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   1 /******************************************************************************
   2 *
   3 * Copyright (C) 2010 - 2014 Xilinx, Inc.  All rights reserved.
   4 *
   5 * Permission is hereby granted, free of charge, to any person obtaining a copy
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   9 * copies of the Software, and to permit persons to whom the Software is
  10 * furnished to do so, subject to the following conditions:
  11 *
  12 * The above copyright notice and this permission notice shall be included in
  13 * all copies or substantial portions of the Software.
  14 *
  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.
  18 *
  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,
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  29 * this Software without prior written authorization from Xilinx.
  30 *
  31 ******************************************************************************/
  32 /*****************************************************************************/
  33 /**
  34 *
  35 * @file xttcps_options.c
  36 * @addtogroup ttcps_v2_0
  37 * @{
  38 *
  39 * This file contains functions to get or set option features for the device.
  40 *
  41 * <pre>
  42 * MODIFICATION HISTORY:
  43 *
  44 * Ver   Who    Date     Changes
  45 * ----- ------ -------- ---------------------------------------------
  46 * 1.00a drg/jz 01/21/10 First release
  47 * 1.01a nm     03/05/2012 Removed break statement after return to remove
  48 *                         compilation warnings.
  49 * </pre>
  50 *
  51 ******************************************************************************/
  52
  53 /***************************** Include Files *********************************/
  54
  55 #include "xttcps.h"
  56
  57 /************************** Constant Definitions *****************************/
  58
  59
  60 /**************************** Type Definitions *******************************/
  61
  62
  63 /***************** Macros (Inline Functions) Definitions *********************/
  64
  65
  66 /************************** Function Prototypes ******************************/
  67
  68
  69 /************************** Variable Definitions *****************************/
  70
  71 /*
  72  * Create the table of options which are processed to get/set the device
  73  * options. These options are table driven to allow easy maintenance and
  74  * expansion of the options.
  75  */
  76 typedef struct {
  77         u32 Option;
  78         u32 Mask;
  79         u32 Register;
  80 } OptionsMap;
  81
  82 static OptionsMap TmrCtrOptionsTable[] = {
  83         {XTTCPS_OPTION_EXTERNAL_CLK, XTTCPS_CLK_CNTRL_SRC_MASK,
  84          XTTCPS_CLK_CNTRL_OFFSET},
  85         {XTTCPS_OPTION_CLK_EDGE_NEG, XTTCPS_CLK_CNTRL_EXT_EDGE_MASK,
  86          XTTCPS_CLK_CNTRL_OFFSET},
  87         {XTTCPS_OPTION_INTERVAL_MODE, XTTCPS_CNT_CNTRL_INT_MASK,
  88          XTTCPS_CNT_CNTRL_OFFSET},
  89         {XTTCPS_OPTION_DECREMENT, XTTCPS_CNT_CNTRL_DECR_MASK,
  90          XTTCPS_CNT_CNTRL_OFFSET},
  91         {XTTCPS_OPTION_MATCH_MODE, XTTCPS_CNT_CNTRL_MATCH_MASK,
  92          XTTCPS_CNT_CNTRL_OFFSET},
  93         {XTTCPS_OPTION_WAVE_DISABLE, XTTCPS_CNT_CNTRL_EN_WAVE_MASK,
  94          XTTCPS_CNT_CNTRL_OFFSET},
  95         {XTTCPS_OPTION_WAVE_POLARITY, XTTCPS_CNT_CNTRL_POL_WAVE_MASK,
  96          XTTCPS_CNT_CNTRL_OFFSET},
  97 };
  98
  99 #define XTTCPS_NUM_TMRCTR_OPTIONS (sizeof(TmrCtrOptionsTable) / \
 100                                 sizeof(OptionsMap))
 101
 102 /*****************************************************************************/
 103 /**
 104 *
 105 * This function sets the options for the TTC device.
 106 *
 107 * @param        InstancePtr is a pointer to the XTtcPs instance.
 108 * @param        Options contains the specified options to be set. This is a bit
 109 *               mask where a 1 means to turn the option on, and a 0 means to
 110 *               turn the option off. One or more bit values may be contained
 111 *               in the mask. See the bit definitions named XTTCPS_*_OPTION in
 112 *               the file xttcps.h.
 113 *
 114 * @return
 115 *               - XST_SUCCESS if options are successfully set.
 116 *               - XST_FAILURE if any of the options are unknown.
 117 *
 118 * @note         None
 119 *
 120 ******************************************************************************/
 121 int XTtcPs_SetOptions(XTtcPs *InstancePtr, u32 Options)
 122 {
 123         u32 CountReg;
 124         u32 ClockReg;
 125         unsigned Index;
 126
 127         Xil_AssertNonvoid(InstancePtr != NULL);
 128         Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);
 129
 130         ClockReg = XTtcPs_ReadReg(InstancePtr->Config.BaseAddress,
 131                                     XTTCPS_CLK_CNTRL_OFFSET);
 132         CountReg = XTtcPs_ReadReg(InstancePtr->Config.BaseAddress,
 133                                     XTTCPS_CNT_CNTRL_OFFSET);
 134
 135         /*
 136          * Loop through the options table, turning the option on or off
 137          * depending on whether the bit is set in the incoming options flag.
 138          */
 139         for (Index = 0; Index < XTTCPS_NUM_TMRCTR_OPTIONS; Index++) {
 140                 if (Options & TmrCtrOptionsTable[Index].Option) {
 141
 142                         switch (TmrCtrOptionsTable[Index].Register) {
 143
 144                         case XTTCPS_CLK_CNTRL_OFFSET:
 145                                 /* Add option */
 146                                 ClockReg |= TmrCtrOptionsTable[Index].Mask;
 147                                 break;
 148
 149                         case XTTCPS_CNT_CNTRL_OFFSET:
 150                                 /* Add option */
 151                                 CountReg |= TmrCtrOptionsTable[Index].Mask;
 152                                 break;
 153
 154                         default:
 155                                 return XST_FAILURE;
 156                         }
 157                 }
 158                 else {
 159                         switch (TmrCtrOptionsTable[Index].Register) {
 160
 161                         case XTTCPS_CLK_CNTRL_OFFSET:
 162                                 /* Remove option*/
 163                                 ClockReg &= ~TmrCtrOptionsTable[Index].Mask;
 164                                 break;
 165
 166                         case XTTCPS_CNT_CNTRL_OFFSET:
 167                                 /* Remove option*/
 168                                 CountReg &= ~TmrCtrOptionsTable[Index].Mask;
 169                                 break;
 170
 171                         default:
 172                                 return XST_FAILURE;
 173                         }
 174                 }
 175         }
 176
 177         /*
 178          * Now write the registers. Leave it to the upper layers to restart the
 179          * device.
 180          */
 181         XTtcPs_WriteReg(InstancePtr->Config.BaseAddress,
 182                           XTTCPS_CLK_CNTRL_OFFSET, ClockReg);
 183         XTtcPs_WriteReg(InstancePtr->Config.BaseAddress,
 184                           XTTCPS_CNT_CNTRL_OFFSET, CountReg);
 185
 186         return XST_SUCCESS;
 187 }
 188
 189 /*****************************************************************************/
 190 /**
 191 *
 192 * This function gets the settings for the options for the TTC device.
 193 *
 194 * @param        InstancePtr is a pointer to the XTtcPs instance.
 195 *
 196 * @return
 197 *
 198 * The return u32 contains the specified options that are set. This is a bit
 199 * mask where a '1' means the option is on, and a'0' means the option is off.
 200 * One or more bit values may be contained in the mask. See the bit definitions
 201 * named XTTCPS_*_OPTION in the file xttcps.h.
 202 *
 203 * @note         None.
 204 *
 205 ******************************************************************************/
 206 u32 XTtcPs_GetOptions(XTtcPs *InstancePtr)
 207 {
 208         u32 OptionsFlag = 0;
 209         u32 Register;
 210         unsigned Index;
 211
 212         Xil_AssertNonvoid(InstancePtr != NULL);
 213         Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);
 214
 215
 216         /*
 217          * Loop through the options table to determine which options are set
 218          */
 219         for (Index = 0; Index < XTTCPS_NUM_TMRCTR_OPTIONS; Index++) {
 220                 /*
 221                  * Get the control register to determine which options are
 222                  * currently set.
 223                  */
 224                 Register = XTtcPs_ReadReg(InstancePtr->Config.BaseAddress,
 225                                               TmrCtrOptionsTable[Index].
 226                                               Register);
 227
 228                 if (Register & TmrCtrOptionsTable[Index].Mask) {
 229                         OptionsFlag |= TmrCtrOptionsTable[Index].Option;
 230                 }
 231         }
 232
 233         return OptionsFlag;
 234 }
 235 /** @} */