137 lines
4.9 KiB
C
137 lines
4.9 KiB
C
/*
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* (C) 2018, sysmocom -s.f.m.c. GmbH, Author: Kevin Redon <kredon@sysmocom.de>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "atmel_start.h"
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#include "usb_start.h"
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#if CONF_USBD_HS_SP
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static uint8_t single_desc_bytes[] = {
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/* Device descriptors and Configuration descriptors list. */
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DFUD_HS_DESCES_LS_FS};
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static uint8_t single_desc_bytes_hs[] = {
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/* Device descriptors and Configuration descriptors list. */
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DFUD_HS_DESCES_HS};
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#else
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static uint8_t single_desc_bytes[] = {
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/* Device descriptors and Configuration descriptors list. */
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DFUD_DESCES_LS_FS};
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#endif
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static struct usbd_descriptors single_desc[]
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= {{single_desc_bytes, single_desc_bytes + sizeof(single_desc_bytes)}
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#if CONF_USBD_HS_SP
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,
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{single_desc_bytes_hs, single_desc_bytes_hs + sizeof(single_desc_bytes_hs)}
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#endif
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};
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/** USB DFU functional descriptor (with DFU attributes) */
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static const uint8_t usb_dfu_func_desc_bytes[] = {DFUD_IFACE_DESCB};
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static const usb_dfu_func_desc_t* usb_dfu_func_desc = (usb_dfu_func_desc_t*)&usb_dfu_func_desc_bytes;
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/** Ctrl endpoint buffer */
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static uint8_t ctrl_buffer[64];
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/**
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* \brief USB DFU Init
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*/
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void usb_dfu_init(void)
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{
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usbdc_init(ctrl_buffer);
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dfudf_init();
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usbdc_start(single_desc);
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usbdc_attach();
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}
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/**
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* \brief reset device
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*/
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static void usb_dfu_reset(const enum usb_event ev, const uint32_t param)
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{
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(void)param; // not used
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switch (ev) {
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case USB_EV_RESET:
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usbdc_detach(); // make sure we are detached
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NVIC_SystemReset(); // initiate a system reset
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break;
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default:
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break;
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}
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}
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/**
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* \brief Enter USB DFU runtime
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*/
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void usb_dfu(void)
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{
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while (!dfudf_is_enabled()); // wait for DFU to be installed
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gpio_set_pin_level(LED_SYSTEM, false); // switch LED on to indicate USB DFU stack is ready
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ASSERT(hri_nvmctrl_read_STATUS_BOOTPROT_bf(FLASH_0.dev.hw) <= 15);
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uint32_t application_start_address = (15 - hri_nvmctrl_read_STATUS_BOOTPROT_bf(FLASH_0.dev.hw)) * 8192; // calculate bootloader size to know where we should write the application firmware
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ASSERT(application_start_address > 0);
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while (true) { // main DFU infinite loop
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// run the second part of the USB DFU state machine handling non-USB aspects
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if (USB_DFU_STATE_DFU_DNLOAD_SYNC == dfu_state || USB_DFU_STATE_DFU_DNBUSY == dfu_state) { // there is some data to be flashed
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gpio_set_pin_level(LED_SYSTEM, true); // switch LED off to indicate we are flashing
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if (dfu_download_length > 0) { // there is some data to be flashed
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int32_t rc = flash_write(&FLASH_0, application_start_address + dfu_download_offset, dfu_download_data, dfu_download_length); // write downloaded data chunk to flash
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if (ERR_NONE == rc) {
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dfu_state = USB_DFU_STATE_DFU_DNLOAD_IDLE; // indicate flashing this block has been completed
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} else { // there has been a programming error
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dfu_state = USB_DFU_STATE_DFU_ERROR;
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if (ERR_BAD_ADDRESS == rc) {
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dfu_status = USB_DFU_STATUS_ERR_ADDRESS;
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} else if (ERR_DENIED == rc) {
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dfu_status = USB_DFU_STATUS_ERR_WRITE;
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} else {
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dfu_status = USB_DFU_STATUS_ERR_PROG;
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}
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}
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} else { // there was no data to flash
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// this case should not happen, but it's not a critical error
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dfu_state = USB_DFU_STATE_DFU_DNLOAD_IDLE; // indicate flashing can continue
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}
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gpio_set_pin_level(LED_SYSTEM, false); // switch LED on to indicate USB DFU can resume
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}
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if (USB_DFU_STATE_DFU_MANIFEST == dfu_state) { // we can start manifestation (finish flashing)
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// in theory every DFU files should have a suffix to with a CRC to check the data
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// in practice most downloaded files are just the raw binary with DFU suffix
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dfu_manifestation_complete = true; // we completed flashing and all checks
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if (usb_dfu_func_desc->bmAttributes & USB_DFU_ATTRIBUTES_MANIFEST_TOLERANT) {
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dfu_state = USB_DFU_STATE_DFU_MANIFEST_SYNC;
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} else {
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dfu_state = USB_DFU_STATE_DFU_MANIFEST_WAIT_RESET;
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}
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}
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if (USB_DFU_STATE_DFU_MANIFEST_WAIT_RESET == dfu_state) {
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if (usb_dfu_func_desc->bmAttributes & USB_DFU_ATTRIBUTES_WILL_DETACH) {
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usb_dfu_reset(USB_EV_RESET, 0); // immediately reset
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} else { // wait for USB reset
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usb_d_register_callback(USB_D_CB_EVENT, (FUNC_PTR)usb_dfu_reset); // register new USB reset event handler
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}
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}
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}
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}
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void usb_init(void)
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{
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usb_dfu_init();
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}
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