arch/powerpc/include/asm/status_led.h

   1 /*
   2  * asm/status_led.h
   3  *
   4  * MPC8xx/MPC8260/MPC5xx based status led support functions
   5  */
   6
   7 #ifndef __ASM_STATUS_LED_H__
   8 #define __ASM_STATUS_LED_H__
   9
  10 /* if not overridden */
  11 #ifndef CONFIG_LED_STATUS_BOARD_SPECIFIC
  12 # if defined(CONFIG_5xx)
  13 #  include <mpc5xx.h>
  14 # else
  15 #  error CPU specific Status LED header file missing.
  16 #endif
  17
  18 /* led_id_t is unsigned long mask */
  19 typedef unsigned long led_id_t;
  20
  21 static inline void __led_init (led_id_t mask, int state)
  22 {
  23         volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
  24
  25 #ifdef STATUS_LED_PAR
  26         immr->STATUS_LED_PAR &= ~mask;
  27 #endif
  28 #ifdef STATUS_LED_ODR
  29         immr->STATUS_LED_ODR &= ~mask;
  30 #endif
  31
  32 #if (STATUS_LED_ACTIVE == 0)
  33         if (state == CONFIG_LED_STATUS_ON)
  34                 immr->STATUS_LED_DAT &= ~mask;
  35         else
  36                 immr->STATUS_LED_DAT |= mask;
  37 #else
  38         if (state == CONFIG_LED_STATUS_ON)
  39                 immr->STATUS_LED_DAT |= mask;
  40         else
  41                 immr->STATUS_LED_DAT &= ~mask;
  42 #endif
  43 #ifdef STATUS_LED_DIR
  44         immr->STATUS_LED_DIR |= mask;
  45 #endif
  46 }
  47
  48 static inline void __led_toggle (led_id_t mask)
  49 {
  50         ((immap_t *) CONFIG_SYS_IMMR)->STATUS_LED_DAT ^= mask;
  51 }
  52
  53 static inline void __led_set (led_id_t mask, int state)
  54 {
  55         volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
  56
  57 #if (STATUS_LED_ACTIVE == 0)
  58         if (state == CONFIG_LED_STATUS_ON)
  59                 immr->STATUS_LED_DAT &= ~mask;
  60         else
  61                 immr->STATUS_LED_DAT |= mask;
  62 #else
  63         if (state == CONFIG_LED_STATUS_ON)
  64                 immr->STATUS_LED_DAT |= mask;
  65         else
  66                 immr->STATUS_LED_DAT &= ~mask;
  67 #endif
  68
  69 }
  70
  71 #endif
  72
  73 #endif  /* __ASM_STATUS_LED_H__ */