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/tx3912fb.c | 328 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 328 insertions(+)
 create mode 100644 drivers/video/tx3912fb.c

(limited to 'drivers/video/tx3912fb.c')

diff --git a/drivers/video/tx3912fb.c b/drivers/video/tx3912fb.c
new file mode 100644
index 000000000000..39d9ca71856b
--- /dev/null
+++ b/drivers/video/tx3912fb.c
@@ -0,0 +1,328 @@
+/*
+ *  drivers/video/tx3912fb.c
+ *
+ *  Copyright (C) 1999 Harald Koerfgen
+ *  Copyright (C) 2001 Steven Hill (sjhill@realitydiluted.com)
+ *
+ * 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.
+ *
+ *  Framebuffer for LCD controller in TMPR3912/05 and PR31700 processors
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/tty.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/pm.h>
+#include <linux/fb.h>
+#include <asm/io.h>
+#include <asm/bootinfo.h>
+#include <asm/uaccess.h>
+#include <asm/tx3912.h>
+#include <video/tx3912.h>
+
+/*
+ * Frame buffer, palette and console structures
+ */
+static struct fb_info fb_info;
+static u32 cfb8[16];
+
+static struct fb_fix_screeninfo tx3912fb_fix __initdata = {
+	.id =		"tx3912fb",
+	.smem_len =	((240 * 320)/2),
+	.type =		FB_TYPE_PACKED_PIXELS,
+	.visual =	FB_VISUAL_TRUECOLOR, 
+	.xpanstep =	1,
+	.ypanstep =	1,
+	.ywrapstep =	1,
+	.accel =	FB_ACCEL_NONE,
+};
+
+static struct fb_var_screeninfo tx3912fb_var = {
+	.xres =		240,
+	.yres =		320,
+	.xres_virtual =	240,
+	.yres_virtual =	320,
+	.bits_per_pixel =4,
+	.red =		{ 0, 4, 0 },	/* ??? */
+	.green =	{ 0, 4, 0 },
+	.blue =		{ 0, 4, 0 },
+	.activate =	FB_ACTIVATE_NOW,
+	.width =	-1,
+	.height =	-1,
+	.pixclock =	20000,
+	.left_margin =	64,
+	.right_margin =	64,
+	.upper_margin =	32,
+	.lower_margin =	32,
+	.hsync_len =	64,
+	.vsync_len =	2,
+	.vmode =	FB_VMODE_NONINTERLACED,
+};
+
+/*
+ * Interface used by the world
+ */
+int tx3912fb_init(void);
+
+static int tx3912fb_setcolreg(u_int regno, u_int red, u_int green,
+			      u_int blue, u_int transp,
+			      struct fb_info *info);
+
+/*
+ * Macros
+ */
+#define get_line_length(xres_virtual, bpp) \
+                (u_long) (((int) xres_virtual * (int) bpp + 7) >> 3)
+
+/*
+ * Frame buffer operations structure used by console driver
+ */
+static struct fb_ops tx3912fb_ops = {
+	.owner		= THIS_MODULE,
+	.fb_setcolreg	= tx3912fb_setcolreg,
+	.fb_fillrect	= cfb_fillrect,
+	.fb_copyarea	= cfb_copyarea,
+	.fb_imageblit	= cfb_imageblit,
+	.fb_cursor	= soft_cursor,
+};
+
+static int tx3912fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	/*
+	 * Memory limit
+	 */
+	line_length =
+	    get_line_length(var->xres_virtual, var->bits_per_pixel);
+	if ((line_length * var->yres_virtual) > info->fix.smem_len)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static int tx3912fb_set_par(struct fb_info *info)
+{
+	u_long tx3912fb_paddr = 0;
+
+	/* Disable the video logic */
+	outl(inl(TX3912_VIDEO_CTRL1) &
+	     ~(TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON),
+	     TX3912_VIDEO_CTRL1);
+	udelay(200);
+
+	/* Set start address for DMA transfer */
+	outl(tx3912fb_paddr, TX3912_VIDEO_CTRL3);
+
+	/* Set end address for DMA transfer */
+	outl((tx3912fb_paddr + tx3912fb_fix.smem_len + 1), TX3912_VIDEO_CTRL4);
+
+	/* Set the pixel depth */
+	switch (info->var.bits_per_pixel) {
+	case 1:
+		/* Monochrome */
+		outl(inl(TX3912_VIDEO_CTRL1) &
+		     ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+		info->fix.visual = FB_VISUAL_MONO10;
+		break;
+	case 4:
+		/* 4-bit gray */
+		outl(inl(TX3912_VIDEO_CTRL1) &
+		     ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+		outl(inl(TX3912_VIDEO_CTRL1) |
+		     TX3912_VIDEO_CTRL1_BITSEL_4BIT_GRAY,
+		     TX3912_VIDEO_CTRL1);
+		info->fix.visual = FB_VISUAL_TRUECOLOR;
+		break;
+	case 8:
+		/* 8-bit color */
+		outl(inl(TX3912_VIDEO_CTRL1) &
+		     ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+		outl(inl(TX3912_VIDEO_CTRL1) |
+		     TX3912_VIDEO_CTRL1_BITSEL_8BIT_COLOR,
+		     TX3912_VIDEO_CTRL1);
+		info->fix.visual = FB_VISUAL_TRUECOLOR;
+		break;
+	case 2:
+	default:
+		/* 2-bit gray */
+		outl(inl(TX3912_VIDEO_CTRL1) &
+		     ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+		outl(inl(TX3912_VIDEO_CTRL1) |
+		     TX3912_VIDEO_CTRL1_BITSEL_2BIT_GRAY,
+		     TX3912_VIDEO_CTRL1);
+		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+		break;
+	}
+
+	/* Enable the video clock */
+	outl(inl(TX3912_CLK_CTRL) | TX3912_CLK_CTRL_ENVIDCLK,
+	     TX3912_CLK_CTRL);
+
+	/* Unfreeze video logic and enable DF toggle */
+	outl(inl(TX3912_VIDEO_CTRL1) &
+	     ~(TX3912_VIDEO_CTRL1_ENFREEZEFRAME |
+	       TX3912_VIDEO_CTRL1_DFMODE)
+	     , TX3912_VIDEO_CTRL1);
+	udelay(200);
+
+	/* Enable the video logic */
+	outl(inl(TX3912_VIDEO_CTRL1) |
+	     (TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON),
+	     TX3912_VIDEO_CTRL1);
+
+	info->fix.line_length = get_line_length(var->xres_virtual,
+					    var->bits_per_pixel);
+}
+
+/*
+ * Set a single color register
+ */
+static int tx3912fb_setcolreg(u_int regno, u_int red, u_int green,
+			      u_int blue, u_int transp,
+			      struct fb_info *info)
+{
+	if (regno > 255)
+		return 1;
+
+	if (regno < 16)
+		((u32 *)(info->pseudo_palette))[regno] = ((red & 0xe000) >> 8)
+		    | ((green & 0xe000) >> 11)
+		    | ((blue & 0xc000) >> 14);
+	return 0;
+}
+
+int __init tx3912fb_setup(char *options);
+
+/*
+ * Initialization of the framebuffer
+ */
+int __init tx3912fb_init(void)
+{
+	u_long tx3912fb_paddr = 0;
+	int size = (info->var.bits_per_pixel == 8) ? 256 : 16;
+	char *option = NULL;
+
+	if (fb_get_options("tx3912fb", &option))
+		return -ENODEV;
+	tx3912fb_setup(option);
+
+	/* Disable the video logic */
+	outl(inl(TX3912_VIDEO_CTRL1) &
+	     ~(TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON),
+	     TX3912_VIDEO_CTRL1);
+	udelay(200);
+
+	/* Set start address for DMA transfer */
+	outl(tx3912fb_paddr, TX3912_VIDEO_CTRL3);
+
+	/* Set end address for DMA transfer */
+	outl((tx3912fb_paddr + tx3912fb_fix.smem_len + 1), TX3912_VIDEO_CTRL4);
+
+	/* Set the pixel depth */
+	switch (tx3912fb_var.bits_per_pixel) {
+	case 1:
+		/* Monochrome */
+		outl(inl(TX3912_VIDEO_CTRL1) &
+		     ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+		tx3912fb_fix.visual = FB_VISUAL_MONO10;
+		break;
+	case 4:
+		/* 4-bit gray */
+		outl(inl(TX3912_VIDEO_CTRL1) &
+		     ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+		outl(inl(TX3912_VIDEO_CTRL1) |
+		     TX3912_VIDEO_CTRL1_BITSEL_4BIT_GRAY,
+		     TX3912_VIDEO_CTRL1);
+		tx3912fb_fix.visual = FB_VISUAL_TRUECOLOR;
+		tx3912fb_fix.grayscale = 1;
+		break;
+	case 8:
+		/* 8-bit color */
+		outl(inl(TX3912_VIDEO_CTRL1) &
+		     ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+		outl(inl(TX3912_VIDEO_CTRL1) |
+		     TX3912_VIDEO_CTRL1_BITSEL_8BIT_COLOR,
+		     TX3912_VIDEO_CTRL1);
+		tx3912fb_fix.visual = FB_VISUAL_TRUECOLOR;
+		break;
+	case 2:
+	default:
+		/* 2-bit gray */
+		outl(inl(TX3912_VIDEO_CTRL1) &
+		     ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+		outl(inl(TX3912_VIDEO_CTRL1) |
+		     TX3912_VIDEO_CTRL1_BITSEL_2BIT_GRAY,
+		     TX3912_VIDEO_CTRL1);
+		tx3912fb_fix.visual = FB_VISUAL_PSEUDOCOLOR;
+		tx3912fb_fix.grayscale = 1;
+		break;
+	}
+
+	/* Enable the video clock */
+	outl(inl(TX3912_CLK_CTRL) | TX3912_CLK_CTRL_ENVIDCLK,
+		TX3912_CLK_CTRL);
+
+	/* Unfreeze video logic and enable DF toggle */
+	outl(inl(TX3912_VIDEO_CTRL1) &
+		~(TX3912_VIDEO_CTRL1_ENFREEZEFRAME | TX3912_VIDEO_CTRL1_DFMODE),
+		TX3912_VIDEO_CTRL1);
+	udelay(200);
+
+	/* Clear the framebuffer */
+	memset((void *) tx3912fb_fix.smem_start, 0xff, tx3912fb_fix.smem_len);
+	udelay(200);
+
+	/* Enable the video logic */
+	outl(inl(TX3912_VIDEO_CTRL1) |
+		(TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON),
+		TX3912_VIDEO_CTRL1);
+
+	/*
+	 * Memory limit
+	 */
+	tx3912fb_fix.line_length =
+	    get_line_length(tx3912fb_var.xres_virtual, tx3912fb_var.bits_per_pixel);
+	if ((tx3912fb_fix.line_length * tx3912fb_var.yres_virtual) > tx3912fb_fix.smem_len)
+		return -ENOMEM;
+
+	fb_info.fbops = &tx3912fb_ops;
+	fb_info.var = tx3912fb_var;
+	fb_info.fix = tx3912fb_fix;
+	fb_info.pseudo_palette = pseudo_palette;
+	fb_info.flags = FBINFO_DEFAULT;
+
+	/* Clear the framebuffer */
+	memset((void *) fb_info.fix.smem_start, 0xff, fb_info.fix.smem_len);
+	udelay(200);
+
+	fb_alloc_cmap(&info->cmap, size, 0);
+
+	if (register_framebuffer(&fb_info) < 0)
+		return -1;
+
+	printk(KERN_INFO "fb%d: TX3912 frame buffer using %uKB.\n",
+	       fb_info.node, (u_int) (fb_info.fix.smem_len >> 10));
+	return 0;
+}
+
+int __init tx3912fb_setup(char *options)
+{
+	char *this_opt;
+
+	if (!options || !*options)
+		return 0;
+
+	while ((this_opt = strsep(&options, ","))) {
+		if (!strncmp(options, "bpp:", 4))	
+			tx3912fb_var.bits_per_pixel = simple_strtoul(options+4, NULL, 0);
+	}	
+	return 0;
+}
+
+module_init(tx3912fb_init);
+MODULE_LICENSE("GPL");
-- 
cgit