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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 | 0ff596d0 | pbrook | I2C_NACK /* Masker NACKed a recieve byte. */
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14 | 0ff596d0 | pbrook | }; |
15 | 0ff596d0 | pbrook | |
16 | 0ff596d0 | pbrook | typedef struct i2c_slave i2c_slave; |
17 | 0ff596d0 | pbrook | |
18 | 0ff596d0 | pbrook | /* Master to slave. */
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19 | 0ff596d0 | pbrook | typedef int (*i2c_send_cb)(i2c_slave *s, uint8_t data); |
20 | 0ff596d0 | pbrook | /* Slave to master. */
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21 | 0ff596d0 | pbrook | typedef int (*i2c_recv_cb)(i2c_slave *s); |
22 | 0ff596d0 | pbrook | /* Notify the slave of a bus state change. */
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23 | 0ff596d0 | pbrook | typedef void (*i2c_event_cb)(i2c_slave *s, enum i2c_event event); |
24 | 0ff596d0 | pbrook | |
25 | 0ff596d0 | pbrook | struct i2c_slave
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26 | 0ff596d0 | pbrook | { |
27 | 0ff596d0 | pbrook | /* Callbacks to be set by the device. */
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28 | 0ff596d0 | pbrook | i2c_event_cb event; |
29 | 0ff596d0 | pbrook | i2c_recv_cb recv; |
30 | 0ff596d0 | pbrook | i2c_send_cb send; |
31 | 0ff596d0 | pbrook | |
32 | 0ff596d0 | pbrook | /* Remaining fields for internal use by the I2C code. */
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33 | 0ff596d0 | pbrook | int address;
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34 | 0ff596d0 | pbrook | void *next;
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35 | 0ff596d0 | pbrook | }; |
36 | 0ff596d0 | pbrook | |
37 | 0ff596d0 | pbrook | typedef struct i2c_bus i2c_bus; |
38 | 0ff596d0 | pbrook | |
39 | 0ff596d0 | pbrook | i2c_bus *i2c_init_bus(void);
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40 | 0ff596d0 | pbrook | i2c_slave *i2c_slave_init(i2c_bus *bus, int address, int size); |
41 | 0ff596d0 | pbrook | void i2c_set_slave_address(i2c_slave *dev, int address); |
42 | 0ff596d0 | pbrook | int i2c_bus_busy(i2c_bus *bus);
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43 | 0ff596d0 | pbrook | int i2c_start_transfer(i2c_bus *bus, int address, int recv); |
44 | 0ff596d0 | pbrook | void i2c_end_transfer(i2c_bus *bus);
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45 | 0ff596d0 | pbrook | void i2c_nack(i2c_bus *bus);
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46 | 0ff596d0 | pbrook | int i2c_send(i2c_bus *bus, uint8_t data);
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47 | 0ff596d0 | pbrook | int i2c_recv(i2c_bus *bus);
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48 | aa941b94 | balrog | void i2c_bus_save(QEMUFile *f, i2c_bus *bus);
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49 | aa941b94 | balrog | void i2c_bus_load(QEMUFile *f, i2c_bus *bus);
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50 | aa941b94 | balrog | void i2c_slave_save(QEMUFile *f, i2c_slave *dev);
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51 | aa941b94 | balrog | void i2c_slave_load(QEMUFile *f, i2c_slave *dev);
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52 | 0ff596d0 | pbrook | |
53 | adb86c37 | balrog | /* max7310.c */
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54 | adb86c37 | balrog | i2c_slave *max7310_init(i2c_bus *bus); |
55 | adb86c37 | balrog | void max7310_reset(i2c_slave *i2c);
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56 | adb86c37 | balrog | qemu_irq *max7310_gpio_in_get(i2c_slave *i2c); |
57 | adb86c37 | balrog | void max7310_gpio_out_set(i2c_slave *i2c, int line, qemu_irq handler); |
58 | adb86c37 | balrog | |
59 | adb86c37 | balrog | /* wm8750.c */
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60 | adb86c37 | balrog | i2c_slave *wm8750_init(i2c_bus *bus, AudioState *audio); |
61 | adb86c37 | balrog | void wm8750_reset(i2c_slave *i2c);
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62 | adb86c37 | balrog | void wm8750_data_req_set(i2c_slave *i2c,
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63 | adb86c37 | balrog | void (*data_req)(void *, int, int), void *opaque); |
64 | adb86c37 | balrog | void wm8750_dac_dat(void *opaque, uint32_t sample); |
65 | adb86c37 | balrog | uint32_t wm8750_adc_dat(void *opaque);
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66 | adb86c37 | balrog | |
67 | 0ff596d0 | pbrook | #endif |