Luka Kovacic | 6ae1702 | 2019-12-04 21:46:37 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2020 Sartura Ltd. |
| 3 | * Author: Luka Kovacic <luka.kovacic@sartura.hr> |
| 4 | * |
| 5 | * SPDX-License-Identifier: BSD-3-Clause |
| 6 | * https://spdx.org/licenses |
| 7 | */ |
| 8 | |
| 9 | #include <armada_common.h> |
| 10 | #include <common/debug.h> |
| 11 | #include <drivers/delay_timer.h> |
| 12 | #include <drivers/ti/uart/uart_16550.h> |
| 13 | #include <drivers/console.h> |
| 14 | #include <plat_marvell.h> |
| 15 | |
| 16 | /***************************************************************************** |
| 17 | * Platform specific power off functions |
| 18 | * Power off PSU / Send command to power management MCU / ... |
| 19 | ***************************************************************************** |
| 20 | */ |
| 21 | |
| 22 | unsigned char add_xor_checksum(unsigned char *buf, unsigned char xor_len) |
| 23 | { |
| 24 | unsigned char xor_sum = 0; |
| 25 | unsigned int i; |
| 26 | |
| 27 | for (i = 0; i < xor_len; i++) |
| 28 | xor_sum ^= buf[i]; |
| 29 | |
| 30 | return xor_sum; |
| 31 | } |
| 32 | |
| 33 | int system_power_off(void) |
| 34 | { |
| 35 | static console_t console; |
| 36 | |
| 37 | /* WT61P803 MCU system_off_now command */ |
| 38 | unsigned char system_off_now[4] = { '@', 'C', '0' }; |
| 39 | int i, len; |
| 40 | |
| 41 | len = sizeof(system_off_now); |
| 42 | system_off_now[len - 1] = add_xor_checksum(system_off_now, len); |
| 43 | |
Pali Rohár | 168d81e | 2021-05-14 13:21:56 +0200 | [diff] [blame] | 44 | console_16550_register(PLAT_MARVELL_UART_BASE + 0x100, |
| 45 | PLAT_MARVELL_UART_CLK_IN_HZ, 115200, &console); |
Luka Kovacic | 6ae1702 | 2019-12-04 21:46:37 +0100 | [diff] [blame] | 46 | |
| 47 | /* Send system_off_now to console */ |
| 48 | for (i = 0; i < len; i++) { |
| 49 | console.putc(system_off_now[i], &console); |
| 50 | udelay(1000); |
| 51 | } |
| 52 | |
| 53 | console.flush(&console); |
| 54 | (void)console_unregister(&console); |
| 55 | |
| 56 | mdelay(100); |
| 57 | |
| 58 | return 0; |
| 59 | } |