From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-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!
---
 drivers/video/pmag-ba-fb.c | 182 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 182 insertions(+)
 create mode 100644 drivers/video/pmag-ba-fb.c

(limited to 'drivers/video/pmag-ba-fb.c')

diff --git a/drivers/video/pmag-ba-fb.c b/drivers/video/pmag-ba-fb.c
new file mode 100644
index 00000000000..f8095588e99
--- /dev/null
+++ b/drivers/video/pmag-ba-fb.c
@@ -0,0 +1,182 @@
+/*
+ *      linux/drivers/video/pmag-ba-fb.c
+ *
+ *	PMAG-BA TurboChannel framebuffer card 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.
+ *
+ *	Based on digital document:
+ * 	"PMAG-BA TURBOchannel Color Frame Buffer
+ *	 Functional Specification", Revision 1.2, August 27, 1990
+ *
+ *      DECstation related code Copyright (C) 1999, 2000, 2001 by
+ *      Michael Engel <engel@unix-ag.org>, 
+ *      Karsten Merker <merker@linuxtag.org> and
+ *	Harald Koerfgen.
+ *      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.
+ *
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/timer.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 <asm/bootinfo.h>
+#include <asm/dec/machtype.h>
+#include <asm/dec/tc.h>
+#include <video/pmag-ba-fb.h>
+
+struct pmag_ba_ramdac_regs {
+	unsigned char addr_low;
+	unsigned char pad0[3];
+	unsigned char addr_hi;
+	unsigned char pad1[3];
+	unsigned char data;
+	unsigned char pad2[3];
+	unsigned char cmap;
+};
+
+/*
+ * Max 3 TURBOchannel slots -> max 3 PMAG-BA :)
+ */
+static struct fb_info pmagba_fb_info[3];
+
+static struct fb_var_screeninfo pmagbafb_defined = {
+	.xres		= 1024,
+	.yres		= 864,
+	.xres_virtual	= 1024,
+	.yres_virtual	= 864,
+	.bits_per_pixel	= 8,
+	.red.length	= 8,
+	.green.length	= 8,
+	.blue.length	= 8,
+	.activate	= FB_ACTIVATE_NOW,
+	.height		= 274,
+	.width		= 195,
+	.accel		= FB_ACCEL_NONE,
+	.vmode		= FB_VMODE_NONINTERLACED,
+};
+
+static struct fb_fix_screeninfo pmagbafb_fix = {
+	.id		= "PMAG-BA",
+	.smem_len	= (1024 * 864),
+	.type		= FB_TYPE_PACKED_PIXELS,
+	.visual		= FB_VISUAL_PSEUDOCOLOR,
+	.line_length	= 1024,
+};
+
+/*
+ * Turn hardware cursor off
+ */
+void pmagbafb_erase_cursor(struct pmag_ba_ramdac_regs *bt459_regs)
+{
+	bt459_regs->addr_low = 0;
+	bt459_regs->addr_hi = 3;
+	bt459_regs->data = 0;
+}
+
+/*
+ * Set the palette. 
+ */
+static int pmagbafb_setcolreg(unsigned regno, unsigned red, unsigned green,
+			      unsigned blue, unsigned transp,
+			      struct fb_info *info)
+{
+	struct pmag_ba_ramdac_regs *bt459_regs = (struct pmag_ba_ramdac_regs *) info->par;
+
+	if (regno >= info->cmap.len)
+		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 */
+
+	bt459_regs->addr_low = (__u8) regno;
+	bt459_regs->addr_hi = 0;
+	bt459_regs->cmap = red;
+	bt459_regs->cmap = green;
+	bt459_regs->cmap = blue;
+	return 0;
+}
+
+static struct fb_ops pmagbafb_ops = {
+	.owner		= THIS_MODULE,
+	.fb_get_fix	= gen_get_fix,
+	.fb_get_var	= gen_get_var,
+	.fb_setcolreg	= pmagbafb_setcolreg,
+	.fb_fillrect	= cfb_fillrect,
+	.fb_copyarea	= cfb_copyarea,
+	.fb_imageblit	= cfb_imageblit,
+	.fb_cursor	= soft_cursor,
+};
+
+int __init pmagbafb_init_one(int slot)
+{
+	unsigned long base_addr = get_tc_base_addr(slot);
+	struct fb_info *info = &pmagba_fb_info[slot]; 
+	struct display *disp = &pmagba_disp[slot];
+
+	printk("PMAG-BA framebuffer in slot %d\n", slot);
+	/*
+	 * Framebuffer display memory base address and friends
+	 */
+	pmagbafb_fix.smem_start = base_addr + PMAG_BA_ONBOARD_FBMEM_OFFSET;
+	info->par = (base_addr + PMAG_BA_BT459_OFFSET);
+
+	/*
+	 * Configure the Bt459 RAM DAC
+	 */
+	pmagbafb_erase_cursor((struct pmag_ba_ramdac_regs *) info->par);
+
+	/*
+	 *      Let there be consoles..
+	 */
+	info->fbops = &pmagbafb_ops;
+	info->var = pmagbafb_defined;
+	info->fix = pmagbafb_fix; 
+	info->screen_base = pmagbafb_fix.smem_start;
+	info->flags = FBINFO_DEFAULT;
+
+	fb_alloc_cmap(&fb_info.cmap, 256, 0);
+
+	if (register_framebuffer(info) < 0)
+		return 1;
+	return 0;
+}
+
+/* 
+ * Initialise the framebuffer
+ */
+
+int __init pmagbafb_init(void)
+{
+	int sid;
+	int found = 0;
+
+	if (fb_get_options("pmagbafb", NULL))
+		return -ENODEV;
+
+	if (TURBOCHANNEL) {
+		while ((sid = search_tc_card("PMAG-BA")) >= 0) {
+			found = 1;
+			claim_tc_card(sid);
+			pmagbafb_init_one(sid);
+		}
+		return found ? 0 : -ENODEV;
+	} else {
+		return -ENODEV;
+	}
+}
+
+module_init(pmagbafb_init);
+MODULE_LICENSE("GPL");
-- 
cgit v1.2.3