144 lines
3.8 KiB
C
144 lines
3.8 KiB
C
/****************************************************************************
|
|
* arch/arm/src/moxart/moxart_16550.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
|
|
#include <nuttx/irq.h>
|
|
#include <nuttx/arch.h>
|
|
#include <nuttx/serial/serial.h>
|
|
#include <nuttx/fs/ioctl.h>
|
|
#include <nuttx/serial/uart_16550.h>
|
|
#include <nuttx/serial/mxser.h>
|
|
|
|
#include "arm.h"
|
|
#include "arm_internal.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
void uart_decodeirq(int irq, FAR void *context)
|
|
{
|
|
int i;
|
|
uint32_t status;
|
|
static int os = 0;
|
|
|
|
status = *((volatile uart_addrwidth_t *)CONFIG_UART_MOXA_IRQ_STATUS_REG);
|
|
|
|
if ((status & 0x3f) == 0x3f)
|
|
{
|
|
return;
|
|
}
|
|
|
|
i = 0;
|
|
do
|
|
{
|
|
if (!(status & 0x1))
|
|
{
|
|
irq_dispatch(VIRQ_START + i, context);
|
|
}
|
|
|
|
status >>= 1;
|
|
}
|
|
while (++i <= 4);
|
|
}
|
|
|
|
#ifdef CONFIG_SERIAL_UART_ARCH_IOCTL
|
|
int uart_ioctl(struct file *filep, int cmd, unsigned long arg)
|
|
{
|
|
struct inode *inode = filep->f_inode;
|
|
struct uart_dev_s *dev = inode->i_private;
|
|
struct u16550_s *priv = (struct u16550_s *)dev->priv;
|
|
int ret = -ENOTTY;
|
|
uint32_t vmode;
|
|
unsigned int opmode;
|
|
int bitm_off;
|
|
|
|
/* TODO: calculate bit offset from UART_BASE address.
|
|
* E.g.:
|
|
* 0x9820_0000 -> 0
|
|
* 0x9820_0020 -> 1
|
|
* 0x9820_0040 -> 2
|
|
*/
|
|
|
|
/* HARD: coded value for UART1 */
|
|
|
|
bitm_off = 1;
|
|
|
|
switch (cmd)
|
|
{
|
|
case MOXA_SET_OP_MODE:
|
|
{
|
|
irqstate_t flags;
|
|
opmode = *(unsigned long *)arg;
|
|
|
|
/* Check for input data */
|
|
|
|
if (opmode & ~OP_MODE_MASK)
|
|
{
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
flags = enter_critical_section();
|
|
|
|
/* Update mode register with requested mode */
|
|
|
|
vmode = getreg32(CONFIG_UART_MOXA_MODE_REG);
|
|
putreg32(vmode & ~(OP_MODE_MASK << 2 * bitm_off),
|
|
CONFIG_UART_MOXA_MODE_REG);
|
|
vmode = opmode << 2 * bitm_off;
|
|
putreg32(getreg32(CONFIG_UART_MOXA_MODE_REG) | vmode,
|
|
CONFIG_UART_MOXA_MODE_REG);
|
|
|
|
leave_critical_section(flags);
|
|
ret = OK;
|
|
break;
|
|
}
|
|
|
|
case MOXA_GET_OP_MODE:
|
|
{
|
|
irqstate_t flags;
|
|
flags = enter_critical_section();
|
|
|
|
/* Read from mode register */
|
|
|
|
opmode = (getreg32(CONFIG_UART_MOXA_MODE_REG) >> 2 * bitm_off) &
|
|
OP_MODE_MASK;
|
|
|
|
leave_critical_section(flags);
|
|
*(unsigned long *)arg = opmode;
|
|
ret = OK;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif
|