4BA: Flashrom integration for the 4-bytes addressing extensions

This patch integrates code of the previous patch into Flashrom's code.
All the integrations is around 3 functions spi_nbyte_read, spi_nbyte_program
and spi_byte_program. After this patch then are not static and can be called
by their pointers saved in flashchips array. Also I added to flashrom.c some
code to switch a chip to 4-bytes addressing mode. And one error message is
corrected in spi.c because it's not suitable for 32-bit addresses.

Patched files
-------------
flash.h
+ added set of 4-bytes address functions to flashchip structure definition

flashrom.c
+ added switch to 4-bytes addressing more for chips which support it

serprog.c
+ added 4-bytes addressing spi_nbyte_read call to serprog_spi_read

spi.c
+ fixed flash chip size check in spi_chip_read

spi25.c
+ added 4-bytes addressing spi_nbyte_read call to spi_read_chunked
+ added 4-bytes addressing spi_nbyte_program call to spi_write_chunked
+ added 4-bytes addressing spi_byte_program call to spi_chip_write_1

Signed-off-by: Boris Baykov <dev@borisbaykov.com>, Russia, Jan 2014
[clg: ported from
      https://www.flashrom.org/pipermail/flashrom/2015-January/013205.html ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>

1 files changed, 12 insertions, 3 deletions

diff --git a/spi25.c b/spi25.c
index af4b6db..b38c744 100644
--- a/spi25.c
+++ b/spi25.c
@@ -28,6 +28,7 @@
 #include "chipdrivers.h"
 #include "programmer.h"
 #include "spi.h"
+#include "spi4ba.h"
 
 static int spi_rdid(struct flashctx *flash, unsigned char *readarr, int bytes)
 {
@@ -966,7 +967,10 @@ int spi_read_chunked(struct flashctx *flash, uint8_t *buf, unsigned int start,
 		lenhere = min(start + len, (i + 1) * page_size) - starthere;
 		for (j = 0; j < lenhere; j += chunksize) {
 			toread = min(chunksize, lenhere - j);
-			rc = spi_nbyte_read(flash, starthere + j, buf + starthere - start + j, toread);
+			rc = (flash->chip->feature_bits & FEATURE_4BA_SUPPORT) == 0
+				? spi_nbyte_read(flash, starthere + j, buf + starthere - start + j, toread)
+				: flash->chip->four_bytes_addr_funcs.read_nbyte(flash, starthere + j,
+					buf + starthere - start + j, toread);
 			if (rc)
 				break;
 		}
@@ -1011,7 +1015,10 @@ int spi_write_chunked(struct flashctx *flash, const uint8_t *buf, unsigned int s
 		lenhere = min(start + len, (i + 1) * page_size) - starthere;
 		for (j = 0; j < lenhere; j += chunksize) {
 			towrite = min(chunksize, lenhere - j);
-			rc = spi_nbyte_program(flash, starthere + j, buf + starthere - start + j, towrite);
+			rc = (flash->chip->feature_bits & FEATURE_4BA_SUPPORT) == 0
+				? spi_nbyte_program(flash, starthere + j, buf + starthere - start + j, towrite)
+				: flash->chip->four_bytes_addr_funcs.program_nbyte(flash, starthere + j,
+					buf + starthere - start + j, towrite);
 			if (rc)
 				break;
 			while (spi_read_status_register(flash) & SPI_SR_WIP)
@@ -1037,7 +1044,9 @@ int spi_chip_write_1(struct flashctx *flash, const uint8_t *buf, unsigned int st
 	int result = 0;
 
 	for (i = start; i < start + len; i++) {
-		result = spi_byte_program(flash, i, buf[i - start]);
+		result = (flash->chip->feature_bits & FEATURE_4BA_SUPPORT) == 0
+			? spi_byte_program(flash, i, buf[i - start])
+			: flash->chip->four_bytes_addr_funcs.program_byte(flash, i, buf[i - start]);
 		if (result)
 			return 1;
 		while (spi_read_status_register(flash) & SPI_SR_WIP)