[U-Boot] [PATCH 04/11] [U-BOOT][ZOOM3] Initial support - adding board files (zoom3_serial.c)

[Aldo Cedillo]

From: Aldo Brett Cedillo Martinez <aldo.cedillo at ti.com>

Signed-off-by: Aldo Brett Cedillo Martinez <aldo.cedillo at ti.com>
---
 board/logicpd/zoom3/zoom3_serial.c |  132 ++++++++++++++++++++++++++++++++++++
 1 files changed, 132 insertions(+), 0 deletions(-)
 create mode 100644 board/logicpd/zoom3/zoom3_serial.c

diff --git a/board/logicpd/zoom3/zoom3_serial.c b/board/logicpd/zoom3/zoom3_serial.c
new file mode 100644
index 0000000..e50c6dc
--- /dev/null
+++ b/board/logicpd/zoom3/zoom3_serial.c
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2009 Wind River Systems, Inc.
+ * Tom Rix <Tom.Rix at windriver.com>
+ * Aldo Cedillo <aldo.cedillo at ti.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 arch/powerpc/cpu/mpc5xxx/serial.c
+ *
+ */
+
+#include <common.h>
+#include <serial.h>
+#include <ns16550.h>
+#include <asm/arch/cpu.h>
+#include "zoom3_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 (zoom3_debug_board_connected()) {
+		NS16550_t com_port = (NS16550_t) base;
+		int baud_divisor = CONFIG_SYS_NS16550_CLK / 16 /
+			CONFIG_BAUDRATE;
+		/*
+		 * Zoom3 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 Zoom3 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 (zoom3_debug_board_connected()) {
+		if (c == '\n')
+			quad_putc_dev(base, '\r');
+
+		NS16550_putc((NS16550_t) base, c);
+	} else {
+		usbtty_putc(c);
+	}
+}
+
+void quad_puts_dev(unsigned long base, const char *s)
+{
+	if (zoom3_debug_board_connected()) {
+		while ((s != NULL) && (*s != '\0'))
+			quad_putc_dev(base, *s++);
+	} else {
+		usbtty_puts(s);
+	}
+}
+
+int quad_getc_dev(unsigned long base)
+{
+	if (zoom3_debug_board_connected())
+		return NS16550_getc((NS16550_t) base);
+
+	return usbtty_getc();
+}
+
+int quad_tstc_dev(unsigned long base)
+{
+	if (zoom3_debug_board_connected())
+		return NS16550_tstc((NS16550_t) base);
+
+	return usbtty_tstc();
+}
+
+void quad_setbrg_dev(unsigned long base)
+{
+	if (zoom3_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)
-- 
1.6.3.3