release/src-rt-6.x.4708/linux/linux-2.6.36/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 <linux/slab.h>
  15
  16 #include <sound/core.h>
  17 #include <sound/control.h>
  18 #include <sound/pcm.h>
  19 #include <sound/pcm_params.h>
  20
  21 #include "audio.h"
  22 #include "capture.h"
  23 #include "playback.h"
  24 #include "pod.h"
  25
  26
  27 /* trigger callback */
  28 int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd)
  29 {
  30         struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
  31         struct snd_pcm_substream *s;
  32         int err;
  33         unsigned long flags;
  34
  35         spin_lock_irqsave(&line6pcm->lock_trigger, flags);
  36         clear_bit(BIT_PREPARED, &line6pcm->flags);
  37
  38         snd_pcm_group_for_each_entry(s, substream) {
  39                 switch (s->stream) {
  40                 case SNDRV_PCM_STREAM_PLAYBACK:
  41                         err = snd_line6_playback_trigger(s, cmd);
  42
  43                         if (err < 0) {
  44                                 spin_unlock_irqrestore(&line6pcm->lock_trigger,
  45                                                        flags);
  46                                 return err;
  47                         }
  48
  49                         break;
  50
  51                 case SNDRV_PCM_STREAM_CAPTURE:
  52                         err = snd_line6_capture_trigger(s, cmd);
  53
  54                         if (err < 0) {
  55                                 spin_unlock_irqrestore(&line6pcm->lock_trigger,
  56                                                        flags);
  57                                 return err;
  58                         }
  59
  60                         break;
  61
  62                 default:
  63                         dev_err(s2m(substream), "Unknown stream direction %d\n",
  64                                 s->stream);
  65                 }
  66         }
  67
  68         spin_unlock_irqrestore(&line6pcm->lock_trigger, flags);
  69         return 0;
  70 }
  71
  72 /* control info callback */
  73 static int snd_line6_control_info(struct snd_kcontrol *kcontrol,
  74                                   struct snd_ctl_elem_info *uinfo)
  75 {
  76         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
  77         uinfo->count = 2;
  78         uinfo->value.integer.min = 0;
  79         uinfo->value.integer.max = 256;
  80         return 0;
  81 }
  82
  83 /* control get callback */
  84 static int snd_line6_control_get(struct snd_kcontrol *kcontrol,
  85                                  struct snd_ctl_elem_value *ucontrol)
  86 {
  87         int i;
  88         struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
  89
  90         for (i = 2; i--;)
  91                 ucontrol->value.integer.value[i] = line6pcm->volume[i];
  92
  93         return 0;
  94 }
  95
  96 /* control put callback */
  97 static int snd_line6_control_put(struct snd_kcontrol *kcontrol,
  98                                  struct snd_ctl_elem_value *ucontrol)
  99 {
 100         int i, changed = 0;
 101         struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
 102
 103         for (i = 2; i--;)
 104                 if (line6pcm->volume[i] != ucontrol->value.integer.value[i]) {
 105                         line6pcm->volume[i] = ucontrol->value.integer.value[i];
 106                         changed = 1;
 107                 }
 108
 109         return changed;
 110 }
 111
 112 /* control definition */
 113 static struct snd_kcontrol_new line6_control = {
 114         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 115         .name = "PCM Playback Volume",
 116         .index = 0,
 117         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 118         .info = snd_line6_control_info,
 119         .get = snd_line6_control_get,
 120         .put = snd_line6_control_put
 121 };
 122
 123 /*
 124         Cleanup the PCM device.
 125 */
 126 static void line6_cleanup_pcm(struct snd_pcm *pcm)
 127 {
 128         int i;
 129         struct snd_line6_pcm *line6pcm = snd_pcm_chip(pcm);
 130
 131         for (i = LINE6_ISO_BUFFERS; i--;) {
 132                 if (line6pcm->urb_audio_out[i]) {
 133                         usb_kill_urb(line6pcm->urb_audio_out[i]);
 134                         usb_free_urb(line6pcm->urb_audio_out[i]);
 135                 }
 136                 if (line6pcm->urb_audio_in[i]) {
 137                         usb_kill_urb(line6pcm->urb_audio_in[i]);
 138                         usb_free_urb(line6pcm->urb_audio_in[i]);
 139                 }
 140         }
 141 }
 142
 143 /* create a PCM device */
 144 static int snd_line6_new_pcm(struct snd_line6_pcm *line6pcm)
 145 {
 146         struct snd_pcm *pcm;
 147         int err;
 148
 149         err = snd_pcm_new(line6pcm->line6->card,
 150                          (char *)line6pcm->line6->properties->name,
 151                          0, 1, 1, &pcm);
 152         if (err < 0)
 153                 return err;
 154
 155         pcm->private_data = line6pcm;
 156         pcm->private_free = line6_cleanup_pcm;
 157         line6pcm->pcm = pcm;
 158         strcpy(pcm->name, line6pcm->line6->properties->name);
 159
 160         /* set operators */
 161         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 162                         &snd_line6_playback_ops);
 163         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_line6_capture_ops);
 164
 165         /* pre-allocation of buffers */
 166         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
 167                                         snd_dma_continuous_data(GFP_KERNEL),
 168                                         64 * 1024, 128 * 1024);
 169
 170         return 0;
 171 }
 172
 173 /* PCM device destructor */
 174 static int snd_line6_pcm_free(struct snd_device *device)
 175 {
 176         return 0;
 177 }
 178
 179 /*
 180         Create and register the PCM device and mixer entries.
 181         Create URBs for playback and capture.
 182 */
 183 int line6_init_pcm(struct usb_line6 *line6,
 184                    struct line6_pcm_properties *properties)
 185 {
 186         static struct snd_device_ops pcm_ops = {
 187                 .dev_free = snd_line6_pcm_free,
 188         };
 189
 190         int err;
 191         int ep_read = 0, ep_write = 0;
 192         struct snd_line6_pcm *line6pcm;
 193
 194         if (!(line6->properties->capabilities & LINE6_BIT_PCM))
 195                 return 0;  /* skip PCM initialization and report success */
 196
 197         /* initialize PCM subsystem based on product id: */
 198         switch (line6->product) {
 199         case LINE6_DEVID_BASSPODXT:
 200         case LINE6_DEVID_BASSPODXTLIVE:
 201         case LINE6_DEVID_BASSPODXTPRO:
 202         case LINE6_DEVID_PODXT:
 203         case LINE6_DEVID_PODXTLIVE:
 204         case LINE6_DEVID_PODXTPRO:
 205                 ep_read  = 0x82;
 206                 ep_write = 0x01;
 207                 break;
 208
 209         case LINE6_DEVID_PODX3:
 210         case LINE6_DEVID_PODX3LIVE:
 211                 ep_read  = 0x86;
 212                 ep_write = 0x02;
 213                 break;
 214
 215         case LINE6_DEVID_POCKETPOD:
 216                 ep_read  = 0x82;
 217                 ep_write = 0x02;
 218                 break;
 219
 220         case LINE6_DEVID_GUITARPORT:
 221         case LINE6_DEVID_TONEPORT_GX:
 222                 ep_read  = 0x82;
 223                 ep_write = 0x01;
 224                 break;
 225
 226         case LINE6_DEVID_TONEPORT_UX1:
 227                 ep_read  = 0x00;
 228                 ep_write = 0x00;
 229                 break;
 230
 231         case LINE6_DEVID_TONEPORT_UX2:
 232                 ep_read  = 0x87;
 233                 ep_write = 0x00;
 234                 break;
 235
 236         default:
 237                 MISSING_CASE;
 238         }
 239
 240         line6pcm = kzalloc(sizeof(struct snd_line6_pcm), GFP_KERNEL);
 241
 242         if (line6pcm == NULL)
 243                 return -ENOMEM;
 244
 245         line6pcm->volume[0] = line6pcm->volume[1] = 128;
 246         line6pcm->line6 = line6;
 247         line6pcm->ep_audio_read = ep_read;
 248         line6pcm->ep_audio_write = ep_write;
 249         line6pcm->max_packet_size = usb_maxpacket(line6->usbdev,
 250                                                  usb_rcvintpipe(line6->usbdev,
 251                                                                 ep_read),
 252                                                   0);
 253         line6pcm->properties = properties;
 254         line6->line6pcm = line6pcm;
 255
 256         /* PCM device: */
 257         err = snd_device_new(line6->card, SNDRV_DEV_PCM, line6, &pcm_ops);
 258         if (err < 0)
 259                 return err;
 260
 261         snd_card_set_dev(line6->card, line6->ifcdev);
 262
 263         err = snd_line6_new_pcm(line6pcm);
 264         if (err < 0)
 265                 return err;
 266
 267         spin_lock_init(&line6pcm->lock_audio_out);
 268         spin_lock_init(&line6pcm->lock_audio_in);
 269         spin_lock_init(&line6pcm->lock_trigger);
 270
 271         err = create_audio_out_urbs(line6pcm);
 272         if (err < 0)
 273                 return err;
 274
 275         err = create_audio_in_urbs(line6pcm);
 276         if (err < 0)
 277                 return err;
 278
 279         /* mixer: */
 280         err = snd_ctl_add(line6->card, snd_ctl_new1(&line6_control, line6pcm));
 281         if (err < 0)
 282                 return err;
 283
 284         return 0;
 285 }
 286
 287 /* prepare pcm callback */
 288 int snd_line6_prepare(struct snd_pcm_substream *substream)
 289 {
 290         struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
 291
 292         if (!test_and_set_bit(BIT_PREPARED, &line6pcm->flags)) {
 293                 unlink_wait_clear_audio_out_urbs(line6pcm);
 294                 line6pcm->pos_out = 0;
 295                 line6pcm->pos_out_done = 0;
 296
 297                 unlink_wait_clear_audio_in_urbs(line6pcm);
 298                 line6pcm->bytes_out = 0;
 299                 line6pcm->pos_in_done = 0;
 300                 line6pcm->bytes_in = 0;
 301         }
 302
 303         return 0;
 304 }