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usb:gadget: USB Mass Storage Gadget support

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This patch adds the USB Mass Storage Gadget to u-boot
New command called "ums" is implemented to provide access
to on-device embedded persistent memory.

USB Mass Storage is supposed to work on top of the USB
Gadget framework

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
CC: Marek Vasut <marek.vasut@gmail.com>
This commit is contained in:
Lukasz Majewski
2013-03-05 12:10:17 +01:00
committed by Marek Vasut
parent b4d36f6809
commit b528f71394
4 changed files with 148 additions and 0 deletions
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86
common/cmd_usb_mass_storage.c Normal file
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/*
* Copyright (C) 2011 Samsung Electronics
* Lukasz Majewski <l.majewski@samsung.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <errno.h>
#include <common.h>
#include <command.h>
#include <g_dnl.h>
#include <usb_mass_storage.h>
int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
char *ep;
unsigned int dev_num = 0, offset = 0, part_size = 0;
int rc;
struct ums_board_info *ums_info;
static char *s = "ums";
if (argc < 2) {
printf("usage: ums <dev> - e.g. ums 0\n");
return 0;
}
dev_num = (int)simple_strtoul(argv[1], &ep, 16);
if (dev_num) {
puts("\nSet eMMC device to 0! - e.g. ums 0\n");
goto fail;
}
board_usb_init();
ums_info = board_ums_init(dev_num, offset, part_size);
if (!ums_info) {
printf("MMC: %d -> NOT available\n", dev_num);
goto fail;
}
rc = fsg_init(ums_info);
if (rc) {
printf("cmd ums: fsg_init failed\n");
goto fail;
}
g_dnl_register(s);
while (1) {
/* Handle control-c and timeouts */
if (ctrlc()) {
printf("The remote end did not respond in time.\n");
goto exit;
}
usb_gadget_handle_interrupts();
/* Check if USB cable has been detached */
if (fsg_main_thread(NULL) == EIO)
goto exit;
}
exit:
g_dnl_unregister();
return 0;
fail:
return -1;
}
U_BOOT_CMD(ums, CONFIG_SYS_MAXARGS, 1, do_usb_mass_storage,
"Use the UMS [User Mass Storage]",
"ums - User Mass Storage Gadget"
);