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102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
/*
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* boot/dfu_common.c - DFU protocol engine parts common to App/DFU
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*
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* Written 2008-2011, 2013 by Werner Almesberger
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* Copyright 2008-2011, 2013 Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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/*
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* http://www.usb.org/developers/devclass_docs/DFU_1.1.pdf
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*/
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/*
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* A few, erm, shortcuts:
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*
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* - we don't bother with the app* states since DFU is all this firmware does
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* - after DFU_DNLOAD, we just block until things are written, so we never
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* enter dfuDNLOAD_SYNC or dfuDNBUSY
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* - no dfuMANIFEST_SYNC, dfuMANIFEST, or dfuMANIFEST_WAIT_RESET
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* - to keep our buffers small, we only accept EP0-sized blocks
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include "usb.h"
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#include "dfu.h"
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#include "../board.h"
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#include "../sernum.h"
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#ifndef NULL
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#define NULL 0
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#endif
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#define debug(...)
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#define error(...)
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static const uint8_t functional_descriptor[] = {
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9, /* bLength */
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DFU_DT_FUNCTIONAL, /* bDescriptorType */
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0xf, /* bmAttributes (claim omnipotence :-) */
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LE(0xffff), /* wDetachTimeOut (we're very patient) */
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LE(EP0_SIZE), /* wTransferSize */
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LE(0x101), /* bcdDFUVersion */
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};
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/*
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* The worst-case activity would be flashing a one page and erasing another
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* one, would should take less than 10 ms. A 100 ms timeout ought to be plenty.
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*/
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struct dfu dfu = {
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OK, /* bStatus */
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LE(100), 0, /* bwPollTimeout, 100 ms */
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dfuIDLE, /* bState */
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0, /* iString */
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};
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bool dfu_setup_common(const struct setup_request *setup)
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{
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switch (setup->bmRequestType | setup->bRequest << 8) {
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case DFU_FROM_DEV(DFU_GETSTATUS):
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debug("DFU_GETSTATUS\n");
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usb_send(&eps[0], (uint8_t *) &dfu, sizeof(dfu), NULL, NULL);
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return 1;
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case DFU_TO_DEV(DFU_CLRSTATUS):
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debug("DFU_CLRSTATUS\n");
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dfu.state = dfuIDLE;
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dfu.status = OK;
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return 1;
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case DFU_FROM_DEV(DFU_GETSTATE):
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debug("DFU_GETSTATE\n");
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usb_send(&eps[0], &dfu.state, 1, NULL, NULL);
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return 1;
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default:
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error("DFU rt %x, rq%x ?\n",
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setup->bmRequestType, setup->bRequest);
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return 0;
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}
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}
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bool dfu_my_descr(uint8_t type, uint8_t index, const uint8_t **reply,
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uint8_t *size)
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{
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if (type != DFU_DT_FUNCTIONAL)
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return sernum_get_descr(type, index, reply, size);
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*reply = functional_descriptor;
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*size = sizeof(functional_descriptor);
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return 1;
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}
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