141 lines
4.3 KiB
C++
141 lines
4.3 KiB
C++
/*---------------------------------------------------------*\
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| i2c_smbus.h |
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| Device-independent i2c/SMBus communication functions |
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| Adam Honse (CalcProgrammer1) 08 Aug 2018 |
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| Portions based on Linux source code |
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| This file is part of the OpenRGB project |
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| SPDX-License-Identifier: GPL-2.0-only |
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\*---------------------------------------------------------*/
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#ifndef I2C_SMBUS_H
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#define I2C_SMBUS_H
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#include <atomic>
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#include <thread>
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#include <condition_variable>
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#include <mutex>
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typedef unsigned char u8;
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typedef unsigned short u16;
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typedef unsigned int u32;
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typedef int s32;
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#ifdef _WIN32
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//Data for SMBus Messages
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#define I2C_SMBUS_BLOCK_MAX 32
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union i2c_smbus_data
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{
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u8 byte;
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u16 word;
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u8 block[I2C_SMBUS_BLOCK_MAX + 2];
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};
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#endif /* _WIN32 */
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#ifdef __linux__
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#include <linux/i2c.h>
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#endif /* __linux__ */
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#if defined(__APPLE__) || defined(__FreeBSD__)
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//Data for SMBus Messages
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#define I2C_SMBUS_BLOCK_MAX 32
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union i2c_smbus_data
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{
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u8 byte;
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u16 word;
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u8 block[I2C_SMBUS_BLOCK_MAX + 2];
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};
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#endif /* __APPLE__ or __FreeBSD__ */
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// i2c_smbus_xfer read or write markers
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#define I2C_SMBUS_READ 1
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#define I2C_SMBUS_WRITE 0
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// SMBus transaction types (size parameter in the above functions)
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#define I2C_SMBUS_QUICK 0
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#define I2C_SMBUS_BYTE 1
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#define I2C_SMBUS_BYTE_DATA 2
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#define I2C_SMBUS_WORD_DATA 3
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#define I2C_SMBUS_PROC_CALL 4
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#define I2C_SMBUS_BLOCK_DATA 5
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#define I2C_SMBUS_I2C_BLOCK_BROKEN 6
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#define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
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#define I2C_SMBUS_I2C_BLOCK_DATA 8
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class i2c_smbus_interface
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{
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public:
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char device_name[512];
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int port_id;
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int pci_device;
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int pci_vendor;
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int pci_subsystem_device;
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int pci_subsystem_vendor;
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i2c_smbus_interface();
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virtual ~i2c_smbus_interface();
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void i2c_smbus_thread_function();
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//Functions derived from i2c-core.c
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s32 i2c_smbus_write_quick(u8 addr, u8 value);
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s32 i2c_smbus_read_byte(u8 addr);
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s32 i2c_smbus_write_byte(u8 addr, u8 value);
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s32 i2c_smbus_read_byte_data(u8 addr, u8 command);
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s32 i2c_smbus_write_byte_data(u8 addr, u8 command, u8 value);
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s32 i2c_smbus_read_word_data(u8 addr, u8 command);
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s32 i2c_smbus_write_word_data(u8 addr, u8 command, u16 value);
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s32 i2c_smbus_read_block_data(u8 addr, u8 command, u8 *values);
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s32 i2c_smbus_write_block_data(u8 addr, u8 command, u8 length, const u8 *values);
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s32 i2c_smbus_read_i2c_block_data(u8 addr, u8 command, u8 length, u8 *values);
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s32 i2c_smbus_write_i2c_block_data(u8 addr, u8 command, u8 length, const u8 *values);
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//Addtional functions added for pure I2C block operations
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s32 i2c_read_block(u8 addr, int* size, u8* data);
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s32 i2c_write_block(u8 addr, int size, u8* data);
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//Handle SMBus and I2C transfer calls in a single thread
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s32 i2c_smbus_xfer_call(u8 addr, char read_write, u8 command, int size, i2c_smbus_data* data);
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s32 i2c_xfer_call(u8 addr, char read_write, int* size, u8 *data);
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virtual s32 i2c_smbus_xfer(u8 addr, char read_write, u8 command, int size, i2c_smbus_data* data) = 0;
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virtual s32 i2c_xfer(u8 addr, char read_write, int* size, u8* data) = 0;
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private:
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std::thread * i2c_smbus_thread;
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std::atomic<bool> i2c_smbus_thread_running;
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std::atomic<bool> i2c_smbus_start;
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std::condition_variable i2c_smbus_start_cv;
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std::mutex i2c_smbus_start_mutex;
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std::atomic<bool> i2c_smbus_done;
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std::condition_variable i2c_smbus_done_cv;
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std::mutex i2c_smbus_done_mutex;
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std::mutex i2c_smbus_xfer_mutex;
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u8 i2c_addr;
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char i2c_read_write;
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u16 i2c_command;
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int i2c_size_smbus;
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int* i2c_size;
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i2c_smbus_data* i2c_data_smbus;
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u8* i2c_data;
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s32 i2c_ret;
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bool smbus_xfer;
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};
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#endif /* I2C_SMBUS_H */
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