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SUNRPC: Provide functions for managing universal addresses
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / w100fb.c
blob2376f688ec8b69addc7c4f0439bd62e127d8482b
1 /*
2 * linux/drivers/video/w100fb.c
3 *
4 * Frame Buffer Device for ATI Imageon w100 (Wallaby)
5 *
6 * Copyright (C) 2002, ATI Corp.
7 * Copyright (C) 2004-2006 Richard Purdie
8 * Copyright (c) 2005 Ian Molton
9 * Copyright (c) 2006 Alberto Mardegan
10 *
11 * Rewritten for 2.6 by Richard Purdie <rpurdie@rpsys.net>
12 *
13 * Generic platform support by Ian Molton <spyro@f2s.com>
14 * and Richard Purdie <rpurdie@rpsys.net>
15 *
16 * w32xx support by Ian Molton
17 *
18 * Hardware acceleration support by Alberto Mardegan
19 * <mardy@users.sourceforge.net>
20 *
21 * This program is free software; you can redistribute it and/or modify
22 * it under the terms of the GNU General Public License version 2 as
23 * published by the Free Software Foundation.
24 *
25 */
26
27 #include <linux/delay.h>
28 #include <linux/fb.h>
29 #include <linux/init.h>
30 #include <linux/kernel.h>
31 #include <linux/mm.h>
32 #include <linux/platform_device.h>
33 #include <linux/string.h>
34 #include <linux/vmalloc.h>
35 #include <asm/io.h>
36 #include <asm/uaccess.h>
37 #include <video/w100fb.h>
38 #include "w100fb.h"
39
40 /*
41 * Prototypes
42 */
43 static void w100_suspend(u32 mode);
44 static void w100_vsync(void);
45 static void w100_hw_init(struct w100fb_par*);
46 static void w100_pwm_setup(struct w100fb_par*);
47 static void w100_init_clocks(struct w100fb_par*);
48 static void w100_setup_memory(struct w100fb_par*);
49 static void w100_init_lcd(struct w100fb_par*);
50 static void w100_set_dispregs(struct w100fb_par*);
51 static void w100_update_enable(void);
52 static void w100_update_disable(void);
53 static void calc_hsync(struct w100fb_par *par);
54 static void w100_init_graphic_engine(struct w100fb_par *par);
55 struct w100_pll_info *w100_get_xtal_table(unsigned int freq);
56
57 /* Pseudo palette size */
58 #define MAX_PALETTES 16
59
60 #define W100_SUSPEND_EXTMEM 0
61 #define W100_SUSPEND_ALL 1
62
63 #define BITS_PER_PIXEL 16
64
65 /* Remapped addresses for base cfg, memmapped regs and the frame buffer itself */
66 static void *remapped_base;
67 static void *remapped_regs;
68 static void *remapped_fbuf;
69
70 #define REMAPPED_FB_LEN 0x15ffff
71
72 /* This is the offset in the w100's address space we map the current
73 framebuffer memory to. We use the position of external memory as
74 we can remap internal memory to there if external isn't present. */
75 #define W100_FB_BASE MEM_EXT_BASE_VALUE
76
77
78 /*
79 * Sysfs functions
80 */
81 static ssize_t flip_show(struct device *dev, struct device_attribute *attr, char *buf)
82 {
83 struct fb_info *info = dev_get_drvdata(dev);
84 struct w100fb_par *par=info->par;
85
86 return sprintf(buf, "%d\n",par->flip);
87 }
88
89 static ssize_t flip_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
90 {
91 unsigned int flip;
92 struct fb_info *info = dev_get_drvdata(dev);
93 struct w100fb_par *par=info->par;
94
95 flip = simple_strtoul(buf, NULL, 10);
96
97 if (flip > 0)
98 par->flip = 1;
99 else
100 par->flip = 0;
101
102 w100_update_disable();
103 w100_set_dispregs(par);
104 w100_update_enable();
105
106 calc_hsync(par);
107
108 return count;
109 }
110
111 static DEVICE_ATTR(flip, 0644, flip_show, flip_store);
112
113 static ssize_t w100fb_reg_read(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
114 {
115 unsigned long regs, param;
116 regs = simple_strtoul(buf, NULL, 16);
117 param = readl(remapped_regs + regs);
118 printk("Read Register 0x%08lX: 0x%08lX\n", regs, param);
119 return count;
120 }
121
122 static DEVICE_ATTR(reg_read, 0200, NULL, w100fb_reg_read);
123
124 static ssize_t w100fb_reg_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
125 {
126 unsigned long regs, param;
127 sscanf(buf, "%lx %lx", &regs, &param);
128
129 if (regs <= 0x2000) {
130 printk("Write Register 0x%08lX: 0x%08lX\n", regs, param);
131 writel(param, remapped_regs + regs);
132 }
133
134 return count;
135 }
136
137 static DEVICE_ATTR(reg_write, 0200, NULL, w100fb_reg_write);
138
139
140 static ssize_t fastpllclk_show(struct device *dev, struct device_attribute *attr, char *buf)
141 {
142 struct fb_info *info = dev_get_drvdata(dev);
143 struct w100fb_par *par=info->par;
144
145 return sprintf(buf, "%d\n",par->fastpll_mode);
146 }
147
148 static ssize_t fastpllclk_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
149 {
150 struct fb_info *info = dev_get_drvdata(dev);
151 struct w100fb_par *par=info->par;
152
153 if (simple_strtoul(buf, NULL, 10) > 0) {
154 par->fastpll_mode=1;
155 printk("w100fb: Using fast system clock (if possible)\n");
156 } else {
157 par->fastpll_mode=0;
158 printk("w100fb: Using normal system clock\n");
159 }
160
161 w100_init_clocks(par);
162 calc_hsync(par);
163
164 return count;
165 }
166
167 static DEVICE_ATTR(fastpllclk, 0644, fastpllclk_show, fastpllclk_store);
168
169 /*
170 * Some touchscreens need hsync information from the video driver to
171 * function correctly. We export it here.
172 */
173 unsigned long w100fb_get_hsynclen(struct device *dev)
174 {
175 struct fb_info *info = dev_get_drvdata(dev);
176 struct w100fb_par *par=info->par;
177
178 /* If display is blanked/suspended, hsync isn't active */
179 if (par->blanked)
180 return 0;
181 else
182 return par->hsync_len;
183 }
184 EXPORT_SYMBOL(w100fb_get_hsynclen);
185
186 static void w100fb_clear_screen(struct w100fb_par *par)
187 {
188 memset_io(remapped_fbuf + (W100_FB_BASE-MEM_WINDOW_BASE), 0, (par->xres * par->yres * BITS_PER_PIXEL/8));
189 }
190
191
192 /*
193 * Set a palette value from rgb components
194 */
195 static int w100fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
196 u_int trans, struct fb_info *info)
197 {
198 unsigned int val;
199 int ret = 1;
200
201 /*
202 * If greyscale is true, then we convert the RGB value
203 * to greyscale no matter what visual we are using.
204 */
205 if (info->var.grayscale)
206 red = green = blue = (19595 * red + 38470 * green + 7471 * blue) >> 16;
207
208 /*
209 * 16-bit True Colour. We encode the RGB value
210 * according to the RGB bitfield information.
211 */
212 if (regno < MAX_PALETTES) {
213 u32 *pal = info->pseudo_palette;
214
215 val = (red & 0xf800) | ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
216 pal[regno] = val;
217 ret = 0;
218 }
219 return ret;
220 }
221
222
223 /*
224 * Blank the display based on value in blank_mode
225 */
226 static int w100fb_blank(int blank_mode, struct fb_info *info)
227 {
228 struct w100fb_par *par = info->par;
229 struct w100_tg_info *tg = par->mach->tg;
230
231 switch(blank_mode) {
232
233 case FB_BLANK_NORMAL: /* Normal blanking */
234 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
235 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
236 case FB_BLANK_POWERDOWN: /* Poweroff */
237 if (par->blanked == 0) {
238 if(tg && tg->suspend)
239 tg->suspend(par);
240 par->blanked = 1;
241 }
242 break;
243
244 case FB_BLANK_UNBLANK: /* Unblanking */
245 if (par->blanked != 0) {
246 if(tg && tg->resume)
247 tg->resume(par);
248 par->blanked = 0;
249 }
250 break;
251 }
252 return 0;
253 }
254
255
256 static void w100_fifo_wait(int entries)
257 {
258 union rbbm_status_u status;
259 int i;
260
261 for (i = 0; i < 2000000; i++) {
262 status.val = readl(remapped_regs + mmRBBM_STATUS);
263 if (status.f.cmdfifo_avail >= entries)
264 return;
265 udelay(1);
266 }
267 printk(KERN_ERR "w100fb: FIFO Timeout!\n");
268 }
269
270
271 static int w100fb_sync(struct fb_info *info)
272 {
273 union rbbm_status_u status;
274 int i;
275
276 for (i = 0; i < 2000000; i++) {
277 status.val = readl(remapped_regs + mmRBBM_STATUS);
278 if (!status.f.gui_active)
279 return 0;
280 udelay(1);
281 }
282 printk(KERN_ERR "w100fb: Graphic engine timeout!\n");
283 return -EBUSY;
284 }
285
286
287 static void w100_init_graphic_engine(struct w100fb_par *par)
288 {
289 union dp_gui_master_cntl_u gmc;
290 union dp_mix_u dp_mix;
291 union dp_datatype_u dp_datatype;
292 union dp_cntl_u dp_cntl;
293
294 w100_fifo_wait(4);
295 writel(W100_FB_BASE, remapped_regs + mmDST_OFFSET);
296 writel(par->xres, remapped_regs + mmDST_PITCH);
297 writel(W100_FB_BASE, remapped_regs + mmSRC_OFFSET);
298 writel(par->xres, remapped_regs + mmSRC_PITCH);
299
300 w100_fifo_wait(3);
301 writel(0, remapped_regs + mmSC_TOP_LEFT);
302 writel((par->yres << 16) | par->xres, remapped_regs + mmSC_BOTTOM_RIGHT);
303 writel(0x1fff1fff, remapped_regs + mmSRC_SC_BOTTOM_RIGHT);
304
305 w100_fifo_wait(4);
306 dp_cntl.val = 0;
307 dp_cntl.f.dst_x_dir = 1;
308 dp_cntl.f.dst_y_dir = 1;
309 dp_cntl.f.src_x_dir = 1;
310 dp_cntl.f.src_y_dir = 1;
311 dp_cntl.f.dst_major_x = 1;
312 dp_cntl.f.src_major_x = 1;
313 writel(dp_cntl.val, remapped_regs + mmDP_CNTL);
314
315 gmc.val = 0;
316 gmc.f.gmc_src_pitch_offset_cntl = 1;
317 gmc.f.gmc_dst_pitch_offset_cntl = 1;
318 gmc.f.gmc_src_clipping = 1;
319 gmc.f.gmc_dst_clipping = 1;
320 gmc.f.gmc_brush_datatype = GMC_BRUSH_NONE;
321 gmc.f.gmc_dst_datatype = 3; /* from DstType_16Bpp_444 */
322 gmc.f.gmc_src_datatype = SRC_DATATYPE_EQU_DST;
323 gmc.f.gmc_byte_pix_order = 1;
324 gmc.f.gmc_default_sel = 0;
325 gmc.f.gmc_rop3 = ROP3_SRCCOPY;
326 gmc.f.gmc_dp_src_source = DP_SRC_MEM_RECTANGULAR;
327 gmc.f.gmc_clr_cmp_fcn_dis = 1;
328 gmc.f.gmc_wr_msk_dis = 1;
329 gmc.f.gmc_dp_op = DP_OP_ROP;
330 writel(gmc.val, remapped_regs + mmDP_GUI_MASTER_CNTL);
331
332 dp_datatype.val = dp_mix.val = 0;
333 dp_datatype.f.dp_dst_datatype = gmc.f.gmc_dst_datatype;
334 dp_datatype.f.dp_brush_datatype = gmc.f.gmc_brush_datatype;
335 dp_datatype.f.dp_src2_type = 0;
336 dp_datatype.f.dp_src2_datatype = gmc.f.gmc_src_datatype;
337 dp_datatype.f.dp_src_datatype = gmc.f.gmc_src_datatype;
338 dp_datatype.f.dp_byte_pix_order = gmc.f.gmc_byte_pix_order;
339 writel(dp_datatype.val, remapped_regs + mmDP_DATATYPE);
340
341 dp_mix.f.dp_src_source = gmc.f.gmc_dp_src_source;
342 dp_mix.f.dp_src2_source = 1;
343 dp_mix.f.dp_rop3 = gmc.f.gmc_rop3;
344 dp_mix.f.dp_op = gmc.f.gmc_dp_op;
345 writel(dp_mix.val, remapped_regs + mmDP_MIX);
346 }
347
348
349 static void w100fb_fillrect(struct fb_info *info,
350 const struct fb_fillrect *rect)
351 {
352 union dp_gui_master_cntl_u gmc;
353
354 if (info->state != FBINFO_STATE_RUNNING)
355 return;
356 if (info->flags & FBINFO_HWACCEL_DISABLED) {
357 cfb_fillrect(info, rect);
358 return;
359 }
360
361 gmc.val = readl(remapped_regs + mmDP_GUI_MASTER_CNTL);
362 gmc.f.gmc_rop3 = ROP3_PATCOPY;
363 gmc.f.gmc_brush_datatype = GMC_BRUSH_SOLID_COLOR;
364 w100_fifo_wait(2);
365 writel(gmc.val, remapped_regs + mmDP_GUI_MASTER_CNTL);
366 writel(rect->color, remapped_regs + mmDP_BRUSH_FRGD_CLR);
367
368 w100_fifo_wait(2);
369 writel((rect->dy << 16) | (rect->dx & 0xffff), remapped_regs + mmDST_Y_X);
370 writel((rect->width << 16) | (rect->height & 0xffff),
371 remapped_regs + mmDST_WIDTH_HEIGHT);
372 }
373
374
375 static void w100fb_copyarea(struct fb_info *info,
376 const struct fb_copyarea *area)
377 {
378 u32 dx = area->dx, dy = area->dy, sx = area->sx, sy = area->sy;
379 u32 h = area->height, w = area->width;
380 union dp_gui_master_cntl_u gmc;
381
382 if (info->state != FBINFO_STATE_RUNNING)
383 return;
384 if (info->flags & FBINFO_HWACCEL_DISABLED) {
385 cfb_copyarea(info, area);
386 return;
387 }
388
389 gmc.val = readl(remapped_regs + mmDP_GUI_MASTER_CNTL);
390 gmc.f.gmc_rop3 = ROP3_SRCCOPY;
391 gmc.f.gmc_brush_datatype = GMC_BRUSH_NONE;
392 w100_fifo_wait(1);
393 writel(gmc.val, remapped_regs + mmDP_GUI_MASTER_CNTL);
394
395 w100_fifo_wait(3);
396 writel((sy << 16) | (sx & 0xffff), remapped_regs + mmSRC_Y_X);
397 writel((dy << 16) | (dx & 0xffff), remapped_regs + mmDST_Y_X);
398 writel((w << 16) | (h & 0xffff), remapped_regs + mmDST_WIDTH_HEIGHT);
399 }
400
401
402 /*
403 * Change the resolution by calling the appropriate hardware functions
404 */
405 static void w100fb_activate_var(struct w100fb_par *par)
406 {
407 struct w100_tg_info *tg = par->mach->tg;
408
409 w100_pwm_setup(par);
410 w100_setup_memory(par);
411 w100_init_clocks(par);
412 w100fb_clear_screen(par);
413 w100_vsync();
414
415 w100_update_disable();
416 w100_init_lcd(par);
417 w100_set_dispregs(par);
418 w100_update_enable();
419 w100_init_graphic_engine(par);
420
421 calc_hsync(par);
422
423 if (!par->blanked && tg && tg->change)
424 tg->change(par);
425 }
426
427
428 /* Select the smallest mode that allows the desired resolution to be
429 * displayed. If desired, the x and y parameters can be rounded up to
430 * match the selected mode.
431 */
432 static struct w100_mode *w100fb_get_mode(struct w100fb_par *par, unsigned int *x, unsigned int *y, int saveval)
433 {
434 struct w100_mode *mode = NULL;
435 struct w100_mode *modelist = par->mach->modelist;
436 unsigned int best_x = 0xffffffff, best_y = 0xffffffff;
437 unsigned int i;
438
439 for (i = 0 ; i < par->mach->num_modes ; i++) {
440 if (modelist[i].xres >= *x && modelist[i].yres >= *y &&
441 modelist[i].xres < best_x && modelist[i].yres < best_y) {
442 best_x = modelist[i].xres;
443 best_y = modelist[i].yres;
444 mode = &modelist[i];
445 } else if(modelist[i].xres >= *y && modelist[i].yres >= *x &&
446 modelist[i].xres < best_y && modelist[i].yres < best_x) {
447 best_x = modelist[i].yres;
448 best_y = modelist[i].xres;
449 mode = &modelist[i];
450 }
451 }
452
453 if (mode && saveval) {
454 *x = best_x;
455 *y = best_y;
456 }
457
458 return mode;
459 }
460
461
462 /*
463 * w100fb_check_var():
464 * Get the video params out of 'var'. If a value doesn't fit, round it up,
465 * if it's too big, return -EINVAL.
466 */
467 static int w100fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
468 {
469 struct w100fb_par *par=info->par;
470
471 if(!w100fb_get_mode(par, &var->xres, &var->yres, 1))
472 return -EINVAL;
473
474 if (par->mach->mem && ((var->xres*var->yres*BITS_PER_PIXEL/8) > (par->mach->mem->size+1)))
475 return -EINVAL;
476
477 if (!par->mach->mem && ((var->xres*var->yres*BITS_PER_PIXEL/8) > (MEM_INT_SIZE+1)))
478 return -EINVAL;
479
480 var->xres_virtual = max(var->xres_virtual, var->xres);
481 var->yres_virtual = max(var->yres_virtual, var->yres);
482
483 if (var->bits_per_pixel > BITS_PER_PIXEL)
484 return -EINVAL;
485 else
486 var->bits_per_pixel = BITS_PER_PIXEL;
487
488 var->red.offset = 11;
489 var->red.length = 5;
490 var->green.offset = 5;
491 var->green.length = 6;
492 var->blue.offset = 0;
493 var->blue.length = 5;
494 var->transp.offset = var->transp.length = 0;
495
496 var->nonstd = 0;
497 var->height = -1;
498 var->width = -1;
499 var->vmode = FB_VMODE_NONINTERLACED;
500 var->sync = 0;
501 var->pixclock = 0x04; /* 171521; */
502
503 return 0;
504 }
505
506
507 /*
508 * w100fb_set_par():
509 * Set the user defined part of the display for the specified console
510 * by looking at the values in info.var
511 */
512 static int w100fb_set_par(struct fb_info *info)
513 {
514 struct w100fb_par *par=info->par;
515
516 if (par->xres != info->var.xres || par->yres != info->var.yres) {
517 par->xres = info->var.xres;
518 par->yres = info->var.yres;
519 par->mode = w100fb_get_mode(par, &par->xres, &par->yres, 0);
520
521 info->fix.visual = FB_VISUAL_TRUECOLOR;
522 info->fix.ypanstep = 0;
523 info->fix.ywrapstep = 0;
524 info->fix.line_length = par->xres * BITS_PER_PIXEL / 8;
525
526 mutex_lock(&info->mm_lock);
527 if ((par->xres*par->yres*BITS_PER_PIXEL/8) > (MEM_INT_SIZE+1)) {
528 par->extmem_active = 1;
529 info->fix.smem_len = par->mach->mem->size+1;
530 } else {
531 par->extmem_active = 0;
532 info->fix.smem_len = MEM_INT_SIZE+1;
533 }
534 mutex_unlock(&info->mm_lock);
535
536 w100fb_activate_var(par);
537 }
538 return 0;
539 }
540
541
542 /*
543 * Frame buffer operations
544 */
545 static struct fb_ops w100fb_ops = {
546 .owner = THIS_MODULE,
547 .fb_check_var = w100fb_check_var,
548 .fb_set_par = w100fb_set_par,
549 .fb_setcolreg = w100fb_setcolreg,
550 .fb_blank = w100fb_blank,
551 .fb_fillrect = w100fb_fillrect,
552 .fb_copyarea = w100fb_copyarea,
553 .fb_imageblit = cfb_imageblit,
554 .fb_sync = w100fb_sync,
555 };
556
557 #ifdef CONFIG_PM
558 static void w100fb_save_vidmem(struct w100fb_par *par)
559 {
560 int memsize;
561
562 if (par->extmem_active) {
563 memsize=par->mach->mem->size;
564 par->saved_extmem = vmalloc(memsize);
565 if (par->saved_extmem)
566 memcpy_fromio(par->saved_extmem, remapped_fbuf + (W100_FB_BASE-MEM_WINDOW_BASE), memsize);
567 }
568 memsize=MEM_INT_SIZE;
569 par->saved_intmem = vmalloc(memsize);
570 if (par->saved_intmem && par->extmem_active)
571 memcpy_fromio(par->saved_intmem, remapped_fbuf + (W100_FB_BASE-MEM_INT_BASE_VALUE), memsize);
572 else if (par->saved_intmem)
573 memcpy_fromio(par->saved_intmem, remapped_fbuf + (W100_FB_BASE-MEM_WINDOW_BASE), memsize);
574 }
575
576 static void w100fb_restore_vidmem(struct w100fb_par *par)
577 {
578 int memsize;
579
580 if (par->extmem_active && par->saved_extmem) {
581 memsize=par->mach->mem->size;
582 memcpy_toio(remapped_fbuf + (W100_FB_BASE-MEM_WINDOW_BASE), par->saved_extmem, memsize);
583 vfree(par->saved_extmem);
584 }
585 if (par->saved_intmem) {
586 memsize=MEM_INT_SIZE;
587 if (par->extmem_active)
588 memcpy_toio(remapped_fbuf + (W100_FB_BASE-MEM_INT_BASE_VALUE), par->saved_intmem, memsize);
589 else
590 memcpy_toio(remapped_fbuf + (W100_FB_BASE-MEM_WINDOW_BASE), par->saved_intmem, memsize);
591 vfree(par->saved_intmem);
592 }
593 }
594
595 static int w100fb_suspend(struct platform_device *dev, pm_message_t state)
596 {
597 struct fb_info *info = platform_get_drvdata(dev);
598 struct w100fb_par *par=info->par;
599 struct w100_tg_info *tg = par->mach->tg;
600
601 w100fb_save_vidmem(par);
602 if(tg && tg->suspend)
603 tg->suspend(par);
604 w100_suspend(W100_SUSPEND_ALL);
605 par->blanked = 1;
606
607 return 0;
608 }
609
610 static int w100fb_resume(struct platform_device *dev)
611 {
612 struct fb_info *info = platform_get_drvdata(dev);
613 struct w100fb_par *par=info->par;
614 struct w100_tg_info *tg = par->mach->tg;
615
616 w100_hw_init(par);
617 w100fb_activate_var(par);
618 w100fb_restore_vidmem(par);
619 if(tg && tg->resume)
620 tg->resume(par);
621 par->blanked = 0;
622
623 return 0;
624 }
625 #else
626 #define w100fb_suspend NULL
627 #define w100fb_resume NULL
628 #endif
629
630
631 int __init w100fb_probe(struct platform_device *pdev)
632 {
633 int err = -EIO;
634 struct w100fb_mach_info *inf;
635 struct fb_info *info = NULL;
636 struct w100fb_par *par;
637 struct resource *mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
638 unsigned int chip_id;
639
640 if (!mem)
641 return -EINVAL;
642
643 /* Remap the chip base address */
644 remapped_base = ioremap_nocache(mem->start+W100_CFG_BASE, W100_CFG_LEN);
645 if (remapped_base == NULL)
646 goto out;
647
648 /* Map the register space */
649 remapped_regs = ioremap_nocache(mem->start+W100_REG_BASE, W100_REG_LEN);
650 if (remapped_regs == NULL)
651 goto out;
652
653 /* Identify the chip */
654 printk("Found ");
655 chip_id = readl(remapped_regs + mmCHIP_ID);
656 switch(chip_id) {
657 case CHIP_ID_W100: printk("w100"); break;
658 case CHIP_ID_W3200: printk("w3200"); break;
659 case CHIP_ID_W3220: printk("w3220"); break;
660 default:
661 printk("Unknown imageon chip ID\n");
662 err = -ENODEV;
663 goto out;
664 }
665 printk(" at 0x%08lx.\n", (unsigned long) mem->start+W100_CFG_BASE);
666
667 /* Remap the framebuffer */
668 remapped_fbuf = ioremap_nocache(mem->start+MEM_WINDOW_BASE, MEM_WINDOW_SIZE);
669 if (remapped_fbuf == NULL)
670 goto out;
671
672 info=framebuffer_alloc(sizeof(struct w100fb_par), &pdev->dev);
673 if (!info) {
674 err = -ENOMEM;
675 goto out;
676 }
677
678 par = info->par;
679 platform_set_drvdata(pdev, info);
680
681 inf = pdev->dev.platform_data;
682 par->chip_id = chip_id;
683 par->mach = inf;
684 par->fastpll_mode = 0;
685 par->blanked = 0;
686
687 par->pll_table=w100_get_xtal_table(inf->xtal_freq);
688 if (!par->pll_table) {
689 printk(KERN_ERR "No matching Xtal definition found\n");
690 err = -EINVAL;
691 goto out;
692 }
693
694 info->pseudo_palette = kmalloc(sizeof (u32) * MAX_PALETTES, GFP_KERNEL);
695 if (!info->pseudo_palette) {
696 err = -ENOMEM;
697 goto out;
698 }
699
700 info->fbops = &w100fb_ops;
701 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
702 FBINFO_HWACCEL_FILLRECT;
703 info->node = -1;
704 info->screen_base = remapped_fbuf + (W100_FB_BASE-MEM_WINDOW_BASE);
705 info->screen_size = REMAPPED_FB_LEN;
706
707 strcpy(info->fix.id, "w100fb");
708 info->fix.type = FB_TYPE_PACKED_PIXELS;
709 info->fix.type_aux = 0;
710 info->fix.accel = FB_ACCEL_NONE;
711 info->fix.smem_start = mem->start+W100_FB_BASE;
712 info->fix.mmio_start = mem->start+W100_REG_BASE;
713 info->fix.mmio_len = W100_REG_LEN;
714
715 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
716 err = -ENOMEM;
717 goto out;
718 }
719
720 par->mode = &inf->modelist[0];
721 if(inf->init_mode & INIT_MODE_ROTATED) {
722 info->var.xres = par->mode->yres;
723 info->var.yres = par->mode->xres;
724 }
725 else {
726 info->var.xres = par->mode->xres;
727 info->var.yres = par->mode->yres;
728 }
729
730 if(inf->init_mode &= INIT_MODE_FLIPPED)
731 par->flip = 1;
732 else
733 par->flip = 0;
734
735 info->var.xres_virtual = info->var.xres;
736 info->var.yres_virtual = info->var.yres;
737 info->var.pixclock = 0x04; /* 171521; */
738 info->var.sync = 0;
739 info->var.grayscale = 0;
740 info->var.xoffset = info->var.yoffset = 0;
741 info->var.accel_flags = 0;
742 info->var.activate = FB_ACTIVATE_NOW;
743
744 w100_hw_init(par);
745
746 if (w100fb_check_var(&info->var, info) < 0) {
747 err = -EINVAL;
748 goto out;
749 }
750
751 if (register_framebuffer(info) < 0) {
752 err = -EINVAL;
753 goto out;
754 }
755
756 err = device_create_file(&pdev->dev, &dev_attr_fastpllclk);
757 err |= device_create_file(&pdev->dev, &dev_attr_reg_read);
758 err |= device_create_file(&pdev->dev, &dev_attr_reg_write);
759 err |= device_create_file(&pdev->dev, &dev_attr_flip);
760
761 if (err != 0)
762 printk(KERN_WARNING "fb%d: failed to register attributes (%d)\n",
763 info->node, err);
764
765 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, info->fix.id);
766 return 0;
767 out:
768 if (info) {
769 fb_dealloc_cmap(&info->cmap);
770 kfree(info->pseudo_palette);
771 }
772 if (remapped_fbuf != NULL)
773 iounmap(remapped_fbuf);
774 if (remapped_regs != NULL)
775 iounmap(remapped_regs);
776 if (remapped_base != NULL)
777 iounmap(remapped_base);
778 if (info)
779 framebuffer_release(info);
780 return err;
781 }
782
783
784 static int w100fb_remove(struct platform_device *pdev)
785 {
786 struct fb_info *info = platform_get_drvdata(pdev);
787 struct w100fb_par *par=info->par;
788
789 device_remove_file(&pdev->dev, &dev_attr_fastpllclk);
790 device_remove_file(&pdev->dev, &dev_attr_reg_read);
791 device_remove_file(&pdev->dev, &dev_attr_reg_write);
792 device_remove_file(&pdev->dev, &dev_attr_flip);
793
794 unregister_framebuffer(info);
795
796 vfree(par->saved_intmem);
797 vfree(par->saved_extmem);
798 kfree(info->pseudo_palette);
799 fb_dealloc_cmap(&info->cmap);
800
801 iounmap(remapped_base);
802 iounmap(remapped_regs);
803 iounmap(remapped_fbuf);
804
805 framebuffer_release(info);
806
807 return 0;
808 }
809
810
811 /* ------------------- chipset specific functions -------------------------- */
812
813
814 static void w100_soft_reset(void)
815 {
816 u16 val = readw((u16 *) remapped_base + cfgSTATUS);
817 writew(val | 0x08, (u16 *) remapped_base + cfgSTATUS);
818 udelay(100);
819 writew(0x00, (u16 *) remapped_base + cfgSTATUS);
820 udelay(100);
821 }
822
823 static void w100_update_disable(void)
824 {
825 union disp_db_buf_cntl_wr_u disp_db_buf_wr_cntl;
826
827 /* Prevent display updates */
828 disp_db_buf_wr_cntl.f.db_buf_cntl = 0x1e;
829 disp_db_buf_wr_cntl.f.update_db_buf = 0;
830 disp_db_buf_wr_cntl.f.en_db_buf = 0;
831 writel((u32) (disp_db_buf_wr_cntl.val), remapped_regs + mmDISP_DB_BUF_CNTL);
832 }
833
834 static void w100_update_enable(void)
835 {
836 union disp_db_buf_cntl_wr_u disp_db_buf_wr_cntl;
837
838 /* Enable display updates */
839 disp_db_buf_wr_cntl.f.db_buf_cntl = 0x1e;
840 disp_db_buf_wr_cntl.f.update_db_buf = 1;
841 disp_db_buf_wr_cntl.f.en_db_buf = 1;
842 writel((u32) (disp_db_buf_wr_cntl.val), remapped_regs + mmDISP_DB_BUF_CNTL);
843 }
844
845 unsigned long w100fb_gpio_read(int port)
846 {
847 unsigned long value;
848
849 if (port==W100_GPIO_PORT_A)
850 value = readl(remapped_regs + mmGPIO_DATA);
851 else
852 value = readl(remapped_regs + mmGPIO_DATA2);
853
854 return value;
855 }
856
857 void w100fb_gpio_write(int port, unsigned long value)
858 {
859 if (port==W100_GPIO_PORT_A)
860 value = writel(value, remapped_regs + mmGPIO_DATA);
861 else
862 value = writel(value, remapped_regs + mmGPIO_DATA2);
863 }
864 EXPORT_SYMBOL(w100fb_gpio_read);
865 EXPORT_SYMBOL(w100fb_gpio_write);
866
867 /*
868 * Initialization of critical w100 hardware
869 */
870 static void w100_hw_init(struct w100fb_par *par)
871 {
872 u32 temp32;
873 union cif_cntl_u cif_cntl;
874 union intf_cntl_u intf_cntl;
875 union cfgreg_base_u cfgreg_base;
876 union wrap_top_dir_u wrap_top_dir;
877 union cif_read_dbg_u cif_read_dbg;
878 union cpu_defaults_u cpu_default;
879 union cif_write_dbg_u cif_write_dbg;
880 union wrap_start_dir_u wrap_start_dir;
881 union cif_io_u cif_io;
882 struct w100_gpio_regs *gpio = par->mach->gpio;
883
884 w100_soft_reset();
885
886 /* This is what the fpga_init code does on reset. May be wrong
887 but there is little info available */
888 writel(0x31, remapped_regs + mmSCRATCH_UMSK);
889 for (temp32 = 0; temp32 < 10000; temp32++)
890 readl(remapped_regs + mmSCRATCH_UMSK);
891 writel(0x30, remapped_regs + mmSCRATCH_UMSK);
892
893 /* Set up CIF */
894 cif_io.val = defCIF_IO;
895 writel((u32)(cif_io.val), remapped_regs + mmCIF_IO);
896
897 cif_write_dbg.val = readl(remapped_regs + mmCIF_WRITE_DBG);
898 cif_write_dbg.f.dis_packer_ful_during_rbbm_timeout = 0;
899 cif_write_dbg.f.en_dword_split_to_rbbm = 1;
900 cif_write_dbg.f.dis_timeout_during_rbbm = 1;
901 writel((u32) (cif_write_dbg.val), remapped_regs + mmCIF_WRITE_DBG);
902
903 cif_read_dbg.val = readl(remapped_regs + mmCIF_READ_DBG);
904 cif_read_dbg.f.dis_rd_same_byte_to_trig_fetch = 1;
905 writel((u32) (cif_read_dbg.val), remapped_regs + mmCIF_READ_DBG);
906
907 cif_cntl.val = readl(remapped_regs + mmCIF_CNTL);
908 cif_cntl.f.dis_system_bits = 1;
909 cif_cntl.f.dis_mr = 1;
910 cif_cntl.f.en_wait_to_compensate_dq_prop_dly = 0;
911 cif_cntl.f.intb_oe = 1;
912 cif_cntl.f.interrupt_active_high = 1;
913 writel((u32) (cif_cntl.val), remapped_regs + mmCIF_CNTL);
914
915 /* Setup cfgINTF_CNTL and cfgCPU defaults */
916 intf_cntl.val = defINTF_CNTL;
917 intf_cntl.f.ad_inc_a = 1;
918 intf_cntl.f.ad_inc_b = 1;
919 intf_cntl.f.rd_data_rdy_a = 0;
920 intf_cntl.f.rd_data_rdy_b = 0;
921 writeb((u8) (intf_cntl.val), remapped_base + cfgINTF_CNTL);
922
923 cpu_default.val = defCPU_DEFAULTS;
924 cpu_default.f.access_ind_addr_a = 1;
925 cpu_default.f.access_ind_addr_b = 1;
926 cpu_default.f.access_scratch_reg = 1;
927 cpu_default.f.transition_size = 0;
928 writeb((u8) (cpu_default.val), remapped_base + cfgCPU_DEFAULTS);
929
930 /* set up the apertures */
931 writeb((u8) (W100_REG_BASE >> 16), remapped_base + cfgREG_BASE);
932
933 cfgreg_base.val = defCFGREG_BASE;
934 cfgreg_base.f.cfgreg_base = W100_CFG_BASE;
935 writel((u32) (cfgreg_base.val), remapped_regs + mmCFGREG_BASE);
936
937 wrap_start_dir.val = defWRAP_START_DIR;
938 wrap_start_dir.f.start_addr = WRAP_BUF_BASE_VALUE >> 1;
939 writel((u32) (wrap_start_dir.val), remapped_regs + mmWRAP_START_DIR);
940
941 wrap_top_dir.val = defWRAP_TOP_DIR;
942 wrap_top_dir.f.top_addr = WRAP_BUF_TOP_VALUE >> 1;
943 writel((u32) (wrap_top_dir.val), remapped_regs + mmWRAP_TOP_DIR);
944
945 writel((u32) 0x2440, remapped_regs + mmRBBM_CNTL);
946
947 /* Set the hardware to 565 colour */
948 temp32 = readl(remapped_regs + mmDISP_DEBUG2);
949 temp32 &= 0xff7fffff;
950 temp32 |= 0x00800000;
951 writel(temp32, remapped_regs + mmDISP_DEBUG2);
952
953 /* Initialise the GPIO lines */
954 if (gpio) {
955 writel(gpio->init_data1, remapped_regs + mmGPIO_DATA);
956 writel(gpio->init_data2, remapped_regs + mmGPIO_DATA2);
957 writel(gpio->gpio_dir1, remapped_regs + mmGPIO_CNTL1);
958 writel(gpio->gpio_oe1, remapped_regs + mmGPIO_CNTL2);
959 writel(gpio->gpio_dir2, remapped_regs + mmGPIO_CNTL3);
960 writel(gpio->gpio_oe2, remapped_regs + mmGPIO_CNTL4);
961 }
962 }
963
964
965 struct power_state {
966 union clk_pin_cntl_u clk_pin_cntl;
967 union pll_ref_fb_div_u pll_ref_fb_div;
968 union pll_cntl_u pll_cntl;
969 union sclk_cntl_u sclk_cntl;
970 union pclk_cntl_u pclk_cntl;
971 union pwrmgt_cntl_u pwrmgt_cntl;
972 int auto_mode; /* system clock auto changing? */
973 };
974
975
976 static struct power_state w100_pwr_state;
977
978 /* The PLL Fout is determined by (XtalFreq/(M+1)) * ((N_int+1) + (N_fac/8)) */
979
980 /* 12.5MHz Crystal PLL Table */
981 static struct w100_pll_info xtal_12500000[] = {
982 /*freq M N_int N_fac tfgoal lock_time */
983 { 50, 0, 1, 0, 0xe0, 56}, /* 50.00 MHz */
984 { 75, 0, 5, 0, 0xde, 37}, /* 75.00 MHz */
985 {100, 0, 7, 0, 0xe0, 28}, /* 100.00 MHz */
986 {125, 0, 9, 0, 0xe0, 22}, /* 125.00 MHz */
987 {150, 0, 11, 0, 0xe0, 17}, /* 150.00 MHz */
988 { 0, 0, 0, 0, 0, 0}, /* Terminator */
989 };
990
991 /* 14.318MHz Crystal PLL Table */
992 static struct w100_pll_info xtal_14318000[] = {
993 /*freq M N_int N_fac tfgoal lock_time */
994 { 40, 4, 13, 0, 0xe0, 80}, /* tfgoal guessed */
995 { 50, 1, 6, 0, 0xe0, 64}, /* 50.05 MHz */
996 { 57, 2, 11, 0, 0xe0, 53}, /* tfgoal guessed */
997 { 75, 0, 4, 3, 0xe0, 43}, /* 75.08 MHz */
998 {100, 0, 6, 0, 0xe0, 32}, /* 100.10 MHz */
999 { 0, 0, 0, 0, 0, 0},
1000 };
1001
1002 /* 16MHz Crystal PLL Table */
1003 static struct w100_pll_info xtal_16000000[] = {
1004 /*freq M N_int N_fac tfgoal lock_time */
1005 { 72, 1, 8, 0, 0xe0, 48}, /* tfgoal guessed */
1006 { 80, 1, 9, 0, 0xe0, 13}, /* tfgoal guessed */
1007 { 95, 1, 10, 7, 0xe0, 38}, /* tfgoal guessed */
1008 { 96, 1, 11, 0, 0xe0, 36}, /* tfgoal guessed */
1009 { 0, 0, 0, 0, 0, 0},
1010 };
1011
1012 static struct pll_entries {
1013 int xtal_freq;
1014 struct w100_pll_info *pll_table;
1015 } w100_pll_tables[] = {
1016 { 12500000, &xtal_12500000[0] },
1017 { 14318000, &xtal_14318000[0] },
1018 { 16000000, &xtal_16000000[0] },
1019 { 0 },
1020 };
1021
1022 struct w100_pll_info *w100_get_xtal_table(unsigned int freq)
1023 {
1024 struct pll_entries *pll_entry = w100_pll_tables;
1025
1026 do {
1027 if (freq == pll_entry->xtal_freq)
1028 return pll_entry->pll_table;
1029 pll_entry++;
1030 } while (pll_entry->xtal_freq);
1031 return 0;
1032 }
1033
1034
1035 static unsigned int w100_get_testcount(unsigned int testclk_sel)
1036 {
1037 union clk_test_cntl_u clk_test_cntl;
1038
1039 udelay(5);
1040
1041 /* Select the test clock source and reset */
1042 clk_test_cntl.f.start_check_freq = 0x0;
1043 clk_test_cntl.f.testclk_sel = testclk_sel;
1044 clk_test_cntl.f.tstcount_rst = 0x1; /* set reset */
1045 writel((u32) (clk_test_cntl.val), remapped_regs + mmCLK_TEST_CNTL);
1046
1047 clk_test_cntl.f.tstcount_rst = 0x0; /* clear reset */
1048 writel((u32) (clk_test_cntl.val), remapped_regs + mmCLK_TEST_CNTL);
1049
1050 /* Run clock test */
1051 clk_test_cntl.f.start_check_freq = 0x1;
1052 writel((u32) (clk_test_cntl.val), remapped_regs + mmCLK_TEST_CNTL);
1053
1054 /* Give the test time to complete */
1055 udelay(20);
1056
1057 /* Return the result */
1058 clk_test_cntl.val = readl(remapped_regs + mmCLK_TEST_CNTL);
1059 clk_test_cntl.f.start_check_freq = 0x0;
1060 writel((u32) (clk_test_cntl.val), remapped_regs + mmCLK_TEST_CNTL);
1061
1062 return clk_test_cntl.f.test_count;
1063 }
1064
1065
1066 static int w100_pll_adjust(struct w100_pll_info *pll)
1067 {
1068 unsigned int tf80;
1069 unsigned int tf20;
1070
1071 /* Initial Settings */
1072 w100_pwr_state.pll_cntl.f.pll_pwdn = 0x0; /* power down */
1073 w100_pwr_state.pll_cntl.f.pll_reset = 0x0; /* not reset */
1074 w100_pwr_state.pll_cntl.f.pll_tcpoff = 0x1; /* Hi-Z */
1075 w100_pwr_state.pll_cntl.f.pll_pvg = 0x0; /* VCO gain = 0 */
1076 w100_pwr_state.pll_cntl.f.pll_vcofr = 0x0; /* VCO frequency range control = off */
1077 w100_pwr_state.pll_cntl.f.pll_ioffset = 0x0; /* current offset inside VCO = 0 */
1078 w100_pwr_state.pll_cntl.f.pll_ring_off = 0x0;
1079
1080 /* Wai Ming 80 percent of VDD 1.3V gives 1.04V, minimum operating voltage is 1.08V
1081 * therefore, commented out the following lines
1082 * tf80 meant tf100
1083 */
1084 do {
1085 /* set VCO input = 0.8 * VDD */
1086 w100_pwr_state.pll_cntl.f.pll_dactal = 0xd;
1087 writel((u32) (w100_pwr_state.pll_cntl.val), remapped_regs + mmPLL_CNTL);
1088
1089 tf80 = w100_get_testcount(TESTCLK_SRC_PLL);
1090 if (tf80 >= (pll->tfgoal)) {
1091 /* set VCO input = 0.2 * VDD */
1092 w100_pwr_state.pll_cntl.f.pll_dactal = 0x7;
1093 writel((u32) (w100_pwr_state.pll_cntl.val), remapped_regs + mmPLL_CNTL);
1094
1095 tf20 = w100_get_testcount(TESTCLK_SRC_PLL);
1096 if (tf20 <= (pll->tfgoal))
1097 return 1; /* Success */
1098
1099 if ((w100_pwr_state.pll_cntl.f.pll_vcofr == 0x0) &&
1100 ((w100_pwr_state.pll_cntl.f.pll_pvg == 0x7) ||
1101 (w100_pwr_state.pll_cntl.f.pll_ioffset == 0x0))) {
1102 /* slow VCO config */
1103 w100_pwr_state.pll_cntl.f.pll_vcofr = 0x1;
1104 w100_pwr_state.pll_cntl.f.pll_pvg = 0x0;
1105 w100_pwr_state.pll_cntl.f.pll_ioffset = 0x0;
1106 continue;
1107 }
1108 }
1109 if ((w100_pwr_state.pll_cntl.f.pll_ioffset) < 0x3) {
1110 w100_pwr_state.pll_cntl.f.pll_ioffset += 0x1;
1111 } else if ((w100_pwr_state.pll_cntl.f.pll_pvg) < 0x7) {
1112 w100_pwr_state.pll_cntl.f.pll_ioffset = 0x0;
1113 w100_pwr_state.pll_cntl.f.pll_pvg += 0x1;
1114 } else {
1115 return 0; /* Error */
1116 }
1117 } while(1);
1118 }
1119
1120
1121 /*
1122 * w100_pll_calibration
1123 */
1124 static int w100_pll_calibration(struct w100_pll_info *pll)
1125 {
1126 int status;
1127
1128 status = w100_pll_adjust(pll);
1129
1130 /* PLL Reset And Lock */
1131 /* set VCO input = 0.5 * VDD */
1132 w100_pwr_state.pll_cntl.f.pll_dactal = 0xa;
1133 writel((u32) (w100_pwr_state.pll_cntl.val), remapped_regs + mmPLL_CNTL);
1134
1135 udelay(1); /* reset time */
1136
1137 /* enable charge pump */
1138 w100_pwr_state.pll_cntl.f.pll_tcpoff = 0x0; /* normal */
1139 writel((u32) (w100_pwr_state.pll_cntl.val), remapped_regs + mmPLL_CNTL);
1140
1141 /* set VCO input = Hi-Z, disable DAC */
1142 w100_pwr_state.pll_cntl.f.pll_dactal = 0x0;
1143 writel((u32) (w100_pwr_state.pll_cntl.val), remapped_regs + mmPLL_CNTL);
1144
1145 udelay(400); /* lock time */
1146
1147 /* PLL locked */
1148
1149 return status;
1150 }
1151
1152
1153 static int w100_pll_set_clk(struct w100_pll_info *pll)
1154 {
1155 int status;
1156
1157 if (w100_pwr_state.auto_mode == 1) /* auto mode */
1158 {
1159 w100_pwr_state.pwrmgt_cntl.f.pwm_fast_noml_hw_en = 0x0; /* disable fast to normal */
1160 w100_pwr_state.pwrmgt_cntl.f.pwm_noml_fast_hw_en = 0x0; /* disable normal to fast */
1161 writel((u32) (w100_pwr_state.pwrmgt_cntl.val), remapped_regs + mmPWRMGT_CNTL);
1162 }
1163
1164 /* Set system clock source to XTAL whilst adjusting the PLL! */
1165 w100_pwr_state.sclk_cntl.f.sclk_src_sel = CLK_SRC_XTAL;
1166 writel((u32) (w100_pwr_state.sclk_cntl.val), remapped_regs + mmSCLK_CNTL);
1167
1168 w100_pwr_state.pll_ref_fb_div.f.pll_ref_div = pll->M;
1169 w100_pwr_state.pll_ref_fb_div.f.pll_fb_div_int = pll->N_int;
1170 w100_pwr_state.pll_ref_fb_div.f.pll_fb_div_frac = pll->N_fac;
1171 w100_pwr_state.pll_ref_fb_div.f.pll_lock_time = pll->lock_time;
1172 writel((u32) (w100_pwr_state.pll_ref_fb_div.val), remapped_regs + mmPLL_REF_FB_DIV);
1173
1174 w100_pwr_state.pwrmgt_cntl.f.pwm_mode_req = 0;
1175 writel((u32) (w100_pwr_state.pwrmgt_cntl.val), remapped_regs + mmPWRMGT_CNTL);
1176
1177 status = w100_pll_calibration(pll);
1178
1179 if (w100_pwr_state.auto_mode == 1) /* auto mode */
1180 {
1181 w100_pwr_state.pwrmgt_cntl.f.pwm_fast_noml_hw_en = 0x1; /* reenable fast to normal */
1182 w100_pwr_state.pwrmgt_cntl.f.pwm_noml_fast_hw_en = 0x1; /* reenable normal to fast */
1183 writel((u32) (w100_pwr_state.pwrmgt_cntl.val), remapped_regs + mmPWRMGT_CNTL);
1184 }
1185 return status;
1186 }
1187
1188 /* freq = target frequency of the PLL */
1189 static int w100_set_pll_freq(struct w100fb_par *par, unsigned int freq)
1190 {
1191 struct w100_pll_info *pll = par->pll_table;
1192
1193 do {
1194 if (freq == pll->freq) {
1195 return w100_pll_set_clk(pll);
1196 }
1197 pll++;
1198 } while(pll->freq);
1199 return 0;
1200 }
1201
1202 /* Set up an initial state. Some values/fields set
1203 here will be overwritten. */
1204 static void w100_pwm_setup(struct w100fb_par *par)
1205 {
1206 w100_pwr_state.clk_pin_cntl.f.osc_en = 0x1;
1207 w100_pwr_state.clk_pin_cntl.f.osc_gain = 0x1f;
1208 w100_pwr_state.clk_pin_cntl.f.dont_use_xtalin = 0x0;
1209 w100_pwr_state.clk_pin_cntl.f.xtalin_pm_en = 0x0;
1210 w100_pwr_state.clk_pin_cntl.f.xtalin_dbl_en = par->mach->xtal_dbl ? 1 : 0;
1211 w100_pwr_state.clk_pin_cntl.f.cg_debug = 0x0;
1212 writel((u32) (w100_pwr_state.clk_pin_cntl.val), remapped_regs + mmCLK_PIN_CNTL);
1213
1214 w100_pwr_state.sclk_cntl.f.sclk_src_sel = CLK_SRC_XTAL;
1215 w100_pwr_state.sclk_cntl.f.sclk_post_div_fast = 0x0; /* Pfast = 1 */
1216 w100_pwr_state.sclk_cntl.f.sclk_clkon_hys = 0x3;
1217 w100_pwr_state.sclk_cntl.f.sclk_post_div_slow = 0x0; /* Pslow = 1 */
1218 w100_pwr_state.sclk_cntl.f.disp_cg_ok2switch_en = 0x0;
1219 w100_pwr_state.sclk_cntl.f.sclk_force_reg = 0x0; /* Dynamic */
1220 w100_pwr_state.sclk_cntl.f.sclk_force_disp = 0x0; /* Dynamic */
1221 w100_pwr_state.sclk_cntl.f.sclk_force_mc = 0x0; /* Dynamic */
1222 w100_pwr_state.sclk_cntl.f.sclk_force_extmc = 0x0; /* Dynamic */
1223 w100_pwr_state.sclk_cntl.f.sclk_force_cp = 0x0; /* Dynamic */
1224 w100_pwr_state.sclk_cntl.f.sclk_force_e2 = 0x0; /* Dynamic */
1225 w100_pwr_state.sclk_cntl.f.sclk_force_e3 = 0x0; /* Dynamic */
1226 w100_pwr_state.sclk_cntl.f.sclk_force_idct = 0x0; /* Dynamic */
1227 w100_pwr_state.sclk_cntl.f.sclk_force_bist = 0x0; /* Dynamic */
1228 w100_pwr_state.sclk_cntl.f.busy_extend_cp = 0x0;
1229 w100_pwr_state.sclk_cntl.f.busy_extend_e2 = 0x0;
1230 w100_pwr_state.sclk_cntl.f.busy_extend_e3 = 0x0;
1231 w100_pwr_state.sclk_cntl.f.busy_extend_idct = 0x0;
1232 writel((u32) (w100_pwr_state.sclk_cntl.val), remapped_regs + mmSCLK_CNTL);
1233
1234 w100_pwr_state.pclk_cntl.f.pclk_src_sel = CLK_SRC_XTAL;
1235 w100_pwr_state.pclk_cntl.f.pclk_post_div = 0x1; /* P = 2 */
1236 w100_pwr_state.pclk_cntl.f.pclk_force_disp = 0x0; /* Dynamic */
1237 writel((u32) (w100_pwr_state.pclk_cntl.val), remapped_regs + mmPCLK_CNTL);
1238
1239 w100_pwr_state.pll_ref_fb_div.f.pll_ref_div = 0x0; /* M = 1 */
1240 w100_pwr_state.pll_ref_fb_div.f.pll_fb_div_int = 0x0; /* N = 1.0 */
1241 w100_pwr_state.pll_ref_fb_div.f.pll_fb_div_frac = 0x0;
1242 w100_pwr_state.pll_ref_fb_div.f.pll_reset_time = 0x5;
1243 w100_pwr_state.pll_ref_fb_div.f.pll_lock_time = 0xff;
1244 writel((u32) (w100_pwr_state.pll_ref_fb_div.val), remapped_regs + mmPLL_REF_FB_DIV);
1245
1246 w100_pwr_state.pll_cntl.f.pll_pwdn = 0x1;
1247 w100_pwr_state.pll_cntl.f.pll_reset = 0x1;
1248 w100_pwr_state.pll_cntl.f.pll_pm_en = 0x0;
1249 w100_pwr_state.pll_cntl.f.pll_mode = 0x0; /* uses VCO clock */
1250 w100_pwr_state.pll_cntl.f.pll_refclk_sel = 0x0;
1251 w100_pwr_state.pll_cntl.f.pll_fbclk_sel = 0x0;
1252 w100_pwr_state.pll_cntl.f.pll_tcpoff = 0x0;
1253 w100_pwr_state.pll_cntl.f.pll_pcp = 0x4;
1254 w100_pwr_state.pll_cntl.f.pll_pvg = 0x0;
1255 w100_pwr_state.pll_cntl.f.pll_vcofr = 0x0;
1256 w100_pwr_state.pll_cntl.f.pll_ioffset = 0x0;
1257 w100_pwr_state.pll_cntl.f.pll_pecc_mode = 0x0;
1258 w100_pwr_state.pll_cntl.f.pll_pecc_scon = 0x0;
1259 w100_pwr_state.pll_cntl.f.pll_dactal = 0x0; /* Hi-Z */
1260 w100_pwr_state.pll_cntl.f.pll_cp_clip = 0x3;
1261 w100_pwr_state.pll_cntl.f.pll_conf = 0x2;
1262 w100_pwr_state.pll_cntl.f.pll_mbctrl = 0x2;
1263 w100_pwr_state.pll_cntl.f.pll_ring_off = 0x0;
1264 writel((u32) (w100_pwr_state.pll_cntl.val), remapped_regs + mmPLL_CNTL);
1265
1266 w100_pwr_state.pwrmgt_cntl.f.pwm_enable = 0x0;
1267 w100_pwr_state.pwrmgt_cntl.f.pwm_mode_req = 0x1; /* normal mode (0, 1, 3) */
1268 w100_pwr_state.pwrmgt_cntl.f.pwm_wakeup_cond = 0x0;
1269 w100_pwr_state.pwrmgt_cntl.f.pwm_fast_noml_hw_en = 0x0;
1270 w100_pwr_state.pwrmgt_cntl.f.pwm_noml_fast_hw_en = 0x0;
1271 w100_pwr_state.pwrmgt_cntl.f.pwm_fast_noml_cond = 0x1; /* PM4,ENG */
1272 w100_pwr_state.pwrmgt_cntl.f.pwm_noml_fast_cond = 0x1; /* PM4,ENG */
1273 w100_pwr_state.pwrmgt_cntl.f.pwm_idle_timer = 0xFF;
1274 w100_pwr_state.pwrmgt_cntl.f.pwm_busy_timer = 0xFF;
1275 writel((u32) (w100_pwr_state.pwrmgt_cntl.val), remapped_regs + mmPWRMGT_CNTL);
1276
1277 w100_pwr_state.auto_mode = 0; /* manual mode */
1278 }
1279
1280
1281 /*
1282 * Setup the w100 clocks for the specified mode
1283 */
1284 static void w100_init_clocks(struct w100fb_par *par)
1285 {
1286 struct w100_mode *mode = par->mode;
1287
1288 if (mode->pixclk_src == CLK_SRC_PLL || mode->sysclk_src == CLK_SRC_PLL)
1289 w100_set_pll_freq(par, (par->fastpll_mode && mode->fast_pll_freq) ? mode->fast_pll_freq : mode->pll_freq);
1290
1291 w100_pwr_state.sclk_cntl.f.sclk_src_sel = mode->sysclk_src;
1292 w100_pwr_state.sclk_cntl.f.sclk_post_div_fast = mode->sysclk_divider;
1293 w100_pwr_state.sclk_cntl.f.sclk_post_div_slow = mode->sysclk_divider;
1294 writel((u32) (w100_pwr_state.sclk_cntl.val), remapped_regs + mmSCLK_CNTL);
1295 }
1296
1297 static void w100_init_lcd(struct w100fb_par *par)
1298 {
1299 u32 temp32;
1300 struct w100_mode *mode = par->mode;
1301 struct w100_gen_regs *regs = par->mach->regs;
1302 union active_h_disp_u active_h_disp;
1303 union active_v_disp_u active_v_disp;
1304 union graphic_h_disp_u graphic_h_disp;
1305 union graphic_v_disp_u graphic_v_disp;
1306 union crtc_total_u crtc_total;
1307
1308 /* w3200 doesnt like undefined bits being set so zero register values first */
1309
1310 active_h_disp.val = 0;
1311 active_h_disp.f.active_h_start=mode->left_margin;
1312 active_h_disp.f.active_h_end=mode->left_margin + mode->xres;
1313 writel(active_h_disp.val, remapped_regs + mmACTIVE_H_DISP);
1314
1315 active_v_disp.val = 0;
1316 active_v_disp.f.active_v_start=mode->upper_margin;
1317 active_v_disp.f.active_v_end=mode->upper_margin + mode->yres;
1318 writel(active_v_disp.val, remapped_regs + mmACTIVE_V_DISP);
1319
1320 graphic_h_disp.val = 0;
1321 graphic_h_disp.f.graphic_h_start=mode->left_margin;
1322 graphic_h_disp.f.graphic_h_end=mode->left_margin + mode->xres;
1323 writel(graphic_h_disp.val, remapped_regs + mmGRAPHIC_H_DISP);
1324
1325 graphic_v_disp.val = 0;
1326 graphic_v_disp.f.graphic_v_start=mode->upper_margin;
1327 graphic_v_disp.f.graphic_v_end=mode->upper_margin + mode->yres;
1328 writel(graphic_v_disp.val, remapped_regs + mmGRAPHIC_V_DISP);
1329
1330 crtc_total.val = 0;
1331 crtc_total.f.crtc_h_total=mode->left_margin + mode->xres + mode->right_margin;
1332 crtc_total.f.crtc_v_total=mode->upper_margin + mode->yres + mode->lower_margin;
1333 writel(crtc_total.val, remapped_regs + mmCRTC_TOTAL);
1334
1335 writel(mode->crtc_ss, remapped_regs + mmCRTC_SS);
1336 writel(mode->crtc_ls, remapped_regs + mmCRTC_LS);
1337 writel(mode->crtc_gs, remapped_regs + mmCRTC_GS);
1338 writel(mode->crtc_vpos_gs, remapped_regs + mmCRTC_VPOS_GS);
1339 writel(mode->crtc_rev, remapped_regs + mmCRTC_REV);
1340 writel(mode->crtc_dclk, remapped_regs + mmCRTC_DCLK);
1341 writel(mode->crtc_gclk, remapped_regs + mmCRTC_GCLK);
1342 writel(mode->crtc_goe, remapped_regs + mmCRTC_GOE);
1343 writel(mode->crtc_ps1_active, remapped_regs + mmCRTC_PS1_ACTIVE);
1344
1345 writel(regs->lcd_format, remapped_regs + mmLCD_FORMAT);
1346 writel(regs->lcdd_cntl1, remapped_regs + mmLCDD_CNTL1);
1347 writel(regs->lcdd_cntl2, remapped_regs + mmLCDD_CNTL2);
1348 writel(regs->genlcd_cntl1, remapped_regs + mmGENLCD_CNTL1);
1349 writel(regs->genlcd_cntl2, remapped_regs + mmGENLCD_CNTL2);
1350 writel(regs->genlcd_cntl3, remapped_regs + mmGENLCD_CNTL3);
1351
1352 writel(0x00000000, remapped_regs + mmCRTC_FRAME);
1353 writel(0x00000000, remapped_regs + mmCRTC_FRAME_VPOS);
1354 writel(0x00000000, remapped_regs + mmCRTC_DEFAULT_COUNT);
1355 writel(0x0000FF00, remapped_regs + mmLCD_BACKGROUND_COLOR);
1356
1357 /* Hack for overlay in ext memory */
1358 temp32 = readl(remapped_regs + mmDISP_DEBUG2);
1359 temp32 |= 0xc0000000;
1360 writel(temp32, remapped_regs + mmDISP_DEBUG2);
1361 }
1362
1363
1364 static void w100_setup_memory(struct w100fb_par *par)
1365 {
1366 union mc_ext_mem_location_u extmem_location;
1367 union mc_fb_location_u intmem_location;
1368 struct w100_mem_info *mem = par->mach->mem;
1369 struct w100_bm_mem_info *bm_mem = par->mach->bm_mem;
1370
1371 if (!par->extmem_active) {
1372 w100_suspend(W100_SUSPEND_EXTMEM);
1373
1374 /* Map Internal Memory at FB Base */
1375 intmem_location.f.mc_fb_start = W100_FB_BASE >> 8;
1376 intmem_location.f.mc_fb_top = (W100_FB_BASE+MEM_INT_SIZE) >> 8;
1377 writel((u32) (intmem_location.val), remapped_regs + mmMC_FB_LOCATION);
1378
1379 /* Unmap External Memory - value is *probably* irrelevant but may have meaning
1380 to acceleration libraries */
1381 extmem_location.f.mc_ext_mem_start = MEM_EXT_BASE_VALUE >> 8;
1382 extmem_location.f.mc_ext_mem_top = (MEM_EXT_BASE_VALUE-1) >> 8;
1383 writel((u32) (extmem_location.val), remapped_regs + mmMC_EXT_MEM_LOCATION);
1384 } else {
1385 /* Map Internal Memory to its default location */
1386 intmem_location.f.mc_fb_start = MEM_INT_BASE_VALUE >> 8;
1387 intmem_location.f.mc_fb_top = (MEM_INT_BASE_VALUE+MEM_INT_SIZE) >> 8;
1388 writel((u32) (intmem_location.val), remapped_regs + mmMC_FB_LOCATION);
1389
1390 /* Map External Memory at FB Base */
1391 extmem_location.f.mc_ext_mem_start = W100_FB_BASE >> 8;
1392 extmem_location.f.mc_ext_mem_top = (W100_FB_BASE+par->mach->mem->size) >> 8;
1393 writel((u32) (extmem_location.val), remapped_regs + mmMC_EXT_MEM_LOCATION);
1394
1395 writel(0x00007800, remapped_regs + mmMC_BIST_CTRL);
1396 writel(mem->ext_cntl, remapped_regs + mmMEM_EXT_CNTL);
1397 writel(0x00200021, remapped_regs + mmMEM_SDRAM_MODE_REG);
1398 udelay(100);
1399 writel(0x80200021, remapped_regs + mmMEM_SDRAM_MODE_REG);
1400 udelay(100);
1401 writel(mem->sdram_mode_reg, remapped_regs + mmMEM_SDRAM_MODE_REG);
1402 udelay(100);
1403 writel(mem->ext_timing_cntl, remapped_regs + mmMEM_EXT_TIMING_CNTL);
1404 writel(mem->io_cntl, remapped_regs + mmMEM_IO_CNTL);
1405 if (bm_mem) {
1406 writel(bm_mem->ext_mem_bw, remapped_regs + mmBM_EXT_MEM_BANDWIDTH);
1407 writel(bm_mem->offset, remapped_regs + mmBM_OFFSET);
1408 writel(bm_mem->ext_timing_ctl, remapped_regs + mmBM_MEM_EXT_TIMING_CNTL);
1409 writel(bm_mem->ext_cntl, remapped_regs + mmBM_MEM_EXT_CNTL);
1410 writel(bm_mem->mode_reg, remapped_regs + mmBM_MEM_MODE_REG);
1411 writel(bm_mem->io_cntl, remapped_regs + mmBM_MEM_IO_CNTL);
1412 writel(bm_mem->config, remapped_regs + mmBM_CONFIG);
1413 }
1414 }
1415 }
1416
1417 static void w100_set_dispregs(struct w100fb_par *par)
1418 {
1419 unsigned long rot=0, divider, offset=0;
1420 union graphic_ctrl_u graphic_ctrl;
1421
1422 /* See if the mode has been rotated */
1423 if (par->xres == par->mode->xres) {
1424 if (par->flip) {
1425 rot=3; /* 180 degree */
1426 offset=(par->xres * par->yres) - 1;
1427 } /* else 0 degree */
1428 divider = par->mode->pixclk_divider;
1429 } else {
1430 if (par->flip) {
1431 rot=2; /* 270 degree */
1432 offset=par->xres - 1;
1433 } else {
1434 rot=1; /* 90 degree */
1435 offset=par->xres * (par->yres - 1);
1436 }
1437 divider = par->mode->pixclk_divider_rotated;
1438 }
1439
1440 graphic_ctrl.val = 0; /* w32xx doesn't like undefined bits */
1441 switch (par->chip_id) {
1442 case CHIP_ID_W100:
1443 graphic_ctrl.f_w100.color_depth=6;
1444 graphic_ctrl.f_w100.en_crtc=1;
1445 graphic_ctrl.f_w100.en_graphic_req=1;
1446 graphic_ctrl.f_w100.en_graphic_crtc=1;
1447 graphic_ctrl.f_w100.lcd_pclk_on=1;
1448 graphic_ctrl.f_w100.lcd_sclk_on=1;
1449 graphic_ctrl.f_w100.low_power_on=0;
1450 graphic_ctrl.f_w100.req_freq=0;
1451 graphic_ctrl.f_w100.portrait_mode=rot;
1452
1453 /* Zaurus needs this */
1454 switch(par->xres) {
1455 case 240:
1456 case 320:
1457 default:
1458 graphic_ctrl.f_w100.total_req_graphic=0xa0;
1459 break;
1460 case 480:
1461 case 640:
1462 switch(rot) {
1463 case 0: /* 0 */
1464 case 3: /* 180 */
1465 graphic_ctrl.f_w100.low_power_on=1;
1466 graphic_ctrl.f_w100.req_freq=5;
1467 break;
1468 case 1: /* 90 */
1469 case 2: /* 270 */
1470 graphic_ctrl.f_w100.req_freq=4;
1471 break;
1472 default:
1473 break;
1474 }
1475 graphic_ctrl.f_w100.total_req_graphic=0xf0;
1476 break;
1477 }
1478 break;
1479 case CHIP_ID_W3200:
1480 case CHIP_ID_W3220:
1481 graphic_ctrl.f_w32xx.color_depth=6;
1482 graphic_ctrl.f_w32xx.en_crtc=1;
1483 graphic_ctrl.f_w32xx.en_graphic_req=1;
1484 graphic_ctrl.f_w32xx.en_graphic_crtc=1;
1485 graphic_ctrl.f_w32xx.lcd_pclk_on=1;
1486 graphic_ctrl.f_w32xx.lcd_sclk_on=1;
1487 graphic_ctrl.f_w32xx.low_power_on=0;
1488 graphic_ctrl.f_w32xx.req_freq=0;
1489 graphic_ctrl.f_w32xx.total_req_graphic=par->mode->xres >> 1; /* panel xres, not mode */
1490 graphic_ctrl.f_w32xx.portrait_mode=rot;
1491 break;
1492 }
1493
1494 /* Set the pixel clock source and divider */
1495 w100_pwr_state.pclk_cntl.f.pclk_src_sel = par->mode->pixclk_src;
1496 w100_pwr_state.pclk_cntl.f.pclk_post_div = divider;
1497 writel((u32) (w100_pwr_state.pclk_cntl.val), remapped_regs + mmPCLK_CNTL);
1498
1499 writel(graphic_ctrl.val, remapped_regs + mmGRAPHIC_CTRL);
1500 writel(W100_FB_BASE + ((offset * BITS_PER_PIXEL/8)&~0x03UL), remapped_regs + mmGRAPHIC_OFFSET);
1501 writel((par->xres*BITS_PER_PIXEL/8), remapped_regs + mmGRAPHIC_PITCH);
1502 }
1503
1504
1505 /*
1506 * Work out how long the sync pulse lasts
1507 * Value is 1/(time in seconds)
1508 */
1509 static void calc_hsync(struct w100fb_par *par)
1510 {
1511 unsigned long hsync;
1512 struct w100_mode *mode = par->mode;
1513 union crtc_ss_u crtc_ss;
1514
1515 if (mode->pixclk_src == CLK_SRC_XTAL)
1516 hsync=par->mach->xtal_freq;
1517 else
1518 hsync=((par->fastpll_mode && mode->fast_pll_freq) ? mode->fast_pll_freq : mode->pll_freq)*100000;
1519
1520 hsync /= (w100_pwr_state.pclk_cntl.f.pclk_post_div + 1);
1521
1522 crtc_ss.val = readl(remapped_regs + mmCRTC_SS);
1523 if (crtc_ss.val)
1524 par->hsync_len = hsync / (crtc_ss.f.ss_end-crtc_ss.f.ss_start);
1525 else
1526 par->hsync_len = 0;
1527 }
1528
1529 static void w100_suspend(u32 mode)
1530 {
1531 u32 val;
1532
1533 writel(0x7FFF8000, remapped_regs + mmMC_EXT_MEM_LOCATION);
1534 writel(0x00FF0000, remapped_regs + mmMC_PERF_MON_CNTL);
1535
1536 val = readl(remapped_regs + mmMEM_EXT_TIMING_CNTL);
1537 val &= ~(0x00100000); /* bit20=0 */
1538 val |= 0xFF000000; /* bit31:24=0xff */
1539 writel(val, remapped_regs + mmMEM_EXT_TIMING_CNTL);
1540
1541 val = readl(remapped_regs + mmMEM_EXT_CNTL);
1542 val &= ~(0x00040000); /* bit18=0 */
1543 val |= 0x00080000; /* bit19=1 */
1544 writel(val, remapped_regs + mmMEM_EXT_CNTL);
1545
1546 udelay(1); /* wait 1us */
1547
1548 if (mode == W100_SUSPEND_EXTMEM) {
1549 /* CKE: Tri-State */
1550 val = readl(remapped_regs + mmMEM_EXT_CNTL);
1551 val |= 0x40000000; /* bit30=1 */
1552 writel(val, remapped_regs + mmMEM_EXT_CNTL);
1553
1554 /* CLK: Stop */
1555 val = readl(remapped_regs + mmMEM_EXT_CNTL);
1556 val &= ~(0x00000001); /* bit0=0 */
1557 writel(val, remapped_regs + mmMEM_EXT_CNTL);
1558 } else {
1559 writel(0x00000000, remapped_regs + mmSCLK_CNTL);
1560 writel(0x000000BF, remapped_regs + mmCLK_PIN_CNTL);
1561 writel(0x00000015, remapped_regs + mmPWRMGT_CNTL);
1562
1563 udelay(5);
1564
1565 val = readl(remapped_regs + mmPLL_CNTL);
1566 val |= 0x00000004; /* bit2=1 */
1567 writel(val, remapped_regs + mmPLL_CNTL);
1568 writel(0x0000001d, remapped_regs + mmPWRMGT_CNTL);
1569 }
1570 }
1571
1572 static void w100_vsync(void)
1573 {
1574 u32 tmp;
1575 int timeout = 30000; /* VSync timeout = 30[ms] > 16.8[ms] */
1576
1577 tmp = readl(remapped_regs + mmACTIVE_V_DISP);
1578
1579 /* set vline pos */
1580 writel((tmp >> 16) & 0x3ff, remapped_regs + mmDISP_INT_CNTL);
1581
1582 /* disable vline irq */
1583 tmp = readl(remapped_regs + mmGEN_INT_CNTL);
1584
1585 tmp &= ~0x00000002;
1586 writel(tmp, remapped_regs + mmGEN_INT_CNTL);
1587
1588 /* clear vline irq status */
1589 writel(0x00000002, remapped_regs + mmGEN_INT_STATUS);
1590
1591 /* enable vline irq */
1592 writel((tmp | 0x00000002), remapped_regs + mmGEN_INT_CNTL);
1593
1594 /* clear vline irq status */
1595 writel(0x00000002, remapped_regs + mmGEN_INT_STATUS);
1596
1597 while(timeout > 0) {
1598 if (readl(remapped_regs + mmGEN_INT_STATUS) & 0x00000002)
1599 break;
1600 udelay(1);
1601 timeout--;
1602 }
1603
1604 /* disable vline irq */
1605 writel(tmp, remapped_regs + mmGEN_INT_CNTL);
1606
1607 /* clear vline irq status */
1608 writel(0x00000002, remapped_regs + mmGEN_INT_STATUS);
1609 }
1610
1611 static struct platform_driver w100fb_driver = {
1612 .probe = w100fb_probe,
1613 .remove = w100fb_remove,
1614 .suspend = w100fb_suspend,
1615 .resume = w100fb_resume,
1616 .driver = {
1617 .name = "w100fb",
1618 },
1619 };
1620
1621 int __devinit w100fb_init(void)
1622 {
1623 return platform_driver_register(&w100fb_driver);
1624 }
1625
1626 void __exit w100fb_cleanup(void)
1627 {
1628 platform_driver_unregister(&w100fb_driver);
1629 }
1630
1631 module_init(w100fb_init);
1632 module_exit(w100fb_cleanup);
1633
1634 MODULE_DESCRIPTION("ATI Imageon w100 framebuffer driver");
1635 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree