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