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cmd/usb_mass_storage.c
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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 <errno.h> #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 = NULL; 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; int ret = -1; 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) break; partnum = blk_get_device_part_str(devtype, devnum_part_str, &block_dev, &info, 1); if (partnum < 0) goto cleanup; /* 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)); if (!ums_new) 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); if (!name) 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 ", 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++; } if (ums_count) ret = 0; cleanup: free(s); if (ret < 0) ums_fini(); return ret; } static 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; usb_controller = argv[1]; 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)) { pr_err("Couldn't init USB controller."); rc = CMD_RET_FAILURE; goto cleanup_ums_init; } rc = fsg_init(ums, ums_count, controller_index); if (rc) { pr_err("fsg_init failed"); rc = CMD_RET_FAILURE; goto cleanup_board; } rc = g_dnl_register("usb_dnl_ums"); if (rc) { pr_err("g_dnl_register failed"); rc = CMD_RET_FAILURE; goto cleanup_board; } /* 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. "); while (!g_dnl_board_usb_cable_connected()) { if (ctrlc()) { puts("\rCTRL+C - Operation aborted. "); rc = CMD_RET_SUCCESS; goto cleanup_register; } if (!cable_ready_timeout) { puts("\rUSB cable not detected. " \ "Command exit. "); rc = CMD_RET_SUCCESS; goto cleanup_register; } printf("\rAuto exit in: %.2d s.", cable_ready_timeout); mdelay(1000); cable_ready_timeout--; } puts("\r "); } while (1) { 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 "); /* Check CTRL+C */ if (rc == -EPIPE) printf("\rCTRL+C - Operation aborted "); 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 " " devtype defaults to mmc" ); |