diff options
Diffstat (limited to 'drivers/i2c/davinci_i2c.h')
| -rw-r--r-- | drivers/i2c/davinci_i2c.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/drivers/i2c/davinci_i2c.h b/drivers/i2c/davinci_i2c.h new file mode 100644 index 0000000..20d4342 --- /dev/null +++ b/drivers/i2c/davinci_i2c.h @@ -0,0 +1,78 @@ +/* + * (C) Copyright 2004-2014 + * Texas Instruments, <www.ti.com> + * + * Some changes copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net> + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#ifndef _DAVINCI_I2C_H_ +#define _DAVINCI_I2C_H_ + +#define I2C_WRITE 0 +#define I2C_READ 1 + +struct i2c_regs { + u32 i2c_oa; + u32 i2c_ie; + u32 i2c_stat; + u32 i2c_scll; + u32 i2c_sclh; + u32 i2c_cnt; + u32 i2c_drr; + u32 i2c_sa; + u32 i2c_dxr; + u32 i2c_con; + u32 i2c_iv; + u32 res_2c; + u32 i2c_psc; +}; + +/* I2C masks */ + +/* I2C Interrupt Enable Register (I2C_IE): */ +#define I2C_IE_SCD_IE (1 << 5) /* Stop condition detect interrupt enable */ +#define I2C_IE_XRDY_IE (1 << 4) /* Transmit data ready interrupt enable */ +#define I2C_IE_RRDY_IE (1 << 3) /* Receive data ready interrupt enable */ +#define I2C_IE_ARDY_IE (1 << 2) /* Register access ready interrupt enable */ +#define I2C_IE_NACK_IE (1 << 1) /* No acknowledgment interrupt enable */ +#define I2C_IE_AL_IE (1 << 0) /* Arbitration lost interrupt enable */ + +/* I2C Status Register (I2C_STAT): */ + +#define I2C_STAT_BB (1 << 12) /* Bus busy */ +#define I2C_STAT_ROVR (1 << 11) /* Receive overrun */ +#define I2C_STAT_XUDF (1 << 10) /* Transmit underflow */ +#define I2C_STAT_AAS (1 << 9) /* Address as slave */ +#define I2C_STAT_SCD (1 << 5) /* Stop condition detect */ +#define I2C_STAT_XRDY (1 << 4) /* Transmit data ready */ +#define I2C_STAT_RRDY (1 << 3) /* Receive data ready */ +#define I2C_STAT_ARDY (1 << 2) /* Register access ready */ +#define I2C_STAT_NACK (1 << 1) /* No acknowledgment interrupt enable */ +#define I2C_STAT_AL (1 << 0) /* Arbitration lost interrupt enable */ + +/* I2C Interrupt Code Register (I2C_INTCODE): */ + +#define I2C_INTCODE_MASK 7 +#define I2C_INTCODE_NONE 0 +#define I2C_INTCODE_AL 1 /* Arbitration lost */ +#define I2C_INTCODE_NAK 2 /* No acknowledgement/general call */ +#define I2C_INTCODE_ARDY 3 /* Register access ready */ +#define I2C_INTCODE_RRDY 4 /* Rcv data ready */ +#define I2C_INTCODE_XRDY 5 /* Xmit data ready */ +#define I2C_INTCODE_SCD 6 /* Stop condition detect */ + +/* I2C Configuration Register (I2C_CON): */ + +#define I2C_CON_EN (1 << 5) /* I2C module enable */ +#define I2C_CON_STB (1 << 4) /* Start byte mode (master mode only) */ +#define I2C_CON_MST (1 << 10) /* Master/slave mode */ +#define I2C_CON_TRX (1 << 9) /* Tx/Rx mode (master mode only) */ +#define I2C_CON_XA (1 << 8) /* Expand address */ +#define I2C_CON_STP (1 << 11) /* Stop condition (master mode only) */ +#define I2C_CON_STT (1 << 13) /* Start condition (master mode only) */ +#define I2C_CON_FREE (1 << 14) /* Free run on emulation */ + +#define I2C_TIMEOUT 0xffff0000 /* Timeout mask for poll_i2c_irq() */ + +#endif |