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path: root/drivers/tty/serial/8250/8250.h
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Diffstat (limited to 'drivers/tty/serial/8250/8250.h')
-rw-r--r--drivers/tty/serial/8250/8250.h23
1 files changed, 18 insertions, 5 deletions
diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h
index b00836851061..c43f74c53cd9 100644
--- a/drivers/tty/serial/8250/8250.h
+++ b/drivers/tty/serial/8250/8250.h
@@ -21,7 +21,6 @@ struct uart_8250_dma {
/* Filter function */
dma_filter_fn fn;
-
/* Parameter to the filter function */
void *rx_param;
void *tx_param;
@@ -53,7 +52,7 @@ struct old_serial_port {
unsigned int baud_base;
unsigned int port;
unsigned int irq;
- unsigned int flags;
+ upf_t flags;
unsigned char hub6;
unsigned char io_type;
unsigned char __iomem *iomem_base;
@@ -85,9 +84,6 @@ struct serial8250_config {
#define UART_BUG_THRE (1 << 3) /* UART has buggy THRE reassertion */
#define UART_BUG_PARITY (1 << 4) /* UART mishandles parity if FIFO enabled */
-#define PROBE_RSA (1 << 0)
-#define PROBE_ANY (~0)
-
#define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
#ifdef CONFIG_SERIAL_8250_SHARE_IRQ
@@ -198,3 +194,20 @@ static inline int serial8250_request_dma(struct uart_8250_port *p)
}
static inline void serial8250_release_dma(struct uart_8250_port *p) { }
#endif
+
+static inline int ns16550a_goto_highspeed(struct uart_8250_port *up)
+{
+ unsigned char status;
+
+ status = serial_in(up, 0x04); /* EXCR2 */
+#define PRESL(x) ((x) & 0x30)
+ if (PRESL(status) == 0x10) {
+ /* already in high speed mode */
+ return 0;
+ } else {
+ status &= ~0xB0; /* Disable LOCK, mask out PRESL[01] */
+ status |= 0x10; /* 1.625 divisor for baud_base --> 921600 */
+ serial_out(up, 0x04, status);
+ }
+ return 1;
+}