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 *
setup_discovery_pic(void)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
discovery_enable_irq(struct pic_ops * pic,int irq,int type)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
discovery_disable_irq(struct pic_ops * pic,int irq)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
discovery_get_irq(struct pic_ops * pic,int mode)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
discovery_ack_irq(struct pic_ops * pic,int irq)154 discovery_ack_irq(struct pic_ops *pic, int irq)
155 {
156
157 /* nothing */
158 }
159
160
161 struct pic_ops *
setup_discovery_gpp_pic(void * discovery,int gpp_base)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
discovery_gpp_enable_irq(struct pic_ops * pic,int irq,int type)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
discovery_gpp_disable_irq(struct pic_ops * pic,int irq)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
discovery_gpp_get_irq(struct pic_ops * pic,int mode)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
discovery_gpp_ack_irq(struct pic_ops * pic,int irq)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