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1/*
2 * Copyright (C) 2010 Bluecherry, LLC www.bluecherrydvr.com
3 * Copyright (C) 2010 Ben Collins <bcollins@bluecherry.net>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 */
19
20#include <linux/kernel.h>
21#include <linux/mempool.h>
22#include <linux/poll.h>
23#include <linux/kthread.h>
24#include <linux/slab.h>
25#include <linux/freezer.h>
26#include <linux/export.h>
27#include <sound/core.h>
28#include <sound/initval.h>
29#include <sound/pcm.h>
30#include <sound/control.h>
31#include "solo6x10.h"
32#include "tw28.h"
33
34#define G723_INTR_ORDER 0
35#define G723_FDMA_PAGES 32
36#define G723_PERIOD_BYTES 48
37#define G723_PERIOD_BLOCK 1024
38#define G723_FRAMES_PER_PAGE 48
39
40/* Sets up channels 16-19 for decoding and 0-15 for encoding */
41#define OUTMODE_MASK 0x300
42
43#define SAMPLERATE 8000
44#define BITRATE 25
45
46/* The solo writes to 1k byte pages, 32 pages, in the dma. Each 1k page
47 * is broken down to 20 * 48 byte regions (one for each channel possible)
48 * with the rest of the page being dummy data. */
49#define MAX_BUFFER (G723_PERIOD_BYTES * PERIODS_MAX)
50#define IRQ_PAGES 4 /* 0 - 4 */
51#define PERIODS_MIN (1 << IRQ_PAGES)
52#define PERIODS_MAX G723_FDMA_PAGES
53
54struct solo_snd_pcm {
55 int on;
56 spinlock_t lock;
57 struct solo_dev *solo_dev;
58 unsigned char g723_buf[G723_PERIOD_BYTES];
59};
60
61static void solo_g723_config(struct solo_dev *solo_dev)
62{
63 int clk_div;
64
65 clk_div = SOLO_CLOCK_MHZ / (SAMPLERATE * (BITRATE * 2) * 2);
66
67 solo_reg_write(solo_dev, SOLO_AUDIO_SAMPLE,
68 SOLO_AUDIO_BITRATE(BITRATE) |
69 SOLO_AUDIO_CLK_DIV(clk_div));
70
71 solo_reg_write(solo_dev, SOLO_AUDIO_FDMA_INTR,
72 SOLO_AUDIO_FDMA_INTERVAL(IRQ_PAGES) |
73 SOLO_AUDIO_INTR_ORDER(G723_INTR_ORDER) |
74 SOLO_AUDIO_FDMA_BASE(SOLO_G723_EXT_ADDR(solo_dev) >> 16));
75
76 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL,
77 SOLO_AUDIO_ENABLE | SOLO_AUDIO_I2S_MODE |
78 SOLO_AUDIO_I2S_MULTI(3) | SOLO_AUDIO_MODE(OUTMODE_MASK));
79}
80
81void solo_g723_isr(struct solo_dev *solo_dev)
82{
83 struct snd_pcm_str *pstr =
84 &solo_dev->snd_pcm->streams[SNDRV_PCM_STREAM_CAPTURE];
85 struct snd_pcm_substream *ss;
86 struct solo_snd_pcm *solo_pcm;
87
88 solo_reg_write(solo_dev, SOLO_IRQ_STAT, SOLO_IRQ_G723);
89
90 for (ss = pstr->substream; ss != NULL; ss = ss->next) {
91 if (snd_pcm_substream_chip(ss) == NULL)
92 continue;
93
94 /* This means open() hasn't been called on this one */
95 if (snd_pcm_substream_chip(ss) == solo_dev)
96 continue;
97
98 /* Haven't triggered a start yet */
99 solo_pcm = snd_pcm_substream_chip(ss);
100 if (!solo_pcm->on)
101 continue;
102
103 snd_pcm_period_elapsed(ss);
104 }
105}
106
107static int snd_solo_hw_params(struct snd_pcm_substream *ss,
108 struct snd_pcm_hw_params *hw_params)
109{
110 return snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params));
111}
112
113static int snd_solo_hw_free(struct snd_pcm_substream *ss)
114{
115 return snd_pcm_lib_free_pages(ss);
116}
117
118static struct snd_pcm_hardware snd_solo_pcm_hw = {
119 .info = (SNDRV_PCM_INFO_MMAP |
120 SNDRV_PCM_INFO_INTERLEAVED |
121 SNDRV_PCM_INFO_BLOCK_TRANSFER |
122 SNDRV_PCM_INFO_MMAP_VALID),
123 .formats = SNDRV_PCM_FMTBIT_U8,
124 .rates = SNDRV_PCM_RATE_8000,
125 .rate_min = 8000,
126 .rate_max = 8000,
127 .channels_min = 1,
128 .channels_max = 1,
129 .buffer_bytes_max = MAX_BUFFER,
130 .period_bytes_min = G723_PERIOD_BYTES,
131 .period_bytes_max = G723_PERIOD_BYTES,
132 .periods_min = PERIODS_MIN,
133 .periods_max = PERIODS_MAX,
134};
135
136static int snd_solo_pcm_open(struct snd_pcm_substream *ss)
137{
138 struct solo_dev *solo_dev = snd_pcm_substream_chip(ss);
139 struct solo_snd_pcm *solo_pcm;
140
141 solo_pcm = kzalloc(sizeof(*solo_pcm), GFP_KERNEL);
142 if (solo_pcm == NULL)
143 return -ENOMEM;
144
145 spin_lock_init(&solo_pcm->lock);
146 solo_pcm->solo_dev = solo_dev;
147 ss->runtime->hw = snd_solo_pcm_hw;
148
149 snd_pcm_substream_chip(ss) = solo_pcm;
150
151 return 0;
152}
153
154static int snd_solo_pcm_close(struct snd_pcm_substream *ss)
155{
156 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
157
158 snd_pcm_substream_chip(ss) = solo_pcm->solo_dev;
159 kfree(solo_pcm);
160
161 return 0;
162}
163
164static int snd_solo_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
165{
166 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
167 struct solo_dev *solo_dev = solo_pcm->solo_dev;
168 int ret = 0;
169
170 spin_lock(&solo_pcm->lock);
171
172 switch (cmd) {
173 case SNDRV_PCM_TRIGGER_START:
174 if (solo_pcm->on == 0) {
175 /* If this is the first user, switch on interrupts */
176 if (atomic_inc_return(&solo_dev->snd_users) == 1)
177 solo_irq_on(solo_dev, SOLO_IRQ_G723);
178 solo_pcm->on = 1;
179 }
180 break;
181 case SNDRV_PCM_TRIGGER_STOP:
182 if (solo_pcm->on) {
183 /* If this was our last user, switch them off */
184 if (atomic_dec_return(&solo_dev->snd_users) == 0)
185 solo_irq_off(solo_dev, SOLO_IRQ_G723);
186 solo_pcm->on = 0;
187 }
188 break;
189 default:
190 ret = -EINVAL;
191 }
192
193 spin_unlock(&solo_pcm->lock);
194
195 return ret;
196}
197
198static int snd_solo_pcm_prepare(struct snd_pcm_substream *ss)
199{
200 return 0;
201}
202
203static snd_pcm_uframes_t snd_solo_pcm_pointer(struct snd_pcm_substream *ss)
204{
205 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
206 struct solo_dev *solo_dev = solo_pcm->solo_dev;
207 snd_pcm_uframes_t idx = solo_reg_read(solo_dev, SOLO_AUDIO_STA) & 0x1f;
208
209 return idx * G723_FRAMES_PER_PAGE;
210}
211
212static int snd_solo_pcm_copy(struct snd_pcm_substream *ss, int channel,
213 snd_pcm_uframes_t pos, void __user *dst,
214 snd_pcm_uframes_t count)
215{
216 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
217 struct solo_dev *solo_dev = solo_pcm->solo_dev;
218 int err, i;
219
220 for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) {
221 int page = (pos / G723_FRAMES_PER_PAGE) + i;
222
223 err = solo_p2m_dma(solo_dev, SOLO_P2M_DMA_ID_G723E, 0,
224 solo_pcm->g723_buf,
225 SOLO_G723_EXT_ADDR(solo_dev) +
226 (page * G723_PERIOD_BLOCK) +
227 (ss->number * G723_PERIOD_BYTES),
228 G723_PERIOD_BYTES);
229 if (err)
230 return err;
231
232 err = copy_to_user(dst + (i * G723_PERIOD_BYTES),
233 solo_pcm->g723_buf, G723_PERIOD_BYTES);
234
235 if (err)
236 return -EFAULT;
237 }
238
239 return 0;
240}
241
242static struct snd_pcm_ops snd_solo_pcm_ops = {
243 .open = snd_solo_pcm_open,
244 .close = snd_solo_pcm_close,
245 .ioctl = snd_pcm_lib_ioctl,
246 .hw_params = snd_solo_hw_params,
247 .hw_free = snd_solo_hw_free,
248 .prepare = snd_solo_pcm_prepare,
249 .trigger = snd_solo_pcm_trigger,
250 .pointer = snd_solo_pcm_pointer,
251 .copy = snd_solo_pcm_copy,
252};
253
254static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol,
255 struct snd_ctl_elem_info *info)
256{
257 info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
258 info->count = 1;
259 info->value.integer.min = 0;
260 info->value.integer.max = 15;
261 info->value.integer.step = 1;
262
263 return 0;
264}
265
266static int snd_solo_capture_volume_get(struct snd_kcontrol *kcontrol,
267 struct snd_ctl_elem_value *value)
268{
269 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
270 u8 ch = value->id.numid - 1;
271
272 value->value.integer.value[0] = tw28_get_audio_gain(solo_dev, ch);
273
274 return 0;
275}
276
277static int snd_solo_capture_volume_put(struct snd_kcontrol *kcontrol,
278 struct snd_ctl_elem_value *value)
279{
280 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
281 u8 ch = value->id.numid - 1;
282 u8 old_val;
283
284 old_val = tw28_get_audio_gain(solo_dev, ch);
285 if (old_val == value->value.integer.value[0])
286 return 0;
287
288 tw28_set_audio_gain(solo_dev, ch, value->value.integer.value[0]);
289
290 return 1;
291}
292
293static struct snd_kcontrol_new snd_solo_capture_volume = {
294 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
295 .name = "Capture Volume",
296 .info = snd_solo_capture_volume_info,
297 .get = snd_solo_capture_volume_get,
298 .put = snd_solo_capture_volume_put,
299};
300
301static int solo_snd_pcm_init(struct solo_dev *solo_dev)
302{
303 struct snd_card *card = solo_dev->snd_card;
304 struct snd_pcm *pcm;
305 struct snd_pcm_substream *ss;
306 int ret;
307 int i;
308
309 ret = snd_pcm_new(card, card->driver, 0, 0, solo_dev->nr_chans,
310 &pcm);
311 if (ret < 0)
312 return ret;
313
314 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
315 &snd_solo_pcm_ops);
316
317 snd_pcm_chip(pcm) = solo_dev;
318 pcm->info_flags = 0;
319 strcpy(pcm->name, card->shortname);
320
321 for (i = 0, ss = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
322 ss; ss = ss->next, i++)
323 sprintf(ss->name, "Camera #%d Audio", i);
324
325 ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
326 SNDRV_DMA_TYPE_CONTINUOUS,
327 snd_dma_continuous_data(GFP_KERNEL),
328 MAX_BUFFER, MAX_BUFFER);
329 if (ret < 0)
330 return ret;
331
332 solo_dev->snd_pcm = pcm;
333
334 return 0;
335}
336
337int solo_g723_init(struct solo_dev *solo_dev)
338{
339 static struct snd_device_ops ops = { NULL };
340 struct snd_card *card;
341 struct snd_kcontrol_new kctl;
342 char name[32];
343 int ret;
344
345 atomic_set(&solo_dev->snd_users, 0);
346
347 /* Allows for easier mapping between video and audio */
348 sprintf(name, "Softlogic%d", solo_dev->vfd->num);
349
350 ret = snd_card_create(SNDRV_DEFAULT_IDX1, name, THIS_MODULE, 0,
351 &solo_dev->snd_card);
352 if (ret < 0)
353 return ret;
354
355 card = solo_dev->snd_card;
356
357 strcpy(card->driver, SOLO6X10_NAME);
358 strcpy(card->shortname, "SOLO-6x10 Audio");
359 sprintf(card->longname, "%s on %s IRQ %d", card->shortname,
360 pci_name(solo_dev->pdev), solo_dev->pdev->irq);
361 snd_card_set_dev(card, &solo_dev->pdev->dev);
362
363 ret = snd_device_new(card, SNDRV_DEV_LOWLEVEL, solo_dev, &ops);
364 if (ret < 0)
365 goto snd_error;
366
367 /* Mixer controls */
368 strcpy(card->mixername, "SOLO-6x10");
369 kctl = snd_solo_capture_volume;
370 kctl.count = solo_dev->nr_chans;
371 ret = snd_ctl_add(card, snd_ctl_new1(&kctl, solo_dev));
372 if (ret < 0)
373 return ret;
374
375 ret = solo_snd_pcm_init(solo_dev);
376 if (ret < 0)
377 goto snd_error;
378
379 ret = snd_card_register(card);
380 if (ret < 0)
381 goto snd_error;
382
383 solo_g723_config(solo_dev);
384
385 dev_info(&solo_dev->pdev->dev, "Alsa sound card as %s\n", name);
386
387 return 0;
388
389snd_error:
390 snd_card_free(card);
391 return ret;
392}
393
394void solo_g723_exit(struct solo_dev *solo_dev)
395{
396 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, 0);
397 solo_irq_off(solo_dev, SOLO_IRQ_G723);
398
399 snd_card_free(solo_dev->snd_card);
400}