u-boot/drivers/usb/gadget/f_dfu.c

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/*
* f_dfu.c -- Device Firmware Update USB function
*
* Copyright (C) 2012 Samsung Electronics
* authors: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
* Lukasz Majewski <l.majewski@samsung.com>
*
* Based on OpenMoko u-boot: drivers/usb/usbdfu.c
* (C) 2007 by OpenMoko, Inc.
* Author: Harald Welte <laforge@openmoko.org>
*
* based on existing SAM7DFU code from OpenPCD:
* (C) Copyright 2006 by Harald Welte <hwelte at hmw-consulting.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <errno.h>
#include <common.h>
#include <malloc.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/composite.h>
#include <dfu.h>
#include <g_dnl.h>
#include "f_dfu.h"
struct f_dfu {
struct usb_function usb_function;
struct usb_descriptor_header **function;
struct usb_string *strings;
/* when configured, we have one config */
u8 config;
u8 altsetting;
enum dfu_state dfu_state;
unsigned int dfu_status;
/* Send/received block number is handy for data integrity check */
int blk_seq_num;
unsigned int poll_timeout;
};
dfu: usb: f_dfu: Set deferred call for dfu_flush() function This patch fixes situation when one would like to write large file into medium with the file system (fat, ext4, etc). This change sets file size limitation to the DFU internal buffer size. Since u-boot is not supporting interrupts and seek on file systems, it becomes challenging to store large file appropriately. To reproduce this error - create large file (around 26 MiB) and sent it to the target board. Lets examine the flow of USB transactions: 0. DFU uses EP0 with 64B MPS [Max Packet Size] 1. Send file - OUT (PC->target) - dat_26MiB.img is sent with 4096 B transactions 2. Get status - OUT (PC->target) - wait for DFU_STATE_dfuDNLOAD_IDLE (0x05) sent from target board - IN transaction (target->PC) 3. The whole file content is sent to target - OUT (PC->target) with ZLP [Zero Length Packet] Now the interesting part starts: 4. OUT (PC->target) Setup transaction (request to share DFU state) 5. IN (target->PC) - reply the current DFU state - In the UDC driver the req->completion (with dfu_flush) is called after successful IN transfer. - The dfu_flush() (called from req->completion callback) saves the whole file at once (u-boot doesn't support seek on fs). Such operation takes considerable time. When the file is large - e.g. 26MiB - this time may be more than 5 seconds. 6. OUT (PC->target) - ZLP, is send in the same time when dfu_flush() writes data to eMMC memory. The dfu-util application has hard coded timeout on USB transaction completion set to 5 seconds (it uses libusb calls). When the file to store is large (e.g. 26 MiB) the time needed to write it may excess the dfu-util timeout and following error message will be displayed: "unable to read DFU status" on the HOST PC console. This change is supposed to leverage DFU's part responsible for storing files on file systems. Other DFU operations - i.e. raw/partition write to NAND and eMMC should work as before. The only functional change is the error reporting. When dfu_flush() fails the u-boot prompt will exit with error information and dfu-util application exits afterwards as well. Test HW: - Odroid XU3 (Exynos5433) - test with large file - Trats (Exynos4210) - test for regression - eMMC, raw, Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Reported-by: Alex Gdalevich <agdalevich@axion-biosystems.com> Tested-by: Stephen Warren <swarren@nvidia.com> Tested-by: Heiko Schocher <hs@denx.de>
2016-01-28 15:14:49 +00:00
struct dfu_entity *dfu_defer_flush;
typedef int (*dfu_state_fn) (struct f_dfu *,
const struct usb_ctrlrequest *,
struct usb_gadget *,
struct usb_request *);
static inline struct f_dfu *func_to_dfu(struct usb_function *f)
{
return container_of(f, struct f_dfu, usb_function);
}
static const struct dfu_function_descriptor dfu_func = {
.bLength = sizeof dfu_func,
.bDescriptorType = DFU_DT_FUNC,
.bmAttributes = DFU_BIT_WILL_DETACH |
DFU_BIT_MANIFESTATION_TOLERANT |
DFU_BIT_CAN_UPLOAD |
DFU_BIT_CAN_DNLOAD,
.wDetachTimeOut = 0,
.wTransferSize = DFU_USB_BUFSIZ,
.bcdDFUVersion = __constant_cpu_to_le16(0x0110),
};
static struct usb_interface_descriptor dfu_intf_runtime = {
.bLength = sizeof dfu_intf_runtime,
.bDescriptorType = USB_DT_INTERFACE,
.bNumEndpoints = 0,
.bInterfaceClass = USB_CLASS_APP_SPEC,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 1,
/* .iInterface = DYNAMIC */
};
static struct usb_descriptor_header *dfu_runtime_descs[] = {
(struct usb_descriptor_header *) &dfu_intf_runtime,
NULL,
};
static const char dfu_name[] = "Device Firmware Upgrade";
/*
* static strings, in UTF-8
*
* dfu_generic configuration
*/
static struct usb_string strings_dfu_generic[] = {
[0].s = dfu_name,
{ } /* end of list */
};
static struct usb_gadget_strings stringtab_dfu_generic = {
.language = 0x0409, /* en-us */
.strings = strings_dfu_generic,
};
static struct usb_gadget_strings *dfu_generic_strings[] = {
&stringtab_dfu_generic,
NULL,
};
/*
* usb_function specific
*/
static struct usb_gadget_strings stringtab_dfu = {
.language = 0x0409, /* en-us */
/*
* .strings
*
* assigned during initialization,
* depends on number of flash entities
*
*/
};
static struct usb_gadget_strings *dfu_strings[] = {
&stringtab_dfu,
NULL,
};
static void dfu_set_poll_timeout(struct dfu_status *dstat, unsigned int ms)
{
/*
* The bwPollTimeout DFU_GETSTATUS request payload provides information
* about minimum time, in milliseconds, that the host should wait before
* sending a subsequent DFU_GETSTATUS request
*
* This permits the device to vary the delay depending on its need to
* erase or program the memory
*
*/
unsigned char *p = (unsigned char *)&ms;
if (!ms || (ms & ~DFU_POLL_TIMEOUT_MASK)) {
dstat->bwPollTimeout[0] = 0;
dstat->bwPollTimeout[1] = 0;
dstat->bwPollTimeout[2] = 0;
return;
}
dstat->bwPollTimeout[0] = *p++;
dstat->bwPollTimeout[1] = *p++;
dstat->bwPollTimeout[2] = *p;
}
/*-------------------------------------------------------------------------*/
static void dnload_request_complete(struct usb_ep *ep, struct usb_request *req)
{
struct f_dfu *f_dfu = req->context;
int ret;
ret = dfu_write(dfu_get_entity(f_dfu->altsetting), req->buf,
req->actual, f_dfu->blk_seq_num);
if (ret) {
f_dfu->dfu_status = DFU_STATUS_errUNKNOWN;
f_dfu->dfu_state = DFU_STATE_dfuERROR;
}
}
static void dnload_request_flush(struct usb_ep *ep, struct usb_request *req)
{
struct f_dfu *f_dfu = req->context;
dfu: usb: f_dfu: Set deferred call for dfu_flush() function This patch fixes situation when one would like to write large file into medium with the file system (fat, ext4, etc). This change sets file size limitation to the DFU internal buffer size. Since u-boot is not supporting interrupts and seek on file systems, it becomes challenging to store large file appropriately. To reproduce this error - create large file (around 26 MiB) and sent it to the target board. Lets examine the flow of USB transactions: 0. DFU uses EP0 with 64B MPS [Max Packet Size] 1. Send file - OUT (PC->target) - dat_26MiB.img is sent with 4096 B transactions 2. Get status - OUT (PC->target) - wait for DFU_STATE_dfuDNLOAD_IDLE (0x05) sent from target board - IN transaction (target->PC) 3. The whole file content is sent to target - OUT (PC->target) with ZLP [Zero Length Packet] Now the interesting part starts: 4. OUT (PC->target) Setup transaction (request to share DFU state) 5. IN (target->PC) - reply the current DFU state - In the UDC driver the req->completion (with dfu_flush) is called after successful IN transfer. - The dfu_flush() (called from req->completion callback) saves the whole file at once (u-boot doesn't support seek on fs). Such operation takes considerable time. When the file is large - e.g. 26MiB - this time may be more than 5 seconds. 6. OUT (PC->target) - ZLP, is send in the same time when dfu_flush() writes data to eMMC memory. The dfu-util application has hard coded timeout on USB transaction completion set to 5 seconds (it uses libusb calls). When the file to store is large (e.g. 26 MiB) the time needed to write it may excess the dfu-util timeout and following error message will be displayed: "unable to read DFU status" on the HOST PC console. This change is supposed to leverage DFU's part responsible for storing files on file systems. Other DFU operations - i.e. raw/partition write to NAND and eMMC should work as before. The only functional change is the error reporting. When dfu_flush() fails the u-boot prompt will exit with error information and dfu-util application exits afterwards as well. Test HW: - Odroid XU3 (Exynos5433) - test with large file - Trats (Exynos4210) - test for regression - eMMC, raw, Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Reported-by: Alex Gdalevich <agdalevich@axion-biosystems.com> Tested-by: Stephen Warren <swarren@nvidia.com> Tested-by: Heiko Schocher <hs@denx.de>
2016-01-28 15:14:49 +00:00
dfu_set_defer_flush(dfu_get_entity(f_dfu->altsetting));
}
static inline int dfu_get_manifest_timeout(struct dfu_entity *dfu)
{
return dfu->poll_timeout ? dfu->poll_timeout(dfu) :
DFU_MANIFEST_POLL_TIMEOUT;
}
static int handle_getstatus(struct usb_request *req)
{
struct dfu_status *dstat = (struct dfu_status *)req->buf;
struct f_dfu *f_dfu = req->context;
struct dfu_entity *dfu = dfu_get_entity(f_dfu->altsetting);
dfu_set_poll_timeout(dstat, 0);
switch (f_dfu->dfu_state) {
case DFU_STATE_dfuDNLOAD_SYNC:
case DFU_STATE_dfuDNBUSY:
f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_IDLE;
break;
case DFU_STATE_dfuMANIFEST_SYNC:
f_dfu->dfu_state = DFU_STATE_dfuMANIFEST;
break;
case DFU_STATE_dfuMANIFEST:
dfu_set_poll_timeout(dstat, dfu_get_manifest_timeout(dfu));
break;
default:
break;
}
if (f_dfu->poll_timeout)
if (!(f_dfu->blk_seq_num %
(dfu_get_buf_size() / DFU_USB_BUFSIZ)))
dfu_set_poll_timeout(dstat, f_dfu->poll_timeout);
/* send status response */
dstat->bStatus = f_dfu->dfu_status;
dstat->bState = f_dfu->dfu_state;
dstat->iString = 0;
return sizeof(struct dfu_status);
}
static int handle_getstate(struct usb_request *req)
{
struct f_dfu *f_dfu = req->context;
((u8 *)req->buf)[0] = f_dfu->dfu_state;
return sizeof(u8);
}
static inline void to_dfu_mode(struct f_dfu *f_dfu)
{
f_dfu->usb_function.strings = dfu_strings;
f_dfu->usb_function.hs_descriptors = f_dfu->function;
f_dfu->usb_function.descriptors = f_dfu->function;
f_dfu->dfu_state = DFU_STATE_dfuIDLE;
}
static inline void to_runtime_mode(struct f_dfu *f_dfu)
{
f_dfu->usb_function.strings = NULL;
f_dfu->usb_function.hs_descriptors = dfu_runtime_descs;
f_dfu->usb_function.descriptors = dfu_runtime_descs;
}
static int handle_upload(struct usb_request *req, u16 len)
{
struct f_dfu *f_dfu = req->context;
return dfu_read(dfu_get_entity(f_dfu->altsetting), req->buf,
req->length, f_dfu->blk_seq_num);
}
static int handle_dnload(struct usb_gadget *gadget, u16 len)
{
struct usb_composite_dev *cdev = get_gadget_data(gadget);
struct usb_request *req = cdev->req;
struct f_dfu *f_dfu = req->context;
if (len == 0)
f_dfu->dfu_state = DFU_STATE_dfuMANIFEST_SYNC;
req->complete = dnload_request_complete;
return len;
}
/*-------------------------------------------------------------------------*/
/* DFU state machine */
static int state_app_idle(struct f_dfu *f_dfu,
const struct usb_ctrlrequest *ctrl,
struct usb_gadget *gadget,
struct usb_request *req)
{
int value = 0;
switch (ctrl->bRequest) {
case USB_REQ_DFU_GETSTATUS:
value = handle_getstatus(req);
break;
case USB_REQ_DFU_GETSTATE:
value = handle_getstate(req);
break;
case USB_REQ_DFU_DETACH:
f_dfu->dfu_state = DFU_STATE_appDETACH;
to_dfu_mode(f_dfu);
value = RET_ZLP;
break;
default:
value = RET_STALL;
break;
}
return value;
}
static int state_app_detach(struct f_dfu *f_dfu,
const struct usb_ctrlrequest *ctrl,
struct usb_gadget *gadget,
struct usb_request *req)
{
int value = 0;
switch (ctrl->bRequest) {
case USB_REQ_DFU_GETSTATUS:
value = handle_getstatus(req);
break;
case USB_REQ_DFU_GETSTATE:
value = handle_getstate(req);
break;
default:
f_dfu->dfu_state = DFU_STATE_appIDLE;
value = RET_STALL;
break;
}
return value;
}
static int state_dfu_idle(struct f_dfu *f_dfu,
const struct usb_ctrlrequest *ctrl,
struct usb_gadget *gadget,
struct usb_request *req)
{
u16 w_value = le16_to_cpu(ctrl->wValue);
u16 len = le16_to_cpu(ctrl->wLength);
int value = 0;
switch (ctrl->bRequest) {
case USB_REQ_DFU_DNLOAD:
if (len == 0) {
f_dfu->dfu_state = DFU_STATE_dfuERROR;
value = RET_STALL;
break;
}
f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_SYNC;
f_dfu->blk_seq_num = w_value;
value = handle_dnload(gadget, len);
break;
case USB_REQ_DFU_UPLOAD:
f_dfu->dfu_state = DFU_STATE_dfuUPLOAD_IDLE;
f_dfu->blk_seq_num = 0;
value = handle_upload(req, len);
break;
case USB_REQ_DFU_ABORT:
/* no zlp? */
value = RET_ZLP;
break;
case USB_REQ_DFU_GETSTATUS:
value = handle_getstatus(req);
break;
case USB_REQ_DFU_GETSTATE:
value = handle_getstate(req);
break;
case USB_REQ_DFU_DETACH:
/*
* Proprietary extension: 'detach' from idle mode and
* get back to runtime mode in case of USB Reset. As
* much as I dislike this, we just can't use every USB
* bus reset to switch back to runtime mode, since at
* least the Linux USB stack likes to send a number of
* resets in a row :(
*/
f_dfu->dfu_state =
DFU_STATE_dfuMANIFEST_WAIT_RST;
to_runtime_mode(f_dfu);
f_dfu->dfu_state = DFU_STATE_appIDLE;
g_dnl_trigger_detach();
break;
default:
f_dfu->dfu_state = DFU_STATE_dfuERROR;
value = RET_STALL;
break;
}
return value;
}
static int state_dfu_dnload_sync(struct f_dfu *f_dfu,
const struct usb_ctrlrequest *ctrl,
struct usb_gadget *gadget,
struct usb_request *req)
{
int value = 0;
switch (ctrl->bRequest) {
case USB_REQ_DFU_GETSTATUS:
value = handle_getstatus(req);
break;
case USB_REQ_DFU_GETSTATE:
value = handle_getstate(req);
break;
default:
f_dfu->dfu_state = DFU_STATE_dfuERROR;
value = RET_STALL;
break;
}
return value;
}
static int state_dfu_dnbusy(struct f_dfu *f_dfu,
const struct usb_ctrlrequest *ctrl,
struct usb_gadget *gadget,
struct usb_request *req)
{
int value = 0;
switch (ctrl->bRequest) {
case USB_REQ_DFU_GETSTATUS:
value = handle_getstatus(req);
break;
default:
f_dfu->dfu_state = DFU_STATE_dfuERROR;
value = RET_STALL;
break;
}
return value;
}
static int state_dfu_dnload_idle(struct f_dfu *f_dfu,
const struct usb_ctrlrequest *ctrl,
struct usb_gadget *gadget,
struct usb_request *req)
{
u16 w_value = le16_to_cpu(ctrl->wValue);
u16 len = le16_to_cpu(ctrl->wLength);
int value = 0;
switch (ctrl->bRequest) {
case USB_REQ_DFU_DNLOAD:
f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_SYNC;
f_dfu->blk_seq_num = w_value;
value = handle_dnload(gadget, len);
break;
case USB_REQ_DFU_ABORT:
f_dfu->dfu_state = DFU_STATE_dfuIDLE;
value = RET_ZLP;
break;
case USB_REQ_DFU_GETSTATUS:
value = handle_getstatus(req);
break;
case USB_REQ_DFU_GETSTATE:
value = handle_getstate(req);
break;
default:
f_dfu->dfu_state = DFU_STATE_dfuERROR;
value = RET_STALL;
break;
}
return value;
}
static int state_dfu_manifest_sync(struct f_dfu *f_dfu,
const struct usb_ctrlrequest *ctrl,
struct usb_gadget *gadget,
struct usb_request *req)
{
int value = 0;
switch (ctrl->bRequest) {
case USB_REQ_DFU_GETSTATUS:
/* We're MainfestationTolerant */
f_dfu->dfu_state = DFU_STATE_dfuMANIFEST;
value = handle_getstatus(req);
f_dfu->blk_seq_num = 0;
req->complete = dnload_request_flush;
break;
case USB_REQ_DFU_GETSTATE:
value = handle_getstate(req);
break;
default:
f_dfu->dfu_state = DFU_STATE_dfuERROR;
value = RET_STALL;
break;
}
return value;
}
static int state_dfu_manifest(struct f_dfu *f_dfu,
const struct usb_ctrlrequest *ctrl,
struct usb_gadget *gadget,
struct usb_request *req)
{
int value = 0;
switch (ctrl->bRequest) {
case USB_REQ_DFU_GETSTATUS:
/* We're MainfestationTolerant */
f_dfu->dfu_state = DFU_STATE_dfuIDLE;
value = handle_getstatus(req);
f_dfu->blk_seq_num = 0;
puts("DOWNLOAD ... OK\nCtrl+C to exit ...\n");
break;
case USB_REQ_DFU_GETSTATE:
value = handle_getstate(req);
break;
default:
f_dfu->dfu_state = DFU_STATE_dfuERROR;
value = RET_STALL;
break;
}
return value;
}
static int state_dfu_upload_idle(struct f_dfu *f_dfu,
const struct usb_ctrlrequest *ctrl,
struct usb_gadget *gadget,
struct usb_request *req)
{
u16 w_value = le16_to_cpu(ctrl->wValue);
u16 len = le16_to_cpu(ctrl->wLength);
int value = 0;
switch (ctrl->bRequest) {
case USB_REQ_DFU_UPLOAD:
/* state transition if less data then requested */
f_dfu->blk_seq_num = w_value;
value = handle_upload(req, len);
if (value >= 0 && value < len)
f_dfu->dfu_state = DFU_STATE_dfuIDLE;
break;
case USB_REQ_DFU_ABORT:
f_dfu->dfu_state = DFU_STATE_dfuIDLE;
/* no zlp? */
value = RET_ZLP;
break;
case USB_REQ_DFU_GETSTATUS:
value = handle_getstatus(req);
break;
case USB_REQ_DFU_GETSTATE:
value = handle_getstate(req);
break;
default:
f_dfu->dfu_state = DFU_STATE_dfuERROR;
value = RET_STALL;
break;
}
return value;
}
static int state_dfu_error(struct f_dfu *f_dfu,
const struct usb_ctrlrequest *ctrl,
struct usb_gadget *gadget,
struct usb_request *req)
{
int value = 0;
switch (ctrl->bRequest) {
case USB_REQ_DFU_GETSTATUS:
value = handle_getstatus(req);
break;
case USB_REQ_DFU_GETSTATE:
value = handle_getstate(req);
break;
case USB_REQ_DFU_CLRSTATUS:
f_dfu->dfu_state = DFU_STATE_dfuIDLE;
f_dfu->dfu_status = DFU_STATUS_OK;
/* no zlp? */
value = RET_ZLP;
break;
default:
f_dfu->dfu_state = DFU_STATE_dfuERROR;
value = RET_STALL;
break;
}
return value;
}
static dfu_state_fn dfu_state[] = {
state_app_idle, /* DFU_STATE_appIDLE */
state_app_detach, /* DFU_STATE_appDETACH */
state_dfu_idle, /* DFU_STATE_dfuIDLE */
state_dfu_dnload_sync, /* DFU_STATE_dfuDNLOAD_SYNC */
state_dfu_dnbusy, /* DFU_STATE_dfuDNBUSY */
state_dfu_dnload_idle, /* DFU_STATE_dfuDNLOAD_IDLE */
state_dfu_manifest_sync, /* DFU_STATE_dfuMANIFEST_SYNC */
state_dfu_manifest, /* DFU_STATE_dfuMANIFEST */
NULL, /* DFU_STATE_dfuMANIFEST_WAIT_RST */
state_dfu_upload_idle, /* DFU_STATE_dfuUPLOAD_IDLE */
state_dfu_error /* DFU_STATE_dfuERROR */
};
static int
dfu_handle(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
{
struct usb_gadget *gadget = f->config->cdev->gadget;
struct usb_request *req = f->config->cdev->req;
struct f_dfu *f_dfu = f->config->cdev->req->context;
u16 len = le16_to_cpu(ctrl->wLength);
u16 w_value = le16_to_cpu(ctrl->wValue);
int value = 0;
u8 req_type = ctrl->bRequestType & USB_TYPE_MASK;
debug("w_value: 0x%x len: 0x%x\n", w_value, len);
debug("req_type: 0x%x ctrl->bRequest: 0x%x f_dfu->dfu_state: 0x%x\n",
req_type, ctrl->bRequest, f_dfu->dfu_state);
if (req_type == USB_TYPE_STANDARD) {
if (ctrl->bRequest == USB_REQ_GET_DESCRIPTOR &&
(w_value >> 8) == DFU_DT_FUNC) {
value = min(len, (u16) sizeof(dfu_func));
memcpy(req->buf, &dfu_func, value);
}
} else /* DFU specific request */
value = dfu_state[f_dfu->dfu_state] (f_dfu, ctrl, gadget, req);
if (value >= 0) {
req->length = value;
req->zero = value < len;
value = usb_ep_queue(gadget->ep0, req, 0);
if (value < 0) {
debug("ep_queue --> %d\n", value);
req->status = 0;
}
}
return value;
}
/*-------------------------------------------------------------------------*/
static int
dfu_prepare_strings(struct f_dfu *f_dfu, int n)
{
struct dfu_entity *de = NULL;
int i = 0;
f_dfu->strings = calloc(sizeof(struct usb_string), n + 1);
if (!f_dfu->strings)
return -ENOMEM;
for (i = 0; i < n; ++i) {
de = dfu_get_entity(i);
f_dfu->strings[i].s = de->name;
}
f_dfu->strings[i].id = 0;
f_dfu->strings[i].s = NULL;
return 0;
}
static int dfu_prepare_function(struct f_dfu *f_dfu, int n)
{
struct usb_interface_descriptor *d;
int i = 0;
f_dfu->function = calloc(sizeof(struct usb_descriptor_header *), n + 2);
if (!f_dfu->function)
goto enomem;
for (i = 0; i < n; ++i) {
d = calloc(sizeof(*d), 1);
if (!d)
goto enomem;
d->bLength = sizeof(*d);
d->bDescriptorType = USB_DT_INTERFACE;
d->bAlternateSetting = i;
d->bNumEndpoints = 0;
d->bInterfaceClass = USB_CLASS_APP_SPEC;
d->bInterfaceSubClass = 1;
d->bInterfaceProtocol = 2;
f_dfu->function[i] = (struct usb_descriptor_header *)d;
}
/* add DFU Functional Descriptor */
f_dfu->function[i] = calloc(sizeof(dfu_func), 1);
if (!f_dfu->function[i])
goto enomem;
memcpy(f_dfu->function[i], &dfu_func, sizeof(dfu_func));
i++;
f_dfu->function[i] = NULL;
return 0;
enomem:
while (i) {
free(f_dfu->function[--i]);
f_dfu->function[i] = NULL;
}
free(f_dfu->function);
return -ENOMEM;
}
static int dfu_bind(struct usb_configuration *c, struct usb_function *f)
{
struct usb_composite_dev *cdev = c->cdev;
struct f_dfu *f_dfu = func_to_dfu(f);
const char *s;
int alt_num = dfu_get_alt_number();
int rv, id, i;
id = usb_interface_id(c, f);
if (id < 0)
return id;
dfu_intf_runtime.bInterfaceNumber = id;
f_dfu->dfu_state = DFU_STATE_appIDLE;
f_dfu->dfu_status = DFU_STATUS_OK;
rv = dfu_prepare_function(f_dfu, alt_num);
if (rv)
goto error;
rv = dfu_prepare_strings(f_dfu, alt_num);
if (rv)
goto error;
for (i = 0; i < alt_num; i++) {
id = usb_string_id(cdev);
if (id < 0)
return id;
f_dfu->strings[i].id = id;
((struct usb_interface_descriptor *)f_dfu->function[i])
->iInterface = id;
}
to_dfu_mode(f_dfu);
stringtab_dfu.strings = f_dfu->strings;
cdev->req->context = f_dfu;
s = getenv("serial#");
if (s)
g_dnl_set_serialnumber((char *)s);
error:
return rv;
}
static void dfu_unbind(struct usb_configuration *c, struct usb_function *f)
{
struct f_dfu *f_dfu = func_to_dfu(f);
int alt_num = dfu_get_alt_number();
int i;
if (f_dfu->strings) {
i = alt_num;
while (i)
f_dfu->strings[--i].s = NULL;
free(f_dfu->strings);
}
if (f_dfu->function) {
i = alt_num;
while (i) {
free(f_dfu->function[--i]);
f_dfu->function[i] = NULL;
}
free(f_dfu->function);
}
free(f_dfu);
}
static int dfu_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
{
struct f_dfu *f_dfu = func_to_dfu(f);
debug("%s: intf:%d alt:%d\n", __func__, intf, alt);
f_dfu->altsetting = alt;
f_dfu->dfu_state = DFU_STATE_dfuIDLE;
f_dfu->dfu_status = DFU_STATUS_OK;
return 0;
}
static int __dfu_get_alt(struct usb_function *f, unsigned intf)
{
struct f_dfu *f_dfu = func_to_dfu(f);
return f_dfu->altsetting;
}
/* TODO: is this really what we need here? */
static void dfu_disable(struct usb_function *f)
{
struct f_dfu *f_dfu = func_to_dfu(f);
if (f_dfu->config == 0)
return;
debug("%s: reset config\n", __func__);
f_dfu->config = 0;
}
static int dfu_bind_config(struct usb_configuration *c)
{
struct f_dfu *f_dfu;
int status;
f_dfu = calloc(sizeof(*f_dfu), 1);
if (!f_dfu)
return -ENOMEM;
f_dfu->usb_function.name = "dfu";
f_dfu->usb_function.hs_descriptors = dfu_runtime_descs;
f_dfu->usb_function.descriptors = dfu_runtime_descs;
f_dfu->usb_function.bind = dfu_bind;
f_dfu->usb_function.unbind = dfu_unbind;
f_dfu->usb_function.set_alt = dfu_set_alt;
f_dfu->usb_function.get_alt = __dfu_get_alt;
f_dfu->usb_function.disable = dfu_disable;
f_dfu->usb_function.strings = dfu_generic_strings;
f_dfu->usb_function.setup = dfu_handle;
f_dfu->poll_timeout = DFU_DEFAULT_POLL_TIMEOUT;
status = usb_add_function(c, &f_dfu->usb_function);
if (status)
free(f_dfu);
return status;
}
int dfu_add(struct usb_configuration *c)
{
int id;
id = usb_string_id(c->cdev);
if (id < 0)
return id;
strings_dfu_generic[0].id = id;
dfu_intf_runtime.iInterface = id;
debug("%s: cdev: 0x%p gadget:0x%p gadget->ep0: 0x%p\n", __func__,
c->cdev, c->cdev->gadget, c->cdev->gadget->ep0);
return dfu_bind_config(c);
}
DECLARE_GADGET_BIND_CALLBACK(usb_dnl_dfu, dfu_add);