hgafb.c
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上传日期:2013-04-10
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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:%dn", 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:%xn", 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:%xn", 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:%xn", 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:%dn", 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:%dn", 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:%dn", 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:%xn", 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:%xn", 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:%xn", 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 devicen",
- 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] = ' ';
- 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] = ' ';
- 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 */