u-boot/common/cmd_usb_mass_storage.c
Przemyslaw Marczak 351e9b2069 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 <p.marczak@samsung.com>
Cc: Marek Vasut <marex@denx.de>
2013-11-08 20:46:19 +01:00

70 lines
1.4 KiB
C

/*
* Copyright (C) 2011 Samsung Electronics
* Lukasz Majewski <l.majewski@samsung.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <errno.h>
#include <common.h>
#include <command.h>
#include <g_dnl.h>
#include <usb.h>
#include <usb_mass_storage.h>
int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
if (argc < 3)
return CMD_RET_USAGE;
const char *usb_controller = argv[1];
const char *mmc_devstring = argv[2];
unsigned int dev_num = simple_strtoul(mmc_devstring, NULL, 0);
struct ums *ums = ums_init(dev_num);
if (!ums)
return CMD_RET_FAILURE;
unsigned int controller_index = (unsigned int)(simple_strtoul(
usb_controller, NULL, 0));
if (board_usb_init(controller_index, USB_INIT_DEVICE)) {
error("Couldn't init USB controller.");
return CMD_RET_FAILURE;
}
int rc = fsg_init(ums);
if (rc) {
error("fsg_init failed");
return CMD_RET_FAILURE;
}
g_dnl_register("ums");
while (1) {
usb_gadget_handle_interrupts();
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();
return CMD_RET_SUCCESS;
}
U_BOOT_CMD(ums, CONFIG_SYS_MAXARGS, 1, do_usb_mass_storage,
"Use the UMS [User Mass Storage]",
"ums <USB_controller> <mmc_dev> e.g. ums 0 0"
);