[net-next-2.6.git] / drivers / video / geode / gx1fb_core.c

/*
 * 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 __initdata 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 __init 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 * __init 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 __init 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 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		= 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 __exit 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");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* drivers/video/geode/gx1fb_core.c
	3	* -- Geode GX1 framebuffer driver
	4	*
	5	* Copyright (C) 2005 Arcom Control Systems Ltd.
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/kernel.h>
	15	#include <linux/errno.h>
	16	#include <linux/string.h>
	17	#include <linux/mm.h>
1da177e4 LT	18	#include <linux/delay.h>
	19	#include <linux/fb.h>
	20	#include <linux/init.h>
	21	#include <linux/pci.h>
	22
	23	#include "geodefb.h"
	24	#include "display_gx1.h"
	25	#include "video_cs5530.h"
	26
	27	static char mode_option[32] = "640x480-16@60";
	28	static int crt_option = 1;
	29	static char panel_option[32] = "";
	30
53eed4ec DV	31	/* Modes relevant to the GX1 (taken from modedb.c) */
	32	static const struct fb_videomode __initdata gx1_modedb[] = {
	33	/* 640x480-60 VESA */
	34	{ NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2,
	35	0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	36	/* 640x480-75 VESA */
	37	{ NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
	38	0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	39	/* 640x480-85 VESA */
	40	{ NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
	41	0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	42	/* 800x600-60 VESA */
	43	{ NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
	44	FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT,
	45	FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	46	/* 800x600-75 VESA */
	47	{ NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
	48	FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT,
	49	FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	50	/* 800x600-85 VESA */
	51	{ NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
	52	FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT,
	53	FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	54	/* 1024x768-60 VESA */
	55	{ NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
	56	0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	57	/* 1024x768-75 VESA */
	58	{ NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
	59	FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT,
	60	FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	61	/* 1024x768-85 VESA */
	62	{ NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
	63	FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT,
	64	FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	65	/* 1280x960-60 VESA */
	66	{ NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
	67	FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT,
	68	FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	69	/* 1280x960-85 VESA */
	70	{ NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
	71	FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT,
	72	FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	73	/* 1280x1024-60 VESA */
	74	{ NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
	75	FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT,
	76	FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	77	/* 1280x1024-75 VESA */
	78	{ NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
	79	FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT,
	80	FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	81	/* 1280x1024-85 VESA */
	82	{ NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
	83	FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT,
	84	FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	85	};
	86
1da177e4 LT	87	static int gx1_line_delta(int xres, int bpp)
	88	{
	89	int line_delta = xres * (bpp >> 3);
	90
	91	if (line_delta > 2048)
	92	line_delta = 4096;
	93	else if (line_delta > 1024)
	94	line_delta = 2048;
	95	else
	96	line_delta = 1024;
	97	return line_delta;
	98	}
	99
	100	static int gx1fb_check_var(struct fb_var_screeninfo var, struct fb_info info)
	101	{
	102	struct geodefb_par *par = info->par;
	103
1da177e4 LT	104	/* Maximum resolution is 1280x1024. */
	105	if (var->xres > 1280 \|\| var->yres > 1024)
	106	return -EINVAL;
	107
	108	if (par->panel_x && (var->xres > par->panel_x \|\| var->yres > par->panel_y))
	109	return -EINVAL;
	110
	111	/* Only 16 bpp and 8 bpp is supported by the hardware. */
	112	if (var->bits_per_pixel == 16) {
	113	var->red.offset = 11; var->red.length = 5;
	114	var->green.offset = 5; var->green.length = 6;
	115	var->blue.offset = 0; var->blue.length = 5;
	116	var->transp.offset = 0; var->transp.length = 0;
	117	} else if (var->bits_per_pixel == 8) {
	118	var->red.offset = 0; var->red.length = 8;
	119	var->green.offset = 0; var->green.length = 8;
	120	var->blue.offset = 0; var->blue.length = 8;
	121	var->transp.offset = 0; var->transp.length = 0;
	122	} else
	123	return -EINVAL;
	124
	125	/* Enough video memory? */
	126	if (gx1_line_delta(var->xres, var->bits_per_pixel) * var->yres > info->fix.smem_len)
	127	return -EINVAL;
	128
	129	/* FIXME: Check timing parameters here? */
	130
	131	return 0;
	132	}
	133
	134	static int gx1fb_set_par(struct fb_info *info)
	135	{
	136	struct geodefb_par *par = info->par;
	137
35887b1c	138	if (info->var.bits_per_pixel == 16)
1da177e4	139	info->fix.visual = FB_VISUAL_TRUECOLOR;
35887b1c	140	else
1da177e4	141	info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
1da177e4 LT	142
	143	info->fix.line_length = gx1_line_delta(info->var.xres, info->var.bits_per_pixel);
	144
	145	par->dc_ops->set_mode(info);
	146
	147	return 0;
	148	}
	149
	150	static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
	151	{
	152	chan &= 0xffff;
	153	chan >>= 16 - bf->length;
	154	return chan << bf->offset;
	155	}
	156
	157	static int gx1fb_setcolreg(unsigned regno, unsigned red, unsigned green,
	158	unsigned blue, unsigned transp,
	159	struct fb_info *info)
	160	{
	161	struct geodefb_par *par = info->par;
	162
	163	if (info->var.grayscale) {
	164	/* grayscale = 0.30R + 0.59G + 0.11B /
	165	red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
	166	}
	167
	168	/* Truecolor has hardware independent palette */
	169	if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
	170	u32 *pal = info->pseudo_palette;
	171	u32 v;
	172
	173	if (regno >= 16)
	174	return -EINVAL;
	175
	176	v = chan_to_field(red, &info->var.red);
	177	v \|= chan_to_field(green, &info->var.green);
	178	v \|= chan_to_field(blue, &info->var.blue);
	179
	180	pal[regno] = v;
	181	} else {
	182	if (regno >= 256)
	183	return -EINVAL;
	184
	185	par->dc_ops->set_palette_reg(info, regno, red, green, blue);
	186	}
	187
	188	return 0;
	189	}
	190
	191	static int gx1fb_blank(int blank_mode, struct fb_info *info)
	192	{
	193	struct geodefb_par *par = info->par;
	194
	195	return par->vid_ops->blank_display(info, blank_mode);
	196	}
	197
53eed4ec	198	static int __init gx1fb_map_video_memory(struct fb_info info, struct pci_dev dev)
1da177e4 LT	199	{
	200	struct geodefb_par *par = info->par;
	201	unsigned gx_base;
	202	int fb_len;
53eed4ec	203	int ret;
1da177e4 LT	204
	205	gx_base = gx1_gx_base();
	206	if (!gx_base)
	207	return -ENODEV;
	208
53eed4ec DV	209	ret = pci_enable_device(dev);
	210	if (ret < 0)
	211	return ret;
1da177e4	212
a80da738	213	ret = pci_request_region(dev, 0, "gx1fb (video)");
53eed4ec DV	214	if (ret < 0)
53eed4ec DV	215	return ret;
3c36aa5c	216	par->vid_regs = pci_ioremap_bar(dev, 0);
1da177e4 LT	217	if (!par->vid_regs)
	218	return -ENOMEM;
	219
53eed4ec DV	220	if (!request_mem_region(gx_base + 0x8300, 0x100, "gx1fb (display controller)"))
53eed4ec DV	221	return -EBUSY;
1da177e4 LT	222	par->dc_regs = ioremap(gx_base + 0x8300, 0x100);
	223	if (!par->dc_regs)
	224	return -ENOMEM;
	225
1da177e4 LT	226	if ((fb_len = gx1_frame_buffer_size()) < 0)
1da177e4 LT	227	return -ENOMEM;
a80da738	228	info->fix.smem_start = gx_base + 0x800000;
1da177e4 LT	229	info->fix.smem_len = fb_len;
	230	info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
	231	if (!info->screen_base)
	232	return -ENOMEM;
	233
53eed4ec DV	234	dev_info(&dev->dev, "%d Kibyte of video memory at 0x%lx\n",
53eed4ec DV	235	info->fix.smem_len / 1024, info->fix.smem_start);
1da177e4 LT	236
	237	return 0;
	238	}
	239
	240	static int parse_panel_option(struct fb_info *info)
	241	{
	242	struct geodefb_par *par = info->par;
	243
	244	if (strcmp(panel_option, "") != 0) {
	245	int x, y;
	246	char *s;
	247	x = simple_strtol(panel_option, &s, 10);
	248	if (!x)
	249	return -EINVAL;
	250	y = simple_strtol(s + 1, NULL, 10);
	251	if (!y)
	252	return -EINVAL;
	253	par->panel_x = x;
	254	par->panel_y = y;
	255	}
	256	return 0;
	257	}
	258
	259	static struct fb_ops gx1fb_ops = {
	260	.owner = THIS_MODULE,
	261	.fb_check_var = gx1fb_check_var,
	262	.fb_set_par = gx1fb_set_par,
	263	.fb_setcolreg = gx1fb_setcolreg,
	264	.fb_blank = gx1fb_blank,
	265	/* No HW acceleration for now. */
	266	.fb_fillrect = cfb_fillrect,
	267	.fb_copyarea = cfb_copyarea,
	268	.fb_imageblit = cfb_imageblit,
1da177e4 LT	269	};
1da177e4 LT	270
53eed4ec	271	static struct fb_info * __init gx1fb_init_fbinfo(struct device *dev)
1da177e4	272	{
1da177e4	273	struct geodefb_par *par;
53eed4ec	274	struct fb_info *info;
1da177e4 LT	275
1da177e4 LT	276	/* Alloc enough space for the pseudo palette. */
53eed4ec	277	info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, dev);
1da177e4 LT	278	if (!info)
	279	return NULL;
	280
	281	par = info->par;
	282
	283	strcpy(info->fix.id, "GX1");
	284
	285	info->fix.type = FB_TYPE_PACKED_PIXELS;
	286	info->fix.type_aux = 0;
	287	info->fix.xpanstep = 0;
	288	info->fix.ypanstep = 0;
	289	info->fix.ywrapstep = 0;
	290	info->fix.accel = FB_ACCEL_NONE;
	291
	292	info->var.nonstd = 0;
	293	info->var.activate = FB_ACTIVATE_NOW;
	294	info->var.height = -1;
	295	info->var.width = -1;
	296	info->var.accel_flags = 0;
	297	info->var.vmode = FB_VMODE_NONINTERLACED;
	298
	299	info->fbops = &gx1fb_ops;
	300	info->flags = FBINFO_DEFAULT;
	301	info->node = -1;
	302
	303	info->pseudo_palette = (void *)par + sizeof(struct geodefb_par);
	304
	305	info->var.grayscale = 0;
	306
	307	/* CRT and panel options */
	308	par->enable_crt = crt_option;
	309	if (parse_panel_option(info) < 0)
53eed4ec	310	printk(KERN_WARNING "gx1fb: invalid 'panel' option -- disabling flat panel\n");
1da177e4 LT	311	if (!par->panel_x)
	312	par->enable_crt = 1; /* fall back to CRT if no panel is specified */
	313
35887b1c AS	314	if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
	315	framebuffer_release(info);
	316	return NULL;
	317	}
1da177e4 LT	318	return info;
	319	}
	320
53eed4ec	321	static int __init gx1fb_probe(struct pci_dev pdev, const struct pci_device_id id)
1da177e4	322	{
53eed4ec	323	struct geodefb_par *par;
1da177e4	324	struct fb_info *info;
1da177e4 LT	325	int ret;
1da177e4 LT	326
53eed4ec	327	info = gx1fb_init_fbinfo(&pdev->dev);
1da177e4 LT	328	if (!info)
1da177e4 LT	329	return -ENOMEM;
1da177e4 LT	330	par = info->par;
	331
	332	/* GX1 display controller and CS5530 video device */
	333	par->dc_ops = &gx1_dc_ops;
	334	par->vid_ops = &cs5530_vid_ops;
	335
53eed4ec DV	336	if ((ret = gx1fb_map_video_memory(info, pdev)) < 0) {
53eed4ec DV	337	dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n");
1da177e4 LT	338	goto err;
	339	}
	340
53eed4ec DV	341	ret = fb_find_mode(&info->var, info, mode_option,
53eed4ec DV	342	gx1_modedb, ARRAY_SIZE(gx1_modedb), NULL, 16);
1da177e4	343	if (ret == 0 \|\| ret == 4) {
53eed4ec	344	dev_err(&pdev->dev, "could not find valid video mode\n");
1da177e4 LT	345	ret = -EINVAL;
	346	goto err;
	347	}
	348
	349	/* Clear the frame buffer of garbage. */
	350	memset_io(info->screen_base, 0, info->fix.smem_len);
	351
	352	gx1fb_check_var(&info->var, info);
	353	gx1fb_set_par(info);
	354
	355	if (register_framebuffer(info) < 0) {
	356	ret = -EINVAL;
	357	goto err;
	358	}
53eed4ec	359	pci_set_drvdata(pdev, info);
1da177e4 LT	360	printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, info->fix.id);
	361	return 0;
	362
	363	err:
53eed4ec	364	if (info->screen_base) {
1da177e4	365	iounmap(info->screen_base);
53eed4ec DV	366	pci_release_region(pdev, 0);
	367	}
	368	if (par->vid_regs) {
1da177e4	369	iounmap(par->vid_regs);
53eed4ec DV	370	pci_release_region(pdev, 1);
	371	}
	372	if (par->dc_regs) {
1da177e4	373	iounmap(par->dc_regs);
53eed4ec DV	374	release_mem_region(gx1_gx_base() + 0x8300, 0x100);
	375	}
	376
35887b1c AS	377	if (info) {
35887b1c AS	378	fb_dealloc_cmap(&info->cmap);
1da177e4	379	framebuffer_release(info);
35887b1c AS	380	}
35887b1c AS	381
1da177e4 LT	382	return ret;
	383	}
	384
53eed4ec	385	static void gx1fb_remove(struct pci_dev *pdev)
1da177e4	386	{
53eed4ec DV	387	struct fb_info *info = pci_get_drvdata(pdev);
53eed4ec DV	388	struct geodefb_par *par = info->par;
1da177e4 LT	389
	390	unregister_framebuffer(info);
	391
	392	iounmap((void __iomem *)info->screen_base);
53eed4ec DV	393	pci_release_region(pdev, 0);
53eed4ec DV	394
1da177e4	395	iounmap(par->vid_regs);
53eed4ec DV	396	pci_release_region(pdev, 1);
53eed4ec DV	397
1da177e4	398	iounmap(par->dc_regs);
53eed4ec	399	release_mem_region(gx1_gx_base() + 0x8300, 0x100);
1da177e4	400
35887b1c	401	fb_dealloc_cmap(&info->cmap);
53eed4ec	402	pci_set_drvdata(pdev, NULL);
1da177e4 LT	403
	404	framebuffer_release(info);
	405	}
	406
c7b54477 AD	407	#ifndef MODULE
	408	static void __init gx1fb_setup(char *options)
	409	{
	410	char *this_opt;
	411
	412	if (!options \|\| !*options)
	413	return;
	414
	415	while ((this_opt = strsep(&options, ","))) {
	416	if (!*this_opt)
	417	continue;
	418
	419	if (!strncmp(this_opt, "mode:", 5))
	420	strlcpy(mode_option, this_opt + 5, sizeof(mode_option));
	421	else if (!strncmp(this_opt, "crt:", 4))
	422	crt_option = !!simple_strtoul(this_opt + 4, NULL, 0);
	423	else if (!strncmp(this_opt, "panel:", 6))
	424	strlcpy(panel_option, this_opt + 6, sizeof(panel_option));
	425	else
	426	strlcpy(mode_option, this_opt, sizeof(mode_option));
	427	}
	428	}
	429	#endif
	430
53eed4ec DV	431	static struct pci_device_id gx1fb_id_table[] = {
	432	{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_VIDEO,
	433	PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16,
	434	0xff0000, 0 },
	435	{ 0, }
	436	};
	437
	438	MODULE_DEVICE_TABLE(pci, gx1fb_id_table);
	439
	440	static struct pci_driver gx1fb_driver = {
	441	.name = "gx1fb",
	442	.id_table = gx1fb_id_table,
	443	.probe = gx1fb_probe,
	444	.remove = gx1fb_remove,
	445	};
	446
	447	static int __init gx1fb_init(void)
	448	{
	449	#ifndef MODULE
c7b54477 AD	450	char *option = NULL;
	451
	452	if (fb_get_options("gx1fb", &option))
53eed4ec	453	return -ENODEV;
c7b54477	454	gx1fb_setup(option);
53eed4ec DV	455	#endif
	456	return pci_register_driver(&gx1fb_driver);
	457	}
	458
	459	static void __exit gx1fb_cleanup(void)
	460	{
	461	pci_unregister_driver(&gx1fb_driver);
	462	}
	463
1da177e4 LT	464	module_init(gx1fb_init);
	465	module_exit(gx1fb_cleanup);
	466
	467	module_param_string(mode, mode_option, sizeof(mode_option), 0444);
	468	MODULE_PARM_DESC(mode, "video mode (<x>x<y>[-<bpp>][@<refr>])");
	469
	470	module_param_named(crt, crt_option, int, 0444);
	471	MODULE_PARM_DESC(crt, "enable CRT output. 0 = off, 1 = on (default)");
	472
	473	module_param_string(panel, panel_option, sizeof(panel_option), 0444);
	474	MODULE_PARM_DESC(panel, "size of attached flat panel (<x>x<y>)");
	475
	476	MODULE_DESCRIPTION("framebuffer driver for the AMD Geode GX1");
	477	MODULE_LICENSE("GPL");