diff options
Diffstat (limited to 'sys/dev/ppbus/ppb_base.c')
| -rw-r--r-- | sys/dev/ppbus/ppb_base.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/sys/dev/ppbus/ppb_base.c b/sys/dev/ppbus/ppb_base.c new file mode 100644 index 0000000..d74216c --- /dev/null +++ b/sys/dev/ppbus/ppb_base.c @@ -0,0 +1,195 @@ +/*- + * Copyright (c) 1997, 1998, 1999 Nicolas Souchu + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + * + */ +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/bus.h> + + +#include <dev/ppbus/ppbconf.h> + +#include "ppbus_if.h" + +#include <dev/ppbus/ppbio.h> + +#define DEVTOSOFTC(dev) ((struct ppb_data *)device_get_softc(dev)) + +/* + * ppb_poll_bus() + * + * Polls the bus + * + * max is a delay in 10-milliseconds + */ +int +ppb_poll_bus(device_t bus, int max, + char mask, char status, int how) +{ + int i, j, error; + char r; + + /* try at least up to 10ms */ + for (j = 0; j < ((how & PPB_POLL) ? max : 1); j++) { + for (i = 0; i < 10000; i++) { + r = ppb_rstr(bus); + DELAY(1); + if ((r & mask) == status) + return (0); + } + } + + if (!(how & PPB_POLL)) { + for (i = 0; max == PPB_FOREVER || i < max-1; i++) { + if ((ppb_rstr(bus) & mask) == status) + return (0); + + switch (how) { + case PPB_NOINTR: + /* wait 10 ms */ + tsleep((caddr_t)bus, PPBPRI, "ppbpoll", hz/100); + break; + + case PPB_INTR: + default: + /* wait 10 ms */ + if (((error = tsleep((caddr_t)bus, PPBPRI | PCATCH, + "ppbpoll", hz/100)) != EWOULDBLOCK) != 0) { + return (error); + } + break; + } + } + } + + return (EWOULDBLOCK); +} + +/* + * ppb_get_epp_protocol() + * + * Return the chipset EPP protocol + */ +int +ppb_get_epp_protocol(device_t bus) +{ + uintptr_t protocol; + + BUS_READ_IVAR(device_get_parent(bus), bus, PPC_IVAR_EPP_PROTO, &protocol); + + return (protocol); +} + +/* + * ppb_get_mode() + * + */ +int +ppb_get_mode(device_t bus) +{ + struct ppb_data *ppb = DEVTOSOFTC(bus); + + /* XXX yet device mode = ppbus mode = chipset mode */ + return (ppb->mode); +} + +/* + * ppb_set_mode() + * + * Set the operating mode of the chipset, return the previous mode + */ +int +ppb_set_mode(device_t bus, int mode) +{ + struct ppb_data *ppb = DEVTOSOFTC(bus); + int old_mode = ppb_get_mode(bus); + + if (PPBUS_SETMODE(device_get_parent(bus), mode)) + return -1; + + /* XXX yet device mode = ppbus mode = chipset mode */ + ppb->mode = (mode & PPB_MASK); + + return (old_mode); +} + +/* + * ppb_write() + * + * Write charaters to the port + */ +int +ppb_write(device_t bus, char *buf, int len, int how) +{ + return (PPBUS_WRITE(device_get_parent(bus), buf, len, how)); +} + +/* + * ppb_reset_epp_timeout() + * + * Reset the EPP timeout bit in the status register + */ +int +ppb_reset_epp_timeout(device_t bus) +{ + return(PPBUS_RESET_EPP(device_get_parent(bus))); +} + +/* + * ppb_ecp_sync() + * + * Wait for the ECP FIFO to be empty + */ +int +ppb_ecp_sync(device_t bus) +{ + return (PPBUS_ECP_SYNC(device_get_parent(bus))); +} + +/* + * ppb_get_status() + * + * Read the status register and update the status info + */ +int +ppb_get_status(device_t bus, struct ppb_status *status) +{ + register char r; + + r = status->status = ppb_rstr(bus); + + status->timeout = r & TIMEOUT; + status->error = !(r & nFAULT); + status->select = r & SELECT; + status->paper_end = r & PERROR; + status->ack = !(r & nACK); + status->busy = !(r & nBUSY); + + return (0); +} |
