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usb: gadget: f_uac1: update Class-Specific AudioControl Interface Header Descriptor

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Update this according to USB Audio Class 1.0 spec. This fixes the Windows 7
detection issue.

Cc: Rafael Brune <mail@rbrune.de>
Signed-off-by: Xuebing Wang <xbing6@gmail.com>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
(Fixed some code style issues)
Tested-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Xuebing Wang 2014-12-10 16:28:15 +08:00 committed by Felipe Balbi
parent 625763d101
commit 8d252db174
1 changed files with 9 additions and 5 deletions
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14
drivers/usb/gadget/function/f_uac1.c
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@ -31,7 +31,7 @@ static int generic_get_cmd(struct usb_audio_control *con, u8 cmd);
*/
#define F_AUDIO_AC_INTERFACE 0
#define F_AUDIO_AS_INTERFACE 1
#define F_AUDIO_NUM_INTERFACES 2
#define F_AUDIO_NUM_INTERFACES 1
/* B.3.1 Standard AC Interface Descriptor */
static struct usb_interface_descriptor ac_interface_desc = {
@ -42,14 +42,18 @@ static struct usb_interface_descriptor ac_interface_desc = {
.bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
};
DECLARE_UAC_AC_HEADER_DESCRIPTOR(2);
/*
* The number of AudioStreaming and MIDIStreaming interfaces
* in the Audio Interface Collection
*/
DECLARE_UAC_AC_HEADER_DESCRIPTOR(1);
#define UAC_DT_AC_HEADER_LENGTH UAC_DT_AC_HEADER_SIZE(F_AUDIO_NUM_INTERFACES)
/* 1 input terminal, 1 output terminal and 1 feature unit */
#define UAC_DT_TOTAL_LENGTH (UAC_DT_AC_HEADER_LENGTH + UAC_DT_INPUT_TERMINAL_SIZE \
+ UAC_DT_OUTPUT_TERMINAL_SIZE + UAC_DT_FEATURE_UNIT_SIZE(0))
/* B.3.2 Class-Specific AC Interface Descriptor */
static struct uac1_ac_header_descriptor_2 ac_header_desc = {
static struct uac1_ac_header_descriptor_1 ac_header_desc = {
.bLength = UAC_DT_AC_HEADER_LENGTH,
.bDescriptorType = USB_DT_CS_INTERFACE,
.bDescriptorSubtype = UAC_HEADER,
@ -57,8 +61,8 @@ static struct uac1_ac_header_descriptor_2 ac_header_desc = {
.wTotalLength = __constant_cpu_to_le16(UAC_DT_TOTAL_LENGTH),
.bInCollection = F_AUDIO_NUM_INTERFACES,
.baInterfaceNr = {
[0] = F_AUDIO_AC_INTERFACE,
[1] = F_AUDIO_AS_INTERFACE,
/* Interface number of the first AudioStream interface */
[0] = 1,
}
};