effaf8fcb8
As discussed on the mailing list and voted upon, the coreboot project is going to move the majority of copyrights out of the headers and into an AUTHORS file. This will happen a bit at a time, as we'll be unifying license headers at the same time. Updated Authors file is in a separate commit. Signed-off-by: Martin Roth <martin@coreboot.org> Change-Id: Ia0a07df6ca1fdaa2837ce8839057057cbd44d157 Reviewed-on: https://review.coreboot.org/c/coreboot/+/36181 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <spi-generic.h>
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#include <spi_flash.h>
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#include <console/spi.h>
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static struct spi_slave slave;
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void spiconsole_init(void) {
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spi_init();
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spi_setup_slave(0, 0, &slave);
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return;
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}
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/*
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* The EM100 'hyper terminal' specification defines a header of 9 characters.
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* Because of this, devices with a spi_crop_chunk of less than 10 characters
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* can't be supported by this standard.
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*
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* To add support in romstage, the static struct here and the ones used by
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* spi_xfer will need to be modified - removed, or mapped into cbmem.
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*
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* Because the Dediprog software expects strings, not single characters, and
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* because of the header overhead, this builds up a buffer to send.
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*/
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void spiconsole_tx_byte(unsigned char c) {
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static struct em100_msg msg = {
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.header.spi_command = EM100_DEDICATED_CMD,
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.header.em100_command = EM100_UFIFO_CMD,
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.header.msg_signature = EM100_MSG_SIGNATURE,
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.header.msg_type = EM100_MSG_ASCII,
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.header.msg_length = 0
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};
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/* Verify the spi buffer is big enough to send even a single byte */
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if (spi_crop_chunk(&slave, 0, MAX_MSG_LENGTH) <
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sizeof(struct em100_msg_header) + 1)
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return;
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msg.data[msg.header.msg_length] = c;
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msg.header.msg_length++;
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/* Send the data on newline or when the max spi length is reached */
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if (c == '\n' || (sizeof(struct em100_msg_header) +
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msg.header.msg_length == spi_crop_chunk(&slave, 0,
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MAX_MSG_LENGTH))) {
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spi_xfer(&slave, &msg, sizeof(struct em100_msg_header) +
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msg.header.msg_length, NULL, 0);
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msg.header.msg_length = 0;
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}
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return;
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}
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