diff options
Diffstat (limited to 'drivers/i2c/busses')
| -rw-r--r-- | drivers/i2c/busses/i2c-bfin-twi.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c index 71be486a224..2288e1bcf01 100644 --- a/drivers/i2c/busses/i2c-bfin-twi.c +++ b/drivers/i2c/busses/i2c-bfin-twi.c @@ -99,7 +99,7 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface, */ else if (iface->cur_mode == TWI_I2C_MODE_COMBINED) write_MASTER_CTL(iface, - read_MASTER_CTL(iface) | MDIR | RSTART); + read_MASTER_CTL(iface) | MDIR); else if (iface->manual_stop) write_MASTER_CTL(iface, read_MASTER_CTL(iface) | STOP); @@ -107,10 +107,10 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface, iface->cur_msg + 1 < iface->msg_num) { if (iface->pmsg[iface->cur_msg + 1].flags & I2C_M_RD) write_MASTER_CTL(iface, - read_MASTER_CTL(iface) | RSTART | MDIR); + read_MASTER_CTL(iface) | MDIR); else write_MASTER_CTL(iface, - (read_MASTER_CTL(iface) | RSTART) & ~MDIR); + read_MASTER_CTL(iface) & ~MDIR); } } if (twi_int_status & RCVSERV) { @@ -144,10 +144,10 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface, iface->cur_msg + 1 < iface->msg_num) { if (iface->pmsg[iface->cur_msg + 1].flags & I2C_M_RD) write_MASTER_CTL(iface, - read_MASTER_CTL(iface) | RSTART | MDIR); + read_MASTER_CTL(iface) | MDIR); else write_MASTER_CTL(iface, - (read_MASTER_CTL(iface) | RSTART) & ~MDIR); + read_MASTER_CTL(iface) & ~MDIR); } } } @@ -230,7 +230,7 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface, write_MASTER_CTL(iface, read_MASTER_CTL(iface) & ~RSTART); } else if (iface->cur_mode == TWI_I2C_MODE_REPEAT && - iface->cur_msg+1 < iface->msg_num) { + iface->cur_msg + 1 < iface->msg_num) { iface->cur_msg++; iface->transPtr = iface->pmsg[iface->cur_msg].buf; iface->writeNum = iface->readNum = @@ -262,9 +262,10 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface, (0xff << 6))); iface->manual_stop = 1; } - /* remove restart bit and enable master receive */ - write_MASTER_CTL(iface, - read_MASTER_CTL(iface) & ~RSTART); + /* remove restart bit before last message */ + if (iface->cur_msg + 1 == iface->msg_num) + write_MASTER_CTL(iface, + read_MASTER_CTL(iface) & ~RSTART); } else { iface->result = 1; write_INT_MASK(iface, 0); @@ -321,7 +322,8 @@ static int bfin_twi_do_master_xfer(struct i2c_adapter *adap, return -EINVAL; } - iface->cur_mode = TWI_I2C_MODE_REPEAT; + if (iface->msg_num > 1) + iface->cur_mode = TWI_I2C_MODE_REPEAT; iface->manual_stop = 0; iface->transPtr = pmsg->buf; iface->writeNum = iface->readNum = pmsg->len; @@ -366,6 +368,7 @@ static int bfin_twi_do_master_xfer(struct i2c_adapter *adap, /* Master enable */ write_MASTER_CTL(iface, read_MASTER_CTL(iface) | MEN | + (iface->msg_num > 1 ? RSTART : 0) | ((iface->read_write == I2C_SMBUS_READ) ? MDIR : 0) | ((CONFIG_I2C_BLACKFIN_TWI_CLK_KHZ > 100) ? FAST : 0)); SSYNC(); @@ -530,7 +533,7 @@ int bfin_twi_do_smbus_xfer(struct i2c_adapter *adap, u16 addr, else write_MASTER_CTL(iface, 0x1 << 6); /* Master enable */ - write_MASTER_CTL(iface, read_MASTER_CTL(iface) | MEN | + write_MASTER_CTL(iface, read_MASTER_CTL(iface) | MEN | RSTART | ((CONFIG_I2C_BLACKFIN_TWI_CLK_KHZ>100) ? FAST : 0)); break; default: |