imx: serial: be sure to stop xmit upon shutdown

[pandora-kernel.git] / drivers / serial / 8250.c

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index b4b3981..fb867a9 100644 (file)
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -137,6 +137,7 @@ struct uart_8250_port {
        unsigned char           mcr;
        unsigned char           mcr_mask;       /* mask of user bits */
        unsigned char           mcr_force;      /* mask of forced bits */
+       unsigned char           cur_iotype;     /* Running I/O type */
 
        /*
         * Some bits in registers are cleared on a read, so they must
@@ -286,6 +287,13 @@ static const struct serial8250_config uart_config[] = {
                .fcr            = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
                .flags          = UART_CAP_FIFO,
        },
+       [PORT_AR7] = {
+               .name           = "AR7",
+               .fifo_size      = 16,
+               .tx_loadsz      = 16,
+               .fcr            = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_00,
+               .flags          = UART_CAP_FIFO | UART_CAP_AFE,
+       },
 };
 
 #if defined (CONFIG_SERIAL_8250_AU1X00)
@@ -471,6 +479,7 @@ static void io_serial_out(struct uart_port *p, int offset, int value)
 
 static void set_io_from_upio(struct uart_port *p)
 {
+       struct uart_8250_port *up = (struct uart_8250_port *)p;
        switch (p->iotype) {
        case UPIO_HUB6:
                p->serial_in = hub6_serial_in;
@@ -509,6 +518,8 @@ static void set_io_from_upio(struct uart_port *p)
                p->serial_out = io_serial_out;
                break;
        }
+       /* Remember loaded iotype */
+       up->cur_iotype = p->iotype;
 }
 
 static void
@@ -1937,6 +1948,9 @@ static int serial8250_startup(struct uart_port *port)
        up->capabilities = uart_config[up->port.type].flags;
        up->mcr = 0;
 
+       if (up->port.iotype != up->cur_iotype)
+               set_io_from_upio(port);
+
        if (up->port.type == PORT_16C950) {
                /* Wake up and initialize UART */
                up->acr = 0;
@@ -2563,6 +2577,9 @@ static void serial8250_config_port(struct uart_port *port, int flags)
        if (ret < 0)
                probeflags &= ~PROBE_RSA;
 
+       if (up->port.iotype != up->cur_iotype)
+               set_io_from_upio(port);
+
        if (flags & UART_CONFIG_TYPE)
                autoconfig(up, probeflags);
        if (up->port.type != PORT_UNKNOWN && flags & UART_CONFIG_IRQ)
@@ -2671,6 +2688,11 @@ serial8250_register_ports(struct uart_driver *drv, struct device *dev)
 {
        int i;
 
+       for (i = 0; i < nr_uarts; i++) {
+               struct uart_8250_port *up = &serial8250_ports[i];
+               up->cur_iotype = 0xFF;
+       }
+
        serial8250_isa_init_ports();
 
        for (i = 0; i < nr_uarts; i++) {