1/*
2 * Copyright 2012 Advanced Micro Devices, Inc.
3 *
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:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 */
23
24#include "radeon.h"
25#include "trinityd.h"
26#include "trinity_dpm.h"
27#include "ppsmc.h"
28
29static int trinity_notify_message_to_smu(struct radeon_device *rdev, u32 id)
30{
31	int i;
32	u32 v = 0;
33
34	WREG32(SMC_MESSAGE_0, id);
35	for (i = 0; i < rdev->usec_timeout; i++) {
36		if (RREG32(SMC_RESP_0) != 0)
37			break;
38		udelay(1);
39	}
40	v = RREG32(SMC_RESP_0);
41
42	if (v != 1) {
43		if (v == 0xFF) {
44			DRM_ERROR("SMC failed to handle the message!\n");
45			return -EINVAL;
46		} else if (v == 0xFE) {
47			DRM_ERROR("Unknown SMC message!\n");
48			return -EINVAL;
49		}
50	}
51
52	return 0;
53}
54
55int trinity_dpm_bapm_enable(struct radeon_device *rdev, bool enable)
56{
57	if (enable)
58		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_EnableBAPM);
59	else
60		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DisableBAPM);
61}
62
63int trinity_dpm_config(struct radeon_device *rdev, bool enable)
64{
65	if (enable)
66		WREG32_SMC(SMU_SCRATCH0, 1);
67	else
68		WREG32_SMC(SMU_SCRATCH0, 0);
69
70	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Config);
71}
72
73int trinity_dpm_force_state(struct radeon_device *rdev, u32 n)
74{
75	WREG32_SMC(SMU_SCRATCH0, n);
76
77	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_ForceState);
78}
79
80int trinity_dpm_n_levels_disabled(struct radeon_device *rdev, u32 n)
81{
82	WREG32_SMC(SMU_SCRATCH0, n);
83
84	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_N_LevelsDisabled);
85}
86
87int trinity_uvd_dpm_config(struct radeon_device *rdev)
88{
89	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_UVD_DPM_Config);
90}
91
92int trinity_dpm_no_forced_level(struct radeon_device *rdev)
93{
94	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_NoForcedLevel);
95}
96
97int trinity_dce_enable_voltage_adjustment(struct radeon_device *rdev,
98					  bool enable)
99{
100	if (enable)
101		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_AllowVoltageAdjustment);
102	else
103		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_RemoveVoltageAdjustment);
104}
105
106int trinity_gfx_dynamic_mgpg_config(struct radeon_device *rdev)
107{
108	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_PG_SIMD_Config);
109}
110
111void trinity_acquire_mutex(struct radeon_device *rdev)
112{
113	int i;
114
115	WREG32(SMC_INT_REQ, 1);
116	for (i = 0; i < rdev->usec_timeout; i++) {
117		if ((RREG32(SMC_INT_REQ) & 0xffff) == 1)
118			break;
119		udelay(1);
120	}
121}
122
123void trinity_release_mutex(struct radeon_device *rdev)
124{
125	WREG32(SMC_INT_REQ, 0);
126}
127