TTYINIT

Structure used to initialize a tty device

Synopsis:

typedef struct ttyinit_entry {
    _Paddr64t			port;
    unsigned                	port_shift;
    unsigned                	intr;
    int				baud;
    int                     	isize;
    int                     	osize;
    int                     	csize;
    int                     	c_cflag;
    int                     	c_iflag;
    int                     	c_lflag;
    int                     	c_oflag;
    int                     	fifo;
    int                     	clk;
    int                     	div;
    char			name[TTY_NAME_MAX];
    char 			*pmm_parent;
    unsigned			pmflags;
    int 			verbose;
    int				highwater;
 } TTYINIT;

Description:

A character driver shares the TTYINIT structure with the io-char library. This structure is used to initialize baud rate, input, output, canonical buffer sizes, termios flags, interrupts, etc.

The members include:

port

Contains addresses of device registers.

port_shift

Used to provide spacing between registers. For example:

• 0 is for 8-bit registers
• 1 is for 16-bit registers
• 2 is for 32-bit registers

intr

The interrupt number associated with the device.

baud

The device's baud rate.

isize

The input buffer size.

osize

The output buffer size.

csize

The canonical buffer size.

c_cflag

See TTYDEV.

c_iflag

See TTYDEV.

c_lflag

See TTYDEV.

c_oflag

See TTYDEV.

fifo

See TTYDEV.

clk

The clock frequency used with the baud rate and divisor in stty.

div

The divisor used with the baud rate and clock in stty.

name

The name of the device.

pmm_parent

Power manager namespace.

pmflags

Common power-management flags. One of:

• PWR_INIT_DRVREG — register as a power-managed device.
• PWR_INIT_DRVPSTORE — driver wants its own persistent storage object .
• PWR_INIT_DRVSAVE — driver wants to store data for HWVOL or NORAM
• PWR_INIT_DRVOVERRIDE — driver will assume all setpower functionality.
• PWR_INIT_DRVNOFLOWCTL —driver should delay before powering down for flow control.
• PWR_INIT_NOPMM —indicates that there is not power manager running on init.

verbose

Driver verbosity.

highwater

ibuf highwater mark for flow control.

Classification:

QNX Neutrino

See also:

TTYDEV