1 /* $NetBSD: obio.c,v 1.11 2003/07/15 00:25:05 lukem Exp $ */
2
3 /*-
4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe 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 * On-board device autoconfiguration support for Cavium OCTEON 1 family of
40 * SoC devices.
41 */
42
43 #include <sys/cdefs.h>
44 __FBSDID("$FreeBSD$");
45
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/bus.h>
49 #include <sys/kernel.h>
50 #include <sys/module.h>
51 #include <sys/rman.h>
52 #include <sys/malloc.h>
53
54 #include <machine/bus.h>
55
56 #include <mips/cavium/octeon_pcmap_regs.h>
57 #include <mips/cavium/obiovar.h>
58
59 #include <contrib/octeon-sdk/cvmx.h>
60 #include <mips/cavium/octeon_irq.h>
61
62 extern struct bus_space octeon_uart_tag;
63
64 static void obio_identify(driver_t *, device_t);
65 static int obio_probe(device_t);
66 static int obio_attach(device_t);
67
68 static void
obio_identify(driver_t * drv,device_t parent)69 obio_identify(driver_t *drv, device_t parent)
70 {
71 BUS_ADD_CHILD(parent, 0, "obio", 0);
72 }
73
74 static int
obio_probe(device_t dev)75 obio_probe(device_t dev)
76 {
77 if (device_get_unit(dev) != 0)
78 return (ENXIO);
79 return (0);
80 }
81
82 static int
obio_attach(device_t dev)83 obio_attach(device_t dev)
84 {
85 struct obio_softc *sc = device_get_softc(dev);
86
87 sc->oba_st = mips_bus_space_generic;
88 /*
89 * XXX
90 * Here and elsewhere using RBR as a base address because it kind of
91 * is, but that feels pretty sloppy. Should consider adding a define
92 * that's more semantic, at least.
93 */
94 sc->oba_addr = CVMX_MIO_UARTX_RBR(0);
95 sc->oba_size = 0x10000;
96 sc->oba_rman.rm_type = RMAN_ARRAY;
97 sc->oba_rman.rm_descr = "OBIO I/O";
98 if (rman_init(&sc->oba_rman) != 0 ||
99 rman_manage_region(&sc->oba_rman,
100 sc->oba_addr, sc->oba_addr + sc->oba_size) != 0)
101 panic("obio_attach: failed to set up I/O rman");
102 sc->oba_irq_rman.rm_type = RMAN_ARRAY;
103 sc->oba_irq_rman.rm_descr = "OBIO IRQ";
104
105 /*
106 * This module is intended for UART purposes only and
107 * manages IRQs for UART0 and UART1.
108 */
109 if (rman_init(&sc->oba_irq_rman) != 0 ||
110 rman_manage_region(&sc->oba_irq_rman, OCTEON_IRQ_UART0, OCTEON_IRQ_UART1) != 0)
111 panic("obio_attach: failed to set up IRQ rman");
112
113 device_add_child(dev, "uart", 1); /* Setup Uart-1 first. */
114 device_add_child(dev, "uart", 0); /* Uart-0 next. So it is first in console list */
115 bus_generic_probe(dev);
116 bus_generic_attach(dev);
117 return (0);
118 }
119
120 static struct resource *
obio_alloc_resource(device_t bus,device_t child,int type,int * rid,u_long start,u_long end,u_long count,u_int flags)121 obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
122 u_long start, u_long end, u_long count, u_int flags)
123 {
124 struct resource *rv;
125 struct rman *rm;
126 bus_space_tag_t bt = 0;
127 bus_space_handle_t bh = 0;
128 struct obio_softc *sc = device_get_softc(bus);
129
130 switch (type) {
131 case SYS_RES_IRQ:
132 switch (device_get_unit(child)) {
133 case 0:
134 start = end = OCTEON_IRQ_UART0;
135 break;
136 case 1:
137 start = end = OCTEON_IRQ_UART1;
138 break;
139 default:
140 return (NULL);
141 }
142 rm = &sc->oba_irq_rman;
143 break;
144 case SYS_RES_MEMORY:
145 return (NULL);
146 case SYS_RES_IOPORT:
147 rm = &sc->oba_rman;
148 bt = &octeon_uart_tag;
149 bh = CVMX_MIO_UARTX_RBR(device_get_unit(child));
150 start = bh;
151 break;
152 default:
153 return (NULL);
154 }
155
156 rv = rman_reserve_resource(rm, start, end, count, flags, child);
157 if (rv == NULL) {
158 return (NULL);
159 }
160 if (type == SYS_RES_IRQ) {
161 return (rv);
162 }
163 rman_set_rid(rv, *rid);
164 rman_set_bustag(rv, bt);
165 rman_set_bushandle(rv, bh);
166
167 if (0) {
168 if (bus_activate_resource(child, type, *rid, rv)) {
169 rman_release_resource(rv);
170 return (NULL);
171 }
172 }
173 return (rv);
174
175 }
176
177 static int
obio_activate_resource(device_t bus,device_t child,int type,int rid,struct resource * r)178 obio_activate_resource(device_t bus, device_t child, int type, int rid,
179 struct resource *r)
180 {
181 return (0);
182 }
183 static device_method_t obio_methods[] = {
184 /* Device methods */
185 DEVMETHOD(device_identify, obio_identify),
186 DEVMETHOD(device_probe, obio_probe),
187 DEVMETHOD(device_attach, obio_attach),
188
189 /* Bus methods */
190 DEVMETHOD(bus_alloc_resource, obio_alloc_resource),
191 DEVMETHOD(bus_activate_resource,obio_activate_resource),
192 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
193 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
194
195 DEVMETHOD(bus_add_child, bus_generic_add_child),
196
197 {0, 0},
198 };
199
200 static driver_t obio_driver = {
201 "obio",
202 obio_methods,
203 sizeof(struct obio_softc),
204 };
205 static devclass_t obio_devclass;
206
207 DRIVER_MODULE(obio, ciu, obio_driver, obio_devclass, 0, 0);
208