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

 /*
  * (C) Copyright 2000-2002
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * Copyright 2008, Network Appliance Inc.
  * Jason McMullan <mcmullan@netapp.com>
  *
  * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
  * TsiChung Liew (Tsi-Chung.Liew@freescale.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"

 /* M25Pxx-specific commands */
 #define CMD_M25PXX_WREN		0x06	/* Write Enable */
 #define CMD_M25PXX_WRDI		0x04	/* Write Disable */
 #define CMD_M25PXX_RDSR		0x05	/* Read Status Register */
 #define CMD_M25PXX_WRSR		0x01	/* Write Status Register */
 #define CMD_M25PXX_READ		0x03	/* Read Data Bytes */
 #define CMD_M25PXX_FAST_READ	0x0b	/* Read Data Bytes at Higher Speed */
 #define CMD_M25PXX_PP		0x02	/* Page Program */
 #define CMD_M25PXX_SE		0xd8	/* Sector Erase */
 #define CMD_M25PXX_BE		0xc7	/* Bulk Erase */
 #define CMD_M25PXX_DP		0xb9	/* Deep Power-down */
 #define CMD_M25PXX_RES		0xab	/* Release from DP, and Read Signature */

 #define STM_ID_M25P16		0x15
 #define STM_ID_M25P20		0x12
 #define STM_ID_M25P32		0x16
 #define STM_ID_M25P40		0x13
 #define STM_ID_M25P64		0x17
 #define STM_ID_M25P80		0x14
 #define STM_ID_M25P128		0x18

 #define STMICRO_SR_WIP		(1 << 0)	/* Write-in-Progress */

 struct stmicro_spi_flash_params {
 	u8 idcode1;
 	u16 page_size;
 	u16 pages_per_sector;
 	u16 nr_sectors;
 	const char *name;
 };

 /* spi_flash needs to be first so upper layers can free() it */
 struct stmicro_spi_flash {
 	struct spi_flash flash;
 	const struct stmicro_spi_flash_params *params;
 };

 static inline struct stmicro_spi_flash *to_stmicro_spi_flash(struct spi_flash
 							     *flash)
 {
 	return container_of(flash, struct stmicro_spi_flash, flash);
 }

 static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
 	{
 		.idcode1 = STM_ID_M25P16,
 		.page_size = 256,
 		.pages_per_sector = 256,
 		.nr_sectors = 32,
 		.name = "M25P16",
 	},
 	{
 		.idcode1 = STM_ID_M25P20,
 		.page_size = 256,
 		.pages_per_sector = 256,
 		.nr_sectors = 4,
 		.name = "M25P20",
 	},
 	{
 		.idcode1 = STM_ID_M25P32,
 		.page_size = 256,
 		.pages_per_sector = 256,
 		.nr_sectors = 64,
 		.name = "M25P32",
 	},
 	{
 		.idcode1 = STM_ID_M25P40,
 		.page_size = 256,
 		.pages_per_sector = 256,
 		.nr_sectors = 8,
 		.name = "M25P40",
 	},
 	{
 		.idcode1 = STM_ID_M25P64,
 		.page_size = 256,
 		.pages_per_sector = 256,
 		.nr_sectors = 128,
 		.name = "M25P64",
 	},
 	{
 		.idcode1 = STM_ID_M25P80,
 		.page_size = 256,
 		.pages_per_sector = 256,
 		.nr_sectors = 16,
 		.name = "M25P80",
 	},
 	{
 		.idcode1 = STM_ID_M25P128,
 		.page_size = 256,
 		.pages_per_sector = 1024,
 		.nr_sectors = 64,
 		.name = "M25P128",
 	},
 };

 static int stmicro_wait_ready(struct spi_flash *flash, unsigned long timeout)
 {
 	struct spi_slave *spi = flash->spi;
 	unsigned long timebase;
 	int ret;
 	u8 cmd = CMD_M25PXX_RDSR;
 	u8 status;

 	ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
 	if (ret) {
 		debug("SF: Failed to send command %02x: %d\n", cmd, ret);
 		return ret;
 	}

 	timebase = get_timer(0);
 	do {
 		ret = spi_xfer(spi, 8, NULL, &status, 0);
 		if (ret)
 			return -1;

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

 	} while (get_timer(timebase) < timeout);

 	spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);

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

 	/* Timed out */
 	return -1;
 }

 static int stmicro_read_fast(struct spi_flash *flash,
 			     u32 offset, size_t len, void *buf)
 {
 	struct stmicro_spi_flash *stm = to_stmicro_spi_flash(flash);
 	unsigned long page_addr;
 	unsigned long page_size;
 	u8 cmd[5];

 	page_size = stm->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;

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

 static int stmicro_write(struct spi_flash *flash,
 			 u32 offset, size_t len, const void *buf)
 {
 	struct stmicro_spi_flash *stm = to_stmicro_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 = stm->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_M25PXX_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_M25PXX_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: STMicro Page Program failed\n");
 			break;
 		}

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

 		page_addr++;
 		byte_addr = 0;
 	}

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

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

 int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
 	struct stmicro_spi_flash *stm = to_stmicro_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 = stm->params->page_size * stm->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_M25PXX_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_M25PXX_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: STMicro page erase failed\n");
 			break;
 		}

 		ret = stmicro_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
 		if (ret < 0) {
 			debug("SF: STMicro page erase timed out\n");
 			break;
 		}
 	}

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

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

 struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
 {
 	const struct stmicro_spi_flash_params *params;
 	struct stmicro_spi_flash *stm;
 	unsigned int i;

 	for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) {
 		params = &stmicro_spi_flash_table[i];
 		if (params->idcode1 == idcode[2]) {
 			break;
 		}
 	}

 	if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
 		debug("SF: Unsupported STMicro ID %02x\n", idcode[1]);
 		return NULL;
 	}

 	stm = malloc(sizeof(struct stmicro_spi_flash));
 	if (!stm) {
 		debug("SF: Failed to allocate memory\n");
 		return NULL;
 	}

 	stm->params = params;
 	stm->flash.spi = spi;
 	stm->flash.name = params->name;

 	stm->flash.write = stmicro_write;
 	stm->flash.erase = stmicro_erase;
 	stm->flash.read = stmicro_read_fast;
 	stm->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, stm->flash.size);

 	return &stm->flash;
 }
	/*
	* (C) Copyright 2000-2002
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*
	* Copyright 2008, Network Appliance Inc.
	* Jason McMullan <mcmullan@netapp.com>
	*
	* Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
	* TsiChung Liew (Tsi-Chung.Liew@freescale.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"

	/* M25Pxx-specific commands */
	#define CMD_M25PXX_WREN 0x06 /* Write Enable */
	#define CMD_M25PXX_WRDI 0x04 /* Write Disable */
	#define CMD_M25PXX_RDSR 0x05 /* Read Status Register */
	#define CMD_M25PXX_WRSR 0x01 /* Write Status Register */
	#define CMD_M25PXX_READ 0x03 /* Read Data Bytes */
	#define CMD_M25PXX_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
	#define CMD_M25PXX_PP 0x02 /* Page Program */
	#define CMD_M25PXX_SE 0xd8 /* Sector Erase */
	#define CMD_M25PXX_BE 0xc7 /* Bulk Erase */
	#define CMD_M25PXX_DP 0xb9 /* Deep Power-down */
	#define CMD_M25PXX_RES 0xab /* Release from DP, and Read Signature */

	#define STM_ID_M25P16 0x15
	#define STM_ID_M25P20 0x12
	#define STM_ID_M25P32 0x16
	#define STM_ID_M25P40 0x13
	#define STM_ID_M25P64 0x17
	#define STM_ID_M25P80 0x14
	#define STM_ID_M25P128 0x18

	#define STMICRO_SR_WIP (1 << 0) /* Write-in-Progress */

	struct stmicro_spi_flash_params {
	u8 idcode1;
	u16 page_size;
	u16 pages_per_sector;
	u16 nr_sectors;
	const char *name;
	};

	/* spi_flash needs to be first so upper layers can free() it */
	struct stmicro_spi_flash {
	struct spi_flash flash;
	const struct stmicro_spi_flash_params *params;
	};

	static inline struct stmicro_spi_flash *to_stmicro_spi_flash(struct spi_flash
	*flash)
	{
	return container_of(flash, struct stmicro_spi_flash, flash);
	}

	static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
	{
	.idcode1 = STM_ID_M25P16,
	.page_size = 256,
	.pages_per_sector = 256,
	.nr_sectors = 32,
	.name = "M25P16",
	},
	{
	.idcode1 = STM_ID_M25P20,
	.page_size = 256,
	.pages_per_sector = 256,
	.nr_sectors = 4,
	.name = "M25P20",
	},
	{
	.idcode1 = STM_ID_M25P32,
	.page_size = 256,
	.pages_per_sector = 256,
	.nr_sectors = 64,
	.name = "M25P32",
	},
	{
	.idcode1 = STM_ID_M25P40,
	.page_size = 256,
	.pages_per_sector = 256,
	.nr_sectors = 8,
	.name = "M25P40",
	},
	{
	.idcode1 = STM_ID_M25P64,
	.page_size = 256,
	.pages_per_sector = 256,
	.nr_sectors = 128,
	.name = "M25P64",
	},
	{
	.idcode1 = STM_ID_M25P80,
	.page_size = 256,
	.pages_per_sector = 256,
	.nr_sectors = 16,
	.name = "M25P80",
	},
	{
	.idcode1 = STM_ID_M25P128,
	.page_size = 256,
	.pages_per_sector = 1024,
	.nr_sectors = 64,
	.name = "M25P128",
	},
	};

	static int stmicro_wait_ready(struct spi_flash *flash, unsigned long timeout)
	{
	struct spi_slave *spi = flash->spi;
	unsigned long timebase;
	int ret;
	u8 cmd = CMD_M25PXX_RDSR;
	u8 status;

	ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
	if (ret) {
	debug("SF: Failed to send command %02x: %d\n", cmd, ret);
	return ret;
	}

	timebase = get_timer(0);
	do {
	ret = spi_xfer(spi, 8, NULL, &status, 0);
	if (ret)
	return -1;

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

	} while (get_timer(timebase) < timeout);

	spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);

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

	/* Timed out */
	return -1;
	}

	static int stmicro_read_fast(struct spi_flash *flash,
	u32 offset, size_t len, void *buf)
	{
	struct stmicro_spi_flash *stm = to_stmicro_spi_flash(flash);
	unsigned long page_addr;
	unsigned long page_size;
	u8 cmd[5];

	page_size = stm->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;

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

	static int stmicro_write(struct spi_flash *flash,
	u32 offset, size_t len, const void *buf)
	{
	struct stmicro_spi_flash *stm = to_stmicro_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 = stm->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_M25PXX_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_M25PXX_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: STMicro Page Program failed\n");
	break;
	}

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

	page_addr++;
	byte_addr = 0;
	}

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

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

	int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len)
	{
	struct stmicro_spi_flash *stm = to_stmicro_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 = stm->params->page_size * stm->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_M25PXX_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_M25PXX_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: STMicro page erase failed\n");
	break;
	}

	ret = stmicro_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
	if (ret < 0) {
	debug("SF: STMicro page erase timed out\n");
	break;
	}
	}

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

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

	struct spi_flash spi_flash_probe_stmicro(struct spi_slave spi, u8 * idcode)
	{
	const struct stmicro_spi_flash_params *params;
	struct stmicro_spi_flash *stm;
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) {
	params = &stmicro_spi_flash_table[i];
	if (params->idcode1 == idcode[2]) {
	break;
	}
	}

	if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
	debug("SF: Unsupported STMicro ID %02x\n", idcode[1]);
	return NULL;
	}

	stm = malloc(sizeof(struct stmicro_spi_flash));
	if (!stm) {
	debug("SF: Failed to allocate memory\n");
	return NULL;
	}

	stm->params = params;
	stm->flash.spi = spi;
	stm->flash.name = params->name;

	stm->flash.write = stmicro_write;
	stm->flash.erase = stmicro_erase;
	stm->flash.read = stmicro_read_fast;
	stm->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, stm->flash.size);

	return &stm->flash;
	}