Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

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