[6/6] 4BA: Progress visualization for long read, writes and erases

diff --git a/cli_output.c b/cli_output.c
index feafbd2017b1..cb82fa1a64f6 100644
--- a/cli_output.c
+++ b/cli_output.c
@@ -90,7 +90,8 @@  int print(enum msglevel level, const char *fmt, ...)
 			fflush(output_type);
 	}
 #ifndef STANDALONE
-	if ((level <= verbose_logfile) && logfile) {
+	/* skip of msgs starting from '\b' added to skip progress percents */
+	if ((level <= verbose_logfile) && logfile && (!fmt || fmt[0] != '\b')) {
 		va_start(ap, fmt);
 		ret = vfprintf(logfile, fmt, ap);
 		va_end(ap);
diff --git a/flash.h b/flash.h
index 7f79387a9251..0b72439f5ec9 100644
--- a/flash.h
+++ b/flash.h
@@ -360,6 +360,11 @@  __attribute__((format(printf, 2, 3)));
 #define msg_pspew(...)	print(MSG_SPEW, __VA_ARGS__)	/* programmer debug spew  */
 #define msg_cspew(...)	print(MSG_SPEW, __VA_ARGS__)	/* chip debug spew  */
 
+/* Read progress will be shown for reads more than 256KB */
+#define MIN_LENGTH_TO_SHOW_READ_PROGRESS 256 * 1024
+/* Read progress will be shown for erases and writes more than 64KB */
+#define MIN_LENGTH_TO_SHOW_ERASE_AND_WRITE_PROGRESS 64 * 1024
+
 /* layout.c */
 int register_include_arg(char *name);
 int process_include_args(void);
diff --git a/flashrom.c b/flashrom.c
index 6a6f5b6f6af8..28b177b0199b 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -1527,6 +1527,17 @@  static int walk_eraseregions(struct flashctx *flash, int erasefunction,
 	unsigned int start = 0;
 	unsigned int len;
 	struct block_eraser eraser = flash->chip->block_erasers[erasefunction];
+	int show_progress = 0;
+	unsigned int percent_last, percent_current;
+	unsigned long size = flash->chip->total_size * 1024;
+
+	/* progress visualizaion init */
+	if(size >= MIN_LENGTH_TO_SHOW_ERASE_AND_WRITE_PROGRESS) {
+		msg_cinfo(" "); /* only this space will go to logfile but all strings with \b wont. */
+		msg_cinfo("\b 0%%");
+		percent_last = percent_current = 0;
+		show_progress = 1; /* enable progress visualizaion */
+	}
 
 	for (i = 0; i < NUM_ERASEREGIONS; i++) {
 		/* count==0 for all automatically initialized array
@@ -1544,8 +1555,20 @@  static int walk_eraseregions(struct flashctx *flash, int erasefunction,
 				return 1;
 			}
 			start += len;
+
+			if(show_progress) {
+				percent_current = (unsigned int) ((unsigned long long)start * 100 / size);
+				if(percent_current != percent_last) {
+					msg_cinfo("\b\b\b%2d%%", percent_current);
+					percent_last = percent_current;
+				}
+			}
 		}
 	}
+
+	if(show_progress)
+		msg_cinfo("\b\b\b\b"); /* remove progress percents from the screen */
+
 	msg_cdbg("\n");
 	return 0;
 }
diff --git a/spi25.c b/spi25.c
index b38c7444e873..93c4befacdc1 100644
--- a/spi25.c
+++ b/spi25.c
@@ -949,6 +949,16 @@  int spi_read_chunked(struct flashctx *flash, uint8_t *buf, unsigned int start,
 	int rc = 0;
 	unsigned int i, j, starthere, lenhere, toread;
 	unsigned int page_size = flash->chip->page_size;
+	int show_progress = 0;
+	unsigned int percent_last, percent_current;
+
+	/* progress visualizaion init */
+	if(len >= MIN_LENGTH_TO_SHOW_READ_PROGRESS) {
+		msg_cinfo(" "); /* only this space will go to logfile but all strings with \b wont. */
+		msg_cinfo("\b 0%%");
+		percent_last = percent_current = 0;
+		show_progress = 1; /* enable progress visualizaion */
+	}
 
 	/* Warning: This loop has a very unusual condition and body.
 	 * The loop needs to go through each page with at least one affected
@@ -976,8 +986,20 @@  int spi_read_chunked(struct flashctx *flash, uint8_t *buf, unsigned int start,
 		}
 		if (rc)
 			break;
+
+		if(show_progress) {
+			percent_current = (unsigned int) ((unsigned long long)(starthere +
+									lenhere - start) * 100 / len);
+			if(percent_current != percent_last) {
+				msg_cinfo("\b\b\b%2d%%", percent_current);
+				percent_last = percent_current;
+			}
+		}
 	}
 
+	if(show_progress && !rc)
+		msg_cinfo("\b\b\b\b"); /* remove progress percents from the screen */
+
 	return rc;
 }