projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| f30c2269 | 2 | * linux/arch/sh/boards/superh/microdev/led.c |
| 1da177e4 LT |
3 | * |
| 4 | * Copyright (C) 2002 Stuart Menefy <stuart.menefy@st.com> | |
| 5 | * Copyright (C) 2003 Richard Curnow (Richard.Curnow@superh.com) | |
| 6 | * | |
| 7 | * May be copied or modified under the terms of the GNU General Public | |
| 8 | * License. See linux/COPYING for more information. | |
| 9 | * | |
| 10 | */ | |
| 11 | ||
| 1da177e4 LT |
12 | #include <asm/io.h> |
| 13 | ||
| 14 | #define LED_REGISTER 0xa6104d20 | |
| 15 | ||
| 16 | static void mach_led_d9(int value) | |
| 17 | { | |
| 18 | unsigned long reg; | |
| 19 | reg = ctrl_inl(LED_REGISTER); | |
| 20 | reg &= ~1; | |
| 21 | reg |= (value & 1); | |
| 22 | ctrl_outl(reg, LED_REGISTER); | |
| 23 | return; | |
| 24 | } | |
| 25 | ||
| 26 | static void mach_led_d10(int value) | |
| 27 | { | |
| 28 | unsigned long reg; | |
| 29 | reg = ctrl_inl(LED_REGISTER); | |
| 30 | reg &= ~2; | |
| 31 | reg |= ((value & 1) << 1); | |
| 32 | ctrl_outl(reg, LED_REGISTER); | |
| 33 | return; | |
| 34 | } | |
| 35 | ||
| 36 | ||
| 37 | #ifdef CONFIG_HEARTBEAT | |
| 38 | #include <linux/sched.h> | |
| 39 | ||
| 40 | static unsigned char banner_table[] = { | |
| 41 | 0x11, 0x01, 0x11, 0x01, 0x11, 0x03, | |
| 42 | 0x11, 0x01, 0x11, 0x01, 0x13, 0x03, | |
| 43 | 0x11, 0x01, 0x13, 0x01, 0x13, 0x01, 0x11, 0x03, | |
| 44 | 0x11, 0x03, | |
| 45 | 0x11, 0x01, 0x13, 0x01, 0x11, 0x03, | |
| 46 | 0x11, 0x01, 0x11, 0x01, 0x11, 0x01, 0x11, 0x07, | |
| 47 | 0x13, 0x01, 0x13, 0x03, | |
| 48 | 0x11, 0x01, 0x11, 0x03, | |
| 49 | 0x13, 0x01, 0x11, 0x01, 0x13, 0x01, 0x11, 0x03, | |
| 50 | 0x11, 0x01, 0x13, 0x01, 0x11, 0x03, | |
| 51 | 0x13, 0x01, 0x13, 0x01, 0x13, 0x03, | |
| 52 | 0x13, 0x01, 0x11, 0x01, 0x11, 0x03, | |
| 53 | 0x11, 0x03, | |
| 54 | 0x11, 0x01, 0x11, 0x01, 0x11, 0x01, 0x13, 0x07, | |
| 55 | 0xff | |
| 56 | }; | |
| 57 | ||
| 58 | static void banner(void) | |
| 59 | { | |
| 60 | static int pos = 0; | |
| 61 | static int count = 0; | |
| 62 | ||
| 63 | if (count) { | |
| 64 | count--; | |
| 65 | } else { | |
| 66 | int val = banner_table[pos]; | |
| 67 | if (val == 0xff) { | |
| 68 | pos = 0; | |
| 69 | val = banner_table[pos]; | |
| 70 | } | |
| 71 | pos++; | |
| 72 | mach_led_d10((val >> 4) & 1); | |
| 73 | count = 10 * (val & 0xf); | |
| 74 | } | |
| 75 | } | |
| 76 | ||
| 77 | /* From heartbeat_harp in the stboards directory */ | |
| 78 | /* acts like an actual heart beat -- ie thump-thump-pause... */ | |
| 79 | void microdev_heartbeat(void) | |
| 80 | { | |
| 81 | static unsigned cnt = 0, period = 0, dist = 0; | |
| 82 | ||
| 83 | if (cnt == 0 || cnt == dist) | |
| 84 | mach_led_d9(1); | |
| 85 | else if (cnt == 7 || cnt == dist+7) | |
| 86 | mach_led_d9(0); | |
| 87 | ||
| 88 | if (++cnt > period) { | |
| 89 | cnt = 0; | |
| 90 | /* The hyperbolic function below modifies the heartbeat period | |
| 91 | * length in dependency of the current (5min) load. It goes | |
| 92 | * through the points f(0)=126, f(1)=86, f(5)=51, | |
| 93 | * f(inf)->30. */ | |
| 94 | period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30; | |
| 95 | dist = period / 4; | |
| 96 | } | |
| 97 | ||
| 98 | banner(); | |
| 99 | } | |
| 100 | ||
| 101 | #endif |