jazzio.c revision 1.17
1 /* $NetBSD: jazzio.c,v 1.17 2006/06/24 03:50:38 tsutsui Exp $ */ 2 /* $OpenBSD: picabus.c,v 1.11 1999/01/11 05:11:10 millert Exp $ */ 3 /* NetBSD: tc.c,v 1.2 1995/03/08 00:39:05 cgd Exp */ 4 5 /* 6 * Copyright (c) 1994, 1995 Carnegie-Mellon University. 7 * All rights reserved. 8 * 9 * Author: Chris G. Demetriou 10 * Author: Per Fogelstrom. (Mips R4x00) 11 * 12 * Permission to use, copy, modify and distribute this software and 13 * its documentation is hereby granted, provided that both the copyright 14 * notice and this permission notice appear in all copies of the 15 * software, derivative works or modified versions, and any portions 16 * thereof, and that both notices appear in supporting documentation. 17 * 18 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 19 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 20 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 21 * 22 * Carnegie Mellon requests users of this software to return to 23 * 24 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 25 * School of Computer Science 26 * Carnegie Mellon University 27 * Pittsburgh PA 15213-3890 28 * 29 * any improvements or extensions that they make and grant Carnegie the 30 * rights to redistribute these changes. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: jazzio.c,v 1.17 2006/06/24 03:50:38 tsutsui Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/device.h> 39 40 #include <machine/bus.h> 41 #include <machine/pio.h> 42 #include <machine/autoconf.h> 43 #include <machine/platform.h> 44 45 #include <arc/jazz/jazziovar.h> 46 #include <arc/jazz/pica.h> 47 #include <arc/jazz/jazzdmatlbreg.h> 48 #include <arc/jazz/jazzdmatlbvar.h> 49 #include <arc/jazz/dma.h> 50 #include <arc/jazz/pckbc_jazzioreg.h> 51 52 #include "ioconf.h" 53 54 void arc_sysreset(bus_addr_t, bus_size_t); 55 56 struct jazzio_softc { 57 struct device sc_dv; 58 struct abus sc_bus; 59 struct arc_bus_dma_tag sc_dmat; 60 struct pica_dev *sc_devs; 61 }; 62 63 /* Definition of the driver for autoconfig. */ 64 int jazziomatch(struct device *, struct cfdata *, void *); 65 void jazzioattach(struct device *, struct device *, void *); 66 int jazzioprint(void *, const char *); 67 68 CFATTACH_DECL(jazzio, sizeof(struct jazzio_softc), 69 jazziomatch, jazzioattach, NULL, NULL); 70 71 void jazzio_intr_establish(int, int (*)(void *), void *); 72 void jazzio_intr_disestablish(int); 73 uint32_t jazzio_intr(uint32_t, struct clockframe *); 74 int jazzio_no_handler(void *); 75 76 /* 77 * Interrupt dispatch table for jazz i/o bus. 78 */ 79 struct jazzio_intrhand { 80 intr_handler_t ih_func; /* Interrupt handler */ 81 void *ih_arg; /* Parameter to send to handler */ 82 struct evcnt ih_evcnt; /* interrupt counter */ 83 char ih_evname[32]; /* event counter name */ 84 }; 85 86 struct jazzio_intrhand jazzio_intrtab[16]; 87 88 89 struct jazzio_config *jazzio_conf = NULL; 90 struct pica_dev *jazzio_devconfig = NULL; 91 int jazzio_found = 0; 92 int jazzio_int_mask = 0; /* jazz i/o interrupt enable mask */ 93 94 struct arc_bus_space jazzio_bus; 95 96 int 97 jazziomatch(struct device *parent, struct cfdata *match, void *aux) 98 { 99 struct confargs *ca = aux; 100 101 /* Make sure that we're looking for a jazzio bus. */ 102 if (strcmp(ca->ca_name, jazzio_cd.cd_name) != 0) 103 return 0; 104 105 return 1; 106 } 107 108 void 109 jazzioattach(struct device *parent, struct device *self, void *aux) 110 { 111 struct jazzio_softc *sc = (struct jazzio_softc *)self; 112 struct jazzio_attach_args ja; 113 int i; 114 115 if (jazzio_conf == NULL) 116 panic("jazzio_conf isn't initialized"); 117 if (jazzio_devconfig == NULL) 118 panic("jazzio_devconfig isn't initialized"); 119 120 jazzio_found = 1; 121 122 printf("\n"); 123 124 /* keep our CPU device description handy */ 125 sc->sc_devs = jazzio_devconfig; 126 127 /* initialize interrupt handler table */ 128 for (i = 0; i < sizeof(jazzio_intrtab)/sizeof(jazzio_intrtab[0]); i++) { 129 jazzio_intrtab[i].ih_func = jazzio_no_handler; 130 jazzio_intrtab[i].ih_arg = NULL; 131 } 132 133 /* set up interrupt handlers */ 134 (*platform->set_intr)(MIPS_INT_MASK_1, jazzio_intr, ARC_INTPRI_JAZZ); 135 136 sc->sc_bus.ab_dv = (struct device *)sc; 137 138 /* Initialize jazzio DMA mapping register area and pool */ 139 jazz_dmatlb_init(&jazzio_bus, jazzio_conf->jc_dmatlbreg); 140 141 /* Create bus_dma_tag */ 142 jazz_bus_dma_tag_init(&sc->sc_dmat); 143 144 /* Try to configure each jazzio attached device */ 145 for (i = 0; sc->sc_devs[i].ps_ca.ca_name != NULL; i++) { 146 147 ja.ja_name = sc->sc_devs[i].ps_ca.ca_name; 148 ja.ja_bus = &sc->sc_bus; 149 ja.ja_bust = &jazzio_bus; 150 ja.ja_dmat = &sc->sc_dmat; 151 ja.ja_addr = (bus_addr_t)sc->sc_devs[i].ps_base; 152 ja.ja_intr = sc->sc_devs[i].ps_ca.ca_slot; 153 ja.ja_dma = 0; 154 155 /* Tell the autoconfig machinery we've found the hardware. */ 156 config_found(self, &ja, jazzioprint); 157 } 158 } 159 160 int 161 jazzioprint(void *aux, const char *pnp) 162 { 163 struct jazzio_attach_args *ja = aux; 164 165 if (pnp) 166 aprint_normal("%s at %s", ja->ja_name, pnp); 167 aprint_normal(" addr 0x%lx", ja->ja_addr); 168 if (ja->ja_intr != -1) 169 aprint_normal(" intr %d", ja->ja_intr); 170 return UNCONF; 171 } 172 173 void 174 jazzio_intr_establish(int intr, intr_handler_t handler, void *val) 175 { 176 struct jazzio_intrhand *jirp; 177 178 if (intr < 0 || 179 intr >= sizeof(jazzio_intrtab)/sizeof(jazzio_intrtab[0])) 180 panic("jazzio intr %d out of range", intr); 181 jirp = &jazzio_intrtab[intr]; 182 if (jirp->ih_func != jazzio_no_handler) 183 panic("jazzio intr %d already set to %p", intr, jirp->ih_func); 184 185 jazzio_int_mask |= 1 << intr; 186 jirp->ih_func = handler; 187 jirp->ih_arg = val; 188 snprintf(jirp->ih_evname, sizeof(jirp->ih_evname), "intr %d", intr); 189 evcnt_attach_dynamic(&jirp->ih_evcnt, EVCNT_TYPE_INTR, 190 NULL, "jazzio", jirp->ih_evname); 191 192 (*jazzio_conf->jc_set_iointr_mask)(jazzio_int_mask); 193 } 194 195 void 196 jazzio_intr_disestablish(int intr) 197 { 198 struct jazzio_intrhand *jirp; 199 200 jazzio_int_mask &= ~(1 << intr); 201 jirp = &jazzio_intrtab[intr]; 202 jirp->ih_func = jazzio_no_handler; 203 jirp->ih_arg = NULL; 204 evcnt_detach(&jirp->ih_evcnt); 205 206 (*jazzio_conf->jc_set_iointr_mask)(jazzio_int_mask); 207 } 208 209 int 210 jazzio_no_handler(void *arg) 211 { 212 213 panic("uncaught jazzio interrupt with arg %p", arg); 214 } 215 216 /* 217 * Handle jazz i/o interrupt. 218 */ 219 uint32_t 220 jazzio_intr(uint32_t mask, struct clockframe *cf) 221 { 222 unsigned int vector; 223 struct jazzio_intrhand *jirp; 224 225 while ((vector = inb(jazzio_conf->jc_iointr_status_reg)) != 0) { 226 jirp = &jazzio_intrtab[(vector >> 2) - 1]; 227 (*jirp->ih_func)(jirp->ih_arg); 228 jirp->ih_evcnt.ev_count++; 229 } 230 return ~MIPS_INT_MASK_1; 231 } 232 233 void 234 jazzio_reset(void) 235 { 236 237 arc_sysreset(PICA_SYS_KBD, JAZZIO_KBCMDP); 238 } 239
Indexes created Mon Sep 29 21:09:56 GMT 2025