Samsung YP-R0/YP-R1 Safe Mode improvement

This is an improvement for the special
mode present in the samsung ypr0 target.
Apart adding new useful functionalities, it
fixes a random disconnection bug, solved by debouncing
and fully support to YP-R1 target.
This opens also the possibility to interface
this operating mode to rockbox USB functionality.

Change-Id: Id70541541fcfaa1234328485fab0696a3bd491c9

1 files changed, 63 insertions, 0 deletions

diff --git a/utils/ypr0tools/cable_detect.c b/utils/ypr0tools/cable_detect.c
new file mode 100644
index 0000000000..57679d4b79
--- /dev/null
+++ b/utils/ypr0tools/cable_detect.c
@@ -0,0 +1,63 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Samsung YP-R1 runtime USB cable detection
+ *
+ * Copyright (C) 2013 Lorenzo Miori
+ *
+ * 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 <sys/ioctl.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#define IOCTL_PMU_MAGIC                 'A'
+
+#define E_IOCTL_PMU_GET_BATT_LVL        0
+#define E_IOCTL_PMU_GET_CHG_STATUS      1
+#define E_IOCTL_PMU_IS_EXT_PWR          2
+#define E_IOCTL_PMU_STOP_CHG            3
+#define E_IOCTL_PMU_START_CHG           4
+#define E_IOCTL_PMU_IS_EXT_PWR_OVP      5
+#define E_IOCTL_PMU_LCD_DIM_CTRL        6
+#define E_IOCTL_PMU_CORE_CTL_HIGH       7
+#define E_IOCTL_PMU_CORE_CTL_LOW        8
+#define E_IOCTL_PMU_TSP_USB_PWR_OFF     9
+
+#define IOCTL_PMU_GET_BATT_LVL          _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_GET_BATT_LVL)
+#define IOCTL_PMU_GET_CHG_STATUS        _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_GET_CHG_STATUS)
+#define IOCTL_PMU_IS_EXT_PWR            _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_IS_EXT_PWR)
+#define IOCTL_PMU_STOP_CHG              _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_STOP_CHG)
+#define IOCTL_PMU_START_CHG             _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_START_CHG)
+#define IOCTL_PMU_IS_EXT_PWR_OVP        _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_IS_EXT_PWR_OVP)
+#define IOCTL_PMU_LCD_DIM_CTRL          _IOW(IOCTL_PMU_MAGIC, E_IOCTL_PMU_LCD_DIM_CTRL, int)
+#define IOCTL_PMU_CORE_CTL_HIGH         _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_CORE_CTL_HIGH)
+#define IOCTL_PMU_CORE_CTL_LOW          _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_CORE_CTL_LOW)
+#define IOCTL_PMU_TSP_USB_PWR_OFF       _IO(IOCTL_PMU_MAGIC, E_IOCTL_PMU_TSP_USB_PWR_OFF)
+
+/*
+ * This is a very simple program that runs on device.
+ * It returns error code either 0 when (power/usb) cable
+ * is not connected or >= 1 if connected.
+ */
+int main(void)
+{
+    int state = -1;
+    int dev = open("/dev/r1Pmu", O_RDONLY);
+    state = ioctl(dev, IOCTL_PMU_IS_EXT_PWR);
+    close(dev);
+    return state;
+}