1 // SPDX-License-Identifier: GPL-2.0+
3  * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
7 #include <spi-mem.h>
21 	if (op->data.nbytes) {  in spi_mem_exec_op()
22 		if (op->data.dir == SPI_MEM_DATA_IN)  in spi_mem_exec_op()
23 			rx_buf = op->data.buf.in;  in spi_mem_exec_op()
25 			tx_buf = op->data.buf.out;  in spi_mem_exec_op()
28 	op_len = sizeof(op->cmd.opcode) + op->addr.nbytes + op->dummy.nbytes;  in spi_mem_exec_op()
35 	op_buf[pos++] = op->cmd.opcode;  in spi_mem_exec_op()
37 	if (op->addr.nbytes) {  in spi_mem_exec_op()
38 		for (i = 0; i < op->addr.nbytes; i++)  in spi_mem_exec_op()
39 			op_buf[pos + i] = op->addr.val >>  in spi_mem_exec_op()
40 				(8 * (op->addr.nbytes - i - 1));  in spi_mem_exec_op()
42 		pos += op->addr.nbytes;  in spi_mem_exec_op()
45 	if (op->dummy.nbytes)  in spi_mem_exec_op()
46 		memset(op_buf + pos, 0xff, op->dummy.nbytes);  in spi_mem_exec_op()
60 		ret = spi_xfer(slave, op->data.nbytes * 8, tx_buf,  in spi_mem_exec_op()
70 	debug("| [%dB %s] ",  in spi_mem_exec_op()
71 	      tx_buf || rx_buf ? op->data.nbytes : 0,  in spi_mem_exec_op()
72 	      tx_buf || rx_buf ? (tx_buf ? "out" : "in") : "-");  in spi_mem_exec_op()
73 	for (i = 0; i < op->data.nbytes; i++)  in spi_mem_exec_op()
90 	len = sizeof(op->cmd.opcode) + op->addr.nbytes + op->dummy.nbytes;  in spi_mem_adjust_op_size()
91 	if (slave->max_write_size && len > slave->max_write_size)  in spi_mem_adjust_op_size()
92 		return -EINVAL;  in spi_mem_adjust_op_size()
94 	if (op->data.dir == SPI_MEM_DATA_IN && slave->max_read_size)  in spi_mem_adjust_op_size()
95 		op->data.nbytes = min(op->data.nbytes,  in spi_mem_adjust_op_size()
96 				      slave->max_read_size);  in spi_mem_adjust_op_size()
97 	else if (slave->max_write_size)  in spi_mem_adjust_op_size()
98 		op->data.nbytes = min(op->data.nbytes,  in spi_mem_adjust_op_size()
99 				      slave->max_write_size - len);  in spi_mem_adjust_op_size()
101 	if (!op->data.nbytes)  in spi_mem_adjust_op_size()
102 		return -EINVAL;  in spi_mem_adjust_op_size()