xref: /netbsd-src/sys/dev/mvme/pcctwo.c (revision c7fb772b85b2b5d4cfb282f868f454b4701534fd)
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