Home | History | Annotate | Line # | Download | only in acpi
acpi_platform.c revision 1.23 
      1 /* $NetBSD: acpi_platform.c,v 1.23 2021/02/04 22:36:52 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 (at) 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 1.23 2021/02/04 22:36:52 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 
     46 #include <dev/fdt/fdtvar.h>
     47 #include <arm/fdt/arm_fdtvar.h>
     48 
     49 #include <uvm/uvm_extern.h>
     50 
     51 #include <machine/bootconfig.h>
     52 #include <arm/cpufunc.h>
     53 #include <arm/locore.h>
     54 
     55 #include <arm/cortex/gtmr_var.h>
     56 
     57 #include <arm/arm/psci.h>
     58 #include <arm/fdt/psci_fdtvar.h>
     59 
     60 #include <evbarm/fdt/platform.h>
     61 
     62 #include <evbarm/dev/plcomreg.h>
     63 #include <evbarm/dev/plcomvar.h>
     64 #include <dev/ic/ns16550reg.h>
     65 #include <dev/ic/comreg.h>
     66 #include <dev/ic/comvar.h>
     67 
     68 #if NCOM > 0
     69 #include <dev/pci/pcireg.h>
     70 #include <dev/pci/pcivar.h>
     71 #include <dev/pci/pucvar.h>
     72 #endif
     73 
     74 #ifdef EFI_RUNTIME
     75 #include <arm/arm/efi_runtime.h>
     76 #endif
     77 
     78 #include <dev/acpi/acpireg.h>
     79 #include <dev/acpi/acpivar.h>
     80 #include <arm/acpi/acpi_table.h>
     81 
     82 #include <libfdt.h>
     83 
     84 #define	SPCR_BAUD_DEFAULT			0
     85 #define	SPCR_BAUD_9600				3
     86 #define	SPCR_BAUD_19200				4
     87 #define	SPCR_BAUD_57600				6
     88 #define	SPCR_BAUD_115200			7
     89 
     90 static const struct acpi_spcr_baud_rate {
     91 	uint8_t		id;
     92 	uint32_t	baud_rate;
     93 } acpi_spcr_baud_rates[] = {
     94 	{ SPCR_BAUD_DEFAULT,	0 },
     95 	{ SPCR_BAUD_9600,	9600 },
     96 	{ SPCR_BAUD_19200,	19200 },
     97 	{ SPCR_BAUD_57600,	57600 },
     98 	{ SPCR_BAUD_115200,	115200 },
     99 };
    100 
    101 extern struct bus_space arm_generic_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 static void
    138 acpi_platform_attach_uart(ACPI_TABLE_SPCR *spcr)
    139 {
    140 #if NCOM > 0
    141 	struct com_regs regs;
    142 	bus_space_handle_t dummy_bsh;
    143 	u_int reg_shift;
    144 #endif
    145 	int baud_rate, n;
    146 
    147 	/*
    148 	 * Only MMIO access is supported today.
    149 	 */
    150 	if (spcr->SerialPort.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) {
    151 		return;
    152 	}
    153 	if (le64toh(spcr->SerialPort.Address) == 0) {
    154 		return;
    155 	}
    156 
    157 	/*
    158 	 * Lookup SPCR baud rate.
    159 	 */
    160 	baud_rate = 0;
    161 	for (n = 0; n < __arraycount(acpi_spcr_baud_rates); n++) {
    162 		if (acpi_spcr_baud_rates[n].id == spcr->BaudRate) {
    163 			baud_rate = acpi_spcr_baud_rates[n].baud_rate;
    164 			break;
    165 		}
    166 	}
    167 
    168 	/*
    169 	 * Attach console device.
    170 	 */
    171 	switch (spcr->InterfaceType) {
    172 #if NPLCOM > 0
    173 	case ACPI_DBG2_ARM_PL011:
    174 	case ACPI_DBG2_ARM_SBSA_32BIT:
    175 	case ACPI_DBG2_ARM_SBSA_GENERIC:
    176 		plcom_console.pi_type = PLCOM_TYPE_PL011;
    177 		plcom_console.pi_iot = &arm_generic_bs_tag;
    178 		plcom_console.pi_iobase = le64toh(spcr->SerialPort.Address);
    179 		plcom_console.pi_size = PL011COM_UART_SIZE;
    180 		plcom_console.pi_flags = PLC_FLAG_32BIT_ACCESS;
    181 
    182 		plcomcnattach(&plcom_console, baud_rate, 0, TTYDEF_CFLAG, -1);
    183 		break;
    184 #endif
    185 
    186 #if NCOM > 0
    187 	case ACPI_DBG2_16550_COMPATIBLE:
    188 	case ACPI_DBG2_16550_SUBSET:
    189 		memset(&dummy_bsh, 0, sizeof(dummy_bsh));
    190 		if (ACPI_ACCESS_BIT_WIDTH(spcr->SerialPort.AccessWidth) == 8) {
    191 			reg_shift = 0;
    192 		} else {
    193 			reg_shift = 2;
    194 		}
    195 		com_init_regs_stride(&regs, &arm_generic_bs_tag, dummy_bsh,
    196 		    le64toh(spcr->SerialPort.Address), reg_shift);
    197 		comcnattach1(&regs, baud_rate, -1, COM_TYPE_NORMAL,
    198 		    TTYDEF_CFLAG);
    199 		break;
    200 
    201 	case ACPI_DBG2_BCM2835:
    202 		memset(&dummy_bsh, 0, sizeof(dummy_bsh));
    203 		com_init_regs_stride(&regs, &arm_generic_bs_tag, dummy_bsh,
    204 		    le64toh(spcr->SerialPort.Address) + 0x40, 2);
    205 		comcnattach1(&regs, baud_rate, -1, COM_TYPE_BCMAUXUART,
    206 		    TTYDEF_CFLAG);
    207 		cn_set_magic("+++++");
    208 		break;
    209 #endif
    210 
    211 	default:
    212 		printf("SPCR: kernel does not support interface type %#x\n",
    213 		    spcr->InterfaceType);
    214 		break;
    215 	}
    216 
    217 }
    218 
    219 static void
    220 acpi_platform_startup(void)
    221 {
    222 	ACPI_TABLE_SPCR *spcr;
    223 	ACPI_TABLE_FADT *fadt;
    224 #ifdef MULTIPROCESSOR
    225 	ACPI_TABLE_MADT *madt;
    226 #endif
    227 
    228 	/*
    229 	 * Setup serial console device
    230 	 */
    231 	if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_SPCR, (void **)&spcr))) {
    232 		acpi_platform_attach_uart(spcr);
    233 		acpi_table_unmap((ACPI_TABLE_HEADER *)spcr);
    234 	}
    235 
    236 	/*
    237 	 * Initialize PSCI 0.2+ if implemented
    238 	 */
    239 	if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_FADT, (void **)&fadt))) {
    240 		const uint16_t boot_flags = le16toh(fadt->ArmBootFlags);
    241 		if ((boot_flags & ACPI_FADT_PSCI_COMPLIANT) != 0) {
    242 			if ((boot_flags & ACPI_FADT_PSCI_USE_HVC) != 0) {
    243 				psci_init(psci_call_hvc);
    244 			} else {
    245 				psci_init(psci_call_smc);
    246 			}
    247 		}
    248 		acpi_table_unmap((ACPI_TABLE_HEADER *)fadt);
    249 	}
    250 
    251 #ifdef MULTIPROCESSOR
    252 	/*
    253 	 * Count CPUs
    254 	 */
    255 	if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_MADT, (void **)&madt))) {
    256 		char *end = (char *)madt + le32toh(madt->Header.Length);
    257 		char *where = (char *)madt + sizeof(ACPI_TABLE_MADT);
    258 		while (where < end) {
    259 			ACPI_SUBTABLE_HEADER *subtable =
    260 			    (ACPI_SUBTABLE_HEADER *)where;
    261 			if (subtable->Type == ACPI_MADT_TYPE_GENERIC_INTERRUPT)
    262 				arm_cpu_max++;
    263 			where += subtable->Length;
    264 		}
    265 		acpi_table_unmap((ACPI_TABLE_HEADER *)madt);
    266 	}
    267 #endif /* MULTIPROCESSOR */
    268 }
    269 
    270 static void
    271 acpi_platform_init_attach_args(struct fdt_attach_args *faa)
    272 {
    273 	extern struct bus_space arm_generic_bs_tag;
    274 
    275 	faa->faa_bst = &arm_generic_bs_tag;
    276 	faa->faa_dmat = &acpi_coherent_dma_tag;
    277 }
    278 
    279 static void
    280 acpi_platform_device_register(device_t self, void *aux)
    281 {
    282 	/* XXX Not ideal, but the only reasonable solution atm. */
    283 	acpi_device_register(self, aux);
    284 	fdtbus_device_register(self, aux);
    285 
    286 #if NCOM > 0
    287 	prop_dictionary_t prop = device_properties(self);
    288 	ACPI_STATUS rv;
    289 
    290 	if (device_is_a(self, "com")) {
    291 		ACPI_TABLE_SPCR *spcr;
    292 
    293 		rv = acpi_table_find(ACPI_SIG_SPCR, (void **)&spcr);
    294 		if (ACPI_FAILURE(rv)) {
    295 			return;
    296 		}
    297 
    298 		if (spcr->SerialPort.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) {
    299 			goto spcr_unmap;
    300 		}
    301 		if (le64toh(spcr->SerialPort.Address) == 0) {
    302 			goto spcr_unmap;
    303 		}
    304 		if (spcr->InterfaceType != ACPI_DBG2_16550_COMPATIBLE &&
    305 		    spcr->InterfaceType != ACPI_DBG2_16550_SUBSET) {
    306 			goto spcr_unmap;
    307 		}
    308 
    309 		if (device_is_a(device_parent(self), "puc")) {
    310 			const struct puc_attach_args * const paa = aux;
    311 			int b, d, f;
    312 
    313 			const int s = pci_get_segment(paa->pc);
    314 			pci_decompose_tag(paa->pc, paa->tag, &b, &d, &f);
    315 
    316 			if (spcr->PciSegment == s && spcr->PciBus == b &&
    317 			    spcr->PciDevice == d && spcr->PciFunction == f) {
    318 				prop_dictionary_set_bool(prop,
    319 				    "force_console", true);
    320 			}
    321 		}
    322 
    323 		if (device_is_a(device_parent(self), "acpi")) {
    324 			struct acpi_attach_args * const aa = aux;
    325 			struct acpi_resources res;
    326 			struct acpi_mem *mem;
    327 
    328 			if (ACPI_FAILURE(acpi_resource_parse(self,
    329 					 aa->aa_node->ad_handle, "_CRS", &res,
    330 					 &acpi_resource_parse_ops_quiet))) {
    331 				goto spcr_unmap;
    332 			}
    333 
    334 			mem = acpi_res_mem(&res, 0);
    335 			if (mem == NULL) {
    336 				goto crs_cleanup;
    337 			}
    338 
    339 			if (mem->ar_base == le64toh(spcr->SerialPort.Address)) {
    340 				prop_dictionary_set_bool(prop,
    341 				    "force_console", true);
    342 			}
    343 
    344 crs_cleanup:
    345 			acpi_resource_cleanup(&res);
    346 		}
    347 
    348 spcr_unmap:
    349 		acpi_table_unmap((ACPI_TABLE_HEADER *)spcr);
    350 	}
    351 #endif
    352 }
    353 
    354 static void
    355 acpi_platform_reset(void)
    356 {
    357 #ifdef EFI_RUNTIME
    358 	if (arm_efirt_reset(EFI_RESET_COLD) == 0)
    359 		return;
    360 #endif
    361 	if (psci_available())
    362 		psci_system_reset();
    363 }
    364 
    365 static u_int
    366 acpi_platform_uart_freq(void)
    367 {
    368 	return 0;
    369 }
    370 
    371 static const struct arm_platform acpi_platform = {
    372 	.ap_devmap = acpi_platform_devmap,
    373 	.ap_bootstrap = acpi_platform_bootstrap,
    374 	.ap_startup = acpi_platform_startup,
    375 	.ap_init_attach_args = acpi_platform_init_attach_args,
    376 	.ap_device_register = acpi_platform_device_register,
    377 	.ap_reset = acpi_platform_reset,
    378 	.ap_delay = gtmr_delay,
    379 	.ap_uart_freq = acpi_platform_uart_freq,
    380 };
    381 
    382 ARM_PLATFORM(acpi, "netbsd,generic-acpi", &acpi_platform);
    383