msm_shared: Add shutdown device detection support
If below condition is met, we will shut down the device.
Otherwise it will do nothing and return to normal boot.
conditions: 1. it is triggered by power key &&
2. the power key is released before (PWRKEY_LONG_PRESS_COUNT /
MPM_SLEEP_TIMETICK_COUNT) seconds.
Change-Id: I93827ca44cb30c76d1b856b8f1ff8f5923f45613
diff --git a/platform/msm_shared/include/shutdown_detect.h b/platform/msm_shared/include/shutdown_detect.h
new file mode 100644
index 0000000..23690c9
--- /dev/null
+++ b/platform/msm_shared/include/shutdown_detect.h
@@ -0,0 +1,33 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of The Linux Foundation, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __PLATFORM_MSM_SHARED_SHUTDOWN_DETECT_H
+#define __PLATFORM_MSM_SHARED_SHUTDOWN_DETECT_H
+
+void shutdown_detect(void);
+#endif /* __PLATFORM_MSM_SHARED_SHUTDOWN_DETECT_H */
diff --git a/platform/msm_shared/shutdown_detect.c b/platform/msm_shared/shutdown_detect.c
new file mode 100644
index 0000000..a51c9ae
--- /dev/null
+++ b/platform/msm_shared/shutdown_detect.c
@@ -0,0 +1,160 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of The Linux Foundation, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <debug.h>
+#include <reg.h>
+#include <stdlib.h>
+#include <pm8x41.h>
+#include <pm8x41_hw.h>
+#include <kernel/timer.h>
+#include <platform/timer.h>
+#include <shutdown_detect.h>
+
+/* sleep clock is 32.768 khz, 0x8000 count per second */
+#define MPM_SLEEP_TIMETICK_COUNT 0x8000
+#define PWRKEY_LONG_PRESS_COUNT 0xC000
+#define QPNP_DEFAULT_TIMEOUT 250
+#define PWRKEY_DETECT_FREQUENCY 50
+
+static struct timer pon_timer;
+static uint32_t pon_timer_complete = 0;
+
+/*
+ * Function to check if the the power key is pressed long enough.
+ * Return 0 if boot time more than PWRKEY_LONG_PRESS_COUNT.
+ * Return 1 if boot time less than PWRKEY_LONG_PRESS_COUNT.
+ */
+static uint32_t is_pwrkey_time_expired()
+{
+ /* power on button tied in with PMIC KPDPWR. */
+ uint32_t sclk_count = platform_get_sclk_count();
+
+ /* Here check if the long press power-key lasts for 1.5s */
+ if (sclk_count > PWRKEY_LONG_PRESS_COUNT)
+ return 0;
+ else
+ return 1;
+}
+
+/*
+ * Function to check if the power on reason is power key triggered.
+ * Return 1 if it is triggered by power key.
+ * Return 0 if it is not triggered by power key.
+ */
+static uint32_t is_pwrkey_pon_reason()
+{
+ uint8_t pon_reason = pm8x41_get_pon_reason();
+
+ if (pm8x41_get_is_cold_boot() && (pon_reason == KPDPWR_N))
+ return 1;
+ else
+ return 0;
+}
+
+/*
+ * Main timer handle: check every PWRKEY_DETECT_FREQUENCY to see
+ * if power key is pressed.
+ * Shutdown the device if power key is release before
+ * (PWRKEY_LONG_PRESS_COUNT/MPM_SLEEP_TIMETICK_COUNT) seconds.
+ */
+static enum handler_return long_press_pwrkey_timer_func(struct timer *p_timer,
+ void *arg)
+{
+ uint32_t sclk_count = platform_get_sclk_count();
+
+ /*
+ * The following condition is treated as the power key
+ * is pressed long enough.
+ * 1. if the power key is pressed last for PWRKEY_LONG_PRESS_COUNT.
+ */
+ if (sclk_count > PWRKEY_LONG_PRESS_COUNT) {
+ timer_cancel(p_timer);
+ pon_timer_complete = 1;
+ } else {
+ if (pm8x41_get_pwrkey_is_pressed()) {
+ /*
+ * For normal man response is > 0.1 secs, so we use 0.05 secs default
+ * for software to be safely detect if there is a key release action.
+ */
+ timer_set_oneshot(p_timer, PWRKEY_DETECT_FREQUENCY,
+ long_press_pwrkey_timer_func, NULL);
+ } else {
+ shutdown_device();
+ }
+ }
+
+ return INT_RESCHEDULE;
+}
+
+/*
+ * Function to wait until the power key is pressed long enough
+ */
+static void wait_for_long_pwrkey_pressed()
+{
+ uint32_t sclk_count = 0;
+
+ while (!pon_timer_complete) {
+ sclk_count = platform_get_sclk_count();
+ if (sclk_count > PWRKEY_LONG_PRESS_COUNT) {
+ timer_cancel(&pon_timer);
+ break;
+ }
+ }
+}
+
+/*
+ * Function to support for shutdown detection
+ * If below condition is met, the function will shut down
+ * the device. Otherwise it will do nothing and return to
+ * normal boot.
+ * condition:
+ * 1. it is triggered by power key &&
+ * 2. the power key is released before
+ * (PWRKEY_LONG_PRESS_COUNT/MPM_SLEEP_TIMETICK_COUNT) seconds.
+ */
+void shutdown_detect()
+{
+ /*
+ * If it is booted by power key tirigger.
+ * Initialize pon_timer and call long_press_pwrkey_timer_func
+ * function to check if the power key is last press long enough.
+ */
+ if (is_pwrkey_pon_reason() && is_pwrkey_time_expired()) {
+ timer_initialize(&pon_timer);
+ timer_set_oneshot(&pon_timer, 0, long_press_pwrkey_timer_func, NULL);
+
+ /*
+ * Wait until long press power key timeout
+ *
+ * It will be confused to end users if we shutdown the device
+ * after the splash screen displayed. But it can be moved the
+ * wait here if the boot time is much more considered.
+ */
+ wait_for_long_pwrkey_pressed();
+ }
+}