/*
* 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 <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
struct display fb_display[MAX_NR_CONSOLES];
char con2fb_map[MAX_NR_CONSOLES];
static int logo_height;
static int logo_lines;
static int logo_shown = -1;
/* Software scrollback */
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;
#define REFCOUNT(fd) (((int *)(fd))[-1])
#define FNTSIZE(fd) (((int *)(fd))[-2])
#define FNTCHARCNT(fd) (((int *)(fd))[-3])
#define FNTSUM(fd) (((int *)(fd))[-4])
#define FONT_EXTRA_WORDS 4
#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 ARM_CURSOR_BLINK_RATE (10)
#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_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);
static int fbcon_font_op(struct vc_data *vc, struct console_font_op *op);
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 void fbcon_set_display(struct vc_data *vc, int init, int logo);
static __inline__ int real_y(struct display *p, int ypos);
static __inline__ void updatescrollmode(struct display *p, struct vc_data *vc);
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);
#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 void fb_flashcursor(void *private)
{
struct fb_info *info = (struct fb_info *) private;
if (!info || info->state != FBINFO_STATE_RUNNING ||
info->cursor.rop == ROP_COPY)
return;
acquire_console_sem();
info->cursor.enable ^= 1;
info->fbops->fb_cursor(info, &info->cursor);
release_console_sem();
}
#if (defined(__arm__) && defined(IRQ_VSYNCPULSE)) || 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);
static struct timer_list cursor_timer =
TIMER_INITIALIZER(cursor_timer_handler, 0, 0);
static void cursor_timer_handler(unsigned long dev_addr)
{
struct fb_info *info = (struct fb_info *) dev_addr;
schedule_work(&info->queue);
mod_timer(&cursor_timer, jiffies + HZ/5);
}
int __init fb_console_setup(char *this_opt)
{
int unit, i, j;
char *options;
if (!this_opt || !*this_opt)
return 0;
while ((options = strsep(&this_opt, ",")) != NULL) {
if (!strncmp(options, "font:", 5)) {
for (unit = 0; unit < MAX_NR_CONSOLES; unit++)
strcpy(fb_display[unit].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[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);
/**
* set_con2fb_map - map console to frame buffer device
* @unit: virtual console number to map
* @newidx: frame buffer index to map virtual console to
*
* Maps a virtual console @unit to a frame buffer device
* @newidx.
*/
int set_con2fb_map(int unit, int newidx)
{
struct vc_data *vc = vc_cons[unit].d;
if (!vc)
return -ENODEV;
con2fb_map[unit] = newidx;
fbcon_is_default = (vc->vc_sw == &fb_con) ? 1 : 0;
take_over_console(&fb_con, unit, unit, fbcon_is_default);
return 0;
}
/*
* drawing helpers
*/
static void putcs_unaligned(struct vc_data *vc, struct fb_info *info,
struct fb_image *image, int count,
const unsigned short *s)
{
unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
unsigned int width = (vc->vc_font.width + 7) >> 3;
unsigned int cellsize = vc->vc_font.height * width;
unsigned int maxcnt = info->pixmap.size/cellsize;
unsigned int shift_low = 0, mod = vc->vc_font.width % 8;
unsigned int shift_high = 8, size, pitch, cnt, k;
unsigned int buf_align = info->pixmap.buf_align - 1;
unsigned int scan_align = info->pixmap.scan_align - 1;
unsigned int idx = vc->vc_font.width >> 3;
u8 mask, *src, *dst, *dst0;
while (count) {
if (count > maxcnt)
cnt = k = maxcnt;
else
cnt = k = count;
image->width = vc->vc_font.width * cnt;
pitch = ((image->width + 7) >> 3) + scan_align;
pitch &= ~scan_align;
size = pitch * vc->vc_font.height + buf_align;
size &= ~buf_align;
dst0 = info->pixmap.addr + fb_get_buffer_offset(info, size);
image->data = dst0;
while (k--) {
src = vc->vc_font.data + (scr_readw(s++) & charmask)*
cellsize;
dst = dst0;
mask = (u8) (0xfff << shift_high);
move_buf_unaligned(info, dst, src, pitch, image->height,
mask, shift_high, shift_low, mod, idx);
shift_low += mod;
dst0 += (shift_low >= 8) ? width : width - 1;
shift_low &= 7;
shift_high = 8 - shift_low;
}
info->fbops->fb_imageblit(info, image);
image->dx += cnt * vc->vc_font.width;
count -= cnt;
}
}
static void putcs_aligned(struct vc_data *vc, struct fb_info *info,
struct fb_image *image, int count,
const unsigned short *s)
{
unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
unsigned int width = vc->vc_font.width >> 3;
unsigned int cellsize = vc->vc_font.height * width;
unsigned int maxcnt = info->pixmap.size/cellsize;
unsigned int scan_align = info->pixmap.scan_align - 1;
unsigned int buf_align = info->pixmap.buf_align - 1;
unsigned int pitch, cnt, size, k;
u8 *src, *dst, *dst0;
while (count) {
if (count > maxcnt)
cnt = k = maxcnt;
else
cnt = k = count;
pitch = width * cnt + scan_align;
pitch &= ~scan_align;
size = pitch * vc->vc_font.height + buf_align;
size &= ~buf_align;
image->width = vc->vc_font.width * cnt;
dst0 = info->pixmap.addr + fb_get_buffer_offset(info, size);
image->data = dst0;
while (k--) {
src = vc->vc_font.data + (scr_readw(s++)&charmask)*cellsize;
dst = dst0;
move_buf_aligned(info, dst, src, pitch, width, image->height);
dst0 += width;
}
info->fbops->fb_imageblit(info, image);
image->dx += cnt * vc->vc_font.width;
count -= cnt;
}
}
/*
* Accelerated handlers.
*/
void accel_bmove(struct vc_data *vc, struct fb_info *info, int sy,
int sx, int dy, int dx, int height, int width)
{
struct fb_copyarea area;
area.sx = sx * vc->vc_font.width;
area.sy = sy * vc->vc_font.height;
area.dx = dx * vc->vc_font.width;
area.dy = dy * vc->vc_font.height;
area.height = height * vc->vc_font.height;
area.width = width * vc->vc_font.width;
info->fbops->fb_copyarea(info, &area);
}
void accel_clear(struct vc_data *vc, struct fb_info *info, int sy,
int sx, int height, int width)
{
int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
struct fb_fillrect region;
region.color = attr_bgcol_ec(bgshift, vc);
region.dx = sx * vc->vc_font.width;
region.dy = sy * vc->vc_font.height;
region.width = width * vc->vc_font.width;
region.height = height * vc->vc_font.height;
region.rop = ROP_COPY;
info->fbops->fb_fillrect(info, ®ion);
}
static void accel_putc(struct vc_data *vc, struct fb_info *info,
int c, int ypos, int xpos)
{
unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
unsigned int width = (vc->vc_font.width + 7) >> 3;
unsigned int scan_align = info->pixmap.scan_align - 1;
unsigned int buf_align = info->pixmap.buf_align - 1;
int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
int fgshift = (vc->vc_hi_font_mask) ? 9 : 8;
unsigned int size, pitch;
struct fb_image image;
u8 *src, *dst;
image.dx = xpos * vc->vc_font.width;
image.dy = ypos * vc->vc_font.height;
image.width = vc->vc_font.width;
image.height = vc->vc_font.height;
image.fg_color = attr_fgcol(fgshift, c);
image.bg_color = attr_bgcol(bgshift, c);
image.depth = 1;
pitch = width + scan_align;
pitch &= ~scan_align;
size = pitch * vc->vc_font.height;
size += buf_align;
size &= ~buf_align;
dst = info->pixmap.addr + fb_get_buffer_offset(info, size);
image.data = dst;
src = vc->vc_font.data + (c & charmask) * vc->vc_font.height * width;
move_buf_aligned(info, dst, src, pitch, width, image.height);
info->fbops->fb_imageblit(info, &image);
}
void accel_putcs(struct vc_data *vc, struct fb_info *info,
const unsigned short *s, int count, int yy, int xx)
{
int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
int fgshift = (vc->vc_hi_font_mask) ? 9 : 8;
struct fb_image image;
u16 c = scr_readw(s);
image.fg_color = attr_fgcol(fgshift, c);
image.bg_color = attr_bgcol(bgshift, c);
image.dx = xx * vc->vc_font.width;
image.dy = yy * vc->vc_font.height;
image.height = vc->vc_font.height;
image.depth = 1;
if (!(vc->vc_font.width & 7))
putcs_aligned(vc, info, &image, count, s);
else
putcs_unaligned(vc, info, &image, count, s);
}
void accel_clear_margins(struct vc_data *vc, struct fb_info *info,
int bottom_only)
{
int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
unsigned int cw = vc->vc_font.width;
unsigned int ch = vc->vc_font.height;
unsigned int rw = info->var.xres - (vc->vc_cols*cw);
unsigned int bh = info->var.yres - (vc->vc_rows*ch);
unsigned int rs = info->var.xres - rw;
unsigned int bs = info->var.yres - bh;
struct fb_fillrect region;
region.color = attr_bgcol_ec(bgshift, vc);
region.rop = ROP_COPY;
if (rw && !bottom_only) {
region.dx = info->var.xoffset + rs;
region.dy = 0;
region.width = rw;
region.height = info->var.yres_virtual;
info->fbops->fb_fillrect(info, ®ion);
}
if (bh) {
region.dx = info->var.xoffset;
region.dy = info->var.yoffset + bs;
region.width = rs;
region.height = bh;
info->fbops->fb_fillrect(info, ®ion);
}
}
/*
* Low Level Operations
*/
/* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
static const char *fbcon_startup(void)
{
const char *display_desc = "frame buffer device";
struct font_desc *font = NULL;
struct module *owner;
struct fb_info *info;
struct vc_data *vc;
static int done = 0;
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 || done)
return display_desc;
done = 1;
info = registered_fb[0];
if (!info) return NULL;
info->currcon = -1;
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);
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;
}
font = get_default_font(info->var.xres, info->var.yres);
vc = (struct vc_data *) kmalloc(sizeof(struct vc_data), GFP_ATOMIC);
if (!vc) {
if (softback_buf)
kfree((void *) softback_buf);
return NULL;
}
/* Setup default font */
vc->vc_font.data = font->data;
vc->vc_font.width = font->width;
vc->vc_font.height = font->height;
vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
vc->vc_cols = info->var.xres/vc->vc_font.width;
vc->vc_rows = info->var.yres/vc->vc_font.height;
/* We trust the mode the driver supplies. */
if (info->fbops->fb_set_par)
info->fbops->fb_set_par(info);
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);
info->display_fg = vc;
#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 */
#if defined(__arm__) && defined(IRQ_VSYNCPULSE)
cursor_blink_rate = ARM_CURSOR_BLINK_RATE;
irqres = request_irq(IRQ_VSYNCPULSE, fb_vbl_handler, SA_SHIRQ,
"framebuffer vbl", info);
#endif
/* Initialize the work queue. If the driver provides its
* own work queue this means it will use something besides
* default timer to flash the cursor. */
if (!info->queue.func) {
INIT_WORK(&info->queue, fb_flashcursor, info);
cursor_timer.expires = jiffies + HZ / 5;
cursor_timer.data = (unsigned long ) info;
add_timer(&cursor_timer);
}
return display_desc;
}
static void fbcon_init(struct vc_data *vc, int init)
{
int unit = vc->vc_num;
struct fb_info *info;
/* on which frame buffer will we open this console? */
info = registered_fb[(int) con2fb_map[unit]];
if (info->var.accel_flags)
fb_display[unit].scrollmode = SCROLL_YNOMOVE;
else
fb_display[unit].scrollmode = SCROLL_YREDRAW;
fbcon_set_display(vc, init, !init);
}
static void fbcon_deinit(struct vc_data *vc)
{
struct display *p = &fb_display[vc->vc_num];
fbcon_free_font(p);
}
static __inline__ void updatescrollmode(struct display *p, struct vc_data *vc)
{
struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
int m;
if (p->scrollmode & __SCROLL_YFIXED)
return;
if (divides(info->fix.ywrapstep, vc->vc_font.height) &&
divides(vc->vc_font.height, info->var.yres_virtual))
m = __SCROLL_YWRAP;
else if (divides(info->fix.ypanstep, vc->vc_font.height) &&
info->var.yres_virtual >= info->var.yres + vc->vc_font.height)
m = __SCROLL_YPAN;
else if (p->scrollmode & __SCROLL_YNOMOVE)
m = __SCROLL_YREDRAW;
else
m = __SCROLL_YMOVE;
p->scrollmode = (p->scrollmode & ~__SCROLL_YMASK) | m;
}
static void fbcon_set_display(struct vc_data *vc, int init, int logo)
{
struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
int nr_rows, nr_cols;
int old_rows, old_cols;
unsigned short *save = NULL, *r, *q;
int i, charcnt = 256;
struct font_desc *font;
if (vc->vc_num != fg_console || (info->flags & FBINFO_FLAG_MODULE) ||
info->fix.type == FB_TYPE_TEXT)
logo = 0;
info->var.xoffset = info->var.yoffset = p->yscroll = 0; /* reset wrap/pan */
for (i = 0; i < MAX_NR_CONSOLES; i++)
if (vc && i != vc->vc_num && fb_display[i].fontdata)
break;
fbcon_free_font(p);
if (i < MAX_NR_CONSOLES) {
struct display *q = &fb_display[i];
struct vc_data *tmp = vc_cons[i].d;
if (vc->vc_font.width > 32) {
/* If we are not the first console on this
fb, copy the font from that console */
vc->vc_font.width = tmp->vc_font.width;
vc->vc_font.height = tmp->vc_font.height;
vc->vc_font.data = p->fontdata = q->fontdata;
p->userfont = q->userfont;
if (p->userfont) {
REFCOUNT(p->fontdata)++;
charcnt = FNTCHARCNT(p->fontdata);
}
con_copy_unimap(vc->vc_num, i);
}
}
if (!p->fontdata) {
if (!p->fontname[0] || !(font = find_font(p->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 = p->fontdata = font->data;
}
updatescrollmode(p, vc);
old_cols = vc->vc_cols;
old_rows = vc->vc_rows;
nr_cols = info->var.xres / vc->vc_font.width;
nr_rows = info->var.yres / vc->vc_font.height;
if (logo) {
/* Need to make room for the logo */
int cnt;
int step;
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 * old_rows);
step = logo_lines * old_cols;
for (r = q - logo_lines * old_cols; r < q; r++)
if (scr_readw(r) != vc->vc_video_erase_char)
break;
if (r != q && nr_rows >= old_rows + logo_lines) {
save =
kmalloc(logo_lines * nr_cols * 2, GFP_KERNEL);
if (save) {
int i =
old_cols <
nr_cols ? old_cols : nr_cols;
scr_memsetw(save, vc->vc_video_erase_char,
logo_lines * nr_cols * 2);
r = q - step;
for (cnt = 0; cnt < logo_lines;
cnt++, r += i)
scr_memcpyw(save + cnt * nr_cols,
r, 2 * i);
r = q;
}
}
if (r == q) {
/* We can scroll screen down */
r = q - step - old_cols;
for (cnt = old_rows - logo_lines; cnt > 0; cnt--) {
scr_memcpyw(r + step, r, vc->vc_size_row);
r -= old_cols;
}
if (!save) {
vc->vc_y += logo_lines;
vc->vc_pos += logo_lines * vc->vc_size_row;
}
}
scr_memsetw((unsigned short *) vc->vc_origin,
vc->vc_video_erase_char,
vc->vc_size_row * logo_lines);
}
/*
* ++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 = nr_cols;
vc->vc_rows = nr_rows;
}
p->vrows = info->var.yres_virtual / vc->vc_font.height;
if(info->var.yres > (vc->vc_font.height * (vc->vc_rows + 1))) {
p->vrows -= (info->var.yres - (vc->vc_font.height * vc->vc_rows)) / vc->vc_font.height;
}
if ((info->var.yres % vc->vc_font.height) &&
(info->var.yres_virtual % vc->vc_font.height <
info->var.yres % vc->vc_font.height))
p->vrows--;
vc->vc_can_do_color = info->var.bits_per_pixel != 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 (!init) {
if (vc->vc_cols != nr_cols || vc->vc_rows != nr_rows)
vc_resize(vc->vc_num, nr_cols, nr_rows);
else if (CON_IS_VISIBLE(vc) &&
vt_cons[vc->vc_num]->vc_mode == KD_TEXT) {
accel_clear_margins(vc, info, 0);
update_screen(vc->vc_num);
}
if (save) {
q = (unsigned short *) (vc->vc_origin +
vc->vc_size_row *
old_rows);
scr_memcpyw(q, save, logo_lines * nr_cols * 2);
vc->vc_y += logo_lines;
vc->vc_pos += logo_lines * vc->vc_size_row;
kfree(save);
}
}
if (logo) {
if (logo_lines > vc->vc_bottom) {
logo_shown = -1;
printk(KERN_INFO
"fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
} else {
logo_shown = -2;
vc->vc_top = logo_lines;
}
}
if (vc->vc_num == fg_console && 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;
}
}
}
/* ====================================================================== */
/* 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()
*
* 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[(int) con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
u_int y_break;
if (!info->fbops->fb_blank && console_blanked)
return;
if (info->state != FBINFO_STATE_RUNNING)
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;
accel_clear(vc, info, real_y(p, sy), sx, b, width);
accel_clear(vc, info, real_y(p, sy + b), sx, height - b,
width);
} else
accel_clear(vc, info, real_y(p, sy), sx, height, width);
}
static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
{
struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
if (!info->fbops->fb_blank && console_blanked)
return;
if (info->state != FBINFO_STATE_RUNNING)
return;
if (vt_cons[vc->vc_num]->vc_mode != KD_TEXT)
return;
accel_putc(vc, info, c, real_y(p, ypos), xpos);
}
static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
int count, int ypos, int xpos)
{
struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
if (!info->fbops->fb_blank && console_blanked)
return;
if (info->state != FBINFO_STATE_RUNNING)
return;
if (vt_cons[vc->vc_num]->vc_mode != KD_TEXT)
return;
accel_putcs(vc, info, s, count, real_y(p, ypos), xpos);
}
static void fbcon_cursor(struct vc_data *vc, int mode)
{
struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
int fgshift = (vc->vc_hi_font_mask) ? 9 : 8;
struct display *p = &fb_display[vc->vc_num];
int w = (vc->vc_font.width + 7) >> 3, c;
int y = real_y(p, vc->vc_y);
struct fb_cursor cursor;
if (mode & CM_SOFTBACK) {
mode &= ~CM_SOFTBACK;
if (softback_lines) {
if (y + softback_lines >= vc->vc_rows)
mode = CM_ERASE;
else
y += softback_lines;
}
} else if (softback_lines)
fbcon_set_origin(vc);
c = scr_readw((u16 *) vc->vc_pos);
cursor.image.data = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));
cursor.set = FB_CUR_SETCUR;
cursor.image.depth = 1;
switch (mode) {
case CM_ERASE:
if (info->cursor.rop == ROP_XOR) {
info->cursor.enable = 0;
info->cursor.rop = ROP_COPY;
info->fbops->fb_cursor(info, &cursor);
}
break;
case CM_MOVE:
case CM_DRAW:
info->cursor.enable = 1;
if (info->cursor.image.fg_color != attr_fgcol(fgshift, c) ||
info->cursor.image.bg_color != attr_bgcol(bgshift, c)) {
cursor.image.fg_color = attr_fgcol(fgshift, c);
cursor.image.bg_color = attr_bgcol(bgshift, c);
cursor.set |= FB_CUR_SETCMAP;
}
if ((info->cursor.image.dx != (vc->vc_font.width * vc->vc_x)) ||
(info->cursor.image.dy != (vc->vc_font.height * y))) {
cursor.image.dx = vc->vc_font.width * vc->vc_x;
cursor.image.dy = vc->vc_font.height * y;
cursor.set |= FB_CUR_SETPOS;
}
if (info->cursor.image.height != vc->vc_font.height ||
info->cursor.image.width != vc->vc_font.width) {
cursor.image.height = vc->vc_font.height;
cursor.image.width = vc->vc_font.width;
cursor.set |= FB_CUR_SETSIZE;
}
if (info->cursor.hot.x || info->cursor.hot.y) {
cursor.hot.x = cursor.hot.y = 0;
cursor.set |= FB_CUR_SETHOT;
}
if ((cursor.set & FB_CUR_SETSIZE) || ((vc->vc_cursor_type & 0x0f) != p->cursor_shape)) {
char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
int cur_height, size, i = 0;
if (!mask) return;
if (info->cursor.mask)
kfree(info->cursor.mask);
info->cursor.mask = mask;
p->cursor_shape = vc->vc_cursor_type & 0x0f;
cursor.set |= FB_CUR_SETSHAPE;
switch (vc->vc_cursor_type & 0x0f) {
case CUR_NONE:
cur_height = 0;
break;
case CUR_UNDERLINE:
cur_height = (vc->vc_font.height < 10) ? 1 : 2;
break;
case CUR_LOWER_THIRD:
cur_height = vc->vc_font.height/3;
break;
case CUR_LOWER_HALF:
cur_height = vc->vc_font.height >> 1;
break;
case CUR_TWO_THIRDS:
cur_height = (vc->vc_font.height << 1)/3;
break;
case CUR_BLOCK:
default:
cur_height = vc->vc_font.height;
break;
}
size = (vc->vc_font.height - cur_height) * w;
while (size--)
mask[i++] = 0;
size = cur_height * w;
while (size--)
mask[i++] = 0xff;
}
info->cursor.rop = ROP_XOR;
info->fbops->fb_cursor(info, &cursor);
vbl_cursor_cnt = CURSOR_DRAW_DELAY;
break;
}
}
static int scrollback_phys_max = 0;
static int scrollback_max = 0;
static int scrollback_current = 0;
int update_var(int con, struct fb_info *info)
{
if (con == info->currcon)
return fb_pan_display(info, &info->var);
return 0;
}
static __inline__ void ywrap_up(struct vc_data *vc, int count)
{
struct fb_info *info = registered_fb[(int) 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[(int) 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[(int) con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
p->yscroll += count;
if (p->yscroll > p->vrows - vc->vc_rows) {
accel_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);
accel_clear_margins(vc, info, 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[(int) con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
p->yscroll -= count;
if (p->yscroll < 0) {
accel_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);
accel_clear_margins(vc, info, 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)
{
struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
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) {
accel_putcs(vc, info, start, s - start,
real_y(p, line), x);
x += s - start;
start = s;
}
}
if (c == scr_readw(d)) {
if (s > start) {
accel_putcs(vc, info, start, s - start,
real_y(p, line), x);
x += s - start + 1;
start = s + 1;
} else {
x++;
start++;
}
}
s++;
d++;
} while (s < le);
if (s > start)
accel_putcs(vc, info, start, s - start,
real_y(p, 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(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);
struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
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) {
accel_putcs(vc, info, start, s - start,
real_y(p, line), x);
x += s - start;
start = s;
}
}
if (c == scr_readw(d)) {
if (s > start) {
accel_putcs(vc, info, start, s - start,
real_y(p, 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)
accel_putcs(vc, info, start, s - start,
real_y(p, 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[(int) con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
int scroll_partial = !(p->scrollmode & __SCROLL_YNOPARTIAL);
if (!info->fbops->fb_blank && console_blanked)
return 0;
if (!count || vt_cons[vc->vc_num]->vc_mode != KD_TEXT)
return 0;
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 & __SCROLL_YMASK) {
case __SCROLL_YMOVE:
accel_bmove(vc, info, t + count, 0, t, 0,
b - t - count, vc->vc_cols);
accel_clear(vc, info, b - count, 0, count,
vc->vc_cols);
break;
case __SCROLL_YWRAP:
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 (p->scrollmode & __SCROLL_YPANREDRAW)
goto redraw_up;
else
fbcon_bmove(vc, t + count, 0, t, 0,
b - t - count, vc->vc_cols);
fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
break;
case __SCROLL_YPAN:
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 (p->scrollmode & __SCROLL_YPANREDRAW)
goto redraw_up;
else
fbcon_bmove(vc, t + count, 0, t, 0,
b - t - count, vc->vc_cols);
fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
break;
case __SCROLL_YREDRAW:
redraw_up:
fbcon_redraw(vc, p, t, b - t - count,
count * vc->vc_cols);
accel_clear(vc, info, real_y(p, 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;
switch (p->scrollmode & __SCROLL_YMASK) {
case __SCROLL_YMOVE:
accel_bmove(vc, info, t, 0, t + count, 0,
b - t - count, vc->vc_cols);
accel_clear(vc, info, t, 0, count, vc->vc_cols);
break;
case __SCROLL_YWRAP:
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 (p->scrollmode & __SCROLL_YPANREDRAW)
goto redraw_down;
else
fbcon_bmove(vc, t, 0, t + count, 0,
b - t - count, vc->vc_cols);
fbcon_clear(vc, t, 0, count, vc->vc_cols);
break;
case __SCROLL_YPAN:
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 (p->scrollmode & __SCROLL_YPANREDRAW)
goto redraw_down;
else
fbcon_bmove(vc, t, 0, t + count, 0,
b - t - count, vc->vc_cols);
fbcon_clear(vc, t, 0, count, vc->vc_cols);
break;
case __SCROLL_YREDRAW:
redraw_down:
fbcon_redraw(vc, p, b - 1, b - t - count,
-count * vc->vc_cols);
accel_clear(vc, info, real_y(p, 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[(int) con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
if (!info->fbops->fb_blank && console_blanked)
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[(int) con2fb_map[vc->vc_num]];
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;
}
accel_bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
height, width);
}
static int fbcon_resize(struct vc_data *vc, unsigned int width,
unsigned int height)
{
struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
struct fb_var_screeninfo var = info->var;
int err; 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)) {
var.activate = FB_ACTIVATE_TEST;
err = fb_set_var(info, &var);
if (err || width > var.xres/fw ||
height > var.yres/fh)
return -EINVAL;
DPRINTK("resize now %ix%i\n", var.xres, var.yres);
var.activate = FB_ACTIVATE_NOW;
fb_set_var(info, &var);
}
p->vrows = var.yres_virtual/fh;
if (var.yres > (fh * (height + 1)))
p->vrows -= (var.yres - (fh * height)) / fh;
return 0;
}
static int fbcon_switch(struct vc_data *vc)
{
struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
struct display *p = &fb_display[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 = -1;
}
if (info)
info->var.yoffset = p->yscroll = 0;
fbcon_resize(vc, vc->vc_cols, vc->vc_rows);
switch (p->scrollmode & __SCROLL_YMASK) {
case __SCROLL_YWRAP:
scrollback_phys_max = p->vrows - vc->vc_rows;
break;
case __SCROLL_YPAN:
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;
info->currcon = vc->vc_num;
update_var(vc->vc_num, info);
fbcon_set_palette(vc, color_table);
if (vt_cons[vc->vc_num]->vc_mode == KD_TEXT)
accel_clear_margins(vc, info, 0);
if (logo_shown == -2) {
logo_shown = fg_console;
/* This is protected above by initmem_freed */
fb_show_logo(info);
update_region(fg_console,
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 int fbcon_blank(struct vc_data *vc, int blank)
{
unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
if (blank < 0) /* Entering graphics mode */
return 0;
fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
if (!info->fbops->fb_blank) {
if (blank) {
unsigned short oldc;
u_int height;
u_int y_break;
oldc = vc->vc_video_erase_char;
vc->vc_video_erase_char &= charmask;
height = vc->vc_rows;
y_break = p->vrows - p->yscroll;
if (height > y_break) {
accel_clear(vc, info, real_y(p, 0),
0, y_break, vc->vc_cols);
accel_clear(vc, info, real_y(p, y_break),
0, height - y_break,
vc->vc_cols);
} else
accel_clear(vc, info, real_y(p, 0),
0, height, vc->vc_cols);
vc->vc_video_erase_char = oldc;
} else
update_screen(vc->vc_num);
return 0;
} else
return fb_blank(info, blank);
}
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 inline int fbcon_get_font(struct vc_data *vc, struct console_font_op *op)
{
u8 *fontdata = vc->vc_font.data;
u8 *data = op->data;
int i, j;
op->width = vc->vc_font.width;
op->height = vc->vc_font.height;
op->charcount = vc->vc_hi_font_mask ? 512 : 256;
if (!op->data)
return 0;
if (op->width <= 8) {
j = vc->vc_font.height;
for (i = 0; i < op->charcount; i++) {
memcpy(data, fontdata, j);
memset(data + j, 0, 32 - j);
data += 32;
fontdata += j;
}
} else if (op->width <= 16) {
j = vc->vc_font.height * 2;
for (i = 0; i < op->charcount; i++) {
memcpy(data, fontdata, j);
memset(data + j, 0, 64 - j);
data += 64;
fontdata += j;
}
} else if (op->width <= 24) {
for (i = 0; i < op->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 < op->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, struct console_font_op *op,
u8 * data, int userfont)
{
struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
struct display *p = &fb_display[vc->vc_num];
int resize;
int w = op->width;
int h = op->height;
int cnt;
char *old_data = NULL;
if (!w > 32) {
if (userfont && op->op != KD_FONT_OP_COPY)
kfree(data - FONT_EXTRA_WORDS * sizeof(int));
return -ENXIO;
}
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 = 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;
p->vrows = info->var.yres_virtual / h;
#if 0 /* INCOMPLETE - let the console gurus handle this */
if(info->var.yres > (h * (vc->vc_rows + 1))
p->vrows -= (info->var.yres - (h * vc->vc_rows)) / h;
#endif
if ((info->var.yres % h)
&& (info->var.yres_virtual % h < info->var.yres % h))
p->vrows--;
updatescrollmode(p, vc);
vc_resize(vc->vc_num, 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)
&& vt_cons[vc->vc_num]->vc_mode == KD_TEXT) {
accel_clear_margins(vc, info, 0);
update_screen(vc->vc_num);
}
if (old_data && (--REFCOUNT(old_data) == 0))
kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
return 0;
}
static inline int fbcon_copy_font(struct vc_data *vc, struct console_font_op *op)
{
struct display *od;
int h = op->height;
if (h < 0 || !vc_cons_allocated(h))
return -ENOTTY;
if (h == vc->vc_num)
return 0; /* nothing to do */
od = &fb_display[h];
if (od->fontdata == vc->vc_font.data)
return 0; /* already the same font... */
op->width = vc->vc_font.width;
op->height = vc->vc_font.height;
return fbcon_do_set_font(vc, op, od->fontdata, od->userfont);
}
static inline int fbcon_set_font(struct vc_data *vc, struct console_font_op *op)
{
int w = op->width;
int h = op->height;
int size = h;
int i, k;
u8 *new_data, *data = op->data, *p;
if ((w <= 0) || (w > 32)
|| (op->charcount != 256 && op->charcount != 512))
return -EINVAL;
if (w > 8) {
if (w <= 16)
size *= 2;
else
size *= 4;
}
size *= op->charcount;
if (!
(new_data =
kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER)))
return -ENOMEM;
new_data += FONT_EXTRA_WORDS * sizeof(int);
FNTSIZE(new_data) = size;
FNTCHARCNT(new_data) = op->charcount;
REFCOUNT(new_data) = 0; /* usage counter */
p = new_data;
if (w <= 8) {
for (i = 0; i < op->charcount; i++) {
memcpy(p, data, h);
data += 32;
p += h;
}
} else if (w <= 16) {
h *= 2;
for (i = 0; i < op->charcount; i++) {
memcpy(p, data, h);
data += 64;
p += h;
}
} else if (w <= 24) {
for (i = 0; i < op->charcount; i++) {
int j;
for (j = 0; j < h; j++) {
memcpy(p, data, 3);
p[3] = 0;
data += 3;
p += sizeof(u32);
}
data += 3 * (32 - h);
}
} else {
h *= 4;
for (i = 0; i < op->charcount; i++) {
memcpy(p, data, h);
data += 128;
p += h;
}
}
/* we can do it in u32 chunks because of charcount is 256 or 512, so
font length must be multiple of 256, at least. And 256 is multiple
of 4 */
k = 0;
while (p > new_data) {
p = (u8 *)((u32 *)p - 1);
k += *(u32 *) p;
}
FNTSUM(new_data) = k;
/* 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) == k &&
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 = fb_display[i].fontdata;
break;
}
}
return fbcon_do_set_font(vc, op, new_data, 1);
}
static inline int fbcon_set_def_font(struct vc_data *vc, struct console_font_op *op)
{
struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
char name[MAX_FONT_NAME];
struct font_desc *f;
if (!op->data)
f = get_default_font(info->var.xres, info->var.yres);
else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
return -EFAULT;
else {
name[MAX_FONT_NAME - 1] = 0;
if (!(f = find_font(name)))
return -ENOENT;
}
op->width = f->width;
op->height = f->height;
return fbcon_do_set_font(vc, op, f->data, 0);
}
static int fbcon_font_op(struct vc_data *vc, struct console_font_op *op)
{
switch (op->op) {
case KD_FONT_OP_SET:
return fbcon_set_font(vc, op);
case KD_FONT_OP_GET:
return fbcon_get_font(vc, op);
case KD_FONT_OP_SET_DEFAULT:
return fbcon_set_def_font(vc, op);
case KD_FONT_OP_COPY:
return fbcon_copy_font(vc, op);
default:
return -ENOSYS;
}
}
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[(int) con2fb_map[vc->vc_num]];
int i, j, k;
u8 val;
if (!vc->vc_can_do_color
|| (!info->fbops->fb_blank && console_blanked))
return -EINVAL;
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;
}
if (info->var.bits_per_pixel <= 4)
palette_cmap.len = 1 << info->var.bits_per_pixel;
else
palette_cmap.len = 16;
palette_cmap.start = 0;
return fb_set_cmap(&palette_cmap, 1, 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[(int) 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 (vt_cons[vc->vc_num]->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_num, vc->vc_origin,
logo_lines * vc->vc_cols);
}
logo_shown = -1;
}
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 (!info->fbops->fb_blank &&
(console_blanked || vt_cons[vc->vc_num]->vc_mode != KD_TEXT
|| !lines))
return 0;
fbcon_cursor(vc, CM_ERASE);
offset = p->yscroll - scrollback_current;
limit = p->vrows;
switch (p->scrollmode && __SCROLL_YMASK) {
case __SCROLL_YWRAP:
info->var.vmode |= FB_VMODE_YWRAP;
break;
case __SCROLL_YPAN:
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 && !console_blanked)
fbcon_scrolldelta(vc, softback_lines);
return 0;
}
static void fbcon_suspended(struct fb_info *info)
{
/* Clear cursor, restore saved data */
info->cursor.enable = 0;
info->fbops->fb_cursor(info, &info->cursor);
}
static void fbcon_resumed(struct fb_info *info)
{
struct vc_data *vc;
if (info->currcon < 0)
return;
vc = vc_cons[info->currcon].d;
update_screen(vc->vc_num);
}
static int fbcon_event_notify(struct notifier_block *self,
unsigned long action, void *data)
{
struct fb_info *info = (struct fb_info *) data;
switch(action) {
case FB_EVENT_SUSPEND:
fbcon_suspended(info);
break;
case FB_EVENT_RESUME:
fbcon_resumed(info);
break;
}
return 0;
}
/*
* The console `switch' structure for the frame buffer based console
*/
const struct consw fb_con = {
.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_op = fbcon_font_op,
.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_notifer = {
.notifier_call = fbcon_event_notify,
};
static int fbcon_event_notifier_registered;
int __init fb_console_init(void)
{
if (!num_registered_fb)
return -ENODEV;
take_over_console(&fb_con, first_fb_vc, last_fb_vc, fbcon_is_default);
acquire_console_sem();
if (!fbcon_event_notifier_registered) {
fb_register_client(&fbcon_event_notifer);
fbcon_event_notifier_registered = 1;
}
release_console_sem();
return 0;
}
void __exit fb_console_exit(void)
{
acquire_console_sem();
if (fbcon_event_notifier_registered) {
fb_unregister_client(&fbcon_event_notifer);
fbcon_event_notifier_registered = 0;
}
release_console_sem();
give_up_console(&fb_con);
}
module_init(fb_console_init);
module_exit(fb_console_exit);
/*
* Visible symbols for modules
*/
EXPORT_SYMBOL(fb_display);
EXPORT_SYMBOL(fb_con);
MODULE_LICENSE("GPL");
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