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Merge branch 'linus' into x86/cpu
[linux-2.6-block.git] / drivers / video / intelfb / intelfbhw.c
CommitLineData
1da177e4
LT		 1/*
2 * intelfb
3 *
4 * Linux framebuffer driver for Intel(R) 865G integrated graphics chips.
5 *
96de0e25 6 * Copyright © 2002, 2003 David Dawes <dawes@xfree86.org>
1da177e4
LT		 7 * 2004 Sylvain Meyer
8 *
9 * This driver consists of two parts. The first part (intelfbdrv.c) provides
10 * the basic fbdev interfaces, is derived in part from the radeonfb and
11 * vesafb drivers, and is covered by the GPL. The second part (intelfbhw.c)
12 * provides the code to program the hardware. Most of it is derived from
13 * the i810/i830 XFree86 driver. The HW-specific code is covered here
14 * under a dual license (GPL and MIT/XFree86 license).
15 *
16 * Author: David Dawes
17 *
18 */
19
20/* $DHD: intelfb/intelfbhw.c,v 1.9 2003/06/27 15:06:25 dawes Exp $ */
21
1da177e4
LT		 22#include <linux/module.h>
23#include <linux/kernel.h>
24#include <linux/errno.h>
25#include <linux/string.h>
26#include <linux/mm.h>
1da177e4
LT		 27#include <linux/slab.h>
28#include <linux/delay.h>
29#include <linux/fb.h>
1da177e4
LT		 30#include <linux/ioport.h>
31#include <linux/init.h>
32#include <linux/pci.h>
33#include <linux/vmalloc.h>
1da177e4 34#include <linux/pagemap.h>
7649757b 35#include <linux/interrupt.h>
1da177e4
LT		 36
37#include <asm/io.h>
38
39#include "intelfb.h"
40#include "intelfbhw.h"
41
7258b11d 42struct pll_min_max {
51d79747
DA		 43 int min_m, max_m, min_m1, max_m1;
44 int min_m2, max_m2, min_n, max_n;
45 int min_p, max_p, min_p1, max_p1;
46 int min_vco, max_vco, p_transition_clk, ref_clk;
16109b3f 47 int p_inc_lo, p_inc_hi;
7258b11d
DA		 48};
49
50#define PLLS_I8xx 0
51#define PLLS_I9xx 1
52#define PLLS_MAX 2
53
46f60b8e 54static struct pll_min_max plls[PLLS_MAX] = {
51d79747
DA		 55 { 108, 140, 18, 26,
56 6, 16, 3, 16,
57 4, 128, 0, 31,
58 930000, 1400000, 165000, 48000,
689c9568 59 4, 2 }, /* I8xx */
51d79747
DA		 60
61 { 75, 120, 10, 20,
62 5, 9, 4, 7,
63 5, 80, 1, 8,
64 1400000, 2800000, 200000, 96000,
689c9568 65 10, 5 } /* I9xx */
7258b11d
DA		 66};
67
689c9568 68int intelfbhw_get_chipset(struct pci_dev *pdev, struct intelfb_info *dinfo)
1da177e4
LT		 69{
70 u32 tmp;
d024960c 71 if (!pdev || !dinfo)
1da177e4
LT		 72 return 1;
73
74 switch (pdev->device) {
75 case PCI_DEVICE_ID_INTEL_830M:
d024960c
DA		 76 dinfo->name = "Intel(R) 830M";
77 dinfo->chipset = INTEL_830M;
78 dinfo->mobile = 1;
79 dinfo->pll_index = PLLS_I8xx;
1da177e4
LT		 80 return 0;
81 case PCI_DEVICE_ID_INTEL_845G:
d024960c
DA		 82 dinfo->name = "Intel(R) 845G";
83 dinfo->chipset = INTEL_845G;
84 dinfo->mobile = 0;
85 dinfo->pll_index = PLLS_I8xx;
1da177e4 86 return 0;
347486bb
SH		 87 case PCI_DEVICE_ID_INTEL_854:
88 dinfo->mobile = 1;
89 dinfo->name = "Intel(R) 854";
90 dinfo->chipset = INTEL_854;
91 return 0;
1da177e4
LT		 92 case PCI_DEVICE_ID_INTEL_85XGM:
93 tmp = 0;
d024960c
DA		 94 dinfo->mobile = 1;
95 dinfo->pll_index = PLLS_I8xx;
1da177e4
LT		 96 pci_read_config_dword(pdev, INTEL_85X_CAPID, &tmp);
97 switch ((tmp >> INTEL_85X_VARIANT_SHIFT) &
98 INTEL_85X_VARIANT_MASK) {
99 case INTEL_VAR_855GME:
d024960c
DA		 100 dinfo->name = "Intel(R) 855GME";
101 dinfo->chipset = INTEL_855GME;
1da177e4
LT		 102 return 0;
103 case INTEL_VAR_855GM:
d024960c
DA		 104 dinfo->name = "Intel(R) 855GM";
105 dinfo->chipset = INTEL_855GM;
1da177e4
LT		 106 return 0;
107 case INTEL_VAR_852GME:
d024960c
DA		 108 dinfo->name = "Intel(R) 852GME";
109 dinfo->chipset = INTEL_852GME;
1da177e4
LT		 110 return 0;
111 case INTEL_VAR_852GM:
d024960c
DA		 112 dinfo->name = "Intel(R) 852GM";
113 dinfo->chipset = INTEL_852GM;
1da177e4
LT		 114 return 0;
115 default:
d024960c
DA		 116 dinfo->name = "Intel(R) 852GM/855GM";
117 dinfo->chipset = INTEL_85XGM;
1da177e4
LT		 118 return 0;
119 }
120 break;
121 case PCI_DEVICE_ID_INTEL_865G:
d024960c
DA		 122 dinfo->name = "Intel(R) 865G";
123 dinfo->chipset = INTEL_865G;
124 dinfo->mobile = 0;
125 dinfo->pll_index = PLLS_I8xx;
1da177e4
LT		 126 return 0;
127 case PCI_DEVICE_ID_INTEL_915G:
d024960c
DA		 128 dinfo->name = "Intel(R) 915G";
129 dinfo->chipset = INTEL_915G;
130 dinfo->mobile = 0;
131 dinfo->pll_index = PLLS_I9xx;
1da177e4 132 return 0;
3a59026b 133 case PCI_DEVICE_ID_INTEL_915GM:
d024960c
DA		 134 dinfo->name = "Intel(R) 915GM";
135 dinfo->chipset = INTEL_915GM;
136 dinfo->mobile = 1;
137 dinfo->pll_index = PLLS_I9xx;
3a59026b 138 return 0;
9639d5ec
DA		 139 case PCI_DEVICE_ID_INTEL_945G:
140 dinfo->name = "Intel(R) 945G";
141 dinfo->chipset = INTEL_945G;
142 dinfo->mobile = 0;
143 dinfo->pll_index = PLLS_I9xx;
144 return 0;
9a90603f
DA		 145 case PCI_DEVICE_ID_INTEL_945GM:
146 dinfo->name = "Intel(R) 945GM";
147 dinfo->chipset = INTEL_945GM;
148 dinfo->mobile = 1;
149 dinfo->pll_index = PLLS_I9xx;
150 return 0;
3f7a26b4
PE		 151 case PCI_DEVICE_ID_INTEL_945GME:
152 dinfo->name = "Intel(R) 945GME";
153 dinfo->chipset = INTEL_945GME;
154 dinfo->mobile = 1;
155 dinfo->pll_index = PLLS_I9xx;
156 return 0;
0e170c72
MB		 157 case PCI_DEVICE_ID_INTEL_965G:
158 dinfo->name = "Intel(R) 965G";
159 dinfo->chipset = INTEL_965G;
160 dinfo->mobile = 0;
161 dinfo->pll_index = PLLS_I9xx;
162 return 0;
163 case PCI_DEVICE_ID_INTEL_965GM:
164 dinfo->name = "Intel(R) 965GM";
165 dinfo->chipset = INTEL_965GM;
166 dinfo->mobile = 1;
167 dinfo->pll_index = PLLS_I9xx;
168 return 0;
1da177e4
LT		 169 default:
170 return 1;
171 }
172}
173
689c9568
KH		 174int intelfbhw_get_memory(struct pci_dev *pdev, int *aperture_size,
175 int *stolen_size)
1da177e4
LT		 176{
177 struct pci_dev *bridge_dev;
178 u16 tmp;
1aecb393 179 int stolen_overhead;
1da177e4
LT		 180
181 if (!pdev || !aperture_size || !stolen_size)
182 return 1;
183
184 /* Find the bridge device. It is always 0:0.0 */
a77b8950 185 if (!(bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0)))) {
1da177e4
LT		 186 ERR_MSG("cannot find bridge device\n");
187 return 1;
188 }
189
190 /* Get the fb aperture size and "stolen" memory amount. */
191 tmp = 0;
192 pci_read_config_word(bridge_dev, INTEL_GMCH_CTRL, &tmp);
a77b8950
AC		 193 pci_dev_put(bridge_dev);
194
1da177e4 195 switch (pdev->device) {
1aecb393
EH		 196 case PCI_DEVICE_ID_INTEL_915G:
197 case PCI_DEVICE_ID_INTEL_915GM:
198 case PCI_DEVICE_ID_INTEL_945G:
199 case PCI_DEVICE_ID_INTEL_945GM:
3f7a26b4 200 case PCI_DEVICE_ID_INTEL_945GME:
0e170c72
MB		 201 case PCI_DEVICE_ID_INTEL_965G:
202 case PCI_DEVICE_ID_INTEL_965GM:
203 /* 915, 945 and 965 chipsets support a 256MB aperture.
1aecb393
EH		 204 Aperture size is determined by inspected the
205 base address of the aperture. */
206 if (pci_resource_start(pdev, 2) & 0x08000000)
207 *aperture_size = MB(128);
208 else
209 *aperture_size = MB(256);
210 break;
211 default:
1da177e4
LT		 212 if ((tmp & INTEL_GMCH_MEM_MASK) == INTEL_GMCH_MEM_64M)
213 *aperture_size = MB(64);
214 else
215 *aperture_size = MB(128);
1aecb393
EH		 216 break;
217 }
218
219 /* Stolen memory size is reduced by the GTT and the popup.
220 GTT is 1K per MB of aperture size, and popup is 4K. */
221 stolen_overhead = (*aperture_size / MB(1)) + 4;
222 switch(pdev->device) {
223 case PCI_DEVICE_ID_INTEL_830M:
224 case PCI_DEVICE_ID_INTEL_845G:
1da177e4
LT		 225 switch (tmp & INTEL_830_GMCH_GMS_MASK) {
226 case INTEL_830_GMCH_GMS_STOLEN_512:
1aecb393 227 *stolen_size = KB(512) - KB(stolen_overhead);
1da177e4
LT		 228 return 0;
229 case INTEL_830_GMCH_GMS_STOLEN_1024:
1aecb393 230 *stolen_size = MB(1) - KB(stolen_overhead);
1da177e4
LT		 231 return 0;
232 case INTEL_830_GMCH_GMS_STOLEN_8192:
1aecb393 233 *stolen_size = MB(8) - KB(stolen_overhead);
1da177e4
LT		 234 return 0;
235 case INTEL_830_GMCH_GMS_LOCAL:
236 ERR_MSG("only local memory found\n");
237 return 1;
238 case INTEL_830_GMCH_GMS_DISABLED:
239 ERR_MSG("video memory is disabled\n");
240 return 1;
241 default:
242 ERR_MSG("unexpected GMCH_GMS value: 0x%02x\n",
243 tmp & INTEL_830_GMCH_GMS_MASK);
244 return 1;
245 }
246 break;
247 default:
1da177e4
LT		 248 switch (tmp & INTEL_855_GMCH_GMS_MASK) {
249 case INTEL_855_GMCH_GMS_STOLEN_1M:
1aecb393 250 *stolen_size = MB(1) - KB(stolen_overhead);
1da177e4
LT		 251 return 0;
252 case INTEL_855_GMCH_GMS_STOLEN_4M:
1aecb393 253 *stolen_size = MB(4) - KB(stolen_overhead);
1da177e4
LT		 254 return 0;
255 case INTEL_855_GMCH_GMS_STOLEN_8M:
1aecb393 256 *stolen_size = MB(8) - KB(stolen_overhead);
1da177e4
LT		 257 return 0;
258 case INTEL_855_GMCH_GMS_STOLEN_16M:
1aecb393 259 *stolen_size = MB(16) - KB(stolen_overhead);
1da177e4
LT		 260 return 0;
261 case INTEL_855_GMCH_GMS_STOLEN_32M:
1aecb393 262 *stolen_size = MB(32) - KB(stolen_overhead);
1da177e4
LT		 263 return 0;
264 case INTEL_915G_GMCH_GMS_STOLEN_48M:
1aecb393 265 *stolen_size = MB(48) - KB(stolen_overhead);
1da177e4
LT		 266 return 0;
267 case INTEL_915G_GMCH_GMS_STOLEN_64M:
1aecb393 268 *stolen_size = MB(64) - KB(stolen_overhead);
1da177e4
LT		 269 return 0;
270 case INTEL_855_GMCH_GMS_DISABLED:
271 ERR_MSG("video memory is disabled\n");
272 return 0;
273 default:
274 ERR_MSG("unexpected GMCH_GMS value: 0x%02x\n",
275 tmp & INTEL_855_GMCH_GMS_MASK);
276 return 1;
277 }
278 }
279}
280
689c9568 281int intelfbhw_check_non_crt(struct intelfb_info *dinfo)
1da177e4
LT		 282{
283 int dvo = 0;
284
285 if (INREG(LVDS) & PORT_ENABLE)
286 dvo |= LVDS_PORT;
287 if (INREG(DVOA) & PORT_ENABLE)
288 dvo |= DVOA_PORT;
289 if (INREG(DVOB) & PORT_ENABLE)
290 dvo |= DVOB_PORT;
291 if (INREG(DVOC) & PORT_ENABLE)
292 dvo |= DVOC_PORT;
293
294 return dvo;
295}
296
689c9568 297const char * intelfbhw_dvo_to_string(int dvo)
1da177e4
LT		 298{
299 if (dvo & DVOA_PORT)
300 return "DVO port A";
301 else if (dvo & DVOB_PORT)
302 return "DVO port B";
303 else if (dvo & DVOC_PORT)
304 return "DVO port C";
305 else if (dvo & LVDS_PORT)
306 return "LVDS port";
307 else
308 return NULL;
309}
310
311
689c9568
KH		 312int intelfbhw_validate_mode(struct intelfb_info *dinfo,
313 struct fb_var_screeninfo *var)
1da177e4
LT		 314{
315 int bytes_per_pixel;
316 int tmp;
317
318#if VERBOSE > 0
319 DBG_MSG("intelfbhw_validate_mode\n");
320#endif
321
322 bytes_per_pixel = var->bits_per_pixel / 8;
323 if (bytes_per_pixel == 3)
324 bytes_per_pixel = 4;
325
326 /* Check if enough video memory. */
327 tmp = var->yres_virtual * var->xres_virtual * bytes_per_pixel;
328 if (tmp > dinfo->fb.size) {
329 WRN_MSG("Not enough video ram for mode "
330 "(%d KByte vs %d KByte).\n",
331 BtoKB(tmp), BtoKB(dinfo->fb.size));
332 return 1;
333 }
334
335 /* Check if x/y limits are OK. */
336 if (var->xres - 1 > HACTIVE_MASK) {
337 WRN_MSG("X resolution too large (%d vs %d).\n",
338 var->xres, HACTIVE_MASK + 1);
339 return 1;
340 }
341 if (var->yres - 1 > VACTIVE_MASK) {
342 WRN_MSG("Y resolution too large (%d vs %d).\n",
343 var->yres, VACTIVE_MASK + 1);
344 return 1;
345 }
28ebe4f6
KH		 346 if (var->xres < 4) {
347 WRN_MSG("X resolution too small (%d vs 4).\n", var->xres);
348 return 1;
349 }
350 if (var->yres < 4) {
351 WRN_MSG("Y resolution too small (%d vs 4).\n", var->yres);
352 return 1;
353 }
1da177e4 354
10b98368 355 /* Check for doublescan modes. */
1da177e4
LT		 356 if (var->vmode & FB_VMODE_DOUBLE) {
357 WRN_MSG("Mode is double-scan.\n");
358 return 1;
359 }
360
28ebe4f6
KH		 361 if ((var->vmode & FB_VMODE_INTERLACED) && (var->yres & 1)) {
362 WRN_MSG("Odd number of lines in interlaced mode\n");
363 return 1;
364 }
365
1da177e4
LT		 366 /* Check if clock is OK. */
367 tmp = 1000000000 / var->pixclock;
368 if (tmp < MIN_CLOCK) {
369 WRN_MSG("Pixel clock is too low (%d MHz vs %d MHz).\n",
370 (tmp + 500) / 1000, MIN_CLOCK / 1000);
371 return 1;
372 }
373 if (tmp > MAX_CLOCK) {
374 WRN_MSG("Pixel clock is too high (%d MHz vs %d MHz).\n",
375 (tmp + 500) / 1000, MAX_CLOCK / 1000);
376 return 1;
377 }
378
379 return 0;
380}
381
689c9568 382int intelfbhw_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
1da177e4
LT		 383{
384 struct intelfb_info *dinfo = GET_DINFO(info);
385 u32 offset, xoffset, yoffset;
386
387#if VERBOSE > 0
388 DBG_MSG("intelfbhw_pan_display\n");
389#endif
390
391 xoffset = ROUND_DOWN_TO(var->xoffset, 8);
392 yoffset = var->yoffset;
393
394 if ((xoffset + var->xres > var->xres_virtual) ||
395 (yoffset + var->yres > var->yres_virtual))
396 return -EINVAL;
397
398 offset = (yoffset * dinfo->pitch) +
399 (xoffset * var->bits_per_pixel) / 8;
400
401 offset += dinfo->fb.offset << 12;
402
f80d0d23 403 dinfo->vsync.pan_offset = offset;
689c9568 404 if ((var->activate & FB_ACTIVATE_VBL) &&
394d3af7 405 !intelfbhw_enable_irq(dinfo))
f80d0d23 406 dinfo->vsync.pan_display = 1;
689c9568 407 else {
f80d0d23
EH		 408 dinfo->vsync.pan_display = 0;
409 OUTREG(DSPABASE, offset);
410 }
1da177e4
LT		 411
412 return 0;
413}
414
415/* Blank the screen. */
689c9568 416void intelfbhw_do_blank(int blank, struct fb_info *info)
1da177e4
LT		 417{
418 struct intelfb_info *dinfo = GET_DINFO(info);
419 u32 tmp;
420
421#if VERBOSE > 0
422 DBG_MSG("intelfbhw_do_blank: blank is %d\n", blank);
423#endif
424
425 /* Turn plane A on or off */
426 tmp = INREG(DSPACNTR);
427 if (blank)
428 tmp &= ~DISPPLANE_PLANE_ENABLE;
429 else
430 tmp |= DISPPLANE_PLANE_ENABLE;
431 OUTREG(DSPACNTR, tmp);
432 /* Flush */
433 tmp = INREG(DSPABASE);
434 OUTREG(DSPABASE, tmp);
435
436 /* Turn off/on the HW cursor */
437#if VERBOSE > 0
438 DBG_MSG("cursor_on is %d\n", dinfo->cursor_on);
439#endif
440 if (dinfo->cursor_on) {
689c9568 441 if (blank)
1da177e4 442 intelfbhw_cursor_hide(dinfo);
689c9568 443 else
1da177e4 444 intelfbhw_cursor_show(dinfo);
1da177e4
LT		 445 dinfo->cursor_on = 1;
446 }
447 dinfo->cursor_blanked = blank;
448
449 /* Set DPMS level */
450 tmp = INREG(ADPA) & ~ADPA_DPMS_CONTROL_MASK;
451 switch (blank) {
452 case FB_BLANK_UNBLANK:
453 case FB_BLANK_NORMAL:
454 tmp |= ADPA_DPMS_D0;
455 break;
456 case FB_BLANK_VSYNC_SUSPEND:
457 tmp |= ADPA_DPMS_D1;
458 break;
459 case FB_BLANK_HSYNC_SUSPEND:
460 tmp |= ADPA_DPMS_D2;
461 break;
462 case FB_BLANK_POWERDOWN:
463 tmp |= ADPA_DPMS_D3;
464 break;
465 }
466 OUTREG(ADPA, tmp);
467
468 return;
469}
470
471
689c9568
KH		 472void intelfbhw_setcolreg(struct intelfb_info *dinfo, unsigned regno,
473 unsigned red, unsigned green, unsigned blue,
474 unsigned transp)
1da177e4 475{
ee5618f4
KH		 476 u32 palette_reg = (dinfo->pipe == PIPE_A) ?
477 PALETTE_A : PALETTE_B;
478
1da177e4
LT		 479#if VERBOSE > 0
480 DBG_MSG("intelfbhw_setcolreg: %d: (%d, %d, %d)\n",
481 regno, red, green, blue);
482#endif
483
1da177e4
LT		 484 OUTREG(palette_reg + (regno << 2),
485 (red << PALETTE_8_RED_SHIFT) |
486 (green << PALETTE_8_GREEN_SHIFT) |
487 (blue << PALETTE_8_BLUE_SHIFT));
488}
489
490
689c9568
KH		 491int intelfbhw_read_hw_state(struct intelfb_info *dinfo,
492 struct intelfb_hwstate *hw, int flag)
1da177e4
LT		 493{
494 int i;
495
496#if VERBOSE > 0
497 DBG_MSG("intelfbhw_read_hw_state\n");
498#endif
499
500 if (!hw || !dinfo)
501 return -1;
502
503 /* Read in as much of the HW state as possible. */
504 hw->vga0_divisor = INREG(VGA0_DIVISOR);
505 hw->vga1_divisor = INREG(VGA1_DIVISOR);
506 hw->vga_pd = INREG(VGAPD);
507 hw->dpll_a = INREG(DPLL_A);
508 hw->dpll_b = INREG(DPLL_B);
509 hw->fpa0 = INREG(FPA0);
510 hw->fpa1 = INREG(FPA1);
511 hw->fpb0 = INREG(FPB0);
512 hw->fpb1 = INREG(FPB1);
513
514 if (flag == 1)
515 return flag;
516
517#if 0
518 /* This seems to be a problem with the 852GM/855GM */
519 for (i = 0; i < PALETTE_8_ENTRIES; i++) {
520 hw->palette_a[i] = INREG(PALETTE_A + (i << 2));
521 hw->palette_b[i] = INREG(PALETTE_B + (i << 2));
522 }
523#endif
524
525 if (flag == 2)
526 return flag;
527
528 hw->htotal_a = INREG(HTOTAL_A);
529 hw->hblank_a = INREG(HBLANK_A);
530 hw->hsync_a = INREG(HSYNC_A);
531 hw->vtotal_a = INREG(VTOTAL_A);
532 hw->vblank_a = INREG(VBLANK_A);
533 hw->vsync_a = INREG(VSYNC_A);
534 hw->src_size_a = INREG(SRC_SIZE_A);
535 hw->bclrpat_a = INREG(BCLRPAT_A);
536 hw->htotal_b = INREG(HTOTAL_B);
537 hw->hblank_b = INREG(HBLANK_B);
538 hw->hsync_b = INREG(HSYNC_B);
539 hw->vtotal_b = INREG(VTOTAL_B);
540 hw->vblank_b = INREG(VBLANK_B);
541 hw->vsync_b = INREG(VSYNC_B);
542 hw->src_size_b = INREG(SRC_SIZE_B);
543 hw->bclrpat_b = INREG(BCLRPAT_B);
544
545 if (flag == 3)
546 return flag;
547
548 hw->adpa = INREG(ADPA);
549 hw->dvoa = INREG(DVOA);
550 hw->dvob = INREG(DVOB);
551 hw->dvoc = INREG(DVOC);
552 hw->dvoa_srcdim = INREG(DVOA_SRCDIM);
553 hw->dvob_srcdim = INREG(DVOB_SRCDIM);
554 hw->dvoc_srcdim = INREG(DVOC_SRCDIM);
555 hw->lvds = INREG(LVDS);
556
557 if (flag == 4)
558 return flag;
559
560 hw->pipe_a_conf = INREG(PIPEACONF);
561 hw->pipe_b_conf = INREG(PIPEBCONF);
562 hw->disp_arb = INREG(DISPARB);
563
564 if (flag == 5)
565 return flag;
566
567 hw->cursor_a_control = INREG(CURSOR_A_CONTROL);
568 hw->cursor_b_control = INREG(CURSOR_B_CONTROL);
569 hw->cursor_a_base = INREG(CURSOR_A_BASEADDR);
570 hw->cursor_b_base = INREG(CURSOR_B_BASEADDR);
571
572 if (flag == 6)
573 return flag;
574
575 for (i = 0; i < 4; i++) {
576 hw->cursor_a_palette[i] = INREG(CURSOR_A_PALETTE0 + (i << 2));
577 hw->cursor_b_palette[i] = INREG(CURSOR_B_PALETTE0 + (i << 2));
578 }
579
580 if (flag == 7)
581 return flag;
582
583 hw->cursor_size = INREG(CURSOR_SIZE);
584
585 if (flag == 8)
586 return flag;
587
588 hw->disp_a_ctrl = INREG(DSPACNTR);
589 hw->disp_b_ctrl = INREG(DSPBCNTR);
590 hw->disp_a_base = INREG(DSPABASE);
591 hw->disp_b_base = INREG(DSPBBASE);
592 hw->disp_a_stride = INREG(DSPASTRIDE);
593 hw->disp_b_stride = INREG(DSPBSTRIDE);
594
595 if (flag == 9)
596 return flag;
597
598 hw->vgacntrl = INREG(VGACNTRL);
599
600 if (flag == 10)
601 return flag;
602
603 hw->add_id = INREG(ADD_ID);
604
605 if (flag == 11)
606 return flag;
607
608 for (i = 0; i < 7; i++) {
609 hw->swf0x[i] = INREG(SWF00 + (i << 2));
610 hw->swf1x[i] = INREG(SWF10 + (i << 2));
611 if (i < 3)
612 hw->swf3x[i] = INREG(SWF30 + (i << 2));
613 }
614
615 for (i = 0; i < 8; i++)
616 hw->fence[i] = INREG(FENCE + (i << 2));
617
618 hw->instpm = INREG(INSTPM);
619 hw->mem_mode = INREG(MEM_MODE);
620 hw->fw_blc_0 = INREG(FW_BLC_0);
621 hw->fw_blc_1 = INREG(FW_BLC_1);
622
9a5f019b
EH		 623 hw->hwstam = INREG16(HWSTAM);
624 hw->ier = INREG16(IER);
625 hw->iir = INREG16(IIR);
626 hw->imr = INREG16(IMR);
627
1da177e4
LT		 628 return 0;
629}
630
631
d024960c
DA		 632static int calc_vclock3(int index, int m, int n, int p)
633{
7679f4d6
DA		 634 if (p == 0 || n == 0)
635 return 0;
3aff13cf 636 return plls[index].ref_clk * m / n / p;
d024960c 637}
8b91b0b4 638
689c9568
KH		 639static int calc_vclock(int index, int m1, int m2, int n, int p1, int p2,
640 int lvds)
d024960c 641{
c9daa873
DA		 642 struct pll_min_max *pll = &plls[index];
643 u32 m, vco, p;
644
645 m = (5 * (m1 + 2)) + (m2 + 2);
646 n += 2;
647 vco = pll->ref_clk * m / n;
648
689c9568 649 if (index == PLLS_I8xx)
c9daa873 650 p = ((p1 + 2) * (1 << (p2 + 1)));
689c9568 651 else
c9daa873 652 p = ((p1) * (p2 ? 5 : 10));
c9daa873 653 return vco / p;
d024960c
DA		 654}
655
4dc3595f 656#if REGDUMP
689c9568
KH		 657static void intelfbhw_get_p1p2(struct intelfb_info *dinfo, int dpll,
658 int *o_p1, int *o_p2)
2abac1db
DA		 659{
660 int p1, p2;
661
662 if (IS_I9XX(dinfo)) {
663 if (dpll & DPLL_P1_FORCE_DIV2)
664 p1 = 1;
665 else
666 p1 = (dpll >> DPLL_P1_SHIFT) & 0xff;
689c9568 667
2abac1db
DA		 668 p1 = ffs(p1);
669
670 p2 = (dpll >> DPLL_I9XX_P2_SHIFT) & DPLL_P2_MASK;
671 } else {
672 if (dpll & DPLL_P1_FORCE_DIV2)
673 p1 = 0;
674 else
675 p1 = (dpll >> DPLL_P1_SHIFT) & DPLL_P1_MASK;
676 p2 = (dpll >> DPLL_P2_SHIFT) & DPLL_P2_MASK;
677 }
678
679 *o_p1 = p1;
680 *o_p2 = p2;
681}
4dc3595f 682#endif
2abac1db
DA		 683
684
689c9568
KH		 685void intelfbhw_print_hw_state(struct intelfb_info *dinfo,
686 struct intelfb_hwstate *hw)
1da177e4
LT		 687{
688#if REGDUMP
689 int i, m1, m2, n, p1, p2;
d024960c 690 int index = dinfo->pll_index;
1da177e4 691 DBG_MSG("intelfbhw_print_hw_state\n");
3aff13cf 692
f84fcb06 693 if (!hw)
1da177e4
LT		 694 return;
695 /* Read in as much of the HW state as possible. */
696 printk("hw state dump start\n");
697 printk(" VGA0_DIVISOR: 0x%08x\n", hw->vga0_divisor);
698 printk(" VGA1_DIVISOR: 0x%08x\n", hw->vga1_divisor);
689c9568 699 printk(" VGAPD: 0x%08x\n", hw->vga_pd);
1da177e4
LT		 700 n = (hw->vga0_divisor >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
701 m1 = (hw->vga0_divisor >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
702 m2 = (hw->vga0_divisor >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
3aff13cf 703
2abac1db 704 intelfbhw_get_p1p2(dinfo, hw->vga_pd, &p1, &p2);
3aff13cf 705
1da177e4 706 printk(" VGA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
d024960c 707 m1, m2, n, p1, p2);
8b91b0b4 708 printk(" VGA0: clock is %d\n",
3aff13cf
DA		 709 calc_vclock(index, m1, m2, n, p1, p2, 0));
710
1da177e4
LT		 711 n = (hw->vga1_divisor >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
712 m1 = (hw->vga1_divisor >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
713 m2 = (hw->vga1_divisor >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
2abac1db
DA		 714
715 intelfbhw_get_p1p2(dinfo, hw->vga_pd, &p1, &p2);
1da177e4 716 printk(" VGA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
d024960c 717 m1, m2, n, p1, p2);
689c9568
KH		 718 printk(" VGA1: clock is %d\n",
719 calc_vclock(index, m1, m2, n, p1, p2, 0));
3aff13cf 720
1da177e4
LT		 721 printk(" DPLL_A: 0x%08x\n", hw->dpll_a);
722 printk(" DPLL_B: 0x%08x\n", hw->dpll_b);
723 printk(" FPA0: 0x%08x\n", hw->fpa0);
724 printk(" FPA1: 0x%08x\n", hw->fpa1);
725 printk(" FPB0: 0x%08x\n", hw->fpb0);
726 printk(" FPB1: 0x%08x\n", hw->fpb1);
3aff13cf 727
1da177e4
LT		 728 n = (hw->fpa0 >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
729 m1 = (hw->fpa0 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
730 m2 = (hw->fpa0 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
3aff13cf 731
2abac1db 732 intelfbhw_get_p1p2(dinfo, hw->dpll_a, &p1, &p2);
3aff13cf 733
1da177e4 734 printk(" PLLA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
d024960c 735 m1, m2, n, p1, p2);
689c9568
KH		 736 printk(" PLLA0: clock is %d\n",
737 calc_vclock(index, m1, m2, n, p1, p2, 0));
3aff13cf 738
1da177e4
LT		 739 n = (hw->fpa1 >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
740 m1 = (hw->fpa1 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
741 m2 = (hw->fpa1 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
3aff13cf 742
2abac1db 743 intelfbhw_get_p1p2(dinfo, hw->dpll_a, &p1, &p2);
3aff13cf 744
1da177e4 745 printk(" PLLA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
d024960c 746 m1, m2, n, p1, p2);
689c9568
KH		 747 printk(" PLLA1: clock is %d\n",
748 calc_vclock(index, m1, m2, n, p1, p2, 0));
3aff13cf 749
1da177e4
LT		 750#if 0
751 printk(" PALETTE_A:\n");
752 for (i = 0; i < PALETTE_8_ENTRIES)
d024960c 753 printk(" %3d: 0x%08x\n", i, hw->palette_a[i]);
1da177e4
LT		 754 printk(" PALETTE_B:\n");
755 for (i = 0; i < PALETTE_8_ENTRIES)
d024960c 756 printk(" %3d: 0x%08x\n", i, hw->palette_b[i]);
1da177e4
LT		 757#endif
758
759 printk(" HTOTAL_A: 0x%08x\n", hw->htotal_a);
760 printk(" HBLANK_A: 0x%08x\n", hw->hblank_a);
761 printk(" HSYNC_A: 0x%08x\n", hw->hsync_a);
762 printk(" VTOTAL_A: 0x%08x\n", hw->vtotal_a);
763 printk(" VBLANK_A: 0x%08x\n", hw->vblank_a);
764 printk(" VSYNC_A: 0x%08x\n", hw->vsync_a);
765 printk(" SRC_SIZE_A: 0x%08x\n", hw->src_size_a);
766 printk(" BCLRPAT_A: 0x%08x\n", hw->bclrpat_a);
767 printk(" HTOTAL_B: 0x%08x\n", hw->htotal_b);
768 printk(" HBLANK_B: 0x%08x\n", hw->hblank_b);
769 printk(" HSYNC_B: 0x%08x\n", hw->hsync_b);
770 printk(" VTOTAL_B: 0x%08x\n", hw->vtotal_b);
771 printk(" VBLANK_B: 0x%08x\n", hw->vblank_b);
772 printk(" VSYNC_B: 0x%08x\n", hw->vsync_b);
773 printk(" SRC_SIZE_B: 0x%08x\n", hw->src_size_b);
774 printk(" BCLRPAT_B: 0x%08x\n", hw->bclrpat_b);
775
776 printk(" ADPA: 0x%08x\n", hw->adpa);
777 printk(" DVOA: 0x%08x\n", hw->dvoa);
778 printk(" DVOB: 0x%08x\n", hw->dvob);
779 printk(" DVOC: 0x%08x\n", hw->dvoc);
780 printk(" DVOA_SRCDIM: 0x%08x\n", hw->dvoa_srcdim);
781 printk(" DVOB_SRCDIM: 0x%08x\n", hw->dvob_srcdim);
782 printk(" DVOC_SRCDIM: 0x%08x\n", hw->dvoc_srcdim);
783 printk(" LVDS: 0x%08x\n", hw->lvds);
784
785 printk(" PIPEACONF: 0x%08x\n", hw->pipe_a_conf);
786 printk(" PIPEBCONF: 0x%08x\n", hw->pipe_b_conf);
787 printk(" DISPARB: 0x%08x\n", hw->disp_arb);
788
789 printk(" CURSOR_A_CONTROL: 0x%08x\n", hw->cursor_a_control);
790 printk(" CURSOR_B_CONTROL: 0x%08x\n", hw->cursor_b_control);
791 printk(" CURSOR_A_BASEADDR: 0x%08x\n", hw->cursor_a_base);
792 printk(" CURSOR_B_BASEADDR: 0x%08x\n", hw->cursor_b_base);
793
794 printk(" CURSOR_A_PALETTE: ");
795 for (i = 0; i < 4; i++) {
796 printk("0x%08x", hw->cursor_a_palette[i]);
797 if (i < 3)
798 printk(", ");
799 }
800 printk("\n");
801 printk(" CURSOR_B_PALETTE: ");
802 for (i = 0; i < 4; i++) {
803 printk("0x%08x", hw->cursor_b_palette[i]);
804 if (i < 3)
805 printk(", ");
806 }
807 printk("\n");
808
809 printk(" CURSOR_SIZE: 0x%08x\n", hw->cursor_size);
810
811 printk(" DSPACNTR: 0x%08x\n", hw->disp_a_ctrl);
812 printk(" DSPBCNTR: 0x%08x\n", hw->disp_b_ctrl);
813 printk(" DSPABASE: 0x%08x\n", hw->disp_a_base);
814 printk(" DSPBBASE: 0x%08x\n", hw->disp_b_base);
815 printk(" DSPASTRIDE: 0x%08x\n", hw->disp_a_stride);
816 printk(" DSPBSTRIDE: 0x%08x\n", hw->disp_b_stride);
817
818 printk(" VGACNTRL: 0x%08x\n", hw->vgacntrl);
819 printk(" ADD_ID: 0x%08x\n", hw->add_id);
820
821 for (i = 0; i < 7; i++) {
822 printk(" SWF0%d 0x%08x\n", i,
823 hw->swf0x[i]);
824 }
825 for (i = 0; i < 7; i++) {
826 printk(" SWF1%d 0x%08x\n", i,
827 hw->swf1x[i]);
828 }
829 for (i = 0; i < 3; i++) {
830 printk(" SWF3%d 0x%08x\n", i,
d024960c 831 hw->swf3x[i]);
1da177e4
LT		 832 }
833 for (i = 0; i < 8; i++)
834 printk(" FENCE%d 0x%08x\n", i,
d024960c 835 hw->fence[i]);
8b91b0b4 836
1da177e4
LT		 837 printk(" INSTPM 0x%08x\n", hw->instpm);
838 printk(" MEM_MODE 0x%08x\n", hw->mem_mode);
839 printk(" FW_BLC_0 0x%08x\n", hw->fw_blc_0);
840 printk(" FW_BLC_1 0x%08x\n", hw->fw_blc_1);
841
9a5f019b
EH		 842 printk(" HWSTAM 0x%04x\n", hw->hwstam);
843 printk(" IER 0x%04x\n", hw->ier);
844 printk(" IIR 0x%04x\n", hw->iir);
845 printk(" IMR 0x%04x\n", hw->imr);
1da177e4
LT		 846 printk("hw state dump end\n");
847#endif
848}
849
8b91b0b4 850
d024960c 851
1da177e4 852/* Split the M parameter into M1 and M2. */
689c9568
KH		 853static int splitm(int index, unsigned int m, unsigned int *retm1,
854 unsigned int *retm2)
1da177e4
LT		 855{
856 int m1, m2;
8492f081 857 int testm;
c9daa873
DA		 858 struct pll_min_max *pll = &plls[index];
859
8492f081 860 /* no point optimising too much - brute force m */
c9daa873
DA		 861 for (m1 = pll->min_m1; m1 < pll->max_m1 + 1; m1++) {
862 for (m2 = pll->min_m2; m2 < pll->max_m2 + 1; m2++) {
3aff13cf 863 testm = (5 * (m1 + 2)) + (m2 + 2);
8b91b0b4
DA		 864 if (testm == m) {
865 *retm1 = (unsigned int)m1;
866 *retm2 = (unsigned int)m2;
867 return 0;
868 }
869 }
1da177e4 870 }
8492f081 871 return 1;
1da177e4
LT		 872}
873
874/* Split the P parameter into P1 and P2. */
689c9568
KH		 875static int splitp(int index, unsigned int p, unsigned int *retp1,
876 unsigned int *retp2)
1da177e4
LT		 877{
878 int p1, p2;
c9daa873 879 struct pll_min_max *pll = &plls[index];
1da177e4 880
8b91b0b4 881 if (index == PLLS_I9xx) {
51d79747 882 p2 = (p % 10) ? 1 : 0;
3aff13cf
DA		 883
884 p1 = p / (p2 ? 5 : 10);
885
d024960c
DA		 886 *retp1 = (unsigned int)p1;
887 *retp2 = (unsigned int)p2;
888 return 0;
889 }
890
c9daa873
DA		 891 if (p % 4 == 0)
892 p2 = 1;
893 else
894 p2 = 0;
895 p1 = (p / (1 << (p2 + 1))) - 2;
896 if (p % 4 == 0 && p1 < pll->min_p1) {
897 p2 = 0;
1da177e4
LT		 898 p1 = (p / (1 << (p2 + 1))) - 2;
899 }
c9daa873
DA		 900 if (p1 < pll->min_p1 || p1 > pll->max_p1 ||
901 (p1 + 2) * (1 << (p2 + 1)) != p) {
902 return 1;
903 } else {
904 *retp1 = (unsigned int)p1;
905 *retp2 = (unsigned int)p2;
906 return 0;
907 }
1da177e4
LT		 908}
909
689c9568
KH		 910static int calc_pll_params(int index, int clock, u32 *retm1, u32 *retm2,
911 u32 *retn, u32 *retp1, u32 *retp2, u32 *retclock)
1da177e4 912{
7679f4d6
DA		 913 u32 m1, m2, n, p1, p2, n1, testm;
914 u32 f_vco, p, p_best = 0, m, f_out = 0;
1da177e4
LT		 915 u32 err_max, err_target, err_best = 10000000;
916 u32 n_best = 0, m_best = 0, f_best, f_err;
51d79747
DA		 917 u32 p_min, p_max, p_inc, div_max;
918 struct pll_min_max *pll = &plls[index];
1da177e4
LT		 919
920 /* Accept 0.5% difference, but aim for 0.1% */
921 err_max = 5 * clock / 1000;
922 err_target = clock / 1000;
923
924 DBG_MSG("Clock is %d\n", clock);
925
51d79747 926 div_max = pll->max_vco / clock;
1da177e4 927
51d79747
DA		 928 p_inc = (clock <= pll->p_transition_clk) ? pll->p_inc_lo : pll->p_inc_hi;
929 p_min = p_inc;
1da177e4 930 p_max = ROUND_DOWN_TO(div_max, p_inc);
51d79747
DA		 931 if (p_min < pll->min_p)
932 p_min = pll->min_p;
933 if (p_max > pll->max_p)
934 p_max = pll->max_p;
1da177e4
LT		 935
936 DBG_MSG("p range is %d-%d (%d)\n", p_min, p_max, p_inc);
937
938 p = p_min;
939 do {
7258b11d 940 if (splitp(index, p, &p1, &p2)) {
1da177e4
LT		 941 WRN_MSG("cannot split p = %d\n", p);
942 p += p_inc;
943 continue;
944 }
51d79747 945 n = pll->min_n;
1da177e4
LT		 946 f_vco = clock * p;
947
948 do {
51d79747
DA		 949 m = ROUND_UP_TO(f_vco * n, pll->ref_clk) / pll->ref_clk;
950 if (m < pll->min_m)
951 m = pll->min_m + 1;
952 if (m > pll->max_m)
953 m = pll->max_m - 1;
7679f4d6 954 for (testm = m - 1; testm <= m; testm++) {
9c54ea95 955 f_out = calc_vclock3(index, testm, n, p);
c9daa873 956 if (splitm(index, testm, &m1, &m2)) {
9c54ea95
KH		 957 WRN_MSG("cannot split m = %d\n",
958 testm);
7679f4d6
DA		 959 continue;
960 }
961 if (clock > f_out)
962 f_err = clock - f_out;
963 else/* slightly bias the error for bigger clocks */
964 f_err = f_out - clock + 1;
3aff13cf 965
7679f4d6 966 if (f_err < err_best) {
c9daa873 967 m_best = testm;
7679f4d6
DA		 968 n_best = n;
969 p_best = p;
970 f_best = f_out;
971 err_best = f_err;
972 }
1da177e4
LT		 973 }
974 n++;
51d79747 975 } while ((n <= pll->max_n) && (f_out >= clock));
1da177e4
LT		 976 p += p_inc;
977 } while ((p <= p_max));
978
979 if (!m_best) {
980 WRN_MSG("cannot find parameters for clock %d\n", clock);
981 return 1;
982 }
983 m = m_best;
984 n = n_best;
985 p = p_best;
7258b11d
DA		 986 splitm(index, m, &m1, &m2);
987 splitp(index, p, &p1, &p2);
1da177e4
LT		 988 n1 = n - 2;
989
990 DBG_MSG("m, n, p: %d (%d,%d), %d (%d), %d (%d,%d), "
991 "f: %d (%d), VCO: %d\n",
992 m, m1, m2, n, n1, p, p1, p2,
8b91b0b4 993 calc_vclock3(index, m, n, p),
3aff13cf 994 calc_vclock(index, m1, m2, n1, p1, p2, 0),
d024960c 995 calc_vclock3(index, m, n, p) * p);
1da177e4
LT		 996 *retm1 = m1;
997 *retm2 = m2;
998 *retn = n1;
999 *retp1 = p1;
1000 *retp2 = p2;
3aff13cf 1001 *retclock = calc_vclock(index, m1, m2, n1, p1, p2, 0);
1da177e4
LT		 1002
1003 return 0;
1004}
1005
689c9568
KH		 1006static __inline__ int check_overflow(u32 value, u32 limit,
1007 const char *description)
1da177e4
LT		 1008{
1009 if (value > limit) {
1010 WRN_MSG("%s value %d exceeds limit %d\n",
1011 description, value, limit);
1012 return 1;
1013 }
1014 return 0;
1015}
1016
1017/* It is assumed that hw is filled in with the initial state information. */
689c9568
KH		 1018int intelfbhw_mode_to_hw(struct intelfb_info *dinfo,
1019 struct intelfb_hwstate *hw,
1020 struct fb_var_screeninfo *var)
1da177e4
LT		 1021{
1022 int pipe = PIPE_A;
1023 u32 *dpll, *fp0, *fp1;
1024 u32 m1, m2, n, p1, p2, clock_target, clock;
1025 u32 hsync_start, hsync_end, hblank_start, hblank_end, htotal, hactive;
1026 u32 vsync_start, vsync_end, vblank_start, vblank_end, vtotal, vactive;
1027 u32 vsync_pol, hsync_pol;
1028 u32 *vs, *vb, *vt, *hs, *hb, *ht, *ss, *pipe_conf;
df7df8ab 1029 u32 stride_alignment;
1da177e4
LT		 1030
1031 DBG_MSG("intelfbhw_mode_to_hw\n");
1032
1033 /* Disable VGA */
1034 hw->vgacntrl |= VGA_DISABLE;
1035
1036 /* Check whether pipe A or pipe B is enabled. */
1037 if (hw->pipe_a_conf & PIPECONF_ENABLE)
1038 pipe = PIPE_A;
1039 else if (hw->pipe_b_conf & PIPECONF_ENABLE)
1040 pipe = PIPE_B;
1041
1042 /* Set which pipe's registers will be set. */
1043 if (pipe == PIPE_B) {
1044 dpll = &hw->dpll_b;
1045 fp0 = &hw->fpb0;
1046 fp1 = &hw->fpb1;
1047 hs = &hw->hsync_b;
1048 hb = &hw->hblank_b;
1049 ht = &hw->htotal_b;
1050 vs = &hw->vsync_b;
1051 vb = &hw->vblank_b;
1052 vt = &hw->vtotal_b;
1053 ss = &hw->src_size_b;
1054 pipe_conf = &hw->pipe_b_conf;
1055 } else {
1056 dpll = &hw->dpll_a;
1057 fp0 = &hw->fpa0;
1058 fp1 = &hw->fpa1;
1059 hs = &hw->hsync_a;
1060 hb = &hw->hblank_a;
1061 ht = &hw->htotal_a;
1062 vs = &hw->vsync_a;
1063 vb = &hw->vblank_a;
1064 vt = &hw->vtotal_a;
1065 ss = &hw->src_size_a;
1066 pipe_conf = &hw->pipe_a_conf;
1067 }
1068
1069 /* Use ADPA register for sync control. */
1070 hw->adpa &= ~ADPA_USE_VGA_HVPOLARITY;
1071
1072 /* sync polarity */
1073 hsync_pol = (var->sync & FB_SYNC_HOR_HIGH_ACT) ?
1074 ADPA_SYNC_ACTIVE_HIGH : ADPA_SYNC_ACTIVE_LOW;
1075 vsync_pol = (var->sync & FB_SYNC_VERT_HIGH_ACT) ?
1076 ADPA_SYNC_ACTIVE_HIGH : ADPA_SYNC_ACTIVE_LOW;
1077 hw->adpa &= ~((ADPA_SYNC_ACTIVE_MASK << ADPA_VSYNC_ACTIVE_SHIFT) |
1078 (ADPA_SYNC_ACTIVE_MASK << ADPA_HSYNC_ACTIVE_SHIFT));
1079 hw->adpa |= (hsync_pol << ADPA_HSYNC_ACTIVE_SHIFT) |
1080 (vsync_pol << ADPA_VSYNC_ACTIVE_SHIFT);
1081
1082 /* Connect correct pipe to the analog port DAC */
1083 hw->adpa &= ~(PIPE_MASK << ADPA_PIPE_SELECT_SHIFT);
1084 hw->adpa |= (pipe << ADPA_PIPE_SELECT_SHIFT);
1085
1086 /* Set DPMS state to D0 (on) */
1087 hw->adpa &= ~ADPA_DPMS_CONTROL_MASK;
1088 hw->adpa |= ADPA_DPMS_D0;
1089
1090 hw->adpa |= ADPA_DAC_ENABLE;
1091
1092 *dpll |= (DPLL_VCO_ENABLE | DPLL_VGA_MODE_DISABLE);
1093 *dpll &= ~(DPLL_RATE_SELECT_MASK | DPLL_REFERENCE_SELECT_MASK);
1094 *dpll |= (DPLL_REFERENCE_DEFAULT | DPLL_RATE_SELECT_FP0);
1095
1096 /* Desired clock in kHz */
1097 clock_target = 1000000000 / var->pixclock;
1098
3aff13cf 1099 if (calc_pll_params(dinfo->pll_index, clock_target, &m1, &m2,
8b91b0b4 1100 &n, &p1, &p2, &clock)) {
1da177e4
LT		 1101 WRN_MSG("calc_pll_params failed\n");
1102 return 1;
1103 }
1104
1105 /* Check for overflow. */
1106 if (check_overflow(p1, DPLL_P1_MASK, "PLL P1 parameter"))
1107 return 1;
1108 if (check_overflow(p2, DPLL_P2_MASK, "PLL P2 parameter"))
1109 return 1;
1110 if (check_overflow(m1, FP_DIVISOR_MASK, "PLL M1 parameter"))
1111 return 1;
1112 if (check_overflow(m2, FP_DIVISOR_MASK, "PLL M2 parameter"))
1113 return 1;
1114 if (check_overflow(n, FP_DIVISOR_MASK, "PLL N parameter"))
1115 return 1;
1116
1117 *dpll &= ~DPLL_P1_FORCE_DIV2;
1118 *dpll &= ~((DPLL_P2_MASK << DPLL_P2_SHIFT) |
1119 (DPLL_P1_MASK << DPLL_P1_SHIFT));
3aff13cf
DA		 1120
1121 if (IS_I9XX(dinfo)) {
1122 *dpll |= (p2 << DPLL_I9XX_P2_SHIFT);
1123 *dpll |= (1 << (p1 - 1)) << DPLL_P1_SHIFT;
689c9568 1124 } else
3aff13cf 1125 *dpll |= (p2 << DPLL_P2_SHIFT) | (p1 << DPLL_P1_SHIFT);
3aff13cf 1126
1da177e4
LT		 1127 *fp0 = (n << FP_N_DIVISOR_SHIFT) |
1128 (m1 << FP_M1_DIVISOR_SHIFT) |
1129 (m2 << FP_M2_DIVISOR_SHIFT);
1130 *fp1 = *fp0;
1131
1132 hw->dvob &= ~PORT_ENABLE;
1133 hw->dvoc &= ~PORT_ENABLE;
1134
1135 /* Use display plane A. */
1136 hw->disp_a_ctrl |= DISPPLANE_PLANE_ENABLE;
1137 hw->disp_a_ctrl &= ~DISPPLANE_GAMMA_ENABLE;
1138 hw->disp_a_ctrl &= ~DISPPLANE_PIXFORMAT_MASK;
1139 switch (intelfb_var_to_depth(var)) {
1140 case 8:
1141 hw->disp_a_ctrl |= DISPPLANE_8BPP | DISPPLANE_GAMMA_ENABLE;
1142 break;
1143 case 15:
1144 hw->disp_a_ctrl |= DISPPLANE_15_16BPP;
1145 break;
1146 case 16:
1147 hw->disp_a_ctrl |= DISPPLANE_16BPP;
1148 break;
1149 case 24:
1150 hw->disp_a_ctrl |= DISPPLANE_32BPP_NO_ALPHA;
1151 break;
1152 }
1153 hw->disp_a_ctrl &= ~(PIPE_MASK << DISPPLANE_SEL_PIPE_SHIFT);
1154 hw->disp_a_ctrl |= (pipe << DISPPLANE_SEL_PIPE_SHIFT);
1155
1156 /* Set CRTC registers. */
1157 hactive = var->xres;
1158 hsync_start = hactive + var->right_margin;
1159 hsync_end = hsync_start + var->hsync_len;
1160 htotal = hsync_end + var->left_margin;
1161 hblank_start = hactive;
1162 hblank_end = htotal;
1163
1164 DBG_MSG("H: act %d, ss %d, se %d, tot %d bs %d, be %d\n",
1165 hactive, hsync_start, hsync_end, htotal, hblank_start,
1166 hblank_end);
1167
1168 vactive = var->yres;
28ebe4f6
KH		 1169 if (var->vmode & FB_VMODE_INTERLACED)
1170 vactive--; /* the chip adds 2 halflines automatically */
1da177e4
LT		 1171 vsync_start = vactive + var->lower_margin;
1172 vsync_end = vsync_start + var->vsync_len;
1173 vtotal = vsync_end + var->upper_margin;
1174 vblank_start = vactive;
1175 vblank_end = vtotal;
1176 vblank_end = vsync_end + 1;
1177
1178 DBG_MSG("V: act %d, ss %d, se %d, tot %d bs %d, be %d\n",
1179 vactive, vsync_start, vsync_end, vtotal, vblank_start,
1180 vblank_end);
1181
1182 /* Adjust for register values, and check for overflow. */
1183 hactive--;
1184 if (check_overflow(hactive, HACTIVE_MASK, "CRTC hactive"))
1185 return 1;
1186 hsync_start--;
1187 if (check_overflow(hsync_start, HSYNCSTART_MASK, "CRTC hsync_start"))
1188 return 1;
1189 hsync_end--;
1190 if (check_overflow(hsync_end, HSYNCEND_MASK, "CRTC hsync_end"))
1191 return 1;
1192 htotal--;
1193 if (check_overflow(htotal, HTOTAL_MASK, "CRTC htotal"))
1194 return 1;
1195 hblank_start--;
1196 if (check_overflow(hblank_start, HBLANKSTART_MASK, "CRTC hblank_start"))
1197 return 1;
1198 hblank_end--;
1199 if (check_overflow(hblank_end, HBLANKEND_MASK, "CRTC hblank_end"))
1200 return 1;
1201
1202 vactive--;
1203 if (check_overflow(vactive, VACTIVE_MASK, "CRTC vactive"))
1204 return 1;
1205 vsync_start--;
1206 if (check_overflow(vsync_start, VSYNCSTART_MASK, "CRTC vsync_start"))
1207 return 1;
1208 vsync_end--;
1209 if (check_overflow(vsync_end, VSYNCEND_MASK, "CRTC vsync_end"))
1210 return 1;
1211 vtotal--;
1212 if (check_overflow(vtotal, VTOTAL_MASK, "CRTC vtotal"))
1213 return 1;
1214 vblank_start--;
1215 if (check_overflow(vblank_start, VBLANKSTART_MASK, "CRTC vblank_start"))
1216 return 1;
1217 vblank_end--;
1218 if (check_overflow(vblank_end, VBLANKEND_MASK, "CRTC vblank_end"))
1219 return 1;
1220
1221 *ht = (htotal << HTOTAL_SHIFT) | (hactive << HACTIVE_SHIFT);
1222 *hb = (hblank_start << HBLANKSTART_SHIFT) |
1223 (hblank_end << HSYNCEND_SHIFT);
1224 *hs = (hsync_start << HSYNCSTART_SHIFT) | (hsync_end << HSYNCEND_SHIFT);
1225
1226 *vt = (vtotal << VTOTAL_SHIFT) | (vactive << VACTIVE_SHIFT);
1227 *vb = (vblank_start << VBLANKSTART_SHIFT) |
1228 (vblank_end << VSYNCEND_SHIFT);
1229 *vs = (vsync_start << VSYNCSTART_SHIFT) | (vsync_end << VSYNCEND_SHIFT);
1230 *ss = (hactive << SRC_SIZE_HORIZ_SHIFT) |
1231 (vactive << SRC_SIZE_VERT_SHIFT);
1232
3587c509 1233 hw->disp_a_stride = dinfo->pitch;
1da177e4
LT		 1234 DBG_MSG("pitch is %d\n", hw->disp_a_stride);
1235
1236 hw->disp_a_base = hw->disp_a_stride * var->yoffset +
1237 var->xoffset * var->bits_per_pixel / 8;
1238
1239 hw->disp_a_base += dinfo->fb.offset << 12;
1240
1241 /* Check stride alignment. */
df7df8ab
DM		 1242 stride_alignment = IS_I9XX(dinfo) ? STRIDE_ALIGNMENT_I9XX :
1243 STRIDE_ALIGNMENT;
1244 if (hw->disp_a_stride % stride_alignment != 0) {
1da177e4 1245 WRN_MSG("display stride %d has bad alignment %d\n",
df7df8ab 1246 hw->disp_a_stride, stride_alignment);
1da177e4
LT		 1247 return 1;
1248 }
1249
1250 /* Set the palette to 8-bit mode. */
1251 *pipe_conf &= ~PIPECONF_GAMMA;
10b98368
KH		 1252
1253 if (var->vmode & FB_VMODE_INTERLACED)
1254 *pipe_conf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
1255 else
1256 *pipe_conf &= ~PIPECONF_INTERLACE_MASK;
1257
1da177e4
LT		 1258 return 0;
1259}
1260
1261/* Program a (non-VGA) video mode. */
689c9568
KH		 1262int intelfbhw_program_mode(struct intelfb_info *dinfo,
1263 const struct intelfb_hwstate *hw, int blank)
1da177e4
LT		 1264{
1265 int pipe = PIPE_A;
1266 u32 tmp;
1267 const u32 *dpll, *fp0, *fp1, *pipe_conf;
1268 const u32 *hs, *ht, *hb, *vs, *vt, *vb, *ss;
394d3af7 1269 u32 dpll_reg, fp0_reg, fp1_reg, pipe_conf_reg, pipe_stat_reg;
1da177e4
LT		 1270 u32 hsync_reg, htotal_reg, hblank_reg;
1271 u32 vsync_reg, vtotal_reg, vblank_reg;
1272 u32 src_size_reg;
7679f4d6 1273 u32 count, tmp_val[3];
1da177e4
LT		 1274
1275 /* Assume single pipe, display plane A, analog CRT. */
1276
1277#if VERBOSE > 0
1278 DBG_MSG("intelfbhw_program_mode\n");
1279#endif
1280
1281 /* Disable VGA */
1282 tmp = INREG(VGACNTRL);
1283 tmp |= VGA_DISABLE;
1284 OUTREG(VGACNTRL, tmp);
1285
1286 /* Check whether pipe A or pipe B is enabled. */
1287 if (hw->pipe_a_conf & PIPECONF_ENABLE)
1288 pipe = PIPE_A;
1289 else if (hw->pipe_b_conf & PIPECONF_ENABLE)
1290 pipe = PIPE_B;
1291
1292 dinfo->pipe = pipe;
1293
1294 if (pipe == PIPE_B) {
1295 dpll = &hw->dpll_b;
1296 fp0 = &hw->fpb0;
1297 fp1 = &hw->fpb1;
1298 pipe_conf = &hw->pipe_b_conf;
1299 hs = &hw->hsync_b;
1300 hb = &hw->hblank_b;
1301 ht = &hw->htotal_b;
1302 vs = &hw->vsync_b;
1303 vb = &hw->vblank_b;
1304 vt = &hw->vtotal_b;
1305 ss = &hw->src_size_b;
1306 dpll_reg = DPLL_B;
1307 fp0_reg = FPB0;
1308 fp1_reg = FPB1;
1309 pipe_conf_reg = PIPEBCONF;
394d3af7 1310 pipe_stat_reg = PIPEBSTAT;
1da177e4
LT		 1311 hsync_reg = HSYNC_B;
1312 htotal_reg = HTOTAL_B;
1313 hblank_reg = HBLANK_B;
1314 vsync_reg = VSYNC_B;
1315 vtotal_reg = VTOTAL_B;
1316 vblank_reg = VBLANK_B;
1317 src_size_reg = SRC_SIZE_B;
1318 } else {
1319 dpll = &hw->dpll_a;
1320 fp0 = &hw->fpa0;
1321 fp1 = &hw->fpa1;
1322 pipe_conf = &hw->pipe_a_conf;
1323 hs = &hw->hsync_a;
1324 hb = &hw->hblank_a;
1325 ht = &hw->htotal_a;
1326 vs = &hw->vsync_a;
1327 vb = &hw->vblank_a;
1328 vt = &hw->vtotal_a;
1329 ss = &hw->src_size_a;
1330 dpll_reg = DPLL_A;
1331 fp0_reg = FPA0;
1332 fp1_reg = FPA1;
1333 pipe_conf_reg = PIPEACONF;
394d3af7 1334 pipe_stat_reg = PIPEASTAT;
1da177e4
LT		 1335 hsync_reg = HSYNC_A;
1336 htotal_reg = HTOTAL_A;
1337 hblank_reg = HBLANK_A;
1338 vsync_reg = VSYNC_A;
1339 vtotal_reg = VTOTAL_A;
1340 vblank_reg = VBLANK_A;
1341 src_size_reg = SRC_SIZE_A;
1342 }
1343
7679f4d6
DA		 1344 /* turn off pipe */
1345 tmp = INREG(pipe_conf_reg);
1346 tmp &= ~PIPECONF_ENABLE;
1347 OUTREG(pipe_conf_reg, tmp);
3aff13cf 1348
7679f4d6 1349 count = 0;
8b91b0b4 1350 do {
ee5618f4
KH		 1351 tmp_val[count % 3] = INREG(PIPEA_DSL);
1352 if ((tmp_val[0] == tmp_val[1]) && (tmp_val[1] == tmp_val[2]))
3aff13cf
DA		 1353 break;
1354 count++;
1355 udelay(1);
1356 if (count % 200 == 0) {
1357 tmp = INREG(pipe_conf_reg);
1358 tmp &= ~PIPECONF_ENABLE;
1359 OUTREG(pipe_conf_reg, tmp);
1360 }
689c9568 1361 } while (count < 2000);
7679f4d6
DA		 1362
1363 OUTREG(ADPA, INREG(ADPA) & ~ADPA_DAC_ENABLE);
1364
1da177e4
LT		 1365 /* Disable planes A and B. */
1366 tmp = INREG(DSPACNTR);
1367 tmp &= ~DISPPLANE_PLANE_ENABLE;
1368 OUTREG(DSPACNTR, tmp);
1369 tmp = INREG(DSPBCNTR);
1370 tmp &= ~DISPPLANE_PLANE_ENABLE;
1371 OUTREG(DSPBCNTR, tmp);
1372
3aff13cf 1373 /* Wait for vblank. For now, just wait for a 50Hz cycle (20ms)) */
1da177e4
LT		 1374 mdelay(20);
1375
f728377f
DA		 1376 OUTREG(DVOB, INREG(DVOB) & ~PORT_ENABLE);
1377 OUTREG(DVOC, INREG(DVOC) & ~PORT_ENABLE);
1378 OUTREG(ADPA, INREG(ADPA) & ~ADPA_DAC_ENABLE);
1379
1da177e4
LT		 1380 /* Disable Sync */
1381 tmp = INREG(ADPA);
1382 tmp &= ~ADPA_DPMS_CONTROL_MASK;
1383 tmp |= ADPA_DPMS_D3;
1384 OUTREG(ADPA, tmp);
1385
7679f4d6
DA		 1386 /* do some funky magic - xyzzy */
1387 OUTREG(0x61204, 0xabcd0000);
1da177e4
LT		 1388
1389 /* turn off PLL */
1390 tmp = INREG(dpll_reg);
8c8bd037 1391 tmp &= ~DPLL_VCO_ENABLE;
1da177e4
LT		 1392 OUTREG(dpll_reg, tmp);
1393
1394 /* Set PLL parameters */
1da177e4
LT		 1395 OUTREG(fp0_reg, *fp0);
1396 OUTREG(fp1_reg, *fp1);
1397
7679f4d6 1398 /* Enable PLL */
f728377f 1399 OUTREG(dpll_reg, *dpll);
1da177e4
LT		 1400
1401 /* Set DVOs B/C */
1402 OUTREG(DVOB, hw->dvob);
1403 OUTREG(DVOC, hw->dvoc);
1404
7679f4d6
DA		 1405 /* undo funky magic */
1406 OUTREG(0x61204, 0x00000000);
1407
1da177e4 1408 /* Set ADPA */
7679f4d6 1409 OUTREG(ADPA, INREG(ADPA) | ADPA_DAC_ENABLE);
1da177e4
LT		 1410 OUTREG(ADPA, (hw->adpa & ~(ADPA_DPMS_CONTROL_MASK)) | ADPA_DPMS_D3);
1411
7679f4d6
DA		 1412 /* Set pipe parameters */
1413 OUTREG(hsync_reg, *hs);
1414 OUTREG(hblank_reg, *hb);
1415 OUTREG(htotal_reg, *ht);
1416 OUTREG(vsync_reg, *vs);
1417 OUTREG(vblank_reg, *vb);
1418 OUTREG(vtotal_reg, *vt);
1419 OUTREG(src_size_reg, *ss);
1da177e4 1420
394d3af7
KH		 1421 switch (dinfo->info->var.vmode & (FB_VMODE_INTERLACED |
1422 FB_VMODE_ODD_FLD_FIRST)) {
1423 case FB_VMODE_INTERLACED | FB_VMODE_ODD_FLD_FIRST:
1424 OUTREG(pipe_stat_reg, 0xFFFF | PIPESTAT_FLD_EVT_ODD_EN);
1425 break;
1426 case FB_VMODE_INTERLACED: /* even lines first */
1427 OUTREG(pipe_stat_reg, 0xFFFF | PIPESTAT_FLD_EVT_EVEN_EN);
1428 break;
1429 default: /* non-interlaced */
1430 OUTREG(pipe_stat_reg, 0xFFFF); /* clear all status bits only */
1431 }
1da177e4
LT		 1432 /* Enable pipe */
1433 OUTREG(pipe_conf_reg, *pipe_conf | PIPECONF_ENABLE);
1434
1435 /* Enable sync */
1436 tmp = INREG(ADPA);
1437 tmp &= ~ADPA_DPMS_CONTROL_MASK;
1438 tmp |= ADPA_DPMS_D0;
1439 OUTREG(ADPA, tmp);
1440
1441 /* setup display plane */
1442 if (dinfo->pdev->device == PCI_DEVICE_ID_INTEL_830M) {
1443 /*
1444 * i830M errata: the display plane must be enabled
1445 * to allow writes to the other bits in the plane
1446 * control register.
1447 */
1448 tmp = INREG(DSPACNTR);
1449 if ((tmp & DISPPLANE_PLANE_ENABLE) != DISPPLANE_PLANE_ENABLE) {
1450 tmp |= DISPPLANE_PLANE_ENABLE;
1451 OUTREG(DSPACNTR, tmp);
1452 OUTREG(DSPACNTR,
1453 hw->disp_a_ctrl|DISPPLANE_PLANE_ENABLE);
1454 mdelay(1);
3aff13cf 1455 }
1da177e4
LT		 1456 }
1457
1458 OUTREG(DSPACNTR, hw->disp_a_ctrl & ~DISPPLANE_PLANE_ENABLE);
1459 OUTREG(DSPASTRIDE, hw->disp_a_stride);
1460 OUTREG(DSPABASE, hw->disp_a_base);
1461
1462 /* Enable plane */
1463 if (!blank) {
1464 tmp = INREG(DSPACNTR);
1465 tmp |= DISPPLANE_PLANE_ENABLE;
1466 OUTREG(DSPACNTR, tmp);
1467 OUTREG(DSPABASE, hw->disp_a_base);
1468 }
1469
1470 return 0;
1471}
1472
1473/* forward declarations */
1474static void refresh_ring(struct intelfb_info *dinfo);
1475static void reset_state(struct intelfb_info *dinfo);
1476static void do_flush(struct intelfb_info *dinfo);
1477
71c6efd9
OJ		 1478static u32 get_ring_space(struct intelfb_info *dinfo)
1479{
1480 u32 ring_space;
1481
1482 if (dinfo->ring_tail >= dinfo->ring_head)
1483 ring_space = dinfo->ring.size -
1484 (dinfo->ring_tail - dinfo->ring_head);
1485 else
1486 ring_space = dinfo->ring_head - dinfo->ring_tail;
1487
1488 if (ring_space > RING_MIN_FREE)
1489 ring_space -= RING_MIN_FREE;
1490 else
1491 ring_space = 0;
1492
1493 return ring_space;
1494}
1495
689c9568 1496static int wait_ring(struct intelfb_info *dinfo, int n)
1da177e4
LT		 1497{
1498 int i = 0;
1499 unsigned long end;
1500 u32 last_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
1501
1502#if VERBOSE > 0
1503 DBG_MSG("wait_ring: %d\n", n);
1504#endif
1505
1506 end = jiffies + (HZ * 3);
1507 while (dinfo->ring_space < n) {
0fe6e2d2 1508 dinfo->ring_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
71c6efd9
OJ		 1509 dinfo->ring_space = get_ring_space(dinfo);
1510
0fe6e2d2 1511 if (dinfo->ring_head != last_head) {
1da177e4 1512 end = jiffies + (HZ * 3);
0fe6e2d2 1513 last_head = dinfo->ring_head;
1da177e4
LT		 1514 }
1515 i++;
1516 if (time_before(end, jiffies)) {
1517 if (!i) {
1518 /* Try again */
1519 reset_state(dinfo);
1520 refresh_ring(dinfo);
1521 do_flush(dinfo);
1522 end = jiffies + (HZ * 3);
1523 i = 1;
1524 } else {
1525 WRN_MSG("ring buffer : space: %d wanted %d\n",
1526 dinfo->ring_space, n);
1527 WRN_MSG("lockup - turning off hardware "
1528 "acceleration\n");
1529 dinfo->ring_lockup = 1;
1530 break;
1531 }
1532 }
1533 udelay(1);
1534 }
1535 return i;
1536}
1537
689c9568
KH		 1538static void do_flush(struct intelfb_info *dinfo)
1539{
1da177e4
LT		 1540 START_RING(2);
1541 OUT_RING(MI_FLUSH | MI_WRITE_DIRTY_STATE | MI_INVALIDATE_MAP_CACHE);
1542 OUT_RING(MI_NOOP);
1543 ADVANCE_RING();
1544}
1545
689c9568 1546void intelfbhw_do_sync(struct intelfb_info *dinfo)
1da177e4
LT		 1547{
1548#if VERBOSE > 0
1549 DBG_MSG("intelfbhw_do_sync\n");
1550#endif
1551
1552 if (!dinfo->accel)
1553 return;
1554
1555 /*
1556 * Send a flush, then wait until the ring is empty. This is what
1557 * the XFree86 driver does, and actually it doesn't seem a lot worse
1558 * than the recommended method (both have problems).
1559 */
1560 do_flush(dinfo);
1561 wait_ring(dinfo, dinfo->ring.size - RING_MIN_FREE);
1562 dinfo->ring_space = dinfo->ring.size - RING_MIN_FREE;
1563}
1564
689c9568 1565static void refresh_ring(struct intelfb_info *dinfo)
1da177e4
LT		 1566{
1567#if VERBOSE > 0
1568 DBG_MSG("refresh_ring\n");
1569#endif
1570
0fe6e2d2 1571 dinfo->ring_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
1da177e4 1572 dinfo->ring_tail = INREG(PRI_RING_TAIL) & RING_TAIL_MASK;
71c6efd9 1573 dinfo->ring_space = get_ring_space(dinfo);
1da177e4
LT		 1574}
1575
689c9568 1576static void reset_state(struct intelfb_info *dinfo)
1da177e4
LT		 1577{
1578 int i;
1579 u32 tmp;
1580
1581#if VERBOSE > 0
1582 DBG_MSG("reset_state\n");
1583#endif
1584
1585 for (i = 0; i < FENCE_NUM; i++)
1586 OUTREG(FENCE + (i << 2), 0);
1587
1588 /* Flush the ring buffer if it's enabled. */
1589 tmp = INREG(PRI_RING_LENGTH);
1590 if (tmp & RING_ENABLE) {
1591#if VERBOSE > 0
1592 DBG_MSG("reset_state: ring was enabled\n");
1593#endif
1594 refresh_ring(dinfo);
1595 intelfbhw_do_sync(dinfo);
1596 DO_RING_IDLE();
1597 }
1598
1599 OUTREG(PRI_RING_LENGTH, 0);
1600 OUTREG(PRI_RING_HEAD, 0);
1601 OUTREG(PRI_RING_TAIL, 0);
1602 OUTREG(PRI_RING_START, 0);
1603}
1604
1605/* Stop the 2D engine, and turn off the ring buffer. */
689c9568 1606void intelfbhw_2d_stop(struct intelfb_info *dinfo)
1da177e4
LT		 1607{
1608#if VERBOSE > 0
689c9568
KH		 1609 DBG_MSG("intelfbhw_2d_stop: accel: %d, ring_active: %d\n",
1610 dinfo->accel, dinfo->ring_active);
1da177e4
LT		 1611#endif
1612
1613 if (!dinfo->accel)
1614 return;
1615
1616 dinfo->ring_active = 0;
1617 reset_state(dinfo);
1618}
1619
1620/*
1621 * Enable the ring buffer, and initialise the 2D engine.
1622 * It is assumed that the graphics engine has been stopped by previously
1623 * calling intelfb_2d_stop().
1624 */
689c9568 1625void intelfbhw_2d_start(struct intelfb_info *dinfo)
1da177e4
LT		 1626{
1627#if VERBOSE > 0
1628 DBG_MSG("intelfbhw_2d_start: accel: %d, ring_active: %d\n",
1629 dinfo->accel, dinfo->ring_active);
1630#endif
1631
1632 if (!dinfo->accel)
1633 return;
1634
1635 /* Initialise the primary ring buffer. */
1636 OUTREG(PRI_RING_LENGTH, 0);
1637 OUTREG(PRI_RING_TAIL, 0);
1638 OUTREG(PRI_RING_HEAD, 0);
1639
1640 OUTREG(PRI_RING_START, dinfo->ring.physical & RING_START_MASK);
1641 OUTREG(PRI_RING_LENGTH,
1642 ((dinfo->ring.size - GTT_PAGE_SIZE) & RING_LENGTH_MASK) |
1643 RING_NO_REPORT | RING_ENABLE);
1644 refresh_ring(dinfo);
1645 dinfo->ring_active = 1;
1646}
1647
1648/* 2D fillrect (solid fill or invert) */
689c9568
KH		 1649void intelfbhw_do_fillrect(struct intelfb_info *dinfo, u32 x, u32 y, u32 w,
1650 u32 h, u32 color, u32 pitch, u32 bpp, u32 rop)
1da177e4
LT		 1651{
1652 u32 br00, br09, br13, br14, br16;
1653
1654#if VERBOSE > 0
1655 DBG_MSG("intelfbhw_do_fillrect: (%d,%d) %dx%d, c 0x%06x, p %d bpp %d, "
1656 "rop 0x%02x\n", x, y, w, h, color, pitch, bpp, rop);
1657#endif
1658
1659 br00 = COLOR_BLT_CMD;
1660 br09 = dinfo->fb_start + (y * pitch + x * (bpp / 8));
1661 br13 = (rop << ROP_SHIFT) | pitch;
1662 br14 = (h << HEIGHT_SHIFT) | ((w * (bpp / 8)) << WIDTH_SHIFT);
1663 br16 = color;
1664
1665 switch (bpp) {
1666 case 8:
1667 br13 |= COLOR_DEPTH_8;
1668 break;
1669 case 16:
1670 br13 |= COLOR_DEPTH_16;
1671 break;
1672 case 32:
1673 br13 |= COLOR_DEPTH_32;
1674 br00 |= WRITE_ALPHA | WRITE_RGB;
1675 break;
1676 }
1677
1678 START_RING(6);
1679 OUT_RING(br00);
1680 OUT_RING(br13);
1681 OUT_RING(br14);
1682 OUT_RING(br09);
1683 OUT_RING(br16);
1684 OUT_RING(MI_NOOP);
1685 ADVANCE_RING();
1686
1687#if VERBOSE > 0
1688 DBG_MSG("ring = 0x%08x, 0x%08x (%d)\n", dinfo->ring_head,
1689 dinfo->ring_tail, dinfo->ring_space);
1690#endif
1691}
1692
1693void
1694intelfbhw_do_bitblt(struct intelfb_info *dinfo, u32 curx, u32 cury,
1695 u32 dstx, u32 dsty, u32 w, u32 h, u32 pitch, u32 bpp)
1696{
1697 u32 br00, br09, br11, br12, br13, br22, br23, br26;
1698
1699#if VERBOSE > 0
1700 DBG_MSG("intelfbhw_do_bitblt: (%d,%d)->(%d,%d) %dx%d, p %d bpp %d\n",
1701 curx, cury, dstx, dsty, w, h, pitch, bpp);
1702#endif
1703
1704 br00 = XY_SRC_COPY_BLT_CMD;
1705 br09 = dinfo->fb_start;
1706 br11 = (pitch << PITCH_SHIFT);
1707 br12 = dinfo->fb_start;
1708 br13 = (SRC_ROP_GXCOPY << ROP_SHIFT) | (pitch << PITCH_SHIFT);
1709 br22 = (dstx << WIDTH_SHIFT) | (dsty << HEIGHT_SHIFT);
1710 br23 = ((dstx + w) << WIDTH_SHIFT) |
1711 ((dsty + h) << HEIGHT_SHIFT);
1712 br26 = (curx << WIDTH_SHIFT) | (cury << HEIGHT_SHIFT);
1713
1714 switch (bpp) {
1715 case 8:
1716 br13 |= COLOR_DEPTH_8;
1717 break;
1718 case 16:
1719 br13 |= COLOR_DEPTH_16;
1720 break;
1721 case 32:
1722 br13 |= COLOR_DEPTH_32;
1723 br00 |= WRITE_ALPHA | WRITE_RGB;
1724 break;
1725 }
1726
1727 START_RING(8);
1728 OUT_RING(br00);
1729 OUT_RING(br13);
1730 OUT_RING(br22);
1731 OUT_RING(br23);
1732 OUT_RING(br09);
1733 OUT_RING(br26);
1734 OUT_RING(br11);
1735 OUT_RING(br12);
1736 ADVANCE_RING();
1737}
1738
689c9568
KH		 1739int intelfbhw_do_drawglyph(struct intelfb_info *dinfo, u32 fg, u32 bg, u32 w,
1740 u32 h, const u8* cdat, u32 x, u32 y, u32 pitch,
1741 u32 bpp)
1da177e4
LT		 1742{
1743 int nbytes, ndwords, pad, tmp;
1744 u32 br00, br09, br13, br18, br19, br22, br23;
1745 int dat, ix, iy, iw;
1746 int i, j;
1747
1748#if VERBOSE > 0
1749 DBG_MSG("intelfbhw_do_drawglyph: (%d,%d) %dx%d\n", x, y, w, h);
1750#endif
1751
1752 /* size in bytes of a padded scanline */
1753 nbytes = ROUND_UP_TO(w, 16) / 8;
1754
1755 /* Total bytes of padded scanline data to write out. */
1756 nbytes = nbytes * h;
1757
1758 /*
1759 * Check if the glyph data exceeds the immediate mode limit.
1760 * It would take a large font (1K pixels) to hit this limit.
1761 */
1762 if (nbytes > MAX_MONO_IMM_SIZE)
1763 return 0;
1764
1765 /* Src data is packaged a dword (32-bit) at a time. */
1766 ndwords = ROUND_UP_TO(nbytes, 4) / 4;
1767
1768 /*
1769 * Ring has to be padded to a quad word. But because the command starts
1770 with 7 bytes, pad only if there is an even number of ndwords
1771 */
1772 pad = !(ndwords % 2);
1773
1774 tmp = (XY_MONO_SRC_IMM_BLT_CMD & DW_LENGTH_MASK) + ndwords;
1775 br00 = (XY_MONO_SRC_IMM_BLT_CMD & ~DW_LENGTH_MASK) | tmp;
1776 br09 = dinfo->fb_start;
1777 br13 = (SRC_ROP_GXCOPY << ROP_SHIFT) | (pitch << PITCH_SHIFT);
1778 br18 = bg;
1779 br19 = fg;
1780 br22 = (x << WIDTH_SHIFT) | (y << HEIGHT_SHIFT);
1781 br23 = ((x + w) << WIDTH_SHIFT) | ((y + h) << HEIGHT_SHIFT);
1782
1783 switch (bpp) {
1784 case 8:
1785 br13 |= COLOR_DEPTH_8;
1786 break;
1787 case 16:
1788 br13 |= COLOR_DEPTH_16;
1789 break;
1790 case 32:
1791 br13 |= COLOR_DEPTH_32;
1792 br00 |= WRITE_ALPHA | WRITE_RGB;
1793 break;
1794 }
1795
1796 START_RING(8 + ndwords);
1797 OUT_RING(br00);
1798 OUT_RING(br13);
1799 OUT_RING(br22);
1800 OUT_RING(br23);
1801 OUT_RING(br09);
1802 OUT_RING(br18);
1803 OUT_RING(br19);
1804 ix = iy = 0;
1805 iw = ROUND_UP_TO(w, 8) / 8;
1806 while (ndwords--) {
1807 dat = 0;
1808 for (j = 0; j < 2; ++j) {
1809 for (i = 0; i < 2; ++i) {
1810 if (ix != iw || i == 0)
1811 dat |= cdat[iy*iw + ix++] << (i+j*2)*8;
1812 }
1813 if (ix == iw && iy != (h-1)) {
1814 ix = 0;
1815 ++iy;
1816 }
1817 }
1818 OUT_RING(dat);
1819 }
1820 if (pad)
1821 OUT_RING(MI_NOOP);
1822 ADVANCE_RING();
1823
1824 return 1;
1825}
1826
1827/* HW cursor functions. */
689c9568 1828void intelfbhw_cursor_init(struct intelfb_info *dinfo)
1da177e4
LT		 1829{
1830 u32 tmp;
1831
1832#if VERBOSE > 0
1833 DBG_MSG("intelfbhw_cursor_init\n");
1834#endif
1835
3aff13cf 1836 if (dinfo->mobile || IS_I9XX(dinfo)) {
1da177e4
LT		 1837 if (!dinfo->cursor.physical)
1838 return;
1839 tmp = INREG(CURSOR_A_CONTROL);
1840 tmp &= ~(CURSOR_MODE_MASK | CURSOR_MOBILE_GAMMA_ENABLE |
1841 CURSOR_MEM_TYPE_LOCAL |
1842 (1 << CURSOR_PIPE_SELECT_SHIFT));
1843 tmp |= CURSOR_MODE_DISABLE;
1844 OUTREG(CURSOR_A_CONTROL, tmp);
1845 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1846 } else {
1847 tmp = INREG(CURSOR_CONTROL);
1848 tmp &= ~(CURSOR_FORMAT_MASK | CURSOR_GAMMA_ENABLE |
1849 CURSOR_ENABLE | CURSOR_STRIDE_MASK);
1850 tmp = CURSOR_FORMAT_3C;
1851 OUTREG(CURSOR_CONTROL, tmp);
1852 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.offset << 12);
1853 tmp = (64 << CURSOR_SIZE_H_SHIFT) |
1854 (64 << CURSOR_SIZE_V_SHIFT);
1855 OUTREG(CURSOR_SIZE, tmp);
1856 }
1857}
1858
689c9568 1859void intelfbhw_cursor_hide(struct intelfb_info *dinfo)
1da177e4
LT		 1860{
1861 u32 tmp;
1862
1863#if VERBOSE > 0
1864 DBG_MSG("intelfbhw_cursor_hide\n");
1865#endif
1866
1867 dinfo->cursor_on = 0;
3aff13cf 1868 if (dinfo->mobile || IS_I9XX(dinfo)) {
1da177e4
LT		 1869 if (!dinfo->cursor.physical)
1870 return;
1871 tmp = INREG(CURSOR_A_CONTROL);
1872 tmp &= ~CURSOR_MODE_MASK;
1873 tmp |= CURSOR_MODE_DISABLE;
1874 OUTREG(CURSOR_A_CONTROL, tmp);
1875 /* Flush changes */
1876 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1877 } else {
1878 tmp = INREG(CURSOR_CONTROL);
1879 tmp &= ~CURSOR_ENABLE;
1880 OUTREG(CURSOR_CONTROL, tmp);
1881 }
1882}
1883
689c9568 1884void intelfbhw_cursor_show(struct intelfb_info *dinfo)
1da177e4
LT		 1885{
1886 u32 tmp;
1887
1888#if VERBOSE > 0
1889 DBG_MSG("intelfbhw_cursor_show\n");
1890#endif
1891
1892 dinfo->cursor_on = 1;
1893
1894 if (dinfo->cursor_blanked)
1895 return;
1896
3aff13cf 1897 if (dinfo->mobile || IS_I9XX(dinfo)) {
1da177e4
LT		 1898 if (!dinfo->cursor.physical)
1899 return;
1900 tmp = INREG(CURSOR_A_CONTROL);
1901 tmp &= ~CURSOR_MODE_MASK;
1902 tmp |= CURSOR_MODE_64_4C_AX;
1903 OUTREG(CURSOR_A_CONTROL, tmp);
1904 /* Flush changes */
1905 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1906 } else {
1907 tmp = INREG(CURSOR_CONTROL);
1908 tmp |= CURSOR_ENABLE;
1909 OUTREG(CURSOR_CONTROL, tmp);
1910 }
1911}
1912
689c9568 1913void intelfbhw_cursor_setpos(struct intelfb_info *dinfo, int x, int y)
1da177e4
LT		 1914{
1915 u32 tmp;
1916
1917#if VERBOSE > 0
1918 DBG_MSG("intelfbhw_cursor_setpos: (%d, %d)\n", x, y);
1919#endif
1920
1921 /*
3aff13cf
DA		 1922 * Sets the position. The coordinates are assumed to already
1923 * have any offset adjusted. Assume that the cursor is never
1da177e4
LT		 1924 * completely off-screen, and that x, y are always >= 0.
1925 */
1926
1927 tmp = ((x & CURSOR_POS_MASK) << CURSOR_X_SHIFT) |
1928 ((y & CURSOR_POS_MASK) << CURSOR_Y_SHIFT);
1929 OUTREG(CURSOR_A_POSITION, tmp);
8bb91f6a 1930
689c9568 1931 if (IS_I9XX(dinfo))
8bb91f6a 1932 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1da177e4
LT		 1933}
1934
689c9568 1935void intelfbhw_cursor_setcolor(struct intelfb_info *dinfo, u32 bg, u32 fg)
1da177e4
LT		 1936{
1937#if VERBOSE > 0
1938 DBG_MSG("intelfbhw_cursor_setcolor\n");
1939#endif
1940
1941 OUTREG(CURSOR_A_PALETTE0, bg & CURSOR_PALETTE_MASK);
1942 OUTREG(CURSOR_A_PALETTE1, fg & CURSOR_PALETTE_MASK);
1943 OUTREG(CURSOR_A_PALETTE2, fg & CURSOR_PALETTE_MASK);
1944 OUTREG(CURSOR_A_PALETTE3, bg & CURSOR_PALETTE_MASK);
1945}
1946
689c9568
KH		 1947void intelfbhw_cursor_load(struct intelfb_info *dinfo, int width, int height,
1948 u8 *data)
1da177e4
LT		 1949{
1950 u8 __iomem *addr = (u8 __iomem *)dinfo->cursor.virtual;
1951 int i, j, w = width / 8;
1952 int mod = width % 8, t_mask, d_mask;
1953
1954#if VERBOSE > 0
1955 DBG_MSG("intelfbhw_cursor_load\n");
1956#endif
1957
1958 if (!dinfo->cursor.virtual)
1959 return;
1960
1961 t_mask = 0xff >> mod;
1962 d_mask = ~(0xff >> mod);
1963 for (i = height; i--; ) {
1964 for (j = 0; j < w; j++) {
1965 writeb(0x00, addr + j);
1966 writeb(*(data++), addr + j+8);
1967 }
1968 if (mod) {
1969 writeb(t_mask, addr + j);
1970 writeb(*(data++) & d_mask, addr + j+8);
1971 }
1972 addr += 16;
1973 }
1974}
1975
689c9568
KH		 1976void intelfbhw_cursor_reset(struct intelfb_info *dinfo)
1977{
1da177e4
LT		 1978 u8 __iomem *addr = (u8 __iomem *)dinfo->cursor.virtual;
1979 int i, j;
1980
1981#if VERBOSE > 0
1982 DBG_MSG("intelfbhw_cursor_reset\n");
1983#endif
1984
1985 if (!dinfo->cursor.virtual)
1986 return;
1987
1988 for (i = 64; i--; ) {
1989 for (j = 0; j < 8; j++) {
1990 writeb(0xff, addr + j+0);
1991 writeb(0x00, addr + j+8);
1992 }
1993 addr += 16;
1994 }
1995}
7649757b 1996
394d3af7
KH		 1997static irqreturn_t intelfbhw_irq(int irq, void *dev_id)
1998{
7649757b 1999 u16 tmp;
15aafa2f 2000 struct intelfb_info *dinfo = dev_id;
7649757b
EH		 2001
2002 spin_lock(&dinfo->int_lock);
2003
2004 tmp = INREG16(IIR);
394d3af7
KH		 2005 if (dinfo->info->var.vmode & FB_VMODE_INTERLACED)
2006 tmp &= PIPE_A_EVENT_INTERRUPT;
2007 else
2008 tmp &= VSYNC_PIPE_A_INTERRUPT; /* non-interlaced */
7649757b
EH		 2009
2010 if (tmp == 0) {
2011 spin_unlock(&dinfo->int_lock);
394d3af7 2012 return IRQ_RETVAL(0); /* not us */
7649757b
EH		 2013 }
2014
394d3af7
KH		 2015 /* clear status bits 0-15 ASAP and don't touch bits 16-31 */
2016 OUTREG(PIPEASTAT, INREG(PIPEASTAT));
7649757b 2017
394d3af7
KH		 2018 OUTREG16(IIR, tmp);
2019 if (dinfo->vsync.pan_display) {
2020 dinfo->vsync.pan_display = 0;
2021 OUTREG(DSPABASE, dinfo->vsync.pan_offset);
7649757b
EH		 2022 }
2023
394d3af7
KH		 2024 dinfo->vsync.count++;
2025 wake_up_interruptible(&dinfo->vsync.wait);
2026
7649757b
EH		 2027 spin_unlock(&dinfo->int_lock);
2028
394d3af7 2029 return IRQ_RETVAL(1);
7649757b
EH		 2030}
2031
394d3af7
KH		 2032int intelfbhw_enable_irq(struct intelfb_info *dinfo)
2033{
2034 u16 tmp;
7649757b 2035 if (!test_and_set_bit(0, &dinfo->irq_flags)) {
38515e90 2036 if (request_irq(dinfo->pdev->irq, intelfbhw_irq, IRQF_SHARED,
394d3af7 2037 "intelfb", dinfo)) {
7649757b
EH		 2038 clear_bit(0, &dinfo->irq_flags);
2039 return -EINVAL;
2040 }
2041
2042 spin_lock_irq(&dinfo->int_lock);
394d3af7
KH		 2043 OUTREG16(HWSTAM, 0xfffe); /* i830 DRM uses ffff */
2044 OUTREG16(IMR, 0);
2045 } else
7649757b 2046 spin_lock_irq(&dinfo->int_lock);
394d3af7
KH		 2047
2048 if (dinfo->info->var.vmode & FB_VMODE_INTERLACED)
2049 tmp = PIPE_A_EVENT_INTERRUPT;
2050 else
2051 tmp = VSYNC_PIPE_A_INTERRUPT; /* non-interlaced */
2052 if (tmp != INREG16(IER)) {
2053 DBG_MSG("changing IER to 0x%X\n", tmp);
2054 OUTREG16(IER, tmp);
7649757b 2055 }
394d3af7
KH		 2056
2057 spin_unlock_irq(&dinfo->int_lock);
7649757b
EH		 2058 return 0;
2059}
2060
394d3af7
KH		 2061void intelfbhw_disable_irq(struct intelfb_info *dinfo)
2062{
7649757b 2063 if (test_and_clear_bit(0, &dinfo->irq_flags)) {
f80d0d23
EH		 2064 if (dinfo->vsync.pan_display) {
2065 dinfo->vsync.pan_display = 0;
2066 OUTREG(DSPABASE, dinfo->vsync.pan_offset);
2067 }
7649757b
EH		 2068 spin_lock_irq(&dinfo->int_lock);
2069 OUTREG16(HWSTAM, 0xffff);
2070 OUTREG16(IMR, 0xffff);
2071 OUTREG16(IER, 0x0);
2072
ee5618f4 2073 OUTREG16(IIR, INREG16(IIR)); /* clear IRQ requests */
7649757b
EH		 2074 spin_unlock_irq(&dinfo->int_lock);
2075
2076 free_irq(dinfo->pdev->irq, dinfo);
2077 }
2078}
37bced38 2079
689c9568
KH		 2080int intelfbhw_wait_for_vsync(struct intelfb_info *dinfo, u32 pipe)
2081{
37bced38
EH		 2082 struct intelfb_vsync *vsync;
2083 unsigned int count;
2084 int ret;
2085
2086 switch (pipe) {
2087 case 0:
2088 vsync = &dinfo->vsync;
2089 break;
2090 default:
2091 return -ENODEV;
2092 }
2093
394d3af7 2094 ret = intelfbhw_enable_irq(dinfo);
689c9568 2095 if (ret)
37bced38 2096 return ret;
37bced38
EH		 2097
2098 count = vsync->count;
689c9568
KH		 2099 ret = wait_event_interruptible_timeout(vsync->wait,
2100 count != vsync->count, HZ / 10);
2101 if (ret < 0)
37bced38 2102 return ret;
37bced38 2103 if (ret == 0) {
37bced38
EH		 2104 DBG_MSG("wait_for_vsync timed out!\n");
2105 return -ETIMEDOUT;
2106 }
2107
2108 return 0;
2109}
Linux 6.x block layer and io_uring tree(s)