diff options
Diffstat (limited to 'src/drivers/spi/spansion.c')
| -rw-r--r-- | src/drivers/spi/spansion.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/src/drivers/spi/spansion.c b/src/drivers/spi/spansion.c new file mode 100644 index 0000000000..a4f370a6ab --- /dev/null +++ b/src/drivers/spi/spansion.c @@ -0,0 +1,241 @@ +/* + * Copyright (C) 2009 Freescale Semiconductor, Inc. + * + * Author: Mingkai Hu (Mingkai.hu@freescale.com) + * Based on stmicro.c by Wolfgang Denk (wd@denx.de), + * TsiChung Liew (Tsi-Chung.Liew@freescale.com), + * and Jason McMullan (mcmullan@netapp.com) + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <stdlib.h> +#include <spi_flash.h> +#include "spi_flash_internal.h" + +/* S25FLxx-specific commands */ +#define CMD_S25FLXX_READ 0x03 /* Read Data Bytes */ +#define CMD_S25FLXX_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */ +#define CMD_S25FLXX_READID 0x90 /* Read Manufacture ID and Device ID */ +#define CMD_S25FLXX_WREN 0x06 /* Write Enable */ +#define CMD_S25FLXX_WRDI 0x04 /* Write Disable */ +#define CMD_S25FLXX_RDSR 0x05 /* Read Status Register */ +#define CMD_S25FLXX_WRSR 0x01 /* Write Status Register */ +#define CMD_S25FLXX_PP 0x02 /* Page Program */ +#define CMD_S25FLXX_SE 0xd8 /* Sector Erase */ +#define CMD_S25FLXX_BE 0xc7 /* Bulk Erase */ +#define CMD_S25FLXX_DP 0xb9 /* Deep Power-down */ +#define CMD_S25FLXX_RES 0xab /* Release from DP, and Read Signature */ + +#define SPSN_ID_S25FL008A 0x0213 +#define SPSN_ID_S25FL016A 0x0214 +#define SPSN_ID_S25FL032A 0x0215 +#define SPSN_ID_S25FL064A 0x0216 +#define SPSN_ID_S25FL128P 0x2018 +#define SPSN_EXT_ID_S25FL128P_256KB 0x0300 +#define SPSN_EXT_ID_S25FL128P_64KB 0x0301 +#define SPSN_EXT_ID_S25FL032P 0x4d00 + +struct spansion_spi_flash_params { + u16 idcode1; + u16 idcode2; + u16 page_size; + u16 pages_per_sector; + u16 nr_sectors; + const char *name; +}; + +struct spansion_spi_flash { + struct spi_flash flash; + const struct spansion_spi_flash_params *params; +}; + +static inline struct spansion_spi_flash *to_spansion_spi_flash(struct spi_flash + *flash) +{ + return container_of(flash, struct spansion_spi_flash, flash); +} + +static const struct spansion_spi_flash_params spansion_spi_flash_table[] = { + { + .idcode1 = SPSN_ID_S25FL008A, + .idcode2 = 0, + .page_size = 256, + .pages_per_sector = 256, + .nr_sectors = 16, + .name = "S25FL008A", + }, + { + .idcode1 = SPSN_ID_S25FL016A, + .idcode2 = 0, + .page_size = 256, + .pages_per_sector = 256, + .nr_sectors = 32, + .name = "S25FL016A", + }, + { + .idcode1 = SPSN_ID_S25FL032A, + .idcode2 = 0, + .page_size = 256, + .pages_per_sector = 256, + .nr_sectors = 64, + .name = "S25FL032A", + }, + { + .idcode1 = SPSN_ID_S25FL064A, + .idcode2 = 0, + .page_size = 256, + .pages_per_sector = 256, + .nr_sectors = 128, + .name = "S25FL064A", + }, + { + .idcode1 = SPSN_ID_S25FL128P, + .idcode2 = SPSN_EXT_ID_S25FL128P_64KB, + .page_size = 256, + .pages_per_sector = 256, + .nr_sectors = 256, + .name = "S25FL128P_64K", + }, + { + .idcode1 = SPSN_ID_S25FL128P, + .idcode2 = SPSN_EXT_ID_S25FL128P_256KB, + .page_size = 256, + .pages_per_sector = 1024, + .nr_sectors = 64, + .name = "S25FL128P_256K", + }, + { + .idcode1 = SPSN_ID_S25FL032A, + .idcode2 = SPSN_EXT_ID_S25FL032P, + .page_size = 256, + .pages_per_sector = 256, + .nr_sectors = 64, + .name = "S25FL032P", + }, +}; + +static int spansion_write(struct spi_flash *flash, + u32 offset, size_t len, const void *buf) +{ + struct spansion_spi_flash *spsn = to_spansion_spi_flash(flash); + unsigned long page_addr; + unsigned long byte_addr; + unsigned long page_size; + size_t chunk_len; + size_t actual; + int ret; + u8 cmd[4]; + + page_size = spsn->params->page_size; + page_addr = offset / page_size; + byte_addr = offset % page_size; + + ret = spi_claim_bus(flash->spi); + if (ret) { + printk(BIOS_WARNING, "SF: Unable to claim SPI bus\n"); + return ret; + } + + ret = 0; + for (actual = 0; actual < len; actual += chunk_len) { + chunk_len = min(len - actual, page_size - byte_addr); + + cmd[0] = CMD_S25FLXX_PP; + cmd[1] = page_addr >> 8; + cmd[2] = page_addr; + cmd[3] = byte_addr; + + printk(BIOS_SPEW, "PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zd\n", + buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len); + + ret = spi_flash_cmd(flash->spi, CMD_S25FLXX_WREN, NULL, 0); + if (ret < 0) { + printk(BIOS_WARNING, "SF: Enabling Write failed\n"); + break; + } + + ret = spi_flash_cmd_write(flash->spi, cmd, 4, + buf + actual, chunk_len); + if (ret < 0) { + printk(BIOS_WARNING, "SF: SPANSION Page Program failed\n"); + break; + } + + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + if (ret) + break; + + page_addr++; + byte_addr = 0; + } + + printk(BIOS_INFO, "SF: SPANSION: Successfully programmed %zu bytes @ 0x%x\n", + len, offset); + + spi_release_bus(flash->spi); + return ret; +} + +static int spansion_erase(struct spi_flash *flash, u32 offset, size_t len) +{ + return spi_flash_cmd_erase(flash, CMD_S25FLXX_SE, offset, len); +} + +struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode) +{ + const struct spansion_spi_flash_params *params; + struct spansion_spi_flash *spsn; + unsigned int i; + unsigned short jedec, ext_jedec; + + jedec = idcode[1] << 8 | idcode[2]; + ext_jedec = idcode[3] << 8 | idcode[4]; + + for (i = 0; i < ARRAY_SIZE(spansion_spi_flash_table); i++) { + params = &spansion_spi_flash_table[i]; + if (params->idcode1 == jedec) { + if (params->idcode2 == ext_jedec) + break; + } + } + + if (i == ARRAY_SIZE(spansion_spi_flash_table)) { + printk(BIOS_WARNING, "SF: Unsupported SPANSION ID %04x %04x\n", jedec, ext_jedec); + return NULL; + } + + spsn = malloc(sizeof(struct spansion_spi_flash)); + if (!spsn) { + printk(BIOS_WARNING, "SF: Failed to allocate memory\n"); + return NULL; + } + + spsn->params = params; + spsn->flash.spi = spi; + spsn->flash.name = params->name; + + spsn->flash.write = spansion_write; + spsn->flash.erase = spansion_erase; + spsn->flash.read = spi_flash_cmd_read_fast; + spsn->flash.sector_size = params->page_size * params->pages_per_sector; + spsn->flash.size = spsn->flash.sector_size * params->nr_sectors; + + return &spsn->flash; +} |