drivers/mtd/spi/spansion.c - uboot/qsr1000 - Git at Google

 /*
  * 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 <common.h>
 #include <malloc.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 SPANSION_SR_WIP		(1 << 0)	/* Write-in-Progress */

 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",
 	},
 };

 static int spansion_wait_ready(struct spi_flash *flash, unsigned long timeout)
 {
 	struct spi_slave *spi = flash->spi;
 	unsigned long timebase;
 	int ret;
 	u8 status;

 	timebase = get_timer(0);
 	do {
 		ret = spi_flash_cmd(spi, CMD_S25FLXX_RDSR, &status, sizeof(status));
 		if (ret)
 			return -1;

 		if ((status & SPANSION_SR_WIP) == 0)
 			break;

 	} while (get_timer(timebase) < timeout);


 	if ((status & SPANSION_SR_WIP) == 0)
 		return 0;

 	/* Timed out */
 	return -1;
 }

 static int spansion_read_fast(struct spi_flash *flash,
 			     u32 offset, size_t len, void *buf)
 {
 	struct spansion_spi_flash *spsn = to_spansion_spi_flash(flash);
 	unsigned long page_addr;
 	unsigned long page_size;
 	u8 cmd[5];

 	page_size = spsn->params->page_size;
 	page_addr = offset / page_size;

 	cmd[0] = CMD_READ_ARRAY_FAST;
 	cmd[1] = page_addr >> 8;
 	cmd[2] = page_addr;
 	cmd[3] = offset % page_size;
 	cmd[4] = 0x00;

 	debug
 		("READ: 0x%x => cmd = { 0x%02x 0x%02x%02x%02x%02x } len = 0x%x\n",
 		 offset, cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], len);

 	return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len);
 }

 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) {
 		debug("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;

 		debug
 		    ("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %d\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) {
 			debug("SF: Enabling Write failed\n");
 			break;
 		}

 		ret = spi_flash_cmd_write(flash->spi, cmd, 4,
 					  buf + actual, chunk_len);
 		if (ret < 0) {
 			debug("SF: SPANSION Page Program failed\n");
 			break;
 		}

 		ret = spansion_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
 		if (ret < 0) {
 			debug("SF: SPANSION page programming timed out\n");
 			break;
 		}

 		page_addr++;
 		byte_addr = 0;
 	}

 	debug("SF: SPANSION: Successfully programmed %u bytes @ 0x%x\n",
 	      len, offset);

 	spi_release_bus(flash->spi);
 	return ret;
 }

 int spansion_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
 	struct spansion_spi_flash *spsn = to_spansion_spi_flash(flash);
 	unsigned long sector_size;
 	size_t actual;
 	int ret;
 	u8 cmd[4];

 	/*
 	 * This function currently uses sector erase only.
 	 * probably speed things up by using bulk erase
 	 * when possible.
 	 */

 	sector_size = spsn->params->page_size * spsn->params->pages_per_sector;

 	if (offset % sector_size || len % sector_size) {
 		debug("SF: Erase offset/length not multiple of sector size\n");
 		return -1;
 	}

 	len /= sector_size;
 	cmd[0] = CMD_S25FLXX_SE;
 	cmd[2] = 0x00;
 	cmd[3] = 0x00;

 	ret = spi_claim_bus(flash->spi);
 	if (ret) {
 		debug("SF: Unable to claim SPI bus\n");
 		return ret;
 	}

 	ret = 0;
 	for (actual = 0; actual < len; actual++) {
 		cmd[1] = (offset / sector_size) + actual;

 		ret = spi_flash_cmd(flash->spi, CMD_S25FLXX_WREN, NULL, 0);
 		if (ret < 0) {
 			debug("SF: Enabling Write failed\n");
 			break;
 		}

 		ret = spi_flash_cmd_write(flash->spi, cmd, 4, NULL, 0);
 		if (ret < 0) {
 			debug("SF: SPANSION page erase failed\n");
 			break;
 		}

 		/* Up to 2 seconds */
 		ret = spansion_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
 		if (ret < 0) {
 			debug("SF: SPANSION page erase timed out\n");
 			break;
 		}
 	}

 	debug("SF: SPANSION: Successfully erased %u bytes @ 0x%x\n",
 	      len * sector_size, offset);

 	spi_release_bus(flash->spi);
 	return ret;
 }

 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)) {
 		debug("SF: Unsupported SPANSION ID %04x %04x\n", jedec, ext_jedec);
 		return NULL;
 	}

 	spsn = malloc(sizeof(struct spansion_spi_flash));
 	if (!spsn) {
 		debug("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 = spansion_read_fast;
 	spsn->flash.size = params->page_size * params->pages_per_sector
 	    * params->nr_sectors;

 	debug("SF: Detected %s with page size %u, total %u bytes\n",
 	      params->name, params->page_size, spsn->flash.size);

 	return &spsn->flash;
 }
	/*
	* 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 <common.h>
	#include <malloc.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 SPANSION_SR_WIP (1 << 0) /* Write-in-Progress */

	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",
	},
	};

	static int spansion_wait_ready(struct spi_flash *flash, unsigned long timeout)
	{
	struct spi_slave *spi = flash->spi;
	unsigned long timebase;
	int ret;
	u8 status;

	timebase = get_timer(0);
	do {
	ret = spi_flash_cmd(spi, CMD_S25FLXX_RDSR, &status, sizeof(status));
	if (ret)
	return -1;

	if ((status & SPANSION_SR_WIP) == 0)
	break;

	} while (get_timer(timebase) < timeout);


	if ((status & SPANSION_SR_WIP) == 0)
	return 0;

	/* Timed out */
	return -1;
	}

	static int spansion_read_fast(struct spi_flash *flash,
	u32 offset, size_t len, void *buf)
	{
	struct spansion_spi_flash *spsn = to_spansion_spi_flash(flash);
	unsigned long page_addr;
	unsigned long page_size;
	u8 cmd[5];

	page_size = spsn->params->page_size;
	page_addr = offset / page_size;

	cmd[0] = CMD_READ_ARRAY_FAST;
	cmd[1] = page_addr >> 8;
	cmd[2] = page_addr;
	cmd[3] = offset % page_size;
	cmd[4] = 0x00;

	debug
	("READ: 0x%x => cmd = { 0x%02x 0x%02x%02x%02x%02x } len = 0x%x\n",
	offset, cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], len);

	return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len);
	}

	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) {
	debug("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;

	debug
	("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %d\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) {
	debug("SF: Enabling Write failed\n");
	break;
	}

	ret = spi_flash_cmd_write(flash->spi, cmd, 4,
	buf + actual, chunk_len);
	if (ret < 0) {
	debug("SF: SPANSION Page Program failed\n");
	break;
	}

	ret = spansion_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
	if (ret < 0) {
	debug("SF: SPANSION page programming timed out\n");
	break;
	}

	page_addr++;
	byte_addr = 0;
	}

	debug("SF: SPANSION: Successfully programmed %u bytes @ 0x%x\n",
	len, offset);

	spi_release_bus(flash->spi);
	return ret;
	}

	int spansion_erase(struct spi_flash *flash, u32 offset, size_t len)
	{
	struct spansion_spi_flash *spsn = to_spansion_spi_flash(flash);
	unsigned long sector_size;
	size_t actual;
	int ret;
	u8 cmd[4];

	/*
	* This function currently uses sector erase only.
	* probably speed things up by using bulk erase
	* when possible.
	*/

	sector_size = spsn->params->page_size * spsn->params->pages_per_sector;

	if (offset % sector_size \|\| len % sector_size) {
	debug("SF: Erase offset/length not multiple of sector size\n");
	return -1;
	}

	len /= sector_size;
	cmd[0] = CMD_S25FLXX_SE;
	cmd[2] = 0x00;
	cmd[3] = 0x00;

	ret = spi_claim_bus(flash->spi);
	if (ret) {
	debug("SF: Unable to claim SPI bus\n");
	return ret;
	}

	ret = 0;
	for (actual = 0; actual < len; actual++) {
	cmd[1] = (offset / sector_size) + actual;

	ret = spi_flash_cmd(flash->spi, CMD_S25FLXX_WREN, NULL, 0);
	if (ret < 0) {
	debug("SF: Enabling Write failed\n");
	break;
	}

	ret = spi_flash_cmd_write(flash->spi, cmd, 4, NULL, 0);
	if (ret < 0) {
	debug("SF: SPANSION page erase failed\n");
	break;
	}

	/* Up to 2 seconds */
	ret = spansion_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
	if (ret < 0) {
	debug("SF: SPANSION page erase timed out\n");
	break;
	}
	}

	debug("SF: SPANSION: Successfully erased %u bytes @ 0x%x\n",
	len * sector_size, offset);

	spi_release_bus(flash->spi);
	return ret;
	}

	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)) {
	debug("SF: Unsupported SPANSION ID %04x %04x\n", jedec, ext_jedec);
	return NULL;
	}

	spsn = malloc(sizeof(struct spansion_spi_flash));
	if (!spsn) {
	debug("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 = spansion_read_fast;
	spsn->flash.size = params->page_size * params->pages_per_sector
	* params->nr_sectors;

	debug("SF: Detected %s with page size %u, total %u bytes\n",
	params->name, params->page_size, spsn->flash.size);

	return &spsn->flash;
	}