board/bf537-stamp/post-memory.c

   1 #include <common.h>
   2 #include <asm/io.h>
   3
   4 #ifdef CONFIG_POST
   5
   6 #include <post.h>
   7 #include <watchdog.h>
   8
   9 #if CONFIG_POST & CONFIG_SYS_POST_MEMORY
  10 #define CLKIN 25000000
  11 #define PATTERN1 0x5A5A5A5A
  12 #define PATTERN2 0xAAAAAAAA
  13
  14 #define CCLK_NUM        4
  15 #define SCLK_NUM        3
  16
  17 void post_out_buff(char *buff);
  18 int post_key_pressed(void);
  19 void post_init_pll(int mult, int div);
  20 int post_init_sdram(int sclk);
  21 void post_init_uart(int sclk);
  22
  23 const int pll[CCLK_NUM][SCLK_NUM][2] = {
  24         {{20, 4}, {20, 5}, {20, 10}},   /* CCLK = 500M */
  25         {{16, 4}, {16, 5}, {16, 8}},    /* CCLK = 400M */
  26         {{8, 2}, {8, 4}, {8, 5}},       /* CCLK = 200M */
  27         {{4, 1}, {4, 2}, {4, 4}}        /* CCLK = 100M */
  28 };
  29 const char *const log[CCLK_NUM][SCLK_NUM] = {
  30         {"CCLK-500Mhz SCLK-125Mhz:    Writing...\0",
  31          "CCLK-500Mhz SCLK-100Mhz:    Writing...\0",
  32          "CCLK-500Mhz SCLK- 50Mhz:    Writing...\0",},
  33         {"CCLK-400Mhz SCLK-100Mhz:    Writing...\0",
  34          "CCLK-400Mhz SCLK- 80Mhz:    Writing...\0",
  35          "CCLK-400Mhz SCLK- 50Mhz:    Writing...\0",},
  36         {"CCLK-200Mhz SCLK-100Mhz:    Writing...\0",
  37          "CCLK-200Mhz SCLK- 50Mhz:    Writing...\0",
  38          "CCLK-200Mhz SCLK- 40Mhz:    Writing...\0",},
  39         {"CCLK-100Mhz SCLK-100Mhz:    Writing...\0",
  40          "CCLK-100Mhz SCLK- 50Mhz:    Writing...\0",
  41          "CCLK-100Mhz SCLK- 25Mhz:    Writing...\0",},
  42 };
  43
  44 int memory_post_test(int flags)
  45 {
  46         int addr;
  47         int m, n;
  48         int sclk, sclk_temp;
  49         int ret = 1;
  50
  51         sclk_temp = CLKIN / 1000000;
  52         sclk_temp = sclk_temp * CONFIG_VCO_MULT;
  53         for (sclk = 0; sclk_temp > 0; sclk++)
  54                 sclk_temp -= CONFIG_SCLK_DIV;
  55         sclk = sclk * 1000000;
  56         post_init_uart(sclk);
  57         if (post_key_pressed() == 0)
  58                 return 0;
  59
  60         for (m = 0; m < CCLK_NUM; m++) {
  61                 for (n = 0; n < SCLK_NUM; n++) {
  62                         /* Calculate the sclk */
  63                         sclk_temp = CLKIN / 1000000;
  64                         sclk_temp = sclk_temp * pll[m][n][0];
  65                         for (sclk = 0; sclk_temp > 0; sclk++)
  66                                 sclk_temp -= pll[m][n][1];
  67                         sclk = sclk * 1000000;
  68
  69                         post_init_pll(pll[m][n][0], pll[m][n][1]);
  70                         post_init_sdram(sclk);
  71                         post_init_uart(sclk);
  72                         post_out_buff("\n\r\0");
  73                         post_out_buff(log[m][n]);
  74                         for (addr = 0x0; addr < CONFIG_SYS_MAX_RAM_SIZE; addr += 4)
  75                                 *(unsigned long *)addr = PATTERN1;
  76                         post_out_buff("Reading...\0");
  77                         for (addr = 0x0; addr < CONFIG_SYS_MAX_RAM_SIZE; addr += 4) {
  78                                 if ((*(unsigned long *)addr) != PATTERN1) {
  79                                         post_out_buff("Error\n\r\0");
  80                                         ret = 0;
  81                                 }
  82                         }
  83                         post_out_buff("OK\n\r\0");
  84                 }
  85         }
  86         if (ret)
  87                 post_out_buff("memory POST passed\n\r\0");
  88         else
  89                 post_out_buff("memory POST failed\n\r\0");
  90
  91         post_out_buff("\n\r\n\r\0");
  92         return 1;
  93 }
  94
  95 void post_init_uart(int sclk)
  96 {
  97         int divisor;
  98
  99         for (divisor = 0; sclk > 0; divisor++)
 100                 sclk -= 57600 * 16;
 101
 102         *pPORTF_FER = 0x000F;
 103         *pPORTH_FER = 0xFFFF;
 104
 105         *pUART_GCTL = 0x00;
 106         *pUART_LCR = 0x83;
 107         SSYNC();
 108         *pUART_DLL = (divisor & 0xFF);
 109         SSYNC();
 110         *pUART_DLH = ((divisor >> 8) & 0xFF);
 111         SSYNC();
 112         *pUART_LCR = 0x03;
 113         SSYNC();
 114         *pUART_GCTL = 0x01;
 115         SSYNC();
 116 }
 117
 118 void post_out_buff(char *buff)
 119 {
 120
 121         int i = 0;
 122         for (i = 0; i < 0x80000; i++) ;
 123         i = 0;
 124         while ((buff[i] != '\0') && (i != 100)) {
 125                 while (!(*pUART_LSR & 0x20)) ;
 126                 *pUART_THR = buff[i];
 127                 SSYNC();
 128                 i++;
 129         }
 130         for (i = 0; i < 0x80000; i++) ;
 131 }
 132
 133 /* Using sw10-PF5 as the hotkey */
 134 #define KEY_LOOP 0x80000
 135 #define KEY_DELAY 0x80
 136 int post_key_pressed(void)
 137 {
 138         int i, n;
 139         unsigned short value;
 140
 141         *pPORTF_FER &= ~PF5;
 142         *pPORTFIO_DIR &= ~PF5;
 143         *pPORTFIO_INEN |= PF5;
 144         SSYNC();
 145
 146         post_out_buff("########Press SW10 to enter Memory POST########: 3\0");
 147         for (i = 0; i < KEY_LOOP; i++) {
 148                 value = *pPORTFIO & PF5;
 149                 if (*pUART0_RBR == 0x0D) {
 150                         value = 0;
 151                         goto key_pressed;
 152                 }
 153                 if (value != 0) {
 154                         goto key_pressed;
 155                 }
 156                 for (n = 0; n < KEY_DELAY; n++)
 157                         asm("nop");
 158         }
 159         post_out_buff("\b2\0");
 160
 161         for (i = 0; i < KEY_LOOP; i++) {
 162                 value = *pPORTFIO & PF5;
 163                 if (*pUART0_RBR == 0x0D) {
 164                         value = 0;
 165                         goto key_pressed;
 166                 }
 167                 if (value != 0) {
 168                         goto key_pressed;
 169                 }
 170                 for (n = 0; n < KEY_DELAY; n++)
 171                         asm("nop");
 172         }
 173         post_out_buff("\b1\0");
 174
 175         for (i = 0; i < KEY_LOOP; i++) {
 176                 value = *pPORTFIO & PF5;
 177                 if (*pUART0_RBR == 0x0D) {
 178                         value = 0;
 179                         goto key_pressed;
 180                 }
 181                 if (value != 0) {
 182                         goto key_pressed;
 183                 }
 184                 for (n = 0; n < KEY_DELAY; n++)
 185                         asm("nop");
 186         }
 187       key_pressed:
 188         post_out_buff("\b0");
 189         post_out_buff("\n\r\0");
 190         if (value == 0)
 191                 return 0;
 192         post_out_buff("Hotkey has been pressed, Enter POST . . . . . .\n\r\0");
 193         return 1;
 194 }
 195
 196 void post_init_pll(int mult, int div)
 197 {
 198
 199         *pSIC_IWR = 0x01;
 200         *pPLL_CTL = (mult << 9);
 201         *pPLL_DIV = div;
 202         asm("CLI R2;");
 203         asm("IDLE;");
 204         asm("STI R2;");
 205         while (!(*pPLL_STAT & 0x20)) ;
 206 }
 207
 208 int post_init_sdram(int sclk)
 209 {
 210         int SDRAM_tRP, SDRAM_tRP_num, SDRAM_tRAS, SDRAM_tRAS_num, SDRAM_tRCD,
 211             SDRAM_tWR;
 212         int SDRAM_Tref, SDRAM_NRA, SDRAM_CL, SDRAM_SIZE, SDRAM_WIDTH,
 213             mem_SDGCTL, mem_SDBCTL, mem_SDRRC;
 214
 215         if ((sclk > 119402985)) {
 216                 SDRAM_tRP = TRP_2;
 217                 SDRAM_tRP_num = 2;
 218                 SDRAM_tRAS = TRAS_7;
 219                 SDRAM_tRAS_num = 7;
 220                 SDRAM_tRCD = TRCD_2;
 221                 SDRAM_tWR = TWR_2;
 222         } else if ((sclk > 104477612) && (sclk <= 119402985)) {
 223                 SDRAM_tRP = TRP_2;
 224                 SDRAM_tRP_num = 2;
 225                 SDRAM_tRAS = TRAS_6;
 226                 SDRAM_tRAS_num = 6;
 227                 SDRAM_tRCD = TRCD_2;
 228                 SDRAM_tWR = TWR_2;
 229         } else if ((sclk > 89552239) && (sclk <= 104477612)) {
 230                 SDRAM_tRP = TRP_2;
 231                 SDRAM_tRP_num = 2;
 232                 SDRAM_tRAS = TRAS_5;
 233                 SDRAM_tRAS_num = 5;
 234                 SDRAM_tRCD = TRCD_2;
 235                 SDRAM_tWR = TWR_2;
 236         } else if ((sclk > 74626866) && (sclk <= 89552239)) {
 237                 SDRAM_tRP = TRP_2;
 238                 SDRAM_tRP_num = 2;
 239                 SDRAM_tRAS = TRAS_4;
 240                 SDRAM_tRAS_num = 4;
 241                 SDRAM_tRCD = TRCD_2;
 242                 SDRAM_tWR = TWR_2;
 243         } else if ((sclk > 66666667) && (sclk <= 74626866)) {
 244                 SDRAM_tRP = TRP_2;
 245                 SDRAM_tRP_num = 2;
 246                 SDRAM_tRAS = TRAS_3;
 247                 SDRAM_tRAS_num = 3;
 248                 SDRAM_tRCD = TRCD_2;
 249                 SDRAM_tWR = TWR_2;
 250         } else if ((sclk > 59701493) && (sclk <= 66666667)) {
 251                 SDRAM_tRP = TRP_1;
 252                 SDRAM_tRP_num = 1;
 253                 SDRAM_tRAS = TRAS_4;
 254                 SDRAM_tRAS_num = 4;
 255                 SDRAM_tRCD = TRCD_1;
 256                 SDRAM_tWR = TWR_2;
 257         } else if ((sclk > 44776119) && (sclk <= 59701493)) {
 258                 SDRAM_tRP = TRP_1;
 259                 SDRAM_tRP_num = 1;
 260                 SDRAM_tRAS = TRAS_3;
 261                 SDRAM_tRAS_num = 3;
 262                 SDRAM_tRCD = TRCD_1;
 263                 SDRAM_tWR = TWR_2;
 264         } else if ((sclk > 29850746) && (sclk <= 44776119)) {
 265                 SDRAM_tRP = TRP_1;
 266                 SDRAM_tRP_num = 1;
 267                 SDRAM_tRAS = TRAS_2;
 268                 SDRAM_tRAS_num = 2;
 269                 SDRAM_tRCD = TRCD_1;
 270                 SDRAM_tWR = TWR_2;
 271         } else if (sclk <= 29850746) {
 272                 SDRAM_tRP = TRP_1;
 273                 SDRAM_tRP_num = 1;
 274                 SDRAM_tRAS = TRAS_1;
 275                 SDRAM_tRAS_num = 1;
 276                 SDRAM_tRCD = TRCD_1;
 277                 SDRAM_tWR = TWR_2;
 278         } else {
 279                 SDRAM_tRP = TRP_1;
 280                 SDRAM_tRP_num = 1;
 281                 SDRAM_tRAS = TRAS_1;
 282                 SDRAM_tRAS_num = 1;
 283                 SDRAM_tRCD = TRCD_1;
 284                 SDRAM_tWR = TWR_2;
 285         }
 286         /*SDRAM INFORMATION: */
 287         SDRAM_Tref = 64;        /* Refresh period in milliseconds */
 288         SDRAM_NRA = 4096;       /* Number of row addresses in SDRAM */
 289         SDRAM_CL = CL_3;        /* 2 */
 290
 291         SDRAM_SIZE = EBSZ_64;
 292         SDRAM_WIDTH = EBCAW_10;
 293
 294         mem_SDBCTL = SDRAM_WIDTH | SDRAM_SIZE | EBE;
 295
 296         /* Equation from section 17 (p17-46) of BF533 HRM */
 297         mem_SDRRC =
 298             (((CONFIG_SCLK_HZ / 1000) * SDRAM_Tref) / SDRAM_NRA) -
 299             (SDRAM_tRAS_num + SDRAM_tRP_num);
 300
 301         /* Enable SCLK Out */
 302         mem_SDGCTL =
 303             (SCTLE | SDRAM_CL | SDRAM_tRAS | SDRAM_tRP | SDRAM_tRCD | SDRAM_tWR
 304              | PSS);
 305
 306         SSYNC();
 307
 308         *pEBIU_SDGCTL |= 0x1000000;
 309         /* Set the SDRAM Refresh Rate control register based on SSCLK value */
 310         *pEBIU_SDRRC = mem_SDRRC;
 311
 312         /* SDRAM Memory Bank Control Register */
 313         *pEBIU_SDBCTL = mem_SDBCTL;
 314
 315         /* SDRAM Memory Global Control Register */
 316         *pEBIU_SDGCTL = mem_SDGCTL;
 317         SSYNC();
 318         return mem_SDRRC;
 319 }
 320
 321 #endif                          /* CONFIG_POST & CONFIG_SYS_POST_MEMORY */
 322 #endif                          /* CONFIG_POST */