hwstub: add delay functions, and plain binary/sb file generation

Change-Id: Idbedb9277b355edcd93975ec5a268428c7b89633

utils/hwstub/stub/hwstub.make

@@ -14,9 +14,10 @@ OBJ=$(SRC:.c=.o)
 OBJ:=$(OBJ:.S=.o)
 OBJ_EXCEPT_CRT0=$(filter-out $(BUILD_DIR)/crt0.o,$(OBJ))
 EXEC_ELF=$(BUILD_DIR)/hwstub.elf
+EXEC_BIN=$(BUILD_DIR)/hwstub.bin
 DEPS=$(foreach obj,$(OBJ),$(obj).d)
 
-EXEC=$(EXEC_ELF)
+EXEC+=$(EXEC_ELF) $(EXEC_BIN)
 
 SILENT?=@
 PRINTS=$(SILENT)$(call info,$(1))
@@ -45,5 +46,9 @@ $(EXEC_ELF): $(OBJ) $(TMP_LDS)
 	$(call PRINTS,LD $(@F))
 	$(SILENT)$(LD) $(LDFLAGS) -o $@ $(OBJ_EXCEPT_CRT0)
 	
+$(EXEC_BIN): $(EXEC_ELF)
+	$(call PRINTS,OC $(@F))
+	$(SILENT)$(OC) -O binary $< $@
+
 clean:
 	$(SILENT)rm -rf $(OBJ) $(DEPS) $(EXEC) $(TMP_LDS) $(TMP_MAP)

utils/hwstub/stub/stmp/Makefile

@@ -5,10 +5,16 @@ CC=arm-elf-eabi-gcc
 LD=arm-elf-eabi-gcc
 AS=arm-elf-eabi-gcc
 OC=arm-elf-eabi-objcopy
+SBTOELF=$(CURDIR)/../../../imxtools/sbtools/elftosb
 DEFINES=
 INCLUDES=-I$(CURDIR)
 GCCOPTS=-mcpu=arm926ej-s
 BUILD_DIR=$(CURDIR)/build/
 ROOT_DIR=$(CURDIR)/..
+EXEC=$(BUILD_DIR)/hwstub.sb
 
 include ../hwstub.make
+
+$(BUILD_DIR)/hwstub.sb: $(EXEC_BIN)
+	$(call PRINTS,SBTOELF $(@F))
+	$(SILENT)$(SBTOELF) -z -c hwstub.db -o $@ $<

utils/hwstub/stub/stmp/target.c

@@ -273,3 +273,18 @@ void target_exit(void)
             return;
     }
 }
+
+void target_udelay(int us)
+{
+    uint32_t cur = HW_DIGCTL_MICROSECONDS;
+    uint32_t end = cur + us;
+    if(cur < end)
+        while(HW_DIGCTL_MICROSECONDS < end) {}
+    else
+        while(HW_DIGCTL_MICROSECONDS >= cur) {}
+}
+
+void target_mdelay(int ms)
+{
+    return target_udelay(ms * 1000);
+}

utils/hwstub/stub/target.h

@@ -31,5 +31,9 @@ void target_exit(void);
 int target_get_info(int info, void **buffer);
 /* set atexit action or return -1 on error */
 int target_atexit(int action);
+/* Wait a very short time (us<=1000) */
+void target_udelay(int us);
+/* Wait for a short time (ms <= 1000) */
+void target_mdelay(int ms);
 
 #endif /* __TARGET_H__ */

utils/hwstub/stub/usb_drv_arc.c

@@ -23,6 +23,7 @@
 #include "usb_drv.h"
 #include "config.h"
 #include "memory.h"
+#include "target.h"
 
 #define MAX_PKT_SIZE        1024
 #define MAX_PKT_SIZE_EP0    64
@@ -323,6 +324,8 @@ void usb_drv_init(void)
     /* we don't know if USB was connected or not. In USB recovery mode it will
      * but in other cases it might not be. In doubt, disconnect */
     REG_USBCMD &= ~USBCMD_RUN;
+    /* wait a short time for the host to realise */
+    target_mdelay(50);
     /* reset the controller */
     REG_USBCMD |= USBCMD_CTRL_RESET;
     while(REG_USBCMD & USBCMD_CTRL_RESET);