root / hw / i2c.h @ a8a358bf
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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 | fe8de492 | Paul Brook | #include "qdev.h" |
5 | fe8de492 | Paul Brook | |
6 | 0ff596d0 | pbrook | /* The QEMU I2C implementation only supports simple transfers that complete
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7 | 0ff596d0 | pbrook | immediately. It does not support slave devices that need to be able to
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8 | 0ff596d0 | pbrook | defer their response (eg. CPU slave interfaces where the data is supplied
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9 | 0ff596d0 | pbrook | by the device driver in response to an interrupt). */
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10 | 0ff596d0 | pbrook | |
11 | 0ff596d0 | pbrook | enum i2c_event {
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12 | 0ff596d0 | pbrook | I2C_START_RECV, |
13 | 0ff596d0 | pbrook | I2C_START_SEND, |
14 | 0ff596d0 | pbrook | I2C_FINISH, |
15 | aa1f17c1 | ths | I2C_NACK /* Masker NACKed a receive byte. */
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16 | 0ff596d0 | pbrook | }; |
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 | fe8de492 | Paul Brook | typedef void (*i2c_slave_initfn)(i2c_slave *dev); |
26 | fe8de492 | Paul Brook | |
27 | fe8de492 | Paul Brook | typedef struct { |
28 | 02e2da45 | Paul Brook | DeviceInfo qdev; |
29 | 02e2da45 | Paul Brook | |
30 | fe8de492 | Paul Brook | /* Callbacks provided by the device. */
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31 | fe8de492 | Paul Brook | i2c_slave_initfn init; |
32 | fe8de492 | Paul Brook | i2c_event_cb event; |
33 | fe8de492 | Paul Brook | i2c_recv_cb recv; |
34 | fe8de492 | Paul Brook | i2c_send_cb send; |
35 | fe8de492 | Paul Brook | } I2CSlaveInfo; |
36 | fe8de492 | Paul Brook | |
37 | 0ff596d0 | pbrook | struct i2c_slave
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38 | 0ff596d0 | pbrook | { |
39 | fe8de492 | Paul Brook | DeviceState qdev; |
40 | fe8de492 | Paul Brook | I2CSlaveInfo *info; |
41 | 0ff596d0 | pbrook | |
42 | 0ff596d0 | pbrook | /* Remaining fields for internal use by the I2C code. */
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43 | ee6847d1 | Gerd Hoffmann | uint32_t address; |
44 | 0ff596d0 | pbrook | }; |
45 | 0ff596d0 | pbrook | |
46 | 02e2da45 | Paul Brook | i2c_bus *i2c_init_bus(DeviceState *parent, const char *name); |
47 | 0ff596d0 | pbrook | void i2c_set_slave_address(i2c_slave *dev, int address); |
48 | 0ff596d0 | pbrook | int i2c_bus_busy(i2c_bus *bus);
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49 | 0ff596d0 | pbrook | int i2c_start_transfer(i2c_bus *bus, int address, int recv); |
50 | 0ff596d0 | pbrook | void i2c_end_transfer(i2c_bus *bus);
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51 | 0ff596d0 | pbrook | void i2c_nack(i2c_bus *bus);
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52 | 0ff596d0 | pbrook | int i2c_send(i2c_bus *bus, uint8_t data);
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53 | 0ff596d0 | pbrook | int i2c_recv(i2c_bus *bus);
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54 | aa941b94 | balrog | void i2c_slave_save(QEMUFile *f, i2c_slave *dev);
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55 | aa941b94 | balrog | void i2c_slave_load(QEMUFile *f, i2c_slave *dev);
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56 | 0ff596d0 | pbrook | |
57 | fe8de492 | Paul Brook | #define I2C_SLAVE_FROM_QDEV(dev) DO_UPCAST(i2c_slave, qdev, dev)
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58 | fe8de492 | Paul Brook | #define FROM_I2C_SLAVE(type, dev) DO_UPCAST(type, i2c, dev)
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59 | fe8de492 | Paul Brook | |
60 | 074f2fff | Gerd Hoffmann | void i2c_register_slave(I2CSlaveInfo *type);
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61 | fe8de492 | Paul Brook | |
62 | fe8de492 | Paul Brook | DeviceState *i2c_create_slave(i2c_bus *bus, const char *name, int addr); |
63 | fe8de492 | Paul Brook | |
64 | adb86c37 | balrog | /* max7310.c */
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65 | adb86c37 | balrog | void max7310_reset(i2c_slave *i2c);
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66 | adb86c37 | balrog | qemu_irq *max7310_gpio_in_get(i2c_slave *i2c); |
67 | adb86c37 | balrog | void max7310_gpio_out_set(i2c_slave *i2c, int line, qemu_irq handler); |
68 | adb86c37 | balrog | |
69 | adb86c37 | balrog | /* wm8750.c */
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70 | cdbe40ca | Paul Brook | void wm8750_data_req_set(DeviceState *dev,
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71 | adb86c37 | balrog | void (*data_req)(void *, int, int), void *opaque); |
72 | adb86c37 | balrog | void wm8750_dac_dat(void *opaque, uint32_t sample); |
73 | adb86c37 | balrog | uint32_t wm8750_adc_dat(void *opaque);
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74 | 662caa6f | balrog | void *wm8750_dac_buffer(void *opaque, int samples); |
75 | 662caa6f | balrog | void wm8750_dac_commit(void *opaque); |
76 | b0f74c87 | balrog | void wm8750_set_bclk_in(void *opaque, int new_hz); |
77 | adb86c37 | balrog | |
78 | 7e7c5e4c | balrog | /* tmp105.c */
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79 | 7e7c5e4c | balrog | void tmp105_set(i2c_slave *i2c, int temp); |
80 | 7e7c5e4c | balrog | |
81 | 1d4e547b | balrog | /* lm832x.c */
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82 | 2d9401aa | Paul Brook | void lm832x_key_event(i2c_slave *i2c, int key, int state); |
83 | 1d4e547b | balrog | |
84 | 0ff596d0 | pbrook | #endif |