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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/video/maxinefb.c
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/video/maxinefb.c')
-rw-r--r--drivers/video/maxinefb.c180
1 files changed, 180 insertions, 0 deletions
diff --git a/drivers/video/maxinefb.c b/drivers/video/maxinefb.c
new file mode 100644
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+++ b/drivers/video/maxinefb.c
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+/*
+ * 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/sched.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/slab.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 onboard graphics 1024x768x8",
+ .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;
+
+ 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_get_fix = gen_get_fix,
+ .fb_get_var = gen_get_var,
+ .fb_setcolreg = maxinefb_setcolreg,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+ .fb_cursor = soft_cursor,
+};
+
+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);
+