[PATCH] Video: fb, kzalloc changes
[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
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 static int nocursor = 0;
115 module_param(nocursor, int, 0644);
116 MODULE_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          */
122 int 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  */
219 int 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  */
279 int 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  */
324 int 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  */
371 void 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  */
392 int 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  */
433 int 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
441 static 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
460 int 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
575 failed:
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
591 int 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
620 static u32 sys_clksrc;
621 static struct au1100fb_regs fbregs;
622
623 int 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
644 int 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
666 static 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
680 int 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
737 int __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
759 void __exit au1100fb_cleanup(void)
760 {
761         driver_unregister(&au1100fb_driver);
762
763         kfree(drv_info.opt_mode);
764 }
765
766 module_init(au1100fb_init);
767 module_exit(au1100fb_cleanup);
768
769 MODULE_DESCRIPTION(DRIVER_DESC);
770 MODULE_LICENSE("GPL");