| /* |
| * Copyright (C) 2020 Sartura Ltd. |
| * Author: Luka Kovacic <luka.kovacic@sartura.hr> |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| * https://spdx.org/licenses |
| */ |
| |
| #include <armada_common.h> |
| #include <common/debug.h> |
| #include <drivers/delay_timer.h> |
| #include <drivers/ti/uart/uart_16550.h> |
| #include <drivers/console.h> |
| #include <plat_marvell.h> |
| |
| /***************************************************************************** |
| * Platform specific power off functions |
| * Power off PSU / Send command to power management MCU / ... |
| ***************************************************************************** |
| */ |
| |
| unsigned char add_xor_checksum(unsigned char *buf, unsigned char xor_len) |
| { |
| unsigned char xor_sum = 0; |
| unsigned int i; |
| |
| for (i = 0; i < xor_len; i++) |
| xor_sum ^= buf[i]; |
| |
| return xor_sum; |
| } |
| |
| int system_power_off(void) |
| { |
| static console_t console; |
| |
| /* WT61P803 MCU system_off_now command */ |
| unsigned char system_off_now[4] = { '@', 'C', '0' }; |
| int i, len; |
| |
| len = sizeof(system_off_now); |
| system_off_now[len - 1] = add_xor_checksum(system_off_now, len); |
| |
| console_16550_register(PLAT_MARVELL_UART_BASE + 0x100, |
| PLAT_MARVELL_UART_CLK_IN_HZ, 115200, &console); |
| |
| /* Send system_off_now to console */ |
| for (i = 0; i < len; i++) { |
| console.putc(system_off_now[i], &console); |
| udelay(1000); |
| } |
| |
| console.flush(&console); |
| (void)console_unregister(&console); |
| |
| mdelay(100); |
| |
| return 0; |
| } |