1 /* 2 * Copyright (c) 2019, Intel Corporation. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <common/debug.h> 8 #include <lib/mmio.h> 9 #include <platform_def.h> 10 11 #include "watchdog.h" 12 13 14 /* Reset watchdog timer */ 15 void watchdog_sw_rst(void) 16 { 17 mmio_write_32(WDT_CRR, WDT_SW_RST); 18 } 19 20 /* Print component information */ 21 void watchdog_info(void) 22 { 23 INFO("Component Type : %x\r\n", mmio_read_32(WDT_COMP_VERSION)); 24 INFO("Component Version : %x\r\n", mmio_read_32(WDT_COMP_TYPE)); 25 } 26 27 /* Check watchdog current status */ 28 void watchdog_status(void) 29 { 30 if (mmio_read_32(WDT_CR) & 1) { 31 INFO("Watchdog Timer is currently enabled\n"); 32 INFO("Current Counter : 0x%x\r\n", mmio_read_32(WDT_CCVR)); 33 } else { 34 INFO("Watchdog Timer is currently disabled\n"); 35 } 36 } 37 38 /* Initialize & enable watchdog */ 39 void watchdog_init(int watchdog_clk) 40 { 41 uint8_t cycles_i = 0; 42 uint32_t wdt_cycles = WDT_MIN_CYCLES; 43 uint32_t top_init_cycles = WDT_PERIOD * watchdog_clk; 44 45 while ((cycles_i < 15) && (wdt_cycles < top_init_cycles)) { 46 wdt_cycles = (wdt_cycles << 1); 47 cycles_i++; 48 } 49 50 mmio_write_32(WDT_TORR, (cycles_i << 4) | cycles_i); 51 52 mmio_write_32(WDT_CR, WDT_CR_RMOD|WDT_CR_EN); 53 } 54