1/*
2 * BRIEF MODULE DESCRIPTION
3 *	Au1100 LCD Driver.
4 *
5 * Rewritten for 2.6 by Embedded Alley Solutions
6 * 	<source@embeddedalley.com>, based on submissions by
7 *  	Karl Lessard <klessard@sunrisetelecom.com>
8 *  	<c.pellegrin@exadron.com>
9 *
10 * PM support added by Rodolfo Giometti <giometti@linux.it>
11 * Cursor enable/disable by Rodolfo Giometti <giometti@linux.it>
12 *
13 * Copyright 2002 MontaVista Software
14 * Author: MontaVista Software, Inc.
15 *		ppopov@mvista.com or source@mvista.com
16 *
17 * Copyright 2002 Alchemy Semiconductor
18 * Author: Alchemy Semiconductor
19 *
20 * Based on:
21 * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
22 *  Created 28 Dec 1997 by Geert Uytterhoeven
23 *
24 *  This program is free software; you can redistribute	 it and/or modify it
25 *  under  the terms of	 the GNU General  Public License as published by the
26 *  Free Software Foundation;  either version 2 of the	License, or (at your
27 *  option) any later version.
28 *
29 *  THIS  SOFTWARE  IS PROVIDED	  ``AS	IS'' AND   ANY	EXPRESS OR IMPLIED
30 *  WARRANTIES,	  INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
31 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
32 *  NO	EVENT  SHALL   THE AUTHOR  BE	 LIABLE FOR ANY	  DIRECT, INDIRECT,
33 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
34 *  NOT LIMITED	  TO, PROCUREMENT OF  SUBSTITUTE GOODS	OR SERVICES; LOSS OF
35 *  USE, DATA,	OR PROFITS; OR	BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
36 *  ANY THEORY OF LIABILITY, WHETHER IN	 CONTRACT, STRICT LIABILITY, OR TORT
37 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
38 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 *  You should have received a copy of the  GNU General Public License along
41 *  with this program; if not, write  to the Free Software Foundation, Inc.,
42 *  675 Mass Ave, Cambridge, MA 02139, USA.
43 */
44#include <linux/clk.h>
45#include <linux/module.h>
46#include <linux/kernel.h>
47#include <linux/errno.h>
48#include <linux/string.h>
49#include <linux/mm.h>
50#include <linux/fb.h>
51#include <linux/init.h>
52#include <linux/interrupt.h>
53#include <linux/ctype.h>
54#include <linux/dma-mapping.h>
55#include <linux/platform_device.h>
56#include <linux/slab.h>
57
58#include <asm/mach-au1x00/au1000.h>
59
60#define DEBUG 0
61
62#include "au1100fb.h"
63
64#define DRIVER_NAME "au1100fb"
65#define DRIVER_DESC "LCD controller driver for AU1100 processors"
66
67#define to_au1100fb_device(_info) \
68	  (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
69
70/* Bitfields format supported by the controller. Note that the order of formats
71 * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
72 * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
73 */
74struct fb_bitfield rgb_bitfields[][4] =
75{
76  	/*     Red, 	   Green, 	 Blue, 	     Transp   */
77	{ { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
78	{ { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
79	{ { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
80	{ { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
81	{ { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
82
83	/* The last is used to describe 12bpp format */
84	{ { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
85};
86
87static struct fb_fix_screeninfo au1100fb_fix = {
88	.id		= "AU1100 FB",
89	.xpanstep 	= 1,
90	.ypanstep 	= 1,
91	.type		= FB_TYPE_PACKED_PIXELS,
92	.accel		= FB_ACCEL_NONE,
93};
94
95static struct fb_var_screeninfo au1100fb_var = {
96	.activate	= FB_ACTIVATE_NOW,
97	.height		= -1,
98	.width		= -1,
99	.vmode		= FB_VMODE_NONINTERLACED,
100};
101
102/* fb_blank
103 * Blank the screen. Depending on the mode, the screen will be
104 * activated with the backlight color, or desactivated
105 */
106static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
107{
108	struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
109
110	print_dbg("fb_blank %d %p", blank_mode, fbi);
111
112	switch (blank_mode) {
113
114	case VESA_NO_BLANKING:
115		/* Turn on panel */
116		fbdev->regs->lcd_control |= LCD_CONTROL_GO;
117		wmb(); /* drain writebuffer */
118		break;
119
120	case VESA_VSYNC_SUSPEND:
121	case VESA_HSYNC_SUSPEND:
122	case VESA_POWERDOWN:
123		/* Turn off panel */
124		fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
125		wmb(); /* drain writebuffer */
126		break;
127	default:
128		break;
129
130	}
131	return 0;
132}
133
134/*
135 * Set hardware with var settings. This will enable the controller with a specific
136 * mode, normally validated with the fb_check_var method
137	 */
138int au1100fb_setmode(struct au1100fb_device *fbdev)
139{
140	struct fb_info *info = &fbdev->info;
141	u32 words;
142	int index;
143
144	if (!fbdev)
145		return -EINVAL;
146
147	/* Update var-dependent FB info */
148	if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
149		if (info->var.bits_per_pixel <= 8) {
150			/* palettized */
151			info->var.red.offset    = 0;
152			info->var.red.length    = info->var.bits_per_pixel;
153			info->var.red.msb_right = 0;
154
155			info->var.green.offset  = 0;
156			info->var.green.length  = info->var.bits_per_pixel;
157			info->var.green.msb_right = 0;
158
159			info->var.blue.offset   = 0;
160			info->var.blue.length   = info->var.bits_per_pixel;
161			info->var.blue.msb_right = 0;
162
163			info->var.transp.offset = 0;
164			info->var.transp.length = 0;
165			info->var.transp.msb_right = 0;
166
167			info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
168			info->fix.line_length = info->var.xres_virtual /
169							(8/info->var.bits_per_pixel);
170		} else {
171			/* non-palettized */
172			index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
173			info->var.red = rgb_bitfields[index][0];
174			info->var.green = rgb_bitfields[index][1];
175			info->var.blue = rgb_bitfields[index][2];
176			info->var.transp = rgb_bitfields[index][3];
177
178			info->fix.visual = FB_VISUAL_TRUECOLOR;
179			info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
180		}
181	} else {
182		/* mono */
183		info->fix.visual = FB_VISUAL_MONO10;
184		info->fix.line_length = info->var.xres_virtual / 8;
185	}
186
187	info->screen_size = info->fix.line_length * info->var.yres_virtual;
188	info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
189				>> LCD_CONTROL_SM_BIT) * 90;
190
191	/* Determine BPP mode and format */
192	fbdev->regs->lcd_control = fbdev->panel->control_base;
193	fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
194	fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
195	fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
196	fbdev->regs->lcd_intenable = 0;
197	fbdev->regs->lcd_intstatus = 0;
198	fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
199
200	if (panel_is_dual(fbdev->panel)) {
201		/* Second panel display seconf half of screen if possible,
202		 * otherwise display the same as the first panel */
203		if (info->var.yres_virtual >= (info->var.yres << 1)) {
204			fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
205							  (info->fix.line_length *
206						          (info->var.yres_virtual >> 1)));
207		} else {
208			fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
209		}
210	}
211
212	words = info->fix.line_length / sizeof(u32);
213	if (!info->var.rotate || (info->var.rotate == 180)) {
214		words *= info->var.yres_virtual;
215		if (info->var.rotate /* 180 */) {
216			words -= (words % 8); /* should be divisable by 8 */
217		}
218	}
219	fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
220
221	fbdev->regs->lcd_pwmdiv = 0;
222	fbdev->regs->lcd_pwmhi = 0;
223
224	/* Resume controller */
225	fbdev->regs->lcd_control |= LCD_CONTROL_GO;
226	mdelay(10);
227	au1100fb_fb_blank(VESA_NO_BLANKING, info);
228
229	return 0;
230}
231
232/* fb_setcolreg
233 * Set color in LCD palette.
234 */
235int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
236{
237	struct au1100fb_device *fbdev;
238	u32 *palette;
239	u32 value;
240
241	fbdev = to_au1100fb_device(fbi);
242	palette = fbdev->regs->lcd_pallettebase;
243
244	if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
245		return -EINVAL;
246
247	if (fbi->var.grayscale) {
248		/* Convert color to grayscale */
249		red = green = blue =
250			(19595 * red + 38470 * green + 7471 * blue) >> 16;
251	}
252
253	if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
254		/* Place color in the pseudopalette */
255		if (regno > 16)
256			return -EINVAL;
257
258		palette = (u32*)fbi->pseudo_palette;
259
260		red   >>= (16 - fbi->var.red.length);
261		green >>= (16 - fbi->var.green.length);
262		blue  >>= (16 - fbi->var.blue.length);
263
264		value = (red   << fbi->var.red.offset) 	|
265			(green << fbi->var.green.offset)|
266			(blue  << fbi->var.blue.offset);
267		value &= 0xFFFF;
268
269	} else if (panel_is_active(fbdev->panel)) {
270		/* COLOR TFT PALLETTIZED (use RGB 565) */
271		value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
272		value &= 0xFFFF;
273
274	} else if (panel_is_color(fbdev->panel)) {
275		/* COLOR STN MODE */
276		value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
277			((green >> 8) & 0x00F0) |
278			(((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
279		value &= 0xFFF;
280	} else {
281		/* MONOCHROME MODE */
282		value = (green >> 12) & 0x000F;
283		value &= 0xF;
284	}
285
286	palette[regno] = value;
287
288	return 0;
289}
290
291/* fb_pan_display
292 * Pan display in x and/or y as specified
293 */
294int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
295{
296	struct au1100fb_device *fbdev;
297	int dy;
298
299	fbdev = to_au1100fb_device(fbi);
300
301	print_dbg("fb_pan_display %p %p", var, fbi);
302
303	if (!var || !fbdev) {
304		return -EINVAL;
305	}
306
307	if (var->xoffset - fbi->var.xoffset) {
308		/* No support for X panning for now! */
309		return -EINVAL;
310	}
311
312	print_dbg("fb_pan_display 2 %p %p", var, fbi);
313	dy = var->yoffset - fbi->var.yoffset;
314	if (dy) {
315
316		u32 dmaaddr;
317
318		print_dbg("Panning screen of %d lines", dy);
319
320		dmaaddr = fbdev->regs->lcd_dmaaddr0;
321		dmaaddr += (fbi->fix.line_length * dy);
322
323		/* TODO: Wait for current frame to finished */
324		fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
325
326		if (panel_is_dual(fbdev->panel)) {
327			dmaaddr = fbdev->regs->lcd_dmaaddr1;
328			dmaaddr += (fbi->fix.line_length * dy);
329			fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
330	}
331	}
332	print_dbg("fb_pan_display 3 %p %p", var, fbi);
333
334	return 0;
335}
336
337/* fb_rotate
338 * Rotate the display of this angle. This doesn't seems to be used by the core,
339 * but as our hardware supports it, so why not implementing it...
340 */
341void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
342{
343	struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
344
345	print_dbg("fb_rotate %p %d", fbi, angle);
346
347	if (fbdev && (angle > 0) && !(angle % 90)) {
348
349		fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
350
351		fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
352		fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
353
354		fbdev->regs->lcd_control |= LCD_CONTROL_GO;
355	}
356}
357
358/* fb_mmap
359 * Map video memory in user space. We don't use the generic fb_mmap method mainly
360 * to allow the use of the TLB streaming flag (CCA=6)
361 */
362int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
363{
364	struct au1100fb_device *fbdev;
365
366	fbdev = to_au1100fb_device(fbi);
367
368	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
369	pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
370
371	return vm_iomap_memory(vma, fbdev->fb_phys, fbdev->fb_len);
372}
373
374static struct fb_ops au1100fb_ops =
375{
376	.owner			= THIS_MODULE,
377	.fb_setcolreg		= au1100fb_fb_setcolreg,
378	.fb_blank		= au1100fb_fb_blank,
379	.fb_pan_display		= au1100fb_fb_pan_display,
380	.fb_fillrect		= cfb_fillrect,
381	.fb_copyarea		= cfb_copyarea,
382	.fb_imageblit		= cfb_imageblit,
383	.fb_rotate		= au1100fb_fb_rotate,
384	.fb_mmap		= au1100fb_fb_mmap,
385};
386
387
388/*-------------------------------------------------------------------------*/
389
390static int au1100fb_setup(struct au1100fb_device *fbdev)
391{
392	char *this_opt, *options;
393	int num_panels = ARRAY_SIZE(known_lcd_panels);
394
395	if (num_panels <= 0) {
396		print_err("No LCD panels supported by driver!");
397		return -ENODEV;
398	}
399
400	if (fb_get_options(DRIVER_NAME, &options))
401		return -ENODEV;
402	if (!options)
403		return -ENODEV;
404
405	while ((this_opt = strsep(&options, ",")) != NULL) {
406		/* Panel option */
407		if (!strncmp(this_opt, "panel:", 6)) {
408			int i;
409			this_opt += 6;
410			for (i = 0; i < num_panels; i++) {
411				if (!strncmp(this_opt, known_lcd_panels[i].name,
412					     strlen(this_opt))) {
413					fbdev->panel = &known_lcd_panels[i];
414					fbdev->panel_idx = i;
415					break;
416				}
417			}
418			if (i >= num_panels) {
419				print_warn("Panel '%s' not supported!", this_opt);
420				return -ENODEV;
421			}
422		}
423		/* Unsupported option */
424		else
425			print_warn("Unsupported option \"%s\"", this_opt);
426	}
427
428	print_info("Panel=%s", fbdev->panel->name);
429
430	return 0;
431}
432
433static int au1100fb_drv_probe(struct platform_device *dev)
434{
435	struct au1100fb_device *fbdev = NULL;
436	struct resource *regs_res;
437	unsigned long page;
438	struct clk *c;
439
440	/* Allocate new device private */
441	fbdev = devm_kzalloc(&dev->dev, sizeof(struct au1100fb_device),
442			     GFP_KERNEL);
443	if (!fbdev) {
444		print_err("fail to allocate device private record");
445		return -ENOMEM;
446	}
447
448	if (au1100fb_setup(fbdev))
449		goto failed;
450
451	platform_set_drvdata(dev, (void *)fbdev);
452
453	/* Allocate region for our registers and map them */
454	regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
455	if (!regs_res) {
456		print_err("fail to retrieve registers resource");
457		return -EFAULT;
458	}
459
460	au1100fb_fix.mmio_start = regs_res->start;
461	au1100fb_fix.mmio_len = resource_size(regs_res);
462
463	if (!devm_request_mem_region(&dev->dev,
464				     au1100fb_fix.mmio_start,
465				     au1100fb_fix.mmio_len,
466				     DRIVER_NAME)) {
467		print_err("fail to lock memory region at 0x%08lx",
468				au1100fb_fix.mmio_start);
469		return -EBUSY;
470	}
471
472	fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
473
474	print_dbg("Register memory map at %p", fbdev->regs);
475	print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
476
477	c = clk_get(NULL, "lcd_intclk");
478	if (!IS_ERR(c)) {
479		fbdev->lcdclk = c;
480		clk_set_rate(c, 48000000);
481		clk_prepare_enable(c);
482	}
483
484	/* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
485	fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
486		  	(fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
487
488	fbdev->fb_mem = dmam_alloc_coherent(&dev->dev,
489					    PAGE_ALIGN(fbdev->fb_len),
490					    &fbdev->fb_phys, GFP_KERNEL);
491	if (!fbdev->fb_mem) {
492		print_err("fail to allocate frambuffer (size: %dK))",
493			  fbdev->fb_len / 1024);
494		return -ENOMEM;
495	}
496
497	au1100fb_fix.smem_start = fbdev->fb_phys;
498	au1100fb_fix.smem_len = fbdev->fb_len;
499
500	/*
501	 * Set page reserved so that mmap will work. This is necessary
502	 * since we'll be remapping normal memory.
503	 */
504	for (page = (unsigned long)fbdev->fb_mem;
505	     page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
506	     page += PAGE_SIZE) {
507#ifdef CONFIG_DMA_NONCOHERENT
508		SetPageReserved(virt_to_page(CAC_ADDR((void *)page)));
509#else
510		SetPageReserved(virt_to_page(page));
511#endif
512	}
513
514	print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
515	print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
516
517	/* load the panel info into the var struct */
518	au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
519	au1100fb_var.xres = fbdev->panel->xres;
520	au1100fb_var.xres_virtual = au1100fb_var.xres;
521	au1100fb_var.yres = fbdev->panel->yres;
522	au1100fb_var.yres_virtual = au1100fb_var.yres;
523
524	fbdev->info.screen_base = fbdev->fb_mem;
525	fbdev->info.fbops = &au1100fb_ops;
526	fbdev->info.fix = au1100fb_fix;
527
528	fbdev->info.pseudo_palette =
529		devm_kzalloc(&dev->dev, sizeof(u32) * 16, GFP_KERNEL);
530	if (!fbdev->info.pseudo_palette)
531		return -ENOMEM;
532
533	if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
534		print_err("Fail to allocate colormap (%d entries)",
535			   AU1100_LCD_NBR_PALETTE_ENTRIES);
536		return -EFAULT;
537	}
538
539	fbdev->info.var = au1100fb_var;
540
541	/* Set h/w registers */
542	au1100fb_setmode(fbdev);
543
544	/* Register new framebuffer */
545	if (register_framebuffer(&fbdev->info) < 0) {
546		print_err("cannot register new framebuffer");
547		goto failed;
548	}
549
550	return 0;
551
552failed:
553	if (fbdev->lcdclk) {
554		clk_disable_unprepare(fbdev->lcdclk);
555		clk_put(fbdev->lcdclk);
556	}
557	if (fbdev->fb_mem) {
558		dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem,
559				     fbdev->fb_phys);
560	}
561	if (fbdev->info.cmap.len != 0) {
562		fb_dealloc_cmap(&fbdev->info.cmap);
563	}
564
565	return -ENODEV;
566}
567
568int au1100fb_drv_remove(struct platform_device *dev)
569{
570	struct au1100fb_device *fbdev = NULL;
571
572	if (!dev)
573		return -ENODEV;
574
575	fbdev = platform_get_drvdata(dev);
576
577#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
578	au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
579#endif
580	fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
581
582	/* Clean up all probe data */
583	unregister_framebuffer(&fbdev->info);
584
585	fb_dealloc_cmap(&fbdev->info.cmap);
586
587	if (fbdev->lcdclk) {
588		clk_disable_unprepare(fbdev->lcdclk);
589		clk_put(fbdev->lcdclk);
590	}
591
592	return 0;
593}
594
595#ifdef CONFIG_PM
596static struct au1100fb_regs fbregs;
597
598int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
599{
600	struct au1100fb_device *fbdev = platform_get_drvdata(dev);
601
602	if (!fbdev)
603		return 0;
604
605	/* Blank the LCD */
606	au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
607
608	if (fbdev->lcdclk)
609		clk_disable(fbdev->lcdclk);
610
611	memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
612
613	return 0;
614}
615
616int au1100fb_drv_resume(struct platform_device *dev)
617{
618	struct au1100fb_device *fbdev = platform_get_drvdata(dev);
619
620	if (!fbdev)
621		return 0;
622
623	memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
624
625	if (fbdev->lcdclk)
626		clk_enable(fbdev->lcdclk);
627
628	/* Unblank the LCD */
629	au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
630
631	return 0;
632}
633#else
634#define au1100fb_drv_suspend NULL
635#define au1100fb_drv_resume NULL
636#endif
637
638static struct platform_driver au1100fb_driver = {
639	.driver = {
640		.name		= "au1100-lcd",
641	},
642	.probe		= au1100fb_drv_probe,
643        .remove		= au1100fb_drv_remove,
644	.suspend	= au1100fb_drv_suspend,
645        .resume		= au1100fb_drv_resume,
646};
647module_platform_driver(au1100fb_driver);
648
649MODULE_DESCRIPTION(DRIVER_DESC);
650MODULE_LICENSE("GPL");
651