sys/dev/misc/dcons/dcons_crom.c

   1 /*
   2  * Copyright (C) 2003
   3  *      Hidetoshi Shimokawa. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *
  16  *      This product includes software developed by Hidetoshi Shimokawa.
  17  *
  18  * 4. Neither the name of the author nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $Id: dcons_crom.c,v 1.8 2003/10/23 15:47:21 simokawa Exp $
  35  * $FreeBSD: src/sys/dev/dcons/dcons_crom.c,v 1.5 2004/10/13 05:38:42 simokawa Exp $
  36  * $DragonFly: src/sys/dev/misc/dcons/dcons_crom.c,v 1.5 2006/12/23 00:26:17 swildner Exp $
  37  */
  38
  39 #include <sys/param.h>
  40 #include <sys/kernel.h>
  41 #include <sys/module.h>
  42 #include <sys/systm.h>
  43 #include <sys/types.h>
  44 #include <sys/conf.h>
  45 #include <sys/malloc.h>
  46 #include <sys/bus.h>
  47
  48 #ifdef __DragonFly__
  49 #include <bus/firewire/firewire.h>
  50 #include <bus/firewire/firewirereg.h>
  51 #include <bus/firewire/iec13213.h>
  52 #include "dcons.h"
  53 #include "dcons_os.h"
  54 #else
  55 #include <dev/firewire/firewire.h>
  56 #include <dev/firewire/firewirereg.h>
  57 #include <dev/firewire/iec13213.h>
  58 #include <dev/dcons/dcons.h>
  59 #include <dev/dcons/dcons_os.h>
  60 #endif
  61
  62 #include <sys/cons.h>
  63
  64 static bus_addr_t dcons_paddr;
  65
  66 #if __FreeBSD_version >= 500000
  67 static int force_console = 1;
  68 TUNABLE_INT("hw.firewire.dcons_crom.force_console", &force_console);
  69 #endif
  70
  71 #ifndef CSRVAL_VENDOR_PRIVATE
  72 #define NEED_NEW_DRIVER
  73 #endif
  74
  75 #define ADDR_HI(x)      (((x) >> 24) & 0xffffff)
  76 #define ADDR_LO(x)      ((x) & 0xffffff)
  77
  78 struct dcons_crom_softc {
  79         struct firewire_dev_comm fd;
  80         struct crom_chunk unit;
  81         struct crom_chunk spec;
  82         struct crom_chunk ver;
  83         bus_dma_tag_t dma_tag;
  84         bus_dmamap_t dma_map;
  85         bus_addr_t bus_addr;
  86 };
  87
  88 static int
  89 dcons_crom_probe(device_t dev)
  90 {
  91         device_t pa;
  92
  93         pa = device_get_parent(dev);
  94         if(device_get_unit(dev) != device_get_unit(pa)){
  95                 return(ENXIO);
  96         }
  97
  98         device_set_desc(dev, "dcons configuration ROM");
  99         return (0);
 100 }
 101
 102 #ifndef NEED_NEW_DRIVER
 103 static void
 104 dcons_crom_post_busreset(void *arg)
 105 {
 106         struct dcons_crom_softc *sc;
 107         struct crom_src *src;
 108         struct crom_chunk *root;
 109
 110         sc = (struct dcons_crom_softc *) arg;
 111         src = sc->fd.fc->crom_src;
 112         root = sc->fd.fc->crom_root;
 113
 114         bzero(&sc->unit, sizeof(struct crom_chunk));
 115
 116         crom_add_chunk(src, root, &sc->unit, CROM_UDIR);
 117         crom_add_entry(&sc->unit, CSRKEY_SPEC, CSRVAL_VENDOR_PRIVATE);
 118         crom_add_simple_text(src, &sc->unit, &sc->spec, "FreeBSD");
 119         crom_add_entry(&sc->unit, CSRKEY_VER, DCONS_CSR_VAL_VER);
 120         crom_add_simple_text(src, &sc->unit, &sc->ver, "dcons");
 121         crom_add_entry(&sc->unit, DCONS_CSR_KEY_HI, ADDR_HI(dcons_paddr));
 122         crom_add_entry(&sc->unit, DCONS_CSR_KEY_LO, ADDR_LO(dcons_paddr));
 123 }
 124 #endif
 125
 126 static void
 127 dmamap_cb(void *arg, bus_dma_segment_t *segments, int seg, int error)
 128 {
 129         struct dcons_crom_softc *sc;
 130
 131         if (error)
 132                 kprintf("dcons_dmamap_cb: error=%d\n", error);
 133
 134         sc = (struct dcons_crom_softc *)arg;
 135         sc->bus_addr = segments[0].ds_addr;
 136
 137         bus_dmamap_sync(sc->dma_tag, sc->dma_map, BUS_DMASYNC_PREWRITE);
 138         device_printf(sc->fd.dev,
 139 #if __FreeBSD_version < 500000
 140             "bus_addr 0x%x\n", sc->bus_addr);
 141 #else
 142             "bus_addr 0x%jx\n", (uintmax_t)sc->bus_addr);
 143 #endif
 144         if (dcons_paddr != 0) {
 145                 /* XXX */
 146                 device_printf(sc->fd.dev, "dcons_paddr is already set\n");
 147                 return;
 148         }
 149         dcons_conf->dma_tag = sc->dma_tag;
 150         dcons_conf->dma_map = sc->dma_map;
 151         dcons_paddr = sc->bus_addr;
 152
 153 #if __FreeBSD_version >= 500000
 154         /* Force to be the high-level console */
 155         if (force_console)
 156                 cnselect(dcons_conf->cdev);
 157 #endif
 158 }
 159
 160 static int
 161 dcons_crom_attach(device_t dev)
 162 {
 163 #ifdef NEED_NEW_DRIVER
 164         kprintf("dcons_crom: you need newer firewire driver\n");
 165         return (-1);
 166 #else
 167         struct dcons_crom_softc *sc;
 168
 169         sc = (struct dcons_crom_softc *) device_get_softc(dev);
 170         sc->fd.fc = device_get_ivars(dev);
 171         sc->fd.dev = dev;
 172         sc->fd.post_explore = NULL;
 173         sc->fd.post_busreset = (void *) dcons_crom_post_busreset;
 174
 175         /* map dcons buffer */
 176         bus_dma_tag_create(
 177                 /*parent*/ sc->fd.fc->dmat,
 178                 /*alignment*/ sizeof(u_int32_t),
 179                 /*boundary*/ 0,
 180                 /*lowaddr*/ BUS_SPACE_MAXADDR,
 181                 /*highaddr*/ BUS_SPACE_MAXADDR,
 182                 /*filter*/NULL, /*filterarg*/NULL,
 183                 /*maxsize*/ dcons_conf->size,
 184                 /*nsegments*/ 1,
 185                 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
 186                 /*flags*/ BUS_DMA_ALLOCNOW,
 187 #if __FreeBSD_version >= 501102
 188                 /*lockfunc*/busdma_lock_mutex,
 189                 /*lockarg*/&Giant,
 190 #endif
 191                 &sc->dma_tag);
 192         bus_dmamap_create(sc->dma_tag, 0, &sc->dma_map);
 193         bus_dmamap_load(sc->dma_tag, sc->dma_map,
 194             (void *)dcons_conf->buf, dcons_conf->size,
 195             dmamap_cb, sc, 0);
 196         return (0);
 197 #endif
 198 }
 199
 200 static int
 201 dcons_crom_detach(device_t dev)
 202 {
 203         struct dcons_crom_softc *sc;
 204
 205         sc = (struct dcons_crom_softc *) device_get_softc(dev);
 206         sc->fd.post_busreset = NULL;
 207
 208         /* XXX */
 209         if (dcons_conf->dma_tag == sc->dma_tag)
 210                 dcons_conf->dma_tag = NULL;
 211
 212         bus_dmamap_unload(sc->dma_tag, sc->dma_map);
 213         bus_dmamap_destroy(sc->dma_tag, sc->dma_map);
 214         bus_dma_tag_destroy(sc->dma_tag);
 215
 216         return 0;
 217 }
 218
 219 /*
 220  * Because dcons_crom is a static device that always exists under any attached
 221  * firewire device, and not scanned by the firewire device, we need an
 222  * identify function to install the device.  For our sanity we want
 223  * the sbp device to have the same unit number as the fireweire device.
 224  */
 225 static devclass_t dcons_crom_devclass;
 226
 227 static device_method_t dcons_crom_methods[] = {
 228         /* device interface */
 229         DEVMETHOD(device_identify,      bus_generic_identify_sameunit),
 230         DEVMETHOD(device_probe,         dcons_crom_probe),
 231         DEVMETHOD(device_attach,        dcons_crom_attach),
 232         DEVMETHOD(device_detach,        dcons_crom_detach),
 233         { 0, 0 }
 234 };
 235
 236 static driver_t dcons_crom_driver = {
 237         "dcons_crom",
 238         dcons_crom_methods,
 239         sizeof(struct dcons_crom_softc),
 240 };
 241
 242 DRIVER_MODULE(dcons_crom, firewire, dcons_crom_driver,
 243                                         dcons_crom_devclass, 0, 0);
 244 MODULE_VERSION(dcons_crom, 1);
 245 MODULE_DEPEND(dcons_crom, dcons,
 246         DCONS_VERSION, DCONS_VERSION, DCONS_VERSION);
 247 MODULE_DEPEND(dcons_crom, firewire, 1, 1, 1);