projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| f30c2269 | 2 | * linux/arch/sh/boards/renesas/rts7751r2d/led.c |
| 1da177e4 LT |
3 | * |
| 4 | * Copyright (C) Atom Create Engineering Co., Ltd. | |
| 5 | * | |
| 6 | * May be copied or modified under the terms of GNU General Public | |
| 7 | * License. See linux/COPYING for more information. | |
| 8 | * | |
| 9 | * This file contains Renesas Technology Sales RTS7751R2D specific LED code. | |
| 10 | */ | |
| 11 | ||
| 1da177e4 LT |
12 | #include <asm/io.h> |
| 13 | #include <asm/rts7751r2d/rts7751r2d.h> | |
| 14 | ||
| 1da177e4 LT |
15 | #ifdef CONFIG_HEARTBEAT |
| 16 | ||
| 17 | #include <linux/sched.h> | |
| 18 | ||
| 19 | /* Cycle the LED's in the clasic Knightriger/Sun pattern */ | |
| 20 | void heartbeat_rts7751r2d(void) | |
| 21 | { | |
| 22 | static unsigned int cnt = 0, period = 0; | |
| 23 | volatile unsigned short *p = (volatile unsigned short *)PA_OUTPORT; | |
| 24 | static unsigned bit = 0, up = 1; | |
| 25 | ||
| 26 | cnt += 1; | |
| 27 | if (cnt < period) | |
| 28 | return; | |
| 29 | ||
| 30 | cnt = 0; | |
| 31 | ||
| 32 | /* Go through the points (roughly!): | |
| 33 | * f(0)=10, f(1)=16, f(2)=20, f(5)=35, f(int)->110 | |
| 34 | */ | |
| 35 | period = 110 - ((300 << FSHIFT)/((avenrun[0]/5) + (3<<FSHIFT))); | |
| 36 | ||
| 37 | *p = 1 << bit; | |
| 38 | if (up) | |
| 39 | if (bit == 7) { | |
| 40 | bit--; | |
| 41 | up = 0; | |
| 42 | } else | |
| 43 | bit++; | |
| 44 | else if (bit == 0) | |
| 45 | up = 1; | |
| 46 | else | |
| 47 | bit--; | |
| 48 | } | |
| 49 | #endif /* CONFIG_HEARTBEAT */ | |
| 50 | ||
| 51 | void rts7751r2d_led(unsigned short value) | |
| 52 | { | |
| 53 | ctrl_outw(value, PA_OUTPORT); | |
| 54 | } | |
| 55 |