2 * Frame Buffer Driver for PKUnity-v3 Unigfx
3 * Code specific to PKUnity SoC and UniCore ISA
5 * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
6 * Copyright (C) 2001-2010 Guan Xuetao
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.
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>
19 #include <linux/init.h>
20 #include <linux/console.h>
22 #include <asm/sizes.h>
23 #include <mach/hardware.h>
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 */
31 * cause UNIGFX don not have EDID
32 * all the modes are organized as follow
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 },
70 static struct fb_var_screeninfo unifb_default = {
79 .activate = FB_ACTIVATE_NOW,
89 .vmode = FB_VMODE_NONINTERLACED,
92 static struct fb_fix_screeninfo unifb_fix = {
94 .type = FB_TYPE_PACKED_PIXELS,
95 .visual = FB_VISUAL_TRUECOLOR,
99 .accel = FB_ACCEL_NONE,
102 static void unifb_sync(struct fb_info *info)
104 /* TODO: may, this can be replaced by interrupt */
107 for (cnt = 0; cnt < 0x10000000; cnt++) {
108 if (readl(UGE_COMMAND) & 0x1000000)
113 dev_warn(info->device, "Warning: UniGFX GE time out ...\n");
116 static void unifb_prim_fillrect(struct fb_info *info,
117 const struct fb_fillrect *region)
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 */
126 int dst_x0 = region->dx;
128 int dst_y0 = region->dy;
129 int rop_alpha_sel = 0;
130 int rop_alpha_code = 0xCC;
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;
144 int bottom = info->var.yres - 1;
145 int right = info->var.xres - 1;
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)
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;
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);
176 static void unifb_fillrect(struct fb_info *info,
177 const struct fb_fillrect *region)
179 struct fb_fillrect modded;
182 if (info->flags & FBINFO_HWACCEL_DISABLED) {
183 sys_fillrect(info, region);
187 vxres = info->var.xres_virtual;
188 vyres = info->var.yres_virtual;
190 memcpy(&modded, region, sizeof(struct fb_fillrect));
192 if (!modded.width || !modded.height ||
193 modded.dx >= vxres || modded.dy >= vyres)
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;
201 unifb_prim_fillrect(info, &modded);
204 static void unifb_prim_copyarea(struct fb_info *info,
205 const struct fb_copyarea *area)
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 */
213 int src_x0 = area->sx;
214 int dst_x0 = area->dx;
215 int src_y0 = area->sy;
216 int dst_y0 = area->dy;
218 int rop_alpha_sel = 0;
219 int rop_alpha_code = 0xCC;
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;
234 int bottom = info->var.yres;
235 int right = info->var.xres;
244 if (src_y0 - dst_y0 > 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);
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) |
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;
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);
283 static void unifb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
285 struct fb_copyarea modded;
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;
294 if (info->flags & FBINFO_HWACCEL_DISABLED) {
295 sys_copyarea(info, area);
299 vxres = info->var.xres_virtual;
300 vyres = info->var.yres_virtual;
302 if (!modded.width || !modded.height ||
303 modded.sx >= vxres || modded.sy >= vyres ||
304 modded.dx >= vxres || modded.dy >= vyres)
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;
316 unifb_prim_copyarea(info, &modded);
319 static void unifb_imageblit(struct fb_info *info, const struct fb_image *image)
321 sys_imageblit(info, image);
324 static u_long get_line_length(int xres_virtual, int bpp)
328 length = xres_virtual * bpp;
329 length = (length + 31) & ~31;
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.
341 static int unifb_check_var(struct fb_var_screeninfo *var,
342 struct fb_info *info)
347 * FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal!
348 * as FB_VMODE_SMOOTH_XPAN is only used internally
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;
358 * Some very basic checks
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;
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;
390 get_line_length(var->xres_virtual, var->bits_per_pixel);
391 if (line_length * var->yres_virtual > UNIFB_MEMSIZE)
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.
399 switch (var->bits_per_pixel) {
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;
411 case 16: /* RGBA 5551 */
412 if (var->transp.length) {
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;
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;
432 case 24: /* RGB 888 */
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;
442 case 32: /* RGBA 8888 */
443 var->red.offset = 16;
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;
453 var->red.msb_right = 0;
454 var->green.msb_right = 0;
455 var->blue.msb_right = 0;
456 var->transp.msb_right = 0;
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.
466 static int unifb_set_par(struct fb_info *info)
468 int hTotal, vTotal, hSyncStart, hSyncEnd, vSyncStart, vSyncEnd;
471 #ifdef CONFIG_PUV3_PM
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;
491 clk_vga = clk_get(info->device, "VGA_CLK");
492 if (clk_vga == ERR_PTR(-ENOENT))
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))
505 info->fix.line_length = get_line_length(info->var.xres_virtual,
506 info->var.bits_per_pixel);
508 hSyncStart = info->var.xres + info->var.right_margin;
509 hSyncEnd = hSyncStart + info->var.hsync_len;
510 hTotal = hSyncEnd + info->var.left_margin;
512 vSyncStart = info->var.yres + info->var.lower_margin;
513 vSyncEnd = vSyncStart + info->var.vsync_len;
514 vTotal = vSyncEnd + info->var.upper_margin;
516 switch (info->var.bits_per_pixel) {
518 format = UDE_CFG_DST8;
521 format = UDE_CFG_DST16;
524 format = UDE_CFG_DST24;
527 format = UDE_CFG_DST32;
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);
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.
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)
558 if (regno >= 256) /* no. of hw registers */
561 /* grayscale works only partially under directcolor */
562 if (info->var.grayscale) {
563 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
565 (red * 77 + green * 151 + blue * 28) >> 8;
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);
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);
586 /* Truecolor has hardware independent palette */
587 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
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) {
603 ((u32 *) (info->pseudo_palette))[regno] = v;
614 * Pan or Wrap the Display
616 * This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
618 static int unifb_pan_display(struct fb_var_screeninfo *var,
619 struct fb_info *info)
621 if (var->vmode & FB_VMODE_YWRAP) {
623 || var->yoffset >= info->var.yres_virtual
627 if (var->xoffset + info->var.xres > info->var.xres_virtual ||
628 var->yoffset + info->var.yres > info->var.yres_virtual)
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;
636 info->var.vmode &= ~FB_VMODE_YWRAP;
640 int unifb_mmap(struct fb_info *info,
641 struct vm_area_struct *vma)
643 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
645 return vm_iomap_memory(vma, info->fix.smem_start, info->fix.smem_len);
648 static struct fb_ops unifb_ops = {
649 .fb_read = fb_sys_read,
650 .fb_write = fb_sys_write,
651 .fb_check_var = unifb_check_var,
652 .fb_set_par = unifb_set_par,
653 .fb_setcolreg = unifb_setcolreg,
654 .fb_pan_display = unifb_pan_display,
655 .fb_fillrect = unifb_fillrect,
656 .fb_copyarea = unifb_copyarea,
657 .fb_imageblit = unifb_imageblit,
658 .fb_mmap = unifb_mmap,
664 static int unifb_probe(struct platform_device *dev)
666 struct fb_info *info;
667 u32 unifb_regs[UNIFB_REGS_NUM];
668 int retval = -ENOMEM;
669 struct resource *iomem;
672 videomemory = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP,
673 get_order(UNIFB_MEMSIZE));
677 memset(videomemory, 0, UNIFB_MEMSIZE);
679 unifb_fix.smem_start = virt_to_phys(videomemory);
680 unifb_fix.smem_len = UNIFB_MEMSIZE;
682 iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
683 unifb_fix.mmio_start = iomem->start;
685 info = framebuffer_alloc(sizeof(u32)*256, &dev->dev);
689 info->screen_base = (char __iomem *)videomemory;
690 info->fbops = &unifb_ops;
692 retval = fb_find_mode(&info->var, info, NULL,
693 unifb_modes, 10, &unifb_modes[0], 16);
695 if (!retval || (retval == 4))
696 info->var = unifb_default;
698 info->fix = unifb_fix;
699 info->pseudo_palette = info->par;
701 info->flags = FBINFO_FLAG_DEFAULT;
702 #ifdef FB_ACCEL_PUV3_UNIGFX
703 info->fix.accel = FB_ACCEL_PUV3_UNIGFX;
706 retval = fb_alloc_cmap(&info->cmap, 256, 0);
710 retval = register_framebuffer(info);
713 platform_set_drvdata(dev, info);
714 platform_device_add_data(dev, unifb_regs, sizeof(u32) * UNIFB_REGS_NUM);
717 "fb%d: Virtual frame buffer device, using %dM of video memory\n",
718 info->node, UNIFB_MEMSIZE >> 20);
721 fb_dealloc_cmap(&info->cmap);
723 framebuffer_release(info);
728 static int unifb_remove(struct platform_device *dev)
730 struct fb_info *info = platform_get_drvdata(dev);
733 unregister_framebuffer(info);
734 fb_dealloc_cmap(&info->cmap);
735 framebuffer_release(info);
741 static int unifb_resume(struct platform_device *dev)
744 u32 *unifb_regs = dev->dev.platform_data;
746 if (dev->dev.power.power_state.event == PM_EVENT_ON)
751 if (dev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
752 writel(unifb_regs[0], UDE_FSA);
753 writel(unifb_regs[1], UDE_LS);
754 writel(unifb_regs[2], UDE_PS);
755 writel(unifb_regs[3], UDE_HAT);
756 writel(unifb_regs[4], UDE_HBT);
757 writel(unifb_regs[5], UDE_HST);
758 writel(unifb_regs[6], UDE_VAT);
759 writel(unifb_regs[7], UDE_VBT);
760 writel(unifb_regs[8], UDE_VST);
761 writel(unifb_regs[9], UDE_CFG);
763 dev->dev.power.power_state = PMSG_ON;
770 static int unifb_suspend(struct platform_device *dev, pm_message_t mesg)
772 u32 *unifb_regs = dev->dev.platform_data;
774 unifb_regs[0] = readl(UDE_FSA);
775 unifb_regs[1] = readl(UDE_LS);
776 unifb_regs[2] = readl(UDE_PS);
777 unifb_regs[3] = readl(UDE_HAT);
778 unifb_regs[4] = readl(UDE_HBT);
779 unifb_regs[5] = readl(UDE_HST);
780 unifb_regs[6] = readl(UDE_VAT);
781 unifb_regs[7] = readl(UDE_VBT);
782 unifb_regs[8] = readl(UDE_VST);
783 unifb_regs[9] = readl(UDE_CFG);
785 if (mesg.event == dev->dev.power.power_state.event)
788 switch (mesg.event) {
789 case PM_EVENT_FREEZE: /* about to take snapshot */
790 case PM_EVENT_PRETHAW: /* before restoring snapshot */
801 dev->dev.power.power_state = mesg;
806 #define unifb_resume NULL
807 #define unifb_suspend NULL
810 static struct platform_driver unifb_driver = {
811 .probe = unifb_probe,
812 .remove = unifb_remove,
813 .resume = unifb_resume,
814 .suspend = unifb_suspend,
816 .name = "PKUnity-v3-UNIGFX",
820 static int __init unifb_init(void)
823 if (fb_get_options("unifb", NULL))
827 return platform_driver_register(&unifb_driver);
830 module_init(unifb_init);
832 static void __exit unifb_exit(void)
834 platform_driver_unregister(&unifb_driver);
837 module_exit(unifb_exit);
839 MODULE_LICENSE("GPL v2");