mirror of
https://github.com/wessel-novacustom/clevo-keyboard.git
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d035d7afb0
tuxedo-cc-mwi symbols now used in many places. Until further aggregation some wrappers are needed for clarity.
103 lines
2.7 KiB
C
103 lines
2.7 KiB
C
/*
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* uw_io.h
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*
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* Copyright (C) 2018-2020 TUXEDO Computers GmbH <tux@tuxedocomputers.com>
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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; either version 2 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef UW_IO_H
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#define UW_IO_H
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#include <linux/kernel.h>
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#include <linux/module.h>
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union uw_ec_read_return {
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u32 dword;
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struct {
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u8 data_low;
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u8 data_high;
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} bytes;
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};
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union uw_ec_write_return {
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u32 dword;
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struct {
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u8 addr_low;
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u8 addr_high;
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u8 data_low;
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u8 data_high;
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} bytes;
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};
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typedef u32 (uw_ec_read_func)(u8, u8, union uw_ec_read_return *);
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typedef u32 (uw_ec_write_func)(u8, u8, u8, u8, union uw_ec_write_return *);
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extern uw_ec_read_func uw_ec_read_addr;
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extern uw_ec_write_func uw_ec_write_addr;
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/**
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* uw ec read from tccwmi for now stuffed in this wrapper for simplification
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*
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* @returns The result of the tccwmi function, or -ENOENT
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* if tccwmi symbol is not accessible
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*/
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static u32 __uw_ec_read_addr(u8 addr_low, u8 addr_high,
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union uw_ec_read_return *output)
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{
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uw_ec_read_func *symbol_uw_ec_read_addr;
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u32 result = 0;
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symbol_uw_ec_read_addr = symbol_get(uw_ec_read_addr);
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if (symbol_uw_ec_read_addr) {
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result = symbol_uw_ec_read_addr(addr_low, addr_high, output);
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} else {
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pr_debug("tuxedo-cc-wmi symbols not found\n");
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result = -ENOENT;
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}
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if (symbol_uw_ec_read_addr)
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symbol_put(uw_ec_read_addr);
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return result;
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}
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/**
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* uw ec write from tccwmi for now stuffed in this wrapper for simplification
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*
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* @returns The result of the tccwmi function, or -ENOENT
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* if tccwmi symbol is not accessible
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*/
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static u32 __uw_ec_write_addr(u8 addr_low, u8 addr_high, u8 data_low,
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u8 data_high, union uw_ec_write_return *output)
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{
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uw_ec_write_func *symbol_uw_ec_write_addr;
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u32 result = 0;
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symbol_uw_ec_write_addr = symbol_get(uw_ec_write_addr);
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if (symbol_uw_ec_write_addr) {
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result = symbol_uw_ec_write_addr(addr_low, addr_high, data_low,
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data_high, output);
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} else {
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pr_debug("tuxedo-cc-wmi symbols not found\n");
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result = -ENOENT;
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}
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if (symbol_uw_ec_write_addr)
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symbol_put(uw_ec_write_addr);
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return result;
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}
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#endif
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