include/asm-ppc/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 overriden */
  11 #ifndef CONFIG_BOARD_SPECIFIC_LED
  12 # if defined(CONFIG_8xx)
  13 #  include <mpc8xx.h>
  14 # elif defined(CONFIG_8260)
  15 #  include <mpc8260.h>
  16 # elif defined(CONFIG_5xx)
  17 #  include <mpc5xx.h>
  18 # else
  19 #  error CPU specific Status LED header file missing.
  20 #endif
  21
  22 /* led_id_t is unsigned long mask */
  23 typedef unsigned long led_id_t;
  24
  25 static inline void __led_init (led_id_t mask, int state)
  26 {
  27         volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
  28
  29 #ifdef STATUS_LED_PAR
  30         immr->STATUS_LED_PAR &= ~mask;
  31 #endif
  32 #ifdef STATUS_LED_ODR
  33         immr->STATUS_LED_ODR &= ~mask;
  34 #endif
  35
  36 #if (STATUS_LED_ACTIVE == 0)
  37         if (state == STATUS_LED_ON)
  38                 immr->STATUS_LED_DAT &= ~mask;
  39         else
  40                 immr->STATUS_LED_DAT |= mask;
  41 #else
  42         if (state == STATUS_LED_ON)
  43                 immr->STATUS_LED_DAT |= mask;
  44         else
  45                 immr->STATUS_LED_DAT &= ~mask;
  46 #endif
  47 #ifdef STATUS_LED_DIR
  48         immr->STATUS_LED_DIR |= mask;
  49 #endif
  50 }
  51
  52 static inline void __led_toggle (led_id_t mask)
  53 {
  54         ((immap_t *) CONFIG_SYS_IMMR)->STATUS_LED_DAT ^= mask;
  55 }
  56
  57 static inline void __led_set (led_id_t mask, int state)
  58 {
  59         volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
  60
  61 #if (STATUS_LED_ACTIVE == 0)
  62         if (state == STATUS_LED_ON)
  63                 immr->STATUS_LED_DAT &= ~mask;
  64         else
  65                 immr->STATUS_LED_DAT |= mask;
  66 #else
  67         if (state == STATUS_LED_ON)
  68                 immr->STATUS_LED_DAT |= mask;
  69         else
  70                 immr->STATUS_LED_DAT &= ~mask;
  71 #endif
  72
  73 }
  74
  75 #endif
  76
  77 #endif  /* __ASM_STATUS_LED_H__ */