Add Altera JTAG UART driver

Add Altera JTAG UART driver

I removed the CONFIG_ALTERA_JTAG_UART_BYPASS.

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 101 insertions, 0 deletions

diff --git a/drivers/serial/serial_altera_jtag.c b/drivers/serial/serial_altera_jtag.c
new file mode 100644
index 0000000000..322f9e9324
--- /dev/null
+++ b/drivers/serial/serial_altera_jtag.c
@@ -0,0 +1,101 @@
+/*
+ * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * (C) Copyright 2011 - Franck JULLIEN <elec4fun@gmail.com>
+ *
+ * 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 <driver.h>
+#include <init.h>
+#include <malloc.h>
+#include <asm/io.h>
+#include <asm/nios2-io.h>
+
+static int altera_serial_jtag_setbaudrate(struct console_device *cdev, int baudrate)
+{
+	return 0;
+}
+
+static void altera_serial_jtag_putc(struct console_device *cdev, char c)
+{
+	struct nios_jtag *jtag = (struct nios_jtag *)cdev->dev->map_base;
+	uint32_t st;
+
+	while (1) {
+		st = readl(&jtag->control);
+		if (NIOS_JTAG_WSPACE(st))
+			break;
+	}
+
+	writel(c, &jtag->data);
+}
+
+static int altera_serial_jtag_tstc(struct console_device *cdev)
+{
+	struct nios_jtag *jtag = (struct nios_jtag *)cdev->dev->map_base;
+
+	return readl(&jtag->control) & NIOS_JTAG_RRDY;
+}
+
+static int altera_serial_jtag_getc(struct console_device *cdev)
+{
+	struct nios_jtag *jtag = (struct nios_jtag *)cdev->dev->map_base;
+	uint32_t val;
+
+	while (1) {
+		val = readl(&jtag->data);
+		if (val & NIOS_JTAG_RVALID)
+			break;
+	}
+
+	return val & 0xFF;
+}
+
+static int altera_serial_jtag_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 = altera_serial_jtag_tstc;
+	cdev->putc = altera_serial_jtag_putc;
+	cdev->getc = altera_serial_jtag_getc;
+	cdev->setbrg = altera_serial_jtag_setbaudrate;
+
+	console_register(cdev);
+
+	return 0;
+}
+
+static struct driver_d altera_serial_jtag_driver = {
+	.name = "altera_serial_jtag",
+	.probe = altera_serial_jtag_probe,
+};
+
+static int altera_serial_jtag_init(void)
+{
+	return register_driver(&altera_serial_jtag_driver);
+}
+
+console_initcall(altera_serial_jtag_init);