Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/ibm561.c
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1 /* $NetBSD: ibm561.c,v 1.14 2020/12/04 00:38:08 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Roland C. Dowdeswell of Ponte, Inc. 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 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: ibm561.c,v 1.14 2020/12/04 00:38:08 thorpej Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/device.h> 38 #include <sys/buf.h> 39 #include <sys/kernel.h> 40 #include <sys/kmem.h> 41 42 #include <dev/pci/pcivar.h> 43 #include <dev/ic/ibm561reg.h> 44 #include <dev/ic/ibm561var.h> 45 #include <dev/ic/ramdac.h> 46 47 #include <dev/wscons/wsconsio.h> 48 49 /* 50 * Functions exported via the RAMDAC configuration table. 51 */ 52 void ibm561_init(struct ramdac_cookie *); 53 int ibm561_set_cmap(struct ramdac_cookie *, struct wsdisplay_cmap *); 54 int ibm561_get_cmap(struct ramdac_cookie *, struct wsdisplay_cmap *); 55 int ibm561_set_cursor(struct ramdac_cookie *, struct wsdisplay_cursor *); 56 int ibm561_get_cursor(struct ramdac_cookie *, struct wsdisplay_cursor *); 57 int ibm561_set_curpos(struct ramdac_cookie *, struct wsdisplay_curpos *); 58 int ibm561_get_curpos(struct ramdac_cookie *, struct wsdisplay_curpos *); 59 int ibm561_get_curmax(struct ramdac_cookie *, struct wsdisplay_curpos *); 60 int ibm561_set_dotclock(struct ramdac_cookie *, unsigned); 61 62 /* XXX const */ 63 struct ramdac_funcs ibm561_funcsstruct = { 64 "IBM561", 65 ibm561_register, 66 ibm561_init, 67 ibm561_set_cmap, 68 ibm561_get_cmap, 69 ibm561_set_cursor, 70 ibm561_get_cursor, 71 ibm561_set_curpos, 72 ibm561_get_curpos, 73 ibm561_get_curmax, 74 NULL, /* check_curcmap; not needed */ 75 NULL, /* set_curcmap; not needed */ 76 NULL, /* get_curcmap; not needed */ 77 ibm561_set_dotclock, 78 }; 79 80 /* 81 * Private data. 82 */ 83 struct ibm561data { 84 void *cookie; 85 86 int (*ramdac_sched_update)(void *, void (*)(void *)); 87 void (*ramdac_wr)(void *, u_int, u_int8_t); 88 u_int8_t (*ramdac_rd)(void *, u_int); 89 90 #define CHANGED_CURCMAP 0x0001 /* cursor cmap */ 91 #define CHANGED_CMAP 0x0002 /* color map */ 92 #define CHANGED_WTYPE 0x0004 /* window types */ 93 #define CHANGED_DOTCLOCK 0x0008 /* dot clock */ 94 #define CHANGED_ALL 0x000f /* or of all above */ 95 u_int8_t changed; 96 97 /* dotclock parameters */ 98 u_int8_t vco_div; 99 u_int8_t pll_ref; 100 u_int8_t div_dotclock; 101 102 /* colormaps et al. */ 103 u_int8_t curcmap_r[2]; 104 u_int8_t curcmap_g[2]; 105 u_int8_t curcmap_b[2]; 106 107 u_int8_t cmap_r[IBM561_NCMAP_ENTRIES]; 108 u_int8_t cmap_g[IBM561_NCMAP_ENTRIES]; 109 u_int8_t cmap_b[IBM561_NCMAP_ENTRIES]; 110 111 u_int16_t gamma_r[IBM561_NGAMMA_ENTRIES]; 112 u_int16_t gamma_g[IBM561_NGAMMA_ENTRIES]; 113 u_int16_t gamma_b[IBM561_NGAMMA_ENTRIES]; 114 115 u_int16_t wtype[IBM561_NWTYPES]; 116 }; 117 118 /* 119 * private functions 120 */ 121 void ibm561_update(void *); 122 static void ibm561_load_cmap(struct ibm561data *); 123 static void ibm561_load_dotclock(struct ibm561data *); 124 static void ibm561_regbegin(struct ibm561data *, u_int16_t); 125 static void ibm561_regcont(struct ibm561data *, u_int16_t, u_int8_t); 126 static void ibm561_regcont10bit(struct ibm561data *, u_int16_t, u_int16_t); 127 static void ibm561_regwr(struct ibm561data *, u_int16_t, u_int8_t); 128 129 struct ramdac_funcs * 130 ibm561_funcs(void) 131 { 132 return &ibm561_funcsstruct; 133 } 134 135 struct ramdac_cookie * 136 ibm561_register( 137 void *v, 138 int (*sched_update)(void *, void (*)(void *)), 139 void (*wr)(void *, u_int, u_int8_t), 140 u_int8_t (*rd)(void *, u_int)) 141 { 142 struct ibm561data *data; 143 144 data = kmem_zalloc(sizeof *data, KM_SLEEP); 145 data->cookie = v; 146 data->ramdac_sched_update = sched_update; 147 data->ramdac_wr = wr; 148 data->ramdac_rd = rd; 149 return (struct ramdac_cookie *)data; 150 } 151 152 /* 153 * This function exists solely to provide a means to init 154 * the RAMDAC without first registering. It is useful for 155 * initializing the console early on. 156 */ 157 158 static struct ibm561data saved_console_data; 159 160 void 161 ibm561_cninit( 162 void *v, 163 int (*sched_update)(void *, void (*)(void *)), 164 void (*wr)(void *, u_int, u_int8_t), 165 u_int8_t (*rd)(void *, u_int), 166 u_int dotclock) 167 { 168 struct ibm561data *data = &saved_console_data; 169 memset(data, 0x0, sizeof *data); 170 data->cookie = v; 171 data->ramdac_sched_update = sched_update; 172 data->ramdac_wr = wr; 173 data->ramdac_rd = rd; 174 ibm561_set_dotclock((struct ramdac_cookie *)data, dotclock); 175 ibm561_init((struct ramdac_cookie *)data); 176 } 177 178 void 179 ibm561_init(struct ramdac_cookie *rc) 180 { 181 struct ibm561data *data = (struct ibm561data *)rc; 182 int i; 183 184 /* XXX this is _essential_ */ 185 186 ibm561_load_dotclock(data); 187 188 /* XXXrcd: bunch of magic of which I have no current clue */ 189 ibm561_regwr(data, IBM561_CONFIG_REG1, 0x2a); 190 ibm561_regwr(data, IBM561_CONFIG_REG3, 0x41); 191 ibm561_regwr(data, IBM561_CONFIG_REG4, 0x20); 192 193 /* initialize the card a bit */ 194 ibm561_regwr(data, IBM561_SYNC_CNTL, 0x1); 195 ibm561_regwr(data, IBM561_CONFIG_REG2, 0x19); 196 197 ibm561_regwr(data, IBM561_CONFIG_REG1, 0x2a); 198 ibm561_regwr(data, IBM561_CONFIG_REG4, 0x20); 199 200 ibm561_regbegin(data, IBM561_WAT_SEG_REG); 201 ibm561_regcont(data, IBM561_CMD, 0x00); 202 ibm561_regcont(data, IBM561_CMD, 0x00); 203 ibm561_regcont(data, IBM561_CMD, 0x00); 204 ibm561_regcont(data, IBM561_CMD, 0x00); 205 ibm561_regbegin(data, IBM561_CHROMAKEY0); 206 ibm561_regcont(data, IBM561_CMD, 0x00); 207 ibm561_regcont(data, IBM561_CMD, 0x00); 208 ibm561_regcont(data, IBM561_CMD, 0x00); 209 ibm561_regcont(data, IBM561_CMD, 0x00); 210 211 ibm561_regwr(data, IBM561_CURS_CNTL_REG, 0x00); /* XXX off? */ 212 213 /* cursor `hot spot' registers */ 214 ibm561_regbegin(data, IBM561_HOTSPOT_REG); 215 ibm561_regcont(data, IBM561_CMD, 0x00); 216 ibm561_regcont(data, IBM561_CMD, 0x00); 217 ibm561_regcont(data, IBM561_CMD, 0xff); 218 ibm561_regcont(data, IBM561_CMD, 0x00); 219 ibm561_regcont(data, IBM561_CMD, 0xff); 220 ibm561_regcont(data, IBM561_CMD, 0x00); 221 222 /* VRAM Mask Registers (diagnostics) */ 223 ibm561_regbegin(data, IBM561_VRAM_MASK_REG); 224 ibm561_regcont(data, IBM561_CMD, 0xff); 225 ibm561_regcont(data, IBM561_CMD, 0xff); 226 ibm561_regcont(data, IBM561_CMD, 0xff); 227 ibm561_regcont(data, IBM561_CMD, 0xff); 228 ibm561_regcont(data, IBM561_CMD, 0xff); 229 ibm561_regcont(data, IBM561_CMD, 0xff); 230 ibm561_regcont(data, IBM561_CMD, 0xff); 231 232 /* let's set up some decent default colour maps and gammas */ 233 for (i=0; i < IBM561_NCMAP_ENTRIES; i++) 234 data->cmap_r[i] = data->cmap_g[i] = data->cmap_b[i] = 0xff; 235 data->cmap_r[0] = data->cmap_g[0] = data->cmap_b[0] = 0x00; 236 data->cmap_r[256] = data->cmap_g[256] = data->cmap_b[256] = 0x00; 237 data->cmap_r[512] = data->cmap_g[512] = data->cmap_b[512] = 0x00; 238 data->cmap_r[768] = data->cmap_g[768] = data->cmap_b[768] = 0x00; 239 240 data->gamma_r[0] = data->gamma_g[0] = data->gamma_b[0] = 0x00; 241 for (i=0; i < IBM561_NGAMMA_ENTRIES; i++) 242 data->gamma_r[i] = data->gamma_g[i] = data->gamma_b[i] = 0xff; 243 244 for (i=0; i < IBM561_NWTYPES; i++) 245 data->wtype[i] = 0x0036; 246 data->wtype[1] = 0x0028; 247 248 /* the last step: */ 249 data->changed = CHANGED_ALL; 250 data->ramdac_sched_update(data->cookie, ibm561_update); 251 } 252 253 int 254 ibm561_set_cmap(struct ramdac_cookie *rc, struct wsdisplay_cmap *cmapp) 255 { 256 struct ibm561data *data = (struct ibm561data *)rc; 257 u_int count, index; 258 uint8_t *cmap_entries, *r, *g, *b; 259 int s, error; 260 261 if (cmapp->index >= IBM561_NCMAP_ENTRIES || 262 cmapp->count > IBM561_NCMAP_ENTRIES - cmapp->index) 263 return (EINVAL); 264 265 cmap_entries = kmem_alloc(IBM561_NCMAP_ENTRIES * 3, KM_SLEEP); 266 r = &cmap_entries[0 * IBM561_NCMAP_ENTRIES]; 267 g = &cmap_entries[1 * IBM561_NCMAP_ENTRIES]; 268 b = &cmap_entries[2 * IBM561_NCMAP_ENTRIES]; 269 270 index = cmapp->index; 271 count = cmapp->count; 272 error = copyin(cmapp->red, &r[index], count); 273 if (error) 274 goto out; 275 error = copyin(cmapp->green, &g[index], count); 276 if (error) 277 goto out; 278 error = copyin(cmapp->blue, &b[index], count); 279 if (error) 280 goto out; 281 282 s = spltty(); 283 memcpy(&data->cmap_r[index], &r[index], count); 284 memcpy(&data->cmap_g[index], &g[index], count); 285 memcpy(&data->cmap_b[index], &b[index], count); 286 data->changed |= CHANGED_CMAP; 287 data->ramdac_sched_update(data->cookie, ibm561_update); 288 splx(s); 289 290 out: 291 kmem_free(cmap_entries, IBM561_NCMAP_ENTRIES * 3); 292 return (error); 293 } 294 295 int 296 ibm561_get_cmap(struct ramdac_cookie *rc, struct wsdisplay_cmap *cmapp) 297 { 298 struct ibm561data *data = (struct ibm561data *)rc; 299 u_int count, index; 300 int error; 301 302 if (cmapp->index >= IBM561_NCMAP_ENTRIES || 303 cmapp->count > IBM561_NCMAP_ENTRIES - cmapp->index) 304 return (EINVAL); 305 count = cmapp->count; 306 index = cmapp->index; 307 error = copyout(&data->cmap_r[index], cmapp->red, count); 308 if (error) 309 return (error); 310 error = copyout(&data->cmap_g[index], cmapp->green, count); 311 if (error) 312 return (error); 313 error = copyout(&data->cmap_b[index], cmapp->blue, count); 314 return (error); 315 } 316 317 /* 318 * XXX: 319 * I am leaving these functions returning EINVAL, as they are 320 * not strictly necessary for the correct functioning of the 321 * card and in fact are not used on the other TGA variants, except 322 * they are exported via ioctl(2) to userland, which does not in 323 * fact use them. 324 */ 325 326 int 327 ibm561_set_cursor(struct ramdac_cookie *rc, struct wsdisplay_cursor *cursorp) 328 { 329 return EINVAL; 330 } 331 332 int 333 ibm561_get_cursor(struct ramdac_cookie *rc, struct wsdisplay_cursor *cursorp) 334 { 335 return EINVAL; 336 } 337 338 int 339 ibm561_set_curpos(struct ramdac_cookie *rc, struct wsdisplay_curpos *curposp) 340 { 341 return EINVAL; 342 } 343 344 int 345 ibm561_get_curpos(struct ramdac_cookie *rc, struct wsdisplay_curpos *curposp) 346 { 347 return EINVAL; 348 } 349 350 int 351 ibm561_get_curmax(struct ramdac_cookie *rc, struct wsdisplay_curpos *curposp) 352 { 353 return EINVAL; 354 } 355 356 int 357 ibm561_set_dotclock(struct ramdac_cookie *rc, unsigned dotclock) 358 { 359 struct ibm561data *data = (struct ibm561data *)rc; 360 361 /* XXXrcd: a couple of these are a little hazy, vis a vis 362 * check 175MHz and 202MHz, which are wrong... 363 */ 364 switch (dotclock) { 365 case 25175000: data->vco_div = 0x3e; data->pll_ref = 0x09; break; 366 case 31500000: data->vco_div = 0x17; data->pll_ref = 0x05; break; 367 case 40000000: data->vco_div = 0x42; data->pll_ref = 0x06; break; 368 case 50000000: data->vco_div = 0x45; data->pll_ref = 0x05; break; 369 case 65000000: data->vco_div = 0xac; data->pll_ref = 0x0c; break; 370 case 69000000: data->vco_div = 0xa9; data->pll_ref = 0x0b; break; 371 case 74000000: data->vco_div = 0x9c; data->pll_ref = 0x09; break; 372 case 75000000: data->vco_div = 0x93; data->pll_ref = 0x08; break; 373 case 103994000: data->vco_div = 0x96; data->pll_ref = 0x06; break; 374 case 108180000: data->vco_div = 0xb8; data->pll_ref = 0x08; break; 375 case 110000000: data->vco_div = 0xba; data->pll_ref = 0x08; break; 376 case 119840000: data->vco_div = 0x82; data->pll_ref = 0x04; break; 377 case 130808000: data->vco_div = 0xc8; data->pll_ref = 0x08; break; 378 case 135000000: data->vco_div = 0xc1; data->pll_ref = 0x07; break; 379 case 175000000: data->vco_div = 0xe2; data->pll_ref = 0x07; break; 380 case 202500000: data->vco_div = 0xe2; data->pll_ref = 0x07; break; 381 default: 382 return EINVAL; 383 } 384 385 data->div_dotclock = 0xb0; 386 data->changed |= CHANGED_DOTCLOCK; 387 return 0; 388 } 389 390 /* 391 * Internal Functions 392 */ 393 394 void 395 ibm561_update(void *vp) 396 { 397 struct ibm561data *data = (struct ibm561data *)vp; 398 int i; 399 400 /* XXX see comment above ibm561_cninit() */ 401 if (!data) 402 data = &saved_console_data; 403 404 if (data->changed & CHANGED_WTYPE) { 405 ibm561_regbegin(data, IBM561_FB_WINTYPE); 406 for (i=0; i < IBM561_NWTYPES; i++) 407 ibm561_regcont10bit(data, IBM561_CMD_FB_WAT, data->wtype[i]); 408 409 /* XXXrcd: quick hack here for AUX FB table */ 410 ibm561_regbegin(data, IBM561_AUXFB_WINTYPE); 411 for (i=0; i < IBM561_NWTYPES; i++) 412 ibm561_regcont(data, IBM561_CMD, 0x04); 413 414 /* XXXrcd: quick hack here for OL WAT table */ 415 ibm561_regbegin(data, IBM561_OL_WINTYPE); 416 for (i=0; i < IBM561_NWTYPES; i++) 417 ibm561_regcont10bit(data, IBM561_CMD_FB_WAT, 0x0231); 418 419 /* XXXrcd: quick hack here for AUX OL WAT table */ 420 ibm561_regbegin(data, IBM561_AUXOL_WINTYPE); 421 for (i=0; i < IBM561_NWTYPES; i++) 422 ibm561_regcont(data, IBM561_CMD, 0x0c); 423 } 424 425 if (data->changed & CHANGED_CMAP) 426 ibm561_load_cmap(data); 427 428 /* XXX: I am not sure in what situations it is safe to 429 * change the dotclock---hope this is good. 430 */ 431 if (data->changed & CHANGED_DOTCLOCK) 432 ibm561_load_dotclock(data); 433 } 434 435 static void 436 ibm561_load_cmap(struct ibm561data *data) 437 { 438 int i; 439 440 ibm561_regbegin(data, IBM561_CMAP_TABLE); 441 for (i=0; i < IBM561_NCMAP_ENTRIES; i++) { 442 ibm561_regcont(data, IBM561_CMD_CMAP, data->cmap_r[i]); 443 ibm561_regcont(data, IBM561_CMD_CMAP, data->cmap_g[i]); 444 ibm561_regcont(data, IBM561_CMD_CMAP, data->cmap_b[i]); 445 } 446 447 ibm561_regbegin(data, IBM561_RED_GAMMA_TABLE); 448 for (i=0; i < 256; i++) 449 ibm561_regcont10bit(data, IBM561_CMD_GAMMA, data->gamma_r[i]); 450 451 ibm561_regbegin(data, IBM561_GREEN_GAMMA_TABLE); 452 for (i=1; i < 256; i++) 453 ibm561_regcont10bit(data, IBM561_CMD_GAMMA, data->gamma_g[i]); 454 455 ibm561_regbegin(data, IBM561_BLUE_GAMMA_TABLE); 456 for (i=1; i < 256; i++) 457 ibm561_regcont10bit(data, IBM561_CMD_GAMMA, data->gamma_b[i]); 458 459 } 460 461 static void 462 ibm561_load_dotclock(struct ibm561data *data) 463 { 464 /* XXX 465 * we should probably be more pro-active here, but it shouldn't 466 * actually happen... 467 */ 468 if (!data->vco_div || !data->pll_ref || ! data->div_dotclock) { 469 panic("ibm561_load_dotclock: called uninitialized"); 470 } 471 472 ibm561_regwr(data, IBM561_PLL_VCO_DIV, data->vco_div); 473 ibm561_regwr(data, IBM561_PLL_REF_REG, data->pll_ref); 474 ibm561_regwr(data, IBM561_DIV_DOTCLCK, data->div_dotclock); 475 } 476 477 static void 478 ibm561_regcont10bit(struct ibm561data *data, u_int16_t reg, u_int16_t val) 479 { 480 data->ramdac_wr(data->cookie, IBM561_CMD_GAMMA, (val >> 2) & 0xff); 481 data->ramdac_wr(data->cookie, IBM561_CMD_GAMMA, (val & 0x3) << 6); 482 } 483 484 static void 485 ibm561_regbegin(struct ibm561data *data, u_int16_t reg) 486 { 487 data->ramdac_wr(data->cookie, IBM561_ADDR_LOW, reg & 0xff); 488 data->ramdac_wr(data->cookie, IBM561_ADDR_HIGH, (reg >> 8) & 0xff); 489 } 490 491 static void 492 ibm561_regcont(struct ibm561data *data, u_int16_t reg, u_int8_t val) 493 { 494 data->ramdac_wr(data->cookie, reg, val); 495 } 496 497 static void 498 ibm561_regwr(struct ibm561data *data, u_int16_t reg, u_int8_t val) 499 { 500 ibm561_regbegin(data, reg); 501 ibm561_regcont(data, IBM561_CMD, val); 502 }
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