1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/drivers/video/wmt_ge_rops.c 4 * 5 * Accelerators for raster operations using WonderMedia Graphics Engine 6 * 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 0x00 19 #define GE_DEPTH_OFF 0x04 20 #define GE_HIGHCOLOR_OFF 0x08 21 #define GE_ROPCODE_OFF 0x14 22 #define GE_FIRE_OFF 0x18 23 #define GE_SRCBASE_OFF 0x20 24 #define GE_SRCDISPW_OFF 0x24 25 #define GE_SRCDISPH_OFF 0x28 26 #define GE_SRCAREAX_OFF 0x2c 27 #define GE_SRCAREAY_OFF 0x30 28 #define GE_SRCAREAW_OFF 0x34 29 #define GE_SRCAREAH_OFF 0x38 30 #define GE_DESTBASE_OFF 0x3c 31 #define GE_DESTDISPW_OFF 0x40 32 #define GE_DESTDISPH_OFF 0x44 33 #define GE_DESTAREAX_OFF 0x48 34 #define GE_DESTAREAY_OFF 0x4c 35 #define GE_DESTAREAW_OFF 0x50 36 #define GE_DESTAREAH_OFF 0x54 37 #define GE_PAT0C_OFF 0x88 /* Pattern 0 color */ 38 #define GE_ENABLE_OFF 0xec 39 #define GE_INTEN_OFF 0xf0 40 #define GE_STATUS_OFF 0xf8 41 42 static void __iomem *regbase; 43 44 void 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 else 55 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 } 78 EXPORT_SYMBOL_GPL(wmt_ge_fillrect); 79 80 void 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 } 111 EXPORT_SYMBOL_GPL(wmt_ge_copyarea); 112 113 int 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 } 120 EXPORT_SYMBOL_GPL(wmt_ge_sync); 121 122 static 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 } 149 150 static void wmt_ge_rops_remove(struct platform_device *pdev) 151 { 152 iounmap(regbase); 153 } 154 155 static const struct of_device_id wmt_dt_ids[] = { 156 { .compatible = "wm,prizm-ge-rops", }, 157 { /* sentinel */ } 158 }; 159 160 static struct platform_driver wmt_ge_rops_driver = { 161 .probe = wmt_ge_rops_probe, 162 .remove_new = wmt_ge_rops_remove, 163 .driver = { 164 .name = "wmt_ge_rops", 165 .of_match_table = wmt_dt_ids, 166 }, 167 }; 168 169 module_platform_driver(wmt_ge_rops_driver); 170 171 MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com>"); 172 MODULE_DESCRIPTION("Accelerators for raster operations using " 173 "WonderMedia Graphics Engine"); 174 MODULE_DEVICE_TABLE(of, wmt_dt_ids); 175