/* * linux/arch/arm/mach-integrator/leds.c * * Integrator/AP and Integrator/CP LED control routines * * Copyright (C) 1999 ARM Limited * Copyright (C) 2000 Deep Blue Solutions Ltd * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/smp.h> #include <linux/spinlock.h> #include <linux/io.h> #include <mach/hardware.h> #include <mach/platform.h> #include <asm/leds.h> #include <asm/system.h> #include <asm/mach-types.h> #include <mach/cm.h> static int saved_leds; static void integrator_leds_event(led_event_t ledevt) { unsigned long flags; const unsigned int dbg_base = IO_ADDRESS(INTEGRATOR_DBG_BASE); unsigned int update_alpha_leds; // yup, change the LEDs local_irq_save(flags); update_alpha_leds = 0; switch(ledevt) { case led_idle_start: cm_control(CM_CTRL_LED, 0); break; case led_idle_end: cm_control(CM_CTRL_LED, CM_CTRL_LED); break; case led_timer: saved_leds ^= GREEN_LED; update_alpha_leds = 1; break; case led_red_on: saved_leds |= RED_LED; update_alpha_leds = 1; break; case led_red_off: saved_leds &= ~RED_LED; update_alpha_leds = 1; break; default: break; } if (update_alpha_leds) { while (__raw_readl(dbg_base + INTEGRATOR_DBG_ALPHA_OFFSET) & 1); __raw_writel(saved_leds, dbg_base + INTEGRATOR_DBG_LEDS_OFFSET); } local_irq_restore(flags); } static int __init leds_init(void) { if (machine_is_integrator() || machine_is_cintegrator()) leds_event = integrator_leds_event; return 0; } core_initcall(leds_init);