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 =
23		pci_get_domain_bus_and_slot(pci_domain_nr(dev->pdev->bus),
24					    0, 0);
25	struct drm_psb_private *dev_priv = dev->dev_private;
26
27	/*pci_write_config_dword(pci_root, 0xD4, 0x00C32004);*/
28	/*pci_write_config_dword(pci_root, 0xD0, 0xE0033000);*/
29
30	pci_write_config_dword(pci_root, 0xD0, 0xD0050300);
31	pci_read_config_dword(pci_root, 0xD4, &clock);
32	pci_dev_put(pci_root);
33
34	switch (clock & 0x07) {
35	case 0:
36		dev_priv->core_freq = 100;
37		break;
38	case 1:
39		dev_priv->core_freq = 133;
40		break;
41	case 2:
42		dev_priv->core_freq = 150;
43		break;
44	case 3:
45		dev_priv->core_freq = 178;
46		break;
47	case 4:
48		dev_priv->core_freq = 200;
49		break;
50	case 5:
51	case 6:
52	case 7:
53		dev_priv->core_freq = 266;
54		break;
55	default:
56		dev_priv->core_freq = 0;
57	}
58}