| /* |
| * linux/drivers/char/vt.c |
| * |
| * Copyright (C) 1991, 1992 Linus Torvalds |
| */ |
| |
| /* |
| * Hopefully this will be a rather complete VT102 implementation. |
| * |
| * Beeping thanks to John T Kohl. |
| * |
| * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics |
| * Chars, and VT100 enhancements by Peter MacDonald. |
| * |
| * Copy and paste function by Andrew Haylett, |
| * some enhancements by Alessandro Rubini. |
| * |
| * Code to check for different video-cards mostly by Galen Hunt, |
| * <g-hunt@ee.utah.edu> |
| * |
| * Rudimentary ISO 10646/Unicode/UTF-8 character set support by |
| * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>. |
| * |
| * Dynamic allocation of consoles, aeb@cwi.nl, May 1994 |
| * Resizing of consoles, aeb, 940926 |
| * |
| * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94 |
| * <poe@daimi.aau.dk> |
| * |
| * User-defined bell sound, new setterm control sequences and printk |
| * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95 |
| * |
| * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp> |
| * |
| * Merge with the abstract console driver by Geert Uytterhoeven |
| * <geert@linux-m68k.org>, Jan 1997. |
| * |
| * Original m68k console driver modifications by |
| * |
| * - Arno Griffioen <arno@usn.nl> |
| * - David Carter <carter@cs.bris.ac.uk> |
| * |
| * The abstract console driver provides a generic interface for a text |
| * console. It supports VGA text mode, frame buffer based graphical consoles |
| * and special graphics processors that are only accessible through some |
| * registers (e.g. a TMS340x0 GSP). |
| * |
| * The interface to the hardware is specified using a special structure |
| * (struct consw) which contains function pointers to console operations |
| * (see <linux/console.h> for more information). |
| * |
| * Support for changeable cursor shape |
| * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997 |
| * |
| * Ported to i386 and con_scrolldelta fixed |
| * by Emmanuel Marty <core@ggi-project.org>, April 1998 |
| * |
| * Resurrected character buffers in videoram plus lots of other trickery |
| * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998 |
| * |
| * Removed old-style timers, introduced console_timer, made timer |
| * deletion SMP-safe. 17Jun00, Andrew Morton |
| * |
| * Removed console_lock, enabled interrupts across all console operations |
| * 13 March 2001, Andrew Morton |
| * |
| * Fixed UTF-8 mode so alternate charset modes always work according |
| * to control sequences interpreted in do_con_trol function |
| * preserving backward VT100 semigraphics compatibility, |
| * malformed UTF sequences represented as sequences of replacement glyphs, |
| * original codes or '?' as a last resort if replacement glyph is undefined |
| * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006 |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/sched.h> |
| #include <linux/tty.h> |
| #include <linux/tty_flip.h> |
| #include <linux/kernel.h> |
| #include <linux/string.h> |
| #include <linux/errno.h> |
| #include <linux/kd.h> |
| #include <linux/slab.h> |
| #include <linux/major.h> |
| #include <linux/mm.h> |
| #include <linux/console.h> |
| #include <linux/init.h> |
| #include <linux/mutex.h> |
| #include <linux/vt_kern.h> |
| #include <linux/selection.h> |
| #include <linux/smp_lock.h> |
| #include <linux/tiocl.h> |
| #include <linux/kbd_kern.h> |
| #include <linux/consolemap.h> |
| #include <linux/timer.h> |
| #include <linux/interrupt.h> |
| #include <linux/workqueue.h> |
| #include <linux/pm.h> |
| #include <linux/font.h> |
| #include <linux/bitops.h> |
| #include <linux/notifier.h> |
| #include <linux/device.h> |
| #include <linux/io.h> |
| #include <asm/system.h> |
| #include <linux/uaccess.h> |
| #include <linux/kdb.h> |
| #include <linux/ctype.h> |
| |
| #define MAX_NR_CON_DRIVER 16 |
| |
| #define CON_DRIVER_FLAG_MODULE 1 |
| #define CON_DRIVER_FLAG_INIT 2 |
| #define CON_DRIVER_FLAG_ATTR 4 |
| |
| struct con_driver { |
| const struct consw *con; |
| const char *desc; |
| struct device *dev; |
| int node; |
| int first; |
| int last; |
| int flag; |
| }; |
| |
| static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER]; |
| const struct consw *conswitchp; |
| |
| /* A bitmap for codes <32. A bit of 1 indicates that the code |
| * corresponding to that bit number invokes some special action |
| * (such as cursor movement) and should not be displayed as a |
| * glyph unless the disp_ctrl mode is explicitly enabled. |
| */ |
| #define CTRL_ACTION 0x0d00ff81 |
| #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */ |
| |
| /* |
| * Here is the default bell parameters: 750HZ, 1/8th of a second |
| */ |
| #define DEFAULT_BELL_PITCH 750 |
| #define DEFAULT_BELL_DURATION (HZ/8) |
| |
| struct vc vc_cons [MAX_NR_CONSOLES]; |
| |
| #ifndef VT_SINGLE_DRIVER |
| static const struct consw *con_driver_map[MAX_NR_CONSOLES]; |
| #endif |
| |
| static int con_open(struct tty_struct *, struct file *); |
| static void vc_init(struct vc_data *vc, unsigned int rows, |
| unsigned int cols, int do_clear); |
| static void gotoxy(struct vc_data *vc, int new_x, int new_y); |
| static void save_cur(struct vc_data *vc); |
| static void reset_terminal(struct vc_data *vc, int do_clear); |
| static void con_flush_chars(struct tty_struct *tty); |
| static int set_vesa_blanking(char __user *p); |
| static void set_cursor(struct vc_data *vc); |
| static void hide_cursor(struct vc_data *vc); |
| static void console_callback(struct work_struct *ignored); |
| static void blank_screen_t(unsigned long dummy); |
| static void set_palette(struct vc_data *vc); |
| |
| static int printable; /* Is console ready for printing? */ |
| int default_utf8 = true; |
| module_param(default_utf8, int, S_IRUGO | S_IWUSR); |
| int global_cursor_default = -1; |
| module_param(global_cursor_default, int, S_IRUGO | S_IWUSR); |
| |
| static int cur_default = CUR_DEFAULT; |
| module_param(cur_default, int, S_IRUGO | S_IWUSR); |
| |
| /* |
| * ignore_poke: don't unblank the screen when things are typed. This is |
| * mainly for the privacy of braille terminal users. |
| */ |
| static int ignore_poke; |
| |
| int do_poke_blanked_console; |
| int console_blanked; |
| |
| static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ |
| static int vesa_off_interval; |
| static int blankinterval = 10*60; |
| core_param(consoleblank, blankinterval, int, 0444); |
| |
| static DECLARE_WORK(console_work, console_callback); |
| |
| /* |
| * fg_console is the current virtual console, |
| * last_console is the last used one, |
| * want_console is the console we want to switch to, |
| * saved_* variants are for save/restore around kernel debugger enter/leave |
| */ |
| int fg_console; |
| int last_console; |
| int want_console = -1; |
| int saved_fg_console; |
| int saved_last_console; |
| int saved_want_console; |
| int saved_vc_mode; |
| |
| /* |
| * For each existing display, we have a pointer to console currently visible |
| * on that display, allowing consoles other than fg_console to be refreshed |
| * appropriately. Unless the low-level driver supplies its own display_fg |
| * variable, we use this one for the "master display". |
| */ |
| static struct vc_data *master_display_fg; |
| |
| /* |
| * Unfortunately, we need to delay tty echo when we're currently writing to the |
| * console since the code is (and always was) not re-entrant, so we schedule |
| * all flip requests to process context with schedule-task() and run it from |
| * console_callback(). |
| */ |
| |
| /* |
| * For the same reason, we defer scrollback to the console callback. |
| */ |
| static int scrollback_delta; |
| |
| /* |
| * Hook so that the power management routines can (un)blank |
| * the console on our behalf. |
| */ |
| int (*console_blank_hook)(int); |
| |
| static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0); |
| static int blank_state; |
| static int blank_timer_expired; |
| enum { |
| blank_off = 0, |
| blank_normal_wait, |
| blank_vesa_wait, |
| }; |
| |
| /* |
| * Notifier list for console events. |
| */ |
| static ATOMIC_NOTIFIER_HEAD(vt_notifier_list); |
| |
| int register_vt_notifier(struct notifier_block *nb) |
| { |
| return atomic_notifier_chain_register(&vt_notifier_list, nb); |
| } |
| EXPORT_SYMBOL_GPL(register_vt_notifier); |
| |
| int unregister_vt_notifier(struct notifier_block *nb) |
| { |
| return atomic_notifier_chain_unregister(&vt_notifier_list, nb); |
| } |
| EXPORT_SYMBOL_GPL(unregister_vt_notifier); |
| |
| static void notify_write(struct vc_data *vc, unsigned int unicode) |
| { |
| struct vt_notifier_param param = { .vc = vc, unicode = unicode }; |
| atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m); |
| } |
| |
| static void notify_update(struct vc_data *vc) |
| { |
| struct vt_notifier_param param = { .vc = vc }; |
| atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m); |
| } |
| /* |
| * Low-Level Functions |
| */ |
| |
| #define IS_FG(vc) ((vc)->vc_num == fg_console) |
| |
| #ifdef VT_BUF_VRAM_ONLY |
| #define DO_UPDATE(vc) 0 |
| #else |
| #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked) |
| #endif |
| |
| static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed) |
| { |
| unsigned short *p; |
| |
| if (!viewed) |
| p = (unsigned short *)(vc->vc_origin + offset); |
| else if (!vc->vc_sw->con_screen_pos) |
| p = (unsigned short *)(vc->vc_visible_origin + offset); |
| else |
| p = vc->vc_sw->con_screen_pos(vc, offset); |
| return p; |
| } |
| |
| /* Called from the keyboard irq path.. */ |
| static inline void scrolldelta(int lines) |
| { |
| /* FIXME */ |
| /* scrolldelta needs some kind of consistency lock, but the BKL was |
| and still is not protecting versus the scheduled back end */ |
| scrollback_delta += lines; |
| schedule_console_callback(); |
| } |
| |
| void schedule_console_callback(void) |
| { |
| schedule_work(&console_work); |
| } |
| |
| static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr) |
| { |
| unsigned short *d, *s; |
| |
| if (t+nr >= b) |
| nr = b - t - 1; |
| if (b > vc->vc_rows || t >= b || nr < 1) |
| return; |
| if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr)) |
| return; |
| d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); |
| s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr)); |
| scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); |
| scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char, |
| vc->vc_size_row * nr); |
| } |
| |
| static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr) |
| { |
| unsigned short *s; |
| unsigned int step; |
| |
| if (t+nr >= b) |
| nr = b - t - 1; |
| if (b > vc->vc_rows || t >= b || nr < 1) |
| return; |
| if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr)) |
| return; |
| s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); |
| step = vc->vc_cols * nr; |
| scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row); |
| scr_memsetw(s, vc->vc_video_erase_char, 2 * step); |
| } |
| |
| static void do_update_region(struct vc_data *vc, unsigned long start, int count) |
| { |
| #ifndef VT_BUF_VRAM_ONLY |
| unsigned int xx, yy, offset; |
| u16 *p; |
| |
| p = (u16 *) start; |
| if (!vc->vc_sw->con_getxy) { |
| offset = (start - vc->vc_origin) / 2; |
| xx = offset % vc->vc_cols; |
| yy = offset / vc->vc_cols; |
| } else { |
| int nxx, nyy; |
| start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); |
| xx = nxx; yy = nyy; |
| } |
| for(;;) { |
| u16 attrib = scr_readw(p) & 0xff00; |
| int startx = xx; |
| u16 *q = p; |
| while (xx < vc->vc_cols && count) { |
| if (attrib != (scr_readw(p) & 0xff00)) { |
| if (p > q) |
| vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); |
| startx = xx; |
| q = p; |
| attrib = scr_readw(p) & 0xff00; |
| } |
| p++; |
| xx++; |
| count--; |
| } |
| if (p > q) |
| vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); |
| if (!count) |
| break; |
| xx = 0; |
| yy++; |
| if (vc->vc_sw->con_getxy) { |
| p = (u16 *)start; |
| start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); |
| } |
| } |
| #endif |
| } |
| |
| void update_region(struct vc_data *vc, unsigned long start, int count) |
| { |
| WARN_CONSOLE_UNLOCKED(); |
| |
| if (DO_UPDATE(vc)) { |
| hide_cursor(vc); |
| do_update_region(vc, start, count); |
| set_cursor(vc); |
| } |
| } |
| |
| /* Structure of attributes is hardware-dependent */ |
| |
| static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, |
| u8 _underline, u8 _reverse, u8 _italic) |
| { |
| if (vc->vc_sw->con_build_attr) |
| return vc->vc_sw->con_build_attr(vc, _color, _intensity, |
| _blink, _underline, _reverse, _italic); |
| |
| #ifndef VT_BUF_VRAM_ONLY |
| /* |
| * ++roman: I completely changed the attribute format for monochrome |
| * mode (!can_do_color). The formerly used MDA (monochrome display |
| * adapter) format didn't allow the combination of certain effects. |
| * Now the attribute is just a bit vector: |
| * Bit 0..1: intensity (0..2) |
| * Bit 2 : underline |
| * Bit 3 : reverse |
| * Bit 7 : blink |
| */ |
| { |
| u8 a = _color; |
| if (!vc->vc_can_do_color) |
| return _intensity | |
| (_italic ? 2 : 0) | |
| (_underline ? 4 : 0) | |
| (_reverse ? 8 : 0) | |
| (_blink ? 0x80 : 0); |
| if (_italic) |
| a = (a & 0xF0) | vc->vc_itcolor; |
| else if (_underline) |
| a = (a & 0xf0) | vc->vc_ulcolor; |
| else if (_intensity == 0) |
| a = (a & 0xf0) | vc->vc_ulcolor; |
| if (_reverse) |
| a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); |
| if (_blink) |
| a ^= 0x80; |
| if (_intensity == 2) |
| a ^= 0x08; |
| if (vc->vc_hi_font_mask == 0x100) |
| a <<= 1; |
| return a; |
| } |
| #else |
| return 0; |
| #endif |
| } |
| |
| static void update_attr(struct vc_data *vc) |
| { |
| vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, |
| vc->vc_blink, vc->vc_underline, |
| vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); |
| vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; |
| } |
| |
| /* Note: inverting the screen twice should revert to the original state */ |
| void invert_screen(struct vc_data *vc, int offset, int count, int viewed) |
| { |
| unsigned short *p; |
| |
| WARN_CONSOLE_UNLOCKED(); |
| |
| count /= 2; |
| p = screenpos(vc, offset, viewed); |
| if (vc->vc_sw->con_invert_region) |
| vc->vc_sw->con_invert_region(vc, p, count); |
| #ifndef VT_BUF_VRAM_ONLY |
| else { |
| u16 *q = p; |
| int cnt = count; |
| u16 a; |
| |
| if (!vc->vc_can_do_color) { |
| while (cnt--) { |
| a = scr_readw(q); |
| a ^= 0x0800; |
| scr_writew(a, q); |
| q++; |
| } |
| } else if (vc->vc_hi_font_mask == 0x100) { |
| while (cnt--) { |
| a = scr_readw(q); |
| a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); |
| scr_writew(a, q); |
| q++; |
| } |
| } else { |
| while (cnt--) { |
| a = scr_readw(q); |
| a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); |
| scr_writew(a, q); |
| q++; |
| } |
| } |
| } |
| #endif |
| if (DO_UPDATE(vc)) |
| do_update_region(vc, (unsigned long) p, count); |
| } |
| |
| /* used by selection: complement pointer position */ |
| void complement_pos(struct vc_data *vc, int offset) |
| { |
| static int old_offset = -1; |
| static unsigned short old; |
| static unsigned short oldx, oldy; |
| |
| WARN_CONSOLE_UNLOCKED(); |
| |
| if (old_offset != -1 && old_offset >= 0 && |
| old_offset < vc->vc_screenbuf_size) { |
| scr_writew(old, screenpos(vc, old_offset, 1)); |
| if (DO_UPDATE(vc)) |
| vc->vc_sw->con_putc(vc, old, oldy, oldx); |
| } |
| |
| old_offset = offset; |
| |
| if (offset != -1 && offset >= 0 && |
| offset < vc->vc_screenbuf_size) { |
| unsigned short new; |
| unsigned short *p; |
| p = screenpos(vc, offset, 1); |
| old = scr_readw(p); |
| new = old ^ vc->vc_complement_mask; |
| scr_writew(new, p); |
| if (DO_UPDATE(vc)) { |
| oldx = (offset >> 1) % vc->vc_cols; |
| oldy = (offset >> 1) / vc->vc_cols; |
| vc->vc_sw->con_putc(vc, new, oldy, oldx); |
| } |
| } |
| |
| } |
| |
| static void insert_char(struct vc_data *vc, unsigned int nr) |
| { |
| unsigned short *p, *q = (unsigned short *)vc->vc_pos; |
| |
| p = q + vc->vc_cols - nr - vc->vc_x; |
| while (--p >= q) |
| scr_writew(scr_readw(p), p + nr); |
| scr_memsetw(q, vc->vc_video_erase_char, nr * 2); |
| vc->vc_need_wrap = 0; |
| if (DO_UPDATE(vc)) { |
| unsigned short oldattr = vc->vc_attr; |
| vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1, |
| vc->vc_cols - vc->vc_x - nr); |
| vc->vc_attr = vc->vc_video_erase_char >> 8; |
| while (nr--) |
| vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr); |
| vc->vc_attr = oldattr; |
| } |
| } |
| |
| static void delete_char(struct vc_data *vc, unsigned int nr) |
| { |
| unsigned int i = vc->vc_x; |
| unsigned short *p = (unsigned short *)vc->vc_pos; |
| |
| while (++i <= vc->vc_cols - nr) { |
| scr_writew(scr_readw(p+nr), p); |
| p++; |
| } |
| scr_memsetw(p, vc->vc_video_erase_char, nr * 2); |
| vc->vc_need_wrap = 0; |
| if (DO_UPDATE(vc)) { |
| unsigned short oldattr = vc->vc_attr; |
| vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1, |
| vc->vc_cols - vc->vc_x - nr); |
| vc->vc_attr = vc->vc_video_erase_char >> 8; |
| while (nr--) |
| vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, |
| vc->vc_cols - 1 - nr); |
| vc->vc_attr = oldattr; |
| } |
| } |
| |
| static int softcursor_original; |
| |
| static void add_softcursor(struct vc_data *vc) |
| { |
| int i = scr_readw((u16 *) vc->vc_pos); |
| u32 type = vc->vc_cursor_type; |
| |
| if (! (type & 0x10)) return; |
| if (softcursor_original != -1) return; |
| softcursor_original = i; |
| i |= ((type >> 8) & 0xff00 ); |
| i ^= ((type) & 0xff00 ); |
| if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; |
| if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; |
| scr_writew(i, (u16 *) vc->vc_pos); |
| if (DO_UPDATE(vc)) |
| vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); |
| } |
| |
| static void hide_softcursor(struct vc_data *vc) |
| { |
| if (softcursor_original != -1) { |
| scr_writew(softcursor_original, (u16 *)vc->vc_pos); |
| if (DO_UPDATE(vc)) |
| vc->vc_sw->con_putc(vc, softcursor_original, |
| vc->vc_y, vc->vc_x); |
| softcursor_original = -1; |
| } |
| } |
| |
| static void hide_cursor(struct vc_data *vc) |
| { |
| if (vc == sel_cons) |
| clear_selection(); |
| vc->vc_sw->con_cursor(vc, CM_ERASE); |
| hide_softcursor(vc); |
| } |
| |
| static void set_cursor(struct vc_data *vc) |
| { |
| if (!IS_FG(vc) || console_blanked || |
| vc->vc_mode == KD_GRAPHICS) |
| return; |
| if (vc->vc_deccm) { |
| if (vc == sel_cons) |
| clear_selection(); |
| add_softcursor(vc); |
| if ((vc->vc_cursor_type & 0x0f) != 1) |
| vc->vc_sw->con_cursor(vc, CM_DRAW); |
| } else |
| hide_cursor(vc); |
| } |
| |
| static void set_origin(struct vc_data *vc) |
| { |
| WARN_CONSOLE_UNLOCKED(); |
| |
| if (!CON_IS_VISIBLE(vc) || |
| !vc->vc_sw->con_set_origin || |
| !vc->vc_sw->con_set_origin(vc)) |
| vc->vc_origin = (unsigned long)vc->vc_screenbuf; |
| vc->vc_visible_origin = vc->vc_origin; |
| vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; |
| vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; |
| } |
| |
| static inline void save_screen(struct vc_data *vc) |
| { |
| WARN_CONSOLE_UNLOCKED(); |
| |
| if (vc->vc_sw->con_save_screen) |
| vc->vc_sw->con_save_screen(vc); |
| } |
| |
| /* |
| * Redrawing of screen |
| */ |
| |
| static void clear_buffer_attributes(struct vc_data *vc) |
| { |
| unsigned short *p = (unsigned short *)vc->vc_origin; |
| int count = vc->vc_screenbuf_size / 2; |
| int mask = vc->vc_hi_font_mask | 0xff; |
| |
| for (; count > 0; count--, p++) { |
| scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); |
| } |
| } |
| |
| void redraw_screen(struct vc_data *vc, int is_switch) |
| { |
| int redraw = 0; |
| |
| WARN_CONSOLE_UNLOCKED(); |
| |
| if (!vc) { |
| /* strange ... */ |
| /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ |
| return; |
| } |
| |
| if (is_switch) { |
| struct vc_data *old_vc = vc_cons[fg_console].d; |
| if (old_vc == vc) |
| return; |
| if (!CON_IS_VISIBLE(vc)) |
| redraw = 1; |
| *vc->vc_display_fg = vc; |
| fg_console = vc->vc_num; |
| hide_cursor(old_vc); |
| if (!CON_IS_VISIBLE(old_vc)) { |
| save_screen(old_vc); |
| set_origin(old_vc); |
| } |
| } else { |
| hide_cursor(vc); |
| redraw = 1; |
| } |
| |
| if (redraw) { |
| int update; |
| int old_was_color = vc->vc_can_do_color; |
| |
| set_origin(vc); |
| update = vc->vc_sw->con_switch(vc); |
| set_palette(vc); |
| /* |
| * If console changed from mono<->color, the best we can do |
| * is to clear the buffer attributes. As it currently stands, |
| * rebuilding new attributes from the old buffer is not doable |
| * without overly complex code. |
| */ |
| if (old_was_color != vc->vc_can_do_color) { |
| update_attr(vc); |
| clear_buffer_attributes(vc); |
| } |
| |
| /* Forcibly update if we're panicing */ |
| if ((update && vc->vc_mode != KD_GRAPHICS) || |
| vt_force_oops_output(vc)) |
| do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); |
| } |
| set_cursor(vc); |
| if (is_switch) { |
| set_leds(); |
| compute_shiftstate(); |
| notify_update(vc); |
| } |
| } |
| |
| /* |
| * Allocation, freeing and resizing of VTs. |
| */ |
| |
| int vc_cons_allocated(unsigned int i) |
| { |
| return (i < MAX_NR_CONSOLES && vc_cons[i].d); |
| } |
| |
| static void visual_init(struct vc_data *vc, int num, int init) |
| { |
| /* ++Geert: vc->vc_sw->con_init determines console size */ |
| if (vc->vc_sw) |
| module_put(vc->vc_sw->owner); |
| vc->vc_sw = conswitchp; |
| #ifndef VT_SINGLE_DRIVER |
| if (con_driver_map[num]) |
| vc->vc_sw = con_driver_map[num]; |
| #endif |
| __module_get(vc->vc_sw->owner); |
| vc->vc_num = num; |
| vc->vc_display_fg = &master_display_fg; |
| vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; |
| vc->vc_uni_pagedir = 0; |
| vc->vc_hi_font_mask = 0; |
| vc->vc_complement_mask = 0; |
| vc->vc_can_do_color = 0; |
| vc->vc_panic_force_write = false; |
| vc->vc_sw->con_init(vc, init); |
| if (!vc->vc_complement_mask) |
| vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; |
| vc->vc_s_complement_mask = vc->vc_complement_mask; |
| vc->vc_size_row = vc->vc_cols << 1; |
| vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; |
| } |
| |
| int vc_allocate(unsigned int currcons) /* return 0 on success */ |
| { |
| WARN_CONSOLE_UNLOCKED(); |
| |
| if (currcons >= MAX_NR_CONSOLES) |
| return -ENXIO; |
| if (!vc_cons[currcons].d) { |
| struct vc_data *vc; |
| struct vt_notifier_param param; |
| |
| /* prevent users from taking too much memory */ |
| if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE)) |
| return -EPERM; |
| |
| /* due to the granularity of kmalloc, we waste some memory here */ |
| /* the alloc is done in two steps, to optimize the common situation |
| of a 25x80 console (structsize=216, screenbuf_size=4000) */ |
| /* although the numbers above are not valid since long ago, the |
| point is still up-to-date and the comment still has its value |
| even if only as a historical artifact. --mj, July 1998 */ |
| param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL); |
| if (!vc) |
| return -ENOMEM; |
| vc_cons[currcons].d = vc; |
| INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); |
| visual_init(vc, currcons, 1); |
| if (!*vc->vc_uni_pagedir_loc) |
| con_set_default_unimap(vc); |
| vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); |
| if (!vc->vc_screenbuf) { |
| kfree(vc); |
| vc_cons[currcons].d = NULL; |
| return -ENOMEM; |
| } |
| |
| /* If no drivers have overridden us and the user didn't pass a |
| boot option, default to displaying the cursor */ |
| if (global_cursor_default == -1) |
| global_cursor_default = 1; |
| |
| vc_init(vc, vc->vc_rows, vc->vc_cols, 1); |
| vcs_make_sysfs(currcons); |
| atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m); |
| } |
| return 0; |
| } |
| |
| static inline int resize_screen(struct vc_data *vc, int width, int height, |
| int user) |
| { |
| /* Resizes the resolution of the display adapater */ |
| int err = 0; |
| |
| if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) |
| err = vc->vc_sw->con_resize(vc, width, height, user); |
| |
| return err; |
| } |
| |
| /* |
| * Change # of rows and columns (0 means unchanged/the size of fg_console) |
| * [this is to be used together with some user program |
| * like resize that changes the hardware videomode] |
| */ |
| #define VC_RESIZE_MAXCOL (32767) |
| #define VC_RESIZE_MAXROW (32767) |
| |
| /** |
| * vc_do_resize - resizing method for the tty |
| * @tty: tty being resized |
| * @real_tty: real tty (different to tty if a pty/tty pair) |
| * @vc: virtual console private data |
| * @cols: columns |
| * @lines: lines |
| * |
| * Resize a virtual console, clipping according to the actual constraints. |
| * If the caller passes a tty structure then update the termios winsize |
| * information and perform any necessary signal handling. |
| * |
| * Caller must hold the console semaphore. Takes the termios mutex and |
| * ctrl_lock of the tty IFF a tty is passed. |
| */ |
| |
| static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, |
| unsigned int cols, unsigned int lines) |
| { |
| unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; |
| unsigned long end; |
| unsigned int old_cols, old_rows, old_row_size, old_screen_size; |
| unsigned int new_cols, new_rows, new_row_size, new_screen_size; |
| unsigned int user; |
| unsigned short *newscreen; |
| |
| WARN_CONSOLE_UNLOCKED(); |
| |
| if (!vc) |
| return -ENXIO; |
| |
| user = vc->vc_resize_user; |
| vc->vc_resize_user = 0; |
| |
| if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) |
| return -EINVAL; |
| |
| new_cols = (cols ? cols : vc->vc_cols); |
| new_rows = (lines ? lines : vc->vc_rows); |
| new_row_size = new_cols << 1; |
| new_screen_size = new_row_size * new_rows; |
| |
| if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) |
| return 0; |
| |
| newscreen = kmalloc(new_screen_size, GFP_USER); |
| if (!newscreen) |
| return -ENOMEM; |
| |
| old_rows = vc->vc_rows; |
| old_cols = vc->vc_cols; |
| old_row_size = vc->vc_size_row; |
| old_screen_size = vc->vc_screenbuf_size; |
| |
| err = resize_screen(vc, new_cols, new_rows, user); |
| if (err) { |
| kfree(newscreen); |
| return err; |
| } |
| |
| vc->vc_rows = new_rows; |
| vc->vc_cols = new_cols; |
| vc->vc_size_row = new_row_size; |
| vc->vc_screenbuf_size = new_screen_size; |
| |
| rlth = min(old_row_size, new_row_size); |
| rrem = new_row_size - rlth; |
| old_origin = vc->vc_origin; |
| new_origin = (long) newscreen; |
| new_scr_end = new_origin + new_screen_size; |
| |
| if (vc->vc_y > new_rows) { |
| if (old_rows - vc->vc_y < new_rows) { |
| /* |
| * Cursor near the bottom, copy contents from the |
| * bottom of buffer |
| */ |
| old_origin += (old_rows - new_rows) * old_row_size; |
| end = vc->vc_scr_end; |
| } else { |
| /* |
| * Cursor is in no man's land, copy 1/2 screenful |
| * from the top and bottom of cursor position |
| */ |
| old_origin += (vc->vc_y - new_rows/2) * old_row_size; |
| end = old_origin + (old_row_size * new_rows); |
| } |
| } else |
| /* |
| * Cursor near the top, copy contents from the top of buffer |
| */ |
| end = (old_rows > new_rows) ? old_origin + |
| (old_row_size * new_rows) : |
| vc->vc_scr_end; |
| |
| update_attr(vc); |
| |
| while (old_origin < end) { |
| scr_memcpyw((unsigned short *) new_origin, |
| (unsigned short *) old_origin, rlth); |
| if (rrem) |
| scr_memsetw((void *)(new_origin + rlth), |
| vc->vc_video_erase_char, rrem); |
| old_origin += old_row_size; |
| new_origin += new_row_size; |
| } |
| if (new_scr_end > new_origin) |
| scr_memsetw((void *)new_origin, vc->vc_video_erase_char, |
| new_scr_end - new_origin); |
| kfree(vc->vc_screenbuf); |
| vc->vc_screenbuf = newscreen; |
| vc->vc_screenbuf_size = new_screen_size; |
| set_origin(vc); |
| |
| /* do part of a reset_terminal() */ |
| vc->vc_top = 0; |
| vc->vc_bottom = vc->vc_rows; |
| gotoxy(vc, vc->vc_x, vc->vc_y); |
| save_cur(vc); |
| |
| if (tty) { |
| /* Rewrite the requested winsize data with the actual |
| resulting sizes */ |
| struct winsize ws; |
| memset(&ws, 0, sizeof(ws)); |
| ws.ws_row = vc->vc_rows; |
| ws.ws_col = vc->vc_cols; |
| ws.ws_ypixel = vc->vc_scan_lines; |
| tty_do_resize(tty, &ws); |
| } |
| |
| if (CON_IS_VISIBLE(vc)) |
| update_screen(vc); |
| vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num); |
| return err; |
| } |
| |
| /** |
| * vc_resize - resize a VT |
| * @vc: virtual console |
| * @cols: columns |
| * @rows: rows |
| * |
| * Resize a virtual console as seen from the console end of things. We |
| * use the common vc_do_resize methods to update the structures. The |
| * caller must hold the console sem to protect console internals and |
| * vc->vc_tty |
| */ |
| |
| int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows) |
| { |
| return vc_do_resize(vc->vc_tty, vc, cols, rows); |
| } |
| |
| /** |
| * vt_resize - resize a VT |
| * @tty: tty to resize |
| * @ws: winsize attributes |
| * |
| * Resize a virtual terminal. This is called by the tty layer as we |
| * register our own handler for resizing. The mutual helper does all |
| * the actual work. |
| * |
| * Takes the console sem and the called methods then take the tty |
| * termios_mutex and the tty ctrl_lock in that order. |
| */ |
| static int vt_resize(struct tty_struct *tty, struct winsize *ws) |
| { |
| struct vc_data *vc = tty->driver_data; |
| int ret; |
| |
| acquire_console_sem(); |
| ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row); |
| release_console_sem(); |
| return ret; |
| } |
| |
| void vc_deallocate(unsigned int currcons) |
| { |
| WARN_CONSOLE_UNLOCKED(); |
| |
| if (vc_cons_allocated(currcons)) { |
| struct vc_data *vc = vc_cons[currcons].d; |
| struct vt_notifier_param param = { .vc = vc }; |
| |
| atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); |
| vcs_remove_sysfs(currcons); |
| vc->vc_sw->con_deinit(vc); |
| put_pid(vc->vt_pid); |
| module_put(vc->vc_sw->owner); |
| kfree(vc->vc_screenbuf); |
| if (currcons >= MIN_NR_CONSOLES) |
| kfree(vc); |
| vc_cons[currcons].d = NULL; |
| } |
| } |
| |
| /* |
| * VT102 emulator |
| */ |
| |
| #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) |
| #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) |
| #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) |
| |
| #define decarm VC_REPEAT |
| #define decckm VC_CKMODE |
| #define kbdapplic VC_APPLIC |
| #define lnm VC_CRLF |
| |
| /* |
| * this is what the terminal answers to a ESC-Z or csi0c query. |
| */ |
| #define VT100ID "\033[?1;2c" |
| #define VT102ID "\033[?6c" |
| |
| unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, |
| 8,12,10,14, 9,13,11,15 }; |
| |
| /* the default colour table, for VGA+ colour systems */ |
| int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa, |
| 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff}; |
| int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa, |
| 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff}; |
| int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa, |
| 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff}; |
| |
| module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR); |
| module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR); |
| module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR); |
| |
| /* |
| * gotoxy() must verify all boundaries, because the arguments |
| * might also be negative. If the given position is out of |
| * bounds, the cursor is placed at the nearest margin. |
| */ |
| static void gotoxy(struct vc_data *vc, int new_x, int new_y) |
| { |
| int min_y, max_y; |
| |
| if (new_x < 0) |
| vc->vc_x = 0; |
| else { |
| if (new_x >= vc->vc_cols) |
| vc->vc_x = vc->vc_cols - 1; |
| else |
| vc->vc_x = new_x; |
| } |
| |
| if (vc->vc_decom) { |
| min_y = vc->vc_top; |
| max_y = vc->vc_bottom; |
| } else { |
| min_y = 0; |
| max_y = vc->vc_rows; |
| } |
| if (new_y < min_y) |
| vc->vc_y = min_y; |
| else if (new_y >= max_y) |
| vc->vc_y = max_y - 1; |
| else |
| vc->vc_y = new_y; |
| vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1); |
| vc->vc_need_wrap = 0; |
| } |
| |
| /* for absolute user moves, when decom is set */ |
| static void gotoxay(struct vc_data *vc, int new_x, int new_y) |
| { |
| gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y); |
| } |
| |
| void scrollback(struct vc_data *vc, int lines) |
| { |
| if (!lines) |
| lines = vc->vc_rows / 2; |
| scrolldelta(-lines); |
| } |
| |
| void scrollfront(struct vc_data *vc, int lines) |
| { |
| if (!lines) |
| lines = vc->vc_rows / 2; |
| scrolldelta(lines); |
| } |
| |
| static void lf(struct vc_data *vc) |
| { |
| /* don't scroll if above bottom of scrolling region, or |
| * if below scrolling region |
| */ |
| if (vc->vc_y + 1 == vc->vc_bottom) |
| scrup(vc, vc->vc_top, vc->vc_bottom, 1); |
| else if (vc->vc_y < vc->vc_rows - 1) { |
| vc->vc_y++; |
| vc->vc_pos += vc->vc_size_row; |
| } |
| vc->vc_need_wrap = 0; |
| notify_write(vc, '\n'); |
| } |
| |
| static void ri(struct vc_data *vc) |
| { |
| /* don't scroll if below top of scrolling region, or |
| * if above scrolling region |
| */ |
| if (vc->vc_y == vc->vc_top) |
| scrdown(vc, vc->vc_top, vc->vc_bottom, 1); |
| else if (vc->vc_y > 0) { |
| vc->vc_y--; |
| vc->vc_pos -= vc->vc_size_row; |
| } |
| vc->vc_need_wrap = 0; |
| } |
| |
| static inline void cr(struct vc_data *vc) |
| { |
| vc->vc_pos -= vc->vc_x << 1; |
| vc->vc_need_wrap = vc->vc_x = 0; |
| notify_write(vc, '\r'); |
| } |
| |
| static inline void bs(struct vc_data *vc) |
| { |
| if (vc->vc_x) { |
| vc->vc_pos -= 2; |
| vc->vc_x--; |
| vc->vc_need_wrap = 0; |
| notify_write(vc, '\b'); |
| } |
| } |
| |
| static inline void del(struct vc_data *vc) |
| { |
| /* ignored */ |
| } |
| |
| static void csi_J(struct vc_data *vc, int vpar) |
| { |
| unsigned int count; |
| unsigned short * start; |
| |
| switch (vpar) { |
| case 0: /* erase from cursor to end of display */ |
| count = (vc->vc_scr_end - vc->vc_pos) >> 1; |
| start = (unsigned short *)vc->vc_pos; |
| if (DO_UPDATE(vc)) { |
| /* do in two stages */ |
| vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, |
| vc->vc_cols - vc->vc_x); |
| vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0, |
| vc->vc_rows - vc->vc_y - 1, |
| vc->vc_cols); |
| } |
| break; |
| case 1: /* erase from start to cursor */ |
| count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; |
| start = (unsigned short *)vc->vc_origin; |
| if (DO_UPDATE(vc)) { |
| /* do in two stages */ |
| vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y, |
| vc->vc_cols); |
| vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, |
| vc->vc_x + 1); |
| } |
| break; |
| case 2: /* erase whole display */ |
| count = vc->vc_cols * vc->vc_rows; |
| start = (unsigned short *)vc->vc_origin; |
| if (DO_UPDATE(vc)) |
| vc->vc_sw->con_clear(vc, 0, 0, |
| vc->vc_rows, |
| vc->vc_cols); |
| break; |
| default: |
| return; |
| } |
| scr_memsetw(start, vc->vc_video_erase_char, 2 * count); |
| vc->vc_need_wrap = 0; |
| } |
| |
| static void csi_K(struct vc_data *vc, int vpar) |
| { |
| unsigned int count; |
| unsigned short * start; |
| |
| switch (vpar) { |
| case 0: /* erase from cursor to end of line */ |
| count = vc->vc_cols - vc->vc_x; |
| start = (unsigned short *)vc->vc_pos; |
| if (DO_UPDATE(vc)) |
| vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, |
| vc->vc_cols - vc->vc_x); |
| break; |
| case 1: /* erase from start of line to cursor */ |
| start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); |
| count = vc->vc_x + 1; |
| if (DO_UPDATE(vc)) |
| vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, |
| vc->vc_x + 1); |
| break; |
| case 2: /* erase whole line */ |
| start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); |
| count = vc->vc_cols; |
| if (DO_UPDATE(vc)) |
| vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, |
| vc->vc_cols); |
| break; |
| default: |
| return; |
| } |
| scr_memsetw(start, vc->vc_video_erase_char, 2 * count); |
| vc->vc_need_wrap = 0; |
| } |
| |
| static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ |
| { /* not vt100? */ |
| int count; |
| |
| if (!vpar) |
| vpar++; |
| count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; |
| |
| scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); |
| if (DO_UPDATE(vc)) |
| vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); |
| vc->vc_need_wrap = 0; |
| } |
| |
| static void default_attr(struct vc_data *vc) |
| { |
| vc->vc_intensity = 1; |
| vc->vc_italic = 0; |
| vc->vc_underline = 0; |
| vc->vc_reverse = 0; |
| vc->vc_blink = 0; |
| vc->vc_color = vc->vc_def_color; |
| } |
| |
| /* console_sem is held */ |
| static void csi_m(struct vc_data *vc) |
| { |
| int i; |
| |
| for (i = 0; i <= vc->vc_npar; i++) |
| switch (vc->vc_par[i]) { |
| case 0: /* all attributes off */ |
| default_attr(vc); |
| break; |
| case 1: |
| vc->vc_intensity = 2; |
| break; |
| case 2: |
| vc->vc_intensity = 0; |
| break; |
| case 3: |
| vc->vc_italic = 1; |
| break; |
| case 4: |
| vc->vc_underline = 1; |
| break; |
| case 5: |
| vc->vc_blink = 1; |
| break; |
| case 7: |
| vc->vc_reverse = 1; |
| break; |
| case 10: /* ANSI X3.64-1979 (SCO-ish?) |
| * Select primary font, don't display |
| * control chars if defined, don't set |
| * bit 8 on output. |
| */ |
| vc->vc_translate = set_translate(vc->vc_charset == 0 |
| ? vc->vc_G0_charset |
| : vc->vc_G1_charset, vc); |
| vc->vc_disp_ctrl = 0; |
| vc->vc_toggle_meta = 0; |
| break; |
| case 11: /* ANSI X3.64-1979 (SCO-ish?) |
| * Select first alternate font, lets |
| * chars < 32 be displayed as ROM chars. |
| */ |
| vc->vc_translate = set_translate(IBMPC_MAP, vc); |
| vc->vc_disp_ctrl = 1; |
| vc->vc_toggle_meta = 0; |
| break; |
| case 12: /* ANSI X3.64-1979 (SCO-ish?) |
| * Select second alternate font, toggle |
| * high bit before displaying as ROM char. |
| */ |
| vc->vc_translate = set_translate(IBMPC_MAP, vc); |
| vc->vc_disp_ctrl = 1; |
| vc->vc_toggle_meta = 1; |
| break; |
| case 21: |
| case 22: |
| vc->vc_intensity = 1; |
| break; |
| case 23: |
| vc->vc_italic = 0; |
| break; |
| case 24: |
| vc->vc_underline = 0; |
| break; |
| case 25: |
| vc->vc_blink = 0; |
| break; |
| case 27: |
| vc->vc_reverse = 0; |
| break; |
| case 38: /* ANSI X3.64-1979 (SCO-ish?) |
| * Enables underscore, white foreground |
| * with white underscore (Linux - use |
| * default foreground). |
| */ |
| vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); |
| vc->vc_underline = 1; |
| break; |
| case 39: /* ANSI X3.64-1979 (SCO-ish?) |
| * Disable underline option. |
| * Reset colour to default? It did this |
| * before... |
| */ |
| vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); |
| vc->vc_underline = 0; |
| break; |
| case 49: |
| vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f); |
| break; |
| default: |
| if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) |
| vc->vc_color = color_table[vc->vc_par[i] - 30] |
| | (vc->vc_color & 0xf0); |
| else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) |
| vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) |
| | (vc->vc_color & 0x0f); |
| break; |
| } |
| update_attr(vc); |
| } |
| |
| static void respond_string(const char *p, struct tty_struct *tty) |
| { |
| while (*p) { |
| tty_insert_flip_char(tty, *p, 0); |
| p++; |
| } |
| con_schedule_flip(tty); |
| } |
| |
| static void cursor_report(struct vc_data *vc, struct tty_struct *tty) |
| { |
| char buf[40]; |
| |
| sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); |
| respond_string(buf, tty); |
| } |
| |
| static inline void status_report(struct tty_struct *tty) |
| { |
| respond_string("\033[0n", tty); /* Terminal ok */ |
| } |
| |
| static inline void respond_ID(struct tty_struct * tty) |
| { |
| respond_string(VT102ID, tty); |
| } |
| |
| void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) |
| { |
| char buf[8]; |
| |
| sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), |
| (char)('!' + mry)); |
| respond_string(buf, tty); |
| } |
| |
| /* invoked via ioctl(TIOCLINUX) and through set_selection */ |
| int mouse_reporting(void) |
| { |
| return vc_cons[fg_console].d->vc_report_mouse; |
| } |
| |
| /* console_sem is held */ |
| static void set_mode(struct vc_data *vc, int on_off) |
| { |
| int i; |
| |
| for (i = 0; i <= vc->vc_npar; i++) |
| if (vc->vc_ques) { |
| switch(vc->vc_par[i]) { /* DEC private modes set/reset */ |
| case 1: /* Cursor keys send ^[Ox/^[[x */ |
| if (on_off) |
| set_kbd(vc, decckm); |
| else |
| clr_kbd(vc, decckm); |
| break; |
| case 3: /* 80/132 mode switch unimplemented */ |
| vc->vc_deccolm = on_off; |
| #if 0 |
| vc_resize(deccolm ? 132 : 80, vc->vc_rows); |
| /* this alone does not suffice; some user mode |
| utility has to change the hardware regs */ |
| #endif |
| break; |
| case 5: /* Inverted screen on/off */ |
| if (vc->vc_decscnm != on_off) { |
| vc->vc_decscnm = on_off; |
| invert_screen(vc, 0, vc->vc_screenbuf_size, 0); |
| update_attr(vc); |
| } |
| break; |
| case 6: /* Origin relative/absolute */ |
| vc->vc_decom = on_off; |
| gotoxay(vc, 0, 0); |
| break; |
| case 7: /* Autowrap on/off */ |
| vc->vc_decawm = on_off; |
| break; |
| case 8: /* Autorepeat on/off */ |
| if (on_off) |
| set_kbd(vc, decarm); |
| else |
| clr_kbd(vc, decarm); |
| break; |
| case 9: |
| vc->vc_report_mouse = on_off ? 1 : 0; |
| break; |
| case 25: /* Cursor on/off */ |
| vc->vc_deccm = on_off; |
| break; |
| case 1000: |
| vc->vc_report_mouse = on_off ? 2 : 0; |
| break; |
| } |
| } else { |
| switch(vc->vc_par[i]) { /* ANSI modes set/reset */ |
| case 3: /* Monitor (display ctrls) */ |
| vc->vc_disp_ctrl = on_off; |
| break; |
| case 4: /* Insert Mode on/off */ |
| vc->vc_decim = on_off; |
| break; |
| case 20: /* Lf, Enter == CrLf/Lf */ |
| if (on_off) |
| set_kbd(vc, lnm); |
| else |
| clr_kbd(vc, lnm); |
| break; |
| } |
| } |
| } |
| |
| /* console_sem is held */ |
| static void setterm_command(struct vc_data *vc) |
| { |
| switch(vc->vc_par[0]) { |
| case 1: /* set color for underline mode */ |
| if (vc->vc_can_do_color && |
| vc->vc_par[1] < 16) { |
| vc->vc_ulcolor = color_table[vc->vc_par[1]]; |
| if (vc->vc_underline) |
| update_attr(vc); |
| } |
| break; |
| case 2: /* set color for half intensity mode */ |
| if (vc->vc_can_do_color && |
| vc->vc_par[1] < 16) { |
| vc->vc_halfcolor = color_table[vc->vc_par[1]]; |
| if (vc->vc_intensity == 0) |
| update_attr(vc); |
| } |
| break; |
| case 8: /* store colors as defaults */ |
| vc->vc_def_color = vc->vc_attr; |
| if (vc->vc_hi_font_mask == 0x100) |
| vc->vc_def_color >>= 1; |
| default_attr(vc); |
| update_attr(vc); |
| break; |
| case 9: /* set blanking interval */ |
| blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60; |
| poke_blanked_console(); |
| break; |
| case 10: /* set bell frequency in Hz */ |
| if (vc->vc_npar >= 1) |
| vc->vc_bell_pitch = vc->vc_par[1]; |
| else |
| vc->vc_bell_pitch = DEFAULT_BELL_PITCH; |
| break; |
| case 11: /* set bell duration in msec */ |
| if (vc->vc_npar >= 1) |
| vc->vc_bell_duration = (vc->vc_par[1] < 2000) ? |
| vc->vc_par[1] * HZ / 1000 : 0; |
| else |
| vc->vc_bell_duration = DEFAULT_BELL_DURATION; |
| break; |
| case 12: /* bring specified console to the front */ |
| if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1)) |
| set_console(vc->vc_par[1] - 1); |
| break; |
| case 13: /* unblank the screen */ |
| poke_blanked_console(); |
| break; |
| case 14: /* set vesa powerdown interval */ |
| vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; |
| break; |
| case 15: /* activate the previous console */ |
| set_console(last_console); |
| break; |
| } |
| } |
| |
| /* console_sem is held */ |
| static void csi_at(struct vc_data *vc, unsigned int nr) |
| { |
| if (nr > vc->vc_cols - vc->vc_x) |
| nr = vc->vc_cols - vc->vc_x; |
| else if (!nr) |
| nr = 1; |
| insert_char(vc, nr); |
| } |
| |
| /* console_sem is held */ |
| static void csi_L(struct vc_data *vc, unsigned int nr) |
| { |
| if (nr > vc->vc_rows - vc->vc_y) |
| nr = vc->vc_rows - vc->vc_y; |
| else if (!nr) |
| nr = 1; |
| scrdown(vc, vc->vc_y, vc->vc_bottom, nr); |
| vc->vc_need_wrap = 0; |
| } |
| |
| /* console_sem is held */ |
| static void csi_P(struct vc_data *vc, unsigned int nr) |
| { |
| if (nr > vc->vc_cols - vc->vc_x) |
| nr = vc->vc_cols - vc->vc_x; |
| else if (!nr) |
| nr = 1; |
| delete_char(vc, nr); |
| } |
| |
| /* console_sem is held */ |
| static void csi_M(struct vc_data *vc, unsigned int nr) |
| { |
| if (nr > vc->vc_rows - vc->vc_y) |
| nr = vc->vc_rows - vc->vc_y; |
| else if (!nr) |
| nr=1; |
| scrup(vc, vc->vc_y, vc->vc_bottom, nr); |
| vc->vc_need_wrap = 0; |
| } |
| |
| /* console_sem is held (except via vc_init->reset_terminal */ |
| static void save_cur(struct vc_data *vc) |
| { |
| vc->vc_saved_x = vc->vc_x; |
| vc->vc_saved_y = vc->vc_y; |
| vc->vc_s_intensity = vc->vc_intensity; |
| vc->vc_s_italic = vc->vc_italic; |
| vc->vc_s_underline = vc->vc_underline; |
| vc->vc_s_blink = vc->vc_blink; |
| vc->vc_s_reverse = vc->vc_reverse; |
| vc->vc_s_charset = vc->vc_charset; |
| vc->vc_s_color = vc->vc_color; |
| vc->vc_saved_G0 = vc->vc_G0_charset; |
| vc->vc_saved_G1 = vc->vc_G1_charset; |
| } |
| |
| /* console_sem is held */ |
| static void restore_cur(struct vc_data *vc) |
| { |
| gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y); |
| vc->vc_intensity = vc->vc_s_intensity; |
| vc->vc_italic = vc->vc_s_italic; |
| vc->vc_underline = vc->vc_s_underline; |
| vc->vc_blink = vc->vc_s_blink; |
| vc->vc_reverse = vc->vc_s_reverse; |
| vc->vc_charset = vc->vc_s_charset; |
| vc->vc_color = vc->vc_s_color; |
| vc->vc_G0_charset = vc->vc_saved_G0; |
| vc->vc_G1_charset = vc->vc_saved_G1; |
| vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc); |
| update_attr(vc); |
| vc->vc_need_wrap = 0; |
| } |
| |
| enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey, |
| EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd, |
| ESpalette }; |
| |
| /* console_sem is held (except via vc_init()) */ |
| static void reset_terminal(struct vc_data *vc, int do_clear) |
| { |
| vc->vc_top = 0; |
| vc->vc_bottom = vc->vc_rows; |
| vc->vc_state = ESnormal; |
| vc->vc_ques = 0; |
| vc->vc_translate = set_translate(LAT1_MAP, vc); |
| vc->vc_G0_charset = LAT1_MAP; |
| vc->vc_G1_charset = GRAF_MAP; |
| vc->vc_charset = 0; |
| vc->vc_need_wrap = 0; |
| vc->vc_report_mouse = 0; |
| vc->vc_utf = default_utf8; |
| vc->vc_utf_count = 0; |
| |
| vc->vc_disp_ctrl = 0; |
| vc->vc_toggle_meta = 0; |
| |
| vc->vc_decscnm = 0; |
| vc->vc_decom = 0; |
| vc->vc_decawm = 1; |
| vc->vc_deccm = global_cursor_default; |
| vc->vc_decim = 0; |
| |
| set_kbd(vc, decarm); |
| clr_kbd(vc, decckm); |
| clr_kbd(vc, kbdapplic); |
| clr_kbd(vc, lnm); |
| kbd_table[vc->vc_num].lockstate = 0; |
| kbd_table[vc->vc_num].slockstate = 0; |
| kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS; |
| kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate; |
| /* do not do set_leds here because this causes an endless tasklet loop |
| when the keyboard hasn't been initialized yet */ |
| |
| vc->vc_cursor_type = cur_default; |
| vc->vc_complement_mask = vc->vc_s_complement_mask; |
| |
| default_attr(vc); |
| update_attr(vc); |
| |
| vc->vc_tab_stop[0] = 0x01010100; |
| vc->vc_tab_stop[1] = |
| vc->vc_tab_stop[2] = |
| vc->vc_tab_stop[3] = |
| vc->vc_tab_stop[4] = |
| vc->vc_tab_stop[5] = |
| vc->vc_tab_stop[6] = |
| vc->vc_tab_stop[7] = 0x01010101; |
| |
| vc->vc_bell_pitch = DEFAULT_BELL_PITCH; |
| vc->vc_bell_duration = DEFAULT_BELL_DURATION; |
| |
| gotoxy(vc, 0, 0); |
| save_cur(vc); |
| if (do_clear) |
| csi_J(vc, 2); |
| } |
| |
| /* console_sem is held */ |
| static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) |
| { |
| /* |
| * Control characters can be used in the _middle_ |
| * of an escape sequence. |
| */ |
| switch (c) { |
| case 0: |
| return; |
| case 7: |
| if (vc->vc_bell_duration) |
| kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); |
| return; |
| case 8: |
| bs(vc); |
| return; |
| case 9: |
| vc->vc_pos -= (vc->vc_x << 1); |
| while (vc->vc_x < vc->vc_cols - 1) { |
| vc->vc_x++; |
| if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31))) |
| break; |
| } |
| vc->vc_pos += (vc->vc_x << 1); |
| notify_write(vc, '\t'); |
| return; |
| case 10: case 11: case 12: |
| lf(vc); |
| if (!is_kbd(vc, lnm)) |
| return; |
| case 13: |
| cr(vc); |
| return; |
| case 14: |
| vc->vc_charset = 1; |
| vc->vc_translate = set_translate(vc->vc_G1_charset, vc); |
| vc->vc_disp_ctrl = 1; |
| return; |
| case 15: |
| vc->vc_charset = 0; |
| vc->vc_translate = set_translate(vc->vc_G0_charset, vc); |
| vc->vc_disp_ctrl = 0; |
| return; |
| case 24: case 26: |
| vc->vc_state = ESnormal; |
| return; |
| case 27: |
| vc->vc_state = ESesc; |
| return; |
| case 127: |
| del(vc); |
| return; |
| case 128+27: |
| vc->vc_state = ESsquare; |
| return; |
| } |
| switch(vc->vc_state) { |
| case ESesc: |
| vc->vc_state = ESnormal; |
| switch (c) { |
| case '[': |
| vc->vc_state = ESsquare; |
| return; |
| case ']': |
| vc->vc_state = ESnonstd; |
| return; |
| case '%': |
| vc->vc_state = ESpercent; |
| return; |
| case 'E': |
| cr(vc); |
| lf(vc); |
| return; |
| case 'M': |
| ri(vc); |
| return; |
| case 'D': |
| lf(vc); |
| return; |
| case 'H': |
| vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31)); |
| return; |
| case 'Z': |
| respond_ID(tty); |
| return; |
| case '7': |
| save_cur(vc); |
| return; |
| case '8': |
| restore_cur(vc); |
| return; |
| case '(': |
| vc->vc_state = ESsetG0; |
| return; |
| case ')': |
| vc->vc_state = ESsetG1; |
| return; |
| case '#': |
| vc->vc_state = EShash; |
| return; |
| case 'c': |
| reset_terminal(vc, 1); |
| return; |
| case '>': /* Numeric keypad */ |
| clr_kbd(vc, kbdapplic); |
| return; |
| case '=': /* Appl. keypad */ |
| set_kbd(vc, kbdapplic); |
| return; |
| } |
| return; |
| case ESnonstd: |
| if (c=='P') { /* palette escape sequence */ |
| for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) |
| vc->vc_par[vc->vc_npar] = 0; |
| vc->vc_npar = 0; |
| vc->vc_state = ESpalette; |
| return; |
| } else if (c=='R') { /* reset palette */ |
| reset_palette(vc); |
| vc->vc_state = ESnormal; |
| } else |
| vc->vc_state = ESnormal; |
| return; |
| case ESpalette: |
| if (isxdigit(c)) { |
| vc->vc_par[vc->vc_npar++] = hex_to_bin(c); |
| if (vc->vc_npar == 7) { |
| int i = vc->vc_par[0] * 3, j = 1; |
| vc->vc_palette[i] = 16 * vc->vc_par[j++]; |
| vc->vc_palette[i++] += vc->vc_par[j++]; |
| vc->vc_palette[i] = 16 * vc->vc_par[j++]; |
| vc->vc_palette[i++] += vc->vc_par[j++]; |
| vc->vc_palette[i] = 16 * vc->vc_par[j++]; |
| vc->vc_palette[i] += vc->vc_par[j]; |
| set_palette(vc); |
| vc->vc_state = ESnormal; |
| } |
| } else |
| vc->vc_state = ESnormal; |
| return; |
| case ESsquare: |
| for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) |
| vc->vc_par[vc->vc_npar] = 0; |
| vc->vc_npar = 0; |
| vc->vc_state = ESgetpars; |
| if (c == '[') { /* Function key */ |
| vc->vc_state=ESfunckey; |
| return; |
| } |
| vc->vc_ques = (c == '?'); |
| if (vc->vc_ques) |
| return; |
| case ESgetpars: |
| if (c == ';' && vc->vc_npar < NPAR - 1) { |
| vc->vc_npar++; |
| return; |
| } else if (c>='0' && c<='9') { |
| vc->vc_par[vc->vc_npar] *= 10; |
| vc->vc_par[vc->vc_npar] += c - '0'; |
| return; |
| } else |
| vc->vc_state = ESgotpars; |
| case ESgotpars: |
| vc->vc_state = ESnormal; |
| switch(c) { |
| case 'h': |
| set_mode(vc, 1); |
| return; |
| case 'l': |
| set_mode(vc, 0); |
| return; |
| case 'c': |
| if (vc->vc_ques) { |
| if (vc->vc_par[0]) |
| vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16); |
| else |
| vc->vc_cursor_type = cur_default; |
| return; |
| } |
| break; |
| case 'm': |
| if (vc->vc_ques) { |
| clear_selection(); |
| if (vc->vc_par[0]) |
| vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1]; |
| else |
| vc->vc_complement_mask = vc->vc_s_complement_mask; |
| return; |
| } |
| break; |
| case 'n': |
| if (!vc->vc_ques) { |
| if (vc->vc_par[0] == 5) |
| status_report(tty); |
| else if (vc->vc_par[0] == 6) |
| cursor_report(vc, tty); |
| } |
| return; |
| } |
| if (vc->vc_ques) { |
| vc->vc_ques = 0; |
| return; |
| } |
| switch(c) { |
| case 'G': case '`': |
| if (vc->vc_par[0]) |
| vc->vc_par[0]--; |
| gotoxy(vc, vc->vc_par[0], vc->vc_y); |
| return; |
| case 'A': |
| if (!vc->vc_par[0]) |
| vc->vc_par[0]++; |
| gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]); |
| return; |
| case 'B': case 'e': |
| if (!vc->vc_par[0]) |
| vc->vc_par[0]++; |
| gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]); |
| return; |
| case 'C': case 'a': |
| if (!vc->vc_par[0]) |
| vc->vc_par[0]++; |
| gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y); |
| return; |
| case 'D': |
| if (!vc->vc_par[0]) |
| vc->vc_par[0]++; |
| gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y); |
| return; |
| case 'E': |
| if (!vc->vc_par[0]) |
| vc->vc_par[0]++; |
| gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]); |
| return; |
| case 'F': |
| if (!vc->vc_par[0]) |
| vc->vc_par[0]++; |
| gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]); |
| return; |
| case 'd': |
| if (vc->vc_par[0]) |
| vc->vc_par[0]--; |
| gotoxay(vc, vc->vc_x ,vc->vc_par[0]); |
| return; |
| case 'H': case 'f': |
| if (vc->vc_par[0]) |
| vc->vc_par[0]--; |
| if (vc->vc_par[1]) |
| vc->vc_par[1]--; |
| gotoxay(vc, vc->vc_par[1], vc->vc_par[0]); |
| return; |
| case 'J': |
| csi_J(vc, vc->vc_par[0]); |
| return; |
| case 'K': |
| csi_K(vc, vc->vc_par[0]); |
| return; |
| case 'L': |
| csi_L(vc, vc->vc_par[0]); |
| return; |
| case 'M': |
| csi_M(vc, vc->vc_par[0]); |
| return; |
| case 'P': |
| csi_P(vc, vc->vc_par[0]); |
| return; |
| case 'c': |
| if (!vc->vc_par[0]) |
| respond_ID(tty); |
| return; |
| case 'g': |
| if (!vc->vc_par[0]) |
| vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31)); |
| else if (vc->vc_par[0] == 3) { |
| vc->vc_tab_stop[0] = |
| vc->vc_tab_stop[1] = |
| vc->vc_tab_stop[2] = |
| vc->vc_tab_stop[3] = |
| vc->vc_tab_stop[4] = |
| vc->vc_tab_stop[5] = |
| vc->vc_tab_stop[6] = |
| vc->vc_tab_stop[7] = 0; |
| } |
| return; |
| case 'm': |
| csi_m(vc); |
| return; |
| case 'q': /* DECLL - but only 3 leds */ |
| /* map 0,1,2,3 to 0,1,2,4 */ |
| if (vc->vc_par[0] < 4) |
| setledstate(kbd_table + vc->vc_num, |
| (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4); |
| return; |
| case 'r': |
| if (!vc->vc_par[0]) |
| vc->vc_par[0]++; |
| if (!vc->vc_par[1]) |
| vc->vc_par[1] = vc->vc_rows; |
| /* Minimum allowed region is 2 lines */ |
| if (vc->vc_par[0] < vc->vc_par[1] && |
| vc->vc_par[1] <= vc->vc_rows) { |
| vc->vc_top = vc->vc_par[0] - 1; |
| vc->vc_bottom = vc->vc_par[1]; |
| gotoxay(vc, 0, 0); |
| } |
| return; |
| case 's': |
| save_cur(vc); |
| return; |
| case 'u': |
| restore_cur(vc); |
| return; |
| case 'X': |
| csi_X(vc, vc->vc_par[0]); |
| return; |
| case '@': |
| csi_at(vc, vc->vc_par[0]); |
| return; |
| case ']': /* setterm functions */ |
| setterm_command(vc); |
| return; |
| } |
| return; |
| case ESpercent: |
| vc->vc_state = ESnormal; |
| switch (c) { |
| case '@': /* defined in ISO 2022 */ |
| vc->vc_utf = 0; |
| return; |
| case 'G': /* prelim official escape code */ |
| case '8': /* retained for compatibility */ |
| vc->vc_utf = 1; |
| return; |
| } |
| return; |
| case ESfunckey: |
| vc->vc_state = ESnormal; |
| return; |
| case EShash: |
| vc->vc_state = ESnormal; |
| if (c == '8') { |
| /* DEC screen alignment test. kludge :-) */ |
| vc->vc_video_erase_char = |
| (vc->vc_video_erase_char & 0xff00) | 'E'; |
| csi_J(vc, 2); |
| vc->vc_video_erase_char = |
| (vc->vc_video_erase_char & 0xff00) | ' '; |
| do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); |
| } |
| return; |
| case ESsetG0: |
| if (c == '0') |
| vc->vc_G0_charset = GRAF_MAP; |
| else if (c == 'B') |
| vc->vc_G0_charset = LAT1_MAP; |
| else if (c == 'U') |
| vc->vc_G0_charset = IBMPC_MAP; |
| else if (c == 'K') |
| vc->vc_G0_charset = USER_MAP; |
| if (vc->vc_charset == 0) |
| vc->vc_translate = set_translate(vc->vc_G0_charset, vc); |
| vc->vc_state = ESnormal; |
| return; |
| case ESsetG1: |
| if (c == '0') |
| vc->vc_G1_charset = GRAF_MAP; |
| else if (c == 'B') |
| vc->vc_G1_charset = LAT1_MAP; |
| else if (c == 'U') |
| vc->vc_G1_charset = IBMPC_MAP; |
| else if (c == 'K') |
| vc->vc_G1_charset = USER_MAP; |
| if (vc->vc_charset == 1) |
| vc->vc_translate = set_translate(vc->vc_G1_charset, vc); |
| vc->vc_state = ESnormal; |
| return; |
| default: |
| vc->vc_state = ESnormal; |
| } |
| } |
| |
| /* This is a temporary buffer used to prepare a tty console write |
| * so that we can easily avoid touching user space while holding the |
| * console spinlock. It is allocated in con_init and is shared by |
| * this code and the vc_screen read/write tty calls. |
| * |
| * We have to allocate this statically in the kernel data section |
| * since console_init (and thus con_init) are called before any |
| * kernel memory allocation is available. |
| */ |
| char con_buf[CON_BUF_SIZE]; |
| DEFINE_MUTEX(con_buf_mtx); |
| |
| /* is_double_width() is based on the wcwidth() implementation by |
| * Markus Kuhn -- 2007-05-26 (Unicode 5.0) |
| * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c |
| */ |
| struct interval { |
| uint32_t first; |
| uint32_t last; |
| }; |
| |
| static int bisearch(uint32_t ucs, const struct interval *table, int max) |
| { |
| int min = 0; |
| int mid; |
| |
| if (ucs < table[0].first || ucs > table[max].last) |
| return 0; |
| while (max >= min) { |
| mid = (min + max) / 2; |
| if (ucs > table[mid].last) |
| min = mid + 1; |
| else if (ucs < table[mid].first) |
| max = mid - 1; |
| else |
| return 1; |
| } |
| return 0; |
| } |
| |
| static int is_double_width(uint32_t ucs) |
| { |
| static const struct interval double_width[] = { |
| { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E }, |
| { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF }, |
| { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, |
| { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD } |
| }; |
| return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1); |
| } |
| |
| /* acquires console_sem */ |
| static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) |
| { |
| #ifdef VT_BUF_VRAM_ONLY |
| #define FLUSH do { } while(0); |
| #else |
| #define FLUSH if (draw_x >= 0) { \ |
| vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \ |
| draw_x = -1; \ |
| } |
| #endif |
| |
| int c, tc, ok, n = 0, draw_x = -1; |
| unsigned int currcons; |
| unsigned long draw_from = 0, draw_to = 0; |
| struct vc_data *vc; |
| unsigned char vc_attr; |
| struct vt_notifier_param param; |
| uint8_t rescan; |
| uint8_t inverse; |
| uint8_t width; |
| u16 himask, charmask; |
| |
| if (in_interrupt()) |
| return count; |
| |
| might_sleep(); |
| |
| acquire_console_sem(); |
| vc = tty->driver_data; |
| if (vc == NULL) { |
| printk(KERN_ERR "vt: argh, driver_data is NULL !\n"); |
| release_console_sem(); |
| return 0; |
| } |
| |
| currcons = vc->vc_num; |
| if (!vc_cons_allocated(currcons)) { |
| /* could this happen? */ |
| printk_once("con_write: tty %d not allocated\n", currcons+1); |
| release_console_sem(); |
| return 0; |
| } |
| |
| himask = vc->vc_hi_font_mask; |
| charmask = himask ? 0x1ff : 0xff; |
| |
| /* undraw cursor first */ |
| if (IS_FG(vc)) |
| hide_cursor(vc); |
| |
| param.vc = vc; |
| |
| while (!tty->stopped && count) { |
| int orig = *buf; |
| c = orig; |
| buf++; |
| n++; |
| count--; |
| rescan = 0; |
| inverse = 0; |
| width = 1; |
| |
| /* Do no translation at all in control states */ |
| if (vc->vc_state != ESnormal) { |
| tc = c; |
| } else if (vc->vc_utf && !vc->vc_disp_ctrl) { |
| /* Combine UTF-8 into Unicode in vc_utf_char. |
| * vc_utf_count is the number of continuation bytes still |
| * expected to arrive. |
| * vc_npar is the number of continuation bytes arrived so |
| * far |
| */ |
| rescan_last_byte: |
| if ((c & 0xc0) == 0x80) { |
| /* Continuation byte received */ |
| static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff }; |
| if (vc->vc_utf_count) { |
| vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); |
| vc->vc_npar++; |
| if (--vc->vc_utf_count) { |
| /* Still need some bytes */ |
| continue; |
| } |
| /* Got a whole character */ |
| c = vc->vc_utf_char; |
| /* Reject overlong sequences */ |
| if (c <= utf8_length_changes[vc->vc_npar - 1] || |
| c > utf8_length_changes[vc->vc_npar]) |
| c = 0xfffd; |
| } else { |
| /* Unexpected continuation byte */ |
| vc->vc_utf_count = 0; |
| c = 0xfffd; |
| } |
| } else { |
| /* Single ASCII byte or first byte of a sequence received */ |
| if (vc->vc_utf_count) { |
| /* Continuation byte expected */ |
| rescan = 1; |
| vc->vc_utf_count = 0; |
| c = 0xfffd; |
| } else if (c > 0x7f) { |
| /* First byte of a multibyte sequence received */ |
| vc->vc_npar = 0; |
| if ((c & 0xe0) == 0xc0) { |
| vc->vc_utf_count = 1; |
| vc->vc_utf_char = (c & 0x1f); |
| } else if ((c & 0xf0) == 0xe0) { |
| vc->vc_utf_count = 2; |
| vc->vc_utf_char = (c & 0x0f); |
| } else if ((c & 0xf8) == 0xf0) { |
| vc->vc_utf_count = 3; |
| vc->vc_utf_char = (c & 0x07); |
| } else if ((c & 0xfc) == 0xf8) { |
| vc->vc_utf_count = 4; |
| vc->vc_utf_char = (c & 0x03); |
| } else if ((c & 0xfe) == 0xfc) { |
| vc->vc_utf_count = 5; |
| vc->vc_utf_char = (c & 0x01); |
| } else { |
| /* 254 and 255 are invalid */ |
| c = 0xfffd; |
| } |
| if (vc->vc_utf_count) { |
| /* Still need some bytes */ |
| continue; |
| } |
| } |
| /* Nothing to do if an ASCII byte was received */ |
| } |
| /* End of UTF-8 decoding. */ |
| /* c is the received character, or U+FFFD for invalid sequences. */ |
| /* Replace invalid Unicode code points with U+FFFD too */ |
| if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff) |
| c = 0xfffd; |
| tc = c; |
| } else { /* no utf or alternate charset mode */ |
| tc = vc_translate(vc, c); |
| } |
| |
| param.c = tc; |
| if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE, |
| ¶m) == NOTIFY_STOP) |
| continue; |
| |
| /* If the original code was a control character we |
| * only allow a glyph to be displayed if the code is |
| * not normally used (such as for cursor movement) or |
| * if the disp_ctrl mode has been explicitly enabled. |
| * Certain characters (as given by the CTRL_ALWAYS |
| * bitmap) are always displayed as control characters, |
| * as the console would be pretty useless without |
| * them; to display an arbitrary font position use the |
| * direct-to-font zone in UTF-8 mode. |
| */ |
| ok = tc && (c >= 32 || |
| !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 : |
| vc->vc_utf || ((CTRL_ACTION >> c) & 1))) |
| && (c != 127 || vc->vc_disp_ctrl) |
| && (c != 128+27); |
| |
| if (vc->vc_state == ESnormal && ok) { |
| if (vc->vc_utf && !vc->vc_disp_ctrl) { |
| if (is_double_width(c)) |
| width = 2; |
| } |
| /* Now try to find out how to display it */ |
| tc = conv_uni_to_pc(vc, tc); |
| if (tc & ~charmask) { |
| if (tc == -1 || tc == -2) { |
| continue; /* nothing to display */ |
| } |
| /* Glyph not found */ |
| if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { |
| /* In legacy mode use the glyph we get by a 1:1 mapping. |
| This would make absolutely no sense with Unicode in mind, |
| but do this for ASCII characters since a font may lack |
| Unicode mapping info and we don't want to end up with |
| having question marks only. */ |
| tc = c; |
| } else { |
| /* Display U+FFFD. If it's not found, display an inverse question mark. */ |
| tc = conv_uni_to_pc(vc, 0xfffd); |
| if (tc < 0) { |
| inverse = 1; |
| tc = conv_uni_to_pc(vc, '?'); |
| if (tc < 0) tc = '?'; |
| } |
| } |
| } |
| |
| if (!inverse) { |
| vc_attr = vc->vc_attr; |
| } else { |
| /* invert vc_attr */ |
| if (!vc->vc_can_do_color) { |
| vc_attr = (vc->vc_attr) ^ 0x08; |
| } else if (vc->vc_hi_font_mask == 0x100) { |
| vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4); |
| } else { |
| vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4); |
| } |
| FLUSH |
| } |
| |
| while (1) { |
| if (vc->vc_need_wrap || vc->vc_decim) |
| FLUSH |
| if (vc->vc_need_wrap) { |
| cr(vc); |
| lf(vc); |
| } |
| if (vc->vc_decim) |
| insert_char(vc, 1); |
| scr_writew(himask ? |
| ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : |
| (vc_attr << 8) + tc, |
| (u16 *) vc->vc_pos); |
| if (DO_UPDATE(vc) && draw_x < 0) { |
| draw_x = vc->vc_x; |
| draw_from = vc->vc_pos; |
| } |
| if (vc->vc_x == vc->vc_cols - 1) { |
| vc->vc_need_wrap = vc->vc_decawm; |
| draw_to = vc->vc_pos + 2; |
| } else { |
| vc->vc_x++; |
| draw_to = (vc->vc_pos += 2); |
| } |
| |
| if (!--width) break; |
| |
| tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */ |
| if (tc < 0) tc = ' '; |
| } |
| notify_write(vc, c); |
| |
| if (inverse) { |
| FLUSH |
| } |
| |
| if (rescan) { |
| rescan = 0; |
| inverse = 0; |
| width = 1; |
| c = orig; |
| goto rescan_last_byte; |
| } |
| continue; |
| } |
| FLUSH |
| do_con_trol(tty, vc, orig); |
| } |
| FLUSH |
| console_conditional_schedule(); |
| release_console_sem(); |
| notify_update(vc); |
| return n; |
| #undef FLUSH |
| } |
| |
| /* |
| * This is the console switching callback. |
| * |
| * Doing console switching in a process context allows |
| * us to do the switches asynchronously (needed when we want |
| * to switch due to a keyboard interrupt). Synchronization |
| * with other console code and prevention of re-entrancy is |
| * ensured with console_sem. |
| */ |
| static void console_callback(struct work_struct *ignored) |
| { |
| acquire_console_sem(); |
| |
| if (want_console >= 0) { |
| if (want_console != fg_console && |
| vc_cons_allocated(want_console)) { |
| hide_cursor(vc_cons[fg_console].d); |
| change_console(vc_cons[want_console].d); |
| /* we only changed when the console had already |
| been allocated - a new console is not created |
| in an interrupt routine */ |
| } |
| want_console = -1; |
| } |
| if (do_poke_blanked_console) { /* do not unblank for a LED change */ |
| do_poke_blanked_console = 0; |
| poke_blanked_console(); |
| } |
| if (scrollback_delta) { |
| struct vc_data *vc = vc_cons[fg_console].d; |
| clear_selection(); |
| if (vc->vc_mode == KD_TEXT) |
| vc->vc_sw->con_scrolldelta(vc, scrollback_delta); |
| scrollback_delta = 0; |
| } |
| if (blank_timer_expired) { |
| do_blank_screen(0); |
| blank_timer_expired = 0; |
| } |
| notify_update(vc_cons[fg_console].d); |
| |
| release_console_sem(); |
| } |
| |
| int set_console(int nr) |
| { |
| struct vc_data *vc = vc_cons[fg_console].d; |
| |
| if (!vc_cons_allocated(nr) || vt_dont_switch || |
| (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) { |
| |
| /* |
| * Console switch will fail in console_callback() or |
| * change_console() so there is no point scheduling |
| * the callback |
| * |
| * Existing set_console() users don't check the return |
| * value so this shouldn't break anything |
| */ |
| return -EINVAL; |
| } |
| |
| want_console = nr; |
| schedule_console_callback(); |
| |
| return 0; |
| } |
| |
| struct tty_driver *console_driver; |
| |
| #ifdef CONFIG_VT_CONSOLE |
| |
| /** |
| * vt_kmsg_redirect() - Sets/gets the kernel message console |
| * @new: The new virtual terminal number or -1 if the console should stay |
| * unchanged |
| * |
| * By default, the kernel messages are always printed on the current virtual |
| * console. However, the user may modify that default with the |
| * TIOCL_SETKMSGREDIRECT ioctl call. |
| * |
| * This function sets the kernel message console to be @new. It returns the old |
| * virtual console number. The virtual terminal number 0 (both as parameter and |
| * return value) means no redirection (i.e. always printed on the currently |
| * active console). |
| * |
| * The parameter -1 means that only the current console is returned, but the |
| * value is not modified. You may use the macro vt_get_kmsg_redirect() in that |
| * case to make the code more understandable. |
| * |
| * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores |
| * the parameter and always returns 0. |
| */ |
| int vt_kmsg_redirect(int new) |
| { |
| static int kmsg_con; |
| |
| if (new != -1) |
| return xchg(&kmsg_con, new); |
| else |
| return kmsg_con; |
| } |
| |
| /* |
| * Console on virtual terminal |
| * |
| * The console must be locked when we get here. |
| */ |
| |
| static void vt_console_print(struct console *co, const char *b, unsigned count) |
| { |
| struct vc_data *vc = vc_cons[fg_console].d; |
| unsigned char c; |
| static DEFINE_SPINLOCK(printing_lock); |
| const ushort *start; |
| ushort cnt = 0; |
| ushort myx; |
| int kmsg_console; |
| |
| /* console busy or not yet initialized */ |
| if (!printable) |
| return; |
| if (!spin_trylock(&printing_lock)) |
| return; |
| |
| kmsg_console = vt_get_kmsg_redirect(); |
| if (kmsg_console && vc_cons_allocated(kmsg_console - 1)) |
| vc = vc_cons[kmsg_console - 1].d; |
| |
| /* read `x' only after setting currcons properly (otherwise |
| the `x' macro will read the x of the foreground console). */ |
| myx = vc->vc_x; |
| |
| if (!vc_cons_allocated(fg_console)) { |
| /* impossible */ |
| /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ |
| goto quit; |
| } |
| |
| if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) |
| goto quit; |
| |
| /* undraw cursor first */ |
| if (IS_FG(vc)) |
| hide_cursor(vc); |
| |
| start = (ushort *)vc->vc_pos; |
| |
| /* Contrived structure to try to emulate original need_wrap behaviour |
| * Problems caused when we have need_wrap set on '\n' character */ |
| while (count--) { |
| c = *b++; |
| if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { |
| if (cnt > 0) { |
| if (CON_IS_VISIBLE(vc)) |
| vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); |
| vc->vc_x += cnt; |
| if (vc->vc_need_wrap) |
| vc->vc_x--; |
| cnt = 0; |
| } |
| if (c == 8) { /* backspace */ |
| bs(vc); |
| start = (ushort *)vc->vc_pos; |
| myx = vc->vc_x; |
| continue; |
| } |
| if (c != 13) |
| lf(vc); |
| cr(vc); |
| start = (ushort *)vc->vc_pos; |
| myx = vc->vc_x; |
| if (c == 10 || c == 13) |
| continue; |
| } |
| scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); |
| notify_write(vc, c); |
| cnt++; |
| if (myx == vc->vc_cols - 1) { |
| vc->vc_need_wrap = 1; |
| continue; |
| } |
| vc->vc_pos += 2; |
| myx++; |
| } |
| if (cnt > 0) { |
| if (CON_IS_VISIBLE(vc)) |
| vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); |
| vc->vc_x += cnt; |
| if (vc->vc_x == vc->vc_cols) { |
| vc->vc_x--; |
| vc->vc_need_wrap = 1; |
| } |
| } |
| set_cursor(vc); |
| notify_update(vc); |
| |
| quit: |
| spin_unlock(&printing_lock); |
| } |
| |
| static struct tty_driver *vt_console_device(struct console *c, int *index) |
| { |
| *index = c->index ? c->index-1 : fg_console; |
| return console_driver; |
| } |
| |
| static struct console vt_console_driver = { |
| .name = "tty", |
| .write = vt_console_print, |
| .device = vt_console_device, |
| .unblank = unblank_screen, |
| .flags = CON_PRINTBUFFER, |
| .index = -1, |
| }; |
| #endif |
| |
| /* |
| * Handling of Linux-specific VC ioctls |
| */ |
| |
| /* |
| * Generally a bit racy with respect to console_sem(). |
| * |
| * There are some functions which don't need it. |
| * |
| * There are some functions which can sleep for arbitrary periods |
| * (paste_selection) but we don't need the lock there anyway. |
| * |
| * set_selection has locking, and definitely needs it |
| */ |
| |
| int tioclinux(struct tty_struct *tty, unsigned long arg) |
| { |
| char type, data; |
| char __user *p = (char __user *)arg; |
| int lines; |
| int ret; |
| |
| if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| if (get_user(type, p)) |
| return -EFAULT; |
| ret = 0; |
| |
| switch (type) |
| { |
| case TIOCL_SETSEL: |
| acquire_console_sem(); |
| ret = set_selection((struct tiocl_selection __user *)(p+1), tty); |
| release_console_sem(); |
| break; |
| case TIOCL_PASTESEL: |
| ret = paste_selection(tty); |
| break; |
| case TIOCL_UNBLANKSCREEN: |
| acquire_console_sem(); |
| unblank_screen(); |
| release_console_sem(); |
| break; |
| case TIOCL_SELLOADLUT: |
| ret = sel_loadlut(p); |
| break; |
| case TIOCL_GETSHIFTSTATE: |
| |
| /* |
| * Make it possible to react to Shift+Mousebutton. |
| * Note that 'shift_state' is an undocumented |
| * kernel-internal variable; programs not closely |
| * related to the kernel should not use this. |
| */ |
| data = shift_state; |
| ret = __put_user(data, p); |
| break; |
| case TIOCL_GETMOUSEREPORTING: |
| data = mouse_reporting(); |
| ret = __put_user(data, p); |
| break; |
| case TIOCL_SETVESABLANK: |
| ret = set_vesa_blanking(p); |
| break; |
| case TIOCL_GETKMSGREDIRECT: |
| data = vt_get_kmsg_redirect(); |
| ret = __put_user(data, p); |
| break; |
| case TIOCL_SETKMSGREDIRECT: |
| if (!capable(CAP_SYS_ADMIN)) { |
| ret = -EPERM; |
| } else { |
| if (get_user(data, p+1)) |
| ret = -EFAULT; |
| else |
| vt_kmsg_redirect(data); |
| } |
| break; |
| case TIOCL_GETFGCONSOLE: |
| ret = fg_console; |
| break; |
| case TIOCL_SCROLLCONSOLE: |
| if (get_user(lines, (s32 __user *)(p+4))) { |
| ret = -EFAULT; |
| } else { |
| scrollfront(vc_cons[fg_console].d, lines); |
| ret = 0; |
| } |
| break; |
| case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ |
| acquire_console_sem(); |
| ignore_poke = 1; |
| do_blank_screen(0); |
| release_console_sem(); |
| break; |
| case TIOCL_BLANKEDSCREEN: |
| ret = console_blanked; |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| return ret; |
| } |
| |
| /* |
| * /dev/ttyN handling |
| */ |
| |
| static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) |
| { |
| int retval; |
| |
| retval = do_con_write(tty, buf, count); |
| con_flush_chars(tty); |
| |
| return retval; |
| } |
| |
| static int con_put_char(struct tty_struct *tty, unsigned char ch) |
| { |
| if (in_interrupt()) |
| return 0; /* n_r3964 calls put_char() from interrupt context */ |
| return do_con_write(tty, &ch, 1); |
| } |
| |
| static int con_write_room(struct tty_struct *tty) |
| { |
| if (tty->stopped) |
| return 0; |
| return 32768; /* No limit, really; we're not buffering */ |
| } |
| |
| static int con_chars_in_buffer(struct tty_struct *tty) |
| { |
| return 0; /* we're not buffering */ |
| } |
| |
| /* |
| * con_throttle and con_unthrottle are only used for |
| * paste_selection(), which has to stuff in a large number of |
| * characters... |
| */ |
| static void con_throttle(struct tty_struct *tty) |
| { |
| } |
| |
| static void con_unthrottle(struct tty_struct *tty) |
| { |
| struct vc_data *vc = tty->driver_data; |
| |
| wake_up_interruptible(&vc->paste_wait); |
| } |
| |
| /* |
| * Turn the Scroll-Lock LED on when the tty is stopped |
| */ |
| static void con_stop(struct tty_struct *tty) |
| { |
| int console_num; |
| if (!tty) |
| return; |
| console_num = tty->index; |
| if (!vc_cons_allocated(console_num)) |
| return; |
| set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); |
| set_leds(); |
| } |
| |
| /* |
| * Turn the Scroll-Lock LED off when the console is started |
| */ |
| static void con_start(struct tty_struct *tty) |
| { |
| int console_num; |
| if (!tty) |
| return; |
| console_num = tty->index; |
| if (!vc_cons_allocated(console_num)) |
| return; |
| clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); |
| set_leds(); |
| } |
| |
| static void con_flush_chars(struct tty_struct *tty) |
| { |
| struct vc_data *vc; |
| |
| if (in_interrupt()) /* from flush_to_ldisc */ |
| return; |
| |
| /* if we race with con_close(), vt may be null */ |
| acquire_console_sem(); |
| vc = tty->driver_data; |
| if (vc) |
| set_cursor(vc); |
| release_console_sem(); |
| } |
| |
| /* |
| * Allocate the console screen memory. |
| */ |
| static int con_open(struct tty_struct *tty, struct file *filp) |
| { |
| unsigned int currcons = tty->index; |
| int ret = 0; |
| |
| acquire_console_sem(); |
| if (tty->driver_data == NULL) { |
| ret = vc_allocate(currcons); |
| if (ret == 0) { |
| struct vc_data *vc = vc_cons[currcons].d; |
| |
| /* Still being freed */ |
| if (vc->vc_tty) { |
| release_console_sem(); |
| return -ERESTARTSYS; |
| } |
| tty->driver_data = vc; |
| vc->vc_tty = tty; |
| |
| if (!tty->winsize.ws_row && !tty->winsize.ws_col) { |
| tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; |
| tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; |
| } |
| if (vc->vc_utf) |
| tty->termios->c_iflag |= IUTF8; |
| else |
| tty->termios->c_iflag &= ~IUTF8; |
| release_console_sem(); |
| return ret; |
| } |
| } |
| release_console_sem(); |
| return ret; |
| } |
| |
| static void con_close(struct tty_struct *tty, struct file *filp) |
| { |
| /* Nothing to do - we defer to shutdown */ |
| } |
| |
| static void con_shutdown(struct tty_struct *tty) |
| { |
| struct vc_data *vc = tty->driver_data; |
| BUG_ON(vc == NULL); |
| acquire_console_sem(); |
| vc->vc_tty = NULL; |
| release_console_sem(); |
| tty_shutdown(tty); |
| } |
| |
| static int default_italic_color = 2; // green (ASCII) |
| static int default_underline_color = 3; // cyan (ASCII) |
| module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); |
| module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); |
| |
| static void vc_init(struct vc_data *vc, unsigned int rows, |
| unsigned int cols, int do_clear) |
| { |
| int j, k ; |
| |
| vc->vc_cols = cols; |
| vc->vc_rows = rows; |
| vc->vc_size_row = cols << 1; |
| vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; |
| |
| set_origin(vc); |
| vc->vc_pos = vc->vc_origin; |
| reset_vc(vc); |
| for (j=k=0; j<16; j++) { |
| vc->vc_palette[k++] = default_red[j] ; |
| vc->vc_palette[k++] = default_grn[j] ; |
| vc->vc_palette[k++] = default_blu[j] ; |
| } |
| vc->vc_def_color = 0x07; /* white */ |
| vc->vc_ulcolor = default_underline_color; |
| vc->vc_itcolor = default_italic_color; |
| vc->vc_halfcolor = 0x08; /* grey */ |
| init_waitqueue_head(&vc->paste_wait); |
| reset_terminal(vc, do_clear); |
| } |
| |
| /* |
| * This routine initializes console interrupts, and does nothing |
| * else. If you want the screen to clear, call tty_write with |
| * the appropriate escape-sequence. |
| */ |
| |
| static int __init con_init(void) |
| { |
| const char *display_desc = NULL; |
| struct vc_data *vc; |
| unsigned int currcons = 0, i; |
| |
| acquire_console_sem(); |
| |
| if (conswitchp) |
| display_desc = conswitchp->con_startup(); |
| if (!display_desc) { |
| fg_console = 0; |
| release_console_sem(); |
| return 0; |
| } |
| |
| for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
| struct con_driver *con_driver = ®istered_con_driver[i]; |
| |
| if (con_driver->con == NULL) { |
| con_driver->con = conswitchp; |
| con_driver->desc = display_desc; |
| con_driver->flag = CON_DRIVER_FLAG_INIT; |
| con_driver->first = 0; |
| con_driver->last = MAX_NR_CONSOLES - 1; |
| break; |
| } |
| } |
| |
| for (i = 0; i < MAX_NR_CONSOLES; i++) |
| con_driver_map[i] = conswitchp; |
| |
| if (blankinterval) { |
| blank_state = blank_normal_wait; |
| mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
| } |
| |
| for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { |
| vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT); |
| INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); |
| visual_init(vc, currcons, 1); |
| vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT); |
| vc_init(vc, vc->vc_rows, vc->vc_cols, |
| currcons || !vc->vc_sw->con_save_screen); |
| } |
| currcons = fg_console = 0; |
| master_display_fg = vc = vc_cons[currcons].d; |
| set_origin(vc); |
| save_screen(vc); |
| gotoxy(vc, vc->vc_x, vc->vc_y); |
| csi_J(vc, 0); |
| update_screen(vc); |
| printk("Console: %s %s %dx%d", |
| vc->vc_can_do_color ? "colour" : "mono", |
| display_desc, vc->vc_cols, vc->vc_rows); |
| printable = 1; |
| printk("\n"); |
| |
| release_console_sem(); |
| |
| #ifdef CONFIG_VT_CONSOLE |
| register_console(&vt_console_driver); |
| #endif |
| return 0; |
| } |
| console_initcall(con_init); |
| |
| static const struct tty_operations con_ops = { |
| .open = con_open, |
| .close = con_close, |
| .write = con_write, |
| .write_room = con_write_room, |
| .put_char = con_put_char, |
| .flush_chars = con_flush_chars, |
| .chars_in_buffer = con_chars_in_buffer, |
| .ioctl = vt_ioctl, |
| #ifdef CONFIG_COMPAT |
| .compat_ioctl = vt_compat_ioctl, |
| #endif |
| .stop = con_stop, |
| .start = con_start, |
| .throttle = con_throttle, |
| .unthrottle = con_unthrottle, |
| .resize = vt_resize, |
| .shutdown = con_shutdown |
| }; |
| |
| static struct cdev vc0_cdev; |
| |
| int __init vty_init(const struct file_operations *console_fops) |
| { |
| cdev_init(&vc0_cdev, console_fops); |
| if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) || |
| register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0) |
| panic("Couldn't register /dev/tty0 driver\n"); |
| device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0"); |
| |
| vcs_init(); |
| |
| console_driver = alloc_tty_driver(MAX_NR_CONSOLES); |
| if (!console_driver) |
| panic("Couldn't allocate console driver\n"); |
| console_driver->owner = THIS_MODULE; |
| console_driver->name = "tty"; |
| console_driver->name_base = 1; |
| console_driver->major = TTY_MAJOR; |
| console_driver->minor_start = 1; |
| console_driver->type = TTY_DRIVER_TYPE_CONSOLE; |
| console_driver->init_termios = tty_std_termios; |
| if (default_utf8) |
| console_driver->init_termios.c_iflag |= IUTF8; |
| console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; |
| tty_set_operations(console_driver, &con_ops); |
| if (tty_register_driver(console_driver)) |
| panic("Couldn't register console driver\n"); |
| kbd_init(); |
| console_map_init(); |
| #ifdef CONFIG_MDA_CONSOLE |
| mda_console_init(); |
| #endif |
| return 0; |
| } |
| |
| #ifndef VT_SINGLE_DRIVER |
| |
| static struct class *vtconsole_class; |
| |
| static int bind_con_driver(const struct consw *csw, int first, int last, |
| int deflt) |
| { |
| struct module *owner = csw->owner; |
| const char *desc = NULL; |
| struct con_driver *con_driver; |
| int i, j = -1, k = -1, retval = -ENODEV; |
| |
| if (!try_module_get(owner)) |
| return -ENODEV; |
| |
| acquire_console_sem(); |
| |
| /* check if driver is registered */ |
| for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
| con_driver = ®istered_con_driver[i]; |
| |
| if (con_driver->con == csw) { |
| desc = con_driver->desc; |
| retval = 0; |
| break; |
| } |
| } |
| |
| if (retval) |
| goto err; |
| |
| if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) { |
| csw->con_startup(); |
| con_driver->flag |= CON_DRIVER_FLAG_INIT; |
| } |
| |
| if (deflt) { |
| if (conswitchp) |
| module_put(conswitchp->owner); |
| |
| __module_get(owner); |
| conswitchp = csw; |
| } |
| |
| first = max(first, con_driver->first); |
| last = min(last, con_driver->last); |
| |
| for (i = first; i <= last; i++) { |
| int old_was_color; |
| struct vc_data *vc = vc_cons[i].d; |
| |
| if (con_driver_map[i]) |
| module_put(con_driver_map[i]->owner); |
| __module_get(owner); |
| con_driver_map[i] = csw; |
| |
| if (!vc || !vc->vc_sw) |
| continue; |
| |
| j = i; |
| |
| if (CON_IS_VISIBLE(vc)) { |
| k = i; |
| save_screen(vc); |
| } |
| |
| old_was_color = vc->vc_can_do_color; |
| vc->vc_sw->con_deinit(vc); |
| if (!vc->vc_origin) |
| vc->vc_origin = (unsigned long)vc->vc_screenbuf; |
| visual_init(vc, i, 0); |
| set_origin(vc); |
| update_attr(vc); |
| |
| /* If the console changed between mono <-> color, then |
| * the attributes in the screenbuf will be wrong. The |
| * following resets all attributes to something sane. |
| */ |
| if (old_was_color != vc->vc_can_do_color) |
| clear_buffer_attributes(vc); |
| } |
| |
| printk("Console: switching "); |
| if (!deflt) |
| printk("consoles %d-%d ", first+1, last+1); |
| if (j >= 0) { |
| struct vc_data *vc = vc_cons[j].d; |
| |
| printk("to %s %s %dx%d\n", |
| vc->vc_can_do_color ? "colour" : "mono", |
| desc, vc->vc_cols, vc->vc_rows); |
| |
| if (k >= 0) { |
| vc = vc_cons[k].d; |
| update_screen(vc); |
| } |
| } else |
| printk("to %s\n", desc); |
| |
| retval = 0; |
| err: |
| release_console_sem(); |
| module_put(owner); |
| return retval; |
| }; |
| |
| #ifdef CONFIG_VT_HW_CONSOLE_BINDING |
| static int con_is_graphics(const struct consw *csw, int first, int last) |
| { |
| int i, retval = 0; |
| |
| for (i = first; i <= last; i++) { |
| struct vc_data *vc = vc_cons[i].d; |
| |
| if (vc && vc->vc_mode == KD_GRAPHICS) { |
| retval = 1; |
| break; |
| } |
| } |
| |
| return retval; |
| } |
| |
| /** |
| * unbind_con_driver - unbind a console driver |
| * @csw: pointer to console driver to unregister |
| * @first: first in range of consoles that @csw should be unbound from |
| * @last: last in range of consoles that @csw should be unbound from |
| * @deflt: should next bound console driver be default after @csw is unbound? |
| * |
| * To unbind a driver from all possible consoles, pass 0 as @first and |
| * %MAX_NR_CONSOLES as @last. |
| * |
| * @deflt controls whether the console that ends up replacing @csw should be |
| * the default console. |
| * |
| * RETURNS: |
| * -ENODEV if @csw isn't a registered console driver or can't be unregistered |
| * or 0 on success. |
| */ |
| int unbind_con_driver(const struct consw *csw, int first, int last, int deflt) |
| { |
| struct module *owner = csw->owner; |
| const struct consw *defcsw = NULL; |
| struct con_driver *con_driver = NULL, *con_back = NULL; |
| int i, retval = -ENODEV; |
| |
| if (!try_module_get(owner)) |
| return -ENODEV; |
| |
| acquire_console_sem(); |
| |
| /* check if driver is registered and if it is unbindable */ |
| for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
| con_driver = ®istered_con_driver[i]; |
| |
| if (con_driver->con == csw && |
| con_driver->flag & CON_DRIVER_FLAG_MODULE) { |
| retval = 0; |
| break; |
| } |
| } |
| |
| if (retval) { |
| release_console_sem(); |
| goto err; |
| } |
| |
| retval = -ENODEV; |
| |
| /* check if backup driver exists */ |
| for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
| con_back = ®istered_con_driver[i]; |
| |
| if (con_back->con && |
| !(con_back->flag & CON_DRIVER_FLAG_MODULE)) { |
| defcsw = con_back->con; |
| retval = 0; |
| break; |
| } |
| } |
| |
| if (retval) { |
| release_console_sem(); |
| goto err; |
| } |
| |
| if (!con_is_bound(csw)) { |
| release_console_sem(); |
| goto err; |
| } |
| |
| first = max(first, con_driver->first); |
| last = min(last, con_driver->last); |
| |
| for (i = first; i <= last; i++) { |
| if (con_driver_map[i] == csw) { |
| module_put(csw->owner); |
| con_driver_map[i] = NULL; |
| } |
| } |
| |
| if (!con_is_bound(defcsw)) { |
| const struct consw *defconsw = conswitchp; |
| |
| defcsw->con_startup(); |
| con_back->flag |= CON_DRIVER_FLAG_INIT; |
| /* |
| * vgacon may change the default driver to point |
| * to dummycon, we restore it here... |
| */ |
| conswitchp = defconsw; |
| } |
| |
| if (!con_is_bound(csw)) |
| con_driver->flag &= ~CON_DRIVER_FLAG_INIT; |
| |
| release_console_sem(); |
| /* ignore return value, binding should not fail */ |
| bind_con_driver(defcsw, first, last, deflt); |
| err: |
| module_put(owner); |
| return retval; |
| |
| } |
| EXPORT_SYMBOL(unbind_con_driver); |
| |
| static int vt_bind(struct con_driver *con) |
| { |
| const struct consw *defcsw = NULL, *csw = NULL; |
| int i, more = 1, first = -1, last = -1, deflt = 0; |
| |
| if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || |
| con_is_graphics(con->con, con->first, con->last)) |
| goto err; |
| |
| csw = con->con; |
| |
| for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
| struct con_driver *con = ®istered_con_driver[i]; |
| |
| if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) { |
| defcsw = con->con; |
| break; |
| } |
| } |
| |
| if (!defcsw) |
| goto err; |
| |
| while (more) { |
| more = 0; |
| |
| for (i = con->first; i <= con->last; i++) { |
| if (con_driver_map[i] == defcsw) { |
| if (first == -1) |
| first = i; |
| last = i; |
| more = 1; |
| } else if (first != -1) |
| break; |
| } |
| |
| if (first == 0 && last == MAX_NR_CONSOLES -1) |
| deflt = 1; |
| |
| if (first != -1) |
| bind_con_driver(csw, first, last, deflt); |
| |
| first = -1; |
| last = -1; |
| deflt = 0; |
| } |
| |
| err: |
| return 0; |
| } |
| |
| static int vt_unbind(struct con_driver *con) |
| { |
| const struct consw *csw = NULL; |
| int i, more = 1, first = -1, last = -1, deflt = 0; |
| |
| if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || |
| con_is_graphics(con->con, con->first, con->last)) |
| goto err; |
| |
| csw = con->con; |
| |
| while (more) { |
| more = 0; |
| |
| for (i = con->first; i <= con->last; i++) { |
| if (con_driver_map[i] == csw) { |
| if (first == -1) |
| first = i; |
| last = i; |
| more = 1; |
| } else if (first != -1) |
| break; |
| } |
| |
| if (first == 0 && last == MAX_NR_CONSOLES -1) |
| deflt = 1; |
| |
| if (first != -1) |
| unbind_con_driver(csw, first, last, deflt); |
| |
| first = -1; |
| last = -1; |
| deflt = 0; |
| } |
| |
| err: |
| return 0; |
| } |
| #else |
| static inline int vt_bind(struct con_driver *con) |
| { |
| return 0; |
| } |
| static inline int vt_unbind(struct con_driver *con) |
| { |
| return 0; |
| } |
| #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ |
| |
| static ssize_t store_bind(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct con_driver *con = dev_get_drvdata(dev); |
| int bind = simple_strtoul(buf, NULL, 0); |
| |
| if (bind) |
| vt_bind(con); |
| else |
| vt_unbind(con); |
| |
| return count; |
| } |
| |
| static ssize_t show_bind(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct con_driver *con = dev_get_drvdata(dev); |
| int bind = con_is_bound(con->con); |
| |
| return snprintf(buf, PAGE_SIZE, "%i\n", bind); |
| } |
| |
| static ssize_t show_name(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct con_driver *con = dev_get_drvdata(dev); |
| |
| return snprintf(buf, PAGE_SIZE, "%s %s\n", |
| (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)", |
| con->desc); |
| |
| } |
| |
| static struct device_attribute device_attrs[] = { |
| __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind), |
| __ATTR(name, S_IRUGO, show_name, NULL), |
| }; |
| |
| static int vtconsole_init_device(struct con_driver *con) |
| { |
| int i; |
| int error = 0; |
| |
| con->flag |= CON_DRIVER_FLAG_ATTR; |
| dev_set_drvdata(con->dev, con); |
| for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { |
| error = device_create_file(con->dev, &device_attrs[i]); |
| if (error) |
| break; |
| } |
| |
| if (error) { |
| while (--i >= 0) |
| device_remove_file(con->dev, &device_attrs[i]); |
| con->flag &= ~CON_DRIVER_FLAG_ATTR; |
| } |
| |
| return error; |
| } |
| |
| static void vtconsole_deinit_device(struct con_driver *con) |
| { |
| int i; |
| |
| if (con->flag & CON_DRIVER_FLAG_ATTR) { |
| for (i = 0; i < ARRAY_SIZE(device_attrs); i++) |
| device_remove_file(con->dev, &device_attrs[i]); |
| con->flag &= ~CON_DRIVER_FLAG_ATTR; |
| } |
| } |
| |
| /** |
| * con_is_bound - checks if driver is bound to the console |
| * @csw: console driver |
| * |
| * RETURNS: zero if unbound, nonzero if bound |
| * |
| * Drivers can call this and if zero, they should release |
| * all resources allocated on con_startup() |
| */ |
| int con_is_bound(const struct consw *csw) |
| { |
| int i, bound = 0; |
| |
| for (i = 0; i < MAX_NR_CONSOLES; i++) { |
| if (con_driver_map[i] == csw) { |
| bound = 1; |
| break; |
| } |
| } |
| |
| return bound; |
| } |
| EXPORT_SYMBOL(con_is_bound); |
| |
| /** |
| * con_debug_enter - prepare the console for the kernel debugger |
| * @sw: console driver |
| * |
| * Called when the console is taken over by the kernel debugger, this |
| * function needs to save the current console state, then put the console |
| * into a state suitable for the kernel debugger. |
| * |
| * RETURNS: |
| * Zero on success, nonzero if a failure occurred when trying to prepare |
| * the console for the debugger. |
| */ |
| int con_debug_enter(struct vc_data *vc) |
| { |
| int ret = 0; |
| |
| saved_fg_console = fg_console; |
| saved_last_console = last_console; |
| saved_want_console = want_console; |
| saved_vc_mode = vc->vc_mode; |
| vc->vc_mode = KD_TEXT; |
| console_blanked = 0; |
| if (vc->vc_sw->con_debug_enter) |
| ret = vc->vc_sw->con_debug_enter(vc); |
| #ifdef CONFIG_KGDB_KDB |
| /* Set the initial LINES variable if it is not already set */ |
| if (vc->vc_rows < 999) { |
| int linecount; |
| char lns[4]; |
| const char *setargs[3] = { |
| "set", |
| "LINES", |
| lns, |
| }; |
| if (kdbgetintenv(setargs[0], &linecount)) { |
| snprintf(lns, 4, "%i", vc->vc_rows); |
| kdb_set(2, setargs); |
| } |
| } |
| #endif /* CONFIG_KGDB_KDB */ |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(con_debug_enter); |
| |
| /** |
| * con_debug_leave - restore console state |
| * @sw: console driver |
| * |
| * Restore the console state to what it was before the kernel debugger |
| * was invoked. |
| * |
| * RETURNS: |
| * Zero on success, nonzero if a failure occurred when trying to restore |
| * the console. |
| */ |
| int con_debug_leave(void) |
| { |
| struct vc_data *vc; |
| int ret = 0; |
| |
| fg_console = saved_fg_console; |
| last_console = saved_last_console; |
| want_console = saved_want_console; |
| vc_cons[fg_console].d->vc_mode = saved_vc_mode; |
| |
| vc = vc_cons[fg_console].d; |
| if (vc->vc_sw->con_debug_leave) |
| ret = vc->vc_sw->con_debug_leave(vc); |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(con_debug_leave); |
| |
| /** |
| * register_con_driver - register console driver to console layer |
| * @csw: console driver |
| * @first: the first console to take over, minimum value is 0 |
| * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1 |
| * |
| * DESCRIPTION: This function registers a console driver which can later |
| * bind to a range of consoles specified by @first and @last. It will |
| * also initialize the console driver by calling con_startup(). |
| */ |
| int register_con_driver(const struct consw *csw, int first, int last) |
| { |
| struct module *owner = csw->owner; |
| struct con_driver *con_driver; |
| const char *desc; |
| int i, retval = 0; |
| |
| if (!try_module_get(owner)) |
| return -ENODEV; |
| |
| acquire_console_sem(); |
| |
| for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
| con_driver = ®istered_con_driver[i]; |
| |
| /* already registered */ |
| if (con_driver->con == csw) |
| retval = -EINVAL; |
| } |
| |
| if (retval) |
| goto err; |
| |
| desc = csw->con_startup(); |
| |
| if (!desc) |
| goto err; |
| |
| retval = -EINVAL; |
| |
| for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
| con_driver = ®istered_con_driver[i]; |
| |
| if (con_driver->con == NULL) { |
| con_driver->con = csw; |
| con_driver->desc = desc; |
| con_driver->node = i; |
| con_driver->flag = CON_DRIVER_FLAG_MODULE | |
| CON_DRIVER_FLAG_INIT; |
| con_driver->first = first; |
| con_driver->last = last; |
| retval = 0; |
| break; |
| } |
| } |
| |
| if (retval) |
| goto err; |
| |
| con_driver->dev = device_create(vtconsole_class, NULL, |
| MKDEV(0, con_driver->node), |
| NULL, "vtcon%i", |
| con_driver->node); |
| |
| if (IS_ERR(con_driver->dev)) { |
| printk(KERN_WARNING "Unable to create device for %s; " |
| "errno = %ld\n", con_driver->desc, |
| PTR_ERR(con_driver->dev)); |
| con_driver->dev = NULL; |
| } else { |
| vtconsole_init_device(con_driver); |
| } |
| |
| err: |
| release_console_sem(); |
| module_put(owner); |
| return retval; |
| } |
| EXPORT_SYMBOL(register_con_driver); |
| |
| /** |
| * unregister_con_driver - unregister console driver from console layer |
| * @csw: console driver |
| * |
| * DESCRIPTION: All drivers that registers to the console layer must |
| * call this function upon exit, or if the console driver is in a state |
| * where it won't be able to handle console services, such as the |
| * framebuffer console without loaded framebuffer drivers. |
| * |
| * The driver must unbind first prior to unregistration. |
| */ |
| int unregister_con_driver(const struct consw *csw) |
| { |
| int i, retval = -ENODEV; |
| |
| acquire_console_sem(); |
| |
| /* cannot unregister a bound driver */ |
| if (con_is_bound(csw)) |
| goto err; |
| |
| for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
| struct con_driver *con_driver = ®istered_con_driver[i]; |
| |
| if (con_driver->con == csw && |
| con_driver->flag & CON_DRIVER_FLAG_MODULE) { |
| vtconsole_deinit_device(con_driver); |
| device_destroy(vtconsole_class, |
| MKDEV(0, con_driver->node)); |
| con_driver->con = NULL; |
| con_driver->desc = NULL; |
| con_driver->dev = NULL; |
| con_driver->node = 0; |
| con_driver->flag = 0; |
| con_driver->first = 0; |
| con_driver->last = 0; |
| retval = 0; |
| break; |
| } |
| } |
| err: |
| release_console_sem(); |
| return retval; |
| } |
| EXPORT_SYMBOL(unregister_con_driver); |
| |
| /* |
| * If we support more console drivers, this function is used |
| * when a driver wants to take over some existing consoles |
| * and become default driver for newly opened ones. |
| * |
| * take_over_console is basically a register followed by unbind |
| */ |
| int take_over_console(const struct consw *csw, int first, int last, int deflt) |
| { |
| int err; |
| |
| err = register_con_driver(csw, first, last); |
| |
| if (!err) |
| bind_con_driver(csw, first, last, deflt); |
| |
| return err; |
| } |
| |
| /* |
| * give_up_console is a wrapper to unregister_con_driver. It will only |
| * work if driver is fully unbound. |
| */ |
| void give_up_console(const struct consw *csw) |
| { |
| unregister_con_driver(csw); |
| } |
| |
| static int __init vtconsole_class_init(void) |
| { |
| int i; |
| |
| vtconsole_class = class_create(THIS_MODULE, "vtconsole"); |
| if (IS_ERR(vtconsole_class)) { |
| printk(KERN_WARNING "Unable to create vt console class; " |
| "errno = %ld\n", PTR_ERR(vtconsole_class)); |
| vtconsole_class = NULL; |
| } |
| |
| /* Add system drivers to sysfs */ |
| for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
| struct con_driver *con = ®istered_con_driver[i]; |
| |
| if (con->con && !con->dev) { |
| con->dev = device_create(vtconsole_class, NULL, |
| MKDEV(0, con->node), |
| NULL, "vtcon%i", |
| con->node); |
| |
| if (IS_ERR(con->dev)) { |
| printk(KERN_WARNING "Unable to create " |
| "device for %s; errno = %ld\n", |
| con->desc, PTR_ERR(con->dev)); |
| con->dev = NULL; |
| } else { |
| vtconsole_init_device(con); |
| } |
| } |
| } |
| |
| return 0; |
| } |
| postcore_initcall(vtconsole_class_init); |
| |
| #endif |
| |
| /* |
| * Screen blanking |
| */ |
| |
| static int set_vesa_blanking(char __user *p) |
| { |
| unsigned int mode; |
| |
| if (get_user(mode, p + 1)) |
| return -EFAULT; |
| |
| vesa_blank_mode = (mode < 4) ? mode : 0; |
| return 0; |
| } |
| |
| void do_blank_screen(int entering_gfx) |
| { |
| struct vc_data *vc = vc_cons[fg_console].d; |
| int i; |
| |
| WARN_CONSOLE_UNLOCKED(); |
| |
| if (console_blanked) { |
| if (blank_state == blank_vesa_wait) { |
| blank_state = blank_off; |
| vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); |
| } |
| return; |
| } |
| |
| /* entering graphics mode? */ |
| if (entering_gfx) { |
| hide_cursor(vc); |
| save_screen(vc); |
| vc->vc_sw->con_blank(vc, -1, 1); |
| console_blanked = fg_console + 1; |
| blank_state = blank_off; |
| set_origin(vc); |
| return; |
| } |
| |
| if (blank_state != blank_normal_wait) |
| return; |
| blank_state = blank_off; |
| |
| /* don't blank graphics */ |
| if (vc->vc_mode != KD_TEXT) { |
| console_blanked = fg_console + 1; |
| return; |
| } |
| |
| hide_cursor(vc); |
| del_timer_sync(&console_timer); |
| blank_timer_expired = 0; |
| |
| save_screen(vc); |
| /* In case we need to reset origin, blanking hook returns 1 */ |
| i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0); |
| console_blanked = fg_console + 1; |
| if (i) |
| set_origin(vc); |
| |
| if (console_blank_hook && console_blank_hook(1)) |
| return; |
| |
| if (vesa_off_interval && vesa_blank_mode) { |
| blank_state = blank_vesa_wait; |
| mod_timer(&console_timer, jiffies + vesa_off_interval); |
| } |
| vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num); |
| } |
| EXPORT_SYMBOL(do_blank_screen); |
| |
| /* |
| * Called by timer as well as from vt_console_driver |
| */ |
| void do_unblank_screen(int leaving_gfx) |
| { |
| struct vc_data *vc; |
| |
| /* This should now always be called from a "sane" (read: can schedule) |
| * context for the sake of the low level drivers, except in the special |
| * case of oops_in_progress |
| */ |
| if (!oops_in_progress) |
| might_sleep(); |
| |
| WARN_CONSOLE_UNLOCKED(); |
| |
| ignore_poke = 0; |
| if (!console_blanked) |
| return; |
| if (!vc_cons_allocated(fg_console)) { |
| /* impossible */ |
| printk("unblank_screen: tty %d not allocated ??\n", fg_console+1); |
| return; |
| } |
| vc = vc_cons[fg_console].d; |
| /* Try to unblank in oops case too */ |
| if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) |
| return; /* but leave console_blanked != 0 */ |
| |
| if (blankinterval) { |
| mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
| blank_state = blank_normal_wait; |
| } |
| |
| console_blanked = 0; |
| if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc)) |
| /* Low-level driver cannot restore -> do it ourselves */ |
| update_screen(vc); |
| if (console_blank_hook) |
| console_blank_hook(0); |
| set_palette(vc); |
| set_cursor(vc); |
| vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num); |
| } |
| EXPORT_SYMBOL(do_unblank_screen); |
| |
| /* |
| * This is called by the outside world to cause a forced unblank, mostly for |
| * oopses. Currently, I just call do_unblank_screen(0), but we could eventually |
| * call it with 1 as an argument and so force a mode restore... that may kill |
| * X or at least garbage the screen but would also make the Oops visible... |
| */ |
| void unblank_screen(void) |
| { |
| do_unblank_screen(0); |
| } |
| |
| /* |
| * We defer the timer blanking to work queue so it can take the console mutex |
| * (console operations can still happen at irq time, but only from printk which |
| * has the console mutex. Not perfect yet, but better than no locking |
| */ |
| static void blank_screen_t(unsigned long dummy) |
| { |
| if (unlikely(!keventd_up())) { |
| mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
| return; |
| } |
| blank_timer_expired = 1; |
| schedule_work(&console_work); |
| } |
| |
| void poke_blanked_console(void) |
| { |
| WARN_CONSOLE_UNLOCKED(); |
| |
| /* Add this so we quickly catch whoever might call us in a non |
| * safe context. Nowadays, unblank_screen() isn't to be called in |
| * atomic contexts and is allowed to schedule (with the special case |
| * of oops_in_progress, but that isn't of any concern for this |
| * function. --BenH. |
| */ |
| might_sleep(); |
| |
| /* This isn't perfectly race free, but a race here would be mostly harmless, |
| * at worse, we'll do a spurrious blank and it's unlikely |
| */ |
| del_timer(&console_timer); |
| blank_timer_expired = 0; |
| |
| if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) |
| return; |
| if (console_blanked) |
| unblank_screen(); |
| else if (blankinterval) { |
| mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
| blank_state = blank_normal_wait; |
| } |
| } |
| |
| /* |
| * Palettes |
| */ |
| |
| static void set_palette(struct vc_data *vc) |
| { |
| WARN_CONSOLE_UNLOCKED(); |
| |
| if (vc->vc_mode != KD_GRAPHICS) |
| vc->vc_sw->con_set_palette(vc, color_table); |
| } |
| |
| static int set_get_cmap(unsigned char __user *arg, int set) |
| { |
| int i, j, k; |
| |
| WARN_CONSOLE_UNLOCKED(); |
| |
| for (i = 0; i < 16; i++) |
| if (set) { |
| get_user(default_red[i], arg++); |
| get_user(default_grn[i], arg++); |
| get_user(default_blu[i], arg++); |
| } else { |
| put_user(default_red[i], arg++); |
| put_user(default_grn[i], arg++); |
| put_user(default_blu[i], arg++); |
| } |
| if (set) { |
| for (i = 0; i < MAX_NR_CONSOLES; i++) |
| if (vc_cons_allocated(i)) { |
| for (j = k = 0; j < 16; j++) { |
| vc_cons[i].d->vc_palette[k++] = default_red[j]; |
| vc_cons[i].d->vc_palette[k++] = default_grn[j]; |
| vc_cons[i].d->vc_palette[k++] = default_blu[j]; |
| } |
| set_palette(vc_cons[i].d); |
| } |
| } |
| return 0; |
| } |
| |
| /* |
| * Load palette into the DAC registers. arg points to a colour |
| * map, 3 bytes per colour, 16 colours, range from 0 to 255. |
| */ |
| |
| int con_set_cmap(unsigned char __user *arg) |
| { |
| int rc; |
| |
| acquire_console_sem(); |
| rc = set_get_cmap (arg,1); |
| release_console_sem(); |
| |
| return rc; |
| } |
| |
| int con_get_cmap(unsigned char __user *arg) |
| { |
| int rc; |
| |
| acquire_console_sem(); |
| rc = set_get_cmap (arg,0); |
| release_console_sem(); |
| |
| return rc; |
| } |
| |
| void reset_palette(struct vc_data *vc) |
| { |
| int j, k; |
| for (j=k=0; j<16; j++) { |
| vc->vc_palette[k++] = default_red[j]; |
| vc->vc_palette[k++] = default_grn[j]; |
| vc->vc_palette[k++] = default_blu[j]; |
| } |
| set_palette(vc); |
| } |
| |
| /* |
| * Font switching |
| * |
| * Currently we only support fonts up to 32 pixels wide, at a maximum height |
| * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, |
| * depending on width) reserved for each character which is kinda wasty, but |
| * this is done in order to maintain compatibility with the EGA/VGA fonts. It |
| * is upto the actual low-level console-driver convert data into its favorite |
| * format (maybe we should add a `fontoffset' field to the `display' |
| * structure so we won't have to convert the fontdata all the time. |
| * /Jes |
| */ |
| |
| #define max_font_size 65536 |
| |
| static int con_font_get(struct vc_data *vc, struct console_font_op *op) |
| { |
| struct console_font font; |
| int rc = -EINVAL; |
| int c; |
| |
| if (vc->vc_mode != KD_TEXT) |
| return -EINVAL; |
| |
| if (op->data) { |
| font.data = kmalloc(max_font_size, GFP_KERNEL); |
| if (!font.data) |
| return -ENOMEM; |
| } else |
| font.data = NULL; |
| |
| acquire_console_sem(); |
| if (vc->vc_sw->con_font_get) |
| rc = vc->vc_sw->con_font_get(vc, &font); |
| else |
| rc = -ENOSYS; |
| release_console_sem(); |
| |
| if (rc) |
| goto out; |
| |
| c = (font.width+7)/8 * 32 * font.charcount; |
| |
| if (op->data && font.charcount > op->charcount) |
| rc = -ENOSPC; |
| if (!(op->flags & KD_FONT_FLAG_OLD)) { |
| if (font.width > op->width || font.height > op->height) |
| rc = -ENOSPC; |
| } else { |
| if (font.width != 8) |
| rc = -EIO; |
| else if ((op->height && font.height > op->height) || |
| font.height > 32) |
| rc = -ENOSPC; |
| } |
| if (rc) |
| goto out; |
| |
| op->height = font.height; |
| op->width = font.width; |
| op->charcount = font.charcount; |
| |
| if (op->data && copy_to_user(op->data, font.data, c)) |
| rc = -EFAULT; |
| |
| out: |
| kfree(font.data); |
| return rc; |
| } |
| |
| static int con_font_set(struct vc_data *vc, struct console_font_op *op) |
| { |
| struct console_font font; |
| int rc = -EINVAL; |
| int size; |
| |
| if (vc->vc_mode != KD_TEXT) |
| return -EINVAL; |
| if (!op->data) |
| return -EINVAL; |
| if (op->charcount > 512) |
| return -EINVAL; |
| if (!op->height) { /* Need to guess font height [compat] */ |
| int h, i; |
| u8 __user *charmap = op->data; |
| u8 tmp; |
| |
| /* If from KDFONTOP ioctl, don't allow things which can be done in userland, |
| so that we can get rid of this soon */ |
| if (!(op->flags & KD_FONT_FLAG_OLD)) |
| return -EINVAL; |
| for (h = 32; h > 0; h--) |
| for (i = 0; i < op->charcount; i++) { |
| if (get_user(tmp, &charmap[32*i+h-1])) |
| return -EFAULT; |
| if (tmp) |
| goto nonzero; |
| } |
| return -EINVAL; |
| nonzero: |
| op->height = h; |
| } |
| if (op->width <= 0 || op->width > 32 || op->height > 32) |
| return -EINVAL; |
| size = (op->width+7)/8 * 32 * op->charcount; |
| if (size > max_font_size) |
| return -ENOSPC; |
| font.charcount = op->charcount; |
| font.height = op->height; |
| font.width = op->width; |
| font.data = memdup_user(op->data, size); |
| if (IS_ERR(font.data)) |
| return PTR_ERR(font.data); |
| acquire_console_sem(); |
| if (vc->vc_sw->con_font_set) |
| rc = vc->vc_sw->con_font_set(vc, &font, op->flags); |
| else |
| rc = -ENOSYS; |
| release_console_sem(); |
| kfree(font.data); |
| return rc; |
| } |
| |
| static int con_font_default(struct vc_data *vc, struct console_font_op *op) |
| { |
| struct console_font font = {.width = op->width, .height = op->height}; |
| char name[MAX_FONT_NAME]; |
| char *s = name; |
| int rc; |
| |
| if (vc->vc_mode != KD_TEXT) |
| return -EINVAL; |
| |
| if (!op->data) |
| s = NULL; |
| else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) |
| return -EFAULT; |
| else |
| name[MAX_FONT_NAME - 1] = 0; |
| |
| acquire_console_sem(); |
| if (vc->vc_sw->con_font_default) |
| rc = vc->vc_sw->con_font_default(vc, &font, s); |
| else |
| rc = -ENOSYS; |
| release_console_sem(); |
| if (!rc) { |
| op->width = font.width; |
| op->height = font.height; |
| } |
| return rc; |
| } |
| |
| static int con_font_copy(struct vc_data *vc, struct console_font_op *op) |
| { |
| int con = op->height; |
| int rc; |
| |
| if (vc->vc_mode != KD_TEXT) |
| return -EINVAL; |
| |
| acquire_console_sem(); |
| if (!vc->vc_sw->con_font_copy) |
| rc = -ENOSYS; |
| else if (con < 0 || !vc_cons_allocated(con)) |
| rc = -ENOTTY; |
| else if (con == vc->vc_num) /* nothing to do */ |
| rc = 0; |
| else |
| rc = vc->vc_sw->con_font_copy(vc, con); |
| release_console_sem(); |
| return rc; |
| } |
| |
| int con_font_op(struct vc_data *vc, struct console_font_op *op) |
| { |
| switch (op->op) { |
| case KD_FONT_OP_SET: |
| return con_font_set(vc, op); |
| case KD_FONT_OP_GET: |
| return con_font_get(vc, op); |
| case KD_FONT_OP_SET_DEFAULT: |
| return con_font_default(vc, op); |
| case KD_FONT_OP_COPY: |
| return con_font_copy(vc, op); |
| } |
| return -ENOSYS; |
| } |
| |
| /* |
| * Interface exported to selection and vcs. |
| */ |
| |
| /* used by selection */ |
| u16 screen_glyph(struct vc_data *vc, int offset) |
| { |
| u16 w = scr_readw(screenpos(vc, offset, 1)); |
| u16 c = w & 0xff; |
| |
| if (w & vc->vc_hi_font_mask) |
| c |= 0x100; |
| return c; |
| } |
| EXPORT_SYMBOL_GPL(screen_glyph); |
| |
| /* used by vcs - note the word offset */ |
| unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) |
| { |
| return screenpos(vc, 2 * w_offset, viewed); |
| } |
| |
| void getconsxy(struct vc_data *vc, unsigned char *p) |
| { |
| p[0] = vc->vc_x; |
| p[1] = vc->vc_y; |
| } |
| |
| void putconsxy(struct vc_data *vc, unsigned char *p) |
| { |
| hide_cursor(vc); |
| gotoxy(vc, p[0], p[1]); |
| set_cursor(vc); |
| } |
| |
| u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) |
| { |
| if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) |
| return softcursor_original; |
| return scr_readw(org); |
| } |
| |
| void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) |
| { |
| scr_writew(val, org); |
| if ((unsigned long)org == vc->vc_pos) { |
| softcursor_original = -1; |
| add_softcursor(vc); |
| } |
| } |
| |
| /* |
| * Visible symbols for modules |
| */ |
| |
| EXPORT_SYMBOL(color_table); |
| EXPORT_SYMBOL(default_red); |
| EXPORT_SYMBOL(default_grn); |
| EXPORT_SYMBOL(default_blu); |
| EXPORT_SYMBOL(update_region); |
| EXPORT_SYMBOL(redraw_screen); |
| EXPORT_SYMBOL(vc_resize); |
| EXPORT_SYMBOL(fg_console); |
| EXPORT_SYMBOL(console_blank_hook); |
| EXPORT_SYMBOL(console_blanked); |
| EXPORT_SYMBOL(vc_cons); |
| EXPORT_SYMBOL(global_cursor_default); |
| #ifndef VT_SINGLE_DRIVER |
| EXPORT_SYMBOL(take_over_console); |
| EXPORT_SYMBOL(give_up_console); |
| #endif |