1 files changed, 368 insertions, 0 deletions
diff --git a/fw/src/usbh_driver_gp_xbox.c b/fw/src/usbh_driver_gp_xbox.c
new file mode 100644
index 0000000..957cb3e
--- /dev/null
+++ b/fw/src/usbh_driver_gp_xbox.c
@@ -0,0 +1,368 @@
+/*
+ * This file is part of the libusbhost library
+ * hosted at http://github.com/libusbhost/libusbhost
+ *
+ * Copyright (C) 2015 Amir Hammad <amir.hammad@hotmail.com>
+ *
+ *
+ * libusbhost is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+#include "usart_helpers.h"
+#include "usbh_driver_gp_xbox.h"
+#include "driver/usbh_device_driver.h"
+
+#include <stdint.h>
+#include <libopencm3/usb/usbstd.h>
+
+enum STATES {
+	STATE_INACTIVE,
+	STATE_INITIAL,
+	STATE_READING_REQUEST,
+	STATE_READING_COMPLETE,
+};
+
+#define GP_XBOX_CORRECT_TRANSFERRED_LENGTH 20
+
+struct _gp_xbox_device {
+	usbh_device_t *usbh_device;
+	uint8_t buffer[USBH_GP_XBOX_BUFFER];
+	uint16_t endpoint_in_maxpacketsize;
+	uint8_t endpoint_in_address;
+	enum STATES state_next;
+	uint8_t endpoint_in_toggle;
+	uint8_t device_id;
+	uint8_t configuration_value;
+};
+typedef struct _gp_xbox_device gp_xbox_device_t;
+
+static gp_xbox_device_t gp_xbox_device[USBH_GP_XBOX_MAX_DEVICES];
+static const gp_xbox_config_t *gp_xbox_config;
+
+static bool initialized = false;
+static void read_gp_xbox_in(gp_xbox_device_t *gp_xbox);
+
+void gp_xbox_driver_init(const gp_xbox_config_t *config)
+{
+	if (!config) {
+		return;
+	}
+	initialized = true;
+	uint32_t i;
+	gp_xbox_config = config;
+	for (i = 0; i < USBH_GP_XBOX_MAX_DEVICES; i++) {
+		gp_xbox_device[i].state_next = STATE_INACTIVE;
+	}
+}
+
+/**
+ *
+ *
+ */
+static void *init(usbh_device_t *usbh_dev)
+{
+	if (!initialized) {
+		LOG_PRINTF("\n%s/%d : driver not initialized\n", __FILE__, __LINE__);
+		return 0;
+	}
+
+	uint32_t i;
+	gp_xbox_device_t *drvdata = 0;
+
+	// find free data space for gp_xbox device
+	for (i = 0; i < USBH_GP_XBOX_MAX_DEVICES; i++) {
+		if (gp_xbox_device[i].state_next == STATE_INACTIVE) {
+			drvdata = &gp_xbox_device[i];
+			drvdata->device_id = i;
+			drvdata->endpoint_in_address = 0;
+			drvdata->endpoint_in_toggle = 0;
+			drvdata->usbh_device = usbh_dev;
+			break;
+		}
+	}
+
+	return drvdata;
+}
+
+/**
+ * Returns true if all needed data are parsed
+ */
+static bool analyze_descriptor(void *drvdata, void *descriptor)
+{
+	gp_xbox_device_t *gp_xbox = (gp_xbox_device_t *)drvdata;
+	uint8_t desc_type = ((uint8_t *)descriptor)[1];
+	switch (desc_type) {
+	case USB_DT_CONFIGURATION:
+		{
+			struct usb_config_descriptor *cfg = (struct usb_config_descriptor*)descriptor;
+			gp_xbox->configuration_value = cfg->bConfigurationValue;
+		}
+		break;
+	case USB_DT_DEVICE:
+		break;
+	case USB_DT_INTERFACE:
+		break;
+	case USB_DT_ENDPOINT:
+		{
+			struct usb_endpoint_descriptor *ep = (struct usb_endpoint_descriptor*)descriptor;
+			if ((ep->bmAttributes&0x03) == USB_ENDPOINT_ATTR_INTERRUPT) {
+				uint8_t epaddr = ep->bEndpointAddress;
+				if (epaddr & (1<<7)) {
+					gp_xbox->endpoint_in_address = epaddr&0x7f;
+					if (ep->wMaxPacketSize < USBH_GP_XBOX_BUFFER) {
+						gp_xbox->endpoint_in_maxpacketsize = ep->wMaxPacketSize;
+					} else {
+						gp_xbox->endpoint_in_maxpacketsize = USBH_GP_XBOX_BUFFER;
+					}
+				}
+
+				if (gp_xbox->endpoint_in_address) {
+					gp_xbox->state_next = STATE_INITIAL;
+					return true;
+				}
+			}
+		}
+		break;
+	// TODO Class Specific descriptors
+	default:
+		break;
+	}
+	return false;
+}
+
+static void parse_data(usbh_device_t *dev)
+{
+	gp_xbox_device_t *gp_xbox = (gp_xbox_device_t *)dev->drvdata;
+
+	uint8_t *packet = gp_xbox->buffer;
+
+	gp_xbox_packet_t gp_xbox_packet;
+	gp_xbox_packet.buttons = 0;
+
+	// DPAD
+	const uint8_t data1 = packet[2];
+	const uint8_t data2 = packet[3];
+	if (data1 & (1 << 0)) {
+		gp_xbox_packet.buttons |= GP_XBOX_DPAD_TOP;
+	}
+
+	if (data1 & (1 << 1)) {
+		gp_xbox_packet.buttons |= GP_XBOX_DPAD_BOTTOM;
+	}
+
+	if (data1 & (1 << 2)) {
+		gp_xbox_packet.buttons |= GP_XBOX_DPAD_LEFT;
+	}
+
+	if (data1 & (1 << 3)) {
+		gp_xbox_packet.buttons |= GP_XBOX_DPAD_RIGHT;
+	}
+
+	// Start + select
+
+	if (data1 & (1 << 4)) {
+		gp_xbox_packet.buttons |= GP_XBOX_BUTTON_START;
+	}
+
+	if (data1 & (1 << 5)) {
+		gp_xbox_packet.buttons |= GP_XBOX_BUTTON_SELECT;
+	}
+
+	// axis buttons
+
+	if (data1 & (1 << 6)) {
+		gp_xbox_packet.buttons |= GP_XBOX_BUTTON_AXIS_LEFT;
+	}
+
+	if (data1 & (1 << 7)) {
+		gp_xbox_packet.buttons |= GP_XBOX_BUTTON_AXIS_RIGHT;
+	}
+
+	// buttons ABXY
+
+	if (data2 & (1 << 4)) {
+		gp_xbox_packet.buttons |= GP_XBOX_BUTTON_A;
+	}
+
+	if (data2 & (1 << 5)) {
+		gp_xbox_packet.buttons |= GP_XBOX_BUTTON_B;
+	}
+
+	if (data2 & (1 << 6)) {
+		gp_xbox_packet.buttons |= GP_XBOX_BUTTON_X;
+	}
+
+	if (data2 & (1 << 7)) {
+		gp_xbox_packet.buttons |= GP_XBOX_BUTTON_Y;
+	}
+
+	// buttons rear
+
+	if (data2 & (1 << 0)) {
+		gp_xbox_packet.buttons |= GP_XBOX_BUTTON_LT;
+	}
+
+	if (data2 & (1 << 1)) {
+		gp_xbox_packet.buttons |= GP_XBOX_BUTTON_RT;
+	}
+
+	if (data2 & (1 << 2)) {
+		gp_xbox_packet.buttons |= GP_XBOX_BUTTON_XBOX;
+	}
+
+	// rear levers
+
+	gp_xbox_packet.axis_rear_left = packet[4];
+	gp_xbox_packet.axis_rear_right = packet[5];
+	gp_xbox_packet.axis_left_x = packet[7]*256 + packet[6];
+	gp_xbox_packet.axis_left_y = packet[9]*256 + packet[8];
+	gp_xbox_packet.axis_right_x = packet[11]*256 + packet[10];
+	gp_xbox_packet.axis_right_y = packet[13]*256 + packet[12];
+
+	// call update callback
+	if (gp_xbox_config->update) {
+		gp_xbox_config->update(gp_xbox->device_id, gp_xbox_packet);
+	}
+}
+
+static void event(usbh_device_t *dev, usbh_packet_callback_data_t cb_data)
+{
+	gp_xbox_device_t *gp_xbox = (gp_xbox_device_t *)dev->drvdata;
+	switch (gp_xbox->state_next) {
+	case STATE_READING_COMPLETE:
+		{
+			switch (cb_data.status) {
+			case USBH_PACKET_CALLBACK_STATUS_OK:
+				parse_data(dev);
+				gp_xbox->state_next = STATE_READING_REQUEST;
+				break;
+
+			case USBH_PACKET_CALLBACK_STATUS_ERRSIZ:
+				if (cb_data.transferred_length == GP_XBOX_CORRECT_TRANSFERRED_LENGTH) {
+					parse_data(dev);
+				}
+				gp_xbox->state_next = STATE_READING_REQUEST;
+				break;
+
+			default:
+				ERROR(cb_data.status);
+				gp_xbox->state_next = STATE_INACTIVE;
+				break;
+			}
+		}
+		break;
+
+	case STATE_INACTIVE:
+		{
+			LOG_PRINTF("XBOX inactive");
+		}
+		break;
+	default:
+		{
+			LOG_PRINTF("Unknown state\n");
+		}
+		break;
+	}
+}
+
+
+static void read_gp_xbox_in(gp_xbox_device_t *gp_xbox)
+{
+	usbh_packet_t packet;
+
+	packet.address = gp_xbox->usbh_device->address;
+	packet.data.in = &gp_xbox->buffer[0];
+	packet.datalen = gp_xbox->endpoint_in_maxpacketsize;
+	packet.endpoint_address = gp_xbox->endpoint_in_address;
+	packet.endpoint_size_max = gp_xbox->endpoint_in_maxpacketsize;
+	packet.endpoint_type = USBH_ENDPOINT_TYPE_INTERRUPT;
+	packet.speed = gp_xbox->usbh_device->speed;
+	packet.callback = event;
+	packet.callback_arg = gp_xbox->usbh_device;
+	packet.toggle = &gp_xbox->endpoint_in_toggle;
+
+	gp_xbox->state_next = STATE_READING_COMPLETE;
+	usbh_read(gp_xbox->usbh_device, &packet);
+
+	// LOG_PRINTF("@gp_xbox EP1 |  \n");
+}
+
+/**
+ * \param time_curr_us - monotically rising time (see usbh_hubbed.h)
+ *		unit is microseconds
+ */
+static void poll(void *drvdata, uint32_t time_curr_us)
+{
+	(void)time_curr_us;
+
+	gp_xbox_device_t *gp_xbox = (gp_xbox_device_t *)drvdata;
+
+	switch (gp_xbox->state_next) {
+	case STATE_READING_REQUEST:
+		{
+			read_gp_xbox_in(gp_xbox);
+		}
+		break;
+
+	case STATE_INITIAL:
+		{
+			gp_xbox->state_next = STATE_READING_REQUEST;
+			gp_xbox->endpoint_in_toggle = 0;
+			LOG_PRINTF("\ngp_xbox CONFIGURED\n");
+			if (gp_xbox_config->notify_connected) {
+				gp_xbox_config->notify_connected(gp_xbox->device_id);
+			}
+		}
+		break;
+
+	default:
+		{
+			// do nothing - probably transfer is in progress
+		}
+		break;
+	}
+}
+
+static void remove(void *drvdata)
+{
+	LOG_PRINTF("Removing xbox\n");
+
+	gp_xbox_device_t *gp_xbox = (gp_xbox_device_t *)drvdata;
+	if (gp_xbox_config->notify_disconnected) {
+		gp_xbox_config->notify_disconnected(gp_xbox->device_id);
+	}
+	gp_xbox->state_next = STATE_INACTIVE;
+	gp_xbox->endpoint_in_address = 0;
+}
+
+static const usbh_dev_driver_info_t driver_info = {
+	.deviceClass = 0xff,
+	.deviceSubClass = 0xff,
+	.deviceProtocol = 0xff,
+	.idVendor = 0x045e,
+	.idProduct = 0x028e,
+	.ifaceClass = 0xff,
+	.ifaceSubClass = 93,
+	.ifaceProtocol = 0x01
+};
+
+const usbh_dev_driver_t usbh_gp_xbox_driver = {
+	.init = init,
+	.analyze_descriptor = analyze_descriptor,
+	.poll = poll,
+	.remove = remove,
+	.info = &driver_info
+};