sacc_hpcarm.c revision 1.13
1/* $NetBSD: sacc_hpcarm.c,v 1.13 2021/04/24 23:36:37 thorpej Exp $ */ 2 3/*- 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by IWAMOTO Toshihiro. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32/* 33 * Platform dependent part for SA-11[01]1 companion chip on hpcarm. 34 */ 35 36#include <sys/cdefs.h> 37__KERNEL_RCSID(0, "$NetBSD: sacc_hpcarm.c,v 1.13 2021/04/24 23:36:37 thorpej Exp $"); 38 39#include <sys/param.h> 40#include <sys/systm.h> 41#include <sys/types.h> 42#include <sys/conf.h> 43#include <sys/device.h> 44#include <sys/kernel.h> 45#include <sys/malloc.h> 46#include <sys/uio.h> 47#include <sys/bus.h> 48 49#include <machine/platid.h> 50#include <machine/platid_mask.h> 51 52#include <arm/sa11x0/sa11x0_reg.h> 53#include <arm/sa11x0/sa11x0_var.h> 54#include <arm/sa11x0/sa11x0_gpioreg.h> 55#include <arm/sa11x0/sa1111_reg.h> 56#include <arm/sa11x0/sa1111_var.h> 57 58static void sacc_attach(device_t, device_t, void *); 59static int sacc_intr(void *); 60 61struct platid_data sacc_platid_table[] = { 62 { &platid_mask_MACH_HP_JORNADA_7XX, (void *)1 }, 63 { NULL, NULL } 64}; 65 66CFATTACH_DECL_NEW(sacc, sizeof(struct sacc_softc), 67 sacc_probe, sacc_attach, NULL, NULL); 68 69#ifdef INTR_DEBUG 70#define DPRINTF(arg) aprint_normal arg 71#else 72#define DPRINTF(arg) 73#endif 74 75static void 76sacc_attach(device_t parent, device_t self, void *aux) 77{ 78 int i, gpiopin; 79 uint32_t skid; 80 struct sacc_softc *sc = device_private(self); 81 struct sa11x0_softc *psc = device_private(parent); 82 struct sa11x0_attach_args *sa = aux; 83 struct platid_data *p; 84 85 aprint_normal("\n"); 86 87 sc->sc_dev = self; 88 sc->sc_iot = sa->sa_iot; 89 sc->sc_piot = psc->sc_iot; 90 sc->sc_gpioh = psc->sc_gpioh; 91 92 p = platid_search_data(&platid, sacc_platid_table); 93 if (p == NULL) 94 return; 95 96 gpiopin = (int)p->data; 97 sc->sc_gpiomask = 1 << gpiopin; 98 99 if (bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 100 &sc->sc_ioh)) { 101 aprint_normal_dev(self, "unable to map registers\n"); 102 return; 103 } 104 105 skid = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACCSBI_SKID); 106 107 aprint_normal_dev(self, "SA-1111 rev %d.%d\n", 108 (skid & 0xf0) >> 4, skid & 0xf); 109 110 for (i = 0; i < SACCIC_LEN; i++) 111 sc->sc_intrhand[i] = NULL; 112 113 /* initialize SA-1111 interrupt controller */ 114 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN0, 0); 115 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN1, 0); 116 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTTSTSEL, 0); 117 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 118 SACCIC_INTSTATCLR0, 0xffffffff); 119 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 120 SACCIC_INTSTATCLR1, 0xffffffff); 121 122 /* connect to SA-1110's GPIO intr */ 123 sa11x0_intr_establish(0, gpiopin, 1, IPL_SERIAL, sacc_intr, sc); 124 125 /* attach each devices */ 126 config_search(self, NULL, 127 CFARG_SEARCH, sa1111_search, 128 CFARG_EOL); 129} 130 131static int 132sacc_intr(void *arg) 133{ 134 int i; 135 uint32_t mask; 136 struct sacc_intrvec intstat; 137 struct sacc_softc *sc = arg; 138 struct sacc_intrhand *ih; 139 140 intstat.lo = 141 bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTSTATCLR0); 142 intstat.hi = 143 bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTSTATCLR1); 144 DPRINTF(("sacc_intr: %x %x\n", intstat.lo, intstat.hi)); 145 146 /* clear SA-1110's GPIO intr status */ 147 bus_space_write_4(sc->sc_piot, sc->sc_gpioh, 148 SAGPIO_EDR, sc->sc_gpiomask); 149 150 for (i = 0, mask = 1; i < 32; i++, mask <<= 1) 151 if (intstat.lo & mask) { 152 /* 153 * Clear intr status before calling intr handlers. 154 * This cause stray interrupts, but clearing 155 * after calling intr handlers cause intr lossage. 156 */ 157 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 158 SACCIC_INTSTATCLR0, 1 << i); 159 160 for (ih = sc->sc_intrhand[i]; ih; ih = ih->ih_next) 161 softint_schedule(ih->ih_soft); 162 } 163 for (i = 0, mask = 1; i < SACCIC_LEN - 32; i++, mask <<= 1) 164 if (intstat.hi & mask) { 165 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 166 SACCIC_INTSTATCLR1, 1 << i); 167 for (ih = sc->sc_intrhand[i + 32]; ih; ih = ih->ih_next) 168 softint_schedule(ih->ih_soft); 169 } 170 return 1; 171} 172