496 lines
14 KiB
C
496 lines
14 KiB
C
/****************************************************************************
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* drivers/usbdev/dfu.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/* This is a driver for the USB Device Firmware Upgrade protocol v1.1.
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* Currently it supports the app-side ("Run-Time") part of the protocol:
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* a sequence of DFU_DETACH and USB reset commands, which will reboot into
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* a separate USB DFU bootloader.
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*
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* The bootloader is provided by board-specific logic, or STM32's
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* built-in ROM bootloader can be used.
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*
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* https://www.usb.org/sites/default/files/DFU_1.1.pdf
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*/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/usb/usb.h>
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#include <nuttx/usb/usbdev.h>
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#include <nuttx/usb/usbdev_trace.h>
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#include <nuttx/usb/dfu.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/wqueue.h>
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#include <debug.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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/****************************************************************************
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* Pre-processor definitions
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****************************************************************************/
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#define DFU_MAX_TIMEOUT 255
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#define DFU_MAX_TRANSFER 2048
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#define DFU_VERSION 0x011A
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#define USB_REQ_DFU_DETACH 0
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#define USB_REQ_DFU_GETSTATUS 3
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#ifdef CONFIG_DFU_MSFT_OS_DESCRIPTORS
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# define DFU_MAX_DESCRIPTOR_LEN 256
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#else
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# define DFU_MAX_DESCRIPTOR_LEN sizeof(struct dfu_cfgdesc_s)
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#endif
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/* Response to DFU_GETSTATUS */
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struct dfu_getstatus_response_s
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{
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uint8_t status; /* Status of latest command */
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uint8_t poll_timeout[3]; /* Time until next GETSTATUS request */
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uint8_t state; /* Current state of the device */
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uint8_t string_idx; /* Optional string description */
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};
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/* DFU functional descriptor */
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struct dfu_funcdesc_s
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{
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uint8_t len; /* Descriptor length */
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uint8_t type; /* 0x21 = DFU FUNCTIONAL */
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uint8_t attributes; /* Bit mask of supported features */
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uint8_t detach_timeout[2]; /* Maximum time in milliseconds between DFU_DETACH and USB reset */
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uint8_t transfer_size[2]; /* Maximum number of bytes in control writes */
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uint8_t dfu_version[2]; /* Version of DFU specification supported */
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};
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/* USB configuration descriptor */
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struct dfu_cfgdesc_s
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{
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struct usb_ifdesc_s ifdesc; /* DFU interface descriptor */
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struct dfu_funcdesc_s funcdesc; /* DFU functional descriptor */
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};
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struct dfu_driver_s
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{
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struct usbdevclass_driver_s drvr;
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struct usbdev_devinfo_s devinfo;
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FAR struct usbdev_req_s *ctrlreq; /* Pointer to preallocated control request */
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struct work_s work_item; /* Work queue entry for activating bootloader */
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/* usbclass callbacks */
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static int usbclass_setup(FAR struct usbdevclass_driver_s *driver,
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FAR struct usbdev_s *dev,
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FAR const struct usb_ctrlreq_s *ctrl,
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FAR uint8_t *dataout, size_t outlen);
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static int usbclass_bind(FAR struct usbdevclass_driver_s *driver,
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FAR struct usbdev_s *dev);
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static void usbclass_unbind(FAR struct usbdevclass_driver_s *driver,
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FAR struct usbdev_s *dev);
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static void usbclass_disconnect(FAR struct usbdevclass_driver_s *driver,
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FAR struct usbdev_s *dev);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* USB driver operations */
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const static struct usbdevclass_driverops_s g_dfu_driverops =
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{
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&usbclass_bind,
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&usbclass_unbind,
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&usbclass_setup,
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&usbclass_disconnect,
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NULL,
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NULL
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};
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static const struct dfu_cfgdesc_s g_dfu_cfgdesc =
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{
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{
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.len = USB_SIZEOF_IFDESC,
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.type = USB_DESC_TYPE_INTERFACE,
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.ifno = 0,
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.alt = 0,
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.neps = 0,
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.classid = 0xfe,
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.subclass = 0x01,
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.protocol = 0x01, /* DFU runtime protocol */
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.iif = 0
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},
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{
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.len = sizeof(struct dfu_funcdesc_s),
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.type = 0x21,
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.attributes = 0x0b,
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.detach_timeout =
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{
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LSBYTE(DFU_MAX_TIMEOUT),
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MSBYTE(DFU_MAX_TIMEOUT)
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},
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.transfer_size =
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{
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LSBYTE(DFU_MAX_TRANSFER),
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MSBYTE(DFU_MAX_TRANSFER)
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},
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.dfu_version =
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{
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LSBYTE(DFU_VERSION),
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MSBYTE(DFU_VERSION)
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}
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}
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static void usbclass_ep0incomplete(FAR struct usbdev_ep_s *ep,
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FAR struct usbdev_req_s *req)
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{
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}
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static int16_t usbclass_mkcfgdesc(FAR uint8_t *buf,
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FAR struct usbdev_devinfo_s *devinfo,
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uint8_t speed, uint8_t type)
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{
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FAR struct dfu_cfgdesc_s *dest = (FAR struct dfu_cfgdesc_s *)buf;
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UNUSED(speed);
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UNUSED(type);
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*dest = g_dfu_cfgdesc;
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dest->ifdesc.ifno += devinfo->ifnobase;
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dest->ifdesc.iif = devinfo->strbase;
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return sizeof(g_dfu_cfgdesc);
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}
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static int convert_to_utf16(FAR uint8_t *dest, FAR const char *src)
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{
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int bytes = 0;
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while (*src)
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{
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*dest++ = *src++;
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*dest++ = 0x00;
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bytes += 2;
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}
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return bytes;
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}
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static int usbclass_mkstrdesc(uint8_t id, FAR struct usb_strdesc_s *strdesc)
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{
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FAR const char *str;
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if (id == 0)
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{
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str = CONFIG_DFU_INTERFACE_NAME;
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}
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else
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{
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return -EINVAL;
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}
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strdesc->len = 2 + convert_to_utf16((FAR uint8_t *)(strdesc + 1), str);
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strdesc->type = USB_DESC_TYPE_STRING;
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return strdesc->len;
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}
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#ifdef CONFIG_DFU_MSFT_OS_DESCRIPTORS
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static int dfu_make_msft_extprop_desc(FAR uint8_t *buf)
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{
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FAR const char *propname = "DeviceInterfaceGUIDs";
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FAR const char *propval = CONFIG_DFU_INTERFACE_GUID;
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FAR struct usb_msft_os_extprop_hdr_s *hdr =
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(FAR struct usb_msft_os_extprop_hdr_s *)buf;
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FAR uint8_t *payload = buf + sizeof(struct usb_msft_os_extprop_hdr_s);
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int namelen;
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int valuelen;
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int proplen;
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int totallen;
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namelen = strlen(propname) * 2 + 2;
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valuelen = strlen(propval) * 2 + 4;
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proplen = 14 + namelen + valuelen;
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totallen = sizeof(struct usb_msft_os_extprop_hdr_s) + proplen;
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memset(buf, 0, totallen);
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hdr->len[0] = LSBYTE(totallen);
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hdr->len[1] = MSBYTE(totallen);
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hdr->version[1] = 0x01;
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hdr->index[0] = MSFTOSDESC_INDEX_EXTPROP;
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hdr->count[0] = 1;
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*payload++ = LSBYTE(proplen); /* dwSize */
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*payload++ = MSBYTE(proplen);
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*payload++ = 0;
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*payload++ = 0;
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*payload++ = 7; /* dwPropertyDataType = REG_MULTI_SZ */
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*payload++ = 0;
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*payload++ = 0;
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*payload++ = 0;
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*payload++ = LSBYTE(namelen); /* wPropertyNameLength */
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*payload++ = MSBYTE(namelen);
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payload += convert_to_utf16(payload, propname); /* bPropertyName */
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*payload++ = 0; /* Null terminator */
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*payload++ = 0;
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*payload++ = LSBYTE(valuelen); /* dwPropertyDataLength */
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*payload++ = MSBYTE(valuelen);
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*payload++ = 0;
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*payload++ = 0;
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payload += convert_to_utf16(payload, propval);
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*payload++ = 0; /* Null terminator for string */
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*payload++ = 0;
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*payload++ = 0; /* Null terminator for array */
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*payload++ = 0;
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return totallen;
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}
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#endif
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static void dfu_workqueue_callback(void *arg)
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{
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usbdev_dfu_activate_bootloader();
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}
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static int usbclass_setup(FAR struct usbdevclass_driver_s *driver,
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FAR struct usbdev_s *dev,
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FAR const struct usb_ctrlreq_s *ctrl,
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FAR uint8_t *dataout, size_t outlen)
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{
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FAR struct dfu_driver_s *priv = (FAR struct dfu_driver_s *)driver;
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FAR struct usbdev_req_s *ctrlreq = priv->ctrlreq;
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uint16_t value;
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uint16_t len;
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int ret = -EOPNOTSUPP;
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value = GETUINT16(ctrl->value);
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len = GETUINT16(ctrl->len);
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usbtrace(TRACE_CLASSSETUP, ctrl->req);
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uinfo("type=%02x req=%02x value=%04x len=%04x\n",
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ctrl->type, ctrl->req, value, len);
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if ((ctrl->type & USB_REQ_TYPE_MASK) == USB_REQ_TYPE_STANDARD)
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{
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if (ctrl->req == USB_REQ_GETDESCRIPTOR)
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{
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if (ctrl->value[1] == USB_DESC_TYPE_CONFIG)
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{
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ret = usbclass_mkcfgdesc(ctrlreq->buf, &priv->devinfo,
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dev->speed, ctrl->value[1]);
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}
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else if (ctrl->value[1] == USB_DESC_TYPE_STRING)
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{
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ret = usbclass_mkstrdesc(ctrl->value[0],
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(FAR struct usb_strdesc_s *)ctrlreq->buf);
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}
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}
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else if (ctrl->req == USB_REQ_SETCONFIGURATION)
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{
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return 0; /* Composite driver will send the reply */
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}
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else if (ctrl->req == USB_REQ_SETINTERFACE)
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{
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/* Only one alternate setting (0) is supported */
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if (value == 0)
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{
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ret = 0;
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}
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}
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else if (ctrl->req == USB_REQ_GETINTERFACE)
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{
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*(FAR uint8_t *) ctrlreq->buf = 0;
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ret = 1;
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}
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}
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else if ((ctrl->type & USB_REQ_TYPE_MASK) == USB_REQ_TYPE_CLASS)
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{
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if (ctrl->req == USB_REQ_DFU_DETACH)
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{
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/* Execute the bootloader activation through work queue, so that
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* we can send the USB reply packet first.
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*/
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work_queue(HPWORK, &priv->work_item,
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dfu_workqueue_callback, NULL, 1);
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ret = 0;
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}
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else if (ctrl->req == USB_REQ_DFU_GETSTATUS)
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{
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/* Respond with APP_IDLE status */
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FAR struct dfu_getstatus_response_s *response =
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(FAR struct dfu_getstatus_response_s *)ctrlreq->buf;
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memset(response, 0, sizeof(struct dfu_getstatus_response_s));
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ret = sizeof(struct dfu_getstatus_response_s);
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}
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}
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#ifdef CONFIG_DFU_MSFT_OS_DESCRIPTORS
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else if (ctrl->req == USB_REQ_GETMSFTOSDESCRIPTOR)
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{
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ret = dfu_make_msft_extprop_desc(ctrlreq->buf);
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}
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#endif
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/* Respond to the setup command if data was returned. On an error return
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* value (ret < 0), the USB driver will stall.
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*/
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if (ret >= 0)
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{
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ctrlreq->len = (len < ret) ? len : ret;
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ctrlreq->flags = USBDEV_REQFLAGS_NULLPKT;
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ret = composite_ep0submit(driver, dev, ctrlreq, ctrl);
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if (ret < 0)
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{
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usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_EPRESPQ), (uint16_t)-ret);
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ctrlreq->result = OK;
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}
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}
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return ret;
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}
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static int usbclass_bind(FAR struct usbdevclass_driver_s *driver,
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FAR struct usbdev_s *dev)
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{
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FAR struct dfu_driver_s *priv = (FAR struct dfu_driver_s *)driver;
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priv->ctrlreq = usbdev_allocreq(dev->ep0, DFU_MAX_DESCRIPTOR_LEN);
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if (priv->ctrlreq == NULL)
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{
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usbtrace(TRACE_CLSERROR(USBSER_TRACEERR_ALLOCCTRLREQ), 0);
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return -ENOMEM;
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}
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priv->ctrlreq->callback = usbclass_ep0incomplete;
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return OK;
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}
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static void usbclass_unbind(FAR struct usbdevclass_driver_s *driver,
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FAR struct usbdev_s *dev)
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{
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FAR struct dfu_driver_s *priv = (FAR struct dfu_driver_s *)driver;
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if (priv->ctrlreq != NULL)
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{
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usbdev_freereq(dev->ep0, priv->ctrlreq);
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priv->ctrlreq = NULL;
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}
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}
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static void usbclass_disconnect(FAR struct usbdevclass_driver_s *driver,
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FAR struct usbdev_s *dev)
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{
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}
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/****************************************************************************
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* Name: usbclass_classobject
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*
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* Description:
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* Allocate memory for the RNDIS driver class object
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*
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* Returned Value:
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* 0 on success, negative error code on failure.
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*
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****************************************************************************/
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static int usbclass_classobject(int minor,
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FAR struct usbdev_devinfo_s *devinfo,
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FAR struct usbdevclass_driver_s **classdev)
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{
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FAR struct dfu_driver_s *alloc;
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alloc = kmm_zalloc(sizeof(struct dfu_driver_s));
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if (alloc == NULL)
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{
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return -ENOMEM;
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}
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*classdev = &alloc->drvr;
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alloc->drvr.speed = USB_SPEED_FULL;
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alloc->drvr.ops = &g_dfu_driverops;
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return OK;
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}
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/****************************************************************************
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* Name: usbclass_uninitialize
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*
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* Description:
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* Free allocated memory
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*
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* Returned Value:
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* 0 on success, negative error code on failure.
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*
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****************************************************************************/
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static void usbclass_uninitialize(FAR struct usbdevclass_driver_s *classdev)
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{
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kmm_free(classdev);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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void usbdev_dfu_get_composite_devdesc(struct composite_devdesc_s *dev)
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{
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memset(dev, 0, sizeof(struct composite_devdesc_s));
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dev->mkconfdesc = usbclass_mkcfgdesc;
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dev->mkstrdesc = usbclass_mkstrdesc;
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dev->classobject = usbclass_classobject;
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dev->uninitialize = usbclass_uninitialize;
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dev->nconfigs = 1;
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dev->configid = 0;
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dev->cfgdescsize = sizeof(g_dfu_cfgdesc);
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dev->devinfo.ninterfaces = 1;
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dev->devinfo.nstrings = 1;
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dev->devinfo.nendpoints = 0;
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#ifdef CONFIG_DFU_MSFT_OS_DESCRIPTORS
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memcpy(dev->msft_compatible_id, "WINUSB", 6);
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#endif
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}
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