Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-integrator/leds.c |
| 3 | * |
| 4 | * Integrator/AP and Integrator/CP LED control routines |
| 5 | * |
| 6 | * Copyright (C) 1999 ARM Limited |
| 7 | * Copyright (C) 2000 Deep Blue Solutions Ltd |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | */ |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/init.h> |
Russell King | 20cf33e | 2005-06-18 10:15:46 +0100 | [diff] [blame] | 25 | #include <linux/smp.h> |
| 26 | #include <linux/spinlock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
| 28 | #include <asm/hardware.h> |
| 29 | #include <asm/io.h> |
| 30 | #include <asm/leds.h> |
| 31 | #include <asm/system.h> |
| 32 | #include <asm/mach-types.h> |
| 33 | #include <asm/arch/cm.h> |
| 34 | |
| 35 | static int saved_leds; |
| 36 | |
| 37 | static void integrator_leds_event(led_event_t ledevt) |
| 38 | { |
| 39 | unsigned long flags; |
| 40 | const unsigned int dbg_base = IO_ADDRESS(INTEGRATOR_DBG_BASE); |
| 41 | unsigned int update_alpha_leds; |
Russell King | 1f9c381 | 2005-05-03 12:22:19 +0100 | [diff] [blame] | 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | // yup, change the LEDs |
| 44 | local_irq_save(flags); |
| 45 | update_alpha_leds = 0; |
| 46 | |
| 47 | switch(ledevt) { |
| 48 | case led_idle_start: |
| 49 | cm_control(CM_CTRL_LED, 0); |
| 50 | break; |
| 51 | |
| 52 | case led_idle_end: |
| 53 | cm_control(CM_CTRL_LED, CM_CTRL_LED); |
| 54 | break; |
| 55 | |
| 56 | case led_timer: |
| 57 | saved_leds ^= GREEN_LED; |
| 58 | update_alpha_leds = 1; |
| 59 | break; |
| 60 | |
| 61 | case led_red_on: |
| 62 | saved_leds |= RED_LED; |
| 63 | update_alpha_leds = 1; |
| 64 | break; |
| 65 | |
| 66 | case led_red_off: |
| 67 | saved_leds &= ~RED_LED; |
| 68 | update_alpha_leds = 1; |
| 69 | break; |
| 70 | |
| 71 | default: |
| 72 | break; |
| 73 | } |
| 74 | |
| 75 | if (update_alpha_leds) { |
| 76 | while (__raw_readl(dbg_base + INTEGRATOR_DBG_ALPHA_OFFSET) & 1); |
| 77 | __raw_writel(saved_leds, dbg_base + INTEGRATOR_DBG_LEDS_OFFSET); |
| 78 | } |
| 79 | local_irq_restore(flags); |
| 80 | } |
| 81 | |
| 82 | static int __init leds_init(void) |
| 83 | { |
| 84 | if (machine_is_integrator() || machine_is_cintegrator()) |
| 85 | leds_event = integrator_leds_event; |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | |
Russell King | 20cf33e | 2005-06-18 10:15:46 +0100 | [diff] [blame] | 90 | core_initcall(leds_init); |