xref: /openbmc/linux/drivers/video/fbdev/riva/rivafb.h (revision b2441318)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __RIVAFB_H
3 #define __RIVAFB_H
4 
5 #include <linux/fb.h>
6 #include <video/vga.h>
7 #include <linux/i2c.h>
8 #include <linux/i2c-algo-bit.h>
9 
10 #include "riva_hw.h"
11 
12 /* GGI compatibility macros */
13 #define NUM_SEQ_REGS		0x05
14 #define NUM_CRT_REGS		0x41
15 #define NUM_GRC_REGS		0x09
16 #define NUM_ATC_REGS		0x15
17 
18 /* I2C */
19 #define DDC_SCL_READ_MASK       (1 << 2)
20 #define DDC_SCL_WRITE_MASK      (1 << 5)
21 #define DDC_SDA_READ_MASK       (1 << 3)
22 #define DDC_SDA_WRITE_MASK      (1 << 4)
23 
24 /* holds the state of the VGA core and extended Riva hw state from riva_hw.c.
25  * From KGI originally. */
26 struct riva_regs {
27 	u8 attr[NUM_ATC_REGS];
28 	u8 crtc[NUM_CRT_REGS];
29 	u8 gra[NUM_GRC_REGS];
30 	u8 seq[NUM_SEQ_REGS];
31 	u8 misc_output;
32 	RIVA_HW_STATE ext;
33 };
34 
35 struct riva_par;
36 
37 struct riva_i2c_chan {
38 	struct riva_par *par;
39 	unsigned long   ddc_base;
40 	struct i2c_adapter adapter;
41 	struct i2c_algo_bit_data algo;
42 };
43 
44 struct riva_par {
45 	RIVA_HW_INST riva;	/* interface to riva_hw.c */
46 	u32 pseudo_palette[16]; /* default palette */
47 	u32 palette[16];        /* for Riva128 */
48 	u8 __iomem *ctrl_base;	/* virtual control register base addr */
49 	unsigned dclk_max;	/* max DCLK */
50 
51 	struct riva_regs initial_state;	/* initial startup video mode */
52 	struct riva_regs current_state;
53 #ifdef CONFIG_X86
54 	struct vgastate state;
55 #endif
56 	struct mutex open_lock;
57 	unsigned int ref_count;
58 	unsigned char *EDID;
59 	unsigned int Chipset;
60 	int forceCRTC;
61 	Bool SecondCRTC;
62 	int FlatPanel;
63 	struct pci_dev *pdev;
64 	int cursor_reset;
65 	int wc_cookie;
66 	struct riva_i2c_chan chan[3];
67 };
68 
69 void riva_common_setup(struct riva_par *);
70 unsigned long riva_get_memlen(struct riva_par *);
71 unsigned long riva_get_maxdclk(struct riva_par *);
72 void riva_delete_i2c_busses(struct riva_par *par);
73 void riva_create_i2c_busses(struct riva_par *par);
74 int riva_probe_i2c_connector(struct riva_par *par, int conn, u8 **out_edid);
75 
76 #endif /* __RIVAFB_H */
77