sys/arch/amiga/dev/bzivsc.c

   1 /*      $NetBSD: bzivsc.c,v 1.27 2009/10/21 23:53:38 snj Exp $ */
   2
   3 /*
   4  * Copyright (c) 1997 Michael L. Hitch
   5  * Copyright (c) 1982, 1990 The Regents of the University of California.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  */
  33
  34 #include <sys/cdefs.h>
  35 __KERNEL_RCSID(0, "$NetBSD: bzivsc.c,v 1.27 2009/10/21 23:53:38 snj Exp $");
  36
  37 #include <sys/types.h>
  38 #include <sys/param.h>
  39 #include <sys/systm.h>
  40 #include <sys/kernel.h>
  41 #include <sys/errno.h>
  42 #include <sys/ioctl.h>
  43 #include <sys/device.h>
  44 #include <sys/buf.h>
  45 #include <sys/proc.h>
  46 #include <sys/queue.h>
  47
  48 #include <uvm/uvm_extern.h>
  49
  50 #include <dev/scsipi/scsi_all.h>
  51 #include <dev/scsipi/scsipi_all.h>
  52 #include <dev/scsipi/scsiconf.h>
  53 #include <dev/scsipi/scsi_message.h>
  54
  55 #include <machine/cpu.h>
  56 #include <machine/param.h>
  57
  58 #include <dev/ic/ncr53c9xreg.h>
  59 #include <dev/ic/ncr53c9xvar.h>
  60
  61 #include <amiga/amiga/isr.h>
  62 #include <amiga/dev/bzivscvar.h>
  63 #include <amiga/dev/zbusvar.h>
  64
  65 #ifdef __powerpc__
  66 #define badaddr(a)      badaddr_read(a, 2, NULL)
  67 #endif
  68
  69 int     bzivscmatch(device_t, cfdata_t, void *);
  70 void    bzivscattach(device_t, device_t, void *);
  71
  72 /* Linkup to the rest of the kernel */
  73 CFATTACH_DECL_NEW(bzivsc, sizeof(struct bzivsc_softc),
  74     bzivscmatch, bzivscattach, NULL, NULL);
  75
  76 /*
  77  * Functions and the switch for the MI code.
  78  */
  79 uint8_t bzivsc_read_reg(struct ncr53c9x_softc *, int);
  80 void    bzivsc_write_reg(struct ncr53c9x_softc *, int, uint8_t);
  81 int     bzivsc_dma_isintr(struct ncr53c9x_softc *);
  82 void    bzivsc_dma_reset(struct ncr53c9x_softc *);
  83 int     bzivsc_dma_intr(struct ncr53c9x_softc *);
  84 int     bzivsc_dma_setup(struct ncr53c9x_softc *, uint8_t **,
  85             size_t *, int, size_t *);
  86 void    bzivsc_dma_go(struct ncr53c9x_softc *);
  87 void    bzivsc_dma_stop(struct ncr53c9x_softc *);
  88 int     bzivsc_dma_isactive(struct ncr53c9x_softc *);
  89
  90 struct ncr53c9x_glue bzivsc_glue = {
  91         bzivsc_read_reg,
  92         bzivsc_write_reg,
  93         bzivsc_dma_isintr,
  94         bzivsc_dma_reset,
  95         bzivsc_dma_intr,
  96         bzivsc_dma_setup,
  97         bzivsc_dma_go,
  98         bzivsc_dma_stop,
  99         bzivsc_dma_isactive,
 100         NULL,
 101 };
 102
 103 /* Maximum DMA transfer length to reduce impact on high-speed serial input */
 104 u_long bzivsc_max_dma = 1024;
 105 extern int ser_open_speed;
 106
 107 u_long bzivsc_cnt_pio = 0;      /* number of PIO transfers */
 108 u_long bzivsc_cnt_dma = 0;      /* number of DMA transfers */
 109 u_long bzivsc_cnt_dma2 = 0;     /* number of DMA transfers broken up */
 110 u_long bzivsc_cnt_dma3 = 0;     /* number of pages combined */
 111
 112 #ifdef DEBUG
 113 struct {
 114         uint8_t hardbits;
 115         uint8_t status;
 116         uint8_t xx;
 117         uint8_t yy;
 118 } bzivsc_trace[128];
 119 int bzivsc_trace_ptr = 0;
 120 int bzivsc_trace_enable = 1;
 121 void bzivsc_dump(void);
 122 #endif
 123
 124 /*
 125  * if we are a Phase5 Blizzard 12x0-IV
 126  */
 127 int
 128 bzivscmatch(device_t parent, cfdata_t cf, void *aux)
 129 {
 130         struct zbus_args *zap;
 131         volatile uint8_t *regs;
 132
 133         zap = aux;
 134         if (zap->manid != 0x2140)
 135                 return 0;                       /* It's not Phase 5 */
 136         if (zap->prodid != 11 && zap->prodid != 17)
 137                 return 0;                       /* Not Blizzard 12x0 */
 138         if (!is_a1200())
 139                 return 0;                       /* And not A1200 */
 140         regs = &((volatile u_char *)zap->va)[0x8000];
 141         if (badaddr((void *)__UNVOLATILE(regs)))
 142                 return 0;
 143         regs[NCR_CFG1 * 4] = 0;
 144         regs[NCR_CFG1 * 4] = NCRCFG1_PARENB | 7;
 145         delay(5);
 146         if (regs[NCR_CFG1 * 4] != (NCRCFG1_PARENB | 7))
 147                 return 0;
 148         return 1;
 149 }
 150
 151 /*
 152  * Attach this instance, and then all the sub-devices
 153  */
 154 void
 155 bzivscattach(device_t parent, device_t self, void *aux)
 156 {
 157         struct bzivsc_softc *bsc = device_private(self);
 158         struct ncr53c9x_softc *sc = &bsc->sc_ncr53c9x;
 159         struct zbus_args  *zap;
 160         extern u_long scsi_nosync;
 161         extern int shift_nosync;
 162         extern int ncr53c9x_debug;
 163
 164         /*
 165          * Set up the glue for MI code early; we use some of it here.
 166          */
 167         sc->sc_dev = self;
 168         sc->sc_glue = &bzivsc_glue;
 169
 170         /*
 171          * Save the regs
 172          */
 173         zap = aux;
 174         bsc->sc_reg = &((volatile uint8_t *)zap->va)[0x8000];
 175         bsc->sc_dmabase = &bsc->sc_reg[0x8000];
 176
 177         sc->sc_freq = 40;               /* Clocked at 40 MHz */
 178
 179         aprint_normal(": address %p", bsc->sc_reg);
 180
 181         sc->sc_id = 7;
 182
 183         /*
 184          * It is necessary to try to load the 2nd config register here,
 185          * to find out what rev the FAS chip is, else the ncr53c9x_reset
 186          * will not set up the defaults correctly.
 187          */
 188         sc->sc_cfg1 = sc->sc_id | NCRCFG1_PARENB;
 189         sc->sc_cfg2 = NCRCFG2_SCSI2 | NCRCFG2_FE;
 190         sc->sc_cfg3 = 0x08 /*FCLK*/ | NCRESPCFG3_FSCSI | NCRESPCFG3_CDB;
 191         sc->sc_rev = NCR_VARIANT_FAS216;
 192
 193         /*
 194          * This is the value used to start sync negotiations
 195          * Note that the NCR register "SYNCTP" is programmed
 196          * in "clocks per byte", and has a minimum value of 4.
 197          * The SCSI period used in negotiation is one-fourth
 198          * of the time (in nanoseconds) needed to transfer one byte.
 199          * Since the chip's clock is given in MHz, we have the following
 200          * formula: 4 * period = (1000 / freq) * 4
 201          */
 202         sc->sc_minsync = 1000 / sc->sc_freq;
 203
 204         /*
 205          * get flags from -I argument and set cf_flags.
 206          * NOTE: low 8 bits are to disable disconnect, and the next
 207          *       8 bits are to disable sync.
 208          */
 209         device_cfdata(self)->cf_flags |= (scsi_nosync >> shift_nosync)
 210             & 0xffff;
 211         shift_nosync += 16;
 212
 213         /* Use next 16 bits of -I argument to set ncr53c9x_debug flags */
 214         ncr53c9x_debug |= (scsi_nosync >> shift_nosync) & 0xffff;
 215         shift_nosync += 16;
 216
 217 #if 1
 218         if (((scsi_nosync >> shift_nosync) & 0xff00) == 0xff00)
 219                 sc->sc_minsync = 0;
 220 #endif
 221
 222         /* Really no limit, but since we want to fit into the TCR... */
 223         sc->sc_maxxfer = 64 * 1024;
 224
 225         /*
 226          * Configure interrupts.
 227          */
 228         bsc->sc_isr.isr_intr = ncr53c9x_intr;
 229         bsc->sc_isr.isr_arg  = sc;
 230         bsc->sc_isr.isr_ipl  = 2;
 231         add_isr(&bsc->sc_isr);
 232
 233         /*
 234          * Now try to attach all the sub-devices
 235          */
 236         sc->sc_adapter.adapt_request = ncr53c9x_scsipi_request;
 237         sc->sc_adapter.adapt_minphys = minphys;
 238         ncr53c9x_attach(sc);
 239 }
 240
 241 /*
 242  * Glue functions.
 243  */
 244
 245 uint8_t
 246 bzivsc_read_reg(struct ncr53c9x_softc *sc, int reg)
 247 {
 248         struct bzivsc_softc *bsc = (struct bzivsc_softc *)sc;
 249
 250         return bsc->sc_reg[reg * 4];
 251 }
 252
 253 void
 254 bzivsc_write_reg(struct ncr53c9x_softc *sc, int reg, uint8_t val)
 255 {
 256         struct bzivsc_softc *bsc = (struct bzivsc_softc *)sc;
 257         uint8_t v = val;
 258
 259         bsc->sc_reg[reg * 4] = v;
 260 #ifdef DEBUG
 261 if (bzivsc_trace_enable/* && sc->sc_nexus && sc->sc_nexus->xs->xs_control & XS_CTL_POLL */ &&
 262   reg == NCR_CMD/* && bsc->sc_active*/) {
 263   bzivsc_trace[(bzivsc_trace_ptr - 1) & 127].yy = v;
 264 /*  printf(" cmd %x", v);*/
 265 }
 266 #endif
 267 }
 268
 269 int
 270 bzivsc_dma_isintr(struct ncr53c9x_softc *sc)
 271 {
 272         struct bzivsc_softc *bsc = (struct bzivsc_softc *)sc;
 273
 274         if ((bsc->sc_reg[NCR_STAT * 4] & NCRSTAT_INT) == 0)
 275                 return 0;
 276
 277 #ifdef DEBUG
 278 if (/*sc->sc_nexus && sc->sc_nexus->xs->xs_control & XS_CTL_POLL &&*/ bzivsc_trace_enable) {
 279   bzivsc_trace[bzivsc_trace_ptr].status = bsc->sc_reg[NCR_STAT * 4];
 280   bzivsc_trace[bzivsc_trace_ptr].xx = bsc->sc_reg[NCR_CMD * 4];
 281   bzivsc_trace[bzivsc_trace_ptr].yy = bsc->sc_active;
 282   bzivsc_trace_ptr = (bzivsc_trace_ptr + 1) & 127;
 283 }
 284 #endif
 285         return 1;
 286 }
 287
 288 void
 289 bzivsc_dma_reset(struct ncr53c9x_softc *sc)
 290 {
 291         struct bzivsc_softc *bsc = (struct bzivsc_softc *)sc;
 292
 293         bsc->sc_active = 0;
 294 }
 295
 296 int
 297 bzivsc_dma_intr(struct ncr53c9x_softc *sc)
 298 {
 299         register struct bzivsc_softc *bsc = (struct bzivsc_softc *)sc;
 300         register int    cnt;
 301
 302         NCR_DMA(("bzivsc_dma_intr: cnt %d int %x stat %x fifo %d ",
 303             bsc->sc_dmasize, sc->sc_espintr, sc->sc_espstat,
 304             bsc->sc_reg[NCR_FFLAG * 4] & NCRFIFO_FF));
 305         if (bsc->sc_active == 0) {
 306                 printf("bzivsc_intr--inactive DMA\n");
 307                 return -1;
 308         }
 309
 310         /* update sc_dmaaddr and sc_pdmalen */
 311         cnt = bsc->sc_reg[NCR_TCL * 4];
 312         cnt += bsc->sc_reg[NCR_TCM * 4] << 8;
 313         cnt += bsc->sc_reg[NCR_TCH * 4] << 16;
 314         if (!bsc->sc_datain) {
 315                 cnt += bsc->sc_reg[NCR_FFLAG * 4] & NCRFIFO_FF;
 316                 bsc->sc_reg[NCR_CMD * 4] = NCRCMD_FLUSH;
 317         }
 318         cnt = bsc->sc_dmasize - cnt;    /* number of bytes transferred */
 319         NCR_DMA(("DMA xferred %d\n", cnt));
 320         if (bsc->sc_xfr_align) {
 321                 memcpy(*bsc->sc_dmaaddr, bsc->sc_alignbuf, cnt);
 322                 bsc->sc_xfr_align = 0;
 323         }
 324         *bsc->sc_dmaaddr += cnt;
 325         *bsc->sc_pdmalen -= cnt;
 326         bsc->sc_active = 0;
 327         return 0;
 328 }
 329
 330 int
 331 bzivsc_dma_setup(struct ncr53c9x_softc *sc, uint8_t **addr, size_t *len,
 332                  int datain, size_t *dmasize)
 333 {
 334         struct bzivsc_softc *bsc = (struct bzivsc_softc *)sc;
 335         paddr_t pa;
 336         uint8_t *ptr;
 337         size_t xfer;
 338
 339         bsc->sc_dmaaddr = addr;
 340         bsc->sc_pdmalen = len;
 341         bsc->sc_datain = datain;
 342         bsc->sc_dmasize = *dmasize;
 343         /*
 344          * DMA can be nasty for high-speed serial input, so limit the
 345          * size of this DMA operation if the serial port is running at
 346          * a high speed (higher than 19200 for now - should be adjusted
 347          * based on CPU type and speed?).
 348          * XXX - add serial speed check XXX
 349          */
 350         if (ser_open_speed > 19200 && bzivsc_max_dma != 0 &&
 351             bsc->sc_dmasize > bzivsc_max_dma)
 352                 bsc->sc_dmasize = bzivsc_max_dma;
 353         ptr = *addr;                    /* Kernel virtual address */
 354         pa = kvtop(ptr);                /* Physical address of DMA */
 355         xfer = min(bsc->sc_dmasize, PAGE_SIZE - (pa & (PAGE_SIZE - 1)));
 356         bsc->sc_xfr_align = 0;
 357         /*
 358          * If output and unaligned, stuff odd byte into FIFO
 359          */
 360         if (datain == 0 && (int)ptr & 1) {
 361                 NCR_DMA(("bzivsc_dma_setup: align byte written to fifo\n"));
 362                 pa++;
 363                 xfer--;                 /* XXXX CHECK THIS !!!! XXXX */
 364                 bsc->sc_reg[NCR_FIFO * 4] = *ptr++;
 365         }
 366         /*
 367          * If unaligned address, read unaligned bytes into alignment buffer
 368          */
 369         else if ((int)ptr & 1) {
 370                 pa = kvtop((void *)&bsc->sc_alignbuf);
 371                 xfer = bsc->sc_dmasize = min(xfer, sizeof(bsc->sc_alignbuf));
 372                 NCR_DMA(("bzivsc_dma_setup: align read by %d bytes\n", xfer));
 373                 bsc->sc_xfr_align = 1;
 374         }
 375 ++bzivsc_cnt_dma;               /* number of DMA operations */
 376
 377         while (xfer < bsc->sc_dmasize) {
 378                 if ((pa + xfer) != kvtop(*addr + xfer))
 379                         break;
 380                 if ((bsc->sc_dmasize - xfer) < PAGE_SIZE)
 381                         xfer = bsc->sc_dmasize;
 382                 else
 383                         xfer += PAGE_SIZE;
 384 ++bzivsc_cnt_dma3;
 385         }
 386 if (xfer != *len)
 387   ++bzivsc_cnt_dma2;
 388
 389         bsc->sc_dmasize = xfer;
 390         *dmasize = bsc->sc_dmasize;
 391         bsc->sc_pa = pa;
 392 #if defined(M68040) || defined(M68060)
 393         if (mmutype == MMU_68040) {
 394                 if (bsc->sc_xfr_align) {
 395                         dma_cachectl(bsc->sc_alignbuf,
 396                             sizeof(bsc->sc_alignbuf));
 397                 }
 398                 else
 399                         dma_cachectl(*bsc->sc_dmaaddr, bsc->sc_dmasize);
 400         }
 401 #endif
 402
 403         pa >>= 1;
 404         if (!bsc->sc_datain)
 405                 pa |= 0x80000000;
 406         bsc->sc_dmabase[0x8000] = (uint8_t)(pa >> 24);
 407         bsc->sc_dmabase[0] = (uint8_t)(pa >> 24);
 408         bsc->sc_dmabase[0] = (uint8_t)(pa >> 16);
 409         bsc->sc_dmabase[0] = (uint8_t)(pa >> 8);
 410         bsc->sc_dmabase[0] = (uint8_t)(pa);
 411         bsc->sc_active = 1;
 412         return 0;
 413 }
 414
 415 void
 416 bzivsc_dma_go(struct ncr53c9x_softc *sc)
 417 {
 418 }
 419
 420 void
 421 bzivsc_dma_stop(struct ncr53c9x_softc *sc)
 422 {
 423 }
 424
 425 int
 426 bzivsc_dma_isactive(struct ncr53c9x_softc *sc)
 427 {
 428         struct bzivsc_softc *bsc = (struct bzivsc_softc *)sc;
 429
 430         return bsc->sc_active;
 431 }
 432
 433 #ifdef DEBUG
 434 void
 435 bzivsc_dump(void)
 436 {
 437         int i;
 438
 439         i = bzivsc_trace_ptr;
 440         printf("bzivsc_trace dump: ptr %x\n", bzivsc_trace_ptr);
 441         do {
 442                 if (bzivsc_trace[i].hardbits == 0) {
 443                         i = (i + 1) & 127;
 444                         continue;
 445                 }
 446                 printf("%02x%02x%02x%02x(", bzivsc_trace[i].hardbits,
 447                     bzivsc_trace[i].status, bzivsc_trace[i].xx, bzivsc_trace[i].yy);
 448                 if (bzivsc_trace[i].status & NCRSTAT_INT)
 449                         printf("NCRINT/");
 450                 if (bzivsc_trace[i].status & NCRSTAT_TC)
 451                         printf("NCRTC/");
 452                 switch(bzivsc_trace[i].status & NCRSTAT_PHASE) {
 453                 case 0:
 454                         printf("dataout"); break;
 455                 case 1:
 456                         printf("datain"); break;
 457                 case 2:
 458                         printf("cmdout"); break;
 459                 case 3:
 460                         printf("status"); break;
 461                 case 6:
 462                         printf("msgout"); break;
 463                 case 7:
 464                         printf("msgin"); break;
 465                 default:
 466                         printf("phase%d?", bzivsc_trace[i].status & NCRSTAT_PHASE);
 467                 }
 468                 printf(") ");
 469                 i = (i + 1) & 127;
 470         } while (i != bzivsc_trace_ptr);
 471         printf("\n");
 472 }
 473 #endif