632d6abb8a
Reuse generic I2C functions that work for SMBus operations as well. Change-Id: I5a93f17b905de38752254891aa4347ba4ed3b205 Signed-off-by: Nico Huber <nico.huber@secunet.com> Reviewed-on: https://review.coreboot.org/20855 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
#ifndef DEVICE_SMBUS_H
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#define DEVICE_SMBUS_H
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#include <stdint.h>
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#include <device/device.h>
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#include <device/i2c_bus.h>
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#include <device/smbus_def.h>
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/* Common SMBus bus operations */
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struct smbus_bus_operations {
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int (*recv_byte)(device_t dev);
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int (*send_byte)(device_t dev, u8 value);
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int (*read_byte)(device_t dev, u8 addr);
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int (*write_byte)(device_t dev, u8 addr, u8 value);
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int (*block_read)(device_t dev, u8 cmd, u8 bytes, u8 *buffer);
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int (*block_write)(device_t dev, u8 cmd, u8 bytes, const u8 *buffer);
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};
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static inline const struct smbus_bus_operations *ops_smbus_bus(struct bus *bus)
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{
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const struct smbus_bus_operations *bops;
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bops = 0;
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if (bus && bus->dev && bus->dev->ops)
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bops = bus->dev->ops->ops_smbus_bus;
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return bops;
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}
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struct bus *get_pbus_smbus(device_t dev);
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int smbus_set_link(device_t dev);
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static inline int smbus_recv_byte(struct device *const dev)
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{
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return i2c_readb(dev);
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}
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static inline int smbus_send_byte(struct device *const dev, u8 byte)
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{
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return i2c_writeb(dev, byte);
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}
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static inline int smbus_read_byte(struct device *const dev, u8 addr)
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{
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return i2c_readb_at(dev, addr);
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}
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static inline int smbus_write_byte(struct device *const dev, u8 addr, u8 val)
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{
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return i2c_writeb_at(dev, addr, val);
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}
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int smbus_block_read(device_t dev, u8 cmd, u8 bytes, u8 *buffer);
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int smbus_block_write(device_t dev, u8 cmd, u8 bytes, const u8 *buffer);
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#if IS_ENABLED(CONFIG_SMBUS_HAS_AUX_CHANNELS)
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void smbus_switch_to_channel(uint8_t channel_number);
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uint8_t smbus_get_current_channel(void);
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#endif
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#endif /* DEVICE_SMBUS_H */
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