2 * Copyright © 2014 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
30 #include "intel_chipset.h"
32 static void usage(const char *name)
34 printf("Warning : This program will work only on Valleyview\n"
35 "Usage: %s <port> <reg> <val>\n"
36 "\t port/reg/val : in 0xXXXX format\n",
40 int main(int argc, char** argv)
42 uint32_t port, reg, val, tmp;
43 struct pci_device *dev = intel_get_pci_device();
45 if (argc != 4 || !IS_VALLEYVIEW(dev->device_id)) {
50 port = strtoul(argv[1], NULL, 16);
51 reg = strtoul(argv[2], NULL, 16);
52 val = strtoul(argv[3], NULL, 16);
54 intel_register_access_init(dev, 0);
56 tmp = intel_iosf_sb_read(port, reg);
57 printf("Value before: 0x%X\n", tmp);
59 intel_iosf_sb_write(port, reg, val);
61 tmp = intel_iosf_sb_read(port, reg);
62 printf("Value after: 0x%X\n", tmp);
64 intel_register_access_fini();