ARM: tegra: add eMMC barebox update handler

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 103 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index e68156a772..7c4c1fd137 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -13,3 +13,4 @@ lwl-y += tegra_maincomplex_init.o
 obj-y += tegra20.o
 obj-y += tegra20-pmc.o
 obj-y += tegra20-timer.o
+obj-$(CONFIG_BAREBOX_UPDATE) += tegra-bbu.o
diff --git a/arch/arm/mach-tegra/include/mach/tegra-bbu.h b/arch/arm/mach-tegra/include/mach/tegra-bbu.h
new file mode 100644
index 0000000000..32e2861ac6
--- /dev/null
+++ b/arch/arm/mach-tegra/include/mach/tegra-bbu.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2015 Lucas Stach <l.stach@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <bbu.h>
+
+#ifdef CONFIG_BAREBOX_UPDATE
+int tegra_bbu_register_emmc_handler(const char *name, char *devicefile,
+				    unsigned long flags);
+#else
+static int tegra_bbu_register_emmc_handler(const char *name, char *devicefile,
+				    unsigned long flags)
+{
+	return 0;
+};
+#endif
diff --git a/arch/arm/mach-tegra/tegra-bbu.c b/arch/arm/mach-tegra/tegra-bbu.c
new file mode 100644
index 0000000000..089e6c736a
--- /dev/null
+++ b/arch/arm/mach-tegra/tegra-bbu.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2015 Lucas Stach <l.stach@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <common.h>
+#include <fcntl.h>
+#include <fs.h>
+#include <mach/tegra-bbu.h>
+#include <malloc.h>
+
+static int tegra_bbu_emmc_handler(struct bbu_handler *handler,
+				  struct bbu_data *data)
+{
+
+	int fd, ret;
+
+	if (file_detect_type(data->image + 0x4000, data->len) !=
+	    filetype_arm_barebox &&
+	    !bbu_force(data, "Not an ARM barebox image"))
+		return -EINVAL;
+
+	ret = bbu_confirm(data);
+	if (ret)
+		return ret;
+
+	fd = open(data->devicefile, O_WRONLY);
+	if (fd < 0)
+		return fd;
+
+	ret = write(fd, data->image, data->len);
+	if (ret < 0) {
+		pr_err("writing update to %s failed with %s\n",
+			data->devicefile, strerror(-ret));
+		goto err_close;
+	}
+
+	ret = 0;
+
+err_close:
+	close(fd);
+
+	return ret;
+}
+
+int tegra_bbu_register_emmc_handler(const char *name, char *devicefile,
+				    unsigned long flags)
+{
+	struct bbu_handler *handler;
+	int ret = 0;
+
+	handler = xzalloc(sizeof(*handler));
+	handler->name = name;
+	handler->devicefile = devicefile;
+	handler->flags = flags;
+	handler->handler = tegra_bbu_emmc_handler;
+
+	ret = bbu_register_handler(handler);
+	if (ret)
+		free(handler);
+
+	return ret;
+}