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