4  * SPDX-License-Identifier: Apache-2.0
44 	const struct spi_litex_dev_config *dev_config = dev->config;  in spi_litex_set_frequency()
46 	if (!dev_config->phy_clk_divisor_exists) {  in spi_litex_set_frequency()
52 	uint32_t divisor = DIV_ROUND_UP(sys_clock_hw_cycles_per_sec(), (2 * config->frequency)) - 1;  in spi_litex_set_frequency()
54 	litex_write32(divisor, dev_config->phy_clk_divisor_addr);  in spi_litex_set_frequency()
61 	struct spi_litex_data *dev_data = dev->data;  in spi_config()
63 	if (config->slave != 0) {  in spi_config()
64 		if (config->slave >= SPI_MAX_CS_SIZE) {  in spi_config()
66 			return -ENOTSUP;  in spi_config()
70 	if (config->operation & SPI_HALF_DUPLEX) {  in spi_config()
71 		LOG_ERR("Half-duplex not supported");  in spi_config()
72 		return -ENOTSUP;  in spi_config()
75 	if (SPI_WORD_SIZE_GET(config->operation) > SPI_MAX_WORD_SIZE) {  in spi_config()
77 			SPI_WORD_SIZE_GET(config->operation));  in spi_config()
78 		return -ENOTSUP;  in spi_config()
81 	if (config->operation & SPI_CS_ACTIVE_HIGH) {  in spi_config()
83 		return -ENOTSUP;  in spi_config()
86 	if (config->operation & SPI_LOCK_ON) {  in spi_config()
88 		return -ENOTSUP;  in spi_config()
92 	    (config->operation & SPI_LINES_MASK) != SPI_LINES_SINGLE) {  in spi_config()
94 		return -ENOTSUP;  in spi_config()
97 	if (config->operation & SPI_TRANSFER_LSB) {  in spi_config()
99 		return -ENOTSUP;  in spi_config()
102 	if (config->operation & (SPI_MODE_CPOL | SPI_MODE_CPHA)) {  in spi_config()
104 		return -ENOTSUP;  in spi_config()
107 	if (config->operation & SPI_OP_MODE_SLAVE) {  in spi_config()
109 		return -ENOTSUP;  in spi_config()
112 	if (config->operation & SPI_MODE_LOOP) {  in spi_config()
114 		return -ENOTSUP;  in spi_config()
117 	dev_data->dfs = get_dfs_value(config);  in spi_config()
139 	const struct spi_litex_dev_config *dev_config = dev->config;  in spi_litex_xfer()
140 	struct spi_litex_data *data = dev->data;  in spi_litex_xfer()
141 	struct spi_context *ctx = &data->ctx;  in spi_litex_xfer()
145 	uint8_t len = data->dfs; /* SPI Xfer length*/  in spi_litex_xfer()
146 	uint8_t old_len = len;   /* old SPI Xfer length*/  in spi_litex_xfer()
147 	uint8_t width = BIT(0);  /* SPI Xfer width*/  in spi_litex_xfer()
148 	uint8_t mask = BIT(0);   /* SPI Xfer mask*/  in spi_litex_xfer()
150 	spiflash_len_mask_width_write(len * 8, width, mask, dev_config->core_master_phyconfig_addr);  in spi_litex_xfer()
152 	litex_write32(BIT(config->slave), dev_config->core_master_cs_addr);  in spi_litex_xfer()
155 	while ((litex_read8(dev_config->core_master_status_addr) &  in spi_litex_xfer()
157 		rxd = litex_read32(dev_config->core_master_rxtx_addr);  in spi_litex_xfer()
162 		len = MIN(spi_context_max_continuous_chunk(ctx), dev_config->core_master_rxtx_size);  in spi_litex_xfer()
165 						      dev_config->core_master_phyconfig_addr);  in spi_litex_xfer()
170 			litex_spi_tx_put(len, &txd, ctx->tx_buf);  in spi_litex_xfer()
175 		while (!(litex_read8(dev_config->core_master_status_addr) &  in spi_litex_xfer()
181 		litex_write32(txd, dev_config->core_master_rxtx_addr);  in spi_litex_xfer()
183 		spi_context_update_tx(ctx, data->dfs, len / data->dfs);  in spi_litex_xfer()
185 		while (!(litex_read8(dev_config->core_master_status_addr) &  in spi_litex_xfer()
190 		rxd = litex_read32(dev_config->core_master_rxtx_addr);  in spi_litex_xfer()
194 			litex_spi_rx_put(len, &rxd, ctx->rx_buf);  in spi_litex_xfer()
197 		spi_context_update_rx(ctx, data->dfs, len / data->dfs);  in spi_litex_xfer()
201 	litex_write32(0, dev_config->core_master_cs_addr);  in spi_litex_xfer()
212 	struct spi_litex_data *data = dev->data;  in spi_litex_transceive()
224 	spi_context_buffers_setup(&data->ctx, tx_bufs, rx_bufs, data->dfs);  in spi_litex_transceive()
237 	return -ENOTSUP;  in spi_litex_transceive_async()
248 static DEVICE_API(spi, spi_litex_api) = {