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drivers
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mtd
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spi
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spi_flash_internal.h

spi_flash_internal.h 2.6 KB
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  1. /*
    2. 

  2.  * SPI flash internal definitions
    3. 

  3.  *
    4. 

  4.  * Copyright (C) 2008 Atmel Corporation
    5. 

  5.  */
    6. 

  6. 

  7. /* Common parameters -- kind of high, but they should only occur when there
    8. 

  8.  * is a problem (and well your system already is broken), so err on the side
    9. 

  9.  * of caution in case we're dealing with slower SPI buses and/or processors.
    10. 

  10.  */
    11. 

  11. #define SPI_FLASH_PROG_TIMEOUT		(2 * CONFIG_SYS_HZ)
    12. 

  12. #define SPI_FLASH_PAGE_ERASE_TIMEOUT	(5 * CONFIG_SYS_HZ)
    13. 

  13. #define SPI_FLASH_SECTOR_ERASE_TIMEOUT	(10 * CONFIG_SYS_HZ)
    14. 

  14. 

  15. /* Common commands */
    16. 

  16. #define CMD_READ_ID			0x9f
    17. 

  17. 

  18. #define CMD_READ_ARRAY_SLOW		0x03
    19. 

  19. #define CMD_READ_ARRAY_FAST		0x0b
    20. 

  20. #define CMD_READ_ARRAY_LEGACY		0xe8
    21. 

  21. 

  22. #define CMD_READ_STATUS			0x05
    23. 

  23. 

  24. /* Common status */
    25. 

  25. #define STATUS_WIP			0x01
    26. 

  26. 

  27. /* Send a single-byte command to the device and read the response */
    28. 

  28. int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len);
    29. 

  29. 

  30. /*
    31. 

  31.  * Send a multi-byte command to the device and read the response. Used
    32. 

  32.  * for flash array reads, etc.
    33. 

  33.  */
    34. 

  34. int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
    35. 

  35. 		size_t cmd_len, void *data, size_t data_len);
    36. 

  36. 

  37. /*
    38. 

  38.  * Send a multi-byte command to the device followed by (optional)
    39. 

  39.  * data. Used for programming the flash array, etc.
    40. 

  40.  */
    41. 

  41. int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
    42. 

  42. 		const void *data, size_t data_len);
    43. 

  43. 

  44. /*
    45. 

  45.  * Same as spi_flash_cmd_read() except it also claims/releases the SPI
    46. 

  46.  * bus. Used as common part of the ->read() operation.
    47. 

  47.  */
    48. 

  48. int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
    49. 

  49. 		size_t cmd_len, void *data, size_t data_len);
    50. 

  50. 

  51. /* Send a command to the device and wait for some bit to clear itself. */
    52. 

  52. int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout,
    53. 

  53. 			   u8 cmd, u8 poll_bit);
    54. 

  54. 

  55. /*
    56. 

  56.  * Send the read status command to the device and wait for the wip
    57. 

  57.  * (write-in-progress) bit to clear itself.
    58. 

  58.  */
    59. 

  59. int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout);
    60. 

  60. 

  61. /* Manufacturer-specific probe functions */
    62. 

  62. struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode);
    63. 

  63. struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode);
    64. 

  64. struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode);
    65. 

  65. struct spi_flash *spi_flash_probe_macronix(struct spi_slave *spi, u8 *idcode);
    66. 

  66. struct spi_flash *spi_flash_probe_sst(struct spi_slave *spi, u8 *idcode);
    67. 

  67. struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 *idcode);
    68. 

  68. struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode);
    69. 

  69. struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi, u8 *idcode);
    70.