diff options
Diffstat (limited to 'drivers/mtd/spi/sf_internal.h')
| -rw-r--r-- | drivers/mtd/spi/sf_internal.h | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h new file mode 100644 index 0000000..29a14f4 --- /dev/null +++ b/drivers/mtd/spi/sf_internal.h @@ -0,0 +1,142 @@ +/* + * SPI flash internal definitions + * + * Copyright (C) 2008 Atmel Corporation + * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc. + * + * Licensed under the GPL-2 or later. + */ + +#ifndef _SPI_FLASH_INTERNAL_H_ +#define _SPI_FLASH_INTERNAL_H_ + +#define SPI_FLASH_16MB_BOUN 0x1000000 + +/* SECT flags */ +#define SECT_4K (1 << 1) +#define SECT_32K (1 << 2) +#define E_FSR (1 << 3) + +/* Erase commands */ +#define CMD_ERASE_4K 0x20 +#define CMD_ERASE_32K 0x52 +#define CMD_ERASE_CHIP 0xc7 +#define CMD_ERASE_64K 0xd8 + +/* Write commands */ +#define CMD_WRITE_STATUS 0x01 +#define CMD_PAGE_PROGRAM 0x02 +#define CMD_WRITE_DISABLE 0x04 +#define CMD_READ_STATUS 0x05 +#define CMD_WRITE_ENABLE 0x06 +#define CMD_READ_CONFIG 0x35 +#define CMD_FLAG_STATUS 0x70 + +/* Read commands */ +#define CMD_READ_ARRAY_SLOW 0x03 +#define CMD_READ_ARRAY_FAST 0x0b +#define CMD_READ_ID 0x9f + +/* Bank addr access commands */ +#ifdef CONFIG_SPI_FLASH_BAR +# define CMD_BANKADDR_BRWR 0x17 +# define CMD_BANKADDR_BRRD 0x16 +# define CMD_EXTNADDR_WREAR 0xC5 +# define CMD_EXTNADDR_RDEAR 0xC8 +#endif + +/* Common status */ +#define STATUS_WIP 0x01 +#define STATUS_PEC 0x80 + +/* Flash timeout values */ +#define SPI_FLASH_PROG_TIMEOUT (2 * CONFIG_SYS_HZ) +#define SPI_FLASH_PAGE_ERASE_TIMEOUT (5 * CONFIG_SYS_HZ) +#define SPI_FLASH_SECTOR_ERASE_TIMEOUT (10 * CONFIG_SYS_HZ) + +/* SST specific */ +#ifdef CONFIG_SPI_FLASH_SST +# define SST_WP 0x01 /* Supports AAI word program */ +# define CMD_SST_BP 0x02 /* Byte Program */ +# define CMD_SST_AAI_WP 0xAD /* Auto Address Incr Word Program */ + +int sst_write_wp(struct spi_flash *flash, u32 offset, size_t len, + const void *buf); +#endif + +/* Send a single-byte command to the device and read the response */ +int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len); + +/* + * Send a multi-byte command to the device and read the response. Used + * for flash array reads, etc. + */ +int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd, + size_t cmd_len, void *data, size_t data_len); + +/* + * Send a multi-byte command to the device followed by (optional) + * data. Used for programming the flash array, etc. + */ +int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, + const void *data, size_t data_len); + + +/* Flash erase(sectors) operation, support all possible erase commands */ +int spi_flash_cmd_erase_ops(struct spi_flash *flash, u32 offset, size_t len); + +/* Program the status register */ +int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr); + +/* Set quad enbale bit */ +int spi_flash_set_qeb(struct spi_flash *flash); + +/* Enable writing on the SPI flash */ +static inline int spi_flash_cmd_write_enable(struct spi_flash *flash) +{ + return spi_flash_cmd(flash->spi, CMD_WRITE_ENABLE, NULL, 0); +} + +/* Disable writing on the SPI flash */ +static inline int spi_flash_cmd_write_disable(struct spi_flash *flash) +{ + return spi_flash_cmd(flash->spi, CMD_WRITE_DISABLE, NULL, 0); +} + +/* + * Send the read status command to the device and wait for the wip + * (write-in-progress) bit to clear itself. + */ +int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout); + +/* + * Used for spi_flash write operation + * - SPI claim + * - spi_flash_cmd_write_enable + * - spi_flash_cmd_write + * - spi_flash_cmd_wait_ready + * - SPI release + */ +int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd, + size_t cmd_len, const void *buf, size_t buf_len); + +/* + * Flash write operation, support all possible write commands. + * Write the requested data out breaking it up into multiple write + * commands as needed per the write size. + */ +int spi_flash_cmd_write_ops(struct spi_flash *flash, u32 offset, + size_t len, const void *buf); + +/* + * Same as spi_flash_cmd_read() except it also claims/releases the SPI + * bus. Used as common part of the ->read() operation. + */ +int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, + size_t cmd_len, void *data, size_t data_len); + +/* Flash read operation, support all possible read commands */ +int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset, + size_t len, void *data); + +#endif /* _SPI_FLASH_INTERNAL_H_ */ |