sio16.c revision 1.22
1/* $NetBSD: sio16.c,v 1.22 2009/09/17 16:28:12 tsutsui 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 1.22 2009/09/17 16:28:12 tsutsui 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(device_t, cfdata_t, void *); 68static void sio16_attach(device_t, device_t, 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 77 /* sbus information */ 78 bus_space_tag_t sc_tag; /* bus tag for below */ 79 bus_space_handle_t sc_configreg; /* configuration register */ 80 bus_space_handle_t sc_reg[2]; /* cd180 register sets */ 81 bus_space_handle_t sc_ack; /* interrupt acknowledgement */ 82#define SIO16_1600SE 0x00000001 83 84 u_int sc_clk; 85 86 /* cd180 information */ 87 int sc_ncd180; 88 89}; 90 91CFATTACH_DECL(siosixteen, sizeof(struct sio16_softc), 92 sio16_match, sio16_attach, NULL, NULL); 93 94struct sio16_attach_args { 95 bus_space_tag_t cd_tag; 96 bus_space_handle_t cd_handle; 97 u_char (*cd_ackfunc)(void *, int); 98 void *cd_ackfunc_arg; 99 u_int cd_osc; 100}; 101 102/* 103 * device match routine: is there an sio16 present? 104 * 105 * note that we can not put "sio16" in the cfdriver, as this is an 106 * illegal name, so we have to hard code it here. 107 */ 108#define SIO16_ROM_NAME "sio16" 109int 110sio16_match(device_t parent, cfdata_t cf, void *aux) 111{ 112 struct sbus_attach_args *sa = aux; 113 114 /* does the prom think i'm an sio16? */ 115 if (strcmp(SIO16_ROM_NAME, sa->sa_name) != 0) 116 return (0); 117 118 return (1); 119} 120 121/* 122 * device attach routine: go attach all sub devices. 123 */ 124void 125sio16_attach(device_t parent, device_t self, void *aux) 126{ 127 struct sbus_attach_args *sa = aux; 128 struct sio16_softc *sc = (struct sio16_softc *)self; 129 bus_space_handle_t h; 130 char *mode, *model; 131 int i; 132 133 if (sa->sa_nreg != 4) 134 panic("sio16_attach: got %d registers intead of 4", 135 sa->sa_nreg); 136 137 /* copy our bus tag, we will need it */ 138 sc->sc_tag = sa->sa_bustag; 139 140 /* 141 * sio16 has 4 register mappings. a single byte configuration 142 * register, 2 128 byte regions for the cd180 registers, and 143 * a 4 byte region for interrupt acknowledgement. 144 */ 145 if (sbus_bus_map(sa->sa_bustag, 146 sa->sa_reg[0].oa_space, 147 sa->sa_reg[0].oa_base, 148 sa->sa_reg[0].oa_size, 149 0, &h) != 0) { 150 printf("%s at sbus: can not map registers 0\n", 151 device_xname(self)); 152 return; 153 } 154 sc->sc_configreg = h; 155 if (sbus_bus_map(sa->sa_bustag, 156 sa->sa_reg[1].sbr_slot, 157 sa->sa_reg[1].sbr_offset, 158 sa->sa_reg[1].sbr_size, 159 0, &h) != 0) { 160 printf("%s at sbus: can not map registers 1\n", 161 device_xname(self)); 162 return; 163 } 164 sc->sc_reg[0] = h; 165 if (sbus_bus_map(sa->sa_bustag, 166 sa->sa_reg[2].sbr_slot, 167 sa->sa_reg[2].sbr_offset, 168 sa->sa_reg[2].sbr_size, 169 0, &h) != 0) { 170 printf("%s at sbus: can not map registers 2\n", 171 device_xname(self)); 172 return; 173 } 174 sc->sc_reg[1] = h; 175 if (sbus_bus_map(sa->sa_bustag, 176 sa->sa_reg[3].sbr_slot, 177 sa->sa_reg[3].sbr_offset, 178 sa->sa_reg[3].sbr_size, 179 0, &h) != 0) { 180 printf("%s at sbus: can not map registers 3\n", 181 device_xname(self)); 182 return; 183 } 184 sc->sc_ack = h; 185 186 mode = prom_getpropstring(sa->sa_node, "mode"); 187 if (mode) 188 printf(", %s mode", mode); 189 190 /* get the clock frequency */ 191 sc->sc_clk = prom_getpropint(sa->sa_node, "clk", 24000); 192 193 model = prom_getpropstring(sa->sa_node, "model"); 194 if (model == 0) { 195 printf(", no model property, bailing\n"); 196 return; 197 } 198 199 /* are we an 1600se? */ 200 if (strcmp(model, "1600se") == 0) { 201 printf(", 16 channels"); 202 sc->sc_ncd180 = 2; 203 } else { 204 printf(", don't know model %s, bailing\n", model); 205 return; 206 } 207 208 /* establish interrupt channel */ 209 (void)bus_intr_establish(sa->sa_bustag, sa->sa_pri, IPL_TTY, 210 cd18xx_hardintr, sc); 211 212 /* reset the board, and turn on interrupts and I/O */ 213 bus_space_write_1(sa->sa_bustag, sc->sc_configreg, 0, 0); 214 delay(100); 215 bus_space_write_1(sa->sa_bustag, sc->sc_configreg, 0, 216 SIO16_CONFIGREG_ENABLE_IO | SIO16_CONFIGREG_ENABLE_IRQ | 217 (((sa->sa_pri) & 0x0f) >> 2)); 218 delay(10000); 219 220 printf("\n"); 221 222 /* finally, configure the clcd's underneath */ 223 for (i = 0; i < sc->sc_ncd180; i++) { 224 struct sio16_attach_args cd; 225 226 cd.cd_tag = sa->sa_bustag; 227 cd.cd_osc = sc->sc_clk * 100; 228 cd.cd_handle = (bus_space_handle_t)sc->sc_reg[i]; 229 cd.cd_ackfunc = sio16_ackfunc; 230 cd.cd_ackfunc_arg = sc; 231 (void)config_found(self, (void *)&cd, NULL); 232 } 233} 234 235/* 236 * note that the addresses used in this function match those assigned 237 * in clcd_attach() below, or the various service match routines. 238 */ 239u_char 240sio16_ackfunc(void *v, int who) 241{ 242 struct sio16_softc *sc = v; 243 bus_size_t addr; 244 245 switch (who) { 246 case CD18xx_INTRACK_RxINT: 247 case CD18xx_INTRACK_REINT: 248 addr = SIO16_RINT_ACK; 249 break; 250 case CD18xx_INTRACK_TxINT: 251 addr = SIO16_TINT_ACK; 252 break; 253 case CD18xx_INTRACK_MxINT: 254 addr = SIO16_MINT_ACK; 255 break; 256 default: 257 panic("%s: sio16_ackfunc: unknown ackfunc %d", 258 device_xname(&sc->sc_dev), who); 259 } 260 return (bus_space_read_1(sc->sc_tag, sc->sc_ack, addr)); 261} 262 263/* 264 * we attach two `clcd' instances per 1600se, that each call the 265 * backend cd18xx driver for help. 266 */ 267static int clcd_match(device_t, cfdata_t, void *); 268static void clcd_attach(device_t, device_t, void *); 269 270CFATTACH_DECL(clcd, sizeof(struct cd18xx_softc), 271 clcd_match, clcd_attach, NULL, NULL); 272 273static int 274clcd_match(device_t parent, cfdata_t cf, void *aux) 275{ 276 277 /* XXX */ 278 return 1; 279} 280 281static void 282clcd_attach(device_t parent, device_t self, void *aux) 283{ 284 struct cd18xx_softc *sc = (struct cd18xx_softc *)self; 285 struct sio16_attach_args *args = aux; 286 287 sc->sc_tag = args->cd_tag; 288 sc->sc_handle = args->cd_handle; 289 sc->sc_osc = args->cd_osc; 290 sc->sc_ackfunc = args->cd_ackfunc; 291 sc->sc_ackfunc_arg = args->cd_ackfunc_arg; 292 sc->sc_msmr = SIO16_MINT_ACK; 293 sc->sc_tsmr = SIO16_TINT_ACK; 294 sc->sc_rsmr = SIO16_RINT_ACK; 295 296 /* call the common code */ 297 cd18xx_attach(sc); 298} 299