/* * linux/drivers/video/wmt_ge_rops.c * * Accelerators for raster operations using WonderMedia Graphics Engine * * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com> * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/module.h> #include <linux/fb.h> #include <linux/platform_device.h> #include "fb_draw.h" #define GE_COMMAND_OFF 0x00 #define GE_DEPTH_OFF 0x04 #define GE_HIGHCOLOR_OFF 0x08 #define GE_ROPCODE_OFF 0x14 #define GE_FIRE_OFF 0x18 #define GE_SRCBASE_OFF 0x20 #define GE_SRCDISPW_OFF 0x24 #define GE_SRCDISPH_OFF 0x28 #define GE_SRCAREAX_OFF 0x2c #define GE_SRCAREAY_OFF 0x30 #define GE_SRCAREAW_OFF 0x34 #define GE_SRCAREAH_OFF 0x38 #define GE_DESTBASE_OFF 0x3c #define GE_DESTDISPW_OFF 0x40 #define GE_DESTDISPH_OFF 0x44 #define GE_DESTAREAX_OFF 0x48 #define GE_DESTAREAY_OFF 0x4c #define GE_DESTAREAW_OFF 0x50 #define GE_DESTAREAH_OFF 0x54 #define GE_PAT0C_OFF 0x88 /* Pattern 0 color */ #define GE_ENABLE_OFF 0xec #define GE_INTEN_OFF 0xf0 #define GE_STATUS_OFF 0xf8 static void __iomem *regbase; void wmt_ge_fillrect(struct fb_info *p, const struct fb_fillrect *rect) { unsigned long fg, pat; if (p->state != FBINFO_STATE_RUNNING) return; if (p->fix.visual == FB_VISUAL_TRUECOLOR || p->fix.visual == FB_VISUAL_DIRECTCOLOR) fg = ((u32 *) (p->pseudo_palette))[rect->color]; else fg = rect->color; pat = pixel_to_pat(p->var.bits_per_pixel, fg); if (p->fbops->fb_sync) p->fbops->fb_sync(p); writel(p->var.bits_per_pixel == 32 ? 3 : (p->var.bits_per_pixel == 8 ? 0 : 1), regbase + GE_DEPTH_OFF); writel(p->var.bits_per_pixel == 15 ? 1 : 0, regbase + GE_HIGHCOLOR_OFF); writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF); writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF); writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF); writel(rect->dx, regbase + GE_DESTAREAX_OFF); writel(rect->dy, regbase + GE_DESTAREAY_OFF); writel(rect->width - 1, regbase + GE_DESTAREAW_OFF); writel(rect->height - 1, regbase + GE_DESTAREAH_OFF); writel(pat, regbase + GE_PAT0C_OFF); writel(1, regbase + GE_COMMAND_OFF); writel(rect->rop == ROP_XOR ? 0x5a : 0xf0, regbase + GE_ROPCODE_OFF); writel(1, regbase + GE_FIRE_OFF); } EXPORT_SYMBOL_GPL(wmt_ge_fillrect); void wmt_ge_copyarea(struct fb_info *p, const struct fb_copyarea *area) { if (p->state != FBINFO_STATE_RUNNING) return; if (p->fbops->fb_sync) p->fbops->fb_sync(p); writel(p->var.bits_per_pixel > 16 ? 3 : (p->var.bits_per_pixel > 8 ? 1 : 0), regbase + GE_DEPTH_OFF); writel(p->fix.smem_start, regbase + GE_SRCBASE_OFF); writel(p->var.xres_virtual - 1, regbase + GE_SRCDISPW_OFF); writel(p->var.yres_virtual - 1, regbase + GE_SRCDISPH_OFF); writel(area->sx, regbase + GE_SRCAREAX_OFF); writel(area->sy, regbase + GE_SRCAREAY_OFF); writel(area->width - 1, regbase + GE_SRCAREAW_OFF); writel(area->height - 1, regbase + GE_SRCAREAH_OFF); writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF); writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF); writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF); writel(area->dx, regbase + GE_DESTAREAX_OFF); writel(area->dy, regbase + GE_DESTAREAY_OFF); writel(area->width - 1, regbase + GE_DESTAREAW_OFF); writel(area->height - 1, regbase + GE_DESTAREAH_OFF); writel(0xcc, regbase + GE_ROPCODE_OFF); writel(1, regbase + GE_COMMAND_OFF); writel(1, regbase + GE_FIRE_OFF); } EXPORT_SYMBOL_GPL(wmt_ge_copyarea); int wmt_ge_sync(struct fb_info *p) { int loops = 5000000; while ((readl(regbase + GE_STATUS_OFF) & 4) && --loops) cpu_relax(); return loops > 0 ? 0 : -EBUSY; } EXPORT_SYMBOL_GPL(wmt_ge_sync); static int __devinit wmt_ge_rops_probe(struct platform_device *pdev) { struct resource *res; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (res == NULL) { dev_err(&pdev->dev, "no I/O memory resource defined\n"); return -ENODEV; } /* Only one ROP engine is presently supported. */ if (unlikely(regbase)) { WARN_ON(1); return -EBUSY; } regbase = ioremap(res->start, resource_size(res)); if (regbase == NULL) { dev_err(&pdev->dev, "failed to map I/O memory\n"); return -EBUSY; } writel(1, regbase + GE_ENABLE_OFF); printk(KERN_INFO "Enabled support for WMT GE raster acceleration\n"); return 0; } static int __devexit wmt_ge_rops_remove(struct platform_device *pdev) { iounmap(regbase); return 0; } static struct platform_driver wmt_ge_rops_driver = { .probe = wmt_ge_rops_probe, .remove = __devexit_p(wmt_ge_rops_remove), .driver = { .owner = THIS_MODULE, .name = "wmt_ge_rops", }, }; module_platform_driver(wmt_ge_rops_driver); MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com"); MODULE_DESCRIPTION("Accelerators for raster operations using " "WonderMedia Graphics Engine"); MODULE_LICENSE("GPL");