mpcsa_machdep.c revision 1.12
1 /* $Id: mpcsa_machdep.c,v 1.12 2020/04/18 10:55:45 skrll Exp $ */ 2 /* $NetBSD: mpcsa_machdep.c,v 1.12 2020/04/18 10:55:45 skrll 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 dependent functions for kernel setup for Iyonix. 77 */ 78 79 #include <sys/cdefs.h> 80 __KERNEL_RCSID(0, "$NetBSD: mpcsa_machdep.c,v 1.12 2020/04/18 10:55:45 skrll 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 #include <sys/bus.h> 97 #include <sys/cpu.h> 98 99 #include <uvm/uvm_extern.h> 100 101 #include <dev/cons.h> 102 103 #include <dev/ic/comreg.h> 104 #include <dev/ic/comvar.h> 105 106 #include <machine/db_machdep.h> 107 #include <ddb/db_sym.h> 108 #include <ddb/db_extern.h> 109 110 #include <arm/locore.h> 111 #include <arm/undefined.h> 112 113 #include <arm/arm32/machdep.h> 114 115 #include <arm/at91/at91reg.h> 116 #include <arm/at91/at91var.h> 117 118 #define DRAM_BLOCKS 1 119 #include <machine/bootconfig.h> 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 "ksyms.h" 152 153 #include <arm/at91/at91busvar.h> 154 #include <arm/at91/at91pdcreg.h> 155 #include <arm/at91/at91dbgureg.h> 156 #include <arm/at91/at91reg.h> 157 #include <arm/at91/at91streg.h> 158 159 /* boot configuration: */ 160 BootConfig bootconfig; /* Boot config storage */ 161 char *boot_args = NULL; 162 char *boot_file = NULL; 163 164 /* hmmm */ 165 static struct arm32_dma_range mpcsa_dma_ranges[4]; 166 static struct at91bus_machdep mpcsabus; 167 static at91bus_tag_t old_at91bus_tag; 168 169 /* Prototypes */ 170 static void mpcsa_device_register(device_t dev, void *aux); 171 static void mpcsabus_init(struct at91bus_clocks *); 172 static void mpcsabus_peripheral_clock(int pid, int enable); 173 static uint32_t mpcsabus_gpio_mask(int pid); 174 175 176 /* 177 * void cpu_reboot(int howto, char *bootstr) 178 * 179 * Reboots the system 180 * 181 * Deal with any syncing, unmounting, dumping and shutdown hooks, 182 * then reset the CPU. 183 */ 184 void 185 cpu_reboot(int howto, char *bootstr) 186 { 187 188 /* 189 * If we are still cold then hit the air brakes 190 * and crash to earth fast 191 */ 192 if (cold) { 193 doshutdownhooks(); 194 pmf_system_shutdown(boothowto); 195 printf("\r\n"); 196 printf("The operating system has halted.\r\n"); 197 printf("Please press any key to reboot.\r\n"); 198 cngetc(); 199 printf("\r\nrebooting...\r\n"); 200 goto reset; 201 } 202 203 /* Disable console buffering */ 204 205 /* 206 * If RB_NOSYNC was not specified sync the discs. 207 * Note: Unless cold is set to 1 here, syslogd will die during the 208 * unmount. It looks like syslogd is getting woken up only to find 209 * that it cannot page part of the binary in as the filesystem has 210 * been unmounted. 211 */ 212 if (!(howto & RB_NOSYNC)) 213 bootsync(); 214 215 /* Say NO to interrupts */ 216 splhigh(); 217 218 /* Do a dump if requested. */ 219 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 220 dumpsys(); 221 222 /* Run any shutdown hooks */ 223 doshutdownhooks(); 224 225 pmf_system_shutdown(boothowto); 226 227 /* Make sure IRQ's are disabled */ 228 IRQdisable; 229 230 if (howto & RB_HALT) { 231 printf("\r\n"); 232 printf("The operating system has halted.\r\n"); 233 printf("Please press any key to reboot.\r\n"); 234 cngetc(); 235 } 236 237 printf("\r\nrebooting...\r\n"); 238 reset: 239 /* 240 * Make really really sure that all interrupts are disabled, 241 * and poke the Internal Bus and Peripheral Bus reset lines. 242 */ 243 (void) disable_interrupts(I32_bit|F32_bit); 244 STREG(ST_WDMR) = ST_WDMR_EXTEN | ST_WDMR_RSTEN | 1; 245 STREG(ST_CR) = ST_CR_WDRST; 246 for (;;); 247 } 248 249 /* 250 * vaddr_t initarm(...) 251 * 252 * Initial entry point on startup. This gets called before main() is 253 * entered. 254 * It should be responsible for setting up everything that must be 255 * in place when main is called. 256 * This includes 257 * Taking a copy of the boot configuration structure. 258 * Initialising the physical console so characters can be printed. 259 * Setting up page tables for the kernel 260 * Initialising interrupt controllers to a sane default state 261 */ 262 vaddr_t 263 initarm(void *arg) 264 { 265 vaddr_t sp; 266 /* 267 * basic AT91 initialization: 268 */ 269 if (at91bus_init()) 270 panic("%s: at91bus_init() failed", __FUNCTION__); 271 272 if (AT91_CHIP_ID() == AT91RM9200_CHIP_ID) { 273 memcpy(&mpcsabus, at91bus_tag, sizeof(mpcsabus)); 274 mpcsabus.init = mpcsabus_init; 275 mpcsabus.peripheral_clock = mpcsabus_peripheral_clock; 276 mpcsabus.gpio_mask = mpcsabus_gpio_mask; 277 old_at91bus_tag = at91bus_tag; 278 at91bus_tag = &mpcsabus; 279 } 280 281 /* Fake bootconfig structure for the benefit of pmap.c */ 282 /* XXX must make the memory description h/w independent */ 283 bootconfig.dramblocks = 1; 284 bootconfig.dram[0].address = 0x20000000UL; 285 bootconfig.dram[0].pages = 0x04000000UL / PAGE_SIZE; 286 sp = at91bus_setup(&bootconfig); 287 288 if (AT91_CHIP_ID() != AT91RM9200_CHIP_ID) 289 panic("%s: processor is not AT91RM9200", __FUNCTION__); 290 291 /* we've a specific device_register routine */ 292 evbarm_device_register = mpcsa_device_register; 293 294 /* We return the new stack pointer address */ 295 return sp; 296 } 297 298 299 bus_dma_tag_t 300 at91_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 301 { 302 int i; 303 struct arm32_bus_dma_tag *dmat; 304 305 for (i = 0; i < bootconfig.dramblocks; i++) { 306 mpcsa_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 307 mpcsa_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 308 mpcsa_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 309 PAGE_SIZE; 310 } 311 312 dmat = dma_tag_template; 313 314 dmat->_ranges = mpcsa_dma_ranges; 315 dmat->_nranges = bootconfig.dramblocks; 316 317 return dmat; 318 } 319 320 void mpcsabus_init(struct at91bus_clocks *clocks) 321 { 322 (*old_at91bus_tag->init)(clocks); 323 } 324 325 uint32_t mpcsabus_gpio_mask(int pid) 326 { 327 switch (pid) { 328 case PID_PIOA: return ~0x00000300U; 329 case PID_PIOB: return ~0x0000783FU; 330 case PID_PIOC: return ~0x00000000U; 331 case PID_PIOD: return ~0x0003F000U; 332 default: return ~0x00000000U; 333 } 334 } 335 336 void mpcsabus_peripheral_clock(int pid, int enable) 337 { 338 switch (pid) { 339 case PID_TWI: 340 if (enable) { 341 PIOA_WRITE(PIO_ASR, 0x06000000); // assign to peripheral A 342 PIOA_WRITE(PIO_PDR, 0x06000000); // assign to peripherals 343 PIOA_WRITE(PIO_MDER, 0x06000000); // I2C pins in open-drain mode 344 } 345 break; 346 347 case PID_SPI: 348 if (enable) { 349 PIOA_WRITE(PIO_ASR, 0x00000007); // assign to peripheral A 350 PIOA_WRITE(PIO_PDR, 0x00000007); // assign to peripherals 351 } 352 break; 353 } 354 (*old_at91bus_tag->peripheral_clock)(pid, enable); 355 } 356 357 358 static void mpcsa_device_register(device_t dev, void *aux) 359 { 360 static uint8_t eth_addr[ETHER_ADDR_LEN]; 361 362 if (device_is_a(dev, "at91emac")) { 363 cfdriver_t cd = config_cfdriver_lookup("at91twi"); 364 device_t twi_dev = 0; 365 i2c_tag_t i2c = 0; 366 if (cd && (twi_dev = device_lookup(cd, 0)) != NULL) { 367 struct at91twi_softc *sc = device_private(twi_dev); 368 i2c = &sc->sc_i2c; 369 } 370 if (i2c && seeprom_bootstrap_read(i2c, 0x50, 0x00, 4096, 371 eth_addr, ETHER_ADDR_LEN) == 0) { 372 prop_data_t pd = prop_data_create_data_nocopy( 373 eth_addr, ETHER_ADDR_LEN); 374 KASSERT(pd != NULL); 375 if (prop_dictionary_set(device_properties(dev), 376 "mac-address", pd) == FALSE) { 377 printf("WARNING: unable to set mac-addr property " 378 "for %s\n", device_xname(dev)); 379 } 380 } else { 381 printf("%s: WARNING: unable to read MAC address from SEEPROM\n", 382 device_xname(dev)); 383 } 384 } 385 } 386
Indexes created Tue Sep 30 11:09:46 GMT 2025