drivers/video/backlight/adp8860_bl.c: remove a redundant assignment for max_brightness
[linux-2.6.git] / 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  * 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 #include <linux/slab.h>
56
57 #include <asm/mach-au1x00/au1000.h>
58
59 #define DEBUG 0
60
61 #include "au1100fb.h"
62
63 /*
64  * Sanity check. If this is a new Au1100 based board, search for
65  * the PB1100 ifdefs to make sure you modify the code accordingly.
66  */
67 #if defined(CONFIG_MIPS_PB1100)
68   #include <asm/mach-pb1x00/pb1100.h>
69 #elif defined(CONFIG_MIPS_DB1100)
70   #include <asm/mach-db1x00/db1x00.h>
71 #else
72   #error "Unknown Au1100 board, Au1100 FB driver not supported"
73 #endif
74
75 #define DRIVER_NAME "au1100fb"
76 #define DRIVER_DESC "LCD controller driver for AU1100 processors"
77
78 #define to_au1100fb_device(_info) \
79           (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
80
81 /* Bitfields format supported by the controller. Note that the order of formats
82  * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
83  * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
84  */
85 struct fb_bitfield rgb_bitfields[][4] =
86 {
87         /*     Red,        Green,        Blue,       Transp   */
88         { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
89         { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
90         { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
91         { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
92         { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
93
94         /* The last is used to describe 12bpp format */
95         { { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
96 };
97
98 static struct fb_fix_screeninfo au1100fb_fix __devinitdata = {
99         .id             = "AU1100 FB",
100         .xpanstep       = 1,
101         .ypanstep       = 1,
102         .type           = FB_TYPE_PACKED_PIXELS,
103         .accel          = FB_ACCEL_NONE,
104 };
105
106 static struct fb_var_screeninfo au1100fb_var __devinitdata = {
107         .activate       = FB_ACTIVATE_NOW,
108         .height         = -1,
109         .width          = -1,
110         .vmode          = FB_VMODE_NONINTERLACED,
111 };
112
113 static struct au1100fb_drv_info drv_info;
114
115 static int nocursor = 0;
116 module_param(nocursor, int, 0644);
117 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
118
119 /* fb_blank
120  * Blank the screen. Depending on the mode, the screen will be
121  * activated with the backlight color, or desactivated
122  */
123 static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
124 {
125         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
126
127         print_dbg("fb_blank %d %p", blank_mode, fbi);
128
129         switch (blank_mode) {
130
131         case VESA_NO_BLANKING:
132                         /* Turn on panel */
133                         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
134 #ifdef CONFIG_MIPS_PB1100
135                         if (drv_info.panel_idx == 1) {
136                                 au_writew(au_readw(PB1100_G_CONTROL)
137                                           | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
138                         PB1100_G_CONTROL);
139                         }
140 #endif
141                 au_sync();
142                 break;
143
144         case VESA_VSYNC_SUSPEND:
145         case VESA_HSYNC_SUSPEND:
146         case VESA_POWERDOWN:
147                         /* Turn off panel */
148                         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
149 #ifdef CONFIG_MIPS_PB1100
150                         if (drv_info.panel_idx == 1) {
151                                 au_writew(au_readw(PB1100_G_CONTROL)
152                                           & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
153                         PB1100_G_CONTROL);
154                         }
155 #endif
156                 au_sync();
157                 break;
158         default:
159                 break;
160
161         }
162         return 0;
163 }
164
165 /*
166  * Set hardware with var settings. This will enable the controller with a specific
167  * mode, normally validated with the fb_check_var method
168          */
169 int au1100fb_setmode(struct au1100fb_device *fbdev)
170 {
171         struct fb_info *info = &fbdev->info;
172         u32 words;
173         int index;
174
175         if (!fbdev)
176                 return -EINVAL;
177
178         /* Update var-dependent FB info */
179         if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
180                 if (info->var.bits_per_pixel <= 8) {
181                         /* palettized */
182                         info->var.red.offset    = 0;
183                         info->var.red.length    = info->var.bits_per_pixel;
184                         info->var.red.msb_right = 0;
185
186                         info->var.green.offset  = 0;
187                         info->var.green.length  = info->var.bits_per_pixel;
188                         info->var.green.msb_right = 0;
189
190                         info->var.blue.offset   = 0;
191                         info->var.blue.length   = info->var.bits_per_pixel;
192                         info->var.blue.msb_right = 0;
193
194                         info->var.transp.offset = 0;
195                         info->var.transp.length = 0;
196                         info->var.transp.msb_right = 0;
197
198                         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
199                         info->fix.line_length = info->var.xres_virtual /
200                                                         (8/info->var.bits_per_pixel);
201                 } else {
202                         /* non-palettized */
203                         index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
204                         info->var.red = rgb_bitfields[index][0];
205                         info->var.green = rgb_bitfields[index][1];
206                         info->var.blue = rgb_bitfields[index][2];
207                         info->var.transp = rgb_bitfields[index][3];
208
209                         info->fix.visual = FB_VISUAL_TRUECOLOR;
210                         info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
211                 }
212         } else {
213                 /* mono */
214                 info->fix.visual = FB_VISUAL_MONO10;
215                 info->fix.line_length = info->var.xres_virtual / 8;
216         }
217
218         info->screen_size = info->fix.line_length * info->var.yres_virtual;
219         info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
220                                 >> LCD_CONTROL_SM_BIT) * 90;
221
222         /* Determine BPP mode and format */
223         fbdev->regs->lcd_control = fbdev->panel->control_base;
224         fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
225         fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
226         fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
227         fbdev->regs->lcd_intenable = 0;
228         fbdev->regs->lcd_intstatus = 0;
229         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
230
231         if (panel_is_dual(fbdev->panel)) {
232                 /* Second panel display seconf half of screen if possible,
233                  * otherwise display the same as the first panel */
234                 if (info->var.yres_virtual >= (info->var.yres << 1)) {
235                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
236                                                           (info->fix.line_length *
237                                                           (info->var.yres_virtual >> 1)));
238                 } else {
239                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
240                 }
241         }
242
243         words = info->fix.line_length / sizeof(u32);
244         if (!info->var.rotate || (info->var.rotate == 180)) {
245                 words *= info->var.yres_virtual;
246                 if (info->var.rotate /* 180 */) {
247                         words -= (words % 8); /* should be divisable by 8 */
248                 }
249         }
250         fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
251
252         fbdev->regs->lcd_pwmdiv = 0;
253         fbdev->regs->lcd_pwmhi = 0;
254
255         /* Resume controller */
256         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
257         mdelay(10);
258         au1100fb_fb_blank(VESA_NO_BLANKING, info);
259
260         return 0;
261 }
262
263 /* fb_setcolreg
264  * Set color in LCD palette.
265  */
266 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
267 {
268         struct au1100fb_device *fbdev;
269         u32 *palette;
270         u32 value;
271
272         fbdev = to_au1100fb_device(fbi);
273         palette = fbdev->regs->lcd_pallettebase;
274
275         if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
276                 return -EINVAL;
277
278         if (fbi->var.grayscale) {
279                 /* Convert color to grayscale */
280                 red = green = blue =
281                         (19595 * red + 38470 * green + 7471 * blue) >> 16;
282         }
283
284         if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
285                 /* Place color in the pseudopalette */
286                 if (regno > 16)
287                         return -EINVAL;
288
289                 palette = (u32*)fbi->pseudo_palette;
290
291                 red   >>= (16 - fbi->var.red.length);
292                 green >>= (16 - fbi->var.green.length);
293                 blue  >>= (16 - fbi->var.blue.length);
294
295                 value = (red   << fbi->var.red.offset)  |
296                         (green << fbi->var.green.offset)|
297                         (blue  << fbi->var.blue.offset);
298                 value &= 0xFFFF;
299
300         } else if (panel_is_active(fbdev->panel)) {
301                 /* COLOR TFT PALLETTIZED (use RGB 565) */
302                 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
303                 value &= 0xFFFF;
304
305         } else if (panel_is_color(fbdev->panel)) {
306                 /* COLOR STN MODE */
307                 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
308                         ((green >> 8) & 0x00F0) |
309                         (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
310                 value &= 0xFFF;
311         } else {
312                 /* MONOCHROME MODE */
313                 value = (green >> 12) & 0x000F;
314                 value &= 0xF;
315         }
316
317         palette[regno] = value;
318
319         return 0;
320 }
321
322 /* fb_pan_display
323  * Pan display in x and/or y as specified
324  */
325 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
326 {
327         struct au1100fb_device *fbdev;
328         int dy;
329
330         fbdev = to_au1100fb_device(fbi);
331
332         print_dbg("fb_pan_display %p %p", var, fbi);
333
334         if (!var || !fbdev) {
335                 return -EINVAL;
336         }
337
338         if (var->xoffset - fbi->var.xoffset) {
339                 /* No support for X panning for now! */
340                 return -EINVAL;
341         }
342
343         print_dbg("fb_pan_display 2 %p %p", var, fbi);
344         dy = var->yoffset - fbi->var.yoffset;
345         if (dy) {
346
347                 u32 dmaaddr;
348
349                 print_dbg("Panning screen of %d lines", dy);
350
351                 dmaaddr = fbdev->regs->lcd_dmaaddr0;
352                 dmaaddr += (fbi->fix.line_length * dy);
353
354                 /* TODO: Wait for current frame to finished */
355                 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
356
357                 if (panel_is_dual(fbdev->panel)) {
358                         dmaaddr = fbdev->regs->lcd_dmaaddr1;
359                         dmaaddr += (fbi->fix.line_length * dy);
360                         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
361         }
362         }
363         print_dbg("fb_pan_display 3 %p %p", var, fbi);
364
365         return 0;
366 }
367
368 /* fb_rotate
369  * Rotate the display of this angle. This doesn't seems to be used by the core,
370  * but as our hardware supports it, so why not implementing it...
371  */
372 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
373 {
374         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
375
376         print_dbg("fb_rotate %p %d", fbi, angle);
377
378         if (fbdev && (angle > 0) && !(angle % 90)) {
379
380                 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
381
382                 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
383                 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
384
385                 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
386         }
387 }
388
389 /* fb_mmap
390  * Map video memory in user space. We don't use the generic fb_mmap method mainly
391  * to allow the use of the TLB streaming flag (CCA=6)
392  */
393 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
394 {
395         struct au1100fb_device *fbdev;
396         unsigned int len;
397         unsigned long start=0, off;
398
399         fbdev = to_au1100fb_device(fbi);
400
401         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
402                 return -EINVAL;
403         }
404
405         start = fbdev->fb_phys & PAGE_MASK;
406         len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
407
408         off = vma->vm_pgoff << PAGE_SHIFT;
409
410         if ((vma->vm_end - vma->vm_start + off) > len) {
411                 return -EINVAL;
412         }
413
414         off += start;
415         vma->vm_pgoff = off >> PAGE_SHIFT;
416
417         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
418         pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
419
420         vma->vm_flags |= VM_IO;
421
422         if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
423                                 vma->vm_end - vma->vm_start,
424                                 vma->vm_page_prot)) {
425                 return -EAGAIN;
426         }
427
428         return 0;
429 }
430
431 /* fb_cursor
432  * Used to disable cursor drawing...
433  */
434 int au1100fb_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
435 {
436         if (nocursor)
437                 return 0;
438         else
439                 return -EINVAL; /* just to force soft_cursor() call */
440 }
441
442 static struct fb_ops au1100fb_ops =
443 {
444         .owner                  = THIS_MODULE,
445         .fb_setcolreg           = au1100fb_fb_setcolreg,
446         .fb_blank               = au1100fb_fb_blank,
447         .fb_pan_display         = au1100fb_fb_pan_display,
448         .fb_fillrect            = cfb_fillrect,
449         .fb_copyarea            = cfb_copyarea,
450         .fb_imageblit           = cfb_imageblit,
451         .fb_rotate              = au1100fb_fb_rotate,
452         .fb_mmap                = au1100fb_fb_mmap,
453         .fb_cursor              = au1100fb_fb_cursor,
454 };
455
456
457 /*-------------------------------------------------------------------------*/
458
459 /* AU1100 LCD controller device driver */
460
461 static int __devinit au1100fb_drv_probe(struct platform_device *dev)
462 {
463         struct au1100fb_device *fbdev = NULL;
464         struct resource *regs_res;
465         unsigned long page;
466         u32 sys_clksrc;
467
468         if (!dev)
469                         return -EINVAL;
470
471         /* Allocate new device private */
472         if (!(fbdev = kzalloc(sizeof(struct au1100fb_device), GFP_KERNEL))) {
473                 print_err("fail to allocate device private record");
474                 return -ENOMEM;
475         }
476
477         fbdev->panel = &known_lcd_panels[drv_info.panel_idx];
478
479         platform_set_drvdata(dev, (void *)fbdev);
480
481         /* Allocate region for our registers and map them */
482         if (!(regs_res = platform_get_resource(to_platform_device(dev),
483                                         IORESOURCE_MEM, 0))) {
484                 print_err("fail to retrieve registers resource");
485                 return -EFAULT;
486         }
487
488         au1100fb_fix.mmio_start = regs_res->start;
489         au1100fb_fix.mmio_len = regs_res->end - regs_res->start + 1;
490
491         if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
492                                 DRIVER_NAME)) {
493                 print_err("fail to lock memory region at 0x%08lx",
494                                 au1100fb_fix.mmio_start);
495                 return -EBUSY;
496         }
497
498         fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
499
500         print_dbg("Register memory map at %p", fbdev->regs);
501         print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
502
503
504
505         /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
506         fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
507                         (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
508
509         fbdev->fb_mem = dma_alloc_coherent(dev, PAGE_ALIGN(fbdev->fb_len),
510                                         &fbdev->fb_phys, GFP_KERNEL);
511         if (!fbdev->fb_mem) {
512                 print_err("fail to allocate frambuffer (size: %dK))",
513                           fbdev->fb_len / 1024);
514                 return -ENOMEM;
515         }
516
517         au1100fb_fix.smem_start = fbdev->fb_phys;
518         au1100fb_fix.smem_len = fbdev->fb_len;
519
520         /*
521          * Set page reserved so that mmap will work. This is necessary
522          * since we'll be remapping normal memory.
523          */
524         for (page = (unsigned long)fbdev->fb_mem;
525              page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
526              page += PAGE_SIZE) {
527 #if CONFIG_DMA_NONCOHERENT
528                 SetPageReserved(virt_to_page(CAC_ADDR(page)));
529 #else
530                 SetPageReserved(virt_to_page(page));
531 #endif
532         }
533
534         print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
535         print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
536
537         /* Setup LCD clock to AUX (48 MHz) */
538         sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
539         au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
540
541         /* load the panel info into the var struct */
542         au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
543         au1100fb_var.xres = fbdev->panel->xres;
544         au1100fb_var.xres_virtual = au1100fb_var.xres;
545         au1100fb_var.yres = fbdev->panel->yres;
546         au1100fb_var.yres_virtual = au1100fb_var.yres;
547
548         fbdev->info.screen_base = fbdev->fb_mem;
549         fbdev->info.fbops = &au1100fb_ops;
550         fbdev->info.fix = au1100fb_fix;
551
552         if (!(fbdev->info.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL))) {
553                 return -ENOMEM;
554         }
555
556         if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
557                 print_err("Fail to allocate colormap (%d entries)",
558                            AU1100_LCD_NBR_PALETTE_ENTRIES);
559                 kfree(fbdev->info.pseudo_palette);
560                 return -EFAULT;
561         }
562
563         fbdev->info.var = au1100fb_var;
564
565         /* Set h/w registers */
566         au1100fb_setmode(fbdev);
567
568         /* Register new framebuffer */
569         if (register_framebuffer(&fbdev->info) < 0) {
570                 print_err("cannot register new framebuffer");
571                 goto failed;
572         }
573
574         return 0;
575
576 failed:
577         if (fbdev->regs) {
578                 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
579         }
580         if (fbdev->fb_mem) {
581                 dma_free_noncoherent(dev, fbdev->fb_len, fbdev->fb_mem, fbdev->fb_phys);
582         }
583         if (fbdev->info.cmap.len != 0) {
584                 fb_dealloc_cmap(&fbdev->info.cmap);
585         }
586         kfree(fbdev);
587         platform_set_drvdata(dev, NULL);
588
589         return 0;
590 }
591
592 int au1100fb_drv_remove(struct platform_device *dev)
593 {
594         struct au1100fb_device *fbdev = NULL;
595
596         if (!dev)
597                 return -ENODEV;
598
599         fbdev = (struct au1100fb_device *) platform_get_drvdata(dev);
600
601 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
602         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
603 #endif
604         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
605
606         /* Clean up all probe data */
607         unregister_framebuffer(&fbdev->info);
608
609         release_mem_region(fbdev->regs_phys, fbdev->regs_len);
610
611         dma_free_coherent(dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem, fbdev->fb_phys);
612
613         fb_dealloc_cmap(&fbdev->info.cmap);
614         kfree(fbdev->info.pseudo_palette);
615         kfree((void*)fbdev);
616
617         return 0;
618 }
619
620 #ifdef CONFIG_PM
621 static u32 sys_clksrc;
622 static struct au1100fb_regs fbregs;
623
624 int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
625 {
626         struct au1100fb_device *fbdev = platform_get_drvdata(dev);
627
628         if (!fbdev)
629                 return 0;
630
631         /* Save the clock source state */
632         sys_clksrc = au_readl(SYS_CLKSRC);
633
634         /* Blank the LCD */
635         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
636
637         /* Stop LCD clocking */
638         au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
639
640         memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
641
642         return 0;
643 }
644
645 int au1100fb_drv_resume(struct platform_device *dev)
646 {
647         struct au1100fb_device *fbdev = platform_get_drvdata(dev);
648
649         if (!fbdev)
650                 return 0;
651
652         memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
653
654         /* Restart LCD clocking */
655         au_writel(sys_clksrc, SYS_CLKSRC);
656
657         /* Unblank the LCD */
658         au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
659
660         return 0;
661 }
662 #else
663 #define au1100fb_drv_suspend NULL
664 #define au1100fb_drv_resume NULL
665 #endif
666
667 static struct platform_driver au1100fb_driver = {
668         .driver = {
669                 .name           = "au1100-lcd",
670                 .owner          = THIS_MODULE,
671         },
672         .probe          = au1100fb_drv_probe,
673         .remove         = au1100fb_drv_remove,
674         .suspend        = au1100fb_drv_suspend,
675         .resume         = au1100fb_drv_resume,
676 };
677
678 /*-------------------------------------------------------------------------*/
679
680 /* Kernel driver */
681
682 int au1100fb_setup(char *options)
683 {
684         char* this_opt;
685         int num_panels = ARRAY_SIZE(known_lcd_panels);
686         char* mode = NULL;
687         int panel_idx = 0;
688
689         if (num_panels <= 0) {
690                 print_err("No LCD panels supported by driver!");
691                 return -EFAULT;
692                         }
693
694         if (options) {
695                 while ((this_opt = strsep(&options,",")) != NULL) {
696                         /* Panel option */
697                         if (!strncmp(this_opt, "panel:", 6)) {
698                                 int i;
699                                 this_opt += 6;
700                                 for (i = 0; i < num_panels; i++) {
701                                         if (!strncmp(this_opt,
702                                                      known_lcd_panels[i].name,
703                                                         strlen(this_opt))) {
704                                                 panel_idx = i;
705                                                 break;
706                                         }
707                                 }
708                                 if (i >= num_panels) {
709                                         print_warn("Panel %s not supported!", this_opt);
710                                 }
711                         }
712                         if (!strncmp(this_opt, "nocursor", 8)) {
713                                 this_opt += 8;
714                                 nocursor = 1;
715                                 print_info("Cursor disabled");
716                         }
717                         /* Mode option (only option that start with digit) */
718                         else if (isdigit(this_opt[0])) {
719                                 mode = kstrdup(this_opt, GFP_KERNEL);
720                                 if (!mode) {
721                                         print_err("memory allocation failed");
722                                         return -ENOMEM;
723                                 }
724                         }
725                         /* Unsupported option */
726                         else {
727                                 print_warn("Unsupported option \"%s\"", this_opt);
728                         }
729                 }
730         }
731
732         drv_info.panel_idx = panel_idx;
733         drv_info.opt_mode = mode;
734
735         print_info("Panel=%s Mode=%s",
736                         known_lcd_panels[drv_info.panel_idx].name,
737                         drv_info.opt_mode ? drv_info.opt_mode : "default");
738
739         return 0;
740 }
741
742 int __init au1100fb_init(void)
743 {
744         char* options;
745         int ret;
746
747         print_info("" DRIVER_DESC "");
748
749         memset(&drv_info, 0, sizeof(drv_info));
750
751         if (fb_get_options(DRIVER_NAME, &options))
752                 return -ENODEV;
753
754         /* Setup driver with options */
755         ret = au1100fb_setup(options);
756         if (ret < 0) {
757                 print_err("Fail to setup driver");
758                 return ret;
759         }
760
761         return platform_driver_register(&au1100fb_driver);
762 }
763
764 void __exit au1100fb_cleanup(void)
765 {
766         platform_driver_unregister(&au1100fb_driver);
767
768         kfree(drv_info.opt_mode);
769 }
770
771 module_init(au1100fb_init);
772 module_exit(au1100fb_cleanup);
773
774 MODULE_DESCRIPTION(DRIVER_DESC);
775 MODULE_LICENSE("GPL");