[U-Boot] [RFC PATCH v1 2/6] spl: dfu: adding dfu support functions for SPL-DFU

[Ravi Babu]

Adding support functions to run dfu commands

Signed-off-by: Ravi Babu <ravibabu at ti.com>
---
 common/spl/Makefile  |    1 +
 common/spl/spl_dfu.c |  153 ++++++++++++++++++++++++++++++++++++++++++++++++++
 include/spl.h        |   10 ++++
 3 files changed, 164 insertions(+)
 create mode 100644 common/spl/spl_dfu.c

diff --git a/common/spl/Makefile b/common/spl/Makefile
index 2e0f695..7a34697 100644
--- a/common/spl/Makefile
+++ b/common/spl/Makefile
@@ -21,4 +21,5 @@ obj-$(CONFIG_SPL_USB_SUPPORT) += spl_usb.o
 obj-$(CONFIG_SPL_FAT_SUPPORT) += spl_fat.o
 obj-$(CONFIG_SPL_EXT_SUPPORT) += spl_ext.o
 obj-$(CONFIG_SPL_SATA_SUPPORT) += spl_sata.o
+obj-$(CONFIG_SPL_DFU) += spl_dfu.o
 endif
diff --git a/common/spl/spl_dfu.c b/common/spl/spl_dfu.c
new file mode 100644
index 0000000..8b8432b
--- /dev/null
+++ b/common/spl/spl_dfu.c
@@ -0,0 +1,153 @@
+/*
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ *
+ * Ravi B <ravibabu at ti.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <common.h>
+#include <dm.h>
+#include <spl.h>
+#include <linux/compiler.h>
+#include <errno.h>
+#include <asm/u-boot.h>
+#include <errno.h>
+#include <mmc.h>
+#include <watchdog.h>
+#include <console.h>
+#include <g_dnl.h>
+#include <usb.h>
+#include <dfu.h>
+#include <environment.h>
+
+static int run_dfu(int usb_index, char *interface, char *devstring)
+{
+	int ret;
+
+	ret = dfu_init_env_entities(interface, devstring);
+	if (ret)
+		goto done;
+
+	ret = CMD_RET_SUCCESS;
+
+	board_usb_init(usb_index, USB_INIT_DEVICE);
+	g_dnl_clear_detach();
+	g_dnl_register("usb_dnl_dfu");
+
+	while (1) {
+		if (ctrlc())
+			goto exit;
+
+		if (dfu_get_defer_flush()) {
+			/*
+			 * Call to usb_gadget_handle_interrupts() is necessary
+			 * to act on ZLP OUT transaction from HOST PC after
+			 * transmitting the whole file.
+			 *
+			 * If this ZLP OUT packet is NAK'ed, the HOST libusb
+			 * function fails after timeout (by default it is set to
+			 * 5 seconds). In such situation the dfu-util program
+			 * exits with error message.
+			 */
+			usb_gadget_handle_interrupts(usb_index);
+			ret = dfu_flush(dfu_get_defer_flush(), NULL, 0, 0);
+			dfu_set_defer_flush(NULL);
+			if (ret) {
+				error("Deferred dfu_flush() failed!");
+				goto exit;
+			}
+		}
+
+		WATCHDOG_RESET();
+		usb_gadget_handle_interrupts(usb_index);
+	}
+exit:
+	g_dnl_unregister();
+	board_usb_cleanup(usb_index, USB_INIT_DEVICE);
+done:
+	dfu_free_entities();
+	g_dnl_clear_detach();
+
+	return ret;
+}
+
+int spl_dfu_cmd(int usbctrl, char *dfu_alt_info, char *interface, char *devstr)
+{
+	char *str_env;
+	int ret;
+
+	/* set default environment */
+	set_default_env(0);
+	str_env = getenv(dfu_alt_info);
+	if (!str_env) {
+		error("\"dfu_alt_info\" env variable not defined!\n");
+		return -EINVAL;
+	}
+
+	ret = setenv("dfu_alt_info", str_env);
+	if (ret) {
+		error("unable to set env variable \"dfu_alt_info\"!\n");
+		return -EINVAL;
+	}
+
+	/* invoke dfu command */
+	return run_dfu(usbctrl, interface, devstr);
+}
+
+int spl_dfu_mmc(int usb_index, int mmc_dev, char *dfu_alt_info)
+{
+	struct mmc *mmcdev;
+	struct mmc **mmc = &mmcdev;
+	int device = mmc_dev;
+	int ret;
+
+	/* initialize the mmc module */
+	mmc_initialize(0);
+
+	*mmc = find_mmc_device(device);
+	if (!*mmc) {
+		error("failed to find mmc device %d\n", device);
+		return -ENODEV;
+	}
+
+	ret = mmc_init(*mmc);
+	if (ret) {
+		error("spl: mmc init failed with error: %d\n", ret);
+		return ret;
+	}
+
+	return spl_dfu_cmd(usb_index, dfu_alt_info, "mmc", mmc_dev ? "1" : "0");
+}
+
+ulong spl_fit_ram_read(struct spl_load_info *load, ulong sector, ulong count,
+			  void *buf)
+{
+	memcpy(buf, (void *)sector, count);
+	return count;
+}
+
+int spl_dfu_ram_load_image(void)
+{
+	int err = 0;
+	struct image_header *header;
+	unsigned int addr = 0x80200000;
+	char *filename = (char *)addr;
+
+	header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
+						sizeof(struct image_header));
+
+	memcpy(header, filename, sizeof(struct image_header));
+
+	if (IS_ENABLED(CONFIG_SPL_LOAD_FIT)) {
+		struct spl_load_info load;
+		debug("Found FIT\n");
+		load.priv = NULL;
+		load.read = spl_fit_ram_read;
+
+		err = spl_load_simple_fit(&load, (ulong)filename, header);
+	} else {
+		spl_parse_image_header(header);
+	}
+	return err;
+}
diff --git a/include/spl.h b/include/spl.h
index af02a6d..8849678 100644
--- a/include/spl.h
+++ b/include/spl.h
@@ -139,4 +139,14 @@ void spl_board_init(void);
  */
 bool spl_was_boot_source(void);
 
+/* spl dfu functions */
+/* spl_dfu_mmc - run dfu command with chosen mmc device interface
+ * @param usb_index - usb controller number
+ * @param mmc_dev -  mmc device nubmer
+ *
+ * @return 0 on success, otherwise error code
+ */
+int spl_dfu_mmc(int usb_index, int mmc_dev, char *dfu_alt_info);
+int spl_dfu_cmd(int usbctrl, char *dfu_alt_info, char *interface, char *devstr);
+int spl_dfu_ram_load_image(void);
 #endif
-- 
1.7.9.5