1 /* $NetBSD: pcctwo.c,v 1.13 2021/08/07 16:19:13 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1999, 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Steve C. Woodford.
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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * PCCchip2 and MCchip Driver
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: pcctwo.c,v 1.13 2021/08/07 16:19:13 thorpej Exp $");
38
39 #include <sys/param.h>
40 #include <sys/kernel.h>
41 #include <sys/systm.h>
42 #include <sys/device.h>
43
44 #include <sys/cpu.h>
45 #include <sys/bus.h>
46
47 #include <dev/mvme/pcctworeg.h>
48 #include <dev/mvme/pcctwovar.h>
49
50 /*
51 * Global Pointer to the PCCChip2/MCchip soft state, and chip ID
52 */
53 struct pcctwo_softc *sys_pcctwo;
54
55 int pcctwoprint(void *, const char *);
56
57
58 /* ARGSUSED */
59 void
pcctwo_init(struct pcctwo_softc * sc,const struct pcctwo_device * pd,int devoff)60 pcctwo_init(struct pcctwo_softc *sc, const struct pcctwo_device *pd, int devoff)
61 {
62 struct pcctwo_attach_args npa;
63 u_int8_t cid;
64
65 /*
66 * Fix up the vector base for PCCChip2 Interrupts
67 */
68 pcc2_reg_write(sc, PCC2REG_VECTOR_BASE, sc->sc_vecbase);
69
70 /*
71 * Enable PCCChip2 Interrupts
72 */
73 pcc2_reg_write(sc, PCC2REG_GENERAL_CONTROL,
74 pcc2_reg_read(sc, PCC2REG_GENERAL_CONTROL) | PCCTWO_GEN_CTRL_MIEN);
75
76 /* What are we? */
77 cid = pcc2_reg_read(sc, PCC2REG_CHIP_ID);
78
79 /*
80 * Announce ourselves to the world in general
81 */
82 if (cid == PCCTWO_CHIP_ID_PCC2)
83 printf(": Peripheral Channel Controller (PCCchip2), Rev %d\n",
84 pcc2_reg_read(sc, PCC2REG_CHIP_REVISION));
85 else
86 if (cid == PCCTWO_CHIP_ID_MCCHIP)
87 printf(": Memory Controller ASIC (MCchip), Rev %d\n",
88 pcc2_reg_read(sc, PCC2REG_CHIP_REVISION));
89
90 /*
91 * Attach configured children.
92 */
93 npa._pa_base = devoff;
94 while (pd->pcc_name != NULL) {
95 /*
96 * Note that IPL is filled in by match function.
97 */
98 npa.pa_name = pd->pcc_name;
99 npa.pa_ipl = -1;
100 npa.pa_dmat = sc->sc_dmat;
101 npa.pa_bust = sc->sc_bust;
102 npa.pa_offset = pd->pcc_offset + devoff;
103 pd++;
104
105 /* Attach the device if configured. */
106 (void) config_found(sc->sc_dev, &npa, pcctwoprint, CFARGS_NONE);
107 }
108 }
109
110 int
pcctwoprint(void * aux,const char * cp)111 pcctwoprint(void *aux, const char *cp)
112 {
113 struct pcctwo_attach_args *pa;
114
115 pa = aux;
116
117 if (cp)
118 aprint_normal("%s at %s", pa->pa_name, cp);
119
120 aprint_normal(" offset 0x%lx", pa->pa_offset - pa->_pa_base);
121 if (pa->pa_ipl != -1)
122 aprint_normal(" ipl %d", pa->pa_ipl);
123
124 return (UNCONF);
125 }
126
127 /*
128 * pcctwointr_establish: Establish PCCChip2 Interrupt
129 */
130 void
pcctwointr_establish(int vec,int (* hand)(void *),int lvl,void * arg,struct evcnt * evcnt)131 pcctwointr_establish(
132 int vec,
133 int (*hand)(void *),
134 int lvl,
135 void *arg,
136 struct evcnt *evcnt)
137 {
138 int vec2icsr;
139
140 #ifdef DEBUG
141 if (vec < 0 || vec >= PCCTWOV_MAX) {
142 printf("pcctwo: illegal vector offset: 0x%x\n", vec);
143 panic("pcctwointr_establish");
144 }
145 if (lvl < 1 || lvl > 7) {
146 printf("pcctwo: illegal interrupt level: %d\n", lvl);
147 panic("pcctwointr_establish");
148 }
149 if (sys_pcctwo->sc_vec2icsr[vec] == -1) {
150 printf("pcctwo: unsupported vector: %d\n", vec);
151 panic("pcctwointr_establish");
152 }
153 #endif
154
155 vec2icsr = sys_pcctwo->sc_vec2icsr[vec];
156 pcc2_reg_write(sys_pcctwo, VEC2ICSR_REG(vec2icsr), 0);
157
158 /* Hook the interrupt */
159 (*sys_pcctwo->sc_isrlink)(sys_pcctwo->sc_isrcookie, hand, arg,
160 lvl, vec + sys_pcctwo->sc_vecbase, evcnt);
161
162 /* Enable it in hardware */
163 pcc2_reg_write(sys_pcctwo, VEC2ICSR_REG(vec2icsr),
164 VEC2ICSR_INIT(vec2icsr) | lvl);
165 }
166
167 void
pcctwointr_disestablish(int vec)168 pcctwointr_disestablish(int vec)
169 {
170
171 #ifdef DEBUG
172 if (vec < 0 || vec >= PCCTWOV_MAX) {
173 printf("pcctwo: illegal vector offset: 0x%x\n", vec);
174 panic("pcctwointr_disestablish");
175 }
176 if (sys_pcctwo->sc_vec2icsr[vec] == -1) {
177 printf("pcctwo: unsupported vector: %d\n", vec);
178 panic("pcctwointr_establish");
179 }
180 #endif
181
182 /* Disable it in hardware */
183 pcc2_reg_write(sys_pcctwo, sys_pcctwo->sc_vec2icsr[vec], 0);
184
185 (*sys_pcctwo->sc_isrunlink)(sys_pcctwo->sc_isrcookie,
186 vec + sys_pcctwo->sc_vecbase);
187 }
188
189 struct evcnt *
pcctwointr_evcnt(int lev)190 pcctwointr_evcnt(int lev)
191 {
192
193 return ((*sys_pcctwo->sc_isrevcnt)(sys_pcctwo->sc_isrcookie, lev));
194 }
195