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[PATCH] radix-tree documentation cleanups
[linux-2.6/mini2440.git] / drivers / video / au1100fb.c
blob3d04b2def0f165d5ab7cbc2afadace2fa7896eb8
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 * Copyright 2002 MontaVista Software
11 * Author: MontaVista Software, Inc.
12 * ppopov@mvista.com or source@mvista.com
13 *
14 * Copyright 2002 Alchemy Semiconductor
15 * Author: Alchemy Semiconductor
16 *
17 * Based on:
18 * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
19 * Created 28 Dec 1997 by Geert Uytterhoeven
20 *
21 * This program is free software; you can redistribute it and/or modify it
22 * under the terms of the GNU General Public License as published by the
23 * Free Software Foundation; either version 2 of the License, or (at your
24 * option) any later version.
25 *
26 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
29 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
32 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
33 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * You should have received a copy of the GNU General Public License along
38 * with this program; if not, write to the Free Software Foundation, Inc.,
39 * 675 Mass Ave, Cambridge, MA 02139, USA.
40 */
41 #include <linux/config.h>
42 #include <linux/module.h>
43 #include <linux/kernel.h>
44 #include <linux/errno.h>
45 #include <linux/string.h>
46 #include <linux/mm.h>
47 #include <linux/fb.h>
48 #include <linux/init.h>
49 #include <linux/interrupt.h>
50 #include <linux/ctype.h>
51 #include <linux/dma-mapping.h>
52 #include <linux/platform_device.h>
53
54 #include <asm/mach-au1x00/au1000.h>
55
56 #define DEBUG 0
57
58 #include "au1100fb.h"
59
60 /*
61 * Sanity check. If this is a new Au1100 based board, search for
62 * the PB1100 ifdefs to make sure you modify the code accordingly.
63 */
64 #if defined(CONFIG_MIPS_PB1100)
65 #include <asm/mach-pb1x00/pb1100.h>
66 #elif defined(CONFIG_MIPS_DB1100)
67 #include <asm/mach-db1x00/db1x00.h>
68 #else
69 #error "Unknown Au1100 board, Au1100 FB driver not supported"
70 #endif
71
72 #define DRIVER_NAME "au1100fb"
73 #define DRIVER_DESC "LCD controller driver for AU1100 processors"
74
75 #define to_au1100fb_device(_info) \
76 (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
77
78 /* Bitfields format supported by the controller. Note that the order of formats
79 * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
80 * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
81 */
82 struct fb_bitfield rgb_bitfields[][4] =
83 {
84 /* Red, Green, Blue, Transp */
85 { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
86 { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
87 { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
88 { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
89 { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
90
91 /* The last is used to describe 12bpp format */
92 { { 8, 4, 0 }, { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
93 };
94
95 static struct fb_fix_screeninfo au1100fb_fix __initdata = {
96 .id = "AU1100 FB",
97 .xpanstep = 1,
98 .ypanstep = 1,
99 .type = FB_TYPE_PACKED_PIXELS,
100 .accel = FB_ACCEL_NONE,
101 };
102
103 static struct fb_var_screeninfo au1100fb_var __initdata = {
104 .activate = FB_ACTIVATE_NOW,
105 .height = -1,
106 .width = -1,
107 .vmode = FB_VMODE_NONINTERLACED,
108 };
109
110 static struct au1100fb_drv_info drv_info;
111
112 /*
113 * Set hardware with var settings. This will enable the controller with a specific
114 * mode, normally validated with the fb_check_var method
115 */
116 int au1100fb_setmode(struct au1100fb_device *fbdev)
117 {
118 struct fb_info *info = &fbdev->info;
119 u32 words;
120 int index;
121
122 if (!fbdev)
123 return -EINVAL;
124
125 /* Update var-dependent FB info */
126 if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
127 if (info->var.bits_per_pixel <= 8) {
128 /* palettized */
129 info->var.red.offset = 0;
130 info->var.red.length = info->var.bits_per_pixel;
131 info->var.red.msb_right = 0;
132
133 info->var.green.offset = 0;
134 info->var.green.length = info->var.bits_per_pixel;
135 info->var.green.msb_right = 0;
136
137 info->var.blue.offset = 0;
138 info->var.blue.length = info->var.bits_per_pixel;
139 info->var.blue.msb_right = 0;
140
141 info->var.transp.offset = 0;
142 info->var.transp.length = 0;
143 info->var.transp.msb_right = 0;
144
145 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
146 info->fix.line_length = info->var.xres_virtual /
147 (8/info->var.bits_per_pixel);
148 } else {
149 /* non-palettized */
150 index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
151 info->var.red = rgb_bitfields[index][0];
152 info->var.green = rgb_bitfields[index][1];
153 info->var.blue = rgb_bitfields[index][2];
154 info->var.transp = rgb_bitfields[index][3];
155
156 info->fix.visual = FB_VISUAL_TRUECOLOR;
157 info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
158 }
159 } else {
160 /* mono */
161 info->fix.visual = FB_VISUAL_MONO10;
162 info->fix.line_length = info->var.xres_virtual / 8;
163 }
164
165 info->screen_size = info->fix.line_length * info->var.yres_virtual;
166
167 /* Determine BPP mode and format */
168 fbdev->regs->lcd_control = fbdev->panel->control_base |
169 ((info->var.rotate/90) << LCD_CONTROL_SM_BIT);
170
171 fbdev->regs->lcd_intenable = 0;
172 fbdev->regs->lcd_intstatus = 0;
173
174 fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
175
176 fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
177
178 fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
179
180 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
181
182 if (panel_is_dual(fbdev->panel)) {
183 /* Second panel display seconf half of screen if possible,
184 * otherwise display the same as the first panel */
185 if (info->var.yres_virtual >= (info->var.yres << 1)) {
186 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
187 (info->fix.line_length *
188 (info->var.yres_virtual >> 1)));
189 } else {
190 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
191 }
192 }
193
194 words = info->fix.line_length / sizeof(u32);
195 if (!info->var.rotate || (info->var.rotate == 180)) {
196 words *= info->var.yres_virtual;
197 if (info->var.rotate /* 180 */) {
198 words -= (words % 8); /* should be divisable by 8 */
199 }
200 }
201 fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
202
203 fbdev->regs->lcd_pwmdiv = 0;
204 fbdev->regs->lcd_pwmhi = 0;
205
206 /* Resume controller */
207 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
208
209 return 0;
210 }
211
212 /* fb_setcolreg
213 * Set color in LCD palette.
214 */
215 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
216 {
217 struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
218 u32 *palette = fbdev->regs->lcd_pallettebase;
219 u32 value;
220
221 if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
222 return -EINVAL;
223
224 if (fbi->var.grayscale) {
225 /* Convert color to grayscale */
226 red = green = blue =
227 (19595 * red + 38470 * green + 7471 * blue) >> 16;
228 }
229
230 if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
231 /* Place color in the pseudopalette */
232 if (regno > 16)
233 return -EINVAL;
234
235 palette = (u32*)fbi->pseudo_palette;
236
237 red >>= (16 - fbi->var.red.length);
238 green >>= (16 - fbi->var.green.length);
239 blue >>= (16 - fbi->var.blue.length);
240
241 value = (red << fbi->var.red.offset) |
242 (green << fbi->var.green.offset)|
243 (blue << fbi->var.blue.offset);
244 value &= 0xFFFF;
245
246 } else if (panel_is_active(fbdev->panel)) {
247 /* COLOR TFT PALLETTIZED (use RGB 565) */
248 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
249 value &= 0xFFFF;
250
251 } else if (panel_is_color(fbdev->panel)) {
252 /* COLOR STN MODE */
253 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
254 ((green >> 8) & 0x00F0) |
255 (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
256 value &= 0xFFF;
257 } else {
258 /* MONOCHROME MODE */
259 value = (green >> 12) & 0x000F;
260 value &= 0xF;
261 }
262
263 palette[regno] = value;
264
265 return 0;
266 }
267
268 /* fb_blank
269 * Blank the screen. Depending on the mode, the screen will be
270 * activated with the backlight color, or desactivated
271 */
272 int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
273 {
274 struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
275
276 print_dbg("fb_blank %d %p", blank_mode, fbi);
277
278 switch (blank_mode) {
279
280 case VESA_NO_BLANKING:
281 /* Turn on panel */
282 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
283 #ifdef CONFIG_MIPS_PB1100
284 if (drv_info.panel_idx == 1) {
285 au_writew(au_readw(PB1100_G_CONTROL)
286 | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
287 PB1100_G_CONTROL);
288 }
289 #endif
290 au_sync();
291 break;
292
293 case VESA_VSYNC_SUSPEND:
294 case VESA_HSYNC_SUSPEND:
295 case VESA_POWERDOWN:
296 /* Turn off panel */
297 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
298 #ifdef CONFIG_MIPS_PB1100
299 if (drv_info.panel_idx == 1) {
300 au_writew(au_readw(PB1100_G_CONTROL)
301 & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
302 PB1100_G_CONTROL);
303 }
304 #endif
305 au_sync();
306 break;
307 default:
308 break;
309
310 }
311 return 0;
312 }
313
314 /* fb_pan_display
315 * Pan display in x and/or y as specified
316 */
317 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
318 {
319 struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
320 int dy;
321
322 print_dbg("fb_pan_display %p %p", var, fbi);
323
324 if (!var || !fbdev) {
325 return -EINVAL;
326 }
327
328 if (var->xoffset - fbi->var.xoffset) {
329 /* No support for X panning for now! */
330 return -EINVAL;
331 }
332
333 print_dbg("fb_pan_display 2 %p %p", var, fbi);
334 dy = var->yoffset - fbi->var.yoffset;
335 if (dy) {
336
337 u32 dmaaddr;
338
339 print_dbg("Panning screen of %d lines", dy);
340
341 dmaaddr = fbdev->regs->lcd_dmaaddr0;
342 dmaaddr += (fbi->fix.line_length * dy);
343
344 /* TODO: Wait for current frame to finished */
345 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
346
347 if (panel_is_dual(fbdev->panel)) {
348 dmaaddr = fbdev->regs->lcd_dmaaddr1;
349 dmaaddr += (fbi->fix.line_length * dy);
350 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
351 }
352 }
353 print_dbg("fb_pan_display 3 %p %p", var, fbi);
354
355 return 0;
356 }
357
358 /* fb_rotate
359 * Rotate the display of this angle. This doesn't seems to be used by the core,
360 * but as our hardware supports it, so why not implementing it...
361 */
362 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
363 {
364 struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
365
366 print_dbg("fb_rotate %p %d", fbi, angle);
367
368 if (fbdev && (angle > 0) && !(angle % 90)) {
369
370 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
371
372 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
373 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
374
375 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
376 }
377 }
378
379 /* fb_mmap
380 * Map video memory in user space. We don't use the generic fb_mmap method mainly
381 * to allow the use of the TLB streaming flag (CCA=6)
382 */
383 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
384 {
385 struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
386 unsigned int len;
387 unsigned long start=0, off;
388
389 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
390 return -EINVAL;
391 }
392
393 start = fbdev->fb_phys & PAGE_MASK;
394 len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
395
396 off = vma->vm_pgoff << PAGE_SHIFT;
397
398 if ((vma->vm_end - vma->vm_start + off) > len) {
399 return -EINVAL;
400 }
401
402 off += start;
403 vma->vm_pgoff = off >> PAGE_SHIFT;
404
405 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
406 pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
407
408 vma->vm_flags |= VM_IO;
409
410 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
411 vma->vm_end - vma->vm_start,
412 vma->vm_page_prot)) {
413 return -EAGAIN;
414 }
415
416 return 0;
417 }
418
419 static struct fb_ops au1100fb_ops =
420 {
421 .owner = THIS_MODULE,
422 .fb_setcolreg = au1100fb_fb_setcolreg,
423 .fb_blank = au1100fb_fb_blank,
424 .fb_pan_display = au1100fb_fb_pan_display,
425 .fb_fillrect = cfb_fillrect,
426 .fb_copyarea = cfb_copyarea,
427 .fb_imageblit = cfb_imageblit,
428 .fb_rotate = au1100fb_fb_rotate,
429 .fb_mmap = au1100fb_fb_mmap,
430 };
431
432
433 /*-------------------------------------------------------------------------*/
434
435 /* AU1100 LCD controller device driver */
436
437 int au1100fb_drv_probe(struct device *dev)
438 {
439 struct au1100fb_device *fbdev = NULL;
440 struct resource *regs_res;
441 unsigned long page;
442 u32 sys_clksrc;
443
444 if (!dev)
445 return -EINVAL;
446
447 /* Allocate new device private */
448 if (!(fbdev = kmalloc(sizeof(struct au1100fb_device), GFP_KERNEL))) {
449 print_err("fail to allocate device private record");
450 return -ENOMEM;
451 }
452 memset((void*)fbdev, 0, sizeof(struct au1100fb_device));
453
454 fbdev->panel = &known_lcd_panels[drv_info.panel_idx];
455
456 dev_set_drvdata(dev, (void*)fbdev);
457
458 /* Allocate region for our registers and map them */
459 if (!(regs_res = platform_get_resource(to_platform_device(dev),
460 IORESOURCE_MEM, 0))) {
461 print_err("fail to retrieve registers resource");
462 return -EFAULT;
463 }
464
465 au1100fb_fix.mmio_start = regs_res->start;
466 au1100fb_fix.mmio_len = regs_res->end - regs_res->start + 1;
467
468 if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
469 DRIVER_NAME)) {
470 print_err("fail to lock memory region at 0x%08x",
471 au1100fb_fix.mmio_start);
472 return -EBUSY;
473 }
474
475 fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
476
477 print_dbg("Register memory map at %p", fbdev->regs);
478 print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
479
480
481
482 /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
483 fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
484 (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
485
486 fbdev->fb_mem = dma_alloc_coherent(dev, PAGE_ALIGN(fbdev->fb_len),
487 &fbdev->fb_phys, GFP_KERNEL);
488 if (!fbdev->fb_mem) {
489 print_err("fail to allocate frambuffer (size: %dK))",
490 fbdev->fb_len / 1024);
491 return -ENOMEM;
492 }
493
494 au1100fb_fix.smem_start = fbdev->fb_phys;
495 au1100fb_fix.smem_len = fbdev->fb_len;
496
497 /*
498 * Set page reserved so that mmap will work. This is necessary
499 * since we'll be remapping normal memory.
500 */
501 for (page = (unsigned long)fbdev->fb_mem;
502 page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
503 page += PAGE_SIZE) {
504 #if CONFIG_DMA_NONCOHERENT
505 SetPageReserved(virt_to_page(CAC_ADDR(page)));
506 #else
507 SetPageReserved(virt_to_page(page));
508 #endif
509 }
510
511 print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
512 print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
513
514 /* Setup LCD clock to AUX (48 MHz) */
515 sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
516 au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
517
518 /* load the panel info into the var struct */
519 au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
520 au1100fb_var.xres = fbdev->panel->xres;
521 au1100fb_var.xres_virtual = au1100fb_var.xres;
522 au1100fb_var.yres = fbdev->panel->yres;
523 au1100fb_var.yres_virtual = au1100fb_var.yres;
524
525 fbdev->info.screen_base = fbdev->fb_mem;
526 fbdev->info.fbops = &au1100fb_ops;
527 fbdev->info.fix = au1100fb_fix;
528
529 if (!(fbdev->info.pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL))) {
530 return -ENOMEM;
531 }
532 memset(fbdev->info.pseudo_palette, 0, sizeof(u32) * 16);
533
534 if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
535 print_err("Fail to allocate colormap (%d entries)",
536 AU1100_LCD_NBR_PALETTE_ENTRIES);
537 kfree(fbdev->info.pseudo_palette);
538 return -EFAULT;
539 }
540
541 fbdev->info.var = au1100fb_var;
542
543 /* Set h/w registers */
544 au1100fb_setmode(fbdev);
545
546 /* Register new framebuffer */
547 if (register_framebuffer(&fbdev->info) < 0) {
548 print_err("cannot register new framebuffer");
549 goto failed;
550 }
551
552 return 0;
553
554 failed:
555 if (fbdev->regs) {
556 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
557 }
558 if (fbdev->fb_mem) {
559 dma_free_noncoherent(dev, fbdev->fb_len, fbdev->fb_mem, fbdev->fb_phys);
560 }
561 if (fbdev->info.cmap.len != 0) {
562 fb_dealloc_cmap(&fbdev->info.cmap);
563 }
564 kfree(fbdev);
565 dev_set_drvdata(dev, NULL);
566
567 return 0;
568 }
569
570 int au1100fb_drv_remove(struct device *dev)
571 {
572 struct au1100fb_device *fbdev = NULL;
573
574 if (!dev)
575 return -ENODEV;
576
577 fbdev = (struct au1100fb_device*) dev_get_drvdata(dev);
578
579 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
580 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
581 #endif
582 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
583
584 /* Clean up all probe data */
585 unregister_framebuffer(&fbdev->info);
586
587 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
588
589 dma_free_coherent(dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem, fbdev->fb_phys);
590
591 fb_dealloc_cmap(&fbdev->info.cmap);
592 kfree(fbdev->info.pseudo_palette);
593 kfree((void*)fbdev);
594
595 return 0;
596 }
597
598 int au1100fb_drv_suspend(struct device *dev, u32 state, u32 level)
599 {
600 /* TODO */
601 return 0;
602 }
603
604 int au1100fb_drv_resume(struct device *dev, u32 level)
605 {
606 /* TODO */
607 return 0;
608 }
609
610 static struct device_driver au1100fb_driver = {
611 .name = "au1100-lcd",
612 .bus = &platform_bus_type,
613
614 .probe = au1100fb_drv_probe,
615 .remove = au1100fb_drv_remove,
616 .suspend = au1100fb_drv_suspend,
617 .resume = au1100fb_drv_resume,
618 };
619
620 /*-------------------------------------------------------------------------*/
621
622 /* Kernel driver */
623
624 int au1100fb_setup(char *options)
625 {
626 char* this_opt;
627 int num_panels = ARRAY_SIZE(known_lcd_panels);
628 char* mode = NULL;
629 int panel_idx = 0;
630
631 if (num_panels <= 0) {
632 print_err("No LCD panels supported by driver!");
633 return -EFAULT;
634 }
635
636 if (options) {
637 while ((this_opt = strsep(&options,",")) != NULL) {
638 /* Panel option */
639 if (!strncmp(this_opt, "panel:", 6)) {
640 int i;
641 this_opt += 6;
642 for (i = 0; i < num_panels; i++) {
643 if (!strncmp(this_opt,
644 known_lcd_panels[i].name,
645 strlen(this_opt))) {
646 panel_idx = i;
647 break;
648 }
649 }
650 if (i >= num_panels) {
651 print_warn("Panel %s not supported!", this_opt);
652 }
653 }
654 /* Mode option (only option that start with digit) */
655 else if (isdigit(this_opt[0])) {
656 mode = kmalloc(strlen(this_opt) + 1, GFP_KERNEL);
657 strncpy(mode, this_opt, strlen(this_opt) + 1);
658 }
659 /* Unsupported option */
660 else {
661 print_warn("Unsupported option \"%s\"", this_opt);
662 }
663 }
664 }
665
666 drv_info.panel_idx = panel_idx;
667 drv_info.opt_mode = mode;
668
669 print_info("Panel=%s Mode=%s",
670 known_lcd_panels[drv_info.panel_idx].name,
671 drv_info.opt_mode ? drv_info.opt_mode : "default");
672
673 return 0;
674 }
675
676 int __init au1100fb_init(void)
677 {
678 char* options;
679 int ret;
680
681 print_info("" DRIVER_DESC "");
682
683 memset(&drv_info, 0, sizeof(drv_info));
684
685 if (fb_get_options(DRIVER_NAME, &options))
686 return -ENODEV;
687
688 /* Setup driver with options */
689 ret = au1100fb_setup(options);
690 if (ret < 0) {
691 print_err("Fail to setup driver");
692 return ret;
693 }
694
695 return driver_register(&au1100fb_driver);
696 }
697
698 void __exit au1100fb_cleanup(void)
699 {
700 driver_unregister(&au1100fb_driver);
701
702 if (drv_info.opt_mode)
703 kfree(drv_info.opt_mode);
704 }
705
706 module_init(au1100fb_init);
707 module_exit(au1100fb_cleanup);
708
709 MODULE_DESCRIPTION(DRIVER_DESC);
710 MODULE_LICENSE("GPL");
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