arch/blackfin/cpu/initcode.c

   1 /*
   2  * initcode.c - Initialize the processor.  This is usually entails things
   3  * like external memory, voltage regulators, etc...  Note that this file
   4  * cannot make any function calls as it may be executed all by itself by
   5  * the Blackfin's bootrom in LDR format.
   6  *
   7  * Copyright (c) 2004-2011 Analog Devices Inc.
   8  *
   9  * Licensed under the GPL-2 or later.
  10  */
  11
  12 #define BFIN_IN_INITCODE
  13
  14 #include <config.h>
  15 #include <asm/blackfin.h>
  16 #include <asm/mach-common/bits/watchdog.h>
  17 #include <asm/mach-common/bits/bootrom.h>
  18 #include <asm/mach-common/bits/core.h>
  19 #include <asm/serial.h>
  20
  21 #ifndef __ADSPBF60x__
  22 #include <asm/mach-common/bits/ebiu.h>
  23 #include <asm/mach-common/bits/pll.h>
  24 #else /* __ADSPBF60x__ */
  25 #include <asm/mach-common/bits/cgu.h>
  26
  27 #define CONFIG_BFIN_GET_DCLK_M \
  28         ((CONFIG_CLKIN_HZ*CONFIG_VCO_MULT)/(CONFIG_DCLK_DIV*1000000))
  29
  30 #ifndef CONFIG_DMC_DDRCFG
  31 #if ((CONFIG_BFIN_GET_DCLK_M != 125) && \
  32         (CONFIG_BFIN_GET_DCLK_M != 133) && \
  33         (CONFIG_BFIN_GET_DCLK_M != 150) && \
  34         (CONFIG_BFIN_GET_DCLK_M != 166) && \
  35         (CONFIG_BFIN_GET_DCLK_M != 200) && \
  36         (CONFIG_BFIN_GET_DCLK_M != 225) && \
  37         (CONFIG_BFIN_GET_DCLK_M != 250))
  38 #error "DDR2 CLK must be in (125, 133, 150, 166, 200, 225, 250)MHz"
  39 #endif
  40 #endif
  41
  42 /* DMC control bits */
  43 #define SRREQ                   0x8
  44
  45 /* DMC status bits */
  46 #define IDLE                    0x1
  47 #define MEMINITDONE             0x4
  48 #define SRACK                   0x8
  49 #define PDACK                   0x10
  50 #define DPDACK                  0x20
  51 #define DLLCALDONE              0x2000
  52 #define PENDREF                 0xF0000
  53 #define PHYRDPHASE              0xF00000
  54 #define PHYRDPHASE_OFFSET       20
  55
  56 /* DMC DLL control bits */
  57 #define DLLCALRDCNT             0xFF
  58 #define DATACYC_OFFSET          8
  59
  60 struct ddr_config {
  61         u32 ddr_clk;
  62         u32 dmc_ddrctl;
  63         u32 dmc_ddrcfg;
  64         u32 dmc_ddrtr0;
  65         u32 dmc_ddrtr1;
  66         u32 dmc_ddrtr2;
  67         u32 dmc_ddrmr;
  68         u32 dmc_ddrmr1;
  69 };
  70
  71 static struct ddr_config ddr_config_table[] = {
  72         [0] = {
  73                 .ddr_clk    = 125,      /* 125MHz */
  74                 .dmc_ddrctl = 0x00000904,
  75                 .dmc_ddrcfg = 0x00000422,
  76                 .dmc_ddrtr0 = 0x20705212,
  77                 .dmc_ddrtr1 = 0x201003CF,
  78                 .dmc_ddrtr2 = 0x00320107,
  79                 .dmc_ddrmr  = 0x00000422,
  80                 .dmc_ddrmr1 = 0x4,
  81         },
  82         [1] = {
  83                 .ddr_clk    = 133,      /* 133MHz */
  84                 .dmc_ddrctl = 0x00000904,
  85                 .dmc_ddrcfg = 0x00000422,
  86                 .dmc_ddrtr0 = 0x20806313,
  87                 .dmc_ddrtr1 = 0x2013040D,
  88                 .dmc_ddrtr2 = 0x00320108,
  89                 .dmc_ddrmr  = 0x00000632,
  90                 .dmc_ddrmr1 = 0x4,
  91         },
  92         [2] = {
  93                 .ddr_clk    = 150,      /* 150MHz */
  94                 .dmc_ddrctl = 0x00000904,
  95                 .dmc_ddrcfg = 0x00000422,
  96                 .dmc_ddrtr0 = 0x20A07323,
  97                 .dmc_ddrtr1 = 0x20160492,
  98                 .dmc_ddrtr2 = 0x00320209,
  99                 .dmc_ddrmr  = 0x00000632,
 100                 .dmc_ddrmr1 = 0x4,
 101         },
 102         [3] = {
 103                 .ddr_clk    = 166,      /* 166MHz */
 104                 .dmc_ddrctl = 0x00000904,
 105                 .dmc_ddrcfg = 0x00000422,
 106                 .dmc_ddrtr0 = 0x20A07323,
 107                 .dmc_ddrtr1 = 0x2016050E,
 108                 .dmc_ddrtr2 = 0x00320209,
 109                 .dmc_ddrmr  = 0x00000632,
 110                 .dmc_ddrmr1 = 0x4,
 111         },
 112         [4] = {
 113                 .ddr_clk    = 200,      /* 200MHz */
 114                 .dmc_ddrctl = 0x00000904,
 115                 .dmc_ddrcfg = 0x00000422,
 116                 .dmc_ddrtr0 = 0x20a07323,
 117                 .dmc_ddrtr1 = 0x2016050f,
 118                 .dmc_ddrtr2 = 0x00320509,
 119                 .dmc_ddrmr  = 0x00000632,
 120                 .dmc_ddrmr1 = 0x4,
 121         },
 122         [5] = {
 123                 .ddr_clk    = 225,      /* 225MHz */
 124                 .dmc_ddrctl = 0x00000904,
 125                 .dmc_ddrcfg = 0x00000422,
 126                 .dmc_ddrtr0 = 0x20E0A424,
 127                 .dmc_ddrtr1 = 0x302006DB,
 128                 .dmc_ddrtr2 = 0x0032020D,
 129                 .dmc_ddrmr  = 0x00000842,
 130                 .dmc_ddrmr1 = 0x4,
 131         },
 132         [6] = {
 133                 .ddr_clk    = 250,      /* 250MHz */
 134                 .dmc_ddrctl = 0x00000904,
 135                 .dmc_ddrcfg = 0x00000422,
 136                 .dmc_ddrtr0 = 0x20E0A424,
 137                 .dmc_ddrtr1 = 0x3020079E,
 138                 .dmc_ddrtr2 = 0x0032050D,
 139                 .dmc_ddrmr  = 0x00000842,
 140                 .dmc_ddrmr1 = 0x4,
 141         },
 142 };
 143 #endif /* __ADSPBF60x__ */
 144
 145 __attribute__((always_inline))
 146 static inline void serial_init(void)
 147 {
 148 #if defined(__ADSPBF54x__) || defined(__ADSPBF60x__)
 149 # ifdef BFIN_BOOT_UART_USE_RTS
 150 #  define BFIN_UART_USE_RTS 1
 151 # else
 152 #  define BFIN_UART_USE_RTS 0
 153 # endif
 154         if (BFIN_UART_USE_RTS && CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_UART) {
 155                 uint32_t uart_base = UART_BASE;
 156                 size_t i;
 157
 158                 /* force RTS rather than relying on auto RTS */
 159 #if BFIN_UART_HW_VER < 4
 160                 bfin_write16(&pUART->mcr, bfin_read16(&pUART->mcr) | FCPOL);
 161 #else
 162                 bfin_write32(&pUART->control, bfin_read32(&pUART->control) |
 163                                 FCPOL);
 164 #endif
 165
 166                 /* Wait for the line to clear up.  We cannot rely on UART
 167                  * registers as none of them reflect the status of the RSR.
 168                  * Instead, we'll sleep for ~10 bit times at 9600 baud.
 169                  * We can precalc things here by assuming boot values for
 170                  * PLL rather than loading registers and calculating.
 171                  *      baud    = SCLK / (16 ^ (1 - EDBO) * Divisor)
 172                  *      EDB0    = 0
 173                  *      Divisor = (SCLK / baud) / 16
 174                  *      SCLK    = baud * 16 * Divisor
 175                  *      SCLK    = (0x14 * CONFIG_CLKIN_HZ) / 5
 176                  *      CCLK    = (16 * Divisor * 5) * (9600 / 10)
 177                  * In reality, this will probably be just about 1 second delay,
 178                  * so assuming 9600 baud is OK (both as a very low and too high
 179                  * speed as this will buffer things enough).
 180                  */
 181 #define _NUMBITS (10)                                   /* how many bits to delay */
 182 #define _LOWBAUD (9600)                                 /* low baud rate */
 183 #define _SCLK    ((0x14 * CONFIG_CLKIN_HZ) / 5)         /* SCLK based on PLL */
 184 #define _DIVISOR ((_SCLK / _LOWBAUD) / 16)              /* UART DLL/DLH */
 185 #define _NUMINS  (3)                                    /* how many instructions in loop */
 186 #define _CCLK    (((16 * _DIVISOR * 5) * (_LOWBAUD / _NUMBITS)) / _NUMINS)
 187                 i = _CCLK;
 188                 while (i--)
 189                         asm volatile("" : : : "memory");
 190         }
 191 #endif
 192
 193 #if CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_BYPASS
 194         if (BFIN_DEBUG_EARLY_SERIAL) {
 195                 serial_early_init(UART_BASE);
 196                 serial_early_set_baud(UART_BASE, CONFIG_BAUDRATE);
 197         }
 198 #endif
 199 }
 200
 201 __attribute__((always_inline))
 202 static inline void serial_deinit(void)
 203 {
 204 #if defined(__ADSPBF54x__) || defined(__ADSPBF60x__)
 205         uint32_t uart_base = UART_BASE;
 206
 207         if (BFIN_UART_USE_RTS && CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_UART) {
 208                 /* clear forced RTS rather than relying on auto RTS */
 209 #if BFIN_UART_HW_VER < 4
 210                 bfin_write16(&pUART->mcr, bfin_read16(&pUART->mcr) & ~FCPOL);
 211 #else
 212                 bfin_write32(&pUART->control, bfin_read32(&pUART->control) &
 213                                 ~FCPOL);
 214 #endif
 215         }
 216 #endif
 217 }
 218
 219 __attribute__((always_inline))
 220 static inline void serial_putc(char c)
 221 {
 222         uint32_t uart_base = UART_BASE;
 223
 224         if (!BFIN_DEBUG_EARLY_SERIAL)
 225                 return;
 226
 227         if (c == '\n')
 228                 serial_putc('\r');
 229
 230         bfin_write(&pUART->thr, c);
 231
 232         while (!(_lsr_read(pUART) & TEMT))
 233                 continue;
 234 }
 235
 236 #include "initcode.h"
 237
 238 __attribute__((always_inline)) static inline void
 239 program_nmi_handler(void)
 240 {
 241         u32 tmp1, tmp2;
 242
 243         /* Older bootroms don't create a dummy NMI handler,
 244          * so make one ourselves ASAP in case it fires.
 245          */
 246         if (CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_BYPASS && !ANOMALY_05000219)
 247                 return;
 248
 249         asm volatile (
 250                 "%0 = RETS;" /* Save current RETS */
 251                 "CALL 1f;"   /* Figure out current PC */
 252                 "RTN;"       /* The simple NMI handler */
 253                 "1:"
 254                 "%1 = RETS;" /* Load addr of NMI handler */
 255                 "RETS = %0;" /* Restore RETS */
 256                 "[%2] = %1;" /* Write NMI handler */
 257                 : "=d"(tmp1), "=d"(tmp2)
 258                 : "ab"(EVT2)
 259         );
 260 }
 261
 262 /* Max SCLK can be 133MHz ... dividing that by (2*4) gives
 263  * us a freq of 16MHz for SPI which should generally be
 264  * slow enough for the slow reads the bootrom uses.
 265  */
 266 #if !defined(CONFIG_SPI_FLASH_SLOW_READ) && \
 267     ((defined(__ADSPBF52x__) && __SILICON_REVISION__ >= 2) || \
 268      (defined(__ADSPBF54x__) && __SILICON_REVISION__ >= 1))
 269 # define BOOTROM_SUPPORTS_SPI_FAST_READ 1
 270 #else
 271 # define BOOTROM_SUPPORTS_SPI_FAST_READ 0
 272 #endif
 273 #ifndef CONFIG_SPI_BAUD_INITBLOCK
 274 # define CONFIG_SPI_BAUD_INITBLOCK (BOOTROM_SUPPORTS_SPI_FAST_READ ? 2 : 4)
 275 #endif
 276 #ifdef SPI0_BAUD
 277 # define bfin_write_SPI_BAUD bfin_write_SPI0_BAUD
 278 #endif
 279
 280 #ifdef __ADSPBF60x__
 281
 282 #ifndef CONFIG_CGU_CTL_VAL
 283 # define CONFIG_CGU_CTL_VAL ((CONFIG_VCO_MULT << 8) | CONFIG_CLKIN_HALF)
 284 #endif
 285
 286 #ifndef CONFIG_CGU_DIV_VAL
 287 # define CONFIG_CGU_DIV_VAL \
 288         ((CONFIG_CCLK_DIV   << CSEL_P)   | \
 289          (CONFIG_SCLK0_DIV  << S0SEL_P)  | \
 290          (CONFIG_SCLK_DIV << SYSSEL_P) | \
 291          (CONFIG_SCLK1_DIV  << S1SEL_P)  | \
 292          (CONFIG_DCLK_DIV   << DSEL_P)   | \
 293          (CONFIG_OCLK_DIV   << OSEL_P))
 294 #endif
 295
 296 #else /* __ADSPBF60x__ */
 297
 298 /* PLL_DIV defines */
 299 #ifndef CONFIG_PLL_DIV_VAL
 300 # if (CONFIG_CCLK_DIV == 1)
 301 #  define CONFIG_CCLK_ACT_DIV CCLK_DIV1
 302 # elif (CONFIG_CCLK_DIV == 2)
 303 #  define CONFIG_CCLK_ACT_DIV CCLK_DIV2
 304 # elif (CONFIG_CCLK_DIV == 4)
 305 #  define CONFIG_CCLK_ACT_DIV CCLK_DIV4
 306 # elif (CONFIG_CCLK_DIV == 8)
 307 #  define CONFIG_CCLK_ACT_DIV CCLK_DIV8
 308 # else
 309 #  define CONFIG_CCLK_ACT_DIV CONFIG_CCLK_DIV_not_defined_properly
 310 # endif
 311 # define CONFIG_PLL_DIV_VAL (CONFIG_CCLK_ACT_DIV | CONFIG_SCLK_DIV)
 312 #endif
 313
 314 #ifndef CONFIG_PLL_LOCKCNT_VAL
 315 # define CONFIG_PLL_LOCKCNT_VAL 0x0300
 316 #endif
 317
 318 #ifndef CONFIG_PLL_CTL_VAL
 319 # define CONFIG_PLL_CTL_VAL (SPORT_HYST | (CONFIG_VCO_MULT << 9) | CONFIG_CLKIN_HALF)
 320 #endif
 321
 322 /* Make sure our voltage value is sane so we don't blow up! */
 323 #ifndef CONFIG_VR_CTL_VAL
 324 # define BFIN_CCLK ((CONFIG_CLKIN_HZ * CONFIG_VCO_MULT) / CONFIG_CCLK_DIV)
 325 # if defined(__ADSPBF533__) || defined(__ADSPBF532__) || defined(__ADSPBF531__)
 326 #  define CCLK_VLEV_120 400000000
 327 #  define CCLK_VLEV_125 533000000
 328 # elif defined(__ADSPBF537__) || defined(__ADSPBF536__) || defined(__ADSPBF534__)
 329 #  define CCLK_VLEV_120 401000000
 330 #  define CCLK_VLEV_125 401000000
 331 # elif defined(__ADSPBF561__)
 332 #  define CCLK_VLEV_120 300000000
 333 #  define CCLK_VLEV_125 501000000
 334 # endif
 335 # if BFIN_CCLK < CCLK_VLEV_120
 336 #  define CONFIG_VR_CTL_VLEV VLEV_120
 337 # elif BFIN_CCLK < CCLK_VLEV_125
 338 #  define CONFIG_VR_CTL_VLEV VLEV_125
 339 # else
 340 #  define CONFIG_VR_CTL_VLEV VLEV_130
 341 # endif
 342 # if defined(__ADSPBF52x__)     /* TBD; use default */
 343 #  undef CONFIG_VR_CTL_VLEV
 344 #  define CONFIG_VR_CTL_VLEV VLEV_110
 345 # elif defined(__ADSPBF54x__)   /* TBD; use default */
 346 #  undef CONFIG_VR_CTL_VLEV
 347 #  define CONFIG_VR_CTL_VLEV VLEV_120
 348 # elif defined(__ADSPBF538__) || defined(__ADSPBF539__) /* TBD; use default */
 349 #  undef CONFIG_VR_CTL_VLEV
 350 #  define CONFIG_VR_CTL_VLEV VLEV_125
 351 # endif
 352
 353 # ifdef CONFIG_BFIN_MAC
 354 #  define CONFIG_VR_CTL_CLKBUF CLKBUFOE
 355 # else
 356 #  define CONFIG_VR_CTL_CLKBUF 0
 357 # endif
 358
 359 # if defined(__ADSPBF52x__)
 360 #  define CONFIG_VR_CTL_FREQ FREQ_1000
 361 # else
 362 #  define CONFIG_VR_CTL_FREQ (GAIN_20 | FREQ_1000)
 363 # endif
 364
 365 # define CONFIG_VR_CTL_VAL (CONFIG_VR_CTL_CLKBUF | CONFIG_VR_CTL_VLEV | CONFIG_VR_CTL_FREQ)
 366 #endif
 367
 368 /* some parts do not have an on-chip voltage regulator */
 369 #if defined(__ADSPBF51x__)
 370 # define CONFIG_HAS_VR 0
 371 # undef CONFIG_VR_CTL_VAL
 372 # define CONFIG_VR_CTL_VAL 0
 373 #else
 374 # define CONFIG_HAS_VR 1
 375 #endif
 376
 377 #if CONFIG_MEM_SIZE
 378 #ifndef EBIU_RSTCTL
 379 /* Blackfin with SDRAM */
 380 #ifndef CONFIG_EBIU_SDBCTL_VAL
 381 # if CONFIG_MEM_SIZE == 16
 382 #  define CONFIG_EBSZ_VAL EBSZ_16
 383 # elif CONFIG_MEM_SIZE == 32
 384 #  define CONFIG_EBSZ_VAL EBSZ_32
 385 # elif CONFIG_MEM_SIZE == 64
 386 #  define CONFIG_EBSZ_VAL EBSZ_64
 387 # elif CONFIG_MEM_SIZE == 128
 388 #  define CONFIG_EBSZ_VAL EBSZ_128
 389 # elif CONFIG_MEM_SIZE == 256
 390 #  define CONFIG_EBSZ_VAL EBSZ_256
 391 # elif CONFIG_MEM_SIZE == 512
 392 #  define CONFIG_EBSZ_VAL EBSZ_512
 393 # else
 394 #  error You need to define CONFIG_EBIU_SDBCTL_VAL or CONFIG_MEM_SIZE
 395 # endif
 396 # if CONFIG_MEM_ADD_WDTH == 8
 397 #  define CONFIG_EBCAW_VAL EBCAW_8
 398 # elif CONFIG_MEM_ADD_WDTH == 9
 399 #  define CONFIG_EBCAW_VAL EBCAW_9
 400 # elif CONFIG_MEM_ADD_WDTH == 10
 401 #  define CONFIG_EBCAW_VAL EBCAW_10
 402 # elif CONFIG_MEM_ADD_WDTH == 11
 403 #  define CONFIG_EBCAW_VAL EBCAW_11
 404 # else
 405 #  error You need to define CONFIG_EBIU_SDBCTL_VAL or CONFIG_MEM_ADD_WDTH
 406 # endif
 407 # define CONFIG_EBIU_SDBCTL_VAL (CONFIG_EBCAW_VAL | CONFIG_EBSZ_VAL | EBE)
 408 #endif
 409 #endif
 410 #endif
 411
 412 /* Conflicting Column Address Widths Causes SDRAM Errors:
 413  * EB2CAW and EB3CAW must be the same
 414  */
 415 #if ANOMALY_05000362
 416 # if ((CONFIG_EBIU_SDBCTL_VAL & 0x30000000) >> 8) != (CONFIG_EBIU_SDBCTL_VAL & 0x00300000)
 417 #  error "Anomaly 05000362: EB2CAW and EB3CAW must be the same"
 418 # endif
 419 #endif
 420
 421 #endif /*  __ADSPBF60x__ */
 422
 423 __attribute__((always_inline)) static inline void
 424 program_early_devices(ADI_BOOT_DATA *bs, uint *sdivB, uint *divB, uint *vcoB)
 425 {
 426         serial_putc('a');
 427
 428         /* Save the clock pieces that are used in baud rate calculation */
 429         if (BFIN_DEBUG_EARLY_SERIAL || CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_UART) {
 430                 serial_putc('b');
 431 #ifdef __ADSPBF60x__
 432                 *sdivB = bfin_read_CGU_DIV();
 433                 *sdivB = ((*sdivB >> 8) & 0x1f) * ((*sdivB >> 5) & 0x7);
 434                 *vcoB = (bfin_read_CGU_CTL() >> 8) & 0x7f;
 435 #else
 436                 *sdivB = bfin_read_PLL_DIV() & 0xf;
 437                 *vcoB = (bfin_read_PLL_CTL() >> 9) & 0x3f;
 438 #endif
 439                 *divB = serial_early_get_div();
 440                 serial_putc('c');
 441         }
 442
 443         serial_putc('d');
 444
 445 #ifdef CONFIG_HW_WATCHDOG
 446 # ifndef CONFIG_HW_WATCHDOG_TIMEOUT_INITCODE
 447 #  define CONFIG_HW_WATCHDOG_TIMEOUT_INITCODE 20000
 448 # endif
 449         /* Program the watchdog with an initial timeout of ~20 seconds.
 450          * Hopefully that should be long enough to load the u-boot LDR
 451          * (from wherever) and then the common u-boot code can take over.
 452          * In bypass mode, the start.S would have already set a much lower
 453          * timeout, so don't clobber that.
 454          */
 455         if (CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_BYPASS) {
 456                 serial_putc('e');
 457 #ifdef __ADSPBF60x__
 458                 /* Reset system event controller */
 459                 bfin_write_SEC_GCTL(0x2);
 460                 bfin_write_SEC_CCTL(0x2);
 461                 SSYNC();
 462
 463                 /* Enable fault event input and system reset action in fault
 464                  * controller. Route watchdog timeout event to fault interface.
 465                  */
 466                 bfin_write_SEC_FCTL(0xc1);
 467                 /* Enable watchdog interrupt source */
 468                 bfin_write_SEC_SCTL(2, bfin_read_SEC_SCTL(2) | 0x6);
 469                 SSYNC();
 470
 471                 /* Enable system event controller */
 472                 bfin_write_SEC_GCTL(0x1);
 473                 bfin_write_SEC_CCTL(0x1);
 474                 SSYNC();
 475 #endif
 476                 bfin_write_WDOG_CTL(WDDIS);
 477                 SSYNC();
 478                 bfin_write_WDOG_CNT(MSEC_TO_SCLK(CONFIG_HW_WATCHDOG_TIMEOUT_INITCODE));
 479 #if CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_UART
 480                 bfin_write_WDOG_CTL(WDEN);
 481 #endif
 482                 serial_putc('f');
 483         }
 484 #endif
 485
 486         serial_putc('g');
 487
 488         /* Blackfin bootroms use the SPI slow read opcode instead of the SPI
 489          * fast read, so we need to slow down the SPI clock a lot more during
 490          * boot.  Once we switch over to u-boot's SPI flash driver, we'll
 491          * increase the speed appropriately.
 492          */
 493 #ifdef SPI_BAUD
 494         if (CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_SPI_MASTER) {
 495                 serial_putc('h');
 496                 if (BOOTROM_SUPPORTS_SPI_FAST_READ && CONFIG_SPI_BAUD_INITBLOCK < 4)
 497                         bs->dFlags |= BFLAG_FASTREAD;
 498                 bfin_write_SPI_BAUD(CONFIG_SPI_BAUD_INITBLOCK);
 499                 serial_putc('i');
 500         }
 501 #endif
 502
 503         serial_putc('j');
 504 }
 505
 506 __attribute__((always_inline)) static inline bool
 507 maybe_self_refresh(ADI_BOOT_DATA *bs)
 508 {
 509         serial_putc('a');
 510
 511         if (!CONFIG_MEM_SIZE)
 512                 return false;
 513
 514 #ifdef __ADSPBF60x__
 515         /* resume from hibernate, return false let ddr initialize */
 516         if ((bfin_read32(DPM0_STAT) & 0xF0) == 0x50) {
 517                 serial_putc('b');
 518                 return false;
 519         }
 520
 521 #else /* __ADSPBF60x__ */
 522
 523         /* If external memory is enabled, put it into self refresh first. */
 524 #if defined(EBIU_RSTCTL)
 525         if (bfin_read_EBIU_RSTCTL() & DDR_SRESET) {
 526                 serial_putc('b');
 527                 bfin_write_EBIU_RSTCTL(bfin_read_EBIU_RSTCTL() | SRREQ);
 528                 return true;
 529         }
 530 #elif defined(EBIU_SDGCTL)
 531         if (bfin_read_EBIU_SDBCTL() & EBE) {
 532                 serial_putc('b');
 533                 bfin_write_EBIU_SDGCTL(bfin_read_EBIU_SDGCTL() | SRFS);
 534                 return true;
 535         }
 536 #endif
 537
 538 #endif /* __ADSPBF60x__ */
 539         serial_putc('c');
 540
 541         return false;
 542 }
 543
 544 __attribute__((always_inline)) static inline u16
 545 program_clocks(ADI_BOOT_DATA *bs, bool put_into_srfs)
 546 {
 547         u16 vr_ctl = 0;
 548
 549         serial_putc('a');
 550
 551 #ifdef __ADSPBF60x__
 552         if (bfin_read_DMC0_STAT() & MEMINITDONE) {
 553                 bfin_write_DMC0_CTL(bfin_read_DMC0_CTL() | SRREQ);
 554                 SSYNC();
 555                 while (!(bfin_read_DMC0_STAT() & SRACK))
 556                         continue;
 557         }
 558
 559         /* Don't set the same value of MSEL and DF to CGU_CTL */
 560         if ((bfin_read_CGU_CTL() & (MSEL_MASK | DF_MASK))
 561                         != CONFIG_CGU_CTL_VAL) {
 562                 bfin_write_CGU_DIV(CONFIG_CGU_DIV_VAL);
 563                 bfin_write_CGU_CTL(CONFIG_CGU_CTL_VAL);
 564                 while ((bfin_read_CGU_STAT() & (CLKSALGN | PLLBP)) ||
 565                                 !(bfin_read_CGU_STAT() & PLLLK))
 566                         continue;
 567         }
 568
 569         bfin_write_CGU_DIV(CONFIG_CGU_DIV_VAL | UPDT);
 570         while (bfin_read_CGU_STAT() & CLKSALGN)
 571                 continue;
 572
 573         if (bfin_read_DMC0_STAT() & MEMINITDONE) {
 574                 bfin_write_DMC0_CTL(bfin_read_DMC0_CTL() & ~SRREQ);
 575                 SSYNC();
 576                 while (bfin_read_DMC0_STAT() & SRACK)
 577                         continue;
 578         }
 579
 580 #else /* __ADSPBF60x__ */
 581
 582         vr_ctl = bfin_read_VR_CTL();
 583
 584         serial_putc('b');
 585
 586         /* If we're entering self refresh, make sure it has happened. */
 587         if (put_into_srfs)
 588 #if defined(EBIU_RSTCTL)
 589                 while (!(bfin_read_EBIU_RSTCTL() & SRACK))
 590                         continue;
 591 #elif defined(EBIU_SDGCTL)
 592                 while (!(bfin_read_EBIU_SDSTAT() & SDSRA))
 593                         continue;
 594 #else
 595                 ;
 596 #endif
 597
 598         serial_putc('c');
 599
 600         /* With newer bootroms, we use the helper function to set up
 601          * the memory controller.  Older bootroms lacks such helpers
 602          * so we do it ourselves.
 603          */
 604         if (!ANOMALY_05000386) {
 605                 serial_putc('d');
 606
 607                 /* Always programming PLL_LOCKCNT avoids Anomaly 05000430 */
 608                 ADI_SYSCTRL_VALUES memory_settings;
 609                 uint32_t actions = SYSCTRL_WRITE | SYSCTRL_PLLCTL | SYSCTRL_LOCKCNT;
 610                 if (!ANOMALY_05000440)
 611                         actions |= SYSCTRL_PLLDIV;
 612                 if (CONFIG_HAS_VR) {
 613                         actions |= SYSCTRL_VRCTL;
 614                         if (CONFIG_VR_CTL_VAL & FREQ_MASK)
 615                                 actions |= SYSCTRL_INTVOLTAGE;
 616                         else
 617                                 actions |= SYSCTRL_EXTVOLTAGE;
 618                         memory_settings.uwVrCtl = CONFIG_VR_CTL_VAL;
 619                 } else
 620                         actions |= SYSCTRL_EXTVOLTAGE;
 621                 memory_settings.uwPllCtl = CONFIG_PLL_CTL_VAL;
 622                 memory_settings.uwPllDiv = CONFIG_PLL_DIV_VAL;
 623                 memory_settings.uwPllLockCnt = CONFIG_PLL_LOCKCNT_VAL;
 624 #if ANOMALY_05000432
 625                 bfin_write_SIC_IWR1(0);
 626 #endif
 627                 serial_putc('e');
 628                 bfrom_SysControl(actions, &memory_settings, NULL);
 629                 serial_putc('f');
 630                 if (ANOMALY_05000440)
 631                         bfin_write_PLL_DIV(CONFIG_PLL_DIV_VAL);
 632 #if ANOMALY_05000432
 633                 bfin_write_SIC_IWR1(-1);
 634 #endif
 635 #if ANOMALY_05000171
 636                 bfin_write_SICA_IWR0(-1);
 637                 bfin_write_SICA_IWR1(-1);
 638 #endif
 639                 serial_putc('g');
 640         } else {
 641                 serial_putc('h');
 642
 643                 /* Disable all peripheral wakeups except for the PLL event. */
 644 #ifdef SIC_IWR0
 645                 bfin_write_SIC_IWR0(1);
 646                 bfin_write_SIC_IWR1(0);
 647 # ifdef SIC_IWR2
 648                 bfin_write_SIC_IWR2(0);
 649 # endif
 650 #elif defined(SICA_IWR0)
 651                 bfin_write_SICA_IWR0(1);
 652                 bfin_write_SICA_IWR1(0);
 653 #elif defined(SIC_IWR)
 654                 bfin_write_SIC_IWR(1);
 655 #endif
 656
 657                 serial_putc('i');
 658
 659                 /* Always programming PLL_LOCKCNT avoids Anomaly 05000430 */
 660                 bfin_write_PLL_LOCKCNT(CONFIG_PLL_LOCKCNT_VAL);
 661
 662                 serial_putc('j');
 663
 664                 /* Only reprogram when needed to avoid triggering unnecessary
 665                  * PLL relock sequences.
 666                  */
 667                 if (vr_ctl != CONFIG_VR_CTL_VAL) {
 668                         serial_putc('?');
 669                         bfin_write_VR_CTL(CONFIG_VR_CTL_VAL);
 670                         asm("idle;");
 671                         serial_putc('!');
 672                 }
 673
 674                 serial_putc('k');
 675
 676                 bfin_write_PLL_DIV(CONFIG_PLL_DIV_VAL);
 677
 678                 serial_putc('l');
 679
 680                 /* Only reprogram when needed to avoid triggering unnecessary
 681                  * PLL relock sequences.
 682                  */
 683                 if (ANOMALY_05000242 || bfin_read_PLL_CTL() != CONFIG_PLL_CTL_VAL) {
 684                         serial_putc('?');
 685                         bfin_write_PLL_CTL(CONFIG_PLL_CTL_VAL);
 686                         asm("idle;");
 687                         serial_putc('!');
 688                 }
 689
 690                 serial_putc('m');
 691
 692                 /* Restore all peripheral wakeups. */
 693 #ifdef SIC_IWR0
 694                 bfin_write_SIC_IWR0(-1);
 695                 bfin_write_SIC_IWR1(-1);
 696 # ifdef SIC_IWR2
 697                 bfin_write_SIC_IWR2(-1);
 698 # endif
 699 #elif defined(SICA_IWR0)
 700                 bfin_write_SICA_IWR0(-1);
 701                 bfin_write_SICA_IWR1(-1);
 702 #elif defined(SIC_IWR)
 703                 bfin_write_SIC_IWR(-1);
 704 #endif
 705
 706                 serial_putc('n');
 707         }
 708
 709 #endif /* __ADSPBF60x__ */
 710
 711         serial_putc('o');
 712
 713         return vr_ctl;
 714 }
 715
 716 __attribute__((always_inline)) static inline void
 717 update_serial_clocks(ADI_BOOT_DATA *bs, uint sdivB, uint divB, uint vcoB)
 718 {
 719         /* Since we've changed the SCLK above, we may need to update
 720          * the UART divisors (UART baud rates are based on SCLK).
 721          * Do the division by hand as there are no native instructions
 722          * for dividing which means we'd generate a libgcc reference.
 723          */
 724         unsigned int sdivR, vcoR;
 725         unsigned int dividend;
 726         unsigned int divisor;
 727         unsigned int quotient;
 728
 729         serial_putc('a');
 730
 731         if (BFIN_DEBUG_EARLY_SERIAL ||
 732                 CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_UART) {
 733 #ifdef __ADSPBF60x__
 734         sdivR = bfin_read_CGU_DIV();
 735         sdivR = ((sdivR >> 8) & 0x1f) * ((sdivR >> 5) & 0x7);
 736         vcoR = (bfin_read_CGU_CTL() >> 8) & 0x7f;
 737 #else
 738         sdivR = bfin_read_PLL_DIV() & 0xf;
 739         vcoR = (bfin_read_PLL_CTL() >> 9) & 0x3f;
 740 #endif
 741
 742         dividend = sdivB * divB * vcoR;
 743         divisor = vcoB * sdivR;
 744         quotient = early_division(dividend, divisor);
 745         serial_early_put_div(quotient - ANOMALY_05000230);
 746         }
 747
 748         serial_putc('c');
 749 }
 750
 751 __attribute__((always_inline)) static inline void
 752 program_memory_controller(ADI_BOOT_DATA *bs, bool put_into_srfs)
 753 {
 754         serial_putc('a');
 755
 756         if (!CONFIG_MEM_SIZE)
 757                 return;
 758
 759         serial_putc('b');
 760
 761 #ifdef __ADSPBF60x__
 762         int dlldatacycle;
 763         int dll_ctl;
 764         int i = 0;
 765
 766         if (CONFIG_BFIN_GET_DCLK_M ==  125)
 767                 i = 0;
 768         else if (CONFIG_BFIN_GET_DCLK_M ==  133)
 769                 i = 1;
 770         else if (CONFIG_BFIN_GET_DCLK_M ==  150)
 771                 i = 2;
 772         else if (CONFIG_BFIN_GET_DCLK_M ==  166)
 773                 i = 3;
 774         else if (CONFIG_BFIN_GET_DCLK_M ==  200)
 775                 i = 4;
 776         else if (CONFIG_BFIN_GET_DCLK_M ==  225)
 777                 i = 5;
 778         else if (CONFIG_BFIN_GET_DCLK_M ==  250)
 779                 i = 6;
 780
 781 #if 0
 782         for (i = 0; i < ARRAY_SIZE(ddr_config_table); i++)
 783                 if (CONFIG_BFIN_GET_DCLK_M == ddr_config_table[i].ddr_clk)
 784                         break;
 785 #endif
 786
 787 #ifndef CONFIG_DMC_DDRCFG
 788         bfin_write_DMC0_CFG(ddr_config_table[i].dmc_ddrcfg);
 789 #else
 790         bfin_write_DMC0_CFG(CONFIG_DMC_DDRCFG);
 791 #endif
 792 #ifndef CONFIG_DMC_DDRTR0
 793         bfin_write_DMC0_TR0(ddr_config_table[i].dmc_ddrtr0);
 794 #else
 795         bfin_write_DMC0_TR0(CONFIG_DMC_DDRTR0);
 796 #endif
 797 #ifndef CONFIG_DMC_DDRTR1
 798         bfin_write_DMC0_TR1(ddr_config_table[i].dmc_ddrtr1);
 799 #else
 800         bfin_write_DMC0_TR1(CONFIG_DMC_DDRTR1);
 801 #endif
 802 #ifndef CONFIG_DMC_DDRTR2
 803         bfin_write_DMC0_TR2(ddr_config_table[i].dmc_ddrtr2);
 804 #else
 805         bfin_write_DMC0_TR2(CONFIG_DMC_DDRTR2);
 806 #endif
 807 #ifndef CONFIG_DMC_DDRMR
 808         bfin_write_DMC0_MR(ddr_config_table[i].dmc_ddrmr);
 809 #else
 810         bfin_write_DMC0_MR(CONFIG_DMC_DDRMR);
 811 #endif
 812 #ifndef CONFIG_DMC_DDREMR1
 813         bfin_write_DMC0_EMR1(ddr_config_table[i].dmc_ddrmr1);
 814 #else
 815         bfin_write_DMC0_EMR1(CONFIG_DMC_DDREMR1);
 816 #endif
 817 #ifndef CONFIG_DMC_DDRCTL
 818         bfin_write_DMC0_CTL(ddr_config_table[i].dmc_ddrctl);
 819 #else
 820         bfin_write_DMC0_CTL(CONFIG_DMC_DDRCTL);
 821 #endif
 822
 823         SSYNC();
 824         while (!(bfin_read_DMC0_STAT() & MEMINITDONE))
 825                 continue;
 826
 827         dlldatacycle = (bfin_read_DMC0_STAT() & PHYRDPHASE) >>
 828                         PHYRDPHASE_OFFSET;
 829         dll_ctl = bfin_read_DMC0_DLLCTL();
 830         dll_ctl &= 0x0ff;
 831         bfin_write_DMC0_DLLCTL(dll_ctl | (dlldatacycle << DATACYC_OFFSET));
 832
 833         SSYNC();
 834         while (!(bfin_read_DMC0_STAT() & DLLCALDONE))
 835                 continue;
 836         serial_putc('!');
 837
 838 #else /* __ADSPBF60x__ */
 839
 840         /* Program the external memory controller before we come out of
 841          * self-refresh.  This only works with our SDRAM controller.
 842          */
 843 #ifdef EBIU_SDGCTL
 844 # ifdef CONFIG_EBIU_SDRRC_VAL
 845         bfin_write_EBIU_SDRRC(CONFIG_EBIU_SDRRC_VAL);
 846 # endif
 847 # ifdef CONFIG_EBIU_SDBCTL_VAL
 848         bfin_write_EBIU_SDBCTL(CONFIG_EBIU_SDBCTL_VAL);
 849 # endif
 850 # ifdef CONFIG_EBIU_SDGCTL_VAL
 851         bfin_write_EBIU_SDGCTL(CONFIG_EBIU_SDGCTL_VAL);
 852 # endif
 853 #endif
 854
 855         serial_putc('c');
 856
 857         /* Now that we've reprogrammed, take things out of self refresh. */
 858         if (put_into_srfs)
 859 #if defined(EBIU_RSTCTL)
 860                 bfin_write_EBIU_RSTCTL(bfin_read_EBIU_RSTCTL() & ~(SRREQ));
 861 #elif defined(EBIU_SDGCTL)
 862                 bfin_write_EBIU_SDGCTL(bfin_read_EBIU_SDGCTL() & ~(SRFS));
 863 #endif
 864
 865         serial_putc('d');
 866
 867         /* Our DDR controller sucks and cannot be programmed while in
 868          * self-refresh.  So we have to pull it out before programming.
 869          */
 870 #ifdef EBIU_RSTCTL
 871 # ifdef CONFIG_EBIU_RSTCTL_VAL
 872         bfin_write_EBIU_RSTCTL(bfin_read_EBIU_RSTCTL() | 0x1 /*DDRSRESET*/ | CONFIG_EBIU_RSTCTL_VAL);
 873 # endif
 874 # ifdef CONFIG_EBIU_DDRCTL0_VAL
 875         bfin_write_EBIU_DDRCTL0(CONFIG_EBIU_DDRCTL0_VAL);
 876 # endif
 877 # ifdef CONFIG_EBIU_DDRCTL1_VAL
 878         bfin_write_EBIU_DDRCTL1(CONFIG_EBIU_DDRCTL1_VAL);
 879 # endif
 880 # ifdef CONFIG_EBIU_DDRCTL2_VAL
 881         bfin_write_EBIU_DDRCTL2(CONFIG_EBIU_DDRCTL2_VAL);
 882 # endif
 883 # ifdef CONFIG_EBIU_DDRCTL3_VAL
 884         /* default is disable, so don't need to force this */
 885         bfin_write_EBIU_DDRCTL3(CONFIG_EBIU_DDRCTL3_VAL);
 886 # endif
 887 # ifdef CONFIG_EBIU_DDRQUE_VAL
 888         bfin_write_EBIU_DDRQUE(bfin_read_EBIU_DDRQUE() | CONFIG_EBIU_DDRQUE_VAL);
 889 # endif
 890 #endif
 891
 892 #endif /* __ADSPBF60x__ */
 893         serial_putc('e');
 894 }
 895
 896 __attribute__((always_inline)) static inline void
 897 check_hibernation(ADI_BOOT_DATA *bs, u16 vr_ctl, bool put_into_srfs)
 898 {
 899         serial_putc('a');
 900
 901         if (!CONFIG_MEM_SIZE)
 902                 return;
 903
 904         serial_putc('b');
 905 #ifdef __ADSPBF60x__
 906         if (bfin_read32(DPM0_RESTORE0) != 0) {
 907                 uint32_t reg = bfin_read_DMC0_CTL();
 908                 reg &= ~0x8;
 909                 bfin_write_DMC0_CTL(reg);
 910
 911                 while ((bfin_read_DMC0_STAT() & 0x8))
 912                         continue;
 913                 while (!(bfin_read_DMC0_STAT() & 0x1))
 914                         continue;
 915
 916                 serial_putc('z');
 917                 uint32_t *hibernate_magic =
 918                         (uint32_t *)bfin_read32(DPM0_RESTORE4);
 919                 SSYNC(); /* make sure memory controller is done */
 920                 if (hibernate_magic[0] == 0xDEADBEEF) {
 921                         serial_putc('c');
 922                         SSYNC();
 923                         bfin_write_EVT15(hibernate_magic[1]);
 924                         bfin_write_IMASK(EVT_IVG15);
 925                         __asm__ __volatile__ (
 926                                 /* load reti early to avoid anomaly 281 */
 927                                 "reti = %2;"
 928                                 /* clear hibernate magic */
 929                                 "[%0] = %1;"
 930                                 /* load stack pointer */
 931                                 "SP = [%0 + 8];"
 932                                 /* lower ourselves from reset ivg to ivg15 */
 933                                 "raise 15;"
 934                                 "nop;nop;nop;"
 935                                 "rti;"
 936                                 :
 937                                 : "p"(hibernate_magic),
 938                                 "d"(0x2000 /* jump.s 0 */),
 939                                 "d"(0xffa00000)
 940                         );
 941                 }
 942
 943
 944         }
 945 #else
 946         /* Are we coming out of hibernate (suspend to memory) ?
 947          * The memory layout is:
 948          * 0x0: hibernate magic for anomaly 307 (0xDEADBEEF)
 949          * 0x4: return address
 950          * 0x8: stack pointer
 951          *
 952          * SCKELOW is unreliable on older parts (anomaly 307)
 953          */
 954         if (ANOMALY_05000307 || vr_ctl & 0x8000) {
 955                 uint32_t *hibernate_magic = 0;
 956
 957                 SSYNC();
 958                 if (hibernate_magic[0] == 0xDEADBEEF) {
 959                         serial_putc('c');
 960                         bfin_write_EVT15(hibernate_magic[1]);
 961                         bfin_write_IMASK(EVT_IVG15);
 962                         __asm__ __volatile__ (
 963                                 /* load reti early to avoid anomaly 281 */
 964                                 "reti = %0;"
 965                                 /* clear hibernate magic */
 966                                 "[%0] = %1;"
 967                                 /* load stack pointer */
 968                                 "SP = [%0 + 8];"
 969                                 /* lower ourselves from reset ivg to ivg15 */
 970                                 "raise 15;"
 971                                 "rti;"
 972                                 :
 973                                 : "p"(hibernate_magic), "d"(0x2000 /* jump.s 0 */)
 974                         );
 975                 }
 976                 serial_putc('d');
 977         }
 978 #endif
 979
 980         serial_putc('e');
 981 }
 982
 983 BOOTROM_CALLED_FUNC_ATTR
 984 void initcode(ADI_BOOT_DATA *bs)
 985 {
 986         ADI_BOOT_DATA bootstruct_scratch;
 987
 988         /* Setup NMI handler before anything else */
 989         program_nmi_handler();
 990
 991         serial_init();
 992
 993         serial_putc('A');
 994
 995         /* If the bootstruct is NULL, then it's because we're loading
 996          * dynamically and not via LDR (bootrom).  So set the struct to
 997          * some scratch space.
 998          */
 999         if (!bs)
1000                 bs = &bootstruct_scratch;
1001
1002         serial_putc('B');
1003         bool put_into_srfs = maybe_self_refresh(bs);
1004
1005         serial_putc('C');
1006         uint sdivB, divB, vcoB;
1007         program_early_devices(bs, &sdivB, &divB, &vcoB);
1008
1009         serial_putc('D');
1010         u16 vr_ctl = program_clocks(bs, put_into_srfs);
1011
1012         serial_putc('E');
1013         update_serial_clocks(bs, sdivB, divB, vcoB);
1014
1015         serial_putc('F');
1016         program_memory_controller(bs, put_into_srfs);
1017
1018         serial_putc('G');
1019         check_hibernation(bs, vr_ctl, put_into_srfs);
1020
1021         serial_putc('H');
1022         program_async_controller(bs);
1023
1024 #ifdef CONFIG_BFIN_BOOTROM_USES_EVT1
1025         serial_putc('I');
1026         /* Tell the bootrom where our entry point is so that it knows
1027          * where to jump to when finishing processing the LDR.  This
1028          * allows us to avoid small jump blocks in the LDR, and also
1029          * works around anomaly 05000389 (init address in external
1030          * memory causes bootrom to trigger external addressing IVHW).
1031          */
1032         if (CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_BYPASS)
1033                 bfin_write_EVT1(CONFIG_SYS_MONITOR_BASE);
1034 #endif
1035
1036         serial_putc('>');
1037         serial_putc('\n');
1038
1039         serial_deinit();
1040 }