1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Frame Buffer Driver for PKUnity-v3 Unigfx
4 * Code specific to PKUnity SoC and UniCore ISA
5 *
6 * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
7 * Copyright (C) 2001-2010 Guan Xuetao
8 */
9
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/errno.h>
13 #include <linux/platform_device.h>
14 #include <linux/clk.h>
15 #include <linux/fb.h>
16 #include <linux/init.h>
17 #include <linux/console.h>
18 #include <linux/mm.h>
19
20 #include <linux/sizes.h>
21 #include <asm/pgtable.h>
22 #include <mach/hardware.h>
23
24 /* Platform_data reserved for unifb registers. */
25 #define UNIFB_REGS_NUM 10
26 /* RAM reserved for the frame buffer. */
27 #define UNIFB_MEMSIZE (SZ_4M) /* 4 MB for 1024*768*32b */
28
29 /*
30 * cause UNIGFX don not have EDID
31 * all the modes are organized as follow
32 */
33 static const struct fb_videomode unifb_modes[] = {
34 /* 0 640x480-60 VESA */
35 { "640x480@60", 60, 640, 480, 25175000, 48, 16, 34, 10, 96, 1,
36 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
37 /* 1 640x480-75 VESA */
38 { "640x480@75", 75, 640, 480, 31500000, 120, 16, 18, 1, 64, 1,
39 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
40 /* 2 800x600-60 VESA */
41 { "800x600@60", 60, 800, 600, 40000000, 88, 40, 26, 1, 128, 1,
42 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
43 /* 3 800x600-75 VESA */
44 { "800x600@75", 75, 800, 600, 49500000, 160, 16, 23, 1, 80, 1,
45 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
46 /* 4 1024x768-60 VESA */
47 { "1024x768@60", 60, 1024, 768, 65000000, 160, 24, 34, 3, 136, 1,
48 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
49 /* 5 1024x768-75 VESA */
50 { "1024x768@75", 75, 1024, 768, 78750000, 176, 16, 30, 1, 96, 1,
51 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
52 /* 6 1280x960-60 VESA */
53 { "1280x960@60", 60, 1280, 960, 108000000, 312, 96, 38, 1, 112, 1,
54 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
55 /* 7 1440x900-60 VESA */
56 { "1440x900@60", 60, 1440, 900, 106500000, 232, 80, 30, 3, 152, 1,
57 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
58 /* 8 FIXME 9 1024x600-60 VESA UNTESTED */
59 { "1024x600@60", 60, 1024, 600, 50650000, 160, 24, 26, 1, 136, 1,
60 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
61 /* 9 FIXME 10 1024x600-75 VESA UNTESTED */
62 { "1024x600@75", 75, 1024, 600, 61500000, 176, 16, 23, 1, 96, 1,
63 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
64 /* 10 FIXME 11 1366x768-60 VESA UNTESTED */
65 { "1366x768@60", 60, 1366, 768, 85500000, 256, 58, 18, 1, 112, 3,
66 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
67 };
68
69 static const struct fb_var_screeninfo unifb_default = {
70 .xres = 640,
71 .yres = 480,
72 .xres_virtual = 640,
73 .yres_virtual = 480,
74 .bits_per_pixel = 16,
75 .red = { 11, 5, 0 },
76 .green = { 5, 6, 0 },
77 .blue = { 0, 5, 0 },
78 .activate = FB_ACTIVATE_NOW,
79 .height = -1,
80 .width = -1,
81 .pixclock = 25175000,
82 .left_margin = 48,
83 .right_margin = 16,
84 .upper_margin = 33,
85 .lower_margin = 10,
86 .hsync_len = 96,
87 .vsync_len = 2,
88 .vmode = FB_VMODE_NONINTERLACED,
89 };
90
91 static struct fb_fix_screeninfo unifb_fix = {
92 .id = "UNIGFX FB",
93 .type = FB_TYPE_PACKED_PIXELS,
94 .visual = FB_VISUAL_TRUECOLOR,
95 .xpanstep = 1,
96 .ypanstep = 1,
97 .ywrapstep = 1,
98 .accel = FB_ACCEL_NONE,
99 };
100
unifb_sync(struct fb_info * info)101 static void unifb_sync(struct fb_info *info)
102 {
103 /* TODO: may, this can be replaced by interrupt */
104 int cnt;
105
106 for (cnt = 0; cnt < 0x10000000; cnt++) {
107 if (readl(UGE_COMMAND) & 0x1000000)
108 return;
109 }
110
111 if (cnt > 0x8000000)
112 dev_warn(info->device, "Warning: UniGFX GE time out ...\n");
113 }
114
unifb_prim_fillrect(struct fb_info * info,const struct fb_fillrect * region)115 static void unifb_prim_fillrect(struct fb_info *info,
116 const struct fb_fillrect *region)
117 {
118 int awidth = region->width;
119 int aheight = region->height;
120 int m_iBpp = info->var.bits_per_pixel;
121 int screen_width = info->var.xres;
122 int src_sel = 1; /* from fg_color */
123 int pat_sel = 1;
124 int src_x0 = 0;
125 int dst_x0 = region->dx;
126 int src_y0 = 0;
127 int dst_y0 = region->dy;
128 int rop_alpha_sel = 0;
129 int rop_alpha_code = 0xCC;
130 int x_dir = 1;
131 int y_dir = 1;
132 int alpha_r = 0;
133 int alpha_sel = 0;
134 int dst_pitch = screen_width * (m_iBpp / 8);
135 int dst_offset = dst_y0 * dst_pitch + dst_x0 * (m_iBpp / 8);
136 int src_pitch = screen_width * (m_iBpp / 8);
137 int src_offset = src_y0 * src_pitch + src_x0 * (m_iBpp / 8);
138 unsigned int command = 0;
139 int clip_region = 0;
140 int clip_en = 0;
141 int tp_en = 0;
142 int fg_color = 0;
143 int bottom = info->var.yres - 1;
144 int right = info->var.xres - 1;
145 int top = 0;
146
147 bottom = (bottom << 16) | right;
148 command = (rop_alpha_sel << 26) | (pat_sel << 18) | (src_sel << 16)
149 | (x_dir << 20) | (y_dir << 21) | (command << 24)
150 | (clip_region << 23) | (clip_en << 22) | (tp_en << 27);
151 src_pitch = (dst_pitch << 16) | src_pitch;
152 awidth = awidth | (aheight << 16);
153 alpha_r = ((rop_alpha_code & 0xff) << 8) | (alpha_r & 0xff)
154 | (alpha_sel << 16);
155 src_x0 = (src_x0 & 0x1fff) | ((src_y0 & 0x1fff) << 16);
156 dst_x0 = (dst_x0 & 0x1fff) | ((dst_y0 & 0x1fff) << 16);
157 fg_color = region->color;
158
159 unifb_sync(info);
160
161 writel(((u32 *)(info->pseudo_palette))[fg_color], UGE_FCOLOR);
162 writel(0, UGE_BCOLOR);
163 writel(src_pitch, UGE_PITCH);
164 writel(src_offset, UGE_SRCSTART);
165 writel(dst_offset, UGE_DSTSTART);
166 writel(awidth, UGE_WIDHEIGHT);
167 writel(top, UGE_CLIP0);
168 writel(bottom, UGE_CLIP1);
169 writel(alpha_r, UGE_ROPALPHA);
170 writel(src_x0, UGE_SRCXY);
171 writel(dst_x0, UGE_DSTXY);
172 writel(command, UGE_COMMAND);
173 }
174
unifb_fillrect(struct fb_info * info,const struct fb_fillrect * region)175 static void unifb_fillrect(struct fb_info *info,
176 const struct fb_fillrect *region)
177 {
178 struct fb_fillrect modded;
179 int vxres, vyres;
180
181 if (info->flags & FBINFO_HWACCEL_DISABLED) {
182 sys_fillrect(info, region);
183 return;
184 }
185
186 vxres = info->var.xres_virtual;
187 vyres = info->var.yres_virtual;
188
189 memcpy(&modded, region, sizeof(struct fb_fillrect));
190
191 if (!modded.width || !modded.height ||
192 modded.dx >= vxres || modded.dy >= vyres)
193 return;
194
195 if (modded.dx + modded.width > vxres)
196 modded.width = vxres - modded.dx;
197 if (modded.dy + modded.height > vyres)
198 modded.height = vyres - modded.dy;
199
200 unifb_prim_fillrect(info, &modded);
201 }
202
unifb_prim_copyarea(struct fb_info * info,const struct fb_copyarea * area)203 static void unifb_prim_copyarea(struct fb_info *info,
204 const struct fb_copyarea *area)
205 {
206 int awidth = area->width;
207 int aheight = area->height;
208 int m_iBpp = info->var.bits_per_pixel;
209 int screen_width = info->var.xres;
210 int src_sel = 2; /* from mem */
211 int pat_sel = 0;
212 int src_x0 = area->sx;
213 int dst_x0 = area->dx;
214 int src_y0 = area->sy;
215 int dst_y0 = area->dy;
216
217 int rop_alpha_sel = 0;
218 int rop_alpha_code = 0xCC;
219 int x_dir = 1;
220 int y_dir = 1;
221
222 int alpha_r = 0;
223 int alpha_sel = 0;
224 int dst_pitch = screen_width * (m_iBpp / 8);
225 int dst_offset = dst_y0 * dst_pitch + dst_x0 * (m_iBpp / 8);
226 int src_pitch = screen_width * (m_iBpp / 8);
227 int src_offset = src_y0 * src_pitch + src_x0 * (m_iBpp / 8);
228 unsigned int command = 0;
229 int clip_region = 0;
230 int clip_en = 1;
231 int tp_en = 0;
232 int top = 0;
233 int bottom = info->var.yres;
234 int right = info->var.xres;
235 int fg_color = 0;
236 int bg_color = 0;
237
238 if (src_x0 < 0)
239 src_x0 = 0;
240 if (src_y0 < 0)
241 src_y0 = 0;
242
243 if (src_y0 - dst_y0 > 0) {
244 y_dir = 1;
245 } else {
246 y_dir = 0;
247 src_offset = (src_y0 + aheight) * src_pitch +
248 src_x0 * (m_iBpp / 8);
249 dst_offset = (dst_y0 + aheight) * dst_pitch +
250 dst_x0 * (m_iBpp / 8);
251 src_y0 += aheight;
252 dst_y0 += aheight;
253 }
254
255 command = (rop_alpha_sel << 26) | (pat_sel << 18) | (src_sel << 16) |
256 (x_dir << 20) | (y_dir << 21) | (command << 24) |
257 (clip_region << 23) | (clip_en << 22) | (tp_en << 27);
258 src_pitch = (dst_pitch << 16) | src_pitch;
259 awidth = awidth | (aheight << 16);
260 alpha_r = ((rop_alpha_code & 0xff) << 8) | (alpha_r & 0xff) |
261 (alpha_sel << 16);
262 src_x0 = (src_x0 & 0x1fff) | ((src_y0 & 0x1fff) << 16);
263 dst_x0 = (dst_x0 & 0x1fff) | ((dst_y0 & 0x1fff) << 16);
264 bottom = (bottom << 16) | right;
265
266 unifb_sync(info);
267
268 writel(src_pitch, UGE_PITCH);
269 writel(src_offset, UGE_SRCSTART);
270 writel(dst_offset, UGE_DSTSTART);
271 writel(awidth, UGE_WIDHEIGHT);
272 writel(top, UGE_CLIP0);
273 writel(bottom, UGE_CLIP1);
274 writel(bg_color, UGE_BCOLOR);
275 writel(fg_color, UGE_FCOLOR);
276 writel(alpha_r, UGE_ROPALPHA);
277 writel(src_x0, UGE_SRCXY);
278 writel(dst_x0, UGE_DSTXY);
279 writel(command, UGE_COMMAND);
280 }
281
unifb_copyarea(struct fb_info * info,const struct fb_copyarea * area)282 static void unifb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
283 {
284 struct fb_copyarea modded;
285 u32 vxres, vyres;
286 modded.sx = area->sx;
287 modded.sy = area->sy;
288 modded.dx = area->dx;
289 modded.dy = area->dy;
290 modded.width = area->width;
291 modded.height = area->height;
292
293 if (info->flags & FBINFO_HWACCEL_DISABLED) {
294 sys_copyarea(info, area);
295 return;
296 }
297
298 vxres = info->var.xres_virtual;
299 vyres = info->var.yres_virtual;
300
301 if (!modded.width || !modded.height ||
302 modded.sx >= vxres || modded.sy >= vyres ||
303 modded.dx >= vxres || modded.dy >= vyres)
304 return;
305
306 if (modded.sx + modded.width > vxres)
307 modded.width = vxres - modded.sx;
308 if (modded.dx + modded.width > vxres)
309 modded.width = vxres - modded.dx;
310 if (modded.sy + modded.height > vyres)
311 modded.height = vyres - modded.sy;
312 if (modded.dy + modded.height > vyres)
313 modded.height = vyres - modded.dy;
314
315 unifb_prim_copyarea(info, &modded);
316 }
317
unifb_imageblit(struct fb_info * info,const struct fb_image * image)318 static void unifb_imageblit(struct fb_info *info, const struct fb_image *image)
319 {
320 sys_imageblit(info, image);
321 }
322
get_line_length(int xres_virtual,int bpp)323 static u_long get_line_length(int xres_virtual, int bpp)
324 {
325 u_long length;
326
327 length = xres_virtual * bpp;
328 length = (length + 31) & ~31;
329 length >>= 3;
330 return length;
331 }
332
333 /*
334 * Setting the video mode has been split into two parts.
335 * First part, xxxfb_check_var, must not write anything
336 * to hardware, it should only verify and adjust var.
337 * This means it doesn't alter par but it does use hardware
338 * data from it to check this var.
339 */
unifb_check_var(struct fb_var_screeninfo * var,struct fb_info * info)340 static int unifb_check_var(struct fb_var_screeninfo *var,
341 struct fb_info *info)
342 {
343 u_long line_length;
344
345 /*
346 * FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal!
347 * as FB_VMODE_SMOOTH_XPAN is only used internally
348 */
349
350 if (var->vmode & FB_VMODE_CONUPDATE) {
351 var->vmode |= FB_VMODE_YWRAP;
352 var->xoffset = info->var.xoffset;
353 var->yoffset = info->var.yoffset;
354 }
355
356 /*
357 * Some very basic checks
358 */
359 if (!var->xres)
360 var->xres = 1;
361 if (!var->yres)
362 var->yres = 1;
363 if (var->xres > var->xres_virtual)
364 var->xres_virtual = var->xres;
365 if (var->yres > var->yres_virtual)
366 var->yres_virtual = var->yres;
367 if (var->bits_per_pixel <= 1)
368 var->bits_per_pixel = 1;
369 else if (var->bits_per_pixel <= 8)
370 var->bits_per_pixel = 8;
371 else if (var->bits_per_pixel <= 16)
372 var->bits_per_pixel = 16;
373 else if (var->bits_per_pixel <= 24)
374 var->bits_per_pixel = 24;
375 else if (var->bits_per_pixel <= 32)
376 var->bits_per_pixel = 32;
377 else
378 return -EINVAL;
379
380 if (var->xres_virtual < var->xoffset + var->xres)
381 var->xres_virtual = var->xoffset + var->xres;
382 if (var->yres_virtual < var->yoffset + var->yres)
383 var->yres_virtual = var->yoffset + var->yres;
384
385 /*
386 * Memory limit
387 */
388 line_length =
389 get_line_length(var->xres_virtual, var->bits_per_pixel);
390 if (line_length * var->yres_virtual > UNIFB_MEMSIZE)
391 return -ENOMEM;
392
393 /*
394 * Now that we checked it we alter var. The reason being is that the
395 * video mode passed in might not work but slight changes to it might
396 * make it work. This way we let the user know what is acceptable.
397 */
398 switch (var->bits_per_pixel) {
399 case 1:
400 case 8:
401 var->red.offset = 0;
402 var->red.length = 8;
403 var->green.offset = 0;
404 var->green.length = 8;
405 var->blue.offset = 0;
406 var->blue.length = 8;
407 var->transp.offset = 0;
408 var->transp.length = 0;
409 break;
410 case 16: /* RGBA 5551 */
411 if (var->transp.length) {
412 var->red.offset = 0;
413 var->red.length = 5;
414 var->green.offset = 5;
415 var->green.length = 5;
416 var->blue.offset = 10;
417 var->blue.length = 5;
418 var->transp.offset = 15;
419 var->transp.length = 1;
420 } else { /* RGB 565 */
421 var->red.offset = 11;
422 var->red.length = 5;
423 var->green.offset = 5;
424 var->green.length = 6;
425 var->blue.offset = 0;
426 var->blue.length = 5;
427 var->transp.offset = 0;
428 var->transp.length = 0;
429 }
430 break;
431 case 24: /* RGB 888 */
432 var->red.offset = 0;
433 var->red.length = 8;
434 var->green.offset = 8;
435 var->green.length = 8;
436 var->blue.offset = 16;
437 var->blue.length = 8;
438 var->transp.offset = 0;
439 var->transp.length = 0;
440 break;
441 case 32: /* RGBA 8888 */
442 var->red.offset = 16;
443 var->red.length = 8;
444 var->green.offset = 8;
445 var->green.length = 8;
446 var->blue.offset = 0;
447 var->blue.length = 8;
448 var->transp.offset = 24;
449 var->transp.length = 8;
450 break;
451 }
452 var->red.msb_right = 0;
453 var->green.msb_right = 0;
454 var->blue.msb_right = 0;
455 var->transp.msb_right = 0;
456
457 return 0;
458 }
459
460 /*
461 * This routine actually sets the video mode. It's in here where we
462 * the hardware state info->par and fix which can be affected by the
463 * change in par. For this driver it doesn't do much.
464 */
unifb_set_par(struct fb_info * info)465 static int unifb_set_par(struct fb_info *info)
466 {
467 int hTotal, vTotal, hSyncStart, hSyncEnd, vSyncStart, vSyncEnd;
468 int format;
469
470 #ifdef CONFIG_PUV3_PM
471 struct clk *clk_vga;
472 u32 pixclk = 0;
473 int i;
474
475 for (i = 0; i <= 10; i++) {
476 if (info->var.xres == unifb_modes[i].xres
477 && info->var.yres == unifb_modes[i].yres
478 && info->var.upper_margin == unifb_modes[i].upper_margin
479 && info->var.lower_margin == unifb_modes[i].lower_margin
480 && info->var.left_margin == unifb_modes[i].left_margin
481 && info->var.right_margin == unifb_modes[i].right_margin
482 && info->var.hsync_len == unifb_modes[i].hsync_len
483 && info->var.vsync_len == unifb_modes[i].vsync_len) {
484 pixclk = unifb_modes[i].pixclock;
485 break;
486 }
487 }
488
489 /* set clock rate */
490 clk_vga = clk_get(info->device, "VGA_CLK");
491 if (clk_vga == ERR_PTR(-ENOENT))
492 return -ENOENT;
493
494 if (pixclk != 0) {
495 if (clk_set_rate(clk_vga, pixclk)) { /* set clock failed */
496 info->fix = unifb_fix;
497 info->var = unifb_default;
498 if (clk_set_rate(clk_vga, unifb_default.pixclock))
499 return -EINVAL;
500 }
501 }
502 #endif
503
504 info->fix.line_length = get_line_length(info->var.xres_virtual,
505 info->var.bits_per_pixel);
506
507 hSyncStart = info->var.xres + info->var.right_margin;
508 hSyncEnd = hSyncStart + info->var.hsync_len;
509 hTotal = hSyncEnd + info->var.left_margin;
510
511 vSyncStart = info->var.yres + info->var.lower_margin;
512 vSyncEnd = vSyncStart + info->var.vsync_len;
513 vTotal = vSyncEnd + info->var.upper_margin;
514
515 switch (info->var.bits_per_pixel) {
516 case 8:
517 format = UDE_CFG_DST8;
518 break;
519 case 16:
520 format = UDE_CFG_DST16;
521 break;
522 case 24:
523 format = UDE_CFG_DST24;
524 break;
525 case 32:
526 format = UDE_CFG_DST32;
527 break;
528 default:
529 return -EINVAL;
530 }
531
532 writel(info->fix.smem_start, UDE_FSA);
533 writel(info->var.yres, UDE_LS);
534 writel(get_line_length(info->var.xres,
535 info->var.bits_per_pixel) >> 3, UDE_PS);
536 /* >> 3 for hardware required. */
537 writel((hTotal << 16) | (info->var.xres), UDE_HAT);
538 writel(((hTotal - 1) << 16) | (info->var.xres - 1), UDE_HBT);
539 writel(((hSyncEnd - 1) << 16) | (hSyncStart - 1), UDE_HST);
540 writel((vTotal << 16) | (info->var.yres), UDE_VAT);
541 writel(((vTotal - 1) << 16) | (info->var.yres - 1), UDE_VBT);
542 writel(((vSyncEnd - 1) << 16) | (vSyncStart - 1), UDE_VST);
543 writel(UDE_CFG_GDEN_ENABLE | UDE_CFG_TIMEUP_ENABLE
544 | format | 0xC0000001, UDE_CFG);
545
546 return 0;
547 }
548
549 /*
550 * Set a single color register. The values supplied are already
551 * rounded down to the hardware's capabilities (according to the
552 * entries in the var structure). Return != 0 for invalid regno.
553 */
unifb_setcolreg(u_int regno,u_int red,u_int green,u_int blue,u_int transp,struct fb_info * info)554 static int unifb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
555 u_int transp, struct fb_info *info)
556 {
557 if (regno >= 256) /* no. of hw registers */
558 return 1;
559
560 /* grayscale works only partially under directcolor */
561 if (info->var.grayscale) {
562 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
563 red = green = blue =
564 (red * 77 + green * 151 + blue * 28) >> 8;
565 }
566
567 #define CNVT_TOHW(val, width) ((((val)<<(width))+0x7FFF-(val))>>16)
568 switch (info->fix.visual) {
569 case FB_VISUAL_TRUECOLOR:
570 case FB_VISUAL_PSEUDOCOLOR:
571 red = CNVT_TOHW(red, info->var.red.length);
572 green = CNVT_TOHW(green, info->var.green.length);
573 blue = CNVT_TOHW(blue, info->var.blue.length);
574 transp = CNVT_TOHW(transp, info->var.transp.length);
575 break;
576 case FB_VISUAL_DIRECTCOLOR:
577 red = CNVT_TOHW(red, 8); /* expect 8 bit DAC */
578 green = CNVT_TOHW(green, 8);
579 blue = CNVT_TOHW(blue, 8);
580 /* hey, there is bug in transp handling... */
581 transp = CNVT_TOHW(transp, 8);
582 break;
583 }
584 #undef CNVT_TOHW
585 /* Truecolor has hardware independent palette */
586 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
587 u32 v;
588
589 if (regno >= 16)
590 return 1;
591
592 v = (red << info->var.red.offset) |
593 (green << info->var.green.offset) |
594 (blue << info->var.blue.offset) |
595 (transp << info->var.transp.offset);
596 switch (info->var.bits_per_pixel) {
597 case 8:
598 break;
599 case 16:
600 case 24:
601 case 32:
602 ((u32 *) (info->pseudo_palette))[regno] = v;
603 break;
604 default:
605 return 1;
606 }
607 return 0;
608 }
609 return 0;
610 }
611
612 /*
613 * Pan or Wrap the Display
614 *
615 * This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
616 */
unifb_pan_display(struct fb_var_screeninfo * var,struct fb_info * info)617 static int unifb_pan_display(struct fb_var_screeninfo *var,
618 struct fb_info *info)
619 {
620 if (var->vmode & FB_VMODE_YWRAP) {
621 if (var->yoffset < 0
622 || var->yoffset >= info->var.yres_virtual
623 || var->xoffset)
624 return -EINVAL;
625 } else {
626 if (var->xoffset + info->var.xres > info->var.xres_virtual ||
627 var->yoffset + info->var.yres > info->var.yres_virtual)
628 return -EINVAL;
629 }
630 info->var.xoffset = var->xoffset;
631 info->var.yoffset = var->yoffset;
632 if (var->vmode & FB_VMODE_YWRAP)
633 info->var.vmode |= FB_VMODE_YWRAP;
634 else
635 info->var.vmode &= ~FB_VMODE_YWRAP;
636 return 0;
637 }
638
unifb_mmap(struct fb_info * info,struct vm_area_struct * vma)639 int unifb_mmap(struct fb_info *info,
640 struct vm_area_struct *vma)
641 {
642 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
643
644 return vm_iomap_memory(vma, info->fix.smem_start, info->fix.smem_len);
645 }
646
647 static struct fb_ops unifb_ops = {
648 .fb_read = fb_sys_read,
649 .fb_write = fb_sys_write,
650 .fb_check_var = unifb_check_var,
651 .fb_set_par = unifb_set_par,
652 .fb_setcolreg = unifb_setcolreg,
653 .fb_pan_display = unifb_pan_display,
654 .fb_fillrect = unifb_fillrect,
655 .fb_copyarea = unifb_copyarea,
656 .fb_imageblit = unifb_imageblit,
657 .fb_mmap = unifb_mmap,
658 };
659
660 /*
661 * Initialisation
662 */
unifb_probe(struct platform_device * dev)663 static int unifb_probe(struct platform_device *dev)
664 {
665 struct fb_info *info;
666 u32 unifb_regs[UNIFB_REGS_NUM];
667 int retval = -ENOMEM;
668 struct resource *iomem;
669 void *videomemory;
670
671 videomemory = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP,
672 get_order(UNIFB_MEMSIZE));
673 if (!videomemory)
674 goto err;
675
676 memset(videomemory, 0, UNIFB_MEMSIZE);
677
678 unifb_fix.smem_start = virt_to_phys(videomemory);
679 unifb_fix.smem_len = UNIFB_MEMSIZE;
680
681 iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
682 unifb_fix.mmio_start = iomem->start;
683
684 info = framebuffer_alloc(sizeof(u32)*256, &dev->dev);
685 if (!info)
686 goto err;
687
688 info->screen_base = (char __iomem *)videomemory;
689 info->fbops = &unifb_ops;
690
691 retval = fb_find_mode(&info->var, info, NULL,
692 unifb_modes, 10, &unifb_modes[0], 16);
693
694 if (!retval || (retval == 4))
695 info->var = unifb_default;
696
697 info->fix = unifb_fix;
698 info->pseudo_palette = info->par;
699 info->par = NULL;
700 info->flags = FBINFO_FLAG_DEFAULT;
701 #ifdef FB_ACCEL_PUV3_UNIGFX
702 info->fix.accel = FB_ACCEL_PUV3_UNIGFX;
703 #endif
704
705 retval = fb_alloc_cmap(&info->cmap, 256, 0);
706 if (retval < 0)
707 goto err1;
708
709 retval = register_framebuffer(info);
710 if (retval < 0)
711 goto err2;
712 platform_set_drvdata(dev, info);
713 platform_device_add_data(dev, unifb_regs, sizeof(u32) * UNIFB_REGS_NUM);
714
715 fb_info(info, "Virtual frame buffer device, using %dM of video memory\n",
716 UNIFB_MEMSIZE >> 20);
717 return 0;
718 err2:
719 fb_dealloc_cmap(&info->cmap);
720 err1:
721 framebuffer_release(info);
722 err:
723 return retval;
724 }
725
unifb_remove(struct platform_device * dev)726 static int unifb_remove(struct platform_device *dev)
727 {
728 struct fb_info *info = platform_get_drvdata(dev);
729
730 if (info) {
731 unregister_framebuffer(info);
732 fb_dealloc_cmap(&info->cmap);
733 framebuffer_release(info);
734 }
735 return 0;
736 }
737
738 #ifdef CONFIG_PM
unifb_resume(struct platform_device * dev)739 static int unifb_resume(struct platform_device *dev)
740 {
741 int rc = 0;
742 u32 *unifb_regs = dev->dev.platform_data;
743
744 if (dev->dev.power.power_state.event == PM_EVENT_ON)
745 return 0;
746
747 console_lock();
748
749 if (dev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
750 writel(unifb_regs[0], UDE_FSA);
751 writel(unifb_regs[1], UDE_LS);
752 writel(unifb_regs[2], UDE_PS);
753 writel(unifb_regs[3], UDE_HAT);
754 writel(unifb_regs[4], UDE_HBT);
755 writel(unifb_regs[5], UDE_HST);
756 writel(unifb_regs[6], UDE_VAT);
757 writel(unifb_regs[7], UDE_VBT);
758 writel(unifb_regs[8], UDE_VST);
759 writel(unifb_regs[9], UDE_CFG);
760 }
761 dev->dev.power.power_state = PMSG_ON;
762
763 console_unlock();
764
765 return rc;
766 }
767
unifb_suspend(struct platform_device * dev,pm_message_t mesg)768 static int unifb_suspend(struct platform_device *dev, pm_message_t mesg)
769 {
770 u32 *unifb_regs = dev->dev.platform_data;
771
772 unifb_regs[0] = readl(UDE_FSA);
773 unifb_regs[1] = readl(UDE_LS);
774 unifb_regs[2] = readl(UDE_PS);
775 unifb_regs[3] = readl(UDE_HAT);
776 unifb_regs[4] = readl(UDE_HBT);
777 unifb_regs[5] = readl(UDE_HST);
778 unifb_regs[6] = readl(UDE_VAT);
779 unifb_regs[7] = readl(UDE_VBT);
780 unifb_regs[8] = readl(UDE_VST);
781 unifb_regs[9] = readl(UDE_CFG);
782
783 if (mesg.event == dev->dev.power.power_state.event)
784 return 0;
785
786 switch (mesg.event) {
787 case PM_EVENT_FREEZE: /* about to take snapshot */
788 case PM_EVENT_PRETHAW: /* before restoring snapshot */
789 goto done;
790 }
791
792 console_lock();
793
794 /* do nothing... */
795
796 console_unlock();
797
798 done:
799 dev->dev.power.power_state = mesg;
800
801 return 0;
802 }
803 #else
804 #define unifb_resume NULL
805 #define unifb_suspend NULL
806 #endif
807
808 static struct platform_driver unifb_driver = {
809 .probe = unifb_probe,
810 .remove = unifb_remove,
811 .resume = unifb_resume,
812 .suspend = unifb_suspend,
813 .driver = {
814 .name = "PKUnity-v3-UNIGFX",
815 },
816 };
817
unifb_init(void)818 static int __init unifb_init(void)
819 {
820 #ifndef MODULE
821 if (fb_get_options("unifb", NULL))
822 return -ENODEV;
823 #endif
824
825 return platform_driver_register(&unifb_driver);
826 }
827
828 module_init(unifb_init);
829
unifb_exit(void)830 static void __exit unifb_exit(void)
831 {
832 platform_driver_unregister(&unifb_driver);
833 }
834
835 module_exit(unifb_exit);
836
837 MODULE_LICENSE("GPL v2");
838
