Blackfin: post: generalize led/button tests with GPIOs

Make it easy for any Blackfin board to enable led/push button tests.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

3 files changed, 104 insertions, 0 deletions

diff --git a/arch/blackfin/include/asm/config.h b/arch/blackfin/include/asm/config.h
index bc3c252..53af310 100644
--- a/arch/blackfin/include/asm/config.h
+++ b/arch/blackfin/include/asm/config.h
@@ -169,4 +169,22 @@
 # define CONFIG_SYS_BAUDRATE_TABLE { 9600, 19200, 38400, 57600, 115200 }
 #endif
 
+/* Blackfin POST tests */
+#ifdef CONFIG_POST_BSPEC1_GPIO_LEDS
+# define CONFIG_POST_BSPEC1 \
+	{ \
+		"LED test", "led", "This test verifies LEDs on the board.", \
+		POST_MEM | POST_ALWAYS, &led_post_test, NULL, NULL, \
+		CONFIG_SYS_POST_BSPEC1, \
+	}
+#endif
+#ifdef CONFIG_POST_BSPEC2_GPIO_BUTTONS
+# define CONFIG_POST_BSPEC2 \
+	{ \
+		"Button test", "button", "This test verifies buttons on the board.", \
+		POST_MEM | POST_ALWAYS, &button_post_test, NULL, NULL, \
+		CONFIG_SYS_POST_BSPEC2, \
+	}
+#endif
+
 #endif
diff --git a/arch/blackfin/lib/Makefile b/arch/blackfin/lib/Makefile
index 18c9f74..37e0663 100644
--- a/arch/blackfin/lib/Makefile
+++ b/arch/blackfin/lib/Makefile
@@ -46,6 +46,7 @@ COBJS-y	+= clocks.o
 COBJS-$(CONFIG_CMD_CACHE_DUMP) += cmd_cache_dump.o
 COBJS-$(CONFIG_CMD_KGDB) += kgdb.o
 COBJS-y	+= muldi3.o
+COBJS-$(CONFIG_HAS_POST) += post.o
 COBJS-y	+= string.o
 
 SRCS	:= $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
diff --git a/arch/blackfin/lib/post.c b/arch/blackfin/lib/post.c
new file mode 100644
index 0000000..b3c5fab
--- /dev/null
+++ b/arch/blackfin/lib/post.c
@@ -0,0 +1,85 @@
+/*
+ * Blackfin POST code
+ *
+ * Copyright (c) 2005-2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <config.h>
+#include <post.h>
+
+#include <asm/gpio.h>
+
+#if CONFIG_POST & CONFIG_SYS_POST_BSPEC1
+int led_post_test(int flags)
+{
+	unsigned leds[] = { CONFIG_POST_BSPEC1_GPIO_LEDS };
+	int i;
+
+	/* First turn them all off */
+	for (i = 0; i < ARRAY_SIZE(leds); ++i) {
+		if (gpio_request(leds[i], "post")) {
+			printf("could not request gpio %u\n", leds[i]);
+			continue;
+		}
+		gpio_direction_output(leds[i], 0);
+	}
+
+	/* Now turn them on one by one */
+	for (i = 0; i < ARRAY_SIZE(leds); ++i) {
+		printf("LED%i on", i + 1);
+		gpio_set_value(leds[i], 1);
+		udelay(1000000);
+		printf("\b\b\b\b\b\b\b");
+		gpio_free(leds[i]);
+	}
+
+	return 0;
+}
+#endif
+
+#if CONFIG_POST & CONFIG_SYS_POST_BSPEC2
+int button_post_test(int flags)
+{
+	unsigned buttons[] = { CONFIG_POST_BSPEC2_GPIO_BUTTONS };
+	unsigned int sws[] = { CONFIG_POST_BSPEC2_GPIO_NAMES };
+	int i, delay = 5;
+	unsigned short value = 0;
+	int result = 0;
+
+	for (i = 0; i < ARRAY_SIZE(buttons); ++i) {
+		if (gpio_request(buttons[i], "post")) {
+			printf("could not request gpio %u\n", buttons[i]);
+			continue;
+		}
+		gpio_direction_input(buttons[i]);
+
+		delay = 5;
+		printf("\n--------Press SW%i: %2d ", sws[i], delay);
+		while (delay--) {
+			int j;
+			for (j = 0; j < 100; j++) {
+				value = gpio_get_value(buttons[i]);
+				if (value != 0)
+					break;
+				udelay(10000);
+			}
+			printf("\b\b\b%2d ", delay);
+		}
+		if (value != 0)
+			puts("\b\bOK");
+		else {
+			result = -1;
+			puts("\b\bfailed");
+		}
+
+		gpio_free(buttons[i]);
+	}
+
+	puts("\n");
+
+	return result;
+}
+#endif