474 lines
11 KiB
C
474 lines
11 KiB
C
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/*
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* Copyright (c) 2000 Nick Sayer
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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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* spic -- the Sony Programmable I/O Controller
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*
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* This device exists on most recent Sony laptops. It is the means by which
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* you can watch the Jog Dial and some other functions.
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*
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* At the moment, this driver merely tries to turn the jog dial into a
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* device that moused can park on, with the intent of supplying a Z axis
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* and mouse button out of the jog dial. I suspect that this device will
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* end up having to support at least 2 different minor devices: One to be
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* the jog wheel device for moused to camp out on and the other to perform
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* all of the other miscelaneous functions of this device. But for now,
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* the jog wheel is all you get.
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*
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* At the moment, the data sent back by the device is rather primitive.
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* It sends a single character per event:
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* u = up, d = down -- that's the jog button
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* l = left, r = right -- that's the dial.
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* "left" and "right" are rather caprecious. They actually represent
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* ccw and cw, respectively
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*
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* What documentation exists is thanks to Andrew Tridge, and his page at
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* http://samba.org/picturebook/ Special thanks also to Ian Dowse, who
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* also provided sample code upon which this driver was based.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <isa/isavar.h>
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#include <sys/poll.h>
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#include <machine/pci_cfgreg.h>
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#include <machine/clock.h>
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#include <sys/tty.h>
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#include <sys/conf.h>
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#include <sys/fcntl.h>
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#include <sys/dkstat.h>
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#include <sys/malloc.h>
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#include <sys/sysctl.h>
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#include <sys/uio.h>
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#include <i386/isa/spicreg.h>
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static int spic_pollrate;
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SYSCTL_INT(_machdep, OID_AUTO, spic_pollrate, CTLFLAG_RW, &spic_pollrate, 0, "")
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;
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devclass_t spic_devclass;
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static d_open_t spicopen;
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static d_close_t spicclose;
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static d_read_t spicread;
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static d_ioctl_t spicioctl;
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static d_poll_t spicpoll;
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static struct cdevsw spic_cdevsw = {
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/* open */ spicopen,
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/* close */ spicclose,
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/* read */ spicread,
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/* write */ nowrite,
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/* ioctl */ spicioctl,
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/* poll */ spicpoll,
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/* mmap */ nommap,
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/* strategy */ nostrategy,
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/* name */ "spic",
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/* maj */ CDEV_MAJOR,
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/* dump */ nodump,
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/* psize */ nopsize,
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/* flags */ 0,
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};
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#define SCBUFLEN 128
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struct spic_softc {
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u_short sc_port_addr;
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u_char sc_intr;
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struct resource *sc_port_res,*sc_intr_res;
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int sc_port_rid,sc_intr_rid;
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int sc_opened;
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int sc_sleeping;
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int sc_buttonlast;
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struct callout_handle sc_timeout_ch;
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device_t sc_dev;
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struct selinfo sc_rsel;
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u_char sc_buf[SCBUFLEN];
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int sc_count;
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};
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static void
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write_port1(struct spic_softc *sc, u_char val)
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{
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DELAY(10);
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outb(sc->sc_port_addr, val);
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}
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static void
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write_port2(struct spic_softc *sc, u_char val)
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{
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DELAY(10);
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outb(sc->sc_port_addr + 4, val);
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}
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static u_char
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read_port1(struct spic_softc *sc)
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{
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DELAY(10);
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return inb(sc->sc_port_addr);
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}
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static u_char
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read_port2(struct spic_softc *sc)
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{
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DELAY(10);
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return inb(sc->sc_port_addr + 4);
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}
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static void
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busy_wait(struct spic_softc *sc)
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{
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int i=0;
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while(read_port2(sc) & 2) {
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DELAY(10);
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if (i++>10000) {
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printf("spic busy wait abort\n");
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return;
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}
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}
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}
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static u_char
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spic_call1(struct spic_softc *sc, u_char dev) {
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busy_wait(sc);
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write_port2(sc, dev);
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read_port2(sc);
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return read_port1(sc);
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}
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static u_char
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spic_call2(struct spic_softc *sc, u_char dev, u_char fn)
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{
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busy_wait(sc);
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write_port2(sc, dev);
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busy_wait(sc);
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write_port1(sc, fn);
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return read_port1(sc);
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}
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static int
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spic_probe(device_t dev)
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{
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struct spic_softc *sc;
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u_char t, spic_irq;
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sc = device_get_softc(dev);
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/*
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* We can only have 1 of these. Attempting to probe for a unit 1
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* will destroy the work we did for unit 0
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*/
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if (device_get_unit(dev))
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return ENXIO;
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bzero(sc, sizeof(struct spic_softc));
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if (!(sc->sc_port_res = bus_alloc_resource(dev, SYS_RES_IOPORT,
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&sc->sc_port_rid, 0, ~0, 5, RF_ACTIVE))) {
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device_printf(dev,"Couldn't map I/O\n");
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return ENXIO;
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}
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sc->sc_port_addr = (u_short)rman_get_start(sc->sc_port_res);
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#ifdef notyet
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if (!(sc->sc_intr_res = bus_alloc_resource(dev, SYS_RES_IRQ,
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&sc->sc_intr_rid, 0, ~0, 1, RF_ACTIVE))) {
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device_printf(dev,"Couldn't map IRQ\n");
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bus_release_resource(dev, SYS_RES_IOPORT,
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sc->sc_port_rid, sc->sc_port_res);
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return ENXIO;
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}
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sc->sc_intr = (u_short)rman_get_start(sc->sc_intr_res);
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switch (sc->sc_intr) {
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case 0: spic_irq = 3; break;
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case 5: spic_irq = 0; break;
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case 0xa: spic_irq = 1; break;
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case 0xb: spic_irq = 2; break;
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default: device_printf(dev,"Invalid IRQ\n");
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bus_release_resource(dev, SYS_RES_IOPORT,
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sc->sc_port_rid, sc->sc_port_res);
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bus_release_resource(dev, SYS_RES_IRQ,
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sc->sc_intr_rid, sc->sc_intr_res);
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return ENXIO;
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}
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#else
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spic_irq = 3;
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#endif
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#if 0
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if (sc->sc_port_addr != 0x10A0) {
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bus_release_resource(dev, SYS_RES_IOPORT,
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sc->sc_port_rid, sc->sc_port_res);
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bus_release_resource(dev, SYS_RES_IRQ,
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sc->sc_intr_rid, sc->sc_intr_res);
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return ENXIO;
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}
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#endif
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/* PIIX4 chipset at least? */
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if (pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, 0, 4) !=
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PIIX4_DEVID)
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return ENXIO;
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/*
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* This is an ugly hack. It is necessary until ACPI works correctly.
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*
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* The SPIC consists of 2 registers. They are mapped onto I/O by the
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* PIIX4's General Device 10 function. There is also an interrupt
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* control port at a somewhat magic location, but this first pass is
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* polled.
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*
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* So the first thing we need to do is map the G10 space in.
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*
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*/
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pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10A,
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sc->sc_port_addr, 2);
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t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1);
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t &= 0xf0;
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t |= 4;
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pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1);
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outw(SPIC_IRQ_PORT, (inw(SPIC_IRQ_PORT) & ~(0x3 << SPIC_IRQ_SHIFT)) | (spic_irq << SPIC_IRQ_SHIFT));
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t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1);
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t &= 0x1f;
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t |= 0xc0;
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pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1);
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/*
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* XXX: Should try and see if there's anything actually there.
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*/
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device_set_desc(dev, "Sony Programmable I/O Controller");
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return 0;
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}
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static int
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spic_attach(device_t dev)
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{
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struct spic_softc *sc;
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sc = device_get_softc(dev);
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sc->sc_dev = dev;
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spic_pollrate = (hz/50); /* Every 50th of a second */
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spic_call1(sc, 0x82);
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spic_call2(sc, 0x81, 0xff);
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spic_call1(sc, 0x92);
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/* There can be only one */
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make_dev(&spic_cdevsw, 0, 0, 0, 0600, "jogdial");
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return 0;
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}
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static void
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spictimeout(void *arg)
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{
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struct spic_softc *sc = arg;
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u_char b, event, param;
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int j;
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if (!sc->sc_opened) {
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device_printf(sc->sc_dev, "timeout called while closed!\n");
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return;
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}
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event = read_port2(sc);
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param = read_port1(sc);
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if ((event != 4) && (!(event & 0x1)))
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switch(event) {
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case 0x10: /* jog wheel event */
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b = !!(param & 0x40);
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if (b != sc->sc_buttonlast) {
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sc->sc_buttonlast = b;
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sc->sc_buf[sc->sc_count++] =
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b?'d':'u';
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}
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j = (param & 0xf) | ((param & 0x10)? ~0xf:0);
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if (j<0)
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while(j++!=0) {
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sc->sc_buf[sc->sc_count++] =
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'l';
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}
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else if (j>0)
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while(j--!=0) {
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sc->sc_buf[sc->sc_count++] =
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'r';
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}
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break;
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case 0x60: /* Capture button */
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printf("Capture button event: %x\n",param);
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break;
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case 0x30: /* Lid switch */
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printf("Lid switch event: %x\n",param);
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break;
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default:
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printf("Unknown event: %x %x\n", event, param);
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break;
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}
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else {
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/* No event. Wait some more */
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sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate);
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return;
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}
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if (sc->sc_count) {
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if (sc->sc_sleeping) {
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sc->sc_sleeping = 0;
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wakeup((caddr_t) sc);
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}
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selwakeup(&sc->sc_rsel);
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}
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spic_call2(sc, 0x81, 0xff); /* Clear event */
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sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate);
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}
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static int
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spicopen(dev_t dev, int flag, int fmt, struct proc *p)
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{
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struct spic_softc *sc;
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sc = devclass_get_softc(spic_devclass, 0);
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|
||
|
|
if (sc->sc_opened)
|
||
|
|
return EBUSY;
|
||
|
|
|
||
|
|
sc->sc_opened++;
|
||
|
|
sc->sc_count=0;
|
||
|
|
|
||
|
|
/* Start the polling */
|
||
|
|
timeout(spictimeout, sc, spic_pollrate);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
spicclose(dev_t dev, int flag, int fmt, struct proc *p)
|
||
|
|
{
|
||
|
|
struct spic_softc *sc;
|
||
|
|
|
||
|
|
sc = devclass_get_softc(spic_devclass, 0);
|
||
|
|
|
||
|
|
/* Stop polling */
|
||
|
|
untimeout(spictimeout, sc, sc->sc_timeout_ch);
|
||
|
|
sc->sc_opened = 0;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
spicread(dev_t dev, struct uio *uio, int flag)
|
||
|
|
{
|
||
|
|
struct spic_softc *sc;
|
||
|
|
int l, s, error;
|
||
|
|
u_char buf[SCBUFLEN];
|
||
|
|
|
||
|
|
sc = devclass_get_softc(spic_devclass, 0);
|
||
|
|
|
||
|
|
if (uio->uio_resid <= 0) /* What kind of a read is this?! */
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
s = spltty();
|
||
|
|
while (!(sc->sc_count)) {
|
||
|
|
sc->sc_sleeping=1;
|
||
|
|
error = tsleep((caddr_t) sc, PZERO | PCATCH, "jogrea", 0);
|
||
|
|
sc->sc_sleeping=0;
|
||
|
|
if (error) {
|
||
|
|
splx(s);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
splx(s);
|
||
|
|
|
||
|
|
s = spltty();
|
||
|
|
l = min(uio->uio_resid, sc->sc_count);
|
||
|
|
bcopy(sc->sc_buf, buf, l);
|
||
|
|
sc->sc_count -= l;
|
||
|
|
bcopy(sc->sc_buf + l, sc->sc_buf, l);
|
||
|
|
splx(s);
|
||
|
|
return uiomove(buf, l, uio);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
spicioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
|
||
|
|
{
|
||
|
|
struct spic_softc *sc;
|
||
|
|
|
||
|
|
sc = devclass_get_softc(spic_devclass, 0);
|
||
|
|
|
||
|
|
return EIO;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
spicpoll(dev_t dev, int events, struct proc *p)
|
||
|
|
{
|
||
|
|
struct spic_softc *sc;
|
||
|
|
int revents = 0, s;
|
||
|
|
|
||
|
|
sc = devclass_get_softc(spic_devclass, 0);
|
||
|
|
s = spltty();
|
||
|
|
if (events & (POLLIN | POLLRDNORM)) {
|
||
|
|
if (sc->sc_count)
|
||
|
|
revents |= events & (POLLIN | POLLRDNORM);
|
||
|
|
else
|
||
|
|
selrecord(p, &sc->sc_rsel); /* Who shall we wake? */
|
||
|
|
}
|
||
|
|
splx(s);
|
||
|
|
|
||
|
|
return revents;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static device_method_t spic_methods[] = {
|
||
|
|
DEVMETHOD(device_probe, spic_probe),
|
||
|
|
DEVMETHOD(device_attach, spic_attach),
|
||
|
|
|
||
|
|
{ 0, 0 }
|
||
|
|
};
|
||
|
|
|
||
|
|
static driver_t spic_driver = {
|
||
|
|
"spic",
|
||
|
|
spic_methods,
|
||
|
|
sizeof(struct spic_softc),
|
||
|
|
};
|
||
|
|
|
||
|
|
DRIVER_MODULE(spic, isa, spic_driver, spic_devclass, 0, 0);
|
||
|
|
|