u-boot/common/cmd_usb_mass_storage.c
Stephen Warren 8c6004568f ums: allow the user to specify the device type
Allow an optional devtype parameter to the ums command, which specifies
the type of the device to be exported. This could allow exporting a SATA
or even another USB device.

Cc: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
2014-05-08 10:38:29 +02:00

164 lines
3.5 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 <part.h>
#include <usb.h>
#include <usb_mass_storage.h>
static int ums_read_sector(struct ums *ums_dev,
ulong start, lbaint_t blkcnt, void *buf)
{
block_dev_desc_t *block_dev = ums_dev->block_dev;
lbaint_t blkstart = start + ums_dev->start_sector;
int dev_num = block_dev->dev;
return block_dev->block_read(dev_num, blkstart, blkcnt, buf);
}
static int ums_write_sector(struct ums *ums_dev,
ulong start, lbaint_t blkcnt, const void *buf)
{
block_dev_desc_t *block_dev = ums_dev->block_dev;
lbaint_t blkstart = start + ums_dev->start_sector;
int dev_num = block_dev->dev;
return block_dev->block_write(dev_num, blkstart, blkcnt, buf);
}
static struct ums ums_dev = {
.read_sector = ums_read_sector,
.write_sector = ums_write_sector,
.name = "UMS disk",
};
struct ums *ums_init(const char *devtype, const char *devnum)
{
block_dev_desc_t *block_dev;
int ret;
ret = get_device(devtype, devnum, &block_dev);
if (ret < 0)
return NULL;
/* f_mass_storage.c assumes SECTOR_SIZE sectors */
if (block_dev->blksz != SECTOR_SIZE)
return NULL;
ums_dev.block_dev = block_dev;
ums_dev.start_sector = 0;
ums_dev.num_sectors = block_dev->lba;
printf("UMS: disk start sector: %#x, count: %#x\n",
ums_dev.start_sector, ums_dev.num_sectors);
return &ums_dev;
}
int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
const char *usb_controller;
const char *devtype;
const char *devnum;
struct ums *ums;
unsigned int controller_index;
int rc;
int cable_ready_timeout __maybe_unused;
if (argc < 3)
return CMD_RET_USAGE;
usb_controller = argv[1];
if (argc >= 4) {
devtype = argv[2];
devnum = argv[3];
} else {
devtype = "mmc";
devnum = argv[2];
}
ums = ums_init(devtype, devnum);
if (!ums)
return CMD_RET_FAILURE;
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;
}
rc = fsg_init(ums);
if (rc) {
error("fsg_init failed");
return CMD_RET_FAILURE;
}
rc = g_dnl_register("usb_dnl_ums");
if (rc) {
error("g_dnl_register failed");
return CMD_RET_FAILURE;
}
/* Timeout unit: seconds */
cable_ready_timeout = UMS_CABLE_READY_TIMEOUT;
if (!g_dnl_board_usb_cable_connected()) {
/*
* Won't execute if we don't know whether the cable is
* connected.
*/
puts("Please connect USB cable.\n");
while (!g_dnl_board_usb_cable_connected()) {
if (ctrlc()) {
puts("\rCTRL+C - Operation aborted.\n");
goto exit;
}
if (!cable_ready_timeout) {
puts("\rUSB cable not detected.\n" \
"Command exit.\n");
goto exit;
}
printf("\rAuto exit in: %.2d s.", cable_ready_timeout);
mdelay(1000);
cable_ready_timeout--;
}
puts("\r\n");
}
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, 4, 1, do_usb_mass_storage,
"Use the UMS [User Mass Storage]",
"ums <USB_controller> [<devtype>] <devnum> e.g. ums 0 mmc 0\n"
" devtype defaults to mmc"
);