/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __RIVAFB_H
#define __RIVAFB_H

#include <linux/fb.h>
#include <video/vga.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>

#include "riva_hw.h"

/* GGI compatibility macros */
#define NUM_SEQ_REGS            0x05
#define NUM_CRT_REGS            0x41
#define NUM_GRC_REGS            0x09
#define NUM_ATC_REGS            0x15

/* I2C */
#define DDC_SCL_READ_MASK       (1 << 2)
#define DDC_SCL_WRITE_MASK      (1 << 5)
#define DDC_SDA_READ_MASK       (1 << 3)
#define DDC_SDA_WRITE_MASK      (1 << 4)

/* holds the state of the VGA core and extended Riva hw state from riva_hw.c.
 * From KGI originally. */
struct riva_regs {
        u8 attr[NUM_ATC_REGS];
        u8 crtc[NUM_CRT_REGS];
        u8 gra[NUM_GRC_REGS];
        u8 seq[NUM_SEQ_REGS];
        u8 misc_output;
        RIVA_HW_STATE ext;
};

struct riva_par;

struct riva_i2c_chan {
        struct riva_par *par;
        unsigned long   ddc_base;
        struct i2c_adapter adapter;
        struct i2c_algo_bit_data algo;
};

struct riva_par {
        RIVA_HW_INST riva;      /* interface to riva_hw.c */
        u32 pseudo_palette[16]; /* default palette */
        u32 palette[16];        /* for Riva128 */
        u8 __iomem *ctrl_base;  /* virtual control register base addr */
        unsigned dclk_max;      /* max DCLK */

        struct riva_regs initial_state; /* initial startup video mode */
        struct riva_regs current_state;
#ifdef CONFIG_X86
        struct vgastate state;
#endif
        struct mutex open_lock;
        unsigned int ref_count;
        unsigned char *EDID;
        unsigned int Chipset;
        int forceCRTC;
        Bool SecondCRTC;
        int FlatPanel;
        struct pci_dev *pdev;
        int cursor_reset;
        int wc_cookie;
        struct riva_i2c_chan chan[3];
};

void riva_common_setup(struct riva_par *);
unsigned long riva_get_memlen(struct riva_par *);
unsigned long riva_get_maxdclk(struct riva_par *);
void riva_delete_i2c_busses(struct riva_par *par);
void riva_create_i2c_busses(struct riva_par *par);
int riva_probe_i2c_connector(struct riva_par *par, int conn, u8 **out_edid);

#endif /* __RIVAFB_H */