amps.c revision 1.3
1/* $NetBSD: amps.c,v 1.3 2002/05/22 22:43:17 bjh21 Exp $ */ 2 3/*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Mark Brinicombe of Causality Limited. 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 * Card driver and probe and attach functions to use generic 16550 com 39 * driver for the Atomwide multiport serial podule 40 */ 41 42/* 43 * Thanks to Martin Coulson, Atomwide, for providing the hardware 44 */ 45 46#include <sys/param.h> 47#include <sys/systm.h> 48#include <sys/ioctl.h> 49#include <sys/select.h> 50#include <sys/tty.h> 51#include <sys/proc.h> 52#include <sys/user.h> 53#include <sys/conf.h> 54#include <sys/file.h> 55#include <sys/uio.h> 56#include <sys/kernel.h> 57#include <sys/syslog.h> 58#include <sys/types.h> 59#include <sys/device.h> 60 61#include <machine/intr.h> 62#include <machine/io.h> 63#include <machine/bus.h> 64#include <acorn32/podulebus/podulebus.h> 65#include <acorn32/podulebus/ampsreg.h> 66#include <dev/ic/comreg.h> 67#include <dev/ic/comvar.h> 68#include <dev/podulebus/podules.h> 69 70#include "locators.h" 71 72/* 73 * Atomwide Mulit-port serial podule device. 74 * 75 * This probes and attaches the top level multi-port serial device to the 76 * podulebus. It then configures the child com devices. 77 */ 78 79/* 80 * Atomwide Multi-port serial card softc structure. 81 * 82 * Contains the device node, podule information and global information 83 * required by the driver such as the card version and the interrupt mask. 84 */ 85 86struct amps_softc { 87 struct device sc_dev; /* device node */ 88 podule_t *sc_podule; /* Our podule info */ 89 int sc_podule_number; /* Our podule number */ 90 bus_space_tag_t sc_iot; /* Bus tag */ 91}; 92 93int amps_probe __P((struct device *, struct cfdata *, void *)); 94void amps_attach __P((struct device *, struct device *, void *)); 95void amps_shutdown __P((void *arg)); 96 97struct cfattach amps_ca = { 98 sizeof(struct amps_softc), amps_probe, amps_attach 99}; 100 101/* 102 * Attach arguments for child devices. 103 * Pass the podule details, the parent softc and the channel 104 */ 105 106struct amps_attach_args { 107 bus_space_tag_t aa_iot; /* bus space tag */ 108 unsigned int aa_base; /* base address for port */ 109 int aa_port; /* serial port number */ 110 podulebus_intr_handle_t aa_irq; /* IRQ number */ 111}; 112 113/* 114 * Define prototypes for custom bus space functions. 115 */ 116 117/* Print function used during child config */ 118 119int 120amps_print(aux, name) 121 void *aux; 122 const char *name; 123{ 124 struct amps_attach_args *aa = aux; 125 126 if (!name) 127 printf(", port %d", aa->aa_port); 128 129 return(QUIET); 130} 131 132/* 133 * Card probe function 134 * 135 * Just match the manufacturer and podule ID's 136 */ 137 138int 139amps_probe(parent, cf, aux) 140 struct device *parent; 141 struct cfdata *cf; 142 void *aux; 143{ 144 struct podule_attach_args *pa = (void *)aux; 145 146 return (pa->pa_product == PODULE_ATOMWIDE_SERIAL); 147} 148 149/* 150 * Card attach function 151 * 152 * Identify the card version and configure any children. 153 * Install a shutdown handler to kill interrupts on shutdown 154 */ 155 156void 157amps_attach(parent, self, aux) 158 struct device *parent, *self; 159 void *aux; 160{ 161 struct amps_softc *sc = (void *)self; 162 struct podule_attach_args *pa = (void *)aux; 163 struct amps_attach_args aa; 164 165 /* Note the podule number and validate */ 166 167 if (pa->pa_podule_number == -1) 168 panic("Podule has disappeared !"); 169 170 sc->sc_podule_number = pa->pa_podule_number; 171 sc->sc_podule = pa->pa_podule; 172 podules[sc->sc_podule_number].attached = 1; 173 174 sc->sc_iot = pa->pa_iot; 175 176 /* Install a clean up handler to make sure IRQ's are disabled */ 177/* if (shutdownhook_establish(amps_shutdown, (void *)sc) == NULL) 178 panic("%s: Cannot install shutdown handler", self->dv_xname);*/ 179 180 /* Set the interrupt info for this podule */ 181 182/* sc->sc_podule->irq_addr = pa->pa_podule->slow_base +;*/ /* XXX */ 183/* sc->sc_podule->irq_mask = ;*/ 184 185 printf("\n"); 186 187 /* Configure the children */ 188 189 aa.aa_iot = sc->sc_iot; 190 aa.aa_base = pa->pa_podule->slow_base + AMPS_BASE_OFFSET; 191 aa.aa_base += MAX_AMPS_PORTS * AMPS_PORT_SPACING; 192 aa.aa_irq = pa->pa_podule->interrupt; 193 for (aa.aa_port = 0; aa.aa_port < MAX_AMPS_PORTS; ++aa.aa_port) { 194 aa.aa_base -= AMPS_PORT_SPACING; 195 config_found_sm(self, &aa, amps_print, NULL); 196 } 197} 198 199/* 200 * Card shutdown function 201 * 202 * Called via do_shutdown_hooks() during kernel shutdown. 203 * Clear the cards's interrupt mask to stop any podule interrupts. 204 */ 205 206/*void 207amps_shutdown(arg) 208 void *arg; 209{ 210}*/ 211 212/* 213 * Atomwide Multi-Port Serial probe and attach code for the com device. 214 * 215 * This provides a different pair of probe and attach functions 216 * for attaching the com device (dev/ic/com.c) to the Atomwide serial card. 217 */ 218 219struct com_amps_softc { 220 struct com_softc sc_com; /* real "com" softc */ 221 void *sc_ih; /* interrupt handler */ 222 struct evcnt sc_intrcnt; /* interrupt count */ 223}; 224 225/* Prototypes for functions */ 226 227static int com_amps_probe __P((struct device *, struct cfdata *, void *)); 228static void com_amps_attach __P((struct device *, struct device *, void *)); 229 230/* device attach structure */ 231 232struct cfattach com_amps_ca = { 233 sizeof(struct com_amps_softc), com_amps_probe, com_amps_attach 234}; 235 236/* 237 * Controller probe function 238 * 239 * Map all the required I/O space for this channel, make sure interrupts 240 * are disabled and probe the bus. 241 */ 242 243int 244com_amps_probe(parent, cf, aux) 245 struct device *parent; 246 struct cfdata *cf; 247 void *aux; 248{ 249 bus_space_tag_t iot; 250 bus_space_handle_t ioh; 251 int iobase; 252 int rv = 1; 253 struct amps_attach_args *aa = aux; 254 255 iot = aa->aa_iot; 256 iobase = aa->aa_base; 257 258 /* if it's in use as console, it's there. */ 259 if (!com_is_console(iot, iobase, 0)) { 260 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 261 return 0; 262 } 263 /* 264 * We don't use the generic comprobe1() function as it 265 * is not good enough to identify which ports are present. 266 * 267 * Instead test for the presence of the scratch register 268 */ 269 270 bus_space_write_1(iot, ioh, com_scratch, 0x55); 271 bus_space_write_1(iot, ioh, com_ier, 0); 272 (void)bus_space_read_1(iot, ioh, com_data); 273 if (bus_space_read_1(iot, ioh, com_scratch) != 0x55) 274 rv = 0; 275 bus_space_write_1(iot, ioh, com_scratch, 0xaa); 276 bus_space_write_1(iot, ioh, com_ier, 0); 277 (void)bus_space_read_1(iot, ioh, com_data); 278 if (bus_space_read_1(iot, ioh, com_scratch) != 0xaa) 279 rv = 0; 280 281 bus_space_unmap(iot, ioh, COM_NPORTS); 282 } 283 return (rv); 284} 285 286/* 287 * Controller attach function 288 * 289 * Map all the required I/O space for this port and attach the driver 290 * The generic attach will probe and attach any device. 291 * Install an interrupt handler and we are ready to rock. 292 */ 293 294void 295com_amps_attach(parent, self, aux) 296 struct device *parent, *self; 297 void *aux; 298{ 299 struct com_amps_softc *asc = (void *)self; 300 struct com_softc *sc = &asc->sc_com; 301 u_int iobase; 302 bus_space_tag_t iot; 303 struct amps_attach_args *aa = aux; 304 305 iot = sc->sc_iot = aa->aa_iot; 306 iobase = sc->sc_iobase = aa->aa_base; 307 308 if (!com_is_console(iot, iobase, &sc->sc_ioh) 309 && bus_space_map(iot, iobase, COM_NPORTS, 0, &sc->sc_ioh)) 310 panic("comattach: io mapping failed"); 311 312 sc->sc_frequency = AMPS_FREQ; 313 com_attach_subr(sc); 314 315 evcnt_attach_dynamic(&asc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 316 self->dv_xname, "intr"); 317 asc->sc_ih = podulebus_irq_establish(aa->aa_irq, IPL_SERIAL, comintr, 318 sc, &asc->sc_intrcnt); 319} 320