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/*
* (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 <io.h>
#include <asm/nios2-io.h>
struct altera_serial_jtag_priv {
struct console_device cdev;
void __iomem *regs;
};
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 altera_serial_jtag_priv *priv = container_of(cdev,
struct altera_serial_jtag_priv, cdev);
struct nios_jtag *jtag = priv->regs;
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 altera_serial_jtag_priv *priv = container_of(cdev,
struct altera_serial_jtag_priv, cdev);
struct nios_jtag *jtag = priv->regs;
return readl(&jtag->control) & NIOS_JTAG_RRDY;
}
static int altera_serial_jtag_getc(struct console_device *cdev)
{
struct altera_serial_jtag_priv *priv = container_of(cdev,
struct altera_serial_jtag_priv, cdev);
struct nios_jtag *jtag = priv->regs;
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;
struct altera_serial_jtag_priv *priv;
priv = xzalloc(sizeof(*priv));
cdev = &priv->cdev;
priv->regs = dev_request_mem_region(dev, 0);
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);
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