From c9d4f46b5d639a45747d5eaabd31d35856cb918f Mon Sep 17 00:00:00 2001 From: Scott McNutt Date: Fri, 19 Mar 2010 19:03:28 -0400 Subject: nios2: Move serial drivers to individual files in drivers/serial The standard Altera UART & JTAG UART as well as the OpenCores YANU driver are now in individual files in drivers/serial rather than a single file uner cpu/nios2. Signed-off-by: Scott McNutt --- drivers/serial/altera_jtag_uart.c | 70 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 drivers/serial/altera_jtag_uart.c (limited to 'drivers/serial/altera_jtag_uart.c') diff --git a/drivers/serial/altera_jtag_uart.c b/drivers/serial/altera_jtag_uart.c new file mode 100644 index 0000000000..9eccaa0c2a --- /dev/null +++ b/drivers/serial/altera_jtag_uart.c @@ -0,0 +1,70 @@ +/* + * (C) Copyright 2004, Psyent Corporation + * Scott McNutt + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include +#include +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + +/*------------------------------------------------------------------ + * JTAG acts as the serial port + *-----------------------------------------------------------------*/ +static nios_jtag_t *jtag = (nios_jtag_t *)CONFIG_SYS_NIOS_CONSOLE; + +void serial_setbrg( void ){ return; } +int serial_init( void ) { return(0);} + +void serial_putc (char c) +{ + while (NIOS_JTAG_WSPACE ( readl (&jtag->control)) == 0) + WATCHDOG_RESET (); + writel (&jtag->data, (unsigned char)c); +} + +void serial_puts (const char *s) +{ + while (*s != 0) + serial_putc (*s++); +} + +int serial_tstc (void) +{ + return ( readl (&jtag->control) & NIOS_JTAG_RRDY); +} + +int serial_getc (void) +{ + int c; + unsigned val; + + while (1) { + WATCHDOG_RESET (); + val = readl (&jtag->data); + if (val & NIOS_JTAG_RVALID) + break; + } + c = val & 0x0ff; + return (c); +} -- cgit v1.2.1