staging: line6: add Pod HD300 support
The Pod HD device family uses new MIDI SysEx messages and therefore
cannot reuse the existing Pod code. Instead of hardcoding Pod HD MIDI
messages into the driver, leave MIDI up to userspace. This driver
simply presents MIDI and pcm ALSA devices.
This device is similar to the Pod except that it has 48 kHz audio and
does not respond to Pod SysEx messages.
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/line6/podhd.c b/drivers/staging/line6/podhd.c
new file mode 100644
index 0000000..6c0f7f2
--- /dev/null
+++ b/drivers/staging/line6/podhd.c
@@ -0,0 +1,158 @@
+/*
+ * Line6 Pod HD
+ *
+ * Copyright (C) 2011 Stefan Hajnoczi <stefanha@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, version 2.
+ *
+ */
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+
+#include "audio.h"
+#include "driver.h"
+#include "pcm.h"
+#include "podhd.h"
+
+#define PODHD_BYTES_PER_FRAME 6 /* 24bit audio (stereo) */
+
+static struct snd_ratden podhd_ratden = {
+ .num_min = 48000,
+ .num_max = 48000,
+ .num_step = 1,
+ .den = 1,
+};
+
+static struct line6_pcm_properties podhd_pcm_properties = {
+ .snd_line6_playback_hw = {
+ .info = (SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_PAUSE |
+#ifdef CONFIG_PM
+ SNDRV_PCM_INFO_RESUME |
+#endif
+ SNDRV_PCM_INFO_SYNC_START),
+ .formats = SNDRV_PCM_FMTBIT_S24_3LE,
+ .rates = SNDRV_PCM_RATE_48000,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 2,
+ .buffer_bytes_max = 60000,
+ .period_bytes_min = 64,
+ .period_bytes_max = 8192,
+ .periods_min = 1,
+ .periods_max = 1024},
+ .snd_line6_capture_hw = {
+ .info = (SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP_VALID |
+#ifdef CONFIG_PM
+ SNDRV_PCM_INFO_RESUME |
+#endif
+ SNDRV_PCM_INFO_SYNC_START),
+ .formats = SNDRV_PCM_FMTBIT_S24_3LE,
+ .rates = SNDRV_PCM_RATE_48000,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 2,
+ .buffer_bytes_max = 60000,
+ .period_bytes_min = 64,
+ .period_bytes_max = 8192,
+ .periods_min = 1,
+ .periods_max = 1024},
+ .snd_line6_rates = {
+ .nrats = 1,
+ .rats = &podhd_ratden},
+ .bytes_per_frame = PODHD_BYTES_PER_FRAME
+};
+
+/*
+ POD HD destructor.
+*/
+static void podhd_destruct(struct usb_interface *interface)
+{
+ struct usb_line6_podhd *podhd = usb_get_intfdata(interface);
+ struct usb_line6 *line6;
+
+ if (podhd == NULL)
+ return;
+ line6 = &podhd->line6;
+ if (line6 == NULL)
+ return;
+ line6_cleanup_audio(line6);
+}
+
+/*
+ Try to init POD HD device.
+*/
+static int podhd_try_init(struct usb_interface *interface,
+ struct usb_line6_podhd *podhd)
+{
+ int err;
+ struct usb_line6 *line6 = &podhd->line6;
+
+ if ((interface == NULL) || (podhd == NULL))
+ return -ENODEV;
+
+ /* initialize audio system: */
+ err = line6_init_audio(line6);
+ if (err < 0)
+ return err;
+
+ /* initialize MIDI subsystem: */
+ err = line6_init_midi(line6);
+ if (err < 0)
+ return err;
+
+ /* initialize PCM subsystem: */
+ err = line6_init_pcm(line6, &podhd_pcm_properties);
+ if (err < 0)
+ return err;
+
+ /* register USB audio system: */
+ err = line6_register_audio(line6);
+ return err;
+}
+
+/*
+ Init POD HD device (and clean up in case of failure).
+*/
+int line6_podhd_init(struct usb_interface *interface,
+ struct usb_line6_podhd *podhd)
+{
+ int err = podhd_try_init(interface, podhd);
+
+ if (err < 0)
+ podhd_destruct(interface);
+
+ return err;
+}
+
+/*
+ POD HD device disconnected.
+*/
+void line6_podhd_disconnect(struct usb_interface *interface)
+{
+ struct usb_line6_podhd *podhd;
+
+ if (interface == NULL)
+ return;
+ podhd = usb_get_intfdata(interface);
+
+ if (podhd != NULL) {
+ struct snd_line6_pcm *line6pcm = podhd->line6.line6pcm;
+
+ if (line6pcm != NULL)
+ line6_pcm_disconnect(line6pcm);
+ }
+
+ podhd_destruct(interface);
+}