Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/drivers/video/bt455.h | |
3 | * | |
4 | * Copyright 2003 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de> | |
5 | * | |
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. | |
9 | */ | |
10 | #include <linux/types.h> | |
11 | #include <asm/system.h> | |
12 | ||
13 | /* | |
14 | * Bt455 byte-wide registers, 32-bit aligned. | |
15 | */ | |
16 | struct bt455_regs { | |
17 | volatile u8 addr_cmap; | |
18 | u8 pad0[3]; | |
19 | volatile u8 addr_cmap_data; | |
20 | u8 pad1[3]; | |
21 | volatile u8 addr_clr; | |
22 | u8 pad2[3]; | |
23 | volatile u8 addr_ovly; | |
24 | u8 pad3[3]; | |
25 | }; | |
26 | ||
27 | static inline void bt455_select_reg(struct bt455_regs *regs, int ir) | |
28 | { | |
29 | mb(); | |
30 | regs->addr_cmap = ir & 0x0f; | |
31 | } | |
32 | ||
33 | /* | |
34 | * Read/write to a Bt455 color map register. | |
35 | */ | |
36 | static inline void bt455_read_cmap_entry(struct bt455_regs *regs, int cr, | |
37 | u8* red, u8* green, u8* blue) | |
38 | { | |
39 | bt455_select_reg(regs, cr); | |
40 | mb(); | |
41 | *red = regs->addr_cmap_data & 0x0f; | |
42 | rmb(); | |
43 | *green = regs->addr_cmap_data & 0x0f; | |
44 | rmb(); | |
45 | *blue = regs->addr_cmap_data & 0x0f; | |
46 | } | |
47 | ||
48 | static inline void bt455_write_cmap_entry(struct bt455_regs *regs, int cr, | |
49 | u8 red, u8 green, u8 blue) | |
50 | { | |
51 | bt455_select_reg(regs, cr); | |
52 | wmb(); | |
53 | regs->addr_cmap_data = red & 0x0f; | |
54 | wmb(); | |
55 | regs->addr_cmap_data = green & 0x0f; | |
56 | wmb(); | |
57 | regs->addr_cmap_data = blue & 0x0f; | |
58 | } | |
59 | ||
60 | static inline void bt455_write_ovly_entry(struct bt455_regs *regs, int cr, | |
61 | u8 red, u8 green, u8 blue) | |
62 | { | |
63 | bt455_select_reg(regs, cr); | |
64 | wmb(); | |
65 | regs->addr_ovly = red & 0x0f; | |
66 | wmb(); | |
67 | regs->addr_ovly = green & 0x0f; | |
68 | wmb(); | |
69 | regs->addr_ovly = blue & 0x0f; | |
70 | } | |
71 | ||
72 | static inline void bt455_set_cursor(struct bt455_regs *regs) | |
73 | { | |
74 | mb(); | |
75 | regs->addr_ovly = 0x0f; | |
76 | wmb(); | |
77 | regs->addr_ovly = 0x0f; | |
78 | wmb(); | |
79 | regs->addr_ovly = 0x0f; | |
80 | } | |
81 | ||
82 | static inline void bt455_erase_cursor(struct bt455_regs *regs) | |
83 | { | |
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); | |
88 | ||
89 | wmb(); | |
90 | regs->addr_ovly = 0x09; | |
91 | wmb(); | |
92 | regs->addr_ovly = 0x09; | |
93 | wmb(); | |
94 | regs->addr_ovly = 0x09; | |
95 | } |