Change in flashrom[master]: Change-Id: Ie4a07499ec5ef0af23818593f45dc427285a9e8a

[Simon Buhrow (Code Review)]

Simon Buhrow has uploaded this change for review. ( https://review.coreboot.org/c/flashrom/+/40521 )

Change subject: Change-Id: Ie4a07499ec5ef0af23818593f45dc427285a9e8a
......................................................................

Change-Id: Ie4a07499ec5ef0af23818593f45dc427285a9e8a

Change-Id: I218856c79844b31b302ec06f03db5599d274712e
---
M ft2232_spi.c
1 file changed, 19 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/21/40521/1

diff --git a/ft2232_spi.c b/ft2232_spi.c
index 520eb6e..9017a0f 100644
--- a/ft2232_spi.c
+++ b/ft2232_spi.c
@@ -398,7 +398,10 @@
    	msg_perr("Unable to set latency timer (%s).\n", ftdi_get_error_string(ftdic));
    }

-	if (ftdi_write_data_set_chunksize(ftdic, 270)) {
+	if (ftdi_write_data_set_chunksize(ftdic, 280)) {
+	/* 280 Byte = (9 Byte CMD + 1 Byte WREN) + (9 Byte CMD + 1 Byte op) + 4 Byte Addr
+	 * 				+ 256 Byte PageWrite-data
+		with op: PageProgram or Erase; CMD: FTDI-Chip commands*/
    	msg_perr("Unable to set chunk size (%s).\n", ftdi_get_error_string(ftdic));
    }

@@ -467,7 +470,8 @@
    struct ftdi_context *ftdic = &ftdic_context;
    static unsigned char *buf = NULL;
    /* failed is special. We use bitwise ops, but it is essentially bool. */
-	int i = 0, ret = 0, failed = 0;
+	static int i = 0;
+	int ret = 0, failed = 0;
    int bufsize;
    static int oldbufsize = 0;

@@ -475,7 +479,10 @@
    	return SPI_INVALID_LENGTH;

/* buf is not used for the response from the chip. */
-	bufsize = max(writecnt + 9, 260 + 9);
+	bufsize = max(writecnt + 9, 280);
+	/* 280 Byte = (9 Byte CMD + 1 Byte WREN) + (9 Byte CMD + 1 Byte op) + 4 Byte Addr
+	 *			+ 256 Byte PageWrite-data
+	 * with op: PageProgram or Erase; CMD: FTDI-Chip commands*/
    /* Never shrink. realloc() calls are expensive. */
    if (bufsize > oldbufsize) {
    	buf = realloc(buf, bufsize);
@@ -538,7 +545,15 @@
    buf[i++] = SET_BITS_LOW;
    buf[i++] = cs_bits;
    buf[i++] = pindir;
-	ret = send_buf(ftdic, buf, i);
+
+	if (writearr[0] == JEDEC_WREN) {
+		/* Return to get second op (Program or Erase) without resetting buf nor i*/
+		return 0;
+	} else {
+		ret = send_buf(ftdic, buf, i);
+		i = 0;
+	}
+
    failed |= ret;
    if (ret)
    	msg_perr("send_buf failed at end: %i\n", ret);