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/*
* Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdlib.h>
#include <lib/bakery_lock.h>
#include <sci/sci_scfw.h>
#include <sci/sci_ipc.h>
#include <sci/sci_rpc.h>
#include "imx8_mu.h"
sc_ipc_t ipc_handle;
DEFINE_BAKERY_LOCK(sc_ipc_bakery_lock);
#define sc_ipc_lock_init() bakery_lock_init(&sc_ipc_bakery_lock)
#define sc_ipc_lock() bakery_lock_get(&sc_ipc_bakery_lock)
#define sc_ipc_unlock() bakery_lock_release(&sc_ipc_bakery_lock)
void sc_call_rpc(sc_ipc_t ipc, sc_rpc_msg_t *msg, bool no_resp)
{
sc_ipc_lock();
sc_ipc_write(ipc, msg);
if (!no_resp)
sc_ipc_read(ipc, msg);
sc_ipc_unlock();
}
sc_err_t sc_ipc_open(sc_ipc_t *ipc, sc_ipc_id_t id)
{
uint32_t base = id;
uint32_t i;
/* Get MU base associated with IPC channel */
if ((ipc == NULL) || (base == 0))
return SC_ERR_IPC;
sc_ipc_lock_init();
/* Init MU */
MU_Init(base);
/* Enable all RX interrupts */
for (i = 0; i < MU_RR_COUNT; i++) {
MU_EnableRxFullInt(base, i);
}
/* Return MU address as handle */
*ipc = (sc_ipc_t) id;
return SC_ERR_NONE;
}
void sc_ipc_close(sc_ipc_t ipc)
{
uint32_t base = ipc;
if (base != 0)
MU_Init(base);
}
void sc_ipc_read(sc_ipc_t ipc, void *data)
{
uint32_t base = ipc;
sc_rpc_msg_t *msg = (sc_rpc_msg_t *) data;
uint8_t count = 0;
/* Check parms */
if ((base == 0) || (msg == NULL))
return;
/* Read first word */
MU_ReceiveMsg(base, 0, (uint32_t *) msg);
count++;
/* Check size */
if (msg->size > SC_RPC_MAX_MSG) {
*((uint32_t *) msg) = 0;
return;
}
/* Read remaining words */
while (count < msg->size) {
MU_ReceiveMsg(base, count % MU_RR_COUNT,
&(msg->DATA.u32[count - 1]));
count++;
}
}
void sc_ipc_write(sc_ipc_t ipc, void *data)
{
sc_rpc_msg_t *msg = (sc_rpc_msg_t *) data;
uint32_t base = ipc;
uint8_t count = 0;
/* Check parms */
if ((base == 0) || (msg == NULL))
return;
/* Check size */
if (msg->size > SC_RPC_MAX_MSG)
return;
/* Write first word */
MU_SendMessage(base, 0, *((uint32_t *) msg));
count++;
/* Write remaining words */
while (count < msg->size) {
MU_SendMessage(base, count % MU_TR_COUNT,
msg->DATA.u32[count - 1]);
count++;
}
}
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