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16#include <linux/types.h>
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/kmod.h>
21#include <linux/mutex.h>
22#include <linux/pci.h>
23#include <linux/delay.h>
24
25#include <sound/core.h>
26#include <sound/initval.h>
27#include <sound/pcm.h>
28#include <sound/control.h>
29#include "tw686x.h"
30#include "tw686x-regs.h"
31
32#define AUDIO_CHANNEL_OFFSET 8
33
34void tw686x_audio_irq(struct tw686x_dev *dev, unsigned long requests,
35 unsigned int pb_status)
36{
37 unsigned long flags;
38 unsigned int ch, pb;
39
40 for_each_set_bit(ch, &requests, max_channels(dev)) {
41 struct tw686x_audio_channel *ac = &dev->audio_channels[ch];
42 struct tw686x_audio_buf *done = NULL;
43 struct tw686x_audio_buf *next = NULL;
44 struct tw686x_dma_desc *desc;
45
46 pb = !!(pb_status & BIT(AUDIO_CHANNEL_OFFSET + ch));
47
48 spin_lock_irqsave(&ac->lock, flags);
49
50
51 if (!ac->ss || !ac->curr_bufs[0] || !ac->curr_bufs[1]) {
52 spin_unlock_irqrestore(&ac->lock, flags);
53 continue;
54 }
55
56 if (!list_empty(&ac->buf_list)) {
57 next = list_first_entry(&ac->buf_list,
58 struct tw686x_audio_buf, list);
59 list_move_tail(&next->list, &ac->buf_list);
60 done = ac->curr_bufs[!pb];
61 ac->curr_bufs[pb] = next;
62 }
63 spin_unlock_irqrestore(&ac->lock, flags);
64
65 if (!done || !next)
66 continue;
67
68
69
70
71 desc = &ac->dma_descs[pb];
72 if (desc->virt) {
73 memcpy(done->virt, desc->virt,
74 dev->period_size);
75 } else {
76 u32 reg = pb ? ADMA_B_ADDR[ch] : ADMA_P_ADDR[ch];
77 reg_write(dev, reg, next->dma);
78 }
79 ac->ptr = done->dma - ac->buf[0].dma;
80 snd_pcm_period_elapsed(ac->ss);
81 }
82}
83
84static int tw686x_pcm_hw_params(struct snd_pcm_substream *ss,
85 struct snd_pcm_hw_params *hw_params)
86{
87 return snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params));
88}
89
90static int tw686x_pcm_hw_free(struct snd_pcm_substream *ss)
91{
92 return snd_pcm_lib_free_pages(ss);
93}
94
95
96
97
98
99
100static const struct snd_pcm_hardware tw686x_capture_hw = {
101 .info = (SNDRV_PCM_INFO_MMAP |
102 SNDRV_PCM_INFO_INTERLEAVED |
103 SNDRV_PCM_INFO_BLOCK_TRANSFER |
104 SNDRV_PCM_INFO_MMAP_VALID),
105 .formats = SNDRV_PCM_FMTBIT_S16_LE,
106 .rates = SNDRV_PCM_RATE_8000_48000,
107 .rate_min = 8000,
108 .rate_max = 48000,
109 .channels_min = 1,
110 .channels_max = 1,
111 .buffer_bytes_max = TW686X_AUDIO_PAGE_MAX * AUDIO_DMA_SIZE_MAX,
112 .period_bytes_min = AUDIO_DMA_SIZE_MIN,
113 .period_bytes_max = AUDIO_DMA_SIZE_MAX,
114 .periods_min = TW686X_AUDIO_PERIODS_MIN,
115 .periods_max = TW686X_AUDIO_PERIODS_MAX,
116};
117
118static int tw686x_pcm_open(struct snd_pcm_substream *ss)
119{
120 struct tw686x_dev *dev = snd_pcm_substream_chip(ss);
121 struct tw686x_audio_channel *ac = &dev->audio_channels[ss->number];
122 struct snd_pcm_runtime *rt = ss->runtime;
123 int err;
124
125 ac->ss = ss;
126 rt->hw = tw686x_capture_hw;
127
128 err = snd_pcm_hw_constraint_integer(rt, SNDRV_PCM_HW_PARAM_PERIODS);
129 if (err < 0)
130 return err;
131
132 return 0;
133}
134
135static int tw686x_pcm_close(struct snd_pcm_substream *ss)
136{
137 struct tw686x_dev *dev = snd_pcm_substream_chip(ss);
138 struct tw686x_audio_channel *ac = &dev->audio_channels[ss->number];
139
140 ac->ss = NULL;
141 return 0;
142}
143
144static int tw686x_pcm_prepare(struct snd_pcm_substream *ss)
145{
146 struct tw686x_dev *dev = snd_pcm_substream_chip(ss);
147 struct tw686x_audio_channel *ac = &dev->audio_channels[ss->number];
148 struct snd_pcm_runtime *rt = ss->runtime;
149 unsigned int period_size = snd_pcm_lib_period_bytes(ss);
150 struct tw686x_audio_buf *p_buf, *b_buf;
151 unsigned long flags;
152 int i;
153
154 spin_lock_irqsave(&dev->lock, flags);
155
156
157
158
159 if (((dev->audio_rate != rt->rate) ||
160 (dev->period_size != period_size)) && dev->audio_enabled)
161 goto err_audio_busy;
162
163 tw686x_disable_channel(dev, AUDIO_CHANNEL_OFFSET + ac->ch);
164 spin_unlock_irqrestore(&dev->lock, flags);
165
166 if (dev->audio_rate != rt->rate) {
167 u32 reg;
168
169 dev->audio_rate = rt->rate;
170 reg = ((125000000 / rt->rate) << 16) +
171 ((125000000 % rt->rate) << 16) / rt->rate;
172
173 reg_write(dev, AUDIO_CONTROL2, reg);
174 }
175
176 if (dev->period_size != period_size) {
177 u32 reg;
178
179 dev->period_size = period_size;
180 reg = reg_read(dev, AUDIO_CONTROL1);
181 reg &= ~(AUDIO_DMA_SIZE_MASK << AUDIO_DMA_SIZE_SHIFT);
182 reg |= period_size << AUDIO_DMA_SIZE_SHIFT;
183
184 reg_write(dev, AUDIO_CONTROL1, reg);
185 }
186
187 if (rt->periods < TW686X_AUDIO_PERIODS_MIN ||
188 rt->periods > TW686X_AUDIO_PERIODS_MAX)
189 return -EINVAL;
190
191 spin_lock_irqsave(&ac->lock, flags);
192 INIT_LIST_HEAD(&ac->buf_list);
193
194 for (i = 0; i < rt->periods; i++) {
195 ac->buf[i].dma = rt->dma_addr + period_size * i;
196 ac->buf[i].virt = rt->dma_area + period_size * i;
197 INIT_LIST_HEAD(&ac->buf[i].list);
198 list_add_tail(&ac->buf[i].list, &ac->buf_list);
199 }
200
201 p_buf = list_first_entry(&ac->buf_list, struct tw686x_audio_buf, list);
202 list_move_tail(&p_buf->list, &ac->buf_list);
203
204 b_buf = list_first_entry(&ac->buf_list, struct tw686x_audio_buf, list);
205 list_move_tail(&b_buf->list, &ac->buf_list);
206
207 ac->curr_bufs[0] = p_buf;
208 ac->curr_bufs[1] = b_buf;
209 ac->ptr = 0;
210
211 if (dev->dma_mode != TW686X_DMA_MODE_MEMCPY) {
212 reg_write(dev, ADMA_P_ADDR[ac->ch], p_buf->dma);
213 reg_write(dev, ADMA_B_ADDR[ac->ch], b_buf->dma);
214 }
215
216 spin_unlock_irqrestore(&ac->lock, flags);
217
218 return 0;
219
220err_audio_busy:
221 spin_unlock_irqrestore(&dev->lock, flags);
222 return -EBUSY;
223}
224
225static int tw686x_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
226{
227 struct tw686x_dev *dev = snd_pcm_substream_chip(ss);
228 struct tw686x_audio_channel *ac = &dev->audio_channels[ss->number];
229 unsigned long flags;
230 int err = 0;
231
232 switch (cmd) {
233 case SNDRV_PCM_TRIGGER_START:
234 if (ac->curr_bufs[0] && ac->curr_bufs[1]) {
235 spin_lock_irqsave(&dev->lock, flags);
236 dev->audio_enabled = 1;
237 tw686x_enable_channel(dev,
238 AUDIO_CHANNEL_OFFSET + ac->ch);
239 spin_unlock_irqrestore(&dev->lock, flags);
240
241 mod_timer(&dev->dma_delay_timer,
242 jiffies + msecs_to_jiffies(100));
243 } else {
244 err = -EIO;
245 }
246 break;
247 case SNDRV_PCM_TRIGGER_STOP:
248 spin_lock_irqsave(&dev->lock, flags);
249 dev->audio_enabled = 0;
250 tw686x_disable_channel(dev, AUDIO_CHANNEL_OFFSET + ac->ch);
251 spin_unlock_irqrestore(&dev->lock, flags);
252
253 spin_lock_irqsave(&ac->lock, flags);
254 ac->curr_bufs[0] = NULL;
255 ac->curr_bufs[1] = NULL;
256 spin_unlock_irqrestore(&ac->lock, flags);
257 break;
258 default:
259 err = -EINVAL;
260 }
261 return err;
262}
263
264static snd_pcm_uframes_t tw686x_pcm_pointer(struct snd_pcm_substream *ss)
265{
266 struct tw686x_dev *dev = snd_pcm_substream_chip(ss);
267 struct tw686x_audio_channel *ac = &dev->audio_channels[ss->number];
268
269 return bytes_to_frames(ss->runtime, ac->ptr);
270}
271
272static const struct snd_pcm_ops tw686x_pcm_ops = {
273 .open = tw686x_pcm_open,
274 .close = tw686x_pcm_close,
275 .ioctl = snd_pcm_lib_ioctl,
276 .hw_params = tw686x_pcm_hw_params,
277 .hw_free = tw686x_pcm_hw_free,
278 .prepare = tw686x_pcm_prepare,
279 .trigger = tw686x_pcm_trigger,
280 .pointer = tw686x_pcm_pointer,
281};
282
283static int tw686x_snd_pcm_init(struct tw686x_dev *dev)
284{
285 struct snd_card *card = dev->snd_card;
286 struct snd_pcm *pcm;
287 struct snd_pcm_substream *ss;
288 unsigned int i;
289 int err;
290
291 err = snd_pcm_new(card, card->driver, 0, 0, max_channels(dev), &pcm);
292 if (err < 0)
293 return err;
294
295 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &tw686x_pcm_ops);
296 snd_pcm_chip(pcm) = dev;
297 pcm->info_flags = 0;
298 strlcpy(pcm->name, "tw686x PCM", sizeof(pcm->name));
299
300 for (i = 0, ss = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
301 ss; ss = ss->next, i++)
302 snprintf(ss->name, sizeof(ss->name), "vch%u audio", i);
303
304 return snd_pcm_lib_preallocate_pages_for_all(pcm,
305 SNDRV_DMA_TYPE_DEV,
306 snd_dma_pci_data(dev->pci_dev),
307 TW686X_AUDIO_PAGE_MAX * AUDIO_DMA_SIZE_MAX,
308 TW686X_AUDIO_PAGE_MAX * AUDIO_DMA_SIZE_MAX);
309}
310
311static void tw686x_audio_dma_free(struct tw686x_dev *dev,
312 struct tw686x_audio_channel *ac)
313{
314 int pb;
315
316 for (pb = 0; pb < 2; pb++) {
317 if (!ac->dma_descs[pb].virt)
318 continue;
319 pci_free_consistent(dev->pci_dev, ac->dma_descs[pb].size,
320 ac->dma_descs[pb].virt,
321 ac->dma_descs[pb].phys);
322 ac->dma_descs[pb].virt = NULL;
323 }
324}
325
326static int tw686x_audio_dma_alloc(struct tw686x_dev *dev,
327 struct tw686x_audio_channel *ac)
328{
329 int pb;
330
331
332
333
334
335
336 if (dev->dma_mode != TW686X_DMA_MODE_MEMCPY)
337 return 0;
338
339 for (pb = 0; pb < 2; pb++) {
340 u32 reg = pb ? ADMA_B_ADDR[ac->ch] : ADMA_P_ADDR[ac->ch];
341 void *virt;
342
343 virt = pci_alloc_consistent(dev->pci_dev, AUDIO_DMA_SIZE_MAX,
344 &ac->dma_descs[pb].phys);
345 if (!virt) {
346 dev_err(&dev->pci_dev->dev,
347 "dma%d: unable to allocate audio DMA %s-buffer\n",
348 ac->ch, pb ? "B" : "P");
349 return -ENOMEM;
350 }
351 ac->dma_descs[pb].virt = virt;
352 ac->dma_descs[pb].size = AUDIO_DMA_SIZE_MAX;
353 reg_write(dev, reg, ac->dma_descs[pb].phys);
354 }
355 return 0;
356}
357
358void tw686x_audio_free(struct tw686x_dev *dev)
359{
360 unsigned long flags;
361 u32 dma_ch_mask;
362 u32 dma_cmd;
363
364 spin_lock_irqsave(&dev->lock, flags);
365 dma_cmd = reg_read(dev, DMA_CMD);
366 dma_ch_mask = reg_read(dev, DMA_CHANNEL_ENABLE);
367 reg_write(dev, DMA_CMD, dma_cmd & ~0xff00);
368 reg_write(dev, DMA_CHANNEL_ENABLE, dma_ch_mask & ~0xff00);
369 spin_unlock_irqrestore(&dev->lock, flags);
370
371 if (!dev->snd_card)
372 return;
373 snd_card_free(dev->snd_card);
374 dev->snd_card = NULL;
375}
376
377int tw686x_audio_init(struct tw686x_dev *dev)
378{
379 struct pci_dev *pci_dev = dev->pci_dev;
380 struct snd_card *card;
381 int err, ch;
382
383
384 reg_write(dev, AUDIO_CONTROL1, BIT(0));
385
386 err = snd_card_new(&pci_dev->dev, SNDRV_DEFAULT_IDX1,
387 SNDRV_DEFAULT_STR1,
388 THIS_MODULE, 0, &card);
389 if (err < 0)
390 return err;
391
392 dev->snd_card = card;
393 strlcpy(card->driver, "tw686x", sizeof(card->driver));
394 strlcpy(card->shortname, "tw686x", sizeof(card->shortname));
395 strlcpy(card->longname, pci_name(pci_dev), sizeof(card->longname));
396 snd_card_set_dev(card, &pci_dev->dev);
397
398 for (ch = 0; ch < max_channels(dev); ch++) {
399 struct tw686x_audio_channel *ac;
400
401 ac = &dev->audio_channels[ch];
402 spin_lock_init(&ac->lock);
403 ac->dev = dev;
404 ac->ch = ch;
405
406 err = tw686x_audio_dma_alloc(dev, ac);
407 if (err < 0)
408 goto err_cleanup;
409 }
410
411 err = tw686x_snd_pcm_init(dev);
412 if (err < 0)
413 goto err_cleanup;
414
415 err = snd_card_register(card);
416 if (!err)
417 return 0;
418
419err_cleanup:
420 for (ch = 0; ch < max_channels(dev); ch++) {
421 if (!dev->audio_channels[ch].dev)
422 continue;
423 tw686x_audio_dma_free(dev, &dev->audio_channels[ch]);
424 }
425 snd_card_free(card);
426 dev->snd_card = NULL;
427 return err;
428}
429
