ipack/devices/ipoctal: add rx_enable flag
Thus, we don't enable RX when a termios setup has been called, as it could be
disabled previously.
As the control registers (Rx, Tx flags specifically) cannot be read from the
device, we keep this info in rx_enable.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c
index 34fcfce..8666d2d 100644
--- a/drivers/ipack/devices/ipoctal.c
+++ b/drivers/ipack/devices/ipoctal.c
@@ -43,6 +43,7 @@
unsigned int board_id;
u8 isr_rx_rdy_mask;
u8 isr_tx_rdy_mask;
+ unsigned int rx_enable;
};
struct ipoctal {
@@ -65,6 +66,7 @@
* there is something to send
*/
iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);
+ channel->rx_enable = 1;
return 0;
}
@@ -309,6 +311,7 @@
}
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 @@
/* 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 @@
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 @@
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);