158 lines
6.9 KiB
C
158 lines
6.9 KiB
C
/**************************************************************************************************************************************************
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* arch/arm/src/imxrt/imxrt_abar.h
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*
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* Copyright (C) 2019 Gregory Nutt. All rights reserved.
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* Authors: Gregory Nutt <gnutt@nuttx.org>
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* David Sidrane <david_s5@nscdg.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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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/**************************************************************************************************************************************************
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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, 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 output
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* 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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/* Collect correct XBAR definitions from chip file */
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#include "hardware/imxrt_xbar.h"
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/**************************************************************************************************************************************************
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* Public Functions
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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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