1 /* $NetBSD: cz.c,v 1.38 2006/07/21 16:48:51 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 Zembu Labs, Inc. 5 * All rights reserved. 6 * 7 * Authors: Jason R. Thorpe <thorpej@zembu.com> 8 * Bill Studenmund <wrstuden@zembu.com> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Zembu Labs, Inc. 21 * 4. Neither the name of Zembu Labs nor the names of its employees may 22 * be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY ZEMBU LABS, INC. ``AS IS'' AND ANY EXPRESS 26 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAR- 27 * RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DIS- 28 * CLAIMED. IN NO EVENT SHALL ZEMBU LABS BE LIABLE FOR ANY DIRECT, INDIRECT, 29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 /* 38 * Cyclades-Z series multi-port serial adapter driver for NetBSD. 39 * 40 * Some notes: 41 * 42 * - The Cyclades-Z has fully automatic hardware (and software!) 43 * flow control. We only use RTS/CTS flow control here, 44 * and it is implemented in a very simplistic manner. This 45 * may be an area of future work. 46 * 47 * - The PLX can map the either the board's RAM or host RAM 48 * into the MIPS's memory window. This would enable us to 49 * use less expensive (for us) memory reads/writes to host 50 * RAM, rather than time-consuming reads/writes to PCI 51 * memory space. However, the PLX can only map a 0-128M 52 * window, so we would have to ensure that the DMA address 53 * of the host RAM fits there. This is kind of a pain, 54 * so we just don't bother right now. 55 * 56 * - In a perfect world, we would use the autoconfiguration 57 * mechanism to attach the TTYs that we find. However, 58 * that leads to somewhat icky looking autoconfiguration 59 * messages (one for every TTY, up to 64 per board!). So 60 * we don't do it that way, but assign minors as if there 61 * were the max of 64 ports per board. 62 * 63 * - We don't bother with PPS support here. There are so many 64 * ports, each with a large amount of buffer space, that the 65 * normal mode of operation is to poll the boards regularly 66 * (generally, every 20ms or so). This makes this driver 67 * unsuitable for PPS, as the latency will be generally too 68 * high. 69 */ 70 /* 71 * This driver inspired by the FreeBSD driver written by Brian J. McGovern 72 * for FreeBSD 3.2. 73 */ 74 75 #include <sys/cdefs.h> 76 __KERNEL_RCSID(0, "$NetBSD: cz.c,v 1.38 2006/07/21 16:48:51 ad Exp $"); 77 78 #include <sys/param.h> 79 #include <sys/systm.h> 80 #include <sys/proc.h> 81 #include <sys/device.h> 82 #include <sys/malloc.h> 83 #include <sys/tty.h> 84 #include <sys/conf.h> 85 #include <sys/time.h> 86 #include <sys/kernel.h> 87 #include <sys/fcntl.h> 88 #include <sys/syslog.h> 89 #include <sys/kauth.h> 90 91 #include <sys/callout.h> 92 93 #include <dev/pci/pcireg.h> 94 #include <dev/pci/pcivar.h> 95 #include <dev/pci/pcidevs.h> 96 #include <dev/pci/czreg.h> 97 98 #include <dev/pci/plx9060reg.h> 99 #include <dev/pci/plx9060var.h> 100 101 #include <dev/microcode/cyclades-z/cyzfirm.h> 102 103 #define CZ_DRIVER_VERSION 0x20000411 104 105 #define CZ_POLL_MS 20 106 107 /* These are the interrupts we always use. */ 108 #define CZ_INTERRUPTS \ 109 (C_IN_MDSR | C_IN_MRI | C_IN_MRTS | C_IN_MCTS | C_IN_TXBEMPTY | \ 110 C_IN_TXFEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM | C_IN_RXNNDT | \ 111 C_IN_MDCD | C_IN_PR_ERROR | C_IN_FR_ERROR | C_IN_OVR_ERROR | \ 112 C_IN_RXOFL | C_IN_IOCTLW | C_IN_RXBRK) 113 114 /* 115 * cztty_softc: 116 * 117 * Per-channel (TTY) state. 118 */ 119 struct cztty_softc { 120 struct cz_softc *sc_parent; 121 struct tty *sc_tty; 122 123 struct callout sc_diag_ch; 124 125 int sc_channel; /* Also used to flag unattached chan */ 126 #define CZTTY_CHANNEL_DEAD -1 127 128 bus_space_tag_t sc_chan_st; /* channel space tag */ 129 bus_space_handle_t sc_chan_sh; /* channel space handle */ 130 bus_space_handle_t sc_buf_sh; /* buffer space handle */ 131 132 u_int sc_overflows, 133 sc_parity_errors, 134 sc_framing_errors, 135 sc_errors; 136 137 int sc_swflags; 138 139 u_int32_t sc_rs_control_dtr, 140 sc_chanctl_hw_flow, 141 sc_chanctl_comm_baud, 142 sc_chanctl_rs_control, 143 sc_chanctl_comm_data_l, 144 sc_chanctl_comm_parity; 145 }; 146 147 /* 148 * cz_softc: 149 * 150 * Per-board state. 151 */ 152 struct cz_softc { 153 struct device cz_dev; /* generic device info */ 154 struct plx9060_config cz_plx; /* PLX 9060 config info */ 155 bus_space_tag_t cz_win_st; /* window space tag */ 156 bus_space_handle_t cz_win_sh; /* window space handle */ 157 struct callout cz_callout; /* callout for polling-mode */ 158 159 void *cz_ih; /* interrupt handle */ 160 161 u_int32_t cz_mailbox0; /* our MAILBOX0 value */ 162 int cz_nchannels; /* number of channels */ 163 int cz_nopenchan; /* number of open channels */ 164 struct cztty_softc *cz_ports; /* our array of ports */ 165 166 bus_addr_t cz_fwctl; /* offset of firmware control */ 167 }; 168 169 static int cz_wait_pci_doorbell(struct cz_softc *, const char *); 170 171 static int cz_load_firmware(struct cz_softc *); 172 173 static int cz_intr(void *); 174 static void cz_poll(void *); 175 static int cztty_transmit(struct cztty_softc *, struct tty *); 176 static int cztty_receive(struct cztty_softc *, struct tty *); 177 178 static struct cztty_softc *cztty_getttysoftc(dev_t dev); 179 static int cztty_attached_ttys; 180 static int cz_timeout_ticks; 181 182 static void czttystart(struct tty *tp); 183 static int czttyparam(struct tty *tp, struct termios *t); 184 static void cztty_shutdown(struct cztty_softc *sc); 185 static void cztty_modem(struct cztty_softc *sc, int onoff); 186 static void cztty_break(struct cztty_softc *sc, int onoff); 187 static void tiocm_to_cztty(struct cztty_softc *sc, u_long how, int ttybits); 188 static int cztty_to_tiocm(struct cztty_softc *sc); 189 static void cztty_diag(void *arg); 190 191 extern struct cfdriver cz_cd; 192 193 /* 194 * Macros to read and write the PLX. 195 */ 196 #define CZ_PLX_READ(cz, reg) \ 197 bus_space_read_4((cz)->cz_plx.plx_st, (cz)->cz_plx.plx_sh, (reg)) 198 #define CZ_PLX_WRITE(cz, reg, val) \ 199 bus_space_write_4((cz)->cz_plx.plx_st, (cz)->cz_plx.plx_sh, \ 200 (reg), (val)) 201 202 /* 203 * Macros to read and write the FPGA. We must already be in the FPGA 204 * window for this. 205 */ 206 #define CZ_FPGA_READ(cz, reg) \ 207 bus_space_read_4((cz)->cz_win_st, (cz)->cz_win_sh, (reg)) 208 #define CZ_FPGA_WRITE(cz, reg, val) \ 209 bus_space_write_4((cz)->cz_win_st, (cz)->cz_win_sh, (reg), (val)) 210 211 /* 212 * Macros to read and write the firmware control structures in board RAM. 213 */ 214 #define CZ_FWCTL_READ(cz, off) \ 215 bus_space_read_4((cz)->cz_win_st, (cz)->cz_win_sh, \ 216 (cz)->cz_fwctl + (off)) 217 218 #define CZ_FWCTL_WRITE(cz, off, val) \ 219 bus_space_write_4((cz)->cz_win_st, (cz)->cz_win_sh, \ 220 (cz)->cz_fwctl + (off), (val)) 221 222 /* 223 * Convenience macros for cztty routines. PLX window MUST be to RAM. 224 */ 225 #define CZTTY_CHAN_READ(sc, off) \ 226 bus_space_read_4((sc)->sc_chan_st, (sc)->sc_chan_sh, (off)) 227 228 #define CZTTY_CHAN_WRITE(sc, off, val) \ 229 bus_space_write_4((sc)->sc_chan_st, (sc)->sc_chan_sh, \ 230 (off), (val)) 231 232 #define CZTTY_BUF_READ(sc, off) \ 233 bus_space_read_4((sc)->sc_chan_st, (sc)->sc_buf_sh, (off)) 234 235 #define CZTTY_BUF_WRITE(sc, off, val) \ 236 bus_space_write_4((sc)->sc_chan_st, (sc)->sc_buf_sh, \ 237 (off), (val)) 238 239 /* 240 * Convenience macros. 241 */ 242 #define CZ_WIN_RAM(cz) \ 243 do { \ 244 CZ_PLX_WRITE((cz), PLX_LAS0BA, LOCAL_ADDR0_RAM); \ 245 delay(100); \ 246 } while (0) 247 248 #define CZ_WIN_FPGA(cz) \ 249 do { \ 250 CZ_PLX_WRITE((cz), PLX_LAS0BA, LOCAL_ADDR0_FPGA); \ 251 delay(100); \ 252 } while (0) 253 254 /***************************************************************************** 255 * Cyclades-Z controller code starts here... 256 *****************************************************************************/ 257 258 /* 259 * cz_match: 260 * 261 * Determine if the given PCI device is a Cyclades-Z board. 262 */ 263 static int 264 cz_match(struct device *parent, 265 struct cfdata *match, 266 void *aux) 267 { 268 struct pci_attach_args *pa = aux; 269 270 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_CYCLADES) { 271 switch (PCI_PRODUCT(pa->pa_id)) { 272 case PCI_PRODUCT_CYCLADES_CYCLOMZ_2: 273 return (1); 274 } 275 } 276 277 return (0); 278 } 279 280 /* 281 * cz_attach: 282 * 283 * A Cyclades-Z board was found; attach it. 284 */ 285 static void 286 cz_attach(struct device *parent, 287 struct device *self, 288 void *aux) 289 { 290 extern const struct cdevsw cz_cdevsw; /* XXX */ 291 struct cz_softc *cz = (void *) self; 292 struct pci_attach_args *pa = aux; 293 pci_intr_handle_t ih; 294 const char *intrstr = NULL; 295 struct cztty_softc *sc; 296 struct tty *tp; 297 int i; 298 299 aprint_naive(": Multi-port serial controller\n"); 300 aprint_normal(": Cyclades-Z multiport serial\n"); 301 302 cz->cz_plx.plx_pc = pa->pa_pc; 303 cz->cz_plx.plx_tag = pa->pa_tag; 304 305 if (pci_mapreg_map(pa, PLX_PCI_RUNTIME_MEMADDR, 306 PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0, 307 &cz->cz_plx.plx_st, &cz->cz_plx.plx_sh, NULL, NULL) != 0) { 308 aprint_error("%s: unable to map PLX registers\n", 309 cz->cz_dev.dv_xname); 310 return; 311 } 312 if (pci_mapreg_map(pa, PLX_PCI_LOCAL_ADDR0, 313 PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0, 314 &cz->cz_win_st, &cz->cz_win_sh, NULL, NULL) != 0) { 315 aprint_error("%s: unable to map device window\n", 316 cz->cz_dev.dv_xname); 317 return; 318 } 319 320 cz->cz_mailbox0 = CZ_PLX_READ(cz, PLX_MAILBOX0); 321 cz->cz_nopenchan = 0; 322 323 /* 324 * Make sure that the board is completely stopped. 325 */ 326 CZ_WIN_FPGA(cz); 327 CZ_FPGA_WRITE(cz, FPGA_CPU_STOP, 0); 328 329 /* 330 * Load the board's firmware. 331 */ 332 if (cz_load_firmware(cz) != 0) 333 return; 334 335 /* 336 * Now that we're ready to roll, map and establish the interrupt 337 * handler. 338 */ 339 if (pci_intr_map(pa, &ih) != 0) { 340 /* 341 * The common case is for Cyclades-Z boards to run 342 * in polling mode, and thus not have an interrupt 343 * mapped for them. Don't bother reporting that 344 * the interrupt is not mappable, since this isn't 345 * really an error. 346 */ 347 cz->cz_ih = NULL; 348 goto polling_mode; 349 } else { 350 intrstr = pci_intr_string(pa->pa_pc, ih); 351 cz->cz_ih = pci_intr_establish(pa->pa_pc, ih, IPL_TTY, 352 cz_intr, cz); 353 } 354 if (cz->cz_ih == NULL) { 355 aprint_error("%s: unable to establish interrupt", 356 cz->cz_dev.dv_xname); 357 if (intrstr != NULL) 358 aprint_normal(" at %s", intrstr); 359 aprint_normal("\n"); 360 /* We will fall-back on polling mode. */ 361 } else 362 aprint_normal("%s: interrupting at %s\n", 363 cz->cz_dev.dv_xname, intrstr); 364 365 polling_mode: 366 if (cz->cz_ih == NULL) { 367 callout_init(&cz->cz_callout); 368 if (cz_timeout_ticks == 0) 369 cz_timeout_ticks = max(1, hz * CZ_POLL_MS / 1000); 370 aprint_normal("%s: polling mode, %d ms interval (%d tick%s)\n", 371 cz->cz_dev.dv_xname, CZ_POLL_MS, cz_timeout_ticks, 372 cz_timeout_ticks == 1 ? "" : "s"); 373 } 374 375 /* 376 * Allocate sufficient pointers for the children and 377 * attach them. Set all ports to a reasonable initial 378 * configuration while we're at it: 379 * 380 * disabled 381 * 8N1 382 * default baud rate 383 * hardware flow control. 384 */ 385 CZ_WIN_RAM(cz); 386 387 if (cz->cz_nchannels == 0) { 388 /* No channels? No more work to do! */ 389 return; 390 } 391 392 cz->cz_ports = malloc(sizeof(struct cztty_softc) * cz->cz_nchannels, 393 M_DEVBUF, M_WAITOK|M_ZERO); 394 cztty_attached_ttys += cz->cz_nchannels; 395 396 for (i = 0; i < cz->cz_nchannels; i++) { 397 sc = &cz->cz_ports[i]; 398 399 sc->sc_channel = i; 400 sc->sc_chan_st = cz->cz_win_st; 401 sc->sc_parent = cz; 402 403 if (bus_space_subregion(cz->cz_win_st, cz->cz_win_sh, 404 cz->cz_fwctl + ZFIRM_CHNCTL_OFF(i, 0), 405 ZFIRM_CHNCTL_SIZE, &sc->sc_chan_sh)) { 406 aprint_error( 407 "%s: unable to subregion channel %d control\n", 408 cz->cz_dev.dv_xname, i); 409 sc->sc_channel = CZTTY_CHANNEL_DEAD; 410 continue; 411 } 412 if (bus_space_subregion(cz->cz_win_st, cz->cz_win_sh, 413 cz->cz_fwctl + ZFIRM_BUFCTL_OFF(i, 0), 414 ZFIRM_BUFCTL_SIZE, &sc->sc_buf_sh)) { 415 aprint_error( 416 "%s: unable to subregion channel %d buffer\n", 417 cz->cz_dev.dv_xname, i); 418 sc->sc_channel = CZTTY_CHANNEL_DEAD; 419 continue; 420 } 421 422 callout_init(&sc->sc_diag_ch); 423 424 tp = ttymalloc(); 425 tp->t_dev = makedev(cdevsw_lookup_major(&cz_cdevsw), 426 (device_unit(&cz->cz_dev) * ZFIRM_MAX_CHANNELS) + i); 427 tp->t_oproc = czttystart; 428 tp->t_param = czttyparam; 429 tty_attach(tp); 430 431 sc->sc_tty = tp; 432 433 CZTTY_CHAN_WRITE(sc, CHNCTL_OP_MODE, C_CH_DISABLE); 434 CZTTY_CHAN_WRITE(sc, CHNCTL_INTR_ENABLE, CZ_INTERRUPTS); 435 CZTTY_CHAN_WRITE(sc, CHNCTL_SW_FLOW, 0); 436 CZTTY_CHAN_WRITE(sc, CHNCTL_FLOW_XON, 0x11); 437 CZTTY_CHAN_WRITE(sc, CHNCTL_FLOW_XOFF, 0x13); 438 CZTTY_CHAN_WRITE(sc, CHNCTL_COMM_BAUD, TTYDEF_SPEED); 439 CZTTY_CHAN_WRITE(sc, CHNCTL_COMM_PARITY, C_PR_NONE); 440 CZTTY_CHAN_WRITE(sc, CHNCTL_COMM_DATA_L, C_DL_CS8 | C_DL_1STOP); 441 CZTTY_CHAN_WRITE(sc, CHNCTL_COMM_FLAGS, 0); 442 CZTTY_CHAN_WRITE(sc, CHNCTL_HW_FLOW, C_RS_CTS | C_RS_RTS); 443 CZTTY_CHAN_WRITE(sc, CHNCTL_RS_CONTROL, 0); 444 } 445 } 446 447 CFATTACH_DECL(cz, sizeof(struct cz_softc), 448 cz_match, cz_attach, NULL, NULL); 449 450 #if 0 451 /* 452 * cz_reset_board: 453 * 454 * Reset the board via the PLX. 455 */ 456 static void 457 cz_reset_board(struct cz_softc *cz) 458 { 459 u_int32_t reg; 460 461 reg = CZ_PLX_READ(cz, PLX_CONTROL); 462 CZ_PLX_WRITE(cz, PLX_CONTROL, reg | CONTROL_SWR); 463 delay(1000); 464 465 CZ_PLX_WRITE(cz, PLX_CONTROL, reg); 466 delay(1000); 467 468 /* Now reload the PLX from its EEPROM. */ 469 reg = CZ_PLX_READ(cz, PLX_CONTROL); 470 CZ_PLX_WRITE(cz, PLX_CONTROL, reg | CONTROL_RELOADCFG); 471 delay(1000); 472 CZ_PLX_WRITE(cz, PLX_CONTROL, reg); 473 } 474 #endif 475 476 /* 477 * cz_load_firmware: 478 * 479 * Load the ZFIRM firmware into the board's RAM and start it 480 * running. 481 */ 482 static int 483 cz_load_firmware(struct cz_softc *cz) 484 { 485 const struct zfirm_header *zfh; 486 const struct zfirm_config *zfc; 487 const struct zfirm_block *zfb, *zblocks; 488 const u_int8_t *cp; 489 const char *board; 490 u_int32_t fid; 491 int i, j, nconfigs, nblocks, nbytes; 492 493 zfh = (const struct zfirm_header *) cycladesz_firmware; 494 495 /* Find the config header. */ 496 if (le32toh(zfh->zfh_configoff) & (sizeof(u_int32_t) - 1)) { 497 aprint_error("%s: bad ZFIRM config offset: 0x%x\n", 498 cz->cz_dev.dv_xname, le32toh(zfh->zfh_configoff)); 499 return (EIO); 500 } 501 zfc = (const struct zfirm_config *)(cycladesz_firmware + 502 le32toh(zfh->zfh_configoff)); 503 nconfigs = le32toh(zfh->zfh_nconfig); 504 505 /* Locate the correct configuration for our board. */ 506 for (i = 0; i < nconfigs; i++, zfc++) { 507 if (le32toh(zfc->zfc_mailbox) == cz->cz_mailbox0 && 508 le32toh(zfc->zfc_function) == ZFC_FUNCTION_NORMAL) 509 break; 510 } 511 if (i == nconfigs) { 512 aprint_error("%s: unable to locate config header\n", 513 cz->cz_dev.dv_xname); 514 return (EIO); 515 } 516 517 nblocks = le32toh(zfc->zfc_nblocks); 518 zblocks = (const struct zfirm_block *)(cycladesz_firmware + 519 le32toh(zfh->zfh_blockoff)); 520 521 /* 522 * 8Zo ver. 1 doesn't have an FPGA. Load it on all others if 523 * necessary. 524 */ 525 if (cz->cz_mailbox0 != MAILBOX0_8Zo_V1 526 #if 0 527 && ((CZ_PLX_READ(cz, PLX_CONTROL) & CONTROL_FPGA_LOADED) == 0) 528 #endif 529 ) { 530 #ifdef CZ_DEBUG 531 aprint_debug("%s: Loading FPGA...", cz->cz_dev.dv_xname); 532 #endif 533 CZ_WIN_FPGA(cz); 534 for (i = 0; i < nblocks; i++) { 535 /* zfb = zblocks + le32toh(zfc->zfc_blocklist[i]) ?? */ 536 zfb = &zblocks[le32toh(zfc->zfc_blocklist[i])]; 537 if (le32toh(zfb->zfb_type) == ZFB_TYPE_FPGA) { 538 nbytes = le32toh(zfb->zfb_size); 539 cp = &cycladesz_firmware[ 540 le32toh(zfb->zfb_fileoff)]; 541 for (j = 0; j < nbytes; j++, cp++) { 542 bus_space_write_1(cz->cz_win_st, 543 cz->cz_win_sh, 0, *cp); 544 /* FPGA needs 30-100us to settle. */ 545 delay(10); 546 } 547 } 548 } 549 #ifdef CZ_DEBUG 550 aprint_debug("done\n"); 551 #endif 552 } 553 554 /* Now load the firmware. */ 555 CZ_WIN_RAM(cz); 556 557 for (i = 0; i < nblocks; i++) { 558 /* zfb = zblocks + le32toh(zfc->zfc_blocklist[i]) ?? */ 559 zfb = &zblocks[le32toh(zfc->zfc_blocklist[i])]; 560 if (le32toh(zfb->zfb_type) == ZFB_TYPE_FIRMWARE) { 561 const u_int32_t *lp; 562 u_int32_t ro = le32toh(zfb->zfb_ramoff); 563 nbytes = le32toh(zfb->zfb_size); 564 lp = (const u_int32_t *) 565 &cycladesz_firmware[le32toh(zfb->zfb_fileoff)]; 566 for (j = 0; j < nbytes; j += 4, lp++) { 567 bus_space_write_4(cz->cz_win_st, cz->cz_win_sh, 568 ro + j, le32toh(*lp)); 569 delay(10); 570 } 571 } 572 } 573 574 /* Now restart the MIPS. */ 575 CZ_WIN_FPGA(cz); 576 CZ_FPGA_WRITE(cz, FPGA_CPU_START, 0); 577 578 /* Wait for the MIPS to start, then report the results. */ 579 CZ_WIN_RAM(cz); 580 581 #ifdef CZ_DEBUG 582 aprint_debug("%s: waiting for MIPS to start", cz->cz_dev.dv_xname); 583 #endif 584 for (i = 0; i < 100; i++) { 585 fid = bus_space_read_4(cz->cz_win_st, cz->cz_win_sh, 586 ZFIRM_SIG_OFF); 587 if (fid == ZFIRM_SIG) { 588 /* MIPS has booted. */ 589 break; 590 } else if (fid == ZFIRM_HLT) { 591 /* 592 * The MIPS has halted, usually due to a power 593 * shortage on the expansion module. 594 */ 595 aprint_error("%s: MIPS halted; possible power supply " 596 "problem\n", cz->cz_dev.dv_xname); 597 return (EIO); 598 } else { 599 #ifdef CZ_DEBUG 600 if ((i % 8) == 0) 601 aprint_debug("."); 602 #endif 603 delay(250000); 604 } 605 } 606 #ifdef CZ_DEBUG 607 aprint_debug("\n"); 608 #endif 609 if (i == 100) { 610 CZ_WIN_FPGA(cz); 611 aprint_error( 612 "%s: MIPS failed to start; wanted 0x%08x got 0x%08x\n", 613 cz->cz_dev.dv_xname, ZFIRM_SIG, fid); 614 aprint_error("%s: FPGA ID 0x%08x, FPGA version 0x%08x\n", 615 cz->cz_dev.dv_xname, CZ_FPGA_READ(cz, FPGA_ID), 616 CZ_FPGA_READ(cz, FPGA_VERSION)); 617 return (EIO); 618 } 619 620 /* 621 * Locate the firmware control structures. 622 */ 623 cz->cz_fwctl = bus_space_read_4(cz->cz_win_st, cz->cz_win_sh, 624 ZFIRM_CTRLADDR_OFF); 625 #ifdef CZ_DEBUG 626 aprint_debug("%s: FWCTL structure at offset 0x%08lx\n", 627 cz->cz_dev.dv_xname, cz->cz_fwctl); 628 #endif 629 630 CZ_FWCTL_WRITE(cz, BRDCTL_C_OS, C_OS_BSD); 631 CZ_FWCTL_WRITE(cz, BRDCTL_DRVERSION, CZ_DRIVER_VERSION); 632 633 cz->cz_nchannels = CZ_FWCTL_READ(cz, BRDCTL_NCHANNEL); 634 635 switch (cz->cz_mailbox0) { 636 case MAILBOX0_8Zo_V1: 637 board = "Cyclades-8Zo ver. 1"; 638 break; 639 640 case MAILBOX0_8Zo_V2: 641 board = "Cyclades-8Zo ver. 2"; 642 break; 643 644 case MAILBOX0_Ze_V1: 645 board = "Cyclades-Ze"; 646 break; 647 648 default: 649 board = "unknown Cyclades Z-series"; 650 break; 651 } 652 653 fid = CZ_FWCTL_READ(cz, BRDCTL_FWVERSION); 654 aprint_normal("%s: %s, ", cz->cz_dev.dv_xname, board); 655 if (cz->cz_nchannels == 0) 656 aprint_normal("no channels attached, "); 657 else 658 aprint_normal("%d channels (ttyCZ%04d..ttyCZ%04d), ", 659 cz->cz_nchannels, cztty_attached_ttys, 660 cztty_attached_ttys + (cz->cz_nchannels - 1)); 661 aprint_normal("firmware %x.%x.%x\n", 662 (fid >> 8) & 0xf, (fid >> 4) & 0xf, fid & 0xf); 663 664 return (0); 665 } 666 667 /* 668 * cz_poll: 669 * 670 * This card doesn't do interrupts, so scan it for activity every CZ_POLL_MS 671 * ms. 672 */ 673 static void 674 cz_poll(void *arg) 675 { 676 int s = spltty(); 677 struct cz_softc *cz = arg; 678 679 cz_intr(cz); 680 callout_reset(&cz->cz_callout, cz_timeout_ticks, cz_poll, cz); 681 682 splx(s); 683 } 684 685 /* 686 * cz_intr: 687 * 688 * Interrupt service routine. 689 * 690 * We either are receiving an interrupt directly from the board, or we are 691 * in polling mode and it's time to poll. 692 */ 693 static int 694 cz_intr(void *arg) 695 { 696 int rval = 0; 697 u_int command, channel, param; 698 struct cz_softc *cz = arg; 699 struct cztty_softc *sc; 700 struct tty *tp; 701 702 while ((command = (CZ_PLX_READ(cz, PLX_LOCAL_PCI_DOORBELL) & 0xff))) { 703 rval = 1; 704 channel = CZ_FWCTL_READ(cz, BRDCTL_FWCMD_CHANNEL); 705 param = CZ_FWCTL_READ(cz, BRDCTL_FWCMD_PARAM); 706 707 /* now clear this interrupt, posslibly enabling another */ 708 CZ_PLX_WRITE(cz, PLX_LOCAL_PCI_DOORBELL, command); 709 710 if (cz->cz_ports == NULL) { 711 #ifdef CZ_DEBUG 712 printf("%s: interrupt on channel %d, but no channels\n", 713 cz->cz_dev.dv_xname, channel); 714 #endif 715 continue; 716 } 717 718 sc = &cz->cz_ports[channel]; 719 720 if (sc->sc_channel == CZTTY_CHANNEL_DEAD) 721 break; 722 723 tp = sc->sc_tty; 724 725 switch (command) { 726 case C_CM_TXFEMPTY: /* transmit cases */ 727 case C_CM_TXBEMPTY: 728 case C_CM_TXLOWWM: 729 case C_CM_INTBACK: 730 if (!ISSET(tp->t_state, TS_ISOPEN)) { 731 #ifdef CZ_DEBUG 732 printf("%s: tx intr on closed channel %d\n", 733 cz->cz_dev.dv_xname, channel); 734 #endif 735 break; 736 } 737 738 if (cztty_transmit(sc, tp)) { 739 /* 740 * Do wakeup stuff here. 741 */ 742 ttwakeup(tp); 743 wakeup(tp); 744 } 745 break; 746 747 case C_CM_RXNNDT: /* receive cases */ 748 case C_CM_RXHIWM: 749 case C_CM_INTBACK2: /* from restart ?? */ 750 #if 0 751 case C_CM_ICHAR: 752 #endif 753 if (!ISSET(tp->t_state, TS_ISOPEN)) { 754 CZTTY_BUF_WRITE(sc, BUFCTL_RX_GET, 755 CZTTY_BUF_READ(sc, BUFCTL_RX_PUT)); 756 break; 757 } 758 759 if (cztty_receive(sc, tp)) { 760 /* 761 * Do wakeup stuff here. 762 */ 763 ttwakeup(tp); 764 wakeup(tp); 765 } 766 break; 767 768 case C_CM_MDCD: 769 if (!ISSET(tp->t_state, TS_ISOPEN)) 770 break; 771 772 (void) (*tp->t_linesw->l_modem)(tp, 773 ISSET(C_RS_DCD, CZTTY_CHAN_READ(sc, 774 CHNCTL_RS_STATUS))); 775 break; 776 777 case C_CM_MDSR: 778 case C_CM_MRI: 779 case C_CM_MCTS: 780 case C_CM_MRTS: 781 break; 782 783 case C_CM_IOCTLW: 784 break; 785 786 case C_CM_PR_ERROR: 787 sc->sc_parity_errors++; 788 goto error_common; 789 790 case C_CM_FR_ERROR: 791 sc->sc_framing_errors++; 792 goto error_common; 793 794 case C_CM_OVR_ERROR: 795 sc->sc_overflows++; 796 error_common: 797 if (sc->sc_errors++ == 0) 798 callout_reset(&sc->sc_diag_ch, 60 * hz, 799 cztty_diag, sc); 800 break; 801 802 case C_CM_RXBRK: 803 if (!ISSET(tp->t_state, TS_ISOPEN)) 804 break; 805 806 /* 807 * A break is a \000 character with TTY_FE error 808 * flags set. So TTY_FE by itself works. 809 */ 810 (*tp->t_linesw->l_rint)(TTY_FE, tp); 811 ttwakeup(tp); 812 wakeup(tp); 813 break; 814 815 default: 816 #ifdef CZ_DEBUG 817 printf("%s: channel %d: Unknown interrupt 0x%x\n", 818 cz->cz_dev.dv_xname, sc->sc_channel, command); 819 #endif 820 break; 821 } 822 } 823 824 return (rval); 825 } 826 827 /* 828 * cz_wait_pci_doorbell: 829 * 830 * Wait for the pci doorbell to be clear - wait for pending 831 * activity to drain. 832 */ 833 static int 834 cz_wait_pci_doorbell(struct cz_softc *cz, const char *wstring) 835 { 836 int error; 837 838 while (CZ_PLX_READ(cz, PLX_PCI_LOCAL_DOORBELL)) { 839 error = tsleep(cz, TTIPRI | PCATCH, wstring, max(1, hz/100)); 840 if ((error != 0) && (error != EWOULDBLOCK)) 841 return (error); 842 } 843 return (0); 844 } 845 846 /***************************************************************************** 847 * Cyclades-Z TTY code starts here... 848 *****************************************************************************/ 849 850 #define CZTTYDIALOUT_MASK 0x80000 851 852 #define CZTTY_DIALOUT(dev) (minor((dev)) & CZTTYDIALOUT_MASK) 853 #define CZTTY_CZ(sc) ((sc)->sc_parent) 854 855 #define CZTTY_SOFTC(dev) cztty_getttysoftc(dev) 856 857 static struct cztty_softc * 858 cztty_getttysoftc(dev_t dev) 859 { 860 int i, j, k = 0, u = minor(dev) & ~CZTTYDIALOUT_MASK; 861 struct cz_softc *cz = NULL; 862 863 for (i = 0, j = 0; i < cz_cd.cd_ndevs; i++) { 864 k = j; 865 cz = device_lookup(&cz_cd, i); 866 if (cz == NULL) 867 continue; 868 if (cz->cz_ports == NULL) 869 continue; 870 j += cz->cz_nchannels; 871 if (j > u) 872 break; 873 } 874 875 if (i >= cz_cd.cd_ndevs) 876 return (NULL); 877 else 878 return (&cz->cz_ports[u - k]); 879 } 880 881 /* 882 * czttytty: 883 * 884 * Return a pointer to our tty. 885 */ 886 static struct tty * 887 czttytty(dev_t dev) 888 { 889 struct cztty_softc *sc = CZTTY_SOFTC(dev); 890 891 #ifdef DIAGNOSTIC 892 if (sc == NULL) 893 panic("czttytty"); 894 #endif 895 896 return (sc->sc_tty); 897 } 898 899 /* 900 * cztty_shutdown: 901 * 902 * Shut down a port. 903 */ 904 static void 905 cztty_shutdown(struct cztty_softc *sc) 906 { 907 struct cz_softc *cz = CZTTY_CZ(sc); 908 struct tty *tp = sc->sc_tty; 909 int s; 910 911 s = spltty(); 912 913 /* Clear any break condition set with TIOCSBRK. */ 914 cztty_break(sc, 0); 915 916 /* 917 * Hang up if necessary. Wait a bit, so the other side has time to 918 * notice even if we immediately open the port again. 919 */ 920 if (ISSET(tp->t_cflag, HUPCL)) { 921 cztty_modem(sc, 0); 922 (void) tsleep(tp, TTIPRI, ttclos, hz); 923 } 924 925 /* Disable the channel. */ 926 cz_wait_pci_doorbell(cz, "czdis"); 927 CZTTY_CHAN_WRITE(sc, CHNCTL_OP_MODE, C_CH_DISABLE); 928 CZ_FWCTL_WRITE(cz, BRDCTL_HCMD_CHANNEL, sc->sc_channel); 929 CZ_PLX_WRITE(cz, PLX_PCI_LOCAL_DOORBELL, C_CM_IOCTL); 930 931 if ((--cz->cz_nopenchan == 0) && (cz->cz_ih == NULL)) { 932 #ifdef CZ_DEBUG 933 printf("%s: Disabling polling\n", cz->cz_dev.dv_xname); 934 #endif 935 callout_stop(&cz->cz_callout); 936 } 937 938 splx(s); 939 } 940 941 /* 942 * czttyopen: 943 * 944 * Open a Cyclades-Z serial port. 945 */ 946 static int 947 czttyopen(dev_t dev, int flags, int mode, struct lwp *l) 948 { 949 struct cztty_softc *sc = CZTTY_SOFTC(dev); 950 struct cz_softc *cz; 951 struct tty *tp; 952 int s, error; 953 954 if (sc == NULL) 955 return (ENXIO); 956 957 if (sc->sc_channel == CZTTY_CHANNEL_DEAD) 958 return (ENXIO); 959 960 cz = CZTTY_CZ(sc); 961 tp = sc->sc_tty; 962 963 if (ISSET(tp->t_state, TS_ISOPEN) && 964 ISSET(tp->t_state, TS_XCLUDE) && 965 kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, 966 &l->l_acflag) != 0) 967 return (EBUSY); 968 969 s = spltty(); 970 971 /* 972 * Do the following iff this is a first open. 973 */ 974 if (!ISSET(tp->t_state, TS_ISOPEN) && (tp->t_wopen == 0)) { 975 struct termios t; 976 977 tp->t_dev = dev; 978 979 /* If we're turning things on, enable interrupts */ 980 if ((cz->cz_nopenchan++ == 0) && (cz->cz_ih == NULL)) { 981 #ifdef CZ_DEBUG 982 printf("%s: Enabling polling.\n", 983 cz->cz_dev.dv_xname); 984 #endif 985 callout_reset(&cz->cz_callout, cz_timeout_ticks, 986 cz_poll, cz); 987 } 988 989 /* 990 * Enable the channel. Don't actually ring the 991 * doorbell here; czttyparam() will do it for us. 992 */ 993 cz_wait_pci_doorbell(cz, "czopen"); 994 995 CZTTY_CHAN_WRITE(sc, CHNCTL_OP_MODE, C_CH_ENABLE); 996 997 /* 998 * Initialize the termios status to the defaults. Add in the 999 * sticky bits from TIOCSFLAGS. 1000 */ 1001 t.c_ispeed = 0; 1002 t.c_ospeed = TTYDEF_SPEED; 1003 t.c_cflag = TTYDEF_CFLAG; 1004 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 1005 SET(t.c_cflag, CLOCAL); 1006 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 1007 SET(t.c_cflag, CRTSCTS); 1008 1009 /* 1010 * Reset the input and output rings. Do this before 1011 * we call czttyparam(), as that function enables 1012 * the channel. 1013 */ 1014 CZTTY_BUF_WRITE(sc, BUFCTL_RX_GET, 1015 CZTTY_BUF_READ(sc, BUFCTL_RX_PUT)); 1016 CZTTY_BUF_WRITE(sc, BUFCTL_TX_PUT, 1017 CZTTY_BUF_READ(sc, BUFCTL_TX_GET)); 1018 1019 /* Make sure czttyparam() will see changes. */ 1020 tp->t_ospeed = 0; 1021 (void) czttyparam(tp, &t); 1022 tp->t_iflag = TTYDEF_IFLAG; 1023 tp->t_oflag = TTYDEF_OFLAG; 1024 tp->t_lflag = TTYDEF_LFLAG; 1025 ttychars(tp); 1026 ttsetwater(tp); 1027 1028 /* 1029 * Turn on DTR. We must always do this, even if carrier is not 1030 * present, because otherwise we'd have to use TIOCSDTR 1031 * immediately after setting CLOCAL, which applications do not 1032 * expect. We always assert DTR while the device is open 1033 * unless explicitly requested to deassert it. 1034 */ 1035 cztty_modem(sc, 1); 1036 } 1037 1038 splx(s); 1039 1040 error = ttyopen(tp, CZTTY_DIALOUT(dev), ISSET(flags, O_NONBLOCK)); 1041 if (error) 1042 goto bad; 1043 1044 error = (*tp->t_linesw->l_open)(dev, tp); 1045 if (error) 1046 goto bad; 1047 1048 return (0); 1049 1050 bad: 1051 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 1052 /* 1053 * We failed to open the device, and nobody else had it opened. 1054 * Clean up the state as appropriate. 1055 */ 1056 cztty_shutdown(sc); 1057 } 1058 1059 return (error); 1060 } 1061 1062 /* 1063 * czttyclose: 1064 * 1065 * Close a Cyclades-Z serial port. 1066 */ 1067 static int 1068 czttyclose(dev_t dev, int flags, int mode, struct lwp *l) 1069 { 1070 struct cztty_softc *sc = CZTTY_SOFTC(dev); 1071 struct tty *tp = sc->sc_tty; 1072 1073 /* XXX This is for cons.c. */ 1074 if (!ISSET(tp->t_state, TS_ISOPEN)) 1075 return (0); 1076 1077 (*tp->t_linesw->l_close)(tp, flags); 1078 ttyclose(tp); 1079 1080 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 1081 /* 1082 * Although we got a last close, the device may still be in 1083 * use; e.g. if this was the dialout node, and there are still 1084 * processes waiting for carrier on the non-dialout node. 1085 */ 1086 cztty_shutdown(sc); 1087 } 1088 1089 return (0); 1090 } 1091 1092 /* 1093 * czttyread: 1094 * 1095 * Read from a Cyclades-Z serial port. 1096 */ 1097 static int 1098 czttyread(dev_t dev, struct uio *uio, int flags) 1099 { 1100 struct cztty_softc *sc = CZTTY_SOFTC(dev); 1101 struct tty *tp = sc->sc_tty; 1102 1103 return ((*tp->t_linesw->l_read)(tp, uio, flags)); 1104 } 1105 1106 /* 1107 * czttywrite: 1108 * 1109 * Write to a Cyclades-Z serial port. 1110 */ 1111 static int 1112 czttywrite(dev_t dev, struct uio *uio, int flags) 1113 { 1114 struct cztty_softc *sc = CZTTY_SOFTC(dev); 1115 struct tty *tp = sc->sc_tty; 1116 1117 return ((*tp->t_linesw->l_write)(tp, uio, flags)); 1118 } 1119 1120 /* 1121 * czttypoll: 1122 * 1123 * Poll a Cyclades-Z serial port. 1124 */ 1125 static int 1126 czttypoll(dev_t dev, int events, struct lwp *l) 1127 { 1128 struct cztty_softc *sc = CZTTY_SOFTC(dev); 1129 struct tty *tp = sc->sc_tty; 1130 1131 return ((*tp->t_linesw->l_poll)(tp, events, l)); 1132 } 1133 1134 /* 1135 * czttyioctl: 1136 * 1137 * Perform a control operation on a Cyclades-Z serial port. 1138 */ 1139 static int 1140 czttyioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l) 1141 { 1142 struct cztty_softc *sc = CZTTY_SOFTC(dev); 1143 struct tty *tp = sc->sc_tty; 1144 int s, error; 1145 1146 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 1147 if (error != EPASSTHROUGH) 1148 return (error); 1149 1150 error = ttioctl(tp, cmd, data, flag, l); 1151 if (error != EPASSTHROUGH) 1152 return (error); 1153 1154 error = 0; 1155 1156 s = spltty(); 1157 1158 switch (cmd) { 1159 case TIOCSBRK: 1160 cztty_break(sc, 1); 1161 break; 1162 1163 case TIOCCBRK: 1164 cztty_break(sc, 0); 1165 break; 1166 1167 case TIOCGFLAGS: 1168 *(int *)data = sc->sc_swflags; 1169 break; 1170 1171 case TIOCSFLAGS: 1172 error = kauth_authorize_generic(l->l_cred, 1173 KAUTH_GENERIC_ISSUSER, &l->l_acflag); 1174 if (error) 1175 break; 1176 sc->sc_swflags = *(int *)data; 1177 break; 1178 1179 case TIOCSDTR: 1180 cztty_modem(sc, 1); 1181 break; 1182 1183 case TIOCCDTR: 1184 cztty_modem(sc, 0); 1185 break; 1186 1187 case TIOCMSET: 1188 case TIOCMBIS: 1189 case TIOCMBIC: 1190 tiocm_to_cztty(sc, cmd, *(int *)data); 1191 break; 1192 1193 case TIOCMGET: 1194 *(int *)data = cztty_to_tiocm(sc); 1195 break; 1196 1197 default: 1198 error = EPASSTHROUGH; 1199 break; 1200 } 1201 1202 splx(s); 1203 1204 return (error); 1205 } 1206 1207 /* 1208 * cztty_break: 1209 * 1210 * Set or clear BREAK on a port. 1211 */ 1212 static void 1213 cztty_break(struct cztty_softc *sc, int onoff) 1214 { 1215 struct cz_softc *cz = CZTTY_CZ(sc); 1216 1217 cz_wait_pci_doorbell(cz, "czbreak"); 1218 1219 CZ_FWCTL_WRITE(cz, BRDCTL_HCMD_CHANNEL, sc->sc_channel); 1220 CZ_PLX_WRITE(cz, PLX_PCI_LOCAL_DOORBELL, 1221 onoff ? C_CM_SET_BREAK : C_CM_CLR_BREAK); 1222 } 1223 1224 /* 1225 * cztty_modem: 1226 * 1227 * Set or clear DTR on a port. 1228 */ 1229 static void 1230 cztty_modem(struct cztty_softc *sc, int onoff) 1231 { 1232 struct cz_softc *cz = CZTTY_CZ(sc); 1233 1234 if (sc->sc_rs_control_dtr == 0) 1235 return; 1236 1237 cz_wait_pci_doorbell(cz, "czmod"); 1238 1239 if (onoff) 1240 sc->sc_chanctl_rs_control |= sc->sc_rs_control_dtr; 1241 else 1242 sc->sc_chanctl_rs_control &= ~sc->sc_rs_control_dtr; 1243 CZTTY_CHAN_WRITE(sc, CHNCTL_RS_CONTROL, sc->sc_chanctl_rs_control); 1244 1245 CZ_FWCTL_WRITE(cz, BRDCTL_HCMD_CHANNEL, sc->sc_channel); 1246 CZ_PLX_WRITE(cz, PLX_PCI_LOCAL_DOORBELL, C_CM_IOCTLM); 1247 } 1248 1249 /* 1250 * tiocm_to_cztty: 1251 * 1252 * Process TIOCM* ioctls. 1253 */ 1254 static void 1255 tiocm_to_cztty(struct cztty_softc *sc, u_long how, int ttybits) 1256 { 1257 struct cz_softc *cz = CZTTY_CZ(sc); 1258 u_int32_t czttybits; 1259 1260 czttybits = 0; 1261 if (ISSET(ttybits, TIOCM_DTR)) 1262 SET(czttybits, C_RS_DTR); 1263 if (ISSET(ttybits, TIOCM_RTS)) 1264 SET(czttybits, C_RS_RTS); 1265 1266 cz_wait_pci_doorbell(cz, "cztiocm"); 1267 1268 switch (how) { 1269 case TIOCMBIC: 1270 CLR(sc->sc_chanctl_rs_control, czttybits); 1271 break; 1272 1273 case TIOCMBIS: 1274 SET(sc->sc_chanctl_rs_control, czttybits); 1275 break; 1276 1277 case TIOCMSET: 1278 CLR(sc->sc_chanctl_rs_control, C_RS_DTR | C_RS_RTS); 1279 SET(sc->sc_chanctl_rs_control, czttybits); 1280 break; 1281 } 1282 1283 CZTTY_CHAN_WRITE(sc, CHNCTL_RS_CONTROL, sc->sc_chanctl_rs_control); 1284 1285 CZ_FWCTL_WRITE(cz, BRDCTL_HCMD_CHANNEL, sc->sc_channel); 1286 CZ_PLX_WRITE(cz, PLX_PCI_LOCAL_DOORBELL, C_CM_IOCTLM); 1287 } 1288 1289 /* 1290 * cztty_to_tiocm: 1291 * 1292 * Process the TIOCMGET ioctl. 1293 */ 1294 static int 1295 cztty_to_tiocm(struct cztty_softc *sc) 1296 { 1297 struct cz_softc *cz = CZTTY_CZ(sc); 1298 u_int32_t rs_status, op_mode; 1299 int ttybits = 0; 1300 1301 cz_wait_pci_doorbell(cz, "cztty"); 1302 1303 rs_status = CZTTY_CHAN_READ(sc, CHNCTL_RS_STATUS); 1304 op_mode = CZTTY_CHAN_READ(sc, CHNCTL_OP_MODE); 1305 1306 if (ISSET(rs_status, C_RS_RTS)) 1307 SET(ttybits, TIOCM_RTS); 1308 if (ISSET(rs_status, C_RS_CTS)) 1309 SET(ttybits, TIOCM_CTS); 1310 if (ISSET(rs_status, C_RS_DCD)) 1311 SET(ttybits, TIOCM_CAR); 1312 if (ISSET(rs_status, C_RS_DTR)) 1313 SET(ttybits, TIOCM_DTR); 1314 if (ISSET(rs_status, C_RS_RI)) 1315 SET(ttybits, TIOCM_RNG); 1316 if (ISSET(rs_status, C_RS_DSR)) 1317 SET(ttybits, TIOCM_DSR); 1318 1319 if (ISSET(op_mode, C_CH_ENABLE)) 1320 SET(ttybits, TIOCM_LE); 1321 1322 return (ttybits); 1323 } 1324 1325 /* 1326 * czttyparam: 1327 * 1328 * Set Cyclades-Z serial port parameters from termios. 1329 * 1330 * XXX Should just copy the whole termios after making 1331 * XXX sure all the changes could be done. 1332 */ 1333 static int 1334 czttyparam(struct tty *tp, struct termios *t) 1335 { 1336 struct cztty_softc *sc = CZTTY_SOFTC(tp->t_dev); 1337 struct cz_softc *cz = CZTTY_CZ(sc); 1338 u_int32_t rs_status; 1339 int ospeed, cflag; 1340 1341 ospeed = t->c_ospeed; 1342 cflag = t->c_cflag; 1343 1344 /* Check requested parameters. */ 1345 if (ospeed < 0) 1346 return (EINVAL); 1347 if (t->c_ispeed && t->c_ispeed != ospeed) 1348 return (EINVAL); 1349 1350 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 1351 SET(cflag, CLOCAL); 1352 CLR(cflag, HUPCL); 1353 } 1354 1355 /* 1356 * If there were no changes, don't do anything. This avoids dropping 1357 * input and improves performance when all we did was frob things like 1358 * VMIN and VTIME. 1359 */ 1360 if (tp->t_ospeed == ospeed && 1361 tp->t_cflag == cflag) 1362 return (0); 1363 1364 /* Data bits. */ 1365 sc->sc_chanctl_comm_data_l = 0; 1366 switch (t->c_cflag & CSIZE) { 1367 case CS5: 1368 sc->sc_chanctl_comm_data_l |= C_DL_CS5; 1369 break; 1370 1371 case CS6: 1372 sc->sc_chanctl_comm_data_l |= C_DL_CS6; 1373 break; 1374 1375 case CS7: 1376 sc->sc_chanctl_comm_data_l |= C_DL_CS7; 1377 break; 1378 1379 case CS8: 1380 sc->sc_chanctl_comm_data_l |= C_DL_CS8; 1381 break; 1382 } 1383 1384 /* Stop bits. */ 1385 if (t->c_cflag & CSTOPB) { 1386 if ((sc->sc_chanctl_comm_data_l & C_DL_CS) == C_DL_CS5) 1387 sc->sc_chanctl_comm_data_l |= C_DL_15STOP; 1388 else 1389 sc->sc_chanctl_comm_data_l |= C_DL_2STOP; 1390 } else 1391 sc->sc_chanctl_comm_data_l |= C_DL_1STOP; 1392 1393 /* Parity. */ 1394 if (t->c_cflag & PARENB) { 1395 if (t->c_cflag & PARODD) 1396 sc->sc_chanctl_comm_parity = C_PR_ODD; 1397 else 1398 sc->sc_chanctl_comm_parity = C_PR_EVEN; 1399 } else 1400 sc->sc_chanctl_comm_parity = C_PR_NONE; 1401 1402 /* 1403 * Initialize flow control pins depending on the current flow control 1404 * mode. 1405 */ 1406 if (ISSET(t->c_cflag, CRTSCTS)) { 1407 sc->sc_rs_control_dtr = C_RS_DTR; 1408 sc->sc_chanctl_hw_flow = C_RS_CTS | C_RS_RTS; 1409 } else if (ISSET(t->c_cflag, MDMBUF)) { 1410 sc->sc_rs_control_dtr = 0; 1411 sc->sc_chanctl_hw_flow = C_RS_DCD | C_RS_DTR; 1412 } else { 1413 /* 1414 * If no flow control, then always set RTS. This will make 1415 * the other side happy if it mistakenly thinks we're doing 1416 * RTS/CTS flow control. 1417 */ 1418 sc->sc_rs_control_dtr = C_RS_DTR | C_RS_RTS; 1419 sc->sc_chanctl_hw_flow = 0; 1420 if (ISSET(sc->sc_chanctl_rs_control, C_RS_DTR)) 1421 SET(sc->sc_chanctl_rs_control, C_RS_RTS); 1422 else 1423 CLR(sc->sc_chanctl_rs_control, C_RS_RTS); 1424 } 1425 1426 /* Baud rate. */ 1427 sc->sc_chanctl_comm_baud = ospeed; 1428 1429 /* Copy to tty. */ 1430 tp->t_ispeed = 0; 1431 tp->t_ospeed = t->c_ospeed; 1432 tp->t_cflag = t->c_cflag; 1433 1434 /* 1435 * Now load the channel control structure. 1436 */ 1437 1438 cz_wait_pci_doorbell(cz, "czparam"); 1439 1440 CZTTY_CHAN_WRITE(sc, CHNCTL_COMM_BAUD, sc->sc_chanctl_comm_baud); 1441 CZTTY_CHAN_WRITE(sc, CHNCTL_COMM_DATA_L, sc->sc_chanctl_comm_data_l); 1442 CZTTY_CHAN_WRITE(sc, CHNCTL_COMM_PARITY, sc->sc_chanctl_comm_parity); 1443 CZTTY_CHAN_WRITE(sc, CHNCTL_HW_FLOW, sc->sc_chanctl_hw_flow); 1444 CZTTY_CHAN_WRITE(sc, CHNCTL_RS_CONTROL, sc->sc_chanctl_rs_control); 1445 1446 CZ_FWCTL_WRITE(cz, BRDCTL_HCMD_CHANNEL, sc->sc_channel); 1447 CZ_PLX_WRITE(cz, PLX_PCI_LOCAL_DOORBELL, C_CM_IOCTLW); 1448 1449 cz_wait_pci_doorbell(cz, "czparam"); 1450 1451 CZ_FWCTL_WRITE(cz, BRDCTL_HCMD_CHANNEL, sc->sc_channel); 1452 CZ_PLX_WRITE(cz, PLX_PCI_LOCAL_DOORBELL, C_CM_IOCTLM); 1453 1454 cz_wait_pci_doorbell(cz, "czparam"); 1455 1456 /* 1457 * Update the tty layer's idea of the carrier bit, in case we changed 1458 * CLOCAL. We don't hang up here; we only do that by explicit 1459 * request. 1460 */ 1461 rs_status = CZTTY_CHAN_READ(sc, CHNCTL_RS_STATUS); 1462 (void) (*tp->t_linesw->l_modem)(tp, ISSET(rs_status, C_RS_DCD)); 1463 1464 return (0); 1465 } 1466 1467 /* 1468 * czttystart: 1469 * 1470 * Start or restart transmission. 1471 */ 1472 static void 1473 czttystart(struct tty *tp) 1474 { 1475 struct cztty_softc *sc = CZTTY_SOFTC(tp->t_dev); 1476 int s; 1477 1478 s = spltty(); 1479 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1480 goto out; 1481 1482 if (tp->t_outq.c_cc <= tp->t_lowat) { 1483 if (ISSET(tp->t_state, TS_ASLEEP)) { 1484 CLR(tp->t_state, TS_ASLEEP); 1485 wakeup(&tp->t_outq); 1486 } 1487 selwakeup(&tp->t_wsel); 1488 if (tp->t_outq.c_cc == 0) 1489 goto out; 1490 } 1491 1492 cztty_transmit(sc, tp); 1493 out: 1494 splx(s); 1495 } 1496 1497 /* 1498 * czttystop: 1499 * 1500 * Stop output, e.g., for ^S or output flush. 1501 */ 1502 static void 1503 czttystop(struct tty *tp, int flag) 1504 { 1505 1506 /* 1507 * XXX We don't do anything here, yet. Mostly, I don't know 1508 * XXX exactly how this should be implemented on this device. 1509 * XXX We've given a big chunk of data to the MIPS already, 1510 * XXX and I don't know how we request the MIPS to stop sending 1511 * XXX the data. So, punt for now. --thorpej 1512 */ 1513 } 1514 1515 /* 1516 * cztty_diag: 1517 * 1518 * Issue a scheduled diagnostic message. 1519 */ 1520 static void 1521 cztty_diag(void *arg) 1522 { 1523 struct cztty_softc *sc = arg; 1524 struct cz_softc *cz = CZTTY_CZ(sc); 1525 u_int overflows, parity_errors, framing_errors; 1526 int s; 1527 1528 s = spltty(); 1529 1530 overflows = sc->sc_overflows; 1531 sc->sc_overflows = 0; 1532 1533 parity_errors = sc->sc_parity_errors; 1534 sc->sc_parity_errors = 0; 1535 1536 framing_errors = sc->sc_framing_errors; 1537 sc->sc_framing_errors = 0; 1538 1539 sc->sc_errors = 0; 1540 1541 splx(s); 1542 1543 log(LOG_WARNING, 1544 "%s: channel %d: %u overflow%s, %u parity, %u framing error%s\n", 1545 cz->cz_dev.dv_xname, sc->sc_channel, 1546 overflows, overflows == 1 ? "" : "s", 1547 parity_errors, 1548 framing_errors, framing_errors == 1 ? "" : "s"); 1549 } 1550 1551 const struct cdevsw cz_cdevsw = { 1552 czttyopen, czttyclose, czttyread, czttywrite, czttyioctl, 1553 czttystop, czttytty, czttypoll, nommap, ttykqfilter, D_TTY 1554 }; 1555 1556 /* 1557 * tx and rx ring buffer size macros: 1558 * 1559 * The transmitter and receiver both use ring buffers. For each one, there 1560 * is a get (consumer) and a put (producer) offset. The get value is the 1561 * next byte to be read from the ring, and the put is the next one to be 1562 * put into the ring. get == put means the ring is empty. 1563 * 1564 * For each ring, the firmware controls one of (get, put) and this driver 1565 * controls the other. For transmission, this driver updates put to point 1566 * past the valid data, and the firmware moves get as bytes are sent. Likewise 1567 * for receive, the driver controls put, and this driver controls get. 1568 */ 1569 #define TX_MOVEABLE(g, p, s) (((g) > (p)) ? ((g) - (p) - 1) : ((s) - (p))) 1570 #define RX_MOVEABLE(g, p, s) (((g) > (p)) ? ((s) - (g)) : ((p) - (g))) 1571 1572 /* 1573 * cztty_transmit() 1574 * 1575 * Look at the tty for this port and start sending. 1576 */ 1577 static int 1578 cztty_transmit(struct cztty_softc *sc, struct tty *tp) 1579 { 1580 struct cz_softc *cz = CZTTY_CZ(sc); 1581 u_int move, get, put, size, address; 1582 #ifdef HOSTRAMCODE 1583 int error, done = 0; 1584 #else 1585 int done = 0; 1586 #endif 1587 1588 size = CZTTY_BUF_READ(sc, BUFCTL_TX_BUFSIZE); 1589 get = CZTTY_BUF_READ(sc, BUFCTL_TX_GET); 1590 put = CZTTY_BUF_READ(sc, BUFCTL_TX_PUT); 1591 address = CZTTY_BUF_READ(sc, BUFCTL_TX_BUFADDR); 1592 1593 while ((tp->t_outq.c_cc > 0) && ((move = TX_MOVEABLE(get, put, size)))){ 1594 #ifdef HOSTRAMCODE 1595 if (0) { 1596 move = min(tp->t_outq.c_cc, move); 1597 error = q_to_b(&tp->t_outq, 0, move); 1598 if (error != move) { 1599 printf("%s: channel %d: error moving to " 1600 "transmit buf\n", cz->cz_dev.dv_xname, 1601 sc->sc_channel); 1602 move = error; 1603 } 1604 } else { 1605 #endif 1606 move = min(ndqb(&tp->t_outq, 0), move); 1607 bus_space_write_region_1(cz->cz_win_st, cz->cz_win_sh, 1608 address + put, tp->t_outq.c_cf, move); 1609 ndflush(&tp->t_outq, move); 1610 #ifdef HOSTRAMCODE 1611 } 1612 #endif 1613 1614 put = ((put + move) % size); 1615 done = 1; 1616 } 1617 if (done) { 1618 CZTTY_BUF_WRITE(sc, BUFCTL_TX_PUT, put); 1619 } 1620 return (done); 1621 } 1622 1623 static int 1624 cztty_receive(struct cztty_softc *sc, struct tty *tp) 1625 { 1626 struct cz_softc *cz = CZTTY_CZ(sc); 1627 u_int get, put, size, address; 1628 int done = 0, ch; 1629 1630 size = CZTTY_BUF_READ(sc, BUFCTL_RX_BUFSIZE); 1631 get = CZTTY_BUF_READ(sc, BUFCTL_RX_GET); 1632 put = CZTTY_BUF_READ(sc, BUFCTL_RX_PUT); 1633 address = CZTTY_BUF_READ(sc, BUFCTL_RX_BUFADDR); 1634 1635 while ((get != put) && ((tp->t_canq.c_cc + tp->t_rawq.c_cc) < tp->t_hiwat)) { 1636 #ifdef HOSTRAMCODE 1637 if (hostram) 1638 ch = ((char *)fifoaddr)[get]; 1639 } else { 1640 #endif 1641 ch = bus_space_read_1(cz->cz_win_st, cz->cz_win_sh, 1642 address + get); 1643 #ifdef HOSTRAMCODE 1644 } 1645 #endif 1646 (*tp->t_linesw->l_rint)(ch, tp); 1647 get = (get + 1) % size; 1648 done = 1; 1649 } 1650 if (done) { 1651 CZTTY_BUF_WRITE(sc, BUFCTL_RX_GET, get); 1652 } 1653 return (done); 1654 } 1655