+// SPDX-License-Identifier: GPL-2.0+
/*
* Based on acpi.c from coreboot
*
* Copyright (C) 2015, Saket Sinha <saket.sinha89@gmail.com>
* Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <cpu.h>
#include <dm.h>
#include <dm/uclass-internal.h>
+#include <serial.h>
#include <version.h>
#include <asm/acpi/global_nvs.h>
#include <asm/acpi_table.h>
-#include <asm/io.h>
#include <asm/ioapic.h>
#include <asm/lapic.h>
#include <asm/mpspec.h>
header->checksum = table_compute_checksum((void *)mcfg, header->length);
}
-void enter_acpi_mode(int pm1_cnt)
+static void acpi_create_spcr(struct acpi_spcr *spcr)
{
- u16 val = inw(pm1_cnt);
+ struct acpi_table_header *header = &(spcr->header);
+ struct serial_device_info serial_info = {0};
+ ulong serial_address, serial_offset;
+ uint serial_config;
+ uint serial_width;
+ int access_size;
+ int space_id;
+ int ret;
- /*
- * PM1_CNT register bit0 selects the power management event to be
- * either an SCI or SMI interrupt. When this bit is set, then power
- * management events will generate an SCI interrupt. When this bit
- * is reset power management events will generate an SMI interrupt.
- *
- * Per ACPI spec, it is the responsibility of the hardware to set
- * or reset this bit. OSPM always preserves this bit position.
- *
- * U-Boot does not support SMI. And we don't have plan to support
- * anything running in SMM within U-Boot. To create a legacy-free
- * system, and expose ourselves to OSPM as working under ACPI mode
- * already, turn this bit on.
- */
- outw(val | PM1_CNT_SCI_EN, pm1_cnt);
+ /* Fill out header fields */
+ acpi_fill_header(header, "SPCR");
+ header->length = sizeof(struct acpi_spcr);
+ header->revision = 2;
+
+ ret = serial_getinfo(&serial_info);
+ if (ret)
+ serial_info.type = SERIAL_CHIP_UNKNOWN;
+
+ /* Encode chip type */
+ switch (serial_info.type) {
+ case SERIAL_CHIP_16550_COMPATIBLE:
+ spcr->interface_type = ACPI_DBG2_16550_COMPATIBLE;
+ break;
+ case SERIAL_CHIP_UNKNOWN:
+ default:
+ spcr->interface_type = ACPI_DBG2_UNKNOWN;
+ break;
+ }
+
+ /* Encode address space */
+ switch (serial_info.addr_space) {
+ case SERIAL_ADDRESS_SPACE_MEMORY:
+ space_id = ACPI_ADDRESS_SPACE_MEMORY;
+ break;
+ case SERIAL_ADDRESS_SPACE_IO:
+ default:
+ space_id = ACPI_ADDRESS_SPACE_IO;
+ break;
+ }
+
+ serial_width = serial_info.reg_width * 8;
+ serial_offset = serial_info.reg_offset << serial_info.reg_shift;
+ serial_address = serial_info.addr + serial_offset;
+
+ /* Encode register access size */
+ switch (serial_info.reg_shift) {
+ case 0:
+ access_size = ACPI_ACCESS_SIZE_BYTE_ACCESS;
+ break;
+ case 1:
+ access_size = ACPI_ACCESS_SIZE_WORD_ACCESS;
+ break;
+ case 2:
+ access_size = ACPI_ACCESS_SIZE_DWORD_ACCESS;
+ break;
+ case 3:
+ access_size = ACPI_ACCESS_SIZE_QWORD_ACCESS;
+ break;
+ default:
+ access_size = ACPI_ACCESS_SIZE_UNDEFINED;
+ break;
+ }
+
+ debug("UART type %u @ %lx\n", spcr->interface_type, serial_address);
+
+ /* Fill GAS */
+ spcr->serial_port.space_id = space_id;
+ spcr->serial_port.bit_width = serial_width;
+ spcr->serial_port.bit_offset = 0;
+ spcr->serial_port.access_size = access_size;
+ spcr->serial_port.addrl = lower_32_bits(serial_address);
+ spcr->serial_port.addrh = upper_32_bits(serial_address);
+
+ /* Encode baud rate */
+ switch (serial_info.baudrate) {
+ case 9600:
+ spcr->baud_rate = 3;
+ break;
+ case 19200:
+ spcr->baud_rate = 4;
+ break;
+ case 57600:
+ spcr->baud_rate = 6;
+ break;
+ case 115200:
+ spcr->baud_rate = 7;
+ break;
+ default:
+ spcr->baud_rate = 0;
+ break;
+ }
+
+ ret = serial_getconfig(&serial_config);
+ if (ret)
+ serial_config = SERIAL_DEFAULT_CONFIG;
+
+ spcr->parity = SERIAL_GET_PARITY(serial_config);
+ spcr->stop_bits = SERIAL_GET_STOP(serial_config);
+
+ /* No PCI devices for now */
+ spcr->pci_device_id = 0xffff;
+ spcr->pci_vendor_id = 0xffff;
+
+ /* Fix checksum */
+ header->checksum = table_compute_checksum((void *)spcr, header->length);
}
/*
struct acpi_fadt *fadt;
struct acpi_mcfg *mcfg;
struct acpi_madt *madt;
+ struct acpi_spcr *spcr;
int i;
current = start;
acpi_add_table(rsdp, mcfg);
current = ALIGN(current, 16);
+ debug("ACPI: * SPCR\n");
+ spcr = (struct acpi_spcr *)current;
+ acpi_create_spcr(spcr);
+ current += spcr->header.length;
+ acpi_add_table(rsdp, spcr);
+ current = ALIGN(current, 16);
+
debug("current = %x\n", current);
acpi_rsdp_addr = (unsigned long)rsdp;
debug("ACPI: done\n");
- /* Don't touch ACPI hardware on HW reduced platforms */
- if (fadt->flags & ACPI_FADT_HW_REDUCED_ACPI)
- return current;
-
- /*
- * Other than waiting for OSPM to request us to switch to ACPI mode,
- * do it by ourselves, since SMI will not be triggered.
- */
- enter_acpi_mode(fadt->pm1a_cnt_blk);
-
return current;
}
{
return acpi_rsdp_addr;
}
-
-static struct acpi_rsdp *acpi_valid_rsdp(struct acpi_rsdp *rsdp)
-{
- if (strncmp((char *)rsdp, RSDP_SIG, sizeof(RSDP_SIG) - 1) != 0)
- return NULL;
-
- debug("Looking on %p for valid checksum\n", rsdp);
-
- if (table_compute_checksum((void *)rsdp, 20) != 0)
- return NULL;
- debug("acpi rsdp checksum 1 passed\n");
-
- if ((rsdp->revision > 1) &&
- (table_compute_checksum((void *)rsdp, rsdp->length) != 0))
- return NULL;
- debug("acpi rsdp checksum 2 passed\n");
-
- return rsdp;
-}
-
-struct acpi_fadt *acpi_find_fadt(void)
-{
- char *p, *end;
- struct acpi_rsdp *rsdp = NULL;
- struct acpi_rsdt *rsdt;
- struct acpi_fadt *fadt = NULL;
- int i;
-
- /* Find RSDP */
- for (p = (char *)ROM_TABLE_ADDR; p < (char *)ROM_TABLE_END; p += 16) {
- rsdp = acpi_valid_rsdp((struct acpi_rsdp *)p);
- if (rsdp)
- break;
- }
-
- if (rsdp == NULL)
- return NULL;
-
- debug("RSDP found at %p\n", rsdp);
- rsdt = (struct acpi_rsdt *)rsdp->rsdt_address;
-
- end = (char *)rsdt + rsdt->header.length;
- debug("RSDT found at %p ends at %p\n", rsdt, end);
-
- for (i = 0; ((char *)&rsdt->entry[i]) < end; i++) {
- fadt = (struct acpi_fadt *)rsdt->entry[i];
- if (strncmp((char *)fadt, "FACP", 4) == 0)
- break;
- fadt = NULL;
- }
-
- if (fadt == NULL)
- return NULL;
-
- debug("FADT found at %p\n", fadt);
- return fadt;
-}
-
-void *acpi_find_wakeup_vector(struct acpi_fadt *fadt)
-{
- struct acpi_facs *facs;
- void *wake_vec;
-
- debug("Trying to find the wakeup vector...\n");
-
- facs = (struct acpi_facs *)fadt->firmware_ctrl;
-
- if (facs == NULL) {
- debug("No FACS found, wake up from S3 not possible.\n");
- return NULL;
- }
-
- debug("FACS found at %p\n", facs);
- wake_vec = (void *)facs->firmware_waking_vector;
- debug("OS waking vector is %p\n", wake_vec);
-
- return wake_vec;
-}
projects / oweals / u-boot.git / blobdiff