Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 1 | /* |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 2 | * Line6 Linux USB driver - 0.9.1beta |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 3 | * |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 4 | * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 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 | |
Stefan Hajnoczi | 140e28b | 2011-11-23 08:20:45 +0000 | [diff] [blame] | 12 | #include <linux/slab.h> |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 13 | #include <sound/core.h> |
| 14 | #include <sound/pcm.h> |
| 15 | #include <sound/pcm_params.h> |
| 16 | |
| 17 | #include "audio.h" |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 18 | #include "capture.h" |
| 19 | #include "driver.h" |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 20 | #include "pcm.h" |
| 21 | #include "pod.h" |
Greg Kroah-Hartman | b702ed25 | 2009-02-27 20:45:03 -0800 | [diff] [blame] | 22 | #include "playback.h" |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 23 | |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 24 | /* |
| 25 | Software stereo volume control. |
| 26 | */ |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 27 | static void change_volume(struct urb *urb_out, int volume[], |
| 28 | int bytes_per_frame) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 29 | { |
| 30 | int chn = 0; |
| 31 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 32 | if (volume[0] == 256 && volume[1] == 256) |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 33 | return; /* maximum volume - no change */ |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 34 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 35 | if (bytes_per_frame == 4) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 36 | short *p, *buf_end; |
Fabian Mewes | a6b4699 | 2014-03-24 23:46:31 +0100 | [diff] [blame] | 37 | |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 38 | p = (short *)urb_out->transfer_buffer; |
| 39 | buf_end = p + urb_out->transfer_buffer_length / sizeof(*p); |
| 40 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 41 | for (; p < buf_end; ++p) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 42 | *p = (*p * volume[chn & 1]) >> 8; |
| 43 | ++chn; |
| 44 | } |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 45 | } else if (bytes_per_frame == 6) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 46 | unsigned char *p, *buf_end; |
Jerry Snitselaar | f3c5261 | 2014-04-24 00:31:48 -0700 | [diff] [blame] | 47 | |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 48 | p = (unsigned char *)urb_out->transfer_buffer; |
| 49 | buf_end = p + urb_out->transfer_buffer_length; |
| 50 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 51 | for (; p < buf_end; p += 3) { |
| 52 | int val; |
Fabian Mewes | a6b4699 | 2014-03-24 23:46:31 +0100 | [diff] [blame] | 53 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 54 | val = p[0] + (p[1] << 8) + ((signed char)p[2] << 16); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 55 | val = (val * volume[chn & 1]) >> 8; |
| 56 | p[0] = val; |
| 57 | p[1] = val >> 8; |
| 58 | p[2] = val >> 16; |
| 59 | ++chn; |
| 60 | } |
| 61 | } |
| 62 | } |
| 63 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 64 | #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE |
| 65 | |
| 66 | /* |
| 67 | Create signal for impulse response test. |
| 68 | */ |
| 69 | static void create_impulse_test_signal(struct snd_line6_pcm *line6pcm, |
| 70 | struct urb *urb_out, int bytes_per_frame) |
| 71 | { |
| 72 | int frames = urb_out->transfer_buffer_length / bytes_per_frame; |
| 73 | |
| 74 | if (bytes_per_frame == 4) { |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 75 | int i; |
| 76 | short *pi = (short *)line6pcm->prev_fbuf; |
| 77 | short *po = (short *)urb_out->transfer_buffer; |
| 78 | |
| 79 | for (i = 0; i < frames; ++i) { |
| 80 | po[0] = pi[0]; |
| 81 | po[1] = 0; |
| 82 | pi += 2; |
| 83 | po += 2; |
| 84 | } |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 85 | } else if (bytes_per_frame == 6) { |
| 86 | int i, j; |
| 87 | unsigned char *pi = line6pcm->prev_fbuf; |
| 88 | unsigned char *po = urb_out->transfer_buffer; |
| 89 | |
| 90 | for (i = 0; i < frames; ++i) { |
| 91 | for (j = 0; j < bytes_per_frame / 2; ++j) |
| 92 | po[j] = pi[j]; |
| 93 | |
| 94 | for (; j < bytes_per_frame; ++j) |
| 95 | po[j] = 0; |
| 96 | |
| 97 | pi += bytes_per_frame; |
| 98 | po += bytes_per_frame; |
| 99 | } |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 100 | } |
| 101 | if (--line6pcm->impulse_count <= 0) { |
| 102 | ((unsigned char *)(urb_out->transfer_buffer))[bytes_per_frame - |
| 103 | 1] = |
| 104 | line6pcm->impulse_volume; |
| 105 | line6pcm->impulse_count = line6pcm->impulse_period; |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 106 | } |
| 107 | } |
| 108 | |
| 109 | #endif |
| 110 | |
| 111 | /* |
| 112 | Add signal to buffer for software monitoring. |
| 113 | */ |
| 114 | static void add_monitor_signal(struct urb *urb_out, unsigned char *signal, |
| 115 | int volume, int bytes_per_frame) |
| 116 | { |
| 117 | if (volume == 0) |
| 118 | return; /* zero volume - no change */ |
| 119 | |
| 120 | if (bytes_per_frame == 4) { |
| 121 | short *pi, *po, *buf_end; |
Fabian Mewes | a6b4699 | 2014-03-24 23:46:31 +0100 | [diff] [blame] | 122 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 123 | pi = (short *)signal; |
| 124 | po = (short *)urb_out->transfer_buffer; |
| 125 | buf_end = po + urb_out->transfer_buffer_length / sizeof(*po); |
| 126 | |
| 127 | for (; po < buf_end; ++pi, ++po) |
| 128 | *po += (*pi * volume) >> 8; |
| 129 | } |
| 130 | |
| 131 | /* |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 132 | We don't need to handle devices with 6 bytes per frame here |
| 133 | since they all support hardware monitoring. |
| 134 | */ |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 135 | } |
| 136 | |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 137 | /* |
| 138 | Find a free URB, prepare audio data, and submit URB. |
| 139 | */ |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 140 | static int submit_audio_out_urb(struct snd_line6_pcm *line6pcm) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 141 | { |
| 142 | int index; |
| 143 | unsigned long flags; |
| 144 | int i, urb_size, urb_frames; |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 145 | int ret; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 146 | const int bytes_per_frame = line6pcm->properties->bytes_per_frame; |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 147 | const int frame_increment = |
| 148 | line6pcm->properties->snd_line6_rates.rats[0].num_min; |
| 149 | const int frame_factor = |
| 150 | line6pcm->properties->snd_line6_rates.rats[0].den * |
| 151 | (USB_INTERVALS_PER_SECOND / LINE6_ISO_INTERVAL); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 152 | struct urb *urb_out; |
| 153 | |
| 154 | spin_lock_irqsave(&line6pcm->lock_audio_out, flags); |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 155 | index = |
| 156 | find_first_zero_bit(&line6pcm->active_urb_out, LINE6_ISO_BUFFERS); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 157 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 158 | if (index < 0 || index >= LINE6_ISO_BUFFERS) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 159 | spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 160 | dev_err(line6pcm->line6->ifcdev, "no free URB found\n"); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 161 | return -EINVAL; |
| 162 | } |
| 163 | |
| 164 | urb_out = line6pcm->urb_audio_out[index]; |
| 165 | urb_size = 0; |
| 166 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 167 | for (i = 0; i < LINE6_ISO_PACKETS; ++i) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 168 | /* compute frame size for given sampling rate */ |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 169 | int fsize = 0; |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 170 | struct usb_iso_packet_descriptor *fout = |
| 171 | &urb_out->iso_frame_desc[i]; |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 172 | |
Markus Grabner | 0ca5488 | 2012-01-20 00:09:09 +0100 | [diff] [blame] | 173 | if (line6pcm->flags & LINE6_BITS_CAPTURE_STREAM) |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 174 | fsize = line6pcm->prev_fsize; |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 175 | |
| 176 | if (fsize == 0) { |
| 177 | int n; |
Fabian Mewes | a6b4699 | 2014-03-24 23:46:31 +0100 | [diff] [blame] | 178 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 179 | line6pcm->count_out += frame_increment; |
| 180 | n = line6pcm->count_out / frame_factor; |
| 181 | line6pcm->count_out -= n * frame_factor; |
| 182 | fsize = n * bytes_per_frame; |
| 183 | } |
| 184 | |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 185 | fout->offset = urb_size; |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 186 | fout->length = fsize; |
| 187 | urb_size += fsize; |
| 188 | } |
| 189 | |
| 190 | if (urb_size == 0) { |
| 191 | /* can't determine URB size */ |
| 192 | spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); |
Stefan Hajnoczi | 6a8ec87 | 2012-11-11 13:24:43 +0100 | [diff] [blame] | 193 | dev_err(line6pcm->line6->ifcdev, "driver bug: urb_size = 0\n"); |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 194 | return -EINVAL; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | urb_frames = urb_size / bytes_per_frame; |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 198 | urb_out->transfer_buffer = |
| 199 | line6pcm->buffer_out + |
Stefan Hajnoczi | 153e387 | 2011-12-10 02:12:29 +0100 | [diff] [blame] | 200 | index * LINE6_ISO_PACKETS * line6pcm->max_packet_size; |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 201 | urb_out->transfer_buffer_length = urb_size; |
| 202 | urb_out->context = line6pcm; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 203 | |
Markus Grabner | 0ca5488 | 2012-01-20 00:09:09 +0100 | [diff] [blame] | 204 | if (test_bit(LINE6_INDEX_PCM_ALSA_PLAYBACK_STREAM, &line6pcm->flags) && |
| 205 | !test_bit(LINE6_INDEX_PAUSE_PLAYBACK, &line6pcm->flags)) { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 206 | struct snd_pcm_runtime *runtime = |
| 207 | get_substream(line6pcm, SNDRV_PCM_STREAM_PLAYBACK)->runtime; |
| 208 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 209 | if (line6pcm->pos_out + urb_frames > runtime->buffer_size) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 210 | /* |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 211 | The transferred area goes over buffer boundary, |
| 212 | copy the data to the temp buffer. |
| 213 | */ |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 214 | int len; |
Fabian Mewes | a6b4699 | 2014-03-24 23:46:31 +0100 | [diff] [blame] | 215 | |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 216 | len = runtime->buffer_size - line6pcm->pos_out; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 217 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 218 | if (len > 0) { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 219 | memcpy(urb_out->transfer_buffer, |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 220 | runtime->dma_area + |
| 221 | line6pcm->pos_out * bytes_per_frame, |
| 222 | len * bytes_per_frame); |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 223 | memcpy(urb_out->transfer_buffer + |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 224 | len * bytes_per_frame, runtime->dma_area, |
| 225 | (urb_frames - len) * bytes_per_frame); |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 226 | } else |
Stefan Hajnoczi | 6a8ec87 | 2012-11-11 13:24:43 +0100 | [diff] [blame] | 227 | dev_err(line6pcm->line6->ifcdev, "driver bug: len = %d\n", |
| 228 | len); |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 229 | } else { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 230 | memcpy(urb_out->transfer_buffer, |
| 231 | runtime->dma_area + |
| 232 | line6pcm->pos_out * bytes_per_frame, |
| 233 | urb_out->transfer_buffer_length); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 234 | } |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 235 | |
Greg Kroah-Hartman | 027360c | 2010-09-21 16:58:00 -0700 | [diff] [blame] | 236 | line6pcm->pos_out += urb_frames; |
| 237 | if (line6pcm->pos_out >= runtime->buffer_size) |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 238 | line6pcm->pos_out -= runtime->buffer_size; |
| 239 | } else { |
| 240 | memset(urb_out->transfer_buffer, 0, |
| 241 | urb_out->transfer_buffer_length); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 242 | } |
| 243 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 244 | change_volume(urb_out, line6pcm->volume_playback, bytes_per_frame); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 245 | |
Peter Huewe | 597a1e7 | 2010-12-07 23:38:02 +0100 | [diff] [blame] | 246 | if (line6pcm->prev_fbuf != NULL) { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 247 | #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE |
Markus Grabner | 0ca5488 | 2012-01-20 00:09:09 +0100 | [diff] [blame] | 248 | if (line6pcm->flags & LINE6_BITS_PCM_IMPULSE) { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 249 | create_impulse_test_signal(line6pcm, urb_out, |
| 250 | bytes_per_frame); |
Ebru Akagunduz | 30bb0e7 | 2013-10-23 02:00:22 +0300 | [diff] [blame] | 251 | if (line6pcm->flags & |
| 252 | LINE6_BIT_PCM_ALSA_CAPTURE_STREAM) { |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 253 | line6_capture_copy(line6pcm, |
| 254 | urb_out->transfer_buffer, |
| 255 | urb_out-> |
| 256 | transfer_buffer_length); |
| 257 | line6_capture_check_period(line6pcm, |
Ebru Akagunduz | 30bb0e7 | 2013-10-23 02:00:22 +0300 | [diff] [blame] | 258 | urb_out->transfer_buffer_length); |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 259 | } |
| 260 | } else { |
| 261 | #endif |
| 262 | if (! |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 263 | (line6pcm->line6-> |
Chris Rorvick | 4cb1a4a | 2015-01-12 12:42:45 -0800 | [diff] [blame^] | 264 | properties->capabilities & LINE6_CAP_HWMON) |
Markus Grabner | 0ca5488 | 2012-01-20 00:09:09 +0100 | [diff] [blame] | 265 | && (line6pcm->flags & LINE6_BITS_PLAYBACK_STREAM) |
| 266 | && (line6pcm->flags & LINE6_BITS_CAPTURE_STREAM)) |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 267 | add_monitor_signal(urb_out, line6pcm->prev_fbuf, |
| 268 | line6pcm->volume_monitor, |
| 269 | bytes_per_frame); |
| 270 | #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE |
| 271 | } |
| 272 | #endif |
| 273 | } |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 274 | |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 275 | ret = usb_submit_urb(urb_out, GFP_ATOMIC); |
| 276 | |
| 277 | if (ret == 0) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 278 | set_bit(index, &line6pcm->active_urb_out); |
| 279 | else |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 280 | dev_err(line6pcm->line6->ifcdev, |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 281 | "URB out #%d submission failed (%d)\n", index, ret); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 282 | |
| 283 | spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); |
| 284 | return 0; |
| 285 | } |
| 286 | |
| 287 | /* |
| 288 | Submit all currently available playback URBs. |
| 289 | */ |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 290 | int line6_submit_audio_out_all_urbs(struct snd_line6_pcm *line6pcm) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 291 | { |
| 292 | int ret, i; |
| 293 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 294 | for (i = 0; i < LINE6_ISO_BUFFERS; ++i) { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 295 | ret = submit_audio_out_urb(line6pcm); |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 296 | if (ret < 0) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 297 | return ret; |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 298 | } |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 299 | |
| 300 | return 0; |
| 301 | } |
| 302 | |
| 303 | /* |
| 304 | Unlink all currently active playback URBs. |
| 305 | */ |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 306 | void line6_unlink_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 307 | { |
| 308 | unsigned int i; |
| 309 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 310 | for (i = LINE6_ISO_BUFFERS; i--;) { |
| 311 | if (test_bit(i, &line6pcm->active_urb_out)) { |
| 312 | if (!test_and_set_bit(i, &line6pcm->unlink_urb_out)) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 313 | struct urb *u = line6pcm->urb_audio_out[i]; |
Jerry Snitselaar | f3c5261 | 2014-04-24 00:31:48 -0700 | [diff] [blame] | 314 | |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 315 | usb_unlink_urb(u); |
| 316 | } |
| 317 | } |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | /* |
Stefan Hajnoczi | 6a8ec87 | 2012-11-11 13:24:43 +0100 | [diff] [blame] | 322 | Wait until unlinking of all currently active playback URBs has been |
| 323 | finished. |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 324 | */ |
Markus Grabner | 0ca5488 | 2012-01-20 00:09:09 +0100 | [diff] [blame] | 325 | void line6_wait_clear_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 326 | { |
| 327 | int timeout = HZ; |
| 328 | unsigned int i; |
| 329 | int alive; |
| 330 | |
| 331 | do { |
| 332 | alive = 0; |
| 333 | for (i = LINE6_ISO_BUFFERS; i--;) { |
| 334 | if (test_bit(i, &line6pcm->active_urb_out)) |
| 335 | alive++; |
| 336 | } |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 337 | if (!alive) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 338 | break; |
| 339 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 340 | schedule_timeout(1); |
| 341 | } while (--timeout > 0); |
| 342 | if (alive) |
| 343 | snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 344 | } |
| 345 | |
| 346 | /* |
| 347 | Unlink all currently active playback URBs, and wait for finishing. |
| 348 | */ |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 349 | void line6_unlink_wait_clear_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 350 | { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 351 | line6_unlink_audio_out_urbs(line6pcm); |
Markus Grabner | 0ca5488 | 2012-01-20 00:09:09 +0100 | [diff] [blame] | 352 | line6_wait_clear_audio_out_urbs(line6pcm); |
Markus Grabner | 6b02a17e | 2011-12-10 02:12:32 +0100 | [diff] [blame] | 353 | } |
| 354 | |
| 355 | void line6_free_playback_buffer(struct snd_line6_pcm *line6pcm) |
| 356 | { |
| 357 | kfree(line6pcm->buffer_out); |
| 358 | line6pcm->buffer_out = NULL; |
| 359 | } |
| 360 | |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 361 | /* |
| 362 | Callback for completed playback URB. |
| 363 | */ |
Greg Kroah-Hartman | 0c7ab15 | 2009-02-27 20:28:04 -0800 | [diff] [blame] | 364 | static void audio_out_callback(struct urb *urb) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 365 | { |
| 366 | int i, index, length = 0, shutdown = 0; |
| 367 | unsigned long flags; |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 368 | struct snd_line6_pcm *line6pcm = (struct snd_line6_pcm *)urb->context; |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 369 | struct snd_pcm_substream *substream = |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 370 | get_substream(line6pcm, SNDRV_PCM_STREAM_PLAYBACK); |
| 371 | |
| 372 | #if USE_CLEAR_BUFFER_WORKAROUND |
| 373 | memset(urb->transfer_buffer, 0, urb->transfer_buffer_length); |
| 374 | #endif |
| 375 | |
| 376 | line6pcm->last_frame_out = urb->start_frame; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 377 | |
| 378 | /* find index of URB */ |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 379 | for (index = LINE6_ISO_BUFFERS; index--;) |
| 380 | if (urb == line6pcm->urb_audio_out[index]) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 381 | break; |
| 382 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 383 | if (index < 0) |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 384 | return; /* URB has been unlinked asynchronously */ |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 385 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 386 | for (i = LINE6_ISO_PACKETS; i--;) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 387 | length += urb->iso_frame_desc[i].length; |
| 388 | |
| 389 | spin_lock_irqsave(&line6pcm->lock_audio_out, flags); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 390 | |
Markus Grabner | 0ca5488 | 2012-01-20 00:09:09 +0100 | [diff] [blame] | 391 | if (test_bit(LINE6_INDEX_PCM_ALSA_PLAYBACK_STREAM, &line6pcm->flags)) { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 392 | struct snd_pcm_runtime *runtime = substream->runtime; |
Jerry Snitselaar | f3c5261 | 2014-04-24 00:31:48 -0700 | [diff] [blame] | 393 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 394 | line6pcm->pos_out_done += |
| 395 | length / line6pcm->properties->bytes_per_frame; |
| 396 | |
| 397 | if (line6pcm->pos_out_done >= runtime->buffer_size) |
| 398 | line6pcm->pos_out_done -= runtime->buffer_size; |
| 399 | } |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 400 | |
| 401 | clear_bit(index, &line6pcm->active_urb_out); |
| 402 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 403 | for (i = LINE6_ISO_PACKETS; i--;) |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 404 | if (urb->iso_frame_desc[i].status == -EXDEV) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 405 | shutdown = 1; |
| 406 | break; |
| 407 | } |
| 408 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 409 | if (test_and_clear_bit(index, &line6pcm->unlink_urb_out)) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 410 | shutdown = 1; |
| 411 | |
| 412 | spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); |
| 413 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 414 | if (!shutdown) { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 415 | submit_audio_out_urb(line6pcm); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 416 | |
Stefan Hajnoczi | 6a8ec87 | 2012-11-11 13:24:43 +0100 | [diff] [blame] | 417 | if (test_bit(LINE6_INDEX_PCM_ALSA_PLAYBACK_STREAM, |
| 418 | &line6pcm->flags)) { |
Greg Kroah-Hartman | 027360c | 2010-09-21 16:58:00 -0700 | [diff] [blame] | 419 | line6pcm->bytes_out += length; |
| 420 | if (line6pcm->bytes_out >= line6pcm->period_out) { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 421 | line6pcm->bytes_out %= line6pcm->period_out; |
| 422 | snd_pcm_period_elapsed(substream); |
| 423 | } |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 424 | } |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | /* open playback callback */ |
| 429 | static int snd_line6_playback_open(struct snd_pcm_substream *substream) |
| 430 | { |
| 431 | int err; |
| 432 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 433 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
| 434 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 435 | err = snd_pcm_hw_constraint_ratdens(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 436 | (&line6pcm-> |
| 437 | properties->snd_line6_rates)); |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 438 | if (err < 0) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 439 | return err; |
| 440 | |
| 441 | runtime->hw = line6pcm->properties->snd_line6_playback_hw; |
| 442 | return 0; |
| 443 | } |
| 444 | |
| 445 | /* close playback callback */ |
| 446 | static int snd_line6_playback_close(struct snd_pcm_substream *substream) |
| 447 | { |
| 448 | return 0; |
| 449 | } |
| 450 | |
| 451 | /* hw_params playback callback */ |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 452 | static int snd_line6_playback_hw_params(struct snd_pcm_substream *substream, |
| 453 | struct snd_pcm_hw_params *hw_params) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 454 | { |
| 455 | int ret; |
| 456 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
| 457 | |
| 458 | /* -- Florian Demski [FD] */ |
| 459 | /* don't ask me why, but this fixes the bug on my machine */ |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 460 | if (line6pcm == NULL) { |
| 461 | if (substream->pcm == NULL) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 462 | return -ENOMEM; |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 463 | if (substream->pcm->private_data == NULL) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 464 | return -ENOMEM; |
| 465 | substream->private_data = substream->pcm->private_data; |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 466 | line6pcm = snd_pcm_substream_chip(substream); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 467 | } |
| 468 | /* -- [FD] end */ |
| 469 | |
Markus Grabner | 0ca5488 | 2012-01-20 00:09:09 +0100 | [diff] [blame] | 470 | ret = line6_pcm_acquire(line6pcm, LINE6_BIT_PCM_ALSA_PLAYBACK_BUFFER); |
Stefan Hajnoczi | 140e28b | 2011-11-23 08:20:45 +0000 | [diff] [blame] | 471 | |
Markus Grabner | 0ca5488 | 2012-01-20 00:09:09 +0100 | [diff] [blame] | 472 | if (ret < 0) |
| 473 | return ret; |
Stefan Hajnoczi | 140e28b | 2011-11-23 08:20:45 +0000 | [diff] [blame] | 474 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 475 | ret = snd_pcm_lib_malloc_pages(substream, |
| 476 | params_buffer_bytes(hw_params)); |
Markus Grabner | 0ca5488 | 2012-01-20 00:09:09 +0100 | [diff] [blame] | 477 | if (ret < 0) { |
| 478 | line6_pcm_release(line6pcm, LINE6_BIT_PCM_ALSA_PLAYBACK_BUFFER); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 479 | return ret; |
Markus Grabner | 0ca5488 | 2012-01-20 00:09:09 +0100 | [diff] [blame] | 480 | } |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 481 | |
| 482 | line6pcm->period_out = params_period_bytes(hw_params); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 483 | return 0; |
| 484 | } |
| 485 | |
| 486 | /* hw_free playback callback */ |
| 487 | static int snd_line6_playback_hw_free(struct snd_pcm_substream *substream) |
| 488 | { |
Stefan Hajnoczi | 140e28b | 2011-11-23 08:20:45 +0000 | [diff] [blame] | 489 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
Jerry Snitselaar | f3c5261 | 2014-04-24 00:31:48 -0700 | [diff] [blame] | 490 | |
Markus Grabner | 0ca5488 | 2012-01-20 00:09:09 +0100 | [diff] [blame] | 491 | line6_pcm_release(line6pcm, LINE6_BIT_PCM_ALSA_PLAYBACK_BUFFER); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 492 | return snd_pcm_lib_free_pages(substream); |
| 493 | } |
| 494 | |
| 495 | /* trigger playback callback */ |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 496 | int snd_line6_playback_trigger(struct snd_line6_pcm *line6pcm, int cmd) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 497 | { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 498 | int err; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 499 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 500 | switch (cmd) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 501 | case SNDRV_PCM_TRIGGER_START: |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 502 | #ifdef CONFIG_PM |
| 503 | case SNDRV_PCM_TRIGGER_RESUME: |
| 504 | #endif |
Stefan Hajnoczi | 6a8ec87 | 2012-11-11 13:24:43 +0100 | [diff] [blame] | 505 | err = line6_pcm_acquire(line6pcm, |
| 506 | LINE6_BIT_PCM_ALSA_PLAYBACK_STREAM); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 507 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 508 | if (err < 0) |
| 509 | return err; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 510 | |
| 511 | break; |
| 512 | |
| 513 | case SNDRV_PCM_TRIGGER_STOP: |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 514 | #ifdef CONFIG_PM |
| 515 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 516 | #endif |
Stefan Hajnoczi | 6a8ec87 | 2012-11-11 13:24:43 +0100 | [diff] [blame] | 517 | err = line6_pcm_release(line6pcm, |
| 518 | LINE6_BIT_PCM_ALSA_PLAYBACK_STREAM); |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 519 | |
| 520 | if (err < 0) |
| 521 | return err; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 522 | |
| 523 | break; |
| 524 | |
| 525 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
Markus Grabner | 0ca5488 | 2012-01-20 00:09:09 +0100 | [diff] [blame] | 526 | set_bit(LINE6_INDEX_PAUSE_PLAYBACK, &line6pcm->flags); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 527 | break; |
| 528 | |
| 529 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
Markus Grabner | 0ca5488 | 2012-01-20 00:09:09 +0100 | [diff] [blame] | 530 | clear_bit(LINE6_INDEX_PAUSE_PLAYBACK, &line6pcm->flags); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 531 | break; |
| 532 | |
| 533 | default: |
| 534 | return -EINVAL; |
| 535 | } |
| 536 | |
| 537 | return 0; |
| 538 | } |
| 539 | |
| 540 | /* playback pointer callback */ |
| 541 | static snd_pcm_uframes_t |
| 542 | snd_line6_playback_pointer(struct snd_pcm_substream *substream) |
| 543 | { |
| 544 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
Jerry Snitselaar | f3c5261 | 2014-04-24 00:31:48 -0700 | [diff] [blame] | 545 | |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 546 | return line6pcm->pos_out_done; |
| 547 | } |
| 548 | |
| 549 | /* playback operators */ |
| 550 | struct snd_pcm_ops snd_line6_playback_ops = { |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 551 | .open = snd_line6_playback_open, |
| 552 | .close = snd_line6_playback_close, |
| 553 | .ioctl = snd_pcm_lib_ioctl, |
| 554 | .hw_params = snd_line6_playback_hw_params, |
| 555 | .hw_free = snd_line6_playback_hw_free, |
| 556 | .prepare = snd_line6_prepare, |
| 557 | .trigger = snd_line6_trigger, |
| 558 | .pointer = snd_line6_playback_pointer, |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 559 | }; |
| 560 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 561 | int line6_create_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 562 | { |
| 563 | int i; |
| 564 | |
| 565 | /* create audio URBs and fill in constant values: */ |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 566 | for (i = 0; i < LINE6_ISO_BUFFERS; ++i) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 567 | struct urb *urb; |
| 568 | |
| 569 | /* URB for audio out: */ |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 570 | urb = line6pcm->urb_audio_out[i] = |
| 571 | usb_alloc_urb(LINE6_ISO_PACKETS, GFP_KERNEL); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 572 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 573 | if (urb == NULL) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 574 | dev_err(line6pcm->line6->ifcdev, "Out of memory\n"); |
| 575 | return -ENOMEM; |
| 576 | } |
| 577 | |
| 578 | urb->dev = line6pcm->line6->usbdev; |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 579 | urb->pipe = |
| 580 | usb_sndisocpipe(line6pcm->line6->usbdev, |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 581 | line6pcm->ep_audio_write & |
| 582 | USB_ENDPOINT_NUMBER_MASK); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 583 | urb->transfer_flags = URB_ISO_ASAP; |
| 584 | urb->start_frame = -1; |
| 585 | urb->number_of_packets = LINE6_ISO_PACKETS; |
| 586 | urb->interval = LINE6_ISO_INTERVAL; |
| 587 | urb->error_count = 0; |
| 588 | urb->complete = audio_out_callback; |
| 589 | } |
| 590 | |
| 591 | return 0; |
| 592 | } |