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}