add Hilscher netx serial driver

3 files changed, 181 insertions, 0 deletions

diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index e5e66e4d05..7514e86c09 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -5,6 +5,11 @@ config DRIVER_SERIAL_IMX
 	default y
 	bool "i.MX serial driver"
 
+config DRIVER_SERIAL_NETX
+	depends on ARCH_NETX
+	default y
+	bool "Netx serial driver"
+
 config DRIVER_SERIAL_LINUX_COMSOLE
 	depends on LINUX
 	default y
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 2db622a645..c4ed00fc1e 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -6,5 +6,6 @@
 # serial_pl011.o
 # serial_xuartlite.o
 obj-$(CONFIG_DRIVER_SERIAL_IMX)			+= serial_imx.o
+obj-$(CONFIG_DRIVER_SERIAL_NETX)		+= serial_netx.o
 obj-$(CONFIG_DRIVER_SERIAL_LINUX_COMSOLE)	+= linux_console.o
 obj-$(CONFIG_DRIVER_SERIAL_MPC5XXX)		+= serial_mpc5xxx.o
diff --git a/drivers/serial/serial_netx.c b/drivers/serial/serial_netx.c
new file mode 100644
index 0000000000..a66619477b
--- /dev/null
+++ b/drivers/serial/serial_netx.c
@@ -0,0 +1,175 @@
+/*
+ * (C) Copyright 2005
+ * Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
+ *
+ * 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 <common.h>
+#include <asm/arch/netx-regs.h>
+#include <driver.h>
+#include <init.h>
+#include <malloc.h>
+
+#define IO_WRITE(addr, val) (*(volatile unsigned long *)(addr) = (val))
+#define IO_READ(addr) (*(volatile unsigned long *)(addr))
+
+unsigned long addr = 0x100a00;
+
+enum uart_regs {
+	UART_DR              = 0x00,
+	UART_SR              = 0x04,
+	UART_LINE_CR         = 0x08,
+	UART_BAUDDIV_MSB     = 0x0c,
+	UART_BAUDDIV_LSB     = 0x10,
+	UART_CR              = 0x14,
+	UART_FR              = 0x18,
+	UART_IIR             = 0x1c,
+	UART_ILPR            = 0x20,
+	UART_RTS_CR          = 0x24,
+	UART_RTS_LEAD        = 0x28,
+	UART_RTS_TRAIL       = 0x2c,
+	UART_DRV_ENABLE      = 0x30,
+	UART_BRM_CR          = 0x34,
+	UART_RXFIFO_IRQLEVEL = 0x38,
+	UART_TXFIFO_IRQLEVEL = 0x3c,
+};
+
+#define LINE_CR_5BIT	(0<<5)
+#define LINE_CR_6BIT    (1<<5)
+#define LINE_CR_7BIT    (2<<5)
+#define LINE_CR_8BIT    (3<<5)
+#define LINE_CR_FEN	(1<<4)
+
+#define CR_UARTEN	(1<<0)
+
+#define FR_TXFE (1<<7)
+#define FR_RXFF (1<<6)
+#define FR_TXFF (1<<5)
+#define FR_RXFE (1<<4)
+#define FR_BUSY (1<<3)
+#define FR_DCD  (1<<2)
+#define FR_DSR  (1<<1)
+#define FR_CTS  (1<<0)
+
+#define DRV_ENABLE_TX  (1<<1)
+#define DRV_ENABLE_RTS (1<<0)
+
+#define BRM_CR_BAUD_RATE_MODE (1<<0)
+
+static int netx_serial_init_port(struct console_device *cdev)
+{
+	struct device_d *dev = cdev->dev;
+	unsigned int divisor;
+
+	/* disable uart */
+	IO_WRITE( dev->map_base + UART_CR, 0);
+
+	IO_WRITE( dev->map_base + UART_LINE_CR, LINE_CR_8BIT | LINE_CR_FEN);
+
+	IO_WRITE( dev->map_base + UART_DRV_ENABLE, DRV_ENABLE_TX | DRV_ENABLE_RTS );
+
+	/* set baud rate */
+	divisor = 115200 * 4096;
+	divisor /= 1000;
+	divisor *= 256;
+	divisor /= 100000;
+
+	IO_WRITE( dev->map_base + UART_BAUDDIV_MSB, (divisor >> 8) & 0xff );
+	IO_WRITE( dev->map_base + UART_BAUDDIV_LSB, divisor & 0xff );
+	IO_WRITE( dev->map_base + UART_BRM_CR, BRM_CR_BAUD_RATE_MODE);
+
+	/* Finally, enable the UART */
+	IO_WRITE( dev->map_base + UART_CR, CR_UARTEN);
+
+	return 0;
+}
+
+static int netx_serial_setbaudrate(struct console_device *cdev, int baudrate)
+{
+	struct device_d *dev = cdev->dev;
+
+
+	return 0;
+}
+
+static void netx_serial_putc(struct console_device *cdev, char c)
+{
+	struct device_d *dev = cdev->dev;
+
+	while( IO_READ(dev->map_base + UART_FR) & FR_TXFF );
+
+	IO_WRITE(dev->map_base + UART_DR, c);
+}
+
+static int netx_serial_getc(struct console_device *cdev)
+{
+	struct device_d *dev = cdev->dev;
+	int c;
+
+	while( IO_READ(dev->map_base + UART_FR) & FR_RXFE );
+
+	c = IO_READ(dev->map_base + UART_DR);
+
+	IO_READ(dev->map_base + UART_SR);
+
+	return c;
+}
+
+static int netx_serial_tstc(struct console_device *cdev)
+{
+	struct device_d *dev = cdev->dev;
+
+	return (IO_READ(dev->map_base + UART_FR) & FR_RXFE) ? 0 : 1;
+}
+
+static int netx_serial_probe(struct device_d *dev)
+{
+	struct console_device *cdev;
+
+	cdev = malloc(sizeof(struct console_device));
+	dev->type_data = cdev;
+	cdev->dev = dev;
+	cdev->f_caps = CONSOLE_STDIN | CONSOLE_STDOUT | CONSOLE_STDERR;
+	cdev->tstc = netx_serial_tstc;
+	cdev->putc = netx_serial_putc;
+	cdev->getc = netx_serial_getc;
+	cdev->setbrg = netx_serial_setbaudrate;
+
+	netx_serial_init_port(cdev);
+
+	console_register(cdev);
+
+	return 0;
+}
+
+static struct driver_d netx_serial_driver = {
+        .name  = "netx_serial",
+        .probe = netx_serial_probe,
+        .type  = DEVICE_TYPE_CONSOLE,
+};
+
+static int netx_serial_init(void)
+{
+	register_driver(&netx_serial_driver);
+	return 0;
+}
+
+console_initcall(netx_serial_init);
+