1 files changed, 177 insertions, 0 deletions

diff --git a/drivers/video/fbdev/maxinefb.c b/drivers/video/fbdev/maxinefb.c
new file mode 100644
index 000000000000..5cf52d3c8e75
--- /dev/null
+++ b/drivers/video/fbdev/maxinefb.c
@@ -0,0 +1,177 @@
+/*
+ *      linux/drivers/video/maxinefb.c
+ *
+ *      DECstation 5000/xx onboard framebuffer support ... derived from:
+ *      "HP300 Topcat framebuffer support (derived from macfb of all things)
+ *      Phil Blundell <philb@gnu.org> 1998", the original code can be
+ *      found in the file hpfb.c in the same directory.
+ *
+ *      DECstation related code Copyright (C) 1999,2000,2001 by
+ *      Michael Engel <engel@unix-ag.org> and
+ *      Karsten Merker <merker@linuxtag.org>.
+ *      This file is subject to the terms and conditions of the GNU General
+ *      Public License.  See the file COPYING in the main directory of this
+ *      archive for more details.
+ *
+ */
+
+/*
+ * Changes:
+ * 2001/01/27 removed debugging and testing code, fixed fb_ops
+ *            initialization which had caused a crash before,
+ *            general cleanup, first official release (KM)
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/fb.h>
+#include <video/maxinefb.h>
+
+/* bootinfo.h defines the machine type values, needed when checking */
+/* whether are really running on a maxine, KM                       */
+#include <asm/bootinfo.h>
+
+static struct fb_info fb_info;
+
+static struct fb_var_screeninfo maxinefb_defined = {
+        .xres =         1024,
+        .yres =         768,
+        .xres_virtual = 1024,
+        .yres_virtual = 768,
+        .bits_per_pixel =8,
+        .activate =     FB_ACTIVATE_NOW,
+        .height =       -1,
+        .width =        -1,
+        .vmode =        FB_VMODE_NONINTERLACED,
+};
+
+static struct fb_fix_screeninfo maxinefb_fix = {
+        .id =           "Maxine",
+        .smem_len =     (1024*768),
+        .type =         FB_TYPE_PACKED_PIXELS,
+        .visual =       FB_VISUAL_PSEUDOCOLOR,
+        .line_length =  1024,
+};
+
+/* Handle the funny Inmos RamDAC/video controller ... */
+
+void maxinefb_ims332_write_register(int regno, register unsigned int val)
+{
+        register unsigned char *regs = (char *) MAXINEFB_IMS332_ADDRESS;
+        unsigned char *wptr;
+
+        wptr = regs + 0xa0000 + (regno << 4);
+        *((volatile unsigned int *) (regs)) = (val >> 8) & 0xff00;
+        *((volatile unsigned short *) (wptr)) = val;
+}
+
+unsigned int maxinefb_ims332_read_register(int regno)
+{
+        register unsigned char *regs = (char *) MAXINEFB_IMS332_ADDRESS;
+        unsigned char *rptr;
+        register unsigned int j, k;
+
+        rptr = regs + 0x80000 + (regno << 4);
+        j = *((volatile unsigned short *) rptr);
+        k = *((volatile unsigned short *) regs);
+
+        return (j & 0xffff) | ((k & 0xff00) << 8);
+}
+
+/* Set the palette */
+static int maxinefb_setcolreg(unsigned regno, unsigned red, unsigned green,
+                              unsigned blue, unsigned transp, struct fb_info *info)
+{
+        /* value to be written into the palette reg. */
+        unsigned long hw_colorvalue = 0;
+
+        if (regno > 255)
+                return 1;
+
+        red   >>= 8;    /* The cmap fields are 16 bits    */
+        green >>= 8;    /* wide, but the harware colormap */
+        blue  >>= 8;    /* registers are only 8 bits wide */
+
+        hw_colorvalue = (blue << 16) + (green << 8) + (red);
+
+        maxinefb_ims332_write_register(IMS332_REG_COLOR_PALETTE + regno,
+                                       hw_colorvalue);
+        return 0;
+}
+
+static struct fb_ops maxinefb_ops = {
+        .owner          = THIS_MODULE,
+        .fb_setcolreg   = maxinefb_setcolreg,
+        .fb_fillrect    = cfb_fillrect,
+        .fb_copyarea    = cfb_copyarea,
+        .fb_imageblit   = cfb_imageblit,
+};
+
+int __init maxinefb_init(void)
+{
+        unsigned long fboff;
+        unsigned long fb_start;
+        int i;
+
+        if (fb_get_options("maxinefb", NULL))
+                return -ENODEV;
+
+        /* Validate we're on the proper machine type */
+        if (mips_machtype != MACH_DS5000_XX) {
+                return -EINVAL;
+        }
+
+        printk(KERN_INFO "Maxinefb: Personal DECstation detected\n");
+        printk(KERN_INFO "Maxinefb: initializing onboard framebuffer\n");
+
+        /* Framebuffer display memory base address */
+        fb_start = DS5000_xx_ONBOARD_FBMEM_START;
+
+        /* Clear screen */
+        for (fboff = fb_start; fboff < fb_start + 0x1ffff; fboff++)
+                *(volatile unsigned char *)fboff = 0x0;
+
+        maxinefb_fix.smem_start = fb_start;
+        
+        /* erase hardware cursor */
+        for (i = 0; i < 512; i++) {
+                maxinefb_ims332_write_register(IMS332_REG_CURSOR_RAM + i,
+                                               0);
+                /*
+                   if (i&0x8 == 0)
+                   maxinefb_ims332_write_register (IMS332_REG_CURSOR_RAM + i, 0x0f);
+                   else
+                   maxinefb_ims332_write_register (IMS332_REG_CURSOR_RAM + i, 0xf0);
+                 */
+        }
+
+        fb_info.fbops = &maxinefb_ops;
+        fb_info.screen_base = (char *)maxinefb_fix.smem_start;
+        fb_info.var = maxinefb_defined;
+        fb_info.fix = maxinefb_fix;
+        fb_info.flags = FBINFO_DEFAULT;
+
+        fb_alloc_cmap(&fb_info.cmap, 256, 0);
+
+        if (register_framebuffer(&fb_info) < 0)
+                return 1;
+        return 0;
+}
+
+static void __exit maxinefb_exit(void)
+{
+        unregister_framebuffer(&fb_info);
+}
+
+#ifdef MODULE
+MODULE_LICENSE("GPL");
+#endif
+module_init(maxinefb_init);
+module_exit(maxinefb_exit);
+