u-boot/common/spl/spl_ymodem.c
Marek Vasut 792dd57091 spl: ymodem: Add support for loading full fitImages
Add support for loading fully featured fitImages over YModem in SPL.
This is useful when various advanced features of full fitImages are
needed in SPL.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@konsulko.com>
2019-04-22 18:13:23 -04:00

173 lines
3.8 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (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>
*/
#include <common.h>
#include <spl.h>
#include <xyzModem.h>
#include <asm/u-boot.h>
#include <linux/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)
{
ulong size = 0;
int err;
int res;
int ret;
connection_info_t info;
char buf[BUF_SIZE];
struct image_header *ih = NULL;
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_FULL) &&
image_get_magic((struct image_header *)buf) == FDT_MAGIC) {
addr = CONFIG_SYS_LOAD_ADDR;
ih = (struct image_header *)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;
}
ret = spl_parse_image_header(spl_image, ih);
if (ret)
return ret;
} else 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 {
ih = (struct image_header *)buf;
ret = spl_parse_image_header(spl_image, ih);
if (ret)
goto end_stream;
#ifdef CONFIG_SPL_GZIP
if (ih->ih_comp == IH_COMP_GZIP)
addr = CONFIG_SYS_LOAD_ADDR;
else
#endif
addr = spl_image->load_addr;
memcpy((void *)addr, buf, res);
ih = (struct image_header *)addr;
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 %lu bytes\n", size);
#ifdef CONFIG_SPL_GZIP
if (!(IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
image_get_magic((struct image_header *)buf) == FDT_MAGIC) &&
(ih->ih_comp == IH_COMP_GZIP)) {
if (gunzip((void *)(spl_image->load_addr + sizeof(*ih)),
CONFIG_SYS_BOOTM_LEN,
(void *)(CONFIG_SYS_LOAD_ADDR + sizeof(*ih)),
&size)) {
puts("Uncompressing error\n");
return -EIO;
}
}
#endif
return ret;
}
SPL_LOAD_IMAGE_METHOD("UART", 0, BOOT_DEVICE_UART, spl_ymodem_load_image);