forked from Imagelibrary/rtems
122 lines
2.5 KiB
C
122 lines
2.5 KiB
C
/**
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* @file
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*
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* @ingroup arm_beagle
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*
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* @brief I2C support API.
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*/
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/*
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* Copyright (c) 2012 Claas Ziemke. All rights reserved.
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*
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* Claas Ziemke
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* Kernerstrasse 11
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* 70182 Stuttgart
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* Germany
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* <claas.ziemke@gmx.net>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#ifndef LIBBSP_ARM_BEAGLE_I2C_H
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#define LIBBSP_ARM_BEAGLE_I2C_H
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#include <rtems.h>
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#include <bsp.h>
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#include <dev/i2c/i2c.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#define BBB_I2C_SYSCLK 48000000
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#define BBB_I2C_INTERNAL_CLK 12000000
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#define BBB_I2C_0_BUS_PATH "/dev/i2c-0"
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#define BBB_I2C_1_BUS_PATH "/dev/i2c-1"
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#define BBB_I2C_2_BUS_PATH "/dev/i2c-2"
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#define BBB_I2C0_IRQ 70
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#define BBB_I2C1_IRQ 71
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#define BBB_I2C2_IRQ 30
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typedef enum {
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I2C0,
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I2C1,
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I2C2,
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I2C_COUNT
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} bbb_i2c_id_t;
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typedef struct i2c_regs {
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uint32_t BBB_I2C_REVNB_LO;
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uint32_t BBB_I2C_REVNB_HI;
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uint32_t dummy1[ 2 ];
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uint32_t BBB_I2C_SYSC;
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uint32_t dummy2[ 4 ];
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uint32_t BBB_I2C_IRQSTATUS_RAW;
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uint32_t BBB_I2C_IRQSTATUS;
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uint32_t BBB_I2C_IRQENABLE_SET;
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uint32_t BBB_I2C_IRQENABLE_CLR;
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uint32_t BBB_I2C_WE;
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uint32_t BBB_I2C_DMARXENABLE_SET;
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uint32_t BBB_I2C_DMATXENABLE_SET;
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uint32_t BBB_I2C_DMARXENABLE_CLR;
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uint32_t BBB_I2C_DMATXENABLE_CLR;
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uint32_t BBB_I2C_DMARXWAKE_EN;
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uint32_t BBB_I2C_DMATXWAKE_EN;
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uint32_t dummy3[ 16 ];
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uint32_t BBB_I2C_SYSS;
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uint32_t BBB_I2C_BUF;
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uint32_t BBB_I2C_CNT;
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uint32_t BBB_I2C_DATA;
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uint32_t dummy4;
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uint32_t BBB_I2C_CON;
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uint32_t BBB_I2C_OA;
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uint32_t BBB_I2C_SA;
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uint32_t BBB_I2C_PSC;
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uint32_t BBB_I2C_SCLL;
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uint32_t BBB_I2C_SCLH;
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uint32_t BBB_I2C_SYSTEST;
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uint32_t BBB_I2C_BUFSTAT;
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uint32_t BBB_I2C_OA1;
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uint32_t BBB_I2C_OA2;
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uint32_t BBB_I2C_OA3;
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uint32_t BBB_I2C_ACTOA;
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uint32_t BBB_I2C_SBLOCK;
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} bbb_i2c_regs;
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int am335x_i2c_bus_register(
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const char *bus_path,
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uintptr_t register_base,
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uint32_t input_clock, /* FIXME: Unused. Left for compatibility. */
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rtems_vector_number irq
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);
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static inline int bbb_register_i2c_1( void )
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{
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return am335x_i2c_bus_register(
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BBB_I2C_1_BUS_PATH,
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AM335X_I2C1_BASE,
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I2C_BUS_CLOCK_DEFAULT,
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BBB_I2C1_IRQ
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);
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}
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static inline int bbb_register_i2c_2( void )
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{
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return am335x_i2c_bus_register(
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BBB_I2C_2_BUS_PATH,
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AM335X_I2C2_BASE,
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I2C_BUS_CLOCK_DEFAULT,
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BBB_I2C2_IRQ
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);
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}
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* LIBBSP_ARM_BEAGLE_I2C_H */
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