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Merge tag 'gpio-v3.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
[linux-2.6.git] / drivers / video / vermilion / vermilion.c
blob09a136633f355673e935cf68be459d3521aa1ae9
1 /*
2 * Copyright (c) Intel Corp. 2007.
3 * All Rights Reserved.
4 *
5 * Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
6 * develop this driver.
7 *
8 * This file is part of the Vermilion Range fb driver.
9 * The Vermilion Range fb driver is free software;
10 * you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * The Vermilion Range fb driver is distributed
16 * in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this driver; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 *
25 * Authors:
26 * Thomas Hellström <thomas-at-tungstengraphics-dot-com>
27 * Michel Dänzer <michel-at-tungstengraphics-dot-com>
28 * Alan Hourihane <alanh-at-tungstengraphics-dot-com>
29 */
30
31 #include <linux/module.h>
32 #include <linux/kernel.h>
33 #include <linux/errno.h>
34 #include <linux/string.h>
35 #include <linux/delay.h>
36 #include <linux/slab.h>
37 #include <linux/mm.h>
38 #include <linux/fb.h>
39 #include <linux/pci.h>
40 #include <asm/cacheflush.h>
41 #include <asm/tlbflush.h>
42 #include <linux/mmzone.h>
43
44 /* #define VERMILION_DEBUG */
45
46 #include "vermilion.h"
47
48 #define MODULE_NAME "vmlfb"
49
50 #define VML_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16)
51
52 static struct mutex vml_mutex;
53 static struct list_head global_no_mode;
54 static struct list_head global_has_mode;
55 static struct fb_ops vmlfb_ops;
56 static struct vml_sys *subsys = NULL;
57 static char *vml_default_mode = "1024x768@60";
58 static struct fb_videomode defaultmode = {
59 NULL, 60, 1024, 768, 12896, 144, 24, 29, 3, 136, 6,
60 0, FB_VMODE_NONINTERLACED
61 };
62
63 static u32 vml_mem_requested = (10 * 1024 * 1024);
64 static u32 vml_mem_contig = (4 * 1024 * 1024);
65 static u32 vml_mem_min = (4 * 1024 * 1024);
66
67 static u32 vml_clocks[] = {
68 6750,
69 13500,
70 27000,
71 29700,
72 37125,
73 54000,
74 59400,
75 74250,
76 120000,
77 148500
78 };
79
80 static u32 vml_num_clocks = ARRAY_SIZE(vml_clocks);
81
82 /*
83 * Allocate a contiguous vram area and make its linear kernel map
84 * uncached.
85 */
86
87 static int vmlfb_alloc_vram_area(struct vram_area *va, unsigned max_order,
88 unsigned min_order)
89 {
90 gfp_t flags;
91 unsigned long i;
92
93 max_order++;
94 do {
95 /*
96 * Really try hard to get the needed memory.
97 * We need memory below the first 32MB, so we
98 * add the __GFP_DMA flag that guarantees that we are
99 * below the first 16MB.
100 */
101
102 flags = __GFP_DMA | __GFP_HIGH;
103 va->logical =
104 __get_free_pages(flags, --max_order);
105 } while (va->logical == 0 && max_order > min_order);
106
107 if (!va->logical)
108 return -ENOMEM;
109
110 va->phys = virt_to_phys((void *)va->logical);
111 va->size = PAGE_SIZE << max_order;
112 va->order = max_order;
113
114 /*
115 * It seems like __get_free_pages only ups the usage count
116 * of the first page. This doesn't work with fault mapping, so
117 * up the usage count once more (XXX: should use split_page or
118 * compound page).
119 */
120
121 memset((void *)va->logical, 0x00, va->size);
122 for (i = va->logical; i < va->logical + va->size; i += PAGE_SIZE) {
123 get_page(virt_to_page(i));
124 }
125
126 /*
127 * Change caching policy of the linear kernel map to avoid
128 * mapping type conflicts with user-space mappings.
129 */
130 set_pages_uc(virt_to_page(va->logical), va->size >> PAGE_SHIFT);
131
132 printk(KERN_DEBUG MODULE_NAME
133 ": Allocated %ld bytes vram area at 0x%08lx\n",
134 va->size, va->phys);
135
136 return 0;
137 }
138
139 /*
140 * Free a contiguous vram area and reset its linear kernel map
141 * mapping type.
142 */
143
144 static void vmlfb_free_vram_area(struct vram_area *va)
145 {
146 unsigned long j;
147
148 if (va->logical) {
149
150 /*
151 * Reset the linear kernel map caching policy.
152 */
153
154 set_pages_wb(virt_to_page(va->logical),
155 va->size >> PAGE_SHIFT);
156
157 /*
158 * Decrease the usage count on the pages we've used
159 * to compensate for upping when allocating.
160 */
161
162 for (j = va->logical; j < va->logical + va->size;
163 j += PAGE_SIZE) {
164 (void)put_page_testzero(virt_to_page(j));
165 }
166
167 printk(KERN_DEBUG MODULE_NAME
168 ": Freeing %ld bytes vram area at 0x%08lx\n",
169 va->size, va->phys);
170 free_pages(va->logical, va->order);
171
172 va->logical = 0;
173 }
174 }
175
176 /*
177 * Free allocated vram.
178 */
179
180 static void vmlfb_free_vram(struct vml_info *vinfo)
181 {
182 int i;
183
184 for (i = 0; i < vinfo->num_areas; ++i) {
185 vmlfb_free_vram_area(&vinfo->vram[i]);
186 }
187 vinfo->num_areas = 0;
188 }
189
190 /*
191 * Allocate vram. Currently we try to allocate contiguous areas from the
192 * __GFP_DMA zone and puzzle them together. A better approach would be to
193 * allocate one contiguous area for scanout and use one-page allocations for
194 * offscreen areas. This requires user-space and GPU virtual mappings.
195 */
196
197 static int vmlfb_alloc_vram(struct vml_info *vinfo,
198 size_t requested,
199 size_t min_total, size_t min_contig)
200 {
201 int i, j;
202 int order;
203 int contiguous;
204 int err;
205 struct vram_area *va;
206 struct vram_area *va2;
207
208 vinfo->num_areas = 0;
209 for (i = 0; i < VML_VRAM_AREAS; ++i) {
210 va = &vinfo->vram[i];
211 order = 0;
212
213 while (requested > (PAGE_SIZE << order) && order < MAX_ORDER)
214 order++;
215
216 err = vmlfb_alloc_vram_area(va, order, 0);
217
218 if (err)
219 break;
220
221 if (i == 0) {
222 vinfo->vram_start = va->phys;
223 vinfo->vram_logical = (void __iomem *) va->logical;
224 vinfo->vram_contig_size = va->size;
225 vinfo->num_areas = 1;
226 } else {
227 contiguous = 0;
228
229 for (j = 0; j < i; ++j) {
230 va2 = &vinfo->vram[j];
231 if (va->phys + va->size == va2->phys ||
232 va2->phys + va2->size == va->phys) {
233 contiguous = 1;
234 break;
235 }
236 }
237
238 if (contiguous) {
239 vinfo->num_areas++;
240 if (va->phys < vinfo->vram_start) {
241 vinfo->vram_start = va->phys;
242 vinfo->vram_logical =
243 (void __iomem *)va->logical;
244 }
245 vinfo->vram_contig_size += va->size;
246 } else {
247 vmlfb_free_vram_area(va);
248 break;
249 }
250 }
251
252 if (requested < va->size)
253 break;
254 else
255 requested -= va->size;
256 }
257
258 if (vinfo->vram_contig_size > min_total &&
259 vinfo->vram_contig_size > min_contig) {
260
261 printk(KERN_DEBUG MODULE_NAME
262 ": Contiguous vram: %ld bytes at physical 0x%08lx.\n",
263 (unsigned long)vinfo->vram_contig_size,
264 (unsigned long)vinfo->vram_start);
265
266 return 0;
267 }
268
269 printk(KERN_ERR MODULE_NAME
270 ": Could not allocate requested minimal amount of vram.\n");
271
272 vmlfb_free_vram(vinfo);
273
274 return -ENOMEM;
275 }
276
277 /*
278 * Find the GPU to use with our display controller.
279 */
280
281 static int vmlfb_get_gpu(struct vml_par *par)
282 {
283 mutex_lock(&vml_mutex);
284
285 par->gpu = pci_get_device(PCI_VENDOR_ID_INTEL, VML_DEVICE_GPU, NULL);
286
287 if (!par->gpu) {
288 mutex_unlock(&vml_mutex);
289 return -ENODEV;
290 }
291
292 mutex_unlock(&vml_mutex);
293
294 if (pci_enable_device(par->gpu) < 0)
295 return -ENODEV;
296
297 return 0;
298 }
299
300 /*
301 * Find a contiguous vram area that contains a given offset from vram start.
302 */
303 static int vmlfb_vram_offset(struct vml_info *vinfo, unsigned long offset)
304 {
305 unsigned long aoffset;
306 unsigned i;
307
308 for (i = 0; i < vinfo->num_areas; ++i) {
309 aoffset = offset - (vinfo->vram[i].phys - vinfo->vram_start);
310
311 if (aoffset < vinfo->vram[i].size) {
312 return 0;
313 }
314 }
315
316 return -EINVAL;
317 }
318
319 /*
320 * Remap the MMIO register spaces of the VDC and the GPU.
321 */
322
323 static int vmlfb_enable_mmio(struct vml_par *par)
324 {
325 int err;
326
327 par->vdc_mem_base = pci_resource_start(par->vdc, 0);
328 par->vdc_mem_size = pci_resource_len(par->vdc, 0);
329 if (!request_mem_region(par->vdc_mem_base, par->vdc_mem_size, "vmlfb")) {
330 printk(KERN_ERR MODULE_NAME
331 ": Could not claim display controller MMIO.\n");
332 return -EBUSY;
333 }
334 par->vdc_mem = ioremap_nocache(par->vdc_mem_base, par->vdc_mem_size);
335 if (par->vdc_mem == NULL) {
336 printk(KERN_ERR MODULE_NAME
337 ": Could not map display controller MMIO.\n");
338 err = -ENOMEM;
339 goto out_err_0;
340 }
341
342 par->gpu_mem_base = pci_resource_start(par->gpu, 0);
343 par->gpu_mem_size = pci_resource_len(par->gpu, 0);
344 if (!request_mem_region(par->gpu_mem_base, par->gpu_mem_size, "vmlfb")) {
345 printk(KERN_ERR MODULE_NAME ": Could not claim GPU MMIO.\n");
346 err = -EBUSY;
347 goto out_err_1;
348 }
349 par->gpu_mem = ioremap_nocache(par->gpu_mem_base, par->gpu_mem_size);
350 if (par->gpu_mem == NULL) {
351 printk(KERN_ERR MODULE_NAME ": Could not map GPU MMIO.\n");
352 err = -ENOMEM;
353 goto out_err_2;
354 }
355
356 return 0;
357
358 out_err_2:
359 release_mem_region(par->gpu_mem_base, par->gpu_mem_size);
360 out_err_1:
361 iounmap(par->vdc_mem);
362 out_err_0:
363 release_mem_region(par->vdc_mem_base, par->vdc_mem_size);
364 return err;
365 }
366
367 /*
368 * Unmap the VDC and GPU register spaces.
369 */
370
371 static void vmlfb_disable_mmio(struct vml_par *par)
372 {
373 iounmap(par->gpu_mem);
374 release_mem_region(par->gpu_mem_base, par->gpu_mem_size);
375 iounmap(par->vdc_mem);
376 release_mem_region(par->vdc_mem_base, par->vdc_mem_size);
377 }
378
379 /*
380 * Release and uninit the VDC and GPU.
381 */
382
383 static void vmlfb_release_devices(struct vml_par *par)
384 {
385 if (atomic_dec_and_test(&par->refcount)) {
386 pci_set_drvdata(par->vdc, NULL);
387 pci_disable_device(par->gpu);
388 pci_disable_device(par->vdc);
389 }
390 }
391
392 /*
393 * Free up allocated resources for a device.
394 */
395
396 static void vml_pci_remove(struct pci_dev *dev)
397 {
398 struct fb_info *info;
399 struct vml_info *vinfo;
400 struct vml_par *par;
401
402 info = pci_get_drvdata(dev);
403 if (info) {
404 vinfo = container_of(info, struct vml_info, info);
405 par = vinfo->par;
406 mutex_lock(&vml_mutex);
407 unregister_framebuffer(info);
408 fb_dealloc_cmap(&info->cmap);
409 vmlfb_free_vram(vinfo);
410 vmlfb_disable_mmio(par);
411 vmlfb_release_devices(par);
412 kfree(vinfo);
413 kfree(par);
414 mutex_unlock(&vml_mutex);
415 }
416 }
417
418 static void vmlfb_set_pref_pixel_format(struct fb_var_screeninfo *var)
419 {
420 switch (var->bits_per_pixel) {
421 case 16:
422 var->blue.offset = 0;
423 var->blue.length = 5;
424 var->green.offset = 5;
425 var->green.length = 5;
426 var->red.offset = 10;
427 var->red.length = 5;
428 var->transp.offset = 15;
429 var->transp.length = 1;
430 break;
431 case 32:
432 var->blue.offset = 0;
433 var->blue.length = 8;
434 var->green.offset = 8;
435 var->green.length = 8;
436 var->red.offset = 16;
437 var->red.length = 8;
438 var->transp.offset = 24;
439 var->transp.length = 0;
440 break;
441 default:
442 break;
443 }
444
445 var->blue.msb_right = var->green.msb_right =
446 var->red.msb_right = var->transp.msb_right = 0;
447 }
448
449 /*
450 * Device initialization.
451 * We initialize one vml_par struct per device and one vml_info
452 * struct per pipe. Currently we have only one pipe.
453 */
454
455 static int vml_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
456 {
457 struct vml_info *vinfo;
458 struct fb_info *info;
459 struct vml_par *par;
460 int err = 0;
461
462 par = kzalloc(sizeof(*par), GFP_KERNEL);
463 if (par == NULL)
464 return -ENOMEM;
465
466 vinfo = kzalloc(sizeof(*vinfo), GFP_KERNEL);
467 if (vinfo == NULL) {
468 err = -ENOMEM;
469 goto out_err_0;
470 }
471
472 vinfo->par = par;
473 par->vdc = dev;
474 atomic_set(&par->refcount, 1);
475
476 switch (id->device) {
477 case VML_DEVICE_VDC:
478 if ((err = vmlfb_get_gpu(par)))
479 goto out_err_1;
480 pci_set_drvdata(dev, &vinfo->info);
481 break;
482 default:
483 err = -ENODEV;
484 goto out_err_1;
485 break;
486 }
487
488 info = &vinfo->info;
489 info->flags = FBINFO_DEFAULT | FBINFO_PARTIAL_PAN_OK;
490
491 err = vmlfb_enable_mmio(par);
492 if (err)
493 goto out_err_2;
494
495 err = vmlfb_alloc_vram(vinfo, vml_mem_requested,
496 vml_mem_contig, vml_mem_min);
497 if (err)
498 goto out_err_3;
499
500 strcpy(info->fix.id, "Vermilion Range");
501 info->fix.mmio_start = 0;
502 info->fix.mmio_len = 0;
503 info->fix.smem_start = vinfo->vram_start;
504 info->fix.smem_len = vinfo->vram_contig_size;
505 info->fix.type = FB_TYPE_PACKED_PIXELS;
506 info->fix.visual = FB_VISUAL_TRUECOLOR;
507 info->fix.ypanstep = 1;
508 info->fix.xpanstep = 1;
509 info->fix.ywrapstep = 0;
510 info->fix.accel = FB_ACCEL_NONE;
511 info->screen_base = vinfo->vram_logical;
512 info->pseudo_palette = vinfo->pseudo_palette;
513 info->par = par;
514 info->fbops = &vmlfb_ops;
515 info->device = &dev->dev;
516
517 INIT_LIST_HEAD(&vinfo->head);
518 vinfo->pipe_disabled = 1;
519 vinfo->cur_blank_mode = FB_BLANK_UNBLANK;
520
521 info->var.grayscale = 0;
522 info->var.bits_per_pixel = 16;
523 vmlfb_set_pref_pixel_format(&info->var);
524
525 if (!fb_find_mode
526 (&info->var, info, vml_default_mode, NULL, 0, &defaultmode, 16)) {
527 printk(KERN_ERR MODULE_NAME ": Could not find initial mode\n");
528 }
529
530 if (fb_alloc_cmap(&info->cmap, 256, 1) < 0) {
531 err = -ENOMEM;
532 goto out_err_4;
533 }
534
535 err = register_framebuffer(info);
536 if (err) {
537 printk(KERN_ERR MODULE_NAME ": Register framebuffer error.\n");
538 goto out_err_5;
539 }
540
541 printk("Initialized vmlfb\n");
542
543 return 0;
544
545 out_err_5:
546 fb_dealloc_cmap(&info->cmap);
547 out_err_4:
548 vmlfb_free_vram(vinfo);
549 out_err_3:
550 vmlfb_disable_mmio(par);
551 out_err_2:
552 vmlfb_release_devices(par);
553 out_err_1:
554 kfree(vinfo);
555 out_err_0:
556 kfree(par);
557 return err;
558 }
559
560 static int vmlfb_open(struct fb_info *info, int user)
561 {
562 /*
563 * Save registers here?
564 */
565 return 0;
566 }
567
568 static int vmlfb_release(struct fb_info *info, int user)
569 {
570 /*
571 * Restore registers here.
572 */
573
574 return 0;
575 }
576
577 static int vml_nearest_clock(int clock)
578 {
579
580 int i;
581 int cur_index;
582 int cur_diff;
583 int diff;
584
585 cur_index = 0;
586 cur_diff = clock - vml_clocks[0];
587 cur_diff = (cur_diff < 0) ? -cur_diff : cur_diff;
588 for (i = 1; i < vml_num_clocks; ++i) {
589 diff = clock - vml_clocks[i];
590 diff = (diff < 0) ? -diff : diff;
591 if (diff < cur_diff) {
592 cur_index = i;
593 cur_diff = diff;
594 }
595 }
596 return vml_clocks[cur_index];
597 }
598
599 static int vmlfb_check_var_locked(struct fb_var_screeninfo *var,
600 struct vml_info *vinfo)
601 {
602 u32 pitch;
603 u64 mem;
604 int nearest_clock;
605 int clock;
606 int clock_diff;
607 struct fb_var_screeninfo v;
608
609 v = *var;
610 clock = PICOS2KHZ(var->pixclock);
611
612 if (subsys && subsys->nearest_clock) {
613 nearest_clock = subsys->nearest_clock(subsys, clock);
614 } else {
615 nearest_clock = vml_nearest_clock(clock);
616 }
617
618 /*
619 * Accept a 20% diff.
620 */
621
622 clock_diff = nearest_clock - clock;
623 clock_diff = (clock_diff < 0) ? -clock_diff : clock_diff;
624 if (clock_diff > clock / 5) {
625 #if 0
626 printk(KERN_DEBUG MODULE_NAME ": Diff failure. %d %d\n",clock_diff,clock);
627 #endif
628 return -EINVAL;
629 }
630
631 v.pixclock = KHZ2PICOS(nearest_clock);
632
633 if (var->xres > VML_MAX_XRES || var->yres > VML_MAX_YRES) {
634 printk(KERN_DEBUG MODULE_NAME ": Resolution failure.\n");
635 return -EINVAL;
636 }
637 if (var->xres_virtual > VML_MAX_XRES_VIRTUAL) {
638 printk(KERN_DEBUG MODULE_NAME
639 ": Virtual resolution failure.\n");
640 return -EINVAL;
641 }
642 switch (v.bits_per_pixel) {
643 case 0 ... 16:
644 v.bits_per_pixel = 16;
645 break;
646 case 17 ... 32:
647 v.bits_per_pixel = 32;
648 break;
649 default:
650 printk(KERN_DEBUG MODULE_NAME ": Invalid bpp: %d.\n",
651 var->bits_per_pixel);
652 return -EINVAL;
653 }
654
655 pitch = ALIGN((var->xres * var->bits_per_pixel) >> 3, 0x40);
656 mem = pitch * var->yres_virtual;
657 if (mem > vinfo->vram_contig_size) {
658 return -ENOMEM;
659 }
660
661 switch (v.bits_per_pixel) {
662 case 16:
663 if (var->blue.offset != 0 ||
664 var->blue.length != 5 ||
665 var->green.offset != 5 ||
666 var->green.length != 5 ||
667 var->red.offset != 10 ||
668 var->red.length != 5 ||
669 var->transp.offset != 15 || var->transp.length != 1) {
670 vmlfb_set_pref_pixel_format(&v);
671 }
672 break;
673 case 32:
674 if (var->blue.offset != 0 ||
675 var->blue.length != 8 ||
676 var->green.offset != 8 ||
677 var->green.length != 8 ||
678 var->red.offset != 16 ||
679 var->red.length != 8 ||
680 (var->transp.length != 0 && var->transp.length != 8) ||
681 (var->transp.length == 8 && var->transp.offset != 24)) {
682 vmlfb_set_pref_pixel_format(&v);
683 }
684 break;
685 default:
686 return -EINVAL;
687 }
688
689 *var = v;
690
691 return 0;
692 }
693
694 static int vmlfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
695 {
696 struct vml_info *vinfo = container_of(info, struct vml_info, info);
697 int ret;
698
699 mutex_lock(&vml_mutex);
700 ret = vmlfb_check_var_locked(var, vinfo);
701 mutex_unlock(&vml_mutex);
702
703 return ret;
704 }
705
706 static void vml_wait_vblank(struct vml_info *vinfo)
707 {
708 /* Wait for vblank. For now, just wait for a 50Hz cycle (20ms)) */
709 mdelay(20);
710 }
711
712 static void vmlfb_disable_pipe(struct vml_info *vinfo)
713 {
714 struct vml_par *par = vinfo->par;
715
716 /* Disable the MDVO pad */
717 VML_WRITE32(par, VML_RCOMPSTAT, 0);
718 while (!(VML_READ32(par, VML_RCOMPSTAT) & VML_MDVO_VDC_I_RCOMP)) ;
719
720 /* Disable display planes */
721 VML_WRITE32(par, VML_DSPCCNTR,
722 VML_READ32(par, VML_DSPCCNTR) & ~VML_GFX_ENABLE);
723 (void)VML_READ32(par, VML_DSPCCNTR);
724 /* Wait for vblank for the disable to take effect */
725 vml_wait_vblank(vinfo);
726
727 /* Next, disable display pipes */
728 VML_WRITE32(par, VML_PIPEACONF, 0);
729 (void)VML_READ32(par, VML_PIPEACONF);
730
731 vinfo->pipe_disabled = 1;
732 }
733
734 #ifdef VERMILION_DEBUG
735 static void vml_dump_regs(struct vml_info *vinfo)
736 {
737 struct vml_par *par = vinfo->par;
738
739 printk(KERN_DEBUG MODULE_NAME ": Modesetting register dump:\n");
740 printk(KERN_DEBUG MODULE_NAME ": \tHTOTAL_A : 0x%08x\n",
741 (unsigned)VML_READ32(par, VML_HTOTAL_A));
742 printk(KERN_DEBUG MODULE_NAME ": \tHBLANK_A : 0x%08x\n",
743 (unsigned)VML_READ32(par, VML_HBLANK_A));
744 printk(KERN_DEBUG MODULE_NAME ": \tHSYNC_A : 0x%08x\n",
745 (unsigned)VML_READ32(par, VML_HSYNC_A));
746 printk(KERN_DEBUG MODULE_NAME ": \tVTOTAL_A : 0x%08x\n",
747 (unsigned)VML_READ32(par, VML_VTOTAL_A));
748 printk(KERN_DEBUG MODULE_NAME ": \tVBLANK_A : 0x%08x\n",
749 (unsigned)VML_READ32(par, VML_VBLANK_A));
750 printk(KERN_DEBUG MODULE_NAME ": \tVSYNC_A : 0x%08x\n",
751 (unsigned)VML_READ32(par, VML_VSYNC_A));
752 printk(KERN_DEBUG MODULE_NAME ": \tDSPCSTRIDE : 0x%08x\n",
753 (unsigned)VML_READ32(par, VML_DSPCSTRIDE));
754 printk(KERN_DEBUG MODULE_NAME ": \tDSPCSIZE : 0x%08x\n",
755 (unsigned)VML_READ32(par, VML_DSPCSIZE));
756 printk(KERN_DEBUG MODULE_NAME ": \tDSPCPOS : 0x%08x\n",
757 (unsigned)VML_READ32(par, VML_DSPCPOS));
758 printk(KERN_DEBUG MODULE_NAME ": \tDSPARB : 0x%08x\n",
759 (unsigned)VML_READ32(par, VML_DSPARB));
760 printk(KERN_DEBUG MODULE_NAME ": \tDSPCADDR : 0x%08x\n",
761 (unsigned)VML_READ32(par, VML_DSPCADDR));
762 printk(KERN_DEBUG MODULE_NAME ": \tBCLRPAT_A : 0x%08x\n",
763 (unsigned)VML_READ32(par, VML_BCLRPAT_A));
764 printk(KERN_DEBUG MODULE_NAME ": \tCANVSCLR_A : 0x%08x\n",
765 (unsigned)VML_READ32(par, VML_CANVSCLR_A));
766 printk(KERN_DEBUG MODULE_NAME ": \tPIPEASRC : 0x%08x\n",
767 (unsigned)VML_READ32(par, VML_PIPEASRC));
768 printk(KERN_DEBUG MODULE_NAME ": \tPIPEACONF : 0x%08x\n",
769 (unsigned)VML_READ32(par, VML_PIPEACONF));
770 printk(KERN_DEBUG MODULE_NAME ": \tDSPCCNTR : 0x%08x\n",
771 (unsigned)VML_READ32(par, VML_DSPCCNTR));
772 printk(KERN_DEBUG MODULE_NAME ": \tRCOMPSTAT : 0x%08x\n",
773 (unsigned)VML_READ32(par, VML_RCOMPSTAT));
774 printk(KERN_DEBUG MODULE_NAME ": End of modesetting register dump.\n");
775 }
776 #endif
777
778 static int vmlfb_set_par_locked(struct vml_info *vinfo)
779 {
780 struct vml_par *par = vinfo->par;
781 struct fb_info *info = &vinfo->info;
782 struct fb_var_screeninfo *var = &info->var;
783 u32 htotal, hactive, hblank_start, hblank_end, hsync_start, hsync_end;
784 u32 vtotal, vactive, vblank_start, vblank_end, vsync_start, vsync_end;
785 u32 dspcntr;
786 int clock;
787
788 vinfo->bytes_per_pixel = var->bits_per_pixel >> 3;
789 vinfo->stride = ALIGN(var->xres_virtual * vinfo->bytes_per_pixel, 0x40);
790 info->fix.line_length = vinfo->stride;
791
792 if (!subsys)
793 return 0;
794
795 htotal =
796 var->xres + var->right_margin + var->hsync_len + var->left_margin;
797 hactive = var->xres;
798 hblank_start = var->xres;
799 hblank_end = htotal;
800 hsync_start = hactive + var->right_margin;
801 hsync_end = hsync_start + var->hsync_len;
802
803 vtotal =
804 var->yres + var->lower_margin + var->vsync_len + var->upper_margin;
805 vactive = var->yres;
806 vblank_start = var->yres;
807 vblank_end = vtotal;
808 vsync_start = vactive + var->lower_margin;
809 vsync_end = vsync_start + var->vsync_len;
810
811 dspcntr = VML_GFX_ENABLE | VML_GFX_GAMMABYPASS;
812 clock = PICOS2KHZ(var->pixclock);
813
814 if (subsys->nearest_clock) {
815 clock = subsys->nearest_clock(subsys, clock);
816 } else {
817 clock = vml_nearest_clock(clock);
818 }
819 printk(KERN_DEBUG MODULE_NAME
820 ": Set mode Hfreq : %d kHz, Vfreq : %d Hz.\n", clock / htotal,
821 ((clock / htotal) * 1000) / vtotal);
822
823 switch (var->bits_per_pixel) {
824 case 16:
825 dspcntr |= VML_GFX_ARGB1555;
826 break;
827 case 32:
828 if (var->transp.length == 8)
829 dspcntr |= VML_GFX_ARGB8888 | VML_GFX_ALPHAMULT;
830 else
831 dspcntr |= VML_GFX_RGB0888;
832 break;
833 default:
834 return -EINVAL;
835 }
836
837 vmlfb_disable_pipe(vinfo);
838 mb();
839
840 if (subsys->set_clock)
841 subsys->set_clock(subsys, clock);
842 else
843 return -EINVAL;
844
845 VML_WRITE32(par, VML_HTOTAL_A, ((htotal - 1) << 16) | (hactive - 1));
846 VML_WRITE32(par, VML_HBLANK_A,
847 ((hblank_end - 1) << 16) | (hblank_start - 1));
848 VML_WRITE32(par, VML_HSYNC_A,
849 ((hsync_end - 1) << 16) | (hsync_start - 1));
850 VML_WRITE32(par, VML_VTOTAL_A, ((vtotal - 1) << 16) | (vactive - 1));
851 VML_WRITE32(par, VML_VBLANK_A,
852 ((vblank_end - 1) << 16) | (vblank_start - 1));
853 VML_WRITE32(par, VML_VSYNC_A,
854 ((vsync_end - 1) << 16) | (vsync_start - 1));
855 VML_WRITE32(par, VML_DSPCSTRIDE, vinfo->stride);
856 VML_WRITE32(par, VML_DSPCSIZE,
857 ((var->yres - 1) << 16) | (var->xres - 1));
858 VML_WRITE32(par, VML_DSPCPOS, 0x00000000);
859 VML_WRITE32(par, VML_DSPARB, VML_FIFO_DEFAULT);
860 VML_WRITE32(par, VML_BCLRPAT_A, 0x00000000);
861 VML_WRITE32(par, VML_CANVSCLR_A, 0x00000000);
862 VML_WRITE32(par, VML_PIPEASRC,
863 ((var->xres - 1) << 16) | (var->yres - 1));
864
865 wmb();
866 VML_WRITE32(par, VML_PIPEACONF, VML_PIPE_ENABLE);
867 wmb();
868 VML_WRITE32(par, VML_DSPCCNTR, dspcntr);
869 wmb();
870 VML_WRITE32(par, VML_DSPCADDR, (u32) vinfo->vram_start +
871 var->yoffset * vinfo->stride +
872 var->xoffset * vinfo->bytes_per_pixel);
873
874 VML_WRITE32(par, VML_RCOMPSTAT, VML_MDVO_PAD_ENABLE);
875
876 while (!(VML_READ32(par, VML_RCOMPSTAT) &
877 (VML_MDVO_VDC_I_RCOMP | VML_MDVO_PAD_ENABLE))) ;
878
879 vinfo->pipe_disabled = 0;
880 #ifdef VERMILION_DEBUG
881 vml_dump_regs(vinfo);
882 #endif
883
884 return 0;
885 }
886
887 static int vmlfb_set_par(struct fb_info *info)
888 {
889 struct vml_info *vinfo = container_of(info, struct vml_info, info);
890 int ret;
891
892 mutex_lock(&vml_mutex);
893 list_move(&vinfo->head, (subsys) ? &global_has_mode : &global_no_mode);
894 ret = vmlfb_set_par_locked(vinfo);
895
896 mutex_unlock(&vml_mutex);
897 return ret;
898 }
899
900 static int vmlfb_blank_locked(struct vml_info *vinfo)
901 {
902 struct vml_par *par = vinfo->par;
903 u32 cur = VML_READ32(par, VML_PIPEACONF);
904
905 switch (vinfo->cur_blank_mode) {
906 case FB_BLANK_UNBLANK:
907 if (vinfo->pipe_disabled) {
908 vmlfb_set_par_locked(vinfo);
909 }
910 VML_WRITE32(par, VML_PIPEACONF, cur & ~VML_PIPE_FORCE_BORDER);
911 (void)VML_READ32(par, VML_PIPEACONF);
912 break;
913 case FB_BLANK_NORMAL:
914 if (vinfo->pipe_disabled) {
915 vmlfb_set_par_locked(vinfo);
916 }
917 VML_WRITE32(par, VML_PIPEACONF, cur | VML_PIPE_FORCE_BORDER);
918 (void)VML_READ32(par, VML_PIPEACONF);
919 break;
920 case FB_BLANK_VSYNC_SUSPEND:
921 case FB_BLANK_HSYNC_SUSPEND:
922 if (!vinfo->pipe_disabled) {
923 vmlfb_disable_pipe(vinfo);
924 }
925 break;
926 case FB_BLANK_POWERDOWN:
927 if (!vinfo->pipe_disabled) {
928 vmlfb_disable_pipe(vinfo);
929 }
930 break;
931 default:
932 return -EINVAL;
933 }
934
935 return 0;
936 }
937
938 static int vmlfb_blank(int blank_mode, struct fb_info *info)
939 {
940 struct vml_info *vinfo = container_of(info, struct vml_info, info);
941 int ret;
942
943 mutex_lock(&vml_mutex);
944 vinfo->cur_blank_mode = blank_mode;
945 ret = vmlfb_blank_locked(vinfo);
946 mutex_unlock(&vml_mutex);
947 return ret;
948 }
949
950 static int vmlfb_pan_display(struct fb_var_screeninfo *var,
951 struct fb_info *info)
952 {
953 struct vml_info *vinfo = container_of(info, struct vml_info, info);
954 struct vml_par *par = vinfo->par;
955
956 mutex_lock(&vml_mutex);
957 VML_WRITE32(par, VML_DSPCADDR, (u32) vinfo->vram_start +
958 var->yoffset * vinfo->stride +
959 var->xoffset * vinfo->bytes_per_pixel);
960 (void)VML_READ32(par, VML_DSPCADDR);
961 mutex_unlock(&vml_mutex);
962
963 return 0;
964 }
965
966 static int vmlfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
967 u_int transp, struct fb_info *info)
968 {
969 u32 v;
970
971 if (regno >= 16)
972 return -EINVAL;
973
974 if (info->var.grayscale) {
975 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
976 }
977
978 if (info->fix.visual != FB_VISUAL_TRUECOLOR)
979 return -EINVAL;
980
981 red = VML_TOHW(red, info->var.red.length);
982 blue = VML_TOHW(blue, info->var.blue.length);
983 green = VML_TOHW(green, info->var.green.length);
984 transp = VML_TOHW(transp, info->var.transp.length);
985
986 v = (red << info->var.red.offset) |
987 (green << info->var.green.offset) |
988 (blue << info->var.blue.offset) |
989 (transp << info->var.transp.offset);
990
991 switch (info->var.bits_per_pixel) {
992 case 16:
993 ((u32 *) info->pseudo_palette)[regno] = v;
994 break;
995 case 24:
996 case 32:
997 ((u32 *) info->pseudo_palette)[regno] = v;
998 break;
999 }
1000 return 0;
1001 }
1002
1003 static int vmlfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
1004 {
1005 struct vml_info *vinfo = container_of(info, struct vml_info, info);
1006 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
1007 int ret;
1008
1009 ret = vmlfb_vram_offset(vinfo, offset);
1010 if (ret)
1011 return -EINVAL;
1012
1013 pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
1014 pgprot_val(vma->vm_page_prot) &= ~_PAGE_PWT;
1015
1016 return vm_iomap_memory(vma, vinfo->vram_start,
1017 vinfo->vram_contig_size);
1018 }
1019
1020 static int vmlfb_sync(struct fb_info *info)
1021 {
1022 return 0;
1023 }
1024
1025 static int vmlfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1026 {
1027 return -EINVAL; /* just to force soft_cursor() call */
1028 }
1029
1030 static struct fb_ops vmlfb_ops = {
1031 .owner = THIS_MODULE,
1032 .fb_open = vmlfb_open,
1033 .fb_release = vmlfb_release,
1034 .fb_check_var = vmlfb_check_var,
1035 .fb_set_par = vmlfb_set_par,
1036 .fb_blank = vmlfb_blank,
1037 .fb_pan_display = vmlfb_pan_display,
1038 .fb_fillrect = cfb_fillrect,
1039 .fb_copyarea = cfb_copyarea,
1040 .fb_imageblit = cfb_imageblit,
1041 .fb_cursor = vmlfb_cursor,
1042 .fb_sync = vmlfb_sync,
1043 .fb_mmap = vmlfb_mmap,
1044 .fb_setcolreg = vmlfb_setcolreg
1045 };
1046
1047 static struct pci_device_id vml_ids[] = {
1048 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, VML_DEVICE_VDC)},
1049 {0}
1050 };
1051
1052 static struct pci_driver vmlfb_pci_driver = {
1053 .name = "vmlfb",
1054 .id_table = vml_ids,
1055 .probe = vml_pci_probe,
1056 .remove = vml_pci_remove,
1057 };
1058
1059 static void __exit vmlfb_cleanup(void)
1060 {
1061 pci_unregister_driver(&vmlfb_pci_driver);
1062 }
1063
1064 static int __init vmlfb_init(void)
1065 {
1066
1067 #ifndef MODULE
1068 char *option = NULL;
1069
1070 if (fb_get_options(MODULE_NAME, &option))
1071 return -ENODEV;
1072 #endif
1073
1074 printk(KERN_DEBUG MODULE_NAME ": initializing\n");
1075 mutex_init(&vml_mutex);
1076 INIT_LIST_HEAD(&global_no_mode);
1077 INIT_LIST_HEAD(&global_has_mode);
1078
1079 return pci_register_driver(&vmlfb_pci_driver);
1080 }
1081
1082 int vmlfb_register_subsys(struct vml_sys *sys)
1083 {
1084 struct vml_info *entry;
1085 struct list_head *list;
1086 u32 save_activate;
1087
1088 mutex_lock(&vml_mutex);
1089 if (subsys != NULL) {
1090 subsys->restore(subsys);
1091 }
1092 subsys = sys;
1093 subsys->save(subsys);
1094
1095 /*
1096 * We need to restart list traversal for each item, since we
1097 * release the list mutex in the loop.
1098 */
1099
1100 list = global_no_mode.next;
1101 while (list != &global_no_mode) {
1102 list_del_init(list);
1103 entry = list_entry(list, struct vml_info, head);
1104
1105 /*
1106 * First, try the current mode which might not be
1107 * completely validated with respect to the pixel clock.
1108 */
1109
1110 if (!vmlfb_check_var_locked(&entry->info.var, entry)) {
1111 vmlfb_set_par_locked(entry);
1112 list_add_tail(list, &global_has_mode);
1113 } else {
1114
1115 /*
1116 * Didn't work. Try to find another mode,
1117 * that matches this subsys.
1118 */
1119
1120 mutex_unlock(&vml_mutex);
1121 save_activate = entry->info.var.activate;
1122 entry->info.var.bits_per_pixel = 16;
1123 vmlfb_set_pref_pixel_format(&entry->info.var);
1124 if (fb_find_mode(&entry->info.var,
1125 &entry->info,
1126 vml_default_mode, NULL, 0, NULL, 16)) {
1127 entry->info.var.activate |=
1128 FB_ACTIVATE_FORCE | FB_ACTIVATE_NOW;
1129 fb_set_var(&entry->info, &entry->info.var);
1130 } else {
1131 printk(KERN_ERR MODULE_NAME
1132 ": Sorry. no mode found for this subsys.\n");
1133 }
1134 entry->info.var.activate = save_activate;
1135 mutex_lock(&vml_mutex);
1136 }
1137 vmlfb_blank_locked(entry);
1138 list = global_no_mode.next;
1139 }
1140 mutex_unlock(&vml_mutex);
1141
1142 printk(KERN_DEBUG MODULE_NAME ": Registered %s subsystem.\n",
1143 subsys->name ? subsys->name : "unknown");
1144 return 0;
1145 }
1146
1147 EXPORT_SYMBOL_GPL(vmlfb_register_subsys);
1148
1149 void vmlfb_unregister_subsys(struct vml_sys *sys)
1150 {
1151 struct vml_info *entry, *next;
1152
1153 mutex_lock(&vml_mutex);
1154 if (subsys != sys) {
1155 mutex_unlock(&vml_mutex);
1156 return;
1157 }
1158 subsys->restore(subsys);
1159 subsys = NULL;
1160 list_for_each_entry_safe(entry, next, &global_has_mode, head) {
1161 printk(KERN_DEBUG MODULE_NAME ": subsys disable pipe\n");
1162 vmlfb_disable_pipe(entry);
1163 list_move_tail(&entry->head, &global_no_mode);
1164 }
1165 mutex_unlock(&vml_mutex);
1166 }
1167
1168 EXPORT_SYMBOL_GPL(vmlfb_unregister_subsys);
1169
1170 module_init(vmlfb_init);
1171 module_exit(vmlfb_cleanup);
1172
1173 MODULE_AUTHOR("Tungsten Graphics");
1174 MODULE_DESCRIPTION("Initialization of the Vermilion display devices");
1175 MODULE_VERSION("1.0.0");
1176 MODULE_LICENSE("GPL");
Linus' kernel tree