Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Line6 Linux USB driver - 0.8.0 |
| 3 | * |
| 4 | * Copyright (C) 2004-2009 Markus Grabner (grabner@icg.tugraz.at) |
| 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 | |
| 12 | #include "driver.h" |
| 13 | |
| 14 | #include <sound/core.h> |
| 15 | #include <sound/pcm.h> |
| 16 | #include <sound/pcm_params.h> |
| 17 | |
| 18 | #include "audio.h" |
| 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 | |
| 23 | |
| 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) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 33 | return; /* maximum volume - no change */ |
| 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; |
| 37 | p = (short *)urb_out->transfer_buffer; |
| 38 | buf_end = p + urb_out->transfer_buffer_length / sizeof(*p); |
| 39 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 40 | for (; p < buf_end; ++p) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 41 | *p = (*p * volume[chn & 1]) >> 8; |
| 42 | ++chn; |
| 43 | } |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 44 | } else if (bytes_per_frame == 6) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 45 | unsigned char *p, *buf_end; |
| 46 | p = (unsigned char *)urb_out->transfer_buffer; |
| 47 | buf_end = p + urb_out->transfer_buffer_length; |
| 48 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 49 | for (; p < buf_end; p += 3) { |
| 50 | int val; |
| 51 | val = p[0] + (p[1] << 8) + ((signed char)p[2] << 16); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 52 | val = (val * volume[chn & 1]) >> 8; |
| 53 | p[0] = val; |
| 54 | p[1] = val >> 8; |
| 55 | p[2] = val >> 16; |
| 56 | ++chn; |
| 57 | } |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | /* |
| 62 | Find a free URB, prepare audio data, and submit URB. |
| 63 | */ |
| 64 | static int submit_audio_out_urb(struct snd_pcm_substream *substream) |
| 65 | { |
| 66 | int index; |
| 67 | unsigned long flags; |
| 68 | int i, urb_size, urb_frames; |
| 69 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
| 70 | const int bytes_per_frame = line6pcm->properties->bytes_per_frame; |
| 71 | const int frame_increment = line6pcm->properties->snd_line6_rates.rats[0].num_min; |
| 72 | const int frame_factor = line6pcm->properties->snd_line6_rates.rats[0].den * (USB_INTERVALS_PER_SECOND / LINE6_ISO_INTERVAL); |
| 73 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 74 | struct urb *urb_out; |
| 75 | |
| 76 | spin_lock_irqsave(&line6pcm->lock_audio_out, flags); |
| 77 | index = find_first_zero_bit(&line6pcm->active_urb_out, LINE6_ISO_BUFFERS); |
| 78 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 79 | if (index < 0 || index >= LINE6_ISO_BUFFERS) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 80 | spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); |
| 81 | dev_err(s2m(substream), "no free URB found\n"); |
| 82 | return -EINVAL; |
| 83 | } |
| 84 | |
| 85 | urb_out = line6pcm->urb_audio_out[index]; |
| 86 | urb_size = 0; |
| 87 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 88 | for (i = 0; i < LINE6_ISO_PACKETS; ++i) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 89 | /* compute frame size for given sampling rate */ |
| 90 | int n, fs; |
| 91 | struct usb_iso_packet_descriptor *fout = &urb_out->iso_frame_desc[i]; |
| 92 | line6pcm->count_out += frame_increment; |
| 93 | n = line6pcm->count_out / frame_factor; |
| 94 | line6pcm->count_out -= n * frame_factor; |
| 95 | fs = n * bytes_per_frame; |
| 96 | fout->offset = urb_size; |
| 97 | fout->length = fs; |
| 98 | urb_size += fs; |
| 99 | } |
| 100 | |
| 101 | urb_frames = urb_size / bytes_per_frame; |
| 102 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 103 | if (test_bit(BIT_PAUSE_PLAYBACK, &line6pcm->flags)) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 104 | urb_out->transfer_buffer = line6pcm->wrap_out; |
| 105 | memset(line6pcm->wrap_out, 0, urb_size); |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 106 | } else { |
| 107 | if (line6pcm->pos_out + urb_frames > runtime->buffer_size) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 108 | /* |
| 109 | The transferred area goes over buffer boundary, |
| 110 | copy the data to the temp buffer. |
| 111 | */ |
| 112 | int len; |
| 113 | len = runtime->buffer_size - line6pcm->pos_out; |
| 114 | urb_out->transfer_buffer = line6pcm->wrap_out; |
| 115 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 116 | if (len > 0) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 117 | memcpy(line6pcm->wrap_out, runtime->dma_area + line6pcm->pos_out * bytes_per_frame, len * bytes_per_frame); |
| 118 | memcpy(line6pcm->wrap_out + len * bytes_per_frame, runtime->dma_area, (urb_frames - len) * bytes_per_frame); |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 119 | } else |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 120 | dev_err(s2m(substream), "driver bug: len = %d\n", len); /* this is somewhat paranoid */ |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 121 | } else { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 122 | /* set the buffer pointer */ |
| 123 | urb_out->transfer_buffer = runtime->dma_area + line6pcm->pos_out * bytes_per_frame; |
| 124 | } |
| 125 | } |
| 126 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 127 | if ((line6pcm->pos_out += urb_frames) >= runtime->buffer_size) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 128 | line6pcm->pos_out -= runtime->buffer_size; |
| 129 | |
| 130 | urb_out->transfer_buffer_length = urb_size; |
| 131 | urb_out->context = substream; |
| 132 | change_volume(urb_out, line6pcm->volume, bytes_per_frame); |
| 133 | |
| 134 | #if DO_DUMP_PCM_SEND |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 135 | for (i = 0; i < LINE6_ISO_PACKETS; ++i) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 136 | struct usb_iso_packet_descriptor *fout = &urb_out->iso_frame_desc[i]; |
| 137 | line6_write_hexdump(line6pcm->line6, 'P', urb_out->transfer_buffer + fout->offset, fout->length); |
| 138 | } |
| 139 | #endif |
| 140 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 141 | if (usb_submit_urb(urb_out, GFP_ATOMIC) == 0) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 142 | set_bit(index, &line6pcm->active_urb_out); |
| 143 | else |
| 144 | dev_err(s2m(substream), "URB out #%d submission failed\n", index); |
| 145 | |
| 146 | spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | /* |
| 151 | Submit all currently available playback URBs. |
| 152 | */ |
| 153 | static int submit_audio_out_all_urbs(struct snd_pcm_substream *substream) |
| 154 | { |
| 155 | int ret, i; |
| 156 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 157 | for (i = 0; i < LINE6_ISO_BUFFERS; ++i) { |
| 158 | ret = submit_audio_out_urb(substream); |
| 159 | if (ret < 0) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 160 | return ret; |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 161 | } |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 162 | |
| 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | /* |
| 167 | Unlink all currently active playback URBs. |
| 168 | */ |
| 169 | static void unlink_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
| 170 | { |
| 171 | unsigned int i; |
| 172 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 173 | for (i = LINE6_ISO_BUFFERS; i--;) { |
| 174 | if (test_bit(i, &line6pcm->active_urb_out)) { |
| 175 | if (!test_and_set_bit(i, &line6pcm->unlink_urb_out)) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 176 | struct urb *u = line6pcm->urb_audio_out[i]; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 177 | usb_unlink_urb(u); |
| 178 | } |
| 179 | } |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | /* |
| 184 | Wait until unlinking of all currently active playback URBs has been finished. |
| 185 | */ |
| 186 | static void wait_clear_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
| 187 | { |
| 188 | int timeout = HZ; |
| 189 | unsigned int i; |
| 190 | int alive; |
| 191 | |
| 192 | do { |
| 193 | alive = 0; |
| 194 | for (i = LINE6_ISO_BUFFERS; i--;) { |
| 195 | if (test_bit(i, &line6pcm->active_urb_out)) |
| 196 | alive++; |
| 197 | } |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 198 | if (!alive) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 199 | break; |
| 200 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 201 | schedule_timeout(1); |
| 202 | } while (--timeout > 0); |
| 203 | if (alive) |
| 204 | snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive); |
| 205 | |
| 206 | line6pcm->active_urb_out = 0; |
| 207 | line6pcm->unlink_urb_out = 0; |
| 208 | } |
| 209 | |
| 210 | /* |
| 211 | Unlink all currently active playback URBs, and wait for finishing. |
| 212 | */ |
| 213 | void unlink_wait_clear_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
| 214 | { |
| 215 | unlink_audio_out_urbs(line6pcm); |
| 216 | wait_clear_audio_out_urbs(line6pcm); |
| 217 | } |
| 218 | |
| 219 | /* |
| 220 | Callback for completed playback URB. |
| 221 | */ |
Greg Kroah-Hartman | 0c7ab15 | 2009-02-27 20:28:04 -0800 | [diff] [blame] | 222 | static void audio_out_callback(struct urb *urb) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 223 | { |
| 224 | int i, index, length = 0, shutdown = 0; |
| 225 | unsigned long flags; |
| 226 | |
| 227 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)urb->context; |
| 228 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
| 229 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 230 | |
| 231 | /* find index of URB */ |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 232 | for (index = LINE6_ISO_BUFFERS; index--;) |
| 233 | if (urb == line6pcm->urb_audio_out[index]) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 234 | break; |
| 235 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 236 | if (index < 0) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 237 | return; /* URB has been unlinked asynchronously */ |
| 238 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 239 | for (i = LINE6_ISO_PACKETS; i--;) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 240 | length += urb->iso_frame_desc[i].length; |
| 241 | |
| 242 | spin_lock_irqsave(&line6pcm->lock_audio_out, flags); |
| 243 | line6pcm->pos_out_done += length / line6pcm->properties->bytes_per_frame; |
| 244 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 245 | if (line6pcm->pos_out_done >= runtime->buffer_size) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 246 | line6pcm->pos_out_done -= runtime->buffer_size; |
| 247 | |
| 248 | clear_bit(index, &line6pcm->active_urb_out); |
| 249 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 250 | for (i = LINE6_ISO_PACKETS; i--;) |
| 251 | if (urb->iso_frame_desc[i].status == -ESHUTDOWN) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 252 | shutdown = 1; |
| 253 | break; |
| 254 | } |
| 255 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 256 | if (test_bit(index, &line6pcm->unlink_urb_out)) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 257 | shutdown = 1; |
| 258 | |
| 259 | spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); |
| 260 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 261 | if (!shutdown) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 262 | submit_audio_out_urb(substream); |
| 263 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 264 | if ((line6pcm->bytes_out += length) >= line6pcm->period_out) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 265 | line6pcm->bytes_out -= line6pcm->period_out; |
| 266 | snd_pcm_period_elapsed(substream); |
| 267 | } |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | /* open playback callback */ |
| 272 | static int snd_line6_playback_open(struct snd_pcm_substream *substream) |
| 273 | { |
| 274 | int err; |
| 275 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 276 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
| 277 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 278 | err = snd_pcm_hw_constraint_ratdens(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
| 279 | (&line6pcm->properties->snd_line6_rates)); |
| 280 | if (err < 0) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 281 | return err; |
| 282 | |
| 283 | runtime->hw = line6pcm->properties->snd_line6_playback_hw; |
| 284 | return 0; |
| 285 | } |
| 286 | |
| 287 | /* close playback callback */ |
| 288 | static int snd_line6_playback_close(struct snd_pcm_substream *substream) |
| 289 | { |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | /* hw_params playback callback */ |
| 294 | static int snd_line6_playback_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) |
| 295 | { |
| 296 | int ret; |
| 297 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
| 298 | |
| 299 | /* -- Florian Demski [FD] */ |
| 300 | /* 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] | 301 | if (line6pcm == NULL) { |
| 302 | if (substream->pcm == NULL) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 303 | return -ENOMEM; |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 304 | if (substream->pcm->private_data == NULL) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 305 | return -ENOMEM; |
| 306 | substream->private_data = substream->pcm->private_data; |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 307 | line6pcm = snd_pcm_substream_chip(substream); |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 308 | } |
| 309 | /* -- [FD] end */ |
| 310 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 311 | ret = snd_pcm_lib_malloc_pages(substream, |
| 312 | params_buffer_bytes(hw_params)); |
| 313 | if (ret < 0) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 314 | return ret; |
| 315 | |
| 316 | line6pcm->period_out = params_period_bytes(hw_params); |
| 317 | line6pcm->wrap_out = kmalloc(2 * LINE6_ISO_PACKET_SIZE_MAX, GFP_KERNEL); |
| 318 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 319 | if (!line6pcm->wrap_out) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 320 | dev_err(s2m(substream), "cannot malloc wrap_out\n"); |
| 321 | return -ENOMEM; |
| 322 | } |
| 323 | |
| 324 | return 0; |
| 325 | } |
| 326 | |
| 327 | /* hw_free playback callback */ |
| 328 | static int snd_line6_playback_hw_free(struct snd_pcm_substream *substream) |
| 329 | { |
| 330 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
| 331 | unlink_wait_clear_audio_out_urbs(line6pcm); |
| 332 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 333 | kfree(line6pcm->wrap_out); |
| 334 | line6pcm->wrap_out = NULL; |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 335 | |
| 336 | return snd_pcm_lib_free_pages(substream); |
| 337 | } |
| 338 | |
| 339 | /* trigger playback callback */ |
| 340 | int snd_line6_playback_trigger(struct snd_pcm_substream *substream, int cmd) |
| 341 | { |
| 342 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
| 343 | int err; |
| 344 | line6pcm->count_out = 0; |
| 345 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 346 | switch (cmd) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 347 | case SNDRV_PCM_TRIGGER_START: |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 348 | if (!test_and_set_bit(BIT_RUNNING_PLAYBACK, &line6pcm->flags)) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 349 | err = submit_audio_out_all_urbs(substream); |
| 350 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 351 | if (err < 0) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 352 | clear_bit(BIT_RUNNING_PLAYBACK, &line6pcm->flags); |
| 353 | return err; |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | break; |
| 358 | |
| 359 | case SNDRV_PCM_TRIGGER_STOP: |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 360 | if (test_and_clear_bit(BIT_RUNNING_PLAYBACK, &line6pcm->flags)) |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 361 | unlink_audio_out_urbs(line6pcm); |
| 362 | |
| 363 | break; |
| 364 | |
| 365 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 366 | set_bit(BIT_PAUSE_PLAYBACK, &line6pcm->flags); |
| 367 | break; |
| 368 | |
| 369 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 370 | clear_bit(BIT_PAUSE_PLAYBACK, &line6pcm->flags); |
| 371 | break; |
| 372 | |
| 373 | default: |
| 374 | return -EINVAL; |
| 375 | } |
| 376 | |
| 377 | return 0; |
| 378 | } |
| 379 | |
| 380 | /* playback pointer callback */ |
| 381 | static snd_pcm_uframes_t |
| 382 | snd_line6_playback_pointer(struct snd_pcm_substream *substream) |
| 383 | { |
| 384 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
| 385 | return line6pcm->pos_out_done; |
| 386 | } |
| 387 | |
| 388 | /* playback operators */ |
| 389 | struct snd_pcm_ops snd_line6_playback_ops = { |
| 390 | .open = snd_line6_playback_open, |
| 391 | .close = snd_line6_playback_close, |
| 392 | .ioctl = snd_pcm_lib_ioctl, |
| 393 | .hw_params = snd_line6_playback_hw_params, |
| 394 | .hw_free = snd_line6_playback_hw_free, |
| 395 | .prepare = snd_line6_prepare, |
| 396 | .trigger = snd_line6_trigger, |
| 397 | .pointer = snd_line6_playback_pointer, |
| 398 | }; |
| 399 | |
| 400 | int create_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
| 401 | { |
| 402 | int i; |
| 403 | |
| 404 | /* create audio URBs and fill in constant values: */ |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 405 | for (i = 0; i < LINE6_ISO_BUFFERS; ++i) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 406 | struct urb *urb; |
| 407 | |
| 408 | /* URB for audio out: */ |
| 409 | urb = line6pcm->urb_audio_out[i] = usb_alloc_urb(LINE6_ISO_PACKETS, GFP_KERNEL); |
| 410 | |
Greg Kroah-Hartman | 010f378 | 2009-02-27 22:41:12 -0800 | [diff] [blame] | 411 | if (urb == NULL) { |
Markus Grabner | 705ecec | 2009-02-27 19:43:04 -0800 | [diff] [blame] | 412 | dev_err(line6pcm->line6->ifcdev, "Out of memory\n"); |
| 413 | return -ENOMEM; |
| 414 | } |
| 415 | |
| 416 | urb->dev = line6pcm->line6->usbdev; |
| 417 | urb->pipe = usb_sndisocpipe(line6pcm->line6->usbdev, line6pcm->ep_audio_write & USB_ENDPOINT_NUMBER_MASK); |
| 418 | urb->transfer_flags = URB_ISO_ASAP; |
| 419 | urb->start_frame = -1; |
| 420 | urb->number_of_packets = LINE6_ISO_PACKETS; |
| 421 | urb->interval = LINE6_ISO_INTERVAL; |
| 422 | urb->error_count = 0; |
| 423 | urb->complete = audio_out_callback; |
| 424 | } |
| 425 | |
| 426 | return 0; |
| 427 | } |