--- /dev/null
+/*
+ * 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/module.h>
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/delay.h> /* MSch: for IRQ probe */
+#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/fb.h>
+#include <asm/irq.h>
+
+#include "fbcon.h"
+
+#ifdef FBCONDEBUG
+# define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## 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 */
+};
+
+static 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_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;
+static int fbcon_has_exited;
+static int primary_device = -1;
+static int fbcon_has_console_bind;
+
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
+static int map_override;
+
+static inline void fbcon_map_override(void)
+{
+ map_override = 1;
+}
+#else
+static inline void fbcon_map_override(void)
+{
+}
+#endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
+
+/* font data */
+static char fontname[40];
+
+/* current fb_info */
+static int info_idx = -1;
+
+/* console rotation */
+static int initial_rotation;
+static int fbcon_has_sysfs;
+
+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 int fbcon_set_origin(struct vc_data *);
+
+static int fbcon_cursor_noblink;
+
+#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__ 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,
+ int unit);
+static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
+ int line, int count, int dy);
+static void fbcon_modechanged(struct fb_info *info);
+static void fbcon_set_all_vcs(struct fb_info *info);
+static void fbcon_start(void);
+static void fbcon_exit(void);
+static struct device *fbcon_device;
+
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
+static inline void fbcon_set_rotation(struct fb_info *info)
+{
+ struct fbcon_ops *ops = info->fbcon_par;
+
+ if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
+ ops->p->con_rotate < 4)
+ ops->rotate = ops->p->con_rotate;
+ else
+ ops->rotate = 0;
+}
+
+static void fbcon_rotate(struct fb_info *info, u32 rotate)
+{
+ struct fbcon_ops *ops= info->fbcon_par;
+ struct fb_info *fb_info;
+
+ if (!ops || ops->currcon == -1)
+ return;
+
+ fb_info = registered_fb[con2fb_map[ops->currcon]];
+
+ if (info == fb_info) {
+ struct display *p = &fb_display[ops->currcon];
+
+ if (rotate < 4)
+ p->con_rotate = rotate;
+ else
+ p->con_rotate = 0;
+
+ fbcon_modechanged(info);
+ }
+}
+
+static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
+{
+ struct fbcon_ops *ops = info->fbcon_par;
+ struct vc_data *vc;
+ struct display *p;
+ int i;
+
+ if (!ops || ops->currcon < 0 || rotate > 3)
+ return;
+
+ for (i = first_fb_vc; i <= last_fb_vc; 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];
+ p->con_rotate = rotate;
+ }
+
+ fbcon_set_all_vcs(info);
+}
+#else
+static inline void fbcon_set_rotation(struct fb_info *info)
+{
+ struct fbcon_ops *ops = info->fbcon_par;
+
+ ops->rotate = FB_ROTATE_UR;
+}
+
+static void fbcon_rotate(struct fb_info *info, u32 rotate)
+{
+ return;
+}
+
+static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
+{
+ return;
+}
+#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
+
+static int fbcon_get_rotate(struct fb_info *info)
+{
+ struct fbcon_ops *ops = info->fbcon_par;
+
+ return (ops) ? ops->rotate : 0;
+}
+
+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) &&
+ !vt_force_oops_output(vc);
+}
+
+static 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 = mono_col(info);
+ /* 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 fbcon_update_softback(struct vc_data *vc)
+{
+ 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 fb_flashcursor(struct work_struct *work)
+{
+ struct fb_info *info = container_of(work, struct fb_info, queue);
+ struct fbcon_ops *ops = info->fbcon_par;
+ struct vc_data *vc = NULL;
+ int c;
+ int mode;
+ int ret;
+
+ /* FIXME: we should sort out the unbind locking instead */
+ /* instead we just fail to flash the cursor if we can't get
+ * the lock instead of blocking fbcon deinit */
+ ret = console_trylock();
+ if (ret == 0)
+ return;
+
+ if (ops && ops->currcon != -1)
+ vc = vc_cons[ops->currcon].d;
+
+ if (!vc || !CON_IS_VISIBLE(vc) ||
+ registered_fb[con2fb_map[vc->vc_num]] != info ||
+ vc->vc_deccm != 1) {
+ console_unlock();
+ return;
+ }
+
+ c = scr_readw((u16 *) vc->vc_pos);
+ mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
+ CM_ERASE : CM_DRAW;
+ ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
+ get_color(vc, info, c, 0));
+ console_unlock();
+}
+
+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;
+
+ queue_work(system_power_efficient_wq, &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) &&
+ !fbcon_cursor_noblink) {
+ if (!info->queue.func)
+ INIT_WORK(&info->queue, fb_flashcursor);
+
+ 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 1;
+
+ while ((options = strsep(&this_opt, ",")) != NULL) {
+ if (!strncmp(options, "font:", 5)) {
+ strlcpy(fontname, options + 5, sizeof(fontname));
+ continue;
+ }
+
+ 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;
+ }
+ }
+ continue;
+ }
+
+ 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;
+ }
+
+ fbcon_map_override();
+ }
+ continue;
+ }
+
+ 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;
+ continue;
+ }
+
+ if (!strncmp(options, "rotate:", 7)) {
+ options += 7;
+ if (*options)
+ initial_rotation = simple_strtoul(options, &options, 0);
+ if (initial_rotation > 3)
+ initial_rotation = 0;
+ continue;
+ }
+ }
+ return 1;
+}
+
+__setup("fbcon=", fb_console_setup);
+#endif
+
+static int search_fb_in_map(int idx)
+{
+ int i, retval = 0;
+
+ for (i = first_fb_vc; i <= last_fb_vc; i++) {
+ if (con2fb_map[i] == idx)
+ retval = 1;
+ }
+ return retval;
+}
+
+static int search_for_mapped_con(void)
+{
+ int i, retval = 0;
+
+ for (i = first_fb_vc; i <= last_fb_vc; i++) {
+ if (con2fb_map[i] != -1)
+ retval = 1;
+ }
+ return retval;
+}
+
+static int do_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 = do_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;
+ } else {
+ fbcon_has_console_bind = 1;
+ }
+
+ return err;
+}
+
+#ifdef MODULE
+static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
+ int cols, int rows, int new_cols, int new_rows)
+{
+ logo_shown = FBCON_LOGO_DONTSHOW;
+}
+#else
+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 */
+ struct fbcon_ops *ops = info->fbcon_par;
+ int cnt, erase = vc->vc_video_erase_char, step;
+ unsigned short *save = NULL, *r, *q;
+ int logo_height;
+
+ if (info->flags & FBINFO_MODULE) {
+ logo_shown = FBCON_LOGO_DONTSHOW;
+ return;
+ }
+
+ /*
+ * 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, ops->rotate);
+ logo_lines = DIV_ROUND_UP(logo_height, 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) {
+ int lines;
+ if (vc->vc_y + logo_lines >= rows)
+ lines = rows - vc->vc_y - 1;
+ else
+ lines = logo_lines;
+ vc->vc_y += lines;
+ vc->vc_pos += 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;
+ }
+}
+#endif /* MODULE */
+
+#ifdef CONFIG_FB_TILEBLITTING
+static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
+{
+ struct fbcon_ops *ops = info->fbcon_par;
+
+ ops->p = &fb_display[vc->vc_num];
+
+ if ((info->flags & FBINFO_MISC_TILEBLITTING))
+ fbcon_set_tileops(vc, info);
+ else {
+ fbcon_set_rotation(info);
+ fbcon_set_bitops(ops);
+ }
+}
+
+static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
+{
+ int err = 0;
+
+ if (info->flags & FBINFO_MISC_TILEBLITTING &&
+ info->tileops->fb_get_tilemax(info) < charcount)
+ err = 1;
+
+ return err;
+}
+#else
+static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
+{
+ struct fbcon_ops *ops = info->fbcon_par;
+
+ info->flags &= ~FBINFO_MISC_TILEBLITTING;
+ ops->p = &fb_display[vc->vc_num];
+ fbcon_set_rotation(info);
+ fbcon_set_bitops(ops);
+}
+
+static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
+{
+ return 0;
+}
+
+#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 = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
+ if (!ops)
+ err = -ENOMEM;
+ }
+
+ if (!err) {
+ info->fbcon_par = ops;
+
+ if (vc)
+ set_blitting_type(vc, info);
+ }
+
+ 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, ret;
+
+ 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(ops->cursor_src);
+ kfree(ops->fontbuffer);
+ kfree(oldinfo->fbcon_par);
+ oldinfo->fbcon_par = NULL;
+ module_put(oldinfo->fbops->owner);
+ /*
+ If oldinfo and newinfo are driving the same hardware,
+ the fb_release() method of oldinfo may attempt to
+ restore the hardware state. This will leave the
+ newinfo in an undefined state. Thus, a call to
+ fb_set_par() may be needed for the newinfo.
+ */
+ if (newinfo && newinfo->fbops->fb_set_par) {
+ ret = newinfo->fbops->fb_set_par(newinfo);
+
+ if (ret)
+ printk(KERN_ERR "con2fb_release_oldinfo: "
+ "detected unhandled fb_set_par error, "
+ "error code %d\n", ret);
+ }
+ }
+
+ 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;
+ int ret;
+
+ ops->currcon = fg_console;
+
+ if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
+ ret = info->fbops->fb_set_par(info);
+
+ if (ret)
+ printk(KERN_ERR "con2fb_init_display: detected "
+ "unhandled fb_set_par error, "
+ "error code %d\n", ret);
+ }
+
+ ops->flags |= FBCON_FLAGS_INIT;
+ ops->graphics = 0;
+ fbcon_set_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.
+ *
+ * This should be called with the console lock held.
+ */
+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)
+ return -EINVAL;
+
+ if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
+ info_idx = newidx;
+ return do_fbcon_takeover(0);
+ }
+
+ if (oldidx != -1)
+ oldinfo = registered_fb[oldidx];
+
+ found = search_fb_in_map(newidx);
+
+ 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);
+ }
+
+ if (!search_fb_in_map(info_idx))
+ info_idx = newidx;
+
+ return err;
+}
+
+/*
+ * Low Level Operations
+ */
+/* NOTE: fbcon cannot be __init: it may be called from do_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;
+
+ /*
+ * 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 = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
+ if (!ops) {
+ module_put(owner);
+ return NULL;
+ }
+
+ ops->currcon = -1;
+ ops->graphics = 1;
+ ops->cur_rotate = -1;
+ info->fbcon_par = ops;
+ p->con_rotate = initial_rotation;
+ set_blitting_type(vc, info);
+
+ 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 && !vc->vc_font.data) {
+ if (!fontname[0] || !(font = find_font(fontname)))
+ font = get_default_font(info->var.xres,
+ info->var.yres,
+ info->pixmap.blit_x,
+ info->pixmap.blit_y);
+ 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 */
+ } else {
+ p->fontdata = vc->vc_font.data;
+ }
+
+ cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
+ rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+ cols /= vc->vc_font.width;
+ rows /= 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);
+
+ fbcon_add_cursor_timer(info);
+ fbcon_has_exited = 0;
+ 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, ret;
+
+ 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;
+
+ if (var_to_display(p, &info->var, info))
+ return;
+
+ if (!info->fbcon_par)
+ con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
+
+ /* If we are not the first console on this
+ fb, copy the font from that console */
+ t = &fb_display[fg_console];
+ if (!p->fontdata) {
+ if (t->fontdata) {
+ struct vc_data *fvc = vc_cons[fg_console].d;
+
+ vc->vc_font.data = (void *)(p->fontdata =
+ fvc->vc_font.data);
+ vc->vc_font.width = fvc->vc_font.width;
+ vc->vc_font.height = fvc->vc_font.height;
+ p->userfont = t->userfont;
+
+ if (p->userfont)
+ REFCOUNT(p->fontdata)++;
+ } else {
+ const struct font_desc *font = NULL;
+
+ if (!fontname[0] || !(font = find_font(fontname)))
+ font = get_default_font(info->var.xres,
+ info->var.yres,
+ info->pixmap.blit_x,
+ info->pixmap.blit_y);
+ 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 */
+ }
+ }
+
+ if (p->userfont)
+ charcnt = FNTCHARCNT(p->fontdata);
+
+ vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
+ 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);
+
+ ops = info->fbcon_par;
+ p->con_rotate = initial_rotation;
+ set_blitting_type(vc, info);
+
+ cols = vc->vc_cols;
+ rows = vc->vc_rows;
+ new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
+ new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+ new_cols /= vc->vc_font.width;
+ new_rows /= vc->vc_font.height;
+
+ /*
+ * 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) && vc->vc_mode == KD_TEXT) {
+ if (info->fbops->fb_set_par &&
+ !(ops->flags & FBCON_FLAGS_INIT)) {
+ ret = info->fbops->fb_set_par(info);
+
+ if (ret)
+ printk(KERN_ERR "fbcon_init: detected "
+ "unhandled fb_set_par error, "
+ "error code %d\n", ret);
+ }
+
+ 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;
+ } else
+ vc_resize(vc, new_cols, new_rows);
+
+ if (logo)
+ fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
+
+ if (vc == svc && softback_buf)
+ fbcon_update_softback(vc);
+
+ if (ops->rotate_font && ops->rotate_font(info, vc)) {
+ ops->rotate = FB_ROTATE_UR;
+ set_blitting_type(vc, info);
+ }
+
+ ops->p = &fb_display[fg_console];
+}
+
+static void fbcon_free_font(struct display *p, bool freefont)
+{
+ if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
+ kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
+ p->fontdata = NULL;
+ p->userfont = 0;
+}
+
+static void fbcon_deinit(struct vc_data *vc)
+{
+ struct display *p = &fb_display[vc->vc_num];
+ struct fb_info *info;
+ struct fbcon_ops *ops;
+ int idx;
+ bool free_font = true;
+
+ idx = con2fb_map[vc->vc_num];
+
+ if (idx == -1)
+ goto finished;
+
+ info = registered_fb[idx];
+
+ if (!info)
+ goto finished;
+
+ if (info->flags & FBINFO_MISC_FIRMWARE)
+ free_font = false;
+ ops = info->fbcon_par;
+
+ if (!ops)
+ goto finished;
+
+ if (CON_IS_VISIBLE(vc))
+ fbcon_del_cursor_timer(info);
+
+ ops->flags &= ~FBCON_FLAGS_INIT;
+finished:
+
+ fbcon_free_font(p, free_font);
+ if (free_font)
+ vc->vc_font.data = NULL;
+
+ if (!con_is_bound(&fb_con))
+ fbcon_exit();
+
+ return;
+}
+
+/* ====================================================================== */
+
+/* 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 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;
+
+ if (sy < vc->vc_top && vc->vc_top == logo_lines) {
+ vc->vc_top = 0;
+ /*
+ * If the font dimensions are not an integral of the display
+ * dimensions then the ops->clear below won't end up clearing
+ * the margins. Call clear_margins here in case the logo
+ * bitmap stretched into the margin area.
+ */
+ fbcon_clear_margins(vc, 0);
+ }
+
+ /* 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;
+ int y;
+ int c = scr_readw((u16 *) vc->vc_pos);
+
+ if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
+ return;
+
+ if (vc->vc_cursor_type & 0x10)
+ fbcon_del_cursor_timer(info);
+ else
+ fbcon_add_cursor_timer(info);
+
+ 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, mode, y, get_color(vc, info, c, 1),
+ get_color(vc, info, c, 0));
+}
+
+static int scrollback_phys_max = 0;
+static int scrollback_max = 0;
+static int scrollback_current = 0;
+
+static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
+ int unit)
+{
+ struct display *p, *t;
+ struct vc_data **default_mode, *vc;
+ struct vc_data *svc;
+ struct fbcon_ops *ops = info->fbcon_par;
+ int rows, cols, charcnt = 256;
+
+ p = &fb_display[unit];
+
+ if (var_to_display(p, var, info))
+ return;
+
+ vc = vc_cons[unit].d;
+
+ if (!vc)
+ return;
+
+ default_mode = vc->vc_display_fg;
+ svc = *default_mode;
+ 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;
+ var->yoffset = info->var.yoffset;
+ var->xoffset = info->var.xoffset;
+ fb_set_var(info, var);
+ ops->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 = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
+ rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+ cols /= vc->vc_font.width;
+ rows /= vc->vc_font.height;
+ vc_resize(vc, cols, rows);
+
+ if (CON_IS_VISIBLE(vc)) {
+ update_screen(vc);
+ if (softback_buf)
+ fbcon_update_softback(vc);
+ }
+}
+
+static __inline__ void ywrap_up(struct vc_data *vc, int count)
+{
+ 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];
+
+ p->yscroll += count;
+ if (p->yscroll >= p->vrows) /* Deal with wrap */
+ p->yscroll -= p->vrows;
+ ops->var.xoffset = 0;
+ ops->var.yoffset = p->yscroll * vc->vc_font.height;
+ ops->var.vmode |= FB_VMODE_YWRAP;
+ ops->update_start(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 fbcon_ops *ops = info->fbcon_par;
+ struct display *p = &fb_display[vc->vc_num];
+
+ p->yscroll -= count;
+ if (p->yscroll < 0) /* Deal with wrap */
+ p->yscroll += p->vrows;
+ ops->var.xoffset = 0;
+ ops->var.yoffset = p->yscroll * vc->vc_font.height;
+ ops->var.vmode |= FB_VMODE_YWRAP;
+ ops->update_start(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;
+ }
+
+ ops->var.xoffset = 0;
+ ops->var.yoffset = p->yscroll * vc->vc_font.height;
+ ops->var.vmode &= ~FB_VMODE_YWRAP;
+ ops->update_start(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 fbcon_ops *ops = info->fbcon_par;
+ struct display *p = &fb_display[vc->vc_num];
+
+ p->yscroll += count;
+
+ if (p->yscroll > p->vrows - vc->vc_rows) {
+ p->yscroll -= p->vrows - vc->vc_rows;
+ fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
+ }
+
+ ops->var.xoffset = 0;
+ ops->var.yoffset = p->yscroll * vc->vc_font.height;
+ ops->var.vmode &= ~FB_VMODE_YWRAP;
+ ops->update_start(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;
+ }
+
+ ops->var.xoffset = 0;
+ ops->var.yoffset = p->yscroll * vc->vc_font.height;
+ ops->var.vmode &= ~FB_VMODE_YWRAP;
+ ops->update_start(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 fbcon_ops *ops = info->fbcon_par;
+ struct display *p = &fb_display[vc->vc_num];
+
+ p->yscroll -= count;
+
+ if (p->yscroll < 0) {
+ p->yscroll += p->vrows - vc->vc_rows;
+ fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
+ }
+
+ ops->var.xoffset = 0;
+ ops->var.yoffset = p->yscroll * vc->vc_font.height;
+ ops->var.vmode &= ~FB_VMODE_YWRAP;
+ ops->update_start(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_blit(struct vc_data *vc, struct fb_info *info,
+ struct display *p, int line, int count, int ycount)
+{
+ int offset = ycount * vc->vc_cols;
+ unsigned short *d = (unsigned short *)
+ (vc->vc_origin + vc->vc_size_row * line);
+ unsigned short *s = d + offset;
+ struct fbcon_ops *ops = info->fbcon_par;
+
+ while (count--) {
+ unsigned short *start = s;
+ unsigned short *le = advance_row(s, 1);
+ unsigned short c;
+ int x = 0;
+
+ do {
+ c = scr_readw(s);
+
+ if (c == scr_readw(d)) {
+ if (s > start) {
+ ops->bmove(vc, info, line + ycount, x,
+ line, x, 1, s-start);
+ 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)
+ ops->bmove(vc, info, line + ycount, x, line, x, 1,
+ s-start);
+ console_conditional_schedule();
+ if (ycount > 0)
+ line++;
+ else {
+ line--;
+ /* NOTE: We subtract two lines from these pointers */
+ s -= vc->vc_size_row;
+ d -= vc->vc_size_row;
+ }
+ }
+}
+
+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];
+ 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:
+ fbcon_redraw_blit(vc, info, p, t, b - t - count,
+ count);
+ 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 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,
+ 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:
+ fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
+ -count);
+ 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;
+ 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 void updatescrollmode(struct display *p,
+ struct fb_info *info,
+ struct vc_data *vc)
+{
+ struct fbcon_ops *ops = info->fbcon_par;
+ int fh = vc->vc_font.height;
+ int cap = info->flags;
+ u16 t = 0;
+ int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
+ info->fix.xpanstep);
+ int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
+ int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+ int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
+ info->var.xres_virtual);
+ int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
+ divides(ypan, vc->vc_font.height) && vyres > yres;
+ int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
+ divides(ywrap, vc->vc_font.height) &&
+ divides(vc->vc_font.height, vyres) &&
+ divides(vc->vc_font.height, yres);
+ 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 = vyres/fh;
+ if (yres > (fh * (vc->vc_rows + 1)))
+ p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
+ if ((yres % fh) && (vyres % fh < 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, unsigned int user)
+{
+ 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];
+ struct fb_var_screeninfo var = info->var;
+ int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
+
+ virt_w = FBCON_SWAP(ops->rotate, width, height);
+ virt_h = FBCON_SWAP(ops->rotate, height, width);
+ virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
+ vc->vc_font.height);
+ virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
+ vc->vc_font.width);
+ var.xres = virt_w * virt_fw;
+ var.yres = virt_h * virt_fh;
+ x_diff = info->var.xres - var.xres;
+ y_diff = info->var.yres - var.yres;
+ if (x_diff < 0 || x_diff > virt_fw ||
+ y_diff < 0 || y_diff > virt_fh) {
+ const 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;
+ display_to_var(&var, p);
+ fb_videomode_to_var(&var, mode);
+
+ if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
+ return -EINVAL;
+
+ 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);
+ ops->var = info->var;
+ }
+ updatescrollmode(p, info, vc);
+ return 0;
+}
+
+static int fbcon_switch(struct vc_data *vc)
+{
+ struct fb_info *info, *old_info = NULL;
+ struct fbcon_ops *ops;
+ struct display *p = &fb_display[vc->vc_num];
+ struct fb_var_screeninfo var;
+ int i, ret, prev_console, charcnt = 256;
+
+ info = registered_fb[con2fb_map[vc->vc_num]];
+ ops = info->fbcon_par;
+
+ if (softback_top) {
+ if (softback_lines)
+ fbcon_set_origin(vc);
+ softback_top = softback_curr = softback_in = softback_buf;
+ softback_lines = 0;
+ fbcon_update_softback(vc);
+ }
+
+ 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 = ops->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 *o = registered_fb[i]->fbcon_par;
+
+ o->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;
+ var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
+ fb_set_var(info, &var);
+ ops->var = info->var;
+
+ if (old_info != NULL && (old_info != info ||
+ info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
+ if (info->fbops->fb_set_par) {
+ ret = info->fbops->fb_set_par(info);
+
+ if (ret)
+ printk(KERN_ERR "fbcon_switch: detected "
+ "unhandled fb_set_par error, "
+ "error code %d\n", ret);
+ }
+
+ if (old_info != info)
+ fbcon_del_cursor_timer(old_info);
+ }
+
+ if (fbcon_is_inactive(vc, info) ||
+ ops->blank_state != FB_BLANK_UNBLANK)
+ fbcon_del_cursor_timer(info);
+ else
+ fbcon_add_cursor_timer(info);
+
+ set_blitting_type(vc, info);
+ ops->cursor_reset = 1;
+
+ if (ops->rotate_font && ops->rotate_font(info, vc)) {
+ ops->rotate = FB_ROTATE_UR;
+ set_blitting_type(vc, info);
+ }
+
+ 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 (p->userfont)
+ charcnt = FNTCHARCNT(vc->vc_font.data);
+
+ if (charcnt > 256)
+ vc->vc_complement_mask <<= 1;
+
+ 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;
+
+ if (!fbcon_is_inactive(vc, info)) {
+ ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
+ ops->update_start(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, ops->rotate);
+ 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)
+{
+ struct fb_event event;
+
+ 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;
+ }
+
+
+ if (!lock_fb_info(info))
+ return;
+ event.info = info;
+ event.data = ␣
+ fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
+ unlock_fb_info(info);
+}
+
+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;
+ ops->var = info->var;
+ }
+ }
+
+ 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 (!(info->flags & FBINFO_MISC_USEREVENT))
+ if (fb_blank(info, blank))
+ fbcon_generic_blank(vc, info, blank);
+ }
+
+ if (!blank)
+ update_screen(vc);
+ }
+
+ if (mode_switch || fbcon_is_inactive(vc, info) ||
+ ops->blank_state != FB_BLANK_UNBLANK)
+ fbcon_del_cursor_timer(info);
+ else
+ fbcon_add_cursor_timer(info);
+
+ return 0;
+}
+
+static int fbcon_debug_enter(struct vc_data *vc)
+{
+ struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
+ struct fbcon_ops *ops = info->fbcon_par;
+
+ ops->save_graphics = ops->graphics;
+ ops->graphics = 0;
+ if (info->fbops->fb_debug_enter)
+ info->fbops->fb_debug_enter(info);
+ fbcon_set_palette(vc, color_table);
+ return 0;
+}
+
+static int fbcon_debug_leave(struct vc_data *vc)
+{
+ struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
+ struct fbcon_ops *ops = info->fbcon_par;
+
+ ops->graphics = ops->save_graphics;
+ if (info->fbops->fb_debug_leave)
+ info->fbops->fb_debug_leave(info);
+ return 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 fbcon_ops *ops = info->fbcon_par;
+ 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) {
+ int cols, rows;
+
+ cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
+ rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+ cols /= w;
+ rows /= h;
+ vc_resize(vc, cols, rows);
+ if (CON_IS_VISIBLE(vc) && softback_buf)
+ fbcon_update_softback(vc);
+ } 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)
+{
+ struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
+ 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;
+
+ /* Make sure drawing engine can handle the font */
+ if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
+ !(info->pixmap.blit_y & (1 << (font->height - 1))))
+ return -EINVAL;
+
+ /* Make sure driver can handle the font length */
+ if (fbcon_invalid_charcount(info, charcount))
+ 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 = first_fb_vc; i <= last_fb_vc; 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,
+ info->pixmap.blit_x, info->pixmap.blit_y);
+ 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 fbcon_ops *ops = info->fbcon_par;
+ struct display *disp = &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 = softback_curr = 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, disp, 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 = disp->yscroll - scrollback_current;
+ limit = disp->vrows;
+ switch (disp->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;
+
+ ops->var.xoffset = 0;
+ ops->var.yoffset = offset * vc->vc_font.height;
+ ops->update_start(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];
+ set_blitting_type(vc, info);
+
+ if (CON_IS_VISIBLE(vc)) {
+ var_to_display(p, &info->var, info);
+ cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
+ rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+ cols /= vc->vc_font.width;
+ rows /= vc->vc_font.height;
+ vc_resize(vc, cols, rows);
+ updatescrollmode(p, info, vc);
+ scrollback_max = 0;
+ scrollback_current = 0;
+
+ if (!fbcon_is_inactive(vc, info)) {
+ ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
+ ops->update_start(info);
+ }
+
+ fbcon_set_palette(vc, color_table);
+ update_screen(vc);
+ if (softback_buf)
+ fbcon_update_softback(vc);
+ }
+}
+
+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, fg = -1;
+
+ if (!ops || ops->currcon < 0)
+ return;
+
+ for (i = first_fb_vc; i <= last_fb_vc; i++) {
+ vc = vc_cons[i].d;
+ if (!vc || vc->vc_mode != KD_TEXT ||
+ registered_fb[con2fb_map[i]] != info)
+ continue;
+
+ if (CON_IS_VISIBLE(vc)) {
+ fg = i;
+ continue;
+ }
+
+ p = &fb_display[vc->vc_num];
+ set_blitting_type(vc, info);
+ var_to_display(p, &info->var, info);
+ cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
+ rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+ cols /= vc->vc_font.width;
+ rows /= vc->vc_font.height;
+ vc_resize(vc, cols, rows);
+ }
+
+ if (fg != -1)
+ fbcon_modechanged(info);
+}
+
+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;
+}
+
+#ifdef CONFIG_VT_HW_CONSOLE_BINDING
+static int fbcon_unbind(void)
+{
+ int ret;
+
+ ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
+ fbcon_is_default);
+
+ if (!ret)
+ fbcon_has_console_bind = 0;
+
+ return ret;
+}
+#else
+static inline int fbcon_unbind(void)
+{
+ return -EINVAL;
+}
+#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
+
+/* called with console_lock held */
+static int fbcon_fb_unbind(int idx)
+{
+ int i, new_idx = -1, ret = 0;
+
+ if (!fbcon_has_console_bind)
+ return 0;
+
+ for (i = first_fb_vc; i <= last_fb_vc; i++) {
+ if (con2fb_map[i] != idx &&
+ con2fb_map[i] != -1) {
+ new_idx = i;
+ break;
+ }
+ }
+
+ if (new_idx != -1) {
+ for (i = first_fb_vc; i <= last_fb_vc; i++) {
+ if (con2fb_map[i] == idx)
+ set_con2fb_map(i, new_idx, 0);
+ }
+ } else {
+ struct fb_info *info = registered_fb[idx];
+
+ /* This is sort of like set_con2fb_map, except it maps
+ * the consoles to no device and then releases the
+ * oldinfo to free memory and cancel the cursor blink
+ * timer. I can imagine this just becoming part of
+ * set_con2fb_map where new_idx is -1
+ */
+ for (i = first_fb_vc; i <= last_fb_vc; i++) {
+ if (con2fb_map[i] == idx) {
+ con2fb_map[i] = -1;
+ if (!search_fb_in_map(idx)) {
+ ret = con2fb_release_oldinfo(vc_cons[i].d,
+ info, NULL, i,
+ idx, 0);
+ if (ret) {
+ con2fb_map[i] = idx;
+ return ret;
+ }
+ }
+ }
+ }
+ ret = fbcon_unbind();
+ }
+
+ return ret;
+}
+
+/* called with console_lock held */
+static int fbcon_fb_unregistered(struct fb_info *info)
+{
+ int i, idx;
+
+ idx = info->node;
+ for (i = first_fb_vc; i <= last_fb_vc; i++) {
+ if (con2fb_map[i] == idx)
+ con2fb_map[i] = -1;
+ }
+
+ if (idx == info_idx) {
+ info_idx = -1;
+
+ for (i = 0; i < FB_MAX; i++) {
+ if (registered_fb[i] != NULL) {
+ info_idx = i;
+ break;
+ }
+ }
+ }
+
+ if (info_idx != -1) {
+ for (i = first_fb_vc; i <= last_fb_vc; i++) {
+ if (con2fb_map[i] == -1)
+ con2fb_map[i] = info_idx;
+ }
+ }
+
+ if (primary_device == idx)
+ primary_device = -1;
+
+ if (!num_registered_fb)
+ do_unregister_con_driver(&fb_con);
+
+ return 0;
+}
+
+/* called with console_lock held */
+static void fbcon_remap_all(int idx)
+{
+ int i;
+ for (i = first_fb_vc; i <= last_fb_vc; i++)
+ set_con2fb_map(i, idx, 0);
+
+ if (con_is_bound(&fb_con)) {
+ printk(KERN_INFO "fbcon: Remapping primary device, "
+ "fb%i, to tty %i-%i\n", idx,
+ first_fb_vc + 1, last_fb_vc + 1);
+ info_idx = idx;
+ }
+}
+
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
+static void fbcon_select_primary(struct fb_info *info)
+{
+ if (!map_override && primary_device == -1 &&
+ fb_is_primary_device(info)) {
+ int i;
+
+ printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
+ info->fix.id, info->node);
+ primary_device = info->node;
+
+ for (i = first_fb_vc; i <= last_fb_vc; i++)
+ con2fb_map_boot[i] = primary_device;
+
+ if (con_is_bound(&fb_con)) {
+ printk(KERN_INFO "fbcon: Remapping primary device, "
+ "fb%i, to tty %i-%i\n", info->node,
+ first_fb_vc + 1, last_fb_vc + 1);
+ info_idx = primary_device;
+ }
+ }
+
+}
+#else
+static inline void fbcon_select_primary(struct fb_info *info)
+{
+ return;
+}
+#endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
+
+/* called with console_lock held */
+static int fbcon_fb_registered(struct fb_info *info)
+{
+ int ret = 0, i, idx;
+
+ idx = info->node;
+ fbcon_select_primary(info);
+
+ if (info_idx == -1) {
+ for (i = first_fb_vc; i <= last_fb_vc; i++) {
+ if (con2fb_map_boot[i] == idx) {
+ info_idx = idx;
+ break;
+ }
+ }
+
+ if (info_idx != -1)
+ ret = do_fbcon_takeover(1);
+ } else {
+ for (i = first_fb_vc; i <= last_fb_vc; 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;
+ const struct fb_videomode *mode;
+
+ for (i = first_fb_vc; i <= last_fb_vc; 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(fb_display[i].mode,
+ &info->modelist);
+ fb_videomode_to_var(&var, mode);
+ fbcon_set_disp(info, &var, vc->vc_num);
+ }
+}
+
+static void fbcon_get_requirement(struct fb_info *info,
+ struct fb_blit_caps *caps)
+{
+ struct vc_data *vc;
+ struct display *p;
+
+ if (caps->flags) {
+ int i, charcnt;
+
+ for (i = first_fb_vc; i <= last_fb_vc; i++) {
+ vc = vc_cons[i].d;
+ if (vc && vc->vc_mode == KD_TEXT &&
+ info->node == con2fb_map[i]) {
+ p = &fb_display[i];
+ caps->x |= 1 << (vc->vc_font.width - 1);
+ caps->y |= 1 << (vc->vc_font.height - 1);
+ charcnt = (p->userfont) ?
+ FNTCHARCNT(p->fontdata) : 256;
+ if (caps->len < charcnt)
+ caps->len = charcnt;
+ }
+ }
+ } else {
+ vc = vc_cons[fg_console].d;
+
+ if (vc && vc->vc_mode == KD_TEXT &&
+ info->node == con2fb_map[fg_console]) {
+ p = &fb_display[fg_console];
+ caps->x = 1 << (vc->vc_font.width - 1);
+ caps->y = 1 << (vc->vc_font.height - 1);
+ caps->len = (p->userfont) ?
+ FNTCHARCNT(p->fontdata) : 256;
+ }
+ }
+}
+
+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;
+ struct fb_blit_caps *caps;
+ int idx, ret = 0;
+
+ /*
+ * ignore all events except driver registration and deregistration
+ * if fbcon is not active
+ */
+ if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
+ action == FB_EVENT_FB_UNREGISTERED))
+ goto done;
+
+ 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_UNBIND:
+ idx = info->node;
+ ret = fbcon_fb_unbind(idx);
+ break;
+ case FB_EVENT_FB_REGISTERED:
+ ret = fbcon_fb_registered(info);
+ break;
+ case FB_EVENT_FB_UNREGISTERED:
+ ret = fbcon_fb_unregistered(info);
+ break;
+ case FB_EVENT_SET_CONSOLE_MAP:
+ /* called with console lock held */
+ 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;
+ case FB_EVENT_GET_REQ:
+ caps = event->data;
+ fbcon_get_requirement(info, caps);
+ break;
+ case FB_EVENT_REMAP_ALL_CONSOLE:
+ idx = info->node;
+ fbcon_remap_all(idx);
+ break;
+ }
+done:
+ 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,
+ .con_debug_enter = fbcon_debug_enter,
+ .con_debug_leave = fbcon_debug_leave,
+};
+
+static struct notifier_block fbcon_event_notifier = {
+ .notifier_call = fbcon_event_notify,
+};
+
+static ssize_t store_rotate(struct device *device,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ struct fb_info *info;
+ int rotate, idx;
+ char **last = NULL;
+
+ if (fbcon_has_exited)
+ return count;
+
+ console_lock();
+ idx = con2fb_map[fg_console];
+
+ if (idx == -1 || registered_fb[idx] == NULL)
+ goto err;
+
+ info = registered_fb[idx];
+ rotate = simple_strtoul(buf, last, 0);
+ fbcon_rotate(info, rotate);
+err:
+ console_unlock();
+ return count;
+}
+
+static ssize_t store_rotate_all(struct device *device,
+ struct device_attribute *attr,const char *buf,
+ size_t count)
+{
+ struct fb_info *info;
+ int rotate, idx;
+ char **last = NULL;
+
+ if (fbcon_has_exited)
+ return count;
+
+ console_lock();
+ idx = con2fb_map[fg_console];
+
+ if (idx == -1 || registered_fb[idx] == NULL)
+ goto err;
+
+ info = registered_fb[idx];
+ rotate = simple_strtoul(buf, last, 0);
+ fbcon_rotate_all(info, rotate);
+err:
+ console_unlock();
+ return count;
+}
+
+static ssize_t show_rotate(struct device *device,
+ struct device_attribute *attr,char *buf)
+{
+ struct fb_info *info;
+ int rotate = 0, idx;
+
+ if (fbcon_has_exited)
+ return 0;
+
+ console_lock();
+ idx = con2fb_map[fg_console];
+
+ if (idx == -1 || registered_fb[idx] == NULL)
+ goto err;
+
+ info = registered_fb[idx];
+ rotate = fbcon_get_rotate(info);
+err:
+ console_unlock();
+ return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
+}
+
+static ssize_t show_cursor_blink(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *info;
+ struct fbcon_ops *ops;
+ int idx, blink = -1;
+
+ if (fbcon_has_exited)
+ return 0;
+
+ console_lock();
+ idx = con2fb_map[fg_console];
+
+ if (idx == -1 || registered_fb[idx] == NULL)
+ goto err;
+
+ info = registered_fb[idx];
+ ops = info->fbcon_par;
+
+ if (!ops)
+ goto err;
+
+ blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
+err:
+ console_unlock();
+ return snprintf(buf, PAGE_SIZE, "%d\n", blink);
+}
+
+static ssize_t store_cursor_blink(struct device *device,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fb_info *info;
+ int blink, idx;
+ char **last = NULL;
+
+ if (fbcon_has_exited)
+ return count;
+
+ console_lock();
+ idx = con2fb_map[fg_console];
+
+ if (idx == -1 || registered_fb[idx] == NULL)
+ goto err;
+
+ info = registered_fb[idx];
+
+ if (!info->fbcon_par)
+ goto err;
+
+ blink = simple_strtoul(buf, last, 0);
+
+ if (blink) {
+ fbcon_cursor_noblink = 0;
+ fbcon_add_cursor_timer(info);
+ } else {
+ fbcon_cursor_noblink = 1;
+ fbcon_del_cursor_timer(info);
+ }
+
+err:
+ console_unlock();
+ return count;
+}
+
+static struct device_attribute device_attrs[] = {
+ __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
+ __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
+ __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
+ store_cursor_blink),
+};
+
+static int fbcon_init_device(void)
+{
+ int i, error = 0;
+
+ fbcon_has_sysfs = 1;
+
+ for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
+ error = device_create_file(fbcon_device, &device_attrs[i]);
+
+ if (error)
+ break;
+ }
+
+ if (error) {
+ while (--i >= 0)
+ device_remove_file(fbcon_device, &device_attrs[i]);
+
+ fbcon_has_sysfs = 0;
+ }
+
+ return 0;
+}
+
+static void fbcon_start(void)
+{
+ if (num_registered_fb) {
+ int i;
+
+ console_lock();
+
+ for (i = 0; i < FB_MAX; i++) {
+ if (registered_fb[i] != NULL) {
+ info_idx = i;
+ break;
+ }
+ }
+
+ do_fbcon_takeover(0);
+ console_unlock();
+
+ }
+}
+
+static void fbcon_exit(void)
+{
+ struct fb_info *info;
+ int i, j, mapped;
+
+ if (fbcon_has_exited)
+ return;
+
+ kfree((void *)softback_buf);
+ softback_buf = 0UL;
+
+ for (i = 0; i < FB_MAX; i++) {
+ int pending = 0;
+
+ mapped = 0;
+ info = registered_fb[i];
+
+ if (info == NULL)
+ continue;
+
+ if (info->queue.func)
+ pending = cancel_work_sync(&info->queue);
+ DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
+ "no"));
+
+ for (j = first_fb_vc; j <= last_fb_vc; j++) {
+ if (con2fb_map[j] == i) {
+ mapped = 1;
+ break;
+ }
+ }
+
+ if (mapped) {
+ if (info->fbops->fb_release)
+ info->fbops->fb_release(info, 0);
+ module_put(info->fbops->owner);
+
+ if (info->fbcon_par) {
+ struct fbcon_ops *ops = info->fbcon_par;
+
+ fbcon_del_cursor_timer(info);
+ kfree(ops->cursor_src);
+ kfree(ops->cursor_state.mask);
+ kfree(info->fbcon_par);
+ info->fbcon_par = NULL;
+ }
+
+ if (info->queue.func == fb_flashcursor)
+ info->queue.func = NULL;
+ }
+ }
+
+ fbcon_has_exited = 1;
+}
+
+static int __init fb_console_init(void)
+{
+ int i;
+
+ console_lock();
+ fb_register_client(&fbcon_event_notifier);
+ fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
+ "fbcon");
+
+ if (IS_ERR(fbcon_device)) {
+ printk(KERN_WARNING "Unable to create device "
+ "for fbcon; errno = %ld\n",
+ PTR_ERR(fbcon_device));
+ fbcon_device = NULL;
+ } else
+ fbcon_init_device();
+
+ for (i = 0; i < MAX_NR_CONSOLES; i++)
+ con2fb_map[i] = -1;
+
+ console_unlock();
+ fbcon_start();
+ return 0;
+}
+
+fs_initcall(fb_console_init);
+
+#ifdef MODULE
+
+static void __exit fbcon_deinit_device(void)
+{
+ int i;
+
+ if (fbcon_has_sysfs) {
+ for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
+ device_remove_file(fbcon_device, &device_attrs[i]);
+
+ fbcon_has_sysfs = 0;
+ }
+}
+
+static void __exit fb_console_exit(void)
+{
+ console_lock();
+ fb_unregister_client(&fbcon_event_notifier);
+ fbcon_deinit_device();
+ device_destroy(fb_class, MKDEV(0, 0));
+ fbcon_exit();
+ do_unregister_con_driver(&fb_con);
+ console_unlock();
+}
+
+module_exit(fb_console_exit);
+
+#endif
+
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff