1 files changed, 619 insertions, 0 deletions

diff --git a/drivers/video/hgafb.c b/drivers/video/hgafb.c
new file mode 100644
index 000000000000..b37cea7d1094
--- /dev/null
+++ b/drivers/video/hgafb.c
@@ -0,0 +1,619 @@
+/*
+ * 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 0.1.8 (23 Oct 2002): Ported to new framebuffer api.
+ * 
+ * - 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
+ *                                 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>
+
+#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 void __iomem *hga_vram;                  /* Base of video memory */
+static unsigned long hga_vram_len;              /* Size of video memory */
+
+#define HGA_ROWADDR(row) ((row%4)*8192 + (row>>2)*90)
+#define HGA_TXT                 0
+#define HGA_GFX                 1
+
+static inline u8 __iomem * rowaddr(struct fb_info *info, u_int row)
+{
+        return info->screen_base + HGA_ROWADDR(row);
+}
+
+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 DEFINE_SPINLOCK(hga_reg_lock);
+
+/* Framebuffer driver structures */
+
+static struct fb_var_screeninfo hga_default_var = {
+        .xres           = 720,
+        .yres           = 348,
+        .xres_virtual   = 720,
+        .yres_virtual   = 348,
+        .bits_per_pixel = 1,
+        .red            = {0, 1, 0},
+        .green          = {0, 1, 0},
+        .blue           = {0, 1, 0},
+        .transp         = {0, 0, 0},
+        .height         = -1,
+        .width          = -1,
+};
+
+static struct fb_fix_screeninfo hga_fix = {
+        .id             = "HGA",
+        .type           = FB_TYPE_PACKED_PIXELS,        /* (not sure) */
+        .visual         = FB_VISUAL_MONO10,
+        .xpanstep       = 8,
+        .ypanstep       = 8,
+        .line_length    = 90,
+        .accel          = FB_ACCEL_NONE
+};
+
+static struct fb_info fb_info;
+
+/* Don't assume that tty1 will be the initial current console. */
+static int release_io_port = 0;
+static int release_io_ports = 0;
+static int nologo = 0;
+
+/* -------------------------------------------------------------------------
+ *
+ * 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)
+                memset_io(hga_vram, fillchar, hga_vram_len);
+}
+
+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);
+}
+
+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);
+}
+
+static void hga_show_logo(struct fb_info *info)
+{
+/*
+        void __iomem *dest = hga_vram;
+        char *logo = linux_logo_bw;
+        int x, y;
+        
+        for (y = 134; y < 134 + 80 ; y++) * this needs some cleanup *
+                for (x = 0; x < 10 ; x++)
+                        writeb(~*(logo++),(dest + HGA_ROWADDR(y) + x + 40));
+*/
+}
+
+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;
+        void __iomem *p, *q;
+        unsigned short p_save, q_save;
+
+        hga_vram_len  = 0x08000;
+
+        hga_vram = ioremap(0xb0000, hga_vram_len);
+
+        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;
+        q = hga_vram + 0x01000;
+
+        p_save = readw(p); q_save = readw(q);
+
+        writew(0xaa55, p); if (readw(p) == 0xaa55) count++;
+        writew(0x55aa, p); if (readw(p) == 0x55aa) count++;
+        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;
+}
+
+/**
+ *      hgafb_open - open the framebuffer device
+ *      @info:pointer to fb_info object containing info for current hga board
+ *      @int:open by console system or userland.
+ */
+
+static int hgafb_open(struct fb_info *info, int init)
+{
+        hga_gfx_mode();
+        hga_clear_screen();
+        if (!nologo) hga_show_logo(info);
+        return 0;
+}
+
+/**
+ *      hgafb_open - open the framebuffer device
+ *      @info:pointer to fb_info object containing info for current hga board
+ *      @int:open by console system or userland.
+ */
+
+static int hgafb_release(struct fb_info *info, int init)
+{
+        hga_txt_mode();
+        hga_clear_screen();
+        return 0;
+}
+
+/**
+ *      hgafb_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 hgafb_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_pan_display - pan or wrap the display
+ *      @var:contains new xoffset, yoffset and vmode values
+ *      @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.
+ */
+
+static int hgafb_pan_display(struct fb_var_screeninfo *var,
+                             struct fb_info *info)
+{
+        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);
+        return 0;
+}
+
+/**
+ *      hgafb_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 int hgafb_blank(int blank_mode, struct fb_info *info)
+{
+        hga_blank(blank_mode);
+        return 0;
+}
+
+/*
+ * Accel functions
+ */
+#ifdef CONFIG_FB_HGA_ACCEL
+static void hgafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+        u_int rows, y;
+        u8 __iomem *dest;
+
+        y = rect->dy;
+
+        for (rows = rect->height; rows--; y++) {
+                dest = rowaddr(info, y) + (rect->dx >> 3);
+                switch (rect->rop) {
+                case ROP_COPY:
+                        //fb_memset(dest, rect->color, (rect->width >> 3));
+                        break;
+                case ROP_XOR:
+                        fb_writeb(~(fb_readb(dest)), dest);
+                        break;
+                }
+        }
+}
+
+static void hgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
+{
+        u_int rows, y1, y2;
+        u8 __iomem *src;
+        u8 __iomem *dest;
+
+        if (area->dy <= area->sy) {
+                y1 = area->sy;
+                y2 = area->dy;
+
+                for (rows = area->height; rows--; ) {
+                        src = rowaddr(info, y1) + (area->sx >> 3);
+                        dest = rowaddr(info, y2) + (area->dx >> 3);
+                        //fb_memmove(dest, src, (area->width >> 3));
+                        y1++;
+                        y2++;
+                }
+        } else {
+                y1 = area->sy + area->height - 1;
+                y2 = area->dy + area->height - 1;
+
+                for (rows = area->height; rows--;) {
+                        src = rowaddr(info, y1) + (area->sx >> 3);
+                        dest = rowaddr(info, y2) + (area->dx >> 3);
+                        //fb_memmove(dest, src, (area->width >> 3));
+                        y1--;
+                        y2--;
+                }
+        }
+}
+
+static void hgafb_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+        u8 __iomem *dest;
+        u8 *cdat = (u8 *) image->data;
+        u_int rows, y = image->dy;
+        u8 d;
+
+        for (rows = image->height; rows--; y++) {
+                d = *cdat++;
+                dest = rowaddr(info, y) + (image->dx >> 3);
+                fb_writeb(d, dest);
+        }
+}
+#else /* !CONFIG_FB_HGA_ACCEL */
+#define hgafb_fillrect cfb_fillrect
+#define hgafb_copyarea cfb_copyarea
+#define hgafb_imageblit cfb_imageblit
+#endif /* CONFIG_FB_HGA_ACCEL */
+
+
+static struct fb_ops hgafb_ops = {
+        .owner          = THIS_MODULE,
+        .fb_open        = hgafb_open,
+        .fb_release     = hgafb_release,
+        .fb_setcolreg   = hgafb_setcolreg,
+        .fb_pan_display = hgafb_pan_display,
+        .fb_blank       = hgafb_blank,
+        .fb_fillrect    = hgafb_fillrect,
+        .fb_copyarea    = hgafb_copyarea,
+        .fb_imageblit   = hgafb_imageblit,
+};
+                
+/* ------------------------------------------------------------------------- *
+ *
+ * Functions in fb_info
+ * 
+ * ------------------------------------------------------------------------- */
+
+/* ------------------------------------------------------------------------- */
+    
+        /*
+         *  Initialization
+         */
+
+static int __init hgafb_init(void)
+{
+        if (fb_get_options("hgafb", NULL))
+                return -ENODEV;
+
+        if (! hga_card_detect()) {
+                printk(KERN_INFO "hgafb: HGA card not detected.\n");
+                if (hga_vram)
+                        iounmap(hga_vram);
+                return -EINVAL;
+        }
+
+        printk(KERN_INFO "hgafb: %s with %ldK of memory detected.\n",
+                hga_type_name, hga_vram_len/1024);
+
+        hga_fix.smem_start = (unsigned long)hga_vram;
+        hga_fix.smem_len = hga_vram_len;
+
+        fb_info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
+        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 = hga_vram;
+
+        if (register_framebuffer(&fb_info) < 0) {
+                iounmap(hga_vram);
+                return -EINVAL;
+        }
+
+        printk(KERN_INFO "fb%d: %s frame buffer device\n",
+               fb_info.node, fb_info.fix.id);
+        return 0;
+}
+
+#ifdef MODULE
+static void __exit hgafb_exit(void)
+{
+        hga_txt_mode();
+        hga_clear_screen();
+        unregister_framebuffer(&fb_info);
+        iounmap(hga_vram);
+        if (release_io_ports) release_region(0x3b0, 12);
+        if (release_io_port) release_region(0x3bf, 1);
+}
+#endif
+
+/* -------------------------------------------------------------------------
+ *
+ *  Modularization
+ *
+ * ------------------------------------------------------------------------- */
+
+MODULE_AUTHOR("Ferenc Bakonyi (fero@drama.obuda.kando.hu)");
+MODULE_DESCRIPTION("FBDev driver for Hercules Graphics Adaptor");
+MODULE_LICENSE("GPL");
+
+module_param(nologo, bool, 0);
+MODULE_PARM_DESC(nologo, "Disables startup logo if != 0 (default=0)");
+module_init(hgafb_init);
+
+#ifdef MODULE
+module_exit(hgafb_exit);
+#endif