sf-uclass.c 2.3 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (c) 2014 Google, Inc
  4. */
  5. #include <common.h>
  6. #include <dm.h>
  7. #include <log.h>
  8. #include <malloc.h>
  9. #include <spi.h>
  10. #include <spi_flash.h>
  11. #include <dm/device-internal.h>
  12. #include "sf_internal.h"
  13. DECLARE_GLOBAL_DATA_PTR;
  14. int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf)
  15. {
  16. return log_ret(sf_get_ops(dev)->read(dev, offset, len, buf));
  17. }
  18. int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
  19. const void *buf)
  20. {
  21. return log_ret(sf_get_ops(dev)->write(dev, offset, len, buf));
  22. }
  23. int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len)
  24. {
  25. return log_ret(sf_get_ops(dev)->erase(dev, offset, len));
  26. }
  27. /*
  28. * TODO(sjg@chromium.org): This is an old-style function. We should remove
  29. * it when all SPI flash drivers use dm
  30. */
  31. struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
  32. unsigned int max_hz, unsigned int spi_mode)
  33. {
  34. struct udevice *dev;
  35. if (spi_flash_probe_bus_cs(bus, cs, max_hz, spi_mode, &dev))
  36. return NULL;
  37. return dev_get_uclass_priv(dev);
  38. }
  39. void spi_flash_free(struct spi_flash *flash)
  40. {
  41. device_remove(flash->spi->dev, DM_REMOVE_NORMAL);
  42. }
  43. int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
  44. unsigned int max_hz, unsigned int spi_mode,
  45. struct udevice **devp)
  46. {
  47. struct spi_slave *slave;
  48. struct udevice *bus;
  49. char *str;
  50. int ret;
  51. #if defined(CONFIG_SPL_BUILD) && CONFIG_IS_ENABLED(USE_TINY_PRINTF)
  52. str = "spi_flash";
  53. #else
  54. char name[30];
  55. snprintf(name, sizeof(name), "spi_flash@%d:%d", busnum, cs);
  56. str = strdup(name);
  57. #endif
  58. ret = spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode,
  59. "spi_flash_std", str, &bus, &slave);
  60. if (ret)
  61. return ret;
  62. *devp = slave->dev;
  63. return 0;
  64. }
  65. static int spi_flash_post_bind(struct udevice *dev)
  66. {
  67. #if defined(CONFIG_NEEDS_MANUAL_RELOC)
  68. struct dm_spi_flash_ops *ops = sf_get_ops(dev);
  69. static int reloc_done;
  70. if (!reloc_done) {
  71. if (ops->read)
  72. ops->read += gd->reloc_off;
  73. if (ops->write)
  74. ops->write += gd->reloc_off;
  75. if (ops->erase)
  76. ops->erase += gd->reloc_off;
  77. reloc_done++;
  78. }
  79. #endif
  80. return 0;
  81. }
  82. UCLASS_DRIVER(spi_flash) = {
  83. .id = UCLASS_SPI_FLASH,
  84. .name = "spi_flash",
  85. .post_bind = spi_flash_post_bind,
  86. .per_device_auto_alloc_size = sizeof(struct spi_flash),
  87. };