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authorLokesh Vutla <lokeshvutla@ti.com>2016-05-24 10:34:44 +0530
committerTom Rini <trini@konsulko.com>2016-05-27 15:47:42 -0400
commitfa715193c083bbde4985c4ff1e49e288ec29763a (patch)
treea042dae811e192b6ba3111d8e84f17c2c9d9ca04 /common/spl
parentcfe32a4be24da8cf51bbbfa57ddd7cbddade2f43 (diff)
spl: Add an option to load a FIT containing U-Boot from UART
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>
Diffstat (limited to 'common/spl')
-rw-r--r--common/spl/spl_ymodem.c98
1 files changed, 84 insertions, 14 deletions
diff --git a/common/spl/spl_ymodem.c b/common/spl/spl_ymodem.c
index 4f26ea5d21..5402301c78 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);