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+/*
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+ * Copyright (C) 2009 Freescale Semiconductor, Inc.
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+ *
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+ * Author: Mingkai Hu (Mingkai.hu@freescale.com)
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+ * Based on stmicro.c by Wolfgang Denk (wd@denx.de),
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+ * TsiChung Liew (Tsi-Chung.Liew@freescale.com),
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+ * and Jason McMullan (mcmullan@netapp.com)
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+ *
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+ * See file CREDITS for list of people who contributed to this
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+ * project.
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License as
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+ * published by the Free Software Foundation; either version 2 of
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+ * the License, or (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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+ * MA 02111-1307 USA
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+ */
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+
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+#include <common.h>
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+#include <malloc.h>
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+#include <spi_flash.h>
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+
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+#include "spi_flash_internal.h"
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+
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+/* S25FLxx-specific commands */
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+#define CMD_S25FLXX_READ 0x03 /* Read Data Bytes */
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+#define CMD_S25FLXX_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
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+#define CMD_S25FLXX_READID 0x90 /* Read Manufacture ID and Device ID */
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+#define CMD_S25FLXX_WREN 0x06 /* Write Enable */
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+#define CMD_S25FLXX_WRDI 0x04 /* Write Disable */
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+#define CMD_S25FLXX_RDSR 0x05 /* Read Status Register */
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+#define CMD_S25FLXX_WRSR 0x01 /* Write Status Register */
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+#define CMD_S25FLXX_PP 0x02 /* Page Program */
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+#define CMD_S25FLXX_SE 0xd8 /* Sector Erase */
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+#define CMD_S25FLXX_BE 0xc7 /* Bulk Erase */
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+#define CMD_S25FLXX_DP 0xb9 /* Deep Power-down */
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+#define CMD_S25FLXX_RES 0xab /* Release from DP, and Read Signature */
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+
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+#define SPSN_ID_S25FL008A 0x0213
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+#define SPSN_ID_S25FL016A 0x0214
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+#define SPSN_ID_S25FL032A 0x0215
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+#define SPSN_ID_S25FL064A 0x0216
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+#define SPSN_ID_S25FL128P 0x2018
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+#define SPSN_EXT_ID_S25FL128P_256KB 0x0300
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+#define SPSN_EXT_ID_S25FL128P_64KB 0x0301
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+
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+#define SPANSION_SR_WIP (1 << 0) /* Write-in-Progress */
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+
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+struct spansion_spi_flash_params {
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+ u16 idcode1;
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+ u16 idcode2;
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+ u16 page_size;
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+ u16 pages_per_sector;
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+ u16 nr_sectors;
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+ const char *name;
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+};
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+
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+struct spansion_spi_flash {
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+ struct spi_flash flash;
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+ const struct spansion_spi_flash_params *params;
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+};
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+
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+static inline struct spansion_spi_flash *to_spansion_spi_flash(struct spi_flash
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+ *flash)
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+{
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+ return container_of(flash, struct spansion_spi_flash, flash);
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+}
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+
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+static const struct spansion_spi_flash_params spansion_spi_flash_table[] = {
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+ {
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+ .idcode1 = SPSN_ID_S25FL008A,
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+ .idcode2 = 0,
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+ .page_size = 256,
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+ .pages_per_sector = 256,
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+ .nr_sectors = 16,
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+ .name = "S25FL008A",
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+ },
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+ {
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+ .idcode1 = SPSN_ID_S25FL016A,
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+ .idcode2 = 0,
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+ .page_size = 256,
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+ .pages_per_sector = 256,
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+ .nr_sectors = 32,
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+ .name = "S25FL016A",
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+ },
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+ {
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+ .idcode1 = SPSN_ID_S25FL032A,
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+ .idcode2 = 0,
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+ .page_size = 256,
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+ .pages_per_sector = 256,
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+ .nr_sectors = 64,
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+ .name = "S25FL032A",
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+ },
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+ {
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+ .idcode1 = SPSN_ID_S25FL064A,
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+ .idcode2 = 0,
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+ .page_size = 256,
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+ .pages_per_sector = 256,
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+ .nr_sectors = 128,
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+ .name = "S25FL064A",
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+ },
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+ {
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+ .idcode1 = SPSN_ID_S25FL128P,
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+ .idcode2 = SPSN_EXT_ID_S25FL128P_64KB,
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+ .page_size = 256,
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+ .pages_per_sector = 256,
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+ .nr_sectors = 256,
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+ .name = "S25FL128P_64K",
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+ },
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+ {
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+ .idcode1 = SPSN_ID_S25FL128P,
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+ .idcode2 = SPSN_EXT_ID_S25FL128P_256KB,
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+ .page_size = 256,
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+ .pages_per_sector = 1024,
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+ .nr_sectors = 64,
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+ .name = "S25FL128P_256K",
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+ },
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+};
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+
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+static int spansion_wait_ready(struct spi_flash *flash, unsigned long timeout)
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+{
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+ struct spi_slave *spi = flash->spi;
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+ unsigned long timebase;
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+ int ret;
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+ u8 status;
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+
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+ timebase = get_timer(0);
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+ do {
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+ ret = spi_flash_cmd(spi, CMD_S25FLXX_RDSR, &status, sizeof(status));
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+ if (ret)
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+ return -1;
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+
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+ if ((status & SPANSION_SR_WIP) == 0)
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+ break;
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+
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+ } while (get_timer(timebase) < timeout);
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+
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+
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+ if ((status & SPANSION_SR_WIP) == 0)
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+ return 0;
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+
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+ /* Timed out */
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+ return -1;
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+}
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+
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+static int spansion_read_fast(struct spi_flash *flash,
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+ u32 offset, size_t len, void *buf)
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+{
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+ struct spansion_spi_flash *spsn = to_spansion_spi_flash(flash);
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+ unsigned long page_addr;
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+ unsigned long page_size;
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+ u8 cmd[5];
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+
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+ page_size = spsn->params->page_size;
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+ page_addr = offset / page_size;
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+
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+ cmd[0] = CMD_READ_ARRAY_FAST;
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+ cmd[1] = page_addr >> 8;
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+ cmd[2] = page_addr;
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+ cmd[3] = offset % page_size;
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+ cmd[4] = 0x00;
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+
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+ debug
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+ ("READ: 0x%x => cmd = { 0x%02x 0x%02x%02x%02x%02x } len = 0x%x\n",
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+ offset, cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], len);
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+
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+ return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len);
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+}
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+
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+static int spansion_write(struct spi_flash *flash,
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+ u32 offset, size_t len, const void *buf)
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+{
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+ struct spansion_spi_flash *spsn = to_spansion_spi_flash(flash);
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+ unsigned long page_addr;
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+ unsigned long byte_addr;
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+ unsigned long page_size;
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+ size_t chunk_len;
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+ size_t actual;
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+ int ret;
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+ u8 cmd[4];
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+
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+ page_size = spsn->params->page_size;
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+ page_addr = offset / page_size;
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+ byte_addr = offset % page_size;
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+
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+ ret = spi_claim_bus(flash->spi);
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+ if (ret) {
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+ debug("SF: Unable to claim SPI bus\n");
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+ return ret;
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+ }
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+
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+ ret = 0;
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+ for (actual = 0; actual < len; actual += chunk_len) {
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+ chunk_len = min(len - actual, page_size - byte_addr);
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+
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+ cmd[0] = CMD_S25FLXX_PP;
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+ cmd[1] = page_addr >> 8;
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+ cmd[2] = page_addr;
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+ cmd[3] = byte_addr;
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+
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+ debug
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+ ("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %d\n",
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+ buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
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+
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+ ret = spi_flash_cmd(flash->spi, CMD_S25FLXX_WREN, NULL, 0);
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+ if (ret < 0) {
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+ debug("SF: Enabling Write failed\n");
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+ break;
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+ }
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+
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+ ret = spi_flash_cmd_write(flash->spi, cmd, 4,
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+ buf + actual, chunk_len);
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+ if (ret < 0) {
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+ debug("SF: SPANSION Page Program failed\n");
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+ break;
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+ }
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+
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+ ret = spansion_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
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+ if (ret < 0) {
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+ debug("SF: SPANSION page programming timed out\n");
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+ break;
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+ }
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+
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+ page_addr++;
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+ byte_addr = 0;
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+ }
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+
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+ debug("SF: SPANSION: Successfully programmed %u bytes @ 0x%x\n",
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+ len, offset);
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+
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+ spi_release_bus(flash->spi);
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+ return ret;
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+}
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+
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+int spansion_erase(struct spi_flash *flash, u32 offset, size_t len)
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+{
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+ struct spansion_spi_flash *spsn = to_spansion_spi_flash(flash);
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+ unsigned long sector_size;
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+ size_t actual;
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+ int ret;
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+ u8 cmd[4];
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+
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+ /*
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+ * This function currently uses sector erase only.
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+ * probably speed things up by using bulk erase
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+ * when possible.
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+ */
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+
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+ sector_size = spsn->params->page_size * spsn->params->pages_per_sector;
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+
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+ if (offset % sector_size || len % sector_size) {
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+ debug("SF: Erase offset/length not multiple of sector size\n");
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+ return -1;
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+ }
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+
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+ len /= sector_size;
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+ cmd[0] = CMD_S25FLXX_SE;
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+ cmd[2] = 0x00;
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+ cmd[3] = 0x00;
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+
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+ ret = spi_claim_bus(flash->spi);
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+ if (ret) {
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+ debug("SF: Unable to claim SPI bus\n");
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+ return ret;
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+ }
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+
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+ ret = 0;
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+ for (actual = 0; actual < len; actual++) {
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+ cmd[1] = (offset / sector_size) + actual;
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+
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+ ret = spi_flash_cmd(flash->spi, CMD_S25FLXX_WREN, NULL, 0);
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+ if (ret < 0) {
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+ debug("SF: Enabling Write failed\n");
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+ break;
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+ }
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+
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+ ret = spi_flash_cmd_write(flash->spi, cmd, 4, NULL, 0);
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+ if (ret < 0) {
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+ debug("SF: SPANSION page erase failed\n");
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+ break;
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+ }
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+
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+ /* Up to 2 seconds */
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+ ret = spansion_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
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+ if (ret < 0) {
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+ debug("SF: SPANSION page erase timed out\n");
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+ break;
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+ }
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+ }
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+
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+ debug("SF: SPANSION: Successfully erased %u bytes @ 0x%x\n",
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+ len * sector_size, offset);
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+
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+ spi_release_bus(flash->spi);
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+ return ret;
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+}
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+
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+struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode)
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+{
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+ const struct spansion_spi_flash_params *params;
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+ struct spansion_spi_flash *spsn;
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+ unsigned int i;
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+ unsigned short jedec, ext_jedec;
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+
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+ jedec = idcode[1] << 8 | idcode[2];
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+ ext_jedec = idcode[3] << 8 | idcode[4];
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+
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+ for (i = 0; i < ARRAY_SIZE(spansion_spi_flash_table); i++) {
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+ params = &spansion_spi_flash_table[i];
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+ if (params->idcode1 == jedec) {
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+ if (params->idcode2 == ext_jedec)
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+ break;
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+ }
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+ }
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+
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+ if (i == ARRAY_SIZE(spansion_spi_flash_table)) {
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+ debug("SF: Unsupported SPANSION ID %04x %04x\n", jedec, ext_jedec);
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+ return NULL;
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+ }
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+
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+ spsn = malloc(sizeof(struct spansion_spi_flash));
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+ if (!spsn) {
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+ debug("SF: Failed to allocate memory\n");
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+ return NULL;
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+ }
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+
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+ spsn->params = params;
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+ spsn->flash.spi = spi;
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+ spsn->flash.name = params->name;
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+
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+ spsn->flash.write = spansion_write;
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+ spsn->flash.erase = spansion_erase;
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+ spsn->flash.read = spansion_read_fast;
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+ spsn->flash.size = params->page_size * params->pages_per_sector
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+ * params->nr_sectors;
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+
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+ debug("SF: Detected %s with page size %u, total %u bytes\n",
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+ params->name, params->page_size, spsn->flash.size);
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+
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+ return &spsn->flash;
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+}
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Wolfgang Denk