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From: Michal Nazarewicz <m.nazarewicz@samsung.com> 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@samsung.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- 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 4e36578..d10353d 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@steinerpoint.com) * Copyright (C) 2008 by David Brownell * Copyright (C) 2008 by Nokia Corporation + * Copyright (C) 2009 by Samsung Electronics + * Author: Michal Nazarewicz (m.nazarewicz@samsung.com) * * 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 c9966cc..95dae4c 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@samsung.com) * * 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 */ }; @@ -587,6 +606,7 @@ 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; @@ -798,6 +818,13 @@ 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 */ -- 1.6.5.5 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
