diff options
| author | Jiri Slaby <jslaby@suse.cz> | 2021-06-18 09:14:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-18 14:10:01 +0300 |
| commit | edb7d27cd10382b6fdb3af50873a04f108c4ee64 (patch) | |
| tree | 8b409e677f05585a763a2174c952107c7cf102cf /drivers/tty | |
| parent | 238d117d17516f92f5db958809ddec30731e9342 (diff) | |
| download | linux-edb7d27cd10382b6fdb3af50873a04f108c4ee64.tar.xz | |
mxser: dedup mxser_must_set_enhance_mode
There are multiple copies of setting the EFR register. Separate it to a
new universal function called __mxser_must_set_EFR. And use it in the
code by introducing mxser_must_set_enhance_mode instead of
mxser_disable_must_enchance_mode and mxser_enable_must_enchance_mode.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-41-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/mxser.c | 42 |
1 files changed, 22 insertions, 20 deletions
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index e082ae055c39..7caf369571f1 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -314,34 +314,24 @@ struct mxser_board { static struct mxser_board mxser_boards[MXSER_BOARDS]; static struct tty_driver *mxvar_sdriver; -static void mxser_enable_must_enchance_mode(unsigned long baseio) +static u8 __mxser_must_set_EFR(unsigned long baseio, u8 clear, u8 set, + bool restore_LCR) { - u8 oldlcr; - u8 efr; + u8 oldlcr, efr; oldlcr = inb(baseio + UART_LCR); outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); efr = inb(baseio + MOXA_MUST_EFR_REGISTER); - efr |= MOXA_MUST_EFR_EFRB_ENABLE; + efr &= ~clear; + efr |= set; outb(efr, baseio + MOXA_MUST_EFR_REGISTER); - outb(oldlcr, baseio + UART_LCR); -} - -static void mxser_disable_must_enchance_mode(unsigned long baseio) -{ - u8 oldlcr; - u8 efr; - - oldlcr = inb(baseio + UART_LCR); - outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); - efr = inb(baseio + MOXA_MUST_EFR_REGISTER); - efr &= ~MOXA_MUST_EFR_EFRB_ENABLE; + if (restore_LCR) + outb(oldlcr, baseio + UART_LCR); - outb(efr, baseio + MOXA_MUST_EFR_REGISTER); - outb(oldlcr, baseio + UART_LCR); + return oldlcr; } static void mxser_set_must_xon1_value(unsigned long baseio, u8 value) @@ -431,6 +421,18 @@ static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId) outb(oldlcr, baseio + UART_LCR); } +static void mxser_must_set_EFR(unsigned long baseio, u8 clear, u8 set) +{ + __mxser_must_set_EFR(baseio, clear, set, true); +} + +static void mxser_must_set_enhance_mode(unsigned long baseio, bool enable) +{ + mxser_must_set_EFR(baseio, + enable ? 0 : MOXA_MUST_EFR_EFRB_ENABLE, + enable ? MOXA_MUST_EFR_EFRB_ENABLE : 0); +} + static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio) { u8 oldlcr; @@ -514,7 +516,7 @@ static enum mxser_must_hwid mxser_must_get_hwid(unsigned long io) int i; outb(0, io + UART_LCR); - mxser_disable_must_enchance_mode(io); + mxser_must_set_enhance_mode(io, false); oldmcr = inb(io + UART_MCR); outb(0, io + UART_MCR); mxser_set_must_xon1_value(io, 0x11); @@ -2011,7 +2013,7 @@ static int mxser_initbrd(struct mxser_board *brd) /* Enhance mode enabled here */ if (brd->must_hwid != MOXA_OTHER_UART) - mxser_enable_must_enchance_mode(info->ioaddr); + mxser_must_set_enhance_mode(info->ioaddr, true); info->type = PORT_16550A; |