arch/sh64/mach-cayman/led.c

   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
  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
  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
  48 void mach_alphanum_brightness(int setting)
  49 {
  50         ctrl_outb(setting & 7, HDSP2534_ADDR + 0xc0);
  51 }