/* sunxvr1000.c: Sun XVR-1000 driver for sparc64 systems * * Copyright (C) 2010 David S. Miller (davem@davemloft.net) */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/fb.h> #include <linux/init.h> #include <linux/of_device.h> struct gfb_info { struct fb_info *info; char __iomem *fb_base; unsigned long fb_base_phys; struct device_node *of_node; unsigned int width; unsigned int height; unsigned int depth; unsigned int fb_size; u32 pseudo_palette[16]; }; static int __devinit gfb_get_props(struct gfb_info *gp) { gp->width = of_getintprop_default(gp->of_node, "width", 0); gp->height = of_getintprop_default(gp->of_node, "height", 0); gp->depth = of_getintprop_default(gp->of_node, "depth", 32); if (!gp->width || !gp->height) { printk(KERN_ERR "gfb: Critical properties missing for %s\n", gp->of_node->full_name); return -EINVAL; } return 0; } static int gfb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info) { u32 value; if (regno < 16) { red >>= 8; green >>= 8; blue >>= 8; value = (blue << 16) | (green << 8) | red; ((u32 *)info->pseudo_palette)[regno] = value; } return 0; } static struct fb_ops gfb_ops = { .owner = THIS_MODULE, .fb_setcolreg = gfb_setcolreg, .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, }; static int __devinit gfb_set_fbinfo(struct gfb_info *gp) { struct fb_info *info = gp->info; struct fb_var_screeninfo *var = &info->var; info->flags = FBINFO_DEFAULT; info->fbops = &gfb_ops; info->screen_base = gp->fb_base; info->screen_size = gp->fb_size; info->pseudo_palette = gp->pseudo_palette; /* Fill fix common fields */ strlcpy(info->fix.id, "gfb", sizeof(info->fix.id)); info->fix.smem_start = gp->fb_base_phys; info->fix.smem_len = gp->fb_size; info->fix.type = FB_TYPE_PACKED_PIXELS; if (gp->depth == 32 || gp->depth == 24) info->fix.visual = FB_VISUAL_TRUECOLOR; else info->fix.visual = FB_VISUAL_PSEUDOCOLOR; var->xres = gp->width; var->yres = gp->height; var->xres_virtual = var->xres; var->yres_virtual = var->yres; var->bits_per_pixel = gp->depth; var->red.offset = 0; var->red.length = 8; var->green.offset = 8; var->green.length = 8; var->blue.offset = 16; var->blue.length = 8; var->transp.offset = 0; var->transp.length = 0; if (fb_alloc_cmap(&info->cmap, 256, 0)) { printk(KERN_ERR "gfb: Cannot allocate color map.\n"); return -ENOMEM; } return 0; } static int __devinit gfb_probe(struct platform_device *op, const struct of_device_id *match) { struct device_node *dp = op->dev.of_node; struct fb_info *info; struct gfb_info *gp; int err; info = framebuffer_alloc(sizeof(struct gfb_info), &op->dev); if (!info) { printk(KERN_ERR "gfb: Cannot allocate fb_info\n"); err = -ENOMEM; goto err_out; } gp = info->par; gp->info = info; gp->of_node = dp; gp->fb_base_phys = op->resource[6].start; err = gfb_get_props(gp); if (err) goto err_release_fb; /* Framebuffer length is the same regardless of resolution. */ info->fix.line_length = 16384; gp->fb_size = info->fix.line_length * gp->height; gp->fb_base = of_ioremap(&op->resource[6], 0, gp->fb_size, "gfb fb"); if (!gp->fb_base) goto err_release_fb; err = gfb_set_fbinfo(gp); if (err) goto err_unmap_fb; printk("gfb: Found device at %s\n", dp->full_name); err = register_framebuffer(info); if (err < 0) { printk(KERN_ERR "gfb: Could not register framebuffer %s\n", dp->full_name); goto err_unmap_fb; } dev_set_drvdata(&op->dev, info); return 0; err_unmap_fb: of_iounmap(&op->resource[6], gp->fb_base, gp->fb_size); err_release_fb: framebuffer_release(info); err_out: return err; } static int __devexit gfb_remove(struct platform_device *op) { struct fb_info *info = dev_get_drvdata(&op->dev); struct gfb_info *gp = info->par; unregister_framebuffer(info); iounmap(gp->fb_base); of_iounmap(&op->resource[6], gp->fb_base, gp->fb_size); framebuffer_release(info); dev_set_drvdata(&op->dev, NULL); return 0; } static const struct of_device_id gfb_match[] = { { .name = "SUNW,gfb", }, {}, }; MODULE_DEVICE_TABLE(of, ffb_match); static struct of_platform_driver gfb_driver = { .probe = gfb_probe, .remove = __devexit_p(gfb_remove), .driver = { .name = "gfb", .owner = THIS_MODULE, .of_match_table = gfb_match, }, }; static int __init gfb_init(void) { if (fb_get_options("gfb", NULL)) return -ENODEV; return of_register_platform_driver(&gfb_driver); } static void __exit gfb_exit(void) { of_unregister_platform_driver(&gfb_driver); } module_init(gfb_init); module_exit(gfb_exit); MODULE_DESCRIPTION("framebuffer driver for Sun XVR-1000 graphics"); MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); MODULE_VERSION("1.0"); MODULE_LICENSE("GPL");