imx233: add pinctrl debug code to track pin uses

Past development has proved that one can mistakely use
the same pin for two uses without noticing. Since this
causes extremely hard to find bugs, the infrastructure
will allow to register pin uses and panic when a conflict
is detected. The pinctrl debug now shows the pin uses
when its support is compiled in.

Change-Id: Idb2d5235ce09207d77aa474d6f158e72b933761a

1 files changed, 29 insertions, 0 deletions

diff --git a/firmware/target/arm/imx233/debug-imx233.c b/firmware/target/arm/imx233/debug-imx233.c
index fd510b77c1..59792c17a8 100644
--- a/firmware/target/arm/imx233/debug-imx233.c
+++ b/firmware/target/arm/imx233/debug-imx233.c
@@ -399,13 +399,25 @@ bool dbg_hw_info_pinctrl(void)
 {
     lcd_setfont(FONT_SYSFIXED);
 
+#ifdef IMX233_PINCTRL_DEBUG
+    unsigned top_user = 0;
+#endif
     while(1)
     {
         int button = get_action(CONTEXT_STD, HZ / 10);
         switch(button)
         {
             case ACTION_STD_NEXT:
+#ifdef IMX233_PINCTRL_DEBUG
+                top_user++;
+                break;
+#endif
             case ACTION_STD_PREV:
+#ifdef IMX233_PINCTRL_DEBUG
+                if(top_user > 0)
+                    top_user--;
+                break;
+#endif
             case ACTION_STD_OK:
             case ACTION_STD_MENU:
                 lcd_setfont(FONT_UI);
@@ -418,6 +430,23 @@ bool dbg_hw_info_pinctrl(void)
         lcd_clear_display();
         for(int i = 0; i < 4; i++)
             lcd_putsf(0, i, "DIN%d = 0x%08x", i, imx233_get_gpio_input_mask(i, 0xffffffff));
+#ifdef IMX233_PINCTRL_DEBUG
+        unsigned cur_line = 6;
+        unsigned last_line = lcd_getheight() / font_get(lcd_getfont())->height;
+        unsigned cur_idx = 0;
+
+        for(int bank = 0; bank < 4; bank++)
+        for(int pin = 0; pin < 32; pin++)
+        {
+            const char *owner = imx233_pinctrl_get_pin_use(bank, pin);
+            if(owner == NULL)
+                continue;
+            if(cur_idx++ >= top_user && cur_line < last_line)
+                lcd_putsf(0, cur_line++, "B%dP%02d %s", bank, pin, owner);
+        }
+        if(cur_idx < top_user)
+            top_user = cur_idx - 1;
+#endif
         lcd_update();
         yield();
     }