TBD
Signed-off-by: Andy Shevchenko <andriy.shevche...@linux.intel.com>
---
arch/x86/include/asm/acpi_table.h | 25 ++++++++++
arch/x86/lib/acpi_table.c | 82 +++++++++++++++++++++++++++++++
2 files changed, 107 insertions(+)
diff --git a/arch/x86/include/asm/acpi_table.h
b/arch/x86/include/asm/acpi_table.h
index 95fae036f6..27435871b9 100644
--- a/arch/x86/include/asm/acpi_table.h
+++ b/arch/x86/include/asm/acpi_table.h
@@ -303,6 +303,31 @@ struct acpi_mcfg_mmconfig {
/* ACPI global NVS structure */
struct acpi_global_nvs;
+/* SPCR (Serial Port Console Redirection table) */
+struct __packed acpi_spcr {
+ struct acpi_table_header header; /* Common ACPI table header */
+ u8 interface_type; /* 0=full 16550, 1=subset of 16550 */
+ u8 reserved[3];
+ struct acpi_gen_regaddr serial_port; /* The base address of the
Serial Port register set */
+ u8 interrupt_type;
+ u8 pc_interrupt;
+ u32 interrupt; /* Global system interrupt */
+ u8 baud_rate;
+ u8 parity;
+ u8 stop_bits;
+ u8 flow_control;
+ u8 terminal_type;
+ u8 reserved1;
+ u16 pci_device_id; /* Must be 0xffff if not PCI device */
+ u16 pci_vendor_id; /* Must be 0xffff if not PCI device */
+ u8 pci_bus;
+ u8 pci_device;
+ u8 pci_function;
+ u32 pci_flags;
+ u8 pci_segment;
+ u32 reserved2;
+};
+
/* These can be used by the target port */
void acpi_fill_header(struct acpi_table_header *header, char *signature);
diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c
index c6b2026613..551a78b11a 100644
--- a/arch/x86/lib/acpi_table.c
+++ b/arch/x86/lib/acpi_table.c
@@ -12,6 +12,7 @@
#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>
@@ -338,6 +339,79 @@ static void acpi_create_mcfg(struct acpi_mcfg *mcfg)
header->checksum = table_compute_checksum((void *)mcfg, header->length);
}
+static void acpi_create_spcr(struct acpi_spcr *spcr)
+{
+ struct acpi_table_header *header = &(spcr->header);
+ struct serial_device_info info = {0};
+ int access_size;
+ int ret;
+
+ /* Fill out header fields */
+ acpi_fill_header(header, "SPCR");
+ header->length = sizeof(struct acpi_spcr);
+ header->revision = 2;
+
+ ret = serial_getinfo(&info);
+ if (ret)
+ debug("Can't get information of serial device: %d\n", ret);
+
+ /* Encode baud rate */
+ switch (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;
+ }
+
+ /* Encode register access size */
+ switch (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;
+ }
+
+ spcr->serial_port.space_id = ACPI_ADDRESS_SPACE_MEMORY;
+ spcr->serial_port.bit_width = info.reg_width;
+ spcr->serial_port.bit_offset = info.reg_offset;
+ spcr->serial_port.access_size = access_size;
+ spcr->serial_port.addrl = info.addr >> 0;
+ spcr->serial_port.addrh = info.addr >> 32;
+
+ /* Hard coded values for now */
+ spcr->parity = 0;
+ spcr->stop_bits = 1;
+
+ /* 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);
+}
+
/*
* QEMU's version of write_acpi_tables is defined in drivers/misc/qfw.c
*/
@@ -352,6 +426,7 @@ ulong write_acpi_tables(ulong start)
struct acpi_fadt *fadt;
struct acpi_mcfg *mcfg;
struct acpi_madt *madt;
+ struct acpi_spcr *spcr;
int i;
current = start;
@@ -440,6 +515,13 @@ ulong write_acpi_tables(ulong 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;
--
2.18.0
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