target/linux/generic-2.6/files/crypto/ocf/kirkwood/mvHal/mv_hal/pex/mvVrtBrgPex.c

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  63 *******************************************************************************/
  64
  65 #include "mvPex.h"
  66
  67 //#define MV_DEBUG
  68 /* defines  */
  69 #ifdef MV_DEBUG
  70         #define DB(x)   x
  71 #else
  72         #define DB(x)
  73 #endif
  74
  75 /* locals */
  76 typedef struct
  77 {
  78         MV_U32 data;
  79         MV_U32 mask;
  80 }PEX_HEADER_DATA;
  81
  82 /* local function forwad decleration */
  83 MV_U32 mvPexHwConfigRead (MV_U32 pexIf, MV_U32 bus, MV_U32 dev, MV_U32 func,
  84                         MV_U32 regOff);
  85 MV_STATUS mvPexHwConfigWrite(MV_U32 pexIf, MV_U32 bus, MV_U32 dev,
  86                            MV_U32 func, MV_U32 regOff, MV_U32 data);
  87 void resetPexConfig(MV_U32 pexIf, MV_U32 bus, MV_U32 dev);
  88
  89
  90 PEX_HEADER_DATA configHdr[16] =
  91 {
  92 {0x888811ab, 0x00000000}, /*[device ID, vendor ID] */
  93 {0x00100007, 0x0000ffff}, /*[status register, command register] */
  94 {0x0604000e, 0x00000000}, /*[programming interface, sub class code, class code, revision ID] */
  95 {0x00010008, 0x00000000},  /*[BIST, header type, latency time, cache line] */
  96 {0x00000000, 0x00000000},  /*[base address 0] */
  97 {0x00000000, 0x00000000},  /*[base address 1] */
  98 {0x00000000, 0x00ffffff},  /*[secondary latency timersubordinate bus number, secondary bus number, primary bus number] */
  99 {0x0000f101, 0x00000000},  /*[secondary status ,IO limit, IO base] */
 100 {0x9ff0a000, 0x00000000},  /*[memory limit, memory base] */
 101 {0x0001fff1, 0x00000000},  /*[prefetch memory limit, prefetch memory base] */
 102 {0xffffffff, 0x00000000},  /*[prefetch memory base upper] */
 103 {0x00000000, 0x00000000},  /*[prefetch memory limit upper] */
 104 {0xeffff000, 0x00000000},  /*[IO limit upper 16 bits, IO base upper 16 bits] */
 105 {0x00000000, 0x00000000},  /*[reserved, capability pointer] */
 106 {0x00000000, 0x00000000},  /*[expansion ROM base address] */
 107 {0x00000000, 0x000000FF},  /*[bridge control, interrupt pin, interrupt line] */
 108 };
 109
 110
 111 #define HEADER_WRITE(data, offset) configHdr[offset/4].data = ((configHdr[offset/4].data & ~configHdr[offset/4].mask) | \
 112                                                                                                                                 (data & configHdr[offset/4].mask))
 113 #define HEADER_READ(offset) configHdr[offset/4].data
 114
 115 /*******************************************************************************
 116 * mvVrtBrgPexInit - Initialize PEX interfaces
 117 *
 118 * DESCRIPTION:
 119 *
 120 * This function is responsible of intialization of the Pex Interface , It
 121 * configure the Pex Bars and Windows in the following manner:
 122 *
 123 *  Assumptions :
 124 *                               Bar0 is always internal registers bar
 125 *                           Bar1 is always the DRAM bar
 126 *                               Bar2 is always the Device bar
 127 *
 128 *  1) Sets the Internal registers bar base by obtaining the base from
 129 *         the CPU Interface
 130 *  2) Sets the DRAM bar base and size by getting the base and size from
 131 *     the CPU Interface when the size is the sum of all enabled DRAM
 132 *         chip selects and the base is the base of CS0 .
 133 *  3) Sets the Device bar base and size by getting these values from the
 134 *     CPU Interface when the base is the base of the lowest base of the
 135 *     Device chip selects, and the
 136 *
 137 *
 138 * INPUT:
 139 *
 140 *       pexIf   -  PEX interface number.
 141 *
 142 *
 143 * OUTPUT:
 144 *       None.
 145 *
 146 * RETURN:
 147 *       MV_OK if function success otherwise MV_ERROR or MV_BAD_PARAM
 148 *
 149 *******************************************************************************/
 150 MV_STATUS mvPexVrtBrgInit(MV_U32 pexIf)
 151 {
 152         /* reset PEX tree to recover previous U-boot/Boot configurations */
 153         MV_U32 localBus = mvPexLocalBusNumGet(pexIf);
 154
 155
 156         resetPexConfig(pexIf, localBus, 1);
 157         return MV_OK;
 158 }
 159
 160
 161 MV_U32 mvPexVrtBrgConfigRead (MV_U32 pexIf, MV_U32 bus, MV_U32 dev, MV_U32 func,
 162                         MV_U32 regOff)
 163 {
 164
 165         MV_U32 localBus = mvPexLocalBusNumGet(pexIf);
 166         MV_U32 localDev = mvPexLocalDevNumGet(pexIf);
 167         MV_U32 val;
 168         if(bus == localBus)
 169         {
 170                 if(dev > 1)
 171                 {
 172 /* on the local device allow only device #0 & #1 */
 173                         return 0xffffffff;
 174                 }
 175                 else
 176                 if (dev == localDev)
 177                 {
 178                         /* read the memory controller registers */
 179                         return mvPexHwConfigRead (pexIf, bus, dev, func, regOff);
 180                 }
 181                 else
 182                 {
 183                         /* access the virtual brg header */
 184                         return HEADER_READ(regOff);
 185                 }
 186         }
 187         else
 188         if(bus == (localBus + 1))
 189         {
 190                 /* access the device behind the virtual bridge */
 191                 if((dev == localDev) || (dev > 1))
 192                 {
 193                         return 0xffffffff;
 194                 }
 195                 else
 196                 {
 197                         /* access the device behind the virtual bridge, in this case
 198                         *  change the bus number to the local bus number in order to
 199                         *  generate type 0 config cycle
 200                         */
 201                         mvPexLocalBusNumSet(pexIf, bus);
 202                         mvPexLocalDevNumSet(pexIf, 1);
 203                         val = mvPexHwConfigRead (pexIf, bus, 0, func, regOff);
 204                         mvPexLocalBusNumSet(pexIf, localBus);
 205                         mvPexLocalDevNumSet(pexIf, localDev);
 206                         return val;
 207                 }
 208         }
 209         /* for all other devices use the HW function to get the
 210         *  requested registers
 211         */
 212         mvPexLocalDevNumSet(pexIf, 1);
 213         val = mvPexHwConfigRead (pexIf, bus, dev, func, regOff);
 214         mvPexLocalDevNumSet(pexIf, localDev);
 215         return val;
 216 }
 217
 218
 219 MV_STATUS mvPexVrtBrgConfigWrite(MV_U32 pexIf, MV_U32 bus, MV_U32 dev,
 220                            MV_U32 func, MV_U32 regOff, MV_U32 data)
 221 {
 222         MV_U32 localBus = mvPexLocalBusNumGet(pexIf);
 223         MV_U32 localDev = mvPexLocalDevNumGet(pexIf);
 224         MV_STATUS       status;
 225
 226         if(bus == localBus)
 227         {
 228                 if(dev > 1)
 229                 {
 230                         /* on the local device allow only device #0 & #1 */
 231                         return MV_ERROR;
 232                 }
 233                 else
 234                 if (dev == localDev)
 235                 {
 236                         /* read the memory controller registers */
 237                         return mvPexHwConfigWrite (pexIf, bus, dev, func, regOff, data);
 238                 }
 239                 else
 240                 {
 241                         /* access the virtual brg header */
 242                         HEADER_WRITE(data, regOff);
 243                         return MV_OK;
 244                 }
 245         }
 246         else
 247         if(bus == (localBus + 1))
 248         {
 249                 /* access the device behind the virtual bridge */
 250                 if((dev == localDev) || (dev > 1))
 251                 {
 252                         return MV_ERROR;
 253                 }
 254                 else
 255                 {
 256                         /* access the device behind the virtual bridge, in this case
 257                         *  change the bus number to the local bus number in order to
 258                         *  generate type 0 config cycle
 259                         */
 260                         //return mvPexHwConfigWrite (pexIf, localBus, dev, func, regOff, data);
 261                         mvPexLocalBusNumSet(pexIf, bus);
 262                         mvPexLocalDevNumSet(pexIf, 1);
 263                         status = mvPexHwConfigWrite (pexIf, bus, 0, func, regOff, data);
 264                         mvPexLocalBusNumSet(pexIf, localBus);
 265                         mvPexLocalDevNumSet(pexIf, localDev);
 266                         return status;
 267
 268                 }
 269         }
 270         /* for all other devices use the HW function to get the
 271         *  requested registers
 272         */
 273         mvPexLocalDevNumSet(pexIf, 1);
 274         status = mvPexHwConfigWrite (pexIf, bus, dev, func, regOff, data);
 275         mvPexLocalDevNumSet(pexIf, localDev);
 276         return status;
 277 }
 278
 279
 280
 281
 282 void resetPexConfig(MV_U32 pexIf, MV_U32 bus, MV_U32 dev)
 283 {
 284         MV_U32 tData;
 285         MV_U32 i;
 286
 287         /* restore the PEX configuration to initialization state */
 288         /* in case PEX P2P call recursive and reset config */
 289         tData = mvPexHwConfigRead (pexIf, bus, dev, 0x0, 0x0);
 290         if(tData != 0xffffffff)
 291         {
 292                 /* agent had been found - check whether P2P */
 293                 tData = mvPexHwConfigRead (pexIf, bus, dev, 0x0, 0x8);
 294                 if((tData & 0xffff0000) == 0x06040000)
 295                 {/* P2P */
 296                         /* get the sec bus and the subordinate */
 297                         MV_U32 secBus;
 298                         tData = mvPexHwConfigRead (pexIf, bus, dev, 0x0, 0x18);
 299                         secBus = ((tData >> 8) & 0xff);
 300                         /* now scan on sec bus */
 301                         for(i = 0;i < 0xff;i++)
 302                         {
 303                                 resetPexConfig(pexIf, secBus, i);
 304                         }
 305                         /* now reset this device */
 306                         DB(mvOsPrintf("Reset bus %d dev %d\n", bus, dev));
 307                         mvPexHwConfigWrite(pexIf, bus, dev, 0x0, 0x18, 0x0);
 308                         DB(mvOsPrintf("Reset bus %d dev %d\n", bus, dev));
 309                 }
 310         }
 311 }
 312
 313