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/* *********************************************************************
* Broadcom Common Firmware Environment (CFE)
*
* Device Attach routines File: cfe_attach.c
*
* This module manages the list of device drivers. When a driver
* is probed, it can call cfe_attach to create actual device
* instances. The routines in this module manage the
* device list and the assignment of device names.
*
* Author: Mitch Lichtenberg (mpl@broadcom.com)
*
*********************************************************************
*
* Copyright 2000,2001,2002,2003
* Broadcom Corporation. All rights reserved.
*
* This software is furnished under license and may be used and
* copied only in accordance with the following terms and
* conditions. Subject to these conditions, you may download,
* copy, install, use, modify and distribute modified or unmodified
* copies of this software in source and/or binary form. No title
* or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce
* and retain this copyright notice and list of conditions
* as they appear in the source file.
*
* 2) No right is granted to use any trade name, trademark, or
* logo of Broadcom Corporation. The "Broadcom Corporation"
* name may not be used to endorse or promote products derived
* from this software without the prior written permission of
* Broadcom Corporation.
*
* 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
* WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT
* SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN
* PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
********************************************************************* */
#include "lib_types.h"
#include "lib_malloc.h"
#include "lib_queue.h"
#include "lib_printf.h"
#include "lib_string.h"
#include "cfe_iocb.h"
#include "cfe_device.h"
/* *********************************************************************
* Constants
********************************************************************* */
#define CFE_MAX_DEVINST 64 /* max # of instances of devices */
/* *********************************************************************
* Globals
********************************************************************* */
/*
* Our device list.
*/
queue_t cfe_devices = {&cfe_devices, &cfe_devices};
/* *********************************************************************
* cfe_finddev(name)
*
* Locate a device in the device list by its name and return
* a pointer to the device structure.
*
* Input parameters:
* name - name of device, e.g., "uart0"
*
* Return value:
* cfe_device_t pointer or NULL
********************************************************************* */
cfe_device_t *cfe_finddev(char *name)
{
queue_t *qb;
cfe_device_t *dev;
for (qb = cfe_devices.q_next; qb != &cfe_devices; qb = qb->q_next) {
dev = (cfe_device_t *) qb;
if (strcmp(dev->dev_fullname,name) == 0) {
return dev;
}
}
return NULL;
}
/* *********************************************************************
* cfe_device_reset()
*
* Call all the "reset" methods in the devices on the device
* list. Note that the methods get called even when the
* devices are closed!
*
* Input parameters:
* nothing
*
* Return value:
* nothing
********************************************************************* */
void cfe_device_reset(void)
{
queue_t *qb;
cfe_device_t *dev;
for (qb = cfe_devices.q_next; qb != &cfe_devices; qb = qb->q_next) {
dev = (cfe_device_t *) qb;
if (dev->dev_dispatch->dev_reset) {
(*(dev->dev_dispatch->dev_reset))(dev->dev_softc);
}
}
}
/* *********************************************************************
* cfe_attach_idx(drv,idx,softc,bootinfo,description)
*
* Add a device to the device list at a specific index. This
* is mainly used for devices like SCSI disks or CD-ROMs so
* we can use an index that matches the target ID or LUN.
*
* Input parameters:
* drv - driver structure (from the device driver module)
* idx - requested index (e.g., uartn where 'n' is the idx)
* softc - Unique information maintained for this device
* bootinfo - suffix for long form of the device name. For
* example, scsi0.3.1 might mean SCSI controller
* 0, device ID 3, LUN 1. The bootinfo would be
* "3.1"
* description - something nice to say for the devices command
*
* Return value:
* 0 if device has already been added at this index
* <0 for other problems
* 1 if we were successful.
********************************************************************* */
int cfe_attach_idx(cfe_driver_t *drv,int idx,void *softc,
char *bootinfo,char *description)
{
char name[64];
cfe_device_t *dev;
xsprintf(name,"%s%d",drv->drv_bootname,idx);
if (bootinfo) {
strcat(name,".");
strcat(name,bootinfo);
}
if (cfe_finddev(name) != NULL) {
return 0;
}
dev = (cfe_device_t *) KMALLOC(sizeof(cfe_device_t),0);
if (!dev) return -1;
dev->dev_fullname = strdup(name);
dev->dev_softc = softc;
dev->dev_class = drv->drv_class;
dev->dev_dispatch = drv->drv_dispatch;
dev->dev_description = description ? strdup(description) : NULL;
dev->dev_opencount = 0;
q_enqueue(&cfe_devices,(queue_t *) dev);
return 1;
}
/* *********************************************************************
* cfe_attach(drv,softc,bootinfo,description
*
* Add a device to the system. This is a callback from the
* probe routine, and is used to actually add devices to CFE's
* device list.
*
* Input parameters:
* drv - driver structure (from the device driver module)
* softc - Unique information maintained for this device
* bootinfo - suffix for long form of the device name. For
* example, scsi0.3.1 might mean SCSI controller
* 0, device ID 3, LUN 1. The bootinfo would be
* "3.1"
* description - something nice to say for the devices command
*
* Return value:
* nothing
********************************************************************* */
void cfe_attach(cfe_driver_t *drv,void *softc,
char *bootinfo,
char *description)
{
int idx;
int res;
/*
* Try device indicies 0..CFE_MAX_DEVINST to assign a unique
* device name for this device. This is a really braindead way to
* do this, but how many devices are we expecting anyway?
*/
for (idx = 0; idx < CFE_MAX_DEVINST; idx++) {
res = cfe_attach_idx(drv,idx,softc,bootinfo,description);
if (res < 0) break; /* out of memory or other badness */
if (res > 0) break; /* success! */
/* otherwise, try again, slot is taken */
}
}
/* *********************************************************************
* cfe_attach_init()
*
* Initialize this module.
*
* Input parameters:
* nothing
*
* Return value:
* nothing
********************************************************************* */
void cfe_attach_init(void)
{
q_init(&(cfe_devices));
}
/* *********************************************************************
* cfe_device_name(ctx)
*
* Given a device context, return a device name
*
* Input parameters:
* ctx - context
*
* Return value:
* name
********************************************************************* */
char *cfe_device_name(cfe_devctx_t *ctx)
{
return ctx->dev_dev->dev_fullname;
}
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