mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-29 12:03:03 +00:00
149 lines
4.2 KiB
C
149 lines
4.2 KiB
C
/*-
|
|
* Copyright (c) 1998 Nicolas Souchu, Marc Bouget
|
|
* Copyright (c) 2004 Joerg Wunsch
|
|
* 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 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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef __PCFVAR_H__
|
|
#define __PCFVAR_H__
|
|
|
|
#define IO_PCFSIZE 2
|
|
|
|
#define TIMEOUT 9999 /* XXX */
|
|
|
|
/* Status bits of S1 register (read only) */
|
|
#define nBB 0x01 /* busy when low set/reset by STOP/START*/
|
|
#define LAB 0x02 /* lost arbitration bit in multi-master mode */
|
|
#define AAS 0x04 /* addressed as slave */
|
|
#define LRB 0x08 /* last received byte when not AAS */
|
|
#define AD0 0x08 /* general call received when AAS */
|
|
#define BER 0x10 /* bus error, misplaced START or STOP */
|
|
#define STS 0x20 /* STOP detected in slave receiver mode */
|
|
#define PIN 0x80 /* pending interrupt not (r/w) */
|
|
|
|
/* Control bits of S1 register (write only) */
|
|
#define ACK 0x01
|
|
#define STO 0x02
|
|
#define STA 0x04
|
|
#define ENI 0x08
|
|
#define ES2 0x10
|
|
#define ES1 0x20
|
|
#define ESO 0x40
|
|
|
|
#define BUFSIZE 2048
|
|
|
|
#define SLAVE_TRANSMITTER 0x1
|
|
#define SLAVE_RECEIVER 0x2
|
|
|
|
#define PCF_DEFAULT_ADDR 0xaa
|
|
|
|
struct pcf_softc {
|
|
u_char pcf_addr; /* interface I2C address */
|
|
int pcf_flags; /* IIC_POLLED? */
|
|
int pcf_slave_mode; /* receiver or transmitter */
|
|
int pcf_started; /* 1 if start condition sent */
|
|
|
|
struct mtx pcf_lock;
|
|
device_t iicbus; /* the corresponding iicbus */
|
|
|
|
/* Resource handling stuff. */
|
|
struct resource *res_ioport;
|
|
int rid_ioport;
|
|
struct resource *res_irq;
|
|
int rid_irq;
|
|
void *intr_cookie;
|
|
};
|
|
#define DEVTOSOFTC(dev) ((struct pcf_softc *)device_get_softc(dev))
|
|
|
|
#define PCF_LOCK(sc) mtx_lock(&(sc)->pcf_lock)
|
|
#define PCF_UNLOCK(sc) mtx_unlock(&(sc)->pcf_lock)
|
|
#define PCF_ASSERT_LOCKED(sc) mtx_assert(&(sc)->pcf_lock, MA_OWNED)
|
|
|
|
/*
|
|
* PCF8584 datasheet : when operate at 8 MHz or more, a minimun time of
|
|
* 6 clocks cycles must be left between two consecutives access
|
|
*/
|
|
#define pcf_nops() DELAY(10)
|
|
|
|
#define dummy_read(sc) pcf_get_S0(sc)
|
|
#define dummy_write(sc) pcf_set_S0(sc, 0)
|
|
|
|
/*
|
|
* Specific register access to PCF8584
|
|
*/
|
|
static __inline void
|
|
pcf_set_S0(struct pcf_softc *sc, int data)
|
|
{
|
|
|
|
bus_write_1(sc->res_ioport, 0, data);
|
|
pcf_nops();
|
|
}
|
|
|
|
static __inline void
|
|
pcf_set_S1(struct pcf_softc *sc, int data)
|
|
{
|
|
|
|
bus_write_1(sc->res_ioport, 1, data);
|
|
pcf_nops();
|
|
}
|
|
|
|
static __inline char
|
|
pcf_get_S0(struct pcf_softc *sc)
|
|
{
|
|
char data;
|
|
|
|
data = bus_read_1(sc->res_ioport, 0);
|
|
pcf_nops();
|
|
|
|
return (data);
|
|
}
|
|
|
|
static __inline char
|
|
pcf_get_S1(struct pcf_softc *sc)
|
|
{
|
|
char data;
|
|
|
|
data = bus_read_1(sc->res_ioport, 1);
|
|
pcf_nops();
|
|
|
|
return (data);
|
|
}
|
|
|
|
extern int pcf_repeated_start(device_t, u_char, int);
|
|
extern int pcf_start(device_t, u_char, int);
|
|
extern int pcf_stop(device_t);
|
|
extern int pcf_write(device_t, const char *, int, int *, int);
|
|
extern int pcf_read(device_t, char *, int, int *, int, int);
|
|
extern int pcf_rst_card(device_t, u_char, u_char, u_char *);
|
|
extern driver_intr_t pcf_intr;
|
|
|
|
#define PCF_MODVER 1
|
|
#define PCF_MINVER 1
|
|
#define PCF_MAXVER 1
|
|
#define PCF_PREFVER PCF_MODVER
|
|
|
|
#endif /* !__PCFVAR_H__ */
|