1 /* leo.c: LEO frame buffer driver 2 * 3 * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net) 4 * Copyright (C) 1996-1999 Jakub Jelinek (jj@ultra.linux.cz) 5 * Copyright (C) 1997 Michal Rehacek (Michal.Rehacek@st.mff.cuni.cz) 6 * 7 * Driver layout based loosely on tgafb.c, see that file for credits. 8 */ 9 10 #include <linux/module.h> 11 #include <linux/kernel.h> 12 #include <linux/errno.h> 13 #include <linux/string.h> 14 #include <linux/delay.h> 15 #include <linux/init.h> 16 #include <linux/fb.h> 17 #include <linux/mm.h> 18 #include <linux/of_device.h> 19 #include <linux/io.h> 20 21 #include <asm/fbio.h> 22 23 #include "sbuslib.h" 24 25 /* 26 * Local functions. 27 */ 28 29 static int leo_setcolreg(unsigned, unsigned, unsigned, unsigned, 30 unsigned, struct fb_info *); 31 static int leo_blank(int, struct fb_info *); 32 33 static int leo_mmap(struct fb_info *, struct vm_area_struct *); 34 static int leo_ioctl(struct fb_info *, unsigned int, unsigned long); 35 static int leo_pan_display(struct fb_var_screeninfo *, struct fb_info *); 36 37 /* 38 * Frame buffer operations 39 */ 40 41 static struct fb_ops leo_ops = { 42 .owner = THIS_MODULE, 43 .fb_setcolreg = leo_setcolreg, 44 .fb_blank = leo_blank, 45 .fb_pan_display = leo_pan_display, 46 .fb_fillrect = cfb_fillrect, 47 .fb_copyarea = cfb_copyarea, 48 .fb_imageblit = cfb_imageblit, 49 .fb_mmap = leo_mmap, 50 .fb_ioctl = leo_ioctl, 51 #ifdef CONFIG_COMPAT 52 .fb_compat_ioctl = sbusfb_compat_ioctl, 53 #endif 54 }; 55 56 #define LEO_OFF_LC_SS0_KRN 0x00200000UL 57 #define LEO_OFF_LC_SS0_USR 0x00201000UL 58 #define LEO_OFF_LC_SS1_KRN 0x01200000UL 59 #define LEO_OFF_LC_SS1_USR 0x01201000UL 60 #define LEO_OFF_LD_SS0 0x00400000UL 61 #define LEO_OFF_LD_SS1 0x01400000UL 62 #define LEO_OFF_LD_GBL 0x00401000UL 63 #define LEO_OFF_LX_KRN 0x00600000UL 64 #define LEO_OFF_LX_CURSOR 0x00601000UL 65 #define LEO_OFF_SS0 0x00800000UL 66 #define LEO_OFF_SS1 0x01800000UL 67 #define LEO_OFF_UNK 0x00602000UL 68 #define LEO_OFF_UNK2 0x00000000UL 69 70 #define LEO_CUR_ENABLE 0x00000080 71 #define LEO_CUR_UPDATE 0x00000030 72 #define LEO_CUR_PROGRESS 0x00000006 73 #define LEO_CUR_UPDATECMAP 0x00000003 74 75 #define LEO_CUR_TYPE_MASK 0x00000000 76 #define LEO_CUR_TYPE_IMAGE 0x00000020 77 #define LEO_CUR_TYPE_CMAP 0x00000050 78 79 struct leo_cursor { 80 u8 xxx0[16]; 81 u32 cur_type; 82 u32 cur_misc; 83 u32 cur_cursxy; 84 u32 cur_data; 85 }; 86 87 #define LEO_KRN_TYPE_CLUT0 0x00001000 88 #define LEO_KRN_TYPE_CLUT1 0x00001001 89 #define LEO_KRN_TYPE_CLUT2 0x00001002 90 #define LEO_KRN_TYPE_WID 0x00001003 91 #define LEO_KRN_TYPE_UNK 0x00001006 92 #define LEO_KRN_TYPE_VIDEO 0x00002003 93 #define LEO_KRN_TYPE_CLUTDATA 0x00004000 94 #define LEO_KRN_CSR_ENABLE 0x00000008 95 #define LEO_KRN_CSR_PROGRESS 0x00000004 96 #define LEO_KRN_CSR_UNK 0x00000002 97 #define LEO_KRN_CSR_UNK2 0x00000001 98 99 struct leo_lx_krn { 100 u32 krn_type; 101 u32 krn_csr; 102 u32 krn_value; 103 }; 104 105 struct leo_lc_ss0_krn { 106 u32 misc; 107 u8 xxx0[0x800-4]; 108 u32 rev; 109 }; 110 111 struct leo_lc_ss0_usr { 112 u32 csr; 113 u32 addrspace; 114 u32 fontmsk; 115 u32 fontt; 116 u32 extent; 117 u32 src; 118 u32 dst; 119 u32 copy; 120 u32 fill; 121 }; 122 123 struct leo_lc_ss1_krn { 124 u8 unknown; 125 }; 126 127 struct leo_lc_ss1_usr { 128 u8 unknown; 129 }; 130 131 struct leo_ld_ss0 { 132 u8 xxx0[0xe00]; 133 u32 csr; 134 u32 wid; 135 u32 wmask; 136 u32 widclip; 137 u32 vclipmin; 138 u32 vclipmax; 139 u32 pickmin; /* SS1 only */ 140 u32 pickmax; /* SS1 only */ 141 u32 fg; 142 u32 bg; 143 u32 src; /* Copy/Scroll (SS0 only) */ 144 u32 dst; /* Copy/Scroll/Fill (SS0 only) */ 145 u32 extent; /* Copy/Scroll/Fill size (SS0 only) */ 146 u32 xxx1[3]; 147 u32 setsem; /* SS1 only */ 148 u32 clrsem; /* SS1 only */ 149 u32 clrpick; /* SS1 only */ 150 u32 clrdat; /* SS1 only */ 151 u32 alpha; /* SS1 only */ 152 u8 xxx2[0x2c]; 153 u32 winbg; 154 u32 planemask; 155 u32 rop; 156 u32 z; 157 u32 dczf; /* SS1 only */ 158 u32 dczb; /* SS1 only */ 159 u32 dcs; /* SS1 only */ 160 u32 dczs; /* SS1 only */ 161 u32 pickfb; /* SS1 only */ 162 u32 pickbb; /* SS1 only */ 163 u32 dcfc; /* SS1 only */ 164 u32 forcecol; /* SS1 only */ 165 u32 door[8]; /* SS1 only */ 166 u32 pick[5]; /* SS1 only */ 167 }; 168 169 #define LEO_SS1_MISC_ENABLE 0x00000001 170 #define LEO_SS1_MISC_STEREO 0x00000002 171 struct leo_ld_ss1 { 172 u8 xxx0[0xef4]; 173 u32 ss1_misc; 174 }; 175 176 struct leo_ld_gbl { 177 u8 unknown; 178 }; 179 180 struct leo_par { 181 spinlock_t lock; 182 struct leo_lx_krn __iomem *lx_krn; 183 struct leo_lc_ss0_usr __iomem *lc_ss0_usr; 184 struct leo_ld_ss0 __iomem *ld_ss0; 185 struct leo_ld_ss1 __iomem *ld_ss1; 186 struct leo_cursor __iomem *cursor; 187 u32 extent; 188 u32 clut_data[256]; 189 190 u32 flags; 191 #define LEO_FLAG_BLANKED 0x00000001 192 193 unsigned long which_io; 194 }; 195 196 static void leo_wait(struct leo_lx_krn __iomem *lx_krn) 197 { 198 int i; 199 200 for (i = 0; 201 (sbus_readl(&lx_krn->krn_csr) & LEO_KRN_CSR_PROGRESS) && 202 i < 300000; 203 i++) 204 udelay(1); /* Busy wait at most 0.3 sec */ 205 return; 206 } 207 208 static void leo_switch_from_graph(struct fb_info *info) 209 { 210 struct leo_par *par = (struct leo_par *) info->par; 211 struct leo_ld_ss0 __iomem *ss = par->ld_ss0; 212 struct leo_cursor __iomem *cursor = par->cursor; 213 unsigned long flags; 214 u32 val; 215 216 spin_lock_irqsave(&par->lock, flags); 217 218 par->extent = ((info->var.xres - 1) | 219 ((info->var.yres - 1) << 16)); 220 221 sbus_writel(0xffffffff, &ss->wid); 222 sbus_writel(0xffff, &ss->wmask); 223 sbus_writel(0, &ss->vclipmin); 224 sbus_writel(par->extent, &ss->vclipmax); 225 sbus_writel(0, &ss->fg); 226 sbus_writel(0xff000000, &ss->planemask); 227 sbus_writel(0x310850, &ss->rop); 228 sbus_writel(0, &ss->widclip); 229 sbus_writel((info->var.xres-1) | ((info->var.yres-1) << 11), 230 &par->lc_ss0_usr->extent); 231 sbus_writel(4, &par->lc_ss0_usr->addrspace); 232 sbus_writel(0x80000000, &par->lc_ss0_usr->fill); 233 sbus_writel(0, &par->lc_ss0_usr->fontt); 234 do { 235 val = sbus_readl(&par->lc_ss0_usr->csr); 236 } while (val & 0x20000000); 237 238 /* setup screen buffer for cfb_* functions */ 239 sbus_writel(1, &ss->wid); 240 sbus_writel(0x00ffffff, &ss->planemask); 241 sbus_writel(0x310b90, &ss->rop); 242 sbus_writel(0, &par->lc_ss0_usr->addrspace); 243 244 /* hide cursor */ 245 sbus_writel(sbus_readl(&cursor->cur_misc) & ~LEO_CUR_ENABLE, &cursor->cur_misc); 246 247 spin_unlock_irqrestore(&par->lock, flags); 248 } 249 250 static int leo_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) 251 { 252 /* We just use this to catch switches out of 253 * graphics mode. 254 */ 255 leo_switch_from_graph(info); 256 257 if (var->xoffset || var->yoffset || var->vmode) 258 return -EINVAL; 259 return 0; 260 } 261 262 /** 263 * leo_setcolreg - Optional function. Sets a color register. 264 * @regno: boolean, 0 copy local, 1 get_user() function 265 * @red: frame buffer colormap structure 266 * @green: The green value which can be up to 16 bits wide 267 * @blue: The blue value which can be up to 16 bits wide. 268 * @transp: If supported the alpha value which can be up to 16 bits wide. 269 * @info: frame buffer info structure 270 */ 271 static int leo_setcolreg(unsigned regno, 272 unsigned red, unsigned green, unsigned blue, 273 unsigned transp, struct fb_info *info) 274 { 275 struct leo_par *par = (struct leo_par *) info->par; 276 struct leo_lx_krn __iomem *lx_krn = par->lx_krn; 277 unsigned long flags; 278 u32 val; 279 int i; 280 281 if (regno >= 256) 282 return 1; 283 284 red >>= 8; 285 green >>= 8; 286 blue >>= 8; 287 288 par->clut_data[regno] = red | (green << 8) | (blue << 16); 289 290 spin_lock_irqsave(&par->lock, flags); 291 292 leo_wait(lx_krn); 293 294 sbus_writel(LEO_KRN_TYPE_CLUTDATA, &lx_krn->krn_type); 295 for (i = 0; i < 256; i++) 296 sbus_writel(par->clut_data[i], &lx_krn->krn_value); 297 sbus_writel(LEO_KRN_TYPE_CLUT0, &lx_krn->krn_type); 298 299 val = sbus_readl(&lx_krn->krn_csr); 300 val |= (LEO_KRN_CSR_UNK | LEO_KRN_CSR_UNK2); 301 sbus_writel(val, &lx_krn->krn_csr); 302 303 spin_unlock_irqrestore(&par->lock, flags); 304 305 return 0; 306 } 307 308 /** 309 * leo_blank - Optional function. Blanks the display. 310 * @blank_mode: the blank mode we want. 311 * @info: frame buffer structure that represents a single frame buffer 312 */ 313 static int leo_blank(int blank, struct fb_info *info) 314 { 315 struct leo_par *par = (struct leo_par *) info->par; 316 struct leo_lx_krn __iomem *lx_krn = par->lx_krn; 317 unsigned long flags; 318 u32 val; 319 320 spin_lock_irqsave(&par->lock, flags); 321 322 switch (blank) { 323 case FB_BLANK_UNBLANK: /* Unblanking */ 324 val = sbus_readl(&lx_krn->krn_csr); 325 val |= LEO_KRN_CSR_ENABLE; 326 sbus_writel(val, &lx_krn->krn_csr); 327 par->flags &= ~LEO_FLAG_BLANKED; 328 break; 329 330 case FB_BLANK_NORMAL: /* Normal blanking */ 331 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */ 332 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */ 333 case FB_BLANK_POWERDOWN: /* Poweroff */ 334 val = sbus_readl(&lx_krn->krn_csr); 335 val &= ~LEO_KRN_CSR_ENABLE; 336 sbus_writel(val, &lx_krn->krn_csr); 337 par->flags |= LEO_FLAG_BLANKED; 338 break; 339 } 340 341 spin_unlock_irqrestore(&par->lock, flags); 342 343 return 0; 344 } 345 346 static struct sbus_mmap_map leo_mmap_map[] = { 347 { 348 .voff = LEO_SS0_MAP, 349 .poff = LEO_OFF_SS0, 350 .size = 0x800000 351 }, 352 { 353 .voff = LEO_LC_SS0_USR_MAP, 354 .poff = LEO_OFF_LC_SS0_USR, 355 .size = 0x1000 356 }, 357 { 358 .voff = LEO_LD_SS0_MAP, 359 .poff = LEO_OFF_LD_SS0, 360 .size = 0x1000 361 }, 362 { 363 .voff = LEO_LX_CURSOR_MAP, 364 .poff = LEO_OFF_LX_CURSOR, 365 .size = 0x1000 366 }, 367 { 368 .voff = LEO_SS1_MAP, 369 .poff = LEO_OFF_SS1, 370 .size = 0x800000 371 }, 372 { 373 .voff = LEO_LC_SS1_USR_MAP, 374 .poff = LEO_OFF_LC_SS1_USR, 375 .size = 0x1000 376 }, 377 { 378 .voff = LEO_LD_SS1_MAP, 379 .poff = LEO_OFF_LD_SS1, 380 .size = 0x1000 381 }, 382 { 383 .voff = LEO_UNK_MAP, 384 .poff = LEO_OFF_UNK, 385 .size = 0x1000 386 }, 387 { 388 .voff = LEO_LX_KRN_MAP, 389 .poff = LEO_OFF_LX_KRN, 390 .size = 0x1000 391 }, 392 { 393 .voff = LEO_LC_SS0_KRN_MAP, 394 .poff = LEO_OFF_LC_SS0_KRN, 395 .size = 0x1000 396 }, 397 { 398 .voff = LEO_LC_SS1_KRN_MAP, 399 .poff = LEO_OFF_LC_SS1_KRN, 400 .size = 0x1000 401 }, 402 { 403 .voff = LEO_LD_GBL_MAP, 404 .poff = LEO_OFF_LD_GBL, 405 .size = 0x1000 406 }, 407 { 408 .voff = LEO_UNK2_MAP, 409 .poff = LEO_OFF_UNK2, 410 .size = 0x100000 411 }, 412 { .size = 0 } 413 }; 414 415 static int leo_mmap(struct fb_info *info, struct vm_area_struct *vma) 416 { 417 struct leo_par *par = (struct leo_par *)info->par; 418 419 return sbusfb_mmap_helper(leo_mmap_map, 420 info->fix.smem_start, info->fix.smem_len, 421 par->which_io, vma); 422 } 423 424 static int leo_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) 425 { 426 return sbusfb_ioctl_helper(cmd, arg, info, 427 FBTYPE_SUNLEO, 32, info->fix.smem_len); 428 } 429 430 /* 431 * Initialisation 432 */ 433 434 static void 435 leo_init_fix(struct fb_info *info, struct device_node *dp) 436 { 437 strlcpy(info->fix.id, dp->name, sizeof(info->fix.id)); 438 439 info->fix.type = FB_TYPE_PACKED_PIXELS; 440 info->fix.visual = FB_VISUAL_TRUECOLOR; 441 442 info->fix.line_length = 8192; 443 444 info->fix.accel = FB_ACCEL_SUN_LEO; 445 } 446 447 static void leo_wid_put(struct fb_info *info, struct fb_wid_list *wl) 448 { 449 struct leo_par *par = (struct leo_par *) info->par; 450 struct leo_lx_krn __iomem *lx_krn = par->lx_krn; 451 struct fb_wid_item *wi; 452 unsigned long flags; 453 u32 val; 454 int i, j; 455 456 spin_lock_irqsave(&par->lock, flags); 457 458 leo_wait(lx_krn); 459 460 for (i = 0, wi = wl->wl_list; i < wl->wl_count; i++, wi++) { 461 switch (wi->wi_type) { 462 case FB_WID_DBL_8: 463 j = (wi->wi_index & 0xf) + 0x40; 464 break; 465 466 case FB_WID_DBL_24: 467 j = wi->wi_index & 0x3f; 468 break; 469 470 default: 471 continue; 472 } 473 sbus_writel(0x5800 + j, &lx_krn->krn_type); 474 sbus_writel(wi->wi_values[0], &lx_krn->krn_value); 475 } 476 sbus_writel(LEO_KRN_TYPE_WID, &lx_krn->krn_type); 477 478 val = sbus_readl(&lx_krn->krn_csr); 479 val |= (LEO_KRN_CSR_UNK | LEO_KRN_CSR_UNK2); 480 sbus_writel(val, &lx_krn->krn_csr); 481 482 spin_unlock_irqrestore(&par->lock, flags); 483 } 484 485 static void leo_init_wids(struct fb_info *info) 486 { 487 struct fb_wid_item wi; 488 struct fb_wid_list wl; 489 490 wl.wl_count = 1; 491 wl.wl_list = &wi; 492 wi.wi_type = FB_WID_DBL_8; 493 wi.wi_index = 0; 494 wi.wi_values [0] = 0x2c0; 495 leo_wid_put(info, &wl); 496 wi.wi_index = 1; 497 wi.wi_values [0] = 0x30; 498 leo_wid_put(info, &wl); 499 wi.wi_index = 2; 500 wi.wi_values [0] = 0x20; 501 leo_wid_put(info, &wl); 502 wi.wi_type = FB_WID_DBL_24; 503 wi.wi_index = 1; 504 wi.wi_values [0] = 0x30; 505 leo_wid_put(info, &wl); 506 } 507 508 static void leo_init_hw(struct fb_info *info) 509 { 510 struct leo_par *par = (struct leo_par *) info->par; 511 u32 val; 512 513 val = sbus_readl(&par->ld_ss1->ss1_misc); 514 val |= LEO_SS1_MISC_ENABLE; 515 sbus_writel(val, &par->ld_ss1->ss1_misc); 516 517 leo_switch_from_graph(info); 518 } 519 520 static void leo_fixup_var_rgb(struct fb_var_screeninfo *var) 521 { 522 var->red.offset = 0; 523 var->red.length = 8; 524 var->green.offset = 8; 525 var->green.length = 8; 526 var->blue.offset = 16; 527 var->blue.length = 8; 528 var->transp.offset = 0; 529 var->transp.length = 0; 530 } 531 532 static void leo_unmap_regs(struct platform_device *op, struct fb_info *info, 533 struct leo_par *par) 534 { 535 if (par->lc_ss0_usr) 536 of_iounmap(&op->resource[0], par->lc_ss0_usr, 0x1000); 537 if (par->ld_ss0) 538 of_iounmap(&op->resource[0], par->ld_ss0, 0x1000); 539 if (par->ld_ss1) 540 of_iounmap(&op->resource[0], par->ld_ss1, 0x1000); 541 if (par->lx_krn) 542 of_iounmap(&op->resource[0], par->lx_krn, 0x1000); 543 if (par->cursor) 544 of_iounmap(&op->resource[0], 545 par->cursor, sizeof(struct leo_cursor)); 546 if (info->screen_base) 547 of_iounmap(&op->resource[0], info->screen_base, 0x800000); 548 } 549 550 static int leo_probe(struct platform_device *op) 551 { 552 struct device_node *dp = op->dev.of_node; 553 struct fb_info *info; 554 struct leo_par *par; 555 int linebytes, err; 556 557 info = framebuffer_alloc(sizeof(struct leo_par), &op->dev); 558 559 err = -ENOMEM; 560 if (!info) 561 goto out_err; 562 par = info->par; 563 564 spin_lock_init(&par->lock); 565 566 info->fix.smem_start = op->resource[0].start; 567 par->which_io = op->resource[0].flags & IORESOURCE_BITS; 568 569 sbusfb_fill_var(&info->var, dp, 32); 570 leo_fixup_var_rgb(&info->var); 571 572 linebytes = of_getintprop_default(dp, "linebytes", 573 info->var.xres); 574 info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres); 575 576 par->lc_ss0_usr = 577 of_ioremap(&op->resource[0], LEO_OFF_LC_SS0_USR, 578 0x1000, "leolc ss0usr"); 579 par->ld_ss0 = 580 of_ioremap(&op->resource[0], LEO_OFF_LD_SS0, 581 0x1000, "leold ss0"); 582 par->ld_ss1 = 583 of_ioremap(&op->resource[0], LEO_OFF_LD_SS1, 584 0x1000, "leold ss1"); 585 par->lx_krn = 586 of_ioremap(&op->resource[0], LEO_OFF_LX_KRN, 587 0x1000, "leolx krn"); 588 par->cursor = 589 of_ioremap(&op->resource[0], LEO_OFF_LX_CURSOR, 590 sizeof(struct leo_cursor), "leolx cursor"); 591 info->screen_base = 592 of_ioremap(&op->resource[0], LEO_OFF_SS0, 593 0x800000, "leo ram"); 594 if (!par->lc_ss0_usr || 595 !par->ld_ss0 || 596 !par->ld_ss1 || 597 !par->lx_krn || 598 !par->cursor || 599 !info->screen_base) 600 goto out_unmap_regs; 601 602 info->flags = FBINFO_DEFAULT; 603 info->fbops = &leo_ops; 604 info->pseudo_palette = par->clut_data; 605 606 leo_init_wids(info); 607 leo_init_hw(info); 608 609 leo_blank(FB_BLANK_UNBLANK, info); 610 611 if (fb_alloc_cmap(&info->cmap, 256, 0)) 612 goto out_unmap_regs; 613 614 leo_init_fix(info, dp); 615 616 err = register_framebuffer(info); 617 if (err < 0) 618 goto out_dealloc_cmap; 619 620 dev_set_drvdata(&op->dev, info); 621 622 printk(KERN_INFO "%pOF: leo at %lx:%lx\n", 623 dp, 624 par->which_io, info->fix.smem_start); 625 626 return 0; 627 628 out_dealloc_cmap: 629 fb_dealloc_cmap(&info->cmap); 630 631 out_unmap_regs: 632 leo_unmap_regs(op, info, par); 633 framebuffer_release(info); 634 635 out_err: 636 return err; 637 } 638 639 static int leo_remove(struct platform_device *op) 640 { 641 struct fb_info *info = dev_get_drvdata(&op->dev); 642 struct leo_par *par = info->par; 643 644 unregister_framebuffer(info); 645 fb_dealloc_cmap(&info->cmap); 646 647 leo_unmap_regs(op, info, par); 648 649 framebuffer_release(info); 650 651 return 0; 652 } 653 654 static const struct of_device_id leo_match[] = { 655 { 656 .name = "SUNW,leo", 657 }, 658 {}, 659 }; 660 MODULE_DEVICE_TABLE(of, leo_match); 661 662 static struct platform_driver leo_driver = { 663 .driver = { 664 .name = "leo", 665 .of_match_table = leo_match, 666 }, 667 .probe = leo_probe, 668 .remove = leo_remove, 669 }; 670 671 static int __init leo_init(void) 672 { 673 if (fb_get_options("leofb", NULL)) 674 return -ENODEV; 675 676 return platform_driver_register(&leo_driver); 677 } 678 679 static void __exit leo_exit(void) 680 { 681 platform_driver_unregister(&leo_driver); 682 } 683 684 module_init(leo_init); 685 module_exit(leo_exit); 686 687 MODULE_DESCRIPTION("framebuffer driver for LEO chipsets"); 688 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); 689 MODULE_VERSION("2.0"); 690 MODULE_LICENSE("GPL"); 691