diff options
| author | Stefan Roese <sr@denx.de> | 2019-06-13 18:45:41 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-18 10:36:56 +0300 |
| commit | 42912081481c6303d880f315223f725ee813c8f1 (patch) | |
| tree | c3955ae65339c32ecb94dade32a12ea6711af7f5 /drivers/tty/serial/8250/8250.h | |
| parent | 7e267b2956f122b3b86c09447e8791727f9d2624 (diff) | |
| download | linux-42912081481c6303d880f315223f725ee813c8f1.tar.xz | |
serial: 8250: Add MSR/MCR TIOCM conversion wrapper functions
This patch adds wrapper functions to convert MSR <-> TIOCM and also
MCR <-> TIOCM. These functions are used now in serial8250_do_set_mctrl()
and serial8250_do_get_mctrl().
Signed-off-by: Stefan Roese <sr@denx.de>
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Yegor Yefremov <yegorslists@googlemail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Giulio Benetti <giulio.benetti@micronovasrl.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/8250/8250.h')
| -rw-r--r-- | drivers/tty/serial/8250/8250.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h index 93756ea540d6..57db8c1689af 100644 --- a/drivers/tty/serial/8250/8250.h +++ b/drivers/tty/serial/8250/8250.h @@ -157,6 +157,60 @@ void serial8250_rpm_put_tx(struct uart_8250_port *p); int serial8250_em485_init(struct uart_8250_port *p); void serial8250_em485_destroy(struct uart_8250_port *p); +/* MCR <-> TIOCM conversion */ +static inline int serial8250_TIOCM_to_MCR(int tiocm) +{ + int mcr = 0; + + if (tiocm & TIOCM_RTS) + mcr |= UART_MCR_RTS; + if (tiocm & TIOCM_DTR) + mcr |= UART_MCR_DTR; + if (tiocm & TIOCM_OUT1) + mcr |= UART_MCR_OUT1; + if (tiocm & TIOCM_OUT2) + mcr |= UART_MCR_OUT2; + if (tiocm & TIOCM_LOOP) + mcr |= UART_MCR_LOOP; + + return mcr; +} + +static inline int serial8250_MCR_to_TIOCM(int mcr) +{ + int tiocm = 0; + + if (mcr & UART_MCR_RTS) + tiocm |= TIOCM_RTS; + if (mcr & UART_MCR_DTR) + tiocm |= TIOCM_DTR; + if (mcr & UART_MCR_OUT1) + tiocm |= TIOCM_OUT1; + if (mcr & UART_MCR_OUT2) + tiocm |= TIOCM_OUT2; + if (mcr & UART_MCR_LOOP) + tiocm |= TIOCM_LOOP; + + return tiocm; +} + +/* MSR <-> TIOCM conversion */ +static inline int serial8250_MSR_to_TIOCM(int msr) +{ + int tiocm = 0; + + if (msr & UART_MSR_DCD) + tiocm |= TIOCM_CAR; + if (msr & UART_MSR_RI) + tiocm |= TIOCM_RNG; + if (msr & UART_MSR_DSR) + tiocm |= TIOCM_DSR; + if (msr & UART_MSR_CTS) + tiocm |= TIOCM_CTS; + + return tiocm; +} + static inline void serial8250_out_MCR(struct uart_8250_port *up, int value) { serial_out(up, UART_MCR, value); |