From 7f299bccb422d707be3b074f9a669b34cb207a14 Mon Sep 17 00:00:00 2001 From: Dominik Brodowski Date: Mon, 27 Jun 2005 16:28:08 -0700 Subject: [PATCH] [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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/pcmcia/socket_sysfs.c | 105 ++++++++++++++++++++++++++++++++++ 1 file changed, 105 insertions(+) diff --git a/drivers/pcmcia/socket_sysfs.c b/drivers/pcmcia/socket_sysfs.c index 8eed03938214..fd5a3b0557b3 100644 --- a/drivers/pcmcia/socket_sysfs.c +++ b/drivers/pcmcia/socket_sysfs.c @@ -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); } -- 2.20.1