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 "drmP.h"
25#include "radeon.h"
26#include "trinityd.h"
27#include "trinity_dpm.h"
28#include "ppsmc.h"
29
30static int trinity_notify_message_to_smu(struct radeon_device *rdev, u32 id)
31{
32	int i;
33	u32 v = 0;
34
35	WREG32(SMC_MESSAGE_0, id);
36	for (i = 0; i < rdev->usec_timeout; i++) {
37		if (RREG32(SMC_RESP_0) != 0)
38			break;
39		udelay(1);
40	}
41	v = RREG32(SMC_RESP_0);
42
43	if (v != 1) {
44		if (v == 0xFF) {
45			DRM_ERROR("SMC failed to handle the message!\n");
46			return -EINVAL;
47		} else if (v == 0xFE) {
48			DRM_ERROR("Unknown SMC message!\n");
49			return -EINVAL;
50		}
51	}
52
53	return 0;
54}
55
56int trinity_dpm_bapm_enable(struct radeon_device *rdev, bool enable)
57{
58	if (enable)
59		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_EnableBAPM);
60	else
61		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DisableBAPM);
62}
63
64int trinity_dpm_config(struct radeon_device *rdev, bool enable)
65{
66	if (enable)
67		WREG32_SMC(SMU_SCRATCH0, 1);
68	else
69		WREG32_SMC(SMU_SCRATCH0, 0);
70
71	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Config);
72}
73
74int trinity_dpm_force_state(struct radeon_device *rdev, u32 n)
75{
76	WREG32_SMC(SMU_SCRATCH0, n);
77
78	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_ForceState);
79}
80
81int trinity_dpm_n_levels_disabled(struct radeon_device *rdev, u32 n)
82{
83	WREG32_SMC(SMU_SCRATCH0, n);
84
85	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_N_LevelsDisabled);
86}
87
88int trinity_uvd_dpm_config(struct radeon_device *rdev)
89{
90	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_UVD_DPM_Config);
91}
92
93int trinity_dpm_no_forced_level(struct radeon_device *rdev)
94{
95	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_NoForcedLevel);
96}
97
98int trinity_dce_enable_voltage_adjustment(struct radeon_device *rdev,
99					  bool enable)
100{
101	if (enable)
102		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_AllowVoltageAdjustment);
103	else
104		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_RemoveVoltageAdjustment);
105}
106
107int trinity_gfx_dynamic_mgpg_config(struct radeon_device *rdev)
108{
109	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_PG_SIMD_Config);
110}
111
112void trinity_acquire_mutex(struct radeon_device *rdev)
113{
114	int i;
115
116	WREG32(SMC_INT_REQ, 1);
117	for (i = 0; i < rdev->usec_timeout; i++) {
118		if ((RREG32(SMC_INT_REQ) & 0xffff) == 1)
119			break;
120		udelay(1);
121	}
122}
123
124void trinity_release_mutex(struct radeon_device *rdev)
125{
126	WREG32(SMC_INT_REQ, 0);
127}
128