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linux/drivers/video/console/fbcon.c
Jan Beulich 2f4516dbd0 [PATCH] fbcon: constify font data 
const-ify the font control structures and data, to make somewhat better
guarantees that these are not modified anywhere in the kernel.
Specifically for a kernel debugger to share this information from the
normal kernel code, such a guarantee seems rather desirable.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: "Antonino A. Daplas" <adaplas@hotpop.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-13 08:22:32 -07:00

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/*
* linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
*
* Copyright (C) 1995 Geert Uytterhoeven
*
*
* This file is based on the original Amiga console driver (amicon.c):
*
* Copyright (C) 1993 Hamish Macdonald
* Greg Harp
* Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
*
* with work by William Rucklidge (wjr@cs.cornell.edu)
* Geert Uytterhoeven
* Jes Sorensen (jds@kom.auc.dk)
* Martin Apel
*
* and on the original Atari console driver (atacon.c):
*
* Copyright (C) 1993 Bjoern Brauel
* Roman Hodek
*
* with work by Guenther Kelleter
* Martin Schaller
* Andreas Schwab
*
* Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
* Smart redraw scrolling, arbitrary font width support, 512char font support
* and software scrollback added by
* Jakub Jelinek (jj@ultra.linux.cz)
*
* Random hacking by Martin Mares <mj@ucw.cz>
*
* 2001 - Documented with DocBook
* - Brad Douglas <brad@neruo.com>
*
* The low level operations for the various display memory organizations are
* now in separate source files.
*
* Currently the following organizations are supported:
*
* o afb Amiga bitplanes
* o cfb{2,4,8,16,24,32} Packed pixels
* o ilbm Amiga interleaved bitplanes
* o iplan2p[248] Atari interleaved bitplanes
* o mfb Monochrome
* o vga VGA characters/attributes
*
* To do:
*
* - Implement 16 plane mode (iplan2p16)
*
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*/
#undef FBCONDEBUG
#include <linux/config.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/delay.h> /* MSch: for IRQ probe */
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/string.h>
#include <linux/kd.h>
#include <linux/slab.h>
#include <linux/fb.h>
#include <linux/vt_kern.h>
#include <linux/selection.h>
#include <linux/font.h>
#include <linux/smp.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/crc32.h> /* For counting font checksums */
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#ifdef CONFIG_ATARI
#include <asm/atariints.h>
#endif
#ifdef CONFIG_MAC
#include <asm/macints.h>
#endif
#if defined(__mc68000__) || defined(CONFIG_APUS)
#include <asm/machdep.h>
#include <asm/setup.h>
#endif
#include "fbcon.h"
#ifdef FBCONDEBUG
# define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
#else
# define DPRINTK(fmt, args...)
#endif
enum {
FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
};
struct display fb_display[MAX_NR_CONSOLES];
static signed char con2fb_map[MAX_NR_CONSOLES];
static signed char con2fb_map_boot[MAX_NR_CONSOLES];
static int logo_height;
static int logo_lines;
/* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
enums. */
static int logo_shown = FBCON_LOGO_CANSHOW;
/* Software scrollback */
static int fbcon_softback_size = 32768;
static unsigned long softback_buf, softback_curr;
static unsigned long softback_in;
static unsigned long softback_top, softback_end;
static int softback_lines;
/* console mappings */
static int first_fb_vc;
static int last_fb_vc = MAX_NR_CONSOLES - 1;
static int fbcon_is_default = 1;
/* font data */
static char fontname[40];
/* current fb_info */
static int info_idx = -1;
static const struct consw fb_con;
#define CM_SOFTBACK (8)
#define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
static void fbcon_free_font(struct display *);
static int fbcon_set_origin(struct vc_data *);
#define CURSOR_DRAW_DELAY (1)
/* # VBL ints between cursor state changes */
#define ATARI_CURSOR_BLINK_RATE (42)
#define MAC_CURSOR_BLINK_RATE (32)
#define DEFAULT_CURSOR_BLINK_RATE (20)
static int vbl_cursor_cnt;
#define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
/*
* Interface used by the world
*/
static const char *fbcon_startup(void);
static void fbcon_init(struct vc_data *vc, int init);
static void fbcon_deinit(struct vc_data *vc);
static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
int width);
static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
int count, int ypos, int xpos);
static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
static void fbcon_cursor(struct vc_data *vc, int mode);
static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
int count);
static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
int height, int width);
static int fbcon_switch(struct vc_data *vc);
static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
static int fbcon_scrolldelta(struct vc_data *vc, int lines);
/*
* Internal routines
*/
static __inline__ int real_y(struct display *p, int ypos);
static __inline__ void ywrap_up(struct vc_data *vc, int count);
static __inline__ void ywrap_down(struct vc_data *vc, int count);
static __inline__ void ypan_up(struct vc_data *vc, int count);
static __inline__ void ypan_down(struct vc_data *vc, int count);
static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
int dy, int dx, int height, int width, u_int y_break);
static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
struct vc_data *vc);
static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
int unit);
static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
int line, int count, int dy);
#ifdef CONFIG_MAC
/*
* On the Macintoy, there may or may not be a working VBL int. We need to probe
*/
static int vbl_detected;
static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
{
vbl_detected++;
return IRQ_HANDLED;
}
#endif
static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
return (info->state != FBINFO_STATE_RUNNING ||
vc->vc_mode != KD_TEXT || ops->graphics);
}
static inline int get_color(struct vc_data *vc, struct fb_info *info,
u16 c, int is_fg)
{
int depth = fb_get_color_depth(&info->var, &info->fix);
int color = 0;
if (console_blanked) {
unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
c = vc->vc_video_erase_char & charmask;
}
if (depth != 1)
color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
: attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
switch (depth) {
case 1:
{
int col = ~(0xfff << (max(info->var.green.length,
max(info->var.red.length,
info->var.blue.length)))) & 0xff;
/* 0 or 1 */
int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
if (console_blanked)
fg = bg;
color = (is_fg) ? fg : bg;
break;
}
case 2:
/*
* Scale down 16-colors to 4 colors. Default 4-color palette
* is grayscale. However, simply dividing the values by 4
* will not work, as colors 1, 2 and 3 will be scaled-down
* to zero rendering them invisible. So empirically convert
* colors to a sane 4-level grayscale.
*/
switch (color) {
case 0:
color = 0; /* black */
break;
case 1 ... 6:
color = 2; /* white */
break;
case 7 ... 8:
color = 1; /* gray */
break;
default:
color = 3; /* intense white */
break;
}
break;
case 3:
/*
* Last 8 entries of default 16-color palette is a more intense
* version of the first 8 (i.e., same chrominance, different
* luminance).
*/
color &= 7;
break;
}
return color;
}
static void fb_flashcursor(void *private)
{
struct fb_info *info = private;
struct fbcon_ops *ops = info->fbcon_par;
struct display *p;
struct vc_data *vc = NULL;
int c;
int mode;
if (ops->currcon != -1)
vc = vc_cons[ops->currcon].d;
if (!vc || !CON_IS_VISIBLE(vc) ||
fbcon_is_inactive(vc, info) ||
registered_fb[con2fb_map[vc->vc_num]] != info ||
vc_cons[ops->currcon].d->vc_deccm != 1)
return;
acquire_console_sem();
p = &fb_display[vc->vc_num];
c = scr_readw((u16 *) vc->vc_pos);
mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
CM_ERASE : CM_DRAW;
ops->cursor(vc, info, p, mode, softback_lines, get_color(vc, info, c, 1),
get_color(vc, info, c, 0));
release_console_sem();
}
#if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
static int cursor_blink_rate;
static irqreturn_t fb_vbl_handler(int irq, void *dev_id, struct pt_regs *fp)
{
struct fb_info *info = dev_id;
if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
schedule_work(&info->queue);
vbl_cursor_cnt = cursor_blink_rate;
}
return IRQ_HANDLED;
}
#endif
static void cursor_timer_handler(unsigned long dev_addr)
{
struct fb_info *info = (struct fb_info *) dev_addr;
struct fbcon_ops *ops = info->fbcon_par;
schedule_work(&info->queue);
mod_timer(&ops->cursor_timer, jiffies + HZ/5);
}
static void fbcon_add_cursor_timer(struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
!(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
if (!info->queue.func)
INIT_WORK(&info->queue, fb_flashcursor, info);
init_timer(&ops->cursor_timer);
ops->cursor_timer.function = cursor_timer_handler;
ops->cursor_timer.expires = jiffies + HZ / 5;
ops->cursor_timer.data = (unsigned long ) info;
add_timer(&ops->cursor_timer);
ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
}
}
static void fbcon_del_cursor_timer(struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
if (info->queue.func == fb_flashcursor &&
ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
del_timer_sync(&ops->cursor_timer);
ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
}
}
#ifndef MODULE
static int __init fb_console_setup(char *this_opt)
{
char *options;
int i, j;
if (!this_opt || !*this_opt)
return 0;
while ((options = strsep(&this_opt, ",")) != NULL) {
if (!strncmp(options, "font:", 5))
strcpy(fontname, options + 5);
if (!strncmp(options, "scrollback:", 11)) {
options += 11;
if (*options) {
fbcon_softback_size = simple_strtoul(options, &options, 0);
if (*options == 'k' || *options == 'K') {
fbcon_softback_size *= 1024;
options++;
}
if (*options != ',')
return 0;
options++;
} else
return 0;
}
if (!strncmp(options, "map:", 4)) {
options += 4;
if (*options)
for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
if (!options[j])
j = 0;
con2fb_map_boot[i] =
(options[j++]-'0') % FB_MAX;
}
return 0;
}
if (!strncmp(options, "vc:", 3)) {
options += 3;
if (*options)
first_fb_vc = simple_strtoul(options, &options, 10) - 1;
if (first_fb_vc < 0)
first_fb_vc = 0;
if (*options++ == '-')
last_fb_vc = simple_strtoul(options, &options, 10) - 1;
fbcon_is_default = 0;
}
}
return 0;
}
__setup("fbcon=", fb_console_setup);
#endif
static int search_fb_in_map(int idx)
{
int i, retval = 0;
for (i = 0; i < MAX_NR_CONSOLES; i++) {
if (con2fb_map[i] == idx)
retval = 1;
}
return retval;
}
static int search_for_mapped_con(void)
{
int i, retval = 0;
for (i = 0; i < MAX_NR_CONSOLES; i++) {
if (con2fb_map[i] != -1)
retval = 1;
}
return retval;
}
static int fbcon_takeover(int show_logo)
{
int err, i;
if (!num_registered_fb)
return -ENODEV;
if (!show_logo)
logo_shown = FBCON_LOGO_DONTSHOW;
for (i = first_fb_vc; i <= last_fb_vc; i++)
con2fb_map[i] = info_idx;
err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
fbcon_is_default);
if (err) {
for (i = first_fb_vc; i <= last_fb_vc; i++) {
con2fb_map[i] = -1;
}
info_idx = -1;
}
return err;
}
static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
int cols, int rows, int new_cols, int new_rows)
{
/* Need to make room for the logo */
int cnt, erase = vc->vc_video_erase_char, step;
unsigned short *save = NULL, *r, *q;
/*
* remove underline attribute from erase character
* if black and white framebuffer.
*/
if (fb_get_color_depth(&info->var, &info->fix) == 1)
erase &= ~0x400;
logo_height = fb_prepare_logo(info);
logo_lines = (logo_height + vc->vc_font.height - 1) /
vc->vc_font.height;
q = (unsigned short *) (vc->vc_origin +
vc->vc_size_row * rows);
step = logo_lines * cols;
for (r = q - logo_lines * cols; r < q; r++)
if (scr_readw(r) != vc->vc_video_erase_char)
break;
if (r != q && new_rows >= rows + logo_lines) {
save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
if (save) {
int i = cols < new_cols ? cols : new_cols;
scr_memsetw(save, erase, logo_lines * new_cols * 2);
r = q - step;
for (cnt = 0; cnt < logo_lines; cnt++, r += i)
scr_memcpyw(save + cnt * new_cols, r, 2 * i);
r = q;
}
}
if (r == q) {
/* We can scroll screen down */
r = q - step - cols;
for (cnt = rows - logo_lines; cnt > 0; cnt--) {
scr_memcpyw(r + step, r, vc->vc_size_row);
r -= cols;
}
if (!save) {
vc->vc_y += logo_lines;
vc->vc_pos += logo_lines * vc->vc_size_row;
}
}
scr_memsetw((unsigned short *) vc->vc_origin,
erase,
vc->vc_size_row * logo_lines);
if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
fbcon_clear_margins(vc, 0);
update_screen(vc);
}
if (save) {
q = (unsigned short *) (vc->vc_origin +
vc->vc_size_row *
rows);
scr_memcpyw(q, save, logo_lines * new_cols * 2);
vc->vc_y += logo_lines;
vc->vc_pos += logo_lines * vc->vc_size_row;
kfree(save);
}
if (logo_lines > vc->vc_bottom) {
logo_shown = FBCON_LOGO_CANSHOW;
printk(KERN_INFO
"fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
} else if (logo_shown != FBCON_LOGO_DONTSHOW) {
logo_shown = FBCON_LOGO_DRAW;
vc->vc_top = logo_lines;
}
}
#ifdef CONFIG_FB_TILEBLITTING
static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
struct display *p)
{
struct fbcon_ops *ops = info->fbcon_par;
if ((info->flags & FBINFO_MISC_TILEBLITTING))
fbcon_set_tileops(vc, info, p, ops);
else
fbcon_set_bitops(ops);
}
#else
static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
struct display *p)
{
struct fbcon_ops *ops = info->fbcon_par;
info->flags &= ~FBINFO_MISC_TILEBLITTING;
fbcon_set_bitops(ops);
}
#endif /* CONFIG_MISC_TILEBLITTING */
static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
int unit, int oldidx)
{
struct fbcon_ops *ops = NULL;
int err = 0;
if (!try_module_get(info->fbops->owner))
err = -ENODEV;
if (!err && info->fbops->fb_open &&
info->fbops->fb_open(info, 0))
err = -ENODEV;
if (!err) {
ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
if (!ops)
err = -ENOMEM;
}
if (!err) {
memset(ops, 0, sizeof(struct fbcon_ops));
info->fbcon_par = ops;
set_blitting_type(vc, info, NULL);
}
if (err) {
con2fb_map[unit] = oldidx;
module_put(info->fbops->owner);
}
return err;
}
static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
struct fb_info *newinfo, int unit,
int oldidx, int found)
{
struct fbcon_ops *ops = oldinfo->fbcon_par;
int err = 0;
if (oldinfo->fbops->fb_release &&
oldinfo->fbops->fb_release(oldinfo, 0)) {
con2fb_map[unit] = oldidx;
if (!found && newinfo->fbops->fb_release)
newinfo->fbops->fb_release(newinfo, 0);
if (!found)
module_put(newinfo->fbops->owner);
err = -ENODEV;
}
if (!err) {
fbcon_del_cursor_timer(oldinfo);
kfree(ops->cursor_state.mask);
kfree(ops->cursor_data);
kfree(oldinfo->fbcon_par);
oldinfo->fbcon_par = NULL;
module_put(oldinfo->fbops->owner);
}
return err;
}
static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
int unit, int show_logo)
{
struct fbcon_ops *ops = info->fbcon_par;
ops->currcon = fg_console;
if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
info->fbops->fb_set_par(info);
ops->flags |= FBCON_FLAGS_INIT;
ops->graphics = 0;
if (vc)
fbcon_set_disp(info, &info->var, vc);
else
fbcon_preset_disp(info, &info->var, unit);
if (show_logo) {
struct vc_data *fg_vc = vc_cons[fg_console].d;
struct fb_info *fg_info =
registered_fb[con2fb_map[fg_console]];
fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
fg_vc->vc_rows, fg_vc->vc_cols,
fg_vc->vc_rows);
}
update_screen(vc_cons[fg_console].d);
}
/**
* set_con2fb_map - map console to frame buffer device
* @unit: virtual console number to map
* @newidx: frame buffer index to map virtual console to
* @user: user request
*
* Maps a virtual console @unit to a frame buffer device
* @newidx.
*/
static int set_con2fb_map(int unit, int newidx, int user)
{
struct vc_data *vc = vc_cons[unit].d;
int oldidx = con2fb_map[unit];
struct fb_info *info = registered_fb[newidx];
struct fb_info *oldinfo = NULL;
int found, err = 0;
if (oldidx == newidx)
return 0;
if (!info)
err = -EINVAL;
if (!err && !search_for_mapped_con()) {
info_idx = newidx;
return fbcon_takeover(0);
}
if (oldidx != -1)
oldinfo = registered_fb[oldidx];
found = search_fb_in_map(newidx);
acquire_console_sem();
con2fb_map[unit] = newidx;
if (!err && !found)
err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
/*
* If old fb is not mapped to any of the consoles,
* fbcon should release it.
*/
if (!err && oldinfo && !search_fb_in_map(oldidx))
err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
found);
if (!err) {
int show_logo = (fg_console == 0 && !user &&
logo_shown != FBCON_LOGO_DONTSHOW);
if (!found)
fbcon_add_cursor_timer(info);
con2fb_map_boot[unit] = newidx;
con2fb_init_display(vc, info, unit, show_logo);
}
release_console_sem();
return err;
}
/*
* Low Level Operations
*/
/* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
static int var_to_display(struct display *disp,
struct fb_var_screeninfo *var,
struct fb_info *info)
{
disp->xres_virtual = var->xres_virtual;
disp->yres_virtual = var->yres_virtual;
disp->bits_per_pixel = var->bits_per_pixel;
disp->grayscale = var->grayscale;
disp->nonstd = var->nonstd;
disp->accel_flags = var->accel_flags;
disp->height = var->height;
disp->width = var->width;
disp->red = var->red;
disp->green = var->green;
disp->blue = var->blue;
disp->transp = var->transp;
disp->rotate = var->rotate;
disp->mode = fb_match_mode(var, &info->modelist);
if (disp->mode == NULL)
/* This should not happen */
return -EINVAL;
return 0;
}
static void display_to_var(struct fb_var_screeninfo *var,
struct display *disp)
{
fb_videomode_to_var(var, disp->mode);
var->xres_virtual = disp->xres_virtual;
var->yres_virtual = disp->yres_virtual;
var->bits_per_pixel = disp->bits_per_pixel;
var->grayscale = disp->grayscale;
var->nonstd = disp->nonstd;
var->accel_flags = disp->accel_flags;
var->height = disp->height;
var->width = disp->width;
var->red = disp->red;
var->green = disp->green;
var->blue = disp->blue;
var->transp = disp->transp;
var->rotate = disp->rotate;
}
static const char *fbcon_startup(void)
{
const char *display_desc = "frame buffer device";
struct display *p = &fb_display[fg_console];
struct vc_data *vc = vc_cons[fg_console].d;
const struct font_desc *font = NULL;
struct module *owner;
struct fb_info *info = NULL;
struct fbcon_ops *ops;
int rows, cols;
int irqres;
irqres = 1;
/*
* If num_registered_fb is zero, this is a call for the dummy part.
* The frame buffer devices weren't initialized yet.
*/
if (!num_registered_fb || info_idx == -1)
return display_desc;
/*
* Instead of blindly using registered_fb[0], we use info_idx, set by
* fb_console_init();
*/
info = registered_fb[info_idx];
if (!info)
return NULL;
owner = info->fbops->owner;
if (!try_module_get(owner))
return NULL;
if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
module_put(owner);
return NULL;
}
ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
if (!ops) {
module_put(owner);
return NULL;
}
memset(ops, 0, sizeof(struct fbcon_ops));
ops->currcon = -1;
ops->graphics = 1;
info->fbcon_par = ops;
set_blitting_type(vc, info, NULL);
if (info->fix.type != FB_TYPE_TEXT) {
if (fbcon_softback_size) {
if (!softback_buf) {
softback_buf =
(unsigned long)
kmalloc(fbcon_softback_size,
GFP_KERNEL);
if (!softback_buf) {
fbcon_softback_size = 0;
softback_top = 0;
}
}
} else {
if (softback_buf) {
kfree((void *) softback_buf);
softback_buf = 0;
softback_top = 0;
}
}
if (softback_buf)
softback_in = softback_top = softback_curr =
softback_buf;
softback_lines = 0;
}
/* Setup default font */
if (!p->fontdata) {
if (!fontname[0] || !(font = find_font(fontname)))
font = get_default_font(info->var.xres,
info->var.yres);
vc->vc_font.width = font->width;
vc->vc_font.height = font->height;
vc->vc_font.data = (void *)(p->fontdata = font->data);
vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
}
cols = info->var.xres / vc->vc_font.width;
rows = info->var.yres / vc->vc_font.height;
vc_resize(vc, cols, rows);
DPRINTK("mode: %s\n", info->fix.id);
DPRINTK("visual: %d\n", info->fix.visual);
DPRINTK("res: %dx%d-%d\n", info->var.xres,
info->var.yres,
info->var.bits_per_pixel);
#ifdef CONFIG_ATARI
if (MACH_IS_ATARI) {
cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
irqres =
request_irq(IRQ_AUTO_4, fb_vbl_handler,
IRQ_TYPE_PRIO, "framebuffer vbl",
info);
}
#endif /* CONFIG_ATARI */
#ifdef CONFIG_MAC
/*
* On a Macintoy, the VBL interrupt may or may not be active.
* As interrupt based cursor is more reliable and race free, we
* probe for VBL interrupts.
*/
if (MACH_IS_MAC) {
int ct = 0;
/*
* Probe for VBL: set temp. handler ...
*/
irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
"framebuffer vbl", info);
vbl_detected = 0;
/*
* ... and spin for 20 ms ...
*/
while (!vbl_detected && ++ct < 1000)
udelay(20);
if (ct == 1000)
printk
("fbcon_startup: No VBL detected, using timer based cursor.\n");
free_irq(IRQ_MAC_VBL, fb_vbl_detect);
if (vbl_detected) {
/*
* interrupt based cursor ok
*/
cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
irqres =
request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
"framebuffer vbl", info);
} else {
/*
* VBL not detected: fall through, use timer based cursor
*/
irqres = 1;
}
}
#endif /* CONFIG_MAC */
fbcon_add_cursor_timer(info);
return display_desc;
}
static void fbcon_init(struct vc_data *vc, int init)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops;
struct vc_data **default_mode = vc->vc_display_fg;
struct vc_data *svc = *default_mode;
struct display *t, *p = &fb_display[vc->vc_num];
int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
int cap;
if (info_idx == -1 || info == NULL)
return;
cap = info->flags;
if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
(info->fix.type == FB_TYPE_TEXT))
logo = 0;
info->var.xoffset = info->var.yoffset = p->yscroll = 0; /* reset wrap/pan */
if (var_to_display(p, &info->var, info))
return;
/* If we are not the first console on this
fb, copy the font from that console */
t = &fb_display[svc->vc_num];
if (!vc->vc_font.data) {
vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
vc->vc_font.width = (*default_mode)->vc_font.width;
vc->vc_font.height = (*default_mode)->vc_font.height;
p->userfont = t->userfont;
if (p->userfont)
REFCOUNT(p->fontdata)++;
}
if (p->userfont)
charcnt = FNTCHARCNT(p->fontdata);
vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
if (charcnt == 256) {
vc->vc_hi_font_mask = 0;
} else {
vc->vc_hi_font_mask = 0x100;
if (vc->vc_can_do_color)
vc->vc_complement_mask <<= 1;
}
if (!*svc->vc_uni_pagedir_loc)
con_set_default_unimap(svc);
if (!*vc->vc_uni_pagedir_loc)
con_copy_unimap(vc, svc);
cols = vc->vc_cols;
rows = vc->vc_rows;
new_cols = info->var.xres / vc->vc_font.width;
new_rows = info->var.yres / vc->vc_font.height;
vc_resize(vc, new_cols, new_rows);
ops = info->fbcon_par;
/*
* We must always set the mode. The mode of the previous console
* driver could be in the same resolution but we are using different
* hardware so we have to initialize the hardware.
*
* We need to do it in fbcon_init() to prevent screen corruption.
*/
if (CON_IS_VISIBLE(vc)) {
if (info->fbops->fb_set_par &&
!(ops->flags & FBCON_FLAGS_INIT))
info->fbops->fb_set_par(info);
ops->flags |= FBCON_FLAGS_INIT;
}
ops->graphics = 0;
if ((cap & FBINFO_HWACCEL_COPYAREA) &&
!(cap & FBINFO_HWACCEL_DISABLED))
p->scrollmode = SCROLL_MOVE;
else /* default to something safe */
p->scrollmode = SCROLL_REDRAW;
/*
* ++guenther: console.c:vc_allocate() relies on initializing
* vc_{cols,rows}, but we must not set those if we are only
* resizing the console.
*/
if (!init) {
vc->vc_cols = new_cols;
vc->vc_rows = new_rows;
}
if (logo)
fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
if (vc == svc && softback_buf) {
int l = fbcon_softback_size / vc->vc_size_row;
if (l > 5)
softback_end = softback_buf + l * vc->vc_size_row;
else {
/* Smaller scrollback makes no sense, and 0 would screw
the operation totally */
softback_top = 0;
}
}
}
static void fbcon_deinit(struct vc_data *vc)
{
struct display *p = &fb_display[vc->vc_num];
if (info_idx != -1)
return;
fbcon_free_font(p);
}
/* ====================================================================== */
/* fbcon_XXX routines - interface used by the world
*
* This system is now divided into two levels because of complications
* caused by hardware scrolling. Top level functions:
*
* fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
*
* handles y values in range [0, scr_height-1] that correspond to real
* screen positions. y_wrap shift means that first line of bitmap may be
* anywhere on this display. These functions convert lineoffsets to
* bitmap offsets and deal with the wrap-around case by splitting blits.
*
* fbcon_bmove_physical_8() -- These functions fast implementations
* fbcon_clear_physical_8() -- of original fbcon_XXX fns.
* fbcon_putc_physical_8() -- (font width != 8) may be added later
*
* WARNING:
*
* At the moment fbcon_putc() cannot blit across vertical wrap boundary
* Implies should only really hardware scroll in rows. Only reason for
* restriction is simplicity & efficiency at the moment.
*/
static __inline__ int real_y(struct display *p, int ypos)
{
int rows = p->vrows;
ypos += p->yscroll;
return ypos < rows ? ypos : ypos - rows;
}
static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
int width)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
struct display *p = &fb_display[vc->vc_num];
u_int y_break;
if (fbcon_is_inactive(vc, info))
return;
if (!height || !width)
return;
/* Split blits that cross physical y_wrap boundary */
y_break = p->vrows - p->yscroll;
if (sy < y_break && sy + height - 1 >= y_break) {
u_int b = y_break - sy;
ops->clear(vc, info, real_y(p, sy), sx, b, width);
ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
width);
} else
ops->clear(vc, info, real_y(p, sy), sx, height, width);
}
static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
int count, int ypos, int xpos)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
struct fbcon_ops *ops = info->fbcon_par;
if (!fbcon_is_inactive(vc, info))
ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
get_color(vc, info, scr_readw(s), 1),
get_color(vc, info, scr_readw(s), 0));
}
static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
{
unsigned short chr;
scr_writew(c, &chr);
fbcon_putcs(vc, &chr, 1, ypos, xpos);
}
static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
if (!fbcon_is_inactive(vc, info))
ops->clear_margins(vc, info, bottom_only);
}
static void fbcon_cursor(struct vc_data *vc, int mode)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
struct display *p = &fb_display[vc->vc_num];
int y;
int c = scr_readw((u16 *) vc->vc_pos);
if (fbcon_is_inactive(vc, info))
return;
ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
if (mode & CM_SOFTBACK) {
mode &= ~CM_SOFTBACK;
y = softback_lines;
} else {
if (softback_lines)
fbcon_set_origin(vc);
y = 0;
}
ops->cursor(vc, info, p, mode, y, get_color(vc, info, c, 1),
get_color(vc, info, c, 0));
vbl_cursor_cnt = CURSOR_DRAW_DELAY;
}
static int scrollback_phys_max = 0;
static int scrollback_max = 0;
static int scrollback_current = 0;
static int update_var(int con, struct fb_info *info)
{
if (con == ((struct fbcon_ops *)info->fbcon_par)->currcon)
return fb_pan_display(info, &info->var);
return 0;
}
/*
* If no vc is existent yet, just set struct display
*/
static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
int unit)
{
struct display *p = &fb_display[unit];
struct display *t = &fb_display[fg_console];
var->xoffset = var->yoffset = p->yscroll = 0;
if (var_to_display(p, var, info))
return;
p->fontdata = t->fontdata;
p->userfont = t->userfont;
if (p->userfont)
REFCOUNT(p->fontdata)++;
}
static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
struct vc_data *vc)
{
struct display *p = &fb_display[vc->vc_num], *t;
struct vc_data **default_mode = vc->vc_display_fg;
struct vc_data *svc = *default_mode;
int rows, cols, charcnt = 256;
var->xoffset = var->yoffset = p->yscroll = 0;
if (var_to_display(p, var, info))
return;
t = &fb_display[svc->vc_num];
if (!vc->vc_font.data) {
vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
vc->vc_font.width = (*default_mode)->vc_font.width;
vc->vc_font.height = (*default_mode)->vc_font.height;
p->userfont = t->userfont;
if (p->userfont)
REFCOUNT(p->fontdata)++;
}
if (p->userfont)
charcnt = FNTCHARCNT(p->fontdata);
var->activate = FB_ACTIVATE_NOW;
info->var.activate = var->activate;
info->var.yoffset = info->var.xoffset = 0;
fb_set_var(info, var);
vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
if (charcnt == 256) {
vc->vc_hi_font_mask = 0;
} else {
vc->vc_hi_font_mask = 0x100;
if (vc->vc_can_do_color)
vc->vc_complement_mask <<= 1;
}
if (!*svc->vc_uni_pagedir_loc)
con_set_default_unimap(svc);
if (!*vc->vc_uni_pagedir_loc)
con_copy_unimap(vc, svc);
cols = var->xres / vc->vc_font.width;
rows = var->yres / vc->vc_font.height;
vc_resize(vc, cols, rows);
if (CON_IS_VISIBLE(vc)) {
update_screen(vc);
if (softback_buf) {
int l = fbcon_softback_size / vc->vc_size_row;
if (l > 5)
softback_end = softback_buf + l *
vc->vc_size_row;
else {
/* Smaller scrollback makes no sense, and 0
would screw the operation totally */
softback_top = 0;
}
}
}
}
static __inline__ void ywrap_up(struct vc_data *vc, int count)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
p->yscroll += count;
if (p->yscroll >= p->vrows) /* Deal with wrap */
p->yscroll -= p->vrows;
info->var.xoffset = 0;
info->var.yoffset = p->yscroll * vc->vc_font.height;
info->var.vmode |= FB_VMODE_YWRAP;
update_var(vc->vc_num, info);
scrollback_max += count;
if (scrollback_max > scrollback_phys_max)
scrollback_max = scrollback_phys_max;
scrollback_current = 0;
}
static __inline__ void ywrap_down(struct vc_data *vc, int count)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
p->yscroll -= count;
if (p->yscroll < 0) /* Deal with wrap */
p->yscroll += p->vrows;
info->var.xoffset = 0;
info->var.yoffset = p->yscroll * vc->vc_font.height;
info->var.vmode |= FB_VMODE_YWRAP;
update_var(vc->vc_num, info);
scrollback_max -= count;
if (scrollback_max < 0)
scrollback_max = 0;
scrollback_current = 0;
}
static __inline__ void ypan_up(struct vc_data *vc, int count)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
struct fbcon_ops *ops = info->fbcon_par;
p->yscroll += count;
if (p->yscroll > p->vrows - vc->vc_rows) {
ops->bmove(vc, info, p->vrows - vc->vc_rows,
0, 0, 0, vc->vc_rows, vc->vc_cols);
p->yscroll -= p->vrows - vc->vc_rows;
}
info->var.xoffset = 0;
info->var.yoffset = p->yscroll * vc->vc_font.height;
info->var.vmode &= ~FB_VMODE_YWRAP;
update_var(vc->vc_num, info);
fbcon_clear_margins(vc, 1);
scrollback_max += count;
if (scrollback_max > scrollback_phys_max)
scrollback_max = scrollback_phys_max;
scrollback_current = 0;
}
static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
int redraw = 0;
p->yscroll += count;
if (p->yscroll > p->vrows - vc->vc_rows) {
p->yscroll -= p->vrows - vc->vc_rows;
redraw = 1;
}
info->var.xoffset = 0;
info->var.yoffset = p->yscroll * vc->vc_font.height;
info->var.vmode &= ~FB_VMODE_YWRAP;
if (redraw)
fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
update_var(vc->vc_num, info);
fbcon_clear_margins(vc, 1);
scrollback_max += count;
if (scrollback_max > scrollback_phys_max)
scrollback_max = scrollback_phys_max;
scrollback_current = 0;
}
static __inline__ void ypan_down(struct vc_data *vc, int count)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
struct fbcon_ops *ops = info->fbcon_par;
p->yscroll -= count;
if (p->yscroll < 0) {
ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
0, vc->vc_rows, vc->vc_cols);
p->yscroll += p->vrows - vc->vc_rows;
}
info->var.xoffset = 0;
info->var.yoffset = p->yscroll * vc->vc_font.height;
info->var.vmode &= ~FB_VMODE_YWRAP;
update_var(vc->vc_num, info);
fbcon_clear_margins(vc, 1);
scrollback_max -= count;
if (scrollback_max < 0)
scrollback_max = 0;
scrollback_current = 0;
}
static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
int redraw = 0;
p->yscroll -= count;
if (p->yscroll < 0) {
p->yscroll += p->vrows - vc->vc_rows;
redraw = 1;
}
info->var.xoffset = 0;
info->var.yoffset = p->yscroll * vc->vc_font.height;
info->var.vmode &= ~FB_VMODE_YWRAP;
if (redraw)
fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
update_var(vc->vc_num, info);
fbcon_clear_margins(vc, 1);
scrollback_max -= count;
if (scrollback_max < 0)
scrollback_max = 0;
scrollback_current = 0;
}
static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
long delta)
{
int count = vc->vc_rows;
unsigned short *d, *s;
unsigned long n;
int line = 0;
d = (u16 *) softback_curr;
if (d == (u16 *) softback_in)
d = (u16 *) vc->vc_origin;
n = softback_curr + delta * vc->vc_size_row;
softback_lines -= delta;
if (delta < 0) {
if (softback_curr < softback_top && n < softback_buf) {
n += softback_end - softback_buf;
if (n < softback_top) {
softback_lines -=
(softback_top - n) / vc->vc_size_row;
n = softback_top;
}
} else if (softback_curr >= softback_top
&& n < softback_top) {
softback_lines -=
(softback_top - n) / vc->vc_size_row;
n = softback_top;
}
} else {
if (softback_curr > softback_in && n >= softback_end) {
n += softback_buf - softback_end;
if (n > softback_in) {
n = softback_in;
softback_lines = 0;
}
} else if (softback_curr <= softback_in && n > softback_in) {
n = softback_in;
softback_lines = 0;
}
}
if (n == softback_curr)
return;
softback_curr = n;
s = (u16 *) softback_curr;
if (s == (u16 *) softback_in)
s = (u16 *) vc->vc_origin;
while (count--) {
unsigned short *start;
unsigned short *le;
unsigned short c;
int x = 0;
unsigned short attr = 1;
start = s;
le = advance_row(s, 1);
do {
c = scr_readw(s);
if (attr != (c & 0xff00)) {
attr = c & 0xff00;
if (s > start) {
fbcon_putcs(vc, start, s - start,
line, x);
x += s - start;
start = s;
}
}
if (c == scr_readw(d)) {
if (s > start) {
fbcon_putcs(vc, start, s - start,
line, x);
x += s - start + 1;
start = s + 1;
} else {
x++;
start++;
}
}
s++;
d++;
} while (s < le);
if (s > start)
fbcon_putcs(vc, start, s - start, line, x);
line++;
if (d == (u16 *) softback_end)
d = (u16 *) softback_buf;
if (d == (u16 *) softback_in)
d = (u16 *) vc->vc_origin;
if (s == (u16 *) softback_end)
s = (u16 *) softback_buf;
if (s == (u16 *) softback_in)
s = (u16 *) vc->vc_origin;
}
}
static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
int line, int count, int dy)
{
unsigned short *s = (unsigned short *)
(vc->vc_origin + vc->vc_size_row * line);
while (count--) {
unsigned short *start = s;
unsigned short *le = advance_row(s, 1);
unsigned short c;
int x = 0;
unsigned short attr = 1;
do {
c = scr_readw(s);
if (attr != (c & 0xff00)) {
attr = c & 0xff00;
if (s > start) {
fbcon_putcs(vc, start, s - start,
dy, x);
x += s - start;
start = s;
}
}
console_conditional_schedule();
s++;
} while (s < le);
if (s > start)
fbcon_putcs(vc, start, s - start, dy, x);
console_conditional_schedule();
dy++;
}
}
static void fbcon_redraw(struct vc_data *vc, struct display *p,
int line, int count, int offset)
{
unsigned short *d = (unsigned short *)
(vc->vc_origin + vc->vc_size_row * line);
unsigned short *s = d + offset;
while (count--) {
unsigned short *start = s;
unsigned short *le = advance_row(s, 1);
unsigned short c;
int x = 0;
unsigned short attr = 1;
do {
c = scr_readw(s);
if (attr != (c & 0xff00)) {
attr = c & 0xff00;
if (s > start) {
fbcon_putcs(vc, start, s - start,
line, x);
x += s - start;
start = s;
}
}
if (c == scr_readw(d)) {
if (s > start) {
fbcon_putcs(vc, start, s - start,
line, x);
x += s - start + 1;
start = s + 1;
} else {
x++;
start++;
}
}
scr_writew(c, d);
console_conditional_schedule();
s++;
d++;
} while (s < le);
if (s > start)
fbcon_putcs(vc, start, s - start, line, x);
console_conditional_schedule();
if (offset > 0)
line++;
else {
line--;
/* NOTE: We subtract two lines from these pointers */
s -= vc->vc_size_row;
d -= vc->vc_size_row;
}
}
}
static inline void fbcon_softback_note(struct vc_data *vc, int t,
int count)
{
unsigned short *p;
if (vc->vc_num != fg_console)
return;
p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
while (count) {
scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
count--;
p = advance_row(p, 1);
softback_in += vc->vc_size_row;
if (softback_in == softback_end)
softback_in = softback_buf;
if (softback_in == softback_top) {
softback_top += vc->vc_size_row;
if (softback_top == softback_end)
softback_top = softback_buf;
}
}
softback_curr = softback_in;
}
static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
int count)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
struct fbcon_ops *ops = info->fbcon_par;
int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
if (fbcon_is_inactive(vc, info))
return -EINVAL;
fbcon_cursor(vc, CM_ERASE);
/*
* ++Geert: Only use ywrap/ypan if the console is in text mode
* ++Andrew: Only use ypan on hardware text mode when scrolling the
* whole screen (prevents flicker).
*/
switch (dir) {
case SM_UP:
if (count > vc->vc_rows) /* Maximum realistic size */
count = vc->vc_rows;
if (softback_top)
fbcon_softback_note(vc, t, count);
if (logo_shown >= 0)
goto redraw_up;
switch (p->scrollmode) {
case SCROLL_MOVE:
ops->bmove(vc, info, t + count, 0, t, 0,
b - t - count, vc->vc_cols);
ops->clear(vc, info, b - count, 0, count,
vc->vc_cols);
break;
case SCROLL_WRAP_MOVE:
if (b - t - count > 3 * vc->vc_rows >> 2) {
if (t > 0)
fbcon_bmove(vc, 0, 0, count, 0, t,
vc->vc_cols);
ywrap_up(vc, count);
if (vc->vc_rows - b > 0)
fbcon_bmove(vc, b - count, 0, b, 0,
vc->vc_rows - b,
vc->vc_cols);
} else if (info->flags & FBINFO_READS_FAST)
fbcon_bmove(vc, t + count, 0, t, 0,
b - t - count, vc->vc_cols);
else
goto redraw_up;
fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
break;
case SCROLL_PAN_REDRAW:
if ((p->yscroll + count <=
2 * (p->vrows - vc->vc_rows))
&& ((!scroll_partial && (b - t == vc->vc_rows))
|| (scroll_partial
&& (b - t - count >
3 * vc->vc_rows >> 2)))) {
if (t > 0)
fbcon_redraw_move(vc, p, 0, t, count);
ypan_up_redraw(vc, t, count);
if (vc->vc_rows - b > 0)
fbcon_redraw_move(vc, p, b - count,
vc->vc_rows - b, b);
} else
fbcon_redraw_move(vc, p, t + count, b - t - count, t);
fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
break;
case SCROLL_PAN_MOVE:
if ((p->yscroll + count <=
2 * (p->vrows - vc->vc_rows))
&& ((!scroll_partial && (b - t == vc->vc_rows))
|| (scroll_partial
&& (b - t - count >
3 * vc->vc_rows >> 2)))) {
if (t > 0)
fbcon_bmove(vc, 0, 0, count, 0, t,
vc->vc_cols);
ypan_up(vc, count);
if (vc->vc_rows - b > 0)
fbcon_bmove(vc, b - count, 0, b, 0,
vc->vc_rows - b,
vc->vc_cols);
} else if (info->flags & FBINFO_READS_FAST)
fbcon_bmove(vc, t + count, 0, t, 0,
b - t - count, vc->vc_cols);
else
goto redraw_up;
fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
break;
case SCROLL_REDRAW:
redraw_up:
fbcon_redraw(vc, p, t, b - t - count,
count * vc->vc_cols);
fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
scr_memsetw((unsigned short *) (vc->vc_origin +
vc->vc_size_row *
(b - count)),
vc->vc_video_erase_char,
vc->vc_size_row * count);
return 1;
}
break;
case SM_DOWN:
if (count > vc->vc_rows) /* Maximum realistic size */
count = vc->vc_rows;
if (logo_shown >= 0)
goto redraw_down;
switch (p->scrollmode) {
case SCROLL_MOVE:
ops->bmove(vc, info, t, 0, t + count, 0,
b - t - count, vc->vc_cols);
ops->clear(vc, info, t, 0, count, vc->vc_cols);
break;
case SCROLL_WRAP_MOVE:
if (b - t - count > 3 * vc->vc_rows >> 2) {
if (vc->vc_rows - b > 0)
fbcon_bmove(vc, b, 0, b - count, 0,
vc->vc_rows - b,
vc->vc_cols);
ywrap_down(vc, count);
if (t > 0)
fbcon_bmove(vc, count, 0, 0, 0, t,
vc->vc_cols);
} else if (info->flags & FBINFO_READS_FAST)
fbcon_bmove(vc, t, 0, t + count, 0,
b - t - count, vc->vc_cols);
else
goto redraw_down;
fbcon_clear(vc, t, 0, count, vc->vc_cols);
break;
case SCROLL_PAN_MOVE:
if ((count - p->yscroll <= p->vrows - vc->vc_rows)
&& ((!scroll_partial && (b - t == vc->vc_rows))
|| (scroll_partial
&& (b - t - count >
3 * vc->vc_rows >> 2)))) {
if (vc->vc_rows - b > 0)
fbcon_bmove(vc, b, 0, b - count, 0,
vc->vc_rows - b,
vc->vc_cols);
ypan_down(vc, count);
if (t > 0)
fbcon_bmove(vc, count, 0, 0, 0, t,
vc->vc_cols);
} else if (info->flags & FBINFO_READS_FAST)
fbcon_bmove(vc, t, 0, t + count, 0,
b - t - count, vc->vc_cols);
else
goto redraw_down;
fbcon_clear(vc, t, 0, count, vc->vc_cols);
break;
case SCROLL_PAN_REDRAW:
if ((count - p->yscroll <= p->vrows - vc->vc_rows)
&& ((!scroll_partial && (b - t == vc->vc_rows))
|| (scroll_partial
&& (b - t - count >
3 * vc->vc_rows >> 2)))) {
if (vc->vc_rows - b > 0)
fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
b - count);
ypan_down_redraw(vc, t, count);
if (t > 0)
fbcon_redraw_move(vc, p, count, t, 0);
} else
fbcon_redraw_move(vc, p, t, b - t - count, t + count);
fbcon_clear(vc, t, 0, count, vc->vc_cols);
break;
case SCROLL_REDRAW:
redraw_down:
fbcon_redraw(vc, p, b - 1, b - t - count,
-count * vc->vc_cols);
fbcon_clear(vc, t, 0, count, vc->vc_cols);
scr_memsetw((unsigned short *) (vc->vc_origin +
vc->vc_size_row *
t),
vc->vc_video_erase_char,
vc->vc_size_row * count);
return 1;
}
}
return 0;
}
static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
int height, int width)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
if (fbcon_is_inactive(vc, info))
return;
if (!width || !height)
return;
/* Split blits that cross physical y_wrap case.
* Pathological case involves 4 blits, better to use recursive
* code rather than unrolled case
*
* Recursive invocations don't need to erase the cursor over and
* over again, so we use fbcon_bmove_rec()
*/
fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
p->vrows - p->yscroll);
}
static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
int dy, int dx, int height, int width, u_int y_break)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
u_int b;
if (sy < y_break && sy + height > y_break) {
b = y_break - sy;
if (dy < sy) { /* Avoid trashing self */
fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
y_break);
fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
height - b, width, y_break);
} else {
fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
height - b, width, y_break);
fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
y_break);
}
return;
}
if (dy < y_break && dy + height > y_break) {
b = y_break - dy;
if (dy < sy) { /* Avoid trashing self */
fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
y_break);
fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
height - b, width, y_break);
} else {
fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
height - b, width, y_break);
fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
y_break);
}
return;
}
ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
height, width);
}
static __inline__ void updatescrollmode(struct display *p, struct fb_info *info,
struct vc_data *vc)
{
int fh = vc->vc_font.height;
int cap = info->flags;
int good_pan = (cap & FBINFO_HWACCEL_YPAN)
&& divides(info->fix.ypanstep, vc->vc_font.height)
&& info->var.yres_virtual > info->var.yres;
int good_wrap = (cap & FBINFO_HWACCEL_YWRAP)
&& divides(info->fix.ywrapstep, vc->vc_font.height)
&& divides(vc->vc_font.height, info->var.yres_virtual);
int reading_fast = cap & FBINFO_READS_FAST;
int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && !(cap & FBINFO_HWACCEL_DISABLED);
int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && !(cap & FBINFO_HWACCEL_DISABLED);
p->vrows = info->var.yres_virtual/fh;
if (info->var.yres > (fh * (vc->vc_rows + 1)))
p->vrows -= (info->var.yres - (fh * vc->vc_rows)) / fh;
if ((info->var.yres % fh) && (info->var.yres_virtual % fh <
info->var.yres % fh))
p->vrows--;
if (good_wrap || good_pan) {
if (reading_fast || fast_copyarea)
p->scrollmode = good_wrap ? SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
else
p->scrollmode = good_wrap ? SCROLL_REDRAW :
SCROLL_PAN_REDRAW;
} else {
if (reading_fast || (fast_copyarea && !fast_imageblit))
p->scrollmode = SCROLL_MOVE;
else
p->scrollmode = SCROLL_REDRAW;
}
}
static int fbcon_resize(struct vc_data *vc, unsigned int width,
unsigned int height)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
struct fb_var_screeninfo var = info->var;
int x_diff, y_diff;
int fw = vc->vc_font.width;
int fh = vc->vc_font.height;
var.xres = width * fw;
var.yres = height * fh;
x_diff = info->var.xres - var.xres;
y_diff = info->var.yres - var.yres;
if (x_diff < 0 || x_diff > fw || (y_diff < 0 || y_diff > fh)) {
struct fb_videomode *mode;
DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
mode = fb_find_best_mode(&var, &info->modelist);
if (mode == NULL)
return -EINVAL;
fb_videomode_to_var(&var, mode);
if (width > var.xres/fw || height > var.yres/fh)
return -EINVAL;
/*
* The following can probably have any value... Do we need to
* set all of them?
*/
var.bits_per_pixel = p->bits_per_pixel;
var.xres_virtual = p->xres_virtual;
var.yres_virtual = p->yres_virtual;
var.accel_flags = p->accel_flags;
var.width = p->width;
var.height = p->height;
var.red = p->red;
var.green = p->green;
var.blue = p->blue;
var.transp = p->transp;
var.nonstd = p->nonstd;
DPRINTK("resize now %ix%i\n", var.xres, var.yres);
if (CON_IS_VISIBLE(vc)) {
var.activate = FB_ACTIVATE_NOW |
FB_ACTIVATE_FORCE;
fb_set_var(info, &var);
}
var_to_display(p, &info->var, info);
}
updatescrollmode(p, info, vc);
return 0;
}
static int fbcon_switch(struct vc_data *vc)
{
struct fb_info *info, *old_info = NULL;
struct display *p = &fb_display[vc->vc_num];
struct fb_var_screeninfo var;
int i, prev_console;
info = registered_fb[con2fb_map[vc->vc_num]];
if (softback_top) {
int l = fbcon_softback_size / vc->vc_size_row;
if (softback_lines)
fbcon_set_origin(vc);
softback_top = softback_curr = softback_in = softback_buf;
softback_lines = 0;
if (l > 5)
softback_end = softback_buf + l * vc->vc_size_row;
else {
/* Smaller scrollback makes no sense, and 0 would screw
the operation totally */
softback_top = 0;
}
}
if (logo_shown >= 0) {
struct vc_data *conp2 = vc_cons[logo_shown].d;
if (conp2->vc_top == logo_lines
&& conp2->vc_bottom == conp2->vc_rows)
conp2->vc_top = 0;
logo_shown = FBCON_LOGO_CANSHOW;
}
prev_console = ((struct fbcon_ops *)info->fbcon_par)->currcon;
if (prev_console != -1)
old_info = registered_fb[con2fb_map[prev_console]];
/*
* FIXME: If we have multiple fbdev's loaded, we need to
* update all info->currcon. Perhaps, we can place this
* in a centralized structure, but this might break some
* drivers.
*
* info->currcon = vc->vc_num;
*/
for (i = 0; i < FB_MAX; i++) {
if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
struct fbcon_ops *ops = registered_fb[i]->fbcon_par;
ops->currcon = vc->vc_num;
}
}
memset(&var, 0, sizeof(struct fb_var_screeninfo));
display_to_var(&var, p);
var.activate = FB_ACTIVATE_NOW;
/*
* make sure we don't unnecessarily trip the memcmp()
* in fb_set_var()
*/
info->var.activate = var.activate;
info->var.yoffset = info->var.xoffset = p->yscroll = 0;
fb_set_var(info, &var);
if (old_info != NULL && old_info != info) {
if (info->fbops->fb_set_par)
info->fbops->fb_set_par(info);
fbcon_del_cursor_timer(old_info);
fbcon_add_cursor_timer(info);
}
set_blitting_type(vc, info, p);
((struct fbcon_ops *)info->fbcon_par)->cursor_reset = 1;
vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
updatescrollmode(p, info, vc);
switch (p->scrollmode) {
case SCROLL_WRAP_MOVE:
scrollback_phys_max = p->vrows - vc->vc_rows;
break;
case SCROLL_PAN_MOVE:
case SCROLL_PAN_REDRAW:
scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
if (scrollback_phys_max < 0)
scrollback_phys_max = 0;
break;
default:
scrollback_phys_max = 0;
break;
}
scrollback_max = 0;
scrollback_current = 0;
update_var(vc->vc_num, info);
fbcon_set_palette(vc, color_table);
fbcon_clear_margins(vc, 0);
if (logo_shown == FBCON_LOGO_DRAW) {
logo_shown = fg_console;
/* This is protected above by initmem_freed */
fb_show_logo(info);
update_region(vc,
vc->vc_origin + vc->vc_size_row * vc->vc_top,
vc->vc_size_row * (vc->vc_bottom -
vc->vc_top) / 2);
return 0;
}
return 1;
}
static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
int blank)
{
if (blank) {
unsigned short charmask = vc->vc_hi_font_mask ?
0x1ff : 0xff;
unsigned short oldc;
oldc = vc->vc_video_erase_char;
vc->vc_video_erase_char &= charmask;
fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
vc->vc_video_erase_char = oldc;
}
}
static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct fbcon_ops *ops = info->fbcon_par;
if (mode_switch) {
struct fb_var_screeninfo var = info->var;
ops->graphics = 1;
if (!blank) {
var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
fb_set_var(info, &var);
ops->graphics = 0;
}
}
if (!fbcon_is_inactive(vc, info)) {
if (ops->blank_state != blank) {
ops->blank_state = blank;
fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
ops->cursor_flash = (!blank);
if (fb_blank(info, blank))
fbcon_generic_blank(vc, info, blank);
}
if (!blank)
update_screen(vc);
}
if (!blank)
fbcon_add_cursor_timer(info);
else
fbcon_del_cursor_timer(info);
return 0;
}
static void fbcon_free_font(struct display *p)
{
if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
p->fontdata = NULL;
p->userfont = 0;
}
static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
{
u8 *fontdata = vc->vc_font.data;
u8 *data = font->data;
int i, j;
font->width = vc->vc_font.width;
font->height = vc->vc_font.height;
font->charcount = vc->vc_hi_font_mask ? 512 : 256;
if (!font->data)
return 0;
if (font->width <= 8) {
j = vc->vc_font.height;
for (i = 0; i < font->charcount; i++) {
memcpy(data, fontdata, j);
memset(data + j, 0, 32 - j);
data += 32;
fontdata += j;
}
} else if (font->width <= 16) {
j = vc->vc_font.height * 2;
for (i = 0; i < font->charcount; i++) {
memcpy(data, fontdata, j);
memset(data + j, 0, 64 - j);
data += 64;
fontdata += j;
}
} else if (font->width <= 24) {
for (i = 0; i < font->charcount; i++) {
for (j = 0; j < vc->vc_font.height; j++) {
*data++ = fontdata[0];
*data++ = fontdata[1];
*data++ = fontdata[2];
fontdata += sizeof(u32);
}
memset(data, 0, 3 * (32 - j));
data += 3 * (32 - j);
}
} else {
j = vc->vc_font.height * 4;
for (i = 0; i < font->charcount; i++) {
memcpy(data, fontdata, j);
memset(data + j, 0, 128 - j);
data += 128;
fontdata += j;
}
}
return 0;
}
static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
const u8 * data, int userfont)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
int resize;
int cnt;
char *old_data = NULL;
if (CON_IS_VISIBLE(vc) && softback_lines)
fbcon_set_origin(vc);
resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
if (p->userfont)
old_data = vc->vc_font.data;
if (userfont)
cnt = FNTCHARCNT(data);
else
cnt = 256;
vc->vc_font.data = (void *)(p->fontdata = data);
if ((p->userfont = userfont))
REFCOUNT(data)++;
vc->vc_font.width = w;
vc->vc_font.height = h;
if (vc->vc_hi_font_mask && cnt == 256) {
vc->vc_hi_font_mask = 0;
if (vc->vc_can_do_color) {
vc->vc_complement_mask >>= 1;
vc->vc_s_complement_mask >>= 1;
}
/* ++Edmund: reorder the attribute bits */
if (vc->vc_can_do_color) {
unsigned short *cp =
(unsigned short *) vc->vc_origin;
int count = vc->vc_screenbuf_size / 2;
unsigned short c;
for (; count > 0; count--, cp++) {
c = scr_readw(cp);
scr_writew(((c & 0xfe00) >> 1) |
(c & 0xff), cp);
}
c = vc->vc_video_erase_char;
vc->vc_video_erase_char =
((c & 0xfe00) >> 1) | (c & 0xff);
vc->vc_attr >>= 1;
}
} else if (!vc->vc_hi_font_mask && cnt == 512) {
vc->vc_hi_font_mask = 0x100;
if (vc->vc_can_do_color) {
vc->vc_complement_mask <<= 1;
vc->vc_s_complement_mask <<= 1;
}
/* ++Edmund: reorder the attribute bits */
{
unsigned short *cp =
(unsigned short *) vc->vc_origin;
int count = vc->vc_screenbuf_size / 2;
unsigned short c;
for (; count > 0; count--, cp++) {
unsigned short newc;
c = scr_readw(cp);
if (vc->vc_can_do_color)
newc =
((c & 0xff00) << 1) | (c &
0xff);
else
newc = c & ~0x100;
scr_writew(newc, cp);
}
c = vc->vc_video_erase_char;
if (vc->vc_can_do_color) {
vc->vc_video_erase_char =
((c & 0xff00) << 1) | (c & 0xff);
vc->vc_attr <<= 1;
} else
vc->vc_video_erase_char = c & ~0x100;
}
}
if (resize) {
/* reset wrap/pan */
info->var.xoffset = info->var.yoffset = p->yscroll = 0;
vc_resize(vc, info->var.xres / w, info->var.yres / h);
if (CON_IS_VISIBLE(vc) && softback_buf) {
int l = fbcon_softback_size / vc->vc_size_row;
if (l > 5)
softback_end =
softback_buf + l * vc->vc_size_row;
else {
/* Smaller scrollback makes no sense, and 0 would screw
the operation totally */
softback_top = 0;
}
}
} else if (CON_IS_VISIBLE(vc)
&& vc->vc_mode == KD_TEXT) {
fbcon_clear_margins(vc, 0);
update_screen(vc);
}
if (old_data && (--REFCOUNT(old_data) == 0))
kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
return 0;
}
static int fbcon_copy_font(struct vc_data *vc, int con)
{
struct display *od = &fb_display[con];
struct console_font *f = &vc->vc_font;
if (od->fontdata == f->data)
return 0; /* already the same font... */
return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
}
/*
* User asked to set font; we are guaranteed that
* a) width and height are in range 1..32
* b) charcount does not exceed 512
* but lets not assume that, since someone might someday want to use larger
* fonts. And charcount of 512 is small for unicode support.
*
* However, user space gives the font in 32 rows , regardless of
* actual font height. So a new API is needed if support for larger fonts
* is ever implemented.
*/
static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
{
unsigned charcount = font->charcount;
int w = font->width;
int h = font->height;
int size;
int i, csum;
u8 *new_data, *data = font->data;
int pitch = (font->width+7) >> 3;
/* Is there a reason why fbconsole couldn't handle any charcount >256?
* If not this check should be changed to charcount < 256 */
if (charcount != 256 && charcount != 512)
return -EINVAL;
size = h * pitch * charcount;
new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
if (!new_data)
return -ENOMEM;
new_data += FONT_EXTRA_WORDS * sizeof(int);
FNTSIZE(new_data) = size;
FNTCHARCNT(new_data) = charcount;
REFCOUNT(new_data) = 0; /* usage counter */
for (i=0; i< charcount; i++) {
memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
}
/* Since linux has a nice crc32 function use it for counting font
* checksums. */
csum = crc32(0, new_data, size);
FNTSUM(new_data) = csum;
/* Check if the same font is on some other console already */
for (i = 0; i < MAX_NR_CONSOLES; i++) {
struct vc_data *tmp = vc_cons[i].d;
if (fb_display[i].userfont &&
fb_display[i].fontdata &&
FNTSUM(fb_display[i].fontdata) == csum &&
FNTSIZE(fb_display[i].fontdata) == size &&
tmp->vc_font.width == w &&
!memcmp(fb_display[i].fontdata, new_data, size)) {
kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
new_data = (u8 *)fb_display[i].fontdata;
break;
}
}
return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
}
static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
const struct font_desc *f;
if (!name)
f = get_default_font(info->var.xres, info->var.yres);
else if (!(f = find_font(name)))
return -ENOENT;
font->width = f->width;
font->height = f->height;
return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
}
static u16 palette_red[16];
static u16 palette_green[16];
static u16 palette_blue[16];
static struct fb_cmap palette_cmap = {
0, 16, palette_red, palette_green, palette_blue, NULL
};
static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
{
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
int i, j, k, depth;
u8 val;
if (fbcon_is_inactive(vc, info))
return -EINVAL;
if (!CON_IS_VISIBLE(vc))
return 0;
depth = fb_get_color_depth(&info->var, &info->fix);
if (depth > 3) {
for (i = j = 0; i < 16; i++) {
k = table[i];
val = vc->vc_palette[j++];
palette_red[k] = (val << 8) | val;
val = vc->vc_palette[j++];
palette_green[k] = (val << 8) | val;
val = vc->vc_palette[j++];
palette_blue[k] = (val << 8) | val;
}
palette_cmap.len = 16;
palette_cmap.start = 0;
/*
* If framebuffer is capable of less than 16 colors,
* use default palette of fbcon.
*/
} else
fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
return fb_set_cmap(&palette_cmap, info);
}
static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
{
unsigned long p;
int line;
if (vc->vc_num != fg_console || !softback_lines)
return (u16 *) (vc->vc_origin + offset);
line = offset / vc->vc_size_row;
if (line >= softback_lines)
return (u16 *) (vc->vc_origin + offset -
softback_lines * vc->vc_size_row);
p = softback_curr + offset;
if (p >= softback_end)
p += softback_buf - softback_end;
return (u16 *) p;
}
static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
int *px, int *py)
{
unsigned long ret;
int x, y;
if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
unsigned long offset = (pos - vc->vc_origin) / 2;
x = offset % vc->vc_cols;
y = offset / vc->vc_cols;
if (vc->vc_num == fg_console)
y += softback_lines;
ret = pos + (vc->vc_cols - x) * 2;
} else if (vc->vc_num == fg_console && softback_lines) {
unsigned long offset = pos - softback_curr;
if (pos < softback_curr)
offset += softback_end - softback_buf;
offset /= 2;
x = offset % vc->vc_cols;
y = offset / vc->vc_cols;
ret = pos + (vc->vc_cols - x) * 2;
if (ret == softback_end)
ret = softback_buf;
if (ret == softback_in)
ret = vc->vc_origin;
} else {
/* Should not happen */
x = y = 0;
ret = vc->vc_origin;
}
if (px)
*px = x;
if (py)
*py = y;
return ret;
}
/* As we might be inside of softback, we may work with non-contiguous buffer,
that's why we have to use a separate routine. */
static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
{
while (cnt--) {
u16 a = scr_readw(p);
if (!vc->vc_can_do_color)
a ^= 0x0800;
else if (vc->vc_hi_font_mask == 0x100)
a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
(((a) & 0x0e00) << 4);
else
a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
(((a) & 0x0700) << 4);
scr_writew(a, p++);
if (p == (u16 *) softback_end)
p = (u16 *) softback_buf;
if (p == (u16 *) softback_in)
p = (u16 *) vc->vc_origin;
}
}
static int fbcon_scrolldelta(struct vc_data *vc, int lines)
{
struct fb_info *info = registered_fb[con2fb_map[fg_console]];
struct display *p = &fb_display[fg_console];
int offset, limit, scrollback_old;
if (softback_top) {
if (vc->vc_num != fg_console)
return 0;
if (vc->vc_mode != KD_TEXT || !lines)
return 0;
if (logo_shown >= 0) {
struct vc_data *conp2 = vc_cons[logo_shown].d;
if (conp2->vc_top == logo_lines
&& conp2->vc_bottom == conp2->vc_rows)
conp2->vc_top = 0;
if (logo_shown == vc->vc_num) {
unsigned long p, q;
int i;
p = softback_in;
q = vc->vc_origin +
logo_lines * vc->vc_size_row;
for (i = 0; i < logo_lines; i++) {
if (p == softback_top)
break;
if (p == softback_buf)
p = softback_end;
p -= vc->vc_size_row;
q -= vc->vc_size_row;
scr_memcpyw((u16 *) q, (u16 *) p,
vc->vc_size_row);
}
softback_in = p;
update_region(vc, vc->vc_origin,
logo_lines * vc->vc_cols);
}
logo_shown = FBCON_LOGO_CANSHOW;
}
fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
fbcon_redraw_softback(vc, p, lines);
fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
return 0;
}
if (!scrollback_phys_max)
return -ENOSYS;
scrollback_old = scrollback_current;
scrollback_current -= lines;
if (scrollback_current < 0)
scrollback_current = 0;
else if (scrollback_current > scrollback_max)
scrollback_current = scrollback_max;
if (scrollback_current == scrollback_old)
return 0;
if (fbcon_is_inactive(vc, info))
return 0;
fbcon_cursor(vc, CM_ERASE);
offset = p->yscroll - scrollback_current;
limit = p->vrows;
switch (p->scrollmode) {
case SCROLL_WRAP_MOVE:
info->var.vmode |= FB_VMODE_YWRAP;
break;
case SCROLL_PAN_MOVE:
case SCROLL_PAN_REDRAW:
limit -= vc->vc_rows;
info->var.vmode &= ~FB_VMODE_YWRAP;
break;
}
if (offset < 0)
offset += limit;
else if (offset >= limit)
offset -= limit;
info->var.xoffset = 0;
info->var.yoffset = offset * vc->vc_font.height;
update_var(vc->vc_num, info);
if (!scrollback_current)
fbcon_cursor(vc, CM_DRAW);
return 0;
}
static int fbcon_set_origin(struct vc_data *vc)
{
if (softback_lines)
fbcon_scrolldelta(vc, softback_lines);
return 0;
}
static void fbcon_suspended(struct fb_info *info)
{
struct vc_data *vc = NULL;
struct fbcon_ops *ops = info->fbcon_par;
if (!ops || ops->currcon < 0)
return;
vc = vc_cons[ops->currcon].d;
/* Clear cursor, restore saved data */
fbcon_cursor(vc, CM_ERASE);
}
static void fbcon_resumed(struct fb_info *info)
{
struct vc_data *vc;
struct fbcon_ops *ops = info->fbcon_par;
if (!ops || ops->currcon < 0)
return;
vc = vc_cons[ops->currcon].d;
update_screen(vc);
}
static void fbcon_modechanged(struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
struct vc_data *vc;
struct display *p;
int rows, cols;
if (!ops || ops->currcon < 0)
return;
vc = vc_cons[ops->currcon].d;
if (vc->vc_mode != KD_TEXT || registered_fb[con2fb_map[ops->currcon]] != info)
return;
p = &fb_display[vc->vc_num];
info->var.xoffset = info->var.yoffset = p->yscroll = 0;
if (CON_IS_VISIBLE(vc)) {
var_to_display(p, &info->var, info);
cols = info->var.xres / vc->vc_font.width;
rows = info->var.yres / vc->vc_font.height;
vc_resize(vc, cols, rows);
updatescrollmode(p, info, vc);
scrollback_max = 0;
scrollback_current = 0;
update_var(vc->vc_num, info);
fbcon_set_palette(vc, color_table);
update_screen(vc);
if (softback_buf) {
int l = fbcon_softback_size / vc->vc_size_row;
if (l > 5)
softback_end = softback_buf + l * vc->vc_size_row;
else {
/* Smaller scrollback makes no sense, and 0
would screw the operation totally */
softback_top = 0;
}
}
}
}
static void fbcon_set_all_vcs(struct fb_info *info)
{
struct fbcon_ops *ops = info->fbcon_par;
struct vc_data *vc;
struct display *p;
int i, rows, cols;
if (!ops || ops->currcon < 0)
return;
for (i = 0; i < MAX_NR_CONSOLES; i++) {
vc = vc_cons[i].d;
if (!vc || vc->vc_mode != KD_TEXT ||
registered_fb[con2fb_map[i]] != info)
continue;
p = &fb_display[vc->vc_num];
info->var.xoffset = info->var.yoffset = p->yscroll = 0;
var_to_display(p, &info->var, info);
cols = info->var.xres / vc->vc_font.width;
rows = info->var.yres / vc->vc_font.height;
vc_resize(vc, cols, rows);
if (CON_IS_VISIBLE(vc)) {
updatescrollmode(p, info, vc);
scrollback_max = 0;
scrollback_current = 0;
update_var(vc->vc_num, info);
fbcon_set_palette(vc, color_table);
update_screen(vc);
if (softback_buf) {
int l = fbcon_softback_size / vc->vc_size_row;
if (l > 5)
softback_end = softback_buf + l * vc->vc_size_row;
else {
/* Smaller scrollback makes no sense, and 0
would screw the operation totally */
softback_top = 0;
}
}
}
}
}
static int fbcon_mode_deleted(struct fb_info *info,
struct fb_videomode *mode)
{
struct fb_info *fb_info;
struct display *p;
int i, j, found = 0;
/* before deletion, ensure that mode is not in use */
for (i = first_fb_vc; i <= last_fb_vc; i++) {
j = con2fb_map[i];
if (j == -1)
continue;
fb_info = registered_fb[j];
if (fb_info != info)
continue;
p = &fb_display[i];
if (!p || !p->mode)
continue;
if (fb_mode_is_equal(p->mode, mode)) {
found = 1;
break;
}
}
return found;
}
static int fbcon_fb_registered(int idx)
{
int ret = 0, i;
if (info_idx == -1) {
for (i = 0; i < MAX_NR_CONSOLES; i++) {
if (con2fb_map_boot[i] == idx) {
info_idx = idx;
break;
}
}
if (info_idx != -1)
ret = fbcon_takeover(1);
} else {
for (i = 0; i < MAX_NR_CONSOLES; i++) {
if (con2fb_map_boot[i] == idx)
set_con2fb_map(i, idx, 0);
}
}
return ret;
}
static void fbcon_fb_blanked(struct fb_info *info, int blank)
{
struct fbcon_ops *ops = info->fbcon_par;
struct vc_data *vc;
if (!ops || ops->currcon < 0)
return;
vc = vc_cons[ops->currcon].d;
if (vc->vc_mode != KD_TEXT ||
registered_fb[con2fb_map[ops->currcon]] != info)
return;
if (CON_IS_VISIBLE(vc)) {
if (blank)
do_blank_screen(0);
else
do_unblank_screen(0);
}
ops->blank_state = blank;
}
static void fbcon_new_modelist(struct fb_info *info)
{
int i;
struct vc_data *vc;
struct fb_var_screeninfo var;
struct fb_videomode *mode;
for (i = 0; i < MAX_NR_CONSOLES; i++) {
if (registered_fb[con2fb_map[i]] != info)
continue;
if (!fb_display[i].mode)
continue;
vc = vc_cons[i].d;
display_to_var(&var, &fb_display[i]);
mode = fb_find_nearest_mode(&var, &info->modelist);
fb_videomode_to_var(&var, mode);
if (vc)
fbcon_set_disp(info, &var, vc);
else
fbcon_preset_disp(info, &var, i);
}
}
static int fbcon_event_notify(struct notifier_block *self,
unsigned long action, void *data)
{
struct fb_event *event = data;
struct fb_info *info = event->info;
struct fb_videomode *mode;
struct fb_con2fbmap *con2fb;
int ret = 0;
switch(action) {
case FB_EVENT_SUSPEND:
fbcon_suspended(info);
break;
case FB_EVENT_RESUME:
fbcon_resumed(info);
break;
case FB_EVENT_MODE_CHANGE:
fbcon_modechanged(info);
break;
case FB_EVENT_MODE_CHANGE_ALL:
fbcon_set_all_vcs(info);
break;
case FB_EVENT_MODE_DELETE:
mode = event->data;
ret = fbcon_mode_deleted(info, mode);
break;
case FB_EVENT_FB_REGISTERED:
ret = fbcon_fb_registered(info->node);
break;
case FB_EVENT_SET_CONSOLE_MAP:
con2fb = event->data;
ret = set_con2fb_map(con2fb->console - 1,
con2fb->framebuffer, 1);
break;
case FB_EVENT_GET_CONSOLE_MAP:
con2fb = event->data;
con2fb->framebuffer = con2fb_map[con2fb->console - 1];
break;
case FB_EVENT_BLANK:
fbcon_fb_blanked(info, *(int *)event->data);
break;
case FB_EVENT_NEW_MODELIST:
fbcon_new_modelist(info);
break;
}
return ret;
}
/*
* The console `switch' structure for the frame buffer based console
*/
static const struct consw fb_con = {
.owner = THIS_MODULE,
.con_startup = fbcon_startup,
.con_init = fbcon_init,
.con_deinit = fbcon_deinit,
.con_clear = fbcon_clear,
.con_putc = fbcon_putc,
.con_putcs = fbcon_putcs,
.con_cursor = fbcon_cursor,
.con_scroll = fbcon_scroll,
.con_bmove = fbcon_bmove,
.con_switch = fbcon_switch,
.con_blank = fbcon_blank,
.con_font_set = fbcon_set_font,
.con_font_get = fbcon_get_font,
.con_font_default = fbcon_set_def_font,
.con_font_copy = fbcon_copy_font,
.con_set_palette = fbcon_set_palette,
.con_scrolldelta = fbcon_scrolldelta,
.con_set_origin = fbcon_set_origin,
.con_invert_region = fbcon_invert_region,
.con_screen_pos = fbcon_screen_pos,
.con_getxy = fbcon_getxy,
.con_resize = fbcon_resize,
};
static struct notifier_block fbcon_event_notifier = {
.notifier_call = fbcon_event_notify,
};
static int __init fb_console_init(void)
{
int i;
acquire_console_sem();
fb_register_client(&fbcon_event_notifier);
release_console_sem();
for (i = 0; i < MAX_NR_CONSOLES; i++)
con2fb_map[i] = -1;
if (num_registered_fb) {
for (i = 0; i < FB_MAX; i++) {
if (registered_fb[i] != NULL) {
info_idx = i;
break;
}
}
fbcon_takeover(0);
}
return 0;
}
module_init(fb_console_init);
#ifdef MODULE
static void __exit fb_console_exit(void)
{
acquire_console_sem();
fb_unregister_client(&fbcon_event_notifier);
release_console_sem();
give_up_console(&fb_con);
}
module_exit(fb_console_exit);
#endif
MODULE_LICENSE("GPL");
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