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 <mapmem.h>
  13. #include <errno.h>
  14. #include <dfu.h>
  15. static int dfu_transfer_medium_ram(enum dfu_op op, struct dfu_entity *dfu,
  16. u64 offset, void *buf, long *len)
  17. {
  18. if (dfu->layout != DFU_RAM_ADDR) {
  19. pr_err("unsupported layout: %s\n", dfu_get_layout(dfu->layout));
  20. return -EINVAL;
  21. }
  22. if (offset > dfu->data.ram.size) {
  23. pr_err("request exceeds allowed area\n");
  24. return -EINVAL;
  25. }
  26. if (op == DFU_OP_WRITE)
  27. memcpy(map_sysmem(dfu->data.ram.start + offset, 0), buf, *len);
  28. else
  29. memcpy(buf, map_sysmem(dfu->data.ram.start + offset, 0), *len);
  30. return 0;
  31. }
  32. static int dfu_write_medium_ram(struct dfu_entity *dfu, u64 offset,
  33. void *buf, long *len)
  34. {
  35. return dfu_transfer_medium_ram(DFU_OP_WRITE, dfu, offset, buf, len);
  36. }
  37. int dfu_get_medium_size_ram(struct dfu_entity *dfu, u64 *size)
  38. {
  39. *size = dfu->data.ram.size;
  40. return 0;
  41. }
  42. static int dfu_read_medium_ram(struct dfu_entity *dfu, u64 offset,
  43. void *buf, long *len)
  44. {
  45. return dfu_transfer_medium_ram(DFU_OP_READ, dfu, offset, buf, len);
  46. }
  47. int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr, char *s)
  48. {
  49. const char *argv[3];
  50. const char **parg = argv;
  51. for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) {
  52. *parg = strsep(&s, " ");
  53. if (*parg == NULL) {
  54. pr_err("Invalid number of arguments.\n");
  55. return -ENODEV;
  56. }
  57. }
  58. dfu->dev_type = DFU_DEV_RAM;
  59. if (strcmp(argv[0], "ram")) {
  60. pr_err("unsupported device: %s\n", argv[0]);
  61. return -ENODEV;
  62. }
  63. dfu->layout = DFU_RAM_ADDR;
  64. dfu->data.ram.start = simple_strtoul(argv[1], NULL, 16);
  65. dfu->data.ram.size = simple_strtoul(argv[2], NULL, 16);
  66. dfu->write_medium = dfu_write_medium_ram;
  67. dfu->get_medium_size = dfu_get_medium_size_ram;
  68. dfu->read_medium = dfu_read_medium_ram;
  69. dfu->inited = 0;
  70. return 0;
  71. }