2 * linux/drivers/video/bt455.h
4 * Copyright 2003 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>
6 * This file is subject to the terms and conditions of the GNU General
7 * Public License. See the file COPYING in the main directory of this
8 * archive for more details.
10 #include <linux/types.h>
11 #include <asm/system.h>
14 * Bt455 byte-wide registers, 32-bit aligned.
17 volatile u8 addr_cmap
;
19 volatile u8 addr_cmap_data
;
23 volatile u8 addr_ovly
;
27 static inline void bt455_select_reg(struct bt455_regs
*regs
, int ir
)
30 regs
->addr_cmap
= ir
& 0x0f;
34 * Read/write to a Bt455 color map register.
36 static inline void bt455_read_cmap_entry(struct bt455_regs
*regs
, int cr
,
37 u8
* red
, u8
* green
, u8
* blue
)
39 bt455_select_reg(regs
, cr
);
41 *red
= regs
->addr_cmap_data
& 0x0f;
43 *green
= regs
->addr_cmap_data
& 0x0f;
45 *blue
= regs
->addr_cmap_data
& 0x0f;
48 static inline void bt455_write_cmap_entry(struct bt455_regs
*regs
, int cr
,
49 u8 red
, u8 green
, u8 blue
)
51 bt455_select_reg(regs
, cr
);
53 regs
->addr_cmap_data
= red
& 0x0f;
55 regs
->addr_cmap_data
= green
& 0x0f;
57 regs
->addr_cmap_data
= blue
& 0x0f;
60 static inline void bt455_write_ovly_entry(struct bt455_regs
*regs
, int cr
,
61 u8 red
, u8 green
, u8 blue
)
63 bt455_select_reg(regs
, cr
);
65 regs
->addr_ovly
= red
& 0x0f;
67 regs
->addr_ovly
= green
& 0x0f;
69 regs
->addr_ovly
= blue
& 0x0f;
72 static inline void bt455_set_cursor(struct bt455_regs
*regs
)
75 regs
->addr_ovly
= 0x0f;
77 regs
->addr_ovly
= 0x0f;
79 regs
->addr_ovly
= 0x0f;
82 static inline void bt455_erase_cursor(struct bt455_regs
*regs
)
84 /* bt455_write_cmap_entry(regs, 8, 0x00, 0x00, 0x00); */
85 /* bt455_write_cmap_entry(regs, 9, 0x00, 0x00, 0x00); */
86 bt455_write_ovly_entry(regs
, 8, 0x03, 0x03, 0x03);
87 bt455_write_ovly_entry(regs
, 9, 0x07, 0x07, 0x07);
90 regs
->addr_ovly
= 0x09;
92 regs
->addr_ovly
= 0x09;
94 regs
->addr_ovly
= 0x09;
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