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