pm3fb.c

S3C44B0X下的LCD （framebuffer）驱动资料与相关代码

/*
 *  linux/drivers/video/pm3fb.c -- 3DLabs Permedia3 frame buffer device
 *  
 *  Copyright (C) 2001 Romain Dolbeau <[e-mail]>
 *  Based on code written by:
 *           Sven Luther, <[e-mail]>
 *           Alan Hourihane, <[e-mail]>
 *           Russel King, <[e-mail]>
 *  Based on linux/drivers/video/skeletonfb.c:
 *	Copyright (C) 1997 Geert Uytterhoeven
 *  Based on linux/driver/video/pm2fb.c:
 *      Copyright (C) 1998-1999 Ilario Nardinocchi ([e-mail])
 *      Copyright (C) 1999 Jakub Jelinek ([e-mail])
 *
 *  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.
 *
 *  $Header: /cvsroot/linux/drivers/video/pm3fb.c,v 1.1 2002/02/25 19:11:06 marcelo Exp $
 *
 *  CHANGELOG:
 *  Mon Feb 11 10:35:48 MET 2002, v 1.4.11B: Cosmetic update.
 *  Wed Jan 23 14:16:59 MET 2002, v 1.4.11: Preliminary 2.5.x support, patch for 2.5.2.
 *  Wed Nov 28 11:08:29 MET 2001, v 1.4.10: potential bug fix for SDRAM-based board, patch for 2.4.16.
 *  Thu Sep 20 10:24:42 MET DST 2001, v 1.4.9: sync bug fix, preliminary flatpanel support, better timings.
 *  Tue Aug 28 10:13:01 MET DST 2001, v 1.4.8: memory timings check, minor bug fixes.
 *  Wed Jul 18 19:06:14 CEST 2001, v 1.4.7: Mode fix (800x600-100, 1024x768-100 changed), using HW panning + accel bug fix.
 *  Mon Jun 25 10:33:56 MET DST 2001, v 1.4.6: Depth 12 fix, chip reset ioctl, moved memory erase ioctl to DEBUG.
 *  Wed Jun 20 11:13:08 MET DST 2001, v 1.4.5: Fixed missing blinking cursor in 8bpp, code cleaning, memory erase IOCTL.
 *  Mon Jun 18 16:00:27 CEST 2001, v 1.4.4: Depth 12 (RGBA 4444) support, code cleaning.
 *  Fri Jun 15 13:53:01 CEST 2001, v 1.4.3: Removed warnings, depth 15 support, add 'depth' option.
 *  Thu Jun 14 10:13:52 MET DST 2001, v 1.4.2: Fixed depth switching bug, preliminary 15bpp (RGB5551) support.
 *  Thu Apr 12 11:16:45 MET DST 2001, v 1.4.1B: Doc updates.
 *  Fri Apr  6 11:12:53 MET DST 2001, v 1.4.1: Configure.help, minor cleanup
 *  Thu Mar 29 10:56:50 MET DST 2001, v 1.4.0: Module & module options support (note: linux patch changed, 2.2.19 added).
 *  Thu Mar 15 15:30:31 MET 2001, v 1.3.2: Fixed mirroring bug on little-endian.
 *  Wed Mar 14 21:25:54 CET 2001, v 1.3.1: Fixed bug in BlockMove (_bmov).
 *  Tue Mar 13 10:53:19 MET 2001, v 1.3.0: Character drawing hardware support (in all width between 1 and 16), fixes.
 *  Thu Mar  8 10:20:16 MET 2001, v 1.2.2: Better J2000 support, "font:" option.
 *  Tue Mar  6 21:25:04 CET 2001, v 1.2.1: Better acceleration support.
 *  Mon Mar  5 21:54:17 CET 2001, v 1.2.0: Partial acceleration support (clear & bmove)
 *  Mon Mar  5 12:52:15 CET 2001, v 1.1.3: Big pan_display fix.
 *  Sun Mar  4 22:21:50 CET 2001, v 1.1.2: (numerous) bug fixes.
 *  Fri Mar  2 15:54:07 CET 2001, v 1.1.1: Might have Appian J2000 support, resource mangement in 2.4
 *  Wed Feb 28 18:21:35 CET 2001, v 1.1.0: Might have multiple boards support (added, but not yest tested)
 *  Tue Feb 27 17:31:12 CET 2001, v 1.0.6: fixes boot-time mode select, add more default mode
 *  Tue Feb 27 14:01:36 CET 2001, v 1.0.5: fixes (1.0.4 was broken for 2.2), cleaning up
 *  Mon Feb 26 23:17:36 CET 2001, v 1.0.4: preliminary 2.4.x support, dropped (useless on pm3) partial product, more OF fix
 *  Mon Feb 26 20:59:05 CET 2001, v 1.0.3: No more shadow register (and wasted memory), endianess fix, use OF-preset resolution by default
 *  Wed Feb 21 22:09:30 CET 2001, v 1.0.2: Code cleaning for future multiboard support, better OF support, bugs fix
 *  Wed Feb 21 19:58:56 CET 2001, v 1.0.1: OpenFirmware support, fixed memory detection, better debug support, code cleaning
 *  Wed Feb 21 14:47:06 CET 2001, v 1.0.0: First working version
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/version.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/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/ioport.h>

#include <video/fbcon.h>
#include <video/fbcon-mfb.h>
#include <video/fbcon-cfb2.h>
#include <video/fbcon-cfb4.h>
#include <video/fbcon-cfb8.h>
#include <video/fbcon-cfb16.h>
#include <video/fbcon-cfb24.h>
#include <video/fbcon-cfb32.h>

#include <asm/io.h>
#include <asm/uaccess.h>

#ifdef CONFIG_FB_OF
#include <asm/prom.h>
#endif

#include "pm3fb.h"

/* ************************************* */
/* ***** The various "global" data ***** */
/* ************************************* */

/* those will need a rework for multiple board support */
/* Driver name */
static const char permedia3_name[16] = "Permedia3";

/* the fb_par struct, mandatory */
struct pm3fb_par {
	u32 pixclock;		/* pixclock in KHz */

	u32 width;		/* width of virtual screen */
	u32 height;		/* height of virtual screen */

	u32 hsstart;		/* horiz. sync start */
	u32 hsend;		/* horiz. sync end */
	u32 hbend;		/* horiz. blank end (also gate end) */
	u32 htotal;		/* total width (w/ sync & blank) */

	u32 vsstart;		/* vert. sync start */
	u32 vsend;		/* vert. sync end */
	u32 vbend;		/* vert. blank end */
	u32 vtotal;		/* total height (w/ sync & blank) */

	u32 stride;		/* screen stride */
	u32 base;		/* screen base (xoffset+yoffset) in 128 bits unit */
	/* NOTE : unlike other pm3 stuff above, stored *after* shiftbpp. don't ask */
	u32 depth;		/* screen depth (8, 12, 15, 16 or 32) */
	u32 video;		/* video control (hsync,vsync) */
};

/* memory timings */
struct pm3fb_timings
{
	unsigned long caps;
	unsigned long timings;
	unsigned long control;
	unsigned long refresh;
	unsigned long powerdown;
};
typedef enum pm3fb_timing_result { pm3fb_timing_ok, pm3fb_timing_problem, pm3fb_timing_retry } pm3fb_timing_result;
#define PM3FB_UNKNOWN_TIMING_VALUE ((unsigned long)-1)
#define PM3FB_UNKNOWN_TIMINGS { PM3FB_UNKNOWN_TIMING_VALUE, PM3FB_UNKNOWN_TIMING_VALUE, PM3FB_UNKNOWN_TIMING_VALUE, PM3FB_UNKNOWN_TIMING_VALUE, PM3FB_UNKNOWN_TIMING_VALUE }

/* the fb_info struct, mandatory */
struct pm3fb_info {
	struct fb_info_gen gen;
	unsigned long board_num; /* internal board number */
	unsigned long use_current;
	struct pm3fb_par *current_par;
	struct pci_dev *dev;    /* PCI device */
#ifdef SUPPORT_FB_OF
	struct device_node *dn; /* OF node for the PCI device */
#endif /* SUPPORT_FB_OF */
	unsigned long board_type; /* index in the cardbase */
	unsigned char *fb_base;	/* framebuffer memory base */
	u32 fb_size;		/* framebuffer memory size */
	unsigned char *p_fb;	/* physical address of frame buffer */
	unsigned char *v_fb;	/* virtual address of frame buffer */
	unsigned char *pIOBase;	/* physical address of registers region, must be rg_base or rg_base+PM2_REGS_SIZE depending on the host endianness */
	unsigned char *vIOBase;	/* address of registers after ioremap() */
	struct {
		u8 transp;
		u8 red;
		u8 green;
		u8 blue;
	} palette[256];
	union {
#ifdef FBCON_HAS_CFB16
		u16 cmap12[16]; /* RGBA 4444 */
		u16 cmap15[16]; /* RGBA 5551 */
		u16 cmap16[16]; /* RGBA 5650 */
#endif
#ifdef FBCON_HAS_CFB32
		u32 cmap32[16];
#endif
	} cmap;
	struct pm3fb_timings memt;
};

/* regular resolution database*/
static struct {
	char name[16];
	struct pm3fb_par user_mode;
} mode_base[] __initdata = {
	{
		"default-800x600", {
	49500, 800, 600, 16, 96, 256, 1056, 1, 4, 25, 625,
			    800, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_HIGH
			    |
			    PM3VideoControl_VSYNC_ACTIVE_HIGH
			    | PM3VideoControl_PIXELSIZE_8BIT}}, {
		"1024x768-74", {
	78752, 1024, 768, 32, 128, 304, 1328, 1, 4, 38,
			    806, 1024, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_HIGH
			    |
			    PM3VideoControl_VSYNC_ACTIVE_HIGH
			    | PM3VideoControl_PIXELSIZE_8BIT}}, {
		"1024x768-74-32", {
			78752, 1024, 768, 32, 128, 304, 1328, 1, 4, 38,
			806, 1024, 0, 32,
			PM3VideoControl_ENABLE |
			PM3VideoControl_HSYNC_ACTIVE_HIGH
			|
			PM3VideoControl_VSYNC_ACTIVE_HIGH
			| PM3VideoControl_PIXELSIZE_32BIT}},
/* Generated mode : "1600x1024", for the SGI 1600SW flat panel*/
	{
		"SGI1600SW", {
			108000, 1600, 1024, 16, 56, 104, 1704, 3, 6, 32,
			1056, 1600, 0, 8,
			PM3VideoControl_ENABLE|
			PM3VideoControl_HSYNC_ACTIVE_LOW|PM3VideoControl_VSYNC_ACTIVE_LOW|
			PM3VideoControl_PIXELSIZE_32BIT}}, 
/* ##### auto-generated mode, by fbtimings2pm3 */
/* Generated mode : "640x480-60" */
	{
		"640x480-60", {
	25174, 640, 480, 16, 112, 160, 800, 10, 12, 45,
			    525, 640, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_LOW
			    |
			    PM3VideoControl_VSYNC_ACTIVE_LOW
			    | PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "640x480-72" */
	{
		"640x480-72", {
	31199, 640, 480, 24, 64, 192, 832, 9, 12, 40, 520,
			    640, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_LOW
			    |
			    PM3VideoControl_VSYNC_ACTIVE_LOW
			    | PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "640x480-75" */
	{
		"640x480-75", {
	31499, 640, 480, 16, 80, 200, 840, 1, 4, 20, 500,
			    640, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_LOW
			    |
			    PM3VideoControl_VSYNC_ACTIVE_LOW
			    | PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "640x480-90" */
	{
		"640x480-90", {
	39909, 640, 480, 32, 72, 192, 832, 25, 39, 53, 533,
			    640, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_LOW
			    |
			    PM3VideoControl_VSYNC_ACTIVE_LOW
			    | PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "640x480-100" */
	{
		"640x480-100", {
	44899, 640, 480, 32, 160, 208, 848, 22, 34, 51,
			    531, 640, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_LOW
			    |
			    PM3VideoControl_VSYNC_ACTIVE_LOW
			    | PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "800x600-48-lace" */
/* INTERLACED NOT SUPPORTED
  {"800x600-48-lace", {35999, 800, 600, 80, 208, 264, 1064, 11, 23, 102, 702, 800, 0, 8, PM3VideoControl_ENABLE|PM3VideoControl_HSYNC_ACTIVE_HIGH|PM3VideoControl_VSYNC_ACTIVE_HIGH|PM3VideoControl_PIXELSIZE_8BIT}}, 
   INTERLACED NOT SUPPORTED */
/* Generated mode : "800x600-56" */
	{
		"800x600-56", {
	35999, 800, 600, 24, 96, 224, 1024, 1, 3, 25, 625,
			    800, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_HIGH
			    |
			    PM3VideoControl_VSYNC_ACTIVE_HIGH
			    | PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "800x600-60" */
	{
		"800x600-60", {
	40000, 800, 600, 40, 168, 256, 1056, 1, 5, 28, 628,
			    800, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_HIGH
			    |
			    PM3VideoControl_VSYNC_ACTIVE_HIGH
			    | PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "800x600-70" */
	{
		"800x600-70", {
	44899, 800, 600, 24, 168, 208, 1008, 9, 21, 36,
			    636, 800, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_HIGH
			    |
			    PM3VideoControl_VSYNC_ACTIVE_LOW
			    | PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "800x600-72" */
	{
		"800x600-72", {
	50000, 800, 600, 56, 176, 240, 1040, 37, 43, 66,
			    666, 800, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_HIGH
			    |
			    PM3VideoControl_VSYNC_ACTIVE_HIGH
			    | PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "800x600-75" */
	{
		"800x600-75", {
	49497, 800, 600, 16, 96, 256, 1056, 1, 4, 25, 625,
			    800, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_HIGH
			    |
			    PM3VideoControl_VSYNC_ACTIVE_HIGH
			    | PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "800x600-90" */
	{
		"800x600-90", {
	56637, 800, 600, 8, 72, 192, 992, 8, 19, 35, 635,
			    800, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_HIGH
			    |
			    PM3VideoControl_VSYNC_ACTIVE_HIGH
			    | PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "800x600-100", from /etc/fb.modes */
/* DISABLED, hsstart == 0
	{
		"800x600-100", {
	67499, 800, 600, 0, 64, 280, 1080, 7, 11, 25, 625,
			    800, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_HIGH
			    |
			    PM3VideoControl_VSYNC_ACTIVE_HIGH
			    | PM3VideoControl_PIXELSIZE_8BIT}},
*/
/* Generated mode : "800x600-100", from ??? */
	{
		"800x600-100", {
			69650, 800, 600, 64, 128, 288, 1088, 4, 10, 40, 640, 800, 0, 8,
			PM3VideoControl_ENABLE|PM3VideoControl_HSYNC_ACTIVE_LOW|
			PM3VideoControl_VSYNC_ACTIVE_LOW|PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "1024x768-43-lace" */
/* INTERLACED NOT SUPPORTED
  {"1024x768-43-lace", {44899, 1024, 768, 8, 184, 240, 1264, 1, 9, 49, 817, 1024, 0, 8, PM3VideoControl_ENABLE|PM3VideoControl_HSYNC_ACTIVE_HIGH|PM3VideoControl_VSYNC_ACTIVE_HIGH|PM3VideoControl_PIXELSIZE_8BIT}}, 
   INTERLACED NOT SUPPORTED */
/* Generated mode : "1024x768-60" */
	{
		"1024x768-60", {
	64998, 1024, 768, 24, 160, 320, 1344, 3, 9, 38,
			    806, 1024, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_LOW
			    |
			    PM3VideoControl_VSYNC_ACTIVE_LOW
			    | PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "1024x768-70" */
	{
		"1024x768-70", {
	74996, 1024, 768, 24, 160, 304, 1328, 3, 9, 38,
			    806, 1024, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_LOW
			    |
			    PM3VideoControl_VSYNC_ACTIVE_LOW
			    | PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "1024x768-72" */
	{
		"1024x768-72", {
	74996, 10224, 768, 24, 160, 264, 10488, 3, 9, 38,
			    806, 10224, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_LOW
			    |
			    PM3VideoControl_VSYNC_ACTIVE_LOW
			    | PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "1024x768-75" */
	{
		"1024x768-75", {
	78746, 1024, 768, 16, 112, 288, 1312, 1, 4, 32,
			    800, 1024, 0, 8,
			    PM3VideoControl_ENABLE |
			    PM3VideoControl_HSYNC_ACTIVE_HIGH
			    |
			    PM3VideoControl_VSYNC_ACTIVE_HIGH
			    | PM3VideoControl_PIXELSIZE_8BIT}},
/* Generated mode : "1024x768-90" */