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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / video / au1100fb.c
blobde9da6774fd9e51f237ba7adc0aa8319ae8b6eec
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 #define DRIVER_NAME "au1100fb"
64 #define DRIVER_DESC "LCD controller driver for AU1100 processors"
65
66 #define to_au1100fb_device(_info) \
67 (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
68
69 /* Bitfields format supported by the controller. Note that the order of formats
70 * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
71 * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
72 */
73 struct fb_bitfield rgb_bitfields[][4] =
74 {
75 /* Red, Green, Blue, Transp */
76 { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
77 { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
78 { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
79 { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
80 { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
81
82 /* The last is used to describe 12bpp format */
83 { { 8, 4, 0 }, { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
84 };
85
86 static struct fb_fix_screeninfo au1100fb_fix __devinitdata = {
87 .id = "AU1100 FB",
88 .xpanstep = 1,
89 .ypanstep = 1,
90 .type = FB_TYPE_PACKED_PIXELS,
91 .accel = FB_ACCEL_NONE,
92 };
93
94 static struct fb_var_screeninfo au1100fb_var __devinitdata = {
95 .activate = FB_ACTIVATE_NOW,
96 .height = -1,
97 .width = -1,
98 .vmode = FB_VMODE_NONINTERLACED,
99 };
100
101 /* fb_blank
102 * Blank the screen. Depending on the mode, the screen will be
103 * activated with the backlight color, or desactivated
104 */
105 static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
106 {
107 struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
108
109 print_dbg("fb_blank %d %p", blank_mode, fbi);
110
111 switch (blank_mode) {
112
113 case VESA_NO_BLANKING:
114 /* Turn on panel */
115 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
116 #ifdef CONFIG_MIPS_PB1100
117 if (fbdev->panel_idx == 1) {
118 au_writew(au_readw(PB1100_G_CONTROL)
119 | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
120 PB1100_G_CONTROL);
121 }
122 #endif
123 au_sync();
124 break;
125
126 case VESA_VSYNC_SUSPEND:
127 case VESA_HSYNC_SUSPEND:
128 case VESA_POWERDOWN:
129 /* Turn off panel */
130 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
131 #ifdef CONFIG_MIPS_PB1100
132 if (fbdev->panel_idx == 1) {
133 au_writew(au_readw(PB1100_G_CONTROL)
134 & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
135 PB1100_G_CONTROL);
136 }
137 #endif
138 au_sync();
139 break;
140 default:
141 break;
142
143 }
144 return 0;
145 }
146
147 /*
148 * Set hardware with var settings. This will enable the controller with a specific
149 * mode, normally validated with the fb_check_var method
150 */
151 int au1100fb_setmode(struct au1100fb_device *fbdev)
152 {
153 struct fb_info *info = &fbdev->info;
154 u32 words;
155 int index;
156
157 if (!fbdev)
158 return -EINVAL;
159
160 /* Update var-dependent FB info */
161 if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
162 if (info->var.bits_per_pixel <= 8) {
163 /* palettized */
164 info->var.red.offset = 0;
165 info->var.red.length = info->var.bits_per_pixel;
166 info->var.red.msb_right = 0;
167
168 info->var.green.offset = 0;
169 info->var.green.length = info->var.bits_per_pixel;
170 info->var.green.msb_right = 0;
171
172 info->var.blue.offset = 0;
173 info->var.blue.length = info->var.bits_per_pixel;
174 info->var.blue.msb_right = 0;
175
176 info->var.transp.offset = 0;
177 info->var.transp.length = 0;
178 info->var.transp.msb_right = 0;
179
180 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
181 info->fix.line_length = info->var.xres_virtual /
182 (8/info->var.bits_per_pixel);
183 } else {
184 /* non-palettized */
185 index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
186 info->var.red = rgb_bitfields[index][0];
187 info->var.green = rgb_bitfields[index][1];
188 info->var.blue = rgb_bitfields[index][2];
189 info->var.transp = rgb_bitfields[index][3];
190
191 info->fix.visual = FB_VISUAL_TRUECOLOR;
192 info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
193 }
194 } else {
195 /* mono */
196 info->fix.visual = FB_VISUAL_MONO10;
197 info->fix.line_length = info->var.xres_virtual / 8;
198 }
199
200 info->screen_size = info->fix.line_length * info->var.yres_virtual;
201 info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
202 >> LCD_CONTROL_SM_BIT) * 90;
203
204 /* Determine BPP mode and format */
205 fbdev->regs->lcd_control = fbdev->panel->control_base;
206 fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
207 fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
208 fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
209 fbdev->regs->lcd_intenable = 0;
210 fbdev->regs->lcd_intstatus = 0;
211 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
212
213 if (panel_is_dual(fbdev->panel)) {
214 /* Second panel display seconf half of screen if possible,
215 * otherwise display the same as the first panel */
216 if (info->var.yres_virtual >= (info->var.yres << 1)) {
217 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
218 (info->fix.line_length *
219 (info->var.yres_virtual >> 1)));
220 } else {
221 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
222 }
223 }
224
225 words = info->fix.line_length / sizeof(u32);
226 if (!info->var.rotate || (info->var.rotate == 180)) {
227 words *= info->var.yres_virtual;
228 if (info->var.rotate /* 180 */) {
229 words -= (words % 8); /* should be divisable by 8 */
230 }
231 }
232 fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
233
234 fbdev->regs->lcd_pwmdiv = 0;
235 fbdev->regs->lcd_pwmhi = 0;
236
237 /* Resume controller */
238 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
239 mdelay(10);
240 au1100fb_fb_blank(VESA_NO_BLANKING, info);
241
242 return 0;
243 }
244
245 /* fb_setcolreg
246 * Set color in LCD palette.
247 */
248 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
249 {
250 struct au1100fb_device *fbdev;
251 u32 *palette;
252 u32 value;
253
254 fbdev = to_au1100fb_device(fbi);
255 palette = fbdev->regs->lcd_pallettebase;
256
257 if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
258 return -EINVAL;
259
260 if (fbi->var.grayscale) {
261 /* Convert color to grayscale */
262 red = green = blue =
263 (19595 * red + 38470 * green + 7471 * blue) >> 16;
264 }
265
266 if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
267 /* Place color in the pseudopalette */
268 if (regno > 16)
269 return -EINVAL;
270
271 palette = (u32*)fbi->pseudo_palette;
272
273 red >>= (16 - fbi->var.red.length);
274 green >>= (16 - fbi->var.green.length);
275 blue >>= (16 - fbi->var.blue.length);
276
277 value = (red << fbi->var.red.offset) |
278 (green << fbi->var.green.offset)|
279 (blue << fbi->var.blue.offset);
280 value &= 0xFFFF;
281
282 } else if (panel_is_active(fbdev->panel)) {
283 /* COLOR TFT PALLETTIZED (use RGB 565) */
284 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
285 value &= 0xFFFF;
286
287 } else if (panel_is_color(fbdev->panel)) {
288 /* COLOR STN MODE */
289 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
290 ((green >> 8) & 0x00F0) |
291 (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
292 value &= 0xFFF;
293 } else {
294 /* MONOCHROME MODE */
295 value = (green >> 12) & 0x000F;
296 value &= 0xF;
297 }
298
299 palette[regno] = value;
300
301 return 0;
302 }
303
304 /* fb_pan_display
305 * Pan display in x and/or y as specified
306 */
307 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
308 {
309 struct au1100fb_device *fbdev;
310 int dy;
311
312 fbdev = to_au1100fb_device(fbi);
313
314 print_dbg("fb_pan_display %p %p", var, fbi);
315
316 if (!var || !fbdev) {
317 return -EINVAL;
318 }
319
320 if (var->xoffset - fbi->var.xoffset) {
321 /* No support for X panning for now! */
322 return -EINVAL;
323 }
324
325 print_dbg("fb_pan_display 2 %p %p", var, fbi);
326 dy = var->yoffset - fbi->var.yoffset;
327 if (dy) {
328
329 u32 dmaaddr;
330
331 print_dbg("Panning screen of %d lines", dy);
332
333 dmaaddr = fbdev->regs->lcd_dmaaddr0;
334 dmaaddr += (fbi->fix.line_length * dy);
335
336 /* TODO: Wait for current frame to finished */
337 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
338
339 if (panel_is_dual(fbdev->panel)) {
340 dmaaddr = fbdev->regs->lcd_dmaaddr1;
341 dmaaddr += (fbi->fix.line_length * dy);
342 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
343 }
344 }
345 print_dbg("fb_pan_display 3 %p %p", var, fbi);
346
347 return 0;
348 }
349
350 /* fb_rotate
351 * Rotate the display of this angle. This doesn't seems to be used by the core,
352 * but as our hardware supports it, so why not implementing it...
353 */
354 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
355 {
356 struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
357
358 print_dbg("fb_rotate %p %d", fbi, angle);
359
360 if (fbdev && (angle > 0) && !(angle % 90)) {
361
362 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
363
364 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
365 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
366
367 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
368 }
369 }
370
371 /* fb_mmap
372 * Map video memory in user space. We don't use the generic fb_mmap method mainly
373 * to allow the use of the TLB streaming flag (CCA=6)
374 */
375 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
376 {
377 struct au1100fb_device *fbdev;
378 unsigned int len;
379 unsigned long start=0, off;
380
381 fbdev = to_au1100fb_device(fbi);
382
383 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
384 return -EINVAL;
385 }
386
387 start = fbdev->fb_phys & PAGE_MASK;
388 len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
389
390 off = vma->vm_pgoff << PAGE_SHIFT;
391
392 if ((vma->vm_end - vma->vm_start + off) > len) {
393 return -EINVAL;
394 }
395
396 off += start;
397 vma->vm_pgoff = off >> PAGE_SHIFT;
398
399 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
400 pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
401
402 vma->vm_flags |= VM_IO;
403
404 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
405 vma->vm_end - vma->vm_start,
406 vma->vm_page_prot)) {
407 return -EAGAIN;
408 }
409
410 return 0;
411 }
412
413 static struct fb_ops au1100fb_ops =
414 {
415 .owner = THIS_MODULE,
416 .fb_setcolreg = au1100fb_fb_setcolreg,
417 .fb_blank = au1100fb_fb_blank,
418 .fb_pan_display = au1100fb_fb_pan_display,
419 .fb_fillrect = cfb_fillrect,
420 .fb_copyarea = cfb_copyarea,
421 .fb_imageblit = cfb_imageblit,
422 .fb_rotate = au1100fb_fb_rotate,
423 .fb_mmap = au1100fb_fb_mmap,
424 };
425
426
427 /*-------------------------------------------------------------------------*/
428
429 static int au1100fb_setup(struct au1100fb_device *fbdev)
430 {
431 char *this_opt, *options;
432 int num_panels = ARRAY_SIZE(known_lcd_panels);
433
434 if (num_panels <= 0) {
435 print_err("No LCD panels supported by driver!");
436 return -ENODEV;
437 }
438
439 if (fb_get_options(DRIVER_NAME, &options))
440 return -ENODEV;
441 if (!options)
442 return -ENODEV;
443
444 while ((this_opt = strsep(&options, ",")) != NULL) {
445 /* Panel option */
446 if (!strncmp(this_opt, "panel:", 6)) {
447 int i;
448 this_opt += 6;
449 for (i = 0; i < num_panels; i++) {
450 if (!strncmp(this_opt, known_lcd_panels[i].name,
451 strlen(this_opt))) {
452 fbdev->panel = &known_lcd_panels[i];
453 fbdev->panel_idx = i;
454 break;
455 }
456 }
457 if (i >= num_panels) {
458 print_warn("Panel '%s' not supported!", this_opt);
459 return -ENODEV;
460 }
461 }
462 /* Unsupported option */
463 else
464 print_warn("Unsupported option \"%s\"", this_opt);
465 }
466
467 print_info("Panel=%s", fbdev->panel->name);
468
469 return 0;
470 }
471
472 static int __devinit au1100fb_drv_probe(struct platform_device *dev)
473 {
474 struct au1100fb_device *fbdev = NULL;
475 struct resource *regs_res;
476 unsigned long page;
477 u32 sys_clksrc;
478
479 /* Allocate new device private */
480 fbdev = kzalloc(sizeof(struct au1100fb_device), GFP_KERNEL);
481 if (!fbdev) {
482 print_err("fail to allocate device private record");
483 return -ENOMEM;
484 }
485
486 if (au1100fb_setup(fbdev))
487 goto failed;
488
489 platform_set_drvdata(dev, (void *)fbdev);
490
491 /* Allocate region for our registers and map them */
492 regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
493 if (!regs_res) {
494 print_err("fail to retrieve registers resource");
495 return -EFAULT;
496 }
497
498 au1100fb_fix.mmio_start = regs_res->start;
499 au1100fb_fix.mmio_len = resource_size(regs_res);
500
501 if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
502 DRIVER_NAME)) {
503 print_err("fail to lock memory region at 0x%08lx",
504 au1100fb_fix.mmio_start);
505 return -EBUSY;
506 }
507
508 fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
509
510 print_dbg("Register memory map at %p", fbdev->regs);
511 print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
512
513 /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
514 fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
515 (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
516
517 fbdev->fb_mem = dma_alloc_coherent(&dev->dev, PAGE_ALIGN(fbdev->fb_len),
518 &fbdev->fb_phys, GFP_KERNEL);
519 if (!fbdev->fb_mem) {
520 print_err("fail to allocate frambuffer (size: %dK))",
521 fbdev->fb_len / 1024);
522 return -ENOMEM;
523 }
524
525 au1100fb_fix.smem_start = fbdev->fb_phys;
526 au1100fb_fix.smem_len = fbdev->fb_len;
527
528 /*
529 * Set page reserved so that mmap will work. This is necessary
530 * since we'll be remapping normal memory.
531 */
532 for (page = (unsigned long)fbdev->fb_mem;
533 page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
534 page += PAGE_SIZE) {
535 #if CONFIG_DMA_NONCOHERENT
536 SetPageReserved(virt_to_page(CAC_ADDR((void *)page)));
537 #else
538 SetPageReserved(virt_to_page(page));
539 #endif
540 }
541
542 print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
543 print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
544
545 /* Setup LCD clock to AUX (48 MHz) */
546 sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
547 au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
548
549 /* load the panel info into the var struct */
550 au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
551 au1100fb_var.xres = fbdev->panel->xres;
552 au1100fb_var.xres_virtual = au1100fb_var.xres;
553 au1100fb_var.yres = fbdev->panel->yres;
554 au1100fb_var.yres_virtual = au1100fb_var.yres;
555
556 fbdev->info.screen_base = fbdev->fb_mem;
557 fbdev->info.fbops = &au1100fb_ops;
558 fbdev->info.fix = au1100fb_fix;
559
560 if (!(fbdev->info.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL))) {
561 return -ENOMEM;
562 }
563
564 if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
565 print_err("Fail to allocate colormap (%d entries)",
566 AU1100_LCD_NBR_PALETTE_ENTRIES);
567 kfree(fbdev->info.pseudo_palette);
568 return -EFAULT;
569 }
570
571 fbdev->info.var = au1100fb_var;
572
573 /* Set h/w registers */
574 au1100fb_setmode(fbdev);
575
576 /* Register new framebuffer */
577 if (register_framebuffer(&fbdev->info) < 0) {
578 print_err("cannot register new framebuffer");
579 goto failed;
580 }
581
582 return 0;
583
584 failed:
585 if (fbdev->regs) {
586 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
587 }
588 if (fbdev->fb_mem) {
589 dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem,
590 fbdev->fb_phys);
591 }
592 if (fbdev->info.cmap.len != 0) {
593 fb_dealloc_cmap(&fbdev->info.cmap);
594 }
595 kfree(fbdev);
596 platform_set_drvdata(dev, NULL);
597
598 return 0;
599 }
600
601 int au1100fb_drv_remove(struct platform_device *dev)
602 {
603 struct au1100fb_device *fbdev = NULL;
604
605 if (!dev)
606 return -ENODEV;
607
608 fbdev = (struct au1100fb_device *) platform_get_drvdata(dev);
609
610 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
611 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
612 #endif
613 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
614
615 /* Clean up all probe data */
616 unregister_framebuffer(&fbdev->info);
617
618 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
619
620 dma_free_coherent(&dev->dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem,
621 fbdev->fb_phys);
622
623 fb_dealloc_cmap(&fbdev->info.cmap);
624 kfree(fbdev->info.pseudo_palette);
625 kfree((void*)fbdev);
626
627 return 0;
628 }
629
630 #ifdef CONFIG_PM
631 static u32 sys_clksrc;
632 static struct au1100fb_regs fbregs;
633
634 int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
635 {
636 struct au1100fb_device *fbdev = platform_get_drvdata(dev);
637
638 if (!fbdev)
639 return 0;
640
641 /* Save the clock source state */
642 sys_clksrc = au_readl(SYS_CLKSRC);
643
644 /* Blank the LCD */
645 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
646
647 /* Stop LCD clocking */
648 au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
649
650 memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
651
652 return 0;
653 }
654
655 int au1100fb_drv_resume(struct platform_device *dev)
656 {
657 struct au1100fb_device *fbdev = platform_get_drvdata(dev);
658
659 if (!fbdev)
660 return 0;
661
662 memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
663
664 /* Restart LCD clocking */
665 au_writel(sys_clksrc, SYS_CLKSRC);
666
667 /* Unblank the LCD */
668 au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
669
670 return 0;
671 }
672 #else
673 #define au1100fb_drv_suspend NULL
674 #define au1100fb_drv_resume NULL
675 #endif
676
677 static struct platform_driver au1100fb_driver = {
678 .driver = {
679 .name = "au1100-lcd",
680 .owner = THIS_MODULE,
681 },
682 .probe = au1100fb_drv_probe,
683 .remove = au1100fb_drv_remove,
684 .suspend = au1100fb_drv_suspend,
685 .resume = au1100fb_drv_resume,
686 };
687
688 static int __init au1100fb_load(void)
689 {
690 return platform_driver_register(&au1100fb_driver);
691 }
692
693 static void __exit au1100fb_unload(void)
694 {
695 platform_driver_unregister(&au1100fb_driver);
696 }
697
698 module_init(au1100fb_load);
699 module_exit(au1100fb_unload);
700
701 MODULE_DESCRIPTION(DRIVER_DESC);
702 MODULE_LICENSE("GPL");