root / hw / i2c.h @ 106627d0
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1 | 0ff596d0 | pbrook | #ifndef QEMU_I2C_H
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2 | 0ff596d0 | pbrook | #define QEMU_I2C_H
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3 | 0ff596d0 | pbrook | |
4 | 0ff596d0 | pbrook | /* The QEMU I2C implementation only supports simple transfers that complete
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5 | 0ff596d0 | pbrook | immediately. It does not support slave devices that need to be able to
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6 | 0ff596d0 | pbrook | defer their response (eg. CPU slave interfaces where the data is supplied
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7 | 0ff596d0 | pbrook | by the device driver in response to an interrupt). */
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8 | 0ff596d0 | pbrook | |
9 | 0ff596d0 | pbrook | enum i2c_event {
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10 | 0ff596d0 | pbrook | I2C_START_RECV, |
11 | 0ff596d0 | pbrook | I2C_START_SEND, |
12 | 0ff596d0 | pbrook | I2C_FINISH, |
13 | aa1f17c1 | ths | I2C_NACK /* Masker NACKed a receive byte. */
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14 | 0ff596d0 | pbrook | }; |
15 | 0ff596d0 | pbrook | |
16 | 0ff596d0 | pbrook | /* Master to slave. */
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17 | 0ff596d0 | pbrook | typedef int (*i2c_send_cb)(i2c_slave *s, uint8_t data); |
18 | 0ff596d0 | pbrook | /* Slave to master. */
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19 | 0ff596d0 | pbrook | typedef int (*i2c_recv_cb)(i2c_slave *s); |
20 | 0ff596d0 | pbrook | /* Notify the slave of a bus state change. */
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21 | 0ff596d0 | pbrook | typedef void (*i2c_event_cb)(i2c_slave *s, enum i2c_event event); |
22 | 0ff596d0 | pbrook | |
23 | 0ff596d0 | pbrook | struct i2c_slave
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24 | 0ff596d0 | pbrook | { |
25 | 0ff596d0 | pbrook | /* Callbacks to be set by the device. */
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26 | 0ff596d0 | pbrook | i2c_event_cb event; |
27 | 0ff596d0 | pbrook | i2c_recv_cb recv; |
28 | 0ff596d0 | pbrook | i2c_send_cb send; |
29 | 0ff596d0 | pbrook | |
30 | 0ff596d0 | pbrook | /* Remaining fields for internal use by the I2C code. */
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31 | 0ff596d0 | pbrook | int address;
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32 | 0ff596d0 | pbrook | void *next;
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33 | 0ff596d0 | pbrook | }; |
34 | 0ff596d0 | pbrook | |
35 | 0ff596d0 | pbrook | i2c_bus *i2c_init_bus(void);
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36 | 0ff596d0 | pbrook | i2c_slave *i2c_slave_init(i2c_bus *bus, int address, int size); |
37 | 0ff596d0 | pbrook | void i2c_set_slave_address(i2c_slave *dev, int address); |
38 | 0ff596d0 | pbrook | int i2c_bus_busy(i2c_bus *bus);
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39 | 0ff596d0 | pbrook | int i2c_start_transfer(i2c_bus *bus, int address, int recv); |
40 | 0ff596d0 | pbrook | void i2c_end_transfer(i2c_bus *bus);
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41 | 0ff596d0 | pbrook | void i2c_nack(i2c_bus *bus);
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42 | 0ff596d0 | pbrook | int i2c_send(i2c_bus *bus, uint8_t data);
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43 | 0ff596d0 | pbrook | int i2c_recv(i2c_bus *bus);
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44 | aa941b94 | balrog | void i2c_bus_save(QEMUFile *f, i2c_bus *bus);
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45 | aa941b94 | balrog | void i2c_bus_load(QEMUFile *f, i2c_bus *bus);
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46 | aa941b94 | balrog | void i2c_slave_save(QEMUFile *f, i2c_slave *dev);
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47 | aa941b94 | balrog | void i2c_slave_load(QEMUFile *f, i2c_slave *dev);
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48 | 0ff596d0 | pbrook | |
49 | 87ecb68b | pbrook | /* max111x.c */
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50 | 87ecb68b | pbrook | struct max111x_s;
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51 | 87ecb68b | pbrook | uint32_t max111x_read(void *opaque);
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52 | 87ecb68b | pbrook | void max111x_write(void *opaque, uint32_t value); |
53 | 87ecb68b | pbrook | struct max111x_s *max1110_init(qemu_irq cb);
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54 | 87ecb68b | pbrook | struct max111x_s *max1111_init(qemu_irq cb);
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55 | 87ecb68b | pbrook | void max111x_set_input(struct max111x_s *s, int line, uint8_t value); |
56 | 87ecb68b | pbrook | |
57 | adb86c37 | balrog | /* max7310.c */
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58 | adb86c37 | balrog | i2c_slave *max7310_init(i2c_bus *bus); |
59 | adb86c37 | balrog | void max7310_reset(i2c_slave *i2c);
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60 | adb86c37 | balrog | qemu_irq *max7310_gpio_in_get(i2c_slave *i2c); |
61 | adb86c37 | balrog | void max7310_gpio_out_set(i2c_slave *i2c, int line, qemu_irq handler); |
62 | adb86c37 | balrog | |
63 | adb86c37 | balrog | /* wm8750.c */
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64 | adb86c37 | balrog | i2c_slave *wm8750_init(i2c_bus *bus, AudioState *audio); |
65 | adb86c37 | balrog | void wm8750_reset(i2c_slave *i2c);
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66 | adb86c37 | balrog | void wm8750_data_req_set(i2c_slave *i2c,
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67 | adb86c37 | balrog | void (*data_req)(void *, int, int), void *opaque); |
68 | adb86c37 | balrog | void wm8750_dac_dat(void *opaque, uint32_t sample); |
69 | adb86c37 | balrog | uint32_t wm8750_adc_dat(void *opaque);
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70 | adb86c37 | balrog | |
71 | 87ecb68b | pbrook | /* ssd0303.c */
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72 | 87ecb68b | pbrook | void ssd0303_init(DisplayState *ds, i2c_bus *bus, int address); |
73 | 87ecb68b | pbrook | |
74 | 0ff596d0 | pbrook | #endif |