From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: 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!
---
 drivers/video/epson1355fb.c | 774 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 774 insertions(+)
 create mode 100644 drivers/video/epson1355fb.c

(limited to 'drivers/video/epson1355fb.c')

diff --git a/drivers/video/epson1355fb.c b/drivers/video/epson1355fb.c
new file mode 100644
index 00000000000..116e808d71c
--- /dev/null
+++ b/drivers/video/epson1355fb.c
@@ -0,0 +1,774 @@
+/*
+ * linux/drivers/video/epson1355fb.c -- Epson S1D13505 frame buffer for 2.5.
+ *
+ * Epson Research S1D13505 Embedded RAMDAC LCD/CRT Controller
+ *   (previously known as SED1355)
+ *
+ * Cf. http://www.erd.epson.com/vdc/html/S1D13505.html
+ *
+ *
+ * Copyright (C) Hewlett-Packard Company.  All rights reserved.
+ *
+ * Written by Christopher Hoover <ch@hpl.hp.com>
+ *
+ * Adapted from:
+ *
+ *  linux/drivers/video/skeletonfb.c
+ *  Modified to new api Jan 2001 by James Simmons (jsimmons@infradead.org)
+ *  Created 28 Dec 1997 by Geert Uytterhoeven
+ *
+ *  linux/drivers/video/epson1355fb.c (2.4 driver)
+ *  Copyright (C) 2000 Philipp Rumpf <prumpf@tux.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.
+ *
+ *
+ * Noteworthy Issues
+ * -----------------
+ *
+ * This driver is complicated by the fact that this is a 16-bit chip
+ * and, on at least one platform (ceiva), we can only do 16-bit reads
+ * and writes to the framebuffer.  We hide this from user space
+ * except in the case of mmap().
+ *
+ *
+ * To Do
+ * -----
+ *
+ * - Test 8-bit pseudocolor mode
+ * - Allow setting bpp, virtual resolution
+ * - Implement horizontal panning
+ * - (maybe) Implement hardware cursor
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.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/types.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#include <video/epson1355.h>
+
+struct epson1355_par {
+	unsigned long reg_addr;
+};
+
+/* ------------------------------------------------------------------------- */
+
+#ifdef CONFIG_SUPERH
+
+static inline u8 epson1355_read_reg(int index)
+{
+	return ctrl_inb(par.reg_addr + index);
+}
+
+static inline void epson1355_write_reg(u8 data, int index)
+{
+	ctrl_outb(data, par.reg_addr + index);
+}
+
+#elif defined(CONFIG_ARM)
+
+# ifdef CONFIG_ARCH_CEIVA
+#  include <asm/arch/hardware.h>
+#  define EPSON1355FB_BASE_PHYS	(CEIVA_PHYS_SED1355)
+# endif
+
+static inline u8 epson1355_read_reg(struct epson1355_par *par, int index)
+{
+	return __raw_readb(par->reg_addr + index);
+}
+
+static inline void epson1355_write_reg(struct epson1355_par *par, u8 data, int index)
+{
+	__raw_writeb(data, par->reg_addr + index);
+}
+
+#else
+# error "no architecture-specific epson1355_{read,write}_reg"
+#endif
+
+#ifndef EPSON1355FB_BASE_PHYS
+# error  "EPSON1355FB_BASE_PHYS is not defined"
+#endif
+
+#define EPSON1355FB_REGS_OFS	(0)
+#define EPSON1355FB_REGS_PHYS	(EPSON1355FB_BASE_PHYS + EPSON1355FB_REGS_OFS)
+#define EPSON1355FB_REGS_LEN	(64)
+
+#define EPSON1355FB_FB_OFS	(0x00200000)
+#define EPSON1355FB_FB_PHYS	(EPSON1355FB_BASE_PHYS + EPSON1355FB_FB_OFS)
+#define EPSON1355FB_FB_LEN	(2 * 1024 * 1024)
+
+/* ------------------------------------------------------------------------- */
+
+static inline u16 epson1355_read_reg16(struct epson1355_par *par, int index)
+{
+	u8 lo = epson1355_read_reg(par, index);
+	u8 hi = epson1355_read_reg(par, index + 1);
+
+	return (hi << 8) | lo;
+}
+
+static inline void epson1355_write_reg16(struct epson1355_par *par, u16 data, int index)
+{
+	u8 lo = data & 0xff;
+	u8 hi = (data >> 8) & 0xff;
+
+	epson1355_write_reg(par, lo, index);
+	epson1355_write_reg(par, hi, index + 1);
+}
+
+static inline u32 epson1355_read_reg20(struct epson1355_par *par, int index)
+{
+	u8 b0 = epson1355_read_reg(par, index);
+	u8 b1 = epson1355_read_reg(par, index + 1);
+	u8 b2 = epson1355_read_reg(par, index + 2);
+
+	return (b2 & 0x0f) << 16 | (b1 << 8) | b0;
+}
+
+static inline void epson1355_write_reg20(struct epson1355_par *par, u32 data, int index)
+{
+	u8 b0 = data & 0xff;
+	u8 b1 = (data >> 8) & 0xff;
+	u8 b2 = (data >> 16) & 0x0f;
+
+	epson1355_write_reg(par, b0, index);
+	epson1355_write_reg(par, b1, index + 1);
+	epson1355_write_reg(par, b2, index + 2);
+}
+
+/* ------------------------------------------------------------------------- */
+
+static void set_lut(struct epson1355_par *par, u8 index, u8 r, u8 g, u8 b)
+{
+	epson1355_write_reg(par, index, REG_LUT_ADDR);
+	epson1355_write_reg(par, r, REG_LUT_DATA);
+	epson1355_write_reg(par, g, REG_LUT_DATA);
+	epson1355_write_reg(par, b, REG_LUT_DATA);
+}
+
+
+/**
+ *  	epson1355fb_setcolreg - sets a color register.
+ *      @regno: Which register in the CLUT we are programming
+ *      @red: The red value which can be up to 16 bits wide
+ *	@green: The green value which can be up to 16 bits wide
+ *	@blue:  The blue value which can be up to 16 bits wide.
+ *	@transp: If supported the alpha value which can be up to 16 bits wide.
+ *      @info: frame buffer info structure
+ *
+ *	Returns negative errno on error, or zero on success.
+ */
+static int epson1355fb_setcolreg(unsigned regno, unsigned r, unsigned g,
+				 unsigned b, unsigned transp,
+				 struct fb_info *info)
+{
+	struct epson1355_par *par = info->par;
+
+	if (info->var.grayscale)
+		r = g = b = (19595 * r + 38470 * g + 7471 * b) >> 16;
+
+	switch (info->fix.visual) {
+	case FB_VISUAL_TRUECOLOR:
+		if (regno >= 16)
+			return -EINVAL;
+
+		((u32 *) info->pseudo_palette)[regno] =
+		    (r & 0xf800) | (g & 0xfc00) >> 5 | (b & 0xf800) >> 11;
+
+		break;
+	case FB_VISUAL_PSEUDOCOLOR:
+		if (regno >= 256)
+			return -EINVAL;
+
+		set_lut(par, regno, r >> 8, g >> 8, b >> 8);
+
+		break;
+	default:
+		return -ENOSYS;
+	}
+	return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+/**
+ *      epson1355fb_pan_display - Pans the display.
+ *      @var: frame buffer variable screen structure
+ *      @info: frame buffer structure that represents a single frame buffer
+ *
+ *	Pan (or wrap, depending on the `vmode' field) the display using the
+ *  	`xoffset' and `yoffset' fields of the `var' structure.
+ *  	If the values don't fit, return -EINVAL.
+ *
+ *      Returns negative errno on error, or zero on success.
+ */
+static int epson1355fb_pan_display(struct fb_var_screeninfo *var,
+				   struct fb_info *info)
+{
+	struct epson1355_par *par = info->par;
+	u32 start;
+
+	if (var->xoffset != 0)	/* not yet ... */
+		return -EINVAL;
+
+	if (var->yoffset + info->var.yres > info->var.yres_virtual)
+		return -EINVAL;
+
+	start = (info->fix.line_length >> 1) * var->yoffset;
+
+	epson1355_write_reg20(par, start, REG_SCRN1_DISP_START_ADDR0);
+
+	return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+static void lcd_enable(struct epson1355_par *par, int enable)
+{
+	u8 mode = epson1355_read_reg(par, REG_DISPLAY_MODE);
+
+	if (enable)
+		mode |= 1;
+	else
+		mode &= ~1;
+
+	epson1355_write_reg(par, mode, REG_DISPLAY_MODE);
+}
+
+#if defined(CONFIG_ARCH_CEIVA)
+static void backlight_enable(int enable)
+{
+	/* ### this should be protected by a spinlock ... */
+	u8 pddr = clps_readb(PDDR);
+	if (enable)
+		pddr |= (1 << 5);
+	else
+		pddr &= ~(1 << 5);
+	clps_writeb(pddr, PDDR);
+}
+#else
+static void backlight_enable(int enable)
+{
+}
+#endif
+
+
+/**
+ *      epson1355fb_blank - blanks the display.
+ *      @blank_mode: the blank mode we want.
+ *      @info: frame buffer structure that represents a single frame buffer
+ *
+ *      Blank the screen if blank_mode != 0, else unblank. 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
+ *
+ *      Returns negative errno on error, or zero on success.
+ *
+ */
+static int epson1355fb_blank(int blank_mode, struct fb_info *info)
+{
+	struct epson1355_par *par = info->par;
+
+	switch (blank_mode) {
+	case FB_BLANK_UNBLANKING:
+	case FB_BLANK_NORMAL:
+		lcd_enable(par, 1);
+		backlight_enable(1);
+		break;
+	case FB_BLANK_VSYNC_SUSPEND:
+	case FB_BLANK_HSYNC_SUSPEND:
+		backlight_enable(0);
+		break;
+	case FB_BLANK_POWERDOWN:
+		backlight_enable(0);
+		lcd_enable(par, 0);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* let fbcon do a soft blank for us */
+	return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * We can't use the cfb generic routines, as we have to limit
+ * ourselves to 16-bit or 8-bit loads and stores to this 16-bit
+ * chip.
+ */
+
+static inline void epson1355fb_fb_writel(unsigned long v, unsigned long *a)
+{
+	u16 *p = (u16 *) a;
+	u16 l = v & 0xffff;
+	u16 h = v >> 16;
+
+	fb_writew(l, p);
+	fb_writew(h, p + 1);
+}
+
+static inline unsigned long epson1355fb_fb_readl(const unsigned long *a)
+{
+	const u16 *p = (u16 *) a;
+	u16 l = fb_readw(p);
+	u16 h = fb_readw(p + 1);
+
+	return (h << 16) | l;
+}
+
+#define FB_READL epson1355fb_fb_readl
+#define FB_WRITEL epson1355fb_fb_writel
+
+/* ------------------------------------------------------------------------- */
+
+static inline unsigned long copy_from_user16(void *to, const void *from,
+					     unsigned long n)
+{
+	u16 *dst = (u16 *) to;
+	u16 *src = (u16 *) from;
+
+	if (!access_ok(VERIFY_READ, from, n))
+		return n;
+
+	while (n > 1) {
+		u16 v;
+		if (__get_user(v, src))
+			return n;
+
+		fb_writew(v, dst);
+
+		src++, dst++;
+		n -= 2;
+	}
+
+	if (n) {
+		u8 v;
+
+		if (__get_user(v, ((u8 *) src)))
+			return n;
+
+		fb_writeb(v, dst);
+	}
+	return 0;
+}
+
+static inline unsigned long copy_to_user16(void *to, const void *from,
+					   unsigned long n)
+{
+	u16 *dst = (u16 *) to;
+	u16 *src = (u16 *) from;
+
+	if (!access_ok(VERIFY_WRITE, to, n))
+		return n;
+
+	while (n > 1) {
+		u16 v = fb_readw(src);
+
+		if (__put_user(v, dst))
+			return n;
+
+		src++, dst++;
+		n -= 2;
+	}
+
+	if (n) {
+		u8 v = fb_readb(src);
+
+		if (__put_user(v, ((u8 *) dst)))
+			return n;
+	}
+	return 0;
+}
+
+
+static ssize_t
+epson1355fb_read(struct file *file, char *buf, size_t count, loff_t * ppos)
+{
+	struct inode *inode = file->f_dentry->d_inode;
+	int fbidx = iminor(inode);
+	struct fb_info *info = registered_fb[fbidx];
+	unsigned long p = *ppos;
+
+	/* from fbmem.c except for our own copy_*_user */
+	if (!info || !info->screen_base)
+		return -ENODEV;
+
+	if (p >= info->fix.smem_len)
+		return 0;
+	if (count >= info->fix.smem_len)
+		count = info->fix.smem_len;
+	if (count + p > info->fix.smem_len)
+		count = info->fix.smem_len - p;
+
+	if (count) {
+		char *base_addr;
+
+		base_addr = info->screen_base;
+		count -= copy_to_user16(buf, base_addr + p, count);
+		if (!count)
+			return -EFAULT;
+		*ppos += count;
+	}
+	return count;
+}
+
+static ssize_t
+epson1355fb_write(struct file *file, const char *buf,
+		  size_t count, loff_t * ppos)
+{
+	struct inode *inode = file->f_dentry->d_inode;
+	int fbidx = iminor(inode);
+	struct fb_info *info = registered_fb[fbidx];
+	unsigned long p = *ppos;
+	int err;
+
+	/* from fbmem.c except for our own copy_*_user */
+	if (!info || !info->screen_base)
+		return -ENODEV;
+
+	/* from fbmem.c except for our own copy_*_user */
+	if (p > info->fix.smem_len)
+		return -ENOSPC;
+	if (count >= info->fix.smem_len)
+		count = info->fix.smem_len;
+	err = 0;
+	if (count + p > info->fix.smem_len) {
+		count = info->fix.smem_len - p;
+		err = -ENOSPC;
+	}
+
+	if (count) {
+		char *base_addr;
+
+		base_addr = info->screen_base;
+		count -= copy_from_user16(base_addr + p, buf, count);
+		*ppos += count;
+		err = -EFAULT;
+	}
+	if (count)
+		return count;
+	return err;
+}
+
+/* ------------------------------------------------------------------------- */
+
+static struct fb_ops epson1355fb_fbops = {
+	.owner 		= THIS_MODULE,
+	.fb_setcolreg 	= epson1355fb_setcolreg,
+	.fb_pan_display = epson1355fb_pan_display,
+	.fb_blank 	= epson1355fb_blank,
+	.fb_fillrect 	= cfb_fillrect,
+	.fb_copyarea 	= cfb_copyarea,
+	.fb_imageblit 	= cfb_imageblit,
+	.fb_read 	= epson1355fb_read,
+	.fb_write 	= epson1355fb_write,
+	.fb_cursor 	= soft_cursor,
+};
+
+/* ------------------------------------------------------------------------- */
+
+static __init unsigned int get_fb_size(struct fb_info *info)
+{
+	unsigned int size = 2 * 1024 * 1024;
+	char *p = info->screen_base;
+
+	/* the 512k framebuffer is aliased at start + 0x80000 * n */
+	fb_writeb(1, p);
+	fb_writeb(0, p + 0x80000);
+	if (!fb_readb(p))
+		size = 512 * 1024;
+
+	fb_writeb(0, p);
+
+	return size;
+}
+
+static int epson1355_width_tab[2][4] __initdata =
+    { {4, 8, 16, -1}, {9, 12, 16, -1} };
+static int epson1355_bpp_tab[8] __initdata = { 1, 2, 4, 8, 15, 16 };
+
+static void __init fetch_hw_state(struct fb_info *info, struct epson1355_par *par)
+{
+	struct fb_var_screeninfo *var = &info->var;
+	struct fb_fix_screeninfo *fix = &info->fix;
+	u8 panel, display;
+	u16 offset;
+	u32 xres, yres;
+	u32 xres_virtual, yres_virtual;
+	int bpp, lcd_bpp;
+	int is_color, is_dual, is_tft;
+	int lcd_enabled, crt_enabled;
+
+	fix->type = FB_TYPE_PACKED_PIXELS;
+
+	display = epson1355_read_reg(par, REG_DISPLAY_MODE);
+	bpp = epson1355_bpp_tab[(display >> 2) & 7];
+
+	switch (bpp) {
+	case 8:
+		fix->visual = FB_VISUAL_PSEUDOCOLOR;
+		var->bits_per_pixel = 8;
+		var->red.offset = var->green.offset = var->blue.offset = 0;
+		var->red.length = var->green.length = var->blue.length = 8;
+		break;
+	case 16:
+		/* 5-6-5 RGB */
+		fix->visual = FB_VISUAL_TRUECOLOR;
+		var->bits_per_pixel = 16;
+		var->red.offset = 11;
+		var->red.length = 5;
+		var->green.offset = 5;
+		var->green.length = 6;
+		var->blue.offset = 0;
+		var->blue.length = 5;
+		break;
+	default:
+		BUG();
+	}
+	fb_alloc_cmap(&(info->cmap), 256, 0);
+
+	panel = epson1355_read_reg(par, REG_PANEL_TYPE);
+	is_color = (panel & 0x04) != 0;
+	is_dual = (panel & 0x02) != 0;
+	is_tft = (panel & 0x01) != 0;
+	crt_enabled = (display & 0x02) != 0;
+	lcd_enabled = (display & 0x01) != 0;
+	lcd_bpp = epson1355_width_tab[is_tft][(panel >> 4) & 3];
+
+	xres = (epson1355_read_reg(par, REG_HORZ_DISP_WIDTH) + 1) * 8;
+	yres = (epson1355_read_reg16(par, REG_VERT_DISP_HEIGHT0) + 1) *
+	    ((is_dual && !crt_enabled) ? 2 : 1);
+	offset = epson1355_read_reg16(par, REG_MEM_ADDR_OFFSET0) & 0x7ff;
+	xres_virtual = offset * 16 / bpp;
+	yres_virtual = fix->smem_len / (offset * 2);
+
+	var->xres = xres;
+	var->yres = yres;
+	var->xres_virtual = xres_virtual;
+	var->yres_virtual = yres_virtual;
+	var->xoffset = var->yoffset = 0;
+
+	fix->line_length = offset * 2;
+
+	fix->xpanstep = 0;	/* no pan yet */
+	fix->ypanstep = 1;
+	fix->ywrapstep = 0;
+	fix->accel = FB_ACCEL_NONE;
+
+	var->grayscale = !is_color;
+
+#ifdef DEBUG
+	printk(KERN_INFO
+	       "epson1355fb: xres=%d, yres=%d, "
+	       "is_color=%d, is_dual=%d, is_tft=%d\n",
+	       xres, yres, is_color, is_dual, is_tft);
+	printk(KERN_INFO
+	       "epson1355fb: bpp=%d, lcd_bpp=%d, "
+	       "crt_enabled=%d, lcd_enabled=%d\n",
+	       bpp, lcd_bpp, crt_enabled, lcd_enabled);
+#endif
+}
+
+
+static void clearfb16(struct fb_info *info)
+{
+	u16 *dst = (u16 *) info->screen_base;
+	unsigned long n = info->fix.smem_len;
+
+	while (n > 1) {
+		fb_writew(0, dst);
+		dst++, n -= 2;
+	}
+
+	if (n)
+		fb_writeb(0, dst);
+}
+
+static void epson1355fb_platform_release(struct device *device)
+{
+}
+
+static int epson1355fb_remove(struct device *device)
+{
+	struct fb_info *info = dev_get_drvdata(device);
+	struct epson1355_par *par = info->par;
+
+	backlight_enable(0);
+	if (par) {
+		lcd_enable(par, 0);
+		if (par && par->reg_addr)
+			iounmap((void *) par->reg_addr);
+	}
+
+	if (info) {
+		fb_dealloc_cmap(&info->cmap);
+		if (info->screen_base)
+			iounmap(info->screen_base);
+		framebuffer_release(info);
+	}
+	release_mem_region(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN);
+	release_mem_region(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN);
+	return 0;
+}
+
+int __init epson1355fb_probe(struct device *device)
+{
+	struct platform_device *dev = to_platform_device(device);
+	struct epson1355_par *default_par;
+	struct fb_info *info;
+	u8 revision;
+	int rc = 0;
+
+	if (!request_mem_region(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN, "S1D13505 registers")) {
+		printk(KERN_ERR "epson1355fb: unable to reserve "
+		       "registers at 0x%0x\n", EPSON1355FB_REGS_PHYS);
+		rc = -EBUSY;
+		goto bail;
+	}
+
+	if (!request_mem_region(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN,
+				"S1D13505 framebuffer")) {
+		printk(KERN_ERR "epson1355fb: unable to reserve "
+		       "framebuffer at 0x%0x\n", EPSON1355FB_FB_PHYS);
+		rc = -EBUSY;
+		goto bail;
+	}
+
+	info = framebuffer_alloc(sizeof(struct epson1355_par) + sizeof(u32) * 256, &dev->dev);
+	if (!info)
+		rc = -ENOMEM;
+		goto bail;
+
+	default_par = info->par;
+	default_par->reg_addr = (unsigned long) ioremap(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN);
+	if (!default_par->reg_addr) {
+		printk(KERN_ERR "epson1355fb: unable to map registers\n");
+		rc = -ENOMEM;
+		goto bail;
+	}
+	info->pseudo_palette = (void *)(default_par + 1);
+
+	info->screen_base = ioremap(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN);
+	if (!info->screen_base) {
+		printk(KERN_ERR "epson1355fb: unable to map framebuffer\n");
+		rc = -ENOMEM;
+		goto bail;
+	}
+
+	revision = epson1355_read_reg(default_par, REG_REVISION_CODE);
+	if ((revision >> 2) != 3) {
+		printk(KERN_INFO "epson1355fb: epson1355 not found\n");
+		rc = -ENODEV;
+		goto bail;
+	}
+
+	info->fix.mmio_start = EPSON1355FB_REGS_PHYS;
+	info->fix.mmio_len = EPSON1355FB_REGS_LEN;
+	info->fix.smem_start = EPSON1355FB_FB_PHYS;
+	info->fix.smem_len = get_fb_size(info);
+
+	printk(KERN_INFO "epson1355fb: regs mapped at 0x%lx, fb %d KiB mapped at 0x%p\n",
+	       default_par->reg_addr, info->fix.smem_len / 1024, info->screen_base);
+
+	strcpy(info->fix.id, "S1D13505");
+	info->par = default_par;
+	info->fbops = &epson1355fb_fbops;
+	info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
+
+	/* we expect the boot loader to have initialized the chip
+	   with appropriate parameters from which we can determinte
+	   the flavor of lcd panel attached */
+	fetch_hw_state(info, default_par);
+
+	/* turn this puppy on ... */
+	clearfb16(info);
+	backlight_enable(1);
+	lcd_enable(default_par, 1);
+
+	if (register_framebuffer(info) < 0) {
+		rc = -EINVAL;
+		goto bail;
+	}
+	/*
+	 * Our driver data.
+	 */
+	dev_set_drvdata(&dev->dev, info);
+
+	printk(KERN_INFO "fb%d: %s frame buffer device\n",
+	       info->node, info->fix.id);
+
+	return 0;
+
+      bail:
+	epson1355fb_remove(device);
+	return rc;
+}
+
+static struct device_driver epson1355fb_driver = {
+	.name	= "epson1355fb",
+	.bus	= &platform_bus_type,
+	.probe	= epson1355fb_probe,
+	.remove	= epson1355fb_remove,
+};
+
+static struct platform_device epson1355fb_device = {
+	.name	= "epson1355fb",
+	.id	= 0,
+	.dev	= {
+		.release = epson1355fb_platform_release,
+	}
+};
+
+int __init epson1355fb_init(void)
+{
+	int ret = 0;
+
+	if (fb_get_options("epson1355fb", NULL))
+		return -ENODEV;
+
+	ret = driver_register(&epson1355fb_driver);
+	if (!ret) {
+		ret = platform_device_register(&epson1355fb_device);
+		if (ret)
+			driver_unregister(&epson1355fb_driver);
+	}
+	return ret;
+}
+
+module_init(epson1355fb_init);
+	
+#ifdef MODULE
+static void __exit epson1355fb_exit(void)
+{
+	platform_device_unregister(&epson1355fb_device);
+	driver_unregister(&epson1355fb_driver);
+}
+
+/* ------------------------------------------------------------------------- */
+
+module_exit(epson1355fb_exit);
+#endif
+
+MODULE_AUTHOR("Christopher Hoover <ch@hpl.hp.com>");
+MODULE_DESCRIPTION("Framebuffer driver for Epson S1D13505");
+MODULE_LICENSE("GPL");
-- 
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