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- /* Copyright (c) 2011,2012 Simon Schubert <[email protected]>.
- * Modifications by Jacob Alexander 2014 <[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/>.
- */
-
- // ----- Local Includes -----
-
- #include "usb.h"
- #include "dfu.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_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;
- /* case USB_CTRL_REQ_DFU_UPLOAD: */
- 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_write_t setup_write, dfu_finish_write_t finish_write, struct dfu_ctx *ctx )
- {
- ctx->state = DFU_STATE_dfuIDLE;
- 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,
- };
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