65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
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/*
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* I2C - bitbanged generic gpio implementation
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*
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* Copyright (C) 2019 - 2020 Andy Green <andy@warmcat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* This is like an abstract class for gpio, a real implementation provides
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* functions for the ops that use the underlying OS gpio arrangements.
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*/
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#define LWSBBSPI_FLAG_USE_NCMD3 (1 << 7)
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#define LWSBBSPI_FLAG_USE_NCMD2 (1 << 6)
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#define LWSBBSPI_FLAG_USE_NCMD1 (1 << 5)
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#define LWSBBSPI_FLAG_USE_NCMD0 (1 << 4)
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#define LWSBBSPI_FLAG_USE_NCS3 (1 << 3)
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#define LWSBBSPI_FLAG_USE_NCS2 (1 << 2)
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#define LWSBBSPI_FLAG_USE_NCS1 (1 << 1)
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#define LWSBBSPI_FLAG_USE_NCS0 (1 << 0)
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#define LWS_SPI_BB_MAX_CH 4
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typedef struct lws_bb_spi {
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lws_spi_ops_t bb_ops; /* init to lws_bb_spi_ops */
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/* implementation-specific members */
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const lws_gpio_ops_t *gpio;
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_lws_plat_gpio_t clk;
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_lws_plat_gpio_t ncs[LWS_SPI_BB_MAX_CH];
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_lws_plat_gpio_t ncmd[LWS_SPI_BB_MAX_CH];
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_lws_plat_gpio_t mosi;
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_lws_plat_gpio_t miso;
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uint8_t unit;
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uint8_t flags;
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} lws_bb_spi_t;
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#define lws_bb_spi_ops \
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.init = lws_bb_spi_init, \
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.queue = lws_bb_spi_queue
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int
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lws_bb_spi_init(const lws_spi_ops_t *octx);
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int
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lws_bb_spi_queue(const lws_spi_ops_t *octx, const lws_spi_desc_t *desc);
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