summaryrefslogtreecommitdiff
path: root/drivers/video/epson1355fb.c
blob: db9713b49ce9a8a7ebd160fa87a0d9ee68d4b58d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
/*
 * 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/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/platform_device.h>

#include <asm/types.h>
#include <asm/io.h>
#include <linux/uaccess.h>

#include <video/epson1355.h>

struct epson1355_par {
	unsigned long reg_addr;
	u32 pseudo_palette[16];
};

/* ------------------------------------------------------------------------- */

#if defined(CONFIG_ARM)

# ifdef CONFIG_ARCH_CEIVA
#  include <mach/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_UNBLANK:
	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 fb_info *info, char *buf, size_t count, loff_t * ppos)
{
	unsigned long p = *ppos;

	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 fb_info *info, const char *buf,
		  size_t count, loff_t * ppos)
{
	unsigned long p = *ppos;
	int err;

	/* 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,
};

/* ------------------------------------------------------------------------- */

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 int epson1355fb_remove(struct platform_device *dev)
{
	struct fb_info *info = platform_get_drvdata(dev);
	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 __devinit epson1355fb_probe(struct platform_device *dev)
{
	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), &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 = default_par->pseudo_palette;

	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.
	 */
	platform_set_drvdata(dev, info);

	printk(KERN_INFO "fb%d: %s frame buffer device\n",
	       info->node, info->fix.id);

	return 0;

      bail:
	epson1355fb_remove(dev);
	return rc;
}

static struct platform_driver epson1355fb_driver = {
	.probe	= epson1355fb_probe,
	.remove	= epson1355fb_remove,
	.driver	= {
		.name	= "epson1355fb",
	},
};

static struct platform_device *epson1355fb_device;

int __init epson1355fb_init(void)
{
	int ret = 0;

	if (fb_get_options("epson1355fb", NULL))
		return -ENODEV;

	ret = platform_driver_register(&epson1355fb_driver);

	if (!ret) {
		epson1355fb_device = platform_device_alloc("epson1355fb", 0);

		if (epson1355fb_device)
			ret = platform_device_add(epson1355fb_device);
		else
			ret = -ENOMEM;

		if (ret) {
			platform_device_put(epson1355fb_device);
			platform_driver_unregister(&epson1355fb_driver);
		}
	}

	return ret;
}

module_init(epson1355fb_init);
	
#ifdef MODULE
static void __exit epson1355fb_exit(void)
{
	platform_device_unregister(epson1355fb_device);
	platform_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");