zs_ap.c revision 1.29
1 /* $NetBSD: zs_ap.c,v 1.29 2018/10/14 00:10:11 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Gordon W. Ross. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Zilog Z8530 Dual UART driver (machine-dependent part) 34 * 35 * Runs two serial lines per chip using slave drivers. 36 * Plain tty/async lines use the zs_async slave. 37 * Sun keyboard/mouse uses the zs_kbd/zs_ms slaves. 38 */ 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: zs_ap.c,v 1.29 2018/10/14 00:10:11 tsutsui Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/device.h> 46 #include <sys/tty.h> 47 #include <sys/conf.h> 48 #include <sys/cpu.h> 49 #include <sys/intr.h> 50 #ifdef NEWS4000_ZS_AP_POLLING 51 #include <sys/callout.h> 52 #endif 53 54 #include <machine/adrsmap.h> 55 #include <machine/z8530var.h> 56 57 #include <dev/cons.h> 58 #include <dev/ic/z8530reg.h> 59 60 #include <newsmips/apbus/apbusvar.h> 61 62 #include "zsc.h" /* NZSC */ 63 #define NZS NZSC 64 65 /* Make life easier for the initialized arrays here. */ 66 #if NZS < 2 67 #undef NZS 68 #define NZS 2 69 #endif 70 71 #define NEWS5000_PORTB_TXPORT 0x00000000 72 #define NEWS5000_PORTB_RXPORT 0x00010000 73 #define NEWS5000_PORTA_TXPORT 0x00020000 74 #define NEWS5000_PORTA_RXPORT 0x00030000 75 #define NEWS5000_DMA_MODE_REG 3 76 #define NEWS5000_DMA_ENABLE 0x01 /* DMA enable */ 77 #define NEWS5000_DMA_DIR_DM 0x00 /* device to memory */ 78 #define NEWS5000_DMA_DIR_MD 0x02 /* memory to device */ 79 #define NEWS5000_DMA_EXTRDY 0x08 /* DMA external ready */ 80 #define NEWS5000_PORTB_OFFSET 0x00040000 81 #define NEWS5000_PORTA_OFFSET 0x00050000 82 #define NEWS5000_PORT_CTL 2 83 #define NEWS5000_PORTCTL_RI 0x01 84 #define NEWS5000_PORTCTL_DSR 0x02 85 #define NEWS5000_PORTCTL_DTR 0x04 86 #define NEWS5000_PORT_SEL 3 87 #define NEWS5000_PORTSEL_LOCALTALK 0x01 88 #define NEWS5000_PORTSEL_RS232C 0x02 89 #define NEWS5000_ESCC_REG 0x00060000 90 #define NEWS5000_ESCCREG_INTSTAT 0 91 #define NEWS5000_INTSTAT_SCC 0x01 92 #define NEWS5000_ESCCREG_INTMASK 1 93 #define NEWS5000_INTMASK_SCC 0x01 94 95 #define NEWS4000_PORTB_TXPORT 0x00000000 /* XXX: not confirmed */ 96 #define NEWS4000_PORTB_RXPORT 0x00010000 /* XXX: not confirmed */ 97 #define NEWS4000_PORTA_TXPORT 0x00040000 /* XXX: not confirmed */ 98 #define NEWS4000_PORTA_RXPORT 0x00050000 /* XXX: not confirmed */ 99 #define NEWS4000_DMA_MODE_REG 3 100 #define NEWS4000_DMA_ENABLE 0x01 /* DMA enable */ 101 #define NEWS4000_DMA_DIR_DM 0x00 /* device to memory */ 102 #define NEWS4000_DMA_DIR_MD 0x02 /* memory to device */ 103 #define NEWS4000_DMA_EXTRDY 0x08 /* DMA external ready */ 104 #define NEWS4000_PORTB_CTL 0x00020000 /* XXX: not confirmed */ 105 #define NEWS4000_PORTA_CTL 0x00060000 /* XXX: not confirmed */ 106 #define NEWS4000_PORT_CTL 4 107 #define NEWS4000_PORTCTL_RI 0x01 108 #define NEWS4000_PORTCTL_DSR 0x02 109 #define NEWS4000_PORTCTL_DTR 0x04 110 #define NEWS4000_PORT_SEL 5 111 #define NEWS4000_PORTSEL_LOCALTALK 0x01 112 #define NEWS4000_PORTSEL_RS232C 0x02 113 #define NEWS4000_ESCC_REG 0x00060000 /* XXX: not confirmed */ 114 #define NEWS4000_ESCCREG_INTSTAT 0 115 #define NEWS4000_INTSTAT_SCC 0x01 116 #define NEWS4000_ESCCREG_INTMASK 1 117 #define NEWS4000_INTMASK_SCC 0x01 118 #define NEWS4000_PORTB_OFFSET 0x00080000 119 #define NEWS4000_PORTA_OFFSET 0x00080008 120 121 extern int zs_def_cflag; 122 extern void (*zs_delay)(void); 123 124 /* 125 * The news5000 provides a 9.8304 MHz clock to the ZS chips. 126 */ 127 #define PCLK (9600 * 1024) /* PCLK pin input clock rate */ 128 129 #define ZS_DELAY() DELAY(2) 130 131 /* The layout of this is hardware-dependent (padding, order). */ 132 struct zschan { 133 volatile uint8_t pad1[3]; 134 volatile uint8_t zc_csr; /* ctrl,status, and indirect access */ 135 volatile uint8_t pad2[3]; 136 volatile uint8_t zc_data; /* data */ 137 }; 138 139 static void *zsaddr[NZS]; 140 141 /* Flags from cninit() */ 142 static int zs_hwflags[NZS][2]; 143 144 /* Default speed for all channels */ 145 static int zs_defspeed = 9600; 146 147 static uint8_t zs_init_reg[16] = { 148 0, /* 0: CMD (reset, etc.) */ 149 0, /* 1: No interrupts yet. */ 150 0, /* IVECT */ 151 ZSWR3_RX_8 | ZSWR3_RX_ENABLE, 152 ZSWR4_CLK_X16 | ZSWR4_ONESB | ZSWR4_EVENP, 153 ZSWR5_TX_8 | ZSWR5_TX_ENABLE, 154 0, /* 6: TXSYNC/SYNCLO */ 155 0, /* 7: RXSYNC/SYNCHI */ 156 0, /* 8: alias for data port */ 157 ZSWR9_MASTER_IE, 158 0, /*10: Misc. TX/RX control bits */ 159 ZSWR11_TXCLK_BAUD | ZSWR11_RXCLK_BAUD, 160 ((PCLK/32)/9600)-2, /*12: BAUDLO (default=9600) */ 161 0, /*13: BAUDHI (default=9600) */ 162 ZSWR14_BAUD_ENA | ZSWR14_BAUD_FROM_PCLK, 163 ZSWR15_BREAK_IE, 164 }; 165 166 #ifdef NEWS4000_ZS_AP_POLLING 167 static struct callout zscallout; 168 #endif 169 170 static struct zschan * zs_get_chan_addr(int, int); 171 static void zs_ap_delay(void); 172 static int zshard_ap(void *); 173 static int zs_getc(void *); 174 static void zs_putc(void *, int); 175 176 struct zschan * 177 zs_get_chan_addr(int zs_unit, int channel) 178 { 179 void *addr; 180 struct zschan *zc = NULL; 181 182 if (zs_unit >= NZS) 183 return NULL; 184 addr = zsaddr[zs_unit]; 185 if (addr == NULL) 186 return NULL; 187 if (systype == NEWS5000) { 188 if (channel == 0) { 189 zc = (void *)((uint8_t *)addr + NEWS5000_PORTA_OFFSET); 190 } else { 191 zc = (void *)((uint8_t *)addr + NEWS5000_PORTB_OFFSET); 192 } 193 } 194 if (systype == NEWS4000) { 195 if (channel == 0) { 196 zc = (void *)((uint8_t *)addr + NEWS4000_PORTA_OFFSET); 197 } else { 198 zc = (void *)((uint8_t *)addr + NEWS4000_PORTB_OFFSET); 199 } 200 } 201 return zc; 202 } 203 204 void 205 zs_ap_delay(void) 206 { 207 208 ZS_DELAY(); 209 } 210 211 /**************************************************************** 212 * Autoconfig 213 ****************************************************************/ 214 215 /* Definition of the driver for autoconfig. */ 216 int zs_ap_match(device_t, cfdata_t, void *); 217 void zs_ap_attach(device_t, device_t, void *); 218 219 CFATTACH_DECL_NEW(zsc_ap, sizeof(struct zsc_softc), 220 zs_ap_match, zs_ap_attach, NULL, NULL); 221 222 /* 223 * Is the zs chip present? 224 */ 225 int 226 zs_ap_match(device_t parent, cfdata_t cf, void *aux) 227 { 228 struct apbus_attach_args *apa = aux; 229 230 if (strcmp("esccf", apa->apa_name) == 0 || 231 strcmp("esccg", apa->apa_name) == 0) 232 return 1; 233 234 return 0; 235 } 236 237 /* 238 * Attach a found zs. 239 * 240 * Match slave number to zs unit number, so that misconfiguration will 241 * not set up the keyboard as ttya, etc. 242 */ 243 void 244 zs_ap_attach(device_t parent, device_t self, void *aux) 245 { 246 struct zsc_softc *zsc = device_private(self); 247 struct apbus_attach_args *apa = aux; 248 struct zsc_attach_args zsc_args; 249 volatile struct zschan *zc; 250 struct zs_chanstate *cs; 251 int s, zs_unit, channel; 252 volatile uint32_t *txBfifo; 253 volatile uint32_t *rxBfifo; 254 volatile uint32_t *txAfifo; 255 volatile uint32_t *rxAfifo; 256 volatile uint32_t *portBctl; 257 volatile uint32_t *portActl; 258 volatile uint32_t *esccregs; 259 260 zsc->zsc_dev = self; 261 zs_unit = device_unit(self); 262 zsaddr[zs_unit] = (void *)apa->apa_hwbase; 263 264 aprint_normal(" slot%d addr 0x%lx\n", apa->apa_slotno, apa->apa_hwbase); 265 266 /* XXX: appease gcc -Wuninitialized */ 267 txBfifo = (void *)(apa->apa_hwbase); 268 rxBfifo = (void *)(apa->apa_hwbase); 269 txAfifo = (void *)(apa->apa_hwbase); 270 rxAfifo = (void *)(apa->apa_hwbase); 271 portBctl = (void *)(apa->apa_hwbase); 272 portActl = (void *)(apa->apa_hwbase); 273 esccregs = (void *)(apa->apa_hwbase); 274 275 if (systype == NEWS5000) { 276 txBfifo = (void *)(apa->apa_hwbase + NEWS5000_PORTB_TXPORT); 277 rxBfifo = (void *)(apa->apa_hwbase + NEWS5000_PORTB_RXPORT); 278 txAfifo = (void *)(apa->apa_hwbase + NEWS5000_PORTA_TXPORT); 279 rxAfifo = (void *)(apa->apa_hwbase + NEWS5000_PORTA_RXPORT); 280 portBctl = (void *)(apa->apa_hwbase + NEWS5000_PORTB_OFFSET); 281 portActl = (void *)(apa->apa_hwbase + NEWS5000_PORTA_OFFSET); 282 esccregs = (void *)(apa->apa_hwbase + NEWS5000_ESCC_REG); 283 } 284 if (systype == NEWS4000) { 285 txBfifo = (void *)(apa->apa_hwbase + NEWS4000_PORTB_TXPORT); 286 rxBfifo = (void *)(apa->apa_hwbase + NEWS4000_PORTB_RXPORT); 287 txAfifo = (void *)(apa->apa_hwbase + NEWS4000_PORTA_TXPORT); 288 rxAfifo = (void *)(apa->apa_hwbase + NEWS4000_PORTA_RXPORT); 289 portBctl = (void *)(apa->apa_hwbase + NEWS4000_PORTB_CTL); 290 portActl = (void *)(apa->apa_hwbase + NEWS4000_PORTA_CTL); 291 esccregs = (void *)(apa->apa_hwbase + NEWS4000_ESCC_REG); 292 } 293 294 if (systype == NEWS5000) { 295 txAfifo[NEWS5000_DMA_MODE_REG] = NEWS5000_DMA_EXTRDY; 296 rxAfifo[NEWS5000_DMA_MODE_REG] = NEWS5000_DMA_EXTRDY; 297 txBfifo[NEWS5000_DMA_MODE_REG] = NEWS5000_DMA_EXTRDY; 298 rxBfifo[NEWS5000_DMA_MODE_REG] = NEWS5000_DMA_EXTRDY; 299 300 /* assert DTR */ /* XXX */ 301 portBctl[NEWS5000_PORT_CTL] = NEWS5000_PORTCTL_DTR; 302 portActl[NEWS5000_PORT_CTL] = NEWS5000_PORTCTL_DTR; 303 304 /* select RS-232C (ch1 only) */ 305 portActl[NEWS5000_PORT_SEL] = NEWS5000_PORTSEL_RS232C; 306 307 /* enable SCC interrupts */ 308 esccregs[NEWS5000_ESCCREG_INTMASK] = NEWS5000_INTMASK_SCC; 309 } 310 311 if (systype == NEWS4000) { 312 txAfifo[NEWS4000_DMA_MODE_REG] = NEWS4000_DMA_EXTRDY; 313 rxAfifo[NEWS4000_DMA_MODE_REG] = NEWS4000_DMA_EXTRDY; 314 txBfifo[NEWS4000_DMA_MODE_REG] = NEWS4000_DMA_EXTRDY; 315 rxBfifo[NEWS4000_DMA_MODE_REG] = NEWS4000_DMA_EXTRDY; 316 317 #if 1 /* XXX: zsc on news4000 seems mangled by these ops */ 318 /* assert DTR */ /* XXX */ 319 portBctl[NEWS4000_PORT_CTL] = NEWS4000_PORTCTL_DTR; 320 portActl[NEWS4000_PORT_CTL] = NEWS4000_PORTCTL_DTR; 321 322 /* select RS-232C (ch1 only) */ 323 portActl[NEWS4000_PORT_SEL] = NEWS4000_PORTSEL_RS232C; 324 #endif 325 326 /* enable SCC interrupts */ 327 esccregs[NEWS4000_ESCCREG_INTMASK] = NEWS4000_INTMASK_SCC; 328 } 329 330 zs_delay = zs_ap_delay; 331 332 /* 333 * Initialize software state for each channel. 334 */ 335 for (channel = 0; channel < 2; channel++) { 336 zsc_args.channel = channel; 337 zsc_args.hwflags = zs_hwflags[zs_unit][channel]; 338 cs = &zsc->zsc_cs_store[channel]; 339 zsc->zsc_cs[channel] = cs; 340 341 zs_lock_init(cs); 342 cs->cs_channel = channel; 343 cs->cs_private = NULL; 344 cs->cs_ops = &zsops_null; 345 cs->cs_brg_clk = PCLK / 16; 346 347 zc = zs_get_chan_addr(zs_unit, channel); 348 cs->cs_reg_csr = &zc->zc_csr; 349 cs->cs_reg_data = &zc->zc_data; 350 351 memcpy(cs->cs_creg, zs_init_reg, 16); 352 memcpy(cs->cs_preg, zs_init_reg, 16); 353 354 /* XXX: Get these from the EEPROM instead? */ 355 /* XXX: See the mvme167 code. Better. */ 356 if (zsc_args.hwflags & ZS_HWFLAG_CONSOLE) 357 cs->cs_defspeed = zs_get_speed(cs); 358 else 359 cs->cs_defspeed = zs_defspeed; 360 cs->cs_defcflag = zs_def_cflag; 361 362 /* Make these correspond to cs_defcflag (-crtscts) */ 363 cs->cs_rr0_dcd = ZSRR0_DCD; 364 cs->cs_rr0_cts = 0; 365 cs->cs_wr5_dtr = ZSWR5_DTR | ZSWR5_RTS; 366 cs->cs_wr5_rts = 0; 367 368 /* 369 * Clear the master interrupt enable. 370 * The INTENA is common to both channels, 371 * so just do it on the A channel. 372 */ 373 if (channel == 0) { 374 zs_write_reg(cs, 9, 0); 375 } 376 377 /* 378 * Look for a child driver for this channel. 379 * The child attach will setup the hardware. 380 */ 381 if (!config_found(self, (void *)&zsc_args, zs_print)) { 382 /* No sub-driver. Just reset it. */ 383 uint8_t reset = (channel == 0) ? 384 ZSWR9_A_RESET : ZSWR9_B_RESET; 385 s = splhigh(); 386 zs_write_reg(cs, 9, reset); 387 splx(s); 388 } 389 } 390 391 /* 392 * Now safe to install interrupt handlers. 393 */ 394 zsc->zsc_si = softint_establish(SOFTINT_SERIAL, 395 (void (*)(void *))zsc_intr_soft, zsc); 396 if (systype == NEWS5000) { 397 apbus_intr_establish(1, /* interrupt level ( 0 or 1 ) */ 398 NEWS5000_INT1_SCC, 399 0, /* priority */ 400 zshard_ap, zsc, 401 device_xname(self), apa->apa_ctlnum); 402 } 403 if (systype == NEWS4000) { 404 apbus_intr_establish(1, /* interrupt level ( 0 or 1 ) */ 405 0x0200, 406 0, /* priority */ 407 zshard_ap, zsc, 408 device_xname(self), apa->apa_ctlnum); 409 #ifdef NEWS4000_ZS_AP_POLLING 410 /* XXX: no info how to enable zs ap interrupt for now */ 411 callout_init(&zscallout, 0); 412 callout_reset(&zscallout, 1, 413 (void (*)(void *))zshard_ap, (void *)zsc); 414 #endif 415 } 416 /* XXX; evcnt_attach() ? */ 417 418 #if 0 419 { 420 u_int x; 421 422 /* determine SCC/ESCC type */ 423 x = zs_read_reg(cs, 15); 424 zs_write_reg(cs, 15, x | ZSWR15_ENABLE_ENHANCED); 425 426 if (zs_read_reg(cs, 15) & ZSWR15_ENABLE_ENHANCED) { /* ESCC Z85230 */ 427 zs_write_reg(cs, 7, ZSWR7P_EXTEND_READ | ZSWR7P_TX_FIFO); 428 } 429 } 430 #endif 431 432 /* 433 * Set the master interrupt enable and interrupt vector. 434 * (common to both channels, do it on A) 435 */ 436 cs = zsc->zsc_cs[0]; 437 s = splhigh(); 438 /* interrupt vector */ 439 zs_write_reg(cs, 2, zs_init_reg[2]); 440 /* master interrupt control (enable) */ 441 zs_write_reg(cs, 9, zs_init_reg[9]); 442 splx(s); 443 } 444 445 static int 446 zshard_ap(void *arg) 447 { 448 449 zshard(arg); 450 #ifdef NEWS4000_ZS_AP_POLLING 451 if (systype == NEWS4000) { 452 callout_schedule(&zscallout, 1); 453 } 454 #endif 455 return 1; 456 } 457 458 /* 459 * Polled input char. 460 */ 461 int 462 zs_getc(void *arg) 463 { 464 volatile struct zschan *zc = arg; 465 int s, c; 466 uint8_t rr0; 467 468 s = splhigh(); 469 /* Wait for a character to arrive. */ 470 do { 471 rr0 = zc->zc_csr; 472 ZS_DELAY(); 473 } while ((rr0 & ZSRR0_RX_READY) == 0); 474 475 c = zc->zc_data; 476 ZS_DELAY(); 477 splx(s); 478 479 /* 480 * This is used by the kd driver to read scan codes, 481 * so don't translate '\r' ==> '\n' here... 482 */ 483 return c; 484 } 485 486 /* 487 * Polled output char. 488 */ 489 void 490 zs_putc(void *arg, int c) 491 { 492 volatile struct zschan *zc = arg; 493 int s; 494 uint8_t rr0; 495 496 s = splhigh(); 497 /* Wait for transmitter to become ready. */ 498 do { 499 rr0 = zc->zc_csr; 500 ZS_DELAY(); 501 } while ((rr0 & ZSRR0_TX_READY) == 0); 502 503 zc->zc_data = c; 504 ZS_DELAY(); 505 splx(s); 506 } 507 508 /*****************************************************************/ 509 510 static void zscnprobe(struct consdev *); 511 static void zscninit(struct consdev *); 512 static int zscngetc(dev_t); 513 static void zscnputc(dev_t, int); 514 515 struct consdev consdev_zs_ap = { 516 zscnprobe, 517 zscninit, 518 zscngetc, 519 zscnputc, 520 nullcnpollc, 521 NULL, 522 NULL, 523 NULL, 524 NODEV, 525 CN_DEAD 526 }; 527 528 static void 529 zscnprobe(struct consdev *cn) 530 { 531 } 532 533 static void 534 zscninit(struct consdev *cn) 535 { 536 extern const struct cdevsw zstty_cdevsw; 537 538 cn->cn_dev = makedev(cdevsw_lookup_major(&zstty_cdevsw), 0); 539 cn->cn_pri = CN_REMOTE; 540 zs_hwflags[0][0] = ZS_HWFLAG_CONSOLE; 541 } 542 543 static int 544 zscngetc(dev_t dev) 545 { 546 void *sccport0a; 547 548 if (systype == NEWS5000) 549 sccport0a = (void *)NEWS5000_SCCPORT0A; 550 if (systype == NEWS4000) 551 sccport0a = (void *)NEWS4000_SCCPORT0A; 552 553 return zs_getc(sccport0a); 554 } 555 556 static void 557 zscnputc(dev_t dev, int c) 558 { 559 void *sccport0a; 560 561 if (systype == NEWS5000) 562 sccport0a = (void *)NEWS5000_SCCPORT0A; 563 if (systype == NEWS4000) 564 sccport0a = (void *)NEWS4000_SCCPORT0A; 565 566 zs_putc(sccport0a, c); 567 } 568
Indexes created Sun Oct 05 05:09:57 GMT 2025