1 /*
2 * BRIEF MODULE DESCRIPTION
3 * Au1100 LCD Driver.
4 *
5 * Copyright 2002 MontaVista Software
6 * Author: MontaVista Software, Inc.
7 * ppopov@mvista.com or source@mvista.com
8 *
9 * Copyright 2002 Alchemy Semiconductor
10 * Author: Alchemy Semiconductor
11 *
12 * Based on:
13 * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
14 * Created 28 Dec 1997 by Geert Uytterhoeven
15 *
16 * This program is free software; you can redistribute it and/or modify it
17 * under the terms of the GNU General Public License as published by the
18 * Free Software Foundation; either version 2 of the License, or (at your
19 * option) any later version.
20 *
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
24 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
27 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
28 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 * You should have received a copy of the GNU General Public License along
33 * with this program; if not, write to the Free Software Foundation, Inc.,
34 * 675 Mass Ave, Cambridge, MA 02139, USA.
35 */
36
37 #include <linux/module.h>
38 #include <linux/kernel.h>
39 #include <linux/errno.h>
40 #include <linux/string.h>
41 #include <linux/mm.h>
42 #include <linux/tty.h>
43 #include <linux/slab.h>
44 #include <linux/delay.h>
45 #include <linux/fb.h>
46 #include <linux/init.h>
47 #include <linux/pci.h>
48
49 #include <asm/au1000.h>
50 #include <asm/pb1100.h>
51 #include "au1100fb.h"
52
53 #include <video/fbcon.h>
54 #include <video/fbcon-mfb.h>
55 #include <video/fbcon-cfb2.h>
56 #include <video/fbcon-cfb4.h>
57 #include <video/fbcon-cfb8.h>
58 #include <video/fbcon-cfb16.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) || defined(CONFIG_MIPS_DB1100) || defined(CONFIG_MIPS_HYDROGEN3)
65 #else
66 error Unknown Au1100 board
67 #endif
68
69 #define CMAPSIZE 16
70
71 static int my_lcd_index; /* default is zero */
72 struct known_lcd_panels *p_lcd;
73 AU1100_LCD *p_lcd_reg = (AU1100_LCD *)AU1100_LCD_ADDR;
74
75 struct au1100fb_info {
76 struct fb_info_gen gen;
77 unsigned long fb_virt_start;
78 unsigned long fb_size;
79 unsigned long fb_phys;
80 int mmaped;
81 int nohwcursor;
82
83 struct { unsigned red, green, blue, pad; } palette[256];
84
85 #if defined(FBCON_HAS_CFB16)
86 u16 fbcon_cmap16[16];
87 #endif
88 };
89
90
91 struct au1100fb_par {
92 struct fb_var_screeninfo var;
93
94 int line_length; // in bytes
95 int cmap_len; // color-map length
96 };
97
98
99 static struct au1100fb_info fb_info;
100 static struct au1100fb_par current_par;
101 static struct display disp;
102
103 int au1100fb_init(void);
104 void au1100fb_setup(char *options, int *ints);
105 static int au1100fb_mmap(struct fb_info *fb, struct file *file,
106 struct vm_area_struct *vma);
107 static int au1100_blank(int blank_mode, struct fb_info_gen *info);
108 static int au1100fb_ioctl(struct inode *inode, struct file *file, u_int cmd,
109 u_long arg, int con, struct fb_info *info);
110
111 void au1100_nocursor(struct display *p, int mode, int xx, int yy){};
112
113 static struct fb_ops au1100fb_ops = {
114 owner: THIS_MODULE,
115 fb_get_fix: fbgen_get_fix,
116 fb_get_var: fbgen_get_var,
117 fb_set_var: fbgen_set_var,
118 fb_get_cmap: fbgen_get_cmap,
119 fb_set_cmap: fbgen_set_cmap,
120 fb_pan_display: fbgen_pan_display,
121 fb_ioctl: au1100fb_ioctl,
122 fb_mmap: au1100fb_mmap,
123 };
124
125 static void au1100_detect(void)
126 {
127 /*
128 * This function should detect the current video mode settings
129 * and store it as the default video mode
130 */
131
132 /*
133 * Yeh, well, we're not going to change any settings so we're
134 * always stuck with the default ...
135 */
136
137 }
138
139 static int au1100_encode_fix(struct fb_fix_screeninfo *fix,
140 const void *_par, struct fb_info_gen *_info)
141 {
142 struct au1100fb_info *info = (struct au1100fb_info *) _info;
143 struct au1100fb_par *par = (struct au1100fb_par *) _par;
144 struct fb_var_screeninfo *var = &par->var;
145
146 memset(fix, 0, sizeof(struct fb_fix_screeninfo));
147
148 fix->smem_start = info->fb_phys;
149 fix->smem_len = info->fb_size;
150 fix->type = FB_TYPE_PACKED_PIXELS;
151 fix->type_aux = 0;
152 fix->visual = (var->bits_per_pixel == 8) ?
153 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
154 fix->ywrapstep = 0;
155 fix->xpanstep = 1;
156 fix->ypanstep = 1;
157 fix->line_length = current_par.line_length;
158 return 0;
159 }
160
161 static void set_color_bitfields(struct fb_var_screeninfo *var)
162 {
163 switch (var->bits_per_pixel) {
164 case 8:
165 var->red.offset = 0;
166 var->red.length = 8;
167 var->green.offset = 0;
168 var->green.length = 8;
169 var->blue.offset = 0;
170 var->blue.length = 8;
171 var->transp.offset = 0;
172 var->transp.length = 0;
173 break;
174 case 16: /* RGB 565 */
175 var->red.offset = 11;
176 var->red.length = 5;
177 var->green.offset = 5;
178 var->green.length = 6;
179 var->blue.offset = 0;
180 var->blue.length = 5;
181 var->transp.offset = 0;
182 var->transp.length = 0;
183 break;
184 }
185
186 var->red.msb_right = 0;
187 var->green.msb_right = 0;
188 var->blue.msb_right = 0;
189 var->transp.msb_right = 0;
190 }
191
192 static int au1100_decode_var(const struct fb_var_screeninfo *var,
193 void *_par, struct fb_info_gen *_info)
194 {
195
196 struct au1100fb_par *par = (struct au1100fb_par *)_par;
197
198 /*
199 * Don't allow setting any of these yet: xres and yres don't
200 * make sense for LCD panels.
201 */
202 if (var->xres != p_lcd->xres ||
203 var->yres != p_lcd->yres ||
204 var->xres != p_lcd->xres ||
205 var->yres != p_lcd->yres) {
206 return -EINVAL;
207 }
208 if(var->bits_per_pixel != p_lcd->bpp) {
209 return -EINVAL;
210 }
211
212 memset(par, 0, sizeof(struct au1100fb_par));
213 par->var = *var;
214
215 /* FIXME */
216 switch (var->bits_per_pixel) {
217 case 8:
218 par->var.bits_per_pixel = 8;
219 break;
220 case 16:
221 par->var.bits_per_pixel = 16;
222 break;
223 default:
224 printk("color depth %d bpp not supported\n",
225 var->bits_per_pixel);
226 return -EINVAL;
227
228 }
229 set_color_bitfields(&par->var);
230 par->cmap_len = (par->var.bits_per_pixel == 8) ? 256 : 16;
231 return 0;
232 }
233
234 static int au1100_encode_var(struct fb_var_screeninfo *var,
235 const void *par, struct fb_info_gen *_info)
236 {
237
238 *var = ((struct au1100fb_par *)par)->var;
239 return 0;
240 }
241
242 static void
243 au1100_get_par(void *_par, struct fb_info_gen *_info)
244 {
245 *(struct au1100fb_par *)_par = current_par;
246 }
247
248 static void au1100_set_par(const void *par, struct fb_info_gen *info)
249 {
250 /* nothing to do: we don't change any settings */
251 }
252
253 static int au1100_getcolreg(unsigned regno, unsigned *red, unsigned *green,
254 unsigned *blue, unsigned *transp,
255 struct fb_info *info)
256 {
257
258 struct au1100fb_info* i = (struct au1100fb_info*)info;
259
260 if (regno > 255)
261 return 1;
262
263 *red = i->palette[regno].red;
264 *green = i->palette[regno].green;
265 *blue = i->palette[regno].blue;
266 *transp = 0;
267
268 return 0;
269 }
270
271 static int au1100_setcolreg(unsigned regno, unsigned red, unsigned green,
272 unsigned blue, unsigned transp,
273 struct fb_info *info)
274 {
275 struct au1100fb_info* i = (struct au1100fb_info *)info;
276 u32 rgbcol;
277
278 if (regno > 255)
279 return 1;
280
281 i->palette[regno].red = red;
282 i->palette[regno].green = green;
283 i->palette[regno].blue = blue;
284
285 switch(p_lcd->bpp) {
286 #ifdef FBCON_HAS_CFB8
287 case 8:
288 red >>= 10;
289 green >>= 10;
290 blue >>= 10;
291 p_lcd_reg->lcd_pallettebase[regno] = (blue&0x1f) |
292 ((green&0x3f)<<5) | ((red&0x1f)<<11);
293 break;
294 #endif
295 #ifdef FBCON_HAS_CFB16
296 case 16:
297 i->fbcon_cmap16[regno] =
298 ((red & 0xf800) >> 0) |
299 ((green & 0xfc00) >> 5) |
300 ((blue & 0xf800) >> 11);
301 break;
302 #endif
303 default:
304 break;
305 }
306
307 return 0;
308 }
309
310
311 static int au1100_blank(int blank_mode, struct fb_info_gen *_info)
312 {
313
314 switch (blank_mode) {
315 case VESA_NO_BLANKING:
316 /* turn on panel */
317 //printk("turn on panel\n");
318 #ifdef CONFIG_MIPS_PB1100
319 p_lcd_reg->lcd_control |= LCD_CONTROL_GO;
320 au_writew(au_readw(PB1100_G_CONTROL) | p_lcd->mode_backlight,
321 PB1100_G_CONTROL);
322 #endif
323 #ifdef CONFIG_MIPS_HYDROGEN3
324 /* Turn controller & power supply on, GPIO213 */
325 au_writel(0x20002000, 0xB1700008);
326 au_writel(0x00040000, 0xB1900108);
327 au_writel(0x01000100, 0xB1700008);
328 #endif
329 au_sync();
330 break;
331
332 case VESA_VSYNC_SUSPEND:
333 case VESA_HSYNC_SUSPEND:
334 case VESA_POWERDOWN:
335 /* turn off panel */
336 //printk("turn off panel\n");
337 #ifdef CONFIG_MIPS_PB1100
338 au_writew(au_readw(PB1100_G_CONTROL) & ~p_lcd->mode_backlight,
339 PB1100_G_CONTROL);
340 p_lcd_reg->lcd_control &= ~LCD_CONTROL_GO;
341 #endif
342 au_sync();
343 break;
344 default:
345 break;
346
347 }
348 return 0;
349 }
350
351 static void au1100_set_disp(const void *unused, struct display *disp,
352 struct fb_info_gen *info)
353 {
354 disp->screen_base = (char *)fb_info.fb_virt_start;
355
356 switch (disp->var.bits_per_pixel) {
357 #ifdef FBCON_HAS_CFB8
358 case 8:
359 disp->dispsw = &fbcon_cfb8;
360 if (fb_info.nohwcursor)
361 fbcon_cfb8.cursor = au1100_nocursor;
362 break;
363 #endif
364 #ifdef FBCON_HAS_CFB16
365 case 16:
366 disp->dispsw = &fbcon_cfb16;
367 disp->dispsw_data = fb_info.fbcon_cmap16;
368 if (fb_info.nohwcursor)
369 fbcon_cfb16.cursor = au1100_nocursor;
370 break;
371 #endif
372 default:
373 disp->dispsw = &fbcon_dummy;
374 disp->dispsw_data = NULL;
375 break;
376 }
377 }
378
379 static int
380 au1100fb_mmap(struct fb_info *_fb,
381 struct file *file,
382 struct vm_area_struct *vma)
383 {
384 unsigned int len;
385 unsigned long start=0, off;
386 struct au1100fb_info *fb = (struct au1100fb_info *)_fb;
387
388 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
389 return -EINVAL;
390 }
391
392 start = fb_info.fb_phys & PAGE_MASK;
393 len = PAGE_ALIGN((start & ~PAGE_MASK) + fb_info.fb_size);
394
395 off = vma->vm_pgoff << PAGE_SHIFT;
396
397 if ((vma->vm_end - vma->vm_start + off) > len) {
398 return -EINVAL;
399 }
400
401 off += start;
402 vma->vm_pgoff = off >> PAGE_SHIFT;
403
404 pgprot_val(vma->vm_page_prot) &= ~_CACHE_MASK;
405 //pgprot_val(vma->vm_page_prot) |= _CACHE_CACHABLE_NONCOHERENT;
406 pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
407
408 /* This is an IO map - tell maydump to skip this VMA */
409 vma->vm_flags |= VM_IO;
410
411 if (io_remap_page_range(vma, vma->vm_start, off,
412 vma->vm_end - vma->vm_start,
413 vma->vm_page_prot)) {
414 return -EAGAIN;
415 }
416
417 fb->mmaped = 1;
418 return 0;
419 }
420
421 int au1100_pan_display(const struct fb_var_screeninfo *var,
422 struct fb_info_gen *info)
423 {
424 return 0;
425 }
426
427 static int au1100fb_ioctl(struct inode *inode, struct file *file, u_int cmd,
428 u_long arg, int con, struct fb_info *info)
429 {
430 /* nothing to do yet */
431 return -EINVAL;
432 }
433
434 static struct fbgen_hwswitch au1100_switch = {
435 au1100_detect,
436 au1100_encode_fix,
437 au1100_decode_var,
438 au1100_encode_var,
439 au1100_get_par,
440 au1100_set_par,
441 au1100_getcolreg,
442 au1100_setcolreg,
443 au1100_pan_display,
444 au1100_blank,
445 au1100_set_disp
446 };
447
448
449 int au1100_setmode(void)
450 {
451 int words;
452
453 /* FIXME Need to accomodate for swivel mode and 12bpp, <8bpp*/
454 switch (p_lcd->mode_control & LCD_CONTROL_SM)
455 {
456 case LCD_CONTROL_SM_0:
457 case LCD_CONTROL_SM_180:
458 words = (p_lcd->xres * p_lcd->yres * p_lcd->bpp) / 32;
459 break;
460 case LCD_CONTROL_SM_90:
461 case LCD_CONTROL_SM_270:
462 /* is this correct? */
463 words = (p_lcd->xres * p_lcd->bpp) / 8;
464 break;
465 default:
466 printk("mode_control reg not initialized\n");
467 return -EINVAL;
468 }
469
470 /*
471 * Setup LCD controller
472 */
473
474 p_lcd_reg->lcd_control = p_lcd->mode_control;
475 p_lcd_reg->lcd_intstatus = 0;
476 p_lcd_reg->lcd_intenable = 0;
477 p_lcd_reg->lcd_horztiming = p_lcd->mode_horztiming;
478 p_lcd_reg->lcd_verttiming = p_lcd->mode_verttiming;
479 p_lcd_reg->lcd_clkcontrol = p_lcd->mode_clkcontrol;
480 p_lcd_reg->lcd_words = words - 1;
481 p_lcd_reg->lcd_dmaaddr0 = fb_info.fb_phys;
482
483 /* turn on panel */
484 #ifdef CONFIG_MIPS_PB1100
485 au_writew(au_readw(PB1100_G_CONTROL) | p_lcd->mode_backlight,
486 PB1100_G_CONTROL);
487 #endif
488 #ifdef CONFIG_MIPS_HYDROGEN3
489 /* Turn controller & power supply on, GPIO213 */
490 au_writel(0x20002000, 0xB1700008);
491 au_writel(0x00040000, 0xB1900108);
492 au_writel(0x01000100, 0xB1700008);
493 #endif
494
495 p_lcd_reg->lcd_control |= LCD_CONTROL_GO;
496
497 return 0;
498 }
499
500
501 int __init au1100fb_init(void)
502 {
503 uint32 sys_clksrc;
504 unsigned long page;
505
506 /*
507 * Get the panel information/display mode and update the registry
508 */
509 p_lcd = &panels[my_lcd_index];
510
511 switch (p_lcd->mode_control & LCD_CONTROL_SM)
512 {
513 case LCD_CONTROL_SM_0:
514 case LCD_CONTROL_SM_180:
515 p_lcd->xres =
516 (p_lcd->mode_horztiming & LCD_HORZTIMING_PPL) + 1;
517 p_lcd->yres =
518 (p_lcd->mode_verttiming & LCD_VERTTIMING_LPP) + 1;
519 break;
520 case LCD_CONTROL_SM_90:
521 case LCD_CONTROL_SM_270:
522 p_lcd->yres =
523 (p_lcd->mode_horztiming & LCD_HORZTIMING_PPL) + 1;
524 p_lcd->xres =
525 (p_lcd->mode_verttiming & LCD_VERTTIMING_LPP) + 1;
526 break;
527 }
528
529 /*
530 * Panel dimensions x bpp must be divisible by 32
531 */
532 if (((p_lcd->yres * p_lcd->bpp) % 32) != 0)
533 printk("VERT %% 32\n");
534 if (((p_lcd->xres * p_lcd->bpp) % 32) != 0)
535 printk("HORZ %% 32\n");
536
537 /*
538 * Allocate LCD framebuffer from system memory
539 */
540 fb_info.fb_size = (p_lcd->xres * p_lcd->yres * p_lcd->bpp) / 8;
541
542 current_par.var.xres = p_lcd->xres;
543 current_par.var.xres_virtual = p_lcd->xres;
544 current_par.var.yres = p_lcd->yres;
545 current_par.var.yres_virtual = p_lcd->yres;
546 current_par.var.bits_per_pixel = p_lcd->bpp;
547
548 /* FIX!!! only works for 8/16 bpp */
549 current_par.line_length = p_lcd->xres * p_lcd->bpp / 8; /* in bytes */
550 fb_info.fb_virt_start = (unsigned long )
551 __get_free_pages(GFP_ATOMIC | GFP_DMA,
552 get_order(fb_info.fb_size + 0x1000));
553 if (!fb_info.fb_virt_start) {
554 printk("Unable to allocate fb memory\n");
555 return -ENOMEM;
556 }
557 fb_info.fb_phys = virt_to_bus((void *)fb_info.fb_virt_start);
558
559 /*
560 * Set page reserved so that mmap will work. This is necessary
561 * since we'll be remapping normal memory.
562 */
563 for (page = fb_info.fb_virt_start;
564 page < PAGE_ALIGN(fb_info.fb_virt_start + fb_info.fb_size);
565 page += PAGE_SIZE) {
566 SetPageReserved(virt_to_page(page));
567 }
568
569 memset((void *)fb_info.fb_virt_start, 0, fb_info.fb_size);
570
571 /* set freqctrl now to allow more time to stabilize */
572 /* zero-out out LCD bits */
573 sys_clksrc = au_readl(SYS_CLKSRC) & ~0x000003e0;
574 sys_clksrc |= p_lcd->mode_toyclksrc;
575 au_writel(sys_clksrc, SYS_CLKSRC);
576
577 /* FIXME add check to make sure auxpll is what is expected! */
578 au1100_setmode();
579
580 fb_info.gen.parsize = sizeof(struct au1100fb_par);
581 fb_info.gen.fbhw = &au1100_switch;
582
583 strcpy(fb_info.gen.info.modename, "Au1100 LCD");
584 fb_info.gen.info.changevar = NULL;
585 fb_info.gen.info.node = -1;
586
587 fb_info.gen.info.fbops = &au1100fb_ops;
588 fb_info.gen.info.disp = &disp;
589 fb_info.gen.info.switch_con = &fbgen_switch;
590 fb_info.gen.info.updatevar = &fbgen_update_var;
591 fb_info.gen.info.blank = &fbgen_blank;
592 fb_info.gen.info.flags = FBINFO_FLAG_DEFAULT;
593
594 /* This should give a reasonable default video mode */
595 fbgen_get_var(&disp.var, -1, &fb_info.gen.info);
596 fbgen_do_set_var(&disp.var, 1, &fb_info.gen);
597 fbgen_set_disp(-1, &fb_info.gen);
598 fbgen_install_cmap(0, &fb_info.gen);
599 if (register_framebuffer(&fb_info.gen.info) < 0)
600 return -EINVAL;
601 printk(KERN_INFO "fb%d: %s frame buffer device\n",
602 GET_FB_IDX(fb_info.gen.info.node),
603 fb_info.gen.info.modename);
604
605 return 0;
606 }
607
608
609 void au1100fb_cleanup(struct fb_info *info)
610 {
611 unregister_framebuffer(info);
612 }
613
614
615 void au1100fb_setup(char *options, int *ints)
616 {
617 char* this_opt;
618 int i;
619 int num_panels = sizeof(panels)/sizeof(struct known_lcd_panels);
620
621
622 if (!options || !*options)
623 return;
624
625 for(this_opt=strtok(options, ","); this_opt;
626 this_opt=strtok(NULL, ",")) {
627 if (!strncmp(this_opt, "panel:", 6)) {
628 #if defined(CONFIG_MIPS_PB1100) || defined(CONFIG_MIPS_DB1100)
629 /* Read Pb1100 Switch S10 ? */
630 if (!strncmp(this_opt+6, "s10", 3))
631 {
632 int panel;
633 panel = *(volatile int *)0xAE000008; /* BCSR SWITCHES */
634 panel >>= 8;
635 panel &= 0x0F;
636 if (panel >= num_panels) panel = 0;
637 my_lcd_index = panel;
638 }
639 else
640 #endif
641 /* Get the panel name, everything else if fixed */
642 for (i=0; i<num_panels; i++) {
643 if (!strncmp(this_opt+6, panels[i].panel_name,
644 strlen(this_opt))) {
645 my_lcd_index = i;
646 break;
647 }
648 }
649 }
650 else if (!strncmp(this_opt, "nohwcursor", 10)) {
651 printk("nohwcursor\n");
652 fb_info.nohwcursor = 1;
653 }
654 }
655
656 printk("au1100fb: Panel %d %s\n", my_lcd_index,
657 panels[my_lcd_index].panel_name);
658 }
659
660
661
662 #ifdef MODULE
663 MODULE_LICENSE("GPL");
664 int init_module(void)
665 {
666 return au1100fb_init();
667 }
668
669 void cleanup_module(void)
670 {
671 au1100fb_cleanup(void);
672 }
673
674 MODULE_AUTHOR("Pete Popov <ppopov@mvista.com>");
675 MODULE_DESCRIPTION("Au1100 LCD framebuffer device driver");
676 #endif /* MODULE */
677
|
This page was automatically generated by the
LXR engine.
|