sio16.c revision 1.20
1/* $NetBSD: sio16.c,v 1.20 2009/05/12 13:20:06 cegger Exp $ */ 2 3/* 4 * Copyright (c) 1998, 2001 Matthew R. Green 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29/* 30 * aurora technologies nova16 driver. this board is an sbus card with 31 * an external 16 port serial box. there are two cirrus logic cd180 32 * 8 port serial chips used in the implementation. 33 * 34 * thanks go to Oliver Aldulea <oli@morcov.bv.ro> for writing the 35 * linux driver of this that helped clear up a couple of issues. 36 */ 37 38#include <sys/cdefs.h> 39__KERNEL_RCSID(0, "$NetBSD: sio16.c,v 1.20 2009/05/12 13:20:06 cegger Exp $"); 40 41#include <sys/param.h> 42#include <sys/conf.h> 43#include <sys/device.h> 44#include <sys/systm.h> 45 46#include <machine/autoconf.h> 47 48#include <dev/ic/cd18xxvar.h> 49#include <dev/ic/cd18xxreg.h> 50 51#include "ioconf.h" 52#include "locators.h" 53 54/* 1600se configuration register bits */ 55#define SIO16_CONFIGREG_ENABLE_IO 8 56#define SIO16_CONFIGREG_ENABLE_IRQ 4 57 58/* 1600se interrupt ackknowledge register bytes */ 59#define SIO16_MINT_ACK 1 /* modem interrupt acknowledge */ 60#define SIO16_TINT_ACK 2 /* tx interrupt acknowledge */ 61#define SIO16_RINT_ACK 3 /* rx interrupt acknowledge */ 62 63/* 64 * device cfattach and cfdriver definitions, plus the routine we pass 65 * to the cd18xx code or interrupt acknowledgement. 66 */ 67static int sio16_match(struct device *, cfdata_t, void *); 68static void sio16_attach(struct device *, struct device *, void *); 69static u_char sio16_ackfunc(void *, int who); 70 71/* 72 * define the sio16 per-device softc. 73 */ 74struct sio16_softc { 75 struct device sc_dev; /* must be first */ 76 struct sbusdev sc_sd; /* for sbus drivers */ 77 78 /* sbus information */ 79 bus_space_tag_t sc_tag; /* bus tag for below */ 80 bus_space_handle_t sc_configreg; /* configuration register */ 81 bus_space_handle_t sc_reg[2]; /* cd180 register sets */ 82 bus_space_handle_t sc_ack; /* interrupt acknowledgement */ 83#define SIO16_1600SE 0x00000001 84 85 u_int sc_clk; 86 87 /* cd180 information */ 88 int sc_ncd180; 89 90}; 91 92CFATTACH_DECL(siosixteen, sizeof(struct sio16_softc), 93 sio16_match, sio16_attach, NULL, NULL); 94 95struct sio16_attach_args { 96 bus_space_tag_t cd_tag; 97 bus_space_handle_t cd_handle; 98 u_char (*cd_ackfunc)(void *, int); 99 void *cd_ackfunc_arg; 100 u_int cd_osc; 101}; 102 103/* 104 * device match routine: is there an sio16 present? 105 * 106 * note that we can not put "sio16" in the cfdriver, as this is an 107 * illegal name, so we have to hard code it here. 108 */ 109#define SIO16_ROM_NAME "sio16" 110int 111sio16_match(struct device *parent, cfdata_t cf, void *aux) 112{ 113 struct sbus_attach_args *sa = aux; 114 115 /* does the prom think i'm an sio16? */ 116 if (strcmp(SIO16_ROM_NAME, sa->sa_name) != 0) 117 return (0); 118 119 return (1); 120} 121 122/* 123 * device attach routine: go attach all sub devices. 124 */ 125void 126sio16_attach(struct device *parent, struct device *self, void *aux) 127{ 128 struct sbus_attach_args *sa = aux; 129 struct sio16_softc *sc = (struct sio16_softc *)self; 130 bus_space_handle_t h; 131 char *mode, *model; 132 int i; 133 134 if (sa->sa_nreg != 4) 135 panic("sio16_attach: got %d registers intead of 4", 136 sa->sa_nreg); 137 138 /* copy our bus tag, we will need it */ 139 sc->sc_tag = sa->sa_bustag; 140 141 /* 142 * sio16 has 4 register mappings. a single byte configuration 143 * register, 2 128 byte regions for the cd180 registers, and 144 * a 4 byte region for interrupt acknowledgement. 145 */ 146 if (sbus_bus_map(sa->sa_bustag, 147 sa->sa_reg[0].oa_space, 148 sa->sa_reg[0].oa_base, 149 sa->sa_reg[0].oa_size, 150 0, &h) != 0) { 151 printf("%s at sbus: can not map registers 0\n", 152 device_xname(self)); 153 return; 154 } 155 sc->sc_configreg = h; 156 if (sbus_bus_map(sa->sa_bustag, 157 sa->sa_reg[1].sbr_slot, 158 sa->sa_reg[1].sbr_offset, 159 sa->sa_reg[1].sbr_size, 160 0, &h) != 0) { 161 printf("%s at sbus: can not map registers 1\n", 162 device_xname(self)); 163 return; 164 } 165 sc->sc_reg[0] = h; 166 if (sbus_bus_map(sa->sa_bustag, 167 sa->sa_reg[2].sbr_slot, 168 sa->sa_reg[2].sbr_offset, 169 sa->sa_reg[2].sbr_size, 170 0, &h) != 0) { 171 printf("%s at sbus: can not map registers 2\n", 172 device_xname(self)); 173 return; 174 } 175 sc->sc_reg[1] = h; 176 if (sbus_bus_map(sa->sa_bustag, 177 sa->sa_reg[3].sbr_slot, 178 sa->sa_reg[3].sbr_offset, 179 sa->sa_reg[3].sbr_size, 180 0, &h) != 0) { 181 printf("%s at sbus: can not map registers 3\n", 182 device_xname(self)); 183 return; 184 } 185 sc->sc_ack = h; 186 187 mode = prom_getpropstring(sa->sa_node, "mode"); 188 if (mode) 189 printf(", %s mode", mode); 190 191 /* get the clock frequency */ 192 sc->sc_clk = prom_getpropint(sa->sa_node, "clk", 24000); 193 194 model = prom_getpropstring(sa->sa_node, "model"); 195 if (model == 0) { 196 printf(", no model property, bailing\n"); 197 return; 198 } 199 200 /* are we an 1600se? */ 201 if (strcmp(model, "1600se") == 0) { 202 printf(", 16 channels"); 203 sc->sc_ncd180 = 2; 204 } else { 205 printf(", don't know model %s, bailing\n", model); 206 return; 207 } 208 209 /* set up our sbus connections */ 210 sbus_establish(&sc->sc_sd, &sc->sc_dev); 211 212 /* establish interrupt channel */ 213 (void)bus_intr_establish(sa->sa_bustag, sa->sa_pri, IPL_TTY, 214 cd18xx_hardintr, sc); 215 216 /* reset the board, and turn on interrupts and I/O */ 217 bus_space_write_1(sa->sa_bustag, sc->sc_configreg, 0, 0); 218 delay(100); 219 bus_space_write_1(sa->sa_bustag, sc->sc_configreg, 0, 220 SIO16_CONFIGREG_ENABLE_IO | SIO16_CONFIGREG_ENABLE_IRQ | 221 (((sa->sa_pri) & 0x0f) >> 2)); 222 delay(10000); 223 224 printf("\n"); 225 226 /* finally, configure the clcd's underneath */ 227 for (i = 0; i < sc->sc_ncd180; i++) { 228 struct sio16_attach_args cd; 229 230 cd.cd_tag = sa->sa_bustag; 231 cd.cd_osc = sc->sc_clk * 100; 232 cd.cd_handle = (bus_space_handle_t)sc->sc_reg[i]; 233 cd.cd_ackfunc = sio16_ackfunc; 234 cd.cd_ackfunc_arg = sc; 235 (void)config_found(self, (void *)&cd, NULL); 236 } 237} 238 239/* 240 * note that the addresses used in this function match those assigned 241 * in clcd_attach() below, or the various service match routines. 242 */ 243u_char 244sio16_ackfunc(void *v, int who) 245{ 246 struct sio16_softc *sc = v; 247 bus_size_t addr; 248 249 switch (who) { 250 case CD18xx_INTRACK_RxINT: 251 case CD18xx_INTRACK_REINT: 252 addr = SIO16_RINT_ACK; 253 break; 254 case CD18xx_INTRACK_TxINT: 255 addr = SIO16_TINT_ACK; 256 break; 257 case CD18xx_INTRACK_MxINT: 258 addr = SIO16_MINT_ACK; 259 break; 260 default: 261 panic("%s: sio16_ackfunc: unknown ackfunc %d", 262 device_xname(&sc->sc_dev), who); 263 } 264 return (bus_space_read_1(sc->sc_tag, sc->sc_ack, addr)); 265} 266 267/* 268 * we attach two `clcd' instances per 1600se, that each call the 269 * backend cd18xx driver for help. 270 */ 271static int clcd_match(struct device *, cfdata_t, void *); 272static void clcd_attach(struct device *, struct device *, void *); 273 274CFATTACH_DECL(clcd, sizeof(struct cd18xx_softc), 275 clcd_match, clcd_attach, NULL, NULL); 276 277static int 278clcd_match(struct device *parent, cfdata_t cf, void *aux) 279{ 280 281 /* XXX */ 282 return 1; 283} 284 285static void 286clcd_attach(struct device *parent, struct device *self, void *aux) 287{ 288 struct cd18xx_softc *sc = (struct cd18xx_softc *)self; 289 struct sio16_attach_args *args = aux; 290 291 sc->sc_tag = args->cd_tag; 292 sc->sc_handle = args->cd_handle; 293 sc->sc_osc = args->cd_osc; 294 sc->sc_ackfunc = args->cd_ackfunc; 295 sc->sc_ackfunc_arg = args->cd_ackfunc_arg; 296 sc->sc_msmr = SIO16_MINT_ACK; 297 sc->sc_tsmr = SIO16_TINT_ACK; 298 sc->sc_rsmr = SIO16_RINT_ACK; 299 300 /* call the common code */ 301 cd18xx_attach(sc); 302} 303