| /* |
| * 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; |
| } |