projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * linux/drivers/video/bt455.h | |
| 3 | * | |
| 4 | * Copyright 2003 Thiemo Seufer <[email protected]> | |
| 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> | |
| 1da177e4 LT |
11 | |
| 12 | /* | |
| 13 | * Bt455 byte-wide registers, 32-bit aligned. | |
| 14 | */ | |
| 15 | struct bt455_regs { | |
| 16 | volatile u8 addr_cmap; | |
| 17 | u8 pad0[3]; | |
| 18 | volatile u8 addr_cmap_data; | |
| 19 | u8 pad1[3]; | |
| 20 | volatile u8 addr_clr; | |
| 21 | u8 pad2[3]; | |
| 22 | volatile u8 addr_ovly; | |
| 23 | u8 pad3[3]; | |
| 24 | }; | |
| 25 | ||
| 26 | static inline void bt455_select_reg(struct bt455_regs *regs, int ir) | |
| 27 | { | |
| 28 | mb(); | |
| 29 | regs->addr_cmap = ir & 0x0f; | |
| 30 | } | |
| 31 | ||
| 32 | /* | |
| 33 | * Read/write to a Bt455 color map register. | |
| 34 | */ | |
| 35 | static inline void bt455_read_cmap_entry(struct bt455_regs *regs, int cr, | |
| 36 | u8* red, u8* green, u8* blue) | |
| 37 | { | |
| 38 | bt455_select_reg(regs, cr); | |
| 39 | mb(); | |
| 40 | *red = regs->addr_cmap_data & 0x0f; | |
| 41 | rmb(); | |
| 42 | *green = regs->addr_cmap_data & 0x0f; | |
| 43 | rmb(); | |
| 44 | *blue = regs->addr_cmap_data & 0x0f; | |
| 45 | } | |
| 46 | ||
| 47 | static inline void bt455_write_cmap_entry(struct bt455_regs *regs, int cr, | |
| 48 | u8 red, u8 green, u8 blue) | |
| 49 | { | |
| 50 | bt455_select_reg(regs, cr); | |
| 51 | wmb(); | |
| 52 | regs->addr_cmap_data = red & 0x0f; | |
| 53 | wmb(); | |
| 54 | regs->addr_cmap_data = green & 0x0f; | |
| 55 | wmb(); | |
| 56 | regs->addr_cmap_data = blue & 0x0f; | |
| 57 | } | |
| 58 | ||
| 59 | static inline void bt455_write_ovly_entry(struct bt455_regs *regs, int cr, | |
| 60 | u8 red, u8 green, u8 blue) | |
| 61 | { | |
| 62 | bt455_select_reg(regs, cr); | |
| 63 | wmb(); | |
| 64 | regs->addr_ovly = red & 0x0f; | |
| 65 | wmb(); | |
| 66 | regs->addr_ovly = green & 0x0f; | |
| 67 | wmb(); | |
| 68 | regs->addr_ovly = blue & 0x0f; | |
| 69 | } | |
| 70 | ||
| 71 | static inline void bt455_set_cursor(struct bt455_regs *regs) | |
| 72 | { | |
| 73 | mb(); | |
| 74 | regs->addr_ovly = 0x0f; | |
| 75 | wmb(); | |
| 76 | regs->addr_ovly = 0x0f; | |
| 77 | wmb(); | |
| 78 | regs->addr_ovly = 0x0f; | |
| 79 | } | |
| 80 | ||
| 81 | static inline void bt455_erase_cursor(struct bt455_regs *regs) | |
| 82 | { | |
| 83 | /* bt455_write_cmap_entry(regs, 8, 0x00, 0x00, 0x00); */ | |
| 84 | /* bt455_write_cmap_entry(regs, 9, 0x00, 0x00, 0x00); */ | |
| 85 | bt455_write_ovly_entry(regs, 8, 0x03, 0x03, 0x03); | |
| 86 | bt455_write_ovly_entry(regs, 9, 0x07, 0x07, 0x07); | |
| 87 | ||
| 88 | wmb(); | |
| 89 | regs->addr_ovly = 0x09; | |
| 90 | wmb(); | |
| 91 | regs->addr_ovly = 0x09; | |
| 92 | wmb(); | |
| 93 | regs->addr_ovly = 0x09; | |
| 94 | } |