/* Driver Manager Driver Interface Implementation.
*
* COPYRIGHT (c) 2009 Cobham Gaisler AB.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*
*/
/*
* This is the part the device driver API, the functions rely on that the
* parent bus driver has implemented the neccessary operations correctly.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <drvmgr/drvmgr.h>
#include "drvmgr_internal.h"
/* Get device pointer from knowing the Driver and the Driver minor
* that was assigned to it
*/
int drvmgr_get_dev(
struct drvmgr_drv *drv,
int minor,
struct drvmgr_dev **pdev)
{
struct drvmgr_dev *dev;
if (!drv)
return -1;
DRVMGR_LOCK_READ();
dev = drv->dev;
while (dev) {
if (dev->minor_drv == minor)
break;
dev = dev->next_in_drv;
}
DRVMGR_UNLOCK();
if (!dev)
return -1;
if (pdev)
*pdev = dev;
return 0;
}
/* Get Bus frequency in HZ from bus driver */
int drvmgr_freq_get(
struct drvmgr_dev *dev,
int options,
unsigned int *freq_hz)
{
if (!dev || !dev->parent || !dev->parent->ops->get_freq)
return -1;
return dev->parent->ops->get_freq(dev, options, freq_hz);
}
/* Get driver prefix */
int drvmgr_get_dev_prefix(struct drvmgr_dev *dev, char *dev_prefix)
{
struct drvmgr_bus_params params;
if (!dev || !dev->parent || !dev->parent->ops->get_params)
return -1;
dev->parent->ops->get_params(dev, ¶ms);
if (!params.dev_prefix)
return -1;
if (dev_prefix)
strcpy(dev_prefix, params.dev_prefix);
return 0;
}
/* Register an interrupt */
int drvmgr_interrupt_register(
struct drvmgr_dev *dev,
int index,
const char *info,
drvmgr_isr isr,
void *arg)
{
if (!dev || !dev->parent || !dev->parent->ops->int_register)
return -1;
if (!isr)
return -1;
return dev->parent->ops->int_register(dev, index, info, isr, arg);
}
/* Unregister an interrupt */
int drvmgr_interrupt_unregister(
struct drvmgr_dev *dev,
int index,
drvmgr_isr isr,
void *arg)
{
if (!dev || !dev->parent || !dev->parent->ops->int_unregister)
return -1;
if (!isr)
return -1;
return dev->parent->ops->int_unregister(dev, index, isr, arg);
}
int drvmgr_interrupt_clear(
struct drvmgr_dev *dev,
int index)
{
if (!dev || !dev->parent || !dev->parent->ops->int_clear)
return -1;
return dev->parent->ops->int_clear(dev, index);
}
int drvmgr_interrupt_unmask(
struct drvmgr_dev *dev,
int index)
{
if (!dev || !dev->parent || !dev->parent->ops->int_unmask)
return -1;
return dev->parent->ops->int_unmask(dev, index);
}
int drvmgr_interrupt_mask(
struct drvmgr_dev *dev,
int index)
{
if (!dev || !dev->parent || !dev->parent->ops->int_mask)
return -1;
return dev->parent->ops->int_mask(dev, index);
}
int drvmgr_on_rootbus(struct drvmgr_dev *dev)
{
if (dev->parent && dev->parent->dev && dev->parent->dev->parent)
return 0;
else
return 1;
}