imx: ventana: split read_eeprom into standalone file

Split the read_eeprom function out so that it can be shared (ie with SPL)

Cc: Stefan Roese <sr@denx.de>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Andy Ng <andreas2025@gmail.com>
Cc: Eric Nelson <eric.nelson@boundarydevices.com>
Cc: Tapani Utriainen <tapani@technexion.com>
Cc: Tom Rini <trini@ti.com>

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

board/gateworks/gw_ventana/Makefile

@@ -6,5 +6,5 @@
 # SPDX-License-Identifier:  GPL-2.0+
 #
 
-obj-y  := gw_ventana.o gsc.o
+obj-y  := gw_ventana.o gsc.o eeprom.o
 

board/gateworks/gw_ventana/eeprom.c

@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2014 Gateworks Corporation
+ * Author: Tim Harvey <tharvey@gateworks.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <i2c.h>
+
+#include "gsc.h"
+#include "ventana_eeprom.h"
+
+/* read ventana EEPROM, check for validity, and return baseboard type */
+int
+read_eeprom(int bus, struct ventana_board_info *info)
+{
+	int i;
+	int chksum;
+	char baseboard;
+	int type;
+	unsigned char *buf = (unsigned char *)info;
+
+	memset(info, 0, sizeof(*info));
+
+	/*
+	 * On a board with a missing/depleted backup battery for GSC, the
+	 * board may be ready to probe the GSC before its firmware is
+	 * running.  We will wait here indefinately for the GSC/EEPROM.
+	 */
+	while (1) {
+		if (0 == i2c_set_bus_num(bus) &&
+		    0 == i2c_probe(GSC_EEPROM_ADDR))
+			break;
+		mdelay(1);
+	}
+
+	/* read eeprom config section */
+	if (gsc_i2c_read(GSC_EEPROM_ADDR, 0x00, 1, buf, sizeof(*info))) {
+		puts("EEPROM: Failed to read EEPROM\n");
+		info->model[0] = 0;
+		return GW_UNKNOWN;
+	}
+
+	/* sanity checks */
+	if (info->model[0] != 'G' || info->model[1] != 'W') {
+		puts("EEPROM: Invalid Model in EEPROM\n");
+		info->model[0] = 0;
+		return GW_UNKNOWN;
+	}
+
+	/* validate checksum */
+	for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
+		chksum += buf[i];
+	if ((info->chksum[0] != chksum>>8) ||
+	    (info->chksum[1] != (chksum&0xff))) {
+		puts("EEPROM: Failed EEPROM checksum\n");
+		info->model[0] = 0;
+		return GW_UNKNOWN;
+	}
+
+	/* original GW5400-A prototype */
+	baseboard = info->model[3];
+	if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0)
+		baseboard = '0';
+
+	switch (baseboard) {
+	case '0': /* original GW5400-A prototype */
+		type = GW54proto;
+		break;
+	case '1':
+		type = GW51xx;
+		break;
+	case '2':
+		type = GW52xx;
+		break;
+	case '3':
+		type = GW53xx;
+		break;
+	case '4':
+		type = GW54xx;
+		break;
+	default:
+		printf("EEPROM: Unknown model in EEPROM: %s\n", info->model);
+		type = GW_UNKNOWN;
+		break;
+	}
+	return type;
+}

board/gateworks/gw_ventana/gw_ventana.c

@@ -84,15 +84,6 @@ DECLARE_GLOBAL_DATA_PTR;
  */
 static struct ventana_board_info ventana_info;
 
-enum {
-	GW54proto, /* original GW5400-A prototype */
-	GW51xx,
-	GW52xx,
-	GW53xx,
-	GW54xx,
-	GW_UNKNOWN,
-};
-
 int board_type;
 
 /* UART1: Function varies per baseboard */
@@ -499,84 +490,6 @@ static void setup_display(void)
 }
 #endif /* CONFIG_VIDEO_IPUV3 */
 
-/* read ventana EEPROM, check for validity, and return baseboard type */
-static int
-read_eeprom(void)
-{
-	int i;
-	int chksum;
-	char baseboard;
-	int type;
-	struct ventana_board_info *info = &ventana_info;
-	unsigned char *buf = (unsigned char *)&ventana_info;
-
-	memset(info, 0, sizeof(ventana_info));
-
-	/*
-	 * On a board with a missing/depleted backup battery for GSC, the
-	 * board may be ready to probe the GSC before its firmware is
-	 * running.  We will wait here indefinately for the GSC/EEPROM.
-	 */
-	while (1) {
-		if (0 == i2c_set_bus_num(I2C_GSC) &&
-		    0 == i2c_probe(GSC_EEPROM_ADDR))
-			break;
-		mdelay(1);
-	}
-
-	/* read eeprom config section */
-	if (gsc_i2c_read(GSC_EEPROM_ADDR, 0x00, 1, buf, sizeof(ventana_info))) {
-		puts("EEPROM: Failed to read EEPROM\n");
-		info->model[0] = 0;
-		return GW_UNKNOWN;
-	}
-
-	/* sanity checks */
-	if (info->model[0] != 'G' || info->model[1] != 'W') {
-		puts("EEPROM: Invalid Model in EEPROM\n");
-		info->model[0] = 0;
-		return GW_UNKNOWN;
-	}
-
-	/* validate checksum */
-	for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
-		chksum += buf[i];
-	if ((info->chksum[0] != chksum>>8) ||
-	    (info->chksum[1] != (chksum&0xff))) {
-		puts("EEPROM: Failed EEPROM checksum\n");
-		info->model[0] = 0;
-		return GW_UNKNOWN;
-	}
-
-	/* original GW5400-A prototype */
-	baseboard = info->model[3];
-	if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0)
-		baseboard = '0';
-
-	switch (baseboard) {
-	case '0': /* original GW5400-A prototype */
-		type = GW54proto;
-		break;
-	case '1':
-		type = GW51xx;
-		break;
-	case '2':
-		type = GW52xx;
-		break;
-	case '3':
-		type = GW53xx;
-		break;
-	case '4':
-		type = GW54xx;
-		break;
-	default:
-		printf("EEPROM: Unknown model in EEPROM: %s\n", info->model);
-		type = GW_UNKNOWN;
-		break;
-	}
-	return type;
-}
-
 /*
  * Baseboard specific GPIO
  */
@@ -1114,7 +1027,7 @@ int board_init(void)
 	setup_sata();
 #endif
 	/* read Gateworks EEPROM into global struct (used later) */
-	board_type = read_eeprom();
+	board_type = read_eeprom(I2C_GSC, &ventana_info);
 
 	/* board-specifc GPIO iomux */
 	if (board_type < GW_UNKNOWN) {

board/gateworks/gw_ventana/ventana_eeprom.h

@@ -103,4 +103,15 @@ enum {
 	EECONFIG_RES15,
 };
 
+enum {
+	GW54proto, /* original GW5400-A prototype */
+	GW51xx,
+	GW52xx,
+	GW53xx,
+	GW54xx,
+	GW_UNKNOWN,
+};
+
+int read_eeprom(int bus, struct ventana_board_info *);
+
 #endif