From 8ed7d596716686883b5baaba60d7f764791c904e Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Thu, 1 Dec 2011 22:54:21 +0100
Subject: initial checkin of non-complete 'fast usb audio source' test program

the idea is to explore how various OSs USB-Audio drivers react if you
present them with an audio device of 512kHz or 1MHz sampling freq.
---
 usb-fast-audio-source/fast_source.c | 140 ++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 usb-fast-audio-source/fast_source.c

(limited to 'usb-fast-audio-source/fast_source.c')

diff --git a/usb-fast-audio-source/fast_source.c b/usb-fast-audio-source/fast_source.c
new file mode 100644
index 0000000..7d20c7e
--- /dev/null
+++ b/usb-fast-audio-source/fast_source.c
@@ -0,0 +1,140 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <board.h>
+#include <utility/trace.h>
+#include <utility/led.h>
+
+#include <usb/common/core/USBGenericRequest.h>
+#include <usb/device/core/USBD.h>
+#include <usb/device/core/USBDDriver.h>
+#include <usb/device/core/USBDDriverDescriptors.h>
+#include <usb/device/core/USBDCallbacks.h>
+#include <usb/common/audio/AUDGenericRequest.h>
+#include <usb/common/audio/AUDFeatureUnitRequest.h>
+
+#include <AUDDFastSourceDescriptors.h>
+#include <fast_source.h>
+
+extern const USBDDriverDescriptors auddFastSourceDriverDescriptors;
+static unsigned char driver_interfaces[3];
+static USBDDriver fast_source_driver;
+
+/* callback */
+void USBDCallbacks_RequestReceived(const USBGenericRequest *request)
+{
+	fastsource_req_hdlr(request);
+}
+
+void USBDDriverCallbacks_InterfaceSettingChanged(unsigned char interface,
+						 unsigned char setting)
+{
+	if ((interface == AUDDLoopRecDriverDescriptors_STREAMING)
+	    && (setting == 0))
+		LED_Clear(USBD_LEDOTHER);
+	else
+		LED_Set(USBD_LEDOTHER);
+}
+
+static void fastsource_get_feat_cur_val(uint8_t entity, uint8_t channel,
+				   uint8_t control, uint8_t length)
+{
+	/* FIXME */
+	USBD_Stall(0);
+}
+
+static void fastsource_set_feat_cur_val(uint8_t entity, uint8_t channel,
+				   uint8_t control, uint8_t length)
+{
+	/* FIXME */
+	USBD_Stall(0);
+}
+
+void fastsource_req_hdlr(const USBGenericRequest *request)
+{
+	unsigned char entity;
+	unsigned char interface;
+
+	switch (USBGenericRequest_GetType(request)) {
+	case USBGenericRequest_STANDARD:
+		USBDDriver_RequestHandler(&fast_source_driver, request);
+		return;
+	case USBGenericRequest_CLASS:
+		/* continue below */
+		break;
+	default:
+		TRACE_WARNING("Unsupported request type %u\n\r",
+				USBGenericRequest_GetType(request));
+		USBD_Stall(0);
+		return;
+	}
+
+	switch (USBGenericRequest_GetRequest(request)) {
+	case AUDGenericRequest_SETCUR:
+		entity = AUDGenericRequest_GetEntity(request);
+		interface = AUDGenericRequest_GetInterface(request);
+		if (((entity == AUDDLoopRecDriverDescriptors_FEATUREUNIT) ||
+		     (entity == AUDDLoopRecDriverDescriptors_FEATUREUNIT_REC)) &&
+		    (interface == AUDDLoopRecDriverDescriptors_CONTROL)) {
+			fastsource_set_feat_cur_val(entity,
+				AUDFeatureUnitRequest_GetChannel(request),
+				AUDFeatureUnitRequest_GetControl(request),
+				USBGenericRequest_GetLength(request));
+		} else {
+			TRACE_WARNING("Unsupported entity/interface combination 0x%04x\n\r",
+					USBGenericRequest_GetIndex(request));
+			USBD_Stall(0);
+		}
+		break;
+	case AUDGenericRequest_GETCUR:
+		entity = AUDGenericRequest_GetEntity(request);
+		interface = AUDGenericRequest_GetInterface(request);
+		if (((entity == AUDDLoopRecDriverDescriptors_FEATUREUNIT) ||
+		     (entity == AUDDLoopRecDriverDescriptors_FEATUREUNIT_REC)) &&
+		    (interface == AUDDLoopRecDriverDescriptors_CONTROL)) {
+			fastsource_get_feat_cur_val(entity,
+				AUDFeatureUnitRequest_GetChannel(request),
+				AUDFeatureUnitRequest_GetControl(request),
+				USBGenericRequest_GetLength(request));
+		} else {
+			TRACE_WARNING("Unsupported entity/interface combination 0x%04x\n\r",
+					USBGenericRequest_GetIndex(request));
+			USBD_Stall(0);
+		}
+		break;
+	default:
+		TRACE_WARNING("Unsupported request %u\n\r",
+				USBGenericRequest_GetIndex(request));
+		USBD_Stall(0);
+		break;
+	}
+}
+
+void fastsource_init(void)
+{
+	USBDDriver_Initialize(&fast_source_driver, &auddFastSourceDriverDescriptors,
+				driver_interfaces);
+
+	USBD_Init();
+}
+
+const uint8_t test_data[2048];
+
+static void wr_compl_cb(void *arg, unsigned char status, unsigned int transferred,
+			unsigned int remain)
+{
+	uint8_t epnr = (uint8_t) arg;
+
+	if (status == 0 && remain == 0) {
+		fastsource_start(epnr);
+	} else {
+		printf("Err: EP%u wr_compl, status 0x%02u, xfr %u, remain %u\r\n",
+			epnr, status, transferred, remain);
+	}
+}
+
+void fastsource_start(uint8_t epnr)
+{
+	USBD_Write(epnr, &test_data, sizeof(test_data), wr_compl_cb, (void *) epnr);
+}
+
+
-- 
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