Subversion Repositories Kolibri OS

/*

 * Copyright 2013 Advanced Micro Devices, Inc.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR

 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

 * OTHER DEALINGS IN THE SOFTWARE.

 *

 * Authors: Alex Deucher

 */

#include "drmP.h"

#include "radeon.h"

#include "cikd.h"

#include "kv_dpm.h"

int kv_notify_message_to_smu(struct radeon_device *rdev, u32 id)

{

	u32 i;

	u32 tmp = 0;

	WREG32(SMC_MESSAGE_0, id & SMC_MSG_MASK);

	for (i = 0; i < rdev->usec_timeout; i++) {

		if ((RREG32(SMC_RESP_0) & SMC_RESP_MASK) != 0)

			break;

		udelay(1);

	}

	tmp = RREG32(SMC_RESP_0) & SMC_RESP_MASK;

	if (tmp != 1) {

		if (tmp == 0xFF)

			return -EINVAL;

		else if (tmp == 0xFE)

			return -EINVAL;

	}

	return 0;

}

int kv_dpm_get_enable_mask(struct radeon_device *rdev, u32 *enable_mask)

{

	int ret;

	ret = kv_notify_message_to_smu(rdev, PPSMC_MSG_SCLKDPM_GetEnabledMask);

	if (ret == 0)

		*enable_mask = RREG32_SMC(SMC_SYSCON_MSG_ARG_0);

	return ret;

}

int kv_send_msg_to_smc_with_parameter(struct radeon_device *rdev,

				      PPSMC_Msg msg, u32 parameter)

{

	WREG32(SMC_MSG_ARG_0, parameter);

	return kv_notify_message_to_smu(rdev, msg);

}

static int kv_set_smc_sram_address(struct radeon_device *rdev,

				   u32 smc_address, u32 limit)

{

	if (smc_address & 3)

		return -EINVAL;

	if ((smc_address + 3) > limit)

		return -EINVAL;

	WREG32(SMC_IND_INDEX_0, smc_address);

	WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0);

	return 0;

}

int kv_read_smc_sram_dword(struct radeon_device *rdev, u32 smc_address,

			   u32 *value, u32 limit)

{

	int ret;

	ret = kv_set_smc_sram_address(rdev, smc_address, limit);

	if (ret)

		return ret;

	*value = RREG32(SMC_IND_DATA_0);

	return 0;

}

int kv_smc_dpm_enable(struct radeon_device *rdev, bool enable)

{

	if (enable)

		return kv_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Enable);

	else

		return kv_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Disable);

}

int kv_smc_bapm_enable(struct radeon_device *rdev, bool enable)

{

	if (enable)

		return kv_notify_message_to_smu(rdev, PPSMC_MSG_EnableBAPM);

	else

		return kv_notify_message_to_smu(rdev, PPSMC_MSG_DisableBAPM);

}

int kv_copy_bytes_to_smc(struct radeon_device *rdev,

			 u32 smc_start_address,

			 const u8 *src, u32 byte_count, u32 limit)

{

	int ret;

	u32 data, original_data, addr, extra_shift, t_byte, count, mask;

	if ((smc_start_address + byte_count) > limit)

		return -EINVAL;

	addr = smc_start_address;

	t_byte = addr & 3;

	/* RMW for the initial bytes */

	if  (t_byte != 0) {

		addr -= t_byte;

		ret = kv_set_smc_sram_address(rdev, addr, limit);

		if (ret)

			return ret;

		original_data = RREG32(SMC_IND_DATA_0);

		data = 0;

		mask = 0;

		count = 4;

		while (count > 0) {

			if (t_byte > 0) {

				mask = (mask << 8) | 0xff;

				t_byte--;

			} else if (byte_count > 0) {

				data = (data << 8) + *src++;

				byte_count--;

				mask <<= 8;

			} else {

				data <<= 8;

				mask = (mask << 8) | 0xff;

			}

			count--;

		}

		data |= original_data & mask;

		ret = kv_set_smc_sram_address(rdev, addr, limit);

		if (ret)

			return ret;

		WREG32(SMC_IND_DATA_0, data);

		addr += 4;

	}

	while (byte_count >= 4) {

		/* SMC address space is BE */

		data = (src[0] << 24) + (src[1] << 16) + (src[2] << 8) + src[3];

		ret = kv_set_smc_sram_address(rdev, addr, limit);

		if (ret)

			return ret;

		WREG32(SMC_IND_DATA_0, data);

		src += 4;

		byte_count -= 4;

		addr += 4;

	}

	/* RMW for the final bytes */

	if (byte_count > 0) {

		data = 0;

		ret = kv_set_smc_sram_address(rdev, addr, limit);

		if (ret)

			return ret;

		original_data= RREG32(SMC_IND_DATA_0);

		extra_shift = 8 * (4 - byte_count);

		while (byte_count > 0) {

			/* SMC address space is BE */

			data = (data << 8) + *src++;

			byte_count--;

		}

		data <<= extra_shift;

		data |= (original_data & ~((~0UL) << extra_shift));

		ret = kv_set_smc_sram_address(rdev, addr, limit);

		if (ret)

			return ret;

		WREG32(SMC_IND_DATA_0, data);

	}

	return 0;

}