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KVM: x86 emulator: whitespace cleanups
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / fb-puv3.c
blob27f2c57e06e9f0225f8132f5a93ce7022ba81183
1 /*
2 * Frame Buffer Driver for PKUnity-v3 Unigfx
3 * Code specific to PKUnity SoC and UniCore ISA
4 *
5 * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
6 * Copyright (C) 2001-2010 Guan Xuetao
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/errno.h>
16 #include <linux/platform_device.h>
17 #include <linux/clk.h>
18 #include <linux/fb.h>
19 #include <linux/init.h>
20 #include <linux/console.h>
21
22 #include <asm/sizes.h>
23 #include <mach/hardware.h>
24
25 /* Platform_data reserved for unifb registers. */
26 #define UNIFB_REGS_NUM 10
27 /* RAM reserved for the frame buffer. */
28 #define UNIFB_MEMSIZE (SZ_4M) /* 4 MB for 1024*768*32b */
29
30 /*
31 * cause UNIGFX don not have EDID
32 * all the modes are organized as follow
33 */
34 static const struct fb_videomode unifb_modes[] = {
35 /* 0 640x480-60 VESA */
36 { "640x480@60", 60, 640, 480, 25175000, 48, 16, 34, 10, 96, 1,
37 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
38 /* 1 640x480-75 VESA */
39 { "640x480@75", 75, 640, 480, 31500000, 120, 16, 18, 1, 64, 1,
40 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
41 /* 2 800x600-60 VESA */
42 { "800x600@60", 60, 800, 600, 40000000, 88, 40, 26, 1, 128, 1,
43 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
44 /* 3 800x600-75 VESA */
45 { "800x600@75", 75, 800, 600, 49500000, 160, 16, 23, 1, 80, 1,
46 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
47 /* 4 1024x768-60 VESA */
48 { "1024x768@60", 60, 1024, 768, 65000000, 160, 24, 34, 3, 136, 1,
49 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
50 /* 5 1024x768-75 VESA */
51 { "1024x768@75", 75, 1024, 768, 78750000, 176, 16, 30, 1, 96, 1,
52 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
53 /* 6 1280x960-60 VESA */
54 { "1280x960@60", 60, 1280, 960, 108000000, 312, 96, 38, 1, 112, 1,
55 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
56 /* 7 1440x900-60 VESA */
57 { "1440x900@60", 60, 1440, 900, 106500000, 232, 80, 30, 3, 152, 1,
58 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
59 /* 8 FIXME 9 1024x600-60 VESA UNTESTED */
60 { "1024x600@60", 60, 1024, 600, 50650000, 160, 24, 26, 1, 136, 1,
61 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
62 /* 9 FIXME 10 1024x600-75 VESA UNTESTED */
63 { "1024x600@75", 75, 1024, 600, 61500000, 176, 16, 23, 1, 96, 1,
64 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
65 /* 10 FIXME 11 1366x768-60 VESA UNTESTED */
66 { "1366x768@60", 60, 1366, 768, 85500000, 256, 58, 18, 1, 112, 3,
67 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
68 };
69
70 static struct fb_var_screeninfo unifb_default = {
71 .xres = 640,
72 .yres = 480,
73 .xres_virtual = 640,
74 .yres_virtual = 480,
75 .bits_per_pixel = 16,
76 .red = { 11, 5, 0 },
77 .green = { 5, 6, 0 },
78 .blue = { 0, 5, 0 },
79 .activate = FB_ACTIVATE_NOW,
80 .height = -1,
81 .width = -1,
82 .pixclock = 25175000,
83 .left_margin = 48,
84 .right_margin = 16,
85 .upper_margin = 33,
86 .lower_margin = 10,
87 .hsync_len = 96,
88 .vsync_len = 2,
89 .vmode = FB_VMODE_NONINTERLACED,
90 };
91
92 static struct fb_fix_screeninfo unifb_fix = {
93 .id = "UNIGFX FB",
94 .type = FB_TYPE_PACKED_PIXELS,
95 .visual = FB_VISUAL_TRUECOLOR,
96 .xpanstep = 1,
97 .ypanstep = 1,
98 .ywrapstep = 1,
99 .accel = FB_ACCEL_NONE,
100 };
101
102 static void unifb_sync(struct fb_info *info)
103 {
104 /* TODO: may, this can be replaced by interrupt */
105 int cnt;
106
107 for (cnt = 0; cnt < 0x10000000; cnt++) {
108 if (readl(UGE_COMMAND) & 0x1000000)
109 return;
110 }
111
112 if (cnt > 0x8000000)
113 dev_warn(info->device, "Warning: UniGFX GE time out ...\n");
114 }
115
116 static void unifb_prim_fillrect(struct fb_info *info,
117 const struct fb_fillrect *region)
118 {
119 int awidth = region->width;
120 int aheight = region->height;
121 int m_iBpp = info->var.bits_per_pixel;
122 int screen_width = info->var.xres;
123 int src_sel = 1; /* from fg_color */
124 int pat_sel = 1;
125 int src_x0 = 0;
126 int dst_x0 = region->dx;
127 int src_y0 = 0;
128 int dst_y0 = region->dy;
129 int rop_alpha_sel = 0;
130 int rop_alpha_code = 0xCC;
131 int x_dir = 1;
132 int y_dir = 1;
133 int alpha_r = 0;
134 int alpha_sel = 0;
135 int dst_pitch = screen_width * (m_iBpp / 8);
136 int dst_offset = dst_y0 * dst_pitch + dst_x0 * (m_iBpp / 8);
137 int src_pitch = screen_width * (m_iBpp / 8);
138 int src_offset = src_y0 * src_pitch + src_x0 * (m_iBpp / 8);
139 unsigned int command = 0;
140 int clip_region = 0;
141 int clip_en = 0;
142 int tp_en = 0;
143 int fg_color = 0;
144 int bottom = info->var.yres - 1;
145 int right = info->var.xres - 1;
146 int top = 0;
147
148 bottom = (bottom << 16) | right;
149 command = (rop_alpha_sel << 26) | (pat_sel << 18) | (src_sel << 16)
150 | (x_dir << 20) | (y_dir << 21) | (command << 24)
151 | (clip_region << 23) | (clip_en << 22) | (tp_en << 27);
152 src_pitch = (dst_pitch << 16) | src_pitch;
153 awidth = awidth | (aheight << 16);
154 alpha_r = ((rop_alpha_code & 0xff) << 8) | (alpha_r & 0xff)
155 | (alpha_sel << 16);
156 src_x0 = (src_x0 & 0x1fff) | ((src_y0 & 0x1fff) << 16);
157 dst_x0 = (dst_x0 & 0x1fff) | ((dst_y0 & 0x1fff) << 16);
158 fg_color = region->color;
159
160 unifb_sync(info);
161
162 writel(((u32 *)(info->pseudo_palette))[fg_color], UGE_FCOLOR);
163 writel(0, UGE_BCOLOR);
164 writel(src_pitch, UGE_PITCH);
165 writel(src_offset, UGE_SRCSTART);
166 writel(dst_offset, UGE_DSTSTART);
167 writel(awidth, UGE_WIDHEIGHT);
168 writel(top, UGE_CLIP0);
169 writel(bottom, UGE_CLIP1);
170 writel(alpha_r, UGE_ROPALPHA);
171 writel(src_x0, UGE_SRCXY);
172 writel(dst_x0, UGE_DSTXY);
173 writel(command, UGE_COMMAND);
174 }
175
176 static void unifb_fillrect(struct fb_info *info,
177 const struct fb_fillrect *region)
178 {
179 struct fb_fillrect modded;
180 int vxres, vyres;
181
182 if (info->flags & FBINFO_HWACCEL_DISABLED) {
183 sys_fillrect(info, region);
184 return;
185 }
186
187 vxres = info->var.xres_virtual;
188 vyres = info->var.yres_virtual;
189
190 memcpy(&modded, region, sizeof(struct fb_fillrect));
191
192 if (!modded.width || !modded.height ||
193 modded.dx >= vxres || modded.dy >= vyres)
194 return;
195
196 if (modded.dx + modded.width > vxres)
197 modded.width = vxres - modded.dx;
198 if (modded.dy + modded.height > vyres)
199 modded.height = vyres - modded.dy;
200
201 unifb_prim_fillrect(info, &modded);
202 }
203
204 static void unifb_prim_copyarea(struct fb_info *info,
205 const struct fb_copyarea *area)
206 {
207 int awidth = area->width;
208 int aheight = area->height;
209 int m_iBpp = info->var.bits_per_pixel;
210 int screen_width = info->var.xres;
211 int src_sel = 2; /* from mem */
212 int pat_sel = 0;
213 int src_x0 = area->sx;
214 int dst_x0 = area->dx;
215 int src_y0 = area->sy;
216 int dst_y0 = area->dy;
217
218 int rop_alpha_sel = 0;
219 int rop_alpha_code = 0xCC;
220 int x_dir = 1;
221 int y_dir = 1;
222
223 int alpha_r = 0;
224 int alpha_sel = 0;
225 int dst_pitch = screen_width * (m_iBpp / 8);
226 int dst_offset = dst_y0 * dst_pitch + dst_x0 * (m_iBpp / 8);
227 int src_pitch = screen_width * (m_iBpp / 8);
228 int src_offset = src_y0 * src_pitch + src_x0 * (m_iBpp / 8);
229 unsigned int command = 0;
230 int clip_region = 0;
231 int clip_en = 1;
232 int tp_en = 0;
233 int top = 0;
234 int bottom = info->var.yres;
235 int right = info->var.xres;
236 int fg_color = 0;
237 int bg_color = 0;
238
239 if (src_x0 < 0)
240 src_x0 = 0;
241 if (src_y0 < 0)
242 src_y0 = 0;
243
244 if (src_y0 - dst_y0 > 0) {
245 y_dir = 1;
246 } else {
247 y_dir = 0;
248 src_offset = (src_y0 + aheight) * src_pitch +
249 src_x0 * (m_iBpp / 8);
250 dst_offset = (dst_y0 + aheight) * dst_pitch +
251 dst_x0 * (m_iBpp / 8);
252 src_y0 += aheight;
253 dst_y0 += aheight;
254 }
255
256 command = (rop_alpha_sel << 26) | (pat_sel << 18) | (src_sel << 16) |
257 (x_dir << 20) | (y_dir << 21) | (command << 24) |
258 (clip_region << 23) | (clip_en << 22) | (tp_en << 27);
259 src_pitch = (dst_pitch << 16) | src_pitch;
260 awidth = awidth | (aheight << 16);
261 alpha_r = ((rop_alpha_code & 0xff) << 8) | (alpha_r & 0xff) |
262 (alpha_sel << 16);
263 src_x0 = (src_x0 & 0x1fff) | ((src_y0 & 0x1fff) << 16);
264 dst_x0 = (dst_x0 & 0x1fff) | ((dst_y0 & 0x1fff) << 16);
265 bottom = (bottom << 16) | right;
266
267 unifb_sync(info);
268
269 writel(src_pitch, UGE_PITCH);
270 writel(src_offset, UGE_SRCSTART);
271 writel(dst_offset, UGE_DSTSTART);
272 writel(awidth, UGE_WIDHEIGHT);
273 writel(top, UGE_CLIP0);
274 writel(bottom, UGE_CLIP1);
275 writel(bg_color, UGE_BCOLOR);
276 writel(fg_color, UGE_FCOLOR);
277 writel(alpha_r, UGE_ROPALPHA);
278 writel(src_x0, UGE_SRCXY);
279 writel(dst_x0, UGE_DSTXY);
280 writel(command, UGE_COMMAND);
281 }
282
283 static void unifb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
284 {
285 struct fb_copyarea modded;
286 u32 vxres, vyres;
287 modded.sx = area->sx;
288 modded.sy = area->sy;
289 modded.dx = area->dx;
290 modded.dy = area->dy;
291 modded.width = area->width;
292 modded.height = area->height;
293
294 if (info->flags & FBINFO_HWACCEL_DISABLED) {
295 sys_copyarea(info, area);
296 return;
297 }
298
299 vxres = info->var.xres_virtual;
300 vyres = info->var.yres_virtual;
301
302 if (!modded.width || !modded.height ||
303 modded.sx >= vxres || modded.sy >= vyres ||
304 modded.dx >= vxres || modded.dy >= vyres)
305 return;
306
307 if (modded.sx + modded.width > vxres)
308 modded.width = vxres - modded.sx;
309 if (modded.dx + modded.width > vxres)
310 modded.width = vxres - modded.dx;
311 if (modded.sy + modded.height > vyres)
312 modded.height = vyres - modded.sy;
313 if (modded.dy + modded.height > vyres)
314 modded.height = vyres - modded.dy;
315
316 unifb_prim_copyarea(info, &modded);
317 }
318
319 static void unifb_imageblit(struct fb_info *info, const struct fb_image *image)
320 {
321 sys_imageblit(info, image);
322 }
323
324 static u_long get_line_length(int xres_virtual, int bpp)
325 {
326 u_long length;
327
328 length = xres_virtual * bpp;
329 length = (length + 31) & ~31;
330 length >>= 3;
331 return length;
332 }
333
334 /*
335 * Setting the video mode has been split into two parts.
336 * First part, xxxfb_check_var, must not write anything
337 * to hardware, it should only verify and adjust var.
338 * This means it doesn't alter par but it does use hardware
339 * data from it to check this var.
340 */
341 static int unifb_check_var(struct fb_var_screeninfo *var,
342 struct fb_info *info)
343 {
344 u_long line_length;
345
346 /*
347 * FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal!
348 * as FB_VMODE_SMOOTH_XPAN is only used internally
349 */
350
351 if (var->vmode & FB_VMODE_CONUPDATE) {
352 var->vmode |= FB_VMODE_YWRAP;
353 var->xoffset = info->var.xoffset;
354 var->yoffset = info->var.yoffset;
355 }
356
357 /*
358 * Some very basic checks
359 */
360 if (!var->xres)
361 var->xres = 1;
362 if (!var->yres)
363 var->yres = 1;
364 if (var->xres > var->xres_virtual)
365 var->xres_virtual = var->xres;
366 if (var->yres > var->yres_virtual)
367 var->yres_virtual = var->yres;
368 if (var->bits_per_pixel <= 1)
369 var->bits_per_pixel = 1;
370 else if (var->bits_per_pixel <= 8)
371 var->bits_per_pixel = 8;
372 else if (var->bits_per_pixel <= 16)
373 var->bits_per_pixel = 16;
374 else if (var->bits_per_pixel <= 24)
375 var->bits_per_pixel = 24;
376 else if (var->bits_per_pixel <= 32)
377 var->bits_per_pixel = 32;
378 else
379 return -EINVAL;
380
381 if (var->xres_virtual < var->xoffset + var->xres)
382 var->xres_virtual = var->xoffset + var->xres;
383 if (var->yres_virtual < var->yoffset + var->yres)
384 var->yres_virtual = var->yoffset + var->yres;
385
386 /*
387 * Memory limit
388 */
389 line_length =
390 get_line_length(var->xres_virtual, var->bits_per_pixel);
391 if (line_length * var->yres_virtual > UNIFB_MEMSIZE)
392 return -ENOMEM;
393
394 /*
395 * Now that we checked it we alter var. The reason being is that the
396 * video mode passed in might not work but slight changes to it might
397 * make it work. This way we let the user know what is acceptable.
398 */
399 switch (var->bits_per_pixel) {
400 case 1:
401 case 8:
402 var->red.offset = 0;
403 var->red.length = 8;
404 var->green.offset = 0;
405 var->green.length = 8;
406 var->blue.offset = 0;
407 var->blue.length = 8;
408 var->transp.offset = 0;
409 var->transp.length = 0;
410 break;
411 case 16: /* RGBA 5551 */
412 if (var->transp.length) {
413 var->red.offset = 0;
414 var->red.length = 5;
415 var->green.offset = 5;
416 var->green.length = 5;
417 var->blue.offset = 10;
418 var->blue.length = 5;
419 var->transp.offset = 15;
420 var->transp.length = 1;
421 } else { /* RGB 565 */
422 var->red.offset = 11;
423 var->red.length = 5;
424 var->green.offset = 5;
425 var->green.length = 6;
426 var->blue.offset = 0;
427 var->blue.length = 5;
428 var->transp.offset = 0;
429 var->transp.length = 0;
430 }
431 break;
432 case 24: /* RGB 888 */
433 var->red.offset = 0;
434 var->red.length = 8;
435 var->green.offset = 8;
436 var->green.length = 8;
437 var->blue.offset = 16;
438 var->blue.length = 8;
439 var->transp.offset = 0;
440 var->transp.length = 0;
441 break;
442 case 32: /* RGBA 8888 */
443 var->red.offset = 16;
444 var->red.length = 8;
445 var->green.offset = 8;
446 var->green.length = 8;
447 var->blue.offset = 0;
448 var->blue.length = 8;
449 var->transp.offset = 24;
450 var->transp.length = 8;
451 break;
452 }
453 var->red.msb_right = 0;
454 var->green.msb_right = 0;
455 var->blue.msb_right = 0;
456 var->transp.msb_right = 0;
457
458 return 0;
459 }
460
461 /*
462 * This routine actually sets the video mode. It's in here where we
463 * the hardware state info->par and fix which can be affected by the
464 * change in par. For this driver it doesn't do much.
465 */
466 static int unifb_set_par(struct fb_info *info)
467 {
468 int hTotal, vTotal, hSyncStart, hSyncEnd, vSyncStart, vSyncEnd;
469 int format;
470
471 #ifdef CONFIG_PUV3_PM
472 struct clk *clk_vga;
473 u32 pixclk = 0;
474 int i;
475
476 for (i = 0; i <= 10; i++) {
477 if (info->var.xres == unifb_modes[i].xres
478 && info->var.yres == unifb_modes[i].yres
479 && info->var.upper_margin == unifb_modes[i].upper_margin
480 && info->var.lower_margin == unifb_modes[i].lower_margin
481 && info->var.left_margin == unifb_modes[i].left_margin
482 && info->var.right_margin == unifb_modes[i].right_margin
483 && info->var.hsync_len == unifb_modes[i].hsync_len
484 && info->var.vsync_len == unifb_modes[i].vsync_len) {
485 pixclk = unifb_modes[i].pixclock;
486 break;
487 }
488 }
489
490 /* set clock rate */
491 clk_vga = clk_get(info->device, "VGA_CLK");
492 if (clk_vga == ERR_PTR(-ENOENT))
493 return -ENOENT;
494
495 if (pixclk != 0) {
496 if (clk_set_rate(clk_vga, pixclk)) { /* set clock failed */
497 info->fix = unifb_fix;
498 info->var = unifb_default;
499 if (clk_set_rate(clk_vga, unifb_default.pixclock))
500 return -EINVAL;
501 }
502 }
503 #endif
504
505 info->fix.line_length = get_line_length(info->var.xres_virtual,
506 info->var.bits_per_pixel);
507
508 hSyncStart = info->var.xres + info->var.right_margin;
509 hSyncEnd = hSyncStart + info->var.hsync_len;
510 hTotal = hSyncEnd + info->var.left_margin;
511
512 vSyncStart = info->var.yres + info->var.lower_margin;
513 vSyncEnd = vSyncStart + info->var.vsync_len;
514 vTotal = vSyncEnd + info->var.upper_margin;
515
516 switch (info->var.bits_per_pixel) {
517 case 8:
518 format = UDE_CFG_DST8;
519 break;
520 case 16:
521 format = UDE_CFG_DST16;
522 break;
523 case 24:
524 format = UDE_CFG_DST24;
525 break;
526 case 32:
527 format = UDE_CFG_DST32;
528 break;
529 default:
530 return -EINVAL;
531 }
532
533 writel(info->fix.smem_start, UDE_FSA);
534 writel(info->var.yres, UDE_LS);
535 writel(get_line_length(info->var.xres,
536 info->var.bits_per_pixel) >> 3, UDE_PS);
537 /* >> 3 for hardware required. */
538 writel((hTotal << 16) | (info->var.xres), UDE_HAT);
539 writel(((hTotal - 1) << 16) | (info->var.xres - 1), UDE_HBT);
540 writel(((hSyncEnd - 1) << 16) | (hSyncStart - 1), UDE_HST);
541 writel((vTotal << 16) | (info->var.yres), UDE_VAT);
542 writel(((vTotal - 1) << 16) | (info->var.yres - 1), UDE_VBT);
543 writel(((vSyncEnd - 1) << 16) | (vSyncStart - 1), UDE_VST);
544 writel(UDE_CFG_GDEN_ENABLE | UDE_CFG_TIMEUP_ENABLE
545 | format | 0xC0000001, UDE_CFG);
546
547 return 0;
548 }
549
550 /*
551 * Set a single color register. The values supplied are already
552 * rounded down to the hardware's capabilities (according to the
553 * entries in the var structure). Return != 0 for invalid regno.
554 */
555 static int unifb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
556 u_int transp, struct fb_info *info)
557 {
558 if (regno >= 256) /* no. of hw registers */
559 return 1;
560
561 /* grayscale works only partially under directcolor */
562 if (info->var.grayscale) {
563 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
564 red = green = blue =
565 (red * 77 + green * 151 + blue * 28) >> 8;
566 }
567
568 #define CNVT_TOHW(val, width) ((((val)<<(width))+0x7FFF-(val))>>16)
569 switch (info->fix.visual) {
570 case FB_VISUAL_TRUECOLOR:
571 case FB_VISUAL_PSEUDOCOLOR:
572 red = CNVT_TOHW(red, info->var.red.length);
573 green = CNVT_TOHW(green, info->var.green.length);
574 blue = CNVT_TOHW(blue, info->var.blue.length);
575 transp = CNVT_TOHW(transp, info->var.transp.length);
576 break;
577 case FB_VISUAL_DIRECTCOLOR:
578 red = CNVT_TOHW(red, 8); /* expect 8 bit DAC */
579 green = CNVT_TOHW(green, 8);
580 blue = CNVT_TOHW(blue, 8);
581 /* hey, there is bug in transp handling... */
582 transp = CNVT_TOHW(transp, 8);
583 break;
584 }
585 #undef CNVT_TOHW
586 /* Truecolor has hardware independent palette */
587 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
588 u32 v;
589
590 if (regno >= 16)
591 return 1;
592
593 v = (red << info->var.red.offset) |
594 (green << info->var.green.offset) |
595 (blue << info->var.blue.offset) |
596 (transp << info->var.transp.offset);
597 switch (info->var.bits_per_pixel) {
598 case 8:
599 break;
600 case 16:
601 case 24:
602 case 32:
603 ((u32 *) (info->pseudo_palette))[regno] = v;
604 break;
605 default:
606 return 1;
607 }
608 return 0;
609 }
610 return 0;
611 }
612
613 /*
614 * Pan or Wrap the Display
615 *
616 * This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
617 */
618 static int unifb_pan_display(struct fb_var_screeninfo *var,
619 struct fb_info *info)
620 {
621 if (var->vmode & FB_VMODE_YWRAP) {
622 if (var->yoffset < 0
623 || var->yoffset >= info->var.yres_virtual
624 || var->xoffset)
625 return -EINVAL;
626 } else {
627 if (var->xoffset + var->xres > info->var.xres_virtual ||
628 var->yoffset + var->yres > info->var.yres_virtual)
629 return -EINVAL;
630 }
631 info->var.xoffset = var->xoffset;
632 info->var.yoffset = var->yoffset;
633 if (var->vmode & FB_VMODE_YWRAP)
634 info->var.vmode |= FB_VMODE_YWRAP;
635 else
636 info->var.vmode &= ~FB_VMODE_YWRAP;
637 return 0;
638 }
639
640 int unifb_mmap(struct fb_info *info,
641 struct vm_area_struct *vma)
642 {
643 unsigned long size = vma->vm_end - vma->vm_start;
644 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
645 unsigned long pos = info->fix.smem_start + offset;
646
647 if (offset + size > info->fix.smem_len)
648 return -EINVAL;
649
650 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
651
652 if (io_remap_pfn_range(vma, vma->vm_start, pos >> PAGE_SHIFT, size,
653 vma->vm_page_prot))
654 return -EAGAIN;
655
656 vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
657 return 0;
658
659 }
660
661 static struct fb_ops unifb_ops = {
662 .fb_read = fb_sys_read,
663 .fb_write = fb_sys_write,
664 .fb_check_var = unifb_check_var,
665 .fb_set_par = unifb_set_par,
666 .fb_setcolreg = unifb_setcolreg,
667 .fb_pan_display = unifb_pan_display,
668 .fb_fillrect = unifb_fillrect,
669 .fb_copyarea = unifb_copyarea,
670 .fb_imageblit = unifb_imageblit,
671 .fb_mmap = unifb_mmap,
672 };
673
674 /*
675 * Initialisation
676 */
677 static int unifb_probe(struct platform_device *dev)
678 {
679 struct fb_info *info;
680 u32 unifb_regs[UNIFB_REGS_NUM];
681 int retval = -ENOMEM;
682 struct resource *iomem;
683 void *videomemory;
684
685 videomemory = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP,
686 get_order(UNIFB_MEMSIZE));
687 if (!videomemory)
688 goto err;
689
690 memset(videomemory, 0, UNIFB_MEMSIZE);
691
692 unifb_fix.smem_start = virt_to_phys(videomemory);
693 unifb_fix.smem_len = UNIFB_MEMSIZE;
694
695 iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
696 unifb_fix.mmio_start = iomem->start;
697
698 info = framebuffer_alloc(sizeof(u32)*256, &dev->dev);
699 if (!info)
700 goto err;
701
702 info->screen_base = (char __iomem *)videomemory;
703 info->fbops = &unifb_ops;
704
705 retval = fb_find_mode(&info->var, info, NULL,
706 unifb_modes, 10, &unifb_modes[0], 16);
707
708 if (!retval || (retval == 4))
709 info->var = unifb_default;
710
711 info->fix = unifb_fix;
712 info->pseudo_palette = info->par;
713 info->par = NULL;
714 info->flags = FBINFO_FLAG_DEFAULT;
715 #ifdef FB_ACCEL_PUV3_UNIGFX
716 info->fix.accel = FB_ACCEL_PUV3_UNIGFX;
717 #endif
718
719 retval = fb_alloc_cmap(&info->cmap, 256, 0);
720 if (retval < 0)
721 goto err1;
722
723 retval = register_framebuffer(info);
724 if (retval < 0)
725 goto err2;
726 platform_set_drvdata(dev, info);
727 platform_device_add_data(dev, unifb_regs, sizeof(u32) * UNIFB_REGS_NUM);
728
729 printk(KERN_INFO
730 "fb%d: Virtual frame buffer device, using %dM of video memory\n",
731 info->node, UNIFB_MEMSIZE >> 20);
732 return 0;
733 err2:
734 fb_dealloc_cmap(&info->cmap);
735 err1:
736 framebuffer_release(info);
737 err:
738 return retval;
739 }
740
741 static int unifb_remove(struct platform_device *dev)
742 {
743 struct fb_info *info = platform_get_drvdata(dev);
744
745 if (info) {
746 unregister_framebuffer(info);
747 fb_dealloc_cmap(&info->cmap);
748 framebuffer_release(info);
749 }
750 return 0;
751 }
752
753 #ifdef CONFIG_PM
754 static int unifb_resume(struct platform_device *dev)
755 {
756 int rc = 0;
757 u32 *unifb_regs = dev->dev.platform_data;
758
759 if (dev->dev.power.power_state.event == PM_EVENT_ON)
760 return 0;
761
762 console_lock();
763
764 if (dev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
765 writel(unifb_regs[0], UDE_FSA);
766 writel(unifb_regs[1], UDE_LS);
767 writel(unifb_regs[2], UDE_PS);
768 writel(unifb_regs[3], UDE_HAT);
769 writel(unifb_regs[4], UDE_HBT);
770 writel(unifb_regs[5], UDE_HST);
771 writel(unifb_regs[6], UDE_VAT);
772 writel(unifb_regs[7], UDE_VBT);
773 writel(unifb_regs[8], UDE_VST);
774 writel(unifb_regs[9], UDE_CFG);
775 }
776 dev->dev.power.power_state = PMSG_ON;
777
778 console_unlock();
779
780 return rc;
781 }
782
783 static int unifb_suspend(struct platform_device *dev, pm_message_t mesg)
784 {
785 u32 *unifb_regs = dev->dev.platform_data;
786
787 unifb_regs[0] = readl(UDE_FSA);
788 unifb_regs[1] = readl(UDE_LS);
789 unifb_regs[2] = readl(UDE_PS);
790 unifb_regs[3] = readl(UDE_HAT);
791 unifb_regs[4] = readl(UDE_HBT);
792 unifb_regs[5] = readl(UDE_HST);
793 unifb_regs[6] = readl(UDE_VAT);
794 unifb_regs[7] = readl(UDE_VBT);
795 unifb_regs[8] = readl(UDE_VST);
796 unifb_regs[9] = readl(UDE_CFG);
797
798 if (mesg.event == dev->dev.power.power_state.event)
799 return 0;
800
801 switch (mesg.event) {
802 case PM_EVENT_FREEZE: /* about to take snapshot */
803 case PM_EVENT_PRETHAW: /* before restoring snapshot */
804 goto done;
805 }
806
807 console_lock();
808
809 /* do nothing... */
810
811 console_unlock();
812
813 done:
814 dev->dev.power.power_state = mesg;
815
816 return 0;
817 }
818 #else
819 #define unifb_resume NULL
820 #define unifb_suspend NULL
821 #endif
822
823 static struct platform_driver unifb_driver = {
824 .probe = unifb_probe,
825 .remove = unifb_remove,
826 .resume = unifb_resume,
827 .suspend = unifb_suspend,
828 .driver = {
829 .name = "PKUnity-v3-UNIGFX",
830 },
831 };
832
833 static int __init unifb_init(void)
834 {
835 #ifndef MODULE
836 if (fb_get_options("unifb", NULL))
837 return -ENODEV;
838 #endif
839
840 return platform_driver_register(&unifb_driver);
841 }
842
843 module_init(unifb_init);
844
845 static void __exit unifb_exit(void)
846 {
847 platform_driver_unregister(&unifb_driver);
848 }
849
850 module_exit(unifb_exit);
851
852 MODULE_LICENSE("GPL v2");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree