1 /* $NetBSD: isa_hades.c,v 1.2 2002/09/27 15:35:53 provos 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 Leo Weppelman. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/types.h> 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/device.h> 43 44 #include <dev/isa/isavar.h> 45 #include <dev/isa/isareg.h> 46 47 #include <m68k/asm_single.h> 48 49 #include <machine/iomap.h> 50 #include <machine/mfp.h> 51 52 void isa_bus_init(void); 53 54 void 55 isa_bus_init() 56 { 57 } 58 59 /* 60 * The interrupt stuff is rather ugly. On the Hades, all interrupt lines 61 * for a slot are wired together and connected to either IO3 (slot1) or 62 * IO7 (slot2). Since no info can be obtained about the slot position 63 * at isa_intr_establish() time, the following assumption is made: 64 * - irq <= 6 -> slot 1 65 * - irq > 6 -> slot 2 66 */ 67 68 #define SLOTNR(irq) ((irq <= 6) ? 0 : 1) 69 70 static isa_intr_info_t iinfo[2] = { { -1 }, { -1 } }; 71 72 static int iifun __P((int, int)); 73 74 static int 75 iifun(slot, sr) 76 int slot; 77 int sr; 78 { 79 isa_intr_info_t *iinfo_p; 80 int s; 81 82 iinfo_p = &iinfo[slot]; 83 84 /* 85 * Disable the interrupts 86 */ 87 if (slot == 0) { 88 single_inst_bclr_b(MFP->mf_imrb, IB_ISA1); 89 } 90 else { 91 single_inst_bclr_b(MFP->mf_imra, IA_ISA2); 92 } 93 94 if ((sr & PSL_IPL) >= (iinfo_p->ipl & PSL_IPL)) { 95 /* 96 * We're running at a too high priority now. 97 */ 98 add_sicallback((si_farg)iifun, (void*)slot, 0); 99 } 100 else { 101 s = splx(iinfo_p->ipl); 102 if (slot == 0) { 103 do { 104 MFP->mf_iprb = (u_int8_t)~IB_ISA1; 105 (void) (iinfo_p->ifunc)(iinfo_p->iarg); 106 } while (MFP->mf_iprb & IB_ISA1); 107 single_inst_bset_b(MFP->mf_imrb, IB_ISA1); 108 } 109 else { 110 do { 111 MFP->mf_ipra = (u_int8_t)~IA_ISA2; 112 (void) (iinfo_p->ifunc)(iinfo_p->iarg); 113 } while (MFP->mf_ipra & IA_ISA2); 114 single_inst_bset_b(MFP->mf_imra, IA_ISA2); 115 } 116 splx(s); 117 } 118 return 1; 119 } 120 121 122 /* 123 * XXXX 124 * XXXX Note that this function is not really working yet! The big problem is 125 * XXXX to only generate interrupts for the slot the card is in... 126 */ 127 int 128 isa_intr_alloc(ic, mask, type, irq) 129 isa_chipset_tag_t ic; 130 int mask; 131 int type; 132 int *irq; 133 { 134 isa_intr_info_t *iinfo_p; 135 int slot, i; 136 137 138 /* 139 * The Hades only supports edge triggered interrupts! 140 */ 141 if (type != IST_EDGE) 142 return 1; 143 144 #define MAXIRQ 10 /* XXX: Pure fiction */ 145 for (i = 0; i < MAXIRQ; i++) { 146 if (mask & (1<<i)) { 147 slot = SLOTNR(i); 148 iinfo_p = &iinfo[slot]; 149 150 if (iinfo_p->slot < 0) { 151 *irq = i; 152 printf("WARNING: isa_intr_alloc is not yet ready!\n" 153 " make sure the card is in slot %d!\n", 154 slot); 155 return 0; 156 } 157 } 158 } 159 return (1); 160 } 161 void * 162 isa_intr_establish(ic, irq, type, level, ih_fun, ih_arg) 163 isa_chipset_tag_t ic; 164 int irq, type, level; 165 int (*ih_fun) __P((void *)); 166 void *ih_arg; 167 { 168 isa_intr_info_t *iinfo_p; 169 struct intrhand *ihand; 170 int slot; 171 172 /* 173 * The Hades only supports edge triggered interrupts! 174 */ 175 if (type != IST_EDGE) 176 return NULL; 177 178 slot = SLOTNR(irq); 179 iinfo_p = &iinfo[slot]; 180 181 if (iinfo_p->slot >= 0) 182 panic("isa_intr_establish: interrupt was already established"); 183 184 ihand = intr_establish((slot == 0) ? 3 : 15, USER_VEC, 0, 185 (hw_ifun_t)iifun, (void *)slot); 186 if (ihand != NULL) { 187 iinfo_p->slot = slot; 188 iinfo_p->ipl = level; 189 iinfo_p->ifunc = ih_fun; 190 iinfo_p->iarg = ih_arg; 191 iinfo_p->ihand = ihand; 192 193 /* 194 * Enable (unmask) the interrupt 195 */ 196 if (slot == 0) { 197 single_inst_bset_b(MFP->mf_imrb, IB_ISA1); 198 single_inst_bset_b(MFP->mf_ierb, IB_ISA1); 199 } 200 else { 201 single_inst_bset_b(MFP->mf_imra, IA_ISA2); 202 single_inst_bset_b(MFP->mf_iera, IA_ISA2); 203 } 204 return(iinfo_p); 205 } 206 return NULL; 207 } 208 209 void 210 isa_intr_disestablish(ic, handler) 211 isa_chipset_tag_t ic; 212 void *handler; 213 { 214 isa_intr_info_t *iinfo_p = (isa_intr_info_t *)handler; 215 216 if (iinfo_p->slot < 0) 217 panic("isa_intr_disestablish: interrupt was not established"); 218 219 (void) intr_disestablish(iinfo_p->ihand); 220 iinfo_p->slot = -1; 221 } 222