1 files changed, 187 insertions, 0 deletions
diff --git a/platform/drivers/src/rdc_semaphore.c b/platform/drivers/src/rdc_semaphore.c
new file mode 100644
index 0000000..3f97d90
--- /dev/null
+++ b/platform/drivers/src/rdc_semaphore.c
@@ -0,0 +1,187 @@
+/*
+ * 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.
+ */
+
+#include <assert.h>
+#include "rdc_semaphore.h"
+
+/*******************************************************************************
+ * Code
+ ******************************************************************************/
+
+/*******************************************************************************
+ * Private Functions
+ ******************************************************************************/
+static RDC_SEMAPHORE_Type *RDC_SEMAPHORE_GetGate(uint32_t *pdap)
+{
+    RDC_SEMAPHORE_Type *semaphore;
+
+    if (*pdap < 64)
+        semaphore = RDC_SEMAPHORE1;
+    else
+    {
+        semaphore = RDC_SEMAPHORE2;
+        *pdap -= 64;
+    }
+
+    return semaphore;
+}
+
+/*FUNCTION**********************************************************************
+ *
+ * Function Name : RDC_SEMAPHORE_TryLock
+ * Description   : Lock RDC semaphore for shared peripheral access
+ *
+ *END**************************************************************************/
+rdc_semaphore_status_t RDC_SEMAPHORE_TryLock(uint32_t pdap)
+{
+    RDC_SEMAPHORE_Type *semaphore;
+    uint32_t index = pdap;
+
+    semaphore = RDC_SEMAPHORE_GetGate(&index);
+
+    semaphore->GATE[index] = RDC_SEMAPHORE_GATE_GTFSM(RDC_SEMAPHORE_MASTER_SELF + 1);
+
+    return ((semaphore->GATE[index] & RDC_SEMAPHORE_GATE_GTFSM_MASK) ==
+           RDC_SEMAPHORE_GATE_GTFSM(RDC_SEMAPHORE_MASTER_SELF + 1)) ?
+           statusRdcSemaphoreSuccess : statusRdcSemaphoreBusy;
+}
+
+/*FUNCTION**********************************************************************
+ *
+ * Function Name : RDC_SEMAPHORE_Lock
+ * Description   : Lock RDC semaphore for shared peripheral access, polling until
+ *                 success.
+ *
+ *END**************************************************************************/
+void RDC_SEMAPHORE_Lock(uint32_t pdap)
+{
+    RDC_SEMAPHORE_Type *semaphore;
+    uint32_t index = pdap;
+
+    semaphore = RDC_SEMAPHORE_GetGate(&index);
+
+    do {
+        /* Wait gate status free */
+        while (semaphore->GATE[index] & RDC_SEMAPHORE_GATE_GTFSM_MASK) { }
+        semaphore->GATE[index] = RDC_SEMAPHORE_GATE_GTFSM(RDC_SEMAPHORE_MASTER_SELF + 1);
+    } while ((semaphore->GATE[index] & RDC_SEMAPHORE_GATE_GTFSM_MASK) !=
+             RDC_SEMAPHORE_GATE_GTFSM(RDC_SEMAPHORE_MASTER_SELF + 1));
+}
+
+/*FUNCTION**********************************************************************
+ *
+ * Function Name : RDC_SEMAPHORE_Unlock
+ * Description   : Unlock RDC semaphore
+ *
+ *END**************************************************************************/
+void RDC_SEMAPHORE_Unlock(uint32_t pdap)
+{
+    RDC_SEMAPHORE_Type *semaphore;
+    uint32_t index = pdap;
+
+    semaphore = RDC_SEMAPHORE_GetGate(&index);
+
+    semaphore->GATE[index] = RDC_SEMAPHORE_GATE_GTFSM(0);
+}
+
+/*FUNCTION**********************************************************************
+ *
+ * Function Name : RDC_SEMAPHORE_GetLockDomainID
+ * Description   : Get domain ID which locks the semaphore
+ *
+ *END**************************************************************************/
+uint32_t RDC_SEMAPHORE_GetLockDomainID(uint32_t pdap)
+{
+    RDC_SEMAPHORE_Type *semaphore;
+    uint32_t index = pdap;
+
+    semaphore = RDC_SEMAPHORE_GetGate(&index);
+
+    return (semaphore->GATE[index] & RDC_SEMAPHORE_GATE_LDOM_MASK) >> RDC_SEMAPHORE_GATE_LDOM_SHIFT;
+}
+
+/*FUNCTION**********************************************************************
+ *
+ * Function Name : RDC_SEMAPHORE_GetLockMaster
+ * Description   : Get master index which locks the semaphore
+ *
+ *END**************************************************************************/
+uint32_t RDC_SEMAPHORE_GetLockMaster(uint32_t pdap)
+{
+    RDC_SEMAPHORE_Type *semaphore;
+    uint32_t index = pdap;
+    uint8_t master;
+
+    semaphore = RDC_SEMAPHORE_GetGate(&index);
+
+    master = (semaphore->GATE[index] & RDC_SEMAPHORE_GATE_GTFSM_MASK) >> RDC_SEMAPHORE_GATE_GTFSM_SHIFT;
+
+    return master == 0 ? RDC_SEMAPHORE_MASTER_NONE : master - 1;
+}
+
+/*FUNCTION**********************************************************************
+ *
+ * Function Name : RDC_SEMAPHORE_Reset
+ * Description   : Reset RDC semaphore to unlocked status
+ *
+ *END**************************************************************************/
+void RDC_SEMAPHORE_Reset(uint32_t pdap)
+{
+    RDC_SEMAPHORE_Type *semaphore;
+    uint32_t index = pdap;
+
+    semaphore = RDC_SEMAPHORE_GetGate(&index);
+
+    /* The reset state machine must be in idle state */
+    assert ((semaphore->RSTGT_R & RDC_SEMAPHORE_RSTGT_R_RSTGSM_MASK) == 0);
+
+    semaphore->RSTGT_W = 0xE2;
+    semaphore->RSTGT_W = 0x1D | RDC_SEMAPHORE_RSTGT_W_RSTGTN(index);
+}
+
+/*FUNCTION**********************************************************************
+ *
+ * Function Name : RDC_SEMAPHORE_ResetAll
+ * Description   : Reset all RDC semaphores to unlocked status for certain
+ *                 RDC_SEMAPHORE instance
+ *
+ *END**************************************************************************/
+void RDC_SEMAPHORE_ResetAll(RDC_SEMAPHORE_Type *base)
+{
+    /* The reset state machine must be in idle state */
+    assert ((base->RSTGT_R & RDC_SEMAPHORE_RSTGT_R_RSTGSM_MASK) == 0);
+
+    base->RSTGT_W = 0xE2;
+    base->RSTGT_W = 0x1D | RDC_SEMAPHORE_RSTGT_W_RSTGTN_MASK;
+}
+
+/*******************************************************************************
+ * EOF
+ ******************************************************************************/