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controller/Bootloader/dfu.c

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/* Copyright (c) 2011,2012 Simon Schubert <2@0x2c.org>.
* Modifications by Jacob Alexander 2014-2015 <haata@kiibohd.com>
*
* 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/>.
*/
// ----- Local Includes -----
#include "usb.h"
#include "dfu.h"
#include "debug.h"
// ----- 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;
ctx->status = ctx->finish_write(buf, ctx->off, len);
ctx->off += len;
ctx->len = len;
if (ctx->status != DFU_STATUS_async)
dfu_write_done(ctx->status, ctx);
usb_handle_control_status(ctx->state == DFU_STATE_dfuERROR);
}
static void dfu_reset_system( void *buf, ssize_t len, void *cbdata )
{
SOFTWARE_RESET();
}
static int dfu_handle_control( struct usb_ctrl_req_t *req, void *data )
{
struct dfu_ctx *ctx = data;
int fail = 1;
switch ( (enum dfu_ctrl_req_code)req->bRequest )
{
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 );
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: {
#if defined(_mk20dx256vlh7_) // Kiibohd-dfu
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 );
#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 );
#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;
#else
ctx->state = DFU_STATE_dfuERROR;
goto out;
#endif
}
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);
if (ctx->state == DFU_STATE_dfuMANIFEST) {
usb_handle_control_status_cb(dfu_reset_system);
goto out_no_status;
}
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;
#if defined(_mk20dx256vlh7_) // Kiibohd-dfu
ctx->setup_read = setup_read;
#endif
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,
};