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}