1 files changed, 477 insertions, 0 deletions
diff --git a/drivers/video/geode/gx1fb_core.c b/drivers/video/geode/gx1fb_core.c
new file mode 100644
index 00000000..5a5d0928
--- /dev/null
+++ b/drivers/video/geode/gx1fb_core.c
@@ -0,0 +1,477 @@
+/*
+ * 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/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] = "";
+
+/* Modes relevant to the GX1 (taken from modedb.c) */
+static const struct fb_videomode __devinitdata gx1_modedb[] = {
+	/* 640x480-60 VESA */
+	{ NULL, 60, 640, 480, 39682,  48, 16, 33, 10, 96, 2,
+	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 640x480-75 VESA */
+	{ NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
+	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 640x480-85 VESA */
+	{ NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
+	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 800x600-60 VESA */
+	{ NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 800x600-75 VESA */
+	{ NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 800x600-85 VESA */
+	{ NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1024x768-60 VESA */
+	{ NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
+	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1024x768-75 VESA */
+	{ NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1024x768-85 VESA */
+	{ NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1280x960-60 VESA */
+	{ NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1280x960-85 VESA */
+	{ NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1280x1024-60 VESA */
+	{ NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1280x1024-75 VESA */
+	{ NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1280x1024-85 VESA */
+	{ NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+};
+
+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;
+
+	/* 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;
+	else
+		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+
+	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 __devinit gx1fb_map_video_memory(struct fb_info *info, struct pci_dev *dev)
+{
+	struct geodefb_par *par = info->par;
+	unsigned gx_base;
+	int fb_len;
+	int ret;
+
+	gx_base = gx1_gx_base();
+	if (!gx_base)
+		return -ENODEV;
+
+	ret = pci_enable_device(dev);
+	if (ret < 0)
+		return ret;
+
+	ret = pci_request_region(dev, 0, "gx1fb (video)");
+	if (ret < 0)
+		return ret;
+	par->vid_regs = pci_ioremap_bar(dev, 0);
+	if (!par->vid_regs)
+		return -ENOMEM;
+
+	if (!request_mem_region(gx_base + 0x8300, 0x100, "gx1fb (display controller)"))
+		return -EBUSY;
+	par->dc_regs = ioremap(gx_base + 0x8300, 0x100);
+	if (!par->dc_regs)
+		return -ENOMEM;
+
+	if ((fb_len = gx1_frame_buffer_size()) < 0)
+		return -ENOMEM;
+	info->fix.smem_start = gx_base + 0x800000;
+	info->fix.smem_len = fb_len;
+	info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
+	if (!info->screen_base)
+		return -ENOMEM;
+
+	dev_info(&dev->dev, "%d Kibyte of video memory at 0x%lx\n",
+		 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,
+};
+
+static struct fb_info * __devinit gx1fb_init_fbinfo(struct device *dev)
+{
+	struct geodefb_par *par;
+	struct fb_info *info;
+
+	/* Alloc enough space for the pseudo palette. */
+	info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, dev);
+	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 "gx1fb: invalid 'panel' option -- disabling flat panel\n");
+	if (!par->panel_x)
+		par->enable_crt = 1; /* fall back to CRT if no panel is specified */
+
+	if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
+		framebuffer_release(info);
+		return NULL;
+	}
+	return info;
+}
+
+static int __devinit gx1fb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	struct geodefb_par *par;
+	struct fb_info *info;
+	int ret;
+
+	info = gx1fb_init_fbinfo(&pdev->dev);
+	if (!info)
+		return -ENOMEM;
+	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, pdev)) < 0) {
+		dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n");
+		goto err;
+	}
+
+	ret = fb_find_mode(&info->var, info, mode_option,
+			   gx1_modedb, ARRAY_SIZE(gx1_modedb), NULL, 16);
+	if (ret == 0 || ret == 4) {
+		dev_err(&pdev->dev, "could not find valid video mode\n");
+		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;
+	}
+	pci_set_drvdata(pdev, info);
+	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);
+		pci_release_region(pdev, 0);
+	}
+	if (par->vid_regs) {
+		iounmap(par->vid_regs);
+		pci_release_region(pdev, 1);
+	}
+	if (par->dc_regs) {
+		iounmap(par->dc_regs);
+		release_mem_region(gx1_gx_base() + 0x8300, 0x100);
+	}
+
+	if (info) {
+		fb_dealloc_cmap(&info->cmap);
+		framebuffer_release(info);
+	}
+
+	return ret;
+}
+
+static void __devexit gx1fb_remove(struct pci_dev *pdev)
+{
+	struct fb_info *info = pci_get_drvdata(pdev);
+	struct geodefb_par *par = info->par;
+
+	unregister_framebuffer(info);
+
+	iounmap((void __iomem *)info->screen_base);
+	pci_release_region(pdev, 0);
+
+	iounmap(par->vid_regs);
+	pci_release_region(pdev, 1);
+
+	iounmap(par->dc_regs);
+	release_mem_region(gx1_gx_base() + 0x8300, 0x100);
+
+	fb_dealloc_cmap(&info->cmap);
+	pci_set_drvdata(pdev, NULL);
+
+	framebuffer_release(info);
+}
+
+#ifndef MODULE
+static void __init gx1fb_setup(char *options)
+{
+	char *this_opt;
+
+	if (!options || !*options)
+		return;
+
+	while ((this_opt = strsep(&options, ","))) {
+		if (!*this_opt)
+			continue;
+
+		if (!strncmp(this_opt, "mode:", 5))
+			strlcpy(mode_option, this_opt + 5, sizeof(mode_option));
+		else if (!strncmp(this_opt, "crt:", 4))
+			crt_option = !!simple_strtoul(this_opt + 4, NULL, 0);
+		else if (!strncmp(this_opt, "panel:", 6))
+			strlcpy(panel_option, this_opt + 6, sizeof(panel_option));
+		else
+			strlcpy(mode_option, this_opt, sizeof(mode_option));
+	}
+}
+#endif
+
+static struct pci_device_id gx1fb_id_table[] = {
+	{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_VIDEO,
+	  PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16,
+	  0xff0000, 0 },
+	{ 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, gx1fb_id_table);
+
+static struct pci_driver gx1fb_driver = {
+	.name		= "gx1fb",
+	.id_table	= gx1fb_id_table,
+	.probe		= gx1fb_probe,
+	.remove		= __devexit_p(gx1fb_remove),
+};
+
+static int __init gx1fb_init(void)
+{
+#ifndef MODULE
+	char *option = NULL;
+
+	if (fb_get_options("gx1fb", &option))
+		return -ENODEV;
+	gx1fb_setup(option);
+#endif
+	return pci_register_driver(&gx1fb_driver);
+}
+
+static void __devexit gx1fb_cleanup(void)
+{
+	pci_unregister_driver(&gx1fb_driver);
+}
+
+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");