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s5pc1xx: serial: fix the error check logic

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Because of Frame error, Parity error and Overrun error are occured only receive
operation, need to masking when error checking.

Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Minkyu Kang 2009-11-10 20:23:50 +09:00
parent 2888223720
commit 78b06d63e2
1 changed files with 16 additions and 6 deletions
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22
drivers/serial/serial_s5pc1xx.c
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@ -98,14 +98,24 @@ int serial_init_dev(const int dev_index)
return 0;
}
static int serial_err_check(const int dev_index)
static int serial_err_check(const int dev_index, int op)
{
struct s5pc1xx_uart *const uart = s5pc1xx_get_base_uart(dev_index);
unsigned int mask;
if (readl(&uart->uerstat) & 0xf)
return 1;
/*
* UERSTAT
* Break Detect [3]
* Frame Err [2] : receive operation
* Parity Err [1] : receive operation
* Overrun Err [0] : receive operation
*/
if (op)
mask = 0x8;
else
mask = 0xf;
return 0;
return readl(&uart->uerstat) & mask;
}
/*
@ -119,7 +129,7 @@ int serial_getc_dev(const int dev_index)
/* wait for character to arrive */
while (!(readl(&uart->utrstat) & 0x1)) {
if (serial_err_check(dev_index))
if (serial_err_check(dev_index, 0))
return 0;
}
@ -135,7 +145,7 @@ void serial_putc_dev(const char c, const int dev_index)
/* wait for room in the tx FIFO */
while (!(readl(&uart->utrstat) & 0x2)) {
if (serial_err_check(dev_index))
if (serial_err_check(dev_index, 1))
return;
}