patch-2.4.4 linux/drivers/video/maxinefb.c

• Lines: 426
• Date: Wed Apr 18 11:49:12 2001
• Orig file: v2.4.3/linux/drivers/video/maxinefb.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.3/linux/drivers/video/maxinefb.c linux/drivers/video/maxinefb.c
@@ -0,0 +1,425 @@
+/*
+ *      linux/drivers/video/maxinefb.c
+ *
+ *	DECstation 5000/xx onboard framebuffer support ... derived from:
+ *	"HP300 Topcat framebuffer support (derived from macfb of all things)
+ *	Phil Blundell <philb@gnu.org> 1998", the original code can be
+ *      found in the file hpfb.c in the same directory.
+ *
+ *      DECstation related code Copyright (C) 1999,2000,2001 by
+ *      Michael Engel <engel@unix-ag.org> and
+ *      Karsten Merker <merker@linuxtag.org>.
+ *      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.
+ *
+ */
+
+/*
+ * Changes:
+ * 2001/01/27 removed debugging and testing code, fixed fb_ops
+ *            initialization which had caused a crash before,
+ *            general cleanup, first official release (KM)
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/malloc.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/fb.h>
+#include <video/fbcon.h>
+#include "maxinefb.h"
+
+/* bootinfo.h defines the machine type values, needed when checking */
+/* whether are really running on a maxine, KM                       */
+#include <asm/bootinfo.h>
+
+#include <video/fbcon-mfb.h>
+#include <video/fbcon-cfb2.h>
+#include <video/fbcon-cfb4.h>
+#include <video/fbcon-cfb8.h>
+
+#define arraysize(x)    (sizeof(x)/sizeof(*(x)))
+
+static struct display disp;
+static struct fb_info fb_info;
+
+unsigned long fb_start, fb_size = 1024 * 768, fb_line_length = 1024;
+unsigned long fb_regs;
+unsigned char fb_bitmask;
+
+static struct fb_var_screeninfo maxinefb_defined = {
+	0, 0, 0, 0,		/* W,H, W, H (virtual) load xres,xres_virtual */
+	0, 0,			/* virtual -> visible no offset */
+	0,			/* depth -> load bits_per_pixel */
+	0,			/* greyscale ? */
+	{0, 0, 0},		/* R */
+	{0, 0, 0},		/* G */
+	{0, 0, 0},		/* B */
+	{0, 0, 0},		/* transparency */
+	0,			/* standard pixel format */
+	FB_ACTIVATE_NOW,
+	274, 195,		/* 14" monitor */
+	FB_ACCEL_NONE,
+	0L, 0L, 0L, 0L, 0L,
+	0L, 0L, 0,		/* No sync info */
+	FB_VMODE_NONINTERLACED,
+	{0, 0, 0, 0, 0, 0}
+};
+
+struct maxinefb_par {
+};
+
+static int currcon = 0;
+struct maxinefb_par current_par;
+
+/* Reference to machine type set in arch/mips/dec/prom/identify.c, KM */
+extern unsigned long mips_machtype;
+
+
+/* Handle the funny Inmos RamDAC/video controller ... */
+
+void maxinefb_ims332_write_register(int regno, register unsigned int val)
+{
+	register unsigned char *regs = (char *) MAXINEFB_IMS332_ADDRESS;
+	unsigned char *wptr;
+
+	wptr = regs + 0xa0000 + (regno << 4);
+	*((volatile unsigned int *) (regs)) = (val >> 8) & 0xff00;
+	*((volatile unsigned short *) (wptr)) = val;
+}
+
+unsigned int maxinefb_ims332_read_register(int regno)
+{
+	register unsigned char *regs = (char *) MAXINEFB_IMS332_ADDRESS;
+	unsigned char *rptr;
+	register unsigned int j, k;
+
+	rptr = regs + 0x80000 + (regno << 4);
+	j = *((volatile unsigned short *) rptr);
+	k = *((volatile unsigned short *) regs);
+
+	return (j & 0xffff) | ((k & 0xff00) << 8);
+}
+
+
+static void maxinefb_encode_var(struct fb_var_screeninfo *var,
+				struct maxinefb_par *par)
+{
+	int i = 0;
+	var->xres = 1024;
+	var->yres = 768;
+	var->xres_virtual = 1024;
+	var->yres_virtual = 768;
+	var->xoffset = 0;
+	var->yoffset = 0;
+	var->bits_per_pixel = 8;
+	var->grayscale = 0;
+	var->transp.offset = 0;
+	var->transp.length = 0;
+	var->transp.msb_right = 0;
+	var->nonstd = 0;
+	var->activate = 1;
+	var->height = -1;
+	var->width = -1;
+	var->vmode = FB_VMODE_NONINTERLACED;
+	var->pixclock = 0;
+	var->sync = 0;
+	var->left_margin = 0;
+	var->right_margin = 0;
+	var->upper_margin = 0;
+	var->lower_margin = 0;
+	var->hsync_len = 0;
+	var->vsync_len = 0;
+	for (i = 0; i < arraysize(var->reserved); i++)
+		var->reserved[i] = 0;
+}
+
+static void maxinefb_get_par(struct maxinefb_par *par)
+{
+	*par = current_par;
+}
+
+static int maxinefb_fb_update_var(int con, struct fb_info *info)
+{
+	return 0;
+}
+
+static int maxinefb_do_fb_set_var(struct fb_var_screeninfo *var,
+				  int isactive)
+{
+	struct maxinefb_par par;
+
+	maxinefb_get_par(&par);
+	maxinefb_encode_var(var, &par);
+	return 0;
+}
+
+
+/* Get the palette */
+
+static int maxinefb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
+			     struct fb_info *info)
+{
+	unsigned int i;
+	unsigned long hw_colorvalue = 0;	/* raw color value from the register */
+	unsigned int length;
+
+	if (((cmap->start) + (cmap->len)) >= 256) {
+		length = 256 - (cmap->start);
+	} else {
+		length = cmap->len;
+	}
+	for (i = 0; i < length; i++) {
+		hw_colorvalue =
+		    maxinefb_ims332_read_register(IMS332_REG_COLOR_PALETTE
+						  + cmap->start + i);
+		(cmap->red[i]) = ((hw_colorvalue & 0x0000ff));
+		(cmap->green[i]) = ((hw_colorvalue & 0x00ff00) >> 8);
+		(cmap->blue[i]) = ((hw_colorvalue & 0xff0000) >> 16);
+
+	}
+	return 0;
+}
+
+
+/* Set the palette */
+
+static int maxinefb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
+			     struct fb_info *info)
+{
+	unsigned int i;
+	unsigned long hw_colorvalue;	/* value to be written into the palette reg. */
+	unsigned short cmap_red;
+	unsigned short cmap_green;
+	unsigned short cmap_blue;
+	unsigned int length;
+
+	hw_colorvalue = 0;
+	if (((cmap->start) + (cmap->len)) >= 256) {
+		length = 256 - (cmap->start);
+	} else {
+		length = cmap->len;
+	}
+
+	for (i = 0; i < length; i++) {
+		cmap_red = ((cmap->red[i]) >> 8);	/* The cmap fields are 16 bits    */
+		cmap_green = ((cmap->green[i]) >> 8);	/* wide, but the harware colormap */
+		cmap_blue = ((cmap->blue[i]) >> 8);	/* registers are only 8 bits wide */
+
+		hw_colorvalue =
+		    (cmap_blue << 16) + (cmap_green << 8) + (cmap_red);
+		maxinefb_ims332_write_register(IMS332_REG_COLOR_PALETTE +
+					       cmap->start + i,
+					       hw_colorvalue);
+	}
+	return 0;
+}
+
+static int maxinefb_get_var(struct fb_var_screeninfo *var, int con,
+			    struct fb_info *info)
+{
+	struct maxinefb_par par;
+	if (con == -1) {
+		maxinefb_get_par(&par);
+		maxinefb_encode_var(var, &par);
+	} else
+		*var = fb_display[con].var;
+	return 0;
+}
+
+
+static int maxinefb_set_var(struct fb_var_screeninfo *var, int con,
+			    struct fb_info *info)
+{
+	int err;
+
+	if ((err = maxinefb_do_fb_set_var(var, 1)))
+		return err;
+	return 0;
+}
+static void maxinefb_encode_fix(struct fb_fix_screeninfo *fix,
+				struct maxinefb_par *par)
+{
+	memset(fix, 0, sizeof(struct fb_fix_screeninfo));
+	strcpy(fix->id, "maxinefb");
+	/* fix->id is a char[16], so a maximum of 15 characters, KM */
+
+	fix->smem_start = (char *) fb_start;	/* display memory base address, KM */
+	fix->smem_len = fb_size;
+	fix->type = FB_TYPE_PACKED_PIXELS;
+	fix->visual = FB_VISUAL_PSEUDOCOLOR;
+	fix->xpanstep = 0;
+	fix->ypanstep = 0;
+	fix->ywrapstep = 0;
+	fix->line_length = fb_line_length;
+}
+
+static int maxinefb_get_fix(struct fb_fix_screeninfo *fix, int con,
+			    struct fb_info *info)
+{
+	struct maxinefb_par par;
+	maxinefb_get_par(&par);
+	maxinefb_encode_fix(fix, &par);
+	return 0;
+}
+
+
+static int maxinefb_ioctl(struct inode *inode, struct file *file,
+			  unsigned int cmd, unsigned long arg, int con,
+			  struct fb_info *info)
+{
+	return -EINVAL;
+}
+
+static int maxinefb_switch(int con, struct fb_info *info)
+{
+	maxinefb_do_fb_set_var(&fb_display[con].var, 1);
+	currcon = con;
+	return 0;
+}
+
+/* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */
+
+static void maxinefb_blank(int blank, struct fb_info *info)
+{
+	/* Not supported */
+}
+
+static int maxinefb_open(struct fb_info *info, int user)
+{
+	/*
+	 * Nothing, only a usage count for the moment
+	 */
+	MOD_INC_USE_COUNT;
+	return (0);
+}
+
+static void maxinefb_set_disp(int con)
+{
+	struct fb_fix_screeninfo fix;
+	struct display *display;
+
+	if (con >= 0)
+		display = &fb_display[con];
+	else
+		display = &disp;	/* used during initialization */
+
+	maxinefb_get_fix(&fix, con, 0);
+
+	display->screen_base = fix.smem_start;
+	display->visual = fix.visual;
+	display->type = fix.type;
+	display->type_aux = fix.type_aux;
+	display->ypanstep = fix.ypanstep;
+	display->ywrapstep = fix.ywrapstep;
+	display->line_length = fix.line_length;
+	display->next_line = fix.line_length;
+	display->can_soft_blank = 0;
+	display->inverse = 0;
+
+	display->dispsw = &fbcon_cfb8;
+}
+
+static int maxinefb_release(struct fb_info *info, int user)
+{
+	MOD_DEC_USE_COUNT;
+	return (0);
+}
+
+static struct fb_ops maxinefb_ops = {
+	owner:THIS_MODULE,
+	fb_open:maxinefb_open,
+	fb_release:maxinefb_release,
+	fb_get_fix:maxinefb_get_fix,
+	fb_get_var:maxinefb_get_var,
+	fb_set_var:maxinefb_set_var,
+	fb_get_cmap:maxinefb_get_cmap,
+	fb_set_cmap:maxinefb_set_cmap,
+	fb_ioctl:maxinefb_ioctl,
+	fb_mmap:0,
+	fb_rasterimg:0
+};
+
+int __init maxinefb_init_one()
+{
+	volatile unsigned char *fboff;
+	int i;
+
+	/* Framebuffer display memory base address */
+	fb_start = DS5000_xx_ONBOARD_FBMEM_START;
+
+	/* Clear screen */
+	for (fboff = fb_start; fboff < fb_start + 0x1ffff; fboff++)
+		*fboff = 0x0;
+
+	/* erase hardware cursor */
+	for (i = 0; i < 512; i++) {
+		maxinefb_ims332_write_register(IMS332_REG_CURSOR_RAM + i,
+					       0);
+		/*
+		   if (i&0x8 == 0)
+		   maxinefb_ims332_write_register (IMS332_REG_CURSOR_RAM + i, 0x0f);
+		   else
+		   maxinefb_ims332_write_register (IMS332_REG_CURSOR_RAM + i, 0xf0);
+		 */
+	}
+
+	/* Fill in the available video resolution */
+	maxinefb_defined.xres = 1024;
+	maxinefb_defined.yres = 768;
+	maxinefb_defined.xres_virtual = 1024;
+	maxinefb_defined.yres_virtual = 768;
+	maxinefb_defined.bits_per_pixel = 8;
+
+	/* Let there be consoles... */
+
+	strcpy(fb_info.modename, "Maxine onboard graphics 1024x768x8");
+	/* fb_info.modename: maximum of 39 characters + trailing nullbyte, KM */
+	fb_info.changevar = NULL;
+	fb_info.node = -1;
+	fb_info.fbops = &maxinefb_ops;
+	fb_info.disp = &disp;
+	fb_info.switch_con = &maxinefb_switch;
+	fb_info.updatevar = &maxinefb_fb_update_var;
+	fb_info.blank = &maxinefb_blank;
+	fb_info.flags = FBINFO_FLAG_DEFAULT;
+	maxinefb_do_fb_set_var(&maxinefb_defined, 1);
+
+	maxinefb_get_var(&disp.var, -1, &fb_info);
+	maxinefb_set_disp(-1);
+
+	if (register_framebuffer(&fb_info) < 0)
+		return 1;
+
+	return 0;
+}
+
+
+/* Initialise the framebuffer */
+
+void __init maxinefb_init()
+{
+	unsigned int sid;
+
+	if (mips_machtype == MACH_DS5000_XX) {
+		printk("Maxinefb: Personal DECstation detected\n");
+		printk("Maxinefb: initializing onboard framebuffer\n");
+
+		maxinefb_init_one();
+
+	}
+
+}
+
+void __init maxinefb_setup(char *options, int *ints)
+{
+}