Without Interface Association Descriptor, the CDC serial and
RNDIS functions did not work correctly when added to a
composite gadget with other functions. This is because, it
defined two interfaces and some hosts tried to treat each
interface separatelly.
Signed-off-by: Michal Nazarewicz <m.nazarewicz@xxxxxxxxxxx>
---
drivers/usb/gadget/f_acm.c | 28 ++++++++++++++++++++++++++++
drivers/usb/gadget/f_rndis.c | 35 +++++++++++++++++++++++++++++++----
2 files changed, 59 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/gadget/f_acm.c b/drivers/usb/gadget/f_acm.c
index 7953948..572d18a 100644
--- a/drivers/usb/gadget/f_acm.c
+++ b/drivers/usb/gadget/f_acm.c
@@ -4,6 +4,8 @@
* Copyright (C) 2003 Al Borchers (alborchers@xxxxxxxxxxxxxxxx)
* Copyright (C) 2008 by David Brownell
* Copyright (C) 2008 by Nokia Corporation
+ * Copyright (C) 2009 by Samsung Electronics
+ * Author: Michal Nazarewicz (m.nazarewicz@xxxxxxxxxxx)
*
* This software is distributed under the terms of the GNU General
* Public License ("GPL") as published by the Free Software Foundation,
@@ -99,6 +101,20 @@ static inline struct f_acm *port_to_acm(struct gserial *p)
/* interface and class descriptors: */
+static struct usb_interface_assoc_descriptor
+acm_iad_descriptor = {
+ .bLength = sizeof acm_iad_descriptor,
+ .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
+
+ /* .bFirstInterface = DYNAMIC, */
+ .bInterfaceCount = 2, // control + data
+ .bFunctionClass = USB_CLASS_COMM,
+ .bFunctionSubClass = USB_CDC_SUBCLASS_ACM,
+ .bFunctionProtocol = USB_CDC_PROTO_NONE,
+ /* .iFunction = DYNAMIC */
+};
+
+
static struct usb_interface_descriptor acm_control_interface_desc __initdata = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
@@ -178,6 +194,7 @@ static struct usb_endpoint_descriptor acm_fs_out_desc __initdata = {
};
static struct usb_descriptor_header *acm_fs_function[] __initdata = {
+ (struct usb_descriptor_header *) &acm_iad_descriptor,
(struct usb_descriptor_header *) &acm_control_interface_desc,
(struct usb_descriptor_header *) &acm_header_desc,
(struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
@@ -216,6 +233,7 @@ static struct usb_endpoint_descriptor acm_hs_out_desc __initdata = {
};
static struct usb_descriptor_header *acm_hs_function[] __initdata = {
+ (struct usb_descriptor_header *) &acm_iad_descriptor,
(struct usb_descriptor_header *) &acm_control_interface_desc,
(struct usb_descriptor_header *) &acm_header_desc,
(struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
@@ -232,11 +250,13 @@ static struct usb_descriptor_header *acm_hs_function[] __initdata = {
#define ACM_CTRL_IDX 0
#define ACM_DATA_IDX 1
+#define ACM_IAD_IDX 2
/* static strings, in UTF-8 */
static struct usb_string acm_string_defs[] = {
[ACM_CTRL_IDX].s = "CDC Abstract Control Model (ACM)",
[ACM_DATA_IDX].s = "CDC ACM Data",
+ [ACM_IAD_IDX ].s = "CDC Serial",
{ /* ZEROES END LIST */ },
};
@@ -563,6 +583,7 @@ acm_bind(struct usb_configuration *c, struct usb_function *f)
if (status < 0)
goto fail;
acm->ctrl_id = status;
+ acm_iad_descriptor.bFirstInterface = status;
acm_control_interface_desc.bInterfaceNumber = status;
acm_union_desc .bMasterInterface0 = status;
@@ -732,6 +753,13 @@ int __init acm_bind_config(struct usb_configuration *c, u8 port_num)
acm_string_defs[ACM_DATA_IDX].id = status;
acm_data_interface_desc.iInterface = status;
+
+ status = usb_string_id(c->cdev);
+ if (status < 0)
+ return status;
+ acm_string_defs[ACM_IAD_IDX].id = status;
+
+ acm_iad_descriptor.iFunction = status;
}
/* allocate and initialize one new instance */
diff --git a/drivers/usb/gadget/f_rndis.c b/drivers/usb/gadget/f_rndis.c
index 3279a47..c26bb53 100644
--- a/drivers/usb/gadget/f_rndis.c
+++ b/drivers/usb/gadget/f_rndis.c
@@ -4,6 +4,8 @@
* Copyright (C) 2003-2005,2008 David Brownell
* Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
* Copyright (C) 2008 Nokia Corporation
+ * Copyright (C) 2009 Samsung Electronics
+ * Author: Michal Nazarewicz (m.nazarewicz@xxxxxxxxxxx)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -149,8 +151,8 @@ static struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor __initdata = {
.bDataInterface = 0x01,
};
-static struct usb_cdc_acm_descriptor acm_descriptor __initdata = {
- .bLength = sizeof acm_descriptor,
+static struct usb_cdc_acm_descriptor rndis_acm_descriptor __initdata = {
+ .bLength = sizeof rndis_acm_descriptor,
.bDescriptorType = USB_DT_CS_INTERFACE,
.bDescriptorSubType = USB_CDC_ACM_TYPE,
@@ -179,6 +181,20 @@ static struct usb_interface_descriptor rndis_data_intf __initdata = {
/* .iInterface = DYNAMIC */
};
+
+static struct usb_interface_assoc_descriptor
+rndis_iad_descriptor = {
+ .bLength = sizeof rndis_iad_descriptor,
+ .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
+
+ .bFirstInterface = 0, /* XXX, hardcoded */
+ .bInterfaceCount = 2, // control + data
+ .bFunctionClass = USB_CLASS_COMM,
+ .bFunctionSubClass = USB_CDC_SUBCLASS_ETHERNET,
+ .bFunctionProtocol = USB_CDC_PROTO_NONE,
+ /* .iFunction = DYNAMIC */
+};
+
/* full speed support: */
static struct usb_endpoint_descriptor fs_notify_desc __initdata = {
@@ -208,11 +224,12 @@ static struct usb_endpoint_descriptor fs_out_desc __initdata = {
};
static struct usb_descriptor_header *eth_fs_function[] __initdata = {
+ (struct usb_descriptor_header *) &rndis_iad_descriptor,
/* control interface matches ACM, not Ethernet */
(struct usb_descriptor_header *) &rndis_control_intf,
(struct usb_descriptor_header *) &header_desc,
(struct usb_descriptor_header *) &call_mgmt_descriptor,
- (struct usb_descriptor_header *) &acm_descriptor,
+ (struct usb_descriptor_header *) &rndis_acm_descriptor,
(struct usb_descriptor_header *) &rndis_union_desc,
(struct usb_descriptor_header *) &fs_notify_desc,
/* data interface has no altsetting */
@@ -252,11 +269,12 @@ static struct usb_endpoint_descriptor hs_out_desc __initdata = {
};
static struct usb_descriptor_header *eth_hs_function[] __initdata = {
+ (struct usb_descriptor_header *) &rndis_iad_descriptor,
/* control interface matches ACM, not Ethernet */
(struct usb_descriptor_header *) &rndis_control_intf,
(struct usb_descriptor_header *) &header_desc,
(struct usb_descriptor_header *) &call_mgmt_descriptor,
- (struct usb_descriptor_header *) &acm_descriptor,
+ (struct usb_descriptor_header *) &rndis_acm_descriptor,
(struct usb_descriptor_header *) &rndis_union_desc,
(struct usb_descriptor_header *) &hs_notify_desc,
/* data interface has no altsetting */
@@ -271,6 +289,7 @@ static struct usb_descriptor_header *eth_hs_function[] __initdata = {
static struct usb_string rndis_string_defs[] = {
[0].s = "RNDIS Communications Control",
[1].s = "RNDIS Ethernet Data",
+ [2].s = "RNDIS",
{ } /* end of list */
};
@@ -580,6 +599,7 @@ rndis_bind(struct usb_configuration *c, struct usb_function *f)
if (status < 0)
goto fail;
rndis->ctrl_id = status;
+ rndis_iad_descriptor.bFirstInterface = status;
rndis_control_intf.bInterfaceNumber = status;
rndis_union_desc.bMasterInterface0 = status;
@@ -791,6 +811,13 @@ int __init rndis_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN])
return status;
rndis_string_defs[1].id = status;
rndis_data_intf.iInterface = status;
+
+ /* IAD iFunction label */
+ status = usb_string_id(c->cdev);
+ if (status < 0)
+ return status;
+ rndis_string_defs[2].id = status;
+ rndis_iad_descriptor.iFunction = status;
}
/* allocate and initialize one new instance */
--
1.6.3.3
--
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