summaryrefslogtreecommitdiffstats
path: root/drivers/video/sunxvr1000.c
diff options
context:
space:
mode:
authorDavid S. Miller <davem@davemloft.net>2010-03-13 16:25:03 -0800
committerDavid S. Miller <davem@davemloft.net>2010-03-13 16:25:03 -0800
commit2d378b9179881b46a0faf11430efb421fe03ddd8 (patch)
tree1f65ae4340bef3fdf11de7ced150d939f602461c /drivers/video/sunxvr1000.c
parent77d3926306bf4eecac50150ba5625797219f14ba (diff)
downloadlinux-2d378b9179881b46a0faf11430efb421fe03ddd8.tar.bz2
sparc64: Add very basic XVR-1000 framebuffer driver.
Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Frans van Berckel <fberckel@xs4all.nl>
Diffstat (limited to 'drivers/video/sunxvr1000.c')
-rw-r--r--drivers/video/sunxvr1000.c228
1 files changed, 228 insertions, 0 deletions
diff --git a/drivers/video/sunxvr1000.c b/drivers/video/sunxvr1000.c
new file mode 100644
index 000000000000..a8248c0b9192
--- /dev/null
+++ b/drivers/video/sunxvr1000.c
@@ -0,0 +1,228 @@
+/* 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/slab.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 of_device *op,
+ const struct of_device_id *match)
+{
+ struct device_node *dp = op->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 of_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 = {
+ .name = "gfb",
+ .match_table = gfb_match,
+ .probe = gfb_probe,
+ .remove = __devexit_p(gfb_remove),
+};
+
+static int __init gfb_init(void)
+{
+ if (fb_get_options("gfb", NULL))
+ return -ENODEV;
+
+ return of_register_driver(&gfb_driver, &of_bus_type);
+}
+
+static void __exit gfb_exit(void)
+{
+ of_unregister_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");