debugfs.c

linux内核源码

				CMD_OPTION_WAITFORRSP, 0, &offval);
	mdelay(10);

	res = count;
out_unlock:
	free_page(addr);
	return res;
}

static ssize_t libertas_rdbbp_read(struct file *file, char __user *userbuf,
				  size_t count, loff_t *ppos)
{
	wlan_private *priv = file->private_data;
	wlan_adapter *adapter = priv->adapter;
	struct wlan_offset_value offval;
	ssize_t pos = 0;
	int ret;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;

	offval.offset = priv->bbp_offset;
	offval.value = 0;

	ret = libertas_prepare_and_send_command(priv,
				CMD_BBP_REG_ACCESS, 0,
				CMD_OPTION_WAITFORRSP, 0, &offval);
	mdelay(10);
	pos += snprintf(buf+pos, len-pos, "BBP[0x%x] = 0x%08x\n",
				priv->bbp_offset, adapter->offsetvalue.value);

	ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	free_page(addr);

	return ret;
}

static ssize_t libertas_rdbbp_write(struct file *file,
				    const char __user *userbuf,
				    size_t count, loff_t *ppos)
{
	wlan_private *priv = file->private_data;
	ssize_t res, buf_size;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;

	buf_size = min(count, len - 1);
	if (copy_from_user(buf, userbuf, buf_size)) {
		res = -EFAULT;
		goto out_unlock;
	}
	priv->bbp_offset = simple_strtoul((char *)buf, NULL, 16);
	res = count;
out_unlock:
	free_page(addr);
	return res;
}

static ssize_t libertas_wrbbp_write(struct file *file,
				    const char __user *userbuf,
				    size_t count, loff_t *ppos)
{

	wlan_private *priv = file->private_data;
	ssize_t res, buf_size;
	u32 offset, value;
	struct wlan_offset_value offval;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;

	buf_size = min(count, len - 1);
	if (copy_from_user(buf, userbuf, buf_size)) {
		res = -EFAULT;
		goto out_unlock;
	}
	res = sscanf(buf, "%x %x", &offset, &value);
	if (res != 2) {
		res = -EFAULT;
		goto out_unlock;
	}

	offval.offset = offset;
	offval.value = value;
	res = libertas_prepare_and_send_command(priv,
				CMD_BBP_REG_ACCESS, 1,
				CMD_OPTION_WAITFORRSP, 0, &offval);
	mdelay(10);

	res = count;
out_unlock:
	free_page(addr);
	return res;
}

static ssize_t libertas_rdrf_read(struct file *file, char __user *userbuf,
				  size_t count, loff_t *ppos)
{
	wlan_private *priv = file->private_data;
	wlan_adapter *adapter = priv->adapter;
	struct wlan_offset_value offval;
	ssize_t pos = 0;
	int ret;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;

	offval.offset = priv->rf_offset;
	offval.value = 0;

	ret = libertas_prepare_and_send_command(priv,
				CMD_RF_REG_ACCESS, 0,
				CMD_OPTION_WAITFORRSP, 0, &offval);
	mdelay(10);
	pos += snprintf(buf+pos, len-pos, "RF[0x%x] = 0x%08x\n",
				priv->rf_offset, adapter->offsetvalue.value);

	ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	free_page(addr);

	return ret;
}

static ssize_t libertas_rdrf_write(struct file *file,
				    const char __user *userbuf,
				    size_t count, loff_t *ppos)
{
	wlan_private *priv = file->private_data;
	ssize_t res, buf_size;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;

	buf_size = min(count, len - 1);
	if (copy_from_user(buf, userbuf, buf_size)) {
		res = -EFAULT;
		goto out_unlock;
	}
	priv->rf_offset = simple_strtoul((char *)buf, NULL, 16);
	res = count;
out_unlock:
	free_page(addr);
	return res;
}

static ssize_t libertas_wrrf_write(struct file *file,
				    const char __user *userbuf,
				    size_t count, loff_t *ppos)
{

	wlan_private *priv = file->private_data;
	ssize_t res, buf_size;
	u32 offset, value;
	struct wlan_offset_value offval;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;

	buf_size = min(count, len - 1);
	if (copy_from_user(buf, userbuf, buf_size)) {
		res = -EFAULT;
		goto out_unlock;
	}
	res = sscanf(buf, "%x %x", &offset, &value);
	if (res != 2) {
		res = -EFAULT;
		goto out_unlock;
	}

	offval.offset = offset;
	offval.value = value;
	res = libertas_prepare_and_send_command(priv,
				CMD_RF_REG_ACCESS, 1,
				CMD_OPTION_WAITFORRSP, 0, &offval);
	mdelay(10);

	res = count;
out_unlock:
	free_page(addr);
	return res;
}

#define FOPS(fread, fwrite) { \
	.owner = THIS_MODULE, \
	.open = open_file_generic, \
	.read = (fread), \
	.write = (fwrite), \
}

struct libertas_debugfs_files {
	char *name;
	int perm;
	struct file_operations fops;
};

static struct libertas_debugfs_files debugfs_files[] = {
	{ "info", 0444, FOPS(libertas_dev_info, write_file_dummy), },
	{ "getscantable", 0444, FOPS(libertas_getscantable,
					write_file_dummy), },
	{ "sleepparams", 0644, FOPS(libertas_sleepparams_read,
				libertas_sleepparams_write), },
	{ "extscan", 0600, FOPS(NULL, libertas_extscan), },
	{ "setuserscan", 0600, FOPS(NULL, libertas_setuserscan), },
};

static struct libertas_debugfs_files debugfs_events_files[] = {
	{"low_rssi", 0644, FOPS(libertas_lowrssi_read,
				libertas_lowrssi_write), },
	{"low_snr", 0644, FOPS(libertas_lowsnr_read,
				libertas_lowsnr_write), },
	{"failure_count", 0644, FOPS(libertas_failcount_read,
				libertas_failcount_write), },
	{"beacon_missed", 0644, FOPS(libertas_bcnmiss_read,
				libertas_bcnmiss_write), },
	{"high_rssi", 0644, FOPS(libertas_highrssi_read,
				libertas_highrssi_write), },
	{"high_snr", 0644, FOPS(libertas_highsnr_read,
				libertas_highsnr_write), },
};

static struct libertas_debugfs_files debugfs_regs_files[] = {
	{"rdmac", 0644, FOPS(libertas_rdmac_read, libertas_rdmac_write), },
	{"wrmac", 0600, FOPS(NULL, libertas_wrmac_write), },
	{"rdbbp", 0644, FOPS(libertas_rdbbp_read, libertas_rdbbp_write), },
	{"wrbbp", 0600, FOPS(NULL, libertas_wrbbp_write), },
	{"rdrf", 0644, FOPS(libertas_rdrf_read, libertas_rdrf_write), },
	{"wrrf", 0600, FOPS(NULL, libertas_wrrf_write), },
};

void libertas_debugfs_init(void)
{
	if (!libertas_dir)
		libertas_dir = debugfs_create_dir("libertas_wireless", NULL);

	return;
}

void libertas_debugfs_remove(void)
{
	if (libertas_dir)
		 debugfs_remove(libertas_dir);
	return;
}

void libertas_debugfs_init_one(wlan_private *priv, struct net_device *dev)
{
	int i;
	struct libertas_debugfs_files *files;
	if (!libertas_dir)
		goto exit;

	priv->debugfs_dir = debugfs_create_dir(dev->name, libertas_dir);
	if (!priv->debugfs_dir)
		goto exit;

	for (i=0; i<ARRAY_SIZE(debugfs_files); i++) {
		files = &debugfs_files[i];
		priv->debugfs_files[i] = debugfs_create_file(files->name,
							     files->perm,
							     priv->debugfs_dir,
							     priv,
							     &files->fops);
	}

	priv->events_dir = debugfs_create_dir("subscribed_events", priv->debugfs_dir);
	if (!priv->events_dir)
		goto exit;

	for (i=0; i<ARRAY_SIZE(debugfs_events_files); i++) {
		files = &debugfs_events_files[i];
		priv->debugfs_events_files[i] = debugfs_create_file(files->name,
							     files->perm,
							     priv->events_dir,
							     priv,
							     &files->fops);
	}

	priv->regs_dir = debugfs_create_dir("registers", priv->debugfs_dir);
	if (!priv->regs_dir)
		goto exit;

	for (i=0; i<ARRAY_SIZE(debugfs_regs_files); i++) {
		files = &debugfs_regs_files[i];
		priv->debugfs_regs_files[i] = debugfs_create_file(files->name,
							     files->perm,
							     priv->regs_dir,
							     priv,
							     &files->fops);
	}

#ifdef PROC_DEBUG
	libertas_debug_init(priv, dev);
#endif
exit:
	return;
}

void libertas_debugfs_remove_one(wlan_private *priv)
{
	int i;

	for(i=0; i<ARRAY_SIZE(debugfs_regs_files); i++)
		debugfs_remove(priv->debugfs_regs_files[i]);

	debugfs_remove(priv->regs_dir);

	for(i=0; i<ARRAY_SIZE(debugfs_events_files); i++)
		debugfs_remove(priv->debugfs_events_files[i]);

	debugfs_remove(priv->events_dir);
#ifdef PROC_DEBUG
	debugfs_remove(priv->debugfs_debug);
#endif
	for(i=0; i<ARRAY_SIZE(debugfs_files); i++)
		debugfs_remove(priv->debugfs_files[i]);
	debugfs_remove(priv->debugfs_dir);
}



/* debug entry */

#ifdef PROC_DEBUG

#define item_size(n)	(FIELD_SIZEOF(wlan_adapter, n))
#define item_addr(n)	(offsetof(wlan_adapter, n))


struct debug_data {
	char name[32];
	u32 size;
	size_t addr;
};

/* To debug any member of wlan_adapter, simply add one line here.
 */
static struct debug_data items[] = {
	{"intcounter", item_size(intcounter), item_addr(intcounter)},
	{"psmode", item_size(psmode), item_addr(psmode)},
	{"psstate", item_size(psstate), item_addr(psstate)},
};

static int num_of_items = ARRAY_SIZE(items);

/**
 *  @brief proc read function
 *
 *  @param page	   pointer to buffer
 *  @param s       read data starting position
 *  @param off     offset
 *  @param cnt     counter
 *  @param eof     end of file flag
 *  @param data    data to output
 *  @return 	   number of output data
 */
static ssize_t wlan_debugfs_read(struct file *file, char __user *userbuf,
			size_t count, loff_t *ppos)
{
	int val = 0;
	size_t pos = 0;
	ssize_t res;
	char *p;
	int i;
	struct debug_data *d;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;

	p = buf;

	d = (struct debug_data *)file->private_data;

	for (i = 0; i < num_of_items; i++) {
		if (d[i].size == 1)
			val = *((u8 *) d[i].addr);
		else if (d[i].size == 2)
			val = *((u16 *) d[i].addr);
		else if (d[i].size == 4)
			val = *((u32 *) d[i].addr);
		else if (d[i].size == 8)
			val = *((u64 *) d[i].addr);

		pos += sprintf(p + pos, "%s=%d\n", d[i].name, val);
	}

	res = simple_read_from_buffer(userbuf, count, ppos, p, pos);

	free_page(addr);
	return res;
}

/**
 *  @brief proc write function
 *
 *  @param f	   file pointer
 *  @param buf     pointer to data buffer
 *  @param cnt     data number to write
 *  @param data    data to write
 *  @return 	   number of data
 */
static ssize_t wlan_debugfs_write(struct file *f, const char __user *buf,
			    size_t cnt, loff_t *ppos)
{
	int r, i;
	char *pdata;
	char *p;
	char *p0;
	char *p1;
	char *p2;
	struct debug_data *d = (struct debug_data *)f->private_data;

	pdata = kmalloc(cnt, GFP_KERNEL);
	if (pdata == NULL)
		return 0;

	if (copy_from_user(pdata, buf, cnt)) {
		lbs_deb_debugfs("Copy from user failed\n");
		kfree(pdata);
		return 0;
	}

	p0 = pdata;
	for (i = 0; i < num_of_items; i++) {
		do {
			p = strstr(p0, d[i].name);
			if (p == NULL)
				break;
			p1 = strchr(p, '\n');
			if (p1 == NULL)
				break;
			p0 = p1++;
			p2 = strchr(p, '=');
			if (!p2)
				break;
			p2++;
			r = simple_strtoul(p2, NULL, 0);
			if (d[i].size == 1)
				*((u8 *) d[i].addr) = (u8) r;
			else if (d[i].size == 2)
				*((u16 *) d[i].addr) = (u16) r;
			else if (d[i].size == 4)
				*((u32 *) d[i].addr) = (u32) r;
			else if (d[i].size == 8)
				*((u64 *) d[i].addr) = (u64) r;
			break;
		} while (1);
	}
	kfree(pdata);

	return (ssize_t)cnt;
}

static struct file_operations libertas_debug_fops = {
	.owner = THIS_MODULE,
	.open = open_file_generic,
	.write = wlan_debugfs_write,
	.read = wlan_debugfs_read,
};

/**
 *  @brief create debug proc file
 *
 *  @param priv	   pointer wlan_private
 *  @param dev     pointer net_device
 *  @return 	   N/A
 */
static void libertas_debug_init(wlan_private * priv, struct net_device *dev)
{
	int i;

	if (!priv->debugfs_dir)
		return;

	for (i = 0; i < num_of_items; i++)
		items[i].addr += (size_t) priv->adapter;

	priv->debugfs_debug = debugfs_create_file("debug", 0644,
						  priv->debugfs_dir, &items[0],
						  &libertas_debug_fops);
}
#endif