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incubator-nuttx/drivers/usbdev/dfu.c

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