[PATCH v1 03/20] ACPICA: SPCR: Update the SPCR table to version 4

Rafael J. Wysocki
2024-08-29T18:44:35Z

From: Sia Jee Heng <jeeheng.sia@starfivetech.com>

ACPICA commit 1eeff52124a45d5cd887ba5687bbad0116e4d211

The Microsoft Serial Port Console Redirection (SPCR) specification
revision 1.09 comprises additional fields [1]. The newly added fields
are:
- RISC-V SBI
- Precise Baud Rate
- namespace_string_length
- namespace_string_offset
- namespace_string

Additionaly, this code will support up to SPCR revision 1.10, as it
includes only minor wording changes.

Link: https://learn.microsoft.com/en-us/windows-hardware/drivers/serports/serial-port-console-redirection-table # [1]
Link: https://github.com/acpica/acpica/commit/1eeff521
Signed-off-by: Sia Jee Heng <jeeheng.sia@starfivetech.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
include/acpi/actbl3.h | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/include/acpi/actbl3.h b/include/acpi/actbl3.h
index 8f775e3a08fd..5cd755143b7d 100644
--- a/include/acpi/actbl3.h
+++ b/include/acpi/actbl3.h
@@ -92,10 +92,10 @@ struct acpi_table_slit {
/*******************************************************************************
*
* SPCR - Serial Port Console Redirection table
- * Version 2
+ * Version 4
*
* Conforms to "Serial Port Console Redirection Table",
- * Version 1.03, August 10, 2015
+ * Version 1.10, Jan 5, 2023
*
******************************************************************************/

@@ -112,7 +112,7 @@ struct acpi_table_spcr {
u8 stop_bits;
u8 flow_control;
u8 terminal_type;
- u8 reserved1;
+ u8 language;
u16 pci_device_id;
u16 pci_vendor_id;
u8 pci_bus;
@@ -120,7 +120,11 @@ struct acpi_table_spcr {
u8 pci_function;
u32 pci_flags;
u8 pci_segment;
- u32 reserved2;
+ u32 uart_clk_freq;
+ u32 precise_baudrate;
+ u16 name_space_string_length;
+ u16 name_space_string_offset;
+ char name_space_string[];
};

/* Masks for pci_flags field above */
--
2.43.0