# --- T2-COPYRIGHT-NOTE-BEGIN ---
# T2 SDE: architecture/powerpc64/package/*/0060-ps3avmgr-char-device.patch
# Copyright (C) 2019 - 2023 The T2 SDE Project
# 
# This Copyright note is generated by scripts/Create-CopyPatch,
# more information can be found in the files COPYING and README.
# 
# This patch file is dual-licensed. It is available under the license the
# patched project is licensed under, as long as it is an OpenSource license
# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
# of the GNU General Public License version 2 as used by the T2 SDE.
# --- T2-COPYRIGHT-NOTE-END ---

--- ./drivers/ps3/ps3av.c.vanilla	2023-08-06 14:50:30.299167412 +0200
+++ ./drivers/ps3/ps3av.c	2023-08-06 14:50:40.239167596 +0200
@@ -13,6 +13,9 @@
 #include <linux/ioctl.h>
 #include <linux/fb.h>
 #include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/miscdevice.h>
+#include <linux/fs.h>
 
 #include <asm/firmware.h>
 #include <asm/ps3av.h>
@@ -23,6 +25,8 @@
 #define BUFSIZE          4096	/* vuart buf size */
 #define PS3AV_BUF_SIZE   512	/* max packet size */
 
+#define DEVICE_NAME	"ps3avmngr"
+
 static int safe_mode;
 
 static int timeout = 5000;	/* in msec ( 5 sec ) */
@@ -47,6 +51,8 @@ static struct ps3av {
 		struct ps3av_reply_hdr reply_hdr;
 		u8 raw[PS3AV_BUF_SIZE];
 	} recv_buf;
+	struct miscdevice misc;
+	int misc_ok;
 } *ps3av;
 
 /* color space */
@@ -919,6 +925,68 @@ int ps3av_audio_mute(int mute)
 }
 EXPORT_SYMBOL_GPL(ps3av_audio_mute);
 
+static ssize_t ps3av_misc_read(struct file *file, char __user *usrbuf,
+			       size_t count, loff_t *pos)
+{
+	char *buf;
+	int result;
+
+	buf = kmalloc(count, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	result = ps3_vuart_read(ps3av->dev, buf, count);
+	if (result)
+		goto out;
+
+	if (copy_to_user(usrbuf, buf, count)) {
+		result = -EFAULT;
+		goto out;
+	}
+
+	result = count;
+
+out:
+
+	kfree(buf);
+
+	return result;
+}
+
+static ssize_t ps3av_misc_write(struct file *file, const char __user *usrbuf,
+				size_t count, loff_t *pos)
+{
+	char *buf;
+	int result;
+
+	buf = kmalloc(count, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	if (copy_from_user(buf, usrbuf, count)) {
+		result = -EFAULT;
+		goto out;
+	}
+
+	result = ps3_vuart_write(ps3av->dev, buf, count);
+	if (result)
+		goto out;
+
+	result = count;
+
+out:
+
+	kfree(buf);
+
+	return result;
+}
+
+static const struct file_operations ps3av_misc_fops = {
+	.owner		= THIS_MODULE,
+	.read	= ps3av_misc_read,
+	.write	= ps3av_misc_write,
+};
+
 static int ps3av_probe(struct ps3_system_bus_device *dev)
 {
 	int res;
@@ -985,11 +1053,34 @@ static int ps3av_probe(struct ps3_system_bus_device *dev)
 	ps3av->ps3av_mode = id;
 	mutex_unlock(&ps3av->mutex);
 
+	ps3av->misc.parent = &dev->core;
+	ps3av->misc.minor = MISC_DYNAMIC_MINOR,
+	ps3av->misc.name = DEVICE_NAME,
+	ps3av->misc.fops = &ps3av_misc_fops,
+
+	res = misc_register(&ps3av->misc);
+	if (res) {
+		dev_err(&dev->core, "%s:%u: misc_register failed %d\n",
+				    __func__, __LINE__, res);
+		goto skip_misc;
+	}
+
+	ps3av->misc_ok = 1;
+
+	dev_info(&dev->core, "%s:%u: registered misc device %d\n",
+		             __func__, __LINE__, ps3av->misc.minor);
+
+skip_misc:
+
 	dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
 
 	return 0;
 
 fail:
+
+	if (ps3av->misc_ok)
+		misc_deregister(&ps3av->misc);
+
 	kfree(ps3av);
 	ps3av = NULL;
 	return res;
@@ -999,6 +1090,9 @@ static int ps3av_remove(struct ps3_system_bus_device *dev)
 {
 	dev_dbg(&dev->core, " -> %s:%d\n", __func__, __LINE__);
 	if (ps3av) {
+		if (ps3av->misc_ok)
+			misc_deregister(&ps3av->misc);
+
 		ps3av_cmd_fin();
 		flush_work(&ps3av->work);
 		kfree(ps3av);