cz.c revision 1.58
1 /* $NetBSD: cz.c,v 1.58 2014/03/16 05:20:28 dholland Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 Zembu Labs, Inc. 5 * All rights reserved. 6 * 7 * Authors: Jason R. Thorpe <thorpej (at) zembu.com> 8 * Bill Studenmund <wrstuden (at) 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 1.58 2014/03/16 05:20:28 dholland 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 callout_t 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 device_t 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 callout_t 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(device_t parent, cfdata_t match, void *aux) 265 { 266 struct pci_attach_args *pa = aux; 267 268 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_CYCLADES) { 269 switch (PCI_PRODUCT(pa->pa_id)) { 270 case PCI_PRODUCT_CYCLADES_CYCLOMZ_2: 271 return (1); 272 } 273 } 274 275 return (0); 276 } 277 278 /* 279 * cz_attach: 280 * 281 * A Cyclades-Z board was found; attach it. 282 */ 283 static void 284 cz_attach(device_t parent, device_t self, void *aux) 285 { 286 extern const struct cdevsw cz_cdevsw; /* XXX */ 287 struct cz_softc *cz = device_private(self); 288 struct pci_attach_args *pa = aux; 289 pci_intr_handle_t ih; 290 const char *intrstr = NULL; 291 struct cztty_softc *sc; 292 struct tty *tp; 293 int i; 294 295 aprint_naive(": Multi-port serial controller\n"); 296 aprint_normal(": Cyclades-Z multiport serial\n"); 297 298 cz->cz_dev = self; 299 cz->cz_plx.plx_pc = pa->pa_pc; 300 cz->cz_plx.plx_tag = pa->pa_tag; 301 302 if (pci_mapreg_map(pa, PLX_PCI_RUNTIME_MEMADDR, 303 PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0, 304 &cz->cz_plx.plx_st, &cz->cz_plx.plx_sh, NULL, NULL) != 0) { 305 aprint_error_dev(cz->cz_dev, "unable to map PLX registers\n"); 306 return; 307 } 308 if (pci_mapreg_map(pa, PLX_PCI_LOCAL_ADDR0, 309 PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0, 310 &cz->cz_win_st, &cz->cz_win_sh, NULL, NULL) != 0) { 311 aprint_error_dev(cz->cz_dev, "unable to map device window\n"); 312 return; 313 } 314 315 cz->cz_mailbox0 = CZ_PLX_READ(cz, PLX_MAILBOX0); 316 cz->cz_nopenchan = 0; 317 318 /* 319 * Make sure that the board is completely stopped. 320 */ 321 CZ_WIN_FPGA(cz); 322 CZ_FPGA_WRITE(cz, FPGA_CPU_STOP, 0); 323 324 /* 325 * Load the board's firmware. 326 */ 327 if (cz_load_firmware(cz) != 0) 328 return; 329 330 /* 331 * Now that we're ready to roll, map and establish the interrupt 332 * handler. 333 */ 334 if (pci_intr_map(pa, &ih) != 0) { 335 /* 336 * The common case is for Cyclades-Z boards to run 337 * in polling mode, and thus not have an interrupt 338 * mapped for them. Don't bother reporting that 339 * the interrupt is not mappable, since this isn't 340 * really an error. 341 */ 342 cz->cz_ih = NULL; 343 goto polling_mode; 344 } else { 345 intrstr = pci_intr_string(pa->pa_pc, ih); 346 cz->cz_ih = pci_intr_establish(pa->pa_pc, ih, IPL_TTY, 347 cz_intr, cz); 348 } 349 if (cz->cz_ih == NULL) { 350 aprint_error_dev(cz->cz_dev, "unable to establish interrupt"); 351 if (intrstr != NULL) 352 aprint_error(" at %s", intrstr); 353 aprint_error("\n"); 354 /* We will fall-back on polling mode. */ 355 } else 356 aprint_normal_dev(cz->cz_dev, "interrupting at %s\n", 357 intrstr); 358 359 polling_mode: 360 if (cz->cz_ih == NULL) { 361 callout_init(&cz->cz_callout, 0); 362 if (cz_timeout_ticks == 0) 363 cz_timeout_ticks = max(1, hz * CZ_POLL_MS / 1000); 364 aprint_normal_dev(cz->cz_dev, "polling mode, %d ms interval (%d tick%s)\n", 365 CZ_POLL_MS, cz_timeout_ticks, 366 cz_timeout_ticks == 1 ? "" : "s"); 367 } 368 369 /* 370 * Allocate sufficient pointers for the children and 371 * attach them. Set all ports to a reasonable initial 372 * configuration while we're at it: 373 * 374 * disabled 375 * 8N1 376 * default baud rate 377 * hardware flow control. 378 */ 379 CZ_WIN_RAM(cz); 380 381 if (cz->cz_nchannels == 0) { 382 /* No channels? No more work to do! */ 383 return; 384 } 385 386 cz->cz_ports = malloc(sizeof(struct cztty_softc) * cz->cz_nchannels, 387 M_DEVBUF, M_WAITOK|M_ZERO); 388 cztty_attached_ttys += cz->cz_nchannels; 389 390 for (i = 0; i < cz->cz_nchannels; i++) { 391 sc = &cz->cz_ports[i]; 392 393 sc->sc_channel = i; 394 sc->sc_chan_st = cz->cz_win_st; 395 sc->sc_parent = cz; 396 397 if (bus_space_subregion(cz->cz_win_st, cz->cz_win_sh, 398 cz->cz_fwctl + ZFIRM_CHNCTL_OFF(i, 0), 399 ZFIRM_CHNCTL_SIZE, &sc->sc_chan_sh)) { 400 aprint_error_dev(cz->cz_dev, 401 "unable to subregion channel %d control\n", i); 402 sc->sc_channel = CZTTY_CHANNEL_DEAD; 403 continue; 404 } 405 if (bus_space_subregion(cz->cz_win_st, cz->cz_win_sh, 406 cz->cz_fwctl + ZFIRM_BUFCTL_OFF(i, 0), 407 ZFIRM_BUFCTL_SIZE, &sc->sc_buf_sh)) { 408 aprint_error_dev(cz->cz_dev, 409 "unable to subregion channel %d buffer\n", i); 410 sc->sc_channel = CZTTY_CHANNEL_DEAD; 411 continue; 412 } 413 414 callout_init(&sc->sc_diag_ch, 0); 415 416 tp = tty_alloc(); 417 tp->t_dev = makedev(cdevsw_lookup_major(&cz_cdevsw), 418 (device_unit(cz->cz_dev) * ZFIRM_MAX_CHANNELS) + i); 419 tp->t_oproc = czttystart; 420 tp->t_param = czttyparam; 421 tty_attach(tp); 422 423 sc->sc_tty = tp; 424 425 CZTTY_CHAN_WRITE(sc, CHNCTL_OP_MODE, C_CH_DISABLE); 426 CZTTY_CHAN_WRITE(sc, CHNCTL_INTR_ENABLE, CZ_INTERRUPTS); 427 CZTTY_CHAN_WRITE(sc, CHNCTL_SW_FLOW, 0); 428 CZTTY_CHAN_WRITE(sc, CHNCTL_FLOW_XON, 0x11); 429 CZTTY_CHAN_WRITE(sc, CHNCTL_FLOW_XOFF, 0x13); 430 CZTTY_CHAN_WRITE(sc, CHNCTL_COMM_BAUD, TTYDEF_SPEED); 431 CZTTY_CHAN_WRITE(sc, CHNCTL_COMM_PARITY, C_PR_NONE); 432 CZTTY_CHAN_WRITE(sc, CHNCTL_COMM_DATA_L, C_DL_CS8 | C_DL_1STOP); 433 CZTTY_CHAN_WRITE(sc, CHNCTL_COMM_FLAGS, 0); 434 CZTTY_CHAN_WRITE(sc, CHNCTL_HW_FLOW, C_RS_CTS | C_RS_RTS); 435 CZTTY_CHAN_WRITE(sc, CHNCTL_RS_CONTROL, 0); 436 } 437 } 438 439 CFATTACH_DECL_NEW(cz, sizeof(struct cz_softc), 440 cz_match, cz_attach, NULL, NULL); 441 442 #if 0 443 /* 444 * cz_reset_board: 445 * 446 * Reset the board via the PLX. 447 */ 448 static void 449 cz_reset_board(struct cz_softc *cz) 450 { 451 u_int32_t reg; 452 453 reg = CZ_PLX_READ(cz, PLX_CONTROL); 454 CZ_PLX_WRITE(cz, PLX_CONTROL, reg | CONTROL_SWR); 455 delay(1000); 456 457 CZ_PLX_WRITE(cz, PLX_CONTROL, reg); 458 delay(1000); 459 460 /* Now reload the PLX from its EEPROM. */ 461 reg = CZ_PLX_READ(cz, PLX_CONTROL); 462 CZ_PLX_WRITE(cz, PLX_CONTROL, reg | CONTROL_RELOADCFG); 463 delay(1000); 464 CZ_PLX_WRITE(cz, PLX_CONTROL, reg); 465 } 466 #endif 467 468 /* 469 * cz_load_firmware: 470 * 471 * Load the ZFIRM firmware into the board's RAM and start it 472 * running. 473 */ 474 static int 475 cz_load_firmware(struct cz_softc *cz) 476 { 477 const struct zfirm_header *zfh; 478 const struct zfirm_config *zfc; 479 const struct zfirm_block *zfb, *zblocks; 480 const u_int8_t *cp; 481 const char *board; 482 u_int32_t fid; 483 int i, j, nconfigs, nblocks, nbytes; 484 485 zfh = (const struct zfirm_header *) cycladesz_firmware; 486 487 /* Find the config header. */ 488 if (le32toh(zfh->zfh_configoff) & (sizeof(u_int32_t) - 1)) { 489 aprint_error_dev(cz->cz_dev, "bad ZFIRM config offset: 0x%x\n", 490 le32toh(zfh->zfh_configoff)); 491 return (EIO); 492 } 493 zfc = (const struct zfirm_config *)(cycladesz_firmware + 494 le32toh(zfh->zfh_configoff)); 495 nconfigs = le32toh(zfh->zfh_nconfig); 496 497 /* Locate the correct configuration for our board. */ 498 for (i = 0; i < nconfigs; i++, zfc++) { 499 if (le32toh(zfc->zfc_mailbox) == cz->cz_mailbox0 && 500 le32toh(zfc->zfc_function) == ZFC_FUNCTION_NORMAL) 501 break; 502 } 503 if (i == nconfigs) { 504 aprint_error_dev(cz->cz_dev, "unable to locate config header\n"); 505 return (EIO); 506 } 507 508 nblocks = le32toh(zfc->zfc_nblocks); 509 zblocks = (const struct zfirm_block *)(cycladesz_firmware + 510 le32toh(zfh->zfh_blockoff)); 511 512 /* 513 * 8Zo ver. 1 doesn't have an FPGA. Load it on all others if 514 * necessary. 515 */ 516 if (cz->cz_mailbox0 != MAILBOX0_8Zo_V1 517 #if 0 518 && ((CZ_PLX_READ(cz, PLX_CONTROL) & CONTROL_FPGA_LOADED) == 0) 519 #endif 520 ) { 521 #ifdef CZ_DEBUG 522 aprint_debug_dev(cz->cz_dev, "Loading FPGA..."); 523 #endif 524 CZ_WIN_FPGA(cz); 525 for (i = 0; i < nblocks; i++) { 526 /* zfb = zblocks + le32toh(zfc->zfc_blocklist[i]) ?? */ 527 zfb = &zblocks[le32toh(zfc->zfc_blocklist[i])]; 528 if (le32toh(zfb->zfb_type) == ZFB_TYPE_FPGA) { 529 nbytes = le32toh(zfb->zfb_size); 530 cp = &cycladesz_firmware[ 531 le32toh(zfb->zfb_fileoff)]; 532 for (j = 0; j < nbytes; j++, cp++) { 533 bus_space_write_1(cz->cz_win_st, 534 cz->cz_win_sh, 0, *cp); 535 /* FPGA needs 30-100us to settle. */ 536 delay(10); 537 } 538 } 539 } 540 #ifdef CZ_DEBUG 541 aprint_debug("done\n"); 542 #endif 543 } 544 545 /* Now load the firmware. */ 546 CZ_WIN_RAM(cz); 547 548 for (i = 0; i < nblocks; i++) { 549 /* zfb = zblocks + le32toh(zfc->zfc_blocklist[i]) ?? */ 550 zfb = &zblocks[le32toh(zfc->zfc_blocklist[i])]; 551 if (le32toh(zfb->zfb_type) == ZFB_TYPE_FIRMWARE) { 552 const u_int32_t *lp; 553 u_int32_t ro = le32toh(zfb->zfb_ramoff); 554 nbytes = le32toh(zfb->zfb_size); 555 lp = (const u_int32_t *) 556 &cycladesz_firmware[le32toh(zfb->zfb_fileoff)]; 557 for (j = 0; j < nbytes; j += 4, lp++) { 558 bus_space_write_4(cz->cz_win_st, cz->cz_win_sh, 559 ro + j, le32toh(*lp)); 560 delay(10); 561 } 562 } 563 } 564 565 /* Now restart the MIPS. */ 566 CZ_WIN_FPGA(cz); 567 CZ_FPGA_WRITE(cz, FPGA_CPU_START, 0); 568 569 /* Wait for the MIPS to start, then report the results. */ 570 CZ_WIN_RAM(cz); 571 572 #ifdef CZ_DEBUG 573 aprint_debug_dev(cz->cz_dev, "waiting for MIPS to start"); 574 #endif 575 for (i = 0; i < 100; i++) { 576 fid = bus_space_read_4(cz->cz_win_st, cz->cz_win_sh, 577 ZFIRM_SIG_OFF); 578 if (fid == ZFIRM_SIG) { 579 /* MIPS has booted. */ 580 break; 581 } else if (fid == ZFIRM_HLT) { 582 /* 583 * The MIPS has halted, usually due to a power 584 * shortage on the expansion module. 585 */ 586 aprint_error_dev(cz->cz_dev, "MIPS halted; possible power supply " 587 "problem\n"); 588 return (EIO); 589 } else { 590 #ifdef CZ_DEBUG 591 if ((i % 8) == 0) 592 aprint_debug("."); 593 #endif 594 delay(250000); 595 } 596 } 597 #ifdef CZ_DEBUG 598 aprint_debug("\n"); 599 #endif 600 if (i == 100) { 601 CZ_WIN_FPGA(cz); 602 aprint_error_dev(cz->cz_dev, 603 "MIPS failed to start; wanted 0x%08x got 0x%08x\n", 604 ZFIRM_SIG, fid); 605 aprint_error_dev(cz->cz_dev, "FPGA ID 0x%08x, FPGA version 0x%08x\n", 606 CZ_FPGA_READ(cz, FPGA_ID), 607 CZ_FPGA_READ(cz, FPGA_VERSION)); 608 return (EIO); 609 } 610 611 /* 612 * Locate the firmware control structures. 613 */ 614 cz->cz_fwctl = bus_space_read_4(cz->cz_win_st, cz->cz_win_sh, 615 ZFIRM_CTRLADDR_OFF); 616 #ifdef CZ_DEBUG 617 aprint_debug_dev(cz->cz_dev, "FWCTL structure at offset " 618 "%#08" PRIxPADDR "\n", cz->cz_fwctl); 619 #endif 620 621 CZ_FWCTL_WRITE(cz, BRDCTL_C_OS, C_OS_BSD); 622 CZ_FWCTL_WRITE(cz, BRDCTL_DRVERSION, CZ_DRIVER_VERSION); 623 624 cz->cz_nchannels = CZ_FWCTL_READ(cz, BRDCTL_NCHANNEL); 625 626 switch (cz->cz_mailbox0) { 627 case MAILBOX0_8Zo_V1: 628 board = "Cyclades-8Zo ver. 1"; 629 break; 630 631 case MAILBOX0_8Zo_V2: 632 board = "Cyclades-8Zo ver. 2"; 633 break; 634 635 case MAILBOX0_Ze_V1: 636 board = "Cyclades-Ze"; 637 break; 638 639 default: 640 board = "unknown Cyclades Z-series"; 641 break; 642 } 643 644 fid = CZ_FWCTL_READ(cz, BRDCTL_FWVERSION); 645 aprint_normal_dev(cz->cz_dev, "%s, ", board); 646 if (cz->cz_nchannels == 0) 647 aprint_normal("no channels attached, "); 648 else 649 aprint_normal("%d channels (ttyCZ%04d..ttyCZ%04d), ", 650 cz->cz_nchannels, cztty_attached_ttys, 651 cztty_attached_ttys + (cz->cz_nchannels - 1)); 652 aprint_normal("firmware %x.%x.%x\n", 653 (fid >> 8) & 0xf, (fid >> 4) & 0xf, fid & 0xf); 654 655 return (0); 656 } 657 658 /* 659 * cz_poll: 660 * 661 * This card doesn't do interrupts, so scan it for activity every CZ_POLL_MS 662 * ms. 663 */ 664 static void 665 cz_poll(void *arg) 666 { 667 int s = spltty(); 668 struct cz_softc *cz = arg; 669 670 cz_intr(cz); 671 callout_reset(&cz->cz_callout, cz_timeout_ticks, cz_poll, cz); 672 673 splx(s); 674 } 675 676 /* 677 * cz_intr: 678 * 679 * Interrupt service routine. 680 * 681 * We either are receiving an interrupt directly from the board, or we are 682 * in polling mode and it's time to poll. 683 */ 684 static int 685 cz_intr(void *arg) 686 { 687 int rval = 0; 688 u_int command, channel; 689 struct cz_softc *cz = arg; 690 struct cztty_softc *sc; 691 struct tty *tp; 692 693 while ((command = (CZ_PLX_READ(cz, PLX_LOCAL_PCI_DOORBELL) & 0xff))) { 694 rval = 1; 695 channel = CZ_FWCTL_READ(cz, BRDCTL_FWCMD_CHANNEL); 696 /* XXX - is this needed? */ 697 (void)CZ_FWCTL_READ(cz, BRDCTL_FWCMD_PARAM); 698 699 /* now clear this interrupt, posslibly enabling another */ 700 CZ_PLX_WRITE(cz, PLX_LOCAL_PCI_DOORBELL, command); 701 702 if (cz->cz_ports == NULL) { 703 #ifdef CZ_DEBUG 704 printf("%s: interrupt on channel %d, but no channels\n", 705 device_xname(cz->cz_dev), channel); 706 #endif 707 continue; 708 } 709 710 sc = &cz->cz_ports[channel]; 711 712 if (sc->sc_channel == CZTTY_CHANNEL_DEAD) 713 break; 714 715 tp = sc->sc_tty; 716 717 switch (command) { 718 case C_CM_TXFEMPTY: /* transmit cases */ 719 case C_CM_TXBEMPTY: 720 case C_CM_TXLOWWM: 721 case C_CM_INTBACK: 722 if (!ISSET(tp->t_state, TS_ISOPEN)) { 723 #ifdef CZ_DEBUG 724 printf("%s: tx intr on closed channel %d\n", 725 device_xname(cz->cz_dev), channel); 726 #endif 727 break; 728 } 729 730 if (cztty_transmit(sc, tp)) { 731 /* 732 * Do wakeup stuff here. 733 */ 734 mutex_spin_enter(&tty_lock); /* XXX */ 735 ttwakeup(tp); 736 mutex_spin_exit(&tty_lock); /* XXX */ 737 wakeup(tp); 738 } 739 break; 740 741 case C_CM_RXNNDT: /* receive cases */ 742 case C_CM_RXHIWM: 743 case C_CM_INTBACK2: /* from restart ?? */ 744 #if 0 745 case C_CM_ICHAR: 746 #endif 747 if (!ISSET(tp->t_state, TS_ISOPEN)) { 748 CZTTY_BUF_WRITE(sc, BUFCTL_RX_GET, 749 CZTTY_BUF_READ(sc, BUFCTL_RX_PUT)); 750 break; 751 } 752 753 if (cztty_receive(sc, tp)) { 754 /* 755 * Do wakeup stuff here. 756 */ 757 mutex_spin_enter(&tty_lock); /* XXX */ 758 ttwakeup(tp); 759 mutex_spin_exit(&tty_lock); /* XXX */ 760 wakeup(tp); 761 } 762 break; 763 764 case C_CM_MDCD: 765 if (!ISSET(tp->t_state, TS_ISOPEN)) 766 break; 767 768 (void) (*tp->t_linesw->l_modem)(tp, 769 ISSET(C_RS_DCD, CZTTY_CHAN_READ(sc, 770 CHNCTL_RS_STATUS))); 771 break; 772 773 case C_CM_MDSR: 774 case C_CM_MRI: 775 case C_CM_MCTS: 776 case C_CM_MRTS: 777 break; 778 779 case C_CM_IOCTLW: 780 break; 781 782 case C_CM_PR_ERROR: 783 sc->sc_parity_errors++; 784 goto error_common; 785 786 case C_CM_FR_ERROR: 787 sc->sc_framing_errors++; 788 goto error_common; 789 790 case C_CM_OVR_ERROR: 791 sc->sc_overflows++; 792 error_common: 793 if (sc->sc_errors++ == 0) 794 callout_reset(&sc->sc_diag_ch, 60 * hz, 795 cztty_diag, sc); 796 break; 797 798 case C_CM_RXBRK: 799 if (!ISSET(tp->t_state, TS_ISOPEN)) 800 break; 801 802 /* 803 * A break is a \000 character with TTY_FE error 804 * flags set. So TTY_FE by itself works. 805 */ 806 (*tp->t_linesw->l_rint)(TTY_FE, tp); 807 mutex_spin_enter(&tty_lock); /* XXX */ 808 ttwakeup(tp); 809 mutex_spin_exit(&tty_lock); /* XXX */ 810 wakeup(tp); 811 break; 812 813 default: 814 #ifdef CZ_DEBUG 815 printf("%s: channel %d: Unknown interrupt 0x%x\n", 816 device_xname(cz->cz_dev), sc->sc_channel, command); 817 #endif 818 break; 819 } 820 } 821 822 return (rval); 823 } 824 825 /* 826 * cz_wait_pci_doorbell: 827 * 828 * Wait for the pci doorbell to be clear - wait for pending 829 * activity to drain. 830 */ 831 static int 832 cz_wait_pci_doorbell(struct cz_softc *cz, const char *wstring) 833 { 834 int error; 835 836 while (CZ_PLX_READ(cz, PLX_PCI_LOCAL_DOORBELL)) { 837 error = tsleep(cz, TTIPRI | PCATCH, wstring, max(1, hz/100)); 838 if ((error != 0) && (error != EWOULDBLOCK)) 839 return (error); 840 } 841 return (0); 842 } 843 844 /***************************************************************************** 845 * Cyclades-Z TTY code starts here... 846 *****************************************************************************/ 847 848 #define CZTTYDIALOUT_MASK 0x80000 849 850 #define CZTTY_DIALOUT(dev) (minor((dev)) & CZTTYDIALOUT_MASK) 851 #define CZTTY_CZ(sc) ((sc)->sc_parent) 852 853 #define CZTTY_SOFTC(dev) cztty_getttysoftc(dev) 854 855 static struct cztty_softc * 856 cztty_getttysoftc(dev_t dev) 857 { 858 int i, j, k = 0, u = minor(dev) & ~CZTTYDIALOUT_MASK; 859 struct cz_softc *cz = NULL; 860 861 for (i = 0, j = 0; i < cz_cd.cd_ndevs; i++) { 862 k = j; 863 cz = device_lookup_private(&cz_cd, i); 864 if (cz == NULL) 865 continue; 866 if (cz->cz_ports == NULL) 867 continue; 868 j += cz->cz_nchannels; 869 if (j > u) 870 break; 871 } 872 873 if (i >= cz_cd.cd_ndevs) 874 return (NULL); 875 else 876 return (&cz->cz_ports[u - k]); 877 } 878 879 /* 880 * czttytty: 881 * 882 * Return a pointer to our tty. 883 */ 884 static struct tty * 885 czttytty(dev_t dev) 886 { 887 struct cztty_softc *sc = CZTTY_SOFTC(dev); 888 889 #ifdef DIAGNOSTIC 890 if (sc == NULL) 891 panic("czttytty"); 892 #endif 893 894 return (sc->sc_tty); 895 } 896 897 /* 898 * cztty_shutdown: 899 * 900 * Shut down a port. 901 */ 902 static void 903 cztty_shutdown(struct cztty_softc *sc) 904 { 905 struct cz_softc *cz = CZTTY_CZ(sc); 906 struct tty *tp = sc->sc_tty; 907 int s; 908 909 s = spltty(); 910 911 /* Clear any break condition set with TIOCSBRK. */ 912 cztty_break(sc, 0); 913 914 /* 915 * Hang up if necessary. Wait a bit, so the other side has time to 916 * notice even if we immediately open the port again. 917 */ 918 if (ISSET(tp->t_cflag, HUPCL)) { 919 cztty_modem(sc, 0); 920 (void) tsleep(tp, TTIPRI, ttclos, hz); 921 } 922 923 /* Disable the channel. */ 924 cz_wait_pci_doorbell(cz, "czdis"); 925 CZTTY_CHAN_WRITE(sc, CHNCTL_OP_MODE, C_CH_DISABLE); 926 CZ_FWCTL_WRITE(cz, BRDCTL_HCMD_CHANNEL, sc->sc_channel); 927 CZ_PLX_WRITE(cz, PLX_PCI_LOCAL_DOORBELL, C_CM_IOCTL); 928 929 if ((--cz->cz_nopenchan == 0) && (cz->cz_ih == NULL)) { 930 #ifdef CZ_DEBUG 931 printf("%s: Disabling polling\n", device_xname(cz->cz_dev)); 932 #endif 933 callout_stop(&cz->cz_callout); 934 } 935 936 splx(s); 937 } 938 939 /* 940 * czttyopen: 941 * 942 * Open a Cyclades-Z serial port. 943 */ 944 static int 945 czttyopen(dev_t dev, int flags, int mode, struct lwp *l) 946 { 947 struct cztty_softc *sc = CZTTY_SOFTC(dev); 948 struct cz_softc *cz; 949 struct tty *tp; 950 int s, error; 951 952 if (sc == NULL) 953 return (ENXIO); 954 955 if (sc->sc_channel == CZTTY_CHANNEL_DEAD) 956 return (ENXIO); 957 958 cz = CZTTY_CZ(sc); 959 tp = sc->sc_tty; 960 961 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 962 return (EBUSY); 963 964 s = spltty(); 965 966 /* 967 * Do the following iff this is a first open. 968 */ 969 if (!ISSET(tp->t_state, TS_ISOPEN) && (tp->t_wopen == 0)) { 970 struct termios t; 971 972 tp->t_dev = dev; 973 974 /* If we're turning things on, enable interrupts */ 975 if ((cz->cz_nopenchan++ == 0) && (cz->cz_ih == NULL)) { 976 #ifdef CZ_DEBUG 977 printf("%s: Enabling polling.\n", 978 device_xname(cz->cz_dev)); 979 #endif 980 callout_reset(&cz->cz_callout, cz_timeout_ticks, 981 cz_poll, cz); 982 } 983 984 /* 985 * Enable the channel. Don't actually ring the 986 * doorbell here; czttyparam() will do it for us. 987 */ 988 cz_wait_pci_doorbell(cz, "czopen"); 989 990 CZTTY_CHAN_WRITE(sc, CHNCTL_OP_MODE, C_CH_ENABLE); 991 992 /* 993 * Initialize the termios status to the defaults. Add in the 994 * sticky bits from TIOCSFLAGS. 995 */ 996 t.c_ispeed = 0; 997 t.c_ospeed = TTYDEF_SPEED; 998 t.c_cflag = TTYDEF_CFLAG; 999 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 1000 SET(t.c_cflag, CLOCAL); 1001 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 1002 SET(t.c_cflag, CRTSCTS); 1003 1004 /* 1005 * Reset the input and output rings. Do this before 1006 * we call czttyparam(), as that function enables 1007 * the channel. 1008 */ 1009 CZTTY_BUF_WRITE(sc, BUFCTL_RX_GET, 1010 CZTTY_BUF_READ(sc, BUFCTL_RX_PUT)); 1011 CZTTY_BUF_WRITE(sc, BUFCTL_TX_PUT, 1012 CZTTY_BUF_READ(sc, BUFCTL_TX_GET)); 1013 1014 /* Make sure czttyparam() will see changes. */ 1015 tp->t_ospeed = 0; 1016 (void) czttyparam(tp, &t); 1017 tp->t_iflag = TTYDEF_IFLAG; 1018 tp->t_oflag = TTYDEF_OFLAG; 1019 tp->t_lflag = TTYDEF_LFLAG; 1020 ttychars(tp); 1021 ttsetwater(tp); 1022 1023 /* 1024 * Turn on DTR. We must always do this, even if carrier is not 1025 * present, because otherwise we'd have to use TIOCSDTR 1026 * immediately after setting CLOCAL, which applications do not 1027 * expect. We always assert DTR while the device is open 1028 * unless explicitly requested to deassert it. 1029 */ 1030 cztty_modem(sc, 1); 1031 } 1032 1033 splx(s); 1034 1035 error = ttyopen(tp, CZTTY_DIALOUT(dev), ISSET(flags, O_NONBLOCK)); 1036 if (error) 1037 goto bad; 1038 1039 error = (*tp->t_linesw->l_open)(dev, tp); 1040 if (error) 1041 goto bad; 1042 1043 return (0); 1044 1045 bad: 1046 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 1047 /* 1048 * We failed to open the device, and nobody else had it opened. 1049 * Clean up the state as appropriate. 1050 */ 1051 cztty_shutdown(sc); 1052 } 1053 1054 return (error); 1055 } 1056 1057 /* 1058 * czttyclose: 1059 * 1060 * Close a Cyclades-Z serial port. 1061 */ 1062 static int 1063 czttyclose(dev_t dev, int flags, int mode, struct lwp *l) 1064 { 1065 struct cztty_softc *sc = CZTTY_SOFTC(dev); 1066 struct tty *tp = sc->sc_tty; 1067 1068 /* XXX This is for cons.c. */ 1069 if (!ISSET(tp->t_state, TS_ISOPEN)) 1070 return (0); 1071 1072 (*tp->t_linesw->l_close)(tp, flags); 1073 ttyclose(tp); 1074 1075 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 1076 /* 1077 * Although we got a last close, the device may still be in 1078 * use; e.g. if this was the dialout node, and there are still 1079 * processes waiting for carrier on the non-dialout node. 1080 */ 1081 cztty_shutdown(sc); 1082 } 1083 1084 return (0); 1085 } 1086 1087 /* 1088 * czttyread: 1089 * 1090 * Read from a Cyclades-Z serial port. 1091 */ 1092 static int 1093 czttyread(dev_t dev, struct uio *uio, int flags) 1094 { 1095 struct cztty_softc *sc = CZTTY_SOFTC(dev); 1096 struct tty *tp = sc->sc_tty; 1097 1098 return ((*tp->t_linesw->l_read)(tp, uio, flags)); 1099 } 1100 1101 /* 1102 * czttywrite: 1103 * 1104 * Write to a Cyclades-Z serial port. 1105 */ 1106 static int 1107 czttywrite(dev_t dev, struct uio *uio, int flags) 1108 { 1109 struct cztty_softc *sc = CZTTY_SOFTC(dev); 1110 struct tty *tp = sc->sc_tty; 1111 1112 return ((*tp->t_linesw->l_write)(tp, uio, flags)); 1113 } 1114 1115 /* 1116 * czttypoll: 1117 * 1118 * Poll a Cyclades-Z serial port. 1119 */ 1120 static int 1121 czttypoll(dev_t dev, int events, struct lwp *l) 1122 { 1123 struct cztty_softc *sc = CZTTY_SOFTC(dev); 1124 struct tty *tp = sc->sc_tty; 1125 1126 return ((*tp->t_linesw->l_poll)(tp, events, l)); 1127 } 1128 1129 /* 1130 * czttyioctl: 1131 * 1132 * Perform a control operation on a Cyclades-Z serial port. 1133 */ 1134 static int 1135 czttyioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 1136 { 1137 struct cztty_softc *sc = CZTTY_SOFTC(dev); 1138 struct tty *tp = sc->sc_tty; 1139 int s, error; 1140 1141 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 1142 if (error != EPASSTHROUGH) 1143 return (error); 1144 1145 error = ttioctl(tp, cmd, data, flag, l); 1146 if (error != EPASSTHROUGH) 1147 return (error); 1148 1149 error = 0; 1150 1151 s = spltty(); 1152 1153 switch (cmd) { 1154 case TIOCSBRK: 1155 cztty_break(sc, 1); 1156 break; 1157 1158 case TIOCCBRK: 1159 cztty_break(sc, 0); 1160 break; 1161 1162 case TIOCGFLAGS: 1163 *(int *)data = sc->sc_swflags; 1164 break; 1165 1166 case TIOCSFLAGS: 1167 error = kauth_authorize_device_tty(l->l_cred, 1168 KAUTH_DEVICE_TTY_PRIVSET, tp); 1169 if (error) 1170 break; 1171 sc->sc_swflags = *(int *)data; 1172 break; 1173 1174 case TIOCSDTR: 1175 cztty_modem(sc, 1); 1176 break; 1177 1178 case TIOCCDTR: 1179 cztty_modem(sc, 0); 1180 break; 1181 1182 case TIOCMSET: 1183 case TIOCMBIS: 1184 case TIOCMBIC: 1185 tiocm_to_cztty(sc, cmd, *(int *)data); 1186 break; 1187 1188 case TIOCMGET: 1189 *(int *)data = cztty_to_tiocm(sc); 1190 break; 1191 1192 default: 1193 error = EPASSTHROUGH; 1194 break; 1195 } 1196 1197 splx(s); 1198 1199 return (error); 1200 } 1201 1202 /* 1203 * cztty_break: 1204 * 1205 * Set or clear BREAK on a port. 1206 */ 1207 static void 1208 cztty_break(struct cztty_softc *sc, int onoff) 1209 { 1210 struct cz_softc *cz = CZTTY_CZ(sc); 1211 1212 cz_wait_pci_doorbell(cz, "czbreak"); 1213 1214 CZ_FWCTL_WRITE(cz, BRDCTL_HCMD_CHANNEL, sc->sc_channel); 1215 CZ_PLX_WRITE(cz, PLX_PCI_LOCAL_DOORBELL, 1216 onoff ? C_CM_SET_BREAK : C_CM_CLR_BREAK); 1217 } 1218 1219 /* 1220 * cztty_modem: 1221 * 1222 * Set or clear DTR on a port. 1223 */ 1224 static void 1225 cztty_modem(struct cztty_softc *sc, int onoff) 1226 { 1227 struct cz_softc *cz = CZTTY_CZ(sc); 1228 1229 if (sc->sc_rs_control_dtr == 0) 1230 return; 1231 1232 cz_wait_pci_doorbell(cz, "czmod"); 1233 1234 if (onoff) 1235 sc->sc_chanctl_rs_control |= sc->sc_rs_control_dtr; 1236 else 1237 sc->sc_chanctl_rs_control &= ~sc->sc_rs_control_dtr; 1238 CZTTY_CHAN_WRITE(sc, CHNCTL_RS_CONTROL, sc->sc_chanctl_rs_control); 1239 1240 CZ_FWCTL_WRITE(cz, BRDCTL_HCMD_CHANNEL, sc->sc_channel); 1241 CZ_PLX_WRITE(cz, PLX_PCI_LOCAL_DOORBELL, C_CM_IOCTLM); 1242 } 1243 1244 /* 1245 * tiocm_to_cztty: 1246 * 1247 * Process TIOCM* ioctls. 1248 */ 1249 static void 1250 tiocm_to_cztty(struct cztty_softc *sc, u_long how, int ttybits) 1251 { 1252 struct cz_softc *cz = CZTTY_CZ(sc); 1253 u_int32_t czttybits; 1254 1255 czttybits = 0; 1256 if (ISSET(ttybits, TIOCM_DTR)) 1257 SET(czttybits, C_RS_DTR); 1258 if (ISSET(ttybits, TIOCM_RTS)) 1259 SET(czttybits, C_RS_RTS); 1260 1261 cz_wait_pci_doorbell(cz, "cztiocm"); 1262 1263 switch (how) { 1264 case TIOCMBIC: 1265 CLR(sc->sc_chanctl_rs_control, czttybits); 1266 break; 1267 1268 case TIOCMBIS: 1269 SET(sc->sc_chanctl_rs_control, czttybits); 1270 break; 1271 1272 case TIOCMSET: 1273 CLR(sc->sc_chanctl_rs_control, C_RS_DTR | C_RS_RTS); 1274 SET(sc->sc_chanctl_rs_control, czttybits); 1275 break; 1276 } 1277 1278 CZTTY_CHAN_WRITE(sc, CHNCTL_RS_CONTROL, sc->sc_chanctl_rs_control); 1279 1280 CZ_FWCTL_WRITE(cz, BRDCTL_HCMD_CHANNEL, sc->sc_channel); 1281 CZ_PLX_WRITE(cz, PLX_PCI_LOCAL_DOORBELL, C_CM_IOCTLM); 1282 } 1283 1284 /* 1285 * cztty_to_tiocm: 1286 * 1287 * Process the TIOCMGET ioctl. 1288 */ 1289 static int 1290 cztty_to_tiocm(struct cztty_softc *sc) 1291 { 1292 struct cz_softc *cz = CZTTY_CZ(sc); 1293 u_int32_t rs_status, op_mode; 1294 int ttybits = 0; 1295 1296 cz_wait_pci_doorbell(cz, "cztty"); 1297 1298 rs_status = CZTTY_CHAN_READ(sc, CHNCTL_RS_STATUS); 1299 op_mode = CZTTY_CHAN_READ(sc, CHNCTL_OP_MODE); 1300 1301 if (ISSET(rs_status, C_RS_RTS)) 1302 SET(ttybits, TIOCM_RTS); 1303 if (ISSET(rs_status, C_RS_CTS)) 1304 SET(ttybits, TIOCM_CTS); 1305 if (ISSET(rs_status, C_RS_DCD)) 1306 SET(ttybits, TIOCM_CAR); 1307 if (ISSET(rs_status, C_RS_DTR)) 1308 SET(ttybits, TIOCM_DTR); 1309 if (ISSET(rs_status, C_RS_RI)) 1310 SET(ttybits, TIOCM_RNG); 1311 if (ISSET(rs_status, C_RS_DSR)) 1312 SET(ttybits, TIOCM_DSR); 1313 1314 if (ISSET(op_mode, C_CH_ENABLE)) 1315 SET(ttybits, TIOCM_LE); 1316 1317 return (ttybits); 1318 } 1319 1320 /* 1321 * czttyparam: 1322 * 1323 * Set Cyclades-Z serial port parameters from termios. 1324 * 1325 * XXX Should just copy the whole termios after making 1326 * XXX sure all the changes could be done. 1327 */ 1328 static int 1329 czttyparam(struct tty *tp, struct termios *t) 1330 { 1331 struct cztty_softc *sc = CZTTY_SOFTC(tp->t_dev); 1332 struct cz_softc *cz = CZTTY_CZ(sc); 1333 u_int32_t rs_status; 1334 int ospeed, cflag; 1335 1336 ospeed = t->c_ospeed; 1337 cflag = t->c_cflag; 1338 1339 /* Check requested parameters. */ 1340 if (ospeed < 0) 1341 return (EINVAL); 1342 if (t->c_ispeed && t->c_ispeed != ospeed) 1343 return (EINVAL); 1344 1345 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 1346 SET(cflag, CLOCAL); 1347 CLR(cflag, HUPCL); 1348 } 1349 1350 /* 1351 * If there were no changes, don't do anything. This avoids dropping 1352 * input and improves performance when all we did was frob things like 1353 * VMIN and VTIME. 1354 */ 1355 if (tp->t_ospeed == ospeed && 1356 tp->t_cflag == cflag) 1357 return (0); 1358 1359 /* Data bits. */ 1360 sc->sc_chanctl_comm_data_l = 0; 1361 switch (t->c_cflag & CSIZE) { 1362 case CS5: 1363 sc->sc_chanctl_comm_data_l |= C_DL_CS5; 1364 break; 1365 1366 case CS6: 1367 sc->sc_chanctl_comm_data_l |= C_DL_CS6; 1368 break; 1369 1370 case CS7: 1371 sc->sc_chanctl_comm_data_l |= C_DL_CS7; 1372 break; 1373 1374 case CS8: 1375 sc->sc_chanctl_comm_data_l |= C_DL_CS8; 1376 break; 1377 } 1378 1379 /* Stop bits. */ 1380 if (t->c_cflag & CSTOPB) { 1381 if ((sc->sc_chanctl_comm_data_l & C_DL_CS) == C_DL_CS5) 1382 sc->sc_chanctl_comm_data_l |= C_DL_15STOP; 1383 else 1384 sc->sc_chanctl_comm_data_l |= C_DL_2STOP; 1385 } else 1386 sc->sc_chanctl_comm_data_l |= C_DL_1STOP; 1387 1388 /* Parity. */ 1389 if (t->c_cflag & PARENB) { 1390 if (t->c_cflag & PARODD) 1391 sc->sc_chanctl_comm_parity = C_PR_ODD; 1392 else 1393 sc->sc_chanctl_comm_parity = C_PR_EVEN; 1394 } else 1395 sc->sc_chanctl_comm_parity = C_PR_NONE; 1396 1397 /* 1398 * Initialize flow control pins depending on the current flow control 1399 * mode. 1400 */ 1401 if (ISSET(t->c_cflag, CRTSCTS)) { 1402 sc->sc_rs_control_dtr = C_RS_DTR; 1403 sc->sc_chanctl_hw_flow = C_RS_CTS | C_RS_RTS; 1404 } else if (ISSET(t->c_cflag, MDMBUF)) { 1405 sc->sc_rs_control_dtr = 0; 1406 sc->sc_chanctl_hw_flow = C_RS_DCD | C_RS_DTR; 1407 } else { 1408 /* 1409 * If no flow control, then always set RTS. This will make 1410 * the other side happy if it mistakenly thinks we're doing 1411 * RTS/CTS flow control. 1412 */ 1413 sc->sc_rs_control_dtr = C_RS_DTR | C_RS_RTS; 1414 sc->sc_chanctl_hw_flow = 0; 1415 if (ISSET(sc->sc_chanctl_rs_control, C_RS_DTR)) 1416 SET(sc->sc_chanctl_rs_control, C_RS_RTS); 1417 else 1418 CLR(sc->sc_chanctl_rs_control, C_RS_RTS); 1419 } 1420 1421 /* Baud rate. */ 1422 sc->sc_chanctl_comm_baud = ospeed; 1423 1424 /* Copy to tty. */ 1425 tp->t_ispeed = 0; 1426 tp->t_ospeed = t->c_ospeed; 1427 tp->t_cflag = t->c_cflag; 1428 1429 /* 1430 * Now load the channel control structure. 1431 */ 1432 1433 cz_wait_pci_doorbell(cz, "czparam"); 1434 1435 CZTTY_CHAN_WRITE(sc, CHNCTL_COMM_BAUD, sc->sc_chanctl_comm_baud); 1436 CZTTY_CHAN_WRITE(sc, CHNCTL_COMM_DATA_L, sc->sc_chanctl_comm_data_l); 1437 CZTTY_CHAN_WRITE(sc, CHNCTL_COMM_PARITY, sc->sc_chanctl_comm_parity); 1438 CZTTY_CHAN_WRITE(sc, CHNCTL_HW_FLOW, sc->sc_chanctl_hw_flow); 1439 CZTTY_CHAN_WRITE(sc, CHNCTL_RS_CONTROL, sc->sc_chanctl_rs_control); 1440 1441 CZ_FWCTL_WRITE(cz, BRDCTL_HCMD_CHANNEL, sc->sc_channel); 1442 CZ_PLX_WRITE(cz, PLX_PCI_LOCAL_DOORBELL, C_CM_IOCTLW); 1443 1444 cz_wait_pci_doorbell(cz, "czparam"); 1445 1446 CZ_FWCTL_WRITE(cz, BRDCTL_HCMD_CHANNEL, sc->sc_channel); 1447 CZ_PLX_WRITE(cz, PLX_PCI_LOCAL_DOORBELL, C_CM_IOCTLM); 1448 1449 cz_wait_pci_doorbell(cz, "czparam"); 1450 1451 /* 1452 * Update the tty layer's idea of the carrier bit, in case we changed 1453 * CLOCAL. We don't hang up here; we only do that by explicit 1454 * request. 1455 */ 1456 rs_status = CZTTY_CHAN_READ(sc, CHNCTL_RS_STATUS); 1457 (void) (*tp->t_linesw->l_modem)(tp, ISSET(rs_status, C_RS_DCD)); 1458 1459 return (0); 1460 } 1461 1462 /* 1463 * czttystart: 1464 * 1465 * Start or restart transmission. 1466 */ 1467 static void 1468 czttystart(struct tty *tp) 1469 { 1470 struct cztty_softc *sc = CZTTY_SOFTC(tp->t_dev); 1471 int s; 1472 1473 s = spltty(); 1474 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1475 goto out; 1476 if (!ttypull(tp)) 1477 goto out; 1478 cztty_transmit(sc, tp); 1479 out: 1480 splx(s); 1481 } 1482 1483 /* 1484 * czttystop: 1485 * 1486 * Stop output, e.g., for ^S or output flush. 1487 */ 1488 static void 1489 czttystop(struct tty *tp, int flag) 1490 { 1491 1492 /* 1493 * XXX We don't do anything here, yet. Mostly, I don't know 1494 * XXX exactly how this should be implemented on this device. 1495 * XXX We've given a big chunk of data to the MIPS already, 1496 * XXX and I don't know how we request the MIPS to stop sending 1497 * XXX the data. So, punt for now. --thorpej 1498 */ 1499 } 1500 1501 /* 1502 * cztty_diag: 1503 * 1504 * Issue a scheduled diagnostic message. 1505 */ 1506 static void 1507 cztty_diag(void *arg) 1508 { 1509 struct cztty_softc *sc = arg; 1510 struct cz_softc *cz = CZTTY_CZ(sc); 1511 u_int overflows, parity_errors, framing_errors; 1512 int s; 1513 1514 s = spltty(); 1515 1516 overflows = sc->sc_overflows; 1517 sc->sc_overflows = 0; 1518 1519 parity_errors = sc->sc_parity_errors; 1520 sc->sc_parity_errors = 0; 1521 1522 framing_errors = sc->sc_framing_errors; 1523 sc->sc_framing_errors = 0; 1524 1525 sc->sc_errors = 0; 1526 1527 splx(s); 1528 1529 log(LOG_WARNING, 1530 "%s: channel %d: %u overflow%s, %u parity, %u framing error%s\n", 1531 device_xname(cz->cz_dev), sc->sc_channel, 1532 overflows, overflows == 1 ? "" : "s", 1533 parity_errors, 1534 framing_errors, framing_errors == 1 ? "" : "s"); 1535 } 1536 1537 const struct cdevsw cz_cdevsw = { 1538 .d_open = czttyopen, 1539 .d_close = czttyclose, 1540 .d_read = czttyread, 1541 .d_write = czttywrite, 1542 .d_ioctl = czttyioctl, 1543 .d_stop = czttystop, 1544 .d_tty = czttytty, 1545 .d_poll = czttypoll, 1546 .d_mmap = nommap, 1547 .d_kqfilter = ttykqfilter, 1548 .d_flag = D_TTY 1549 }; 1550 1551 /* 1552 * tx and rx ring buffer size macros: 1553 * 1554 * The transmitter and receiver both use ring buffers. For each one, there 1555 * is a get (consumer) and a put (producer) offset. The get value is the 1556 * next byte to be read from the ring, and the put is the next one to be 1557 * put into the ring. get == put means the ring is empty. 1558 * 1559 * For each ring, the firmware controls one of (get, put) and this driver 1560 * controls the other. For transmission, this driver updates put to point 1561 * past the valid data, and the firmware moves get as bytes are sent. Likewise 1562 * for receive, the driver controls put, and this driver controls get. 1563 */ 1564 #define TX_MOVEABLE(g, p, s) (((g) > (p)) ? ((g) - (p) - 1) : ((s) - (p))) 1565 #define RX_MOVEABLE(g, p, s) (((g) > (p)) ? ((s) - (g)) : ((p) - (g))) 1566 1567 /* 1568 * cztty_transmit() 1569 * 1570 * Look at the tty for this port and start sending. 1571 */ 1572 static int 1573 cztty_transmit(struct cztty_softc *sc, struct tty *tp) 1574 { 1575 struct cz_softc *cz = CZTTY_CZ(sc); 1576 u_int move, get, put, size, address; 1577 #ifdef HOSTRAMCODE 1578 int error, done = 0; 1579 #else 1580 int done = 0; 1581 #endif 1582 1583 size = CZTTY_BUF_READ(sc, BUFCTL_TX_BUFSIZE); 1584 get = CZTTY_BUF_READ(sc, BUFCTL_TX_GET); 1585 put = CZTTY_BUF_READ(sc, BUFCTL_TX_PUT); 1586 address = CZTTY_BUF_READ(sc, BUFCTL_TX_BUFADDR); 1587 1588 while ((tp->t_outq.c_cc > 0) && ((move = TX_MOVEABLE(get, put, size)))){ 1589 #ifdef HOSTRAMCODE 1590 if (0) { 1591 move = min(tp->t_outq.c_cc, move); 1592 error = q_to_b(&tp->t_outq, 0, move); 1593 if (error != move) { 1594 printf("%s: channel %d: error moving to " 1595 "transmit buf\n", device_xname(cz->cz_dev), 1596 sc->sc_channel); 1597 move = error; 1598 } 1599 } else { 1600 #endif 1601 move = min(ndqb(&tp->t_outq, 0), move); 1602 bus_space_write_region_1(cz->cz_win_st, cz->cz_win_sh, 1603 address + put, tp->t_outq.c_cf, move); 1604 ndflush(&tp->t_outq, move); 1605 #ifdef HOSTRAMCODE 1606 } 1607 #endif 1608 1609 put = ((put + move) % size); 1610 done = 1; 1611 } 1612 if (done) { 1613 CZTTY_BUF_WRITE(sc, BUFCTL_TX_PUT, put); 1614 } 1615 return (done); 1616 } 1617 1618 static int 1619 cztty_receive(struct cztty_softc *sc, struct tty *tp) 1620 { 1621 struct cz_softc *cz = CZTTY_CZ(sc); 1622 u_int get, put, size, address; 1623 int done = 0, ch; 1624 1625 size = CZTTY_BUF_READ(sc, BUFCTL_RX_BUFSIZE); 1626 get = CZTTY_BUF_READ(sc, BUFCTL_RX_GET); 1627 put = CZTTY_BUF_READ(sc, BUFCTL_RX_PUT); 1628 address = CZTTY_BUF_READ(sc, BUFCTL_RX_BUFADDR); 1629 1630 while ((get != put) && ((tp->t_canq.c_cc + tp->t_rawq.c_cc) < tp->t_hiwat)) { 1631 #ifdef HOSTRAMCODE 1632 if (hostram) { 1633 ch = ((char *)fifoaddr)[get]; 1634 } else { 1635 #endif 1636 ch = bus_space_read_1(cz->cz_win_st, cz->cz_win_sh, 1637 address + get); 1638 #ifdef HOSTRAMCODE 1639 } 1640 #endif 1641 (*tp->t_linesw->l_rint)(ch, tp); 1642 get = (get + 1) % size; 1643 done = 1; 1644 } 1645 if (done) { 1646 CZTTY_BUF_WRITE(sc, BUFCTL_RX_GET, get); 1647 } 1648 return (done); 1649 } 1650
Indexes created Thu Sep 25 08:09:54 GMT 2025