drivers/staging/line6/pcm.c

   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/control.h>
  16 #include <sound/pcm.h>
  17 #include <sound/pcm_params.h>
  18
  19 #include "audio.h"
  20 #include "capture.h"
  21 #include "playback.h"
  22 #include "pod.h"
  23
  24
  25 /* trigger callback */
  26 int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd)
  27 {
  28         struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
  29         struct snd_pcm_substream *s;
  30         int err;
  31         unsigned long flags;
  32
  33         spin_lock_irqsave(&line6pcm->lock_trigger, flags);
  34         clear_bit(BIT_PREPARED, &line6pcm->flags);
  35
  36         snd_pcm_group_for_each_entry(s, substream) {
  37                 switch(s->stream) {
  38                 case SNDRV_PCM_STREAM_PLAYBACK:
  39                         err = snd_line6_playback_trigger(s, cmd);
  40
  41                         if(err < 0) {
  42                                 spin_unlock_irqrestore(&line6pcm->lock_trigger, flags);
  43                                 return err;
  44                         }
  45
  46                         break;
  47
  48                 case SNDRV_PCM_STREAM_CAPTURE:
  49                         err = snd_line6_capture_trigger(s, cmd);
  50
  51                         if(err < 0) {
  52                                 spin_unlock_irqrestore(&line6pcm->lock_trigger, flags);
  53                                 return err;
  54                         }
  55
  56                         break;
  57
  58                 default:
  59                         dev_err(s2m(substream), "Unknown stream direction %d\n", s->stream);
  60                 }
  61         }
  62
  63         spin_unlock_irqrestore(&line6pcm->lock_trigger, flags);
  64         return 0;
  65 }
  66
  67 /* control info callback */
  68 static int snd_line6_control_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) {
  69         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
  70         uinfo->count = 2;
  71         uinfo->value.integer.min = 0;
  72         uinfo->value.integer.max = 256;
  73         return 0;
  74 }
  75
  76 /* control get callback */
  77 static int snd_line6_control_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) {
  78         int i;
  79         struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
  80
  81         for(i = 2; i--;)
  82                 ucontrol->value.integer.value[i] = line6pcm->volume[i];
  83
  84         return 0;
  85 }
  86
  87 /* control put callback */
  88 static int snd_line6_control_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) {
  89         int i, changed = 0;
  90         struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
  91
  92         for(i = 2; i--;)
  93                 if(line6pcm->volume[i] != ucontrol->value.integer.value[i]) {
  94                         line6pcm->volume[i] = ucontrol->value.integer.value[i];
  95                         changed = 1;
  96                 }
  97
  98         return changed;
  99 }
 100
 101 /* control definition */
 102 static struct snd_kcontrol_new line6_control = {
 103         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 104         .name = "PCM Playback Volume",
 105         .index = 0,
 106         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 107         .info = snd_line6_control_info,
 108         .get = snd_line6_control_get,
 109         .put = snd_line6_control_put
 110 };
 111
 112 /*
 113         Cleanup the PCM device.
 114 */
 115 static void line6_cleanup_pcm(struct snd_pcm *pcm)
 116 {
 117         int i;
 118         struct snd_line6_pcm *line6pcm = snd_pcm_chip(pcm);
 119
 120         for(i = LINE6_ISO_BUFFERS; i--;) {
 121                 if(line6pcm->urb_audio_out[i]) {
 122                         usb_kill_urb(line6pcm->urb_audio_out[i]);
 123                         usb_free_urb(line6pcm->urb_audio_out[i]);
 124                 }
 125                 if(line6pcm->urb_audio_in[i]) {
 126                         usb_kill_urb(line6pcm->urb_audio_in[i]);
 127                         usb_free_urb(line6pcm->urb_audio_in[i]);
 128                 }
 129         }
 130 }
 131
 132 /* create a PCM device */
 133 static int snd_line6_new_pcm(struct snd_line6_pcm *line6pcm)
 134 {
 135         struct snd_pcm *pcm;
 136         int err;
 137
 138         if((err = snd_pcm_new(line6pcm->line6->card, (char *)line6pcm->line6->properties->name, 0, 1, 1, &pcm)) < 0)
 139                 return err;
 140
 141         pcm->private_data = line6pcm;
 142         pcm->private_free = line6_cleanup_pcm;
 143         line6pcm->pcm = pcm;
 144         strcpy(pcm->name, line6pcm->line6->properties->name);
 145
 146         /* set operators */
 147         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_line6_playback_ops);
 148         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_line6_capture_ops);
 149
 150         /* pre-allocation of buffers */
 151         snd_pcm_lib_preallocate_pages_for_all(pcm,
 152                                                                                                                                                                 SNDRV_DMA_TYPE_CONTINUOUS,
 153                                                                                                                                                                 snd_dma_continuous_data(GFP_KERNEL),
 154                                                                                                                                                                 64 * 1024, 128 * 1024);
 155
 156         return 0;
 157 }
 158
 159 /* PCM device destructor */
 160 static int snd_line6_pcm_free(struct snd_device *device)
 161 {
 162         return 0;
 163 }
 164
 165 /*
 166         Create and register the PCM device and mixer entries.
 167         Create URBs for playback and capture.
 168 */
 169 int line6_init_pcm(struct usb_line6 *line6, struct line6_pcm_properties *properties)
 170 {
 171         static struct snd_device_ops pcm_ops = {
 172                 .dev_free = snd_line6_pcm_free,
 173         };
 174
 175         int err;
 176         int ep_read = 0, ep_write = 0;
 177         struct snd_line6_pcm *line6pcm;
 178
 179         if(!(line6->properties->capabilities & LINE6_BIT_PCM))
 180                 return 0;  /* skip PCM initialization and report success */
 181
 182         /* initialize PCM subsystem based on product id: */
 183         switch(line6->product) {
 184         case LINE6_DEVID_BASSPODXT:
 185   case LINE6_DEVID_BASSPODXTLIVE:
 186   case LINE6_DEVID_BASSPODXTPRO:
 187   case LINE6_DEVID_PODXT:
 188   case LINE6_DEVID_PODXTLIVE:
 189   case LINE6_DEVID_PODXTPRO:
 190                 ep_read  = 0x82;
 191                 ep_write = 0x01;
 192                 break;
 193
 194   case LINE6_DEVID_PODX3:
 195   case LINE6_DEVID_PODX3LIVE:
 196                 ep_read  = 0x86;
 197                 ep_write = 0x02;
 198                 break;
 199
 200   case LINE6_DEVID_POCKETPOD:
 201                 ep_read  = 0x82;
 202                 ep_write = 0x02;
 203                 break;
 204
 205     case LINE6_DEVID_GUITARPORT:
 206         case LINE6_DEVID_TONEPORT_GX:
 207                 ep_read  = 0x82;
 208                 ep_write = 0x01;
 209                 break;
 210
 211         case LINE6_DEVID_TONEPORT_UX1:
 212                 ep_read  = 0x00;
 213                 ep_write = 0x00;
 214                 break;
 215
 216         case LINE6_DEVID_TONEPORT_UX2:
 217                 ep_read  = 0x87;
 218                 ep_write = 0x00;
 219                 break;
 220
 221         default:
 222                 MISSING_CASE;
 223         }
 224
 225         line6pcm = kzalloc(sizeof(struct snd_line6_pcm), GFP_KERNEL);
 226
 227         if(line6pcm == NULL)
 228                 return -ENOMEM;
 229
 230         line6pcm->volume[0] = line6pcm->volume[1] = 128;
 231         line6pcm->line6 = line6;
 232         line6pcm->ep_audio_read = ep_read;
 233         line6pcm->ep_audio_write = ep_write;
 234         line6pcm->max_packet_size = usb_maxpacket(line6->usbdev, usb_rcvintpipe(line6->usbdev, ep_read), 0);
 235         line6pcm->properties = properties;
 236         line6->line6pcm = line6pcm;
 237
 238         /* PCM device: */
 239         if((err = snd_device_new(line6->card, SNDRV_DEV_PCM, line6, &pcm_ops)) < 0)
 240                 return err;
 241
 242         snd_card_set_dev(line6->card, line6->ifcdev);
 243
 244         if((err = snd_line6_new_pcm(line6pcm)) < 0)
 245                 return err;
 246
 247         spin_lock_init(&line6pcm->lock_audio_out);
 248         spin_lock_init(&line6pcm->lock_audio_in);
 249         spin_lock_init(&line6pcm->lock_trigger);
 250
 251         if((err = create_audio_out_urbs(line6pcm)) < 0)
 252                 return err;
 253
 254         if((err = create_audio_in_urbs(line6pcm)) < 0)
 255                 return err;
 256
 257         /* mixer: */
 258         if((err = snd_ctl_add(line6->card, snd_ctl_new1(&line6_control, line6pcm))) < 0)
 259                 return err;
 260
 261         return 0;
 262 }
 263
 264 /* prepare pcm callback */
 265 int snd_line6_prepare(struct snd_pcm_substream *substream)
 266 {
 267         struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
 268
 269         if(!test_and_set_bit(BIT_PREPARED, &line6pcm->flags)) {
 270                 unlink_wait_clear_audio_out_urbs(line6pcm);
 271                 line6pcm->pos_out = 0;
 272                 line6pcm->pos_out_done = 0;
 273
 274                 unlink_wait_clear_audio_in_urbs(line6pcm);
 275                 line6pcm->bytes_out = 0;
 276                 line6pcm->pos_in_done = 0;
 277                 line6pcm->bytes_in = 0;
 278         }
 279
 280         return 0;
 281 }