1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #ifndef DEVICE_SMBUS_H
4 #define DEVICE_SMBUS_H
5
6 #include <stdint.h>
7 #include <device/device.h>
8 #include <device/i2c_bus.h>
9
10 /* Common SMBus bus operations */
11 struct smbus_bus_operations {
12 int (*recv_byte)(struct device *dev);
13 int (*send_byte)(struct device *dev, u8 value);
14 int (*read_byte)(struct device *dev, u8 addr);
15 int (*write_byte)(struct device *dev, u8 addr, u8 value);
16 int (*block_read)(struct device *dev, u8 cmd, u8 bytes, u8 *buffer);
17 int (*block_write)(struct device *dev, u8 cmd, u8 bytes,
18 const u8 *buffer);
19 };
20
ops_smbus_bus(struct bus * bus)21 static inline const struct smbus_bus_operations *ops_smbus_bus(struct bus *bus)
22 {
23 const struct smbus_bus_operations *bops;
24
25 bops = 0;
26 if (bus && bus->dev && bus->dev->ops)
27 bops = bus->dev->ops->ops_smbus_bus;
28
29 return bops;
30 }
31
32 struct bus *get_pbus_smbus(struct device *dev);
33
34 #if !DEVTREE_EARLY
smbus_recv_byte(struct device * const dev)35 static inline int smbus_recv_byte(struct device *const dev)
36 {
37 return i2c_dev_readb(dev);
38 }
39
smbus_send_byte(struct device * const dev,u8 byte)40 static inline int smbus_send_byte(struct device *const dev, u8 byte)
41 {
42 return i2c_dev_writeb(dev, byte);
43 }
44
smbus_read_byte(struct device * const dev,u8 addr)45 static inline int smbus_read_byte(struct device *const dev, u8 addr)
46 {
47 return i2c_dev_readb_at(dev, addr);
48 }
49
smbus_write_byte(struct device * const dev,u8 addr,u8 val)50 static inline int smbus_write_byte(struct device *const dev, u8 addr, u8 val)
51 {
52 return i2c_dev_writeb_at(dev, addr, val);
53 }
54
55 int smbus_block_read(struct device *dev, u8 cmd, u8 bytes, u8 *buffer);
56 int smbus_block_write(struct device *dev, u8 cmd, u8 bytes, const u8 *buffer);
57 #endif
58
59 #endif /* DEVICE_SMBUS_H */
60