diff options
Diffstat (limited to 'drivers/serial/8250.c')
| -rw-r--r-- | drivers/serial/8250.c | 39 |
1 files changed, 27 insertions, 12 deletions
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index 342e12fb1c25..8058533f8418 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -1908,15 +1908,23 @@ static int serial8250_startup(struct uart_port *port) * kick the UART on a regular basis. */ if (!(iir1 & UART_IIR_NO_INT) && (iir & UART_IIR_NO_INT)) { + up->bugs |= UART_BUG_THRE; pr_debug("ttyS%d - using backup timer\n", port->line); - up->timer.function = serial8250_backup_timeout; - up->timer.data = (unsigned long)up; - mod_timer(&up->timer, jiffies + - poll_timeout(up->port.timeout) + HZ / 5); } } /* + * The above check will only give an accurate result the first time + * the port is opened so this value needs to be preserved. + */ + if (up->bugs & UART_BUG_THRE) { + up->timer.function = serial8250_backup_timeout; + up->timer.data = (unsigned long)up; + mod_timer(&up->timer, jiffies + + poll_timeout(up->port.timeout) + HZ / 5); + } + + /* * If the "interrupt" for this port doesn't correspond with any * hardware interrupt, we use a timer-based system. The original * driver used to do this with IRQ0. @@ -2203,9 +2211,9 @@ serial8250_set_termios(struct uart_port *port, struct ktermios *termios, serial_outp(up, UART_EFR, efr); } -#ifdef CONFIG_ARCH_OMAP15XX +#ifdef CONFIG_ARCH_OMAP /* Workaround to enable 115200 baud on OMAP1510 internal ports */ - if (cpu_is_omap1510() && is_omap_port((unsigned int)up->port.membase)) { + if (cpu_is_omap1510() && is_omap_port(up)) { if (baud == 115200) { quot = 1; serial_out(up, UART_OMAP_OSC_12M_SEL, 1); @@ -2258,18 +2266,27 @@ serial8250_pm(struct uart_port *port, unsigned int state, p->pm(port, state, oldstate); } +static unsigned int serial8250_port_size(struct uart_8250_port *pt) +{ + if (pt->port.iotype == UPIO_AU) + return 0x100000; +#ifdef CONFIG_ARCH_OMAP + if (is_omap_port(pt)) + return 0x16 << pt->port.regshift; +#endif + return 8 << pt->port.regshift; +} + /* * Resource handling. */ static int serial8250_request_std_resource(struct uart_8250_port *up) { - unsigned int size = 8 << up->port.regshift; + unsigned int size = serial8250_port_size(up); int ret = 0; switch (up->port.iotype) { case UPIO_AU: - size = 0x100000; - /* fall thru */ case UPIO_TSI: case UPIO_MEM32: case UPIO_MEM: @@ -2303,12 +2320,10 @@ static int serial8250_request_std_resource(struct uart_8250_port *up) static void serial8250_release_std_resource(struct uart_8250_port *up) { - unsigned int size = 8 << up->port.regshift; + unsigned int size = serial8250_port_size(up); switch (up->port.iotype) { case UPIO_AU: - size = 0x100000; - /* fall thru */ case UPIO_TSI: case UPIO_MEM32: case UPIO_MEM: |