diff options
Diffstat (limited to 'drivers/video/fbdev/core/fbcon.c')
| -rw-r--r-- | drivers/video/fbdev/core/fbcon.c | 3672 |
1 files changed, 3672 insertions, 0 deletions
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c new file mode 100644 index 000000000000..04612f938bab --- /dev/null +++ b/drivers/video/fbdev/core/fbcon.c @@ -0,0 +1,3672 @@ +/* + * 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/fbcon.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 = -1; +static int fbcon_has_sysfs; +static int margin_color; + +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 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 void fbcon_set_palette(struct vc_data *vc, const unsigned char *table); + +/* + * 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 + ops->cur_blink_jiffies); +} + +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); + + setup_timer(&ops->cursor_timer, cursor_timer_handler, + (unsigned long) info); + mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies); + 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; + } + + if (!strncmp(options, "margin:", 7)) { + options += 7; + if (*options) + margin_color = simple_strtoul(options, &options, 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->fbops->owner) { + 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) { + ops->cur_blink_jiffies = HZ / 5; + 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; + ops->cur_blink_jiffies = HZ / 5; + info->fbcon_par = ops; + if (initial_rotation != -1) + p->con_rotate = initial_rotation; + else + p->con_rotate = fbcon_platform_get_rotate(info); + 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; + ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); + if (initial_rotation != -1) + p->con_rotate = initial_rotation; + else + p->con_rotate = fbcon_platform_get_rotate(info); + 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-&g |