diff options
author | Duncan Laurie <dlaurie@google.com> | 2018-10-14 02:39:46 +0000 |
---|---|---|
committer | Patrick Georgi <pgeorgi@google.com> | 2018-10-18 15:01:27 +0000 |
commit | 26cf00ab498a78b59c9170d38d6ee7ced930259c (patch) | |
tree | ae300f5c0ff2b489db92493e1ba77c2ca1a82c93 /src/ec/google/common/mec.h | |
parent | c2ef1029fabfccbdd3e86c5f659f83109313c9f9 (diff) | |
download | coreboot-26cf00ab498a78b59c9170d38d6ee7ced930259c.tar.xz |
ec/google/common: Add a common MEC interface
In order to re-use the MEC interface code in the Chrome EC driver
move it to a common directory within the ec/google directory.
The Chrome EC driver itself is changed to use this interface in the
next commit, and future commits will introduce a new EC that also
uses this interface.
Change-Id: I13516b5e4c4c49f53bb998366284a26703142e2a
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/29111
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/ec/google/common/mec.h')
-rw-r--r-- | src/ec/google/common/mec.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/ec/google/common/mec.h b/src/ec/google/common/mec.h new file mode 100644 index 0000000000..3452bada7a --- /dev/null +++ b/src/ec/google/common/mec.h @@ -0,0 +1,43 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2018 Google LLC + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef EC_GOOGLE_COMMON_MEC_H +#define EC_GOOGLE_COMMON_MEC_H + +#include <stddef.h> +#include <stdint.h> + +/* Indicate read or write from MEC IO region */ +enum mec_io_type { + MEC_IO_READ, + MEC_IO_WRITE +}; + +/* + * mec_io_bytes - Read / write bytes to MEC EMI port + * + * @type: Indicate read or write operation + * @base: Base address for MEC EMI region + * @offset: Base read / write address + * @buffer: Destination / source buffer + * @size: Number of bytes to read / write + * + * @returns 8-bit checksum of all bytes read or written + */ + +uint8_t mec_io_bytes(enum mec_io_type type, uint16_t base, + uint16_t offset, void *buffer, size_t size); + +#endif /* EC_GOOGLE_COMMON_MEC_H */ |