mpcsa_machdep.c revision 1.2
1 /* $Id: mpcsa_machdep.c,v 1.2 2008/07/03 01:15:39 matt Exp $ */ 2 /* $NetBSD: mpcsa_machdep.c,v 1.2 2008/07/03 01:15:39 matt Exp $ */ 3 4 /* 5 * Copyright (c) 2007 Embedtronics Oy 6 * Based on tsarm_machdep.c 7 * 8 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. 9 * All rights reserved. 10 * 11 * Based on code written by Jason R. Thorpe and Steve C. Woodford for 12 * Wasabi Systems, Inc. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed for the NetBSD Project by 25 * Wasabi Systems, Inc. 26 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 27 * or promote products derived from this software without specific prior 28 * written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 32 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 33 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 34 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 38 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 40 * POSSIBILITY OF SUCH DAMAGE. 41 */ 42 43 /* 44 * Copyright (c) 1997,1998 Mark Brinicombe. 45 * Copyright (c) 1997,1998 Causality Limited. 46 * All rights reserved. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. All advertising materials mentioning features or use of this software 57 * must display the following acknowledgement: 58 * This product includes software developed by Mark Brinicombe 59 * for the NetBSD Project. 60 * 4. The name of the company nor the name of the author may be used to 61 * endorse or promote products derived from this software without specific 62 * prior written permission. 63 * 64 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 65 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 66 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 67 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 68 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 69 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 70 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 71 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 72 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 73 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 74 * SUCH DAMAGE. 75 * 76 * Machine dependant functions for kernel setup for Iyonix. 77 */ 78 79 #include <sys/cdefs.h> 80 __KERNEL_RCSID(0, "$NetBSD: mpcsa_machdep.c,v 1.2 2008/07/03 01:15:39 matt Exp $"); 81 82 #include "opt_ddb.h" 83 #include "opt_kgdb.h" 84 #include "opt_pmap_debug.h" 85 86 #include <sys/param.h> 87 #include <sys/device.h> 88 #include <sys/systm.h> 89 #include <sys/kernel.h> 90 #include <sys/exec.h> 91 #include <sys/proc.h> 92 #include <sys/msgbuf.h> 93 #include <sys/reboot.h> 94 #include <sys/termios.h> 95 #include <sys/ksyms.h> 96 97 #include <uvm/uvm_extern.h> 98 99 #include <dev/cons.h> 100 101 #include <machine/db_machdep.h> 102 #include <ddb/db_sym.h> 103 #include <ddb/db_extern.h> 104 105 #define DRAM_BLOCKS 1 106 #include <machine/bootconfig.h> 107 #include <machine/bus.h> 108 #include <machine/cpu.h> 109 #include <machine/frame.h> 110 #include <arm/undefined.h> 111 112 #include <arm/arm32/machdep.h> 113 114 #include <arm/at91/at91reg.h> 115 #include <arm/at91/at91var.h> 116 117 #include <dev/ic/comreg.h> 118 #include <dev/ic/comvar.h> 119 120 #include <machine/autoconf.h> 121 122 #include "seeprom.h" 123 #if NSEEPROM > 0 124 #include <net/if.h> 125 #include <net/if_ether.h> 126 #include <dev/i2c/i2cvar.h> 127 #include <dev/i2c/at24cxxvar.h> 128 #endif 129 #include <arm/at91/at91twivar.h> 130 131 #if TODO 132 #include "epcom.h" 133 #if NEPCOM > 0 134 #include <arm/ep93xx/epcomvar.h> 135 #endif 136 137 #include "isa.h" 138 #if NISA > 0 139 #include <dev/isa/isareg.h> 140 #include <dev/isa/isavar.h> 141 #endif 142 143 #include <machine/isa_machdep.h> 144 145 #include <evbarm/mpcsa/mpcsareg.h> 146 #endif // TODO 147 148 #include <arm/at91/at91rm9200reg.h> 149 #include <arm/at91/at91rm9200busvar.h> 150 151 #include "opt_ipkdb.h" 152 #include "ksyms.h" 153 154 #include <arm/at91/at91busvar.h> 155 #include <arm/at91/at91pdcreg.h> 156 #include <arm/at91/at91dbgureg.h> 157 #include <arm/at91/at91reg.h> 158 #include <arm/at91/at91streg.h> 159 160 /* 161 * Address to call from cpu_reset() to reset the machine. 162 * This is machine architecture dependant as it varies depending 163 * on where the ROM appears when you turn the MMU off. 164 */ 165 166 u_int cpu_reset_address = 0x00000000; 167 168 169 /* boot configuration: */ 170 BootConfig bootconfig; /* Boot config storage */ 171 char *boot_args = NULL; 172 char *boot_file = NULL; 173 174 /* hmmm */ 175 static struct arm32_dma_range mpcsa_dma_ranges[4]; 176 static struct at91bus_machdep mpcsabus; 177 static at91bus_tag_t old_at91bus_tag; 178 179 /* Prototypes */ 180 static void mpcsa_device_register(device_t dev, void *aux); 181 static void mpcsabus_init(struct at91bus_clocks *); 182 static void mpcsabus_peripheral_clock(int pid, int enable); 183 static uint32_t mpcsabus_gpio_mask(int pid); 184 185 186 /* 187 * void cpu_reboot(int howto, char *bootstr) 188 * 189 * Reboots the system 190 * 191 * Deal with any syncing, unmounting, dumping and shutdown hooks, 192 * then reset the CPU. 193 */ 194 void 195 cpu_reboot(int howto, char *bootstr) 196 { 197 198 /* 199 * If we are still cold then hit the air brakes 200 * and crash to earth fast 201 */ 202 if (cold) { 203 doshutdownhooks(); 204 printf("\r\n"); 205 printf("The operating system has halted.\r\n"); 206 printf("Please press any key to reboot.\r\n"); 207 cngetc(); 208 printf("\r\nrebooting...\r\n"); 209 goto reset; 210 } 211 212 /* Disable console buffering */ 213 214 /* 215 * If RB_NOSYNC was not specified sync the discs. 216 * Note: Unless cold is set to 1 here, syslogd will die during the 217 * unmount. It looks like syslogd is getting woken up only to find 218 * that it cannot page part of the binary in as the filesystem has 219 * been unmounted. 220 */ 221 if (!(howto & RB_NOSYNC)) 222 bootsync(); 223 224 /* Say NO to interrupts */ 225 splhigh(); 226 227 /* Do a dump if requested. */ 228 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 229 dumpsys(); 230 231 /* Run any shutdown hooks */ 232 doshutdownhooks(); 233 234 /* Make sure IRQ's are disabled */ 235 IRQdisable; 236 237 if (howto & RB_HALT) { 238 printf("\r\n"); 239 printf("The operating system has halted.\r\n"); 240 printf("Please press any key to reboot.\r\n"); 241 cngetc(); 242 } 243 244 printf("\r\nrebooting...\r\n"); 245 reset: 246 /* 247 * Make really really sure that all interrupts are disabled, 248 * and poke the Internal Bus and Peripheral Bus reset lines. 249 */ 250 (void) disable_interrupts(I32_bit|F32_bit); 251 STREG(ST_WDMR) = ST_WDMR_EXTEN | ST_WDMR_RSTEN | 1; 252 STREG(ST_CR) = ST_CR_WDRST; 253 for (;;); 254 } 255 256 /* 257 * u_int initarm(...) 258 * 259 * Initial entry point on startup. This gets called before main() is 260 * entered. 261 * It should be responsible for setting up everything that must be 262 * in place when main is called. 263 * This includes 264 * Taking a copy of the boot configuration structure. 265 * Initialising the physical console so characters can be printed. 266 * Setting up page tables for the kernel 267 * Initialising interrupt controllers to a sane default state 268 */ 269 u_int 270 initarm(void *arg) 271 { 272 u_int ret; 273 /* 274 * basic AT91 initialization: 275 */ 276 if (at91bus_init()) 277 panic("%s: at91bus_init() failed", __FUNCTION__); 278 279 if (AT91_CHIP_ID() == AT91RM9200_CHIP_ID) { 280 memcpy(&mpcsabus, at91bus_tag, sizeof(mpcsabus)); 281 mpcsabus.init = mpcsabus_init; 282 mpcsabus.peripheral_clock = mpcsabus_peripheral_clock; 283 mpcsabus.gpio_mask = mpcsabus_gpio_mask; 284 old_at91bus_tag = at91bus_tag; 285 at91bus_tag = &mpcsabus; 286 } 287 288 /* Fake bootconfig structure for the benefit of pmap.c */ 289 /* XXX must make the memory description h/w independent */ 290 bootconfig.dramblocks = 1; 291 bootconfig.dram[0].address = 0x20000000UL; 292 bootconfig.dram[0].pages = 0x04000000UL / PAGE_SIZE; 293 ret = at91bus_setup(&bootconfig); 294 295 if (AT91_CHIP_ID() != AT91RM9200_CHIP_ID) 296 panic("%s: processor is not AT91RM9200", __FUNCTION__); 297 298 /* we've a specific device_register routine */ 299 evbarm_device_register = mpcsa_device_register; 300 301 /* We return the new stack pointer address */ 302 return ret; 303 } 304 305 306 bus_dma_tag_t 307 at91_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 308 { 309 int i; 310 struct arm32_bus_dma_tag *dmat; 311 312 for (i = 0; i < bootconfig.dramblocks; i++) { 313 mpcsa_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 314 mpcsa_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 315 mpcsa_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 316 PAGE_SIZE; 317 } 318 319 dmat = dma_tag_template; 320 321 dmat->_ranges = mpcsa_dma_ranges; 322 dmat->_nranges = bootconfig.dramblocks; 323 324 return dmat; 325 } 326 327 void mpcsabus_init(struct at91bus_clocks *clocks) 328 { 329 (*old_at91bus_tag->init)(clocks); 330 } 331 332 uint32_t mpcsabus_gpio_mask(int pid) 333 { 334 switch (pid) { 335 case PID_PIOA: return ~0x00000300U; 336 case PID_PIOB: return ~0x0000783FU; 337 case PID_PIOC: return ~0x00000000U; 338 case PID_PIOD: return ~0x0003F000U; 339 default: return ~0x00000000U; 340 } 341 } 342 343 void mpcsabus_peripheral_clock(int pid, int enable) 344 { 345 switch (pid) { 346 case PID_TWI: 347 if (enable) { 348 PIOA_WRITE(PIO_ASR, 0x06000000); // assign to peripheral A 349 PIOA_WRITE(PIO_PDR, 0x06000000); // assign to peripherals 350 PIOA_WRITE(PIO_MDER, 0x06000000); // I2C pins in open-drain mode 351 } 352 break; 353 354 case PID_SPI: 355 if (enable) { 356 PIOA_WRITE(PIO_ASR, 0x00000007); // assign to peripheral A 357 PIOA_WRITE(PIO_PDR, 0x00000007); // assign to peripherals 358 } 359 break; 360 } 361 (*old_at91bus_tag->peripheral_clock)(pid, enable); 362 } 363 364 365 static void mpcsa_device_register(device_t dev, void *aux) 366 { 367 static uint8_t eth_addr[ETHER_ADDR_LEN]; 368 369 if (device_is_a(dev, "at91emac")) { 370 cfdriver_t cd = config_cfdriver_lookup("at91twi"); 371 device_t twi_dev = 0; 372 i2c_tag_t i2c = 0; 373 if (cd && (twi_dev = device_lookup(cd, 0)) != NULL) { 374 struct at91twi_softc *sc = (struct at91twi_softc *)twi_dev; 375 i2c = &sc->sc_i2c; 376 } 377 if (i2c && seeprom_bootstrap_read(i2c, 0x50, 0x00, 4096, 378 eth_addr, ETHER_ADDR_LEN) == 0) { 379 prop_data_t pd = prop_data_create_data_nocopy( 380 eth_addr, ETHER_ADDR_LEN); 381 KASSERT(pd != NULL); 382 if (prop_dictionary_set(device_properties(dev), 383 "mac-addr", pd) == FALSE) { 384 printf("WARNING: unable to set mac-addr property " 385 "for %s\n", dev->dv_xname); 386 } 387 } else { 388 printf("%s: WARNING: unable to read MAC address from SEEPROM\n", 389 dev->dv_xname); 390 } 391 } 392 } 393 394
Indexes created Tue Sep 30 17:09:57 GMT 2025