usb_mass_storage.c 5.2 KB

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