usb: f_uac1: adds support for SS and SSP

Patch adds support of SS and SSP speed.
Tested with rockchip rk3399 dwc3
Signed-off-by: Perr Zhang <perr@usb7.net>
Link: https://lore.kernel.org/r/20231213112106.605260-1-strongbox8@zoho.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/gadget/function/f_uac1.c

@@ -292,6 +292,77 @@ static struct usb_descriptor_header *f_audio_desc[] = {
 	NULL,
 };
 
+/* Standard ISO OUT Endpoint Descriptor */
+static struct usb_endpoint_descriptor ss_as_out_ep_desc  = {
+	.bLength =		USB_DT_ENDPOINT_AUDIO_SIZE,
+	.bDescriptorType =	USB_DT_ENDPOINT,
+	.bEndpointAddress =	USB_DIR_OUT,
+	.bmAttributes =		USB_ENDPOINT_SYNC_ADAPTIVE
+				| USB_ENDPOINT_XFER_ISOC,
+	.wMaxPacketSize	=	cpu_to_le16(UAC1_OUT_EP_MAX_PACKET_SIZE),
+	.bInterval =		4,
+};
+
+static struct usb_ss_ep_comp_descriptor ss_as_out_ep_desc_comp = {
+	.bLength		= sizeof(ss_as_out_ep_desc_comp),
+	.bDescriptorType	= USB_DT_SS_ENDPOINT_COMP,
+	.bMaxBurst		= 0,
+	.bmAttributes		= 0,
+	/* wBytesPerInterval = DYNAMIC */
+};
+
+/* Standard ISO OUT Endpoint Descriptor */
+static struct usb_endpoint_descriptor ss_as_in_ep_desc  = {
+	.bLength =		USB_DT_ENDPOINT_AUDIO_SIZE,
+	.bDescriptorType =	USB_DT_ENDPOINT,
+	.bEndpointAddress =	USB_DIR_IN,
+	.bmAttributes =		USB_ENDPOINT_SYNC_ASYNC
+				| USB_ENDPOINT_XFER_ISOC,
+	.wMaxPacketSize	=	cpu_to_le16(UAC1_OUT_EP_MAX_PACKET_SIZE),
+	.bInterval =		4,
+};
+
+static struct usb_ss_ep_comp_descriptor ss_as_in_ep_desc_comp = {
+	.bLength		= sizeof(ss_as_in_ep_desc_comp),
+	.bDescriptorType	= USB_DT_SS_ENDPOINT_COMP,
+	.bMaxBurst		= 0,
+	.bmAttributes		= 0,
+	/* wBytesPerInterval = DYNAMIC */
+};
+
+static struct usb_descriptor_header *f_audio_ss_desc[] = {
+	(struct usb_descriptor_header *)&ac_interface_desc,
+	(struct usb_descriptor_header *)&ac_header_desc,
+
+	(struct usb_descriptor_header *)&usb_out_it_desc,
+	(struct usb_descriptor_header *)&io_out_ot_desc,
+	(struct usb_descriptor_header *)&io_in_it_desc,
+	(struct usb_descriptor_header *)&usb_in_ot_desc,
+
+	(struct usb_descriptor_header *)&as_out_interface_alt_0_desc,
+	(struct usb_descriptor_header *)&as_out_interface_alt_1_desc,
+	(struct usb_descriptor_header *)&as_out_header_desc,
+
+	(struct usb_descriptor_header *)&as_out_type_i_desc,
+
+	//(struct usb_descriptor_header *)&as_out_ep_desc,
+	(struct usb_descriptor_header *)&ss_as_out_ep_desc,
+	(struct usb_descriptor_header *)&ss_as_out_ep_desc_comp,
+	(struct usb_descriptor_header *)&as_iso_out_desc,
+
+	(struct usb_descriptor_header *)&as_in_interface_alt_0_desc,
+	(struct usb_descriptor_header *)&as_in_interface_alt_1_desc,
+	(struct usb_descriptor_header *)&as_in_header_desc,
+
+	(struct usb_descriptor_header *)&as_in_type_i_desc,
+
+	//(struct usb_descriptor_header *)&as_in_ep_desc,
+	(struct usb_descriptor_header *)&ss_as_in_ep_desc,
+	(struct usb_descriptor_header *)&ss_as_in_ep_desc_comp,
+	(struct usb_descriptor_header *)&as_iso_in_desc,
+	NULL,
+};
+
 enum {
 	STR_AC_IF,
 	STR_USB_OUT_IT,
@@ -1352,6 +1423,7 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 		ep = usb_ep_autoconfig(cdev->gadget, &as_out_ep_desc);
 		if (!ep)
 			goto err_free_fu;
+		ss_as_out_ep_desc.bEndpointAddress = as_out_ep_desc.bEndpointAddress;
 		audio->out_ep = ep;
 		audio->out_ep->desc = &as_out_ep_desc;
 	}
@@ -1360,6 +1432,7 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 		ep = usb_ep_autoconfig(cdev->gadget, &as_in_ep_desc);
 		if (!ep)
 			goto err_free_fu;
+		ss_as_in_ep_desc.bEndpointAddress = as_in_ep_desc.bEndpointAddress;
 		audio->in_ep = ep;
 		audio->in_ep->desc = &as_in_ep_desc;
 	}
@@ -1367,8 +1440,8 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
 	setup_descriptor(audio_opts);
 
 	/* copy descriptors, and track endpoint copies */
-	status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc, NULL,
-					NULL);
+	status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc, f_audio_ss_desc,
+					f_audio_ss_desc);
 	if (status)
 		goto err_free_fu;