From 890880583d84607e36b52a785a96b167728bbf73 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Andreas=20Bie=C3=9Fmann?= <andreas.biessmann@corscience.de>
Date: Fri, 6 Sep 2013 15:04:53 +0200
Subject: [PATCH] tricorder: panic() on unknown board
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Also hang() the board on panic().

Signed-off-by: Andreas Bießmann <andreas.biessmann@corscience.de>
---
 board/corscience/tricorder/tricorder.c | 77 ++++++++++++++++++++++++++
 include/configs/tricorder.h            |  7 +++
 2 files changed, 84 insertions(+)

diff --git a/board/corscience/tricorder/tricorder.c b/board/corscience/tricorder/tricorder.c
index c7099e5e3a..b8129168b9 100644
--- a/board/corscience/tricorder/tricorder.c
+++ b/board/corscience/tricorder/tricorder.c
@@ -13,11 +13,13 @@
 #include <common.h>
 #include <twl4030.h>
 #include <asm/io.h>
+#include <asm/gpio.h>
 #include <asm/arch/mmc_host_def.h>
 #include <asm/arch/mux.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/arch/mem.h>
 #include "tricorder.h"
+#include "tricorder-eeprom.h"
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -34,12 +36,87 @@ int board_init(void)
 	return 0;
 }
 
+/**
+ * get_eeprom - read the eeprom
+ *
+ * @eeprom - pointer to a eeprom struct to fill
+ *
+ * This function will panic() on wrong EEPROM content
+ */
+static void get_eeprom(struct tricorder_eeprom *eeprom)
+{
+	int ret;
+
+	if (!eeprom)
+		panic("No eeprom given!\n");
+
+	ret = gpio_request(7, "BMS");
+	if (ret)
+		panic("gpio: requesting BMS pin failed\n");
+
+	ret = gpio_direction_input(7);
+	if (ret)
+		panic("gpio: set BMS as input failed\n");
+
+	ret = gpio_get_value(7);
+	if (ret < 0)
+		panic("gpio: get BMS pin state failed\n");
+
+	gpio_free(7);
+
+	if (ret == 0) {
+		/* BMS is _not_ set, do the EEPROM check */
+		ret = tricorder_get_eeprom(0x51, eeprom);
+		if (!ret) {
+			if (strncmp(eeprom->board_name, "CS10411", 7) != 0)
+				panic("Wrong board name '%.*s'\n",
+				      sizeof(eeprom->board_name),
+						eeprom->board_name);
+			if (eeprom->board_version[0] < 'D')
+				panic("Wrong board version '%.*s'\n",
+				      sizeof(eeprom->board_version),
+						eeprom->board_version);
+		} else {
+			panic("Could not get board revision\n");
+		}
+	}
+}
+
+/**
+ * print_hwversion - print out a HW version string
+ *
+ * @eeprom - pointer to the eeprom
+ */
+static void print_hwversion(struct tricorder_eeprom *eeprom)
+{
+	size_t len;
+	if (!eeprom)
+		panic("No eeprom given!");
+
+	printf("Board %.*s:%.*s serial %.*s",
+	       sizeof(eeprom->board_name), eeprom->board_name,
+	       sizeof(eeprom->board_version), eeprom->board_version,
+	       sizeof(eeprom->board_serial), eeprom->board_serial);
+
+	len = strnlen(eeprom->interface_version,
+		      sizeof(eeprom->interface_version));
+	if (len > 0)
+		printf(" HW interface version %.*s",
+		       sizeof(eeprom->interface_version),
+		       eeprom->interface_version);
+	puts("\n");
+}
+
 /*
  * Routine: misc_init_r
  * Description: Configure board specific parts
  */
 int misc_init_r(void)
 {
+	struct tricorder_eeprom eeprom;
+	get_eeprom(&eeprom);
+	print_hwversion(&eeprom);
+
 	twl4030_power_init();
 #ifdef CONFIG_TWL4030_LED
 	twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
diff --git a/include/configs/tricorder.h b/include/configs/tricorder.h
index a3d8f12f97..087c44ca51 100644
--- a/include/configs/tricorder.h
+++ b/include/configs/tricorder.h
@@ -57,6 +57,9 @@
 
 /* Hardware drivers */
 
+/* GPIO support */
+#define CONFIG_OMAP_GPIO
+
 /* NS16550 Configuration */
 #define CONFIG_SYS_NS16550
 #define CONFIG_SYS_NS16550_SERIAL
@@ -150,6 +153,9 @@
 
 #define CONFIG_BOOTDELAY		3
 
+/* hang() the board on panic() */
+#define CONFIG_PANIC_HANG
+
 /* environment placement (for NAND), is different for FLASHCARD but does not
  * harm there */
 #define CONFIG_ENV_OFFSET		0x120000    /* env start */
@@ -311,6 +317,7 @@
 #define CONFIG_SPL_NAND_SIMPLE
 
 #define CONFIG_SPL_BOARD_INIT
+#define CONFIG_SPL_GPIO_SUPPORT
 #define CONFIG_SPL_LIBCOMMON_SUPPORT
 #define CONFIG_SPL_LIBDISK_SUPPORT
 #define CONFIG_SPL_I2C_SUPPORT
-- 
2.25.1