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linux/drivers/pcmcia/socket_sysfs.c
Zhang Rui 91a6902958 sysfs: add parameter "struct bin_attribute *" in .read/.write methods for sysfs binary attributes 
Well, first of all, I don't want to change so many files either.

What I do:
Adding a new parameter "struct bin_attribute *" in the
.read/.write methods for the sysfs binary attributes.

In fact, only the four lines change in fs/sysfs/bin.c and
include/linux/sysfs.h do the real work.
But I have to update all the files that use binary attributes
to make them compatible with the new .read and .write methods.
I'm not sure if I missed any. :(

Why I do this:
For a sysfs attribute, we can get a pointer pointing to the
struct attribute in the .show/.store method,
while we can't do this for the binary attributes.
I don't know why this is different, but this does make it not
so handy to use the binary attributes as the regular ones.
So I think this patch is reasonable. :)

Who benefits from it:
The patch that exposes ACPI tables in sysfs
requires such an improvement.
All the table binary attributes share the same .read method.
Parameter "struct bin_attribute *" is used to get
the table signature and instance number which are used to
distinguish different ACPI table binary attributes.

Without this parameter, we need to offer different .read methods
for different ACPI table binary attributes.
This is impossible as there are various ACPI tables on different
platforms, and we don't know what they are until they are loaded.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-11 16:09:09 -07:00

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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/slab.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/system.h>
#include <asm/irq.h>
#define IN_CARD_SERVICES
#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
#include <pcmcia/cs.h>
#include <pcmcia/bulkmem.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)
{
ssize_t ret;
struct pcmcia_socket *s = to_socket(dev);
if (!count)
return -EINVAL;
ret = pcmcia_insert_card(s);
return ret ? ret : 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)
{
ssize_t ret = -EINVAL;
struct pcmcia_socket *s = to_socket(dev);
if (!count)
return -EINVAL;
if (!(s->state & SOCKET_SUSPEND) && !strncmp(buf, "off", 3))
ret = pcmcia_suspend_card(s);
else if ((s->state & SOCKET_SUSPEND) && !strncmp(buf, "on", 2))
ret = pcmcia_resume_card(s);
return ret ? -ENODEV : count;
}
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)
{
ssize_t ret;
struct pcmcia_socket *s = to_socket(dev);
if (!count)
return -EINVAL;
ret = pcmcia_eject_card(s);
return ret ? ret : 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) {
s->irq_mask &= mask;
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)
{
unsigned long flags;
struct pcmcia_socket *s = to_socket(dev);
if (!count)
return -EINVAL;
spin_lock_irqsave(&s->lock, flags);
if (!s->resource_setup_done)
s->resource_setup_done = 1;
spin_unlock_irqrestore(&s->lock, flags);
mutex_lock(&s->skt_mutex);
if ((s->callback) &&
(s->state & SOCKET_PRESENT) &&
!(s->state & SOCKET_CARDBUS)) {
if (try_module_get(s->callback->owner)) {
s->callback->requery(s, 0);
module_put(s->callback->owner);
}
}
mutex_unlock(&s->skt_mutex);
return count;
}
static DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
static ssize_t pccard_extract_cis(struct pcmcia_socket *s, char *buf, loff_t off, size_t count)
{
tuple_t tuple;
int status, i;
loff_t pointer = 0;
ssize_t ret = 0;
u_char *tuplebuffer;
u_char *tempbuffer;
tuplebuffer = kmalloc(sizeof(u_char) * 256, GFP_KERNEL);
if (!tuplebuffer)
return -ENOMEM;
tempbuffer = kmalloc(sizeof(u_char) * 258, GFP_KERNEL);
if (!tempbuffer) {
ret = -ENOMEM;
goto free_tuple;
}
memset(&tuple, 0, sizeof(tuple_t));
tuple.Attributes = TUPLE_RETURN_LINK | TUPLE_RETURN_COMMON;
tuple.DesiredTuple = RETURN_FIRST_TUPLE;
tuple.TupleOffset = 0;
status = pccard_get_first_tuple(s, BIND_FN_ALL, &tuple);
while (!status) {
tuple.TupleData = tuplebuffer;
tuple.TupleDataMax = 255;
memset(tuplebuffer, 0, sizeof(u_char) * 255);
status = pccard_get_tuple_data(s, &tuple);
if (status)
break;
if (off < (pointer + 2 + tuple.TupleDataLen)) {
tempbuffer[0] = tuple.TupleCode & 0xff;
tempbuffer[1] = tuple.TupleLink & 0xff;
for (i = 0; i < tuple.TupleDataLen; i++)
tempbuffer[i + 2] = tuplebuffer[i] & 0xff;
for (i = 0; i < (2 + tuple.TupleDataLen); i++) {
if (((i + pointer) >= off) &&
(i + pointer) < (off + count)) {
buf[ret] = tempbuffer[i];
ret++;
}
}
}
pointer += 2 + tuple.TupleDataLen;
if (pointer >= (off + count))
break;
if (tuple.TupleCode == CISTPL_END)
break;
status = pccard_get_next_tuple(s, BIND_FN_ALL, &tuple);
}
kfree(tempbuffer);
free_tuple:
kfree(tuplebuffer);
return (ret);
}
static ssize_t pccard_show_cis(struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
unsigned int size = 0x200;
if (off >= size)
count = 0;
else {
struct pcmcia_socket *s;
cisinfo_t cisinfo;
if (off + count > size)
count = size - off;
s = to_socket(container_of(kobj, struct device, kobj));
if (!(s->state & SOCKET_PRESENT))
return -ENODEV;
if (pccard_validate_cis(s, BIND_FN_ALL, &cisinfo))
return -EIO;
if (!cisinfo.Chains)
return -ENODATA;
count = pccard_extract_cis(s, buf, off, count);
}
return (count);
}
static ssize_t pccard_store_cis(struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct pcmcia_socket *s = to_socket(container_of(kobj, struct device, kobj));
cisdump_t *cis;
int error;
if (off)
return -EINVAL;
if (count >= 0x200)
return -EINVAL;
if (!(s->state & SOCKET_PRESENT))
return -ENODEV;
cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL);
if (!cis)
return -ENOMEM;
cis->Length = count + 1;
memcpy(cis->Data, buf, count);
error = pcmcia_replace_cis(s, cis);
kfree(cis);
if (error)
return -EIO;
mutex_lock(&s->skt_mutex);
if ((s->callback) && (s->state & SOCKET_PRESENT) &&
!(s->state & SOCKET_CARDBUS)) {
if (try_module_get(s->callback->owner)) {
s->callback->requery(s, 1);
module_put(s->callback->owner);
}
}
mutex_unlock(&s->skt_mutex);
return count;
}
static struct device_attribute *pccard_socket_attributes[] = {
&dev_attr_card_type,
&dev_attr_card_voltage,
&dev_attr_card_vpp,
&dev_attr_card_vcc,
&dev_attr_card_insert,
&dev_attr_card_pm_state,
&dev_attr_card_eject,
&dev_attr_card_irq_mask,
&dev_attr_available_resources_setup_done,
NULL,
};
static struct bin_attribute pccard_cis_attr = {
.attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR },
.size = 0x200,
.read = pccard_show_cis,
.write = pccard_store_cis,
};
static int __devinit pccard_sysfs_add_socket(struct device *dev,
struct class_interface *class_intf)
{
struct device_attribute **attr;
int ret = 0;
for (attr = pccard_socket_attributes; *attr; attr++) {
ret = device_create_file(dev, *attr);
if (ret)
break;
}
if (!ret)
ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
return ret;
}
static void __devexit pccard_sysfs_remove_socket(struct device *dev,
struct class_interface *class_intf)
{
struct device_attribute **attr;
sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
for (attr = pccard_socket_attributes; *attr; attr++)
device_remove_file(dev, *attr);
}
struct class_interface pccard_sysfs_interface = {
.class = &pcmcia_socket_class,
.add_dev = &pccard_sysfs_add_socket,
.remove_dev = __devexit_p(&pccard_sysfs_remove_socket),
};
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