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const std = @import("std");
const uefi = std.os.uefi;
const Guid = uefi.Guid;
const Status = uefi.Status;
const cc = uefi.cc;
const Error = Status.Error;
pub const SerialIo = extern struct {
revision: u64,
_reset: *const fn (*SerialIo) callconv(cc) Status,
_set_attribute: *const fn (*SerialIo, u64, u32, u32, ParityType, u8, StopBitsType) callconv(cc) Status,
_set_control: *const fn (*SerialIo, u32) callconv(cc) Status,
_get_control: *const fn (*const SerialIo, *u32) callconv(cc) Status,
_write: *const fn (*SerialIo, *usize, *const anyopaque) callconv(cc) Status,
_read: *const fn (*SerialIo, *usize, *anyopaque) callconv(cc) Status,
mode: *Mode,
device_type_guid: ?*Guid,
pub const ResetError = uefi.UnexpectedError || error{DeviceError};
pub const SetAttributeError = uefi.UnexpectedError || error{
InvalidParameter,
DeviceError,
};
pub const SetControlError = uefi.UnexpectedError || error{
Unsupported,
DeviceError,
};
pub const GetControlError = uefi.UnexpectedError || error{DeviceError};
pub const WriteError = uefi.UnexpectedError || error{
DeviceError,
Timeout,
};
pub const ReadError = uefi.UnexpectedError || error{
DeviceError,
Timeout,
};
/// Resets the serial device.
pub fn reset(self: *SerialIo) ResetError!void {
switch (self._reset(self)) {
.success => {},
.device_error => return Error.DeviceError,
else => |status| return uefi.unexpectedStatus(status),
}
}
/// Sets the baud rate, receive FIFO depth, transmit/receive time out, parity, data bits, and stop bits on a serial device.
pub fn setAttribute(
self: *SerialIo,
baud_rate: u64,
receiver_fifo_depth: u32,
timeout: u32,
parity: ParityType,
data_bits: u8,
stop_bits: StopBitsType,
) SetAttributeError!void {
switch (self._set_attribute(
self,
baud_rate,
receiver_fifo_depth,
timeout,
parity,
data_bits,
stop_bits,
)) {
.success => {},
.invalid_parameter => return Error.InvalidParameter,
.device_error => return Error.DeviceError,
else => |status| return uefi.unexpectedStatus(status),
}
}
/// Sets the control bits on a serial device.
pub fn setControl(self: *SerialIo, control: u32) SetControlError!void {
switch (self._set_control(self, control)) {
.success => {},
.unsupported => return Error.Unsupported,
.device_error => return Error.DeviceError,
else => |status| return uefi.unexpectedStatus(status),
}
}
/// Retrieves the status of the control bits on a serial device.
pub fn getControl(self: *SerialIo) GetControlError!u32 {
var control: u32 = undefined;
switch (self._get_control(self, &control)) {
.success => return control,
.device_error => return Error.DeviceError,
else => |status| return uefi.unexpectedStatus(status),
}
}
/// Writes data to a serial device.
pub fn write(self: *SerialIo, buffer: []const u8) WriteError!usize {
var len: usize = buffer.len;
switch (self._write(self, &len, buffer.ptr)) {
.success => return len,
.device_error => return Error.DeviceError,
.timeout => return Error.Timeout,
else => |status| return uefi.unexpectedStatus(status),
}
}
/// Reads data from a serial device.
pub fn read(self: *SerialIo, buffer: []u8) ReadError!usize {
var len: usize = buffer.len;
switch (self._read(self, &len, buffer.ptr)) {
.success => return len,
.device_error => return Error.DeviceError,
.timeout => return Error.Timeout,
else => |status| return uefi.unexpectedStatus(status),
}
}
pub const guid align(8) = Guid{
.time_low = 0xBB25CF6F,
.time_mid = 0xF1D4,
.time_high_and_version = 0x11D2,
.clock_seq_high_and_reserved = 0x9a,
.clock_seq_low = 0x0c,
.node = [_]u8{ 0x00, 0x90, 0x27, 0x3f, 0xc1, 0xfd },
};
pub const ParityType = enum(u32) {
default_parity,
no_parity,
even_parity,
odd_parity,
mark_parity,
space_parity,
};
pub const StopBitsType = enum(u32) {
default_stop_bits,
one_stop_bit,
one_five_stop_bits,
two_stop_bits,
};
pub const Mode = extern struct {
control_mask: u32,
timeout: u32,
baud_rate: u64,
receive_fifo_depth: u32,
data_bits: u32,
parity: u32,
stop_bits: u32,
};
};
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