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/module.h>
45#include <linux/kernel.h>
46#include <linux/errno.h>
47#include <linux/string.h>
48#include <linux/mm.h>
49#include <linux/fb.h>
50#include <linux/init.h>
51#include <linux/interrupt.h>
52#include <linux/ctype.h>
53#include <linux/dma-mapping.h>
54#include <linux/platform_device.h>
55
56#include <asm/mach-au1x00/au1000.h>
57
58#define DEBUG 0
59
60#include "au1100fb.h"
61
62/*
63 * Sanity check. If this is a new Au1100 based board, search for
64 * the PB1100 ifdefs to make sure you modify the code accordingly.
65 */
66#if defined(CONFIG_MIPS_PB1100)
67  #include <asm/mach-pb1x00/pb1100.h>
68#elif defined(CONFIG_MIPS_DB1100)
69  #include <asm/mach-db1x00/db1x00.h>
70#else
71  #error "Unknown Au1100 board, Au1100 FB driver not supported"
72#endif
73
74#define DRIVER_NAME "au1100fb"
75#define DRIVER_DESC "LCD controller driver for AU1100 processors"
76
77#define to_au1100fb_device(_info) \
78	  (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
79
80/* Bitfields format supported by the controller. Note that the order of formats
81 * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
82 * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
83 */
84struct fb_bitfield rgb_bitfields[][4] =
85{
86  	/*     Red, 	   Green, 	 Blue, 	     Transp   */
87	{ { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
88	{ { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
89	{ { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
90	{ { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
91	{ { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
92
93	/* The last is used to describe 12bpp format */
94	{ { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
95};
96
97static struct fb_fix_screeninfo au1100fb_fix __initdata = {
98	.id		= "AU1100 FB",
99	.xpanstep 	= 1,
100	.ypanstep 	= 1,
101	.type		= FB_TYPE_PACKED_PIXELS,
102	.accel		= FB_ACCEL_NONE,
103};
104
105static struct fb_var_screeninfo au1100fb_var __initdata = {
106	.activate	= FB_ACTIVATE_NOW,
107	.height		= -1,
108	.width		= -1,
109	.vmode		= FB_VMODE_NONINTERLACED,
110};
111
112static struct au1100fb_drv_info drv_info;
113
114static int nocursor = 0;
115module_param(nocursor, int, 0644);
116MODULE_PARM_DESC(nocursor, "cursor enable/disable");
117
118/*
119 * Set hardware with var settings. This will enable the controller with a specific
120 * mode, normally validated with the fb_check_var method
121	 */
122int au1100fb_setmode(struct au1100fb_device *fbdev)
123{
124	struct fb_info *info = &fbdev->info;
125	u32 words;
126	int index;
127
128	if (!fbdev)
129		return -EINVAL;
130
131	/* Update var-dependent FB info */
132	if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
133		if (info->var.bits_per_pixel <= 8) {
134			/* palettized */
135			info->var.red.offset    = 0;
136			info->var.red.length    = info->var.bits_per_pixel;
137			info->var.red.msb_right = 0;
138
139			info->var.green.offset  = 0;
140			info->var.green.length  = info->var.bits_per_pixel;
141			info->var.green.msb_right = 0;
142
143			info->var.blue.offset   = 0;
144			info->var.blue.length   = info->var.bits_per_pixel;
145			info->var.blue.msb_right = 0;
146
147			info->var.transp.offset = 0;
148			info->var.transp.length = 0;
149			info->var.transp.msb_right = 0;
150
151			info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
152			info->fix.line_length = info->var.xres_virtual /
153							(8/info->var.bits_per_pixel);
154		} else {
155			/* non-palettized */
156			index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
157			info->var.red = rgb_bitfields[index][0];
158			info->var.green = rgb_bitfields[index][1];
159			info->var.blue = rgb_bitfields[index][2];
160			info->var.transp = rgb_bitfields[index][3];
161
162			info->fix.visual = FB_VISUAL_TRUECOLOR;
163			info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
164		}
165	} else {
166		/* mono */
167		info->fix.visual = FB_VISUAL_MONO10;
168		info->fix.line_length = info->var.xres_virtual / 8;
169	}
170
171	info->screen_size = info->fix.line_length * info->var.yres_virtual;
172	info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
173				>> LCD_CONTROL_SM_BIT) * 90;
174
175	/* Determine BPP mode and format */
176	fbdev->regs->lcd_control = fbdev->panel->control_base;
177	fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
178	fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
179	fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
180	fbdev->regs->lcd_intenable = 0;
181	fbdev->regs->lcd_intstatus = 0;
182	fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
183
184	if (panel_is_dual(fbdev->panel)) {
185		/* Second panel display seconf half of screen if possible,
186		 * otherwise display the same as the first panel */
187		if (info->var.yres_virtual >= (info->var.yres << 1)) {
188			fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
189							  (info->fix.line_length *
190						          (info->var.yres_virtual >> 1)));
191		} else {
192			fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
193		}
194	}
195
196	words = info->fix.line_length / sizeof(u32);
197	if (!info->var.rotate || (info->var.rotate == 180)) {
198		words *= info->var.yres_virtual;
199		if (info->var.rotate /* 180 */) {
200			words -= (words % 8); /* should be divisable by 8 */
201		}
202	}
203	fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
204
205	fbdev->regs->lcd_pwmdiv = 0;
206	fbdev->regs->lcd_pwmhi = 0;
207
208	/* Resume controller */
209	fbdev->regs->lcd_control |= LCD_CONTROL_GO;
210	mdelay(10);
211	au1100fb_fb_blank(VESA_NO_BLANKING, info);
212
213	return 0;
214}
215
216/* fb_setcolreg
217 * Set color in LCD palette.
218 */
219int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
220{
221	struct au1100fb_device *fbdev;
222	u32 *palette;
223	u32 value;
224
225	fbdev = to_au1100fb_device(fbi);
226	palette = fbdev->regs->lcd_pallettebase;
227
228	if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
229		return -EINVAL;
230
231	if (fbi->var.grayscale) {
232		/* Convert color to grayscale */
233		red = green = blue =
234			(19595 * red + 38470 * green + 7471 * blue) >> 16;
235	}
236
237	if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
238		/* Place color in the pseudopalette */
239		if (regno > 16)
240			return -EINVAL;
241
242		palette = (u32*)fbi->pseudo_palette;
243
244		red   >>= (16 - fbi->var.red.length);
245		green >>= (16 - fbi->var.green.length);
246		blue  >>= (16 - fbi->var.blue.length);
247
248		value = (red   << fbi->var.red.offset) 	|
249			(green << fbi->var.green.offset)|
250			(blue  << fbi->var.blue.offset);
251		value &= 0xFFFF;
252
253	} else if (panel_is_active(fbdev->panel)) {
254		/* COLOR TFT PALLETTIZED (use RGB 565) */
255		value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
256		value &= 0xFFFF;
257
258	} else if (panel_is_color(fbdev->panel)) {
259		/* COLOR STN MODE */
260		value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
261			((green >> 8) & 0x00F0) |
262			(((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
263		value &= 0xFFF;
264	} else {
265		/* MONOCHROME MODE */
266		value = (green >> 12) & 0x000F;
267		value &= 0xF;
268	}
269
270	palette[regno] = value;
271
272	return 0;
273}
274
275/* fb_blank
276 * Blank the screen. Depending on the mode, the screen will be
277 * activated with the backlight color, or desactivated
278 */
279int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
280{
281	struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
282
283	print_dbg("fb_blank %d %p", blank_mode, fbi);
284
285	switch (blank_mode) {
286
287	case VESA_NO_BLANKING:
288			/* Turn on panel */
289			fbdev->regs->lcd_control |= LCD_CONTROL_GO;
290#ifdef CONFIG_MIPS_PB1100
291			if (drv_info.panel_idx == 1) {
292				au_writew(au_readw(PB1100_G_CONTROL)
293					  | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
294			PB1100_G_CONTROL);
295			}
296#endif
297		au_sync();
298		break;
299
300	case VESA_VSYNC_SUSPEND:
301	case VESA_HSYNC_SUSPEND:
302	case VESA_POWERDOWN:
303			/* Turn off panel */
304			fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
305#ifdef CONFIG_MIPS_PB1100
306			if (drv_info.panel_idx == 1) {
307				au_writew(au_readw(PB1100_G_CONTROL)
308				  	  & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
309			PB1100_G_CONTROL);
310			}
311#endif
312		au_sync();
313		break;
314	default:
315		break;
316
317	}
318	return 0;
319}
320
321/* fb_pan_display
322 * Pan display in x and/or y as specified
323 */
324int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
325{
326	struct au1100fb_device *fbdev;
327	int dy;
328
329	fbdev = to_au1100fb_device(fbi);
330
331	print_dbg("fb_pan_display %p %p", var, fbi);
332
333	if (!var || !fbdev) {
334		return -EINVAL;
335	}
336
337	if (var->xoffset - fbi->var.xoffset) {
338		/* No support for X panning for now! */
339		return -EINVAL;
340	}
341
342	print_dbg("fb_pan_display 2 %p %p", var, fbi);
343	dy = var->yoffset - fbi->var.yoffset;
344	if (dy) {
345
346		u32 dmaaddr;
347
348		print_dbg("Panning screen of %d lines", dy);
349
350		dmaaddr = fbdev->regs->lcd_dmaaddr0;
351		dmaaddr += (fbi->fix.line_length * dy);
352
353		/* TODO: Wait for current frame to finished */
354		fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
355
356		if (panel_is_dual(fbdev->panel)) {
357			dmaaddr = fbdev->regs->lcd_dmaaddr1;
358			dmaaddr += (fbi->fix.line_length * dy);
359			fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
360	}
361	}
362	print_dbg("fb_pan_display 3 %p %p", var, fbi);
363
364	return 0;
365}
366
367/* fb_rotate
368 * Rotate the display of this angle. This doesn't seems to be used by the core,
369 * but as our hardware supports it, so why not implementing it...
370 */
371void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
372{
373	struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
374
375	print_dbg("fb_rotate %p %d", fbi, angle);
376
377	if (fbdev && (angle > 0) && !(angle % 90)) {
378
379		fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
380
381		fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
382		fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
383
384		fbdev->regs->lcd_control |= LCD_CONTROL_GO;
385	}
386}
387
388/* fb_mmap
389 * Map video memory in user space. We don't use the generic fb_mmap method mainly
390 * to allow the use of the TLB streaming flag (CCA=6)
391 */
392int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
393{
394	struct au1100fb_device *fbdev;
395	unsigned int len;
396	unsigned long start=0, off;
397
398	fbdev = to_au1100fb_device(fbi);
399
400	if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
401		return -EINVAL;
402	}
403
404	start = fbdev->fb_phys & PAGE_MASK;
405	len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
406
407	off = vma->vm_pgoff << PAGE_SHIFT;
408
409	if ((vma->vm_end - vma->vm_start + off) > len) {
410		return -EINVAL;
411	}
412
413	off += start;
414	vma->vm_pgoff = off >> PAGE_SHIFT;
415
416	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
417	pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
418
419	vma->vm_flags |= VM_IO;
420
421	if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
422				vma->vm_end - vma->vm_start,
423				vma->vm_page_prot)) {
424		return -EAGAIN;
425	}
426
427	return 0;
428}
429
430/* fb_cursor
431 * Used to disable cursor drawing...
432 */
433int au1100fb_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
434{
435	if (nocursor)
436		return 0;
437	else
438		return -EINVAL;	/* just to force soft_cursor() call */
439}
440
441static struct fb_ops au1100fb_ops =
442{
443	.owner			= THIS_MODULE,
444	.fb_setcolreg		= au1100fb_fb_setcolreg,
445	.fb_blank		= au1100fb_fb_blank,
446	.fb_pan_display		= au1100fb_fb_pan_display,
447	.fb_fillrect		= cfb_fillrect,
448	.fb_copyarea		= cfb_copyarea,
449	.fb_imageblit		= cfb_imageblit,
450	.fb_rotate		= au1100fb_fb_rotate,
451	.fb_mmap		= au1100fb_fb_mmap,
452	.fb_cursor		= au1100fb_fb_cursor,
453};
454
455
456/*-------------------------------------------------------------------------*/
457
458/* AU1100 LCD controller device driver */
459
460int au1100fb_drv_probe(struct device *dev)
461{
462	struct au1100fb_device *fbdev = NULL;
463	struct resource *regs_res;
464	unsigned long page;
465	u32 sys_clksrc;
466
467	if (!dev)
468			return -EINVAL;
469
470	/* Allocate new device private */
471	if (!(fbdev = kzalloc(sizeof(struct au1100fb_device), GFP_KERNEL))) {
472		print_err("fail to allocate device private record");
473		return -ENOMEM;
474	}
475
476	fbdev->panel = &known_lcd_panels[drv_info.panel_idx];
477
478	dev_set_drvdata(dev, (void*)fbdev);
479
480	/* Allocate region for our registers and map them */
481	if (!(regs_res = platform_get_resource(to_platform_device(dev),
482					IORESOURCE_MEM, 0))) {
483		print_err("fail to retrieve registers resource");
484		return -EFAULT;
485	}
486
487	au1100fb_fix.mmio_start = regs_res->start;
488	au1100fb_fix.mmio_len = regs_res->end - regs_res->start + 1;
489
490	if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
491				DRIVER_NAME)) {
492		print_err("fail to lock memory region at 0x%08lx",
493				au1100fb_fix.mmio_start);
494		return -EBUSY;
495	}
496
497	fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
498
499	print_dbg("Register memory map at %p", fbdev->regs);
500	print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
501
502
503
504	/* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
505	fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
506		  	(fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
507
508	fbdev->fb_mem = dma_alloc_coherent(dev, PAGE_ALIGN(fbdev->fb_len),
509					&fbdev->fb_phys, GFP_KERNEL);
510	if (!fbdev->fb_mem) {
511		print_err("fail to allocate frambuffer (size: %dK))",
512			  fbdev->fb_len / 1024);
513		return -ENOMEM;
514	}
515
516	au1100fb_fix.smem_start = fbdev->fb_phys;
517	au1100fb_fix.smem_len = fbdev->fb_len;
518
519	/*
520	 * Set page reserved so that mmap will work. This is necessary
521	 * since we'll be remapping normal memory.
522	 */
523	for (page = (unsigned long)fbdev->fb_mem;
524	     page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
525	     page += PAGE_SIZE) {
526#if CONFIG_DMA_NONCOHERENT
527		SetPageReserved(virt_to_page(CAC_ADDR(page)));
528#else
529		SetPageReserved(virt_to_page(page));
530#endif
531	}
532
533	print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
534	print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
535
536	/* Setup LCD clock to AUX (48 MHz) */
537	sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
538	au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
539
540	/* load the panel info into the var struct */
541	au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
542	au1100fb_var.xres = fbdev->panel->xres;
543	au1100fb_var.xres_virtual = au1100fb_var.xres;
544	au1100fb_var.yres = fbdev->panel->yres;
545	au1100fb_var.yres_virtual = au1100fb_var.yres;
546
547	fbdev->info.screen_base = fbdev->fb_mem;
548	fbdev->info.fbops = &au1100fb_ops;
549	fbdev->info.fix = au1100fb_fix;
550
551	if (!(fbdev->info.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL))) {
552		return -ENOMEM;
553	}
554
555	if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
556		print_err("Fail to allocate colormap (%d entries)",
557			   AU1100_LCD_NBR_PALETTE_ENTRIES);
558		kfree(fbdev->info.pseudo_palette);
559		return -EFAULT;
560	}
561
562	fbdev->info.var = au1100fb_var;
563
564	/* Set h/w registers */
565	au1100fb_setmode(fbdev);
566
567	/* Register new framebuffer */
568	if (register_framebuffer(&fbdev->info) < 0) {
569		print_err("cannot register new framebuffer");
570		goto failed;
571	}
572
573	return 0;
574
575failed:
576	if (fbdev->regs) {
577		release_mem_region(fbdev->regs_phys, fbdev->regs_len);
578	}
579	if (fbdev->fb_mem) {
580		dma_free_noncoherent(dev, fbdev->fb_len, fbdev->fb_mem, fbdev->fb_phys);
581	}
582	if (fbdev->info.cmap.len != 0) {
583		fb_dealloc_cmap(&fbdev->info.cmap);
584	}
585	kfree(fbdev);
586	dev_set_drvdata(dev, NULL);
587
588	return 0;
589}
590
591int au1100fb_drv_remove(struct device *dev)
592{
593	struct au1100fb_device *fbdev = NULL;
594
595	if (!dev)
596		return -ENODEV;
597
598	fbdev = (struct au1100fb_device*) dev_get_drvdata(dev);
599
600#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
601	au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
602#endif
603	fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
604
605	/* Clean up all probe data */
606	unregister_framebuffer(&fbdev->info);
607
608	release_mem_region(fbdev->regs_phys, fbdev->regs_len);
609
610	dma_free_coherent(dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem, fbdev->fb_phys);
611
612	fb_dealloc_cmap(&fbdev->info.cmap);
613	kfree(fbdev->info.pseudo_palette);
614	kfree((void*)fbdev);
615
616	return 0;
617}
618
619#ifdef CONFIG_PM
620static u32 sys_clksrc;
621static struct au1100fb_regs fbregs;
622
623int au1100fb_drv_suspend(struct device *dev, pm_message_t state)
624{
625	struct au1100fb_device *fbdev = dev_get_drvdata(dev);
626
627	if (!fbdev)
628		return 0;
629
630	/* Save the clock source state */
631	sys_clksrc = au_readl(SYS_CLKSRC);
632
633	/* Blank the LCD */
634	au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
635
636	/* Stop LCD clocking */
637	au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
638
639	memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
640
641	return 0;
642}
643
644int au1100fb_drv_resume(struct device *dev)
645{
646	struct au1100fb_device *fbdev = dev_get_drvdata(dev);
647
648	if (!fbdev)
649		return 0;
650
651	memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
652
653	/* Restart LCD clocking */
654	au_writel(sys_clksrc, SYS_CLKSRC);
655
656	/* Unblank the LCD */
657	au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
658
659	return 0;
660}
661#else
662#define au1100fb_drv_suspend NULL
663#define au1100fb_drv_resume NULL
664#endif
665
666static struct device_driver au1100fb_driver = {
667	.name		= "au1100-lcd",
668	.bus		= &platform_bus_type,
669
670	.probe		= au1100fb_drv_probe,
671        .remove		= au1100fb_drv_remove,
672	.suspend	= au1100fb_drv_suspend,
673        .resume		= au1100fb_drv_resume,
674};
675
676/*-------------------------------------------------------------------------*/
677
678/* Kernel driver */
679
680int au1100fb_setup(char *options)
681{
682	char* this_opt;
683	int num_panels = ARRAY_SIZE(known_lcd_panels);
684	char* mode = NULL;
685	int panel_idx = 0;
686
687	if (num_panels <= 0) {
688		print_err("No LCD panels supported by driver!");
689		return -EFAULT;
690			}
691
692	if (options) {
693		while ((this_opt = strsep(&options,",")) != NULL) {
694			/* Panel option */
695			if (!strncmp(this_opt, "panel:", 6)) {
696				int i;
697				this_opt += 6;
698				for (i = 0; i < num_panels; i++) {
699					if (!strncmp(this_opt,
700					      	     known_lcd_panels[i].name,
701							strlen(this_opt))) {
702						panel_idx = i;
703						break;
704					}
705				}
706				if (i >= num_panels) {
707 					print_warn("Panel %s not supported!", this_opt);
708				}
709			}
710			if (!strncmp(this_opt, "nocursor", 8)) {
711				this_opt += 8;
712				nocursor = 1;
713				print_info("Cursor disabled");
714			}
715			/* Mode option (only option that start with digit) */
716			else if (isdigit(this_opt[0])) {
717				mode = kmalloc(strlen(this_opt) + 1, GFP_KERNEL);
718				strncpy(mode, this_opt, strlen(this_opt) + 1);
719			}
720			/* Unsupported option */
721			else {
722				print_warn("Unsupported option \"%s\"", this_opt);
723			}
724		}
725	}
726
727	drv_info.panel_idx = panel_idx;
728	drv_info.opt_mode = mode;
729
730	print_info("Panel=%s Mode=%s",
731			known_lcd_panels[drv_info.panel_idx].name,
732		      	drv_info.opt_mode ? drv_info.opt_mode : "default");
733
734	return 0;
735}
736
737int __init au1100fb_init(void)
738{
739	char* options;
740	int ret;
741
742	print_info("" DRIVER_DESC "");
743
744	memset(&drv_info, 0, sizeof(drv_info));
745
746	if (fb_get_options(DRIVER_NAME, &options))
747		return -ENODEV;
748
749	/* Setup driver with options */
750	ret = au1100fb_setup(options);
751	if (ret < 0) {
752		print_err("Fail to setup driver");
753		return ret;
754	}
755
756	return driver_register(&au1100fb_driver);
757}
758
759void __exit au1100fb_cleanup(void)
760{
761	driver_unregister(&au1100fb_driver);
762
763	kfree(drv_info.opt_mode);
764}
765
766module_init(au1100fb_init);
767module_exit(au1100fb_cleanup);
768
769MODULE_DESCRIPTION(DRIVER_DESC);
770MODULE_LICENSE("GPL");
771