1 /* 2 * Copyright (C) 2011 Samsung Electronics 3 * Lukasz Majewski <l.majewski@samsung.com> 4 * 5 * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved. 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <errno.h> 11 #include <common.h> 12 #include <command.h> 13 #include <console.h> 14 #include <g_dnl.h> 15 #include <part.h> 16 #include <usb.h> 17 #include <usb_mass_storage.h> 18 19 static int ums_read_sector(struct ums *ums_dev, 20 ulong start, lbaint_t blkcnt, void *buf) 21 { 22 struct blk_desc *block_dev = &ums_dev->block_dev; 23 lbaint_t blkstart = start + ums_dev->start_sector; 24 25 return blk_dread(block_dev, blkstart, blkcnt, buf); 26 } 27 28 static int ums_write_sector(struct ums *ums_dev, 29 ulong start, lbaint_t blkcnt, const void *buf) 30 { 31 struct blk_desc *block_dev = &ums_dev->block_dev; 32 lbaint_t blkstart = start + ums_dev->start_sector; 33 34 return blk_dwrite(block_dev, blkstart, blkcnt, buf); 35 } 36 37 static struct ums *ums; 38 static int ums_count; 39 40 static void ums_fini(void) 41 { 42 int i; 43 44 for (i = 0; i < ums_count; i++) 45 free((void *)ums[i].name); 46 free(ums); 47 ums = NULL; 48 ums_count = 0; 49 } 50 51 #define UMS_NAME_LEN 16 52 53 static int ums_init(const char *devtype, const char *devnums_part_str) 54 { 55 char *s, *t, *devnum_part_str, *name; 56 struct blk_desc *block_dev; 57 disk_partition_t info; 58 int partnum; 59 int ret = -1; 60 struct ums *ums_new; 61 62 s = strdup(devnums_part_str); 63 if (!s) 64 return -1; 65 66 t = s; 67 ums_count = 0; 68 69 for (;;) { 70 devnum_part_str = strsep(&t, ","); 71 if (!devnum_part_str) 72 break; 73 74 partnum = blk_get_device_part_str(devtype, devnum_part_str, 75 &block_dev, &info, 1); 76 77 if (partnum < 0) 78 goto cleanup; 79 80 /* Check if the argument is in legacy format. If yes, 81 * expose all partitions by setting the partnum = 0 82 * e.g. ums 0 mmc 0 83 */ 84 if (!strchr(devnum_part_str, ':')) 85 partnum = 0; 86 87 /* f_mass_storage.c assumes SECTOR_SIZE sectors */ 88 if (block_dev->blksz != SECTOR_SIZE) 89 goto cleanup; 90 91 ums_new = realloc(ums, (ums_count + 1) * sizeof(*ums)); 92 if (!ums_new) 93 goto cleanup; 94 ums = ums_new; 95 96 /* if partnum = 0, expose all partitions */ 97 if (partnum == 0) { 98 ums[ums_count].start_sector = 0; 99 ums[ums_count].num_sectors = block_dev->lba; 100 } else { 101 ums[ums_count].start_sector = info.start; 102 ums[ums_count].num_sectors = info.size; 103 } 104 105 ums[ums_count].read_sector = ums_read_sector; 106 ums[ums_count].write_sector = ums_write_sector; 107 108 name = malloc(UMS_NAME_LEN); 109 if (!name) 110 goto cleanup; 111 snprintf(name, UMS_NAME_LEN, "UMS disk %d", ums_count); 112 ums[ums_count].name = name; 113 ums[ums_count].block_dev = *block_dev; 114 115 printf("UMS: LUN %d, dev %d, hwpart %d, sector %#x, count %#x\n", 116 ums_count, ums[ums_count].block_dev.devnum, 117 ums[ums_count].block_dev.hwpart, 118 ums[ums_count].start_sector, 119 ums[ums_count].num_sectors); 120 121 ums_count++; 122 } 123 124 if (ums_count) 125 ret = 0; 126 127 cleanup: 128 free(s); 129 130 if (ret < 0) 131 ums_fini(); 132 133 return ret; 134 } 135 136 static int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag, 137 int argc, char * const argv[]) 138 { 139 const char *usb_controller; 140 const char *devtype; 141 const char *devnum; 142 unsigned int controller_index; 143 int rc; 144 int cable_ready_timeout __maybe_unused; 145 146 if (argc < 3) 147 return CMD_RET_USAGE; 148 149 usb_controller = argv[1]; 150 if (argc >= 4) { 151 devtype = argv[2]; 152 devnum = argv[3]; 153 } else { 154 devtype = "mmc"; 155 devnum = argv[2]; 156 } 157 158 rc = ums_init(devtype, devnum); 159 if (rc < 0) 160 return CMD_RET_FAILURE; 161 162 controller_index = (unsigned int)(simple_strtoul( 163 usb_controller, NULL, 0)); 164 if (board_usb_init(controller_index, USB_INIT_DEVICE)) { 165 pr_err("Couldn't init USB controller."); 166 rc = CMD_RET_FAILURE; 167 goto cleanup_ums_init; 168 } 169 170 rc = fsg_init(ums, ums_count); 171 if (rc) { 172 pr_err("fsg_init failed"); 173 rc = CMD_RET_FAILURE; 174 goto cleanup_board; 175 } 176 177 rc = g_dnl_register("usb_dnl_ums"); 178 if (rc) { 179 pr_err("g_dnl_register failed"); 180 rc = CMD_RET_FAILURE; 181 goto cleanup_board; 182 } 183 184 /* Timeout unit: seconds */ 185 cable_ready_timeout = UMS_CABLE_READY_TIMEOUT; 186 187 if (!g_dnl_board_usb_cable_connected()) { 188 /* 189 * Won't execute if we don't know whether the cable is 190 * connected. 191 */ 192 puts("Please connect USB cable.\n"); 193 194 while (!g_dnl_board_usb_cable_connected()) { 195 if (ctrlc()) { 196 puts("\rCTRL+C - Operation aborted.\n"); 197 rc = CMD_RET_SUCCESS; 198 goto cleanup_register; 199 } 200 if (!cable_ready_timeout) { 201 puts("\rUSB cable not detected.\n" \ 202 "Command exit.\n"); 203 rc = CMD_RET_SUCCESS; 204 goto cleanup_register; 205 } 206 207 printf("\rAuto exit in: %.2d s.", cable_ready_timeout); 208 mdelay(1000); 209 cable_ready_timeout--; 210 } 211 puts("\r\n"); 212 } 213 214 while (1) { 215 usb_gadget_handle_interrupts(controller_index); 216 217 rc = fsg_main_thread(NULL); 218 if (rc) { 219 /* Check I/O error */ 220 if (rc == -EIO) 221 printf("\rCheck USB cable connection\n"); 222 223 /* Check CTRL+C */ 224 if (rc == -EPIPE) 225 printf("\rCTRL+C - Operation aborted\n"); 226 227 rc = CMD_RET_SUCCESS; 228 goto cleanup_register; 229 } 230 } 231 232 cleanup_register: 233 g_dnl_unregister(); 234 cleanup_board: 235 board_usb_cleanup(controller_index, USB_INIT_DEVICE); 236 cleanup_ums_init: 237 ums_fini(); 238 239 return rc; 240 } 241 242 U_BOOT_CMD(ums, 4, 1, do_usb_mass_storage, 243 "Use the UMS [USB Mass Storage]", 244 "<USB_controller> [<devtype>] <dev[:part]> e.g. ums 0 mmc 0\n" 245 " devtype defaults to mmc" 246 ); 247