1 files changed, 132 insertions, 0 deletions
diff --git a/examples/imx7_colibri_m4/low_power_demo/lpm_mcore.h b/examples/imx7_colibri_m4/low_power_demo/lpm_mcore.h
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+++ b/examples/imx7_colibri_m4/low_power_demo/lpm_mcore.h
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+/*
+ * Copyright (c) 2015, Freescale Semiconductor, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * o Redistributions of source code must retain the above copyright notice, this list
+ *   of conditions and the following disclaimer.
+ *
+ * o 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.
+ *
+ * o Neither the name of Freescale Semiconductor, 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 BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 __LPM_MCORE_H__
+#define __LPM_MCORE_H__
+
+#include "gpc.h"
+#include "device_imx.h"
+
+#define DELAY_LOOP_CNT_LOW_SPEED 10
+#define DELAY_CNT 100
+
+#define LPCR_M4_RUN  0
+#define LPCR_M4_WAIT 1
+#define LPCR_M4_STOP 2
+
+#define LPM_MCORE_MU_CHANNEL    0
+
+#define LPM_MCORE_PRINT_DEBUG_INFO      1
+
+#define MSG_LPM_M4_RUN                  0x5A5A0001
+#define MSG_LPM_M4_WAIT                 0x5A5A0002
+#define MSG_LPM_M4_STOP                 0x5A5A0003
+
+#define MSG_LPM_M4_REQUEST_HIGHBUS      0x2222CCCC
+#define MSG_LPM_M4_RELEASE_HIGHBUS      0x2222BBBB
+
+#define MSG_LPM_A7_HIGHBUS_READY        0xFFFF6666
+
+#define GPC_SYNC_DELAY_CNT              65536
+
+/*
+ * LPM state of M4 core
+ */
+typedef enum lpm_power_status_m4 {
+    LPM_M4_STATE_RUN,
+    LPM_M4_STATE_WAIT,
+    LPM_M4_STATE_STOP,
+} LPM_POWER_STATUS_M4;
+
+/*
+ * Clock Speed of M4 core
+ */
+typedef enum lpm_m4_clock_speed {
+    LPM_M4_HIGH_FREQ,
+    LPM_M4_LOW_FREQ
+} LPM_M4_CLOCK_SPEED;
+
+/*
+ * Linklist of wakeup interrupt
+ */
+typedef struct wakeup_int_ele WAKEUP_INT_ELE, *P_WAKEUP_INT_ELE;
+struct wakeup_int_ele {
+    P_WAKEUP_INT_ELE next;
+    uint32_t irq_no;
+    uint32_t irq_priority_backup;
+};
+
+/*
+ * low power driver initialization
+ */
+void LPM_MCORE_Init(GPC_Type * base);
+
+/*
+ * get the current lpm state of M4 core
+ */
+LPM_POWER_STATUS_M4 LPM_MCORE_GetPowerStatus(GPC_Type * base);
+
+/*
+ * set the next lpm state of M4 core, the state will be entered
+ * next time WFI is executed
+ */
+void LPM_MCORE_SetPowerStatus(GPC_Type * base, LPM_POWER_STATUS_M4 m4_next_lpm);
+
+/*
+ * provide readable information of current m4 core lpm state
+ */
+const char* LPM_MCORE_GetPowerStatusString(void);
+
+/*
+ * register/unregister a peripherail interrupt to M4 core wakeup interrupt
+ */
+void LPM_MCORE_RegisterWakeupInterrupt(GPC_Type * base, uint32_t irq_no, GPC_IRQ_WAKEUP_MODE wakeup_mode);
+
+/*
+ * change the m4 core clock between 24MHz(OSC) and 240MHz (SysPllDiv2)
+ */
+void LPM_MCORE_ChangeM4Clock(LPM_M4_CLOCK_SPEED target);
+
+/*
+ * Check if A7 LPM driver is ready
+ */
+uint32_t LPM_MCORE_CheckPeerReady(void);
+
+/*
+ * Set M4 LPM driver ready flag to A7 Peer
+ */
+void LPM_MCORE_SetSelfReady(void);
+
+/*
+ * Function to inserted into FreeRTOS idletask hook
+ */
+void LPM_MCORE_WaitForInt(void);
+
+#endif