19 int smbus_quick_command(I2CBus *bus, uint8_t addr, int read)  in smbus_quick_command()  argument
21     if (i2c_start_transfer(bus, addr, read)) {  in smbus_quick_command()
22         return -1;  in smbus_quick_command()
24     i2c_end_transfer(bus);  in smbus_quick_command()
28 int smbus_receive_byte(I2CBus *bus, uint8_t addr)  in smbus_receive_byte()  argument
32     if (i2c_start_recv(bus, addr)) {  in smbus_receive_byte()
33         return -1;  in smbus_receive_byte()
35     data = i2c_recv(bus);  in smbus_receive_byte()
36     i2c_nack(bus);  in smbus_receive_byte()
37     i2c_end_transfer(bus);  in smbus_receive_byte()
41 int smbus_send_byte(I2CBus *bus, uint8_t addr, uint8_t data)  in smbus_send_byte()  argument
43     if (i2c_start_send(bus, addr)) {  in smbus_send_byte()
44         return -1;  in smbus_send_byte()
46     i2c_send(bus, data);  in smbus_send_byte()
47     i2c_end_transfer(bus);  in smbus_send_byte()
51 int smbus_read_byte(I2CBus *bus, uint8_t addr, uint8_t command)  in smbus_read_byte()  argument
54     if (i2c_start_send(bus, addr)) {  in smbus_read_byte()
55         return -1;  in smbus_read_byte()
57     i2c_send(bus, command);  in smbus_read_byte()
58     if (i2c_start_recv(bus, addr)) {  in smbus_read_byte()
59         i2c_end_transfer(bus);  in smbus_read_byte()
60         return -1;  in smbus_read_byte()
62     data = i2c_recv(bus);  in smbus_read_byte()
63     i2c_nack(bus);  in smbus_read_byte()
64     i2c_end_transfer(bus);  in smbus_read_byte()
68 int smbus_write_byte(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t data)  in smbus_write_byte()  argument
70     if (i2c_start_send(bus, addr)) {  in smbus_write_byte()
71         return -1;  in smbus_write_byte()
73     i2c_send(bus, command);  in smbus_write_byte()
74     i2c_send(bus, data);  in smbus_write_byte()
75     i2c_end_transfer(bus);  in smbus_write_byte()
79 int smbus_read_word(I2CBus *bus, uint8_t addr, uint8_t command)  in smbus_read_word()  argument
82     if (i2c_start_send(bus, addr)) {  in smbus_read_word()
83         return -1;  in smbus_read_word()
85     i2c_send(bus, command);  in smbus_read_word()
86     if (i2c_start_recv(bus, addr)) {  in smbus_read_word()
87         i2c_end_transfer(bus);  in smbus_read_word()
88         return -1;  in smbus_read_word()
90     data = i2c_recv(bus);  in smbus_read_word()
91     data |= i2c_recv(bus) << 8;  in smbus_read_word()
92     i2c_nack(bus);  in smbus_read_word()
93     i2c_end_transfer(bus);  in smbus_read_word()
97 int smbus_write_word(I2CBus *bus, uint8_t addr, uint8_t command, uint16_t data)  in smbus_write_word()  argument
99     if (i2c_start_send(bus, addr)) {  in smbus_write_word()
100         return -1;  in smbus_write_word()
102     i2c_send(bus, command);  in smbus_write_word()
103     i2c_send(bus, data & 0xff);  in smbus_write_word()
104     i2c_send(bus, data >> 8);  in smbus_write_word()
105     i2c_end_transfer(bus);  in smbus_write_word()
109 int smbus_read_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,  in smbus_read_block()  argument
116         if (i2c_start_send(bus, addr)) {  in smbus_read_block()
117             return -1;  in smbus_read_block()
119         i2c_send(bus, command);  in smbus_read_block()
121     if (i2c_start_recv(bus, addr)) {  in smbus_read_block()
123             i2c_end_transfer(bus);  in smbus_read_block()
125         return -1;  in smbus_read_block()
128         rlen = i2c_recv(bus);  in smbus_read_block()
136         data[i] = i2c_recv(bus);  in smbus_read_block()
138     i2c_nack(bus);  in smbus_read_block()
139     i2c_end_transfer(bus);  in smbus_read_block()
143 int smbus_write_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,  in smbus_write_block()  argument
152     if (i2c_start_send(bus, addr)) {  in smbus_write_block()
153         return -1;  in smbus_write_block()
155     i2c_send(bus, command);  in smbus_write_block()
157         i2c_send(bus, len);  in smbus_write_block()
160         i2c_send(bus, data[i]);  in smbus_write_block()
162     i2c_end_transfer(bus);  in smbus_write_block()