1 /* $NetBSD: iomd.c,v 1.13 2004/02/08 13:39:21 bjh21 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/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: iomd.c,v 1.13 2004/02/08 13:39:21 bjh21 Exp $"); 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/conf.h> 52 #include <sys/malloc.h> 53 #include <sys/device.h> 54 #include <machine/bus.h> 55 #include <machine/cpu.h> 56 #include <machine/intr.h> 57 #include <arm/iomd/iomdreg.h> 58 #include <arm/iomd/iomdvar.h> 59 60 #include "iomd.h" 61 62 /* 63 * IOMD device. 64 * 65 * This probes and attaches the top level IOMD device. 66 * It then configures any children of the IOMD device. 67 */ 68 69 /* 70 * IOMD softc structure. 71 * 72 * Contains the device node, bus space tag, handle and address 73 * and the IOMD id. 74 */ 75 76 struct iomd_softc { 77 struct device sc_dev; /* device node */ 78 bus_space_tag_t sc_iot; /* bus tag */ 79 bus_space_handle_t sc_ioh; /* bus handle */ 80 int sc_id; /* IOMD id */ 81 }; 82 83 static int iomdmatch __P((struct device *parent, struct cfdata *cf, 84 void *aux)); 85 static void iomdattach __P((struct device *parent, struct device *self, 86 void *aux)); 87 static int iomdprint __P((void *aux, const char *iomdbus)); 88 89 CFATTACH_DECL(iomd, sizeof(struct iomd_softc), 90 iomdmatch, iomdattach, NULL, NULL); 91 92 extern struct bus_space iomd_bs_tag; 93 94 int iomd_found; 95 u_int32_t iomd_base = IOMD_BASE; 96 97 /* following flag is used in iomd_irq.s ... has to be cleaned up one day ! */ 98 u_int32_t arm7500_ioc_found = 0; 99 100 101 /* Declare prototypes */ 102 103 /* 104 * int iomdprint(void *aux, const char *name) 105 * 106 * print configuration info for children 107 */ 108 109 static int 110 iomdprint(aux, name) 111 void *aux; 112 const char *name; 113 { 114 /* union iomd_attach_args *ia = aux;*/ 115 116 return(QUIET); 117 } 118 119 /* 120 * int iomdmatch(struct device *parent, struct cfdata *cf, void *aux) 121 * 122 * Just return ok for this if it is device 0 123 */ 124 125 static int 126 iomdmatch(parent, cf, aux) 127 struct device *parent; 128 struct cfdata *cf; 129 void *aux; 130 { 131 if (iomd_found) 132 return 0; 133 return 1; 134 } 135 136 137 /* 138 * void iomdattach(struct device *parent, struct device *dev, void *aux) 139 * 140 * Map the IOMD and identify it. 141 * Then configure the child devices based on the IOMD ID. 142 */ 143 144 static void 145 iomdattach(parent, self, aux) 146 struct device *parent; 147 struct device *self; 148 void *aux; 149 { 150 struct iomd_softc *sc = (struct iomd_softc *)self; 151 /* struct mainbus_attach_args *mb = aux;*/ 152 int refresh; 153 #if 0 154 int i, tmp; 155 #endif 156 union iomd_attach_args ia; 157 bus_space_tag_t iot; 158 bus_space_handle_t ioh; 159 160 /* There can be only 1 IOMD. */ 161 iomd_found = 1; 162 163 iot = sc->sc_iot = &iomd_bs_tag; 164 165 /* Map the IOMD */ 166 if (bus_space_map(iot, (int) iomd_base, IOMD_SIZE, 0, &ioh)) 167 panic("%s: Cannot map registers", self->dv_xname); 168 169 sc->sc_ioh = ioh; 170 171 /* Get the ID */ 172 sc->sc_id = bus_space_read_1(iot, ioh, IOMD_ID0) 173 | (bus_space_read_1(iot, ioh, IOMD_ID1) << 8); 174 printf(": "); 175 176 /* Identify it and get the DRAM refresh rate */ 177 switch (sc->sc_id) { 178 case ARM7500_IOC_ID: 179 printf("ARM7500 IOMD "); 180 refresh = bus_space_read_1(iot, ioh, IOMD_REFCR) & 0x0f; 181 arm7500_ioc_found = 1; 182 break; 183 case ARM7500FE_IOC_ID: 184 printf("ARM7500FE IOMD "); 185 refresh = bus_space_read_1(iot, ioh, IOMD_REFCR) & 0x0f; 186 arm7500_ioc_found = 1; 187 break; 188 case RPC600_IOMD_ID: 189 printf("IOMD20 "); 190 refresh = bus_space_read_1(iot, ioh, IOMD_VREFCR) & 0x09; 191 arm7500_ioc_found = 0; 192 break; 193 default: 194 printf("Unknown IOMD ID=%04x ", sc->sc_id); 195 refresh = -1; 196 arm7500_ioc_found = 0; /* just in case */ 197 break; 198 } 199 printf("version %d\n", bus_space_read_1(iot, ioh, IOMD_VERSION)); 200 201 /* Report the DRAM refresh rate */ 202 printf("%s: ", self->dv_xname); 203 printf("DRAM refresh="); 204 switch (refresh) { 205 case 0x0: 206 printf("off"); 207 break; 208 case 0x1: 209 printf("16us"); 210 break; 211 case 0x2: 212 printf("32us"); 213 break; 214 case 0x4: 215 printf("64us"); 216 break; 217 case 0x8: 218 printf("128us"); 219 break; 220 default: 221 printf("unknown [%02x]", refresh); 222 break; 223 } 224 225 printf("\n"); 226 #if 0 227 /* 228 * No point in reporting this as it may get changed when devices are 229 * attached 230 */ 231 tmp = bus_space_read_1(iot, ioh, IOMD_IOTCR); 232 printf("%s: I/O timings: combo %c, NPCCS1/2 %c", self->dv_xname, 233 'A' + ((tmp >>2) & 3), 'A' + (tmp & 3)); 234 tmp = bus_space_read_1(iot, ioh, IOMD_ECTCR); 235 printf(", EASI "); 236 for (i = 0; i < 8; i++, tmp >>= 1) 237 printf("%c", 'A' + ((tmp & 1) << 2)); 238 tmp = bus_space_read_1(iot, ioh, IOMD_DMATCR); 239 printf(", DMA "); 240 for (i = 0; i < 4; i++, tmp >>= 2) 241 printf("%c", 'A' + (tmp & 3)); 242 printf("\n"); 243 #endif 244 245 /* Set up the external DMA channels */ 246 /* XXX - this should be machine dependant not IOMD dependant */ 247 switch (sc->sc_id) { 248 case ARM7500_IOC_ID: 249 case ARM7500FE_IOC_ID: 250 break; 251 case RPC600_IOMD_ID: 252 /* DMA channels 2 & 3 are external */ 253 bus_space_write_1(iot, ioh, IOMD_DMAEXT, 0x0c); 254 break; 255 } 256 257 /* Configure the child devices */ 258 259 /* Attach clock device */ 260 261 ia.ia_clk.ca_name = "clk"; 262 ia.ia_clk.ca_iot = iot; 263 ia.ia_clk.ca_ioh = ioh; 264 config_found(self, &ia, iomdprint); 265 266 /* Attach kbd device when configured */ 267 if (bus_space_subregion(iot, ioh, IOMD_KBDDAT, 8, &ia.ia_kbd.ka_ioh)) 268 panic("%s: Cannot map kbd registers", self->dv_xname); 269 ia.ia_kbd.ka_name = "kbd"; 270 ia.ia_kbd.ka_iot = iot; 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, 290 &ia.ia_opms.pa_ioh)) 291 panic("%s: Cannot map opms registers", self->dv_xname); 292 ia.ia_opms.pa_name = "opms"; 293 ia.ia_opms.pa_iot = iot; 294 ia.ia_opms.pa_irq = IRQ_MSDRX; 295 config_found(self, &ia, iomdprint); 296 break; 297 case RPC600_IOMD_ID: 298 /* Attach (ws)qms device */ 299 300 if (bus_space_subregion(iot, ioh, IOMD_MOUSEX, 8, 301 &ia.ia_qms.qa_ioh)) 302 panic("%s: Cannot map qms registers", self->dv_xname); 303 304 if (bus_space_map(iot, IO_MOUSE_BUTTONS, 4, 0, &ia.ia_qms.qa_ioh_but)) 305 panic("%s: Cannot map registers", self->dv_xname); 306 ia.ia_qms.qa_name = "qms"; 307 ia.ia_qms.qa_iot = iot; 308 ia.ia_qms.qa_irq = IRQ_VSYNC; 309 config_found(self, &ia, iomdprint); 310 break; 311 } 312 } 313 314 /* End of iomd.c */ 315