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newport_con.c
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linux-6.19.14/drivers/video/console/newport_con.c
1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * newport_con.c: Abscon for newport hardware 4 * 5 * (C) 1998 Thomas Bogendoerfer (tsbogend@alpha.franken.de) 6 * (C) 1999 Ulf Carlsson (ulfc@thepuffingruop.com) 7 * 8 * This driver is based on sgicons.c and cons_newport. 9 * 10 * Copyright (C) 1996 David S. Miller (davem@davemloft.net) 11 * Copyright (C) 1997 Miguel de Icaza (miguel@nuclecu.unam.mx) 12 */ 13#include <linux/init.h> 14#include <linux/kernel.h> 15#include <linux/errno.h> 16#include <linux/kd.h> 17#include <linux/selection.h> 18#include <linux/console.h> 19#include <linux/vt_kern.h> 20#include <linux/mm.h> 21#include <linux/module.h> 22#include <linux/slab.h> 23 24#include <asm/io.h> 25#include <linux/uaccess.h> 26#include <asm/page.h> 27#include <asm/gio_device.h> 28 29#include <video/newport.h> 30 31#include <linux/linux_logo.h> 32#include <linux/font.h> 33 34#define NEWPORT_LEN 0x10000 35 36#define FONT_DATA ((unsigned char *)font_vga_8x16.data) 37 38static unsigned char *font_data[MAX_NR_CONSOLES]; 39 40static struct newport_regs *npregs; 41static unsigned long newport_addr; 42 43static int logo_active; 44static int topscan; 45static int xcurs_correction = 29; 46static int newport_xsize; 47static int newport_ysize; 48static int newport_has_init; 49 50static int newport_set_def_font(int unit, struct console_font *op); 51 52#define BMASK(c) (c << 24) 53 54#define RENDER(regs, cp) do { \ 55(regs)->go.zpattern = BMASK((cp)[0x0]); (regs)->go.zpattern = BMASK((cp)[0x1]); \ 56(regs)->go.zpattern = BMASK((cp)[0x2]); (regs)->go.zpattern = BMASK((cp)[0x3]); \ 57(regs)->go.zpattern = BMASK((cp)[0x4]); (regs)->go.zpattern = BMASK((cp)[0x5]); \ 58(regs)->go.zpattern = BMASK((cp)[0x6]); (regs)->go.zpattern = BMASK((cp)[0x7]); \ 59(regs)->go.zpattern = BMASK((cp)[0x8]); (regs)->go.zpattern = BMASK((cp)[0x9]); \ 60(regs)->go.zpattern = BMASK((cp)[0xa]); (regs)->go.zpattern = BMASK((cp)[0xb]); \ 61(regs)->go.zpattern = BMASK((cp)[0xc]); (regs)->go.zpattern = BMASK((cp)[0xd]); \ 62(regs)->go.zpattern = BMASK((cp)[0xe]); (regs)->go.zpattern = BMASK((cp)[0xf]); \ 63} while(0) 64 65#define TESTVAL 0xdeadbeef 66#define XSTI_TO_FXSTART(val) (((val) & 0xffff) << 11) 67 68static inline void newport_render_background(int xstart, int ystart, 69 int xend, int yend, int ci) 70{ 71 newport_wait(npregs); 72 npregs->set.wrmask = 0xffffffff; 73 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK | 74 NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX 75 | NPORT_DMODE0_STOPY); 76 npregs->set.colori = ci; 77 npregs->set.xystarti = 78 (xstart << 16) | ((ystart + topscan) & 0x3ff); 79 npregs->go.xyendi = 80 ((xend + 7) << 16) | ((yend + topscan + 15) & 0x3ff); 81} 82 83static inline void newport_init_cmap(void) 84{ 85 unsigned short i; 86 87 for (i = 0; i < 16; i++) { 88 newport_bfwait(npregs); 89 newport_cmap_setaddr(npregs, color_table[i]); 90 newport_cmap_setrgb(npregs, 91 default_red[i], 92 default_grn[i], default_blu[i]); 93 } 94} 95 96static const struct linux_logo *newport_show_logo(void) 97{ 98#ifdef CONFIG_LOGO_SGI_CLUT224 99 const struct linux_logo *logo = fb_find_logo(8); 100 const unsigned char *clut; 101 const unsigned char *data; 102 unsigned long i; 103 104 if (!logo) 105 return NULL; 106 clut = logo->clut; 107 data = logo->data; 108 109 for (i = 0; i < logo->clutsize; i++) { 110 newport_bfwait(npregs); 111 newport_cmap_setaddr(npregs, i + 0x20); 112 newport_cmap_setrgb(npregs, clut[0], clut[1], clut[2]); 113 clut += 3; 114 } 115 116 newport_wait(npregs); 117 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK | 118 NPORT_DMODE0_CHOST); 119 120 npregs->set.xystarti = ((newport_xsize - logo->width) << 16) | (0); 121 npregs->set.xyendi = ((newport_xsize - 1) << 16); 122 newport_wait(npregs); 123 124 for (i = 0; i < logo->width*logo->height; i++) 125 npregs->go.hostrw0 = *data++ << 24; 126 127 return logo; 128#else 129 return NULL; 130#endif /* CONFIG_LOGO_SGI_CLUT224 */ 131} 132 133static inline void newport_clear_screen(int xstart, int ystart, int xend, 134 int yend, int ci) 135{ 136 if (logo_active) 137 return; 138 139 newport_wait(npregs); 140 npregs->set.wrmask = 0xffffffff; 141 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK | 142 NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX 143 | NPORT_DMODE0_STOPY); 144 npregs->set.colori = ci; 145 npregs->set.xystarti = (xstart << 16) | ystart; 146 npregs->go.xyendi = (xend << 16) | yend; 147} 148 149static inline void newport_clear_lines(int ystart, int yend, int ci) 150{ 151 ystart = ((ystart << 4) + topscan) & 0x3ff; 152 yend = ((yend << 4) + topscan + 15) & 0x3ff; 153 newport_clear_screen(0, ystart, 1280 + 63, yend, ci); 154} 155 156static void newport_reset(void) 157{ 158 unsigned short treg; 159 int i; 160 161 newport_wait(npregs); 162 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL); 163 newport_vc2_set(npregs, VC2_IREG_CONTROL, 164 (treg | VC2_CTRL_EVIDEO)); 165 166 treg = newport_vc2_get(npregs, VC2_IREG_CENTRY); 167 newport_vc2_set(npregs, VC2_IREG_RADDR, treg); 168 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM | 169 NPORT_DMODE_W2 | VC2_PROTOCOL); 170 for (i = 0; i < 128; i++) { 171 newport_bfwait(npregs); 172 if (i == 92 || i == 94) 173 npregs->set.dcbdata0.byshort.s1 = 0xff00; 174 else 175 npregs->set.dcbdata0.byshort.s1 = 0x0000; 176 } 177 178 newport_init_cmap(); 179 180 /* turn off popup plane */ 181 npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL | 182 XM9_CRS_CONFIG | NPORT_DMODE_W1); 183 npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE; 184 npregs->set.dcbmode = (DCB_XMAP1 | R_DCB_XMAP9_PROTOCOL | 185 XM9_CRS_CONFIG | NPORT_DMODE_W1); 186 npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE; 187 188 topscan = 0; 189 npregs->cset.topscan = 0x3ff; 190 npregs->cset.xywin = (4096 << 16) | 4096; 191 192 /* Clear the screen. */ 193 newport_clear_screen(0, 0, 1280 + 63, 1024, 0); 194} 195 196/* 197 * calculate the actual screen size by reading 198 * the video timing out of the VC2 199 */ 200static void newport_get_screensize(void) 201{ 202 int i, cols; 203 unsigned short ventry, treg; 204 unsigned short linetable[128]; /* should be enough */ 205 206 ventry = newport_vc2_get(npregs, VC2_IREG_VENTRY); 207 newport_vc2_set(npregs, VC2_IREG_RADDR, ventry); 208 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM | 209 NPORT_DMODE_W2 | VC2_PROTOCOL); 210 for (i = 0; i < 128; i++) { 211 newport_bfwait(npregs); 212 linetable[i] = npregs->set.dcbdata0.byshort.s1; 213 } 214 215 newport_xsize = newport_ysize = 0; 216 for (i = 0; i < ARRAY_SIZE(linetable) - 1 && linetable[i + 1]; i += 2) { 217 cols = 0; 218 newport_vc2_set(npregs, VC2_IREG_RADDR, linetable[i]); 219 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM | 220 NPORT_DMODE_W2 | VC2_PROTOCOL); 221 do { 222 newport_bfwait(npregs); 223 treg = npregs->set.dcbdata0.byshort.s1; 224 if ((treg & 1) == 0) 225 cols += (treg >> 7) & 0xfe; 226 if ((treg & 0x80) == 0) { 227 newport_bfwait(npregs); 228 treg = npregs->set.dcbdata0.byshort.s1; 229 } 230 } while ((treg & 0x8000) == 0); 231 if (cols) { 232 if (cols > newport_xsize) 233 newport_xsize = cols; 234 newport_ysize += linetable[i + 1]; 235 } 236 } 237 printk("NG1: Screensize %dx%d\n", newport_xsize, newport_ysize); 238} 239 240static void newport_get_revisions(void) 241{ 242 unsigned int tmp; 243 unsigned int board_rev; 244 unsigned int rex3_rev; 245 unsigned int vc2_rev; 246 unsigned int cmap_rev; 247 unsigned int xmap9_rev; 248 unsigned int bt445_rev; 249 unsigned int bitplanes; 250 251 rex3_rev = npregs->cset.status & NPORT_STAT_VERS; 252 253 npregs->set.dcbmode = (DCB_CMAP0 | NCMAP_PROTOCOL | 254 NCMAP_REGADDR_RREG | NPORT_DMODE_W1); 255 tmp = npregs->set.dcbdata0.bybytes.b3; 256 cmap_rev = tmp & 7; 257 board_rev = (tmp >> 4) & 7; 258 bitplanes = ((board_rev > 1) && (tmp & 0x80)) ? 8 : 24; 259 260 npregs->set.dcbmode = (DCB_CMAP1 | NCMAP_PROTOCOL | 261 NCMAP_REGADDR_RREG | NPORT_DMODE_W1); 262 tmp = npregs->set.dcbdata0.bybytes.b3; 263 if ((tmp & 7) < cmap_rev) 264 cmap_rev = (tmp & 7); 265 266 vc2_rev = (newport_vc2_get(npregs, VC2_IREG_CONFIG) >> 5) & 7; 267 268 npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL | 269 XM9_CRS_REVISION | NPORT_DMODE_W1); 270 xmap9_rev = npregs->set.dcbdata0.bybytes.b3 & 7; 271 272 npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL | 273 BT445_CSR_ADDR_REG | NPORT_DMODE_W1); 274 npregs->set.dcbdata0.bybytes.b3 = BT445_REVISION_REG; 275 npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL | 276 BT445_CSR_REVISION | NPORT_DMODE_W1); 277 bt445_rev = (npregs->set.dcbdata0.bybytes.b3 >> 4) - 0x0a; 278 279#define L(a) (char)('A'+(a)) 280 printk 281 ("NG1: Revision %d, %d bitplanes, REX3 revision %c, VC2 revision %c, xmap9 revision %c, cmap revision %c, bt445 revision %c\n", 282 board_rev, bitplanes, L(rex3_rev), L(vc2_rev), L(xmap9_rev), 283 L(cmap_rev ? (cmap_rev + 1) : 0), L(bt445_rev)); 284#undef L 285 286 if (board_rev == 3) /* I don't know all affected revisions */ 287 xcurs_correction = 21; 288} 289 290static void newport_exit(void) 291{ 292 int i; 293 294 /* free memory used by user font */ 295 for (i = 0; i < MAX_NR_CONSOLES; i++) 296 newport_set_def_font(i, NULL); 297} 298 299/* Can't be __init, do_take_over_console may call it later */ 300static const char *newport_startup(void) 301{ 302 int i; 303 304 npregs->cset.config = NPORT_CFG_GD0; 305 306 if (newport_wait(npregs)) 307 goto out_unmap; 308 309 npregs->set.xstarti = TESTVAL; 310 if (npregs->set._xstart.word != XSTI_TO_FXSTART(TESTVAL)) 311 goto out_unmap; 312 313 for (i = 0; i < MAX_NR_CONSOLES; i++) 314 font_data[i] = FONT_DATA; 315 316 newport_reset(); 317 newport_get_revisions(); 318 newport_get_screensize(); 319 newport_has_init = 1; 320 321 return "SGI Newport"; 322 323out_unmap: 324 return NULL; 325} 326 327static void newport_init(struct vc_data *vc, bool init) 328{ 329 int cols, rows; 330 331 cols = newport_xsize / 8; 332 rows = newport_ysize / 16; 333 vc->vc_can_do_color = 1; 334 if (init) { 335 vc->vc_cols = cols; 336 vc->vc_rows = rows; 337 } else 338 vc_resize(vc, cols, rows); 339} 340 341static void newport_deinit(struct vc_data *c) 342{ 343 if (!con_is_bound(&newport_con) && newport_has_init) { 344 newport_exit(); 345 newport_has_init = 0; 346 } 347} 348 349static void newport_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, 350 unsigned int width) 351{ 352 int xend = ((sx + width) << 3) - 1; 353 int ystart = ((sy << 4) + topscan) & 0x3ff; 354 int yend = (((sy + 1) << 4) + topscan - 1) & 0x3ff; 355 356 if (logo_active) 357 return; 358 359 if (ystart < yend) { 360 newport_clear_screen(sx << 3, ystart, xend, yend, 361 (vc->state.color & 0xf0) >> 4); 362 } else { 363 newport_clear_screen(sx << 3, ystart, xend, 1023, 364 (vc->state.color & 0xf0) >> 4); 365 newport_clear_screen(sx << 3, 0, xend, yend, 366 (vc->state.color & 0xf0) >> 4); 367 } 368} 369 370static void newport_putc(struct vc_data *vc, u16 charattr, unsigned int ypos, 371 unsigned int xpos) 372{ 373 unsigned char *p; 374 375 p = &font_data[vc->vc_num][(charattr & 0xff) << 4]; 376 charattr = (charattr >> 8) & 0xff; 377 xpos <<= 3; 378 ypos <<= 4; 379 380 newport_render_background(xpos, ypos, xpos, ypos, 381 (charattr & 0xf0) >> 4); 382 383 /* Set the color and drawing mode. */ 384 newport_wait(npregs); 385 npregs->set.colori = charattr & 0xf; 386 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK | 387 NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB | 388 NPORT_DMODE0_L32); 389 390 /* Set coordinates for bitmap operation. */ 391 npregs->set.xystarti = (xpos << 16) | ((ypos + topscan) & 0x3ff); 392 npregs->set.xyendi = ((xpos + 7) << 16); 393 newport_wait(npregs); 394 395 /* Go, baby, go... */ 396 RENDER(npregs, p); 397} 398 399static void newport_putcs(struct vc_data *vc, const u16 *s, 400 unsigned int count, unsigned int ypos, 401 unsigned int xpos) 402{ 403 unsigned char *p; 404 unsigned int i; 405 u16 charattr; 406 407 charattr = (scr_readw(s) >> 8) & 0xff; 408 409 xpos <<= 3; 410 ypos <<= 4; 411 412 if (!logo_active) 413 /* Clear the area behing the string */ 414 newport_render_background(xpos, ypos, 415 xpos + ((count - 1) << 3), ypos, 416 (charattr & 0xf0) >> 4); 417 418 newport_wait(npregs); 419 420 /* Set the color and drawing mode. */ 421 npregs->set.colori = charattr & 0xf; 422 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK | 423 NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB | 424 NPORT_DMODE0_L32); 425 426 for (i = 0; i < count; i++, xpos += 8) { 427 p = &font_data[vc->vc_num][(scr_readw(s++) & 0xff) << 4]; 428 429 newport_wait(npregs); 430 431 /* Set coordinates for bitmap operation. */ 432 npregs->set.xystarti = 433 (xpos << 16) | ((ypos + topscan) & 0x3ff); 434 npregs->set.xyendi = ((xpos + 7) << 16); 435 436 /* Go, baby, go... */ 437 RENDER(npregs, p); 438 } 439} 440 441static void newport_cursor(struct vc_data *vc, bool enable) 442{ 443 unsigned short treg; 444 int xcurs, ycurs; 445 446 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL); 447 448 if (!enable) { 449 newport_vc2_set(npregs, VC2_IREG_CONTROL, 450 (treg & ~(VC2_CTRL_ECDISP))); 451 return; 452 } 453 454 newport_vc2_set(npregs, VC2_IREG_CONTROL, (treg | VC2_CTRL_ECDISP)); 455 xcurs = (vc->vc_pos - vc->vc_visible_origin) / 2; 456 ycurs = ((xcurs / vc->vc_cols) << 4) + 31; 457 xcurs = ((xcurs % vc->vc_cols) << 3) + xcurs_correction; 458 newport_vc2_set(npregs, VC2_IREG_CURSX, xcurs); 459 newport_vc2_set(npregs, VC2_IREG_CURSY, ycurs); 460} 461 462static bool newport_switch(struct vc_data *vc) 463{ 464 static int logo_drawn = 0; 465 466 topscan = 0; 467 npregs->cset.topscan = 0x3ff; 468 469 if (!logo_drawn) { 470 if (newport_show_logo()) { 471 logo_drawn = 1; 472 logo_active = 1; 473 } 474 } 475 476 return true; 477} 478 479static bool newport_blank(struct vc_data *c, enum vesa_blank_mode blank, 480 bool mode_switch) 481{ 482 unsigned short treg; 483 484 if (blank == VESA_NO_BLANKING) { 485 /* unblank console */ 486 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL); 487 newport_vc2_set(npregs, VC2_IREG_CONTROL, 488 (treg | VC2_CTRL_EDISP)); 489 } else { 490 /* blank console */ 491 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL); 492 newport_vc2_set(npregs, VC2_IREG_CONTROL, 493 (treg & ~(VC2_CTRL_EDISP))); 494 } 495 496 return true; 497} 498 499static int newport_set_font(int unit, const struct console_font *op, 500 unsigned int vpitch) 501{ 502 int w = op->width; 503 int h = op->height; 504 int size = h * op->charcount; 505 int i; 506 unsigned char *new_data, *data = op->data, *p; 507 508 /* ladis: when I grow up, there will be a day... and more sizes will 509 * be supported ;-) */ 510 if ((w != 8) || (h != 16) || (vpitch != 32) 511 || (op->charcount != 256 && op->charcount != 512)) 512 return -EINVAL; 513 514 if (!(new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, 515 GFP_USER))) return -ENOMEM; 516 517 new_data += FONT_EXTRA_WORDS * sizeof(int); 518 FNTSIZE(new_data) = size; 519 FNTCHARCNT(new_data) = op->charcount; 520 REFCOUNT(new_data) = 0; /* usage counter */ 521 FNTSUM(new_data) = 0; 522 523 p = new_data; 524 for (i = 0; i < op->charcount; i++) { 525 memcpy(p, data, h); 526 data += 32; 527 p += h; 528 } 529 530 /* check if font is already used by other console */ 531 for (i = 0; i < MAX_NR_CONSOLES; i++) { 532 if (font_data[i] != FONT_DATA 533 && FNTSIZE(font_data[i]) == size 534 && !memcmp(font_data[i], new_data, size)) { 535 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int)); 536 /* current font is the same as the new one */ 537 if (i == unit) 538 return 0; 539 new_data = font_data[i]; 540 break; 541 } 542 } 543 /* old font is user font */ 544 if (font_data[unit] != FONT_DATA) { 545 if (--REFCOUNT(font_data[unit]) == 0) 546 kfree(font_data[unit] - 547 FONT_EXTRA_WORDS * sizeof(int)); 548 } 549 REFCOUNT(new_data)++; 550 font_data[unit] = new_data; 551 552 return 0; 553} 554 555static int newport_set_def_font(int unit, struct console_font *op) 556{ 557 if (font_data[unit] != FONT_DATA) { 558 if (--REFCOUNT(font_data[unit]) == 0) 559 kfree(font_data[unit] - 560 FONT_EXTRA_WORDS * sizeof(int)); 561 font_data[unit] = FONT_DATA; 562 } 563 564 return 0; 565} 566 567static int newport_font_default(struct vc_data *vc, struct console_font *op, 568 const char *name) 569{ 570 return newport_set_def_font(vc->vc_num, op); 571} 572 573static int newport_font_set(struct vc_data *vc, const struct console_font *font, 574 unsigned int vpitch, unsigned int flags) 575{ 576 return newport_set_font(vc->vc_num, font, vpitch); 577} 578 579static bool newport_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 580 enum con_scroll dir, unsigned int lines) 581{ 582 int count, x, y; 583 unsigned short *s, *d; 584 unsigned short chattr; 585 586 logo_active = 0; /* it's time to disable the logo now.. */ 587 588 if (t == 0 && b == vc->vc_rows) { 589 if (dir == SM_UP) { 590 topscan = (topscan + (lines << 4)) & 0x3ff; 591 newport_clear_lines(vc->vc_rows - lines, 592 vc->vc_rows - 1, 593 (vc->state.color & 0xf0) >> 4); 594 } else { 595 topscan = (topscan + (-lines << 4)) & 0x3ff; 596 newport_clear_lines(0, lines - 1, 597 (vc->state.color & 0xf0) >> 4); 598 } 599 npregs->cset.topscan = (topscan - 1) & 0x3ff; 600 return false; 601 } 602 603 count = (b - t - lines) * vc->vc_cols; 604 if (dir == SM_UP) { 605 x = 0; 606 y = t; 607 s = (unsigned short *) (vc->vc_origin + 608 vc->vc_size_row * (t + lines)); 609 d = (unsigned short *) (vc->vc_origin + 610 vc->vc_size_row * t); 611 while (count--) { 612 chattr = scr_readw(s++); 613 if (chattr != scr_readw(d)) { 614 newport_putc(vc, chattr, y, x); 615 scr_writew(chattr, d); 616 } 617 d++; 618 if (++x == vc->vc_cols) { 619 x = 0; 620 y++; 621 } 622 } 623 d = (unsigned short *) (vc->vc_origin + 624 vc->vc_size_row * (b - lines)); 625 x = 0; 626 y = b - lines; 627 for (count = 0; count < (lines * vc->vc_cols); count++) { 628 if (scr_readw(d) != vc->vc_video_erase_char) { 629 newport_putc(vc, vc->vc_video_erase_char, 630 y, x); 631 scr_writew(vc->vc_video_erase_char, d); 632 } 633 d++; 634 if (++x == vc->vc_cols) { 635 x = 0; 636 y++; 637 } 638 } 639 } else { 640 x = vc->vc_cols - 1; 641 y = b - 1; 642 s = (unsigned short *) (vc->vc_origin + 643 vc->vc_size_row * (b - lines) - 2); 644 d = (unsigned short *) (vc->vc_origin + 645 vc->vc_size_row * b - 2); 646 while (count--) { 647 chattr = scr_readw(s--); 648 if (chattr != scr_readw(d)) { 649 newport_putc(vc, chattr, y, x); 650 scr_writew(chattr, d); 651 } 652 d--; 653 if (x-- == 0) { 654 x = vc->vc_cols - 1; 655 y--; 656 } 657 } 658 d = (unsigned short *) (vc->vc_origin + 659 vc->vc_size_row * t); 660 x = 0; 661 y = t; 662 for (count = 0; count < (lines * vc->vc_cols); count++) { 663 if (scr_readw(d) != vc->vc_video_erase_char) { 664 newport_putc(vc, vc->vc_video_erase_char, 665 y, x); 666 scr_writew(vc->vc_video_erase_char, d); 667 } 668 d++; 669 if (++x == vc->vc_cols) { 670 x = 0; 671 y++; 672 } 673 } 674 } 675 return true; 676} 677 678static void newport_save_screen(struct vc_data *vc) { } 679 680const struct consw newport_con = { 681 .owner = THIS_MODULE, 682 .con_startup = newport_startup, 683 .con_init = newport_init, 684 .con_deinit = newport_deinit, 685 .con_clear = newport_clear, 686 .con_putc = newport_putc, 687 .con_putcs = newport_putcs, 688 .con_cursor = newport_cursor, 689 .con_scroll = newport_scroll, 690 .con_switch = newport_switch, 691 .con_blank = newport_blank, 692 .con_font_set = newport_font_set, 693 .con_font_default = newport_font_default, 694 .con_save_screen = newport_save_screen 695}; 696 697static int newport_probe(struct gio_device *dev, 698 const struct gio_device_id *id) 699{ 700 int err; 701 702 if (!dev->resource.start) 703 return -EINVAL; 704 705 if (npregs) 706 return -EBUSY; /* we only support one Newport as console */ 707 708 newport_addr = dev->resource.start + 0xF0000; 709 if (!request_mem_region(newport_addr, NEWPORT_LEN, "Newport")) 710 return -ENODEV; 711 712 npregs = (struct newport_regs *)/* ioremap cannot fail */ 713 ioremap(newport_addr, sizeof(struct newport_regs)); 714 console_lock(); 715 err = do_take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1); 716 console_unlock(); 717 718 if (err) { 719 iounmap((void *)npregs); 720 release_mem_region(newport_addr, NEWPORT_LEN); 721 } 722 return err; 723} 724 725static void newport_remove(struct gio_device *dev) 726{ 727 give_up_console(&newport_con); 728 iounmap((void *)npregs); 729 release_mem_region(newport_addr, NEWPORT_LEN); 730} 731 732static struct gio_device_id newport_ids[] = { 733 { .id = 0x7e }, 734 { .id = 0xff } 735}; 736 737MODULE_ALIAS("gio:7e"); 738 739static struct gio_driver newport_driver = { 740 .name = "newport", 741 .id_table = newport_ids, 742 .probe = newport_probe, 743 .remove = newport_remove, 744}; 745module_driver(newport_driver, gio_register_driver, gio_unregister_driver); 746 747MODULE_DESCRIPTION("SGI Newport console driver"); 748MODULE_LICENSE("GPL");
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