1 /******************************************************************************
3 * Copyright (C) 2010 - 2014 Xilinx, Inc. All rights reserved.
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
7 * in the Software without restriction, including without limitation the rights
8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * Use of the Software is limited solely to applications:
16 * (a) running on a Xilinx device, or
17 * (b) that interact with a Xilinx device through a bus or interconnect.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * XILINX BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
23 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
24 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
27 * Except as contained in this notice, the name of the Xilinx shall not be used
28 * in advertising or otherwise to promote the sale, use or other dealings in
29 * this Software without prior written authorization from Xilinx.
31 ******************************************************************************/
32 /*****************************************************************************/
35 * @file xiicps_selftest.c
37 * This component contains the implementation of selftest functions for the
38 * XIicPs driver component.
41 * MODIFICATION HISTORY:
43 * Ver Who Date Changes
44 * ----- ------ -------- ---------------------------------------------
45 * 1.00a drg/jz 01/30/10 First release
46 * 1.00a sdm 09/22/11 Removed unused code
49 ******************************************************************************/
51 /***************************** Include Files *********************************/
55 /************************** Constant Definitions *****************************/
57 #define REG_TEST_VALUE 0x00000005
59 /**************************** Type Definitions *******************************/
62 /***************** Macros (Inline Functions) Definitions *********************/
65 /************************** Function Prototypes ******************************/
68 /************************** Variable Definitions *****************************/
71 /*****************************************************************************/
74 * Runs a self-test on the driver/device. The self-test is destructive in that
75 * a reset of the device is performed in order to check the reset values of
76 * the registers and to get the device into a known state.
78 * Upon successful return from the self-test, the device is reset.
80 * @param InstancePtr is a pointer to the XIicPs instance.
83 * - XST_SUCCESS if successful.
84 * - XST_REGISTER_ERROR indicates a register did not read or write
89 ******************************************************************************/
90 int XIicPs_SelfTest(XIicPs *InstancePtr)
93 Xil_AssertNonvoid(InstancePtr != NULL);
94 Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);
97 * All the IIC registers should be in their default state right now.
99 if ((XIICPS_CR_RESET_VALUE !=
100 XIicPs_ReadReg(InstancePtr->Config.BaseAddress,
101 XIICPS_CR_OFFSET)) ||
102 (XIICPS_TO_RESET_VALUE !=
103 XIicPs_ReadReg(InstancePtr->Config.BaseAddress,
104 XIICPS_TIME_OUT_OFFSET)) ||
105 (XIICPS_IXR_ALL_INTR_MASK !=
106 XIicPs_ReadReg(InstancePtr->Config.BaseAddress,
107 XIICPS_IMR_OFFSET))) {
111 XIicPs_Reset(InstancePtr);
114 * Write, Read then write a register
116 XIicPs_WriteReg(InstancePtr->Config.BaseAddress,
117 XIICPS_SLV_PAUSE_OFFSET, REG_TEST_VALUE);
119 if (REG_TEST_VALUE != XIicPs_ReadReg(InstancePtr->Config.BaseAddress,
120 XIICPS_SLV_PAUSE_OFFSET)) {
124 XIicPs_WriteReg(InstancePtr->Config.BaseAddress,
125 XIICPS_SLV_PAUSE_OFFSET, 0);
127 XIicPs_Reset(InstancePtr);