mirror of
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synced 2024-12-16 10:20:30 +00:00
aad970f1fe
Also some minor style cleanups.
561 lines
13 KiB
C
561 lines
13 KiB
C
/*-
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* Copyright (c) 1997, 1998, 1999 Nicolas Souchu
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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/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/malloc.h>
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#include <dev/ppbus/ppbconf.h>
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#include <dev/ppbus/ppb_1284.h>
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#include "ppbus_if.h"
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#define DEVTOSOFTC(dev) ((struct ppb_data *)device_get_softc(dev))
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static MALLOC_DEFINE(M_PPBUSDEV, "ppbusdev", "Parallel Port bus device");
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/*
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* Device methods
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*/
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static void
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ppbus_print_child(device_t bus, device_t dev)
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{
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struct ppb_device *ppbdev;
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bus_print_child_header(bus, dev);
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ppbdev = (struct ppb_device *)device_get_ivars(dev);
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if (ppbdev->flags != 0)
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printf(" flags 0x%x", ppbdev->flags);
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printf(" on %s%d\n", device_get_name(bus), device_get_unit(bus));
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return;
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}
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static int
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ppbus_probe(device_t dev)
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{
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device_set_desc(dev, "Parallel port bus");
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return (0);
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}
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/*
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* ppbus_add_child()
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*
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* Add a ppbus device, allocate/initialize the ivars
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*/
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static device_t
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ppbus_add_child(device_t dev, int order, const char *name, int unit)
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{
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struct ppb_device *ppbdev;
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device_t child;
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/* allocate ivars for the new ppbus child */
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ppbdev = malloc(sizeof(struct ppb_device), M_PPBUSDEV,
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M_NOWAIT | M_ZERO);
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if (!ppbdev)
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return NULL;
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/* initialize the ivars */
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ppbdev->name = name;
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/* add the device as a child to the ppbus bus with the allocated
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* ivars */
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child = device_add_child_ordered(dev, order, name, unit);
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device_set_ivars(child, ppbdev);
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return child;
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}
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static int
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ppbus_read_ivar(device_t bus, device_t dev, int index, uintptr_t* val)
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{
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struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(dev);
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switch (index) {
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case PPBUS_IVAR_MODE:
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/* XXX yet device mode = ppbus mode = chipset mode */
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*val = (u_long)ppb_get_mode(bus);
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ppbdev->mode = (u_short)*val;
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break;
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case PPBUS_IVAR_AVM:
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*val = (u_long)ppbdev->avm;
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break;
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case PPBUS_IVAR_IRQ:
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BUS_READ_IVAR(device_get_parent(bus), bus, PPC_IVAR_IRQ, val);
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break;
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default:
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return (ENOENT);
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}
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return (0);
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}
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static int
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ppbus_write_ivar(device_t bus, device_t dev, int index, u_long val)
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{
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struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(dev);
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switch (index) {
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case PPBUS_IVAR_MODE:
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/* XXX yet device mode = ppbus mode = chipset mode */
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ppb_set_mode(bus,val);
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ppbdev->mode = ppb_get_mode(bus);
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break;
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default:
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return (ENOENT);
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}
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return (0);
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}
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#define PPB_PNP_PRINTER 0
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#define PPB_PNP_MODEM 1
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#define PPB_PNP_NET 2
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#define PPB_PNP_HDC 3
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#define PPB_PNP_PCMCIA 4
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#define PPB_PNP_MEDIA 5
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#define PPB_PNP_FDC 6
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#define PPB_PNP_PORTS 7
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#define PPB_PNP_SCANNER 8
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#define PPB_PNP_DIGICAM 9
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#ifndef DONTPROBE_1284
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static char *pnp_tokens[] = {
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"PRINTER", "MODEM", "NET", "HDC", "PCMCIA", "MEDIA",
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"FDC", "PORTS", "SCANNER", "DIGICAM", "", NULL };
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#if 0
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static char *pnp_classes[] = {
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"printer", "modem", "network device",
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"hard disk", "PCMCIA", "multimedia device",
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"floppy disk", "ports", "scanner",
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"digital camera", "unknown device", NULL };
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#endif
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/*
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* search_token()
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*
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* Search the first occurence of a token within a string
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*/
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static char *
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search_token(char *str, int slen, char *token)
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{
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int tlen, i;
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#define UNKNOWN_LENGTH -1
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if (slen == UNKNOWN_LENGTH)
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/* get string's length */
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slen = strlen(str);
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/* get token's length */
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tlen = strlen(token);
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if (tlen == 0)
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return (str);
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for (i = 0; i <= slen-tlen; i++) {
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if (strncmp(str + i, token, tlen) == 0)
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return (&str[i]);
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}
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return (NULL);
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}
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/*
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* ppb_pnp_detect()
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*
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* Returns the class id. of the peripherial, -1 otherwise
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*/
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static int
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ppb_pnp_detect(device_t bus)
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{
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char *token, *class = 0;
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int i, len, error;
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int class_id = -1;
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char str[PPB_PnP_STRING_SIZE+1];
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int unit = device_get_unit(bus);
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printf("Probing for PnP devices on ppbus%d:\n", unit);
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if ((error = ppb_1284_read_id(bus, PPB_NIBBLE, str,
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PPB_PnP_STRING_SIZE, &len)))
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goto end_detect;
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#ifdef DEBUG_1284
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printf("ppb: <PnP> %d characters: ", len);
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for (i = 0; i < len; i++)
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printf("%c(0x%x) ", str[i], str[i]);
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printf("\n");
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#endif
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/* replace ';' characters by '\0' */
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for (i = 0; i < len; i++)
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str[i] = (str[i] == ';') ? '\0' : str[i];
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if ((token = search_token(str, len, "MFG")) != NULL ||
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(token = search_token(str, len, "MANUFACTURER")) != NULL)
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printf("ppbus%d: <%s", unit,
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search_token(token, UNKNOWN_LENGTH, ":") + 1);
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else
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printf("ppbus%d: <unknown", unit);
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if ((token = search_token(str, len, "MDL")) != NULL ||
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(token = search_token(str, len, "MODEL")) != NULL)
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printf(" %s",
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search_token(token, UNKNOWN_LENGTH, ":") + 1);
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else
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printf(" unknown");
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if ((token = search_token(str, len, "VER")) != NULL)
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printf("/%s",
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search_token(token, UNKNOWN_LENGTH, ":") + 1);
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if ((token = search_token(str, len, "REV")) != NULL)
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printf(".%s",
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search_token(token, UNKNOWN_LENGTH, ":") + 1);
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printf(">");
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if ((token = search_token(str, len, "CLS")) != NULL) {
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class = search_token(token, UNKNOWN_LENGTH, ":") + 1;
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printf(" %s", class);
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}
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if ((token = search_token(str, len, "CMD")) != NULL ||
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(token = search_token(str, len, "COMMAND")) != NULL)
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printf(" %s",
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search_token(token, UNKNOWN_LENGTH, ":") + 1);
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printf("\n");
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if (class)
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/* identify class ident */
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for (i = 0; pnp_tokens[i] != NULL; i++) {
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if (search_token(class, len, pnp_tokens[i]) != NULL) {
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class_id = i;
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goto end_detect;
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}
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}
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class_id = PPB_PnP_UNKNOWN;
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end_detect:
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return (class_id);
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}
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/*
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* ppb_scan_bus()
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*
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* Scan the ppbus for IEEE1284 compliant devices
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*/
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static int
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ppb_scan_bus(device_t bus)
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{
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struct ppb_data * ppb = (struct ppb_data *)device_get_softc(bus);
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int error = 0;
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int unit = device_get_unit(bus);
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/* try all IEEE1284 modes, for one device only
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*
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* XXX We should implement the IEEE1284.3 standard to detect
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* daisy chained devices
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*/
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error = ppb_1284_negociate(bus, PPB_NIBBLE, PPB_REQUEST_ID);
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if ((ppb->state == PPB_ERROR) && (ppb->error == PPB_NOT_IEEE1284))
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goto end_scan;
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ppb_1284_terminate(bus);
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printf("ppbus%d: IEEE1284 device found ", unit);
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if (!(error = ppb_1284_negociate(bus, PPB_NIBBLE, 0))) {
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printf("/NIBBLE");
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ppb_1284_terminate(bus);
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}
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if (!(error = ppb_1284_negociate(bus, PPB_PS2, 0))) {
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printf("/PS2");
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ppb_1284_terminate(bus);
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}
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if (!(error = ppb_1284_negociate(bus, PPB_ECP, 0))) {
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printf("/ECP");
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ppb_1284_terminate(bus);
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}
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if (!(error = ppb_1284_negociate(bus, PPB_ECP, PPB_USE_RLE))) {
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printf("/ECP_RLE");
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ppb_1284_terminate(bus);
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}
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if (!(error = ppb_1284_negociate(bus, PPB_EPP, 0))) {
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printf("/EPP");
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ppb_1284_terminate(bus);
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}
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/* try more IEEE1284 modes */
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if (bootverbose) {
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if (!(error = ppb_1284_negociate(bus, PPB_NIBBLE,
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PPB_REQUEST_ID))) {
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printf("/NIBBLE_ID");
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ppb_1284_terminate(bus);
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}
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if (!(error = ppb_1284_negociate(bus, PPB_PS2,
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PPB_REQUEST_ID))) {
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printf("/PS2_ID");
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ppb_1284_terminate(bus);
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}
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if (!(error = ppb_1284_negociate(bus, PPB_ECP,
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PPB_REQUEST_ID))) {
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printf("/ECP_ID");
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ppb_1284_terminate(bus);
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}
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if (!(error = ppb_1284_negociate(bus, PPB_ECP,
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PPB_REQUEST_ID | PPB_USE_RLE))) {
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printf("/ECP_RLE_ID");
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ppb_1284_terminate(bus);
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}
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if (!(error = ppb_1284_negociate(bus, PPB_COMPATIBLE,
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PPB_EXTENSIBILITY_LINK))) {
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printf("/Extensibility Link");
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ppb_1284_terminate(bus);
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}
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}
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printf("\n");
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/* detect PnP devices */
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ppb->class_id = ppb_pnp_detect(bus);
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return (0);
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end_scan:
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return (error);
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}
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#endif /* !DONTPROBE_1284 */
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static int
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ppbus_attach(device_t dev)
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{
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/* Locate our children */
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bus_generic_probe(dev);
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#ifndef DONTPROBE_1284
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/* detect IEEE1284 compliant devices */
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ppb_scan_bus(dev);
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#endif /* !DONTPROBE_1284 */
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/* launch attachement of the added children */
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bus_generic_attach(dev);
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return 0;
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}
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static int
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ppbus_setup_intr(device_t bus, device_t child, struct resource *r, int flags,
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void (*ihand)(void *), void *arg, void **cookiep)
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{
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int error;
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struct ppb_data *ppb = DEVTOSOFTC(bus);
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struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(child);
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/* a device driver must own the bus to register an interrupt */
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if (ppb->ppb_owner != child)
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return (EINVAL);
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if ((error = BUS_SETUP_INTR(device_get_parent(bus), child, r, flags,
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ihand, arg, cookiep)))
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return (error);
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/* store the resource and the cookie for eventually forcing
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* handler unregistration
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*/
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ppbdev->intr_cookie = *cookiep;
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ppbdev->intr_resource = r;
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return (0);
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}
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static int
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ppbus_teardown_intr(device_t bus, device_t child, struct resource *r, void *ih)
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{
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struct ppb_data *ppb = DEVTOSOFTC(bus);
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struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(child);
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/* a device driver must own the bus to unregister an interrupt */
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if ((ppb->ppb_owner != child) || (ppbdev->intr_cookie != ih) ||
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(ppbdev->intr_resource != r))
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return (EINVAL);
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ppbdev->intr_cookie = 0;
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ppbdev->intr_resource = 0;
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/* pass unregistration to the upper layer */
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return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, ih));
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}
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/*
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* ppb_request_bus()
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*
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* Allocate the device to perform transfers.
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*
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* how : PPB_WAIT or PPB_DONTWAIT
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*/
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int
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ppb_request_bus(device_t bus, device_t dev, int how)
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{
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int s, error = 0;
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struct ppb_data *ppb = DEVTOSOFTC(bus);
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struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(dev);
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while (!error) {
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s = splhigh();
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if (ppb->ppb_owner) {
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splx(s);
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switch (how) {
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case (PPB_WAIT | PPB_INTR):
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error = tsleep(ppb, PPBPRI|PCATCH, "ppbreq", 0);
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break;
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case (PPB_WAIT | PPB_NOINTR):
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error = tsleep(ppb, PPBPRI, "ppbreq", 0);
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break;
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default:
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return (EWOULDBLOCK);
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break;
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}
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} else {
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ppb->ppb_owner = dev;
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/* restore the context of the device
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* The first time, ctx.valid is certainly false
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* then do not change anything. This is usefull for
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* drivers that do not set there operating mode
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* during attachement
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*/
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if (ppbdev->ctx.valid)
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ppb_set_mode(bus, ppbdev->ctx.mode);
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splx(s);
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return (0);
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}
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}
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return (error);
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}
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/*
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* ppb_release_bus()
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*
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* Release the device allocated with ppb_request_bus()
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*/
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int
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ppb_release_bus(device_t bus, device_t dev)
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{
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int s, error;
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struct ppb_data *ppb = DEVTOSOFTC(bus);
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struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(dev);
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if (ppbdev->intr_resource != 0)
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/* force interrupt handler unregistration when the ppbus is released */
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if ((error = BUS_TEARDOWN_INTR(bus, dev, ppbdev->intr_resource,
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ppbdev->intr_cookie)))
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return (error);
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s = splhigh();
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if (ppb->ppb_owner != dev) {
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splx(s);
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return (EACCES);
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}
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ppb->ppb_owner = 0;
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splx(s);
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/* save the context of the device */
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ppbdev->ctx.mode = ppb_get_mode(bus);
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/* ok, now the context of the device is valid */
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ppbdev->ctx.valid = 1;
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/* wakeup waiting processes */
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wakeup(ppb);
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return (0);
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}
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static devclass_t ppbus_devclass;
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static device_method_t ppbus_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, ppbus_probe),
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DEVMETHOD(device_attach, ppbus_attach),
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/* bus interface */
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DEVMETHOD(bus_add_child, ppbus_add_child),
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DEVMETHOD(bus_print_child, ppbus_print_child),
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DEVMETHOD(bus_read_ivar, ppbus_read_ivar),
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DEVMETHOD(bus_write_ivar, ppbus_write_ivar),
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DEVMETHOD(bus_setup_intr, ppbus_setup_intr),
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DEVMETHOD(bus_teardown_intr, ppbus_teardown_intr),
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DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
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{ 0, 0 }
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};
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static driver_t ppbus_driver = {
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"ppbus",
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ppbus_methods,
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sizeof(struct ppb_data),
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};
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DRIVER_MODULE(ppbus, ppc, ppbus_driver, ppbus_devclass, 0, 0);
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