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-rw-r--r--Documentation/usb/wusb-cbaf60
-rw-r--r--drivers/usb/wusbcore/Kconfig23
-rw-r--r--drivers/usb/wusbcore/Makefile8
-rw-r--r--drivers/usb/wusbcore/cbaf.c521
4 files changed, 350 insertions, 262 deletions
diff --git a/Documentation/usb/wusb-cbaf b/Documentation/usb/wusb-cbaf
index a385478ba12e..2e78b70f3adc 100644
--- a/Documentation/usb/wusb-cbaf
+++ b/Documentation/usb/wusb-cbaf
@@ -70,32 +70,42 @@ EOF
# FIXME: CHID should come from a database :), band group from the host
host_CHID="00 11 22 33 44 55 66 77 88 99 aa bb cc dd ee ff"
host_band_group="0001"
-host_name="Linux-WUSB"
+host_name=$(hostname)
devs="$(echo /sys/bus/usb/drivers/wusb-cbaf/[0-9]*)"
-hdevs="$(find /sys -name wusb_chid -printf "%h\n")"
+hdevs="$(for h in /sys/class/uwb_rc/*/wusbhc; do readlink -f $h; done)"
result=0
case $1 in
start)
for dev in ${2:-$hdevs}
do
- uwb_rc=$(find $(dirname $(dirname $dev)) -iname uwb_rc:uwb*)
- if cat $uwb_rc/uwb_rc/beacon | grep -q "channel: -1"
+ uwb_rc=$(readlink -f $dev/uwb_rc)
+ if cat $uwb_rc/beacon | grep -q -- "-1"
then
- echo 13 0 | cat > $uwb_rc/uwb_rc/beacon
- echo I: started beaconing on ch 13 in host $(basename $uwb_rc)
+ echo 13 0 > $uwb_rc/beacon
+ echo I: started beaconing on ch 13 on $(basename $uwb_rc) >&2
fi
- echo $host_CHID | cat > $dev/wusb_chid
- echo I: started host $(basename $dev)
+ echo $host_CHID > $dev/wusb_chid
+ echo I: started host $(basename $dev) >&2
+ done
+ ;;
+ stop)
+ for dev in ${2:-$hdevs}
+ do
+ echo 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > $dev/wusb_chid
+ echo I: stopped host $(basename $dev) >&2
+ uwb_rc=$(readlink -f $dev/uwb_rc)
+ echo -1 | cat > $uwb_rc/beacon
+ echo I: stopped beaconing on $(basename $uwb_rc) >&2
done
;;
set-chid)
shift
- for dev in ${2:-$devs}
- do
- echo "${2:-$host_CHID}" "${3:-$host_band_group}" "${4:-$host_name}" \
- | cat > $dev/wusb_host_info
+ for dev in ${2:-$devs}; do
+ echo "${4:-$host_name}" > $dev/wusb_host_name
+ echo "${3:-$host_band_group}" > $dev/wusb_host_band_groups
+ echo ${2:-$host_CHID} > $dev/wusb_chid
done
;;
get-cdid)
@@ -105,21 +115,17 @@ case $1 in
done
;;
set-cc)
- for dev in ${2:-$devs}
- do
- shift
- CDID="$(head --bytes=16 /dev/urandom | od -tx1 -An)"
- CK="$(head --bytes=16 /dev/urandom | od -tx1 -An)"
- cat > $dev/wusb_cc <<EOF
-CDID:$CDID
-CK:$CK
-EOF
- cat <<EOF
-I: CC set
-CHID: $host_CHID
-CDID:$CDID
-CK: $CK
-EOF
+ for dev in ${2:-$devs}; do
+ shift
+ CDID="$(head --bytes=16 /dev/urandom | od -tx1 -An)"
+ CK="$(head --bytes=16 /dev/urandom | od -tx1 -An)"
+ echo "$CDID" > $dev/wusb_cdid
+ echo "$CK" > $dev/wusb_ck
+
+ echo I: CC set >&2
+ echo "CHID: $(cat $dev/wusb_chid)"
+ echo "CDID:$CDID"
+ echo "CK: $CK"
done
;;
help|h|--help|-h)
diff --git a/drivers/usb/wusbcore/Kconfig b/drivers/usb/wusbcore/Kconfig
index add077e5c5d0..4ea76693ad46 100644
--- a/drivers/usb/wusbcore/Kconfig
+++ b/drivers/usb/wusbcore/Kconfig
@@ -15,3 +15,26 @@ config USB_WUSB
To compile this support select Y (built in). It is safe to
select even if you don't have the hardware.
+
+config USB_WUSB_CBAF
+ tristate "Support WUSB Cable Based Association (CBA)"
+ depends on USB
+ help
+ Some WUSB devices support Cable Based Association. It's used to
+ enable the secure communication between the host and the
+ device.
+
+ Enable this option if your WUSB device must to be connected
+ via wired USB before establishing a wireless link.
+
+ It is safe to select even if you don't have a compatible
+ hardware.
+
+config USB_WUSB_CBAF_DEBUG
+ bool "Enable CBA debug messages"
+ depends on USB_WUSB_CBAF
+ help
+ Say Y here if you want the CBA to produce a bunch of debug messages
+ to the system log. Select this if you are having a problem with
+ CBA support and want to see more of what is going on.
+
diff --git a/drivers/usb/wusbcore/Makefile b/drivers/usb/wusbcore/Makefile
index 7a4d00724039..75f1ade66258 100644
--- a/drivers/usb/wusbcore/Makefile
+++ b/drivers/usb/wusbcore/Makefile
@@ -1,5 +1,7 @@
-obj-$(CONFIG_USB_WUSB) += wusbcore.o wusb-cbaf.o
+obj-$(CONFIG_USB_WUSB) += wusbcore.o
obj-$(CONFIG_USB_HWA_HCD) += wusb-wa.o
+obj-$(CONFIG_USB_WUSB_CBAF) += wusb-cbaf.o
+
wusbcore-objs := \
crypto.o \
@@ -18,3 +20,7 @@ wusb-wa-objs := wa-hc.o \
wa-nep.o \
wa-rpipe.o \
wa-xfer.o
+
+ifeq ($(CONFIG_USB_WUSB_CBAF_DEBUG),y)
+EXTRA_CFLAGS += -DDEBUG
+endif
diff --git a/drivers/usb/wusbcore/cbaf.c b/drivers/usb/wusbcore/cbaf.c
index 584eabe274b3..ab4788d1785a 100644
--- a/drivers/usb/wusbcore/cbaf.c
+++ b/drivers/usb/wusbcore/cbaf.c
@@ -4,6 +4,7 @@
*
* Copyright (C) 2006 Intel Corporation
* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * Copyright (C) 2008 Cambridge Silicon Radio Ltd.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
@@ -20,14 +21,13 @@
* 02110-1301, USA.
*
*
- * WUSB devices have to be paired (authenticated in WUSB lingo) so
+ * WUSB devices have to be paired (associated in WUSB lingo) so
* that they can connect to the system.
*
- * One way of pairing is using CBA-Cable Based Authentication, devices
- * that can connect via wired or wireless USB. First time you plug
- * them with a cable, pairing is done between host and device and
- * subsequent times, you can connect wirelessly without having to
- * pair. That's the idea.
+ * One way of pairing is using CBA-Cable Based Association. First
+ * time you plug the device with a cable, association is done between
+ * host and device and subsequent times, you can connect wirelessly
+ * without having to associate again. That's the idea.
*
* This driver does nothing Earth shattering. It just provides an
* interface to chat with the wire-connected device so we can get a
@@ -42,56 +42,49 @@
*
* The process goes like this:
*
- * 1. device plugs, cbaf is loaded, notifications happen
+ * 1. Device plugs, cbaf is loaded, notifications happen.
*
- * 2. the connection manager sees a device with CBAF capability (the
- * wusb_{host_info,cdid,cc} files are in /sys/device/blah/OURDEVICE).
+ * 2. The connection manager (CM) sees a device with CBAF capability
+ * (the wusb_chid etc. files in /sys/devices/blah/OURDEVICE).
*
- * 3. CM (connection manager) writes the CHID (host ID) and a host
- * name into the wusb_host_info file. This gets sent to the device.
+ * 3. The CM writes the host name, supported band groups, and the CHID
+ * (host ID) into the wusb_host_name, wusb_host_band_groups and
+ * wusb_chid files. These get sent to the device and the CDID (if
+ * any) for this host is requested.
*
- * 4. CM cats the wusb_cdid file; this asks the device if it has any
- * CDID associated to the CHDI we just wrote before. If it does, it
- * is printed, along with the device 'friendly name' and the band
- * groups the device supports.
+ * 4. The CM can verify that the device's supported band groups
+ * (wusb_device_band_groups) are compatible with the host.
*
- * 5. CM looks up its database
+ * 5. The CM reads the wusb_cdid file.
*
- * 5.1 If it has a matching CHID,CDID entry, the device has been
- * authorized before (paired). Now we can optionally ask the user
- * if he wants to allow the device to connect. Then we generate a
- * new CDID and CK, send it to the device and update the database
- * (writing to the wusb_cc file so they are uploaded to the device).
+ * 6. The CM looks up its database
*
- * 5.2 If the CDID is zero (or we didn't find a matching CDID in our
- * database), we assume the device is not known. We ask the user
- * if s/he wants to allow the device to be connected wirelessly
- * to the system. If nope, nothing else is done (FIXME: maybe
- * send a zero CDID to clean up our CHID?). If yes, we generate
- * random CDID and CKs (and write them to the wusb_cc file so
- * they are uploaded to the device).
+ * 6.1 If it has a matching CHID,CDID entry, the device has been
+ * authorized before (paired) and nothing further needs to be
+ * done.
*
- * 6. device is unplugged
+ * 6.2 If the CDID is zero (or the CM doesn't find a matching CDID in
+ * its database), the device is assumed to be not known. The CM
+ * may associate the host with device by: writing a randomly
+ * generated CDID to wusb_cdid and then a random CK to wusb_ck
+ * (this uploads the new CC to the device).
*
- * When the device tries to connect wirelessly, it will present it's
- * CDID to the WUSB host controller with ID CHID, which will query the
- * database. If found, the host will (with a 4way handshake) challenge
- * the device to demonstrate it has the CK secret key (from our
- * database) without actually exchanging it. Once satisfied, crypto
- * keys are derived from the CK, the device is connected and all
- * communication is crypted.
+ * CMD may choose to prompt the user before associating with a new
+ * device.
*
+ * 7. Device is unplugged.
*
- * NOTES ABOUT THE IMPLEMENTATION
+ * When the device tries to connect wirelessly, it will present its
+ * CDID to the WUSB host controller. The CM will query the
+ * database. If the CHID/CDID pair found, it will (with a 4-way
+ * handshake) challenge the device to demonstrate it has the CK secret
+ * key (from our database) without actually exchanging it. Once
+ * satisfied, crypto keys are derived from the CK, the device is
+ * connected and all communication is encrypted.
*
- * The descriptors sent back and forth use this horrible format from
- * hell on which each field is actually a field ID, field length and
- * then the field itself. How stupid can that get, taking into account
- * the structures are defined by the spec?? oh well.
- *
- *
- * FIXME: we don't provide a way to tell the device the pairing failed
- * (ie: send a CC_DATA_FAIL). Should add some day.
+ * References:
+ * [WUSB-AM] Association Models Supplement to the Certified Wireless
+ * Universal Serial Bus Specification, version 1.0.
*/
#include <linux/module.h>
#include <linux/ctype.h>
@@ -105,9 +98,7 @@
#include <linux/usb/wusb.h>
#include <linux/usb/association.h>
-#undef D_LOCAL
-#define D_LOCAL 6
-#include <linux/uwb/debug.h>
+#define CBA_NAME_LEN 0x40 /* [WUSB-AM] table 4-7 */
/* An instance of a Cable-Based-Association-Framework device */
struct cbaf {
@@ -116,24 +107,27 @@ struct cbaf {
void *buffer;
size_t buffer_size;
- struct wusb_ckhdid chid;/* Host Information */
- char host_name[65]; /* max length:
- Assoc Models Suplement 1.0[T4-7] */
+ struct wusb_ckhdid chid;
+ char host_name[CBA_NAME_LEN];
u16 host_band_groups;
- struct wusb_ckhdid cdid;/* Device Information */
- char device_name[65]; /* max length:
- Assoc Models Suplement 1.0[T4-7] */
+ struct wusb_ckhdid cdid;
+ char device_name[CBA_NAME_LEN];
u16 device_band_groups;
- struct wusb_ckhdid ck; /* Connection Key */
+
+ struct wusb_ckhdid ck;
};
/*
* Verify that a CBAF USB-interface has what we need
*
- * (like we care, we are going to fail the enumeration if not :)
+ * According to [WUSB-AM], CBA devices should provide at least two
+ * interfaces:
+ * - RETRIEVE_HOST_INFO
+ * - ASSOCIATE
*
- * FIXME: ugly function, need to split
+ * If the device doesn't provide these interfaces, we do not know how
+ * to deal with it.
*/
static int cbaf_check(struct cbaf *cbaf)
{
@@ -143,8 +137,7 @@ static int cbaf_check(struct cbaf *cbaf)
struct wusb_cbaf_assoc_request *assoc_request;
size_t assoc_size;
void *itr, *top;
- unsigned ar_index;
- int ar_rhi_idx = -1, ar_assoc_idx = -1;
+ int ar_rhi = 0, ar_assoc = 0;
result = usb_control_msg(
cbaf->usb_dev, usb_rcvctrlpipe(cbaf->usb_dev, 0),
@@ -153,93 +146,91 @@ static int cbaf_check(struct cbaf *cbaf)
0, cbaf->usb_iface->cur_altsetting->desc.bInterfaceNumber,
cbaf->buffer, cbaf->buffer_size, 1000 /* FIXME: arbitrary */);
if (result < 0) {
- dev_err(dev, "cannot get available association types: %d\n",
+ dev_err(dev, "Cannot get available association types: %d\n",
result);
- goto error_get_assoc_types;
+ return result;
}
+
assoc_info = cbaf->buffer;
if (result < sizeof(*assoc_info)) {
- dev_err(dev, "not enough data to decode association info "
+ dev_err(dev, "Not enough data to decode association info "
"header (%zu vs %zu bytes required)\n",
(size_t)result, sizeof(*assoc_info));
- goto error_bad_header;
+ return result;
}
+
assoc_size = le16_to_cpu(assoc_info->Length);
if (result < assoc_size) {
- dev_err(dev, "not enough data to decode association info "
+ dev_err(dev, "Not enough data to decode association info "
"(%zu vs %zu bytes required)\n",
(size_t)assoc_size, sizeof(*assoc_info));
- goto error_bad_data;
+ return result;
}
/*
* From now on, we just verify, but won't error out unless we
* don't find the AR_TYPE_WUSB_{RETRIEVE_HOST_INFO,ASSOCIATE}
* types.
*/
- ar_index = 0;
itr = cbaf->buffer + sizeof(*assoc_info);
top = cbaf->buffer + assoc_size;
- d_printf(1, dev, "Found %u association requests (%zu bytes)\n",
+ dev_dbg(dev, "Found %u association requests (%zu bytes)\n",
assoc_info->NumAssociationRequests, assoc_size);
+
while (itr < top) {
u16 ar_type, ar_subtype;
u32 ar_size;
const char *ar_name;
assoc_request = itr;
+
if (top - itr < sizeof(*assoc_request)) {
- dev_err(dev, "not enough data to decode associaton "
+ dev_err(dev, "Not enough data to decode associaton "
"request (%zu vs %zu bytes needed)\n",
top - itr, sizeof(*assoc_request));
break;
}
+
ar_type = le16_to_cpu(assoc_request->AssociationTypeId);
ar_subtype = le16_to_cpu(assoc_request->AssociationSubTypeId);
ar_size = le32_to_cpu(assoc_request->AssociationTypeInfoSize);
+ ar_name = "unknown";
+
switch (ar_type) {
case AR_TYPE_WUSB:
- /* Verify we have what is mandated by AMS1.0 */
+ /* Verify we have what is mandated by [WUSB-AM]. */
switch (ar_subtype) {
case AR_TYPE_WUSB_RETRIEVE_HOST_INFO:
- ar_name = "retrieve_host_info";
- ar_rhi_idx = ar_index;
+ ar_name = "RETRIEVE_HOST_INFO";
+ ar_rhi = 1;
break;
case AR_TYPE_WUSB_ASSOCIATE:
/* send assoc data */
- ar_name = "associate";
- ar_assoc_idx = ar_index;
+ ar_name = "ASSOCIATE";
+ ar_assoc = 1;
break;
- default:
- ar_name = "unknown";
};
break;
- default:
- ar_name = "unknown";
};
- d_printf(1, dev, "association request #%02u: 0x%04x/%04x "
+
+ dev_dbg(dev, "Association request #%02u: 0x%04x/%04x "
"(%zu bytes): %s\n",
assoc_request->AssociationDataIndex, ar_type,
ar_subtype, (size_t)ar_size, ar_name);
itr += sizeof(*assoc_request);
- ar_index++;
}
- if (ar_rhi_idx == -1) {
+
+ if (!ar_rhi) {
dev_err(dev, "Missing RETRIEVE_HOST_INFO association "
"request\n");
- goto error_bad_reqs;
+ return -EINVAL;
}
- if (ar_assoc_idx == -1) {
+ if (!ar_assoc) {
dev_err(dev, "Missing ASSOCIATE association request\n");
- goto error_bad_reqs;
+ return -EINVAL;
}
- return 0;
-error_bad_header:
-error_bad_data:
-error_bad_reqs:
-error_get_assoc_types:
- return -EINVAL;
+ return 0;
}
static const struct wusb_cbaf_host_info cbaf_host_info_defaults = {
@@ -256,6 +247,7 @@ static const struct wusb_cbaf_host_info cbaf_host_info_defaults = {
static int cbaf_send_host_info(struct cbaf *cbaf)
{
struct wusb_cbaf_host_info *hi;
+ size_t name_len;
size_t hi_size;
hi = cbaf->buffer;
@@ -263,11 +255,11 @@ static int cbaf_send_host_info(struct cbaf *cbaf)
*hi = cbaf_host_info_defaults;
hi->CHID = cbaf->chid;
hi->LangID = 0; /* FIXME: I guess... */
- strncpy(hi->HostFriendlyName, cbaf->host_name,
- hi->HostFriendlyName_hdr.len);
- hi->HostFriendlyName_hdr.len =
- cpu_to_le16(strlen(hi->HostFriendlyName));
- hi_size = sizeof(*hi) + strlen(hi->HostFriendlyName);
+ strlcpy(hi->HostFriendlyName, cbaf->host_name, CBA_NAME_LEN);
+ name_len = strlen(cbaf->host_name);
+ hi->HostFriendlyName_hdr.len = cpu_to_le16(name_len);
+ hi_size = sizeof(*hi) + name_len;
+
return usb_control_msg(cbaf->usb_dev, usb_sndctrlpipe(cbaf->usb_dev, 0),
CBAF_REQ_SET_ASSOCIATION_RESPONSE,
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
@@ -276,8 +268,47 @@ static int cbaf_send_host_info(struct cbaf *cbaf)
hi, hi_size, 1000 /* FIXME: arbitrary */);
}
-/* Show current CHID info we have set from user space */
-static ssize_t cbaf_wusb_host_info_show(struct device *dev,
+/*
+ * Get device's information (CDID) associated to CHID
+ *
+ * The device will return it's information (CDID, name, bandgroups)
+ * associated to the CHID we have set before, or 0 CDID and default
+ * name and bandgroup if no CHID set or unknown.
+ */
+static int cbaf_cdid_get(struct cbaf *cbaf)
+{
+ int result;
+ struct device *dev = &cbaf->usb_iface->dev;
+ struct wusb_cbaf_device_info *di;
+ size_t needed;
+
+ di = cbaf->buffer;
+ result = usb_control_msg(
+ cbaf->usb_dev, usb_rcvctrlpipe(cbaf->usb_dev, 0),
+ CBAF_REQ_GET_ASSOCIATION_REQUEST,
+ USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+ 0x0200, cbaf->usb_iface->cur_altsetting->desc.bInterfaceNumber,
+ di, cbaf->buffer_size, 1000 /* FIXME: arbitrary */);
+ if (result < 0) {
+ dev_err(dev, "Cannot request device information: %d\n", result);
+ return result;
+ }
+
+ needed = result < sizeof(*di) ? sizeof(*di) : le32_to_cpu(di->Length);
+ if (result < needed) {
+ dev_err(dev, "Not enough data in DEVICE_INFO reply (%zu vs "
+ "%zu bytes needed)\n", (size_t)result, needed);
+ return result;
+ }
+
+ strlcpy(cbaf->device_name, di->DeviceFriendlyName, CBA_NAME_LEN);
+ cbaf->cdid = di->CDID;
+ cbaf->device_band_groups = le16_to_cpu(di->BandGroups);
+
+ return 0;
+}
+
+static ssize_t cbaf_wusb_chid_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
@@ -286,17 +317,10 @@ static ssize_t cbaf_wusb_host_info_show(struct device *dev,
char pr_chid[WUSB_CKHDID_STRSIZE];
ckhdid_printf(pr_chid, sizeof(pr_chid), &cbaf->chid);
- return scnprintf(buf, PAGE_SIZE, "CHID: %s\nName: %s\n",
- pr_chid, cbaf->host_name);
+ return scnprintf(buf, PAGE_SIZE, "%s\n", pr_chid);
}
-/*
- * Get a host info CHID from user space and send it to the device.
- *
- * The user can recover a CC from the device associated to that CHID
- * by cat'ing wusb_connection_context.
- */
-static ssize_t cbaf_wusb_host_info_store(struct device *dev,
+static ssize_t cbaf_wusb_chid_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
@@ -308,8 +332,7 @@ static ssize_t cbaf_wusb_host_info_store(struct device *dev,
"%02hhx %02hhx %02hhx %02hhx "
"%02hhx %02hhx %02hhx %02hhx "
"%02hhx %02hhx %02hhx %02hhx "
- "%02hhx %02hhx %02hhx %02hhx "
- "%04hx %64s\n",
+ "%02hhx %02hhx %02hhx %02hhx",
&cbaf->chid.data[0] , &cbaf->chid.data[1],
&cbaf->chid.data[2] , &cbaf->chid.data[3],
&cbaf->chid.data[4] , &cbaf->chid.data[5],
@@ -317,24 +340,79 @@ static ssize_t cbaf_wusb_host_info_store(struct device *dev,
&cbaf->chid.data[8] , &cbaf->chid.data[9],
&cbaf->chid.data[10], &cbaf->chid.data[11],
&cbaf->chid.data[12], &cbaf->chid.data[13],
- &cbaf->chid.data[14], &cbaf->chid.data[15],
- &cbaf->host_band_groups, cbaf->host_name);
- if (result != 18) {
- dev_err(dev, "Unrecognized CHID (need 16 8-bit hex digits, "
- "a 16 bit hex band group mask "
- "and a host name, got only %d)\n", (int)result);
+ &cbaf->chid.data[14], &cbaf->chid.data[15]);
+
+ if (result != 16)
return -EINVAL;
- }
+
result = cbaf_send_host_info(cbaf);
if (result < 0)
- dev_err(dev, "Couldn't send host information to device: %d\n",
- (int)result);
- else
- d_printf(1, dev, "HI sent, wusb_cc can be read now\n");
- return result < 0 ? result : size;
+ return result;
+ result = cbaf_cdid_get(cbaf);
+ if (result < 0)
+ return -result;
+ return size;
+}
+static DEVICE_ATTR(wusb_chid, 0600, cbaf_wusb_chid_show, cbaf_wusb_chid_store);
+
+static ssize_t cbaf_wusb_host_name_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct usb_interface *iface = to_usb_interface(dev);
+ struct cbaf *cbaf = usb_get_intfdata(iface);
+
+ return scnprintf(buf, PAGE_SIZE, "%s\n", cbaf->host_name);
+}
+
+static ssize_t cbaf_wusb_host_name_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ ssize_t result;
+ struct usb_interface *iface = to_usb_interface(dev);
+ struct cbaf *cbaf = usb_get_intfdata(iface);
+
+ result = sscanf(buf, "%63s", cbaf->host_name);
+ if (result != 1)
+ return -EINVAL;
+
+ return size;
+}
+static DEVICE_ATTR(wusb_host_name, 0600, cbaf_wusb_host_name_show,
+ cbaf_wusb_host_name_store);
+
+static ssize_t cbaf_wusb_host_band_groups_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct usb_interface *iface = to_usb_interface(dev);
+ struct cbaf *cbaf = usb_get_intfdata(iface);
+
+ return scnprintf(buf, PAGE_SIZE, "0x%04x\n", cbaf->host_band_groups);
+}
+
+static ssize_t cbaf_wusb_host_band_groups_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ ssize_t result;
+ struct usb_interface *iface = to_usb_interface(dev);
+ struct cbaf *cbaf = usb_get_intfdata(iface);
+ u16 band_groups = 0;
+
+ result = sscanf(buf, "%04hx", &band_groups);
+ if (result != 1)
+ return -EINVAL;
+
+ cbaf->host_band_groups = band_groups;
+
+ return size;
}
-static DEVICE_ATTR(wusb_host_info, 0600, cbaf_wusb_host_info_show,
- cbaf_wusb_host_info_store);
+
+static DEVICE_ATTR(wusb_host_band_groups, 0600,
+ cbaf_wusb_host_band_groups_show,
+ cbaf_wusb_host_band_groups_store);
static const struct wusb_cbaf_device_info cbaf_device_info_defaults = {
.Length_hdr = WUSB_AR_Length,
@@ -344,77 +422,72 @@ static const struct wusb_cbaf_device_info cbaf_device_info_defaults = {
.DeviceFriendlyName_hdr = WUSB_AR_DeviceFriendlyName,
};
-/*
- * Get device's information (CDID) associated to CHID
- *
- * The device will return it's information (CDID, name, bandgroups)
- * associated to the CHID we have set before, or 0 CDID and default
- * name and bandgroup if no CHID set or unknown.
- */
-static int cbaf_cdid_get(struct cbaf *cbaf)
+static ssize_t cbaf_wusb_cdid_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- int result;
- struct device *dev = &cbaf->usb_iface->dev;
- struct wusb_cbaf_device_info *di;
- size_t needed, dev_name_size;
+ struct usb_interface *iface = to_usb_interface(dev);
+ struct cbaf *cbaf = usb_get_intfdata(iface);
+ char pr_cdid[WUSB_CKHDID_STRSIZE];
- di = cbaf->buffer;
- result = usb_control_msg(
- cbaf->usb_dev, usb_rcvctrlpipe(cbaf->usb_dev, 0),
- CBAF_REQ_GET_ASSOCIATION_REQUEST,
- USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
- 0x0200, cbaf->usb_iface->cur_altsetting->desc.bInterfaceNumber,
- di, cbaf->buffer_size, 1000 /* FIXME: arbitrary */);
- if (result < 0) {
- dev_err(dev, "Cannot request device information: %d\n", result);
- goto error_req_di;
- }
- needed = result < sizeof(*di) ? sizeof(*di) : le32_to_cpu(di->Length);
- if (result < needed) {
- dev_err(dev, "Not enough data in DEVICE_INFO reply (%zu vs "
- "%zu bytes needed)\n", (size_t)result, needed);
- goto error_bad_di;
- }
- cbaf->cdid = di->CDID;
- dev_name_size = le16_to_cpu(di->DeviceFriendlyName_hdr.len);
- dev_name_size = dev_name_size > 65 - 1 ? 65 - 1 : dev_name_size;
- memcpy(cbaf->device_name, di->DeviceFriendlyName, dev_name_size);
- cbaf->device_name[dev_name_size] = 0;
- cbaf->device_band_groups = le16_to_cpu(di->BandGroups);
- result = 0;
-error_req_di:
-error_bad_di:
- return result;
+ ckhdid_printf(pr_cdid, sizeof(pr_cdid), &cbaf->cdid);
+ return scnprintf(buf, PAGE_SIZE, "%s\n", pr_cdid);
}
-/*
- * Get device information and print it to sysfs
- *
- * See cbaf_cdid_get()
- */
-static ssize_t cbaf_wusb_cdid_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+static ssize_t cbaf_wusb_cdid_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
{
ssize_t result;
struct usb_interface *iface = to_usb_interface(dev);
struct cbaf *cbaf = usb_get_intfdata(iface);
- char pr_cdid[WUSB_CKHDID_STRSIZE];
+ struct wusb_ckhdid cdid;
- result = cbaf_cdid_get(cbaf);
- if (result < 0) {
- dev_err(dev, "Cannot read device information: %d\n",
- (int)result);
- goto error_get_di;
- }
- ckhdid_printf(pr_cdid, sizeof(pr_cdid), &cbaf->cdid);
- result = scnprintf(buf, PAGE_SIZE,
- "CDID: %s\nName: %s\nBand_groups: 0x%04x\n",
- pr_cdid, cbaf->device_name,
- cbaf->device_band_groups);
-error_get_di:
- return result;
+ result = sscanf(buf,
+ "%02hhx %02hhx %02hhx %02hhx "
+ "%02hhx %02hhx %02hhx %02hhx "
+ "%02hhx %02hhx %02hhx %02hhx "
+ "%02hhx %02hhx %02hhx %02hhx",
+ &cdid.data[0] , &cdid.data[1],
+ &cdid.data[2] , &cdid.data[3],
+ &cdid.data[4] , &cdid.data[5],
+ &cdid.data[6] , &cdid.data[7],
+ &cdid.data[8] , &cdid.data[9],
+ &cdid.data[10], &cdid.data[11],
+ &cdid.data[12], &cdid.data[13],
+ &cdid.data[14], &cdid.data[15]);
+ if (result != 16)
+ return -EINVAL;
+
+ cbaf->cdid = cdid;
+
+ return size;
+}
+static DEVICE_ATTR(wusb_cdid, 0600, cbaf_wusb_cdid_show, cbaf_wusb_cdid_store);
+
+static ssize_t cbaf_wusb_device_band_groups_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct usb_interface *iface = to_usb_interface(dev);
+ struct cbaf *cbaf = usb_get_intfdata(iface);
+
+ return scnprintf(buf, PAGE_SIZE, "0x%04x\n", cbaf->device_band_groups);
+}
+
+static DEVICE_ATTR(wusb_device_band_groups, 0600,
+ cbaf_wusb_device_band_groups_show,
+ NULL);
+
+static ssize_t cbaf_wusb_device_name_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct usb_interface *iface = to_usb_interface(dev);
+ struct cbaf *cbaf = usb_get_intfdata(iface);
+
+ return scnprintf(buf, PAGE_SIZE, "%s\n", cbaf->device_name);
}
-static DEVICE_ATTR(wusb_cdid, 0600, cbaf_wusb_cdid_show, NULL);
+static DEVICE_ATTR(wusb_device_name, 0600, cbaf_wusb_device_name_show, NULL);
static const struct wusb_cbaf_cc_data cbaf_cc_data_defaults = {
.AssociationTypeId_hdr = WUSB_AR_AssociationTypeId,
@@ -435,9 +508,7 @@ static const struct wusb_cbaf_cc_data_fail cbaf_cc_data_fail_defaults = {
};
/*
- * Send a new CC to the device
- *
- * So we update the CK and send the whole thing to the device
+ * Send a new CC to the device.
*/
static int cbaf_cc_upload(struct cbaf *cbaf)
{
@@ -452,30 +523,25 @@ static int cbaf_cc_upload(struct cbaf *cbaf)
ccd->CDID = cbaf->cdid;
ccd->CK = cbaf->ck;
ccd->BandGroups = cpu_to_le16(cbaf->host_band_groups);
+
+ dev_dbg(dev, "Trying to upload CC:\n");
+ ckhdid_printf(pr_cdid, sizeof(pr_cdid), &ccd->CHID);
+ dev_dbg(dev, " CHID %s\n", pr_cdid);
+ ckhdid_printf(pr_cdid, sizeof(pr_cdid), &ccd->CDID);
+ dev_dbg(dev, " CDID %s\n", pr_cdid);
+ dev_dbg(dev, " Bandgroups 0x%04x\n", cbaf->host_band_groups);
+
result = usb_control_msg(
cbaf->usb_dev, usb_sndctrlpipe(cbaf->usb_dev, 0),
CBAF_REQ_SET_ASSOCIATION_RESPONSE,
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0x0201, cbaf->usb_iface->cur_altsetting->desc.bInterfaceNumber,
ccd, sizeof(*ccd), 1000 /* FIXME: arbitrary */);
- d_printf(1, dev, "Uploaded CC:\n");
- ckhdid_printf(pr_cdid, sizeof(pr_cdid), &ccd->CHID);
- d_printf(1, dev, " CHID %s\n", pr_cdid);
- ckhdid_printf(pr_cdid, sizeof(pr_cdid), &ccd->CDID);
- d_printf(1, dev, " CDID %s\n", pr_cdid);
- ckhdid_printf(pr_cdid, sizeof(pr_cdid), &ccd->CK);
- d_printf(1, dev, " CK %s\n", pr_cdid);
- d_printf(1, dev, " bandgroups 0x%04x\n", cbaf->host_band_groups);
+
return result;
}
-/*
- * Send a new CC to the device
- *
- * We take the CDID and CK from user space, the rest from the info we
- * set with host_info.
- */
-static ssize_t cbaf_wusb_cc_store(struct device *dev,
+static ssize_t cbaf_wusb_ck_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
@@ -484,23 +550,10 @@ static ssize_t cbaf_wusb_cc_store(struct device *dev,
struct cbaf *cbaf = usb_get_intfdata(iface);
result = sscanf(buf,
- "CDID: %02hhx %02hhx %02hhx %02hhx "
- "%02hhx %02hhx %02hhx %02hhx "
"%02hhx %02hhx %02hhx %02hhx "
- "%02hhx %02hhx %02hhx %02hhx\n"
- "CK: %02hhx %02hhx %02hhx %02hhx "
"%02hhx %02hhx %02hhx %02hhx "
"%02hhx %02hhx %02hhx %02hhx "
- "%02hhx %02hhx %02hhx %02hhx\n",
- &cbaf->cdid.data[0] , &cbaf->cdid.data[1],
- &cbaf->cdid.data[2] , &cbaf->cdid.data[3],
- &cbaf->cdid.data[4] , &cbaf->cdid.data[5],
- &cbaf->cdid.data[6] , &cbaf->cdid.data[7],
- &cbaf->cdid.data[8] , &cbaf->cdid.data[9],
- &cbaf->cdid.data[10], &cbaf->cdid.data[11],
- &cbaf->cdid.data[12], &cbaf->cdid.data[13],
- &cbaf->cdid.data[14], &cbaf->cdid.data[15],
-
+ "%02hhx %02hhx %02hhx %02hhx",
&cbaf->ck.data[0] , &cbaf->ck.data[1],
&cbaf->ck.data[2] , &cbaf->ck.data[3],
&cbaf->ck.data[4] , &cbaf->ck.data[5],
@@ -509,25 +562,25 @@ static ssize_t cbaf_wusb_cc_store(struct device *dev,
&cbaf->ck.data[10], &cbaf->ck.data[11],
&cbaf->ck.data[12], &cbaf->ck.data[13],
&cbaf->ck.data[14], &cbaf->ck.data[15]);
- if (result != 32) {
- dev_err(dev, "Unrecognized CHID/CK (need 32 8-bit "
- "hex digits, got only %d)\n", (int)result);
+ if (result != 16)
return -EINVAL;
- }
+
result = cbaf_cc_upload(cbaf);
if (result < 0)
- dev_err(dev, "Couldn't upload connection context: %d\n",
- (int)result);
- else
- d_printf(1, dev, "Connection context uploaded\n");
- return result < 0 ? result : size;
+ return result;
+
+ return size;
}
-static DEVICE_ATTR(wusb_cc, 0600, NULL, cbaf_wusb_cc_store);
+static DEVICE_ATTR(wusb_ck, 0600, NULL, cbaf_wusb_ck_store);
static struct attribute *cbaf_dev_attrs[] = {
- &dev_attr_wusb_host_info.attr,
+ &dev_attr_wusb_host_name.attr,
+ &dev_attr_wusb_host_band_groups.attr,
+ &dev_attr_wusb_chid.attr,
&dev_attr_wusb_cdid.attr,
- &dev_attr_wusb_cc.attr,
+ &dev_attr_wusb_device_name.attr,
+ &dev_attr_wusb_device_band_groups.attr,
+ &dev_attr_wusb_ck.attr,
NULL,
};
@@ -539,32 +592,33 @@ static struct attribute_group cbaf_dev_attr_group = {
static int cbaf_probe(struct usb_interface *iface,
const struct usb_device_id *id)
{
- int result;
struct cbaf *cbaf;
struct device *dev = &iface->dev;
+ int result = -ENOMEM;
- result = -ENOMEM;
cbaf = kzalloc(sizeof(*cbaf), GFP_KERNEL);
- if (cbaf == NULL) {
- dev_err(dev, "Unable to allocate instance\n");
+ if (cbaf == NULL)
goto error_kzalloc;
- }
cbaf->buffer = kmalloc(512, GFP_KERNEL);
if (cbaf->buffer == NULL)
goto error_kmalloc_buffer;
+
cbaf->buffer_size = 512;
cbaf->usb_dev = usb_get_dev(interface_to_usbdev(iface));
cbaf->usb_iface = usb_get_intf(iface);
result = cbaf_check(cbaf);
- if (result < 0)
+ if (result < 0) {
+ dev_err(dev, "This device is not WUSB-CBAF compliant"
+ "and is not supported yet.\n");
goto error_check;
+ }
+
result = sysfs_create_group(&dev->kobj, &cbaf_dev_attr_group);
if (result < 0) {
dev_err(dev, "Can't register sysfs attr group: %d\n", result);
goto error_create_group;
}
usb_set_intfdata(iface, cbaf);
- d_printf(2, dev, "CBA attached\n");
return 0;
error_create_group:
@@ -587,7 +641,6 @@ static void cbaf_disconnect(struct usb_interface *iface)
/* paranoia: clean up crypto keys */
memset(cbaf, 0, sizeof(*cbaf));
kfree(cbaf);
- d_printf(1, dev, "CBA detached\n");
}
static struct usb_device_id cbaf_id_table[] = {
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