arch/arm/plat-feroceon/mv_drivers_lsp/mv_neta/pnc/wol_sysfs.c

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********************************************************************************
Marvell GPL License Option

If you received this File from Marvell, you may opt to use, redistribute and/or
modify this File in accordance with the terms and conditions of the General
Public License Version 2, June 1991 (the "GPL License"), a copy of which is
available along with the File in the license.txt file or by writing to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 or
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THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY
DISCLAIMED.  The GPL License provides additional details about this warranty
disclaimer.
*******************************************************************************/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/capability.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>

#include "mvOs.h"
#include "mvCommon.h"
#include "ctrlEnv/mvCtrlEnvLib.h"

#include "gbe/mvNeta.h"
#include "pnc/mvPnc.h"

#include "net_dev/mv_netdev.h"

static char	wol_data[MV_PNC_TOTAL_DATA_SIZE];
static int  wol_data_size = 0;
static char	wol_mask[MV_PNC_TOTAL_DATA_SIZE];
static int  wol_mask_size = 0;

extern void mv_eth_wol_wakeup(int port);
extern int mv_eth_wol_sleep(int port);

static ssize_t wol_help(char *buf)
{
	int off = 0;

	off += sprintf(buf+off, "cat                  dump_all      - dump all wol rules\n");
	off += sprintf(buf+off, "echo idx           > dump          - dump rule <idx>\n");
	off += sprintf(buf+off, "echo port          > sleep         - enter WoL mode on <port>\n");
	off += sprintf(buf+off, "echo port          > wakeup        - exit WoL mode on <port>\n");
	off += sprintf(buf+off, "echo str           > data          - set data string\n");
	off += sprintf(buf+off, "echo str           > mask          - set mask string\n");
	off += sprintf(buf+off, "echo port          > add           - add new rule with <data> and <mask> on <port>\n");
	off += sprintf(buf+off, "echo idx           > del           - delete existing WoL rule <idx>\n");
	off += sprintf(buf+off, "echo port          > del_all       - delete all WoL rules added to <port>\n");

	return off;
}

static ssize_t wol_show(struct device *dev,
				  struct device_attribute *attr, char *buf)
{
	const char   *name = attr->attr.name;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	if (!strcmp(name, "dump_all"))
		mv_pnc_wol_dump();
	else if (!strcmp(name, "help"))
		return wol_help(buf);

	return 0;
}

static ssize_t wol_store(struct device *dev,
				   struct device_attribute *attr, const char *buf, size_t len)
{
	const char    *name = attr->attr.name;
	unsigned int  p, size, err = 0;
	unsigned long flags;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	sscanf(buf, "%d", &p);

	local_irq_save(flags);

	if (!strcmp(name, "sleep"))
		mv_eth_wol_sleep(p);
	else if (!strcmp(name, "wakeup"))
		mv_eth_wol_wakeup(p);
	else if (!strcmp(name, "dump")) {
		if (mv_pnc_wol_rule_dump(p))
			printk(KERN_INFO "WoL rule #%d doesn't exist\n", p);
	} else if (!strcmp(name, "data")) {
		memset(wol_data, 0, sizeof(wol_data));
		size = strlen(buf) / 2;
		if (size > sizeof(wol_data))
			size = sizeof(wol_data);
		mvHexToBin(buf, wol_data, size);
		wol_data_size = size;
	} else if (!strcmp(name, "mask")) {
		memset(wol_mask, 0, sizeof(wol_mask));
		size = strlen(buf) / 2;
		if (size > sizeof(wol_mask))
			size = sizeof(wol_mask);
		mvHexToBin(buf, wol_mask, size);
		wol_mask_size = size;
	} else if (!strcmp(name, "add")) {
		int idx;
		idx = mv_pnc_wol_rule_set(p, wol_data, wol_mask, MV_MIN(wol_data_size, wol_mask_size));
		if (idx < 0)
			err = 1;
	} else if (!strcmp(name, "del")) {
		err = mv_pnc_wol_rule_del(p);
	} else if (!strcmp(name, "del_all")) {
		err = mv_pnc_wol_rule_del_all(p);
	} else {
		err = 1;
		printk(KERN_ERR "%s: illegal operation <%s>\n", __func__, attr->attr.name);
	}
	local_irq_restore(flags);

	if (err)
		printk(KERN_ERR "%s: <%s>, error %d\n", __func__, attr->attr.name, err);

	return err ? -EINVAL : len;
}

static DEVICE_ATTR(help,        S_IRUSR, wol_show, wol_store);
static DEVICE_ATTR(dump_all,    S_IRUSR, wol_show, wol_store);
static DEVICE_ATTR(dump,        S_IWUSR, wol_show, wol_store);
static DEVICE_ATTR(data,        S_IWUSR, wol_show, wol_store);
static DEVICE_ATTR(mask,        S_IWUSR, wol_show, wol_store);
static DEVICE_ATTR(add,         S_IWUSR, wol_show, wol_store);
static DEVICE_ATTR(del,         S_IWUSR, wol_show, wol_store);
static DEVICE_ATTR(del_all,     S_IWUSR, wol_show, wol_store);
static DEVICE_ATTR(sleep,       S_IWUSR, wol_show, wol_store);
static DEVICE_ATTR(wakeup,      S_IWUSR, wol_show, wol_store);

static struct attribute *wol_attrs[] = {
    &dev_attr_help.attr,
    &dev_attr_dump_all.attr,
    &dev_attr_dump.attr,
    &dev_attr_data.attr,
    &dev_attr_mask.attr,
    &dev_attr_add.attr,
    &dev_attr_del.attr,
    &dev_attr_del_all.attr,
    &dev_attr_sleep.attr,
    &dev_attr_wakeup.attr,
    NULL
};

static struct attribute_group wol_group = {
	.name = "wol",
	.attrs = wol_attrs,
};

int __devinit wol_sysfs_init(void)
{
	int err;
	struct device *pd;

	pd = bus_find_device_by_name(&platform_bus_type, NULL, "neta");
	if (!pd) {
		platform_device_register_simple("neta", -1, NULL, 0);
		pd = bus_find_device_by_name(&platform_bus_type, NULL, "neta");
	}

	if (!pd) {
		printk(KERN_ERR "%s: cannot find neta device\n", __func__);
		pd = &platform_bus;
	}

	err = sysfs_create_group(&pd->kobj, &wol_group);
	if (err) {
		printk(KERN_INFO "sysfs group failed %d\n", err);
		goto out;
	}
out:
	return err;
}

module_init(wol_sysfs_init);

MODULE_AUTHOR("Dmitri Epshtein");
MODULE_DESCRIPTION("WoL for Marvell NetA");
MODULE_LICENSE("GPL");