This provides a way to load a FIT containing U-Boot and a selection of device tree files from UART.
Reviewed-by: Tom Rini trini@konsulko.com Signed-off-by: Lokesh Vutla lokeshvutla@ti.com --- common/spl/spl_ymodem.c | 98 ++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 84 insertions(+), 14 deletions(-)
diff --git a/common/spl/spl_ymodem.c b/common/spl/spl_ymodem.c index 4f26ea5..5402301 100644 --- a/common/spl/spl_ymodem.c +++ b/common/spl/spl_ymodem.c @@ -14,15 +14,60 @@ #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; +} + int spl_ymodem_load_image(void) { int size = 0; @@ -31,30 +76,55 @@ int spl_ymodem_load_image(void) int ret; connection_info_t info; char buf[BUF_SIZE]; - ulong store_addr = ~0; 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(&load, 0, (void *)buf); + size = info.image_read;
- if (!ret) { - while ((res = - xyzModem_stream_read(buf, BUF_SIZE, &err)) > 0) { - if (addr == 0) { - ret = spl_parse_image_header((struct image_header *)buf); - if (ret) - return ret; - } - store_addr = addr + spl_image.load_addr; + while ((res = xyzModem_stream_read(buf, BUF_SIZE, &err)) > 0) + size += res; + } else { + spl_parse_image_header((struct image_header *)buf); + ret = spl_parse_image_header((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; - memcpy((char *)(store_addr), buf, res); } - } else { - printf("spl: ymodem err - %s\n", xyzModem_error(err)); - return ret; }
+end_stream: xyzModem_stream_close(&err); xyzModem_stream_terminate(false, &getcymodem);