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