socket_sysfs.c

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/*
 * socket_sysfs.c -- most of socket-related sysfs output
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * (C) 2003 - 2004      Dominik Brodowski
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/major.h>
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/timer.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <asm/irq.h>

#include <pcmcia/ss.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ds.h>
#include "cs_internal.h"

#define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)

static ssize_t pccard_show_type(struct device *dev, struct device_attribute *attr,
                char *buf)
{
    struct pcmcia_socket *s = to_socket(dev);

    if (!(s->state & SOCKET_PRESENT))
        return -ENODEV;
    if (s->state & SOCKET_CARDBUS)
        return sprintf(buf, "32-bit\n");
    return sprintf(buf, "16-bit\n");
}
static DEVICE_ATTR(card_type, 0444, pccard_show_type, NULL);

static ssize_t pccard_show_voltage(struct device *dev, struct device_attribute *attr,
                   char *buf)
{
    struct pcmcia_socket *s = to_socket(dev);

    if (!(s->state & SOCKET_PRESENT))
        return -ENODEV;
    if (s->socket.Vcc)
        return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10,
                   s->socket.Vcc % 10);
    return sprintf(buf, "X.XV\n");
}
static DEVICE_ATTR(card_voltage, 0444, pccard_show_voltage, NULL);

static ssize_t pccard_show_vpp(struct device *dev, struct device_attribute *attr,
                   char *buf)
{
    struct pcmcia_socket *s = to_socket(dev);
    if (!(s->state & SOCKET_PRESENT))
        return -ENODEV;
    return sprintf(buf, "%d.%dV\n", s->socket.Vpp / 10, s->socket.Vpp % 10);
}
static DEVICE_ATTR(card_vpp, 0444, pccard_show_vpp, NULL);

static ssize_t pccard_show_vcc(struct device *dev, struct device_attribute *attr,
                   char *buf)
{
    struct pcmcia_socket *s = to_socket(dev);
    if (!(s->state & SOCKET_PRESENT))
        return -ENODEV;
    return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10, s->socket.Vcc % 10);
}
static DEVICE_ATTR(card_vcc, 0444, pccard_show_vcc, NULL);


static ssize_t pccard_store_insert(struct device *dev, struct device_attribute *attr,
                   const char *buf, size_t count)
{
    struct pcmcia_socket *s = to_socket(dev);

    if (!count)
        return -EINVAL;

    pcmcia_parse_uevents(s, PCMCIA_UEVENT_INSERT);

    return count;
}
static DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);


static ssize_t pccard_show_card_pm_state(struct device *dev,
                     struct device_attribute *attr,
                     char *buf)
{
    struct pcmcia_socket *s = to_socket(dev);
    return sprintf(buf, "%s\n", s->state & SOCKET_SUSPEND ? "off" : "on");
}

static ssize_t pccard_store_card_pm_state(struct device *dev,
                      struct device_attribute *attr,
                      const char *buf, size_t count)
{
    struct pcmcia_socket *s = to_socket(dev);
    ssize_t ret = count;

    if (!count)
        return -EINVAL;

    if (!strncmp(buf, "off", 3))
        pcmcia_parse_uevents(s, PCMCIA_UEVENT_SUSPEND);
    else {
        if (!strncmp(buf, "on", 2))
            pcmcia_parse_uevents(s, PCMCIA_UEVENT_RESUME);
        else
            ret = -EINVAL;
    }

    return ret;
}
static DEVICE_ATTR(card_pm_state, 0644, pccard_show_card_pm_state, pccard_store_card_pm_state);

static ssize_t pccard_store_eject(struct device *dev,
                  struct device_attribute *attr,
                  const char *buf, size_t count)
{
    struct pcmcia_socket *s = to_socket(dev);

    if (!count)
        return -EINVAL;

    pcmcia_parse_uevents(s, PCMCIA_UEVENT_EJECT);

    return count;
}
static DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject);


static ssize_t pccard_show_irq_mask(struct device *dev,
                    struct device_attribute *attr,
                    char *buf)
{
    struct pcmcia_socket *s = to_socket(dev);
    return sprintf(buf, "0x%04x\n", s->irq_mask);
}

static ssize_t pccard_store_irq_mask(struct device *dev,
                     struct device_attribute *attr,
                     const char *buf, size_t count)
{
    ssize_t ret;
    struct pcmcia_socket *s = to_socket(dev);
    u32 mask;

    if (!count)
        return -EINVAL;

    ret = sscanf(buf, "0x%x\n", &mask);

    if (ret == 1) {
        mutex_lock(&s->ops_mutex);
        s->irq_mask &= mask;
        mutex_unlock(&s->ops_mutex);
        ret = 0;
    }

    return ret ? ret : count;
}
static DEVICE_ATTR(card_irq_mask, 0600, pccard_show_irq_mask, pccard_store_irq_mask);


static ssize_t pccard_show_resource(struct device *dev,
                    struct device_attribute *attr, char *buf)
{
    struct pcmcia_socket *s = to_socket(dev);
    return sprintf(buf, "%s\n", s->resource_setup_done ? "yes" : "no");
}

static ssize_t pccard_store_resource(struct device *dev,
                     struct device_attribute *attr,
                     const char *buf, size_t count)
{
    struct pcmcia_socket *s = to_socket(dev);

    if (!count)
        return -EINVAL;

    mutex_lock(&s->ops_mutex);
    if (!s->resource_setup_done)
        s->resource_setup_done = 1;
    mutex_unlock(&s->ops_mutex);

    pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);

    return count;
}
static DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);

static struct attribute *pccard_socket_attributes[] = {
    &dev_attr_card_type.attr,
    &dev_attr_card_voltage.attr,
    &dev_attr_card_vpp.attr,
    &dev_attr_card_vcc.attr,
    &dev_attr_card_insert.attr,
    &dev_attr_card_pm_state.attr,
    &dev_attr_card_eject.attr,
    &dev_attr_card_irq_mask.attr,
    &dev_attr_available_resources_setup_done.attr,
    NULL,
};

static const struct attribute_group socket_attrs = {
    .attrs = pccard_socket_attributes,
};

int pccard_sysfs_add_socket(struct device *dev)
{
    return sysfs_create_group(&dev->kobj, &socket_attrs);
}

void pccard_sysfs_remove_socket(struct device *dev)
{
    sysfs_remove_group(&dev->kobj, &socket_attrs);
}