[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>
diff --git a/drivers/pcmcia/socket_sysfs.c b/drivers/pcmcia/socket_sysfs.c
index 8eed039..fd5a3b0 100644
--- a/drivers/pcmcia/socket_sysfs.c
+++ b/drivers/pcmcia/socket_sysfs.c
@@ -187,6 +187,102 @@
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 @@
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 @@
if (ret)
break;
}
+ if (!ret)
+ ret = sysfs_create_bin_file(&class_dev->kobj, &pccard_cis_attr);
return ret;
}
@@ -217,6 +321,7 @@
{
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);
}