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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / video / w100fb.c
blob90a2e30272ad7ae90e4b106426dd37c486c73cd6
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/slab.h>
34 #include <linux/string.h>
35 #include <linux/vmalloc.h>
36 #include <linux/module.h>
37 #include <asm/io.h>
38 #include <asm/uaccess.h>
39 #include <video/w100fb.h>
40 #include "w100fb.h"
41
42 /*
43 * Prototypes
44 */
45 static void w100_suspend(u32 mode);
46 static void w100_vsync(void);
47 static void w100_hw_init(struct w100fb_par*);
48 static void w100_pwm_setup(struct w100fb_par*);
49 static void w100_init_clocks(struct w100fb_par*);
50 static void w100_setup_memory(struct w100fb_par*);
51 static void w100_init_lcd(struct w100fb_par*);
52 static void w100_set_dispregs(struct w100fb_par*);
53 static void w100_update_enable(void);
54 static void w100_update_disable(void);
55 static void calc_hsync(struct w100fb_par *par);
56 static void w100_init_graphic_engine(struct w100fb_par *par);
57 struct w100_pll_info *w100_get_xtal_table(unsigned int freq) __devinit;
58
59 /* Pseudo palette size */
60 #define MAX_PALETTES 16
61
62 #define W100_SUSPEND_EXTMEM 0
63 #define W100_SUSPEND_ALL 1
64
65 #define BITS_PER_PIXEL 16
66
67 /* Remapped addresses for base cfg, memmapped regs and the frame buffer itself */
68 static void *remapped_base;
69 static void *remapped_regs;
70 static void *remapped_fbuf;
71
72 #define REMAPPED_FB_LEN 0x15ffff
73
74 /* This is the offset in the w100's address space we map the current
75 framebuffer memory to. We use the position of external memory as
76 we can remap internal memory to there if external isn't present. */
77 #define W100_FB_BASE MEM_EXT_BASE_VALUE
78
79
80 /*
81 * Sysfs functions
82 */
83 static ssize_t flip_show(struct device *dev, struct device_attribute *attr, char *buf)
84 {
85 struct fb_info *info = dev_get_drvdata(dev);
86 struct w100fb_par *par=info->par;
87
88 return sprintf(buf, "%d\n",par->flip);
89 }
90
91 static ssize_t flip_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
92 {
93 unsigned int flip;
94 struct fb_info *info = dev_get_drvdata(dev);
95 struct w100fb_par *par=info->par;
96
97 flip = simple_strtoul(buf, NULL, 10);
98
99 if (flip > 0)
100 par->flip = 1;
101 else
102 par->flip = 0;
103
104 w100_update_disable();
105 w100_set_dispregs(par);
106 w100_update_enable();
107
108 calc_hsync(par);
109
110 return count;
111 }
112
113 static DEVICE_ATTR(flip, 0644, flip_show, flip_store);
114
115 static ssize_t w100fb_reg_read(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
116 {
117 unsigned long regs, param;
118 regs = simple_strtoul(buf, NULL, 16);
119 param = readl(remapped_regs + regs);
120 printk("Read Register 0x%08lX: 0x%08lX\n", regs, param);
121 return count;
122 }
123
124 static DEVICE_ATTR(reg_read, 0200, NULL, w100fb_reg_read);
125
126 static ssize_t w100fb_reg_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
127 {
128 unsigned long regs, param;
129 sscanf(buf, "%lx %lx", &regs, &param);
130
131 if (regs <= 0x2000) {
132 printk("Write Register 0x%08lX: 0x%08lX\n", regs, param);
133 writel(param, remapped_regs + regs);
134 }
135
136 return count;
137 }
138
139 static DEVICE_ATTR(reg_write, 0200, NULL, w100fb_reg_write);
140
141
142 static ssize_t fastpllclk_show(struct device *dev, struct device_attribute *attr, char *buf)
143 {
144 struct fb_info *info = dev_get_drvdata(dev);
145 struct w100fb_par *par=info->par;
146
147 return sprintf(buf, "%d\n",par->fastpll_mode);
148 }
149
150 static ssize_t fastpllclk_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
151 {
152 struct fb_info *info = dev_get_drvdata(dev);
153 struct w100fb_par *par=info->par;
154
155 if (simple_strtoul(buf, NULL, 10) > 0) {
156 par->fastpll_mode=1;
157 printk("w100fb: Using fast system clock (if possible)\n");
158 } else {
159 par->fastpll_mode=0;
160 printk("w100fb: Using normal system clock\n");
161 }
162
163 w100_init_clocks(par);
164 calc_hsync(par);
165
166 return count;
167 }
168
169 static DEVICE_ATTR(fastpllclk, 0644, fastpllclk_show, fastpllclk_store);
170
171 /*
172 * Some touchscreens need hsync information from the video driver to
173 * function correctly. We export it here.
174 */
175 unsigned long w100fb_get_hsynclen(struct device *dev)
176 {
177 struct fb_info *info = dev_get_drvdata(dev);
178 struct w100fb_par *par=info->par;
179
180 /* If display is blanked/suspended, hsync isn't active */
181 if (par->blanked)
182 return 0;
183 else
184 return par->hsync_len;
185 }
186 EXPORT_SYMBOL(w100fb_get_hsynclen);
187
188 static void w100fb_clear_screen(struct w100fb_par *par)
189 {
190 memset_io(remapped_fbuf + (W100_FB_BASE-MEM_WINDOW_BASE), 0, (par->xres * par->yres * BITS_PER_PIXEL/8));
191 }
192
193
194 /*
195 * Set a palette value from rgb components
196 */
197 static int w100fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
198 u_int trans, struct fb_info *info)
199 {
200 unsigned int val;
201 int ret = 1;
202
203 /*
204 * If greyscale is true, then we convert the RGB value
205 * to greyscale no matter what visual we are using.
206 */
207 if (info->var.grayscale)
208 red = green = blue = (19595 * red + 38470 * green + 7471 * blue) >> 16;
209
210 /*
211 * 16-bit True Colour. We encode the RGB value
212 * according to the RGB bitfield information.
213 */
214 if (regno < MAX_PALETTES) {
215 u32 *pal = info->pseudo_palette;
216
217 val = (red & 0xf800) | ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
218 pal[regno] = val;
219 ret = 0;
220 }
221 return ret;
222 }
223
224
225 /*
226 * Blank the display based on value in blank_mode
227 */
228 static int w100fb_blank(int blank_mode, struct fb_info *info)
229 {
230 struct w100fb_par *par = info->par;
231 struct w100_tg_info *tg = par->mach->tg;
232
233 switch(blank_mode) {
234
235 case FB_BLANK_NORMAL: /* Normal blanking */
236 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
237 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
238 case FB_BLANK_POWERDOWN: /* Poweroff */
239 if (par->blanked == 0) {
240 if(tg && tg->suspend)
241 tg->suspend(par);
242 par->blanked = 1;
243 }
244 break;
245
246 case FB_BLANK_UNBLANK: /* Unblanking */
247 if (par->blanked != 0) {
248 if(tg && tg->resume)
249 tg->resume(par);
250 par->blanked = 0;
251 }
252 break;
253 }
254 return 0;
255 }
256
257
258 static void w100_fifo_wait(int entries)
259 {
260 union rbbm_status_u status;
261 int i;
262
263 for (i = 0; i < 2000000; i++) {
264 status.val = readl(remapped_regs + mmRBBM_STATUS);
265 if (status.f.cmdfifo_avail >= entries)
266 return;
267 udelay(1);
268 }
269 printk(KERN_ERR "w100fb: FIFO Timeout!\n");
270 }
271
272
273 static int w100fb_sync(struct fb_info *info)
274 {
275 union rbbm_status_u status;
276 int i;
277
278 for (i = 0; i < 2000000; i++) {
279 status.val = readl(remapped_regs + mmRBBM_STATUS);
280 if (!status.f.gui_active)
281 return 0;
282 udelay(1);
283 }
284 printk(KERN_ERR "w100fb: Graphic engine timeout!\n");
285 return -EBUSY;
286 }
287
288
289 static void w100_init_graphic_engine(struct w100fb_par *par)
290 {
291 union dp_gui_master_cntl_u gmc;
292 union dp_mix_u dp_mix;
293 union dp_datatype_u dp_datatype;
294 union dp_cntl_u dp_cntl;
295
296 w100_fifo_wait(4);
297 writel(W100_FB_BASE, remapped_regs + mmDST_OFFSET);
298 writel(par->xres, remapped_regs + mmDST_PITCH);
299 writel(W100_FB_BASE, remapped_regs + mmSRC_OFFSET);
300 writel(par->xres, remapped_regs + mmSRC_PITCH);
301
302 w100_fifo_wait(3);
303 writel(0, remapped_regs + mmSC_TOP_LEFT);
304 writel((par->yres << 16) | par->xres, remapped_regs + mmSC_BOTTOM_RIGHT);
305 writel(0x1fff1fff, remapped_regs + mmSRC_SC_BOTTOM_RIGHT);
306
307 w100_fifo_wait(4);
308 dp_cntl.val = 0;
309 dp_cntl.f.dst_x_dir = 1;
310 dp_cntl.f.dst_y_dir = 1;
311 dp_cntl.f.src_x_dir = 1;
312 dp_cntl.f.src_y_dir = 1;
313 dp_cntl.f.dst_major_x = 1;
314 dp_cntl.f.src_major_x = 1;
315 writel(dp_cntl.val, remapped_regs + mmDP_CNTL);
316
317 gmc.val = 0;
318 gmc.f.gmc_src_pitch_offset_cntl = 1;
319 gmc.f.gmc_dst_pitch_offset_cntl = 1;
320 gmc.f.gmc_src_clipping = 1;
321 gmc.f.gmc_dst_clipping = 1;
322 gmc.f.gmc_brush_datatype = GMC_BRUSH_NONE;
323 gmc.f.gmc_dst_datatype = 3; /* from DstType_16Bpp_444 */
324 gmc.f.gmc_src_datatype = SRC_DATATYPE_EQU_DST;
325 gmc.f.gmc_byte_pix_order = 1;
326 gmc.f.gmc_default_sel = 0;
327 gmc.f.gmc_rop3 = ROP3_SRCCOPY;
328 gmc.f.gmc_dp_src_source = DP_SRC_MEM_RECTANGULAR;
329 gmc.f.gmc_clr_cmp_fcn_dis = 1;
330 gmc.f.gmc_wr_msk_dis = 1;
331 gmc.f.gmc_dp_op = DP_OP_ROP;
332 writel(gmc.val, remapped_regs + mmDP_GUI_MASTER_CNTL);
333
334 dp_datatype.val = dp_mix.val = 0;
335 dp_datatype.f.dp_dst_datatype = gmc.f.gmc_dst_datatype;
336 dp_datatype.f.dp_brush_datatype = gmc.f.gmc_brush_datatype;
337 dp_datatype.f.dp_src2_type = 0;
338 dp_datatype.f.dp_src2_datatype = gmc.f.gmc_src_datatype;
339 dp_datatype.f.dp_src_datatype = gmc.f.gmc_src_datatype;
340 dp_datatype.f.dp_byte_pix_order = gmc.f.gmc_byte_pix_order;
341 writel(dp_datatype.val, remapped_regs + mmDP_DATATYPE);
342
343 dp_mix.f.dp_src_source = gmc.f.gmc_dp_src_source;
344 dp_mix.f.dp_src2_source = 1;
345 dp_mix.f.dp_rop3 = gmc.f.gmc_rop3;
346 dp_mix.f.dp_op = gmc.f.gmc_dp_op;
347 writel(dp_mix.val, remapped_regs + mmDP_MIX);
348 }
349
350
351 static void w100fb_fillrect(struct fb_info *info,
352 const struct fb_fillrect *rect)
353 {
354 union dp_gui_master_cntl_u gmc;
355
356 if (info->state != FBINFO_STATE_RUNNING)
357 return;
358 if (info->flags & FBINFO_HWACCEL_DISABLED) {
359 cfb_fillrect(info, rect);
360 return;
361 }
362
363 gmc.val = readl(remapped_regs + mmDP_GUI_MASTER_CNTL);
364 gmc.f.gmc_rop3 = ROP3_PATCOPY;
365 gmc.f.gmc_brush_datatype = GMC_BRUSH_SOLID_COLOR;
366 w100_fifo_wait(2);
367 writel(gmc.val, remapped_regs + mmDP_GUI_MASTER_CNTL);
368 writel(rect->color, remapped_regs + mmDP_BRUSH_FRGD_CLR);
369
370 w100_fifo_wait(2);
371 writel((rect->dy << 16) | (rect->dx & 0xffff), remapped_regs + mmDST_Y_X);
372 writel((rect->width << 16) | (rect->height & 0xffff),
373 remapped_regs + mmDST_WIDTH_HEIGHT);
374 }
375
376
377 static void w100fb_copyarea(struct fb_info *info,
378 const struct fb_copyarea *area)
379 {
380 u32 dx = area->dx, dy = area->dy, sx = area->sx, sy = area->sy;
381 u32 h = area->height, w = area->width;
382 union dp_gui_master_cntl_u gmc;
383
384 if (info->state != FBINFO_STATE_RUNNING)
385 return;
386 if (info->flags & FBINFO_HWACCEL_DISABLED) {
387 cfb_copyarea(info, area);
388 return;
389 }
390
391 gmc.val = readl(remapped_regs + mmDP_GUI_MASTER_CNTL);
392 gmc.f.gmc_rop3 = ROP3_SRCCOPY;
393 gmc.f.gmc_brush_datatype = GMC_BRUSH_NONE;
394 w100_fifo_wait(1);
395 writel(gmc.val, remapped_regs + mmDP_GUI_MASTER_CNTL);
396
397 w100_fifo_wait(3);
398 writel((sy << 16) | (sx & 0xffff), remapped_regs + mmSRC_Y_X);
399 writel((dy << 16) | (dx & 0xffff), remapped_regs + mmDST_Y_X);
400 writel((w << 16) | (h & 0xffff), remapped_regs + mmDST_WIDTH_HEIGHT);
401 }
402
403
404 /*
405 * Change the resolution by calling the appropriate hardware functions
406 */
407 static void w100fb_activate_var(struct w100fb_par *par)
408 {
409 struct w100_tg_info *tg = par->mach->tg;
410
411 w100_pwm_setup(par);
412 w100_setup_memory(par);
413 w100_init_clocks(par);
414 w100fb_clear_screen(par);
415 w100_vsync();
416
417 w100_update_disable();
418 w100_init_lcd(par);
419 w100_set_dispregs(par);
420 w100_update_enable();
421 w100_init_graphic_engine(par);
422
423 calc_hsync(par);
424
425 if (!par->blanked && tg && tg->change)
426 tg->change(par);
427 }
428
429
430 /* Select the smallest mode that allows the desired resolution to be
431 * displayed. If desired, the x and y parameters can be rounded up to
432 * match the selected mode.
433 */
434 static struct w100_mode *w100fb_get_mode(struct w100fb_par *par, unsigned int *x, unsigned int *y, int saveval)
435 {
436 struct w100_mode *mode = NULL;
437 struct w100_mode *modelist = par->mach->modelist;
438 unsigned int best_x = 0xffffffff, best_y = 0xffffffff;
439 unsigned int i;
440
441 for (i = 0 ; i < par->mach->num_modes ; i++) {
442 if (modelist[i].xres >= *x && modelist[i].yres >= *y &&
443 modelist[i].xres < best_x && modelist[i].yres < best_y) {
444 best_x = modelist[i].xres;
445 best_y = modelist[i].yres;
446 mode = &modelist[i];
447 } else if(modelist[i].xres >= *y && modelist[i].yres >= *x &&
448 modelist[i].xres < best_y && modelist[i].yres < best_x) {
449 best_x = modelist[i].yres;
450 best_y = modelist[i].xres;
451 mode = &modelist[i];
452 }
453 }
454
455 if (mode && saveval) {
456 *x = best_x;
457 *y = best_y;
458 }
459
460 return mode;
461 }
462
463
464 /*
465 * w100fb_check_var():
466 * Get the video params out of 'var'. If a value doesn't fit, round it up,
467 * if it's too big, return -EINVAL.
468 */
469 static int w100fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
470 {
471 struct w100fb_par *par=info->par;
472
473 if(!w100fb_get_mode(par, &var->xres, &var->yres, 1))
474 return -EINVAL;
475
476 if (par->mach->mem && ((var->xres*var->yres*BITS_PER_PIXEL/8) > (par->mach->mem->size+1)))
477 return -EINVAL;
478
479 if (!par->mach->mem && ((var->xres*var->yres*BITS_PER_PIXEL/8) > (MEM_INT_SIZE+1)))
480 return -EINVAL;
481
482 var->xres_virtual = max(var->xres_virtual, var->xres);
483 var->yres_virtual = max(var->yres_virtual, var->yres);
484
485 if (var->bits_per_pixel > BITS_PER_PIXEL)
486 return -EINVAL;
487 else
488 var->bits_per_pixel = BITS_PER_PIXEL;
489
490 var->red.offset = 11;
491 var->red.length = 5;
492 var->green.offset = 5;
493 var->green.length = 6;
494 var->blue.offset = 0;
495 var->blue.length = 5;
496 var->transp.offset = var->transp.length = 0;
497
498 var->nonstd = 0;
499 var->height = -1;
500 var->width = -1;
501 var->vmode = FB_VMODE_NONINTERLACED;
502 var->sync = 0;
503 var->pixclock = 0x04; /* 171521; */
504
505 return 0;
506 }
507
508
509 /*
510 * w100fb_set_par():
511 * Set the user defined part of the display for the specified console
512 * by looking at the values in info.var
513 */
514 static int w100fb_set_par(struct fb_info *info)
515 {
516 struct w100fb_par *par=info->par;
517
518 if (par->xres != info->var.xres || par->yres != info->var.yres) {
519 par->xres = info->var.xres;
520 par->yres = info->var.yres;
521 par->mode = w100fb_get_mode(par, &par->xres, &par->yres, 0);
522
523 info->fix.visual = FB_VISUAL_TRUECOLOR;
524 info->fix.ypanstep = 0;
525 info->fix.ywrapstep = 0;
526 info->fix.line_length = par->xres * BITS_PER_PIXEL / 8;
527
528 mutex_lock(&info->mm_lock);
529 if ((par->xres*par->yres*BITS_PER_PIXEL/8) > (MEM_INT_SIZE+1)) {
530 par->extmem_active = 1;
531 info->fix.smem_len = par->mach->mem->size+1;
532 } else {
533 par->extmem_active = 0;
534 info->fix.smem_len = MEM_INT_SIZE+1;
535 }
536 mutex_unlock(&info->mm_lock);
537
538 w100fb_activate_var(par);
539 }
540 return 0;
541 }
542
543
544 /*
545 * Frame buffer operations
546 */
547 static struct fb_ops w100fb_ops = {
548 .owner = THIS_MODULE,
549 .fb_check_var = w100fb_check_var,
550 .fb_set_par = w100fb_set_par,
551 .fb_setcolreg = w100fb_setcolreg,
552 .fb_blank = w100fb_blank,
553 .fb_fillrect = w100fb_fillrect,
554 .fb_copyarea = w100fb_copyarea,
555 .fb_imageblit = cfb_imageblit,
556 .fb_sync = w100fb_sync,
557 };
558
559 #ifdef CONFIG_PM
560 static void w100fb_save_vidmem(struct w100fb_par *par)
561 {
562 int memsize;
563
564 if (par->extmem_active) {
565 memsize=par->mach->mem->size;
566 par->saved_extmem = vmalloc(memsize);
567 if (par->saved_extmem)
568 memcpy_fromio(par->saved_extmem, remapped_fbuf + (W100_FB_BASE-MEM_WINDOW_BASE), memsize);
569 }
570 memsize=MEM_INT_SIZE;
571 par->saved_intmem = vmalloc(memsize);
572 if (par->saved_intmem && par->extmem_active)
573 memcpy_fromio(par->saved_intmem, remapped_fbuf + (W100_FB_BASE-MEM_INT_BASE_VALUE), memsize);
574 else if (par->saved_intmem)
575 memcpy_fromio(par->saved_intmem, remapped_fbuf + (W100_FB_BASE-MEM_WINDOW_BASE), memsize);
576 }
577
578 static void w100fb_restore_vidmem(struct w100fb_par *par)
579 {
580 int memsize;
581
582 if (par->extmem_active && par->saved_extmem) {
583 memsize=par->mach->mem->size;
584 memcpy_toio(remapped_fbuf + (W100_FB_BASE-MEM_WINDOW_BASE), par->saved_extmem, memsize);
585 vfree(par->saved_extmem);
586 }
587 if (par->saved_intmem) {
588 memsize=MEM_INT_SIZE;
589 if (par->extmem_active)
590 memcpy_toio(remapped_fbuf + (W100_FB_BASE-MEM_INT_BASE_VALUE), par->saved_intmem, memsize);
591 else
592 memcpy_toio(remapped_fbuf + (W100_FB_BASE-MEM_WINDOW_BASE), par->saved_intmem, memsize);
593 vfree(par->saved_intmem);
594 }
595 }
596
597 static int w100fb_suspend(struct platform_device *dev, pm_message_t state)
598 {
599 struct fb_info *info = platform_get_drvdata(dev);
600 struct w100fb_par *par=info->par;
601 struct w100_tg_info *tg = par->mach->tg;
602
603 w100fb_save_vidmem(par);
604 if(tg && tg->suspend)
605 tg->suspend(par);
606 w100_suspend(W100_SUSPEND_ALL);
607 par->blanked = 1;
608
609 return 0;
610 }
611
612 static int w100fb_resume(struct platform_device *dev)
613 {
614 struct fb_info *info = platform_get_drvdata(dev);
615 struct w100fb_par *par=info->par;
616 struct w100_tg_info *tg = par->mach->tg;
617
618 w100_hw_init(par);
619 w100fb_activate_var(par);
620 w100fb_restore_vidmem(par);
621 if(tg && tg->resume)
622 tg->resume(par);
623 par->blanked = 0;
624
625 return 0;
626 }
627 #else
628 #define w100fb_suspend NULL
629 #define w100fb_resume NULL
630 #endif
631
632
633 int __devinit w100fb_probe(struct platform_device *pdev)
634 {
635 int err = -EIO;
636 struct w100fb_mach_info *inf;
637 struct fb_info *info = NULL;
638 struct w100fb_par *par;
639 struct resource *mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
640 unsigned int chip_id;
641
642 if (!mem)
643 return -EINVAL;
644
645 /* Remap the chip base address */
646 remapped_base = ioremap_nocache(mem->start+W100_CFG_BASE, W100_CFG_LEN);
647 if (remapped_base == NULL)
648 goto out;
649
650 /* Map the register space */
651 remapped_regs = ioremap_nocache(mem->start+W100_REG_BASE, W100_REG_LEN);
652 if (remapped_regs == NULL)
653 goto out;
654
655 /* Identify the chip */
656 printk("Found ");
657 chip_id = readl(remapped_regs + mmCHIP_ID);
658 switch(chip_id) {
659 case CHIP_ID_W100: printk("w100"); break;
660 case CHIP_ID_W3200: printk("w3200"); break;
661 case CHIP_ID_W3220: printk("w3220"); break;
662 default:
663 printk("Unknown imageon chip ID\n");
664 err = -ENODEV;
665 goto out;
666 }
667 printk(" at 0x%08lx.\n", (unsigned long) mem->start+W100_CFG_BASE);
668
669 /* Remap the framebuffer */
670 remapped_fbuf = ioremap_nocache(mem->start+MEM_WINDOW_BASE, MEM_WINDOW_SIZE);
671 if (remapped_fbuf == NULL)
672 goto out;
673
674 info=framebuffer_alloc(sizeof(struct w100fb_par), &pdev->dev);
675 if (!info) {
676 err = -ENOMEM;
677 goto out;
678 }
679
680 par = info->par;
681 platform_set_drvdata(pdev, info);
682
683 inf = pdev->dev.platform_data;
684 par->chip_id = chip_id;
685 par->mach = inf;
686 par->fastpll_mode = 0;
687 par->blanked = 0;
688
689 par->pll_table=w100_get_xtal_table(inf->xtal_freq);
690 if (!par->pll_table) {
691 printk(KERN_ERR "No matching Xtal definition found\n");
692 err = -EINVAL;
693 goto out;
694 }
695
696 info->pseudo_palette = kmalloc(sizeof (u32) * MAX_PALETTES, GFP_KERNEL);
697 if (!info->pseudo_palette) {
698 err = -ENOMEM;
699 goto out;
700 }
701
702 info->fbops = &w100fb_ops;
703 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
704 FBINFO_HWACCEL_FILLRECT;
705 info->node = -1;
706 info->screen_base = remapped_fbuf + (W100_FB_BASE-MEM_WINDOW_BASE);
707 info->screen_size = REMAPPED_FB_LEN;
708
709 strcpy(info->fix.id, "w100fb");
710 info->fix.type = FB_TYPE_PACKED_PIXELS;
711 info->fix.type_aux = 0;
712 info->fix.accel = FB_ACCEL_NONE;
713 info->fix.smem_start = mem->start+W100_FB_BASE;
714 info->fix.mmio_start = mem->start+W100_REG_BASE;
715 info->fix.mmio_len = W100_REG_LEN;
716
717 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
718 err = -ENOMEM;
719 goto out;
720 }
721
722 par->mode = &inf->modelist[0];
723 if(inf->init_mode & INIT_MODE_ROTATED) {
724 info->var.xres = par->mode->yres;
725 info->var.yres = par->mode->xres;
726 }
727 else {
728 info->var.xres = par->mode->xres;
729 info->var.yres = par->mode->yres;
730 }
731
732 if(inf->init_mode &= INIT_MODE_FLIPPED)
733 par->flip = 1;
734 else
735 par->flip = 0;
736
737 info->var.xres_virtual = info->var.xres;
738 info->var.yres_virtual = info->var.yres;
739 info->var.pixclock = 0x04; /* 171521; */
740 info->var.sync = 0;
741 info->var.grayscale = 0;
742 info->var.xoffset = info->var.yoffset = 0;
743 info->var.accel_flags = 0;
744 info->var.activate = FB_ACTIVATE_NOW;
745
746 w100_hw_init(par);
747
748 if (w100fb_check_var(&info->var, info) < 0) {
749 err = -EINVAL;
750 goto out;
751 }
752
753 if (register_framebuffer(info) < 0) {
754 err = -EINVAL;
755 goto out;
756 }
757
758 err = device_create_file(&pdev->dev, &dev_attr_fastpllclk);
759 err |= device_create_file(&pdev->dev, &dev_attr_reg_read);
760 err |= device_create_file(&pdev->dev, &dev_attr_reg_write);
761 err |= device_create_file(&pdev->dev, &dev_attr_flip);
762
763 if (err != 0)
764 printk(KERN_WARNING "fb%d: failed to register attributes (%d)\n",
765 info->node, err);
766
767 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, info->fix.id);
768 return 0;
769 out:
770 if (info) {
771 fb_dealloc_cmap(&info->cmap);
772 kfree(info->pseudo_palette);
773 }
774 if (remapped_fbuf != NULL)
775 iounmap(remapped_fbuf);
776 if (remapped_regs != NULL)
777 iounmap(remapped_regs);
778 if (remapped_base != NULL)
779 iounmap(remapped_base);
780 if (info)
781 framebuffer_release(info);
782 return err;
783 }
784
785
786 static int __devexit w100fb_remove(struct platform_device *pdev)
787 {
788 struct fb_info *info = platform_get_drvdata(pdev);
789 struct w100fb_par *par=info->par;
790
791 device_remove_file(&pdev->dev, &dev_attr_fastpllclk);
792 device_remove_file(&pdev->dev, &dev_attr_reg_read);
793 device_remove_file(&pdev->dev, &dev_attr_reg_write);
794 device_remove_file(&pdev->dev, &dev_attr_flip);
795
796 unregister_framebuffer(info);
797
798 vfree(par->saved_intmem);
799 vfree(par->saved_extmem);
800 kfree(info->pseudo_palette);
801 fb_dealloc_cmap(&info->cmap);
802
803 iounmap(remapped_base);
804 iounmap(remapped_regs);
805 iounmap(remapped_fbuf);
806
807 framebuffer_release(info);
808
809 return 0;
810 }
811
812
813 /* ------------------- chipset specific functions -------------------------- */
814
815
816 static void w100_soft_reset(void)
817 {
818 u16 val = readw((u16 *) remapped_base + cfgSTATUS);
819 writew(val | 0x08, (u16 *) remapped_base + cfgSTATUS);
820 udelay(100);
821 writew(0x00, (u16 *) remapped_base + cfgSTATUS);
822 udelay(100);
823 }
824
825 static void w100_update_disable(void)
826 {
827 union disp_db_buf_cntl_wr_u disp_db_buf_wr_cntl;
828
829 /* Prevent display updates */
830 disp_db_buf_wr_cntl.f.db_buf_cntl = 0x1e;
831 disp_db_buf_wr_cntl.f.update_db_buf = 0;
832 disp_db_buf_wr_cntl.f.en_db_buf = 0;
833 writel((u32) (disp_db_buf_wr_cntl.val), remapped_regs + mmDISP_DB_BUF_CNTL);
834 }
835
836 static void w100_update_enable(void)
837 {
838 union disp_db_buf_cntl_wr_u disp_db_buf_wr_cntl;
839
840 /* Enable display updates */
841 disp_db_buf_wr_cntl.f.db_buf_cntl = 0x1e;
842 disp_db_buf_wr_cntl.f.update_db_buf = 1;
843 disp_db_buf_wr_cntl.f.en_db_buf = 1;
844 writel((u32) (disp_db_buf_wr_cntl.val), remapped_regs + mmDISP_DB_BUF_CNTL);
845 }
846
847 unsigned long w100fb_gpio_read(int port)
848 {
849 unsigned long value;
850
851 if (port==W100_GPIO_PORT_A)
852 value = readl(remapped_regs + mmGPIO_DATA);
853 else
854 value = readl(remapped_regs + mmGPIO_DATA2);
855
856 return value;
857 }
858
859 void w100fb_gpio_write(int port, unsigned long value)
860 {
861 if (port==W100_GPIO_PORT_A)
862 writel(value, remapped_regs + mmGPIO_DATA);
863 else
864 writel(value, remapped_regs + mmGPIO_DATA2);
865 }
866 EXPORT_SYMBOL(w100fb_gpio_read);
867 EXPORT_SYMBOL(w100fb_gpio_write);
868
869 /*
870 * Initialization of critical w100 hardware
871 */
872 static void w100_hw_init(struct w100fb_par *par)
873 {
874 u32 temp32;
875 union cif_cntl_u cif_cntl;
876 union intf_cntl_u intf_cntl;
877 union cfgreg_base_u cfgreg_base;
878 union wrap_top_dir_u wrap_top_dir;
879 union cif_read_dbg_u cif_read_dbg;
880 union cpu_defaults_u cpu_default;
881 union cif_write_dbg_u cif_write_dbg;
882 union wrap_start_dir_u wrap_start_dir;
883 union cif_io_u cif_io;
884 struct w100_gpio_regs *gpio = par->mach->gpio;
885
886 w100_soft_reset();
887
888 /* This is what the fpga_init code does on reset. May be wrong
889 but there is little info available */
890 writel(0x31, remapped_regs + mmSCRATCH_UMSK);
891 for (temp32 = 0; temp32 < 10000; temp32++)
892 readl(remapped_regs + mmSCRATCH_UMSK);
893 writel(0x30, remapped_regs + mmSCRATCH_UMSK);
894
895 /* Set up CIF */
896 cif_io.val = defCIF_IO;
897 writel((u32)(cif_io.val), remapped_regs + mmCIF_IO);
898
899 cif_write_dbg.val = readl(remapped_regs + mmCIF_WRITE_DBG);
900 cif_write_dbg.f.dis_packer_ful_during_rbbm_timeout = 0;
901 cif_write_dbg.f.en_dword_split_to_rbbm = 1;
902 cif_write_dbg.f.dis_timeout_during_rbbm = 1;
903 writel((u32) (cif_write_dbg.val), remapped_regs + mmCIF_WRITE_DBG);
904
905 cif_read_dbg.val = readl(remapped_regs + mmCIF_READ_DBG);
906 cif_read_dbg.f.dis_rd_same_byte_to_trig_fetch = 1;
907 writel((u32) (cif_read_dbg.val), remapped_regs + mmCIF_READ_DBG);
908
909 cif_cntl.val = readl(remapped_regs + mmCIF_CNTL);
910 cif_cntl.f.dis_system_bits = 1;
911 cif_cntl.f.dis_mr = 1;
912 cif_cntl.f.en_wait_to_compensate_dq_prop_dly = 0;
913 cif_cntl.f.intb_oe = 1;
914 cif_cntl.f.interrupt_active_high = 1;
915 writel((u32) (cif_cntl.val), remapped_regs + mmCIF_CNTL);
916
917 /* Setup cfgINTF_CNTL and cfgCPU defaults */
918 intf_cntl.val = defINTF_CNTL;
919 intf_cntl.f.ad_inc_a = 1;
920 intf_cntl.f.ad_inc_b = 1;
921 intf_cntl.f.rd_data_rdy_a = 0;
922 intf_cntl.f.rd_data_rdy_b = 0;
923 writeb((u8) (intf_cntl.val), remapped_base + cfgINTF_CNTL);
924
925 cpu_default.val = defCPU_DEFAULTS;
926 cpu_default.f.access_ind_addr_a = 1;
927 cpu_default.f.access_ind_addr_b = 1;
928 cpu_default.f.access_scratch_reg = 1;
929 cpu_default.f.transition_size = 0;
930 writeb((u8) (cpu_default.val), remapped_base + cfgCPU_DEFAULTS);
931
932 /* set up the apertures */
933 writeb((u8) (W100_REG_BASE >> 16), remapped_base + cfgREG_BASE);
934
935 cfgreg_base.val = defCFGREG_BASE;
936 cfgreg_base.f.cfgreg_base = W100_CFG_BASE;
937 writel((u32) (cfgreg_base.val), remapped_regs + mmCFGREG_BASE);
938
939 wrap_start_dir.val = defWRAP_START_DIR;
940 wrap_start_dir.f.start_addr = WRAP_BUF_BASE_VALUE >> 1;
941 writel((u32) (wrap_start_dir.val), remapped_regs + mmWRAP_START_DIR);
942
943 wrap_top_dir.val = defWRAP_TOP_DIR;
944 wrap_top_dir.f.top_addr = WRAP_BUF_TOP_VALUE >> 1;
945 writel((u32) (wrap_top_dir.val), remapped_regs + mmWRAP_TOP_DIR);
946
947 writel((u32) 0x2440, remapped_regs + mmRBBM_CNTL);
948
949 /* Set the hardware to 565 colour */
950 temp32 = readl(remapped_regs + mmDISP_DEBUG2);
951 temp32 &= 0xff7fffff;
952 temp32 |= 0x00800000;
953 writel(temp32, remapped_regs + mmDISP_DEBUG2);
954
955 /* Initialise the GPIO lines */
956 if (gpio) {
957 writel(gpio->init_data1, remapped_regs + mmGPIO_DATA);
958 writel(gpio->init_data2, remapped_regs + mmGPIO_DATA2);
959 writel(gpio->gpio_dir1, remapped_regs + mmGPIO_CNTL1);
960 writel(gpio->gpio_oe1, remapped_regs + mmGPIO_CNTL2);
961 writel(gpio->gpio_dir2, remapped_regs + mmGPIO_CNTL3);
962 writel(gpio->gpio_oe2, remapped_regs + mmGPIO_CNTL4);
963 }
964 }
965
966
967 struct power_state {
968 union clk_pin_cntl_u clk_pin_cntl;
969 union pll_ref_fb_div_u pll_ref_fb_div;
970 union pll_cntl_u pll_cntl;
971 union sclk_cntl_u sclk_cntl;
972 union pclk_cntl_u pclk_cntl;
973 union pwrmgt_cntl_u pwrmgt_cntl;
974 int auto_mode; /* system clock auto changing? */
975 };
976
977
978 static struct power_state w100_pwr_state;
979
980 /* The PLL Fout is determined by (XtalFreq/(M+1)) * ((N_int+1) + (N_fac/8)) */
981
982 /* 12.5MHz Crystal PLL Table */
983 static struct w100_pll_info xtal_12500000[] = {
984 /*freq M N_int N_fac tfgoal lock_time */
985 { 50, 0, 1, 0, 0xe0, 56}, /* 50.00 MHz */
986 { 75, 0, 5, 0, 0xde, 37}, /* 75.00 MHz */
987 {100, 0, 7, 0, 0xe0, 28}, /* 100.00 MHz */
988 {125, 0, 9, 0, 0xe0, 22}, /* 125.00 MHz */
989 {150, 0, 11, 0, 0xe0, 17}, /* 150.00 MHz */
990 { 0, 0, 0, 0, 0, 0}, /* Terminator */
991 };
992
993 /* 14.318MHz Crystal PLL Table */
994 static struct w100_pll_info xtal_14318000[] = {
995 /*freq M N_int N_fac tfgoal lock_time */
996 { 40, 4, 13, 0, 0xe0, 80}, /* tfgoal guessed */
997 { 50, 1, 6, 0, 0xe0, 64}, /* 50.05 MHz */
998 { 57, 2, 11, 0, 0xe0, 53}, /* tfgoal guessed */
999 { 75, 0, 4, 3, 0xe0, 43}, /* 75.08 MHz */
1000 {100, 0, 6, 0, 0xe0, 32}, /* 100.10 MHz */
1001 { 0, 0, 0, 0, 0, 0},
1002 };
1003
1004 /* 16MHz Crystal PLL Table */
1005 static struct w100_pll_info xtal_16000000[] = {
1006 /*freq M N_int N_fac tfgoal lock_time */
1007 { 72, 1, 8, 0, 0xe0, 48}, /* tfgoal guessed */
1008 { 80, 1, 9, 0, 0xe0, 13}, /* tfgoal guessed */
1009 { 95, 1, 10, 7, 0xe0, 38}, /* tfgoal guessed */
1010 { 96, 1, 11, 0, 0xe0, 36}, /* tfgoal guessed */
1011 { 0, 0, 0, 0, 0, 0},
1012 };
1013
1014 static struct pll_entries {
1015 int xtal_freq;
1016 struct w100_pll_info *pll_table;
1017 } w100_pll_tables[] = {
1018 { 12500000, &xtal_12500000[0] },
1019 { 14318000, &xtal_14318000[0] },
1020 { 16000000, &xtal_16000000[0] },
1021 { 0 },
1022 };
1023
1024 struct w100_pll_info __devinit *w100_get_xtal_table(unsigned int freq)
1025 {
1026 struct pll_entries *pll_entry = w100_pll_tables;
1027
1028 do {
1029 if (freq == pll_entry->xtal_freq)
1030 return pll_entry->pll_table;
1031 pll_entry++;
1032 } while (pll_entry->xtal_freq);
1033 return 0;
1034 }
1035
1036
1037 static unsigned int w100_get_testcount(unsigned int testclk_sel)
1038 {
1039 union clk_test_cntl_u clk_test_cntl;
1040
1041 udelay(5);
1042
1043 /* Select the test clock source and reset */
1044 clk_test_cntl.f.start_check_freq = 0x0;
1045 clk_test_cntl.f.testclk_sel = testclk_sel;
1046 clk_test_cntl.f.tstcount_rst = 0x1; /* set reset */
1047 writel((u32) (clk_test_cntl.val), remapped_regs + mmCLK_TEST_CNTL);
1048
1049 clk_test_cntl.f.tstcount_rst = 0x0; /* clear reset */
1050 writel((u32) (clk_test_cntl.val), remapped_regs + mmCLK_TEST_CNTL);
1051
1052 /* Run clock test */
1053 clk_test_cntl.f.start_check_freq = 0x1;
1054 writel((u32) (clk_test_cntl.val), remapped_regs + mmCLK_TEST_CNTL);
1055
1056 /* Give the test time to complete */
1057 udelay(20);
1058
1059 /* Return the result */
1060 clk_test_cntl.val = readl(remapped_regs + mmCLK_TEST_CNTL);
1061 clk_test_cntl.f.start_check_freq = 0x0;
1062 writel((u32) (clk_test_cntl.val), remapped_regs + mmCLK_TEST_CNTL);
1063
1064 return clk_test_cntl.f.test_count;
1065 }
1066
1067
1068 static int w100_pll_adjust(struct w100_pll_info *pll)
1069 {
1070 unsigned int tf80;
1071 unsigned int tf20;
1072
1073 /* Initial Settings */
1074 w100_pwr_state.pll_cntl.f.pll_pwdn = 0x0; /* power down */
1075 w100_pwr_state.pll_cntl.f.pll_reset = 0x0; /* not reset */
1076 w100_pwr_state.pll_cntl.f.pll_tcpoff = 0x1; /* Hi-Z */
1077 w100_pwr_state.pll_cntl.f.pll_pvg = 0x0; /* VCO gain = 0 */
1078 w100_pwr_state.pll_cntl.f.pll_vcofr = 0x0; /* VCO frequency range control = off */
1079 w100_pwr_state.pll_cntl.f.pll_ioffset = 0x0; /* current offset inside VCO = 0 */
1080 w100_pwr_state.pll_cntl.f.pll_ring_off = 0x0;
1081
1082 /* Wai Ming 80 percent of VDD 1.3V gives 1.04V, minimum operating voltage is 1.08V
1083 * therefore, commented out the following lines
1084 * tf80 meant tf100
1085 */
1086 do {
1087 /* set VCO input = 0.8 * VDD */
1088 w100_pwr_state.pll_cntl.f.pll_dactal = 0xd;
1089 writel((u32) (w100_pwr_state.pll_cntl.val), remapped_regs + mmPLL_CNTL);
1090
1091 tf80 = w100_get_testcount(TESTCLK_SRC_PLL);
1092 if (tf80 >= (pll->tfgoal)) {
1093 /* set VCO input = 0.2 * VDD */
1094 w100_pwr_state.pll_cntl.f.pll_dactal = 0x7;
1095 writel((u32) (w100_pwr_state.pll_cntl.val), remapped_regs + mmPLL_CNTL);
1096
1097 tf20 = w100_get_testcount(TESTCLK_SRC_PLL);
1098 if (tf20 <= (pll->tfgoal))
1099 return 1; /* Success */
1100
1101 if ((w100_pwr_state.pll_cntl.f.pll_vcofr == 0x0) &&
1102 ((w100_pwr_state.pll_cntl.f.pll_pvg == 0x7) ||
1103 (w100_pwr_state.pll_cntl.f.pll_ioffset == 0x0))) {
1104 /* slow VCO config */
1105 w100_pwr_state.pll_cntl.f.pll_vcofr = 0x1;
1106 w100_pwr_state.pll_cntl.f.pll_pvg = 0x0;
1107 w100_pwr_state.pll_cntl.f.pll_ioffset = 0x0;
1108 continue;
1109 }
1110 }
1111 if ((w100_pwr_state.pll_cntl.f.pll_ioffset) < 0x3) {
1112 w100_pwr_state.pll_cntl.f.pll_ioffset += 0x1;
1113 } else if ((w100_pwr_state.pll_cntl.f.pll_pvg) < 0x7) {
1114 w100_pwr_state.pll_cntl.f.pll_ioffset = 0x0;
1115 w100_pwr_state.pll_cntl.f.pll_pvg += 0x1;
1116 } else {
1117 return 0; /* Error */
1118 }
1119 } while(1);
1120 }
1121
1122
1123 /*
1124 * w100_pll_calibration
1125 */
1126 static int w100_pll_calibration(struct w100_pll_info *pll)
1127 {
1128 int status;
1129
1130 status = w100_pll_adjust(pll);
1131
1132 /* PLL Reset And Lock */
1133 /* set VCO input = 0.5 * VDD */
1134 w100_pwr_state.pll_cntl.f.pll_dactal = 0xa;
1135 writel((u32) (w100_pwr_state.pll_cntl.val), remapped_regs + mmPLL_CNTL);
1136
1137 udelay(1); /* reset time */
1138
1139 /* enable charge pump */
1140 w100_pwr_state.pll_cntl.f.pll_tcpoff = 0x0; /* normal */
1141 writel((u32) (w100_pwr_state.pll_cntl.val), remapped_regs + mmPLL_CNTL);
1142
1143 /* set VCO input = Hi-Z, disable DAC */
1144 w100_pwr_state.pll_cntl.f.pll_dactal = 0x0;
1145 writel((u32) (w100_pwr_state.pll_cntl.val), remapped_regs + mmPLL_CNTL);
1146
1147 udelay(400); /* lock time */
1148
1149 /* PLL locked */
1150
1151 return status;
1152 }
1153
1154
1155 static int w100_pll_set_clk(struct w100_pll_info *pll)
1156 {
1157 int status;
1158
1159 if (w100_pwr_state.auto_mode == 1) /* auto mode */
1160 {
1161 w100_pwr_state.pwrmgt_cntl.f.pwm_fast_noml_hw_en = 0x0; /* disable fast to normal */
1162 w100_pwr_state.pwrmgt_cntl.f.pwm_noml_fast_hw_en = 0x0; /* disable normal to fast */
1163 writel((u32) (w100_pwr_state.pwrmgt_cntl.val), remapped_regs + mmPWRMGT_CNTL);
1164 }
1165
1166 /* Set system clock source to XTAL whilst adjusting the PLL! */
1167 w100_pwr_state.sclk_cntl.f.sclk_src_sel = CLK_SRC_XTAL;
1168 writel((u32) (w100_pwr_state.sclk_cntl.val), remapped_regs + mmSCLK_CNTL);
1169
1170 w100_pwr_state.pll_ref_fb_div.f.pll_ref_div = pll->M;
1171 w100_pwr_state.pll_ref_fb_div.f.pll_fb_div_int = pll->N_int;
1172 w100_pwr_state.pll_ref_fb_div.f.pll_fb_div_frac = pll->N_fac;
1173 w100_pwr_state.pll_ref_fb_div.f.pll_lock_time = pll->lock_time;
1174 writel((u32) (w100_pwr_state.pll_ref_fb_div.val), remapped_regs + mmPLL_REF_FB_DIV);
1175
1176 w100_pwr_state.pwrmgt_cntl.f.pwm_mode_req = 0;
1177 writel((u32) (w100_pwr_state.pwrmgt_cntl.val), remapped_regs + mmPWRMGT_CNTL);
1178
1179 status = w100_pll_calibration(pll);
1180
1181 if (w100_pwr_state.auto_mode == 1) /* auto mode */
1182 {
1183 w100_pwr_state.pwrmgt_cntl.f.pwm_fast_noml_hw_en = 0x1; /* reenable fast to normal */
1184 w100_pwr_state.pwrmgt_cntl.f.pwm_noml_fast_hw_en = 0x1; /* reenable normal to fast */
1185 writel((u32) (w100_pwr_state.pwrmgt_cntl.val), remapped_regs + mmPWRMGT_CNTL);
1186 }
1187 return status;
1188 }
1189
1190 /* freq = target frequency of the PLL */
1191 static int w100_set_pll_freq(struct w100fb_par *par, unsigned int freq)
1192 {
1193 struct w100_pll_info *pll = par->pll_table;
1194
1195 do {
1196 if (freq == pll->freq) {
1197 return w100_pll_set_clk(pll);
1198 }
1199 pll++;
1200 } while(pll->freq);
1201 return 0;
1202 }
1203
1204 /* Set up an initial state. Some values/fields set
1205 here will be overwritten. */
1206 static void w100_pwm_setup(struct w100fb_par *par)
1207 {
1208 w100_pwr_state.clk_pin_cntl.f.osc_en = 0x1;
1209 w100_pwr_state.clk_pin_cntl.f.osc_gain = 0x1f;
1210 w100_pwr_state.clk_pin_cntl.f.dont_use_xtalin = 0x0;
1211 w100_pwr_state.clk_pin_cntl.f.xtalin_pm_en = 0x0;
1212 w100_pwr_state.clk_pin_cntl.f.xtalin_dbl_en = par->mach->xtal_dbl ? 1 : 0;
1213 w100_pwr_state.clk_pin_cntl.f.cg_debug = 0x0;
1214 writel((u32) (w100_pwr_state.clk_pin_cntl.val), remapped_regs + mmCLK_PIN_CNTL);
1215
1216 w100_pwr_state.sclk_cntl.f.sclk_src_sel = CLK_SRC_XTAL;
1217 w100_pwr_state.sclk_cntl.f.sclk_post_div_fast = 0x0; /* Pfast = 1 */
1218 w100_pwr_state.sclk_cntl.f.sclk_clkon_hys = 0x3;
1219 w100_pwr_state.sclk_cntl.f.sclk_post_div_slow = 0x0; /* Pslow = 1 */
1220 w100_pwr_state.sclk_cntl.f.disp_cg_ok2switch_en = 0x0;
1221 w100_pwr_state.sclk_cntl.f.sclk_force_reg = 0x0; /* Dynamic */
1222 w100_pwr_state.sclk_cntl.f.sclk_force_disp = 0x0; /* Dynamic */
1223 w100_pwr_state.sclk_cntl.f.sclk_force_mc = 0x0; /* Dynamic */
1224 w100_pwr_state.sclk_cntl.f.sclk_force_extmc = 0x0; /* Dynamic */
1225 w100_pwr_state.sclk_cntl.f.sclk_force_cp = 0x0; /* Dynamic */
1226 w100_pwr_state.sclk_cntl.f.sclk_force_e2 = 0x0; /* Dynamic */
1227 w100_pwr_state.sclk_cntl.f.sclk_force_e3 = 0x0; /* Dynamic */
1228 w100_pwr_state.sclk_cntl.f.sclk_force_idct = 0x0; /* Dynamic */
1229 w100_pwr_state.sclk_cntl.f.sclk_force_bist = 0x0; /* Dynamic */
1230 w100_pwr_state.sclk_cntl.f.busy_extend_cp = 0x0;
1231 w100_pwr_state.sclk_cntl.f.busy_extend_e2 = 0x0;
1232 w100_pwr_state.sclk_cntl.f.busy_extend_e3 = 0x0;
1233 w100_pwr_state.sclk_cntl.f.busy_extend_idct = 0x0;
1234 writel((u32) (w100_pwr_state.sclk_cntl.val), remapped_regs + mmSCLK_CNTL);
1235
1236 w100_pwr_state.pclk_cntl.f.pclk_src_sel = CLK_SRC_XTAL;
1237 w100_pwr_state.pclk_cntl.f.pclk_post_div = 0x1; /* P = 2 */
1238 w100_pwr_state.pclk_cntl.f.pclk_force_disp = 0x0; /* Dynamic */
1239 writel((u32) (w100_pwr_state.pclk_cntl.val), remapped_regs + mmPCLK_CNTL);
1240
1241 w100_pwr_state.pll_ref_fb_div.f.pll_ref_div = 0x0; /* M = 1 */
1242 w100_pwr_state.pll_ref_fb_div.f.pll_fb_div_int = 0x0; /* N = 1.0 */
1243 w100_pwr_state.pll_ref_fb_div.f.pll_fb_div_frac = 0x0;
1244 w100_pwr_state.pll_ref_fb_div.f.pll_reset_time = 0x5;
1245 w100_pwr_state.pll_ref_fb_div.f.pll_lock_time = 0xff;
1246 writel((u32) (w100_pwr_state.pll_ref_fb_div.val), remapped_regs + mmPLL_REF_FB_DIV);
1247
1248 w100_pwr_state.pll_cntl.f.pll_pwdn = 0x1;
1249 w100_pwr_state.pll_cntl.f.pll_reset = 0x1;
1250 w100_pwr_state.pll_cntl.f.pll_pm_en = 0x0;
1251 w100_pwr_state.pll_cntl.f.pll_mode = 0x0; /* uses VCO clock */
1252 w100_pwr_state.pll_cntl.f.pll_refclk_sel = 0x0;
1253 w100_pwr_state.pll_cntl.f.pll_fbclk_sel = 0x0;
1254 w100_pwr_state.pll_cntl.f.pll_tcpoff = 0x0;
1255 w100_pwr_state.pll_cntl.f.pll_pcp = 0x4;
1256 w100_pwr_state.pll_cntl.f.pll_pvg = 0x0;
1257 w100_pwr_state.pll_cntl.f.pll_vcofr = 0x0;
1258 w100_pwr_state.pll_cntl.f.pll_ioffset = 0x0;
1259 w100_pwr_state.pll_cntl.f.pll_pecc_mode = 0x0;
1260 w100_pwr_state.pll_cntl.f.pll_pecc_scon = 0x0;
1261 w100_pwr_state.pll_cntl.f.pll_dactal = 0x0; /* Hi-Z */
1262 w100_pwr_state.pll_cntl.f.pll_cp_clip = 0x3;
1263 w100_pwr_state.pll_cntl.f.pll_conf = 0x2;
1264 w100_pwr_state.pll_cntl.f.pll_mbctrl = 0x2;
1265 w100_pwr_state.pll_cntl.f.pll_ring_off = 0x0;
1266 writel((u32) (w100_pwr_state.pll_cntl.val), remapped_regs + mmPLL_CNTL);
1267
1268 w100_pwr_state.pwrmgt_cntl.f.pwm_enable = 0x0;
1269 w100_pwr_state.pwrmgt_cntl.f.pwm_mode_req = 0x1; /* normal mode (0, 1, 3) */
1270 w100_pwr_state.pwrmgt_cntl.f.pwm_wakeup_cond = 0x0;
1271 w100_pwr_state.pwrmgt_cntl.f.pwm_fast_noml_hw_en = 0x0;
1272 w100_pwr_state.pwrmgt_cntl.f.pwm_noml_fast_hw_en = 0x0;
1273 w100_pwr_state.pwrmgt_cntl.f.pwm_fast_noml_cond = 0x1; /* PM4,ENG */
1274 w100_pwr_state.pwrmgt_cntl.f.pwm_noml_fast_cond = 0x1; /* PM4,ENG */
1275 w100_pwr_state.pwrmgt_cntl.f.pwm_idle_timer = 0xFF;
1276 w100_pwr_state.pwrmgt_cntl.f.pwm_busy_timer = 0xFF;
1277 writel((u32) (w100_pwr_state.pwrmgt_cntl.val), remapped_regs + mmPWRMGT_CNTL);
1278
1279 w100_pwr_state.auto_mode = 0; /* manual mode */
1280 }
1281
1282
1283 /*
1284 * Setup the w100 clocks for the specified mode
1285 */
1286 static void w100_init_clocks(struct w100fb_par *par)
1287 {
1288 struct w100_mode *mode = par->mode;
1289
1290 if (mode->pixclk_src == CLK_SRC_PLL || mode->sysclk_src == CLK_SRC_PLL)
1291 w100_set_pll_freq(par, (par->fastpll_mode && mode->fast_pll_freq) ? mode->fast_pll_freq : mode->pll_freq);
1292
1293 w100_pwr_state.sclk_cntl.f.sclk_src_sel = mode->sysclk_src;
1294 w100_pwr_state.sclk_cntl.f.sclk_post_div_fast = mode->sysclk_divider;
1295 w100_pwr_state.sclk_cntl.f.sclk_post_div_slow = mode->sysclk_divider;
1296 writel((u32) (w100_pwr_state.sclk_cntl.val), remapped_regs + mmSCLK_CNTL);
1297 }
1298
1299 static void w100_init_lcd(struct w100fb_par *par)
1300 {
1301 u32 temp32;
1302 struct w100_mode *mode = par->mode;
1303 struct w100_gen_regs *regs = par->mach->regs;
1304 union active_h_disp_u active_h_disp;
1305 union active_v_disp_u active_v_disp;
1306 union graphic_h_disp_u graphic_h_disp;
1307 union graphic_v_disp_u graphic_v_disp;
1308 union crtc_total_u crtc_total;
1309
1310 /* w3200 doesn't like undefined bits being set so zero register values first */
1311
1312 active_h_disp.val = 0;
1313 active_h_disp.f.active_h_start=mode->left_margin;
1314 active_h_disp.f.active_h_end=mode->left_margin + mode->xres;
1315 writel(active_h_disp.val, remapped_regs + mmACTIVE_H_DISP);
1316
1317 active_v_disp.val = 0;
1318 active_v_disp.f.active_v_start=mode->upper_margin;
1319 active_v_disp.f.active_v_end=mode->upper_margin + mode->yres;
1320 writel(active_v_disp.val, remapped_regs + mmACTIVE_V_DISP);
1321
1322 graphic_h_disp.val = 0;
1323 graphic_h_disp.f.graphic_h_start=mode->left_margin;
1324 graphic_h_disp.f.graphic_h_end=mode->left_margin + mode->xres;
1325 writel(graphic_h_disp.val, remapped_regs + mmGRAPHIC_H_DISP);
1326
1327 graphic_v_disp.val = 0;
1328 graphic_v_disp.f.graphic_v_start=mode->upper_margin;
1329 graphic_v_disp.f.graphic_v_end=mode->upper_margin + mode->yres;
1330 writel(graphic_v_disp.val, remapped_regs + mmGRAPHIC_V_DISP);
1331
1332 crtc_total.val = 0;
1333 crtc_total.f.crtc_h_total=mode->left_margin + mode->xres + mode->right_margin;
1334 crtc_total.f.crtc_v_total=mode->upper_margin + mode->yres + mode->lower_margin;
1335 writel(crtc_total.val, remapped_regs + mmCRTC_TOTAL);
1336
1337 writel(mode->crtc_ss, remapped_regs + mmCRTC_SS);
1338 writel(mode->crtc_ls, remapped_regs + mmCRTC_LS);
1339 writel(mode->crtc_gs, remapped_regs + mmCRTC_GS);
1340 writel(mode->crtc_vpos_gs, remapped_regs + mmCRTC_VPOS_GS);
1341 writel(mode->crtc_rev, remapped_regs + mmCRTC_REV);
1342 writel(mode->crtc_dclk, remapped_regs + mmCRTC_DCLK);
1343 writel(mode->crtc_gclk, remapped_regs + mmCRTC_GCLK);
1344 writel(mode->crtc_goe, remapped_regs + mmCRTC_GOE);
1345 writel(mode->crtc_ps1_active, remapped_regs + mmCRTC_PS1_ACTIVE);
1346
1347 writel(regs->lcd_format, remapped_regs + mmLCD_FORMAT);
1348 writel(regs->lcdd_cntl1, remapped_regs + mmLCDD_CNTL1);
1349 writel(regs->lcdd_cntl2, remapped_regs + mmLCDD_CNTL2);
1350 writel(regs->genlcd_cntl1, remapped_regs + mmGENLCD_CNTL1);
1351 writel(regs->genlcd_cntl2, remapped_regs + mmGENLCD_CNTL2);
1352 writel(regs->genlcd_cntl3, remapped_regs + mmGENLCD_CNTL3);
1353
1354 writel(0x00000000, remapped_regs + mmCRTC_FRAME);
1355 writel(0x00000000, remapped_regs + mmCRTC_FRAME_VPOS);
1356 writel(0x00000000, remapped_regs + mmCRTC_DEFAULT_COUNT);
1357 writel(0x0000FF00, remapped_regs + mmLCD_BACKGROUND_COLOR);
1358
1359 /* Hack for overlay in ext memory */
1360 temp32 = readl(remapped_regs + mmDISP_DEBUG2);
1361 temp32 |= 0xc0000000;
1362 writel(temp32, remapped_regs + mmDISP_DEBUG2);
1363 }
1364
1365
1366 static void w100_setup_memory(struct w100fb_par *par)
1367 {
1368 union mc_ext_mem_location_u extmem_location;
1369 union mc_fb_location_u intmem_location;
1370 struct w100_mem_info *mem = par->mach->mem;
1371 struct w100_bm_mem_info *bm_mem = par->mach->bm_mem;
1372
1373 if (!par->extmem_active) {
1374 w100_suspend(W100_SUSPEND_EXTMEM);
1375
1376 /* Map Internal Memory at FB Base */
1377 intmem_location.f.mc_fb_start = W100_FB_BASE >> 8;
1378 intmem_location.f.mc_fb_top = (W100_FB_BASE+MEM_INT_SIZE) >> 8;
1379 writel((u32) (intmem_location.val), remapped_regs + mmMC_FB_LOCATION);
1380
1381 /* Unmap External Memory - value is *probably* irrelevant but may have meaning
1382 to acceleration libraries */
1383 extmem_location.f.mc_ext_mem_start = MEM_EXT_BASE_VALUE >> 8;
1384 extmem_location.f.mc_ext_mem_top = (MEM_EXT_BASE_VALUE-1) >> 8;
1385 writel((u32) (extmem_location.val), remapped_regs + mmMC_EXT_MEM_LOCATION);
1386 } else {
1387 /* Map Internal Memory to its default location */
1388 intmem_location.f.mc_fb_start = MEM_INT_BASE_VALUE >> 8;
1389 intmem_location.f.mc_fb_top = (MEM_INT_BASE_VALUE+MEM_INT_SIZE) >> 8;
1390 writel((u32) (intmem_location.val), remapped_regs + mmMC_FB_LOCATION);
1391
1392 /* Map External Memory at FB Base */
1393 extmem_location.f.mc_ext_mem_start = W100_FB_BASE >> 8;
1394 extmem_location.f.mc_ext_mem_top = (W100_FB_BASE+par->mach->mem->size) >> 8;
1395 writel((u32) (extmem_location.val), remapped_regs + mmMC_EXT_MEM_LOCATION);
1396
1397 writel(0x00007800, remapped_regs + mmMC_BIST_CTRL);
1398 writel(mem->ext_cntl, remapped_regs + mmMEM_EXT_CNTL);
1399 writel(0x00200021, remapped_regs + mmMEM_SDRAM_MODE_REG);
1400 udelay(100);
1401 writel(0x80200021, remapped_regs + mmMEM_SDRAM_MODE_REG);
1402 udelay(100);
1403 writel(mem->sdram_mode_reg, remapped_regs + mmMEM_SDRAM_MODE_REG);
1404 udelay(100);
1405 writel(mem->ext_timing_cntl, remapped_regs + mmMEM_EXT_TIMING_CNTL);
1406 writel(mem->io_cntl, remapped_regs + mmMEM_IO_CNTL);
1407 if (bm_mem) {
1408 writel(bm_mem->ext_mem_bw, remapped_regs + mmBM_EXT_MEM_BANDWIDTH);
1409 writel(bm_mem->offset, remapped_regs + mmBM_OFFSET);
1410 writel(bm_mem->ext_timing_ctl, remapped_regs + mmBM_MEM_EXT_TIMING_CNTL);
1411 writel(bm_mem->ext_cntl, remapped_regs + mmBM_MEM_EXT_CNTL);
1412 writel(bm_mem->mode_reg, remapped_regs + mmBM_MEM_MODE_REG);
1413 writel(bm_mem->io_cntl, remapped_regs + mmBM_MEM_IO_CNTL);
1414 writel(bm_mem->config, remapped_regs + mmBM_CONFIG);
1415 }
1416 }
1417 }
1418
1419 static void w100_set_dispregs(struct w100fb_par *par)
1420 {
1421 unsigned long rot=0, divider, offset=0;
1422 union graphic_ctrl_u graphic_ctrl;
1423
1424 /* See if the mode has been rotated */
1425 if (par->xres == par->mode->xres) {
1426 if (par->flip) {
1427 rot=3; /* 180 degree */
1428 offset=(par->xres * par->yres) - 1;
1429 } /* else 0 degree */
1430 divider = par->mode->pixclk_divider;
1431 } else {
1432 if (par->flip) {
1433 rot=2; /* 270 degree */
1434 offset=par->xres - 1;
1435 } else {
1436 rot=1; /* 90 degree */
1437 offset=par->xres * (par->yres - 1);
1438 }
1439 divider = par->mode->pixclk_divider_rotated;
1440 }
1441
1442 graphic_ctrl.val = 0; /* w32xx doesn't like undefined bits */
1443 switch (par->chip_id) {
1444 case CHIP_ID_W100:
1445 graphic_ctrl.f_w100.color_depth=6;
1446 graphic_ctrl.f_w100.en_crtc=1;
1447 graphic_ctrl.f_w100.en_graphic_req=1;
1448 graphic_ctrl.f_w100.en_graphic_crtc=1;
1449 graphic_ctrl.f_w100.lcd_pclk_on=1;
1450 graphic_ctrl.f_w100.lcd_sclk_on=1;
1451 graphic_ctrl.f_w100.low_power_on=0;
1452 graphic_ctrl.f_w100.req_freq=0;
1453 graphic_ctrl.f_w100.portrait_mode=rot;
1454
1455 /* Zaurus needs this */
1456 switch(par->xres) {
1457 case 240:
1458 case 320:
1459 default:
1460 graphic_ctrl.f_w100.total_req_graphic=0xa0;
1461 break;
1462 case 480:
1463 case 640:
1464 switch(rot) {
1465 case 0: /* 0 */
1466 case 3: /* 180 */
1467 graphic_ctrl.f_w100.low_power_on=1;
1468 graphic_ctrl.f_w100.req_freq=5;
1469 break;
1470 case 1: /* 90 */
1471 case 2: /* 270 */
1472 graphic_ctrl.f_w100.req_freq=4;
1473 break;
1474 default:
1475 break;
1476 }
1477 graphic_ctrl.f_w100.total_req_graphic=0xf0;
1478 break;
1479 }
1480 break;
1481 case CHIP_ID_W3200:
1482 case CHIP_ID_W3220:
1483 graphic_ctrl.f_w32xx.color_depth=6;
1484 graphic_ctrl.f_w32xx.en_crtc=1;
1485 graphic_ctrl.f_w32xx.en_graphic_req=1;
1486 graphic_ctrl.f_w32xx.en_graphic_crtc=1;
1487 graphic_ctrl.f_w32xx.lcd_pclk_on=1;
1488 graphic_ctrl.f_w32xx.lcd_sclk_on=1;
1489 graphic_ctrl.f_w32xx.low_power_on=0;
1490 graphic_ctrl.f_w32xx.req_freq=0;
1491 graphic_ctrl.f_w32xx.total_req_graphic=par->mode->xres >> 1; /* panel xres, not mode */
1492 graphic_ctrl.f_w32xx.portrait_mode=rot;
1493 break;
1494 }
1495
1496 /* Set the pixel clock source and divider */
1497 w100_pwr_state.pclk_cntl.f.pclk_src_sel = par->mode->pixclk_src;
1498 w100_pwr_state.pclk_cntl.f.pclk_post_div = divider;
1499 writel((u32) (w100_pwr_state.pclk_cntl.val), remapped_regs + mmPCLK_CNTL);
1500
1501 writel(graphic_ctrl.val, remapped_regs + mmGRAPHIC_CTRL);
1502 writel(W100_FB_BASE + ((offset * BITS_PER_PIXEL/8)&~0x03UL), remapped_regs + mmGRAPHIC_OFFSET);
1503 writel((par->xres*BITS_PER_PIXEL/8), remapped_regs + mmGRAPHIC_PITCH);
1504 }
1505
1506
1507 /*
1508 * Work out how long the sync pulse lasts
1509 * Value is 1/(time in seconds)
1510 */
1511 static void calc_hsync(struct w100fb_par *par)
1512 {
1513 unsigned long hsync;
1514 struct w100_mode *mode = par->mode;
1515 union crtc_ss_u crtc_ss;
1516
1517 if (mode->pixclk_src == CLK_SRC_XTAL)
1518 hsync=par->mach->xtal_freq;
1519 else
1520 hsync=((par->fastpll_mode && mode->fast_pll_freq) ? mode->fast_pll_freq : mode->pll_freq)*100000;
1521
1522 hsync /= (w100_pwr_state.pclk_cntl.f.pclk_post_div + 1);
1523
1524 crtc_ss.val = readl(remapped_regs + mmCRTC_SS);
1525 if (crtc_ss.val)
1526 par->hsync_len = hsync / (crtc_ss.f.ss_end-crtc_ss.f.ss_start);
1527 else
1528 par->hsync_len = 0;
1529 }
1530
1531 static void w100_suspend(u32 mode)
1532 {
1533 u32 val;
1534
1535 writel(0x7FFF8000, remapped_regs + mmMC_EXT_MEM_LOCATION);
1536 writel(0x00FF0000, remapped_regs + mmMC_PERF_MON_CNTL);
1537
1538 val = readl(remapped_regs + mmMEM_EXT_TIMING_CNTL);
1539 val &= ~(0x00100000); /* bit20=0 */
1540 val |= 0xFF000000; /* bit31:24=0xff */
1541 writel(val, remapped_regs + mmMEM_EXT_TIMING_CNTL);
1542
1543 val = readl(remapped_regs + mmMEM_EXT_CNTL);
1544 val &= ~(0x00040000); /* bit18=0 */
1545 val |= 0x00080000; /* bit19=1 */
1546 writel(val, remapped_regs + mmMEM_EXT_CNTL);
1547
1548 udelay(1); /* wait 1us */
1549
1550 if (mode == W100_SUSPEND_EXTMEM) {
1551 /* CKE: Tri-State */
1552 val = readl(remapped_regs + mmMEM_EXT_CNTL);
1553 val |= 0x40000000; /* bit30=1 */
1554 writel(val, remapped_regs + mmMEM_EXT_CNTL);
1555
1556 /* CLK: Stop */
1557 val = readl(remapped_regs + mmMEM_EXT_CNTL);
1558 val &= ~(0x00000001); /* bit0=0 */
1559 writel(val, remapped_regs + mmMEM_EXT_CNTL);
1560 } else {
1561 writel(0x00000000, remapped_regs + mmSCLK_CNTL);
1562 writel(0x000000BF, remapped_regs + mmCLK_PIN_CNTL);
1563 writel(0x00000015, remapped_regs + mmPWRMGT_CNTL);
1564
1565 udelay(5);
1566
1567 val = readl(remapped_regs + mmPLL_CNTL);
1568 val |= 0x00000004; /* bit2=1 */
1569 writel(val, remapped_regs + mmPLL_CNTL);
1570 writel(0x0000001d, remapped_regs + mmPWRMGT_CNTL);
1571 }
1572 }
1573
1574 static void w100_vsync(void)
1575 {
1576 u32 tmp;
1577 int timeout = 30000; /* VSync timeout = 30[ms] > 16.8[ms] */
1578
1579 tmp = readl(remapped_regs + mmACTIVE_V_DISP);
1580
1581 /* set vline pos */
1582 writel((tmp >> 16) & 0x3ff, remapped_regs + mmDISP_INT_CNTL);
1583
1584 /* disable vline irq */
1585 tmp = readl(remapped_regs + mmGEN_INT_CNTL);
1586
1587 tmp &= ~0x00000002;
1588 writel(tmp, remapped_regs + mmGEN_INT_CNTL);
1589
1590 /* clear vline irq status */
1591 writel(0x00000002, remapped_regs + mmGEN_INT_STATUS);
1592
1593 /* enable vline irq */
1594 writel((tmp | 0x00000002), remapped_regs + mmGEN_INT_CNTL);
1595
1596 /* clear vline irq status */
1597 writel(0x00000002, remapped_regs + mmGEN_INT_STATUS);
1598
1599 while(timeout > 0) {
1600 if (readl(remapped_regs + mmGEN_INT_STATUS) & 0x00000002)
1601 break;
1602 udelay(1);
1603 timeout--;
1604 }
1605
1606 /* disable vline irq */
1607 writel(tmp, remapped_regs + mmGEN_INT_CNTL);
1608
1609 /* clear vline irq status */
1610 writel(0x00000002, remapped_regs + mmGEN_INT_STATUS);
1611 }
1612
1613 static struct platform_driver w100fb_driver = {
1614 .probe = w100fb_probe,
1615 .remove = __devexit_p(w100fb_remove),
1616 .suspend = w100fb_suspend,
1617 .resume = w100fb_resume,
1618 .driver = {
1619 .name = "w100fb",
1620 },
1621 };
1622
1623 module_platform_driver(w100fb_driver);
1624
1625 MODULE_DESCRIPTION("ATI Imageon w100 framebuffer driver");
1626 MODULE_LICENSE("GPL");