| commit | fecf27a373f5a6b393e93b14f8460299b8abd6f9 | |
| author | Peter Hung <hpeter@gmail.com> | |
| Tue, 28 Jul 2015 03:59:24 +0000 (28 11:59 +0800) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Mon, 3 Aug 2015 22:40:29 +0000 (3 15:40 -0700) | ||
| tree | 2fa95934a7919f65f50e204cae7b92861bc0e662 | treesnapshot (tar.gz zip) |
| parent | a3a10ce3429e5dee623ad5c8407ea58e204fcb0a | commitdiff |
serial: 8250_pci: add RS485 for F81504/508/512
Add RS485 control for Fintek F81504/508/512
F81504/508/512 can control their RTS with H/W mode.
PCI configuration space for each port is 0x40 + idx * 8 + 7.
When it set with 0x01, it's configured with RS232 mode.
RTS is controlled by MCR.
When it set with 0x11, it's configured with RS485 mode.
RTS is controlled by H/W, RTS low with idle & RX, high with TX.
When it set with 0x31, it's configured with RS485 mode.
RTS is controlled by H/W, RTS high with idle & RX, low with TX.
We will force 0x01 on pci_fintek_setup().
Signed-off-by: Peter Hung <hpeter+linux_kernel@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add RS485 control for Fintek F81504/508/512
F81504/508/512 can control their RTS with H/W mode.
PCI configuration space for each port is 0x40 + idx * 8 + 7.
When it set with 0x01, it's configured with RS232 mode.
RTS is controlled by MCR.
When it set with 0x11, it's configured with RS485 mode.
RTS is controlled by H/W, RTS low with idle & RX, high with TX.
When it set with 0x31, it's configured with RS485 mode.
RTS is controlled by H/W, RTS high with idle & RX, low with TX.
We will force 0x01 on pci_fintek_setup().
Signed-off-by: Peter Hung <hpeter+linux_kernel@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| drivers/tty/serial/8250/8250_pci.c | diffblobblamehistory |