common.c revision 298068
1282985Szbb/*- 2282985Szbb * Copyright (c) 2013 Ruslan Bukin <br@bsdpad.com> 3282985Szbb * Copyright (c) 2015 Semihalf. 4282985Szbb * All rights reserved. 5282985Szbb * 6282985Szbb * Redistribution and use in source and binary forms, with or without 7282985Szbb * modification, are permitted provided that the following conditions 8282985Szbb * are met: 9282985Szbb * 1. Redistributions of source code must retain the above copyright 10282985Szbb * notice, this list of conditions and the following disclaimer. 11282985Szbb * 2. Redistributions in binary form must reproduce the above copyright 12282985Szbb * notice, this list of conditions and the following disclaimer in the 13282985Szbb * documentation and/or other materials provided with the distribution. 14282985Szbb * 15282985Szbb * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16282985Szbb * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17282985Szbb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18282985Szbb * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19282985Szbb * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20282985Szbb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21282985Szbb * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22282985Szbb * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23282985Szbb * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24282985Szbb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25282985Szbb * SUCH DAMAGE. 26282985Szbb * 27282985Szbb */ 28282985Szbb 29282985Szbb#include <sys/cdefs.h> 30282985Szbb__FBSDID("$FreeBSD: head/sys/arm/annapurna/alpine/common.c 298068 2016-04-15 16:05:41Z andrew $"); 31282985Szbb 32289547Sian#include "opt_platform.h" 33289547Sian 34282985Szbb#include <sys/param.h> 35282985Szbb#include <sys/systm.h> 36282985Szbb#include <sys/bus.h> 37282985Szbb#include <sys/kernel.h> 38282985Szbb 39282985Szbb#include <dev/fdt/fdt_common.h> 40282985Szbb#include <dev/ofw/openfirm.h> 41282985Szbb 42282985Szbb#include <machine/bus.h> 43282985Szbb#include <machine/fdt.h> 44282985Szbb#include <machine/intr.h> 45282985Szbb 46282985Szbb#define WDTLOAD 0x000 47282985Szbb#define LOAD_MIN 0x00000001 48282985Szbb#define LOAD_MAX 0xFFFFFFFF 49282985Szbb#define WDTVALUE 0x004 50282985Szbb#define WDTCONTROL 0x008 51282985Szbb/* control register masks */ 52282985Szbb#define INT_ENABLE (1 << 0) 53282985Szbb#define RESET_ENABLE (1 << 1) 54282985Szbb#define WDTLOCK 0xC00 55282985Szbb#define UNLOCK 0x1ACCE551 56282985Szbb#define LOCK 0x00000001 57282985Szbb 58282985Szbbextern bus_addr_t al_devmap_pa; 59282985Szbbstruct fdt_fixup_entry fdt_fixup_table[] = { 60282985Szbb { NULL, NULL } 61282985Szbb}; 62282985Szbb 63282985Szbbstatic int alpine_get_wdt_base(uint32_t *pbase, uint32_t *psize); 64282985Szbbstatic int alpine_pic_decode_fdt(uint32_t iparent, uint32_t *intr, 65282985Szbb int *interrupt, int *trig, int *pol); 66282985Szbb 67282985Szbbint alpine_get_devmap_base(bus_addr_t *pa, bus_addr_t *size); 68282985Szbb 69282985Szbbint alpine_get_devmap_base(bus_addr_t *pa, bus_addr_t *size) 70282985Szbb{ 71282985Szbb phandle_t node; 72282985Szbb 73282985Szbb if ((node = OF_finddevice("/")) == 0) 74282985Szbb return (ENXIO); 75282985Szbb 76282985Szbb if ((node = fdt_find_compatible(node, "simple-bus", 1)) == 0) 77282985Szbb return (ENXIO); 78282985Szbb 79282985Szbb return fdt_get_range(node, 0, pa, size); 80282985Szbb} 81282985Szbb 82282985Szbbstatic int 83282985Szbbalpine_get_wdt_base(uint32_t *pbase, uint32_t *psize) 84282985Szbb{ 85282985Szbb phandle_t node; 86282985Szbb u_long base = 0; 87282985Szbb u_long size = 0; 88282985Szbb 89282985Szbb if (pbase == NULL || psize == NULL) 90282985Szbb return (EINVAL); 91282985Szbb 92282985Szbb if ((node = OF_finddevice("/")) == -1) 93282985Szbb return (EFAULT); 94282985Szbb 95282985Szbb if ((node = fdt_find_compatible(node, "simple-bus", 1)) == 0) 96282985Szbb return (EFAULT); 97282985Szbb 98282985Szbb if ((node = 99282985Szbb fdt_find_compatible(node, "arm,sp805", 1)) == 0) 100282985Szbb return (EFAULT); 101282985Szbb 102282985Szbb if (fdt_regsize(node, &base, &size)) 103282985Szbb return (EFAULT); 104282985Szbb 105282985Szbb *pbase = base; 106282985Szbb *psize = size; 107282985Szbb 108282985Szbb return (0); 109282985Szbb} 110282985Szbb 111282985Szbbvoid 112282985Szbbcpu_reset(void) 113282985Szbb{ 114282985Szbb uint32_t wdbase, wdsize; 115282985Szbb bus_addr_t wdbaddr; 116282985Szbb int ret; 117282985Szbb 118282985Szbb ret = alpine_get_wdt_base(&wdbase, &wdsize); 119282985Szbb if (ret) { 120282985Szbb printf("Unable to get WDT base, do power down manually..."); 121282985Szbb goto infinite; 122282985Szbb } 123282985Szbb 124282985Szbb ret = bus_space_map(fdtbus_bs_tag, al_devmap_pa + wdbase, 125282985Szbb wdsize, 0, &wdbaddr); 126282985Szbb if (ret) { 127282985Szbb printf("Unable to map WDT base, do power down manually..."); 128282985Szbb goto infinite; 129282985Szbb } 130282985Szbb 131282985Szbb bus_space_write_4(fdtbus_bs_tag, wdbaddr, WDTLOCK, UNLOCK); 132282985Szbb bus_space_write_4(fdtbus_bs_tag, wdbaddr, WDTLOAD, LOAD_MIN); 133282985Szbb bus_space_write_4(fdtbus_bs_tag, wdbaddr, WDTCONTROL, INT_ENABLE | RESET_ENABLE); 134282985Szbb 135282985Szbbinfinite: 136282985Szbb while (1) {} 137282985Szbb} 138282985Szbb 139298068Sandrew#ifndef INTRNG 140282985Szbbstatic int 141282985Szbbalpine_pic_decode_fdt(uint32_t iparent, uint32_t *intr, int *interrupt, 142282985Szbb int *trig, int *pol) 143282985Szbb{ 144282985Szbb int rv = 0; 145282985Szbb 146282985Szbb rv = gic_decode_fdt(iparent, intr, interrupt, trig, pol); 147282985Szbb if (rv == 0) { 148282985Szbb /* This was recognized as our PIC and decoded. */ 149282985Szbb interrupt = FDT_MAP_IRQ(iparent, interrupt); 150282985Szbb 151282985Szbb /* Configure the interrupt if callback provided */ 152282985Szbb if (arm_config_irq) 153282985Szbb (*arm_config_irq)(*interrupt, *trig, *pol); 154282985Szbb } 155282985Szbb return (rv); 156282985Szbb} 157282985Szbb 158282985Szbbfdt_pic_decode_t fdt_pic_table[] = { 159282985Szbb &alpine_pic_decode_fdt, 160282985Szbb NULL 161282985Szbb}; 162295509Sandrew#endif 163