iomd.c revision 1.7
1 /* $NetBSD: iomd.c,v 1.7 2002/10/01 03:10:13 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1996-1997 Mark Brinicombe. 5 * Copyright (c) 1997 Causality Limited 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Mark Brinicombe. 19 * 4. The name of the company nor the name of the author may be used to 20 * endorse or promote products derived from this software without specific 21 * prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * RiscBSD kernel project 36 * 37 * iomd.c 38 * 39 * Probing and configuration for the IOMD 40 * 41 * Created : 10/10/95 42 * Updated : 18/03/01 for rpckbd as part of the wscons project 43 */ 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/conf.h> 49 #include <sys/malloc.h> 50 #include <sys/device.h> 51 #include <machine/bus.h> 52 #include <machine/cpu.h> 53 #include <machine/intr.h> 54 #include <arm/iomd/iomdreg.h> 55 #include <arm/iomd/iomdvar.h> 56 57 #include "iomd.h" 58 59 /* 60 * IOMD device. 61 * 62 * This probes and attaches the top level IOMD device. 63 * It then configures any children of the IOMD device. 64 */ 65 66 /* 67 * IOMD softc structure. 68 * 69 * Contains the device node, bus space tag, handle and address 70 * and the IOMD id. 71 */ 72 73 struct iomd_softc { 74 struct device sc_dev; /* device node */ 75 bus_space_tag_t sc_iot; /* bus tag */ 76 bus_space_handle_t sc_ioh; /* bus handle */ 77 int sc_id; /* IOMD id */ 78 }; 79 80 static int iomdmatch __P((struct device *parent, struct cfdata *cf, 81 void *aux)); 82 static void iomdattach __P((struct device *parent, struct device *self, 83 void *aux)); 84 static int iomdprint __P((void *aux, const char *iomdbus)); 85 86 CFATTACH_DECL(iomd, sizeof(struct iomd_softc), 87 iomdmatch, iomdattach, NULL, NULL) 88 89 extern struct bus_space iomd_bs_tag; 90 91 int iomd_found; 92 u_int32_t iomd_base = IOMD_BASE; 93 94 /* following flag is used in iomd_irq.s ... has to be cleaned up one day ! */ 95 u_int32_t arm7500_ioc_found = 0; 96 97 98 /* Declare prototypes */ 99 100 /* 101 * int iomdprint(void *aux, const char *name) 102 * 103 * print configuration info for children 104 */ 105 106 static int 107 iomdprint(aux, name) 108 void *aux; 109 const char *name; 110 { 111 /* union iomd_attach_args *ia = aux;*/ 112 113 return(QUIET); 114 } 115 116 /* 117 * int iomdmatch(struct device *parent, struct cfdata *cf, void *aux) 118 * 119 * Just return ok for this if it is device 0 120 */ 121 122 static int 123 iomdmatch(parent, cf, aux) 124 struct device *parent; 125 struct cfdata *cf; 126 void *aux; 127 { 128 if (iomd_found) 129 return 0; 130 return 1; 131 } 132 133 134 /* 135 * void iomdattach(struct device *parent, struct device *dev, void *aux) 136 * 137 * Map the IOMD and identify it. 138 * Then configure the child devices based on the IOMD ID. 139 */ 140 141 static void 142 iomdattach(parent, self, aux) 143 struct device *parent; 144 struct device *self; 145 void *aux; 146 { 147 struct iomd_softc *sc = (struct iomd_softc *)self; 148 /* struct mainbus_attach_args *mb = aux;*/ 149 int refresh; 150 #if 0 151 int dma_time; 152 int combo_time; 153 int loop; 154 #endif 155 union iomd_attach_args ia; 156 bus_space_tag_t iot; 157 bus_space_handle_t ioh; 158 159 /* There can be only 1 IOMD. */ 160 iomd_found = 1; 161 162 iot = sc->sc_iot = &iomd_bs_tag; 163 164 /* Map the IOMD */ 165 if (bus_space_map(iot, (int) iomd_base, IOMD_SIZE, 0, &ioh)) 166 panic("%s: Cannot map registers", self->dv_xname); 167 168 sc->sc_ioh = ioh; 169 170 /* Get the ID */ 171 sc->sc_id = bus_space_read_1(iot, ioh, IOMD_ID0) 172 | (bus_space_read_1(iot, ioh, IOMD_ID1) << 8); 173 printf(": "); 174 175 /* Identify it and get the DRAM refresh rate */ 176 switch (sc->sc_id) { 177 case ARM7500_IOC_ID: 178 printf("ARM7500 IOMD "); 179 refresh = bus_space_read_1(iot, ioh, IOMD_REFCR) & 0x0f; 180 arm7500_ioc_found = 1; 181 break; 182 case ARM7500FE_IOC_ID: 183 printf("ARM7500FE IOMD "); 184 refresh = bus_space_read_1(iot, ioh, IOMD_REFCR) & 0x0f; 185 arm7500_ioc_found = 1; 186 break; 187 case RPC600_IOMD_ID: 188 printf("IOMD20 "); 189 refresh = bus_space_read_1(iot, ioh, IOMD_VREFCR) & 0x09; 190 arm7500_ioc_found = 0; 191 break; 192 default: 193 printf("Unknown IOMD ID=%04x ", sc->sc_id); 194 refresh = -1; 195 arm7500_ioc_found = 0; /* just in case */ 196 break; 197 } 198 printf("version %d\n", bus_space_read_1(iot, ioh, IOMD_VERSION)); 199 200 /* Report the DRAM refresh rate */ 201 printf("%s: ", self->dv_xname); 202 printf("DRAM refresh="); 203 switch (refresh) { 204 case 0x0: 205 printf("off"); 206 break; 207 case 0x1: 208 printf("16us"); 209 break; 210 case 0x2: 211 printf("32us"); 212 break; 213 case 0x4: 214 printf("64us"); 215 break; 216 case 0x8: 217 printf("128us"); 218 break; 219 default: 220 printf("unknown [%02x]", refresh); 221 break; 222 } 223 224 #if 0 225 /* 226 * No point in reporting this as it may get changed when devices are 227 * attached 228 */ 229 dma_time = ReadByte(IOMD_DMATCR); 230 printf(", dma cycle types="); 231 for (loop = 0; loop < 4; ++loop,dma_time = dma_time >> 2) 232 printf("%c", 'A' + (dma_time & 3)); 233 234 combo_time = ReadByte(IOMD_IOTCR); 235 printf(", combo cycle type=%c", 'A' + ((combo_time >> 2) & 3)); 236 #endif 237 printf("\n"); 238 239 /* Set up the external DMA channels */ 240 /* XXX - this should be machine dependant not IOMD dependant */ 241 switch (sc->sc_id) { 242 case ARM7500_IOC_ID: 243 case ARM7500FE_IOC_ID: 244 break; 245 case RPC600_IOMD_ID: 246 /* DMA channels 2 & 3 are external */ 247 bus_space_write_1(iot, ioh, IOMD_DMAEXT, 0x0c); 248 break; 249 } 250 251 /* Configure the child devices */ 252 253 /* Attach clock device */ 254 255 ia.ia_clk.ca_name = "clk"; 256 ia.ia_clk.ca_iot = iot; 257 ia.ia_clk.ca_ioh = ioh; 258 config_found(self, &ia, iomdprint); 259 260 /* Attach kbd device when configured */ 261 if (bus_space_subregion(iot, ioh, IOMD_KBDDAT, 8, &ia.ia_kbd.ka_ioh)) 262 panic("%s: Cannot map kbd registers", self->dv_xname); 263 ia.ia_kbd.ka_name = "kbd"; 264 ia.ia_kbd.ka_iot = iot; 265 ia.ia_kbd.ka_rxirq = IRQ_KBDRX; 266 ia.ia_kbd.ka_txirq = IRQ_KBDTX; 267 config_found(self, &ia, iomdprint); 268 269 /* Attach rpckbc device when configured */ 270 ia.ia_kbd.ka_name = "rpckbd"; 271 ia.ia_kbd.ka_rxirq = IRQ_KBDRX; 272 ia.ia_kbd.ka_txirq = IRQ_KBDTX; 273 config_found(self, &ia, iomdprint); 274 275 /* Attach iic device */ 276 277 if (bus_space_subregion(iot, ioh, IOMD_IOCR, 4, &ia.ia_iic.ia_ioh)) 278 panic("%s: Cannot map iic registers", self->dv_xname); 279 ia.ia_iic.ia_name = "iic"; 280 ia.ia_iic.ia_iot = iot; 281 ia.ia_iic.ia_irq = -1; 282 config_found(self, &ia, iomdprint); 283 284 switch (sc->sc_id) { 285 case ARM7500_IOC_ID: 286 case ARM7500FE_IOC_ID: 287 /* Attach opms device */ 288 289 if (bus_space_subregion(iot, ioh, IOMD_MSDATA, 8, &ia.ia_opms.pa_ioh)) 290 panic("%s: Cannot map opms registers", self->dv_xname); 291 ia.ia_opms.pa_name = "opms"; 292 ia.ia_opms.pa_iot = iot; 293 ia.ia_opms.pa_irq = IRQ_MSDRX; 294 config_found(self, &ia, iomdprint); 295 break; 296 case RPC600_IOMD_ID: 297 /* Attach (ws)qms device */ 298 299 if (bus_space_subregion(iot, ioh, IOMD_MOUSEX, 8, &ia.ia_qms.qa_ioh)) 300 panic("%s: Cannot map qms registers", self->dv_xname); 301 302 if (bus_space_map(iot, IO_MOUSE_BUTTONS, 4, 0, &ia.ia_qms.qa_ioh_but)) 303 panic("%s: Cannot map registers", self->dv_xname); 304 ia.ia_qms.qa_name = "qms"; 305 ia.ia_qms.qa_iot = iot; 306 ia.ia_qms.qa_irq = IRQ_VSYNC; 307 config_found(self, &ia, iomdprint); 308 break; 309 } 310 } 311 312 /* End of iomd.c */ 313
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