Merge master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
[linux-2.6] / drivers / video / au1100fb.c
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  *
12  * Copyright 2002 MontaVista Software
13  * Author: MontaVista Software, Inc.
14  *              ppopov@mvista.com or source@mvista.com
15  *
16  * Copyright 2002 Alchemy Semiconductor
17  * Author: Alchemy Semiconductor
18  *
19  * Based on:
20  * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
21  *  Created 28 Dec 1997 by Geert Uytterhoeven
22  *
23  *  This program is free software; you can redistribute  it and/or modify it
24  *  under  the terms of  the GNU General  Public License as published by the
25  *  Free Software Foundation;  either version 2 of the  License, or (at your
26  *  option) any later version.
27  *
28  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
29  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
30  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
31  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
32  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
33  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
34  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
35  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
36  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
37  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38  *
39  *  You should have received a copy of the  GNU General Public License along
40  *  with this program; if not, write  to the Free Software Foundation, Inc.,
41  *  675 Mass Ave, Cambridge, MA 02139, USA.
42  */
43 #include <linux/config.h>
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  */
84 struct 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
97 static 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
105 static 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
112 static struct au1100fb_drv_info drv_info;
113
114 /*
115  * Set hardware with var settings. This will enable the controller with a specific
116  * mode, normally validated with the fb_check_var method
117          */
118 int au1100fb_setmode(struct au1100fb_device *fbdev)
119 {
120         struct fb_info *info = &fbdev->info;
121         u32 words;
122         int index;
123
124         if (!fbdev)
125                 return -EINVAL;
126
127         /* Update var-dependent FB info */
128         if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
129                 if (info->var.bits_per_pixel <= 8) {
130                         /* palettized */
131                         info->var.red.offset    = 0;
132                         info->var.red.length    = info->var.bits_per_pixel;
133                         info->var.red.msb_right = 0;
134
135                         info->var.green.offset  = 0;
136                         info->var.green.length  = info->var.bits_per_pixel;
137                         info->var.green.msb_right = 0;
138
139                         info->var.blue.offset   = 0;
140                         info->var.blue.length   = info->var.bits_per_pixel;
141                         info->var.blue.msb_right = 0;
142
143                         info->var.transp.offset = 0;
144                         info->var.transp.length = 0;
145                         info->var.transp.msb_right = 0;
146
147                         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
148                         info->fix.line_length = info->var.xres_virtual /
149                                                         (8/info->var.bits_per_pixel);
150                 } else {
151                         /* non-palettized */
152                         index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
153                         info->var.red = rgb_bitfields[index][0];
154                         info->var.green = rgb_bitfields[index][1];
155                         info->var.blue = rgb_bitfields[index][2];
156                         info->var.transp = rgb_bitfields[index][3];
157
158                         info->fix.visual = FB_VISUAL_TRUECOLOR;
159                         info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
160         }
161         } else {
162                 /* mono */
163                 info->fix.visual = FB_VISUAL_MONO10;
164                 info->fix.line_length = info->var.xres_virtual / 8;
165         }
166
167         info->screen_size = info->fix.line_length * info->var.yres_virtual;
168
169         /* Determine BPP mode and format */
170         fbdev->regs->lcd_control = fbdev->panel->control_base |
171                             ((info->var.rotate/90) << LCD_CONTROL_SM_BIT);
172
173         fbdev->regs->lcd_intenable = 0;
174         fbdev->regs->lcd_intstatus = 0;
175
176         fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
177
178         fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
179
180         fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
181
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
211         return 0;
212 }
213
214 /* fb_setcolreg
215  * Set color in LCD palette.
216  */
217 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
218 {
219         struct au1100fb_device *fbdev;
220         u32 *palette;
221         u32 value;
222
223         fbdev = to_au1100fb_device(fbi);
224         palette = fbdev->regs->lcd_pallettebase;
225
226         if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
227                 return -EINVAL;
228
229         if (fbi->var.grayscale) {
230                 /* Convert color to grayscale */
231                 red = green = blue =
232                         (19595 * red + 38470 * green + 7471 * blue) >> 16;
233         }
234
235         if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
236                 /* Place color in the pseudopalette */
237                 if (regno > 16)
238                         return -EINVAL;
239
240                 palette = (u32*)fbi->pseudo_palette;
241
242                 red   >>= (16 - fbi->var.red.length);
243                 green >>= (16 - fbi->var.green.length);
244                 blue  >>= (16 - fbi->var.blue.length);
245
246                 value = (red   << fbi->var.red.offset)  |
247                         (green << fbi->var.green.offset)|
248                         (blue  << fbi->var.blue.offset);
249                 value &= 0xFFFF;
250
251         } else if (panel_is_active(fbdev->panel)) {
252                 /* COLOR TFT PALLETTIZED (use RGB 565) */
253                 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
254                 value &= 0xFFFF;
255
256         } else if (panel_is_color(fbdev->panel)) {
257                 /* COLOR STN MODE */
258                 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
259                         ((green >> 8) & 0x00F0) |
260                         (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
261                 value &= 0xFFF;
262         } else {
263                 /* MONOCHROME MODE */
264                 value = (green >> 12) & 0x000F;
265                 value &= 0xF;
266         }
267
268         palette[regno] = value;
269
270         return 0;
271 }
272
273 /* fb_blank
274  * Blank the screen. Depending on the mode, the screen will be
275  * activated with the backlight color, or desactivated
276  */
277 int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
278 {
279         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
280
281         print_dbg("fb_blank %d %p", blank_mode, fbi);
282
283         switch (blank_mode) {
284
285         case VESA_NO_BLANKING:
286                         /* Turn on panel */
287                         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
288 #ifdef CONFIG_MIPS_PB1100
289                         if (drv_info.panel_idx == 1) {
290                                 au_writew(au_readw(PB1100_G_CONTROL)
291                                           | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
292                         PB1100_G_CONTROL);
293                         }
294 #endif
295                 au_sync();
296                 break;
297
298         case VESA_VSYNC_SUSPEND:
299         case VESA_HSYNC_SUSPEND:
300         case VESA_POWERDOWN:
301                         /* Turn off panel */
302                         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
303 #ifdef CONFIG_MIPS_PB1100
304                         if (drv_info.panel_idx == 1) {
305                                 au_writew(au_readw(PB1100_G_CONTROL)
306                                           & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
307                         PB1100_G_CONTROL);
308                         }
309 #endif
310                 au_sync();
311                 break;
312         default:
313                 break;
314
315         }
316         return 0;
317 }
318
319 /* fb_pan_display
320  * Pan display in x and/or y as specified
321  */
322 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
323 {
324         struct au1100fb_device *fbdev;
325         int dy;
326
327         fbdev = to_au1100fb_device(fbi);
328
329         print_dbg("fb_pan_display %p %p", var, fbi);
330
331         if (!var || !fbdev) {
332                 return -EINVAL;
333         }
334
335         if (var->xoffset - fbi->var.xoffset) {
336                 /* No support for X panning for now! */
337                 return -EINVAL;
338         }
339
340         print_dbg("fb_pan_display 2 %p %p", var, fbi);
341         dy = var->yoffset - fbi->var.yoffset;
342         if (dy) {
343
344                 u32 dmaaddr;
345
346                 print_dbg("Panning screen of %d lines", dy);
347
348                 dmaaddr = fbdev->regs->lcd_dmaaddr0;
349                 dmaaddr += (fbi->fix.line_length * dy);
350
351                 /* TODO: Wait for current frame to finished */
352                 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
353
354                 if (panel_is_dual(fbdev->panel)) {
355                         dmaaddr = fbdev->regs->lcd_dmaaddr1;
356                         dmaaddr += (fbi->fix.line_length * dy);
357                         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
358         }
359         }
360         print_dbg("fb_pan_display 3 %p %p", var, fbi);
361
362         return 0;
363 }
364
365 /* fb_rotate
366  * Rotate the display of this angle. This doesn't seems to be used by the core,
367  * but as our hardware supports it, so why not implementing it...
368  */
369 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
370 {
371         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
372
373         print_dbg("fb_rotate %p %d", fbi, angle);
374
375         if (fbdev && (angle > 0) && !(angle % 90)) {
376
377                 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
378
379                 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
380                 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
381
382                 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
383         }
384 }
385
386 /* fb_mmap
387  * Map video memory in user space. We don't use the generic fb_mmap method mainly
388  * to allow the use of the TLB streaming flag (CCA=6)
389  */
390 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
391 {
392         struct au1100fb_device *fbdev;
393         unsigned int len;
394         unsigned long start=0, off;
395
396         fbdev = to_au1100fb_device(fbi);
397
398         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
399                 return -EINVAL;
400         }
401
402         start = fbdev->fb_phys & PAGE_MASK;
403         len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
404
405         off = vma->vm_pgoff << PAGE_SHIFT;
406
407         if ((vma->vm_end - vma->vm_start + off) > len) {
408                 return -EINVAL;
409         }
410
411         off += start;
412         vma->vm_pgoff = off >> PAGE_SHIFT;
413
414         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
415         pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
416
417         vma->vm_flags |= VM_IO;
418
419         if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
420                                 vma->vm_end - vma->vm_start,
421                                 vma->vm_page_prot)) {
422                 return -EAGAIN;
423         }
424
425         return 0;
426 }
427
428 static struct fb_ops au1100fb_ops =
429 {
430         .owner                  = THIS_MODULE,
431         .fb_setcolreg           = au1100fb_fb_setcolreg,
432         .fb_blank               = au1100fb_fb_blank,
433         .fb_pan_display         = au1100fb_fb_pan_display,
434         .fb_fillrect            = cfb_fillrect,
435         .fb_copyarea            = cfb_copyarea,
436         .fb_imageblit           = cfb_imageblit,
437         .fb_rotate              = au1100fb_fb_rotate,
438         .fb_mmap                = au1100fb_fb_mmap,
439 };
440
441
442 /*-------------------------------------------------------------------------*/
443
444 /* AU1100 LCD controller device driver */
445
446 int au1100fb_drv_probe(struct device *dev)
447 {
448         struct au1100fb_device *fbdev = NULL;
449         struct resource *regs_res;
450         unsigned long page;
451         u32 sys_clksrc;
452
453         if (!dev)
454                         return -EINVAL;
455
456         /* Allocate new device private */
457         if (!(fbdev = kmalloc(sizeof(struct au1100fb_device), GFP_KERNEL))) {
458                 print_err("fail to allocate device private record");
459                 return -ENOMEM;
460         }
461         memset((void*)fbdev, 0, sizeof(struct au1100fb_device));
462
463         fbdev->panel = &known_lcd_panels[drv_info.panel_idx];
464
465         dev_set_drvdata(dev, (void*)fbdev);
466
467         /* Allocate region for our registers and map them */
468         if (!(regs_res = platform_get_resource(to_platform_device(dev),
469                                         IORESOURCE_MEM, 0))) {
470                 print_err("fail to retrieve registers resource");
471                 return -EFAULT;
472         }
473
474         au1100fb_fix.mmio_start = regs_res->start;
475         au1100fb_fix.mmio_len = regs_res->end - regs_res->start + 1;
476
477         if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
478                                 DRIVER_NAME)) {
479                 print_err("fail to lock memory region at 0x%08lx",
480                                 au1100fb_fix.mmio_start);
481                 return -EBUSY;
482         }
483
484         fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
485
486         print_dbg("Register memory map at %p", fbdev->regs);
487         print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
488
489
490
491         /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
492         fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
493                         (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
494
495         fbdev->fb_mem = dma_alloc_coherent(dev, PAGE_ALIGN(fbdev->fb_len),
496                                         &fbdev->fb_phys, GFP_KERNEL);
497         if (!fbdev->fb_mem) {
498                 print_err("fail to allocate frambuffer (size: %dK))",
499                           fbdev->fb_len / 1024);
500                 return -ENOMEM;
501         }
502
503         au1100fb_fix.smem_start = fbdev->fb_phys;
504         au1100fb_fix.smem_len = fbdev->fb_len;
505
506         /*
507          * Set page reserved so that mmap will work. This is necessary
508          * since we'll be remapping normal memory.
509          */
510         for (page = (unsigned long)fbdev->fb_mem;
511              page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
512              page += PAGE_SIZE) {
513 #if CONFIG_DMA_NONCOHERENT
514                 SetPageReserved(virt_to_page(CAC_ADDR(page)));
515 #else
516                 SetPageReserved(virt_to_page(page));
517 #endif
518         }
519
520         print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
521         print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
522
523         /* Setup LCD clock to AUX (48 MHz) */
524         sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
525         au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
526
527         /* load the panel info into the var struct */
528         au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
529         au1100fb_var.xres = fbdev->panel->xres;
530         au1100fb_var.xres_virtual = au1100fb_var.xres;
531         au1100fb_var.yres = fbdev->panel->yres;
532         au1100fb_var.yres_virtual = au1100fb_var.yres;
533
534         fbdev->info.screen_base = fbdev->fb_mem;
535         fbdev->info.fbops = &au1100fb_ops;
536         fbdev->info.fix = au1100fb_fix;
537
538         if (!(fbdev->info.pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL))) {
539                 return -ENOMEM;
540         }
541         memset(fbdev->info.pseudo_palette, 0, sizeof(u32) * 16);
542
543         if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
544                 print_err("Fail to allocate colormap (%d entries)",
545                            AU1100_LCD_NBR_PALETTE_ENTRIES);
546                 kfree(fbdev->info.pseudo_palette);
547                 return -EFAULT;
548         }
549
550         fbdev->info.var = au1100fb_var;
551
552         /* Set h/w registers */
553         au1100fb_setmode(fbdev);
554
555         /* Register new framebuffer */
556         if (register_framebuffer(&fbdev->info) < 0) {
557                 print_err("cannot register new framebuffer");
558                 goto failed;
559         }
560
561         return 0;
562
563 failed:
564         if (fbdev->regs) {
565                 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
566         }
567         if (fbdev->fb_mem) {
568                 dma_free_noncoherent(dev, fbdev->fb_len, fbdev->fb_mem, fbdev->fb_phys);
569         }
570         if (fbdev->info.cmap.len != 0) {
571                 fb_dealloc_cmap(&fbdev->info.cmap);
572         }
573         kfree(fbdev);
574         dev_set_drvdata(dev, NULL);
575
576         return 0;
577 }
578
579 int au1100fb_drv_remove(struct device *dev)
580 {
581         struct au1100fb_device *fbdev = NULL;
582
583         if (!dev)
584                 return -ENODEV;
585
586         fbdev = (struct au1100fb_device*) dev_get_drvdata(dev);
587
588 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
589         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
590 #endif
591         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
592
593         /* Clean up all probe data */
594         unregister_framebuffer(&fbdev->info);
595
596         release_mem_region(fbdev->regs_phys, fbdev->regs_len);
597
598         dma_free_coherent(dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem, fbdev->fb_phys);
599
600         fb_dealloc_cmap(&fbdev->info.cmap);
601         kfree(fbdev->info.pseudo_palette);
602         kfree((void*)fbdev);
603
604         return 0;
605 }
606
607 #ifdef CONFIG_PM
608 static u32 sys_clksrc;
609 static struct au1100fb_regs fbregs;
610
611 int au1100fb_drv_suspend(struct device *dev, pm_message_t state)
612 {
613         struct au1100fb_device *fbdev = dev_get_drvdata(dev);
614
615         if (!fbdev)
616                 return 0;
617
618         /* Save the clock source state */
619         sys_clksrc = au_readl(SYS_CLKSRC);
620
621         /* Blank the LCD */
622         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
623
624         /* Stop LCD clocking */
625         au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
626
627         memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
628
629         return 0;
630 }
631
632 int au1100fb_drv_resume(struct device *dev)
633 {
634         struct au1100fb_device *fbdev = dev_get_drvdata(dev);
635
636         if (!fbdev)
637                 return 0;
638
639         memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
640
641         /* Restart LCD clocking */
642         au_writel(sys_clksrc, SYS_CLKSRC);
643
644         /* Unblank the LCD */
645         au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
646
647         return 0;
648 }
649 #else
650 #define au1100fb_drv_suspend NULL
651 #define au1100fb_drv_resume NULL
652 #endif
653
654 static struct device_driver au1100fb_driver = {
655         .name           = "au1100-lcd",
656         .bus            = &platform_bus_type,
657
658         .probe          = au1100fb_drv_probe,
659         .remove         = au1100fb_drv_remove,
660         .suspend        = au1100fb_drv_suspend,
661         .resume         = au1100fb_drv_resume,
662 };
663
664 /*-------------------------------------------------------------------------*/
665
666 /* Kernel driver */
667
668 int au1100fb_setup(char *options)
669 {
670         char* this_opt;
671         int num_panels = ARRAY_SIZE(known_lcd_panels);
672         char* mode = NULL;
673         int panel_idx = 0;
674
675         if (num_panels <= 0) {
676                 print_err("No LCD panels supported by driver!");
677                 return -EFAULT;
678                         }
679
680         if (options) {
681                 while ((this_opt = strsep(&options,",")) != NULL) {
682                         /* Panel option */
683                 if (!strncmp(this_opt, "panel:", 6)) {
684                                 int i;
685                                 this_opt += 6;
686                                 for (i = 0; i < num_panels; i++) {
687                                         if (!strncmp(this_opt,
688                                                      known_lcd_panels[i].name,
689                                                         strlen(this_opt))) {
690                                                 panel_idx = i;
691                                         break;
692                                 }
693                         }
694                                 if (i >= num_panels) {
695                                         print_warn("Panel %s not supported!", this_opt);
696                                 }
697                         }
698                         /* Mode option (only option that start with digit) */
699                         else if (isdigit(this_opt[0])) {
700                                 mode = kmalloc(strlen(this_opt) + 1, GFP_KERNEL);
701                                 strncpy(mode, this_opt, strlen(this_opt) + 1);
702                         }
703                         /* Unsupported option */
704                         else {
705                                 print_warn("Unsupported option \"%s\"", this_opt);
706                 }
707                 }
708         }
709
710         drv_info.panel_idx = panel_idx;
711         drv_info.opt_mode = mode;
712
713         print_info("Panel=%s Mode=%s",
714                         known_lcd_panels[drv_info.panel_idx].name,
715                         drv_info.opt_mode ? drv_info.opt_mode : "default");
716
717         return 0;
718 }
719
720 int __init au1100fb_init(void)
721 {
722         char* options;
723         int ret;
724
725         print_info("" DRIVER_DESC "");
726
727         memset(&drv_info, 0, sizeof(drv_info));
728
729         if (fb_get_options(DRIVER_NAME, &options))
730                 return -ENODEV;
731
732         /* Setup driver with options */
733         ret = au1100fb_setup(options);
734         if (ret < 0) {
735                 print_err("Fail to setup driver");
736                 return ret;
737         }
738
739         return driver_register(&au1100fb_driver);
740 }
741
742 void __exit au1100fb_cleanup(void)
743 {
744         driver_unregister(&au1100fb_driver);
745
746         kfree(drv_info.opt_mode);
747 }
748
749 module_init(au1100fb_init);
750 module_exit(au1100fb_cleanup);
751
752 MODULE_DESCRIPTION(DRIVER_DESC);
753 MODULE_LICENSE("GPL");