jazzio.c revision 1.11
1 /* $NetBSD: jazzio.c,v 1.11 2003/07/15 00:04:49 lukem 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 1.11 2003/07/15 00:04:49 lukem 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 void arc_sysreset __P((bus_addr_t, bus_size_t)); 53 54 struct jazzio_softc { 55 struct device sc_dv; 56 struct abus sc_bus; 57 struct arc_bus_dma_tag sc_dmat; 58 struct pica_dev *sc_devs; 59 }; 60 61 /* Definition of the driver for autoconfig. */ 62 int jazziomatch(struct device *, struct cfdata *, void *); 63 void jazzioattach(struct device *, struct device *, void *); 64 int jazzioprint(void *, const char *); 65 66 CFATTACH_DECL(jazzio, sizeof(struct jazzio_softc), 67 jazziomatch, jazzioattach, NULL, NULL); 68 extern struct cfdriver jazzio_cd; 69 70 void jazzio_intr_establish(int, int (*)(void *), void *); 71 void jazzio_intr_disestablish(int); 72 int jazzio_intr(unsigned, struct clockframe *); 73 int jazzio_no_handler __P((void *)); 74 75 /* 76 * Interrupt dispatch table for jazz i/o bus. 77 */ 78 struct jazzio_intr_registry { 79 intr_handler_t int_hand; /* Interrupt handler */ 80 void *param; /* Parameter to send to handler */ 81 }; 82 83 struct jazzio_intr_registry jazzio_intrtab[] = { 84 { jazzio_no_handler, (void *)NULL, }, /* 0 */ 85 { jazzio_no_handler, (void *)NULL, }, /* 1 */ 86 { jazzio_no_handler, (void *)NULL, }, /* 2 */ 87 { jazzio_no_handler, (void *)NULL, }, /* 3 */ 88 { jazzio_no_handler, (void *)NULL, }, /* 4 */ 89 { jazzio_no_handler, (void *)NULL, }, /* 5 */ 90 { jazzio_no_handler, (void *)NULL, }, /* 6 */ 91 { jazzio_no_handler, (void *)NULL, }, /* 7 */ 92 { jazzio_no_handler, (void *)NULL, }, /* 8 */ 93 { jazzio_no_handler, (void *)NULL, }, /* 9 */ 94 { jazzio_no_handler, (void *)NULL, }, /* 10 */ 95 { jazzio_no_handler, (void *)NULL, }, /* 11 */ 96 { jazzio_no_handler, (void *)NULL, }, /* 12 */ 97 { jazzio_no_handler, (void *)NULL, }, /* 13 */ 98 { jazzio_no_handler, (void *)NULL, }, /* 14 */ 99 { jazzio_no_handler, (void *)NULL, }, /* 15 */ 100 }; 101 102 103 struct jazzio_config *jazzio_conf = NULL; 104 struct pica_dev *jazzio_devconfig = NULL; 105 int jazzio_found = 0; 106 int jazzio_int_mask = 0; /* jazz i/o interrupt enable mask */ 107 108 struct arc_bus_space jazzio_bus; 109 110 int 111 jazziomatch(parent, match, aux) 112 struct device *parent; 113 struct cfdata *match; 114 void *aux; 115 { 116 struct confargs *ca = aux; 117 118 /* Make sure that we're looking for a jazzio bus. */ 119 if (strcmp(ca->ca_name, jazzio_cd.cd_name) != 0) 120 return (0); 121 122 return (1); 123 } 124 125 void 126 jazzioattach(parent, self, aux) 127 struct device *parent; 128 struct device *self; 129 void *aux; 130 { 131 struct jazzio_softc *sc = (struct jazzio_softc *)self; 132 struct jazzio_attach_args ja; 133 int i; 134 135 if (jazzio_conf == NULL) 136 panic("jazzio_conf isn't initialized"); 137 if (jazzio_devconfig == NULL) 138 panic("jazzio_devconfig isn't initialized"); 139 140 jazzio_found = 1; 141 142 printf("\n"); 143 144 /* keep our CPU device description handy */ 145 sc->sc_devs = jazzio_devconfig; 146 147 /* set up interrupt handlers */ 148 (*platform->set_intr)(MIPS_INT_MASK_1, jazzio_intr, 2); 149 150 sc->sc_bus.ab_dv = (struct device *)sc; 151 152 /* Initialize jazzio DMA mapping register area and pool */ 153 jazz_dmatlb_init(&jazzio_bus, jazzio_conf->jc_dmatlbreg); 154 155 /* Create bus_dma_tag */ 156 jazz_bus_dma_tag_init(&sc->sc_dmat); 157 158 /* Try to configure each jazzio attached device */ 159 for (i = 0; sc->sc_devs[i].ps_ca.ca_name != NULL; i++) { 160 161 ja.ja_name = sc->sc_devs[i].ps_ca.ca_name; 162 ja.ja_bus = &sc->sc_bus; 163 ja.ja_bust = &jazzio_bus; 164 ja.ja_dmat = &sc->sc_dmat; 165 ja.ja_addr = (bus_addr_t)sc->sc_devs[i].ps_base; 166 ja.ja_intr = sc->sc_devs[i].ps_ca.ca_slot; 167 ja.ja_dma = 0; 168 169 /* Tell the autoconfig machinery we've found the hardware. */ 170 config_found(self, &ja, jazzioprint); 171 } 172 } 173 174 int 175 jazzioprint(aux, pnp) 176 void *aux; 177 const char *pnp; 178 { 179 struct jazzio_attach_args *ja = aux; 180 181 if (pnp) 182 aprint_normal("%s at %s", ja->ja_name, pnp); 183 aprint_normal(" addr 0x%lx", ja->ja_addr); 184 if (ja->ja_intr != -1) 185 aprint_normal(" intr %d", ja->ja_intr); 186 return (UNCONF); 187 } 188 189 void 190 jazzio_intr_establish(intr, handler, val) 191 int intr; 192 intr_handler_t handler; 193 void *val; 194 { 195 if (intr < 0 || 196 intr >= sizeof(jazzio_intrtab)/sizeof(jazzio_intrtab[0])) { 197 panic("jazzio intr %d out of range", intr); 198 } else if (jazzio_intrtab[intr].int_hand != jazzio_no_handler) { 199 panic("jazzio intr %d already set to %p", intr, 200 jazzio_intrtab[intr].int_hand); 201 } else { 202 jazzio_int_mask |= 1 << intr; 203 jazzio_intrtab[intr].int_hand = handler; 204 jazzio_intrtab[intr].param = val; 205 } 206 207 (*jazzio_conf->jc_set_iointr_mask)(jazzio_int_mask); 208 } 209 210 void 211 jazzio_intr_disestablish(intr) 212 int intr; 213 { 214 jazzio_int_mask &= ~(1 << intr); 215 jazzio_intrtab[intr].int_hand = jazzio_no_handler; 216 jazzio_intrtab[intr].param = (void *)NULL; 217 218 (*jazzio_conf->jc_set_iointr_mask)(jazzio_int_mask); 219 } 220 221 int 222 jazzio_no_handler(arg) 223 void *arg; 224 { 225 panic("uncaught jazzio interrupt with arg %p", arg); 226 } 227 228 /* 229 * Handle jazz i/o interrupt. 230 */ 231 int 232 jazzio_intr(mask, cf) 233 unsigned mask; 234 struct clockframe *cf; 235 { 236 unsigned int vector; 237 struct jazzio_intr_registry *jirp; 238 239 while ((vector = inb(jazzio_conf->jc_iointr_status_reg)) != 0) { 240 jirp = &jazzio_intrtab[(vector >> 2) - 1]; 241 (*jirp->int_hand)(jirp->param); 242 } 243 return (~0); /* Dont reenable */ 244 } 245 246 void 247 jazzio_reset() 248 { 249 arc_sysreset(PICA_SYS_KBD, JAZZIO_KBCMDP); 250 } 251
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