linux/drivers/video/wmt_ge_rops.c
<<
>>
Prefs
   1/*
   2 *  linux/drivers/video/wmt_ge_rops.c
   3 *
   4 *  Accelerators for raster operations using WonderMedia Graphics Engine
   5 *
   6 *  Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
   7 *
   8 * This software is licensed under the terms of the GNU General Public
   9 * License version 2, as published by the Free Software Foundation, and
  10 * may be copied, distributed, and modified under those terms.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 */
  17
  18#include <linux/module.h>
  19#include <linux/fb.h>
  20#include <linux/platform_device.h>
  21#include "fb_draw.h"
  22
  23#define GE_COMMAND_OFF          0x00
  24#define GE_DEPTH_OFF            0x04
  25#define GE_HIGHCOLOR_OFF        0x08
  26#define GE_ROPCODE_OFF          0x14
  27#define GE_FIRE_OFF             0x18
  28#define GE_SRCBASE_OFF          0x20
  29#define GE_SRCDISPW_OFF         0x24
  30#define GE_SRCDISPH_OFF         0x28
  31#define GE_SRCAREAX_OFF         0x2c
  32#define GE_SRCAREAY_OFF         0x30
  33#define GE_SRCAREAW_OFF         0x34
  34#define GE_SRCAREAH_OFF         0x38
  35#define GE_DESTBASE_OFF         0x3c
  36#define GE_DESTDISPW_OFF        0x40
  37#define GE_DESTDISPH_OFF        0x44
  38#define GE_DESTAREAX_OFF        0x48
  39#define GE_DESTAREAY_OFF        0x4c
  40#define GE_DESTAREAW_OFF        0x50
  41#define GE_DESTAREAH_OFF        0x54
  42#define GE_PAT0C_OFF            0x88    /* Pattern 0 color */
  43#define GE_ENABLE_OFF           0xec
  44#define GE_INTEN_OFF            0xf0
  45#define GE_STATUS_OFF           0xf8
  46
  47static void __iomem *regbase;
  48
  49void wmt_ge_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
  50{
  51        unsigned long fg, pat;
  52
  53        if (p->state != FBINFO_STATE_RUNNING)
  54                return;
  55
  56        if (p->fix.visual == FB_VISUAL_TRUECOLOR ||
  57            p->fix.visual == FB_VISUAL_DIRECTCOLOR)
  58                fg = ((u32 *) (p->pseudo_palette))[rect->color];
  59        else
  60                fg = rect->color;
  61
  62        pat = pixel_to_pat(p->var.bits_per_pixel, fg);
  63
  64        if (p->fbops->fb_sync)
  65                p->fbops->fb_sync(p);
  66
  67        writel(p->var.bits_per_pixel == 32 ? 3 :
  68              (p->var.bits_per_pixel == 8 ? 0 : 1), regbase + GE_DEPTH_OFF);
  69        writel(p->var.bits_per_pixel == 15 ? 1 : 0, regbase + GE_HIGHCOLOR_OFF);
  70        writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF);
  71        writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF);
  72        writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF);
  73        writel(rect->dx, regbase + GE_DESTAREAX_OFF);
  74        writel(rect->dy, regbase + GE_DESTAREAY_OFF);
  75        writel(rect->width - 1, regbase + GE_DESTAREAW_OFF);
  76        writel(rect->height - 1, regbase + GE_DESTAREAH_OFF);
  77
  78        writel(pat, regbase + GE_PAT0C_OFF);
  79        writel(1, regbase + GE_COMMAND_OFF);
  80        writel(rect->rop == ROP_XOR ? 0x5a : 0xf0, regbase + GE_ROPCODE_OFF);
  81        writel(1, regbase + GE_FIRE_OFF);
  82}
  83EXPORT_SYMBOL_GPL(wmt_ge_fillrect);
  84
  85void wmt_ge_copyarea(struct fb_info *p, const struct fb_copyarea *area)
  86{
  87        if (p->state != FBINFO_STATE_RUNNING)
  88                return;
  89
  90        if (p->fbops->fb_sync)
  91                p->fbops->fb_sync(p);
  92
  93        writel(p->var.bits_per_pixel > 16 ? 3 :
  94              (p->var.bits_per_pixel > 8 ? 1 : 0), regbase + GE_DEPTH_OFF);
  95
  96        writel(p->fix.smem_start, regbase + GE_SRCBASE_OFF);
  97        writel(p->var.xres_virtual - 1, regbase + GE_SRCDISPW_OFF);
  98        writel(p->var.yres_virtual - 1, regbase + GE_SRCDISPH_OFF);
  99        writel(area->sx, regbase + GE_SRCAREAX_OFF);
 100        writel(area->sy, regbase + GE_SRCAREAY_OFF);
 101        writel(area->width - 1, regbase + GE_SRCAREAW_OFF);
 102        writel(area->height - 1, regbase + GE_SRCAREAH_OFF);
 103
 104        writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF);
 105        writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF);
 106        writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF);
 107        writel(area->dx, regbase + GE_DESTAREAX_OFF);
 108        writel(area->dy, regbase + GE_DESTAREAY_OFF);
 109        writel(area->width - 1, regbase + GE_DESTAREAW_OFF);
 110        writel(area->height - 1, regbase + GE_DESTAREAH_OFF);
 111
 112        writel(0xcc, regbase + GE_ROPCODE_OFF);
 113        writel(1, regbase + GE_COMMAND_OFF);
 114        writel(1, regbase + GE_FIRE_OFF);
 115}
 116EXPORT_SYMBOL_GPL(wmt_ge_copyarea);
 117
 118int wmt_ge_sync(struct fb_info *p)
 119{
 120        int loops = 5000000;
 121        while ((readl(regbase + GE_STATUS_OFF) & 4) && --loops)
 122                cpu_relax();
 123        return loops > 0 ? 0 : -EBUSY;
 124}
 125EXPORT_SYMBOL_GPL(wmt_ge_sync);
 126
 127static int __devinit wmt_ge_rops_probe(struct platform_device *pdev)
 128{
 129        struct resource *res;
 130
 131        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 132        if (res == NULL) {
 133                dev_err(&pdev->dev, "no I/O memory resource defined\n");
 134                return -ENODEV;
 135        }
 136
 137        /* Only one ROP engine is presently supported. */
 138        if (unlikely(regbase)) {
 139                WARN_ON(1);
 140                return -EBUSY;
 141        }
 142
 143        regbase = ioremap(res->start, resource_size(res));
 144        if (regbase == NULL) {
 145                dev_err(&pdev->dev, "failed to map I/O memory\n");
 146                return -EBUSY;
 147        }
 148
 149        writel(1, regbase + GE_ENABLE_OFF);
 150        printk(KERN_INFO "Enabled support for WMT GE raster acceleration\n");
 151
 152        return 0;
 153}
 154
 155static int __devexit wmt_ge_rops_remove(struct platform_device *pdev)
 156{
 157        iounmap(regbase);
 158        return 0;
 159}
 160
 161static const struct of_device_id wmt_dt_ids[] = {
 162        { .compatible = "wm,prizm-ge-rops", },
 163        { /* sentinel */ }
 164};
 165
 166static struct platform_driver wmt_ge_rops_driver = {
 167        .probe          = wmt_ge_rops_probe,
 168        .remove         = __devexit_p(wmt_ge_rops_remove),
 169        .driver         = {
 170                .owner  = THIS_MODULE,
 171                .name   = "wmt_ge_rops",
 172                .of_match_table = of_match_ptr(wmt_dt_ids),
 173        },
 174};
 175
 176module_platform_driver(wmt_ge_rops_driver);
 177
 178MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com");
 179MODULE_DESCRIPTION("Accelerators for raster operations using "
 180                   "WonderMedia Graphics Engine");
 181MODULE_LICENSE("GPL v2");
 182MODULE_DEVICE_TABLE(of, wmt_dt_ids);
 183
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.