b40ce4165d
Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
474 lines
11 KiB
C
474 lines
11 KiB
C
/*
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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 thread *td)
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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)
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return EBUSY;
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sc->sc_opened++;
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sc->sc_count=0;
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/* Start the polling */
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timeout(spictimeout, sc, spic_pollrate);
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return 0;
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}
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static int
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spicclose(dev_t dev, int flag, int fmt, struct thread *td)
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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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/* Stop polling */
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untimeout(spictimeout, sc, sc->sc_timeout_ch);
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sc->sc_opened = 0;
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return 0;
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}
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static int
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spicread(dev_t dev, struct uio *uio, int flag)
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{
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struct spic_softc *sc;
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int l, s, error;
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u_char buf[SCBUFLEN];
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sc = devclass_get_softc(spic_devclass, 0);
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if (uio->uio_resid <= 0) /* What kind of a read is this?! */
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return 0;
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s = spltty();
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while (!(sc->sc_count)) {
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sc->sc_sleeping=1;
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error = tsleep((caddr_t) sc, PZERO | PCATCH, "jogrea", 0);
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sc->sc_sleeping=0;
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if (error) {
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splx(s);
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return error;
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}
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}
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splx(s);
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s = spltty();
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l = min(uio->uio_resid, sc->sc_count);
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bcopy(sc->sc_buf, buf, l);
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sc->sc_count -= l;
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bcopy(sc->sc_buf + l, sc->sc_buf, l);
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splx(s);
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return uiomove(buf, l, uio);
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}
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static int
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spicioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
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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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return EIO;
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}
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static int
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spicpoll(dev_t dev, int events, struct thread *td)
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{
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struct spic_softc *sc;
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int revents = 0, s;
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sc = devclass_get_softc(spic_devclass, 0);
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s = spltty();
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if (events & (POLLIN | POLLRDNORM)) {
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if (sc->sc_count)
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revents |= events & (POLLIN | POLLRDNORM);
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else
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selrecord(td, &sc->sc_rsel); /* Who shall we wake? */
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}
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splx(s);
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return revents;
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}
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static device_method_t spic_methods[] = {
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DEVMETHOD(device_probe, spic_probe),
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DEVMETHOD(device_attach, spic_attach),
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{ 0, 0 }
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};
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static driver_t spic_driver = {
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"spic",
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spic_methods,
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sizeof(struct spic_softc),
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};
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DRIVER_MODULE(spic, isa, spic_driver, spic_devclass, 0, 0);
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