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| /*
| * SPI flash interface
| *
| * Copyright (C) 2008 Atmel Corporation
| * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
| *
| * SPDX-License-Identifier: GPL-2.0+
| */
|
| #include <common.h>
| #include <spi.h>
|
| static int spi_flash_read_write(struct spi_slave *spi,
| const u8 *cmd, size_t cmd_len,
| const u8 *data_out, u8 *data_in,
| size_t data_len)
| {
| unsigned long flags = SPI_XFER_BEGIN;
| int ret;
|
| if (data_len == 0)
| flags |= SPI_XFER_END;
|
| ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
| if (ret) {
| debug("SF: Failed to send command (%zu bytes): %d\n",
| cmd_len, ret);
| } else if (data_len != 0) {
| ret = spi_xfer(spi, data_len * 8, data_out, data_in,
| SPI_XFER_END);
| if (ret)
| debug("SF: Failed to transfer %zu bytes of data: %d\n",
| data_len, ret);
| }
|
| return ret;
| }
|
| int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
| size_t cmd_len, void *data, size_t data_len)
| {
| return spi_flash_read_write(spi, cmd, cmd_len, NULL, data, data_len);
| }
|
| int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len)
| {
| return spi_flash_cmd_read(spi, &cmd, 1, response, len);
| }
|
| int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
| const void *data, size_t data_len)
| {
| return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);
| }
|
|
