1 /* $NetBSD: pbus.c,v 1.15 2021/08/07 16:18:52 thorpej Exp $ */
2
3 /*
4 * Copyright 2001 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 /*
39 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
40 *
41 * Redistribution and use in source and binary forms, with or without
42 * modification, are permitted provided that the following conditions
43 * are met:
44 * 1. Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * 2. Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in the
48 * documentation and/or other materials provided with the distribution.
49 * 3. All advertising materials mentioning features or use of this software
50 * must display the following acknowledgement:
51 * This product includes software developed by Christopher G. Demetriou
52 * for the NetBSD Project.
53 * 4. The name of the author may not be used to endorse or promote products
54 * derived from this software without specific prior written permission
55 *
56 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
57 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
58 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
59 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
60 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
61 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
62 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
63 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
64 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
65 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
66 */
67
68 #include <sys/cdefs.h>
69 __KERNEL_RCSID(0, "$NetBSD: pbus.c,v 1.15 2021/08/07 16:18:52 thorpej Exp $");
70
71 #include "locators.h"
72 #include "pckbc.h"
73
74 #include <sys/param.h>
75 #include <sys/systm.h>
76 #include <sys/device.h>
77
78 #include <sys/bus.h>
79 #include <machine/walnut.h>
80
81 #include <evbppc/walnut/dev/pbusvar.h>
82
83 #include <powerpc/ibm4xx/ibm405gp.h>
84 #include <powerpc/ibm4xx/dev/plbvar.h>
85
86 /*
87 * The external devices on the Walnut 405GP evaluation board.
88 */
89 const struct pbus_dev {
90 const char *name;
91 bus_addr_t addr;
92 int irq;
93 } pbus_devs [] = {
94 { "ds1743rtc", NVRAM_BASE, -1 },
95 { "pckbc", KEY_MOUSE_BASE, 25 }, /* XXX: really irq x..x+1 */
96 { NULL }
97 };
98
99 static int pbus_match(device_t, cfdata_t, void *);
100 static void pbus_attach(device_t, device_t, void *);
101 static int pbus_print(void *, const char *);
102
103 CFATTACH_DECL_NEW(pbus, 0,
104 pbus_match, pbus_attach, NULL, NULL);
105
106 static struct powerpc_bus_space pbus_tag = {
107 _BUS_SPACE_LITTLE_ENDIAN | _BUS_SPACE_MEM_TYPE,
108 0x00000000,
109 NVRAM_BASE,
110 NVRAM_BASE + 0x0300010 /* Cover from NVRAM_BASE -> FPGA_BASE */
111 };
112
113 /*
114 * Probe for the peripheral bus.
115 */
116 static int
pbus_match(device_t parent,cfdata_t cf,void * aux)117 pbus_match(device_t parent, cfdata_t cf, void *aux)
118 {
119 struct pbus_attach_args *pba = aux;
120
121 /* match only pbus devices */
122 if (strcmp(pba->pb_name, cf->cf_name) != 0)
123 return (0);
124
125 return (1);
126 }
127
128 /*
129 * Attach the peripheral bus.
130 */
131 static void
pbus_attach(device_t parent,device_t self,void * aux)132 pbus_attach(device_t parent, device_t self, void *aux)
133 {
134 struct plb_attach_args *paa = aux;
135 struct pbus_attach_args pba;
136 int i;
137 #if NPCKBC > 0
138 bus_space_handle_t ioh_fpga;
139 bus_space_tag_t iot_fpga = &pbus_tag;
140 uint8_t fpga_reg;
141 #endif
142
143 printf("\n");
144
145 if (bus_space_init(&pbus_tag, "pbus", NULL, 0))
146 panic("pbus_attach: can't init tag");
147
148 for (i = 0; pbus_devs[i].name != NULL; i++) {
149 pba.pb_name = pbus_devs[i].name;
150 pba.pb_addr = pbus_devs[i].addr;
151 pba.pb_irq = pbus_devs[i].irq;
152 pba.pb_bt = &pbus_tag;
153 pba.pb_dmat = paa->plb_dmat;
154
155 const int locs[PBUSCF_NLOCS] = {
156 [PBUSCF_ADDR] = pba.pb_addr,
157 [PBUSCF_IRQ] = pba.pb_irq
158 };
159
160 config_found(self, &pba, pbus_print,
161 CFARGS(.submatch = config_stdsubmatch,
162 .locators = locs));
163 }
164
165 #if NPCKBC > 0
166 /* Configure FPGA */
167 if (bus_space_map(iot_fpga, FPGA_BASE, FPGA_SIZE, 0, &ioh_fpga)) {
168 printf("pbus_attach: can't map FPGA\n");
169 /* XXX - disable keyboard probe? */
170 } else {
171 /* Use separate interrupts for keyboard and mouse */
172 fpga_reg = bus_space_read_1(iot_fpga, ioh_fpga, FPGA_BRDC);
173 fpga_reg |= FPGA_BRDC_INT;
174 bus_space_write_1(iot_fpga, ioh_fpga, FPGA_BRDC, fpga_reg);
175
176 /* Set interrupts to active high */
177 fpga_reg = bus_space_read_1(iot_fpga, ioh_fpga, FPGA_INT_POL);
178 fpga_reg |= (FPGA_IRQ_KYBD | FPGA_IRQ_MOUSE);
179 bus_space_write_1(iot_fpga, ioh_fpga, FPGA_INT_POL, fpga_reg);
180
181 /* Set interrupts to level triggered */
182 fpga_reg = bus_space_read_1(iot_fpga, ioh_fpga, FPGA_INT_TRIG);
183 fpga_reg |= (FPGA_IRQ_KYBD | FPGA_IRQ_MOUSE);
184 bus_space_write_1(iot_fpga, ioh_fpga, FPGA_INT_TRIG, fpga_reg);
185
186 /* Enable interrupts */
187 fpga_reg = bus_space_read_1(iot_fpga, ioh_fpga, FPGA_INT_ENABLE);
188 fpga_reg |= (FPGA_IRQ_KYBD | FPGA_IRQ_MOUSE);
189 bus_space_write_1(iot_fpga, ioh_fpga, FPGA_INT_ENABLE, fpga_reg);
190
191 bus_space_unmap(&iot_fpga, ioh_fpga, 2);
192 }
193 #endif
194
195 }
196
197 static int
pbus_print(void * aux,const char * pnp)198 pbus_print(void *aux, const char *pnp)
199 {
200 struct pbus_attach_args *pba = aux;
201
202 if (pnp)
203 printf("%s at %s", pba->pb_name, pnp);
204
205 if (pba->pb_addr != PBUSCF_ADDR_DEFAULT)
206 aprint_normal(" addr 0x%08lx", pba->pb_addr);
207 if (pba->pb_irq != PBUSCF_IRQ_DEFAULT)
208 aprint_normal(" irq %d", pba->pb_irq);
209
210 return (UNCONF);
211 }
212