zs_hb.c revision 1.17
1 /* $NetBSD: zs_hb.c,v 1.17 2003/07/15 02:59:30 lukem 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Zilog Z8530 Dual UART driver (machine-dependent part) 41 * 42 * Runs two serial lines per chip using slave drivers. 43 * Plain tty/async lines use the zs_async slave. 44 * Sun keyboard/mouse uses the zs_kbd/zs_ms slaves. 45 */ 46 47 #include <sys/cdefs.h> 48 __KERNEL_RCSID(0, "$NetBSD: zs_hb.c,v 1.17 2003/07/15 02:59:30 lukem Exp $"); 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/device.h> 53 #include <sys/tty.h> 54 #include <sys/conf.h> 55 56 #include <machine/adrsmap.h> 57 #include <machine/cpu.h> 58 #include <machine/z8530var.h> 59 60 #include <dev/cons.h> 61 #include <dev/ic/z8530reg.h> 62 63 #include <newsmips/dev/hbvar.h> 64 65 #include "zsc.h" /* NZSC */ 66 #define NZS NZSC 67 68 /* Make life easier for the initialized arrays here. */ 69 #if NZS < 2 70 #undef NZS 71 #define NZS 2 72 #endif 73 74 #define ZSCFLAG_EX 0x01 /* expansion board */ 75 76 /* 77 * The news3400 provides a 4.9152 MHz clock to the ZS chips. 78 */ 79 #define PCLK (9600 * 512) /* PCLK pin input clock rate */ 80 #define PCLK_EX (9600 * 384) 81 82 /* 83 * Define interrupt levels. 84 */ 85 #define ZSHARD_PRI 64 86 87 #define ZS_DELAY() {(void)*(volatile char *)INTEN1; delay(2);} 88 89 /* The layout of this is hardware-dependent (padding, order). */ 90 struct zschan { 91 volatile u_char zc_csr; /* ctrl,status, and indirect access */ 92 volatile u_char zc_data; /* data */ 93 }; 94 struct zsdevice { 95 /* Yes, they are backwards. */ 96 struct zschan zs_chan_b; 97 struct zschan zs_chan_a; 98 }; 99 100 extern int zs_def_cflag; 101 102 static struct zsdevice *zsaddr[NZS]; 103 104 /* Flags from cninit() */ 105 static int zs_hwflags[NZS][2]; 106 107 /* Default speed for all channels */ 108 static int zs_defspeed = 9600; 109 110 static u_char zs_init_reg[16] = { 111 0, /* 0: CMD (reset, etc.) */ 112 0, /* 1: No interrupts yet. */ 113 ZSHARD_PRI, /* IVECT */ 114 ZSWR3_RX_8 | ZSWR3_RX_ENABLE, 115 ZSWR4_CLK_X16 | ZSWR4_ONESB | ZSWR4_EVENP, 116 ZSWR5_TX_8 | ZSWR5_TX_ENABLE, 117 0, /* 6: TXSYNC/SYNCLO */ 118 0, /* 7: RXSYNC/SYNCHI */ 119 0, /* 8: alias for data port */ 120 ZSWR9_MASTER_IE, 121 0, /*10: Misc. TX/RX control bits */ 122 ZSWR11_TXCLK_BAUD | ZSWR11_RXCLK_BAUD, 123 ((PCLK/32)/9600)-2, /*12: BAUDLO (default=9600) */ 124 0, /*13: BAUDHI (default=9600) */ 125 ZSWR14_BAUD_ENA | ZSWR14_BAUD_FROM_PCLK, 126 ZSWR15_BREAK_IE, 127 }; 128 129 static struct zschan * zs_get_chan_addr __P((int, int)); 130 static void zs_hb_delay __P((void)); 131 static int zshard_hb __P((void *)); 132 static int zs_getc __P((void *)); 133 static void zs_putc __P((void *, int)); 134 135 struct zschan * 136 zs_get_chan_addr(zs_unit, channel) 137 int zs_unit, channel; 138 { 139 struct zsdevice *addr; 140 struct zschan *zc; 141 142 if (zs_unit >= NZS) 143 return NULL; 144 addr = zsaddr[zs_unit]; 145 if (addr == NULL) 146 return NULL; 147 if (channel == 0) { 148 zc = &addr->zs_chan_a; 149 } else { 150 zc = &addr->zs_chan_b; 151 } 152 return (zc); 153 } 154 155 static void 156 zs_hb_delay() 157 { 158 159 ZS_DELAY(); 160 } 161 162 /**************************************************************** 163 * Autoconfig 164 ****************************************************************/ 165 166 /* Definition of the driver for autoconfig. */ 167 int zs_hb_match __P((struct device *, struct cfdata *, void *)); 168 void zs_hb_attach __P((struct device *, struct device *, void *)); 169 170 CFATTACH_DECL(zsc_hb, sizeof(struct zsc_softc), 171 zs_hb_match, zs_hb_attach, NULL, NULL); 172 173 /* 174 * Is the zs chip present? 175 */ 176 int 177 zs_hb_match(parent, cf, aux) 178 struct device *parent; 179 struct cfdata *cf; 180 void *aux; 181 { 182 struct hb_attach_args *ha = aux; 183 184 if (strcmp(ha->ha_name, "zsc")) 185 return 0; 186 187 /* This returns -1 on a fault (bus error). */ 188 if (hb_badaddr((char *)ha->ha_addr, 1)) 189 return 0; 190 191 return 1; 192 } 193 194 /* 195 * Attach a found zs. 196 * 197 * Match slave number to zs unit number, so that misconfiguration will 198 * not set up the keyboard as ttya, etc. 199 */ 200 void 201 zs_hb_attach(parent, self, aux) 202 struct device *parent; 203 struct device *self; 204 void *aux; 205 { 206 struct zsc_softc *zsc = (void *)self; 207 struct hb_attach_args *ha = aux; 208 struct zsc_attach_args zsc_args; 209 volatile struct zschan *zc; 210 struct zs_chanstate *cs; 211 int s, zs_unit, channel, intlevel; 212 static int didintr; 213 214 zs_unit = zsc->zsc_dev.dv_unit; 215 intlevel = ha->ha_level; 216 zsaddr[zs_unit] = (void *)ha->ha_addr; 217 218 if (intlevel == -1) { 219 #if 0 220 printf(": interrupt level not configured\n"); 221 return; 222 #else 223 printf(": interrupt level not configured; using"); 224 intlevel = 1; 225 #endif 226 } 227 228 printf(" level %d\n", intlevel); 229 230 zs_delay = zs_hb_delay; 231 232 /* 233 * Initialize software state for each channel. 234 */ 235 for (channel = 0; channel < 2; channel++) { 236 zsc_args.channel = channel; 237 zsc_args.hwflags = zs_hwflags[zs_unit][channel]; 238 cs = &zsc->zsc_cs_store[channel]; 239 zsc->zsc_cs[channel] = cs; 240 241 simple_lock_init(&cs->cs_lock); 242 cs->cs_channel = channel; 243 cs->cs_private = NULL; 244 cs->cs_ops = &zsops_null; 245 if ((zsc->zsc_dev.dv_cfdata->cf_flags & ZSCFLAG_EX) == 0) 246 cs->cs_brg_clk = PCLK / 16; 247 else 248 cs->cs_brg_clk = PCLK_EX / 16; 249 250 zc = zs_get_chan_addr(zs_unit, channel); 251 cs->cs_reg_csr = &zc->zc_csr; 252 cs->cs_reg_data = &zc->zc_data; 253 254 bcopy(zs_init_reg, cs->cs_creg, 16); 255 bcopy(zs_init_reg, cs->cs_preg, 16); 256 257 /* XXX: Get these from the EEPROM instead? */ 258 /* XXX: See the mvme167 code. Better. */ 259 if (zsc_args.hwflags & ZS_HWFLAG_CONSOLE) 260 cs->cs_defspeed = zs_get_speed(cs); 261 else 262 cs->cs_defspeed = zs_defspeed; 263 cs->cs_defcflag = zs_def_cflag; 264 265 /* Make these correspond to cs_defcflag (-crtscts) */ 266 cs->cs_rr0_dcd = ZSRR0_DCD; 267 cs->cs_rr0_cts = 0; 268 cs->cs_wr5_dtr = ZSWR5_DTR | ZSWR5_RTS; 269 cs->cs_wr5_rts = 0; 270 271 /* 272 * Clear the master interrupt enable. 273 * The INTENA is common to both channels, 274 * so just do it on the A channel. 275 */ 276 if (channel == 0) { 277 zs_write_reg(cs, 9, 0); 278 } 279 280 /* 281 * Look for a child driver for this channel. 282 * The child attach will setup the hardware. 283 */ 284 if (!config_found(self, (void *)&zsc_args, zs_print)) { 285 /* No sub-driver. Just reset it. */ 286 u_char reset = (channel == 0) ? 287 ZSWR9_A_RESET : ZSWR9_B_RESET; 288 s = splhigh(); 289 zs_write_reg(cs, 9, reset); 290 splx(s); 291 } 292 } 293 294 /* 295 * Now safe to install interrupt handlers. Note the arguments 296 * to the interrupt handlers aren't used. Note, we only do this 297 * once since both SCCs interrupt at the same level and vector. 298 */ 299 if (!didintr) { 300 didintr = 1; 301 302 zsc->zsc_si = softintr_establish(IPL_SOFTSERIAL, zssoft, zsc); 303 hb_intr_establish(intlevel, INTST1_SCC, IPL_SERIAL, 304 zshard_hb, NULL); 305 } 306 /* XXX; evcnt_attach() ? */ 307 308 /* 309 * Set the master interrupt enable and interrupt vector. 310 * (common to both channels, do it on A) 311 */ 312 cs = zsc->zsc_cs[0]; 313 s = splhigh(); 314 /* interrupt vector */ 315 zs_write_reg(cs, 2, zs_init_reg[2]); 316 /* master interrupt control (enable) */ 317 zs_write_reg(cs, 9, zs_init_reg[9]); 318 splx(s); 319 } 320 321 static int 322 zshard_hb(arg) 323 void *arg; 324 { 325 int rv; 326 327 (void) *(volatile u_char *)SCCVECT; 328 rv = zshard(arg); 329 330 /* XXX news3400 sometimes losts zs interrupt */ 331 if (rv) 332 zshard(arg); 333 334 return rv; 335 } 336 337 /* 338 * Polled input char. 339 */ 340 int 341 zs_getc(arg) 342 void *arg; 343 { 344 volatile struct zschan *zc = arg; 345 int s, c, rr0; 346 347 s = splhigh(); 348 /* Wait for a character to arrive. */ 349 do { 350 rr0 = zc->zc_csr; 351 ZS_DELAY(); 352 } while ((rr0 & ZSRR0_RX_READY) == 0); 353 354 c = zc->zc_data; 355 ZS_DELAY(); 356 splx(s); 357 358 /* 359 * This is used by the kd driver to read scan codes, 360 * so don't translate '\r' ==> '\n' here... 361 */ 362 return (c); 363 } 364 365 /* 366 * Polled output char. 367 */ 368 void 369 zs_putc(arg, c) 370 void *arg; 371 int c; 372 { 373 volatile struct zschan *zc = arg; 374 int s, rr0; 375 376 s = splhigh(); 377 /* Wait for transmitter to become ready. */ 378 do { 379 rr0 = zc->zc_csr; 380 ZS_DELAY(); 381 } while ((rr0 & ZSRR0_TX_READY) == 0); 382 383 zc->zc_data = c; 384 ZS_DELAY(); 385 splx(s); 386 } 387 388 /*****************************************************************/ 389 390 static void zscnprobe __P((struct consdev *)); 391 static void zscninit __P((struct consdev *)); 392 static int zscngetc __P((dev_t)); 393 static void zscnputc __P((dev_t, int)); 394 395 struct consdev consdev_zs = { 396 zscnprobe, 397 zscninit, 398 zscngetc, 399 zscnputc, 400 nullcnpollc, 401 NULL, 402 NULL, 403 NULL, 404 NODEV, 405 CN_DEAD 406 }; 407 408 static void 409 zscnprobe(cn) 410 struct consdev *cn; 411 { 412 } 413 414 static void 415 zscninit(cn) 416 struct consdev *cn; 417 { 418 extern const struct cdevsw zstty_cdevsw; 419 420 cn->cn_dev = makedev(cdevsw_lookup_major(&zstty_cdevsw), 0); 421 cn->cn_pri = CN_REMOTE; 422 zs_hwflags[0][0] = ZS_HWFLAG_CONSOLE; 423 } 424 425 static int 426 zscngetc(dev) 427 dev_t dev; 428 { 429 430 return zs_getc((void *)SCCPORT0A); 431 } 432 433 static void 434 zscnputc(dev, c) 435 dev_t dev; 436 int c; 437 { 438 439 zs_putc((void *)SCCPORT0A, c); 440 } 441
Indexes created Tue Sep 30 11:09:46 GMT 2025