arch/arm/plat-feroceon/mv_drivers_lsp/mv_neta/net_dev/mv_pon_sysfs.c

/*******************************************************************************
Copyright (C) Marvell International Ltd. and its affiliates

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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
on the worldwide web at http://www.gnu.org/licenses/gpl.txt.

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 <linux/netdevice.h>

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

#include "mv_netdev.h"

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

	off += sprintf(buf+off, "cat help                   - show this help\n");
	off += sprintf(buf+off, "echo p txp   > txp_regs    - show TX registers for <p/txp>\n");

#ifdef MV_PON_MIB_SUPPORT
	off += sprintf(buf+off, "echo mib gp  > mib_gpid    - MIB set <mib> for incoming packets with GemPID <gp>\n");
	off += sprintf(buf+off, "echo mib     > mib_def     - MIB set <mib> for incoming packets not matched any GemPID\n");
#endif /* MV_PON_MIB_SUPPORT */

	return off;
}


static ssize_t mv_pon_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	int        off = 0;
	const char *name = attr->attr.name;

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

	if (!strcmp(name, "help"))
		off = mv_pon_help(buf);
	else
		off = mv_pon_help(buf);

	return off;
}

static ssize_t mv_pon_1_store(struct device *dev,
				   struct device_attribute *attr, const char *buf, size_t len)
{
	const char      *name = attr->attr.name;
	unsigned int    v;
	unsigned long   flags;

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

	/* Read input */
	v = 0;

	sscanf(buf, "%x", &v);

	local_irq_save(flags);

#ifdef MV_PON_MIB_SUPPORT
	if (!strcmp(name, "mib_def")) {
		mvNetaPonRxMibDefault(v);
	} else
#endif /* MV_PON_MIB_SUPPORT */
		printk(KERN_ERR "%s: illegal operation <%s>\n", __func__, attr->attr.name);

	local_irq_restore(flags);

	return len;
}

static ssize_t mv_pon_2_store(struct device *dev,
				   struct device_attribute *attr, const char *buf, size_t len)
{
	const char	*name = attr->attr.name;
	unsigned int    p, v;
	unsigned long   flags;

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

	/* Read input */
	v = 0;
	sscanf(buf, "%d %x", &p, &v);

	local_irq_save(flags);

	if (!strcmp(name, "txp_regs"))
		mvNetaPonTxpRegs(p, v);
#ifdef MV_PON_MIB_SUPPORT
	else if (!strcmp(name, "mib_gpid"))
		mvNetaPonRxMibGemPid(p, v);
#endif /* MV_PON_MIB_SUPPORT */
	else
		printk(KERN_ERR "%s: illegal operation <%s>\n", __func__, attr->attr.name);

	local_irq_restore(flags);

	return len;
}

static DEVICE_ATTR(txp_regs,   S_IWUSR, mv_pon_show, mv_pon_2_store);
static DEVICE_ATTR(mib_gpid,   S_IWUSR, mv_pon_show, mv_pon_2_store);
static DEVICE_ATTR(mib_def,    S_IWUSR, mv_pon_show, mv_pon_1_store);
static DEVICE_ATTR(help,       S_IRUSR, mv_pon_show, NULL);

static struct attribute *mv_pon_attrs[] = {
	&dev_attr_txp_regs.attr,
	&dev_attr_mib_def.attr,
	&dev_attr_mib_gpid.attr,
	&dev_attr_help.attr,
	NULL
};

static struct attribute_group mv_pon_group = {
	.name = "pon",
	.attrs = mv_pon_attrs,
};

int __devinit mv_pon_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, &mv_pon_group);
		if (err) {
			printk(KERN_INFO "sysfs group failed %d\n", err);
			goto out;
		}
out:
		return err;
}

module_init(mv_pon_sysfs_init);

MODULE_AUTHOR("Dmitri Epshtein");
MODULE_DESCRIPTION("sysfs for Marvell PON");
MODULE_LICENSE("GPL");