sunxi: Create helper function veryfing valid boot signature on MMC
This patch extracts checking for valid SD card "eGON.BT0" signature from
`board_mmc_init` into function `sunxi_mmc_has_egon_boot_signature`.
Buffer for mmc sector is allocated and freed at runtime. `panic` is
triggered on malloc failure.
Signed-off-by: Daniel Kochmański <dkochmanski@turtle-solutions.eu>
CC: Roy Spliet <r.spliet@ultimaker.com>
Cc: Ian Campbell <ijc@hellion.org.uk>
[hdegoede@redhat.com: Small bugfix to make it work for devs other then mmc0]
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c
index e7ab828..f9b9493 100644
--- a/drivers/mmc/sunxi_mmc.c
+++ b/drivers/mmc/sunxi_mmc.c
@@ -433,6 +433,23 @@
return !gpio_get_value(cd_pin);
}
+int sunxi_mmc_has_egon_boot_signature(struct mmc *mmc)
+{
+ char *buf = malloc(512);
+ int valid_signature = 0;
+
+ if (buf == NULL)
+ panic("Failed to allocate memory\n");
+
+ if (mmc_getcd(mmc) && mmc_init(mmc) == 0 &&
+ mmc->block_dev.block_read(mmc->block_dev.dev, 16, 1, buf) == 1 &&
+ strncmp(&buf[4], "eGON.BT0", 8) == 0)
+ valid_signature = 1;
+
+ free(buf);
+ return valid_signature;
+}
+
static const struct mmc_ops sunxi_mmc_ops = {
.send_cmd = sunxi_mmc_send_cmd,
.set_ios = sunxi_mmc_set_ios,