1 /* $NetBSD: pic_discovery.c,v 1.8 2017/06/01 02:45:07 chs Exp $ */ 2 3 /* 4 * Copyright (c) 2002 Allegro Networks, Inc., Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project by 18 * Allegro Networks, Inc., and Wasabi Systems, Inc. 19 * 4. The name of Allegro Networks, Inc. may not be used to endorse 20 * or promote products derived from this software without specific prior 21 * written permission. 22 * 5. The name of Wasabi Systems, Inc. may not be used to endorse 23 * or promote products derived from this software without specific prior 24 * written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY ALLEGRO NETWORKS, INC. AND 27 * WASABI SYSTEMS, INC. ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 28 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 29 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 30 * IN NO EVENT SHALL EITHER ALLEGRO NETWORKS, INC. OR WASABI SYSTEMS, INC. 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: pic_discovery.c,v 1.8 2017/06/01 02:45:07 chs Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/bus.h> 45 #include <sys/kmem.h> 46 #include <sys/intr.h> 47 48 #include <powerpc/pic/picvar.h> 49 50 #include <dev/marvell/gtvar.h> 51 #include <dev/marvell/gtintrreg.h> 52 #include <dev/marvell/gtintrvar.h> 53 54 55 __CTASSERT(sizeof(imask_t) == sizeof(uint64_t)); 56 57 struct discovery_gpp_pic_ops; 58 59 struct discovery_pic_ops { 60 struct pic_ops pic; 61 union { 62 uint64_t mask64; 63 uint32_t mask32[2]; 64 } _mask; 65 #define enable_mask _mask.mask64 66 #define enable_mask_high _mask.mask32[1] 67 #define enable_mask_low _mask.mask32[0] 68 }; 69 struct discovery_gpp_pic_ops { 70 struct pic_ops pic; 71 72 int gpp_base; 73 }; 74 75 76 static void discovery_enable_irq(struct pic_ops *, int, int); 77 static void discovery_disable_irq(struct pic_ops *, int); 78 static int discovery_get_irq(struct pic_ops *, int); 79 static void discovery_ack_irq(struct pic_ops *, int); 80 81 static void discovery_gpp_enable_irq(struct pic_ops *, int, int); 82 static void discovery_gpp_disable_irq(struct pic_ops *, int); 83 static int discovery_gpp_get_irq(struct pic_ops *, int); 84 static void discovery_gpp_ack_irq(struct pic_ops *, int); 85 86 87 struct pic_ops * 88 setup_discovery_pic(void) 89 { 90 struct discovery_pic_ops *discovery; 91 struct pic_ops *pic; 92 93 discovery = kmem_alloc(sizeof(*discovery), KM_SLEEP); 94 95 pic = &discovery->pic; 96 pic->pic_numintrs = 64; 97 pic->pic_cookie = (void *)NULL; /* set later */ 98 pic->pic_enable_irq = discovery_enable_irq; 99 pic->pic_reenable_irq = discovery_enable_irq; 100 pic->pic_disable_irq = discovery_disable_irq; 101 pic->pic_get_irq = discovery_get_irq; 102 pic->pic_ack_irq = discovery_ack_irq; 103 pic->pic_establish_irq = dummy_pic_establish_intr; 104 pic->pic_finish_setup = NULL; 105 strcpy(pic->pic_name, "discovery"); 106 pic_add(pic); 107 108 discovery->enable_mask = 0; 109 110 return pic; 111 } 112 113 static void 114 discovery_enable_irq(struct pic_ops *pic, int irq, int type) 115 { 116 struct discovery_pic_ops *discovery = (struct discovery_pic_ops *)pic; 117 118 discovery->enable_mask |= (1 << irq); 119 discovery_enable_intr(pic->pic_cookie, irq); 120 } 121 122 static void 123 discovery_disable_irq(struct pic_ops *pic, int irq) 124 { 125 struct discovery_pic_ops *discovery = (struct discovery_pic_ops *)pic; 126 127 discovery->enable_mask &= ~(1 << irq); 128 discovery_disable_intr(pic->pic_cookie, irq); 129 } 130 131 static int 132 discovery_get_irq(struct pic_ops *pic, int mode) 133 { 134 struct discovery_pic_ops *discovery = (struct discovery_pic_ops *)pic; 135 uint32_t cause; 136 int irq, base, msk; 137 138 cause = discovery_mic_low(pic->pic_cookie) & discovery->enable_mask_low; 139 if (cause) 140 base = 0; 141 else { 142 cause = discovery_mic_high(pic->pic_cookie); 143 cause &= discovery->enable_mask_high; 144 if (!cause) 145 return 255; 146 base = 32; 147 } 148 for (irq = base, msk = 0x00000001; !(cause & msk); irq++, msk <<= 1); 149 150 return irq; 151 } 152 153 static void 154 discovery_ack_irq(struct pic_ops *pic, int irq) 155 { 156 157 /* nothing */ 158 } 159 160 161 struct pic_ops * 162 setup_discovery_gpp_pic(void *discovery, int gpp_base) 163 { 164 struct discovery_gpp_pic_ops *discovery_gpp; 165 struct pic_ops *pic; 166 167 discovery_gpp = kmem_alloc(sizeof(*discovery_gpp), KM_SLEEP); 168 169 pic = &discovery_gpp->pic; 170 pic->pic_numintrs = 32; 171 pic->pic_cookie = discovery; 172 pic->pic_enable_irq = discovery_gpp_enable_irq; 173 pic->pic_reenable_irq = discovery_gpp_enable_irq; 174 pic->pic_disable_irq = discovery_gpp_disable_irq; 175 pic->pic_get_irq = discovery_gpp_get_irq; 176 pic->pic_ack_irq = discovery_gpp_ack_irq; 177 pic->pic_establish_irq = dummy_pic_establish_intr; 178 pic->pic_finish_setup = NULL; 179 strcpy(pic->pic_name, "discovery_gpp"); 180 pic_add(pic); 181 182 discovery_gpp->gpp_base = gpp_base; 183 184 return pic; 185 } 186 187 static void 188 discovery_gpp_enable_irq(struct pic_ops *pic, int irq, int type) 189 { 190 struct discovery_gpp_pic_ops *discovery_gpp = 191 (struct discovery_gpp_pic_ops *)pic; 192 struct discovery_pic_ops *discovery = discovery_gpp->pic.pic_cookie; 193 194 discovery_gpp_enable_intr(discovery->pic.pic_cookie, 195 discovery_gpp->gpp_base + irq); 196 } 197 198 static void 199 discovery_gpp_disable_irq(struct pic_ops *pic, int irq) 200 { 201 struct discovery_gpp_pic_ops *discovery_gpp = 202 (struct discovery_gpp_pic_ops *)pic; 203 struct discovery_pic_ops *discovery = discovery_gpp->pic.pic_cookie; 204 205 discovery_gpp_disable_intr(discovery->pic.pic_cookie, 206 discovery_gpp->gpp_base + irq); 207 } 208 209 static int 210 discovery_gpp_get_irq(struct pic_ops *pic, int mode) 211 { 212 struct discovery_gpp_pic_ops *discovery_gpp = 213 (struct discovery_gpp_pic_ops *)pic; 214 struct discovery_pic_ops *discovery = discovery_gpp->pic.pic_cookie; 215 uint32_t cause, mask; 216 int irq, msk, base; 217 218 cause = discovery_gpp_cause(discovery->pic.pic_cookie); 219 mask = discovery_gpp_mask(discovery->pic.pic_cookie); 220 221 base = discovery_gpp->gpp_base; 222 cause &= (mask & (0xff << base)); 223 if (!cause) 224 return 255; 225 226 for (irq = base, msk = (1 << base); !(cause & msk); irq++, msk <<= 1); 227 228 return irq; 229 } 230 231 static void 232 discovery_gpp_ack_irq(struct pic_ops *pic, int irq) 233 { 234 struct discovery_gpp_pic_ops *discovery_gpp = 235 (struct discovery_gpp_pic_ops *)pic; 236 struct discovery_pic_ops *discovery = discovery_gpp->pic.pic_cookie; 237 238 discovery_gpp_clear_cause(discovery->pic.pic_cookie, 239 discovery_gpp->gpp_base + irq); 240 } 241
Indexes created Sat Sep 20 22:09:52 GMT 2025