projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Hardware parameter area specific to Sharp SL series devices | |
| 3 | * | |
| 4 | * Copyright (c) 2005 Richard Purdie | |
| 5 | * | |
| 6 | * Based on Sharp's 2.4 kernel patches | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | * | |
| 12 | */ | |
| 13 | ||
| 14 | #include <linux/kernel.h> | |
| ec36b16d | 15 | #include <linux/module.h> |
| 1da177e4 LT |
16 | #include <linux/string.h> |
| 17 | #include <asm/mach/sharpsl_param.h> | |
| 85633728 | 18 | #include <asm/memory.h> |
| 1da177e4 LT |
19 | |
| 20 | /* | |
| 21 | * Certain hardware parameters determined at the time of device manufacture, | |
| 22 | * typically including LCD parameters are loaded by the bootloader at the | |
| 23 | * address PARAM_BASE. As the kernel will overwrite them, we need to store | |
| 24 | * them early in the boot process, then pass them to the appropriate drivers. | |
| 6cbdc8c5 | 25 | * Not all devices use all parameters but the format is common to all. |
| 1da177e4 | 26 | */ |
| d67947a1 | 27 | #ifdef CONFIG_ARCH_SA1100 |
| 1da177e4 | 28 | #define PARAM_BASE 0xe8ffc000 |
| 85633728 | 29 | #define param_start(x) (void *)(x) |
| 1da177e4 LT |
30 | #else |
| 31 | #define PARAM_BASE 0xa0000a00 | |
| 85633728 | 32 | #define param_start(x) __va(x) |
| 1da177e4 LT |
33 | #endif |
| 34 | #define MAGIC_CHG(a,b,c,d) ( ( d << 24 ) | ( c << 16 ) | ( b << 8 ) | a ) | |
| 35 | ||
| 36 | #define COMADJ_MAGIC MAGIC_CHG('C','M','A','D') | |
| 37 | #define UUID_MAGIC MAGIC_CHG('U','U','I','D') | |
| 38 | #define TOUCH_MAGIC MAGIC_CHG('T','U','C','H') | |
| 39 | #define AD_MAGIC MAGIC_CHG('B','V','A','D') | |
| 40 | #define PHAD_MAGIC MAGIC_CHG('P','H','A','D') | |
| 41 | ||
| 42 | struct sharpsl_param_info sharpsl_param; | |
| ec36b16d | 43 | EXPORT_SYMBOL(sharpsl_param); |
| 1da177e4 LT |
44 | |
| 45 | void sharpsl_save_param(void) | |
| 46 | { | |
| 85633728 | 47 | memcpy(&sharpsl_param, param_start(PARAM_BASE), sizeof(struct sharpsl_param_info)); |
| 1da177e4 LT |
48 | |
| 49 | if (sharpsl_param.comadj_keyword != COMADJ_MAGIC) | |
| 50 | sharpsl_param.comadj=-1; | |
| 51 | ||
| 52 | if (sharpsl_param.phad_keyword != PHAD_MAGIC) | |
| 53 | sharpsl_param.phadadj=-1; | |
| 54 | ||
| 55 | if (sharpsl_param.uuid_keyword != UUID_MAGIC) | |
| 56 | sharpsl_param.uuid[0]=-1; | |
| 57 | ||
| 58 | if (sharpsl_param.touch_keyword != TOUCH_MAGIC) | |
| 59 | sharpsl_param.touch_xp=-1; | |
| 60 | ||
| 61 | if (sharpsl_param.adadj_keyword != AD_MAGIC) | |
| 62 | sharpsl_param.adadj=-1; | |
| 63 | } | |
| 64 | ||
| 65 |