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greybus: ap: process the UniPro link up message

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The link up message is the event that tells the AP what device ID
has been assigned to a particular interface on a module during
enumeration. The link up is sent *only* after the hotplug event
for a particular module has been sent to the AP.

The link up payload must carry the Module ID and Interface ID
to uniquely identify the struct gb_interface to which the
Device ID has been assigned.

After processing of the link up message, the interface's device_id
field will contain the assigned Device ID so that the AP has the
information necessary to issue network route commands.

Signed-off-by: Matt Porter <mporter@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
This commit is contained in:
Matt Porter
2014-10-21 22:43:31 -04:00
committed by Greg Kroah-Hartman
parent 1a4c013a44
commit 6232b073d4
2 changed files with 21 additions and 0 deletions
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19
drivers/staging/greybus/ap.c
View File

@@ -106,6 +106,9 @@ static void svc_handshake(struct svc_function_handshake *handshake,
static void svc_management(struct svc_function_unipro_management *management,
int payload_length, struct greybus_host_device *hd)
{
struct gb_module *module;
struct gb_interface *interface;
if (payload_length != sizeof(struct svc_function_unipro_management)) {
dev_err(hd->parent,
"Illegal size of svc management message %d\n",
@@ -114,6 +117,22 @@ static void svc_management(struct svc_function_unipro_management *management,
}
switch (management->management_packet_type) {
case SVC_MANAGEMENT_LINK_UP:
module = gb_module_find(hd, management->link_up.module_id);
if (!module) {
dev_err(hd->parent, "Module ID %d not found\n",
management->link_up.module_id);
return;
}
interface = gb_interface_find(module,
management->link_up.interface_id);
if (!interface) {
dev_err(hd->parent, "Interface ID %d not found\n",
management->link_up.interface_id);
return;
}
interface->device_id = management->link_up.device_id;
break;
case SVC_MANAGEMENT_AP_DEVICE_ID:
hd->device_id = management->ap_device_id.device_id;
break;

2
drivers/staging/greybus/svc_msg.h
View File

@@ -55,6 +55,8 @@ struct svc_function_unipro_set_route {
};
struct svc_function_unipro_link_up {
__u8 module_id;
__u8 interface_id;
__u8 device_id;
};