1/*- 2 * Copyright (c) 2013 Ruslan Bukin <br@bsdpad.com> 3 * Copyright (c) 2015 Semihalf. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: stable/11/sys/arm/annapurna/alpine/common.c 314506 2017-03-01 19:55:04Z ian $"); 31 32#include "opt_platform.h" 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/bus.h> 37#include <sys/kernel.h> 38 39#include <dev/fdt/fdt_common.h> 40#include <dev/ofw/openfirm.h> 41 42#include <machine/bus.h> 43#include <machine/fdt.h> 44#include <machine/intr.h> 45 46#define WDTLOAD 0x000 47#define LOAD_MIN 0x00000001 48#define LOAD_MAX 0xFFFFFFFF 49#define WDTVALUE 0x004 50#define WDTCONTROL 0x008 51/* control register masks */ 52#define INT_ENABLE (1 << 0) 53#define RESET_ENABLE (1 << 1) 54#define WDTLOCK 0xC00 55#define UNLOCK 0x1ACCE551 56#define LOCK 0x00000001 57 58extern bus_addr_t al_devmap_pa; 59 60static int alpine_get_wdt_base(uint32_t *pbase, uint32_t *psize); 61static int alpine_pic_decode_fdt(uint32_t iparent, uint32_t *intr, 62 int *interrupt, int *trig, int *pol); 63 64int alpine_get_devmap_base(bus_addr_t *pa, bus_addr_t *size); 65 66int alpine_get_devmap_base(bus_addr_t *pa, bus_addr_t *size) 67{ 68 phandle_t node; 69 70 if ((node = OF_finddevice("/")) == 0) 71 return (ENXIO); 72 73 if ((node = fdt_find_compatible(node, "simple-bus", 1)) == 0) 74 return (ENXIO); 75 76 return fdt_get_range(node, 0, pa, size); 77} 78 79static int 80alpine_get_wdt_base(uint32_t *pbase, uint32_t *psize) 81{ 82 phandle_t node; 83 u_long base = 0; 84 u_long size = 0; 85 86 if (pbase == NULL || psize == NULL) 87 return (EINVAL); 88 89 if ((node = OF_finddevice("/")) == -1) 90 return (EFAULT); 91 92 if ((node = fdt_find_compatible(node, "simple-bus", 1)) == 0) 93 return (EFAULT); 94 95 if ((node = 96 fdt_find_compatible(node, "arm,sp805", 1)) == 0) 97 return (EFAULT); 98 99 if (fdt_regsize(node, &base, &size)) 100 return (EFAULT); 101 102 *pbase = base; 103 *psize = size; 104 105 return (0); 106} 107 108void 109cpu_reset(void) 110{ 111 uint32_t wdbase, wdsize; 112 bus_addr_t wdbaddr; 113 int ret; 114 115 ret = alpine_get_wdt_base(&wdbase, &wdsize); 116 if (ret) { 117 printf("Unable to get WDT base, do power down manually..."); 118 goto infinite; 119 } 120 121 ret = bus_space_map(fdtbus_bs_tag, al_devmap_pa + wdbase, 122 wdsize, 0, &wdbaddr); 123 if (ret) { 124 printf("Unable to map WDT base, do power down manually..."); 125 goto infinite; 126 } 127 128 bus_space_write_4(fdtbus_bs_tag, wdbaddr, WDTLOCK, UNLOCK); 129 bus_space_write_4(fdtbus_bs_tag, wdbaddr, WDTLOAD, LOAD_MIN); 130 bus_space_write_4(fdtbus_bs_tag, wdbaddr, WDTCONTROL, INT_ENABLE | RESET_ENABLE); 131 132infinite: 133 while (1) {} 134} 135 136#ifndef INTRNG 137static int 138alpine_pic_decode_fdt(uint32_t iparent, uint32_t *intr, int *interrupt, 139 int *trig, int *pol) 140{ 141 int rv = 0; 142 143 rv = gic_decode_fdt(iparent, intr, interrupt, trig, pol); 144 if (rv == 0) { 145 /* This was recognized as our PIC and decoded. */ 146 interrupt = FDT_MAP_IRQ(iparent, interrupt); 147 148 /* Configure the interrupt if callback provided */ 149 if (arm_config_irq) 150 (*arm_config_irq)(*interrupt, *trig, *pol); 151 } 152 return (rv); 153} 154 155fdt_pic_decode_t fdt_pic_table[] = { 156 &alpine_pic_decode_fdt, 157 NULL 158}; 159#endif 160