amps.c revision 1.5
1/* $NetBSD: amps.c,v 1.5 2002/10/02 02:23:51 thorpej 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 97CFATTACH_DECL(amps, sizeof(struct amps_softc), 98 amps_probe, amps_attach, NULL, NULL); 99 100/* 101 * Attach arguments for child devices. 102 * Pass the podule details, the parent softc and the channel 103 */ 104 105struct amps_attach_args { 106 bus_space_tag_t aa_iot; /* bus space tag */ 107 unsigned int aa_base; /* base address for port */ 108 int aa_port; /* serial port number */ 109 podulebus_intr_handle_t aa_irq; /* IRQ number */ 110}; 111 112/* 113 * Define prototypes for custom bus space functions. 114 */ 115 116/* Print function used during child config */ 117 118int 119amps_print(aux, name) 120 void *aux; 121 const char *name; 122{ 123 struct amps_attach_args *aa = aux; 124 125 if (!name) 126 printf(", port %d", aa->aa_port); 127 128 return(QUIET); 129} 130 131/* 132 * Card probe function 133 * 134 * Just match the manufacturer and podule ID's 135 */ 136 137int 138amps_probe(parent, cf, aux) 139 struct device *parent; 140 struct cfdata *cf; 141 void *aux; 142{ 143 struct podule_attach_args *pa = (void *)aux; 144 145 return (pa->pa_product == PODULE_ATOMWIDE_SERIAL); 146} 147 148/* 149 * Card attach function 150 * 151 * Identify the card version and configure any children. 152 * Install a shutdown handler to kill interrupts on shutdown 153 */ 154 155void 156amps_attach(parent, self, aux) 157 struct device *parent, *self; 158 void *aux; 159{ 160 struct amps_softc *sc = (void *)self; 161 struct podule_attach_args *pa = (void *)aux; 162 struct amps_attach_args aa; 163 164 /* Note the podule number and validate */ 165 166 if (pa->pa_podule_number == -1) 167 panic("Podule has disappeared !"); 168 169 sc->sc_podule_number = pa->pa_podule_number; 170 sc->sc_podule = pa->pa_podule; 171 podules[sc->sc_podule_number].attached = 1; 172 173 sc->sc_iot = pa->pa_iot; 174 175 /* Install a clean up handler to make sure IRQ's are disabled */ 176/* if (shutdownhook_establish(amps_shutdown, (void *)sc) == NULL) 177 panic("%s: Cannot install shutdown handler", self->dv_xname);*/ 178 179 /* Set the interrupt info for this podule */ 180 181/* sc->sc_podule->irq_addr = pa->pa_podule->slow_base +;*/ /* XXX */ 182/* sc->sc_podule->irq_mask = ;*/ 183 184 printf("\n"); 185 186 /* Configure the children */ 187 188 aa.aa_iot = sc->sc_iot; 189 aa.aa_base = pa->pa_podule->slow_base + AMPS_BASE_OFFSET; 190 aa.aa_base += MAX_AMPS_PORTS * AMPS_PORT_SPACING; 191 aa.aa_irq = pa->pa_podule->interrupt; 192 for (aa.aa_port = 0; aa.aa_port < MAX_AMPS_PORTS; ++aa.aa_port) { 193 aa.aa_base -= AMPS_PORT_SPACING; 194 config_found_sm(self, &aa, amps_print, NULL); 195 } 196} 197 198/* 199 * Card shutdown function 200 * 201 * Called via do_shutdown_hooks() during kernel shutdown. 202 * Clear the cards's interrupt mask to stop any podule interrupts. 203 */ 204 205/*void 206amps_shutdown(arg) 207 void *arg; 208{ 209}*/ 210 211/* 212 * Atomwide Multi-Port Serial probe and attach code for the com device. 213 * 214 * This provides a different pair of probe and attach functions 215 * for attaching the com device (dev/ic/com.c) to the Atomwide serial card. 216 */ 217 218struct com_amps_softc { 219 struct com_softc sc_com; /* real "com" softc */ 220 void *sc_ih; /* interrupt handler */ 221 struct evcnt sc_intrcnt; /* interrupt count */ 222}; 223 224/* Prototypes for functions */ 225 226static int com_amps_probe __P((struct device *, struct cfdata *, void *)); 227static void com_amps_attach __P((struct device *, struct device *, void *)); 228 229/* device attach structure */ 230 231CFATTACH_DECL(com_amps, sizeof(struct com_amps_softc), 232 com_amps_probe, com_amps_attach, NULL, NULL); 233 234/* 235 * Controller probe function 236 * 237 * Map all the required I/O space for this channel, make sure interrupts 238 * are disabled and probe the bus. 239 */ 240 241int 242com_amps_probe(parent, cf, aux) 243 struct device *parent; 244 struct cfdata *cf; 245 void *aux; 246{ 247 bus_space_tag_t iot; 248 bus_space_handle_t ioh; 249 int iobase; 250 int rv = 1; 251 struct amps_attach_args *aa = aux; 252 253 iot = aa->aa_iot; 254 iobase = aa->aa_base; 255 256 /* if it's in use as console, it's there. */ 257 if (!com_is_console(iot, iobase, 0)) { 258 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 259 return 0; 260 } 261 /* 262 * We don't use the generic comprobe1() function as it 263 * is not good enough to identify which ports are present. 264 * 265 * Instead test for the presence of the scratch register 266 */ 267 268 bus_space_write_1(iot, ioh, com_scratch, 0x55); 269 bus_space_write_1(iot, ioh, com_ier, 0); 270 (void)bus_space_read_1(iot, ioh, com_data); 271 if (bus_space_read_1(iot, ioh, com_scratch) != 0x55) 272 rv = 0; 273 bus_space_write_1(iot, ioh, com_scratch, 0xaa); 274 bus_space_write_1(iot, ioh, com_ier, 0); 275 (void)bus_space_read_1(iot, ioh, com_data); 276 if (bus_space_read_1(iot, ioh, com_scratch) != 0xaa) 277 rv = 0; 278 279 bus_space_unmap(iot, ioh, COM_NPORTS); 280 } 281 return (rv); 282} 283 284/* 285 * Controller attach function 286 * 287 * Map all the required I/O space for this port and attach the driver 288 * The generic attach will probe and attach any device. 289 * Install an interrupt handler and we are ready to rock. 290 */ 291 292void 293com_amps_attach(parent, self, aux) 294 struct device *parent, *self; 295 void *aux; 296{ 297 struct com_amps_softc *asc = (void *)self; 298 struct com_softc *sc = &asc->sc_com; 299 u_int iobase; 300 bus_space_tag_t iot; 301 struct amps_attach_args *aa = aux; 302 303 iot = sc->sc_iot = aa->aa_iot; 304 iobase = sc->sc_iobase = aa->aa_base; 305 306 if (!com_is_console(iot, iobase, &sc->sc_ioh) 307 && bus_space_map(iot, iobase, COM_NPORTS, 0, &sc->sc_ioh)) 308 panic("comattach: io mapping failed"); 309 310 sc->sc_frequency = AMPS_FREQ; 311 com_attach_subr(sc); 312 313 evcnt_attach_dynamic(&asc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 314 self->dv_xname, "intr"); 315 asc->sc_ih = podulebus_irq_establish(aa->aa_irq, IPL_SERIAL, comintr, 316 sc, &asc->sc_intrcnt); 317} 318