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Diffstat (limited to 'board/omap3/zoom2/zoom2_serial.c')
-rw-r--r--board/omap3/zoom2/zoom2_serial.c130
1 files changed, 130 insertions, 0 deletions
diff --git a/board/omap3/zoom2/zoom2_serial.c b/board/omap3/zoom2/zoom2_serial.c
new file mode 100644
index 0000000..a3d777d
--- /dev/null
+++ b/board/omap3/zoom2/zoom2_serial.c
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2009 Wind River Systems, Inc.
+ * Tom Rix <Tom.Rix@windriver.com>
+ *
+ * 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
+ *
+ * This file was adapted from cpu/mpc5xxx/serial.c
+ *
+ */
+
+#include <common.h>
+#include <serial.h>
+#include <ns16550.h>
+#include <asm/arch/cpu.h>
+#include "zoom2_serial.h"
+
+int quad_init_dev (unsigned long base)
+{
+ /*
+ * The Quad UART is on the debug board.
+ * Check if the debug board is attached before using the UART
+ */
+ if (zoom2_debug_board_connected ()) {
+ NS16550_t com_port = (NS16550_t) base;
+ int baud_divisor = CONFIG_SYS_NS16550_CLK / 16 /
+ CONFIG_BAUDRATE;
+
+ /*
+ * Zoom2 has a board specific initialization of its UART.
+ * This generic initialization has been copied from
+ * drivers/serial/ns16550.c. The macros have been expanded.
+ *
+ * Do the following instead of
+ *
+ * NS16550_init (com_port, clock_divisor);
+ */
+ com_port->ier = 0x00;
+
+ /*
+ * On Zoom2 board Set pre-scalar to 1
+ * CLKSEL is GND => MCR[7] is 1 => preslr is 4
+ * So change the prescl to 1
+ */
+ com_port->lcr = 0xBF;
+ com_port->fcr |= 0x10;
+ com_port->mcr &= 0x7F;
+
+ /* This is generic ns16550.c setup */
+ com_port->lcr = UART_LCR_BKSE | UART_LCR_8N1;
+ com_port->dll = 0;
+ com_port->dlm = 0;
+ com_port->lcr = UART_LCR_8N1;
+ com_port->mcr = UART_MCR_DTR | UART_MCR_RTS;
+ com_port->fcr = UART_FCR_FIFO_EN | UART_FCR_RXSR |
+ UART_FCR_TXSR;
+ com_port->lcr = UART_LCR_BKSE | UART_LCR_8N1;
+ com_port->dll = baud_divisor & 0xff;
+ com_port->dlm = (baud_divisor >> 8) & 0xff;
+ com_port->lcr = UART_LCR_8N1;
+ }
+ /*
+ * We have to lie here, otherwise the board init code will hang
+ * on the check
+ */
+ return 0;
+}
+
+void quad_putc_dev (unsigned long base, const char c)
+{
+ if (zoom2_debug_board_connected ()) {
+
+ if (c == '\n')
+ quad_putc_dev (base, '\r');
+
+ NS16550_putc ((NS16550_t) base, c);
+ }
+}
+
+void quad_puts_dev (unsigned long base, const char *s)
+{
+ if (zoom2_debug_board_connected ()) {
+ while ((s != NULL) && (*s != '\0'))
+ quad_putc_dev (base, *s++);
+ }
+}
+
+int quad_getc_dev (unsigned long base)
+{
+ if (zoom2_debug_board_connected ())
+ return NS16550_getc ((NS16550_t) base);
+ else
+ return 0;
+}
+
+int quad_tstc_dev (unsigned long base)
+{
+ if (zoom2_debug_board_connected ())
+ return NS16550_tstc ((NS16550_t) base);
+ else
+ return 0;
+}
+
+void quad_setbrg_dev (unsigned long base)
+{
+ if (zoom2_debug_board_connected ()) {
+
+ int clock_divisor = CONFIG_SYS_NS16550_CLK / 16 /
+ CONFIG_BAUDRATE;
+
+ NS16550_reinit ((NS16550_t) base, clock_divisor);
+ }
+}
+
+QUAD_INIT (0)
+QUAD_INIT (1)
+QUAD_INIT (2)
+QUAD_INIT (3)