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/*
* ***************************************************************************
* Copyright (C) 2016 Marvell International Ltd.
* ***************************************************************************
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of Marvell nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
***************************************************************************
*/
#include <debug.h>
#include <string.h>
#include <mss_ipc_drv.h>
#include <mmio.h>
#define IPC_MSG_BASE_MASK MVEBU_REGS_BASE_MASK
unsigned long mv_pm_ipc_msg_base;
unsigned int mv_pm_ipc_num_of_ch;
unsigned int mv_pm_ipc_channel_size;
unsigned int mv_pm_ipc_queue_size;
/*******************************************************************************
* mss_pm_ipc_init
*
* DESCRIPTION: Initialize PM IPC infrastructure
******************************************************************************
*/
int mv_pm_ipc_init(unsigned long ipc_control_addr)
{
struct mss_pm_ipc_ctrl *ipc_control =
(struct mss_pm_ipc_ctrl *)ipc_control_addr;
/* Initialize PM IPC control block */
mv_pm_ipc_msg_base = ipc_control->msg_base_address |
IPC_MSG_BASE_MASK;
mv_pm_ipc_num_of_ch = ipc_control->num_of_channels;
mv_pm_ipc_channel_size = ipc_control->channel_size;
mv_pm_ipc_queue_size = ipc_control->queue_size;
return 0;
}
/*******************************************************************************
* mv_pm_ipc_queue_addr_get
*
* DESCRIPTION: Returns the IPC queue address
******************************************************************************
*/
unsigned int mv_pm_ipc_queue_addr_get(unsigned int channel_id,
unsigned int direction)
{
return (unsigned int)(mv_pm_ipc_msg_base +
(channel_id * mv_pm_ipc_channel_size) +
(direction * mv_pm_ipc_queue_size));
}
/*******************************************************************************
* mv_pm_ipc_msg_rx
*
* DESCRIPTION: Retrieve message from IPC channel
******************************************************************************
*/
int mv_pm_ipc_msg_rx(unsigned int channel_id, unsigned int direction,
struct mss_pm_ipc_msg *msg)
{
unsigned int addr = mv_pm_ipc_queue_addr_get(channel_id, direction);
msg->msg_reply = mmio_read_32(addr + IPC_MSG_REPLY_LOC);
return 0;
}
/*******************************************************************************
* mss_pm_ipc_msg_reply
*
* DESCRIPTION: Send message via IPC channel
******************************************************************************
*/
int mv_pm_ipc_msg_tx(unsigned int channel_id, unsigned int direction,
unsigned int cluster_power_state)
{
unsigned int addr = mv_pm_ipc_queue_addr_get(channel_id, direction);
mmio_write_32(addr + IPC_MSG_POWER_STATE_LOC, cluster_power_state);
mmio_write_32(addr + IPC_MSG_STATE_LOC, IPC_MSG_OCCUPY);
return 0;
}
/*******************************************************************************
* mv_pm_ipc_msg_validate
*
* DESCRIPTION: Validate IPC channel state
******************************************************************************
*/
int mv_pm_ipc_msg_validate(unsigned int channel_id, unsigned int direction,
unsigned int state)
{
unsigned int addr = mv_pm_ipc_queue_addr_get(channel_id, direction);
if (mmio_read_32(addr + IPC_MSG_STATE_LOC) != state)
return -1;
return 0;
}
/*******************************************************************************
* mv_pm_ipc_msg_update
*
* DESCRIPTION: Update IPC channel state
******************************************************************************
*/
int mv_pm_ipc_msg_update(unsigned int channel_id, unsigned int direction,
unsigned int state)
{
unsigned int addr = mv_pm_ipc_queue_addr_get(channel_id, direction);
mmio_write_32(addr + IPC_MSG_STATE_LOC, state);
return 0;
}
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