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/*
* Copyright © 2013 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* Ville Syrjälä <ville.syrjala@linux.intel.com>
*
*/
#include <assert.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/io.h>
#include "intel_io.h"
#include "intel_chipset.h"
static void write_reg(uint32_t reg, uint8_t val, bool use_mmio)
{
if (use_mmio)
*((volatile uint8_t *)mmio + reg) = val;
else
outb(val, reg);
}
static void usage(const char *cmdname)
{
printf("Usage: %s [-m] addr value\n", cmdname);
printf("\t -m : use MMIO instead of port IO\n");
printf("\t addr,value : in 0xXXXX format\n");
}
int main(int argc, char *argv[])
{
bool use_mmio = false;
int ret = 0;
uint32_t reg, val;
int ch;
const char *cmdname = argv[0];
while ((ch = getopt(argc, argv, "m")) != -1) {
switch(ch) {
case 'm':
use_mmio = true;
break;
default:
break;
}
}
argc -= optind;
argv += optind;
if (argc < 2) {
usage(cmdname);
return 1;
}
sscanf(argv[0], "0x%x", ®);
sscanf(argv[1], "0x%x", &val);
if (use_mmio)
intel_register_access_init(intel_get_pci_device(), 0);
else
assert(iopl(3) == 0);
write_reg(reg, val, use_mmio);
if (use_mmio)
intel_register_access_fini();
else
iopl(0);
return ret;
}
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