amps.c revision 1.19
1/* $NetBSD: amps.c,v 1.19 2011/07/19 15:59:54 dyoung 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 * 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 * Card driver and probe and attach functions to use generic 16550 com 32 * driver for the Atomwide multiport serial podule 33 */ 34 35/* 36 * Thanks to Martin Coulson, Atomwide, for providing the hardware 37 */ 38 39#include <sys/cdefs.h> 40__KERNEL_RCSID(0, "$NetBSD: amps.c,v 1.19 2011/07/19 15:59:54 dyoung Exp $"); 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/ioctl.h> 45#include <sys/select.h> 46#include <sys/tty.h> 47#include <sys/proc.h> 48#include <sys/conf.h> 49#include <sys/file.h> 50#include <sys/uio.h> 51#include <sys/kernel.h> 52#include <sys/syslog.h> 53#include <sys/types.h> 54#include <sys/device.h> 55#include <sys/bus.h> 56 57#include <machine/intr.h> 58#include <machine/io.h> 59#include <acorn32/podulebus/podulebus.h> 60#include <acorn32/podulebus/ampsreg.h> 61#include <dev/ic/comreg.h> 62#include <dev/ic/comvar.h> 63#include <dev/podulebus/podules.h> 64 65#include "locators.h" 66 67/* 68 * Atomwide Mulit-port serial podule device. 69 * 70 * This probes and attaches the top level multi-port serial device to the 71 * podulebus. It then configures the child com devices. 72 */ 73 74/* 75 * Atomwide Multi-port serial card softc structure. 76 * 77 * Contains the device node, podule information and global information 78 * required by the driver such as the card version and the interrupt mask. 79 */ 80 81struct amps_softc { 82 struct device sc_dev; /* device node */ 83 podule_t *sc_podule; /* Our podule info */ 84 int sc_podule_number; /* Our podule number */ 85 bus_space_tag_t sc_iot; /* Bus tag */ 86}; 87 88int amps_probe(device_t, cfdata_t, void *); 89void amps_attach(device_t, device_t, void *); 90 91CFATTACH_DECL(amps, sizeof(struct amps_softc), 92 amps_probe, amps_attach, NULL, NULL); 93 94int amps_print(void *, const char *); 95void amps_shutdown(void *); 96 97/* 98 * Attach arguments for child devices. 99 * Pass the podule details, the parent softc and the channel 100 */ 101 102struct amps_attach_args { 103 bus_space_tag_t aa_iot; /* bus space tag */ 104 unsigned int aa_base; /* base address for port */ 105 int aa_port; /* serial port number */ 106 podulebus_intr_handle_t aa_irq; /* IRQ number */ 107}; 108 109/* 110 * Define prototypes for custom bus space functions. 111 */ 112 113/* Print function used during child config */ 114 115int 116amps_print(void *aux, const char *name) 117{ 118 struct amps_attach_args *aa = aux; 119 120 if (!name) 121 aprint_normal(", port %d", aa->aa_port); 122 123 return(QUIET); 124} 125 126/* 127 * Card probe function 128 * 129 * Just match the manufacturer and podule ID's 130 */ 131 132int 133amps_probe(device_t parent, cfdata_t cf, void *aux) 134{ 135 struct podule_attach_args *pa = aux; 136 137 return (pa->pa_product == PODULE_ATOMWIDE_SERIAL); 138} 139 140/* 141 * Card attach function 142 * 143 * Identify the card version and configure any children. 144 * Install a shutdown handler to kill interrupts on shutdown 145 */ 146 147void 148amps_attach(device_t parent, device_t self, void *aux) 149{ 150 struct amps_softc *sc = device_private(self); 151 struct podule_attach_args *pa = aux; 152 struct amps_attach_args aa; 153 154 /* Note the podule number and validate */ 155 156 if (pa->pa_podule_number == -1) 157 panic("Podule has disappeared !"); 158 159 sc->sc_podule_number = pa->pa_podule_number; 160 sc->sc_podule = pa->pa_podule; 161 podules[sc->sc_podule_number].attached = 1; 162 163 sc->sc_iot = pa->pa_iot; 164 165 /* Install a clean up handler to make sure IRQ's are disabled */ 166/* if (shutdownhook_establish(amps_shutdown, (void *)sc) == NULL) 167 panic("%s: Cannot install shutdown handler", self->dv_xname);*/ 168 169 /* Set the interrupt info for this podule */ 170 171/* sc->sc_podule->irq_addr = pa->pa_podule->slow_base +;*/ /* XXX */ 172/* sc->sc_podule->irq_mask = ;*/ 173 174 printf("\n"); 175 176 /* Configure the children */ 177 178 aa.aa_iot = sc->sc_iot; 179 aa.aa_base = pa->pa_podule->slow_base + AMPS_BASE_OFFSET; 180 aa.aa_base += MAX_AMPS_PORTS * AMPS_PORT_SPACING; 181 aa.aa_irq = pa->pa_podule->interrupt; 182 for (aa.aa_port = 0; aa.aa_port < MAX_AMPS_PORTS; ++aa.aa_port) { 183 aa.aa_base -= AMPS_PORT_SPACING; 184 config_found(self, &aa, amps_print); 185 } 186} 187 188/* 189 * Card shutdown function 190 * 191 * Called via do_shutdown_hooks() during kernel shutdown. 192 * Clear the cards's interrupt mask to stop any podule interrupts. 193 */ 194 195/*void 196amps_shutdown(void *arg) 197{ 198}*/ 199 200/* 201 * Atomwide Multi-Port Serial probe and attach code for the com device. 202 * 203 * This provides a different pair of probe and attach functions 204 * for attaching the com device (dev/ic/com.c) to the Atomwide serial card. 205 */ 206 207struct com_amps_softc { 208 struct com_softc sc_com; /* real "com" softc */ 209 void *sc_ih; /* interrupt handler */ 210 struct evcnt sc_intrcnt; /* interrupt count */ 211}; 212 213/* Prototypes for functions */ 214 215static int com_amps_probe (device_t, cfdata_t , void *); 216static void com_amps_attach (device_t, device_t, void *); 217 218/* device attach structure */ 219 220CFATTACH_DECL_NEW(com_amps, sizeof(struct com_amps_softc), 221 com_amps_probe, com_amps_attach, NULL, NULL); 222 223/* 224 * Controller probe function 225 * 226 * Map all the required I/O space for this channel, make sure interrupts 227 * are disabled and probe the bus. 228 */ 229 230int 231com_amps_probe(device_t parent, cfdata_t cf, void *aux) 232{ 233 bus_space_tag_t iot; 234 bus_space_handle_t ioh; 235 int iobase; 236 int rv = 1; 237 struct amps_attach_args *aa = aux; 238 239 iot = aa->aa_iot; 240 iobase = aa->aa_base; 241 242 /* if it's in use as console, it's there. */ 243 if (!com_is_console(iot, iobase, 0)) { 244 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 245 return 0; 246 } 247 /* 248 * We don't use the generic comprobe1() function as it 249 * is not good enough to identify which ports are present. 250 * 251 * Instead test for the presence of the scratch register 252 */ 253 254 bus_space_write_1(iot, ioh, com_scratch, 0x55); 255 bus_space_write_1(iot, ioh, com_ier, 0); 256 (void)bus_space_read_1(iot, ioh, com_data); 257 if (bus_space_read_1(iot, ioh, com_scratch) != 0x55) 258 rv = 0; 259 bus_space_write_1(iot, ioh, com_scratch, 0xaa); 260 bus_space_write_1(iot, ioh, com_ier, 0); 261 (void)bus_space_read_1(iot, ioh, com_data); 262 if (bus_space_read_1(iot, ioh, com_scratch) != 0xaa) 263 rv = 0; 264 265 bus_space_unmap(iot, ioh, COM_NPORTS); 266 } 267 return (rv); 268} 269 270/* 271 * Controller attach function 272 * 273 * Map all the required I/O space for this port and attach the driver 274 * The generic attach will probe and attach any device. 275 * Install an interrupt handler and we are ready to rock. 276 */ 277 278void 279com_amps_attach(device_t parent, device_t self, void *aux) 280{ 281 struct com_amps_softc *asc = device_private(self); 282 struct com_softc *sc = &asc->sc_com; 283 u_int iobase; 284 bus_space_tag_t iot; 285 bus_space_handle_t ioh; 286 struct amps_attach_args *aa = aux; 287 288 sc->sc_dev = self; 289 iot = aa->aa_iot; 290 iobase = aa->aa_base; 291 292 if (!com_is_console(iot, iobase, &ioh) 293 && bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) 294 panic("comattach: io mapping failed"); 295 COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase); 296 297 sc->sc_frequency = AMPS_FREQ; 298 com_attach_subr(sc); 299 300 evcnt_attach_dynamic(&asc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 301 device_xname(self), "intr"); 302 asc->sc_ih = podulebus_irq_establish(aa->aa_irq, IPL_SERIAL, comintr, 303 sc, &asc->sc_intrcnt); 304} 305