diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c index 05080c449c6b..13ea1c29873d 100644 --- a/drivers/i2c/busses/i2c-bfin-twi.c +++ b/drivers/i2c/busses/i2c-bfin-twi.c @@ -39,33 +39,40 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface, unsigned short mast_stat = read_MASTER_STAT(iface); if (twi_int_status & XMTSERV) { + if (iface->writeNum <= 0) { + /* start receive immediately after complete sending in + * combine mode. + */ + if (iface->cur_mode == TWI_I2C_MODE_COMBINED) + write_MASTER_CTL(iface, + read_MASTER_CTL(iface) | MDIR); + else if (iface->manual_stop) + write_MASTER_CTL(iface, + read_MASTER_CTL(iface) | STOP); + else if (iface->cur_mode == TWI_I2C_MODE_REPEAT && + 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) | + MDIR); + else + write_MASTER_CTL(iface, + read_MASTER_CTL(iface) & + ~MDIR); + } + } /* Transmit next data */ - if (iface->writeNum > 0) { + while (iface->writeNum > 0 && + (read_FIFO_STAT(iface) & XMTSTAT) != XMT_FULL) { SSYNC(); write_XMT_DATA8(iface, *(iface->transPtr++)); iface->writeNum--; } - /* start receive immediately after complete sending in - * combine mode. - */ - else if (iface->cur_mode == TWI_I2C_MODE_COMBINED) - write_MASTER_CTL(iface, - read_MASTER_CTL(iface) | MDIR); - else if (iface->manual_stop) - write_MASTER_CTL(iface, - read_MASTER_CTL(iface) | STOP); - else if (iface->cur_mode == TWI_I2C_MODE_REPEAT && - 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) | MDIR); - else - write_MASTER_CTL(iface, - read_MASTER_CTL(iface) & ~MDIR); - } } if (twi_int_status & RCVSERV) { - if (iface->readNum > 0) { + while (iface->readNum > 0 && + (read_FIFO_STAT(iface) & RCVSTAT)) { /* Receive next data */ *(iface->transPtr) = read_RCV_DATA8(iface); if (iface->cur_mode == TWI_I2C_MODE_COMBINED) {