From 351e9b206934c2d4a6a0acd1547caf077e4e675c Mon Sep 17 00:00:00 2001
From: Przemyslaw Marczak
Date: Wed, 23 Oct 2013 14:30:46 +0200
Subject: usb: ums: add ums exit feature by ctrl+c or by detach usb cable
This patch allows exiting from UMS mode to u-boot prompt
by detaching usb cable or by pressing ctrl+c.
Add new config: CONFIG_USB_CABLE_CHECK. If defined then board
file should provide function: usb_cable_connected() (include/usb.h)
that return 1 if cable is connected and 0 otherwise.
Changes v2:
- add a note to the README
Signed-off-by: Przemyslaw Marczak
Cc: Marek Vasut
---
common/cmd_usb_mass_storage.c | 21 +++++++++++++--------
1 file changed, 13 insertions(+), 8 deletions(-)
(limited to 'common')
diff --git a/common/cmd_usb_mass_storage.c b/common/cmd_usb_mass_storage.c
index 4d3bbd8..99487f4 100644
--- a/common/cmd_usb_mass_storage.c
+++ b/common/cmd_usb_mass_storage.c
@@ -5,6 +5,7 @@
* SPDX-License-Identifier: GPL-2.0+
*/
+#include
#include
#include
#include
@@ -42,16 +43,20 @@ int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag,
g_dnl_register("ums");
while (1) {
- /* Handle control-c and timeouts */
- if (ctrlc()) {
- error("The remote end did not respond in time.");
- goto exit;
- }
-
usb_gadget_handle_interrupts();
- /* Check if USB cable has been detached */
- if (fsg_main_thread(NULL) == EIO)
+
+ rc = fsg_main_thread(NULL);
+ if (rc) {
+ /* Check I/O error */
+ if (rc == -EIO)
+ printf("\rCheck USB cable connection\n");
+
+ /* Check CTRL+C */
+ if (rc == -EPIPE)
+ printf("\rCTRL+C - Operation aborted\n");
+
goto exit;
+ }
}
exit:
g_dnl_unregister();
--
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