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Commit 7f299bcc authored by Dominik Brodowski's avatar Dominik Brodowski Committed by Linus Torvalds
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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: default avatarDominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent ea7b3882

drivers/pcmcia/socket_sysfs.c

+105 −0
Original line number Diff line number Diff line
@@ -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);

}