diff options
Diffstat (limited to 'drivers/tty/serial/samsung.c')
| -rw-r--r-- | drivers/tty/serial/samsung.c | 48 |
1 files changed, 42 insertions, 6 deletions
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 1e0d9b8c48c9..ee7c37502d30 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -85,6 +85,42 @@ static void dbg(const char *fmt, ...) #define S3C24XX_TX_DMA 2 #define S3C24XX_RX_PIO 1 #define S3C24XX_RX_DMA 2 + +#ifndef CONFIG_CPU_BIG_ENDIAN /* little endian */ +static inline void __hw_set_bit(int nr, volatile unsigned long *addr) +{ + __set_bit(nr, addr); +} + +static inline void __hw_clear_bit(int nr, volatile unsigned long *addr) +{ + __clear_bit(nr, addr); +} +#else +static inline void __hw_set_bit(int nr, volatile unsigned long *addr) +{ + unsigned long mask = BIT_MASK(nr); + unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr); + unsigned long val = le32_to_cpu(*p); + + val |= mask; + + *p = cpu_to_le32(val); +} + +static inline void __hw_clear_bit(int nr, volatile unsigned long *addr) +{ + unsigned long mask = BIT_MASK(nr); + unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr); + + unsigned long val = le32_to_cpu(*p); + + val &= ~mask; + + *p = cpu_to_le32(val); +} +#endif + /* macros to change one thing to another */ #define tx_enabled(port) ((port)->unused[0]) @@ -170,7 +206,7 @@ static void s3c24xx_serial_stop_tx(struct uart_port *port) return; if (s3c24xx_serial_has_interrupt_mask(port)) - __set_bit(S3C64XX_UINTM_TXD, + __hw_set_bit(S3C64XX_UINTM_TXD, portaddrl(port, S3C64XX_UINTM)); else disable_irq_nosync(ourport->tx_irq); @@ -236,7 +272,7 @@ static void enable_tx_dma(struct s3c24xx_uart_port *ourport) /* Mask Tx interrupt */ if (s3c24xx_serial_has_interrupt_mask(port)) - __set_bit(S3C64XX_UINTM_TXD, + __hw_set_bit(S3C64XX_UINTM_TXD, portaddrl(port, S3C64XX_UINTM)); else disable_irq_nosync(ourport->tx_irq); @@ -270,7 +306,7 @@ static void enable_tx_pio(struct s3c24xx_uart_port *ourport) /* Unmask Tx interrupt */ if (s3c24xx_serial_has_interrupt_mask(port)) - __clear_bit(S3C64XX_UINTM_TXD, + __hw_clear_bit(S3C64XX_UINTM_TXD, portaddrl(port, S3C64XX_UINTM)); else enable_irq(ourport->tx_irq); @@ -424,7 +460,7 @@ static void s3c24xx_serial_stop_rx(struct uart_port *port) if (rx_enabled(port)) { dbg("s3c24xx_serial_stop_rx: port=%p\n", port); if (s3c24xx_serial_has_interrupt_mask(port)) - __set_bit(S3C64XX_UINTM_RXD, + __hw_set_bit(S3C64XX_UINTM_RXD, portaddrl(port, S3C64XX_UINTM)); else disable_irq_nosync(ourport->rx_irq); @@ -792,7 +828,7 @@ static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id) if (uart_circ_empty(xmit)) s3c24xx_serial_stop_tx(port); -out: + out: spin_unlock_irqrestore(&port->lock, flags); return IRQ_HANDLED; } @@ -1086,7 +1122,7 @@ static int s3c64xx_serial_startup(struct uart_port *port) spin_unlock_irqrestore(&port->lock, flags); /* Enable Rx Interrupt */ - __clear_bit(S3C64XX_UINTM_RXD, portaddrl(port, S3C64XX_UINTM)); + __hw_clear_bit(S3C64XX_UINTM_RXD, portaddrl(port, S3C64XX_UINTM)); dbg("s3c64xx_serial_startup ok\n"); return ret; |