69 lines
2 KiB
Diff
69 lines
2 KiB
Diff
Index: linux-2.6.21.7/drivers/serial/pxa.c
|
|
===================================================================
|
|
--- linux-2.6.21.7.orig/drivers/serial/pxa.c
|
|
+++ linux-2.6.21.7/drivers/serial/pxa.c
|
|
@@ -57,6 +57,8 @@ struct uart_pxa_port {
|
|
unsigned int lsr_break_flag;
|
|
unsigned int cken;
|
|
char *name;
|
|
+ unsigned int msr;
|
|
+ unsigned int lsr;
|
|
};
|
|
|
|
static inline unsigned int serial_in(struct uart_pxa_port *up, int offset)
|
|
@@ -159,6 +161,7 @@ static inline void receive_chars(struct
|
|
|
|
ignore_char:
|
|
*status = serial_in(up, UART_LSR);
|
|
+ up->lsr = *status;
|
|
} while ((*status & UART_LSR_DR) && (max_count-- > 0));
|
|
tty_flip_buffer_push(tty);
|
|
}
|
|
@@ -211,7 +214,7 @@ static inline void check_modem_status(st
|
|
int status;
|
|
|
|
status = serial_in(up, UART_MSR);
|
|
-
|
|
+ up->msr = status;
|
|
if ((status & UART_MSR_ANY_DELTA) == 0)
|
|
return;
|
|
|
|
@@ -242,6 +245,7 @@ static inline irqreturn_t serial_pxa_irq
|
|
//printk(KERN_WARNING "serial_pxa_irq: odd -- interrupt triggered, but no interrupt in IIR: %08x\n",iir);
|
|
}
|
|
lsr = serial_in(up, UART_LSR);
|
|
+ up->lsr = lsr;
|
|
if (lsr & UART_LSR_DR)
|
|
receive_chars(up, &lsr);
|
|
check_modem_status(up);
|
|
@@ -258,7 +262,7 @@ static unsigned int serial_pxa_tx_empty(
|
|
unsigned int ret;
|
|
|
|
spin_lock_irqsave(&up->port.lock, flags);
|
|
- ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
|
|
+ ret = up->lsr & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
|
|
spin_unlock_irqrestore(&up->port.lock, flags);
|
|
|
|
return ret;
|
|
@@ -270,7 +274,7 @@ static unsigned int serial_pxa_get_mctrl
|
|
unsigned char status;
|
|
unsigned int ret;
|
|
|
|
- status = serial_in(up, UART_MSR);
|
|
+ status = up->msr;
|
|
|
|
ret = 0;
|
|
if (status & UART_MSR_DCD)
|
|
@@ -400,10 +404,10 @@ static int serial_pxa_startup(struct uar
|
|
/*
|
|
* And clear the interrupt registers again for luck.
|
|
*/
|
|
- (void) serial_in(up, UART_LSR);
|
|
+ up->lsr = serial_in(up, UART_LSR);
|
|
(void) serial_in(up, UART_RX);
|
|
(void) serial_in(up, UART_IIR);
|
|
- (void) serial_in(up, UART_MSR);
|
|
+ up->msr = serial_in(up, UART_MSR);
|
|
|
|
return 0;
|
|
}
|