diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/serial_ks8695.c | 61 |
1 files changed, 52 insertions, 9 deletions
diff --git a/drivers/serial/serial_ks8695.c b/drivers/serial/serial_ks8695.c index b9cbfc87f61..998e89dc5aa 100644 --- a/drivers/serial/serial_ks8695.c +++ b/drivers/serial/serial_ks8695.c @@ -63,8 +63,44 @@ #define UART_DUMMY_LSR_RX 0x100 #define UART_PORT_SIZE (KS8695_USR - KS8695_URRB + 4) -#define tx_enabled(port) ((port)->unused[0]) -#define rx_enabled(port) ((port)->unused[1]) +static inline int tx_enabled(struct uart_port *port) +{ + return port->unused[0] & 1; +} + +static inline int rx_enabled(struct uart_port *port) +{ + return port->unused[0] & 2; +} + +static inline int ms_enabled(struct uart_port *port) +{ + return port->unused[0] & 4; +} + +static inline void ms_enable(struct uart_port *port, int enabled) +{ + if(enabled) + port->unused[0] |= 4; + else + port->unused[0] &= ~4; +} + +static inline void rx_enable(struct uart_port *port, int enabled) +{ + if(enabled) + port->unused[0] |= 2; + else + port->unused[0] &= ~2; +} + +static inline void tx_enable(struct uart_port *port, int enabled) +{ + if(enabled) + port->unused[0] |= 1; + else + port->unused[0] &= ~1; +} #ifdef SUPPORT_SYSRQ @@ -75,7 +111,7 @@ static void ks8695uart_stop_tx(struct uart_port *port) { if (tx_enabled(port)) { disable_irq(KS8695_IRQ_UART_TX); - tx_enabled(port) = 0; + tx_enable(port, 0); } } @@ -83,7 +119,7 @@ static void ks8695uart_start_tx(struct uart_port *port) { if (!tx_enabled(port)) { enable_irq(KS8695_IRQ_UART_TX); - tx_enabled(port) = 1; + tx_enable(port, 1); } } @@ -91,18 +127,24 @@ static void ks8695uart_stop_rx(struct uart_port *port) { if (rx_enabled(port)) { disable_irq(KS8695_IRQ_UART_RX); - rx_enabled(port) = 0; + rx_enable(port, 0); } } static void ks8695uart_enable_ms(struct uart_port *port) { - enable_irq(KS8695_IRQ_UART_MODEM_STATUS); + if (!ms_enabled(port)) { + enable_irq(KS8695_IRQ_UART_MODEM_STATUS); + ms_enable(port,1); + } } static void ks8695uart_disable_ms(struct uart_port *port) { - disable_irq(KS8695_IRQ_UART_MODEM_STATUS); + if (ms_enabled(port)) { + disable_irq(KS8695_IRQ_UART_MODEM_STATUS); + ms_enable(port,0); + } } static irqreturn_t ks8695uart_rx_chars(int irq, void *dev_id) @@ -285,8 +327,9 @@ static int ks8695uart_startup(struct uart_port *port) int retval; set_irq_flags(KS8695_IRQ_UART_TX, IRQF_VALID | IRQF_NOAUTOEN); - tx_enabled(port) = 0; - rx_enabled(port) = 1; + tx_enable(port, 0); + rx_enable(port, 1); + ms_enable(port, 1); /* * Allocate the IRQ |