diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-at91.h')
| -rw-r--r-- | drivers/i2c/busses/i2c-at91.h | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-at91.h b/drivers/i2c/busses/i2c-at91.h index 636447498b41..be0e7afda529 100644 --- a/drivers/i2c/busses/i2c-at91.h +++ b/drivers/i2c/busses/i2c-at91.h @@ -49,6 +49,10 @@ #define AT91_TWI_IADRSZ_1 0x0100 /* Internal Device Address Size */ #define AT91_TWI_MREAD BIT(12) /* Master Read Direction */ +#define AT91_TWI_SMR 0x0008 /* Slave Mode Register */ +#define AT91_TWI_SMR_SADR_MAX 0x007f +#define AT91_TWI_SMR_SADR(x) (((x) & AT91_TWI_SMR_SADR_MAX) << 16) + #define AT91_TWI_IADR 0x000c /* Internal Address Register */ #define AT91_TWI_CWGR 0x0010 /* Clock Waveform Generator Reg */ @@ -59,13 +63,17 @@ #define AT91_TWI_TXCOMP BIT(0) /* Transmission Complete */ #define AT91_TWI_RXRDY BIT(1) /* Receive Holding Register Ready */ #define AT91_TWI_TXRDY BIT(2) /* Transmit Holding Register Ready */ +#define AT91_TWI_SVREAD BIT(3) /* Slave Read */ +#define AT91_TWI_SVACC BIT(4) /* Slave Access */ #define AT91_TWI_OVRE BIT(6) /* Overrun Error */ #define AT91_TWI_UNRE BIT(7) /* Underrun Error */ #define AT91_TWI_NACK BIT(8) /* Not Acknowledged */ +#define AT91_TWI_EOSACC BIT(11) /* End Of Slave Access */ #define AT91_TWI_LOCK BIT(23) /* TWI Lock due to Frame Errors */ #define AT91_TWI_INT_MASK \ - (AT91_TWI_TXCOMP | AT91_TWI_RXRDY | AT91_TWI_TXRDY | AT91_TWI_NACK) + (AT91_TWI_TXCOMP | AT91_TWI_RXRDY | AT91_TWI_TXRDY | AT91_TWI_NACK \ + | AT91_TWI_SVACC | AT91_TWI_EOSACC) #define AT91_TWI_IER 0x0024 /* Interrupt Enable Register */ #define AT91_TWI_IDR 0x0028 /* Interrupt Disable Register */ @@ -133,6 +141,11 @@ struct at91_twi_dev { bool recv_len_abort; u32 fifo_size; struct at91_twi_dma dma; + bool slave_detected; +#ifdef CONFIG_I2C_AT91_SLAVE_EXPERIMENTAL + unsigned smr; + struct i2c_client *slave; +#endif }; unsigned at91_twi_read(struct at91_twi_dev *dev, unsigned reg); @@ -145,3 +158,18 @@ void at91_init_twi_bus(struct at91_twi_dev *dev); void at91_init_twi_bus_master(struct at91_twi_dev *dev); int at91_twi_probe_master(struct platform_device *pdev, u32 phy_addr, struct at91_twi_dev *dev); + +#ifdef CONFIG_I2C_AT91_SLAVE_EXPERIMENTAL +void at91_init_twi_bus_slave(struct at91_twi_dev *dev); +int at91_twi_probe_slave(struct platform_device *pdev, u32 phy_addr, + struct at91_twi_dev *dev); + +#else +static inline void at91_init_twi_bus_slave(struct at91_twi_dev *dev) {} +static inline int at91_twi_probe_slave(struct platform_device *pdev, + u32 phy_addr, struct at91_twi_dev *dev) +{ + return -EINVAL; +} + +#endif |