LCOV - code coverage report
Current view: top level - drivers/video - hgafb.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 230 230 100.0 %
Date: 2017-01-25 Functions: 19 19 100.0 %

          Line data    Source code
       1             : /*
       2             :  * linux/drivers/video/hgafb.c -- Hercules graphics adaptor frame buffer device
       3             :  * 
       4             :  *      Created 25 Nov 1999 by Ferenc Bakonyi (fero@drama.obuda.kando.hu)
       5             :  *      Based on skeletonfb.c by Geert Uytterhoeven and
       6             :  *               mdacon.c by Andrew Apted
       7             :  *
       8             :  * History:
       9             :  *
      10             :  * - Revision 0.1.8 (23 Oct 2002): Ported to new framebuffer api.
      11             :  * 
      12             :  * - Revision 0.1.7 (23 Jan 2001): fix crash resulting from MDA only cards 
      13             :  *                                 being detected as Hercules.   (Paul G.)
      14             :  * - Revision 0.1.6 (17 Aug 2000): new style structs
      15             :  *                                 documentation
      16             :  * - Revision 0.1.5 (13 Mar 2000): spinlocks instead of saveflags();cli();etc
      17             :  *                                 minor fixes
      18             :  * - Revision 0.1.4 (24 Jan 2000): fixed a bug in hga_card_detect() for 
      19             :  *                                  HGA-only systems
      20             :  * - Revision 0.1.3 (22 Jan 2000): modified for the new fb_info structure
      21             :  *                                 screen is cleared after rmmod
      22             :  *                                 virtual resolutions
      23             :  *                                 module parameter 'nologo={0|1}'
      24             :  *                                 the most important: boot logo :)
      25             :  * - Revision 0.1.0  (6 Dec 1999): faster scrolling and minor fixes
      26             :  * - First release  (25 Nov 1999)
      27             :  *
      28             :  * This file is subject to the terms and conditions of the GNU General Public
      29             :  * License.  See the file COPYING in the main directory of this archive
      30             :  * for more details.
      31             :  */
      32             : 
      33             : #include <linux/module.h>
      34             : #include <linux/kernel.h>
      35             : #include <linux/errno.h>
      36             : #include <linux/spinlock.h>
      37             : #include <linux/string.h>
      38             : #include <linux/mm.h>
      39             : #include <linux/slab.h>
      40             : #include <linux/delay.h>
      41             : #include <linux/fb.h>
      42             : #include <linux/init.h>
      43             : #include <linux/ioport.h>
      44             : #include <linux/platform_device.h>
      45             : #include <asm/io.h>
      46             : #include <asm/vga.h>
      47             : 
      48             : #if 0
      49             : #define DPRINTK(args...) printk(KERN_DEBUG __FILE__": " ##args)
      50             : #else
      51             : #define DPRINTK(args...)
      52             : #endif
      53             : 
      54             : #if 0
      55             : #define CHKINFO(ret) if (info != &fb_info) { printk(KERN_DEBUG __FILE__": This should never happen, line:%d \n", __LINE__); return ret; }
      56             : #else
      57             : #define CHKINFO(ret)
      58             : #endif
      59             : 
      60             : /* Description of the hardware layout */
      61             : 
      62           1 : static void __iomem *hga_vram;                  /* Base of video memory */
      63           1 : static unsigned long hga_vram_len;              /* Size of video memory */
      64             : 
      65             : #define HGA_ROWADDR(row) ((row%4)*8192 + (row>>2)*90)
      66             : #define HGA_TXT                 0
      67             : #define HGA_GFX                 1
      68             : 
      69             : static inline u8 __iomem * rowaddr(struct fb_info *info, u_int row)
      70             : {
      71             :         return info->screen_base + HGA_ROWADDR(row);
      72             : }
      73             : 
      74           1 : static int hga_mode = -1;                       /* 0 = txt, 1 = gfx mode */
      75           1 : 
      76           1 : static enum { TYPE_HERC, TYPE_HERCPLUS, TYPE_HERCCOLOR } hga_type;
      77           1 : static char *hga_type_name;
      78             : 
      79             : #define HGA_INDEX_PORT          0x3b4           /* Register select port */
      80             : #define HGA_VALUE_PORT          0x3b5           /* Register value port */
      81             : #define HGA_MODE_PORT           0x3b8           /* Mode control port */
      82             : #define HGA_STATUS_PORT         0x3ba           /* Status and Config port */
      83             : #define HGA_GFX_PORT            0x3bf           /* Graphics control port */
      84             : 
      85             : /* HGA register values */
      86             : 
      87             : #define HGA_CURSOR_BLINKING     0x00
      88             : #define HGA_CURSOR_OFF          0x20
      89             : #define HGA_CURSOR_SLOWBLINK    0x60
      90             : 
      91             : #define HGA_MODE_GRAPHICS       0x02
      92             : #define HGA_MODE_VIDEO_EN       0x08
      93             : #define HGA_MODE_BLINK_EN       0x20
      94             : #define HGA_MODE_GFX_PAGE1      0x80
      95             : 
      96             : #define HGA_STATUS_HSYNC        0x01
      97             : #define HGA_STATUS_VSYNC        0x80
      98             : #define HGA_STATUS_VIDEO        0x08
      99             : 
     100             : #define HGA_CONFIG_COL132       0x08
     101             : #define HGA_GFX_MODE_EN         0x01
     102             : #define HGA_GFX_PAGE_EN         0x02
     103             : 
     104             : /* Global locks */
     105             : 
     106           1 : static DEFINE_SPINLOCK(hga_reg_lock);
     107             : 
     108             : /* Framebuffer driver structures */
     109             : 
     110           1 : static struct fb_var_screeninfo __initdata hga_default_var = {
     111             :         .xres           = 720,
     112             :         .yres           = 348,
     113             :         .xres_virtual   = 720,
     114             :         .yres_virtual   = 348,
     115             :         .bits_per_pixel = 1,
     116             :         .red            = {0, 1, 0},
     117             :         .green          = {0, 1, 0},
     118             :         .blue           = {0, 1, 0},
     119             :         .transp         = {0, 0, 0},
     120             :         .height         = -1,
     121             :         .width          = -1,
     122             : };
     123             : 
     124           1 : static struct fb_fix_screeninfo __initdata hga_fix = {
     125             :         .id             = "HGA",
     126             :         .type           = FB_TYPE_PACKED_PIXELS,        /* (not sure) */
     127             :         .visual         = FB_VISUAL_MONO10,
     128             :         .xpanstep       = 8,
     129             :         .ypanstep       = 8,
     130             :         .line_length    = 90,
     131             :         .accel          = FB_ACCEL_NONE
     132             : };
     133             : 
     134             : /* Don't assume that tty1 will be the initial current console. */
     135           1 : static int release_io_port = 0;
     136           1 : static int release_io_ports = 0;
     137           1 : static int nologo = 0;
     138             : 
     139             : /* -------------------------------------------------------------------------
     140             :  *
     141             :  * Low level hardware functions
     142             :  *
     143             :  * ------------------------------------------------------------------------- */
     144             : 
     145             : static void write_hga_b(unsigned int val, unsigned char reg)
     146             : {
     147          72 :         outb_p(reg, HGA_INDEX_PORT); 
     148          72 :         outb_p(val, HGA_VALUE_PORT);
     149          36 : }
     150             : 
     151             : static void write_hga_w(unsigned int val, unsigned char reg)
     152             : {
     153          28 :         outb_p(reg,   HGA_INDEX_PORT); outb_p(val >> 8,   HGA_VALUE_PORT);
     154          28 :         outb_p(reg+1, HGA_INDEX_PORT); outb_p(val & 0xff, HGA_VALUE_PORT);
     155           7 : }
     156             : 
     157             : static int test_hga_b(unsigned char val, unsigned char reg)
     158             : {
     159           6 :         outb_p(reg, HGA_INDEX_PORT); 
     160           4 :         outb  (val, HGA_VALUE_PORT);
     161           8 :         udelay(20); val = (inb_p(HGA_VALUE_PORT) == val);
     162           2 :         return val;
     163             : }
     164             : 
     165             : static void hga_clear_screen(void)
     166             : {
     167           6 :         unsigned char fillchar = 0xbf; /* magic */
     168           3 :         unsigned long flags;
     169           3 : 
     170           9 :         spin_lock_irqsave(&hga_reg_lock, flags);
     171           6 :         if (hga_mode == HGA_TXT)
     172           3 :                 fillchar = ' ';
     173           6 :         else if (hga_mode == HGA_GFX)
     174           3 :                 fillchar = 0x00;
     175           6 :         spin_unlock_irqrestore(&hga_reg_lock, flags);
     176           6 :         if (fillchar != 0xbf)
     177           3 :                 memset_io(hga_vram, fillchar, hga_vram_len);
     178           3 : }
     179             : 
     180             : static void hga_txt_mode(void)
     181             : {
     182           2 :         unsigned long flags;
     183           2 : 
     184           6 :         spin_lock_irqsave(&hga_reg_lock, flags);
     185           4 :         outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_BLINK_EN, HGA_MODE_PORT);
     186           4 :         outb_p(0x00, HGA_GFX_PORT);
     187           4 :         outb_p(0x00, HGA_STATUS_PORT);
     188             : 
     189           4 :         write_hga_b(0x61, 0x00);        /* horizontal total */
     190           4 :         write_hga_b(0x50, 0x01);        /* horizontal displayed */
     191           4 :         write_hga_b(0x52, 0x02);        /* horizontal sync pos */
     192           4 :         write_hga_b(0x0f, 0x03);        /* horizontal sync width */
     193             : 
     194           4 :         write_hga_b(0x19, 0x04);        /* vertical total */
     195           4 :         write_hga_b(0x06, 0x05);        /* vertical total adjust */
     196           4 :         write_hga_b(0x19, 0x06);        /* vertical displayed */
     197           4 :         write_hga_b(0x19, 0x07);        /* vertical sync pos */
     198             : 
     199           4 :         write_hga_b(0x02, 0x08);        /* interlace mode */
     200           4 :         write_hga_b(0x0d, 0x09);        /* maximum scanline */
     201           4 :         write_hga_b(0x0c, 0x0a);        /* cursor start */
     202           4 :         write_hga_b(0x0d, 0x0b);        /* cursor end */
     203             : 
     204           4 :         write_hga_w(0x0000, 0x0c);      /* start address */
     205           4 :         write_hga_w(0x0000, 0x0e);      /* cursor location */
     206             : 
     207           2 :         hga_mode = HGA_TXT;
     208           4 :         spin_unlock_irqrestore(&hga_reg_lock, flags);
     209           2 : }
     210             : 
     211             : static void hga_gfx_mode(void)
     212             : {
     213           1 :         unsigned long flags;
     214           1 : 
     215           3 :         spin_lock_irqsave(&hga_reg_lock, flags);
     216           2 :         outb_p(0x00, HGA_STATUS_PORT);
     217           2 :         outb_p(HGA_GFX_MODE_EN, HGA_GFX_PORT);
     218           2 :         outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_GRAPHICS, HGA_MODE_PORT);
     219             : 
     220           2 :         write_hga_b(0x35, 0x00);        /* horizontal total */
     221           2 :         write_hga_b(0x2d, 0x01);        /* horizontal displayed */
     222           2 :         write_hga_b(0x2e, 0x02);        /* horizontal sync pos */
     223           2 :         write_hga_b(0x07, 0x03);        /* horizontal sync width */
     224             : 
     225           2 :         write_hga_b(0x5b, 0x04);        /* vertical total */
     226           2 :         write_hga_b(0x02, 0x05);        /* vertical total adjust */
     227           2 :         write_hga_b(0x57, 0x06);        /* vertical displayed */
     228           2 :         write_hga_b(0x57, 0x07);        /* vertical sync pos */
     229             : 
     230           2 :         write_hga_b(0x02, 0x08);        /* interlace mode */
     231           2 :         write_hga_b(0x03, 0x09);        /* maximum scanline */
     232           2 :         write_hga_b(0x00, 0x0a);        /* cursor start */
     233           2 :         write_hga_b(0x00, 0x0b);        /* cursor end */
     234             : 
     235           2 :         write_hga_w(0x0000, 0x0c);      /* start address */
     236           2 :         write_hga_w(0x0000, 0x0e);      /* cursor location */
     237             : 
     238           1 :         hga_mode = HGA_GFX;
     239           2 :         spin_unlock_irqrestore(&hga_reg_lock, flags);
     240           1 : }
     241             : 
     242             : static void hga_show_logo(struct fb_info *info)
     243             : {
     244           1 : /*
     245             :         void __iomem *dest = hga_vram;
     246             :         char *logo = linux_logo_bw;
     247             :         int x, y;
     248             :         
     249             :         for (y = 134; y < 134 + 80 ; y++) * this needs some cleanup *
     250             :                 for (x = 0; x < 10 ; x++)
     251             :                         writeb(~*(logo++),(dest + HGA_ROWADDR(y) + x + 40));
     252             : */
     253             : }
     254             : 
     255             : static void hga_pan(unsigned int xoffset, unsigned int yoffset)
     256             : {
     257           1 :         unsigned int base;
     258           1 :         unsigned long flags;
     259           1 :         
     260           1 :         base = (yoffset / 8) * 90 + xoffset;
     261           3 :         spin_lock_irqsave(&hga_reg_lock, flags);
     262           2 :         write_hga_w(base, 0x0c);        /* start address */
     263           2 :         spin_unlock_irqrestore(&hga_reg_lock, flags);
     264           1 :         DPRINTK("hga_pan: base:%d\n", base);
     265             : }
     266             : 
     267             : static void hga_blank(int blank_mode)
     268             : {
     269           1 :         unsigned long flags;
     270           1 : 
     271           3 :         spin_lock_irqsave(&hga_reg_lock, flags);
     272           2 :         if (blank_mode) {
     273           2 :                 outb_p(0x00, HGA_MODE_PORT);    /* disable video */
     274             :         } else {
     275           2 :                 outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_GRAPHICS, HGA_MODE_PORT);
     276             :         }
     277           4 :         spin_unlock_irqrestore(&hga_reg_lock, flags);
     278           1 : }
     279             : 
     280             : static int __init hga_card_detect(void)
     281             : {
     282           2 :         int count = 0;
     283           1 :         void __iomem *p, *q;
     284           1 :         unsigned short p_save, q_save;
     285           1 : 
     286           2 :         hga_vram_len  = 0x08000;
     287           1 : 
     288           3 :         hga_vram = ioremap(0xb0000, hga_vram_len);
     289           1 : 
     290           4 :         if (request_region(0x3b0, 12, "hgafb"))
     291           2 :                 release_io_ports = 1;
     292           4 :         if (request_region(0x3bf, 1, "hgafb"))
     293           2 :                 release_io_port = 1;
     294           1 : 
     295           1 :         /* do a memory check */
     296             : 
     297           1 :         p = hga_vram;
     298           1 :         q = hga_vram + 0x01000;
     299             : 
     300           4 :         p_save = readw(p); q_save = readw(q);
     301             : 
     302           7 :         writew(0xaa55, p); if (readw(p) == 0xaa55) count++;
     303           7 :         writew(0x55aa, p); if (readw(p) == 0x55aa) count++;
     304           2 :         writew(p_save, p);
     305             : 
     306           2 :         if (count != 2)
     307           1 :                 goto error;
     308             : 
     309             :         /* Ok, there is definitely a card registering at the correct
     310             :          * memory location, so now we do an I/O port test.
     311             :          */
     312             :         
     313           4 :         if (!test_hga_b(0x66, 0x0f))        /* cursor low register */
     314           1 :                 goto error;
     315             : 
     316           4 :         if (!test_hga_b(0x99, 0x0f))     /* cursor low register */
     317           1 :                 goto error;
     318             : 
     319             :         /* See if the card is a Hercules, by checking whether the vsync
     320             :          * bit of the status register is changing.  This test lasts for
     321             :          * approximately 1/10th of a second.
     322             :          */
     323             :         
     324           4 :         p_save = q_save = inb_p(HGA_STATUS_PORT) & HGA_STATUS_VSYNC;
     325             : 
     326           7 :         for (count=0; count < 50000 && p_save == q_save; count++) {
     327           4 :                 q_save = inb(HGA_STATUS_PORT) & HGA_STATUS_VSYNC;
     328           3 :                 udelay(2);
     329             :         }
     330             : 
     331           2 :         if (p_save == q_save) 
     332           1 :                 goto error;
     333             : 
     334           2 :         switch (inb_p(HGA_STATUS_PORT) & 0x70) {
     335           3 :                 case 0x10:
     336           1 :                         hga_type = TYPE_HERCPLUS;
     337           1 :                         hga_type_name = "HerculesPlus";
     338           1 :                         break;
     339           4 :                 case 0x50:
     340           1 :                         hga_type = TYPE_HERCCOLOR;
     341           1 :                         hga_type_name = "HerculesColor";
     342           1 :                         break;
     343           2 :                 default:
     344           2 :                         hga_type = TYPE_HERC;
     345           1 :                         hga_type_name = "Hercules";
     346           1 :                         break;
     347             :         }
     348           1 :         return 1;
     349           4 : error:
     350           8 :         if (release_io_ports)
     351           4 :                 release_region(0x3b0, 12);
     352           8 :         if (release_io_port)
     353           4 :                 release_region(0x3bf, 1);
     354           4 :         return 0;
     355             : }
     356             : 
     357             : /**
     358             :  *      hgafb_open - open the framebuffer device
     359             :  *      @info:pointer to fb_info object containing info for current hga board
     360             :  *      @int:open by console system or userland.
     361             :  */
     362             : 
     363             : static int hgafb_open(struct fb_info *info, int init)
     364             : {
     365           2 :         hga_gfx_mode();
     366           2 :         hga_clear_screen();
     367           4 :         if (!nologo) hga_show_logo(info);
     368           2 :         return 0;
     369             : }
     370             : 
     371             : /**
     372             :  *      hgafb_open - open the framebuffer device
     373             :  *      @info:pointer to fb_info object containing info for current hga board
     374             :  *      @int:open by console system or userland.
     375             :  */
     376             : 
     377             : static int hgafb_release(struct fb_info *info, int init)
     378             : {
     379           2 :         hga_txt_mode();
     380           2 :         hga_clear_screen();
     381           1 :         return 0;
     382             : }
     383             : 
     384             : /**
     385             :  *      hgafb_setcolreg - set color registers
     386             :  *      @regno:register index to set
     387             :  *      @red:red value, unused
     388             :  *      @green:green value, unused
     389             :  *      @blue:blue value, unused
     390             :  *      @transp:transparency value, unused
     391             :  *      @info:unused
     392             :  *
     393             :  *      This callback function is used to set the color registers of a HGA
     394             :  *      board. Since we have only two fixed colors only @regno is checked.
     395             :  *      A zero is returned on success and 1 for failure.
     396             :  */
     397             : 
     398             : static int hgafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
     399             :                            u_int transp, struct fb_info *info)
     400             : {
     401           2 :         if (regno > 1)
     402           1 :                 return 1;
     403           1 :         return 0;
     404             : }
     405             : 
     406             : /**
     407             :  *      hga_pan_display - pan or wrap the display
     408             :  *      @var:contains new xoffset, yoffset and vmode values
     409             :  *      @info:pointer to fb_info object containing info for current hga board
     410             :  *
     411             :  *      This function looks only at xoffset, yoffset and the %FB_VMODE_YWRAP
     412             :  *      flag in @var. If input parameters are correct it calls hga_pan() to 
     413             :  *      program the hardware. @info->var is updated to the new values.
     414             :  *      A zero is returned on success and %-EINVAL for failure.
     415             :  */
     416             : 
     417             : static int hgafb_pan_display(struct fb_var_screeninfo *var,
     418             :                              struct fb_info *info)
     419             : {
     420           2 :         if (var->vmode & FB_VMODE_YWRAP) {
     421           4 :                 if (var->yoffset < 0 || 
     422             :                     var->yoffset >= info->var.yres_virtual ||
     423             :                     var->xoffset)
     424           1 :                         return -EINVAL;
     425             :         } else {
     426           6 :                 if (var->xoffset + var->xres > info->var.xres_virtual
     427             :                  || var->yoffset + var->yres > info->var.yres_virtual
     428             :                  || var->yoffset % 8)
     429           1 :                         return -EINVAL;
     430             :         }
     431             : 
     432           2 :         hga_pan(var->xoffset, var->yoffset);
     433           1 :         return 0;
     434             : }
     435             : 
     436             : /**
     437             :  *      hgafb_blank - (un)blank the screen
     438             :  *      @blank_mode:blanking method to use
     439             :  *      @info:unused
     440             :  *      
     441             :  *      Blank the screen if blank_mode != 0, else unblank. 
     442             :  *      Implements VESA suspend and powerdown modes on hardware that supports 
     443             :  *      disabling hsync/vsync:
     444             :  *              @blank_mode == 2 means suspend vsync,
     445             :  *              @blank_mode == 3 means suspend hsync,
     446             :  *              @blank_mode == 4 means powerdown.
     447             :  */
     448             : 
     449             : static int hgafb_blank(int blank_mode, struct fb_info *info)
     450             : {
     451           2 :         hga_blank(blank_mode);
     452           1 :         return 0;
     453             : }
     454             : 
     455             : /*
     456             :  * Accel functions
     457             :  */
     458             : #ifdef CONFIG_FB_HGA_ACCEL
     459             : static void hgafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
     460             : {
     461             :         u_int rows, y;
     462             :         u8 __iomem *dest;
     463             : 
     464             :         y = rect->dy;
     465             : 
     466             :         for (rows = rect->height; rows--; y++) {
     467             :                 dest = rowaddr(info, y) + (rect->dx >> 3);
     468             :                 switch (rect->rop) {
     469             :                 case ROP_COPY:
     470             :                         //fb_memset(dest, rect->color, (rect->width >> 3));
     471             :                         break;
     472             :                 case ROP_XOR:
     473             :                         fb_writeb(~(fb_readb(dest)), dest);
     474             :                         break;
     475             :                 }
     476             :         }
     477             : }
     478             : 
     479             : static void hgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
     480             : {
     481             :         u_int rows, y1, y2;
     482             :         u8 __iomem *src;
     483             :         u8 __iomem *dest;
     484             : 
     485             :         if (area->dy <= area->sy) {
     486             :                 y1 = area->sy;
     487             :                 y2 = area->dy;
     488             : 
     489             :                 for (rows = area->height; rows--; ) {
     490             :                         src = rowaddr(info, y1) + (area->sx >> 3);
     491             :                         dest = rowaddr(info, y2) + (area->dx >> 3);
     492             :                         //fb_memmove(dest, src, (area->width >> 3));
     493             :                         y1++;
     494             :                         y2++;
     495             :                 }
     496             :         } else {
     497             :                 y1 = area->sy + area->height - 1;
     498             :                 y2 = area->dy + area->height - 1;
     499             : 
     500             :                 for (rows = area->height; rows--;) {
     501             :                         src = rowaddr(info, y1) + (area->sx >> 3);
     502             :                         dest = rowaddr(info, y2) + (area->dx >> 3);
     503             :                         //fb_memmove(dest, src, (area->width >> 3));
     504             :                         y1--;
     505             :                         y2--;
     506             :                 }
     507             :         }
     508             : }
     509             : 
     510             : static void hgafb_imageblit(struct fb_info *info, const struct fb_image *image)
     511             : {
     512             :         u8 __iomem *dest;
     513             :         u8 *cdat = (u8 *) image->data;
     514             :         u_int rows, y = image->dy;
     515             :         u8 d;
     516             : 
     517             :         for (rows = image->height; rows--; y++) {
     518             :                 d = *cdat++;
     519             :                 dest = rowaddr(info, y) + (image->dx >> 3);
     520             :                 fb_writeb(d, dest);
     521             :         }
     522             : }
     523             : #else /* !CONFIG_FB_HGA_ACCEL */
     524             : #define hgafb_fillrect cfb_fillrect
     525             : #define hgafb_copyarea cfb_copyarea
     526             : #define hgafb_imageblit cfb_imageblit
     527             : #endif /* CONFIG_FB_HGA_ACCEL */
     528             : 
     529             : 
     530           1 : static struct fb_ops hgafb_ops = {
     531             :         .owner          = THIS_MODULE,
     532             :         .fb_open        = hgafb_open,
     533             :         .fb_release     = hgafb_release,
     534             :         .fb_setcolreg   = hgafb_setcolreg,
     535             :         .fb_pan_display = hgafb_pan_display,
     536             :         .fb_blank       = hgafb_blank,
     537             :         .fb_fillrect    = hgafb_fillrect,
     538             :         .fb_copyarea    = hgafb_copyarea,
     539             :         .fb_imageblit   = hgafb_imageblit,
     540             : };
     541             :                 
     542             : /* ------------------------------------------------------------------------- *
     543             :  *
     544             :  * Functions in fb_info
     545             :  * 
     546             :  * ------------------------------------------------------------------------- */
     547             : 
     548             : /* ------------------------------------------------------------------------- */
     549             :     
     550             :         /*
     551             :          *  Initialization
     552             :          */
     553             : 
     554             : static int __init hgafb_probe(struct platform_device *pdev)
     555             : {
     556           1 :         struct fb_info *info;
     557           1 : 
     558           9 :         if (! hga_card_detect()) {
     559           1 :                 printk(KERN_INFO "hgafb: HGA card not detected.\n");
     560           2 :                 if (hga_vram)
     561           1 :                         iounmap(hga_vram);
     562           1 :                 return -EINVAL;
     563             :         }
     564             : 
     565           1 :         printk(KERN_INFO "hgafb: %s with %ldK of memory detected.\n",
     566             :                 hga_type_name, hga_vram_len/1024);
     567             : 
     568           1 :         info = framebuffer_alloc(0, &pdev->dev);
     569           2 :         if (!info) {
     570           1 :                 iounmap(hga_vram);
     571           1 :                 return -ENOMEM;
     572             :         }
     573             : 
     574           1 :         hga_fix.smem_start = (unsigned long)hga_vram;
     575           1 :         hga_fix.smem_len = hga_vram_len;
     576             : 
     577           1 :         info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
     578           1 :         info->var = hga_default_var;
     579           1 :         info->fix = hga_fix;
     580           1 :         info->monspecs.hfmin = 0;
     581           1 :         info->monspecs.hfmax = 0;
     582           1 :         info->monspecs.vfmin = 10000;
     583           1 :         info->monspecs.vfmax = 10000;
     584           1 :         info->monspecs.dpms = 0;
     585           1 :         info->fbops = &hgafb_ops;
     586           1 :         info->screen_base = hga_vram;
     587             : 
     588           4 :         if (register_framebuffer(info) < 0) {
     589           1 :                 framebuffer_release(info);
     590           1 :                 iounmap(hga_vram);
     591           1 :                 return -EINVAL;
     592             :         }
     593             : 
     594           1 :         printk(KERN_INFO "fb%d: %s frame buffer device\n",
     595             :                info->node, info->fix.id);
     596           1 :         platform_set_drvdata(pdev, info);
     597           1 :         return 0;
     598             : }
     599             : 
     600             : static int hgafb_remove(struct platform_device *pdev)
     601             : {
     602           4 :         struct fb_info *info = platform_get_drvdata(pdev);
     603           1 : 
     604           2 :         hga_txt_mode();
     605           2 :         hga_clear_screen();
     606             : 
     607           2 :         if (info) {
     608           2 :                 unregister_framebuffer(info);
     609           1 :                 framebuffer_release(info);
     610             :         }
     611             : 
     612           2 :         iounmap(hga_vram);
     613             : 
     614           4 :         if (release_io_ports)
     615           2 :                 release_region(0x3b0, 12);
     616             : 
     617           4 :         if (release_io_port)
     618           2 :                 release_region(0x3bf, 1);
     619             : 
     620           2 :         return 0;
     621             : }
     622             : 
     623           1 : static struct platform_driver hgafb_driver = {
     624             :         .probe = hgafb_probe,
     625             :         .remove = hgafb_remove,
     626             :         .driver = {
     627             :                 .name = "hgafb",
     628             :         },
     629             : };
     630             : 
     631           1 : static struct platform_device *hgafb_device;
     632             : 
     633             : static int __init hgafb_init(void)
     634             : {
     635           1 :         int ret;
     636           1 : 
     637           4 :         if (fb_get_options("hgafb", NULL))
     638           2 :                 return -ENODEV;
     639             : 
     640           2 :         ret = platform_driver_register(&hgafb_driver);
     641             : 
     642           2 :         if (!ret) {
     643           1 :                 hgafb_device = platform_device_register_simple("hgafb", 0, NULL, 0);
     644             : 
     645           4 :                 if (IS_ERR(hgafb_device)) {
     646           2 :                         platform_driver_unregister(&hgafb_driver);
     647           3 :                         ret = PTR_ERR(hgafb_device);
     648             :                 }
     649             :         }
     650             : 
     651           3 :         return ret;
     652             : }
     653             : 
     654             : static void __exit hgafb_exit(void)
     655             : {
     656           2 :         platform_device_unregister(hgafb_device);
     657           4 :         platform_driver_unregister(&hgafb_driver);
     658           2 : }
     659             : 
     660             : /* -------------------------------------------------------------------------
     661             :  *
     662             :  *  Modularization
     663             :  *
     664             :  * ------------------------------------------------------------------------- */
     665             : 
     666             : MODULE_AUTHOR("Ferenc Bakonyi (fero@drama.obuda.kando.hu)");
     667             : MODULE_DESCRIPTION("FBDev driver for Hercules Graphics Adaptor");
     668             : MODULE_LICENSE("GPL");
     669             : 
     670             : module_param(nologo, bool, 0);
     671             : MODULE_PARM_DESC(nologo, "Disables startup logo if != 0 (default=0)");
     672             : module_init(hgafb_init);
     673             : module_exit(hgafb_exit);

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