diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/altera_jtag_uart.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/serial/altera_jtag_uart.c b/drivers/serial/altera_jtag_uart.c index fb28aa9..2980e4d 100644 --- a/drivers/serial/altera_jtag_uart.c +++ b/drivers/serial/altera_jtag_uart.c @@ -38,8 +38,16 @@ int serial_init( void ) { return(0);} void serial_putc (char c) { - while (NIOS_JTAG_WSPACE ( readl (&jtag->control)) == 0) - WATCHDOG_RESET (); + while (1) { + unsigned st = readl(&jtag->control); + if (NIOS_JTAG_WSPACE(st)) + break; +#ifdef CONFIG_ALTERA_JTAG_UART_BYPASS + if (!(st & NIOS_JTAG_AC)) /* no connection */ + return; +#endif + WATCHDOG_RESET(); + } writel ((unsigned char)c, &jtag->data); } |