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/*
* linux/drivers/video/hgafb.c -- Hercules graphics adaptor frame buffer device
*
* Created 25 Nov 1999 by Ferenc Bakonyi (fero@drama.obuda.kando.hu)
* Based on skeletonfb.c by Geert Uytterhoeven and
* mdacon.c by Andrew Apted
*
* History:
*
* - Revision 0.1.7 (23 Jan 2001): fix crash resulting from MDA only cards
* being detected as Hercules. (Paul G.)
* - Revision 0.1.6 (17 Aug 2000): new style structs
* documentation
* - Revision 0.1.5 (13 Mar 2000): spinlocks instead of saveflags();cli();etc
* minor fixes
* - Revision 0.1.4 (24 Jan 2000): fixed a bug in hga_card_detect() for
* HGA-only systems
* - Revision 0.1.3 (22 Jan 2000): modified for the new fb_info structure
* screen is cleared after rmmod
* virtual resolutions
* kernel parameter 'video=hga:font:{fontname}'
* module parameter 'font={fontname}'
* module parameter 'nologo={0|1}'
* the most important: boot logo :)
* - Revision 0.1.0 (6 Dec 1999): faster scrolling and minor fixes
* - First release (25 Nov 1999)
*
* 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.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <asm/io.h>
#include <asm/vga.h>
#include <video/fbcon.h>
#include <video/fbcon-hga.h>
#ifdef MODULE
#define INCLUDE_LINUX_LOGO_DATA
#include <linux/linux_logo.h>
#endif /* MODULE */
#if 0
#define DPRINTK(args...) printk(KERN_DEBUG __FILE__": " ##args)
#else
#define DPRINTK(args...)
#endif
#if 0
#define CHKINFO(ret) if (info != &fb_info) { printk(KERN_DEBUG __FILE__": This should never happen, line:%d \n", __LINE__); return ret; }
#else
#define CHKINFO(ret)
#endif
/* Description of the hardware layout */
static unsigned long hga_vram_base; /* Base of video memory */
static unsigned long hga_vram_len; /* Size of video memory */
#define HGA_TXT 0
#define HGA_GFX 1
static int hga_mode = -1; /* 0 = txt, 1 = gfx mode */
static enum { TYPE_HERC, TYPE_HERCPLUS, TYPE_HERCCOLOR } hga_type;
static char *hga_type_name;
#define HGA_INDEX_PORT 0x3b4 /* Register select port */
#define HGA_VALUE_PORT 0x3b5 /* Register value port */
#define HGA_MODE_PORT 0x3b8 /* Mode control port */
#define HGA_STATUS_PORT 0x3ba /* Status and Config port */
#define HGA_GFX_PORT 0x3bf /* Graphics control port */
/* HGA register values */
#define HGA_CURSOR_BLINKING 0x00
#define HGA_CURSOR_OFF 0x20
#define HGA_CURSOR_SLOWBLINK 0x60
#define HGA_MODE_GRAPHICS 0x02
#define HGA_MODE_VIDEO_EN 0x08
#define HGA_MODE_BLINK_EN 0x20
#define HGA_MODE_GFX_PAGE1 0x80
#define HGA_STATUS_HSYNC 0x01
#define HGA_STATUS_VSYNC 0x80
#define HGA_STATUS_VIDEO 0x08
#define HGA_CONFIG_COL132 0x08
#define HGA_GFX_MODE_EN 0x01
#define HGA_GFX_PAGE_EN 0x02
/* Global locks */
static spinlock_t hga_reg_lock = SPIN_LOCK_UNLOCKED;
/* Framebuffer driver structures */
static struct fb_var_screeninfo hga_default_var = {
xres: 720,
yres: 348,
xres_virtual: 720,
yres_virtual: 348,
xoffset: 0,
yoffset: 0,
bits_per_pixel: 1,
grayscale: 0,
red: {0, 1, 0},
green: {0, 1, 0},
blue: {0, 1, 0},
transp: {0, 0, 0},
nonstd: 0, /* (FB_NONSTD_HGA ?) */
activate: 0,
height: -1,
width: -1,
accel_flags: 0,
/* pixclock */
/* left_margin, right_margin */
/* upper_margin, lower_margin */
/* hsync_len, vsync_len */
/* sync */
/* vmode */
};
static struct fb_fix_screeninfo hga_fix = {
id: "HGA",
smem_start: (unsigned long) NULL,
smem_len: 0,
type: FB_TYPE_PACKED_PIXELS, /* (not sure) */
type_aux: 0, /* (not sure) */
visual: FB_VISUAL_MONO10,
xpanstep: 8,
ypanstep: 8,
ywrapstep: 0,
line_length: 90,
mmio_start: 0,
mmio_len: 0,
accel: FB_ACCEL_NONE
};
static struct fb_info fb_info;
static struct display disp;
/* Don't assume that tty1 will be the initial current console. */
static int currcon = -1;
static int release_io_port = 0;
static int release_io_ports = 0;
#ifdef MODULE
static char *font = NULL;
static int nologo = 0;
#endif
/* -------------------------------------------------------------------------
*
* Low level hardware functions
*
* ------------------------------------------------------------------------- */
static void write_hga_b(unsigned int val, unsigned char reg)
{
outb_p(reg, HGA_INDEX_PORT);
outb_p(val, HGA_VALUE_PORT);
}
static void write_hga_w(unsigned int val, unsigned char reg)
{
outb_p(reg, HGA_INDEX_PORT); outb_p(val >> 8, HGA_VALUE_PORT);
outb_p(reg+1, HGA_INDEX_PORT); outb_p(val & 0xff, HGA_VALUE_PORT);
}
static int test_hga_b(unsigned char val, unsigned char reg)
{
outb_p(reg, HGA_INDEX_PORT);
outb (val, HGA_VALUE_PORT);
udelay(20); val = (inb_p(HGA_VALUE_PORT) == val);
return val;
}
static void hga_clear_screen(void)
{
unsigned char fillchar = 0xbf; /* magic */
unsigned long flags;
spin_lock_irqsave(&hga_reg_lock, flags);
if (hga_mode == HGA_TXT)
fillchar = ' ';
else if (hga_mode == HGA_GFX)
fillchar = 0x00;
spin_unlock_irqrestore(&hga_reg_lock, flags);
if (fillchar != 0xbf)
isa_memset_io(hga_vram_base, fillchar, hga_vram_len);
}
#ifdef MODULE
static void hga_txt_mode(void)
{
unsigned long flags;
spin_lock_irqsave(&hga_reg_lock, flags);
outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_BLINK_EN, HGA_MODE_PORT);
outb_p(0x00, HGA_GFX_PORT);
outb_p(0x00, HGA_STATUS_PORT);
write_hga_b(0x61, 0x00); /* horizontal total */
write_hga_b(0x50, 0x01); /* horizontal displayed */
write_hga_b(0x52, 0x02); /* horizontal sync pos */
write_hga_b(0x0f, 0x03); /* horizontal sync width */
write_hga_b(0x19, 0x04); /* vertical total */
write_hga_b(0x06, 0x05); /* vertical total adjust */
write_hga_b(0x19, 0x06); /* vertical displayed */
write_hga_b(0x19, 0x07); /* vertical sync pos */
write_hga_b(0x02, 0x08); /* interlace mode */
write_hga_b(0x0d, 0x09); /* maximum scanline */
write_hga_b(0x0c, 0x0a); /* cursor start */
write_hga_b(0x0d, 0x0b); /* cursor end */
write_hga_w(0x0000, 0x0c); /* start address */
write_hga_w(0x0000, 0x0e); /* cursor location */
hga_mode = HGA_TXT;
spin_unlock_irqrestore(&hga_reg_lock, flags);
}
#endif /* MODULE */
static void hga_gfx_mode(void)
{
unsigned long flags;
spin_lock_irqsave(&hga_reg_lock, flags);
outb_p(0x00, HGA_STATUS_PORT);
outb_p(HGA_GFX_MODE_EN, HGA_GFX_PORT);
outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_GRAPHICS, HGA_MODE_PORT);
write_hga_b(0x35, 0x00); /* horizontal total */
write_hga_b(0x2d, 0x01); /* horizontal displayed */
write_hga_b(0x2e, 0x02); /* horizontal sync pos */
write_hga_b(0x07, 0x03); /* horizontal sync width */
write_hga_b(0x5b, 0x04); /* vertical total */
write_hga_b(0x02, 0x05); /* vertical total adjust */
write_hga_b(0x57, 0x06); /* vertical displayed */
write_hga_b(0x57, 0x07); /* vertical sync pos */
write_hga_b(0x02, 0x08); /* interlace mode */
write_hga_b(0x03, 0x09); /* maximum scanline */
write_hga_b(0x00, 0x0a); /* cursor start */
write_hga_b(0x00, 0x0b); /* cursor end */
write_hga_w(0x0000, 0x0c); /* start address */
write_hga_w(0x0000, 0x0e); /* cursor location */
hga_mode = HGA_GFX;
spin_unlock_irqrestore(&hga_reg_lock, flags);
}
#ifdef MODULE
static void hga_show_logo(void)
{
int x, y;
unsigned long dest = hga_vram_base;
char *logo = linux_logo_bw;
for (y = 134; y < 134 + 80 ; y++) /* this needs some cleanup */
for (x = 0; x < 10 ; x++)
isa_writeb(~*(logo++),
(dest + (y%4)*8192 + (y>>2)*90 + x + 40));
}
#endif /* MODULE */
static void hga_pan(unsigned int xoffset, unsigned int yoffset)
{
unsigned int base;
unsigned long flags;
base = (yoffset / 8) * 90 + xoffset;
spin_lock_irqsave(&hga_reg_lock, flags);
write_hga_w(base, 0x0c); /* start address */
spin_unlock_irqrestore(&hga_reg_lock, flags);
DPRINTK("hga_pan: base:%d\n", base);
}
static void hga_blank(int blank_mode)
{
unsigned long flags;
spin_lock_irqsave(&hga_reg_lock, flags);
if (blank_mode) {
outb_p(0x00, HGA_MODE_PORT); /* disable video */
} else {
outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_GRAPHICS, HGA_MODE_PORT);
}
spin_unlock_irqrestore(&hga_reg_lock, flags);
}
static int __init hga_card_detect(void)
{
int count=0;
unsigned long p, q;
unsigned short p_save, q_save;
hga_vram_base = 0xb0000;
hga_vram_len = 0x08000;
if (request_region(0x3b0, 12, "hgafb"))
release_io_ports = 1;
if (request_region(0x3bf, 1, "hgafb"))
release_io_port = 1;
/* do a memory check */
p = hga_vram_base;
q = hga_vram_base + 0x01000;
p_save = isa_readw(p); q_save = isa_readw(q);
isa_writew(0xaa55, p); if (isa_readw(p) == 0xaa55) count++;
isa_writew(0x55aa, p); if (isa_readw(p) == 0x55aa) count++;
isa_writew(p_save, p);
if (count != 2) {
return 0;
}
/* Ok, there is definitely a card registering at the correct
* memory location, so now we do an I/O port test.
*/
if (!test_hga_b(0x66, 0x0f)) { /* cursor low register */
return 0;
}
if (!test_hga_b(0x99, 0x0f)) { /* cursor low register */
return 0;
}
/* See if the card is a Hercules, by checking whether the vsync
* bit of the status register is changing. This test lasts for
* approximately 1/10th of a second.
*/
p_save = q_save = inb_p(HGA_STATUS_PORT) & HGA_STATUS_VSYNC;
for (count=0; count < 50000 && p_save == q_save; count++) {
q_save = inb(HGA_STATUS_PORT) & HGA_STATUS_VSYNC;
udelay(2);
}
if (p_save == q_save)
return 0;
switch (inb_p(HGA_STATUS_PORT) & 0x70) {
case 0x10:
hga_type = TYPE_HERCPLUS;
hga_type_name = "HerculesPlus";
break;
case 0x50:
hga_type = TYPE_HERCCOLOR;
hga_type_name = "HerculesColor";
break;
default:
hga_type = TYPE_HERC;
hga_type_name = "Hercules";
break;
}
return 1;
}
/* ------------------------------------------------------------------------- *
*
* dispsw functions
*
* ------------------------------------------------------------------------- */
/**
* hga_get_fix - get the fixed part of the display
* @fix:struct fb_fix_screeninfo to fill in
* @con:unused
* @info:pointer to fb_info object containing info for current hga board
*
* This wrapper function copies @info->fix to @fix.
* A zero is returned on success and %-EINVAL for failure.
*/
int hga_get_fix(struct fb_fix_screeninfo *fix, int con, struct fb_info *info)
{
CHKINFO(-EINVAL);
DPRINTK("hga_get_fix: con:%d, info:%x, fb_info:%x\n", con, (unsigned)info, (unsigned)&fb_info);
*fix = info->fix;
return 0;
}
/**
* hga_get_var - get the user defined part of the display
* @var:struct fb_var_screeninfo to fill in
* @con:unused
* @info:pointer to fb_info object containing info for current hga board
*
* This wrapper function copies @info->var to @var.
* A zero is returned on success and %-EINVAL for failure.
*/
int hga_get_var(struct fb_var_screeninfo *var, int con, struct fb_info *info)
{
CHKINFO(-EINVAL);
DPRINTK("hga_get_var: con:%d, info:%x, fb_info:%x\n", con, (unsigned)info, (unsigned)&fb_info);
*var = info->var;
return 0;
}
/**
* hga_set_var - set the user defined part of the display
* @var:new video mode
* @con:unused
* @info:pointer to fb_info object containing info for current hga board
*
* This function is called for changing video modes. Since HGA cards have
* only one fixed mode we have not much to do. After checking input
* parameters @var is copied to @info->var and @info->changevar is called.
* A zero is returned on success and %-EINVAL for failure.
*
* FIXME:
* This is the most mystical function (at least for me).
* What is the exact specification of xxx_set_var()?
* Should it handle xoffset, yoffset? Should it do panning?
* What does vmode mean?
*/
int hga_set_var(struct fb_var_screeninfo *var, int con, struct fb_info *info)
{
CHKINFO(-EINVAL);
DPRINTK("hga_set_var: con:%d, activate:%x, info:0x%x, fb_info:%x\n", con, var->activate, (unsigned)info, (unsigned)&fb_info);
if (var->xres != 720 || var->yres != 348 ||
var->xres_virtual != 720 ||
var->yres_virtual < 348 || var->yres_virtual > 348 + 16 ||
var->bits_per_pixel != 1 || var->grayscale != 0) {
return -EINVAL;
}
if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
info->var = *var;
if (info->changevar)
(*info->changevar)(con);
}
return 0;
}
/**
* hga_getcolreg - read color registers
* @regno:register index to read out
* @red:red value
* @green:green value
* @blue:blue value
* @transp:transparency value
* @info:unused
*
* This callback function is used to read the color registers of a HGA
* board. Since we have only two fixed colors, RGB values are 0x0000
* for register0 and 0xaaaa for register1.
* A zero is returned on success and 1 for failure.
*/
static int hga_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
u_int *transp, struct fb_info *info)
{
if (regno == 0) {
*red = *green = *blue = 0x0000;
*transp = 0;
} else if (regno == 1) {
*red = *green = *blue = 0xaaaa;
*transp = 0;
} else
return 1;
return 0;
}
/**
* hga_get_cmap - get the colormap
* @cmap:struct fb_cmap to fill in
* @kspc:called from kernel space?
* @con:unused
* @info:pointer to fb_info object containing info for current hga board
*
* This wrapper function passes it's input parameters to fb_get_cmap().
* Callback function hga_getcolreg() is used to read the color registers.
*/
int hga_get_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info)
{
CHKINFO(-EINVAL);
DPRINTK("hga_get_cmap: con:%d\n", con);
return fb_get_cmap(cmap, kspc, hga_getcolreg, info);
}
/**
* hga_setcolreg - set color registers
* @regno:register index to set
* @red:red value, unused
* @green:green value, unused
* @blue:blue value, unused
* @transp:transparency value, unused
* @info:unused
*
* This callback function is used to set the color registers of a HGA
* board. Since we have only two fixed colors only @regno is checked.
* A zero is returned on success and 1 for failure.
*/
static int hga_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info)
{
if (regno > 1)
return 1;
return 0;
}
/**
* hga_set_cmap - set the colormap
* @cmap:struct fb_cmap to set
* @kspc:called from kernel space?
* @con:unused
* @info:pointer to fb_info object containing info for current hga board
*
* This wrapper function passes it's input parameters to fb_set_cmap().
* Callback function hga_setcolreg() is used to set the color registers.
*/
int hga_set_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info)
{
CHKINFO(-EINVAL);
DPRINTK("hga_set_cmap: con:%d\n", con);
return fb_set_cmap(cmap, kspc, hga_setcolreg, info);
}
/**
* hga_pan_display - pan or wrap the display
* @var:contains new xoffset, yoffset and vmode values
* @con:unused
* @info:pointer to fb_info object containing info for current hga board
*
* This function looks only at xoffset, yoffset and the %FB_VMODE_YWRAP
* flag in @var. If input parameters are correct it calls hga_pan() to
* program the hardware. @info->var is updated to the new values.
* A zero is returned on success and %-EINVAL for failure.
*/
int hga_pan_display(struct fb_var_screeninfo *var, int con,
struct fb_info *info)
{
CHKINFO(-EINVAL);
DPRINTK("pan_disp: con:%d, wrap:%d, xoff:%d, yoff:%d\n", con, var->vmode & FB_VMODE_YWRAP, var->xoffset, var->yoffset);
if (var->vmode & FB_VMODE_YWRAP) {
if (var->yoffset < 0 ||
var->yoffset >= info->var.yres_virtual ||
var->xoffset)
return -EINVAL;
} else {
if (var->xoffset + var->xres > info->var.xres_virtual
|| var->yoffset + var->yres > info->var.yres_virtual
|| var->yoffset % 8)
return -EINVAL;
}
hga_pan(var->xoffset, var->yoffset);
info->var.xoffset = var->xoffset;
info->var.yoffset = var->yoffset;
if (var->vmode & FB_VMODE_YWRAP)
info->var.vmode |= FB_VMODE_YWRAP;
else
info->var.vmode &= ~FB_VMODE_YWRAP;
return 0;
}
static struct fb_ops hgafb_ops = {
owner: THIS_MODULE,
fb_get_fix: hga_get_fix,
fb_get_var: hga_get_var,
fb_set_var: hga_set_var,
fb_get_cmap: hga_get_cmap,
fb_set_cmap: hga_set_cmap,
fb_pan_display: hga_pan_display,
};
/* ------------------------------------------------------------------------- *
*
* Functions in fb_info
*
* ------------------------------------------------------------------------- */
/**
* hgafbcon_switch - switch console
* @con:new console to switch to
* @info:pointer to fb_info object containing info for current hga board
*
* This function should install a new colormap and change the video mode.
* Since we have fixed colors and only one video mode we have nothing to
* do.
* Only console administration is done but it should go to fbcon.c IMHO.
* A zero is returned on success and %-EINVAL for failure.
*/
static int hgafbcon_switch(int con, struct fb_info *info)
{
CHKINFO(-EINVAL);
DPRINTK("hgafbcon_switch: currcon:%d, con:%d, info:%x, fb_info:%x\n", currcon, con, (unsigned)info, (unsigned)&fb_info);
/* Save the colormap and video mode */
#if 0 /* Not necessary in hgafb, we use fixed colormap */
fb_copy_cmap(&info->cmap, &fb_display[currcon].cmap, 0);
#endif
if (currcon != -1) /* this check is absolute necessary! */
memcpy(&fb_display[currcon].var, &info->var,
sizeof(struct fb_var_screeninfo));
/* Install a new colormap and change the video mode. By default fbcon
* sets all the colormaps and video modes to the default values at
* bootup.
*/
#if 0
fb_copy_cmap(&fb_display[con].cmap, &info->cmap, 0);
fb_set_cmap(&info->cmap, 1, hga_setcolreg, info);
#endif
memcpy(&info->var, &fb_display[con].var,
sizeof(struct fb_var_screeninfo));
/* hga_set_var(&info->var, con, &fb_info); is it necessary? */
currcon = con;
/* Hack to work correctly with XF86_Mono */
hga_gfx_mode();
return 0;
}
/**
* hgafbcon_updatevar - update the user defined part of the display
* @con:console to update or -1 when no consoles defined on this fb
* @info:pointer to fb_info object containing info for current hga board
*
* This function is called when @var is changed by fbcon.c without calling
* hga_set_var(). It usually means scrolling. hga_pan_display() is called
* to update the hardware and @info->var.
* A zero is returned on success and %-EINVAL for failure.
*/
static int hgafbcon_updatevar(int con, struct fb_info *info)
{
CHKINFO(-EINVAL);
DPRINTK("hga_update_var: con:%d, info:%x, fb_info:%x\n", con, (unsigned)info, (unsigned)&fb_info);
return (con < 0) ? -EINVAL : hga_pan_display(&fb_display[con].var, con, info);
}
/**
* hgafbcon_blank - (un)blank the screen
* @blank_mode:blanking method to use
* @info:unused
*
* Blank the screen if blank_mode != 0, else unblank.
* Implements VESA suspend and powerdown modes on hardware that supports
* disabling hsync/vsync:
* @blank_mode == 2 means suspend vsync,
* @blank_mode == 3 means suspend hsync,
* @blank_mode == 4 means powerdown.
*/
static void hgafbcon_blank(int blank_mode, struct fb_info *info)
{
CHKINFO( );
DPRINTK("hga_blank: blank_mode:%d, info:%x, fb_info:%x\n", blank_mode, (unsigned)info, (unsigned)&fb_info);
hga_blank(blank_mode);
}
/* ------------------------------------------------------------------------- */
/*
* Initialization
*/
int __init hgafb_init(void)
{
if (! hga_card_detect()) {
printk(KERN_ERR "hgafb: HGA card not detected.\n");
return -EINVAL;
}
printk(KERN_INFO "hgafb: %s with %ldK of memory detected.\n",
hga_type_name, hga_vram_len/1024);
hga_gfx_mode();
hga_clear_screen();
#ifdef MODULE
if (!nologo) hga_show_logo();
#endif /* MODULE */
hga_fix.smem_start = VGA_MAP_MEM(hga_vram_base);
hga_fix.smem_len = hga_vram_len;
disp.var = hga_default_var;
/* disp.cmap = ???; */
disp.screen_base = (char*)hga_fix.smem_start;
disp.visual = hga_fix.visual;
disp.type = hga_fix.type;
disp.type_aux = hga_fix.type_aux;
disp.ypanstep = hga_fix.ypanstep;
disp.ywrapstep = hga_fix.ywrapstep;
disp.line_length = hga_fix.line_length;
disp.can_soft_blank = 1;
disp.inverse = 0;
#ifdef FBCON_HAS_HGA
disp.dispsw = &fbcon_hga;
#else
#warning HGAFB will not work as a console!
disp.dispsw = &fbcon_dummy;
#endif
disp.dispsw_data = NULL;
disp.scrollmode = SCROLL_YREDRAW;
strcpy (fb_info.modename, hga_fix.id);
fb_info.node = -1;
fb_info.flags = FBINFO_FLAG_DEFAULT;
/* fb_info.open = ??? */
fb_info.var = hga_default_var;
fb_info.fix = hga_fix;
fb_info.monspecs.hfmin = 0;
fb_info.monspecs.hfmax = 0;
fb_info.monspecs.vfmin = 10000;
fb_info.monspecs.vfmax = 10000;
fb_info.monspecs.dpms = 0;
fb_info.fbops = &hgafb_ops;
fb_info.screen_base = (char *)hga_fix.smem_start;
fb_info.disp = &disp;
/* fb_info.display_fg = ??? */
/* fb_info.fontname initialized later */
fb_info.changevar = NULL;
fb_info.switch_con = hgafbcon_switch;
fb_info.updatevar = hgafbcon_updatevar;
fb_info.blank = hgafbcon_blank;
fb_info.pseudo_palette = NULL; /* ??? */
fb_info.par = NULL;
if (register_framebuffer(&fb_info) < 0)
return -EINVAL;
printk(KERN_INFO "fb%d: %s frame buffer device\n",
GET_FB_IDX(fb_info.node), fb_info.modename);
return 0;
}
/*
* Setup
*/
#ifndef MODULE
int __init hgafb_setup(char *options)
{
/*
* Parse user speficied options
* `video=hga:font:VGA8x16' or
* `video=hga:font:SUN8x16' recommended
* Other supported fonts: VGA8x8, Acorn8x8, PEARL8x8
* More different fonts can be used with the `setfont' utility.
*/
char *this_opt;
fb_info.fontname[0] = '\0';
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ","))) {
if (!strncmp(this_opt, "font:", 5))
strcpy(fb_info.fontname, this_opt+5);
}
return 0;
}
#endif /* !MODULE */
/*
* Cleanup
*/
#ifdef MODULE
static void hgafb_cleanup(struct fb_info *info)
{
hga_txt_mode();
hga_clear_screen();
unregister_framebuffer(info);
if (release_io_ports) release_region(0x3b0, 12);
if (release_io_port) release_region(0x3bf, 1);
}
#endif /* MODULE */
/* -------------------------------------------------------------------------
*
* Modularization
*
* ------------------------------------------------------------------------- */
#ifdef MODULE
int init_module(void)
{
if (font)
strncpy(fb_info.fontname, font, sizeof(fb_info.fontname)-1);
else
fb_info.fontname[0] = '\0';
return hgafb_init();
}
void cleanup_module(void)
{
hgafb_cleanup(&fb_info);
}
MODULE_AUTHOR("Ferenc Bakonyi (fero@drama.obuda.kando.hu)");
MODULE_DESCRIPTION("FBDev driver for Hercules Graphics Adaptor");
MODULE_LICENSE("GPL");
MODULE_PARM(font, "s");
MODULE_PARM_DESC(font, "Specifies one of the compiled-in fonts (VGA8x8, VGA8x16, SUN8x16, Acorn8x8, PEARL8x8) (default=none)");
MODULE_PARM(nologo, "i");
MODULE_PARM_DESC(nologo, "Disables startup logo if != 0 (default=0)");
#endif /* MODULE */
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