drivers/net/wireless/bcm43xx/bcm43xx_debugfs.c - LeafOS-Devices/android_kernel_samsung_gta4xl - Gitiles

 /*

   Broadcom BCM43xx wireless driver

   debugfs driver debugging code

   Copyright (c) 2005 Michael Buesch <mbuesch@freenet.de>

   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; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
   Boston, MA 02110-1301, USA.

 */


 #include <linux/fs.h>
 #include <linux/debugfs.h>
 #include <linux/slab.h>
 #include <linux/netdevice.h>
 #include <linux/pci.h>
 #include <asm/io.h>

 #include "bcm43xx.h"
 #include "bcm43xx_main.h"
 #include "bcm43xx_debugfs.h"
 #include "bcm43xx_dma.h"
 #include "bcm43xx_pio.h"

 #define REALLY_BIG_BUFFER_SIZE	(1024*256)

 static struct bcm43xx_debugfs fs;
 static char really_big_buffer[REALLY_BIG_BUFFER_SIZE];
 static DECLARE_MUTEX(big_buffer_sem);


 static ssize_t write_file_dummy(struct file *file, const char __user *buf,
 				size_t count, loff_t *ppos)
 {
 	return count;
 }

 static int open_file_generic(struct inode *inode, struct file *file)
 {
 	file->private_data = inode->u.generic_ip;
 	return 0;
 }

 #define fappend(fmt, x...)	pos += snprintf(buf + pos, len - pos, fmt , ##x)

 static ssize_t devinfo_read_file(struct file *file, char __user *userbuf,
 				 size_t count, loff_t *ppos)
 {
 	const size_t len = REALLY_BIG_BUFFER_SIZE;

 	struct bcm43xx_private *bcm = file->private_data;
 	char *buf = really_big_buffer;
 	size_t pos = 0;
 	ssize_t res;
 	struct net_device *net_dev;
 	struct pci_dev *pci_dev;
 	unsigned long flags;
 	u16 tmp16;
 	int i;

 	down(&big_buffer_sem);

 	spin_lock_irqsave(&bcm->lock, flags);
 	if (!bcm->initialized) {
 		fappend("Board not initialized.\n");
 		goto out;
 	}
 	net_dev = bcm->net_dev;
 	pci_dev = bcm->pci_dev;

 	/* This is where the information is written to the "devinfo" file */
 	fappend("*** %s devinfo ***\n", net_dev->name);
 	fappend("vendor:           0x%04x   device:           0x%04x\n",
 		pci_dev->vendor, pci_dev->device);
 	fappend("subsystem_vendor: 0x%04x   subsystem_device: 0x%04x\n",
 		pci_dev->subsystem_vendor, pci_dev->subsystem_device);
 	fappend("IRQ: %d\n", bcm->irq);
 	fappend("mmio_addr: 0x%p   mmio_len: %u\n", bcm->mmio_addr, bcm->mmio_len);
 	fappend("chip_id: 0x%04x   chip_rev: 0x%02x\n", bcm->chip_id, bcm->chip_rev);
 	if ((bcm->core_80211[0].rev >= 3) && (bcm43xx_read32(bcm, 0x0158) & (1 << 16)))
 		fappend("Radio disabled by hardware!\n");
 	if ((bcm->core_80211[0].rev < 3) && !(bcm43xx_read16(bcm, 0x049A) & (1 << 4)))
 		fappend("Radio disabled by hardware!\n");
 	fappend("board_vendor: 0x%04x   board_type: 0x%04x\n", bcm->board_vendor,
 	        bcm->board_type);

 	fappend("\nCores:\n");
 #define fappend_core(name, info) fappend("core \"" name "\" %s, %s, id: 0x%04x, "	\
 					 "rev: 0x%02x, index: 0x%02x\n",		\
 					 (info).flags & BCM43xx_COREFLAG_AVAILABLE	\
 						? "available" : "nonavailable",		\
 					 (info).flags & BCM43xx_COREFLAG_ENABLED	\
 						? "enabled" : "disabled",		\
 					 (info).id, (info).rev, (info).index)
 	fappend_core("CHIPCOMMON", bcm->core_chipcommon);
 	fappend_core("PCI", bcm->core_pci);
 	fappend_core("V90", bcm->core_v90);
 	fappend_core("PCMCIA", bcm->core_pcmcia);
 	fappend_core("ETHERNET", bcm->core_ethernet);
 	fappend_core("first 80211", bcm->core_80211[0]);
 	fappend_core("second 80211", bcm->core_80211[1]);
 #undef fappend_core
 	tmp16 = bcm43xx_read16(bcm, BCM43xx_MMIO_GPIO_CONTROL);
 	fappend("LEDs: ");
 	for (i = 0; i < BCM43xx_NR_LEDS; i++)
 		fappend("%d ", !!(tmp16 & (1 << i)));
 	fappend("\n");

 out:
 	spin_unlock_irqrestore(&bcm->lock, flags);
 	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
 	up(&big_buffer_sem);
 	return res;
 }

 static ssize_t drvinfo_read_file(struct file *file, char __user *userbuf,
 				 size_t count, loff_t *ppos)
 {
 	const size_t len = REALLY_BIG_BUFFER_SIZE;

 	char *buf = really_big_buffer;
 	size_t pos = 0;
 	ssize_t res;

 	down(&big_buffer_sem);

 	/* This is where the information is written to the "driver" file */
 	fappend(BCM43xx_DRIVER_NAME "\n");
 	fappend("Compiled at: %s %s\n", __DATE__, __TIME__);

 	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
 	up(&big_buffer_sem);
 	return res;
 }

 static ssize_t spromdump_read_file(struct file *file, char __user *userbuf,
 				 size_t count, loff_t *ppos)
 {
 	const size_t len = REALLY_BIG_BUFFER_SIZE;

 	struct bcm43xx_private *bcm = file->private_data;
 	char *buf = really_big_buffer;
 	size_t pos = 0;
 	ssize_t res;
 	unsigned long flags;

 	down(&big_buffer_sem);
 	spin_lock_irqsave(&bcm->lock, flags);
 	if (!bcm->initialized) {
 		fappend("Board not initialized.\n");
 		goto out;
 	}

 	/* This is where the information is written to the "sprom_dump" file */
 	fappend("boardflags: 0x%04x\n", bcm->sprom.boardflags);

 out:
 	spin_unlock_irqrestore(&bcm->lock, flags);
 	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
 	up(&big_buffer_sem);
 	return res;
 }

 static ssize_t tsf_read_file(struct file *file, char __user *userbuf,
 			     size_t count, loff_t *ppos)
 {
 	const size_t len = REALLY_BIG_BUFFER_SIZE;

 	struct bcm43xx_private *bcm = file->private_data;
 	char *buf = really_big_buffer;
 	size_t pos = 0;
 	ssize_t res;
 	unsigned long flags;
 	u64 tsf;

 	down(&big_buffer_sem);
 	spin_lock_irqsave(&bcm->lock, flags);
 	if (!bcm->initialized) {
 		fappend("Board not initialized.\n");
 		goto out;
 	}
 	bcm43xx_tsf_read(bcm, &tsf);
 	fappend("0x%08x%08x\n",
 		(unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
 		(unsigned int)(tsf & 0xFFFFFFFFULL));

 out:
 	spin_unlock_irqrestore(&bcm->lock, flags);
 	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
 	up(&big_buffer_sem);
 	return res;
 }

 static ssize_t tsf_write_file(struct file *file, const char __user *user_buf,
 			      size_t count, loff_t *ppos)
 {
 	struct bcm43xx_private *bcm = file->private_data;
 	char *buf = really_big_buffer;
 	ssize_t buf_size;
 	ssize_t res;
 	unsigned long flags;
 	u64 tsf;

 	buf_size = min(count, sizeof (really_big_buffer) - 1);
 	down(&big_buffer_sem);
 	if (copy_from_user(buf, user_buf, buf_size)) {
 	        res = -EFAULT;
 		goto out_up;
 	}
 	spin_lock_irqsave(&bcm->lock, flags);
 	if (!bcm->initialized) {
 		printk(KERN_INFO PFX "debugfs: Board not initialized.\n");
 		res = -EFAULT;
 		goto out_unlock;
 	}
 	if (sscanf(buf, "%lli", &tsf) != 1) {
 		printk(KERN_INFO PFX "debugfs: invalid values for \"tsf\"\n");
 		res = -EINVAL;
 		goto out_unlock;
 	}
 	bcm43xx_tsf_write(bcm, tsf);
 	res = buf_size;

 out_unlock:
 	spin_unlock_irqrestore(&bcm->lock, flags);
 out_up:
 	up(&big_buffer_sem);
 	return res;
 }

 static ssize_t txstat_read_file(struct file *file, char __user *userbuf,
 				size_t count, loff_t *ppos)
 {
 	const size_t len = REALLY_BIG_BUFFER_SIZE;

 	struct bcm43xx_private *bcm = file->private_data;
 	char *buf = really_big_buffer;
 	size_t pos = 0;
 	ssize_t res;
 	unsigned long flags;
 	struct bcm43xx_dfsentry *e;
 	struct bcm43xx_xmitstatus *status;
 	int i, cnt, j = 0;

 	down(&big_buffer_sem);
 	spin_lock_irqsave(&bcm->lock, flags);

 	fappend("Last %d logged xmitstatus blobs (Latest first):\n\n",
 		BCM43xx_NR_LOGGED_XMITSTATUS);
 	e = bcm->dfsentry;
 	if (e->xmitstatus_printing == 0) {
 		/* At the beginning, make a copy of all data to avoid
 		 * concurrency, as this function is called multiple
 		 * times for big logs. Without copying, the data might
 		 * change between reads. This would result in total trash.
 		 */
 		e->xmitstatus_printing = 1;
 		e->saved_xmitstatus_ptr = e->xmitstatus_ptr;
 		e->saved_xmitstatus_cnt = e->xmitstatus_cnt;
 		memcpy(e->xmitstatus_print_buffer, e->xmitstatus_buffer,
 		       BCM43xx_NR_LOGGED_XMITSTATUS * sizeof(*(e->xmitstatus_buffer)));
 	}
 	i = e->saved_xmitstatus_ptr - 1;
 	if (i < 0)
 		i = BCM43xx_NR_LOGGED_XMITSTATUS - 1;
 	cnt = e->saved_xmitstatus_cnt;
 	while (cnt) {
 		status = e->xmitstatus_print_buffer + i;
 		fappend("0x%02x:   cookie: 0x%04x,  flags: 0x%02x,  "
 			"cnt1: 0x%02x,  cnt2: 0x%02x,  seq: 0x%04x,  "
 			"unk: 0x%04x\n", j,
 			status->cookie, status->flags,
 			status->cnt1, status->cnt2, status->seq,
 			status->unknown);
 		j++;
 		cnt--;
 		i--;
 		if (i < 0)
 			i = BCM43xx_NR_LOGGED_XMITSTATUS - 1;
 	}

 	spin_unlock_irqrestore(&bcm->lock, flags);
 	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
 	spin_lock_irqsave(&bcm->lock, flags);
 	if (*ppos == pos) {
 		/* Done. Drop the copied data. */
 		e->xmitstatus_printing = 0;
 	}
 	spin_unlock_irqrestore(&bcm->lock, flags);
 	up(&big_buffer_sem);
 	return res;
 }

 #undef fappend


 static struct file_operations devinfo_fops = {
 	.read = devinfo_read_file,
 	.write = write_file_dummy,
 	.open = open_file_generic,
 };

 static struct file_operations spromdump_fops = {
 	.read = spromdump_read_file,
 	.write = write_file_dummy,
 	.open = open_file_generic,
 };

 static struct file_operations drvinfo_fops = {
 	.read = drvinfo_read_file,
 	.write = write_file_dummy,
 	.open = open_file_generic,
 };

 static struct file_operations tsf_fops = {
 	.read = tsf_read_file,
 	.write = tsf_write_file,
 	.open = open_file_generic,
 };

 static struct file_operations txstat_fops = {
 	.read = txstat_read_file,
 	.write = write_file_dummy,
 	.open = open_file_generic,
 };


 void bcm43xx_debugfs_add_device(struct bcm43xx_private *bcm)
 {
 	struct bcm43xx_dfsentry *e;
 	char devdir[IFNAMSIZ];

 	assert(bcm);
 	e = kzalloc(sizeof(*e), GFP_KERNEL);
 	if (!e) {
 		printk(KERN_ERR PFX "out of memory\n");
 		return;
 	}
 	e->bcm = bcm;
 	e->xmitstatus_buffer = kzalloc(BCM43xx_NR_LOGGED_XMITSTATUS
 				       * sizeof(*(e->xmitstatus_buffer)),
 				       GFP_KERNEL);
 	if (!e->xmitstatus_buffer) {
 		printk(KERN_ERR PFX "out of memory\n");
 		kfree(e);
 		return;
 	}
 	e->xmitstatus_print_buffer = kzalloc(BCM43xx_NR_LOGGED_XMITSTATUS
 					     * sizeof(*(e->xmitstatus_buffer)),
 					     GFP_KERNEL);
 	if (!e->xmitstatus_print_buffer) {
 		printk(KERN_ERR PFX "out of memory\n");
 		kfree(e);
 		return;
 	}


 	bcm->dfsentry = e;

 	strncpy(devdir, bcm->net_dev->name, ARRAY_SIZE(devdir));
 	e->subdir = debugfs_create_dir(devdir, fs.root);
 	e->dentry_devinfo = debugfs_create_file("devinfo", 0444, e->subdir,
 						bcm, &devinfo_fops);
 	if (!e->dentry_devinfo)
 		printk(KERN_ERR PFX "debugfs: creating \"devinfo\" for \"%s\" failed!\n", devdir);
 	e->dentry_spromdump = debugfs_create_file("sprom_dump", 0444, e->subdir,
 						  bcm, &spromdump_fops);
 	if (!e->dentry_spromdump)
 		printk(KERN_ERR PFX "debugfs: creating \"sprom_dump\" for \"%s\" failed!\n", devdir);
 	e->dentry_tsf = debugfs_create_file("tsf", 0666, e->subdir,
 	                                    bcm, &tsf_fops);
 	if (!e->dentry_tsf)
 		printk(KERN_ERR PFX "debugfs: creating \"tsf\" for \"%s\" failed!\n", devdir);
 	e->dentry_txstat = debugfs_create_file("tx_status", 0444, e->subdir,
 						bcm, &txstat_fops);
 	if (!e->dentry_txstat)
 		printk(KERN_ERR PFX "debugfs: creating \"tx_status\" for \"%s\" failed!\n", devdir);
 }

 void bcm43xx_debugfs_remove_device(struct bcm43xx_private *bcm)
 {
 	struct bcm43xx_dfsentry *e;

 	if (!bcm)
 		return;

 	e = bcm->dfsentry;
 	assert(e);
 	debugfs_remove(e->dentry_spromdump);
 	debugfs_remove(e->dentry_devinfo);
 	debugfs_remove(e->dentry_tsf);
 	debugfs_remove(e->dentry_txstat);
 	debugfs_remove(e->subdir);
 	kfree(e->xmitstatus_buffer);
 	kfree(e->xmitstatus_print_buffer);
 	kfree(e);
 }

 void bcm43xx_debugfs_log_txstat(struct bcm43xx_private *bcm,
 				struct bcm43xx_xmitstatus *status)
 {
 	struct bcm43xx_dfsentry *e;
 	struct bcm43xx_xmitstatus *savedstatus;

 	/* This is protected by bcm->lock */
 	e = bcm->dfsentry;
 	assert(e);
 	savedstatus = e->xmitstatus_buffer + e->xmitstatus_ptr;
 	memcpy(savedstatus, status, sizeof(*status));
 	e->xmitstatus_ptr++;
 	if (e->xmitstatus_ptr >= BCM43xx_NR_LOGGED_XMITSTATUS)
 		e->xmitstatus_ptr = 0;
 	if (e->xmitstatus_cnt < BCM43xx_NR_LOGGED_XMITSTATUS)
 		e->xmitstatus_cnt++;
 }

 void bcm43xx_debugfs_init(void)
 {
 	memset(&fs, 0, sizeof(fs));
 	fs.root = debugfs_create_dir(DRV_NAME, NULL);
 	if (!fs.root)
 		printk(KERN_ERR PFX "debugfs: creating \"" DRV_NAME "\" subdir failed!\n");
 	fs.dentry_driverinfo = debugfs_create_file("driver", 0444, fs.root, NULL, &drvinfo_fops);
 	if (!fs.dentry_driverinfo)
 		printk(KERN_ERR PFX "debugfs: creating \"" DRV_NAME "/driver\" failed!\n");
 }

 void bcm43xx_debugfs_exit(void)
 {
 	debugfs_remove(fs.dentry_driverinfo);
 	debugfs_remove(fs.root);
 }

 void bcm43xx_printk_dump(const char *data,
 			 size_t size,
 			 const char *description)
 {
 	size_t i;
 	char c;

 	printk(KERN_INFO PFX "Data dump (%s, %u bytes):",
 	       description, size);
 	for (i = 0; i < size; i++) {
 		c = data[i];
 		if (i % 8 == 0)
 			printk("\n" KERN_INFO PFX "0x%08x:  0x%02x, ", i, c & 0xff);
 		else
 			printk("0x%02x, ", c & 0xff);
 	}
 	printk("\n");
 }

 void bcm43xx_printk_bitdump(const unsigned char *data,
 			    size_t bytes, int msb_to_lsb,
 			    const char *description)
 {
 	size_t i;
 	int j;
 	const unsigned char *d;

 	printk(KERN_INFO PFX "*** Bitdump (%s, %u bytes, %s) ***",
 	       description, bytes, msb_to_lsb ? "MSB to LSB" : "LSB to MSB");
 	for (i = 0; i < bytes; i++) {
 		d = data + i;
 		if (i % 8 == 0)
 			printk("\n" KERN_INFO PFX "0x%08x:  ", i);
 		if (msb_to_lsb) {
 			for (j = 7; j >= 0; j--) {
 				if (*d & (1 << j))
 					printk("1");
 				else
 					printk("0");
 			}
 		} else {
 			for (j = 0; j < 8; j++) {
 				if (*d & (1 << j))
 					printk("1");
 				else
 					printk("0");
 			}
 		}
 		printk(" ");
 	}
 	printk("\n");
 }

 /* vim: set ts=8 sw=8 sts=8: */
	/*

	Broadcom BCM43xx wireless driver

	debugfs driver debugging code

	Copyright (c) 2005 Michael Buesch <mbuesch@freenet.de>

	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; see the file COPYING. If not, write to
	the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
	Boston, MA 02110-1301, USA.

	*/



	#include <linux/fs.h>
	#include <linux/debugfs.h>
	#include <linux/slab.h>
	#include <linux/netdevice.h>
	#include <linux/pci.h>
	#include <asm/io.h>

	#include "bcm43xx.h"
	#include "bcm43xx_main.h"
	#include "bcm43xx_debugfs.h"
	#include "bcm43xx_dma.h"
	#include "bcm43xx_pio.h"

	#define REALLY_BIG_BUFFER_SIZE (1024*256)

	static struct bcm43xx_debugfs fs;
	static char really_big_buffer[REALLY_BIG_BUFFER_SIZE];
	static DECLARE_MUTEX(big_buffer_sem);


	static ssize_t write_file_dummy(struct file file, const char __user buf,
	size_t count, loff_t *ppos)
	{
	return count;
	}

	static int open_file_generic(struct inode inode, struct file file)
	{
	file->private_data = inode->u.generic_ip;
	return 0;
	}

	#define fappend(fmt, x...) pos += snprintf(buf + pos, len - pos, fmt , ##x)

	static ssize_t devinfo_read_file(struct file file, char __user userbuf,
	size_t count, loff_t *ppos)
	{
	const size_t len = REALLY_BIG_BUFFER_SIZE;

	struct bcm43xx_private *bcm = file->private_data;
	char *buf = really_big_buffer;
	size_t pos = 0;
	ssize_t res;
	struct net_device *net_dev;
	struct pci_dev *pci_dev;
	unsigned long flags;
	u16 tmp16;
	int i;

	down(&big_buffer_sem);

	spin_lock_irqsave(&bcm->lock, flags);
	if (!bcm->initialized) {
	fappend("Board not initialized.\n");
	goto out;
	}
	net_dev = bcm->net_dev;
	pci_dev = bcm->pci_dev;

	/* This is where the information is written to the "devinfo" file */
	fappend("* %s devinfo *\n", net_dev->name);
	fappend("vendor: 0x%04x device: 0x%04x\n",
	pci_dev->vendor, pci_dev->device);
	fappend("subsystem_vendor: 0x%04x subsystem_device: 0x%04x\n",
	pci_dev->subsystem_vendor, pci_dev->subsystem_device);
	fappend("IRQ: %d\n", bcm->irq);
	fappend("mmio_addr: 0x%p mmio_len: %u\n", bcm->mmio_addr, bcm->mmio_len);
	fappend("chip_id: 0x%04x chip_rev: 0x%02x\n", bcm->chip_id, bcm->chip_rev);
	if ((bcm->core_80211[0].rev >= 3) && (bcm43xx_read32(bcm, 0x0158) & (1 << 16)))
	fappend("Radio disabled by hardware!\n");
	if ((bcm->core_80211[0].rev < 3) && !(bcm43xx_read16(bcm, 0x049A) & (1 << 4)))
	fappend("Radio disabled by hardware!\n");
	fappend("board_vendor: 0x%04x board_type: 0x%04x\n", bcm->board_vendor,
	bcm->board_type);

	fappend("\nCores:\n");
	#define fappend_core(name, info) fappend("core \"" name "\" %s, %s, id: 0x%04x, " \
	"rev: 0x%02x, index: 0x%02x\n", \
	(info).flags & BCM43xx_COREFLAG_AVAILABLE \
	? "available" : "nonavailable", \
	(info).flags & BCM43xx_COREFLAG_ENABLED \
	? "enabled" : "disabled", \
	(info).id, (info).rev, (info).index)
	fappend_core("CHIPCOMMON", bcm->core_chipcommon);
	fappend_core("PCI", bcm->core_pci);
	fappend_core("V90", bcm->core_v90);
	fappend_core("PCMCIA", bcm->core_pcmcia);
	fappend_core("ETHERNET", bcm->core_ethernet);
	fappend_core("first 80211", bcm->core_80211[0]);
	fappend_core("second 80211", bcm->core_80211[1]);
	#undef fappend_core
	tmp16 = bcm43xx_read16(bcm, BCM43xx_MMIO_GPIO_CONTROL);
	fappend("LEDs: ");
	for (i = 0; i < BCM43xx_NR_LEDS; i++)
	fappend("%d ", !!(tmp16 & (1 << i)));
	fappend("\n");

	out:
	spin_unlock_irqrestore(&bcm->lock, flags);
	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	up(&big_buffer_sem);
	return res;
	}

	static ssize_t drvinfo_read_file(struct file file, char __user userbuf,
	size_t count, loff_t *ppos)
	{
	const size_t len = REALLY_BIG_BUFFER_SIZE;

	char *buf = really_big_buffer;
	size_t pos = 0;
	ssize_t res;

	down(&big_buffer_sem);

	/* This is where the information is written to the "driver" file */
	fappend(BCM43xx_DRIVER_NAME "\n");
	fappend("Compiled at: %s %s\n", __DATE__, __TIME__);

	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	up(&big_buffer_sem);
	return res;
	}

	static ssize_t spromdump_read_file(struct file file, char __user userbuf,
	size_t count, loff_t *ppos)
	{
	const size_t len = REALLY_BIG_BUFFER_SIZE;

	struct bcm43xx_private *bcm = file->private_data;
	char *buf = really_big_buffer;
	size_t pos = 0;
	ssize_t res;
	unsigned long flags;

	down(&big_buffer_sem);
	spin_lock_irqsave(&bcm->lock, flags);
	if (!bcm->initialized) {
	fappend("Board not initialized.\n");
	goto out;
	}

	/* This is where the information is written to the "sprom_dump" file */
	fappend("boardflags: 0x%04x\n", bcm->sprom.boardflags);

	out:
	spin_unlock_irqrestore(&bcm->lock, flags);
	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	up(&big_buffer_sem);
	return res;
	}

	static ssize_t tsf_read_file(struct file file, char __user userbuf,
	size_t count, loff_t *ppos)
	{
	const size_t len = REALLY_BIG_BUFFER_SIZE;

	struct bcm43xx_private *bcm = file->private_data;
	char *buf = really_big_buffer;
	size_t pos = 0;
	ssize_t res;
	unsigned long flags;
	u64 tsf;

	down(&big_buffer_sem);
	spin_lock_irqsave(&bcm->lock, flags);
	if (!bcm->initialized) {
	fappend("Board not initialized.\n");
	goto out;
	}
	bcm43xx_tsf_read(bcm, &tsf);
	fappend("0x%08x%08x\n",
	(unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
	(unsigned int)(tsf & 0xFFFFFFFFULL));

	out:
	spin_unlock_irqrestore(&bcm->lock, flags);
	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	up(&big_buffer_sem);
	return res;
	}

	static ssize_t tsf_write_file(struct file file, const char __user user_buf,
	size_t count, loff_t *ppos)
	{
	struct bcm43xx_private *bcm = file->private_data;
	char *buf = really_big_buffer;
	ssize_t buf_size;
	ssize_t res;
	unsigned long flags;
	u64 tsf;

	buf_size = min(count, sizeof (really_big_buffer) - 1);
	down(&big_buffer_sem);
	if (copy_from_user(buf, user_buf, buf_size)) {
	res = -EFAULT;
	goto out_up;
	}
	spin_lock_irqsave(&bcm->lock, flags);
	if (!bcm->initialized) {
	printk(KERN_INFO PFX "debugfs: Board not initialized.\n");
	res = -EFAULT;
	goto out_unlock;
	}
	if (sscanf(buf, "%lli", &tsf) != 1) {
	printk(KERN_INFO PFX "debugfs: invalid values for \"tsf\"\n");
	res = -EINVAL;
	goto out_unlock;
	}
	bcm43xx_tsf_write(bcm, tsf);
	res = buf_size;

	out_unlock:
	spin_unlock_irqrestore(&bcm->lock, flags);
	out_up:
	up(&big_buffer_sem);
	return res;
	}

	static ssize_t txstat_read_file(struct file file, char __user userbuf,
	size_t count, loff_t *ppos)
	{
	const size_t len = REALLY_BIG_BUFFER_SIZE;

	struct bcm43xx_private *bcm = file->private_data;
	char *buf = really_big_buffer;
	size_t pos = 0;
	ssize_t res;
	unsigned long flags;
	struct bcm43xx_dfsentry *e;
	struct bcm43xx_xmitstatus *status;
	int i, cnt, j = 0;

	down(&big_buffer_sem);
	spin_lock_irqsave(&bcm->lock, flags);

	fappend("Last %d logged xmitstatus blobs (Latest first):\n\n",
	BCM43xx_NR_LOGGED_XMITSTATUS);
	e = bcm->dfsentry;
	if (e->xmitstatus_printing == 0) {
	/* At the beginning, make a copy of all data to avoid
	* concurrency, as this function is called multiple
	* times for big logs. Without copying, the data might
	* change between reads. This would result in total trash.
	*/
	e->xmitstatus_printing = 1;
	e->saved_xmitstatus_ptr = e->xmitstatus_ptr;
	e->saved_xmitstatus_cnt = e->xmitstatus_cnt;
	memcpy(e->xmitstatus_print_buffer, e->xmitstatus_buffer,
	BCM43xx_NR_LOGGED_XMITSTATUS * sizeof(*(e->xmitstatus_buffer)));
	}
	i = e->saved_xmitstatus_ptr - 1;
	if (i < 0)
	i = BCM43xx_NR_LOGGED_XMITSTATUS - 1;
	cnt = e->saved_xmitstatus_cnt;
	while (cnt) {
	status = e->xmitstatus_print_buffer + i;
	fappend("0x%02x: cookie: 0x%04x, flags: 0x%02x, "
	"cnt1: 0x%02x, cnt2: 0x%02x, seq: 0x%04x, "
	"unk: 0x%04x\n", j,
	status->cookie, status->flags,
	status->cnt1, status->cnt2, status->seq,
	status->unknown);
	j++;
	cnt--;
	i--;
	if (i < 0)
	i = BCM43xx_NR_LOGGED_XMITSTATUS - 1;
	}

	spin_unlock_irqrestore(&bcm->lock, flags);
	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	spin_lock_irqsave(&bcm->lock, flags);
	if (*ppos == pos) {
	/* Done. Drop the copied data. */
	e->xmitstatus_printing = 0;
	}
	spin_unlock_irqrestore(&bcm->lock, flags);
	up(&big_buffer_sem);
	return res;
	}

	#undef fappend


	static struct file_operations devinfo_fops = {
	.read = devinfo_read_file,
	.write = write_file_dummy,
	.open = open_file_generic,
	};

	static struct file_operations spromdump_fops = {
	.read = spromdump_read_file,
	.write = write_file_dummy,
	.open = open_file_generic,
	};

	static struct file_operations drvinfo_fops = {
	.read = drvinfo_read_file,
	.write = write_file_dummy,
	.open = open_file_generic,
	};

	static struct file_operations tsf_fops = {
	.read = tsf_read_file,
	.write = tsf_write_file,
	.open = open_file_generic,
	};

	static struct file_operations txstat_fops = {
	.read = txstat_read_file,
	.write = write_file_dummy,
	.open = open_file_generic,
	};


	void bcm43xx_debugfs_add_device(struct bcm43xx_private *bcm)
	{
	struct bcm43xx_dfsentry *e;
	char devdir[IFNAMSIZ];

	assert(bcm);
	e = kzalloc(sizeof(*e), GFP_KERNEL);
	if (!e) {
	printk(KERN_ERR PFX "out of memory\n");
	return;
	}
	e->bcm = bcm;
	e->xmitstatus_buffer = kzalloc(BCM43xx_NR_LOGGED_XMITSTATUS
	* sizeof(*(e->xmitstatus_buffer)),
	GFP_KERNEL);
	if (!e->xmitstatus_buffer) {
	printk(KERN_ERR PFX "out of memory\n");
	kfree(e);
	return;
	}
	e->xmitstatus_print_buffer = kzalloc(BCM43xx_NR_LOGGED_XMITSTATUS
	* sizeof(*(e->xmitstatus_buffer)),
	GFP_KERNEL);
	if (!e->xmitstatus_print_buffer) {
	printk(KERN_ERR PFX "out of memory\n");
	kfree(e);
	return;
	}


	bcm->dfsentry = e;

	strncpy(devdir, bcm->net_dev->name, ARRAY_SIZE(devdir));
	e->subdir = debugfs_create_dir(devdir, fs.root);
	e->dentry_devinfo = debugfs_create_file("devinfo", 0444, e->subdir,
	bcm, &devinfo_fops);
	if (!e->dentry_devinfo)
	printk(KERN_ERR PFX "debugfs: creating \"devinfo\" for \"%s\" failed!\n", devdir);
	e->dentry_spromdump = debugfs_create_file("sprom_dump", 0444, e->subdir,
	bcm, &spromdump_fops);
	if (!e->dentry_spromdump)
	printk(KERN_ERR PFX "debugfs: creating \"sprom_dump\" for \"%s\" failed!\n", devdir);
	e->dentry_tsf = debugfs_create_file("tsf", 0666, e->subdir,
	bcm, &tsf_fops);
	if (!e->dentry_tsf)
	printk(KERN_ERR PFX "debugfs: creating \"tsf\" for \"%s\" failed!\n", devdir);
	e->dentry_txstat = debugfs_create_file("tx_status", 0444, e->subdir,
	bcm, &txstat_fops);
	if (!e->dentry_txstat)
	printk(KERN_ERR PFX "debugfs: creating \"tx_status\" for \"%s\" failed!\n", devdir);
	}

	void bcm43xx_debugfs_remove_device(struct bcm43xx_private *bcm)
	{
	struct bcm43xx_dfsentry *e;

	if (!bcm)
	return;

	e = bcm->dfsentry;
	assert(e);
	debugfs_remove(e->dentry_spromdump);
	debugfs_remove(e->dentry_devinfo);
	debugfs_remove(e->dentry_tsf);
	debugfs_remove(e->dentry_txstat);
	debugfs_remove(e->subdir);
	kfree(e->xmitstatus_buffer);
	kfree(e->xmitstatus_print_buffer);
	kfree(e);
	}

	void bcm43xx_debugfs_log_txstat(struct bcm43xx_private *bcm,
	struct bcm43xx_xmitstatus *status)
	{
	struct bcm43xx_dfsentry *e;
	struct bcm43xx_xmitstatus *savedstatus;

	/* This is protected by bcm->lock */
	e = bcm->dfsentry;
	assert(e);
	savedstatus = e->xmitstatus_buffer + e->xmitstatus_ptr;
	memcpy(savedstatus, status, sizeof(*status));
	e->xmitstatus_ptr++;
	if (e->xmitstatus_ptr >= BCM43xx_NR_LOGGED_XMITSTATUS)
	e->xmitstatus_ptr = 0;
	if (e->xmitstatus_cnt < BCM43xx_NR_LOGGED_XMITSTATUS)
	e->xmitstatus_cnt++;
	}

	void bcm43xx_debugfs_init(void)
	{
	memset(&fs, 0, sizeof(fs));
	fs.root = debugfs_create_dir(DRV_NAME, NULL);
	if (!fs.root)
	printk(KERN_ERR PFX "debugfs: creating \"" DRV_NAME "\" subdir failed!\n");
	fs.dentry_driverinfo = debugfs_create_file("driver", 0444, fs.root, NULL, &drvinfo_fops);
	if (!fs.dentry_driverinfo)
	printk(KERN_ERR PFX "debugfs: creating \"" DRV_NAME "/driver\" failed!\n");
	}

	void bcm43xx_debugfs_exit(void)
	{
	debugfs_remove(fs.dentry_driverinfo);
	debugfs_remove(fs.root);
	}

	void bcm43xx_printk_dump(const char *data,
	size_t size,
	const char *description)
	{
	size_t i;
	char c;

	printk(KERN_INFO PFX "Data dump (%s, %u bytes):",
	description, size);
	for (i = 0; i < size; i++) {
	c = data[i];
	if (i % 8 == 0)
	printk("\n" KERN_INFO PFX "0x%08x: 0x%02x, ", i, c & 0xff);
	else
	printk("0x%02x, ", c & 0xff);
	}
	printk("\n");
	}

	void bcm43xx_printk_bitdump(const unsigned char *data,
	size_t bytes, int msb_to_lsb,
	const char *description)
	{
	size_t i;
	int j;
	const unsigned char *d;

	printk(KERN_INFO PFX "* Bitdump (%s, %u bytes, %s) *",
	description, bytes, msb_to_lsb ? "MSB to LSB" : "LSB to MSB");
	for (i = 0; i < bytes; i++) {
	d = data + i;
	if (i % 8 == 0)
	printk("\n" KERN_INFO PFX "0x%08x: ", i);
	if (msb_to_lsb) {
	for (j = 7; j >= 0; j--) {
	if (*d & (1 << j))
	printk("1");
	else
	printk("0");
	}
	} else {
	for (j = 0; j < 8; j++) {
	if (*d & (1 << j))
	printk("1");
	else
	printk("0");
	}
	}
	printk(" ");
	}
	printk("\n");
	}

	/* vim: set ts=8 sw=8 sts=8: */