| /* |
| * 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_INFO "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 */ |