1 files changed, 360 insertions, 0 deletions
diff --git a/package/rt2x00/src/rt2x00debug.c b/package/rt2x00/src/rt2x00debug.c
new file mode 100644
index 0000000..cb61870
--- /dev/null
+++ b/package/rt2x00/src/rt2x00debug.c
@@ -0,0 +1,360 @@
+/*
+	Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
+	<http://rt2x00.serialmonkey.com>
+
+	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.
+ */
+
+/*
+	Module: rt2x00lib
+	Abstract: rt2x00 debugfs specific routines.
+	Supported chipsets: RT2460, RT2560, RT2570,
+	rt2561, rt2561s, rt2661, rt2571W & rt2671.
+ */
+
+#include <linux/debugfs.h>
+
+#include <asm/uaccess.h>
+
+#include "rt2x00.h"
+
+#define PRINT_REG8_STR		( "0x%.2x\n" )
+#define PRINT_REG16_STR		( "0x%.4x\n" )
+#define PRINT_REG32_STR		( "0x%.8x\n" )
+#define PRINT_REG_LEN_MAX	( 16 )
+#define PRINT_LINE_LEN_MAX	( 32 )
+
+struct rt2x00debug_intf {
+	/*
+	 * Pointer to driver structure where
+	 * this debugfs entry belongs to.
+	 */
+	struct rt2x00_dev *rt2x00dev;
+
+	/*
+	 * Reference to the rt2x00debug structure
+	 * which can be used to communicate with
+	 * the registers.
+	 */
+	const struct rt2x00debug *debug;
+
+	/*
+	 * Debugfs entries for:
+	 * - driver folder
+	 * - driver file
+	 * - chipset file
+	 * - register offset/value files
+	 * - eeprom offset/value files
+	 * - bbp offset/value files
+	 */
+	struct dentry *driver_folder;
+	struct dentry *driver_entry;
+	struct dentry *chipset_entry;
+	struct dentry *csr_off_entry;
+	struct dentry *csr_val_entry;
+	struct dentry *eeprom_off_entry;
+	struct dentry *eeprom_val_entry;
+	struct dentry *bbp_off_entry;
+	struct dentry *bbp_val_entry;
+
+	/*
+	 * Driver and chipset files will use a data buffer
+	 * that has been created in advance. This will simplify
+	 * the code since we can use the debugfs functions.
+	 */
+	struct debugfs_blob_wrapper driver_blob;
+	struct debugfs_blob_wrapper chipset_blob;
+
+	/*
+	 * Requested offset for each register type.
+	 */
+	unsigned int offset_csr;
+	unsigned int offset_eeprom;
+	unsigned int offset_bbp;
+};
+
+static int rt2x00debug_file_open(struct inode *inode, struct file *file)
+{
+	struct rt2x00debug_intf *intf = inode->i_private;
+
+	file->private_data = inode->i_private;
+
+	if (!try_module_get(intf->debug->owner))
+		return -EBUSY;
+
+	return 0;
+}
+
+static int rt2x00debug_file_release(struct inode *inode, struct file *file)
+{
+	struct rt2x00debug_intf *intf = file->private_data;
+
+	module_put(intf->debug->owner);
+
+	return 0;
+}
+
+static ssize_t rt2x00debug_file_read(void *device, char __user *buf,
+	loff_t *offset, unsigned int word, const struct rt2x00debug_reg *reg)
+{
+	unsigned long value;
+	unsigned int size;
+	char *line;
+
+	if (*offset)
+		return 0;
+
+	line = kzalloc(PRINT_REG_LEN_MAX, GFP_KERNEL);
+	if (!line)
+		return -ENOMEM;
+
+	reg->read(device, word, &value);
+
+	if (reg->word_size == sizeof(u8))
+		size = sprintf(line, PRINT_REG8_STR, (u8)value);
+	else if (reg->word_size == sizeof(u16))
+		size = sprintf(line, PRINT_REG16_STR, (u16)value);
+	else
+		size = sprintf(line, PRINT_REG32_STR, (u32)value);
+
+	if (copy_to_user(buf, line, size))
+		goto exit;
+
+	kfree(line);
+
+	*offset += size;
+	return size;
+
+exit:
+	kfree(line);
+
+	return -EFAULT;
+}
+
+static ssize_t rt2x00debug_file_write(void *device, const char __user *buf,
+	loff_t *offset, unsigned int word, unsigned int length,
+	const struct rt2x00debug_reg *reg)
+{
+	unsigned long value;
+	int size;
+	char *line;
+
+	line = kzalloc(length, GFP_KERNEL);
+	if (!line)
+		return -ENOMEM;
+
+	if (copy_from_user(line, buf, length))
+		goto exit;
+
+	size = strlen(line);
+	value = simple_strtoul(line, NULL, 0);
+
+	reg->write(device, word, &value);
+
+	kfree(line);
+
+	*offset += size;
+	return size;
+
+exit:
+	kfree(line);
+
+	return -EFAULT;
+}
+
+#define RT2X00DEBUGFS_OPS_READ(__name)					\
+	static ssize_t rt2x00debug_read_##__name(struct file *file,	\
+		char __user *buf, size_t length, loff_t *offset)	\
+	{								\
+		struct rt2x00debug_intf *intf =	file->private_data;	\
+		const struct rt2x00debug *debug = intf->debug;		\
+		const struct rt2x00debug_reg *reg = &debug->reg_##__name;\
+									\
+		if (intf->offset_##__name > reg->word_count)		\
+			return -EINVAL;					\
+									\
+		return rt2x00debug_file_read(intf->rt2x00dev, buf,	\
+			offset, intf->offset_##__name, reg);		\
+	}
+
+RT2X00DEBUGFS_OPS_READ(csr);
+RT2X00DEBUGFS_OPS_READ(eeprom);
+RT2X00DEBUGFS_OPS_READ(bbp);
+
+#define RT2X00DEBUGFS_OPS_WRITE(__name)					\
+	static ssize_t rt2x00debug_write_##__name(struct file *file,	\
+		const char __user *buf, size_t length, loff_t *offset)	\
+	{								\
+		struct rt2x00debug_intf *intf =	file->private_data;	\
+		const struct rt2x00debug *debug = intf->debug;		\
+		const struct rt2x00debug_reg *reg = &debug->reg_##__name;\
+									\
+		if (intf->offset_##__name > reg->word_count)		\
+			return -EINVAL;					\
+									\
+		return rt2x00debug_file_write(intf->rt2x00dev, buf,	\
+			offset, intf->offset_##__name, length, reg);	\
+	}
+
+RT2X00DEBUGFS_OPS_WRITE(csr);
+RT2X00DEBUGFS_OPS_WRITE(eeprom);
+RT2X00DEBUGFS_OPS_WRITE(bbp);
+
+#define RT2X00DEBUGFS_OPS(__name)					\
+	static const struct file_operations rt2x00debug_fop_##__name = {\
+		.owner		= THIS_MODULE,				\
+		.read		= rt2x00debug_read_##__name,		\
+		.write		= rt2x00debug_write_##__name,		\
+		.open		= rt2x00debug_file_open,		\
+		.release	= rt2x00debug_file_release,		\
+	};
+
+RT2X00DEBUGFS_OPS(csr);
+RT2X00DEBUGFS_OPS(eeprom);
+RT2X00DEBUGFS_OPS(bbp);
+
+static struct dentry *rt2x00debug_create_file_driver(const char *name,
+	struct rt2x00debug_intf *intf, struct debugfs_blob_wrapper *blob)
+{
+	char *data;
+
+	data = kzalloc(3 * PRINT_LINE_LEN_MAX, GFP_KERNEL);
+	if (!data)
+		return NULL;
+
+	blob->data = data;
+	data += sprintf(data, "driver: %s\n", intf->rt2x00dev->ops->name);
+	data += sprintf(data, "version: %s\n", DRV_VERSION);
+	data += sprintf(data, "compiled: %s %s\n", __DATE__, __TIME__);
+	blob->size = strlen(blob->data);
+
+	return debugfs_create_blob(name, S_IRUGO, intf->driver_folder, blob);
+}
+
+static struct dentry *rt2x00debug_create_file_chipset(const char *name,
+	struct rt2x00debug_intf *intf, struct debugfs_blob_wrapper *blob)
+{
+	const struct rt2x00debug *debug = intf->debug;
+	char *data;
+
+	data = kzalloc(3 * PRINT_LINE_LEN_MAX, GFP_KERNEL);
+	if (!data)
+		return NULL;
+
+	blob->data = data;
+	data += sprintf(data, "csr length: %d\n", debug->reg_csr.word_count);
+	data += sprintf(data, "eeprom length: %d\n",
+		debug->reg_eeprom.word_count);
+	data += sprintf(data, "bbp length: %d\n", debug->reg_bbp.word_count);
+	blob->size = strlen(blob->data);
+
+	return debugfs_create_blob(name, S_IRUGO, intf->driver_folder, blob);
+}
+
+void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
+{
+	const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
+	struct rt2x00debug_intf *intf;
+
+	intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
+	if (!intf) {
+		ERROR(rt2x00dev, "Failed to allocate debug handler.\n");
+		return;
+	}
+
+	intf->debug = debug;
+	intf->rt2x00dev = rt2x00dev;
+	rt2x00dev->debugfs_intf = intf;
+
+	intf->driver_folder = debugfs_create_dir(intf->rt2x00dev->ops->name,
+		rt2x00dev->hw->wiphy->debugfsdir);
+	if (IS_ERR(intf->driver_folder))
+		goto exit;
+
+	intf->driver_entry = rt2x00debug_create_file_driver("driver",
+		intf, &intf->driver_blob);
+	if (IS_ERR(intf->driver_entry))
+		goto exit;
+
+	intf->chipset_entry = rt2x00debug_create_file_chipset("chipset",
+		intf, &intf->chipset_blob);
+	if (IS_ERR(intf->chipset_entry))
+		goto exit;
+
+	intf->csr_off_entry = debugfs_create_u32("csr_offset",
+		S_IRUGO | S_IWUSR, intf->driver_folder, &intf->offset_csr);
+	if (IS_ERR(intf->csr_off_entry))
+		goto exit;
+
+	intf->csr_val_entry = debugfs_create_file("csr_value",
+		S_IRUGO | S_IWUSR, intf->driver_folder, intf,
+		&rt2x00debug_fop_csr);
+	if (IS_ERR(intf->csr_val_entry))
+		goto exit;
+
+	intf->eeprom_off_entry = debugfs_create_u32("eeprom_offset",
+		S_IRUGO | S_IWUSR, intf->driver_folder, &intf->offset_eeprom);
+	if (IS_ERR(intf->eeprom_off_entry))
+		goto exit;
+
+	intf->eeprom_val_entry = debugfs_create_file("eeprom_value",
+		S_IRUGO | S_IWUSR, intf->driver_folder, intf,
+		&rt2x00debug_fop_eeprom);
+	if (IS_ERR(intf->eeprom_val_entry))
+		goto exit;
+
+	intf->bbp_off_entry = debugfs_create_u32("bbp_offset",
+		S_IRUGO | S_IWUSR, intf->driver_folder, &intf->offset_bbp);
+	if (IS_ERR(intf->bbp_off_entry))
+		goto exit;
+
+	intf->bbp_val_entry = debugfs_create_file("bbp_value",
+		S_IRUGO | S_IWUSR, intf->driver_folder, intf,
+		&rt2x00debug_fop_bbp);
+	if (IS_ERR(intf->bbp_val_entry))
+		goto exit;
+
+	return;
+
+exit:
+	rt2x00debug_deregister(rt2x00dev);
+	ERROR(rt2x00dev, "Failed to register debug handler.\n");
+
+	return;
+}
+
+void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
+{
+	const struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
+
+	if (unlikely(!intf))
+		return;
+
+	debugfs_remove(intf->bbp_val_entry);
+	debugfs_remove(intf->bbp_off_entry);
+	debugfs_remove(intf->eeprom_val_entry);
+	debugfs_remove(intf->eeprom_off_entry);
+	debugfs_remove(intf->csr_val_entry);
+	debugfs_remove(intf->csr_off_entry);
+	debugfs_remove(intf->chipset_entry);
+	debugfs_remove(intf->driver_entry);
+	debugfs_remove(intf->driver_folder);
+	kfree(intf->chipset_blob.data);
+	kfree(intf->driver_blob.data);
+	kfree(intf);
+
+	rt2x00dev->debugfs_intf = NULL;
+}