1 /* $NetBSD: zs_any.c,v 1.18 2008/04/28 20:23:37 martin Exp $ */
2
3 /*-
4 * Copyright (c) 1996 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Gordon W. Ross and Matthew Fredette.
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 * Zilog Z8530 Dual UART driver (machine-dependent part)
34 *
35 * Runs two serial lines per chip using slave drivers.
36 * Plain tty/async lines use the zs_async slave.
37 * Sun keyboard/mouse uses the zs_kbd/zs_ms slaves.
38 */
39
40 #include <sys/cdefs.h>
41 __KERNEL_RCSID(0, "$NetBSD: zs_any.c,v 1.18 2008/04/28 20:23:37 martin Exp $");
42
43 #include "opt_kgdb.h"
44
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/conf.h>
48 #include <sys/device.h>
49 #include <sys/file.h>
50 #include <sys/ioctl.h>
51 #include <sys/kernel.h>
52 #include <sys/proc.h>
53 #include <sys/tty.h>
54 #include <sys/time.h>
55 #include <sys/syslog.h>
56
57 #include <machine/autoconf.h>
58 #include <machine/bus.h>
59 #include <machine/z8530var.h>
60
61 #ifdef KGDB
62 #include <uvm/uvm_extern.h>
63
64 #include <machine/idprom.h>
65 #include <machine/pmap.h>
66 #include <sun2/dev/cons.h>
67 #endif
68
69 #include <sun2/sun2/machdep.h>
70 #include <dev/ic/z8530reg.h>
71 #include <dev/sun/kbd_reg.h>
72
73 /****************************************************************
74 * Autoconfig
75 ****************************************************************/
76
77 /* Definition of the driver for autoconfig. */
78 static int zs_any_match(device_t, cfdata_t, void *);
79 static void zs_any_attach(device_t, device_t, void *);
80
81 CFATTACH_DECL_NEW(zs_obio, sizeof(struct zsc_softc),
82 zs_any_match, zs_any_attach, NULL, NULL);
83
84 CFATTACH_DECL_NEW(zs_obmem, sizeof(struct zsc_softc),
85 zs_any_match, zs_any_attach, NULL, NULL);
86
87 CFATTACH_DECL_NEW(zs_mbmem, sizeof(struct zsc_softc),
88 zs_any_match, zs_any_attach, NULL, NULL);
89
90 /*
91 * Is the zs chip present?
92 */
93 static int
zs_any_match(device_t parent,cfdata_t cf,void * aux)94 zs_any_match(device_t parent, cfdata_t cf, void *aux)
95 {
96 struct mainbus_attach_args *ma = aux;
97 bus_space_handle_t bh;
98 int matched;
99
100 /* Make sure there is something there... */
101 if (bus_space_map(ma->ma_bustag, ma->ma_paddr, sizeof(struct zsdevice),
102 0, &bh))
103 return (0);
104 matched = (bus_space_peek_1(ma->ma_bustag, bh, 0, NULL) == 0);
105 bus_space_unmap(ma->ma_bustag, bh, sizeof(struct zsdevice));
106 if (!matched)
107 return (0);
108
109 /* Default interrupt priority (always splbio==2) */
110 if (ma->ma_pri == -1)
111 ma->ma_pri = ZSHARD_PRI;
112
113 return (1);
114 }
115
116 /*
117 * Attach a found zs.
118 */
119 static void
zs_any_attach(device_t parent,device_t self,void * aux)120 zs_any_attach(device_t parent, device_t self, void *aux)
121 {
122 struct zsc_softc *zsc = device_private(self);
123 struct mainbus_attach_args *ma = aux;
124 bus_space_handle_t bh;
125
126 zsc->zsc_dev = self;
127 zsc->zsc_bustag = ma->ma_bustag;
128 zsc->zsc_dmatag = ma->ma_dmatag;
129 /* XXX device_unit() abuse */
130 zsc->zsc_promunit = device_unit(self);
131 zsc->zsc_node = 0;
132
133 /* Map in the device. */
134 if (bus_space_map(ma->ma_bustag, ma->ma_paddr, sizeof(struct zsdevice),
135 BUS_SPACE_MAP_LINEAR, &bh)) {
136 aprint_normal("\n");
137 panic("%s: can't map", __func__);
138 }
139
140 /* This is where we break the bus_space(9) abstraction: */
141 zs_attach(zsc, (void *)bh, ma->ma_pri);
142 }
143
144 int
zs_console_flags(int promunit,int node,int channel)145 zs_console_flags(int promunit, int node, int channel)
146 {
147 int cookie, flags = 0;
148
149 /*
150 * Use `promunit' and `channel' to derive the PROM
151 * stdio handles that correspond to this device.
152 */
153 if (promunit == 0)
154 cookie = PROMDEV_TTYA + channel;
155 else if (promunit == 1 && channel == 0)
156 cookie = PROMDEV_KBD;
157 else
158 cookie = -1;
159
160 /*
161 * We have the console keyboard only if it's a Sun-2
162 * keyboard or better. (i.e., not a Sun-1 parallel kbd).
163 */
164 if (cookie == prom_stdin() &&
165 (cookie != PROMDEV_KBD || prom_kbdid() >= KB_SUN2))
166 flags |= ZS_HWFLAG_CONSOLE_INPUT;
167
168 /*
169 * Prevent the keyboard from matching the output device
170 * (note that PROMDEV_KBD == PROMDEV_SCREEN == 0!).
171 */
172 if (cookie != PROMDEV_KBD && cookie == prom_stdout())
173 flags |= ZS_HWFLAG_CONSOLE_OUTPUT;
174
175 return (flags);
176 }
177
178 #ifdef KGDB
179 /*
180 * Find a zs mapped by the PROM. Currently this only works to find
181 * zs0 on obio.
182 */
183 void *
zs_find_prom(int unit)184 zs_find_prom(int unit)
185 {
186 bus_addr_t zs0_phys;
187 vaddr_t va;
188
189 if (unit != 0)
190 return (NULL);
191
192 /*
193 * The physical address of zs0 is model-dependent.
194 */
195 zs0_phys = (cpu_machine_id == ID_SUN2_120 ? 0x002000 : 0x7f2000);
196 if (find_prom_map(zs0_phys, PMAP_OBIO, sizeof(struct zsdevice), &va))
197 return (NULL);
198
199 return (void *)va;
200 }
201 #endif /* KGDB */
202