1 /* 2 * linux/drivers/video/wmt_ge_rops.c 3 * 4 * Accelerators for raster operations using WonderMedia Graphics Engine 5 * 6 * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com> 7 * 8 * This software is licensed under the terms of the GNU General Public 9 * License version 2, as published by the Free Software Foundation, and 10 * may be copied, distributed, and modified under those terms. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 */ 17 18 #include <linux/module.h> 19 #include <linux/fb.h> 20 #include <linux/platform_device.h> 21 #include "core/fb_draw.h" 22 23 #define GE_COMMAND_OFF 0x00 24 #define GE_DEPTH_OFF 0x04 25 #define GE_HIGHCOLOR_OFF 0x08 26 #define GE_ROPCODE_OFF 0x14 27 #define GE_FIRE_OFF 0x18 28 #define GE_SRCBASE_OFF 0x20 29 #define GE_SRCDISPW_OFF 0x24 30 #define GE_SRCDISPH_OFF 0x28 31 #define GE_SRCAREAX_OFF 0x2c 32 #define GE_SRCAREAY_OFF 0x30 33 #define GE_SRCAREAW_OFF 0x34 34 #define GE_SRCAREAH_OFF 0x38 35 #define GE_DESTBASE_OFF 0x3c 36 #define GE_DESTDISPW_OFF 0x40 37 #define GE_DESTDISPH_OFF 0x44 38 #define GE_DESTAREAX_OFF 0x48 39 #define GE_DESTAREAY_OFF 0x4c 40 #define GE_DESTAREAW_OFF 0x50 41 #define GE_DESTAREAH_OFF 0x54 42 #define GE_PAT0C_OFF 0x88 /* Pattern 0 color */ 43 #define GE_ENABLE_OFF 0xec 44 #define GE_INTEN_OFF 0xf0 45 #define GE_STATUS_OFF 0xf8 46 47 static void __iomem *regbase; 48 49 void wmt_ge_fillrect(struct fb_info *p, const struct fb_fillrect *rect) 50 { 51 unsigned long fg, pat; 52 53 if (p->state != FBINFO_STATE_RUNNING) 54 return; 55 56 if (p->fix.visual == FB_VISUAL_TRUECOLOR || 57 p->fix.visual == FB_VISUAL_DIRECTCOLOR) 58 fg = ((u32 *) (p->pseudo_palette))[rect->color]; 59 else 60 fg = rect->color; 61 62 pat = pixel_to_pat(p->var.bits_per_pixel, fg); 63 64 if (p->fbops->fb_sync) 65 p->fbops->fb_sync(p); 66 67 writel(p->var.bits_per_pixel == 32 ? 3 : 68 (p->var.bits_per_pixel == 8 ? 0 : 1), regbase + GE_DEPTH_OFF); 69 writel(p->var.bits_per_pixel == 15 ? 1 : 0, regbase + GE_HIGHCOLOR_OFF); 70 writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF); 71 writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF); 72 writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF); 73 writel(rect->dx, regbase + GE_DESTAREAX_OFF); 74 writel(rect->dy, regbase + GE_DESTAREAY_OFF); 75 writel(rect->width - 1, regbase + GE_DESTAREAW_OFF); 76 writel(rect->height - 1, regbase + GE_DESTAREAH_OFF); 77 78 writel(pat, regbase + GE_PAT0C_OFF); 79 writel(1, regbase + GE_COMMAND_OFF); 80 writel(rect->rop == ROP_XOR ? 0x5a : 0xf0, regbase + GE_ROPCODE_OFF); 81 writel(1, regbase + GE_FIRE_OFF); 82 } 83 EXPORT_SYMBOL_GPL(wmt_ge_fillrect); 84 85 void wmt_ge_copyarea(struct fb_info *p, const struct fb_copyarea *area) 86 { 87 if (p->state != FBINFO_STATE_RUNNING) 88 return; 89 90 if (p->fbops->fb_sync) 91 p->fbops->fb_sync(p); 92 93 writel(p->var.bits_per_pixel > 16 ? 3 : 94 (p->var.bits_per_pixel > 8 ? 1 : 0), regbase + GE_DEPTH_OFF); 95 96 writel(p->fix.smem_start, regbase + GE_SRCBASE_OFF); 97 writel(p->var.xres_virtual - 1, regbase + GE_SRCDISPW_OFF); 98 writel(p->var.yres_virtual - 1, regbase + GE_SRCDISPH_OFF); 99 writel(area->sx, regbase + GE_SRCAREAX_OFF); 100 writel(area->sy, regbase + GE_SRCAREAY_OFF); 101 writel(area->width - 1, regbase + GE_SRCAREAW_OFF); 102 writel(area->height - 1, regbase + GE_SRCAREAH_OFF); 103 104 writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF); 105 writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF); 106 writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF); 107 writel(area->dx, regbase + GE_DESTAREAX_OFF); 108 writel(area->dy, regbase + GE_DESTAREAY_OFF); 109 writel(area->width - 1, regbase + GE_DESTAREAW_OFF); 110 writel(area->height - 1, regbase + GE_DESTAREAH_OFF); 111 112 writel(0xcc, regbase + GE_ROPCODE_OFF); 113 writel(1, regbase + GE_COMMAND_OFF); 114 writel(1, regbase + GE_FIRE_OFF); 115 } 116 EXPORT_SYMBOL_GPL(wmt_ge_copyarea); 117 118 int wmt_ge_sync(struct fb_info *p) 119 { 120 int loops = 5000000; 121 while ((readl(regbase + GE_STATUS_OFF) & 4) && --loops) 122 cpu_relax(); 123 return loops > 0 ? 0 : -EBUSY; 124 } 125 EXPORT_SYMBOL_GPL(wmt_ge_sync); 126 127 static int wmt_ge_rops_probe(struct platform_device *pdev) 128 { 129 struct resource *res; 130 131 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 132 if (res == NULL) { 133 dev_err(&pdev->dev, "no I/O memory resource defined\n"); 134 return -ENODEV; 135 } 136 137 /* Only one ROP engine is presently supported. */ 138 if (unlikely(regbase)) { 139 WARN_ON(1); 140 return -EBUSY; 141 } 142 143 regbase = ioremap(res->start, resource_size(res)); 144 if (regbase == NULL) { 145 dev_err(&pdev->dev, "failed to map I/O memory\n"); 146 return -EBUSY; 147 } 148 149 writel(1, regbase + GE_ENABLE_OFF); 150 printk(KERN_INFO "Enabled support for WMT GE raster acceleration\n"); 151 152 return 0; 153 } 154 155 static int wmt_ge_rops_remove(struct platform_device *pdev) 156 { 157 iounmap(regbase); 158 return 0; 159 } 160 161 static const struct of_device_id wmt_dt_ids[] = { 162 { .compatible = "wm,prizm-ge-rops", }, 163 { /* sentinel */ } 164 }; 165 166 static struct platform_driver wmt_ge_rops_driver = { 167 .probe = wmt_ge_rops_probe, 168 .remove = wmt_ge_rops_remove, 169 .driver = { 170 .name = "wmt_ge_rops", 171 .of_match_table = wmt_dt_ids, 172 }, 173 }; 174 175 module_platform_driver(wmt_ge_rops_driver); 176 177 MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com>"); 178 MODULE_DESCRIPTION("Accelerators for raster operations using " 179 "WonderMedia Graphics Engine"); 180 MODULE_LICENSE("GPL v2"); 181 MODULE_DEVICE_TABLE(of, wmt_dt_ids); 182