1 /* $NetBSD: plum.c,v 1.20 2021/08/07 16:18:54 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1999 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by UCHIYAMA Yasushi.
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 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: plum.c,v 1.20 2021/08/07 16:18:54 thorpej Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/device.h>
38 #include <sys/kmem.h>
39
40 #include <machine/bus.h>
41 #include <machine/intr.h>
42
43 #include <hpcmips/tx/tx39var.h>
44 #include <hpcmips/tx/txcsbusvar.h>
45 #include <hpcmips/dev/plumvar.h>
46 #include <hpcmips/dev/plumreg.h>
47
48 int plum_match(device_t, cfdata_t, void *);
49 void plum_attach(device_t, device_t, void *);
50 int plum_print(void *, const char *);
51 int plum_search(device_t, cfdata_t, const int *, void *);
52
53 struct plum_softc {
54 plum_chipset_tag_t sc_pc;
55 bus_space_tag_t sc_csregt;
56 bus_space_tag_t sc_csiot;
57 bus_space_tag_t sc_csmemt;
58 int sc_irq;
59 int sc_pri;
60 };
61
62 CFATTACH_DECL_NEW(plum, sizeof(struct plum_softc),
63 plum_match, plum_attach, NULL, NULL);
64
65 plumreg_t plum_idcheck(bus_space_tag_t);
66
67 int
plum_match(device_t parent,cfdata_t cf,void * aux)68 plum_match(device_t parent, cfdata_t cf, void *aux)
69 {
70 struct cs_attach_args *ca = aux;
71
72 switch (plum_idcheck(ca->ca_csreg.cstag)) {
73 default:
74 return (0);
75 case PLUM2_1:
76 case PLUM2_2:
77 /* nothing */;
78 }
79
80 return (1);
81 }
82
83 void
plum_attach(device_t parent,device_t self,void * aux)84 plum_attach(device_t parent, device_t self, void *aux)
85 {
86 struct cs_attach_args *ca = aux;
87 struct plum_softc *sc = device_private(self);
88 plumreg_t reg;
89
90 sc->sc_csregt = ca->ca_csreg.cstag;
91 sc->sc_csiot = ca->ca_csio.cstag;
92 sc->sc_csmemt = ca->ca_csmem.cstag;
93 sc->sc_irq = ca->ca_irq1;
94
95 switch (reg = plum_idcheck(sc->sc_csregt)) {
96 default:
97 printf(": unknown revision %#x\n", reg);
98 return;
99 case PLUM2_1:
100 printf(": Plum2 #1\n");
101 break;
102 case PLUM2_2:
103 printf(": Plum2 #2\n");
104 break;
105 }
106 sc->sc_pc = kmem_zalloc(sizeof(struct plum_chipset_tag), KM_SLEEP);
107 sc->sc_pc->pc_tc = ca->ca_tc;
108
109 /* Attach Plum devices */
110 /*
111 * interrupt, power/clock module is used by other plum module.
112 * attach first.
113 */
114 sc->sc_pri = 2;
115 config_search(self, NULL,
116 CFARGS(.search = plum_search));
117
118 /*
119 * Other plum module.
120 */
121 sc->sc_pri = 1;
122 config_search(self, NULL,
123 CFARGS(.search = plum_search));
124 }
125
126 plumreg_t
plum_idcheck(bus_space_tag_t regt)127 plum_idcheck(bus_space_tag_t regt)
128 {
129 bus_space_handle_t regh;
130 plumreg_t reg;
131
132 if (bus_space_map(regt, PLUM_ID_REGBASE,
133 PLUM_ID_REGSIZE, 0, ®h)) {
134 printf("ID register map failed\n");
135 return (0);
136 }
137 reg = plum_conf_read(regt, regh, PLUM_ID_REG);
138 bus_space_unmap(regt, regh, PLUM_ID_REGSIZE);
139
140 return (reg);
141 }
142
143 int
plum_print(void * aux,const char * pnp)144 plum_print(void *aux, const char *pnp)
145 {
146
147 return (pnp ? QUIET : UNCONF);
148 }
149
150 int
plum_search(device_t parent,cfdata_t cf,const int * ldesc,void * aux)151 plum_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
152 {
153 struct plum_softc *sc = device_private(parent);
154 struct plum_attach_args pa;
155
156 pa.pa_pc = sc->sc_pc;
157 pa.pa_regt = sc->sc_csregt;
158 pa.pa_iot = sc->sc_csiot;
159 pa.pa_memt = sc->sc_csmemt;
160 pa.pa_irq = sc->sc_irq;
161
162 if (/*XXX*/config_probe(parent, cf, &pa) == sc->sc_pri) {
163 config_attach(parent, cf, &pa, plum_print, CFARGS_NONE);
164 }
165
166 return 0;
167 }
168
169 plumreg_t
plum_conf_read(bus_space_tag_t t,bus_space_handle_t h,int o)170 plum_conf_read(bus_space_tag_t t, bus_space_handle_t h, int o)
171 {
172 plumreg_t reg;
173
174 reg = bus_space_read_4(t, h, o);
175
176 return (reg);
177 }
178
179 void
plum_conf_write(bus_space_tag_t t,bus_space_handle_t h,int o,plumreg_t v)180 plum_conf_write(bus_space_tag_t t, bus_space_handle_t h, int o, plumreg_t v)
181 {
182
183 bus_space_write_4(t, h, o, v);
184 }
185
186 void
plum_conf_register_intr(plum_chipset_tag_t t,void * intrt)187 plum_conf_register_intr(plum_chipset_tag_t t, void *intrt)
188 {
189
190 if (t->pc_intrt) {
191 panic("duplicate intrt");
192 }
193
194 t->pc_intrt = intrt;
195 }
196
197 void
plum_conf_register_power(plum_chipset_tag_t t,void * powert)198 plum_conf_register_power(plum_chipset_tag_t t, void *powert)
199 {
200
201 if (t->pc_powert) {
202 panic("duplicate powert");
203 }
204
205 t->pc_powert = powert;
206 }
207