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 | |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 12 | #include <sound/core.h> |
| 13 | #include <sound/pcm.h> |
| 14 | #include <sound/pcm_params.h> |
| 15 | |
| 16 | #include "audio.h" |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 17 | #include "capture.h" |
| 18 | #include "driver.h" |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 19 | #include "pcm.h" |
| 20 | #include "pod.h" |
Greg Kroah-Hartman | b702ed25 | 2009-02-27 20:45:03 -0800 | [diff] [blame] | 21 | #include "playback.h" |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 22 | |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 23 | /* |
| 24 | Software stereo volume control. |
| 25 | */ |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 26 | static void change_volume(struct urb *urb_out, int volume[], |
| 27 | int bytes_per_frame) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 28 | { |
| 29 | int chn = 0; |
| 30 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 31 | if (volume[0] == 256 && volume[1] == 256) |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 32 | return; /* maximum volume - no change */ |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 33 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 34 | if (bytes_per_frame == 4) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 35 | short *p, *buf_end; |
| 36 | p = (short *)urb_out->transfer_buffer; |
| 37 | buf_end = p + urb_out->transfer_buffer_length / sizeof(*p); |
| 38 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 39 | for (; p < buf_end; ++p) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 40 | *p = (*p * volume[chn & 1]) >> 8; |
| 41 | ++chn; |
| 42 | } |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 43 | } else if (bytes_per_frame == 6) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 44 | unsigned char *p, *buf_end; |
| 45 | p = (unsigned char *)urb_out->transfer_buffer; |
| 46 | buf_end = p + urb_out->transfer_buffer_length; |
| 47 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 48 | for (; p < buf_end; p += 3) { |
| 49 | int val; |
| 50 | val = p[0] + (p[1] << 8) + ((signed char)p[2] << 16); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 51 | val = (val * volume[chn & 1]) >> 8; |
| 52 | p[0] = val; |
| 53 | p[1] = val >> 8; |
| 54 | p[2] = val >> 16; |
| 55 | ++chn; |
| 56 | } |
| 57 | } |
| 58 | } |
| 59 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 60 | #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE |
| 61 | |
| 62 | /* |
| 63 | Create signal for impulse response test. |
| 64 | */ |
| 65 | static void create_impulse_test_signal(struct snd_line6_pcm *line6pcm, |
| 66 | struct urb *urb_out, int bytes_per_frame) |
| 67 | { |
| 68 | int frames = urb_out->transfer_buffer_length / bytes_per_frame; |
| 69 | |
| 70 | if (bytes_per_frame == 4) { |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 71 | int i; |
| 72 | short *pi = (short *)line6pcm->prev_fbuf; |
| 73 | short *po = (short *)urb_out->transfer_buffer; |
| 74 | |
| 75 | for (i = 0; i < frames; ++i) { |
| 76 | po[0] = pi[0]; |
| 77 | po[1] = 0; |
| 78 | pi += 2; |
| 79 | po += 2; |
| 80 | } |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 81 | } else if (bytes_per_frame == 6) { |
| 82 | int i, j; |
| 83 | unsigned char *pi = line6pcm->prev_fbuf; |
| 84 | unsigned char *po = urb_out->transfer_buffer; |
| 85 | |
| 86 | for (i = 0; i < frames; ++i) { |
| 87 | for (j = 0; j < bytes_per_frame / 2; ++j) |
| 88 | po[j] = pi[j]; |
| 89 | |
| 90 | for (; j < bytes_per_frame; ++j) |
| 91 | po[j] = 0; |
| 92 | |
| 93 | pi += bytes_per_frame; |
| 94 | po += bytes_per_frame; |
| 95 | } |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 96 | } |
| 97 | if (--line6pcm->impulse_count <= 0) { |
| 98 | ((unsigned char *)(urb_out->transfer_buffer))[bytes_per_frame - |
| 99 | 1] = |
| 100 | line6pcm->impulse_volume; |
| 101 | line6pcm->impulse_count = line6pcm->impulse_period; |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 102 | } |
| 103 | } |
| 104 | |
| 105 | #endif |
| 106 | |
| 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; |
| 118 | pi = (short *)signal; |
| 119 | po = (short *)urb_out->transfer_buffer; |
| 120 | buf_end = po + urb_out->transfer_buffer_length / sizeof(*po); |
| 121 | |
| 122 | for (; po < buf_end; ++pi, ++po) |
| 123 | *po += (*pi * volume) >> 8; |
| 124 | } |
| 125 | |
| 126 | /* |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 127 | We don't need to handle devices with 6 bytes per frame here |
| 128 | since they all support hardware monitoring. |
| 129 | */ |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 130 | } |
| 131 | |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 132 | /* |
| 133 | Find a free URB, prepare audio data, and submit URB. |
| 134 | */ |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 135 | static int submit_audio_out_urb(struct snd_line6_pcm *line6pcm) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 136 | { |
| 137 | int index; |
| 138 | unsigned long flags; |
| 139 | int i, urb_size, urb_frames; |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 140 | int ret; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 141 | const int bytes_per_frame = line6pcm->properties->bytes_per_frame; |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 142 | const int frame_increment = |
| 143 | line6pcm->properties->snd_line6_rates.rats[0].num_min; |
| 144 | const int frame_factor = |
| 145 | line6pcm->properties->snd_line6_rates.rats[0].den * |
| 146 | (USB_INTERVALS_PER_SECOND / LINE6_ISO_INTERVAL); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 147 | struct urb *urb_out; |
| 148 | |
| 149 | spin_lock_irqsave(&line6pcm->lock_audio_out, flags); |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 150 | index = |
| 151 | find_first_zero_bit(&line6pcm->active_urb_out, LINE6_ISO_BUFFERS); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 152 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 153 | if (index < 0 || index >= LINE6_ISO_BUFFERS) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 154 | spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 155 | dev_err(line6pcm->line6->ifcdev, "no free URB found\n"); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 156 | return -EINVAL; |
| 157 | } |
| 158 | |
| 159 | urb_out = line6pcm->urb_audio_out[index]; |
| 160 | urb_size = 0; |
| 161 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 162 | for (i = 0; i < LINE6_ISO_PACKETS; ++i) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 163 | /* compute frame size for given sampling rate */ |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 164 | int fsize = 0; |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 165 | struct usb_iso_packet_descriptor *fout = |
| 166 | &urb_out->iso_frame_desc[i]; |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 167 | |
Greg Kroah-Hartman | 027360c | 2010-09-21 16:58:00 -0700 | [diff] [blame] | 168 | if (line6pcm->flags & MASK_CAPTURE) |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 169 | fsize = line6pcm->prev_fsize; |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 170 | |
| 171 | if (fsize == 0) { |
| 172 | int n; |
| 173 | line6pcm->count_out += frame_increment; |
| 174 | n = line6pcm->count_out / frame_factor; |
| 175 | line6pcm->count_out -= n * frame_factor; |
| 176 | fsize = n * bytes_per_frame; |
| 177 | } |
| 178 | |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 179 | fout->offset = urb_size; |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 180 | fout->length = fsize; |
| 181 | urb_size += fsize; |
| 182 | } |
| 183 | |
| 184 | if (urb_size == 0) { |
| 185 | /* can't determine URB size */ |
| 186 | spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); |
| 187 | dev_err(line6pcm->line6->ifcdev, "driver bug: urb_size = 0\n"); /* this is somewhat paranoid */ |
| 188 | return -EINVAL; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 189 | } |
| 190 | |
| 191 | urb_frames = urb_size / bytes_per_frame; |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 192 | urb_out->transfer_buffer = |
| 193 | line6pcm->buffer_out + |
| 194 | line6pcm->max_packet_size * line6pcm->index_out; |
| 195 | urb_out->transfer_buffer_length = urb_size; |
| 196 | urb_out->context = line6pcm; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 197 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 198 | if (++line6pcm->index_out == LINE6_ISO_BUFFERS) |
| 199 | line6pcm->index_out = 0; |
| 200 | |
| 201 | if (test_bit(BIT_PCM_ALSA_PLAYBACK, &line6pcm->flags) && |
| 202 | !test_bit(BIT_PAUSE_PLAYBACK, &line6pcm->flags)) { |
| 203 | struct snd_pcm_runtime *runtime = |
| 204 | get_substream(line6pcm, SNDRV_PCM_STREAM_PLAYBACK)->runtime; |
| 205 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 206 | if (line6pcm->pos_out + urb_frames > runtime->buffer_size) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 207 | /* |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 208 | The transferred area goes over buffer boundary, |
| 209 | copy the data to the temp buffer. |
| 210 | */ |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 211 | int len; |
| 212 | len = runtime->buffer_size - line6pcm->pos_out; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 213 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 214 | if (len > 0) { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 215 | memcpy(urb_out->transfer_buffer, |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 216 | runtime->dma_area + |
| 217 | line6pcm->pos_out * bytes_per_frame, |
| 218 | len * bytes_per_frame); |
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 | len * bytes_per_frame, runtime->dma_area, |
| 221 | (urb_frames - len) * bytes_per_frame); |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 222 | } else |
| 223 | dev_err(line6pcm->line6->ifcdev, "driver bug: len = %d\n", len); /* this is somewhat paranoid */ |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 224 | } else { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 225 | #if LINE6_REUSE_DMA_AREA_FOR_PLAYBACK |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 226 | /* set the buffer pointer */ |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 227 | urb_out->transfer_buffer = |
| 228 | runtime->dma_area + |
| 229 | line6pcm->pos_out * bytes_per_frame; |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 230 | #else |
| 231 | /* copy data */ |
| 232 | memcpy(urb_out->transfer_buffer, |
| 233 | runtime->dma_area + |
| 234 | line6pcm->pos_out * bytes_per_frame, |
| 235 | urb_out->transfer_buffer_length); |
| 236 | #endif |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 237 | } |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 238 | |
Greg Kroah-Hartman | 027360c | 2010-09-21 16:58:00 -0700 | [diff] [blame] | 239 | line6pcm->pos_out += urb_frames; |
| 240 | if (line6pcm->pos_out >= runtime->buffer_size) |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 241 | line6pcm->pos_out -= runtime->buffer_size; |
| 242 | } else { |
| 243 | memset(urb_out->transfer_buffer, 0, |
| 244 | urb_out->transfer_buffer_length); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 245 | } |
| 246 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 247 | change_volume(urb_out, line6pcm->volume_playback, bytes_per_frame); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 248 | |
Peter Huewe | 597a1e7 | 2010-12-07 23:38:02 +0100 | [diff] [blame^] | 249 | if (line6pcm->prev_fbuf != NULL) { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 250 | #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE |
| 251 | if (line6pcm->flags & MASK_PCM_IMPULSE) { |
| 252 | create_impulse_test_signal(line6pcm, urb_out, |
| 253 | bytes_per_frame); |
| 254 | if (line6pcm->flags & MASK_PCM_ALSA_CAPTURE) { |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 255 | line6_capture_copy(line6pcm, |
| 256 | urb_out->transfer_buffer, |
| 257 | urb_out-> |
| 258 | transfer_buffer_length); |
| 259 | line6_capture_check_period(line6pcm, |
| 260 | urb_out->transfer_buffer_length); |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 261 | } |
| 262 | } else { |
| 263 | #endif |
| 264 | if (! |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 265 | (line6pcm->line6-> |
| 266 | properties->capabilities & LINE6_BIT_HWMON) |
| 267 | && (line6pcm->flags & MASK_PLAYBACK) |
| 268 | && (line6pcm->flags & MASK_CAPTURE)) |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 269 | add_monitor_signal(urb_out, line6pcm->prev_fbuf, |
| 270 | line6pcm->volume_monitor, |
| 271 | bytes_per_frame); |
| 272 | #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE |
| 273 | } |
| 274 | #endif |
| 275 | } |
| 276 | #ifdef CONFIG_LINE6_USB_DUMP_PCM |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 277 | for (i = 0; i < LINE6_ISO_PACKETS; ++i) { |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 278 | struct usb_iso_packet_descriptor *fout = |
| 279 | &urb_out->iso_frame_desc[i]; |
| 280 | line6_write_hexdump(line6pcm->line6, 'P', |
| 281 | urb_out->transfer_buffer + fout->offset, |
| 282 | fout->length); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 283 | } |
| 284 | #endif |
| 285 | |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 286 | ret = usb_submit_urb(urb_out, GFP_ATOMIC); |
| 287 | |
| 288 | if (ret == 0) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 289 | set_bit(index, &line6pcm->active_urb_out); |
| 290 | else |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 291 | dev_err(line6pcm->line6->ifcdev, |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 292 | "URB out #%d submission failed (%d)\n", index, ret); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 293 | |
| 294 | spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); |
| 295 | return 0; |
| 296 | } |
| 297 | |
| 298 | /* |
| 299 | Submit all currently available playback URBs. |
| 300 | */ |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 301 | int line6_submit_audio_out_all_urbs(struct snd_line6_pcm *line6pcm) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 302 | { |
| 303 | int ret, i; |
| 304 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 305 | for (i = 0; i < LINE6_ISO_BUFFERS; ++i) { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 306 | ret = submit_audio_out_urb(line6pcm); |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 307 | if (ret < 0) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 308 | return ret; |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 309 | } |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 310 | |
| 311 | return 0; |
| 312 | } |
| 313 | |
| 314 | /* |
| 315 | Unlink all currently active playback URBs. |
| 316 | */ |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 317 | void line6_unlink_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 318 | { |
| 319 | unsigned int i; |
| 320 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 321 | for (i = LINE6_ISO_BUFFERS; i--;) { |
| 322 | if (test_bit(i, &line6pcm->active_urb_out)) { |
| 323 | if (!test_and_set_bit(i, &line6pcm->unlink_urb_out)) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 324 | struct urb *u = line6pcm->urb_audio_out[i]; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 325 | usb_unlink_urb(u); |
| 326 | } |
| 327 | } |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | /* |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 332 | Wait until unlinking of all currently active playback URBs has been finished. |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 333 | */ |
| 334 | static void wait_clear_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
| 335 | { |
| 336 | int timeout = HZ; |
| 337 | unsigned int i; |
| 338 | int alive; |
| 339 | |
| 340 | do { |
| 341 | alive = 0; |
| 342 | for (i = LINE6_ISO_BUFFERS; i--;) { |
| 343 | if (test_bit(i, &line6pcm->active_urb_out)) |
| 344 | alive++; |
| 345 | } |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 346 | if (!alive) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 347 | break; |
| 348 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 349 | schedule_timeout(1); |
| 350 | } while (--timeout > 0); |
| 351 | if (alive) |
| 352 | snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 353 | } |
| 354 | |
| 355 | /* |
| 356 | Unlink all currently active playback URBs, and wait for finishing. |
| 357 | */ |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 358 | 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] | 359 | { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 360 | line6_unlink_audio_out_urbs(line6pcm); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 361 | wait_clear_audio_out_urbs(line6pcm); |
| 362 | } |
| 363 | |
| 364 | /* |
| 365 | Callback for completed playback URB. |
| 366 | */ |
Greg Kroah-Hartman | 0c7ab15 | 2009-02-27 20:28:04 -0800 | [diff] [blame] | 367 | static void audio_out_callback(struct urb *urb) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 368 | { |
| 369 | int i, index, length = 0, shutdown = 0; |
| 370 | unsigned long flags; |
| 371 | |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 372 | struct snd_line6_pcm *line6pcm = (struct snd_line6_pcm *)urb->context; |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 373 | struct snd_pcm_substream *substream = |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 374 | get_substream(line6pcm, SNDRV_PCM_STREAM_PLAYBACK); |
| 375 | |
| 376 | #if USE_CLEAR_BUFFER_WORKAROUND |
| 377 | memset(urb->transfer_buffer, 0, urb->transfer_buffer_length); |
| 378 | #endif |
| 379 | |
| 380 | line6pcm->last_frame_out = urb->start_frame; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 381 | |
| 382 | /* find index of URB */ |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 383 | for (index = LINE6_ISO_BUFFERS; index--;) |
| 384 | if (urb == line6pcm->urb_audio_out[index]) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 385 | break; |
| 386 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 387 | if (index < 0) |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 388 | return; /* URB has been unlinked asynchronously */ |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 389 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 390 | for (i = LINE6_ISO_PACKETS; i--;) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 391 | length += urb->iso_frame_desc[i].length; |
| 392 | |
| 393 | spin_lock_irqsave(&line6pcm->lock_audio_out, flags); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 394 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 395 | if (test_bit(BIT_PCM_ALSA_PLAYBACK, &line6pcm->flags)) { |
| 396 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 397 | line6pcm->pos_out_done += |
| 398 | length / line6pcm->properties->bytes_per_frame; |
| 399 | |
| 400 | if (line6pcm->pos_out_done >= runtime->buffer_size) |
| 401 | line6pcm->pos_out_done -= runtime->buffer_size; |
| 402 | } |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 403 | |
| 404 | clear_bit(index, &line6pcm->active_urb_out); |
| 405 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 406 | for (i = LINE6_ISO_PACKETS; i--;) |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 407 | if (urb->iso_frame_desc[i].status == -EXDEV) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 408 | shutdown = 1; |
| 409 | break; |
| 410 | } |
| 411 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 412 | if (test_and_clear_bit(index, &line6pcm->unlink_urb_out)) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 413 | shutdown = 1; |
| 414 | |
| 415 | spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); |
| 416 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 417 | if (!shutdown) { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 418 | submit_audio_out_urb(line6pcm); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 419 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 420 | if (test_bit(BIT_PCM_ALSA_PLAYBACK, &line6pcm->flags)) { |
Greg Kroah-Hartman | 027360c | 2010-09-21 16:58:00 -0700 | [diff] [blame] | 421 | line6pcm->bytes_out += length; |
| 422 | if (line6pcm->bytes_out >= line6pcm->period_out) { |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 423 | line6pcm->bytes_out %= line6pcm->period_out; |
| 424 | snd_pcm_period_elapsed(substream); |
| 425 | } |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 426 | } |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | /* open playback callback */ |
| 431 | static int snd_line6_playback_open(struct snd_pcm_substream *substream) |
| 432 | { |
| 433 | int err; |
| 434 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 435 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
| 436 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 437 | 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] | 438 | (&line6pcm-> |
| 439 | properties->snd_line6_rates)); |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 440 | if (err < 0) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 441 | return err; |
| 442 | |
| 443 | runtime->hw = line6pcm->properties->snd_line6_playback_hw; |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | /* close playback callback */ |
| 448 | static int snd_line6_playback_close(struct snd_pcm_substream *substream) |
| 449 | { |
| 450 | return 0; |
| 451 | } |
| 452 | |
| 453 | /* hw_params playback callback */ |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 454 | static int snd_line6_playback_hw_params(struct snd_pcm_substream *substream, |
| 455 | struct snd_pcm_hw_params *hw_params) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 456 | { |
| 457 | int ret; |
| 458 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
| 459 | |
| 460 | /* -- Florian Demski [FD] */ |
| 461 | /* 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] | 462 | if (line6pcm == NULL) { |
| 463 | if (substream->pcm == NULL) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 464 | return -ENOMEM; |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 465 | if (substream->pcm->private_data == NULL) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 466 | return -ENOMEM; |
| 467 | substream->private_data = substream->pcm->private_data; |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 468 | line6pcm = snd_pcm_substream_chip(substream); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 469 | } |
| 470 | /* -- [FD] end */ |
| 471 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 472 | ret = snd_pcm_lib_malloc_pages(substream, |
| 473 | params_buffer_bytes(hw_params)); |
| 474 | if (ret < 0) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 475 | return ret; |
| 476 | |
| 477 | line6pcm->period_out = params_period_bytes(hw_params); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 478 | return 0; |
| 479 | } |
| 480 | |
| 481 | /* hw_free playback callback */ |
| 482 | static int snd_line6_playback_hw_free(struct snd_pcm_substream *substream) |
| 483 | { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 484 | return snd_pcm_lib_free_pages(substream); |
| 485 | } |
| 486 | |
| 487 | /* trigger playback callback */ |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 488 | int snd_line6_playback_trigger(struct snd_line6_pcm *line6pcm, int cmd) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 489 | { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 490 | int err; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 491 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 492 | switch (cmd) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 493 | case SNDRV_PCM_TRIGGER_START: |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 494 | #ifdef CONFIG_PM |
| 495 | case SNDRV_PCM_TRIGGER_RESUME: |
| 496 | #endif |
| 497 | err = line6_pcm_start(line6pcm, MASK_PCM_ALSA_PLAYBACK); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 498 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 499 | if (err < 0) |
| 500 | return err; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 501 | |
| 502 | break; |
| 503 | |
| 504 | case SNDRV_PCM_TRIGGER_STOP: |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 505 | #ifdef CONFIG_PM |
| 506 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 507 | #endif |
| 508 | err = line6_pcm_stop(line6pcm, MASK_PCM_ALSA_PLAYBACK); |
| 509 | |
| 510 | if (err < 0) |
| 511 | return err; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 512 | |
| 513 | break; |
| 514 | |
| 515 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 516 | set_bit(BIT_PAUSE_PLAYBACK, &line6pcm->flags); |
| 517 | break; |
| 518 | |
| 519 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 520 | clear_bit(BIT_PAUSE_PLAYBACK, &line6pcm->flags); |
| 521 | break; |
| 522 | |
| 523 | default: |
| 524 | return -EINVAL; |
| 525 | } |
| 526 | |
| 527 | return 0; |
| 528 | } |
| 529 | |
| 530 | /* playback pointer callback */ |
| 531 | static snd_pcm_uframes_t |
| 532 | snd_line6_playback_pointer(struct snd_pcm_substream *substream) |
| 533 | { |
| 534 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
| 535 | return line6pcm->pos_out_done; |
| 536 | } |
| 537 | |
| 538 | /* playback operators */ |
| 539 | struct snd_pcm_ops snd_line6_playback_ops = { |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 540 | .open = snd_line6_playback_open, |
| 541 | .close = snd_line6_playback_close, |
| 542 | .ioctl = snd_pcm_lib_ioctl, |
| 543 | .hw_params = snd_line6_playback_hw_params, |
| 544 | .hw_free = snd_line6_playback_hw_free, |
| 545 | .prepare = snd_line6_prepare, |
| 546 | .trigger = snd_line6_trigger, |
| 547 | .pointer = snd_line6_playback_pointer, |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 548 | }; |
| 549 | |
Markus Grabner | 1027f476 | 2010-08-12 01:35:30 +0200 | [diff] [blame] | 550 | int line6_create_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 551 | { |
| 552 | int i; |
| 553 | |
| 554 | /* create audio URBs and fill in constant values: */ |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 555 | for (i = 0; i < LINE6_ISO_BUFFERS; ++i) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 556 | struct urb *urb; |
| 557 | |
| 558 | /* URB for audio out: */ |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 559 | urb = line6pcm->urb_audio_out[i] = |
| 560 | usb_alloc_urb(LINE6_ISO_PACKETS, GFP_KERNEL); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 561 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 562 | if (urb == NULL) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 563 | dev_err(line6pcm->line6->ifcdev, "Out of memory\n"); |
| 564 | return -ENOMEM; |
| 565 | } |
| 566 | |
| 567 | urb->dev = line6pcm->line6->usbdev; |
Shawn Bohrer | 45af497 | 2009-11-15 22:17:50 -0600 | [diff] [blame] | 568 | urb->pipe = |
| 569 | usb_sndisocpipe(line6pcm->line6->usbdev, |
Markus Grabner | e1a164d | 2010-08-23 01:08:25 +0200 | [diff] [blame] | 570 | line6pcm->ep_audio_write & |
| 571 | USB_ENDPOINT_NUMBER_MASK); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 572 | urb->transfer_flags = URB_ISO_ASAP; |
| 573 | urb->start_frame = -1; |
| 574 | urb->number_of_packets = LINE6_ISO_PACKETS; |
| 575 | urb->interval = LINE6_ISO_INTERVAL; |
| 576 | urb->error_count = 0; |
| 577 | urb->complete = audio_out_callback; |
| 578 | } |
| 579 | |
| 580 | return 0; |
| 581 | } |