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/*
 *
 * Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200, G400 and G450
 *
 * (c) 1998-2002 Petr Vandrovec <vandrove@vc.cvut.cz>
 *
 */
#ifndef __MATROXFB_H__
#define __MATROXFB_H__

/* general, but fairly heavy, debugging */
#undef MATROXFB_DEBUG

/* heavy debugging: */
/* -- logs putc[s], so every time a char is displayed, it's logged */
#undef MATROXFB_DEBUG_HEAVY

/* This one _could_ cause infinite loops */
/* It _does_ cause lots and lots of messages during idle loops */
#undef MATROXFB_DEBUG_LOOP

/* Debug register calls, too? */
#undef MATROXFB_DEBUG_REG

/* Guard accelerator accesses with spin_lock_irqsave... */
#undef MATROXFB_USE_SPINLOCKS

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/console.h>
#include <linux/selection.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/kd.h>

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

#if defined(CONFIG_PPC_PMAC)
#include <asm/prom.h>
#include <asm/pci-bridge.h>
#include "../macmodes.h"
#endif

#ifdef MATROXFB_DEBUG

#define DEBUG
#define DBG(x)		printk(KERN_DEBUG "matroxfb: %s\n", (x));

#ifdef MATROXFB_DEBUG_HEAVY
#define DBG_HEAVY(x)	DBG(x)
#else /* MATROXFB_DEBUG_HEAVY */
#define DBG_HEAVY(x)	/* DBG_HEAVY */
#endif /* MATROXFB_DEBUG_HEAVY */

#ifdef MATROXFB_DEBUG_LOOP
#define DBG_LOOP(x)	DBG(x)
#else /* MATROXFB_DEBUG_LOOP */
#define DBG_LOOP(x)	/* DBG_LOOP */
#endif /* MATROXFB_DEBUG_LOOP */

#ifdef MATROXFB_DEBUG_REG
#define DBG_REG(x)	DBG(x)
#else /* MATROXFB_DEBUG_REG */
#define DBG_REG(x)	/* DBG_REG */
#endif /* MATROXFB_DEBUG_REG */

#else /* MATROXFB_DEBUG */

#define DBG(x)		/* DBG */
#define DBG_HEAVY(x)	/* DBG_HEAVY */
#define DBG_REG(x)	/* DBG_REG */
#define DBG_LOOP(x)	/* DBG_LOOP */

#endif /* MATROXFB_DEBUG */

#ifdef DEBUG
#define dprintk(X...)	printk(X)
#else
#define dprintk(X...)
#endif

#ifndef PCI_SS_VENDOR_ID_SIEMENS_NIXDORF
#define PCI_SS_VENDOR_ID_SIEMENS_NIXDORF	0x110A
#endif
#ifndef PCI_SS_VENDOR_ID_MATROX
#define PCI_SS_VENDOR_ID_MATROX		PCI_VENDOR_ID_MATROX
#endif

#ifndef PCI_SS_ID_MATROX_PRODUCTIVA_G100_AGP
#define PCI_SS_ID_MATROX_GENERIC		0xFF00
#define PCI_SS_ID_MATROX_PRODUCTIVA_G100_AGP	0xFF01
#define PCI_SS_ID_MATROX_MYSTIQUE_G200_AGP	0xFF02
#define PCI_SS_ID_MATROX_MILLENIUM_G200_AGP	0xFF03
#define PCI_SS_ID_MATROX_MARVEL_G200_AGP	0xFF04
#define PCI_SS_ID_MATROX_MGA_G100_PCI		0xFF05
#define PCI_SS_ID_MATROX_MGA_G100_AGP		0x1001
#define PCI_SS_ID_MATROX_MILLENNIUM_G400_MAX_AGP	0x2179
#define PCI_SS_ID_SIEMENS_MGA_G100_AGP		0x001E /* 30 */
#define PCI_SS_ID_SIEMENS_MGA_G200_AGP		0x0032 /* 50 */
#endif

#define MX_VISUAL_TRUECOLOR	FB_VISUAL_DIRECTCOLOR
#define MX_VISUAL_DIRECTCOLOR	FB_VISUAL_TRUECOLOR
#define MX_VISUAL_PSEUDOCOLOR	FB_VISUAL_PSEUDOCOLOR

#define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)

/* G-series and Mystique have (almost) same DAC */
#undef NEED_DAC1064
#if defined(CONFIG_FB_MATROX_MYSTIQUE) || defined(CONFIG_FB_MATROX_G)
#define NEED_DAC1064 1
#endif

typedef struct {
	void __iomem*	vaddr;
} vaddr_t;

static inline unsigned int mga_readb(vaddr_t va, unsigned int offs) {
	return readb(va.vaddr + offs);
}

static inline void mga_writeb(vaddr_t va, unsigned int offs, u_int8_t value) {
	writeb(value, va.vaddr + offs);
}

static inline void mga_writew(vaddr_t va, unsigned int offs, u_int16_t value) {
	writew(value, va.vaddr + offs);
}

static inline u_int32_t mga_readl(vaddr_t va, unsigned int offs) {
	return readl(va.vaddr + offs);
}

static inline void mga_writel(vaddr_t va, unsigned int offs, u_int32_t value) {
	writel(value, va.vaddr + offs);
}

static inline void mga_memcpy_toio(vaddr_t va, const void* src, int len) {
#if defined(__alpha__) || defined(__i386__) || defined(__x86_64__)
	/*
	 * iowrite32_rep works for us if:
	 *  (1) Copies data as 32bit quantities, not byte after byte,
	 *  (2) Performs LE ordered stores, and
	 *  (3) It copes with unaligned source (destination is guaranteed to be page
	 *      aligned and length is guaranteed to be multiple of 4).
	 */
	iowrite32_rep(va.vaddr, src, len >> 2);
#else
        u_int32_t __iomem* addr = va.vaddr;

	if ((unsigned long)src & 3) {
		while (len >= 4) {
			fb_writel(get_unaligned((u32 *)src), addr);
			addr++;
			len -= 4;
			src += 4;
		}
	} else {
		while (len >= 4) {
			fb_writel(*(u32 *)src, addr);
			addr++;
			len -= 4;
			src += 4;
		}
	}
#endif
}

static inline void vaddr_add(vaddr_t* va, unsigned long offs) {
	va->vaddr += offs;
}

static inline void __iomem* vaddr_va(vaddr_t va) {
	return va.vaddr;
}

struct my_timming {
	unsigned int pixclock;
	int mnp;
	unsigned int crtc;
	unsigned int HDisplay;
	unsigned int HSyncStart;
	unsigned int HSyncEnd;
	unsigned int HTotal;
	unsigned int VDisplay;
	unsigned int VSyncStart;
	unsigned int VSyncEnd;
	unsigned int VTotal;
	unsigned int sync;
	int	     dblscan;
	int	     interlaced;
	unsigned int delay;	/* CRTC delay */
};

enum { M_SYSTEM_PLL, M_PIXEL_PLL_A, M_PIXEL_PLL_B, M_PIXEL_PLL_C, M_VIDEO_PLL };

struct matrox_pll_cache {
	unsigned int	valid;
	struct {
		unsigned int	mnp_key;
		unsigned int	mnp_value;
		      } data[4];
};

struct matrox_pll_limits {
	unsigned int	vcomin;
	unsigned int	vcomax;
};

struct matrox_pll_features {
	unsigned int	vco_freq_min;
	unsigned int	ref_freq;
	unsigned int	feed_div_min;
	unsigned int	feed_div_max;
	unsigned int	in_div_min;
	unsigned int	in_div_max;
	unsigned int	post_shift_max;
};

struct matroxfb_par
{
	unsigned int	final_bppShift;
	unsigned int	cmap_len;
	struct {
		unsigned int bytes;
		unsigned int pixels;
		unsigned int chunks;
		      } ydstorg;
};

struct matrox_fb_info;

struct matrox_DAC1064_features {
	u_int8_t	xvrefctrl;
	u_int8_t	xmiscctrl;
};

/* current hardware status */
struct mavenregs {
	u_int8_t regs[256];
	int	 mode;
	int	 vlines;
	int	 xtal;
	int	 fv;

	u_int16_t htotal;
	u_int16_t hcorr;
};

struct matrox_crtc2 {
	u_int32_t ctl;
};

struct matrox_hw_state {
	u_int32_t	MXoptionReg;
	unsigned char	DACclk[6];
	unsigned char	DACreg[80];
	unsigned char	MiscOutReg;
	unsigned char	DACpal[768];
	unsigned char	CRTC[25];
	unsigned char	CRTCEXT[9];
	unsigned char	SEQ[5];
	/* unused for MGA mode, but who knows... */
	unsigned char	GCTL[9];
	/* unused for MGA mode, but who knows... */
	unsigned char	ATTR[21];

	/* TVOut only */
	struct mavenregs	maven;

	struct matrox_crtc2	crtc2;
};

struct matrox_accel_data {
#ifdef CONFIG_FB_MATROX_MILLENIUM
	unsigned char	ramdac_rev;
#endif