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13#include <linux/types.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/init.h>
17#include <linux/kmod.h>
18#include <linux/mutex.h>
19#include <linux/pci.h>
20#include <linux/delay.h>
21
22#include <sound/core.h>
23#include <sound/initval.h>
24#include <sound/pcm.h>
25#include <sound/control.h>
26#include "tw686x.h"
27#include "tw686x-regs.h"
28
29#define AUDIO_CHANNEL_OFFSET 8
30
31void tw686x_audio_irq(struct tw686x_dev *dev, unsigned long requests,
32 unsigned int pb_status)
33{
34 unsigned long flags;
35 unsigned int ch, pb;
36
37 for_each_set_bit(ch, &requests, max_channels(dev)) {
38 struct tw686x_audio_channel *ac = &dev->audio_channels[ch];
39 struct tw686x_audio_buf *done = NULL;
40 struct tw686x_audio_buf *next = NULL;
41 struct tw686x_dma_desc *desc;
42
43 pb = !!(pb_status & BIT(AUDIO_CHANNEL_OFFSET + ch));
44
45 spin_lock_irqsave(&ac->lock, flags);
46
47
48 if (!ac->ss || !ac->curr_bufs[0] || !ac->curr_bufs[1]) {
49 spin_unlock_irqrestore(&ac->lock, flags);
50 continue;
51 }
52
53 if (!list_empty(&ac->buf_list)) {
54 next = list_first_entry(&ac->buf_list,
55 struct tw686x_audio_buf, list);
56 list_move_tail(&next->list, &ac->buf_list);
57 done = ac->curr_bufs[!pb];
58 ac->curr_bufs[pb] = next;
59 }
60 spin_unlock_irqrestore(&ac->lock, flags);
61
62 if (!done || !next)
63 continue;
64
65
66
67
68 desc = &ac->dma_descs[pb];
69 if (desc->virt) {
70 memcpy(done->virt, desc->virt,
71 dev->period_size);
72 } else {
73 u32 reg = pb ? ADMA_B_ADDR[ch] : ADMA_P_ADDR[ch];
74 reg_write(dev, reg, next->dma);
75 }
76 ac->ptr = done->dma - ac->buf[0].dma;
77 snd_pcm_period_elapsed(ac->ss);
78 }
79}
80
81
82
83
84
85
86static const struct snd_pcm_hardware tw686x_capture_hw = {
87 .info = (SNDRV_PCM_INFO_MMAP |
88 SNDRV_PCM_INFO_INTERLEAVED |
89 SNDRV_PCM_INFO_BLOCK_TRANSFER |
90 SNDRV_PCM_INFO_MMAP_VALID),
91 .formats = SNDRV_PCM_FMTBIT_S16_LE,
92 .rates = SNDRV_PCM_RATE_8000_48000,
93 .rate_min = 8000,
94 .rate_max = 48000,
95 .channels_min = 1,
96 .channels_max = 1,
97 .buffer_bytes_max = TW686X_AUDIO_PAGE_MAX * AUDIO_DMA_SIZE_MAX,
98 .period_bytes_min = AUDIO_DMA_SIZE_MIN,
99 .period_bytes_max = AUDIO_DMA_SIZE_MAX,
100 .periods_min = TW686X_AUDIO_PERIODS_MIN,
101 .periods_max = TW686X_AUDIO_PERIODS_MAX,
102};
103
104static int tw686x_pcm_open(struct snd_pcm_substream *ss)
105{
106 struct tw686x_dev *dev = snd_pcm_substream_chip(ss);
107 struct tw686x_audio_channel *ac = &dev->audio_channels[ss->number];
108 struct snd_pcm_runtime *rt = ss->runtime;
109 int err;
110
111 ac->ss = ss;
112 rt->hw = tw686x_capture_hw;
113
114 err = snd_pcm_hw_constraint_integer(rt, SNDRV_PCM_HW_PARAM_PERIODS);
115 if (err < 0)
116 return err;
117
118 return 0;
119}
120
121static int tw686x_pcm_close(struct snd_pcm_substream *ss)
122{
123 struct tw686x_dev *dev = snd_pcm_substream_chip(ss);
124 struct tw686x_audio_channel *ac = &dev->audio_channels[ss->number];
125
126 ac->ss = NULL;
127 return 0;
128}
129
130static int tw686x_pcm_prepare(struct snd_pcm_substream *ss)
131{
132 struct tw686x_dev *dev = snd_pcm_substream_chip(ss);
133 struct tw686x_audio_channel *ac = &dev->audio_channels[ss->number];
134 struct snd_pcm_runtime *rt = ss->runtime;
135 unsigned int period_size = snd_pcm_lib_period_bytes(ss);
136 struct tw686x_audio_buf *p_buf, *b_buf;
137 unsigned long flags;
138 int i;
139
140 spin_lock_irqsave(&dev->lock, flags);
141
142
143
144
145 if (((dev->audio_rate != rt->rate) ||
146 (dev->period_size != period_size)) && dev->audio_enabled)
147 goto err_audio_busy;
148
149 tw686x_disable_channel(dev, AUDIO_CHANNEL_OFFSET + ac->ch);
150 spin_unlock_irqrestore(&dev->lock, flags);
151
152 if (dev->audio_rate != rt->rate) {
153 u32 reg;
154
155 dev->audio_rate = rt->rate;
156 reg = ((125000000 / rt->rate) << 16) +
157 ((125000000 % rt->rate) << 16) / rt->rate;
158
159 reg_write(dev, AUDIO_CONTROL2, reg);
160 }
161
162 if (dev->period_size != period_size) {
163 u32 reg;
164
165 dev->period_size = period_size;
166 reg = reg_read(dev, AUDIO_CONTROL1);
167 reg &= ~(AUDIO_DMA_SIZE_MASK << AUDIO_DMA_SIZE_SHIFT);
168 reg |= period_size << AUDIO_DMA_SIZE_SHIFT;
169
170 reg_write(dev, AUDIO_CONTROL1, reg);
171 }
172
173 if (rt->periods < TW686X_AUDIO_PERIODS_MIN ||
174 rt->periods > TW686X_AUDIO_PERIODS_MAX)
175 return -EINVAL;
176
177 spin_lock_irqsave(&ac->lock, flags);
178 INIT_LIST_HEAD(&ac->buf_list);
179
180 for (i = 0; i < rt->periods; i++) {
181 ac->buf[i].dma = rt->dma_addr + period_size * i;
182 ac->buf[i].virt = rt->dma_area + period_size * i;
183 INIT_LIST_HEAD(&ac->buf[i].list);
184 list_add_tail(&ac->buf[i].list, &ac->buf_list);
185 }
186
187 p_buf = list_first_entry(&ac->buf_list, struct tw686x_audio_buf, list);
188 list_move_tail(&p_buf->list, &ac->buf_list);
189
190 b_buf = list_first_entry(&ac->buf_list, struct tw686x_audio_buf, list);
191 list_move_tail(&b_buf->list, &ac->buf_list);
192
193 ac->curr_bufs[0] = p_buf;
194 ac->curr_bufs[1] = b_buf;
195 ac->ptr = 0;
196
197 if (dev->dma_mode != TW686X_DMA_MODE_MEMCPY) {
198 reg_write(dev, ADMA_P_ADDR[ac->ch], p_buf->dma);
199 reg_write(dev, ADMA_B_ADDR[ac->ch], b_buf->dma);
200 }
201
202 spin_unlock_irqrestore(&ac->lock, flags);
203
204 return 0;
205
206err_audio_busy:
207 spin_unlock_irqrestore(&dev->lock, flags);
208 return -EBUSY;
209}
210
211static int tw686x_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
212{
213 struct tw686x_dev *dev = snd_pcm_substream_chip(ss);
214 struct tw686x_audio_channel *ac = &dev->audio_channels[ss->number];
215 unsigned long flags;
216 int err = 0;
217
218 switch (cmd) {
219 case SNDRV_PCM_TRIGGER_START:
220 if (ac->curr_bufs[0] && ac->curr_bufs[1]) {
221 spin_lock_irqsave(&dev->lock, flags);
222 dev->audio_enabled = 1;
223 tw686x_enable_channel(dev,
224 AUDIO_CHANNEL_OFFSET + ac->ch);
225 spin_unlock_irqrestore(&dev->lock, flags);
226
227 mod_timer(&dev->dma_delay_timer,
228 jiffies + msecs_to_jiffies(100));
229 } else {
230 err = -EIO;
231 }
232 break;
233 case SNDRV_PCM_TRIGGER_STOP:
234 spin_lock_irqsave(&dev->lock, flags);
235 dev->audio_enabled = 0;
236 tw686x_disable_channel(dev, AUDIO_CHANNEL_OFFSET + ac->ch);
237 spin_unlock_irqrestore(&dev->lock, flags);
238
239 spin_lock_irqsave(&ac->lock, flags);
240 ac->curr_bufs[0] = NULL;
241 ac->curr_bufs[1] = NULL;
242 spin_unlock_irqrestore(&ac->lock, flags);
243 break;
244 default:
245 err = -EINVAL;
246 }
247 return err;
248}
249
250static snd_pcm_uframes_t tw686x_pcm_pointer(struct snd_pcm_substream *ss)
251{
252 struct tw686x_dev *dev = snd_pcm_substream_chip(ss);
253 struct tw686x_audio_channel *ac = &dev->audio_channels[ss->number];
254
255 return bytes_to_frames(ss->runtime, ac->ptr);
256}
257
258static const struct snd_pcm_ops tw686x_pcm_ops = {
259 .open = tw686x_pcm_open,
260 .close = tw686x_pcm_close,
261 .prepare = tw686x_pcm_prepare,
262 .trigger = tw686x_pcm_trigger,
263 .pointer = tw686x_pcm_pointer,
264};
265
266static int tw686x_snd_pcm_init(struct tw686x_dev *dev)
267{
268 struct snd_card *card = dev->snd_card;
269 struct snd_pcm *pcm;
270 struct snd_pcm_substream *ss;
271 unsigned int i;
272 int err;
273
274 err = snd_pcm_new(card, card->driver, 0, 0, max_channels(dev), &pcm);
275 if (err < 0)
276 return err;
277
278 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &tw686x_pcm_ops);
279 snd_pcm_chip(pcm) = dev;
280 pcm->info_flags = 0;
281 strscpy(pcm->name, "tw686x PCM", sizeof(pcm->name));
282
283 for (i = 0, ss = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
284 ss; ss = ss->next, i++)
285 snprintf(ss->name, sizeof(ss->name), "vch%u audio", i);
286
287 snd_pcm_set_managed_buffer_all(pcm,
288 SNDRV_DMA_TYPE_DEV,
289 &dev->pci_dev->dev,
290 TW686X_AUDIO_PAGE_MAX * AUDIO_DMA_SIZE_MAX,
291 TW686X_AUDIO_PAGE_MAX * AUDIO_DMA_SIZE_MAX);
292 return 0;
293}
294
295static void tw686x_audio_dma_free(struct tw686x_dev *dev,
296 struct tw686x_audio_channel *ac)
297{
298 int pb;
299
300 for (pb = 0; pb < 2; pb++) {
301 if (!ac->dma_descs[pb].virt)
302 continue;
303 dma_free_coherent(&dev->pci_dev->dev, ac->dma_descs[pb].size,
304 ac->dma_descs[pb].virt,
305 ac->dma_descs[pb].phys);
306 ac->dma_descs[pb].virt = NULL;
307 }
308}
309
310static int tw686x_audio_dma_alloc(struct tw686x_dev *dev,
311 struct tw686x_audio_channel *ac)
312{
313 int pb;
314
315
316
317
318
319
320 if (dev->dma_mode != TW686X_DMA_MODE_MEMCPY)
321 return 0;
322
323 for (pb = 0; pb < 2; pb++) {
324 u32 reg = pb ? ADMA_B_ADDR[ac->ch] : ADMA_P_ADDR[ac->ch];
325 void *virt;
326
327 virt = dma_alloc_coherent(&dev->pci_dev->dev,
328 AUDIO_DMA_SIZE_MAX,
329 &ac->dma_descs[pb].phys, GFP_KERNEL);
330 if (!virt) {
331 dev_err(&dev->pci_dev->dev,
332 "dma%d: unable to allocate audio DMA %s-buffer\n",
333 ac->ch, pb ? "B" : "P");
334 return -ENOMEM;
335 }
336 ac->dma_descs[pb].virt = virt;
337 ac->dma_descs[pb].size = AUDIO_DMA_SIZE_MAX;
338 reg_write(dev, reg, ac->dma_descs[pb].phys);
339 }
340 return 0;
341}
342
343void tw686x_audio_free(struct tw686x_dev *dev)
344{
345 unsigned long flags;
346 u32 dma_ch_mask;
347 u32 dma_cmd;
348
349 spin_lock_irqsave(&dev->lock, flags);
350 dma_cmd = reg_read(dev, DMA_CMD);
351 dma_ch_mask = reg_read(dev, DMA_CHANNEL_ENABLE);
352 reg_write(dev, DMA_CMD, dma_cmd & ~0xff00);
353 reg_write(dev, DMA_CHANNEL_ENABLE, dma_ch_mask & ~0xff00);
354 spin_unlock_irqrestore(&dev->lock, flags);
355
356 if (!dev->snd_card)
357 return;
358 snd_card_free(dev->snd_card);
359 dev->snd_card = NULL;
360}
361
362int tw686x_audio_init(struct tw686x_dev *dev)
363{
364 struct pci_dev *pci_dev = dev->pci_dev;
365 struct snd_card *card;
366 int err, ch;
367
368
369 reg_write(dev, AUDIO_CONTROL1, BIT(0));
370
371 err = snd_card_new(&pci_dev->dev, SNDRV_DEFAULT_IDX1,
372 SNDRV_DEFAULT_STR1,
373 THIS_MODULE, 0, &card);
374 if (err < 0)
375 return err;
376
377 dev->snd_card = card;
378 strscpy(card->driver, "tw686x", sizeof(card->driver));
379 strscpy(card->shortname, "tw686x", sizeof(card->shortname));
380 strscpy(card->longname, pci_name(pci_dev), sizeof(card->longname));
381 snd_card_set_dev(card, &pci_dev->dev);
382
383 for (ch = 0; ch < max_channels(dev); ch++) {
384 struct tw686x_audio_channel *ac;
385
386 ac = &dev->audio_channels[ch];
387 spin_lock_init(&ac->lock);
388 ac->dev = dev;
389 ac->ch = ch;
390
391 err = tw686x_audio_dma_alloc(dev, ac);
392 if (err < 0)
393 goto err_cleanup;
394 }
395
396 err = tw686x_snd_pcm_init(dev);
397 if (err < 0)
398 goto err_cleanup;
399
400 err = snd_card_register(card);
401 if (!err)
402 return 0;
403
404err_cleanup:
405 for (ch = 0; ch < max_channels(dev); ch++) {
406 if (!dev->audio_channels[ch].dev)
407 continue;
408 tw686x_audio_dma_free(dev, &dev->audio_channels[ch]);
409 }
410 snd_card_free(card);
411 dev->snd_card = NULL;
412 return err;
413}
414
