[flashrom] [PATCH 1/6] 4BA: Basic support for 4-bytes addressing mode extensions
Cédric Le Goater
clg at kaod.org
Sat Jun 11 18:28:59 CEST 2016
From: Boris Baykov <dev at borisbaykov.com>
If flash chip is switched to 4-bytes addressing mode then all
read/erase/program instructions will be switched from 3-bytes mode
to 4-bytes mode. Then well known instructions like 03h (Read),
02h (Program) and 20h,52h,D8h (Erase) will become one byte longer
and accept 4-bytes address instead of 3-bytes.
This patch provides support for well known instructions in 4-bytes
addressing mode. Also here is the code to enter 4-bytes addressing
mode by execute the instruction B7h (Enter 4-bytes mode).
Patched files
-------------
chipdrivers.h
+ added functions declarations for spi4ba.c
flash.h
+ feature definitions added
Makefile
+ added spi4ba.c
Added files
-----------
spi4ba.h
+ definitions for 4-bytes addressing JEDEC commands
+ functions declarations from spi4ba.c (same as in chipdrivers.h, just to see)
spi4ba.c
+ functions for enter 4-bytes addressing mode
+ functions for read/write/erase in 4-bytes addressing mode
Signed-off-by: Boris Baykov <dev at borisbaykov.com>, Russia, Jan 2014
[clg: ported from
https://www.flashrom.org/pipermail/flashrom/2015-January/013199.html ]
Signed-off-by: Cédric Le Goater <clg at kaod.org>
---
Makefile | 2 +-
chipdrivers.h | 10 ++
flash.h | 3 +
spi4ba.c | 327 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
spi4ba.h | 54 ++++++++++
5 files changed, 395 insertions(+), 1 deletion(-)
create mode 100644 spi4ba.c
create mode 100644 spi4ba.h
diff --git a/Makefile b/Makefile
index 4ebde1efbe3f..d7713986008e 100644
--- a/Makefile
+++ b/Makefile
@@ -514,7 +514,7 @@ endif
CHIP_OBJS = jedec.o stm50.o w39.o w29ee011.o \
sst28sf040.o 82802ab.o \
sst49lfxxxc.o sst_fwhub.o flashchips.o spi.o spi25.o spi25_statusreg.o \
- opaque.o sfdp.o en29lv640b.o at45db.o
+ spi4ba.o opaque.o sfdp.o en29lv640b.o at45db.o
###############################################################################
# Library code.
diff --git a/chipdrivers.h b/chipdrivers.h
index c85eac96cc31..dccd1ff92ec1 100644
--- a/chipdrivers.h
+++ b/chipdrivers.h
@@ -195,4 +195,14 @@ int erase_sector_stm50(struct flashctx *flash, unsigned int block, unsigned int
int probe_en29lv640b(struct flashctx *flash);
int write_en29lv640b(struct flashctx *flash, const uint8_t *buf, unsigned int start, unsigned int len);
+/* spi4ba.c */
+int spi_enter_4ba_b7(struct flashctx *flash);
+int spi_enter_4ba_b7_we(struct flashctx *flash);
+int spi_byte_program_4ba(struct flashctx *flash, unsigned int addr, uint8_t databyte);
+int spi_nbyte_program_4ba(struct flashctx *flash, unsigned int addr, const uint8_t *bytes, unsigned int len);
+int spi_nbyte_read_4ba(struct flashctx *flash, unsigned int addr, uint8_t *bytes, unsigned int len);
+int spi_block_erase_20_4ba(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
+int spi_block_erase_52_4ba(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
+int spi_block_erase_d8_4ba(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
+
#endif /* !__CHIPDRIVERS_H__ */
diff --git a/flash.h b/flash.h
index da049d178439..7bd4b1376d40 100644
--- a/flash.h
+++ b/flash.h
@@ -123,6 +123,9 @@ enum write_granularity {
#define FEATURE_WRSR_EITHER (FEATURE_WRSR_EWSR | FEATURE_WRSR_WREN)
#define FEATURE_OTP (1 << 8)
#define FEATURE_QPI (1 << 9)
+/* Feature bits used for 4-bytes addressing mode */
+#define FEATURE_4BA_SUPPORT (1 << 10)
+#define FEATURE_4BA_ONLY (1 << 11)
enum test_state {
OK = 0,
diff --git a/spi4ba.c b/spi4ba.c
new file mode 100644
index 000000000000..72df874275c9
--- /dev/null
+++ b/spi4ba.c
@@ -0,0 +1,327 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright (C) 2014 Boris Baykov
+ *
+ * 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; version 2 of the License.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/*
+ * SPI chip driver functions for 4-bytes addressing
+ */
+
+#include <string.h>
+#include "flash.h"
+#include "chipdrivers.h"
+#include "spi.h"
+#include "programmer.h"
+#include "spi4ba.h"
+
+/* #define MSG_TRACE_4BA_FUNCS 1 */
+
+#ifdef MSG_TRACE_4BA_FUNCS
+#define msg_trace(...) print(MSG_DEBUG, __VA_ARGS__)
+#else
+#define msg_trace(...)
+#endif
+
+/* Enter 4-bytes addressing mode (without sending WREN before) */
+int spi_enter_4ba_b7(struct flashctx *flash)
+{
+ const unsigned char cmd[JEDEC_ENTER_4_BYTE_ADDR_MODE_OUTSIZE] = { JEDEC_ENTER_4_BYTE_ADDR_MODE };
+
+ msg_trace("-> %s\n", __func__);
+
+ /* Switch to 4-bytes addressing mode */
+ return spi_send_command(flash, sizeof(cmd), 0, cmd, NULL);
+}
+
+/* Enter 4-bytes addressing mode with sending WREN before */
+int spi_enter_4ba_b7_we(struct flashctx *flash)
+{
+ int result;
+ struct spi_command cmds[] = {
+ {
+ .writecnt = JEDEC_WREN_OUTSIZE,
+ .writearr = (const unsigned char[]){ JEDEC_WREN },
+ .readcnt = 0,
+ .readarr = NULL,
+ }, {
+ .writecnt = JEDEC_ENTER_4_BYTE_ADDR_MODE_OUTSIZE,
+ .writearr = (const unsigned char[]){ JEDEC_ENTER_4_BYTE_ADDR_MODE },
+ .readcnt = 0,
+ .readarr = NULL,
+ }, {
+ .writecnt = 0,
+ .writearr = NULL,
+ .readcnt = 0,
+ .readarr = NULL,
+ }};
+
+ msg_trace("-> %s\n", __func__);
+
+ /* Switch to 4-bytes addressing mode */
+ result = spi_send_multicommand(flash, cmds);
+ if (result) {
+ msg_cerr("%s failed during command execution\n", __func__);
+ }
+ return result;
+}
+
+/* Program one flash byte from 4-bytes addressing mode */
+int spi_byte_program_4ba(struct flashctx *flash, unsigned int addr,
+ uint8_t databyte)
+{
+ int result;
+ struct spi_command cmds[] = {
+ {
+ .writecnt = JEDEC_WREN_OUTSIZE,
+ .writearr = (const unsigned char[]){ JEDEC_WREN },
+ .readcnt = 0,
+ .readarr = NULL,
+ }, {
+ .writecnt = JEDEC_BYTE_PROGRAM_OUTSIZE + 1,
+ .writearr = (const unsigned char[]){
+ JEDEC_BYTE_PROGRAM,
+ (addr >> 24) & 0xff,
+ (addr >> 16) & 0xff,
+ (addr >> 8) & 0xff,
+ (addr & 0xff),
+ databyte
+ },
+ .readcnt = 0,
+ .readarr = NULL,
+ }, {
+ .writecnt = 0,
+ .writearr = NULL,
+ .readcnt = 0,
+ .readarr = NULL,
+ }};
+
+ msg_trace("-> %s (0x%08X)\n", __func__, addr);
+
+ result = spi_send_multicommand(flash, cmds);
+ if (result) {
+ msg_cerr("%s failed during command execution at address 0x%x\n",
+ __func__, addr);
+ }
+ return result;
+}
+
+/* Program flash bytes from 4-bytes addressing mode */
+int spi_nbyte_program_4ba(struct flashctx *flash, unsigned int addr,
+ const uint8_t *bytes, unsigned int len)
+{
+ int result;
+ unsigned char cmd[(JEDEC_BYTE_PROGRAM_OUTSIZE + 1) - 1 + 256] = {
+ JEDEC_BYTE_PROGRAM,
+ (addr >> 24) & 0xff,
+ (addr >> 16) & 0xff,
+ (addr >> 8) & 0xff,
+ (addr >> 0) & 0xff
+ };
+ struct spi_command cmds[] = {
+ {
+ .writecnt = JEDEC_WREN_OUTSIZE,
+ .writearr = (const unsigned char[]){ JEDEC_WREN },
+ .readcnt = 0,
+ .readarr = NULL,
+ }, {
+ .writecnt = (JEDEC_BYTE_PROGRAM_OUTSIZE + 1) - 1 + len,
+ .writearr = cmd,
+ .readcnt = 0,
+ .readarr = NULL,
+ }, {
+ .writecnt = 0,
+ .writearr = NULL,
+ .readcnt = 0,
+ .readarr = NULL,
+ }};
+
+ msg_trace("-> %s (0x%08X-0x%08X)\n", __func__, addr, addr + len - 1);
+
+ if (!len) {
+ msg_cerr("%s called for zero-length write\n", __func__);
+ return 1;
+ }
+ if (len > 256) {
+ msg_cerr("%s called for too long a write\n", __func__);
+ return 1;
+ }
+
+ memcpy(&cmd[(JEDEC_BYTE_PROGRAM_OUTSIZE + 1) - 1], bytes, len);
+
+ result = spi_send_multicommand(flash, cmds);
+ if (result) {
+ msg_cerr("%s failed during command execution at address 0x%x\n",
+ __func__, addr);
+ }
+ return result;
+}
+
+/* Read flash bytes from 4-bytes addressing mode */
+int spi_nbyte_read_4ba(struct flashctx *flash, unsigned int addr,
+ uint8_t *bytes, unsigned int len)
+{
+ const unsigned char cmd[JEDEC_READ_OUTSIZE + 1] = {
+ JEDEC_READ,
+ (addr >> 24) & 0xff,
+ (addr >> 16) & 0xff,
+ (addr >> 8) & 0xff,
+ (addr >> 0) & 0xff
+ };
+
+ msg_trace("-> %s (0x%08X-0x%08X)\n", __func__, addr, addr + len - 1);
+
+ /* Send Read */
+ return spi_send_command(flash, sizeof(cmd), len, cmd, bytes);
+}
+
+/* Erases 4 KB of flash from 4-bytes addressing mode */
+int spi_block_erase_20_4ba(struct flashctx *flash, unsigned int addr,
+ unsigned int blocklen)
+{
+ int result;
+ struct spi_command cmds[] = {
+ {
+ .writecnt = JEDEC_WREN_OUTSIZE,
+ .writearr = (const unsigned char[]){ JEDEC_WREN },
+ .readcnt = 0,
+ .readarr = NULL,
+ }, {
+ .writecnt = JEDEC_SE_OUTSIZE + 1,
+ .writearr = (const unsigned char[]){
+ JEDEC_SE,
+ (addr >> 24) & 0xff,
+ (addr >> 16) & 0xff,
+ (addr >> 8) & 0xff,
+ (addr & 0xff)
+ },
+ .readcnt = 0,
+ .readarr = NULL,
+ }, {
+ .writecnt = 0,
+ .writearr = NULL,
+ .readcnt = 0,
+ .readarr = NULL,
+ }};
+
+ msg_trace("-> %s (0x%08X-0x%08X)\n", __func__, addr, addr + blocklen - 1);
+
+ result = spi_send_multicommand(flash, cmds);
+ if (result) {
+ msg_cerr("%s failed during command execution at address 0x%x\n",
+ __func__, addr);
+ return result;
+ }
+ /* Wait until the Write-In-Progress bit is cleared.
+ * This usually takes 15-800 ms, so wait in 10 ms steps.
+ */
+ while (spi_read_status_register(flash) & SPI_SR_WIP)
+ programmer_delay(10 * 1000);
+ /* FIXME: Check the status register for errors. */
+ return 0;
+}
+
+/* Erases 32 KB of flash from 4-bytes addressing mode */
+int spi_block_erase_52_4ba(struct flashctx *flash, unsigned int addr,
+ unsigned int blocklen)
+{
+ int result;
+ struct spi_command cmds[] = {
+ {
+ .writecnt = JEDEC_WREN_OUTSIZE,
+ .writearr = (const unsigned char[]){ JEDEC_WREN },
+ .readcnt = 0,
+ .readarr = NULL,
+ }, {
+ .writecnt = JEDEC_BE_52_OUTSIZE + 1,
+ .writearr = (const unsigned char[]){
+ JEDEC_BE_52,
+ (addr >> 24) & 0xff,
+ (addr >> 16) & 0xff,
+ (addr >> 8) & 0xff,
+ (addr & 0xff)
+ },
+ .readcnt = 0,
+ .readarr = NULL,
+ }, {
+ .writecnt = 0,
+ .writearr = NULL,
+ .readcnt = 0,
+ .readarr = NULL,
+ }};
+
+ msg_trace("-> %s (0x%08X-0x%08X)\n", __func__, addr, addr + blocklen - 1);
+
+ result = spi_send_multicommand(flash, cmds);
+ if (result) {
+ msg_cerr("%s failed during command execution at address 0x%x\n",
+ __func__, addr);
+ return result;
+ }
+ /* Wait until the Write-In-Progress bit is cleared.
+ * This usually takes 100-4000 ms, so wait in 100 ms steps.
+ */
+ while (spi_read_status_register(flash) & SPI_SR_WIP)
+ programmer_delay(100 * 1000);
+ /* FIXME: Check the status register for errors. */
+ return 0;
+}
+
+/* Erases 64 KB of flash from 4-bytes addressing mode */
+int spi_block_erase_d8_4ba(struct flashctx *flash, unsigned int addr,
+ unsigned int blocklen)
+{
+ int result;
+ struct spi_command cmds[] = {
+ {
+ .writecnt = JEDEC_WREN_OUTSIZE,
+ .writearr = (const unsigned char[]){ JEDEC_WREN },
+ .readcnt = 0,
+ .readarr = NULL,
+ }, {
+ .writecnt = JEDEC_BE_D8_OUTSIZE + 1,
+ .writearr = (const unsigned char[]){
+ JEDEC_BE_D8,
+ (addr >> 24) & 0xff,
+ (addr >> 16) & 0xff,
+ (addr >> 8) & 0xff,
+ (addr & 0xff)
+ },
+ .readcnt = 0,
+ .readarr = NULL,
+ }, {
+ .writecnt = 0,
+ .writearr = NULL,
+ .readcnt = 0,
+ .readarr = NULL,
+ }};
+
+ msg_trace("-> %s (0x%08X-0x%08X)\n", __func__, addr, addr + blocklen - 1);
+
+ result = spi_send_multicommand(flash, cmds);
+ if (result) {
+ msg_cerr("%s failed during command execution at address 0x%x\n",
+ __func__, addr);
+ return result;
+ }
+ /* Wait until the Write-In-Progress bit is cleared.
+ * This usually takes 100-4000 ms, so wait in 100 ms steps.
+ */
+ while (spi_read_status_register(flash) & SPI_SR_WIP)
+ programmer_delay(100 * 1000);
+ /* FIXME: Check the status register for errors. */
+ return 0;
+}
diff --git a/spi4ba.h b/spi4ba.h
new file mode 100644
index 000000000000..15feecb40802
--- /dev/null
+++ b/spi4ba.h
@@ -0,0 +1,54 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright (C) 2014 Boris Baykov
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+/*
+ * JEDEC flash chips instructions for 4-bytes addressing
+ * SPI chip driver functions for 4-bytes addressing
+ */
+
+#ifndef __SPI_4BA_H__
+#define __SPI_4BA_H__ 1
+
+/* Enter 4-byte Address Mode */
+#define JEDEC_ENTER_4_BYTE_ADDR_MODE 0xB7
+#define JEDEC_ENTER_4_BYTE_ADDR_MODE_OUTSIZE 0x01
+#define JEDEC_ENTER_4_BYTE_ADDR_MODE_INSIZE 0x00
+
+/* Exit 4-byte Address Mode */
+#define JEDEC_EXIT_4_BYTE_ADDR_MODE 0xE9
+#define JEDEC_EXIT_4_BYTE_ADDR_MODE_OUTSIZE 0x01
+#define JEDEC_EXIT_4_BYTE_ADDR_MODE_INSIZE 0x00
+
+/* enter 4-bytes addressing mode */
+int spi_enter_4ba_b7(struct flashctx *flash);
+int spi_enter_4ba_b7_we(struct flashctx *flash);
+
+/* read/write flash bytes in 4-bytes addressing mode */
+int spi_byte_program_4ba(struct flashctx *flash, unsigned int addr, uint8_t databyte);
+int spi_nbyte_program_4ba(struct flashctx *flash, unsigned int addr, const uint8_t *bytes, unsigned int len);
+int spi_nbyte_read_4ba(struct flashctx *flash, unsigned int addr, uint8_t *bytes, unsigned int len);
+
+/* erase flash bytes in 4-bytes addressing mode */
+int spi_block_erase_20_4ba(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
+int spi_block_erase_52_4ba(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
+int spi_block_erase_d8_4ba(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
+
+
+#endif /* __SPI_4BA_H__ */
--
2.1.4
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