1 /* $NetBSD: obio.c,v 1.11 2003/07/15 00:25:05 lukem Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-4-Clause
5 *
6 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
7 * All rights reserved.
8 *
9 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed for the NetBSD Project by
22 * Wasabi Systems, Inc.
23 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
24 * or promote products derived from this software without specific prior
25 * written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40 /*
41 * On-board device autoconfiguration support for Cavium OCTEON 1 family of
42 * SoC devices.
43 */
44
45 #include <sys/cdefs.h>
46 __FBSDID("$FreeBSD$");
47
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/bus.h>
51 #include <sys/kernel.h>
52 #include <sys/module.h>
53 #include <sys/rman.h>
54 #include <sys/malloc.h>
55
56 #include <machine/bus.h>
57
58 #include <mips/cavium/octeon_pcmap_regs.h>
59 #include <mips/cavium/obiovar.h>
60
61 #include <contrib/octeon-sdk/cvmx.h>
62 #include <mips/cavium/octeon_irq.h>
63
64 extern struct bus_space octeon_uart_tag;
65
66 static void obio_identify(driver_t *, device_t);
67 static int obio_probe(device_t);
68 static int obio_attach(device_t);
69
70 static void
obio_identify(driver_t * drv,device_t parent)71 obio_identify(driver_t *drv, device_t parent)
72 {
73 BUS_ADD_CHILD(parent, 0, "obio", 0);
74 }
75
76 static int
obio_probe(device_t dev)77 obio_probe(device_t dev)
78 {
79 if (device_get_unit(dev) != 0)
80 return (ENXIO);
81 return (0);
82 }
83
84 static int
obio_attach(device_t dev)85 obio_attach(device_t dev)
86 {
87 struct obio_softc *sc = device_get_softc(dev);
88
89 sc->oba_st = mips_bus_space_generic;
90 /*
91 * XXX
92 * Here and elsewhere using RBR as a base address because it kind of
93 * is, but that feels pretty sloppy. Should consider adding a define
94 * that's more semantic, at least.
95 */
96 sc->oba_addr = CVMX_MIO_UARTX_RBR(0);
97 sc->oba_size = 0x10000;
98 sc->oba_rman.rm_type = RMAN_ARRAY;
99 sc->oba_rman.rm_descr = "OBIO I/O";
100 if (rman_init(&sc->oba_rman) != 0 ||
101 rman_manage_region(&sc->oba_rman,
102 sc->oba_addr, sc->oba_addr + sc->oba_size) != 0)
103 panic("obio_attach: failed to set up I/O rman");
104 sc->oba_irq_rman.rm_type = RMAN_ARRAY;
105 sc->oba_irq_rman.rm_descr = "OBIO IRQ";
106
107 /*
108 * This module is intended for UART purposes only and
109 * manages IRQs for UART0 and UART1.
110 */
111 if (rman_init(&sc->oba_irq_rman) != 0 ||
112 rman_manage_region(&sc->oba_irq_rman, OCTEON_IRQ_UART0, OCTEON_IRQ_UART1) != 0)
113 panic("obio_attach: failed to set up IRQ rman");
114
115 device_add_child(dev, "uart", 1); /* Setup Uart-1 first. */
116 device_add_child(dev, "uart", 0); /* Uart-0 next. So it is first in console list */
117 bus_generic_probe(dev);
118 bus_generic_attach(dev);
119 return (0);
120 }
121
122 static struct resource *
obio_alloc_resource(device_t bus,device_t child,int type,int * rid,rman_res_t start,rman_res_t end,rman_res_t count,u_int flags)123 obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
124 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
125 {
126 struct resource *rv;
127 struct rman *rm;
128 bus_space_tag_t bt = 0;
129 bus_space_handle_t bh = 0;
130 struct obio_softc *sc = device_get_softc(bus);
131
132 switch (type) {
133 case SYS_RES_IRQ:
134 switch (device_get_unit(child)) {
135 case 0:
136 start = end = OCTEON_IRQ_UART0;
137 break;
138 case 1:
139 start = end = OCTEON_IRQ_UART1;
140 break;
141 default:
142 return (NULL);
143 }
144 rm = &sc->oba_irq_rman;
145 break;
146 case SYS_RES_MEMORY:
147 return (NULL);
148 case SYS_RES_IOPORT:
149 rm = &sc->oba_rman;
150 bt = &octeon_uart_tag;
151 bh = CVMX_MIO_UARTX_RBR(device_get_unit(child));
152 start = bh;
153 break;
154 default:
155 return (NULL);
156 }
157
158 rv = rman_reserve_resource(rm, start, end, count, flags, child);
159 if (rv == NULL) {
160 return (NULL);
161 }
162 if (type == SYS_RES_IRQ) {
163 return (rv);
164 }
165 rman_set_rid(rv, *rid);
166 rman_set_bustag(rv, bt);
167 rman_set_bushandle(rv, bh);
168
169 if (0) {
170 if (bus_activate_resource(child, type, *rid, rv)) {
171 rman_release_resource(rv);
172 return (NULL);
173 }
174 }
175 return (rv);
176
177 }
178
179 static int
obio_activate_resource(device_t bus,device_t child,int type,int rid,struct resource * r)180 obio_activate_resource(device_t bus, device_t child, int type, int rid,
181 struct resource *r)
182 {
183 return (0);
184 }
185 static device_method_t obio_methods[] = {
186 /* Device methods */
187 DEVMETHOD(device_identify, obio_identify),
188 DEVMETHOD(device_probe, obio_probe),
189 DEVMETHOD(device_attach, obio_attach),
190
191 /* Bus methods */
192 DEVMETHOD(bus_alloc_resource, obio_alloc_resource),
193 DEVMETHOD(bus_activate_resource,obio_activate_resource),
194 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
195 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
196
197 DEVMETHOD(bus_add_child, bus_generic_add_child),
198
199 {0, 0},
200 };
201
202 static driver_t obio_driver = {
203 "obio",
204 obio_methods,
205 sizeof(struct obio_softc),
206 };
207 static devclass_t obio_devclass;
208
209 DRIVER_MODULE(obio, ciu, obio_driver, obio_devclass, 0, 0);
210