211 lines
5.8 KiB
C
211 lines
5.8 KiB
C
/*-
|
|
* Copyright (c) 2003 Marcel Moolenaar
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _DEV_UART_BUS_H_
|
|
#define _DEV_UART_BUS_H_
|
|
|
|
#ifndef KLD_MODULE
|
|
#include "opt_uart.h"
|
|
#endif
|
|
|
|
#include <sys/serial.h>
|
|
#include <sys/timepps.h>
|
|
|
|
/* Drain and flush targets. */
|
|
#define UART_DRAIN_RECEIVER 0x0001
|
|
#define UART_DRAIN_TRANSMITTER 0x0002
|
|
#define UART_FLUSH_RECEIVER UART_DRAIN_RECEIVER
|
|
#define UART_FLUSH_TRANSMITTER UART_DRAIN_TRANSMITTER
|
|
|
|
/*
|
|
* Interrupt sources (in priority order). See also uart_core.c
|
|
* Note that the low order 16 bits are used to pass modem signals
|
|
* from the hardware interrupt handler to the software interrupt
|
|
* handler.
|
|
*/
|
|
#define UART_IPEND_OVERRUN 0x010000
|
|
#define UART_IPEND_BREAK 0x020000
|
|
#define UART_IPEND_RXREADY 0x040000
|
|
#define UART_IPEND_SIGCHG 0x080000
|
|
#define UART_IPEND_TXIDLE 0x100000
|
|
|
|
#define UART_IPEND_MASK 0x1f0000
|
|
#define UART_IPEND_SIGMASK 0x00ffff
|
|
|
|
/* Received character status bits. */
|
|
#define UART_STAT_BREAK 0x0100
|
|
#define UART_STAT_FRAMERR 0x0200
|
|
#define UART_STAT_OVERRUN 0x0400
|
|
#define UART_STAT_PARERR 0x0800
|
|
|
|
#define UART_SIGMASK_DTE (SER_DTR | SER_RTS)
|
|
#define UART_SIGMASK_DCE (SER_DSR | SER_CTS | SER_DCD | SER_RI)
|
|
#define UART_SIGMASK_STATE (UART_SIGMASK_DTE | UART_SIGMASK_DCE)
|
|
#define UART_SIGMASK_DELTA (UART_SIGMASK_STATE << 8)
|
|
|
|
#ifdef UART_PPS_ON_CTS
|
|
#define UART_SIG_DPPS SER_DCTS
|
|
#define UART_SIG_PPS SER_CTS
|
|
#else
|
|
#define UART_SIG_DPPS SER_DDCD
|
|
#define UART_SIG_PPS SER_DCD
|
|
#endif
|
|
|
|
/* UART_IOCTL() requests */
|
|
#define UART_IOCTL_BREAK 1
|
|
#define UART_IOCTL_IFLOW 2
|
|
#define UART_IOCTL_OFLOW 3
|
|
#define UART_IOCTL_BAUD 4
|
|
|
|
/*
|
|
* UART class & instance (=softc)
|
|
*/
|
|
struct uart_class {
|
|
KOBJ_CLASS_FIELDS;
|
|
u_int uc_range; /* Bus space address range. */
|
|
u_int uc_rclk; /* Default rclk for this device. */
|
|
};
|
|
|
|
extern struct uart_class uart_ns8250_class;
|
|
extern struct uart_class uart_sab82532_class;
|
|
extern struct uart_class uart_z8530_class;
|
|
|
|
struct uart_softc {
|
|
KOBJ_FIELDS;
|
|
struct uart_class *sc_class;
|
|
struct uart_bas sc_bas;
|
|
device_t sc_dev;
|
|
|
|
struct mtx sc_hwmtx; /* Spinlock protecting hardware. */
|
|
|
|
struct resource *sc_rres; /* Register resource. */
|
|
int sc_rrid;
|
|
int sc_rtype; /* SYS_RES_{IOPORT|MEMORY}. */
|
|
struct resource *sc_ires; /* Interrupt resource. */
|
|
void *sc_icookie;
|
|
int sc_irid;
|
|
|
|
int sc_callout:1; /* This UART is opened for callout. */
|
|
int sc_fastintr:1; /* This UART uses fast interrupts. */
|
|
int sc_hasfifo:1; /* This UART has FIFOs. */
|
|
int sc_hwiflow:1; /* This UART has HW input flow ctl. */
|
|
int sc_hwoflow:1; /* This UART has HW output flow ctl. */
|
|
int sc_leaving:1; /* This UART is going away. */
|
|
int sc_opened:1; /* This UART is open for business. */
|
|
int sc_polled:1; /* This UART has no interrupts. */
|
|
int sc_txbusy:1; /* This UART is transmitting. */
|
|
|
|
struct uart_devinfo *sc_sysdev; /* System device (or NULL). */
|
|
|
|
int sc_altbrk; /* State for alt break sequence. */
|
|
uint32_t sc_hwsig; /* Signal state. Used by HW driver. */
|
|
|
|
/* Receiver data. */
|
|
uint16_t *sc_rxbuf;
|
|
int sc_rxbufsz;
|
|
int sc_rxput;
|
|
int sc_rxget;
|
|
int sc_rxfifosz; /* Size of RX FIFO. */
|
|
|
|
/* Transmitter data. */
|
|
uint8_t *sc_txbuf;
|
|
int sc_txdatasz;
|
|
int sc_txfifosz; /* Size of TX FIFO and buffer. */
|
|
|
|
/* Pulse capturing support (PPS). */
|
|
struct pps_state sc_pps;
|
|
|
|
/* Upper layer data. */
|
|
void *sc_softih;
|
|
uint32_t sc_ttypend;
|
|
union {
|
|
/* TTY specific data. */
|
|
struct {
|
|
struct tty *tp;
|
|
} u_tty;
|
|
/* Keyboard specific data. */
|
|
struct {
|
|
} u_kbd;
|
|
} sc_u;
|
|
};
|
|
|
|
extern devclass_t uart_devclass;
|
|
extern char uart_driver_name[];
|
|
|
|
int uart_bus_attach(device_t dev);
|
|
int uart_bus_detach(device_t dev);
|
|
int uart_bus_probe(device_t dev, int regshft, int rclk, int rid, int chan);
|
|
|
|
int uart_tty_attach(struct uart_softc *);
|
|
int uart_tty_detach(struct uart_softc *);
|
|
void uart_tty_intr(void *arg);
|
|
|
|
/*
|
|
* Receive buffer operations.
|
|
*/
|
|
static __inline int
|
|
uart_rx_empty(struct uart_softc *sc)
|
|
{
|
|
return ((sc->sc_rxget == sc->sc_rxput) ? 1 : 0);
|
|
}
|
|
|
|
static __inline int
|
|
uart_rx_full(struct uart_softc *sc)
|
|
{
|
|
return ((sc->sc_rxput + 1 < sc->sc_rxbufsz)
|
|
? (sc->sc_rxput + 1 == sc->sc_rxget) : (sc->sc_rxget == 0));
|
|
}
|
|
|
|
static __inline int
|
|
uart_rx_get(struct uart_softc *sc)
|
|
{
|
|
int ptr, xc;
|
|
|
|
ptr = sc->sc_rxget;
|
|
if (ptr == sc->sc_rxput)
|
|
return (-1);
|
|
xc = sc->sc_rxbuf[ptr++];
|
|
sc->sc_rxget = (ptr < sc->sc_rxbufsz) ? ptr : 0;
|
|
return (xc);
|
|
}
|
|
|
|
static __inline int
|
|
uart_rx_put(struct uart_softc *sc, int xc)
|
|
{
|
|
int ptr;
|
|
|
|
ptr = (sc->sc_rxput + 1 < sc->sc_rxbufsz) ? sc->sc_rxput + 1 : 0;
|
|
if (ptr == sc->sc_rxget)
|
|
return (ENOSPC);
|
|
sc->sc_rxbuf[sc->sc_rxput] = xc;
|
|
sc->sc_rxput = ptr;
|
|
return (0);
|
|
}
|
|
|
|
#endif /* _DEV_UART_BUS_H_ */
|