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freezer: don't unnecessarily set PF_NOFREEZE explicitly
[linux-2.6.git] / drivers / video / au1100fb.c
blob649cb35de4ed401d2ffce0e1c5abcaeb71f4037a
1 /*
2 * BRIEF MODULE DESCRIPTION
3 * Au1100 LCD Driver.
4 *
5 * Rewritten for 2.6 by Embedded Alley Solutions
6 * <source@embeddedalley.com>, based on submissions by
7 * Karl Lessard <klessard@sunrisetelecom.com>
8 * <c.pellegrin@exadron.com>
9 *
10 * PM support added by Rodolfo Giometti <giometti@linux.it>
11 * Cursor enable/disable by Rodolfo Giometti <giometti@linux.it>
12 *
13 * Copyright 2002 MontaVista Software
14 * Author: MontaVista Software, Inc.
15 * ppopov@mvista.com or source@mvista.com
16 *
17 * Copyright 2002 Alchemy Semiconductor
18 * Author: Alchemy Semiconductor
19 *
20 * Based on:
21 * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
22 * Created 28 Dec 1997 by Geert Uytterhoeven
23 *
24 * This program is free software; you can redistribute it and/or modify it
25 * under the terms of the GNU General Public License as published by the
26 * Free Software Foundation; either version 2 of the License, or (at your
27 * option) any later version.
28 *
29 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
30 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
31 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
32 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
33 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
34 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
35 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
36 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
38 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * You should have received a copy of the GNU General Public License along
41 * with this program; if not, write to the Free Software Foundation, Inc.,
42 * 675 Mass Ave, Cambridge, MA 02139, USA.
43 */
44 #include <linux/module.h>
45 #include <linux/kernel.h>
46 #include <linux/errno.h>
47 #include <linux/string.h>
48 #include <linux/mm.h>
49 #include <linux/fb.h>
50 #include <linux/init.h>
51 #include <linux/interrupt.h>
52 #include <linux/ctype.h>
53 #include <linux/dma-mapping.h>
54 #include <linux/platform_device.h>
55 #include <linux/slab.h>
56
57 #include <asm/mach-au1x00/au1000.h>
58
59 #define DEBUG 0
60
61 #include "au1100fb.h"
62
63 /*
64 * Sanity check. If this is a new Au1100 based board, search for
65 * the PB1100 ifdefs to make sure you modify the code accordingly.
66 */
67 #if defined(CONFIG_MIPS_PB1100)
68 #include <asm/mach-pb1x00/pb1100.h>
69 #elif defined(CONFIG_MIPS_DB1100)
70 #include <asm/mach-db1x00/db1x00.h>
71 #else
72 #error "Unknown Au1100 board, Au1100 FB driver not supported"
73 #endif
74
75 #define DRIVER_NAME "au1100fb"
76 #define DRIVER_DESC "LCD controller driver for AU1100 processors"
77
78 #define to_au1100fb_device(_info) \
79 (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
80
81 /* Bitfields format supported by the controller. Note that the order of formats
82 * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
83 * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
84 */
85 struct fb_bitfield rgb_bitfields[][4] =
86 {
87 /* Red, Green, Blue, Transp */
88 { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
89 { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
90 { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
91 { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
92 { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
93
94 /* The last is used to describe 12bpp format */
95 { { 8, 4, 0 }, { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
96 };
97
98 static struct fb_fix_screeninfo au1100fb_fix __devinitdata = {
99 .id = "AU1100 FB",
100 .xpanstep = 1,
101 .ypanstep = 1,
102 .type = FB_TYPE_PACKED_PIXELS,
103 .accel = FB_ACCEL_NONE,
104 };
105
106 static struct fb_var_screeninfo au1100fb_var __devinitdata = {
107 .activate = FB_ACTIVATE_NOW,
108 .height = -1,
109 .width = -1,
110 .vmode = FB_VMODE_NONINTERLACED,
111 };
112
113 /* fb_blank
114 * Blank the screen. Depending on the mode, the screen will be
115 * activated with the backlight color, or desactivated
116 */
117 static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
118 {
119 struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
120
121 print_dbg("fb_blank %d %p", blank_mode, fbi);
122
123 switch (blank_mode) {
124
125 case VESA_NO_BLANKING:
126 /* Turn on panel */
127 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
128 #ifdef CONFIG_MIPS_PB1100
129 if (fbdev->panel_idx == 1) {
130 au_writew(au_readw(PB1100_G_CONTROL)
131 | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
132 PB1100_G_CONTROL);
133 }
134 #endif
135 au_sync();
136 break;
137
138 case VESA_VSYNC_SUSPEND:
139 case VESA_HSYNC_SUSPEND:
140 case VESA_POWERDOWN:
141 /* Turn off panel */
142 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
143 #ifdef CONFIG_MIPS_PB1100
144 if (fbdev->panel_idx == 1) {
145 au_writew(au_readw(PB1100_G_CONTROL)
146 & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
147 PB1100_G_CONTROL);
148 }
149 #endif
150 au_sync();
151 break;
152 default:
153 break;
154
155 }
156 return 0;
157 }
158
159 /*
160 * Set hardware with var settings. This will enable the controller with a specific
161 * mode, normally validated with the fb_check_var method
162 */
163 int au1100fb_setmode(struct au1100fb_device *fbdev)
164 {
165 struct fb_info *info = &fbdev->info;
166 u32 words;
167 int index;
168
169 if (!fbdev)
170 return -EINVAL;
171
172 /* Update var-dependent FB info */
173 if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
174 if (info->var.bits_per_pixel <= 8) {
175 /* palettized */
176 info->var.red.offset = 0;
177 info->var.red.length = info->var.bits_per_pixel;
178 info->var.red.msb_right = 0;
179
180 info->var.green.offset = 0;
181 info->var.green.length = info->var.bits_per_pixel;
182 info->var.green.msb_right = 0;
183
184 info->var.blue.offset = 0;
185 info->var.blue.length = info->var.bits_per_pixel;
186 info->var.blue.msb_right = 0;
187
188 info->var.transp.offset = 0;
189 info->var.transp.length = 0;
190 info->var.transp.msb_right = 0;
191
192 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
193 info->fix.line_length = info->var.xres_virtual /
194 (8/info->var.bits_per_pixel);
195 } else {
196 /* non-palettized */
197 index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
198 info->var.red = rgb_bitfields[index][0];
199 info->var.green = rgb_bitfields[index][1];
200 info->var.blue = rgb_bitfields[index][2];
201 info->var.transp = rgb_bitfields[index][3];
202
203 info->fix.visual = FB_VISUAL_TRUECOLOR;
204 info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
205 }
206 } else {
207 /* mono */
208 info->fix.visual = FB_VISUAL_MONO10;
209 info->fix.line_length = info->var.xres_virtual / 8;
210 }
211
212 info->screen_size = info->fix.line_length * info->var.yres_virtual;
213 info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
214 >> LCD_CONTROL_SM_BIT) * 90;
215
216 /* Determine BPP mode and format */
217 fbdev->regs->lcd_control = fbdev->panel->control_base;
218 fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
219 fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
220 fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
221 fbdev->regs->lcd_intenable = 0;
222 fbdev->regs->lcd_intstatus = 0;
223 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
224
225 if (panel_is_dual(fbdev->panel)) {
226 /* Second panel display seconf half of screen if possible,
227 * otherwise display the same as the first panel */
228 if (info->var.yres_virtual >= (info->var.yres << 1)) {
229 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
230 (info->fix.line_length *
231 (info->var.yres_virtual >> 1)));
232 } else {
233 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
234 }
235 }
236
237 words = info->fix.line_length / sizeof(u32);
238 if (!info->var.rotate || (info->var.rotate == 180)) {
239 words *= info->var.yres_virtual;
240 if (info->var.rotate /* 180 */) {
241 words -= (words % 8); /* should be divisable by 8 */
242 }
243 }
244 fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
245
246 fbdev->regs->lcd_pwmdiv = 0;
247 fbdev->regs->lcd_pwmhi = 0;
248
249 /* Resume controller */
250 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
251 mdelay(10);
252 au1100fb_fb_blank(VESA_NO_BLANKING, info);
253
254 return 0;
255 }
256
257 /* fb_setcolreg
258 * Set color in LCD palette.
259 */
260 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
261 {
262 struct au1100fb_device *fbdev;
263 u32 *palette;
264 u32 value;
265
266 fbdev = to_au1100fb_device(fbi);
267 palette = fbdev->regs->lcd_pallettebase;
268
269 if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
270 return -EINVAL;
271
272 if (fbi->var.grayscale) {
273 /* Convert color to grayscale */
274 red = green = blue =
275 (19595 * red + 38470 * green + 7471 * blue) >> 16;
276 }
277
278 if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
279 /* Place color in the pseudopalette */
280 if (regno > 16)
281 return -EINVAL;
282
283 palette = (u32*)fbi->pseudo_palette;
284
285 red >>= (16 - fbi->var.red.length);
286 green >>= (16 - fbi->var.green.length);
287 blue >>= (16 - fbi->var.blue.length);
288
289 value = (red << fbi->var.red.offset) |
290 (green << fbi->var.green.offset)|
291 (blue << fbi->var.blue.offset);
292 value &= 0xFFFF;
293
294 } else if (panel_is_active(fbdev->panel)) {
295 /* COLOR TFT PALLETTIZED (use RGB 565) */
296 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
297 value &= 0xFFFF;
298
299 } else if (panel_is_color(fbdev->panel)) {
300 /* COLOR STN MODE */
301 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
302 ((green >> 8) & 0x00F0) |
303 (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
304 value &= 0xFFF;
305 } else {
306 /* MONOCHROME MODE */
307 value = (green >> 12) & 0x000F;
308 value &= 0xF;
309 }
310
311 palette[regno] = value;
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 static int au1100fb_setup(struct au1100fb_device *fbdev)
442 {
443 char *this_opt, *options;
444 int num_panels = ARRAY_SIZE(known_lcd_panels);
445
446 if (num_panels <= 0) {
447 print_err("No LCD panels supported by driver!");
448 return -ENODEV;
449 }
450
451 if (fb_get_options(DRIVER_NAME, &options))
452 return -ENODEV;
453 if (!options)
454 return -ENODEV;
455
456 while ((this_opt = strsep(&options, ",")) != NULL) {
457 /* Panel option */
458 if (!strncmp(this_opt, "panel:", 6)) {
459 int i;
460 this_opt += 6;
461 for (i = 0; i < num_panels; i++) {
462 if (!strncmp(this_opt, known_lcd_panels[i].name,
463 strlen(this_opt))) {
464 fbdev->panel = &known_lcd_panels[i];
465 fbdev->panel_idx = i;
466 break;
467 }
468 }
469 if (i >= num_panels) {
470 print_warn("Panel '%s' not supported!", this_opt);
471 return -ENODEV;
472 }
473 }
474 /* Unsupported option */
475 else
476 print_warn("Unsupported option \"%s\"", this_opt);
477 }
478
479 print_info("Panel=%s", fbdev->panel->name);
480
481 return 0;
482 }
483
484 static int __devinit au1100fb_drv_probe(struct platform_device *dev)
485 {
486 struct au1100fb_device *fbdev = NULL;
487 struct resource *regs_res;
488 unsigned long page;
489 u32 sys_clksrc;
490
491 /* Allocate new device private */
492 fbdev = kzalloc(sizeof(struct au1100fb_device), GFP_KERNEL);
493 if (!fbdev) {
494 print_err("fail to allocate device private record");
495 return -ENOMEM;
496 }
497
498 if (au1100fb_setup(fbdev))
499 goto failed;
500
501 platform_set_drvdata(dev, (void *)fbdev);
502
503 /* Allocate region for our registers and map them */
504 regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
505 if (!regs_res) {
506 print_err("fail to retrieve registers resource");
507 return -EFAULT;
508 }
509
510 au1100fb_fix.mmio_start = regs_res->start;
511 au1100fb_fix.mmio_len = resource_size(regs_res);
512
513 if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
514 DRIVER_NAME)) {
515 print_err("fail to lock memory region at 0x%08lx",
516 au1100fb_fix.mmio_start);
517 return -EBUSY;
518 }
519
520 fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
521
522 print_dbg("Register memory map at %p", fbdev->regs);
523 print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
524
525 /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
526 fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
527 (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
528
529 fbdev->fb_mem = dma_alloc_coherent(&dev->dev, PAGE_ALIGN(fbdev->fb_len),
530 &fbdev->fb_phys, GFP_KERNEL);
531 if (!fbdev->fb_mem) {
532 print_err("fail to allocate frambuffer (size: %dK))",
533 fbdev->fb_len / 1024);
534 return -ENOMEM;
535 }
536
537 au1100fb_fix.smem_start = fbdev->fb_phys;
538 au1100fb_fix.smem_len = fbdev->fb_len;
539
540 /*
541 * Set page reserved so that mmap will work. This is necessary
542 * since we'll be remapping normal memory.
543 */
544 for (page = (unsigned long)fbdev->fb_mem;
545 page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
546 page += PAGE_SIZE) {
547 #if CONFIG_DMA_NONCOHERENT
548 SetPageReserved(virt_to_page(CAC_ADDR((void *)page)));
549 #else
550 SetPageReserved(virt_to_page(page));
551 #endif
552 }
553
554 print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
555 print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
556
557 /* Setup LCD clock to AUX (48 MHz) */
558 sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
559 au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
560
561 /* load the panel info into the var struct */
562 au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
563 au1100fb_var.xres = fbdev->panel->xres;
564 au1100fb_var.xres_virtual = au1100fb_var.xres;
565 au1100fb_var.yres = fbdev->panel->yres;
566 au1100fb_var.yres_virtual = au1100fb_var.yres;
567
568 fbdev->info.screen_base = fbdev->fb_mem;
569 fbdev->info.fbops = &au1100fb_ops;
570 fbdev->info.fix = au1100fb_fix;
571
572 if (!(fbdev->info.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL))) {
573 return -ENOMEM;
574 }
575
576 if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
577 print_err("Fail to allocate colormap (%d entries)",
578 AU1100_LCD_NBR_PALETTE_ENTRIES);
579 kfree(fbdev->info.pseudo_palette);
580 return -EFAULT;
581 }
582
583 fbdev->info.var = au1100fb_var;
584
585 /* Set h/w registers */
586 au1100fb_setmode(fbdev);
587
588 /* Register new framebuffer */
589 if (register_framebuffer(&fbdev->info) < 0) {
590 print_err("cannot register new framebuffer");
591 goto failed;
592 }
593
594 return 0;
595
596 failed:
597 if (fbdev->regs) {
598 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
599 }
600 if (fbdev->fb_mem) {
601 dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem,
602 fbdev->fb_phys);
603 }
604 if (fbdev->info.cmap.len != 0) {
605 fb_dealloc_cmap(&fbdev->info.cmap);
606 }
607 kfree(fbdev);
608 platform_set_drvdata(dev, NULL);
609
610 return 0;
611 }
612
613 int au1100fb_drv_remove(struct platform_device *dev)
614 {
615 struct au1100fb_device *fbdev = NULL;
616
617 if (!dev)
618 return -ENODEV;
619
620 fbdev = (struct au1100fb_device *) platform_get_drvdata(dev);
621
622 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
623 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
624 #endif
625 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
626
627 /* Clean up all probe data */
628 unregister_framebuffer(&fbdev->info);
629
630 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
631
632 dma_free_coherent(&dev->dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem,
633 fbdev->fb_phys);
634
635 fb_dealloc_cmap(&fbdev->info.cmap);
636 kfree(fbdev->info.pseudo_palette);
637 kfree((void*)fbdev);
638
639 return 0;
640 }
641
642 #ifdef CONFIG_PM
643 static u32 sys_clksrc;
644 static struct au1100fb_regs fbregs;
645
646 int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
647 {
648 struct au1100fb_device *fbdev = platform_get_drvdata(dev);
649
650 if (!fbdev)
651 return 0;
652
653 /* Save the clock source state */
654 sys_clksrc = au_readl(SYS_CLKSRC);
655
656 /* Blank the LCD */
657 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
658
659 /* Stop LCD clocking */
660 au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
661
662 memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
663
664 return 0;
665 }
666
667 int au1100fb_drv_resume(struct platform_device *dev)
668 {
669 struct au1100fb_device *fbdev = platform_get_drvdata(dev);
670
671 if (!fbdev)
672 return 0;
673
674 memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
675
676 /* Restart LCD clocking */
677 au_writel(sys_clksrc, SYS_CLKSRC);
678
679 /* Unblank the LCD */
680 au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
681
682 return 0;
683 }
684 #else
685 #define au1100fb_drv_suspend NULL
686 #define au1100fb_drv_resume NULL
687 #endif
688
689 static struct platform_driver au1100fb_driver = {
690 .driver = {
691 .name = "au1100-lcd",
692 .owner = THIS_MODULE,
693 },
694 .probe = au1100fb_drv_probe,
695 .remove = au1100fb_drv_remove,
696 .suspend = au1100fb_drv_suspend,
697 .resume = au1100fb_drv_resume,
698 };
699
700 static int __init au1100fb_load(void)
701 {
702 return platform_driver_register(&au1100fb_driver);
703 }
704
705 static void __exit au1100fb_unload(void)
706 {
707 platform_driver_unregister(&au1100fb_driver);
708 }
709
710 module_init(au1100fb_load);
711 module_exit(au1100fb_unload);
712
713 MODULE_DESCRIPTION(DRIVER_DESC);
714 MODULE_LICENSE("GPL");
Linus' kernel tree