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[PATCH] pcmcia: export CIS in sysfs 

Export the CIS to userspace using a sysfs binary file in
/sys/class/pcmcia_socket/pcmcia_scoket%n/

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Dominik Brodowski 2005-06-27 16:28:08 -07:00 committed by Linus Torvalds
parent ea7b38825b
commit 7f299bccb4
1 changed files with 105 additions and 0 deletions
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105
drivers/pcmcia/socket_sysfs.c
View File

@ -187,6 +187,102 @@ static ssize_t pccard_store_resource(struct class_device *dev, const char *buf,
static CLASS_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, 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 class_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 struct class_device_attribute *pccard_socket_attributes[] = {
&class_device_attr_card_type,
&class_device_attr_card_voltage,
@ -199,6 +295,12 @@ static struct class_device_attribute *pccard_socket_attributes[] = {
NULL,
};
static struct bin_attribute pccard_cis_attr = {
.attr = { .name = "cis", .mode = S_IRUGO, .owner = THIS_MODULE},
.size = 0x200,
.read = pccard_show_cis,
};
static int __devinit pccard_sysfs_add_socket(struct class_device *class_dev)
{
struct class_device_attribute **attr;
@ -209,6 +311,8 @@ static int __devinit pccard_sysfs_add_socket(struct class_device *class_dev)
if (ret)
break;
}
if (!ret)
ret = sysfs_create_bin_file(&class_dev->kobj, &pccard_cis_attr);
return ret;
}
@ -217,6 +321,7 @@ static void __devexit pccard_sysfs_remove_socket(struct class_device *class_dev)
{
struct class_device_attribute **attr;
sysfs_remove_bin_file(&class_dev->kobj, &pccard_cis_attr);
for (attr = pccard_socket_attributes; *attr; attr++)
class_device_remove_file(class_dev, *attr);
}