/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* @(#)kbd.c 8.2 (Berkeley) 10/30/93
*/
/*
* Keyboard driver - middle layer for sun keyboard off a serial line.
* This code is used by kbd_zs and sunkbd (line discipline) drivers.
*/
/*
* How many input characters we can buffer.
* The port-specific var.h may override this.
* Note: must be a power of two!
*/
#define KBD_RX_RING_SIZE 256
#define KBD_RX_RING_MASK (KBD_RX_RING_SIZE - 1)
/*
* Output buffer. Only need a few chars.
*/
#define KBD_TX_RING_SIZE 16
#define KBD_TX_RING_MASK (KBD_TX_RING_SIZE - 1)
/*
* Keyboard serial line speed defaults to 1200 bps.
*/
#define KBD_DEFAULT_BPS 1200
/*
* The deviopen and deviclose routines are provided by the
* underlying lower level driver and used as a back door when
* opening and closing the internal device.
*/
int (*k_deviopen)(device_t, int);
int (*k_deviclose)(device_t, int);
/*
* Callback provided by the lower layer (actual device driver).
* Middle layer uses it to send commands to sun keyboard.
*/
void (*k_write_data)(struct kbd_sun_softc *, int);
/* Expecting ID or layout byte from keyboard */
int k_expect;
#define KBD_EXPECT_IDCODE 1
#define KBD_EXPECT_LAYOUT 2
/* Flags to communicate with kbd_softint() */
volatile int k_intr_flags;
#define INTR_RX_OVERRUN 1
#define INTR_TX_EMPTY 2
#define INTR_ST_CHECK 4
/* Transmit state */
volatile int k_txflags;
#define K_TXBUSY 1
#define K_TXWANT 2
/*
* The transmit ring buffer.
*/
volatile u_int k_tbget; /* transmit buffer `get' index */
volatile u_int k_tbput; /* transmit buffer `put' index */
u_char k_tbuf[KBD_TX_RING_SIZE]; /* data */
/*
* The receive ring buffer.
*/
u_int k_rbget; /* ring buffer `get' index */
volatile u_int k_rbput; /* ring buffer `put' index */
u_short k_rbuf[KBD_RX_RING_SIZE]; /* rr1, data pairs */
};
/* Middle layer methods exported to the upper layer. */
extern const struct kbd_ops kbd_ops_sun;
/* Methods for the lower layer to call. */
extern int kbd_sun_input(struct kbd_sun_softc *k, int);
extern void kbd_sun_output(struct kbd_sun_softc *k, int c);
extern void kbd_sun_start_tx(struct kbd_sun_softc *k);
