From 645c48f50eab307a9879a82c4d066e74114ec78a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Kochma=C5=84ski?= Date: Fri, 29 May 2015 16:55:41 +0200 Subject: sunxi: Create helper function veryfing valid boot signature on MMC MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 CC: Roy Spliet Cc: Ian Campbell [hdegoede@redhat.com: Small bugfix to make it work for devs other then mmc0] Acked-by: Hans de Goede Signed-off-by: Hans de Goede --- drivers/mmc/sunxi_mmc.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'drivers/mmc') 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 @@ static int sunxi_mmc_getcd(struct mmc *mmc) 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, -- cgit v1.1