| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * 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 |
| */ |
| |
| #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 <linux/mm.h> |
| |
| #include <linux/sizes.h> |
| #include <asm/pgtable.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 const 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) |
| { |
| vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
| |
| return vm_iomap_memory(vma, info->fix.smem_start, info->fix.smem_len); |
| } |
| |
| 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); |
| |
| fb_info(info, "Virtual frame buffer device, using %dM of video memory\n", |
| 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"); |