Merge master.kernel.org:/home/rmk/linux-2.6-arm
[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/module.h>
44 #include <linux/kernel.h>
45 #include <linux/errno.h>
46 #include <linux/string.h>
47 #include <linux/mm.h>
48 #include <linux/fb.h>
49 #include <linux/init.h>
50 #include <linux/interrupt.h>
51 #include <linux/ctype.h>
52 #include <linux/dma-mapping.h>
53 #include <linux/platform_device.h>
54
55 #include <asm/mach-au1x00/au1000.h>
56
57 #define DEBUG 0
58
59 #include "au1100fb.h"
60
61 /*
62  * Sanity check. If this is a new Au1100 based board, search for
63  * the PB1100 ifdefs to make sure you modify the code accordingly.
64  */
65 #if defined(CONFIG_MIPS_PB1100)
66   #include <asm/mach-pb1x00/pb1100.h>
67 #elif defined(CONFIG_MIPS_DB1100)
68   #include <asm/mach-db1x00/db1x00.h>
69 #else
70   #error "Unknown Au1100 board, Au1100 FB driver not supported"
71 #endif
72
73 #define DRIVER_NAME "au1100fb"
74 #define DRIVER_DESC "LCD controller driver for AU1100 processors"
75
76 #define to_au1100fb_device(_info) \
77           (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
78
79 /* Bitfields format supported by the controller. Note that the order of formats
80  * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
81  * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
82  */
83 struct fb_bitfield rgb_bitfields[][4] =
84 {
85         /*     Red,        Green,        Blue,       Transp   */
86         { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
87         { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
88         { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
89         { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
90         { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
91
92         /* The last is used to describe 12bpp format */
93         { { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
94 };
95
96 static struct fb_fix_screeninfo au1100fb_fix __initdata = {
97         .id             = "AU1100 FB",
98         .xpanstep       = 1,
99         .ypanstep       = 1,
100         .type           = FB_TYPE_PACKED_PIXELS,
101         .accel          = FB_ACCEL_NONE,
102 };
103
104 static struct fb_var_screeninfo au1100fb_var __initdata = {
105         .activate       = FB_ACTIVATE_NOW,
106         .height         = -1,
107         .width          = -1,
108         .vmode          = FB_VMODE_NONINTERLACED,
109 };
110
111 static struct au1100fb_drv_info drv_info;
112
113 /*
114  * Set hardware with var settings. This will enable the controller with a specific
115  * mode, normally validated with the fb_check_var method
116          */
117 int au1100fb_setmode(struct au1100fb_device *fbdev)
118 {
119         struct fb_info *info = &fbdev->info;
120         u32 words;
121         int index;
122
123         if (!fbdev)
124                 return -EINVAL;
125
126         /* Update var-dependent FB info */
127         if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
128                 if (info->var.bits_per_pixel <= 8) {
129                         /* palettized */
130                         info->var.red.offset    = 0;
131                         info->var.red.length    = info->var.bits_per_pixel;
132                         info->var.red.msb_right = 0;
133
134                         info->var.green.offset  = 0;
135                         info->var.green.length  = info->var.bits_per_pixel;
136                         info->var.green.msb_right = 0;
137
138                         info->var.blue.offset   = 0;
139                         info->var.blue.length   = info->var.bits_per_pixel;
140                         info->var.blue.msb_right = 0;
141
142                         info->var.transp.offset = 0;
143                         info->var.transp.length = 0;
144                         info->var.transp.msb_right = 0;
145
146                         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
147                         info->fix.line_length = info->var.xres_virtual /
148                                                         (8/info->var.bits_per_pixel);
149                 } else {
150                         /* non-palettized */
151                         index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
152                         info->var.red = rgb_bitfields[index][0];
153                         info->var.green = rgb_bitfields[index][1];
154                         info->var.blue = rgb_bitfields[index][2];
155                         info->var.transp = rgb_bitfields[index][3];
156
157                         info->fix.visual = FB_VISUAL_TRUECOLOR;
158                         info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
159                 }
160         } else {
161                 /* mono */
162                 info->fix.visual = FB_VISUAL_MONO10;
163                 info->fix.line_length = info->var.xres_virtual / 8;
164         }
165
166         info->screen_size = info->fix.line_length * info->var.yres_virtual;
167         info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
168                                 >> LCD_CONTROL_SM_BIT) * 90;
169
170         /* Determine BPP mode and format */
171         fbdev->regs->lcd_control = fbdev->panel->control_base;
172         fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
173         fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
174         fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
175         fbdev->regs->lcd_intenable = 0;
176         fbdev->regs->lcd_intstatus = 0;
177         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
178
179         if (panel_is_dual(fbdev->panel)) {
180                 /* Second panel display seconf half of screen if possible,
181                  * otherwise display the same as the first panel */
182                 if (info->var.yres_virtual >= (info->var.yres << 1)) {
183                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
184                                                           (info->fix.line_length *
185                                                           (info->var.yres_virtual >> 1)));
186                 } else {
187                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
188                 }
189         }
190
191         words = info->fix.line_length / sizeof(u32);
192         if (!info->var.rotate || (info->var.rotate == 180)) {
193                 words *= info->var.yres_virtual;
194                 if (info->var.rotate /* 180 */) {
195                         words -= (words % 8); /* should be divisable by 8 */
196                 }
197         }
198         fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
199
200         fbdev->regs->lcd_pwmdiv = 0;
201         fbdev->regs->lcd_pwmhi = 0;
202
203         /* Resume controller */
204         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
205         mdelay(10);
206         au1100fb_fb_blank(VESA_NO_BLANKING, info);
207
208         return 0;
209 }
210
211 /* fb_setcolreg
212  * Set color in LCD palette.
213  */
214 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
215 {
216         struct au1100fb_device *fbdev;
217         u32 *palette;
218         u32 value;
219
220         fbdev = to_au1100fb_device(fbi);
221         palette = fbdev->regs->lcd_pallettebase;
222
223         if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
224                 return -EINVAL;
225
226         if (fbi->var.grayscale) {
227                 /* Convert color to grayscale */
228                 red = green = blue =
229                         (19595 * red + 38470 * green + 7471 * blue) >> 16;
230         }
231
232         if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
233                 /* Place color in the pseudopalette */
234                 if (regno > 16)
235                         return -EINVAL;
236
237                 palette = (u32*)fbi->pseudo_palette;
238
239                 red   >>= (16 - fbi->var.red.length);
240                 green >>= (16 - fbi->var.green.length);
241                 blue  >>= (16 - fbi->var.blue.length);
242
243                 value = (red   << fbi->var.red.offset)  |
244                         (green << fbi->var.green.offset)|
245                         (blue  << fbi->var.blue.offset);
246                 value &= 0xFFFF;
247
248         } else if (panel_is_active(fbdev->panel)) {
249                 /* COLOR TFT PALLETTIZED (use RGB 565) */
250                 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
251                 value &= 0xFFFF;
252
253         } else if (panel_is_color(fbdev->panel)) {
254                 /* COLOR STN MODE */
255                 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
256                         ((green >> 8) & 0x00F0) |
257                         (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
258                 value &= 0xFFF;
259         } else {
260                 /* MONOCHROME MODE */
261                 value = (green >> 12) & 0x000F;
262                 value &= 0xF;
263         }
264
265         palette[regno] = value;
266
267         return 0;
268 }
269
270 /* fb_blank
271  * Blank the screen. Depending on the mode, the screen will be
272  * activated with the backlight color, or desactivated
273  */
274 int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
275 {
276         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
277
278         print_dbg("fb_blank %d %p", blank_mode, fbi);
279
280         switch (blank_mode) {
281
282         case VESA_NO_BLANKING:
283                         /* Turn on panel */
284                         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
285 #ifdef CONFIG_MIPS_PB1100
286                         if (drv_info.panel_idx == 1) {
287                                 au_writew(au_readw(PB1100_G_CONTROL)
288                                           | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
289                         PB1100_G_CONTROL);
290                         }
291 #endif
292                 au_sync();
293                 break;
294
295         case VESA_VSYNC_SUSPEND:
296         case VESA_HSYNC_SUSPEND:
297         case VESA_POWERDOWN:
298                         /* Turn off panel */
299                         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
300 #ifdef CONFIG_MIPS_PB1100
301                         if (drv_info.panel_idx == 1) {
302                                 au_writew(au_readw(PB1100_G_CONTROL)
303                                           & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
304                         PB1100_G_CONTROL);
305                         }
306 #endif
307                 au_sync();
308                 break;
309         default:
310                 break;
311
312         }
313         return 0;
314 }
315
316 /* fb_pan_display
317  * Pan display in x and/or y as specified
318  */
319 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
320 {
321         struct au1100fb_device *fbdev;
322         int dy;
323
324         fbdev = to_au1100fb_device(fbi);
325
326         print_dbg("fb_pan_display %p %p", var, fbi);
327
328         if (!var || !fbdev) {
329                 return -EINVAL;
330         }
331
332         if (var->xoffset - fbi->var.xoffset) {
333                 /* No support for X panning for now! */
334                 return -EINVAL;
335         }
336
337         print_dbg("fb_pan_display 2 %p %p", var, fbi);
338         dy = var->yoffset - fbi->var.yoffset;
339         if (dy) {
340
341                 u32 dmaaddr;
342
343                 print_dbg("Panning screen of %d lines", dy);
344
345                 dmaaddr = fbdev->regs->lcd_dmaaddr0;
346                 dmaaddr += (fbi->fix.line_length * dy);
347
348                 /* TODO: Wait for current frame to finished */
349                 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
350
351                 if (panel_is_dual(fbdev->panel)) {
352                         dmaaddr = fbdev->regs->lcd_dmaaddr1;
353                         dmaaddr += (fbi->fix.line_length * dy);
354                         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
355         }
356         }
357         print_dbg("fb_pan_display 3 %p %p", var, fbi);
358
359         return 0;
360 }
361
362 /* fb_rotate
363  * Rotate the display of this angle. This doesn't seems to be used by the core,
364  * but as our hardware supports it, so why not implementing it...
365  */
366 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
367 {
368         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
369
370         print_dbg("fb_rotate %p %d", fbi, angle);
371
372         if (fbdev && (angle > 0) && !(angle % 90)) {
373
374                 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
375
376                 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
377                 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
378
379                 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
380         }
381 }
382
383 /* fb_mmap
384  * Map video memory in user space. We don't use the generic fb_mmap method mainly
385  * to allow the use of the TLB streaming flag (CCA=6)
386  */
387 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
388 {
389         struct au1100fb_device *fbdev;
390         unsigned int len;
391         unsigned long start=0, off;
392
393         fbdev = to_au1100fb_device(fbi);
394
395         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
396                 return -EINVAL;
397         }
398
399         start = fbdev->fb_phys & PAGE_MASK;
400         len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
401
402         off = vma->vm_pgoff << PAGE_SHIFT;
403
404         if ((vma->vm_end - vma->vm_start + off) > len) {
405                 return -EINVAL;
406         }
407
408         off += start;
409         vma->vm_pgoff = off >> PAGE_SHIFT;
410
411         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
412         pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
413
414         vma->vm_flags |= VM_IO;
415
416         if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
417                                 vma->vm_end - vma->vm_start,
418                                 vma->vm_page_prot)) {
419                 return -EAGAIN;
420         }
421
422         return 0;
423 }
424
425 static struct fb_ops au1100fb_ops =
426 {
427         .owner                  = THIS_MODULE,
428         .fb_setcolreg           = au1100fb_fb_setcolreg,
429         .fb_blank               = au1100fb_fb_blank,
430         .fb_pan_display         = au1100fb_fb_pan_display,
431         .fb_fillrect            = cfb_fillrect,
432         .fb_copyarea            = cfb_copyarea,
433         .fb_imageblit           = cfb_imageblit,
434         .fb_rotate              = au1100fb_fb_rotate,
435         .fb_mmap                = au1100fb_fb_mmap,
436 };
437
438
439 /*-------------------------------------------------------------------------*/
440
441 /* AU1100 LCD controller device driver */
442
443 int au1100fb_drv_probe(struct device *dev)
444 {
445         struct au1100fb_device *fbdev = NULL;
446         struct resource *regs_res;
447         unsigned long page;
448         u32 sys_clksrc;
449
450         if (!dev)
451                         return -EINVAL;
452
453         /* Allocate new device private */
454         if (!(fbdev = kmalloc(sizeof(struct au1100fb_device), GFP_KERNEL))) {
455                 print_err("fail to allocate device private record");
456                 return -ENOMEM;
457         }
458         memset((void*)fbdev, 0, sizeof(struct au1100fb_device));
459
460         fbdev->panel = &known_lcd_panels[drv_info.panel_idx];
461
462         dev_set_drvdata(dev, (void*)fbdev);
463
464         /* Allocate region for our registers and map them */
465         if (!(regs_res = platform_get_resource(to_platform_device(dev),
466                                         IORESOURCE_MEM, 0))) {
467                 print_err("fail to retrieve registers resource");
468                 return -EFAULT;
469         }
470
471         au1100fb_fix.mmio_start = regs_res->start;
472         au1100fb_fix.mmio_len = regs_res->end - regs_res->start + 1;
473
474         if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
475                                 DRIVER_NAME)) {
476                 print_err("fail to lock memory region at 0x%08lx",
477                                 au1100fb_fix.mmio_start);
478                 return -EBUSY;
479         }
480
481         fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
482
483         print_dbg("Register memory map at %p", fbdev->regs);
484         print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
485
486
487
488         /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
489         fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
490                         (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
491
492         fbdev->fb_mem = dma_alloc_coherent(dev, PAGE_ALIGN(fbdev->fb_len),
493                                         &fbdev->fb_phys, GFP_KERNEL);
494         if (!fbdev->fb_mem) {
495                 print_err("fail to allocate frambuffer (size: %dK))",
496                           fbdev->fb_len / 1024);
497                 return -ENOMEM;
498         }
499
500         au1100fb_fix.smem_start = fbdev->fb_phys;
501         au1100fb_fix.smem_len = fbdev->fb_len;
502
503         /*
504          * Set page reserved so that mmap will work. This is necessary
505          * since we'll be remapping normal memory.
506          */
507         for (page = (unsigned long)fbdev->fb_mem;
508              page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
509              page += PAGE_SIZE) {
510 #if CONFIG_DMA_NONCOHERENT
511                 SetPageReserved(virt_to_page(CAC_ADDR(page)));
512 #else
513                 SetPageReserved(virt_to_page(page));
514 #endif
515         }
516
517         print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
518         print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
519
520         /* Setup LCD clock to AUX (48 MHz) */
521         sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
522         au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
523
524         /* load the panel info into the var struct */
525         au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
526         au1100fb_var.xres = fbdev->panel->xres;
527         au1100fb_var.xres_virtual = au1100fb_var.xres;
528         au1100fb_var.yres = fbdev->panel->yres;
529         au1100fb_var.yres_virtual = au1100fb_var.yres;
530
531         fbdev->info.screen_base = fbdev->fb_mem;
532         fbdev->info.fbops = &au1100fb_ops;
533         fbdev->info.fix = au1100fb_fix;
534
535         if (!(fbdev->info.pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL))) {
536                 return -ENOMEM;
537         }
538         memset(fbdev->info.pseudo_palette, 0, sizeof(u32) * 16);
539
540         if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
541                 print_err("Fail to allocate colormap (%d entries)",
542                            AU1100_LCD_NBR_PALETTE_ENTRIES);
543                 kfree(fbdev->info.pseudo_palette);
544                 return -EFAULT;
545         }
546
547         fbdev->info.var = au1100fb_var;
548
549         /* Set h/w registers */
550         au1100fb_setmode(fbdev);
551
552         /* Register new framebuffer */
553         if (register_framebuffer(&fbdev->info) < 0) {
554                 print_err("cannot register new framebuffer");
555                 goto failed;
556         }
557
558         return 0;
559
560 failed:
561         if (fbdev->regs) {
562                 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
563         }
564         if (fbdev->fb_mem) {
565                 dma_free_noncoherent(dev, fbdev->fb_len, fbdev->fb_mem, fbdev->fb_phys);
566         }
567         if (fbdev->info.cmap.len != 0) {
568                 fb_dealloc_cmap(&fbdev->info.cmap);
569         }
570         kfree(fbdev);
571         dev_set_drvdata(dev, NULL);
572
573         return 0;
574 }
575
576 int au1100fb_drv_remove(struct device *dev)
577 {
578         struct au1100fb_device *fbdev = NULL;
579
580         if (!dev)
581                 return -ENODEV;
582
583         fbdev = (struct au1100fb_device*) dev_get_drvdata(dev);
584
585 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
586         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
587 #endif
588         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
589
590         /* Clean up all probe data */
591         unregister_framebuffer(&fbdev->info);
592
593         release_mem_region(fbdev->regs_phys, fbdev->regs_len);
594
595         dma_free_coherent(dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem, fbdev->fb_phys);
596
597         fb_dealloc_cmap(&fbdev->info.cmap);
598         kfree(fbdev->info.pseudo_palette);
599         kfree((void*)fbdev);
600
601         return 0;
602 }
603
604 #ifdef CONFIG_PM
605 static u32 sys_clksrc;
606 static struct au1100fb_regs fbregs;
607
608 int au1100fb_drv_suspend(struct device *dev, pm_message_t state)
609 {
610         struct au1100fb_device *fbdev = dev_get_drvdata(dev);
611
612         if (!fbdev)
613                 return 0;
614
615         /* Save the clock source state */
616         sys_clksrc = au_readl(SYS_CLKSRC);
617
618         /* Blank the LCD */
619         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
620
621         /* Stop LCD clocking */
622         au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
623
624         memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
625
626         return 0;
627 }
628
629 int au1100fb_drv_resume(struct device *dev)
630 {
631         struct au1100fb_device *fbdev = dev_get_drvdata(dev);
632
633         if (!fbdev)
634                 return 0;
635
636         memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
637
638         /* Restart LCD clocking */
639         au_writel(sys_clksrc, SYS_CLKSRC);
640
641         /* Unblank the LCD */
642         au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
643
644         return 0;
645 }
646 #else
647 #define au1100fb_drv_suspend NULL
648 #define au1100fb_drv_resume NULL
649 #endif
650
651 static struct device_driver au1100fb_driver = {
652         .name           = "au1100-lcd",
653         .bus            = &platform_bus_type,
654
655         .probe          = au1100fb_drv_probe,
656         .remove         = au1100fb_drv_remove,
657         .suspend        = au1100fb_drv_suspend,
658         .resume         = au1100fb_drv_resume,
659 };
660
661 /*-------------------------------------------------------------------------*/
662
663 /* Kernel driver */
664
665 int au1100fb_setup(char *options)
666 {
667         char* this_opt;
668         int num_panels = ARRAY_SIZE(known_lcd_panels);
669         char* mode = NULL;
670         int panel_idx = 0;
671
672         if (num_panels <= 0) {
673                 print_err("No LCD panels supported by driver!");
674                 return -EFAULT;
675                         }
676
677         if (options) {
678                 while ((this_opt = strsep(&options,",")) != NULL) {
679                         /* Panel option */
680                 if (!strncmp(this_opt, "panel:", 6)) {
681                                 int i;
682                                 this_opt += 6;
683                                 for (i = 0; i < num_panels; i++) {
684                                         if (!strncmp(this_opt,
685                                                      known_lcd_panels[i].name,
686                                                         strlen(this_opt))) {
687                                                 panel_idx = i;
688                                         break;
689                                 }
690                         }
691                                 if (i >= num_panels) {
692                                         print_warn("Panel %s not supported!", this_opt);
693                                 }
694                         }
695                         /* Mode option (only option that start with digit) */
696                         else if (isdigit(this_opt[0])) {
697                                 mode = kmalloc(strlen(this_opt) + 1, GFP_KERNEL);
698                                 strncpy(mode, this_opt, strlen(this_opt) + 1);
699                         }
700                         /* Unsupported option */
701                         else {
702                                 print_warn("Unsupported option \"%s\"", this_opt);
703                 }
704                 }
705         }
706
707         drv_info.panel_idx = panel_idx;
708         drv_info.opt_mode = mode;
709
710         print_info("Panel=%s Mode=%s",
711                         known_lcd_panels[drv_info.panel_idx].name,
712                         drv_info.opt_mode ? drv_info.opt_mode : "default");
713
714         return 0;
715 }
716
717 int __init au1100fb_init(void)
718 {
719         char* options;
720         int ret;
721
722         print_info("" DRIVER_DESC "");
723
724         memset(&drv_info, 0, sizeof(drv_info));
725
726         if (fb_get_options(DRIVER_NAME, &options))
727                 return -ENODEV;
728
729         /* Setup driver with options */
730         ret = au1100fb_setup(options);
731         if (ret < 0) {
732                 print_err("Fail to setup driver");
733                 return ret;
734         }
735
736         return driver_register(&au1100fb_driver);
737 }
738
739 void __exit au1100fb_cleanup(void)
740 {
741         driver_unregister(&au1100fb_driver);
742
743         kfree(drv_info.opt_mode);
744 }
745
746 module_init(au1100fb_init);
747 module_exit(au1100fb_cleanup);
748
749 MODULE_DESCRIPTION(DRIVER_DESC);
750 MODULE_LICENSE("GPL");