Diff: targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_K82F/drivers/fsl_flexbus.c

Revision:

154:37f96f9d4de2

diff -r fa9ff456f731 -r 37f96f9d4de2 targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_K82F/drivers/fsl_flexbus.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_K82F/drivers/fsl_flexbus.c	Wed Jan 04 16:58:05 2017 +0000
@@ -0,0 +1,202 @@
+/*
+ * 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 "fsl_flexbus.h"
+
+/*******************************************************************************
+ * Prototypes
+ ******************************************************************************/
+
+/*!
+ * @brief Gets the instance from the base address
+ *
+ * @param base FLEXBUS peripheral base address
+ *
+ * @return The FLEXBUS instance
+ */
+static uint32_t FLEXBUS_GetInstance(FB_Type *base);
+
+/*******************************************************************************
+ * Variables
+ ******************************************************************************/
+
+/*! @brief Pointers to FLEXBUS bases for each instance. */
+static FB_Type *const s_flexbusBases[] = FB_BASE_PTRS;
+
+#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
+/*! @brief Pointers to FLEXBUS clocks for each instance. */
+static const clock_ip_name_t s_flexbusClocks[] = FLEXBUS_CLOCKS;
+#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
+
+/*******************************************************************************
+ * Code
+ ******************************************************************************/
+
+static uint32_t FLEXBUS_GetInstance(FB_Type *base)
+{
+    uint32_t instance;
+
+    /* Find the instance index from base address mappings. */
+    for (instance = 0; instance < FSL_FEATURE_SOC_FB_COUNT; instance++)
+    {
+        if (s_flexbusBases[instance] == base)
+        {
+            break;
+        }
+    }
+
+    assert(instance < FSL_FEATURE_SOC_FB_COUNT);
+
+    return instance;
+}
+
+void FLEXBUS_Init(FB_Type *base, const flexbus_config_t *config)
+{
+    assert(config != NULL);
+    assert(config->chip < FB_CSAR_COUNT);
+    assert(config->waitStates <= 0x3FU);
+
+    uint32_t chip = 0;
+    uint32_t reg_value = 0;
+
+#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
+    /* Ungate clock for FLEXBUS */
+    CLOCK_EnableClock(s_flexbusClocks[FLEXBUS_GetInstance(base)]);
+#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
+
+    /* Reset all the register to default state */
+    for (chip = 0; chip < FB_CSAR_COUNT; chip++)
+    {
+        /* Reset CSMR register, all chips not valid (disabled) */
+        base->CS[chip].CSMR = 0x0000U;
+        /* Set default base address */
+        base->CS[chip].CSAR &= (~FB_CSAR_BA_MASK);
+        /* Reset FB_CSCRx register */
+        base->CS[chip].CSCR = 0x0000U;
+    }
+    /* Set FB_CSPMCR register */
+    /* FlexBus signal group 1 multiplex control */
+    reg_value |= kFLEXBUS_MultiplexGroup1_FB_ALE << FB_CSPMCR_GROUP1_SHIFT;
+    /* FlexBus signal group 2 multiplex control */
+    reg_value |= kFLEXBUS_MultiplexGroup2_FB_CS4 << FB_CSPMCR_GROUP2_SHIFT;
+    /* FlexBus signal group 3 multiplex control */
+    reg_value |= kFLEXBUS_MultiplexGroup3_FB_CS5 << FB_CSPMCR_GROUP3_SHIFT;
+    /* FlexBus signal group 4 multiplex control */
+    reg_value |= kFLEXBUS_MultiplexGroup4_FB_TBST << FB_CSPMCR_GROUP4_SHIFT;
+    /* FlexBus signal group 5 multiplex control */
+    reg_value |= kFLEXBUS_MultiplexGroup5_FB_TA << FB_CSPMCR_GROUP5_SHIFT;
+    /* Write to CSPMCR register */
+    base->CSPMCR = reg_value;
+
+    /* Update chip value */
+    chip = config->chip;
+
+    /* Base address */
+    reg_value = config->chipBaseAddress;
+    /* Write to CSAR register */
+    base->CS[chip].CSAR = reg_value;
+    /* Chip-select validation */
+    reg_value = 0x1U << FB_CSMR_V_SHIFT;
+    /* Write protect */
+    reg_value |= (uint32_t)(config->writeProtect) << FB_CSMR_WP_SHIFT;
+    /* Base address mask */
+    reg_value |= config->chipBaseAddressMask << FB_CSMR_BAM_SHIFT;
+    /* Write to CSMR register */
+    base->CS[chip].CSMR = reg_value;
+    /* Burst write */
+    reg_value = (uint32_t)(config->burstWrite) << FB_CSCR_BSTW_SHIFT;
+    /* Burst read */
+    reg_value |= (uint32_t)(config->burstRead) << FB_CSCR_BSTR_SHIFT;
+    /* Byte-enable mode */
+    reg_value |= (uint32_t)(config->byteEnableMode) << FB_CSCR_BEM_SHIFT;
+    /* Port size */
+    reg_value |= (uint32_t)config->portSize << FB_CSCR_PS_SHIFT;
+    /* The internal transfer acknowledge for accesses */
+    reg_value |= (uint32_t)(config->autoAcknowledge) << FB_CSCR_AA_SHIFT;
+    /* Byte-Lane shift */
+    reg_value |= (uint32_t)config->byteLaneShift << FB_CSCR_BLS_SHIFT;
+    /* The number of wait states */
+    reg_value |= (uint32_t)config->waitStates << FB_CSCR_WS_SHIFT;
+    /* Write address hold or deselect */
+    reg_value |= (uint32_t)config->writeAddressHold << FB_CSCR_WRAH_SHIFT;
+    /* Read address hold or deselect */
+    reg_value |= (uint32_t)config->readAddressHold << FB_CSCR_RDAH_SHIFT;
+    /* Address setup */
+    reg_value |= (uint32_t)config->addressSetup << FB_CSCR_ASET_SHIFT;
+    /* Extended transfer start/extended address latch */
+    reg_value |= (uint32_t)(config->extendTransferAddress) << FB_CSCR_EXTS_SHIFT;
+    /* Secondary wait state */
+    reg_value |= (uint32_t)(config->secondaryWaitStates) << FB_CSCR_SWSEN_SHIFT;
+    /* Write to CSCR register */
+    base->CS[chip].CSCR = reg_value;
+    /* FlexBus signal group 1 multiplex control */
+    reg_value = (uint32_t)config->group1MultiplexControl << FB_CSPMCR_GROUP1_SHIFT;
+    /* FlexBus signal group 2 multiplex control */
+    reg_value |= (uint32_t)config->group2MultiplexControl << FB_CSPMCR_GROUP2_SHIFT;
+    /* FlexBus signal group 3 multiplex control */
+    reg_value |= (uint32_t)config->group3MultiplexControl << FB_CSPMCR_GROUP3_SHIFT;
+    /* FlexBus signal group 4 multiplex control */
+    reg_value |= (uint32_t)config->group4MultiplexControl << FB_CSPMCR_GROUP4_SHIFT;
+    /* FlexBus signal group 5 multiplex control */
+    reg_value |= (uint32_t)config->group5MultiplexControl << FB_CSPMCR_GROUP5_SHIFT;
+    /* Write to CSPMCR register */
+    base->CSPMCR = reg_value;
+}
+
+void FLEXBUS_Deinit(FB_Type *base)
+{
+#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
+    /* Gate clock for FLEXBUS */
+    CLOCK_DisableClock(s_flexbusClocks[FLEXBUS_GetInstance(base)]);
+#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
+}
+
+void FLEXBUS_GetDefaultConfig(flexbus_config_t *config)
+{
+    config->chip = 0;                                  /* Chip 0 FlexBus for validation */
+    config->writeProtect = 0;                          /* Write accesses are allowed */
+    config->burstWrite = 0;                            /* Burst-Write disable */
+    config->burstRead = 0;                             /* Burst-Read disable */
+    config->byteEnableMode = 0;                        /* Byte-Enable mode is asserted for data write only */
+    config->autoAcknowledge = true;                    /* Auto-Acknowledge enable */
+    config->extendTransferAddress = 0;                 /* Extend transfer start/extend address latch disable */
+    config->secondaryWaitStates = 0;                   /* Secondary wait state disable */
+    config->byteLaneShift = kFLEXBUS_NotShifted;       /* Byte-Lane shift disable */
+    config->writeAddressHold = kFLEXBUS_Hold1Cycle;    /* Write address hold 1 cycles */
+    config->readAddressHold = kFLEXBUS_Hold1Or0Cycles; /* Read address hold 0 cycles */
+    config->addressSetup =
+        kFLEXBUS_FirstRisingEdge;      /* Assert ~FB_CSn on the first rising clock edge after the address is asserted */
+    config->portSize = kFLEXBUS_1Byte; /* 1 byte port size of transfer */
+    config->group1MultiplexControl = kFLEXBUS_MultiplexGroup1_FB_ALE;  /* FB_ALE */
+    config->group2MultiplexControl = kFLEXBUS_MultiplexGroup2_FB_CS4;  /* FB_CS4 */
+    config->group3MultiplexControl = kFLEXBUS_MultiplexGroup3_FB_CS5;  /* FB_CS5 */
+    config->group4MultiplexControl = kFLEXBUS_MultiplexGroup4_FB_TBST; /* FB_TBST */
+    config->group5MultiplexControl = kFLEXBUS_MultiplexGroup5_FB_TA;   /* FB_TA */
+}