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    Subject[PATCH 15/17] unicore32 machine related: add frame buffer driver for pkunity-v3 soc
    Date
    From: GuanXuetao <gxt@mprc.pku.edu.cn>

    change from original version -- by advice of Paul Mundt
    1. remove videomemorysize definitions
    2. remove unifb_enable and unifb_setup
    3. use dev_warn instead of printk in fb driver
    4. remove judgement for FB_ACCEL_PUV3_UNIGFX
    5. adjust clk_get and clk_set_rate calls
    6. add resources definitions
    7. remove unifb_option
    8. adjust register for platform_device
    9. adjust unifb_ops position and unifb_regs assignment position

    Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
    ---
    MAINTAINERS | 1 +
    arch/unicore32/configs/debug_defconfig | 3 +-
    arch/unicore32/include/mach/memory.h | 2 +-
    arch/unicore32/kernel/puv3-core.c | 15 +
    drivers/video/Kconfig | 11 +
    drivers/video/Makefile | 1 +
    drivers/video/fb-puv3.c | 846 ++++++++++++++++++++++++++++++++
    include/linux/fb.h | 2 +
    8 files changed, 879 insertions(+), 2 deletions(-)
    create mode 100644 drivers/video/fb-puv3.c

    diff --git a/MAINTAINERS b/MAINTAINERS
    index 1058d59..c44a484 100644
    --- a/MAINTAINERS
    +++ b/MAINTAINERS
    @@ -4889,6 +4889,7 @@ S: Maintained
    T: git git://git.kernel.org/pub/scm/linux/kernel/git/epip/linux-2.6-unicore32.git
    F: drivers/input/serio/i8042-unicore32io.h
    F: drivers/i2c/busses/i2c-puv3.c
    +F: drivers/video/fb-puv3.c

    PMC SIERRA MaxRAID DRIVER
    M: Anil Ravindranath <anil_ravindranath@pmc-sierra.com>
    diff --git a/arch/unicore32/configs/debug_defconfig b/arch/unicore32/configs/debug_defconfig
    index bf42abd..b5fbde9 100644
    --- a/arch/unicore32/configs/debug_defconfig
    +++ b/arch/unicore32/configs/debug_defconfig
    @@ -66,7 +66,6 @@ CONFIG_LCD_BACKLIGHT=n

    CONFIG_PUV3_RTC=y
    CONFIG_PUV3_UMAL=y
    -CONFIG_PUV3_UNIGFX=y
    CONFIG_PUV3_MUSB=n
    CONFIG_PUV3_AC97=n
    CONFIG_PUV3_NAND=n
    @@ -130,6 +129,8 @@ CONFIG_VIDEO_DEV=n
    CONFIG_USB_VIDEO_CLASS=n

    # Graphics support
    +CONFIG_FB=y
    +CONFIG_FB_PUV3_UNIGFX=y
    # Console display driver support
    CONFIG_VGA_CONSOLE=n
    CONFIG_FRAMEBUFFER_CONSOLE=y
    diff --git a/arch/unicore32/include/mach/memory.h b/arch/unicore32/include/mach/memory.h
    index 541949d..b774eff 100644
    --- a/arch/unicore32/include/mach/memory.h
    +++ b/arch/unicore32/include/mach/memory.h
    @@ -50,7 +50,7 @@ void puv3_pci_adjust_zones(unsigned long *size, unsigned long *holes);

    /* kuser area */
    #define KUSER_VECPAGE_BASE (KUSER_BASE + UL(0x3fff0000))
    -#define KUSER_UNIGFX_BASE (KUSER_BASE + PKUNITY_UNIGFX_MMAP_BASE)
    +#define KUSER_UNIGFX_BASE (PAGE_OFFSET + PKUNITY_UNIGFX_MMAP_BASE)
    /* kuser_vecpage (0xbfff0000) is ro, and vectors page (0xffff0000) is rw */
    #define kuser_vecpage_to_vectors(x) ((x) - (KUSER_VECPAGE_BASE) \
    + (VECTORS_BASE))
    diff --git a/arch/unicore32/kernel/puv3-core.c b/arch/unicore32/kernel/puv3-core.c
    index 6edf928..7d10e7b 100644
    --- a/arch/unicore32/kernel/puv3-core.c
    +++ b/arch/unicore32/kernel/puv3-core.c
    @@ -93,6 +93,19 @@ static struct resource puv3_mmc_resources[] = {
    },
    };

    +static struct resource puv3_unigfx_resources[] = {
    + [0] = {
    + .start = PKUNITY_UNIGFX_BASE,
    + .end = PKUNITY_UNIGFX_BASE + 0xfff,
    + .flags = IORESOURCE_MEM,
    + },
    + [1] = {
    + .start = PKUNITY_UNIGFX_MMAP_BASE,
    + .end = PKUNITY_UNIGFX_MMAP_BASE + PKUNITY_UNIGFX_MMAP_SIZE,
    + .flags = IORESOURCE_MEM,
    + },
    +};
    +
    static struct resource puv3_rtc_resources[] = {
    [0] = {
    .start = PKUNITY_RTC_BASE,
    @@ -256,6 +269,8 @@ void __init puv3_core_init(void)
    puv3_umal_resources, ARRAY_SIZE(puv3_umal_resources));
    platform_device_register_simple("PKUnity-v3-MMC", -1,
    puv3_mmc_resources, ARRAY_SIZE(puv3_mmc_resources));
    + platform_device_register_simple("PKUnity-v3-UNIGFX", -1,
    + puv3_unigfx_resources, ARRAY_SIZE(puv3_unigfx_resources));
    platform_device_register_simple("PKUnity-v3-PWM", -1,
    puv3_pwm_resources, ARRAY_SIZE(puv3_pwm_resources));
    platform_device_register_simple("PKUnity-v3-UART", 0,
    diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
    index 6bafb51b..ec55a87 100644
    --- a/drivers/video/Kconfig
    +++ b/drivers/video/Kconfig
    @@ -2365,6 +2365,17 @@ config FB_JZ4740
    help
    Framebuffer support for the JZ4740 SoC.

    +config FB_PUV3_UNIGFX
    + tristate "PKUnity v3 Unigfx framebuffer support"
    + depends on FB && UNICORE32 && ARCH_PUV3
    + select FB_SYS_FILLRECT
    + select FB_SYS_COPYAREA
    + select FB_SYS_IMAGEBLIT
    + select FB_SYS_FOPS
    + help
    + Choose this option if you want to use the Unigfx device as a
    + framebuffer device. Without the support of PCI & AGP.
    +
    source "drivers/video/omap/Kconfig"
    source "drivers/video/omap2/Kconfig"

    diff --git a/drivers/video/Makefile b/drivers/video/Makefile
    index 8c8fabd..b0eb3da 100644
    --- a/drivers/video/Makefile
    +++ b/drivers/video/Makefile
    @@ -139,6 +139,7 @@ obj-$(CONFIG_FB_MB862XX) += mb862xx/
    obj-$(CONFIG_FB_MSM) += msm/
    obj-$(CONFIG_FB_NUC900) += nuc900fb.o
    obj-$(CONFIG_FB_JZ4740) += jz4740_fb.o
    +obj-$(CONFIG_FB_PUV3_UNIGFX) += fb-puv3.o

    # Platform or fallback drivers go here
    obj-$(CONFIG_FB_UVESA) += uvesafb.o
    diff --git a/drivers/video/fb-puv3.c b/drivers/video/fb-puv3.c
    new file mode 100644
    index 0000000..dbd2dc4
    --- /dev/null
    +++ b/drivers/video/fb-puv3.c
    @@ -0,0 +1,846 @@
    +/*
    + * 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/vmalloc.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(PKUNITY_UNIGFX_MMAP_BASE, 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 + var->xres > info->var.xres_virtual ||
    + var->yoffset + 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, *mapmem;
    +
    + info = framebuffer_alloc(sizeof(u32)*256, &dev->dev);
    + if (!info)
    + goto err;
    +
    + info->screen_base = (char __iomem *)KUSER_UNIGFX_BASE;
    + 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;
    +
    + iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
    + unifb_fix.mmio_start = iomem->start;
    +
    + mapmem = platform_get_resource(dev, IORESOURCE_MEM, 1);
    + unifb_fix.smem_start = mapmem->start;
    + unifb_fix.smem_len = UNIFB_MEMSIZE;
    +
    + 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");
    diff --git a/include/linux/fb.h b/include/linux/fb.h
    index 68ba85a..b2a3639 100644
    --- a/include/linux/fb.h
    +++ b/include/linux/fb.h
    @@ -152,6 +152,8 @@
    #define FB_ACCEL_PROSAVAGE_DDR 0x8d /* S3 ProSavage DDR */
    #define FB_ACCEL_PROSAVAGE_DDRK 0x8e /* S3 ProSavage DDR-K */

    +#define FB_ACCEL_PUV3_UNIGFX 0xa0 /* PKUnity-v3 Unigfx */
    +
    struct fb_fix_screeninfo {
    char id[16]; /* identification string eg "TT Builtin" */
    unsigned long smem_start; /* Start of frame buffer mem */
    --
    1.7.4.1


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      Last update: 2011-02-27 17:05    [W:0.079 / U:0.172 seconds]
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