/*
* net/dsa/dsa.c - Hardware switch handling
* Copyright (c) 2008-2009 Marvell Semiconductor
* Copyright (c) 2013 Florian Fainelli <florian@openwrt.org>
*
* 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.
*/
#include <linux/ctype.h>
#include <linux/device.h>
#include <linux/hwmon.h>
#include <linux/list.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <net/dsa.h>
#include <linux/of.h>
#include <linux/of_mdio.h>
#include <linux/of_platform.h>
#include <linux/sysfs.h>
#include "dsa_priv.h"
char dsa_driver_version[] = "0.1";
/* switch driver registration ***********************************************/
static DEFINE_MUTEX(dsa_switch_drivers_mutex);
static LIST_HEAD(dsa_switch_drivers);
void register_switch_driver(struct dsa_switch_driver *drv)
{
mutex_lock(&dsa_switch_drivers_mutex);
list_add_tail(&drv->list, &dsa_switch_drivers);
mutex_unlock(&dsa_switch_drivers_mutex);
}
EXPORT_SYMBOL_GPL(register_switch_driver);
void unregister_switch_driver(struct dsa_switch_driver *drv)
{
mutex_lock(&dsa_switch_drivers_mutex);
list_del_init(&drv->list);
mutex_unlock(&dsa_switch_drivers_mutex);
}
EXPORT_SYMBOL_GPL(unregister_switch_driver);
static struct dsa_switch_driver *
dsa_switch_probe(struct device *host_dev, int sw_addr, char **_name)
{
struct dsa_switch_driver *ret;
struct list_head *list;
char *name;
ret = NULL;
name = NULL;
mutex_lock(&dsa_switch_drivers_mutex);
list_for_each(list, &dsa_switch_drivers) {
struct dsa_switch_driver *drv;
drv = list_entry(list, struct dsa_switch_driver, list);
name = drv->probe(host_dev, sw_addr);
if (name != NULL) {
ret = drv;
break;
}
}
mutex_unlock(&dsa_switch_drivers_mutex);
*_name = name;
return ret;
}
/* hwmon support ************************************************************/
#ifdef CONFIG_NET_DSA_HWMON
static ssize_t temp1_input_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct dsa_switch *ds = dev_get_drvdata(dev);
int temp, ret;
ret = ds->drv->get_temp(ds, &temp);
if (ret < 0)
return ret;
return sprintf(buf, "%d\n", temp * 1000);
}
static DEVICE_ATTR_RO(temp1_input);
static ssize_t temp1_max_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct dsa_switch *ds = dev_get_drvdata(dev);
int temp, ret;
ret = ds->drv->get_temp_limit(ds, &temp);
if (ret < 0)
return ret;
return sprintf(buf, "%d\n", temp * 1000);
}
static ssize_t temp1_max_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct dsa_switch *ds = dev_get_drvdata(dev);
int temp, ret;
ret = kstrtoint(buf, 0, &temp);
if (ret < 0)
return ret;
ret = ds->drv->set_temp_limit(ds, DIV_ROUND_CLOSEST(temp, 1000));
if (ret < 0)
return ret;
return count;
}
static DEVICE_ATTR(temp1_max, S_IRUGO, temp1_max_show, temp1_max_store);
static ssize_t temp1_max_alarm_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct dsa_switch *ds = dev_get_drvdata(dev);
bool alarm;
int ret;
ret = ds->drv->get_temp_alarm(ds, &alarm);
if (ret < 0)
return ret;
return sprintf(buf, "%d\n", alarm);
}
static DEVICE_ATTR_RO(temp1_max_alarm);
static struct attribute *dsa_hwmon_attrs[] = {
&dev_attr_temp1_input.attr, /* 0 */
&dev_attr_temp1_max.attr, /* 1 */
&dev_attr_temp1_max_alarm.attr, /* 2 */
NULL
};
static umode_t dsa_hwmon_attrs_visible(struct kobject *kobj,
struct attribute *attr, int index)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct dsa_switch *ds = dev_get_drvdata(dev);
struct dsa_switch_driver *drv = ds->drv;
umode_t mode = attr->mode;
if (index == 1) {
if (!drv->get_temp_limit)
mode = 0;
else if (drv->set_temp_limit)
mode |=