1 /* $NetBSD: acpi_platform.c,v 1.26 2021/05/12 23:22:32 thorpej 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 "opt_efi.h" 35 #include "opt_multiprocessor.h" 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: acpi_platform.c,v 1.26 2021/05/12 23:22:32 thorpej Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/bus.h> 42 #include <sys/cpu.h> 43 #include <sys/device.h> 44 #include <sys/termios.h> 45 #include <sys/kprintf.h> 46 47 #include <dev/fdt/fdtvar.h> 48 #include <arm/fdt/arm_fdtvar.h> 49 50 #include <uvm/uvm_extern.h> 51 52 #include <machine/bootconfig.h> 53 #include <arm/cpufunc.h> 54 #include <arm/locore.h> 55 56 #include <arm/cortex/gtmr_var.h> 57 58 #include <arm/arm/psci.h> 59 #include <arm/fdt/psci_fdtvar.h> 60 61 #include <evbarm/fdt/platform.h> 62 63 #include <evbarm/dev/plcomreg.h> 64 #include <evbarm/dev/plcomvar.h> 65 #include <dev/ic/ns16550reg.h> 66 #include <dev/ic/comreg.h> 67 #include <dev/ic/comvar.h> 68 69 #if NCOM > 0 70 #include <dev/pci/pcireg.h> 71 #include <dev/pci/pcivar.h> 72 #include <dev/pci/pucvar.h> 73 #endif 74 75 #ifdef EFI_RUNTIME 76 #include <arm/arm/efi_runtime.h> 77 #endif 78 79 #include <dev/acpi/acpireg.h> 80 #include <dev/acpi/acpivar.h> 81 #include <arm/acpi/acpi_table.h> 82 83 #include <libfdt.h> 84 85 #define SPCR_BAUD_DEFAULT 0 86 #define SPCR_BAUD_9600 3 87 #define SPCR_BAUD_19200 4 88 #define SPCR_BAUD_57600 6 89 #define SPCR_BAUD_115200 7 90 91 static const struct acpi_spcr_baud_rate { 92 uint8_t id; 93 uint32_t baud_rate; 94 } acpi_spcr_baud_rates[] = { 95 { SPCR_BAUD_DEFAULT, 0 }, 96 { SPCR_BAUD_9600, 9600 }, 97 { SPCR_BAUD_19200, 19200 }, 98 { SPCR_BAUD_57600, 57600 }, 99 { SPCR_BAUD_115200, 115200 }, 100 }; 101 102 extern struct bus_space arm_generic_bs_tag; 103 104 #if NPLCOM > 0 105 static struct plcom_instance plcom_console; 106 #endif 107 108 struct arm32_bus_dma_tag acpi_coherent_dma_tag; 109 static struct arm32_dma_range acpi_coherent_ranges[] = { 110 [0] = { 111 .dr_sysbase = 0, 112 .dr_busbase = 0, 113 .dr_len = UINTPTR_MAX, 114 .dr_flags = _BUS_DMAMAP_COHERENT, 115 } 116 }; 117 118 static const struct pmap_devmap * 119 acpi_platform_devmap(void) 120 { 121 static const struct pmap_devmap devmap[] = { 122 DEVMAP_ENTRY_END 123 }; 124 125 return devmap; 126 } 127 128 static void 129 acpi_platform_bootstrap(void) 130 { 131 extern struct arm32_bus_dma_tag arm_generic_dma_tag; 132 133 acpi_coherent_dma_tag = arm_generic_dma_tag; 134 acpi_coherent_dma_tag._ranges = acpi_coherent_ranges; 135 acpi_coherent_dma_tag._nranges = __arraycount(acpi_coherent_ranges); 136 } 137 138 static void 139 acpi_platform_attach_uart(ACPI_TABLE_SPCR *spcr) 140 { 141 #if NCOM > 0 142 struct com_regs regs; 143 bus_space_handle_t dummy_bsh; 144 u_int reg_shift; 145 #endif 146 int baud_rate, n; 147 148 /* 149 * Only MMIO access is supported today. 150 */ 151 if (spcr->SerialPort.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) { 152 return; 153 } 154 if (le64toh(spcr->SerialPort.Address) == 0) { 155 return; 156 } 157 158 /* 159 * Lookup SPCR baud rate. 160 */ 161 baud_rate = 0; 162 for (n = 0; n < __arraycount(acpi_spcr_baud_rates); n++) { 163 if (acpi_spcr_baud_rates[n].id == spcr->BaudRate) { 164 baud_rate = acpi_spcr_baud_rates[n].baud_rate; 165 break; 166 } 167 } 168 169 /* 170 * Attach console device. 171 */ 172 switch (spcr->InterfaceType) { 173 #if NPLCOM > 0 174 case ACPI_DBG2_ARM_PL011: 175 case ACPI_DBG2_ARM_SBSA_32BIT: 176 case ACPI_DBG2_ARM_SBSA_GENERIC: 177 plcom_console.pi_type = PLCOM_TYPE_PL011; 178 plcom_console.pi_iot = &arm_generic_bs_tag; 179 plcom_console.pi_iobase = le64toh(spcr->SerialPort.Address); 180 plcom_console.pi_size = PL011COM_UART_SIZE; 181 plcom_console.pi_flags = PLC_FLAG_32BIT_ACCESS; 182 183 plcomcnattach(&plcom_console, baud_rate, 0, TTYDEF_CFLAG, -1); 184 break; 185 #endif 186 187 #if NCOM > 0 188 case ACPI_DBG2_16550_COMPATIBLE: 189 case ACPI_DBG2_16550_SUBSET: 190 memset(&dummy_bsh, 0, sizeof(dummy_bsh)); 191 if (ACPI_ACCESS_BIT_WIDTH(spcr->SerialPort.AccessWidth) == 8) { 192 reg_shift = 0; 193 } else { 194 reg_shift = 2; 195 } 196 com_init_regs_stride(®s, &arm_generic_bs_tag, dummy_bsh, 197 le64toh(spcr->SerialPort.Address), reg_shift); 198 comcnattach1(®s, baud_rate, -1, COM_TYPE_NORMAL, 199 TTYDEF_CFLAG); 200 break; 201 202 case ACPI_DBG2_BCM2835: 203 memset(&dummy_bsh, 0, sizeof(dummy_bsh)); 204 com_init_regs_stride(®s, &arm_generic_bs_tag, dummy_bsh, 205 le64toh(spcr->SerialPort.Address) + 0x40, 2); 206 comcnattach1(®s, baud_rate, -1, COM_TYPE_BCMAUXUART, 207 TTYDEF_CFLAG); 208 cn_set_magic("+++++"); 209 break; 210 #endif 211 212 default: 213 printf("SPCR: kernel does not support interface type %#x\n", 214 spcr->InterfaceType); 215 break; 216 } 217 218 /* 219 * UEFI firmware may leave the console in an undesireable state (wrong 220 * foreground/background colour, etc). Reset the terminal and clear 221 * text from the cursor to the end of the screne. 222 */ 223 printf_flags(TOCONS|NOTSTAMP, "\033[0m"); 224 printf_flags(TOCONS|NOTSTAMP, "\033[0J"); 225 } 226 227 static void 228 acpi_platform_startup(void) 229 { 230 ACPI_TABLE_SPCR *spcr; 231 ACPI_TABLE_FADT *fadt; 232 #ifdef MULTIPROCESSOR 233 ACPI_TABLE_MADT *madt; 234 #endif 235 236 /* 237 * Setup serial console device 238 */ 239 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_SPCR, (void **)&spcr))) { 240 acpi_platform_attach_uart(spcr); 241 acpi_table_unmap((ACPI_TABLE_HEADER *)spcr); 242 } 243 244 /* 245 * Initialize PSCI 0.2+ if implemented 246 */ 247 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_FADT, (void **)&fadt))) { 248 const uint16_t boot_flags = le16toh(fadt->ArmBootFlags); 249 if ((boot_flags & ACPI_FADT_PSCI_COMPLIANT) != 0) { 250 if ((boot_flags & ACPI_FADT_PSCI_USE_HVC) != 0) { 251 psci_init(psci_call_hvc); 252 } else { 253 psci_init(psci_call_smc); 254 } 255 } 256 acpi_table_unmap((ACPI_TABLE_HEADER *)fadt); 257 } 258 259 #ifdef MULTIPROCESSOR 260 /* 261 * Count CPUs 262 */ 263 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_MADT, (void **)&madt))) { 264 char *end = (char *)madt + le32toh(madt->Header.Length); 265 char *where = (char *)madt + sizeof(ACPI_TABLE_MADT); 266 while (where < end) { 267 ACPI_SUBTABLE_HEADER *subtable = 268 (ACPI_SUBTABLE_HEADER *)where; 269 if (subtable->Type == ACPI_MADT_TYPE_GENERIC_INTERRUPT) 270 arm_cpu_max++; 271 where += subtable->Length; 272 } 273 acpi_table_unmap((ACPI_TABLE_HEADER *)madt); 274 } 275 #endif /* MULTIPROCESSOR */ 276 } 277 278 static void 279 acpi_platform_init_attach_args(struct fdt_attach_args *faa) 280 { 281 extern struct bus_space arm_generic_bs_tag; 282 283 faa->faa_bst = &arm_generic_bs_tag; 284 faa->faa_dmat = &acpi_coherent_dma_tag; 285 } 286 287 static void 288 acpi_platform_device_register(device_t self, void *aux) 289 { 290 #if NCOM > 0 291 prop_dictionary_t prop = device_properties(self); 292 ACPI_STATUS rv; 293 294 if (device_is_a(self, "com")) { 295 ACPI_TABLE_SPCR *spcr; 296 297 rv = acpi_table_find(ACPI_SIG_SPCR, (void **)&spcr); 298 if (ACPI_FAILURE(rv)) { 299 return; 300 } 301 302 if (spcr->SerialPort.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) { 303 goto spcr_unmap; 304 } 305 if (le64toh(spcr->SerialPort.Address) == 0) { 306 goto spcr_unmap; 307 } 308 if (spcr->InterfaceType != ACPI_DBG2_16550_COMPATIBLE && 309 spcr->InterfaceType != ACPI_DBG2_16550_SUBSET) { 310 goto spcr_unmap; 311 } 312 313 if (device_is_a(device_parent(self), "puc")) { 314 const struct puc_attach_args * const paa = aux; 315 int b, d, f; 316 317 const int s = pci_get_segment(paa->pc); 318 pci_decompose_tag(paa->pc, paa->tag, &b, &d, &f); 319 320 if (spcr->PciSegment == s && spcr->PciBus == b && 321 spcr->PciDevice == d && spcr->PciFunction == f) { 322 prop_dictionary_set_bool(prop, 323 "force_console", true); 324 } 325 } 326 327 if (device_is_a(device_parent(self), "acpi")) { 328 struct acpi_attach_args * const aa = aux; 329 struct acpi_resources res; 330 struct acpi_mem *mem; 331 332 if (ACPI_FAILURE(acpi_resource_parse(self, 333 aa->aa_node->ad_handle, "_CRS", &res, 334 &acpi_resource_parse_ops_quiet))) { 335 goto spcr_unmap; 336 } 337 338 mem = acpi_res_mem(&res, 0); 339 if (mem == NULL) { 340 goto crs_cleanup; 341 } 342 343 if (mem->ar_base == le64toh(spcr->SerialPort.Address)) { 344 prop_dictionary_set_bool(prop, 345 "force_console", true); 346 } 347 348 crs_cleanup: 349 acpi_resource_cleanup(&res); 350 } 351 352 spcr_unmap: 353 acpi_table_unmap((ACPI_TABLE_HEADER *)spcr); 354 } 355 #endif 356 } 357 358 static void 359 acpi_platform_reset(void) 360 { 361 #ifdef EFI_RUNTIME 362 if (arm_efirt_reset(EFI_RESET_COLD) == 0) 363 return; 364 #endif 365 if (psci_available()) 366 psci_system_reset(); 367 } 368 369 static u_int 370 acpi_platform_uart_freq(void) 371 { 372 return 0; 373 } 374 375 static const struct arm_platform acpi_platform = { 376 .ap_devmap = acpi_platform_devmap, 377 .ap_bootstrap = acpi_platform_bootstrap, 378 .ap_startup = acpi_platform_startup, 379 .ap_init_attach_args = acpi_platform_init_attach_args, 380 .ap_device_register = acpi_platform_device_register, 381 .ap_reset = acpi_platform_reset, 382 .ap_delay = gtmr_delay, 383 .ap_uart_freq = acpi_platform_uart_freq, 384 }; 385 386 ARM_PLATFORM(acpi, "netbsd,generic-acpi", &acpi_platform); 387