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linux/sound/usb/midi2.c

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ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* MIDI 2.0 support
*/
#include <linux/bitops.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/wait.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/usb/audio.h>
#include <linux/usb/midi.h>
#include <linux/usb/midi-v2.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/ump.h>
#include "usbaudio.h"
#include "midi.h"
#include "midi2.h"
#include "helper.h"
static bool midi2_enable = true;
module_param(midi2_enable, bool, 0444);
MODULE_PARM_DESC(midi2_enable, "Enable MIDI 2.0 support.");
ALSA: usb-audio: Add midi2_ump_probe option Add a new option to enable/disable the UMP Endpoint probing. Some firmware seems screwed up when such a new command issued, and this option allows user to suppress it. Link: https://lore.kernel.org/r/20230612081054.17200-5-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-06-12 08:10:48 +00:00
static bool midi2_ump_probe = true;
module_param(midi2_ump_probe, bool, 0444);
MODULE_PARM_DESC(midi2_ump_probe, "Probe UMP v1.1 support at first.");
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
/* stream direction; just shorter names */
enum {
STR_OUT = SNDRV_RAWMIDI_STREAM_OUTPUT,
STR_IN = SNDRV_RAWMIDI_STREAM_INPUT
};
#define NUM_URBS 8
struct snd_usb_midi2_urb;
struct snd_usb_midi2_endpoint;
struct snd_usb_midi2_ump;
struct snd_usb_midi2_interface;
/* URB context */
struct snd_usb_midi2_urb {
struct urb *urb;
struct snd_usb_midi2_endpoint *ep;
unsigned int index; /* array index */
};
/* A USB MIDI input/output endpoint */
struct snd_usb_midi2_endpoint {
struct usb_device *dev;
const struct usb_ms20_endpoint_descriptor *ms_ep; /* reference to EP descriptor */
struct snd_usb_midi2_endpoint *pair; /* bidirectional pair EP */
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
struct snd_usb_midi2_ump *rmidi; /* assigned UMP EP pair */
struct snd_ump_endpoint *ump; /* assigned UMP EP */
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
int direction; /* direction (STR_IN/OUT) */
unsigned int endpoint; /* EP number */
unsigned int pipe; /* URB pipe */
unsigned int packets; /* packet buffer size in bytes */
unsigned int interval; /* interval for INT EP */
wait_queue_head_t wait; /* URB waiter */
spinlock_t lock; /* URB locking */
struct snd_rawmidi_substream *substream; /* NULL when closed */
unsigned int num_urbs; /* number of allocated URBs */
unsigned long urb_free; /* bitmap for free URBs */
unsigned long urb_free_mask; /* bitmask for free URBs */
atomic_t running; /* running status */
atomic_t suspended; /* saved running status for suspend */
bool disconnected; /* shadow of umidi->disconnected */
struct list_head list; /* list to umidi->ep_list */
struct snd_usb_midi2_urb urbs[NUM_URBS];
};
/* A UMP endpoint - one or two USB MIDI endpoints are assigned */
struct snd_usb_midi2_ump {
struct usb_device *dev;
struct snd_usb_midi2_interface *umidi; /* reference to MIDI iface */
struct snd_ump_endpoint *ump; /* assigned UMP EP object */
struct snd_usb_midi2_endpoint *eps[2]; /* USB MIDI endpoints */
int index; /* rawmidi device index */
unsigned char usb_block_id; /* USB GTB id used for finding a pair */
ALSA: usb-audio: Parse UMP Endpoint and Function Blocks at first Try to parse the UMP Endpoint and UMP Function Blocks for building the topology at first. Only when those are missing (e.g. on an older USB MIDI 2.0 spec or a unidirectional endpoint), the driver still creates blocks based on USB group terminal block information as fallback. Link: https://lore.kernel.org/r/20230612081054.17200-4-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-06-12 08:10:47 +00:00
bool ump_parsed; /* Parsed UMP 1.1 EP/FB info*/
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
struct list_head list; /* list to umidi->rawmidi_list */
};
/* top-level instance per USB MIDI interface */
struct snd_usb_midi2_interface {
struct snd_usb_audio *chip; /* assigned USB-audio card */
struct usb_interface *iface; /* assigned USB interface */
struct usb_host_interface *hostif;
const char *blk_descs; /* group terminal block descriptors */
unsigned int blk_desc_size; /* size of GTB descriptors */
bool disconnected;
struct list_head ep_list; /* list of endpoints */
struct list_head rawmidi_list; /* list of UMP rawmidis */
struct list_head list; /* list to chip->midi_v2_list */
};
/* submit URBs as much as possible; used for both input and output */
static void do_submit_urbs_locked(struct snd_usb_midi2_endpoint *ep,
int (*prepare)(struct snd_usb_midi2_endpoint *,
struct urb *))
{
struct snd_usb_midi2_urb *ctx;
int index, err = 0;
if (ep->disconnected)
return;
while (ep->urb_free) {
index = find_first_bit(&ep->urb_free, ep->num_urbs);
if (index >= ep->num_urbs)
return;
ctx = &ep->urbs[index];
err = prepare(ep, ctx->urb);
if (err < 0)
return;
if (!ctx->urb->transfer_buffer_length)
return;
ctx->urb->dev = ep->dev;
err = usb_submit_urb(ctx->urb, GFP_ATOMIC);
if (err < 0) {
dev_dbg(&ep->dev->dev,
"usb_submit_urb error %d\n", err);
return;
}
clear_bit(index, &ep->urb_free);
}
}
/* prepare for output submission: copy from rawmidi buffer to urb packet */
static int prepare_output_urb(struct snd_usb_midi2_endpoint *ep,
struct urb *urb)
{
int count;
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
count = snd_ump_transmit(ep->ump, urb->transfer_buffer,
ep->packets);
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
if (count < 0) {
dev_dbg(&ep->dev->dev, "rawmidi transmit error %d\n", count);
return count;
}
cpu_to_le32_array((u32 *)urb->transfer_buffer, count >> 2);
urb->transfer_buffer_length = count;
return 0;
}
static void submit_output_urbs_locked(struct snd_usb_midi2_endpoint *ep)
{
do_submit_urbs_locked(ep, prepare_output_urb);
}
/* URB completion for output; re-filling and re-submit */
static void output_urb_complete(struct urb *urb)
{
struct snd_usb_midi2_urb *ctx = urb->context;
struct snd_usb_midi2_endpoint *ep = ctx->ep;
unsigned long flags;
spin_lock_irqsave(&ep->lock, flags);
set_bit(ctx->index, &ep->urb_free);
if (urb->status >= 0 && atomic_read(&ep->running))
submit_output_urbs_locked(ep);
if (ep->urb_free == ep->urb_free_mask)
wake_up(&ep->wait);
spin_unlock_irqrestore(&ep->lock, flags);
}
/* prepare for input submission: just set the buffer length */
static int prepare_input_urb(struct snd_usb_midi2_endpoint *ep,
struct urb *urb)
{
urb->transfer_buffer_length = ep->packets;
return 0;
}
static void submit_input_urbs_locked(struct snd_usb_midi2_endpoint *ep)
{
do_submit_urbs_locked(ep, prepare_input_urb);
}
/* URB completion for input; copy into rawmidi buffer and resubmit */
static void input_urb_complete(struct urb *urb)
{
struct snd_usb_midi2_urb *ctx = urb->context;
struct snd_usb_midi2_endpoint *ep = ctx->ep;
unsigned long flags;
int len;
spin_lock_irqsave(&ep->lock, flags);
if (ep->disconnected || urb->status < 0)
goto dequeue;
len = urb->actual_length;
len &= ~3; /* align UMP */
if (len > ep->packets)
len = ep->packets;
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
if (len > 0) {
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
le32_to_cpu_array((u32 *)urb->transfer_buffer, len >> 2);
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
snd_ump_receive(ep->ump, (u32 *)urb->transfer_buffer, len);
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
}
dequeue:
set_bit(ctx->index, &ep->urb_free);
submit_input_urbs_locked(ep);
if (ep->urb_free == ep->urb_free_mask)
wake_up(&ep->wait);
spin_unlock_irqrestore(&ep->lock, flags);
}
/* URB submission helper; for both direction */
static void submit_io_urbs(struct snd_usb_midi2_endpoint *ep)
{
unsigned long flags;
if (!ep)
return;
spin_lock_irqsave(&ep->lock, flags);
if (ep->direction == STR_IN)
submit_input_urbs_locked(ep);
else
submit_output_urbs_locked(ep);
spin_unlock_irqrestore(&ep->lock, flags);
}
/* kill URBs for close, suspend and disconnect */
static void kill_midi_urbs(struct snd_usb_midi2_endpoint *ep, bool suspending)
{
int i;
if (!ep)
return;
if (suspending)
ep->suspended = ep->running;
atomic_set(&ep->running, 0);
for (i = 0; i < ep->num_urbs; i++) {
if (!ep->urbs[i].urb)
break;
usb_kill_urb(ep->urbs[i].urb);
}
}
/* wait until all URBs get freed */
static void drain_urb_queue(struct snd_usb_midi2_endpoint *ep)
{
if (!ep)
return;
spin_lock_irq(&ep->lock);
atomic_set(&ep->running, 0);
wait_event_lock_irq_timeout(ep->wait,
ep->disconnected ||
ep->urb_free == ep->urb_free_mask,
ep->lock, msecs_to_jiffies(500));
spin_unlock_irq(&ep->lock);
}
/* release URBs for an EP */
static void free_midi_urbs(struct snd_usb_midi2_endpoint *ep)
{
struct snd_usb_midi2_urb *ctx;
int i;
if (!ep)
return;
ALSA: usb-audio: Fix potential memory leaks at error path for UMP open The allocation and initialization errors at alloc_midi_urbs() that is called at MIDI 2.0 / UMP device are supposed to be handled at the caller side by invoking free_midi_urbs(). However, free_midi_urbs() loops only for ep->num_urbs entries, and since ep->num_entries wasn't updated yet at the allocation / init error in alloc_midi_urbs(), this entry won't be released. The intention of free_midi_urbs() is to release the whole elements, so change the loop size to NUM_URBS to scan over all elements for fixing the missed releases. Also, the call of free_midi_urbs() is missing at snd_usb_midi_v2_open(). Although it'll be released later at reopen/close or disconnection, it's better to release immediately at the error path. Fixes: ff49d1df79ae ("ALSA: usb-audio: USB MIDI 2.0 UMP support") Reported-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Closes: https://lore.kernel.org/r/fc275ed315b9157952dcf2744ee7bdb78defdb5f.1693746347.git.christophe.jaillet@wanadoo.fr Link: https://lore.kernel.org/r/20230905054511.20502-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-09-05 05:45:11 +00:00
for (i = 0; i < NUM_URBS; ++i) {
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
ctx = &ep->urbs[i];
if (!ctx->urb)
break;
usb_free_coherent(ep->dev, ep->packets,
ctx->urb->transfer_buffer,
ctx->urb->transfer_dma);
usb_free_urb(ctx->urb);
ctx->urb = NULL;
}
ep->num_urbs = 0;
}
/* allocate URBs for an EP */
ALSA: usb-audio: Fix potential memory leaks at error path for UMP open The allocation and initialization errors at alloc_midi_urbs() that is called at MIDI 2.0 / UMP device are supposed to be handled at the caller side by invoking free_midi_urbs(). However, free_midi_urbs() loops only for ep->num_urbs entries, and since ep->num_entries wasn't updated yet at the allocation / init error in alloc_midi_urbs(), this entry won't be released. The intention of free_midi_urbs() is to release the whole elements, so change the loop size to NUM_URBS to scan over all elements for fixing the missed releases. Also, the call of free_midi_urbs() is missing at snd_usb_midi_v2_open(). Although it'll be released later at reopen/close or disconnection, it's better to release immediately at the error path. Fixes: ff49d1df79ae ("ALSA: usb-audio: USB MIDI 2.0 UMP support") Reported-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Closes: https://lore.kernel.org/r/fc275ed315b9157952dcf2744ee7bdb78defdb5f.1693746347.git.christophe.jaillet@wanadoo.fr Link: https://lore.kernel.org/r/20230905054511.20502-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-09-05 05:45:11 +00:00
/* the callers should handle allocation errors via free_midi_urbs() */
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
static int alloc_midi_urbs(struct snd_usb_midi2_endpoint *ep)
{
struct snd_usb_midi2_urb *ctx;
void (*comp)(struct urb *urb);
void *buffer;
int i, err;
int endpoint, len;
endpoint = ep->endpoint;
len = ep->packets;
if (ep->direction == STR_IN)
comp = input_urb_complete;
else
comp = output_urb_complete;
ep->num_urbs = 0;
ep->urb_free = ep->urb_free_mask = 0;
for (i = 0; i < NUM_URBS; i++) {
ctx = &ep->urbs[i];
ctx->index = i;
ctx->urb = usb_alloc_urb(0, GFP_KERNEL);
if (!ctx->urb) {
dev_err(&ep->dev->dev, "URB alloc failed\n");
return -ENOMEM;
}
ctx->ep = ep;
buffer = usb_alloc_coherent(ep->dev, len, GFP_KERNEL,
&ctx->urb->transfer_dma);
if (!buffer) {
dev_err(&ep->dev->dev,
"URB buffer alloc failed (size %d)\n", len);
return -ENOMEM;
}
if (ep->interval)
usb_fill_int_urb(ctx->urb, ep->dev, ep->pipe,
buffer, len, comp, ctx, ep->interval);
else
usb_fill_bulk_urb(ctx->urb, ep->dev, ep->pipe,
buffer, len, comp, ctx);
err = usb_urb_ep_type_check(ctx->urb);
if (err < 0) {
dev_err(&ep->dev->dev, "invalid MIDI EP %x\n",
endpoint);
return err;
}
ctx->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
ep->num_urbs++;
}
ep->urb_free = ep->urb_free_mask = GENMASK(ep->num_urbs - 1, 0);
return 0;
}
static struct snd_usb_midi2_endpoint *
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
ump_to_endpoint(struct snd_ump_endpoint *ump, int dir)
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
{
struct snd_usb_midi2_ump *rmidi = ump->private_data;
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
return rmidi->eps[dir];
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
}
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
/* ump open callback */
static int snd_usb_midi_v2_open(struct snd_ump_endpoint *ump, int dir)
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
{
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
struct snd_usb_midi2_endpoint *ep = ump_to_endpoint(ump, dir);
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
int err = 0;
if (!ep || !ep->endpoint)
return -ENODEV;
if (ep->disconnected)
return -EIO;
if (ep->direction == STR_OUT) {
err = alloc_midi_urbs(ep);
ALSA: usb-audio: Fix potential memory leaks at error path for UMP open The allocation and initialization errors at alloc_midi_urbs() that is called at MIDI 2.0 / UMP device are supposed to be handled at the caller side by invoking free_midi_urbs(). However, free_midi_urbs() loops only for ep->num_urbs entries, and since ep->num_entries wasn't updated yet at the allocation / init error in alloc_midi_urbs(), this entry won't be released. The intention of free_midi_urbs() is to release the whole elements, so change the loop size to NUM_URBS to scan over all elements for fixing the missed releases. Also, the call of free_midi_urbs() is missing at snd_usb_midi_v2_open(). Although it'll be released later at reopen/close or disconnection, it's better to release immediately at the error path. Fixes: ff49d1df79ae ("ALSA: usb-audio: USB MIDI 2.0 UMP support") Reported-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Closes: https://lore.kernel.org/r/fc275ed315b9157952dcf2744ee7bdb78defdb5f.1693746347.git.christophe.jaillet@wanadoo.fr Link: https://lore.kernel.org/r/20230905054511.20502-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-09-05 05:45:11 +00:00
if (err) {
free_midi_urbs(ep);
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
return err;
ALSA: usb-audio: Fix potential memory leaks at error path for UMP open The allocation and initialization errors at alloc_midi_urbs() that is called at MIDI 2.0 / UMP device are supposed to be handled at the caller side by invoking free_midi_urbs(). However, free_midi_urbs() loops only for ep->num_urbs entries, and since ep->num_entries wasn't updated yet at the allocation / init error in alloc_midi_urbs(), this entry won't be released. The intention of free_midi_urbs() is to release the whole elements, so change the loop size to NUM_URBS to scan over all elements for fixing the missed releases. Also, the call of free_midi_urbs() is missing at snd_usb_midi_v2_open(). Although it'll be released later at reopen/close or disconnection, it's better to release immediately at the error path. Fixes: ff49d1df79ae ("ALSA: usb-audio: USB MIDI 2.0 UMP support") Reported-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Closes: https://lore.kernel.org/r/fc275ed315b9157952dcf2744ee7bdb78defdb5f.1693746347.git.christophe.jaillet@wanadoo.fr Link: https://lore.kernel.org/r/20230905054511.20502-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-09-05 05:45:11 +00:00
}
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
}
return 0;
}
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
/* ump close callback */
static void snd_usb_midi_v2_close(struct snd_ump_endpoint *ump, int dir)
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
{
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
struct snd_usb_midi2_endpoint *ep = ump_to_endpoint(ump, dir);
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
if (ep->direction == STR_OUT) {
kill_midi_urbs(ep, false);
drain_urb_queue(ep);
free_midi_urbs(ep);
}
}
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
/* ump trigger callback */
static void snd_usb_midi_v2_trigger(struct snd_ump_endpoint *ump, int dir,
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
int up)
{
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
struct snd_usb_midi2_endpoint *ep = ump_to_endpoint(ump, dir);
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
atomic_set(&ep->running, up);
if (up && ep->direction == STR_OUT && !ep->disconnected)
submit_io_urbs(ep);
}
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
/* ump drain callback */
static void snd_usb_midi_v2_drain(struct snd_ump_endpoint *ump, int dir)
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
{
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
struct snd_usb_midi2_endpoint *ep = ump_to_endpoint(ump, dir);
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
drain_urb_queue(ep);
}
/* allocate and start all input streams */
static int start_input_streams(struct snd_usb_midi2_interface *umidi)
{
struct snd_usb_midi2_endpoint *ep;
int err;
list_for_each_entry(ep, &umidi->ep_list, list) {
if (ep->direction == STR_IN) {
err = alloc_midi_urbs(ep);
if (err < 0)
goto error;
}
}
list_for_each_entry(ep, &umidi->ep_list, list) {
if (ep->direction == STR_IN)
submit_io_urbs(ep);
}
return 0;
error:
list_for_each_entry(ep, &umidi->ep_list, list) {
if (ep->direction == STR_IN)
free_midi_urbs(ep);
}
return err;
}
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
static const struct snd_ump_ops snd_usb_midi_v2_ump_ops = {
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
.open = snd_usb_midi_v2_open,
.close = snd_usb_midi_v2_close,
.trigger = snd_usb_midi_v2_trigger,
.drain = snd_usb_midi_v2_drain,
};
/* create a USB MIDI 2.0 endpoint object */
static int create_midi2_endpoint(struct snd_usb_midi2_interface *umidi,
struct usb_host_endpoint *hostep,
const struct usb_ms20_endpoint_descriptor *ms_ep)
{
struct snd_usb_midi2_endpoint *ep;
int endpoint, dir;
usb_audio_dbg(umidi->chip, "Creating an EP 0x%02x, #GTB=%d\n",
hostep->desc.bEndpointAddress,
ms_ep->bNumGrpTrmBlock);
ep = kzalloc(sizeof(*ep), GFP_KERNEL);
if (!ep)
return -ENOMEM;
spin_lock_init(&ep->lock);
init_waitqueue_head(&ep->wait);
ep->dev = umidi->chip->dev;
endpoint = hostep->desc.bEndpointAddress;
dir = (endpoint & USB_DIR_IN) ? STR_IN : STR_OUT;
ep->endpoint = endpoint;
ep->direction = dir;
ep->ms_ep = ms_ep;
if (usb_endpoint_xfer_int(&hostep->desc))
ep->interval = hostep->desc.bInterval;
else
ep->interval = 0;
if (dir == STR_IN) {
if (ep->interval)
ep->pipe = usb_rcvintpipe(ep->dev, endpoint);
else
ep->pipe = usb_rcvbulkpipe(ep->dev, endpoint);
} else {
if (ep->interval)
ep->pipe = usb_sndintpipe(ep->dev, endpoint);
else
ep->pipe = usb_sndbulkpipe(ep->dev, endpoint);
}
ep->packets = usb_maxpacket(ep->dev, ep->pipe);
list_add_tail(&ep->list, &umidi->ep_list);
return 0;
}
/* destructor for endpoint; from snd_usb_midi_v2_free() */
static void free_midi2_endpoint(struct snd_usb_midi2_endpoint *ep)
{
list_del(&ep->list);
free_midi_urbs(ep);
kfree(ep);
}
/* call all endpoint destructors */
static void free_all_midi2_endpoints(struct snd_usb_midi2_interface *umidi)
{
struct snd_usb_midi2_endpoint *ep;
while (!list_empty(&umidi->ep_list)) {
ep = list_first_entry(&umidi->ep_list,
struct snd_usb_midi2_endpoint, list);
free_midi2_endpoint(ep);
}
}
/* find a MIDI STREAMING descriptor with a given subtype */
static void *find_usb_ms_endpoint_descriptor(struct usb_host_endpoint *hostep,
unsigned char subtype)
{
unsigned char *extra = hostep->extra;
int extralen = hostep->extralen;
while (extralen > 3) {
struct usb_ms_endpoint_descriptor *ms_ep =
(struct usb_ms_endpoint_descriptor *)extra;
if (ms_ep->bLength > 3 &&
ms_ep->bDescriptorType == USB_DT_CS_ENDPOINT &&
ms_ep->bDescriptorSubtype == subtype)
return ms_ep;
if (!extra[0])
break;
extralen -= extra[0];
extra += extra[0];
}
return NULL;
}
/* get the full group terminal block descriptors and return the size */
static int get_group_terminal_block_descs(struct snd_usb_midi2_interface *umidi)
{
struct usb_host_interface *hostif = umidi->hostif;
struct usb_device *dev = umidi->chip->dev;
struct usb_ms20_gr_trm_block_header_descriptor header = { 0 };
unsigned char *data;
int err, size;
err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
USB_REQ_GET_DESCRIPTOR,
USB_RECIP_INTERFACE | USB_TYPE_STANDARD | USB_DIR_IN,
USB_DT_CS_GR_TRM_BLOCK << 8 | hostif->desc.bAlternateSetting,
hostif->desc.bInterfaceNumber,
&header, sizeof(header));
if (err < 0)
return err;
size = __le16_to_cpu(header.wTotalLength);
if (!size) {
dev_err(&dev->dev, "Failed to get GTB descriptors for %d:%d\n",
hostif->desc.bInterfaceNumber, hostif->desc.bAlternateSetting);
return -EINVAL;
}
data = kzalloc(size, GFP_KERNEL);
if (!data)
return -ENOMEM;
err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
USB_REQ_GET_DESCRIPTOR,
USB_RECIP_INTERFACE | USB_TYPE_STANDARD | USB_DIR_IN,
USB_DT_CS_GR_TRM_BLOCK << 8 | hostif->desc.bAlternateSetting,
hostif->desc.bInterfaceNumber, data, size);
if (err < 0) {
kfree(data);
return err;
}
umidi->blk_descs = data;
umidi->blk_desc_size = size;
return 0;
}
/* find the corresponding group terminal block descriptor */
static const struct usb_ms20_gr_trm_block_descriptor *
find_group_terminal_block(struct snd_usb_midi2_interface *umidi, int id)
{
const unsigned char *data = umidi->blk_descs;
int size = umidi->blk_desc_size;
const struct usb_ms20_gr_trm_block_descriptor *desc;
size -= sizeof(struct usb_ms20_gr_trm_block_header_descriptor);
data += sizeof(struct usb_ms20_gr_trm_block_header_descriptor);
while (size > 0 && *data && *data <= size) {
desc = (const struct usb_ms20_gr_trm_block_descriptor *)data;
if (desc->bLength >= sizeof(*desc) &&
desc->bDescriptorType == USB_DT_CS_GR_TRM_BLOCK &&
desc->bDescriptorSubtype == USB_MS_GR_TRM_BLOCK &&
desc->bGrpTrmBlkID == id)
return desc;
size -= *data;
data += *data;
}
return NULL;
}
/* fill up the information from GTB */
static int parse_group_terminal_block(struct snd_usb_midi2_ump *rmidi,
const struct usb_ms20_gr_trm_block_descriptor *desc)
{
struct snd_ump_endpoint *ump = rmidi->ump;
ALSA: usb-audio: Inform inconsistent protocols in GTBs When parsing Group Terminal Blocks, we overwrote the preferred protocol and the protocol capabilities silently from the last parsed GTB. This patch adds the information print indicating the unexpected overrides instead of silent action. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-17-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:37 +00:00
unsigned int protocol, protocol_caps;
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
/* set default protocol */
switch (desc->bMIDIProtocol) {
case USB_MS_MIDI_PROTO_1_0_64:
case USB_MS_MIDI_PROTO_1_0_64_JRTS:
case USB_MS_MIDI_PROTO_1_0_128:
case USB_MS_MIDI_PROTO_1_0_128_JRTS:
ALSA: usb-audio: Inform inconsistent protocols in GTBs When parsing Group Terminal Blocks, we overwrote the preferred protocol and the protocol capabilities silently from the last parsed GTB. This patch adds the information print indicating the unexpected overrides instead of silent action. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-17-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:37 +00:00
protocol = SNDRV_UMP_EP_INFO_PROTO_MIDI1;
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
break;
case USB_MS_MIDI_PROTO_2_0:
case USB_MS_MIDI_PROTO_2_0_JRTS:
ALSA: usb-audio: Inform inconsistent protocols in GTBs When parsing Group Terminal Blocks, we overwrote the preferred protocol and the protocol capabilities silently from the last parsed GTB. This patch adds the information print indicating the unexpected overrides instead of silent action. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-17-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:37 +00:00
protocol = SNDRV_UMP_EP_INFO_PROTO_MIDI2;
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
break;
ALSA: usb-audio: Inform inconsistent protocols in GTBs When parsing Group Terminal Blocks, we overwrote the preferred protocol and the protocol capabilities silently from the last parsed GTB. This patch adds the information print indicating the unexpected overrides instead of silent action. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-17-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:37 +00:00
default:
return 0;
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
}
ALSA: usb-audio: Accept multiple protocols in GTBs It's valid to give different protocols via multiple GTBs; e.g. a MIDI 1.0 port is embedded in a MIDI 2.0 device that talks with MIDI 2.0 protocol. However, the current driver implementation assumes only a single protocol over the whole Endpoint, and it can't handle such a scenario. This patch changes the driver's behavior to parse GTBs to accept multiple protocols. Instead of switching to the last given protocol, it adds the protocol capability bits now. Meanwhile, the default protocol is chosen by the first given protocol in GTBs. Practically seen, this should be a minor issue, as new devices should specify the protocols properly via UMP Endpoint Info messages, so this is rather just covering a corner case. Signed-off-by: Takashi Iwai <tiwai@suse.de> Link: https://patch.msgid.link/20240807092303.1935-3-tiwai@suse.de
2024-08-07 09:22:57 +00:00
if (!ump->info.protocol)
ump->info.protocol = protocol;
ALSA: usb-audio: Inform inconsistent protocols in GTBs When parsing Group Terminal Blocks, we overwrote the preferred protocol and the protocol capabilities silently from the last parsed GTB. This patch adds the information print indicating the unexpected overrides instead of silent action. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-17-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:37 +00:00
protocol_caps = protocol;
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
switch (desc->bMIDIProtocol) {
case USB_MS_MIDI_PROTO_1_0_64_JRTS:
case USB_MS_MIDI_PROTO_1_0_128_JRTS:
case USB_MS_MIDI_PROTO_2_0_JRTS:
ALSA: usb-audio: Inform inconsistent protocols in GTBs When parsing Group Terminal Blocks, we overwrote the preferred protocol and the protocol capabilities silently from the last parsed GTB. This patch adds the information print indicating the unexpected overrides instead of silent action. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-17-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:37 +00:00
protocol_caps |= SNDRV_UMP_EP_INFO_PROTO_JRTS_TX |
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
SNDRV_UMP_EP_INFO_PROTO_JRTS_RX;
break;
}
ALSA: usb-audio: Accept multiple protocols in GTBs It's valid to give different protocols via multiple GTBs; e.g. a MIDI 1.0 port is embedded in a MIDI 2.0 device that talks with MIDI 2.0 protocol. However, the current driver implementation assumes only a single protocol over the whole Endpoint, and it can't handle such a scenario. This patch changes the driver's behavior to parse GTBs to accept multiple protocols. Instead of switching to the last given protocol, it adds the protocol capability bits now. Meanwhile, the default protocol is chosen by the first given protocol in GTBs. Practically seen, this should be a minor issue, as new devices should specify the protocols properly via UMP Endpoint Info messages, so this is rather just covering a corner case. Signed-off-by: Takashi Iwai <tiwai@suse.de> Link: https://patch.msgid.link/20240807092303.1935-3-tiwai@suse.de
2024-08-07 09:22:57 +00:00
ump->info.protocol_caps |= protocol_caps;
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
return 0;
}
/* allocate and parse for each assigned group terminal block */
static int parse_group_terminal_blocks(struct snd_usb_midi2_interface *umidi)
{
struct snd_usb_midi2_ump *rmidi;
const struct usb_ms20_gr_trm_block_descriptor *desc;
int err;
err = get_group_terminal_block_descs(umidi);
if (err < 0)
return err;
if (!umidi->blk_descs)
return 0;
list_for_each_entry(rmidi, &umidi->rawmidi_list, list) {
desc = find_group_terminal_block(umidi, rmidi->usb_block_id);
if (!desc)
continue;
err = parse_group_terminal_block(rmidi, desc);
if (err < 0)
return err;
}
return 0;
}
/* parse endpoints included in the given interface and create objects */
static int parse_midi_2_0_endpoints(struct snd_usb_midi2_interface *umidi)
{
struct usb_host_interface *hostif = umidi->hostif;
struct usb_host_endpoint *hostep;
struct usb_ms20_endpoint_descriptor *ms_ep;
int i, err;
for (i = 0; i < hostif->desc.bNumEndpoints; i++) {
hostep = &hostif->endpoint[i];
if (!usb_endpoint_xfer_bulk(&hostep->desc) &&
!usb_endpoint_xfer_int(&hostep->desc))
continue;
ms_ep = find_usb_ms_endpoint_descriptor(hostep, USB_MS_GENERAL_2_0);
if (!ms_ep)
continue;
if (ms_ep->bLength <= sizeof(*ms_ep))
continue;
if (!ms_ep->bNumGrpTrmBlock)
continue;
if (ms_ep->bLength < sizeof(*ms_ep) + ms_ep->bNumGrpTrmBlock)
continue;
err = create_midi2_endpoint(umidi, hostep, ms_ep);
if (err < 0)
return err;
}
return 0;
}
static void free_all_midi2_umps(struct snd_usb_midi2_interface *umidi)
{
struct snd_usb_midi2_ump *rmidi;
while (!list_empty(&umidi->rawmidi_list)) {
rmidi = list_first_entry(&umidi->rawmidi_list,
struct snd_usb_midi2_ump, list);
list_del(&rmidi->list);
kfree(rmidi);
}
}
static int create_midi2_ump(struct snd_usb_midi2_interface *umidi,
struct snd_usb_midi2_endpoint *ep_in,
struct snd_usb_midi2_endpoint *ep_out,
int blk_id)
{
struct snd_usb_midi2_ump *rmidi;
struct snd_ump_endpoint *ump;
int input, output;
char idstr[16];
int err;
rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
if (!rmidi)
return -ENOMEM;
INIT_LIST_HEAD(&rmidi->list);
rmidi->dev = umidi->chip->dev;
rmidi->umidi = umidi;
rmidi->usb_block_id = blk_id;
rmidi->index = umidi->chip->num_rawmidis;
snprintf(idstr, sizeof(idstr), "UMP %d", rmidi->index);
input = ep_in ? 1 : 0;
output = ep_out ? 1 : 0;
err = snd_ump_endpoint_new(umidi->chip->card, idstr, rmidi->index,
output, input, &ump);
if (err < 0) {
usb_audio_dbg(umidi->chip, "Failed to create a UMP object\n");
kfree(rmidi);
return err;
}
rmidi->ump = ump;
umidi->chip->num_rawmidis++;
ump->private_data = rmidi;
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
ump->ops = &snd_usb_midi_v2_ump_ops;
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
rmidi->eps[STR_IN] = ep_in;
rmidi->eps[STR_OUT] = ep_out;
if (ep_in) {
ep_in->pair = ep_out;
ep_in->rmidi = rmidi;
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
ep_in->ump = ump;
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
}
if (ep_out) {
ep_out->pair = ep_in;
ep_out->rmidi = rmidi;
ALSA: ump: Redirect rawmidi substream access via own helpers This is a code refactoring for abstracting the rawmidi access to the UMP's own helpers. It's a preliminary work for the later code refactoring of the UMP layer. Until now, we access to the rawmidi substream directly from the driver via rawmidi access helpers, but after this change, the driver is supposed to access via the newly introduced snd_ump_ops and receive/transmit via snd_ump_receive() and snd_ump_transmit() helpers. As of this commit, those are merely wrappers for the rawmidi substream, and no much function change is seen here. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-14-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:34 +00:00
ep_out->ump = ump;
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
}
list_add_tail(&rmidi->list, &umidi->rawmidi_list);
return 0;
}
/* find the UMP EP with the given USB block id */
static struct snd_usb_midi2_ump *
find_midi2_ump(struct snd_usb_midi2_interface *umidi, int blk_id)
{
struct snd_usb_midi2_ump *rmidi;
list_for_each_entry(rmidi, &umidi->rawmidi_list, list) {
if (rmidi->usb_block_id == blk_id)
return rmidi;
}
return NULL;
}
/* look for the matching output endpoint and create UMP object if found */
static int find_matching_ep_partner(struct snd_usb_midi2_interface *umidi,
struct snd_usb_midi2_endpoint *ep,
int blk_id)
{
struct snd_usb_midi2_endpoint *pair_ep;
int blk;
usb_audio_dbg(umidi->chip, "Looking for a pair for EP-in 0x%02x\n",
ep->endpoint);
list_for_each_entry(pair_ep, &umidi->ep_list, list) {
if (pair_ep->direction != STR_OUT)
continue;
if (pair_ep->pair)
continue; /* already paired */
for (blk = 0; blk < pair_ep->ms_ep->bNumGrpTrmBlock; blk++) {
if (pair_ep->ms_ep->baAssoGrpTrmBlkID[blk] == blk_id) {
usb_audio_dbg(umidi->chip,
"Found a match with EP-out 0x%02x blk %d\n",
pair_ep->endpoint, blk);
return create_midi2_ump(umidi, ep, pair_ep, blk_id);
}
}
}
return 0;
}
ALSA: usb-audio: Parse UMP Endpoint and Function Blocks at first Try to parse the UMP Endpoint and UMP Function Blocks for building the topology at first. Only when those are missing (e.g. on an older USB MIDI 2.0 spec or a unidirectional endpoint), the driver still creates blocks based on USB group terminal block information as fallback. Link: https://lore.kernel.org/r/20230612081054.17200-4-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-06-12 08:10:47 +00:00
/* Call UMP helper to parse UMP endpoints;
* this needs to be called after starting the input streams for bi-directional
* communications
*/
static int parse_ump_endpoints(struct snd_usb_midi2_interface *umidi)
{
struct snd_usb_midi2_ump *rmidi;
int err;
list_for_each_entry(rmidi, &umidi->rawmidi_list, list) {
if (!rmidi->ump ||
!(rmidi->ump->core.info_flags & SNDRV_RAWMIDI_INFO_DUPLEX))
continue;
err = snd_ump_parse_endpoint(rmidi->ump);
if (!err) {
rmidi->ump_parsed = true;
} else {
if (err == -ENOMEM)
return err;
/* fall back to GTB later */
}
}
return 0;
}
ALSA: usb-audio: Create UMP blocks from USB MIDI GTBs USB MIDI spec defines the Group Terminal Blocks (GTB) that associate multiple UMP Groups. Those correspond to snd_ump_block entities in ALSA UMP abstraction, and now we create those UMP Block objects for each UMP Endpoint from the parsed GTB information. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-13-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:33 +00:00
/* create a UMP block from a GTB entry */
static int create_gtb_block(struct snd_usb_midi2_ump *rmidi, int dir, int blk)
{
struct snd_usb_midi2_interface *umidi = rmidi->umidi;
const struct usb_ms20_gr_trm_block_descriptor *desc;
struct snd_ump_block *fb;
int type, err;
desc = find_group_terminal_block(umidi, blk);
if (!desc)
return 0;
usb_audio_dbg(umidi->chip,
"GTB %d: type=%d, group=%d/%d, protocol=%d, in bw=%d, out bw=%d\n",
blk, desc->bGrpTrmBlkType, desc->nGroupTrm,
desc->nNumGroupTrm, desc->bMIDIProtocol,
__le16_to_cpu(desc->wMaxInputBandwidth),
__le16_to_cpu(desc->wMaxOutputBandwidth));
/* assign the direction */
switch (desc->bGrpTrmBlkType) {
case USB_MS_GR_TRM_BLOCK_TYPE_BIDIRECTIONAL:
type = SNDRV_UMP_DIR_BIDIRECTION;
break;
case USB_MS_GR_TRM_BLOCK_TYPE_INPUT_ONLY:
type = SNDRV_UMP_DIR_INPUT;
break;
case USB_MS_GR_TRM_BLOCK_TYPE_OUTPUT_ONLY:
type = SNDRV_UMP_DIR_OUTPUT;
break;
default:
usb_audio_dbg(umidi->chip, "Unsupported GTB type %d\n",
desc->bGrpTrmBlkType);
return 0; /* unsupported */
}
/* guess work: set blk-1 as the (0-based) block ID */
err = snd_ump_block_new(rmidi->ump, blk - 1, type,
desc->nGroupTrm, desc->nNumGroupTrm,
&fb);
if (err == -EBUSY)
return 0; /* already present */
else if (err)
return err;
if (desc->iBlockItem)
usb_string(rmidi->dev, desc->iBlockItem,
fb->info.name, sizeof(fb->info.name));
if (__le16_to_cpu(desc->wMaxInputBandwidth) == 1 ||
__le16_to_cpu(desc->wMaxOutputBandwidth) == 1)
fb->info.flags |= SNDRV_UMP_BLOCK_IS_MIDI1 |
SNDRV_UMP_BLOCK_IS_LOWSPEED;
ALSA: usb-audio: Set MIDI1 flag appropriately for GTB MIDI 1.0 entry When a MIDI 1.0 protocol is specified in a GTB entry while others are set in MIDI 2.0, it should be seen as a legacy MIDI 1.0 port. Since recently we allow drivers to set a flag SNDRV_UMP_BLOCK_IS_MIDI1 to a FB for that purpose. This patch tries to set that flag when the device shows such a configuration. Signed-off-by: Takashi Iwai <tiwai@suse.de> Link: https://patch.msgid.link/20240807092303.1935-4-tiwai@suse.de
2024-08-07 09:22:58 +00:00
/* if MIDI 2.0 protocol is supported and yet the GTB shows MIDI 1.0,
* treat it as a MIDI 1.0-specific block
*/
if (rmidi->ump->info.protocol_caps & SNDRV_UMP_EP_INFO_PROTO_MIDI2) {
switch (desc->bMIDIProtocol) {
case USB_MS_MIDI_PROTO_1_0_64:
case USB_MS_MIDI_PROTO_1_0_64_JRTS:
case USB_MS_MIDI_PROTO_1_0_128:
case USB_MS_MIDI_PROTO_1_0_128_JRTS:
fb->info.flags |= SNDRV_UMP_BLOCK_IS_MIDI1;
break;
}
}
ALSA: usb-audio: Update UMP group attributes for GTB blocks, too When a FB is created from a GTB instead of UMP FB Info inquiry, we missed the update of the corresponding UMP Group attributes. Export the call of updater and let it be called from the USB driver. Fixes: 0642a3c5cacc ("ALSA: ump: Update substream name from assigned FB names") Signed-off-by: Takashi Iwai <tiwai@suse.de> Link: https://patch.msgid.link/20240807092303.1935-5-tiwai@suse.de
2024-08-07 09:22:59 +00:00
snd_ump_update_group_attrs(rmidi->ump);
ALSA: usb-audio: Create UMP blocks from USB MIDI GTBs USB MIDI spec defines the Group Terminal Blocks (GTB) that associate multiple UMP Groups. Those correspond to snd_ump_block entities in ALSA UMP abstraction, and now we create those UMP Block objects for each UMP Endpoint from the parsed GTB information. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-13-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:33 +00:00
usb_audio_dbg(umidi->chip,
ALSA: usb-audio: Set MIDI1 flag appropriately for GTB MIDI 1.0 entry When a MIDI 1.0 protocol is specified in a GTB entry while others are set in MIDI 2.0, it should be seen as a legacy MIDI 1.0 port. Since recently we allow drivers to set a flag SNDRV_UMP_BLOCK_IS_MIDI1 to a FB for that purpose. This patch tries to set that flag when the device shows such a configuration. Signed-off-by: Takashi Iwai <tiwai@suse.de> Link: https://patch.msgid.link/20240807092303.1935-4-tiwai@suse.de
2024-08-07 09:22:58 +00:00
"Created a UMP block %d from GTB, name=%s, flags=0x%x\n",
blk, fb->info.name, fb->info.flags);
ALSA: usb-audio: Create UMP blocks from USB MIDI GTBs USB MIDI spec defines the Group Terminal Blocks (GTB) that associate multiple UMP Groups. Those correspond to snd_ump_block entities in ALSA UMP abstraction, and now we create those UMP Block objects for each UMP Endpoint from the parsed GTB information. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-13-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:33 +00:00
return 0;
}
/* Create UMP blocks for each UMP EP */
static int create_blocks_from_gtb(struct snd_usb_midi2_interface *umidi)
{
struct snd_usb_midi2_ump *rmidi;
int i, blk, err, dir;
list_for_each_entry(rmidi, &umidi->rawmidi_list, list) {
if (!rmidi->ump)
continue;
/* Blocks have been already created? */
ALSA: usb-audio: Parse UMP Endpoint and Function Blocks at first Try to parse the UMP Endpoint and UMP Function Blocks for building the topology at first. Only when those are missing (e.g. on an older USB MIDI 2.0 spec or a unidirectional endpoint), the driver still creates blocks based on USB group terminal block information as fallback. Link: https://lore.kernel.org/r/20230612081054.17200-4-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-06-12 08:10:47 +00:00
if (rmidi->ump_parsed || rmidi->ump->info.num_blocks)
ALSA: usb-audio: Create UMP blocks from USB MIDI GTBs USB MIDI spec defines the Group Terminal Blocks (GTB) that associate multiple UMP Groups. Those correspond to snd_ump_block entities in ALSA UMP abstraction, and now we create those UMP Block objects for each UMP Endpoint from the parsed GTB information. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-13-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:33 +00:00
continue;
ALSA: ump: Add info flag bit for static blocks UMP v1.1 spec allows to inform whether the function blocks are static and not dynamically updated. Add a new flag bit to snd_ump_endpoint_info to reflect that attribute, too. The flag is set when a USB MIDI device is still in the old MIDI 2.0 without UMP 1.1 support. Then the driver falls back to GTBs, and they are supposed to be static-only. Link: https://lore.kernel.org/r/20230612081054.17200-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-06-12 08:10:53 +00:00
/* GTB is static-only */
rmidi->ump->info.flags |= SNDRV_UMP_EP_INFO_STATIC_BLOCKS;
ALSA: usb-audio: Create UMP blocks from USB MIDI GTBs USB MIDI spec defines the Group Terminal Blocks (GTB) that associate multiple UMP Groups. Those correspond to snd_ump_block entities in ALSA UMP abstraction, and now we create those UMP Block objects for each UMP Endpoint from the parsed GTB information. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-13-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:33 +00:00
/* loop over GTBs */
for (dir = 0; dir < 2; dir++) {
if (!rmidi->eps[dir])
continue;
for (i = 0; i < rmidi->eps[dir]->ms_ep->bNumGrpTrmBlock; i++) {
blk = rmidi->eps[dir]->ms_ep->baAssoGrpTrmBlkID[i];
err = create_gtb_block(rmidi, dir, blk);
if (err < 0)
return err;
}
}
}
return 0;
}
ALSA: usb-audio: Enable the legacy raw MIDI support Attach the legacy rawmidi devices when enabled in Kconfig accordingly. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-16-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:36 +00:00
/* attach legacy rawmidis */
static int attach_legacy_rawmidi(struct snd_usb_midi2_interface *umidi)
{
#if IS_ENABLED(CONFIG_SND_UMP_LEGACY_RAWMIDI)
struct snd_usb_midi2_ump *rmidi;
int err;
list_for_each_entry(rmidi, &umidi->rawmidi_list, list) {
err = snd_ump_attach_legacy_rawmidi(rmidi->ump,
"Legacy MIDI",
umidi->chip->num_rawmidis);
if (err < 0)
return err;
umidi->chip->num_rawmidis++;
}
#endif
return 0;
}
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
static void snd_usb_midi_v2_free(struct snd_usb_midi2_interface *umidi)
{
free_all_midi2_endpoints(umidi);
free_all_midi2_umps(umidi);
list_del(&umidi->list);
kfree(umidi->blk_descs);
kfree(umidi);
}
/* parse the interface for MIDI 2.0 */
static int parse_midi_2_0(struct snd_usb_midi2_interface *umidi)
{
struct snd_usb_midi2_endpoint *ep;
int blk, id, err;
/* First, create an object for each USB MIDI Endpoint */
err = parse_midi_2_0_endpoints(umidi);
if (err < 0)
return err;
if (list_empty(&umidi->ep_list)) {
usb_audio_warn(umidi->chip, "No MIDI endpoints found\n");
return -ENODEV;
}
/*
* Next, look for EP I/O pairs that are found in group terminal blocks
* A UMP object is created for each EP I/O pair as bidirecitonal
* UMP EP
*/
list_for_each_entry(ep, &umidi->ep_list, list) {
/* only input in this loop; output is matched in find_midi_ump() */
if (ep->direction != STR_IN)
continue;
for (blk = 0; blk < ep->ms_ep->bNumGrpTrmBlock; blk++) {
id = ep->ms_ep->baAssoGrpTrmBlkID[blk];
err = find_matching_ep_partner(umidi, ep, id);
if (err < 0)
return err;
}
}
/*
* For the remaining EPs, treat as singles, create a UMP object with
* unidirectional EP
*/
list_for_each_entry(ep, &umidi->ep_list, list) {
if (ep->rmidi)
continue; /* already paired */
for (blk = 0; blk < ep->ms_ep->bNumGrpTrmBlock; blk++) {
id = ep->ms_ep->baAssoGrpTrmBlkID[blk];
if (find_midi2_ump(umidi, id))
continue;
usb_audio_dbg(umidi->chip,
"Creating a unidirection UMP for EP=0x%02x, blk=%d\n",
ep->endpoint, id);
if (ep->direction == STR_IN)
err = create_midi2_ump(umidi, ep, NULL, id);
else
err = create_midi2_ump(umidi, NULL, ep, id);
if (err < 0)
return err;
break;
}
}
ALSA: usb-audio: Attach legacy rawmidi after probing all UMP EPs The legacy rawmidi devices are the shadows of the main UMP devices, hence it's better to initialize them after all UMP Endpoints are parsed. Then, at the moment the legacy rawmidi is created, we already know the static flag or the proper EP name string, and we can fill those information at UMP core side instead of fiddling the attributes at a later point. Fixes: ec362b63c4b5 ("ALSA: usb-audio: Enable the legacy raw MIDI support") Link: https://lore.kernel.org/r/20230824075108.29958-2-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-08-24 07:51:05 +00:00
return 0;
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
}
/* is the given interface for MIDI 2.0? */
static bool is_midi2_altset(struct usb_host_interface *hostif)
{
struct usb_ms_header_descriptor *ms_header =
(struct usb_ms_header_descriptor *)hostif->extra;
if (hostif->extralen < 7 ||
ms_header->bLength < 7 ||
ms_header->bDescriptorType != USB_DT_CS_INTERFACE ||
ms_header->bDescriptorSubtype != UAC_HEADER)
return false;
return le16_to_cpu(ms_header->bcdMSC) == USB_MS_REV_MIDI_2_0;
}
/* change the altsetting */
static int set_altset(struct snd_usb_midi2_interface *umidi)
{
usb_audio_dbg(umidi->chip, "Setting host iface %d:%d\n",
umidi->hostif->desc.bInterfaceNumber,
umidi->hostif->desc.bAlternateSetting);
return usb_set_interface(umidi->chip->dev,
umidi->hostif->desc.bInterfaceNumber,
umidi->hostif->desc.bAlternateSetting);
}
ALSA: usb-audio: Get UMP EP name string from USB interface USB descriptor may provide a nicer name for USB interface, and we may take it as the UMP Endpoint name. The UMP EP name is copied as the rawmidi name, too. Also, fill the UMP block product_id field from the iSerialNumber string of the USB device descriptor as a recommended unique id, too. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-11-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:31 +00:00
/* fill UMP Endpoint name string from USB descriptor */
static void fill_ump_ep_name(struct snd_ump_endpoint *ump,
struct usb_device *dev, int id)
{
ALSA: usb-audio: Trim superfluous "MIDI" suffix from UMP EP name A single USB audio device may have multiple interfaces for different purposes (e.g. audio, MIDI and HID), where the iInterface descriptor of each interface may contain an own suffix, e.g. "MIDI" for a MIDI interface. as such a suffix is superfluous as a rawmidi and UMP Endpoint name, this patch trims the superfluous "MIDI" suffix from the name string. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-12-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:32 +00:00
int len;
ALSA: usb-audio: Get UMP EP name string from USB interface USB descriptor may provide a nicer name for USB interface, and we may take it as the UMP Endpoint name. The UMP EP name is copied as the rawmidi name, too. Also, fill the UMP block product_id field from the iSerialNumber string of the USB device descriptor as a recommended unique id, too. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-11-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:31 +00:00
usb_string(dev, id, ump->info.name, sizeof(ump->info.name));
ALSA: usb-audio: Trim superfluous "MIDI" suffix from UMP EP name A single USB audio device may have multiple interfaces for different purposes (e.g. audio, MIDI and HID), where the iInterface descriptor of each interface may contain an own suffix, e.g. "MIDI" for a MIDI interface. as such a suffix is superfluous as a rawmidi and UMP Endpoint name, this patch trims the superfluous "MIDI" suffix from the name string. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-12-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:32 +00:00
/* trim superfluous "MIDI" suffix */
len = strlen(ump->info.name);
if (len > 5 && !strcmp(ump->info.name + len - 5, " MIDI"))
ump->info.name[len - 5] = 0;
ALSA: usb-audio: Get UMP EP name string from USB interface USB descriptor may provide a nicer name for USB interface, and we may take it as the UMP Endpoint name. The UMP EP name is copied as the rawmidi name, too. Also, fill the UMP block product_id field from the iSerialNumber string of the USB device descriptor as a recommended unique id, too. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-11-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:31 +00:00
}
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
/* fill the fallback name string for each rawmidi instance */
static void set_fallback_rawmidi_names(struct snd_usb_midi2_interface *umidi)
{
ALSA: usb-audio: Get UMP EP name string from USB interface USB descriptor may provide a nicer name for USB interface, and we may take it as the UMP Endpoint name. The UMP EP name is copied as the rawmidi name, too. Also, fill the UMP block product_id field from the iSerialNumber string of the USB device descriptor as a recommended unique id, too. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-11-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:31 +00:00
struct usb_device *dev = umidi->chip->dev;
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
struct snd_usb_midi2_ump *rmidi;
ALSA: usb-audio: Get UMP EP name string from USB interface USB descriptor may provide a nicer name for USB interface, and we may take it as the UMP Endpoint name. The UMP EP name is copied as the rawmidi name, too. Also, fill the UMP block product_id field from the iSerialNumber string of the USB device descriptor as a recommended unique id, too. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-11-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:31 +00:00
struct snd_ump_endpoint *ump;
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
list_for_each_entry(rmidi, &umidi->rawmidi_list, list) {
ALSA: usb-audio: Get UMP EP name string from USB interface USB descriptor may provide a nicer name for USB interface, and we may take it as the UMP Endpoint name. The UMP EP name is copied as the rawmidi name, too. Also, fill the UMP block product_id field from the iSerialNumber string of the USB device descriptor as a recommended unique id, too. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-11-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:31 +00:00
ump = rmidi->ump;
/* fill UMP EP name from USB descriptors */
if (!*ump->info.name && umidi->hostif->desc.iInterface)
fill_ump_ep_name(ump, dev, umidi->hostif->desc.iInterface);
else if (!*ump->info.name && dev->descriptor.iProduct)
fill_ump_ep_name(ump, dev, dev->descriptor.iProduct);
/* fill fallback name */
if (!*ump->info.name)
sprintf(ump->info.name, "USB MIDI %d", rmidi->index);
/* copy as rawmidi name if not set */
if (!*ump->core.name)
strscpy(ump->core.name, ump->info.name,
sizeof(ump->core.name));
/* use serial number string as unique UMP product id */
if (!*ump->info.product_id && dev->descriptor.iSerialNumber)
usb_string(dev, dev->descriptor.iSerialNumber,
ump->info.product_id,
sizeof(ump->info.product_id));
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
}
}
/* create MIDI interface; fallback to MIDI 1.0 if needed */
int snd_usb_midi_v2_create(struct snd_usb_audio *chip,
struct usb_interface *iface,
const struct snd_usb_audio_quirk *quirk,
unsigned int usb_id)
{
struct snd_usb_midi2_interface *umidi;
struct usb_host_interface *hostif;
int err;
usb_audio_dbg(chip, "Parsing interface %d...\n",
iface->altsetting[0].desc.bInterfaceNumber);
/* fallback to MIDI 1.0? */
if (!midi2_enable) {
usb_audio_info(chip, "Falling back to MIDI 1.0 by module option\n");
goto fallback_to_midi1;
}
if ((quirk && quirk->type != QUIRK_MIDI_STANDARD_INTERFACE) ||
iface->num_altsetting < 2) {
ALSA: usb-audio: fix typo fix typo in midi fallback log. Signed-off-by: Jacob Siverskog <jacob@teenage.engineering> Fixes: ff49d1df79ae ("ALSA: usb-audio: USB MIDI 2.0 UMP support") Link: https://lore.kernel.org/r/20240124101827.35433-1-jacob@teenage.engineering Signed-off-by: Takashi Iwai <tiwai@suse.de>
2024-01-24 10:18:24 +00:00
usb_audio_info(chip, "Quirk or no altset; falling back to MIDI 1.0\n");
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
goto fallback_to_midi1;
}
hostif = &iface->altsetting[1];
if (!is_midi2_altset(hostif)) {
usb_audio_info(chip, "No MIDI 2.0 at altset 1, falling back to MIDI 1.0\n");
goto fallback_to_midi1;
}
if (!hostif->desc.bNumEndpoints) {
usb_audio_info(chip, "No endpoint at altset 1, falling back to MIDI 1.0\n");
goto fallback_to_midi1;
}
usb_audio_dbg(chip, "Creating a MIDI 2.0 instance for %d:%d\n",
hostif->desc.bInterfaceNumber,
hostif->desc.bAlternateSetting);
umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);
if (!umidi)
return -ENOMEM;
umidi->chip = chip;
umidi->iface = iface;
umidi->hostif = hostif;
INIT_LIST_HEAD(&umidi->rawmidi_list);
INIT_LIST_HEAD(&umidi->ep_list);
list_add_tail(&umidi->list, &chip->midi_v2_list);
err = set_altset(umidi);
if (err < 0) {
usb_audio_err(chip, "Failed to set altset\n");
goto error;
}
/* assume only altset 1 corresponding to MIDI 2.0 interface */
err = parse_midi_2_0(umidi);
if (err < 0) {
usb_audio_err(chip, "Failed to parse MIDI 2.0 interface\n");
goto error;
}
/* parse USB group terminal blocks */
err = parse_group_terminal_blocks(umidi);
if (err < 0) {
usb_audio_err(chip, "Failed to parse GTB\n");
goto error;
}
err = start_input_streams(umidi);
if (err < 0) {
usb_audio_err(chip, "Failed to start input streams\n");
goto error;
}
ALSA: usb-audio: Add midi2_ump_probe option Add a new option to enable/disable the UMP Endpoint probing. Some firmware seems screwed up when such a new command issued, and this option allows user to suppress it. Link: https://lore.kernel.org/r/20230612081054.17200-5-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-06-12 08:10:48 +00:00
if (midi2_ump_probe) {
err = parse_ump_endpoints(umidi);
if (err < 0) {
usb_audio_err(chip, "Failed to parse UMP endpoint\n");
goto error;
}
ALSA: usb-audio: Parse UMP Endpoint and Function Blocks at first Try to parse the UMP Endpoint and UMP Function Blocks for building the topology at first. Only when those are missing (e.g. on an older USB MIDI 2.0 spec or a unidirectional endpoint), the driver still creates blocks based on USB group terminal block information as fallback. Link: https://lore.kernel.org/r/20230612081054.17200-4-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-06-12 08:10:47 +00:00
}
ALSA: usb-audio: Create UMP blocks from USB MIDI GTBs USB MIDI spec defines the Group Terminal Blocks (GTB) that associate multiple UMP Groups. Those correspond to snd_ump_block entities in ALSA UMP abstraction, and now we create those UMP Block objects for each UMP Endpoint from the parsed GTB information. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-13-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:33 +00:00
err = create_blocks_from_gtb(umidi);
if (err < 0) {
usb_audio_err(chip, "Failed to create GTB blocks\n");
goto error;
}
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
set_fallback_rawmidi_names(umidi);
ALSA: usb-audio: Attach legacy rawmidi after probing all UMP EPs The legacy rawmidi devices are the shadows of the main UMP devices, hence it's better to initialize them after all UMP Endpoints are parsed. Then, at the moment the legacy rawmidi is created, we already know the static flag or the proper EP name string, and we can fill those information at UMP core side instead of fiddling the attributes at a later point. Fixes: ec362b63c4b5 ("ALSA: usb-audio: Enable the legacy raw MIDI support") Link: https://lore.kernel.org/r/20230824075108.29958-2-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-08-24 07:51:05 +00:00
err = attach_legacy_rawmidi(umidi);
if (err < 0) {
usb_audio_err(chip, "Failed to create legacy rawmidi\n");
goto error;
}
ALSA: usb-audio: USB MIDI 2.0 UMP support This patch provides a basic support for USB MIDI 2.0. As of this patch, the driver creates a UMP device per MIDI I/O endpoints, which serves as a dumb terminal to read/write UMP streams. A new Kconfig CONFIG_SND_USB_AUDIO_MIDI_V2 manages whether to enable or disable the MIDI 2.0 support. Also, the driver provides a new module option, midi2_enable, to allow disabling the MIDI 2.0 at runtime, too. When MIDI 2.0 support is disabled, the driver tries to fall back to the already existing MIDI 1.0 device (each MIDI 2.0 device is supposed to provide the MIDI 1.0 interface at the altset 0). For now, the driver doesn't manage any MIDI-CI or other protocol setups by itself, but relies on the default protocol given via the group terminal block descriptors. The MIDI 1.0 messages on MIDI 2.0 device will be automatically converted in ALSA sequencer in a later patch. As of this commit, the driver accepts merely the rawmidi UMP accesses. The driver builds up the topology in the following way: - Create an object for each MIDI endpoint belonging to the USB interface - Find MIDI EP "pairs" that share the same GTB; note that MIDI EP is unidirectional, while UMP is (normally) bidirectional, so two MIDI EPs can form a single UMP EP - A UMP endpoint object is created for each I/O pair - For remaining "solo" MIDI EPs, create unidirectional UMP EPs - Finally, parse GTBs and fill the protocol bits on each UMP So the driver may support multiple UMP Endpoints in theory, although most devices are supposed to have a single UMP EP that can contain up to 16 groups -- which should be large enough. Reviewed-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230523075358.9672-10-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-05-23 07:53:30 +00:00
return 0;
error:
snd_usb_midi_v2_free(umidi);
return err;
fallback_to_midi1:
return __snd_usbmidi_create(chip->card, iface, &chip->midi_list,
quirk, usb_id, &chip->num_rawmidis);
}
static void suspend_midi2_endpoint(struct snd_usb_midi2_endpoint *ep)
{
kill_midi_urbs(ep, true);
drain_urb_queue(ep);
}
void snd_usb_midi_v2_suspend_all(struct snd_usb_audio *chip)
{
struct snd_usb_midi2_interface *umidi;
struct snd_usb_midi2_endpoint *ep;
list_for_each_entry(umidi, &chip->midi_v2_list, list) {
list_for_each_entry(ep, &umidi->ep_list, list)
suspend_midi2_endpoint(ep);
}
}
static void resume_midi2_endpoint(struct snd_usb_midi2_endpoint *ep)
{
ep->running = ep->suspended;
if (ep->direction == STR_IN)
submit_io_urbs(ep);
/* FIXME: does it all? */
}
void snd_usb_midi_v2_resume_all(struct snd_usb_audio *chip)
{
struct snd_usb_midi2_interface *umidi;
struct snd_usb_midi2_endpoint *ep;
list_for_each_entry(umidi, &chip->midi_v2_list, list) {
set_altset(umidi);
list_for_each_entry(ep, &umidi->ep_list, list)
resume_midi2_endpoint(ep);
}
}
void snd_usb_midi_v2_disconnect_all(struct snd_usb_audio *chip)
{
struct snd_usb_midi2_interface *umidi;
struct snd_usb_midi2_endpoint *ep;
list_for_each_entry(umidi, &chip->midi_v2_list, list) {
umidi->disconnected = 1;
list_for_each_entry(ep, &umidi->ep_list, list) {
ep->disconnected = 1;
kill_midi_urbs(ep, false);
drain_urb_queue(ep);
}
}
}
/* release the MIDI instance */
void snd_usb_midi_v2_free_all(struct snd_usb_audio *chip)
{
struct snd_usb_midi2_interface *umidi, *next;
list_for_each_entry_safe(umidi, next, &chip->midi_v2_list, list)
snd_usb_midi_v2_free(umidi);
}
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