patch-2.1.91 linux/drivers/video/macfb.c

• Lines: 460
• Date: Sat Mar 21 11:12:49 1998
• Orig file: v2.1.90/linux/drivers/video/macfb.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.90/linux/drivers/video/macfb.c linux/drivers/video/macfb.c
@@ -0,0 +1,459 @@
+/*
+ *	We've been given MAC frame buffer info by the booter. Now go set it up
+ */
+
+#include <linux/config.h>
+#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/nubus.h>
+#include <linux/init.h>
+
+#include <asm/setup.h>
+#include <asm/bootinfo.h>
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/irq.h>
+#include <asm/macintosh.h>
+#include <linux/fb.h>
+
+
+/* conditionalize these ?? */
+#include "fbcon-mfb.h"
+#include "fbcon-cfb2.h"
+#include "fbcon-cfb4.h"
+#include "fbcon-cfb8.h"
+
+#define arraysize(x)    (sizeof(x)/sizeof(*(x)))
+
+static struct fb_var_screeninfo macfb_defined={
+	0,0,0,0,	/* W,H, W, H (virtual) load xres,xres_virtual*/
+	0,0,		/* virtual -> visible no offset */
+	8,		/* 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 *Mikael Nykvist's anyway* */
+	FB_ACCEL_NONE,	/* The only way to accelerate a mac is .. */
+	0L,0L,0L,0L,0L,
+	0L,0L,0,	/* No sync info */
+	FB_VMODE_NONINTERLACED,
+	{0,0,0,0,0,0}
+};
+
+#define NUM_TOTAL_MODES		1
+#define NUM_PREDEF_MODES	1
+
+static struct display disp;
+static struct fb_info fb_info;
+
+static int inverse = 0;
+
+struct macfb_par
+{
+	void *unused;
+};
+
+static int currcon = 0;
+static int current_par_valid = 0;
+struct macfb_par current_par;
+
+static int mac_xres,mac_yres,mac_depth, mac_xbytes, mac_vxres;
+static unsigned long mac_videobase;
+static unsigned long mac_videosize;
+
+	/*
+	 * Open/Release the frame buffer device
+	 */
+
+static int macfb_open(struct fb_info *info)
+{
+	/*
+	 * Nothing, only a usage count for the moment
+	 */
+	MOD_INC_USE_COUNT;
+	return(0);
+}
+
+static int macfb_release(struct fb_info *info)
+{
+	MOD_DEC_USE_COUNT;
+	return(0);
+}
+
+static void macfb_encode_var(struct fb_var_screeninfo *var, 
+				struct macfb_par *par)
+{
+	int i=0;
+	var->xres=mac_xres;
+	var->yres=mac_yres;
+	var->xres_virtual=mac_vxres;
+	var->yres_virtual=var->yres;
+	var->xoffset=0;
+	var->yoffset=0;
+	var->bits_per_pixel = mac_depth;
+	var->grayscale=0;
+	var->transp.offset=0;
+	var->transp.length=0;
+	var->transp.msb_right=0;
+	var->nonstd=0;
+	var->activate=0;
+	var->height= -1;
+	var->width= -1;
+	var->accel=0;
+	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;
+	return;
+}
+
+
+static void macfb_get_par(struct macfb_par *par)
+{
+	*par=current_par;
+}
+
+static void macfb_set_par(struct macfb_par *par)
+{
+	current_par_valid=1;
+}
+
+static int fb_update_var(int con, struct fb_info *info)
+{
+	return 0;
+}
+
+static int do_fb_set_var(struct fb_var_screeninfo *var, int isactive)
+{
+	struct macfb_par par;
+	
+	macfb_get_par(&par);
+	macfb_encode_var(var, &par);
+	return 0;
+}
+
+extern int console_loglevel;
+
+static void macfb_encode_fix(struct fb_fix_screeninfo *fix, 
+				struct macfb_par *par)
+{
+	int i;
+
+	memset(fix, 0, sizeof(struct fb_fix_screeninfo));
+	strcpy(fix->id,"Macintosh");
+
+	/*
+	 * X works, but screen wraps ... 
+	 */
+	fix->smem_start=(char *)(mac_videobase&PAGE_MASK);
+	fix->smem_offset=(mac_videobase&~PAGE_MASK);
+	fix->smem_len=PAGE_ALIGN(mac_videosize);
+	fix->type = FB_TYPE_PACKED_PIXELS;
+	fix->visual = FB_VISUAL_PSEUDOCOLOR;
+	fix->xpanstep=0;
+	fix->ypanstep=0;
+	fix->ywrapstep=0;
+	fix->line_length=mac_xbytes;
+	return;
+}
+
+static int macfb_get_fix(struct fb_fix_screeninfo *fix, int con,
+			 struct fb_info *info)
+{
+	struct macfb_par par;
+	macfb_get_par(&par);
+	macfb_encode_fix(fix, &par);
+	return 0;
+}
+
+static int macfb_get_var(struct fb_var_screeninfo *var, int con,
+			 struct fb_info *info)
+{
+	struct macfb_par par;
+	if(con==-1)
+	{
+		macfb_get_par(&par);
+		macfb_encode_var(var, &par);
+	}
+	else
+		*var=fb_display[con].var;
+	return 0;
+}
+
+static void macfb_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 */
+
+	macfb_get_fix(&fix, con, 0);
+
+	display->screen_base = (u_char *)(fix.smem_start+fix.smem_offset);
+	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 = inverse;
+
+	switch (mac_depth) {
+#ifdef CONFIG_FBCON_MFB
+	    case 1:
+		display->dispsw = &fbcon_mfb;
+		break;
+#endif
+#ifdef CONFIG_FBCON_CFB2
+	    case 2:
+		display->dispsw = &fbcon_cfb2;
+		break;
+#endif
+#ifdef CONFIG_FBCON_CFB4
+	    case 4:
+		display->dispsw = &fbcon_cfb4;
+		break;
+#endif
+#ifdef CONFIG_FBCON_CFB8
+	    case 8:
+		display->dispsw = &fbcon_cfb8;
+		break;
+#endif
+	    default:
+		display->dispsw = NULL;
+		break;
+	}
+}
+
+static int macfb_set_var(struct fb_var_screeninfo *var, int con,
+			 struct fb_info *info)
+{
+	int err;
+	
+	if ((err=do_fb_set_var(var, 1)))
+		return err;
+	return 0;
+}
+
+static int macfb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
+			  struct fb_info *info)
+{
+#if 0
+	printk("macfb_get_cmap: not supported!\n");
+	/* interferes with X11 */
+	if (console_loglevel < 7)
+		return -EINVAL;
+	if (con == currcon) /* current console? */
+		return fb_get_cmap(cmap, &fb_display[con].var, kspc, 0 /*offb_getcolreg*/, info);
+	else if (fb_display[con].cmap.len) /* non default colormap? */
+		fb_copy_cmap(&fb_display[con].cmap, cmap, kspc ? 0 : 2);
+	else
+		fb_copy_cmap(fb_default_cmap(fb_display[con].var.bits_per_pixel),
+		     cmap, kspc ? 0 : 2);
+#endif
+	return 0;
+
+}
+
+static int macfb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
+			  struct fb_info *info)
+{
+#if 0
+	printk("macfb_set_cmap: not supported!\n");
+	if (console_loglevel < 7)
+		return -EINVAL;
+	if (!fb_display[con].cmap.len) {	/* no colormap allocated? */
+		if ((err = fb_alloc_cmap(&fb_display[con].cmap,
+				 1<<fb_display[con].var.bits_per_pixel, 0)))
+		return err;
+	}
+	if (con == currcon)			/* current console? */
+		return fb_set_cmap(cmap, &fb_display[con].var, kspc, 1 /*offb_setcolreg*/, info);
+	else
+		fb_copy_cmap(cmap, &fb_display[con].cmap, kspc ? 0 : 1);
+#endif
+	return 0;
+}
+
+static int macfb_pan_display(struct fb_var_screeninfo *var, int con,
+			     struct fb_info *info)
+{
+	/* no panning */
+	printk("macfb_pan: not supported!\n");
+	return -EINVAL;
+}
+
+static int macfb_ioctl(struct inode *inode, struct file *file, 
+		       unsigned int cmd, unsigned long arg, int con,
+		       struct fb_info *info)
+{
+	printk("macfb_ioctl: not supported!\n");
+	return -EINVAL;
+}
+
+static struct fb_ops macfb_ops = {
+	macfb_open,
+	macfb_release,
+	macfb_get_fix,
+	macfb_get_var,
+	macfb_set_var,
+	macfb_get_cmap,
+	macfb_set_cmap,
+	macfb_pan_display,
+	NULL,
+	macfb_ioctl
+};
+
+void macfb_setup(char *options, int *ints)
+{
+    char *this_opt;
+    int temp;
+
+    fb_info.fontname[0] = '\0';
+
+    if (!options || !*options)
+		return;
+     
+    for(this_opt=strtok(options,","); this_opt; this_opt=strtok(NULL,",")) {
+	if (!*this_opt) continue;
+
+	if (! strcmp(this_opt, "inverse"))
+		inverse=1;
+	else if (!strncmp(this_opt, "font:", 5)) {
+	   strcpy(fb_info.fontname, this_opt+5);
+	   printk("macfb_setup: option %s\n", this_opt);
+	}
+    }
+}
+
+static int macfb_switch(int con, struct fb_info *info)
+{
+	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 macfb_blank(int blank, struct fb_info *info)
+{
+	/* Not supported */
+}
+
+/*
+ *	Nubus call back. This will give us our board identity and also
+ *	other useful info we need later
+ */
+ 
+static int nubus_video_card(struct nubus_device_specifier *ns, int slot, struct nubus_type *nt)
+{
+	if(nt->category==NUBUS_CAT_DISPLAY)
+		return 0;
+	/* Claim all video cards. We dont yet do driver specifics tho. */
+	return -ENODEV;
+}
+
+static struct nubus_device_specifier nb_video={
+	nubus_video_card,
+	NULL
+};
+
+__initfunc(unsigned long macfb_init(unsigned long mem_start))
+{
+	/* nubus_remap the video .. */
+	int err;
+
+	if (!MACH_IS_MAC) 
+		return mem_start;
+
+	mac_xres=mac_bi_data.dimensions&0xFFFF;
+	mac_yres=(mac_bi_data.dimensions&0xFFFF0000)>>16;
+	mac_depth=mac_bi_data.videodepth;
+	mac_xbytes=mac_bi_data.videorow;
+	mac_vxres = (mac_xbytes/mac_depth)*8;
+	mac_videosize=mac_xbytes*mac_yres;
+	mac_videobase=mac_bi_data.videoaddr;
+
+	printk("macfb_init: xres %d yres %d bpp %d addr %x size %d \n",
+		mac_xres, mac_yres, mac_depth, mac_videobase, mac_videosize);
+
+	mac_debugging_penguin(4);
+	
+	/*
+	 *	Fill in the available video resolution
+	 */
+	 
+	 macfb_defined.xres=mac_xres;
+	 macfb_defined.yres=mac_yres;
+	 macfb_defined.xres_virtual=mac_vxres;
+	 macfb_defined.yres_virtual=mac_yres;
+	 macfb_defined.bits_per_pixel=mac_depth;
+	 
+	 
+	/*
+	 *	Let there be consoles..
+	 */
+	strcpy(fb_info.modename, "Macintosh Builtin ");
+	fb_info.changevar = NULL;
+	fb_info.node = -1;
+	fb_info.fbops = &macfb_ops;
+	fb_info.disp=&disp;
+	fb_info.switch_con=&macfb_switch;
+	fb_info.updatevar=&fb_update_var;
+	fb_info.blank=&macfb_blank;
+	do_fb_set_var(&macfb_defined,1);
+
+	err=register_framebuffer(&fb_info);
+	if(err<0)
+	{
+		mac_boom(6);
+		return NULL;
+	}
+
+	macfb_get_var(&disp.var, -1, &fb_info);
+	macfb_set_disp(-1);
+
+	/*
+	 *	Register the nubus hook
+	 */
+	 
+	register_nubus_device(&nb_video);
+
+	printk("fb%d: %s frame buffer device using %ldK of video memory\n",
+	       GET_FB_IDX(fb_info.node), fb_info.modename, mac_videosize>>10);
+
+	return mem_start;
+}
+
+#if 0
+/*
+ * These two auxiliary debug functions should go away ASAP. Only usage: 
+ * before the console output is up (after head.S come some other crucial
+ * setup routines :-) 
+ *
+ * Now in debug.c ...
+ */
+#endif