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128 lines
3.3 KiB
128 lines
3.3 KiB
/*
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* pcm.c
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*
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* Copyright (c) 2014 Jeremy Garff <jer @ jers.net>
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* PCM version Copyright (c) 2016 Ton van Overbeek <tvoverbeek @ gmail.com>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are permitted
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* provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* 3. Neither the name of the owner nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <stdint.h>
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#include "pcm.h"
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// Mapping of Pin to alternate function for PCM_CLK
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const pcm_pin_table_t pcm_pin_clk[] =
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{
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{
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.pinnum = 18,
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.altnum = 0,
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},
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{
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.pinnum = 28,
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.altnum = 2,
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},
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};
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// Mapping of Pin to alternate function for PCM_FS
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const pcm_pin_table_t pcm_pin_fs[] =
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{
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{
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.pinnum = 19,
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.altnum = 0,
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},
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{
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.pinnum = 29,
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.altnum = 2,
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},
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};
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// Mapping of Pin to alternate function for PCM_DIN
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const pcm_pin_table_t pcm_pin_din[] =
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{
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{
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.pinnum = 20,
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.altnum = 0,
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},
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{
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.pinnum = 30,
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.altnum = 2,
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},
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};
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// Mapping of Pin to alternate function for PCM_DOUT
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const pcm_pin_table_t pcm_pin_dout[] =
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{
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{
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.pinnum = 21,
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.altnum = 0,
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},
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{
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.pinnum = 31,
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.altnum = 2,
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},
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};
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const pcm_pin_tables_t pcm_pin_tables[NUM_PCMFUNS] =
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{
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{
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.pins = pcm_pin_clk,
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.count = sizeof(pcm_pin_clk) / sizeof(pcm_pin_clk[0]),
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},
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{
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.pins = pcm_pin_fs,
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.count = sizeof(pcm_pin_fs) / sizeof(pcm_pin_fs[0]),
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},
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{
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.pins = pcm_pin_din,
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.count = sizeof(pcm_pin_din) / sizeof(pcm_pin_din[0]),
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},
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{
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.pins = pcm_pin_dout,
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.count = sizeof(pcm_pin_dout) / sizeof(pcm_pin_dout[0]),
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},
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};
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int pcm_pin_alt(int pcmfun, int pinnum)
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{
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if (pcmfun < 0 || pcmfun > 3) {
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return -1;
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}
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const pcm_pin_tables_t *pintable = &pcm_pin_tables[pcmfun];
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int i;
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for (i = 0; i < pintable->count; i++)
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{
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if (pintable->pins[i].pinnum == pinnum)
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{
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return pintable->pins[i].altnum;
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}
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}
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return -1;
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}
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