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Staging: samsung-laptop: fix up some sysfs attribute permissions
[wandboard.git] / drivers / video / au1100fb.c
bloba699aab638205c01b0765610cd9846a5468a8944
1 /*
2 * BRIEF MODULE DESCRIPTION
3 * Au1100 LCD Driver.
4 *
5 * Rewritten for 2.6 by Embedded Alley Solutions
6 * <source@embeddedalley.com>, based on submissions by
7 * Karl Lessard <klessard@sunrisetelecom.com>
8 * <c.pellegrin@exadron.com>
9 *
10 * PM support added by Rodolfo Giometti <giometti@linux.it>
11 * Cursor enable/disable by Rodolfo Giometti <giometti@linux.it>
12 *
13 * Copyright 2002 MontaVista Software
14 * Author: MontaVista Software, Inc.
15 * ppopov@mvista.com or source@mvista.com
16 *
17 * Copyright 2002 Alchemy Semiconductor
18 * Author: Alchemy Semiconductor
19 *
20 * Based on:
21 * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
22 * Created 28 Dec 1997 by Geert Uytterhoeven
23 *
24 * This program is free software; you can redistribute it and/or modify it
25 * under the terms of the GNU General Public License as published by the
26 * Free Software Foundation; either version 2 of the License, or (at your
27 * option) any later version.
28 *
29 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
30 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
31 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
32 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
33 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
34 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
35 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
36 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
38 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * You should have received a copy of the GNU General Public License along
41 * with this program; if not, write to the Free Software Foundation, Inc.,
42 * 675 Mass Ave, Cambridge, MA 02139, USA.
43 */
44 #include <linux/module.h>
45 #include <linux/kernel.h>
46 #include <linux/errno.h>
47 #include <linux/string.h>
48 #include <linux/mm.h>
49 #include <linux/fb.h>
50 #include <linux/init.h>
51 #include <linux/interrupt.h>
52 #include <linux/ctype.h>
53 #include <linux/dma-mapping.h>
54 #include <linux/platform_device.h>
55
56 #include <asm/mach-au1x00/au1000.h>
57
58 #define DEBUG 0
59
60 #include "au1100fb.h"
61
62 /*
63 * Sanity check. If this is a new Au1100 based board, search for
64 * the PB1100 ifdefs to make sure you modify the code accordingly.
65 */
66 #if defined(CONFIG_MIPS_PB1100)
67 #include <asm/mach-pb1x00/pb1100.h>
68 #elif defined(CONFIG_MIPS_DB1100)
69 #include <asm/mach-db1x00/db1x00.h>
70 #else
71 #error "Unknown Au1100 board, Au1100 FB driver not supported"
72 #endif
73
74 #define DRIVER_NAME "au1100fb"
75 #define DRIVER_DESC "LCD controller driver for AU1100 processors"
76
77 #define to_au1100fb_device(_info) \
78 (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
79
80 /* Bitfields format supported by the controller. Note that the order of formats
81 * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
82 * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
83 */
84 struct fb_bitfield rgb_bitfields[][4] =
85 {
86 /* Red, Green, Blue, Transp */
87 { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
88 { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
89 { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
90 { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
91 { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
92
93 /* The last is used to describe 12bpp format */
94 { { 8, 4, 0 }, { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
95 };
96
97 static struct fb_fix_screeninfo au1100fb_fix __initdata = {
98 .id = "AU1100 FB",
99 .xpanstep = 1,
100 .ypanstep = 1,
101 .type = FB_TYPE_PACKED_PIXELS,
102 .accel = FB_ACCEL_NONE,
103 };
104
105 static struct fb_var_screeninfo au1100fb_var __initdata = {
106 .activate = FB_ACTIVATE_NOW,
107 .height = -1,
108 .width = -1,
109 .vmode = FB_VMODE_NONINTERLACED,
110 };
111
112 static struct au1100fb_drv_info drv_info;
113
114 static int nocursor = 0;
115 module_param(nocursor, int, 0644);
116 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
117
118 /* fb_blank
119 * Blank the screen. Depending on the mode, the screen will be
120 * activated with the backlight color, or desactivated
121 */
122 static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
123 {
124 struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
125
126 print_dbg("fb_blank %d %p", blank_mode, fbi);
127
128 switch (blank_mode) {
129
130 case VESA_NO_BLANKING:
131 /* Turn on panel */
132 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
133 #ifdef CONFIG_MIPS_PB1100
134 if (drv_info.panel_idx == 1) {
135 au_writew(au_readw(PB1100_G_CONTROL)
136 | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
137 PB1100_G_CONTROL);
138 }
139 #endif
140 au_sync();
141 break;
142
143 case VESA_VSYNC_SUSPEND:
144 case VESA_HSYNC_SUSPEND:
145 case VESA_POWERDOWN:
146 /* Turn off panel */
147 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
148 #ifdef CONFIG_MIPS_PB1100
149 if (drv_info.panel_idx == 1) {
150 au_writew(au_readw(PB1100_G_CONTROL)
151 & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
152 PB1100_G_CONTROL);
153 }
154 #endif
155 au_sync();
156 break;
157 default:
158 break;
159
160 }
161 return 0;
162 }
163
164 /*
165 * Set hardware with var settings. This will enable the controller with a specific
166 * mode, normally validated with the fb_check_var method
167 */
168 int au1100fb_setmode(struct au1100fb_device *fbdev)
169 {
170 struct fb_info *info = &fbdev->info;
171 u32 words;
172 int index;
173
174 if (!fbdev)
175 return -EINVAL;
176
177 /* Update var-dependent FB info */
178 if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
179 if (info->var.bits_per_pixel <= 8) {
180 /* palettized */
181 info->var.red.offset = 0;
182 info->var.red.length = info->var.bits_per_pixel;
183 info->var.red.msb_right = 0;
184
185 info->var.green.offset = 0;
186 info->var.green.length = info->var.bits_per_pixel;
187 info->var.green.msb_right = 0;
188
189 info->var.blue.offset = 0;
190 info->var.blue.length = info->var.bits_per_pixel;
191 info->var.blue.msb_right = 0;
192
193 info->var.transp.offset = 0;
194 info->var.transp.length = 0;
195 info->var.transp.msb_right = 0;
196
197 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
198 info->fix.line_length = info->var.xres_virtual /
199 (8/info->var.bits_per_pixel);
200 } else {
201 /* non-palettized */
202 index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
203 info->var.red = rgb_bitfields[index][0];
204 info->var.green = rgb_bitfields[index][1];
205 info->var.blue = rgb_bitfields[index][2];
206 info->var.transp = rgb_bitfields[index][3];
207
208 info->fix.visual = FB_VISUAL_TRUECOLOR;
209 info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
210 }
211 } else {
212 /* mono */
213 info->fix.visual = FB_VISUAL_MONO10;
214 info->fix.line_length = info->var.xres_virtual / 8;
215 }
216
217 info->screen_size = info->fix.line_length * info->var.yres_virtual;
218 info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
219 >> LCD_CONTROL_SM_BIT) * 90;
220
221 /* Determine BPP mode and format */
222 fbdev->regs->lcd_control = fbdev->panel->control_base;
223 fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
224 fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
225 fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
226 fbdev->regs->lcd_intenable = 0;
227 fbdev->regs->lcd_intstatus = 0;
228 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
229
230 if (panel_is_dual(fbdev->panel)) {
231 /* Second panel display seconf half of screen if possible,
232 * otherwise display the same as the first panel */
233 if (info->var.yres_virtual >= (info->var.yres << 1)) {
234 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
235 (info->fix.line_length *
236 (info->var.yres_virtual >> 1)));
237 } else {
238 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
239 }
240 }
241
242 words = info->fix.line_length / sizeof(u32);
243 if (!info->var.rotate || (info->var.rotate == 180)) {
244 words *= info->var.yres_virtual;
245 if (info->var.rotate /* 180 */) {
246 words -= (words % 8); /* should be divisable by 8 */
247 }
248 }
249 fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
250
251 fbdev->regs->lcd_pwmdiv = 0;
252 fbdev->regs->lcd_pwmhi = 0;
253
254 /* Resume controller */
255 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
256 mdelay(10);
257 au1100fb_fb_blank(VESA_NO_BLANKING, info);
258
259 return 0;
260 }
261
262 /* fb_setcolreg
263 * Set color in LCD palette.
264 */
265 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
266 {
267 struct au1100fb_device *fbdev;
268 u32 *palette;
269 u32 value;
270
271 fbdev = to_au1100fb_device(fbi);
272 palette = fbdev->regs->lcd_pallettebase;
273
274 if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
275 return -EINVAL;
276
277 if (fbi->var.grayscale) {
278 /* Convert color to grayscale */
279 red = green = blue =
280 (19595 * red + 38470 * green + 7471 * blue) >> 16;
281 }
282
283 if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
284 /* Place color in the pseudopalette */
285 if (regno > 16)
286 return -EINVAL;
287
288 palette = (u32*)fbi->pseudo_palette;
289
290 red >>= (16 - fbi->var.red.length);
291 green >>= (16 - fbi->var.green.length);
292 blue >>= (16 - fbi->var.blue.length);
293
294 value = (red << fbi->var.red.offset) |
295 (green << fbi->var.green.offset)|
296 (blue << fbi->var.blue.offset);
297 value &= 0xFFFF;
298
299 } else if (panel_is_active(fbdev->panel)) {
300 /* COLOR TFT PALLETTIZED (use RGB 565) */
301 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
302 value &= 0xFFFF;
303
304 } else if (panel_is_color(fbdev->panel)) {
305 /* COLOR STN MODE */
306 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
307 ((green >> 8) & 0x00F0) |
308 (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
309 value &= 0xFFF;
310 } else {
311 /* MONOCHROME MODE */
312 value = (green >> 12) & 0x000F;
313 value &= 0xF;
314 }
315
316 palette[regno] = value;
317
318 return 0;
319 }
320
321 /* fb_pan_display
322 * Pan display in x and/or y as specified
323 */
324 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
325 {
326 struct au1100fb_device *fbdev;
327 int dy;
328
329 fbdev = to_au1100fb_device(fbi);
330
331 print_dbg("fb_pan_display %p %p", var, fbi);
332
333 if (!var || !fbdev) {
334 return -EINVAL;
335 }
336
337 if (var->xoffset - fbi->var.xoffset) {
338 /* No support for X panning for now! */
339 return -EINVAL;
340 }
341
342 print_dbg("fb_pan_display 2 %p %p", var, fbi);
343 dy = var->yoffset - fbi->var.yoffset;
344 if (dy) {
345
346 u32 dmaaddr;
347
348 print_dbg("Panning screen of %d lines", dy);
349
350 dmaaddr = fbdev->regs->lcd_dmaaddr0;
351 dmaaddr += (fbi->fix.line_length * dy);
352
353 /* TODO: Wait for current frame to finished */
354 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
355
356 if (panel_is_dual(fbdev->panel)) {
357 dmaaddr = fbdev->regs->lcd_dmaaddr1;
358 dmaaddr += (fbi->fix.line_length * dy);
359 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
360 }
361 }
362 print_dbg("fb_pan_display 3 %p %p", var, fbi);
363
364 return 0;
365 }
366
367 /* fb_rotate
368 * Rotate the display of this angle. This doesn't seems to be used by the core,
369 * but as our hardware supports it, so why not implementing it...
370 */
371 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
372 {
373 struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
374
375 print_dbg("fb_rotate %p %d", fbi, angle);
376
377 if (fbdev && (angle > 0) && !(angle % 90)) {
378
379 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
380
381 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
382 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
383
384 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
385 }
386 }
387
388 /* fb_mmap
389 * Map video memory in user space. We don't use the generic fb_mmap method mainly
390 * to allow the use of the TLB streaming flag (CCA=6)
391 */
392 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
393 {
394 struct au1100fb_device *fbdev;
395 unsigned int len;
396 unsigned long start=0, off;
397
398 fbdev = to_au1100fb_device(fbi);
399
400 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
401 return -EINVAL;
402 }
403
404 start = fbdev->fb_phys & PAGE_MASK;
405 len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
406
407 off = vma->vm_pgoff << PAGE_SHIFT;
408
409 if ((vma->vm_end - vma->vm_start + off) > len) {
410 return -EINVAL;
411 }
412
413 off += start;
414 vma->vm_pgoff = off >> PAGE_SHIFT;
415
416 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
417 pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
418
419 vma->vm_flags |= VM_IO;
420
421 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
422 vma->vm_end - vma->vm_start,
423 vma->vm_page_prot)) {
424 return -EAGAIN;
425 }
426
427 return 0;
428 }
429
430 /* fb_cursor
431 * Used to disable cursor drawing...
432 */
433 int au1100fb_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
434 {
435 if (nocursor)
436 return 0;
437 else
438 return -EINVAL; /* just to force soft_cursor() call */
439 }
440
441 static struct fb_ops au1100fb_ops =
442 {
443 .owner = THIS_MODULE,
444 .fb_setcolreg = au1100fb_fb_setcolreg,
445 .fb_blank = au1100fb_fb_blank,
446 .fb_pan_display = au1100fb_fb_pan_display,
447 .fb_fillrect = cfb_fillrect,
448 .fb_copyarea = cfb_copyarea,
449 .fb_imageblit = cfb_imageblit,
450 .fb_rotate = au1100fb_fb_rotate,
451 .fb_mmap = au1100fb_fb_mmap,
452 .fb_cursor = au1100fb_fb_cursor,
453 };
454
455
456 /*-------------------------------------------------------------------------*/
457
458 /* AU1100 LCD controller device driver */
459
460 static int __init au1100fb_drv_probe(struct platform_device *dev)
461 {
462 struct au1100fb_device *fbdev = NULL;
463 struct resource *regs_res;
464 unsigned long page;
465 u32 sys_clksrc;
466
467 if (!dev)
468 return -EINVAL;
469
470 /* Allocate new device private */
471 if (!(fbdev = kzalloc(sizeof(struct au1100fb_device), GFP_KERNEL))) {
472 print_err("fail to allocate device private record");
473 return -ENOMEM;
474 }
475
476 fbdev->panel = &known_lcd_panels[drv_info.panel_idx];
477
478 platform_set_drvdata(dev, (void *)fbdev);
479
480 /* Allocate region for our registers and map them */
481 if (!(regs_res = platform_get_resource(to_platform_device(dev),
482 IORESOURCE_MEM, 0))) {
483 print_err("fail to retrieve registers resource");
484 return -EFAULT;
485 }
486
487 au1100fb_fix.mmio_start = regs_res->start;
488 au1100fb_fix.mmio_len = regs_res->end - regs_res->start + 1;
489
490 if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
491 DRIVER_NAME)) {
492 print_err("fail to lock memory region at 0x%08lx",
493 au1100fb_fix.mmio_start);
494 return -EBUSY;
495 }
496
497 fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
498
499 print_dbg("Register memory map at %p", fbdev->regs);
500 print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
501
502
503
504 /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
505 fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
506 (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
507
508 fbdev->fb_mem = dma_alloc_coherent(dev, PAGE_ALIGN(fbdev->fb_len),
509 &fbdev->fb_phys, GFP_KERNEL);
510 if (!fbdev->fb_mem) {
511 print_err("fail to allocate frambuffer (size: %dK))",
512 fbdev->fb_len / 1024);
513 return -ENOMEM;
514 }
515
516 au1100fb_fix.smem_start = fbdev->fb_phys;
517 au1100fb_fix.smem_len = fbdev->fb_len;
518
519 /*
520 * Set page reserved so that mmap will work. This is necessary
521 * since we'll be remapping normal memory.
522 */
523 for (page = (unsigned long)fbdev->fb_mem;
524 page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
525 page += PAGE_SIZE) {
526 #if CONFIG_DMA_NONCOHERENT
527 SetPageReserved(virt_to_page(CAC_ADDR(page)));
528 #else
529 SetPageReserved(virt_to_page(page));
530 #endif
531 }
532
533 print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
534 print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
535
536 /* Setup LCD clock to AUX (48 MHz) */
537 sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
538 au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
539
540 /* load the panel info into the var struct */
541 au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
542 au1100fb_var.xres = fbdev->panel->xres;
543 au1100fb_var.xres_virtual = au1100fb_var.xres;
544 au1100fb_var.yres = fbdev->panel->yres;
545 au1100fb_var.yres_virtual = au1100fb_var.yres;
546
547 fbdev->info.screen_base = fbdev->fb_mem;
548 fbdev->info.fbops = &au1100fb_ops;
549 fbdev->info.fix = au1100fb_fix;
550
551 if (!(fbdev->info.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL))) {
552 return -ENOMEM;
553 }
554
555 if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
556 print_err("Fail to allocate colormap (%d entries)",
557 AU1100_LCD_NBR_PALETTE_ENTRIES);
558 kfree(fbdev->info.pseudo_palette);
559 return -EFAULT;
560 }
561
562 fbdev->info.var = au1100fb_var;
563
564 /* Set h/w registers */
565 au1100fb_setmode(fbdev);
566
567 /* Register new framebuffer */
568 if (register_framebuffer(&fbdev->info) < 0) {
569 print_err("cannot register new framebuffer");
570 goto failed;
571 }
572
573 return 0;
574
575 failed:
576 if (fbdev->regs) {
577 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
578 }
579 if (fbdev->fb_mem) {
580 dma_free_noncoherent(dev, fbdev->fb_len, fbdev->fb_mem, fbdev->fb_phys);
581 }
582 if (fbdev->info.cmap.len != 0) {
583 fb_dealloc_cmap(&fbdev->info.cmap);
584 }
585 kfree(fbdev);
586 platform_set_drvdata(dev, NULL);
587
588 return 0;
589 }
590
591 int au1100fb_drv_remove(struct platform_device *dev)
592 {
593 struct au1100fb_device *fbdev = NULL;
594
595 if (!dev)
596 return -ENODEV;
597
598 fbdev = (struct au1100fb_device *) platform_get_drvdata(dev);
599
600 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
601 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
602 #endif
603 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
604
605 /* Clean up all probe data */
606 unregister_framebuffer(&fbdev->info);
607
608 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
609
610 dma_free_coherent(dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem, fbdev->fb_phys);
611
612 fb_dealloc_cmap(&fbdev->info.cmap);
613 kfree(fbdev->info.pseudo_palette);
614 kfree((void*)fbdev);
615
616 return 0;
617 }
618
619 #ifdef CONFIG_PM
620 static u32 sys_clksrc;
621 static struct au1100fb_regs fbregs;
622
623 int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
624 {
625 struct au1100fb_device *fbdev = platform_get_drvdata(dev);
626
627 if (!fbdev)
628 return 0;
629
630 /* Save the clock source state */
631 sys_clksrc = au_readl(SYS_CLKSRC);
632
633 /* Blank the LCD */
634 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
635
636 /* Stop LCD clocking */
637 au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
638
639 memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
640
641 return 0;
642 }
643
644 int au1100fb_drv_resume(struct platform_device *dev)
645 {
646 struct au1100fb_device *fbdev = platform_get_drvdata(dev);
647
648 if (!fbdev)
649 return 0;
650
651 memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
652
653 /* Restart LCD clocking */
654 au_writel(sys_clksrc, SYS_CLKSRC);
655
656 /* Unblank the LCD */
657 au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
658
659 return 0;
660 }
661 #else
662 #define au1100fb_drv_suspend NULL
663 #define au1100fb_drv_resume NULL
664 #endif
665
666 static struct platform_driver au1100fb_driver = {
667 .driver = {
668 .name = "au1100-lcd",
669 .owner = THIS_MODULE,
670 },
671 .probe = au1100fb_drv_probe,
672 .remove = au1100fb_drv_remove,
673 .suspend = au1100fb_drv_suspend,
674 .resume = au1100fb_drv_resume,
675 };
676
677 /*-------------------------------------------------------------------------*/
678
679 /* Kernel driver */
680
681 int au1100fb_setup(char *options)
682 {
683 char* this_opt;
684 int num_panels = ARRAY_SIZE(known_lcd_panels);
685 char* mode = NULL;
686 int panel_idx = 0;
687
688 if (num_panels <= 0) {
689 print_err("No LCD panels supported by driver!");
690 return -EFAULT;
691 }
692
693 if (options) {
694 while ((this_opt = strsep(&options,",")) != NULL) {
695 /* Panel option */
696 if (!strncmp(this_opt, "panel:", 6)) {
697 int i;
698 this_opt += 6;
699 for (i = 0; i < num_panels; i++) {
700 if (!strncmp(this_opt,
701 known_lcd_panels[i].name,
702 strlen(this_opt))) {
703 panel_idx = i;
704 break;
705 }
706 }
707 if (i >= num_panels) {
708 print_warn("Panel %s not supported!", this_opt);
709 }
710 }
711 if (!strncmp(this_opt, "nocursor", 8)) {
712 this_opt += 8;
713 nocursor = 1;
714 print_info("Cursor disabled");
715 }
716 /* Mode option (only option that start with digit) */
717 else if (isdigit(this_opt[0])) {
718 mode = kstrdup(this_opt, GFP_KERNEL);
719 if (!mode) {
720 print_err("memory allocation failed");
721 return -ENOMEM;
722 }
723 }
724 /* Unsupported option */
725 else {
726 print_warn("Unsupported option \"%s\"", this_opt);
727 }
728 }
729 }
730
731 drv_info.panel_idx = panel_idx;
732 drv_info.opt_mode = mode;
733
734 print_info("Panel=%s Mode=%s",
735 known_lcd_panels[drv_info.panel_idx].name,
736 drv_info.opt_mode ? drv_info.opt_mode : "default");
737
738 return 0;
739 }
740
741 int __init au1100fb_init(void)
742 {
743 char* options;
744 int ret;
745
746 print_info("" DRIVER_DESC "");
747
748 memset(&drv_info, 0, sizeof(drv_info));
749
750 if (fb_get_options(DRIVER_NAME, &options))
751 return -ENODEV;
752
753 /* Setup driver with options */
754 ret = au1100fb_setup(options);
755 if (ret < 0) {
756 print_err("Fail to setup driver");
757 return ret;
758 }
759
760 return platform_driver_register(&au1100fb_driver);
761 }
762
763 void __exit au1100fb_cleanup(void)
764 {
765 platform_driver_unregister(&au1100fb_driver);
766
767 kfree(drv_info.opt_mode);
768 }
769
770 module_init(au1100fb_init);
771 module_exit(au1100fb_cleanup);
772
773 MODULE_DESCRIPTION(DRIVER_DESC);
774 MODULE_LICENSE("GPL");
WandBoard kernel