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/*
* Copyright © 2012 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:
* Vijay Purushothaman <vijay.a.purushothaman@intel.com>
*
*/
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <err.h>
#include <string.h>
#include "intel_gpu_tools.h"
static void usage(char *cmdname)
{
printf("Warning : This program will work only on Valleyview\n");
printf("Usage: %s addr value\n", cmdname);
printf("\t addr : in 0xXXXX format\n");
}
int main(int argc, char** argv)
{
int ret = 0;
uint32_t reg, val, tmp;
char *cmdname = strdup(argv[0]);
struct pci_device *dev = intel_get_pci_device();
if (argc != 3 || !IS_VALLEYVIEW(dev->device_id)) {
usage(cmdname);
ret = 1;
goto out;
}
sscanf(argv[1], "0x%x", ®);
sscanf(argv[2], "0x%x", &val);
intel_register_access_init(dev, 0);
intel_punit_read(reg, &tmp);
printf("Value before: 0x%X\n", tmp);
ret = intel_punit_write(reg, val);
if (ret)
fprintf(stderr, "Punit write failed: %d\n", ret);
intel_punit_read(reg, &tmp);
printf("Value after: 0x%X\n", tmp);
intel_register_access_fini();
out:
free(cmdname);
return ret;
}
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