1 /* $NetBSD: acpi_platform.c,v 1.16 2019/08/02 19:49:17 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2018 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jared McNeill <jmcneill@invisible.ca>. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include "com.h" 33 #include "plcom.h" 34 #include "wsdisplay.h" 35 #include "genfb.h" 36 #include "opt_efi.h" 37 #include "opt_multiprocessor.h" 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: acpi_platform.c,v 1.16 2019/08/02 19:49:17 jmcneill Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/bus.h> 44 #include <sys/cpu.h> 45 #include <sys/device.h> 46 #include <sys/termios.h> 47 48 #include <dev/fdt/fdtvar.h> 49 #include <arm/fdt/arm_fdtvar.h> 50 51 #include <uvm/uvm_extern.h> 52 53 #include <machine/bootconfig.h> 54 #include <arm/cpufunc.h> 55 #include <arm/locore.h> 56 57 #include <arm/cortex/gtmr_var.h> 58 59 #include <arm/arm/psci.h> 60 #include <arm/fdt/psci_fdtvar.h> 61 62 #include <evbarm/fdt/platform.h> 63 64 #include <evbarm/dev/plcomreg.h> 65 #include <evbarm/dev/plcomvar.h> 66 #include <dev/ic/ns16550reg.h> 67 #include <dev/ic/comreg.h> 68 #include <dev/ic/comvar.h> 69 70 #if NCOM > 0 71 #include <dev/pci/pcireg.h> 72 #include <dev/pci/pcivar.h> 73 #include <dev/pci/pucvar.h> 74 #endif 75 76 #if NWSDISPLAY > 0 77 #include <dev/wscons/wsconsio.h> 78 #include <dev/wscons/wsdisplayvar.h> 79 #include <dev/rasops/rasops.h> 80 #include <dev/wsfont/wsfont.h> 81 #include <dev/wscons/wsdisplay_vconsvar.h> 82 #endif 83 84 #ifdef EFI_RUNTIME 85 #include <arm/arm/efi_runtime.h> 86 #endif 87 88 #include <dev/acpi/acpireg.h> 89 #include <dev/acpi/acpivar.h> 90 #include <arm/acpi/acpi_table.h> 91 92 #include <libfdt.h> 93 94 #define SPCR_BAUD_UNKNOWN 0 95 #define SPCR_BAUD_9600 3 96 #define SPCR_BAUD_19200 4 97 #define SPCR_BAUD_57600 6 98 #define SPCR_BAUD_115200 7 99 100 extern struct bus_space arm_generic_bs_tag; 101 extern struct bus_space arm_generic_a4x_bs_tag; 102 103 #if NPLCOM > 0 104 static struct plcom_instance plcom_console; 105 #endif 106 107 struct arm32_bus_dma_tag acpi_coherent_dma_tag; 108 static struct arm32_dma_range acpi_coherent_ranges[] = { 109 [0] = { 110 .dr_sysbase = 0, 111 .dr_busbase = 0, 112 .dr_len = UINTPTR_MAX, 113 .dr_flags = _BUS_DMAMAP_COHERENT, 114 } 115 }; 116 117 static const struct pmap_devmap * 118 acpi_platform_devmap(void) 119 { 120 static const struct pmap_devmap devmap[] = { 121 DEVMAP_ENTRY_END 122 }; 123 124 return devmap; 125 } 126 127 static void 128 acpi_platform_bootstrap(void) 129 { 130 extern struct arm32_bus_dma_tag arm_generic_dma_tag; 131 132 acpi_coherent_dma_tag = arm_generic_dma_tag; 133 acpi_coherent_dma_tag._ranges = acpi_coherent_ranges; 134 acpi_coherent_dma_tag._nranges = __arraycount(acpi_coherent_ranges); 135 } 136 137 #if NWSDISPLAY > 0 && NGENFB > 0 138 static struct wsscreen_descr acpi_platform_stdscreen = { 139 .name = "std", 140 .ncols = 0, 141 .nrows = 0, 142 .textops = NULL, 143 .fontwidth = 0, 144 .fontheight = 0, 145 .capabilities = 0, 146 .modecookie = NULL 147 }; 148 149 static struct vcons_screen acpi_platform_screen; 150 151 static int 152 acpi_platform_find_simplefb(void) 153 { 154 static const char * simplefb_compatible[] = { "simple-framebuffer", NULL }; 155 int chosen_phandle, child; 156 157 chosen_phandle = OF_finddevice("/chosen"); 158 if (chosen_phandle == -1) 159 return -1; 160 161 for (child = OF_child(chosen_phandle); child; child = OF_peer(child)) { 162 if (!fdtbus_status_okay(child)) 163 continue; 164 if (!of_match_compatible(child, simplefb_compatible)) 165 continue; 166 167 return child; 168 } 169 170 return -1; 171 } 172 173 static void 174 acpi_platform_wsdisplay_preattach(void) 175 { 176 struct rasops_info *ri = &acpi_platform_screen.scr_ri; 177 bus_space_tag_t bst = &arm_generic_bs_tag; 178 bus_space_handle_t bsh; 179 uint32_t width, height, stride; 180 const char *format; 181 bus_addr_t addr; 182 bus_size_t size; 183 uint16_t depth; 184 long defattr; 185 186 memset(&acpi_platform_screen, 0, sizeof(acpi_platform_screen)); 187 188 const int phandle = acpi_platform_find_simplefb(); 189 if (phandle == -1) 190 return; 191 192 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0 || size == 0) 193 return; 194 195 if (of_getprop_uint32(phandle, "width", &width) != 0 || 196 of_getprop_uint32(phandle, "height", &height) != 0 || 197 of_getprop_uint32(phandle, "stride", &stride) != 0 || 198 (format = fdtbus_get_string(phandle, "format")) == NULL) 199 return; 200 201 if (strcmp(format, "a8b8g8r8") == 0 || 202 strcmp(format, "x8r8g8b8") == 0) { 203 depth = 32; 204 } else if (strcmp(format, "r5g6b5") == 0) { 205 depth = 16; 206 } else { 207 return; 208 } 209 210 if (bus_space_map(bst, addr, size, 211 BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE, &bsh) != 0) 212 return; 213 214 wsfont_init(); 215 216 ri->ri_width = width; 217 ri->ri_height = height; 218 ri->ri_depth = depth; 219 ri->ri_stride = stride; 220 ri->ri_bits = bus_space_vaddr(bst, bsh); 221 ri->ri_flg = RI_CENTER | RI_FULLCLEAR | RI_CLEAR; 222 rasops_init(ri, ri->ri_height / 8, ri->ri_width / 8); 223 ri->ri_caps = WSSCREEN_WSCOLORS; 224 rasops_reconfig(ri, ri->ri_height / ri->ri_font->fontheight, 225 ri->ri_width / ri->ri_font->fontwidth); 226 227 acpi_platform_stdscreen.nrows = ri->ri_rows; 228 acpi_platform_stdscreen.ncols = ri->ri_cols; 229 acpi_platform_stdscreen.textops = &ri->ri_ops; 230 acpi_platform_stdscreen.capabilities = ri->ri_caps; 231 232 ri->ri_ops.allocattr(ri, 0, 0, 0, &defattr); 233 234 wsdisplay_preattach(&acpi_platform_stdscreen, ri, 0, 0, defattr); 235 } 236 #endif 237 238 static void 239 acpi_platform_startup(void) 240 { 241 ACPI_TABLE_SPCR *spcr; 242 ACPI_TABLE_FADT *fadt; 243 #ifdef MULTIPROCESSOR 244 ACPI_TABLE_MADT *madt; 245 #endif 246 int baud_rate; 247 248 /* 249 * Setup serial console device 250 */ 251 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_SPCR, (void **)&spcr))) { 252 253 switch (spcr->BaudRate) { 254 case SPCR_BAUD_9600: 255 baud_rate = 9600; 256 break; 257 case SPCR_BAUD_19200: 258 baud_rate = 19200; 259 break; 260 case SPCR_BAUD_57600: 261 baud_rate = 57600; 262 break; 263 case SPCR_BAUD_115200: 264 case SPCR_BAUD_UNKNOWN: 265 default: 266 baud_rate = 115200; 267 break; 268 } 269 270 if (spcr->SerialPort.SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY && 271 spcr->SerialPort.Address != 0) { 272 switch (spcr->InterfaceType) { 273 #if NPLCOM > 0 274 case ACPI_DBG2_ARM_PL011: 275 case ACPI_DBG2_ARM_SBSA_32BIT: 276 case ACPI_DBG2_ARM_SBSA_GENERIC: 277 plcom_console.pi_type = PLCOM_TYPE_PL011; 278 plcom_console.pi_iot = &arm_generic_bs_tag; 279 plcom_console.pi_iobase = spcr->SerialPort.Address; 280 plcom_console.pi_size = PL011COM_UART_SIZE; 281 plcom_console.pi_flags = PLC_FLAG_32BIT_ACCESS; 282 283 plcomcnattach(&plcom_console, baud_rate, 0, TTYDEF_CFLAG, -1); 284 break; 285 #endif 286 #if NCOM > 0 287 case ACPI_DBG2_16550_COMPATIBLE: 288 case ACPI_DBG2_16550_SUBSET: 289 if (ACPI_ACCESS_BIT_WIDTH(spcr->SerialPort.AccessWidth) == 8) { 290 comcnattach(&arm_generic_bs_tag, spcr->SerialPort.Address, baud_rate, -1, 291 COM_TYPE_NORMAL, TTYDEF_CFLAG); 292 } else { 293 comcnattach(&arm_generic_a4x_bs_tag, spcr->SerialPort.Address, baud_rate, -1, 294 COM_TYPE_NORMAL, TTYDEF_CFLAG); 295 } 296 break; 297 case ACPI_DBG2_BCM2835: 298 comcnattach(&arm_generic_a4x_bs_tag, spcr->SerialPort.Address + 0x40, baud_rate, -1, 299 COM_TYPE_BCMAUXUART, TTYDEF_CFLAG); 300 cn_set_magic("+++++"); 301 break; 302 #endif 303 default: 304 printf("SPCR: kernel does not support interface type %#x\n", spcr->InterfaceType); 305 break; 306 } 307 } 308 acpi_table_unmap((ACPI_TABLE_HEADER *)spcr); 309 } 310 311 /* 312 * Setup framebuffer console, if present. 313 */ 314 #if NWSDISPLAY > 0 && NGENFB > 0 315 acpi_platform_wsdisplay_preattach(); 316 #endif 317 318 /* 319 * Initialize PSCI 0.2+ if implemented 320 */ 321 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_FADT, (void **)&fadt))) { 322 if (fadt->ArmBootFlags & ACPI_FADT_PSCI_COMPLIANT) { 323 if (fadt->ArmBootFlags & ACPI_FADT_PSCI_USE_HVC) { 324 psci_init(psci_call_hvc); 325 } else { 326 psci_init(psci_call_smc); 327 } 328 } 329 acpi_table_unmap((ACPI_TABLE_HEADER *)fadt); 330 } 331 332 #ifdef MULTIPROCESSOR 333 /* 334 * Count CPUs 335 */ 336 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_MADT, (void **)&madt))) { 337 char *end = (char *)madt + madt->Header.Length; 338 char *where = (char *)madt + sizeof(ACPI_TABLE_MADT); 339 while (where < end) { 340 ACPI_SUBTABLE_HEADER *subtable = (ACPI_SUBTABLE_HEADER *)where; 341 if (subtable->Type == ACPI_MADT_TYPE_GENERIC_INTERRUPT) 342 arm_cpu_max++; 343 where += subtable->Length; 344 } 345 acpi_table_unmap((ACPI_TABLE_HEADER *)madt); 346 } 347 #endif /* MULTIPROCESSOR */ 348 } 349 350 static void 351 acpi_platform_init_attach_args(struct fdt_attach_args *faa) 352 { 353 extern struct bus_space arm_generic_bs_tag; 354 extern struct bus_space arm_generic_a4x_bs_tag; 355 356 faa->faa_bst = &arm_generic_bs_tag; 357 faa->faa_a4x_bst = &arm_generic_a4x_bs_tag; 358 faa->faa_dmat = &acpi_coherent_dma_tag; 359 } 360 361 static void 362 acpi_platform_device_register(device_t self, void *aux) 363 { 364 #if NCOM > 0 365 prop_dictionary_t prop = device_properties(self); 366 367 if (device_is_a(self, "com")) { 368 ACPI_TABLE_SPCR *spcr; 369 370 if (ACPI_FAILURE(acpi_table_find(ACPI_SIG_SPCR, (void **)&spcr))) 371 return; 372 373 if (spcr->SerialPort.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) 374 goto spcr_unmap; 375 if (spcr->SerialPort.Address == 0) 376 goto spcr_unmap; 377 if (spcr->InterfaceType != ACPI_DBG2_16550_COMPATIBLE && 378 spcr->InterfaceType != ACPI_DBG2_16550_SUBSET) 379 goto spcr_unmap; 380 381 if (device_is_a(device_parent(self), "puc")) { 382 const struct puc_attach_args * const paa = aux; 383 int b, d, f; 384 385 const int s = pci_get_segment(paa->pc); 386 pci_decompose_tag(paa->pc, paa->tag, &b, &d, &f); 387 388 if (spcr->PciSegment == s && spcr->PciBus == b && 389 spcr->PciDevice == d && spcr->PciFunction == f) 390 prop_dictionary_set_bool(prop, "force_console", true); 391 } 392 393 if (device_is_a(device_parent(self), "acpi")) { 394 struct acpi_attach_args * const aa = aux; 395 struct acpi_resources res; 396 struct acpi_mem *mem; 397 398 if (ACPI_FAILURE(acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS", 399 &res, &acpi_resource_parse_ops_quiet))) 400 goto spcr_unmap; 401 402 mem = acpi_res_mem(&res, 0); 403 if (mem == NULL) 404 goto crs_cleanup; 405 406 if (mem->ar_base == spcr->SerialPort.Address) 407 prop_dictionary_set_bool(prop, "force_console", true); 408 409 crs_cleanup: 410 acpi_resource_cleanup(&res); 411 } 412 413 spcr_unmap: 414 acpi_table_unmap((ACPI_TABLE_HEADER *)spcr); 415 } 416 #endif 417 } 418 419 static void 420 acpi_platform_reset(void) 421 { 422 #ifdef EFI_RUNTIME 423 if (arm_efirt_reset(EFI_RESET_COLD) == 0) 424 return; 425 #endif 426 if (psci_available()) 427 psci_system_reset(); 428 } 429 430 static u_int 431 acpi_platform_uart_freq(void) 432 { 433 return 0; 434 } 435 436 static const struct arm_platform acpi_platform = { 437 .ap_devmap = acpi_platform_devmap, 438 .ap_bootstrap = acpi_platform_bootstrap, 439 .ap_startup = acpi_platform_startup, 440 .ap_init_attach_args = acpi_platform_init_attach_args, 441 .ap_device_register = acpi_platform_device_register, 442 .ap_reset = acpi_platform_reset, 443 .ap_delay = gtmr_delay, 444 .ap_uart_freq = acpi_platform_uart_freq, 445 }; 446 447 ARM_PLATFORM(virt, "netbsd,generic-acpi", &acpi_platform); 448