diff options
Diffstat (limited to 'sys/dev/ppbus/ppb_base.c')
| -rw-r--r-- | sys/dev/ppbus/ppb_base.c | 210 |
1 files changed, 210 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..99d2446 --- /dev/null +++ b/sys/dev/ppbus/ppb_base.c @@ -0,0 +1,210 @@ +/*- + * Copyright (c) 1997 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. + * + * $Id$ + * + */ +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/errno.h> +#include <sys/conf.h> +#include <sys/proc.h> +#include <sys/buf.h> +#include <sys/kernel.h> +#include <sys/malloc.h> +#include <sys/uio.h> +#include <sys/syslog.h> + +#include <machine/clock.h> +#include <machine/lpt.h> + +#include <vm/vm.h> +#include <vm/vm_param.h> +#include <vm/pmap.h> + +#include <i386/isa/isa.h> +#include <i386/isa/isa_device.h> + +#include <dev/ppbus/ppbconf.h> + +/* + * ppb_intr() + * + * Function called by ppcintr() when an intr occurs. + */ +void +ppb_intr(struct ppb_link *pl) +{ + struct ppb_data *ppb = pl->ppbus; + + /* + * Call chipset dependent code. + * Should be filled at chipset initialisation if needed. + */ + if (pl->adapter->intr_handler) + (*pl->adapter->intr_handler)(pl->adapter_unit); + + /* + * Call upper handler iff the bus is owned by a device and + * this device has specified an interrupt handler. + */ + if (ppb->ppb_owner && ppb->ppb_owner->intr) + (*ppb->ppb_owner->intr)(ppb->ppb_owner->id_unit); + + return; +} + +/* + * ppb_poll_device() + * + * Polls the device + * + * max is a delay in 10-milliseconds + */ +int +ppb_poll_device(struct ppb_device *dev, int max, + char mask, char status, int how) +{ + int i, error; + + for (i = 0; i < max; i++) { + if ((ppb_rstr(dev) & mask) == status) + return (0); + + switch (how) { + case PPB_NOINTR: + /* wait 10 ms */ + if ((error = tsleep((caddr_t)dev, PPBPRI, + "ppbpoll", hz/100))) + return (error); + break; + + case PPB_INTR: + default: + /* wait 10 ms */ + if ((error = tsleep((caddr_t)dev, PPBPRI | PCATCH, + "ppbpoll", hz/100))) + return (error); + break; + } + } + + return (EWOULDBLOCK); +} + +/* + * ppb_reset_epp_timeout() + * + * Reset the EPP timeout bit in the status register. + */ +int +ppb_reset_epp_timeout(struct ppb_device *dev) +{ + struct ppb_data *ppb = dev->ppb; + + if (ppb->ppb_owner != dev) + return (EACCES); + + (*ppb->ppb_link->adapter->reset_epp_timeout)(dev->id_unit); + + return (0); +} + +/* + * ppb_ecp_sync() + * + * Wait for the ECP FIFO to be empty. + */ +int +ppb_ecp_sync(struct ppb_device *dev) +{ + struct ppb_data *ppb = dev->ppb; + + if (ppb->ppb_owner != dev) + return (EACCES); + + (*ppb->ppb_link->adapter->ecp_sync)(dev->id_unit); + + return (0); +} + +/* + * ppb_get_mode() + * + * Read the mode (SPP, EPP...) of the chipset. + */ +int +ppb_get_mode(struct ppb_device *dev) +{ + return (dev->ppb->ppb_link->mode); +} + +/* + * ppb_get_epp_protocol() + * + * Read the EPP protocol (1.9 or 1.7). + */ +int +ppb_get_epp_protocol(struct ppb_device *dev) +{ + return (dev->ppb->ppb_link->epp_protocol); +} + +/* + * ppb_get_irq() + * + * Return the irq, 0 if none. + */ +int +ppb_get_irq(struct ppb_device *dev) +{ + return (dev->ppb->ppb_link->id_irq); +} + +/* + * ppb_get_status() + * + * Read the status register and update the status info. + */ +int +ppb_get_status(struct ppb_device *dev, struct ppb_status *status) +{ + struct ppb_data *ppb = dev->ppb; + register char r; + + if (ppb->ppb_owner != dev) + return (EACCES); + + r = status->status = ppb_rstr(dev); + + status->timeout = r & TIMEOUT; + status->error = !(r & nFAULT); + status->select = r & SELECT; + status->paper_end = r & ERROR; + status->ack = !(r & nACK); + status->busy = !(r & nBUSY); + + return (0); +} |
