dfu_ram.c 2.0 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * (C) Copyright 2013
  4. * Afzal Mohammed <afzal.mohd.ma@gmail.com>
  5. *
  6. * Reference: dfu_mmc.c
  7. * Copyright (C) 2012 Samsung Electronics
  8. * author: Lukasz Majewski <l.majewski@samsung.com>
  9. */
  10. #include <common.h>
  11. #include <malloc.h>
  12. #include <errno.h>
  13. #include <dfu.h>
  14. static int dfu_transfer_medium_ram(enum dfu_op op, struct dfu_entity *dfu,
  15. u64 offset, void *buf, long *len)
  16. {
  17. if (dfu->layout != DFU_RAM_ADDR) {
  18. pr_err("unsupported layout: %s\n", dfu_get_layout(dfu->layout));
  19. return -EINVAL;
  20. }
  21. if (offset > dfu->data.ram.size) {
  22. pr_err("request exceeds allowed area\n");
  23. return -EINVAL;
  24. }
  25. if (op == DFU_OP_WRITE)
  26. memcpy(dfu->data.ram.start + offset, buf, *len);
  27. else
  28. memcpy(buf, dfu->data.ram.start + offset, *len);
  29. return 0;
  30. }
  31. static int dfu_write_medium_ram(struct dfu_entity *dfu, u64 offset,
  32. void *buf, long *len)
  33. {
  34. return dfu_transfer_medium_ram(DFU_OP_WRITE, dfu, offset, buf, len);
  35. }
  36. int dfu_get_medium_size_ram(struct dfu_entity *dfu, u64 *size)
  37. {
  38. *size = dfu->data.ram.size;
  39. return 0;
  40. }
  41. static int dfu_read_medium_ram(struct dfu_entity *dfu, u64 offset,
  42. void *buf, long *len)
  43. {
  44. return dfu_transfer_medium_ram(DFU_OP_READ, dfu, offset, buf, len);
  45. }
  46. int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr, char *s)
  47. {
  48. const char *argv[3];
  49. const char **parg = argv;
  50. for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) {
  51. *parg = strsep(&s, " ");
  52. if (*parg == NULL) {
  53. pr_err("Invalid number of arguments.\n");
  54. return -ENODEV;
  55. }
  56. }
  57. dfu->dev_type = DFU_DEV_RAM;
  58. if (strcmp(argv[0], "ram")) {
  59. pr_err("unsupported device: %s\n", argv[0]);
  60. return -ENODEV;
  61. }
  62. dfu->layout = DFU_RAM_ADDR;
  63. dfu->data.ram.start = (void *)simple_strtoul(argv[1], NULL, 16);
  64. dfu->data.ram.size = simple_strtoul(argv[2], NULL, 16);
  65. dfu->write_medium = dfu_write_medium_ram;
  66. dfu->get_medium_size = dfu_get_medium_size_ram;
  67. dfu->read_medium = dfu_read_medium_ram;
  68. dfu->inited = 0;
  69. return 0;
  70. }