zs_any.c revision 1.8
1 /* $NetBSD: zs_any.c,v 1.8 2002/10/01 05:39:44 thorpej 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Zilog Z8530 Dual UART driver (machine-dependent part) 41 * 42 * Runs two serial lines per chip using slave drivers. 43 * Plain tty/async lines use the zs_async slave. 44 * Sun keyboard/mouse uses the zs_kbd/zs_ms slaves. 45 */ 46 47 #include "opt_kgdb.h" 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/conf.h> 52 #include <sys/device.h> 53 #include <sys/file.h> 54 #include <sys/ioctl.h> 55 #include <sys/kernel.h> 56 #include <sys/proc.h> 57 #include <sys/tty.h> 58 #include <sys/time.h> 59 #include <sys/syslog.h> 60 61 #include <machine/autoconf.h> 62 #include <machine/bus.h> 63 #include <machine/z8530var.h> 64 65 #ifdef KGDB 66 #include <uvm/uvm_extern.h> 67 68 #include <machine/idprom.h> 69 #include <machine/pmap.h> 70 #include <sun2/dev/cons.h> 71 #endif 72 73 #include <sun2/sun2/machdep.h> 74 #include <dev/ic/z8530reg.h> 75 #include <dev/sun/kbd_reg.h> 76 77 /**************************************************************** 78 * Autoconfig 79 ****************************************************************/ 80 81 /* Definition of the driver for autoconfig. */ 82 static int zs_any_match __P((struct device *, struct cfdata *, void *)); 83 static void zs_any_attach __P((struct device *, struct device *, void *)); 84 85 CFATTACH_DECL(zs_obio, sizeof(struct zsc_softc), 86 zs_any_match, zs_any_attach, NULL, NULL) 87 88 CFATTACH_DECL(zs_obmem, sizeof(struct zsc_softc), 89 zs_any_match, zs_any_attach, NULL, NULL) 90 91 CFATTACH_DECL(zs_mbmem, sizeof(struct zsc_softc), 92 zs_any_match, zs_any_attach, NULL, NULL) 93 94 /* 95 * Is the zs chip present? 96 */ 97 static int 98 zs_any_match(parent, cf, aux) 99 struct device *parent; 100 struct cfdata *cf; 101 void *aux; 102 { 103 struct mainbus_attach_args *ma = aux; 104 bus_space_handle_t bh; 105 int matched; 106 107 /* Make sure there is something there... */ 108 if (bus_space_map(ma->ma_bustag, ma->ma_paddr, sizeof(struct zsdevice), 109 0, &bh)) 110 return (0); 111 matched = (bus_space_peek_1(ma->ma_bustag, bh, 0, NULL) == 0); 112 bus_space_unmap(ma->ma_bustag, bh, sizeof(struct zsdevice)); 113 if (!matched) 114 return (0); 115 116 /* Default interrupt priority (always splbio==2) */ 117 if (ma->ma_pri == -1) 118 ma->ma_pri = ZSHARD_PRI; 119 120 return (1); 121 } 122 123 /* 124 * Attach a found zs. 125 */ 126 static void 127 zs_any_attach(parent, self, aux) 128 struct device *parent; 129 struct device *self; 130 void *aux; 131 { 132 struct zsc_softc *zsc = (void *) self; 133 struct mainbus_attach_args *ma = aux; 134 bus_space_handle_t bh; 135 136 zsc->zsc_bustag = ma->ma_bustag; 137 zsc->zsc_dmatag = ma->ma_dmatag; 138 zsc->zsc_promunit = self->dv_unit; 139 zsc->zsc_node = 0; 140 141 /* Map in the device. */ 142 if (bus_space_map(ma->ma_bustag, ma->ma_paddr, sizeof(struct zsdevice), 143 BUS_SPACE_MAP_LINEAR, &bh)) 144 panic("zs_any_attach: can't map"); 145 146 /* This is where we break the bus_space(9) abstraction: */ 147 zs_attach(zsc, (void *)bh, ma->ma_pri); 148 } 149 150 int 151 zs_console_flags(promunit, node, channel) 152 int promunit; 153 int node; 154 int channel; 155 { 156 int cookie, flags = 0; 157 158 /* 159 * Use `promunit' and `channel' to derive the PROM 160 * stdio handles that correspond to this device. 161 */ 162 if (promunit == 0) 163 cookie = PROMDEV_TTYA + channel; 164 else if (promunit == 1 && channel == 0) 165 cookie = PROMDEV_KBD; 166 else 167 cookie = -1; 168 169 /* 170 * We have the console keyboard only if it's a Sun-2 171 * keyboard or better. (i.e., not a Sun-1 parallel kbd). 172 */ 173 if (cookie == prom_stdin() && 174 (cookie != PROMDEV_KBD || prom_kbdid() >= KB_SUN2)) 175 flags |= ZS_HWFLAG_CONSOLE_INPUT; 176 177 /* 178 * Prevent the keyboard from matching the output device 179 * (note that PROMDEV_KBD == PROMDEV_SCREEN == 0!). 180 */ 181 if (cookie != PROMDEV_KBD && cookie == prom_stdout()) 182 flags |= ZS_HWFLAG_CONSOLE_OUTPUT; 183 184 return (flags); 185 } 186 187 #ifdef KGDB 188 /* 189 * Find a zs mapped by the PROM. Currently this only works to find 190 * zs0 on obio. 191 */ 192 void * 193 zs_find_prom(unit) 194 int unit; 195 { 196 bus_addr_t zs0_phys; 197 bus_space_handle_t bh; 198 extern int sun68k_find_prom_map __P((bus_addr_t, bus_type_t, 199 int, bus_space_handle_t *)); 200 201 if (unit != 0) 202 return (NULL); 203 204 /* 205 * The physical address of zs0 is model-dependent. 206 */ 207 zs0_phys = (cpu_machine_id == SUN2_MACH_120 ? 208 0x002000 : 0x7f2000); 209 210 if (sun68k_find_prom_map(zs0_phys, PMAP_OBIO, sizeof(struct zsdevice), &bh)) 211 return (NULL); 212 213 return ((void*) bh); 214 } 215 #endif /* KGDB */ 216
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