drivers/staging/line6/podhd.c

   1 /*
   2  * Line6 Pod HD
   3  *
   4  * Copyright (C) 2011 Stefan Hajnoczi <stefanha@gmail.com>
   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 <sound/core.h>
  13 #include <sound/pcm.h>
  14
  15 #include "audio.h"
  16 #include "driver.h"
  17 #include "pcm.h"
  18 #include "podhd.h"
  19
  20 #define PODHD_BYTES_PER_FRAME 6 /* 24bit audio (stereo) */
  21
  22 static struct snd_ratden podhd_ratden = {
  23         .num_min = 48000,
  24         .num_max = 48000,
  25         .num_step = 1,
  26         .den = 1,
  27 };
  28
  29 static struct line6_pcm_properties podhd_pcm_properties = {
  30         .snd_line6_playback_hw = {
  31                                   .info = (SNDRV_PCM_INFO_MMAP |
  32                                            SNDRV_PCM_INFO_INTERLEAVED |
  33                                            SNDRV_PCM_INFO_BLOCK_TRANSFER |
  34                                            SNDRV_PCM_INFO_MMAP_VALID |
  35                                            SNDRV_PCM_INFO_PAUSE |
  36 #ifdef CONFIG_PM
  37                                            SNDRV_PCM_INFO_RESUME |
  38 #endif
  39                                            SNDRV_PCM_INFO_SYNC_START),
  40                                   .formats = SNDRV_PCM_FMTBIT_S24_3LE,
  41                                   .rates = SNDRV_PCM_RATE_48000,
  42                                   .rate_min = 48000,
  43                                   .rate_max = 48000,
  44                                   .channels_min = 2,
  45                                   .channels_max = 2,
  46                                   .buffer_bytes_max = 60000,
  47                                   .period_bytes_min = 64,
  48                                   .period_bytes_max = 8192,
  49                                   .periods_min = 1,
  50                                   .periods_max = 1024},
  51         .snd_line6_capture_hw = {
  52                                  .info = (SNDRV_PCM_INFO_MMAP |
  53                                           SNDRV_PCM_INFO_INTERLEAVED |
  54                                           SNDRV_PCM_INFO_BLOCK_TRANSFER |
  55                                           SNDRV_PCM_INFO_MMAP_VALID |
  56 #ifdef CONFIG_PM
  57                                           SNDRV_PCM_INFO_RESUME |
  58 #endif
  59                                           SNDRV_PCM_INFO_SYNC_START),
  60                                  .formats = SNDRV_PCM_FMTBIT_S24_3LE,
  61                                  .rates = SNDRV_PCM_RATE_48000,
  62                                  .rate_min = 48000,
  63                                  .rate_max = 48000,
  64                                  .channels_min = 2,
  65                                  .channels_max = 2,
  66                                  .buffer_bytes_max = 60000,
  67                                  .period_bytes_min = 64,
  68                                  .period_bytes_max = 8192,
  69                                  .periods_min = 1,
  70                                  .periods_max = 1024},
  71         .snd_line6_rates = {
  72                             .nrats = 1,
  73                             .rats = &podhd_ratden},
  74         .bytes_per_frame = PODHD_BYTES_PER_FRAME
  75 };
  76
  77 /*
  78         POD HD destructor.
  79 */
  80 static void podhd_destruct(struct usb_interface *interface)
  81 {
  82         struct usb_line6_podhd *podhd = usb_get_intfdata(interface);
  83
  84         if (podhd == NULL)
  85                 return;
  86         line6_cleanup_audio(&podhd->line6);
  87 }
  88
  89 /*
  90         Try to init POD HD device.
  91 */
  92 static int podhd_try_init(struct usb_interface *interface,
  93                           struct usb_line6_podhd *podhd)
  94 {
  95         int err;
  96         struct usb_line6 *line6 = &podhd->line6;
  97
  98         if ((interface == NULL) || (podhd == NULL))
  99                 return -ENODEV;
 100
 101         /* initialize audio system: */
 102         err = line6_init_audio(line6);
 103         if (err < 0)
 104                 return err;
 105
 106         /* initialize MIDI subsystem: */
 107         err = line6_init_midi(line6);
 108         if (err < 0)
 109                 return err;
 110
 111         /* initialize PCM subsystem: */
 112         err = line6_init_pcm(line6, &podhd_pcm_properties);
 113         if (err < 0)
 114                 return err;
 115
 116         /* register USB audio system: */
 117         err = line6_register_audio(line6);
 118         return err;
 119 }
 120
 121 /*
 122         Init POD HD device (and clean up in case of failure).
 123 */
 124 int line6_podhd_init(struct usb_interface *interface,
 125                      struct usb_line6_podhd *podhd)
 126 {
 127         int err = podhd_try_init(interface, podhd);
 128
 129         if (err < 0)
 130                 podhd_destruct(interface);
 131
 132         return err;
 133 }
 134
 135 /*
 136         POD HD device disconnected.
 137 */
 138 void line6_podhd_disconnect(struct usb_interface *interface)
 139 {
 140         struct usb_line6_podhd *podhd;
 141
 142         if (interface == NULL)
 143                 return;
 144         podhd = usb_get_intfdata(interface);
 145
 146         if (podhd != NULL) {
 147                 struct snd_line6_pcm *line6pcm = podhd->line6.line6pcm;
 148
 149                 if (line6pcm != NULL)
 150                         line6_pcm_disconnect(line6pcm);
 151         }
 152
 153         podhd_destruct(interface);
 154 }