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
 22static struct snd_ratden podhd_ratden = {
 23	.num_min = 48000,
 24	.num_max = 48000,
 25	.num_step = 1,
 26	.den = 1,
 27};
 28
 29static 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*/
 80static 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*/
 92static 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*/
124int 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*/
138void 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}