3 files changed, 85 insertions, 8 deletions

diff --git a/drivers/hid/hid-wiimote-core.c b/drivers/hid/hid-wiimote-core.c
index 919abbaba840..2fd2f0337b8d 100644
--- a/drivers/hid/hid-wiimote-core.c
+++ b/drivers/hid/hid-wiimote-core.c
@@ -320,14 +320,8 @@ static void wiiproto_req_wmem(struct wiimote_data *wdata, bool eeprom,
 	wiimote_queue(wdata, cmd, sizeof(cmd));
 }
 
-#define wiiproto_req_rreg(wdata, os, sz) \
-				wiiproto_req_rmem((wdata), false, (os), (sz))
-
-#define wiiproto_req_reeprom(wdata, os, sz) \
-				wiiproto_req_rmem((wdata), true, (os), (sz))
-
-static void wiiproto_req_rmem(struct wiimote_data *wdata, bool eeprom,
-						__u32 offset, __u16 size)
+void wiiproto_req_rmem(struct wiimote_data *wdata, bool eeprom, __u32 offset,
+								__u16 size)
 {
 	__u8 cmd[7];
 
diff --git a/drivers/hid/hid-wiimote-debug.c b/drivers/hid/hid-wiimote-debug.c
index 6282e3c1a362..f81243c86790 100644
--- a/drivers/hid/hid-wiimote-debug.c
+++ b/drivers/hid/hid-wiimote-debug.c
@@ -10,12 +10,80 @@
  * any later version.
  */
 
+#include <linux/debugfs.h>
 #include <linux/module.h>
 #include <linux/spinlock.h>
+#include <linux/uaccess.h>
 #include "hid-wiimote.h"
 
 struct wiimote_debug {
 	struct wiimote_data *wdata;
+	struct dentry *eeprom;
+};
+
+static int wiidebug_eeprom_open(struct inode *i, struct file *f)
+{
+	f->private_data = i->i_private;
+	return 0;
+}
+
+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;
+
+	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 = wiidebug_eeprom_open,
+	.read = wiidebug_eeprom_read,
+	.llseek = generic_file_llseek,
 };
 
 int wiidebug_init(struct wiimote_data *wdata)
@@ -29,6 +97,13 @@ int wiidebug_init(struct wiimote_data *wdata)
 
 	dbg->wdata = wdata;
 
+	dbg->eeprom = debugfs_create_file("eeprom", S_IRUSR,
+		dbg->wdata->hdev->debug_dir, dbg, &wiidebug_eeprom_fops);
+	if (!dbg->eeprom) {
+		kfree(dbg);
+		return -ENOMEM;
+	}
+
 	spin_lock_irqsave(&wdata->state.lock, flags);
 	wdata->debug = dbg;
 	spin_unlock_irqrestore(&wdata->state.lock, flags);
@@ -48,5 +123,6 @@ void wiidebug_deinit(struct wiimote_data *wdata)
 	wdata->debug = NULL;
 	spin_unlock_irqrestore(&wdata->state.lock, flags);
 
+	debugfs_remove(dbg->eeprom);
 	kfree(dbg);
 }
diff --git a/drivers/hid/hid-wiimote.h b/drivers/hid/hid-wiimote.h
index 89b8851dbf1f..7b6765797f81 100644
--- a/drivers/hid/hid-wiimote.h
+++ b/drivers/hid/hid-wiimote.h
@@ -120,6 +120,13 @@ extern int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,
 extern ssize_t wiimote_cmd_read(struct wiimote_data *wdata, __u32 offset,
 							__u8 *rmem, __u8 size);
 
+#define wiiproto_req_rreg(wdata, os, sz) \
+				wiiproto_req_rmem((wdata), false, (os), (sz))
+#define wiiproto_req_reeprom(wdata, os, sz) \
+				wiiproto_req_rmem((wdata), true, (os), (sz))
+extern void wiiproto_req_rmem(struct wiimote_data *wdata, bool eeprom,
+						__u32 offset, __u16 size);
+
 #ifdef CONFIG_HID_WIIMOTE_EXT
 
 extern int wiiext_init(struct wiimote_data *wdata);