dummycon.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:2k
- /*
- * 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__)
- #define DUMMY_COLUMNS 80 /* fixme ! (mine uses 160x64 at 1280x1024) */
- #define DUMMY_ROWS 25
- #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,
- };