nwztools/plattools: add backlight test

Change-Id: I4bef0824eeed54238578d8b24a9845e8602d61af

utils/nwztools/plattools/nwz_lib.c

@@ -157,3 +157,29 @@ const char *nwz_key_get_name(int keycode)
     else
         return nwz_keyname[keycode];
 }
+
+int nwz_fb_open(bool lcd)
+{
+    return open(lcd ? "/dev/fb/0" : "/dev/fb/1", O_RDWR);
+}
+
+void nwz_fb_close(int fd)
+{
+    close(fd);
+}
+
+int nwz_fb_get_brightness(int fd, struct nwz_fb_brightness *bl)
+{
+    if(ioctl(fd, NWZ_FB_GET_BRIGHTNESS, bl) < 0)
+        return -1;
+    else
+        return 1;
+}
+
+int nwz_fb_set_brightness(int fd, struct nwz_fb_brightness *bl)
+{
+    if(ioctl(fd, NWZ_FB_SET_BRIGHTNESS, bl) < 0)
+        return -1;
+    else
+        return 1;
+}

utils/nwztools/plattools/nwz_lib.h

@@ -31,6 +31,7 @@
 #include <fcntl.h>
 
 #include "nwz_keys.h"
+#include "nwz_fb.h"
 
 /* run a program and exit with nonzero status in case of error
  * argument list must be NULL terminated */
@@ -60,5 +61,13 @@ bool nwz_key_event_is_press(struct input_event *evt);
 bool nwz_key_event_get_hold_status(struct input_event *evt);
 /* get keycode name */
 const char *nwz_key_get_name(int keycode);
+/* open framebuffer device */
+int nwz_fb_open(bool lcd);
+/* close framebuffer device */
+void nwz_fb_close(int fb);
+/* get backlight brightness (return -1 on error, 1 on success) */
+int nwz_fb_get_brightness(int fd, struct nwz_fb_brightness *bl);
+/* set backlight brightness (return -1 on error, 1 on success) */
+int nwz_fb_set_brightness(int fd, struct nwz_fb_brightness *bl);
 
 #endif /* _NWZLIB_H_ */

utils/nwztools/plattools/test_bl.c

@@ -0,0 +1,111 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2016 Amaury Pouly
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "nwz_lib.h"
+
+int main(int argc, char **argv)
+{
+    /* clear screen and display welcome message */
+    nwz_lcdmsg(true, 0, 0, "test_bl");
+    nwz_lcdmsg(false, 0, 2, "UP/DOWN: level");
+    nwz_lcdmsg(false, 0, 3, "LEFT/RIGHT: step");
+    nwz_lcdmsg(false, 0, 4, "VOL UP/DOWN: period");
+    nwz_lcdmsg(false, 0, 5, "PWR OFF: quit");
+    /* open input and framebuffer device */
+    int input_fd = nwz_key_open();
+    if(input_fd < 0)
+    {
+        nwz_lcdmsg(false, 3, 7, "Cannot open input device");
+        sleep(2);
+        return 1;
+    }
+    int fb_fd = nwz_fb_open(true);
+    if(fb_fd < 0)
+    {
+        nwz_lcdmsg(false, 3, 7, "Cannot open framebuffer device");
+        sleep(2);
+        return 1;
+    }
+    /* display input state in a loop */
+    while(1)
+    {
+        struct nwz_fb_brightness bl;
+        if(nwz_fb_get_brightness(fb_fd, &bl) == 1)
+        {
+            nwz_lcdmsgf(false, 1, 7, "level: %d   ", bl.level);
+            nwz_lcdmsgf(false, 1, 8, "step: %d   ", bl.step);
+            nwz_lcdmsgf(false, 1, 9, "period: %d   ", bl.period);
+        }
+        /* wait for event */
+        int ret = nwz_key_wait_event(input_fd, -1);
+        if(ret != 1)
+            continue;
+        struct input_event evt;
+        if(nwz_key_read_event(input_fd, &evt) != 1)
+            continue;
+        int code = nwz_key_event_get_keycode(&evt);
+        bool press = nwz_key_event_is_press(&evt);
+        /* only act on release */
+        if(press)
+            continue;
+        if(code == NWZ_KEY_OPTION)
+            break; /* quit */
+        bool change_bl = false;
+        if(code == NWZ_KEY_UP && bl.level < NWZ_FB_BL_MAX_LEVEL)
+        {
+            change_bl = true;
+            bl.level++;
+        }
+        else if(code == NWZ_KEY_DOWN && bl.level > NWZ_FB_BL_MIN_LEVEL)
+        {
+            change_bl = true;
+            bl.level--;
+        }
+        else if(code == NWZ_KEY_RIGHT && bl.step < NWZ_FB_BL_MAX_STEP)
+        {
+            change_bl = true;
+            bl.step++;
+        }
+        else if(code == NWZ_KEY_LEFT && bl.step > NWZ_FB_BL_MIN_STEP)
+        {
+            change_bl = true;
+            bl.step--;
+        }
+        else if(code == NWZ_KEY_VOL_UP && bl.period < 100) /* artificial bound on period */
+        {
+            change_bl = true;
+            bl.period++;
+        }
+        else if(code == NWZ_KEY_VOL_DOWN && bl.period > NWZ_FB_BL_MIN_PERIOD)
+        {
+            change_bl = true;
+            bl.period--;
+        }
+        /* change bl */
+        if(change_bl)
+            nwz_fb_set_brightness(fb_fd, &bl);
+    }
+    /* close input device */
+    close(input_fd);
+    /* finish nicely */
+    return 0;
+}
+ 
+