diff options
Diffstat (limited to 'drivers/ipack')
| -rw-r--r-- | drivers/ipack/devices/ipoctal.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c index 34fcfce0cdd9..8666d2d05eef 100644 --- a/drivers/ipack/devices/ipoctal.c +++ b/drivers/ipack/devices/ipoctal.c @@ -43,6 +43,7 @@ struct ipoctal_channel { unsigned int board_id; u8 isr_rx_rdy_mask; u8 isr_tx_rdy_mask; + unsigned int rx_enable; }; struct ipoctal { @@ -65,6 +66,7 @@ static int ipoctal_port_activate(struct tty_port *port, struct tty_struct *tty) * there is something to send */ iowrite8(CR_ENABLE_RX, &channel->regs->w.cr); + channel->rx_enable = 1; return 0; } @@ -309,6 +311,7 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr, } iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr); + channel->rx_enable = 0; iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr); iowrite8(CR_CMD_RESET_TX, &channel->regs->w.cr); iowrite8(MR1_CHRL_8_BITS | MR1_ERROR_CHAR | MR1_RxINT_RxRDY, @@ -430,6 +433,7 @@ static int ipoctal_write_tty(struct tty_struct *tty, /* As the IP-OCTAL 485 only supports half duplex, do it manually */ if (channel->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) { iowrite8(CR_DISABLE_RX, &channel->regs->w.cr); + channel->rx_enable = 0; iowrite8(CR_CMD_ASSERT_RTSN, &channel->regs->w.cr); } @@ -589,8 +593,9 @@ static void ipoctal_set_termios(struct tty_struct *tty, iowrite8(mr2, &channel->regs->w.mr); iowrite8(csr, &channel->regs->w.csr); - /* Enable again the RX */ - iowrite8(CR_ENABLE_RX, &channel->regs->w.cr); + /* Enable again the RX, if it was before */ + if (channel->rx_enable) + iowrite8(CR_ENABLE_RX, &channel->regs->w.cr); } static void ipoctal_hangup(struct tty_struct *tty) @@ -610,6 +615,7 @@ static void ipoctal_hangup(struct tty_struct *tty) tty_port_hangup(&channel->tty_port); iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr); + channel->rx_enable = 0; iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr); iowrite8(CR_CMD_RESET_TX, &channel->regs->w.cr); iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr); |