drm/nouveau: warn when moving a pinned object
[firefly-linux-kernel-4.4.55.git] / drivers / video / fbdev / 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/clk.h>
45 #include <linux/module.h>
46 #include <linux/kernel.h>
47 #include <linux/errno.h>
48 #include <linux/string.h>
49 #include <linux/mm.h>
50 #include <linux/fb.h>
51 #include <linux/init.h>
52 #include <linux/interrupt.h>
53 #include <linux/ctype.h>
54 #include <linux/dma-mapping.h>
55 #include <linux/platform_device.h>
56 #include <linux/slab.h>
57
58 #include <asm/mach-au1x00/au1000.h>
59
60 #define DEBUG 0
61
62 #include "au1100fb.h"
63
64 #define DRIVER_NAME "au1100fb"
65 #define DRIVER_DESC "LCD controller driver for AU1100 processors"
66
67 #define to_au1100fb_device(_info) \
68           (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
69
70 /* Bitfields format supported by the controller. Note that the order of formats
71  * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
72  * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
73  */
74 struct fb_bitfield rgb_bitfields[][4] =
75 {
76         /*     Red,        Green,        Blue,       Transp   */
77         { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
78         { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
79         { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
80         { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
81         { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
82
83         /* The last is used to describe 12bpp format */
84         { { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
85 };
86
87 static struct fb_fix_screeninfo au1100fb_fix = {
88         .id             = "AU1100 FB",
89         .xpanstep       = 1,
90         .ypanstep       = 1,
91         .type           = FB_TYPE_PACKED_PIXELS,
92         .accel          = FB_ACCEL_NONE,
93 };
94
95 static struct fb_var_screeninfo au1100fb_var = {
96         .activate       = FB_ACTIVATE_NOW,
97         .height         = -1,
98         .width          = -1,
99         .vmode          = FB_VMODE_NONINTERLACED,
100 };
101
102 /* fb_blank
103  * Blank the screen. Depending on the mode, the screen will be
104  * activated with the backlight color, or desactivated
105  */
106 static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
107 {
108         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
109
110         print_dbg("fb_blank %d %p", blank_mode, fbi);
111
112         switch (blank_mode) {
113
114         case VESA_NO_BLANKING:
115                 /* Turn on panel */
116                 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
117                 wmb(); /* drain writebuffer */
118                 break;
119
120         case VESA_VSYNC_SUSPEND:
121         case VESA_HSYNC_SUSPEND:
122         case VESA_POWERDOWN:
123                 /* Turn off panel */
124                 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
125                 wmb(); /* drain writebuffer */
126                 break;
127         default:
128                 break;
129
130         }
131         return 0;
132 }
133
134 /*
135  * Set hardware with var settings. This will enable the controller with a specific
136  * mode, normally validated with the fb_check_var method
137          */
138 int au1100fb_setmode(struct au1100fb_device *fbdev)
139 {
140         struct fb_info *info = &fbdev->info;
141         u32 words;
142         int index;
143
144         if (!fbdev)
145                 return -EINVAL;
146
147         /* Update var-dependent FB info */
148         if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
149                 if (info->var.bits_per_pixel <= 8) {
150                         /* palettized */
151                         info->var.red.offset    = 0;
152                         info->var.red.length    = info->var.bits_per_pixel;
153                         info->var.red.msb_right = 0;
154
155                         info->var.green.offset  = 0;
156                         info->var.green.length  = info->var.bits_per_pixel;
157                         info->var.green.msb_right = 0;
158
159                         info->var.blue.offset   = 0;
160                         info->var.blue.length   = info->var.bits_per_pixel;
161                         info->var.blue.msb_right = 0;
162
163                         info->var.transp.offset = 0;
164                         info->var.transp.length = 0;
165                         info->var.transp.msb_right = 0;
166
167                         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
168                         info->fix.line_length = info->var.xres_virtual /
169                                                         (8/info->var.bits_per_pixel);
170                 } else {
171                         /* non-palettized */
172                         index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
173                         info->var.red = rgb_bitfields[index][0];
174                         info->var.green = rgb_bitfields[index][1];
175                         info->var.blue = rgb_bitfields[index][2];
176                         info->var.transp = rgb_bitfields[index][3];
177
178                         info->fix.visual = FB_VISUAL_TRUECOLOR;
179                         info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
180                 }
181         } else {
182                 /* mono */
183                 info->fix.visual = FB_VISUAL_MONO10;
184                 info->fix.line_length = info->var.xres_virtual / 8;
185         }
186
187         info->screen_size = info->fix.line_length * info->var.yres_virtual;
188         info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
189                                 >> LCD_CONTROL_SM_BIT) * 90;
190
191         /* Determine BPP mode and format */
192         fbdev->regs->lcd_control = fbdev->panel->control_base;
193         fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
194         fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
195         fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
196         fbdev->regs->lcd_intenable = 0;
197         fbdev->regs->lcd_intstatus = 0;
198         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
199
200         if (panel_is_dual(fbdev->panel)) {
201                 /* Second panel display seconf half of screen if possible,
202                  * otherwise display the same as the first panel */
203                 if (info->var.yres_virtual >= (info->var.yres << 1)) {
204                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
205                                                           (info->fix.line_length *
206                                                           (info->var.yres_virtual >> 1)));
207                 } else {
208                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
209                 }
210         }
211
212         words = info->fix.line_length / sizeof(u32);
213         if (!info->var.rotate || (info->var.rotate == 180)) {
214                 words *= info->var.yres_virtual;
215                 if (info->var.rotate /* 180 */) {
216                         words -= (words % 8); /* should be divisable by 8 */
217                 }
218         }
219         fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
220
221         fbdev->regs->lcd_pwmdiv = 0;
222         fbdev->regs->lcd_pwmhi = 0;
223
224         /* Resume controller */
225         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
226         mdelay(10);
227         au1100fb_fb_blank(VESA_NO_BLANKING, info);
228
229         return 0;
230 }
231
232 /* fb_setcolreg
233  * Set color in LCD palette.
234  */
235 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
236 {
237         struct au1100fb_device *fbdev;
238         u32 *palette;
239         u32 value;
240
241         fbdev = to_au1100fb_device(fbi);
242         palette = fbdev->regs->lcd_pallettebase;
243
244         if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
245                 return -EINVAL;
246
247         if (fbi->var.grayscale) {
248                 /* Convert color to grayscale */
249                 red = green = blue =
250                         (19595 * red + 38470 * green + 7471 * blue) >> 16;
251         }
252
253         if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
254                 /* Place color in the pseudopalette */
255                 if (regno > 16)
256                         return -EINVAL;
257
258                 palette = (u32*)fbi->pseudo_palette;
259
260                 red   >>= (16 - fbi->var.red.length);
261                 green >>= (16 - fbi->var.green.length);
262                 blue  >>= (16 - fbi->var.blue.length);
263
264                 value = (red   << fbi->var.red.offset)  |
265                         (green << fbi->var.green.offset)|
266                         (blue  << fbi->var.blue.offset);
267                 value &= 0xFFFF;
268
269         } else if (panel_is_active(fbdev->panel)) {
270                 /* COLOR TFT PALLETTIZED (use RGB 565) */
271                 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
272                 value &= 0xFFFF;
273
274         } else if (panel_is_color(fbdev->panel)) {
275                 /* COLOR STN MODE */
276                 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
277                         ((green >> 8) & 0x00F0) |
278                         (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
279                 value &= 0xFFF;
280         } else {
281                 /* MONOCHROME MODE */
282                 value = (green >> 12) & 0x000F;
283                 value &= 0xF;
284         }
285
286         palette[regno] = value;
287
288         return 0;
289 }
290
291 /* fb_pan_display
292  * Pan display in x and/or y as specified
293  */
294 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
295 {
296         struct au1100fb_device *fbdev;
297         int dy;
298
299         fbdev = to_au1100fb_device(fbi);
300
301         print_dbg("fb_pan_display %p %p", var, fbi);
302
303         if (!var || !fbdev) {
304                 return -EINVAL;
305         }
306
307         if (var->xoffset - fbi->var.xoffset) {
308                 /* No support for X panning for now! */
309                 return -EINVAL;
310         }
311
312         print_dbg("fb_pan_display 2 %p %p", var, fbi);
313         dy = var->yoffset - fbi->var.yoffset;
314         if (dy) {
315
316                 u32 dmaaddr;
317
318                 print_dbg("Panning screen of %d lines", dy);
319
320                 dmaaddr = fbdev->regs->lcd_dmaaddr0;
321                 dmaaddr += (fbi->fix.line_length * dy);
322
323                 /* TODO: Wait for current frame to finished */
324                 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
325
326                 if (panel_is_dual(fbdev->panel)) {
327                         dmaaddr = fbdev->regs->lcd_dmaaddr1;
328                         dmaaddr += (fbi->fix.line_length * dy);
329                         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
330         }
331         }
332         print_dbg("fb_pan_display 3 %p %p", var, fbi);
333
334         return 0;
335 }
336
337 /* fb_rotate
338  * Rotate the display of this angle. This doesn't seems to be used by the core,
339  * but as our hardware supports it, so why not implementing it...
340  */
341 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
342 {
343         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
344
345         print_dbg("fb_rotate %p %d", fbi, angle);
346
347         if (fbdev && (angle > 0) && !(angle % 90)) {
348
349                 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
350
351                 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
352                 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
353
354                 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
355         }
356 }
357
358 /* fb_mmap
359  * Map video memory in user space. We don't use the generic fb_mmap method mainly
360  * to allow the use of the TLB streaming flag (CCA=6)
361  */
362 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
363 {
364         struct au1100fb_device *fbdev;
365
366         fbdev = to_au1100fb_device(fbi);
367
368         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
369         pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
370
371         return vm_iomap_memory(vma, fbdev->fb_phys, fbdev->fb_len);
372 }
373
374 static struct fb_ops au1100fb_ops =
375 {
376         .owner                  = THIS_MODULE,
377         .fb_setcolreg           = au1100fb_fb_setcolreg,
378         .fb_blank               = au1100fb_fb_blank,
379         .fb_pan_display         = au1100fb_fb_pan_display,
380         .fb_fillrect            = cfb_fillrect,
381         .fb_copyarea            = cfb_copyarea,
382         .fb_imageblit           = cfb_imageblit,
383         .fb_rotate              = au1100fb_fb_rotate,
384         .fb_mmap                = au1100fb_fb_mmap,
385 };
386
387
388 /*-------------------------------------------------------------------------*/
389
390 static int au1100fb_setup(struct au1100fb_device *fbdev)
391 {
392         char *this_opt, *options;
393         int num_panels = ARRAY_SIZE(known_lcd_panels);
394
395         if (num_panels <= 0) {
396                 print_err("No LCD panels supported by driver!");
397                 return -ENODEV;
398         }
399
400         if (fb_get_options(DRIVER_NAME, &options))
401                 return -ENODEV;
402         if (!options)
403                 return -ENODEV;
404
405         while ((this_opt = strsep(&options, ",")) != NULL) {
406                 /* Panel option */
407                 if (!strncmp(this_opt, "panel:", 6)) {
408                         int i;
409                         this_opt += 6;
410                         for (i = 0; i < num_panels; i++) {
411                                 if (!strncmp(this_opt, known_lcd_panels[i].name,
412                                              strlen(this_opt))) {
413                                         fbdev->panel = &known_lcd_panels[i];
414                                         fbdev->panel_idx = i;
415                                         break;
416                                 }
417                         }
418                         if (i >= num_panels) {
419                                 print_warn("Panel '%s' not supported!", this_opt);
420                                 return -ENODEV;
421                         }
422                 }
423                 /* Unsupported option */
424                 else
425                         print_warn("Unsupported option \"%s\"", this_opt);
426         }
427
428         print_info("Panel=%s", fbdev->panel->name);
429
430         return 0;
431 }
432
433 static int au1100fb_drv_probe(struct platform_device *dev)
434 {
435         struct au1100fb_device *fbdev = NULL;
436         struct resource *regs_res;
437         unsigned long page;
438         struct clk *c;
439
440         /* Allocate new device private */
441         fbdev = devm_kzalloc(&dev->dev, sizeof(struct au1100fb_device),
442                              GFP_KERNEL);
443         if (!fbdev) {
444                 print_err("fail to allocate device private record");
445                 return -ENOMEM;
446         }
447
448         if (au1100fb_setup(fbdev))
449                 goto failed;
450
451         platform_set_drvdata(dev, (void *)fbdev);
452
453         /* Allocate region for our registers and map them */
454         regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
455         if (!regs_res) {
456                 print_err("fail to retrieve registers resource");
457                 return -EFAULT;
458         }
459
460         au1100fb_fix.mmio_start = regs_res->start;
461         au1100fb_fix.mmio_len = resource_size(regs_res);
462
463         if (!devm_request_mem_region(&dev->dev,
464                                      au1100fb_fix.mmio_start,
465                                      au1100fb_fix.mmio_len,
466                                      DRIVER_NAME)) {
467                 print_err("fail to lock memory region at 0x%08lx",
468                                 au1100fb_fix.mmio_start);
469                 return -EBUSY;
470         }
471
472         fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
473
474         print_dbg("Register memory map at %p", fbdev->regs);
475         print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
476
477         c = clk_get(NULL, "lcd_intclk");
478         if (!IS_ERR(c)) {
479                 fbdev->lcdclk = c;
480                 clk_set_rate(c, 48000000);
481                 clk_prepare_enable(c);
482         }
483
484         /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
485         fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
486                         (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
487
488         fbdev->fb_mem = dmam_alloc_coherent(&dev->dev,
489                                             PAGE_ALIGN(fbdev->fb_len),
490                                             &fbdev->fb_phys, GFP_KERNEL);
491         if (!fbdev->fb_mem) {
492                 print_err("fail to allocate frambuffer (size: %dK))",
493                           fbdev->fb_len / 1024);
494                 return -ENOMEM;
495         }
496
497         au1100fb_fix.smem_start = fbdev->fb_phys;
498         au1100fb_fix.smem_len = fbdev->fb_len;
499
500         /*
501          * Set page reserved so that mmap will work. This is necessary
502          * since we'll be remapping normal memory.
503          */
504         for (page = (unsigned long)fbdev->fb_mem;
505              page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
506              page += PAGE_SIZE) {
507 #ifdef CONFIG_DMA_NONCOHERENT
508                 SetPageReserved(virt_to_page(CAC_ADDR((void *)page)));
509 #else
510                 SetPageReserved(virt_to_page(page));
511 #endif
512         }
513
514         print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
515         print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
516
517         /* load the panel info into the var struct */
518         au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
519         au1100fb_var.xres = fbdev->panel->xres;
520         au1100fb_var.xres_virtual = au1100fb_var.xres;
521         au1100fb_var.yres = fbdev->panel->yres;
522         au1100fb_var.yres_virtual = au1100fb_var.yres;
523
524         fbdev->info.screen_base = fbdev->fb_mem;
525         fbdev->info.fbops = &au1100fb_ops;
526         fbdev->info.fix = au1100fb_fix;
527
528         fbdev->info.pseudo_palette =
529                 devm_kzalloc(&dev->dev, sizeof(u32) * 16, GFP_KERNEL);
530         if (!fbdev->info.pseudo_palette)
531                 return -ENOMEM;
532
533         if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
534                 print_err("Fail to allocate colormap (%d entries)",
535                            AU1100_LCD_NBR_PALETTE_ENTRIES);
536                 return -EFAULT;
537         }
538
539         fbdev->info.var = au1100fb_var;
540
541         /* Set h/w registers */
542         au1100fb_setmode(fbdev);
543
544         /* Register new framebuffer */
545         if (register_framebuffer(&fbdev->info) < 0) {
546                 print_err("cannot register new framebuffer");
547                 goto failed;
548         }
549
550         return 0;
551
552 failed:
553         if (fbdev->lcdclk) {
554                 clk_disable_unprepare(fbdev->lcdclk);
555                 clk_put(fbdev->lcdclk);
556         }
557         if (fbdev->fb_mem) {
558                 dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem,
559                                      fbdev->fb_phys);
560         }
561         if (fbdev->info.cmap.len != 0) {
562                 fb_dealloc_cmap(&fbdev->info.cmap);
563         }
564
565         return -ENODEV;
566 }
567
568 int au1100fb_drv_remove(struct platform_device *dev)
569 {
570         struct au1100fb_device *fbdev = NULL;
571
572         if (!dev)
573                 return -ENODEV;
574
575         fbdev = platform_get_drvdata(dev);
576
577 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
578         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
579 #endif
580         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
581
582         /* Clean up all probe data */
583         unregister_framebuffer(&fbdev->info);
584
585         fb_dealloc_cmap(&fbdev->info.cmap);
586
587         if (fbdev->lcdclk) {
588                 clk_disable_unprepare(fbdev->lcdclk);
589                 clk_put(fbdev->lcdclk);
590         }
591
592         return 0;
593 }
594
595 #ifdef CONFIG_PM
596 static struct au1100fb_regs fbregs;
597
598 int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
599 {
600         struct au1100fb_device *fbdev = platform_get_drvdata(dev);
601
602         if (!fbdev)
603                 return 0;
604
605         /* Blank the LCD */
606         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
607
608         if (fbdev->lcdclk)
609                 clk_disable(fbdev->lcdclk);
610
611         memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
612
613         return 0;
614 }
615
616 int au1100fb_drv_resume(struct platform_device *dev)
617 {
618         struct au1100fb_device *fbdev = platform_get_drvdata(dev);
619
620         if (!fbdev)
621                 return 0;
622
623         memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
624
625         if (fbdev->lcdclk)
626                 clk_enable(fbdev->lcdclk);
627
628         /* Unblank the LCD */
629         au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
630
631         return 0;
632 }
633 #else
634 #define au1100fb_drv_suspend NULL
635 #define au1100fb_drv_resume NULL
636 #endif
637
638 static struct platform_driver au1100fb_driver = {
639         .driver = {
640                 .name           = "au1100-lcd",
641                 .owner          = THIS_MODULE,
642         },
643         .probe          = au1100fb_drv_probe,
644         .remove         = au1100fb_drv_remove,
645         .suspend        = au1100fb_drv_suspend,
646         .resume         = au1100fb_drv_resume,
647 };
648 module_platform_driver(au1100fb_driver);
649
650 MODULE_DESCRIPTION(DRIVER_DESC);
651 MODULE_LICENSE("GPL");