[target][uzed] add debug led support

Change-Id: Ia077ae7f2f81a2b43a73dd5bc3b5f9cd624af10a

target/uzed/include/target/gpioconfig.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008 Brian Swetland
+ * Copyright (c) 2015 Travis Geiselbrecht
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files
@@ -20,22 +20,8 @@
  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
+#pragma once
 
-.global dcc_putc
-.global dcc_getc
+/* gpios on the microzed target */
+#define GPIO_LEDR       (47)
 
-#if defined(ARM_ISA_ARMV6) || defined(ARM_ISA_ARMV7)
-dcc_getc:
-	mrc 14, 0, r0, c0, c1, 0 
-	tst r0, #(1 << 30)
-	moveq r0, #-1
-	mrcne 14, 0, r0, c0, c5, 0
-	bx lr
-
-dcc_putc:
-	mrc 14, 0, r15, c0, c1, 0 
-	mcrcc 14, 0, r0, c0, c5, 0
-	movcc r0, #0
-	movcs r0, #-1
-	bx lr
-#endif

target/uzed/rules.mk

@@ -13,7 +13,8 @@ GLOBAL_INCLUDES += \
 	$(LOCAL_DIR)/include
 
 GLOBAL_DEFINES += \
-	EXTERNAL_CLOCK_FREQ=33333333
+	EXTERNAL_CLOCK_FREQ=33333333 \
+	TARGET_HAS_DEBUG_LED=1 \
 
 MODULE_SRCS += \
 	$(LOCAL_DIR)/target.c

target/uzed/target.c

@@ -20,6 +20,8 @@
  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
+#include <dev/gpio.h>
+#include <target/gpioconfig.h>
 #include <platform/zynq.h>
 #include <platform/gem.h>
 
@@ -172,6 +174,8 @@ const zynq_clk_cfg_t zynq_clk_cfg = {
 
 void target_early_init(void)
 {
+    gpio_config(GPIO_LEDR, GPIO_OUTPUT);
+    gpio_set(GPIO_LEDR, 0);
 }
 
 void target_init(void)
@@ -179,3 +183,9 @@ void target_init(void)
     gem_init(GEM0_BASE, 256*1024);
 }
 
+void target_set_debug_led(unsigned int led, bool on)
+{
+    if (led == 0)
+        gpio_set(GPIO_LEDR, on);
+}
+