mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
222 lines
4.7 KiB
C
222 lines
4.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Debug support for HID Nintendo Wii / Wii U peripherals
|
|
* Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
|
|
*/
|
|
|
|
/*
|
|
*/
|
|
|
|
#include <linux/debugfs.h>
|
|
#include <linux/module.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/uaccess.h>
|
|
#include "hid-wiimote.h"
|
|
|
|
struct wiimote_debug {
|
|
struct wiimote_data *wdata;
|
|
struct dentry *eeprom;
|
|
struct dentry *drm;
|
|
};
|
|
|
|
static ssize_t wiidebug_eeprom_read(struct file *f, char __user *u, size_t s,
|
|
loff_t *off)
|
|
{
|
|
struct wiimote_debug *dbg = f->private_data;
|
|
struct wiimote_data *wdata = dbg->wdata;
|
|
unsigned long flags;
|
|
ssize_t ret;
|
|
char buf[16];
|
|
__u16 size = 0;
|
|
|
|
if (s == 0)
|
|
return -EINVAL;
|
|
if (*off > 0xffffff)
|
|
return 0;
|
|
if (s > 16)
|
|
s = 16;
|
|
|
|
ret = wiimote_cmd_acquire(wdata);
|
|
if (ret)
|
|
return ret;
|
|
|
|
spin_lock_irqsave(&wdata->state.lock, flags);
|
|
wdata->state.cmd_read_size = s;
|
|
wdata->state.cmd_read_buf = buf;
|
|
wiimote_cmd_set(wdata, WIIPROTO_REQ_RMEM, *off & 0xffff);
|
|
wiiproto_req_reeprom(wdata, *off, s);
|
|
spin_unlock_irqrestore(&wdata->state.lock, flags);
|
|
|
|
ret = wiimote_cmd_wait(wdata);
|
|
if (!ret)
|
|
size = wdata->state.cmd_read_size;
|
|
|
|
spin_lock_irqsave(&wdata->state.lock, flags);
|
|
wdata->state.cmd_read_buf = NULL;
|
|
spin_unlock_irqrestore(&wdata->state.lock, flags);
|
|
|
|
wiimote_cmd_release(wdata);
|
|
|
|
if (ret)
|
|
return ret;
|
|
else if (size == 0)
|
|
return -EIO;
|
|
|
|
if (copy_to_user(u, buf, size))
|
|
return -EFAULT;
|
|
|
|
*off += size;
|
|
ret = size;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations wiidebug_eeprom_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = simple_open,
|
|
.read = wiidebug_eeprom_read,
|
|
.llseek = generic_file_llseek,
|
|
};
|
|
|
|
static const char *wiidebug_drmmap[] = {
|
|
[WIIPROTO_REQ_NULL] = "NULL",
|
|
[WIIPROTO_REQ_DRM_K] = "K",
|
|
[WIIPROTO_REQ_DRM_KA] = "KA",
|
|
[WIIPROTO_REQ_DRM_KE] = "KE",
|
|
[WIIPROTO_REQ_DRM_KAI] = "KAI",
|
|
[WIIPROTO_REQ_DRM_KEE] = "KEE",
|
|
[WIIPROTO_REQ_DRM_KAE] = "KAE",
|
|
[WIIPROTO_REQ_DRM_KIE] = "KIE",
|
|
[WIIPROTO_REQ_DRM_KAIE] = "KAIE",
|
|
[WIIPROTO_REQ_DRM_E] = "E",
|
|
[WIIPROTO_REQ_DRM_SKAI1] = "SKAI1",
|
|
[WIIPROTO_REQ_DRM_SKAI2] = "SKAI2",
|
|
[WIIPROTO_REQ_MAX] = NULL
|
|
};
|
|
|
|
static int wiidebug_drm_show(struct seq_file *f, void *p)
|
|
{
|
|
struct wiimote_debug *dbg = f->private;
|
|
const char *str = NULL;
|
|
unsigned long flags;
|
|
__u8 drm;
|
|
|
|
spin_lock_irqsave(&dbg->wdata->state.lock, flags);
|
|
drm = dbg->wdata->state.drm;
|
|
spin_unlock_irqrestore(&dbg->wdata->state.lock, flags);
|
|
|
|
if (drm < WIIPROTO_REQ_MAX)
|
|
str = wiidebug_drmmap[drm];
|
|
if (!str)
|
|
str = "unknown";
|
|
|
|
seq_printf(f, "%s\n", str);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wiidebug_drm_open(struct inode *i, struct file *f)
|
|
{
|
|
return single_open(f, wiidebug_drm_show, i->i_private);
|
|
}
|
|
|
|
static ssize_t wiidebug_drm_write(struct file *f, const char __user *u,
|
|
size_t s, loff_t *off)
|
|
{
|
|
struct seq_file *sf = f->private_data;
|
|
struct wiimote_debug *dbg = sf->private;
|
|
unsigned long flags;
|
|
char buf[16];
|
|
ssize_t len;
|
|
int i;
|
|
|
|
if (s == 0)
|
|
return -EINVAL;
|
|
|
|
len = min((size_t) 15, s);
|
|
if (copy_from_user(buf, u, len))
|
|
return -EFAULT;
|
|
|
|
buf[len] = 0;
|
|
|
|
for (i = 0; i < WIIPROTO_REQ_MAX; ++i) {
|
|
if (!wiidebug_drmmap[i])
|
|
continue;
|
|
if (!strcasecmp(buf, wiidebug_drmmap[i]))
|
|
break;
|
|
}
|
|
|
|
if (i == WIIPROTO_REQ_MAX)
|
|
i = simple_strtoul(buf, NULL, 16);
|
|
|
|
spin_lock_irqsave(&dbg->wdata->state.lock, flags);
|
|
dbg->wdata->state.flags &= ~WIIPROTO_FLAG_DRM_LOCKED;
|
|
wiiproto_req_drm(dbg->wdata, (__u8) i);
|
|
if (i != WIIPROTO_REQ_NULL)
|
|
dbg->wdata->state.flags |= WIIPROTO_FLAG_DRM_LOCKED;
|
|
spin_unlock_irqrestore(&dbg->wdata->state.lock, flags);
|
|
|
|
return len;
|
|
}
|
|
|
|
static const struct file_operations wiidebug_drm_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = wiidebug_drm_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.write = wiidebug_drm_write,
|
|
.release = single_release,
|
|
};
|
|
|
|
int wiidebug_init(struct wiimote_data *wdata)
|
|
{
|
|
struct wiimote_debug *dbg;
|
|
unsigned long flags;
|
|
int ret = -ENOMEM;
|
|
|
|
dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
|
|
if (!dbg)
|
|
return -ENOMEM;
|
|
|
|
dbg->wdata = wdata;
|
|
|
|
dbg->eeprom = debugfs_create_file("eeprom", S_IRUSR,
|
|
dbg->wdata->hdev->debug_dir, dbg, &wiidebug_eeprom_fops);
|
|
if (!dbg->eeprom)
|
|
goto err;
|
|
|
|
dbg->drm = debugfs_create_file("drm", S_IRUSR,
|
|
dbg->wdata->hdev->debug_dir, dbg, &wiidebug_drm_fops);
|
|
if (!dbg->drm)
|
|
goto err_drm;
|
|
|
|
spin_lock_irqsave(&wdata->state.lock, flags);
|
|
wdata->debug = dbg;
|
|
spin_unlock_irqrestore(&wdata->state.lock, flags);
|
|
|
|
return 0;
|
|
|
|
err_drm:
|
|
debugfs_remove(dbg->eeprom);
|
|
err:
|
|
kfree(dbg);
|
|
return ret;
|
|
}
|
|
|
|
void wiidebug_deinit(struct wiimote_data *wdata)
|
|
{
|
|
struct wiimote_debug *dbg = wdata->debug;
|
|
unsigned long flags;
|
|
|
|
if (!dbg)
|
|
return;
|
|
|
|
spin_lock_irqsave(&wdata->state.lock, flags);
|
|
wdata->debug = NULL;
|
|
spin_unlock_irqrestore(&wdata->state.lock, flags);
|
|
|
|
debugfs_remove(dbg->drm);
|
|
debugfs_remove(dbg->eeprom);
|
|
kfree(dbg);
|
|
}
|