@@ -35,4 +35,6 @@ Description:
req_number the number of pre-allocated requests
for both capture and playback
function_name name of the interface
+ c_terminal_type code of the capture terminal type
+ p_terminal_type code of the playback terminal type
===================== =======================================
@@ -754,6 +754,8 @@ The uac2 function provides these attributes in its function directory:
req_number the number of pre-allocated request for both capture
and playback
function_name name of the interface
+ c_terminal_type code of the capture terminal type
+ p_terminal_type code of the playback terminal type
================ ====================================================
The attributes have sane default values.
@@ -212,7 +212,7 @@ static struct uac2_input_terminal_descriptor io_in_it_desc = {
.bDescriptorSubtype = UAC_INPUT_TERMINAL,
/* .bTerminalID = DYNAMIC */
- .wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_MICROPHONE),
+ /* .wTerminalType = DYNAMIC */
.bAssocTerminal = 0,
/* .bCSourceID = DYNAMIC */
.iChannelNames = 0,
@@ -240,7 +240,7 @@ static struct uac2_output_terminal_descriptor io_out_ot_desc = {
.bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
/* .bTerminalID = DYNAMIC */
- .wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_SPEAKER),
+ /* .wTerminalType = DYNAMIC */
.bAssocTerminal = 0,
/* .bSourceID = DYNAMIC */
/* .bCSourceID = DYNAMIC */
@@ -977,6 +977,9 @@ static void setup_descriptor(struct f_uac2_opts *opts)
iad_desc.bInterfaceCount++;
}
+ io_in_it_desc.wTerminalType = cpu_to_le16(opts->c_terminal_type);
+ io_out_ot_desc.wTerminalType = cpu_to_le16(opts->p_terminal_type);
+
setup_headers(opts, fs_audio_desc, USB_SPEED_FULL);
setup_headers(opts, hs_audio_desc, USB_SPEED_HIGH);
setup_headers(opts, ss_audio_desc, USB_SPEED_SUPER);
@@ -2095,6 +2098,9 @@ UAC2_ATTRIBUTE(s16, c_volume_res);
UAC2_ATTRIBUTE(u32, fb_max);
UAC2_ATTRIBUTE_STRING(function_name);
+UAC2_ATTRIBUTE(s16, p_terminal_type);
+UAC2_ATTRIBUTE(s16, c_terminal_type);
+
static struct configfs_attribute *f_uac2_attrs[] = {
&f_uac2_opts_attr_p_chmask,
&f_uac2_opts_attr_p_srate,
@@ -2122,6 +2128,9 @@ static struct configfs_attribute *f_uac2_attrs[] = {
&f_uac2_opts_attr_function_name,
+ &f_uac2_opts_attr_p_terminal_type,
+ &f_uac2_opts_attr_c_terminal_type,
+
NULL,
};
@@ -2180,6 +2189,9 @@ static struct usb_function_instance *afunc_alloc_inst(void)
snprintf(opts->function_name, sizeof(opts->function_name), "Source/Sink");
+ opts->p_terminal_type = UAC2_DEF_P_TERM_TYPE;
+ opts->c_terminal_type = UAC2_DEF_C_TERM_TYPE;
+
return &opts->func_inst;
}
@@ -35,6 +35,11 @@
#define UAC2_DEF_REQ_NUM 2
#define UAC2_DEF_INT_REQ_NUM 10
+#define UAC2_DEF_P_TERM_TYPE 0x301
+ /* UAC_OUTPUT_TERMINAL_SPEAKER */
+#define UAC2_DEF_C_TERM_TYPE 0x201
+ /* UAC_INPUT_TERMINAL_MICROPHONE*/
+
struct f_uac2_opts {
struct usb_function_instance func_inst;
int p_chmask;
@@ -65,6 +70,9 @@ struct f_uac2_opts {
char function_name[32];
+ s16 p_terminal_type;
+ s16 c_terminal_type;
+
struct mutex lock;
int refcnt;
};
Add "c_terminal_type" and "p_terminal_type" configfs entries in order to allow the user to change the capture and playback terminal type codes. These fields affect the type of audio device that Windows detects, so being able to modify this is useful when it would be advantageous for a gadget to be detected as something other than a generic speaker/microphone. The fields default to microphone for the capture type field and speaker for the playback type field as was the case before. Signed-off-by: James Gruber <jimmyjgruber@gmail.com> --- .../ABI/testing/configfs-usb-gadget-uac2 | 2 ++ Documentation/usb/gadget-testing.rst | 2 ++ drivers/usb/gadget/function/f_uac2.c | 16 ++++++++++++++-- drivers/usb/gadget/function/u_uac2.h | 8 ++++++++ 4 files changed, 26 insertions(+), 2 deletions(-)