--- /dev/null
+/*
+ * 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",
+ },
+};
+
+static int __init wmt_ge_rops_init(void)
+{
+ return platform_driver_register(&wmt_ge_rops_driver);
+}
+
+static void __exit wmt_ge_rops_exit(void)
+{
+ platform_driver_unregister(&wmt_ge_rops_driver);
+}
+
+module_init(wmt_ge_rops_init);
+module_exit(wmt_ge_rops_exit);
+
+MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com");
+MODULE_DESCRIPTION("Accelerators for raster operations using "
+ "WonderMedia Graphics Engine");
+MODULE_LICENSE("GPL");
projects / mv-sheeva.git / blobdiff