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/******************************************************************************
*
* Copyright (C) 2017-2019 Xilinx, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* XILINX BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of the Xilinx shall not be used
* in advertising or otherwise to promote the sale, use or other dealings in
* this Software without prior written authorization from Xilinx.
*
******************************************************************************/
/*****************************************************************************/
/**
*
* @file xrfdc_sinit.c
* @addtogroup rfdc_v6_0
* @{
*
* The implementation of the XRFdc component's static initialization
* functionality.
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver Who Date Changes
* ----- --- -------- -----------------------------------------------
* 1.0 sk 05/16/17 Initial release
* 5.0 mus 08/17/18 Updated XRFdc_LookupConfig to make use of device
* tree instead of xrfdc_g.c, to obtain
* XRFdc_Config for provided device id.It is being
* achieved through "param-list" property in RFDC
* device node, it will be having 1:1 mapping with
* the XRFdc_Config structure. Said changes
* have been done, to remove the xparameters.h
* dependency from RFDC Linux user space driver.
*
* </pre>
*
******************************************************************************/
/***************************** Include Files *********************************/
#define METAL_INTERNAL
#include "mpm/rfdc/xrfdc.h"
#ifdef __BAREMETAL__
#include "xparameters.h"
#else
#include <dirent.h>
#include <arpa/inet.h>
#endif
/************************** Constant Definitions *****************************/
/**************************** Type Definitions *******************************/
/***************** Macros (Inline Functions) Definitions *********************/
/************************** Function Prototypes ******************************/
/************************** Variable Definitions *****************************/
#ifdef __BAREMETAL__
extern XRFdc_Config XRFdc_ConfigTable[];
#else
static XRFdc_Config *XRFdc_ConfigTablePtr=NULL;
#endif
#ifndef __BAREMETAL__
/*****************************************************************************/
/**
*
* Compare two strings in the reversed order.This function compares only
* the last "Count" number of characters of Str1Ptr and Str2Ptr.
*
* @param Str1Ptr is base address of first string
* @param Str2Ptr is base address of second string
* @param Count is number of last characters to be compared between
* Str1Ptr and Str2Ptr
*
* @return
* 0 if last "Count" number of bytes matches between Str1Ptr and
* Str2Ptr, else differnce in unmatched character.
*
*@note None.
*
******************************************************************************/
static s32 XRFdc_Strrncmp(const char *Str1Ptr, const char *Str2Ptr, size_t Count)
{
u16 Len1 = strlen(Str1Ptr);
u16 Len2 = strlen(Str2Ptr);
u8 Diff;
for (; Len1 && Len2; Len1--, Len2--) {
if ((Diff = Str1Ptr[Len1 - 1] - Str2Ptr[Len2 - 1]) != 0) {
return Diff;
}
if (--Count == 0) {
return 0;
}
}
return (Len1 - Len2);
}
/*****************************************************************************/
/**
*
* Traverse "/sys/bus/platform/device" directory, to find RFDC device entry,
* corresponding to provided device id. If device entry corresponding to said
* device id is found, store it in output buffer DevNamePtr.
*
* @param DevNamePtr is base address of char array, where device name
* will be stored
* @param DevId contains the ID of the device to look up the
* RFDC device name entry in "/sys/bus/platform/device"
*
* @return
* - XRFDC_SUCCESS if successful.
* - XRFDC_FAILURE if device entry not found for given device id.
*
*@note None.
*
******************************************************************************/
s32 XRFdc_GetDeviceNameByDeviceId(char *DevNamePtr, u16 DevId)
{
s32 Status = XRFDC_FAILURE;
u32 Data = 0;
char CompatibleString[NAME_MAX];
struct metal_device *DevicePtr;
DIR *DirPtr;
struct dirent *DirentPtr;
char Len = strlen(XRFDC_COMPATIBLE_STRING);
char SignLen = strlen(XRFDC_SIGNATURE);
DirPtr = opendir(XRFDC_PLATFORM_DEVICE_DIR);
if (DirPtr) {
while ((DirentPtr = readdir(DirPtr)) != NULL) {
if (XRFdc_Strrncmp(DirentPtr->d_name,
XRFDC_SIGNATURE, SignLen) == 0) {
Status = metal_device_open("platform",DirentPtr->d_name,
&DevicePtr);
if (Status) {
metal_log(METAL_LOG_ERROR,
"\n Failed to open device %s", DirentPtr->d_name);
continue;
}
Status = metal_linux_get_device_property(DevicePtr,
XRFDC_COMPATIBLE_PROPERTY, CompatibleString ,
Len);
if (Status < 0) {
metal_log(METAL_LOG_ERROR,
"\n Failed to read device tree property");
} else if (strncmp(CompatibleString, \
XRFDC_COMPATIBLE_STRING, Len) == 0) {
Status = metal_linux_get_device_property(DevicePtr,
XRFDC_CONFIG_DATA_PROPERTY,
&Data, XRFDC_DEVICE_ID_SIZE);
if (Status < 0) {
metal_log(METAL_LOG_ERROR,
"\n Failed to read device tree property");
} else if ( Data == DevId ) {
strcpy(DevNamePtr, DirentPtr->d_name);
Status = XRFDC_SUCCESS;
metal_device_close(DevicePtr);
break;
}
}
metal_device_close(DevicePtr);
}
}
closedir(DirPtr);
}
return Status;
}
#endif
/*****************************************************************************/
/**
*
* Looks up the device configuration based on the unique device ID. A table
* contains the configuration info for each device in the system.
*
* @param DeviceId contains the ID of the device to look up the
* configuration for.
*
* @return
*
* A pointer to the configuration found or NULL if the specified device ID was
* not found. See xrfdc.h for the definition of XRFdc_Config.
*
* @note None.
*
******************************************************************************/
XRFdc_Config *XRFdc_LookupConfig(u16 DeviceId)
{
XRFdc_Config *CfgPtr = NULL;
#ifndef __BAREMETAL__
s32 Status=0;
u32 NumInstances;
struct metal_device *Deviceptr;
char DeviceName[NAME_MAX];
Status = XRFdc_GetDeviceNameByDeviceId(DeviceName, DeviceId);
if (Status != XRFDC_SUCCESS) {
metal_log(METAL_LOG_ERROR, "\n Invalid device id %d", DeviceId);
goto RETURN_PATH2;
}
Status = metal_device_open(XRFDC_BUS_NAME, DeviceName, &Deviceptr);
if (Status) {
metal_log(METAL_LOG_ERROR, "\n Failed to open device %s", DeviceName);
goto RETURN_PATH2;
}
if (XRFdc_ConfigTablePtr == NULL) {
Status = metal_linux_get_device_property(Deviceptr,
XRFDC_NUM_INSTANCES_PROPERTY,
&NumInstances, XRFDC_NUM_INST_SIZE);
if (Status < 0) {
metal_log(METAL_LOG_ERROR,
"\n Failed to read device tree property %s",
XRFDC_NUM_INSTANCES_PROPERTY);
goto RETURN_PATH1;
}
XRFdc_ConfigTablePtr = (XRFdc_Config*) malloc(ntohl(NumInstances) * \
XRFDC_CONFIG_DATA_SIZE);
if (XRFdc_ConfigTablePtr == NULL) {
metal_log(METAL_LOG_ERROR,
"\n Failed to allocate memory for XRFdc_ConfigTablePtr");
goto RETURN_PATH1;
}
}
Status = metal_linux_get_device_property(Deviceptr,
XRFDC_CONFIG_DATA_PROPERTY,
&XRFdc_ConfigTablePtr[DeviceId],
XRFDC_CONFIG_DATA_SIZE);
if (Status == XRFDC_SUCCESS) {
CfgPtr = &XRFdc_ConfigTablePtr[DeviceId];
} else {
metal_log(METAL_LOG_ERROR,
"\n Failed to read device tree property %s",
XRFDC_CONFIG_DATA_PROPERTY);
}
RETURN_PATH1:
metal_device_close(Deviceptr);
RETURN_PATH2:
#else
u32 Index;
for (Index = 0U; Index < (u32)XPAR_XRFDC_NUM_INSTANCES; Index++) {
if (XRFdc_ConfigTable[Index].DeviceId == DeviceId) {
CfgPtr = &XRFdc_ConfigTable[Index];
break;
}
}
#endif
return (XRFdc_Config *)CfgPtr;
}
/** @} */
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