nwztools/plattools: fix black screen issue in dualboot, rework dualboot

Sony added extensions to the frambuffer interface. It is important to take them
into account since the OF uses them and might leave the framebuffer in an
unusual state which would make the dualboot not display anything. Also rework
the dualboot code so that it can boot rockbox (not doing anything at the moment),
display all tools or boot the OF.

Change-Id: Ia0f589c9ec8558f375270841503c0964aff07f0b

1 files changed, 21 insertions, 0 deletions

diff --git a/utils/nwztools/plattools/nwz_lib.c b/utils/nwztools/plattools/nwz_lib.c
index 087db8834a..43dc977d42 100644
--- a/utils/nwztools/plattools/nwz_lib.c
+++ b/utils/nwztools/plattools/nwz_lib.c
@@ -238,6 +238,27 @@ int nwz_fb_set_brightness(int fd, struct nwz_fb_brightness *bl)
         return 1;
 }
 
+int nwz_fb_set_standard_mode(int fd)
+{
+    /* disable timer (apparently useless with LCD) */
+    struct nwz_fb_update_timer update_timer;
+    update_timer.timerflag = NWZ_FB_TIMER_OFF;
+    update_timer.timeout = NWZ_FB_DEFAULT_TIMEOUT;
+    if(ioctl(fd, NWZ_FB_UPDATE_TIMER, &update_timer) < 0)
+        return -1;
+    /* set page 0 mode to no transparency and no rotation */
+    struct nwz_fb_image_info mode_info;
+    mode_info.tc_enable = 0;
+    mode_info.t_color = 0;
+    mode_info.alpha = 0;
+    mode_info.rot = 0;
+    mode_info.page = 0;
+    mode_info.update = NWZ_FB_ONLY_2D_MODE;
+    if(ioctl(fd, NWZ_FB_UPDATE, &mode_info) < 0)
+        return -2;
+    return 0;
+}
+
 int nwz_adc_open(void)
 {
     return open(NWZ_ADC_DEV, O_RDONLY);