1 /* $NetBSD: iomd.c,v 1.21 2012/10/10 22:00:22 skrll 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 1.21 2012/10/10 22:00:22 skrll 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 <sys/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 device_t 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(device_t parent, cfdata_t cf, void *aux); 84 static void iomdattach(device_t parent, device_t self, void *aux); 85 static int iomdprint(void *aux, const char *iomdbus); 86 87 CFATTACH_DECL_NEW(iomd, sizeof(struct iomd_softc), 88 iomdmatch, iomdattach, NULL, NULL); 89 90 extern struct bus_space iomd_bs_tag; 91 92 int iomd_found; 93 uint32_t iomd_base = IOMD_BASE; 94 95 /* following flag is used in iomd_irq.s ... has to be cleaned up one day ! */ 96 uint32_t arm7500_ioc_found = 0; 97 98 99 /* Declare prototypes */ 100 101 /* 102 * int iomdprint(void *aux, const char *name) 103 * 104 * print configuration info for children 105 */ 106 107 static int 108 iomdprint(void *aux, const char *name) 109 { 110 /* union iomd_attach_args *ia = aux;*/ 111 112 return QUIET; 113 } 114 115 /* 116 * int iomdmatch(device_t parent, cfdata_t cf, void *aux) 117 * 118 * Just return ok for this if it is device 0 119 */ 120 121 static int 122 iomdmatch(device_t parent, cfdata_t cf, void *aux) 123 { 124 125 if (iomd_found) 126 return 0; 127 return 1; 128 } 129 130 131 /* 132 * void iomdattach(device_t parent, device_t dev, void *aux) 133 * 134 * Map the IOMD and identify it. 135 * Then configure the child devices based on the IOMD ID. 136 */ 137 138 static void 139 iomdattach(device_t parent, device_t self, void *aux) 140 { 141 struct iomd_softc *sc = device_private(self); 142 /* struct mainbus_attach_args *mb = aux;*/ 143 int refresh; 144 #if 0 145 int i, tmp; 146 #endif 147 union iomd_attach_args ia; 148 bus_space_tag_t iot; 149 bus_space_handle_t ioh; 150 151 /* There can be only 1 IOMD. */ 152 iomd_found = 1; 153 154 sc->sc_dev = self; 155 iot = sc->sc_iot = &iomd_bs_tag; 156 157 /* Map the IOMD */ 158 if (bus_space_map(iot, (int) iomd_base, IOMD_SIZE, 0, &ioh)) 159 panic("%s: Cannot map registers", device_xname(self)); 160 161 sc->sc_ioh = ioh; 162 163 /* Get the ID */ 164 sc->sc_id = bus_space_read_1(iot, ioh, IOMD_ID0) 165 | (bus_space_read_1(iot, ioh, IOMD_ID1) << 8); 166 aprint_normal(": "); 167 168 /* Identify it and get the DRAM refresh rate */ 169 switch (sc->sc_id) { 170 case ARM7500_IOC_ID: 171 aprint_normal("ARM7500 IOMD "); 172 refresh = bus_space_read_1(iot, ioh, IOMD_REFCR) & 0x0f; 173 arm7500_ioc_found = 1; 174 break; 175 case ARM7500FE_IOC_ID: 176 aprint_normal("ARM7500FE IOMD "); 177 refresh = bus_space_read_1(iot, ioh, IOMD_REFCR) & 0x0f; 178 arm7500_ioc_found = 1; 179 break; 180 case RPC600_IOMD_ID: 181 aprint_normal("IOMD20 "); 182 refresh = bus_space_read_1(iot, ioh, IOMD_VREFCR) & 0x09; 183 arm7500_ioc_found = 0; 184 break; 185 default: 186 aprint_normal("Unknown IOMD ID=%04x ", sc->sc_id); 187 refresh = -1; 188 arm7500_ioc_found = 0; /* just in case */ 189 break; 190 } 191 aprint_normal("version %d\n", bus_space_read_1(iot, ioh, IOMD_VERSION)); 192 193 /* Report the DRAM refresh rate */ 194 aprint_normal("%s: ", device_xname(self)); 195 aprint_normal("DRAM refresh="); 196 switch (refresh) { 197 case 0x0: 198 aprint_normal("off"); 199 break; 200 case 0x1: 201 aprint_normal("16us"); 202 break; 203 case 0x2: 204 aprint_normal("32us"); 205 break; 206 case 0x4: 207 aprint_normal("64us"); 208 break; 209 case 0x8: 210 aprint_normal("128us"); 211 break; 212 default: 213 aprint_normal("unknown [%02x]", refresh); 214 break; 215 } 216 217 aprint_normal("\n"); 218 #if 0 219 /* 220 * No point in reporting this as it may get changed when devices are 221 * attached 222 */ 223 tmp = bus_space_read_1(iot, ioh, IOMD_IOTCR); 224 aprint_normal("%s: I/O timings: combo %c, NPCCS1/2 %c", device_xname(self), 225 'A' + ((tmp >>2) & 3), 'A' + (tmp & 3)); 226 tmp = bus_space_read_1(iot, ioh, IOMD_ECTCR); 227 aprint_normal(", EASI "); 228 for (i = 0; i < 8; i++, tmp >>= 1) 229 aprint_normal("%c", 'A' + ((tmp & 1) << 2)); 230 tmp = bus_space_read_1(iot, ioh, IOMD_DMATCR); 231 aprint_normal(", DMA "); 232 for (i = 0; i < 4; i++, tmp >>= 2) 233 aprint_normal("%c", 'A' + (tmp & 3)); 234 aprint_normal("\n"); 235 #endif 236 237 /* Set up the external DMA channels */ 238 /* XXX - this should be machine dependent not IOMD dependent */ 239 switch (sc->sc_id) { 240 case ARM7500_IOC_ID: 241 case ARM7500FE_IOC_ID: 242 break; 243 case RPC600_IOMD_ID: 244 /* DMA channels 2 & 3 are external */ 245 bus_space_write_1(iot, ioh, IOMD_DMAEXT, 0x0c); 246 break; 247 } 248 249 /* Configure the child devices */ 250 251 /* Attach clock device */ 252 253 ia.ia_clk.ca_name = "clk"; 254 ia.ia_clk.ca_iot = iot; 255 ia.ia_clk.ca_ioh = ioh; 256 config_found(self, &ia, iomdprint); 257 258 /* Attach kbd device when configured */ 259 if (bus_space_subregion(iot, ioh, IOMD_KBDDAT, 8, &ia.ia_kbd.ka_ioh)) 260 panic("%s: Cannot map kbd registers", device_xname(self)); 261 ia.ia_kbd.ka_name = "kbd"; 262 ia.ia_kbd.ka_iot = iot; 263 ia.ia_kbd.ka_rxirq = IRQ_KBDRX; 264 ia.ia_kbd.ka_txirq = IRQ_KBDTX; 265 config_found(self, &ia, iomdprint); 266 267 /* Attach iic device */ 268 269 if (bus_space_subregion(iot, ioh, IOMD_IOCR, 4, &ia.ia_iic.ia_ioh)) 270 panic("%s: Cannot map iic registers", device_xname(self)); 271 ia.ia_iic.ia_name = "iic"; 272 ia.ia_iic.ia_iot = iot; 273 ia.ia_iic.ia_irq = -1; 274 config_found(self, &ia, iomdprint); 275 276 switch (sc->sc_id) { 277 case ARM7500_IOC_ID: 278 case ARM7500FE_IOC_ID: 279 /* Attach opms device */ 280 281 if (bus_space_subregion(iot, ioh, IOMD_MSDATA, 8, 282 &ia.ia_opms.pa_ioh)) 283 panic("%s: Cannot map opms registers", device_xname(self)); 284 ia.ia_opms.pa_name = "opms"; 285 ia.ia_opms.pa_iot = iot; 286 ia.ia_opms.pa_irq = IRQ_MSDRX; 287 config_found(self, &ia, iomdprint); 288 break; 289 case RPC600_IOMD_ID: 290 /* Attach (ws)qms device */ 291 292 if (bus_space_subregion(iot, ioh, IOMD_MOUSEX, 8, 293 &ia.ia_qms.qa_ioh)) 294 panic("%s: Cannot map qms registers", device_xname(self)); 295 296 if (bus_space_map(iot, IO_MOUSE_BUTTONS, 4, 0, &ia.ia_qms.qa_ioh_but)) 297 panic("%s: Cannot map registers", device_xname(self)); 298 ia.ia_qms.qa_name = "qms"; 299 ia.ia_qms.qa_iot = iot; 300 ia.ia_qms.qa_irq = IRQ_VSYNC; 301 config_found(self, &ia, iomdprint); 302 break; 303 } 304 } 305 306 /* End of iomd.c */ 307