| Christopher Meis | 7e446a4 | 2024-10-22 09:36:41 +0200 | [diff] [blame] | 1 | #include "i2c.hpp" |
| 2 | |
| 3 | #include <unistd.h> |
| 4 | |
| 5 | extern "C" |
| 6 | { |
| 7 | #include <i2c/smbus.h> |
| 8 | #include <linux/i2c-dev.h> |
| 9 | #include <linux/i2c.h> |
| 10 | } |
| 11 | |
| 12 | namespace phosphor::i2c |
| 13 | { |
| 14 | |
| 15 | int I2C::open() |
| 16 | { |
| 17 | int ret = 0; |
| 18 | fd = ::open(busStr.c_str(), O_RDWR); |
| 19 | if (fd < 0) |
| 20 | { |
| 21 | return fd; |
| 22 | } |
| 23 | |
| 24 | ret = ioctl(fd, I2C_SLAVE_FORCE, deviceNode); |
| 25 | if (ret < 0) |
| 26 | { |
| 27 | close(); |
| 28 | return ret; |
| 29 | } |
| 30 | |
| 31 | return 0; |
| 32 | } |
| 33 | |
| 34 | // NOLINTBEGIN(readability-static-accessed-through-instance) |
| 35 | sdbusplus::async::task<bool> I2C::sendReceive( |
| 36 | uint8_t* writeData, uint8_t writeSize, uint8_t* readData, |
| 37 | uint8_t readSize) const |
| 38 | // NOLINTEND(readability-static-accessed-through-instance) |
| 39 | { |
| 40 | if (fd <= 0) |
| 41 | { |
| 42 | co_return false; |
| 43 | } |
| 44 | |
| 45 | struct i2c_msg msg[2]; |
| 46 | struct i2c_rdwr_ioctl_data readWriteData; |
| 47 | int msgIndex = 0; |
| 48 | |
| 49 | if (writeSize) |
| 50 | { |
| 51 | msg[msgIndex].addr = deviceNode; |
| 52 | msg[msgIndex].flags = 0; |
| 53 | msg[msgIndex].len = writeSize; |
| 54 | msg[msgIndex].buf = writeData; |
| 55 | msgIndex++; |
| 56 | } |
| 57 | |
| 58 | if (readSize) |
| 59 | { |
| 60 | msg[msgIndex].addr = deviceNode; |
| 61 | msg[msgIndex].flags = I2C_M_RD; |
| 62 | msg[msgIndex].len = readSize; |
| 63 | msg[msgIndex].buf = readData; |
| 64 | msgIndex++; |
| 65 | } |
| 66 | |
| 67 | readWriteData.msgs = msg; |
| 68 | readWriteData.nmsgs = msgIndex; |
| 69 | |
| 70 | if (ioctl(fd, I2C_RDWR, &readWriteData) < 0) |
| 71 | { |
| 72 | co_return false; |
| 73 | } |
| 74 | co_return true; |
| 75 | } |
| 76 | |
| 77 | int I2C::close() const |
| 78 | { |
| 79 | return ::close(fd); |
| 80 | } |
| 81 | |
| 82 | } // namespace phosphor::i2c |