diff options
Diffstat (limited to 'drivers/mtd/spi/spi_flash_internal.h')
| -rw-r--r-- | drivers/mtd/spi/spi_flash_internal.h | 119 |
1 files changed, 70 insertions, 49 deletions
diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h index 1f9f170..29a14f4 100644 --- a/drivers/mtd/spi/spi_flash_internal.h +++ b/drivers/mtd/spi/spi_flash_internal.h @@ -2,37 +2,43 @@ * SPI flash internal definitions * * Copyright (C) 2008 Atmel Corporation + * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc. + * + * Licensed under the GPL-2 or later. */ -/* Common parameters -- kind of high, but they should only occur when there - * is a problem (and well your system already is broken), so err on the side - * of caution in case we're dealing with slower SPI buses and/or processors. - */ -#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) +#ifndef _SPI_FLASH_INTERNAL_H_ +#define _SPI_FLASH_INTERNAL_H_ -/* Common commands */ -#define CMD_READ_ID 0x9f +#define SPI_FLASH_16MB_BOUN 0x1000000 -#define CMD_READ_ARRAY_SLOW 0x03 -#define CMD_READ_ARRAY_FAST 0x0b +/* 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_FLAG_STATUS 0x70 #define CMD_WRITE_ENABLE 0x06 -#define CMD_ERASE_4K 0x20 -#define CMD_ERASE_32K 0x52 -#define CMD_ERASE_64K 0xd8 -#define CMD_ERASE_CHIP 0xc7 +#define CMD_READ_CONFIG 0x35 +#define CMD_FLAG_STATUS 0x70 -#define SPI_FLASH_16MB_BOUN 0x1000000 +/* Read commands */ +#define CMD_READ_ARRAY_SLOW 0x03 +#define CMD_READ_ARRAY_FAST 0x0b +#define CMD_READ_ID 0x9f -#ifdef CONFIG_SPI_FLASH_BAR /* Bank addr access commands */ +#ifdef CONFIG_SPI_FLASH_BAR # define CMD_BANKADDR_BRWR 0x17 # define CMD_BANKADDR_BRRD 0x16 # define CMD_EXTNADDR_WREAR 0xC5 @@ -43,6 +49,21 @@ #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); @@ -53,9 +74,6 @@ int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len); int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, void *data, size_t data_len); -int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset, - size_t len, void *data); - /* * Send a multi-byte command to the device followed by (optional) * data. Used for programming the flash array, etc. @@ -63,43 +81,34 @@ int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset, int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, const void *data, size_t data_len); -/* - * Write the requested data out breaking it up into multiple write - * commands as needed per the write size. - */ -int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset, - size_t len, const void *buf); -#ifdef CONFIG_SPI_FLASH_SST -int sst_write_wp(struct spi_flash *flash, u32 offset, size_t len, - const void *buf); -#endif +/* Flash erase(sectors) operation, support all possible erase commands */ +int spi_flash_cmd_erase_ops(struct spi_flash *flash, u32 offset, size_t len); -/* - * Enable writing on the SPI flash. - */ +/* 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. - */ +/* 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); } -/* Program the status register. */ -int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr); - /* - * Same as spi_flash_cmd_read() except it also claims/releases the SPI - * bus. Used as common part of the ->read() operation. + * Send the read status command to the device and wait for the wip + * (write-in-progress) bit to clear itself. */ -int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, - size_t cmd_len, void *data, size_t data_len); +int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout); + /* * Used for spi_flash write operation * - SPI claim @@ -112,10 +121,22 @@ int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd, size_t cmd_len, const void *buf, size_t buf_len); /* - * Send the read status command to the device and wait for the wip - * (write-in-progress) bit to clear itself. + * 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_wait_ready(struct spi_flash *flash, unsigned long timeout); +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); -/* Erase sectors. */ -int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len); +#endif /* _SPI_FLASH_INTERNAL_H_ */ |