ALSA: firewire-digi00x: allow user space applications to read/write MIDI messages for all ports

At a commit c5fcee0373b3 ("ALSA: firewire-digi00x: add MIDI operations for
MIDI control port"), I described that MIDI messages for control surface is
transferred by a different way from the messages for physical ports.
However, this is wrong. MIDI messages to/from all of MIDI ports are
transferred by isochronous packets.

This commit removes codes to transfer MIDI messages via asynchronous
transaction, from MIDI handling layer.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 79 insertions, 129 deletions

diff --git a/sound/firewire/digi00x/digi00x-midi.c b/sound/firewire/digi00x/digi00x-midi.c
index 915d2a21223e..7ab3d0810f6b 100644
--- a/sound/firewire/digi00x/digi00x-midi.c
+++ b/sound/firewire/digi00x/digi00x-midi.c
@@ -8,7 +8,7 @@
 
 #include "digi00x.h"
 
-static int midi_phys_open(struct snd_rawmidi_substream *substream)
+static int midi_open(struct snd_rawmidi_substream *substream)
 {
         struct snd_dg00x *dg00x = substream->rmidi->private_data;
         int err;
@@ -27,7 +27,7 @@ static int midi_phys_open(struct snd_rawmidi_substream *substream)
         return err;
 }
 
-static int midi_phys_close(struct snd_rawmidi_substream *substream)
+static int midi_close(struct snd_rawmidi_substream *substream)
 {
         struct snd_dg00x *dg00x = substream->rmidi->private_data;
 
@@ -40,180 +40,130 @@ static int midi_phys_close(struct snd_rawmidi_substream *substream)
         return 0;
 }
 
-static void midi_phys_capture_trigger(struct snd_rawmidi_substream *substream,
-                                      int up)
+static void midi_capture_trigger(struct snd_rawmidi_substream *substream,
+                                 int up)
 {
         struct snd_dg00x *dg00x = substream->rmidi->private_data;
+        unsigned int port;
         unsigned long flags;
 
-        spin_lock_irqsave(&dg00x->lock, flags);
-
-        if (up)
-                amdtp_dot_midi_trigger(&dg00x->tx_stream, substream->number,
-                                       substream);
+        if (substream->rmidi->device == 0)
+                port = substream->number;
         else
-                amdtp_dot_midi_trigger(&dg00x->tx_stream, substream->number,
-                                       NULL);
-
-        spin_unlock_irqrestore(&dg00x->lock, flags);
-}
-
-static void midi_phys_playback_trigger(struct snd_rawmidi_substream *substream,
-                                       int up)
-{
-        struct snd_dg00x *dg00x = substream->rmidi->private_data;
-        unsigned long flags;
+                port = 2;
 
         spin_lock_irqsave(&dg00x->lock, flags);
 
         if (up)
-                amdtp_dot_midi_trigger(&dg00x->rx_stream, substream->number,
-                                       substream);
+                amdtp_dot_midi_trigger(&dg00x->tx_stream, port, substream);
         else
-                amdtp_dot_midi_trigger(&dg00x->rx_stream, substream->number,
-                                       NULL);
+                amdtp_dot_midi_trigger(&dg00x->tx_stream, port, NULL);
 
         spin_unlock_irqrestore(&dg00x->lock, flags);
 }
 
-static int midi_ctl_open(struct snd_rawmidi_substream *substream)
-{
-        /* Do nothing. */
-        return 0;
-}
-
-static int midi_ctl_capture_close(struct snd_rawmidi_substream *substream)
-{
-        /* Do nothing. */
-        return 0;
-}
-
-static int midi_ctl_playback_close(struct snd_rawmidi_substream *substream)
-{
-        struct snd_dg00x *dg00x = substream->rmidi->private_data;
-
-        snd_fw_async_midi_port_finish(&dg00x->out_control);
-
-        return 0;
-}
-
-static void midi_ctl_capture_trigger(struct snd_rawmidi_substream *substream,
-                                     int up)
+static void midi_playback_trigger(struct snd_rawmidi_substream *substream,
+                                  int up)
 {
         struct snd_dg00x *dg00x = substream->rmidi->private_data;
+        unsigned int port;
         unsigned long flags;
 
-        spin_lock_irqsave(&dg00x->lock, flags);
-
-        if (up)
-                dg00x->in_control = substream;
+        if (substream->rmidi->device == 0)
+                port = substream->number;
         else
-                dg00x->in_control = NULL;
-
-        spin_unlock_irqrestore(&dg00x->lock, flags);
-}
-
-static void midi_ctl_playback_trigger(struct snd_rawmidi_substream *substream,
-                                      int up)
-{
-        struct snd_dg00x *dg00x = substream->rmidi->private_data;
-        unsigned long flags;
+                port = 2;
 
         spin_lock_irqsave(&dg00x->lock, flags);
 
         if (up)
-                snd_fw_async_midi_port_run(&dg00x->out_control, substream);
+                amdtp_dot_midi_trigger(&dg00x->rx_stream, port, substream);
+        else
+                amdtp_dot_midi_trigger(&dg00x->rx_stream, port, NULL);
 
         spin_unlock_irqrestore(&dg00x->lock, flags);
 }
 
-static void set_midi_substream_names(struct snd_dg00x *dg00x,
-                                     struct snd_rawmidi_str *str,
-                                     bool is_ctl)
+static void set_substream_names(struct snd_dg00x *dg00x,
+                                struct snd_rawmidi *rmidi, bool is_console)
 {
         struct snd_rawmidi_substream *subs;
-
-        list_for_each_entry(subs, &str->substreams, list) {
-                if (!is_ctl)
-                        snprintf(subs->name, sizeof(subs->name),
-                                 "%s MIDI %d",
-                                 dg00x->card->shortname, subs->number + 1);
-                else
-                        /* This port is for asynchronous transaction. */
-                        snprintf(subs->name, sizeof(subs->name),
-                                 "%s control",
-                                 dg00x->card->shortname);
+        struct snd_rawmidi_str *str;
+        int i;
+
+        for (i = 0; i < 2; ++i) {
+                str = &rmidi->streams[i];
+
+                list_for_each_entry(subs, &str->substreams, list) {
+                        if (!is_console) {
+                                snprintf(subs->name, sizeof(subs->name),
+                                         "%s MIDI %d",
+                                         dg00x->card->shortname,
+                                         subs->number + 1);
+                        } else {
+                                snprintf(subs->name, sizeof(subs->name),
+                                         "%s control",
+                                         dg00x->card->shortname);
+                        }
+                }
         }
 }
 
-int snd_dg00x_create_midi_devices(struct snd_dg00x *dg00x)
+static int add_substream_pair(struct snd_dg00x *dg00x, unsigned int out_ports,
+                              unsigned int in_ports, bool is_console)
 {
-        static const struct snd_rawmidi_ops phys_capture_ops = {
-                .open           = midi_phys_open,
-                .close          = midi_phys_close,
-                .trigger        = midi_phys_capture_trigger,
-        };
-        static const struct snd_rawmidi_ops phys_playback_ops = {
-                .open           = midi_phys_open,
-                .close          = midi_phys_close,
-                .trigger        = midi_phys_playback_trigger,
+        static const struct snd_rawmidi_ops capture_ops = {
+                .open = midi_open,
+                .close = midi_close,
+                .trigger = midi_capture_trigger,
         };
-        static const struct snd_rawmidi_ops ctl_capture_ops = {
-                .open           = midi_ctl_open,
-                .close          = midi_ctl_capture_close,
-                .trigger        = midi_ctl_capture_trigger,
+        static const struct snd_rawmidi_ops playback_ops = {
+                .open = midi_open,
+                .close = midi_close,
+                .trigger = midi_playback_trigger,
         };
-        static const struct snd_rawmidi_ops ctl_playback_ops = {
-                .open           = midi_ctl_open,
-                .close          = midi_ctl_playback_close,
-                .trigger        = midi_ctl_playback_trigger,
-        };
-        struct snd_rawmidi *rmidi[2];
-        struct snd_rawmidi_str *str;
-        unsigned int i;
+        const char *label;
+        struct snd_rawmidi *rmidi;
         int err;
 
         /* Add physical midi ports. */
-        err = snd_rawmidi_new(dg00x->card, dg00x->card->driver, 0,
-                        DOT_MIDI_OUT_PORTS, DOT_MIDI_IN_PORTS, &rmidi[0]);
+        err = snd_rawmidi_new(dg00x->card, dg00x->card->driver, is_console,
+                              out_ports, in_ports, &rmidi);
         if (err < 0)
                 return err;
+        rmidi->private_data = dg00x;
 
-        snprintf(rmidi[0]->name, sizeof(rmidi[0]->name),
-                 "%s MIDI", dg00x->card->shortname);
-
-        snd_rawmidi_set_ops(rmidi[0], SNDRV_RAWMIDI_STREAM_INPUT,
-                            &phys_capture_ops);
-        snd_rawmidi_set_ops(rmidi[0], SNDRV_RAWMIDI_STREAM_OUTPUT,
-                            &phys_playback_ops);
+        if (!is_console)
+                label = "%s control";
+        else
+                label = "%s MIDI";
+        snprintf(rmidi->name, sizeof(rmidi->name), label,
+                 dg00x->card->shortname);
 
-        /* Add a pair of control midi ports. */
-        err = snd_rawmidi_new(dg00x->card, dg00x->card->driver, 1,
-                              1, 1, &rmidi[1]);
-        if (err < 0)
-                return err;
+        snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &playback_ops);
+        snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &capture_ops);
 
-        snprintf(rmidi[1]->name, sizeof(rmidi[1]->name),
-                 "%s control", dg00x->card->shortname);
+        rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT |
+                             SNDRV_RAWMIDI_INFO_OUTPUT |
+                             SNDRV_RAWMIDI_INFO_DUPLEX;
 
-        snd_rawmidi_set_ops(rmidi[1], SNDRV_RAWMIDI_STREAM_INPUT,
-                            &ctl_capture_ops);
-        snd_rawmidi_set_ops(rmidi[1], SNDRV_RAWMIDI_STREAM_OUTPUT,
-                            &ctl_playback_ops);
+        set_substream_names(dg00x, rmidi, is_console);
 
-        for (i = 0; i < ARRAY_SIZE(rmidi); i++) {
-                rmidi[i]->private_data = dg00x;
+        return 0;
+}
 
-                rmidi[i]->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
-                str = &rmidi[i]->streams[SNDRV_RAWMIDI_STREAM_INPUT];
-                set_midi_substream_names(dg00x, str, i);
+int snd_dg00x_create_midi_devices(struct snd_dg00x *dg00x)
+{
+        int err;
 
-                rmidi[i]->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
-                str = &rmidi[i]->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
-                set_midi_substream_names(dg00x, str, i);
+        /* Add physical midi ports. */
+        err = add_substream_pair(dg00x, DOT_MIDI_OUT_PORTS, DOT_MIDI_IN_PORTS,
+                                 false);
+        if (err < 0)
+                return err;
 
-                rmidi[i]->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
-        }
+        if (dg00x->is_console)
+                err = add_substream_pair(dg00x, 1, 1, true);
 
-        return 0;
+        return err;
 }