projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * linux/drivers/video/dummycon.c -- A dummy console driver | |
| 3 | * | |
| 4 | * To be used if there's no other console driver (e.g. for plain VGA text) | |
| 5 | * available, usually until fbcon takes console over. | |
| 6 | */ | |
| 7 | ||
| 8 | #include <linux/types.h> | |
| 9 | #include <linux/kdev_t.h> | |
| 1da177e4 LT |
10 | #include <linux/console.h> |
| 11 | #include <linux/vt_kern.h> | |
| 894673ee | 12 | #include <linux/screen_info.h> |
| 1da177e4 LT |
13 | #include <linux/init.h> |
| 14 | #include <linux/module.h> | |
| 15 | ||
| 16 | /* | |
| 17 | * Dummy console driver | |
| 18 | */ | |
| 19 | ||
| 20 | #if defined(__arm__) | |
| 3ea33510 PA |
21 | #define DUMMY_COLUMNS screen_info.orig_video_cols |
| 22 | #define DUMMY_ROWS screen_info.orig_video_lines | |
| 8f5b1e65 | 23 | #else |
| 1da177e4 | 24 | /* set by Kconfig. Use 80x25 for 640x480 and 160x64 for 1280x1024 */ |
| 1da177e4 LT |
25 | #define DUMMY_COLUMNS CONFIG_DUMMY_CONSOLE_COLUMNS |
| 26 | #define DUMMY_ROWS CONFIG_DUMMY_CONSOLE_ROWS | |
| 1da177e4 LT |
27 | #endif |
| 28 | ||
| 29 | static const char *dummycon_startup(void) | |
| 30 | { | |
| 31 | return "dummy device"; | |
| 32 | } | |
| 33 | ||
| 34 | static void dummycon_init(struct vc_data *vc, int init) | |
| 35 | { | |
| 36 | vc->vc_can_do_color = 1; | |
| 37 | if (init) { | |
| 38 | vc->vc_cols = DUMMY_COLUMNS; | |
| 39 | vc->vc_rows = DUMMY_ROWS; | |
| 40 | } else | |
| 41 | vc_resize(vc, DUMMY_COLUMNS, DUMMY_ROWS); | |
| 42 | } | |
| 43 | ||
| 44 | static int dummycon_dummy(void) | |
| 45 | { | |
| 46 | return 0; | |
| 47 | } | |
| 48 | ||
| 49 | #define DUMMY (void *)dummycon_dummy | |
| 50 | ||
| 51 | /* | |
| 52 | * The console `switch' structure for the dummy console | |
| 53 | * | |
| 54 | * Most of the operations are dummies. | |
| 55 | */ | |
| 56 | ||
| 57 | const struct consw dummy_con = { | |
| 58 | .owner = THIS_MODULE, | |
| 59 | .con_startup = dummycon_startup, | |
| 60 | .con_init = dummycon_init, | |
| 61 | .con_deinit = DUMMY, | |
| 62 | .con_clear = DUMMY, | |
| 63 | .con_putc = DUMMY, | |
| 64 | .con_putcs = DUMMY, | |
| 65 | .con_cursor = DUMMY, | |
| 66 | .con_scroll = DUMMY, | |
| 67 | .con_bmove = DUMMY, | |
| 68 | .con_switch = DUMMY, | |
| 69 | .con_blank = DUMMY, | |
| 70 | .con_font_set = DUMMY, | |
| 71 | .con_font_get = DUMMY, | |
| 72 | .con_font_default = DUMMY, | |
| 73 | .con_font_copy = DUMMY, | |
| 74 | .con_set_palette = DUMMY, | |
| 75 | .con_scrolldelta = DUMMY, | |
| 76 | }; | |
| a4de0526 | 77 | EXPORT_SYMBOL_GPL(dummy_con); |