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  • /*
     * Copyright (C) 2011 Samsung Electronics
     * Lukasz Majewski <l.majewski@samsung.com>
     *
    
     * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
     *
    
     * SPDX-License-Identifier:	GPL-2.0+
    
    #include <common.h>
    #include <command.h>
    
    #include <console.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)
    {
    
    	struct blk_desc *block_dev = &ums_dev->block_dev;
    
    	lbaint_t blkstart = start + ums_dev->start_sector;
    
    
    	return blk_dread(block_dev, blkstart, blkcnt, buf);
    
    }
    
    static int ums_write_sector(struct ums *ums_dev,
    			    ulong start, lbaint_t blkcnt, const void *buf)
    {
    
    	struct blk_desc *block_dev = &ums_dev->block_dev;
    
    	lbaint_t blkstart = start + ums_dev->start_sector;
    
    
    	return blk_dwrite(block_dev, blkstart, blkcnt, buf);
    
    static struct ums *ums;
    static int ums_count;
    
    static void ums_fini(void)
    {
    	int i;
    
    	for (i = 0; i < ums_count; i++)
    		free((void *)ums[i].name);
    	free(ums);
    	ums = 0;
    	ums_count = 0;
    }
    
    #define UMS_NAME_LEN 16
    
    static int ums_init(const char *devtype, const char *devnums_part_str)
    
    	char *s, *t, *devnum_part_str, *name;
    
    	struct blk_desc *block_dev;
    
    	disk_partition_t info;
    	int partnum;
    
    	struct ums *ums_new;
    
    	s = strdup(devnums_part_str);
    
    	if (!s)
    		return -1;
    
    	t = s;
    	ums_count = 0;
    
    	for (;;) {
    
    		devnum_part_str = strsep(&t, ",");
    		if (!devnum_part_str)
    
    		partnum = blk_get_device_part_str(devtype, devnum_part_str,
    					&block_dev, &info, 1);
    
    		if (partnum < 0)
    
    		/* Check if the argument is in legacy format. If yes,
    		 * expose all partitions by setting the partnum = 0
    		 * e.g. ums 0 mmc 0
    		 */
    		if (!strchr(devnum_part_str, ':'))
    			partnum = 0;
    
    
    		/* f_mass_storage.c assumes SECTOR_SIZE sectors */
    
    		if (block_dev->blksz != SECTOR_SIZE)
    
    			goto cleanup;
    
    		ums_new = realloc(ums, (ums_count + 1) * sizeof(*ums));
    
    			goto cleanup;
    		ums = ums_new;
    
    
    		/* if partnum = 0, expose all partitions */
    		if (partnum == 0) {
    			ums[ums_count].start_sector = 0;
    			ums[ums_count].num_sectors = block_dev->lba;
    		} else {
    			ums[ums_count].start_sector = info.start;
    			ums[ums_count].num_sectors = info.size;
    		}
    
    
    		ums[ums_count].read_sector = ums_read_sector;
    		ums[ums_count].write_sector = ums_write_sector;
    
    		name = malloc(UMS_NAME_LEN);
    
    			goto cleanup;
    		snprintf(name, UMS_NAME_LEN, "UMS disk %d", ums_count);
    		ums[ums_count].name = name;
    		ums[ums_count].block_dev = *block_dev;
    
    		printf("UMS: LUN %d, dev %d, hwpart %d, sector %#x, count %#x\n",
    
    		       ums_count, ums[ums_count].block_dev.devnum,
    
    		       ums[ums_count].block_dev.hwpart,
    		       ums[ums_count].start_sector,
    		       ums[ums_count].num_sectors);
    
    		ums_count++;
    	}
    
    
    cleanup:
    	free(s);
    
    	if (ret < 0)
    		ums_fini();
    
    	return ret;
    
    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;
    	unsigned int controller_index;
    	int rc;
    	int cable_ready_timeout __maybe_unused;
    
    
    	if (argc < 3)
    		return CMD_RET_USAGE;
    
    	if (argc >= 4) {
    		devtype = argv[2];
    		devnum  = argv[3];
    	} else {
    		devtype = "mmc";
    		devnum  = argv[2];
    	}
    
    	rc = ums_init(devtype, devnum);
    	if (rc < 0)
    
    		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.");
    
    		rc = CMD_RET_FAILURE;
    		goto cleanup_ums_init;
    
    	rc = fsg_init(ums, ums_count);
    
    		error("fsg_init failed");
    
    		rc = CMD_RET_FAILURE;
    		goto cleanup_board;
    
    	rc = g_dnl_register("usb_dnl_ums");
    	if (rc) {
    		error("g_dnl_register failed");
    
    		rc = CMD_RET_FAILURE;
    		goto cleanup_board;
    
    	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");
    
    				rc = CMD_RET_SUCCESS;
    				goto cleanup_register;
    
    			}
    			if (!cable_ready_timeout) {
    				puts("\rUSB cable not detected.\n" \
    				     "Command exit.\n");
    
    				rc = CMD_RET_SUCCESS;
    				goto cleanup_register;
    
    			}
    
    			printf("\rAuto exit in: %.2d s.", cable_ready_timeout);
    			mdelay(1000);
    			cable_ready_timeout--;
    		}
    		puts("\r\n");
    	}
    
    
    		usb_gadget_handle_interrupts(controller_index);
    
    
    		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");
    
    
    			rc = CMD_RET_SUCCESS;
    			goto cleanup_register;
    
    
    cleanup_register:
    
    	g_dnl_unregister();
    
    cleanup_board:
    
    	board_usb_cleanup(controller_index, USB_INIT_DEVICE);
    
    cleanup_ums_init:
    	ums_fini();
    
    	return rc;
    
    U_BOOT_CMD(ums, 4, 1, do_usb_mass_storage,
    
    	"Use the UMS [USB Mass Storage]",
    
    	"<USB_controller> [<devtype>] <dev[:part]>  e.g. ums 0 mmc 0\n"
    
    	"    devtype defaults to mmc"