USB: implement generic usb-serial device driver

A generic board that includes this module can be plugged to a USB host
system (e.g., Linux, Windows, ...) to be seen as a generic usb-serial
adapter device (e.g., /dev/ttyUSB0 in Linux).

This module export the following functions to communicate between the
micro and the host over the usb-serial channel:

  ssize_t usb_serial_read(void *buf, ssize_t size);
  ssize_t usb_serial_write(const void *buf, ssize_t size);

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@4241 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/bertos/cfg/cfg_usb_serial.h b/bertos/cfg/cfg_usb_serial.h
new file mode 100644 (file)
index 0000000..7074094
--- /dev/null
+++ b/bertos/cfg/cfg_usb_serial.h
@@ -0,0 +1,57 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \author Andrea Righi <arighi@develer.com>
+ *
+ * \brief Configuration file for the USB serial driver module
+ */
+
+#ifndef CFG_USB_SERIAL_H
+#define CFG_USB_SERIAL_H
+
+/**
+ * Module logging level.
+ *
+ * $WIZ$ type = "enum"
+ * $WIZ$ value_list = "log_level"
+ */
+#define USB_SERIAL_LOG_LEVEL      LOG_LVL_INFO
+
+/**
+ * module logging format.
+ *
+ * $WIZ$ type = "enum"
+ * $WIZ$ value_list = "log_format"
+ */
+#define USB_SERIAL_LOG_FORMAT     LOG_FMT_TERSE
+
+#endif /* CFG_USB_H */

diff --git a/bertos/drv/usb_serial.c b/bertos/drv/usb_serial.c
new file mode 100644 (file)
index 0000000..e3054bb
--- /dev/null
+++ b/bertos/drv/usb_serial.c
@@ -0,0 +1,195 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \author Andrea Righi <arighi@develer.com>
+ *
+ * \brief Generic USB serial device driver.
+ *
+ */
+
+#include "cfg/cfg_usb_serial.h"
+
+#define LOG_LEVEL  USB_SERIAL_LOG_LEVEL
+#define LOG_FORMAT USB_SERIAL_LOG_FORMAT
+
+#include <cfg/log.h>
+#include <cfg/debug.h>
+#include <cfg/macros.h>
+
+#include <cfg/compiler.h>
+#include <cfg/module.h>
+
+#include <cpu/irq.h> /* IRQ_DISABLE / IRQ_ENABLE */
+#include <cpu/power.h> /* cpu_relax() */
+
+#include <drv/usb.h>
+
+#include <string.h> /* memcpy() */
+
+#include "drv/usb_serial.h"
+
+#define USB_SERIAL_VENDOR_ID   0x05f9
+#define USB_SERIAL_PRODUCT_ID  0xffff
+
+#define USB_SERIAL_INTERFACES  1
+#define USB_SERIAL_ENDPOINTS   3
+
+#define USB_STRING_MANUFACTURER 1
+#define USB_STRING_PRODUCT     2
+#define USB_STRING_SERIAL      3
+
+static usb_device_descriptor_t usb_serial_device_descriptor =
+{
+       .bLength = sizeof(usb_serial_device_descriptor),
+       .bDescriptorType = USB_DT_DEVICE,
+       .bcdUSB = 0x110,
+       .bDeviceClass = USB_CLASS_COMM,
+       .bDeviceSubClass = 0,
+       .bDeviceProtocol = 0,
+       .idVendor = USB_SERIAL_VENDOR_ID,
+       .idProduct = USB_SERIAL_PRODUCT_ID,
+       .bcdDevice = 0,
+       .iManufacturer = USB_STRING_MANUFACTURER,
+       .iProduct = USB_STRING_PRODUCT,
+       .iSerialNumber = USB_STRING_SERIAL,
+       .bNumConfigurations = 1,
+};
+
+static usb_config_descriptor_t usb_serial_config_descriptor =
+{
+       .bLength = sizeof(usb_serial_config_descriptor),
+       .bDescriptorType = USB_DT_CONFIG,
+       .bNumInterfaces = USB_SERIAL_INTERFACES,
+       .bConfigurationValue = 1,
+       .iConfiguration = 0,
+       .bmAttributes = USB_CONFIG_ATT_ONE,
+       .bMaxPower = 50, /* 100 mA */
+};
+
+static usb_interface_descriptor_t usb_serial_interface_descriptor =
+{
+       .bLength = sizeof(usb_serial_interface_descriptor),
+       .bDescriptorType = USB_DT_INTERFACE,
+       .bInterfaceNumber = 0,
+       .bAlternateSetting = 0,
+       .bNumEndpoints = USB_SERIAL_ENDPOINTS,
+       .bInterfaceClass = 0xff,
+       .bInterfaceSubClass = 0,
+       .bInterfaceProtocol = 0,
+       .iInterface = 0,
+};
+
+static usb_endpoint_descriptor_t usb_serial_ep_report_descriptor =
+{
+       .bLength = sizeof(usb_serial_ep_report_descriptor),
+       .bDescriptorType = USB_DT_ENDPOINT,
+       .bEndpointAddress = USB_DIR_IN | 1,
+       .bmAttributes = USB_ENDPOINT_XFER_INT,
+       .wMaxPacketSize = usb_cpu_to_le16(8),
+       .bInterval = 1,
+};
+
+static usb_endpoint_descriptor_t usb_serial_ep_in_descriptor =
+{
+       .bLength = sizeof(usb_serial_ep_in_descriptor),
+       .bDescriptorType = USB_DT_ENDPOINT,
+       .bEndpointAddress = USB_DIR_IN | 3,
+       .bmAttributes = USB_ENDPOINT_XFER_BULK,
+       .wMaxPacketSize = usb_cpu_to_le16(64),
+       .bInterval = 0,
+};
+
+static usb_endpoint_descriptor_t usb_serial_ep_out_descriptor =
+{
+       .bLength = sizeof(usb_serial_ep_in_descriptor),
+       .bDescriptorType = USB_DT_ENDPOINT,
+       .bEndpointAddress = USB_DIR_OUT | 2,
+       .bmAttributes = USB_ENDPOINT_XFER_BULK,
+       .wMaxPacketSize = usb_cpu_to_le16(64),
+       .bInterval = 0,
+};
+
+static usb_descriptor_header_t *usb_serial_config[] =
+{
+       (usb_descriptor_header_t *)&usb_serial_config_descriptor,
+       (usb_descriptor_header_t *)&usb_serial_interface_descriptor,
+       (usb_descriptor_header_t *)&usb_serial_ep_report_descriptor,
+       (usb_descriptor_header_t *)&usb_serial_ep_in_descriptor,
+       (usb_descriptor_header_t *)&usb_serial_ep_out_descriptor,
+       NULL,
+};
+
+static DEFINE_USB_STRING(language_str, "\x09\x04"); // Language ID: en_US
+static DEFINE_USB_STRING(manufacturer_str,
+                       USB_STRING("B", "e", "R", "T", "O", "S"));
+static DEFINE_USB_STRING(product_str,
+                       USB_STRING("U", "S", "B", "-", "s", "e", "r", "i", "a", "l"));
+static DEFINE_USB_STRING(serial_str,
+                       USB_STRING("0", "0", "1"));
+
+static usb_string_descriptor_t *usb_serial_strings[] =
+{
+       (usb_string_descriptor_t *)&language_str,
+       (usb_string_descriptor_t *)&manufacturer_str,
+       (usb_string_descriptor_t *)&product_str,
+       (usb_string_descriptor_t *)&serial_str,
+       NULL,
+};
+
+static struct usb_device usb_serial = {
+       .device = &usb_serial_device_descriptor,
+       .config = usb_serial_config,
+       .strings = usb_serial_strings,
+};
+
+ssize_t usb_serial_read(void *buffer, ssize_t size)
+{
+       return usb_ep_read(usb_serial_ep_out_descriptor.bEndpointAddress,
+                               buffer, size);
+}
+
+ssize_t usb_serial_write(const void *buffer, ssize_t size)
+{
+       return usb_ep_write(usb_serial_ep_in_descriptor.bEndpointAddress,
+                               buffer, size);
+}
+
+int usb_serial_init(void)
+{
+#if CONFIG_KERN
+       MOD_CHECK(proc);
+#endif
+       if (usb_device_register(&usb_serial) < 0)
+               return -1;
+       LOG_INFO("usb-serial: registered new USB interface driver\n");
+       return 0;
+}

diff --git a/bertos/drv/usb_serial.h b/bertos/drv/usb_serial.h
new file mode 100644 (file)
index 0000000..d27f7a9
--- /dev/null
+++ b/bertos/drv/usb_serial.h
@@ -0,0 +1,50 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \author Andrea Righi <arighi@develer.com>
+ *
+ * \brief Generic USB serial device driver.
+ *
+ * $WIZ$ module_name = "usb_serial"
+ * $WIZ$ module_configuration = "bertos/cfg/cfg_usb_serial.h"
+ * $WIZ$ module_depends = "usb"
+ */
+
+#ifndef USB_SERIAL_H
+#define USB_SERIAL_H
+
+ssize_t usb_serial_read(void *buf, ssize_t size);
+ssize_t usb_serial_write(const void *buf, ssize_t size);
+
+int usb_serial_init(void);
+
+#endif /* USB_SERIAL_H */