1/**************************************************************************
2 * Copyright (c) 2011, Intel Corporation.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12 * more details.
13 *
14 **************************************************************************/
15
16#include <drm/drmP.h>
17#include "psb_drv.h"
18
19void gma_get_core_freq(struct drm_device *dev)
20{
21	uint32_t clock;
22	struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
23	struct drm_psb_private *dev_priv = dev->dev_private;
24
25	/*pci_write_config_dword(pci_root, 0xD4, 0x00C32004);*/
26	/*pci_write_config_dword(pci_root, 0xD0, 0xE0033000);*/
27
28	pci_write_config_dword(pci_root, 0xD0, 0xD0050300);
29	pci_read_config_dword(pci_root, 0xD4, &clock);
30	pci_dev_put(pci_root);
31
32	switch (clock & 0x07) {
33	case 0:
34		dev_priv->core_freq = 100;
35		break;
36	case 1:
37		dev_priv->core_freq = 133;
38		break;
39	case 2:
40		dev_priv->core_freq = 150;
41		break;
42	case 3:
43		dev_priv->core_freq = 178;
44		break;
45	case 4:
46		dev_priv->core_freq = 200;
47		break;
48	case 5:
49	case 6:
50	case 7:
51		dev_priv->core_freq = 266;
52		break;
53	default:
54		dev_priv->core_freq = 0;
55	}
56}
57