arch/m68k/mac/via.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *      6522 Versatile Interface Adapter (VIA)
   4  *
   5  *      There are two of these on the Mac II. Some IRQs are vectored
   6  *      via them as are assorted bits and bobs - eg RTC, ADB.
   7  *
   8  * CSA: Motorola seems to have removed documentation on the 6522 from
   9  * their web site; try
  10  *     http://nerini.drf.com/vectrex/other/text/chips/6522/
  11  *     http://www.zymurgy.net/classic/vic20/vicdet1.htm
  12  * and
  13  *     http://193.23.168.87/mikro_laborversuche/via_iobaustein/via6522_1.html
  14  * for info.  A full-text web search on 6522 AND VIA will probably also
  15  * net some usefulness. <cananian@alumni.princeton.edu> 20apr1999
  16  *
  17  * Additional data is here (the SY6522 was used in the Mac II etc):
  18  *     http://www.6502.org/documents/datasheets/synertek/synertek_sy6522.pdf
  19  *     http://www.6502.org/documents/datasheets/synertek/synertek_sy6522_programming_reference.pdf
  20  *
  21  * PRAM/RTC access algorithms are from the NetBSD RTC toolkit version 1.08b
  22  * by Erik Vogan and adapted to Linux by Joshua M. Thompson (funaho@jurai.org)
  23  *
  24  */
  25
  26 #include <linux/types.h>
  27 #include <linux/kernel.h>
  28 #include <linux/mm.h>
  29 #include <linux/delay.h>
  30 #include <linux/init.h>
  31 #include <linux/module.h>
  32 #include <linux/irq.h>
  33
  34 #include <asm/macintosh.h>
  35 #include <asm/macints.h>
  36 #include <asm/mac_via.h>
  37 #include <asm/mac_psc.h>
  38 #include <asm/mac_oss.h>
  39
  40 volatile __u8 *via1, *via2;
  41 int rbv_present;
  42 int via_alt_mapping;
  43 EXPORT_SYMBOL(via_alt_mapping);
  44 static __u8 rbv_clear;
  45
  46 /*
  47  * Globals for accessing the VIA chip registers without having to
  48  * check if we're hitting a real VIA or an RBV. Normally you could
  49  * just hit the combined register (ie, vIER|rIER) but that seems to
  50  * break on AV Macs...probably because they actually decode more than
  51  * eight address bits. Why can't Apple engineers at least be
  52  * _consistently_ lazy?                          - 1999-05-21 (jmt)
  53  */
  54
  55 static int gIER,gIFR,gBufA,gBufB;
  56
  57 /*
  58  * Timer defs.
  59  */
  60
  61 #define TICK_SIZE               10000
  62 #define MAC_CLOCK_TICK          (783300/HZ)             /* ticks per HZ */
  63 #define MAC_CLOCK_LOW           (MAC_CLOCK_TICK&0xFF)
  64 #define MAC_CLOCK_HIGH          (MAC_CLOCK_TICK>>8)
  65
  66
  67 /*
  68  * On Macs with a genuine VIA chip there is no way to mask an individual slot
  69  * interrupt. This limitation also seems to apply to VIA clone logic cores in
  70  * Quadra-like ASICs. (RBV and OSS machines don't have this limitation.)
  71  *
  72  * We used to fake it by configuring the relevant VIA pin as an output
  73  * (to mask the interrupt) or input (to unmask). That scheme did not work on
  74  * (at least) the Quadra 700. A NuBus card's /NMRQ signal is an open-collector
  75  * circuit (see Designing Cards and Drivers for Macintosh II and Macintosh SE,
  76  * p. 10-11 etc) but VIA outputs are not (see datasheet).
  77  *
  78  * Driving these outputs high must cause the VIA to source current and the
  79  * card to sink current when it asserts /NMRQ. Current will flow but the pin
  80  * voltage is uncertain and so the /NMRQ condition may still cause a transition
  81  * at the VIA2 CA1 input (which explains the lost interrupts). A side effect
  82  * is that a disabled slot IRQ can never be tested as pending or not.
  83  *
  84  * Driving these outputs low doesn't work either. All the slot /NMRQ lines are
  85  * (active low) OR'd together to generate the CA1 (aka "SLOTS") interrupt (see
  86  * The Guide To Macintosh Family Hardware, 2nd edition p. 167). If we drive a
  87  * disabled /NMRQ line low, the falling edge immediately triggers a CA1
  88  * interrupt and all slot interrupts after that will generate no transition
  89  * and therefore no interrupt, even after being re-enabled.
  90  *
  91  * So we make the VIA port A I/O lines inputs and use nubus_disabled to keep
  92  * track of their states. When any slot IRQ becomes disabled we mask the CA1
  93  * umbrella interrupt. Only when all slot IRQs become enabled do we unmask
  94  * the CA1 interrupt. It must remain enabled even when cards have no interrupt
  95  * handler registered. Drivers must therefore disable a slot interrupt at the
  96  * device before they call free_irq (like shared and autovector interrupts).
  97  *
  98  * There is also a related problem when MacOS is used to boot Linux. A network
  99  * card brought up by a MacOS driver may raise an interrupt while Linux boots.
 100  * This can be fatal since it can't be handled until the right driver loads
 101  * (if such a driver exists at all). Apparently related to this hardware
 102  * limitation, "Designing Cards and Drivers", p. 9-8, says that a slot
 103  * interrupt with no driver would crash MacOS (the book was written before
 104  * the appearance of Macs with RBV or OSS).
 105  */
 106
 107 static u8 nubus_disabled;
 108
 109 void via_debug_dump(void);
 110
 111 /*
 112  * Initialize the VIAs
 113  *
 114  * First we figure out where they actually _are_ as well as what type of
 115  * VIA we have for VIA2 (it could be a real VIA or an RBV or even an OSS.)
 116  * Then we pretty much clear them out and disable all IRQ sources.
 117  *
 118  * Note: the OSS is actually "detected" here and not in oss_init(). It just
 119  *       seems more logical to do it here since via_init() needs to know
 120  *       these things anyways.
 121  */
 122
 123 void __init via_init(void)
 124 {
 125         switch(macintosh_config->via_type) {
 126
 127                 /* IIci, IIsi, IIvx, IIvi (P6xx), LC series */
 128
 129                 case MAC_VIA_IICI:
 130                         via1 = (void *) VIA1_BASE;
 131                         if (macintosh_config->ident == MAC_MODEL_IIFX) {
 132                                 via2 = NULL;
 133                                 rbv_present = 0;
 134                                 oss_present = 1;
 135                         } else {
 136                                 via2 = (void *) RBV_BASE;
 137                                 rbv_present = 1;
 138                                 oss_present = 0;
 139                         }
 140                         if (macintosh_config->ident == MAC_MODEL_LCIII) {
 141                                 rbv_clear = 0x00;
 142                         } else {
 143                                 /* on most RBVs (& unlike the VIAs), you   */
 144                                 /* need to set bit 7 when you write to IFR */
 145                                 /* in order for your clear to occur.       */
 146                                 rbv_clear = 0x80;
 147                         }
 148                         gIER = rIER;
 149                         gIFR = rIFR;
 150                         gBufA = rSIFR;
 151                         gBufB = rBufB;
 152                         break;
 153
 154                 /* Quadra and early MacIIs agree on the VIA locations */
 155
 156                 case MAC_VIA_QUADRA:
 157                 case MAC_VIA_II:
 158                         via1 = (void *) VIA1_BASE;
 159                         via2 = (void *) VIA2_BASE;
 160                         rbv_present = 0;
 161                         oss_present = 0;
 162                         rbv_clear = 0x00;
 163                         gIER = vIER;
 164                         gIFR = vIFR;
 165                         gBufA = vBufA;
 166                         gBufB = vBufB;
 167                         break;
 168                 default:
 169                         panic("UNKNOWN VIA TYPE");
 170         }
 171
 172         printk(KERN_INFO "VIA1 at %p is a 6522 or clone\n", via1);
 173
 174         printk(KERN_INFO "VIA2 at %p is ", via2);
 175         if (rbv_present) {
 176                 printk("an RBV\n");
 177         } else if (oss_present) {
 178                 printk("an OSS\n");
 179         } else {
 180                 printk("a 6522 or clone\n");
 181         }
 182
 183 #ifdef DEBUG_VIA
 184         via_debug_dump();
 185 #endif
 186
 187         /*
 188          * Shut down all IRQ sources, reset the timers, and
 189          * kill the timer latch on VIA1.
 190          */
 191
 192         via1[vIER] = 0x7F;
 193         via1[vIFR] = 0x7F;
 194         via1[vT1LL] = 0;
 195         via1[vT1LH] = 0;
 196         via1[vT1CL] = 0;
 197         via1[vT1CH] = 0;
 198         via1[vT2CL] = 0;
 199         via1[vT2CH] = 0;
 200         via1[vACR] &= ~0xC0; /* setup T1 timer with no PB7 output */
 201         via1[vACR] &= ~0x03; /* disable port A & B latches */
 202
 203         /*
 204          * SE/30: disable video IRQ
 205          * XXX: testing for SE/30 VBL
 206          */
 207
 208         if (macintosh_config->ident == MAC_MODEL_SE30) {
 209                 via1[vDirB] |= 0x40;
 210                 via1[vBufB] |= 0x40;
 211         }
 212
 213         /*
 214          * Set the RTC bits to a known state: all lines to outputs and
 215          * RTC disabled (yes that's 0 to enable and 1 to disable).
 216          */
 217
 218         via1[vDirB] |= (VIA1B_vRTCEnb | VIA1B_vRTCClk | VIA1B_vRTCData);
 219         via1[vBufB] |= (VIA1B_vRTCEnb | VIA1B_vRTCClk);
 220
 221         /* Everything below this point is VIA2/RBV only... */
 222
 223         if (oss_present)
 224                 return;
 225
 226         if ((macintosh_config->via_type == MAC_VIA_QUADRA) &&
 227             (macintosh_config->adb_type != MAC_ADB_PB1) &&
 228             (macintosh_config->adb_type != MAC_ADB_PB2) &&
 229             (macintosh_config->ident    != MAC_MODEL_C660) &&
 230             (macintosh_config->ident    != MAC_MODEL_Q840)) {
 231                 via_alt_mapping = 1;
 232                 via1[vDirB] |= 0x40;
 233                 via1[vBufB] &= ~0x40;
 234         } else {
 235                 via_alt_mapping = 0;
 236         }
 237
 238         /*
 239          * Now initialize VIA2. For RBV we just kill all interrupts;
 240          * for a regular VIA we also reset the timers and stuff.
 241          */
 242
 243         via2[gIER] = 0x7F;
 244         via2[gIFR] = 0x7F | rbv_clear;
 245         if (!rbv_present) {
 246                 via2[vT1LL] = 0;
 247                 via2[vT1LH] = 0;
 248                 via2[vT1CL] = 0;
 249                 via2[vT1CH] = 0;
 250                 via2[vT2CL] = 0;
 251                 via2[vT2CH] = 0;
 252                 via2[vACR] &= ~0xC0; /* setup T1 timer with no PB7 output */
 253                 via2[vACR] &= ~0x03; /* disable port A & B latches */
 254         }
 255
 256         /* Everything below this point is VIA2 only... */
 257
 258         if (rbv_present)
 259                 return;
 260
 261         /*
 262          * Set vPCR for control line interrupts.
 263          *
 264          * CA1 (SLOTS IRQ), CB1 (ASC IRQ): negative edge trigger.
 265          *
 266          * Macs with ESP SCSI have a negative edge triggered SCSI interrupt.
 267          * Testing reveals that PowerBooks do too. However, the SE/30
 268          * schematic diagram shows an active high NCR5380 IRQ line.
 269          */
 270
 271         pr_debug("VIA2 vPCR is 0x%02X\n", via2[vPCR]);
 272         if (macintosh_config->via_type == MAC_VIA_II) {
 273                 /* CA2 (SCSI DRQ), CB2 (SCSI IRQ): indep. input, pos. edge */
 274                 via2[vPCR] = 0x66;
 275         } else {
 276                 /* CA2 (SCSI DRQ), CB2 (SCSI IRQ): indep. input, neg. edge */
 277                 via2[vPCR] = 0x22;
 278         }
 279 }
 280
 281 /*
 282  * Start the 100 Hz clock
 283  */
 284
 285 void __init via_init_clock(irq_handler_t func)
 286 {
 287         via1[vACR] |= 0x40;
 288         via1[vT1LL] = MAC_CLOCK_LOW;
 289         via1[vT1LH] = MAC_CLOCK_HIGH;
 290         via1[vT1CL] = MAC_CLOCK_LOW;
 291         via1[vT1CH] = MAC_CLOCK_HIGH;
 292
 293         if (request_irq(IRQ_MAC_TIMER_1, func, 0, "timer", func))
 294                 pr_err("Couldn't register %s interrupt\n", "timer");
 295 }
 296
 297 /*
 298  * Debugging dump, used in various places to see what's going on.
 299  */
 300
 301 void via_debug_dump(void)
 302 {
 303         printk(KERN_DEBUG "VIA1: DDRA = 0x%02X DDRB = 0x%02X ACR = 0x%02X\n",
 304                 (uint) via1[vDirA], (uint) via1[vDirB], (uint) via1[vACR]);
 305         printk(KERN_DEBUG "         PCR = 0x%02X  IFR = 0x%02X IER = 0x%02X\n",
 306                 (uint) via1[vPCR], (uint) via1[vIFR], (uint) via1[vIER]);
 307         if (oss_present) {
 308                 printk(KERN_DEBUG "VIA2: <OSS>\n");
 309         } else if (rbv_present) {
 310                 printk(KERN_DEBUG "VIA2:  IFR = 0x%02X  IER = 0x%02X\n",
 311                         (uint) via2[rIFR], (uint) via2[rIER]);
 312                 printk(KERN_DEBUG "      SIFR = 0x%02X SIER = 0x%02X\n",
 313                         (uint) via2[rSIFR], (uint) via2[rSIER]);
 314         } else {
 315                 printk(KERN_DEBUG "VIA2: DDRA = 0x%02X DDRB = 0x%02X ACR = 0x%02X\n",
 316                         (uint) via2[vDirA], (uint) via2[vDirB],
 317                         (uint) via2[vACR]);
 318                 printk(KERN_DEBUG "         PCR = 0x%02X  IFR = 0x%02X IER = 0x%02X\n",
 319                         (uint) via2[vPCR],
 320                         (uint) via2[vIFR], (uint) via2[vIER]);
 321         }
 322 }
 323
 324 /*
 325  * This is always executed with interrupts disabled.
 326  *
 327  * TBI: get time offset between scheduling timer ticks
 328  */
 329
 330 u32 mac_gettimeoffset(void)
 331 {
 332         unsigned long ticks, offset = 0;
 333
 334         /* read VIA1 timer 2 current value */
 335         ticks = via1[vT1CL] | (via1[vT1CH] << 8);
 336         /* The probability of underflow is less than 2% */
 337         if (ticks > MAC_CLOCK_TICK - MAC_CLOCK_TICK / 50)
 338                 /* Check for pending timer interrupt in VIA1 IFR */
 339                 if (via1[vIFR] & 0x40) offset = TICK_SIZE;
 340
 341         ticks = MAC_CLOCK_TICK - ticks;
 342         ticks = ticks * 10000L / MAC_CLOCK_TICK;
 343
 344         return (ticks + offset) * 1000;
 345 }
 346
 347 /*
 348  * Flush the L2 cache on Macs that have it by flipping
 349  * the system into 24-bit mode for an instant.
 350  */
 351
 352 void via_flush_cache(void)
 353 {
 354         via2[gBufB] &= ~VIA2B_vMode32;
 355         via2[gBufB] |= VIA2B_vMode32;
 356 }
 357
 358 /*
 359  * Return the status of the L2 cache on a IIci
 360  */
 361
 362 int via_get_cache_disable(void)
 363 {
 364         /* Safeguard against being called accidentally */
 365         if (!via2) {
 366                 printk(KERN_ERR "via_get_cache_disable called on a non-VIA machine!\n");
 367                 return 1;
 368         }
 369
 370         return (int) via2[gBufB] & VIA2B_vCDis;
 371 }
 372
 373 /*
 374  * Initialize VIA2 for Nubus access
 375  */
 376
 377 void __init via_nubus_init(void)
 378 {
 379         /* unlock nubus transactions */
 380
 381         if ((macintosh_config->adb_type != MAC_ADB_PB1) &&
 382             (macintosh_config->adb_type != MAC_ADB_PB2)) {
 383                 /* set the line to be an output on non-RBV machines */
 384                 if (!rbv_present)
 385                         via2[vDirB] |= 0x02;
 386
 387                 /* this seems to be an ADB bit on PMU machines */
 388                 /* according to MkLinux.  -- jmt               */
 389                 via2[gBufB] |= 0x02;
 390         }
 391
 392         /*
 393          * Disable the slot interrupts. On some hardware that's not possible.
 394          * On some hardware it's unclear what all of these I/O lines do.
 395          */
 396
 397         switch (macintosh_config->via_type) {
 398         case MAC_VIA_II:
 399         case MAC_VIA_QUADRA:
 400                 pr_debug("VIA2 vDirA is 0x%02X\n", via2[vDirA]);
 401                 break;
 402         case MAC_VIA_IICI:
 403                 /* RBV. Disable all the slot interrupts. SIER works like IER. */
 404                 via2[rSIER] = 0x7F;
 405                 break;
 406         }
 407 }
 408
 409 void via_nubus_irq_startup(int irq)
 410 {
 411         int irq_idx = IRQ_IDX(irq);
 412
 413         switch (macintosh_config->via_type) {
 414         case MAC_VIA_II:
 415         case MAC_VIA_QUADRA:
 416                 /* Make the port A line an input. Probably redundant. */
 417                 if (macintosh_config->via_type == MAC_VIA_II) {
 418                         /* The top two bits are RAM size outputs. */
 419                         via2[vDirA] &= 0xC0 | ~(1 << irq_idx);
 420                 } else {
 421                         /* Allow NuBus slots 9 through F. */
 422                         via2[vDirA] &= 0x80 | ~(1 << irq_idx);
 423                 }
 424                 /* fall through */
 425         case MAC_VIA_IICI:
 426                 via_irq_enable(irq);
 427                 break;
 428         }
 429 }
 430
 431 void via_nubus_irq_shutdown(int irq)
 432 {
 433         switch (macintosh_config->via_type) {
 434         case MAC_VIA_II:
 435         case MAC_VIA_QUADRA:
 436                 /* Ensure that the umbrella CA1 interrupt remains enabled. */
 437                 via_irq_enable(irq);
 438                 break;
 439         case MAC_VIA_IICI:
 440                 via_irq_disable(irq);
 441                 break;
 442         }
 443 }
 444
 445 /*
 446  * The generic VIA interrupt routines (shamelessly stolen from Alan Cox's
 447  * via6522.c :-), disable/pending masks added.
 448  */
 449
 450 void via1_irq(struct irq_desc *desc)
 451 {
 452         int irq_num;
 453         unsigned char irq_bit, events;
 454
 455         events = via1[vIFR] & via1[vIER] & 0x7F;
 456         if (!events)
 457                 return;
 458
 459         irq_num = VIA1_SOURCE_BASE;
 460         irq_bit = 1;
 461         do {
 462                 if (events & irq_bit) {
 463                         via1[vIFR] = irq_bit;
 464                         generic_handle_irq(irq_num);
 465                 }
 466                 ++irq_num;
 467                 irq_bit <<= 1;
 468         } while (events >= irq_bit);
 469 }
 470
 471 static void via2_irq(struct irq_desc *desc)
 472 {
 473         int irq_num;
 474         unsigned char irq_bit, events;
 475
 476         events = via2[gIFR] & via2[gIER] & 0x7F;
 477         if (!events)
 478                 return;
 479
 480         irq_num = VIA2_SOURCE_BASE;
 481         irq_bit = 1;
 482         do {
 483                 if (events & irq_bit) {
 484                         via2[gIFR] = irq_bit | rbv_clear;
 485                         generic_handle_irq(irq_num);
 486                 }
 487                 ++irq_num;
 488                 irq_bit <<= 1;
 489         } while (events >= irq_bit);
 490 }
 491
 492 /*
 493  * Dispatch Nubus interrupts. We are called as a secondary dispatch by the
 494  * VIA2 dispatcher as a fast interrupt handler.
 495  */
 496
 497 static void via_nubus_irq(struct irq_desc *desc)
 498 {
 499         int slot_irq;
 500         unsigned char slot_bit, events;
 501
 502         events = ~via2[gBufA] & 0x7F;
 503         if (rbv_present)
 504                 events &= via2[rSIER];
 505         else
 506                 events &= ~via2[vDirA];
 507         if (!events)
 508                 return;
 509
 510         do {
 511                 slot_irq = IRQ_NUBUS_F;
 512                 slot_bit = 0x40;
 513                 do {
 514                         if (events & slot_bit) {
 515                                 events &= ~slot_bit;
 516                                 generic_handle_irq(slot_irq);
 517                         }
 518                         --slot_irq;
 519                         slot_bit >>= 1;
 520                 } while (events);
 521
 522                 /* clear the CA1 interrupt and make certain there's no more. */
 523                 via2[gIFR] = 0x02 | rbv_clear;
 524                 events = ~via2[gBufA] & 0x7F;
 525                 if (rbv_present)
 526                         events &= via2[rSIER];
 527                 else
 528                         events &= ~via2[vDirA];
 529         } while (events);
 530 }
 531
 532 /*
 533  * Register the interrupt dispatchers for VIA or RBV machines only.
 534  */
 535
 536 void __init via_register_interrupts(void)
 537 {
 538         if (via_alt_mapping) {
 539                 /* software interrupt */
 540                 irq_set_chained_handler(IRQ_AUTO_1, via1_irq);
 541                 /* via1 interrupt */
 542                 irq_set_chained_handler(IRQ_AUTO_6, via1_irq);
 543         } else {
 544                 irq_set_chained_handler(IRQ_AUTO_1, via1_irq);
 545         }
 546         irq_set_chained_handler(IRQ_AUTO_2, via2_irq);
 547         irq_set_chained_handler(IRQ_MAC_NUBUS, via_nubus_irq);
 548 }
 549
 550 void via_irq_enable(int irq) {
 551         int irq_src     = IRQ_SRC(irq);
 552         int irq_idx     = IRQ_IDX(irq);
 553
 554         if (irq_src == 1) {
 555                 via1[vIER] = IER_SET_BIT(irq_idx);
 556         } else if (irq_src == 2) {
 557                 if (irq != IRQ_MAC_NUBUS || nubus_disabled == 0)
 558                         via2[gIER] = IER_SET_BIT(irq_idx);
 559         } else if (irq_src == 7) {
 560                 switch (macintosh_config->via_type) {
 561                 case MAC_VIA_II:
 562                 case MAC_VIA_QUADRA:
 563                         nubus_disabled &= ~(1 << irq_idx);
 564                         /* Enable the CA1 interrupt when no slot is disabled. */
 565                         if (!nubus_disabled)
 566                                 via2[gIER] = IER_SET_BIT(1);
 567                         break;
 568                 case MAC_VIA_IICI:
 569                         /* On RBV, enable the slot interrupt.
 570                          * SIER works like IER.
 571                          */
 572                         via2[rSIER] = IER_SET_BIT(irq_idx);
 573                         break;
 574                 }
 575         }
 576 }
 577
 578 void via_irq_disable(int irq) {
 579         int irq_src     = IRQ_SRC(irq);
 580         int irq_idx     = IRQ_IDX(irq);
 581
 582         if (irq_src == 1) {
 583                 via1[vIER] = IER_CLR_BIT(irq_idx);
 584         } else if (irq_src == 2) {
 585                 via2[gIER] = IER_CLR_BIT(irq_idx);
 586         } else if (irq_src == 7) {
 587                 switch (macintosh_config->via_type) {
 588                 case MAC_VIA_II:
 589                 case MAC_VIA_QUADRA:
 590                         nubus_disabled |= 1 << irq_idx;
 591                         if (nubus_disabled)
 592                                 via2[gIER] = IER_CLR_BIT(1);
 593                         break;
 594                 case MAC_VIA_IICI:
 595                         via2[rSIER] = IER_CLR_BIT(irq_idx);
 596                         break;
 597                 }
 598         }
 599 }
 600
 601 void via1_set_head(int head)
 602 {
 603         if (head == 0)
 604                 via1[vBufA] &= ~VIA1A_vHeadSel;
 605         else
 606                 via1[vBufA] |= VIA1A_vHeadSel;
 607 }
 608 EXPORT_SYMBOL(via1_set_head);
 609
 610 int via2_scsi_drq_pending(void)
 611 {
 612         return via2[gIFR] & (1 << IRQ_IDX(IRQ_MAC_SCSIDRQ));
 613 }
 614 EXPORT_SYMBOL(via2_scsi_drq_pending);