116 lines
2.5 KiB
C
116 lines
2.5 KiB
C
/*
|
|
* 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
|
|
#else
|
|
/* 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
|
|
#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 void dummycon_deinit(struct vc_data *vc)
|
|
{
|
|
}
|
|
|
|
static void dummycon_clear(struct vc_data *vc, int a, int b, int c, int d)
|
|
{
|
|
}
|
|
|
|
static void dummycon_putc(struct vc_data *vc, int a, int b, int c)
|
|
{
|
|
}
|
|
|
|
static void dummycon_putcs(struct vc_data *vc, const unsigned short *s, int a, int b, int c)
|
|
{
|
|
}
|
|
|
|
static void dummycon_cursor(struct vc_data *vc, int a)
|
|
{
|
|
}
|
|
|
|
static int dummycon_scroll(struct vc_data *vc, int a, int b, int c, int d)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummycon_switch(struct vc_data *vc)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummycon_blank(struct vc_data *vc, int a, int b)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummycon_font_set(struct vc_data *vc, struct console_font *f, unsigned u)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummycon_font_default(struct vc_data *vc, struct console_font *f, char *c)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummycon_font_copy(struct vc_data *vc, int a)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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 = dummycon_deinit,
|
|
.con_clear = dummycon_clear,
|
|
.con_putc = dummycon_putc,
|
|
.con_putcs = dummycon_putcs,
|
|
.con_cursor = dummycon_cursor,
|
|
.con_scroll = dummycon_scroll,
|
|
.con_switch = dummycon_switch,
|
|
.con_blank = dummycon_blank,
|
|
.con_font_set = dummycon_font_set,
|
|
.con_font_default = dummycon_font_default,
|
|
.con_font_copy = dummycon_font_copy,
|
|
};
|
|
EXPORT_SYMBOL_GPL(dummy_con);
|