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1da177e4 LT |
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> | |
20cf33ea RK |
25 | #include <linux/smp.h> |
26 | #include <linux/spinlock.h> | |
fced80c7 | 27 | #include <linux/io.h> |
1da177e4 | 28 | |
a09e64fb | 29 | #include <mach/hardware.h> |
a285edcf | 30 | #include <mach/platform.h> |
1da177e4 | 31 | #include <asm/leds.h> |
1da177e4 | 32 | #include <asm/mach-types.h> |
a09e64fb | 33 | #include <mach/cm.h> |
1da177e4 LT |
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; | |
1f9c381f | 42 | |
1da177e4 LT |
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 | ||
20cf33ea | 90 | core_initcall(leds_init); |