15 #include <asm/page.h>
16
17 #include <linux/module.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/dmaengine.h>
20 #include <linux/slab.h>
21
22 #include <plat/ste_dma40.h>
23
24 #include <sound/pcm.h>
25 #include <sound/pcm_params.h>
26 #include <sound/soc.h>
27 #include <sound/dmaengine_pcm.h>
28
29 #include "ux500_msp_i2s.h"
30 #include "ux500_pcm.h"
31
32 static struct snd_pcm_hardware ux500_pcm_hw_playback = {
33         .info = SNDRV_PCM_INFO_INTERLEAVED |
34                 SNDRV_PCM_INFO_MMAP |
35                 SNDRV_PCM_INFO_RESUME |
36                 SNDRV_PCM_INFO_PAUSE,
37         .formats = SNDRV_PCM_FMTBIT_S16_LE |
38                 SNDRV_PCM_FMTBIT_U16_LE |
39                 SNDRV_PCM_FMTBIT_S16_BE |
40                 SNDRV_PCM_FMTBIT_U16_BE,
41         .rates = SNDRV_PCM_RATE_KNOT,
42         .rate_min = UX500_PLATFORM_MIN_RATE_PLAYBACK,
43         .rate_max = UX500_PLATFORM_MAX_RATE_PLAYBACK,
44         .channels_min = UX500_PLATFORM_MIN_CHANNELS,
45         .channels_max = UX500_PLATFORM_MAX_CHANNELS,
46         .buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX,
47         .period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN,
48         .period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX,
49         .periods_min = UX500_PLATFORM_PERIODS_MIN,
50         .periods_max = UX500_PLATFORM_PERIODS_MAX,
51 };
52
53 static struct snd_pcm_hardware ux500_pcm_hw_capture = {
54         .info = SNDRV_PCM_INFO_INTERLEAVED |
55                 SNDRV_PCM_INFO_MMAP |
56                 SNDRV_PCM_INFO_RESUME |
57                 SNDRV_PCM_INFO_PAUSE,
58         .formats = SNDRV_PCM_FMTBIT_S16_LE |
59                 SNDRV_PCM_FMTBIT_U16_LE |
60                 SNDRV_PCM_FMTBIT_S16_BE |
61                 SNDRV_PCM_FMTBIT_U16_BE,
62         .rates = SNDRV_PCM_RATE_KNOT,
63         .rate_min = UX500_PLATFORM_MIN_RATE_CAPTURE,
64         .rate_max = UX500_PLATFORM_MAX_RATE_CAPTURE,
65         .channels_min = UX500_PLATFORM_MIN_CHANNELS,
66         .channels_max = UX500_PLATFORM_MAX_CHANNELS,
67         .buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX,
68         .period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN,
69         .period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX,
70         .periods_min = UX500_PLATFORM_PERIODS_MIN,
71         .periods_max = UX500_PLATFORM_PERIODS_MAX,
72 };
73
74 static void ux500_pcm_dma_hw_free(struct device *dev,
75                                 struct snd_pcm_substream *substream)
76 {
77         struct snd_pcm_runtime *runtime = substream->runtime;
78         struct snd_dma_buffer *buf = runtime->dma_buffer_p;
79
80         if (runtime->dma_area == NULL)
81                 return;
82
83         if (buf != &substream->dma_buffer) {
84                 dma_free_coherent(buf->dev.dev, buf->bytes, buf->area,
85                                 buf->addr);
86                 kfree(runtime->dma_buffer_p);
87         }
88
89         snd_pcm_set_runtime_buffer(substream, NULL);
90 }
91
92 static int ux500_pcm_open(struct snd_pcm_substream *substream)
93 {
94         int stream_id = substream->pstr->stream;
95         struct snd_pcm_runtime *runtime = substream->runtime;
96         struct snd_soc_pcm_runtime *rtd = substream->private_data;
97         struct snd_soc_dai *dai = rtd->cpu_dai;
98         struct device *dev = dai->dev;
99         int ret;
100         struct ux500_msp_dma_params *dma_params;
101         u16 per_data_width, mem_data_width;
102         struct stedma40_chan_cfg *dma_cfg;
103
104         dev_dbg(dev, "%s: MSP %d (%s): Enter.\n", __func__, dai->id,
105                 snd_pcm_stream_str(substream));
106
107         dev_dbg(dev, "%s: Set runtime hwparams.\n", __func__);
108         if (stream_id == SNDRV_PCM_STREAM_PLAYBACK)
109                 snd_soc_set_runtime_hwparams(substream,
110                                         &ux500_pcm_hw_playback);
111         else
112                 snd_soc_set_runtime_hwparams(substream,
113                                         &ux500_pcm_hw_capture);
114
115         /* ensure that buffer size is a multiple of period size */
116         ret = snd_pcm_hw_constraint_integer(runtime,
117                                         SNDRV_PCM_HW_PARAM_PERIODS);
118         if (ret < 0) {
119                 dev_err(dev, "%s: Error: snd_pcm_hw_constraints failed (%d)\n",
120                         __func__, ret);
121                 return ret;
122         }
123
124         dev_dbg(dev, "%s: Set hw-struct for %s.\n", __func__,
125                 snd_pcm_stream_str(substream));
126         runtime->hw = (stream_id == SNDRV_PCM_STREAM_PLAYBACK) ?
127                 ux500_pcm_hw_playback : ux500_pcm_hw_capture;
128
129         mem_data_width = STEDMA40_HALFWORD_WIDTH;
130
131         dma_params = snd_soc_dai_get_dma_data(dai, substream);
132         switch (dma_params->data_size) {
133         case 32:
134                 per_data_width = STEDMA40_WORD_WIDTH;
135                 break;
136         case 16:
137                 per_data_width = STEDMA40_HALFWORD_WIDTH;
138                 break;
139         case 8:
140                 per_data_width = STEDMA40_BYTE_WIDTH;
141                 break;
142         default:
143                 per_data_width = STEDMA40_WORD_WIDTH;
144                 dev_warn(rtd->platform->dev,
145                         "%s: Unknown data-size (%d)! Assuming 32 bits.\n",
146                         __func__, dma_params->data_size);
147         }
148
149         dma_cfg = dma_params->dma_cfg;
150
151         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
152                 dma_cfg->src_info.data_width = mem_data_width;
153                 dma_cfg->dst_info.data_width = per_data_width;
154         } else {
155                 dma_cfg->src_info.data_width = per_data_width;
156                 dma_cfg->dst_info.data_width = mem_data_width;
157         }
158
159
160         ret = snd_dmaengine_pcm_open(substream, stedma40_filter, dma_cfg);
161         if (ret) {
162                 dev_dbg(dai->dev,
163                         "%s: ERROR: snd_dmaengine_pcm_open failed (%d)!\n",
164                         __func__, ret);
165                 return ret;
166         }
167
168         snd_dmaengine_pcm_set_data(substream, dma_cfg);
169
170         return 0;
171 }
172
173 static int ux500_pcm_close(struct snd_pcm_substream *substream)
174 {
175         struct snd_soc_pcm_runtime *rtd = substream->private_data;
176         struct snd_soc_dai *dai = rtd->cpu_dai;
177
178         dev_dbg(dai->dev, "%s: Enter\n", __func__);
179
180         snd_dmaengine_pcm_close(substream);
181
182         return 0;
183 }
184
185 static int ux500_pcm_hw_params(struct snd_pcm_substream *substream,
186                         struct snd_pcm_hw_params *hw_params)
187 {
188         struct snd_pcm_runtime *runtime = substream->runtime;
189         struct snd_dma_buffer *buf = runtime->dma_buffer_p;
190         struct snd_soc_pcm_runtime *rtd = substream->private_data;
191         int ret = 0;
192         int size;
193
194         dev_dbg(rtd->platform->dev, "%s: Enter\n", __func__);
195
196         size = params_buffer_bytes(hw_params);
197
198         if (buf) {
199                 if (buf->bytes >= size)
200                         goto out;
201                 ux500_pcm_dma_hw_free(NULL, substream);
202         }
203
204         if (substream->dma_buffer.area != NULL &&
205                 substream->dma_buffer.bytes >= size) {
206                 buf = &substream->dma_buffer;
207         } else {
208                 buf = kmalloc(sizeof(struct snd_dma_buffer), GFP_KERNEL);
209                 if (!buf)
210                         goto nomem;
211
212                 buf->dev.type = SNDRV_DMA_TYPE_DEV;
213                 buf->dev.dev = NULL;
214                 buf->area = dma_alloc_coherent(NULL, size, &buf->addr,
215                                         GFP_KERNEL);
216                 buf->bytes = size;
217                 buf->private_data = NULL;
218
219                 if (!buf->area)
220                         goto free;
221         }
222         snd_pcm_set_runtime_buffer(substream, buf);
223         ret = 1;
224  out:
225         runtime->dma_bytes = size;
226         return ret;
227
228  free:
229         kfree(buf);
230  nomem:
231         return -ENOMEM;
232 }
233
234 static int ux500_pcm_hw_free(struct snd_pcm_substream *substream)
235 {
236         struct snd_soc_pcm_runtime *rtd = substream->private_data;
237
238         dev_dbg(rtd->platform->dev, "%s: Enter\n", __func__);
239
240         ux500_pcm_dma_hw_free(NULL, substream);
241
242         return 0;
243 }
244
245 static int ux500_pcm_mmap(struct snd_pcm_substream *substream,
246                         struct vm_area_struct *vma)
247 {
248         struct snd_pcm_runtime *runtime = substream->runtime;
249         struct snd_soc_pcm_runtime *rtd = substream->private_data;
250
251         dev_dbg(rtd->platform->dev, "%s: Enter.\n", __func__);
252
253         return dma_mmap_coherent(NULL, vma, runtime->dma_area,
254                                 runtime->dma_addr, runtime->dma_bytes);
255 }
256
257 static struct snd_pcm_ops ux500_pcm_ops = {
258         .open           = ux500_pcm_open,
259         .close          = ux500_pcm_close,
260         .ioctl          = snd_pcm_lib_ioctl,
261         .hw_params      = ux500_pcm_hw_params,
262         .hw_free        = ux500_pcm_hw_free,
263         .trigger        = snd_dmaengine_pcm_trigger,
264         .pointer        = snd_dmaengine_pcm_pointer_no_residue,
265         .mmap           = ux500_pcm_mmap
266 };
267
268 int ux500_pcm_new(struct snd_soc_pcm_runtime *rtd)
269 {
270         struct snd_pcm *pcm = rtd->pcm;
271
272         dev_dbg(rtd->platform->dev, "%s: Enter (id = '%s').\n", __func__,
273                 pcm->id);
274
275         pcm->info_flags = 0;
276
277         return 0;
278 }
279
280 static struct snd_soc_platform_driver ux500_pcm_soc_drv = {
281         .ops            = &ux500_pcm_ops,
282         .pcm_new        = ux500_pcm_new,
283 };
284
285 int __devinit ux500_pcm_register_platform(struct platform_device *pdev)
286 {
287         int ret;
288
289         ret = snd_soc_register_platform(&pdev->dev, &ux500_pcm_soc_drv);
290         if (ret < 0) {
291                 dev_err(&pdev->dev,
292                         "%s: ERROR: Failed to register platform '%s' (%d)!\n",
293                         __func__, pdev->name, ret);
294                 return ret;
295         }
296
297         return 0;
298 }
299 EXPORT_SYMBOL_GPL(ux500_pcm_register_platform);
300
301 int __devexit ux500_pcm_unregister_platform(struct platform_device *pdev)
302 {
303         snd_soc_unregister_platform(&pdev->dev);
304
305         return 0;
306 }
307 EXPORT_SYMBOL_GPL(ux500_pcm_unregister_platform);