fb.c

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    1 /*-
    2  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
    3  * 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 as
   10  *    the first lines of this file unmodified.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. The name of the author may not be used to endorse or promote products
   15  *    derived from this software without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  * $FreeBSD$
   29  */
   30 
   31 #include "fb.h"
   32 #include "opt_fb.h"
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/conf.h>
   37 #include <sys/kernel.h>
   38 #include <sys/malloc.h>
   39 
   40 #include <machine/console.h>
   41 
   42 #include <dev/fb/fbreg.h>
   43 
   44 /* local arrays */
   45 
   46 /*
   47  * We need at least one entry each in order to initialize a video card
   48  * for the kernel console.  The arrays will be increased dynamically
   49  * when necessary.
   50  */
   51 
   52 static int              adapters = 1;
   53 static video_adapter_t  *adp_ini;
   54 static video_adapter_t  **adapter = &adp_ini;
   55 static video_switch_t   *vidsw_ini;
   56        video_switch_t   **vidsw = &vidsw_ini;
   57 
   58 #ifdef FB_INSTALL_CDEV
   59 
   60 #define ARRAY_DELTA     4
   61 
   62 static struct cdevsw    *vidcdevsw_ini;
   63 static struct cdevsw    **vidcdevsw = &vidcdevsw_ini;
   64 
   65 static void
   66 vid_realloc_array(void)
   67 {
   68         video_adapter_t **new_adp;
   69         video_switch_t **new_vidsw;
   70         struct cdevsw **new_cdevsw;
   71         int newsize;
   72         int s;
   73 
   74         s = spltty();
   75         newsize = ((adapters + ARRAY_DELTA)/ARRAY_DELTA)*ARRAY_DELTA;
   76         new_adp = malloc(sizeof(*new_adp)*newsize, M_DEVBUF, M_WAITOK);
   77         new_vidsw = malloc(sizeof(*new_vidsw)*newsize, M_DEVBUF, M_WAITOK);
   78         new_cdevsw = malloc(sizeof(*new_cdevsw)*newsize, M_DEVBUF, M_WAITOK);
   79         bzero(new_adp, sizeof(*new_adp)*newsize);
   80         bzero(new_vidsw, sizeof(*new_vidsw)*newsize);
   81         bzero(new_cdevsw, sizeof(*new_cdevsw)*newsize);
   82         bcopy(adapter, new_adp, sizeof(*adapter)*adapters);
   83         bcopy(vidsw, new_vidsw, sizeof(*vidsw)*adapters);
   84         bcopy(vidcdevsw, new_cdevsw, sizeof(*vidcdevsw)*adapters);
   85         if (adapters > 1) {
   86                 free(adapter, M_DEVBUF);
   87                 free(vidsw, M_DEVBUF);
   88                 free(vidcdevsw, M_DEVBUF);
   89         }
   90         adapter = new_adp;
   91         vidsw = new_vidsw;
   92         vidcdevsw = new_cdevsw;
   93         adapters = newsize;
   94         splx(s);
   95 
   96         if (bootverbose)
   97                 printf("fb: new array size %d\n", adapters);
   98 }
   99 
  100 #endif /* FB_INSTALL_CDEV */
  101 
  102 /*
  103  * Low-level frame buffer driver functions
  104  * frame buffer subdrivers, such as the VGA driver, call these functions
  105  * to initialize the video_adapter structure and register it to the virtual
  106  * frame buffer driver `fb'.
  107  */
  108 
  109 /* initialize the video_adapter_t structure */
  110 void
  111 vid_init_struct(video_adapter_t *adp, char *name, int type, int unit)
  112 {
  113         adp->va_flags = 0;
  114         adp->va_name = name;
  115         adp->va_type = type;
  116         adp->va_unit = unit;
  117 }
  118 
  119 /* Register a video adapter */
  120 int
  121 vid_register(video_adapter_t *adp)
  122 {
  123         video_driver_t **list;
  124         video_driver_t *p;
  125         int index;
  126 
  127         for (index = 0; index < adapters; ++index) {
  128                 if (adapter[index] == NULL)
  129                         break;
  130         }
  131         if (index >= adapters)
  132                 return -1;
  133 
  134         adp->va_index = index;
  135         adp->va_token = NULL;
  136         list = (video_driver_t **)videodriver_set.ls_items;
  137         while ((p = *list++) != NULL) {
  138                 if (strcmp(p->name, adp->va_name) == 0) {
  139                         adapter[index] = adp;
  140                         vidsw[index] = p->vidsw;
  141                         return index;
  142                 }
  143         }
  144 
  145         return -1;
  146 }
  147 
  148 int
  149 vid_unregister(video_adapter_t *adp)
  150 {
  151         if ((adp->va_index < 0) || (adp->va_index >= adapters))
  152                 return ENOENT;
  153         if (adapter[adp->va_index] != adp)
  154                 return ENOENT;
  155 
  156         adapter[adp->va_index] = NULL;
  157         vidsw[adp->va_index] = NULL;
  158         return 0;
  159 }
  160 
  161 /* Get video I/O function table */
  162 video_switch_t
  163 *vid_get_switch(char *name)
  164 {
  165         video_driver_t **list;
  166         video_driver_t *p;
  167 
  168         list = (video_driver_t **)videodriver_set.ls_items;
  169         while ((p = *list++) != NULL) {
  170                 if (strcmp(p->name, name) == 0)
  171                         return p->vidsw;
  172         }
  173 
  174         return NULL;
  175 }
  176 
  177 /*
  178  * Video card client functions
  179  * Video card clients, such as the console driver `syscons' and the frame
  180  * buffer cdev driver, use these functions to claim and release a card for
  181  * exclusive use.
  182  */
  183 
  184 /* find the video card specified by a driver name and a unit number */
  185 int
  186 vid_find_adapter(char *driver, int unit)
  187 {
  188         int i;
  189 
  190         for (i = 0; i < adapters; ++i) {
  191                 if (adapter[i] == NULL)
  192                         continue;
  193                 if (strcmp("*", driver) && strcmp(adapter[i]->va_name, driver))
  194                         continue;
  195                 if ((unit != -1) && (adapter[i]->va_unit != unit))
  196                         continue;
  197                 return i;
  198         }
  199         return -1;
  200 }
  201 
  202 /* allocate a video card */
  203 int
  204 vid_allocate(char *driver, int unit, void *id)
  205 {
  206         int index;
  207         int s;
  208 
  209         s = spltty();
  210         index = vid_find_adapter(driver, unit);
  211         if (index >= 0) {
  212                 if (adapter[index]->va_token) {
  213                         splx(s);
  214                         return -1;
  215                 }
  216                 adapter[index]->va_token = id;
  217         }
  218         splx(s);
  219         return index;
  220 }
  221 
  222 int
  223 vid_release(video_adapter_t *adp, void *id)
  224 {
  225         int error;
  226         int s;
  227 
  228         s = spltty();
  229         if (adp->va_token == NULL) {
  230                 error = EINVAL;
  231         } else if (adp->va_token != id) {
  232                 error = EPERM;
  233         } else {
  234                 adp->va_token = NULL;
  235                 error = 0;
  236         }
  237         splx(s);
  238         return error;
  239 }
  240 
  241 /* Get a video adapter structure */
  242 video_adapter_t
  243 *vid_get_adapter(int index)
  244 {
  245         if ((index < 0) || (index >= adapters))
  246                 return NULL;
  247         return adapter[index];
  248 }
  249 
  250 /* Configure drivers: this is a backdoor for the console driver XXX */
  251 int
  252 vid_configure(int flags)
  253 {
  254         video_driver_t **list;
  255         video_driver_t *p;
  256 
  257         list = (video_driver_t **)videodriver_set.ls_items;
  258         while ((p = *list++) != NULL) {
  259                 if (p->configure != NULL)
  260                         (*p->configure)(flags);
  261         }
  262 
  263         return 0;
  264 }
  265 
  266 /*
  267  * Virtual frame buffer cdev driver functions
  268  * The virtual frame buffer driver dispatches driver functions to
  269  * appropriate subdrivers.
  270  */
  271 
  272 #define DRIVER_NAME     "fb"
  273 
  274 #ifdef FB_INSTALL_CDEV
  275 
  276 #define FB_UNIT(dev)    minor(dev)
  277 #define FB_MKMINOR(unit) (u)
  278 
  279 #if notyet
  280 
  281 static d_open_t         fbopen;
  282 static d_close_t        fbclose;
  283 static d_ioctl_t        fbioctl;
  284 static d_mmap_t         fbmmap;
  285 
  286 #define CDEV_MAJOR      141     /* XXX */
  287 
  288 static struct cdevsw fb_cdevsw = {
  289         fbopen,         fbclose,        noread,         nowrite,   /* ??? */
  290         fbioctl,        nostop,         nullreset,      nodevtotty,
  291         seltrue,        fbmmap,         NULL,           DRIVER_NAME,
  292         NULL,           -1,             nodump,         nopsize,
  293 };
  294 
  295 static void
  296 vfbattach(void *arg)
  297 {
  298         static int fb_devsw_installed = FALSE;
  299         dev_t dev;
  300 
  301         if (!fb_devsw_installed) {
  302                 dev = makedev(CDEV_MAJOR, 0);
  303                 cdevsw_add(&dev, &fb_cdevsw, NULL);
  304                 fb_devsw_installed = TRUE;
  305         }
  306 }
  307 
  308 PSEUDO_SET(vfbattach, fb);
  309 
  310 #endif /* notyet */
  311 
  312 int
  313 fb_attach(dev_t dev, video_adapter *adp, struct cdevsw *cdevsw)
  314 {
  315         int s;
  316 
  317         if (adp->va_index >= adapters)
  318                 return EINVAL;
  319         if (adapter[adp->va_index] != adp)
  320                 return EINVAL;
  321 
  322         s = spltty();
  323         adp->va_minor = minor(dev);
  324         vidcdevsw[adp->va_index] = cdevsw;
  325         splx(s);
  326 
  327         /* XXX: DEVFS? */
  328 
  329         if (adp->va_index + 1 >= adapters)
  330                 vid_realloc_array();
  331 
  332         printf("fb%d at %s%d\n", adp->va_index, adp->va_name, adp->va_unit);
  333         return 0;
  334 }
  335 
  336 int
  337 fb_detach(dev_t dev, video_adapter *adp, struct cdevsw *cdevsw)
  338 {
  339         int s;
  340 
  341         if (adp->va_index >= adapters)
  342                 return EINVAL;
  343         if (adapter[adp->va_index] != adp)
  344                 return EINVAL;
  345         if (vidcdevsw[adp->va_index] != cdevsw)
  346                 return EINVAL;
  347 
  348         s = spltty();
  349         vidcdevsw[adp->va_index] = NULL;
  350         splx(s);
  351         return 0;
  352 }
  353 
  354 #endif /* FB_INSTALL_CDEV */
  355 
  356 static char
  357 *adapter_name(int type)
  358 {
  359     static struct {
  360         int type;
  361         char *name;
  362     } names[] = {
  363         { KD_MONO,      "MDA" },
  364         { KD_HERCULES,  "Hercules" },
  365         { KD_CGA,       "CGA" },
  366         { KD_EGA,       "EGA" },
  367         { KD_VGA,       "VGA" },
  368         { KD_PC98,      "PC-98x1" },
  369         { -1,           "Unknown" },
  370     };
  371     int i;
  372 
  373     for (i = 0; names[i].type != -1; ++i)
  374         if (names[i].type == type)
  375             break;
  376     return names[i].name;
  377 }
  378 
  379 void
  380 fb_dump_adp_info(char *driver, video_adapter_t *adp, int level)
  381 {
  382     if (level <= 0)
  383         return;
  384 
  385     printf("%s%d: %s%d, %s, type:%s (%d), flags:0x%x\n", 
  386            DRIVER_NAME, adp->va_index, driver, adp->va_unit, adp->va_name,
  387            adapter_name(adp->va_type), adp->va_type, adp->va_flags);
  388     printf("%s%d: port:0x%x-0x%x, crtc:0x%x, mem:0x%x 0x%x\n",
  389            DRIVER_NAME, adp->va_index,
  390            adp->va_io_base, adp->va_io_base + adp->va_io_size - 1,
  391            adp->va_crtc_addr, adp->va_mem_base, adp->va_mem_size);
  392     printf("%s%d: init mode:%d, bios mode:%d, current mode:%d\n",
  393            DRIVER_NAME, adp->va_index,
  394            adp->va_initial_mode, adp->va_initial_bios_mode, adp->va_mode);
  395     printf("%s%d: window:0x%x size:%dk gran:%dk, buf:0x%x size:%dk\n",
  396            DRIVER_NAME, adp->va_index, 
  397            adp->va_window, (int)adp->va_window_size/1024,
  398            (int)adp->va_window_gran/1024, adp->va_buffer,
  399            (int)adp->va_buffer_size/1024);
  400 }
  401 
  402 void
  403 fb_dump_mode_info(char *driver, video_adapter_t *adp, video_info_t *info,
  404                   int level)
  405 {
  406     if (level <= 0)
  407         return;
  408 
  409     printf("%s%d: %s, mode:%d, flags:0x%x ", 
  410            driver, adp->va_unit, adp->va_name, info->vi_mode, info->vi_flags);
  411     if (info->vi_flags & V_INFO_GRAPHICS)
  412         printf("G %dx%dx%d, %d plane(s), font:%dx%d, ",
  413                info->vi_width, info->vi_height, 
  414                info->vi_depth, info->vi_planes, 
  415                info->vi_cwidth, info->vi_cheight); 
  416     else
  417         printf("T %dx%d, font:%dx%d, ",
  418                info->vi_width, info->vi_height, 
  419                info->vi_cwidth, info->vi_cheight); 
  420     printf("win:0x%x\n", info->vi_window);
  421 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/fb/fb.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/fb/fb.c
