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   1 /*
   2  * File:         arch/blackfin/mach-common/dpmc.S
   3  * Based on:
   4  * Author:       LG Soft India
   5  *
   6  * Created:      ?
   7  * Description:  Watchdog Timer APIs
   8  *
   9  * Modified:
  10  *               Copyright 2004-2006 Analog Devices Inc.
  11  *
  12  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, see the file COPYING, or write
  26  * to the Free Software Foundation, Inc.,
  27  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  28  */
  29
  30 #include <linux/linkage.h>
  31 #include <asm/blackfin.h>
  32 #include <asm/mach/irq.h>
  33
  34 .text
  35
  36 ENTRY(_unmask_wdog_wakeup_evt)
  37         [--SP] = ( R7:0, P5:0 );
  38 #if defined(CONFIG_BF561)
  39         P0.H = hi(SICA_IWR1);
  40         P0.L = lo(SICA_IWR1);
  41 #elif defined(CONFIG_BF54x) || defined(CONFIG_BF52x)
  42         P0.h = HI(SIC_IWR0);
  43         P0.l = LO(SIC_IWR0);
  44 #else
  45         P0.h = HI(SIC_IWR);
  46         P0.l = LO(SIC_IWR);
  47 #endif
  48         R7 = [P0];
  49 #if defined(CONFIG_BF561)
  50         BITSET(R7, 27);
  51 #else
  52         BITSET(R7,(IRQ_WATCH - IVG7));
  53 #endif
  54         [P0] = R7;
  55         SSYNC;
  56
  57         ( R7:0, P5:0 ) = [SP++];
  58         RTS;
  59
  60 .LWRITE_TO_STAT:
  61         /* When watch dog timer is enabled, a write to STAT will load the
  62          * contents of CNT to STAT
  63          */
  64         R7 = 0x0000(z);
  65 #if defined(CONFIG_BF561)
  66         P0.h = HI(WDOGA_STAT);
  67         P0.l = LO(WDOGA_STAT);
  68 #else
  69         P0.h = HI(WDOG_STAT);
  70         P0.l = LO(WDOG_STAT);
  71 #endif
  72         [P0] = R7;
  73         SSYNC;
  74         JUMP .LSKIP_WRITE_TO_STAT;
  75
  76 ENTRY(_program_wdog_timer)
  77         [--SP] = ( R7:0, P5:0 );
  78 #if defined(CONFIG_BF561)
  79         P0.h = HI(WDOGA_CNT);
  80         P0.l = LO(WDOGA_CNT);
  81 #else
  82         P0.h = HI(WDOG_CNT);
  83         P0.l = LO(WDOG_CNT);
  84 #endif
  85         [P0] = R0;
  86         SSYNC;
  87
  88 #if defined(CONFIG_BF561)
  89         P0.h = HI(WDOGA_CTL);
  90         P0.l = LO(WDOGA_CTL);
  91 #else
  92         P0.h = HI(WDOG_CTL);
  93         P0.l = LO(WDOG_CTL);
  94 #endif
  95         R7 = W[P0](Z);
  96         CC = BITTST(R7,1);
  97         if !CC JUMP .LWRITE_TO_STAT;
  98         CC = BITTST(R7,2);
  99         if !CC JUMP .LWRITE_TO_STAT;
 100
 101 .LSKIP_WRITE_TO_STAT:
 102 #if defined(CONFIG_BF561)
 103         P0.h = HI(WDOGA_CTL);
 104         P0.l = LO(WDOGA_CTL);
 105 #else
 106         P0.h = HI(WDOG_CTL);
 107         P0.l = LO(WDOG_CTL);
 108 #endif
 109         R7 = W[P0](Z);
 110         BITCLR(R7,1);   /* Enable GP event */
 111         BITSET(R7,2);
 112         W[P0] = R7.L;
 113         SSYNC;
 114         NOP;
 115
 116         R7 = W[P0](Z);
 117         BITCLR(R7,4);   /* Enable the wdog counter */
 118         W[P0] = R7.L;
 119         SSYNC;
 120
 121         ( R7:0, P5:0 ) = [SP++];
 122         RTS;
 123
 124 ENTRY(_clear_wdog_wakeup_evt)
 125         [--SP] = ( R7:0, P5:0 );
 126
 127 #if defined(CONFIG_BF561)
 128         P0.h = HI(WDOGA_CTL);
 129         P0.l = LO(WDOGA_CTL);
 130 #else
 131         P0.h = HI(WDOG_CTL);
 132         P0.l = LO(WDOG_CTL);
 133 #endif
 134         R7 = 0x0AD6(Z);
 135         W[P0] = R7.L;
 136         SSYNC;
 137
 138         R7 = W[P0](Z);
 139         BITSET(R7,15);
 140         W[P0] = R7.L;
 141         SSYNC;
 142
 143         R7 = W[P0](Z);
 144         BITSET(R7,1);
 145         BITSET(R7,2);
 146         W[P0] = R7.L;
 147         SSYNC;
 148
 149         ( R7:0, P5:0 ) = [SP++];
 150         RTS;
 151
 152 ENTRY(_disable_wdog_timer)
 153         [--SP] = ( R7:0, P5:0 );
 154 #if defined(CONFIG_BF561)
 155         P0.h = HI(WDOGA_CTL);
 156         P0.l = LO(WDOGA_CTL);
 157 #else
 158         P0.h = HI(WDOG_CTL);
 159         P0.l = LO(WDOG_CTL);
 160 #endif
 161         R7 = 0xAD6(Z);
 162         W[P0] = R7.L;
 163         SSYNC;
 164         ( R7:0, P5:0 ) = [SP++];
 165         RTS;
 166
 167 #if !defined(CONFIG_BF561)
 168
 169 .section .l1.text
 170
 171 ENTRY(_sleep_mode)
 172         [--SP] = ( R7:0, P5:0 );
 173         [--SP] =  RETS;
 174
 175         call _set_sic_iwr;
 176
 177         R0 = 0xFFFF (Z);
 178         call _set_rtc_istat;
 179
 180         P0.H = hi(PLL_CTL);
 181         P0.L = lo(PLL_CTL);
 182         R1 = W[P0](z);
 183         BITSET (R1, 3);
 184         W[P0] = R1.L;
 185
 186         CLI R2;
 187         SSYNC;
 188         IDLE;
 189         STI R2;
 190
 191         call _test_pll_locked;
 192
 193         R0 = IWR_ENABLE(0);
 194         R1 = IWR_DISABLE_ALL;
 195         R2 = IWR_DISABLE_ALL;
 196
 197         call _set_sic_iwr;
 198
 199         P0.H = hi(PLL_CTL);
 200         P0.L = lo(PLL_CTL);
 201         R7 = w[p0](z);
 202         BITCLR (R7, 3);
 203         BITCLR (R7, 5);
 204         w[p0] = R7.L;
 205         IDLE;
 206         call _test_pll_locked;
 207
 208         RETS = [SP++];
 209         ( R7:0, P5:0 ) = [SP++];
 210         RTS;
 211
 212 ENTRY(_hibernate_mode)
 213         [--SP] = ( R7:0, P5:0 );
 214         [--SP] =  RETS;
 215
 216         call _set_sic_iwr;
 217
 218         R0 = 0xFFFF (Z);
 219         call _set_rtc_istat;
 220
 221         P0.H = hi(VR_CTL);
 222         P0.L = lo(VR_CTL);
 223         R1 = W[P0](z);
 224         BITSET (R1, 8);
 225         BITCLR (R1, 0);
 226         BITCLR (R1, 1);
 227         W[P0] = R1.L;
 228         SSYNC;
 229
 230         CLI R2;
 231         IDLE;
 232
 233         /* Actually, adding anything may not be necessary...SDRAM contents
 234          * are lost
 235          */
 236
 237 ENTRY(_deep_sleep)
 238         [--SP] = ( R7:0, P5:0 );
 239         [--SP] =  RETS;
 240
 241         CLI R4;
 242
 243         R0 = IWR_ENABLE(0);
 244         R1 = IWR_DISABLE_ALL;
 245         R2 = IWR_DISABLE_ALL;
 246
 247         call _set_sic_iwr;
 248
 249         call _set_dram_srfs;
 250
 251         /* Clear all the interrupts,bits sticky */
 252         R0 = 0xFFFF (Z);
 253         call _set_rtc_istat
 254
 255         P0.H = hi(PLL_CTL);
 256         P0.L = lo(PLL_CTL);
 257         R0 = W[P0](z);
 258         BITSET (R0, 5);
 259         W[P0] = R0.L;
 260
 261         call _test_pll_locked;
 262
 263         SSYNC;
 264         IDLE;
 265
 266         call _unset_dram_srfs;
 267
 268         call _test_pll_locked;
 269
 270         R0 = IWR_ENABLE(0);
 271         R1 = IWR_DISABLE_ALL;
 272         R2 = IWR_DISABLE_ALL;
 273
 274         call _set_sic_iwr;
 275
 276         P0.H = hi(PLL_CTL);
 277         P0.L = lo(PLL_CTL);
 278         R0 = w[p0](z);
 279         BITCLR (R0, 3);
 280         BITCLR (R0, 5);
 281         BITCLR (R0, 8);
 282         w[p0] = R0;
 283         IDLE;
 284         call _test_pll_locked;
 285
 286         STI R4;
 287
 288         RETS = [SP++];
 289         ( R7:0, P5:0 ) = [SP++];
 290         RTS;
 291
 292 ENTRY(_sleep_deeper)
 293         [--SP] = ( R7:0, P5:0 );
 294         [--SP] =  RETS;
 295
 296         CLI R4;
 297
 298         P3 = R0;
 299         P4 = R1;
 300         P5 = R2;
 301
 302         R0 = IWR_ENABLE(0);
 303         R1 = IWR_DISABLE_ALL;
 304         R2 = IWR_DISABLE_ALL;
 305
 306         call _set_sic_iwr;
 307         call _set_dram_srfs;    /* Set SDRAM Self Refresh */
 308
 309         /* Clear all the interrupts,bits sticky */
 310         R0 = 0xFFFF (Z);
 311         call _set_rtc_istat;
 312         P0.H = hi(PLL_DIV);
 313         P0.L = lo(PLL_DIV);
 314         R6 = W[P0](z);
 315         R0.L = 0xF;
 316         W[P0] = R0.l;           /* Set Max VCO to SCLK divider */
 317
 318         P0.H = hi(PLL_CTL);
 319         P0.L = lo(PLL_CTL);
 320         R5 = W[P0](z);
 321         R0.L = (CONFIG_MIN_VCO_HZ/CONFIG_CLKIN_HZ) << 9;
 322         W[P0] = R0.l;           /* Set Min CLKIN to VCO multiplier */
 323
 324         SSYNC;
 325         IDLE;
 326
 327         call _test_pll_locked;
 328
 329         P0.H = hi(VR_CTL);
 330         P0.L = lo(VR_CTL);
 331         R7 = W[P0](z);
 332         R1 = 0x6;
 333         R1 <<= 16;
 334         R2 = 0x0404(Z);
 335         R1 = R1|R2;
 336
 337         R2 = DEPOSIT(R7, R1);
 338         W[P0] = R2;             /* Set Min Core Voltage */
 339
 340         SSYNC;
 341         IDLE;
 342
 343         call _test_pll_locked;
 344
 345         R0 = P3;
 346         R1 = P4;
 347         R3 = P5;
 348         call _set_sic_iwr;      /* Set Awake from IDLE */
 349
 350         P0.H = hi(PLL_CTL);
 351         P0.L = lo(PLL_CTL);
 352         R0 = W[P0](z);
 353         BITSET (R0, 3);
 354         W[P0] = R0.L;           /* Turn CCLK OFF */
 355         SSYNC;
 356         IDLE;
 357
 358         call _test_pll_locked;
 359
 360         R0 = IWR_ENABLE(0);
 361         R1 = IWR_DISABLE_ALL;
 362         R2 = IWR_DISABLE_ALL;
 363
 364         call _set_sic_iwr;      /* Set Awake from IDLE PLL */
 365
 366         P0.H = hi(VR_CTL);
 367         P0.L = lo(VR_CTL);
 368         W[P0]= R7;
 369
 370         SSYNC;
 371         IDLE;
 372
 373         call _test_pll_locked;
 374
 375         P0.H = hi(PLL_DIV);
 376         P0.L = lo(PLL_DIV);
 377         W[P0]= R6;              /* Restore CCLK and SCLK divider */
 378
 379         P0.H = hi(PLL_CTL);
 380         P0.L = lo(PLL_CTL);
 381         w[p0] = R5;             /* Restore VCO multiplier */
 382         IDLE;
 383         call _test_pll_locked;
 384
 385         call _unset_dram_srfs;  /* SDRAM Self Refresh Off */
 386
 387         STI R4;
 388
 389         RETS = [SP++];
 390         ( R7:0, P5:0 ) = [SP++];
 391         RTS;
 392
 393 ENTRY(_set_dram_srfs)
 394         /*  set the dram to self refresh mode */
 395 #if defined(CONFIG_BF54x)
 396         P0.H = hi(EBIU_RSTCTL);
 397         P0.L = lo(EBIU_RSTCTL);
 398         R2 = [P0];
 399         R3.H = hi(SRREQ);
 400         R3.L = lo(SRREQ);
 401 #else
 402         P0.H = hi(EBIU_SDGCTL);
 403         P0.L = lo(EBIU_SDGCTL);
 404         R2 = [P0];
 405         R3.H = hi(SRFS);
 406         R3.L = lo(SRFS);
 407 #endif
 408         R2 = R2|R3;
 409         [P0] = R2;
 410         ssync;
 411 #if defined(CONFIG_BF54x)
 412 .LSRR_MODE:
 413         R2 = [P0];
 414         CC = BITTST(R2, 4);
 415         if !CC JUMP .LSRR_MODE;
 416 #endif
 417         RTS;
 418
 419 ENTRY(_unset_dram_srfs)
 420         /*  set the dram out of self refresh mode */
 421 #if defined(CONFIG_BF54x)
 422         P0.H = hi(EBIU_RSTCTL);
 423         P0.L = lo(EBIU_RSTCTL);
 424         R2 = [P0];
 425         R3.H = hi(SRREQ);
 426         R3.L = lo(SRREQ);
 427 #else
 428         P0.H = hi(EBIU_SDGCTL);
 429         P0.L = lo(EBIU_SDGCTL);
 430         R2 = [P0];
 431         R3.H = hi(SRFS);
 432         R3.L = lo(SRFS);
 433 #endif
 434         R3 = ~R3;
 435         R2 = R2&R3;
 436         [P0] = R2;
 437         ssync;
 438         RTS;
 439
 440 ENTRY(_set_sic_iwr)
 441 #if defined(CONFIG_BF54x) || defined(CONFIG_BF52x)  || defined(CONFIG_BF561)
 442         P0.H = hi(SIC_IWR0);
 443         P0.L = lo(SIC_IWR0);
 444         P1.H = hi(SIC_IWR1);
 445         P1.L = lo(SIC_IWR1);
 446         [P1] = R1;
 447 #if defined(CONFIG_BF54x)
 448         P1.H = hi(SIC_IWR2);
 449         P1.L = lo(SIC_IWR2);
 450         [P1] = R2;
 451 #endif
 452 #else
 453         P0.H = hi(SIC_IWR);
 454         P0.L = lo(SIC_IWR);
 455 #endif
 456         [P0] = R0;
 457
 458         SSYNC;
 459         RTS;
 460
 461 ENTRY(_set_rtc_istat)
 462         P0.H = hi(RTC_ISTAT);
 463         P0.L = lo(RTC_ISTAT);
 464         w[P0] = R0.L;
 465         SSYNC;
 466         RTS;
 467
 468 ENTRY(_test_pll_locked)
 469         P0.H = hi(PLL_STAT);
 470         P0.L = lo(PLL_STAT);
 471 1:
 472         R0 = W[P0] (Z);
 473         CC = BITTST(R0,5);
 474         IF !CC JUMP 1b;
 475         RTS;
 476 #endif