[coreboot] [flashrom] [patch] Replace chip_readb in a loop with chip_readn in jedec.c

[Urja Rannikko]

Replace calls to chip_readb in a loop with chip_readn in jedec.c.

Signed-off-by: Urja Rannikko

---

patch inlined too:
Index: jedec.c
===================================================================
--- jedec.c	(revision 580)
+++ jedec.c	(working copy)
@@ -21,6 +21,9 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */

+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
 #include "flash.h"

#define MAX_REFLASH_TRIES 0x10
@@ -251,6 +254,7 @@
    int i, tried = 0, start_index = 0, ok;
    chipaddr d = dst;
    uint8_t *s = src;
+	uint8_t *tmpbuf = NULL;

retry:
    /* Issue JEDEC Data Unprotect comand */
@@ -272,14 +276,14 @@
    dst = d;
    src = s;
    ok = 1;
-	for (i = 0; i < page_size; i++) {
-		if (chip_readb(dst) != *src) {
-			ok = 0;
-			break;
+	tmpbuf = malloc(page_size);
+	if (!tmpbuf) {
+		fprintf(stderr,"Error: cannot allocate memory\n");
+		exit(1);
    	}
-		dst++;
-		src++;
-	}
+	chip_readn(tmpbuf,dst,page_size);
+	if (memcmp(tmpbuf,src,page_size) != 0) ok = 0;
+	free(tmpbuf);

if (!ok && tried++ < MAX_REFLASH_TRIES) {
    	start_index = i;
@@ -341,15 +345,29 @@
    int total_size = flash->total_size * 1024;
    int page_size = flash->page_size;
    chipaddr bios = flash->virtual_memory;
+	uint8_t *tmpbuf;

erase_chip_jedec(flash);
    // dumb check if erase was successful.
-	for (i = 0; i < total_size; i++) {
-		if (chip_readb(bios + i) != 0xff) {
-			printf("ERASE FAILED @%d, val %02x!\n", i, chip_readb(bios + i));
-			return -1;
+	// We'll do that in page_size chunks to detect failure earlier on slow links
+
+	tmpbuf = malloc(page_size);
+	if (!tmpbuf) {
+		fprintf(stderr,"Error: cannot allocate memory\n");
+		exit(1);
    	}
+	for (i = 0; i < total_size; i+=page_size) {
+		int n;
+		chip_readn(tmpbuf,bios+i,page_size);
+		for(n=0;n<page_size;n++) {
+			if (tmpbuf[n] != 0xff) {
+				printf("ERASE FAILED @%d, val %02x!\n", i+n, tmpbuf[n]);
+				free(tmpbuf);
+				return -1;
+			}
+		}
    }
+	free(tmpbuf);

printf("Programming page: ");
    for (i = 0; i < total_size / page_size; i++) {