1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * linux/drivers/video/sstfb.c -- voodoo graphics frame buffer 4 * 5 * Copyright (c) 2000-2002 Ghozlane Toumi <gtoumi@laposte.net> 6 * 7 * Created 15 Jan 2000 by Ghozlane Toumi 8 * 9 * Contributions (and many thanks) : 10 * 11 * 03/2001 James Simmons <jsimmons@infradead.org> 12 * 04/2001 Paul Mundt <lethal@chaoticdreams.org> 13 * 05/2001 Urs Ganse <ursg@uni.de> 14 * (initial work on voodoo2 port, interlace) 15 * 09/2002 Helge Deller <deller@gmx.de> 16 * (enable driver on big-endian machines (hppa), ioctl fixes) 17 * 12/2002 Helge Deller <deller@gmx.de> 18 * (port driver to new frambuffer infrastructure) 19 * 01/2003 Helge Deller <deller@gmx.de> 20 * (initial work on fb hardware acceleration for voodoo2) 21 * 08/2006 Alan Cox <alan@redhat.com> 22 * Remove never finished and bogus 24/32bit support 23 * Clean up macro abuse 24 * Minor tidying for format. 25 * 12/2006 Helge Deller <deller@gmx.de> 26 * add /sys/class/graphics/fbX/vgapass sysfs-interface 27 * add module option "mode_option" to set initial screen mode 28 * use fbdev default videomode database 29 * remove debug functions from ioctl 30 */ 31 32/* 33 * The voodoo1 has the following memory mapped address space: 34 * 0x000000 - 0x3fffff : registers (4MB) 35 * 0x400000 - 0x7fffff : linear frame buffer (4MB) 36 * 0x800000 - 0xffffff : texture memory (8MB) 37 */ 38 39/* 40 * misc notes, TODOs, toASKs, and deep thoughts 41 42-TODO: at one time or another test that the mode is acceptable by the monitor 43-ASK: Can I choose different ordering for the color bitfields (rgba argb ...) 44 which one should i use ? is there any preferred one ? It seems ARGB is 45 the one ... 46-TODO: in set_var check the validity of timings (hsync vsync)... 47-TODO: check and recheck the use of sst_wait_idle : we don't flush the fifo via 48 a nop command. so it's ok as long as the commands we pass don't go 49 through the fifo. warning: issuing a nop command seems to need pci_fifo 50-FIXME: in case of failure in the init sequence, be sure we return to a safe 51 state. 52- FIXME: Use accelerator for 2D scroll 53-FIXME: 4MB boards have banked memory (FbiInit2 bits 1 & 20) 54 */ 55 56/* 57 * debug info 58 * SST_DEBUG : enable debugging 59 * SST_DEBUG_REG : debug registers 60 * 0 : no debug 61 * 1 : dac calls, [un]set_bits, FbiInit 62 * 2 : insane debug level (log every register read/write) 63 * SST_DEBUG_FUNC : functions 64 * 0 : no debug 65 * 1 : function call / debug ioctl 66 * 2 : variables 67 * 3 : flood . you don't want to do that. trust me. 68 * SST_DEBUG_VAR : debug display/var structs 69 * 0 : no debug 70 * 1 : dumps display, fb_var 71 * 72 * sstfb specific ioctls: 73 * toggle vga (0x46db) : toggle vga_pass_through 74 */ 75 76#undef SST_DEBUG 77 78 79/* 80 * Includes 81 */ 82 83#include <linux/aperture.h> 84#include <linux/string.h> 85#include <linux/kernel.h> 86#include <linux/module.h> 87#include <linux/fb.h> 88#include <linux/pci.h> 89#include <linux/delay.h> 90#include <linux/init.h> 91#include <asm/io.h> 92#include <linux/uaccess.h> 93#include <video/sstfb.h> 94 95 96/* initialized by setup */ 97 98static bool vgapass; /* enable VGA passthrough cable */ 99static int mem; /* mem size in MB, 0 = autodetect */ 100static bool clipping = 1; /* use clipping (slower, safer) */ 101static int gfxclk; /* force FBI freq in Mhz . Dangerous */ 102static bool slowpci; /* slow PCI settings */ 103 104/* 105 Possible default video modes: 800x600@60, 640x480@75, 1024x768@76, 640x480@60 106*/ 107#define DEFAULT_VIDEO_MODE "640x480@60" 108 109static char *mode_option = DEFAULT_VIDEO_MODE; 110 111enum { 112 ID_VOODOO1 = 0, 113 ID_VOODOO2 = 1, 114}; 115 116#define IS_VOODOO2(par) ((par)->type == ID_VOODOO2) 117 118static struct sst_spec voodoo_spec[] = { 119 { .name = "Voodoo Graphics", .default_gfx_clock = 50000, .max_gfxclk = 60 }, 120 { .name = "Voodoo2", .default_gfx_clock = 75000, .max_gfxclk = 85 }, 121}; 122 123 124/* 125 * debug functions 126 */ 127 128#if (SST_DEBUG_REG > 0) 129static void sst_dbg_print_read_reg(u32 reg, u32 val) { 130 const char *regname; 131 switch (reg) { 132 case FBIINIT0: regname = "FbiInit0"; break; 133 case FBIINIT1: regname = "FbiInit1"; break; 134 case FBIINIT2: regname = "FbiInit2"; break; 135 case FBIINIT3: regname = "FbiInit3"; break; 136 case FBIINIT4: regname = "FbiInit4"; break; 137 case FBIINIT5: regname = "FbiInit5"; break; 138 case FBIINIT6: regname = "FbiInit6"; break; 139 default: regname = NULL; break; 140 } 141 if (regname == NULL) 142 r_ddprintk("sst_read(%#x): %#x\n", reg, val); 143 else 144 r_dprintk(" sst_read(%s): %#x\n", regname, val); 145} 146 147static void sst_dbg_print_write_reg(u32 reg, u32 val) { 148 const char *regname; 149 switch (reg) { 150 case FBIINIT0: regname = "FbiInit0"; break; 151 case FBIINIT1: regname = "FbiInit1"; break; 152 case FBIINIT2: regname = "FbiInit2"; break; 153 case FBIINIT3: regname = "FbiInit3"; break; 154 case FBIINIT4: regname = "FbiInit4"; break; 155 case FBIINIT5: regname = "FbiInit5"; break; 156 case FBIINIT6: regname = "FbiInit6"; break; 157 default: regname = NULL; break; 158 } 159 if (regname == NULL) 160 r_ddprintk("sst_write(%#x, %#x)\n", reg, val); 161 else 162 r_dprintk(" sst_write(%s, %#x)\n", regname, val); 163} 164#else /* (SST_DEBUG_REG > 0) */ 165# define sst_dbg_print_read_reg(reg, val) do {} while(0) 166# define sst_dbg_print_write_reg(reg, val) do {} while(0) 167#endif /* (SST_DEBUG_REG > 0) */ 168 169/* 170 * hardware access functions 171 */ 172 173/* register access */ 174#define sst_read(reg) __sst_read(par->mmio_vbase, reg) 175#define sst_write(reg,val) __sst_write(par->mmio_vbase, reg, val) 176#define sst_set_bits(reg,val) __sst_set_bits(par->mmio_vbase, reg, val) 177#define sst_unset_bits(reg,val) __sst_unset_bits(par->mmio_vbase, reg, val) 178#define sst_dac_read(reg) __sst_dac_read(par->mmio_vbase, reg) 179#define sst_dac_write(reg,val) __sst_dac_write(par->mmio_vbase, reg, val) 180#define dac_i_read(reg) __dac_i_read(par->mmio_vbase, reg) 181#define dac_i_write(reg,val) __dac_i_write(par->mmio_vbase, reg, val) 182 183static inline u32 __sst_read(u8 __iomem *vbase, u32 reg) 184{ 185 u32 ret = readl(vbase + reg); 186 sst_dbg_print_read_reg(reg, ret); 187 return ret; 188} 189 190static inline void __sst_write(u8 __iomem *vbase, u32 reg, u32 val) 191{ 192 sst_dbg_print_write_reg(reg, val); 193 writel(val, vbase + reg); 194} 195 196static inline void __sst_set_bits(u8 __iomem *vbase, u32 reg, u32 val) 197{ 198 r_dprintk("sst_set_bits(%#x, %#x)\n", reg, val); 199 __sst_write(vbase, reg, __sst_read(vbase, reg) | val); 200} 201 202static inline void __sst_unset_bits(u8 __iomem *vbase, u32 reg, u32 val) 203{ 204 r_dprintk("sst_unset_bits(%#x, %#x)\n", reg, val); 205 __sst_write(vbase, reg, __sst_read(vbase, reg) & ~val); 206} 207 208/* 209 * wait for the fbi chip. ASK: what happens if the fbi is stuck ? 210 * 211 * the FBI is supposed to be ready if we receive 5 time 212 * in a row a "idle" answer to our requests 213 */ 214 215#define sst_wait_idle() __sst_wait_idle(par->mmio_vbase) 216 217static int __sst_wait_idle(u8 __iomem *vbase) 218{ 219 int count = 0; 220 221 /* if (doFBINOP) __sst_write(vbase, NOPCMD, 0); */ 222 223 while(1) { 224 if (__sst_read(vbase, STATUS) & STATUS_FBI_BUSY) { 225 f_dddprintk("status: busy\n"); 226/* FIXME basically, this is a busy wait. maybe not that good. oh well; 227 * this is a small loop after all. 228 * Or maybe we should use mdelay() or udelay() here instead ? */ 229 count = 0; 230 } else { 231 count++; 232 f_dddprintk("status: idle(%d)\n", count); 233 } 234 if (count >= 5) return 1; 235/* XXX do something to avoid hanging the machine if the voodoo is out */ 236 } 237} 238 239 240/* dac access */ 241/* dac_read should be remaped to FbiInit2 (via the pci reg init_enable) */ 242static u8 __sst_dac_read(u8 __iomem *vbase, u8 reg) 243{ 244 u8 ret; 245 246 reg &= 0x07; 247 __sst_write(vbase, DAC_DATA, ((u32)reg << 8) | DAC_READ_CMD ); 248 __sst_wait_idle(vbase); 249 /* udelay(10); */ 250 ret = __sst_read(vbase, DAC_READ) & 0xff; 251 r_dprintk("sst_dac_read(%#x): %#x\n", reg, ret); 252 253 return ret; 254} 255 256static void __sst_dac_write(u8 __iomem *vbase, u8 reg, u8 val) 257{ 258 r_dprintk("sst_dac_write(%#x, %#x)\n", reg, val); 259 reg &= 0x07; 260 __sst_write(vbase, DAC_DATA,(((u32)reg << 8)) | (u32)val); 261 __sst_wait_idle(vbase); 262} 263 264/* indexed access to ti/att dacs */ 265static u32 __dac_i_read(u8 __iomem *vbase, u8 reg) 266{ 267 u32 ret; 268 269 __sst_dac_write(vbase, DACREG_ADDR_I, reg); 270 ret = __sst_dac_read(vbase, DACREG_DATA_I); 271 r_dprintk("sst_dac_read_i(%#x): %#x\n", reg, ret); 272 return ret; 273} 274static void __dac_i_write(u8 __iomem *vbase, u8 reg,u8 val) 275{ 276 r_dprintk("sst_dac_write_i(%#x, %#x)\n", reg, val); 277 __sst_dac_write(vbase, DACREG_ADDR_I, reg); 278 __sst_dac_write(vbase, DACREG_DATA_I, val); 279} 280 281/* compute the m,n,p , returns the real freq 282 * (ics datasheet : N <-> N1 , P <-> N2) 283 * 284 * Fout= Fref * (M+2)/( 2^P * (N+2)) 285 * we try to get close to the asked freq 286 * with P as high, and M as low as possible 287 * range: 288 * ti/att : 0 <= M <= 255; 0 <= P <= 3; 0<= N <= 63 289 * ics : 1 <= M <= 127; 0 <= P <= 3; 1<= N <= 31 290 * we'll use the lowest limitation, should be precise enouth 291 */ 292static int sst_calc_pll(const int freq, int *freq_out, struct pll_timing *t) 293{ 294 int m, m2, n, p, best_err, fout; 295 int best_n = -1; 296 int best_m = -1; 297 298 best_err = freq; 299 p = 3; 300 /* f * 2^P = vco should be less than VCOmax ~ 250 MHz for ics*/ 301 while (((1 << p) * freq > VCO_MAX) && (p >= 0)) 302 p--; 303 if (p == -1) 304 return -EINVAL; 305 for (n = 1; n < 32; n++) { 306 /* calc 2 * m so we can round it later*/ 307 m2 = (2 * freq * (1 << p) * (n + 2) ) / DAC_FREF - 4 ; 308 309 m = (m2 % 2 ) ? m2/2+1 : m2/2 ; 310 if (m >= 128) 311 break; 312 fout = (DAC_FREF * (m + 2)) / ((1 << p) * (n + 2)); 313 if ((abs(fout - freq) < best_err) && (m > 0)) { 314 best_n = n; 315 best_m = m; 316 best_err = abs(fout - freq); 317 /* we get the lowest m , allowing 0.5% error in freq*/ 318 if (200*best_err < freq) break; 319 } 320 } 321 if (best_n == -1) /* unlikely, but who knows ? */ 322 return -EINVAL; 323 t->p = p; 324 t->n = best_n; 325 t->m = best_m; 326 *freq_out = (DAC_FREF * (t->m + 2)) / ((1 << t->p) * (t->n + 2)); 327 f_ddprintk ("m: %d, n: %d, p: %d, F: %dKhz\n", 328 t->m, t->n, t->p, *freq_out); 329 return 0; 330} 331 332/* 333 * clear lfb screen 334 */ 335static void sstfb_clear_screen(struct fb_info *info) 336{ 337 /* clear screen */ 338 fb_memset_io(info->screen_base, 0, info->fix.smem_len); 339} 340 341 342/** 343 * sstfb_check_var - Optional function. Validates a var passed in. 344 * @var: frame buffer variable screen structure 345 * @info: frame buffer structure that represents a single frame buffer 346 * 347 * Limit to the abilities of a single chip as SLI is not supported 348 * by this driver. 349 */ 350 351static int sstfb_check_var(struct fb_var_screeninfo *var, 352 struct fb_info *info) 353{ 354 struct sstfb_par *par = info->par; 355 int hSyncOff = var->xres + var->right_margin + var->left_margin; 356 int vSyncOff = var->yres + var->lower_margin + var->upper_margin; 357 int vBackPorch = var->left_margin, yDim = var->yres; 358 int vSyncOn = var->vsync_len; 359 int tiles_in_X, real_length; 360 unsigned int freq; 361 362 if (sst_calc_pll(PICOS2KHZ(var->pixclock), &freq, &par->pll)) { 363 printk(KERN_ERR "sstfb: Pixclock at %ld KHZ out of range\n", 364 PICOS2KHZ(var->pixclock)); 365 return -EINVAL; 366 } 367 var->pixclock = KHZ2PICOS(freq); 368 369 if (var->vmode & FB_VMODE_INTERLACED) 370 vBackPorch += (vBackPorch % 2); 371 if (var->vmode & FB_VMODE_DOUBLE) { 372 vBackPorch <<= 1; 373 yDim <<=1; 374 vSyncOn <<=1; 375 vSyncOff <<=1; 376 } 377 378 switch (var->bits_per_pixel) { 379 case 0 ... 16 : 380 var->bits_per_pixel = 16; 381 break; 382 default : 383 printk(KERN_ERR "sstfb: Unsupported bpp %d\n", var->bits_per_pixel); 384 return -EINVAL; 385 } 386 387 /* validity tests */ 388 if (var->xres <= 1 || yDim <= 0 || var->hsync_len <= 1 || 389 hSyncOff <= 1 || var->left_margin <= 2 || vSyncOn <= 0 || 390 vSyncOff <= 0 || vBackPorch <= 0) { 391 return -EINVAL; 392 } 393 394 if (IS_VOODOO2(par)) { 395 /* Voodoo 2 limits */ 396 tiles_in_X = (var->xres + 63 ) / 64 * 2; 397 398 if (var->xres > POW2(11) || yDim >= POW2(11)) { 399 printk(KERN_ERR "sstfb: Unsupported resolution %dx%d\n", 400 var->xres, var->yres); 401 return -EINVAL; 402 } 403 404 if (var->hsync_len > POW2(9) || hSyncOff > POW2(11) || 405 var->left_margin - 2 >= POW2(9) || vSyncOn >= POW2(13) || 406 vSyncOff >= POW2(13) || vBackPorch >= POW2(9) || 407 tiles_in_X >= POW2(6) || tiles_in_X <= 0) { 408 printk(KERN_ERR "sstfb: Unsupported timings\n"); 409 return -EINVAL; 410 } 411 } else { 412 /* Voodoo limits */ 413 tiles_in_X = (var->xres + 63 ) / 64; 414 415 if (var->vmode) { 416 printk(KERN_ERR "sstfb: Interlace/doublescan not supported %#x\n", 417 var->vmode); 418 return -EINVAL; 419 } 420 if (var->xres > POW2(10) || var->yres >= POW2(10)) { 421 printk(KERN_ERR "sstfb: Unsupported resolution %dx%d\n", 422 var->xres, var->yres); 423 return -EINVAL; 424 } 425 if (var->hsync_len > POW2(8) || hSyncOff - 1 > POW2(10) || 426 var->left_margin - 2 >= POW2(8) || vSyncOn >= POW2(12) || 427 vSyncOff >= POW2(12) || vBackPorch >= POW2(8) || 428 tiles_in_X >= POW2(4) || tiles_in_X <= 0) { 429 printk(KERN_ERR "sstfb: Unsupported timings\n"); 430 return -EINVAL; 431 } 432 } 433 434 /* it seems that the fbi uses tiles of 64x16 pixels to "map" the mem */ 435 /* FIXME: i don't like this... looks wrong */ 436 real_length = tiles_in_X * (IS_VOODOO2(par) ? 32 : 64 ) 437 * ((var->bits_per_pixel == 16) ? 2 : 4); 438 439 if (real_length * yDim > info->fix.smem_len) { 440 printk(KERN_ERR "sstfb: Not enough video memory\n"); 441 return -ENOMEM; 442 } 443 444 var->sync &= (FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT); 445 var->vmode &= (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE); 446 var->xoffset = 0; 447 var->yoffset = 0; 448 var->height = -1; 449 var->width = -1; 450 451 /* 452 * correct the color bit fields 453 */ 454 /* var->{red|green|blue}.msb_right = 0; */ 455 456 switch (var->bits_per_pixel) { 457 case 16: /* RGB 565 LfbMode 0 */ 458 var->red.length = 5; 459 var->green.length = 6; 460 var->blue.length = 5; 461 var->transp.length = 0; 462 463 var->red.offset = 11; 464 var->green.offset = 5; 465 var->blue.offset = 0; 466 var->transp.offset = 0; 467 break; 468 default: 469 return -EINVAL; 470 } 471 return 0; 472} 473 474/** 475 * sstfb_set_par - Optional function. Alters the hardware state. 476 * @info: frame buffer structure that represents a single frame buffer 477 */ 478static int sstfb_set_par(struct fb_info *info) 479{ 480 struct sstfb_par *par = info->par; 481 u32 lfbmode, fbiinit1, fbiinit2, fbiinit3, fbiinit5, fbiinit6=0; 482 struct pci_dev *sst_dev = par->dev; 483 unsigned int freq; 484 int ntiles; 485 486 par->hSyncOff = info->var.xres + info->var.right_margin + info->var.left_margin; 487 488 par->yDim = info->var.yres; 489 par->vSyncOn = info->var.vsync_len; 490 par->vSyncOff = info->var.yres + info->var.lower_margin + info->var.upper_margin; 491 par->vBackPorch = info->var.upper_margin; 492 493 /* We need par->pll */ 494 sst_calc_pll(PICOS2KHZ(info->var.pixclock), &freq, &par->pll); 495 496 if (info->var.vmode & FB_VMODE_INTERLACED) 497 par->vBackPorch += (par->vBackPorch % 2); 498 if (info->var.vmode & FB_VMODE_DOUBLE) { 499 par->vBackPorch <<= 1; 500 par->yDim <<=1; 501 par->vSyncOn <<=1; 502 par->vSyncOff <<=1; 503 } 504 505 if (IS_VOODOO2(par)) { 506 /* voodoo2 has 32 pixel wide tiles , BUT strange things 507 happen with odd number of tiles */ 508 par->tiles_in_X = (info->var.xres + 63 ) / 64 * 2; 509 } else { 510 /* voodoo1 has 64 pixels wide tiles. */ 511 par->tiles_in_X = (info->var.xres + 63 ) / 64; 512 } 513 514 f_ddprintk("hsync_len hSyncOff vsync_len vSyncOff\n"); 515 f_ddprintk("%-7d %-8d %-7d %-8d\n", 516 info->var.hsync_len, par->hSyncOff, 517 par->vSyncOn, par->vSyncOff); 518 f_ddprintk("left_margin upper_margin xres yres Freq\n"); 519 f_ddprintk("%-10d %-10d %-4d %-4d %-8ld\n", 520 info->var.left_margin, info->var.upper_margin, 521 info->var.xres, info->var.yres, PICOS2KHZ(info->var.pixclock)); 522 523 sst_write(NOPCMD, 0); 524 sst_wait_idle(); 525 pci_write_config_dword(sst_dev, PCI_INIT_ENABLE, PCI_EN_INIT_WR); 526 sst_set_bits(FBIINIT1, VIDEO_RESET); 527 sst_set_bits(FBIINIT0, FBI_RESET | FIFO_RESET); 528 sst_unset_bits(FBIINIT2, EN_DRAM_REFRESH); 529 sst_wait_idle(); 530 531 /*sst_unset_bits (FBIINIT0, FBI_RESET); / reenable FBI ? */ 532 533 sst_write(BACKPORCH, par->vBackPorch << 16 | (info->var.left_margin - 2)); 534 sst_write(VIDEODIMENSIONS, par->yDim << 16 | (info->var.xres - 1)); 535 sst_write(HSYNC, (par->hSyncOff - 1) << 16 | (info->var.hsync_len - 1)); 536 sst_write(VSYNC, par->vSyncOff << 16 | par->vSyncOn); 537 538 fbiinit2 = sst_read(FBIINIT2); 539 fbiinit3 = sst_read(FBIINIT3); 540 541 /* everything is reset. we enable fbiinit2/3 remap : dac access ok */ 542 pci_write_config_dword(sst_dev, PCI_INIT_ENABLE, 543 PCI_EN_INIT_WR | PCI_REMAP_DAC ); 544 545 par->dac_sw.set_vidmod(info, info->var.bits_per_pixel); 546 547 /* set video clock */ 548 par->dac_sw.set_pll(info, &par->pll, VID_CLOCK); 549 550 /* disable fbiinit2/3 remap */ 551 pci_write_config_dword(sst_dev, PCI_INIT_ENABLE, 552 PCI_EN_INIT_WR); 553 554 /* restore fbiinit2/3 */ 555 sst_write(FBIINIT2,fbiinit2); 556 sst_write(FBIINIT3,fbiinit3); 557 558 fbiinit1 = (sst_read(FBIINIT1) & VIDEO_MASK) 559 | EN_DATA_OE 560 | EN_BLANK_OE 561 | EN_HVSYNC_OE 562 | EN_DCLK_OE 563 /* | (15 << TILES_IN_X_SHIFT) */ 564 | SEL_INPUT_VCLK_2X 565 /* | (2 << VCLK_2X_SEL_DEL_SHIFT) 566 | (2 << VCLK_DEL_SHIFT) */; 567/* try with vclk_in_delay =0 (bits 29:30) , vclk_out_delay =0 (bits(27:28) 568 in (near) future set them accordingly to revision + resolution (cf glide) 569 first understand what it stands for :) 570 FIXME: there are some artefacts... check for the vclk_in_delay 571 lets try with 6ns delay in both vclk_out & in... 572 doh... they're still there :\ 573*/ 574 575 ntiles = par->tiles_in_X; 576 if (IS_VOODOO2(par)) { 577 fbiinit1 |= ((ntiles & 0x20) >> 5) << TILES_IN_X_MSB_SHIFT 578 | ((ntiles & 0x1e) >> 1) << TILES_IN_X_SHIFT; 579/* as the only value of importance for us in fbiinit6 is tiles in X (lsb), 580 and as reading fbinit 6 will return crap (see FBIINIT6_DEFAULT) we just 581 write our value. BTW due to the dac unable to read odd number of tiles, this 582 field is always null ... */ 583 fbiinit6 = (ntiles & 0x1) << TILES_IN_X_LSB_SHIFT; 584 } 585 else 586 fbiinit1 |= ntiles << TILES_IN_X_SHIFT; 587 588 switch (info->var.bits_per_pixel) { 589 case 16: 590 fbiinit1 |= SEL_SOURCE_VCLK_2X_SEL; 591 break; 592 default: 593 return -EINVAL; 594 } 595 sst_write(FBIINIT1, fbiinit1); 596 if (IS_VOODOO2(par)) { 597 sst_write(FBIINIT6, fbiinit6); 598 fbiinit5=sst_read(FBIINIT5) & FBIINIT5_MASK ; 599 if (info->var.vmode & FB_VMODE_INTERLACED) 600 fbiinit5 |= INTERLACE; 601 if (info->var.vmode & FB_VMODE_DOUBLE) 602 fbiinit5 |= VDOUBLESCAN; 603 if (info->var.sync & FB_SYNC_HOR_HIGH_ACT) 604 fbiinit5 |= HSYNC_HIGH; 605 if (info->var.sync & FB_SYNC_VERT_HIGH_ACT) 606 fbiinit5 |= VSYNC_HIGH; 607 sst_write(FBIINIT5, fbiinit5); 608 } 609 sst_wait_idle(); 610 sst_unset_bits(FBIINIT1, VIDEO_RESET); 611 sst_unset_bits(FBIINIT0, FBI_RESET | FIFO_RESET); 612 sst_set_bits(FBIINIT2, EN_DRAM_REFRESH); 613 /* disables fbiinit writes */ 614 pci_write_config_dword(sst_dev, PCI_INIT_ENABLE, PCI_EN_FIFO_WR); 615 616 /* set lfbmode : set mode + front buffer for reads/writes 617 + disable pipeline */ 618 switch (info->var.bits_per_pixel) { 619 case 16: 620 lfbmode = LFB_565; 621 break; 622 default: 623 return -EINVAL; 624 } 625 626#if defined(__BIG_ENDIAN) 627 /* Enable byte-swizzle functionality in hardware. 628 * With this enabled, all our read- and write-accesses to 629 * the voodoo framebuffer can be done in native format, and 630 * the hardware will automatically convert it to little-endian. 631 * - tested on HP-PARISC, Helge Deller <deller@gmx.de> */ 632 lfbmode |= ( LFB_WORD_SWIZZLE_WR | LFB_BYTE_SWIZZLE_WR | 633 LFB_WORD_SWIZZLE_RD | LFB_BYTE_SWIZZLE_RD ); 634#endif 635 636 if (clipping) { 637 sst_write(LFBMODE, lfbmode | EN_PXL_PIPELINE); 638 /* 639 * Set "clipping" dimensions. If clipping is disabled and 640 * writes to offscreen areas of the framebuffer are performed, 641 * the "behaviour is undefined" (_very_ undefined) - Urs 642 */ 643 /* btw, it requires enabling pixel pipeline in LFBMODE . 644 off screen read/writes will just wrap and read/print pixels 645 on screen. Ugly but not that dangerous */ 646 f_ddprintk("setting clipping dimensions 0..%d, 0..%d\n", 647 info->var.xres - 1, par->yDim - 1); 648 649 sst_write(CLIP_LEFT_RIGHT, info->var.xres); 650 sst_write(CLIP_LOWY_HIGHY, par->yDim); 651 sst_set_bits(FBZMODE, EN_CLIPPING | EN_RGB_WRITE); 652 } else { 653 /* no clipping : direct access, no pipeline */ 654 sst_write(LFBMODE, lfbmode); 655 } 656 return 0; 657} 658 659/** 660 * sstfb_setcolreg - Optional function. Sets a color register. 661 * @regno: hardware colormap register 662 * @red: frame buffer colormap structure 663 * @green: The green value which can be up to 16 bits wide 664 * @blue: The blue value which can be up to 16 bits wide. 665 * @transp: If supported the alpha value which can be up to 16 bits wide. 666 * @info: frame buffer info structure 667 */ 668static int sstfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, 669 u_int transp, struct fb_info *info) 670{ 671 struct sstfb_par *par = info->par; 672 u32 col; 673 674 f_dddprintk("sstfb_setcolreg\n"); 675 f_dddprintk("%-2d rgbt: %#x, %#x, %#x, %#x\n", 676 regno, red, green, blue, transp); 677 if (regno > 15) 678 return 0; 679 680 red >>= (16 - info->var.red.length); 681 green >>= (16 - info->var.green.length); 682 blue >>= (16 - info->var.blue.length); 683 transp >>= (16 - info->var.transp.length); 684 col = (red << info->var.red.offset) 685 | (green << info->var.green.offset) 686 | (blue << info->var.blue.offset) 687 | (transp << info->var.transp.offset); 688 689 par->palette[regno] = col; 690 691 return 0; 692} 693 694static void sstfb_setvgapass( struct fb_info *info, int enable ) 695{ 696 struct sstfb_par *par = info->par; 697 struct pci_dev *sst_dev = par->dev; 698 u32 fbiinit0, tmp; 699 700 enable = enable ? 1:0; 701 if (par->vgapass == enable) 702 return; 703 par->vgapass = enable; 704 705 pci_read_config_dword(sst_dev, PCI_INIT_ENABLE, &tmp); 706 pci_write_config_dword(sst_dev, PCI_INIT_ENABLE, 707 tmp | PCI_EN_INIT_WR ); 708 fbiinit0 = sst_read (FBIINIT0); 709 if (par->vgapass) { 710 sst_write(FBIINIT0, fbiinit0 & ~DIS_VGA_PASSTHROUGH); 711 fb_info(info, "Enabling VGA pass-through\n"); 712 } else { 713 sst_write(FBIINIT0, fbiinit0 | DIS_VGA_PASSTHROUGH); 714 fb_info(info, "Disabling VGA pass-through\n"); 715 } 716 pci_write_config_dword(sst_dev, PCI_INIT_ENABLE, tmp); 717} 718 719static ssize_t store_vgapass(struct device *device, struct device_attribute *attr, 720 const char *buf, size_t count) 721{ 722 struct fb_info *info = dev_get_drvdata(device); 723 char ** last = NULL; 724 int val; 725 726 val = simple_strtoul(buf, last, 0); 727 sstfb_setvgapass(info, val); 728 729 return count; 730} 731 732static ssize_t show_vgapass(struct device *device, struct device_attribute *attr, 733 char *buf) 734{ 735 struct fb_info *info = dev_get_drvdata(device); 736 struct sstfb_par *par = info->par; 737 return sprintf(buf, "%d\n", par->vgapass); 738} 739 740static struct device_attribute device_attrs[] = { 741 __ATTR(vgapass, S_IRUGO|S_IWUSR, show_vgapass, store_vgapass) 742 }; 743 744static int sstfb_ioctl(struct fb_info *info, unsigned int cmd, 745 unsigned long arg) 746{ 747 struct sstfb_par *par; 748 u32 val; 749 750 switch (cmd) { 751 /* set/get VGA pass_through mode */ 752 case SSTFB_SET_VGAPASS: 753 if (copy_from_user(&val, (void __user *)arg, sizeof(val))) 754 return -EFAULT; 755 sstfb_setvgapass(info, val); 756 return 0; 757 case SSTFB_GET_VGAPASS: 758 par = info->par; 759 val = par->vgapass; 760 if (copy_to_user((void __user *)arg, &val, sizeof(val))) 761 return -EFAULT; 762 return 0; 763 } 764 765 return -EINVAL; 766} 767 768 769/* 770 * Screen-to-Screen BitBlt 2D command (for the bmove fb op.) - Voodoo2 only 771 */ 772#if 0 773static void sstfb_copyarea(struct fb_info *info, const struct fb_copyarea *area) 774{ 775 struct sstfb_par *par = info->par; 776 u32 stride = info->fix.line_length; 777 778 if (!IS_VOODOO2(par)) 779 return; 780 781 sst_write(BLTSRCBASEADDR, 0); 782 sst_write(BLTDSTBASEADDR, 0); 783 sst_write(BLTROP, BLTROP_COPY); 784 sst_write(BLTXYSTRIDES, stride | (stride << 16)); 785 sst_write(BLTSRCXY, area->sx | (area->sy << 16)); 786 sst_write(BLTDSTXY, area->dx | (area->dy << 16)); 787 sst_write(BLTSIZE, area->width | (area->height << 16)); 788 sst_write(BLTCOMMAND, BLT_SCR2SCR_BITBLT | LAUNCH_BITBLT | 789 (BLT_16BPP_FMT << 3) /* | BIT(14) */ | BIT(15) ); 790 sst_wait_idle(); 791} 792#endif 793 794 795/* 796 * FillRect 2D command (solidfill or invert (via ROP_XOR)) - Voodoo2 only 797 */ 798#if 0 799static void sstfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) 800{ 801 struct sstfb_par *par = info->par; 802 u32 stride = info->fix.line_length; 803 804 if (!IS_VOODOO2(par)) 805 return; 806 807 sst_write(BLTCLIPX, info->var.xres); 808 sst_write(BLTCLIPY, info->var.yres); 809 810 sst_write(BLTDSTBASEADDR, 0); 811 sst_write(BLTCOLOR, rect->color); 812 sst_write(BLTROP, rect->rop == ROP_COPY ? BLTROP_COPY : BLTROP_XOR); 813 sst_write(BLTXYSTRIDES, stride | (stride << 16)); 814 sst_write(BLTDSTXY, rect->dx | (rect->dy << 16)); 815 sst_write(BLTSIZE, rect->width | (rect->height << 16)); 816 sst_write(BLTCOMMAND, BLT_RECFILL_BITBLT | LAUNCH_BITBLT 817 | (BLT_16BPP_FMT << 3) /* | BIT(14) */ | BIT(15) | BIT(16) ); 818 sst_wait_idle(); 819} 820#endif 821 822 823 824/* 825 * get lfb size 826 */ 827static int sst_get_memsize(struct fb_info *info, __u32 *memsize) 828{ 829 u8 __iomem *fbbase_virt = info->screen_base; 830 831 /* force memsize */ 832 if (mem >= 1 && mem <= 4) { 833 *memsize = (mem * 0x100000); 834 printk(KERN_INFO "supplied memsize: %#x\n", *memsize); 835 return 1; 836 } 837 838 writel(0xdeadbeef, fbbase_virt); 839 writel(0xdeadbeef, fbbase_virt+0x100000); 840 writel(0xdeadbeef, fbbase_virt+0x200000); 841 f_ddprintk("0MB: %#x, 1MB: %#x, 2MB: %#x\n", 842 readl(fbbase_virt), readl(fbbase_virt + 0x100000), 843 readl(fbbase_virt + 0x200000)); 844 845 writel(0xabcdef01, fbbase_virt); 846 847 f_ddprintk("0MB: %#x, 1MB: %#x, 2MB: %#x\n", 848 readl(fbbase_virt), readl(fbbase_virt + 0x100000), 849 readl(fbbase_virt + 0x200000)); 850 851 /* checks for 4mb lfb, then 2, then defaults to 1 */ 852 if (readl(fbbase_virt + 0x200000) == 0xdeadbeef) 853 *memsize = 0x400000; 854 else if (readl(fbbase_virt + 0x100000) == 0xdeadbeef) 855 *memsize = 0x200000; 856 else 857 *memsize = 0x100000; 858 f_ddprintk("detected memsize: %dMB\n", *memsize >> 20); 859 return 1; 860} 861 862 863/* 864 * DAC detection routines 865 */ 866 867/* fbi should be idle, and fifo emty and mem disabled */ 868/* supposed to detect AT&T ATT20C409 and Ti TVP3409 ramdacs */ 869 870static int sst_detect_att(struct fb_info *info) 871{ 872 struct sstfb_par *par = info->par; 873 int i, mir, dir; 874 875 for (i = 0; i < 3; i++) { 876 sst_dac_write(DACREG_WMA, 0); /* backdoor */ 877 sst_dac_read(DACREG_RMR); /* read 4 times RMR */ 878 sst_dac_read(DACREG_RMR); 879 sst_dac_read(DACREG_RMR); 880 sst_dac_read(DACREG_RMR); 881 /* the fifth time, CR0 is read */ 882 sst_dac_read(DACREG_RMR); 883 /* the 6th, manufacturer id register */ 884 mir = sst_dac_read(DACREG_RMR); 885 /*the 7th, device ID register */ 886 dir = sst_dac_read(DACREG_RMR); 887 f_ddprintk("mir: %#x, dir: %#x\n", mir, dir); 888 if (mir == DACREG_MIR_ATT && dir == DACREG_DIR_ATT) { 889 return 1; 890 } 891 } 892 return 0; 893} 894 895static int sst_detect_ti(struct fb_info *info) 896{ 897 struct sstfb_par *par = info->par; 898 int i, mir, dir; 899 900 for (i = 0; i<3; i++) { 901 sst_dac_write(DACREG_WMA, 0); /* backdoor */ 902 sst_dac_read(DACREG_RMR); /* read 4 times RMR */ 903 sst_dac_read(DACREG_RMR); 904 sst_dac_read(DACREG_RMR); 905 sst_dac_read(DACREG_RMR); 906 /* the fifth time, CR0 is read */ 907 sst_dac_read(DACREG_RMR); 908 /* the 6th, manufacturer id register */ 909 mir = sst_dac_read(DACREG_RMR); 910 /*the 7th, device ID register */ 911 dir = sst_dac_read(DACREG_RMR); 912 f_ddprintk("mir: %#x, dir: %#x\n", mir, dir); 913 if ((mir == DACREG_MIR_TI ) && (dir == DACREG_DIR_TI)) { 914 return 1; 915 } 916 } 917 return 0; 918} 919 920/* 921 * try to detect ICS5342 ramdac 922 * we get the 1st byte (M value) of preset f1,f7 and fB 923 * why those 3 ? mmmh... for now, i'll do it the glide way... 924 * and ask questions later. anyway, it seems that all the freq registers are 925 * really at their default state (cf specs) so i ask again, why those 3 regs ? 926 * mmmmh.. it seems that's much more ugly than i thought. we use f0 and fA for 927 * pll programming, so in fact, we *hope* that the f1, f7 & fB won't be 928 * touched... 929 * is it really safe ? how can i reset this ramdac ? geee... 930 */ 931static int sst_detect_ics(struct fb_info *info) 932{ 933 struct sstfb_par *par = info->par; 934 int m_clk0_1, m_clk0_7, m_clk1_b; 935 int n_clk0_1, n_clk0_7, n_clk1_b; 936 int i; 937 938 for (i = 0; i<5; i++ ) { 939 sst_dac_write(DACREG_ICS_PLLRMA, 0x1); /* f1 */ 940 m_clk0_1 = sst_dac_read(DACREG_ICS_PLLDATA); 941 n_clk0_1 = sst_dac_read(DACREG_ICS_PLLDATA); 942 sst_dac_write(DACREG_ICS_PLLRMA, 0x7); /* f7 */ 943 m_clk0_7 = sst_dac_read(DACREG_ICS_PLLDATA); 944 n_clk0_7 = sst_dac_read(DACREG_ICS_PLLDATA); 945 sst_dac_write(DACREG_ICS_PLLRMA, 0xb); /* fB */ 946 m_clk1_b= sst_dac_read(DACREG_ICS_PLLDATA); 947 n_clk1_b= sst_dac_read(DACREG_ICS_PLLDATA); 948 f_ddprintk("m_clk0_1: %#x, m_clk0_7: %#x, m_clk1_b: %#x\n", 949 m_clk0_1, m_clk0_7, m_clk1_b); 950 f_ddprintk("n_clk0_1: %#x, n_clk0_7: %#x, n_clk1_b: %#x\n", 951 n_clk0_1, n_clk0_7, n_clk1_b); 952 if (( m_clk0_1 == DACREG_ICS_PLL_CLK0_1_INI) 953 && (m_clk0_7 == DACREG_ICS_PLL_CLK0_7_INI) 954 && (m_clk1_b == DACREG_ICS_PLL_CLK1_B_INI)) { 955 return 1; 956 } 957 } 958 return 0; 959} 960 961 962/* 963 * gfx, video, pci fifo should be reset, dram refresh disabled 964 * see detect_dac 965 */ 966 967static int sst_set_pll_att_ti(struct fb_info *info, 968 const struct pll_timing *t, const int clock) 969{ 970 struct sstfb_par *par = info->par; 971 u8 cr0, cc; 972 973 /* enable indexed mode */ 974 sst_dac_write(DACREG_WMA, 0); /* backdoor */ 975 sst_dac_read(DACREG_RMR); /* 1 time: RMR */ 976 sst_dac_read(DACREG_RMR); /* 2 RMR */ 977 sst_dac_read(DACREG_RMR); /* 3 // */ 978 sst_dac_read(DACREG_RMR); /* 4 // */ 979 cr0 = sst_dac_read(DACREG_RMR); /* 5 CR0 */ 980 981 sst_dac_write(DACREG_WMA, 0); 982 sst_dac_read(DACREG_RMR); 983 sst_dac_read(DACREG_RMR); 984 sst_dac_read(DACREG_RMR); 985 sst_dac_read(DACREG_RMR); 986 sst_dac_write(DACREG_RMR, (cr0 & 0xf0) 987 | DACREG_CR0_EN_INDEXED 988 | DACREG_CR0_8BIT 989 | DACREG_CR0_PWDOWN ); 990 /* so, now we are in indexed mode . dunno if its common, but 991 i find this way of doing things a little bit weird :p */ 992 993 udelay(300); 994 cc = dac_i_read(DACREG_CC_I); 995 switch (clock) { 996 case VID_CLOCK: 997 dac_i_write(DACREG_AC0_I, t->m); 998 dac_i_write(DACREG_AC1_I, t->p << 6 | t->n); 999 dac_i_write(DACREG_CC_I, 1000 (cc & 0x0f) | DACREG_CC_CLKA | DACREG_CC_CLKA_C); 1001 break; 1002 case GFX_CLOCK: 1003 dac_i_write(DACREG_BD0_I, t->m); 1004 dac_i_write(DACREG_BD1_I, t->p << 6 | t->n); 1005 dac_i_write(DACREG_CC_I, 1006 (cc & 0xf0) | DACREG_CC_CLKB | DACREG_CC_CLKB_D); 1007 break; 1008 default: 1009 dprintk("%s: wrong clock code '%d'\n", 1010 __func__, clock); 1011 return 0; 1012 } 1013 udelay(300); 1014 1015 /* power up the dac & return to "normal" non-indexed mode */ 1016 dac_i_write(DACREG_CR0_I, 1017 cr0 & ~DACREG_CR0_PWDOWN & ~DACREG_CR0_EN_INDEXED); 1018 return 1; 1019} 1020 1021static int sst_set_pll_ics(struct fb_info *info, 1022 const struct pll_timing *t, const int clock) 1023{ 1024 struct sstfb_par *par = info->par; 1025 u8 pll_ctrl; 1026 1027 sst_dac_write(DACREG_ICS_PLLRMA, DACREG_ICS_PLL_CTRL); 1028 pll_ctrl = sst_dac_read(DACREG_ICS_PLLDATA); 1029 switch(clock) { 1030 case VID_CLOCK: 1031 sst_dac_write(DACREG_ICS_PLLWMA, 0x0); /* CLK0, f0 */ 1032 sst_dac_write(DACREG_ICS_PLLDATA, t->m); 1033 sst_dac_write(DACREG_ICS_PLLDATA, t->p << 5 | t->n); 1034 /* selects freq f0 for clock 0 */ 1035 sst_dac_write(DACREG_ICS_PLLWMA, DACREG_ICS_PLL_CTRL); 1036 sst_dac_write(DACREG_ICS_PLLDATA, 1037 (pll_ctrl & 0xd8) 1038 | DACREG_ICS_CLK0 1039 | DACREG_ICS_CLK0_0); 1040 break; 1041 case GFX_CLOCK : 1042 sst_dac_write(DACREG_ICS_PLLWMA, 0xa); /* CLK1, fA */ 1043 sst_dac_write(DACREG_ICS_PLLDATA, t->m); 1044 sst_dac_write(DACREG_ICS_PLLDATA, t->p << 5 | t->n); 1045 /* selects freq fA for clock 1 */ 1046 sst_dac_write(DACREG_ICS_PLLWMA, DACREG_ICS_PLL_CTRL); 1047 sst_dac_write(DACREG_ICS_PLLDATA, 1048 (pll_ctrl & 0xef) | DACREG_ICS_CLK1_A); 1049 break; 1050 default: 1051 dprintk("%s: wrong clock code '%d'\n", 1052 __func__, clock); 1053 return 0; 1054 } 1055 udelay(300); 1056 return 1; 1057} 1058 1059static void sst_set_vidmod_att_ti(struct fb_info *info, const int bpp) 1060{ 1061 struct sstfb_par *par = info->par; 1062 u8 cr0; 1063 1064 sst_dac_write(DACREG_WMA, 0); /* backdoor */ 1065 sst_dac_read(DACREG_RMR); /* read 4 times RMR */ 1066 sst_dac_read(DACREG_RMR); 1067 sst_dac_read(DACREG_RMR); 1068 sst_dac_read(DACREG_RMR); 1069 /* the fifth time, CR0 is read */ 1070 cr0 = sst_dac_read(DACREG_RMR); 1071 1072 sst_dac_write(DACREG_WMA, 0); /* backdoor */ 1073 sst_dac_read(DACREG_RMR); /* read 4 times RMR */ 1074 sst_dac_read(DACREG_RMR); 1075 sst_dac_read(DACREG_RMR); 1076 sst_dac_read(DACREG_RMR); 1077 /* cr0 */ 1078 switch(bpp) { 1079 case 16: 1080 sst_dac_write(DACREG_RMR, (cr0 & 0x0f) | DACREG_CR0_16BPP); 1081 break; 1082 default: 1083 dprintk("%s: bad depth '%u'\n", __func__, bpp); 1084 break; 1085 } 1086} 1087 1088static void sst_set_vidmod_ics(struct fb_info *info, const int bpp) 1089{ 1090 struct sstfb_par *par = info->par; 1091 1092 switch(bpp) { 1093 case 16: 1094 sst_dac_write(DACREG_ICS_CMD, DACREG_ICS_CMD_16BPP); 1095 break; 1096 default: 1097 dprintk("%s: bad depth '%u'\n", __func__, bpp); 1098 break; 1099 } 1100} 1101 1102/* 1103 * detect dac type 1104 * prerequisite : write to FbiInitx enabled, video and fbi and pci fifo reset, 1105 * dram refresh disabled, FbiInit remaped. 1106 * TODO: mmh.. maybe i should put the "prerequisite" in the func ... 1107 */ 1108 1109 1110static struct dac_switch dacs[] = { 1111 { .name = "TI TVP3409", 1112 .detect = sst_detect_ti, 1113 .set_pll = sst_set_pll_att_ti, 1114 .set_vidmod = sst_set_vidmod_att_ti }, 1115 1116 { .name = "AT&T ATT20C409", 1117 .detect = sst_detect_att, 1118 .set_pll = sst_set_pll_att_ti, 1119 .set_vidmod = sst_set_vidmod_att_ti }, 1120 { .name = "ICS ICS5342", 1121 .detect = sst_detect_ics, 1122 .set_pll = sst_set_pll_ics, 1123 .set_vidmod = sst_set_vidmod_ics }, 1124}; 1125 1126static int sst_detect_dactype(struct fb_info *info, struct sstfb_par *par) 1127{ 1128 int i, ret = 0; 1129 1130 for (i = 0; i < ARRAY_SIZE(dacs); i++) { 1131 ret = dacs[i].detect(info); 1132 if (ret) 1133 break; 1134 } 1135 if (!ret) 1136 return 0; 1137 f_dprintk("%s found %s\n", __func__, dacs[i].name); 1138 par->dac_sw = dacs[i]; 1139 return 1; 1140} 1141 1142/* 1143 * Internal Routines 1144 */ 1145static int sst_init(struct fb_info *info, struct sstfb_par *par) 1146{ 1147 u32 fbiinit0, fbiinit1, fbiinit4; 1148 struct pci_dev *dev = par->dev; 1149 struct pll_timing gfx_timings; 1150 struct sst_spec *spec; 1151 int Fout; 1152 int gfx_clock; 1153 1154 spec = &voodoo_spec[par->type]; 1155 f_ddprintk(" fbiinit0 fbiinit1 fbiinit2 fbiinit3 fbiinit4 " 1156 " fbiinit6\n"); 1157 f_ddprintk("%0#10x %0#10x %0#10x %0#10x %0#10x %0#10x\n", 1158 sst_read(FBIINIT0), sst_read(FBIINIT1), sst_read(FBIINIT2), 1159 sst_read(FBIINIT3), sst_read(FBIINIT4), sst_read(FBIINIT6)); 1160 /* disable video clock */ 1161 pci_write_config_dword(dev, PCI_VCLK_DISABLE, 0); 1162 1163 /* enable writing to init registers, disable pci fifo */ 1164 pci_write_config_dword(dev, PCI_INIT_ENABLE, PCI_EN_INIT_WR); 1165 /* reset video */ 1166 sst_set_bits(FBIINIT1, VIDEO_RESET); 1167 sst_wait_idle(); 1168 /* reset gfx + pci fifo */ 1169 sst_set_bits(FBIINIT0, FBI_RESET | FIFO_RESET); 1170 sst_wait_idle(); 1171 1172 /* unreset fifo */ 1173 /*sst_unset_bits(FBIINIT0, FIFO_RESET); 1174 sst_wait_idle();*/ 1175 /* unreset FBI */ 1176 /*sst_unset_bits(FBIINIT0, FBI_RESET); 1177 sst_wait_idle();*/ 1178 1179 /* disable dram refresh */ 1180 sst_unset_bits(FBIINIT2, EN_DRAM_REFRESH); 1181 sst_wait_idle(); 1182 /* remap fbinit2/3 to dac */ 1183 pci_write_config_dword(dev, PCI_INIT_ENABLE, 1184 PCI_EN_INIT_WR | PCI_REMAP_DAC ); 1185 /* detect dac type */ 1186 if (!sst_detect_dactype(info, par)) { 1187 printk(KERN_ERR "sstfb: unknown dac type.\n"); 1188 //FIXME watch it: we are not in a safe state, bad bad bad. 1189 return 0; 1190 } 1191 1192 /* set graphic clock */ 1193 gfx_clock = spec->default_gfx_clock; 1194 if ((gfxclk >10 ) && (gfxclk < spec->max_gfxclk)) { 1195 printk(KERN_INFO "sstfb: Using supplied graphic freq : %dMHz\n", gfxclk); 1196 gfx_clock = gfxclk *1000; 1197 } else if (gfxclk) { 1198 printk(KERN_WARNING "sstfb: %dMhz is way out of spec! Using default\n", gfxclk); 1199 } 1200 1201 sst_calc_pll(gfx_clock, &Fout, &gfx_timings); 1202 par->dac_sw.set_pll(info, &gfx_timings, GFX_CLOCK); 1203 1204 /* disable fbiinit remap */ 1205 pci_write_config_dword(dev, PCI_INIT_ENABLE, 1206 PCI_EN_INIT_WR| PCI_EN_FIFO_WR ); 1207 /* defaults init registers */ 1208 /* FbiInit0: unreset gfx, unreset fifo */ 1209 fbiinit0 = FBIINIT0_DEFAULT; 1210 fbiinit1 = FBIINIT1_DEFAULT; 1211 fbiinit4 = FBIINIT4_DEFAULT; 1212 par->vgapass = vgapass; 1213 if (par->vgapass) 1214 fbiinit0 &= ~DIS_VGA_PASSTHROUGH; 1215 else 1216 fbiinit0 |= DIS_VGA_PASSTHROUGH; 1217 if (slowpci) { 1218 fbiinit1 |= SLOW_PCI_WRITES; 1219 fbiinit4 |= SLOW_PCI_READS; 1220 } else { 1221 fbiinit1 &= ~SLOW_PCI_WRITES; 1222 fbiinit4 &= ~SLOW_PCI_READS; 1223 } 1224 sst_write(FBIINIT0, fbiinit0); 1225 sst_wait_idle(); 1226 sst_write(FBIINIT1, fbiinit1); 1227 sst_wait_idle(); 1228 sst_write(FBIINIT2, FBIINIT2_DEFAULT); 1229 sst_wait_idle(); 1230 sst_write(FBIINIT3, FBIINIT3_DEFAULT); 1231 sst_wait_idle(); 1232 sst_write(FBIINIT4, fbiinit4); 1233 sst_wait_idle(); 1234 if (IS_VOODOO2(par)) { 1235 sst_write(FBIINIT6, FBIINIT6_DEFAULT); 1236 sst_wait_idle(); 1237 } 1238 1239 pci_write_config_dword(dev, PCI_INIT_ENABLE, PCI_EN_FIFO_WR); 1240 pci_write_config_dword(dev, PCI_VCLK_ENABLE, 0); 1241 return 1; 1242} 1243 1244static void sst_shutdown(struct fb_info *info) 1245{ 1246 struct sstfb_par *par = info->par; 1247 struct pci_dev *dev = par->dev; 1248 struct pll_timing gfx_timings; 1249 int Fout; 1250 1251 /* reset video, gfx, fifo, disable dram + remap fbiinit2/3 */ 1252 pci_write_config_dword(dev, PCI_INIT_ENABLE, PCI_EN_INIT_WR); 1253 sst_set_bits(FBIINIT1, VIDEO_RESET | EN_BLANKING); 1254 sst_unset_bits(FBIINIT2, EN_DRAM_REFRESH); 1255 sst_set_bits(FBIINIT0, FBI_RESET | FIFO_RESET); 1256 sst_wait_idle(); 1257 pci_write_config_dword(dev, PCI_INIT_ENABLE, 1258 PCI_EN_INIT_WR | PCI_REMAP_DAC); 1259 /* set 20Mhz gfx clock */ 1260 sst_calc_pll(20000, &Fout, &gfx_timings); 1261 par->dac_sw.set_pll(info, &gfx_timings, GFX_CLOCK); 1262 /* TODO maybe shutdown the dac, vrefresh and so on... */ 1263 pci_write_config_dword(dev, PCI_INIT_ENABLE, 1264 PCI_EN_INIT_WR); 1265 sst_unset_bits(FBIINIT0, FBI_RESET | FIFO_RESET | DIS_VGA_PASSTHROUGH); 1266 pci_write_config_dword(dev, PCI_VCLK_DISABLE,0); 1267 /* maybe keep fbiinit* and PCI_INIT_enable in the fb_info struct 1268 * from start ? */ 1269 pci_write_config_dword(dev, PCI_INIT_ENABLE, 0); 1270 1271} 1272 1273/* 1274 * Interface to the world 1275 */ 1276static int sstfb_setup(char *options) 1277{ 1278 char *this_opt; 1279 1280 if (!options || !*options) 1281 return 0; 1282 1283 while ((this_opt = strsep(&options, ",")) != NULL) { 1284 if (!*this_opt) continue; 1285 1286 f_ddprintk("option %s\n", this_opt); 1287 1288 if (!strcmp(this_opt, "vganopass")) 1289 vgapass = 0; 1290 else if (!strcmp(this_opt, "vgapass")) 1291 vgapass = 1; 1292 else if (!strcmp(this_opt, "clipping")) 1293 clipping = 1; 1294 else if (!strcmp(this_opt, "noclipping")) 1295 clipping = 0; 1296 else if (!strcmp(this_opt, "fastpci")) 1297 slowpci = 0; 1298 else if (!strcmp(this_opt, "slowpci")) 1299 slowpci = 1; 1300 else if (!strncmp(this_opt, "mem:",4)) 1301 mem = simple_strtoul (this_opt+4, NULL, 0); 1302 else if (!strncmp(this_opt, "gfxclk:",7)) 1303 gfxclk = simple_strtoul (this_opt+7, NULL, 0); 1304 else 1305 mode_option = this_opt; 1306 } 1307 return 0; 1308} 1309 1310 1311static const struct fb_ops sstfb_ops = { 1312 .owner = THIS_MODULE, 1313 FB_DEFAULT_IOMEM_OPS, 1314 .fb_check_var = sstfb_check_var, 1315 .fb_set_par = sstfb_set_par, 1316 .fb_setcolreg = sstfb_setcolreg, 1317 .fb_ioctl = sstfb_ioctl, 1318}; 1319 1320static int sstfb_probe(struct pci_dev *pdev, const struct pci_device_id *id) 1321{ 1322 struct fb_info *info; 1323 struct fb_fix_screeninfo *fix; 1324 struct sstfb_par *par; 1325 struct sst_spec *spec; 1326 int err; 1327 1328 err = aperture_remove_conflicting_pci_devices(pdev, "sstfb"); 1329 if (err) 1330 return err; 1331 1332 /* Enable device in PCI config. */ 1333 if ((err=pci_enable_device(pdev))) { 1334 printk(KERN_ERR "cannot enable device\n"); 1335 return err; 1336 } 1337 1338 /* Allocate the fb and par structures. */ 1339 info = framebuffer_alloc(sizeof(struct sstfb_par), &pdev->dev); 1340 if (!info) 1341 return -ENOMEM; 1342 1343 pci_set_drvdata(pdev, info); 1344 1345 par = info->par; 1346 fix = &info->fix; 1347 1348 par->type = id->driver_data; 1349 spec = &voodoo_spec[par->type]; 1350 f_ddprintk("found device : %s\n", spec->name); 1351 1352 par->dev = pdev; 1353 par->revision = pdev->revision; 1354 1355 fix->mmio_start = pci_resource_start(pdev,0); 1356 fix->mmio_len = 0x400000; 1357 fix->smem_start = fix->mmio_start + 0x400000; 1358 1359 if (!request_mem_region(fix->mmio_start, fix->mmio_len, "sstfb MMIO")) { 1360 printk(KERN_ERR "sstfb: cannot reserve mmio memory\n"); 1361 goto fail_mmio_mem; 1362 } 1363 1364 if (!request_mem_region(fix->smem_start, 0x400000,"sstfb FB")) { 1365 printk(KERN_ERR "sstfb: cannot reserve fb memory\n"); 1366 goto fail_fb_mem; 1367 } 1368 1369 par->mmio_vbase = ioremap(fix->mmio_start, 1370 fix->mmio_len); 1371 if (!par->mmio_vbase) { 1372 printk(KERN_ERR "sstfb: cannot remap register area %#lx\n", 1373 fix->mmio_start); 1374 goto fail_mmio_remap; 1375 } 1376 info->screen_base = ioremap(fix->smem_start, 0x400000); 1377 if (!info->screen_base) { 1378 printk(KERN_ERR "sstfb: cannot remap framebuffer %#lx\n", 1379 fix->smem_start); 1380 goto fail_fb_remap; 1381 } 1382 1383 if (!sst_init(info, par)) { 1384 printk(KERN_ERR "sstfb: Init failed\n"); 1385 goto fail; 1386 } 1387 sst_get_memsize(info, &fix->smem_len); 1388 strscpy(fix->id, spec->name, sizeof(fix->id)); 1389 1390 printk(KERN_INFO "%s (revision %d) with %s dac\n", 1391 fix->id, par->revision, par->dac_sw.name); 1392 printk(KERN_INFO "framebuffer at %#lx, mapped to 0x%p, size %dMB\n", 1393 fix->smem_start, info->screen_base, 1394 fix->smem_len >> 20); 1395 1396 f_ddprintk("regbase_virt: %p\n", par->mmio_vbase); 1397 f_ddprintk("membase_phys: %#lx\n", fix->smem_start); 1398 f_ddprintk("fbbase_virt: %p\n", info->screen_base); 1399 1400 info->fbops = &sstfb_ops; 1401 info->pseudo_palette = par->palette; 1402 1403 fix->type = FB_TYPE_PACKED_PIXELS; 1404 fix->visual = FB_VISUAL_TRUECOLOR; 1405 fix->accel = FB_ACCEL_NONE; /* FIXME */ 1406 /* 1407 * According to the specs, the linelength must be of 1024 *pixels* 1408 * and the 24bpp mode is in fact a 32 bpp mode (and both are in 1409 * fact dithered to 16bit). 1410 */ 1411 fix->line_length = 2048; /* default value, for 24 or 32bit: 4096 */ 1412 1413 fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 16); 1414 1415 if (sstfb_check_var(&info->var, info)) { 1416 printk(KERN_ERR "sstfb: invalid video mode.\n"); 1417 goto fail; 1418 } 1419 1420 if (sstfb_set_par(info)) { 1421 printk(KERN_ERR "sstfb: can't set default video mode.\n"); 1422 goto fail; 1423 } 1424 1425 if (fb_alloc_cmap(&info->cmap, 256, 0)) { 1426 printk(KERN_ERR "sstfb: can't alloc cmap memory.\n"); 1427 goto fail; 1428 } 1429 1430 /* register fb */ 1431 info->device = &pdev->dev; 1432 if (register_framebuffer(info) < 0) { 1433 printk(KERN_ERR "sstfb: can't register framebuffer.\n"); 1434 goto fail_register; 1435 } 1436 1437 sstfb_clear_screen(info); 1438 1439 if (device_create_file(info->dev, &device_attrs[0])) 1440 printk(KERN_WARNING "sstfb: can't create sysfs entry.\n"); 1441 1442 1443 fb_info(info, "%s frame buffer device at 0x%p\n", 1444 fix->id, info->screen_base); 1445 1446 return 0; 1447 1448fail_register: 1449 fb_dealloc_cmap(&info->cmap); 1450fail: 1451 iounmap(info->screen_base); 1452fail_fb_remap: 1453 iounmap(par->mmio_vbase); 1454fail_mmio_remap: 1455 release_mem_region(fix->smem_start, 0x400000); 1456fail_fb_mem: 1457 release_mem_region(fix->mmio_start, info->fix.mmio_len); 1458fail_mmio_mem: 1459 framebuffer_release(info); 1460 return -ENXIO; /* no voodoo detected */ 1461} 1462 1463static void sstfb_remove(struct pci_dev *pdev) 1464{ 1465 struct sstfb_par *par; 1466 struct fb_info *info; 1467 1468 info = pci_get_drvdata(pdev); 1469 par = info->par; 1470 1471 device_remove_file(info->dev, &device_attrs[0]); 1472 sst_shutdown(info); 1473 iounmap(info->screen_base); 1474 iounmap(par->mmio_vbase); 1475 release_mem_region(info->fix.smem_start, 0x400000); 1476 release_mem_region(info->fix.mmio_start, info->fix.mmio_len); 1477 fb_dealloc_cmap(&info->cmap); 1478 unregister_framebuffer(info); 1479 framebuffer_release(info); 1480} 1481 1482 1483static const struct pci_device_id sstfb_id_tbl[] = { 1484 { PCI_DEVICE(PCI_VENDOR_ID_3DFX, PCI_DEVICE_ID_3DFX_VOODOO ), 1485 .driver_data = ID_VOODOO1, }, 1486 { PCI_DEVICE(PCI_VENDOR_ID_3DFX, PCI_DEVICE_ID_3DFX_VOODOO2), 1487 .driver_data = ID_VOODOO2, }, 1488 { 0 }, 1489}; 1490 1491static struct pci_driver sstfb_driver = { 1492 .name = "sstfb", 1493 .id_table = sstfb_id_tbl, 1494 .probe = sstfb_probe, 1495 .remove = sstfb_remove, 1496}; 1497 1498 1499static int sstfb_init(void) 1500{ 1501 char *option = NULL; 1502 1503 if (fb_modesetting_disabled("sstfb")) 1504 return -ENODEV; 1505 1506 if (fb_get_options("sstfb", &option)) 1507 return -ENODEV; 1508 sstfb_setup(option); 1509 1510 return pci_register_driver(&sstfb_driver); 1511} 1512 1513static void sstfb_exit(void) 1514{ 1515 pci_unregister_driver(&sstfb_driver); 1516} 1517 1518 1519module_init(sstfb_init); 1520module_exit(sstfb_exit); 1521 1522MODULE_AUTHOR("(c) 2000,2002 Ghozlane Toumi <gtoumi@laposte.net>"); 1523MODULE_DESCRIPTION("FBDev driver for 3dfx Voodoo Graphics and Voodoo2 based video boards"); 1524MODULE_LICENSE("GPL"); 1525 1526module_param(mem, int, 0); 1527MODULE_PARM_DESC(mem, "Size of frame buffer memory in MB (1, 2, 4 MB, default=autodetect)"); 1528module_param(vgapass, bool, 0); 1529MODULE_PARM_DESC(vgapass, "Enable VGA PassThrough mode (0 or 1) (default=0)"); 1530module_param(clipping, bool, 0); 1531MODULE_PARM_DESC(clipping, "Enable clipping (slower, safer) (0 or 1) (default=1)"); 1532module_param(gfxclk, int, 0); 1533MODULE_PARM_DESC(gfxclk, "Force graphic chip frequency in MHz. DANGEROUS. (default=auto)"); 1534module_param(slowpci, bool, 0); 1535MODULE_PARM_DESC(slowpci, "Uses slow PCI settings (0 or 1) (default=0)"); 1536module_param(mode_option, charp, 0); 1537MODULE_PARM_DESC(mode_option, "Initial video mode (default=" DEFAULT_VIDEO_MODE ")"); 1538 1539