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slub: fix a possible memleak in __slab_alloc()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / au1100fb.c
blob01a8fde67f20ab906b55ef2739159c430f905e55
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 static struct au1100fb_drv_info drv_info;
114
115 static int nocursor = 0;
116 module_param(nocursor, int, 0644);
117 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
118
119 /* fb_blank
120 * Blank the screen. Depending on the mode, the screen will be
121 * activated with the backlight color, or desactivated
122 */
123 static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
124 {
125 struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
126
127 print_dbg("fb_blank %d %p", blank_mode, fbi);
128
129 switch (blank_mode) {
130
131 case VESA_NO_BLANKING:
132 /* Turn on panel */
133 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
134 #ifdef CONFIG_MIPS_PB1100
135 if (drv_info.panel_idx == 1) {
136 au_writew(au_readw(PB1100_G_CONTROL)
137 | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
138 PB1100_G_CONTROL);
139 }
140 #endif
141 au_sync();
142 break;
143
144 case VESA_VSYNC_SUSPEND:
145 case VESA_HSYNC_SUSPEND:
146 case VESA_POWERDOWN:
147 /* Turn off panel */
148 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
149 #ifdef CONFIG_MIPS_PB1100
150 if (drv_info.panel_idx == 1) {
151 au_writew(au_readw(PB1100_G_CONTROL)
152 & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
153 PB1100_G_CONTROL);
154 }
155 #endif
156 au_sync();
157 break;
158 default:
159 break;
160
161 }
162 return 0;
163 }
164
165 /*
166 * Set hardware with var settings. This will enable the controller with a specific
167 * mode, normally validated with the fb_check_var method
168 */
169 int au1100fb_setmode(struct au1100fb_device *fbdev)
170 {
171 struct fb_info *info = &fbdev->info;
172 u32 words;
173 int index;
174
175 if (!fbdev)
176 return -EINVAL;
177
178 /* Update var-dependent FB info */
179 if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
180 if (info->var.bits_per_pixel <= 8) {
181 /* palettized */
182 info->var.red.offset = 0;
183 info->var.red.length = info->var.bits_per_pixel;
184 info->var.red.msb_right = 0;
185
186 info->var.green.offset = 0;
187 info->var.green.length = info->var.bits_per_pixel;
188 info->var.green.msb_right = 0;
189
190 info->var.blue.offset = 0;
191 info->var.blue.length = info->var.bits_per_pixel;
192 info->var.blue.msb_right = 0;
193
194 info->var.transp.offset = 0;
195 info->var.transp.length = 0;
196 info->var.transp.msb_right = 0;
197
198 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
199 info->fix.line_length = info->var.xres_virtual /
200 (8/info->var.bits_per_pixel);
201 } else {
202 /* non-palettized */
203 index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
204 info->var.red = rgb_bitfields[index][0];
205 info->var.green = rgb_bitfields[index][1];
206 info->var.blue = rgb_bitfields[index][2];
207 info->var.transp = rgb_bitfields[index][3];
208
209 info->fix.visual = FB_VISUAL_TRUECOLOR;
210 info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
211 }
212 } else {
213 /* mono */
214 info->fix.visual = FB_VISUAL_MONO10;
215 info->fix.line_length = info->var.xres_virtual / 8;
216 }
217
218 info->screen_size = info->fix.line_length * info->var.yres_virtual;
219 info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
220 >> LCD_CONTROL_SM_BIT) * 90;
221
222 /* Determine BPP mode and format */
223 fbdev->regs->lcd_control = fbdev->panel->control_base;
224 fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
225 fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
226 fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
227 fbdev->regs->lcd_intenable = 0;
228 fbdev->regs->lcd_intstatus = 0;
229 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
230
231 if (panel_is_dual(fbdev->panel)) {
232 /* Second panel display seconf half of screen if possible,
233 * otherwise display the same as the first panel */
234 if (info->var.yres_virtual >= (info->var.yres << 1)) {
235 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
236 (info->fix.line_length *
237 (info->var.yres_virtual >> 1)));
238 } else {
239 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
240 }
241 }
242
243 words = info->fix.line_length / sizeof(u32);
244 if (!info->var.rotate || (info->var.rotate == 180)) {
245 words *= info->var.yres_virtual;
246 if (info->var.rotate /* 180 */) {
247 words -= (words % 8); /* should be divisable by 8 */
248 }
249 }
250 fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
251
252 fbdev->regs->lcd_pwmdiv = 0;
253 fbdev->regs->lcd_pwmhi = 0;
254
255 /* Resume controller */
256 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
257 mdelay(10);
258 au1100fb_fb_blank(VESA_NO_BLANKING, info);
259
260 return 0;
261 }
262
263 /* fb_setcolreg
264 * Set color in LCD palette.
265 */
266 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
267 {
268 struct au1100fb_device *fbdev;
269 u32 *palette;
270 u32 value;
271
272 fbdev = to_au1100fb_device(fbi);
273 palette = fbdev->regs->lcd_pallettebase;
274
275 if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
276 return -EINVAL;
277
278 if (fbi->var.grayscale) {
279 /* Convert color to grayscale */
280 red = green = blue =
281 (19595 * red + 38470 * green + 7471 * blue) >> 16;
282 }
283
284 if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
285 /* Place color in the pseudopalette */
286 if (regno > 16)
287 return -EINVAL;
288
289 palette = (u32*)fbi->pseudo_palette;
290
291 red >>= (16 - fbi->var.red.length);
292 green >>= (16 - fbi->var.green.length);
293 blue >>= (16 - fbi->var.blue.length);
294
295 value = (red << fbi->var.red.offset) |
296 (green << fbi->var.green.offset)|
297 (blue << fbi->var.blue.offset);
298 value &= 0xFFFF;
299
300 } else if (panel_is_active(fbdev->panel)) {
301 /* COLOR TFT PALLETTIZED (use RGB 565) */
302 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
303 value &= 0xFFFF;
304
305 } else if (panel_is_color(fbdev->panel)) {
306 /* COLOR STN MODE */
307 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
308 ((green >> 8) & 0x00F0) |
309 (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
310 value &= 0xFFF;
311 } else {
312 /* MONOCHROME MODE */
313 value = (green >> 12) & 0x000F;
314 value &= 0xF;
315 }
316
317 palette[regno] = value;
318
319 return 0;
320 }
321
322 /* fb_pan_display
323 * Pan display in x and/or y as specified
324 */
325 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
326 {
327 struct au1100fb_device *fbdev;
328 int dy;
329
330 fbdev = to_au1100fb_device(fbi);
331
332 print_dbg("fb_pan_display %p %p", var, fbi);
333
334 if (!var || !fbdev) {
335 return -EINVAL;
336 }
337
338 if (var->xoffset - fbi->var.xoffset) {
339 /* No support for X panning for now! */
340 return -EINVAL;
341 }
342
343 print_dbg("fb_pan_display 2 %p %p", var, fbi);
344 dy = var->yoffset - fbi->var.yoffset;
345 if (dy) {
346
347 u32 dmaaddr;
348
349 print_dbg("Panning screen of %d lines", dy);
350
351 dmaaddr = fbdev->regs->lcd_dmaaddr0;
352 dmaaddr += (fbi->fix.line_length * dy);
353
354 /* TODO: Wait for current frame to finished */
355 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
356
357 if (panel_is_dual(fbdev->panel)) {
358 dmaaddr = fbdev->regs->lcd_dmaaddr1;
359 dmaaddr += (fbi->fix.line_length * dy);
360 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
361 }
362 }
363 print_dbg("fb_pan_display 3 %p %p", var, fbi);
364
365 return 0;
366 }
367
368 /* fb_rotate
369 * Rotate the display of this angle. This doesn't seems to be used by the core,
370 * but as our hardware supports it, so why not implementing it...
371 */
372 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
373 {
374 struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
375
376 print_dbg("fb_rotate %p %d", fbi, angle);
377
378 if (fbdev && (angle > 0) && !(angle % 90)) {
379
380 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
381
382 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
383 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
384
385 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
386 }
387 }
388
389 /* fb_mmap
390 * Map video memory in user space. We don't use the generic fb_mmap method mainly
391 * to allow the use of the TLB streaming flag (CCA=6)
392 */
393 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
394 {
395 struct au1100fb_device *fbdev;
396 unsigned int len;
397 unsigned long start=0, off;
398
399 fbdev = to_au1100fb_device(fbi);
400
401 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
402 return -EINVAL;
403 }
404
405 start = fbdev->fb_phys & PAGE_MASK;
406 len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
407
408 off = vma->vm_pgoff << PAGE_SHIFT;
409
410 if ((vma->vm_end - vma->vm_start + off) > len) {
411 return -EINVAL;
412 }
413
414 off += start;
415 vma->vm_pgoff = off >> PAGE_SHIFT;
416
417 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
418 pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
419
420 vma->vm_flags |= VM_IO;
421
422 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
423 vma->vm_end - vma->vm_start,
424 vma->vm_page_prot)) {
425 return -EAGAIN;
426 }
427
428 return 0;
429 }
430
431 /* fb_cursor
432 * Used to disable cursor drawing...
433 */
434 int au1100fb_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
435 {
436 if (nocursor)
437 return 0;
438 else
439 return -EINVAL; /* just to force soft_cursor() call */
440 }
441
442 static struct fb_ops au1100fb_ops =
443 {
444 .owner = THIS_MODULE,
445 .fb_setcolreg = au1100fb_fb_setcolreg,
446 .fb_blank = au1100fb_fb_blank,
447 .fb_pan_display = au1100fb_fb_pan_display,
448 .fb_fillrect = cfb_fillrect,
449 .fb_copyarea = cfb_copyarea,
450 .fb_imageblit = cfb_imageblit,
451 .fb_rotate = au1100fb_fb_rotate,
452 .fb_mmap = au1100fb_fb_mmap,
453 .fb_cursor = au1100fb_fb_cursor,
454 };
455
456
457 /*-------------------------------------------------------------------------*/
458
459 /* AU1100 LCD controller device driver */
460
461 static int __devinit au1100fb_drv_probe(struct platform_device *dev)
462 {
463 struct au1100fb_device *fbdev = NULL;
464 struct resource *regs_res;
465 unsigned long page;
466 u32 sys_clksrc;
467
468 if (!dev)
469 return -EINVAL;
470
471 /* Allocate new device private */
472 if (!(fbdev = kzalloc(sizeof(struct au1100fb_device), GFP_KERNEL))) {
473 print_err("fail to allocate device private record");
474 return -ENOMEM;
475 }
476
477 fbdev->panel = &known_lcd_panels[drv_info.panel_idx];
478
479 platform_set_drvdata(dev, (void *)fbdev);
480
481 /* Allocate region for our registers and map them */
482 if (!(regs_res = platform_get_resource(to_platform_device(dev),
483 IORESOURCE_MEM, 0))) {
484 print_err("fail to retrieve registers resource");
485 return -EFAULT;
486 }
487
488 au1100fb_fix.mmio_start = regs_res->start;
489 au1100fb_fix.mmio_len = resource_size(regs_res);
490
491 if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
492 DRIVER_NAME)) {
493 print_err("fail to lock memory region at 0x%08lx",
494 au1100fb_fix.mmio_start);
495 return -EBUSY;
496 }
497
498 fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
499
500 print_dbg("Register memory map at %p", fbdev->regs);
501 print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
502
503
504
505 /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
506 fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
507 (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
508
509 fbdev->fb_mem = dma_alloc_coherent(dev, PAGE_ALIGN(fbdev->fb_len),
510 &fbdev->fb_phys, GFP_KERNEL);
511 if (!fbdev->fb_mem) {
512 print_err("fail to allocate frambuffer (size: %dK))",
513 fbdev->fb_len / 1024);
514 return -ENOMEM;
515 }
516
517 au1100fb_fix.smem_start = fbdev->fb_phys;
518 au1100fb_fix.smem_len = fbdev->fb_len;
519
520 /*
521 * Set page reserved so that mmap will work. This is necessary
522 * since we'll be remapping normal memory.
523 */
524 for (page = (unsigned long)fbdev->fb_mem;
525 page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
526 page += PAGE_SIZE) {
527 #if CONFIG_DMA_NONCOHERENT
528 SetPageReserved(virt_to_page(CAC_ADDR(page)));
529 #else
530 SetPageReserved(virt_to_page(page));
531 #endif
532 }
533
534 print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
535 print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
536
537 /* Setup LCD clock to AUX (48 MHz) */
538 sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
539 au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
540
541 /* load the panel info into the var struct */
542 au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
543 au1100fb_var.xres = fbdev->panel->xres;
544 au1100fb_var.xres_virtual = au1100fb_var.xres;
545 au1100fb_var.yres = fbdev->panel->yres;
546 au1100fb_var.yres_virtual = au1100fb_var.yres;
547
548 fbdev->info.screen_base = fbdev->fb_mem;
549 fbdev->info.fbops = &au1100fb_ops;
550 fbdev->info.fix = au1100fb_fix;
551
552 if (!(fbdev->info.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL))) {
553 return -ENOMEM;
554 }
555
556 if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
557 print_err("Fail to allocate colormap (%d entries)",
558 AU1100_LCD_NBR_PALETTE_ENTRIES);
559 kfree(fbdev->info.pseudo_palette);
560 return -EFAULT;
561 }
562
563 fbdev->info.var = au1100fb_var;
564
565 /* Set h/w registers */
566 au1100fb_setmode(fbdev);
567
568 /* Register new framebuffer */
569 if (register_framebuffer(&fbdev->info) < 0) {
570 print_err("cannot register new framebuffer");
571 goto failed;
572 }
573
574 return 0;
575
576 failed:
577 if (fbdev->regs) {
578 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
579 }
580 if (fbdev->fb_mem) {
581 dma_free_noncoherent(dev, fbdev->fb_len, fbdev->fb_mem, fbdev->fb_phys);
582 }
583 if (fbdev->info.cmap.len != 0) {
584 fb_dealloc_cmap(&fbdev->info.cmap);
585 }
586 kfree(fbdev);
587 platform_set_drvdata(dev, NULL);
588
589 return 0;
590 }
591
592 int au1100fb_drv_remove(struct platform_device *dev)
593 {
594 struct au1100fb_device *fbdev = NULL;
595
596 if (!dev)
597 return -ENODEV;
598
599 fbdev = (struct au1100fb_device *) platform_get_drvdata(dev);
600
601 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
602 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
603 #endif
604 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
605
606 /* Clean up all probe data */
607 unregister_framebuffer(&fbdev->info);
608
609 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
610
611 dma_free_coherent(dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem, fbdev->fb_phys);
612
613 fb_dealloc_cmap(&fbdev->info.cmap);
614 kfree(fbdev->info.pseudo_palette);
615 kfree((void*)fbdev);
616
617 return 0;
618 }
619
620 #ifdef CONFIG_PM
621 static u32 sys_clksrc;
622 static struct au1100fb_regs fbregs;
623
624 int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
625 {
626 struct au1100fb_device *fbdev = platform_get_drvdata(dev);
627
628 if (!fbdev)
629 return 0;
630
631 /* Save the clock source state */
632 sys_clksrc = au_readl(SYS_CLKSRC);
633
634 /* Blank the LCD */
635 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
636
637 /* Stop LCD clocking */
638 au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
639
640 memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
641
642 return 0;
643 }
644
645 int au1100fb_drv_resume(struct platform_device *dev)
646 {
647 struct au1100fb_device *fbdev = platform_get_drvdata(dev);
648
649 if (!fbdev)
650 return 0;
651
652 memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
653
654 /* Restart LCD clocking */
655 au_writel(sys_clksrc, SYS_CLKSRC);
656
657 /* Unblank the LCD */
658 au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
659
660 return 0;
661 }
662 #else
663 #define au1100fb_drv_suspend NULL
664 #define au1100fb_drv_resume NULL
665 #endif
666
667 static struct platform_driver au1100fb_driver = {
668 .driver = {
669 .name = "au1100-lcd",
670 .owner = THIS_MODULE,
671 },
672 .probe = au1100fb_drv_probe,
673 .remove = au1100fb_drv_remove,
674 .suspend = au1100fb_drv_suspend,
675 .resume = au1100fb_drv_resume,
676 };
677
678 /*-------------------------------------------------------------------------*/
679
680 /* Kernel driver */
681
682 int au1100fb_setup(char *options)
683 {
684 char* this_opt;
685 int num_panels = ARRAY_SIZE(known_lcd_panels);
686 char* mode = NULL;
687 int panel_idx = 0;
688
689 if (num_panels <= 0) {
690 print_err("No LCD panels supported by driver!");
691 return -EFAULT;
692 }
693
694 if (options) {
695 while ((this_opt = strsep(&options,",")) != NULL) {
696 /* Panel option */
697 if (!strncmp(this_opt, "panel:", 6)) {
698 int i;
699 this_opt += 6;
700 for (i = 0; i < num_panels; i++) {
701 if (!strncmp(this_opt,
702 known_lcd_panels[i].name,
703 strlen(this_opt))) {
704 panel_idx = i;
705 break;
706 }
707 }
708 if (i >= num_panels) {
709 print_warn("Panel %s not supported!", this_opt);
710 }
711 }
712 if (!strncmp(this_opt, "nocursor", 8)) {
713 this_opt += 8;
714 nocursor = 1;
715 print_info("Cursor disabled");
716 }
717 /* Mode option (only option that start with digit) */
718 else if (isdigit(this_opt[0])) {
719 mode = kstrdup(this_opt, GFP_KERNEL);
720 if (!mode) {
721 print_err("memory allocation failed");
722 return -ENOMEM;
723 }
724 }
725 /* Unsupported option */
726 else {
727 print_warn("Unsupported option \"%s\"", this_opt);
728 }
729 }
730 }
731
732 drv_info.panel_idx = panel_idx;
733 drv_info.opt_mode = mode;
734
735 print_info("Panel=%s Mode=%s",
736 known_lcd_panels[drv_info.panel_idx].name,
737 drv_info.opt_mode ? drv_info.opt_mode : "default");
738
739 return 0;
740 }
741
742 int __init au1100fb_init(void)
743 {
744 char* options;
745 int ret;
746
747 print_info("" DRIVER_DESC "");
748
749 memset(&drv_info, 0, sizeof(drv_info));
750
751 if (fb_get_options(DRIVER_NAME, &options))
752 return -ENODEV;
753
754 /* Setup driver with options */
755 ret = au1100fb_setup(options);
756 if (ret < 0) {
757 print_err("Fail to setup driver");
758 return ret;
759 }
760
761 return platform_driver_register(&au1100fb_driver);
762 }
763
764 void __exit au1100fb_cleanup(void)
765 {
766 platform_driver_unregister(&au1100fb_driver);
767
768 kfree(drv_info.opt_mode);
769 }
770
771 module_init(au1100fb_init);
772 module_exit(au1100fb_cleanup);
773
774 MODULE_DESCRIPTION(DRIVER_DESC);
775 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree