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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * linux/drivers/video/wmt_ge_rops.c4 *5 * Accelerators for raster operations using WonderMedia Graphics Engine6 *7 * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>8 */9 10#include <linux/module.h>11#include <linux/fb.h>12#include <linux/io.h>13#include <linux/platform_device.h>14 15#include "core/fb_draw.h"16#include "wmt_ge_rops.h"17 18#define GE_COMMAND_OFF 0x0019#define GE_DEPTH_OFF 0x0420#define GE_HIGHCOLOR_OFF 0x0821#define GE_ROPCODE_OFF 0x1422#define GE_FIRE_OFF 0x1823#define GE_SRCBASE_OFF 0x2024#define GE_SRCDISPW_OFF 0x2425#define GE_SRCDISPH_OFF 0x2826#define GE_SRCAREAX_OFF 0x2c27#define GE_SRCAREAY_OFF 0x3028#define GE_SRCAREAW_OFF 0x3429#define GE_SRCAREAH_OFF 0x3830#define GE_DESTBASE_OFF 0x3c31#define GE_DESTDISPW_OFF 0x4032#define GE_DESTDISPH_OFF 0x4433#define GE_DESTAREAX_OFF 0x4834#define GE_DESTAREAY_OFF 0x4c35#define GE_DESTAREAW_OFF 0x5036#define GE_DESTAREAH_OFF 0x5437#define GE_PAT0C_OFF 0x88 /* Pattern 0 color */38#define GE_ENABLE_OFF 0xec39#define GE_INTEN_OFF 0xf040#define GE_STATUS_OFF 0xf841 42static void __iomem *regbase;43 44void wmt_ge_fillrect(struct fb_info *p, const struct fb_fillrect *rect)45{46 unsigned long fg, pat;47 48 if (p->state != FBINFO_STATE_RUNNING)49 return;50 51 if (p->fix.visual == FB_VISUAL_TRUECOLOR ||52 p->fix.visual == FB_VISUAL_DIRECTCOLOR)53 fg = ((u32 *) (p->pseudo_palette))[rect->color];54 else55 fg = rect->color;56 57 pat = pixel_to_pat(p->var.bits_per_pixel, fg);58 59 if (p->fbops->fb_sync)60 p->fbops->fb_sync(p);61 62 writel(p->var.bits_per_pixel == 32 ? 3 :63 (p->var.bits_per_pixel == 8 ? 0 : 1), regbase + GE_DEPTH_OFF);64 writel(p->var.bits_per_pixel == 15 ? 1 : 0, regbase + GE_HIGHCOLOR_OFF);65 writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF);66 writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF);67 writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF);68 writel(rect->dx, regbase + GE_DESTAREAX_OFF);69 writel(rect->dy, regbase + GE_DESTAREAY_OFF);70 writel(rect->width - 1, regbase + GE_DESTAREAW_OFF);71 writel(rect->height - 1, regbase + GE_DESTAREAH_OFF);72 73 writel(pat, regbase + GE_PAT0C_OFF);74 writel(1, regbase + GE_COMMAND_OFF);75 writel(rect->rop == ROP_XOR ? 0x5a : 0xf0, regbase + GE_ROPCODE_OFF);76 writel(1, regbase + GE_FIRE_OFF);77}78EXPORT_SYMBOL_GPL(wmt_ge_fillrect);79 80void wmt_ge_copyarea(struct fb_info *p, const struct fb_copyarea *area)81{82 if (p->state != FBINFO_STATE_RUNNING)83 return;84 85 if (p->fbops->fb_sync)86 p->fbops->fb_sync(p);87 88 writel(p->var.bits_per_pixel > 16 ? 3 :89 (p->var.bits_per_pixel > 8 ? 1 : 0), regbase + GE_DEPTH_OFF);90 91 writel(p->fix.smem_start, regbase + GE_SRCBASE_OFF);92 writel(p->var.xres_virtual - 1, regbase + GE_SRCDISPW_OFF);93 writel(p->var.yres_virtual - 1, regbase + GE_SRCDISPH_OFF);94 writel(area->sx, regbase + GE_SRCAREAX_OFF);95 writel(area->sy, regbase + GE_SRCAREAY_OFF);96 writel(area->width - 1, regbase + GE_SRCAREAW_OFF);97 writel(area->height - 1, regbase + GE_SRCAREAH_OFF);98 99 writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF);100 writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF);101 writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF);102 writel(area->dx, regbase + GE_DESTAREAX_OFF);103 writel(area->dy, regbase + GE_DESTAREAY_OFF);104 writel(area->width - 1, regbase + GE_DESTAREAW_OFF);105 writel(area->height - 1, regbase + GE_DESTAREAH_OFF);106 107 writel(0xcc, regbase + GE_ROPCODE_OFF);108 writel(1, regbase + GE_COMMAND_OFF);109 writel(1, regbase + GE_FIRE_OFF);110}111EXPORT_SYMBOL_GPL(wmt_ge_copyarea);112 113int wmt_ge_sync(struct fb_info *p)114{115 int loops = 5000000;116 while ((readl(regbase + GE_STATUS_OFF) & 4) && --loops)117 cpu_relax();118 return loops > 0 ? 0 : -EBUSY;119}120EXPORT_SYMBOL_GPL(wmt_ge_sync);121 122static int wmt_ge_rops_probe(struct platform_device *pdev)123{124 struct resource *res;125 126 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);127 if (res == NULL) {128 dev_err(&pdev->dev, "no I/O memory resource defined\n");129 return -ENODEV;130 }131 132 /* Only one ROP engine is presently supported. */133 if (unlikely(regbase)) {134 WARN_ON(1);135 return -EBUSY;136 }137 138 regbase = ioremap(res->start, resource_size(res));139 if (regbase == NULL) {140 dev_err(&pdev->dev, "failed to map I/O memory\n");141 return -EBUSY;142 }143 144 writel(1, regbase + GE_ENABLE_OFF);145 printk(KERN_INFO "Enabled support for WMT GE raster acceleration\n");146 147 return 0;148}149 150static void wmt_ge_rops_remove(struct platform_device *pdev)151{152 iounmap(regbase);153}154 155static const struct of_device_id wmt_dt_ids[] = {156 { .compatible = "wm,prizm-ge-rops", },157 { /* sentinel */ }158};159 160static struct platform_driver wmt_ge_rops_driver = {161 .probe = wmt_ge_rops_probe,162 .remove = wmt_ge_rops_remove,163 .driver = {164 .name = "wmt_ge_rops",165 .of_match_table = wmt_dt_ids,166 },167};168 169module_platform_driver(wmt_ge_rops_driver);170 171MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com>");172MODULE_DESCRIPTION("Accelerators for raster operations using "173 "WonderMedia Graphics Engine");174MODULE_DEVICE_TABLE(of, wmt_dt_ids);175