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dfu.c
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dfu.c
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/* Copyright (c) 2011,2012 Simon Schubert <[email protected]>.
* Modifications by Jacob Alexander 2014-2020 <[email protected]>
*
* This program 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 3 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, see <http://www.gnu.org/licenses/>.
*/
// ----- Includes -----
// Project Includes
#include <Lib/mcu_compat.h>
#include <Lib/gpio.h>
#if defined(_sam_)
#include <common/services/usb/udc/udc.h>
#endif
#if DFU_EXTRA_BLE_SWD_SUPPORT == 1
#include "swd/swd_host.h"
#endif
// Local Includes
#include "usb.h"
#include "dfu.h"
#include "debug.h"
#include "weak.h"
// ----- Variables -----
// ----- Functions -----
void dfu_write_done( enum dfu_status err, struct dfu_ctx *ctx )
{
ctx->status = err;
if ( ctx->status == DFU_STATUS_OK )
{
switch ( ctx->state )
{
case DFU_STATE_dfuDNBUSY:
ctx->state = DFU_STATE_dfuDNLOAD_IDLE;
break;
default:
break;
}
} else
{
ctx->state = DFU_STATE_dfuERROR;
}
}
static void dfu_dnload_complete(void *buf, ssize_t len, void *cbdata )
{
struct dfu_ctx *ctx = cbdata;
if ( len > 0 )
{
ctx->state = DFU_STATE_dfuDNBUSY;
}
else
{
ctx->state = DFU_STATE_dfuMANIFEST;
}
#if DFU_EXTRA_BLE_SWD_SUPPORT == 1 && defined(_sam_)
// Retrieve active bAlternateSetting
uint8_t bAlternateSetting = udc_get_interface_desc()->bAlternateSetting;
#ifdef FLASH_DEBUG
print("bAlternateSetting: ");
printHex(bAlternateSetting);
print(NL);
#endif
#else
uint8_t bAlternateSetting = 0;
#endif
ctx->status = ctx->finish_write(buf, ctx->off, len, bAlternateSetting);
// If this is the first block (and was used for key validation), don't increment offset
switch ( ctx->verified )
{
case DFU_VALIDATION_PENDING:
ctx->verified = DFU_VALIDATION_OK;
break;
case DFU_VALIDATION_OK:
ctx->off += len;
break;
default:
break;
}
ctx->len = len;
if ( ctx->status != DFU_STATUS_async )
{
dfu_write_done( ctx->status, ctx );
}
usb_handle_control_status( ctx->state == DFU_STATE_dfuERROR );
// If we failed validation, reset
if ( ctx->verified == DFU_VALIDATION_FAILED )
{
SOFTWARE_RESET();
}
}
static void dfu_reset_system( void *buf, ssize_t len, void *cbdata )
{
SOFTWARE_RESET();
}
int dfu_handle_control( struct usb_ctrl_req_t *req, void *data )
{
struct dfu_ctx *ctx = data;
int fail = 1;
#if DFU_EXTRA_BLE_SWD_SUPPORT == 1 && defined(_sam_)
// Retrieve active bAlternateSetting
uint8_t bAlternateSetting = udc_get_interface_desc()->bAlternateSetting;
#ifdef FLASH_DEBUG
print("bAlternateSetting: ");
printHex(bAlternateSetting);
print(NL);
#endif
#else
uint8_t bAlternateSetting = 0;
#endif
switch (req->bRequest)
{
case MS_VENDOR_CODE:
/* Microsoft extensions */
switch (req->wIndex) {
case USB_CTRL_REQ_MSFT_COMPAT_ID:
usb_ep0_tx_cp(&msft_extended_compat_desc, msft_extended_compat_desc.dwLength, req->wLength, NULL, NULL);
}
goto out_no_status;
default:
break;
}
switch ( (enum dfu_ctrl_req_code)req->bRequest )
{
case USB_CTRL_REQ_DFU_DETACH:
ctx->state = DFU_STATE_dfuIDLE;
switch (bAlternateSetting)
{
case 0: // Reset MCU and (attempt to) boot to firmware
#if defined(BOOT_DEBUG) && defined(_sam_)
// Reset GPNVM bits to jump back to SAM-BA
print("Enabling ROM bootloader..." NL);
EraseUserSignature(); // Make sure signature is erased to handle re-flash testing
flash_clear_gpnvm(1);
Reset_FullReset();
#else
usb_handle_control_status_cb(dfu_reset_system);
#endif
break;
#if DFU_EXTRA_BLE_SWD_SUPPORT == 1
case 1: // Reset BLE device using SWD
print("Resetting BLE via SWD..." NL);
Reset_AssertExternal(10, true);
Reset_CleanupExternal();
swd_off();
break;
#endif
}
goto out_no_status;
case USB_CTRL_REQ_DFU_DNLOAD:
{
void *buf;
switch ( ctx->state )
{
case DFU_STATE_dfuIDLE:
ctx->off = 0;
break;
case DFU_STATE_dfuDNLOAD_IDLE:
break;
default:
goto err;
}
/**
* XXX we are not allowed to STALL here, and we need to eat all transferred data.
* better not allow setup_write to break the protocol.
*/
ctx->status = ctx->setup_write(ctx->off, req->wLength, &buf, bAlternateSetting);
if ( ctx->status != DFU_STATUS_OK )
{
ctx->state = DFU_STATE_dfuERROR;
goto err_have_status;
}
if ( req->wLength > 0 )
{
usb_ep0_rx( buf, req->wLength, dfu_dnload_complete, ctx );
}
else
{
dfu_dnload_complete( NULL, 0, ctx );
}
goto out_no_status;
}
case USB_CTRL_REQ_DFU_UPLOAD:
{
void *buf;
size_t len = 0;
switch ( ctx->state )
{
case DFU_STATE_dfuIDLE:
break;
case DFU_STATE_dfuUPLOAD_IDLE:
break;
default:
goto err;
}
// Compute the requested offset
ctx->off = USB_DFU_TRANSFER_SIZE * req->wValue;
// Find which sector to read
ctx->status = ctx->setup_read(ctx->off, &len, &buf, bAlternateSetting);
#ifdef FLASH_DEBUG
print("UPLOAD req:");
printHex( req->wValue );
print(" off:");
printHex( ctx->off );
print(" len:");
printHex( len );
print(" reqlen: ");
printHex( req->wLength );
print(" addr:");
printHex( (uint32_t)buf );
print(" bAlternateSetting:");
printHex(bAlternateSetting);
#endif
if ( ctx->status != DFU_STATUS_OK || len > req->wLength )
{
ctx->state = DFU_STATE_dfuERROR;
goto err_have_status;
}
// Send bytes to Host
// Successfully transferred data to USB
if ( usb_ep0_tx( buf, len, len, NULL, NULL ) != -1 )
{
ctx->state = len < req->wLength
? DFU_STATE_dfuIDLE
: DFU_STATE_dfuUPLOAD_IDLE;
fail = 0;
}
// Problem transferring via USB
else
{
ctx->state = DFU_STATE_dfuERROR;
}
#ifdef FLASH_DEBUG
print(" state:");
printHex( ctx->state );
print( NL );
#endif
goto out;
}
case USB_CTRL_REQ_DFU_GETSTATUS:
{
struct dfu_status_t st;
st.bState = ctx->state;
st.bStatus = ctx->status;
st.bwPollTimeout = 1000; /* XXX */
/**
* If we're in DFU_STATE_dfuMANIFEST, we just finished
* the download, and we're just about to send our last
* status report. Once the report has been sent, go
* and reset the system to put the new firmware into
* effect.
*/
usb_ep0_tx_cp( &st, sizeof(st), req->wLength, NULL, NULL );
switch ( ctx->state )
{
case DFU_STATE_dfuMANIFEST:
ctx->state = DFU_STATE_dfuMANIFEST_WAIT_RESET;
// Download finished, just waiting for reset now
if (bAlternateSetting == 0)
{
Chip_download_complete();
}
break;
case DFU_STATE_dfuMANIFEST_WAIT_RESET:
ctx->state = DFU_STATE_dfuIDLE;
switch (bAlternateSetting)
{
case 0: // MCU Flashing
// XXX (HaaTa): With newer versions of dfu-util we should not reset here.
// We should only reset when host sends DFU_DETACH request or reset request.
//usb_handle_control_status_cb(dfu_reset_system);
#if defined(_sam_)
// Make sure we aren't going to halt on reset
*C_DEMCR = 0;
#endif
break;
#if DFU_EXTRA_BLE_SWD_SUPPORT == 1
case 1: // SWD Flashing
Reset_AssertExternal(10, true);
Reset_CleanupExternal();
swd_off();
break;
#endif
}
goto out_no_status;
default:
break;
}
break;
}
case USB_CTRL_REQ_DFU_CLRSTATUS:
ctx->state = DFU_STATE_dfuIDLE;
ctx->status = DFU_STATUS_OK;
break;
case USB_CTRL_REQ_DFU_GETSTATE:
{
uint8_t st = ctx->state;
usb_ep0_tx_cp( &st, sizeof(st), req->wLength, NULL, NULL );
break;
}
case USB_CTRL_REQ_DFU_ABORT:
switch ( ctx->state )
{
case DFU_STATE_dfuIDLE:
case DFU_STATE_dfuDNLOAD_IDLE:
case DFU_STATE_dfuUPLOAD_IDLE:
ctx->state = DFU_STATE_dfuIDLE;
break;
default:
goto err;
}
break;
default:
return 0;
}
fail = 0;
goto out;
err:
ctx->status = DFU_STATUS_errSTALLEDPKT;
err_have_status:
ctx->state = DFU_STATE_dfuERROR;
out:
usb_handle_control_status( fail );
out_no_status:
return 1;
}
void dfu_init( dfu_setup_read_t setup_read, dfu_setup_write_t setup_write, dfu_finish_write_t finish_write, struct dfu_ctx *ctx )
{
ctx->state = DFU_STATE_dfuIDLE;
ctx->setup_read = setup_read;
ctx->setup_write = setup_write;
ctx->finish_write = finish_write;
usb_attach_function(&dfu_function, &ctx->header);
}
const struct usbd_function dfu_function = {
.control = dfu_handle_control,
.interface_count = USB_FUNCTION_DFU_IFACE_COUNT,
};