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!

1 files changed, 359 insertions, 0 deletions

diff --git a/drivers/video/geode/gx1fb_core.c b/drivers/video/geode/gx1fb_core.c
new file mode 100644
index 000000000000..83830d24bcda
--- /dev/null
+++ b/drivers/video/geode/gx1fb_core.c
@@ -0,0 +1,359 @@
+/*
+ * drivers/video/geode/gx1fb_core.c
+ *   -- Geode GX1 framebuffer driver
+ *
+ * Copyright (C) 2005 Arcom Control Systems Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.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/fb.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+
+#include "geodefb.h"
+#include "display_gx1.h"
+#include "video_cs5530.h"
+
+static char mode_option[32] = "640x480-16@60";
+static int  crt_option = 1;
+static char panel_option[32] = "";
+
+static int gx1_line_delta(int xres, int bpp)
+{
+	int line_delta = xres * (bpp >> 3);
+
+	if (line_delta > 2048)
+		line_delta = 4096;
+	else if (line_delta > 1024)
+		line_delta = 2048;
+	else
+		line_delta = 1024;
+	return line_delta;
+}
+
+static int gx1fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	struct geodefb_par *par = info->par;
+
+	printk(KERN_DEBUG "%s()\n", __FUNCTION__);
+
+	/* Maximum resolution is 1280x1024. */
+	if (var->xres > 1280 || var->yres > 1024)
+		return -EINVAL;
+
+	if (par->panel_x && (var->xres > par->panel_x || var->yres > par->panel_y))
+		return -EINVAL;
+
+	/* Only 16 bpp and 8 bpp is supported by the hardware. */
+	if (var->bits_per_pixel == 16) {
+		var->red.offset   = 11; var->red.length   = 5;
+		var->green.offset =  5; var->green.length = 6;
+		var->blue.offset  =  0; var->blue.length  = 5;
+		var->transp.offset = 0; var->transp.length = 0;
+	} else if (var->bits_per_pixel == 8) {
+		var->red.offset   = 0; var->red.length   = 8;
+		var->green.offset = 0; var->green.length = 8;
+		var->blue.offset  = 0; var->blue.length  = 8;
+		var->transp.offset = 0; var->transp.length = 0;
+	} else
+		return -EINVAL;
+
+	/* Enough video memory? */
+	if (gx1_line_delta(var->xres, var->bits_per_pixel) * var->yres > info->fix.smem_len)
+		return -EINVAL;
+
+	/* FIXME: Check timing parameters here? */
+
+	return 0;
+}
+
+static int gx1fb_set_par(struct fb_info *info)
+{
+	struct geodefb_par *par = info->par;
+
+	if (info->var.bits_per_pixel == 16) {
+		info->fix.visual = FB_VISUAL_TRUECOLOR;
+		fb_dealloc_cmap(&info->cmap);
+	} else {
+		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+		fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0);
+	}
+
+	info->fix.line_length = gx1_line_delta(info->var.xres, info->var.bits_per_pixel);
+
+	par->dc_ops->set_mode(info);
+
+	return 0;
+}
+
+static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
+{
+	chan &= 0xffff;
+	chan >>= 16 - bf->length;
+	return chan << bf->offset;
+}
+
+static int gx1fb_setcolreg(unsigned regno, unsigned red, unsigned green,
+			   unsigned blue, unsigned transp,
+			   struct fb_info *info)
+{
+	struct geodefb_par *par = info->par;
+
+	if (info->var.grayscale) {
+		/* grayscale = 0.30*R + 0.59*G + 0.11*B */
+		red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
+	}
+
+	/* Truecolor has hardware independent palette */
+	if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
+		u32 *pal = info->pseudo_palette;
+		u32 v;
+
+		if (regno >= 16)
+			return -EINVAL;
+
+		v  = chan_to_field(red, &info->var.red);
+		v |= chan_to_field(green, &info->var.green);
+		v |= chan_to_field(blue, &info->var.blue);
+
+		pal[regno] = v;
+	} else {
+		if (regno >= 256)
+			return -EINVAL;
+
+		par->dc_ops->set_palette_reg(info, regno, red, green, blue);
+	}
+
+	return 0;
+}
+
+static int gx1fb_blank(int blank_mode, struct fb_info *info)
+{
+	struct geodefb_par *par = info->par;
+
+	return par->vid_ops->blank_display(info, blank_mode);
+}
+
+static int __init gx1fb_map_video_memory(struct fb_info *info)
+{
+	struct geodefb_par *par = info->par;
+	unsigned gx_base;
+	int fb_len;
+
+	gx_base = gx1_gx_base();
+	if (!gx_base)
+		return -ENODEV;
+
+	par->vid_dev = pci_get_device(PCI_VENDOR_ID_CYRIX,
+				      PCI_DEVICE_ID_CYRIX_5530_VIDEO, NULL);
+	if (!par->vid_dev)
+		return -ENODEV;
+
+	par->vid_regs = ioremap(pci_resource_start(par->vid_dev, 1),
+				pci_resource_len(par->vid_dev, 1));
+	if (!par->vid_regs)
+		return -ENOMEM;
+
+	par->dc_regs = ioremap(gx_base + 0x8300, 0x100);
+	if (!par->dc_regs)
+		return -ENOMEM;
+
+	info->fix.smem_start = gx_base + 0x800000;
+	if ((fb_len = gx1_frame_buffer_size()) < 0)
+		return -ENOMEM;
+	info->fix.smem_len = fb_len;
+	info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
+	if (!info->screen_base)
+		return -ENOMEM;
+
+	printk(KERN_INFO "%s: %d Kibyte of video memory at 0x%lx\n",
+	       info->fix.id, info->fix.smem_len / 1024, info->fix.smem_start);
+
+	return 0;
+}
+
+static int parse_panel_option(struct fb_info *info)
+{
+	struct geodefb_par *par = info->par;
+
+	if (strcmp(panel_option, "") != 0) {
+		int x, y;
+		char *s;
+		x = simple_strtol(panel_option, &s, 10);
+		if (!x)
+			return -EINVAL;
+		y = simple_strtol(s + 1, NULL, 10);
+		if (!y)
+			return -EINVAL;
+		par->panel_x = x;
+		par->panel_y = y;
+	}
+	return 0;
+}
+
+static struct fb_ops gx1fb_ops = {
+	.owner		= THIS_MODULE,
+	.fb_check_var	= gx1fb_check_var,
+	.fb_set_par	= gx1fb_set_par,
+	.fb_setcolreg	= gx1fb_setcolreg,
+	.fb_blank       = gx1fb_blank,
+	/* No HW acceleration for now. */
+	.fb_fillrect	= cfb_fillrect,
+	.fb_copyarea	= cfb_copyarea,
+	.fb_imageblit	= cfb_imageblit,
+	.fb_cursor	= soft_cursor,
+};
+
+static struct fb_info * __init gx1fb_init_fbinfo(void)
+{
+	struct fb_info *info;
+	struct geodefb_par *par;
+
+	/* Alloc enough space for the pseudo palette. */
+	info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, NULL);
+	if (!info)
+		return NULL;
+
+	par = info->par;
+
+	strcpy(info->fix.id, "GX1");
+
+	info->fix.type		= FB_TYPE_PACKED_PIXELS;
+	info->fix.type_aux	= 0;
+	info->fix.xpanstep	= 0;
+	info->fix.ypanstep	= 0;
+	info->fix.ywrapstep	= 0;
+	info->fix.accel		= FB_ACCEL_NONE;
+
+	info->var.nonstd	= 0;
+	info->var.activate	= FB_ACTIVATE_NOW;
+	info->var.height	= -1;
+	info->var.width	= -1;
+	info->var.accel_flags = 0;
+	info->var.vmode	= FB_VMODE_NONINTERLACED;
+
+	info->fbops		= &gx1fb_ops;
+	info->flags		= FBINFO_DEFAULT;
+	info->node		= -1;
+
+	info->pseudo_palette	= (void *)par + sizeof(struct geodefb_par);
+
+	info->var.grayscale	= 0;
+
+	/* CRT and panel options */
+	par->enable_crt = crt_option;
+	if (parse_panel_option(info) < 0)
+		printk(KERN_WARNING "%s: invalid 'panel' option -- disabling flat panel\n",
+		       info->fix.id);
+	if (!par->panel_x)
+		par->enable_crt = 1; /* fall back to CRT if no panel is specified */
+
+	return info;
+}
+
+
+static struct fb_info *gx1fb_info;
+
+static int __init gx1fb_init(void)
+{
+	struct fb_info *info;
+        struct geodefb_par *par;
+	int ret;
+
+#ifndef MODULE
+	if (fb_get_options("gx1fb", NULL))
+		return -ENODEV;
+#endif
+
+	info = gx1fb_init_fbinfo();
+	if (!info)
+		return -ENOMEM;
+	gx1fb_info = info;
+
+	par = info->par;
+
+	/* GX1 display controller and CS5530 video device */
+	par->dc_ops  = &gx1_dc_ops;
+	par->vid_ops = &cs5530_vid_ops;
+
+	if ((ret = gx1fb_map_video_memory(info)) < 0) {
+		printk(KERN_ERR "%s: gx1fb_map_video_memory() failed\n", info->fix.id);
+		goto err;
+	}
+
+	ret = fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 16);
+	if (ret == 0 || ret == 4) {
+		printk(KERN_ERR "%s: could not find valid video mode\n", info->fix.id);
+		ret = -EINVAL;
+		goto err;
+	}
+
+        /* Clear the frame buffer of garbage. */
+        memset_io(info->screen_base, 0, info->fix.smem_len);
+
+	gx1fb_check_var(&info->var, info);
+	gx1fb_set_par(info);
+
+	if (register_framebuffer(info) < 0) {
+		ret = -EINVAL;
+		goto err;
+	}
+	printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, info->fix.id);
+	return 0;
+
+  err:
+	if (info->screen_base)
+		iounmap(info->screen_base);
+	if (par->vid_regs)
+		iounmap(par->vid_regs);
+	if (par->dc_regs)
+		iounmap(par->dc_regs);
+	if (par->vid_dev)
+		pci_dev_put(par->vid_dev);
+	if (info)
+		framebuffer_release(info);
+	return ret;
+}
+
+static void __exit gx1fb_cleanup(void)
+{
+	struct fb_info *info = gx1fb_info;
+	struct geodefb_par *par = gx1fb_info->par;
+
+	unregister_framebuffer(info);
+
+	iounmap((void __iomem *)info->screen_base);
+	iounmap(par->vid_regs);
+	iounmap(par->dc_regs);
+
+	pci_dev_put(par->vid_dev);
+
+	framebuffer_release(info);
+}
+
+module_init(gx1fb_init);
+module_exit(gx1fb_cleanup);
+
+module_param_string(mode, mode_option, sizeof(mode_option), 0444);
+MODULE_PARM_DESC(mode, "video mode (<x>x<y>[-<bpp>][@<refr>])");
+
+module_param_named(crt, crt_option, int, 0444);
+MODULE_PARM_DESC(crt, "enable CRT output. 0 = off, 1 = on (default)");
+
+module_param_string(panel, panel_option, sizeof(panel_option), 0444);
+MODULE_PARM_DESC(panel, "size of attached flat panel (<x>x<y>)");
+
+MODULE_DESCRIPTION("framebuffer driver for the AMD Geode GX1");
+MODULE_LICENSE("GPL");