/*
* Frame Buffer Driver for PKUnity-v3 Unigfx
* Code specific to PKUnity SoC and UniCore ISA
*
* Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
* Copyright (C) 2001-2010 Guan Xuetao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/console.h>
#include <asm/sizes.h>
#include <mach/hardware.h>
/* Platform_data reserved for unifb registers. */
#define UNIFB_REGS_NUM 10
/* RAM reserved for the frame buffer. */
#define UNIFB_MEMSIZE (SZ_4M) /* 4 MB for 1024*768*32b */
/*
* cause UNIGFX don not have EDID
* all the modes are organized as follow
*/
static const struct fb_videomode unifb_modes[] = {
/* 0 640x480-60 VESA */
{ "640x480@60", 60, 640, 480, 25175000, 48, 16, 34, 10, 96, 1,
0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
/* 1 640x480-75 VESA */
{ "640x480@75", 75, 640, 480, 31500000, 120, 16, 18, 1, 64, 1,
0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
/* 2 800x600-60 VESA */
{ "800x600@60", 60, 800, 600, 40000000, 88, 40, 26, 1, 128, 1,
0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
/* 3 800x600-75 VESA */
{ "800x600@75", 75, 800, 600, 49500000, 160, 16, 23, 1, 80, 1,
0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
/* 4 1024x768-60 VESA */
{ "1024x768@60", 60, 1024, 768, 65000000, 160, 24, 34, 3, 136, 1,
0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
/* 5 1024x768-75 VESA */
{ "1024x768@75", 75, 1024, 768, 78750000, 176, 16, 30, 1, 96, 1,
0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
/* 6 1280x960-60 VESA */
{ "1280x960@60", 60, 1280, 960, 108000000, 312, 96, 38, 1, 112, 1,
0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
/* 7 1440x900-60 VESA */
{ "1440x900@60", 60, 1440, 900, 106500000, 232, 80, 30, 3, 152, 1,
0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
/* 8 FIXME 9 1024x600-60 VESA UNTESTED */
{ "1024x600@60", 60, 1024, 600, 50650000, 160, 24, 26, 1, 136, 1,
0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
/* 9 FIXME 10 1024x600-75 VESA UNTESTED */
{ "1024x600@75", 75, 1024, 600, 61500000, 176, 16, 23, 1, 96, 1,
0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
/* 10 FIXME 11 1366x768-60 VESA UNTESTED */
{ "1366x768@60", 60, 1366, 768, 85500000, 256, 58, 18, 1, 112, 3,
0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
};
static struct fb_var_screeninfo unifb_default = {
.xres = 640,
.yres = 480,
.xres_virtual = 640,
.yres_virtual = 480,
.bits_per_pixel = 16,
.red = { 11, 5, 0 },
.green = { 5, 6, 0 },
.blue = { 0, 5, 0 },
.activate = FB_ACTIVATE_NOW,
.height = -1,
.width = -1,
.pixclock = 25175000,
.left_margin = 48,
.right_margin = 16,
.upper_margin = 33,
.lower_margin = 10,
.hsync_len = 96,
.vsync_len = 2,
.vmode = FB_VMODE_NONINTERLACED,
};
static struct fb_fix_screeninfo unifb_fix = {
.id = "UNIGFX FB",
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_TRUECOLOR,
.xpanstep = 1,
.ypanstep = 1,
.ywrapstep = 1,
.accel = FB_ACCEL_NONE,
};
static void unifb_sync(struct fb_info *info)
{
/* TODO: may, this can be replaced by interrupt */
int cnt;
for (cnt = 0; cnt < 0x10000000; cnt++) {
if (readl(UGE_COMMAND) & 0x1000000)
return;
}
if (cnt > 0x8000000)
dev_warn(info->device, "Warning: UniGFX GE time out ...\n");
}
static void unifb_prim_fillrect(struct fb_info *info,
const struct fb_fillrect *region)
{
int awidth = region->width;
int aheight = region->height;
int m_iBpp = info->var.bits_per_pixel;
int screen_width = info->var.xres;
int src_sel = 1; /* from fg_color */
int pat_sel = 1;
int src_x0 = 0;
int dst_x0 = region->dx;
int src_y0 = 0;
int dst_y0 = region->dy;
int rop_alpha_sel = 0;
int rop_alpha_code = 0xCC;
int x_dir = 1;
int y_dir = 1;
int alpha_r = 0;
int alpha_sel = 0;
int dst_pitch = screen_width * (m_iBpp / 8);
int dst_offset = dst_y0 * dst_pitch + dst_x0 * (m_iBpp / 8);
int src_pitch = screen_width * (m_iBpp / 8);
int src_offset = src_y0 * src_pitch + src_x0 * (m_iBpp / 8);
unsigned int command = 0;
int clip_region = 0;
int clip_en = 0;
int tp_en = 0;
int fg_color = 0;
int bottom = info->var.yres - 1;
int right = info->var.xres - 1;
int top = 0;
bottom = (bottom << 16) | right;
command = (rop_alpha_sel << 26) | (pat_sel << 18) | (src_sel << 16)
| (x_dir << 20) | (y_dir << 21) | (command << 24)
| (clip_region << 23) | (clip_en << 22) | (tp_en << 27);
src_pitch = (dst_pitch << 16) | src_pitch;
awidth = awidth | (aheight << 16);
alpha_r = ((rop_alpha_code & 0xff) << 8) | (alpha_r & 0xff)
| (alpha_sel << 16);
src_x0 = (src_x0 & 0x1fff) | ((src_y0 & 0x1fff) << 16);
dst_x0 = (dst_x0 & 0x1fff) | ((dst_y0 & 0x1fff) << 16);
fg_color = region->color;
unifb_sync(info);
writel(((u32 *)(info->pseudo_palette))[fg_color], UGE_FCOLOR);
writel(0, UGE_BCOLOR);
writel(src_pitch, UGE_PITCH);
writel(src_offset, UGE_SRCSTART);
writel(dst_offset, UGE_DSTSTART);
writel(awidth, UGE_WIDHEIGHT);
writel(top, UGE_CLIP0);
writel(bottom, UGE_CLIP1);
writel(alpha_r, UGE_ROPALPHA);
writel(src_x0, UGE_SRCXY);
writel(dst_x0, UGE_DSTXY);
writel(command, UGE_COMMAND);
}
static void unifb_fillrect(struct fb_info *info,
const struct fb_fillrect *region)
{
struct fb_fillrect modded;
int vxres, vyres;
if (info->flags & FBINFO_HWACCEL_DISABLED) {
sys_fillrect(info, region);
return;
}
vxres = info->var.xres_virtual;
vyres = info->var.yres_virtual;
memcpy(&modded, region, sizeof(struct fb_fillrect));
if (!modded.width || !modded.height ||
modded.dx >= vxres || modded.dy >= vyres)
return;
if (modded.dx + modded.width > vxres)
modded.width = vxres - modded.dx;
if (modded.dy + modded.height > vyres)
modded.height = vyres - modded.dy;
unifb_prim_fillrect(info, &modded);
}
static void unifb_prim_copyarea(struct fb_info *info,
const struct fb_copyarea *area)
{
int awidth = area->width;
int aheight = area->height;
int m_iBpp = info->var.bits_per_pixel;
int screen_width = info->var.xres;
int src_sel = 2; /* from mem */
int pat_sel = 0;
int src_x0 = area->sx;
int dst_x0 = area->dx;
int src_y0 = area->sy;
int dst_y0 = area->dy;
int rop_alpha_sel = 0;
int rop_alpha_code = 0xCC;
int x_dir = 1;
int y_dir = 1;
int alpha_r = 0;
int alpha_sel = 0;
int dst_pitch = screen_width * (m_iBpp / 8);
int dst_offset = dst_y0 * dst_pitch + dst_x0 * (m_iBpp / 8);
int src_pitch = screen_width * (m_iBpp / 8);
int src_offset = src_y0 * src_pitch + src_x0 * (m_iBpp / 8);
unsigned int command = 0;
int clip_region = 0;
int clip_en = 1;
int tp_en = 0;
int top = 0;
int bottom = info->var.yres;
int right = info->var.xres;
int fg_color = 0;
int bg_color = 0;
if (src_x0 < 0)
src_x0 = 0;
if (src_y0 < 0)
src_y0 = 0;
if (src_y0 - dst_y0 > 0) {
y_dir = 1;
} else {
y_dir = 0;
src_offset = (src_y0 + aheight) * src_pitch +
src_x0 * (m_iBpp / 8);
dst_offset = (dst_y0 + aheight) * dst_pitch +
dst_x0 * (m_iBpp / 8);
src_y0 += aheight;
dst_y0 += aheight;
}
command = (rop_alpha_sel << 26) | (pat_sel << 18) | (src_sel << 16) |
(x_dir << 20) | (y_dir << 21) | (command << 24) |
(clip_region << 23) | (clip_en << 22) | (tp_en << 27);
src_pitch = (dst_pitch << 16) | src_pitch;
awidth = awidth | (aheight << 16);
alpha_r = ((rop_alpha_code & 0xff) << 8) | (alpha_r & 0xff) |
(alpha_sel << 16);
src_x0 = (src_x0 & 0x1fff) | ((src_y0 & 0x1fff) << 16);
dst_x0 = (dst_x0 & 0x1fff) | ((dst_y0 & 0x1fff) << 16);
bottom = (bottom << 16) | right;
unifb_sync(info);
writel(src_pitch, UGE_PITCH);
writel(src_offset, UGE_SRCSTART);
writel(dst_offset, UGE_DSTSTART);
writel(awidth, UGE_WIDHEIGHT);
writel(top, UGE_CLIP0);
writel(bottom, UGE_CLIP1);
writel(bg_color, UGE_BCOLOR);
writel(fg_color, UGE_FCOLOR);
writel(alpha_r, UGE_ROPALPHA);
writel(src_x0, UGE_SRCXY);
writel(dst_x0, UGE_DSTXY);
writel(command, UGE_COMMAND);
}
static void unifb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
{
struct fb_copyarea modded;
u32 vxres, vyres;
modded.sx = area->sx;
modded.sy = area->sy;
modded.dx = area->dx;
modded.dy = area->dy;
modded.width = area->width;
modded.height = area->height;
if (info->flags & FBINFO_HWACCEL_DISABLED) {
sys_copyarea(info, area);
return;
}
vxres = info->var.xres_virtual;
vyres = info->var.yres_virtual;
if (!modded.width || !modded.height ||
modded.sx >= vxres || modded.sy >= vyres ||
modded.dx >= vxres || modded.dy >= vyres)
return;
if (modded.sx + modded.width > vxres)
modded.width = vxres - modded.sx;
if (modded.dx + modded.width > vxres)
modded.width = vxres - modded.dx;
if (modded.sy + modded.height > vyres)
modded.height = vyres - modded.sy;
if (modded.dy + modded.height > vyres)
modded.height = vyres - modded.dy;
unifb_prim_copyarea(info, &modded);
}
static void unifb_imageblit(struct fb_info *info, const struct fb_image *image)
{
sys_imageblit(info, image);
}
static u_long get_line_length(int xres_virtual, int bpp)
{
u_long length;
length = xres_virtual * bpp;
length = (length + 31) & ~31;
length >>= 3;
return length;
}
/*
* Setting the video mode has been split into two parts.
* First part, xxxfb_check_var, must not write anything
* to hardware, it should only verify and adjust var.
* This means it doesn't alter par but it does use hardware
* data from it to check this var.
*/
static int unifb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
u_long line_length;
/*
* FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal!
* as FB_VMODE_SMOOTH_XPAN is only used internally
*/
if (var->vmode & FB_VMODE_CONUPDATE) {
var->vmode |= FB_VMODE_YWRAP;
var->xoffset = info->var.xoffset;
var->yoffset = info->var.yoffset;
}
/*
* Some very basic checks
*/
if (!var->xres)
var->xres = 1;
if (!var->yres)
var->yres = 1;
if (var->xres > var->xres_virtual)
var->xres_virtual = var->xres;
if (var->yres > var->yres_virtual)
var->yres_virtual = var->yres;
if (var->bits_per_pixel <= 1)
var->bits_per_pixel = 1;
else if (var->bits_per_pixel <= 8)
var->bits_per_pixel = 8;
else if (var->bits_per_pixel <= 16)
var->bits_per_pixel = 16;
else if (var->bits_per_pixel <= 24)
var->bits_per_pixel = 24;
else if (var->bits_per_pixel <= 32)
var->bits_per_pixel = 32;
else
return -EINVAL;
if (var->xres_virtual < var->xoffset + var->xres)
var->xres_virtual = var->xoffset + var->xres;
if (var->yres_virtual < var->yoffset + var->yres)
var->yres_virtual = var->yoffset + var->yres;
/*
* Memory limit
*/
line_length =
get_line_length(var->xres_virtual, var->bits_per_pixel);
if (line_length * var->yres_virtual > UNIFB_MEMSIZE)
return -ENOMEM;
/*
* Now that we checked it we alter var. The reason being is that the
* video mode passed in might not work but slight changes to it might
* make it work. This way we let the user know what is acceptable.
*/
switch (var->bits_per_pixel) {
case 1:
case 8:
var->red.offset = 0;
var->red.length = 8;
var->green.offset = 0;
var->green.length = 8;
var->blue.offset = 0;
var->blue.length = 8;
var->transp.offset = 0;
var->transp.length = 0;
break;
case 16: /* RGBA 5551 */
if (var->transp.length) {
var->red.offset = 0;
var->red.length = 5;
var->green.offset = 5;
var->green.length = 5;
var->blue.offset = 10;
var->blue.length = 5;
var->transp.offset = 15;
var->transp.length = 1;
} else { /* RGB 565 */
var->red.offset = 11;
var->red.length = 5;
var->green.offset = 5;
var->green.length = 6;
var->blue.offset = 0;
var->blue.length = 5;
var->transp.offset = 0;
var->transp.length = 0;
}
break;
case 24: /* RGB 888 */
var->red.offset = 0;
var->red.length = 8;
var->green.offset = 8;
var->green.length = 8;
var->blue.offset = 16;
var->blue.length = 8;
var->transp.offset = 0;
var->transp.length = 0;
break;
case 32: /* RGBA 8888 */
var->red.offset = 16;
var->red.length = 8;
var->green.offset = 8;
var->green.length = 8;
var->blue.offset = 0;
var->blue.length = 8;
var->transp.offset = 24;
var->transp.length = 8;
break;
}
var->red.msb_right = 0;
var->green.msb_right = 0;
var->blue.msb_right = 0;
var->transp.msb_right = 0;
return 0;
}
/*
* This routine actually sets the video mode. It's in here where we
* the hardware state info->par and fix which can be affected by the
* change in par. For this driver it doesn't do much.
*/
static int unifb_set_par(struct fb_info *info)
{
int hTotal, vTotal, hSyncStart, hSyncEnd, vSyncStart, vSyncEnd;
int format;
#ifdef CONFIG_PUV3_PM
struct clk *clk_vga;
u32 pixclk = 0;
int i;
for (i = 0; i <= 10; i++) {
if (info->var.xres == unifb_modes[i].xres
&& info->var.yres == unifb_modes[i].yres
&& info->var.upper_margin == unifb_modes[i].upper_margin
&& info->var.lower_margin == unifb_modes[i].lower_margin
&& info->var.left_margin == unifb_modes[i].left_margin
&& info->var.right_margin == unifb_modes[i].right_margin
&& info->var.hsync_len == unifb_modes[i].hsync_len
&& info->var.vsync_len == unifb_modes[i].vsync_len) {
pixclk = unifb_modes[i].pixclock;
break;
}
}
/* set clock rate */
clk_vga = clk_get(info->device, "VGA_CLK");
if (clk_vga == ERR_PTR(-ENOENT))
return -ENOENT;
if (pixclk != 0) {
if (clk_set_rate(clk_vga, pixclk)) { /* set clock failed */
info->fix = unifb_fix;
info->var = unifb_default;
if (clk_set_rate(clk_vga, unifb_default.pixclock))
return -EINVAL;
}
}
#endif
info->fix.line_length = get_line_length(info->var.xres_virtual,
info->var.bits_per_pixel);
hSyncStart = info->var.xres + info->var.right_margin;
hSyncEnd = hSyncStart + info->var.hsync_len;
hTotal = hSyncEnd + info->var.left_margin;
vSyncStart = info->var.yres + info->var.lower_margin;
vSyncEnd = vSyncStart + info->var.vsync_len;
vTotal = vSyncEnd + info->var.upper_margin;
switch (info->var.bits_per_pixel) {
case 8:
format = UDE_CFG_DST8;
break;
case 16:
format = UDE_CFG_DST16;
break;
case 24:
format = UDE_CFG_DST24;
break;
case 32:
format = UDE_CFG_DST32;
break;
default:
return -EINVAL;
}
writel(info->fix.smem_start, UDE_FSA);
writel(info->var.yres, UDE_LS);
writel(get_line_length(info->var.xres,
info->var.bits_per_pixel) >> 3, UDE_PS);
/* >> 3 for hardware required. */
writel((hTotal << 16) | (info->var.xres), UDE_HAT);
writel(((hTotal - 1) << 16) | (info->var.xres - 1), UDE_HBT);
writel(((hSyncEnd - 1) << 16) | (hSyncStart - 1), UDE_HST);
writel((vTotal << 16) | (info->var.yres), UDE_VAT);
writel(((vTotal - 1) << 16) | (info->var.yres - 1), UDE_VBT);
writel(((vSyncEnd - 1) << 16) | (vSyncStart - 1), UDE_VST);
writel(UDE_CFG_GDEN_ENABLE | UDE_CFG_TIMEUP_ENABLE
| format | 0xC0000001, UDE_CFG);
return 0;
}
/*
* Set a single color register. The values supplied are already
* rounded down to the hardware's capabilities (according to the
* entries in the var structure). Return != 0 for invalid regno.
*/
static int unifb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info)
{
if (regno >= 256) /* no. of hw registers */
return 1;
/* grayscale works only partially under directcolor */
if (info->var.grayscale) {
/* grayscale = 0.30*R + 0.59*G + 0.11*B */
red = green = blue =
(red * 77 + green * 151 + blue * 28) >> 8;
}
#define CNVT_TOHW(val, width) ((((val)<<(width))+0x7FFF-(val))>>16)
switch (info->fix.visual) {
case FB_VISUAL_TRUECOLOR:
case FB_VISUAL_PSEUDOCOLOR:
red = CNVT_TOHW(red, info->var.red.length);
green = CNVT_TOHW(green, info->var.green.length);
blue = CNVT_TOHW(blue, info->var.blue.length);
transp = CNVT_TOHW(transp, info->var.transp.length);
break;
case FB_VISUAL_DIRECTCOLOR:
red = CNVT_TOHW(red, 8); /* expect 8 bit DAC */
green = CNVT_TOHW(green, 8);
blue = CNVT_TOHW(blue, 8);
/* hey, there is bug in transp handling... */
transp = CNVT_TOHW(transp, 8);
break;
}
#undef CNVT_TOHW
/* Truecolor has hardware independent palette */
if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
u32 v;
if (regno >= 16)
return 1;
v = (red << info->var.red.offset) |
(green << info->var.green.offset) |
(blue << info->var.blue.offset) |
(transp << info->var.transp.offset);
switch (info->var.bits_per_pixel) {
case 8:
break;
case 16:
case 24:
case 32:
((u32 *) (info->pseudo_palette))[regno] = v;
break;
default:
return 1;
}
return 0;
}
return 0;
}
/*
* Pan or Wrap the Display
*
* This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
*/
static int unifb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *info)
{
if (var->vmode & FB_VMODE_YWRAP) {
if (var->yoffset < 0
|| var->yoffset >= info->var.yres_virtual
|| var->xoffset)
return -EINVAL;
} else {
if (var->xoffset + info->var.xres > info->var.xres_virtual ||
var->yoffset + info->var.yres > info->var.yres_virtual)
return -EINVAL;
}
info->var.xoffset = var->xoffset;
info->var.yoffset = var->yoffset;
if (var->vmode & FB_VMODE_YWRAP)
info->var.vmode |= FB_VMODE_YWRAP;
else
info->var.vmode &= ~FB_VMODE_YWRAP;
return 0;
}
int unifb_mmap(struct fb_info *info,
struct vm_area_struct *vma)
{
unsigned long size = vma->vm_end - vma->vm_start;
unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
unsigned long pos = info->fix.smem_start + offset;
if (offset + size > info->fix.smem_len)
return -EINVAL;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
if (io_remap_pfn_range(vma, vma->vm_start, pos >> PAGE_SHIFT, size,
vma->vm_page_prot))
return -EAGAIN;
vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
return 0;
}
static struct fb_ops unifb_ops = {
.fb_read = fb_sys_read,
.fb_write = fb_sys_write,
.fb_check_var = unifb_check_var,
.fb_set_par = unifb_set_par,
.fb_setcolreg = unifb_setcolreg,
.fb_pan_display = unifb_pan_display,
.fb_fillrect = unifb_fillrect,
.fb_copyarea = unifb_copyarea,
.fb_imageblit = unifb_imageblit,
.fb_mmap = unifb_mmap,
};
/*
* Initialisation
*/
static int unifb_probe(struct platform_device *dev)
{
struct fb_info *info;
u32 unifb_regs[UNIFB_REGS_NUM];
int retval = -ENOMEM;
struct resource *iomem;
void *videomemory;
videomemory = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP,
get_order(UNIFB_MEMSIZE));
if (!videomemory)
goto err;
memset(videomemory, 0, UNIFB_MEMSIZE);
unifb_fix.smem_start = virt_to_phys(videomemory);
unifb_fix.smem_len = UNIFB_MEMSIZE;
iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
unifb_fix.mmio_start = iomem->start;
info = framebuffer_alloc(sizeof(u32)*256, &dev->dev);
if (!info)
goto err;
info->screen_base = (char __iomem *)videomemory;
info->fbops = &unifb_ops;
retval = fb_find_mode(&info->var, info, NULL,
unifb_modes, 10, &unifb_modes[0], 16);
if (!retval || (retval == 4))
info->var = unifb_default;
info->fix = unifb_fix;
info->pseudo_palette = info->par;
info->par = NULL;
info->flags = FBINFO_FLAG_DEFAULT;
#ifdef FB_ACCEL_PUV3_UNIGFX
info->fix.accel = FB_ACCEL_PUV3_UNIGFX;
#endif
retval = fb_alloc_cmap(&info->cmap, 256, 0);
if (retval < 0)
goto err1;
retval = register_framebuffer(info);
if (retval < 0)
goto err2;
platform_set_drvdata(dev, info);
platform_device_add_data(dev, unifb_regs, sizeof(u32) * UNIFB_REGS_NUM);
printk(KERN_INFO
"fb%d: Virtual frame buffer device, using %dM of video memory\n",
info->node, UNIFB_MEMSIZE >> 20);
return 0;
err2:
fb_dealloc_cmap(&info->cmap);
err1:
framebuffer_release(info);
err:
return retval;
}
static int unifb_remove(struct platform_device *dev)
{
struct fb_info *info = platform_get_drvdata(dev);
if (info) {
unregister_framebuffer(info);
fb_dealloc_cmap(&info->cmap);
framebuffer_release(info);
}
return 0;
}
#ifdef CONFIG_PM
static int unifb_resume(struct platform_device *dev)
{
int rc = 0;
u32 *unifb_regs = dev->dev.platform_data;
if (dev->dev.power.power_state.event == PM_EVENT_ON)
return 0;
console_lock();
if (dev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
writel(unifb_regs[0], UDE_FSA);
writel(unifb_regs[1], UDE_LS);
writel(unifb_regs[2], UDE_PS);
writel(unifb_regs[3], UDE_HAT);
writel(unifb_regs[4], UDE_HBT);
writel(unifb_regs[5], UDE_HST);
writel(unifb_regs[6], UDE_VAT);
writel(unifb_regs[7], UDE_VBT);
writel(unifb_regs[8], UDE_VST);
writel(unifb_regs[9], UDE_CFG);
}
dev->dev.power.power_state = PMSG_ON;
console_unlock();
return rc;
}
static int unifb_suspend(struct platform_device *dev, pm_message_t mesg)
{
u32 *unifb_regs = dev->dev.platform_data;
unifb_regs[0] = readl(UDE_FSA);
unifb_regs[1] = readl(UDE_LS);
unifb_regs[2] = readl(UDE_PS);
unifb_regs[3] = readl(UDE_HAT);
unifb_regs[4] = readl(UDE_HBT);
unifb_regs[5] = readl(UDE_HST);
unifb_regs[6] = readl(UDE_VAT);
unifb_regs[7] = readl(UDE_VBT);
unifb_regs[8] = readl(UDE_VST);
unifb_regs[9] = readl(UDE_CFG);
if (mesg.event == dev->dev.power.power_state.event)
return 0;
switch (mesg.event) {
case PM_EVENT_FREEZE: /* about to take snapshot */
case PM_EVENT_PRETHAW: /* before restoring snapshot */
goto done;
}
console_lock();
/* do nothing... */
console_unlock();
done:
dev->dev.power.power_state = mesg;
return 0;
}
#else
#define unifb_resume NULL
#define unifb_suspend NULL
#endif
static struct platform_driver unifb_driver = {
.probe = unifb_probe,
.remove = unifb_remove,
.resume = unifb_resume,
.suspend = unifb_suspend,
.driver = {
.name = "PKUnity-v3-UNIGFX",
},
};
static int __init unifb_init(void)
{
#ifndef MODULE
if (fb_get_options("unifb", NULL))
return -ENODEV;
#endif
return platform_driver_register(&unifb_driver);
}
module_init(unifb_init);
static void __exit unifb_exit(void)
{
platform_driver_unregister(&unifb_driver);
}
module_exit(unifb_exit);
MODULE_LICENSE("GPL v2");
