1 /* 2 * drivers/video/cirrusfb.c - driver for Cirrus Logic chipsets 3 * 4 * Copyright 1999-2001 Jeff Garzik <jgarzik@pobox.com> 5 * 6 * Contributors (thanks, all!) 7 * 8 * David Eger: 9 * Overhaul for Linux 2.6 10 * 11 * Jeff Rugen: 12 * Major contributions; Motorola PowerStack (PPC and PCI) support, 13 * GD54xx, 1280x1024 mode support, change MCLK based on VCLK. 14 * 15 * Geert Uytterhoeven: 16 * Excellent code review. 17 * 18 * Lars Hecking: 19 * Amiga updates and testing. 20 * 21 * Original cirrusfb author: Frank Neumann 22 * 23 * Based on retz3fb.c and cirrusfb.c: 24 * Copyright (C) 1997 Jes Sorensen 25 * Copyright (C) 1996 Frank Neumann 26 * 27 *************************************************************** 28 * 29 * Format this code with GNU indent '-kr -i8 -pcs' options. 30 * 31 * This file is subject to the terms and conditions of the GNU General Public 32 * License. See the file COPYING in the main directory of this archive 33 * for more details. 34 * 35 */ 36 37 #include <linux/module.h> 38 #include <linux/kernel.h> 39 #include <linux/errno.h> 40 #include <linux/string.h> 41 #include <linux/mm.h> 42 #include <linux/delay.h> 43 #include <linux/fb.h> 44 #include <linux/init.h> 45 46 #ifdef CONFIG_ZORRO 47 #include <linux/zorro.h> 48 #endif 49 #ifdef CONFIG_PCI 50 #include <linux/pci.h> 51 #endif 52 #ifdef CONFIG_AMIGA 53 #include <asm/amigahw.h> 54 #endif 55 56 #include <video/vga.h> 57 #include <video/cirrus.h> 58 59 /***************************************************************** 60 * 61 * debugging and utility macros 62 * 63 */ 64 65 /* disable runtime assertions? */ 66 /* #define CIRRUSFB_NDEBUG */ 67 68 /* debugging assertions */ 69 #ifndef CIRRUSFB_NDEBUG 70 #define assert(expr) \ 71 if (!(expr)) { \ 72 printk("Assertion failed! %s,%s,%s,line=%d\n", \ 73 #expr, __FILE__, __func__, __LINE__); \ 74 } 75 #else 76 #define assert(expr) 77 #endif 78 79 #define MB_ (1024 * 1024) 80 81 /***************************************************************** 82 * 83 * chipset information 84 * 85 */ 86 87 /* board types */ 88 enum cirrus_board { 89 BT_NONE = 0, 90 BT_SD64, /* GD5434 */ 91 BT_PICCOLO, /* GD5426 */ 92 BT_PICASSO, /* GD5426 or GD5428 */ 93 BT_SPECTRUM, /* GD5426 or GD5428 */ 94 BT_PICASSO4, /* GD5446 */ 95 BT_ALPINE, /* GD543x/4x */ 96 BT_GD5480, 97 BT_LAGUNA, /* GD5462/64 */ 98 BT_LAGUNAB, /* GD5465 */ 99 }; 100 101 /* 102 * per-board-type information, used for enumerating and abstracting 103 * chip-specific information 104 * NOTE: MUST be in the same order as enum cirrus_board in order to 105 * use direct indexing on this array 106 * NOTE: '__initdata' cannot be used as some of this info 107 * is required at runtime. Maybe separate into an init-only and 108 * a run-time table? 109 */ 110 static const struct cirrusfb_board_info_rec { 111 char *name; /* ASCII name of chipset */ 112 long maxclock[5]; /* maximum video clock */ 113 /* for 1/4bpp, 8bpp 15/16bpp, 24bpp, 32bpp - numbers from xorg code */ 114 bool init_sr07 : 1; /* init SR07 during init_vgachip() */ 115 bool init_sr1f : 1; /* write SR1F during init_vgachip() */ 116 /* construct bit 19 of screen start address */ 117 bool scrn_start_bit19 : 1; 118 119 /* initial SR07 value, then for each mode */ 120 unsigned char sr07; 121 unsigned char sr07_1bpp; 122 unsigned char sr07_1bpp_mux; 123 unsigned char sr07_8bpp; 124 unsigned char sr07_8bpp_mux; 125 126 unsigned char sr1f; /* SR1F VGA initial register value */ 127 } cirrusfb_board_info[] = { 128 [BT_SD64] = { 129 .name = "CL SD64", 130 .maxclock = { 131 /* guess */ 132 /* the SD64/P4 have a higher max. videoclock */ 133 135100, 135100, 85500, 85500, 0 134 }, 135 .init_sr07 = true, 136 .init_sr1f = true, 137 .scrn_start_bit19 = true, 138 .sr07 = 0xF0, 139 .sr07_1bpp = 0xF0, 140 .sr07_1bpp_mux = 0xF6, 141 .sr07_8bpp = 0xF1, 142 .sr07_8bpp_mux = 0xF7, 143 .sr1f = 0x1E 144 }, 145 [BT_PICCOLO] = { 146 .name = "CL Piccolo", 147 .maxclock = { 148 /* guess */ 149 90000, 90000, 90000, 90000, 90000 150 }, 151 .init_sr07 = true, 152 .init_sr1f = true, 153 .scrn_start_bit19 = false, 154 .sr07 = 0x80, 155 .sr07_1bpp = 0x80, 156 .sr07_8bpp = 0x81, 157 .sr1f = 0x22 158 }, 159 [BT_PICASSO] = { 160 .name = "CL Picasso", 161 .maxclock = { 162 /* guess */ 163 90000, 90000, 90000, 90000, 90000 164 }, 165 .init_sr07 = true, 166 .init_sr1f = true, 167 .scrn_start_bit19 = false, 168 .sr07 = 0x20, 169 .sr07_1bpp = 0x20, 170 .sr07_8bpp = 0x21, 171 .sr1f = 0x22 172 }, 173 [BT_SPECTRUM] = { 174 .name = "CL Spectrum", 175 .maxclock = { 176 /* guess */ 177 90000, 90000, 90000, 90000, 90000 178 }, 179 .init_sr07 = true, 180 .init_sr1f = true, 181 .scrn_start_bit19 = false, 182 .sr07 = 0x80, 183 .sr07_1bpp = 0x80, 184 .sr07_8bpp = 0x81, 185 .sr1f = 0x22 186 }, 187 [BT_PICASSO4] = { 188 .name = "CL Picasso4", 189 .maxclock = { 190 135100, 135100, 85500, 85500, 0 191 }, 192 .init_sr07 = true, 193 .init_sr1f = false, 194 .scrn_start_bit19 = true, 195 .sr07 = 0xA0, 196 .sr07_1bpp = 0xA0, 197 .sr07_1bpp_mux = 0xA6, 198 .sr07_8bpp = 0xA1, 199 .sr07_8bpp_mux = 0xA7, 200 .sr1f = 0 201 }, 202 [BT_ALPINE] = { 203 .name = "CL Alpine", 204 .maxclock = { 205 /* for the GD5430. GD5446 can do more... */ 206 85500, 85500, 50000, 28500, 0 207 }, 208 .init_sr07 = true, 209 .init_sr1f = true, 210 .scrn_start_bit19 = true, 211 .sr07 = 0xA0, 212 .sr07_1bpp = 0xA0, 213 .sr07_1bpp_mux = 0xA6, 214 .sr07_8bpp = 0xA1, 215 .sr07_8bpp_mux = 0xA7, 216 .sr1f = 0x1C 217 }, 218 [BT_GD5480] = { 219 .name = "CL GD5480", 220 .maxclock = { 221 135100, 200000, 200000, 135100, 135100 222 }, 223 .init_sr07 = true, 224 .init_sr1f = true, 225 .scrn_start_bit19 = true, 226 .sr07 = 0x10, 227 .sr07_1bpp = 0x11, 228 .sr07_8bpp = 0x11, 229 .sr1f = 0x1C 230 }, 231 [BT_LAGUNA] = { 232 .name = "CL Laguna", 233 .maxclock = { 234 /* taken from X11 code */ 235 170000, 170000, 170000, 170000, 135100, 236 }, 237 .init_sr07 = false, 238 .init_sr1f = false, 239 .scrn_start_bit19 = true, 240 }, 241 [BT_LAGUNAB] = { 242 .name = "CL Laguna AGP", 243 .maxclock = { 244 /* taken from X11 code */ 245 170000, 250000, 170000, 170000, 135100, 246 }, 247 .init_sr07 = false, 248 .init_sr1f = false, 249 .scrn_start_bit19 = true, 250 } 251 }; 252 253 #ifdef CONFIG_PCI 254 #define CHIP(id, btype) \ 255 { PCI_VENDOR_ID_CIRRUS, id, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (btype) } 256 257 static struct pci_device_id cirrusfb_pci_table[] = { 258 CHIP(PCI_DEVICE_ID_CIRRUS_5436, BT_ALPINE), 259 CHIP(PCI_DEVICE_ID_CIRRUS_5434_8, BT_SD64), 260 CHIP(PCI_DEVICE_ID_CIRRUS_5434_4, BT_SD64), 261 CHIP(PCI_DEVICE_ID_CIRRUS_5430, BT_ALPINE), /* GD-5440 is same id */ 262 CHIP(PCI_DEVICE_ID_CIRRUS_7543, BT_ALPINE), 263 CHIP(PCI_DEVICE_ID_CIRRUS_7548, BT_ALPINE), 264 CHIP(PCI_DEVICE_ID_CIRRUS_5480, BT_GD5480), /* MacPicasso likely */ 265 CHIP(PCI_DEVICE_ID_CIRRUS_5446, BT_PICASSO4), /* Picasso 4 is 5446 */ 266 CHIP(PCI_DEVICE_ID_CIRRUS_5462, BT_LAGUNA), /* CL Laguna */ 267 CHIP(PCI_DEVICE_ID_CIRRUS_5464, BT_LAGUNA), /* CL Laguna 3D */ 268 CHIP(PCI_DEVICE_ID_CIRRUS_5465, BT_LAGUNAB), /* CL Laguna 3DA*/ 269 { 0, } 270 }; 271 MODULE_DEVICE_TABLE(pci, cirrusfb_pci_table); 272 #undef CHIP 273 #endif /* CONFIG_PCI */ 274 275 #ifdef CONFIG_ZORRO 276 struct zorrocl { 277 enum cirrus_board type; /* Board type */ 278 u32 regoffset; /* Offset of registers in first Zorro device */ 279 u32 ramsize; /* Size of video RAM in first Zorro device */ 280 /* If zero, use autoprobe on RAM device */ 281 u32 ramoffset; /* Offset of video RAM in first Zorro device */ 282 zorro_id ramid; /* Zorro ID of RAM device */ 283 zorro_id ramid2; /* Zorro ID of optional second RAM device */ 284 }; 285 286 static const struct zorrocl zcl_sd64 = { 287 .type = BT_SD64, 288 .ramid = ZORRO_PROD_HELFRICH_SD64_RAM, 289 }; 290 291 static const struct zorrocl zcl_piccolo = { 292 .type = BT_PICCOLO, 293 .ramid = ZORRO_PROD_HELFRICH_PICCOLO_RAM, 294 }; 295 296 static const struct zorrocl zcl_picasso = { 297 .type = BT_PICASSO, 298 .ramid = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_II_II_PLUS_RAM, 299 }; 300 301 static const struct zorrocl zcl_spectrum = { 302 .type = BT_SPECTRUM, 303 .ramid = ZORRO_PROD_GVP_EGS_28_24_SPECTRUM_RAM, 304 }; 305 306 static const struct zorrocl zcl_picasso4_z3 = { 307 .type = BT_PICASSO4, 308 .regoffset = 0x00600000, 309 .ramsize = 4 * MB_, 310 .ramoffset = 0x01000000, /* 0x02000000 for 64 MiB boards */ 311 }; 312 313 static const struct zorrocl zcl_picasso4_z2 = { 314 .type = BT_PICASSO4, 315 .regoffset = 0x10000, 316 .ramid = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_IV_Z2_RAM1, 317 .ramid2 = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_IV_Z2_RAM2, 318 }; 319 320 321 static const struct zorro_device_id cirrusfb_zorro_table[] = { 322 { 323 .id = ZORRO_PROD_HELFRICH_SD64_REG, 324 .driver_data = (unsigned long)&zcl_sd64, 325 }, { 326 .id = ZORRO_PROD_HELFRICH_PICCOLO_REG, 327 .driver_data = (unsigned long)&zcl_piccolo, 328 }, { 329 .id = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_II_II_PLUS_REG, 330 .driver_data = (unsigned long)&zcl_picasso, 331 }, { 332 .id = ZORRO_PROD_GVP_EGS_28_24_SPECTRUM_REG, 333 .driver_data = (unsigned long)&zcl_spectrum, 334 }, { 335 .id = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_IV_Z3, 336 .driver_data = (unsigned long)&zcl_picasso4_z3, 337 }, { 338 .id = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_IV_Z2_REG, 339 .driver_data = (unsigned long)&zcl_picasso4_z2, 340 }, 341 { 0 } 342 }; 343 MODULE_DEVICE_TABLE(zorro, cirrusfb_zorro_table); 344 #endif /* CONFIG_ZORRO */ 345 346 #ifdef CIRRUSFB_DEBUG 347 enum cirrusfb_dbg_reg_class { 348 CRT, 349 SEQ 350 }; 351 #endif /* CIRRUSFB_DEBUG */ 352 353 /* info about board */ 354 struct cirrusfb_info { 355 u8 __iomem *regbase; 356 u8 __iomem *laguna_mmio; 357 enum cirrus_board btype; 358 unsigned char SFR; /* Shadow of special function register */ 359 360 int multiplexing; 361 int doubleVCLK; 362 int blank_mode; 363 u32 pseudo_palette[16]; 364 365 void (*unmap)(struct fb_info *info); 366 }; 367 368 static bool noaccel; 369 static char *mode_option = "640x480@60"; 370 371 /****************************************************************************/ 372 /**** BEGIN PROTOTYPES ******************************************************/ 373 374 /*--- Interface used by the world ------------------------------------------*/ 375 static int cirrusfb_pan_display(struct fb_var_screeninfo *var, 376 struct fb_info *info); 377 378 /*--- Internal routines ----------------------------------------------------*/ 379 static void init_vgachip(struct fb_info *info); 380 static void switch_monitor(struct cirrusfb_info *cinfo, int on); 381 static void WGen(const struct cirrusfb_info *cinfo, 382 int regnum, unsigned char val); 383 static unsigned char RGen(const struct cirrusfb_info *cinfo, int regnum); 384 static void AttrOn(const struct cirrusfb_info *cinfo); 385 static void WHDR(const struct cirrusfb_info *cinfo, unsigned char val); 386 static void WSFR(struct cirrusfb_info *cinfo, unsigned char val); 387 static void WSFR2(struct cirrusfb_info *cinfo, unsigned char val); 388 static void WClut(struct cirrusfb_info *cinfo, unsigned char regnum, 389 unsigned char red, unsigned char green, unsigned char blue); 390 #if 0 391 static void RClut(struct cirrusfb_info *cinfo, unsigned char regnum, 392 unsigned char *red, unsigned char *green, 393 unsigned char *blue); 394 #endif 395 static void cirrusfb_WaitBLT(u8 __iomem *regbase); 396 static void cirrusfb_BitBLT(u8 __iomem *regbase, int bits_per_pixel, 397 u_short curx, u_short cury, 398 u_short destx, u_short desty, 399 u_short width, u_short height, 400 u_short line_length); 401 static void cirrusfb_RectFill(u8 __iomem *regbase, int bits_per_pixel, 402 u_short x, u_short y, 403 u_short width, u_short height, 404 u32 fg_color, u32 bg_color, 405 u_short line_length, u_char blitmode); 406 407 static void bestclock(long freq, int *nom, int *den, int *div); 408 409 #ifdef CIRRUSFB_DEBUG 410 static void cirrusfb_dbg_reg_dump(struct fb_info *info, caddr_t regbase); 411 static void cirrusfb_dbg_print_regs(struct fb_info *info, 412 caddr_t regbase, 413 enum cirrusfb_dbg_reg_class reg_class, ...); 414 #endif /* CIRRUSFB_DEBUG */ 415 416 /*** END PROTOTYPES ********************************************************/ 417 /*****************************************************************************/ 418 /*** BEGIN Interface Used by the World ***************************************/ 419 420 static inline int is_laguna(const struct cirrusfb_info *cinfo) 421 { 422 return cinfo->btype == BT_LAGUNA || cinfo->btype == BT_LAGUNAB; 423 } 424 425 static int opencount; 426 427 /*--- Open /dev/fbx ---------------------------------------------------------*/ 428 static int cirrusfb_open(struct fb_info *info, int user) 429 { 430 if (opencount++ == 0) 431 switch_monitor(info->par, 1); 432 return 0; 433 } 434 435 /*--- Close /dev/fbx --------------------------------------------------------*/ 436 static int cirrusfb_release(struct fb_info *info, int user) 437 { 438 if (--opencount == 0) 439 switch_monitor(info->par, 0); 440 return 0; 441 } 442 443 /**** END Interface used by the World *************************************/ 444 /****************************************************************************/ 445 /**** BEGIN Hardware specific Routines **************************************/ 446 447 /* Check if the MCLK is not a better clock source */ 448 static int cirrusfb_check_mclk(struct fb_info *info, long freq) 449 { 450 struct cirrusfb_info *cinfo = info->par; 451 long mclk = vga_rseq(cinfo->regbase, CL_SEQR1F) & 0x3f; 452 453 /* Read MCLK value */ 454 mclk = (14318 * mclk) >> 3; 455 dev_dbg(info->device, "Read MCLK of %ld kHz\n", mclk); 456 457 /* Determine if we should use MCLK instead of VCLK, and if so, what we 458 * should divide it by to get VCLK 459 */ 460 461 if (abs(freq - mclk) < 250) { 462 dev_dbg(info->device, "Using VCLK = MCLK\n"); 463 return 1; 464 } else if (abs(freq - (mclk / 2)) < 250) { 465 dev_dbg(info->device, "Using VCLK = MCLK/2\n"); 466 return 2; 467 } 468 469 return 0; 470 } 471 472 static int cirrusfb_check_pixclock(struct fb_var_screeninfo *var, 473 struct fb_info *info) 474 { 475 long freq; 476 long maxclock; 477 struct cirrusfb_info *cinfo = info->par; 478 unsigned maxclockidx = var->bits_per_pixel >> 3; 479 480 /* convert from ps to kHz */ 481 freq = PICOS2KHZ(var->pixclock ? : 1); 482 483 maxclock = cirrusfb_board_info[cinfo->btype].maxclock[maxclockidx]; 484 cinfo->multiplexing = 0; 485 486 /* If the frequency is greater than we can support, we might be able 487 * to use multiplexing for the video mode */ 488 if (freq > maxclock) { 489 var->pixclock = KHZ2PICOS(maxclock); 490 491 while ((freq = PICOS2KHZ(var->pixclock)) > maxclock) 492 var->pixclock++; 493 } 494 dev_dbg(info->device, "desired pixclock: %ld kHz\n", freq); 495 496 /* 497 * Additional constraint: 8bpp uses DAC clock doubling to allow maximum 498 * pixel clock 499 */ 500 if (var->bits_per_pixel == 8) { 501 switch (cinfo->btype) { 502 case BT_ALPINE: 503 case BT_SD64: 504 case BT_PICASSO4: 505 if (freq > 85500) 506 cinfo->multiplexing = 1; 507 break; 508 case BT_GD5480: 509 if (freq > 135100) 510 cinfo->multiplexing = 1; 511 break; 512 513 default: 514 break; 515 } 516 } 517 518 /* If we have a 1MB 5434, we need to put ourselves in a mode where 519 * the VCLK is double the pixel clock. */ 520 cinfo->doubleVCLK = 0; 521 if (cinfo->btype == BT_SD64 && info->fix.smem_len <= MB_ && 522 var->bits_per_pixel == 16) { 523 cinfo->doubleVCLK = 1; 524 } 525 526 return 0; 527 } 528 529 static int cirrusfb_check_var(struct fb_var_screeninfo *var, 530 struct fb_info *info) 531 { 532 int yres; 533 /* memory size in pixels */ 534 unsigned int pixels; 535 struct cirrusfb_info *cinfo = info->par; 536 537 switch (var->bits_per_pixel) { 538 case 1: 539 var->red.offset = 0; 540 var->red.length = 1; 541 var->green = var->red; 542 var->blue = var->red; 543 break; 544 545 case 8: 546 var->red.offset = 0; 547 var->red.length = 8; 548 var->green = var->red; 549 var->blue = var->red; 550 break; 551 552 case 16: 553 var->red.offset = 11; 554 var->green.offset = 5; 555 var->blue.offset = 0; 556 var->red.length = 5; 557 var->green.length = 6; 558 var->blue.length = 5; 559 break; 560 561 case 24: 562 var->red.offset = 16; 563 var->green.offset = 8; 564 var->blue.offset = 0; 565 var->red.length = 8; 566 var->green.length = 8; 567 var->blue.length = 8; 568 break; 569 570 default: 571 dev_dbg(info->device, 572 "Unsupported bpp size: %d\n", var->bits_per_pixel); 573 return -EINVAL; 574 } 575 576 pixels = info->screen_size * 8 / var->bits_per_pixel; 577 if (var->xres_virtual < var->xres) 578 var->xres_virtual = var->xres; 579 /* use highest possible virtual resolution */ 580 if (var->yres_virtual == -1) { 581 var->yres_virtual = pixels / var->xres_virtual; 582 583 dev_info(info->device, 584 "virtual resolution set to maximum of %dx%d\n", 585 var->xres_virtual, var->yres_virtual); 586 } 587 if (var->yres_virtual < var->yres) 588 var->yres_virtual = var->yres; 589 590 if (var->xres_virtual * var->yres_virtual > pixels) { 591 dev_err(info->device, "mode %dx%dx%d rejected... " 592 "virtual resolution too high to fit into video memory!\n", 593 var->xres_virtual, var->yres_virtual, 594 var->bits_per_pixel); 595 return -EINVAL; 596 } 597 598 /* truncate xoffset and yoffset to maximum if too high */ 599 if (var->xoffset > var->xres_virtual - var->xres) 600 var->xoffset = var->xres_virtual - var->xres - 1; 601 if (var->yoffset > var->yres_virtual - var->yres) 602 var->yoffset = var->yres_virtual - var->yres - 1; 603 604 var->red.msb_right = 605 var->green.msb_right = 606 var->blue.msb_right = 607 var->transp.offset = 608 var->transp.length = 609 var->transp.msb_right = 0; 610 611 yres = var->yres; 612 if (var->vmode & FB_VMODE_DOUBLE) 613 yres *= 2; 614 else if (var->vmode & FB_VMODE_INTERLACED) 615 yres = (yres + 1) / 2; 616 617 if (yres >= 1280) { 618 dev_err(info->device, "ERROR: VerticalTotal >= 1280; " 619 "special treatment required! (TODO)\n"); 620 return -EINVAL; 621 } 622 623 if (cirrusfb_check_pixclock(var, info)) 624 return -EINVAL; 625 626 if (!is_laguna(cinfo)) 627 var->accel_flags = FB_ACCELF_TEXT; 628 629 return 0; 630 } 631 632 static void cirrusfb_set_mclk_as_source(const struct fb_info *info, int div) 633 { 634 struct cirrusfb_info *cinfo = info->par; 635 unsigned char old1f, old1e; 636 637 assert(cinfo != NULL); 638 old1f = vga_rseq(cinfo->regbase, CL_SEQR1F) & ~0x40; 639 640 if (div) { 641 dev_dbg(info->device, "Set %s as pixclock source.\n", 642 (div == 2) ? "MCLK/2" : "MCLK"); 643 old1f |= 0x40; 644 old1e = vga_rseq(cinfo->regbase, CL_SEQR1E) & ~0x1; 645 if (div == 2) 646 old1e |= 1; 647 648 vga_wseq(cinfo->regbase, CL_SEQR1E, old1e); 649 } 650 vga_wseq(cinfo->regbase, CL_SEQR1F, old1f); 651 } 652 653 /************************************************************************* 654 cirrusfb_set_par_foo() 655 656 actually writes the values for a new video mode into the hardware, 657 **************************************************************************/ 658 static int cirrusfb_set_par_foo(struct fb_info *info) 659 { 660 struct cirrusfb_info *cinfo = info->par; 661 struct fb_var_screeninfo *var = &info->var; 662 u8 __iomem *regbase = cinfo->regbase; 663 unsigned char tmp; 664 int pitch; 665 const struct cirrusfb_board_info_rec *bi; 666 int hdispend, hsyncstart, hsyncend, htotal; 667 int yres, vdispend, vsyncstart, vsyncend, vtotal; 668 long freq; 669 int nom, den, div; 670 unsigned int control = 0, format = 0, threshold = 0; 671 672 dev_dbg(info->device, "Requested mode: %dx%dx%d\n", 673 var->xres, var->yres, var->bits_per_pixel); 674 675 switch (var->bits_per_pixel) { 676 case 1: 677 info->fix.line_length = var->xres_virtual / 8; 678 info->fix.visual = FB_VISUAL_MONO10; 679 break; 680 681 case 8: 682 info->fix.line_length = var->xres_virtual; 683 info->fix.visual = FB_VISUAL_PSEUDOCOLOR; 684 break; 685 686 case 16: 687 case 24: 688 info->fix.line_length = var->xres_virtual * 689 var->bits_per_pixel >> 3; 690 info->fix.visual = FB_VISUAL_TRUECOLOR; 691 break; 692 } 693 info->fix.type = FB_TYPE_PACKED_PIXELS; 694 695 init_vgachip(info); 696 697 bi = &cirrusfb_board_info[cinfo->btype]; 698 699 hsyncstart = var->xres + var->right_margin; 700 hsyncend = hsyncstart + var->hsync_len; 701 htotal = (hsyncend + var->left_margin) / 8; 702 hdispend = var->xres / 8; 703 hsyncstart = hsyncstart / 8; 704 hsyncend = hsyncend / 8; 705 706 vdispend = var->yres; 707 vsyncstart = vdispend + var->lower_margin; 708 vsyncend = vsyncstart + var->vsync_len; 709 vtotal = vsyncend + var->upper_margin; 710 711 if (var->vmode & FB_VMODE_DOUBLE) { 712 vdispend *= 2; 713 vsyncstart *= 2; 714 vsyncend *= 2; 715 vtotal *= 2; 716 } else if (var->vmode & FB_VMODE_INTERLACED) { 717 vdispend = (vdispend + 1) / 2; 718 vsyncstart = (vsyncstart + 1) / 2; 719 vsyncend = (vsyncend + 1) / 2; 720 vtotal = (vtotal + 1) / 2; 721 } 722 yres = vdispend; 723 if (yres >= 1024) { 724 vtotal /= 2; 725 vsyncstart /= 2; 726 vsyncend /= 2; 727 vdispend /= 2; 728 } 729 730 vdispend -= 1; 731 vsyncstart -= 1; 732 vsyncend -= 1; 733 vtotal -= 2; 734 735 if (cinfo->multiplexing) { 736 htotal /= 2; 737 hsyncstart /= 2; 738 hsyncend /= 2; 739 hdispend /= 2; 740 } 741 742 htotal -= 5; 743 hdispend -= 1; 744 hsyncstart += 1; 745 hsyncend += 1; 746 747 /* unlock register VGA_CRTC_H_TOTAL..CRT7 */ 748 vga_wcrt(regbase, VGA_CRTC_V_SYNC_END, 0x20); /* previously: 0x00) */ 749 750 /* if debugging is enabled, all parameters get output before writing */ 751 dev_dbg(info->device, "CRT0: %d\n", htotal); 752 vga_wcrt(regbase, VGA_CRTC_H_TOTAL, htotal); 753 754 dev_dbg(info->device, "CRT1: %d\n", hdispend); 755 vga_wcrt(regbase, VGA_CRTC_H_DISP, hdispend); 756 757 dev_dbg(info->device, "CRT2: %d\n", var->xres / 8); 758 vga_wcrt(regbase, VGA_CRTC_H_BLANK_START, var->xres / 8); 759 760 /* + 128: Compatible read */ 761 dev_dbg(info->device, "CRT3: 128+%d\n", (htotal + 5) % 32); 762 vga_wcrt(regbase, VGA_CRTC_H_BLANK_END, 763 128 + ((htotal + 5) % 32)); 764 765 dev_dbg(info->device, "CRT4: %d\n", hsyncstart); 766 vga_wcrt(regbase, VGA_CRTC_H_SYNC_START, hsyncstart); 767 768 tmp = hsyncend % 32; 769 if ((htotal + 5) & 32) 770 tmp += 128; 771 dev_dbg(info->device, "CRT5: %d\n", tmp); 772 vga_wcrt(regbase, VGA_CRTC_H_SYNC_END, tmp); 773 774 dev_dbg(info->device, "CRT6: %d\n", vtotal & 0xff); 775 vga_wcrt(regbase, VGA_CRTC_V_TOTAL, vtotal & 0xff); 776 777 tmp = 16; /* LineCompare bit #9 */ 778 if (vtotal & 256) 779 tmp |= 1; 780 if (vdispend & 256) 781 tmp |= 2; 782 if (vsyncstart & 256) 783 tmp |= 4; 784 if ((vdispend + 1) & 256) 785 tmp |= 8; 786 if (vtotal & 512) 787 tmp |= 32; 788 if (vdispend & 512) 789 tmp |= 64; 790 if (vsyncstart & 512) 791 tmp |= 128; 792 dev_dbg(info->device, "CRT7: %d\n", tmp); 793 vga_wcrt(regbase, VGA_CRTC_OVERFLOW, tmp); 794 795 tmp = 0x40; /* LineCompare bit #8 */ 796 if ((vdispend + 1) & 512) 797 tmp |= 0x20; 798 if (var->vmode & FB_VMODE_DOUBLE) 799 tmp |= 0x80; 800 dev_dbg(info->device, "CRT9: %d\n", tmp); 801 vga_wcrt(regbase, VGA_CRTC_MAX_SCAN, tmp); 802 803 dev_dbg(info->device, "CRT10: %d\n", vsyncstart & 0xff); 804 vga_wcrt(regbase, VGA_CRTC_V_SYNC_START, vsyncstart & 0xff); 805 806 dev_dbg(info->device, "CRT11: 64+32+%d\n", vsyncend % 16); 807 vga_wcrt(regbase, VGA_CRTC_V_SYNC_END, vsyncend % 16 + 64 + 32); 808 809 dev_dbg(info->device, "CRT12: %d\n", vdispend & 0xff); 810 vga_wcrt(regbase, VGA_CRTC_V_DISP_END, vdispend & 0xff); 811 812 dev_dbg(info->device, "CRT15: %d\n", (vdispend + 1) & 0xff); 813 vga_wcrt(regbase, VGA_CRTC_V_BLANK_START, (vdispend + 1) & 0xff); 814 815 dev_dbg(info->device, "CRT16: %d\n", vtotal & 0xff); 816 vga_wcrt(regbase, VGA_CRTC_V_BLANK_END, vtotal & 0xff); 817 818 dev_dbg(info->device, "CRT18: 0xff\n"); 819 vga_wcrt(regbase, VGA_CRTC_LINE_COMPARE, 0xff); 820 821 tmp = 0; 822 if (var->vmode & FB_VMODE_INTERLACED) 823 tmp |= 1; 824 if ((htotal + 5) & 64) 825 tmp |= 16; 826 if ((htotal + 5) & 128) 827 tmp |= 32; 828 if (vtotal & 256) 829 tmp |= 64; 830 if (vtotal & 512) 831 tmp |= 128; 832 833 dev_dbg(info->device, "CRT1a: %d\n", tmp); 834 vga_wcrt(regbase, CL_CRT1A, tmp); 835 836 freq = PICOS2KHZ(var->pixclock); 837 if (var->bits_per_pixel == 24) 838 if (cinfo->btype == BT_ALPINE || cinfo->btype == BT_SD64) 839 freq *= 3; 840 if (cinfo->multiplexing) 841 freq /= 2; 842 if (cinfo->doubleVCLK) 843 freq *= 2; 844 845 bestclock(freq, &nom, &den, &div); 846 847 dev_dbg(info->device, "VCLK freq: %ld kHz nom: %d den: %d div: %d\n", 848 freq, nom, den, div); 849 850 /* set VCLK0 */ 851 /* hardware RefClock: 14.31818 MHz */ 852 /* formula: VClk = (OSC * N) / (D * (1+P)) */ 853 /* Example: VClk = (14.31818 * 91) / (23 * (1+1)) = 28.325 MHz */ 854 855 if (cinfo->btype == BT_ALPINE || cinfo->btype == BT_PICASSO4 || 856 cinfo->btype == BT_SD64) { 857 /* if freq is close to mclk or mclk/2 select mclk 858 * as clock source 859 */ 860 int divMCLK = cirrusfb_check_mclk(info, freq); 861 if (divMCLK) 862 nom = 0; 863 cirrusfb_set_mclk_as_source(info, divMCLK); 864 } 865 if (is_laguna(cinfo)) { 866 long pcifc = fb_readl(cinfo->laguna_mmio + 0x3fc); 867 unsigned char tile = fb_readb(cinfo->laguna_mmio + 0x407); 868 unsigned short tile_control; 869 870 if (cinfo->btype == BT_LAGUNAB) { 871 tile_control = fb_readw(cinfo->laguna_mmio + 0x2c4); 872 tile_control &= ~0x80; 873 fb_writew(tile_control, cinfo->laguna_mmio + 0x2c4); 874 } 875 876 fb_writel(pcifc | 0x10000000l, cinfo->laguna_mmio + 0x3fc); 877 fb_writeb(tile & 0x3f, cinfo->laguna_mmio + 0x407); 878 control = fb_readw(cinfo->laguna_mmio + 0x402); 879 threshold = fb_readw(cinfo->laguna_mmio + 0xea); 880 control &= ~0x6800; 881 format = 0; 882 threshold &= 0xffc0 & 0x3fbf; 883 } 884 if (nom) { 885 tmp = den << 1; 886 if (div != 0) 887 tmp |= 1; 888 /* 6 bit denom; ONLY 5434!!! (bugged me 10 days) */ 889 if ((cinfo->btype == BT_SD64) || 890 (cinfo->btype == BT_ALPINE) || 891 (cinfo->btype == BT_GD5480)) 892 tmp |= 0x80; 893 894 /* Laguna chipset has reversed clock registers */ 895 if (is_laguna(cinfo)) { 896 vga_wseq(regbase, CL_SEQRE, tmp); 897 vga_wseq(regbase, CL_SEQR1E, nom); 898 } else { 899 vga_wseq(regbase, CL_SEQRE, nom); 900 vga_wseq(regbase, CL_SEQR1E, tmp); 901 } 902 } 903 904 if (yres >= 1024) 905 /* 1280x1024 */ 906 vga_wcrt(regbase, VGA_CRTC_MODE, 0xc7); 907 else 908 /* mode control: VGA_CRTC_START_HI enable, ROTATE(?), 16bit 909 * address wrap, no compat. */ 910 vga_wcrt(regbase, VGA_CRTC_MODE, 0xc3); 911 912 /* don't know if it would hurt to also program this if no interlaced */ 913 /* mode is used, but I feel better this way.. :-) */ 914 if (var->vmode & FB_VMODE_INTERLACED) 915 vga_wcrt(regbase, VGA_CRTC_REGS, htotal / 2); 916 else 917 vga_wcrt(regbase, VGA_CRTC_REGS, 0x00); /* interlace control */ 918 919 /* adjust horizontal/vertical sync type (low/high), use VCLK3 */ 920 /* enable display memory & CRTC I/O address for color mode */ 921 tmp = 0x03 | 0xc; 922 if (var->sync & FB_SYNC_HOR_HIGH_ACT) 923 tmp |= 0x40; 924 if (var->sync & FB_SYNC_VERT_HIGH_ACT) 925 tmp |= 0x80; 926 WGen(cinfo, VGA_MIS_W, tmp); 927 928 /* text cursor on and start line */ 929 vga_wcrt(regbase, VGA_CRTC_CURSOR_START, 0); 930 /* text cursor end line */ 931 vga_wcrt(regbase, VGA_CRTC_CURSOR_END, 31); 932 933 /****************************************************** 934 * 935 * 1 bpp 936 * 937 */ 938 939 /* programming for different color depths */ 940 if (var->bits_per_pixel == 1) { 941 dev_dbg(info->device, "preparing for 1 bit deep display\n"); 942 vga_wgfx(regbase, VGA_GFX_MODE, 0); /* mode register */ 943 944 /* SR07 */ 945 switch (cinfo->btype) { 946 case BT_SD64: 947 case BT_PICCOLO: 948 case BT_PICASSO: 949 case BT_SPECTRUM: 950 case BT_PICASSO4: 951 case BT_ALPINE: 952 case BT_GD5480: 953 vga_wseq(regbase, CL_SEQR7, 954 cinfo->multiplexing ? 955 bi->sr07_1bpp_mux : bi->sr07_1bpp); 956 break; 957 958 case BT_LAGUNA: 959 case BT_LAGUNAB: 960 vga_wseq(regbase, CL_SEQR7, 961 vga_rseq(regbase, CL_SEQR7) & ~0x01); 962 break; 963 964 default: 965 dev_warn(info->device, "unknown Board\n"); 966 break; 967 } 968 969 /* Extended Sequencer Mode */ 970 switch (cinfo->btype) { 971 972 case BT_PICCOLO: 973 case BT_SPECTRUM: 974 /* evtl d0 bei 1 bit? avoid FIFO underruns..? */ 975 vga_wseq(regbase, CL_SEQRF, 0xb0); 976 break; 977 978 case BT_PICASSO: 979 /* ## vorher d0 avoid FIFO underruns..? */ 980 vga_wseq(regbase, CL_SEQRF, 0xd0); 981 break; 982 983 case BT_SD64: 984 case BT_PICASSO4: 985 case BT_ALPINE: 986 case BT_GD5480: 987 case BT_LAGUNA: 988 case BT_LAGUNAB: 989 /* do nothing */ 990 break; 991 992 default: 993 dev_warn(info->device, "unknown Board\n"); 994 break; 995 } 996 997 /* pixel mask: pass-through for first plane */ 998 WGen(cinfo, VGA_PEL_MSK, 0x01); 999 if (cinfo->multiplexing) 1000 /* hidden dac reg: 1280x1024 */ 1001 WHDR(cinfo, 0x4a); 1002 else 1003 /* hidden dac: nothing */ 1004 WHDR(cinfo, 0); 1005 /* memory mode: odd/even, ext. memory */ 1006 vga_wseq(regbase, VGA_SEQ_MEMORY_MODE, 0x06); 1007 /* plane mask: only write to first plane */ 1008 vga_wseq(regbase, VGA_SEQ_PLANE_WRITE, 0x01); 1009 } 1010 1011 /****************************************************** 1012 * 1013 * 8 bpp 1014 * 1015 */ 1016 1017 else if (var->bits_per_pixel == 8) { 1018 dev_dbg(info->device, "preparing for 8 bit deep display\n"); 1019 switch (cinfo->btype) { 1020 case BT_SD64: 1021 case BT_PICCOLO: 1022 case BT_PICASSO: 1023 case BT_SPECTRUM: 1024 case BT_PICASSO4: 1025 case BT_ALPINE: 1026 case BT_GD5480: 1027 vga_wseq(regbase, CL_SEQR7, 1028 cinfo->multiplexing ? 1029 bi->sr07_8bpp_mux : bi->sr07_8bpp); 1030 break; 1031 1032 case BT_LAGUNA: 1033 case BT_LAGUNAB: 1034 vga_wseq(regbase, CL_SEQR7, 1035 vga_rseq(regbase, CL_SEQR7) | 0x01); 1036 threshold |= 0x10; 1037 break; 1038 1039 default: 1040 dev_warn(info->device, "unknown Board\n"); 1041 break; 1042 } 1043 1044 switch (cinfo->btype) { 1045 case BT_PICCOLO: 1046 case BT_PICASSO: 1047 case BT_SPECTRUM: 1048 /* Fast Page-Mode writes */ 1049 vga_wseq(regbase, CL_SEQRF, 0xb0); 1050 break; 1051 1052 case BT_PICASSO4: 1053 #ifdef CONFIG_ZORRO 1054 /* ### INCOMPLETE!! */ 1055 vga_wseq(regbase, CL_SEQRF, 0xb8); 1056 #endif 1057 case BT_ALPINE: 1058 case BT_SD64: 1059 case BT_GD5480: 1060 case BT_LAGUNA: 1061 case BT_LAGUNAB: 1062 /* do nothing */ 1063 break; 1064 1065 default: 1066 dev_warn(info->device, "unknown board\n"); 1067 break; 1068 } 1069 1070 /* mode register: 256 color mode */ 1071 vga_wgfx(regbase, VGA_GFX_MODE, 64); 1072 if (cinfo->multiplexing) 1073 /* hidden dac reg: 1280x1024 */ 1074 WHDR(cinfo, 0x4a); 1075 else 1076 /* hidden dac: nothing */ 1077 WHDR(cinfo, 0); 1078 } 1079 1080 /****************************************************** 1081 * 1082 * 16 bpp 1083 * 1084 */ 1085 1086 else if (var->bits_per_pixel == 16) { 1087 dev_dbg(info->device, "preparing for 16 bit deep display\n"); 1088 switch (cinfo->btype) { 1089 case BT_PICCOLO: 1090 case BT_SPECTRUM: 1091 vga_wseq(regbase, CL_SEQR7, 0x87); 1092 /* Fast Page-Mode writes */ 1093 vga_wseq(regbase, CL_SEQRF, 0xb0); 1094 break; 1095 1096 case BT_PICASSO: 1097 vga_wseq(regbase, CL_SEQR7, 0x27); 1098 /* Fast Page-Mode writes */ 1099 vga_wseq(regbase, CL_SEQRF, 0xb0); 1100 break; 1101 1102 case BT_SD64: 1103 case BT_PICASSO4: 1104 case BT_ALPINE: 1105 /* Extended Sequencer Mode: 256c col. mode */ 1106 vga_wseq(regbase, CL_SEQR7, 1107 cinfo->doubleVCLK ? 0xa3 : 0xa7); 1108 break; 1109 1110 case BT_GD5480: 1111 vga_wseq(regbase, CL_SEQR7, 0x17); 1112 /* We already set SRF and SR1F */ 1113 break; 1114 1115 case BT_LAGUNA: 1116 case BT_LAGUNAB: 1117 vga_wseq(regbase, CL_SEQR7, 1118 vga_rseq(regbase, CL_SEQR7) & ~0x01); 1119 control |= 0x2000; 1120 format |= 0x1400; 1121 threshold |= 0x10; 1122 break; 1123 1124 default: 1125 dev_warn(info->device, "unknown Board\n"); 1126 break; 1127 } 1128 1129 /* mode register: 256 color mode */ 1130 vga_wgfx(regbase, VGA_GFX_MODE, 64); 1131 #ifdef CONFIG_PCI 1132 WHDR(cinfo, cinfo->doubleVCLK ? 0xe1 : 0xc1); 1133 #elif defined(CONFIG_ZORRO) 1134 /* FIXME: CONFIG_PCI and CONFIG_ZORRO may be defined both */ 1135 WHDR(cinfo, 0xa0); /* hidden dac reg: nothing special */ 1136 #endif 1137 } 1138 1139 /****************************************************** 1140 * 1141 * 24 bpp 1142 * 1143 */ 1144 1145 else if (var->bits_per_pixel == 24) { 1146 dev_dbg(info->device, "preparing for 24 bit deep display\n"); 1147 switch (cinfo->btype) { 1148 case BT_PICCOLO: 1149 case BT_SPECTRUM: 1150 vga_wseq(regbase, CL_SEQR7, 0x85); 1151 /* Fast Page-Mode writes */ 1152 vga_wseq(regbase, CL_SEQRF, 0xb0); 1153 break; 1154 1155 case BT_PICASSO: 1156 vga_wseq(regbase, CL_SEQR7, 0x25); 1157 /* Fast Page-Mode writes */ 1158 vga_wseq(regbase, CL_SEQRF, 0xb0); 1159 break; 1160 1161 case BT_SD64: 1162 case BT_PICASSO4: 1163 case BT_ALPINE: 1164 /* Extended Sequencer Mode: 256c col. mode */ 1165 vga_wseq(regbase, CL_SEQR7, 0xa5); 1166 break; 1167 1168 case BT_GD5480: 1169 vga_wseq(regbase, CL_SEQR7, 0x15); 1170 /* We already set SRF and SR1F */ 1171 break; 1172 1173 case BT_LAGUNA: 1174 case BT_LAGUNAB: 1175 vga_wseq(regbase, CL_SEQR7, 1176 vga_rseq(regbase, CL_SEQR7) & ~0x01); 1177 control |= 0x4000; 1178 format |= 0x2400; 1179 threshold |= 0x20; 1180 break; 1181 1182 default: 1183 dev_warn(info->device, "unknown Board\n"); 1184 break; 1185 } 1186 1187 /* mode register: 256 color mode */ 1188 vga_wgfx(regbase, VGA_GFX_MODE, 64); 1189 /* hidden dac reg: 8-8-8 mode (24 or 32) */ 1190 WHDR(cinfo, 0xc5); 1191 } 1192 1193 /****************************************************** 1194 * 1195 * unknown/unsupported bpp 1196 * 1197 */ 1198 1199 else 1200 dev_err(info->device, 1201 "What's this? requested color depth == %d.\n", 1202 var->bits_per_pixel); 1203 1204 pitch = info->fix.line_length >> 3; 1205 vga_wcrt(regbase, VGA_CRTC_OFFSET, pitch & 0xff); 1206 tmp = 0x22; 1207 if (pitch & 0x100) 1208 tmp |= 0x10; /* offset overflow bit */ 1209 1210 /* screen start addr #16-18, fastpagemode cycles */ 1211 vga_wcrt(regbase, CL_CRT1B, tmp); 1212 1213 /* screen start address bit 19 */ 1214 if (cirrusfb_board_info[cinfo->btype].scrn_start_bit19) 1215 vga_wcrt(regbase, CL_CRT1D, (pitch >> 9) & 1); 1216 1217 if (is_laguna(cinfo)) { 1218 tmp = 0; 1219 if ((htotal + 5) & 256) 1220 tmp |= 128; 1221 if (hdispend & 256) 1222 tmp |= 64; 1223 if (hsyncstart & 256) 1224 tmp |= 48; 1225 if (vtotal & 1024) 1226 tmp |= 8; 1227 if (vdispend & 1024) 1228 tmp |= 4; 1229 if (vsyncstart & 1024) 1230 tmp |= 3; 1231 1232 vga_wcrt(regbase, CL_CRT1E, tmp); 1233 dev_dbg(info->device, "CRT1e: %d\n", tmp); 1234 } 1235 1236 /* pixel panning */ 1237 vga_wattr(regbase, CL_AR33, 0); 1238 1239 /* [ EGS: SetOffset(); ] */ 1240 /* From SetOffset(): Turn on VideoEnable bit in Attribute controller */ 1241 AttrOn(cinfo); 1242 1243 if (is_laguna(cinfo)) { 1244 /* no tiles */ 1245 fb_writew(control | 0x1000, cinfo->laguna_mmio + 0x402); 1246 fb_writew(format, cinfo->laguna_mmio + 0xc0); 1247 fb_writew(threshold, cinfo->laguna_mmio + 0xea); 1248 } 1249 /* finally, turn on everything - turn off "FullBandwidth" bit */ 1250 /* also, set "DotClock%2" bit where requested */ 1251 tmp = 0x01; 1252 1253 /*** FB_VMODE_CLOCK_HALVE in linux/fb.h not defined anymore ? 1254 if (var->vmode & FB_VMODE_CLOCK_HALVE) 1255 tmp |= 0x08; 1256 */ 1257 1258 vga_wseq(regbase, VGA_SEQ_CLOCK_MODE, tmp); 1259 dev_dbg(info->device, "CL_SEQR1: %d\n", tmp); 1260 1261 #ifdef CIRRUSFB_DEBUG 1262 cirrusfb_dbg_reg_dump(info, NULL); 1263 #endif 1264 1265 return 0; 1266 } 1267 1268 /* for some reason incomprehensible to me, cirrusfb requires that you write 1269 * the registers twice for the settings to take..grr. -dte */ 1270 static int cirrusfb_set_par(struct fb_info *info) 1271 { 1272 cirrusfb_set_par_foo(info); 1273 return cirrusfb_set_par_foo(info); 1274 } 1275 1276 static int cirrusfb_setcolreg(unsigned regno, unsigned red, unsigned green, 1277 unsigned blue, unsigned transp, 1278 struct fb_info *info) 1279 { 1280 struct cirrusfb_info *cinfo = info->par; 1281 1282 if (regno > 255) 1283 return -EINVAL; 1284 1285 if (info->fix.visual == FB_VISUAL_TRUECOLOR) { 1286 u32 v; 1287 red >>= (16 - info->var.red.length); 1288 green >>= (16 - info->var.green.length); 1289 blue >>= (16 - info->var.blue.length); 1290 1291 if (regno >= 16) 1292 return 1; 1293 v = (red << info->var.red.offset) | 1294 (green << info->var.green.offset) | 1295 (blue << info->var.blue.offset); 1296 1297 cinfo->pseudo_palette[regno] = v; 1298 return 0; 1299 } 1300 1301 if (info->var.bits_per_pixel == 8) 1302 WClut(cinfo, regno, red >> 10, green >> 10, blue >> 10); 1303 1304 return 0; 1305 1306 } 1307 1308 /************************************************************************* 1309 cirrusfb_pan_display() 1310 1311 performs display panning - provided hardware permits this 1312 **************************************************************************/ 1313 static int cirrusfb_pan_display(struct fb_var_screeninfo *var, 1314 struct fb_info *info) 1315 { 1316 int xoffset; 1317 unsigned long base; 1318 unsigned char tmp, xpix; 1319 struct cirrusfb_info *cinfo = info->par; 1320 1321 /* no range checks for xoffset and yoffset, */ 1322 /* as fb_pan_display has already done this */ 1323 if (var->vmode & FB_VMODE_YWRAP) 1324 return -EINVAL; 1325 1326 xoffset = var->xoffset * info->var.bits_per_pixel / 8; 1327 1328 base = var->yoffset * info->fix.line_length + xoffset; 1329 1330 if (info->var.bits_per_pixel == 1) { 1331 /* base is already correct */ 1332 xpix = (unsigned char) (var->xoffset % 8); 1333 } else { 1334 base /= 4; 1335 xpix = (unsigned char) ((xoffset % 4) * 2); 1336 } 1337 1338 if (!is_laguna(cinfo)) 1339 cirrusfb_WaitBLT(cinfo->regbase); 1340 1341 /* lower 8 + 8 bits of screen start address */ 1342 vga_wcrt(cinfo->regbase, VGA_CRTC_START_LO, base & 0xff); 1343 vga_wcrt(cinfo->regbase, VGA_CRTC_START_HI, (base >> 8) & 0xff); 1344 1345 /* 0xf2 is %11110010, exclude tmp bits */ 1346 tmp = vga_rcrt(cinfo->regbase, CL_CRT1B) & 0xf2; 1347 /* construct bits 16, 17 and 18 of screen start address */ 1348 if (base & 0x10000) 1349 tmp |= 0x01; 1350 if (base & 0x20000) 1351 tmp |= 0x04; 1352 if (base & 0x40000) 1353 tmp |= 0x08; 1354 1355 vga_wcrt(cinfo->regbase, CL_CRT1B, tmp); 1356 1357 /* construct bit 19 of screen start address */ 1358 if (cirrusfb_board_info[cinfo->btype].scrn_start_bit19) { 1359 tmp = vga_rcrt(cinfo->regbase, CL_CRT1D); 1360 if (is_laguna(cinfo)) 1361 tmp = (tmp & ~0x18) | ((base >> 16) & 0x18); 1362 else 1363 tmp = (tmp & ~0x80) | ((base >> 12) & 0x80); 1364 vga_wcrt(cinfo->regbase, CL_CRT1D, tmp); 1365 } 1366 1367 /* write pixel panning value to AR33; this does not quite work in 8bpp 1368 * 1369 * ### Piccolo..? Will this work? 1370 */ 1371 if (info->var.bits_per_pixel == 1) 1372 vga_wattr(cinfo->regbase, CL_AR33, xpix); 1373 1374 return 0; 1375 } 1376 1377 static int cirrusfb_blank(int blank_mode, struct fb_info *info) 1378 { 1379 /* 1380 * Blank the screen if blank_mode != 0, else unblank. If blank == NULL 1381 * then the caller blanks by setting the CLUT (Color Look Up Table) 1382 * to all black. Return 0 if blanking succeeded, != 0 if un-/blanking 1383 * failed due to e.g. a video mode which doesn't support it. 1384 * Implements VESA suspend and powerdown modes on hardware that 1385 * supports disabling hsync/vsync: 1386 * blank_mode == 2: suspend vsync 1387 * blank_mode == 3: suspend hsync 1388 * blank_mode == 4: powerdown 1389 */ 1390 unsigned char val; 1391 struct cirrusfb_info *cinfo = info->par; 1392 int current_mode = cinfo->blank_mode; 1393 1394 dev_dbg(info->device, "ENTER, blank mode = %d\n", blank_mode); 1395 1396 if (info->state != FBINFO_STATE_RUNNING || 1397 current_mode == blank_mode) { 1398 dev_dbg(info->device, "EXIT, returning 0\n"); 1399 return 0; 1400 } 1401 1402 /* Undo current */ 1403 if (current_mode == FB_BLANK_NORMAL || 1404 current_mode == FB_BLANK_UNBLANK) 1405 /* clear "FullBandwidth" bit */ 1406 val = 0; 1407 else 1408 /* set "FullBandwidth" bit */ 1409 val = 0x20; 1410 1411 val |= vga_rseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE) & 0xdf; 1412 vga_wseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE, val); 1413 1414 switch (blank_mode) { 1415 case FB_BLANK_UNBLANK: 1416 case FB_BLANK_NORMAL: 1417 val = 0x00; 1418 break; 1419 case FB_BLANK_VSYNC_SUSPEND: 1420 val = 0x04; 1421 break; 1422 case FB_BLANK_HSYNC_SUSPEND: 1423 val = 0x02; 1424 break; 1425 case FB_BLANK_POWERDOWN: 1426 val = 0x06; 1427 break; 1428 default: 1429 dev_dbg(info->device, "EXIT, returning 1\n"); 1430 return 1; 1431 } 1432 1433 vga_wgfx(cinfo->regbase, CL_GRE, val); 1434 1435 cinfo->blank_mode = blank_mode; 1436 dev_dbg(info->device, "EXIT, returning 0\n"); 1437 1438 /* Let fbcon do a soft blank for us */ 1439 return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0; 1440 } 1441 1442 /**** END Hardware specific Routines **************************************/ 1443 /****************************************************************************/ 1444 /**** BEGIN Internal Routines ***********************************************/ 1445 1446 static void init_vgachip(struct fb_info *info) 1447 { 1448 struct cirrusfb_info *cinfo = info->par; 1449 const struct cirrusfb_board_info_rec *bi; 1450 1451 assert(cinfo != NULL); 1452 1453 bi = &cirrusfb_board_info[cinfo->btype]; 1454 1455 /* reset board globally */ 1456 switch (cinfo->btype) { 1457 case BT_PICCOLO: 1458 WSFR(cinfo, 0x01); 1459 udelay(500); 1460 WSFR(cinfo, 0x51); 1461 udelay(500); 1462 break; 1463 case BT_PICASSO: 1464 WSFR2(cinfo, 0xff); 1465 udelay(500); 1466 break; 1467 case BT_SD64: 1468 case BT_SPECTRUM: 1469 WSFR(cinfo, 0x1f); 1470 udelay(500); 1471 WSFR(cinfo, 0x4f); 1472 udelay(500); 1473 break; 1474 case BT_PICASSO4: 1475 /* disable flickerfixer */ 1476 vga_wcrt(cinfo->regbase, CL_CRT51, 0x00); 1477 mdelay(100); 1478 /* mode */ 1479 vga_wgfx(cinfo->regbase, CL_GR31, 0x00); 1480 fallthrough; 1481 case BT_GD5480: 1482 /* from Klaus' NetBSD driver: */ 1483 vga_wgfx(cinfo->regbase, CL_GR2F, 0x00); 1484 fallthrough; 1485 case BT_ALPINE: 1486 /* put blitter into 542x compat */ 1487 vga_wgfx(cinfo->regbase, CL_GR33, 0x00); 1488 break; 1489 1490 case BT_LAGUNA: 1491 case BT_LAGUNAB: 1492 /* Nothing to do to reset the board. */ 1493 break; 1494 1495 default: 1496 dev_err(info->device, "Warning: Unknown board type\n"); 1497 break; 1498 } 1499 1500 /* make sure RAM size set by this point */ 1501 assert(info->screen_size > 0); 1502 1503 /* the P4 is not fully initialized here; I rely on it having been */ 1504 /* inited under AmigaOS already, which seems to work just fine */ 1505 /* (Klaus advised to do it this way) */ 1506 1507 if (cinfo->btype != BT_PICASSO4) { 1508 WGen(cinfo, CL_VSSM, 0x10); /* EGS: 0x16 */ 1509 WGen(cinfo, CL_POS102, 0x01); 1510 WGen(cinfo, CL_VSSM, 0x08); /* EGS: 0x0e */ 1511 1512 if (cinfo->btype != BT_SD64) 1513 WGen(cinfo, CL_VSSM2, 0x01); 1514 1515 /* reset sequencer logic */ 1516 vga_wseq(cinfo->regbase, VGA_SEQ_RESET, 0x03); 1517 1518 /* FullBandwidth (video off) and 8/9 dot clock */ 1519 vga_wseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE, 0x21); 1520 1521 /* "magic cookie" - doesn't make any sense to me.. */ 1522 /* vga_wgfx(cinfo->regbase, CL_GRA, 0xce); */ 1523 /* unlock all extension registers */ 1524 vga_wseq(cinfo->regbase, CL_SEQR6, 0x12); 1525 1526 switch (cinfo->btype) { 1527 case BT_GD5480: 1528 vga_wseq(cinfo->regbase, CL_SEQRF, 0x98); 1529 break; 1530 case BT_ALPINE: 1531 case BT_LAGUNA: 1532 case BT_LAGUNAB: 1533 break; 1534 case BT_SD64: 1535 #ifdef CONFIG_ZORRO 1536 vga_wseq(cinfo->regbase, CL_SEQRF, 0xb8); 1537 #endif 1538 break; 1539 default: 1540 vga_wseq(cinfo->regbase, CL_SEQR16, 0x0f); 1541 vga_wseq(cinfo->regbase, CL_SEQRF, 0xb0); 1542 break; 1543 } 1544 } 1545 /* plane mask: nothing */ 1546 vga_wseq(cinfo->regbase, VGA_SEQ_PLANE_WRITE, 0xff); 1547 /* character map select: doesn't even matter in gx mode */ 1548 vga_wseq(cinfo->regbase, VGA_SEQ_CHARACTER_MAP, 0x00); 1549 /* memory mode: chain4, ext. memory */ 1550 vga_wseq(cinfo->regbase, VGA_SEQ_MEMORY_MODE, 0x0a); 1551 1552 /* controller-internal base address of video memory */ 1553 if (bi->init_sr07) 1554 vga_wseq(cinfo->regbase, CL_SEQR7, bi->sr07); 1555 1556 /* vga_wseq(cinfo->regbase, CL_SEQR8, 0x00); */ 1557 /* EEPROM control: shouldn't be necessary to write to this at all.. */ 1558 1559 /* graphics cursor X position (incomplete; position gives rem. 3 bits */ 1560 vga_wseq(cinfo->regbase, CL_SEQR10, 0x00); 1561 /* graphics cursor Y position (..."... ) */ 1562 vga_wseq(cinfo->regbase, CL_SEQR11, 0x00); 1563 /* graphics cursor attributes */ 1564 vga_wseq(cinfo->regbase, CL_SEQR12, 0x00); 1565 /* graphics cursor pattern address */ 1566 vga_wseq(cinfo->regbase, CL_SEQR13, 0x00); 1567 1568 /* writing these on a P4 might give problems.. */ 1569 if (cinfo->btype != BT_PICASSO4) { 1570 /* configuration readback and ext. color */ 1571 vga_wseq(cinfo->regbase, CL_SEQR17, 0x00); 1572 /* signature generator */ 1573 vga_wseq(cinfo->regbase, CL_SEQR18, 0x02); 1574 } 1575 1576 /* Screen A preset row scan: none */ 1577 vga_wcrt(cinfo->regbase, VGA_CRTC_PRESET_ROW, 0x00); 1578 /* Text cursor start: disable text cursor */ 1579 vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_START, 0x20); 1580 /* Text cursor end: - */ 1581 vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_END, 0x00); 1582 /* text cursor location high: 0 */ 1583 vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_HI, 0x00); 1584 /* text cursor location low: 0 */ 1585 vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_LO, 0x00); 1586 1587 /* Underline Row scanline: - */ 1588 vga_wcrt(cinfo->regbase, VGA_CRTC_UNDERLINE, 0x00); 1589 /* ### add 0x40 for text modes with > 30 MHz pixclock */ 1590 /* ext. display controls: ext.adr. wrap */ 1591 vga_wcrt(cinfo->regbase, CL_CRT1B, 0x02); 1592 1593 /* Set/Reset registers: - */ 1594 vga_wgfx(cinfo->regbase, VGA_GFX_SR_VALUE, 0x00); 1595 /* Set/Reset enable: - */ 1596 vga_wgfx(cinfo->regbase, VGA_GFX_SR_ENABLE, 0x00); 1597 /* Color Compare: - */ 1598 vga_wgfx(cinfo->regbase, VGA_GFX_COMPARE_VALUE, 0x00); 1599 /* Data Rotate: - */ 1600 vga_wgfx(cinfo->regbase, VGA_GFX_DATA_ROTATE, 0x00); 1601 /* Read Map Select: - */ 1602 vga_wgfx(cinfo->regbase, VGA_GFX_PLANE_READ, 0x00); 1603 /* Mode: conf. for 16/4/2 color mode, no odd/even, read/write mode 0 */ 1604 vga_wgfx(cinfo->regbase, VGA_GFX_MODE, 0x00); 1605 /* Miscellaneous: memory map base address, graphics mode */ 1606 vga_wgfx(cinfo->regbase, VGA_GFX_MISC, 0x01); 1607 /* Color Don't care: involve all planes */ 1608 vga_wgfx(cinfo->regbase, VGA_GFX_COMPARE_MASK, 0x0f); 1609 /* Bit Mask: no mask at all */ 1610 vga_wgfx(cinfo->regbase, VGA_GFX_BIT_MASK, 0xff); 1611 1612 if (cinfo->btype == BT_ALPINE || cinfo->btype == BT_SD64 || 1613 is_laguna(cinfo)) 1614 /* (5434 can't have bit 3 set for bitblt) */ 1615 vga_wgfx(cinfo->regbase, CL_GRB, 0x20); 1616 else 1617 /* Graphics controller mode extensions: finer granularity, 1618 * 8byte data latches 1619 */ 1620 vga_wgfx(cinfo->regbase, CL_GRB, 0x28); 1621 1622 vga_wgfx(cinfo->regbase, CL_GRC, 0xff); /* Color Key compare: - */ 1623 vga_wgfx(cinfo->regbase, CL_GRD, 0x00); /* Color Key compare mask: - */ 1624 vga_wgfx(cinfo->regbase, CL_GRE, 0x00); /* Miscellaneous control: - */ 1625 /* Background color byte 1: - */ 1626 /* vga_wgfx (cinfo->regbase, CL_GR10, 0x00); */ 1627 /* vga_wgfx (cinfo->regbase, CL_GR11, 0x00); */ 1628 1629 /* Attribute Controller palette registers: "identity mapping" */ 1630 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE0, 0x00); 1631 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE1, 0x01); 1632 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE2, 0x02); 1633 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE3, 0x03); 1634 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE4, 0x04); 1635 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE5, 0x05); 1636 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE6, 0x06); 1637 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE7, 0x07); 1638 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE8, 0x08); 1639 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE9, 0x09); 1640 vga_wattr(cinfo->regbase, VGA_ATC_PALETTEA, 0x0a); 1641 vga_wattr(cinfo->regbase, VGA_ATC_PALETTEB, 0x0b); 1642 vga_wattr(cinfo->regbase, VGA_ATC_PALETTEC, 0x0c); 1643 vga_wattr(cinfo->regbase, VGA_ATC_PALETTED, 0x0d); 1644 vga_wattr(cinfo->regbase, VGA_ATC_PALETTEE, 0x0e); 1645 vga_wattr(cinfo->regbase, VGA_ATC_PALETTEF, 0x0f); 1646 1647 /* Attribute Controller mode: graphics mode */ 1648 vga_wattr(cinfo->regbase, VGA_ATC_MODE, 0x01); 1649 /* Overscan color reg.: reg. 0 */ 1650 vga_wattr(cinfo->regbase, VGA_ATC_OVERSCAN, 0x00); 1651 /* Color Plane enable: Enable all 4 planes */ 1652 vga_wattr(cinfo->regbase, VGA_ATC_PLANE_ENABLE, 0x0f); 1653 /* Color Select: - */ 1654 vga_wattr(cinfo->regbase, VGA_ATC_COLOR_PAGE, 0x00); 1655 1656 WGen(cinfo, VGA_PEL_MSK, 0xff); /* Pixel mask: no mask */ 1657 1658 /* BLT Start/status: Blitter reset */ 1659 vga_wgfx(cinfo->regbase, CL_GR31, 0x04); 1660 /* - " - : "end-of-reset" */ 1661 vga_wgfx(cinfo->regbase, CL_GR31, 0x00); 1662 1663 /* misc... */ 1664 WHDR(cinfo, 0); /* Hidden DAC register: - */ 1665 return; 1666 } 1667 1668 static void switch_monitor(struct cirrusfb_info *cinfo, int on) 1669 { 1670 #ifdef CONFIG_ZORRO /* only works on Zorro boards */ 1671 static int IsOn = 0; /* XXX not ok for multiple boards */ 1672 1673 if (cinfo->btype == BT_PICASSO4) 1674 return; /* nothing to switch */ 1675 if (cinfo->btype == BT_ALPINE) 1676 return; /* nothing to switch */ 1677 if (cinfo->btype == BT_GD5480) 1678 return; /* nothing to switch */ 1679 if (cinfo->btype == BT_PICASSO) { 1680 if ((on && !IsOn) || (!on && IsOn)) 1681 WSFR(cinfo, 0xff); 1682 return; 1683 } 1684 if (on) { 1685 switch (cinfo->btype) { 1686 case BT_SD64: 1687 WSFR(cinfo, cinfo->SFR | 0x21); 1688 break; 1689 case BT_PICCOLO: 1690 WSFR(cinfo, cinfo->SFR | 0x28); 1691 break; 1692 case BT_SPECTRUM: 1693 WSFR(cinfo, 0x6f); 1694 break; 1695 default: /* do nothing */ break; 1696 } 1697 } else { 1698 switch (cinfo->btype) { 1699 case BT_SD64: 1700 WSFR(cinfo, cinfo->SFR & 0xde); 1701 break; 1702 case BT_PICCOLO: 1703 WSFR(cinfo, cinfo->SFR & 0xd7); 1704 break; 1705 case BT_SPECTRUM: 1706 WSFR(cinfo, 0x4f); 1707 break; 1708 default: /* do nothing */ 1709 break; 1710 } 1711 } 1712 #endif /* CONFIG_ZORRO */ 1713 } 1714 1715 /******************************************/ 1716 /* Linux 2.6-style accelerated functions */ 1717 /******************************************/ 1718 1719 static int cirrusfb_sync(struct fb_info *info) 1720 { 1721 struct cirrusfb_info *cinfo = info->par; 1722 1723 if (!is_laguna(cinfo)) { 1724 while (vga_rgfx(cinfo->regbase, CL_GR31) & 0x03) 1725 cpu_relax(); 1726 } 1727 return 0; 1728 } 1729 1730 static void cirrusfb_fillrect(struct fb_info *info, 1731 const struct fb_fillrect *region) 1732 { 1733 struct fb_fillrect modded; 1734 int vxres, vyres; 1735 struct cirrusfb_info *cinfo = info->par; 1736 int m = info->var.bits_per_pixel; 1737 u32 color = (info->fix.visual == FB_VISUAL_TRUECOLOR) ? 1738 cinfo->pseudo_palette[region->color] : region->color; 1739 1740 if (info->state != FBINFO_STATE_RUNNING) 1741 return; 1742 if (info->flags & FBINFO_HWACCEL_DISABLED) { 1743 cfb_fillrect(info, region); 1744 return; 1745 } 1746 1747 vxres = info->var.xres_virtual; 1748 vyres = info->var.yres_virtual; 1749 1750 memcpy(&modded, region, sizeof(struct fb_fillrect)); 1751 1752 if (!modded.width || !modded.height || 1753 modded.dx >= vxres || modded.dy >= vyres) 1754 return; 1755 1756 if (modded.dx + modded.width > vxres) 1757 modded.width = vxres - modded.dx; 1758 if (modded.dy + modded.height > vyres) 1759 modded.height = vyres - modded.dy; 1760 1761 cirrusfb_RectFill(cinfo->regbase, 1762 info->var.bits_per_pixel, 1763 (region->dx * m) / 8, region->dy, 1764 (region->width * m) / 8, region->height, 1765 color, color, 1766 info->fix.line_length, 0x40); 1767 } 1768 1769 static void cirrusfb_copyarea(struct fb_info *info, 1770 const struct fb_copyarea *area) 1771 { 1772 struct fb_copyarea modded; 1773 u32 vxres, vyres; 1774 struct cirrusfb_info *cinfo = info->par; 1775 int m = info->var.bits_per_pixel; 1776 1777 if (info->state != FBINFO_STATE_RUNNING) 1778 return; 1779 if (info->flags & FBINFO_HWACCEL_DISABLED) { 1780 cfb_copyarea(info, area); 1781 return; 1782 } 1783 1784 vxres = info->var.xres_virtual; 1785 vyres = info->var.yres_virtual; 1786 memcpy(&modded, area, sizeof(struct fb_copyarea)); 1787 1788 if (!modded.width || !modded.height || 1789 modded.sx >= vxres || modded.sy >= vyres || 1790 modded.dx >= vxres || modded.dy >= vyres) 1791 return; 1792 1793 if (modded.sx + modded.width > vxres) 1794 modded.width = vxres - modded.sx; 1795 if (modded.dx + modded.width > vxres) 1796 modded.width = vxres - modded.dx; 1797 if (modded.sy + modded.height > vyres) 1798 modded.height = vyres - modded.sy; 1799 if (modded.dy + modded.height > vyres) 1800 modded.height = vyres - modded.dy; 1801 1802 cirrusfb_BitBLT(cinfo->regbase, info->var.bits_per_pixel, 1803 (area->sx * m) / 8, area->sy, 1804 (area->dx * m) / 8, area->dy, 1805 (area->width * m) / 8, area->height, 1806 info->fix.line_length); 1807 1808 } 1809 1810 static void cirrusfb_imageblit(struct fb_info *info, 1811 const struct fb_image *image) 1812 { 1813 struct cirrusfb_info *cinfo = info->par; 1814 unsigned char op = (info->var.bits_per_pixel == 24) ? 0xc : 0x4; 1815 1816 if (info->state != FBINFO_STATE_RUNNING) 1817 return; 1818 /* Alpine/SD64 does not work at 24bpp ??? */ 1819 if (info->flags & FBINFO_HWACCEL_DISABLED || image->depth != 1) 1820 cfb_imageblit(info, image); 1821 else if ((cinfo->btype == BT_ALPINE || cinfo->btype == BT_SD64) && 1822 op == 0xc) 1823 cfb_imageblit(info, image); 1824 else { 1825 unsigned size = ((image->width + 7) >> 3) * image->height; 1826 int m = info->var.bits_per_pixel; 1827 u32 fg, bg; 1828 1829 if (info->var.bits_per_pixel == 8) { 1830 fg = image->fg_color; 1831 bg = image->bg_color; 1832 } else { 1833 fg = ((u32 *)(info->pseudo_palette))[image->fg_color]; 1834 bg = ((u32 *)(info->pseudo_palette))[image->bg_color]; 1835 } 1836 if (info->var.bits_per_pixel == 24) { 1837 /* clear background first */ 1838 cirrusfb_RectFill(cinfo->regbase, 1839 info->var.bits_per_pixel, 1840 (image->dx * m) / 8, image->dy, 1841 (image->width * m) / 8, 1842 image->height, 1843 bg, bg, 1844 info->fix.line_length, 0x40); 1845 } 1846 cirrusfb_RectFill(cinfo->regbase, 1847 info->var.bits_per_pixel, 1848 (image->dx * m) / 8, image->dy, 1849 (image->width * m) / 8, image->height, 1850 fg, bg, 1851 info->fix.line_length, op); 1852 memcpy(info->screen_base, image->data, size); 1853 } 1854 } 1855 1856 #ifdef CONFIG_PCI 1857 static int release_io_ports; 1858 1859 /* Pulled the logic from XFree86 Cirrus driver to get the memory size, 1860 * based on the DRAM bandwidth bit and DRAM bank switching bit. This 1861 * works with 1MB, 2MB and 4MB configurations (which the Motorola boards 1862 * seem to have. */ 1863 static unsigned int cirrusfb_get_memsize(struct fb_info *info, 1864 u8 __iomem *regbase) 1865 { 1866 unsigned long mem; 1867 struct cirrusfb_info *cinfo = info->par; 1868 1869 if (is_laguna(cinfo)) { 1870 unsigned char SR14 = vga_rseq(regbase, CL_SEQR14); 1871 1872 mem = ((SR14 & 7) + 1) << 20; 1873 } else { 1874 unsigned char SRF = vga_rseq(regbase, CL_SEQRF); 1875 switch ((SRF & 0x18)) { 1876 case 0x08: 1877 mem = 512 * 1024; 1878 break; 1879 case 0x10: 1880 mem = 1024 * 1024; 1881 break; 1882 /* 64-bit DRAM data bus width; assume 2MB. 1883 * Also indicates 2MB memory on the 5430. 1884 */ 1885 case 0x18: 1886 mem = 2048 * 1024; 1887 break; 1888 default: 1889 dev_warn(info->device, "Unknown memory size!\n"); 1890 mem = 1024 * 1024; 1891 } 1892 /* If DRAM bank switching is enabled, there must be 1893 * twice as much memory installed. (4MB on the 5434) 1894 */ 1895 if (cinfo->btype != BT_ALPINE && (SRF & 0x80) != 0) 1896 mem *= 2; 1897 } 1898 1899 /* TODO: Handling of GD5446/5480 (see XF86 sources ...) */ 1900 return mem; 1901 } 1902 1903 static void get_pci_addrs(const struct pci_dev *pdev, 1904 unsigned long *display, unsigned long *registers) 1905 { 1906 assert(pdev != NULL); 1907 assert(display != NULL); 1908 assert(registers != NULL); 1909 1910 *display = 0; 1911 *registers = 0; 1912 1913 /* This is a best-guess for now */ 1914 1915 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) { 1916 *display = pci_resource_start(pdev, 1); 1917 *registers = pci_resource_start(pdev, 0); 1918 } else { 1919 *display = pci_resource_start(pdev, 0); 1920 *registers = pci_resource_start(pdev, 1); 1921 } 1922 1923 assert(*display != 0); 1924 } 1925 1926 static void cirrusfb_pci_unmap(struct fb_info *info) 1927 { 1928 struct pci_dev *pdev = to_pci_dev(info->device); 1929 struct cirrusfb_info *cinfo = info->par; 1930 1931 if (cinfo->laguna_mmio == NULL) 1932 iounmap(cinfo->laguna_mmio); 1933 iounmap(info->screen_base); 1934 #if 0 /* if system didn't claim this region, we would... */ 1935 release_mem_region(0xA0000, 65535); 1936 #endif 1937 if (release_io_ports) 1938 release_region(0x3C0, 32); 1939 pci_release_regions(pdev); 1940 } 1941 #endif /* CONFIG_PCI */ 1942 1943 #ifdef CONFIG_ZORRO 1944 static void cirrusfb_zorro_unmap(struct fb_info *info) 1945 { 1946 struct cirrusfb_info *cinfo = info->par; 1947 struct zorro_dev *zdev = to_zorro_dev(info->device); 1948 1949 if (info->fix.smem_start > 16 * MB_) 1950 iounmap(info->screen_base); 1951 if (info->fix.mmio_start > 16 * MB_) 1952 iounmap(cinfo->regbase); 1953 1954 zorro_release_device(zdev); 1955 } 1956 #endif /* CONFIG_ZORRO */ 1957 1958 /* function table of the above functions */ 1959 static const struct fb_ops cirrusfb_ops = { 1960 .owner = THIS_MODULE, 1961 .fb_open = cirrusfb_open, 1962 .fb_release = cirrusfb_release, 1963 .fb_setcolreg = cirrusfb_setcolreg, 1964 .fb_check_var = cirrusfb_check_var, 1965 .fb_set_par = cirrusfb_set_par, 1966 .fb_pan_display = cirrusfb_pan_display, 1967 .fb_blank = cirrusfb_blank, 1968 .fb_fillrect = cirrusfb_fillrect, 1969 .fb_copyarea = cirrusfb_copyarea, 1970 .fb_sync = cirrusfb_sync, 1971 .fb_imageblit = cirrusfb_imageblit, 1972 }; 1973 1974 static int cirrusfb_set_fbinfo(struct fb_info *info) 1975 { 1976 struct cirrusfb_info *cinfo = info->par; 1977 struct fb_var_screeninfo *var = &info->var; 1978 1979 info->pseudo_palette = cinfo->pseudo_palette; 1980 info->flags = FBINFO_DEFAULT 1981 | FBINFO_HWACCEL_XPAN 1982 | FBINFO_HWACCEL_YPAN 1983 | FBINFO_HWACCEL_FILLRECT 1984 | FBINFO_HWACCEL_IMAGEBLIT 1985 | FBINFO_HWACCEL_COPYAREA; 1986 if (noaccel || is_laguna(cinfo)) { 1987 info->flags |= FBINFO_HWACCEL_DISABLED; 1988 info->fix.accel = FB_ACCEL_NONE; 1989 } else 1990 info->fix.accel = FB_ACCEL_CIRRUS_ALPINE; 1991 1992 info->fbops = &cirrusfb_ops; 1993 1994 if (cinfo->btype == BT_GD5480) { 1995 if (var->bits_per_pixel == 16) 1996 info->screen_base += 1 * MB_; 1997 if (var->bits_per_pixel == 32) 1998 info->screen_base += 2 * MB_; 1999 } 2000 2001 /* Fill fix common fields */ 2002 strscpy(info->fix.id, cirrusfb_board_info[cinfo->btype].name, 2003 sizeof(info->fix.id)); 2004 2005 /* monochrome: only 1 memory plane */ 2006 /* 8 bit and above: Use whole memory area */ 2007 info->fix.smem_len = info->screen_size; 2008 if (var->bits_per_pixel == 1) 2009 info->fix.smem_len /= 4; 2010 info->fix.type_aux = 0; 2011 info->fix.xpanstep = 1; 2012 info->fix.ypanstep = 1; 2013 info->fix.ywrapstep = 0; 2014 2015 /* FIXME: map region at 0xB8000 if available, fill in here */ 2016 info->fix.mmio_len = 0; 2017 2018 fb_alloc_cmap(&info->cmap, 256, 0); 2019 2020 return 0; 2021 } 2022 2023 static int cirrusfb_register(struct fb_info *info) 2024 { 2025 struct cirrusfb_info *cinfo = info->par; 2026 int err; 2027 2028 /* sanity checks */ 2029 assert(cinfo->btype != BT_NONE); 2030 2031 /* set all the vital stuff */ 2032 cirrusfb_set_fbinfo(info); 2033 2034 dev_dbg(info->device, "(RAM start set to: 0x%p)\n", info->screen_base); 2035 2036 err = fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 8); 2037 if (!err) { 2038 dev_dbg(info->device, "wrong initial video mode\n"); 2039 err = -EINVAL; 2040 goto err_dealloc_cmap; 2041 } 2042 2043 info->var.activate = FB_ACTIVATE_NOW; 2044 2045 err = cirrusfb_check_var(&info->var, info); 2046 if (err < 0) { 2047 /* should never happen */ 2048 dev_dbg(info->device, 2049 "choking on default var... umm, no good.\n"); 2050 goto err_dealloc_cmap; 2051 } 2052 2053 err = register_framebuffer(info); 2054 if (err < 0) { 2055 dev_err(info->device, 2056 "could not register fb device; err = %d!\n", err); 2057 goto err_dealloc_cmap; 2058 } 2059 2060 return 0; 2061 2062 err_dealloc_cmap: 2063 fb_dealloc_cmap(&info->cmap); 2064 return err; 2065 } 2066 2067 static void cirrusfb_cleanup(struct fb_info *info) 2068 { 2069 struct cirrusfb_info *cinfo = info->par; 2070 2071 switch_monitor(cinfo, 0); 2072 unregister_framebuffer(info); 2073 fb_dealloc_cmap(&info->cmap); 2074 dev_dbg(info->device, "Framebuffer unregistered\n"); 2075 cinfo->unmap(info); 2076 framebuffer_release(info); 2077 } 2078 2079 #ifdef CONFIG_PCI 2080 static int cirrusfb_pci_register(struct pci_dev *pdev, 2081 const struct pci_device_id *ent) 2082 { 2083 struct cirrusfb_info *cinfo; 2084 struct fb_info *info; 2085 unsigned long board_addr, board_size; 2086 int ret; 2087 2088 ret = pci_enable_device(pdev); 2089 if (ret < 0) { 2090 printk(KERN_ERR "cirrusfb: Cannot enable PCI device\n"); 2091 goto err_out; 2092 } 2093 2094 info = framebuffer_alloc(sizeof(struct cirrusfb_info), &pdev->dev); 2095 if (!info) { 2096 ret = -ENOMEM; 2097 goto err_out; 2098 } 2099 2100 cinfo = info->par; 2101 cinfo->btype = (enum cirrus_board) ent->driver_data; 2102 2103 dev_dbg(info->device, 2104 " Found PCI device, base address 0 is 0x%Lx, btype set to %d\n", 2105 (unsigned long long)pdev->resource[0].start, cinfo->btype); 2106 dev_dbg(info->device, " base address 1 is 0x%Lx\n", 2107 (unsigned long long)pdev->resource[1].start); 2108 2109 dev_dbg(info->device, 2110 "Attempt to get PCI info for Cirrus Graphics Card\n"); 2111 get_pci_addrs(pdev, &board_addr, &info->fix.mmio_start); 2112 /* FIXME: this forces VGA. alternatives? */ 2113 cinfo->regbase = NULL; 2114 cinfo->laguna_mmio = ioremap(info->fix.mmio_start, 0x1000); 2115 2116 dev_dbg(info->device, "Board address: 0x%lx, register address: 0x%lx\n", 2117 board_addr, info->fix.mmio_start); 2118 2119 board_size = (cinfo->btype == BT_GD5480) ? 2120 32 * MB_ : cirrusfb_get_memsize(info, cinfo->regbase); 2121 2122 ret = pci_request_regions(pdev, "cirrusfb"); 2123 if (ret < 0) { 2124 dev_err(info->device, "cannot reserve region 0x%lx, abort\n", 2125 board_addr); 2126 goto err_release_fb; 2127 } 2128 #if 0 /* if the system didn't claim this region, we would... */ 2129 if (!request_mem_region(0xA0000, 65535, "cirrusfb")) { 2130 dev_err(info->device, "cannot reserve region 0x%lx, abort\n", 2131 0xA0000L); 2132 ret = -EBUSY; 2133 goto err_release_regions; 2134 } 2135 #endif 2136 if (request_region(0x3C0, 32, "cirrusfb")) 2137 release_io_ports = 1; 2138 2139 info->screen_base = ioremap(board_addr, board_size); 2140 if (!info->screen_base) { 2141 ret = -EIO; 2142 goto err_release_legacy; 2143 } 2144 2145 info->fix.smem_start = board_addr; 2146 info->screen_size = board_size; 2147 cinfo->unmap = cirrusfb_pci_unmap; 2148 2149 dev_info(info->device, 2150 "Cirrus Logic chipset on PCI bus, RAM (%lu kB) at 0x%lx\n", 2151 info->screen_size >> 10, board_addr); 2152 pci_set_drvdata(pdev, info); 2153 2154 ret = cirrusfb_register(info); 2155 if (!ret) 2156 return 0; 2157 2158 iounmap(info->screen_base); 2159 err_release_legacy: 2160 if (release_io_ports) 2161 release_region(0x3C0, 32); 2162 #if 0 2163 release_mem_region(0xA0000, 65535); 2164 err_release_regions: 2165 #endif 2166 pci_release_regions(pdev); 2167 err_release_fb: 2168 if (cinfo->laguna_mmio != NULL) 2169 iounmap(cinfo->laguna_mmio); 2170 framebuffer_release(info); 2171 err_out: 2172 return ret; 2173 } 2174 2175 static void cirrusfb_pci_unregister(struct pci_dev *pdev) 2176 { 2177 struct fb_info *info = pci_get_drvdata(pdev); 2178 2179 cirrusfb_cleanup(info); 2180 } 2181 2182 static struct pci_driver cirrusfb_pci_driver = { 2183 .name = "cirrusfb", 2184 .id_table = cirrusfb_pci_table, 2185 .probe = cirrusfb_pci_register, 2186 .remove = cirrusfb_pci_unregister, 2187 }; 2188 #endif /* CONFIG_PCI */ 2189 2190 #ifdef CONFIG_ZORRO 2191 static int cirrusfb_zorro_register(struct zorro_dev *z, 2192 const struct zorro_device_id *ent) 2193 { 2194 struct fb_info *info; 2195 int error; 2196 const struct zorrocl *zcl; 2197 enum cirrus_board btype; 2198 unsigned long regbase, ramsize, rambase; 2199 struct cirrusfb_info *cinfo; 2200 2201 info = framebuffer_alloc(sizeof(struct cirrusfb_info), &z->dev); 2202 if (!info) 2203 return -ENOMEM; 2204 2205 zcl = (const struct zorrocl *)ent->driver_data; 2206 btype = zcl->type; 2207 regbase = zorro_resource_start(z) + zcl->regoffset; 2208 ramsize = zcl->ramsize; 2209 if (ramsize) { 2210 rambase = zorro_resource_start(z) + zcl->ramoffset; 2211 if (zorro_resource_len(z) == 64 * MB_) { 2212 /* Quirk for 64 MiB Picasso IV */ 2213 rambase += zcl->ramoffset; 2214 } 2215 } else { 2216 struct zorro_dev *ram = zorro_find_device(zcl->ramid, NULL); 2217 if (!ram || !zorro_resource_len(ram)) { 2218 dev_err(info->device, "No video RAM found\n"); 2219 error = -ENODEV; 2220 goto err_release_fb; 2221 } 2222 rambase = zorro_resource_start(ram); 2223 ramsize = zorro_resource_len(ram); 2224 if (zcl->ramid2 && 2225 (ram = zorro_find_device(zcl->ramid2, NULL))) { 2226 if (zorro_resource_start(ram) != rambase + ramsize) { 2227 dev_warn(info->device, 2228 "Skipping non-contiguous RAM at %pR\n", 2229 &ram->resource); 2230 } else { 2231 ramsize += zorro_resource_len(ram); 2232 } 2233 } 2234 } 2235 2236 dev_info(info->device, 2237 "%s board detected, REG at 0x%lx, %lu MiB RAM at 0x%lx\n", 2238 cirrusfb_board_info[btype].name, regbase, ramsize / MB_, 2239 rambase); 2240 2241 if (!zorro_request_device(z, "cirrusfb")) { 2242 dev_err(info->device, "Cannot reserve %pR\n", &z->resource); 2243 error = -EBUSY; 2244 goto err_release_fb; 2245 } 2246 2247 cinfo = info->par; 2248 cinfo->btype = btype; 2249 2250 info->fix.mmio_start = regbase; 2251 cinfo->regbase = regbase > 16 * MB_ ? ioremap(regbase, 64 * 1024) 2252 : ZTWO_VADDR(regbase); 2253 if (!cinfo->regbase) { 2254 dev_err(info->device, "Cannot map registers\n"); 2255 error = -EIO; 2256 goto err_release_dev; 2257 } 2258 2259 info->fix.smem_start = rambase; 2260 info->screen_size = ramsize; 2261 info->screen_base = rambase > 16 * MB_ ? ioremap(rambase, ramsize) 2262 : ZTWO_VADDR(rambase); 2263 if (!info->screen_base) { 2264 dev_err(info->device, "Cannot map video RAM\n"); 2265 error = -EIO; 2266 goto err_unmap_reg; 2267 } 2268 2269 cinfo->unmap = cirrusfb_zorro_unmap; 2270 2271 dev_info(info->device, 2272 "Cirrus Logic chipset on Zorro bus, RAM (%lu MiB) at 0x%lx\n", 2273 ramsize / MB_, rambase); 2274 2275 /* MCLK select etc. */ 2276 if (cirrusfb_board_info[btype].init_sr1f) 2277 vga_wseq(cinfo->regbase, CL_SEQR1F, 2278 cirrusfb_board_info[btype].sr1f); 2279 2280 error = cirrusfb_register(info); 2281 if (error) { 2282 dev_err(info->device, "Failed to register device, error %d\n", 2283 error); 2284 goto err_unmap_ram; 2285 } 2286 2287 zorro_set_drvdata(z, info); 2288 return 0; 2289 2290 err_unmap_ram: 2291 if (rambase > 16 * MB_) 2292 iounmap(info->screen_base); 2293 2294 err_unmap_reg: 2295 if (regbase > 16 * MB_) 2296 iounmap(cinfo->regbase); 2297 err_release_dev: 2298 zorro_release_device(z); 2299 err_release_fb: 2300 framebuffer_release(info); 2301 return error; 2302 } 2303 2304 static void cirrusfb_zorro_unregister(struct zorro_dev *z) 2305 { 2306 struct fb_info *info = zorro_get_drvdata(z); 2307 2308 cirrusfb_cleanup(info); 2309 zorro_set_drvdata(z, NULL); 2310 } 2311 2312 static struct zorro_driver cirrusfb_zorro_driver = { 2313 .name = "cirrusfb", 2314 .id_table = cirrusfb_zorro_table, 2315 .probe = cirrusfb_zorro_register, 2316 .remove = cirrusfb_zorro_unregister, 2317 }; 2318 #endif /* CONFIG_ZORRO */ 2319 2320 #ifndef MODULE 2321 static int __init cirrusfb_setup(char *options) 2322 { 2323 char *this_opt; 2324 2325 if (!options || !*options) 2326 return 0; 2327 2328 while ((this_opt = strsep(&options, ",")) != NULL) { 2329 if (!*this_opt) 2330 continue; 2331 2332 if (!strcmp(this_opt, "noaccel")) 2333 noaccel = 1; 2334 else if (!strncmp(this_opt, "mode:", 5)) 2335 mode_option = this_opt + 5; 2336 else 2337 mode_option = this_opt; 2338 } 2339 return 0; 2340 } 2341 #endif 2342 2343 /* 2344 * Modularization 2345 */ 2346 2347 MODULE_AUTHOR("Copyright 1999,2000 Jeff Garzik <jgarzik@pobox.com>"); 2348 MODULE_DESCRIPTION("Accelerated FBDev driver for Cirrus Logic chips"); 2349 MODULE_LICENSE("GPL"); 2350 2351 static int __init cirrusfb_init(void) 2352 { 2353 int error = 0; 2354 2355 #ifndef MODULE 2356 char *option = NULL; 2357 2358 if (fb_get_options("cirrusfb", &option)) 2359 return -ENODEV; 2360 cirrusfb_setup(option); 2361 #endif 2362 2363 #ifdef CONFIG_ZORRO 2364 error |= zorro_register_driver(&cirrusfb_zorro_driver); 2365 #endif 2366 #ifdef CONFIG_PCI 2367 error |= pci_register_driver(&cirrusfb_pci_driver); 2368 #endif 2369 return error; 2370 } 2371 2372 static void __exit cirrusfb_exit(void) 2373 { 2374 #ifdef CONFIG_PCI 2375 pci_unregister_driver(&cirrusfb_pci_driver); 2376 #endif 2377 #ifdef CONFIG_ZORRO 2378 zorro_unregister_driver(&cirrusfb_zorro_driver); 2379 #endif 2380 } 2381 2382 module_init(cirrusfb_init); 2383 2384 module_param(mode_option, charp, 0); 2385 MODULE_PARM_DESC(mode_option, "Initial video mode e.g. '648x480-8@60'"); 2386 module_param(noaccel, bool, 0); 2387 MODULE_PARM_DESC(noaccel, "Disable acceleration"); 2388 2389 #ifdef MODULE 2390 module_exit(cirrusfb_exit); 2391 #endif 2392 2393 /**********************************************************************/ 2394 /* about the following functions - I have used the same names for the */ 2395 /* functions as Markus Wild did in his Retina driver for NetBSD as */ 2396 /* they just made sense for this purpose. Apart from that, I wrote */ 2397 /* these functions myself. */ 2398 /**********************************************************************/ 2399 2400 /*** WGen() - write into one of the external/general registers ***/ 2401 static void WGen(const struct cirrusfb_info *cinfo, 2402 int regnum, unsigned char val) 2403 { 2404 unsigned long regofs = 0; 2405 2406 if (cinfo->btype == BT_PICASSO) { 2407 /* Picasso II specific hack */ 2408 /* if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D || 2409 regnum == CL_VSSM2) */ 2410 if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D) 2411 regofs = 0xfff; 2412 } 2413 2414 vga_w(cinfo->regbase, regofs + regnum, val); 2415 } 2416 2417 /*** RGen() - read out one of the external/general registers ***/ 2418 static unsigned char RGen(const struct cirrusfb_info *cinfo, int regnum) 2419 { 2420 unsigned long regofs = 0; 2421 2422 if (cinfo->btype == BT_PICASSO) { 2423 /* Picasso II specific hack */ 2424 /* if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D || 2425 regnum == CL_VSSM2) */ 2426 if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D) 2427 regofs = 0xfff; 2428 } 2429 2430 return vga_r(cinfo->regbase, regofs + regnum); 2431 } 2432 2433 /*** AttrOn() - turn on VideoEnable for Attribute controller ***/ 2434 static void AttrOn(const struct cirrusfb_info *cinfo) 2435 { 2436 assert(cinfo != NULL); 2437 2438 if (vga_rcrt(cinfo->regbase, CL_CRT24) & 0x80) { 2439 /* if we're just in "write value" mode, write back the */ 2440 /* same value as before to not modify anything */ 2441 vga_w(cinfo->regbase, VGA_ATT_IW, 2442 vga_r(cinfo->regbase, VGA_ATT_R)); 2443 } 2444 /* turn on video bit */ 2445 /* vga_w(cinfo->regbase, VGA_ATT_IW, 0x20); */ 2446 vga_w(cinfo->regbase, VGA_ATT_IW, 0x33); 2447 2448 /* dummy write on Reg0 to be on "write index" mode next time */ 2449 vga_w(cinfo->regbase, VGA_ATT_IW, 0x00); 2450 } 2451 2452 /*** WHDR() - write into the Hidden DAC register ***/ 2453 /* as the HDR is the only extension register that requires special treatment 2454 * (the other extension registers are accessible just like the "ordinary" 2455 * registers of their functional group) here is a specialized routine for 2456 * accessing the HDR 2457 */ 2458 static void WHDR(const struct cirrusfb_info *cinfo, unsigned char val) 2459 { 2460 if (is_laguna(cinfo)) 2461 return; 2462 if (cinfo->btype == BT_PICASSO) { 2463 /* Klaus' hint for correct access to HDR on some boards */ 2464 /* first write 0 to pixel mask (3c6) */ 2465 WGen(cinfo, VGA_PEL_MSK, 0x00); 2466 udelay(200); 2467 /* next read dummy from pixel address (3c8) */ 2468 RGen(cinfo, VGA_PEL_IW); 2469 udelay(200); 2470 } 2471 /* now do the usual stuff to access the HDR */ 2472 2473 RGen(cinfo, VGA_PEL_MSK); 2474 udelay(200); 2475 RGen(cinfo, VGA_PEL_MSK); 2476 udelay(200); 2477 RGen(cinfo, VGA_PEL_MSK); 2478 udelay(200); 2479 RGen(cinfo, VGA_PEL_MSK); 2480 udelay(200); 2481 2482 WGen(cinfo, VGA_PEL_MSK, val); 2483 udelay(200); 2484 2485 if (cinfo->btype == BT_PICASSO) { 2486 /* now first reset HDR access counter */ 2487 RGen(cinfo, VGA_PEL_IW); 2488 udelay(200); 2489 2490 /* and at the end, restore the mask value */ 2491 /* ## is this mask always 0xff? */ 2492 WGen(cinfo, VGA_PEL_MSK, 0xff); 2493 udelay(200); 2494 } 2495 } 2496 2497 /*** WSFR() - write to the "special function register" (SFR) ***/ 2498 static void WSFR(struct cirrusfb_info *cinfo, unsigned char val) 2499 { 2500 #ifdef CONFIG_ZORRO 2501 assert(cinfo->regbase != NULL); 2502 cinfo->SFR = val; 2503 z_writeb(val, cinfo->regbase + 0x8000); 2504 #endif 2505 } 2506 2507 /* The Picasso has a second register for switching the monitor bit */ 2508 static void WSFR2(struct cirrusfb_info *cinfo, unsigned char val) 2509 { 2510 #ifdef CONFIG_ZORRO 2511 /* writing an arbitrary value to this one causes the monitor switcher */ 2512 /* to flip to Amiga display */ 2513 assert(cinfo->regbase != NULL); 2514 cinfo->SFR = val; 2515 z_writeb(val, cinfo->regbase + 0x9000); 2516 #endif 2517 } 2518 2519 /*** WClut - set CLUT entry (range: 0..63) ***/ 2520 static void WClut(struct cirrusfb_info *cinfo, unsigned char regnum, unsigned char red, 2521 unsigned char green, unsigned char blue) 2522 { 2523 unsigned int data = VGA_PEL_D; 2524 2525 /* address write mode register is not translated.. */ 2526 vga_w(cinfo->regbase, VGA_PEL_IW, regnum); 2527 2528 if (cinfo->btype == BT_PICASSO || cinfo->btype == BT_PICASSO4 || 2529 cinfo->btype == BT_ALPINE || cinfo->btype == BT_GD5480 || 2530 cinfo->btype == BT_SD64 || is_laguna(cinfo)) { 2531 /* but DAC data register IS, at least for Picasso II */ 2532 if (cinfo->btype == BT_PICASSO) 2533 data += 0xfff; 2534 vga_w(cinfo->regbase, data, red); 2535 vga_w(cinfo->regbase, data, green); 2536 vga_w(cinfo->regbase, data, blue); 2537 } else { 2538 vga_w(cinfo->regbase, data, blue); 2539 vga_w(cinfo->regbase, data, green); 2540 vga_w(cinfo->regbase, data, red); 2541 } 2542 } 2543 2544 #if 0 2545 /*** RClut - read CLUT entry (range 0..63) ***/ 2546 static void RClut(struct cirrusfb_info *cinfo, unsigned char regnum, unsigned char *red, 2547 unsigned char *green, unsigned char *blue) 2548 { 2549 unsigned int data = VGA_PEL_D; 2550 2551 vga_w(cinfo->regbase, VGA_PEL_IR, regnum); 2552 2553 if (cinfo->btype == BT_PICASSO || cinfo->btype == BT_PICASSO4 || 2554 cinfo->btype == BT_ALPINE || cinfo->btype == BT_GD5480) { 2555 if (cinfo->btype == BT_PICASSO) 2556 data += 0xfff; 2557 *red = vga_r(cinfo->regbase, data); 2558 *green = vga_r(cinfo->regbase, data); 2559 *blue = vga_r(cinfo->regbase, data); 2560 } else { 2561 *blue = vga_r(cinfo->regbase, data); 2562 *green = vga_r(cinfo->regbase, data); 2563 *red = vga_r(cinfo->regbase, data); 2564 } 2565 } 2566 #endif 2567 2568 /******************************************************************* 2569 cirrusfb_WaitBLT() 2570 2571 Wait for the BitBLT engine to complete a possible earlier job 2572 *********************************************************************/ 2573 2574 /* FIXME: use interrupts instead */ 2575 static void cirrusfb_WaitBLT(u8 __iomem *regbase) 2576 { 2577 while (vga_rgfx(regbase, CL_GR31) & 0x08) 2578 cpu_relax(); 2579 } 2580 2581 /******************************************************************* 2582 cirrusfb_BitBLT() 2583 2584 perform accelerated "scrolling" 2585 ********************************************************************/ 2586 2587 static void cirrusfb_set_blitter(u8 __iomem *regbase, 2588 u_short nwidth, u_short nheight, 2589 u_long nsrc, u_long ndest, 2590 u_short bltmode, u_short line_length) 2591 2592 { 2593 /* pitch: set to line_length */ 2594 /* dest pitch low */ 2595 vga_wgfx(regbase, CL_GR24, line_length & 0xff); 2596 /* dest pitch hi */ 2597 vga_wgfx(regbase, CL_GR25, line_length >> 8); 2598 /* source pitch low */ 2599 vga_wgfx(regbase, CL_GR26, line_length & 0xff); 2600 /* source pitch hi */ 2601 vga_wgfx(regbase, CL_GR27, line_length >> 8); 2602 2603 /* BLT width: actual number of pixels - 1 */ 2604 /* BLT width low */ 2605 vga_wgfx(regbase, CL_GR20, nwidth & 0xff); 2606 /* BLT width hi */ 2607 vga_wgfx(regbase, CL_GR21, nwidth >> 8); 2608 2609 /* BLT height: actual number of lines -1 */ 2610 /* BLT height low */ 2611 vga_wgfx(regbase, CL_GR22, nheight & 0xff); 2612 /* BLT width hi */ 2613 vga_wgfx(regbase, CL_GR23, nheight >> 8); 2614 2615 /* BLT destination */ 2616 /* BLT dest low */ 2617 vga_wgfx(regbase, CL_GR28, (u_char) (ndest & 0xff)); 2618 /* BLT dest mid */ 2619 vga_wgfx(regbase, CL_GR29, (u_char) (ndest >> 8)); 2620 /* BLT dest hi */ 2621 vga_wgfx(regbase, CL_GR2A, (u_char) (ndest >> 16)); 2622 2623 /* BLT source */ 2624 /* BLT src low */ 2625 vga_wgfx(regbase, CL_GR2C, (u_char) (nsrc & 0xff)); 2626 /* BLT src mid */ 2627 vga_wgfx(regbase, CL_GR2D, (u_char) (nsrc >> 8)); 2628 /* BLT src hi */ 2629 vga_wgfx(regbase, CL_GR2E, (u_char) (nsrc >> 16)); 2630 2631 /* BLT mode */ 2632 vga_wgfx(regbase, CL_GR30, bltmode); /* BLT mode */ 2633 2634 /* BLT ROP: SrcCopy */ 2635 vga_wgfx(regbase, CL_GR32, 0x0d); /* BLT ROP */ 2636 2637 /* and finally: GO! */ 2638 vga_wgfx(regbase, CL_GR31, 0x02); /* BLT Start/status */ 2639 } 2640 2641 /******************************************************************* 2642 cirrusfb_BitBLT() 2643 2644 perform accelerated "scrolling" 2645 ********************************************************************/ 2646 2647 static void cirrusfb_BitBLT(u8 __iomem *regbase, int bits_per_pixel, 2648 u_short curx, u_short cury, 2649 u_short destx, u_short desty, 2650 u_short width, u_short height, 2651 u_short line_length) 2652 { 2653 u_short nwidth = width - 1; 2654 u_short nheight = height - 1; 2655 u_long nsrc, ndest; 2656 u_char bltmode; 2657 2658 bltmode = 0x00; 2659 /* if source adr < dest addr, do the Blt backwards */ 2660 if (cury <= desty) { 2661 if (cury == desty) { 2662 /* if src and dest are on the same line, check x */ 2663 if (curx < destx) 2664 bltmode |= 0x01; 2665 } else 2666 bltmode |= 0x01; 2667 } 2668 /* standard case: forward blitting */ 2669 nsrc = (cury * line_length) + curx; 2670 ndest = (desty * line_length) + destx; 2671 if (bltmode) { 2672 /* this means start addresses are at the end, 2673 * counting backwards 2674 */ 2675 nsrc += nheight * line_length + nwidth; 2676 ndest += nheight * line_length + nwidth; 2677 } 2678 2679 cirrusfb_WaitBLT(regbase); 2680 2681 cirrusfb_set_blitter(regbase, nwidth, nheight, 2682 nsrc, ndest, bltmode, line_length); 2683 } 2684 2685 /******************************************************************* 2686 cirrusfb_RectFill() 2687 2688 perform accelerated rectangle fill 2689 ********************************************************************/ 2690 2691 static void cirrusfb_RectFill(u8 __iomem *regbase, int bits_per_pixel, 2692 u_short x, u_short y, u_short width, u_short height, 2693 u32 fg_color, u32 bg_color, u_short line_length, 2694 u_char blitmode) 2695 { 2696 u_long ndest = (y * line_length) + x; 2697 u_char op; 2698 2699 cirrusfb_WaitBLT(regbase); 2700 2701 /* This is a ColorExpand Blt, using the */ 2702 /* same color for foreground and background */ 2703 vga_wgfx(regbase, VGA_GFX_SR_VALUE, bg_color); 2704 vga_wgfx(regbase, VGA_GFX_SR_ENABLE, fg_color); 2705 2706 op = 0x80; 2707 if (bits_per_pixel >= 16) { 2708 vga_wgfx(regbase, CL_GR10, bg_color >> 8); 2709 vga_wgfx(regbase, CL_GR11, fg_color >> 8); 2710 op = 0x90; 2711 } 2712 if (bits_per_pixel >= 24) { 2713 vga_wgfx(regbase, CL_GR12, bg_color >> 16); 2714 vga_wgfx(regbase, CL_GR13, fg_color >> 16); 2715 op = 0xa0; 2716 } 2717 if (bits_per_pixel == 32) { 2718 vga_wgfx(regbase, CL_GR14, bg_color >> 24); 2719 vga_wgfx(regbase, CL_GR15, fg_color >> 24); 2720 op = 0xb0; 2721 } 2722 cirrusfb_set_blitter(regbase, width - 1, height - 1, 2723 0, ndest, op | blitmode, line_length); 2724 } 2725 2726 /************************************************************************** 2727 * bestclock() - determine closest possible clock lower(?) than the 2728 * desired pixel clock 2729 **************************************************************************/ 2730 static void bestclock(long freq, int *nom, int *den, int *div) 2731 { 2732 int n, d; 2733 long h, diff; 2734 2735 assert(nom != NULL); 2736 assert(den != NULL); 2737 assert(div != NULL); 2738 2739 *nom = 0; 2740 *den = 0; 2741 *div = 0; 2742 2743 if (freq < 8000) 2744 freq = 8000; 2745 2746 diff = freq; 2747 2748 for (n = 32; n < 128; n++) { 2749 int s = 0; 2750 2751 d = (14318 * n) / freq; 2752 if ((d >= 7) && (d <= 63)) { 2753 int temp = d; 2754 2755 if (temp > 31) { 2756 s = 1; 2757 temp >>= 1; 2758 } 2759 h = ((14318 * n) / temp) >> s; 2760 h = h > freq ? h - freq : freq - h; 2761 if (h < diff) { 2762 diff = h; 2763 *nom = n; 2764 *den = temp; 2765 *div = s; 2766 } 2767 } 2768 d++; 2769 if ((d >= 7) && (d <= 63)) { 2770 if (d > 31) { 2771 s = 1; 2772 d >>= 1; 2773 } 2774 h = ((14318 * n) / d) >> s; 2775 h = h > freq ? h - freq : freq - h; 2776 if (h < diff) { 2777 diff = h; 2778 *nom = n; 2779 *den = d; 2780 *div = s; 2781 } 2782 } 2783 } 2784 } 2785 2786 /* ------------------------------------------------------------------------- 2787 * 2788 * debugging functions 2789 * 2790 * ------------------------------------------------------------------------- 2791 */ 2792 2793 #ifdef CIRRUSFB_DEBUG 2794 2795 /* 2796 * cirrusfb_dbg_print_regs 2797 * @regbase: If using newmmio, the newmmio base address, otherwise %NULL 2798 * @reg_class: type of registers to read: %CRT, or %SEQ 2799 * 2800 * DESCRIPTION: 2801 * Dumps the given list of VGA CRTC registers. If @base is %NULL, 2802 * old-style I/O ports are queried for information, otherwise MMIO is 2803 * used at the given @base address to query the information. 2804 */ 2805 2806 static void cirrusfb_dbg_print_regs(struct fb_info *info, 2807 caddr_t regbase, 2808 enum cirrusfb_dbg_reg_class reg_class, ...) 2809 { 2810 va_list list; 2811 unsigned char val = 0; 2812 unsigned reg; 2813 char *name; 2814 2815 va_start(list, reg_class); 2816 2817 name = va_arg(list, char *); 2818 while (name != NULL) { 2819 reg = va_arg(list, int); 2820 2821 switch (reg_class) { 2822 case CRT: 2823 val = vga_rcrt(regbase, (unsigned char) reg); 2824 break; 2825 case SEQ: 2826 val = vga_rseq(regbase, (unsigned char) reg); 2827 break; 2828 default: 2829 /* should never occur */ 2830 assert(false); 2831 break; 2832 } 2833 2834 dev_dbg(info->device, "%8s = 0x%02X\n", name, val); 2835 2836 name = va_arg(list, char *); 2837 } 2838 2839 va_end(list); 2840 } 2841 2842 /* 2843 * cirrusfb_dbg_reg_dump 2844 * @base: If using newmmio, the newmmio base address, otherwise %NULL 2845 * 2846 * DESCRIPTION: 2847 * Dumps a list of interesting VGA and CIRRUSFB registers. If @base is %NULL, 2848 * old-style I/O ports are queried for information, otherwise MMIO is 2849 * used at the given @base address to query the information. 2850 */ 2851 2852 static void cirrusfb_dbg_reg_dump(struct fb_info *info, caddr_t regbase) 2853 { 2854 dev_dbg(info->device, "VGA CRTC register dump:\n"); 2855 2856 cirrusfb_dbg_print_regs(info, regbase, CRT, 2857 "CR00", 0x00, 2858 "CR01", 0x01, 2859 "CR02", 0x02, 2860 "CR03", 0x03, 2861 "CR04", 0x04, 2862 "CR05", 0x05, 2863 "CR06", 0x06, 2864 "CR07", 0x07, 2865 "CR08", 0x08, 2866 "CR09", 0x09, 2867 "CR0A", 0x0A, 2868 "CR0B", 0x0B, 2869 "CR0C", 0x0C, 2870 "CR0D", 0x0D, 2871 "CR0E", 0x0E, 2872 "CR0F", 0x0F, 2873 "CR10", 0x10, 2874 "CR11", 0x11, 2875 "CR12", 0x12, 2876 "CR13", 0x13, 2877 "CR14", 0x14, 2878 "CR15", 0x15, 2879 "CR16", 0x16, 2880 "CR17", 0x17, 2881 "CR18", 0x18, 2882 "CR22", 0x22, 2883 "CR24", 0x24, 2884 "CR26", 0x26, 2885 "CR2D", 0x2D, 2886 "CR2E", 0x2E, 2887 "CR2F", 0x2F, 2888 "CR30", 0x30, 2889 "CR31", 0x31, 2890 "CR32", 0x32, 2891 "CR33", 0x33, 2892 "CR34", 0x34, 2893 "CR35", 0x35, 2894 "CR36", 0x36, 2895 "CR37", 0x37, 2896 "CR38", 0x38, 2897 "CR39", 0x39, 2898 "CR3A", 0x3A, 2899 "CR3B", 0x3B, 2900 "CR3C", 0x3C, 2901 "CR3D", 0x3D, 2902 "CR3E", 0x3E, 2903 "CR3F", 0x3F, 2904 NULL); 2905 2906 dev_dbg(info->device, "\n"); 2907 2908 dev_dbg(info->device, "VGA SEQ register dump:\n"); 2909 2910 cirrusfb_dbg_print_regs(info, regbase, SEQ, 2911 "SR00", 0x00, 2912 "SR01", 0x01, 2913 "SR02", 0x02, 2914 "SR03", 0x03, 2915 "SR04", 0x04, 2916 "SR08", 0x08, 2917 "SR09", 0x09, 2918 "SR0A", 0x0A, 2919 "SR0B", 0x0B, 2920 "SR0D", 0x0D, 2921 "SR10", 0x10, 2922 "SR11", 0x11, 2923 "SR12", 0x12, 2924 "SR13", 0x13, 2925 "SR14", 0x14, 2926 "SR15", 0x15, 2927 "SR16", 0x16, 2928 "SR17", 0x17, 2929 "SR18", 0x18, 2930 "SR19", 0x19, 2931 "SR1A", 0x1A, 2932 "SR1B", 0x1B, 2933 "SR1C", 0x1C, 2934 "SR1D", 0x1D, 2935 "SR1E", 0x1E, 2936 "SR1F", 0x1F, 2937 NULL); 2938 2939 dev_dbg(info->device, "\n"); 2940 } 2941 2942 #endif /* CIRRUSFB_DEBUG */ 2943 2944