Commit | Line | Data |
---|---|---|
705ececd | 1 | /* |
c078a4aa | 2 | * Line 6 Linux USB driver |
705ececd | 3 | * |
1027f476 | 4 | * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) |
705ececd MG |
5 | * |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License as | |
8 | * published by the Free Software Foundation, version 2. | |
9 | * | |
10 | */ | |
11 | ||
140e28b8 | 12 | #include <linux/slab.h> |
705ececd MG |
13 | #include <sound/core.h> |
14 | #include <sound/pcm.h> | |
15 | #include <sound/pcm_params.h> | |
16 | ||
1027f476 MG |
17 | #include "capture.h" |
18 | #include "driver.h" | |
705ececd | 19 | #include "pcm.h" |
b702ed25 | 20 | #include "playback.h" |
705ececd | 21 | |
705ececd MG |
22 | /* |
23 | Software stereo volume control. | |
24 | */ | |
010f378e GKH |
25 | static void change_volume(struct urb *urb_out, int volume[], |
26 | int bytes_per_frame) | |
705ececd MG |
27 | { |
28 | int chn = 0; | |
29 | ||
010f378e | 30 | if (volume[0] == 256 && volume[1] == 256) |
45af4977 | 31 | return; /* maximum volume - no change */ |
705ececd | 32 | |
010f378e | 33 | if (bytes_per_frame == 4) { |
705ececd | 34 | short *p, *buf_end; |
a6b4699d | 35 | |
705ececd MG |
36 | p = (short *)urb_out->transfer_buffer; |
37 | buf_end = p + urb_out->transfer_buffer_length / sizeof(*p); | |
38 | ||
010f378e | 39 | for (; p < buf_end; ++p) { |
c8491535 TI |
40 | int val = (*p * volume[chn & 1]) >> 8; |
41 | *p = clamp(val, 0x7fff, -0x8000); | |
705ececd MG |
42 | ++chn; |
43 | } | |
010f378e | 44 | } else if (bytes_per_frame == 6) { |
705ececd | 45 | unsigned char *p, *buf_end; |
f3c5261e | 46 | |
705ececd MG |
47 | p = (unsigned char *)urb_out->transfer_buffer; |
48 | buf_end = p + urb_out->transfer_buffer_length; | |
49 | ||
010f378e GKH |
50 | for (; p < buf_end; p += 3) { |
51 | int val; | |
a6b4699d | 52 | |
010f378e | 53 | val = p[0] + (p[1] << 8) + ((signed char)p[2] << 16); |
705ececd | 54 | val = (val * volume[chn & 1]) >> 8; |
c8491535 | 55 | val = clamp(val, 0x7fffff, -0x800000); |
705ececd MG |
56 | p[0] = val; |
57 | p[1] = val >> 8; | |
58 | p[2] = val >> 16; | |
59 | ++chn; | |
60 | } | |
61 | } | |
62 | } | |
63 | ||
1027f476 MG |
64 | /* |
65 | Create signal for impulse response test. | |
66 | */ | |
67 | static void create_impulse_test_signal(struct snd_line6_pcm *line6pcm, | |
68 | struct urb *urb_out, int bytes_per_frame) | |
69 | { | |
70 | int frames = urb_out->transfer_buffer_length / bytes_per_frame; | |
71 | ||
72 | if (bytes_per_frame == 4) { | |
e1a164d7 MG |
73 | int i; |
74 | short *pi = (short *)line6pcm->prev_fbuf; | |
75 | short *po = (short *)urb_out->transfer_buffer; | |
76 | ||
77 | for (i = 0; i < frames; ++i) { | |
78 | po[0] = pi[0]; | |
79 | po[1] = 0; | |
80 | pi += 2; | |
81 | po += 2; | |
82 | } | |
1027f476 MG |
83 | } else if (bytes_per_frame == 6) { |
84 | int i, j; | |
85 | unsigned char *pi = line6pcm->prev_fbuf; | |
86 | unsigned char *po = urb_out->transfer_buffer; | |
87 | ||
88 | for (i = 0; i < frames; ++i) { | |
89 | for (j = 0; j < bytes_per_frame / 2; ++j) | |
90 | po[j] = pi[j]; | |
91 | ||
92 | for (; j < bytes_per_frame; ++j) | |
93 | po[j] = 0; | |
94 | ||
95 | pi += bytes_per_frame; | |
96 | po += bytes_per_frame; | |
97 | } | |
e1a164d7 MG |
98 | } |
99 | if (--line6pcm->impulse_count <= 0) { | |
100 | ((unsigned char *)(urb_out->transfer_buffer))[bytes_per_frame - | |
101 | 1] = | |
102 | line6pcm->impulse_volume; | |
103 | line6pcm->impulse_count = line6pcm->impulse_period; | |
1027f476 MG |
104 | } |
105 | } | |
106 | ||
1027f476 MG |
107 | /* |
108 | Add signal to buffer for software monitoring. | |
109 | */ | |
110 | static void add_monitor_signal(struct urb *urb_out, unsigned char *signal, | |
111 | int volume, int bytes_per_frame) | |
112 | { | |
113 | if (volume == 0) | |
114 | return; /* zero volume - no change */ | |
115 | ||
116 | if (bytes_per_frame == 4) { | |
117 | short *pi, *po, *buf_end; | |
a6b4699d | 118 | |
1027f476 MG |
119 | pi = (short *)signal; |
120 | po = (short *)urb_out->transfer_buffer; | |
121 | buf_end = po + urb_out->transfer_buffer_length / sizeof(*po); | |
122 | ||
c8491535 TI |
123 | for (; po < buf_end; ++pi, ++po) { |
124 | int val = *po + ((*pi * volume) >> 8); | |
125 | *po = clamp(val, 0x7fff, -0x8000); | |
126 | } | |
1027f476 MG |
127 | } |
128 | ||
129 | /* | |
e1a164d7 MG |
130 | We don't need to handle devices with 6 bytes per frame here |
131 | since they all support hardware monitoring. | |
132 | */ | |
1027f476 MG |
133 | } |
134 | ||
705ececd MG |
135 | /* |
136 | Find a free URB, prepare audio data, and submit URB. | |
3d3ae445 | 137 | must be called in line6pcm->out.lock context |
705ececd | 138 | */ |
1027f476 | 139 | static int submit_audio_out_urb(struct snd_line6_pcm *line6pcm) |
705ececd MG |
140 | { |
141 | int index; | |
705ececd | 142 | int i, urb_size, urb_frames; |
e1a164d7 | 143 | int ret; |
705ececd | 144 | const int bytes_per_frame = line6pcm->properties->bytes_per_frame; |
45af4977 SB |
145 | const int frame_increment = |
146 | line6pcm->properties->snd_line6_rates.rats[0].num_min; | |
147 | const int frame_factor = | |
148 | line6pcm->properties->snd_line6_rates.rats[0].den * | |
149 | (USB_INTERVALS_PER_SECOND / LINE6_ISO_INTERVAL); | |
705ececd MG |
150 | struct urb *urb_out; |
151 | ||
45af4977 | 152 | index = |
ad0119ab | 153 | find_first_zero_bit(&line6pcm->out.active_urbs, LINE6_ISO_BUFFERS); |
705ececd | 154 | |
010f378e | 155 | if (index < 0 || index >= LINE6_ISO_BUFFERS) { |
1027f476 | 156 | dev_err(line6pcm->line6->ifcdev, "no free URB found\n"); |
705ececd MG |
157 | return -EINVAL; |
158 | } | |
159 | ||
ad0119ab | 160 | urb_out = line6pcm->out.urbs[index]; |
705ececd MG |
161 | urb_size = 0; |
162 | ||
010f378e | 163 | for (i = 0; i < LINE6_ISO_PACKETS; ++i) { |
705ececd | 164 | /* compute frame size for given sampling rate */ |
1027f476 | 165 | int fsize = 0; |
45af4977 SB |
166 | struct usb_iso_packet_descriptor *fout = |
167 | &urb_out->iso_frame_desc[i]; | |
1027f476 | 168 | |
f2bb614b | 169 | fsize = line6pcm->prev_fsize; |
1027f476 MG |
170 | if (fsize == 0) { |
171 | int n; | |
a6b4699d | 172 | |
ad0119ab TI |
173 | line6pcm->out.count += frame_increment; |
174 | n = line6pcm->out.count / frame_factor; | |
175 | line6pcm->out.count -= n * frame_factor; | |
1027f476 MG |
176 | fsize = n * bytes_per_frame; |
177 | } | |
178 | ||
705ececd | 179 | fout->offset = urb_size; |
1027f476 MG |
180 | fout->length = fsize; |
181 | urb_size += fsize; | |
182 | } | |
183 | ||
184 | if (urb_size == 0) { | |
185 | /* can't determine URB size */ | |
6a8ec876 | 186 | dev_err(line6pcm->line6->ifcdev, "driver bug: urb_size = 0\n"); |
1027f476 | 187 | return -EINVAL; |
705ececd MG |
188 | } |
189 | ||
190 | urb_frames = urb_size / bytes_per_frame; | |
1027f476 | 191 | urb_out->transfer_buffer = |
ad0119ab | 192 | line6pcm->out.buffer + |
153e3876 | 193 | index * LINE6_ISO_PACKETS * line6pcm->max_packet_size; |
1027f476 MG |
194 | urb_out->transfer_buffer_length = urb_size; |
195 | urb_out->context = line6pcm; | |
196 | ||
63e20df1 TI |
197 | if (test_bit(LINE6_STREAM_PCM, &line6pcm->out.running) && |
198 | !test_bit(LINE6_FLAG_PAUSE_PLAYBACK, &line6pcm->flags)) { | |
1027f476 MG |
199 | struct snd_pcm_runtime *runtime = |
200 | get_substream(line6pcm, SNDRV_PCM_STREAM_PLAYBACK)->runtime; | |
705ececd | 201 | |
ad0119ab | 202 | if (line6pcm->out.pos + urb_frames > runtime->buffer_size) { |
705ececd | 203 | /* |
45af4977 SB |
204 | The transferred area goes over buffer boundary, |
205 | copy the data to the temp buffer. | |
206 | */ | |
705ececd | 207 | int len; |
a6b4699d | 208 | |
ad0119ab | 209 | len = runtime->buffer_size - line6pcm->out.pos; |
705ececd | 210 | |
010f378e | 211 | if (len > 0) { |
1027f476 | 212 | memcpy(urb_out->transfer_buffer, |
45af4977 | 213 | runtime->dma_area + |
ad0119ab | 214 | line6pcm->out.pos * bytes_per_frame, |
45af4977 | 215 | len * bytes_per_frame); |
1027f476 | 216 | memcpy(urb_out->transfer_buffer + |
45af4977 SB |
217 | len * bytes_per_frame, runtime->dma_area, |
218 | (urb_frames - len) * bytes_per_frame); | |
1027f476 | 219 | } else |
6a8ec876 SH |
220 | dev_err(line6pcm->line6->ifcdev, "driver bug: len = %d\n", |
221 | len); | |
010f378e | 222 | } else { |
1027f476 MG |
223 | memcpy(urb_out->transfer_buffer, |
224 | runtime->dma_area + | |
ad0119ab | 225 | line6pcm->out.pos * bytes_per_frame, |
1027f476 | 226 | urb_out->transfer_buffer_length); |
705ececd | 227 | } |
705ececd | 228 | |
ad0119ab TI |
229 | line6pcm->out.pos += urb_frames; |
230 | if (line6pcm->out.pos >= runtime->buffer_size) | |
231 | line6pcm->out.pos -= runtime->buffer_size; | |
62a109d9 TI |
232 | |
233 | change_volume(urb_out, line6pcm->volume_playback, | |
234 | bytes_per_frame); | |
1027f476 MG |
235 | } else { |
236 | memset(urb_out->transfer_buffer, 0, | |
237 | urb_out->transfer_buffer_length); | |
238 | } | |
705ececd | 239 | |
3d3ae445 TI |
240 | spin_lock_nested(&line6pcm->in.lock, SINGLE_DEPTH_NESTING); |
241 | if (line6pcm->prev_fbuf) { | |
63e20df1 | 242 | if (test_bit(LINE6_STREAM_IMPULSE, &line6pcm->out.running)) { |
1027f476 MG |
243 | create_impulse_test_signal(line6pcm, urb_out, |
244 | bytes_per_frame); | |
63e20df1 | 245 | if (test_bit(LINE6_STREAM_PCM, &line6pcm->in.running)) { |
e1a164d7 MG |
246 | line6_capture_copy(line6pcm, |
247 | urb_out->transfer_buffer, | |
248 | urb_out-> | |
249 | transfer_buffer_length); | |
250 | line6_capture_check_period(line6pcm, | |
30bb0e71 | 251 | urb_out->transfer_buffer_length); |
1027f476 MG |
252 | } |
253 | } else { | |
63e20df1 TI |
254 | if (!(line6pcm->line6->properties->capabilities & LINE6_CAP_HWMON) |
255 | && line6pcm->out.running && line6pcm->in.running) | |
1027f476 MG |
256 | add_monitor_signal(urb_out, line6pcm->prev_fbuf, |
257 | line6pcm->volume_monitor, | |
258 | bytes_per_frame); | |
1027f476 | 259 | } |
f2bb614b TI |
260 | line6pcm->prev_fbuf = NULL; |
261 | line6pcm->prev_fsize = 0; | |
1027f476 | 262 | } |
3d3ae445 | 263 | spin_unlock(&line6pcm->in.lock); |
705ececd | 264 | |
e1a164d7 MG |
265 | ret = usb_submit_urb(urb_out, GFP_ATOMIC); |
266 | ||
267 | if (ret == 0) | |
ad0119ab | 268 | set_bit(index, &line6pcm->out.active_urbs); |
705ececd | 269 | else |
1027f476 | 270 | dev_err(line6pcm->line6->ifcdev, |
e1a164d7 | 271 | "URB out #%d submission failed (%d)\n", index, ret); |
705ececd | 272 | |
705ececd MG |
273 | return 0; |
274 | } | |
275 | ||
276 | /* | |
277 | Submit all currently available playback URBs. | |
63e20df1 TI |
278 | must be called in line6pcm->out.lock context |
279 | */ | |
1027f476 | 280 | int line6_submit_audio_out_all_urbs(struct snd_line6_pcm *line6pcm) |
705ececd | 281 | { |
3d3ae445 | 282 | int ret = 0, i; |
705ececd | 283 | |
010f378e | 284 | for (i = 0; i < LINE6_ISO_BUFFERS; ++i) { |
1027f476 | 285 | ret = submit_audio_out_urb(line6pcm); |
010f378e | 286 | if (ret < 0) |
3d3ae445 | 287 | break; |
010f378e | 288 | } |
705ececd | 289 | |
3d3ae445 | 290 | return ret; |
705ececd MG |
291 | } |
292 | ||
705ececd MG |
293 | /* |
294 | Callback for completed playback URB. | |
295 | */ | |
0c7ab158 | 296 | static void audio_out_callback(struct urb *urb) |
705ececd MG |
297 | { |
298 | int i, index, length = 0, shutdown = 0; | |
299 | unsigned long flags; | |
e1a164d7 | 300 | struct snd_line6_pcm *line6pcm = (struct snd_line6_pcm *)urb->context; |
45af4977 | 301 | struct snd_pcm_substream *substream = |
1027f476 MG |
302 | get_substream(line6pcm, SNDRV_PCM_STREAM_PLAYBACK); |
303 | ||
304 | #if USE_CLEAR_BUFFER_WORKAROUND | |
305 | memset(urb->transfer_buffer, 0, urb->transfer_buffer_length); | |
306 | #endif | |
307 | ||
ad0119ab | 308 | line6pcm->out.last_frame = urb->start_frame; |
705ececd MG |
309 | |
310 | /* find index of URB */ | |
9fb754b7 | 311 | for (index = 0; index < LINE6_ISO_BUFFERS; index++) |
ad0119ab | 312 | if (urb == line6pcm->out.urbs[index]) |
705ececd MG |
313 | break; |
314 | ||
9fb754b7 | 315 | if (index >= LINE6_ISO_BUFFERS) |
45af4977 | 316 | return; /* URB has been unlinked asynchronously */ |
705ececd | 317 | |
9fb754b7 | 318 | for (i = 0; i < LINE6_ISO_PACKETS; i++) |
705ececd MG |
319 | length += urb->iso_frame_desc[i].length; |
320 | ||
ad0119ab | 321 | spin_lock_irqsave(&line6pcm->out.lock, flags); |
705ececd | 322 | |
63e20df1 | 323 | if (test_bit(LINE6_STREAM_PCM, &line6pcm->out.running)) { |
1027f476 | 324 | struct snd_pcm_runtime *runtime = substream->runtime; |
f3c5261e | 325 | |
ad0119ab | 326 | line6pcm->out.pos_done += |
1027f476 MG |
327 | length / line6pcm->properties->bytes_per_frame; |
328 | ||
ad0119ab TI |
329 | if (line6pcm->out.pos_done >= runtime->buffer_size) |
330 | line6pcm->out.pos_done -= runtime->buffer_size; | |
1027f476 | 331 | } |
705ececd | 332 | |
ad0119ab | 333 | clear_bit(index, &line6pcm->out.active_urbs); |
705ececd | 334 | |
9fb754b7 | 335 | for (i = 0; i < LINE6_ISO_PACKETS; i++) |
e1a164d7 | 336 | if (urb->iso_frame_desc[i].status == -EXDEV) { |
705ececd MG |
337 | shutdown = 1; |
338 | break; | |
339 | } | |
340 | ||
ad0119ab | 341 | if (test_and_clear_bit(index, &line6pcm->out.unlink_urbs)) |
705ececd MG |
342 | shutdown = 1; |
343 | ||
010f378e | 344 | if (!shutdown) { |
1027f476 | 345 | submit_audio_out_urb(line6pcm); |
705ececd | 346 | |
63e20df1 | 347 | if (test_bit(LINE6_STREAM_PCM, &line6pcm->out.running)) { |
ad0119ab TI |
348 | line6pcm->out.bytes += length; |
349 | if (line6pcm->out.bytes >= line6pcm->out.period) { | |
350 | line6pcm->out.bytes %= line6pcm->out.period; | |
3d3ae445 | 351 | spin_unlock(&line6pcm->out.lock); |
1027f476 | 352 | snd_pcm_period_elapsed(substream); |
3d3ae445 | 353 | spin_lock(&line6pcm->out.lock); |
1027f476 | 354 | } |
705ececd MG |
355 | } |
356 | } | |
3d3ae445 | 357 | spin_unlock_irqrestore(&line6pcm->out.lock, flags); |
705ececd MG |
358 | } |
359 | ||
360 | /* open playback callback */ | |
361 | static int snd_line6_playback_open(struct snd_pcm_substream *substream) | |
362 | { | |
363 | int err; | |
364 | struct snd_pcm_runtime *runtime = substream->runtime; | |
365 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); | |
366 | ||
010f378e | 367 | err = snd_pcm_hw_constraint_ratdens(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
e1a164d7 MG |
368 | (&line6pcm-> |
369 | properties->snd_line6_rates)); | |
010f378e | 370 | if (err < 0) |
705ececd MG |
371 | return err; |
372 | ||
373 | runtime->hw = line6pcm->properties->snd_line6_playback_hw; | |
374 | return 0; | |
375 | } | |
376 | ||
377 | /* close playback callback */ | |
378 | static int snd_line6_playback_close(struct snd_pcm_substream *substream) | |
379 | { | |
380 | return 0; | |
381 | } | |
382 | ||
705ececd MG |
383 | /* playback operators */ |
384 | struct snd_pcm_ops snd_line6_playback_ops = { | |
e1a164d7 MG |
385 | .open = snd_line6_playback_open, |
386 | .close = snd_line6_playback_close, | |
387 | .ioctl = snd_pcm_lib_ioctl, | |
63e20df1 TI |
388 | .hw_params = snd_line6_hw_params, |
389 | .hw_free = snd_line6_hw_free, | |
e1a164d7 MG |
390 | .prepare = snd_line6_prepare, |
391 | .trigger = snd_line6_trigger, | |
2954f914 | 392 | .pointer = snd_line6_pointer, |
705ececd MG |
393 | }; |
394 | ||
1027f476 | 395 | int line6_create_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
705ececd | 396 | { |
16d603d3 | 397 | struct usb_line6 *line6 = line6pcm->line6; |
705ececd MG |
398 | int i; |
399 | ||
400 | /* create audio URBs and fill in constant values: */ | |
010f378e | 401 | for (i = 0; i < LINE6_ISO_BUFFERS; ++i) { |
705ececd MG |
402 | struct urb *urb; |
403 | ||
404 | /* URB for audio out: */ | |
ad0119ab | 405 | urb = line6pcm->out.urbs[i] = |
45af4977 | 406 | usb_alloc_urb(LINE6_ISO_PACKETS, GFP_KERNEL); |
705ececd | 407 | |
a019f5e8 | 408 | if (urb == NULL) |
705ececd | 409 | return -ENOMEM; |
705ececd | 410 | |
16d603d3 | 411 | urb->dev = line6->usbdev; |
45af4977 | 412 | urb->pipe = |
16d603d3 CR |
413 | usb_sndisocpipe(line6->usbdev, |
414 | line6->properties->ep_audio_w & | |
e1a164d7 | 415 | USB_ENDPOINT_NUMBER_MASK); |
705ececd MG |
416 | urb->transfer_flags = URB_ISO_ASAP; |
417 | urb->start_frame = -1; | |
418 | urb->number_of_packets = LINE6_ISO_PACKETS; | |
419 | urb->interval = LINE6_ISO_INTERVAL; | |
420 | urb->error_count = 0; | |
421 | urb->complete = audio_out_callback; | |
422 | } | |
423 | ||
424 | return 0; | |
425 | } |