1 /*
2 * arch/sh64/kernel/led_cayman.c
3 *
4 * Copyright (C) 2002 Stuart Menefy <stuart.menefy@st.com>
5 *
6 * May be copied or modified under the terms of the GNU General Public
7 * License. See linux/COPYING for more information.
8 *
9 * Flash the LEDs
10 */
11 #include <asm/io.h>
12
13 /*
14 ** It is supposed these functions to be used for a low level
15 ** debugging (via Cayman LEDs), hence to be available as soon
16 ** as possible.
17 ** Unfortunately Cayman LEDs relies on Cayman EPLD to be mapped
18 ** (this happen when IRQ are initialized... quite late).
19 ** These triky dependencies should be removed. Temporary, it
20 ** may be enough to NOP until EPLD is mapped.
21 */
22
23 extern unsigned long epld_virt;
24
25 #define LED_ADDR (epld_virt + 0x008)
26 #define HDSP2534_ADDR (epld_virt + 0x100)
27
mach_led(int position,int value)28 void mach_led(int position, int value)
29 {
30 if (!epld_virt)
31 return;
32
33 if (value)
34 ctrl_outl(0, LED_ADDR);
35 else
36 ctrl_outl(1, LED_ADDR);
37
38 }
39
mach_alphanum(int position,unsigned char value)40 void mach_alphanum(int position, unsigned char value)
41 {
42 if (!epld_virt)
43 return;
44
45 ctrl_outb(value, HDSP2534_ADDR + 0xe0 + (position << 2));
46 }
47
mach_alphanum_brightness(int setting)48 void mach_alphanum_brightness(int setting)
49 {
50 ctrl_outb(setting & 7, HDSP2534_ADDR + 0xc0);
51 }
52