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1 #ifndef QEMU_I2C_H |
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2 #define QEMU_I2C_H |
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3 |
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4 /* The QEMU I2C implementation only supports simple transfers that complete |
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5 immediately. It does not support slave devices that need to be able to |
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6 defer their response (eg. CPU slave interfaces where the data is supplied |
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7 by the device driver in response to an interrupt). */ |
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8 |
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9 enum i2c_event { |
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10 I2C_START_RECV, |
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11 I2C_START_SEND, |
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12 I2C_FINISH, |
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13 I2C_NACK /* Masker NACKed a receive byte. */ |
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14 }; |
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15 |
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16 /* Master to slave. */ |
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17 typedef int (*i2c_send_cb)(i2c_slave *s, uint8_t data); |
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18 /* Slave to master. */ |
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19 typedef int (*i2c_recv_cb)(i2c_slave *s); |
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20 /* Notify the slave of a bus state change. */ |
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21 typedef void (*i2c_event_cb)(i2c_slave *s, enum i2c_event event); |
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22 |
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23 struct i2c_slave |
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24 { |
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25 /* Callbacks to be set by the device. */ |
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26 i2c_event_cb event; |
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27 i2c_recv_cb recv; |
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28 i2c_send_cb send; |
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29 |
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30 /* Remaining fields for internal use by the I2C code. */ |
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31 int address; |
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32 void *next; |
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33 i2c_bus *bus; |
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34 }; |
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35 |
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36 i2c_bus *i2c_init_bus(void); |
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37 i2c_slave *i2c_slave_init(i2c_bus *bus, int address, int size); |
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38 void i2c_set_slave_address(i2c_slave *dev, int address); |
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39 int i2c_bus_busy(i2c_bus *bus); |
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40 int i2c_start_transfer(i2c_bus *bus, int address, int recv); |
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41 void i2c_end_transfer(i2c_bus *bus); |
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42 void i2c_nack(i2c_bus *bus); |
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43 int i2c_send(i2c_bus *bus, uint8_t data); |
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44 int i2c_recv(i2c_bus *bus); |
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45 void i2c_slave_save(QEMUFile *f, i2c_slave *dev); |
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46 void i2c_slave_load(QEMUFile *f, i2c_slave *dev); |
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47 |
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48 /* max111x.c */ |
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49 struct max111x_s; |
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50 uint32_t max111x_read(void *opaque); |
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51 void max111x_write(void *opaque, uint32_t value); |
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52 struct max111x_s *max1110_init(qemu_irq cb); |
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53 struct max111x_s *max1111_init(qemu_irq cb); |
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54 void max111x_set_input(struct max111x_s *s, int line, uint8_t value); |
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55 |
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56 /* max7310.c */ |
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57 i2c_slave *max7310_init(i2c_bus *bus); |
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58 void max7310_reset(i2c_slave *i2c); |
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59 qemu_irq *max7310_gpio_in_get(i2c_slave *i2c); |
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60 void max7310_gpio_out_set(i2c_slave *i2c, int line, qemu_irq handler); |
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61 |
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62 /* wm8750.c */ |
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63 i2c_slave *wm8750_init(i2c_bus *bus, AudioState *audio); |
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64 void wm8750_reset(i2c_slave *i2c); |
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65 void wm8750_data_req_set(i2c_slave *i2c, |
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66 void (*data_req)(void *, int, int), void *opaque); |
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67 void wm8750_dac_dat(void *opaque, uint32_t sample); |
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68 uint32_t wm8750_adc_dat(void *opaque); |
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69 void *wm8750_dac_buffer(void *opaque, int samples); |
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70 void wm8750_dac_commit(void *opaque); |
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71 void wm8750_set_bclk_in(void *opaque, int new_hz); |
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72 |
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73 /* ssd0303.c */ |
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74 void ssd0303_init(DisplayState *ds, i2c_bus *bus, int address); |
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75 |
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76 /* twl92230.c */ |
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77 i2c_slave *twl92230_init(i2c_bus *bus, qemu_irq irq); |
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78 qemu_irq *twl92230_gpio_in_get(i2c_slave *i2c); |
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79 void twl92230_gpio_out_set(i2c_slave *i2c, int line, qemu_irq handler); |
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80 |
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81 /* tmp105.c */ |
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82 struct i2c_slave *tmp105_init(i2c_bus *bus, qemu_irq alarm); |
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83 void tmp105_reset(i2c_slave *i2c); |
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84 void tmp105_set(i2c_slave *i2c, int temp); |
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85 |
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86 /* lm832x.c */ |
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87 struct i2c_slave *lm8323_init(i2c_bus *bus, qemu_irq nirq); |
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88 void lm832x_key_event(struct i2c_slave *i2c, int key, int state); |
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89 |
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90 #endif |