platform/bcm2835/include/mailbox.h

   1 #ifndef _BCM2835_MAILBOX_H
   2 #define _BCM2835_MAILBOX_H
   3
   4 #include <stdint.h>
   5
   6 #define MAILBOX_BASE    0x2000B880
   7 #define MAILBOX_POLL    0x10
   8 #define MAILBOX_SENDER  0x14
   9 #define MAILBOX_STATUS  0x18
  10 #define MAILBOX_CONFIG  0x1C
  11 #define MAILBOX_WRITE   0x20
  12
  13 #define EMMC_CLOCK_ID   0x01
  14 #define UART_CLOCK_ID   0x02
  15 #define ARM_CLOCK_ID    0x03
  16 #define CORE_CLOCK_ID   0x04
  17 #define V3D_CLOCK_ID    0x05
  18 #define H264_CLOCK_ID   0x06
  19 #define ISP_CLOCK_ID    0x07
  20 #define SDRAM_CLOCK_ID  0x08
  21 #define PIXEL_CLOCK_ID  0x09
  22 #define PWM_CLOCK_ID    0x0A
  23
  24 #define MAILBOX_ARM_TO_VC 8
  25
  26 #define MAILBOX_SUCCESS 0x80000000
  27
  28 #define MAILBOX_TIMEOUT 100
  29
  30 /*
  31  * Synchronously write to the mailbox.
  32  *     uint32_t data.
  33  *     uint8_t channel.
  34  */
  35 void mailbox_write(uint32_t data, uint8_t channel);
  36
  37 /*
  38  * Synchronously read from the mailbox.
  39  *     uint8_t channel.
  40  *
  41  * Returns:
  42  *     uint32_t.
  43  */
  44 uint32_t mailbox_read(uint8_t channel);
  45
  46 #endif /* _BCM2835_MAILBOX_H */