mirror of
https://github.com/tillitis/tillitis-key1.git
synced 2024-10-01 01:45:38 -04:00
157 lines
2.6 KiB
C
157 lines
2.6 KiB
C
/*
|
|
* Copyright (C) 2022 - Tillitis AB
|
|
* SPDX-License-Identifier: GPL-2.0-only
|
|
*/
|
|
|
|
#include "proto.h"
|
|
#include "../tk1_mem.h"
|
|
#include "lib.h"
|
|
#include "types.h"
|
|
|
|
// clang-format off
|
|
static volatile uint32_t *can_rx = (volatile uint32_t *)TK1_MMIO_UART_RX_STATUS;
|
|
static volatile uint32_t *rx = (volatile uint32_t *)TK1_MMIO_UART_RX_DATA;
|
|
static volatile uint32_t *can_tx = (volatile uint32_t *)TK1_MMIO_UART_TX_STATUS;
|
|
static volatile uint32_t *tx = (volatile uint32_t *)TK1_MMIO_UART_TX_DATA;
|
|
static volatile uint32_t *led = (volatile uint32_t *)TK1_MMIO_TK1_LED;
|
|
// clang-format on
|
|
|
|
uint8_t genhdr(uint8_t id, uint8_t endpoint, uint8_t status, enum cmdlen len)
|
|
{
|
|
return (id << 5) | (endpoint << 3) | (status << 2) | len;
|
|
}
|
|
|
|
int parseframe(uint8_t b, struct frame_header *hdr)
|
|
{
|
|
if ((b & 0x80) != 0) {
|
|
// Bad version
|
|
return -1;
|
|
}
|
|
|
|
if ((b & 0x4) != 0) {
|
|
// Must be 0
|
|
return -1;
|
|
}
|
|
|
|
hdr->id = (b & 0x60) >> 5;
|
|
hdr->endpoint = (b & 0x18) >> 3;
|
|
|
|
// Length
|
|
switch (b & 0x3) {
|
|
case LEN_1:
|
|
hdr->len = 1;
|
|
break;
|
|
case LEN_4:
|
|
hdr->len = 4;
|
|
break;
|
|
case LEN_32:
|
|
hdr->len = 32;
|
|
break;
|
|
case LEN_128:
|
|
hdr->len = 128;
|
|
break;
|
|
default:
|
|
// Unknown length
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Send a firmware reply with a frame header, response code rspcode and
|
|
// following data in buf
|
|
void fwreply(struct frame_header hdr, enum fwcmd rspcode, uint8_t *buf)
|
|
{
|
|
size_t nbytes;
|
|
enum cmdlen len; // length covering (rspcode + length of buf)
|
|
|
|
switch (rspcode) {
|
|
case FW_RSP_NAME_VERSION:
|
|
len = LEN_32;
|
|
nbytes = 32;
|
|
break;
|
|
|
|
case FW_RSP_LOAD_APP:
|
|
len = LEN_4;
|
|
nbytes = 4;
|
|
break;
|
|
|
|
case FW_RSP_LOAD_APP_DATA:
|
|
len = LEN_4;
|
|
nbytes = 4;
|
|
break;
|
|
|
|
case FW_RSP_LOAD_APP_DATA_READY:
|
|
len = LEN_128;
|
|
nbytes = 128;
|
|
break;
|
|
|
|
case FW_RSP_GET_UDI:
|
|
len = LEN_32;
|
|
nbytes = 32;
|
|
break;
|
|
|
|
default:
|
|
htif_puts("fwreply(): Unknown response code: 0x");
|
|
htif_puthex(rspcode);
|
|
htif_lf();
|
|
return;
|
|
}
|
|
|
|
// Frame Protocol Header
|
|
writebyte(genhdr(hdr.id, hdr.endpoint, 0x0, len));
|
|
|
|
// FW protocol header
|
|
writebyte(rspcode);
|
|
nbytes--;
|
|
|
|
write(buf, nbytes);
|
|
}
|
|
|
|
void writebyte(uint8_t b)
|
|
{
|
|
for (;;) {
|
|
if (*can_tx) {
|
|
*tx = b;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
void write(uint8_t *buf, size_t nbytes)
|
|
{
|
|
for (int i = 0; i < nbytes; i++) {
|
|
writebyte(buf[i]);
|
|
}
|
|
}
|
|
|
|
uint8_t readbyte()
|
|
{
|
|
for (;;) {
|
|
if (*can_rx) {
|
|
return *rx;
|
|
}
|
|
}
|
|
}
|
|
|
|
uint8_t readbyte_ledflash(int ledvalue, int loopcount)
|
|
{
|
|
int led_on = 0;
|
|
for (;;) {
|
|
*led = led_on ? ledvalue : 0;
|
|
for (int i = 0; i < loopcount; i++) {
|
|
if (*can_rx) {
|
|
return *rx;
|
|
}
|
|
}
|
|
led_on = !led_on;
|
|
}
|
|
}
|
|
|
|
void read(uint8_t *buf, size_t nbytes)
|
|
{
|
|
for (int n = 0; n < nbytes; n++) {
|
|
buf[n] = readbyte();
|
|
}
|
|
}
|