From f30abc1f75f483ffe78d92d5109b6c1d700925a3 Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Fri, 23 Sep 2022 20:20:38 +0200
Subject: added x230x programming and switching utility; fe310 flash utility;

---
 util/upload.c | 123 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 util/upload.c

(limited to 'util/upload.c')

diff --git a/util/upload.c b/util/upload.c
new file mode 100644
index 0000000..5eb5d81
--- /dev/null
+++ b/util/upload.c
@@ -0,0 +1,123 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include "tty.h"
+
+static const uint8_t magic[] =
+    {0x2D, 0xC0, 0x3B, 0x5F, 0xEA, 0xE3, 0x1A, 0x3A, 0x83, 0x11, 0x6A, 0x33, 0x98, 0x46, 0x1C, 0x47};
+
+#define ACK         0x05
+#define NACK        0x0A
+#define BLK_SIZE    256
+
+void usage(char *p) {
+    fprintf(stderr, "Usage: %s <tty> <firmware>\n", p);
+    exit(1);
+}
+
+uint32_t crc32x(unsigned char *buf, size_t len, uint32_t crc) {
+    int i;
+
+    crc = ~crc;
+    while (len--) {
+        crc ^= *buf++;
+        for (i=0; i<8; i++) {
+            uint32_t t = ~((crc & 1) - 1);
+            crc = (crc >> 1) ^ (0xEDB88320 & t);
+        }
+    }
+
+    return ~crc;
+}
+
+void set_buffer(uint32_t addr, uint8_t *buf) {
+    uint32_t crc32;
+
+    buf[0] = addr >> 24;
+    buf[1] = addr >> 16;
+    buf[2] = addr >> 8;
+    buf[3] = addr;
+    crc32 = crc32x(buf, BLK_SIZE + sizeof(uint32_t), 0xffffffff);
+    buf[BLK_SIZE + 4] = crc32 >> 24;
+    buf[BLK_SIZE + 5] = crc32 >> 16;
+    buf[BLK_SIZE + 6] = crc32 >> 8;
+    buf[BLK_SIZE + 7] = crc32;
+}
+
+static void _write(int fd, const uint8_t *buf, size_t size) {
+    int rv = 0;
+
+    do {
+        rv += write(fd, buf + rv, size - rv);
+    } while (rv != size);
+}
+
+int main(int argc, char *argv[]) {
+    int tty_fd, fw_fd;
+    uint8_t buf[BLK_SIZE + 2 * sizeof(uint32_t)];
+    uint32_t addr;
+    int rv;
+
+    if (argc != 3) {
+        usage(argv[0]);
+    }
+
+    tty_fd = tty_open(argv[1]);
+    if (tty_fd < 0) {
+        fprintf(stderr, "TTY OPEN ERROR %i: %s\n", errno, strerror(errno));
+        return 1;
+    }
+
+    fw_fd = open(argv[2], O_RDONLY);
+    if (fw_fd < 0) {
+        fprintf(stderr, "FW OPEN ERROR %i: %s\n", errno, strerror(errno));
+        return 1;
+    }
+
+    while ((rv = read(tty_fd, buf, sizeof(buf))));
+
+    _write(tty_fd, magic, sizeof(magic));
+    *buf = NACK;
+    read(tty_fd, buf, 1);
+    if (*buf != ACK) {
+        fprintf(stderr, "CONNECT ERROR: %x\n", *buf);
+        return 1;
+    }
+    printf("CONNECTED\n");
+
+    addr = 0;
+    memset(buf, 0xff, sizeof(buf));
+    do {
+        rv = read(fw_fd, buf + sizeof(uint32_t), BLK_SIZE);
+        if (rv < 0) {
+            fprintf(stderr, "FW READ ERROR %i: %s\n", errno, strerror(errno));
+            return 1;
+        }
+        if (rv == 0) {
+            addr = -1;
+        }
+
+        set_buffer(addr, buf);
+        do {
+            _write(tty_fd, buf, sizeof(buf));
+            *buf = NACK;
+            read(tty_fd, buf, 1);
+            if (*buf == NACK) {
+                fprintf(stderr, "NACK...\n");
+            }
+        } while (*buf != ACK);
+        addr += BLK_SIZE;
+        memset(buf, 0xff, sizeof(buf));
+    } while (rv);
+
+    close(tty_fd);
+    close(fw_fd);
+
+    return 0;
+}
-- 
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