kopia lustrzana https://github.com/hoglet67/RGBtoHDMI
50 wiersze
1.4 KiB
C
50 wiersze
1.4 KiB
C
#ifndef RPI_MAILBOX_H
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#define RPI_MAILBOX_H
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#include "rpi-base.h"
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#include "startup.h"
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#define RPI_MAILBOX0_BASE ( _get_peripheral_base() + 0xB880 )
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/* The available mailbox channels in the BCM2835 Mailbox interface.
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See https://github.com/raspberrypi/firmware/wiki/Mailboxes for
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information */
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typedef enum {
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MB0_POWER_MANAGEMENT = 0,
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MB0_FRAMEBUFFER,
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MB0_VIRTUAL_UART,
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MB0_VCHIQ,
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MB0_LEDS,
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MB0_BUTTONS,
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MB0_TOUCHSCREEN,
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MB0_UNUSED,
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MB0_TAGS_ARM_TO_VC,
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MB0_TAGS_VC_TO_ARM,
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} mailbox0_channel_t;
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/* These defines come from the Broadcom Videocode driver source code, see:
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brcm_usrlib/dag/vmcsx/vcinclude/bcm2708_chip/arm_control.h */
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enum mailbox_status_reg_bits {
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ARM_MS_FULL = 0x80000000,
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ARM_MS_EMPTY = 0x40000000,
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ARM_MS_LEVEL = 0x400000FF,
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};
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/* Define a structure which defines the register access to a mailbox.
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Not all mailboxes support the full register set! */
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typedef struct {
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volatile unsigned int Read;
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volatile unsigned int reserved1[((0x90 - 0x80) / 4) - 1];
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volatile unsigned int Poll;
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volatile unsigned int Sender;
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volatile unsigned int Status;
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volatile unsigned int Configuration;
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volatile unsigned int Write;
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} mailbox_t;
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extern void RPI_Mailbox0Write( mailbox0_channel_t channel, int value );
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extern int RPI_Mailbox0Read( mailbox0_channel_t channel );
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extern int RPI_Mailbox0Flush( mailbox0_channel_t channel );
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#endif
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