x86: acpi: Add SPCR table description

Add SPCR table description as it provided in Linux kernel.

Port subtype for ACPI_DBG2_SERIAL_PORT is used as an interface type in SPCR.
Thus, provide a set of definitions to be utilized later.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/arch/x86/include/asm/acpi_table.h b/arch/x86/include/asm/acpi_table.h
index 95fae03..51cc806 100644 (file)
--- a/arch/x86/include/asm/acpi_table.h
+++ b/arch/x86/include/asm/acpi_table.h
@@ -303,6 +303,55 @@ struct acpi_mcfg_mmconfig {
 /* ACPI global NVS structure */
 struct acpi_global_nvs;
 
+/* DBG2 definitions are partially used for SPCR interface_type */
+
+/* Types for port_type field */
+
+#define ACPI_DBG2_SERIAL_PORT          0x8000
+#define ACPI_DBG2_1394_PORT            0x8001
+#define ACPI_DBG2_USB_PORT             0x8002
+#define ACPI_DBG2_NET_PORT             0x8003
+
+/* Subtypes for port_subtype field */
+
+#define ACPI_DBG2_16550_COMPATIBLE     0x0000
+#define ACPI_DBG2_16550_SUBSET         0x0001
+#define ACPI_DBG2_ARM_PL011            0x0003
+#define ACPI_DBG2_ARM_SBSA_32BIT       0x000D
+#define ACPI_DBG2_ARM_SBSA_GENERIC     0x000E
+#define ACPI_DBG2_ARM_DCC              0x000F
+#define ACPI_DBG2_BCM2835              0x0010
+
+#define ACPI_DBG2_1394_STANDARD                0x0000
+
+#define ACPI_DBG2_USB_XHCI             0x0000
+#define ACPI_DBG2_USB_EHCI             0x0001
+
+/* SPCR (Serial Port Console Redirection table) */
+struct __packed acpi_spcr {
+       struct acpi_table_header header;
+       u8 interface_type;
+       u8 reserved[3];
+       struct acpi_gen_regaddr serial_port;
+       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);