Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 713 insertions, 0 deletions

diff --git a/drivers/video/fbdev/platinumfb.c b/drivers/video/fbdev/platinumfb.c
new file mode 100644
index 000000000..377d3399a
--- /dev/null
+++ b/drivers/video/fbdev/platinumfb.c
@@ -0,0 +1,713 @@
+/*
+ *  platinumfb.c -- frame buffer device for the PowerMac 'platinum' display
+ *
+ *  Copyright (C) 1998 Franz Sirl
+ *
+ *  Frame buffer structure from:
+ *    drivers/video/controlfb.c -- frame buffer device for
+ *    Apple 'control' display chip.
+ *    Copyright (C) 1998 Dan Jacobowitz
+ *
+ *  Hardware information from:
+ *    platinum.c: Console support for PowerMac "platinum" display adaptor.
+ *    Copyright (C) 1996 Paul Mackerras and Mark Abene
+ *
+ *  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.
+ */
+
+#undef DEBUG
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/vmalloc.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/nvram.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/pgtable.h>
+
+#include "macmodes.h"
+#include "platinumfb.h"
+
+static int default_vmode = VMODE_NVRAM;
+static int default_cmode = CMODE_NVRAM;
+
+struct fb_info_platinum {
+	struct fb_info			*info;
+
+	int				vmode, cmode;
+	int				xres, yres;
+	int				vxres, vyres;
+	int				xoffset, yoffset;
+
+	struct {
+		__u8 red, green, blue;
+	}				palette[256];
+	u32				pseudo_palette[16];
+	
+	volatile struct cmap_regs	__iomem *cmap_regs;
+	unsigned long			cmap_regs_phys;
+	
+	volatile struct platinum_regs	__iomem *platinum_regs;
+	unsigned long			platinum_regs_phys;
+	
+	__u8				__iomem *frame_buffer;
+	volatile __u8			__iomem *base_frame_buffer;
+	unsigned long			frame_buffer_phys;
+	
+	unsigned long			total_vram;
+	int				clktype;
+	int				dactype;
+
+	struct resource			rsrc_fb, rsrc_reg;
+};
+
+/*
+ * Frame buffer device API
+ */
+
+static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+	u_int transp, struct fb_info *info);
+static int platinumfb_blank(int blank_mode, struct fb_info *info);
+static int platinumfb_set_par (struct fb_info *info);
+static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info);
+
+/*
+ * internal functions
+ */
+
+static inline int platinum_vram_reqd(int video_mode, int color_mode);
+static int read_platinum_sense(struct fb_info_platinum *pinfo);
+static void set_platinum_clock(struct fb_info_platinum *pinfo);
+static void platinum_set_hardware(struct fb_info_platinum *pinfo);
+static int platinum_var_to_par(struct fb_var_screeninfo *var,
+			       struct fb_info_platinum *pinfo,
+			       int check_only);
+
+/*
+ * Interface used by the world
+ */
+
+static struct fb_ops platinumfb_ops = {
+	.owner =	THIS_MODULE,
+	.fb_check_var	= platinumfb_check_var,
+	.fb_set_par	= platinumfb_set_par,
+	.fb_setcolreg	= platinumfb_setcolreg,
+	.fb_blank	= platinumfb_blank,
+	.fb_fillrect	= cfb_fillrect,
+	.fb_copyarea	= cfb_copyarea,
+	.fb_imageblit	= cfb_imageblit,
+};
+
+/*
+ * Checks a var structure
+ */
+static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	return platinum_var_to_par(var, info->par, 1);
+}
+
+/*
+ * Applies current var to display
+ */
+static int platinumfb_set_par (struct fb_info *info)
+{
+	struct fb_info_platinum *pinfo = info->par;
+	struct platinum_regvals *init;
+	int err, offset = 0x20;
+
+	if((err = platinum_var_to_par(&info->var, pinfo, 0))) {
+		printk (KERN_ERR "platinumfb_set_par: error calling"
+				 " platinum_var_to_par: %d.\n", err);
+		return err;
+	}
+
+	platinum_set_hardware(pinfo);
+
+	init = platinum_reg_init[pinfo->vmode-1];
+	
+ 	if ((pinfo->vmode == VMODE_832_624_75) && (pinfo->cmode > CMODE_8))
+  		offset = 0x10;
+
+	info->screen_base = pinfo->frame_buffer + init->fb_offset + offset;
+	mutex_lock(&info->mm_lock);
+	info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset;
+	mutex_unlock(&info->mm_lock);
+	info->fix.visual = (pinfo->cmode == CMODE_8) ?
+		FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
+ 	info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode)
+		+ offset;
+	printk("line_length: %x\n", info->fix.line_length);
+	return 0;
+}
+
+static int platinumfb_blank(int blank,  struct fb_info *fb)
+{
+/*
+ *  Blank the screen if blank_mode != 0, else unblank. If blank == NULL
+ *  then the caller blanks by setting the CLUT (Color Look Up Table) to all
+ *  black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
+ *  to e.g. a video mode which doesn't support it. Implements VESA suspend
+ *  and powerdown modes on hardware that supports disabling hsync/vsync:
+ *    blank_mode == 2: suspend vsync
+ *    blank_mode == 3: suspend hsync
+ *    blank_mode == 4: powerdown
+ */
+/* [danj] I think there's something fishy about those constants... */
+/*
+	struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
+	int	ctrl;
+
+	ctrl = le32_to_cpup(&info->platinum_regs->ctrl.r) | 0x33;
+	if (blank)
+		--blank_mode;
+	if (blank & VESA_VSYNC_SUSPEND)
+		ctrl &= ~3;
+	if (blank & VESA_HSYNC_SUSPEND)
+		ctrl &= ~0x30;
+	out_le32(&info->platinum_regs->ctrl.r, ctrl);
+*/
+/* TODO: Figure out how the heck to powerdown this thing! */
+	return 0;
+}
+
+static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+			      u_int transp, struct fb_info *info)
+{
+	struct fb_info_platinum *pinfo = info->par;
+	volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
+
+	if (regno > 255)
+		return 1;
+
+	red >>= 8;
+	green >>= 8;
+	blue >>= 8;
+
+	pinfo->palette[regno].red = red;
+	pinfo->palette[regno].green = green;
+	pinfo->palette[regno].blue = blue;
+
+	out_8(&cmap_regs->addr, regno);		/* tell clut what addr to fill	*/
+	out_8(&cmap_regs->lut, red);		/* send one color channel at	*/
+	out_8(&cmap_regs->lut, green);		/* a time...			*/
+	out_8(&cmap_regs->lut, blue);
+
+	if (regno < 16) {
+		int i;
+		u32 *pal = info->pseudo_palette;
+		switch (pinfo->cmode) {
+		case CMODE_16:
+			pal[regno] = (regno << 10) | (regno << 5) | regno;
+			break;
+		case CMODE_32:
+			i = (regno << 8) | regno;
+			pal[regno] = (i << 16) | i;
+			break;
+		}
+	}
+	
+	return 0;
+}
+
+static inline int platinum_vram_reqd(int video_mode, int color_mode)
+{
+	int baseval = vmode_attrs[video_mode-1].hres * (1<<color_mode);
+
+	if ((video_mode == VMODE_832_624_75) && (color_mode > CMODE_8))
+		baseval += 0x10;
+	else
+		baseval += 0x20;
+
+	return vmode_attrs[video_mode-1].vres * baseval + 0x1000;
+}
+
+#define STORE_D2(a, d) { \
+	out_8(&cmap_regs->addr, (a+32)); \
+	out_8(&cmap_regs->d2, (d)); \
+}
+
+static void set_platinum_clock(struct fb_info_platinum *pinfo)
+{
+	volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
+	struct platinum_regvals	*init;
+
+	init = platinum_reg_init[pinfo->vmode-1];
+
+	STORE_D2(6, 0xc6);
+	out_8(&cmap_regs->addr,3+32);
+
+	if (in_8(&cmap_regs->d2) == 2) {
+		STORE_D2(7, init->clock_params[pinfo->clktype][0]);
+		STORE_D2(8, init->clock_params[pinfo->clktype][1]);
+		STORE_D2(3, 3);
+	} else {
+		STORE_D2(4, init->clock_params[pinfo->clktype][0]);
+		STORE_D2(5, init->clock_params[pinfo->clktype][1]);
+		STORE_D2(3, 2);
+	}
+
+	__delay(5000);
+	STORE_D2(9, 0xa6);
+}
+
+
+/* Now how about actually saying, Make it so! */
+/* Some things in here probably don't need to be done each time. */
+static void platinum_set_hardware(struct fb_info_platinum *pinfo)
+{
+	volatile struct platinum_regs	__iomem *platinum_regs = pinfo->platinum_regs;
+	volatile struct cmap_regs	__iomem *cmap_regs = pinfo->cmap_regs;
+	struct platinum_regvals		*init;
+	int				i;
+	int				vmode, cmode;
+	
+	vmode = pinfo->vmode;
+	cmode = pinfo->cmode;
+
+	init = platinum_reg_init[vmode - 1];
+
+	/* Initialize display timing registers */
+	out_be32(&platinum_regs->reg[24].r, 7);	/* turn display off */
+
+	for (i = 0; i < 26; ++i)
+		out_be32(&platinum_regs->reg[i+32].r, init->regs[i]);
+
+	out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ?
+						init->offset[cmode] + 4 - cmode :
+						init->offset[cmode]));
+	out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10);
+	out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]);
+	out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ?
+					     init->mode[cmode+1] :
+					     init->mode[cmode]));
+	out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011));
+	out_be32(&platinum_regs->reg[21].r, 0x100);
+	out_be32(&platinum_regs->reg[22].r, 1);
+	out_be32(&platinum_regs->reg[23].r, 1);
+	out_be32(&platinum_regs->reg[26].r, 0xc00);
+	out_be32(&platinum_regs->reg[27].r, 0x235);
+	/* out_be32(&platinum_regs->reg[27].r, 0x2aa); */
+
+	STORE_D2(0, (pinfo->total_vram == 0x100000 ?
+		     init->dacula_ctrl[cmode] & 0xf :
+		     init->dacula_ctrl[cmode]));
+	STORE_D2(1, 4);
+	STORE_D2(2, 0);
+
+	set_platinum_clock(pinfo);
+
+	out_be32(&platinum_regs->reg[24].r, 0);	/* turn display on */
+}
+
+/*
+ * Set misc info vars for this driver
+ */
+static void platinum_init_info(struct fb_info *info,
+			       struct fb_info_platinum *pinfo)
+{
+	/* Fill fb_info */
+	info->fbops = &platinumfb_ops;
+	info->pseudo_palette = pinfo->pseudo_palette;
+        info->flags = FBINFO_DEFAULT;
+	info->screen_base = pinfo->frame_buffer + 0x20;
+
+	fb_alloc_cmap(&info->cmap, 256, 0);
+
+	/* Fill fix common fields */
+	strcpy(info->fix.id, "platinum");
+	info->fix.mmio_start = pinfo->platinum_regs_phys;
+	info->fix.mmio_len = 0x1000;
+	info->fix.type = FB_TYPE_PACKED_PIXELS;
+	info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */
+	info->fix.smem_len = pinfo->total_vram - 0x20;
+        info->fix.ywrapstep = 0;
+	info->fix.xpanstep = 0;
+	info->fix.ypanstep = 0;
+        info->fix.type_aux = 0;
+        info->fix.accel = FB_ACCEL_NONE;
+}
+
+
+static int platinum_init_fb(struct fb_info *info)
+{
+	struct fb_info_platinum *pinfo = info->par;
+	struct fb_var_screeninfo var;
+	int sense, rc;
+
+	sense = read_platinum_sense(pinfo);
+	printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense);
+	if (default_vmode == VMODE_NVRAM) {
+#ifdef CONFIG_NVRAM
+		default_vmode = nvram_read_byte(NV_VMODE);
+		if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
+		    !platinum_reg_init[default_vmode-1])
+#endif
+			default_vmode = VMODE_CHOOSE;
+	}
+	if (default_vmode == VMODE_CHOOSE) {
+		default_vmode = mac_map_monitor_sense(sense);
+	}
+	if (default_vmode <= 0 || default_vmode > VMODE_MAX)
+		default_vmode = VMODE_640_480_60;
+#ifdef CONFIG_NVRAM
+	if (default_cmode == CMODE_NVRAM)
+		default_cmode = nvram_read_byte(NV_CMODE);
+#endif
+	if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
+		default_cmode = CMODE_8;
+	/*
+	 * Reduce the pixel size if we don't have enough VRAM.
+	 */
+	while(default_cmode > CMODE_8 &&
+	      platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram)
+		default_cmode--;
+
+	printk("platinumfb:  Using video mode %d and color mode %d.\n", default_vmode, default_cmode);
+
+	/* Setup default var */
+	if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
+		/* This shouldn't happen! */
+		printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode);
+try_again:
+		default_vmode = VMODE_640_480_60;
+		default_cmode = CMODE_8;
+		if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
+			printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n");
+			return -ENXIO;
+		}
+	}
+
+	/* Initialize info structure */
+	platinum_init_info(info, pinfo);
+
+	/* Apply default var */
+	info->var = var;
+	var.activate = FB_ACTIVATE_NOW;
+	rc = fb_set_var(info, &var);
+	if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8))
+		goto try_again;
+
+	/* Register with fbdev layer */
+	rc = register_framebuffer(info);
+	if (rc < 0)
+		return rc;
+
+	fb_info(info, "Apple Platinum frame buffer device\n");
+
+	return 0;
+}
+
+/*
+ * Get the monitor sense value.
+ * Note that this can be called before calibrate_delay,
+ * so we can't use udelay.
+ */
+static int read_platinum_sense(struct fb_info_platinum *info)
+{
+	volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs;
+	int sense;
+
+	out_be32(&platinum_regs->reg[23].r, 7);	/* turn off drivers */
+	__delay(2000);
+	sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8;
+
+	/* drive each sense line low in turn and collect the other 2 */
+	out_be32(&platinum_regs->reg[23].r, 3);	/* drive A low */
+	__delay(2000);
+	sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4;
+	out_be32(&platinum_regs->reg[23].r, 5);	/* drive B low */
+	__delay(2000);
+	sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1;
+	sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2;
+	out_be32(&platinum_regs->reg[23].r, 6);	/* drive C low */
+	__delay(2000);
+	sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1;
+
+	out_be32(&platinum_regs->reg[23].r, 7);	/* turn off drivers */
+
+	return sense;
+}
+
+/*
+ * This routine takes a user-supplied var, and picks the best vmode/cmode from it.
+ * It also updates the var structure to the actual mode data obtained
+ */
+static int platinum_var_to_par(struct fb_var_screeninfo *var, 
+			       struct fb_info_platinum *pinfo,
+			       int check_only)
+{
+	int vmode, cmode;
+
+	if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
+		printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n");
+		printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres);
+		printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres);
+		printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual);
+		printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual);
+		printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel);
+		printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock);
+		printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode);
+		return -EINVAL;
+	}
+
+	if (!platinum_reg_init[vmode-1]) {
+		printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode);
+		return -EINVAL;
+	}
+
+	if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) {
+		printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode);
+		return -EINVAL;
+	}
+
+	if (mac_vmode_to_var(vmode, cmode, var))
+		return -EINVAL;
+
+	if (check_only)
+		return 0;
+
+	pinfo->vmode = vmode;
+	pinfo->cmode = cmode;
+	pinfo->xres = vmode_attrs[vmode-1].hres;
+	pinfo->yres = vmode_attrs[vmode-1].vres;
+	pinfo->xoffset = 0;
+	pinfo->yoffset = 0;
+	pinfo->vxres = pinfo->xres;
+	pinfo->vyres = pinfo->yres;
+	
+	return 0;
+}
+
+
+/* 
+ * Parse user specified options (`video=platinumfb:')
+ */
+static int __init platinumfb_setup(char *options)
+{
+	char *this_opt;
+
+	if (!options || !*options)
+		return 0;
+
+	while ((this_opt = strsep(&options, ",")) != NULL) {
+		if (!strncmp(this_opt, "vmode:", 6)) {
+	    		int vmode = simple_strtoul(this_opt+6, NULL, 0);
+			if (vmode > 0 && vmode <= VMODE_MAX)
+				default_vmode = vmode;
+		} else if (!strncmp(this_opt, "cmode:", 6)) {
+			int depth = simple_strtoul(this_opt+6, NULL, 0);
+			switch (depth) {
+			 case 0:
+			 case 8:
+			    default_cmode = CMODE_8;
+			    break;
+			 case 15:
+			 case 16:
+			    default_cmode = CMODE_16;
+			    break;
+			 case 24:
+			 case 32:
+			    default_cmode = CMODE_32;
+			    break;
+			}
+		}
+	}
+	return 0;
+}
+
+#ifdef __powerpc__
+#define invalidate_cache(addr) \
+	asm volatile("eieio; dcbf 0,%1" \
+	: "=m" (*(addr)) : "r" (addr) : "memory");
+#else
+#define invalidate_cache(addr)
+#endif
+
+static int platinumfb_probe(struct platform_device* odev)
+{
+	struct device_node	*dp = odev->dev.of_node;
+	struct fb_info		*info;
+	struct fb_info_platinum	*pinfo;
+	volatile __u8		*fbuffer;
+	int			bank0, bank1, bank2, bank3, rc;
+
+	dev_info(&odev->dev, "Found Apple Platinum video hardware\n");
+
+	info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
+	if (info == NULL) {
+		dev_err(&odev->dev, "Failed to allocate fbdev !\n");
+		return -ENOMEM;
+	}
+	pinfo = info->par;
+
+	if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
+	    of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
+		dev_err(&odev->dev, "Can't get resources\n");
+		framebuffer_release(info);
+		return -ENXIO;
+	}
+	dev_dbg(&odev->dev, " registers  : 0x%llx...0x%llx\n",
+		(unsigned long long)pinfo->rsrc_reg.start,
+		(unsigned long long)pinfo->rsrc_reg.end);
+	dev_dbg(&odev->dev, " framebuffer: 0x%llx...0x%llx\n",
+		(unsigned long long)pinfo->rsrc_fb.start,
+		(unsigned long long)pinfo->rsrc_fb.end);
+
+	/* Do not try to request register space, they overlap with the
+	 * northbridge and that can fail. Only request framebuffer
+	 */
+	if (!request_mem_region(pinfo->rsrc_fb.start,
+				resource_size(&pinfo->rsrc_fb),
+				"platinumfb framebuffer")) {
+		printk(KERN_ERR "platinumfb: Can't request framebuffer !\n");
+		framebuffer_release(info);
+		return -ENXIO;
+	}
+
+	/* frame buffer - map only 4MB */
+	pinfo->frame_buffer_phys = pinfo->rsrc_fb.start;
+	pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000,
+					_PAGE_WRITETHRU);
+	pinfo->base_frame_buffer = pinfo->frame_buffer;
+
+	/* registers */
+	pinfo->platinum_regs_phys = pinfo->rsrc_reg.start;
+	pinfo->platinum_regs = ioremap(pinfo->rsrc_reg.start, 0x1000);
+
+	pinfo->cmap_regs_phys = 0xf301b000;	/* XXX not in prom? */
+	request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap");
+	pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000);
+
+	/* Grok total video ram */
+	out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys);
+	out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011);	/* select max vram */
+	out_be32(&pinfo->platinum_regs->reg[24].r, 0);	/* switch in vram */
+
+	fbuffer = pinfo->base_frame_buffer;
+	fbuffer[0x100000] = 0x34;
+	fbuffer[0x100008] = 0x0;
+	invalidate_cache(&fbuffer[0x100000]);
+	fbuffer[0x200000] = 0x56;
+	fbuffer[0x200008] = 0x0;
+	invalidate_cache(&fbuffer[0x200000]);
+	fbuffer[0x300000] = 0x78;
+	fbuffer[0x300008] = 0x0;
+	invalidate_cache(&fbuffer[0x300000]);
+	bank0 = 1; /* builtin 1MB vram, always there */
+	bank1 = fbuffer[0x100000] == 0x34;
+	bank2 = fbuffer[0x200000] == 0x56;
+	bank3 = fbuffer[0x300000] == 0x78;
+	pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
+	printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n",
+	       (unsigned int) (pinfo->total_vram / 1024 / 1024),
+	       bank3, bank2, bank1, bank0);
+
+	/*
+	 * Try to determine whether we have an old or a new DACula.
+	 */
+	out_8(&pinfo->cmap_regs->addr, 0x40);
+	pinfo->dactype = in_8(&pinfo->cmap_regs->d2);
+	switch (pinfo->dactype) {
+	case 0x3c:
+		pinfo->clktype = 1;
+		printk(KERN_INFO "platinumfb: DACula type 0x3c\n");
+		break;
+	case 0x84:
+		pinfo->clktype = 0;
+		printk(KERN_INFO "platinumfb: DACula type 0x84\n");
+		break;
+	default:
+		pinfo->clktype = 0;
+		printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype);
+		break;
+	}
+	dev_set_drvdata(&odev->dev, info);
+	
+	rc = platinum_init_fb(info);
+	if (rc != 0) {
+		iounmap(pinfo->frame_buffer);
+		iounmap(pinfo->platinum_regs);
+		iounmap(pinfo->cmap_regs);
+		framebuffer_release(info);
+	}
+
+	return rc;
+}
+
+static int platinumfb_remove(struct platform_device* odev)
+{
+	struct fb_info		*info = dev_get_drvdata(&odev->dev);
+	struct fb_info_platinum	*pinfo = info->par;
+	
+        unregister_framebuffer (info);
+	
+	/* Unmap frame buffer and registers */
+	iounmap(pinfo->frame_buffer);
+	iounmap(pinfo->platinum_regs);
+	iounmap(pinfo->cmap_regs);
+
+	release_mem_region(pinfo->rsrc_fb.start,
+			   resource_size(&pinfo->rsrc_fb));
+
+	release_mem_region(pinfo->cmap_regs_phys, 0x1000);
+
+	framebuffer_release(info);
+
+	return 0;
+}
+
+static struct of_device_id platinumfb_match[] = 
+{
+	{
+	.name 		= "platinum",
+	},
+	{},
+};
+
+static struct platform_driver platinum_driver = 
+{
+	.driver = {
+		.name = "platinumfb",
+		.of_match_table = platinumfb_match,
+	},
+	.probe		= platinumfb_probe,
+	.remove		= platinumfb_remove,
+};
+
+static int __init platinumfb_init(void)
+{
+#ifndef MODULE
+	char *option = NULL;
+
+	if (fb_get_options("platinumfb", &option))
+		return -ENODEV;
+	platinumfb_setup(option);
+#endif
+	platform_driver_register(&platinum_driver);
+
+	return 0;
+}
+
+static void __exit platinumfb_exit(void)
+{
+	platform_driver_unregister(&platinum_driver);
+}
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video");
+module_init(platinumfb_init);
+
+#ifdef MODULE
+module_exit(platinumfb_exit);
+#endif