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path: root/drivers/usb/gadget/function/f_midi.c
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Diffstat (limited to 'drivers/usb/gadget/function/f_midi.c')
-rw-r--r--drivers/usb/gadget/function/f_midi.c73
1 files changed, 60 insertions, 13 deletions
diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c
index a5719f271bf0..4eb96b91cc40 100644
--- a/drivers/usb/gadget/function/f_midi.c
+++ b/drivers/usb/gadget/function/f_midi.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* f_midi.c -- USB MIDI class function driver
*
@@ -15,8 +16,6 @@
* and drivers/usb/gadget/midi.c,
* Copyright (C) 2006 Thumtronics Pty Ltd.
* Ben Williamson <ben.williamson@greyinnovation.com>
- *
- * Licensed under the GPL-2 or later.
*/
#include <linux/kernel.h>
@@ -98,6 +97,7 @@ struct f_midi {
DECLARE_KFIFO_PTR(in_req_fifo, struct usb_request *);
spinlock_t transmit_lock;
unsigned int in_last_port;
+ unsigned char free_ref;
struct gmidi_in_port in_ports_array[/* in_ports */];
};
@@ -108,6 +108,7 @@ static inline struct f_midi *func_to_midi(struct usb_function *f)
}
static void f_midi_transmit(struct f_midi *midi);
+static void f_midi_rmidi_free(struct snd_rawmidi *rmidi);
DECLARE_UAC_AC_HEADER_DESCRIPTOR(1);
DECLARE_USB_MIDI_OUT_JACK_DESCRIPTOR(1);
@@ -163,6 +164,13 @@ static struct usb_endpoint_descriptor bulk_out_desc = {
.bmAttributes = USB_ENDPOINT_XFER_BULK,
};
+static struct usb_ss_ep_comp_descriptor bulk_out_ss_comp_desc = {
+ .bLength = sizeof(bulk_out_ss_comp_desc),
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+ /* .bMaxBurst = 0, */
+ /* .bmAttributes = 0, */
+};
+
/* B.5.2 Class-specific MS Bulk OUT Endpoint Descriptor */
static struct usb_ms_endpoint_descriptor_16 ms_out_desc = {
/* .bLength = DYNAMIC */
@@ -180,6 +188,13 @@ static struct usb_endpoint_descriptor bulk_in_desc = {
.bmAttributes = USB_ENDPOINT_XFER_BULK,
};
+static struct usb_ss_ep_comp_descriptor bulk_in_ss_comp_desc = {
+ .bLength = sizeof(bulk_in_ss_comp_desc),
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+ /* .bMaxBurst = 0, */
+ /* .bmAttributes = 0, */
+};
+
/* B.6.2 Class-specific MS Bulk IN Endpoint Descriptor */
static struct usb_ms_endpoint_descriptor_16 ms_in_desc = {
/* .bLength = DYNAMIC */
@@ -755,13 +770,13 @@ static void f_midi_out_trigger(struct snd_rawmidi_substream *substream, int up)
clear_bit(substream->number, &midi->out_triggered);
}
-static struct snd_rawmidi_ops gmidi_in_ops = {
+static const struct snd_rawmidi_ops gmidi_in_ops = {
.open = f_midi_in_open,
.close = f_midi_in_close,
.trigger = f_midi_in_trigger,
};
-static struct snd_rawmidi_ops gmidi_out_ops = {
+static const struct snd_rawmidi_ops gmidi_out_ops = {
.open = f_midi_out_open,
.close = f_midi_out_close,
.trigger = f_midi_out_trigger
@@ -818,6 +833,8 @@ static int f_midi_register_card(struct f_midi *midi)
SNDRV_RAWMIDI_INFO_INPUT |
SNDRV_RAWMIDI_INFO_DUPLEX;
rmidi->private_data = midi;
+ rmidi->private_free = f_midi_rmidi_free;
+ midi->free_ref++;
/*
* Yes, rawmidi OUTPUT = USB IN, and rawmidi INPUT = USB OUT.
@@ -853,7 +870,7 @@ static int f_midi_bind(struct usb_configuration *c, struct usb_function *f)
struct usb_composite_dev *cdev = c->cdev;
struct f_midi *midi = func_to_midi(f);
struct usb_string *us;
- int status, n, jack = 1, i = 0;
+ int status, n, jack = 1, i = 0, endpoint_descriptor_index = 0;
midi->gadget = cdev->gadget;
tasklet_init(&midi->tasklet, f_midi_in_tasklet, (unsigned long) midi);
@@ -895,7 +912,7 @@ static int f_midi_bind(struct usb_configuration *c, struct usb_function *f)
goto fail;
/* allocate temporary function list */
- midi_function = kcalloc((MAX_PORTS * 4) + 9, sizeof(*midi_function),
+ midi_function = kcalloc((MAX_PORTS * 4) + 11, sizeof(*midi_function),
GFP_KERNEL);
if (!midi_function) {
status = -ENOMEM;
@@ -985,6 +1002,7 @@ static int f_midi_bind(struct usb_configuration *c, struct usb_function *f)
ms_in_desc.bNumEmbMIDIJack = midi->out_ports;
/* ... and add them to the list */
+ endpoint_descriptor_index = i;
midi_function[i++] = (struct usb_descriptor_header *) &bulk_out_desc;
midi_function[i++] = (struct usb_descriptor_header *) &ms_out_desc;
midi_function[i++] = (struct usb_descriptor_header *) &bulk_in_desc;
@@ -1009,13 +1027,34 @@ static int f_midi_bind(struct usb_configuration *c, struct usb_function *f)
goto fail_f_midi;
}
+ if (gadget_is_superspeed(c->cdev->gadget)) {
+ bulk_in_desc.wMaxPacketSize = cpu_to_le16(1024);
+ bulk_out_desc.wMaxPacketSize = cpu_to_le16(1024);
+ i = endpoint_descriptor_index;
+ midi_function[i++] = (struct usb_descriptor_header *)
+ &bulk_out_desc;
+ midi_function[i++] = (struct usb_descriptor_header *)
+ &bulk_out_ss_comp_desc;
+ midi_function[i++] = (struct usb_descriptor_header *)
+ &ms_out_desc;
+ midi_function[i++] = (struct usb_descriptor_header *)
+ &bulk_in_desc;
+ midi_function[i++] = (struct usb_descriptor_header *)
+ &bulk_in_ss_comp_desc;
+ midi_function[i++] = (struct usb_descriptor_header *)
+ &ms_in_desc;
+ f->ss_descriptors = usb_copy_descriptors(midi_function);
+ if (!f->ss_descriptors)
+ goto fail_f_midi;
+ }
+
kfree(midi_function);
return 0;
fail_f_midi:
kfree(midi_function);
- usb_free_descriptors(f->hs_descriptors);
+ usb_free_all_descriptors(f);
fail:
f_midi_unregister_card(midi);
fail_register:
@@ -1149,7 +1188,7 @@ static struct configfs_attribute *midi_attrs[] = {
NULL,
};
-static struct config_item_type midi_func_type = {
+static const struct config_item_type midi_func_type = {
.ct_item_ops = &midi_item_ops,
.ct_attrs = midi_attrs,
.ct_owner = THIS_MODULE,
@@ -1197,14 +1236,21 @@ static void f_midi_free(struct usb_function *f)
midi = func_to_midi(f);
opts = container_of(f->fi, struct f_midi_opts, func_inst);
- kfree(midi->id);
mutex_lock(&opts->lock);
- kfifo_free(&midi->in_req_fifo);
- kfree(midi);
- --opts->refcnt;
+ if (!--midi->free_ref) {
+ kfree(midi->id);
+ kfifo_free(&midi->in_req_fifo);
+ kfree(midi);
+ --opts->refcnt;
+ }
mutex_unlock(&opts->lock);
}
+static void f_midi_rmidi_free(struct snd_rawmidi *rmidi)
+{
+ f_midi_free(rmidi->private_data);
+}
+
static void f_midi_unbind(struct usb_configuration *c, struct usb_function *f)
{
struct usb_composite_dev *cdev = f->config->cdev;
@@ -1219,7 +1265,7 @@ static void f_midi_unbind(struct usb_configuration *c, struct usb_function *f)
card = midi->card;
midi->card = NULL;
if (card)
- snd_card_free(card);
+ snd_card_free_when_closed(card);
usb_free_all_descriptors(f);
}
@@ -1263,6 +1309,7 @@ static struct usb_function *f_midi_alloc(struct usb_function_instance *fi)
midi->buflen = opts->buflen;
midi->qlen = opts->qlen;
midi->in_last_port = 0;
+ midi->free_ref = 1;
status = kfifo_alloc(&midi->in_req_fifo, midi->qlen, GFP_KERNEL);
if (status)
generated by cgit v1.2.3 (git 2.46.0) at 2025-09-08 06:45:17 +0000