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/*

 *  linux/drivers/video/dummycon.c -- A dummy console driver

 *

 *  To be used if there's no other console driver (e.g. for plain VGA text)

 *  available, usually until fbcon takes console over.

 */

#include <linux/types.h>

#include <linux/kdev_t.h>

#include <linux/console.h>

#include <linux/vt_kern.h>

#include <linux/screen_info.h>

#include <linux/init.h>

#include <linux/module.h>

/*

 *  Dummy console driver

 */

#if defined(__arm__)

#define DUMMY_COLUMNS   screen_info.orig_video_cols

#define DUMMY_ROWS      screen_info.orig_video_lines

#elif defined(__hppa__)

/* set by Kconfig. Use 80x25 for 640x480 and 160x64 for 1280x1024 */

#define DUMMY_COLUMNS   CONFIG_DUMMY_CONSOLE_COLUMNS

#define DUMMY_ROWS      CONFIG_DUMMY_CONSOLE_ROWS

#else

#define DUMMY_COLUMNS   80

#define DUMMY_ROWS      25

#endif

static const char *dummycon_startup(void)

{

    return "dummy device";

}

static void dummycon_init(struct vc_data *vc, int init)

{

    vc->vc_can_do_color = 1;

    if (init) {

        vc->vc_cols = DUMMY_COLUMNS;

        vc->vc_rows = DUMMY_ROWS;

    } else

        vc_resize(vc, DUMMY_COLUMNS, DUMMY_ROWS);

}

static int dummycon_dummy(void)

{

    return 0;

}

#define DUMMY   (void *)dummycon_dummy

/*

 *  The console `switch' structure for the dummy console

 *

 *  Most of the operations are dummies.

 */

const struct consw dummy_con = {

    .owner =            THIS_MODULE,

    .con_startup =      dummycon_startup,

    .con_init =         dummycon_init,

    .con_deinit =       DUMMY,

    .con_clear =        DUMMY,

    .con_putc =         DUMMY,

    .con_putcs =        DUMMY,

    .con_cursor =       DUMMY,

    .con_scroll =       DUMMY,

    .con_bmove =        DUMMY,

    .con_switch =       DUMMY,

    .con_blank =        DUMMY,

    .con_font_set =     DUMMY,

    .con_font_get =     DUMMY,

    .con_font_default = DUMMY,

    .con_font_copy =    DUMMY,

    .con_set_palette =  DUMMY,

    .con_scrolldelta =  DUMMY,

};