26 do { printf("smbus(%02x): " fmt , dev->i2c.address, ## __VA_ARGS__); } while (0)
29     fprintf(stderr, "%s: smbus: error: " fmt , qom_path, ## __VA_ARGS__); \
35     fprintf(stderr, "%s: smbus: error: " fmt , qom_path, ## __VA_ARGS__); \
44     SMBUS_CONFUSED = -1
52     if (sc->quick_cmd) {  in smbus_do_quick_cmd()
53         sc->quick_cmd(dev, recv);  in smbus_do_quick_cmd()
61     DPRINTF("Command %d len %d\n", dev->data_buf[0], dev->data_len);  in smbus_do_write()
62     if (sc->write_data) {  in smbus_do_write()
63         sc->write_data(dev, dev->data_buf, dev->data_len);  in smbus_do_write()
67 static int smbus_i2c_event(I2CSlave *s, enum i2c_event event)  in smbus_i2c_event()  argument
69     SMBusDevice *dev = SMBUS_DEVICE(s);  in smbus_i2c_event()
73         switch (dev->mode) {  in smbus_i2c_event()
76             dev->mode = SMBUS_WRITE_DATA;  in smbus_i2c_event()
80             BADF("Unexpected send start condition in state %d\n", dev->mode);  in smbus_i2c_event()
81             dev->mode = SMBUS_CONFUSED;  in smbus_i2c_event()
87         switch (dev->mode) {  in smbus_i2c_event()
89             DPRINTF("Read mode\n");  in smbus_i2c_event()
90             dev->mode = SMBUS_READ_DATA;  in smbus_i2c_event()
94             if (dev->data_len == 0) {  in smbus_i2c_event()
96                 dev->mode = SMBUS_CONFUSED;  in smbus_i2c_event()
99                 DPRINTF("Read mode\n");  in smbus_i2c_event()
100                 dev->mode = SMBUS_READ_DATA;  in smbus_i2c_event()
105             BADF("Unexpected recv start condition in state %d\n", dev->mode);  in smbus_i2c_event()
106             dev->mode = SMBUS_CONFUSED;  in smbus_i2c_event()
112         if (dev->data_len == 0) {  in smbus_i2c_event()
113             if (dev->mode == SMBUS_WRITE_DATA || dev->mode == SMBUS_READ_DATA) {  in smbus_i2c_event()
114                 smbus_do_quick_cmd(dev, dev->mode == SMBUS_READ_DATA);  in smbus_i2c_event()
117             switch (dev->mode) {  in smbus_i2c_event()
131         dev->mode = SMBUS_IDLE;  in smbus_i2c_event()
132         dev->data_len = 0;  in smbus_i2c_event()
136         switch (dev->mode) {  in smbus_i2c_event()
142             dev->mode = SMBUS_DONE;  in smbus_i2c_event()
146             BADF("Unexpected NACK in state %d\n", dev->mode);  in smbus_i2c_event()
147             dev->mode = SMBUS_CONFUSED;  in smbus_i2c_event()
153         return -1;  in smbus_i2c_event()
159 static uint8_t smbus_i2c_recv(I2CSlave *s)  in smbus_i2c_recv()  argument
161     SMBusDevice *dev = SMBUS_DEVICE(s);  in smbus_i2c_recv()
165     switch (dev->mode) {  in smbus_i2c_recv()
167         if (sc->receive_byte) {  in smbus_i2c_recv()
168             ret = sc->receive_byte(dev);  in smbus_i2c_recv()
174         BADF("Unexpected read in state %d\n", dev->mode);  in smbus_i2c_recv()
175         dev->mode = SMBUS_CONFUSED;  in smbus_i2c_recv()
182 static int smbus_i2c_send(I2CSlave *s, uint8_t data)  in smbus_i2c_send()  argument
184     SMBusDevice *dev = SMBUS_DEVICE(s);  in smbus_i2c_send()
186     switch (dev->mode) {  in smbus_i2c_send()
189         if (dev->data_len >= sizeof(dev->data_buf)) {  in smbus_i2c_send()
192             dev->data_buf[dev->data_len++] = data;  in smbus_i2c_send()
197         BADF("Unexpected write in state %d\n", dev->mode);  in smbus_i2c_send()
208     sc->event = smbus_i2c_event;  in smbus_device_class_init()
209     sc->recv = smbus_i2c_recv;  in smbus_device_class_init()
210     sc->send = smbus_i2c_send;  in smbus_device_class_init()
215     return dev->mode != SMBUS_IDLE;  in smbus_vmstate_needed()
224         VMSTATE_INT32(mode, SMBusDevice),