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>

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");