aboutsummaryrefslogtreecommitdiff
path: root/sound/usb/usbmidi.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/usb/usbmidi.c')
-rw-r--r--sound/usb/usbmidi.c290
1 files changed, 194 insertions, 96 deletions
diff --git a/sound/usb/usbmidi.c b/sound/usb/usbmidi.c
index 2fb35cc22a3..0eff19ceb7e 100644
--- a/sound/usb/usbmidi.c
+++ b/sound/usb/usbmidi.c
@@ -45,6 +45,7 @@
#include <linux/slab.h>
#include <linux/timer.h>
#include <linux/usb.h>
+#include <linux/wait.h>
#include <sound/core.h>
#include <sound/rawmidi.h>
#include <sound/asequencer.h>
@@ -62,6 +63,9 @@
*/
#define ERROR_DELAY_JIFFIES (HZ / 10)
+#define OUTPUT_URBS 7
+#define INPUT_URBS 7
+
MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
MODULE_DESCRIPTION("USB Audio/MIDI helper module");
@@ -90,7 +94,7 @@ struct snd_usb_midi_endpoint;
struct usb_protocol_ops {
void (*input)(struct snd_usb_midi_in_endpoint*, uint8_t*, int);
- void (*output)(struct snd_usb_midi_out_endpoint*);
+ void (*output)(struct snd_usb_midi_out_endpoint *ep, struct urb *urb);
void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t);
void (*init_out_endpoint)(struct snd_usb_midi_out_endpoint*);
void (*finish_out_endpoint)(struct snd_usb_midi_out_endpoint*);
@@ -116,11 +120,15 @@ struct snd_usb_midi {
struct snd_usb_midi_out_endpoint {
struct snd_usb_midi* umidi;
- struct urb* urb;
- int urb_active;
+ struct out_urb_context {
+ struct urb *urb;
+ struct snd_usb_midi_out_endpoint *ep;
+ } urbs[OUTPUT_URBS];
+ unsigned int active_urbs;
+ unsigned int drain_urbs;
int max_transfer; /* size of urb buffer */
struct tasklet_struct tasklet;
-
+ unsigned int next_urb;
spinlock_t buffer_lock;
struct usbmidi_out_port {
@@ -139,11 +147,13 @@ struct snd_usb_midi_out_endpoint {
uint8_t data[2];
} ports[0x10];
int current_port;
+
+ wait_queue_head_t drain_wait;
};
struct snd_usb_midi_in_endpoint {
struct snd_usb_midi* umidi;
- struct urb* urb;
+ struct urb* urbs[INPUT_URBS];
struct usbmidi_in_port {
struct snd_rawmidi_substream *substream;
u8 running_status_length;
@@ -251,10 +261,17 @@ static void snd_usbmidi_in_urb_complete(struct urb* urb)
static void snd_usbmidi_out_urb_complete(struct urb* urb)
{
- struct snd_usb_midi_out_endpoint* ep = urb->context;
+ struct out_urb_context *context = urb->context;
+ struct snd_usb_midi_out_endpoint* ep = context->ep;
+ unsigned int urb_index;
spin_lock(&ep->buffer_lock);
- ep->urb_active = 0;
+ urb_index = context - ep->urbs;
+ ep->active_urbs &= ~(1 << urb_index);
+ if (unlikely(ep->drain_urbs)) {
+ ep->drain_urbs &= ~(1 << urb_index);
+ wake_up(&ep->drain_wait);
+ }
spin_unlock(&ep->buffer_lock);
if (urb->status < 0) {
int err = snd_usbmidi_urb_error(urb->status);
@@ -274,24 +291,38 @@ static void snd_usbmidi_out_urb_complete(struct urb* urb)
*/
static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint* ep)
{
- struct urb* urb = ep->urb;
+ unsigned int urb_index;
+ struct urb* urb;
unsigned long flags;
spin_lock_irqsave(&ep->buffer_lock, flags);
- if (ep->urb_active || ep->umidi->chip->shutdown) {
+ if (ep->umidi->chip->shutdown) {
spin_unlock_irqrestore(&ep->buffer_lock, flags);
return;
}
- urb->transfer_buffer_length = 0;
- ep->umidi->usb_protocol_ops->output(ep);
+ urb_index = ep->next_urb;
+ for (;;) {
+ if (!(ep->active_urbs & (1 << urb_index))) {
+ urb = ep->urbs[urb_index].urb;
+ urb->transfer_buffer_length = 0;
+ ep->umidi->usb_protocol_ops->output(ep, urb);
+ if (urb->transfer_buffer_length == 0)
+ break;
- if (urb->transfer_buffer_length > 0) {
- dump_urb("sending", urb->transfer_buffer,
- urb->transfer_buffer_length);
- urb->dev = ep->umidi->chip->dev;
- ep->urb_active = snd_usbmidi_submit_urb(urb, GFP_ATOMIC) >= 0;
+ dump_urb("sending", urb->transfer_buffer,
+ urb->transfer_buffer_length);
+ urb->dev = ep->umidi->chip->dev;
+ if (snd_usbmidi_submit_urb(urb, GFP_ATOMIC) < 0)
+ break;
+ ep->active_urbs |= 1 << urb_index;
+ }
+ if (++urb_index >= OUTPUT_URBS)
+ urb_index = 0;
+ if (urb_index == ep->next_urb)
+ break;
}
+ ep->next_urb = urb_index;
spin_unlock_irqrestore(&ep->buffer_lock, flags);
}
@@ -306,7 +337,7 @@ static void snd_usbmidi_out_tasklet(unsigned long data)
static void snd_usbmidi_error_timer(unsigned long data)
{
struct snd_usb_midi *umidi = (struct snd_usb_midi *)data;
- int i;
+ unsigned int i, j;
spin_lock(&umidi->disc_lock);
if (umidi->disconnected) {
@@ -317,8 +348,10 @@ static void snd_usbmidi_error_timer(unsigned long data)
struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in;
if (in && in->error_resubmit) {
in->error_resubmit = 0;
- in->urb->dev = umidi->chip->dev;
- snd_usbmidi_submit_urb(in->urb, GFP_ATOMIC);
+ for (j = 0; j < INPUT_URBS; ++j) {
+ in->urbs[j]->dev = umidi->chip->dev;
+ snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC);
+ }
}
if (umidi->endpoints[i].out)
snd_usbmidi_do_output(umidi->endpoints[i].out);
@@ -330,13 +363,14 @@ static void snd_usbmidi_error_timer(unsigned long data)
static int send_bulk_static_data(struct snd_usb_midi_out_endpoint* ep,
const void *data, int len)
{
- int err;
+ int err = 0;
void *buf = kmemdup(data, len, GFP_KERNEL);
if (!buf)
return -ENOMEM;
dump_urb("sending", buf, len);
- err = usb_bulk_msg(ep->umidi->chip->dev, ep->urb->pipe, buf, len,
- NULL, 250);
+ if (ep->urbs[0].urb)
+ err = usb_bulk_msg(ep->umidi->chip->dev, ep->urbs[0].urb->pipe,
+ buf, len, NULL, 250);
kfree(buf);
return err;
}
@@ -554,9 +588,9 @@ static void snd_usbmidi_transmit_byte(struct usbmidi_out_port* port,
}
}
-static void snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint* ep)
+static void snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint* ep,
+ struct urb *urb)
{
- struct urb* urb = ep->urb;
int p;
/* FIXME: lower-numbered ports can starve higher-numbered ports */
@@ -613,14 +647,15 @@ static void snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint* ep,
snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1);
}
-static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint* ep)
+static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint* ep,
+ struct urb *urb)
{
uint8_t* transfer_buffer;
int count;
if (!ep->ports[0].active)
return;
- transfer_buffer = ep->urb->transfer_buffer;
+ transfer_buffer = urb->transfer_buffer;
count = snd_rawmidi_transmit(ep->ports[0].substream,
&transfer_buffer[2],
ep->max_transfer - 2);
@@ -630,7 +665,7 @@ static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint* ep)
}
transfer_buffer[0] = 0;
transfer_buffer[1] = count;
- ep->urb->transfer_buffer_length = 2 + count;
+ urb->transfer_buffer_length = 2 + count;
}
static struct usb_protocol_ops snd_usbmidi_novation_ops = {
@@ -648,20 +683,21 @@ static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint* ep,
snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
}
-static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint* ep)
+static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint* ep,
+ struct urb *urb)
{
int count;
if (!ep->ports[0].active)
return;
count = snd_rawmidi_transmit(ep->ports[0].substream,
- ep->urb->transfer_buffer,
+ urb->transfer_buffer,
ep->max_transfer);
if (count < 1) {
ep->ports[0].active = 0;
return;
}
- ep->urb->transfer_buffer_length = count;
+ urb->transfer_buffer_length = count;
}
static struct usb_protocol_ops snd_usbmidi_raw_ops = {
@@ -681,23 +717,25 @@ static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep,
snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
}
-static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep)
+static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep,
+ struct urb *urb)
{
int count;
if (!ep->ports[0].active)
return;
- count = ep->urb->dev->speed == USB_SPEED_HIGH ? 1 : 2;
+ count = snd_usb_get_speed(ep->umidi->chip->dev) == USB_SPEED_HIGH
+ ? 1 : 2;
count = snd_rawmidi_transmit(ep->ports[0].substream,
- ep->urb->transfer_buffer,
+ urb->transfer_buffer,
count);
if (count < 1) {
ep->ports[0].active = 0;
return;
}
- memset(ep->urb->transfer_buffer + count, 0xFD, 9 - count);
- ep->urb->transfer_buffer_length = count;
+ memset(urb->transfer_buffer + count, 0xFD, 9 - count);
+ urb->transfer_buffer_length = count;
}
static struct usb_protocol_ops snd_usbmidi_122l_ops = {
@@ -786,10 +824,11 @@ static void snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint* ep,
}
}
-static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint* ep)
+static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint* ep,
+ struct urb *urb)
{
int port0 = ep->current_port;
- uint8_t* buf = ep->urb->transfer_buffer;
+ uint8_t* buf = urb->transfer_buffer;
int buf_free = ep->max_transfer;
int length, i;
@@ -829,7 +868,7 @@ static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint* ep)
*buf = 0xff;
--buf_free;
}
- ep->urb->transfer_buffer_length = ep->max_transfer - buf_free;
+ urb->transfer_buffer_length = ep->max_transfer - buf_free;
}
static struct usb_protocol_ops snd_usbmidi_emagic_ops = {
@@ -884,6 +923,35 @@ static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream,
}
}
+static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream)
+{
+ struct usbmidi_out_port* port = substream->runtime->private_data;
+ struct snd_usb_midi_out_endpoint *ep = port->ep;
+ unsigned int drain_urbs;
+ DEFINE_WAIT(wait);
+ long timeout = msecs_to_jiffies(50);
+
+ /*
+ * The substream buffer is empty, but some data might still be in the
+ * currently active URBs, so we have to wait for those to complete.
+ */
+ spin_lock_irq(&ep->buffer_lock);
+ drain_urbs = ep->active_urbs;
+ if (drain_urbs) {
+ ep->drain_urbs |= drain_urbs;
+ do {
+ prepare_to_wait(&ep->drain_wait, &wait,
+ TASK_UNINTERRUPTIBLE);
+ spin_unlock_irq(&ep->buffer_lock);
+ timeout = schedule_timeout(timeout);
+ spin_lock_irq(&ep->buffer_lock);
+ drain_urbs &= ep->drain_urbs;
+ } while (drain_urbs && timeout);
+ finish_wait(&ep->drain_wait, &wait);
+ }
+ spin_unlock_irq(&ep->buffer_lock);
+}
+
static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream)
{
return 0;
@@ -908,6 +976,7 @@ static struct snd_rawmidi_ops snd_usbmidi_output_ops = {
.open = snd_usbmidi_output_open,
.close = snd_usbmidi_output_close,
.trigger = snd_usbmidi_output_trigger,
+ .drain = snd_usbmidi_output_drain,
};
static struct snd_rawmidi_ops snd_usbmidi_input_ops = {
@@ -916,19 +985,26 @@ static struct snd_rawmidi_ops snd_usbmidi_input_ops = {
.trigger = snd_usbmidi_input_trigger
};
+static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb,
+ unsigned int buffer_length)
+{
+ usb_buffer_free(umidi->chip->dev, buffer_length,
+ urb->transfer_buffer, urb->transfer_dma);
+ usb_free_urb(urb);
+}
+
/*
* Frees an input endpoint.
* May be called when ep hasn't been initialized completely.
*/
static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint* ep)
{
- if (ep->urb) {
- usb_buffer_free(ep->umidi->chip->dev,
- ep->urb->transfer_buffer_length,
- ep->urb->transfer_buffer,
- ep->urb->transfer_dma);
- usb_free_urb(ep->urb);
- }
+ unsigned int i;
+
+ for (i = 0; i < INPUT_URBS; ++i)
+ if (ep->urbs[i])
+ free_urb_and_buffer(ep->umidi, ep->urbs[i],
+ ep->urbs[i]->transfer_buffer_length);
kfree(ep);
}
@@ -943,6 +1019,7 @@ static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi* umidi,
void* buffer;
unsigned int pipe;
int length;
+ unsigned int i;
rep->in = NULL;
ep = kzalloc(sizeof(*ep), GFP_KERNEL);
@@ -950,30 +1027,36 @@ static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi* umidi,
return -ENOMEM;
ep->umidi = umidi;
- ep->urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!ep->urb) {
- snd_usbmidi_in_endpoint_delete(ep);
- return -ENOMEM;
+ for (i = 0; i < INPUT_URBS; ++i) {
+ ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
+ if (!ep->urbs[i]) {
+ snd_usbmidi_in_endpoint_delete(ep);
+ return -ENOMEM;
+ }
}
if (ep_info->in_interval)
pipe = usb_rcvintpipe(umidi->chip->dev, ep_info->in_ep);
else
pipe = usb_rcvbulkpipe(umidi->chip->dev, ep_info->in_ep);
length = usb_maxpacket(umidi->chip->dev, pipe, 0);
- buffer = usb_buffer_alloc(umidi->chip->dev, length, GFP_KERNEL,
- &ep->urb->transfer_dma);
- if (!buffer) {
- snd_usbmidi_in_endpoint_delete(ep);
- return -ENOMEM;
+ for (i = 0; i < INPUT_URBS; ++i) {
+ buffer = usb_buffer_alloc(umidi->chip->dev, length, GFP_KERNEL,
+ &ep->urbs[i]->transfer_dma);
+ if (!buffer) {
+ snd_usbmidi_in_endpoint_delete(ep);
+ return -ENOMEM;
+ }
+ if (ep_info->in_interval)
+ usb_fill_int_urb(ep->urbs[i], umidi->chip->dev,
+ pipe, buffer, length,
+ snd_usbmidi_in_urb_complete,
+ ep, ep_info->in_interval);
+ else
+ usb_fill_bulk_urb(ep->urbs[i], umidi->chip->dev,
+ pipe, buffer, length,
+ snd_usbmidi_in_urb_complete, ep);
+ ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
}
- if (ep_info->in_interval)
- usb_fill_int_urb(ep->urb, umidi->chip->dev, pipe, buffer,
- length, snd_usbmidi_in_urb_complete, ep,
- ep_info->in_interval);
- else
- usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer,
- length, snd_usbmidi_in_urb_complete, ep);
- ep->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
rep->in = ep;
return 0;
@@ -994,12 +1077,12 @@ static unsigned int snd_usbmidi_count_bits(unsigned int x)
*/
static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint* ep)
{
- if (ep->urb) {
- usb_buffer_free(ep->umidi->chip->dev, ep->max_transfer,
- ep->urb->transfer_buffer,
- ep->urb->transfer_dma);
- usb_free_urb(ep->urb);
- }
+ unsigned int i;
+
+ for (i = 0; i < OUTPUT_URBS; ++i)
+ if (ep->urbs[i].urb)
+ free_urb_and_buffer(ep->umidi, ep->urbs[i].urb,
+ ep->max_transfer);
kfree(ep);
}
@@ -1011,7 +1094,7 @@ static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi* umidi,
struct snd_usb_midi_endpoint* rep)
{
struct snd_usb_midi_out_endpoint* ep;
- int i;
+ unsigned int i;
unsigned int pipe;
void* buffer;
@@ -1021,38 +1104,46 @@ static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi* umidi,
return -ENOMEM;
ep->umidi = umidi;
- ep->urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!ep->urb) {
- snd_usbmidi_out_endpoint_delete(ep);
- return -ENOMEM;
+ for (i = 0; i < OUTPUT_URBS; ++i) {
+ ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!ep->urbs[i].urb) {
+ snd_usbmidi_out_endpoint_delete(ep);
+ return -ENOMEM;
+ }
+ ep->urbs[i].ep = ep;
}
if (ep_info->out_interval)
pipe = usb_sndintpipe(umidi->chip->dev, ep_info->out_ep);
else
pipe = usb_sndbulkpipe(umidi->chip->dev, ep_info->out_ep);
if (umidi->chip->usb_id == USB_ID(0x0a92, 0x1020)) /* ESI M4U */
- /* FIXME: we need more URBs to get reasonable bandwidth here: */
ep->max_transfer = 4;
else
ep->max_transfer = usb_maxpacket(umidi->chip->dev, pipe, 1);
- buffer = usb_buffer_alloc(umidi->chip->dev, ep->max_transfer,
- GFP_KERNEL, &ep->urb->transfer_dma);
- if (!buffer) {
- snd_usbmidi_out_endpoint_delete(ep);
- return -ENOMEM;
+ for (i = 0; i < OUTPUT_URBS; ++i) {
+ buffer = usb_buffer_alloc(umidi->chip->dev,
+ ep->max_transfer, GFP_KERNEL,
+ &ep->urbs[i].urb->transfer_dma);
+ if (!buffer) {
+ snd_usbmidi_out_endpoint_delete(ep);
+ return -ENOMEM;
+ }
+ if (ep_info->out_interval)
+ usb_fill_int_urb(ep->urbs[i].urb, umidi->chip->dev,
+ pipe, buffer, ep->max_transfer,
+ snd_usbmidi_out_urb_complete,
+ &ep->urbs[i], ep_info->out_interval);
+ else
+ usb_fill_bulk_urb(ep->urbs[i].urb, umidi->chip->dev,
+ pipe, buffer, ep->max_transfer,
+ snd_usbmidi_out_urb_complete,
+ &ep->urbs[i]);
+ ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
}
- if (ep_info->out_interval)
- usb_fill_int_urb(ep->urb, umidi->chip->dev, pipe, buffer,
- ep->max_transfer, snd_usbmidi_out_urb_complete,
- ep, ep_info->out_interval);
- else
- usb_fill_bulk_urb(ep->urb, umidi->chip->dev,
- pipe, buffer, ep->max_transfer,
- snd_usbmidi_out_urb_complete, ep);
- ep->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
spin_lock_init(&ep->buffer_lock);
tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep);
+ init_waitqueue_head(&ep->drain_wait);
for (i = 0; i < 0x10; ++i)
if (ep_info->out_cables & (1 << i)) {
@@ -1090,7 +1181,7 @@ static void snd_usbmidi_free(struct snd_usb_midi* umidi)
void snd_usbmidi_disconnect(struct list_head* p)
{
struct snd_usb_midi* umidi;
- int i;
+ unsigned int i, j;
umidi = list_entry(p, struct snd_usb_midi, list);
/*
@@ -1105,13 +1196,15 @@ void snd_usbmidi_disconnect(struct list_head* p)
struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
if (ep->out)
tasklet_kill(&ep->out->tasklet);
- if (ep->out && ep->out->urb) {
- usb_kill_urb(ep->out->urb);
+ if (ep->out) {
+ for (j = 0; j < OUTPUT_URBS; ++j)
+ usb_kill_urb(ep->out->urbs[j].urb);
if (umidi->usb_protocol_ops->finish_out_endpoint)
umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
}
if (ep->in)
- usb_kill_urb(ep->in->urb);
+ for (j = 0; j < INPUT_URBS; ++j)
+ usb_kill_urb(ep->in->urbs[j]);
/* free endpoints here; later call can result in Oops */
if (ep->out) {
snd_usbmidi_out_endpoint_delete(ep->out);
@@ -1692,20 +1785,25 @@ static int snd_usbmidi_create_rawmidi(struct snd_usb_midi* umidi,
void snd_usbmidi_input_stop(struct list_head* p)
{
struct snd_usb_midi* umidi;
- int i;
+ unsigned int i, j;
umidi = list_entry(p, struct snd_usb_midi, list);
for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
if (ep->in)
- usb_kill_urb(ep->in->urb);
+ for (j = 0; j < INPUT_URBS; ++j)
+ usb_kill_urb(ep->in->urbs[j]);
}
}
static void snd_usbmidi_input_start_ep(struct snd_usb_midi_in_endpoint* ep)
{
- if (ep) {
- struct urb* urb = ep->urb;
+ unsigned int i;
+
+ if (!ep)
+ return;
+ for (i = 0; i < INPUT_URBS; ++i) {
+ struct urb* urb = ep->urbs[i];
urb->dev = ep->umidi->chip->dev;
snd_usbmidi_submit_urb(urb, GFP_KERNEL);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 22:06:04 +0000