1537078d8f
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
151 lines
4.2 KiB
C
151 lines
4.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1998 Nicolas Souchu, Marc Bouget
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* Copyright (c) 2004 Joerg Wunsch
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef __PCFVAR_H__
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#define __PCFVAR_H__
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#define IO_PCFSIZE 2
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#define TIMEOUT 9999 /* XXX */
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/* Status bits of S1 register (read only) */
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#define nBB 0x01 /* busy when low set/reset by STOP/START*/
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#define LAB 0x02 /* lost arbitration bit in multi-master mode */
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#define AAS 0x04 /* addressed as slave */
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#define LRB 0x08 /* last received byte when not AAS */
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#define AD0 0x08 /* general call received when AAS */
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#define BER 0x10 /* bus error, misplaced START or STOP */
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#define STS 0x20 /* STOP detected in slave receiver mode */
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#define PIN 0x80 /* pending interrupt not (r/w) */
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/* Control bits of S1 register (write only) */
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#define ACK 0x01
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#define STO 0x02
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#define STA 0x04
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#define ENI 0x08
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#define ES2 0x10
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#define ES1 0x20
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#define ESO 0x40
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#define BUFSIZE 2048
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#define SLAVE_TRANSMITTER 0x1
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#define SLAVE_RECEIVER 0x2
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#define PCF_DEFAULT_ADDR 0xaa
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struct pcf_softc {
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u_char pcf_addr; /* interface I2C address */
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int pcf_flags; /* IIC_POLLED? */
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int pcf_slave_mode; /* receiver or transmitter */
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int pcf_started; /* 1 if start condition sent */
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struct mtx pcf_lock;
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device_t iicbus; /* the corresponding iicbus */
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/* Resource handling stuff. */
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struct resource *res_ioport;
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int rid_ioport;
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struct resource *res_irq;
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int rid_irq;
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void *intr_cookie;
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};
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#define DEVTOSOFTC(dev) ((struct pcf_softc *)device_get_softc(dev))
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#define PCF_LOCK(sc) mtx_lock(&(sc)->pcf_lock)
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#define PCF_UNLOCK(sc) mtx_unlock(&(sc)->pcf_lock)
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#define PCF_ASSERT_LOCKED(sc) mtx_assert(&(sc)->pcf_lock, MA_OWNED)
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/*
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* PCF8584 datasheet : when operate at 8 MHz or more, a minimun time of
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* 6 clocks cycles must be left between two consecutives access
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*/
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#define pcf_nops() DELAY(10)
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#define dummy_read(sc) pcf_get_S0(sc)
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#define dummy_write(sc) pcf_set_S0(sc, 0)
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/*
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* Specific register access to PCF8584
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*/
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static __inline void
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pcf_set_S0(struct pcf_softc *sc, int data)
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{
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bus_write_1(sc->res_ioport, 0, data);
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pcf_nops();
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}
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static __inline void
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pcf_set_S1(struct pcf_softc *sc, int data)
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{
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bus_write_1(sc->res_ioport, 1, data);
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pcf_nops();
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}
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static __inline char
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pcf_get_S0(struct pcf_softc *sc)
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{
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char data;
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data = bus_read_1(sc->res_ioport, 0);
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pcf_nops();
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return (data);
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}
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static __inline char
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pcf_get_S1(struct pcf_softc *sc)
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{
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char data;
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data = bus_read_1(sc->res_ioport, 1);
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pcf_nops();
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return (data);
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}
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extern int pcf_repeated_start(device_t, u_char, int);
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extern int pcf_start(device_t, u_char, int);
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extern int pcf_stop(device_t);
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extern int pcf_write(device_t, const char *, int, int *, int);
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extern int pcf_read(device_t, char *, int, int *, int, int);
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extern int pcf_rst_card(device_t, u_char, u_char, u_char *);
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extern driver_intr_t pcf_intr;
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#define PCF_MODVER 1
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#define PCF_MINVER 1
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#define PCF_MAXVER 1
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#define PCF_PREFVER PCF_MODVER
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#endif /* !__PCFVAR_H__ */
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