75bd3009d3
Many i2c device drivers used similar code to access registers on the ICs they drive. This commit implements that functionality in libi2cdriver and updates the drivers to use the library instead of their own register access functions. The net result is 375+ fewer lines of code and less work for people developing new drivers. The two exceptions were cat24c256 and parts of tda19988. They access the bus in uncommon ways. It doesn't make sense at this time to move their read/write functions into libi2cdriver. Change-Id: Id8280b71af33b710a49944d7f20a7262be9f5988
33 lines
1.4 KiB
C
33 lines
1.4 KiB
C
/* Prototypes and definitions for i2c drivers. */
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#ifndef _MINIX_I2CDRIVER_H
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#define _MINIX_I2CDRIVER_H
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#include <minix/endpoint.h>
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#include <minix/i2c.h>
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#include <minix/ipc.h>
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/* Functions defined by i2cdriver.c: */
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int i2cdriver_env_parse(uint32_t * bus, i2c_addr_t * address,
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i2c_addr_t * valid_addrs);
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void i2cdriver_announce(uint32_t bus);
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endpoint_t i2cdriver_bus_endpoint(uint32_t bus);
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int i2cdriver_subscribe_bus_updates(uint32_t bus);
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void i2cdriver_handle_bus_update(endpoint_t * bus_endpoint, uint32_t bus,
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i2c_addr_t address);
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int i2cdriver_reserve_device(endpoint_t bus_endpoint, i2c_addr_t address);
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int i2cdriver_exec(endpoint_t bus_endpoint, minix_i2c_ioctl_exec_t *ioctl_exec);
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int i2creg_raw_read8(endpoint_t bus, i2c_addr_t addr, uint8_t * val);
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int i2creg_read8(endpoint_t bus, i2c_addr_t addr, uint8_t reg, uint8_t * val);
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int i2creg_read16(endpoint_t bus, i2c_addr_t addr, uint8_t reg, uint16_t * val);
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int i2creg_read24(endpoint_t bus, i2c_addr_t addr, uint8_t reg, uint32_t * val);
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int i2creg_raw_write8(endpoint_t bus, i2c_addr_t addr, uint8_t val);
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int i2creg_write8(endpoint_t bus, i2c_addr_t addr, uint8_t reg, uint8_t val);
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int i2creg_set_bits8(endpoint_t bus, i2c_addr_t addr, uint8_t reg,
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uint8_t bits);
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int i2creg_clear_bits8(endpoint_t bus, i2c_addr_t addr, uint8_t reg,
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uint8_t bits);
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#endif /* _MINIX_I2CDRIVER_H */
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