2 * (C) Copyright 2010, ucRobotics Inc.
3 * Author: Chong Huang <chuang@ucrobotics.com>
4 * Licensed under the GPL-2 or later.
11 #include "spi_flash_internal.h"
13 /* EN25Q128-specific commands */
14 #define CMD_EN25Q128_WREN 0x06 /* Write Enable */
15 #define CMD_EN25Q128_WRDI 0x04 /* Write Disable */
16 #define CMD_EN25Q128_RDSR 0x05 /* Read Status Register */
17 #define CMD_EN25Q128_WRSR 0x01 /* Write Status Register */
18 #define CMD_EN25Q128_READ 0x03 /* Read Data Bytes */
19 #define CMD_EN25Q128_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
20 #define CMD_EN25Q128_PP 0x02 /* Page Program */
21 #define CMD_EN25Q128_SE 0x20 /* Sector Erase */
22 #define CMD_EN25Q128_BE 0xd8 /* Block Erase */
23 #define CMD_EN25Q128_DP 0xb9 /* Deep Power-down */
24 #define CMD_EN25Q128_RES 0xab /* Release from DP, and Read Signature */
26 #define EON_ID_EN25Q128 0x18
28 struct eon_spi_flash_params {
32 u16 sectors_per_block;
37 static const struct eon_spi_flash_params eon_spi_flash_table[] = {
39 .idcode1 = EON_ID_EN25Q128,
41 .pages_per_sector = 16,
42 .sectors_per_block = 16,
48 static int eon_erase(struct spi_flash *flash, u32 offset, size_t len)
50 return spi_flash_cmd_erase(flash, CMD_EN25Q128_BE, offset, len);
53 struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
55 const struct eon_spi_flash_params *params;
56 struct spi_flash *flash;
59 for (i = 0; i < ARRAY_SIZE(eon_spi_flash_table); ++i) {
60 params = &eon_spi_flash_table[i];
61 if (params->idcode1 == idcode[2])
65 if (i == ARRAY_SIZE(eon_spi_flash_table)) {
66 debug("SF: Unsupported EON ID %02x\n", idcode[1]);
70 flash = malloc(sizeof(*flash));
72 debug("SF: Failed to allocate memory\n");
77 flash->name = params->name;
79 flash->write = spi_flash_cmd_write_multi;
80 flash->erase = eon_erase;
81 flash->read = spi_flash_cmd_read_fast;
82 flash->page_size = params->page_size;
83 flash->sector_size = params->page_size * params->pages_per_sector
84 * params->sectors_per_block;
85 flash->size = params->page_size * params->pages_per_sector