Add initializer and deinitializer for debugfs support. This will later allow raw
eeprom access and direct DRM modifications to debug wiimote behaviour and
further protocol reverse-engineerings.
Signed-off-by: David Herrmann <dh.herrmann@xxxxxxxxxxxxxx>
---
drivers/hid/Makefile | 3 ++
drivers/hid/hid-wiimote-core.c | 5 +++
drivers/hid/hid-wiimote-debug.c | 52 +++++++++++++++++++++++++++++++++++++++
drivers/hid/hid-wiimote.h | 13 +++++++++
4 files changed, 73 insertions(+), 0 deletions(-)
create mode 100644 drivers/hid/hid-wiimote-debug.c
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 57d46e6..adbc933 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -29,6 +29,9 @@ hid-wiimote-y := hid-wiimote-core.o
ifdef CONFIG_HID_WIIMOTE_EXT
hid-wiimote-y += hid-wiimote-ext.o
endif
+ifdef CONFIG_DEBUG_FS
+ hid-wiimote-y += hid-wiimote-debug.o
+endif
obj-$(CONFIG_HID_A4TECH) += hid-a4tech.o
obj-$(CONFIG_HID_ACRUX) += hid-axff.o
diff --git a/drivers/hid/hid-wiimote-core.c b/drivers/hid/hid-wiimote-core.c
index d8ed1ec..919abba 100644
--- a/drivers/hid/hid-wiimote-core.c
+++ b/drivers/hid/hid-wiimote-core.c
@@ -1161,6 +1161,7 @@ err:
static void wiimote_destroy(struct wiimote_data *wdata)
{
+ wiidebug_deinit(wdata);
wiiext_deinit(wdata);
wiimote_leds_destroy(wdata);
@@ -1237,6 +1238,10 @@ static int wiimote_hid_probe(struct hid_device *hdev,
if (ret)
goto err_free;
+ ret = wiidebug_init(wdata);
+ if (ret)
+ goto err_free;
+
hid_info(hdev, "New device registered\n");
/* by default set led1 after device initialization */
diff --git a/drivers/hid/hid-wiimote-debug.c b/drivers/hid/hid-wiimote-debug.c
new file mode 100644
index 0000000..6282e3c
--- /dev/null
+++ b/drivers/hid/hid-wiimote-debug.c
@@ -0,0 +1,52 @@
+/*
+ * Debug support for HID Nintendo Wiimote devices
+ * Copyright (c) 2011 David Herrmann
+ */
+
+/*
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include "hid-wiimote.h"
+
+struct wiimote_debug {
+ struct wiimote_data *wdata;
+};
+
+int wiidebug_init(struct wiimote_data *wdata)
+{
+ struct wiimote_debug *dbg;
+ unsigned long flags;
+
+ dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
+ if (!dbg)
+ return -ENOMEM;
+
+ dbg->wdata = wdata;
+
+ spin_lock_irqsave(&wdata->state.lock, flags);
+ wdata->debug = dbg;
+ spin_unlock_irqrestore(&wdata->state.lock, flags);
+
+ return 0;
+}
+
+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);
+
+ kfree(dbg);
+}
diff --git a/drivers/hid/hid-wiimote.h b/drivers/hid/hid-wiimote.h
index 1f3e53a..89b8851 100644
--- a/drivers/hid/hid-wiimote.h
+++ b/drivers/hid/hid-wiimote.h
@@ -74,6 +74,7 @@ struct wiimote_data {
struct input_dev *ir;
struct power_supply battery;
struct wiimote_ext *ext;
+ struct wiimote_debug *debug;
spinlock_t qlock;
__u8 head;
@@ -137,6 +138,18 @@ static inline void wiiext_handle(void *u, const __u8 *p) { }
#endif
+#ifdef CONFIG_DEBUG_FS
+
+extern int wiidebug_init(struct wiimote_data *wdata);
+extern void wiidebug_deinit(struct wiimote_data *wdata);
+
+#else
+
+static inline int wiidebug_init(void *u) { return 0; }
+static inline void wiidebug_deinit(void *u) { }
+
+#endif
+
/* requires the state.lock spinlock to be held */
static inline bool wiimote_cmd_pending(struct wiimote_data *wdata, int cmd,
__u32 opt)
--
1.7.7.3
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