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ALSA: line6: Allow processing of raw incoming messages 

Not all PODs use MIDI via USB data interface, thus allow avoiding
that code and instead using direct processing.

Signed-off-by: Andrej Krutak <dev@andree.sk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
steinar/wifi_calib_4_9_kernel
Andrej Krutak 2016-09-18 20:59:27 +02:00 committed by Takashi Iwai
parent 174e1fc0bf
commit 7811a3ad18
3 changed files with 42 additions and 30 deletions
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61
sound/usb/line6/driver.c
View File

@ -290,26 +290,31 @@ static void line6_data_received(struct urb *urb)
if (urb->status == -ESHUTDOWN)
return;
done =
line6_midibuf_write(mb, urb->transfer_buffer, urb->actual_length);
if (done < urb->actual_length) {
line6_midibuf_ignore(mb, done);
dev_dbg(line6->ifcdev, "%d %d buffer overflow - message skipped\n",
done, urb->actual_length);
}
for (;;) {
if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
done =
line6_midibuf_read(mb, line6->buffer_message,
LINE6_MESSAGE_MAXLEN);
line6_midibuf_write(mb, urb->transfer_buffer, urb->actual_length);
if (done == 0)
break;
if (done < urb->actual_length) {
line6_midibuf_ignore(mb, done);
dev_dbg(line6->ifcdev, "%d %d buffer overflow - message skipped\n",
done, urb->actual_length);
}
line6->message_length = done;
line6_midi_receive(line6, line6->buffer_message, done);
for (;;) {
done =
line6_midibuf_read(mb, line6->buffer_message,
LINE6_MESSAGE_MAXLEN);
if (done == 0)
break;
line6->message_length = done;
line6_midi_receive(line6, line6->buffer_message, done);
if (line6->process_message)
line6->process_message(line6);
}
} else {
if (line6->process_message)
line6->process_message(line6);
}
@ -469,7 +474,9 @@ static void line6_destruct(struct snd_card *card)
struct usb_device *usbdev = line6->usbdev;
/* free buffer memory first: */
kfree(line6->buffer_message);
if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI)
kfree(line6->buffer_message);
kfree(line6->buffer_listen);
/* then free URBs: */
@ -515,7 +522,7 @@ static void line6_get_interval(struct usb_line6 *line6)
}
}
static int line6_init_cap_control_midi(struct usb_line6 *line6)
static int line6_init_cap_control(struct usb_line6 *line6)
{
int ret;
@ -524,14 +531,16 @@ static int line6_init_cap_control_midi(struct usb_line6 *line6)
if (!line6->buffer_listen)
return -ENOMEM;
line6->buffer_message = kmalloc(LINE6_MESSAGE_MAXLEN, GFP_KERNEL);
if (!line6->buffer_message)
return -ENOMEM;
line6->urb_listen = usb_alloc_urb(0, GFP_KERNEL);
if (!line6->urb_listen)
return -ENOMEM;
if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
line6->buffer_message = kmalloc(LINE6_MESSAGE_MAXLEN, GFP_KERNEL);
if (!line6->buffer_message)
return -ENOMEM;
}
ret = line6_start_listen(line6);
if (ret < 0) {
dev_err(line6->ifcdev, "cannot start listening: %d\n", ret);
@ -605,8 +614,8 @@ int line6_probe(struct usb_interface *interface,
line6_get_interval(line6);
if (properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
ret = line6_init_cap_control_midi(line6);
if (properties->capabilities & LINE6_CAP_CONTROL) {
ret = line6_init_cap_control(line6);
if (ret < 0)
goto error;
}
@ -676,7 +685,7 @@ int line6_suspend(struct usb_interface *interface, pm_message_t message)
snd_power_change_state(line6->card, SNDRV_CTL_POWER_D3hot);
if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI)
if (line6->properties->capabilities & LINE6_CAP_CONTROL)
line6_stop_listen(line6);
if (line6pcm != NULL) {
@ -695,7 +704,7 @@ int line6_resume(struct usb_interface *interface)
{
struct usb_line6 *line6 = usb_get_intfdata(interface);
if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI)
if (line6->properties->capabilities & LINE6_CAP_CONTROL)
line6_start_listen(line6);
snd_power_change_state(line6->card, SNDRV_CTL_POWER_D0);

9
sound/usb/line6/driver.h
View File

@ -147,15 +147,18 @@ struct usb_line6 {
/* URB for listening to POD data endpoint */
struct urb *urb_listen;
/* Buffer for listening to POD data endpoint */
/* Buffer for incoming data from POD data endpoint */
unsigned char *buffer_listen;
/* Buffer for message to be processed */
/* Buffer for message to be processed, generated from MIDI layer */
unsigned char *buffer_message;
/* Length of message to be processed */
/* Length of message to be processed, generated from MIDI layer */
int message_length;
/* If MIDI is supported, buffer_message contains the pre-processed data;
* otherwise the data is only in urb_listen (buffer_incoming).
*/
void (*process_message)(struct usb_line6 *);
void (*disconnect)(struct usb_line6 *line6);
};

2
sound/usb/line6/midi.c
View File

@ -258,7 +258,7 @@ int line6_init_midi(struct usb_line6 *line6)
struct snd_rawmidi *rmidi;
struct snd_line6_midi *line6midi;
if (!(line6->properties->capabilities & LINE6_CAP_CONTROL)) {
if (!(line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI)) {
/* skip MIDI initialization and report success */
return 0;
}