579 lines
12 KiB
C
579 lines
12 KiB
C
/*-
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* Copyright (c) 1997, 1998, 1999 Nicolas Souchu, Michael Smith
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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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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ppb_1284.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/uio.h>
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#include <sys/fcntl.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <dev/ppbus/ppbconf.h>
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#include <dev/ppbus/ppb_msq.h>
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#ifdef PERIPH_1284
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#include <dev/ppbus/ppb_1284.h>
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#endif
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#include <dev/ppbus/ppi.h>
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#include "ppbus_if.h"
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#include <dev/ppbus/ppbio.h>
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#define BUFSIZE 512
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struct ppi_data {
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int ppi_unit;
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int ppi_flags;
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#define HAVE_PPBUS (1<<0)
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#define HAD_PPBUS (1<<1)
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int ppi_count;
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int ppi_mode; /* IEEE1284 mode */
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char ppi_buffer[BUFSIZE];
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#ifdef PERIPH_1284
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struct resource *intr_resource; /* interrupt resource */
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void *intr_cookie; /* interrupt registration cookie */
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#endif /* PERIPH_1284 */
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};
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#define DEVTOSOFTC(dev) \
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((struct ppi_data *)device_get_softc(dev))
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#define UNITOSOFTC(unit) \
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((struct ppi_data *)devclass_get_softc(ppi_devclass, (unit)))
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#define UNITODEVICE(unit) \
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(devclass_get_device(ppi_devclass, (unit)))
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static devclass_t ppi_devclass;
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static d_open_t ppiopen;
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static d_close_t ppiclose;
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static d_ioctl_t ppiioctl;
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static d_write_t ppiwrite;
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static d_read_t ppiread;
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static struct cdevsw ppi_cdevsw = {
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.d_version = D_VERSION,
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.d_flags = D_NEEDGIANT,
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.d_open = ppiopen,
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.d_close = ppiclose,
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.d_read = ppiread,
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.d_write = ppiwrite,
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.d_ioctl = ppiioctl,
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.d_name = "ppi",
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};
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#ifdef PERIPH_1284
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static void
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ppi_enable_intr(device_t ppidev)
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{
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char r;
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device_t ppbus = device_get_parent(ppidev);
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r = ppb_rctr(ppbus);
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ppb_wctr(ppbus, r | IRQENABLE);
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return;
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}
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static void
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ppi_disable_intr(device_t ppidev)
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{
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char r;
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device_t ppbus = device_get_parent(ppidev);
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r = ppb_rctr(ppbus);
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ppb_wctr(ppbus, r & ~IRQENABLE);
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return;
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}
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#endif /* PERIPH_1284 */
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static void
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ppi_identify(driver_t *driver, device_t parent)
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{
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device_t dev;
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dev = device_find_child(parent, "ppi", 0);
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if (!dev)
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BUS_ADD_CHILD(parent, 0, "ppi", -1);
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}
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/*
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* ppi_probe()
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*/
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static int
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ppi_probe(device_t dev)
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{
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struct ppi_data *ppi;
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/* probe is always ok */
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device_set_desc(dev, "Parallel I/O");
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ppi = DEVTOSOFTC(dev);
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return (0);
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}
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/*
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* ppi_attach()
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*/
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static int
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ppi_attach(device_t dev)
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{
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#ifdef PERIPH_1284
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uintptr_t irq;
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int zero = 0;
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struct ppi_data *ppi = DEVTOSOFTC(dev);
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/* retrive the irq */
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BUS_READ_IVAR(device_get_parent(dev), dev, PPBUS_IVAR_IRQ, &irq);
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/* declare our interrupt handler */
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ppi->intr_resource = bus_alloc_resource(dev, SYS_RES_IRQ,
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&zero, irq, irq, 1, RF_ACTIVE);
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#endif /* PERIPH_1284 */
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make_dev(&ppi_cdevsw, device_get_unit(dev), /* XXX cleanup */
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UID_ROOT, GID_WHEEL,
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0600, "ppi%d", device_get_unit(dev));
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return (0);
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}
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#ifdef PERIPH_1284
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/*
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* Cable
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* -----
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*
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* Use an IEEE1284 compliant (DB25/DB25) cable with the following tricks:
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*
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* nStrobe <-> nAck 1 <-> 10
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* nAutofd <-> Busy 11 <-> 14
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* nSelectin <-> Select 17 <-> 13
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* nInit <-> nFault 15 <-> 16
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*
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*/
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static void
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ppiintr(void *arg)
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{
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device_t ppidev = (device_t)arg;
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device_t ppbus = device_get_parent(ppidev);
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struct ppi_data *ppi = DEVTOSOFTC(ppidev);
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ppi_disable_intr(ppidev);
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switch (ppb_1284_get_state(ppbus)) {
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/* accept IEEE1284 negotiation then wakeup a waiting process to
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* continue negotiation at process level */
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case PPB_FORWARD_IDLE:
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/* Event 1 */
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if ((ppb_rstr(ppbus) & (SELECT | nBUSY)) ==
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(SELECT | nBUSY)) {
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/* IEEE1284 negotiation */
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#ifdef DEBUG_1284
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printf("N");
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#endif
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/* Event 2 - prepare for reading the ext. value */
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ppb_wctr(ppbus, (PCD | STROBE | nINIT) & ~SELECTIN);
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ppb_1284_set_state(ppbus, PPB_NEGOCIATION);
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} else {
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#ifdef DEBUG_1284
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printf("0x%x", ppb_rstr(ppbus));
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#endif
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ppb_peripheral_terminate(ppbus, PPB_DONTWAIT);
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break;
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}
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/* wake up any process waiting for negotiation from
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* remote master host */
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/* XXX should set a variable to warn the process about
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* the interrupt */
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wakeup(ppi);
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break;
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default:
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#ifdef DEBUG_1284
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printf("?%d", ppb_1284_get_state(ppbus));
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#endif
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ppb_1284_set_state(ppbus, PPB_FORWARD_IDLE);
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ppb_set_mode(ppbus, PPB_COMPATIBLE);
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break;
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}
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ppi_enable_intr(ppidev);
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return;
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}
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#endif /* PERIPH_1284 */
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static int
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ppiopen(struct cdev *dev, int flags, int fmt, struct thread *td)
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{
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u_int unit = minor(dev);
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struct ppi_data *ppi = UNITOSOFTC(unit);
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device_t ppidev = UNITODEVICE(unit);
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device_t ppbus = device_get_parent(ppidev);
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int res;
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if (!ppi)
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return (ENXIO);
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if (!(ppi->ppi_flags & HAVE_PPBUS)) {
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if ((res = ppb_request_bus(ppbus, ppidev,
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(flags & O_NONBLOCK) ? PPB_DONTWAIT :
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(PPB_WAIT | PPB_INTR))))
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return (res);
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ppi->ppi_flags |= HAVE_PPBUS;
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#ifdef PERIPH_1284
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if (ppi->intr_resource) {
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/* register our interrupt handler */
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BUS_SETUP_INTR(device_get_parent(ppidev), ppidev, ppi->intr_resource,
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INTR_TYPE_TTY, ppiintr, dev, &ppi->intr_cookie);
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}
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#endif /* PERIPH_1284 */
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}
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ppi->ppi_count += 1;
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return (0);
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}
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static int
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ppiclose(struct cdev *dev, int flags, int fmt, struct thread *td)
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{
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u_int unit = minor(dev);
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struct ppi_data *ppi = UNITOSOFTC(unit);
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device_t ppidev = UNITODEVICE(unit);
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device_t ppbus = device_get_parent(ppidev);
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ppi->ppi_count --;
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if (!ppi->ppi_count) {
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#ifdef PERIPH_1284
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switch (ppb_1284_get_state(ppbus)) {
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case PPB_PERIPHERAL_IDLE:
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ppb_peripheral_terminate(ppbus, 0);
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break;
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case PPB_REVERSE_IDLE:
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case PPB_EPP_IDLE:
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case PPB_ECP_FORWARD_IDLE:
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default:
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ppb_1284_terminate(ppbus);
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break;
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}
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#endif /* PERIPH_1284 */
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/* unregistration of interrupt forced by release */
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ppb_release_bus(ppbus, ppidev);
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ppi->ppi_flags &= ~HAVE_PPBUS;
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}
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return (0);
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}
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/*
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* ppiread()
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*
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* IEEE1284 compliant read.
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*
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* First, try negotiation to BYTE then NIBBLE mode
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* If no data is available, wait for it otherwise transfer as much as possible
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*/
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static int
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ppiread(struct cdev *dev, struct uio *uio, int ioflag)
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{
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#ifdef PERIPH_1284
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u_int unit = minor(dev);
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struct ppi_data *ppi = UNITOSOFTC(unit);
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device_t ppidev = UNITODEVICE(unit);
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device_t ppbus = device_get_parent(ppidev);
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int len, error = 0;
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switch (ppb_1284_get_state(ppbus)) {
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case PPB_PERIPHERAL_IDLE:
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ppb_peripheral_terminate(ppbus, 0);
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/* FALLTHROUGH */
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case PPB_FORWARD_IDLE:
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/* if can't negotiate NIBBLE mode then try BYTE mode,
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* the peripheral may be a computer
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*/
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if ((ppb_1284_negociate(ppbus,
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ppi->ppi_mode = PPB_NIBBLE, 0))) {
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/* XXX Wait 2 seconds to let the remote host some
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* time to terminate its interrupt
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*/
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tsleep(ppi, PPBPRI, "ppiread", 2*hz);
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if ((error = ppb_1284_negociate(ppbus,
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ppi->ppi_mode = PPB_BYTE, 0)))
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return (error);
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}
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break;
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case PPB_REVERSE_IDLE:
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case PPB_EPP_IDLE:
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case PPB_ECP_FORWARD_IDLE:
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default:
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break;
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}
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#ifdef DEBUG_1284
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printf("N");
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#endif
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/* read data */
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len = 0;
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while (uio->uio_resid) {
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if ((error = ppb_1284_read(ppbus, ppi->ppi_mode,
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ppi->ppi_buffer, min(BUFSIZE, uio->uio_resid),
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&len))) {
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goto error;
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}
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if (!len)
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goto error; /* no more data */
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#ifdef DEBUG_1284
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printf("d");
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#endif
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if ((error = uiomove(ppi->ppi_buffer, len, uio)))
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goto error;
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}
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error:
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#else /* PERIPH_1284 */
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int error = ENODEV;
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#endif
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return (error);
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}
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/*
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* ppiwrite()
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*
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* IEEE1284 compliant write
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*
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* Actually, this is the peripheral side of a remote IEEE1284 read
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*
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* The first part of the negotiation (IEEE1284 device detection) is
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* done at interrupt level, then the remaining is done by the writing
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* process
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*
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* Once negotiation done, transfer data
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*/
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static int
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ppiwrite(struct cdev *dev, struct uio *uio, int ioflag)
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{
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#ifdef PERIPH_1284
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u_int unit = minor(dev);
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struct ppi_data *ppi = UNITOSOFTC(unit);
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device_t ppidev = UNITODEVICE(unit);
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device_t ppbus = device_get_parent(ppidev);
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int len, error = 0, sent;
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#if 0
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int ret;
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#define ADDRESS MS_PARAM(0, 0, MS_TYP_PTR)
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#define LENGTH MS_PARAM(0, 1, MS_TYP_INT)
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struct ppb_microseq msq[] = {
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{ MS_OP_PUT, { MS_UNKNOWN, MS_UNKNOWN, MS_UNKNOWN } },
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MS_RET(0)
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};
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/* negotiate ECP mode */
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if (ppb_1284_negociate(ppbus, PPB_ECP, 0)) {
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printf("ppiwrite: ECP negotiation failed\n");
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}
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while (!error && (len = min(uio->uio_resid, BUFSIZE))) {
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uiomove(ppi->ppi_buffer, len, uio);
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ppb_MS_init_msq(msq, 2, ADDRESS, ppi->ppi_buffer, LENGTH, len);
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error = ppb_MS_microseq(ppbus, msq, &ret);
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}
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#endif
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/* we have to be peripheral to be able to send data, so
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* wait for the appropriate state
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*/
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if (ppb_1284_get_state(ppbus) < PPB_PERIPHERAL_NEGOCIATION)
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ppb_1284_terminate(ppbus);
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while (ppb_1284_get_state(ppbus) != PPB_PERIPHERAL_IDLE) {
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/* XXX should check a variable before sleeping */
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#ifdef DEBUG_1284
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printf("s");
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#endif
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ppi_enable_intr(ppidev);
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/* sleep until IEEE1284 negotiation starts */
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error = tsleep(ppi, PCATCH | PPBPRI, "ppiwrite", 0);
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switch (error) {
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case 0:
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/* negotiate peripheral side with BYTE mode */
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ppb_peripheral_negociate(ppbus, PPB_BYTE, 0);
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break;
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case EWOULDBLOCK:
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break;
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default:
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goto error;
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}
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}
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#ifdef DEBUG_1284
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printf("N");
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#endif
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/* negotiation done, write bytes to master host */
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while ((len = min(uio->uio_resid, BUFSIZE)) != 0) {
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uiomove(ppi->ppi_buffer, len, uio);
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if ((error = byte_peripheral_write(ppbus,
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ppi->ppi_buffer, len, &sent)))
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goto error;
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#ifdef DEBUG_1284
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printf("d");
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#endif
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}
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error:
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|
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#else /* PERIPH_1284 */
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int error = ENODEV;
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#endif
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|
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return (error);
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}
|
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|
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static int
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ppiioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags, struct thread *td)
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{
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u_int unit = minor(dev);
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device_t ppidev = UNITODEVICE(unit);
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device_t ppbus = device_get_parent(ppidev);
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int error = 0;
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u_int8_t *val = (u_int8_t *)data;
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switch (cmd) {
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case PPIGDATA: /* get data register */
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*val = ppb_rdtr(ppbus);
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break;
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case PPIGSTATUS: /* get status bits */
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*val = ppb_rstr(ppbus);
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break;
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case PPIGCTRL: /* get control bits */
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*val = ppb_rctr(ppbus);
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break;
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case PPIGEPPD: /* get EPP data bits */
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*val = ppb_repp_D(ppbus);
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break;
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case PPIGECR: /* get ECP bits */
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*val = ppb_recr(ppbus);
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break;
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case PPIGFIFO: /* read FIFO */
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*val = ppb_rfifo(ppbus);
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break;
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case PPISDATA: /* set data register */
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ppb_wdtr(ppbus, *val);
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break;
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case PPISSTATUS: /* set status bits */
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ppb_wstr(ppbus, *val);
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break;
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case PPISCTRL: /* set control bits */
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ppb_wctr(ppbus, *val);
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break;
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case PPISEPPD: /* set EPP data bits */
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ppb_wepp_D(ppbus, *val);
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break;
|
|
case PPISECR: /* set ECP bits */
|
|
ppb_wecr(ppbus, *val);
|
|
break;
|
|
case PPISFIFO: /* write FIFO */
|
|
ppb_wfifo(ppbus, *val);
|
|
break;
|
|
case PPIGEPPA: /* get EPP address bits */
|
|
*val = ppb_repp_A(ppbus);
|
|
break;
|
|
case PPISEPPA: /* set EPP address bits */
|
|
ppb_wepp_A(ppbus, *val);
|
|
break;
|
|
default:
|
|
error = ENOTTY;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static device_method_t ppi_methods[] = {
|
|
/* device interface */
|
|
DEVMETHOD(device_identify, ppi_identify),
|
|
DEVMETHOD(device_probe, ppi_probe),
|
|
DEVMETHOD(device_attach, ppi_attach),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t ppi_driver = {
|
|
"ppi",
|
|
ppi_methods,
|
|
sizeof(struct ppi_data),
|
|
};
|
|
DRIVER_MODULE(ppi, ppbus, ppi_driver, ppi_devclass, 0, 0);
|
|
MODULE_DEPEND(ppi, ppbus, 1, 1, 1);
|