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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/tty.h>
#include <linux/console.h>
#include <linux/console_struct.h>
#include <linux/vt_kern.h>
#include <linux/init.h>
/*
* Dummy console driver
*/
#if defined(__arm__)
#define DUMMY_COLUMNS ORIG_VIDEO_COLS
#define DUMMY_ROWS ORIG_VIDEO_LINES
#elif defined(__hppa__)
#warning "FIXME: vc_resize() in console.c seems to have problems downsampling a console"
/* until this is fixed or I have more clue about it you may enter here the columns/rows
* for your screen or you will loose most of the bootup-messages on a STI console
* (which isn't really a serious problem).
* Values: 160x64 for a 1280x1024, 200x150 for a 1600x1200 screen.
*/
#define DUMMY_COLUMNS 160 /* Maximum initial screensize */
#define DUMMY_ROWS 64 /* FIXME: 1280x1024 -> 160x64, 1600x1200 -> 200x150, */
#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 *conp, int init)
{
conp->vc_can_do_color = 1;
if (init) {
conp->vc_cols = DUMMY_COLUMNS;
conp->vc_rows = DUMMY_ROWS;
} else
vc_resize_con(DUMMY_ROWS, DUMMY_COLUMNS, conp->vc_num);
}
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 = {
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_op: DUMMY,
con_set_palette: DUMMY,
con_scrolldelta: DUMMY,
};
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