sa1111.c revision 1.22
1/* $NetBSD: sa1111.c,v 1.22 2008/04/28 20:23:14 martin 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 * TODO: 34 * - introduce bus abstraction to support SA-1101 35 */ 36 37#include <sys/cdefs.h> 38__KERNEL_RCSID(0, "$NetBSD: sa1111.c,v 1.22 2008/04/28 20:23:14 martin Exp $"); 39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/types.h> 43#include <sys/conf.h> 44#include <sys/device.h> 45#include <sys/kernel.h> 46#include <sys/malloc.h> 47#include <sys/uio.h> 48 49#include <machine/bus.h> 50#include <machine/intr.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 58#include "locators.h" 59 60static int sa1111_print(void *, const char *); 61 62static void sacc_intr_calculatemasks(struct sacc_softc *); 63static void sacc_intr_setpolarity(sacc_chipset_tag_t *, int , int); 64 65#ifdef INTR_DEBUG 66#define DPRINTF(arg) printf arg 67#else 68#define DPRINTF(arg) 69#endif 70 71int 72sacc_probe(struct device *parent, struct cfdata *match, void *aux) 73{ 74 struct sa11x0_attach_args *sa = aux; 75 bus_space_handle_t ioh; 76 uint32_t skid; 77 78 if (bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, &ioh)) 79 return 0; 80 81 skid = bus_space_read_4(sa->sa_iot, ioh, SACCSBI_SKID); 82 bus_space_unmap(sa->sa_iot, ioh, sa->sa_size); 83 84 if ((skid & 0xffffff00) != 0x690cc200) 85 return 0; 86 87 return 1; 88} 89 90 91int 92sa1111_search(struct device *parent, struct cfdata *cf, const int *ldesc, 93 void *aux) 94{ 95 struct sa1111_attach_args aa; 96 97 aa.sa_addr = cf->cf_loc[SACCCF_ADDR]; 98 aa.sa_size = cf->cf_loc[SACCCF_SIZE]; 99 aa.sa_intr = cf->cf_loc[SACCCF_INTR]; 100#if 0 101 aa.sa_membase = cf->cf_loc[SACCCF_MEMBASE]; 102 aa.sa_memsize = cf->cf_loc[SACCCF_MEMSIZE]; 103#endif 104 105 if (config_match(parent, cf, &aa) > 0) 106 config_attach(parent, cf, &aa, sa1111_print); 107 108 return 0; 109} 110 111static int 112sa1111_print(void *aux, const char *name) 113{ 114 115 return UNCONF; 116} 117 118 119void * 120sacc_intr_establish(sacc_chipset_tag_t *ic, int irq, int type, int level, 121 int (*ih_fun)(void *), void *ih_arg) 122{ 123 int s; 124 struct sacc_softc *sc = (struct sacc_softc *)ic; 125 struct sacc_intrhand **p, *ih; 126 127 /* no point in sleeping unless someone can free memory. */ 128 ih = malloc(sizeof *ih, M_DEVBUF, cold ? M_NOWAIT : M_WAITOK); 129 if (ih == NULL) 130 panic("sacc_intr_establish: can't malloc handler info"); 131 132 if (irq < 0 || irq > SACCIC_LEN || 133 !(type == IST_EDGE_RAISE || type == IST_EDGE_FALL)) 134 panic("sacc_intr_establish: bogus irq or type"); 135 136 if (sc->sc_intrhand[irq] == NULL) { 137 sacc_intr_setpolarity(ic, irq, type); 138 sc->sc_intrtype[irq] = type; 139 } else if (sc->sc_intrtype[irq] != type) 140 /* XXX we should be able to share raising and 141 * falling edge intrs */ 142 panic("sacc_intr_establish: type must be unique"); 143 144 /* install intr handler */ 145 /* map interrupt level to appropriate softinterrupt level */ 146 level = SOFTINT_SERIAL; 147 ih->ih_soft = softint_establish(level, (void (*)(void *)) ih_fun, 148 ih_arg); 149 ih->ih_irq = irq; 150 ih->ih_next = NULL; 151 152 s = splhigh(); 153 for (p = &sc->sc_intrhand[irq]; *p; p = &(*p)->ih_next) 154 continue; 155 156 *p = ih; 157 158 sacc_intr_calculatemasks(sc); 159 splx(s); 160 161 return ih; 162} 163 164void 165sacc_intr_disestablish(sacc_chipset_tag_t *ic, void *arg) 166{ 167 int irq, s; 168 struct sacc_softc *sc = (struct sacc_softc *)ic; 169 struct sacc_intrhand *ih, **p; 170 171 ih = (struct sacc_intrhand *)arg; 172 irq = ih->ih_irq; 173 174#ifdef DIAGNOSTIC 175 if (irq < 0 || irq > SACCIC_LEN) 176 panic("sacc_intr_disestablish: bogus irq"); 177#endif 178 179 s = splhigh(); 180 181 for (p = &sc->sc_intrhand[irq];; p = &(*p)->ih_next) { 182 if (*p == NULL) 183 panic("sacc_intr_disestablish: handler not registered"); 184 if (*p == ih) 185 break; 186 } 187 *p = (*p)->ih_next; 188 189 sacc_intr_calculatemasks(sc); 190 splx(s); 191 192 free(ih, M_DEVBUF); 193} 194 195static void 196sacc_intr_setpolarity(sacc_chipset_tag_t *ic, int irq, int type) 197{ 198 struct sacc_softc *sc = (struct sacc_softc *)ic; 199 int s; 200 uint32_t pol, mask; 201 int addr; 202 203 if (irq >= 32) { 204 addr = SACCIC_INTPOL1; 205 irq -= 32; 206 } else 207 addr = SACCIC_INTPOL0; 208 209 mask = (1 << irq); 210 211 s = splhigh(); 212 pol = bus_space_read_4(sc->sc_iot, sc->sc_ioh, addr); 213 if (type == IST_EDGE_RAISE) 214 pol &= ~mask; 215 else 216 pol |= mask; 217 bus_space_write_4(sc->sc_iot, sc->sc_ioh, addr, pol); 218 splx(s); 219} 220 221static void 222sacc_intr_calculatemasks(struct sacc_softc *sc) 223{ 224 int irq; 225 226 sc->sc_imask.lo = 0; 227 sc->sc_imask.hi = 0; 228 for (irq = 0; irq < 32; irq++) 229 if (sc->sc_intrhand[irq]) 230 sc->sc_imask.lo |= (1 << irq); 231 for (irq = 0; irq < SACCIC_LEN - 32; irq++) 232 if (sc->sc_intrhand[irq + 32]) 233 sc->sc_imask.hi |= (1 << irq); 234 235 236 /* XXX this should not be done here */ 237 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN0, 238 sc->sc_imask.lo); 239 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN1, 240 sc->sc_imask.hi); 241 DPRINTF(("sacc_intr_calculatemasks: %x %x\n", sc->sc_imask.lo, 242 sc->sc_imask.hi)); 243} 244