2 * [origin: Linux kernel include/asm-arm/arch-at91/at91_pit.h]
4 * Copyright (C) 2007 Andrew Victor
5 * Copyright (C) 2007 Atmel Corporation.
7 * Periodic Interval Timer (PIT) - System peripherals regsters.
8 * Based on AT91SAM9261 datasheet revision D.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
19 typedef struct at91_pit {
20 u32 mr; /* 0x00 Mode Register */
21 u32 sr; /* 0x04 Status Register */
22 u32 pivr; /* 0x08 Periodic Interval Value Register */
23 u32 piir; /* 0x0C Periodic Interval Image Register */
26 #define AT91_PIT_MR_IEN 0x02000000
27 #define AT91_PIT_MR_EN 0x01000000
28 #define AT91_PIT_MR_PIV_MASK(x) (x & 0x000fffff)
29 #define AT91_PIT_MR_PIV(x) (x & AT91_PIT_MR_PIV_MASK)
31 #ifdef CONFIG_AT91_LEGACY
33 #define AT91_PIT_MR (AT91_PIT + 0x00) /* Mode Register */
34 #define AT91_PIT_PITIEN (1 << 25) /* Timer Interrupt Enable */
35 #define AT91_PIT_PITEN (1 << 24) /* Timer Enabled */
36 #define AT91_PIT_PIV (0xfffff) /* Periodic Interval Value */
38 #define AT91_PIT_SR (AT91_PIT + 0x04) /* Status Register */
39 #define AT91_PIT_PITS (1 << 0) /* Timer Status */
41 #define AT91_PIT_PIVR (AT91_PIT + 0x08) /* Periodic Interval Value Register */
42 #define AT91_PIT_PIIR (AT91_PIT + 0x0c) /* Periodic Interval Image Register */
43 #define AT91_PIT_PICNT (0xfff << 20) /* Interval Counter */
44 #define AT91_PIT_CPIV (0xfffff) /* Inverval Value */
46 #endif /* CONFIG_AT91_LEGACY */