Change in flashrom[master]: realtek_mst_i2c_spi.c: Update PAGE_SIZE and fix write

[Shiyu Sun (Code Review)]

Shiyu Sun has uploaded this change for review. ( https://review.coreboot.org/c/flashrom/+/48840 )

Change subject: realtek_mst_i2c_spi.c: Update PAGE_SIZE and fix write
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realtek_mst_i2c_spi.c: Update PAGE_SIZE and fix write

Update the PAGE_SIZE to 128 as fix r/w on different devices,
also fix the write page mapping for it.

BUG=b:147402710
TEST=build and run flashrom to read&write on multiple devices

Signed-off-by: Shiyu Sun 
Change-Id: Ifcdd3548519eb37440e67fcf6206279cff05b159
---
M Makefile
M realtek_mst_i2c_spi.c
2 files changed, 5 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/40/48840/1

diff --git a/Makefile b/Makefile
index 0498624..a79bb82 100644
--- a/Makefile
+++ b/Makefile
@@ -737,10 +737,10 @@
 CONFIG_STLINKV3_SPI ?= yes

# Disables LSPCON support until the i2c helper supports multiple systems.
-CONFIG_LSPCON_I2C_SPI ?= no
+CONFIG_LSPCON_I2C_SPI ?= yes

# Disables REALTEK_MST support until the i2c helper supports multiple systems.
-CONFIG_REALTEK_MST_I2C_SPI ?= no
+CONFIG_REALTEK_MST_I2C_SPI ?= yes

# Always enable dummy tracing for now.
 CONFIG_DUMMY ?= yes
diff --git a/realtek_mst_i2c_spi.c b/realtek_mst_i2c_spi.c
index 80caf86..dabec70 100644
--- a/realtek_mst_i2c_spi.c
+++ b/realtek_mst_i2c_spi.c
@@ -28,7 +28,7 @@

#define MCU_I2C_SLAVE_ADDR 0x94
 #define REGISTER_ADDRESS	(0x94 >> 1)
-#define PAGE_SIZE		256
+#define PAGE_SIZE		128
 #define MAX_SPI_WAIT_RETRIES	1000

#define MCU_MODE 0x6F
@@ -386,7 +386,8 @@
    		ret |= realtek_mst_i2c_spi_write_register(fd, 0x71, page_len-1);
    	uint8_t block_idx = (start + i) >> 16;
    	uint8_t page_idx  = (start + i) >>  8;
-		ret |= realtek_mst_i2c_spi_map_page(fd, block_idx, page_idx, 0);
+		uint8_t byte_idx = start + i;
+		ret |= realtek_mst_i2c_spi_map_page(fd, block_idx, page_idx, byte_idx);
    	if (ret)
    		break;