tools/kwbimage: add BAUDRATE option

Offset 0x18 in some Marvell datasheets this field is redacted as
"reserved". This offset is actually a set of options and bits 2:0 allow
the selection of the UART baudrate.

Allow a BAUDRATE option to set the UART baudrate for any messages coming
from the BootROM firmware.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Signed-off-by: Stefan Roese <sr@denx.de>

tools/kwbimage.c

@@ -68,6 +68,7 @@ struct image_cfg_element {
 		IMAGE_CFG_BINARY,
 		IMAGE_CFG_PAYLOAD,
 		IMAGE_CFG_DATA,
+		IMAGE_CFG_BAUDRATE,
 	} type;
 	union {
 		unsigned int version;
@@ -85,6 +86,7 @@ struct image_cfg_element {
 		unsigned int nandeccmode;
 		unsigned int nandpagesz;
 		struct ext_hdr_v0_reg regdata;
+		unsigned int baudrate;
 	};
 };
 
@@ -195,6 +197,28 @@ static uint32_t image_checksum32(void *start, uint32_t len)
 	return csum;
 }
 
+static uint8_t baudrate_to_option(unsigned int baudrate)
+{
+	switch (baudrate) {
+	case 2400:
+		return MAIN_HDR_V1_OPT_BAUD_2400;
+	case 4800:
+		return MAIN_HDR_V1_OPT_BAUD_4800;
+	case 9600:
+		return MAIN_HDR_V1_OPT_BAUD_9600;
+	case 19200:
+		return MAIN_HDR_V1_OPT_BAUD_19200;
+	case 38400:
+		return MAIN_HDR_V1_OPT_BAUD_38400;
+	case 57600:
+		return MAIN_HDR_V1_OPT_BAUD_57600;
+	case 115200:
+		return MAIN_HDR_V1_OPT_BAUD_115200;
+	default:
+		return MAIN_HDR_V1_OPT_BAUD_DEFAULT;
+	}
+}
+
 static void *image_create_v0(size_t *imagesz, struct image_tool_params *params,
 			     int payloadsz)
 {
@@ -398,6 +422,9 @@ static void *image_create_v1(size_t *imagesz, struct image_tool_params *params,
 	e = image_find_option(IMAGE_CFG_NAND_BADBLK_LOCATION);
 	if (e)
 		main_hdr->nandbadblklocation = e->nandbadblklocation;
+	e = image_find_option(IMAGE_CFG_BAUDRATE);
+	if (e)
+		main_hdr->options = baudrate_to_option(e->baudrate);
 
 	binarye = image_find_option(IMAGE_CFG_BINARY);
 	if (binarye) {
@@ -548,6 +575,10 @@ static int image_create_config_parse_oneline(char *line,
 		el->type = IMAGE_CFG_DATA;
 		el->regdata.raddr = strtoul(value1, NULL, 16);
 		el->regdata.rdata = strtoul(value2, NULL, 16);
+	} else if (!strcmp(keyword, "BAUDRATE")) {
+		char *value = strtok_r(NULL, deliminiters, &saveptr);
+		el->type = IMAGE_CFG_BAUDRATE;
+		el->baudrate = strtoul(value, NULL, 10);
 	} else {
 		fprintf(stderr, "Ignoring unknown line '%s'\n", line);
 	}

tools/kwbimage.h

@@ -82,7 +82,7 @@ struct main_hdr_v1 {
 	uint32_t srcaddr;               /* C-F */
 	uint32_t destaddr;              /* 10-13 */
 	uint32_t execaddr;              /* 14-17 */
-	uint8_t  reserved3;             /* 18 */
+	uint8_t  options;               /* 18 */
 	uint8_t  nandblocksize;         /* 19 */
 	uint8_t  nandbadblklocation;    /* 1A */
 	uint8_t  reserved4;             /* 1B */
@@ -92,6 +92,18 @@ struct main_hdr_v1 {
 };
 
 /*
+ * Main header options
+ */
+#define MAIN_HDR_V1_OPT_BAUD_DEFAULT	0
+#define MAIN_HDR_V1_OPT_BAUD_2400	0x1
+#define MAIN_HDR_V1_OPT_BAUD_4800	0x2
+#define MAIN_HDR_V1_OPT_BAUD_9600	0x3
+#define MAIN_HDR_V1_OPT_BAUD_19200	0x4
+#define MAIN_HDR_V1_OPT_BAUD_38400	0x5
+#define MAIN_HDR_V1_OPT_BAUD_57600	0x6
+#define MAIN_HDR_V1_OPT_BAUD_115200	0x7
+
+/*
  * Header for the optional headers, version 1 (Armada 370, Armada XP)
  */
 struct opt_hdr_v1 {