spl_ymodem.c
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/*
* (C) Copyright 2000-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2011
* Texas Instruments, <www.ti.com>
*
* Matt Porter <mporter@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <spl.h>
#include <xyzModem.h>
#include <asm/u-boot.h>
#include <asm/utils.h>
#include <libfdt.h>
#define BUF_SIZE 1024
/*
* Information required to load image using ymodem.
*
* @image_read: Now of bytes read from the image.
* @buf: pointer to the previous read block.
*/
struct ymodem_fit_info {
int image_read;
char *buf;
};
static int getcymodem(void) {
if (tstc())
return (getc());
return -1;
}
static ulong ymodem_read_fit(struct spl_load_info *load, ulong offset,
ulong size, void *addr)
{
int res, err;
struct ymodem_fit_info *info = load->priv;
char *buf = info->buf;
while (info->image_read < offset) {
res = xyzModem_stream_read(buf, BUF_SIZE, &err);
if (res <= 0)
return res;
info->image_read += res;
}
if (info->image_read > offset) {
res = info->image_read - offset;
memcpy(addr, &buf[BUF_SIZE - res], res);
addr = addr + res;
}
while (info->image_read < offset + size) {
res = xyzModem_stream_read(buf, BUF_SIZE, &err);
if (res <= 0)
return res;
memcpy(addr, buf, res);
info->image_read += res;
addr += res;
}
return size;
}
static int spl_ymodem_load_image(struct spl_image_info *spl_image,
struct spl_boot_device *bootdev)
{
int size = 0;
int err;
int res;
int ret;
connection_info_t info;
char buf[BUF_SIZE];
ulong addr = 0;
info.mode = xyzModem_ymodem;
ret = xyzModem_stream_open(&info, &err);
if (ret) {
printf("spl: ymodem err - %s\n", xyzModem_error(err));
return ret;
}
res = xyzModem_stream_read(buf, BUF_SIZE, &err);
if (res <= 0)
goto end_stream;
if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
image_get_magic((struct image_header *)buf) == FDT_MAGIC) {
struct spl_load_info load;
struct ymodem_fit_info info;
debug("Found FIT\n");
load.dev = NULL;
load.priv = (void *)&info;
load.filename = NULL;
load.bl_len = 1;
info.buf = buf;
info.image_read = BUF_SIZE;
load.read = ymodem_read_fit;
ret = spl_load_simple_fit(spl_image, &load, 0, (void *)buf);
size = info.image_read;
while ((res = xyzModem_stream_read(buf, BUF_SIZE, &err)) > 0)
size += res;
} else {
ret = spl_parse_image_header(spl_image,
(struct image_header *)buf);
if (ret)
return ret;
addr = spl_image->load_addr;
memcpy((void *)addr, buf, res);
size += res;
addr += res;
while ((res = xyzModem_stream_read(buf, BUF_SIZE, &err)) > 0) {
memcpy((void *)addr, buf, res);
size += res;
addr += res;
}
}
end_stream:
xyzModem_stream_close(&err);
xyzModem_stream_terminate(false, &getcymodem);
printf("Loaded %d bytes\n", size);
return 0;
}
SPL_LOAD_IMAGE_METHOD("UART", 0, BOOT_DEVICE_UART, spl_ymodem_load_image);