mb862xxfb_accel.c

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/*
 * drivers/mb862xx/mb862xxfb_accel.c
 *
 * Fujitsu Carmine/Coral-P(A)/Lime framebuffer driver acceleration support
 *
 * (C) 2007 Alexander Shishkin <[email protected]>
 * (C) 2009 Valentin Sitdikov <[email protected]>
 * (C) 2009 Siemens AG
 *
 * 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/fb.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>
#if defined(CONFIG_OF)
#include <linux/of_platform.h>
#endif
#include "mb862xxfb.h"
#include "mb862xx_reg.h"
#include "mb862xxfb_accel.h"

static void mb862xxfb_write_fifo(u32 count, u32 *data, struct fb_info *info)
{
    struct mb862xxfb_par *par = info->par;
    static u32 free;

    u32 total = 0;
    while (total < count) {
        if (free) {
            outreg(geo, GDC_GEO_REG_INPUT_FIFO, data[total]);
            total++;
            free--;
        } else {
            free = (u32) inreg(draw, GDC_REG_FIFO_COUNT);
        }
    }
}

static void mb86290fb_copyarea(struct fb_info *info,
                   const struct fb_copyarea *area)
{
    __u32 cmd[6];

    cmd[0] = (GDC_TYPE_SETREGISTER << 24) | (1 << 16) | GDC_REG_MODE_BITMAP;
    /* Set raster operation */
    cmd[1] = (2 << 7) | (GDC_ROP_COPY << 9);
    cmd[2] = GDC_TYPE_BLTCOPYP << 24;

    if (area->sx >= area->dx && area->sy >= area->dy)
        cmd[2] |= GDC_CMD_BLTCOPY_TOP_LEFT << 16;
    else if (area->sx >= area->dx && area->sy <= area->dy)
        cmd[2] |= GDC_CMD_BLTCOPY_BOTTOM_LEFT << 16;
    else if (area->sx <= area->dx && area->sy >= area->dy)
        cmd[2] |= GDC_CMD_BLTCOPY_TOP_RIGHT << 16;
    else
        cmd[2] |= GDC_CMD_BLTCOPY_BOTTOM_RIGHT << 16;

    cmd[3] = (area->sy << 16) | area->sx;
    cmd[4] = (area->dy << 16) | area->dx;
    cmd[5] = (area->height << 16) | area->width;
    mb862xxfb_write_fifo(6, cmd, info);
}

/*
 * Fill in the cmd array /GDC FIFO commands/ to draw a 1bit image.
 * Make sure cmd has enough room!
 */
static void mb86290fb_imageblit1(u32 *cmd, u16 step, u16 dx, u16 dy,
                 u16 width, u16 height, u32 fgcolor,
                 u32 bgcolor, const struct fb_image *image,
                 struct fb_info *info)
{
    int i;
    unsigned const char *line;
    u16 bytes;

    /* set colors and raster operation regs */
    cmd[0] = (GDC_TYPE_SETREGISTER << 24) | (1 << 16) | GDC_REG_MODE_BITMAP;
    /* Set raster operation */
    cmd[1] = (2 << 7) | (GDC_ROP_COPY << 9);
    cmd[2] =
        (GDC_TYPE_SETCOLORREGISTER << 24) | (GDC_CMD_BODY_FORE_COLOR << 16);
    cmd[3] = fgcolor;
    cmd[4] =
        (GDC_TYPE_SETCOLORREGISTER << 24) | (GDC_CMD_BODY_BACK_COLOR << 16);
    cmd[5] = bgcolor;

    i = 0;
    line = image->data;
    bytes = (image->width + 7) >> 3;

    /* and the image */
    cmd[6] = (GDC_TYPE_DRAWBITMAPP << 24) |
        (GDC_CMD_BITMAP << 16) | (2 + (step * height));
    cmd[7] = (dy << 16) | dx;
    cmd[8] = (height << 16) | width;

    while (i < height) {
        memcpy(&cmd[9 + i * step], line, step << 2);
#ifdef __LITTLE_ENDIAN
        {
            int k = 0;
            for (k = 0; k < step; k++)
                cmd[9 + i * step + k] =
                    cpu_to_be32(cmd[9 + i * step + k]);
        }
#endif
        line += bytes;
        i++;
    }
}

/*
 * Fill in the cmd array /GDC FIFO commands/ to draw a 8bit image.
 * Make sure cmd has enough room!
 */
static void mb86290fb_imageblit8(u32 *cmd, u16 step, u16 dx, u16 dy,
                 u16 width, u16 height, u32 fgcolor,
                 u32 bgcolor, const struct fb_image *image,
                 struct fb_info *info)
{
    int i, j;
    unsigned const char *line, *ptr;
    u16 bytes;

    cmd[0] = (GDC_TYPE_DRAWBITMAPP << 24) |
        (GDC_CMD_BLT_DRAW << 16) | (2 + (height * step));
    cmd[1] = (dy << 16) | dx;
    cmd[2] = (height << 16) | width;

    i = 0;
    line = ptr = image->data;
    bytes = image->width;

    while (i < height) {
        ptr = line;
        for (j = 0; j < step; j++) {
            cmd[3 + i * step + j] =
                (((u32 *) (info->pseudo_palette))[*ptr]) & 0xffff;
            ptr++;
            cmd[3 + i * step + j] |=
                ((((u32 *) (info->
                    pseudo_palette))[*ptr]) & 0xffff) << 16;
            ptr++;
        }

        line += bytes;
        i++;
    }
}

/*
 * Fill in the cmd array /GDC FIFO commands/ to draw a 16bit image.
 * Make sure cmd has enough room!
 */
static void mb86290fb_imageblit16(u32 *cmd, u16 step, u16 dx, u16 dy,
                  u16 width, u16 height, u32 fgcolor,
                  u32 bgcolor, const struct fb_image *image,
                  struct fb_info *info)
{
    int i;
    unsigned const char *line;
    u16 bytes;

    i = 0;
    line = image->data;
    bytes = image->width << 1;

    cmd[0] = (GDC_TYPE_DRAWBITMAPP << 24) |
        (GDC_CMD_BLT_DRAW << 16) | (2 + step * height);
    cmd[1] = (dy << 16) | dx;
    cmd[2] = (height << 16) | width;

    while (i < height) {
        memcpy(&cmd[3 + i * step], line, step);
        line += bytes;
        i++;
    }
}

static void mb86290fb_imageblit(struct fb_info *info,
                const struct fb_image *image)
{
    int mdr;
    u32 *cmd = NULL;
    void (*cmdfn) (u32 *, u16, u16, u16, u16, u16, u32, u32,
               const struct fb_image *, struct fb_info *) = NULL;
    u32 cmdlen;
    u32 fgcolor = 0, bgcolor = 0;
    u16 step;

    u16 width = image->width, height = image->height;
    u16 dx = image->dx, dy = image->dy;
    int x2, y2, vxres, vyres;

    mdr = (GDC_ROP_COPY << 9);
    x2 = image->dx + image->width;
    y2 = image->dy + image->height;
    vxres = info->var.xres_virtual;
    vyres = info->var.yres_virtual;
    x2 = min(x2, vxres);
    y2 = min(y2, vyres);
    width = x2 - dx;
    height = y2 - dy;

    switch (image->depth) {
    case 1:
        step = (width + 31) >> 5;
        cmdlen = 9 + height * step;
        cmdfn = mb86290fb_imageblit1;
        if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
            info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
            fgcolor =
                ((u32 *) (info->pseudo_palette))[image->fg_color];
            bgcolor =
                ((u32 *) (info->pseudo_palette))[image->bg_color];
        } else {
            fgcolor = image->fg_color;
            bgcolor = image->bg_color;
        }

        break;

    case 8:
        step = (width + 1) >> 1;
        cmdlen = 3 + height * step;
        cmdfn = mb86290fb_imageblit8;
        break;

    case 16:
        step = (width + 1) >> 1;
        cmdlen = 3 + height * step;
        cmdfn = mb86290fb_imageblit16;
        break;

    default:
        cfb_imageblit(info, image);
        return;
    }

    cmd = kmalloc(cmdlen * 4, GFP_DMA);
    if (!cmd)
        return cfb_imageblit(info, image);
    cmdfn(cmd, step, dx, dy, width, height, fgcolor, bgcolor, image, info);
    mb862xxfb_write_fifo(cmdlen, cmd, info);
    kfree(cmd);
}

static void mb86290fb_fillrect(struct fb_info *info,
                   const struct fb_fillrect *rect)
{

    u32 x2, y2, vxres, vyres, height, width, fg;
    u32 cmd[7];

    vxres = info->var.xres_virtual;
    vyres = info->var.yres_virtual;

    if (!rect->width || !rect->height || rect->dx > vxres
        || rect->dy > vyres)
        return;

    /* We could use hardware clipping but on many cards you get around
     * hardware clipping by writing to framebuffer directly. */
    x2 = rect->dx + rect->width;
    y2 = rect->dy + rect->height;
    x2 = min(x2, vxres);
    y2 = min(y2, vyres);
    width = x2 - rect->dx;
    height = y2 - rect->dy;
    if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
        info->fix.visual == FB_VISUAL_DIRECTCOLOR)
        fg = ((u32 *) (info->pseudo_palette))[rect->color];
    else
        fg = rect->color;

    switch (rect->rop) {

    case ROP_XOR:
        /* Set raster operation */
        cmd[1] = (2 << 7) | (GDC_ROP_XOR << 9);
        break;

    case ROP_COPY:
        /* Set raster operation */
        cmd[1] = (2 << 7) | (GDC_ROP_COPY << 9);
        break;

    }

    cmd[0] = (GDC_TYPE_SETREGISTER << 24) | (1 << 16) | GDC_REG_MODE_BITMAP;
    /* cmd[1] set earlier */
    cmd[2] =
        (GDC_TYPE_SETCOLORREGISTER << 24) | (GDC_CMD_BODY_FORE_COLOR << 16);
    cmd[3] = fg;
    cmd[4] = (GDC_TYPE_DRAWRECTP << 24) | (GDC_CMD_BLT_FILL << 16);
    cmd[5] = (rect->dy << 16) | (rect->dx);
    cmd[6] = (height << 16) | width;

    mb862xxfb_write_fifo(7, cmd, info);
}

void mb862xxfb_init_accel(struct fb_info *info, int xres)
{
    struct mb862xxfb_par *par = info->par;

    if (info->var.bits_per_pixel == 32) {
        info->fbops->fb_fillrect = cfb_fillrect;
        info->fbops->fb_copyarea = cfb_copyarea;
        info->fbops->fb_imageblit = cfb_imageblit;
    } else {
        outreg(disp, GC_L0EM, 3);
        info->fbops->fb_fillrect = mb86290fb_fillrect;
        info->fbops->fb_copyarea = mb86290fb_copyarea;
        info->fbops->fb_imageblit = mb86290fb_imageblit;
    }
    outreg(draw, GDC_REG_DRAW_BASE, 0);
    outreg(draw, GDC_REG_MODE_MISC, 0x8000);
    outreg(draw, GDC_REG_X_RESOLUTION, xres);

    info->flags |=
        FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
        FBINFO_HWACCEL_IMAGEBLIT;
    info->fix.accel = 0xff; /*FIXME: add right define */
}
EXPORT_SYMBOL(mb862xxfb_init_accel);

MODULE_LICENSE("GPL v2");