sys/dev/cardbus/cardbus_device.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause
   3  *
   4  * Copyright (c) 2005-2008 M. Warner Losh <imp@FreeBSD.org>
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice unmodified, this list of conditions, and the following
  11  *    disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  */
  29
  30 #include <sys/param.h>
  31 #include <sys/conf.h>
  32 #include <sys/malloc.h>
  33 #include <sys/systm.h>
  34 #include <sys/uio.h>
  35
  36 #include <sys/bus.h>
  37 #include <machine/bus.h>
  38 #include <sys/rman.h>
  39 #include <machine/resource.h>
  40
  41 #include <sys/pciio.h>
  42 #include <dev/pci/pcivar.h>
  43 #include <dev/pci/pcireg.h>
  44 #include <dev/pci/pci_private.h>
  45
  46 #include <dev/cardbus/cardbusreg.h>
  47 #include <dev/cardbus/cardbusvar.h>
  48 #include <dev/cardbus/cardbus_cis.h>
  49 #include <dev/pccard/pccard_cis.h>
  50
  51 static  d_open_t        cardbus_open;
  52 static  d_close_t       cardbus_close;
  53 static  d_read_t        cardbus_read;
  54 static  d_ioctl_t       cardbus_ioctl;
  55
  56 static struct cdevsw cardbus_cdevsw = {
  57         .d_version =    D_VERSION,
  58         .d_open =       cardbus_open,
  59         .d_close =      cardbus_close,
  60         .d_read =       cardbus_read,
  61         .d_ioctl =      cardbus_ioctl,
  62         .d_name =       "cardbus"
  63 };
  64
  65 static int
  66 cardbus_build_cis(device_t cbdev, device_t child, int id,
  67     int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
  68     struct tuple_callbacks *info, void *argp)
  69 {
  70         struct cis_buffer *cis;
  71         int i;
  72
  73         cis = (struct cis_buffer *)argp;
  74         /*
  75          * CISTPL_END is a special case, it has no length field.
  76          */
  77         if (id == CISTPL_END) {
  78                 if (cis->len + 1 > sizeof(cis->buffer)) {
  79                         cis->len = 0;
  80                         return (ENOSPC);
  81                 }
  82                 cis->buffer[cis->len++] = id;
  83                 return (0);
  84         }
  85         if (cis->len + 2 + len > sizeof(cis->buffer)) {
  86                 cis->len = 0;
  87                 return (ENOSPC);
  88         }
  89         cis->buffer[cis->len++] = id;
  90         cis->buffer[cis->len++] = len;
  91         for (i = 0; i < len; i++)
  92                 cis->buffer[cis->len++] = tupledata[i];
  93         return (0);
  94 }
  95
  96 static int
  97 cardbus_device_buffer_cis(device_t parent, device_t child,
  98     struct cis_buffer *cbp)
  99 {
 100         struct tuple_callbacks cb[] = {
 101                 {CISTPL_GENERIC, "GENERIC", cardbus_build_cis}
 102         };
 103
 104         return (cardbus_parse_cis(parent, child, cb, cbp));
 105 }
 106
 107 int
 108 cardbus_device_create(struct cardbus_softc *sc, struct cardbus_devinfo *devi,
 109     device_t parent, device_t child)
 110 {
 111         uint32_t minor;
 112         int unit;
 113
 114         cardbus_device_buffer_cis(parent, child, &devi->sc_cis);
 115         minor = (device_get_unit(sc->sc_dev) << 8) + devi->pci.cfg.func;
 116         unit = device_get_unit(sc->sc_dev);
 117         devi->sc_cisdev = make_dev(&cardbus_cdevsw, minor, 0, 0, 0666,
 118             "cardbus%d.%d.cis", unit, devi->pci.cfg.func);
 119         if (devi->pci.cfg.func == 0)
 120                 make_dev_alias(devi->sc_cisdev, "cardbus%d.cis", unit);
 121         devi->sc_cisdev->si_drv1 = devi;
 122         return (0);
 123 }
 124
 125 int
 126 cardbus_device_destroy(struct cardbus_devinfo *devi)
 127 {
 128         if (devi->sc_cisdev)
 129                 destroy_dev(devi->sc_cisdev);
 130         return (0);
 131 }
 132
 133 static  int
 134 cardbus_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
 135 {
 136
 137         return (0);
 138 }
 139
 140 static  int
 141 cardbus_close(struct cdev *dev, int fflags, int devtype, struct thread *td)
 142 {
 143
 144         return (0);
 145 }
 146
 147 static  int
 148 cardbus_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
 149     struct thread *td)
 150 {
 151         return (ENOTTY);
 152 }
 153
 154 static  int
 155 cardbus_read(struct cdev *dev, struct uio *uio, int ioflag)
 156 {
 157         struct cardbus_devinfo *devi;
 158
 159         devi = dev->si_drv1;
 160         /* EOF */
 161         if (uio->uio_offset >= devi->sc_cis.len)
 162                 return (0);
 163         return (uiomove(devi->sc_cis.buffer + uio->uio_offset,
 164           MIN(uio->uio_resid, devi->sc_cis.len - uio->uio_offset), uio));
 165 }