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 */
53struct pcctwo_softc *sys_pcctwo;
54
55int pcctwoprint(void *, const char *);
56
57
58/* ARGSUSED */
59void
60pcctwo_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
110int
111pcctwoprint(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 */
130void
131pcctwointr_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
167void
168pcctwointr_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
189struct evcnt *
190pcctwointr_evcnt(int lev)
191{
192
193	return ((*sys_pcctwo->sc_isrevcnt)(sys_pcctwo->sc_isrcookie, lev));
194}
195