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| author | Minkyu Kang <mk7.kang@samsung.com> | 2009-11-10 20:23:50 +0900 |
|---|---|---|
| committer | Tom Rix <Tom.Rix@windriver.com> | 2009-11-27 16:26:13 -0600 |
| commit | 940032260914076b1594906334b2e3f7af6fb7cf (patch) | |
| tree | af65a7cb7baa954825df8d53edde882c38de7f8f | |
| parent | 9ebfdc202275bcd9eb4af56e32bfb4253ff1b781 (diff) | |
| download | olio-uboot-2014.01-940032260914076b1594906334b2e3f7af6fb7cf.tar.xz olio-uboot-2014.01-940032260914076b1594906334b2e3f7af6fb7cf.zip | |
s5pc1xx: serial: fix the error check logic
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>
| -rw-r--r-- | drivers/serial/serial_s5pc1xx.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/serial/serial_s5pc1xx.c b/drivers/serial/serial_s5pc1xx.c index 68c06a919..73669a9f1 100644 --- a/drivers/serial/serial_s5pc1xx.c +++ b/drivers/serial/serial_s5pc1xx.c @@ -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; } |