mirror of
https://github.com/AsahiLinux/u-boot
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898e76c938
Renamed: spi_flash.c -> sf.c spi_flash_internal.h -> sf_internal.h spi_flash_ops.c -> sf_ops.c spi_flash_probe.c -> sf_probe.c Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
/*
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* SPI flash interface
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*
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* Copyright (C) 2008 Atmel Corporation
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* Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <common.h>
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#include <spi.h>
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static int spi_flash_read_write(struct spi_slave *spi,
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const u8 *cmd, size_t cmd_len,
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const u8 *data_out, u8 *data_in,
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size_t data_len)
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{
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unsigned long flags = SPI_XFER_BEGIN;
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int ret;
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if (data_len == 0)
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flags |= SPI_XFER_END;
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ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
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if (ret) {
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debug("SF: Failed to send command (%zu bytes): %d\n",
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cmd_len, ret);
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} else if (data_len != 0) {
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ret = spi_xfer(spi, data_len * 8, data_out, data_in,
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SPI_XFER_END);
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if (ret)
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debug("SF: Failed to transfer %zu bytes of data: %d\n",
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data_len, ret);
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}
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return ret;
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}
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int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
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size_t cmd_len, void *data, size_t data_len)
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{
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return spi_flash_read_write(spi, cmd, cmd_len, NULL, data, data_len);
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}
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int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len)
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{
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return spi_flash_cmd_read(spi, &cmd, 1, response, len);
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}
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int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
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const void *data, size_t data_len)
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{
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return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);
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}
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