drivers/mtd/spi/spi_flash_internal.h

   1 /*
   2  * SPI flash internal definitions
   3  *
   4  * Copyright (C) 2008 Atmel Corporation
   5  */
   6
   7 /* Common parameters -- kind of high, but they should only occur when there
   8  * is a problem (and well your system already is broken), so err on the side
   9  * of caution in case we're dealing with slower SPI buses and/or processors.
  10  */
  11 #define SPI_FLASH_PROG_TIMEOUT          (2 * CONFIG_SYS_HZ)
  12 #define SPI_FLASH_PAGE_ERASE_TIMEOUT    (5 * CONFIG_SYS_HZ)
  13 #define SPI_FLASH_SECTOR_ERASE_TIMEOUT  (10 * CONFIG_SYS_HZ)
  14
  15 /* Common commands */
  16 #define CMD_READ_ID                     0x9f
  17
  18 #define CMD_READ_ARRAY_SLOW             0x03
  19 #define CMD_READ_ARRAY_FAST             0x0b
  20
  21 #define CMD_WRITE_STATUS                0x01
  22 #define CMD_PAGE_PROGRAM                0x02
  23 #define CMD_WRITE_DISABLE               0x04
  24 #define CMD_READ_STATUS                 0x05
  25 #define CMD_FLAG_STATUS                 0x70
  26 #define CMD_WRITE_ENABLE                0x06
  27 #define CMD_ERASE_4K                    0x20
  28 #define CMD_ERASE_32K                   0x52
  29 #define CMD_ERASE_64K                   0xd8
  30 #define CMD_ERASE_CHIP                  0xc7
  31
  32 #define SPI_FLASH_16MB_BOUN             0x1000000
  33
  34 #ifdef CONFIG_SPI_FLASH_BAR
  35 /* Bank addr access commands */
  36 # define CMD_BANKADDR_BRWR              0x17
  37 # define CMD_BANKADDR_BRRD              0x16
  38 # define CMD_EXTNADDR_WREAR             0xC5
  39 # define CMD_EXTNADDR_RDEAR             0xC8
  40 #endif
  41
  42 /* Common status */
  43 #define STATUS_WIP                      0x01
  44 #define STATUS_PEC                      0x80
  45
  46 /* Send a single-byte command to the device and read the response */
  47 int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len);
  48
  49 /*
  50  * Send a multi-byte command to the device and read the response. Used
  51  * for flash array reads, etc.
  52  */
  53 int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
  54                 size_t cmd_len, void *data, size_t data_len);
  55
  56 int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
  57                 size_t len, void *data);
  58
  59 /*
  60  * Send a multi-byte command to the device followed by (optional)
  61  * data. Used for programming the flash array, etc.
  62  */
  63 int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
  64                 const void *data, size_t data_len);
  65
  66 /*
  67  * Write the requested data out breaking it up into multiple write
  68  * commands as needed per the write size.
  69  */
  70 int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
  71                 size_t len, const void *buf);
  72
  73 #ifdef CONFIG_SPI_FLASH_SST
  74 int sst_write_wp(struct spi_flash *flash, u32 offset, size_t len,
  75                 const void *buf);
  76 #endif
  77
  78 /*
  79  * Enable writing on the SPI flash.
  80  */
  81 static inline int spi_flash_cmd_write_enable(struct spi_flash *flash)
  82 {
  83         return spi_flash_cmd(flash->spi, CMD_WRITE_ENABLE, NULL, 0);
  84 }
  85
  86 /*
  87  * Disable writing on the SPI flash.
  88  */
  89 static inline int spi_flash_cmd_write_disable(struct spi_flash *flash)
  90 {
  91         return spi_flash_cmd(flash->spi, CMD_WRITE_DISABLE, NULL, 0);
  92 }
  93
  94 /* Program the status register. */
  95 int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr);
  96
  97 /*
  98  * Same as spi_flash_cmd_read() except it also claims/releases the SPI
  99  * bus. Used as common part of the ->read() operation.
 100  */
 101 int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
 102                 size_t cmd_len, void *data, size_t data_len);
 103 /*
 104  * Used for spi_flash write operation
 105  * - SPI claim
 106  * - spi_flash_cmd_write_enable
 107  * - spi_flash_cmd_write
 108  * - spi_flash_cmd_wait_ready
 109  * - SPI release
 110  */
 111 int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd,
 112                 size_t cmd_len, const void *buf, size_t buf_len);
 113
 114 /*
 115  * Send the read status command to the device and wait for the wip
 116  * (write-in-progress) bit to clear itself.
 117  */
 118 int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout);
 119
 120 /* Erase sectors. */
 121 int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len);