From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/sound/core/rawmidi.c | 181 ++++++++++++++++++++++++++++++++------------
1 files changed, 130 insertions(+), 51 deletions(-)
diff --git a/kernel/sound/core/rawmidi.c b/kernel/sound/core/rawmidi.c
index f4f855d..0d91143 100644
--- a/kernel/sound/core/rawmidi.c
+++ b/kernel/sound/core/rawmidi.c
@@ -1,22 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Abstract layer for MIDI v1.0 stream
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
- *
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
*/
#include <sound/core.h>
@@ -50,7 +35,7 @@
MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device.");
#endif /* CONFIG_SND_OSSEMUL */
-static int snd_rawmidi_free(struct snd_rawmidi *rawmidi);
+static int snd_rawmidi_free(struct snd_rawmidi *rmidi);
static int snd_rawmidi_dev_free(struct snd_device *device);
static int snd_rawmidi_dev_register(struct snd_device *device);
static int snd_rawmidi_dev_disconnect(struct snd_device *device);
@@ -64,6 +49,29 @@
dev_warn(&(rmidi)->dev, fmt, ##args)
#define rmidi_dbg(rmidi, fmt, args...) \
dev_dbg(&(rmidi)->dev, fmt, ##args)
+
+struct snd_rawmidi_status32 {
+ s32 stream;
+ s32 tstamp_sec; /* Timestamp */
+ s32 tstamp_nsec;
+ u32 avail; /* available bytes */
+ u32 xruns; /* count of overruns since last status (in bytes) */
+ unsigned char reserved[16]; /* reserved for future use */
+};
+
+#define SNDRV_RAWMIDI_IOCTL_STATUS32 _IOWR('W', 0x20, struct snd_rawmidi_status32)
+
+struct snd_rawmidi_status64 {
+ int stream;
+ u8 rsvd[4]; /* alignment */
+ s64 tstamp_sec; /* Timestamp */
+ s64 tstamp_nsec;
+ size_t avail; /* available bytes */
+ size_t xruns; /* count of overruns since last status (in bytes) */
+ unsigned char reserved[16]; /* reserved for future use */
+};
+
+#define SNDRV_RAWMIDI_IOCTL_STATUS64 _IOWR('W', 0x20, struct snd_rawmidi_status64)
static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device)
{
@@ -262,7 +270,7 @@
{
struct snd_rawmidi_substream *substream;
struct snd_rawmidi_str *s = &rmidi->streams[stream];
- static unsigned int info_flags[2] = {
+ static const unsigned int info_flags[2] = {
[SNDRV_RAWMIDI_STREAM_OUTPUT] = SNDRV_RAWMIDI_INFO_OUTPUT,
[SNDRV_RAWMIDI_STREAM_INPUT] = SNDRV_RAWMIDI_INFO_INPUT,
};
@@ -403,7 +411,7 @@
if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK))
return -EINVAL; /* invalid combination */
- err = nonseekable_open(inode, file);
+ err = stream_open(inode, file);
if (err < 0)
return err;
@@ -718,7 +726,7 @@
EXPORT_SYMBOL(snd_rawmidi_input_params);
static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream,
- struct snd_rawmidi_status *status)
+ struct snd_rawmidi_status64 *status)
{
struct snd_rawmidi_runtime *runtime = substream->runtime;
@@ -731,7 +739,7 @@
}
static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream,
- struct snd_rawmidi_status *status)
+ struct snd_rawmidi_status64 *status)
{
struct snd_rawmidi_runtime *runtime = substream->runtime;
@@ -742,6 +750,80 @@
status->xruns = runtime->xruns;
runtime->xruns = 0;
spin_unlock_irq(&runtime->lock);
+ return 0;
+}
+
+static int snd_rawmidi_ioctl_status32(struct snd_rawmidi_file *rfile,
+ struct snd_rawmidi_status32 __user *argp)
+{
+ int err = 0;
+ struct snd_rawmidi_status32 __user *status = argp;
+ struct snd_rawmidi_status32 status32;
+ struct snd_rawmidi_status64 status64;
+
+ if (copy_from_user(&status32, argp,
+ sizeof(struct snd_rawmidi_status32)))
+ return -EFAULT;
+
+ switch (status32.stream) {
+ case SNDRV_RAWMIDI_STREAM_OUTPUT:
+ if (rfile->output == NULL)
+ return -EINVAL;
+ err = snd_rawmidi_output_status(rfile->output, &status64);
+ break;
+ case SNDRV_RAWMIDI_STREAM_INPUT:
+ if (rfile->input == NULL)
+ return -EINVAL;
+ err = snd_rawmidi_input_status(rfile->input, &status64);
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (err < 0)
+ return err;
+
+ status32 = (struct snd_rawmidi_status32) {
+ .stream = status64.stream,
+ .tstamp_sec = status64.tstamp_sec,
+ .tstamp_nsec = status64.tstamp_nsec,
+ .avail = status64.avail,
+ .xruns = status64.xruns,
+ };
+
+ if (copy_to_user(status, &status32, sizeof(*status)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int snd_rawmidi_ioctl_status64(struct snd_rawmidi_file *rfile,
+ struct snd_rawmidi_status64 __user *argp)
+{
+ int err = 0;
+ struct snd_rawmidi_status64 status;
+
+ if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status64)))
+ return -EFAULT;
+
+ switch (status.stream) {
+ case SNDRV_RAWMIDI_STREAM_OUTPUT:
+ if (rfile->output == NULL)
+ return -EINVAL;
+ err = snd_rawmidi_output_status(rfile->output, &status);
+ break;
+ case SNDRV_RAWMIDI_STREAM_INPUT:
+ if (rfile->input == NULL)
+ return -EINVAL;
+ err = snd_rawmidi_input_status(rfile->input, &status);
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (err < 0)
+ return err;
+ if (copy_to_user(argp, &status,
+ sizeof(struct snd_rawmidi_status64)))
+ return -EFAULT;
return 0;
}
@@ -791,33 +873,10 @@
return -EINVAL;
}
}
- case SNDRV_RAWMIDI_IOCTL_STATUS:
- {
- int err = 0;
- struct snd_rawmidi_status status;
-
- if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status)))
- return -EFAULT;
- switch (status.stream) {
- case SNDRV_RAWMIDI_STREAM_OUTPUT:
- if (rfile->output == NULL)
- return -EINVAL;
- err = snd_rawmidi_output_status(rfile->output, &status);
- break;
- case SNDRV_RAWMIDI_STREAM_INPUT:
- if (rfile->input == NULL)
- return -EINVAL;
- err = snd_rawmidi_input_status(rfile->input, &status);
- break;
- default:
- return -EINVAL;
- }
- if (err < 0)
- return err;
- if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status)))
- return -EFAULT;
- return 0;
- }
+ case SNDRV_RAWMIDI_IOCTL_STATUS32:
+ return snd_rawmidi_ioctl_status32(rfile, argp);
+ case SNDRV_RAWMIDI_IOCTL_STATUS64:
+ return snd_rawmidi_ioctl_status64(rfile, argp);
case SNDRV_RAWMIDI_IOCTL_DROP:
{
int val;
@@ -1271,6 +1330,28 @@
}
EXPORT_SYMBOL(snd_rawmidi_transmit);
+/**
+ * snd_rawmidi_proceed - Discard the all pending bytes and proceed
+ * @substream: rawmidi substream
+ *
+ * Return: the number of discarded bytes
+ */
+int snd_rawmidi_proceed(struct snd_rawmidi_substream *substream)
+{
+ struct snd_rawmidi_runtime *runtime = substream->runtime;
+ unsigned long flags;
+ int count = 0;
+
+ spin_lock_irqsave(&runtime->lock, flags);
+ if (runtime->avail < runtime->buffer_size) {
+ count = runtime->buffer_size - runtime->avail;
+ __snd_rawmidi_transmit_ack(substream, count);
+ }
+ spin_unlock_irqrestore(&runtime->lock, flags);
+ return count;
+}
+EXPORT_SYMBOL(snd_rawmidi_proceed);
+
static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
const unsigned char __user *userbuf,
const unsigned char *kernelbuf,
@@ -1584,7 +1665,7 @@
{
struct snd_rawmidi *rmidi;
int err;
- static struct snd_device_ops ops = {
+ static const struct snd_device_ops ops = {
.dev_free = snd_rawmidi_dev_free,
.dev_register = snd_rawmidi_dev_register,
.dev_disconnect = snd_rawmidi_dev_disconnect,
@@ -1655,10 +1736,8 @@
snd_info_free_entry(rmidi->proc_entry);
rmidi->proc_entry = NULL;
- mutex_lock(®ister_mutex);
if (rmidi->ops && rmidi->ops->dev_unregister)
rmidi->ops->dev_unregister(rmidi);
- mutex_unlock(®ister_mutex);
snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);
--
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