// SPDX-License-Identifier: GPL-2.0-only
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/*
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* linux/drivers/video/wmt_ge_rops.c
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*
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* Accelerators for raster operations using WonderMedia Graphics Engine
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*
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* Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
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*/
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#include <linux/module.h>
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#include <linux/fb.h>
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#include <linux/platform_device.h>
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#include "core/fb_draw.h"
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#define GE_COMMAND_OFF 0x00
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#define GE_DEPTH_OFF 0x04
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#define GE_HIGHCOLOR_OFF 0x08
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#define GE_ROPCODE_OFF 0x14
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#define GE_FIRE_OFF 0x18
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#define GE_SRCBASE_OFF 0x20
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#define GE_SRCDISPW_OFF 0x24
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#define GE_SRCDISPH_OFF 0x28
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#define GE_SRCAREAX_OFF 0x2c
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#define GE_SRCAREAY_OFF 0x30
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#define GE_SRCAREAW_OFF 0x34
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#define GE_SRCAREAH_OFF 0x38
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#define GE_DESTBASE_OFF 0x3c
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#define GE_DESTDISPW_OFF 0x40
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#define GE_DESTDISPH_OFF 0x44
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#define GE_DESTAREAX_OFF 0x48
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#define GE_DESTAREAY_OFF 0x4c
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#define GE_DESTAREAW_OFF 0x50
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#define GE_DESTAREAH_OFF 0x54
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#define GE_PAT0C_OFF 0x88 /* Pattern 0 color */
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#define GE_ENABLE_OFF 0xec
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#define GE_INTEN_OFF 0xf0
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#define GE_STATUS_OFF 0xf8
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static void __iomem *regbase;
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void wmt_ge_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
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{
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unsigned long fg, pat;
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if (p->state != FBINFO_STATE_RUNNING)
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return;
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if (p->fix.visual == FB_VISUAL_TRUECOLOR ||
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p->fix.visual == FB_VISUAL_DIRECTCOLOR)
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fg = ((u32 *) (p->pseudo_palette))[rect->color];
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else
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fg = rect->color;
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pat = pixel_to_pat(p->var.bits_per_pixel, fg);
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if (p->fbops->fb_sync)
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p->fbops->fb_sync(p);
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writel(p->var.bits_per_pixel == 32 ? 3 :
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(p->var.bits_per_pixel == 8 ? 0 : 1), regbase + GE_DEPTH_OFF);
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writel(p->var.bits_per_pixel == 15 ? 1 : 0, regbase + GE_HIGHCOLOR_OFF);
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writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF);
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writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF);
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writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF);
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writel(rect->dx, regbase + GE_DESTAREAX_OFF);
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writel(rect->dy, regbase + GE_DESTAREAY_OFF);
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writel(rect->width - 1, regbase + GE_DESTAREAW_OFF);
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writel(rect->height - 1, regbase + GE_DESTAREAH_OFF);
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writel(pat, regbase + GE_PAT0C_OFF);
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writel(1, regbase + GE_COMMAND_OFF);
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writel(rect->rop == ROP_XOR ? 0x5a : 0xf0, regbase + GE_ROPCODE_OFF);
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writel(1, regbase + GE_FIRE_OFF);
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}
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EXPORT_SYMBOL_GPL(wmt_ge_fillrect);
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void wmt_ge_copyarea(struct fb_info *p, const struct fb_copyarea *area)
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{
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if (p->state != FBINFO_STATE_RUNNING)
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return;
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if (p->fbops->fb_sync)
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p->fbops->fb_sync(p);
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writel(p->var.bits_per_pixel > 16 ? 3 :
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(p->var.bits_per_pixel > 8 ? 1 : 0), regbase + GE_DEPTH_OFF);
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writel(p->fix.smem_start, regbase + GE_SRCBASE_OFF);
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writel(p->var.xres_virtual - 1, regbase + GE_SRCDISPW_OFF);
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writel(p->var.yres_virtual - 1, regbase + GE_SRCDISPH_OFF);
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writel(area->sx, regbase + GE_SRCAREAX_OFF);
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writel(area->sy, regbase + GE_SRCAREAY_OFF);
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writel(area->width - 1, regbase + GE_SRCAREAW_OFF);
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writel(area->height - 1, regbase + GE_SRCAREAH_OFF);
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writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF);
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writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF);
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writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF);
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writel(area->dx, regbase + GE_DESTAREAX_OFF);
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writel(area->dy, regbase + GE_DESTAREAY_OFF);
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writel(area->width - 1, regbase + GE_DESTAREAW_OFF);
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writel(area->height - 1, regbase + GE_DESTAREAH_OFF);
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writel(0xcc, regbase + GE_ROPCODE_OFF);
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writel(1, regbase + GE_COMMAND_OFF);
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writel(1, regbase + GE_FIRE_OFF);
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}
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EXPORT_SYMBOL_GPL(wmt_ge_copyarea);
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int wmt_ge_sync(struct fb_info *p)
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{
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int loops = 5000000;
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while ((readl(regbase + GE_STATUS_OFF) & 4) && --loops)
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cpu_relax();
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return loops > 0 ? 0 : -EBUSY;
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}
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EXPORT_SYMBOL_GPL(wmt_ge_sync);
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static int wmt_ge_rops_probe(struct platform_device *pdev)
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{
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struct resource *res;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (res == NULL) {
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dev_err(&pdev->dev, "no I/O memory resource defined\n");
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return -ENODEV;
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}
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/* Only one ROP engine is presently supported. */
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if (unlikely(regbase)) {
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WARN_ON(1);
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return -EBUSY;
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}
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regbase = ioremap(res->start, resource_size(res));
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if (regbase == NULL) {
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dev_err(&pdev->dev, "failed to map I/O memory\n");
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return -EBUSY;
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}
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writel(1, regbase + GE_ENABLE_OFF);
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printk(KERN_INFO "Enabled support for WMT GE raster acceleration\n");
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return 0;
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}
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static int wmt_ge_rops_remove(struct platform_device *pdev)
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{
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iounmap(regbase);
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return 0;
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}
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static const struct of_device_id wmt_dt_ids[] = {
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{ .compatible = "wm,prizm-ge-rops", },
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{ /* sentinel */ }
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};
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static struct platform_driver wmt_ge_rops_driver = {
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.probe = wmt_ge_rops_probe,
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.remove = wmt_ge_rops_remove,
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.driver = {
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.name = "wmt_ge_rops",
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.of_match_table = wmt_dt_ids,
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},
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};
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module_platform_driver(wmt_ge_rops_driver);
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MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com>");
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MODULE_DESCRIPTION("Accelerators for raster operations using "
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"WonderMedia Graphics Engine");
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MODULE_LICENSE("GPL v2");
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MODULE_DEVICE_TABLE(of, wmt_dt_ids);
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