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fbdev/hyperv_fb: Do not clear global screen_info
[linux-2.6-block.git] / drivers / video / fbdev / 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/delay.h>
28#include <linux/fb.h>
1da177e4
LT		 29#include <linux/ioport.h>
30#include <linux/init.h>
31#include <linux/pci.h>
32#include <linux/vmalloc.h>
1da177e4 33#include <linux/pagemap.h>
7649757b 34#include <linux/interrupt.h>
1da177e4
LT		 35
36#include <asm/io.h>
37
38#include "intelfb.h"
39#include "intelfbhw.h"
40
7258b11d 41struct pll_min_max {
51d79747
DA		 42 int min_m, max_m, min_m1, max_m1;
43 int min_m2, max_m2, min_n, max_n;
44 int min_p, max_p, min_p1, max_p1;
45 int min_vco, max_vco, p_transition_clk, ref_clk;
16109b3f 46 int p_inc_lo, p_inc_hi;
7258b11d
DA		 47};
48
49#define PLLS_I8xx 0
50#define PLLS_I9xx 1
51#define PLLS_MAX 2
52
46f60b8e 53static struct pll_min_max plls[PLLS_MAX] = {
51d79747
DA		 54 { 108, 140, 18, 26,
55 6, 16, 3, 16,
56 4, 128, 0, 31,
57 930000, 1400000, 165000, 48000,
689c9568 58 4, 2 }, /* I8xx */
51d79747
DA		 59
60 { 75, 120, 10, 20,
61 5, 9, 4, 7,
62 5, 80, 1, 8,
63 1400000, 2800000, 200000, 96000,
689c9568 64 10, 5 } /* I9xx */
7258b11d
DA		 65};
66
689c9568 67int intelfbhw_get_chipset(struct pci_dev *pdev, struct intelfb_info *dinfo)
1da177e4
LT		 68{
69 u32 tmp;
d024960c 70 if (!pdev || !dinfo)
1da177e4
LT		 71 return 1;
72
73 switch (pdev->device) {
74 case PCI_DEVICE_ID_INTEL_830M:
d024960c
DA		 75 dinfo->name = "Intel(R) 830M";
76 dinfo->chipset = INTEL_830M;
77 dinfo->mobile = 1;
78 dinfo->pll_index = PLLS_I8xx;
1da177e4
LT		 79 return 0;
80 case PCI_DEVICE_ID_INTEL_845G:
d024960c
DA		 81 dinfo->name = "Intel(R) 845G";
82 dinfo->chipset = INTEL_845G;
83 dinfo->mobile = 0;
84 dinfo->pll_index = PLLS_I8xx;
1da177e4 85 return 0;
347486bb
SH		 86 case PCI_DEVICE_ID_INTEL_854:
87 dinfo->mobile = 1;
88 dinfo->name = "Intel(R) 854";
89 dinfo->chipset = INTEL_854;
90 return 0;
1da177e4
LT		 91 case PCI_DEVICE_ID_INTEL_85XGM:
92 tmp = 0;
d024960c
DA		 93 dinfo->mobile = 1;
94 dinfo->pll_index = PLLS_I8xx;
1da177e4
LT		 95 pci_read_config_dword(pdev, INTEL_85X_CAPID, &tmp);
96 switch ((tmp >> INTEL_85X_VARIANT_SHIFT) &
97 INTEL_85X_VARIANT_MASK) {
98 case INTEL_VAR_855GME:
d024960c
DA		 99 dinfo->name = "Intel(R) 855GME";
100 dinfo->chipset = INTEL_855GME;
1da177e4
LT		 101 return 0;
102 case INTEL_VAR_855GM:
d024960c
DA		 103 dinfo->name = "Intel(R) 855GM";
104 dinfo->chipset = INTEL_855GM;
1da177e4
LT		 105 return 0;
106 case INTEL_VAR_852GME:
d024960c
DA		 107 dinfo->name = "Intel(R) 852GME";
108 dinfo->chipset = INTEL_852GME;
1da177e4
LT		 109 return 0;
110 case INTEL_VAR_852GM:
d024960c
DA		 111 dinfo->name = "Intel(R) 852GM";
112 dinfo->chipset = INTEL_852GM;
1da177e4
LT		 113 return 0;
114 default:
d024960c
DA		 115 dinfo->name = "Intel(R) 852GM/855GM";
116 dinfo->chipset = INTEL_85XGM;
1da177e4
LT		 117 return 0;
118 }
119 break;
120 case PCI_DEVICE_ID_INTEL_865G:
d024960c
DA		 121 dinfo->name = "Intel(R) 865G";
122 dinfo->chipset = INTEL_865G;
123 dinfo->mobile = 0;
124 dinfo->pll_index = PLLS_I8xx;
1da177e4
LT		 125 return 0;
126 case PCI_DEVICE_ID_INTEL_915G:
d024960c
DA		 127 dinfo->name = "Intel(R) 915G";
128 dinfo->chipset = INTEL_915G;
129 dinfo->mobile = 0;
130 dinfo->pll_index = PLLS_I9xx;
1da177e4 131 return 0;
3a59026b 132 case PCI_DEVICE_ID_INTEL_915GM:
d024960c
DA		 133 dinfo->name = "Intel(R) 915GM";
134 dinfo->chipset = INTEL_915GM;
135 dinfo->mobile = 1;
136 dinfo->pll_index = PLLS_I9xx;
3a59026b 137 return 0;
9639d5ec
DA		 138 case PCI_DEVICE_ID_INTEL_945G:
139 dinfo->name = "Intel(R) 945G";
140 dinfo->chipset = INTEL_945G;
141 dinfo->mobile = 0;
142 dinfo->pll_index = PLLS_I9xx;
143 return 0;
9a90603f
DA		 144 case PCI_DEVICE_ID_INTEL_945GM:
145 dinfo->name = "Intel(R) 945GM";
146 dinfo->chipset = INTEL_945GM;
147 dinfo->mobile = 1;
148 dinfo->pll_index = PLLS_I9xx;
149 return 0;
3f7a26b4
PE		 150 case PCI_DEVICE_ID_INTEL_945GME:
151 dinfo->name = "Intel(R) 945GME";
152 dinfo->chipset = INTEL_945GME;
153 dinfo->mobile = 1;
154 dinfo->pll_index = PLLS_I9xx;
155 return 0;
0e170c72
MB		 156 case PCI_DEVICE_ID_INTEL_965G:
157 dinfo->name = "Intel(R) 965G";
158 dinfo->chipset = INTEL_965G;
159 dinfo->mobile = 0;
160 dinfo->pll_index = PLLS_I9xx;
161 return 0;
162 case PCI_DEVICE_ID_INTEL_965GM:
163 dinfo->name = "Intel(R) 965GM";
164 dinfo->chipset = INTEL_965GM;
165 dinfo->mobile = 1;
166 dinfo->pll_index = PLLS_I9xx;
167 return 0;
1da177e4
LT		 168 default:
169 return 1;
170 }
171}
172
689c9568
KH		 173int intelfbhw_get_memory(struct pci_dev *pdev, int *aperture_size,
174 int *stolen_size)
1da177e4
LT		 175{
176 struct pci_dev *bridge_dev;
177 u16 tmp;
1aecb393 178 int stolen_overhead;
1da177e4
LT		 179
180 if (!pdev || !aperture_size || !stolen_size)
181 return 1;
182
183 /* Find the bridge device. It is always 0:0.0 */
e587467a
SK		 184 bridge_dev = pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus), 0,
185 PCI_DEVFN(0, 0));
186 if (!bridge_dev) {
1da177e4
LT		 187 ERR_MSG("cannot find bridge device\n");
188 return 1;
189 }
190
191 /* Get the fb aperture size and "stolen" memory amount. */
192 tmp = 0;
193 pci_read_config_word(bridge_dev, INTEL_GMCH_CTRL, &tmp);
a77b8950
AC		 194 pci_dev_put(bridge_dev);
195
1da177e4 196 switch (pdev->device) {
1aecb393
EH		 197 case PCI_DEVICE_ID_INTEL_915G:
198 case PCI_DEVICE_ID_INTEL_915GM:
199 case PCI_DEVICE_ID_INTEL_945G:
200 case PCI_DEVICE_ID_INTEL_945GM:
3f7a26b4 201 case PCI_DEVICE_ID_INTEL_945GME:
0e170c72
MB		 202 case PCI_DEVICE_ID_INTEL_965G:
203 case PCI_DEVICE_ID_INTEL_965GM:
25c9a15f
PC		 204 /*
205 * 915, 945 and 965 chipsets support 64MB, 128MB or 256MB
206 * aperture. Determine size from PCI resource length.
207 */
208 *aperture_size = pci_resource_len(pdev, 2);
1aecb393
EH		 209 break;
210 default:
1da177e4
LT		 211 if ((tmp & INTEL_GMCH_MEM_MASK) == INTEL_GMCH_MEM_64M)
212 *aperture_size = MB(64);
213 else
214 *aperture_size = MB(128);
1aecb393
EH		 215 break;
216 }
217
218 /* Stolen memory size is reduced by the GTT and the popup.
219 GTT is 1K per MB of aperture size, and popup is 4K. */
220 stolen_overhead = (*aperture_size / MB(1)) + 4;
221 switch(pdev->device) {
222 case PCI_DEVICE_ID_INTEL_830M:
223 case PCI_DEVICE_ID_INTEL_845G:
1da177e4
LT		 224 switch (tmp & INTEL_830_GMCH_GMS_MASK) {
225 case INTEL_830_GMCH_GMS_STOLEN_512:
1aecb393 226 *stolen_size = KB(512) - KB(stolen_overhead);
1da177e4
LT		 227 return 0;
228 case INTEL_830_GMCH_GMS_STOLEN_1024:
1aecb393 229 *stolen_size = MB(1) - KB(stolen_overhead);
1da177e4
LT		 230 return 0;
231 case INTEL_830_GMCH_GMS_STOLEN_8192:
1aecb393 232 *stolen_size = MB(8) - KB(stolen_overhead);
1da177e4
LT		 233 return 0;
234 case INTEL_830_GMCH_GMS_LOCAL:
235 ERR_MSG("only local memory found\n");
236 return 1;
237 case INTEL_830_GMCH_GMS_DISABLED:
238 ERR_MSG("video memory is disabled\n");
239 return 1;
240 default:
241 ERR_MSG("unexpected GMCH_GMS value: 0x%02x\n",
242 tmp & INTEL_830_GMCH_GMS_MASK);
243 return 1;
244 }
245 break;
246 default:
1da177e4
LT		 247 switch (tmp & INTEL_855_GMCH_GMS_MASK) {
248 case INTEL_855_GMCH_GMS_STOLEN_1M:
1aecb393 249 *stolen_size = MB(1) - KB(stolen_overhead);
1da177e4
LT		 250 return 0;
251 case INTEL_855_GMCH_GMS_STOLEN_4M:
1aecb393 252 *stolen_size = MB(4) - KB(stolen_overhead);
1da177e4
LT		 253 return 0;
254 case INTEL_855_GMCH_GMS_STOLEN_8M:
1aecb393 255 *stolen_size = MB(8) - KB(stolen_overhead);
1da177e4
LT		 256 return 0;
257 case INTEL_855_GMCH_GMS_STOLEN_16M:
1aecb393 258 *stolen_size = MB(16) - KB(stolen_overhead);
1da177e4
LT		 259 return 0;
260 case INTEL_855_GMCH_GMS_STOLEN_32M:
1aecb393 261 *stolen_size = MB(32) - KB(stolen_overhead);
1da177e4
LT		 262 return 0;
263 case INTEL_915G_GMCH_GMS_STOLEN_48M:
1aecb393 264 *stolen_size = MB(48) - KB(stolen_overhead);
1da177e4
LT		 265 return 0;
266 case INTEL_915G_GMCH_GMS_STOLEN_64M:
1aecb393 267 *stolen_size = MB(64) - KB(stolen_overhead);
1da177e4
LT		 268 return 0;
269 case INTEL_855_GMCH_GMS_DISABLED:
270 ERR_MSG("video memory is disabled\n");
271 return 0;
272 default:
273 ERR_MSG("unexpected GMCH_GMS value: 0x%02x\n",
274 tmp & INTEL_855_GMCH_GMS_MASK);
275 return 1;
276 }
277 }
278}
279
689c9568 280int intelfbhw_check_non_crt(struct intelfb_info *dinfo)
1da177e4
LT		 281{
282 int dvo = 0;
283
284 if (INREG(LVDS) & PORT_ENABLE)
285 dvo |= LVDS_PORT;
286 if (INREG(DVOA) & PORT_ENABLE)
287 dvo |= DVOA_PORT;
288 if (INREG(DVOB) & PORT_ENABLE)
289 dvo |= DVOB_PORT;
290 if (INREG(DVOC) & PORT_ENABLE)
291 dvo |= DVOC_PORT;
292
293 return dvo;
294}
295
689c9568 296const char * intelfbhw_dvo_to_string(int dvo)
1da177e4
LT		 297{
298 if (dvo & DVOA_PORT)
299 return "DVO port A";
300 else if (dvo & DVOB_PORT)
301 return "DVO port B";
302 else if (dvo & DVOC_PORT)
303 return "DVO port C";
304 else if (dvo & LVDS_PORT)
305 return "LVDS port";
306 else
307 return NULL;
308}
309
310
689c9568
KH		 311int intelfbhw_validate_mode(struct intelfb_info *dinfo,
312 struct fb_var_screeninfo *var)
1da177e4
LT		 313{
314 int bytes_per_pixel;
315 int tmp;
316
317#if VERBOSE > 0
318 DBG_MSG("intelfbhw_validate_mode\n");
319#endif
320
321 bytes_per_pixel = var->bits_per_pixel / 8;
322 if (bytes_per_pixel == 3)
323 bytes_per_pixel = 4;
324
325 /* Check if enough video memory. */
326 tmp = var->yres_virtual * var->xres_virtual * bytes_per_pixel;
327 if (tmp > dinfo->fb.size) {
328 WRN_MSG("Not enough video ram for mode "
329 "(%d KByte vs %d KByte).\n",
330 BtoKB(tmp), BtoKB(dinfo->fb.size));
331 return 1;
332 }
333
334 /* Check if x/y limits are OK. */
335 if (var->xres - 1 > HACTIVE_MASK) {
336 WRN_MSG("X resolution too large (%d vs %d).\n",
337 var->xres, HACTIVE_MASK + 1);
338 return 1;
339 }
340 if (var->yres - 1 > VACTIVE_MASK) {
341 WRN_MSG("Y resolution too large (%d vs %d).\n",
342 var->yres, VACTIVE_MASK + 1);
343 return 1;
344 }
28ebe4f6
KH		 345 if (var->xres < 4) {
346 WRN_MSG("X resolution too small (%d vs 4).\n", var->xres);
347 return 1;
348 }
349 if (var->yres < 4) {
350 WRN_MSG("Y resolution too small (%d vs 4).\n", var->yres);
351 return 1;
352 }
1da177e4 353
10b98368 354 /* Check for doublescan modes. */
1da177e4
LT		 355 if (var->vmode & FB_VMODE_DOUBLE) {
356 WRN_MSG("Mode is double-scan.\n");
357 return 1;
358 }
359
28ebe4f6
KH		 360 if ((var->vmode & FB_VMODE_INTERLACED) && (var->yres & 1)) {
361 WRN_MSG("Odd number of lines in interlaced mode\n");
362 return 1;
363 }
364
1da177e4
LT		 365 /* Check if clock is OK. */
366 tmp = 1000000000 / var->pixclock;
367 if (tmp < MIN_CLOCK) {
368 WRN_MSG("Pixel clock is too low (%d MHz vs %d MHz).\n",
369 (tmp + 500) / 1000, MIN_CLOCK / 1000);
370 return 1;
371 }
372 if (tmp > MAX_CLOCK) {
373 WRN_MSG("Pixel clock is too high (%d MHz vs %d MHz).\n",
374 (tmp + 500) / 1000, MAX_CLOCK / 1000);
375 return 1;
376 }
377
378 return 0;
379}
380
689c9568 381int intelfbhw_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
1da177e4
LT		 382{
383 struct intelfb_info *dinfo = GET_DINFO(info);
384 u32 offset, xoffset, yoffset;
385
386#if VERBOSE > 0
387 DBG_MSG("intelfbhw_pan_display\n");
388#endif
389
390 xoffset = ROUND_DOWN_TO(var->xoffset, 8);
391 yoffset = var->yoffset;
392
f5b9cc6a
LP		 393 if ((xoffset + info->var.xres > info->var.xres_virtual) ||
394 (yoffset + info->var.yres > info->var.yres_virtual))
1da177e4
LT		 395 return -EINVAL;
396
397 offset = (yoffset * dinfo->pitch) +
f5b9cc6a 398 (xoffset * info->var.bits_per_pixel) / 8;
1da177e4
LT		 399
400 offset += dinfo->fb.offset << 12;
401
f80d0d23 402 dinfo->vsync.pan_offset = offset;
689c9568 403 if ((var->activate & FB_ACTIVATE_VBL) &&
394d3af7 404 !intelfbhw_enable_irq(dinfo))
f80d0d23 405 dinfo->vsync.pan_display = 1;
689c9568 406 else {
f80d0d23
EH		 407 dinfo->vsync.pan_display = 0;
408 OUTREG(DSPABASE, offset);
409 }
1da177e4
LT		 410
411 return 0;
412}
413
414/* Blank the screen. */
689c9568 415void intelfbhw_do_blank(int blank, struct fb_info *info)
1da177e4
LT		 416{
417 struct intelfb_info *dinfo = GET_DINFO(info);
418 u32 tmp;
419
420#if VERBOSE > 0
421 DBG_MSG("intelfbhw_do_blank: blank is %d\n", blank);
422#endif
423
424 /* Turn plane A on or off */
425 tmp = INREG(DSPACNTR);
426 if (blank)
427 tmp &= ~DISPPLANE_PLANE_ENABLE;
428 else
429 tmp |= DISPPLANE_PLANE_ENABLE;
430 OUTREG(DSPACNTR, tmp);
431 /* Flush */
432 tmp = INREG(DSPABASE);
433 OUTREG(DSPABASE, tmp);
434
435 /* Turn off/on the HW cursor */
436#if VERBOSE > 0
437 DBG_MSG("cursor_on is %d\n", dinfo->cursor_on);
438#endif
439 if (dinfo->cursor_on) {
689c9568 440 if (blank)
1da177e4 441 intelfbhw_cursor_hide(dinfo);
689c9568 442 else
1da177e4 443 intelfbhw_cursor_show(dinfo);
1da177e4
LT		 444 dinfo->cursor_on = 1;
445 }
446 dinfo->cursor_blanked = blank;
447
448 /* Set DPMS level */
449 tmp = INREG(ADPA) & ~ADPA_DPMS_CONTROL_MASK;
450 switch (blank) {
451 case FB_BLANK_UNBLANK:
452 case FB_BLANK_NORMAL:
453 tmp |= ADPA_DPMS_D0;
454 break;
455 case FB_BLANK_VSYNC_SUSPEND:
456 tmp |= ADPA_DPMS_D1;
457 break;
458 case FB_BLANK_HSYNC_SUSPEND:
459 tmp |= ADPA_DPMS_D2;
460 break;
461 case FB_BLANK_POWERDOWN:
462 tmp |= ADPA_DPMS_D3;
463 break;
464 }
465 OUTREG(ADPA, tmp);
466
467 return;
468}
469
470
cfbd646f
KH		 471/* Check which pipe is connected to an active display plane. */
472int intelfbhw_active_pipe(const struct intelfb_hwstate *hw)
473{
474 int pipe = -1;
475
476 /* keep old default behaviour - prefer PIPE_A */
477 if (hw->disp_b_ctrl & DISPPLANE_PLANE_ENABLE) {
478 pipe = (hw->disp_b_ctrl >> DISPPLANE_SEL_PIPE_SHIFT);
479 pipe &= PIPE_MASK;
480 if (unlikely(pipe == PIPE_A))
481 return PIPE_A;
482 }
483 if (hw->disp_a_ctrl & DISPPLANE_PLANE_ENABLE) {
484 pipe = (hw->disp_a_ctrl >> DISPPLANE_SEL_PIPE_SHIFT);
485 pipe &= PIPE_MASK;
486 if (likely(pipe == PIPE_A))
487 return PIPE_A;
488 }
489 /* Impossible that no pipe is selected - return PIPE_A */
490 WARN_ON(pipe == -1);
491 if (unlikely(pipe == -1))
492 pipe = PIPE_A;
493
494 return pipe;
495}
496
689c9568
KH		 497void intelfbhw_setcolreg(struct intelfb_info *dinfo, unsigned regno,
498 unsigned red, unsigned green, unsigned blue,
499 unsigned transp)
1da177e4 500{
ee5618f4
KH		 501 u32 palette_reg = (dinfo->pipe == PIPE_A) ?
502 PALETTE_A : PALETTE_B;
503
1da177e4
LT		 504#if VERBOSE > 0
505 DBG_MSG("intelfbhw_setcolreg: %d: (%d, %d, %d)\n",
506 regno, red, green, blue);
507#endif
508
1da177e4
LT		 509 OUTREG(palette_reg + (regno << 2),
510 (red << PALETTE_8_RED_SHIFT) |
511 (green << PALETTE_8_GREEN_SHIFT) |
512 (blue << PALETTE_8_BLUE_SHIFT));
513}
514
515
689c9568
KH		 516int intelfbhw_read_hw_state(struct intelfb_info *dinfo,
517 struct intelfb_hwstate *hw, int flag)
1da177e4
LT		 518{
519 int i;
520
521#if VERBOSE > 0
522 DBG_MSG("intelfbhw_read_hw_state\n");
523#endif
524
525 if (!hw || !dinfo)
526 return -1;
527
528 /* Read in as much of the HW state as possible. */
529 hw->vga0_divisor = INREG(VGA0_DIVISOR);
530 hw->vga1_divisor = INREG(VGA1_DIVISOR);
531 hw->vga_pd = INREG(VGAPD);
532 hw->dpll_a = INREG(DPLL_A);
533 hw->dpll_b = INREG(DPLL_B);
534 hw->fpa0 = INREG(FPA0);
535 hw->fpa1 = INREG(FPA1);
536 hw->fpb0 = INREG(FPB0);
537 hw->fpb1 = INREG(FPB1);
538
539 if (flag == 1)
540 return flag;
541
542#if 0
543 /* This seems to be a problem with the 852GM/855GM */
544 for (i = 0; i < PALETTE_8_ENTRIES; i++) {
545 hw->palette_a[i] = INREG(PALETTE_A + (i << 2));
546 hw->palette_b[i] = INREG(PALETTE_B + (i << 2));
547 }
548#endif
549
550 if (flag == 2)
551 return flag;
552
553 hw->htotal_a = INREG(HTOTAL_A);
554 hw->hblank_a = INREG(HBLANK_A);
555 hw->hsync_a = INREG(HSYNC_A);
556 hw->vtotal_a = INREG(VTOTAL_A);
557 hw->vblank_a = INREG(VBLANK_A);
558 hw->vsync_a = INREG(VSYNC_A);
559 hw->src_size_a = INREG(SRC_SIZE_A);
560 hw->bclrpat_a = INREG(BCLRPAT_A);
561 hw->htotal_b = INREG(HTOTAL_B);
562 hw->hblank_b = INREG(HBLANK_B);
563 hw->hsync_b = INREG(HSYNC_B);
564 hw->vtotal_b = INREG(VTOTAL_B);
565 hw->vblank_b = INREG(VBLANK_B);
566 hw->vsync_b = INREG(VSYNC_B);
567 hw->src_size_b = INREG(SRC_SIZE_B);
568 hw->bclrpat_b = INREG(BCLRPAT_B);
569
570 if (flag == 3)
571 return flag;
572
573 hw->adpa = INREG(ADPA);
574 hw->dvoa = INREG(DVOA);
575 hw->dvob = INREG(DVOB);
576 hw->dvoc = INREG(DVOC);
577 hw->dvoa_srcdim = INREG(DVOA_SRCDIM);
578 hw->dvob_srcdim = INREG(DVOB_SRCDIM);
579 hw->dvoc_srcdim = INREG(DVOC_SRCDIM);
580 hw->lvds = INREG(LVDS);
581
582 if (flag == 4)
583 return flag;
584
585 hw->pipe_a_conf = INREG(PIPEACONF);
586 hw->pipe_b_conf = INREG(PIPEBCONF);
587 hw->disp_arb = INREG(DISPARB);
588
589 if (flag == 5)
590 return flag;
591
592 hw->cursor_a_control = INREG(CURSOR_A_CONTROL);
593 hw->cursor_b_control = INREG(CURSOR_B_CONTROL);
594 hw->cursor_a_base = INREG(CURSOR_A_BASEADDR);
595 hw->cursor_b_base = INREG(CURSOR_B_BASEADDR);
596
597 if (flag == 6)
598 return flag;
599
600 for (i = 0; i < 4; i++) {
601 hw->cursor_a_palette[i] = INREG(CURSOR_A_PALETTE0 + (i << 2));
602 hw->cursor_b_palette[i] = INREG(CURSOR_B_PALETTE0 + (i << 2));
603 }
604
605 if (flag == 7)
606 return flag;
607
608 hw->cursor_size = INREG(CURSOR_SIZE);
609
610 if (flag == 8)
611 return flag;
612
613 hw->disp_a_ctrl = INREG(DSPACNTR);
614 hw->disp_b_ctrl = INREG(DSPBCNTR);
615 hw->disp_a_base = INREG(DSPABASE);
616 hw->disp_b_base = INREG(DSPBBASE);
617 hw->disp_a_stride = INREG(DSPASTRIDE);
618 hw->disp_b_stride = INREG(DSPBSTRIDE);
619
620 if (flag == 9)
621 return flag;
622
623 hw->vgacntrl = INREG(VGACNTRL);
624
625 if (flag == 10)
626 return flag;
627
628 hw->add_id = INREG(ADD_ID);
629
630 if (flag == 11)
631 return flag;
632
633 for (i = 0; i < 7; i++) {
634 hw->swf0x[i] = INREG(SWF00 + (i << 2));
635 hw->swf1x[i] = INREG(SWF10 + (i << 2));
636 if (i < 3)
637 hw->swf3x[i] = INREG(SWF30 + (i << 2));
638 }
639
640 for (i = 0; i < 8; i++)
641 hw->fence[i] = INREG(FENCE + (i << 2));
642
643 hw->instpm = INREG(INSTPM);
644 hw->mem_mode = INREG(MEM_MODE);
645 hw->fw_blc_0 = INREG(FW_BLC_0);
646 hw->fw_blc_1 = INREG(FW_BLC_1);
647
9a5f019b
EH		 648 hw->hwstam = INREG16(HWSTAM);
649 hw->ier = INREG16(IER);
650 hw->iir = INREG16(IIR);
651 hw->imr = INREG16(IMR);
652
1da177e4
LT		 653 return 0;
654}
655
656
d024960c
DA		 657static int calc_vclock3(int index, int m, int n, int p)
658{
7679f4d6
DA		 659 if (p == 0 || n == 0)
660 return 0;
3aff13cf 661 return plls[index].ref_clk * m / n / p;
d024960c 662}
8b91b0b4 663
689c9568
KH		 664static int calc_vclock(int index, int m1, int m2, int n, int p1, int p2,
665 int lvds)
d024960c 666{
c9daa873
DA		 667 struct pll_min_max *pll = &plls[index];
668 u32 m, vco, p;
669
670 m = (5 * (m1 + 2)) + (m2 + 2);
671 n += 2;
672 vco = pll->ref_clk * m / n;
673
689c9568 674 if (index == PLLS_I8xx)
c9daa873 675 p = ((p1 + 2) * (1 << (p2 + 1)));
689c9568 676 else
c9daa873 677 p = ((p1) * (p2 ? 5 : 10));
c9daa873 678 return vco / p;
d024960c
DA		 679}
680
4dc3595f 681#if REGDUMP
689c9568
KH		 682static void intelfbhw_get_p1p2(struct intelfb_info *dinfo, int dpll,
683 int *o_p1, int *o_p2)
2abac1db
DA		 684{
685 int p1, p2;
686
687 if (IS_I9XX(dinfo)) {
688 if (dpll & DPLL_P1_FORCE_DIV2)
689 p1 = 1;
690 else
691 p1 = (dpll >> DPLL_P1_SHIFT) & 0xff;
689c9568 692
2abac1db
DA		 693 p1 = ffs(p1);
694
695 p2 = (dpll >> DPLL_I9XX_P2_SHIFT) & DPLL_P2_MASK;
696 } else {
697 if (dpll & DPLL_P1_FORCE_DIV2)
698 p1 = 0;
699 else
700 p1 = (dpll >> DPLL_P1_SHIFT) & DPLL_P1_MASK;
701 p2 = (dpll >> DPLL_P2_SHIFT) & DPLL_P2_MASK;
702 }
703
704 *o_p1 = p1;
705 *o_p2 = p2;
706}
4dc3595f 707#endif
2abac1db
DA		 708
709
689c9568
KH		 710void intelfbhw_print_hw_state(struct intelfb_info *dinfo,
711 struct intelfb_hwstate *hw)
1da177e4
LT		 712{
713#if REGDUMP
714 int i, m1, m2, n, p1, p2;
d024960c 715 int index = dinfo->pll_index;
1da177e4 716 DBG_MSG("intelfbhw_print_hw_state\n");
3aff13cf 717
f84fcb06 718 if (!hw)
1da177e4
LT		 719 return;
720 /* Read in as much of the HW state as possible. */
721 printk("hw state dump start\n");
722 printk(" VGA0_DIVISOR: 0x%08x\n", hw->vga0_divisor);
723 printk(" VGA1_DIVISOR: 0x%08x\n", hw->vga1_divisor);
689c9568 724 printk(" VGAPD: 0x%08x\n", hw->vga_pd);
1da177e4
LT		 725 n = (hw->vga0_divisor >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
726 m1 = (hw->vga0_divisor >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
727 m2 = (hw->vga0_divisor >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
3aff13cf 728
2abac1db 729 intelfbhw_get_p1p2(dinfo, hw->vga_pd, &p1, &p2);
3aff13cf 730
1da177e4 731 printk(" VGA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
d024960c 732 m1, m2, n, p1, p2);
8b91b0b4 733 printk(" VGA0: clock is %d\n",
3aff13cf
DA		 734 calc_vclock(index, m1, m2, n, p1, p2, 0));
735
1da177e4
LT		 736 n = (hw->vga1_divisor >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
737 m1 = (hw->vga1_divisor >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
738 m2 = (hw->vga1_divisor >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
2abac1db
DA		 739
740 intelfbhw_get_p1p2(dinfo, hw->vga_pd, &p1, &p2);
1da177e4 741 printk(" VGA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
d024960c 742 m1, m2, n, p1, p2);
689c9568
KH		 743 printk(" VGA1: clock is %d\n",
744 calc_vclock(index, m1, m2, n, p1, p2, 0));
3aff13cf 745
1da177e4
LT		 746 printk(" DPLL_A: 0x%08x\n", hw->dpll_a);
747 printk(" DPLL_B: 0x%08x\n", hw->dpll_b);
748 printk(" FPA0: 0x%08x\n", hw->fpa0);
749 printk(" FPA1: 0x%08x\n", hw->fpa1);
750 printk(" FPB0: 0x%08x\n", hw->fpb0);
751 printk(" FPB1: 0x%08x\n", hw->fpb1);
3aff13cf 752
1da177e4
LT		 753 n = (hw->fpa0 >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
754 m1 = (hw->fpa0 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
755 m2 = (hw->fpa0 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
3aff13cf 756
2abac1db 757 intelfbhw_get_p1p2(dinfo, hw->dpll_a, &p1, &p2);
3aff13cf 758
1da177e4 759 printk(" PLLA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
d024960c 760 m1, m2, n, p1, p2);
689c9568
KH		 761 printk(" PLLA0: clock is %d\n",
762 calc_vclock(index, m1, m2, n, p1, p2, 0));
3aff13cf 763
1da177e4
LT		 764 n = (hw->fpa1 >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
765 m1 = (hw->fpa1 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
766 m2 = (hw->fpa1 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
3aff13cf 767
2abac1db 768 intelfbhw_get_p1p2(dinfo, hw->dpll_a, &p1, &p2);
3aff13cf 769
1da177e4 770 printk(" PLLA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
d024960c 771 m1, m2, n, p1, p2);
689c9568
KH		 772 printk(" PLLA1: clock is %d\n",
773 calc_vclock(index, m1, m2, n, p1, p2, 0));
3aff13cf 774
1da177e4
LT		 775#if 0
776 printk(" PALETTE_A:\n");
777 for (i = 0; i < PALETTE_8_ENTRIES)
d024960c 778 printk(" %3d: 0x%08x\n", i, hw->palette_a[i]);
1da177e4
LT		 779 printk(" PALETTE_B:\n");
780 for (i = 0; i < PALETTE_8_ENTRIES)
d024960c 781 printk(" %3d: 0x%08x\n", i, hw->palette_b[i]);
1da177e4
LT		 782#endif
783
784 printk(" HTOTAL_A: 0x%08x\n", hw->htotal_a);
785 printk(" HBLANK_A: 0x%08x\n", hw->hblank_a);
786 printk(" HSYNC_A: 0x%08x\n", hw->hsync_a);
787 printk(" VTOTAL_A: 0x%08x\n", hw->vtotal_a);
788 printk(" VBLANK_A: 0x%08x\n", hw->vblank_a);
789 printk(" VSYNC_A: 0x%08x\n", hw->vsync_a);
790 printk(" SRC_SIZE_A: 0x%08x\n", hw->src_size_a);
791 printk(" BCLRPAT_A: 0x%08x\n", hw->bclrpat_a);
792 printk(" HTOTAL_B: 0x%08x\n", hw->htotal_b);
793 printk(" HBLANK_B: 0x%08x\n", hw->hblank_b);
794 printk(" HSYNC_B: 0x%08x\n", hw->hsync_b);
795 printk(" VTOTAL_B: 0x%08x\n", hw->vtotal_b);
796 printk(" VBLANK_B: 0x%08x\n", hw->vblank_b);
797 printk(" VSYNC_B: 0x%08x\n", hw->vsync_b);
798 printk(" SRC_SIZE_B: 0x%08x\n", hw->src_size_b);
799 printk(" BCLRPAT_B: 0x%08x\n", hw->bclrpat_b);
800
801 printk(" ADPA: 0x%08x\n", hw->adpa);
802 printk(" DVOA: 0x%08x\n", hw->dvoa);
803 printk(" DVOB: 0x%08x\n", hw->dvob);
804 printk(" DVOC: 0x%08x\n", hw->dvoc);
805 printk(" DVOA_SRCDIM: 0x%08x\n", hw->dvoa_srcdim);
806 printk(" DVOB_SRCDIM: 0x%08x\n", hw->dvob_srcdim);
807 printk(" DVOC_SRCDIM: 0x%08x\n", hw->dvoc_srcdim);
808 printk(" LVDS: 0x%08x\n", hw->lvds);
809
810 printk(" PIPEACONF: 0x%08x\n", hw->pipe_a_conf);
811 printk(" PIPEBCONF: 0x%08x\n", hw->pipe_b_conf);
812 printk(" DISPARB: 0x%08x\n", hw->disp_arb);
813
814 printk(" CURSOR_A_CONTROL: 0x%08x\n", hw->cursor_a_control);
815 printk(" CURSOR_B_CONTROL: 0x%08x\n", hw->cursor_b_control);
816 printk(" CURSOR_A_BASEADDR: 0x%08x\n", hw->cursor_a_base);
817 printk(" CURSOR_B_BASEADDR: 0x%08x\n", hw->cursor_b_base);
818
819 printk(" CURSOR_A_PALETTE: ");
820 for (i = 0; i < 4; i++) {
821 printk("0x%08x", hw->cursor_a_palette[i]);
822 if (i < 3)
823 printk(", ");
824 }
825 printk("\n");
826 printk(" CURSOR_B_PALETTE: ");
827 for (i = 0; i < 4; i++) {
828 printk("0x%08x", hw->cursor_b_palette[i]);
829 if (i < 3)
830 printk(", ");
831 }
832 printk("\n");
833
834 printk(" CURSOR_SIZE: 0x%08x\n", hw->cursor_size);
835
836 printk(" DSPACNTR: 0x%08x\n", hw->disp_a_ctrl);
837 printk(" DSPBCNTR: 0x%08x\n", hw->disp_b_ctrl);
838 printk(" DSPABASE: 0x%08x\n", hw->disp_a_base);
839 printk(" DSPBBASE: 0x%08x\n", hw->disp_b_base);
840 printk(" DSPASTRIDE: 0x%08x\n", hw->disp_a_stride);
841 printk(" DSPBSTRIDE: 0x%08x\n", hw->disp_b_stride);
842
843 printk(" VGACNTRL: 0x%08x\n", hw->vgacntrl);
844 printk(" ADD_ID: 0x%08x\n", hw->add_id);
845
846 for (i = 0; i < 7; i++) {
847 printk(" SWF0%d 0x%08x\n", i,
848 hw->swf0x[i]);
849 }
850 for (i = 0; i < 7; i++) {
851 printk(" SWF1%d 0x%08x\n", i,
852 hw->swf1x[i]);
853 }
854 for (i = 0; i < 3; i++) {
855 printk(" SWF3%d 0x%08x\n", i,
d024960c 856 hw->swf3x[i]);
1da177e4
LT		 857 }
858 for (i = 0; i < 8; i++)
859 printk(" FENCE%d 0x%08x\n", i,
d024960c 860 hw->fence[i]);
8b91b0b4 861
1da177e4
LT		 862 printk(" INSTPM 0x%08x\n", hw->instpm);
863 printk(" MEM_MODE 0x%08x\n", hw->mem_mode);
864 printk(" FW_BLC_0 0x%08x\n", hw->fw_blc_0);
865 printk(" FW_BLC_1 0x%08x\n", hw->fw_blc_1);
866
9a5f019b
EH		 867 printk(" HWSTAM 0x%04x\n", hw->hwstam);
868 printk(" IER 0x%04x\n", hw->ier);
869 printk(" IIR 0x%04x\n", hw->iir);
870 printk(" IMR 0x%04x\n", hw->imr);
1da177e4
LT		 871 printk("hw state dump end\n");
872#endif
873}
874
8b91b0b4 875
d024960c 876
1da177e4 877/* Split the M parameter into M1 and M2. */
689c9568
KH		 878static int splitm(int index, unsigned int m, unsigned int *retm1,
879 unsigned int *retm2)
1da177e4
LT		 880{
881 int m1, m2;
8492f081 882 int testm;
c9daa873
DA		 883 struct pll_min_max *pll = &plls[index];
884
8492f081 885 /* no point optimising too much - brute force m */
c9daa873
DA		 886 for (m1 = pll->min_m1; m1 < pll->max_m1 + 1; m1++) {
887 for (m2 = pll->min_m2; m2 < pll->max_m2 + 1; m2++) {
3aff13cf 888 testm = (5 * (m1 + 2)) + (m2 + 2);
8b91b0b4
DA		 889 if (testm == m) {
890 *retm1 = (unsigned int)m1;
891 *retm2 = (unsigned int)m2;
892 return 0;
893 }
894 }
1da177e4 895 }
8492f081 896 return 1;
1da177e4
LT		 897}
898
899/* Split the P parameter into P1 and P2. */
689c9568
KH		 900static int splitp(int index, unsigned int p, unsigned int *retp1,
901 unsigned int *retp2)
1da177e4
LT		 902{
903 int p1, p2;
c9daa873 904 struct pll_min_max *pll = &plls[index];
1da177e4 905
8b91b0b4 906 if (index == PLLS_I9xx) {
51d79747 907 p2 = (p % 10) ? 1 : 0;
3aff13cf
DA		 908
909 p1 = p / (p2 ? 5 : 10);
910
d024960c
DA		 911 *retp1 = (unsigned int)p1;
912 *retp2 = (unsigned int)p2;
913 return 0;
914 }
915
c9daa873
DA		 916 if (p % 4 == 0)
917 p2 = 1;
918 else
919 p2 = 0;
920 p1 = (p / (1 << (p2 + 1))) - 2;
921 if (p % 4 == 0 && p1 < pll->min_p1) {
922 p2 = 0;
1da177e4
LT		 923 p1 = (p / (1 << (p2 + 1))) - 2;
924 }
c9daa873
DA		 925 if (p1 < pll->min_p1 || p1 > pll->max_p1 ||
926 (p1 + 2) * (1 << (p2 + 1)) != p) {
927 return 1;
928 } else {
929 *retp1 = (unsigned int)p1;
930 *retp2 = (unsigned int)p2;
931 return 0;
932 }
1da177e4
LT		 933}
934
689c9568
KH		 935static int calc_pll_params(int index, int clock, u32 *retm1, u32 *retm2,
936 u32 *retn, u32 *retp1, u32 *retp2, u32 *retclock)
1da177e4 937{
7679f4d6
DA		 938 u32 m1, m2, n, p1, p2, n1, testm;
939 u32 f_vco, p, p_best = 0, m, f_out = 0;
3725369f
CIK		 940 u32 err_best = 10000000;
941 u32 n_best = 0, m_best = 0, f_err;
51d79747
DA		 942 u32 p_min, p_max, p_inc, div_max;
943 struct pll_min_max *pll = &plls[index];
1da177e4 944
1da177e4
LT		 945 DBG_MSG("Clock is %d\n", clock);
946
51d79747 947 div_max = pll->max_vco / clock;
1da177e4 948
51d79747
DA		 949 p_inc = (clock <= pll->p_transition_clk) ? pll->p_inc_lo : pll->p_inc_hi;
950 p_min = p_inc;
1da177e4 951 p_max = ROUND_DOWN_TO(div_max, p_inc);
51d79747
DA		 952 if (p_min < pll->min_p)
953 p_min = pll->min_p;
954 if (p_max > pll->max_p)
955 p_max = pll->max_p;
1da177e4
LT		 956
957 DBG_MSG("p range is %d-%d (%d)\n", p_min, p_max, p_inc);
958
959 p = p_min;
960 do {
7258b11d 961 if (splitp(index, p, &p1, &p2)) {
1da177e4
LT		 962 WRN_MSG("cannot split p = %d\n", p);
963 p += p_inc;
964 continue;
965 }
51d79747 966 n = pll->min_n;
1da177e4
LT		 967 f_vco = clock * p;
968
969 do {
51d79747
DA		 970 m = ROUND_UP_TO(f_vco * n, pll->ref_clk) / pll->ref_clk;
971 if (m < pll->min_m)
972 m = pll->min_m + 1;
973 if (m > pll->max_m)
974 m = pll->max_m - 1;
7679f4d6 975 for (testm = m - 1; testm <= m; testm++) {
9c54ea95 976 f_out = calc_vclock3(index, testm, n, p);
c9daa873 977 if (splitm(index, testm, &m1, &m2)) {
9c54ea95
KH		 978 WRN_MSG("cannot split m = %d\n",
979 testm);
7679f4d6
DA		 980 continue;
981 }
982 if (clock > f_out)
983 f_err = clock - f_out;
984 else/* slightly bias the error for bigger clocks */
985 f_err = f_out - clock + 1;
3aff13cf 986
7679f4d6 987 if (f_err < err_best) {
c9daa873 988 m_best = testm;
7679f4d6
DA		 989 n_best = n;
990 p_best = p;
7679f4d6
DA		 991 err_best = f_err;
992 }
1da177e4
LT		 993 }
994 n++;
51d79747 995 } while ((n <= pll->max_n) && (f_out >= clock));
1da177e4
LT		 996 p += p_inc;
997 } while ((p <= p_max));
998
999 if (!m_best) {
1000 WRN_MSG("cannot find parameters for clock %d\n", clock);
1001 return 1;
1002 }
1003 m = m_best;
1004 n = n_best;
1005 p = p_best;
7258b11d
DA		 1006 splitm(index, m, &m1, &m2);
1007 splitp(index, p, &p1, &p2);
1da177e4
LT		 1008 n1 = n - 2;
1009
1010 DBG_MSG("m, n, p: %d (%d,%d), %d (%d), %d (%d,%d), "
1011 "f: %d (%d), VCO: %d\n",
1012 m, m1, m2, n, n1, p, p1, p2,
8b91b0b4 1013 calc_vclock3(index, m, n, p),
3aff13cf 1014 calc_vclock(index, m1, m2, n1, p1, p2, 0),
d024960c 1015 calc_vclock3(index, m, n, p) * p);
1da177e4
LT		 1016 *retm1 = m1;
1017 *retm2 = m2;
1018 *retn = n1;
1019 *retp1 = p1;
1020 *retp2 = p2;
3aff13cf 1021 *retclock = calc_vclock(index, m1, m2, n1, p1, p2, 0);
1da177e4
LT		 1022
1023 return 0;
1024}
1025
689c9568
KH		 1026static __inline__ int check_overflow(u32 value, u32 limit,
1027 const char *description)
1da177e4
LT		 1028{
1029 if (value > limit) {
1030 WRN_MSG("%s value %d exceeds limit %d\n",
1031 description, value, limit);
1032 return 1;
1033 }
1034 return 0;
1035}
1036
1037/* It is assumed that hw is filled in with the initial state information. */
689c9568
KH		 1038int intelfbhw_mode_to_hw(struct intelfb_info *dinfo,
1039 struct intelfb_hwstate *hw,
1040 struct fb_var_screeninfo *var)
1da177e4 1041{
cfbd646f 1042 int pipe = intelfbhw_active_pipe(hw);
1da177e4
LT		 1043 u32 *dpll, *fp0, *fp1;
1044 u32 m1, m2, n, p1, p2, clock_target, clock;
1045 u32 hsync_start, hsync_end, hblank_start, hblank_end, htotal, hactive;
1046 u32 vsync_start, vsync_end, vblank_start, vblank_end, vtotal, vactive;
1047 u32 vsync_pol, hsync_pol;
1048 u32 *vs, *vb, *vt, *hs, *hb, *ht, *ss, *pipe_conf;
df7df8ab 1049 u32 stride_alignment;
1da177e4
LT		 1050
1051 DBG_MSG("intelfbhw_mode_to_hw\n");
1052
1053 /* Disable VGA */
1054 hw->vgacntrl |= VGA_DISABLE;
1055
1da177e4
LT		 1056 /* Set which pipe's registers will be set. */
1057 if (pipe == PIPE_B) {
1058 dpll = &hw->dpll_b;
1059 fp0 = &hw->fpb0;
1060 fp1 = &hw->fpb1;
1061 hs = &hw->hsync_b;
1062 hb = &hw->hblank_b;
1063 ht = &hw->htotal_b;
1064 vs = &hw->vsync_b;
1065 vb = &hw->vblank_b;
1066 vt = &hw->vtotal_b;
1067 ss = &hw->src_size_b;
1068 pipe_conf = &hw->pipe_b_conf;
1069 } else {
1070 dpll = &hw->dpll_a;
1071 fp0 = &hw->fpa0;
1072 fp1 = &hw->fpa1;
1073 hs = &hw->hsync_a;
1074 hb = &hw->hblank_a;
1075 ht = &hw->htotal_a;
1076 vs = &hw->vsync_a;
1077 vb = &hw->vblank_a;
1078 vt = &hw->vtotal_a;
1079 ss = &hw->src_size_a;
1080 pipe_conf = &hw->pipe_a_conf;
1081 }
1082
1083 /* Use ADPA register for sync control. */
1084 hw->adpa &= ~ADPA_USE_VGA_HVPOLARITY;
1085
1086 /* sync polarity */
1087 hsync_pol = (var->sync & FB_SYNC_HOR_HIGH_ACT) ?
1088 ADPA_SYNC_ACTIVE_HIGH : ADPA_SYNC_ACTIVE_LOW;
1089 vsync_pol = (var->sync & FB_SYNC_VERT_HIGH_ACT) ?
1090 ADPA_SYNC_ACTIVE_HIGH : ADPA_SYNC_ACTIVE_LOW;
1091 hw->adpa &= ~((ADPA_SYNC_ACTIVE_MASK << ADPA_VSYNC_ACTIVE_SHIFT) |
1092 (ADPA_SYNC_ACTIVE_MASK << ADPA_HSYNC_ACTIVE_SHIFT));
1093 hw->adpa |= (hsync_pol << ADPA_HSYNC_ACTIVE_SHIFT) |
1094 (vsync_pol << ADPA_VSYNC_ACTIVE_SHIFT);
1095
1096 /* Connect correct pipe to the analog port DAC */
1097 hw->adpa &= ~(PIPE_MASK << ADPA_PIPE_SELECT_SHIFT);
1098 hw->adpa |= (pipe << ADPA_PIPE_SELECT_SHIFT);
1099
1100 /* Set DPMS state to D0 (on) */
1101 hw->adpa &= ~ADPA_DPMS_CONTROL_MASK;
1102 hw->adpa |= ADPA_DPMS_D0;
1103
1104 hw->adpa |= ADPA_DAC_ENABLE;
1105
1106 *dpll |= (DPLL_VCO_ENABLE | DPLL_VGA_MODE_DISABLE);
1107 *dpll &= ~(DPLL_RATE_SELECT_MASK | DPLL_REFERENCE_SELECT_MASK);
1108 *dpll |= (DPLL_REFERENCE_DEFAULT | DPLL_RATE_SELECT_FP0);
1109
1110 /* Desired clock in kHz */
1111 clock_target = 1000000000 / var->pixclock;
1112
3aff13cf 1113 if (calc_pll_params(dinfo->pll_index, clock_target, &m1, &m2,
8b91b0b4 1114 &n, &p1, &p2, &clock)) {
1da177e4
LT		 1115 WRN_MSG("calc_pll_params failed\n");
1116 return 1;
1117 }
1118
1119 /* Check for overflow. */
1120 if (check_overflow(p1, DPLL_P1_MASK, "PLL P1 parameter"))
1121 return 1;
1122 if (check_overflow(p2, DPLL_P2_MASK, "PLL P2 parameter"))
1123 return 1;
1124 if (check_overflow(m1, FP_DIVISOR_MASK, "PLL M1 parameter"))
1125 return 1;
1126 if (check_overflow(m2, FP_DIVISOR_MASK, "PLL M2 parameter"))
1127 return 1;
1128 if (check_overflow(n, FP_DIVISOR_MASK, "PLL N parameter"))
1129 return 1;
1130
1131 *dpll &= ~DPLL_P1_FORCE_DIV2;
1132 *dpll &= ~((DPLL_P2_MASK << DPLL_P2_SHIFT) |
1133 (DPLL_P1_MASK << DPLL_P1_SHIFT));
3aff13cf
DA		 1134
1135 if (IS_I9XX(dinfo)) {
1136 *dpll |= (p2 << DPLL_I9XX_P2_SHIFT);
1137 *dpll |= (1 << (p1 - 1)) << DPLL_P1_SHIFT;
689c9568 1138 } else
3aff13cf 1139 *dpll |= (p2 << DPLL_P2_SHIFT) | (p1 << DPLL_P1_SHIFT);
3aff13cf 1140
1da177e4
LT		 1141 *fp0 = (n << FP_N_DIVISOR_SHIFT) |
1142 (m1 << FP_M1_DIVISOR_SHIFT) |
1143 (m2 << FP_M2_DIVISOR_SHIFT);
1144 *fp1 = *fp0;
1145
1146 hw->dvob &= ~PORT_ENABLE;
1147 hw->dvoc &= ~PORT_ENABLE;
1148
1149 /* Use display plane A. */
1150 hw->disp_a_ctrl |= DISPPLANE_PLANE_ENABLE;
1151 hw->disp_a_ctrl &= ~DISPPLANE_GAMMA_ENABLE;
1152 hw->disp_a_ctrl &= ~DISPPLANE_PIXFORMAT_MASK;
1153 switch (intelfb_var_to_depth(var)) {
1154 case 8:
1155 hw->disp_a_ctrl |= DISPPLANE_8BPP | DISPPLANE_GAMMA_ENABLE;
1156 break;
1157 case 15:
1158 hw->disp_a_ctrl |= DISPPLANE_15_16BPP;
1159 break;
1160 case 16:
1161 hw->disp_a_ctrl |= DISPPLANE_16BPP;
1162 break;
1163 case 24:
1164 hw->disp_a_ctrl |= DISPPLANE_32BPP_NO_ALPHA;
1165 break;
1166 }
1167 hw->disp_a_ctrl &= ~(PIPE_MASK << DISPPLANE_SEL_PIPE_SHIFT);
1168 hw->disp_a_ctrl |= (pipe << DISPPLANE_SEL_PIPE_SHIFT);
1169
1170 /* Set CRTC registers. */
1171 hactive = var->xres;
1172 hsync_start = hactive + var->right_margin;
1173 hsync_end = hsync_start + var->hsync_len;
1174 htotal = hsync_end + var->left_margin;
1175 hblank_start = hactive;
1176 hblank_end = htotal;
1177
1178 DBG_MSG("H: act %d, ss %d, se %d, tot %d bs %d, be %d\n",
1179 hactive, hsync_start, hsync_end, htotal, hblank_start,
1180 hblank_end);
1181
1182 vactive = var->yres;
28ebe4f6
KH		 1183 if (var->vmode & FB_VMODE_INTERLACED)
1184 vactive--; /* the chip adds 2 halflines automatically */
1da177e4
LT		 1185 vsync_start = vactive + var->lower_margin;
1186 vsync_end = vsync_start + var->vsync_len;
1187 vtotal = vsync_end + var->upper_margin;
1188 vblank_start = vactive;
1da177e4
LT		 1189 vblank_end = vsync_end + 1;
1190
1191 DBG_MSG("V: act %d, ss %d, se %d, tot %d bs %d, be %d\n",
1192 vactive, vsync_start, vsync_end, vtotal, vblank_start,
1193 vblank_end);
1194
1195 /* Adjust for register values, and check for overflow. */
1196 hactive--;
1197 if (check_overflow(hactive, HACTIVE_MASK, "CRTC hactive"))
1198 return 1;
1199 hsync_start--;
1200 if (check_overflow(hsync_start, HSYNCSTART_MASK, "CRTC hsync_start"))
1201 return 1;
1202 hsync_end--;
1203 if (check_overflow(hsync_end, HSYNCEND_MASK, "CRTC hsync_end"))
1204 return 1;
1205 htotal--;
1206 if (check_overflow(htotal, HTOTAL_MASK, "CRTC htotal"))
1207 return 1;
1208 hblank_start--;
1209 if (check_overflow(hblank_start, HBLANKSTART_MASK, "CRTC hblank_start"))
1210 return 1;
1211 hblank_end--;
1212 if (check_overflow(hblank_end, HBLANKEND_MASK, "CRTC hblank_end"))
1213 return 1;
1214
1215 vactive--;
1216 if (check_overflow(vactive, VACTIVE_MASK, "CRTC vactive"))
1217 return 1;
1218 vsync_start--;
1219 if (check_overflow(vsync_start, VSYNCSTART_MASK, "CRTC vsync_start"))
1220 return 1;
1221 vsync_end--;
1222 if (check_overflow(vsync_end, VSYNCEND_MASK, "CRTC vsync_end"))
1223 return 1;
1224 vtotal--;
1225 if (check_overflow(vtotal, VTOTAL_MASK, "CRTC vtotal"))
1226 return 1;
1227 vblank_start--;
1228 if (check_overflow(vblank_start, VBLANKSTART_MASK, "CRTC vblank_start"))
1229 return 1;
1230 vblank_end--;
1231 if (check_overflow(vblank_end, VBLANKEND_MASK, "CRTC vblank_end"))
1232 return 1;
1233
1234 *ht = (htotal << HTOTAL_SHIFT) | (hactive << HACTIVE_SHIFT);
1235 *hb = (hblank_start << HBLANKSTART_SHIFT) |
1236 (hblank_end << HSYNCEND_SHIFT);
1237 *hs = (hsync_start << HSYNCSTART_SHIFT) | (hsync_end << HSYNCEND_SHIFT);
1238
1239 *vt = (vtotal << VTOTAL_SHIFT) | (vactive << VACTIVE_SHIFT);
1240 *vb = (vblank_start << VBLANKSTART_SHIFT) |
1241 (vblank_end << VSYNCEND_SHIFT);
1242 *vs = (vsync_start << VSYNCSTART_SHIFT) | (vsync_end << VSYNCEND_SHIFT);
1243 *ss = (hactive << SRC_SIZE_HORIZ_SHIFT) |
1244 (vactive << SRC_SIZE_VERT_SHIFT);
1245
3587c509 1246 hw->disp_a_stride = dinfo->pitch;
1da177e4
LT		 1247 DBG_MSG("pitch is %d\n", hw->disp_a_stride);
1248
1249 hw->disp_a_base = hw->disp_a_stride * var->yoffset +
1250 var->xoffset * var->bits_per_pixel / 8;
1251
1252 hw->disp_a_base += dinfo->fb.offset << 12;
1253
1254 /* Check stride alignment. */
df7df8ab
DM		 1255 stride_alignment = IS_I9XX(dinfo) ? STRIDE_ALIGNMENT_I9XX :
1256 STRIDE_ALIGNMENT;
1257 if (hw->disp_a_stride % stride_alignment != 0) {
1da177e4 1258 WRN_MSG("display stride %d has bad alignment %d\n",
df7df8ab 1259 hw->disp_a_stride, stride_alignment);
1da177e4
LT		 1260 return 1;
1261 }
1262
1263 /* Set the palette to 8-bit mode. */
1264 *pipe_conf &= ~PIPECONF_GAMMA;
10b98368
KH		 1265
1266 if (var->vmode & FB_VMODE_INTERLACED)
1267 *pipe_conf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
1268 else
1269 *pipe_conf &= ~PIPECONF_INTERLACE_MASK;
1270
1da177e4
LT		 1271 return 0;
1272}
1273
1274/* Program a (non-VGA) video mode. */
689c9568
KH		 1275int intelfbhw_program_mode(struct intelfb_info *dinfo,
1276 const struct intelfb_hwstate *hw, int blank)
1da177e4 1277{
1da177e4
LT		 1278 u32 tmp;
1279 const u32 *dpll, *fp0, *fp1, *pipe_conf;
1280 const u32 *hs, *ht, *hb, *vs, *vt, *vb, *ss;
394d3af7 1281 u32 dpll_reg, fp0_reg, fp1_reg, pipe_conf_reg, pipe_stat_reg;
1da177e4
LT		 1282 u32 hsync_reg, htotal_reg, hblank_reg;
1283 u32 vsync_reg, vtotal_reg, vblank_reg;
1284 u32 src_size_reg;
7679f4d6 1285 u32 count, tmp_val[3];
1da177e4 1286
cfbd646f 1287 /* Assume single pipe */
1da177e4
LT		 1288
1289#if VERBOSE > 0
1290 DBG_MSG("intelfbhw_program_mode\n");
1291#endif
1292
1293 /* Disable VGA */
1294 tmp = INREG(VGACNTRL);
1295 tmp |= VGA_DISABLE;
1296 OUTREG(VGACNTRL, tmp);
1297
cfbd646f 1298 dinfo->pipe = intelfbhw_active_pipe(hw);
1da177e4 1299
cfbd646f 1300 if (dinfo->pipe == PIPE_B) {
1da177e4
LT		 1301 dpll = &hw->dpll_b;
1302 fp0 = &hw->fpb0;
1303 fp1 = &hw->fpb1;
1304 pipe_conf = &hw->pipe_b_conf;
1305 hs = &hw->hsync_b;
1306 hb = &hw->hblank_b;
1307 ht = &hw->htotal_b;
1308 vs = &hw->vsync_b;
1309 vb = &hw->vblank_b;
1310 vt = &hw->vtotal_b;
1311 ss = &hw->src_size_b;
1312 dpll_reg = DPLL_B;
1313 fp0_reg = FPB0;
1314 fp1_reg = FPB1;
1315 pipe_conf_reg = PIPEBCONF;
394d3af7 1316 pipe_stat_reg = PIPEBSTAT;
1da177e4
LT		 1317 hsync_reg = HSYNC_B;
1318 htotal_reg = HTOTAL_B;
1319 hblank_reg = HBLANK_B;
1320 vsync_reg = VSYNC_B;
1321 vtotal_reg = VTOTAL_B;
1322 vblank_reg = VBLANK_B;
1323 src_size_reg = SRC_SIZE_B;
1324 } else {
1325 dpll = &hw->dpll_a;
1326 fp0 = &hw->fpa0;
1327 fp1 = &hw->fpa1;
1328 pipe_conf = &hw->pipe_a_conf;
1329 hs = &hw->hsync_a;
1330 hb = &hw->hblank_a;
1331 ht = &hw->htotal_a;
1332 vs = &hw->vsync_a;
1333 vb = &hw->vblank_a;
1334 vt = &hw->vtotal_a;
1335 ss = &hw->src_size_a;
1336 dpll_reg = DPLL_A;
1337 fp0_reg = FPA0;
1338 fp1_reg = FPA1;
1339 pipe_conf_reg = PIPEACONF;
394d3af7 1340 pipe_stat_reg = PIPEASTAT;
1da177e4
LT		 1341 hsync_reg = HSYNC_A;
1342 htotal_reg = HTOTAL_A;
1343 hblank_reg = HBLANK_A;
1344 vsync_reg = VSYNC_A;
1345 vtotal_reg = VTOTAL_A;
1346 vblank_reg = VBLANK_A;
1347 src_size_reg = SRC_SIZE_A;
1348 }
1349
7679f4d6
DA		 1350 /* turn off pipe */
1351 tmp = INREG(pipe_conf_reg);
1352 tmp &= ~PIPECONF_ENABLE;
1353 OUTREG(pipe_conf_reg, tmp);
3aff13cf 1354
7679f4d6 1355 count = 0;
8b91b0b4 1356 do {
ee5618f4
KH		 1357 tmp_val[count % 3] = INREG(PIPEA_DSL);
1358 if ((tmp_val[0] == tmp_val[1]) && (tmp_val[1] == tmp_val[2]))
3aff13cf
DA		 1359 break;
1360 count++;
1361 udelay(1);
1362 if (count % 200 == 0) {
1363 tmp = INREG(pipe_conf_reg);
1364 tmp &= ~PIPECONF_ENABLE;
1365 OUTREG(pipe_conf_reg, tmp);
1366 }
689c9568 1367 } while (count < 2000);
7679f4d6
DA		 1368
1369 OUTREG(ADPA, INREG(ADPA) & ~ADPA_DAC_ENABLE);
1370
1da177e4
LT		 1371 /* Disable planes A and B. */
1372 tmp = INREG(DSPACNTR);
1373 tmp &= ~DISPPLANE_PLANE_ENABLE;
1374 OUTREG(DSPACNTR, tmp);
1375 tmp = INREG(DSPBCNTR);
1376 tmp &= ~DISPPLANE_PLANE_ENABLE;
1377 OUTREG(DSPBCNTR, tmp);
1378
3aff13cf 1379 /* Wait for vblank. For now, just wait for a 50Hz cycle (20ms)) */
1da177e4
LT		 1380 mdelay(20);
1381
f728377f
DA		 1382 OUTREG(DVOB, INREG(DVOB) & ~PORT_ENABLE);
1383 OUTREG(DVOC, INREG(DVOC) & ~PORT_ENABLE);
1384 OUTREG(ADPA, INREG(ADPA) & ~ADPA_DAC_ENABLE);
1385
1da177e4
LT		 1386 /* Disable Sync */
1387 tmp = INREG(ADPA);
1388 tmp &= ~ADPA_DPMS_CONTROL_MASK;
1389 tmp |= ADPA_DPMS_D3;
1390 OUTREG(ADPA, tmp);
1391
7679f4d6
DA		 1392 /* do some funky magic - xyzzy */
1393 OUTREG(0x61204, 0xabcd0000);
1da177e4
LT		 1394
1395 /* turn off PLL */
1396 tmp = INREG(dpll_reg);
8c8bd037 1397 tmp &= ~DPLL_VCO_ENABLE;
1da177e4
LT		 1398 OUTREG(dpll_reg, tmp);
1399
1400 /* Set PLL parameters */
1da177e4
LT		 1401 OUTREG(fp0_reg, *fp0);
1402 OUTREG(fp1_reg, *fp1);
1403
7679f4d6 1404 /* Enable PLL */
f728377f 1405 OUTREG(dpll_reg, *dpll);
1da177e4
LT		 1406
1407 /* Set DVOs B/C */
1408 OUTREG(DVOB, hw->dvob);
1409 OUTREG(DVOC, hw->dvoc);
1410
7679f4d6
DA		 1411 /* undo funky magic */
1412 OUTREG(0x61204, 0x00000000);
1413
1da177e4 1414 /* Set ADPA */
7679f4d6 1415 OUTREG(ADPA, INREG(ADPA) | ADPA_DAC_ENABLE);
1da177e4
LT		 1416 OUTREG(ADPA, (hw->adpa & ~(ADPA_DPMS_CONTROL_MASK)) | ADPA_DPMS_D3);
1417
7679f4d6
DA		 1418 /* Set pipe parameters */
1419 OUTREG(hsync_reg, *hs);
1420 OUTREG(hblank_reg, *hb);
1421 OUTREG(htotal_reg, *ht);
1422 OUTREG(vsync_reg, *vs);
1423 OUTREG(vblank_reg, *vb);
1424 OUTREG(vtotal_reg, *vt);
1425 OUTREG(src_size_reg, *ss);
1da177e4 1426
394d3af7
KH		 1427 switch (dinfo->info->var.vmode & (FB_VMODE_INTERLACED |
1428 FB_VMODE_ODD_FLD_FIRST)) {
1429 case FB_VMODE_INTERLACED | FB_VMODE_ODD_FLD_FIRST:
1430 OUTREG(pipe_stat_reg, 0xFFFF | PIPESTAT_FLD_EVT_ODD_EN);
1431 break;
1432 case FB_VMODE_INTERLACED: /* even lines first */
1433 OUTREG(pipe_stat_reg, 0xFFFF | PIPESTAT_FLD_EVT_EVEN_EN);
1434 break;
1435 default: /* non-interlaced */
1436 OUTREG(pipe_stat_reg, 0xFFFF); /* clear all status bits only */
1437 }
1da177e4
LT		 1438 /* Enable pipe */
1439 OUTREG(pipe_conf_reg, *pipe_conf | PIPECONF_ENABLE);
1440
1441 /* Enable sync */
1442 tmp = INREG(ADPA);
1443 tmp &= ~ADPA_DPMS_CONTROL_MASK;
1444 tmp |= ADPA_DPMS_D0;
1445 OUTREG(ADPA, tmp);
1446
1447 /* setup display plane */
1448 if (dinfo->pdev->device == PCI_DEVICE_ID_INTEL_830M) {
1449 /*
1450 * i830M errata: the display plane must be enabled
1451 * to allow writes to the other bits in the plane
1452 * control register.
1453 */
1454 tmp = INREG(DSPACNTR);
1455 if ((tmp & DISPPLANE_PLANE_ENABLE) != DISPPLANE_PLANE_ENABLE) {
1456 tmp |= DISPPLANE_PLANE_ENABLE;
1457 OUTREG(DSPACNTR, tmp);
1458 OUTREG(DSPACNTR,
1459 hw->disp_a_ctrl|DISPPLANE_PLANE_ENABLE);
1460 mdelay(1);
3aff13cf 1461 }
1da177e4
LT		 1462 }
1463
1464 OUTREG(DSPACNTR, hw->disp_a_ctrl & ~DISPPLANE_PLANE_ENABLE);
1465 OUTREG(DSPASTRIDE, hw->disp_a_stride);
1466 OUTREG(DSPABASE, hw->disp_a_base);
1467
1468 /* Enable plane */
1469 if (!blank) {
1470 tmp = INREG(DSPACNTR);
1471 tmp |= DISPPLANE_PLANE_ENABLE;
1472 OUTREG(DSPACNTR, tmp);
1473 OUTREG(DSPABASE, hw->disp_a_base);
1474 }
1475
1476 return 0;
1477}
1478
1479/* forward declarations */
1480static void refresh_ring(struct intelfb_info *dinfo);
1481static void reset_state(struct intelfb_info *dinfo);
1482static void do_flush(struct intelfb_info *dinfo);
1483
71c6efd9
OJ		 1484static u32 get_ring_space(struct intelfb_info *dinfo)
1485{
1486 u32 ring_space;
1487
1488 if (dinfo->ring_tail >= dinfo->ring_head)
1489 ring_space = dinfo->ring.size -
1490 (dinfo->ring_tail - dinfo->ring_head);
1491 else
1492 ring_space = dinfo->ring_head - dinfo->ring_tail;
1493
1494 if (ring_space > RING_MIN_FREE)
1495 ring_space -= RING_MIN_FREE;
1496 else
1497 ring_space = 0;
1498
1499 return ring_space;
1500}
1501
689c9568 1502static int wait_ring(struct intelfb_info *dinfo, int n)
1da177e4
LT		 1503{
1504 int i = 0;
1505 unsigned long end;
1506 u32 last_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
1507
1508#if VERBOSE > 0
1509 DBG_MSG("wait_ring: %d\n", n);
1510#endif
1511
1512 end = jiffies + (HZ * 3);
1513 while (dinfo->ring_space < n) {
0fe6e2d2 1514 dinfo->ring_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
71c6efd9
OJ		 1515 dinfo->ring_space = get_ring_space(dinfo);
1516
0fe6e2d2 1517 if (dinfo->ring_head != last_head) {
1da177e4 1518 end = jiffies + (HZ * 3);
0fe6e2d2 1519 last_head = dinfo->ring_head;
1da177e4
LT		 1520 }
1521 i++;
1522 if (time_before(end, jiffies)) {
1523 if (!i) {
1524 /* Try again */
1525 reset_state(dinfo);
1526 refresh_ring(dinfo);
1527 do_flush(dinfo);
1528 end = jiffies + (HZ * 3);
1529 i = 1;
1530 } else {
1531 WRN_MSG("ring buffer : space: %d wanted %d\n",
1532 dinfo->ring_space, n);
1533 WRN_MSG("lockup - turning off hardware "
1534 "acceleration\n");
1535 dinfo->ring_lockup = 1;
1536 break;
1537 }
1538 }
1539 udelay(1);
1540 }
1541 return i;
1542}
1543
689c9568
KH		 1544static void do_flush(struct intelfb_info *dinfo)
1545{
1da177e4
LT		 1546 START_RING(2);
1547 OUT_RING(MI_FLUSH | MI_WRITE_DIRTY_STATE | MI_INVALIDATE_MAP_CACHE);
1548 OUT_RING(MI_NOOP);
1549 ADVANCE_RING();
1550}
1551
689c9568 1552void intelfbhw_do_sync(struct intelfb_info *dinfo)
1da177e4
LT		 1553{
1554#if VERBOSE > 0
1555 DBG_MSG("intelfbhw_do_sync\n");
1556#endif
1557
1558 if (!dinfo->accel)
1559 return;
1560
1561 /*
1562 * Send a flush, then wait until the ring is empty. This is what
1563 * the XFree86 driver does, and actually it doesn't seem a lot worse
1564 * than the recommended method (both have problems).
1565 */
1566 do_flush(dinfo);
1567 wait_ring(dinfo, dinfo->ring.size - RING_MIN_FREE);
1568 dinfo->ring_space = dinfo->ring.size - RING_MIN_FREE;
1569}
1570
689c9568 1571static void refresh_ring(struct intelfb_info *dinfo)
1da177e4
LT		 1572{
1573#if VERBOSE > 0
1574 DBG_MSG("refresh_ring\n");
1575#endif
1576
0fe6e2d2 1577 dinfo->ring_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
1da177e4 1578 dinfo->ring_tail = INREG(PRI_RING_TAIL) & RING_TAIL_MASK;
71c6efd9 1579 dinfo->ring_space = get_ring_space(dinfo);
1da177e4
LT		 1580}
1581
689c9568 1582static void reset_state(struct intelfb_info *dinfo)
1da177e4
LT		 1583{
1584 int i;
1585 u32 tmp;
1586
1587#if VERBOSE > 0
1588 DBG_MSG("reset_state\n");
1589#endif
1590
1591 for (i = 0; i < FENCE_NUM; i++)
1592 OUTREG(FENCE + (i << 2), 0);
1593
1594 /* Flush the ring buffer if it's enabled. */
1595 tmp = INREG(PRI_RING_LENGTH);
1596 if (tmp & RING_ENABLE) {
1597#if VERBOSE > 0
1598 DBG_MSG("reset_state: ring was enabled\n");
1599#endif
1600 refresh_ring(dinfo);
1601 intelfbhw_do_sync(dinfo);
1602 DO_RING_IDLE();
1603 }
1604
1605 OUTREG(PRI_RING_LENGTH, 0);
1606 OUTREG(PRI_RING_HEAD, 0);
1607 OUTREG(PRI_RING_TAIL, 0);
1608 OUTREG(PRI_RING_START, 0);
1609}
1610
1611/* Stop the 2D engine, and turn off the ring buffer. */
689c9568 1612void intelfbhw_2d_stop(struct intelfb_info *dinfo)
1da177e4
LT		 1613{
1614#if VERBOSE > 0
689c9568
KH		 1615 DBG_MSG("intelfbhw_2d_stop: accel: %d, ring_active: %d\n",
1616 dinfo->accel, dinfo->ring_active);
1da177e4
LT		 1617#endif
1618
1619 if (!dinfo->accel)
1620 return;
1621
1622 dinfo->ring_active = 0;
1623 reset_state(dinfo);
1624}
1625
1626/*
1627 * Enable the ring buffer, and initialise the 2D engine.
1628 * It is assumed that the graphics engine has been stopped by previously
1629 * calling intelfb_2d_stop().
1630 */
689c9568 1631void intelfbhw_2d_start(struct intelfb_info *dinfo)
1da177e4
LT		 1632{
1633#if VERBOSE > 0
1634 DBG_MSG("intelfbhw_2d_start: accel: %d, ring_active: %d\n",
1635 dinfo->accel, dinfo->ring_active);
1636#endif
1637
1638 if (!dinfo->accel)
1639 return;
1640
1641 /* Initialise the primary ring buffer. */
1642 OUTREG(PRI_RING_LENGTH, 0);
1643 OUTREG(PRI_RING_TAIL, 0);
1644 OUTREG(PRI_RING_HEAD, 0);
1645
1646 OUTREG(PRI_RING_START, dinfo->ring.physical & RING_START_MASK);
1647 OUTREG(PRI_RING_LENGTH,
1648 ((dinfo->ring.size - GTT_PAGE_SIZE) & RING_LENGTH_MASK) |
1649 RING_NO_REPORT | RING_ENABLE);
1650 refresh_ring(dinfo);
1651 dinfo->ring_active = 1;
1652}
1653
1654/* 2D fillrect (solid fill or invert) */
689c9568
KH		 1655void intelfbhw_do_fillrect(struct intelfb_info *dinfo, u32 x, u32 y, u32 w,
1656 u32 h, u32 color, u32 pitch, u32 bpp, u32 rop)
1da177e4
LT		 1657{
1658 u32 br00, br09, br13, br14, br16;
1659
1660#if VERBOSE > 0
1661 DBG_MSG("intelfbhw_do_fillrect: (%d,%d) %dx%d, c 0x%06x, p %d bpp %d, "
1662 "rop 0x%02x\n", x, y, w, h, color, pitch, bpp, rop);
1663#endif
1664
1665 br00 = COLOR_BLT_CMD;
1666 br09 = dinfo->fb_start + (y * pitch + x * (bpp / 8));
1667 br13 = (rop << ROP_SHIFT) | pitch;
1668 br14 = (h << HEIGHT_SHIFT) | ((w * (bpp / 8)) << WIDTH_SHIFT);
1669 br16 = color;
1670
1671 switch (bpp) {
1672 case 8:
1673 br13 |= COLOR_DEPTH_8;
1674 break;
1675 case 16:
1676 br13 |= COLOR_DEPTH_16;
1677 break;
1678 case 32:
1679 br13 |= COLOR_DEPTH_32;
1680 br00 |= WRITE_ALPHA | WRITE_RGB;
1681 break;
1682 }
1683
1684 START_RING(6);
1685 OUT_RING(br00);
1686 OUT_RING(br13);
1687 OUT_RING(br14);
1688 OUT_RING(br09);
1689 OUT_RING(br16);
1690 OUT_RING(MI_NOOP);
1691 ADVANCE_RING();
1692
1693#if VERBOSE > 0
1694 DBG_MSG("ring = 0x%08x, 0x%08x (%d)\n", dinfo->ring_head,
1695 dinfo->ring_tail, dinfo->ring_space);
1696#endif
1697}
1698
1699void
1700intelfbhw_do_bitblt(struct intelfb_info *dinfo, u32 curx, u32 cury,
1701 u32 dstx, u32 dsty, u32 w, u32 h, u32 pitch, u32 bpp)
1702{
1703 u32 br00, br09, br11, br12, br13, br22, br23, br26;
1704
1705#if VERBOSE > 0
1706 DBG_MSG("intelfbhw_do_bitblt: (%d,%d)->(%d,%d) %dx%d, p %d bpp %d\n",
1707 curx, cury, dstx, dsty, w, h, pitch, bpp);
1708#endif
1709
1710 br00 = XY_SRC_COPY_BLT_CMD;
1711 br09 = dinfo->fb_start;
1712 br11 = (pitch << PITCH_SHIFT);
1713 br12 = dinfo->fb_start;
1714 br13 = (SRC_ROP_GXCOPY << ROP_SHIFT) | (pitch << PITCH_SHIFT);
1715 br22 = (dstx << WIDTH_SHIFT) | (dsty << HEIGHT_SHIFT);
1716 br23 = ((dstx + w) << WIDTH_SHIFT) |
1717 ((dsty + h) << HEIGHT_SHIFT);
1718 br26 = (curx << WIDTH_SHIFT) | (cury << HEIGHT_SHIFT);
1719
1720 switch (bpp) {
1721 case 8:
1722 br13 |= COLOR_DEPTH_8;
1723 break;
1724 case 16:
1725 br13 |= COLOR_DEPTH_16;
1726 break;
1727 case 32:
1728 br13 |= COLOR_DEPTH_32;
1729 br00 |= WRITE_ALPHA | WRITE_RGB;
1730 break;
1731 }
1732
1733 START_RING(8);
1734 OUT_RING(br00);
1735 OUT_RING(br13);
1736 OUT_RING(br22);
1737 OUT_RING(br23);
1738 OUT_RING(br09);
1739 OUT_RING(br26);
1740 OUT_RING(br11);
1741 OUT_RING(br12);
1742 ADVANCE_RING();
1743}
1744
689c9568
KH		 1745int intelfbhw_do_drawglyph(struct intelfb_info *dinfo, u32 fg, u32 bg, u32 w,
1746 u32 h, const u8* cdat, u32 x, u32 y, u32 pitch,
1747 u32 bpp)
1da177e4
LT		 1748{
1749 int nbytes, ndwords, pad, tmp;
1750 u32 br00, br09, br13, br18, br19, br22, br23;
1751 int dat, ix, iy, iw;
1752 int i, j;
1753
1754#if VERBOSE > 0
1755 DBG_MSG("intelfbhw_do_drawglyph: (%d,%d) %dx%d\n", x, y, w, h);
1756#endif
1757
1758 /* size in bytes of a padded scanline */
1759 nbytes = ROUND_UP_TO(w, 16) / 8;
1760
1761 /* Total bytes of padded scanline data to write out. */
1762 nbytes = nbytes * h;
1763
1764 /*
1765 * Check if the glyph data exceeds the immediate mode limit.
1766 * It would take a large font (1K pixels) to hit this limit.
1767 */
1768 if (nbytes > MAX_MONO_IMM_SIZE)
1769 return 0;
1770
1771 /* Src data is packaged a dword (32-bit) at a time. */
1772 ndwords = ROUND_UP_TO(nbytes, 4) / 4;
1773
1774 /*
1775 * Ring has to be padded to a quad word. But because the command starts
1776 with 7 bytes, pad only if there is an even number of ndwords
1777 */
1778 pad = !(ndwords % 2);
1779
1780 tmp = (XY_MONO_SRC_IMM_BLT_CMD & DW_LENGTH_MASK) + ndwords;
1781 br00 = (XY_MONO_SRC_IMM_BLT_CMD & ~DW_LENGTH_MASK) | tmp;
1782 br09 = dinfo->fb_start;
1783 br13 = (SRC_ROP_GXCOPY << ROP_SHIFT) | (pitch << PITCH_SHIFT);
1784 br18 = bg;
1785 br19 = fg;
1786 br22 = (x << WIDTH_SHIFT) | (y << HEIGHT_SHIFT);
1787 br23 = ((x + w) << WIDTH_SHIFT) | ((y + h) << HEIGHT_SHIFT);
1788
1789 switch (bpp) {
1790 case 8:
1791 br13 |= COLOR_DEPTH_8;
1792 break;
1793 case 16:
1794 br13 |= COLOR_DEPTH_16;
1795 break;
1796 case 32:
1797 br13 |= COLOR_DEPTH_32;
1798 br00 |= WRITE_ALPHA | WRITE_RGB;
1799 break;
1800 }
1801
1802 START_RING(8 + ndwords);
1803 OUT_RING(br00);
1804 OUT_RING(br13);
1805 OUT_RING(br22);
1806 OUT_RING(br23);
1807 OUT_RING(br09);
1808 OUT_RING(br18);
1809 OUT_RING(br19);
1810 ix = iy = 0;
1811 iw = ROUND_UP_TO(w, 8) / 8;
1812 while (ndwords--) {
1813 dat = 0;
1814 for (j = 0; j < 2; ++j) {
1815 for (i = 0; i < 2; ++i) {
1816 if (ix != iw || i == 0)
1817 dat |= cdat[iy*iw + ix++] << (i+j*2)*8;
1818 }
1819 if (ix == iw && iy != (h-1)) {
1820 ix = 0;
1821 ++iy;
1822 }
1823 }
1824 OUT_RING(dat);
1825 }
1826 if (pad)
1827 OUT_RING(MI_NOOP);
1828 ADVANCE_RING();
1829
1830 return 1;
1831}
1832
1833/* HW cursor functions. */
689c9568 1834void intelfbhw_cursor_init(struct intelfb_info *dinfo)
1da177e4
LT		 1835{
1836 u32 tmp;
1837
1838#if VERBOSE > 0
1839 DBG_MSG("intelfbhw_cursor_init\n");
1840#endif
1841
3aff13cf 1842 if (dinfo->mobile || IS_I9XX(dinfo)) {
1da177e4
LT		 1843 if (!dinfo->cursor.physical)
1844 return;
1845 tmp = INREG(CURSOR_A_CONTROL);
1846 tmp &= ~(CURSOR_MODE_MASK | CURSOR_MOBILE_GAMMA_ENABLE |
1847 CURSOR_MEM_TYPE_LOCAL |
1848 (1 << CURSOR_PIPE_SELECT_SHIFT));
1849 tmp |= CURSOR_MODE_DISABLE;
1850 OUTREG(CURSOR_A_CONTROL, tmp);
1851 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1852 } else {
1853 tmp = INREG(CURSOR_CONTROL);
1854 tmp &= ~(CURSOR_FORMAT_MASK | CURSOR_GAMMA_ENABLE |
1855 CURSOR_ENABLE | CURSOR_STRIDE_MASK);
2079a513 1856 tmp |= CURSOR_FORMAT_3C;
1da177e4
LT		 1857 OUTREG(CURSOR_CONTROL, tmp);
1858 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.offset << 12);
1859 tmp = (64 << CURSOR_SIZE_H_SHIFT) |
1860 (64 << CURSOR_SIZE_V_SHIFT);
1861 OUTREG(CURSOR_SIZE, tmp);
1862 }
1863}
1864
689c9568 1865void intelfbhw_cursor_hide(struct intelfb_info *dinfo)
1da177e4
LT		 1866{
1867 u32 tmp;
1868
1869#if VERBOSE > 0
1870 DBG_MSG("intelfbhw_cursor_hide\n");
1871#endif
1872
1873 dinfo->cursor_on = 0;
3aff13cf 1874 if (dinfo->mobile || IS_I9XX(dinfo)) {
1da177e4
LT		 1875 if (!dinfo->cursor.physical)
1876 return;
1877 tmp = INREG(CURSOR_A_CONTROL);
1878 tmp &= ~CURSOR_MODE_MASK;
1879 tmp |= CURSOR_MODE_DISABLE;
1880 OUTREG(CURSOR_A_CONTROL, tmp);
1881 /* Flush changes */
1882 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1883 } else {
1884 tmp = INREG(CURSOR_CONTROL);
1885 tmp &= ~CURSOR_ENABLE;
1886 OUTREG(CURSOR_CONTROL, tmp);
1887 }
1888}
1889
689c9568 1890void intelfbhw_cursor_show(struct intelfb_info *dinfo)
1da177e4
LT		 1891{
1892 u32 tmp;
1893
1894#if VERBOSE > 0
1895 DBG_MSG("intelfbhw_cursor_show\n");
1896#endif
1897
1898 dinfo->cursor_on = 1;
1899
1900 if (dinfo->cursor_blanked)
1901 return;
1902
3aff13cf 1903 if (dinfo->mobile || IS_I9XX(dinfo)) {
1da177e4
LT		 1904 if (!dinfo->cursor.physical)
1905 return;
1906 tmp = INREG(CURSOR_A_CONTROL);
1907 tmp &= ~CURSOR_MODE_MASK;
1908 tmp |= CURSOR_MODE_64_4C_AX;
1909 OUTREG(CURSOR_A_CONTROL, tmp);
1910 /* Flush changes */
1911 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1912 } else {
1913 tmp = INREG(CURSOR_CONTROL);
1914 tmp |= CURSOR_ENABLE;
1915 OUTREG(CURSOR_CONTROL, tmp);
1916 }
1917}
1918
689c9568 1919void intelfbhw_cursor_setpos(struct intelfb_info *dinfo, int x, int y)
1da177e4
LT		 1920{
1921 u32 tmp;
1922
1923#if VERBOSE > 0
1924 DBG_MSG("intelfbhw_cursor_setpos: (%d, %d)\n", x, y);
1925#endif
1926
1927 /*
3aff13cf
DA		 1928 * Sets the position. The coordinates are assumed to already
1929 * have any offset adjusted. Assume that the cursor is never
1da177e4
LT		 1930 * completely off-screen, and that x, y are always >= 0.
1931 */
1932
1933 tmp = ((x & CURSOR_POS_MASK) << CURSOR_X_SHIFT) |
1934 ((y & CURSOR_POS_MASK) << CURSOR_Y_SHIFT);
1935 OUTREG(CURSOR_A_POSITION, tmp);
8bb91f6a 1936
689c9568 1937 if (IS_I9XX(dinfo))
8bb91f6a 1938 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1da177e4
LT		 1939}
1940
689c9568 1941void intelfbhw_cursor_setcolor(struct intelfb_info *dinfo, u32 bg, u32 fg)
1da177e4
LT		 1942{
1943#if VERBOSE > 0
1944 DBG_MSG("intelfbhw_cursor_setcolor\n");
1945#endif
1946
1947 OUTREG(CURSOR_A_PALETTE0, bg & CURSOR_PALETTE_MASK);
1948 OUTREG(CURSOR_A_PALETTE1, fg & CURSOR_PALETTE_MASK);
1949 OUTREG(CURSOR_A_PALETTE2, fg & CURSOR_PALETTE_MASK);
1950 OUTREG(CURSOR_A_PALETTE3, bg & CURSOR_PALETTE_MASK);
1951}
1952
689c9568
KH		 1953void intelfbhw_cursor_load(struct intelfb_info *dinfo, int width, int height,
1954 u8 *data)
1da177e4
LT		 1955{
1956 u8 __iomem *addr = (u8 __iomem *)dinfo->cursor.virtual;
1957 int i, j, w = width / 8;
1958 int mod = width % 8, t_mask, d_mask;
1959
1960#if VERBOSE > 0
1961 DBG_MSG("intelfbhw_cursor_load\n");
1962#endif
1963
1964 if (!dinfo->cursor.virtual)
1965 return;
1966
1967 t_mask = 0xff >> mod;
1968 d_mask = ~(0xff >> mod);
1969 for (i = height; i--; ) {
1970 for (j = 0; j < w; j++) {
1971 writeb(0x00, addr + j);
1972 writeb(*(data++), addr + j+8);
1973 }
1974 if (mod) {
1975 writeb(t_mask, addr + j);
1976 writeb(*(data++) & d_mask, addr + j+8);
1977 }
1978 addr += 16;
1979 }
1980}
1981
689c9568
KH		 1982void intelfbhw_cursor_reset(struct intelfb_info *dinfo)
1983{
1da177e4
LT		 1984 u8 __iomem *addr = (u8 __iomem *)dinfo->cursor.virtual;
1985 int i, j;
1986
1987#if VERBOSE > 0
1988 DBG_MSG("intelfbhw_cursor_reset\n");
1989#endif
1990
1991 if (!dinfo->cursor.virtual)
1992 return;
1993
1994 for (i = 64; i--; ) {
1995 for (j = 0; j < 8; j++) {
1996 writeb(0xff, addr + j+0);
1997 writeb(0x00, addr + j+8);
1998 }
1999 addr += 16;
2000 }
2001}
7649757b 2002
394d3af7
KH		 2003static irqreturn_t intelfbhw_irq(int irq, void *dev_id)
2004{
7649757b 2005 u16 tmp;
15aafa2f 2006 struct intelfb_info *dinfo = dev_id;
7649757b
EH		 2007
2008 spin_lock(&dinfo->int_lock);
2009
2010 tmp = INREG16(IIR);
394d3af7
KH		 2011 if (dinfo->info->var.vmode & FB_VMODE_INTERLACED)
2012 tmp &= PIPE_A_EVENT_INTERRUPT;
2013 else
2014 tmp &= VSYNC_PIPE_A_INTERRUPT; /* non-interlaced */
7649757b
EH		 2015
2016 if (tmp == 0) {
2017 spin_unlock(&dinfo->int_lock);
394d3af7 2018 return IRQ_RETVAL(0); /* not us */
7649757b
EH		 2019 }
2020
394d3af7
KH		 2021 /* clear status bits 0-15 ASAP and don't touch bits 16-31 */
2022 OUTREG(PIPEASTAT, INREG(PIPEASTAT));
7649757b 2023
394d3af7
KH		 2024 OUTREG16(IIR, tmp);
2025 if (dinfo->vsync.pan_display) {
2026 dinfo->vsync.pan_display = 0;
2027 OUTREG(DSPABASE, dinfo->vsync.pan_offset);
7649757b
EH		 2028 }
2029
394d3af7
KH		 2030 dinfo->vsync.count++;
2031 wake_up_interruptible(&dinfo->vsync.wait);
2032
7649757b
EH		 2033 spin_unlock(&dinfo->int_lock);
2034
394d3af7 2035 return IRQ_RETVAL(1);
7649757b
EH		 2036}
2037
394d3af7
KH		 2038int intelfbhw_enable_irq(struct intelfb_info *dinfo)
2039{
2040 u16 tmp;
7649757b 2041 if (!test_and_set_bit(0, &dinfo->irq_flags)) {
38515e90 2042 if (request_irq(dinfo->pdev->irq, intelfbhw_irq, IRQF_SHARED,
394d3af7 2043 "intelfb", dinfo)) {
7649757b
EH		 2044 clear_bit(0, &dinfo->irq_flags);
2045 return -EINVAL;
2046 }
2047
2048 spin_lock_irq(&dinfo->int_lock);
394d3af7
KH		 2049 OUTREG16(HWSTAM, 0xfffe); /* i830 DRM uses ffff */
2050 OUTREG16(IMR, 0);
2051 } else
7649757b 2052 spin_lock_irq(&dinfo->int_lock);
394d3af7
KH		 2053
2054 if (dinfo->info->var.vmode & FB_VMODE_INTERLACED)
2055 tmp = PIPE_A_EVENT_INTERRUPT;
2056 else
2057 tmp = VSYNC_PIPE_A_INTERRUPT; /* non-interlaced */
2058 if (tmp != INREG16(IER)) {
2059 DBG_MSG("changing IER to 0x%X\n", tmp);
2060 OUTREG16(IER, tmp);
7649757b 2061 }
394d3af7
KH		 2062
2063 spin_unlock_irq(&dinfo->int_lock);
7649757b
EH		 2064 return 0;
2065}
2066
394d3af7
KH		 2067void intelfbhw_disable_irq(struct intelfb_info *dinfo)
2068{
7649757b 2069 if (test_and_clear_bit(0, &dinfo->irq_flags)) {
f80d0d23
EH		 2070 if (dinfo->vsync.pan_display) {
2071 dinfo->vsync.pan_display = 0;
2072 OUTREG(DSPABASE, dinfo->vsync.pan_offset);
2073 }
7649757b
EH		 2074 spin_lock_irq(&dinfo->int_lock);
2075 OUTREG16(HWSTAM, 0xffff);
2076 OUTREG16(IMR, 0xffff);
2077 OUTREG16(IER, 0x0);
2078
ee5618f4 2079 OUTREG16(IIR, INREG16(IIR)); /* clear IRQ requests */
7649757b
EH		 2080 spin_unlock_irq(&dinfo->int_lock);
2081
2082 free_irq(dinfo->pdev->irq, dinfo);
2083 }
2084}
37bced38 2085
689c9568
KH		 2086int intelfbhw_wait_for_vsync(struct intelfb_info *dinfo, u32 pipe)
2087{
37bced38
EH		 2088 struct intelfb_vsync *vsync;
2089 unsigned int count;
2090 int ret;
2091
2092 switch (pipe) {
2093 case 0:
2094 vsync = &dinfo->vsync;
2095 break;
2096 default:
2097 return -ENODEV;
2098 }
2099
394d3af7 2100 ret = intelfbhw_enable_irq(dinfo);
689c9568 2101 if (ret)
37bced38 2102 return ret;
37bced38
EH		 2103
2104 count = vsync->count;
689c9568
KH		 2105 ret = wait_event_interruptible_timeout(vsync->wait,
2106 count != vsync->count, HZ / 10);
2107 if (ret < 0)
37bced38 2108 return ret;
37bced38 2109 if (ret == 0) {
37bced38
EH		 2110 DBG_MSG("wait_for_vsync timed out!\n");
2111 return -ETIMEDOUT;
2112 }
2113
2114 return 0;
2115}
Linux 6.x block layer and io_uring tree(s)