libusbhost: Open source USB host stack for embedded devices

First public version, date: 1.4.2015

Signed-off-by: Amir Hammad <amir.hammad@hotmail.com>

include/driver/usbh_device_driver.h

@@ -0,0 +1,131 @@
+/*
+ * 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/>.
+ *
+ */
+
+#ifndef USBH_DEVICE_DRIVER_
+#define USBH_DEVICE_DRIVER_
+
+#include "usbh_config.h"
+#include "usbh_hubbed.h"
+
+#include <stdint.h>
+
+BEGIN_DECLS
+
+#define USBH_EPTYP_CONTROL				(0)
+#define USBH_EPTYP_ISOCHRONOUS 			(1)
+#define USBH_EPTYP_BULK					(2)
+#define USBH_EPTYP_INTERRUPT 			(3)
+
+#define USBH_SPEED_FULL					(0)
+#define USBH_SPEED_LOW					(1)
+#define USBH_SPEED_HIGH					(2)
+
+
+enum USBH_PACKET_CALLBACK_STATUS {
+	USBH_PACKET_CALLBACK_STATUS_OK = 0,
+	USBH_PACKET_CALLBACK_STATUS_ERRSIZ = 1,
+	USBH_PACKET_CALLBACK_STATUS_EAGAIN = 2, // -- TODO: automatic handling of transmit errors 3xTXERR->FATAL
+	USBH_PACKET_CALLBACK_STATUS_EFATAL = 3
+};
+
+enum USBH_POLL_STATUS {
+	USBH_POLL_STATUS_NONE,
+	USBH_POLL_STATUS_DEVICE_CONNECTED,
+	USBH_POLL_STATUS_DEVICE_DISCONNECTED
+};
+
+struct _usbh_device {
+	uint16_t packet_size_max0;
+	int8_t address;
+	uint8_t speed;		// (USBH_SPEED_*)
+	uint8_t state; // for enumeration purposes
+	uint8_t toggle0;
+	const usbh_dev_driver_t *drv;
+	void *drvdata;
+	const void *lld;
+};
+typedef struct _usbh_device usbh_device_t;
+
+struct _usbh_packet_callback_data {
+	enum USBH_PACKET_CALLBACK_STATUS status;
+	uint32_t transferred_length;
+};
+typedef struct _usbh_packet_callback_data usbh_packet_callback_data_t;
+
+typedef void (*usbh_packet_callback_t)(usbh_device_t *dev, usbh_packet_callback_data_t status);
+
+struct _usbh_packet {
+	void *data;		// Pointer to data
+	uint16_t datalen;	// Data length 0..1023
+	int8_t address;	// Device address
+	uint8_t endpoint_type;		// Endpoint type (see USBH_EPTYP_*)
+	uint8_t endpoint_address;		// Endpoint number 0..15
+	uint16_t endpoint_size_max;	// Max packet size for an endpoint
+	uint8_t speed;		// (USBH_SPEED_*)
+	uint8_t *toggle;
+	usbh_packet_callback_t callback;
+	void *callback_arg;
+};
+typedef struct _usbh_packet usbh_packet_t;
+
+struct _usbh_driver {
+	void (*init)(void *drvdata);
+	void (*write)(void *drvdata, const usbh_packet_t *packet);
+	void (*read)(void *drvdata, usbh_packet_t *packet);
+	enum USBH_POLL_STATUS (*poll)(void *drvdata, uint32_t t_us);
+	uint8_t (*root_speed)(void *drvdata);
+
+	// Pointer to Low-level driver data
+	void *driver_data;
+};
+typedef struct _usbh_driver usbh_driver_t;
+
+struct _usbh_generic_data {
+	usbh_device_t usbh_device[USBH_MAX_DEVICES];
+	uint8_t usbh_buffer[BUFFER_ONE_BYTES];
+};
+typedef struct _usbh_generic_data usbh_generic_data_t;
+
+
+#define ERROR(arg) LOG_PRINTF("UNHANDLED_ERROR %d: file: %s, line: %d",\
+							arg, __FILE__, __LINE__)
+
+
+/// Hub related functions
+
+usbh_device_t *usbh_get_free_device(const usbh_device_t *dev);
+bool usbh_enum_available(void);
+void device_enumeration_start(usbh_device_t *dev);
+
+/// All devices functions
+
+///
+void usbh_read(usbh_device_t *dev, usbh_packet_t *packet);
+void usbh_write(usbh_device_t *dev, const usbh_packet_t *packet);
+/// Helper functions
+void device_xfer_control_read(void *data, uint16_t datalen, usbh_packet_callback_t callback, usbh_device_t *dev);
+void device_xfer_control_write(void *data, uint16_t datalen, usbh_packet_callback_t callback, usbh_device_t *dev);
+
+
+END_DECLS
+
+#endif