144 lines
5.0 KiB
C
144 lines
5.0 KiB
C
/****************************************************************************
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* arch/arm/src/imxrt/imxrt_xbar.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_IMXRT_IMXRT_XBAR_H
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#define __ARCH_ARM_SRC_IMXRT_IMXRT_XBAR_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include "hardware/imxrt_xbar.h"
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#include "hardware/imxrt_memorymap.h"
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/* Collect correct XBAR definitions from chip file */
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#include "hardware/imxrt_xbar.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Cross Bars
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*
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* A cross bar is M muxes with I inputs
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*
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* There are 3 such cross bars switches:
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*
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* | XBARA1 | XBARAB2 | XBARB3 |
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* |---------+----------*---------|
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* | M | I | M | I | M | I |
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* |132 | 88 | 16 | 64 | 16 | 64 |
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*
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* Therefore there are M select fields that will be written to I values.
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* The M fields are know as SELn, there are 2 selects fields per register.
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*
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* A Input is wired to an output with a call to imxrt_xbar_connect(output,
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* input)
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*
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*/
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/* + ----------------- Which side of Mux Input or Output
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* | ++++------------- XBAR Index 0 - 2
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* v vvvv +++++++---- Index of input or output index
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* 000s xxxx nnnnnnnn
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*
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* Where side is used to parameter check the passed value in output is an
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* output XBAR is the index of the XBAR
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* input|output index - the index of the M mux (output) or I.
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*
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*/
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/* Input and Output Indexes */
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#define IMXRT_XBARA_IO_INDEX_SHIFTS 0
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#define IMXRT_XBARA_IO_INDEX_MASK (0xff << IMXRT_XBARA_IO_INDEX_SHIFTS)
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/* Index for xbar addresses */
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#define IMXRT_XBARA_INDEX_SHIFTS 8
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#define IMXRT_XBARA_INDEX_MASK (0xf << IMXRT_XBARA_INDEX_SHIFTS)
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# define IMXRT_XBARA1_INDEX (0 << IMXRT_XBARA_INDEX_SHIFTS)
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# define IMXRT_XBARA2_INDEX (1 << IMXRT_XBARA_INDEX_SHIFTS)
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# define IMXRT_XBARA3_INDEX (2 << IMXRT_XBARA_INDEX_SHIFTS)
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/* Side of xbar */
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#define IMXRT_XBARA_SIDE_SHIFTS 12
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#define IMXRT_XBARA_SIDE_MASK (0x1 << IMXRT_XBARA_SIDE_SHIFTS)
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#define XBAR_OUTPUT (0x1 << IMXRT_XBARA_SIDE_SHIFTS)
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#define XBAR_INPUT (0x0 << IMXRT_XBARA_SIDE_SHIFTS)
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/* xbar helpers */
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#define IMXRT_XBARA1(side, select) ((uint16_t)((side) | IMXRT_XBARA1_INDEX | \
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((select) & 0xff) << IMXRT_XBARA_IO_INDEX_SHIFTS))
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#define IMXRT_XBARA2(side, select) ((uint16_t)((side) | IMXRT_XBARA2_INDEX | \
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((select) & 0xff) << IMXRT_XBARA_IO_INDEX_SHIFTS))
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#define IMXRT_XBARA3(side, select) ((uint16_t)((side) | IMXRT_XBARA3_INDEX | \
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((select) & 0xff) << IMXRT_XBARA_IO_INDEX_SHIFTS))
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#define IMXRT_SEL(six) ((six) & IMXRT_XBARA_IO_INDEX_MASK) >> IMXRT_XBARA_IO_INDEX_SHIFTS
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#define IMXRT_XBAR(six) ((six) & IMXRT_XBARA_INDEX_MASK) >> IMXRT_XBARA_INDEX_SHIFTS
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#define IMXRT_SIDE(six) ((six) & IMXRT_XBARA_SIDE_MASK) >> IMXRT_XBARA_SIDE_SHIFTS
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/****************************************************************************
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* Public Functions Prototypes
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****************************************************************************/
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#ifndef __ASSEMBLY__
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Name: imxrt_xbar_connect
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*
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* Description:
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* This function maps the input_index of the cross bar to the output.
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*
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* input_index Parameters:
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* mux_index_out - XBAR Output and mux_index choice.
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* mux_index_input - XBAR Input and input_index choice.
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*
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* Returned Value:
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* OK on success; Negated errno on failure.
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*
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****************************************************************************/
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int imxrt_xbar_connect(uint16_t mux_out, uint16_t mux_input);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_SRC_IMXRT_IMXRT_XBAR_H */
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