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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 Marvell, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <arch/io.h>
#include <console/console.h>
#include <soc/gic.h>
#include <soc/mcu.h>
static u8 mvmap2315_calc_checksum(const void *data, u32 size)
{
u8 csum;
const u8 *bytes = data;
int i;
for (i = csum = 0; i < size; i++)
csum += bytes[i];
return (~csum) && 0xFF;
}
void mcu_irq(void)
{
printk(BIOS_DEBUG, "waiting for MCU msg...\n");
while (!(read32(&mvmap2315_bcm_gicd->ispendr2) &
MVMAP2315_MCU_IPC_IRQ))
;
}
void send_mcu_msg(void *msg, u32 size)
{
printk(BIOS_DEBUG, "sending msg to MCU...\n");
write32(&mvmap2315_sp_ipc->wdr0, (u32)msg);
setbits_le32(&mvmap2315_sp_ipc->isrw, MVMAP2315_IPC_IRQSET_MSGSENT);
}
void *receive_mcu_msg(void)
{
void *msg;
printk(BIOS_DEBUG, "receiving msg to MCU...\n");
write32(&mvmap2315_sp_ipc->dummy, 0xA5A5A5A5);
switch (read32(&mvmap2315_sp_ipc->iir)) {
case MSG_READY:
msg = (void *)(read32(&mvmap2315_sp_ipc->rdr0)
+ MVMAP2315_MCU_MSG_OFFSET);
setbits_le32(&mvmap2315_sp_ipc->icr,
MVMAP2315_IPC_IRQCLR_MSGREADY);
setbits_le32(&mvmap2315_sp_ipc->isrw, MVMAP2315_IPC_IRQACK);
break;
case MSG_RECEIVED:
msg = NULL;
setbits_le32(&mvmap2315_sp_ipc->icr,
MVMAP2315_IPC_IRQCLR_MSGRECEIVED);
break;
case MSG_READY_RECEIVED:
msg = (void *)(read32(&mvmap2315_sp_ipc->rdr0)
+ MVMAP2315_MCU_MSG_OFFSET);
setbits_le32(&mvmap2315_sp_ipc->icr,
MVMAP2315_IPC_IRQCLR_MSGREADY);
setbits_le32(&mvmap2315_sp_ipc->icr,
MVMAP2315_IPC_IRQCLR_MSGRECEIVED);
setbits_le32(&mvmap2315_sp_ipc->isrw, MVMAP2315_IPC_IRQACK);
break;
default:
msg = NULL;
write32(&mvmap2315_sp_ipc->icr, read32(&mvmap2315_sp_ipc->iir));
break;
}
return msg;
}
void sned_hash_msg(u8 subcmd)
{
printk(BIOS_DEBUG, "requesting MCU hash...\n");
mvmap2315_mcu_msg_buff->protocol_version = 0x3;
mvmap2315_mcu_msg_buff->cmd_id = 0x2A;
mvmap2315_mcu_msg_buff->reserved0 = 0x0;
mvmap2315_mcu_msg_buff->length = 76;
mvmap2315_mcu_msg_buff->csum = 0;
mvmap2315_mcu_msg_buff->hash_subcmd = subcmd;
mvmap2315_mcu_msg_buff->hash_type = 0;
mvmap2315_mcu_msg_buff->nonce_size = 0;
mvmap2315_mcu_msg_buff->reserved1 = 0;
mvmap2315_mcu_msg_buff->offset = 0;
mvmap2315_mcu_msg_buff->size = 32;
mvmap2315_mcu_msg_buff->csum = mvmap2315_calc_checksum(
(void *)mvmap2315_mcu_msg_buff,
sizeof(struct sp_hash_request_msg));
send_mcu_msg((void *)mvmap2315_mcu_msg_buff,
sizeof(struct sp_hash_request_msg));
}
void *receive_hash_msg_respond(void)
{
struct mcu_hash_msg *mvmap2315_hash_msg_response;
printk(BIOS_DEBUG, "waiting for MCU hash response msg...\n");
mcu_irq();
mvmap2315_hash_msg_response = receive_mcu_msg();
mcu_irq();
receive_mcu_msg();
return mvmap2315_hash_msg_response;
}
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