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   1 /* $Id: xttcps_options.c,v 1.1.2.1 2011/01/20 04:08:59 sadanan Exp $ */
   2 /******************************************************************************
   3 *
   4 * (c) Copyright 2010 Xilinx, Inc. All rights reserved.
   5 *
   6 * This file contains confidential and proprietary information of Xilinx, Inc.
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   8 * intellectual property laws.
   9 *
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  12 * materials distributed herewith. Except as otherwise provided in a valid
  13 * license issued to you by Xilinx, and to the maximum extent permitted by
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  38 * THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS PART OF THIS FILE
  39 * AT ALL TIMES.
  40 *
  41 ******************************************************************************/
  42 /*****************************************************************************/
  43 /**
  44 *
  45 * @file xttcps_options.c
  46 *
  47 * This file contains functions to get or set option features for the device.
  48 *
  49 * <pre>
  50 * MODIFICATION HISTORY:
  51 *
  52 * Ver   Who    Date     Changes
  53 * ----- ------ -------- ---------------------------------------------
  54 * 1.00a drg/jz 01/21/10 First release
  55 * 1.01a nm     03/05/2012 Removed break statement after return to remove
  56 *                         compilation warnings.
  57 * </pre>
  58 *
  59 ******************************************************************************/
  60
  61 /***************************** Include Files *********************************/
  62
  63 #include "xttcps.h"
  64
  65 /************************** Constant Definitions *****************************/
  66
  67
  68 /**************************** Type Definitions *******************************/
  69
  70
  71 /***************** Macros (Inline Functions) Definitions *********************/
  72
  73
  74 /************************** Function Prototypes ******************************/
  75
  76
  77 /************************** Variable Definitions *****************************/
  78
  79 /*
  80  * Create the table of options which are processed to get/set the device
  81  * options. These options are table driven to allow easy maintenance and
  82  * expansion of the options.
  83  */
  84 typedef struct {
  85         u32 Option;
  86         u32 Mask;
  87         u32 Register;
  88 } OptionsMap;
  89
  90 static OptionsMap TmrCtrOptionsTable[] = {
  91         {XTTCPS_OPTION_EXTERNAL_CLK, XTTCPS_CLK_CNTRL_SRC_MASK,
  92          XTTCPS_CLK_CNTRL_OFFSET},
  93         {XTTCPS_OPTION_CLK_EDGE_NEG, XTTCPS_CLK_CNTRL_EXT_EDGE_MASK,
  94          XTTCPS_CLK_CNTRL_OFFSET},
  95         {XTTCPS_OPTION_INTERVAL_MODE, XTTCPS_CNT_CNTRL_INT_MASK,
  96          XTTCPS_CNT_CNTRL_OFFSET},
  97         {XTTCPS_OPTION_DECREMENT, XTTCPS_CNT_CNTRL_DECR_MASK,
  98          XTTCPS_CNT_CNTRL_OFFSET},
  99         {XTTCPS_OPTION_MATCH_MODE, XTTCPS_CNT_CNTRL_MATCH_MASK,
 100          XTTCPS_CNT_CNTRL_OFFSET},
 101         {XTTCPS_OPTION_WAVE_DISABLE, XTTCPS_CNT_CNTRL_EN_WAVE_MASK,
 102          XTTCPS_CNT_CNTRL_OFFSET},
 103         {XTTCPS_OPTION_WAVE_POLARITY, XTTCPS_CNT_CNTRL_POL_WAVE_MASK,
 104          XTTCPS_CNT_CNTRL_OFFSET},
 105 };
 106
 107 #define XTTCPS_NUM_TMRCTR_OPTIONS (sizeof(TmrCtrOptionsTable) / \
 108                                 sizeof(OptionsMap))
 109
 110 /*****************************************************************************/
 111 /**
 112 *
 113 * This function sets the options for the TTC device.
 114 *
 115 * @param        InstancePtr is a pointer to the XTtcPs instance.
 116 * @param        Options contains the specified options to be set. This is a bit
 117 *               mask where a 1 means to turn the option on, and a 0 means to
 118 *               turn the option off. One or more bit values may be contained
 119 *               in the mask. See the bit definitions named XTTCPS_*_OPTION in
 120 *               the file xttcps.h.
 121 *
 122 * @return
 123 *               - XST_SUCCESS if options are successfully set.
 124 *               - XST_FAILURE if any of the options are unknown.
 125 *
 126 * @note         None
 127 *
 128 ******************************************************************************/
 129 int XTtcPs_SetOptions(XTtcPs *InstancePtr, u32 Options)
 130 {
 131         u32 CountReg;
 132         u32 ClockReg;
 133         unsigned Index;
 134
 135         Xil_AssertNonvoid(InstancePtr != NULL);
 136         Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);
 137
 138         ClockReg = XTtcPs_ReadReg(InstancePtr->Config.BaseAddress,
 139                                     XTTCPS_CLK_CNTRL_OFFSET);
 140         CountReg = XTtcPs_ReadReg(InstancePtr->Config.BaseAddress,
 141                                     XTTCPS_CNT_CNTRL_OFFSET);
 142
 143         /*
 144          * Loop through the options table, turning the option on or off
 145          * depending on whether the bit is set in the incoming options flag.
 146          */
 147         for (Index = 0; Index < XTTCPS_NUM_TMRCTR_OPTIONS; Index++) {
 148                 if (Options & TmrCtrOptionsTable[Index].Option) {
 149
 150                         switch (TmrCtrOptionsTable[Index].Register) {
 151
 152                         case XTTCPS_CLK_CNTRL_OFFSET:
 153                                 /* Add option */
 154                                 ClockReg |= TmrCtrOptionsTable[Index].Mask;
 155                                 break;
 156
 157                         case XTTCPS_CNT_CNTRL_OFFSET:
 158                                 /* Add option */
 159                                 CountReg |= TmrCtrOptionsTable[Index].Mask;
 160                                 break;
 161
 162                         default:
 163                                 return XST_FAILURE;
 164                         }
 165                 }
 166                 else {
 167                         switch (TmrCtrOptionsTable[Index].Register) {
 168
 169                         case XTTCPS_CLK_CNTRL_OFFSET:
 170                                 /* Remove option*/
 171                                 ClockReg &= ~TmrCtrOptionsTable[Index].Mask;
 172                                 break;
 173
 174                         case XTTCPS_CNT_CNTRL_OFFSET:
 175                                 /* Remove option*/
 176                                 CountReg &= ~TmrCtrOptionsTable[Index].Mask;
 177                                 break;
 178
 179                         default:
 180                                 return XST_FAILURE;
 181                         }
 182                 }
 183         }
 184
 185         /*
 186          * Now write the registers. Leave it to the upper layers to restart the
 187          * device.
 188          */
 189         XTtcPs_WriteReg(InstancePtr->Config.BaseAddress,
 190                           XTTCPS_CLK_CNTRL_OFFSET, ClockReg);
 191         XTtcPs_WriteReg(InstancePtr->Config.BaseAddress,
 192                           XTTCPS_CNT_CNTRL_OFFSET, CountReg);
 193
 194         return XST_SUCCESS;
 195 }
 196
 197 /*****************************************************************************/
 198 /**
 199 *
 200 * This function gets the settings for the options for the TTC device.
 201 *
 202 * @param        InstancePtr is a pointer to the XTtcPs instance.
 203 *
 204 * @return
 205 *
 206 * The return u32 contains the specified options that are set. This is a bit
 207 * mask where a '1' means the option is on, and a'0' means the option is off.
 208 * One or more bit values may be contained in the mask. See the bit definitions
 209 * named XTTCPS_*_OPTION in the file xttcps.h.
 210 *
 211 * @note         None.
 212 *
 213 ******************************************************************************/
 214 u32 XTtcPs_GetOptions(XTtcPs *InstancePtr)
 215 {
 216         u32 OptionsFlag = 0;
 217         u32 Register;
 218         unsigned Index;
 219
 220         Xil_AssertNonvoid(InstancePtr != NULL);
 221         Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);
 222
 223
 224         /*
 225          * Loop through the options table to determine which options are set
 226          */
 227         for (Index = 0; Index < XTTCPS_NUM_TMRCTR_OPTIONS; Index++) {
 228                 /*
 229                  * Get the control register to determine which options are
 230                  * currently set.
 231                  */
 232                 Register = XTtcPs_ReadReg(InstancePtr->Config.BaseAddress,
 233                                               TmrCtrOptionsTable[Index].
 234                                               Register);
 235
 236                 if (Register & TmrCtrOptionsTable[Index].Mask) {
 237                         OptionsFlag |= TmrCtrOptionsTable[Index].Option;
 238                 }
 239         }
 240
 241         return OptionsFlag;
 242 }