4  * SPDX-License-Identifier: Apache-2.0
14 #include <zephyr/drivers/spi.h>
15 #include <zephyr/drivers/spi/rtio.h>
35 				struct spi_oc_simple_data *spi,  in spi_oc_simple_configure()  argument
41 	if (spi_context_configured(&spi->ctx, config)) {  in spi_oc_simple_configure()
46 	if (config->operation & SPI_HALF_DUPLEX) {  in spi_oc_simple_configure()
47 		LOG_ERR("Half-duplex not supported");  in spi_oc_simple_configure()
48 		return -ENOTSUP;  in spi_oc_simple_configure()
51 	/* Simple SPI only supports master mode */  in spi_oc_simple_configure()
52 	if (spi_context_is_slave(&spi->ctx)) {  in spi_oc_simple_configure()
54 		return -ENOTSUP;  in spi_oc_simple_configure()
57 	if ((config->operation & (SPI_MODE_LOOP | SPI_TRANSFER_LSB)) ||  in spi_oc_simple_configure()
59 	     (config->operation &  in spi_oc_simple_configure()
62 		return -EINVAL;  in spi_oc_simple_configure()
65 	/* SPI mode */  in spi_oc_simple_configure()
66 	if (SPI_MODE_GET(config->operation) & SPI_MODE_CPOL) {  in spi_oc_simple_configure()
70 	if (SPI_MODE_GET(config->operation) & SPI_MODE_CPHA) {  in spi_oc_simple_configure()
76 		if ((config->frequency << (i + 1)) >  in spi_oc_simple_configure()
85 	/* Configure and Enable SPI controller */  in spi_oc_simple_configure()
88 	spi->ctx.config = config;  in spi_oc_simple_configure()
98 	const struct spi_oc_simple_cfg *info = dev->config;  in spi_oc_simple_transceive()
99 	struct spi_oc_simple_data *spi = SPI_OC_SIMPLE_DATA(dev);  in spi_oc_simple_transceive()  local
100 	struct spi_context *ctx = &spi->ctx;  in spi_oc_simple_transceive()
107 	/* Lock the SPI Context */  in spi_oc_simple_transceive()
110 	spi_oc_simple_configure(info, spi, config);  in spi_oc_simple_transceive()
114 		spi_context_cs_control(&spi->ctx, true);  in spi_oc_simple_transceive()
116 		sys_write8(1 << config->slave, SPI_OC_SIMPLE_SPSS(info));  in spi_oc_simple_transceive()
128 				sys_write8(*ctx->tx_buf,  in spi_oc_simple_transceive()
144 				*ctx->rx_buf = rx_byte;  in spi_oc_simple_transceive()
150 	/* Clear chip-select */  in spi_oc_simple_transceive()
152 		spi_context_cs_control(&spi->ctx, false);  in spi_oc_simple_transceive()
154 		sys_write8(0 << config->slave, SPI_OC_SIMPLE_SPSS(info));  in spi_oc_simple_transceive()
172 	return -ENOTSUP;  in spi_oc_simple_transceive_async()
179 	spi_context_unlock_unconditionally(&SPI_OC_SIMPLE_DATA(dev)->ctx);  in spi_oc_simple_release()
183 static DEVICE_API(spi, spi_oc_simple_api) = {
198 	const struct spi_oc_simple_cfg *info = dev->config;  in spi_oc_simple_init()
199 	struct spi_oc_simple_data *data = dev->data;  in spi_oc_simple_init()
204 	err = spi_context_cs_configure_all(&data->ctx);  in spi_oc_simple_init()
210 	spi_context_unlock_unconditionally(&SPI_OC_SIMPLE_DATA(dev)->ctx);  in spi_oc_simple_init()