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7#include <linux/bitfield.h>
8#include <linux/circ_buf.h>
9#include <linux/dma-mapping.h>
10#include <linux/errno.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <sound/core.h>
14#include <sound/pcm.h>
15#include <sound/soc.h>
16
17#include "aio.h"
18
19static int uniphier_aio_compr_prepare(struct snd_soc_component *component,
20 struct snd_compr_stream *cstream);
21static int uniphier_aio_compr_hw_free(struct snd_soc_component *component,
22 struct snd_compr_stream *cstream);
23
24static int uniphier_aio_comprdma_new(struct snd_soc_pcm_runtime *rtd)
25{
26 struct snd_compr *compr = rtd->compr;
27 struct device *dev = compr->card->dev;
28 struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
29 struct uniphier_aio_sub *sub = &aio->sub[compr->direction];
30 size_t size = AUD_RING_SIZE;
31 int dma_dir = DMA_FROM_DEVICE, ret;
32
33 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(33));
34 if (ret)
35 return ret;
36
37 sub->compr_area = kzalloc(size, GFP_KERNEL);
38 if (!sub->compr_area)
39 return -ENOMEM;
40
41 if (sub->swm->dir == PORT_DIR_OUTPUT)
42 dma_dir = DMA_TO_DEVICE;
43
44 sub->compr_addr = dma_map_single(dev, sub->compr_area, size, dma_dir);
45 if (dma_mapping_error(dev, sub->compr_addr)) {
46 kfree(sub->compr_area);
47 sub->compr_area = NULL;
48
49 return -ENOMEM;
50 }
51
52 sub->compr_bytes = size;
53
54 return 0;
55}
56
57static int uniphier_aio_comprdma_free(struct snd_soc_pcm_runtime *rtd)
58{
59 struct snd_compr *compr = rtd->compr;
60 struct device *dev = compr->card->dev;
61 struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
62 struct uniphier_aio_sub *sub = &aio->sub[compr->direction];
63 int dma_dir = DMA_FROM_DEVICE;
64
65 if (sub->swm->dir == PORT_DIR_OUTPUT)
66 dma_dir = DMA_TO_DEVICE;
67
68 dma_unmap_single(dev, sub->compr_addr, sub->compr_bytes, dma_dir);
69 kfree(sub->compr_area);
70 sub->compr_area = NULL;
71
72 return 0;
73}
74
75static int uniphier_aio_compr_open(struct snd_soc_component *component,
76 struct snd_compr_stream *cstream)
77{
78 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
79 struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
80 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
81 int ret;
82
83 if (sub->cstream)
84 return -EBUSY;
85
86 sub->cstream = cstream;
87 sub->pass_through = 1;
88 sub->use_mmap = false;
89
90 ret = uniphier_aio_comprdma_new(rtd);
91 if (ret)
92 return ret;
93
94 ret = aio_init(sub);
95 if (ret)
96 return ret;
97
98 return 0;
99}
100
101static int uniphier_aio_compr_free(struct snd_soc_component *component,
102 struct snd_compr_stream *cstream)
103{
104 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
105 struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
106 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
107 int ret;
108
109 ret = uniphier_aio_compr_hw_free(component, cstream);
110 if (ret)
111 return ret;
112 ret = uniphier_aio_comprdma_free(rtd);
113 if (ret)
114 return ret;
115
116 sub->cstream = NULL;
117
118 return 0;
119}
120
121static int uniphier_aio_compr_get_params(struct snd_soc_component *component,
122 struct snd_compr_stream *cstream,
123 struct snd_codec *params)
124{
125 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
126 struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
127 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
128
129 *params = sub->cparams.codec;
130
131 return 0;
132}
133
134static int uniphier_aio_compr_set_params(struct snd_soc_component *component,
135 struct snd_compr_stream *cstream,
136 struct snd_compr_params *params)
137{
138 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
139 struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
140 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
141 struct device *dev = &aio->chip->pdev->dev;
142
143 if (params->codec.id != SND_AUDIOCODEC_IEC61937) {
144 dev_err(dev, "Codec ID is not supported(%d)\n",
145 params->codec.id);
146 return -EINVAL;
147 }
148 if (params->codec.profile != SND_AUDIOPROFILE_IEC61937_SPDIF) {
149 dev_err(dev, "Codec profile is not supported(%d)\n",
150 params->codec.profile);
151 return -EINVAL;
152 }
153
154
155 sub->iec_pc = IEC61937_PC_AAC;
156
157 sub->cparams = *params;
158 sub->setting = 1;
159
160 aio_port_reset(sub);
161 aio_src_reset(sub);
162
163 return uniphier_aio_compr_prepare(component, cstream);
164}
165
166static int uniphier_aio_compr_hw_free(struct snd_soc_component *component,
167 struct snd_compr_stream *cstream)
168{
169 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
170 struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
171 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
172
173 sub->setting = 0;
174
175 return 0;
176}
177
178static int uniphier_aio_compr_prepare(struct snd_soc_component *component,
179 struct snd_compr_stream *cstream)
180{
181 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
182 struct snd_compr_runtime *runtime = cstream->runtime;
183 struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
184 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
185 int bytes = runtime->fragment_size;
186 unsigned long flags;
187 int ret;
188
189 ret = aiodma_ch_set_param(sub);
190 if (ret)
191 return ret;
192
193 spin_lock_irqsave(&sub->lock, flags);
194 ret = aiodma_rb_set_buffer(sub, sub->compr_addr,
195 sub->compr_addr + sub->compr_bytes,
196 bytes);
197 spin_unlock_irqrestore(&sub->lock, flags);
198 if (ret)
199 return ret;
200
201 ret = aio_port_set_param(sub, sub->pass_through, &sub->params);
202 if (ret)
203 return ret;
204 ret = aio_oport_set_stream_type(sub, sub->iec_pc);
205 if (ret)
206 return ret;
207 aio_port_set_enable(sub, 1);
208
209 ret = aio_if_set_param(sub, sub->pass_through);
210 if (ret)
211 return ret;
212
213 return 0;
214}
215
216static int uniphier_aio_compr_trigger(struct snd_soc_component *component,
217 struct snd_compr_stream *cstream,
218 int cmd)
219{
220 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
221 struct snd_compr_runtime *runtime = cstream->runtime;
222 struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
223 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
224 struct device *dev = &aio->chip->pdev->dev;
225 int bytes = runtime->fragment_size, ret = 0;
226 unsigned long flags;
227
228 spin_lock_irqsave(&sub->lock, flags);
229 switch (cmd) {
230 case SNDRV_PCM_TRIGGER_START:
231 aiodma_rb_sync(sub, sub->compr_addr, sub->compr_bytes, bytes);
232 aiodma_ch_set_enable(sub, 1);
233 sub->running = 1;
234
235 break;
236 case SNDRV_PCM_TRIGGER_STOP:
237 sub->running = 0;
238 aiodma_ch_set_enable(sub, 0);
239
240 break;
241 default:
242 dev_warn(dev, "Unknown trigger(%d)\n", cmd);
243 ret = -EINVAL;
244 }
245 spin_unlock_irqrestore(&sub->lock, flags);
246
247 return ret;
248}
249
250static int uniphier_aio_compr_pointer(struct snd_soc_component *component,
251 struct snd_compr_stream *cstream,
252 struct snd_compr_tstamp *tstamp)
253{
254 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
255 struct snd_compr_runtime *runtime = cstream->runtime;
256 struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
257 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
258 int bytes = runtime->fragment_size;
259 unsigned long flags;
260 u32 pos;
261
262 spin_lock_irqsave(&sub->lock, flags);
263
264 aiodma_rb_sync(sub, sub->compr_addr, sub->compr_bytes, bytes);
265
266 if (sub->swm->dir == PORT_DIR_OUTPUT) {
267 pos = sub->rd_offs;
268
269 tstamp->copied_total = sub->rd_total / 2;
270 } else {
271 pos = sub->wr_offs;
272 tstamp->copied_total = sub->rd_total;
273 }
274 tstamp->byte_offset = pos;
275
276 spin_unlock_irqrestore(&sub->lock, flags);
277
278 return 0;
279}
280
281static int aio_compr_send_to_hw(struct uniphier_aio_sub *sub,
282 char __user *buf, size_t dstsize)
283{
284 u32 __user *srcbuf = (u32 __user *)buf;
285 u32 *dstbuf = (u32 *)(sub->compr_area + sub->wr_offs);
286 int src = 0, dst = 0, ret;
287 u32 frm, frm_a, frm_b;
288
289 while (dstsize > 0) {
290 ret = get_user(frm, srcbuf + src);
291 if (ret)
292 return ret;
293 src++;
294
295 frm_a = frm & 0xffff;
296 frm_b = (frm >> 16) & 0xffff;
297
298 if (frm == IEC61937_HEADER_SIGN) {
299 frm_a |= 0x01000000;
300
301
302 sub->iec_header = true;
303 } else {
304 u16 pc = be16_to_cpu((__be16)frm_a);
305
306 if (sub->iec_header && sub->iec_pc != pc) {
307
308 sub->iec_pc = pc;
309 ret = aio_oport_set_stream_type(sub, pc);
310 if (ret)
311 return ret;
312 }
313 sub->iec_header = false;
314 }
315 dstbuf[dst++] = frm_a;
316 dstbuf[dst++] = frm_b;
317
318 dstsize -= sizeof(u32) * 2;
319 }
320
321 return 0;
322}
323
324static int uniphier_aio_compr_copy(struct snd_soc_component *component,
325 struct snd_compr_stream *cstream,
326 char __user *buf, size_t count)
327{
328 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
329 struct snd_compr_runtime *runtime = cstream->runtime;
330 struct device *carddev = rtd->compr->card->dev;
331 struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
332 struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
333 size_t cnt = min_t(size_t, count, aio_rb_space_to_end(sub) / 2);
334 int bytes = runtime->fragment_size;
335 unsigned long flags;
336 size_t s;
337 int ret;
338
339 if (cnt < sizeof(u32))
340 return 0;
341
342 if (sub->swm->dir == PORT_DIR_OUTPUT) {
343 dma_addr_t dmapos = sub->compr_addr + sub->wr_offs;
344
345
346 s = cnt * 2;
347
348 dma_sync_single_for_cpu(carddev, dmapos, s, DMA_TO_DEVICE);
349 ret = aio_compr_send_to_hw(sub, buf, s);
350 dma_sync_single_for_device(carddev, dmapos, s, DMA_TO_DEVICE);
351 } else {
352 dma_addr_t dmapos = sub->compr_addr + sub->rd_offs;
353
354 s = cnt;
355
356 dma_sync_single_for_cpu(carddev, dmapos, s, DMA_FROM_DEVICE);
357 ret = copy_to_user(buf, sub->compr_area + sub->rd_offs, s);
358 dma_sync_single_for_device(carddev, dmapos, s, DMA_FROM_DEVICE);
359 }
360 if (ret)
361 return -EFAULT;
362
363 spin_lock_irqsave(&sub->lock, flags);
364
365 sub->threshold = 2 * bytes;
366 aiodma_rb_set_threshold(sub, sub->compr_bytes, 2 * bytes);
367
368 if (sub->swm->dir == PORT_DIR_OUTPUT) {
369 sub->wr_offs += s;
370 if (sub->wr_offs >= sub->compr_bytes)
371 sub->wr_offs -= sub->compr_bytes;
372 } else {
373 sub->rd_offs += s;
374 if (sub->rd_offs >= sub->compr_bytes)
375 sub->rd_offs -= sub->compr_bytes;
376 }
377 aiodma_rb_sync(sub, sub->compr_addr, sub->compr_bytes, bytes);
378
379 spin_unlock_irqrestore(&sub->lock, flags);
380
381 return cnt;
382}
383
384static int uniphier_aio_compr_get_caps(struct snd_soc_component *component,
385 struct snd_compr_stream *cstream,
386 struct snd_compr_caps *caps)
387{
388 caps->num_codecs = 1;
389 caps->min_fragment_size = AUD_MIN_FRAGMENT_SIZE;
390 caps->max_fragment_size = AUD_MAX_FRAGMENT_SIZE;
391 caps->min_fragments = AUD_MIN_FRAGMENT;
392 caps->max_fragments = AUD_MAX_FRAGMENT;
393 caps->codecs[0] = SND_AUDIOCODEC_IEC61937;
394
395 return 0;
396}
397
398static const struct snd_compr_codec_caps caps_iec = {
399 .num_descriptors = 1,
400 .descriptor[0].max_ch = 8,
401 .descriptor[0].num_sample_rates = 0,
402 .descriptor[0].num_bitrates = 0,
403 .descriptor[0].profiles = SND_AUDIOPROFILE_IEC61937_SPDIF,
404 .descriptor[0].modes = SND_AUDIOMODE_IEC_AC3 |
405 SND_AUDIOMODE_IEC_MPEG1 |
406 SND_AUDIOMODE_IEC_MP3 |
407 SND_AUDIOMODE_IEC_DTS,
408 .descriptor[0].formats = 0,
409};
410
411static int uniphier_aio_compr_get_codec_caps(struct snd_soc_component *component,
412 struct snd_compr_stream *stream,
413 struct snd_compr_codec_caps *codec)
414{
415 if (codec->codec == SND_AUDIOCODEC_IEC61937)
416 *codec = caps_iec;
417 else
418 return -EINVAL;
419
420 return 0;
421}
422
423const struct snd_compress_ops uniphier_aio_compress_ops = {
424 .open = uniphier_aio_compr_open,
425 .free = uniphier_aio_compr_free,
426 .get_params = uniphier_aio_compr_get_params,
427 .set_params = uniphier_aio_compr_set_params,
428 .trigger = uniphier_aio_compr_trigger,
429 .pointer = uniphier_aio_compr_pointer,
430 .copy = uniphier_aio_compr_copy,
431 .get_caps = uniphier_aio_compr_get_caps,
432 .get_codec_caps = uniphier_aio_compr_get_codec_caps,
433};
434
