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1 #ifndef _LINUX_I2C_ALGO_PCA_H |
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2 #define _LINUX_I2C_ALGO_PCA_H |
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3 |
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4 /* Clock speeds for the bus */ |
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5 #define I2C_PCA_CON_330kHz 0x00 |
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6 #define I2C_PCA_CON_288kHz 0x01 |
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7 #define I2C_PCA_CON_217kHz 0x02 |
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8 #define I2C_PCA_CON_146kHz 0x03 |
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9 #define I2C_PCA_CON_88kHz 0x04 |
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10 #define I2C_PCA_CON_59kHz 0x05 |
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11 #define I2C_PCA_CON_44kHz 0x06 |
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12 #define I2C_PCA_CON_36kHz 0x07 |
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13 |
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14 /* PCA9564 registers */ |
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15 #define I2C_PCA_STA 0x00 /* STATUS Read Only */ |
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16 #define I2C_PCA_TO 0x00 /* TIMEOUT Write Only */ |
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17 #define I2C_PCA_DAT 0x01 /* DATA Read/Write */ |
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18 #define I2C_PCA_ADR 0x02 /* OWN ADR Read/Write */ |
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19 #define I2C_PCA_CON 0x03 /* CONTROL Read/Write */ |
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20 |
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21 #define I2C_PCA_CON_AA 0x80 /* Assert Acknowledge */ |
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22 #define I2C_PCA_CON_ENSIO 0x40 /* Enable */ |
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23 #define I2C_PCA_CON_STA 0x20 /* Start */ |
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24 #define I2C_PCA_CON_STO 0x10 /* Stop */ |
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25 #define I2C_PCA_CON_SI 0x08 /* Serial Interrupt */ |
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26 #define I2C_PCA_CON_CR 0x07 /* Clock Rate (MASK) */ |
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27 |
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28 struct i2c_algo_pca_data { |
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29 void *data; /* private low level data */ |
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30 void (*write_byte) (void *data, int reg, int val); |
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31 int (*read_byte) (void *data, int reg); |
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32 int (*wait_for_completion) (void *data); |
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33 void (*reset_chip) (void *data); |
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34 /* i2c_clock values are defined in linux/i2c-algo-pca.h */ |
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35 unsigned int i2c_clock; |
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36 }; |
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37 |
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38 int i2c_pca_add_bus(struct i2c_adapter *); |
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39 int i2c_pca_add_numbered_bus(struct i2c_adapter *); |
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40 |
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41 #endif /* _LINUX_I2C_ALGO_PCA_H */ |